File: | clang/lib/Sema/SemaInit.cpp |
Warning: | line 7013, column 16 Called C++ object pointer is null |
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1 | //===--- SemaInit.cpp - Semantic Analysis for Initializers ----------------===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | // This file implements semantic analysis for initializers. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #include "clang/AST/ASTContext.h" | ||||||
14 | #include "clang/AST/DeclObjC.h" | ||||||
15 | #include "clang/AST/ExprCXX.h" | ||||||
16 | #include "clang/AST/ExprObjC.h" | ||||||
17 | #include "clang/AST/ExprOpenMP.h" | ||||||
18 | #include "clang/AST/TypeLoc.h" | ||||||
19 | #include "clang/Basic/CharInfo.h" | ||||||
20 | #include "clang/Basic/SourceManager.h" | ||||||
21 | #include "clang/Basic/TargetInfo.h" | ||||||
22 | #include "clang/Sema/Designator.h" | ||||||
23 | #include "clang/Sema/Initialization.h" | ||||||
24 | #include "clang/Sema/Lookup.h" | ||||||
25 | #include "clang/Sema/SemaInternal.h" | ||||||
26 | #include "llvm/ADT/APInt.h" | ||||||
27 | #include "llvm/ADT/PointerIntPair.h" | ||||||
28 | #include "llvm/ADT/SmallString.h" | ||||||
29 | #include "llvm/Support/ErrorHandling.h" | ||||||
30 | #include "llvm/Support/raw_ostream.h" | ||||||
31 | |||||||
32 | using namespace clang; | ||||||
33 | |||||||
34 | //===----------------------------------------------------------------------===// | ||||||
35 | // Sema Initialization Checking | ||||||
36 | //===----------------------------------------------------------------------===// | ||||||
37 | |||||||
38 | /// Check whether T is compatible with a wide character type (wchar_t, | ||||||
39 | /// char16_t or char32_t). | ||||||
40 | static bool IsWideCharCompatible(QualType T, ASTContext &Context) { | ||||||
41 | if (Context.typesAreCompatible(Context.getWideCharType(), T)) | ||||||
42 | return true; | ||||||
43 | if (Context.getLangOpts().CPlusPlus || Context.getLangOpts().C11) { | ||||||
44 | return Context.typesAreCompatible(Context.Char16Ty, T) || | ||||||
45 | Context.typesAreCompatible(Context.Char32Ty, T); | ||||||
46 | } | ||||||
47 | return false; | ||||||
48 | } | ||||||
49 | |||||||
50 | enum StringInitFailureKind { | ||||||
51 | SIF_None, | ||||||
52 | SIF_NarrowStringIntoWideChar, | ||||||
53 | SIF_WideStringIntoChar, | ||||||
54 | SIF_IncompatWideStringIntoWideChar, | ||||||
55 | SIF_UTF8StringIntoPlainChar, | ||||||
56 | SIF_PlainStringIntoUTF8Char, | ||||||
57 | SIF_Other | ||||||
58 | }; | ||||||
59 | |||||||
60 | /// Check whether the array of type AT can be initialized by the Init | ||||||
61 | /// expression by means of string initialization. Returns SIF_None if so, | ||||||
62 | /// otherwise returns a StringInitFailureKind that describes why the | ||||||
63 | /// initialization would not work. | ||||||
64 | static StringInitFailureKind IsStringInit(Expr *Init, const ArrayType *AT, | ||||||
65 | ASTContext &Context) { | ||||||
66 | if (!isa<ConstantArrayType>(AT) && !isa<IncompleteArrayType>(AT)) | ||||||
67 | return SIF_Other; | ||||||
68 | |||||||
69 | // See if this is a string literal or @encode. | ||||||
70 | Init = Init->IgnoreParens(); | ||||||
71 | |||||||
72 | // Handle @encode, which is a narrow string. | ||||||
73 | if (isa<ObjCEncodeExpr>(Init) && AT->getElementType()->isCharType()) | ||||||
74 | return SIF_None; | ||||||
75 | |||||||
76 | // Otherwise we can only handle string literals. | ||||||
77 | StringLiteral *SL = dyn_cast<StringLiteral>(Init); | ||||||
78 | if (!SL) | ||||||
79 | return SIF_Other; | ||||||
80 | |||||||
81 | const QualType ElemTy = | ||||||
82 | Context.getCanonicalType(AT->getElementType()).getUnqualifiedType(); | ||||||
83 | |||||||
84 | switch (SL->getKind()) { | ||||||
85 | case StringLiteral::UTF8: | ||||||
86 | // char8_t array can be initialized with a UTF-8 string. | ||||||
87 | if (ElemTy->isChar8Type()) | ||||||
88 | return SIF_None; | ||||||
89 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
90 | case StringLiteral::Ascii: | ||||||
91 | // char array can be initialized with a narrow string. | ||||||
92 | // Only allow char x[] = "foo"; not char x[] = L"foo"; | ||||||
93 | if (ElemTy->isCharType()) | ||||||
94 | return (SL->getKind() == StringLiteral::UTF8 && | ||||||
95 | Context.getLangOpts().Char8) | ||||||
96 | ? SIF_UTF8StringIntoPlainChar | ||||||
97 | : SIF_None; | ||||||
98 | if (ElemTy->isChar8Type()) | ||||||
99 | return SIF_PlainStringIntoUTF8Char; | ||||||
100 | if (IsWideCharCompatible(ElemTy, Context)) | ||||||
101 | return SIF_NarrowStringIntoWideChar; | ||||||
102 | return SIF_Other; | ||||||
103 | // C99 6.7.8p15 (with correction from DR343), or C11 6.7.9p15: | ||||||
104 | // "An array with element type compatible with a qualified or unqualified | ||||||
105 | // version of wchar_t, char16_t, or char32_t may be initialized by a wide | ||||||
106 | // string literal with the corresponding encoding prefix (L, u, or U, | ||||||
107 | // respectively), optionally enclosed in braces. | ||||||
108 | case StringLiteral::UTF16: | ||||||
109 | if (Context.typesAreCompatible(Context.Char16Ty, ElemTy)) | ||||||
110 | return SIF_None; | ||||||
111 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||||
112 | return SIF_WideStringIntoChar; | ||||||
113 | if (IsWideCharCompatible(ElemTy, Context)) | ||||||
114 | return SIF_IncompatWideStringIntoWideChar; | ||||||
115 | return SIF_Other; | ||||||
116 | case StringLiteral::UTF32: | ||||||
117 | if (Context.typesAreCompatible(Context.Char32Ty, ElemTy)) | ||||||
118 | return SIF_None; | ||||||
119 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||||
120 | return SIF_WideStringIntoChar; | ||||||
121 | if (IsWideCharCompatible(ElemTy, Context)) | ||||||
122 | return SIF_IncompatWideStringIntoWideChar; | ||||||
123 | return SIF_Other; | ||||||
124 | case StringLiteral::Wide: | ||||||
125 | if (Context.typesAreCompatible(Context.getWideCharType(), ElemTy)) | ||||||
126 | return SIF_None; | ||||||
127 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||||
128 | return SIF_WideStringIntoChar; | ||||||
129 | if (IsWideCharCompatible(ElemTy, Context)) | ||||||
130 | return SIF_IncompatWideStringIntoWideChar; | ||||||
131 | return SIF_Other; | ||||||
132 | } | ||||||
133 | |||||||
134 | llvm_unreachable("missed a StringLiteral kind?")::llvm::llvm_unreachable_internal("missed a StringLiteral kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 134); | ||||||
135 | } | ||||||
136 | |||||||
137 | static StringInitFailureKind IsStringInit(Expr *init, QualType declType, | ||||||
138 | ASTContext &Context) { | ||||||
139 | const ArrayType *arrayType = Context.getAsArrayType(declType); | ||||||
140 | if (!arrayType) | ||||||
141 | return SIF_Other; | ||||||
142 | return IsStringInit(init, arrayType, Context); | ||||||
143 | } | ||||||
144 | |||||||
145 | bool Sema::IsStringInit(Expr *Init, const ArrayType *AT) { | ||||||
146 | return ::IsStringInit(Init, AT, Context) == SIF_None; | ||||||
147 | } | ||||||
148 | |||||||
149 | /// Update the type of a string literal, including any surrounding parentheses, | ||||||
150 | /// to match the type of the object which it is initializing. | ||||||
151 | static void updateStringLiteralType(Expr *E, QualType Ty) { | ||||||
152 | while (true) { | ||||||
153 | E->setType(Ty); | ||||||
154 | E->setValueKind(VK_PRValue); | ||||||
155 | if (isa<StringLiteral>(E) || isa<ObjCEncodeExpr>(E)) { | ||||||
156 | break; | ||||||
157 | } else if (ParenExpr *PE = dyn_cast<ParenExpr>(E)) { | ||||||
158 | E = PE->getSubExpr(); | ||||||
159 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | ||||||
160 | assert(UO->getOpcode() == UO_Extension)(static_cast <bool> (UO->getOpcode() == UO_Extension ) ? void (0) : __assert_fail ("UO->getOpcode() == UO_Extension" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 160, __extension__ __PRETTY_FUNCTION__)); | ||||||
161 | E = UO->getSubExpr(); | ||||||
162 | } else if (GenericSelectionExpr *GSE = dyn_cast<GenericSelectionExpr>(E)) { | ||||||
163 | E = GSE->getResultExpr(); | ||||||
164 | } else if (ChooseExpr *CE = dyn_cast<ChooseExpr>(E)) { | ||||||
165 | E = CE->getChosenSubExpr(); | ||||||
166 | } else { | ||||||
167 | llvm_unreachable("unexpected expr in string literal init")::llvm::llvm_unreachable_internal("unexpected expr in string literal init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 167); | ||||||
168 | } | ||||||
169 | } | ||||||
170 | } | ||||||
171 | |||||||
172 | /// Fix a compound literal initializing an array so it's correctly marked | ||||||
173 | /// as an rvalue. | ||||||
174 | static void updateGNUCompoundLiteralRValue(Expr *E) { | ||||||
175 | while (true) { | ||||||
176 | E->setValueKind(VK_PRValue); | ||||||
177 | if (isa<CompoundLiteralExpr>(E)) { | ||||||
178 | break; | ||||||
179 | } else if (ParenExpr *PE = dyn_cast<ParenExpr>(E)) { | ||||||
180 | E = PE->getSubExpr(); | ||||||
181 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | ||||||
182 | assert(UO->getOpcode() == UO_Extension)(static_cast <bool> (UO->getOpcode() == UO_Extension ) ? void (0) : __assert_fail ("UO->getOpcode() == UO_Extension" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 182, __extension__ __PRETTY_FUNCTION__)); | ||||||
183 | E = UO->getSubExpr(); | ||||||
184 | } else if (GenericSelectionExpr *GSE = dyn_cast<GenericSelectionExpr>(E)) { | ||||||
185 | E = GSE->getResultExpr(); | ||||||
186 | } else if (ChooseExpr *CE = dyn_cast<ChooseExpr>(E)) { | ||||||
187 | E = CE->getChosenSubExpr(); | ||||||
188 | } else { | ||||||
189 | llvm_unreachable("unexpected expr in array compound literal init")::llvm::llvm_unreachable_internal("unexpected expr in array compound literal init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 189); | ||||||
190 | } | ||||||
191 | } | ||||||
192 | } | ||||||
193 | |||||||
194 | static void CheckStringInit(Expr *Str, QualType &DeclT, const ArrayType *AT, | ||||||
195 | Sema &S) { | ||||||
196 | // Get the length of the string as parsed. | ||||||
197 | auto *ConstantArrayTy = | ||||||
198 | cast<ConstantArrayType>(Str->getType()->getAsArrayTypeUnsafe()); | ||||||
199 | uint64_t StrLength = ConstantArrayTy->getSize().getZExtValue(); | ||||||
200 | |||||||
201 | if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { | ||||||
202 | // C99 6.7.8p14. We have an array of character type with unknown size | ||||||
203 | // being initialized to a string literal. | ||||||
204 | llvm::APInt ConstVal(32, StrLength); | ||||||
205 | // Return a new array type (C99 6.7.8p22). | ||||||
206 | DeclT = S.Context.getConstantArrayType(IAT->getElementType(), | ||||||
207 | ConstVal, nullptr, | ||||||
208 | ArrayType::Normal, 0); | ||||||
209 | updateStringLiteralType(Str, DeclT); | ||||||
210 | return; | ||||||
211 | } | ||||||
212 | |||||||
213 | const ConstantArrayType *CAT = cast<ConstantArrayType>(AT); | ||||||
214 | |||||||
215 | // We have an array of character type with known size. However, | ||||||
216 | // the size may be smaller or larger than the string we are initializing. | ||||||
217 | // FIXME: Avoid truncation for 64-bit length strings. | ||||||
218 | if (S.getLangOpts().CPlusPlus) { | ||||||
219 | if (StringLiteral *SL = dyn_cast<StringLiteral>(Str->IgnoreParens())) { | ||||||
220 | // For Pascal strings it's OK to strip off the terminating null character, | ||||||
221 | // so the example below is valid: | ||||||
222 | // | ||||||
223 | // unsigned char a[2] = "\pa"; | ||||||
224 | if (SL->isPascal()) | ||||||
225 | StrLength--; | ||||||
226 | } | ||||||
227 | |||||||
228 | // [dcl.init.string]p2 | ||||||
229 | if (StrLength > CAT->getSize().getZExtValue()) | ||||||
230 | S.Diag(Str->getBeginLoc(), | ||||||
231 | diag::err_initializer_string_for_char_array_too_long) | ||||||
232 | << Str->getSourceRange(); | ||||||
233 | } else { | ||||||
234 | // C99 6.7.8p14. | ||||||
235 | if (StrLength-1 > CAT->getSize().getZExtValue()) | ||||||
236 | S.Diag(Str->getBeginLoc(), | ||||||
237 | diag::ext_initializer_string_for_char_array_too_long) | ||||||
238 | << Str->getSourceRange(); | ||||||
239 | } | ||||||
240 | |||||||
241 | // Set the type to the actual size that we are initializing. If we have | ||||||
242 | // something like: | ||||||
243 | // char x[1] = "foo"; | ||||||
244 | // then this will set the string literal's type to char[1]. | ||||||
245 | updateStringLiteralType(Str, DeclT); | ||||||
246 | } | ||||||
247 | |||||||
248 | //===----------------------------------------------------------------------===// | ||||||
249 | // Semantic checking for initializer lists. | ||||||
250 | //===----------------------------------------------------------------------===// | ||||||
251 | |||||||
252 | namespace { | ||||||
253 | |||||||
254 | /// Semantic checking for initializer lists. | ||||||
255 | /// | ||||||
256 | /// The InitListChecker class contains a set of routines that each | ||||||
257 | /// handle the initialization of a certain kind of entity, e.g., | ||||||
258 | /// arrays, vectors, struct/union types, scalars, etc. The | ||||||
259 | /// InitListChecker itself performs a recursive walk of the subobject | ||||||
260 | /// structure of the type to be initialized, while stepping through | ||||||
261 | /// the initializer list one element at a time. The IList and Index | ||||||
262 | /// parameters to each of the Check* routines contain the active | ||||||
263 | /// (syntactic) initializer list and the index into that initializer | ||||||
264 | /// list that represents the current initializer. Each routine is | ||||||
265 | /// responsible for moving that Index forward as it consumes elements. | ||||||
266 | /// | ||||||
267 | /// Each Check* routine also has a StructuredList/StructuredIndex | ||||||
268 | /// arguments, which contains the current "structured" (semantic) | ||||||
269 | /// initializer list and the index into that initializer list where we | ||||||
270 | /// are copying initializers as we map them over to the semantic | ||||||
271 | /// list. Once we have completed our recursive walk of the subobject | ||||||
272 | /// structure, we will have constructed a full semantic initializer | ||||||
273 | /// list. | ||||||
274 | /// | ||||||
275 | /// C99 designators cause changes in the initializer list traversal, | ||||||
276 | /// because they make the initialization "jump" into a specific | ||||||
277 | /// subobject and then continue the initialization from that | ||||||
278 | /// point. CheckDesignatedInitializer() recursively steps into the | ||||||
279 | /// designated subobject and manages backing out the recursion to | ||||||
280 | /// initialize the subobjects after the one designated. | ||||||
281 | /// | ||||||
282 | /// If an initializer list contains any designators, we build a placeholder | ||||||
283 | /// structured list even in 'verify only' mode, so that we can track which | ||||||
284 | /// elements need 'empty' initializtion. | ||||||
285 | class InitListChecker { | ||||||
286 | Sema &SemaRef; | ||||||
287 | bool hadError = false; | ||||||
288 | bool VerifyOnly; // No diagnostics. | ||||||
289 | bool TreatUnavailableAsInvalid; // Used only in VerifyOnly mode. | ||||||
290 | bool InOverloadResolution; | ||||||
291 | InitListExpr *FullyStructuredList = nullptr; | ||||||
292 | NoInitExpr *DummyExpr = nullptr; | ||||||
293 | |||||||
294 | NoInitExpr *getDummyInit() { | ||||||
295 | if (!DummyExpr) | ||||||
296 | DummyExpr = new (SemaRef.Context) NoInitExpr(SemaRef.Context.VoidTy); | ||||||
297 | return DummyExpr; | ||||||
298 | } | ||||||
299 | |||||||
300 | void CheckImplicitInitList(const InitializedEntity &Entity, | ||||||
301 | InitListExpr *ParentIList, QualType T, | ||||||
302 | unsigned &Index, InitListExpr *StructuredList, | ||||||
303 | unsigned &StructuredIndex); | ||||||
304 | void CheckExplicitInitList(const InitializedEntity &Entity, | ||||||
305 | InitListExpr *IList, QualType &T, | ||||||
306 | InitListExpr *StructuredList, | ||||||
307 | bool TopLevelObject = false); | ||||||
308 | void CheckListElementTypes(const InitializedEntity &Entity, | ||||||
309 | InitListExpr *IList, QualType &DeclType, | ||||||
310 | bool SubobjectIsDesignatorContext, | ||||||
311 | unsigned &Index, | ||||||
312 | InitListExpr *StructuredList, | ||||||
313 | unsigned &StructuredIndex, | ||||||
314 | bool TopLevelObject = false); | ||||||
315 | void CheckSubElementType(const InitializedEntity &Entity, | ||||||
316 | InitListExpr *IList, QualType ElemType, | ||||||
317 | unsigned &Index, | ||||||
318 | InitListExpr *StructuredList, | ||||||
319 | unsigned &StructuredIndex, | ||||||
320 | bool DirectlyDesignated = false); | ||||||
321 | void CheckComplexType(const InitializedEntity &Entity, | ||||||
322 | InitListExpr *IList, QualType DeclType, | ||||||
323 | unsigned &Index, | ||||||
324 | InitListExpr *StructuredList, | ||||||
325 | unsigned &StructuredIndex); | ||||||
326 | void CheckScalarType(const InitializedEntity &Entity, | ||||||
327 | InitListExpr *IList, QualType DeclType, | ||||||
328 | unsigned &Index, | ||||||
329 | InitListExpr *StructuredList, | ||||||
330 | unsigned &StructuredIndex); | ||||||
331 | void CheckReferenceType(const InitializedEntity &Entity, | ||||||
332 | InitListExpr *IList, QualType DeclType, | ||||||
333 | unsigned &Index, | ||||||
334 | InitListExpr *StructuredList, | ||||||
335 | unsigned &StructuredIndex); | ||||||
336 | void CheckVectorType(const InitializedEntity &Entity, | ||||||
337 | InitListExpr *IList, QualType DeclType, unsigned &Index, | ||||||
338 | InitListExpr *StructuredList, | ||||||
339 | unsigned &StructuredIndex); | ||||||
340 | void CheckStructUnionTypes(const InitializedEntity &Entity, | ||||||
341 | InitListExpr *IList, QualType DeclType, | ||||||
342 | CXXRecordDecl::base_class_range Bases, | ||||||
343 | RecordDecl::field_iterator Field, | ||||||
344 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||||
345 | InitListExpr *StructuredList, | ||||||
346 | unsigned &StructuredIndex, | ||||||
347 | bool TopLevelObject = false); | ||||||
348 | void CheckArrayType(const InitializedEntity &Entity, | ||||||
349 | InitListExpr *IList, QualType &DeclType, | ||||||
350 | llvm::APSInt elementIndex, | ||||||
351 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||||
352 | InitListExpr *StructuredList, | ||||||
353 | unsigned &StructuredIndex); | ||||||
354 | bool CheckDesignatedInitializer(const InitializedEntity &Entity, | ||||||
355 | InitListExpr *IList, DesignatedInitExpr *DIE, | ||||||
356 | unsigned DesigIdx, | ||||||
357 | QualType &CurrentObjectType, | ||||||
358 | RecordDecl::field_iterator *NextField, | ||||||
359 | llvm::APSInt *NextElementIndex, | ||||||
360 | unsigned &Index, | ||||||
361 | InitListExpr *StructuredList, | ||||||
362 | unsigned &StructuredIndex, | ||||||
363 | bool FinishSubobjectInit, | ||||||
364 | bool TopLevelObject); | ||||||
365 | InitListExpr *getStructuredSubobjectInit(InitListExpr *IList, unsigned Index, | ||||||
366 | QualType CurrentObjectType, | ||||||
367 | InitListExpr *StructuredList, | ||||||
368 | unsigned StructuredIndex, | ||||||
369 | SourceRange InitRange, | ||||||
370 | bool IsFullyOverwritten = false); | ||||||
371 | void UpdateStructuredListElement(InitListExpr *StructuredList, | ||||||
372 | unsigned &StructuredIndex, | ||||||
373 | Expr *expr); | ||||||
374 | InitListExpr *createInitListExpr(QualType CurrentObjectType, | ||||||
375 | SourceRange InitRange, | ||||||
376 | unsigned ExpectedNumInits); | ||||||
377 | int numArrayElements(QualType DeclType); | ||||||
378 | int numStructUnionElements(QualType DeclType); | ||||||
379 | |||||||
380 | ExprResult PerformEmptyInit(SourceLocation Loc, | ||||||
381 | const InitializedEntity &Entity); | ||||||
382 | |||||||
383 | /// Diagnose that OldInit (or part thereof) has been overridden by NewInit. | ||||||
384 | void diagnoseInitOverride(Expr *OldInit, SourceRange NewInitRange, | ||||||
385 | bool FullyOverwritten = true) { | ||||||
386 | // Overriding an initializer via a designator is valid with C99 designated | ||||||
387 | // initializers, but ill-formed with C++20 designated initializers. | ||||||
388 | unsigned DiagID = SemaRef.getLangOpts().CPlusPlus | ||||||
389 | ? diag::ext_initializer_overrides | ||||||
390 | : diag::warn_initializer_overrides; | ||||||
391 | |||||||
392 | if (InOverloadResolution && SemaRef.getLangOpts().CPlusPlus) { | ||||||
393 | // In overload resolution, we have to strictly enforce the rules, and so | ||||||
394 | // don't allow any overriding of prior initializers. This matters for a | ||||||
395 | // case such as: | ||||||
396 | // | ||||||
397 | // union U { int a, b; }; | ||||||
398 | // struct S { int a, b; }; | ||||||
399 | // void f(U), f(S); | ||||||
400 | // | ||||||
401 | // Here, f({.a = 1, .b = 2}) is required to call the struct overload. For | ||||||
402 | // consistency, we disallow all overriding of prior initializers in | ||||||
403 | // overload resolution, not only overriding of union members. | ||||||
404 | hadError = true; | ||||||
405 | } else if (OldInit->getType().isDestructedType() && !FullyOverwritten) { | ||||||
406 | // If we'll be keeping around the old initializer but overwriting part of | ||||||
407 | // the object it initialized, and that object is not trivially | ||||||
408 | // destructible, this can leak. Don't allow that, not even as an | ||||||
409 | // extension. | ||||||
410 | // | ||||||
411 | // FIXME: It might be reasonable to allow this in cases where the part of | ||||||
412 | // the initializer that we're overriding has trivial destruction. | ||||||
413 | DiagID = diag::err_initializer_overrides_destructed; | ||||||
414 | } else if (!OldInit->getSourceRange().isValid()) { | ||||||
415 | // We need to check on source range validity because the previous | ||||||
416 | // initializer does not have to be an explicit initializer. e.g., | ||||||
417 | // | ||||||
418 | // struct P { int a, b; }; | ||||||
419 | // struct PP { struct P p } l = { { .a = 2 }, .p.b = 3 }; | ||||||
420 | // | ||||||
421 | // There is an overwrite taking place because the first braced initializer | ||||||
422 | // list "{ .a = 2 }" already provides value for .p.b (which is zero). | ||||||
423 | // | ||||||
424 | // Such overwrites are harmless, so we don't diagnose them. (Note that in | ||||||
425 | // C++, this cannot be reached unless we've already seen and diagnosed a | ||||||
426 | // different conformance issue, such as a mixture of designated and | ||||||
427 | // non-designated initializers or a multi-level designator.) | ||||||
428 | return; | ||||||
429 | } | ||||||
430 | |||||||
431 | if (!VerifyOnly) { | ||||||
432 | SemaRef.Diag(NewInitRange.getBegin(), DiagID) | ||||||
433 | << NewInitRange << FullyOverwritten << OldInit->getType(); | ||||||
434 | SemaRef.Diag(OldInit->getBeginLoc(), diag::note_previous_initializer) | ||||||
435 | << (OldInit->HasSideEffects(SemaRef.Context) && FullyOverwritten) | ||||||
436 | << OldInit->getSourceRange(); | ||||||
437 | } | ||||||
438 | } | ||||||
439 | |||||||
440 | // Explanation on the "FillWithNoInit" mode: | ||||||
441 | // | ||||||
442 | // Assume we have the following definitions (Case#1): | ||||||
443 | // struct P { char x[6][6]; } xp = { .x[1] = "bar" }; | ||||||
444 | // struct PP { struct P lp; } l = { .lp = xp, .lp.x[1][2] = 'f' }; | ||||||
445 | // | ||||||
446 | // l.lp.x[1][0..1] should not be filled with implicit initializers because the | ||||||
447 | // "base" initializer "xp" will provide values for them; l.lp.x[1] will be "baf". | ||||||
448 | // | ||||||
449 | // But if we have (Case#2): | ||||||
450 | // struct PP l = { .lp = xp, .lp.x[1] = { [2] = 'f' } }; | ||||||
451 | // | ||||||
452 | // l.lp.x[1][0..1] are implicitly initialized and do not use values from the | ||||||
453 | // "base" initializer; l.lp.x[1] will be "\0\0f\0\0\0". | ||||||
454 | // | ||||||
455 | // To distinguish Case#1 from Case#2, and also to avoid leaving many "holes" | ||||||
456 | // in the InitListExpr, the "holes" in Case#1 are filled not with empty | ||||||
457 | // initializers but with special "NoInitExpr" place holders, which tells the | ||||||
458 | // CodeGen not to generate any initializers for these parts. | ||||||
459 | void FillInEmptyInitForBase(unsigned Init, const CXXBaseSpecifier &Base, | ||||||
460 | const InitializedEntity &ParentEntity, | ||||||
461 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||||
462 | bool FillWithNoInit); | ||||||
463 | void FillInEmptyInitForField(unsigned Init, FieldDecl *Field, | ||||||
464 | const InitializedEntity &ParentEntity, | ||||||
465 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||||
466 | bool FillWithNoInit = false); | ||||||
467 | void FillInEmptyInitializations(const InitializedEntity &Entity, | ||||||
468 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||||
469 | InitListExpr *OuterILE, unsigned OuterIndex, | ||||||
470 | bool FillWithNoInit = false); | ||||||
471 | bool CheckFlexibleArrayInit(const InitializedEntity &Entity, | ||||||
472 | Expr *InitExpr, FieldDecl *Field, | ||||||
473 | bool TopLevelObject); | ||||||
474 | void CheckEmptyInitializable(const InitializedEntity &Entity, | ||||||
475 | SourceLocation Loc); | ||||||
476 | |||||||
477 | public: | ||||||
478 | InitListChecker(Sema &S, const InitializedEntity &Entity, InitListExpr *IL, | ||||||
479 | QualType &T, bool VerifyOnly, bool TreatUnavailableAsInvalid, | ||||||
480 | bool InOverloadResolution = false); | ||||||
481 | bool HadError() { return hadError; } | ||||||
482 | |||||||
483 | // Retrieves the fully-structured initializer list used for | ||||||
484 | // semantic analysis and code generation. | ||||||
485 | InitListExpr *getFullyStructuredList() const { return FullyStructuredList; } | ||||||
486 | }; | ||||||
487 | |||||||
488 | } // end anonymous namespace | ||||||
489 | |||||||
490 | ExprResult InitListChecker::PerformEmptyInit(SourceLocation Loc, | ||||||
491 | const InitializedEntity &Entity) { | ||||||
492 | InitializationKind Kind = InitializationKind::CreateValue(Loc, Loc, Loc, | ||||||
493 | true); | ||||||
494 | MultiExprArg SubInit; | ||||||
495 | Expr *InitExpr; | ||||||
496 | InitListExpr DummyInitList(SemaRef.Context, Loc, None, Loc); | ||||||
497 | |||||||
498 | // C++ [dcl.init.aggr]p7: | ||||||
499 | // If there are fewer initializer-clauses in the list than there are | ||||||
500 | // members in the aggregate, then each member not explicitly initialized | ||||||
501 | // ... | ||||||
502 | bool EmptyInitList = SemaRef.getLangOpts().CPlusPlus11 && | ||||||
503 | Entity.getType()->getBaseElementTypeUnsafe()->isRecordType(); | ||||||
504 | if (EmptyInitList) { | ||||||
505 | // C++1y / DR1070: | ||||||
506 | // shall be initialized [...] from an empty initializer list. | ||||||
507 | // | ||||||
508 | // We apply the resolution of this DR to C++11 but not C++98, since C++98 | ||||||
509 | // does not have useful semantics for initialization from an init list. | ||||||
510 | // We treat this as copy-initialization, because aggregate initialization | ||||||
511 | // always performs copy-initialization on its elements. | ||||||
512 | // | ||||||
513 | // Only do this if we're initializing a class type, to avoid filling in | ||||||
514 | // the initializer list where possible. | ||||||
515 | InitExpr = VerifyOnly ? &DummyInitList : new (SemaRef.Context) | ||||||
516 | InitListExpr(SemaRef.Context, Loc, None, Loc); | ||||||
517 | InitExpr->setType(SemaRef.Context.VoidTy); | ||||||
518 | SubInit = InitExpr; | ||||||
519 | Kind = InitializationKind::CreateCopy(Loc, Loc); | ||||||
520 | } else { | ||||||
521 | // C++03: | ||||||
522 | // shall be value-initialized. | ||||||
523 | } | ||||||
524 | |||||||
525 | InitializationSequence InitSeq(SemaRef, Entity, Kind, SubInit); | ||||||
526 | // libstdc++4.6 marks the vector default constructor as explicit in | ||||||
527 | // _GLIBCXX_DEBUG mode, so recover using the C++03 logic in that case. | ||||||
528 | // stlport does so too. Look for std::__debug for libstdc++, and for | ||||||
529 | // std:: for stlport. This is effectively a compiler-side implementation of | ||||||
530 | // LWG2193. | ||||||
531 | if (!InitSeq && EmptyInitList && InitSeq.getFailureKind() == | ||||||
532 | InitializationSequence::FK_ExplicitConstructor) { | ||||||
533 | OverloadCandidateSet::iterator Best; | ||||||
534 | OverloadingResult O = | ||||||
535 | InitSeq.getFailedCandidateSet() | ||||||
536 | .BestViableFunction(SemaRef, Kind.getLocation(), Best); | ||||||
537 | (void)O; | ||||||
538 | assert(O == OR_Success && "Inconsistent overload resolution")(static_cast <bool> (O == OR_Success && "Inconsistent overload resolution" ) ? void (0) : __assert_fail ("O == OR_Success && \"Inconsistent overload resolution\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 538, __extension__ __PRETTY_FUNCTION__)); | ||||||
539 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||||
540 | CXXRecordDecl *R = CtorDecl->getParent(); | ||||||
541 | |||||||
542 | if (CtorDecl->getMinRequiredArguments() == 0 && | ||||||
543 | CtorDecl->isExplicit() && R->getDeclName() && | ||||||
544 | SemaRef.SourceMgr.isInSystemHeader(CtorDecl->getLocation())) { | ||||||
545 | bool IsInStd = false; | ||||||
546 | for (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(R->getDeclContext()); | ||||||
547 | ND && !IsInStd; ND = dyn_cast<NamespaceDecl>(ND->getParent())) { | ||||||
548 | if (SemaRef.getStdNamespace()->InEnclosingNamespaceSetOf(ND)) | ||||||
549 | IsInStd = true; | ||||||
550 | } | ||||||
551 | |||||||
552 | if (IsInStd && llvm::StringSwitch<bool>(R->getName()) | ||||||
553 | .Cases("basic_string", "deque", "forward_list", true) | ||||||
554 | .Cases("list", "map", "multimap", "multiset", true) | ||||||
555 | .Cases("priority_queue", "queue", "set", "stack", true) | ||||||
556 | .Cases("unordered_map", "unordered_set", "vector", true) | ||||||
557 | .Default(false)) { | ||||||
558 | InitSeq.InitializeFrom( | ||||||
559 | SemaRef, Entity, | ||||||
560 | InitializationKind::CreateValue(Loc, Loc, Loc, true), | ||||||
561 | MultiExprArg(), /*TopLevelOfInitList=*/false, | ||||||
562 | TreatUnavailableAsInvalid); | ||||||
563 | // Emit a warning for this. System header warnings aren't shown | ||||||
564 | // by default, but people working on system headers should see it. | ||||||
565 | if (!VerifyOnly) { | ||||||
566 | SemaRef.Diag(CtorDecl->getLocation(), | ||||||
567 | diag::warn_invalid_initializer_from_system_header); | ||||||
568 | if (Entity.getKind() == InitializedEntity::EK_Member) | ||||||
569 | SemaRef.Diag(Entity.getDecl()->getLocation(), | ||||||
570 | diag::note_used_in_initialization_here); | ||||||
571 | else if (Entity.getKind() == InitializedEntity::EK_ArrayElement) | ||||||
572 | SemaRef.Diag(Loc, diag::note_used_in_initialization_here); | ||||||
573 | } | ||||||
574 | } | ||||||
575 | } | ||||||
576 | } | ||||||
577 | if (!InitSeq) { | ||||||
578 | if (!VerifyOnly) { | ||||||
579 | InitSeq.Diagnose(SemaRef, Entity, Kind, SubInit); | ||||||
580 | if (Entity.getKind() == InitializedEntity::EK_Member) | ||||||
581 | SemaRef.Diag(Entity.getDecl()->getLocation(), | ||||||
582 | diag::note_in_omitted_aggregate_initializer) | ||||||
583 | << /*field*/1 << Entity.getDecl(); | ||||||
584 | else if (Entity.getKind() == InitializedEntity::EK_ArrayElement) { | ||||||
585 | bool IsTrailingArrayNewMember = | ||||||
586 | Entity.getParent() && | ||||||
587 | Entity.getParent()->isVariableLengthArrayNew(); | ||||||
588 | SemaRef.Diag(Loc, diag::note_in_omitted_aggregate_initializer) | ||||||
589 | << (IsTrailingArrayNewMember ? 2 : /*array element*/0) | ||||||
590 | << Entity.getElementIndex(); | ||||||
591 | } | ||||||
592 | } | ||||||
593 | hadError = true; | ||||||
594 | return ExprError(); | ||||||
595 | } | ||||||
596 | |||||||
597 | return VerifyOnly ? ExprResult() | ||||||
598 | : InitSeq.Perform(SemaRef, Entity, Kind, SubInit); | ||||||
599 | } | ||||||
600 | |||||||
601 | void InitListChecker::CheckEmptyInitializable(const InitializedEntity &Entity, | ||||||
602 | SourceLocation Loc) { | ||||||
603 | // If we're building a fully-structured list, we'll check this at the end | ||||||
604 | // once we know which elements are actually initialized. Otherwise, we know | ||||||
605 | // that there are no designators so we can just check now. | ||||||
606 | if (FullyStructuredList) | ||||||
607 | return; | ||||||
608 | PerformEmptyInit(Loc, Entity); | ||||||
609 | } | ||||||
610 | |||||||
611 | void InitListChecker::FillInEmptyInitForBase( | ||||||
612 | unsigned Init, const CXXBaseSpecifier &Base, | ||||||
613 | const InitializedEntity &ParentEntity, InitListExpr *ILE, | ||||||
614 | bool &RequiresSecondPass, bool FillWithNoInit) { | ||||||
615 | InitializedEntity BaseEntity = InitializedEntity::InitializeBase( | ||||||
616 | SemaRef.Context, &Base, false, &ParentEntity); | ||||||
617 | |||||||
618 | if (Init >= ILE->getNumInits() || !ILE->getInit(Init)) { | ||||||
619 | ExprResult BaseInit = FillWithNoInit | ||||||
620 | ? new (SemaRef.Context) NoInitExpr(Base.getType()) | ||||||
621 | : PerformEmptyInit(ILE->getEndLoc(), BaseEntity); | ||||||
622 | if (BaseInit.isInvalid()) { | ||||||
623 | hadError = true; | ||||||
624 | return; | ||||||
625 | } | ||||||
626 | |||||||
627 | if (!VerifyOnly) { | ||||||
628 | assert(Init < ILE->getNumInits() && "should have been expanded")(static_cast <bool> (Init < ILE->getNumInits() && "should have been expanded") ? void (0) : __assert_fail ("Init < ILE->getNumInits() && \"should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 628, __extension__ __PRETTY_FUNCTION__)); | ||||||
629 | ILE->setInit(Init, BaseInit.getAs<Expr>()); | ||||||
630 | } | ||||||
631 | } else if (InitListExpr *InnerILE = | ||||||
632 | dyn_cast<InitListExpr>(ILE->getInit(Init))) { | ||||||
633 | FillInEmptyInitializations(BaseEntity, InnerILE, RequiresSecondPass, | ||||||
634 | ILE, Init, FillWithNoInit); | ||||||
635 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||||
636 | dyn_cast<DesignatedInitUpdateExpr>(ILE->getInit(Init))) { | ||||||
637 | FillInEmptyInitializations(BaseEntity, InnerDIUE->getUpdater(), | ||||||
638 | RequiresSecondPass, ILE, Init, | ||||||
639 | /*FillWithNoInit =*/true); | ||||||
640 | } | ||||||
641 | } | ||||||
642 | |||||||
643 | void InitListChecker::FillInEmptyInitForField(unsigned Init, FieldDecl *Field, | ||||||
644 | const InitializedEntity &ParentEntity, | ||||||
645 | InitListExpr *ILE, | ||||||
646 | bool &RequiresSecondPass, | ||||||
647 | bool FillWithNoInit) { | ||||||
648 | SourceLocation Loc = ILE->getEndLoc(); | ||||||
649 | unsigned NumInits = ILE->getNumInits(); | ||||||
650 | InitializedEntity MemberEntity | ||||||
651 | = InitializedEntity::InitializeMember(Field, &ParentEntity); | ||||||
652 | |||||||
653 | if (Init >= NumInits || !ILE->getInit(Init)) { | ||||||
654 | if (const RecordType *RType = ILE->getType()->getAs<RecordType>()) | ||||||
655 | if (!RType->getDecl()->isUnion()) | ||||||
656 | assert((Init < NumInits || VerifyOnly) &&(static_cast <bool> ((Init < NumInits || VerifyOnly) && "This ILE should have been expanded") ? void (0) : __assert_fail ("(Init < NumInits || VerifyOnly) && \"This ILE should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 657, __extension__ __PRETTY_FUNCTION__)) | ||||||
657 | "This ILE should have been expanded")(static_cast <bool> ((Init < NumInits || VerifyOnly) && "This ILE should have been expanded") ? void (0) : __assert_fail ("(Init < NumInits || VerifyOnly) && \"This ILE should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 657, __extension__ __PRETTY_FUNCTION__)); | ||||||
658 | |||||||
659 | if (FillWithNoInit) { | ||||||
660 | assert(!VerifyOnly && "should not fill with no-init in verify-only mode")(static_cast <bool> (!VerifyOnly && "should not fill with no-init in verify-only mode" ) ? void (0) : __assert_fail ("!VerifyOnly && \"should not fill with no-init in verify-only mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 660, __extension__ __PRETTY_FUNCTION__)); | ||||||
661 | Expr *Filler = new (SemaRef.Context) NoInitExpr(Field->getType()); | ||||||
662 | if (Init < NumInits) | ||||||
663 | ILE->setInit(Init, Filler); | ||||||
664 | else | ||||||
665 | ILE->updateInit(SemaRef.Context, Init, Filler); | ||||||
666 | return; | ||||||
667 | } | ||||||
668 | // C++1y [dcl.init.aggr]p7: | ||||||
669 | // If there are fewer initializer-clauses in the list than there are | ||||||
670 | // members in the aggregate, then each member not explicitly initialized | ||||||
671 | // shall be initialized from its brace-or-equal-initializer [...] | ||||||
672 | if (Field->hasInClassInitializer()) { | ||||||
673 | if (VerifyOnly) | ||||||
674 | return; | ||||||
675 | |||||||
676 | ExprResult DIE = SemaRef.BuildCXXDefaultInitExpr(Loc, Field); | ||||||
677 | if (DIE.isInvalid()) { | ||||||
678 | hadError = true; | ||||||
679 | return; | ||||||
680 | } | ||||||
681 | SemaRef.checkInitializerLifetime(MemberEntity, DIE.get()); | ||||||
682 | if (Init < NumInits) | ||||||
683 | ILE->setInit(Init, DIE.get()); | ||||||
684 | else { | ||||||
685 | ILE->updateInit(SemaRef.Context, Init, DIE.get()); | ||||||
686 | RequiresSecondPass = true; | ||||||
687 | } | ||||||
688 | return; | ||||||
689 | } | ||||||
690 | |||||||
691 | if (Field->getType()->isReferenceType()) { | ||||||
692 | if (!VerifyOnly) { | ||||||
693 | // C++ [dcl.init.aggr]p9: | ||||||
694 | // If an incomplete or empty initializer-list leaves a | ||||||
695 | // member of reference type uninitialized, the program is | ||||||
696 | // ill-formed. | ||||||
697 | SemaRef.Diag(Loc, diag::err_init_reference_member_uninitialized) | ||||||
698 | << Field->getType() | ||||||
699 | << ILE->getSyntacticForm()->getSourceRange(); | ||||||
700 | SemaRef.Diag(Field->getLocation(), | ||||||
701 | diag::note_uninit_reference_member); | ||||||
702 | } | ||||||
703 | hadError = true; | ||||||
704 | return; | ||||||
705 | } | ||||||
706 | |||||||
707 | ExprResult MemberInit = PerformEmptyInit(Loc, MemberEntity); | ||||||
708 | if (MemberInit.isInvalid()) { | ||||||
709 | hadError = true; | ||||||
710 | return; | ||||||
711 | } | ||||||
712 | |||||||
713 | if (hadError || VerifyOnly) { | ||||||
714 | // Do nothing | ||||||
715 | } else if (Init < NumInits) { | ||||||
716 | ILE->setInit(Init, MemberInit.getAs<Expr>()); | ||||||
717 | } else if (!isa<ImplicitValueInitExpr>(MemberInit.get())) { | ||||||
718 | // Empty initialization requires a constructor call, so | ||||||
719 | // extend the initializer list to include the constructor | ||||||
720 | // call and make a note that we'll need to take another pass | ||||||
721 | // through the initializer list. | ||||||
722 | ILE->updateInit(SemaRef.Context, Init, MemberInit.getAs<Expr>()); | ||||||
723 | RequiresSecondPass = true; | ||||||
724 | } | ||||||
725 | } else if (InitListExpr *InnerILE | ||||||
726 | = dyn_cast<InitListExpr>(ILE->getInit(Init))) { | ||||||
727 | FillInEmptyInitializations(MemberEntity, InnerILE, | ||||||
728 | RequiresSecondPass, ILE, Init, FillWithNoInit); | ||||||
729 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||||
730 | dyn_cast<DesignatedInitUpdateExpr>(ILE->getInit(Init))) { | ||||||
731 | FillInEmptyInitializations(MemberEntity, InnerDIUE->getUpdater(), | ||||||
732 | RequiresSecondPass, ILE, Init, | ||||||
733 | /*FillWithNoInit =*/true); | ||||||
734 | } | ||||||
735 | } | ||||||
736 | |||||||
737 | /// Recursively replaces NULL values within the given initializer list | ||||||
738 | /// with expressions that perform value-initialization of the | ||||||
739 | /// appropriate type, and finish off the InitListExpr formation. | ||||||
740 | void | ||||||
741 | InitListChecker::FillInEmptyInitializations(const InitializedEntity &Entity, | ||||||
742 | InitListExpr *ILE, | ||||||
743 | bool &RequiresSecondPass, | ||||||
744 | InitListExpr *OuterILE, | ||||||
745 | unsigned OuterIndex, | ||||||
746 | bool FillWithNoInit) { | ||||||
747 | assert((ILE->getType() != SemaRef.Context.VoidTy) &&(static_cast <bool> ((ILE->getType() != SemaRef.Context .VoidTy) && "Should not have void type") ? void (0) : __assert_fail ("(ILE->getType() != SemaRef.Context.VoidTy) && \"Should not have void type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 748, __extension__ __PRETTY_FUNCTION__)) | ||||||
748 | "Should not have void type")(static_cast <bool> ((ILE->getType() != SemaRef.Context .VoidTy) && "Should not have void type") ? void (0) : __assert_fail ("(ILE->getType() != SemaRef.Context.VoidTy) && \"Should not have void type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 748, __extension__ __PRETTY_FUNCTION__)); | ||||||
749 | |||||||
750 | // We don't need to do any checks when just filling NoInitExprs; that can't | ||||||
751 | // fail. | ||||||
752 | if (FillWithNoInit && VerifyOnly) | ||||||
753 | return; | ||||||
754 | |||||||
755 | // If this is a nested initializer list, we might have changed its contents | ||||||
756 | // (and therefore some of its properties, such as instantiation-dependence) | ||||||
757 | // while filling it in. Inform the outer initializer list so that its state | ||||||
758 | // can be updated to match. | ||||||
759 | // FIXME: We should fully build the inner initializers before constructing | ||||||
760 | // the outer InitListExpr instead of mutating AST nodes after they have | ||||||
761 | // been used as subexpressions of other nodes. | ||||||
762 | struct UpdateOuterILEWithUpdatedInit { | ||||||
763 | InitListExpr *Outer; | ||||||
764 | unsigned OuterIndex; | ||||||
765 | ~UpdateOuterILEWithUpdatedInit() { | ||||||
766 | if (Outer) | ||||||
767 | Outer->setInit(OuterIndex, Outer->getInit(OuterIndex)); | ||||||
768 | } | ||||||
769 | } UpdateOuterRAII = {OuterILE, OuterIndex}; | ||||||
770 | |||||||
771 | // A transparent ILE is not performing aggregate initialization and should | ||||||
772 | // not be filled in. | ||||||
773 | if (ILE->isTransparent()) | ||||||
774 | return; | ||||||
775 | |||||||
776 | if (const RecordType *RType = ILE->getType()->getAs<RecordType>()) { | ||||||
777 | const RecordDecl *RDecl = RType->getDecl(); | ||||||
778 | if (RDecl->isUnion() && ILE->getInitializedFieldInUnion()) | ||||||
779 | FillInEmptyInitForField(0, ILE->getInitializedFieldInUnion(), | ||||||
780 | Entity, ILE, RequiresSecondPass, FillWithNoInit); | ||||||
781 | else if (RDecl->isUnion() && isa<CXXRecordDecl>(RDecl) && | ||||||
782 | cast<CXXRecordDecl>(RDecl)->hasInClassInitializer()) { | ||||||
783 | for (auto *Field : RDecl->fields()) { | ||||||
784 | if (Field->hasInClassInitializer()) { | ||||||
785 | FillInEmptyInitForField(0, Field, Entity, ILE, RequiresSecondPass, | ||||||
786 | FillWithNoInit); | ||||||
787 | break; | ||||||
788 | } | ||||||
789 | } | ||||||
790 | } else { | ||||||
791 | // The fields beyond ILE->getNumInits() are default initialized, so in | ||||||
792 | // order to leave them uninitialized, the ILE is expanded and the extra | ||||||
793 | // fields are then filled with NoInitExpr. | ||||||
794 | unsigned NumElems = numStructUnionElements(ILE->getType()); | ||||||
795 | if (RDecl->hasFlexibleArrayMember()) | ||||||
796 | ++NumElems; | ||||||
797 | if (!VerifyOnly && ILE->getNumInits() < NumElems) | ||||||
798 | ILE->resizeInits(SemaRef.Context, NumElems); | ||||||
799 | |||||||
800 | unsigned Init = 0; | ||||||
801 | |||||||
802 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RDecl)) { | ||||||
803 | for (auto &Base : CXXRD->bases()) { | ||||||
804 | if (hadError) | ||||||
805 | return; | ||||||
806 | |||||||
807 | FillInEmptyInitForBase(Init, Base, Entity, ILE, RequiresSecondPass, | ||||||
808 | FillWithNoInit); | ||||||
809 | ++Init; | ||||||
810 | } | ||||||
811 | } | ||||||
812 | |||||||
813 | for (auto *Field : RDecl->fields()) { | ||||||
814 | if (Field->isUnnamedBitfield()) | ||||||
815 | continue; | ||||||
816 | |||||||
817 | if (hadError) | ||||||
818 | return; | ||||||
819 | |||||||
820 | FillInEmptyInitForField(Init, Field, Entity, ILE, RequiresSecondPass, | ||||||
821 | FillWithNoInit); | ||||||
822 | if (hadError) | ||||||
823 | return; | ||||||
824 | |||||||
825 | ++Init; | ||||||
826 | |||||||
827 | // Only look at the first initialization of a union. | ||||||
828 | if (RDecl->isUnion()) | ||||||
829 | break; | ||||||
830 | } | ||||||
831 | } | ||||||
832 | |||||||
833 | return; | ||||||
834 | } | ||||||
835 | |||||||
836 | QualType ElementType; | ||||||
837 | |||||||
838 | InitializedEntity ElementEntity = Entity; | ||||||
839 | unsigned NumInits = ILE->getNumInits(); | ||||||
840 | unsigned NumElements = NumInits; | ||||||
841 | if (const ArrayType *AType = SemaRef.Context.getAsArrayType(ILE->getType())) { | ||||||
842 | ElementType = AType->getElementType(); | ||||||
843 | if (const auto *CAType = dyn_cast<ConstantArrayType>(AType)) | ||||||
844 | NumElements = CAType->getSize().getZExtValue(); | ||||||
845 | // For an array new with an unknown bound, ask for one additional element | ||||||
846 | // in order to populate the array filler. | ||||||
847 | if (Entity.isVariableLengthArrayNew()) | ||||||
848 | ++NumElements; | ||||||
849 | ElementEntity = InitializedEntity::InitializeElement(SemaRef.Context, | ||||||
850 | 0, Entity); | ||||||
851 | } else if (const VectorType *VType = ILE->getType()->getAs<VectorType>()) { | ||||||
852 | ElementType = VType->getElementType(); | ||||||
853 | NumElements = VType->getNumElements(); | ||||||
854 | ElementEntity = InitializedEntity::InitializeElement(SemaRef.Context, | ||||||
855 | 0, Entity); | ||||||
856 | } else | ||||||
857 | ElementType = ILE->getType(); | ||||||
858 | |||||||
859 | bool SkipEmptyInitChecks = false; | ||||||
860 | for (unsigned Init = 0; Init != NumElements; ++Init) { | ||||||
861 | if (hadError) | ||||||
862 | return; | ||||||
863 | |||||||
864 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement || | ||||||
865 | ElementEntity.getKind() == InitializedEntity::EK_VectorElement) | ||||||
866 | ElementEntity.setElementIndex(Init); | ||||||
867 | |||||||
868 | if (Init >= NumInits && (ILE->hasArrayFiller() || SkipEmptyInitChecks)) | ||||||
869 | return; | ||||||
870 | |||||||
871 | Expr *InitExpr = (Init < NumInits ? ILE->getInit(Init) : nullptr); | ||||||
872 | if (!InitExpr && Init < NumInits && ILE->hasArrayFiller()) | ||||||
873 | ILE->setInit(Init, ILE->getArrayFiller()); | ||||||
874 | else if (!InitExpr && !ILE->hasArrayFiller()) { | ||||||
875 | // In VerifyOnly mode, there's no point performing empty initialization | ||||||
876 | // more than once. | ||||||
877 | if (SkipEmptyInitChecks) | ||||||
878 | continue; | ||||||
879 | |||||||
880 | Expr *Filler = nullptr; | ||||||
881 | |||||||
882 | if (FillWithNoInit) | ||||||
883 | Filler = new (SemaRef.Context) NoInitExpr(ElementType); | ||||||
884 | else { | ||||||
885 | ExprResult ElementInit = | ||||||
886 | PerformEmptyInit(ILE->getEndLoc(), ElementEntity); | ||||||
887 | if (ElementInit.isInvalid()) { | ||||||
888 | hadError = true; | ||||||
889 | return; | ||||||
890 | } | ||||||
891 | |||||||
892 | Filler = ElementInit.getAs<Expr>(); | ||||||
893 | } | ||||||
894 | |||||||
895 | if (hadError) { | ||||||
896 | // Do nothing | ||||||
897 | } else if (VerifyOnly) { | ||||||
898 | SkipEmptyInitChecks = true; | ||||||
899 | } else if (Init < NumInits) { | ||||||
900 | // For arrays, just set the expression used for value-initialization | ||||||
901 | // of the "holes" in the array. | ||||||
902 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement) | ||||||
903 | ILE->setArrayFiller(Filler); | ||||||
904 | else | ||||||
905 | ILE->setInit(Init, Filler); | ||||||
906 | } else { | ||||||
907 | // For arrays, just set the expression used for value-initialization | ||||||
908 | // of the rest of elements and exit. | ||||||
909 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement) { | ||||||
910 | ILE->setArrayFiller(Filler); | ||||||
911 | return; | ||||||
912 | } | ||||||
913 | |||||||
914 | if (!isa<ImplicitValueInitExpr>(Filler) && !isa<NoInitExpr>(Filler)) { | ||||||
915 | // Empty initialization requires a constructor call, so | ||||||
916 | // extend the initializer list to include the constructor | ||||||
917 | // call and make a note that we'll need to take another pass | ||||||
918 | // through the initializer list. | ||||||
919 | ILE->updateInit(SemaRef.Context, Init, Filler); | ||||||
920 | RequiresSecondPass = true; | ||||||
921 | } | ||||||
922 | } | ||||||
923 | } else if (InitListExpr *InnerILE | ||||||
924 | = dyn_cast_or_null<InitListExpr>(InitExpr)) { | ||||||
925 | FillInEmptyInitializations(ElementEntity, InnerILE, RequiresSecondPass, | ||||||
926 | ILE, Init, FillWithNoInit); | ||||||
927 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||||
928 | dyn_cast_or_null<DesignatedInitUpdateExpr>(InitExpr)) { | ||||||
929 | FillInEmptyInitializations(ElementEntity, InnerDIUE->getUpdater(), | ||||||
930 | RequiresSecondPass, ILE, Init, | ||||||
931 | /*FillWithNoInit =*/true); | ||||||
932 | } | ||||||
933 | } | ||||||
934 | } | ||||||
935 | |||||||
936 | static bool hasAnyDesignatedInits(const InitListExpr *IL) { | ||||||
937 | for (const Stmt *Init : *IL) | ||||||
938 | if (Init && isa<DesignatedInitExpr>(Init)) | ||||||
939 | return true; | ||||||
940 | return false; | ||||||
941 | } | ||||||
942 | |||||||
943 | InitListChecker::InitListChecker(Sema &S, const InitializedEntity &Entity, | ||||||
944 | InitListExpr *IL, QualType &T, bool VerifyOnly, | ||||||
945 | bool TreatUnavailableAsInvalid, | ||||||
946 | bool InOverloadResolution) | ||||||
947 | : SemaRef(S), VerifyOnly(VerifyOnly), | ||||||
948 | TreatUnavailableAsInvalid(TreatUnavailableAsInvalid), | ||||||
949 | InOverloadResolution(InOverloadResolution) { | ||||||
950 | if (!VerifyOnly || hasAnyDesignatedInits(IL)) { | ||||||
951 | FullyStructuredList = | ||||||
952 | createInitListExpr(T, IL->getSourceRange(), IL->getNumInits()); | ||||||
953 | |||||||
954 | // FIXME: Check that IL isn't already the semantic form of some other | ||||||
955 | // InitListExpr. If it is, we'd create a broken AST. | ||||||
956 | if (!VerifyOnly) | ||||||
957 | FullyStructuredList->setSyntacticForm(IL); | ||||||
958 | } | ||||||
959 | |||||||
960 | CheckExplicitInitList(Entity, IL, T, FullyStructuredList, | ||||||
961 | /*TopLevelObject=*/true); | ||||||
962 | |||||||
963 | if (!hadError && FullyStructuredList) { | ||||||
964 | bool RequiresSecondPass = false; | ||||||
965 | FillInEmptyInitializations(Entity, FullyStructuredList, RequiresSecondPass, | ||||||
966 | /*OuterILE=*/nullptr, /*OuterIndex=*/0); | ||||||
967 | if (RequiresSecondPass && !hadError) | ||||||
968 | FillInEmptyInitializations(Entity, FullyStructuredList, | ||||||
969 | RequiresSecondPass, nullptr, 0); | ||||||
970 | } | ||||||
971 | if (hadError && FullyStructuredList) | ||||||
972 | FullyStructuredList->markError(); | ||||||
973 | } | ||||||
974 | |||||||
975 | int InitListChecker::numArrayElements(QualType DeclType) { | ||||||
976 | // FIXME: use a proper constant | ||||||
977 | int maxElements = 0x7FFFFFFF; | ||||||
978 | if (const ConstantArrayType *CAT = | ||||||
979 | SemaRef.Context.getAsConstantArrayType(DeclType)) { | ||||||
980 | maxElements = static_cast<int>(CAT->getSize().getZExtValue()); | ||||||
981 | } | ||||||
982 | return maxElements; | ||||||
983 | } | ||||||
984 | |||||||
985 | int InitListChecker::numStructUnionElements(QualType DeclType) { | ||||||
986 | RecordDecl *structDecl = DeclType->castAs<RecordType>()->getDecl(); | ||||||
987 | int InitializableMembers = 0; | ||||||
988 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(structDecl)) | ||||||
989 | InitializableMembers += CXXRD->getNumBases(); | ||||||
990 | for (const auto *Field : structDecl->fields()) | ||||||
991 | if (!Field->isUnnamedBitfield()) | ||||||
992 | ++InitializableMembers; | ||||||
993 | |||||||
994 | if (structDecl->isUnion()) | ||||||
995 | return std::min(InitializableMembers, 1); | ||||||
996 | return InitializableMembers - structDecl->hasFlexibleArrayMember(); | ||||||
997 | } | ||||||
998 | |||||||
999 | /// Determine whether Entity is an entity for which it is idiomatic to elide | ||||||
1000 | /// the braces in aggregate initialization. | ||||||
1001 | static bool isIdiomaticBraceElisionEntity(const InitializedEntity &Entity) { | ||||||
1002 | // Recursive initialization of the one and only field within an aggregate | ||||||
1003 | // class is considered idiomatic. This case arises in particular for | ||||||
1004 | // initialization of std::array, where the C++ standard suggests the idiom of | ||||||
1005 | // | ||||||
1006 | // std::array<T, N> arr = {1, 2, 3}; | ||||||
1007 | // | ||||||
1008 | // (where std::array is an aggregate struct containing a single array field. | ||||||
1009 | |||||||
1010 | if (!Entity.getParent()) | ||||||
1011 | return false; | ||||||
1012 | |||||||
1013 | // Allows elide brace initialization for aggregates with empty base. | ||||||
1014 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||||
1015 | auto *ParentRD = | ||||||
1016 | Entity.getParent()->getType()->castAs<RecordType>()->getDecl(); | ||||||
1017 | CXXRecordDecl *CXXRD = cast<CXXRecordDecl>(ParentRD); | ||||||
1018 | return CXXRD->getNumBases() == 1 && CXXRD->field_empty(); | ||||||
1019 | } | ||||||
1020 | |||||||
1021 | // Allow brace elision if the only subobject is a field. | ||||||
1022 | if (Entity.getKind() == InitializedEntity::EK_Member) { | ||||||
1023 | auto *ParentRD = | ||||||
1024 | Entity.getParent()->getType()->castAs<RecordType>()->getDecl(); | ||||||
1025 | if (CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(ParentRD)) { | ||||||
1026 | if (CXXRD->getNumBases()) { | ||||||
1027 | return false; | ||||||
1028 | } | ||||||
1029 | } | ||||||
1030 | auto FieldIt = ParentRD->field_begin(); | ||||||
1031 | assert(FieldIt != ParentRD->field_end() &&(static_cast <bool> (FieldIt != ParentRD->field_end( ) && "no fields but have initializer for member?") ? void (0) : __assert_fail ("FieldIt != ParentRD->field_end() && \"no fields but have initializer for member?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)) | ||||||
1032 | "no fields but have initializer for member?")(static_cast <bool> (FieldIt != ParentRD->field_end( ) && "no fields but have initializer for member?") ? void (0) : __assert_fail ("FieldIt != ParentRD->field_end() && \"no fields but have initializer for member?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)); | ||||||
1033 | return ++FieldIt == ParentRD->field_end(); | ||||||
1034 | } | ||||||
1035 | |||||||
1036 | return false; | ||||||
1037 | } | ||||||
1038 | |||||||
1039 | /// Check whether the range of the initializer \p ParentIList from element | ||||||
1040 | /// \p Index onwards can be used to initialize an object of type \p T. Update | ||||||
1041 | /// \p Index to indicate how many elements of the list were consumed. | ||||||
1042 | /// | ||||||
1043 | /// This also fills in \p StructuredList, from element \p StructuredIndex | ||||||
1044 | /// onwards, with the fully-braced, desugared form of the initialization. | ||||||
1045 | void InitListChecker::CheckImplicitInitList(const InitializedEntity &Entity, | ||||||
1046 | InitListExpr *ParentIList, | ||||||
1047 | QualType T, unsigned &Index, | ||||||
1048 | InitListExpr *StructuredList, | ||||||
1049 | unsigned &StructuredIndex) { | ||||||
1050 | int maxElements = 0; | ||||||
1051 | |||||||
1052 | if (T->isArrayType()) | ||||||
1053 | maxElements = numArrayElements(T); | ||||||
1054 | else if (T->isRecordType()) | ||||||
1055 | maxElements = numStructUnionElements(T); | ||||||
1056 | else if (T->isVectorType()) | ||||||
1057 | maxElements = T->castAs<VectorType>()->getNumElements(); | ||||||
1058 | else | ||||||
1059 | llvm_unreachable("CheckImplicitInitList(): Illegal type")::llvm::llvm_unreachable_internal("CheckImplicitInitList(): Illegal type" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1059); | ||||||
1060 | |||||||
1061 | if (maxElements == 0) { | ||||||
1062 | if (!VerifyOnly) | ||||||
1063 | SemaRef.Diag(ParentIList->getInit(Index)->getBeginLoc(), | ||||||
1064 | diag::err_implicit_empty_initializer); | ||||||
1065 | ++Index; | ||||||
1066 | hadError = true; | ||||||
1067 | return; | ||||||
1068 | } | ||||||
1069 | |||||||
1070 | // Build a structured initializer list corresponding to this subobject. | ||||||
1071 | InitListExpr *StructuredSubobjectInitList = getStructuredSubobjectInit( | ||||||
1072 | ParentIList, Index, T, StructuredList, StructuredIndex, | ||||||
1073 | SourceRange(ParentIList->getInit(Index)->getBeginLoc(), | ||||||
1074 | ParentIList->getSourceRange().getEnd())); | ||||||
1075 | unsigned StructuredSubobjectInitIndex = 0; | ||||||
1076 | |||||||
1077 | // Check the element types and build the structural subobject. | ||||||
1078 | unsigned StartIndex = Index; | ||||||
1079 | CheckListElementTypes(Entity, ParentIList, T, | ||||||
1080 | /*SubobjectIsDesignatorContext=*/false, Index, | ||||||
1081 | StructuredSubobjectInitList, | ||||||
1082 | StructuredSubobjectInitIndex); | ||||||
1083 | |||||||
1084 | if (StructuredSubobjectInitList) { | ||||||
1085 | StructuredSubobjectInitList->setType(T); | ||||||
1086 | |||||||
1087 | unsigned EndIndex = (Index == StartIndex? StartIndex : Index - 1); | ||||||
1088 | // Update the structured sub-object initializer so that it's ending | ||||||
1089 | // range corresponds with the end of the last initializer it used. | ||||||
1090 | if (EndIndex < ParentIList->getNumInits() && | ||||||
1091 | ParentIList->getInit(EndIndex)) { | ||||||
1092 | SourceLocation EndLoc | ||||||
1093 | = ParentIList->getInit(EndIndex)->getSourceRange().getEnd(); | ||||||
1094 | StructuredSubobjectInitList->setRBraceLoc(EndLoc); | ||||||
1095 | } | ||||||
1096 | |||||||
1097 | // Complain about missing braces. | ||||||
1098 | if (!VerifyOnly && (T->isArrayType() || T->isRecordType()) && | ||||||
1099 | !ParentIList->isIdiomaticZeroInitializer(SemaRef.getLangOpts()) && | ||||||
1100 | !isIdiomaticBraceElisionEntity(Entity)) { | ||||||
1101 | SemaRef.Diag(StructuredSubobjectInitList->getBeginLoc(), | ||||||
1102 | diag::warn_missing_braces) | ||||||
1103 | << StructuredSubobjectInitList->getSourceRange() | ||||||
1104 | << FixItHint::CreateInsertion( | ||||||
1105 | StructuredSubobjectInitList->getBeginLoc(), "{") | ||||||
1106 | << FixItHint::CreateInsertion( | ||||||
1107 | SemaRef.getLocForEndOfToken( | ||||||
1108 | StructuredSubobjectInitList->getEndLoc()), | ||||||
1109 | "}"); | ||||||
1110 | } | ||||||
1111 | |||||||
1112 | // Warn if this type won't be an aggregate in future versions of C++. | ||||||
1113 | auto *CXXRD = T->getAsCXXRecordDecl(); | ||||||
1114 | if (!VerifyOnly && CXXRD && CXXRD->hasUserDeclaredConstructor()) { | ||||||
1115 | SemaRef.Diag(StructuredSubobjectInitList->getBeginLoc(), | ||||||
1116 | diag::warn_cxx20_compat_aggregate_init_with_ctors) | ||||||
1117 | << StructuredSubobjectInitList->getSourceRange() << T; | ||||||
1118 | } | ||||||
1119 | } | ||||||
1120 | } | ||||||
1121 | |||||||
1122 | /// Warn that \p Entity was of scalar type and was initialized by a | ||||||
1123 | /// single-element braced initializer list. | ||||||
1124 | static void warnBracedScalarInit(Sema &S, const InitializedEntity &Entity, | ||||||
1125 | SourceRange Braces) { | ||||||
1126 | // Don't warn during template instantiation. If the initialization was | ||||||
1127 | // non-dependent, we warned during the initial parse; otherwise, the | ||||||
1128 | // type might not be scalar in some uses of the template. | ||||||
1129 | if (S.inTemplateInstantiation()) | ||||||
1130 | return; | ||||||
1131 | |||||||
1132 | unsigned DiagID = 0; | ||||||
1133 | |||||||
1134 | switch (Entity.getKind()) { | ||||||
1135 | case InitializedEntity::EK_VectorElement: | ||||||
1136 | case InitializedEntity::EK_ComplexElement: | ||||||
1137 | case InitializedEntity::EK_ArrayElement: | ||||||
1138 | case InitializedEntity::EK_Parameter: | ||||||
1139 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
1140 | case InitializedEntity::EK_TemplateParameter: | ||||||
1141 | case InitializedEntity::EK_Result: | ||||||
1142 | // Extra braces here are suspicious. | ||||||
1143 | DiagID = diag::warn_braces_around_init; | ||||||
1144 | break; | ||||||
1145 | |||||||
1146 | case InitializedEntity::EK_Member: | ||||||
1147 | // Warn on aggregate initialization but not on ctor init list or | ||||||
1148 | // default member initializer. | ||||||
1149 | if (Entity.getParent()) | ||||||
1150 | DiagID = diag::warn_braces_around_init; | ||||||
1151 | break; | ||||||
1152 | |||||||
1153 | case InitializedEntity::EK_Variable: | ||||||
1154 | case InitializedEntity::EK_LambdaCapture: | ||||||
1155 | // No warning, might be direct-list-initialization. | ||||||
1156 | // FIXME: Should we warn for copy-list-initialization in these cases? | ||||||
1157 | break; | ||||||
1158 | |||||||
1159 | case InitializedEntity::EK_New: | ||||||
1160 | case InitializedEntity::EK_Temporary: | ||||||
1161 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
1162 | // No warning, braces are part of the syntax of the underlying construct. | ||||||
1163 | break; | ||||||
1164 | |||||||
1165 | case InitializedEntity::EK_RelatedResult: | ||||||
1166 | // No warning, we already warned when initializing the result. | ||||||
1167 | break; | ||||||
1168 | |||||||
1169 | case InitializedEntity::EK_Exception: | ||||||
1170 | case InitializedEntity::EK_Base: | ||||||
1171 | case InitializedEntity::EK_Delegating: | ||||||
1172 | case InitializedEntity::EK_BlockElement: | ||||||
1173 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
1174 | case InitializedEntity::EK_Binding: | ||||||
1175 | case InitializedEntity::EK_StmtExprResult: | ||||||
1176 | llvm_unreachable("unexpected braced scalar init")::llvm::llvm_unreachable_internal("unexpected braced scalar init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1176); | ||||||
1177 | } | ||||||
1178 | |||||||
1179 | if (DiagID) { | ||||||
1180 | S.Diag(Braces.getBegin(), DiagID) | ||||||
1181 | << Entity.getType()->isSizelessBuiltinType() << Braces | ||||||
1182 | << FixItHint::CreateRemoval(Braces.getBegin()) | ||||||
1183 | << FixItHint::CreateRemoval(Braces.getEnd()); | ||||||
1184 | } | ||||||
1185 | } | ||||||
1186 | |||||||
1187 | /// Check whether the initializer \p IList (that was written with explicit | ||||||
1188 | /// braces) can be used to initialize an object of type \p T. | ||||||
1189 | /// | ||||||
1190 | /// This also fills in \p StructuredList with the fully-braced, desugared | ||||||
1191 | /// form of the initialization. | ||||||
1192 | void InitListChecker::CheckExplicitInitList(const InitializedEntity &Entity, | ||||||
1193 | InitListExpr *IList, QualType &T, | ||||||
1194 | InitListExpr *StructuredList, | ||||||
1195 | bool TopLevelObject) { | ||||||
1196 | unsigned Index = 0, StructuredIndex = 0; | ||||||
1197 | CheckListElementTypes(Entity, IList, T, /*SubobjectIsDesignatorContext=*/true, | ||||||
1198 | Index, StructuredList, StructuredIndex, TopLevelObject); | ||||||
1199 | if (StructuredList) { | ||||||
1200 | QualType ExprTy = T; | ||||||
1201 | if (!ExprTy->isArrayType()) | ||||||
1202 | ExprTy = ExprTy.getNonLValueExprType(SemaRef.Context); | ||||||
1203 | if (!VerifyOnly) | ||||||
1204 | IList->setType(ExprTy); | ||||||
1205 | StructuredList->setType(ExprTy); | ||||||
1206 | } | ||||||
1207 | if (hadError) | ||||||
1208 | return; | ||||||
1209 | |||||||
1210 | // Don't complain for incomplete types, since we'll get an error elsewhere. | ||||||
1211 | if (Index < IList->getNumInits() && !T->isIncompleteType()) { | ||||||
1212 | // We have leftover initializers | ||||||
1213 | bool ExtraInitsIsError = SemaRef.getLangOpts().CPlusPlus || | ||||||
1214 | (SemaRef.getLangOpts().OpenCL && T->isVectorType()); | ||||||
1215 | hadError = ExtraInitsIsError; | ||||||
1216 | if (VerifyOnly) { | ||||||
1217 | return; | ||||||
1218 | } else if (StructuredIndex == 1 && | ||||||
1219 | IsStringInit(StructuredList->getInit(0), T, SemaRef.Context) == | ||||||
1220 | SIF_None) { | ||||||
1221 | unsigned DK = | ||||||
1222 | ExtraInitsIsError | ||||||
1223 | ? diag::err_excess_initializers_in_char_array_initializer | ||||||
1224 | : diag::ext_excess_initializers_in_char_array_initializer; | ||||||
1225 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||||
1226 | << IList->getInit(Index)->getSourceRange(); | ||||||
1227 | } else if (T->isSizelessBuiltinType()) { | ||||||
1228 | unsigned DK = ExtraInitsIsError | ||||||
1229 | ? diag::err_excess_initializers_for_sizeless_type | ||||||
1230 | : diag::ext_excess_initializers_for_sizeless_type; | ||||||
1231 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||||
1232 | << T << IList->getInit(Index)->getSourceRange(); | ||||||
1233 | } else { | ||||||
1234 | int initKind = T->isArrayType() ? 0 : | ||||||
1235 | T->isVectorType() ? 1 : | ||||||
1236 | T->isScalarType() ? 2 : | ||||||
1237 | T->isUnionType() ? 3 : | ||||||
1238 | 4; | ||||||
1239 | |||||||
1240 | unsigned DK = ExtraInitsIsError ? diag::err_excess_initializers | ||||||
1241 | : diag::ext_excess_initializers; | ||||||
1242 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||||
1243 | << initKind << IList->getInit(Index)->getSourceRange(); | ||||||
1244 | } | ||||||
1245 | } | ||||||
1246 | |||||||
1247 | if (!VerifyOnly) { | ||||||
1248 | if (T->isScalarType() && IList->getNumInits() == 1 && | ||||||
1249 | !isa<InitListExpr>(IList->getInit(0))) | ||||||
1250 | warnBracedScalarInit(SemaRef, Entity, IList->getSourceRange()); | ||||||
1251 | |||||||
1252 | // Warn if this is a class type that won't be an aggregate in future | ||||||
1253 | // versions of C++. | ||||||
1254 | auto *CXXRD = T->getAsCXXRecordDecl(); | ||||||
1255 | if (CXXRD && CXXRD->hasUserDeclaredConstructor()) { | ||||||
1256 | // Don't warn if there's an equivalent default constructor that would be | ||||||
1257 | // used instead. | ||||||
1258 | bool HasEquivCtor = false; | ||||||
1259 | if (IList->getNumInits() == 0) { | ||||||
1260 | auto *CD = SemaRef.LookupDefaultConstructor(CXXRD); | ||||||
1261 | HasEquivCtor = CD && !CD->isDeleted(); | ||||||
1262 | } | ||||||
1263 | |||||||
1264 | if (!HasEquivCtor) { | ||||||
1265 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1266 | diag::warn_cxx20_compat_aggregate_init_with_ctors) | ||||||
1267 | << IList->getSourceRange() << T; | ||||||
1268 | } | ||||||
1269 | } | ||||||
1270 | } | ||||||
1271 | } | ||||||
1272 | |||||||
1273 | void InitListChecker::CheckListElementTypes(const InitializedEntity &Entity, | ||||||
1274 | InitListExpr *IList, | ||||||
1275 | QualType &DeclType, | ||||||
1276 | bool SubobjectIsDesignatorContext, | ||||||
1277 | unsigned &Index, | ||||||
1278 | InitListExpr *StructuredList, | ||||||
1279 | unsigned &StructuredIndex, | ||||||
1280 | bool TopLevelObject) { | ||||||
1281 | if (DeclType->isAnyComplexType() && SubobjectIsDesignatorContext) { | ||||||
1282 | // Explicitly braced initializer for complex type can be real+imaginary | ||||||
1283 | // parts. | ||||||
1284 | CheckComplexType(Entity, IList, DeclType, Index, | ||||||
1285 | StructuredList, StructuredIndex); | ||||||
1286 | } else if (DeclType->isScalarType()) { | ||||||
1287 | CheckScalarType(Entity, IList, DeclType, Index, | ||||||
1288 | StructuredList, StructuredIndex); | ||||||
1289 | } else if (DeclType->isVectorType()) { | ||||||
1290 | CheckVectorType(Entity, IList, DeclType, Index, | ||||||
1291 | StructuredList, StructuredIndex); | ||||||
1292 | } else if (DeclType->isRecordType()) { | ||||||
1293 | assert(DeclType->isAggregateType() &&(static_cast <bool> (DeclType->isAggregateType() && "non-aggregate records should be handed in CheckSubElementType" ) ? void (0) : __assert_fail ("DeclType->isAggregateType() && \"non-aggregate records should be handed in CheckSubElementType\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1294, __extension__ __PRETTY_FUNCTION__)) | ||||||
1294 | "non-aggregate records should be handed in CheckSubElementType")(static_cast <bool> (DeclType->isAggregateType() && "non-aggregate records should be handed in CheckSubElementType" ) ? void (0) : __assert_fail ("DeclType->isAggregateType() && \"non-aggregate records should be handed in CheckSubElementType\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1294, __extension__ __PRETTY_FUNCTION__)); | ||||||
1295 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||||
1296 | auto Bases = | ||||||
1297 | CXXRecordDecl::base_class_range(CXXRecordDecl::base_class_iterator(), | ||||||
1298 | CXXRecordDecl::base_class_iterator()); | ||||||
1299 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) | ||||||
1300 | Bases = CXXRD->bases(); | ||||||
1301 | CheckStructUnionTypes(Entity, IList, DeclType, Bases, RD->field_begin(), | ||||||
1302 | SubobjectIsDesignatorContext, Index, StructuredList, | ||||||
1303 | StructuredIndex, TopLevelObject); | ||||||
1304 | } else if (DeclType->isArrayType()) { | ||||||
1305 | llvm::APSInt Zero( | ||||||
1306 | SemaRef.Context.getTypeSize(SemaRef.Context.getSizeType()), | ||||||
1307 | false); | ||||||
1308 | CheckArrayType(Entity, IList, DeclType, Zero, | ||||||
1309 | SubobjectIsDesignatorContext, Index, | ||||||
1310 | StructuredList, StructuredIndex); | ||||||
1311 | } else if (DeclType->isVoidType() || DeclType->isFunctionType()) { | ||||||
1312 | // This type is invalid, issue a diagnostic. | ||||||
1313 | ++Index; | ||||||
1314 | if (!VerifyOnly) | ||||||
1315 | SemaRef.Diag(IList->getBeginLoc(), diag::err_illegal_initializer_type) | ||||||
1316 | << DeclType; | ||||||
1317 | hadError = true; | ||||||
1318 | } else if (DeclType->isReferenceType()) { | ||||||
1319 | CheckReferenceType(Entity, IList, DeclType, Index, | ||||||
1320 | StructuredList, StructuredIndex); | ||||||
1321 | } else if (DeclType->isObjCObjectType()) { | ||||||
1322 | if (!VerifyOnly) | ||||||
1323 | SemaRef.Diag(IList->getBeginLoc(), diag::err_init_objc_class) << DeclType; | ||||||
1324 | hadError = true; | ||||||
1325 | } else if (DeclType->isOCLIntelSubgroupAVCType() || | ||||||
1326 | DeclType->isSizelessBuiltinType()) { | ||||||
1327 | // Checks for scalar type are sufficient for these types too. | ||||||
1328 | CheckScalarType(Entity, IList, DeclType, Index, StructuredList, | ||||||
1329 | StructuredIndex); | ||||||
1330 | } else { | ||||||
1331 | if (!VerifyOnly) | ||||||
1332 | SemaRef.Diag(IList->getBeginLoc(), diag::err_illegal_initializer_type) | ||||||
1333 | << DeclType; | ||||||
1334 | hadError = true; | ||||||
1335 | } | ||||||
1336 | } | ||||||
1337 | |||||||
1338 | void InitListChecker::CheckSubElementType(const InitializedEntity &Entity, | ||||||
1339 | InitListExpr *IList, | ||||||
1340 | QualType ElemType, | ||||||
1341 | unsigned &Index, | ||||||
1342 | InitListExpr *StructuredList, | ||||||
1343 | unsigned &StructuredIndex, | ||||||
1344 | bool DirectlyDesignated) { | ||||||
1345 | Expr *expr = IList->getInit(Index); | ||||||
1346 | |||||||
1347 | if (ElemType->isReferenceType()) | ||||||
1348 | return CheckReferenceType(Entity, IList, ElemType, Index, | ||||||
1349 | StructuredList, StructuredIndex); | ||||||
1350 | |||||||
1351 | if (InitListExpr *SubInitList = dyn_cast<InitListExpr>(expr)) { | ||||||
1352 | if (SubInitList->getNumInits() == 1 && | ||||||
1353 | IsStringInit(SubInitList->getInit(0), ElemType, SemaRef.Context) == | ||||||
1354 | SIF_None) { | ||||||
1355 | // FIXME: It would be more faithful and no less correct to include an | ||||||
1356 | // InitListExpr in the semantic form of the initializer list in this case. | ||||||
1357 | expr = SubInitList->getInit(0); | ||||||
1358 | } | ||||||
1359 | // Nested aggregate initialization and C++ initialization are handled later. | ||||||
1360 | } else if (isa<ImplicitValueInitExpr>(expr)) { | ||||||
1361 | // This happens during template instantiation when we see an InitListExpr | ||||||
1362 | // that we've already checked once. | ||||||
1363 | assert(SemaRef.Context.hasSameType(expr->getType(), ElemType) &&(static_cast <bool> (SemaRef.Context.hasSameType(expr-> getType(), ElemType) && "found implicit initialization for the wrong type" ) ? void (0) : __assert_fail ("SemaRef.Context.hasSameType(expr->getType(), ElemType) && \"found implicit initialization for the wrong type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1364, __extension__ __PRETTY_FUNCTION__)) | ||||||
1364 | "found implicit initialization for the wrong type")(static_cast <bool> (SemaRef.Context.hasSameType(expr-> getType(), ElemType) && "found implicit initialization for the wrong type" ) ? void (0) : __assert_fail ("SemaRef.Context.hasSameType(expr->getType(), ElemType) && \"found implicit initialization for the wrong type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1364, __extension__ __PRETTY_FUNCTION__)); | ||||||
1365 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||||
1366 | ++Index; | ||||||
1367 | return; | ||||||
1368 | } | ||||||
1369 | |||||||
1370 | if (SemaRef.getLangOpts().CPlusPlus || isa<InitListExpr>(expr)) { | ||||||
1371 | // C++ [dcl.init.aggr]p2: | ||||||
1372 | // Each member is copy-initialized from the corresponding | ||||||
1373 | // initializer-clause. | ||||||
1374 | |||||||
1375 | // FIXME: Better EqualLoc? | ||||||
1376 | InitializationKind Kind = | ||||||
1377 | InitializationKind::CreateCopy(expr->getBeginLoc(), SourceLocation()); | ||||||
1378 | |||||||
1379 | // Vector elements can be initialized from other vectors in which case | ||||||
1380 | // we need initialization entity with a type of a vector (and not a vector | ||||||
1381 | // element!) initializing multiple vector elements. | ||||||
1382 | auto TmpEntity = | ||||||
1383 | (ElemType->isExtVectorType() && !Entity.getType()->isExtVectorType()) | ||||||
1384 | ? InitializedEntity::InitializeTemporary(ElemType) | ||||||
1385 | : Entity; | ||||||
1386 | |||||||
1387 | InitializationSequence Seq(SemaRef, TmpEntity, Kind, expr, | ||||||
1388 | /*TopLevelOfInitList*/ true); | ||||||
1389 | |||||||
1390 | // C++14 [dcl.init.aggr]p13: | ||||||
1391 | // If the assignment-expression can initialize a member, the member is | ||||||
1392 | // initialized. Otherwise [...] brace elision is assumed | ||||||
1393 | // | ||||||
1394 | // Brace elision is never performed if the element is not an | ||||||
1395 | // assignment-expression. | ||||||
1396 | if (Seq || isa<InitListExpr>(expr)) { | ||||||
1397 | if (!VerifyOnly) { | ||||||
1398 | ExprResult Result = Seq.Perform(SemaRef, TmpEntity, Kind, expr); | ||||||
1399 | if (Result.isInvalid()) | ||||||
1400 | hadError = true; | ||||||
1401 | |||||||
1402 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||||
1403 | Result.getAs<Expr>()); | ||||||
1404 | } else if (!Seq) { | ||||||
1405 | hadError = true; | ||||||
1406 | } else if (StructuredList) { | ||||||
1407 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||||
1408 | getDummyInit()); | ||||||
1409 | } | ||||||
1410 | ++Index; | ||||||
1411 | return; | ||||||
1412 | } | ||||||
1413 | |||||||
1414 | // Fall through for subaggregate initialization | ||||||
1415 | } else if (ElemType->isScalarType() || ElemType->isAtomicType()) { | ||||||
1416 | // FIXME: Need to handle atomic aggregate types with implicit init lists. | ||||||
1417 | return CheckScalarType(Entity, IList, ElemType, Index, | ||||||
1418 | StructuredList, StructuredIndex); | ||||||
1419 | } else if (const ArrayType *arrayType = | ||||||
1420 | SemaRef.Context.getAsArrayType(ElemType)) { | ||||||
1421 | // arrayType can be incomplete if we're initializing a flexible | ||||||
1422 | // array member. There's nothing we can do with the completed | ||||||
1423 | // type here, though. | ||||||
1424 | |||||||
1425 | if (IsStringInit(expr, arrayType, SemaRef.Context) == SIF_None) { | ||||||
1426 | // FIXME: Should we do this checking in verify-only mode? | ||||||
1427 | if (!VerifyOnly) | ||||||
1428 | CheckStringInit(expr, ElemType, arrayType, SemaRef); | ||||||
1429 | if (StructuredList) | ||||||
1430 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||||
1431 | ++Index; | ||||||
1432 | return; | ||||||
1433 | } | ||||||
1434 | |||||||
1435 | // Fall through for subaggregate initialization. | ||||||
1436 | |||||||
1437 | } else { | ||||||
1438 | assert((ElemType->isRecordType() || ElemType->isVectorType() ||(static_cast <bool> ((ElemType->isRecordType() || ElemType ->isVectorType() || ElemType->isOpenCLSpecificType()) && "Unexpected type") ? void (0) : __assert_fail ("(ElemType->isRecordType() || ElemType->isVectorType() || ElemType->isOpenCLSpecificType()) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1439, __extension__ __PRETTY_FUNCTION__)) | ||||||
1439 | ElemType->isOpenCLSpecificType()) && "Unexpected type")(static_cast <bool> ((ElemType->isRecordType() || ElemType ->isVectorType() || ElemType->isOpenCLSpecificType()) && "Unexpected type") ? void (0) : __assert_fail ("(ElemType->isRecordType() || ElemType->isVectorType() || ElemType->isOpenCLSpecificType()) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1439, __extension__ __PRETTY_FUNCTION__)); | ||||||
1440 | |||||||
1441 | // C99 6.7.8p13: | ||||||
1442 | // | ||||||
1443 | // The initializer for a structure or union object that has | ||||||
1444 | // automatic storage duration shall be either an initializer | ||||||
1445 | // list as described below, or a single expression that has | ||||||
1446 | // compatible structure or union type. In the latter case, the | ||||||
1447 | // initial value of the object, including unnamed members, is | ||||||
1448 | // that of the expression. | ||||||
1449 | ExprResult ExprRes = expr; | ||||||
1450 | if (SemaRef.CheckSingleAssignmentConstraints( | ||||||
1451 | ElemType, ExprRes, !VerifyOnly) != Sema::Incompatible) { | ||||||
1452 | if (ExprRes.isInvalid()) | ||||||
1453 | hadError = true; | ||||||
1454 | else { | ||||||
1455 | ExprRes = SemaRef.DefaultFunctionArrayLvalueConversion(ExprRes.get()); | ||||||
1456 | if (ExprRes.isInvalid()) | ||||||
1457 | hadError = true; | ||||||
1458 | } | ||||||
1459 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||||
1460 | ExprRes.getAs<Expr>()); | ||||||
1461 | ++Index; | ||||||
1462 | return; | ||||||
1463 | } | ||||||
1464 | ExprRes.get(); | ||||||
1465 | // Fall through for subaggregate initialization | ||||||
1466 | } | ||||||
1467 | |||||||
1468 | // C++ [dcl.init.aggr]p12: | ||||||
1469 | // | ||||||
1470 | // [...] Otherwise, if the member is itself a non-empty | ||||||
1471 | // subaggregate, brace elision is assumed and the initializer is | ||||||
1472 | // considered for the initialization of the first member of | ||||||
1473 | // the subaggregate. | ||||||
1474 | // OpenCL vector initializer is handled elsewhere. | ||||||
1475 | if ((!SemaRef.getLangOpts().OpenCL && ElemType->isVectorType()) || | ||||||
1476 | ElemType->isAggregateType()) { | ||||||
1477 | CheckImplicitInitList(Entity, IList, ElemType, Index, StructuredList, | ||||||
1478 | StructuredIndex); | ||||||
1479 | ++StructuredIndex; | ||||||
1480 | |||||||
1481 | // In C++20, brace elision is not permitted for a designated initializer. | ||||||
1482 | if (DirectlyDesignated && SemaRef.getLangOpts().CPlusPlus && !hadError) { | ||||||
1483 | if (InOverloadResolution) | ||||||
1484 | hadError = true; | ||||||
1485 | if (!VerifyOnly) { | ||||||
1486 | SemaRef.Diag(expr->getBeginLoc(), | ||||||
1487 | diag::ext_designated_init_brace_elision) | ||||||
1488 | << expr->getSourceRange() | ||||||
1489 | << FixItHint::CreateInsertion(expr->getBeginLoc(), "{") | ||||||
1490 | << FixItHint::CreateInsertion( | ||||||
1491 | SemaRef.getLocForEndOfToken(expr->getEndLoc()), "}"); | ||||||
1492 | } | ||||||
1493 | } | ||||||
1494 | } else { | ||||||
1495 | if (!VerifyOnly) { | ||||||
1496 | // We cannot initialize this element, so let PerformCopyInitialization | ||||||
1497 | // produce the appropriate diagnostic. We already checked that this | ||||||
1498 | // initialization will fail. | ||||||
1499 | ExprResult Copy = | ||||||
1500 | SemaRef.PerformCopyInitialization(Entity, SourceLocation(), expr, | ||||||
1501 | /*TopLevelOfInitList=*/true); | ||||||
1502 | (void)Copy; | ||||||
1503 | assert(Copy.isInvalid() &&(static_cast <bool> (Copy.isInvalid() && "expected non-aggregate initialization to fail" ) ? void (0) : __assert_fail ("Copy.isInvalid() && \"expected non-aggregate initialization to fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1504, __extension__ __PRETTY_FUNCTION__)) | ||||||
1504 | "expected non-aggregate initialization to fail")(static_cast <bool> (Copy.isInvalid() && "expected non-aggregate initialization to fail" ) ? void (0) : __assert_fail ("Copy.isInvalid() && \"expected non-aggregate initialization to fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1504, __extension__ __PRETTY_FUNCTION__)); | ||||||
1505 | } | ||||||
1506 | hadError = true; | ||||||
1507 | ++Index; | ||||||
1508 | ++StructuredIndex; | ||||||
1509 | } | ||||||
1510 | } | ||||||
1511 | |||||||
1512 | void InitListChecker::CheckComplexType(const InitializedEntity &Entity, | ||||||
1513 | InitListExpr *IList, QualType DeclType, | ||||||
1514 | unsigned &Index, | ||||||
1515 | InitListExpr *StructuredList, | ||||||
1516 | unsigned &StructuredIndex) { | ||||||
1517 | assert(Index == 0 && "Index in explicit init list must be zero")(static_cast <bool> (Index == 0 && "Index in explicit init list must be zero" ) ? void (0) : __assert_fail ("Index == 0 && \"Index in explicit init list must be zero\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1517, __extension__ __PRETTY_FUNCTION__)); | ||||||
1518 | |||||||
1519 | // As an extension, clang supports complex initializers, which initialize | ||||||
1520 | // a complex number component-wise. When an explicit initializer list for | ||||||
1521 | // a complex number contains two two initializers, this extension kicks in: | ||||||
1522 | // it exepcts the initializer list to contain two elements convertible to | ||||||
1523 | // the element type of the complex type. The first element initializes | ||||||
1524 | // the real part, and the second element intitializes the imaginary part. | ||||||
1525 | |||||||
1526 | if (IList->getNumInits() != 2) | ||||||
1527 | return CheckScalarType(Entity, IList, DeclType, Index, StructuredList, | ||||||
1528 | StructuredIndex); | ||||||
1529 | |||||||
1530 | // This is an extension in C. (The builtin _Complex type does not exist | ||||||
1531 | // in the C++ standard.) | ||||||
1532 | if (!SemaRef.getLangOpts().CPlusPlus && !VerifyOnly) | ||||||
1533 | SemaRef.Diag(IList->getBeginLoc(), diag::ext_complex_component_init) | ||||||
1534 | << IList->getSourceRange(); | ||||||
1535 | |||||||
1536 | // Initialize the complex number. | ||||||
1537 | QualType elementType = DeclType->castAs<ComplexType>()->getElementType(); | ||||||
1538 | InitializedEntity ElementEntity = | ||||||
1539 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||||
1540 | |||||||
1541 | for (unsigned i = 0; i < 2; ++i) { | ||||||
1542 | ElementEntity.setElementIndex(Index); | ||||||
1543 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||||
1544 | StructuredList, StructuredIndex); | ||||||
1545 | } | ||||||
1546 | } | ||||||
1547 | |||||||
1548 | void InitListChecker::CheckScalarType(const InitializedEntity &Entity, | ||||||
1549 | InitListExpr *IList, QualType DeclType, | ||||||
1550 | unsigned &Index, | ||||||
1551 | InitListExpr *StructuredList, | ||||||
1552 | unsigned &StructuredIndex) { | ||||||
1553 | if (Index >= IList->getNumInits()) { | ||||||
1554 | if (!VerifyOnly) { | ||||||
1555 | if (DeclType->isSizelessBuiltinType()) | ||||||
1556 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1557 | SemaRef.getLangOpts().CPlusPlus11 | ||||||
1558 | ? diag::warn_cxx98_compat_empty_sizeless_initializer | ||||||
1559 | : diag::err_empty_sizeless_initializer) | ||||||
1560 | << DeclType << IList->getSourceRange(); | ||||||
1561 | else | ||||||
1562 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1563 | SemaRef.getLangOpts().CPlusPlus11 | ||||||
1564 | ? diag::warn_cxx98_compat_empty_scalar_initializer | ||||||
1565 | : diag::err_empty_scalar_initializer) | ||||||
1566 | << IList->getSourceRange(); | ||||||
1567 | } | ||||||
1568 | hadError = !SemaRef.getLangOpts().CPlusPlus11; | ||||||
1569 | ++Index; | ||||||
1570 | ++StructuredIndex; | ||||||
1571 | return; | ||||||
1572 | } | ||||||
1573 | |||||||
1574 | Expr *expr = IList->getInit(Index); | ||||||
1575 | if (InitListExpr *SubIList = dyn_cast<InitListExpr>(expr)) { | ||||||
1576 | // FIXME: This is invalid, and accepting it causes overload resolution | ||||||
1577 | // to pick the wrong overload in some corner cases. | ||||||
1578 | if (!VerifyOnly) | ||||||
1579 | SemaRef.Diag(SubIList->getBeginLoc(), diag::ext_many_braces_around_init) | ||||||
1580 | << DeclType->isSizelessBuiltinType() << SubIList->getSourceRange(); | ||||||
1581 | |||||||
1582 | CheckScalarType(Entity, SubIList, DeclType, Index, StructuredList, | ||||||
1583 | StructuredIndex); | ||||||
1584 | return; | ||||||
1585 | } else if (isa<DesignatedInitExpr>(expr)) { | ||||||
1586 | if (!VerifyOnly) | ||||||
1587 | SemaRef.Diag(expr->getBeginLoc(), | ||||||
1588 | diag::err_designator_for_scalar_or_sizeless_init) | ||||||
1589 | << DeclType->isSizelessBuiltinType() << DeclType | ||||||
1590 | << expr->getSourceRange(); | ||||||
1591 | hadError = true; | ||||||
1592 | ++Index; | ||||||
1593 | ++StructuredIndex; | ||||||
1594 | return; | ||||||
1595 | } | ||||||
1596 | |||||||
1597 | ExprResult Result; | ||||||
1598 | if (VerifyOnly) { | ||||||
1599 | if (SemaRef.CanPerformCopyInitialization(Entity, expr)) | ||||||
1600 | Result = getDummyInit(); | ||||||
1601 | else | ||||||
1602 | Result = ExprError(); | ||||||
1603 | } else { | ||||||
1604 | Result = | ||||||
1605 | SemaRef.PerformCopyInitialization(Entity, expr->getBeginLoc(), expr, | ||||||
1606 | /*TopLevelOfInitList=*/true); | ||||||
1607 | } | ||||||
1608 | |||||||
1609 | Expr *ResultExpr = nullptr; | ||||||
1610 | |||||||
1611 | if (Result.isInvalid()) | ||||||
1612 | hadError = true; // types weren't compatible. | ||||||
1613 | else { | ||||||
1614 | ResultExpr = Result.getAs<Expr>(); | ||||||
1615 | |||||||
1616 | if (ResultExpr != expr && !VerifyOnly) { | ||||||
1617 | // The type was promoted, update initializer list. | ||||||
1618 | // FIXME: Why are we updating the syntactic init list? | ||||||
1619 | IList->setInit(Index, ResultExpr); | ||||||
1620 | } | ||||||
1621 | } | ||||||
1622 | UpdateStructuredListElement(StructuredList, StructuredIndex, ResultExpr); | ||||||
1623 | ++Index; | ||||||
1624 | } | ||||||
1625 | |||||||
1626 | void InitListChecker::CheckReferenceType(const InitializedEntity &Entity, | ||||||
1627 | InitListExpr *IList, QualType DeclType, | ||||||
1628 | unsigned &Index, | ||||||
1629 | InitListExpr *StructuredList, | ||||||
1630 | unsigned &StructuredIndex) { | ||||||
1631 | if (Index >= IList->getNumInits()) { | ||||||
1632 | // FIXME: It would be wonderful if we could point at the actual member. In | ||||||
1633 | // general, it would be useful to pass location information down the stack, | ||||||
1634 | // so that we know the location (or decl) of the "current object" being | ||||||
1635 | // initialized. | ||||||
1636 | if (!VerifyOnly) | ||||||
1637 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1638 | diag::err_init_reference_member_uninitialized) | ||||||
1639 | << DeclType << IList->getSourceRange(); | ||||||
1640 | hadError = true; | ||||||
1641 | ++Index; | ||||||
1642 | ++StructuredIndex; | ||||||
1643 | return; | ||||||
1644 | } | ||||||
1645 | |||||||
1646 | Expr *expr = IList->getInit(Index); | ||||||
1647 | if (isa<InitListExpr>(expr) && !SemaRef.getLangOpts().CPlusPlus11) { | ||||||
1648 | if (!VerifyOnly) | ||||||
1649 | SemaRef.Diag(IList->getBeginLoc(), diag::err_init_non_aggr_init_list) | ||||||
1650 | << DeclType << IList->getSourceRange(); | ||||||
1651 | hadError = true; | ||||||
1652 | ++Index; | ||||||
1653 | ++StructuredIndex; | ||||||
1654 | return; | ||||||
1655 | } | ||||||
1656 | |||||||
1657 | ExprResult Result; | ||||||
1658 | if (VerifyOnly) { | ||||||
1659 | if (SemaRef.CanPerformCopyInitialization(Entity,expr)) | ||||||
1660 | Result = getDummyInit(); | ||||||
1661 | else | ||||||
1662 | Result = ExprError(); | ||||||
1663 | } else { | ||||||
1664 | Result = | ||||||
1665 | SemaRef.PerformCopyInitialization(Entity, expr->getBeginLoc(), expr, | ||||||
1666 | /*TopLevelOfInitList=*/true); | ||||||
1667 | } | ||||||
1668 | |||||||
1669 | if (Result.isInvalid()) | ||||||
1670 | hadError = true; | ||||||
1671 | |||||||
1672 | expr = Result.getAs<Expr>(); | ||||||
1673 | // FIXME: Why are we updating the syntactic init list? | ||||||
1674 | if (!VerifyOnly && expr) | ||||||
1675 | IList->setInit(Index, expr); | ||||||
1676 | |||||||
1677 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||||
1678 | ++Index; | ||||||
1679 | } | ||||||
1680 | |||||||
1681 | void InitListChecker::CheckVectorType(const InitializedEntity &Entity, | ||||||
1682 | InitListExpr *IList, QualType DeclType, | ||||||
1683 | unsigned &Index, | ||||||
1684 | InitListExpr *StructuredList, | ||||||
1685 | unsigned &StructuredIndex) { | ||||||
1686 | const VectorType *VT = DeclType->castAs<VectorType>(); | ||||||
1687 | unsigned maxElements = VT->getNumElements(); | ||||||
1688 | unsigned numEltsInit = 0; | ||||||
1689 | QualType elementType = VT->getElementType(); | ||||||
1690 | |||||||
1691 | if (Index >= IList->getNumInits()) { | ||||||
1692 | // Make sure the element type can be value-initialized. | ||||||
1693 | CheckEmptyInitializable( | ||||||
1694 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity), | ||||||
1695 | IList->getEndLoc()); | ||||||
1696 | return; | ||||||
1697 | } | ||||||
1698 | |||||||
1699 | if (!SemaRef.getLangOpts().OpenCL) { | ||||||
1700 | // If the initializing element is a vector, try to copy-initialize | ||||||
1701 | // instead of breaking it apart (which is doomed to failure anyway). | ||||||
1702 | Expr *Init = IList->getInit(Index); | ||||||
1703 | if (!isa<InitListExpr>(Init) && Init->getType()->isVectorType()) { | ||||||
1704 | ExprResult Result; | ||||||
1705 | if (VerifyOnly) { | ||||||
1706 | if (SemaRef.CanPerformCopyInitialization(Entity, Init)) | ||||||
1707 | Result = getDummyInit(); | ||||||
1708 | else | ||||||
1709 | Result = ExprError(); | ||||||
1710 | } else { | ||||||
1711 | Result = | ||||||
1712 | SemaRef.PerformCopyInitialization(Entity, Init->getBeginLoc(), Init, | ||||||
1713 | /*TopLevelOfInitList=*/true); | ||||||
1714 | } | ||||||
1715 | |||||||
1716 | Expr *ResultExpr = nullptr; | ||||||
1717 | if (Result.isInvalid()) | ||||||
1718 | hadError = true; // types weren't compatible. | ||||||
1719 | else { | ||||||
1720 | ResultExpr = Result.getAs<Expr>(); | ||||||
1721 | |||||||
1722 | if (ResultExpr != Init && !VerifyOnly) { | ||||||
1723 | // The type was promoted, update initializer list. | ||||||
1724 | // FIXME: Why are we updating the syntactic init list? | ||||||
1725 | IList->setInit(Index, ResultExpr); | ||||||
1726 | } | ||||||
1727 | } | ||||||
1728 | UpdateStructuredListElement(StructuredList, StructuredIndex, ResultExpr); | ||||||
1729 | ++Index; | ||||||
1730 | return; | ||||||
1731 | } | ||||||
1732 | |||||||
1733 | InitializedEntity ElementEntity = | ||||||
1734 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||||
1735 | |||||||
1736 | for (unsigned i = 0; i < maxElements; ++i, ++numEltsInit) { | ||||||
1737 | // Don't attempt to go past the end of the init list | ||||||
1738 | if (Index >= IList->getNumInits()) { | ||||||
1739 | CheckEmptyInitializable(ElementEntity, IList->getEndLoc()); | ||||||
1740 | break; | ||||||
1741 | } | ||||||
1742 | |||||||
1743 | ElementEntity.setElementIndex(Index); | ||||||
1744 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||||
1745 | StructuredList, StructuredIndex); | ||||||
1746 | } | ||||||
1747 | |||||||
1748 | if (VerifyOnly) | ||||||
1749 | return; | ||||||
1750 | |||||||
1751 | bool isBigEndian = SemaRef.Context.getTargetInfo().isBigEndian(); | ||||||
1752 | const VectorType *T = Entity.getType()->castAs<VectorType>(); | ||||||
1753 | if (isBigEndian && (T->getVectorKind() == VectorType::NeonVector || | ||||||
1754 | T->getVectorKind() == VectorType::NeonPolyVector)) { | ||||||
1755 | // The ability to use vector initializer lists is a GNU vector extension | ||||||
1756 | // and is unrelated to the NEON intrinsics in arm_neon.h. On little | ||||||
1757 | // endian machines it works fine, however on big endian machines it | ||||||
1758 | // exhibits surprising behaviour: | ||||||
1759 | // | ||||||
1760 | // uint32x2_t x = {42, 64}; | ||||||
1761 | // return vget_lane_u32(x, 0); // Will return 64. | ||||||
1762 | // | ||||||
1763 | // Because of this, explicitly call out that it is non-portable. | ||||||
1764 | // | ||||||
1765 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1766 | diag::warn_neon_vector_initializer_non_portable); | ||||||
1767 | |||||||
1768 | const char *typeCode; | ||||||
1769 | unsigned typeSize = SemaRef.Context.getTypeSize(elementType); | ||||||
1770 | |||||||
1771 | if (elementType->isFloatingType()) | ||||||
1772 | typeCode = "f"; | ||||||
1773 | else if (elementType->isSignedIntegerType()) | ||||||
1774 | typeCode = "s"; | ||||||
1775 | else if (elementType->isUnsignedIntegerType()) | ||||||
1776 | typeCode = "u"; | ||||||
1777 | else | ||||||
1778 | llvm_unreachable("Invalid element type!")::llvm::llvm_unreachable_internal("Invalid element type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1778); | ||||||
1779 | |||||||
1780 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1781 | SemaRef.Context.getTypeSize(VT) > 64 | ||||||
1782 | ? diag::note_neon_vector_initializer_non_portable_q | ||||||
1783 | : diag::note_neon_vector_initializer_non_portable) | ||||||
1784 | << typeCode << typeSize; | ||||||
1785 | } | ||||||
1786 | |||||||
1787 | return; | ||||||
1788 | } | ||||||
1789 | |||||||
1790 | InitializedEntity ElementEntity = | ||||||
1791 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||||
1792 | |||||||
1793 | // OpenCL initializers allows vectors to be constructed from vectors. | ||||||
1794 | for (unsigned i = 0; i < maxElements; ++i) { | ||||||
1795 | // Don't attempt to go past the end of the init list | ||||||
1796 | if (Index >= IList->getNumInits()) | ||||||
1797 | break; | ||||||
1798 | |||||||
1799 | ElementEntity.setElementIndex(Index); | ||||||
1800 | |||||||
1801 | QualType IType = IList->getInit(Index)->getType(); | ||||||
1802 | if (!IType->isVectorType()) { | ||||||
1803 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||||
1804 | StructuredList, StructuredIndex); | ||||||
1805 | ++numEltsInit; | ||||||
1806 | } else { | ||||||
1807 | QualType VecType; | ||||||
1808 | const VectorType *IVT = IType->castAs<VectorType>(); | ||||||
1809 | unsigned numIElts = IVT->getNumElements(); | ||||||
1810 | |||||||
1811 | if (IType->isExtVectorType()) | ||||||
1812 | VecType = SemaRef.Context.getExtVectorType(elementType, numIElts); | ||||||
1813 | else | ||||||
1814 | VecType = SemaRef.Context.getVectorType(elementType, numIElts, | ||||||
1815 | IVT->getVectorKind()); | ||||||
1816 | CheckSubElementType(ElementEntity, IList, VecType, Index, | ||||||
1817 | StructuredList, StructuredIndex); | ||||||
1818 | numEltsInit += numIElts; | ||||||
1819 | } | ||||||
1820 | } | ||||||
1821 | |||||||
1822 | // OpenCL requires all elements to be initialized. | ||||||
1823 | if (numEltsInit != maxElements) { | ||||||
1824 | if (!VerifyOnly) | ||||||
1825 | SemaRef.Diag(IList->getBeginLoc(), | ||||||
1826 | diag::err_vector_incorrect_num_initializers) | ||||||
1827 | << (numEltsInit < maxElements) << maxElements << numEltsInit; | ||||||
1828 | hadError = true; | ||||||
1829 | } | ||||||
1830 | } | ||||||
1831 | |||||||
1832 | /// Check if the type of a class element has an accessible destructor, and marks | ||||||
1833 | /// it referenced. Returns true if we shouldn't form a reference to the | ||||||
1834 | /// destructor. | ||||||
1835 | /// | ||||||
1836 | /// Aggregate initialization requires a class element's destructor be | ||||||
1837 | /// accessible per 11.6.1 [dcl.init.aggr]: | ||||||
1838 | /// | ||||||
1839 | /// The destructor for each element of class type is potentially invoked | ||||||
1840 | /// (15.4 [class.dtor]) from the context where the aggregate initialization | ||||||
1841 | /// occurs. | ||||||
1842 | static bool checkDestructorReference(QualType ElementType, SourceLocation Loc, | ||||||
1843 | Sema &SemaRef) { | ||||||
1844 | auto *CXXRD = ElementType->getAsCXXRecordDecl(); | ||||||
1845 | if (!CXXRD) | ||||||
1846 | return false; | ||||||
1847 | |||||||
1848 | CXXDestructorDecl *Destructor = SemaRef.LookupDestructor(CXXRD); | ||||||
1849 | SemaRef.CheckDestructorAccess(Loc, Destructor, | ||||||
1850 | SemaRef.PDiag(diag::err_access_dtor_temp) | ||||||
1851 | << ElementType); | ||||||
1852 | SemaRef.MarkFunctionReferenced(Loc, Destructor); | ||||||
1853 | return SemaRef.DiagnoseUseOfDecl(Destructor, Loc); | ||||||
1854 | } | ||||||
1855 | |||||||
1856 | void InitListChecker::CheckArrayType(const InitializedEntity &Entity, | ||||||
1857 | InitListExpr *IList, QualType &DeclType, | ||||||
1858 | llvm::APSInt elementIndex, | ||||||
1859 | bool SubobjectIsDesignatorContext, | ||||||
1860 | unsigned &Index, | ||||||
1861 | InitListExpr *StructuredList, | ||||||
1862 | unsigned &StructuredIndex) { | ||||||
1863 | const ArrayType *arrayType = SemaRef.Context.getAsArrayType(DeclType); | ||||||
1864 | |||||||
1865 | if (!VerifyOnly) { | ||||||
1866 | if (checkDestructorReference(arrayType->getElementType(), | ||||||
1867 | IList->getEndLoc(), SemaRef)) { | ||||||
1868 | hadError = true; | ||||||
1869 | return; | ||||||
1870 | } | ||||||
1871 | } | ||||||
1872 | |||||||
1873 | // Check for the special-case of initializing an array with a string. | ||||||
1874 | if (Index < IList->getNumInits()) { | ||||||
1875 | if (IsStringInit(IList->getInit(Index), arrayType, SemaRef.Context) == | ||||||
1876 | SIF_None) { | ||||||
1877 | // We place the string literal directly into the resulting | ||||||
1878 | // initializer list. This is the only place where the structure | ||||||
1879 | // of the structured initializer list doesn't match exactly, | ||||||
1880 | // because doing so would involve allocating one character | ||||||
1881 | // constant for each string. | ||||||
1882 | // FIXME: Should we do these checks in verify-only mode too? | ||||||
1883 | if (!VerifyOnly) | ||||||
1884 | CheckStringInit(IList->getInit(Index), DeclType, arrayType, SemaRef); | ||||||
1885 | if (StructuredList) { | ||||||
1886 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||||
1887 | IList->getInit(Index)); | ||||||
1888 | StructuredList->resizeInits(SemaRef.Context, StructuredIndex); | ||||||
1889 | } | ||||||
1890 | ++Index; | ||||||
1891 | return; | ||||||
1892 | } | ||||||
1893 | } | ||||||
1894 | if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(arrayType)) { | ||||||
1895 | // Check for VLAs; in standard C it would be possible to check this | ||||||
1896 | // earlier, but I don't know where clang accepts VLAs (gcc accepts | ||||||
1897 | // them in all sorts of strange places). | ||||||
1898 | if (!VerifyOnly) | ||||||
1899 | SemaRef.Diag(VAT->getSizeExpr()->getBeginLoc(), | ||||||
1900 | diag::err_variable_object_no_init) | ||||||
1901 | << VAT->getSizeExpr()->getSourceRange(); | ||||||
1902 | hadError = true; | ||||||
1903 | ++Index; | ||||||
1904 | ++StructuredIndex; | ||||||
1905 | return; | ||||||
1906 | } | ||||||
1907 | |||||||
1908 | // We might know the maximum number of elements in advance. | ||||||
1909 | llvm::APSInt maxElements(elementIndex.getBitWidth(), | ||||||
1910 | elementIndex.isUnsigned()); | ||||||
1911 | bool maxElementsKnown = false; | ||||||
1912 | if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(arrayType)) { | ||||||
1913 | maxElements = CAT->getSize(); | ||||||
1914 | elementIndex = elementIndex.extOrTrunc(maxElements.getBitWidth()); | ||||||
1915 | elementIndex.setIsUnsigned(maxElements.isUnsigned()); | ||||||
1916 | maxElementsKnown = true; | ||||||
1917 | } | ||||||
1918 | |||||||
1919 | QualType elementType = arrayType->getElementType(); | ||||||
1920 | while (Index < IList->getNumInits()) { | ||||||
1921 | Expr *Init = IList->getInit(Index); | ||||||
1922 | if (DesignatedInitExpr *DIE = dyn_cast<DesignatedInitExpr>(Init)) { | ||||||
1923 | // If we're not the subobject that matches up with the '{' for | ||||||
1924 | // the designator, we shouldn't be handling the | ||||||
1925 | // designator. Return immediately. | ||||||
1926 | if (!SubobjectIsDesignatorContext) | ||||||
1927 | return; | ||||||
1928 | |||||||
1929 | // Handle this designated initializer. elementIndex will be | ||||||
1930 | // updated to be the next array element we'll initialize. | ||||||
1931 | if (CheckDesignatedInitializer(Entity, IList, DIE, 0, | ||||||
1932 | DeclType, nullptr, &elementIndex, Index, | ||||||
1933 | StructuredList, StructuredIndex, true, | ||||||
1934 | false)) { | ||||||
1935 | hadError = true; | ||||||
1936 | continue; | ||||||
1937 | } | ||||||
1938 | |||||||
1939 | if (elementIndex.getBitWidth() > maxElements.getBitWidth()) | ||||||
1940 | maxElements = maxElements.extend(elementIndex.getBitWidth()); | ||||||
1941 | else if (elementIndex.getBitWidth() < maxElements.getBitWidth()) | ||||||
1942 | elementIndex = elementIndex.extend(maxElements.getBitWidth()); | ||||||
1943 | elementIndex.setIsUnsigned(maxElements.isUnsigned()); | ||||||
1944 | |||||||
1945 | // If the array is of incomplete type, keep track of the number of | ||||||
1946 | // elements in the initializer. | ||||||
1947 | if (!maxElementsKnown && elementIndex > maxElements) | ||||||
1948 | maxElements = elementIndex; | ||||||
1949 | |||||||
1950 | continue; | ||||||
1951 | } | ||||||
1952 | |||||||
1953 | // If we know the maximum number of elements, and we've already | ||||||
1954 | // hit it, stop consuming elements in the initializer list. | ||||||
1955 | if (maxElementsKnown && elementIndex == maxElements) | ||||||
1956 | break; | ||||||
1957 | |||||||
1958 | InitializedEntity ElementEntity = | ||||||
1959 | InitializedEntity::InitializeElement(SemaRef.Context, StructuredIndex, | ||||||
1960 | Entity); | ||||||
1961 | // Check this element. | ||||||
1962 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||||
1963 | StructuredList, StructuredIndex); | ||||||
1964 | ++elementIndex; | ||||||
1965 | |||||||
1966 | // If the array is of incomplete type, keep track of the number of | ||||||
1967 | // elements in the initializer. | ||||||
1968 | if (!maxElementsKnown && elementIndex > maxElements) | ||||||
1969 | maxElements = elementIndex; | ||||||
1970 | } | ||||||
1971 | if (!hadError && DeclType->isIncompleteArrayType() && !VerifyOnly) { | ||||||
1972 | // If this is an incomplete array type, the actual type needs to | ||||||
1973 | // be calculated here. | ||||||
1974 | llvm::APSInt Zero(maxElements.getBitWidth(), maxElements.isUnsigned()); | ||||||
1975 | if (maxElements == Zero && !Entity.isVariableLengthArrayNew()) { | ||||||
1976 | // Sizing an array implicitly to zero is not allowed by ISO C, | ||||||
1977 | // but is supported by GNU. | ||||||
1978 | SemaRef.Diag(IList->getBeginLoc(), diag::ext_typecheck_zero_array_size); | ||||||
1979 | } | ||||||
1980 | |||||||
1981 | DeclType = SemaRef.Context.getConstantArrayType( | ||||||
1982 | elementType, maxElements, nullptr, ArrayType::Normal, 0); | ||||||
1983 | } | ||||||
1984 | if (!hadError) { | ||||||
1985 | // If there are any members of the array that get value-initialized, check | ||||||
1986 | // that is possible. That happens if we know the bound and don't have | ||||||
1987 | // enough elements, or if we're performing an array new with an unknown | ||||||
1988 | // bound. | ||||||
1989 | if ((maxElementsKnown && elementIndex < maxElements) || | ||||||
1990 | Entity.isVariableLengthArrayNew()) | ||||||
1991 | CheckEmptyInitializable( | ||||||
1992 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity), | ||||||
1993 | IList->getEndLoc()); | ||||||
1994 | } | ||||||
1995 | } | ||||||
1996 | |||||||
1997 | bool InitListChecker::CheckFlexibleArrayInit(const InitializedEntity &Entity, | ||||||
1998 | Expr *InitExpr, | ||||||
1999 | FieldDecl *Field, | ||||||
2000 | bool TopLevelObject) { | ||||||
2001 | // Handle GNU flexible array initializers. | ||||||
2002 | unsigned FlexArrayDiag; | ||||||
2003 | if (isa<InitListExpr>(InitExpr) && | ||||||
2004 | cast<InitListExpr>(InitExpr)->getNumInits() == 0) { | ||||||
2005 | // Empty flexible array init always allowed as an extension | ||||||
2006 | FlexArrayDiag = diag::ext_flexible_array_init; | ||||||
2007 | } else if (SemaRef.getLangOpts().CPlusPlus) { | ||||||
2008 | // Disallow flexible array init in C++; it is not required for gcc | ||||||
2009 | // compatibility, and it needs work to IRGen correctly in general. | ||||||
2010 | FlexArrayDiag = diag::err_flexible_array_init; | ||||||
2011 | } else if (!TopLevelObject) { | ||||||
2012 | // Disallow flexible array init on non-top-level object | ||||||
2013 | FlexArrayDiag = diag::err_flexible_array_init; | ||||||
2014 | } else if (Entity.getKind() != InitializedEntity::EK_Variable) { | ||||||
2015 | // Disallow flexible array init on anything which is not a variable. | ||||||
2016 | FlexArrayDiag = diag::err_flexible_array_init; | ||||||
2017 | } else if (cast<VarDecl>(Entity.getDecl())->hasLocalStorage()) { | ||||||
2018 | // Disallow flexible array init on local variables. | ||||||
2019 | FlexArrayDiag = diag::err_flexible_array_init; | ||||||
2020 | } else { | ||||||
2021 | // Allow other cases. | ||||||
2022 | FlexArrayDiag = diag::ext_flexible_array_init; | ||||||
2023 | } | ||||||
2024 | |||||||
2025 | if (!VerifyOnly) { | ||||||
2026 | SemaRef.Diag(InitExpr->getBeginLoc(), FlexArrayDiag) | ||||||
2027 | << InitExpr->getBeginLoc(); | ||||||
2028 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||||
2029 | << Field; | ||||||
2030 | } | ||||||
2031 | |||||||
2032 | return FlexArrayDiag != diag::ext_flexible_array_init; | ||||||
2033 | } | ||||||
2034 | |||||||
2035 | void InitListChecker::CheckStructUnionTypes( | ||||||
2036 | const InitializedEntity &Entity, InitListExpr *IList, QualType DeclType, | ||||||
2037 | CXXRecordDecl::base_class_range Bases, RecordDecl::field_iterator Field, | ||||||
2038 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||||
2039 | InitListExpr *StructuredList, unsigned &StructuredIndex, | ||||||
2040 | bool TopLevelObject) { | ||||||
2041 | RecordDecl *structDecl = DeclType->castAs<RecordType>()->getDecl(); | ||||||
2042 | |||||||
2043 | // If the record is invalid, some of it's members are invalid. To avoid | ||||||
2044 | // confusion, we forgo checking the intializer for the entire record. | ||||||
2045 | if (structDecl->isInvalidDecl()) { | ||||||
2046 | // Assume it was supposed to consume a single initializer. | ||||||
2047 | ++Index; | ||||||
2048 | hadError = true; | ||||||
2049 | return; | ||||||
2050 | } | ||||||
2051 | |||||||
2052 | if (DeclType->isUnionType() && IList->getNumInits() == 0) { | ||||||
2053 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||||
2054 | |||||||
2055 | if (!VerifyOnly) | ||||||
2056 | for (FieldDecl *FD : RD->fields()) { | ||||||
2057 | QualType ET = SemaRef.Context.getBaseElementType(FD->getType()); | ||||||
2058 | if (checkDestructorReference(ET, IList->getEndLoc(), SemaRef)) { | ||||||
2059 | hadError = true; | ||||||
2060 | return; | ||||||
2061 | } | ||||||
2062 | } | ||||||
2063 | |||||||
2064 | // If there's a default initializer, use it. | ||||||
2065 | if (isa<CXXRecordDecl>(RD) && | ||||||
2066 | cast<CXXRecordDecl>(RD)->hasInClassInitializer()) { | ||||||
2067 | if (!StructuredList) | ||||||
2068 | return; | ||||||
2069 | for (RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||||
2070 | Field != FieldEnd; ++Field) { | ||||||
2071 | if (Field->hasInClassInitializer()) { | ||||||
2072 | StructuredList->setInitializedFieldInUnion(*Field); | ||||||
2073 | // FIXME: Actually build a CXXDefaultInitExpr? | ||||||
2074 | return; | ||||||
2075 | } | ||||||
2076 | } | ||||||
2077 | } | ||||||
2078 | |||||||
2079 | // Value-initialize the first member of the union that isn't an unnamed | ||||||
2080 | // bitfield. | ||||||
2081 | for (RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||||
2082 | Field != FieldEnd; ++Field) { | ||||||
2083 | if (!Field->isUnnamedBitfield()) { | ||||||
2084 | CheckEmptyInitializable( | ||||||
2085 | InitializedEntity::InitializeMember(*Field, &Entity), | ||||||
2086 | IList->getEndLoc()); | ||||||
2087 | if (StructuredList) | ||||||
2088 | StructuredList->setInitializedFieldInUnion(*Field); | ||||||
2089 | break; | ||||||
2090 | } | ||||||
2091 | } | ||||||
2092 | return; | ||||||
2093 | } | ||||||
2094 | |||||||
2095 | bool InitializedSomething = false; | ||||||
2096 | |||||||
2097 | // If we have any base classes, they are initialized prior to the fields. | ||||||
2098 | for (auto &Base : Bases) { | ||||||
2099 | Expr *Init = Index < IList->getNumInits() ? IList->getInit(Index) : nullptr; | ||||||
2100 | |||||||
2101 | // Designated inits always initialize fields, so if we see one, all | ||||||
2102 | // remaining base classes have no explicit initializer. | ||||||
2103 | if (Init && isa<DesignatedInitExpr>(Init)) | ||||||
2104 | Init = nullptr; | ||||||
2105 | |||||||
2106 | SourceLocation InitLoc = Init ? Init->getBeginLoc() : IList->getEndLoc(); | ||||||
2107 | InitializedEntity BaseEntity = InitializedEntity::InitializeBase( | ||||||
2108 | SemaRef.Context, &Base, false, &Entity); | ||||||
2109 | if (Init) { | ||||||
2110 | CheckSubElementType(BaseEntity, IList, Base.getType(), Index, | ||||||
2111 | StructuredList, StructuredIndex); | ||||||
2112 | InitializedSomething = true; | ||||||
2113 | } else { | ||||||
2114 | CheckEmptyInitializable(BaseEntity, InitLoc); | ||||||
2115 | } | ||||||
2116 | |||||||
2117 | if (!VerifyOnly) | ||||||
2118 | if (checkDestructorReference(Base.getType(), InitLoc, SemaRef)) { | ||||||
2119 | hadError = true; | ||||||
2120 | return; | ||||||
2121 | } | ||||||
2122 | } | ||||||
2123 | |||||||
2124 | // If structDecl is a forward declaration, this loop won't do | ||||||
2125 | // anything except look at designated initializers; That's okay, | ||||||
2126 | // because an error should get printed out elsewhere. It might be | ||||||
2127 | // worthwhile to skip over the rest of the initializer, though. | ||||||
2128 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||||
2129 | RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||||
2130 | bool CheckForMissingFields = | ||||||
2131 | !IList->isIdiomaticZeroInitializer(SemaRef.getLangOpts()); | ||||||
2132 | bool HasDesignatedInit = false; | ||||||
2133 | |||||||
2134 | while (Index < IList->getNumInits()) { | ||||||
2135 | Expr *Init = IList->getInit(Index); | ||||||
2136 | SourceLocation InitLoc = Init->getBeginLoc(); | ||||||
2137 | |||||||
2138 | if (DesignatedInitExpr *DIE = dyn_cast<DesignatedInitExpr>(Init)) { | ||||||
2139 | // If we're not the subobject that matches up with the '{' for | ||||||
2140 | // the designator, we shouldn't be handling the | ||||||
2141 | // designator. Return immediately. | ||||||
2142 | if (!SubobjectIsDesignatorContext) | ||||||
2143 | return; | ||||||
2144 | |||||||
2145 | HasDesignatedInit = true; | ||||||
2146 | |||||||
2147 | // Handle this designated initializer. Field will be updated to | ||||||
2148 | // the next field that we'll be initializing. | ||||||
2149 | if (CheckDesignatedInitializer(Entity, IList, DIE, 0, | ||||||
2150 | DeclType, &Field, nullptr, Index, | ||||||
2151 | StructuredList, StructuredIndex, | ||||||
2152 | true, TopLevelObject)) | ||||||
2153 | hadError = true; | ||||||
2154 | else if (!VerifyOnly) { | ||||||
2155 | // Find the field named by the designated initializer. | ||||||
2156 | RecordDecl::field_iterator F = RD->field_begin(); | ||||||
2157 | while (std::next(F) != Field) | ||||||
2158 | ++F; | ||||||
2159 | QualType ET = SemaRef.Context.getBaseElementType(F->getType()); | ||||||
2160 | if (checkDestructorReference(ET, InitLoc, SemaRef)) { | ||||||
2161 | hadError = true; | ||||||
2162 | return; | ||||||
2163 | } | ||||||
2164 | } | ||||||
2165 | |||||||
2166 | InitializedSomething = true; | ||||||
2167 | |||||||
2168 | // Disable check for missing fields when designators are used. | ||||||
2169 | // This matches gcc behaviour. | ||||||
2170 | CheckForMissingFields = false; | ||||||
2171 | continue; | ||||||
2172 | } | ||||||
2173 | |||||||
2174 | if (Field == FieldEnd) { | ||||||
2175 | // We've run out of fields. We're done. | ||||||
2176 | break; | ||||||
2177 | } | ||||||
2178 | |||||||
2179 | // We've already initialized a member of a union. We're done. | ||||||
2180 | if (InitializedSomething && DeclType->isUnionType()) | ||||||
2181 | break; | ||||||
2182 | |||||||
2183 | // If we've hit the flexible array member at the end, we're done. | ||||||
2184 | if (Field->getType()->isIncompleteArrayType()) | ||||||
2185 | break; | ||||||
2186 | |||||||
2187 | if (Field->isUnnamedBitfield()) { | ||||||
2188 | // Don't initialize unnamed bitfields, e.g. "int : 20;" | ||||||
2189 | ++Field; | ||||||
2190 | continue; | ||||||
2191 | } | ||||||
2192 | |||||||
2193 | // Make sure we can use this declaration. | ||||||
2194 | bool InvalidUse; | ||||||
2195 | if (VerifyOnly) | ||||||
2196 | InvalidUse = !SemaRef.CanUseDecl(*Field, TreatUnavailableAsInvalid); | ||||||
2197 | else | ||||||
2198 | InvalidUse = SemaRef.DiagnoseUseOfDecl( | ||||||
2199 | *Field, IList->getInit(Index)->getBeginLoc()); | ||||||
2200 | if (InvalidUse) { | ||||||
2201 | ++Index; | ||||||
2202 | ++Field; | ||||||
2203 | hadError = true; | ||||||
2204 | continue; | ||||||
2205 | } | ||||||
2206 | |||||||
2207 | if (!VerifyOnly) { | ||||||
2208 | QualType ET = SemaRef.Context.getBaseElementType(Field->getType()); | ||||||
2209 | if (checkDestructorReference(ET, InitLoc, SemaRef)) { | ||||||
2210 | hadError = true; | ||||||
2211 | return; | ||||||
2212 | } | ||||||
2213 | } | ||||||
2214 | |||||||
2215 | InitializedEntity MemberEntity = | ||||||
2216 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||||
2217 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||||
2218 | StructuredList, StructuredIndex); | ||||||
2219 | InitializedSomething = true; | ||||||
2220 | |||||||
2221 | if (DeclType->isUnionType() && StructuredList) { | ||||||
2222 | // Initialize the first field within the union. | ||||||
2223 | StructuredList->setInitializedFieldInUnion(*Field); | ||||||
2224 | } | ||||||
2225 | |||||||
2226 | ++Field; | ||||||
2227 | } | ||||||
2228 | |||||||
2229 | // Emit warnings for missing struct field initializers. | ||||||
2230 | if (!VerifyOnly && InitializedSomething && CheckForMissingFields && | ||||||
2231 | Field != FieldEnd && !Field->getType()->isIncompleteArrayType() && | ||||||
2232 | !DeclType->isUnionType()) { | ||||||
2233 | // It is possible we have one or more unnamed bitfields remaining. | ||||||
2234 | // Find first (if any) named field and emit warning. | ||||||
2235 | for (RecordDecl::field_iterator it = Field, end = RD->field_end(); | ||||||
2236 | it != end; ++it) { | ||||||
2237 | if (!it->isUnnamedBitfield() && !it->hasInClassInitializer()) { | ||||||
2238 | SemaRef.Diag(IList->getSourceRange().getEnd(), | ||||||
2239 | diag::warn_missing_field_initializers) << *it; | ||||||
2240 | break; | ||||||
2241 | } | ||||||
2242 | } | ||||||
2243 | } | ||||||
2244 | |||||||
2245 | // Check that any remaining fields can be value-initialized if we're not | ||||||
2246 | // building a structured list. (If we are, we'll check this later.) | ||||||
2247 | if (!StructuredList && Field != FieldEnd && !DeclType->isUnionType() && | ||||||
2248 | !Field->getType()->isIncompleteArrayType()) { | ||||||
2249 | for (; Field != FieldEnd && !hadError; ++Field) { | ||||||
2250 | if (!Field->isUnnamedBitfield() && !Field->hasInClassInitializer()) | ||||||
2251 | CheckEmptyInitializable( | ||||||
2252 | InitializedEntity::InitializeMember(*Field, &Entity), | ||||||
2253 | IList->getEndLoc()); | ||||||
2254 | } | ||||||
2255 | } | ||||||
2256 | |||||||
2257 | // Check that the types of the remaining fields have accessible destructors. | ||||||
2258 | if (!VerifyOnly) { | ||||||
2259 | // If the initializer expression has a designated initializer, check the | ||||||
2260 | // elements for which a designated initializer is not provided too. | ||||||
2261 | RecordDecl::field_iterator I = HasDesignatedInit ? RD->field_begin() | ||||||
2262 | : Field; | ||||||
2263 | for (RecordDecl::field_iterator E = RD->field_end(); I != E; ++I) { | ||||||
2264 | QualType ET = SemaRef.Context.getBaseElementType(I->getType()); | ||||||
2265 | if (checkDestructorReference(ET, IList->getEndLoc(), SemaRef)) { | ||||||
2266 | hadError = true; | ||||||
2267 | return; | ||||||
2268 | } | ||||||
2269 | } | ||||||
2270 | } | ||||||
2271 | |||||||
2272 | if (Field == FieldEnd || !Field->getType()->isIncompleteArrayType() || | ||||||
2273 | Index >= IList->getNumInits()) | ||||||
2274 | return; | ||||||
2275 | |||||||
2276 | if (CheckFlexibleArrayInit(Entity, IList->getInit(Index), *Field, | ||||||
2277 | TopLevelObject)) { | ||||||
2278 | hadError = true; | ||||||
2279 | ++Index; | ||||||
2280 | return; | ||||||
2281 | } | ||||||
2282 | |||||||
2283 | InitializedEntity MemberEntity = | ||||||
2284 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||||
2285 | |||||||
2286 | if (isa<InitListExpr>(IList->getInit(Index))) | ||||||
2287 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||||
2288 | StructuredList, StructuredIndex); | ||||||
2289 | else | ||||||
2290 | CheckImplicitInitList(MemberEntity, IList, Field->getType(), Index, | ||||||
2291 | StructuredList, StructuredIndex); | ||||||
2292 | } | ||||||
2293 | |||||||
2294 | /// Expand a field designator that refers to a member of an | ||||||
2295 | /// anonymous struct or union into a series of field designators that | ||||||
2296 | /// refers to the field within the appropriate subobject. | ||||||
2297 | /// | ||||||
2298 | static void ExpandAnonymousFieldDesignator(Sema &SemaRef, | ||||||
2299 | DesignatedInitExpr *DIE, | ||||||
2300 | unsigned DesigIdx, | ||||||
2301 | IndirectFieldDecl *IndirectField) { | ||||||
2302 | typedef DesignatedInitExpr::Designator Designator; | ||||||
2303 | |||||||
2304 | // Build the replacement designators. | ||||||
2305 | SmallVector<Designator, 4> Replacements; | ||||||
2306 | for (IndirectFieldDecl::chain_iterator PI = IndirectField->chain_begin(), | ||||||
2307 | PE = IndirectField->chain_end(); PI != PE; ++PI) { | ||||||
2308 | if (PI + 1 == PE) | ||||||
2309 | Replacements.push_back(Designator((IdentifierInfo *)nullptr, | ||||||
2310 | DIE->getDesignator(DesigIdx)->getDotLoc(), | ||||||
2311 | DIE->getDesignator(DesigIdx)->getFieldLoc())); | ||||||
2312 | else | ||||||
2313 | Replacements.push_back(Designator((IdentifierInfo *)nullptr, | ||||||
2314 | SourceLocation(), SourceLocation())); | ||||||
2315 | assert(isa<FieldDecl>(*PI))(static_cast <bool> (isa<FieldDecl>(*PI)) ? void ( 0) : __assert_fail ("isa<FieldDecl>(*PI)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2315, __extension__ __PRETTY_FUNCTION__)); | ||||||
2316 | Replacements.back().setField(cast<FieldDecl>(*PI)); | ||||||
2317 | } | ||||||
2318 | |||||||
2319 | // Expand the current designator into the set of replacement | ||||||
2320 | // designators, so we have a full subobject path down to where the | ||||||
2321 | // member of the anonymous struct/union is actually stored. | ||||||
2322 | DIE->ExpandDesignator(SemaRef.Context, DesigIdx, &Replacements[0], | ||||||
2323 | &Replacements[0] + Replacements.size()); | ||||||
2324 | } | ||||||
2325 | |||||||
2326 | static DesignatedInitExpr *CloneDesignatedInitExpr(Sema &SemaRef, | ||||||
2327 | DesignatedInitExpr *DIE) { | ||||||
2328 | unsigned NumIndexExprs = DIE->getNumSubExprs() - 1; | ||||||
2329 | SmallVector<Expr*, 4> IndexExprs(NumIndexExprs); | ||||||
2330 | for (unsigned I = 0; I < NumIndexExprs; ++I) | ||||||
2331 | IndexExprs[I] = DIE->getSubExpr(I + 1); | ||||||
2332 | return DesignatedInitExpr::Create(SemaRef.Context, DIE->designators(), | ||||||
2333 | IndexExprs, | ||||||
2334 | DIE->getEqualOrColonLoc(), | ||||||
2335 | DIE->usesGNUSyntax(), DIE->getInit()); | ||||||
2336 | } | ||||||
2337 | |||||||
2338 | namespace { | ||||||
2339 | |||||||
2340 | // Callback to only accept typo corrections that are for field members of | ||||||
2341 | // the given struct or union. | ||||||
2342 | class FieldInitializerValidatorCCC final : public CorrectionCandidateCallback { | ||||||
2343 | public: | ||||||
2344 | explicit FieldInitializerValidatorCCC(RecordDecl *RD) | ||||||
2345 | : Record(RD) {} | ||||||
2346 | |||||||
2347 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
2348 | FieldDecl *FD = candidate.getCorrectionDeclAs<FieldDecl>(); | ||||||
2349 | return FD && FD->getDeclContext()->getRedeclContext()->Equals(Record); | ||||||
2350 | } | ||||||
2351 | |||||||
2352 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
2353 | return std::make_unique<FieldInitializerValidatorCCC>(*this); | ||||||
2354 | } | ||||||
2355 | |||||||
2356 | private: | ||||||
2357 | RecordDecl *Record; | ||||||
2358 | }; | ||||||
2359 | |||||||
2360 | } // end anonymous namespace | ||||||
2361 | |||||||
2362 | /// Check the well-formedness of a C99 designated initializer. | ||||||
2363 | /// | ||||||
2364 | /// Determines whether the designated initializer @p DIE, which | ||||||
2365 | /// resides at the given @p Index within the initializer list @p | ||||||
2366 | /// IList, is well-formed for a current object of type @p DeclType | ||||||
2367 | /// (C99 6.7.8). The actual subobject that this designator refers to | ||||||
2368 | /// within the current subobject is returned in either | ||||||
2369 | /// @p NextField or @p NextElementIndex (whichever is appropriate). | ||||||
2370 | /// | ||||||
2371 | /// @param IList The initializer list in which this designated | ||||||
2372 | /// initializer occurs. | ||||||
2373 | /// | ||||||
2374 | /// @param DIE The designated initializer expression. | ||||||
2375 | /// | ||||||
2376 | /// @param DesigIdx The index of the current designator. | ||||||
2377 | /// | ||||||
2378 | /// @param CurrentObjectType The type of the "current object" (C99 6.7.8p17), | ||||||
2379 | /// into which the designation in @p DIE should refer. | ||||||
2380 | /// | ||||||
2381 | /// @param NextField If non-NULL and the first designator in @p DIE is | ||||||
2382 | /// a field, this will be set to the field declaration corresponding | ||||||
2383 | /// to the field named by the designator. On input, this is expected to be | ||||||
2384 | /// the next field that would be initialized in the absence of designation, | ||||||
2385 | /// if the complete object being initialized is a struct. | ||||||
2386 | /// | ||||||
2387 | /// @param NextElementIndex If non-NULL and the first designator in @p | ||||||
2388 | /// DIE is an array designator or GNU array-range designator, this | ||||||
2389 | /// will be set to the last index initialized by this designator. | ||||||
2390 | /// | ||||||
2391 | /// @param Index Index into @p IList where the designated initializer | ||||||
2392 | /// @p DIE occurs. | ||||||
2393 | /// | ||||||
2394 | /// @param StructuredList The initializer list expression that | ||||||
2395 | /// describes all of the subobject initializers in the order they'll | ||||||
2396 | /// actually be initialized. | ||||||
2397 | /// | ||||||
2398 | /// @returns true if there was an error, false otherwise. | ||||||
2399 | bool | ||||||
2400 | InitListChecker::CheckDesignatedInitializer(const InitializedEntity &Entity, | ||||||
2401 | InitListExpr *IList, | ||||||
2402 | DesignatedInitExpr *DIE, | ||||||
2403 | unsigned DesigIdx, | ||||||
2404 | QualType &CurrentObjectType, | ||||||
2405 | RecordDecl::field_iterator *NextField, | ||||||
2406 | llvm::APSInt *NextElementIndex, | ||||||
2407 | unsigned &Index, | ||||||
2408 | InitListExpr *StructuredList, | ||||||
2409 | unsigned &StructuredIndex, | ||||||
2410 | bool FinishSubobjectInit, | ||||||
2411 | bool TopLevelObject) { | ||||||
2412 | if (DesigIdx == DIE->size()) { | ||||||
2413 | // C++20 designated initialization can result in direct-list-initialization | ||||||
2414 | // of the designated subobject. This is the only way that we can end up | ||||||
2415 | // performing direct initialization as part of aggregate initialization, so | ||||||
2416 | // it needs special handling. | ||||||
2417 | if (DIE->isDirectInit()) { | ||||||
2418 | Expr *Init = DIE->getInit(); | ||||||
2419 | assert(isa<InitListExpr>(Init) &&(static_cast <bool> (isa<InitListExpr>(Init) && "designator result in direct non-list initialization?") ? void (0) : __assert_fail ("isa<InitListExpr>(Init) && \"designator result in direct non-list initialization?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2420, __extension__ __PRETTY_FUNCTION__)) | ||||||
2420 | "designator result in direct non-list initialization?")(static_cast <bool> (isa<InitListExpr>(Init) && "designator result in direct non-list initialization?") ? void (0) : __assert_fail ("isa<InitListExpr>(Init) && \"designator result in direct non-list initialization?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2420, __extension__ __PRETTY_FUNCTION__)); | ||||||
2421 | InitializationKind Kind = InitializationKind::CreateDirectList( | ||||||
2422 | DIE->getBeginLoc(), Init->getBeginLoc(), Init->getEndLoc()); | ||||||
2423 | InitializationSequence Seq(SemaRef, Entity, Kind, Init, | ||||||
2424 | /*TopLevelOfInitList*/ true); | ||||||
2425 | if (StructuredList) { | ||||||
2426 | ExprResult Result = VerifyOnly | ||||||
2427 | ? getDummyInit() | ||||||
2428 | : Seq.Perform(SemaRef, Entity, Kind, Init); | ||||||
2429 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||||
2430 | Result.get()); | ||||||
2431 | } | ||||||
2432 | ++Index; | ||||||
2433 | return !Seq; | ||||||
2434 | } | ||||||
2435 | |||||||
2436 | // Check the actual initialization for the designated object type. | ||||||
2437 | bool prevHadError = hadError; | ||||||
2438 | |||||||
2439 | // Temporarily remove the designator expression from the | ||||||
2440 | // initializer list that the child calls see, so that we don't try | ||||||
2441 | // to re-process the designator. | ||||||
2442 | unsigned OldIndex = Index; | ||||||
2443 | IList->setInit(OldIndex, DIE->getInit()); | ||||||
2444 | |||||||
2445 | CheckSubElementType(Entity, IList, CurrentObjectType, Index, StructuredList, | ||||||
2446 | StructuredIndex, /*DirectlyDesignated=*/true); | ||||||
2447 | |||||||
2448 | // Restore the designated initializer expression in the syntactic | ||||||
2449 | // form of the initializer list. | ||||||
2450 | if (IList->getInit(OldIndex) != DIE->getInit()) | ||||||
2451 | DIE->setInit(IList->getInit(OldIndex)); | ||||||
2452 | IList->setInit(OldIndex, DIE); | ||||||
2453 | |||||||
2454 | return hadError && !prevHadError; | ||||||
2455 | } | ||||||
2456 | |||||||
2457 | DesignatedInitExpr::Designator *D = DIE->getDesignator(DesigIdx); | ||||||
2458 | bool IsFirstDesignator = (DesigIdx == 0); | ||||||
2459 | if (IsFirstDesignator ? FullyStructuredList : StructuredList) { | ||||||
2460 | // Determine the structural initializer list that corresponds to the | ||||||
2461 | // current subobject. | ||||||
2462 | if (IsFirstDesignator) | ||||||
2463 | StructuredList = FullyStructuredList; | ||||||
2464 | else { | ||||||
2465 | Expr *ExistingInit = StructuredIndex < StructuredList->getNumInits() ? | ||||||
2466 | StructuredList->getInit(StructuredIndex) : nullptr; | ||||||
2467 | if (!ExistingInit && StructuredList->hasArrayFiller()) | ||||||
2468 | ExistingInit = StructuredList->getArrayFiller(); | ||||||
2469 | |||||||
2470 | if (!ExistingInit) | ||||||
2471 | StructuredList = getStructuredSubobjectInit( | ||||||
2472 | IList, Index, CurrentObjectType, StructuredList, StructuredIndex, | ||||||
2473 | SourceRange(D->getBeginLoc(), DIE->getEndLoc())); | ||||||
2474 | else if (InitListExpr *Result = dyn_cast<InitListExpr>(ExistingInit)) | ||||||
2475 | StructuredList = Result; | ||||||
2476 | else { | ||||||
2477 | // We are creating an initializer list that initializes the | ||||||
2478 | // subobjects of the current object, but there was already an | ||||||
2479 | // initialization that completely initialized the current | ||||||
2480 | // subobject, e.g., by a compound literal: | ||||||
2481 | // | ||||||
2482 | // struct X { int a, b; }; | ||||||
2483 | // struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 }; | ||||||
2484 | // | ||||||
2485 | // Here, xs[0].a == 1 and xs[0].b == 3, since the second, | ||||||
2486 | // designated initializer re-initializes only its current object | ||||||
2487 | // subobject [0].b. | ||||||
2488 | diagnoseInitOverride(ExistingInit, | ||||||
2489 | SourceRange(D->getBeginLoc(), DIE->getEndLoc()), | ||||||
2490 | /*FullyOverwritten=*/false); | ||||||
2491 | |||||||
2492 | if (!VerifyOnly) { | ||||||
2493 | if (DesignatedInitUpdateExpr *E = | ||||||
2494 | dyn_cast<DesignatedInitUpdateExpr>(ExistingInit)) | ||||||
2495 | StructuredList = E->getUpdater(); | ||||||
2496 | else { | ||||||
2497 | DesignatedInitUpdateExpr *DIUE = new (SemaRef.Context) | ||||||
2498 | DesignatedInitUpdateExpr(SemaRef.Context, D->getBeginLoc(), | ||||||
2499 | ExistingInit, DIE->getEndLoc()); | ||||||
2500 | StructuredList->updateInit(SemaRef.Context, StructuredIndex, DIUE); | ||||||
2501 | StructuredList = DIUE->getUpdater(); | ||||||
2502 | } | ||||||
2503 | } else { | ||||||
2504 | // We don't need to track the structured representation of a | ||||||
2505 | // designated init update of an already-fully-initialized object in | ||||||
2506 | // verify-only mode. The only reason we would need the structure is | ||||||
2507 | // to determine where the uninitialized "holes" are, and in this | ||||||
2508 | // case, we know there aren't any and we can't introduce any. | ||||||
2509 | StructuredList = nullptr; | ||||||
2510 | } | ||||||
2511 | } | ||||||
2512 | } | ||||||
2513 | } | ||||||
2514 | |||||||
2515 | if (D->isFieldDesignator()) { | ||||||
2516 | // C99 6.7.8p7: | ||||||
2517 | // | ||||||
2518 | // If a designator has the form | ||||||
2519 | // | ||||||
2520 | // . identifier | ||||||
2521 | // | ||||||
2522 | // then the current object (defined below) shall have | ||||||
2523 | // structure or union type and the identifier shall be the | ||||||
2524 | // name of a member of that type. | ||||||
2525 | const RecordType *RT = CurrentObjectType->getAs<RecordType>(); | ||||||
2526 | if (!RT) { | ||||||
2527 | SourceLocation Loc = D->getDotLoc(); | ||||||
2528 | if (Loc.isInvalid()) | ||||||
2529 | Loc = D->getFieldLoc(); | ||||||
2530 | if (!VerifyOnly) | ||||||
2531 | SemaRef.Diag(Loc, diag::err_field_designator_non_aggr) | ||||||
2532 | << SemaRef.getLangOpts().CPlusPlus << CurrentObjectType; | ||||||
2533 | ++Index; | ||||||
2534 | return true; | ||||||
2535 | } | ||||||
2536 | |||||||
2537 | FieldDecl *KnownField = D->getField(); | ||||||
2538 | if (!KnownField) { | ||||||
2539 | IdentifierInfo *FieldName = D->getFieldName(); | ||||||
2540 | DeclContext::lookup_result Lookup = RT->getDecl()->lookup(FieldName); | ||||||
2541 | for (NamedDecl *ND : Lookup) { | ||||||
2542 | if (auto *FD = dyn_cast<FieldDecl>(ND)) { | ||||||
2543 | KnownField = FD; | ||||||
2544 | break; | ||||||
2545 | } | ||||||
2546 | if (auto *IFD = dyn_cast<IndirectFieldDecl>(ND)) { | ||||||
2547 | // In verify mode, don't modify the original. | ||||||
2548 | if (VerifyOnly) | ||||||
2549 | DIE = CloneDesignatedInitExpr(SemaRef, DIE); | ||||||
2550 | ExpandAnonymousFieldDesignator(SemaRef, DIE, DesigIdx, IFD); | ||||||
2551 | D = DIE->getDesignator(DesigIdx); | ||||||
2552 | KnownField = cast<FieldDecl>(*IFD->chain_begin()); | ||||||
2553 | break; | ||||||
2554 | } | ||||||
2555 | } | ||||||
2556 | if (!KnownField) { | ||||||
2557 | if (VerifyOnly) { | ||||||
2558 | ++Index; | ||||||
2559 | return true; // No typo correction when just trying this out. | ||||||
2560 | } | ||||||
2561 | |||||||
2562 | // Name lookup found something, but it wasn't a field. | ||||||
2563 | if (!Lookup.empty()) { | ||||||
2564 | SemaRef.Diag(D->getFieldLoc(), diag::err_field_designator_nonfield) | ||||||
2565 | << FieldName; | ||||||
2566 | SemaRef.Diag(Lookup.front()->getLocation(), | ||||||
2567 | diag::note_field_designator_found); | ||||||
2568 | ++Index; | ||||||
2569 | return true; | ||||||
2570 | } | ||||||
2571 | |||||||
2572 | // Name lookup didn't find anything. | ||||||
2573 | // Determine whether this was a typo for another field name. | ||||||
2574 | FieldInitializerValidatorCCC CCC(RT->getDecl()); | ||||||
2575 | if (TypoCorrection Corrected = SemaRef.CorrectTypo( | ||||||
2576 | DeclarationNameInfo(FieldName, D->getFieldLoc()), | ||||||
2577 | Sema::LookupMemberName, /*Scope=*/nullptr, /*SS=*/nullptr, CCC, | ||||||
2578 | Sema::CTK_ErrorRecovery, RT->getDecl())) { | ||||||
2579 | SemaRef.diagnoseTypo( | ||||||
2580 | Corrected, | ||||||
2581 | SemaRef.PDiag(diag::err_field_designator_unknown_suggest) | ||||||
2582 | << FieldName << CurrentObjectType); | ||||||
2583 | KnownField = Corrected.getCorrectionDeclAs<FieldDecl>(); | ||||||
2584 | hadError = true; | ||||||
2585 | } else { | ||||||
2586 | // Typo correction didn't find anything. | ||||||
2587 | SemaRef.Diag(D->getFieldLoc(), diag::err_field_designator_unknown) | ||||||
2588 | << FieldName << CurrentObjectType; | ||||||
2589 | ++Index; | ||||||
2590 | return true; | ||||||
2591 | } | ||||||
2592 | } | ||||||
2593 | } | ||||||
2594 | |||||||
2595 | unsigned NumBases = 0; | ||||||
2596 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RT->getDecl())) | ||||||
2597 | NumBases = CXXRD->getNumBases(); | ||||||
2598 | |||||||
2599 | unsigned FieldIndex = NumBases; | ||||||
2600 | |||||||
2601 | for (auto *FI : RT->getDecl()->fields()) { | ||||||
2602 | if (FI->isUnnamedBitfield()) | ||||||
2603 | continue; | ||||||
2604 | if (declaresSameEntity(KnownField, FI)) { | ||||||
2605 | KnownField = FI; | ||||||
2606 | break; | ||||||
2607 | } | ||||||
2608 | ++FieldIndex; | ||||||
2609 | } | ||||||
2610 | |||||||
2611 | RecordDecl::field_iterator Field = | ||||||
2612 | RecordDecl::field_iterator(DeclContext::decl_iterator(KnownField)); | ||||||
2613 | |||||||
2614 | // All of the fields of a union are located at the same place in | ||||||
2615 | // the initializer list. | ||||||
2616 | if (RT->getDecl()->isUnion()) { | ||||||
2617 | FieldIndex = 0; | ||||||
2618 | if (StructuredList) { | ||||||
2619 | FieldDecl *CurrentField = StructuredList->getInitializedFieldInUnion(); | ||||||
2620 | if (CurrentField && !declaresSameEntity(CurrentField, *Field)) { | ||||||
2621 | assert(StructuredList->getNumInits() == 1(static_cast <bool> (StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!" ) ? void (0) : __assert_fail ("StructuredList->getNumInits() == 1 && \"A union should never have more than one initializer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2622, __extension__ __PRETTY_FUNCTION__)) | ||||||
2622 | && "A union should never have more than one initializer!")(static_cast <bool> (StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!" ) ? void (0) : __assert_fail ("StructuredList->getNumInits() == 1 && \"A union should never have more than one initializer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2622, __extension__ __PRETTY_FUNCTION__)); | ||||||
2623 | |||||||
2624 | Expr *ExistingInit = StructuredList->getInit(0); | ||||||
2625 | if (ExistingInit) { | ||||||
2626 | // We're about to throw away an initializer, emit warning. | ||||||
2627 | diagnoseInitOverride( | ||||||
2628 | ExistingInit, SourceRange(D->getBeginLoc(), DIE->getEndLoc())); | ||||||
2629 | } | ||||||
2630 | |||||||
2631 | // remove existing initializer | ||||||
2632 | StructuredList->resizeInits(SemaRef.Context, 0); | ||||||
2633 | StructuredList->setInitializedFieldInUnion(nullptr); | ||||||
2634 | } | ||||||
2635 | |||||||
2636 | StructuredList->setInitializedFieldInUnion(*Field); | ||||||
2637 | } | ||||||
2638 | } | ||||||
2639 | |||||||
2640 | // Make sure we can use this declaration. | ||||||
2641 | bool InvalidUse; | ||||||
2642 | if (VerifyOnly) | ||||||
2643 | InvalidUse = !SemaRef.CanUseDecl(*Field, TreatUnavailableAsInvalid); | ||||||
2644 | else | ||||||
2645 | InvalidUse = SemaRef.DiagnoseUseOfDecl(*Field, D->getFieldLoc()); | ||||||
2646 | if (InvalidUse) { | ||||||
2647 | ++Index; | ||||||
2648 | return true; | ||||||
2649 | } | ||||||
2650 | |||||||
2651 | // C++20 [dcl.init.list]p3: | ||||||
2652 | // The ordered identifiers in the designators of the designated- | ||||||
2653 | // initializer-list shall form a subsequence of the ordered identifiers | ||||||
2654 | // in the direct non-static data members of T. | ||||||
2655 | // | ||||||
2656 | // Note that this is not a condition on forming the aggregate | ||||||
2657 | // initialization, only on actually performing initialization, | ||||||
2658 | // so it is not checked in VerifyOnly mode. | ||||||
2659 | // | ||||||
2660 | // FIXME: This is the only reordering diagnostic we produce, and it only | ||||||
2661 | // catches cases where we have a top-level field designator that jumps | ||||||
2662 | // backwards. This is the only such case that is reachable in an | ||||||
2663 | // otherwise-valid C++20 program, so is the only case that's required for | ||||||
2664 | // conformance, but for consistency, we should diagnose all the other | ||||||
2665 | // cases where a designator takes us backwards too. | ||||||
2666 | if (IsFirstDesignator && !VerifyOnly && SemaRef.getLangOpts().CPlusPlus && | ||||||
2667 | NextField && | ||||||
2668 | (*NextField == RT->getDecl()->field_end() || | ||||||
2669 | (*NextField)->getFieldIndex() > Field->getFieldIndex() + 1)) { | ||||||
2670 | // Find the field that we just initialized. | ||||||
2671 | FieldDecl *PrevField = nullptr; | ||||||
2672 | for (auto FI = RT->getDecl()->field_begin(); | ||||||
2673 | FI != RT->getDecl()->field_end(); ++FI) { | ||||||
2674 | if (FI->isUnnamedBitfield()) | ||||||
2675 | continue; | ||||||
2676 | if (*NextField != RT->getDecl()->field_end() && | ||||||
2677 | declaresSameEntity(*FI, **NextField)) | ||||||
2678 | break; | ||||||
2679 | PrevField = *FI; | ||||||
2680 | } | ||||||
2681 | |||||||
2682 | if (PrevField && | ||||||
2683 | PrevField->getFieldIndex() > KnownField->getFieldIndex()) { | ||||||
2684 | SemaRef.Diag(DIE->getBeginLoc(), diag::ext_designated_init_reordered) | ||||||
2685 | << KnownField << PrevField << DIE->getSourceRange(); | ||||||
2686 | |||||||
2687 | unsigned OldIndex = NumBases + PrevField->getFieldIndex(); | ||||||
2688 | if (StructuredList && OldIndex <= StructuredList->getNumInits()) { | ||||||
2689 | if (Expr *PrevInit = StructuredList->getInit(OldIndex)) { | ||||||
2690 | SemaRef.Diag(PrevInit->getBeginLoc(), | ||||||
2691 | diag::note_previous_field_init) | ||||||
2692 | << PrevField << PrevInit->getSourceRange(); | ||||||
2693 | } | ||||||
2694 | } | ||||||
2695 | } | ||||||
2696 | } | ||||||
2697 | |||||||
2698 | |||||||
2699 | // Update the designator with the field declaration. | ||||||
2700 | if (!VerifyOnly) | ||||||
2701 | D->setField(*Field); | ||||||
2702 | |||||||
2703 | // Make sure that our non-designated initializer list has space | ||||||
2704 | // for a subobject corresponding to this field. | ||||||
2705 | if (StructuredList && FieldIndex >= StructuredList->getNumInits()) | ||||||
2706 | StructuredList->resizeInits(SemaRef.Context, FieldIndex + 1); | ||||||
2707 | |||||||
2708 | // This designator names a flexible array member. | ||||||
2709 | if (Field->getType()->isIncompleteArrayType()) { | ||||||
2710 | bool Invalid = false; | ||||||
2711 | if ((DesigIdx + 1) != DIE->size()) { | ||||||
2712 | // We can't designate an object within the flexible array | ||||||
2713 | // member (because GCC doesn't allow it). | ||||||
2714 | if (!VerifyOnly) { | ||||||
2715 | DesignatedInitExpr::Designator *NextD | ||||||
2716 | = DIE->getDesignator(DesigIdx + 1); | ||||||
2717 | SemaRef.Diag(NextD->getBeginLoc(), | ||||||
2718 | diag::err_designator_into_flexible_array_member) | ||||||
2719 | << SourceRange(NextD->getBeginLoc(), DIE->getEndLoc()); | ||||||
2720 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||||
2721 | << *Field; | ||||||
2722 | } | ||||||
2723 | Invalid = true; | ||||||
2724 | } | ||||||
2725 | |||||||
2726 | if (!hadError && !isa<InitListExpr>(DIE->getInit()) && | ||||||
2727 | !isa<StringLiteral>(DIE->getInit())) { | ||||||
2728 | // The initializer is not an initializer list. | ||||||
2729 | if (!VerifyOnly) { | ||||||
2730 | SemaRef.Diag(DIE->getInit()->getBeginLoc(), | ||||||
2731 | diag::err_flexible_array_init_needs_braces) | ||||||
2732 | << DIE->getInit()->getSourceRange(); | ||||||
2733 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||||
2734 | << *Field; | ||||||
2735 | } | ||||||
2736 | Invalid = true; | ||||||
2737 | } | ||||||
2738 | |||||||
2739 | // Check GNU flexible array initializer. | ||||||
2740 | if (!Invalid && CheckFlexibleArrayInit(Entity, DIE->getInit(), *Field, | ||||||
2741 | TopLevelObject)) | ||||||
2742 | Invalid = true; | ||||||
2743 | |||||||
2744 | if (Invalid) { | ||||||
2745 | ++Index; | ||||||
2746 | return true; | ||||||
2747 | } | ||||||
2748 | |||||||
2749 | // Initialize the array. | ||||||
2750 | bool prevHadError = hadError; | ||||||
2751 | unsigned newStructuredIndex = FieldIndex; | ||||||
2752 | unsigned OldIndex = Index; | ||||||
2753 | IList->setInit(Index, DIE->getInit()); | ||||||
2754 | |||||||
2755 | InitializedEntity MemberEntity = | ||||||
2756 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||||
2757 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||||
2758 | StructuredList, newStructuredIndex); | ||||||
2759 | |||||||
2760 | IList->setInit(OldIndex, DIE); | ||||||
2761 | if (hadError && !prevHadError) { | ||||||
2762 | ++Field; | ||||||
2763 | ++FieldIndex; | ||||||
2764 | if (NextField) | ||||||
2765 | *NextField = Field; | ||||||
2766 | StructuredIndex = FieldIndex; | ||||||
2767 | return true; | ||||||
2768 | } | ||||||
2769 | } else { | ||||||
2770 | // Recurse to check later designated subobjects. | ||||||
2771 | QualType FieldType = Field->getType(); | ||||||
2772 | unsigned newStructuredIndex = FieldIndex; | ||||||
2773 | |||||||
2774 | InitializedEntity MemberEntity = | ||||||
2775 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||||
2776 | if (CheckDesignatedInitializer(MemberEntity, IList, DIE, DesigIdx + 1, | ||||||
2777 | FieldType, nullptr, nullptr, Index, | ||||||
2778 | StructuredList, newStructuredIndex, | ||||||
2779 | FinishSubobjectInit, false)) | ||||||
2780 | return true; | ||||||
2781 | } | ||||||
2782 | |||||||
2783 | // Find the position of the next field to be initialized in this | ||||||
2784 | // subobject. | ||||||
2785 | ++Field; | ||||||
2786 | ++FieldIndex; | ||||||
2787 | |||||||
2788 | // If this the first designator, our caller will continue checking | ||||||
2789 | // the rest of this struct/class/union subobject. | ||||||
2790 | if (IsFirstDesignator) { | ||||||
2791 | if (NextField) | ||||||
2792 | *NextField = Field; | ||||||
2793 | StructuredIndex = FieldIndex; | ||||||
2794 | return false; | ||||||
2795 | } | ||||||
2796 | |||||||
2797 | if (!FinishSubobjectInit) | ||||||
2798 | return false; | ||||||
2799 | |||||||
2800 | // We've already initialized something in the union; we're done. | ||||||
2801 | if (RT->getDecl()->isUnion()) | ||||||
2802 | return hadError; | ||||||
2803 | |||||||
2804 | // Check the remaining fields within this class/struct/union subobject. | ||||||
2805 | bool prevHadError = hadError; | ||||||
2806 | |||||||
2807 | auto NoBases = | ||||||
2808 | CXXRecordDecl::base_class_range(CXXRecordDecl::base_class_iterator(), | ||||||
2809 | CXXRecordDecl::base_class_iterator()); | ||||||
2810 | CheckStructUnionTypes(Entity, IList, CurrentObjectType, NoBases, Field, | ||||||
2811 | false, Index, StructuredList, FieldIndex); | ||||||
2812 | return hadError && !prevHadError; | ||||||
2813 | } | ||||||
2814 | |||||||
2815 | // C99 6.7.8p6: | ||||||
2816 | // | ||||||
2817 | // If a designator has the form | ||||||
2818 | // | ||||||
2819 | // [ constant-expression ] | ||||||
2820 | // | ||||||
2821 | // then the current object (defined below) shall have array | ||||||
2822 | // type and the expression shall be an integer constant | ||||||
2823 | // expression. If the array is of unknown size, any | ||||||
2824 | // nonnegative value is valid. | ||||||
2825 | // | ||||||
2826 | // Additionally, cope with the GNU extension that permits | ||||||
2827 | // designators of the form | ||||||
2828 | // | ||||||
2829 | // [ constant-expression ... constant-expression ] | ||||||
2830 | const ArrayType *AT = SemaRef.Context.getAsArrayType(CurrentObjectType); | ||||||
2831 | if (!AT) { | ||||||
2832 | if (!VerifyOnly) | ||||||
2833 | SemaRef.Diag(D->getLBracketLoc(), diag::err_array_designator_non_array) | ||||||
2834 | << CurrentObjectType; | ||||||
2835 | ++Index; | ||||||
2836 | return true; | ||||||
2837 | } | ||||||
2838 | |||||||
2839 | Expr *IndexExpr = nullptr; | ||||||
2840 | llvm::APSInt DesignatedStartIndex, DesignatedEndIndex; | ||||||
2841 | if (D->isArrayDesignator()) { | ||||||
2842 | IndexExpr = DIE->getArrayIndex(*D); | ||||||
2843 | DesignatedStartIndex = IndexExpr->EvaluateKnownConstInt(SemaRef.Context); | ||||||
2844 | DesignatedEndIndex = DesignatedStartIndex; | ||||||
2845 | } else { | ||||||
2846 | assert(D->isArrayRangeDesignator() && "Need array-range designator")(static_cast <bool> (D->isArrayRangeDesignator() && "Need array-range designator") ? void (0) : __assert_fail ("D->isArrayRangeDesignator() && \"Need array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2846, __extension__ __PRETTY_FUNCTION__)); | ||||||
2847 | |||||||
2848 | DesignatedStartIndex = | ||||||
2849 | DIE->getArrayRangeStart(*D)->EvaluateKnownConstInt(SemaRef.Context); | ||||||
2850 | DesignatedEndIndex = | ||||||
2851 | DIE->getArrayRangeEnd(*D)->EvaluateKnownConstInt(SemaRef.Context); | ||||||
2852 | IndexExpr = DIE->getArrayRangeEnd(*D); | ||||||
2853 | |||||||
2854 | // Codegen can't handle evaluating array range designators that have side | ||||||
2855 | // effects, because we replicate the AST value for each initialized element. | ||||||
2856 | // As such, set the sawArrayRangeDesignator() bit if we initialize multiple | ||||||
2857 | // elements with something that has a side effect, so codegen can emit an | ||||||
2858 | // "error unsupported" error instead of miscompiling the app. | ||||||
2859 | if (DesignatedStartIndex.getZExtValue()!=DesignatedEndIndex.getZExtValue()&& | ||||||
2860 | DIE->getInit()->HasSideEffects(SemaRef.Context) && !VerifyOnly) | ||||||
2861 | FullyStructuredList->sawArrayRangeDesignator(); | ||||||
2862 | } | ||||||
2863 | |||||||
2864 | if (isa<ConstantArrayType>(AT)) { | ||||||
2865 | llvm::APSInt MaxElements(cast<ConstantArrayType>(AT)->getSize(), false); | ||||||
2866 | DesignatedStartIndex | ||||||
2867 | = DesignatedStartIndex.extOrTrunc(MaxElements.getBitWidth()); | ||||||
2868 | DesignatedStartIndex.setIsUnsigned(MaxElements.isUnsigned()); | ||||||
2869 | DesignatedEndIndex | ||||||
2870 | = DesignatedEndIndex.extOrTrunc(MaxElements.getBitWidth()); | ||||||
2871 | DesignatedEndIndex.setIsUnsigned(MaxElements.isUnsigned()); | ||||||
2872 | if (DesignatedEndIndex >= MaxElements) { | ||||||
2873 | if (!VerifyOnly) | ||||||
2874 | SemaRef.Diag(IndexExpr->getBeginLoc(), | ||||||
2875 | diag::err_array_designator_too_large) | ||||||
2876 | << toString(DesignatedEndIndex, 10) << toString(MaxElements, 10) | ||||||
2877 | << IndexExpr->getSourceRange(); | ||||||
2878 | ++Index; | ||||||
2879 | return true; | ||||||
2880 | } | ||||||
2881 | } else { | ||||||
2882 | unsigned DesignatedIndexBitWidth = | ||||||
2883 | ConstantArrayType::getMaxSizeBits(SemaRef.Context); | ||||||
2884 | DesignatedStartIndex = | ||||||
2885 | DesignatedStartIndex.extOrTrunc(DesignatedIndexBitWidth); | ||||||
2886 | DesignatedEndIndex = | ||||||
2887 | DesignatedEndIndex.extOrTrunc(DesignatedIndexBitWidth); | ||||||
2888 | DesignatedStartIndex.setIsUnsigned(true); | ||||||
2889 | DesignatedEndIndex.setIsUnsigned(true); | ||||||
2890 | } | ||||||
2891 | |||||||
2892 | bool IsStringLiteralInitUpdate = | ||||||
2893 | StructuredList && StructuredList->isStringLiteralInit(); | ||||||
2894 | if (IsStringLiteralInitUpdate && VerifyOnly) { | ||||||
2895 | // We're just verifying an update to a string literal init. We don't need | ||||||
2896 | // to split the string up into individual characters to do that. | ||||||
2897 | StructuredList = nullptr; | ||||||
2898 | } else if (IsStringLiteralInitUpdate) { | ||||||
2899 | // We're modifying a string literal init; we have to decompose the string | ||||||
2900 | // so we can modify the individual characters. | ||||||
2901 | ASTContext &Context = SemaRef.Context; | ||||||
2902 | Expr *SubExpr = StructuredList->getInit(0)->IgnoreParenImpCasts(); | ||||||
2903 | |||||||
2904 | // Compute the character type | ||||||
2905 | QualType CharTy = AT->getElementType(); | ||||||
2906 | |||||||
2907 | // Compute the type of the integer literals. | ||||||
2908 | QualType PromotedCharTy = CharTy; | ||||||
2909 | if (CharTy->isPromotableIntegerType()) | ||||||
2910 | PromotedCharTy = Context.getPromotedIntegerType(CharTy); | ||||||
2911 | unsigned PromotedCharTyWidth = Context.getTypeSize(PromotedCharTy); | ||||||
2912 | |||||||
2913 | if (StringLiteral *SL = dyn_cast<StringLiteral>(SubExpr)) { | ||||||
2914 | // Get the length of the string. | ||||||
2915 | uint64_t StrLen = SL->getLength(); | ||||||
2916 | if (cast<ConstantArrayType>(AT)->getSize().ult(StrLen)) | ||||||
2917 | StrLen = cast<ConstantArrayType>(AT)->getSize().getZExtValue(); | ||||||
2918 | StructuredList->resizeInits(Context, StrLen); | ||||||
2919 | |||||||
2920 | // Build a literal for each character in the string, and put them into | ||||||
2921 | // the init list. | ||||||
2922 | for (unsigned i = 0, e = StrLen; i != e; ++i) { | ||||||
2923 | llvm::APInt CodeUnit(PromotedCharTyWidth, SL->getCodeUnit(i)); | ||||||
2924 | Expr *Init = new (Context) IntegerLiteral( | ||||||
2925 | Context, CodeUnit, PromotedCharTy, SubExpr->getExprLoc()); | ||||||
2926 | if (CharTy != PromotedCharTy) | ||||||
2927 | Init = ImplicitCastExpr::Create(Context, CharTy, CK_IntegralCast, | ||||||
2928 | Init, nullptr, VK_PRValue, | ||||||
2929 | FPOptionsOverride()); | ||||||
2930 | StructuredList->updateInit(Context, i, Init); | ||||||
2931 | } | ||||||
2932 | } else { | ||||||
2933 | ObjCEncodeExpr *E = cast<ObjCEncodeExpr>(SubExpr); | ||||||
2934 | std::string Str; | ||||||
2935 | Context.getObjCEncodingForType(E->getEncodedType(), Str); | ||||||
2936 | |||||||
2937 | // Get the length of the string. | ||||||
2938 | uint64_t StrLen = Str.size(); | ||||||
2939 | if (cast<ConstantArrayType>(AT)->getSize().ult(StrLen)) | ||||||
2940 | StrLen = cast<ConstantArrayType>(AT)->getSize().getZExtValue(); | ||||||
2941 | StructuredList->resizeInits(Context, StrLen); | ||||||
2942 | |||||||
2943 | // Build a literal for each character in the string, and put them into | ||||||
2944 | // the init list. | ||||||
2945 | for (unsigned i = 0, e = StrLen; i != e; ++i) { | ||||||
2946 | llvm::APInt CodeUnit(PromotedCharTyWidth, Str[i]); | ||||||
2947 | Expr *Init = new (Context) IntegerLiteral( | ||||||
2948 | Context, CodeUnit, PromotedCharTy, SubExpr->getExprLoc()); | ||||||
2949 | if (CharTy != PromotedCharTy) | ||||||
2950 | Init = ImplicitCastExpr::Create(Context, CharTy, CK_IntegralCast, | ||||||
2951 | Init, nullptr, VK_PRValue, | ||||||
2952 | FPOptionsOverride()); | ||||||
2953 | StructuredList->updateInit(Context, i, Init); | ||||||
2954 | } | ||||||
2955 | } | ||||||
2956 | } | ||||||
2957 | |||||||
2958 | // Make sure that our non-designated initializer list has space | ||||||
2959 | // for a subobject corresponding to this array element. | ||||||
2960 | if (StructuredList && | ||||||
2961 | DesignatedEndIndex.getZExtValue() >= StructuredList->getNumInits()) | ||||||
2962 | StructuredList->resizeInits(SemaRef.Context, | ||||||
2963 | DesignatedEndIndex.getZExtValue() + 1); | ||||||
2964 | |||||||
2965 | // Repeatedly perform subobject initializations in the range | ||||||
2966 | // [DesignatedStartIndex, DesignatedEndIndex]. | ||||||
2967 | |||||||
2968 | // Move to the next designator | ||||||
2969 | unsigned ElementIndex = DesignatedStartIndex.getZExtValue(); | ||||||
2970 | unsigned OldIndex = Index; | ||||||
2971 | |||||||
2972 | InitializedEntity ElementEntity = | ||||||
2973 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||||
2974 | |||||||
2975 | while (DesignatedStartIndex <= DesignatedEndIndex) { | ||||||
2976 | // Recurse to check later designated subobjects. | ||||||
2977 | QualType ElementType = AT->getElementType(); | ||||||
2978 | Index = OldIndex; | ||||||
2979 | |||||||
2980 | ElementEntity.setElementIndex(ElementIndex); | ||||||
2981 | if (CheckDesignatedInitializer( | ||||||
2982 | ElementEntity, IList, DIE, DesigIdx + 1, ElementType, nullptr, | ||||||
2983 | nullptr, Index, StructuredList, ElementIndex, | ||||||
2984 | FinishSubobjectInit && (DesignatedStartIndex == DesignatedEndIndex), | ||||||
2985 | false)) | ||||||
2986 | return true; | ||||||
2987 | |||||||
2988 | // Move to the next index in the array that we'll be initializing. | ||||||
2989 | ++DesignatedStartIndex; | ||||||
2990 | ElementIndex = DesignatedStartIndex.getZExtValue(); | ||||||
2991 | } | ||||||
2992 | |||||||
2993 | // If this the first designator, our caller will continue checking | ||||||
2994 | // the rest of this array subobject. | ||||||
2995 | if (IsFirstDesignator) { | ||||||
2996 | if (NextElementIndex) | ||||||
2997 | *NextElementIndex = DesignatedStartIndex; | ||||||
2998 | StructuredIndex = ElementIndex; | ||||||
2999 | return false; | ||||||
3000 | } | ||||||
3001 | |||||||
3002 | if (!FinishSubobjectInit) | ||||||
3003 | return false; | ||||||
3004 | |||||||
3005 | // Check the remaining elements within this array subobject. | ||||||
3006 | bool prevHadError = hadError; | ||||||
3007 | CheckArrayType(Entity, IList, CurrentObjectType, DesignatedStartIndex, | ||||||
3008 | /*SubobjectIsDesignatorContext=*/false, Index, | ||||||
3009 | StructuredList, ElementIndex); | ||||||
3010 | return hadError && !prevHadError; | ||||||
3011 | } | ||||||
3012 | |||||||
3013 | // Get the structured initializer list for a subobject of type | ||||||
3014 | // @p CurrentObjectType. | ||||||
3015 | InitListExpr * | ||||||
3016 | InitListChecker::getStructuredSubobjectInit(InitListExpr *IList, unsigned Index, | ||||||
3017 | QualType CurrentObjectType, | ||||||
3018 | InitListExpr *StructuredList, | ||||||
3019 | unsigned StructuredIndex, | ||||||
3020 | SourceRange InitRange, | ||||||
3021 | bool IsFullyOverwritten) { | ||||||
3022 | if (!StructuredList) | ||||||
3023 | return nullptr; | ||||||
3024 | |||||||
3025 | Expr *ExistingInit = nullptr; | ||||||
3026 | if (StructuredIndex < StructuredList->getNumInits()) | ||||||
3027 | ExistingInit = StructuredList->getInit(StructuredIndex); | ||||||
3028 | |||||||
3029 | if (InitListExpr *Result = dyn_cast_or_null<InitListExpr>(ExistingInit)) | ||||||
3030 | // There might have already been initializers for subobjects of the current | ||||||
3031 | // object, but a subsequent initializer list will overwrite the entirety | ||||||
3032 | // of the current object. (See DR 253 and C99 6.7.8p21). e.g., | ||||||
3033 | // | ||||||
3034 | // struct P { char x[6]; }; | ||||||
3035 | // struct P l = { .x[2] = 'x', .x = { [0] = 'f' } }; | ||||||
3036 | // | ||||||
3037 | // The first designated initializer is ignored, and l.x is just "f". | ||||||
3038 | if (!IsFullyOverwritten) | ||||||
3039 | return Result; | ||||||
3040 | |||||||
3041 | if (ExistingInit) { | ||||||
3042 | // We are creating an initializer list that initializes the | ||||||
3043 | // subobjects of the current object, but there was already an | ||||||
3044 | // initialization that completely initialized the current | ||||||
3045 | // subobject: | ||||||
3046 | // | ||||||
3047 | // struct X { int a, b; }; | ||||||
3048 | // struct X xs[] = { [0] = { 1, 2 }, [0].b = 3 }; | ||||||
3049 | // | ||||||
3050 | // Here, xs[0].a == 1 and xs[0].b == 3, since the second, | ||||||
3051 | // designated initializer overwrites the [0].b initializer | ||||||
3052 | // from the prior initialization. | ||||||
3053 | // | ||||||
3054 | // When the existing initializer is an expression rather than an | ||||||
3055 | // initializer list, we cannot decompose and update it in this way. | ||||||
3056 | // For example: | ||||||
3057 | // | ||||||
3058 | // struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 }; | ||||||
3059 | // | ||||||
3060 | // This case is handled by CheckDesignatedInitializer. | ||||||
3061 | diagnoseInitOverride(ExistingInit, InitRange); | ||||||
3062 | } | ||||||
3063 | |||||||
3064 | unsigned ExpectedNumInits = 0; | ||||||
3065 | if (Index < IList->getNumInits()) { | ||||||
3066 | if (auto *Init = dyn_cast_or_null<InitListExpr>(IList->getInit(Index))) | ||||||
3067 | ExpectedNumInits = Init->getNumInits(); | ||||||
3068 | else | ||||||
3069 | ExpectedNumInits = IList->getNumInits() - Index; | ||||||
3070 | } | ||||||
3071 | |||||||
3072 | InitListExpr *Result = | ||||||
3073 | createInitListExpr(CurrentObjectType, InitRange, ExpectedNumInits); | ||||||
3074 | |||||||
3075 | // Link this new initializer list into the structured initializer | ||||||
3076 | // lists. | ||||||
3077 | StructuredList->updateInit(SemaRef.Context, StructuredIndex, Result); | ||||||
3078 | return Result; | ||||||
3079 | } | ||||||
3080 | |||||||
3081 | InitListExpr * | ||||||
3082 | InitListChecker::createInitListExpr(QualType CurrentObjectType, | ||||||
3083 | SourceRange InitRange, | ||||||
3084 | unsigned ExpectedNumInits) { | ||||||
3085 | InitListExpr *Result | ||||||
3086 | = new (SemaRef.Context) InitListExpr(SemaRef.Context, | ||||||
3087 | InitRange.getBegin(), None, | ||||||
3088 | InitRange.getEnd()); | ||||||
3089 | |||||||
3090 | QualType ResultType = CurrentObjectType; | ||||||
3091 | if (!ResultType->isArrayType()) | ||||||
3092 | ResultType = ResultType.getNonLValueExprType(SemaRef.Context); | ||||||
3093 | Result->setType(ResultType); | ||||||
3094 | |||||||
3095 | // Pre-allocate storage for the structured initializer list. | ||||||
3096 | unsigned NumElements = 0; | ||||||
3097 | |||||||
3098 | if (const ArrayType *AType | ||||||
3099 | = SemaRef.Context.getAsArrayType(CurrentObjectType)) { | ||||||
3100 | if (const ConstantArrayType *CAType = dyn_cast<ConstantArrayType>(AType)) { | ||||||
3101 | NumElements = CAType->getSize().getZExtValue(); | ||||||
3102 | // Simple heuristic so that we don't allocate a very large | ||||||
3103 | // initializer with many empty entries at the end. | ||||||
3104 | if (NumElements > ExpectedNumInits) | ||||||
3105 | NumElements = 0; | ||||||
3106 | } | ||||||
3107 | } else if (const VectorType *VType = CurrentObjectType->getAs<VectorType>()) { | ||||||
3108 | NumElements = VType->getNumElements(); | ||||||
3109 | } else if (CurrentObjectType->isRecordType()) { | ||||||
3110 | NumElements = numStructUnionElements(CurrentObjectType); | ||||||
3111 | } | ||||||
3112 | |||||||
3113 | Result->reserveInits(SemaRef.Context, NumElements); | ||||||
3114 | |||||||
3115 | return Result; | ||||||
3116 | } | ||||||
3117 | |||||||
3118 | /// Update the initializer at index @p StructuredIndex within the | ||||||
3119 | /// structured initializer list to the value @p expr. | ||||||
3120 | void InitListChecker::UpdateStructuredListElement(InitListExpr *StructuredList, | ||||||
3121 | unsigned &StructuredIndex, | ||||||
3122 | Expr *expr) { | ||||||
3123 | // No structured initializer list to update | ||||||
3124 | if (!StructuredList) | ||||||
3125 | return; | ||||||
3126 | |||||||
3127 | if (Expr *PrevInit = StructuredList->updateInit(SemaRef.Context, | ||||||
3128 | StructuredIndex, expr)) { | ||||||
3129 | // This initializer overwrites a previous initializer. | ||||||
3130 | // No need to diagnose when `expr` is nullptr because a more relevant | ||||||
3131 | // diagnostic has already been issued and this diagnostic is potentially | ||||||
3132 | // noise. | ||||||
3133 | if (expr) | ||||||
3134 | diagnoseInitOverride(PrevInit, expr->getSourceRange()); | ||||||
3135 | } | ||||||
3136 | |||||||
3137 | ++StructuredIndex; | ||||||
3138 | } | ||||||
3139 | |||||||
3140 | /// Determine whether we can perform aggregate initialization for the purposes | ||||||
3141 | /// of overload resolution. | ||||||
3142 | bool Sema::CanPerformAggregateInitializationForOverloadResolution( | ||||||
3143 | const InitializedEntity &Entity, InitListExpr *From) { | ||||||
3144 | QualType Type = Entity.getType(); | ||||||
3145 | InitListChecker Check(*this, Entity, From, Type, /*VerifyOnly=*/true, | ||||||
3146 | /*TreatUnavailableAsInvalid=*/false, | ||||||
3147 | /*InOverloadResolution=*/true); | ||||||
3148 | return !Check.HadError(); | ||||||
3149 | } | ||||||
3150 | |||||||
3151 | /// Check that the given Index expression is a valid array designator | ||||||
3152 | /// value. This is essentially just a wrapper around | ||||||
3153 | /// VerifyIntegerConstantExpression that also checks for negative values | ||||||
3154 | /// and produces a reasonable diagnostic if there is a | ||||||
3155 | /// failure. Returns the index expression, possibly with an implicit cast | ||||||
3156 | /// added, on success. If everything went okay, Value will receive the | ||||||
3157 | /// value of the constant expression. | ||||||
3158 | static ExprResult | ||||||
3159 | CheckArrayDesignatorExpr(Sema &S, Expr *Index, llvm::APSInt &Value) { | ||||||
3160 | SourceLocation Loc = Index->getBeginLoc(); | ||||||
3161 | |||||||
3162 | // Make sure this is an integer constant expression. | ||||||
3163 | ExprResult Result = | ||||||
3164 | S.VerifyIntegerConstantExpression(Index, &Value, Sema::AllowFold); | ||||||
3165 | if (Result.isInvalid()) | ||||||
3166 | return Result; | ||||||
3167 | |||||||
3168 | if (Value.isSigned() && Value.isNegative()) | ||||||
3169 | return S.Diag(Loc, diag::err_array_designator_negative) | ||||||
3170 | << toString(Value, 10) << Index->getSourceRange(); | ||||||
3171 | |||||||
3172 | Value.setIsUnsigned(true); | ||||||
3173 | return Result; | ||||||
3174 | } | ||||||
3175 | |||||||
3176 | ExprResult Sema::ActOnDesignatedInitializer(Designation &Desig, | ||||||
3177 | SourceLocation EqualOrColonLoc, | ||||||
3178 | bool GNUSyntax, | ||||||
3179 | ExprResult Init) { | ||||||
3180 | typedef DesignatedInitExpr::Designator ASTDesignator; | ||||||
3181 | |||||||
3182 | bool Invalid = false; | ||||||
3183 | SmallVector<ASTDesignator, 32> Designators; | ||||||
3184 | SmallVector<Expr *, 32> InitExpressions; | ||||||
3185 | |||||||
3186 | // Build designators and check array designator expressions. | ||||||
3187 | for (unsigned Idx = 0; Idx < Desig.getNumDesignators(); ++Idx) { | ||||||
3188 | const Designator &D = Desig.getDesignator(Idx); | ||||||
3189 | switch (D.getKind()) { | ||||||
3190 | case Designator::FieldDesignator: | ||||||
3191 | Designators.push_back(ASTDesignator(D.getField(), D.getDotLoc(), | ||||||
3192 | D.getFieldLoc())); | ||||||
3193 | break; | ||||||
3194 | |||||||
3195 | case Designator::ArrayDesignator: { | ||||||
3196 | Expr *Index = static_cast<Expr *>(D.getArrayIndex()); | ||||||
3197 | llvm::APSInt IndexValue; | ||||||
3198 | if (!Index->isTypeDependent() && !Index->isValueDependent()) | ||||||
3199 | Index = CheckArrayDesignatorExpr(*this, Index, IndexValue).get(); | ||||||
3200 | if (!Index) | ||||||
3201 | Invalid = true; | ||||||
3202 | else { | ||||||
3203 | Designators.push_back(ASTDesignator(InitExpressions.size(), | ||||||
3204 | D.getLBracketLoc(), | ||||||
3205 | D.getRBracketLoc())); | ||||||
3206 | InitExpressions.push_back(Index); | ||||||
3207 | } | ||||||
3208 | break; | ||||||
3209 | } | ||||||
3210 | |||||||
3211 | case Designator::ArrayRangeDesignator: { | ||||||
3212 | Expr *StartIndex = static_cast<Expr *>(D.getArrayRangeStart()); | ||||||
3213 | Expr *EndIndex = static_cast<Expr *>(D.getArrayRangeEnd()); | ||||||
3214 | llvm::APSInt StartValue; | ||||||
3215 | llvm::APSInt EndValue; | ||||||
3216 | bool StartDependent = StartIndex->isTypeDependent() || | ||||||
3217 | StartIndex->isValueDependent(); | ||||||
3218 | bool EndDependent = EndIndex->isTypeDependent() || | ||||||
3219 | EndIndex->isValueDependent(); | ||||||
3220 | if (!StartDependent) | ||||||
3221 | StartIndex = | ||||||
3222 | CheckArrayDesignatorExpr(*this, StartIndex, StartValue).get(); | ||||||
3223 | if (!EndDependent) | ||||||
3224 | EndIndex = CheckArrayDesignatorExpr(*this, EndIndex, EndValue).get(); | ||||||
3225 | |||||||
3226 | if (!StartIndex || !EndIndex) | ||||||
3227 | Invalid = true; | ||||||
3228 | else { | ||||||
3229 | // Make sure we're comparing values with the same bit width. | ||||||
3230 | if (StartDependent || EndDependent) { | ||||||
3231 | // Nothing to compute. | ||||||
3232 | } else if (StartValue.getBitWidth() > EndValue.getBitWidth()) | ||||||
3233 | EndValue = EndValue.extend(StartValue.getBitWidth()); | ||||||
3234 | else if (StartValue.getBitWidth() < EndValue.getBitWidth()) | ||||||
3235 | StartValue = StartValue.extend(EndValue.getBitWidth()); | ||||||
3236 | |||||||
3237 | if (!StartDependent && !EndDependent && EndValue < StartValue) { | ||||||
3238 | Diag(D.getEllipsisLoc(), diag::err_array_designator_empty_range) | ||||||
3239 | << toString(StartValue, 10) << toString(EndValue, 10) | ||||||
3240 | << StartIndex->getSourceRange() << EndIndex->getSourceRange(); | ||||||
3241 | Invalid = true; | ||||||
3242 | } else { | ||||||
3243 | Designators.push_back(ASTDesignator(InitExpressions.size(), | ||||||
3244 | D.getLBracketLoc(), | ||||||
3245 | D.getEllipsisLoc(), | ||||||
3246 | D.getRBracketLoc())); | ||||||
3247 | InitExpressions.push_back(StartIndex); | ||||||
3248 | InitExpressions.push_back(EndIndex); | ||||||
3249 | } | ||||||
3250 | } | ||||||
3251 | break; | ||||||
3252 | } | ||||||
3253 | } | ||||||
3254 | } | ||||||
3255 | |||||||
3256 | if (Invalid || Init.isInvalid()) | ||||||
3257 | return ExprError(); | ||||||
3258 | |||||||
3259 | // Clear out the expressions within the designation. | ||||||
3260 | Desig.ClearExprs(*this); | ||||||
3261 | |||||||
3262 | return DesignatedInitExpr::Create(Context, Designators, InitExpressions, | ||||||
3263 | EqualOrColonLoc, GNUSyntax, | ||||||
3264 | Init.getAs<Expr>()); | ||||||
3265 | } | ||||||
3266 | |||||||
3267 | //===----------------------------------------------------------------------===// | ||||||
3268 | // Initialization entity | ||||||
3269 | //===----------------------------------------------------------------------===// | ||||||
3270 | |||||||
3271 | InitializedEntity::InitializedEntity(ASTContext &Context, unsigned Index, | ||||||
3272 | const InitializedEntity &Parent) | ||||||
3273 | : Parent(&Parent), Index(Index) | ||||||
3274 | { | ||||||
3275 | if (const ArrayType *AT = Context.getAsArrayType(Parent.getType())) { | ||||||
3276 | Kind = EK_ArrayElement; | ||||||
3277 | Type = AT->getElementType(); | ||||||
3278 | } else if (const VectorType *VT = Parent.getType()->getAs<VectorType>()) { | ||||||
3279 | Kind = EK_VectorElement; | ||||||
3280 | Type = VT->getElementType(); | ||||||
3281 | } else { | ||||||
3282 | const ComplexType *CT = Parent.getType()->getAs<ComplexType>(); | ||||||
3283 | assert(CT && "Unexpected type")(static_cast <bool> (CT && "Unexpected type") ? void (0) : __assert_fail ("CT && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3283, __extension__ __PRETTY_FUNCTION__)); | ||||||
3284 | Kind = EK_ComplexElement; | ||||||
3285 | Type = CT->getElementType(); | ||||||
3286 | } | ||||||
3287 | } | ||||||
3288 | |||||||
3289 | InitializedEntity | ||||||
3290 | InitializedEntity::InitializeBase(ASTContext &Context, | ||||||
3291 | const CXXBaseSpecifier *Base, | ||||||
3292 | bool IsInheritedVirtualBase, | ||||||
3293 | const InitializedEntity *Parent) { | ||||||
3294 | InitializedEntity Result; | ||||||
3295 | Result.Kind = EK_Base; | ||||||
3296 | Result.Parent = Parent; | ||||||
3297 | Result.Base = {Base, IsInheritedVirtualBase}; | ||||||
3298 | Result.Type = Base->getType(); | ||||||
3299 | return Result; | ||||||
3300 | } | ||||||
3301 | |||||||
3302 | DeclarationName InitializedEntity::getName() const { | ||||||
3303 | switch (getKind()) { | ||||||
3304 | case EK_Parameter: | ||||||
3305 | case EK_Parameter_CF_Audited: { | ||||||
3306 | ParmVarDecl *D = Parameter.getPointer(); | ||||||
3307 | return (D ? D->getDeclName() : DeclarationName()); | ||||||
3308 | } | ||||||
3309 | |||||||
3310 | case EK_Variable: | ||||||
3311 | case EK_Member: | ||||||
3312 | case EK_Binding: | ||||||
3313 | case EK_TemplateParameter: | ||||||
3314 | return Variable.VariableOrMember->getDeclName(); | ||||||
3315 | |||||||
3316 | case EK_LambdaCapture: | ||||||
3317 | return DeclarationName(Capture.VarID); | ||||||
3318 | |||||||
3319 | case EK_Result: | ||||||
3320 | case EK_StmtExprResult: | ||||||
3321 | case EK_Exception: | ||||||
3322 | case EK_New: | ||||||
3323 | case EK_Temporary: | ||||||
3324 | case EK_Base: | ||||||
3325 | case EK_Delegating: | ||||||
3326 | case EK_ArrayElement: | ||||||
3327 | case EK_VectorElement: | ||||||
3328 | case EK_ComplexElement: | ||||||
3329 | case EK_BlockElement: | ||||||
3330 | case EK_LambdaToBlockConversionBlockElement: | ||||||
3331 | case EK_CompoundLiteralInit: | ||||||
3332 | case EK_RelatedResult: | ||||||
3333 | return DeclarationName(); | ||||||
3334 | } | ||||||
3335 | |||||||
3336 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3336); | ||||||
3337 | } | ||||||
3338 | |||||||
3339 | ValueDecl *InitializedEntity::getDecl() const { | ||||||
3340 | switch (getKind()) { | ||||||
3341 | case EK_Variable: | ||||||
3342 | case EK_Member: | ||||||
3343 | case EK_Binding: | ||||||
3344 | case EK_TemplateParameter: | ||||||
3345 | return Variable.VariableOrMember; | ||||||
3346 | |||||||
3347 | case EK_Parameter: | ||||||
3348 | case EK_Parameter_CF_Audited: | ||||||
3349 | return Parameter.getPointer(); | ||||||
3350 | |||||||
3351 | case EK_Result: | ||||||
3352 | case EK_StmtExprResult: | ||||||
3353 | case EK_Exception: | ||||||
3354 | case EK_New: | ||||||
3355 | case EK_Temporary: | ||||||
3356 | case EK_Base: | ||||||
3357 | case EK_Delegating: | ||||||
3358 | case EK_ArrayElement: | ||||||
3359 | case EK_VectorElement: | ||||||
3360 | case EK_ComplexElement: | ||||||
3361 | case EK_BlockElement: | ||||||
3362 | case EK_LambdaToBlockConversionBlockElement: | ||||||
3363 | case EK_LambdaCapture: | ||||||
3364 | case EK_CompoundLiteralInit: | ||||||
3365 | case EK_RelatedResult: | ||||||
3366 | return nullptr; | ||||||
3367 | } | ||||||
3368 | |||||||
3369 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3369); | ||||||
3370 | } | ||||||
3371 | |||||||
3372 | bool InitializedEntity::allowsNRVO() const { | ||||||
3373 | switch (getKind()) { | ||||||
3374 | case EK_Result: | ||||||
3375 | case EK_Exception: | ||||||
3376 | return LocAndNRVO.NRVO; | ||||||
3377 | |||||||
3378 | case EK_StmtExprResult: | ||||||
3379 | case EK_Variable: | ||||||
3380 | case EK_Parameter: | ||||||
3381 | case EK_Parameter_CF_Audited: | ||||||
3382 | case EK_TemplateParameter: | ||||||
3383 | case EK_Member: | ||||||
3384 | case EK_Binding: | ||||||
3385 | case EK_New: | ||||||
3386 | case EK_Temporary: | ||||||
3387 | case EK_CompoundLiteralInit: | ||||||
3388 | case EK_Base: | ||||||
3389 | case EK_Delegating: | ||||||
3390 | case EK_ArrayElement: | ||||||
3391 | case EK_VectorElement: | ||||||
3392 | case EK_ComplexElement: | ||||||
3393 | case EK_BlockElement: | ||||||
3394 | case EK_LambdaToBlockConversionBlockElement: | ||||||
3395 | case EK_LambdaCapture: | ||||||
3396 | case EK_RelatedResult: | ||||||
3397 | break; | ||||||
3398 | } | ||||||
3399 | |||||||
3400 | return false; | ||||||
3401 | } | ||||||
3402 | |||||||
3403 | unsigned InitializedEntity::dumpImpl(raw_ostream &OS) const { | ||||||
3404 | assert(getParent() != this)(static_cast <bool> (getParent() != this) ? void (0) : __assert_fail ("getParent() != this", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3404, __extension__ __PRETTY_FUNCTION__)); | ||||||
3405 | unsigned Depth = getParent() ? getParent()->dumpImpl(OS) : 0; | ||||||
3406 | for (unsigned I = 0; I != Depth; ++I) | ||||||
3407 | OS << "`-"; | ||||||
3408 | |||||||
3409 | switch (getKind()) { | ||||||
3410 | case EK_Variable: OS << "Variable"; break; | ||||||
3411 | case EK_Parameter: OS << "Parameter"; break; | ||||||
3412 | case EK_Parameter_CF_Audited: OS << "CF audited function Parameter"; | ||||||
3413 | break; | ||||||
3414 | case EK_TemplateParameter: OS << "TemplateParameter"; break; | ||||||
3415 | case EK_Result: OS << "Result"; break; | ||||||
3416 | case EK_StmtExprResult: OS << "StmtExprResult"; break; | ||||||
3417 | case EK_Exception: OS << "Exception"; break; | ||||||
3418 | case EK_Member: OS << "Member"; break; | ||||||
3419 | case EK_Binding: OS << "Binding"; break; | ||||||
3420 | case EK_New: OS << "New"; break; | ||||||
3421 | case EK_Temporary: OS << "Temporary"; break; | ||||||
3422 | case EK_CompoundLiteralInit: OS << "CompoundLiteral";break; | ||||||
3423 | case EK_RelatedResult: OS << "RelatedResult"; break; | ||||||
3424 | case EK_Base: OS << "Base"; break; | ||||||
3425 | case EK_Delegating: OS << "Delegating"; break; | ||||||
3426 | case EK_ArrayElement: OS << "ArrayElement " << Index; break; | ||||||
3427 | case EK_VectorElement: OS << "VectorElement " << Index; break; | ||||||
3428 | case EK_ComplexElement: OS << "ComplexElement " << Index; break; | ||||||
3429 | case EK_BlockElement: OS << "Block"; break; | ||||||
3430 | case EK_LambdaToBlockConversionBlockElement: | ||||||
3431 | OS << "Block (lambda)"; | ||||||
3432 | break; | ||||||
3433 | case EK_LambdaCapture: | ||||||
3434 | OS << "LambdaCapture "; | ||||||
3435 | OS << DeclarationName(Capture.VarID); | ||||||
3436 | break; | ||||||
3437 | } | ||||||
3438 | |||||||
3439 | if (auto *D = getDecl()) { | ||||||
3440 | OS << " "; | ||||||
3441 | D->printQualifiedName(OS); | ||||||
3442 | } | ||||||
3443 | |||||||
3444 | OS << " '" << getType().getAsString() << "'\n"; | ||||||
3445 | |||||||
3446 | return Depth + 1; | ||||||
3447 | } | ||||||
3448 | |||||||
3449 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void InitializedEntity::dump() const { | ||||||
3450 | dumpImpl(llvm::errs()); | ||||||
3451 | } | ||||||
3452 | |||||||
3453 | //===----------------------------------------------------------------------===// | ||||||
3454 | // Initialization sequence | ||||||
3455 | //===----------------------------------------------------------------------===// | ||||||
3456 | |||||||
3457 | void InitializationSequence::Step::Destroy() { | ||||||
3458 | switch (Kind) { | ||||||
3459 | case SK_ResolveAddressOfOverloadedFunction: | ||||||
3460 | case SK_CastDerivedToBasePRValue: | ||||||
3461 | case SK_CastDerivedToBaseXValue: | ||||||
3462 | case SK_CastDerivedToBaseLValue: | ||||||
3463 | case SK_BindReference: | ||||||
3464 | case SK_BindReferenceToTemporary: | ||||||
3465 | case SK_FinalCopy: | ||||||
3466 | case SK_ExtraneousCopyToTemporary: | ||||||
3467 | case SK_UserConversion: | ||||||
3468 | case SK_QualificationConversionPRValue: | ||||||
3469 | case SK_QualificationConversionXValue: | ||||||
3470 | case SK_QualificationConversionLValue: | ||||||
3471 | case SK_FunctionReferenceConversion: | ||||||
3472 | case SK_AtomicConversion: | ||||||
3473 | case SK_ListInitialization: | ||||||
3474 | case SK_UnwrapInitList: | ||||||
3475 | case SK_RewrapInitList: | ||||||
3476 | case SK_ConstructorInitialization: | ||||||
3477 | case SK_ConstructorInitializationFromList: | ||||||
3478 | case SK_ZeroInitialization: | ||||||
3479 | case SK_CAssignment: | ||||||
3480 | case SK_StringInit: | ||||||
3481 | case SK_ObjCObjectConversion: | ||||||
3482 | case SK_ArrayLoopIndex: | ||||||
3483 | case SK_ArrayLoopInit: | ||||||
3484 | case SK_ArrayInit: | ||||||
3485 | case SK_GNUArrayInit: | ||||||
3486 | case SK_ParenthesizedArrayInit: | ||||||
3487 | case SK_PassByIndirectCopyRestore: | ||||||
3488 | case SK_PassByIndirectRestore: | ||||||
3489 | case SK_ProduceObjCObject: | ||||||
3490 | case SK_StdInitializerList: | ||||||
3491 | case SK_StdInitializerListConstructorCall: | ||||||
3492 | case SK_OCLSamplerInit: | ||||||
3493 | case SK_OCLZeroOpaqueType: | ||||||
3494 | break; | ||||||
3495 | |||||||
3496 | case SK_ConversionSequence: | ||||||
3497 | case SK_ConversionSequenceNoNarrowing: | ||||||
3498 | delete ICS; | ||||||
3499 | } | ||||||
3500 | } | ||||||
3501 | |||||||
3502 | bool InitializationSequence::isDirectReferenceBinding() const { | ||||||
3503 | // There can be some lvalue adjustments after the SK_BindReference step. | ||||||
3504 | for (auto I = Steps.rbegin(); I != Steps.rend(); ++I) { | ||||||
3505 | if (I->Kind == SK_BindReference) | ||||||
3506 | return true; | ||||||
3507 | if (I->Kind == SK_BindReferenceToTemporary) | ||||||
3508 | return false; | ||||||
3509 | } | ||||||
3510 | return false; | ||||||
3511 | } | ||||||
3512 | |||||||
3513 | bool InitializationSequence::isAmbiguous() const { | ||||||
3514 | if (!Failed()) | ||||||
3515 | return false; | ||||||
3516 | |||||||
3517 | switch (getFailureKind()) { | ||||||
3518 | case FK_TooManyInitsForReference: | ||||||
3519 | case FK_ParenthesizedListInitForReference: | ||||||
3520 | case FK_ArrayNeedsInitList: | ||||||
3521 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||||
3522 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||||
3523 | case FK_NarrowStringIntoWideCharArray: | ||||||
3524 | case FK_WideStringIntoCharArray: | ||||||
3525 | case FK_IncompatWideStringIntoWideChar: | ||||||
3526 | case FK_PlainStringIntoUTF8Char: | ||||||
3527 | case FK_UTF8StringIntoPlainChar: | ||||||
3528 | case FK_AddressOfOverloadFailed: // FIXME: Could do better | ||||||
3529 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||||
3530 | case FK_NonConstLValueReferenceBindingToBitfield: | ||||||
3531 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||||
3532 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||||
3533 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||||
3534 | case FK_RValueReferenceBindingToLValue: | ||||||
3535 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||||
3536 | case FK_ReferenceInitDropsQualifiers: | ||||||
3537 | case FK_ReferenceInitFailed: | ||||||
3538 | case FK_ConversionFailed: | ||||||
3539 | case FK_ConversionFromPropertyFailed: | ||||||
3540 | case FK_TooManyInitsForScalar: | ||||||
3541 | case FK_ParenthesizedListInitForScalar: | ||||||
3542 | case FK_ReferenceBindingToInitList: | ||||||
3543 | case FK_InitListBadDestinationType: | ||||||
3544 | case FK_DefaultInitOfConst: | ||||||
3545 | case FK_Incomplete: | ||||||
3546 | case FK_ArrayTypeMismatch: | ||||||
3547 | case FK_NonConstantArrayInit: | ||||||
3548 | case FK_ListInitializationFailed: | ||||||
3549 | case FK_VariableLengthArrayHasInitializer: | ||||||
3550 | case FK_PlaceholderType: | ||||||
3551 | case FK_ExplicitConstructor: | ||||||
3552 | case FK_AddressOfUnaddressableFunction: | ||||||
3553 | return false; | ||||||
3554 | |||||||
3555 | case FK_ReferenceInitOverloadFailed: | ||||||
3556 | case FK_UserConversionOverloadFailed: | ||||||
3557 | case FK_ConstructorOverloadFailed: | ||||||
3558 | case FK_ListConstructorOverloadFailed: | ||||||
3559 | return FailedOverloadResult == OR_Ambiguous; | ||||||
3560 | } | ||||||
3561 | |||||||
3562 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3562); | ||||||
3563 | } | ||||||
3564 | |||||||
3565 | bool InitializationSequence::isConstructorInitialization() const { | ||||||
3566 | return !Steps.empty() && Steps.back().Kind == SK_ConstructorInitialization; | ||||||
3567 | } | ||||||
3568 | |||||||
3569 | void | ||||||
3570 | InitializationSequence | ||||||
3571 | ::AddAddressOverloadResolutionStep(FunctionDecl *Function, | ||||||
3572 | DeclAccessPair Found, | ||||||
3573 | bool HadMultipleCandidates) { | ||||||
3574 | Step S; | ||||||
3575 | S.Kind = SK_ResolveAddressOfOverloadedFunction; | ||||||
3576 | S.Type = Function->getType(); | ||||||
3577 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||||
3578 | S.Function.Function = Function; | ||||||
3579 | S.Function.FoundDecl = Found; | ||||||
3580 | Steps.push_back(S); | ||||||
3581 | } | ||||||
3582 | |||||||
3583 | void InitializationSequence::AddDerivedToBaseCastStep(QualType BaseType, | ||||||
3584 | ExprValueKind VK) { | ||||||
3585 | Step S; | ||||||
3586 | switch (VK) { | ||||||
3587 | case VK_PRValue: | ||||||
3588 | S.Kind = SK_CastDerivedToBasePRValue; | ||||||
3589 | break; | ||||||
3590 | case VK_XValue: S.Kind = SK_CastDerivedToBaseXValue; break; | ||||||
3591 | case VK_LValue: S.Kind = SK_CastDerivedToBaseLValue; break; | ||||||
3592 | } | ||||||
3593 | S.Type = BaseType; | ||||||
3594 | Steps.push_back(S); | ||||||
3595 | } | ||||||
3596 | |||||||
3597 | void InitializationSequence::AddReferenceBindingStep(QualType T, | ||||||
3598 | bool BindingTemporary) { | ||||||
3599 | Step S; | ||||||
3600 | S.Kind = BindingTemporary? SK_BindReferenceToTemporary : SK_BindReference; | ||||||
3601 | S.Type = T; | ||||||
3602 | Steps.push_back(S); | ||||||
3603 | } | ||||||
3604 | |||||||
3605 | void InitializationSequence::AddFinalCopy(QualType T) { | ||||||
3606 | Step S; | ||||||
3607 | S.Kind = SK_FinalCopy; | ||||||
3608 | S.Type = T; | ||||||
3609 | Steps.push_back(S); | ||||||
3610 | } | ||||||
3611 | |||||||
3612 | void InitializationSequence::AddExtraneousCopyToTemporary(QualType T) { | ||||||
3613 | Step S; | ||||||
3614 | S.Kind = SK_ExtraneousCopyToTemporary; | ||||||
3615 | S.Type = T; | ||||||
3616 | Steps.push_back(S); | ||||||
3617 | } | ||||||
3618 | |||||||
3619 | void | ||||||
3620 | InitializationSequence::AddUserConversionStep(FunctionDecl *Function, | ||||||
3621 | DeclAccessPair FoundDecl, | ||||||
3622 | QualType T, | ||||||
3623 | bool HadMultipleCandidates) { | ||||||
3624 | Step S; | ||||||
3625 | S.Kind = SK_UserConversion; | ||||||
3626 | S.Type = T; | ||||||
3627 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||||
3628 | S.Function.Function = Function; | ||||||
3629 | S.Function.FoundDecl = FoundDecl; | ||||||
3630 | Steps.push_back(S); | ||||||
3631 | } | ||||||
3632 | |||||||
3633 | void InitializationSequence::AddQualificationConversionStep(QualType Ty, | ||||||
3634 | ExprValueKind VK) { | ||||||
3635 | Step S; | ||||||
3636 | S.Kind = SK_QualificationConversionPRValue; // work around a gcc warning | ||||||
3637 | switch (VK) { | ||||||
3638 | case VK_PRValue: | ||||||
3639 | S.Kind = SK_QualificationConversionPRValue; | ||||||
3640 | break; | ||||||
3641 | case VK_XValue: | ||||||
3642 | S.Kind = SK_QualificationConversionXValue; | ||||||
3643 | break; | ||||||
3644 | case VK_LValue: | ||||||
3645 | S.Kind = SK_QualificationConversionLValue; | ||||||
3646 | break; | ||||||
3647 | } | ||||||
3648 | S.Type = Ty; | ||||||
3649 | Steps.push_back(S); | ||||||
3650 | } | ||||||
3651 | |||||||
3652 | void InitializationSequence::AddFunctionReferenceConversionStep(QualType Ty) { | ||||||
3653 | Step S; | ||||||
3654 | S.Kind = SK_FunctionReferenceConversion; | ||||||
3655 | S.Type = Ty; | ||||||
3656 | Steps.push_back(S); | ||||||
3657 | } | ||||||
3658 | |||||||
3659 | void InitializationSequence::AddAtomicConversionStep(QualType Ty) { | ||||||
3660 | Step S; | ||||||
3661 | S.Kind = SK_AtomicConversion; | ||||||
3662 | S.Type = Ty; | ||||||
3663 | Steps.push_back(S); | ||||||
3664 | } | ||||||
3665 | |||||||
3666 | void InitializationSequence::AddConversionSequenceStep( | ||||||
3667 | const ImplicitConversionSequence &ICS, QualType T, | ||||||
3668 | bool TopLevelOfInitList) { | ||||||
3669 | Step S; | ||||||
3670 | S.Kind = TopLevelOfInitList ? SK_ConversionSequenceNoNarrowing | ||||||
3671 | : SK_ConversionSequence; | ||||||
3672 | S.Type = T; | ||||||
3673 | S.ICS = new ImplicitConversionSequence(ICS); | ||||||
3674 | Steps.push_back(S); | ||||||
3675 | } | ||||||
3676 | |||||||
3677 | void InitializationSequence::AddListInitializationStep(QualType T) { | ||||||
3678 | Step S; | ||||||
3679 | S.Kind = SK_ListInitialization; | ||||||
3680 | S.Type = T; | ||||||
3681 | Steps.push_back(S); | ||||||
3682 | } | ||||||
3683 | |||||||
3684 | void InitializationSequence::AddConstructorInitializationStep( | ||||||
3685 | DeclAccessPair FoundDecl, CXXConstructorDecl *Constructor, QualType T, | ||||||
3686 | bool HadMultipleCandidates, bool FromInitList, bool AsInitList) { | ||||||
3687 | Step S; | ||||||
3688 | S.Kind = FromInitList ? AsInitList ? SK_StdInitializerListConstructorCall | ||||||
3689 | : SK_ConstructorInitializationFromList | ||||||
3690 | : SK_ConstructorInitialization; | ||||||
3691 | S.Type = T; | ||||||
3692 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||||
3693 | S.Function.Function = Constructor; | ||||||
3694 | S.Function.FoundDecl = FoundDecl; | ||||||
3695 | Steps.push_back(S); | ||||||
3696 | } | ||||||
3697 | |||||||
3698 | void InitializationSequence::AddZeroInitializationStep(QualType T) { | ||||||
3699 | Step S; | ||||||
3700 | S.Kind = SK_ZeroInitialization; | ||||||
3701 | S.Type = T; | ||||||
3702 | Steps.push_back(S); | ||||||
3703 | } | ||||||
3704 | |||||||
3705 | void InitializationSequence::AddCAssignmentStep(QualType T) { | ||||||
3706 | Step S; | ||||||
3707 | S.Kind = SK_CAssignment; | ||||||
3708 | S.Type = T; | ||||||
3709 | Steps.push_back(S); | ||||||
3710 | } | ||||||
3711 | |||||||
3712 | void InitializationSequence::AddStringInitStep(QualType T) { | ||||||
3713 | Step S; | ||||||
3714 | S.Kind = SK_StringInit; | ||||||
3715 | S.Type = T; | ||||||
3716 | Steps.push_back(S); | ||||||
3717 | } | ||||||
3718 | |||||||
3719 | void InitializationSequence::AddObjCObjectConversionStep(QualType T) { | ||||||
3720 | Step S; | ||||||
3721 | S.Kind = SK_ObjCObjectConversion; | ||||||
3722 | S.Type = T; | ||||||
3723 | Steps.push_back(S); | ||||||
3724 | } | ||||||
3725 | |||||||
3726 | void InitializationSequence::AddArrayInitStep(QualType T, bool IsGNUExtension) { | ||||||
3727 | Step S; | ||||||
3728 | S.Kind = IsGNUExtension ? SK_GNUArrayInit : SK_ArrayInit; | ||||||
3729 | S.Type = T; | ||||||
3730 | Steps.push_back(S); | ||||||
3731 | } | ||||||
3732 | |||||||
3733 | void InitializationSequence::AddArrayInitLoopStep(QualType T, QualType EltT) { | ||||||
3734 | Step S; | ||||||
3735 | S.Kind = SK_ArrayLoopIndex; | ||||||
3736 | S.Type = EltT; | ||||||
3737 | Steps.insert(Steps.begin(), S); | ||||||
3738 | |||||||
3739 | S.Kind = SK_ArrayLoopInit; | ||||||
3740 | S.Type = T; | ||||||
3741 | Steps.push_back(S); | ||||||
3742 | } | ||||||
3743 | |||||||
3744 | void InitializationSequence::AddParenthesizedArrayInitStep(QualType T) { | ||||||
3745 | Step S; | ||||||
3746 | S.Kind = SK_ParenthesizedArrayInit; | ||||||
3747 | S.Type = T; | ||||||
3748 | Steps.push_back(S); | ||||||
3749 | } | ||||||
3750 | |||||||
3751 | void InitializationSequence::AddPassByIndirectCopyRestoreStep(QualType type, | ||||||
3752 | bool shouldCopy) { | ||||||
3753 | Step s; | ||||||
3754 | s.Kind = (shouldCopy ? SK_PassByIndirectCopyRestore | ||||||
3755 | : SK_PassByIndirectRestore); | ||||||
3756 | s.Type = type; | ||||||
3757 | Steps.push_back(s); | ||||||
3758 | } | ||||||
3759 | |||||||
3760 | void InitializationSequence::AddProduceObjCObjectStep(QualType T) { | ||||||
3761 | Step S; | ||||||
3762 | S.Kind = SK_ProduceObjCObject; | ||||||
3763 | S.Type = T; | ||||||
3764 | Steps.push_back(S); | ||||||
3765 | } | ||||||
3766 | |||||||
3767 | void InitializationSequence::AddStdInitializerListConstructionStep(QualType T) { | ||||||
3768 | Step S; | ||||||
3769 | S.Kind = SK_StdInitializerList; | ||||||
3770 | S.Type = T; | ||||||
3771 | Steps.push_back(S); | ||||||
3772 | } | ||||||
3773 | |||||||
3774 | void InitializationSequence::AddOCLSamplerInitStep(QualType T) { | ||||||
3775 | Step S; | ||||||
3776 | S.Kind = SK_OCLSamplerInit; | ||||||
3777 | S.Type = T; | ||||||
3778 | Steps.push_back(S); | ||||||
3779 | } | ||||||
3780 | |||||||
3781 | void InitializationSequence::AddOCLZeroOpaqueTypeStep(QualType T) { | ||||||
3782 | Step S; | ||||||
3783 | S.Kind = SK_OCLZeroOpaqueType; | ||||||
3784 | S.Type = T; | ||||||
3785 | Steps.push_back(S); | ||||||
3786 | } | ||||||
3787 | |||||||
3788 | void InitializationSequence::RewrapReferenceInitList(QualType T, | ||||||
3789 | InitListExpr *Syntactic) { | ||||||
3790 | assert(Syntactic->getNumInits() == 1 &&(static_cast <bool> (Syntactic->getNumInits() == 1 && "Can only rewrap trivial init lists.") ? void (0) : __assert_fail ("Syntactic->getNumInits() == 1 && \"Can only rewrap trivial init lists.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3791, __extension__ __PRETTY_FUNCTION__)) | ||||||
3791 | "Can only rewrap trivial init lists.")(static_cast <bool> (Syntactic->getNumInits() == 1 && "Can only rewrap trivial init lists.") ? void (0) : __assert_fail ("Syntactic->getNumInits() == 1 && \"Can only rewrap trivial init lists.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3791, __extension__ __PRETTY_FUNCTION__)); | ||||||
3792 | Step S; | ||||||
3793 | S.Kind = SK_UnwrapInitList; | ||||||
3794 | S.Type = Syntactic->getInit(0)->getType(); | ||||||
3795 | Steps.insert(Steps.begin(), S); | ||||||
3796 | |||||||
3797 | S.Kind = SK_RewrapInitList; | ||||||
3798 | S.Type = T; | ||||||
3799 | S.WrappingSyntacticList = Syntactic; | ||||||
3800 | Steps.push_back(S); | ||||||
3801 | } | ||||||
3802 | |||||||
3803 | void InitializationSequence::SetOverloadFailure(FailureKind Failure, | ||||||
3804 | OverloadingResult Result) { | ||||||
3805 | setSequenceKind(FailedSequence); | ||||||
3806 | this->Failure = Failure; | ||||||
3807 | this->FailedOverloadResult = Result; | ||||||
3808 | } | ||||||
3809 | |||||||
3810 | //===----------------------------------------------------------------------===// | ||||||
3811 | // Attempt initialization | ||||||
3812 | //===----------------------------------------------------------------------===// | ||||||
3813 | |||||||
3814 | /// Tries to add a zero initializer. Returns true if that worked. | ||||||
3815 | static bool | ||||||
3816 | maybeRecoverWithZeroInitialization(Sema &S, InitializationSequence &Sequence, | ||||||
3817 | const InitializedEntity &Entity) { | ||||||
3818 | if (Entity.getKind() != InitializedEntity::EK_Variable) | ||||||
3819 | return false; | ||||||
3820 | |||||||
3821 | VarDecl *VD = cast<VarDecl>(Entity.getDecl()); | ||||||
3822 | if (VD->getInit() || VD->getEndLoc().isMacroID()) | ||||||
3823 | return false; | ||||||
3824 | |||||||
3825 | QualType VariableTy = VD->getType().getCanonicalType(); | ||||||
3826 | SourceLocation Loc = S.getLocForEndOfToken(VD->getEndLoc()); | ||||||
3827 | std::string Init = S.getFixItZeroInitializerForType(VariableTy, Loc); | ||||||
3828 | if (!Init.empty()) { | ||||||
3829 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||||
3830 | Sequence.SetZeroInitializationFixit(Init, Loc); | ||||||
3831 | return true; | ||||||
3832 | } | ||||||
3833 | return false; | ||||||
3834 | } | ||||||
3835 | |||||||
3836 | static void MaybeProduceObjCObject(Sema &S, | ||||||
3837 | InitializationSequence &Sequence, | ||||||
3838 | const InitializedEntity &Entity) { | ||||||
3839 | if (!S.getLangOpts().ObjCAutoRefCount) return; | ||||||
3840 | |||||||
3841 | /// When initializing a parameter, produce the value if it's marked | ||||||
3842 | /// __attribute__((ns_consumed)). | ||||||
3843 | if (Entity.isParameterKind()) { | ||||||
3844 | if (!Entity.isParameterConsumed()) | ||||||
3845 | return; | ||||||
3846 | |||||||
3847 | assert(Entity.getType()->isObjCRetainableType() &&(static_cast <bool> (Entity.getType()->isObjCRetainableType () && "consuming an object of unretainable type?") ? void (0) : __assert_fail ("Entity.getType()->isObjCRetainableType() && \"consuming an object of unretainable type?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)) | ||||||
3848 | "consuming an object of unretainable type?")(static_cast <bool> (Entity.getType()->isObjCRetainableType () && "consuming an object of unretainable type?") ? void (0) : __assert_fail ("Entity.getType()->isObjCRetainableType() && \"consuming an object of unretainable type?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)); | ||||||
3849 | Sequence.AddProduceObjCObjectStep(Entity.getType()); | ||||||
3850 | |||||||
3851 | /// When initializing a return value, if the return type is a | ||||||
3852 | /// retainable type, then returns need to immediately retain the | ||||||
3853 | /// object. If an autorelease is required, it will be done at the | ||||||
3854 | /// last instant. | ||||||
3855 | } else if (Entity.getKind() == InitializedEntity::EK_Result || | ||||||
3856 | Entity.getKind() == InitializedEntity::EK_StmtExprResult) { | ||||||
3857 | if (!Entity.getType()->isObjCRetainableType()) | ||||||
3858 | return; | ||||||
3859 | |||||||
3860 | Sequence.AddProduceObjCObjectStep(Entity.getType()); | ||||||
3861 | } | ||||||
3862 | } | ||||||
3863 | |||||||
3864 | static void TryListInitialization(Sema &S, | ||||||
3865 | const InitializedEntity &Entity, | ||||||
3866 | const InitializationKind &Kind, | ||||||
3867 | InitListExpr *InitList, | ||||||
3868 | InitializationSequence &Sequence, | ||||||
3869 | bool TreatUnavailableAsInvalid); | ||||||
3870 | |||||||
3871 | /// When initializing from init list via constructor, handle | ||||||
3872 | /// initialization of an object of type std::initializer_list<T>. | ||||||
3873 | /// | ||||||
3874 | /// \return true if we have handled initialization of an object of type | ||||||
3875 | /// std::initializer_list<T>, false otherwise. | ||||||
3876 | static bool TryInitializerListConstruction(Sema &S, | ||||||
3877 | InitListExpr *List, | ||||||
3878 | QualType DestType, | ||||||
3879 | InitializationSequence &Sequence, | ||||||
3880 | bool TreatUnavailableAsInvalid) { | ||||||
3881 | QualType E; | ||||||
3882 | if (!S.isStdInitializerList(DestType, &E)) | ||||||
3883 | return false; | ||||||
3884 | |||||||
3885 | if (!S.isCompleteType(List->getExprLoc(), E)) { | ||||||
3886 | Sequence.setIncompleteTypeFailure(E); | ||||||
3887 | return true; | ||||||
3888 | } | ||||||
3889 | |||||||
3890 | // Try initializing a temporary array from the init list. | ||||||
3891 | QualType ArrayType = S.Context.getConstantArrayType( | ||||||
3892 | E.withConst(), | ||||||
3893 | llvm::APInt(S.Context.getTypeSize(S.Context.getSizeType()), | ||||||
3894 | List->getNumInits()), | ||||||
3895 | nullptr, clang::ArrayType::Normal, 0); | ||||||
3896 | InitializedEntity HiddenArray = | ||||||
3897 | InitializedEntity::InitializeTemporary(ArrayType); | ||||||
3898 | InitializationKind Kind = InitializationKind::CreateDirectList( | ||||||
3899 | List->getExprLoc(), List->getBeginLoc(), List->getEndLoc()); | ||||||
3900 | TryListInitialization(S, HiddenArray, Kind, List, Sequence, | ||||||
3901 | TreatUnavailableAsInvalid); | ||||||
3902 | if (Sequence) | ||||||
3903 | Sequence.AddStdInitializerListConstructionStep(DestType); | ||||||
3904 | return true; | ||||||
3905 | } | ||||||
3906 | |||||||
3907 | /// Determine if the constructor has the signature of a copy or move | ||||||
3908 | /// constructor for the type T of the class in which it was found. That is, | ||||||
3909 | /// determine if its first parameter is of type T or reference to (possibly | ||||||
3910 | /// cv-qualified) T. | ||||||
3911 | static bool hasCopyOrMoveCtorParam(ASTContext &Ctx, | ||||||
3912 | const ConstructorInfo &Info) { | ||||||
3913 | if (Info.Constructor->getNumParams() == 0) | ||||||
3914 | return false; | ||||||
3915 | |||||||
3916 | QualType ParmT = | ||||||
3917 | Info.Constructor->getParamDecl(0)->getType().getNonReferenceType(); | ||||||
3918 | QualType ClassT = | ||||||
3919 | Ctx.getRecordType(cast<CXXRecordDecl>(Info.FoundDecl->getDeclContext())); | ||||||
3920 | |||||||
3921 | return Ctx.hasSameUnqualifiedType(ParmT, ClassT); | ||||||
3922 | } | ||||||
3923 | |||||||
3924 | static OverloadingResult | ||||||
3925 | ResolveConstructorOverload(Sema &S, SourceLocation DeclLoc, | ||||||
3926 | MultiExprArg Args, | ||||||
3927 | OverloadCandidateSet &CandidateSet, | ||||||
3928 | QualType DestType, | ||||||
3929 | DeclContext::lookup_result Ctors, | ||||||
3930 | OverloadCandidateSet::iterator &Best, | ||||||
3931 | bool CopyInitializing, bool AllowExplicit, | ||||||
3932 | bool OnlyListConstructors, bool IsListInit, | ||||||
3933 | bool SecondStepOfCopyInit = false) { | ||||||
3934 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByConstructor); | ||||||
3935 | CandidateSet.setDestAS(DestType.getQualifiers().getAddressSpace()); | ||||||
3936 | |||||||
3937 | for (NamedDecl *D : Ctors) { | ||||||
3938 | auto Info = getConstructorInfo(D); | ||||||
3939 | if (!Info.Constructor || Info.Constructor->isInvalidDecl()) | ||||||
3940 | continue; | ||||||
3941 | |||||||
3942 | if (OnlyListConstructors && !S.isInitListConstructor(Info.Constructor)) | ||||||
3943 | continue; | ||||||
3944 | |||||||
3945 | // C++11 [over.best.ics]p4: | ||||||
3946 | // ... and the constructor or user-defined conversion function is a | ||||||
3947 | // candidate by | ||||||
3948 | // - 13.3.1.3, when the argument is the temporary in the second step | ||||||
3949 | // of a class copy-initialization, or | ||||||
3950 | // - 13.3.1.4, 13.3.1.5, or 13.3.1.6 (in all cases), [not handled here] | ||||||
3951 | // - the second phase of 13.3.1.7 when the initializer list has exactly | ||||||
3952 | // one element that is itself an initializer list, and the target is | ||||||
3953 | // the first parameter of a constructor of class X, and the conversion | ||||||
3954 | // is to X or reference to (possibly cv-qualified X), | ||||||
3955 | // user-defined conversion sequences are not considered. | ||||||
3956 | bool SuppressUserConversions = | ||||||
3957 | SecondStepOfCopyInit || | ||||||
3958 | (IsListInit && Args.size() == 1 && isa<InitListExpr>(Args[0]) && | ||||||
3959 | hasCopyOrMoveCtorParam(S.Context, Info)); | ||||||
3960 | |||||||
3961 | if (Info.ConstructorTmpl) | ||||||
3962 | S.AddTemplateOverloadCandidate( | ||||||
3963 | Info.ConstructorTmpl, Info.FoundDecl, | ||||||
3964 | /*ExplicitArgs*/ nullptr, Args, CandidateSet, SuppressUserConversions, | ||||||
3965 | /*PartialOverloading=*/false, AllowExplicit); | ||||||
3966 | else { | ||||||
3967 | // C++ [over.match.copy]p1: | ||||||
3968 | // - When initializing a temporary to be bound to the first parameter | ||||||
3969 | // of a constructor [for type T] that takes a reference to possibly | ||||||
3970 | // cv-qualified T as its first argument, called with a single | ||||||
3971 | // argument in the context of direct-initialization, explicit | ||||||
3972 | // conversion functions are also considered. | ||||||
3973 | // FIXME: What if a constructor template instantiates to such a signature? | ||||||
3974 | bool AllowExplicitConv = AllowExplicit && !CopyInitializing && | ||||||
3975 | Args.size() == 1 && | ||||||
3976 | hasCopyOrMoveCtorParam(S.Context, Info); | ||||||
3977 | S.AddOverloadCandidate(Info.Constructor, Info.FoundDecl, Args, | ||||||
3978 | CandidateSet, SuppressUserConversions, | ||||||
3979 | /*PartialOverloading=*/false, AllowExplicit, | ||||||
3980 | AllowExplicitConv); | ||||||
3981 | } | ||||||
3982 | } | ||||||
3983 | |||||||
3984 | // FIXME: Work around a bug in C++17 guaranteed copy elision. | ||||||
3985 | // | ||||||
3986 | // When initializing an object of class type T by constructor | ||||||
3987 | // ([over.match.ctor]) or by list-initialization ([over.match.list]) | ||||||
3988 | // from a single expression of class type U, conversion functions of | ||||||
3989 | // U that convert to the non-reference type cv T are candidates. | ||||||
3990 | // Explicit conversion functions are only candidates during | ||||||
3991 | // direct-initialization. | ||||||
3992 | // | ||||||
3993 | // Note: SecondStepOfCopyInit is only ever true in this case when | ||||||
3994 | // evaluating whether to produce a C++98 compatibility warning. | ||||||
3995 | if (S.getLangOpts().CPlusPlus17 && Args.size() == 1 && | ||||||
3996 | !SecondStepOfCopyInit) { | ||||||
3997 | Expr *Initializer = Args[0]; | ||||||
3998 | auto *SourceRD = Initializer->getType()->getAsCXXRecordDecl(); | ||||||
3999 | if (SourceRD && S.isCompleteType(DeclLoc, Initializer->getType())) { | ||||||
4000 | const auto &Conversions = SourceRD->getVisibleConversionFunctions(); | ||||||
4001 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||||
4002 | NamedDecl *D = *I; | ||||||
4003 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||||
4004 | D = D->getUnderlyingDecl(); | ||||||
4005 | |||||||
4006 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||||
4007 | CXXConversionDecl *Conv; | ||||||
4008 | if (ConvTemplate) | ||||||
4009 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||||
4010 | else | ||||||
4011 | Conv = cast<CXXConversionDecl>(D); | ||||||
4012 | |||||||
4013 | if (ConvTemplate) | ||||||
4014 | S.AddTemplateConversionCandidate( | ||||||
4015 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||||
4016 | CandidateSet, AllowExplicit, AllowExplicit, | ||||||
4017 | /*AllowResultConversion*/ false); | ||||||
4018 | else | ||||||
4019 | S.AddConversionCandidate(Conv, I.getPair(), ActingDC, Initializer, | ||||||
4020 | DestType, CandidateSet, AllowExplicit, | ||||||
4021 | AllowExplicit, | ||||||
4022 | /*AllowResultConversion*/ false); | ||||||
4023 | } | ||||||
4024 | } | ||||||
4025 | } | ||||||
4026 | |||||||
4027 | // Perform overload resolution and return the result. | ||||||
4028 | return CandidateSet.BestViableFunction(S, DeclLoc, Best); | ||||||
4029 | } | ||||||
4030 | |||||||
4031 | /// Attempt initialization by constructor (C++ [dcl.init]), which | ||||||
4032 | /// enumerates the constructors of the initialized entity and performs overload | ||||||
4033 | /// resolution to select the best. | ||||||
4034 | /// \param DestType The destination class type. | ||||||
4035 | /// \param DestArrayType The destination type, which is either DestType or | ||||||
4036 | /// a (possibly multidimensional) array of DestType. | ||||||
4037 | /// \param IsListInit Is this list-initialization? | ||||||
4038 | /// \param IsInitListCopy Is this non-list-initialization resulting from a | ||||||
4039 | /// list-initialization from {x} where x is the same | ||||||
4040 | /// type as the entity? | ||||||
4041 | static void TryConstructorInitialization(Sema &S, | ||||||
4042 | const InitializedEntity &Entity, | ||||||
4043 | const InitializationKind &Kind, | ||||||
4044 | MultiExprArg Args, QualType DestType, | ||||||
4045 | QualType DestArrayType, | ||||||
4046 | InitializationSequence &Sequence, | ||||||
4047 | bool IsListInit = false, | ||||||
4048 | bool IsInitListCopy = false) { | ||||||
4049 | assert(((!IsListInit && !IsInitListCopy) ||(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||||
4050 | (Args.size() == 1 && isa<InitListExpr>(Args[0]))) &&(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||||
4051 | "IsListInit/IsInitListCopy must come with a single initializer list "(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||||
4052 | "argument.")(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)); | ||||||
4053 | InitListExpr *ILE = | ||||||
4054 | (IsListInit || IsInitListCopy) ? cast<InitListExpr>(Args[0]) : nullptr; | ||||||
4055 | MultiExprArg UnwrappedArgs = | ||||||
4056 | ILE ? MultiExprArg(ILE->getInits(), ILE->getNumInits()) : Args; | ||||||
4057 | |||||||
4058 | // The type we're constructing needs to be complete. | ||||||
4059 | if (!S.isCompleteType(Kind.getLocation(), DestType)) { | ||||||
4060 | Sequence.setIncompleteTypeFailure(DestType); | ||||||
4061 | return; | ||||||
4062 | } | ||||||
4063 | |||||||
4064 | // C++17 [dcl.init]p17: | ||||||
4065 | // - If the initializer expression is a prvalue and the cv-unqualified | ||||||
4066 | // version of the source type is the same class as the class of the | ||||||
4067 | // destination, the initializer expression is used to initialize the | ||||||
4068 | // destination object. | ||||||
4069 | // Per DR (no number yet), this does not apply when initializing a base | ||||||
4070 | // class or delegating to another constructor from a mem-initializer. | ||||||
4071 | // ObjC++: Lambda captured by the block in the lambda to block conversion | ||||||
4072 | // should avoid copy elision. | ||||||
4073 | if (S.getLangOpts().CPlusPlus17 && | ||||||
4074 | Entity.getKind() != InitializedEntity::EK_Base && | ||||||
4075 | Entity.getKind() != InitializedEntity::EK_Delegating && | ||||||
4076 | Entity.getKind() != | ||||||
4077 | InitializedEntity::EK_LambdaToBlockConversionBlockElement && | ||||||
4078 | UnwrappedArgs.size() == 1 && UnwrappedArgs[0]->isPRValue() && | ||||||
4079 | S.Context.hasSameUnqualifiedType(UnwrappedArgs[0]->getType(), DestType)) { | ||||||
4080 | // Convert qualifications if necessary. | ||||||
4081 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||||
4082 | if (ILE) | ||||||
4083 | Sequence.RewrapReferenceInitList(DestType, ILE); | ||||||
4084 | return; | ||||||
4085 | } | ||||||
4086 | |||||||
4087 | const RecordType *DestRecordType = DestType->getAs<RecordType>(); | ||||||
4088 | assert(DestRecordType && "Constructor initialization requires record type")(static_cast <bool> (DestRecordType && "Constructor initialization requires record type" ) ? void (0) : __assert_fail ("DestRecordType && \"Constructor initialization requires record type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4088, __extension__ __PRETTY_FUNCTION__)); | ||||||
4089 | CXXRecordDecl *DestRecordDecl | ||||||
4090 | = cast<CXXRecordDecl>(DestRecordType->getDecl()); | ||||||
4091 | |||||||
4092 | // Build the candidate set directly in the initialization sequence | ||||||
4093 | // structure, so that it will persist if we fail. | ||||||
4094 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||||
4095 | |||||||
4096 | // Determine whether we are allowed to call explicit constructors or | ||||||
4097 | // explicit conversion operators. | ||||||
4098 | bool AllowExplicit = Kind.AllowExplicit() || IsListInit; | ||||||
4099 | bool CopyInitialization = Kind.getKind() == InitializationKind::IK_Copy; | ||||||
4100 | |||||||
4101 | // - Otherwise, if T is a class type, constructors are considered. The | ||||||
4102 | // applicable constructors are enumerated, and the best one is chosen | ||||||
4103 | // through overload resolution. | ||||||
4104 | DeclContext::lookup_result Ctors = S.LookupConstructors(DestRecordDecl); | ||||||
4105 | |||||||
4106 | OverloadingResult Result = OR_No_Viable_Function; | ||||||
4107 | OverloadCandidateSet::iterator Best; | ||||||
4108 | bool AsInitializerList = false; | ||||||
4109 | |||||||
4110 | // C++11 [over.match.list]p1, per DR1467: | ||||||
4111 | // When objects of non-aggregate type T are list-initialized, such that | ||||||
4112 | // 8.5.4 [dcl.init.list] specifies that overload resolution is performed | ||||||
4113 | // according to the rules in this section, overload resolution selects | ||||||
4114 | // the constructor in two phases: | ||||||
4115 | // | ||||||
4116 | // - Initially, the candidate functions are the initializer-list | ||||||
4117 | // constructors of the class T and the argument list consists of the | ||||||
4118 | // initializer list as a single argument. | ||||||
4119 | if (IsListInit) { | ||||||
4120 | AsInitializerList = true; | ||||||
4121 | |||||||
4122 | // If the initializer list has no elements and T has a default constructor, | ||||||
4123 | // the first phase is omitted. | ||||||
4124 | if (!(UnwrappedArgs.empty() && S.LookupDefaultConstructor(DestRecordDecl))) | ||||||
4125 | Result = ResolveConstructorOverload(S, Kind.getLocation(), Args, | ||||||
4126 | CandidateSet, DestType, Ctors, Best, | ||||||
4127 | CopyInitialization, AllowExplicit, | ||||||
4128 | /*OnlyListConstructors=*/true, | ||||||
4129 | IsListInit); | ||||||
4130 | } | ||||||
4131 | |||||||
4132 | // C++11 [over.match.list]p1: | ||||||
4133 | // - If no viable initializer-list constructor is found, overload resolution | ||||||
4134 | // is performed again, where the candidate functions are all the | ||||||
4135 | // constructors of the class T and the argument list consists of the | ||||||
4136 | // elements of the initializer list. | ||||||
4137 | if (Result == OR_No_Viable_Function) { | ||||||
4138 | AsInitializerList = false; | ||||||
4139 | Result = ResolveConstructorOverload(S, Kind.getLocation(), UnwrappedArgs, | ||||||
4140 | CandidateSet, DestType, Ctors, Best, | ||||||
4141 | CopyInitialization, AllowExplicit, | ||||||
4142 | /*OnlyListConstructors=*/false, | ||||||
4143 | IsListInit); | ||||||
4144 | } | ||||||
4145 | if (Result) { | ||||||
4146 | Sequence.SetOverloadFailure( | ||||||
4147 | IsListInit ? InitializationSequence::FK_ListConstructorOverloadFailed | ||||||
4148 | : InitializationSequence::FK_ConstructorOverloadFailed, | ||||||
4149 | Result); | ||||||
4150 | |||||||
4151 | if (Result != OR_Deleted) | ||||||
4152 | return; | ||||||
4153 | } | ||||||
4154 | |||||||
4155 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||||
4156 | |||||||
4157 | // In C++17, ResolveConstructorOverload can select a conversion function | ||||||
4158 | // instead of a constructor. | ||||||
4159 | if (auto *CD = dyn_cast<CXXConversionDecl>(Best->Function)) { | ||||||
4160 | // Add the user-defined conversion step that calls the conversion function. | ||||||
4161 | QualType ConvType = CD->getConversionType(); | ||||||
4162 | assert(S.Context.hasSameUnqualifiedType(ConvType, DestType) &&(static_cast <bool> (S.Context.hasSameUnqualifiedType(ConvType , DestType) && "should not have selected this conversion function" ) ? void (0) : __assert_fail ("S.Context.hasSameUnqualifiedType(ConvType, DestType) && \"should not have selected this conversion function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4163, __extension__ __PRETTY_FUNCTION__)) | ||||||
4163 | "should not have selected this conversion function")(static_cast <bool> (S.Context.hasSameUnqualifiedType(ConvType , DestType) && "should not have selected this conversion function" ) ? void (0) : __assert_fail ("S.Context.hasSameUnqualifiedType(ConvType, DestType) && \"should not have selected this conversion function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4163, __extension__ __PRETTY_FUNCTION__)); | ||||||
4164 | Sequence.AddUserConversionStep(CD, Best->FoundDecl, ConvType, | ||||||
4165 | HadMultipleCandidates); | ||||||
4166 | if (!S.Context.hasSameType(ConvType, DestType)) | ||||||
4167 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||||
4168 | if (IsListInit) | ||||||
4169 | Sequence.RewrapReferenceInitList(Entity.getType(), ILE); | ||||||
4170 | return; | ||||||
4171 | } | ||||||
4172 | |||||||
4173 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||||
4174 | if (Result != OR_Deleted) { | ||||||
4175 | // C++11 [dcl.init]p6: | ||||||
4176 | // If a program calls for the default initialization of an object | ||||||
4177 | // of a const-qualified type T, T shall be a class type with a | ||||||
4178 | // user-provided default constructor. | ||||||
4179 | // C++ core issue 253 proposal: | ||||||
4180 | // If the implicit default constructor initializes all subobjects, no | ||||||
4181 | // initializer should be required. | ||||||
4182 | // The 253 proposal is for example needed to process libstdc++ headers | ||||||
4183 | // in 5.x. | ||||||
4184 | if (Kind.getKind() == InitializationKind::IK_Default && | ||||||
4185 | Entity.getType().isConstQualified()) { | ||||||
4186 | if (!CtorDecl->getParent()->allowConstDefaultInit()) { | ||||||
4187 | if (!maybeRecoverWithZeroInitialization(S, Sequence, Entity)) | ||||||
4188 | Sequence.SetFailed(InitializationSequence::FK_DefaultInitOfConst); | ||||||
4189 | return; | ||||||
4190 | } | ||||||
4191 | } | ||||||
4192 | |||||||
4193 | // C++11 [over.match.list]p1: | ||||||
4194 | // In copy-list-initialization, if an explicit constructor is chosen, the | ||||||
4195 | // initializer is ill-formed. | ||||||
4196 | if (IsListInit && !Kind.AllowExplicit() && CtorDecl->isExplicit()) { | ||||||
4197 | Sequence.SetFailed(InitializationSequence::FK_ExplicitConstructor); | ||||||
4198 | return; | ||||||
4199 | } | ||||||
4200 | } | ||||||
4201 | |||||||
4202 | // [class.copy.elision]p3: | ||||||
4203 | // In some copy-initialization contexts, a two-stage overload resolution | ||||||
4204 | // is performed. | ||||||
4205 | // If the first overload resolution selects a deleted function, we also | ||||||
4206 | // need the initialization sequence to decide whether to perform the second | ||||||
4207 | // overload resolution. | ||||||
4208 | // For deleted functions in other contexts, there is no need to get the | ||||||
4209 | // initialization sequence. | ||||||
4210 | if (Result == OR_Deleted && Kind.getKind() != InitializationKind::IK_Copy) | ||||||
4211 | return; | ||||||
4212 | |||||||
4213 | // Add the constructor initialization step. Any cv-qualification conversion is | ||||||
4214 | // subsumed by the initialization. | ||||||
4215 | Sequence.AddConstructorInitializationStep( | ||||||
4216 | Best->FoundDecl, CtorDecl, DestArrayType, HadMultipleCandidates, | ||||||
4217 | IsListInit | IsInitListCopy, AsInitializerList); | ||||||
4218 | } | ||||||
4219 | |||||||
4220 | static bool | ||||||
4221 | ResolveOverloadedFunctionForReferenceBinding(Sema &S, | ||||||
4222 | Expr *Initializer, | ||||||
4223 | QualType &SourceType, | ||||||
4224 | QualType &UnqualifiedSourceType, | ||||||
4225 | QualType UnqualifiedTargetType, | ||||||
4226 | InitializationSequence &Sequence) { | ||||||
4227 | if (S.Context.getCanonicalType(UnqualifiedSourceType) == | ||||||
4228 | S.Context.OverloadTy) { | ||||||
4229 | DeclAccessPair Found; | ||||||
4230 | bool HadMultipleCandidates = false; | ||||||
4231 | if (FunctionDecl *Fn | ||||||
4232 | = S.ResolveAddressOfOverloadedFunction(Initializer, | ||||||
4233 | UnqualifiedTargetType, | ||||||
4234 | false, Found, | ||||||
4235 | &HadMultipleCandidates)) { | ||||||
4236 | Sequence.AddAddressOverloadResolutionStep(Fn, Found, | ||||||
4237 | HadMultipleCandidates); | ||||||
4238 | SourceType = Fn->getType(); | ||||||
4239 | UnqualifiedSourceType = SourceType.getUnqualifiedType(); | ||||||
4240 | } else if (!UnqualifiedTargetType->isRecordType()) { | ||||||
4241 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||||
4242 | return true; | ||||||
4243 | } | ||||||
4244 | } | ||||||
4245 | return false; | ||||||
4246 | } | ||||||
4247 | |||||||
4248 | static void TryReferenceInitializationCore(Sema &S, | ||||||
4249 | const InitializedEntity &Entity, | ||||||
4250 | const InitializationKind &Kind, | ||||||
4251 | Expr *Initializer, | ||||||
4252 | QualType cv1T1, QualType T1, | ||||||
4253 | Qualifiers T1Quals, | ||||||
4254 | QualType cv2T2, QualType T2, | ||||||
4255 | Qualifiers T2Quals, | ||||||
4256 | InitializationSequence &Sequence); | ||||||
4257 | |||||||
4258 | static void TryValueInitialization(Sema &S, | ||||||
4259 | const InitializedEntity &Entity, | ||||||
4260 | const InitializationKind &Kind, | ||||||
4261 | InitializationSequence &Sequence, | ||||||
4262 | InitListExpr *InitList = nullptr); | ||||||
4263 | |||||||
4264 | /// Attempt list initialization of a reference. | ||||||
4265 | static void TryReferenceListInitialization(Sema &S, | ||||||
4266 | const InitializedEntity &Entity, | ||||||
4267 | const InitializationKind &Kind, | ||||||
4268 | InitListExpr *InitList, | ||||||
4269 | InitializationSequence &Sequence, | ||||||
4270 | bool TreatUnavailableAsInvalid) { | ||||||
4271 | // First, catch C++03 where this isn't possible. | ||||||
4272 | if (!S.getLangOpts().CPlusPlus11) { | ||||||
4273 | Sequence.SetFailed(InitializationSequence::FK_ReferenceBindingToInitList); | ||||||
4274 | return; | ||||||
4275 | } | ||||||
4276 | // Can't reference initialize a compound literal. | ||||||
4277 | if (Entity.getKind() == InitializedEntity::EK_CompoundLiteralInit) { | ||||||
4278 | Sequence.SetFailed(InitializationSequence::FK_ReferenceBindingToInitList); | ||||||
4279 | return; | ||||||
4280 | } | ||||||
4281 | |||||||
4282 | QualType DestType = Entity.getType(); | ||||||
4283 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||||
4284 | Qualifiers T1Quals; | ||||||
4285 | QualType T1 = S.Context.getUnqualifiedArrayType(cv1T1, T1Quals); | ||||||
4286 | |||||||
4287 | // Reference initialization via an initializer list works thus: | ||||||
4288 | // If the initializer list consists of a single element that is | ||||||
4289 | // reference-related to the referenced type, bind directly to that element | ||||||
4290 | // (possibly creating temporaries). | ||||||
4291 | // Otherwise, initialize a temporary with the initializer list and | ||||||
4292 | // bind to that. | ||||||
4293 | if (InitList->getNumInits() == 1) { | ||||||
4294 | Expr *Initializer = InitList->getInit(0); | ||||||
4295 | QualType cv2T2 = S.getCompletedType(Initializer); | ||||||
4296 | Qualifiers T2Quals; | ||||||
4297 | QualType T2 = S.Context.getUnqualifiedArrayType(cv2T2, T2Quals); | ||||||
4298 | |||||||
4299 | // If this fails, creating a temporary wouldn't work either. | ||||||
4300 | if (ResolveOverloadedFunctionForReferenceBinding(S, Initializer, cv2T2, T2, | ||||||
4301 | T1, Sequence)) | ||||||
4302 | return; | ||||||
4303 | |||||||
4304 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||||
4305 | Sema::ReferenceCompareResult RefRelationship | ||||||
4306 | = S.CompareReferenceRelationship(DeclLoc, cv1T1, cv2T2); | ||||||
4307 | if (RefRelationship >= Sema::Ref_Related) { | ||||||
4308 | // Try to bind the reference here. | ||||||
4309 | TryReferenceInitializationCore(S, Entity, Kind, Initializer, cv1T1, T1, | ||||||
4310 | T1Quals, cv2T2, T2, T2Quals, Sequence); | ||||||
4311 | if (Sequence) | ||||||
4312 | Sequence.RewrapReferenceInitList(cv1T1, InitList); | ||||||
4313 | return; | ||||||
4314 | } | ||||||
4315 | |||||||
4316 | // Update the initializer if we've resolved an overloaded function. | ||||||
4317 | if (Sequence.step_begin() != Sequence.step_end()) | ||||||
4318 | Sequence.RewrapReferenceInitList(cv1T1, InitList); | ||||||
4319 | } | ||||||
4320 | // Perform address space compatibility check. | ||||||
4321 | QualType cv1T1IgnoreAS = cv1T1; | ||||||
4322 | if (T1Quals.hasAddressSpace()) { | ||||||
4323 | Qualifiers T2Quals; | ||||||
4324 | (void)S.Context.getUnqualifiedArrayType(InitList->getType(), T2Quals); | ||||||
4325 | if (!T1Quals.isAddressSpaceSupersetOf(T2Quals)) { | ||||||
4326 | Sequence.SetFailed( | ||||||
4327 | InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||||
4328 | return; | ||||||
4329 | } | ||||||
4330 | // Ignore address space of reference type at this point and perform address | ||||||
4331 | // space conversion after the reference binding step. | ||||||
4332 | cv1T1IgnoreAS = | ||||||
4333 | S.Context.getQualifiedType(T1, T1Quals.withoutAddressSpace()); | ||||||
4334 | } | ||||||
4335 | // Not reference-related. Create a temporary and bind to that. | ||||||
4336 | InitializedEntity TempEntity = | ||||||
4337 | InitializedEntity::InitializeTemporary(cv1T1IgnoreAS); | ||||||
4338 | |||||||
4339 | TryListInitialization(S, TempEntity, Kind, InitList, Sequence, | ||||||
4340 | TreatUnavailableAsInvalid); | ||||||
4341 | if (Sequence) { | ||||||
4342 | if (DestType->isRValueReferenceType() || | ||||||
4343 | (T1Quals.hasConst() && !T1Quals.hasVolatile())) { | ||||||
4344 | Sequence.AddReferenceBindingStep(cv1T1IgnoreAS, | ||||||
4345 | /*BindingTemporary=*/true); | ||||||
4346 | if (T1Quals.hasAddressSpace()) | ||||||
4347 | Sequence.AddQualificationConversionStep( | ||||||
4348 | cv1T1, DestType->isRValueReferenceType() ? VK_XValue : VK_LValue); | ||||||
4349 | } else | ||||||
4350 | Sequence.SetFailed( | ||||||
4351 | InitializationSequence::FK_NonConstLValueReferenceBindingToTemporary); | ||||||
4352 | } | ||||||
4353 | } | ||||||
4354 | |||||||
4355 | /// Attempt list initialization (C++0x [dcl.init.list]) | ||||||
4356 | static void TryListInitialization(Sema &S, | ||||||
4357 | const InitializedEntity &Entity, | ||||||
4358 | const InitializationKind &Kind, | ||||||
4359 | InitListExpr *InitList, | ||||||
4360 | InitializationSequence &Sequence, | ||||||
4361 | bool TreatUnavailableAsInvalid) { | ||||||
4362 | QualType DestType = Entity.getType(); | ||||||
4363 | |||||||
4364 | // C++ doesn't allow scalar initialization with more than one argument. | ||||||
4365 | // But C99 complex numbers are scalars and it makes sense there. | ||||||
4366 | if (S.getLangOpts().CPlusPlus && DestType->isScalarType() && | ||||||
4367 | !DestType->isAnyComplexType() && InitList->getNumInits() > 1) { | ||||||
4368 | Sequence.SetFailed(InitializationSequence::FK_TooManyInitsForScalar); | ||||||
4369 | return; | ||||||
4370 | } | ||||||
4371 | if (DestType->isReferenceType()) { | ||||||
4372 | TryReferenceListInitialization(S, Entity, Kind, InitList, Sequence, | ||||||
4373 | TreatUnavailableAsInvalid); | ||||||
4374 | return; | ||||||
4375 | } | ||||||
4376 | |||||||
4377 | if (DestType->isRecordType() && | ||||||
4378 | !S.isCompleteType(InitList->getBeginLoc(), DestType)) { | ||||||
4379 | Sequence.setIncompleteTypeFailure(DestType); | ||||||
4380 | return; | ||||||
4381 | } | ||||||
4382 | |||||||
4383 | // C++11 [dcl.init.list]p3, per DR1467: | ||||||
4384 | // - If T is a class type and the initializer list has a single element of | ||||||
4385 | // type cv U, where U is T or a class derived from T, the object is | ||||||
4386 | // initialized from that element (by copy-initialization for | ||||||
4387 | // copy-list-initialization, or by direct-initialization for | ||||||
4388 | // direct-list-initialization). | ||||||
4389 | // - Otherwise, if T is a character array and the initializer list has a | ||||||
4390 | // single element that is an appropriately-typed string literal | ||||||
4391 | // (8.5.2 [dcl.init.string]), initialization is performed as described | ||||||
4392 | // in that section. | ||||||
4393 | // - Otherwise, if T is an aggregate, [...] (continue below). | ||||||
4394 | if (S.getLangOpts().CPlusPlus11 && InitList->getNumInits() == 1) { | ||||||
4395 | if (DestType->isRecordType()) { | ||||||
4396 | QualType InitType = InitList->getInit(0)->getType(); | ||||||
4397 | if (S.Context.hasSameUnqualifiedType(InitType, DestType) || | ||||||
4398 | S.IsDerivedFrom(InitList->getBeginLoc(), InitType, DestType)) { | ||||||
4399 | Expr *InitListAsExpr = InitList; | ||||||
4400 | TryConstructorInitialization(S, Entity, Kind, InitListAsExpr, DestType, | ||||||
4401 | DestType, Sequence, | ||||||
4402 | /*InitListSyntax*/false, | ||||||
4403 | /*IsInitListCopy*/true); | ||||||
4404 | return; | ||||||
4405 | } | ||||||
4406 | } | ||||||
4407 | if (const ArrayType *DestAT = S.Context.getAsArrayType(DestType)) { | ||||||
4408 | Expr *SubInit[1] = {InitList->getInit(0)}; | ||||||
4409 | if (!isa<VariableArrayType>(DestAT) && | ||||||
4410 | IsStringInit(SubInit[0], DestAT, S.Context) == SIF_None) { | ||||||
4411 | InitializationKind SubKind = | ||||||
4412 | Kind.getKind() == InitializationKind::IK_DirectList | ||||||
4413 | ? InitializationKind::CreateDirect(Kind.getLocation(), | ||||||
4414 | InitList->getLBraceLoc(), | ||||||
4415 | InitList->getRBraceLoc()) | ||||||
4416 | : Kind; | ||||||
4417 | Sequence.InitializeFrom(S, Entity, SubKind, SubInit, | ||||||
4418 | /*TopLevelOfInitList*/ true, | ||||||
4419 | TreatUnavailableAsInvalid); | ||||||
4420 | |||||||
4421 | // TryStringLiteralInitialization() (in InitializeFrom()) will fail if | ||||||
4422 | // the element is not an appropriately-typed string literal, in which | ||||||
4423 | // case we should proceed as in C++11 (below). | ||||||
4424 | if (Sequence) { | ||||||
4425 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||||
4426 | return; | ||||||
4427 | } | ||||||
4428 | } | ||||||
4429 | } | ||||||
4430 | } | ||||||
4431 | |||||||
4432 | // C++11 [dcl.init.list]p3: | ||||||
4433 | // - If T is an aggregate, aggregate initialization is performed. | ||||||
4434 | if ((DestType->isRecordType() && !DestType->isAggregateType()) || | ||||||
4435 | (S.getLangOpts().CPlusPlus11 && | ||||||
4436 | S.isStdInitializerList(DestType, nullptr))) { | ||||||
4437 | if (S.getLangOpts().CPlusPlus11) { | ||||||
4438 | // - Otherwise, if the initializer list has no elements and T is a | ||||||
4439 | // class type with a default constructor, the object is | ||||||
4440 | // value-initialized. | ||||||
4441 | if (InitList->getNumInits() == 0) { | ||||||
4442 | CXXRecordDecl *RD = DestType->getAsCXXRecordDecl(); | ||||||
4443 | if (S.LookupDefaultConstructor(RD)) { | ||||||
4444 | TryValueInitialization(S, Entity, Kind, Sequence, InitList); | ||||||
4445 | return; | ||||||
4446 | } | ||||||
4447 | } | ||||||
4448 | |||||||
4449 | // - Otherwise, if T is a specialization of std::initializer_list<E>, | ||||||
4450 | // an initializer_list object constructed [...] | ||||||
4451 | if (TryInitializerListConstruction(S, InitList, DestType, Sequence, | ||||||
4452 | TreatUnavailableAsInvalid)) | ||||||
4453 | return; | ||||||
4454 | |||||||
4455 | // - Otherwise, if T is a class type, constructors are considered. | ||||||
4456 | Expr *InitListAsExpr = InitList; | ||||||
4457 | TryConstructorInitialization(S, Entity, Kind, InitListAsExpr, DestType, | ||||||
4458 | DestType, Sequence, /*InitListSyntax*/true); | ||||||
4459 | } else | ||||||
4460 | Sequence.SetFailed(InitializationSequence::FK_InitListBadDestinationType); | ||||||
4461 | return; | ||||||
4462 | } | ||||||
4463 | |||||||
4464 | if (S.getLangOpts().CPlusPlus && !DestType->isAggregateType() && | ||||||
4465 | InitList->getNumInits() == 1) { | ||||||
4466 | Expr *E = InitList->getInit(0); | ||||||
4467 | |||||||
4468 | // - Otherwise, if T is an enumeration with a fixed underlying type, | ||||||
4469 | // the initializer-list has a single element v, and the initialization | ||||||
4470 | // is direct-list-initialization, the object is initialized with the | ||||||
4471 | // value T(v); if a narrowing conversion is required to convert v to | ||||||
4472 | // the underlying type of T, the program is ill-formed. | ||||||
4473 | auto *ET = DestType->getAs<EnumType>(); | ||||||
4474 | if (S.getLangOpts().CPlusPlus17 && | ||||||
4475 | Kind.getKind() == InitializationKind::IK_DirectList && | ||||||
4476 | ET && ET->getDecl()->isFixed() && | ||||||
4477 | !S.Context.hasSameUnqualifiedType(E->getType(), DestType) && | ||||||
4478 | (E->getType()->isIntegralOrEnumerationType() || | ||||||
4479 | E->getType()->isFloatingType())) { | ||||||
4480 | // There are two ways that T(v) can work when T is an enumeration type. | ||||||
4481 | // If there is either an implicit conversion sequence from v to T or | ||||||
4482 | // a conversion function that can convert from v to T, then we use that. | ||||||
4483 | // Otherwise, if v is of integral, enumeration, or floating-point type, | ||||||
4484 | // it is converted to the enumeration type via its underlying type. | ||||||
4485 | // There is no overlap possible between these two cases (except when the | ||||||
4486 | // source value is already of the destination type), and the first | ||||||
4487 | // case is handled by the general case for single-element lists below. | ||||||
4488 | ImplicitConversionSequence ICS; | ||||||
4489 | ICS.setStandard(); | ||||||
4490 | ICS.Standard.setAsIdentityConversion(); | ||||||
4491 | if (!E->isPRValue()) | ||||||
4492 | ICS.Standard.First = ICK_Lvalue_To_Rvalue; | ||||||
4493 | // If E is of a floating-point type, then the conversion is ill-formed | ||||||
4494 | // due to narrowing, but go through the motions in order to produce the | ||||||
4495 | // right diagnostic. | ||||||
4496 | ICS.Standard.Second = E->getType()->isFloatingType() | ||||||
4497 | ? ICK_Floating_Integral | ||||||
4498 | : ICK_Integral_Conversion; | ||||||
4499 | ICS.Standard.setFromType(E->getType()); | ||||||
4500 | ICS.Standard.setToType(0, E->getType()); | ||||||
4501 | ICS.Standard.setToType(1, DestType); | ||||||
4502 | ICS.Standard.setToType(2, DestType); | ||||||
4503 | Sequence.AddConversionSequenceStep(ICS, ICS.Standard.getToType(2), | ||||||
4504 | /*TopLevelOfInitList*/true); | ||||||
4505 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||||
4506 | return; | ||||||
4507 | } | ||||||
4508 | |||||||
4509 | // - Otherwise, if the initializer list has a single element of type E | ||||||
4510 | // [...references are handled above...], the object or reference is | ||||||
4511 | // initialized from that element (by copy-initialization for | ||||||
4512 | // copy-list-initialization, or by direct-initialization for | ||||||
4513 | // direct-list-initialization); if a narrowing conversion is required | ||||||
4514 | // to convert the element to T, the program is ill-formed. | ||||||
4515 | // | ||||||
4516 | // Per core-24034, this is direct-initialization if we were performing | ||||||
4517 | // direct-list-initialization and copy-initialization otherwise. | ||||||
4518 | // We can't use InitListChecker for this, because it always performs | ||||||
4519 | // copy-initialization. This only matters if we might use an 'explicit' | ||||||
4520 | // conversion operator, or for the special case conversion of nullptr_t to | ||||||
4521 | // bool, so we only need to handle those cases. | ||||||
4522 | // | ||||||
4523 | // FIXME: Why not do this in all cases? | ||||||
4524 | Expr *Init = InitList->getInit(0); | ||||||
4525 | if (Init->getType()->isRecordType() || | ||||||
4526 | (Init->getType()->isNullPtrType() && DestType->isBooleanType())) { | ||||||
4527 | InitializationKind SubKind = | ||||||
4528 | Kind.getKind() == InitializationKind::IK_DirectList | ||||||
4529 | ? InitializationKind::CreateDirect(Kind.getLocation(), | ||||||
4530 | InitList->getLBraceLoc(), | ||||||
4531 | InitList->getRBraceLoc()) | ||||||
4532 | : Kind; | ||||||
4533 | Expr *SubInit[1] = { Init }; | ||||||
4534 | Sequence.InitializeFrom(S, Entity, SubKind, SubInit, | ||||||
4535 | /*TopLevelOfInitList*/true, | ||||||
4536 | TreatUnavailableAsInvalid); | ||||||
4537 | if (Sequence) | ||||||
4538 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||||
4539 | return; | ||||||
4540 | } | ||||||
4541 | } | ||||||
4542 | |||||||
4543 | InitListChecker CheckInitList(S, Entity, InitList, | ||||||
4544 | DestType, /*VerifyOnly=*/true, TreatUnavailableAsInvalid); | ||||||
4545 | if (CheckInitList.HadError()) { | ||||||
4546 | Sequence.SetFailed(InitializationSequence::FK_ListInitializationFailed); | ||||||
4547 | return; | ||||||
4548 | } | ||||||
4549 | |||||||
4550 | // Add the list initialization step with the built init list. | ||||||
4551 | Sequence.AddListInitializationStep(DestType); | ||||||
4552 | } | ||||||
4553 | |||||||
4554 | /// Try a reference initialization that involves calling a conversion | ||||||
4555 | /// function. | ||||||
4556 | static OverloadingResult TryRefInitWithConversionFunction( | ||||||
4557 | Sema &S, const InitializedEntity &Entity, const InitializationKind &Kind, | ||||||
4558 | Expr *Initializer, bool AllowRValues, bool IsLValueRef, | ||||||
4559 | InitializationSequence &Sequence) { | ||||||
4560 | QualType DestType = Entity.getType(); | ||||||
4561 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||||
4562 | QualType T1 = cv1T1.getUnqualifiedType(); | ||||||
4563 | QualType cv2T2 = Initializer->getType(); | ||||||
4564 | QualType T2 = cv2T2.getUnqualifiedType(); | ||||||
4565 | |||||||
4566 | assert(!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) &&(static_cast <bool> (!S.CompareReferenceRelationship(Initializer ->getBeginLoc(), T1, T2) && "Must have incompatible references when binding via conversion" ) ? void (0) : __assert_fail ("!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) && \"Must have incompatible references when binding via conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4567, __extension__ __PRETTY_FUNCTION__)) | ||||||
4567 | "Must have incompatible references when binding via conversion")(static_cast <bool> (!S.CompareReferenceRelationship(Initializer ->getBeginLoc(), T1, T2) && "Must have incompatible references when binding via conversion" ) ? void (0) : __assert_fail ("!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) && \"Must have incompatible references when binding via conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4567, __extension__ __PRETTY_FUNCTION__)); | ||||||
4568 | |||||||
4569 | // Build the candidate set directly in the initialization sequence | ||||||
4570 | // structure, so that it will persist if we fail. | ||||||
4571 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||||
4572 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByUserDefinedConversion); | ||||||
4573 | |||||||
4574 | // Determine whether we are allowed to call explicit conversion operators. | ||||||
4575 | // Note that none of [over.match.copy], [over.match.conv], nor | ||||||
4576 | // [over.match.ref] permit an explicit constructor to be chosen when | ||||||
4577 | // initializing a reference, not even for direct-initialization. | ||||||
4578 | bool AllowExplicitCtors = false; | ||||||
4579 | bool AllowExplicitConvs = Kind.allowExplicitConversionFunctionsInRefBinding(); | ||||||
4580 | |||||||
4581 | const RecordType *T1RecordType = nullptr; | ||||||
4582 | if (AllowRValues && (T1RecordType = T1->getAs<RecordType>()) && | ||||||
4583 | S.isCompleteType(Kind.getLocation(), T1)) { | ||||||
4584 | // The type we're converting to is a class type. Enumerate its constructors | ||||||
4585 | // to see if there is a suitable conversion. | ||||||
4586 | CXXRecordDecl *T1RecordDecl = cast<CXXRecordDecl>(T1RecordType->getDecl()); | ||||||
4587 | |||||||
4588 | for (NamedDecl *D : S.LookupConstructors(T1RecordDecl)) { | ||||||
4589 | auto Info = getConstructorInfo(D); | ||||||
4590 | if (!Info.Constructor) | ||||||
4591 | continue; | ||||||
4592 | |||||||
4593 | if (!Info.Constructor->isInvalidDecl() && | ||||||
4594 | Info.Constructor->isConvertingConstructor(/*AllowExplicit*/true)) { | ||||||
4595 | if (Info.ConstructorTmpl) | ||||||
4596 | S.AddTemplateOverloadCandidate( | ||||||
4597 | Info.ConstructorTmpl, Info.FoundDecl, | ||||||
4598 | /*ExplicitArgs*/ nullptr, Initializer, CandidateSet, | ||||||
4599 | /*SuppressUserConversions=*/true, | ||||||
4600 | /*PartialOverloading*/ false, AllowExplicitCtors); | ||||||
4601 | else | ||||||
4602 | S.AddOverloadCandidate( | ||||||
4603 | Info.Constructor, Info.FoundDecl, Initializer, CandidateSet, | ||||||
4604 | /*SuppressUserConversions=*/true, | ||||||
4605 | /*PartialOverloading*/ false, AllowExplicitCtors); | ||||||
4606 | } | ||||||
4607 | } | ||||||
4608 | } | ||||||
4609 | if (T1RecordType && T1RecordType->getDecl()->isInvalidDecl()) | ||||||
4610 | return OR_No_Viable_Function; | ||||||
4611 | |||||||
4612 | const RecordType *T2RecordType = nullptr; | ||||||
4613 | if ((T2RecordType = T2->getAs<RecordType>()) && | ||||||
4614 | S.isCompleteType(Kind.getLocation(), T2)) { | ||||||
4615 | // The type we're converting from is a class type, enumerate its conversion | ||||||
4616 | // functions. | ||||||
4617 | CXXRecordDecl *T2RecordDecl = cast<CXXRecordDecl>(T2RecordType->getDecl()); | ||||||
4618 | |||||||
4619 | const auto &Conversions = T2RecordDecl->getVisibleConversionFunctions(); | ||||||
4620 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||||
4621 | NamedDecl *D = *I; | ||||||
4622 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||||
4623 | if (isa<UsingShadowDecl>(D)) | ||||||
4624 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | ||||||
4625 | |||||||
4626 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||||
4627 | CXXConversionDecl *Conv; | ||||||
4628 | if (ConvTemplate) | ||||||
4629 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||||
4630 | else | ||||||
4631 | Conv = cast<CXXConversionDecl>(D); | ||||||
4632 | |||||||
4633 | // If the conversion function doesn't return a reference type, | ||||||
4634 | // it can't be considered for this conversion unless we're allowed to | ||||||
4635 | // consider rvalues. | ||||||
4636 | // FIXME: Do we need to make sure that we only consider conversion | ||||||
4637 | // candidates with reference-compatible results? That might be needed to | ||||||
4638 | // break recursion. | ||||||
4639 | if ((AllowRValues || | ||||||
4640 | Conv->getConversionType()->isLValueReferenceType())) { | ||||||
4641 | if (ConvTemplate) | ||||||
4642 | S.AddTemplateConversionCandidate( | ||||||
4643 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||||
4644 | CandidateSet, | ||||||
4645 | /*AllowObjCConversionOnExplicit=*/false, AllowExplicitConvs); | ||||||
4646 | else | ||||||
4647 | S.AddConversionCandidate( | ||||||
4648 | Conv, I.getPair(), ActingDC, Initializer, DestType, CandidateSet, | ||||||
4649 | /*AllowObjCConversionOnExplicit=*/false, AllowExplicitConvs); | ||||||
4650 | } | ||||||
4651 | } | ||||||
4652 | } | ||||||
4653 | if (T2RecordType && T2RecordType->getDecl()->isInvalidDecl()) | ||||||
4654 | return OR_No_Viable_Function; | ||||||
4655 | |||||||
4656 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||||
4657 | |||||||
4658 | // Perform overload resolution. If it fails, return the failed result. | ||||||
4659 | OverloadCandidateSet::iterator Best; | ||||||
4660 | if (OverloadingResult Result | ||||||
4661 | = CandidateSet.BestViableFunction(S, DeclLoc, Best)) | ||||||
4662 | return Result; | ||||||
4663 | |||||||
4664 | FunctionDecl *Function = Best->Function; | ||||||
4665 | // This is the overload that will be used for this initialization step if we | ||||||
4666 | // use this initialization. Mark it as referenced. | ||||||
4667 | Function->setReferenced(); | ||||||
4668 | |||||||
4669 | // Compute the returned type and value kind of the conversion. | ||||||
4670 | QualType cv3T3; | ||||||
4671 | if (isa<CXXConversionDecl>(Function)) | ||||||
4672 | cv3T3 = Function->getReturnType(); | ||||||
4673 | else | ||||||
4674 | cv3T3 = T1; | ||||||
4675 | |||||||
4676 | ExprValueKind VK = VK_PRValue; | ||||||
4677 | if (cv3T3->isLValueReferenceType()) | ||||||
4678 | VK = VK_LValue; | ||||||
4679 | else if (const auto *RRef = cv3T3->getAs<RValueReferenceType>()) | ||||||
4680 | VK = RRef->getPointeeType()->isFunctionType() ? VK_LValue : VK_XValue; | ||||||
4681 | cv3T3 = cv3T3.getNonLValueExprType(S.Context); | ||||||
4682 | |||||||
4683 | // Add the user-defined conversion step. | ||||||
4684 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||||
4685 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, cv3T3, | ||||||
4686 | HadMultipleCandidates); | ||||||
4687 | |||||||
4688 | // Determine whether we'll need to perform derived-to-base adjustments or | ||||||
4689 | // other conversions. | ||||||
4690 | Sema::ReferenceConversions RefConv; | ||||||
4691 | Sema::ReferenceCompareResult NewRefRelationship = | ||||||
4692 | S.CompareReferenceRelationship(DeclLoc, T1, cv3T3, &RefConv); | ||||||
4693 | |||||||
4694 | // Add the final conversion sequence, if necessary. | ||||||
4695 | if (NewRefRelationship == Sema::Ref_Incompatible) { | ||||||
4696 | assert(!isa<CXXConstructorDecl>(Function) &&(static_cast <bool> (!isa<CXXConstructorDecl>(Function ) && "should not have conversion after constructor") ? void (0) : __assert_fail ("!isa<CXXConstructorDecl>(Function) && \"should not have conversion after constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4697, __extension__ __PRETTY_FUNCTION__)) | ||||||
4697 | "should not have conversion after constructor")(static_cast <bool> (!isa<CXXConstructorDecl>(Function ) && "should not have conversion after constructor") ? void (0) : __assert_fail ("!isa<CXXConstructorDecl>(Function) && \"should not have conversion after constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4697, __extension__ __PRETTY_FUNCTION__)); | ||||||
4698 | |||||||
4699 | ImplicitConversionSequence ICS; | ||||||
4700 | ICS.setStandard(); | ||||||
4701 | ICS.Standard = Best->FinalConversion; | ||||||
4702 | Sequence.AddConversionSequenceStep(ICS, ICS.Standard.getToType(2)); | ||||||
4703 | |||||||
4704 | // Every implicit conversion results in a prvalue, except for a glvalue | ||||||
4705 | // derived-to-base conversion, which we handle below. | ||||||
4706 | cv3T3 = ICS.Standard.getToType(2); | ||||||
4707 | VK = VK_PRValue; | ||||||
4708 | } | ||||||
4709 | |||||||
4710 | // If the converted initializer is a prvalue, its type T4 is adjusted to | ||||||
4711 | // type "cv1 T4" and the temporary materialization conversion is applied. | ||||||
4712 | // | ||||||
4713 | // We adjust the cv-qualifications to match the reference regardless of | ||||||
4714 | // whether we have a prvalue so that the AST records the change. In this | ||||||
4715 | // case, T4 is "cv3 T3". | ||||||
4716 | QualType cv1T4 = S.Context.getQualifiedType(cv3T3, cv1T1.getQualifiers()); | ||||||
4717 | if (cv1T4.getQualifiers() != cv3T3.getQualifiers()) | ||||||
4718 | Sequence.AddQualificationConversionStep(cv1T4, VK); | ||||||
4719 | Sequence.AddReferenceBindingStep(cv1T4, VK == VK_PRValue); | ||||||
4720 | VK = IsLValueRef ? VK_LValue : VK_XValue; | ||||||
4721 | |||||||
4722 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||||
4723 | Sequence.AddDerivedToBaseCastStep(cv1T1, VK); | ||||||
4724 | else if (RefConv & Sema::ReferenceConversions::ObjC) | ||||||
4725 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||||
4726 | else if (RefConv & Sema::ReferenceConversions::Function) | ||||||
4727 | Sequence.AddFunctionReferenceConversionStep(cv1T1); | ||||||
4728 | else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||||
4729 | if (!S.Context.hasSameType(cv1T4, cv1T1)) | ||||||
4730 | Sequence.AddQualificationConversionStep(cv1T1, VK); | ||||||
4731 | } | ||||||
4732 | |||||||
4733 | return OR_Success; | ||||||
4734 | } | ||||||
4735 | |||||||
4736 | static void CheckCXX98CompatAccessibleCopy(Sema &S, | ||||||
4737 | const InitializedEntity &Entity, | ||||||
4738 | Expr *CurInitExpr); | ||||||
4739 | |||||||
4740 | /// Attempt reference initialization (C++0x [dcl.init.ref]) | ||||||
4741 | static void TryReferenceInitialization(Sema &S, | ||||||
4742 | const InitializedEntity &Entity, | ||||||
4743 | const InitializationKind &Kind, | ||||||
4744 | Expr *Initializer, | ||||||
4745 | InitializationSequence &Sequence) { | ||||||
4746 | QualType DestType = Entity.getType(); | ||||||
4747 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||||
4748 | Qualifiers T1Quals; | ||||||
4749 | QualType T1 = S.Context.getUnqualifiedArrayType(cv1T1, T1Quals); | ||||||
4750 | QualType cv2T2 = S.getCompletedType(Initializer); | ||||||
4751 | Qualifiers T2Quals; | ||||||
4752 | QualType T2 = S.Context.getUnqualifiedArrayType(cv2T2, T2Quals); | ||||||
4753 | |||||||
4754 | // If the initializer is the address of an overloaded function, try | ||||||
4755 | // to resolve the overloaded function. If all goes well, T2 is the | ||||||
4756 | // type of the resulting function. | ||||||
4757 | if (ResolveOverloadedFunctionForReferenceBinding(S, Initializer, cv2T2, T2, | ||||||
4758 | T1, Sequence)) | ||||||
4759 | return; | ||||||
4760 | |||||||
4761 | // Delegate everything else to a subfunction. | ||||||
4762 | TryReferenceInitializationCore(S, Entity, Kind, Initializer, cv1T1, T1, | ||||||
4763 | T1Quals, cv2T2, T2, T2Quals, Sequence); | ||||||
4764 | } | ||||||
4765 | |||||||
4766 | /// Determine whether an expression is a non-referenceable glvalue (one to | ||||||
4767 | /// which a reference can never bind). Attempting to bind a reference to | ||||||
4768 | /// such a glvalue will always create a temporary. | ||||||
4769 | static bool isNonReferenceableGLValue(Expr *E) { | ||||||
4770 | return E->refersToBitField() || E->refersToVectorElement() || | ||||||
4771 | E->refersToMatrixElement(); | ||||||
4772 | } | ||||||
4773 | |||||||
4774 | /// Reference initialization without resolving overloaded functions. | ||||||
4775 | /// | ||||||
4776 | /// We also can get here in C if we call a builtin which is declared as | ||||||
4777 | /// a function with a parameter of reference type (such as __builtin_va_end()). | ||||||
4778 | static void TryReferenceInitializationCore(Sema &S, | ||||||
4779 | const InitializedEntity &Entity, | ||||||
4780 | const InitializationKind &Kind, | ||||||
4781 | Expr *Initializer, | ||||||
4782 | QualType cv1T1, QualType T1, | ||||||
4783 | Qualifiers T1Quals, | ||||||
4784 | QualType cv2T2, QualType T2, | ||||||
4785 | Qualifiers T2Quals, | ||||||
4786 | InitializationSequence &Sequence) { | ||||||
4787 | QualType DestType = Entity.getType(); | ||||||
4788 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||||
4789 | |||||||
4790 | // Compute some basic properties of the types and the initializer. | ||||||
4791 | bool isLValueRef = DestType->isLValueReferenceType(); | ||||||
4792 | bool isRValueRef = !isLValueRef; | ||||||
4793 | Expr::Classification InitCategory = Initializer->Classify(S.Context); | ||||||
4794 | |||||||
4795 | Sema::ReferenceConversions RefConv; | ||||||
4796 | Sema::ReferenceCompareResult RefRelationship = | ||||||
4797 | S.CompareReferenceRelationship(DeclLoc, cv1T1, cv2T2, &RefConv); | ||||||
4798 | |||||||
4799 | // C++0x [dcl.init.ref]p5: | ||||||
4800 | // A reference to type "cv1 T1" is initialized by an expression of type | ||||||
4801 | // "cv2 T2" as follows: | ||||||
4802 | // | ||||||
4803 | // - If the reference is an lvalue reference and the initializer | ||||||
4804 | // expression | ||||||
4805 | // Note the analogous bullet points for rvalue refs to functions. Because | ||||||
4806 | // there are no function rvalues in C++, rvalue refs to functions are treated | ||||||
4807 | // like lvalue refs. | ||||||
4808 | OverloadingResult ConvOvlResult = OR_Success; | ||||||
4809 | bool T1Function = T1->isFunctionType(); | ||||||
4810 | if (isLValueRef || T1Function) { | ||||||
4811 | if (InitCategory.isLValue() && !isNonReferenceableGLValue(Initializer) && | ||||||
4812 | (RefRelationship == Sema::Ref_Compatible || | ||||||
4813 | (Kind.isCStyleOrFunctionalCast() && | ||||||
4814 | RefRelationship == Sema::Ref_Related))) { | ||||||
4815 | // - is an lvalue (but is not a bit-field), and "cv1 T1" is | ||||||
4816 | // reference-compatible with "cv2 T2," or | ||||||
4817 | if (RefConv & (Sema::ReferenceConversions::DerivedToBase | | ||||||
4818 | Sema::ReferenceConversions::ObjC)) { | ||||||
4819 | // If we're converting the pointee, add any qualifiers first; | ||||||
4820 | // these qualifiers must all be top-level, so just convert to "cv1 T2". | ||||||
4821 | if (RefConv & (Sema::ReferenceConversions::Qualification)) | ||||||
4822 | Sequence.AddQualificationConversionStep( | ||||||
4823 | S.Context.getQualifiedType(T2, T1Quals), | ||||||
4824 | Initializer->getValueKind()); | ||||||
4825 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||||
4826 | Sequence.AddDerivedToBaseCastStep(cv1T1, VK_LValue); | ||||||
4827 | else | ||||||
4828 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||||
4829 | } else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||||
4830 | // Perform a (possibly multi-level) qualification conversion. | ||||||
4831 | Sequence.AddQualificationConversionStep(cv1T1, | ||||||
4832 | Initializer->getValueKind()); | ||||||
4833 | } else if (RefConv & Sema::ReferenceConversions::Function) { | ||||||
4834 | Sequence.AddFunctionReferenceConversionStep(cv1T1); | ||||||
4835 | } | ||||||
4836 | |||||||
4837 | // We only create a temporary here when binding a reference to a | ||||||
4838 | // bit-field or vector element. Those cases are't supposed to be | ||||||
4839 | // handled by this bullet, but the outcome is the same either way. | ||||||
4840 | Sequence.AddReferenceBindingStep(cv1T1, false); | ||||||
4841 | return; | ||||||
4842 | } | ||||||
4843 | |||||||
4844 | // - has a class type (i.e., T2 is a class type), where T1 is not | ||||||
4845 | // reference-related to T2, and can be implicitly converted to an | ||||||
4846 | // lvalue of type "cv3 T3," where "cv1 T1" is reference-compatible | ||||||
4847 | // with "cv3 T3" (this conversion is selected by enumerating the | ||||||
4848 | // applicable conversion functions (13.3.1.6) and choosing the best | ||||||
4849 | // one through overload resolution (13.3)), | ||||||
4850 | // If we have an rvalue ref to function type here, the rhs must be | ||||||
4851 | // an rvalue. DR1287 removed the "implicitly" here. | ||||||
4852 | if (RefRelationship == Sema::Ref_Incompatible && T2->isRecordType() && | ||||||
4853 | (isLValueRef || InitCategory.isRValue())) { | ||||||
4854 | if (S.getLangOpts().CPlusPlus) { | ||||||
4855 | // Try conversion functions only for C++. | ||||||
4856 | ConvOvlResult = TryRefInitWithConversionFunction( | ||||||
4857 | S, Entity, Kind, Initializer, /*AllowRValues*/ isRValueRef, | ||||||
4858 | /*IsLValueRef*/ isLValueRef, Sequence); | ||||||
4859 | if (ConvOvlResult == OR_Success) | ||||||
4860 | return; | ||||||
4861 | if (ConvOvlResult != OR_No_Viable_Function) | ||||||
4862 | Sequence.SetOverloadFailure( | ||||||
4863 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||||
4864 | ConvOvlResult); | ||||||
4865 | } else { | ||||||
4866 | ConvOvlResult = OR_No_Viable_Function; | ||||||
4867 | } | ||||||
4868 | } | ||||||
4869 | } | ||||||
4870 | |||||||
4871 | // - Otherwise, the reference shall be an lvalue reference to a | ||||||
4872 | // non-volatile const type (i.e., cv1 shall be const), or the reference | ||||||
4873 | // shall be an rvalue reference. | ||||||
4874 | // For address spaces, we interpret this to mean that an addr space | ||||||
4875 | // of a reference "cv1 T1" is a superset of addr space of "cv2 T2". | ||||||
4876 | if (isLValueRef && !(T1Quals.hasConst() && !T1Quals.hasVolatile() && | ||||||
4877 | T1Quals.isAddressSpaceSupersetOf(T2Quals))) { | ||||||
4878 | if (S.Context.getCanonicalType(T2) == S.Context.OverloadTy) | ||||||
4879 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||||
4880 | else if (ConvOvlResult && !Sequence.getFailedCandidateSet().empty()) | ||||||
4881 | Sequence.SetOverloadFailure( | ||||||
4882 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||||
4883 | ConvOvlResult); | ||||||
4884 | else if (!InitCategory.isLValue()) | ||||||
4885 | Sequence.SetFailed( | ||||||
4886 | T1Quals.isAddressSpaceSupersetOf(T2Quals) | ||||||
4887 | ? InitializationSequence:: | ||||||
4888 | FK_NonConstLValueReferenceBindingToTemporary | ||||||
4889 | : InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||||
4890 | else { | ||||||
4891 | InitializationSequence::FailureKind FK; | ||||||
4892 | switch (RefRelationship) { | ||||||
4893 | case Sema::Ref_Compatible: | ||||||
4894 | if (Initializer->refersToBitField()) | ||||||
4895 | FK = InitializationSequence:: | ||||||
4896 | FK_NonConstLValueReferenceBindingToBitfield; | ||||||
4897 | else if (Initializer->refersToVectorElement()) | ||||||
4898 | FK = InitializationSequence:: | ||||||
4899 | FK_NonConstLValueReferenceBindingToVectorElement; | ||||||
4900 | else if (Initializer->refersToMatrixElement()) | ||||||
4901 | FK = InitializationSequence:: | ||||||
4902 | FK_NonConstLValueReferenceBindingToMatrixElement; | ||||||
4903 | else | ||||||
4904 | llvm_unreachable("unexpected kind of compatible initializer")::llvm::llvm_unreachable_internal("unexpected kind of compatible initializer" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4904); | ||||||
4905 | break; | ||||||
4906 | case Sema::Ref_Related: | ||||||
4907 | FK = InitializationSequence::FK_ReferenceInitDropsQualifiers; | ||||||
4908 | break; | ||||||
4909 | case Sema::Ref_Incompatible: | ||||||
4910 | FK = InitializationSequence:: | ||||||
4911 | FK_NonConstLValueReferenceBindingToUnrelated; | ||||||
4912 | break; | ||||||
4913 | } | ||||||
4914 | Sequence.SetFailed(FK); | ||||||
4915 | } | ||||||
4916 | return; | ||||||
4917 | } | ||||||
4918 | |||||||
4919 | // - If the initializer expression | ||||||
4920 | // - is an | ||||||
4921 | // [<=14] xvalue (but not a bit-field), class prvalue, array prvalue, or | ||||||
4922 | // [1z] rvalue (but not a bit-field) or | ||||||
4923 | // function lvalue and "cv1 T1" is reference-compatible with "cv2 T2" | ||||||
4924 | // | ||||||
4925 | // Note: functions are handled above and below rather than here... | ||||||
4926 | if (!T1Function && | ||||||
4927 | (RefRelationship == Sema::Ref_Compatible || | ||||||
4928 | (Kind.isCStyleOrFunctionalCast() && | ||||||
4929 | RefRelationship == Sema::Ref_Related)) && | ||||||
4930 | ((InitCategory.isXValue() && !isNonReferenceableGLValue(Initializer)) || | ||||||
4931 | (InitCategory.isPRValue() && | ||||||
4932 | (S.getLangOpts().CPlusPlus17 || T2->isRecordType() || | ||||||
4933 | T2->isArrayType())))) { | ||||||
4934 | ExprValueKind ValueKind = InitCategory.isXValue() ? VK_XValue : VK_PRValue; | ||||||
4935 | if (InitCategory.isPRValue() && T2->isRecordType()) { | ||||||
4936 | // The corresponding bullet in C++03 [dcl.init.ref]p5 gives the | ||||||
4937 | // compiler the freedom to perform a copy here or bind to the | ||||||
4938 | // object, while C++0x requires that we bind directly to the | ||||||
4939 | // object. Hence, we always bind to the object without making an | ||||||
4940 | // extra copy. However, in C++03 requires that we check for the | ||||||
4941 | // presence of a suitable copy constructor: | ||||||
4942 | // | ||||||
4943 | // The constructor that would be used to make the copy shall | ||||||
4944 | // be callable whether or not the copy is actually done. | ||||||
4945 | if (!S.getLangOpts().CPlusPlus11 && !S.getLangOpts().MicrosoftExt) | ||||||
4946 | Sequence.AddExtraneousCopyToTemporary(cv2T2); | ||||||
4947 | else if (S.getLangOpts().CPlusPlus11) | ||||||
4948 | CheckCXX98CompatAccessibleCopy(S, Entity, Initializer); | ||||||
4949 | } | ||||||
4950 | |||||||
4951 | // C++1z [dcl.init.ref]/5.2.1.2: | ||||||
4952 | // If the converted initializer is a prvalue, its type T4 is adjusted | ||||||
4953 | // to type "cv1 T4" and the temporary materialization conversion is | ||||||
4954 | // applied. | ||||||
4955 | // Postpone address space conversions to after the temporary materialization | ||||||
4956 | // conversion to allow creating temporaries in the alloca address space. | ||||||
4957 | auto T1QualsIgnoreAS = T1Quals; | ||||||
4958 | auto T2QualsIgnoreAS = T2Quals; | ||||||
4959 | if (T1Quals.getAddressSpace() != T2Quals.getAddressSpace()) { | ||||||
4960 | T1QualsIgnoreAS.removeAddressSpace(); | ||||||
4961 | T2QualsIgnoreAS.removeAddressSpace(); | ||||||
4962 | } | ||||||
4963 | QualType cv1T4 = S.Context.getQualifiedType(cv2T2, T1QualsIgnoreAS); | ||||||
4964 | if (T1QualsIgnoreAS != T2QualsIgnoreAS) | ||||||
4965 | Sequence.AddQualificationConversionStep(cv1T4, ValueKind); | ||||||
4966 | Sequence.AddReferenceBindingStep(cv1T4, ValueKind == VK_PRValue); | ||||||
4967 | ValueKind = isLValueRef ? VK_LValue : VK_XValue; | ||||||
4968 | // Add addr space conversion if required. | ||||||
4969 | if (T1Quals.getAddressSpace() != T2Quals.getAddressSpace()) { | ||||||
4970 | auto T4Quals = cv1T4.getQualifiers(); | ||||||
4971 | T4Quals.addAddressSpace(T1Quals.getAddressSpace()); | ||||||
4972 | QualType cv1T4WithAS = S.Context.getQualifiedType(T2, T4Quals); | ||||||
4973 | Sequence.AddQualificationConversionStep(cv1T4WithAS, ValueKind); | ||||||
4974 | cv1T4 = cv1T4WithAS; | ||||||
4975 | } | ||||||
4976 | |||||||
4977 | // In any case, the reference is bound to the resulting glvalue (or to | ||||||
4978 | // an appropriate base class subobject). | ||||||
4979 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||||
4980 | Sequence.AddDerivedToBaseCastStep(cv1T1, ValueKind); | ||||||
4981 | else if (RefConv & Sema::ReferenceConversions::ObjC) | ||||||
4982 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||||
4983 | else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||||
4984 | if (!S.Context.hasSameType(cv1T4, cv1T1)) | ||||||
4985 | Sequence.AddQualificationConversionStep(cv1T1, ValueKind); | ||||||
4986 | } | ||||||
4987 | return; | ||||||
4988 | } | ||||||
4989 | |||||||
4990 | // - has a class type (i.e., T2 is a class type), where T1 is not | ||||||
4991 | // reference-related to T2, and can be implicitly converted to an | ||||||
4992 | // xvalue, class prvalue, or function lvalue of type "cv3 T3", | ||||||
4993 | // where "cv1 T1" is reference-compatible with "cv3 T3", | ||||||
4994 | // | ||||||
4995 | // DR1287 removes the "implicitly" here. | ||||||
4996 | if (T2->isRecordType()) { | ||||||
4997 | if (RefRelationship == Sema::Ref_Incompatible) { | ||||||
4998 | ConvOvlResult = TryRefInitWithConversionFunction( | ||||||
4999 | S, Entity, Kind, Initializer, /*AllowRValues*/ true, | ||||||
5000 | /*IsLValueRef*/ isLValueRef, Sequence); | ||||||
5001 | if (ConvOvlResult) | ||||||
5002 | Sequence.SetOverloadFailure( | ||||||
5003 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||||
5004 | ConvOvlResult); | ||||||
5005 | |||||||
5006 | return; | ||||||
5007 | } | ||||||
5008 | |||||||
5009 | if (RefRelationship == Sema::Ref_Compatible && | ||||||
5010 | isRValueRef && InitCategory.isLValue()) { | ||||||
5011 | Sequence.SetFailed( | ||||||
5012 | InitializationSequence::FK_RValueReferenceBindingToLValue); | ||||||
5013 | return; | ||||||
5014 | } | ||||||
5015 | |||||||
5016 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||||
5017 | return; | ||||||
5018 | } | ||||||
5019 | |||||||
5020 | // - Otherwise, a temporary of type "cv1 T1" is created and initialized | ||||||
5021 | // from the initializer expression using the rules for a non-reference | ||||||
5022 | // copy-initialization (8.5). The reference is then bound to the | ||||||
5023 | // temporary. [...] | ||||||
5024 | |||||||
5025 | // Ignore address space of reference type at this point and perform address | ||||||
5026 | // space conversion after the reference binding step. | ||||||
5027 | QualType cv1T1IgnoreAS = | ||||||
5028 | T1Quals.hasAddressSpace() | ||||||
5029 | ? S.Context.getQualifiedType(T1, T1Quals.withoutAddressSpace()) | ||||||
5030 | : cv1T1; | ||||||
5031 | |||||||
5032 | InitializedEntity TempEntity = | ||||||
5033 | InitializedEntity::InitializeTemporary(cv1T1IgnoreAS); | ||||||
5034 | |||||||
5035 | // FIXME: Why do we use an implicit conversion here rather than trying | ||||||
5036 | // copy-initialization? | ||||||
5037 | ImplicitConversionSequence ICS | ||||||
5038 | = S.TryImplicitConversion(Initializer, TempEntity.getType(), | ||||||
5039 | /*SuppressUserConversions=*/false, | ||||||
5040 | Sema::AllowedExplicit::None, | ||||||
5041 | /*FIXME:InOverloadResolution=*/false, | ||||||
5042 | /*CStyle=*/Kind.isCStyleOrFunctionalCast(), | ||||||
5043 | /*AllowObjCWritebackConversion=*/false); | ||||||
5044 | |||||||
5045 | if (ICS.isBad()) { | ||||||
5046 | // FIXME: Use the conversion function set stored in ICS to turn | ||||||
5047 | // this into an overloading ambiguity diagnostic. However, we need | ||||||
5048 | // to keep that set as an OverloadCandidateSet rather than as some | ||||||
5049 | // other kind of set. | ||||||
5050 | if (ConvOvlResult && !Sequence.getFailedCandidateSet().empty()) | ||||||
5051 | Sequence.SetOverloadFailure( | ||||||
5052 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||||
5053 | ConvOvlResult); | ||||||
5054 | else if (S.Context.getCanonicalType(T2) == S.Context.OverloadTy) | ||||||
5055 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||||
5056 | else | ||||||
5057 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitFailed); | ||||||
5058 | return; | ||||||
5059 | } else { | ||||||
5060 | Sequence.AddConversionSequenceStep(ICS, TempEntity.getType()); | ||||||
5061 | } | ||||||
5062 | |||||||
5063 | // [...] If T1 is reference-related to T2, cv1 must be the | ||||||
5064 | // same cv-qualification as, or greater cv-qualification | ||||||
5065 | // than, cv2; otherwise, the program is ill-formed. | ||||||
5066 | unsigned T1CVRQuals = T1Quals.getCVRQualifiers(); | ||||||
5067 | unsigned T2CVRQuals = T2Quals.getCVRQualifiers(); | ||||||
5068 | if (RefRelationship == Sema::Ref_Related && | ||||||
5069 | ((T1CVRQuals | T2CVRQuals) != T1CVRQuals || | ||||||
5070 | !T1Quals.isAddressSpaceSupersetOf(T2Quals))) { | ||||||
5071 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||||
5072 | return; | ||||||
5073 | } | ||||||
5074 | |||||||
5075 | // [...] If T1 is reference-related to T2 and the reference is an rvalue | ||||||
5076 | // reference, the initializer expression shall not be an lvalue. | ||||||
5077 | if (RefRelationship >= Sema::Ref_Related && !isLValueRef && | ||||||
5078 | InitCategory.isLValue()) { | ||||||
5079 | Sequence.SetFailed( | ||||||
5080 | InitializationSequence::FK_RValueReferenceBindingToLValue); | ||||||
5081 | return; | ||||||
5082 | } | ||||||
5083 | |||||||
5084 | Sequence.AddReferenceBindingStep(cv1T1IgnoreAS, /*BindingTemporary=*/true); | ||||||
5085 | |||||||
5086 | if (T1Quals.hasAddressSpace()) { | ||||||
5087 | if (!Qualifiers::isAddressSpaceSupersetOf(T1Quals.getAddressSpace(), | ||||||
5088 | LangAS::Default)) { | ||||||
5089 | Sequence.SetFailed( | ||||||
5090 | InitializationSequence::FK_ReferenceAddrspaceMismatchTemporary); | ||||||
5091 | return; | ||||||
5092 | } | ||||||
5093 | Sequence.AddQualificationConversionStep(cv1T1, isLValueRef ? VK_LValue | ||||||
5094 | : VK_XValue); | ||||||
5095 | } | ||||||
5096 | } | ||||||
5097 | |||||||
5098 | /// Attempt character array initialization from a string literal | ||||||
5099 | /// (C++ [dcl.init.string], C99 6.7.8). | ||||||
5100 | static void TryStringLiteralInitialization(Sema &S, | ||||||
5101 | const InitializedEntity &Entity, | ||||||
5102 | const InitializationKind &Kind, | ||||||
5103 | Expr *Initializer, | ||||||
5104 | InitializationSequence &Sequence) { | ||||||
5105 | Sequence.AddStringInitStep(Entity.getType()); | ||||||
5106 | } | ||||||
5107 | |||||||
5108 | /// Attempt value initialization (C++ [dcl.init]p7). | ||||||
5109 | static void TryValueInitialization(Sema &S, | ||||||
5110 | const InitializedEntity &Entity, | ||||||
5111 | const InitializationKind &Kind, | ||||||
5112 | InitializationSequence &Sequence, | ||||||
5113 | InitListExpr *InitList) { | ||||||
5114 | assert((!InitList || InitList->getNumInits() == 0) &&(static_cast <bool> ((!InitList || InitList->getNumInits () == 0) && "Shouldn't use value-init for non-empty init lists" ) ? void (0) : __assert_fail ("(!InitList || InitList->getNumInits() == 0) && \"Shouldn't use value-init for non-empty init lists\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5115, __extension__ __PRETTY_FUNCTION__)) | ||||||
5115 | "Shouldn't use value-init for non-empty init lists")(static_cast <bool> ((!InitList || InitList->getNumInits () == 0) && "Shouldn't use value-init for non-empty init lists" ) ? void (0) : __assert_fail ("(!InitList || InitList->getNumInits() == 0) && \"Shouldn't use value-init for non-empty init lists\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5115, __extension__ __PRETTY_FUNCTION__)); | ||||||
5116 | |||||||
5117 | // C++98 [dcl.init]p5, C++11 [dcl.init]p7: | ||||||
5118 | // | ||||||
5119 | // To value-initialize an object of type T means: | ||||||
5120 | QualType T = Entity.getType(); | ||||||
5121 | |||||||
5122 | // -- if T is an array type, then each element is value-initialized; | ||||||
5123 | T = S.Context.getBaseElementType(T); | ||||||
5124 | |||||||
5125 | if (const RecordType *RT = T->getAs<RecordType>()) { | ||||||
5126 | if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) { | ||||||
5127 | bool NeedZeroInitialization = true; | ||||||
5128 | // C++98: | ||||||
5129 | // -- if T is a class type (clause 9) with a user-declared constructor | ||||||
5130 | // (12.1), then the default constructor for T is called (and the | ||||||
5131 | // initialization is ill-formed if T has no accessible default | ||||||
5132 | // constructor); | ||||||
5133 | // C++11: | ||||||
5134 | // -- if T is a class type (clause 9) with either no default constructor | ||||||
5135 | // (12.1 [class.ctor]) or a default constructor that is user-provided | ||||||
5136 | // or deleted, then the object is default-initialized; | ||||||
5137 | // | ||||||
5138 | // Note that the C++11 rule is the same as the C++98 rule if there are no | ||||||
5139 | // defaulted or deleted constructors, so we just use it unconditionally. | ||||||
5140 | CXXConstructorDecl *CD = S.LookupDefaultConstructor(ClassDecl); | ||||||
5141 | if (!CD || !CD->getCanonicalDecl()->isDefaulted() || CD->isDeleted()) | ||||||
5142 | NeedZeroInitialization = false; | ||||||
5143 | |||||||
5144 | // -- if T is a (possibly cv-qualified) non-union class type without a | ||||||
5145 | // user-provided or deleted default constructor, then the object is | ||||||
5146 | // zero-initialized and, if T has a non-trivial default constructor, | ||||||
5147 | // default-initialized; | ||||||
5148 | // The 'non-union' here was removed by DR1502. The 'non-trivial default | ||||||
5149 | // constructor' part was removed by DR1507. | ||||||
5150 | if (NeedZeroInitialization) | ||||||
5151 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||||
5152 | |||||||
5153 | // C++03: | ||||||
5154 | // -- if T is a non-union class type without a user-declared constructor, | ||||||
5155 | // then every non-static data member and base class component of T is | ||||||
5156 | // value-initialized; | ||||||
5157 | // [...] A program that calls for [...] value-initialization of an | ||||||
5158 | // entity of reference type is ill-formed. | ||||||
5159 | // | ||||||
5160 | // C++11 doesn't need this handling, because value-initialization does not | ||||||
5161 | // occur recursively there, and the implicit default constructor is | ||||||
5162 | // defined as deleted in the problematic cases. | ||||||
5163 | if (!S.getLangOpts().CPlusPlus11 && | ||||||
5164 | ClassDecl->hasUninitializedReferenceMember()) { | ||||||
5165 | Sequence.SetFailed(InitializationSequence::FK_TooManyInitsForReference); | ||||||
5166 | return; | ||||||
5167 | } | ||||||
5168 | |||||||
5169 | // If this is list-value-initialization, pass the empty init list on when | ||||||
5170 | // building the constructor call. This affects the semantics of a few | ||||||
5171 | // things (such as whether an explicit default constructor can be called). | ||||||
5172 | Expr *InitListAsExpr = InitList; | ||||||
5173 | MultiExprArg Args(&InitListAsExpr, InitList ? 1 : 0); | ||||||
5174 | bool InitListSyntax = InitList; | ||||||
5175 | |||||||
5176 | // FIXME: Instead of creating a CXXConstructExpr of array type here, | ||||||
5177 | // wrap a class-typed CXXConstructExpr in an ArrayInitLoopExpr. | ||||||
5178 | return TryConstructorInitialization( | ||||||
5179 | S, Entity, Kind, Args, T, Entity.getType(), Sequence, InitListSyntax); | ||||||
5180 | } | ||||||
5181 | } | ||||||
5182 | |||||||
5183 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||||
5184 | } | ||||||
5185 | |||||||
5186 | /// Attempt default initialization (C++ [dcl.init]p6). | ||||||
5187 | static void TryDefaultInitialization(Sema &S, | ||||||
5188 | const InitializedEntity &Entity, | ||||||
5189 | const InitializationKind &Kind, | ||||||
5190 | InitializationSequence &Sequence) { | ||||||
5191 | assert(Kind.getKind() == InitializationKind::IK_Default)(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Default) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Default" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5191, __extension__ __PRETTY_FUNCTION__)); | ||||||
5192 | |||||||
5193 | // C++ [dcl.init]p6: | ||||||
5194 | // To default-initialize an object of type T means: | ||||||
5195 | // - if T is an array type, each element is default-initialized; | ||||||
5196 | QualType DestType = S.Context.getBaseElementType(Entity.getType()); | ||||||
5197 | |||||||
5198 | // - if T is a (possibly cv-qualified) class type (Clause 9), the default | ||||||
5199 | // constructor for T is called (and the initialization is ill-formed if | ||||||
5200 | // T has no accessible default constructor); | ||||||
5201 | if (DestType->isRecordType() && S.getLangOpts().CPlusPlus) { | ||||||
5202 | TryConstructorInitialization(S, Entity, Kind, None, DestType, | ||||||
5203 | Entity.getType(), Sequence); | ||||||
5204 | return; | ||||||
5205 | } | ||||||
5206 | |||||||
5207 | // - otherwise, no initialization is performed. | ||||||
5208 | |||||||
5209 | // If a program calls for the default initialization of an object of | ||||||
5210 | // a const-qualified type T, T shall be a class type with a user-provided | ||||||
5211 | // default constructor. | ||||||
5212 | if (DestType.isConstQualified() && S.getLangOpts().CPlusPlus) { | ||||||
5213 | if (!maybeRecoverWithZeroInitialization(S, Sequence, Entity)) | ||||||
5214 | Sequence.SetFailed(InitializationSequence::FK_DefaultInitOfConst); | ||||||
5215 | return; | ||||||
5216 | } | ||||||
5217 | |||||||
5218 | // If the destination type has a lifetime property, zero-initialize it. | ||||||
5219 | if (DestType.getQualifiers().hasObjCLifetime()) { | ||||||
5220 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||||
5221 | return; | ||||||
5222 | } | ||||||
5223 | } | ||||||
5224 | |||||||
5225 | /// Attempt a user-defined conversion between two types (C++ [dcl.init]), | ||||||
5226 | /// which enumerates all conversion functions and performs overload resolution | ||||||
5227 | /// to select the best. | ||||||
5228 | static void TryUserDefinedConversion(Sema &S, | ||||||
5229 | QualType DestType, | ||||||
5230 | const InitializationKind &Kind, | ||||||
5231 | Expr *Initializer, | ||||||
5232 | InitializationSequence &Sequence, | ||||||
5233 | bool TopLevelOfInitList) { | ||||||
5234 | assert(!DestType->isReferenceType() && "References are handled elsewhere")(static_cast <bool> (!DestType->isReferenceType() && "References are handled elsewhere") ? void (0) : __assert_fail ("!DestType->isReferenceType() && \"References are handled elsewhere\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5234, __extension__ __PRETTY_FUNCTION__)); | ||||||
5235 | QualType SourceType = Initializer->getType(); | ||||||
5236 | assert((DestType->isRecordType() || SourceType->isRecordType()) &&(static_cast <bool> ((DestType->isRecordType() || SourceType ->isRecordType()) && "Must have a class type to perform a user-defined conversion" ) ? void (0) : __assert_fail ("(DestType->isRecordType() || SourceType->isRecordType()) && \"Must have a class type to perform a user-defined conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5237, __extension__ __PRETTY_FUNCTION__)) | ||||||
5237 | "Must have a class type to perform a user-defined conversion")(static_cast <bool> ((DestType->isRecordType() || SourceType ->isRecordType()) && "Must have a class type to perform a user-defined conversion" ) ? void (0) : __assert_fail ("(DestType->isRecordType() || SourceType->isRecordType()) && \"Must have a class type to perform a user-defined conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5237, __extension__ __PRETTY_FUNCTION__)); | ||||||
5238 | |||||||
5239 | // Build the candidate set directly in the initialization sequence | ||||||
5240 | // structure, so that it will persist if we fail. | ||||||
5241 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||||
5242 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByUserDefinedConversion); | ||||||
5243 | CandidateSet.setDestAS(DestType.getQualifiers().getAddressSpace()); | ||||||
5244 | |||||||
5245 | // Determine whether we are allowed to call explicit constructors or | ||||||
5246 | // explicit conversion operators. | ||||||
5247 | bool AllowExplicit = Kind.AllowExplicit(); | ||||||
5248 | |||||||
5249 | if (const RecordType *DestRecordType = DestType->getAs<RecordType>()) { | ||||||
5250 | // The type we're converting to is a class type. Enumerate its constructors | ||||||
5251 | // to see if there is a suitable conversion. | ||||||
5252 | CXXRecordDecl *DestRecordDecl | ||||||
5253 | = cast<CXXRecordDecl>(DestRecordType->getDecl()); | ||||||
5254 | |||||||
5255 | // Try to complete the type we're converting to. | ||||||
5256 | if (S.isCompleteType(Kind.getLocation(), DestType)) { | ||||||
5257 | for (NamedDecl *D : S.LookupConstructors(DestRecordDecl)) { | ||||||
5258 | auto Info = getConstructorInfo(D); | ||||||
5259 | if (!Info.Constructor) | ||||||
5260 | continue; | ||||||
5261 | |||||||
5262 | if (!Info.Constructor->isInvalidDecl() && | ||||||
5263 | Info.Constructor->isConvertingConstructor(/*AllowExplicit*/true)) { | ||||||
5264 | if (Info.ConstructorTmpl) | ||||||
5265 | S.AddTemplateOverloadCandidate( | ||||||
5266 | Info.ConstructorTmpl, Info.FoundDecl, | ||||||
5267 | /*ExplicitArgs*/ nullptr, Initializer, CandidateSet, | ||||||
5268 | /*SuppressUserConversions=*/true, | ||||||
5269 | /*PartialOverloading*/ false, AllowExplicit); | ||||||
5270 | else | ||||||
5271 | S.AddOverloadCandidate(Info.Constructor, Info.FoundDecl, | ||||||
5272 | Initializer, CandidateSet, | ||||||
5273 | /*SuppressUserConversions=*/true, | ||||||
5274 | /*PartialOverloading*/ false, AllowExplicit); | ||||||
5275 | } | ||||||
5276 | } | ||||||
5277 | } | ||||||
5278 | } | ||||||
5279 | |||||||
5280 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||||
5281 | |||||||
5282 | if (const RecordType *SourceRecordType = SourceType->getAs<RecordType>()) { | ||||||
5283 | // The type we're converting from is a class type, enumerate its conversion | ||||||
5284 | // functions. | ||||||
5285 | |||||||
5286 | // We can only enumerate the conversion functions for a complete type; if | ||||||
5287 | // the type isn't complete, simply skip this step. | ||||||
5288 | if (S.isCompleteType(DeclLoc, SourceType)) { | ||||||
5289 | CXXRecordDecl *SourceRecordDecl | ||||||
5290 | = cast<CXXRecordDecl>(SourceRecordType->getDecl()); | ||||||
5291 | |||||||
5292 | const auto &Conversions = | ||||||
5293 | SourceRecordDecl->getVisibleConversionFunctions(); | ||||||
5294 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||||
5295 | NamedDecl *D = *I; | ||||||
5296 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||||
5297 | if (isa<UsingShadowDecl>(D)) | ||||||
5298 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | ||||||
5299 | |||||||
5300 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||||
5301 | CXXConversionDecl *Conv; | ||||||
5302 | if (ConvTemplate) | ||||||
5303 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||||
5304 | else | ||||||
5305 | Conv = cast<CXXConversionDecl>(D); | ||||||
5306 | |||||||
5307 | if (ConvTemplate) | ||||||
5308 | S.AddTemplateConversionCandidate( | ||||||
5309 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||||
5310 | CandidateSet, AllowExplicit, AllowExplicit); | ||||||
5311 | else | ||||||
5312 | S.AddConversionCandidate(Conv, I.getPair(), ActingDC, Initializer, | ||||||
5313 | DestType, CandidateSet, AllowExplicit, | ||||||
5314 | AllowExplicit); | ||||||
5315 | } | ||||||
5316 | } | ||||||
5317 | } | ||||||
5318 | |||||||
5319 | // Perform overload resolution. If it fails, return the failed result. | ||||||
5320 | OverloadCandidateSet::iterator Best; | ||||||
5321 | if (OverloadingResult Result | ||||||
5322 | = CandidateSet.BestViableFunction(S, DeclLoc, Best)) { | ||||||
5323 | Sequence.SetOverloadFailure( | ||||||
5324 | InitializationSequence::FK_UserConversionOverloadFailed, Result); | ||||||
5325 | |||||||
5326 | // [class.copy.elision]p3: | ||||||
5327 | // In some copy-initialization contexts, a two-stage overload resolution | ||||||
5328 | // is performed. | ||||||
5329 | // If the first overload resolution selects a deleted function, we also | ||||||
5330 | // need the initialization sequence to decide whether to perform the second | ||||||
5331 | // overload resolution. | ||||||
5332 | if (!(Result == OR_Deleted && | ||||||
5333 | Kind.getKind() == InitializationKind::IK_Copy)) | ||||||
5334 | return; | ||||||
5335 | } | ||||||
5336 | |||||||
5337 | FunctionDecl *Function = Best->Function; | ||||||
5338 | Function->setReferenced(); | ||||||
5339 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||||
5340 | |||||||
5341 | if (isa<CXXConstructorDecl>(Function)) { | ||||||
5342 | // Add the user-defined conversion step. Any cv-qualification conversion is | ||||||
5343 | // subsumed by the initialization. Per DR5, the created temporary is of the | ||||||
5344 | // cv-unqualified type of the destination. | ||||||
5345 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, | ||||||
5346 | DestType.getUnqualifiedType(), | ||||||
5347 | HadMultipleCandidates); | ||||||
5348 | |||||||
5349 | // C++14 and before: | ||||||
5350 | // - if the function is a constructor, the call initializes a temporary | ||||||
5351 | // of the cv-unqualified version of the destination type. The [...] | ||||||
5352 | // temporary [...] is then used to direct-initialize, according to the | ||||||
5353 | // rules above, the object that is the destination of the | ||||||
5354 | // copy-initialization. | ||||||
5355 | // Note that this just performs a simple object copy from the temporary. | ||||||
5356 | // | ||||||
5357 | // C++17: | ||||||
5358 | // - if the function is a constructor, the call is a prvalue of the | ||||||
5359 | // cv-unqualified version of the destination type whose return object | ||||||
5360 | // is initialized by the constructor. The call is used to | ||||||
5361 | // direct-initialize, according to the rules above, the object that | ||||||
5362 | // is the destination of the copy-initialization. | ||||||
5363 | // Therefore we need to do nothing further. | ||||||
5364 | // | ||||||
5365 | // FIXME: Mark this copy as extraneous. | ||||||
5366 | if (!S.getLangOpts().CPlusPlus17) | ||||||
5367 | Sequence.AddFinalCopy(DestType); | ||||||
5368 | else if (DestType.hasQualifiers()) | ||||||
5369 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||||
5370 | return; | ||||||
5371 | } | ||||||
5372 | |||||||
5373 | // Add the user-defined conversion step that calls the conversion function. | ||||||
5374 | QualType ConvType = Function->getCallResultType(); | ||||||
5375 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, ConvType, | ||||||
5376 | HadMultipleCandidates); | ||||||
5377 | |||||||
5378 | if (ConvType->getAs<RecordType>()) { | ||||||
5379 | // The call is used to direct-initialize [...] the object that is the | ||||||
5380 | // destination of the copy-initialization. | ||||||
5381 | // | ||||||
5382 | // In C++17, this does not call a constructor if we enter /17.6.1: | ||||||
5383 | // - If the initializer expression is a prvalue and the cv-unqualified | ||||||
5384 | // version of the source type is the same as the class of the | ||||||
5385 | // destination [... do not make an extra copy] | ||||||
5386 | // | ||||||
5387 | // FIXME: Mark this copy as extraneous. | ||||||
5388 | if (!S.getLangOpts().CPlusPlus17 || | ||||||
5389 | Function->getReturnType()->isReferenceType() || | ||||||
5390 | !S.Context.hasSameUnqualifiedType(ConvType, DestType)) | ||||||
5391 | Sequence.AddFinalCopy(DestType); | ||||||
5392 | else if (!S.Context.hasSameType(ConvType, DestType)) | ||||||
5393 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||||
5394 | return; | ||||||
5395 | } | ||||||
5396 | |||||||
5397 | // If the conversion following the call to the conversion function | ||||||
5398 | // is interesting, add it as a separate step. | ||||||
5399 | if (Best->FinalConversion.First || Best->FinalConversion.Second || | ||||||
5400 | Best->FinalConversion.Third) { | ||||||
5401 | ImplicitConversionSequence ICS; | ||||||
5402 | ICS.setStandard(); | ||||||
5403 | ICS.Standard = Best->FinalConversion; | ||||||
5404 | Sequence.AddConversionSequenceStep(ICS, DestType, TopLevelOfInitList); | ||||||
5405 | } | ||||||
5406 | } | ||||||
5407 | |||||||
5408 | /// An egregious hack for compatibility with libstdc++-4.2: in <tr1/hashtable>, | ||||||
5409 | /// a function with a pointer return type contains a 'return false;' statement. | ||||||
5410 | /// In C++11, 'false' is not a null pointer, so this breaks the build of any | ||||||
5411 | /// code using that header. | ||||||
5412 | /// | ||||||
5413 | /// Work around this by treating 'return false;' as zero-initializing the result | ||||||
5414 | /// if it's used in a pointer-returning function in a system header. | ||||||
5415 | static bool isLibstdcxxPointerReturnFalseHack(Sema &S, | ||||||
5416 | const InitializedEntity &Entity, | ||||||
5417 | const Expr *Init) { | ||||||
5418 | return S.getLangOpts().CPlusPlus11 && | ||||||
5419 | Entity.getKind() == InitializedEntity::EK_Result && | ||||||
5420 | Entity.getType()->isPointerType() && | ||||||
5421 | isa<CXXBoolLiteralExpr>(Init) && | ||||||
5422 | !cast<CXXBoolLiteralExpr>(Init)->getValue() && | ||||||
5423 | S.getSourceManager().isInSystemHeader(Init->getExprLoc()); | ||||||
5424 | } | ||||||
5425 | |||||||
5426 | /// The non-zero enum values here are indexes into diagnostic alternatives. | ||||||
5427 | enum InvalidICRKind { IIK_okay, IIK_nonlocal, IIK_nonscalar }; | ||||||
5428 | |||||||
5429 | /// Determines whether this expression is an acceptable ICR source. | ||||||
5430 | static InvalidICRKind isInvalidICRSource(ASTContext &C, Expr *e, | ||||||
5431 | bool isAddressOf, bool &isWeakAccess) { | ||||||
5432 | // Skip parens. | ||||||
5433 | e = e->IgnoreParens(); | ||||||
5434 | |||||||
5435 | // Skip address-of nodes. | ||||||
5436 | if (UnaryOperator *op = dyn_cast<UnaryOperator>(e)) { | ||||||
5437 | if (op->getOpcode() == UO_AddrOf) | ||||||
5438 | return isInvalidICRSource(C, op->getSubExpr(), /*addressof*/ true, | ||||||
5439 | isWeakAccess); | ||||||
5440 | |||||||
5441 | // Skip certain casts. | ||||||
5442 | } else if (CastExpr *ce = dyn_cast<CastExpr>(e)) { | ||||||
5443 | switch (ce->getCastKind()) { | ||||||
5444 | case CK_Dependent: | ||||||
5445 | case CK_BitCast: | ||||||
5446 | case CK_LValueBitCast: | ||||||
5447 | case CK_NoOp: | ||||||
5448 | return isInvalidICRSource(C, ce->getSubExpr(), isAddressOf, isWeakAccess); | ||||||
5449 | |||||||
5450 | case CK_ArrayToPointerDecay: | ||||||
5451 | return IIK_nonscalar; | ||||||
5452 | |||||||
5453 | case CK_NullToPointer: | ||||||
5454 | return IIK_okay; | ||||||
5455 | |||||||
5456 | default: | ||||||
5457 | break; | ||||||
5458 | } | ||||||
5459 | |||||||
5460 | // If we have a declaration reference, it had better be a local variable. | ||||||
5461 | } else if (isa<DeclRefExpr>(e)) { | ||||||
5462 | // set isWeakAccess to true, to mean that there will be an implicit | ||||||
5463 | // load which requires a cleanup. | ||||||
5464 | if (e->getType().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||||
5465 | isWeakAccess = true; | ||||||
5466 | |||||||
5467 | if (!isAddressOf) return IIK_nonlocal; | ||||||
5468 | |||||||
5469 | VarDecl *var = dyn_cast<VarDecl>(cast<DeclRefExpr>(e)->getDecl()); | ||||||
5470 | if (!var) return IIK_nonlocal; | ||||||
5471 | |||||||
5472 | return (var->hasLocalStorage() ? IIK_okay : IIK_nonlocal); | ||||||
5473 | |||||||
5474 | // If we have a conditional operator, check both sides. | ||||||
5475 | } else if (ConditionalOperator *cond = dyn_cast<ConditionalOperator>(e)) { | ||||||
5476 | if (InvalidICRKind iik = isInvalidICRSource(C, cond->getLHS(), isAddressOf, | ||||||
5477 | isWeakAccess)) | ||||||
5478 | return iik; | ||||||
5479 | |||||||
5480 | return isInvalidICRSource(C, cond->getRHS(), isAddressOf, isWeakAccess); | ||||||
5481 | |||||||
5482 | // These are never scalar. | ||||||
5483 | } else if (isa<ArraySubscriptExpr>(e)) { | ||||||
5484 | return IIK_nonscalar; | ||||||
5485 | |||||||
5486 | // Otherwise, it needs to be a null pointer constant. | ||||||
5487 | } else { | ||||||
5488 | return (e->isNullPointerConstant(C, Expr::NPC_ValueDependentIsNull) | ||||||
5489 | ? IIK_okay : IIK_nonlocal); | ||||||
5490 | } | ||||||
5491 | |||||||
5492 | return IIK_nonlocal; | ||||||
5493 | } | ||||||
5494 | |||||||
5495 | /// Check whether the given expression is a valid operand for an | ||||||
5496 | /// indirect copy/restore. | ||||||
5497 | static void checkIndirectCopyRestoreSource(Sema &S, Expr *src) { | ||||||
5498 | assert(src->isPRValue())(static_cast <bool> (src->isPRValue()) ? void (0) : __assert_fail ("src->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5498, __extension__ __PRETTY_FUNCTION__)); | ||||||
5499 | bool isWeakAccess = false; | ||||||
5500 | InvalidICRKind iik = isInvalidICRSource(S.Context, src, false, isWeakAccess); | ||||||
5501 | // If isWeakAccess to true, there will be an implicit | ||||||
5502 | // load which requires a cleanup. | ||||||
5503 | if (S.getLangOpts().ObjCAutoRefCount && isWeakAccess) | ||||||
5504 | S.Cleanup.setExprNeedsCleanups(true); | ||||||
5505 | |||||||
5506 | if (iik == IIK_okay) return; | ||||||
5507 | |||||||
5508 | S.Diag(src->getExprLoc(), diag::err_arc_nonlocal_writeback) | ||||||
5509 | << ((unsigned) iik - 1) // shift index into diagnostic explanations | ||||||
5510 | << src->getSourceRange(); | ||||||
5511 | } | ||||||
5512 | |||||||
5513 | /// Determine whether we have compatible array types for the | ||||||
5514 | /// purposes of GNU by-copy array initialization. | ||||||
5515 | static bool hasCompatibleArrayTypes(ASTContext &Context, const ArrayType *Dest, | ||||||
5516 | const ArrayType *Source) { | ||||||
5517 | // If the source and destination array types are equivalent, we're | ||||||
5518 | // done. | ||||||
5519 | if (Context.hasSameType(QualType(Dest, 0), QualType(Source, 0))) | ||||||
5520 | return true; | ||||||
5521 | |||||||
5522 | // Make sure that the element types are the same. | ||||||
5523 | if (!Context.hasSameType(Dest->getElementType(), Source->getElementType())) | ||||||
5524 | return false; | ||||||
5525 | |||||||
5526 | // The only mismatch we allow is when the destination is an | ||||||
5527 | // incomplete array type and the source is a constant array type. | ||||||
5528 | return Source->isConstantArrayType() && Dest->isIncompleteArrayType(); | ||||||
5529 | } | ||||||
5530 | |||||||
5531 | static bool tryObjCWritebackConversion(Sema &S, | ||||||
5532 | InitializationSequence &Sequence, | ||||||
5533 | const InitializedEntity &Entity, | ||||||
5534 | Expr *Initializer) { | ||||||
5535 | bool ArrayDecay = false; | ||||||
5536 | QualType ArgType = Initializer->getType(); | ||||||
5537 | QualType ArgPointee; | ||||||
5538 | if (const ArrayType *ArgArrayType = S.Context.getAsArrayType(ArgType)) { | ||||||
5539 | ArrayDecay = true; | ||||||
5540 | ArgPointee = ArgArrayType->getElementType(); | ||||||
5541 | ArgType = S.Context.getPointerType(ArgPointee); | ||||||
5542 | } | ||||||
5543 | |||||||
5544 | // Handle write-back conversion. | ||||||
5545 | QualType ConvertedArgType; | ||||||
5546 | if (!S.isObjCWritebackConversion(ArgType, Entity.getType(), | ||||||
5547 | ConvertedArgType)) | ||||||
5548 | return false; | ||||||
5549 | |||||||
5550 | // We should copy unless we're passing to an argument explicitly | ||||||
5551 | // marked 'out'. | ||||||
5552 | bool ShouldCopy = true; | ||||||
5553 | if (ParmVarDecl *param = cast_or_null<ParmVarDecl>(Entity.getDecl())) | ||||||
5554 | ShouldCopy = (param->getObjCDeclQualifier() != ParmVarDecl::OBJC_TQ_Out); | ||||||
5555 | |||||||
5556 | // Do we need an lvalue conversion? | ||||||
5557 | if (ArrayDecay || Initializer->isGLValue()) { | ||||||
5558 | ImplicitConversionSequence ICS; | ||||||
5559 | ICS.setStandard(); | ||||||
5560 | ICS.Standard.setAsIdentityConversion(); | ||||||
5561 | |||||||
5562 | QualType ResultType; | ||||||
5563 | if (ArrayDecay) { | ||||||
5564 | ICS.Standard.First = ICK_Array_To_Pointer; | ||||||
5565 | ResultType = S.Context.getPointerType(ArgPointee); | ||||||
5566 | } else { | ||||||
5567 | ICS.Standard.First = ICK_Lvalue_To_Rvalue; | ||||||
5568 | ResultType = Initializer->getType().getNonLValueExprType(S.Context); | ||||||
5569 | } | ||||||
5570 | |||||||
5571 | Sequence.AddConversionSequenceStep(ICS, ResultType); | ||||||
5572 | } | ||||||
5573 | |||||||
5574 | Sequence.AddPassByIndirectCopyRestoreStep(Entity.getType(), ShouldCopy); | ||||||
5575 | return true; | ||||||
5576 | } | ||||||
5577 | |||||||
5578 | static bool TryOCLSamplerInitialization(Sema &S, | ||||||
5579 | InitializationSequence &Sequence, | ||||||
5580 | QualType DestType, | ||||||
5581 | Expr *Initializer) { | ||||||
5582 | if (!S.getLangOpts().OpenCL || !DestType->isSamplerT() || | ||||||
5583 | (!Initializer->isIntegerConstantExpr(S.Context) && | ||||||
5584 | !Initializer->getType()->isSamplerT())) | ||||||
5585 | return false; | ||||||
5586 | |||||||
5587 | Sequence.AddOCLSamplerInitStep(DestType); | ||||||
5588 | return true; | ||||||
5589 | } | ||||||
5590 | |||||||
5591 | static bool IsZeroInitializer(Expr *Initializer, Sema &S) { | ||||||
5592 | return Initializer->isIntegerConstantExpr(S.getASTContext()) && | ||||||
5593 | (Initializer->EvaluateKnownConstInt(S.getASTContext()) == 0); | ||||||
5594 | } | ||||||
5595 | |||||||
5596 | static bool TryOCLZeroOpaqueTypeInitialization(Sema &S, | ||||||
5597 | InitializationSequence &Sequence, | ||||||
5598 | QualType DestType, | ||||||
5599 | Expr *Initializer) { | ||||||
5600 | if (!S.getLangOpts().OpenCL) | ||||||
5601 | return false; | ||||||
5602 | |||||||
5603 | // | ||||||
5604 | // OpenCL 1.2 spec, s6.12.10 | ||||||
5605 | // | ||||||
5606 | // The event argument can also be used to associate the | ||||||
5607 | // async_work_group_copy with a previous async copy allowing | ||||||
5608 | // an event to be shared by multiple async copies; otherwise | ||||||
5609 | // event should be zero. | ||||||
5610 | // | ||||||
5611 | if (DestType->isEventT() || DestType->isQueueT()) { | ||||||
5612 | if (!IsZeroInitializer(Initializer, S)) | ||||||
5613 | return false; | ||||||
5614 | |||||||
5615 | Sequence.AddOCLZeroOpaqueTypeStep(DestType); | ||||||
5616 | return true; | ||||||
5617 | } | ||||||
5618 | |||||||
5619 | // We should allow zero initialization for all types defined in the | ||||||
5620 | // cl_intel_device_side_avc_motion_estimation extension, except | ||||||
5621 | // intel_sub_group_avc_mce_payload_t and intel_sub_group_avc_mce_result_t. | ||||||
5622 | if (S.getOpenCLOptions().isAvailableOption( | ||||||
5623 | "cl_intel_device_side_avc_motion_estimation", S.getLangOpts()) && | ||||||
5624 | DestType->isOCLIntelSubgroupAVCType()) { | ||||||
5625 | if (DestType->isOCLIntelSubgroupAVCMcePayloadType() || | ||||||
5626 | DestType->isOCLIntelSubgroupAVCMceResultType()) | ||||||
5627 | return false; | ||||||
5628 | if (!IsZeroInitializer(Initializer, S)) | ||||||
5629 | return false; | ||||||
5630 | |||||||
5631 | Sequence.AddOCLZeroOpaqueTypeStep(DestType); | ||||||
5632 | return true; | ||||||
5633 | } | ||||||
5634 | |||||||
5635 | return false; | ||||||
5636 | } | ||||||
5637 | |||||||
5638 | InitializationSequence::InitializationSequence( | ||||||
5639 | Sema &S, const InitializedEntity &Entity, const InitializationKind &Kind, | ||||||
5640 | MultiExprArg Args, bool TopLevelOfInitList, bool TreatUnavailableAsInvalid) | ||||||
5641 | : FailedOverloadResult(OR_Success), | ||||||
5642 | FailedCandidateSet(Kind.getLocation(), OverloadCandidateSet::CSK_Normal) { | ||||||
5643 | InitializeFrom(S, Entity, Kind, Args, TopLevelOfInitList, | ||||||
5644 | TreatUnavailableAsInvalid); | ||||||
5645 | } | ||||||
5646 | |||||||
5647 | /// Tries to get a FunctionDecl out of `E`. If it succeeds and we can take the | ||||||
5648 | /// address of that function, this returns true. Otherwise, it returns false. | ||||||
5649 | static bool isExprAnUnaddressableFunction(Sema &S, const Expr *E) { | ||||||
5650 | auto *DRE = dyn_cast<DeclRefExpr>(E); | ||||||
5651 | if (!DRE || !isa<FunctionDecl>(DRE->getDecl())) | ||||||
5652 | return false; | ||||||
5653 | |||||||
5654 | return !S.checkAddressOfFunctionIsAvailable( | ||||||
5655 | cast<FunctionDecl>(DRE->getDecl())); | ||||||
5656 | } | ||||||
5657 | |||||||
5658 | /// Determine whether we can perform an elementwise array copy for this kind | ||||||
5659 | /// of entity. | ||||||
5660 | static bool canPerformArrayCopy(const InitializedEntity &Entity) { | ||||||
5661 | switch (Entity.getKind()) { | ||||||
5662 | case InitializedEntity::EK_LambdaCapture: | ||||||
5663 | // C++ [expr.prim.lambda]p24: | ||||||
5664 | // For array members, the array elements are direct-initialized in | ||||||
5665 | // increasing subscript order. | ||||||
5666 | return true; | ||||||
5667 | |||||||
5668 | case InitializedEntity::EK_Variable: | ||||||
5669 | // C++ [dcl.decomp]p1: | ||||||
5670 | // [...] each element is copy-initialized or direct-initialized from the | ||||||
5671 | // corresponding element of the assignment-expression [...] | ||||||
5672 | return isa<DecompositionDecl>(Entity.getDecl()); | ||||||
5673 | |||||||
5674 | case InitializedEntity::EK_Member: | ||||||
5675 | // C++ [class.copy.ctor]p14: | ||||||
5676 | // - if the member is an array, each element is direct-initialized with | ||||||
5677 | // the corresponding subobject of x | ||||||
5678 | return Entity.isImplicitMemberInitializer(); | ||||||
5679 | |||||||
5680 | case InitializedEntity::EK_ArrayElement: | ||||||
5681 | // All the above cases are intended to apply recursively, even though none | ||||||
5682 | // of them actually say that. | ||||||
5683 | if (auto *E = Entity.getParent()) | ||||||
5684 | return canPerformArrayCopy(*E); | ||||||
5685 | break; | ||||||
5686 | |||||||
5687 | default: | ||||||
5688 | break; | ||||||
5689 | } | ||||||
5690 | |||||||
5691 | return false; | ||||||
5692 | } | ||||||
5693 | |||||||
5694 | void InitializationSequence::InitializeFrom(Sema &S, | ||||||
5695 | const InitializedEntity &Entity, | ||||||
5696 | const InitializationKind &Kind, | ||||||
5697 | MultiExprArg Args, | ||||||
5698 | bool TopLevelOfInitList, | ||||||
5699 | bool TreatUnavailableAsInvalid) { | ||||||
5700 | ASTContext &Context = S.Context; | ||||||
5701 | |||||||
5702 | // Eliminate non-overload placeholder types in the arguments. We | ||||||
5703 | // need to do this before checking whether types are dependent | ||||||
5704 | // because lowering a pseudo-object expression might well give us | ||||||
5705 | // something of dependent type. | ||||||
5706 | for (unsigned I = 0, E = Args.size(); I != E; ++I) | ||||||
5707 | if (Args[I]->getType()->isNonOverloadPlaceholderType()) { | ||||||
5708 | // FIXME: should we be doing this here? | ||||||
5709 | ExprResult result = S.CheckPlaceholderExpr(Args[I]); | ||||||
5710 | if (result.isInvalid()) { | ||||||
5711 | SetFailed(FK_PlaceholderType); | ||||||
5712 | return; | ||||||
5713 | } | ||||||
5714 | Args[I] = result.get(); | ||||||
5715 | } | ||||||
5716 | |||||||
5717 | // C++0x [dcl.init]p16: | ||||||
5718 | // The semantics of initializers are as follows. The destination type is | ||||||
5719 | // the type of the object or reference being initialized and the source | ||||||
5720 | // type is the type of the initializer expression. The source type is not | ||||||
5721 | // defined when the initializer is a braced-init-list or when it is a | ||||||
5722 | // parenthesized list of expressions. | ||||||
5723 | QualType DestType = Entity.getType(); | ||||||
5724 | |||||||
5725 | if (DestType->isDependentType() || | ||||||
5726 | Expr::hasAnyTypeDependentArguments(Args)) { | ||||||
5727 | SequenceKind = DependentSequence; | ||||||
5728 | return; | ||||||
5729 | } | ||||||
5730 | |||||||
5731 | // Almost everything is a normal sequence. | ||||||
5732 | setSequenceKind(NormalSequence); | ||||||
5733 | |||||||
5734 | QualType SourceType; | ||||||
5735 | Expr *Initializer = nullptr; | ||||||
5736 | if (Args.size() == 1) { | ||||||
5737 | Initializer = Args[0]; | ||||||
5738 | if (S.getLangOpts().ObjC) { | ||||||
5739 | if (S.CheckObjCBridgeRelatedConversions(Initializer->getBeginLoc(), | ||||||
5740 | DestType, Initializer->getType(), | ||||||
5741 | Initializer) || | ||||||
5742 | S.CheckConversionToObjCLiteral(DestType, Initializer)) | ||||||
5743 | Args[0] = Initializer; | ||||||
5744 | } | ||||||
5745 | if (!isa<InitListExpr>(Initializer)) | ||||||
5746 | SourceType = Initializer->getType(); | ||||||
5747 | } | ||||||
5748 | |||||||
5749 | // - If the initializer is a (non-parenthesized) braced-init-list, the | ||||||
5750 | // object is list-initialized (8.5.4). | ||||||
5751 | if (Kind.getKind() != InitializationKind::IK_Direct) { | ||||||
5752 | if (InitListExpr *InitList = dyn_cast_or_null<InitListExpr>(Initializer)) { | ||||||
5753 | TryListInitialization(S, Entity, Kind, InitList, *this, | ||||||
5754 | TreatUnavailableAsInvalid); | ||||||
5755 | return; | ||||||
5756 | } | ||||||
5757 | } | ||||||
5758 | |||||||
5759 | // - If the destination type is a reference type, see 8.5.3. | ||||||
5760 | if (DestType->isReferenceType()) { | ||||||
5761 | // C++0x [dcl.init.ref]p1: | ||||||
5762 | // A variable declared to be a T& or T&&, that is, "reference to type T" | ||||||
5763 | // (8.3.2), shall be initialized by an object, or function, of type T or | ||||||
5764 | // by an object that can be converted into a T. | ||||||
5765 | // (Therefore, multiple arguments are not permitted.) | ||||||
5766 | if (Args.size() != 1) | ||||||
5767 | SetFailed(FK_TooManyInitsForReference); | ||||||
5768 | // C++17 [dcl.init.ref]p5: | ||||||
5769 | // A reference [...] is initialized by an expression [...] as follows: | ||||||
5770 | // If the initializer is not an expression, presumably we should reject, | ||||||
5771 | // but the standard fails to actually say so. | ||||||
5772 | else if (isa<InitListExpr>(Args[0])) | ||||||
5773 | SetFailed(FK_ParenthesizedListInitForReference); | ||||||
5774 | else | ||||||
5775 | TryReferenceInitialization(S, Entity, Kind, Args[0], *this); | ||||||
5776 | return; | ||||||
5777 | } | ||||||
5778 | |||||||
5779 | // - If the initializer is (), the object is value-initialized. | ||||||
5780 | if (Kind.getKind() == InitializationKind::IK_Value || | ||||||
5781 | (Kind.getKind() == InitializationKind::IK_Direct && Args.empty())) { | ||||||
5782 | TryValueInitialization(S, Entity, Kind, *this); | ||||||
5783 | return; | ||||||
5784 | } | ||||||
5785 | |||||||
5786 | // Handle default initialization. | ||||||
5787 | if (Kind.getKind() == InitializationKind::IK_Default) { | ||||||
5788 | TryDefaultInitialization(S, Entity, Kind, *this); | ||||||
5789 | return; | ||||||
5790 | } | ||||||
5791 | |||||||
5792 | // - If the destination type is an array of characters, an array of | ||||||
5793 | // char16_t, an array of char32_t, or an array of wchar_t, and the | ||||||
5794 | // initializer is a string literal, see 8.5.2. | ||||||
5795 | // - Otherwise, if the destination type is an array, the program is | ||||||
5796 | // ill-formed. | ||||||
5797 | if (const ArrayType *DestAT = Context.getAsArrayType(DestType)) { | ||||||
5798 | if (Initializer && isa<VariableArrayType>(DestAT)) { | ||||||
5799 | SetFailed(FK_VariableLengthArrayHasInitializer); | ||||||
5800 | return; | ||||||
5801 | } | ||||||
5802 | |||||||
5803 | if (Initializer) { | ||||||
5804 | switch (IsStringInit(Initializer, DestAT, Context)) { | ||||||
5805 | case SIF_None: | ||||||
5806 | TryStringLiteralInitialization(S, Entity, Kind, Initializer, *this); | ||||||
5807 | return; | ||||||
5808 | case SIF_NarrowStringIntoWideChar: | ||||||
5809 | SetFailed(FK_NarrowStringIntoWideCharArray); | ||||||
5810 | return; | ||||||
5811 | case SIF_WideStringIntoChar: | ||||||
5812 | SetFailed(FK_WideStringIntoCharArray); | ||||||
5813 | return; | ||||||
5814 | case SIF_IncompatWideStringIntoWideChar: | ||||||
5815 | SetFailed(FK_IncompatWideStringIntoWideChar); | ||||||
5816 | return; | ||||||
5817 | case SIF_PlainStringIntoUTF8Char: | ||||||
5818 | SetFailed(FK_PlainStringIntoUTF8Char); | ||||||
5819 | return; | ||||||
5820 | case SIF_UTF8StringIntoPlainChar: | ||||||
5821 | SetFailed(FK_UTF8StringIntoPlainChar); | ||||||
5822 | return; | ||||||
5823 | case SIF_Other: | ||||||
5824 | break; | ||||||
5825 | } | ||||||
5826 | } | ||||||
5827 | |||||||
5828 | // Some kinds of initialization permit an array to be initialized from | ||||||
5829 | // another array of the same type, and perform elementwise initialization. | ||||||
5830 | if (Initializer && isa<ConstantArrayType>(DestAT) && | ||||||
5831 | S.Context.hasSameUnqualifiedType(Initializer->getType(), | ||||||
5832 | Entity.getType()) && | ||||||
5833 | canPerformArrayCopy(Entity)) { | ||||||
5834 | // If source is a prvalue, use it directly. | ||||||
5835 | if (Initializer->isPRValue()) { | ||||||
5836 | AddArrayInitStep(DestType, /*IsGNUExtension*/false); | ||||||
5837 | return; | ||||||
5838 | } | ||||||
5839 | |||||||
5840 | // Emit element-at-a-time copy loop. | ||||||
5841 | InitializedEntity Element = | ||||||
5842 | InitializedEntity::InitializeElement(S.Context, 0, Entity); | ||||||
5843 | QualType InitEltT = | ||||||
5844 | Context.getAsArrayType(Initializer->getType())->getElementType(); | ||||||
5845 | OpaqueValueExpr OVE(Initializer->getExprLoc(), InitEltT, | ||||||
5846 | Initializer->getValueKind(), | ||||||
5847 | Initializer->getObjectKind()); | ||||||
5848 | Expr *OVEAsExpr = &OVE; | ||||||
5849 | InitializeFrom(S, Element, Kind, OVEAsExpr, TopLevelOfInitList, | ||||||
5850 | TreatUnavailableAsInvalid); | ||||||
5851 | if (!Failed()) | ||||||
5852 | AddArrayInitLoopStep(Entity.getType(), InitEltT); | ||||||
5853 | return; | ||||||
5854 | } | ||||||
5855 | |||||||
5856 | // Note: as an GNU C extension, we allow initialization of an | ||||||
5857 | // array from a compound literal that creates an array of the same | ||||||
5858 | // type, so long as the initializer has no side effects. | ||||||
5859 | if (!S.getLangOpts().CPlusPlus && Initializer && | ||||||
5860 | isa<CompoundLiteralExpr>(Initializer->IgnoreParens()) && | ||||||
5861 | Initializer->getType()->isArrayType()) { | ||||||
5862 | const ArrayType *SourceAT | ||||||
5863 | = Context.getAsArrayType(Initializer->getType()); | ||||||
5864 | if (!hasCompatibleArrayTypes(S.Context, DestAT, SourceAT)) | ||||||
5865 | SetFailed(FK_ArrayTypeMismatch); | ||||||
5866 | else if (Initializer->HasSideEffects(S.Context)) | ||||||
5867 | SetFailed(FK_NonConstantArrayInit); | ||||||
5868 | else { | ||||||
5869 | AddArrayInitStep(DestType, /*IsGNUExtension*/true); | ||||||
5870 | } | ||||||
5871 | } | ||||||
5872 | // Note: as a GNU C++ extension, we allow list-initialization of a | ||||||
5873 | // class member of array type from a parenthesized initializer list. | ||||||
5874 | else if (S.getLangOpts().CPlusPlus && | ||||||
5875 | Entity.getKind() == InitializedEntity::EK_Member && | ||||||
5876 | Initializer && isa<InitListExpr>(Initializer)) { | ||||||
5877 | TryListInitialization(S, Entity, Kind, cast<InitListExpr>(Initializer), | ||||||
5878 | *this, TreatUnavailableAsInvalid); | ||||||
5879 | AddParenthesizedArrayInitStep(DestType); | ||||||
5880 | } else if (DestAT->getElementType()->isCharType()) | ||||||
5881 | SetFailed(FK_ArrayNeedsInitListOrStringLiteral); | ||||||
5882 | else if (IsWideCharCompatible(DestAT->getElementType(), Context)) | ||||||
5883 | SetFailed(FK_ArrayNeedsInitListOrWideStringLiteral); | ||||||
5884 | else | ||||||
5885 | SetFailed(FK_ArrayNeedsInitList); | ||||||
5886 | |||||||
5887 | return; | ||||||
5888 | } | ||||||
5889 | |||||||
5890 | // Determine whether we should consider writeback conversions for | ||||||
5891 | // Objective-C ARC. | ||||||
5892 | bool allowObjCWritebackConversion = S.getLangOpts().ObjCAutoRefCount && | ||||||
5893 | Entity.isParameterKind(); | ||||||
5894 | |||||||
5895 | if (TryOCLSamplerInitialization(S, *this, DestType, Initializer)) | ||||||
5896 | return; | ||||||
5897 | |||||||
5898 | // We're at the end of the line for C: it's either a write-back conversion | ||||||
5899 | // or it's a C assignment. There's no need to check anything else. | ||||||
5900 | if (!S.getLangOpts().CPlusPlus) { | ||||||
5901 | // If allowed, check whether this is an Objective-C writeback conversion. | ||||||
5902 | if (allowObjCWritebackConversion && | ||||||
5903 | tryObjCWritebackConversion(S, *this, Entity, Initializer)) { | ||||||
5904 | return; | ||||||
5905 | } | ||||||
5906 | |||||||
5907 | if (TryOCLZeroOpaqueTypeInitialization(S, *this, DestType, Initializer)) | ||||||
5908 | return; | ||||||
5909 | |||||||
5910 | // Handle initialization in C | ||||||
5911 | AddCAssignmentStep(DestType); | ||||||
5912 | MaybeProduceObjCObject(S, *this, Entity); | ||||||
5913 | return; | ||||||
5914 | } | ||||||
5915 | |||||||
5916 | assert(S.getLangOpts().CPlusPlus)(static_cast <bool> (S.getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("S.getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5916, __extension__ __PRETTY_FUNCTION__)); | ||||||
5917 | |||||||
5918 | // - If the destination type is a (possibly cv-qualified) class type: | ||||||
5919 | if (DestType->isRecordType()) { | ||||||
5920 | // - If the initialization is direct-initialization, or if it is | ||||||
5921 | // copy-initialization where the cv-unqualified version of the | ||||||
5922 | // source type is the same class as, or a derived class of, the | ||||||
5923 | // class of the destination, constructors are considered. [...] | ||||||
5924 | if (Kind.getKind() == InitializationKind::IK_Direct || | ||||||
5925 | (Kind.getKind() == InitializationKind::IK_Copy && | ||||||
5926 | (Context.hasSameUnqualifiedType(SourceType, DestType) || | ||||||
5927 | S.IsDerivedFrom(Initializer->getBeginLoc(), SourceType, DestType)))) | ||||||
5928 | TryConstructorInitialization(S, Entity, Kind, Args, | ||||||
5929 | DestType, DestType, *this); | ||||||
5930 | // - Otherwise (i.e., for the remaining copy-initialization cases), | ||||||
5931 | // user-defined conversion sequences that can convert from the source | ||||||
5932 | // type to the destination type or (when a conversion function is | ||||||
5933 | // used) to a derived class thereof are enumerated as described in | ||||||
5934 | // 13.3.1.4, and the best one is chosen through overload resolution | ||||||
5935 | // (13.3). | ||||||
5936 | else | ||||||
5937 | TryUserDefinedConversion(S, DestType, Kind, Initializer, *this, | ||||||
5938 | TopLevelOfInitList); | ||||||
5939 | return; | ||||||
5940 | } | ||||||
5941 | |||||||
5942 | assert(Args.size() >= 1 && "Zero-argument case handled above")(static_cast <bool> (Args.size() >= 1 && "Zero-argument case handled above" ) ? void (0) : __assert_fail ("Args.size() >= 1 && \"Zero-argument case handled above\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5942, __extension__ __PRETTY_FUNCTION__)); | ||||||
5943 | |||||||
5944 | // The remaining cases all need a source type. | ||||||
5945 | if (Args.size() > 1) { | ||||||
5946 | SetFailed(FK_TooManyInitsForScalar); | ||||||
5947 | return; | ||||||
5948 | } else if (isa<InitListExpr>(Args[0])) { | ||||||
5949 | SetFailed(FK_ParenthesizedListInitForScalar); | ||||||
5950 | return; | ||||||
5951 | } | ||||||
5952 | |||||||
5953 | // - Otherwise, if the source type is a (possibly cv-qualified) class | ||||||
5954 | // type, conversion functions are considered. | ||||||
5955 | if (!SourceType.isNull() && SourceType->isRecordType()) { | ||||||
5956 | // For a conversion to _Atomic(T) from either T or a class type derived | ||||||
5957 | // from T, initialize the T object then convert to _Atomic type. | ||||||
5958 | bool NeedAtomicConversion = false; | ||||||
5959 | if (const AtomicType *Atomic = DestType->getAs<AtomicType>()) { | ||||||
5960 | if (Context.hasSameUnqualifiedType(SourceType, Atomic->getValueType()) || | ||||||
5961 | S.IsDerivedFrom(Initializer->getBeginLoc(), SourceType, | ||||||
5962 | Atomic->getValueType())) { | ||||||
5963 | DestType = Atomic->getValueType(); | ||||||
5964 | NeedAtomicConversion = true; | ||||||
5965 | } | ||||||
5966 | } | ||||||
5967 | |||||||
5968 | TryUserDefinedConversion(S, DestType, Kind, Initializer, *this, | ||||||
5969 | TopLevelOfInitList); | ||||||
5970 | MaybeProduceObjCObject(S, *this, Entity); | ||||||
5971 | if (!Failed() && NeedAtomicConversion) | ||||||
5972 | AddAtomicConversionStep(Entity.getType()); | ||||||
5973 | return; | ||||||
5974 | } | ||||||
5975 | |||||||
5976 | // - Otherwise, if the initialization is direct-initialization, the source | ||||||
5977 | // type is std::nullptr_t, and the destination type is bool, the initial | ||||||
5978 | // value of the object being initialized is false. | ||||||
5979 | if (!SourceType.isNull() && SourceType->isNullPtrType() && | ||||||
5980 | DestType->isBooleanType() && | ||||||
5981 | Kind.getKind() == InitializationKind::IK_Direct) { | ||||||
5982 | AddConversionSequenceStep( | ||||||
5983 | ImplicitConversionSequence::getNullptrToBool(SourceType, DestType, | ||||||
5984 | Initializer->isGLValue()), | ||||||
5985 | DestType); | ||||||
5986 | return; | ||||||
5987 | } | ||||||
5988 | |||||||
5989 | // - Otherwise, the initial value of the object being initialized is the | ||||||
5990 | // (possibly converted) value of the initializer expression. Standard | ||||||
5991 | // conversions (Clause 4) will be used, if necessary, to convert the | ||||||
5992 | // initializer expression to the cv-unqualified version of the | ||||||
5993 | // destination type; no user-defined conversions are considered. | ||||||
5994 | |||||||
5995 | ImplicitConversionSequence ICS | ||||||
5996 | = S.TryImplicitConversion(Initializer, DestType, | ||||||
5997 | /*SuppressUserConversions*/true, | ||||||
5998 | Sema::AllowedExplicit::None, | ||||||
5999 | /*InOverloadResolution*/ false, | ||||||
6000 | /*CStyle=*/Kind.isCStyleOrFunctionalCast(), | ||||||
6001 | allowObjCWritebackConversion); | ||||||
6002 | |||||||
6003 | if (ICS.isStandard() && | ||||||
6004 | ICS.Standard.Second == ICK_Writeback_Conversion) { | ||||||
6005 | // Objective-C ARC writeback conversion. | ||||||
6006 | |||||||
6007 | // We should copy unless we're passing to an argument explicitly | ||||||
6008 | // marked 'out'. | ||||||
6009 | bool ShouldCopy = true; | ||||||
6010 | if (ParmVarDecl *Param = cast_or_null<ParmVarDecl>(Entity.getDecl())) | ||||||
6011 | ShouldCopy = (Param->getObjCDeclQualifier() != ParmVarDecl::OBJC_TQ_Out); | ||||||
6012 | |||||||
6013 | // If there was an lvalue adjustment, add it as a separate conversion. | ||||||
6014 | if (ICS.Standard.First == ICK_Array_To_Pointer || | ||||||
6015 | ICS.Standard.First == ICK_Lvalue_To_Rvalue) { | ||||||
6016 | ImplicitConversionSequence LvalueICS; | ||||||
6017 | LvalueICS.setStandard(); | ||||||
6018 | LvalueICS.Standard.setAsIdentityConversion(); | ||||||
6019 | LvalueICS.Standard.setAllToTypes(ICS.Standard.getToType(0)); | ||||||
6020 | LvalueICS.Standard.First = ICS.Standard.First; | ||||||
6021 | AddConversionSequenceStep(LvalueICS, ICS.Standard.getToType(0)); | ||||||
6022 | } | ||||||
6023 | |||||||
6024 | AddPassByIndirectCopyRestoreStep(DestType, ShouldCopy); | ||||||
6025 | } else if (ICS.isBad()) { | ||||||
6026 | DeclAccessPair dap; | ||||||
6027 | if (isLibstdcxxPointerReturnFalseHack(S, Entity, Initializer)) { | ||||||
6028 | AddZeroInitializationStep(Entity.getType()); | ||||||
6029 | } else if (Initializer->getType() == Context.OverloadTy && | ||||||
6030 | !S.ResolveAddressOfOverloadedFunction(Initializer, DestType, | ||||||
6031 | false, dap)) | ||||||
6032 | SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||||
6033 | else if (Initializer->getType()->isFunctionType() && | ||||||
6034 | isExprAnUnaddressableFunction(S, Initializer)) | ||||||
6035 | SetFailed(InitializationSequence::FK_AddressOfUnaddressableFunction); | ||||||
6036 | else | ||||||
6037 | SetFailed(InitializationSequence::FK_ConversionFailed); | ||||||
6038 | } else { | ||||||
6039 | AddConversionSequenceStep(ICS, DestType, TopLevelOfInitList); | ||||||
6040 | |||||||
6041 | MaybeProduceObjCObject(S, *this, Entity); | ||||||
6042 | } | ||||||
6043 | } | ||||||
6044 | |||||||
6045 | InitializationSequence::~InitializationSequence() { | ||||||
6046 | for (auto &S : Steps) | ||||||
6047 | S.Destroy(); | ||||||
6048 | } | ||||||
6049 | |||||||
6050 | //===----------------------------------------------------------------------===// | ||||||
6051 | // Perform initialization | ||||||
6052 | //===----------------------------------------------------------------------===// | ||||||
6053 | static Sema::AssignmentAction | ||||||
6054 | getAssignmentAction(const InitializedEntity &Entity, bool Diagnose = false) { | ||||||
6055 | switch(Entity.getKind()) { | ||||||
6056 | case InitializedEntity::EK_Variable: | ||||||
6057 | case InitializedEntity::EK_New: | ||||||
6058 | case InitializedEntity::EK_Exception: | ||||||
6059 | case InitializedEntity::EK_Base: | ||||||
6060 | case InitializedEntity::EK_Delegating: | ||||||
6061 | return Sema::AA_Initializing; | ||||||
6062 | |||||||
6063 | case InitializedEntity::EK_Parameter: | ||||||
6064 | if (Entity.getDecl() && | ||||||
6065 | isa<ObjCMethodDecl>(Entity.getDecl()->getDeclContext())) | ||||||
6066 | return Sema::AA_Sending; | ||||||
6067 | |||||||
6068 | return Sema::AA_Passing; | ||||||
6069 | |||||||
6070 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
6071 | if (Entity.getDecl() && | ||||||
6072 | isa<ObjCMethodDecl>(Entity.getDecl()->getDeclContext())) | ||||||
6073 | return Sema::AA_Sending; | ||||||
6074 | |||||||
6075 | return !Diagnose ? Sema::AA_Passing : Sema::AA_Passing_CFAudited; | ||||||
6076 | |||||||
6077 | case InitializedEntity::EK_Result: | ||||||
6078 | case InitializedEntity::EK_StmtExprResult: // FIXME: Not quite right. | ||||||
6079 | return Sema::AA_Returning; | ||||||
6080 | |||||||
6081 | case InitializedEntity::EK_Temporary: | ||||||
6082 | case InitializedEntity::EK_RelatedResult: | ||||||
6083 | // FIXME: Can we tell apart casting vs. converting? | ||||||
6084 | return Sema::AA_Casting; | ||||||
6085 | |||||||
6086 | case InitializedEntity::EK_TemplateParameter: | ||||||
6087 | // This is really initialization, but refer to it as conversion for | ||||||
6088 | // consistency with CheckConvertedConstantExpression. | ||||||
6089 | return Sema::AA_Converting; | ||||||
6090 | |||||||
6091 | case InitializedEntity::EK_Member: | ||||||
6092 | case InitializedEntity::EK_Binding: | ||||||
6093 | case InitializedEntity::EK_ArrayElement: | ||||||
6094 | case InitializedEntity::EK_VectorElement: | ||||||
6095 | case InitializedEntity::EK_ComplexElement: | ||||||
6096 | case InitializedEntity::EK_BlockElement: | ||||||
6097 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
6098 | case InitializedEntity::EK_LambdaCapture: | ||||||
6099 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6100 | return Sema::AA_Initializing; | ||||||
6101 | } | ||||||
6102 | |||||||
6103 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6103); | ||||||
6104 | } | ||||||
6105 | |||||||
6106 | /// Whether we should bind a created object as a temporary when | ||||||
6107 | /// initializing the given entity. | ||||||
6108 | static bool shouldBindAsTemporary(const InitializedEntity &Entity) { | ||||||
6109 | switch (Entity.getKind()) { | ||||||
6110 | case InitializedEntity::EK_ArrayElement: | ||||||
6111 | case InitializedEntity::EK_Member: | ||||||
6112 | case InitializedEntity::EK_Result: | ||||||
6113 | case InitializedEntity::EK_StmtExprResult: | ||||||
6114 | case InitializedEntity::EK_New: | ||||||
6115 | case InitializedEntity::EK_Variable: | ||||||
6116 | case InitializedEntity::EK_Base: | ||||||
6117 | case InitializedEntity::EK_Delegating: | ||||||
6118 | case InitializedEntity::EK_VectorElement: | ||||||
6119 | case InitializedEntity::EK_ComplexElement: | ||||||
6120 | case InitializedEntity::EK_Exception: | ||||||
6121 | case InitializedEntity::EK_BlockElement: | ||||||
6122 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
6123 | case InitializedEntity::EK_LambdaCapture: | ||||||
6124 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6125 | case InitializedEntity::EK_TemplateParameter: | ||||||
6126 | return false; | ||||||
6127 | |||||||
6128 | case InitializedEntity::EK_Parameter: | ||||||
6129 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
6130 | case InitializedEntity::EK_Temporary: | ||||||
6131 | case InitializedEntity::EK_RelatedResult: | ||||||
6132 | case InitializedEntity::EK_Binding: | ||||||
6133 | return true; | ||||||
6134 | } | ||||||
6135 | |||||||
6136 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6136); | ||||||
6137 | } | ||||||
6138 | |||||||
6139 | /// Whether the given entity, when initialized with an object | ||||||
6140 | /// created for that initialization, requires destruction. | ||||||
6141 | static bool shouldDestroyEntity(const InitializedEntity &Entity) { | ||||||
6142 | switch (Entity.getKind()) { | ||||||
6143 | case InitializedEntity::EK_Result: | ||||||
6144 | case InitializedEntity::EK_StmtExprResult: | ||||||
6145 | case InitializedEntity::EK_New: | ||||||
6146 | case InitializedEntity::EK_Base: | ||||||
6147 | case InitializedEntity::EK_Delegating: | ||||||
6148 | case InitializedEntity::EK_VectorElement: | ||||||
6149 | case InitializedEntity::EK_ComplexElement: | ||||||
6150 | case InitializedEntity::EK_BlockElement: | ||||||
6151 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
6152 | case InitializedEntity::EK_LambdaCapture: | ||||||
6153 | return false; | ||||||
6154 | |||||||
6155 | case InitializedEntity::EK_Member: | ||||||
6156 | case InitializedEntity::EK_Binding: | ||||||
6157 | case InitializedEntity::EK_Variable: | ||||||
6158 | case InitializedEntity::EK_Parameter: | ||||||
6159 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
6160 | case InitializedEntity::EK_TemplateParameter: | ||||||
6161 | case InitializedEntity::EK_Temporary: | ||||||
6162 | case InitializedEntity::EK_ArrayElement: | ||||||
6163 | case InitializedEntity::EK_Exception: | ||||||
6164 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6165 | case InitializedEntity::EK_RelatedResult: | ||||||
6166 | return true; | ||||||
6167 | } | ||||||
6168 | |||||||
6169 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6169); | ||||||
6170 | } | ||||||
6171 | |||||||
6172 | /// Get the location at which initialization diagnostics should appear. | ||||||
6173 | static SourceLocation getInitializationLoc(const InitializedEntity &Entity, | ||||||
6174 | Expr *Initializer) { | ||||||
6175 | switch (Entity.getKind()) { | ||||||
6176 | case InitializedEntity::EK_Result: | ||||||
6177 | case InitializedEntity::EK_StmtExprResult: | ||||||
6178 | return Entity.getReturnLoc(); | ||||||
6179 | |||||||
6180 | case InitializedEntity::EK_Exception: | ||||||
6181 | return Entity.getThrowLoc(); | ||||||
6182 | |||||||
6183 | case InitializedEntity::EK_Variable: | ||||||
6184 | case InitializedEntity::EK_Binding: | ||||||
6185 | return Entity.getDecl()->getLocation(); | ||||||
6186 | |||||||
6187 | case InitializedEntity::EK_LambdaCapture: | ||||||
6188 | return Entity.getCaptureLoc(); | ||||||
6189 | |||||||
6190 | case InitializedEntity::EK_ArrayElement: | ||||||
6191 | case InitializedEntity::EK_Member: | ||||||
6192 | case InitializedEntity::EK_Parameter: | ||||||
6193 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
6194 | case InitializedEntity::EK_TemplateParameter: | ||||||
6195 | case InitializedEntity::EK_Temporary: | ||||||
6196 | case InitializedEntity::EK_New: | ||||||
6197 | case InitializedEntity::EK_Base: | ||||||
6198 | case InitializedEntity::EK_Delegating: | ||||||
6199 | case InitializedEntity::EK_VectorElement: | ||||||
6200 | case InitializedEntity::EK_ComplexElement: | ||||||
6201 | case InitializedEntity::EK_BlockElement: | ||||||
6202 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
6203 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6204 | case InitializedEntity::EK_RelatedResult: | ||||||
6205 | return Initializer->getBeginLoc(); | ||||||
6206 | } | ||||||
6207 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6207); | ||||||
6208 | } | ||||||
6209 | |||||||
6210 | /// Make a (potentially elidable) temporary copy of the object | ||||||
6211 | /// provided by the given initializer by calling the appropriate copy | ||||||
6212 | /// constructor. | ||||||
6213 | /// | ||||||
6214 | /// \param S The Sema object used for type-checking. | ||||||
6215 | /// | ||||||
6216 | /// \param T The type of the temporary object, which must either be | ||||||
6217 | /// the type of the initializer expression or a superclass thereof. | ||||||
6218 | /// | ||||||
6219 | /// \param Entity The entity being initialized. | ||||||
6220 | /// | ||||||
6221 | /// \param CurInit The initializer expression. | ||||||
6222 | /// | ||||||
6223 | /// \param IsExtraneousCopy Whether this is an "extraneous" copy that | ||||||
6224 | /// is permitted in C++03 (but not C++0x) when binding a reference to | ||||||
6225 | /// an rvalue. | ||||||
6226 | /// | ||||||
6227 | /// \returns An expression that copies the initializer expression into | ||||||
6228 | /// a temporary object, or an error expression if a copy could not be | ||||||
6229 | /// created. | ||||||
6230 | static ExprResult CopyObject(Sema &S, | ||||||
6231 | QualType T, | ||||||
6232 | const InitializedEntity &Entity, | ||||||
6233 | ExprResult CurInit, | ||||||
6234 | bool IsExtraneousCopy) { | ||||||
6235 | if (CurInit.isInvalid()) | ||||||
6236 | return CurInit; | ||||||
6237 | // Determine which class type we're copying to. | ||||||
6238 | Expr *CurInitExpr = (Expr *)CurInit.get(); | ||||||
6239 | CXXRecordDecl *Class = nullptr; | ||||||
6240 | if (const RecordType *Record = T->getAs<RecordType>()) | ||||||
6241 | Class = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
6242 | if (!Class) | ||||||
6243 | return CurInit; | ||||||
6244 | |||||||
6245 | SourceLocation Loc = getInitializationLoc(Entity, CurInit.get()); | ||||||
6246 | |||||||
6247 | // Make sure that the type we are copying is complete. | ||||||
6248 | if (S.RequireCompleteType(Loc, T, diag::err_temp_copy_incomplete)) | ||||||
6249 | return CurInit; | ||||||
6250 | |||||||
6251 | // Perform overload resolution using the class's constructors. Per | ||||||
6252 | // C++11 [dcl.init]p16, second bullet for class types, this initialization | ||||||
6253 | // is direct-initialization. | ||||||
6254 | OverloadCandidateSet CandidateSet(Loc, OverloadCandidateSet::CSK_Normal); | ||||||
6255 | DeclContext::lookup_result Ctors = S.LookupConstructors(Class); | ||||||
6256 | |||||||
6257 | OverloadCandidateSet::iterator Best; | ||||||
6258 | switch (ResolveConstructorOverload( | ||||||
6259 | S, Loc, CurInitExpr, CandidateSet, T, Ctors, Best, | ||||||
6260 | /*CopyInitializing=*/false, /*AllowExplicit=*/true, | ||||||
6261 | /*OnlyListConstructors=*/false, /*IsListInit=*/false, | ||||||
6262 | /*SecondStepOfCopyInit=*/true)) { | ||||||
6263 | case OR_Success: | ||||||
6264 | break; | ||||||
6265 | |||||||
6266 | case OR_No_Viable_Function: | ||||||
6267 | CandidateSet.NoteCandidates( | ||||||
6268 | PartialDiagnosticAt( | ||||||
6269 | Loc, S.PDiag(IsExtraneousCopy && !S.isSFINAEContext() | ||||||
6270 | ? diag::ext_rvalue_to_reference_temp_copy_no_viable | ||||||
6271 | : diag::err_temp_copy_no_viable) | ||||||
6272 | << (int)Entity.getKind() << CurInitExpr->getType() | ||||||
6273 | << CurInitExpr->getSourceRange()), | ||||||
6274 | S, OCD_AllCandidates, CurInitExpr); | ||||||
6275 | if (!IsExtraneousCopy || S.isSFINAEContext()) | ||||||
6276 | return ExprError(); | ||||||
6277 | return CurInit; | ||||||
6278 | |||||||
6279 | case OR_Ambiguous: | ||||||
6280 | CandidateSet.NoteCandidates( | ||||||
6281 | PartialDiagnosticAt(Loc, S.PDiag(diag::err_temp_copy_ambiguous) | ||||||
6282 | << (int)Entity.getKind() | ||||||
6283 | << CurInitExpr->getType() | ||||||
6284 | << CurInitExpr->getSourceRange()), | ||||||
6285 | S, OCD_AmbiguousCandidates, CurInitExpr); | ||||||
6286 | return ExprError(); | ||||||
6287 | |||||||
6288 | case OR_Deleted: | ||||||
6289 | S.Diag(Loc, diag::err_temp_copy_deleted) | ||||||
6290 | << (int)Entity.getKind() << CurInitExpr->getType() | ||||||
6291 | << CurInitExpr->getSourceRange(); | ||||||
6292 | S.NoteDeletedFunction(Best->Function); | ||||||
6293 | return ExprError(); | ||||||
6294 | } | ||||||
6295 | |||||||
6296 | bool HadMultipleCandidates = CandidateSet.size() > 1; | ||||||
6297 | |||||||
6298 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function); | ||||||
6299 | SmallVector<Expr*, 8> ConstructorArgs; | ||||||
6300 | CurInit.get(); // Ownership transferred into MultiExprArg, below. | ||||||
6301 | |||||||
6302 | S.CheckConstructorAccess(Loc, Constructor, Best->FoundDecl, Entity, | ||||||
6303 | IsExtraneousCopy); | ||||||
6304 | |||||||
6305 | if (IsExtraneousCopy) { | ||||||
6306 | // If this is a totally extraneous copy for C++03 reference | ||||||
6307 | // binding purposes, just return the original initialization | ||||||
6308 | // expression. We don't generate an (elided) copy operation here | ||||||
6309 | // because doing so would require us to pass down a flag to avoid | ||||||
6310 | // infinite recursion, where each step adds another extraneous, | ||||||
6311 | // elidable copy. | ||||||
6312 | |||||||
6313 | // Instantiate the default arguments of any extra parameters in | ||||||
6314 | // the selected copy constructor, as if we were going to create a | ||||||
6315 | // proper call to the copy constructor. | ||||||
6316 | for (unsigned I = 1, N = Constructor->getNumParams(); I != N; ++I) { | ||||||
6317 | ParmVarDecl *Parm = Constructor->getParamDecl(I); | ||||||
6318 | if (S.RequireCompleteType(Loc, Parm->getType(), | ||||||
6319 | diag::err_call_incomplete_argument)) | ||||||
6320 | break; | ||||||
6321 | |||||||
6322 | // Build the default argument expression; we don't actually care | ||||||
6323 | // if this succeeds or not, because this routine will complain | ||||||
6324 | // if there was a problem. | ||||||
6325 | S.BuildCXXDefaultArgExpr(Loc, Constructor, Parm); | ||||||
6326 | } | ||||||
6327 | |||||||
6328 | return CurInitExpr; | ||||||
6329 | } | ||||||
6330 | |||||||
6331 | // Determine the arguments required to actually perform the | ||||||
6332 | // constructor call (we might have derived-to-base conversions, or | ||||||
6333 | // the copy constructor may have default arguments). | ||||||
6334 | if (S.CompleteConstructorCall(Constructor, T, CurInitExpr, Loc, | ||||||
6335 | ConstructorArgs)) | ||||||
6336 | return ExprError(); | ||||||
6337 | |||||||
6338 | // C++0x [class.copy]p32: | ||||||
6339 | // When certain criteria are met, an implementation is allowed to | ||||||
6340 | // omit the copy/move construction of a class object, even if the | ||||||
6341 | // copy/move constructor and/or destructor for the object have | ||||||
6342 | // side effects. [...] | ||||||
6343 | // - when a temporary class object that has not been bound to a | ||||||
6344 | // reference (12.2) would be copied/moved to a class object | ||||||
6345 | // with the same cv-unqualified type, the copy/move operation | ||||||
6346 | // can be omitted by constructing the temporary object | ||||||
6347 | // directly into the target of the omitted copy/move | ||||||
6348 | // | ||||||
6349 | // Note that the other three bullets are handled elsewhere. Copy | ||||||
6350 | // elision for return statements and throw expressions are handled as part | ||||||
6351 | // of constructor initialization, while copy elision for exception handlers | ||||||
6352 | // is handled by the run-time. | ||||||
6353 | // | ||||||
6354 | // FIXME: If the function parameter is not the same type as the temporary, we | ||||||
6355 | // should still be able to elide the copy, but we don't have a way to | ||||||
6356 | // represent in the AST how much should be elided in this case. | ||||||
6357 | bool Elidable = | ||||||
6358 | CurInitExpr->isTemporaryObject(S.Context, Class) && | ||||||
6359 | S.Context.hasSameUnqualifiedType( | ||||||
6360 | Best->Function->getParamDecl(0)->getType().getNonReferenceType(), | ||||||
6361 | CurInitExpr->getType()); | ||||||
6362 | |||||||
6363 | // Actually perform the constructor call. | ||||||
6364 | CurInit = S.BuildCXXConstructExpr(Loc, T, Best->FoundDecl, Constructor, | ||||||
6365 | Elidable, | ||||||
6366 | ConstructorArgs, | ||||||
6367 | HadMultipleCandidates, | ||||||
6368 | /*ListInit*/ false, | ||||||
6369 | /*StdInitListInit*/ false, | ||||||
6370 | /*ZeroInit*/ false, | ||||||
6371 | CXXConstructExpr::CK_Complete, | ||||||
6372 | SourceRange()); | ||||||
6373 | |||||||
6374 | // If we're supposed to bind temporaries, do so. | ||||||
6375 | if (!CurInit.isInvalid() && shouldBindAsTemporary(Entity)) | ||||||
6376 | CurInit = S.MaybeBindToTemporary(CurInit.getAs<Expr>()); | ||||||
6377 | return CurInit; | ||||||
6378 | } | ||||||
6379 | |||||||
6380 | /// Check whether elidable copy construction for binding a reference to | ||||||
6381 | /// a temporary would have succeeded if we were building in C++98 mode, for | ||||||
6382 | /// -Wc++98-compat. | ||||||
6383 | static void CheckCXX98CompatAccessibleCopy(Sema &S, | ||||||
6384 | const InitializedEntity &Entity, | ||||||
6385 | Expr *CurInitExpr) { | ||||||
6386 | assert(S.getLangOpts().CPlusPlus11)(static_cast <bool> (S.getLangOpts().CPlusPlus11) ? void (0) : __assert_fail ("S.getLangOpts().CPlusPlus11", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6386, __extension__ __PRETTY_FUNCTION__)); | ||||||
6387 | |||||||
6388 | const RecordType *Record = CurInitExpr->getType()->getAs<RecordType>(); | ||||||
6389 | if (!Record) | ||||||
6390 | return; | ||||||
6391 | |||||||
6392 | SourceLocation Loc = getInitializationLoc(Entity, CurInitExpr); | ||||||
6393 | if (S.Diags.isIgnored(diag::warn_cxx98_compat_temp_copy, Loc)) | ||||||
6394 | return; | ||||||
6395 | |||||||
6396 | // Find constructors which would have been considered. | ||||||
6397 | OverloadCandidateSet CandidateSet(Loc, OverloadCandidateSet::CSK_Normal); | ||||||
6398 | DeclContext::lookup_result Ctors = | ||||||
6399 | S.LookupConstructors(cast<CXXRecordDecl>(Record->getDecl())); | ||||||
6400 | |||||||
6401 | // Perform overload resolution. | ||||||
6402 | OverloadCandidateSet::iterator Best; | ||||||
6403 | OverloadingResult OR = ResolveConstructorOverload( | ||||||
6404 | S, Loc, CurInitExpr, CandidateSet, CurInitExpr->getType(), Ctors, Best, | ||||||
6405 | /*CopyInitializing=*/false, /*AllowExplicit=*/true, | ||||||
6406 | /*OnlyListConstructors=*/false, /*IsListInit=*/false, | ||||||
6407 | /*SecondStepOfCopyInit=*/true); | ||||||
6408 | |||||||
6409 | PartialDiagnostic Diag = S.PDiag(diag::warn_cxx98_compat_temp_copy) | ||||||
6410 | << OR << (int)Entity.getKind() << CurInitExpr->getType() | ||||||
6411 | << CurInitExpr->getSourceRange(); | ||||||
6412 | |||||||
6413 | switch (OR) { | ||||||
6414 | case OR_Success: | ||||||
6415 | S.CheckConstructorAccess(Loc, cast<CXXConstructorDecl>(Best->Function), | ||||||
6416 | Best->FoundDecl, Entity, Diag); | ||||||
6417 | // FIXME: Check default arguments as far as that's possible. | ||||||
6418 | break; | ||||||
6419 | |||||||
6420 | case OR_No_Viable_Function: | ||||||
6421 | CandidateSet.NoteCandidates(PartialDiagnosticAt(Loc, Diag), S, | ||||||
6422 | OCD_AllCandidates, CurInitExpr); | ||||||
6423 | break; | ||||||
6424 | |||||||
6425 | case OR_Ambiguous: | ||||||
6426 | CandidateSet.NoteCandidates(PartialDiagnosticAt(Loc, Diag), S, | ||||||
6427 | OCD_AmbiguousCandidates, CurInitExpr); | ||||||
6428 | break; | ||||||
6429 | |||||||
6430 | case OR_Deleted: | ||||||
6431 | S.Diag(Loc, Diag); | ||||||
6432 | S.NoteDeletedFunction(Best->Function); | ||||||
6433 | break; | ||||||
6434 | } | ||||||
6435 | } | ||||||
6436 | |||||||
6437 | void InitializationSequence::PrintInitLocationNote(Sema &S, | ||||||
6438 | const InitializedEntity &Entity) { | ||||||
6439 | if (Entity.isParamOrTemplateParamKind() && Entity.getDecl()) { | ||||||
6440 | if (Entity.getDecl()->getLocation().isInvalid()) | ||||||
6441 | return; | ||||||
6442 | |||||||
6443 | if (Entity.getDecl()->getDeclName()) | ||||||
6444 | S.Diag(Entity.getDecl()->getLocation(), diag::note_parameter_named_here) | ||||||
6445 | << Entity.getDecl()->getDeclName(); | ||||||
6446 | else | ||||||
6447 | S.Diag(Entity.getDecl()->getLocation(), diag::note_parameter_here); | ||||||
6448 | } | ||||||
6449 | else if (Entity.getKind() == InitializedEntity::EK_RelatedResult && | ||||||
6450 | Entity.getMethodDecl()) | ||||||
6451 | S.Diag(Entity.getMethodDecl()->getLocation(), | ||||||
6452 | diag::note_method_return_type_change) | ||||||
6453 | << Entity.getMethodDecl()->getDeclName(); | ||||||
6454 | } | ||||||
6455 | |||||||
6456 | /// Returns true if the parameters describe a constructor initialization of | ||||||
6457 | /// an explicit temporary object, e.g. "Point(x, y)". | ||||||
6458 | static bool isExplicitTemporary(const InitializedEntity &Entity, | ||||||
6459 | const InitializationKind &Kind, | ||||||
6460 | unsigned NumArgs) { | ||||||
6461 | switch (Entity.getKind()) { | ||||||
6462 | case InitializedEntity::EK_Temporary: | ||||||
6463 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6464 | case InitializedEntity::EK_RelatedResult: | ||||||
6465 | break; | ||||||
6466 | default: | ||||||
6467 | return false; | ||||||
6468 | } | ||||||
6469 | |||||||
6470 | switch (Kind.getKind()) { | ||||||
6471 | case InitializationKind::IK_DirectList: | ||||||
6472 | return true; | ||||||
6473 | // FIXME: Hack to work around cast weirdness. | ||||||
6474 | case InitializationKind::IK_Direct: | ||||||
6475 | case InitializationKind::IK_Value: | ||||||
6476 | return NumArgs != 1; | ||||||
6477 | default: | ||||||
6478 | return false; | ||||||
6479 | } | ||||||
6480 | } | ||||||
6481 | |||||||
6482 | static ExprResult | ||||||
6483 | PerformConstructorInitialization(Sema &S, | ||||||
6484 | const InitializedEntity &Entity, | ||||||
6485 | const InitializationKind &Kind, | ||||||
6486 | MultiExprArg Args, | ||||||
6487 | const InitializationSequence::Step& Step, | ||||||
6488 | bool &ConstructorInitRequiresZeroInit, | ||||||
6489 | bool IsListInitialization, | ||||||
6490 | bool IsStdInitListInitialization, | ||||||
6491 | SourceLocation LBraceLoc, | ||||||
6492 | SourceLocation RBraceLoc) { | ||||||
6493 | unsigned NumArgs = Args.size(); | ||||||
6494 | CXXConstructorDecl *Constructor | ||||||
6495 | = cast<CXXConstructorDecl>(Step.Function.Function); | ||||||
6496 | bool HadMultipleCandidates = Step.Function.HadMultipleCandidates; | ||||||
6497 | |||||||
6498 | // Build a call to the selected constructor. | ||||||
6499 | SmallVector<Expr*, 8> ConstructorArgs; | ||||||
6500 | SourceLocation Loc = (Kind.isCopyInit() && Kind.getEqualLoc().isValid()) | ||||||
6501 | ? Kind.getEqualLoc() | ||||||
6502 | : Kind.getLocation(); | ||||||
6503 | |||||||
6504 | if (Kind.getKind() == InitializationKind::IK_Default) { | ||||||
6505 | // Force even a trivial, implicit default constructor to be | ||||||
6506 | // semantically checked. We do this explicitly because we don't build | ||||||
6507 | // the definition for completely trivial constructors. | ||||||
6508 | assert(Constructor->getParent() && "No parent class for constructor.")(static_cast <bool> (Constructor->getParent() && "No parent class for constructor.") ? void (0) : __assert_fail ("Constructor->getParent() && \"No parent class for constructor.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6508, __extension__ __PRETTY_FUNCTION__)); | ||||||
6509 | if (Constructor->isDefaulted() && Constructor->isDefaultConstructor() && | ||||||
6510 | Constructor->isTrivial() && !Constructor->isUsed(false)) { | ||||||
6511 | S.runWithSufficientStackSpace(Loc, [&] { | ||||||
6512 | S.DefineImplicitDefaultConstructor(Loc, Constructor); | ||||||
6513 | }); | ||||||
6514 | } | ||||||
6515 | } | ||||||
6516 | |||||||
6517 | ExprResult CurInit((Expr *)nullptr); | ||||||
6518 | |||||||
6519 | // C++ [over.match.copy]p1: | ||||||
6520 | // - When initializing a temporary to be bound to the first parameter | ||||||
6521 | // of a constructor that takes a reference to possibly cv-qualified | ||||||
6522 | // T as its first argument, called with a single argument in the | ||||||
6523 | // context of direct-initialization, explicit conversion functions | ||||||
6524 | // are also considered. | ||||||
6525 | bool AllowExplicitConv = | ||||||
6526 | Kind.AllowExplicit() && !Kind.isCopyInit() && Args.size() == 1 && | ||||||
6527 | hasCopyOrMoveCtorParam(S.Context, | ||||||
6528 | getConstructorInfo(Step.Function.FoundDecl)); | ||||||
6529 | |||||||
6530 | // Determine the arguments required to actually perform the constructor | ||||||
6531 | // call. | ||||||
6532 | if (S.CompleteConstructorCall(Constructor, Step.Type, Args, Loc, | ||||||
6533 | ConstructorArgs, AllowExplicitConv, | ||||||
6534 | IsListInitialization)) | ||||||
6535 | return ExprError(); | ||||||
6536 | |||||||
6537 | if (isExplicitTemporary(Entity, Kind, NumArgs)) { | ||||||
6538 | // An explicitly-constructed temporary, e.g., X(1, 2). | ||||||
6539 | if (S.DiagnoseUseOfDecl(Constructor, Loc)) | ||||||
6540 | return ExprError(); | ||||||
6541 | |||||||
6542 | TypeSourceInfo *TSInfo = Entity.getTypeSourceInfo(); | ||||||
6543 | if (!TSInfo) | ||||||
6544 | TSInfo = S.Context.getTrivialTypeSourceInfo(Entity.getType(), Loc); | ||||||
6545 | SourceRange ParenOrBraceRange = | ||||||
6546 | (Kind.getKind() == InitializationKind::IK_DirectList) | ||||||
6547 | ? SourceRange(LBraceLoc, RBraceLoc) | ||||||
6548 | : Kind.getParenOrBraceRange(); | ||||||
6549 | |||||||
6550 | CXXConstructorDecl *CalleeDecl = Constructor; | ||||||
6551 | if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>( | ||||||
6552 | Step.Function.FoundDecl.getDecl())) { | ||||||
6553 | CalleeDecl = S.findInheritingConstructor(Loc, Constructor, Shadow); | ||||||
6554 | if (S.DiagnoseUseOfDecl(CalleeDecl, Loc)) | ||||||
6555 | return ExprError(); | ||||||
6556 | } | ||||||
6557 | S.MarkFunctionReferenced(Loc, CalleeDecl); | ||||||
6558 | |||||||
6559 | CurInit = S.CheckForImmediateInvocation( | ||||||
6560 | CXXTemporaryObjectExpr::Create( | ||||||
6561 | S.Context, CalleeDecl, | ||||||
6562 | Entity.getType().getNonLValueExprType(S.Context), TSInfo, | ||||||
6563 | ConstructorArgs, ParenOrBraceRange, HadMultipleCandidates, | ||||||
6564 | IsListInitialization, IsStdInitListInitialization, | ||||||
6565 | ConstructorInitRequiresZeroInit), | ||||||
6566 | CalleeDecl); | ||||||
6567 | } else { | ||||||
6568 | CXXConstructExpr::ConstructionKind ConstructKind = | ||||||
6569 | CXXConstructExpr::CK_Complete; | ||||||
6570 | |||||||
6571 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||||
6572 | ConstructKind = Entity.getBaseSpecifier()->isVirtual() ? | ||||||
6573 | CXXConstructExpr::CK_VirtualBase : | ||||||
6574 | CXXConstructExpr::CK_NonVirtualBase; | ||||||
6575 | } else if (Entity.getKind() == InitializedEntity::EK_Delegating) { | ||||||
6576 | ConstructKind = CXXConstructExpr::CK_Delegating; | ||||||
6577 | } | ||||||
6578 | |||||||
6579 | // Only get the parenthesis or brace range if it is a list initialization or | ||||||
6580 | // direct construction. | ||||||
6581 | SourceRange ParenOrBraceRange; | ||||||
6582 | if (IsListInitialization) | ||||||
6583 | ParenOrBraceRange = SourceRange(LBraceLoc, RBraceLoc); | ||||||
6584 | else if (Kind.getKind() == InitializationKind::IK_Direct) | ||||||
6585 | ParenOrBraceRange = Kind.getParenOrBraceRange(); | ||||||
6586 | |||||||
6587 | // If the entity allows NRVO, mark the construction as elidable | ||||||
6588 | // unconditionally. | ||||||
6589 | if (Entity.allowsNRVO()) | ||||||
6590 | CurInit = S.BuildCXXConstructExpr(Loc, Step.Type, | ||||||
6591 | Step.Function.FoundDecl, | ||||||
6592 | Constructor, /*Elidable=*/true, | ||||||
6593 | ConstructorArgs, | ||||||
6594 | HadMultipleCandidates, | ||||||
6595 | IsListInitialization, | ||||||
6596 | IsStdInitListInitialization, | ||||||
6597 | ConstructorInitRequiresZeroInit, | ||||||
6598 | ConstructKind, | ||||||
6599 | ParenOrBraceRange); | ||||||
6600 | else | ||||||
6601 | CurInit = S.BuildCXXConstructExpr(Loc, Step.Type, | ||||||
6602 | Step.Function.FoundDecl, | ||||||
6603 | Constructor, | ||||||
6604 | ConstructorArgs, | ||||||
6605 | HadMultipleCandidates, | ||||||
6606 | IsListInitialization, | ||||||
6607 | IsStdInitListInitialization, | ||||||
6608 | ConstructorInitRequiresZeroInit, | ||||||
6609 | ConstructKind, | ||||||
6610 | ParenOrBraceRange); | ||||||
6611 | } | ||||||
6612 | if (CurInit.isInvalid()) | ||||||
6613 | return ExprError(); | ||||||
6614 | |||||||
6615 | // Only check access if all of that succeeded. | ||||||
6616 | S.CheckConstructorAccess(Loc, Constructor, Step.Function.FoundDecl, Entity); | ||||||
6617 | if (S.DiagnoseUseOfDecl(Step.Function.FoundDecl, Loc)) | ||||||
6618 | return ExprError(); | ||||||
6619 | |||||||
6620 | if (const ArrayType *AT = S.Context.getAsArrayType(Entity.getType())) | ||||||
6621 | if (checkDestructorReference(S.Context.getBaseElementType(AT), Loc, S)) | ||||||
6622 | return ExprError(); | ||||||
6623 | |||||||
6624 | if (shouldBindAsTemporary(Entity)) | ||||||
6625 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||||
6626 | |||||||
6627 | return CurInit; | ||||||
6628 | } | ||||||
6629 | |||||||
6630 | namespace { | ||||||
6631 | enum LifetimeKind { | ||||||
6632 | /// The lifetime of a temporary bound to this entity ends at the end of the | ||||||
6633 | /// full-expression, and that's (probably) fine. | ||||||
6634 | LK_FullExpression, | ||||||
6635 | |||||||
6636 | /// The lifetime of a temporary bound to this entity is extended to the | ||||||
6637 | /// lifeitme of the entity itself. | ||||||
6638 | LK_Extended, | ||||||
6639 | |||||||
6640 | /// The lifetime of a temporary bound to this entity probably ends too soon, | ||||||
6641 | /// because the entity is allocated in a new-expression. | ||||||
6642 | LK_New, | ||||||
6643 | |||||||
6644 | /// The lifetime of a temporary bound to this entity ends too soon, because | ||||||
6645 | /// the entity is a return object. | ||||||
6646 | LK_Return, | ||||||
6647 | |||||||
6648 | /// The lifetime of a temporary bound to this entity ends too soon, because | ||||||
6649 | /// the entity is the result of a statement expression. | ||||||
6650 | LK_StmtExprResult, | ||||||
6651 | |||||||
6652 | /// This is a mem-initializer: if it would extend a temporary (other than via | ||||||
6653 | /// a default member initializer), the program is ill-formed. | ||||||
6654 | LK_MemInitializer, | ||||||
6655 | }; | ||||||
6656 | using LifetimeResult = | ||||||
6657 | llvm::PointerIntPair<const InitializedEntity *, 3, LifetimeKind>; | ||||||
6658 | } | ||||||
6659 | |||||||
6660 | /// Determine the declaration which an initialized entity ultimately refers to, | ||||||
6661 | /// for the purpose of lifetime-extending a temporary bound to a reference in | ||||||
6662 | /// the initialization of \p Entity. | ||||||
6663 | static LifetimeResult getEntityLifetime( | ||||||
6664 | const InitializedEntity *Entity, | ||||||
6665 | const InitializedEntity *InitField = nullptr) { | ||||||
6666 | // C++11 [class.temporary]p5: | ||||||
6667 | switch (Entity->getKind()) { | ||||||
6668 | case InitializedEntity::EK_Variable: | ||||||
6669 | // The temporary [...] persists for the lifetime of the reference | ||||||
6670 | return {Entity, LK_Extended}; | ||||||
6671 | |||||||
6672 | case InitializedEntity::EK_Member: | ||||||
6673 | // For subobjects, we look at the complete object. | ||||||
6674 | if (Entity->getParent()) | ||||||
6675 | return getEntityLifetime(Entity->getParent(), Entity); | ||||||
6676 | |||||||
6677 | // except: | ||||||
6678 | // C++17 [class.base.init]p8: | ||||||
6679 | // A temporary expression bound to a reference member in a | ||||||
6680 | // mem-initializer is ill-formed. | ||||||
6681 | // C++17 [class.base.init]p11: | ||||||
6682 | // A temporary expression bound to a reference member from a | ||||||
6683 | // default member initializer is ill-formed. | ||||||
6684 | // | ||||||
6685 | // The context of p11 and its example suggest that it's only the use of a | ||||||
6686 | // default member initializer from a constructor that makes the program | ||||||
6687 | // ill-formed, not its mere existence, and that it can even be used by | ||||||
6688 | // aggregate initialization. | ||||||
6689 | return {Entity, Entity->isDefaultMemberInitializer() ? LK_Extended | ||||||
6690 | : LK_MemInitializer}; | ||||||
6691 | |||||||
6692 | case InitializedEntity::EK_Binding: | ||||||
6693 | // Per [dcl.decomp]p3, the binding is treated as a variable of reference | ||||||
6694 | // type. | ||||||
6695 | return {Entity, LK_Extended}; | ||||||
6696 | |||||||
6697 | case InitializedEntity::EK_Parameter: | ||||||
6698 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||||
6699 | // -- A temporary bound to a reference parameter in a function call | ||||||
6700 | // persists until the completion of the full-expression containing | ||||||
6701 | // the call. | ||||||
6702 | return {nullptr, LK_FullExpression}; | ||||||
6703 | |||||||
6704 | case InitializedEntity::EK_TemplateParameter: | ||||||
6705 | // FIXME: This will always be ill-formed; should we eagerly diagnose it here? | ||||||
6706 | return {nullptr, LK_FullExpression}; | ||||||
6707 | |||||||
6708 | case InitializedEntity::EK_Result: | ||||||
6709 | // -- The lifetime of a temporary bound to the returned value in a | ||||||
6710 | // function return statement is not extended; the temporary is | ||||||
6711 | // destroyed at the end of the full-expression in the return statement. | ||||||
6712 | return {nullptr, LK_Return}; | ||||||
6713 | |||||||
6714 | case InitializedEntity::EK_StmtExprResult: | ||||||
6715 | // FIXME: Should we lifetime-extend through the result of a statement | ||||||
6716 | // expression? | ||||||
6717 | return {nullptr, LK_StmtExprResult}; | ||||||
6718 | |||||||
6719 | case InitializedEntity::EK_New: | ||||||
6720 | // -- A temporary bound to a reference in a new-initializer persists | ||||||
6721 | // until the completion of the full-expression containing the | ||||||
6722 | // new-initializer. | ||||||
6723 | return {nullptr, LK_New}; | ||||||
6724 | |||||||
6725 | case InitializedEntity::EK_Temporary: | ||||||
6726 | case InitializedEntity::EK_CompoundLiteralInit: | ||||||
6727 | case InitializedEntity::EK_RelatedResult: | ||||||
6728 | // We don't yet know the storage duration of the surrounding temporary. | ||||||
6729 | // Assume it's got full-expression duration for now, it will patch up our | ||||||
6730 | // storage duration if that's not correct. | ||||||
6731 | return {nullptr, LK_FullExpression}; | ||||||
6732 | |||||||
6733 | case InitializedEntity::EK_ArrayElement: | ||||||
6734 | // For subobjects, we look at the complete object. | ||||||
6735 | return getEntityLifetime(Entity->getParent(), InitField); | ||||||
6736 | |||||||
6737 | case InitializedEntity::EK_Base: | ||||||
6738 | // For subobjects, we look at the complete object. | ||||||
6739 | if (Entity->getParent()) | ||||||
6740 | return getEntityLifetime(Entity->getParent(), InitField); | ||||||
6741 | return {InitField, LK_MemInitializer}; | ||||||
6742 | |||||||
6743 | case InitializedEntity::EK_Delegating: | ||||||
6744 | // We can reach this case for aggregate initialization in a constructor: | ||||||
6745 | // struct A { int &&r; }; | ||||||
6746 | // struct B : A { B() : A{0} {} }; | ||||||
6747 | // In this case, use the outermost field decl as the context. | ||||||
6748 | return {InitField, LK_MemInitializer}; | ||||||
6749 | |||||||
6750 | case InitializedEntity::EK_BlockElement: | ||||||
6751 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||||
6752 | case InitializedEntity::EK_LambdaCapture: | ||||||
6753 | case InitializedEntity::EK_VectorElement: | ||||||
6754 | case InitializedEntity::EK_ComplexElement: | ||||||
6755 | return {nullptr, LK_FullExpression}; | ||||||
6756 | |||||||
6757 | case InitializedEntity::EK_Exception: | ||||||
6758 | // FIXME: Can we diagnose lifetime problems with exceptions? | ||||||
6759 | return {nullptr, LK_FullExpression}; | ||||||
6760 | } | ||||||
6761 | llvm_unreachable("unknown entity kind")::llvm::llvm_unreachable_internal("unknown entity kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6761); | ||||||
6762 | } | ||||||
6763 | |||||||
6764 | namespace { | ||||||
6765 | enum ReferenceKind { | ||||||
6766 | /// Lifetime would be extended by a reference binding to a temporary. | ||||||
6767 | RK_ReferenceBinding, | ||||||
6768 | /// Lifetime would be extended by a std::initializer_list object binding to | ||||||
6769 | /// its backing array. | ||||||
6770 | RK_StdInitializerList, | ||||||
6771 | }; | ||||||
6772 | |||||||
6773 | /// A temporary or local variable. This will be one of: | ||||||
6774 | /// * A MaterializeTemporaryExpr. | ||||||
6775 | /// * A DeclRefExpr whose declaration is a local. | ||||||
6776 | /// * An AddrLabelExpr. | ||||||
6777 | /// * A BlockExpr for a block with captures. | ||||||
6778 | using Local = Expr*; | ||||||
6779 | |||||||
6780 | /// Expressions we stepped over when looking for the local state. Any steps | ||||||
6781 | /// that would inhibit lifetime extension or take us out of subexpressions of | ||||||
6782 | /// the initializer are included. | ||||||
6783 | struct IndirectLocalPathEntry { | ||||||
6784 | enum EntryKind { | ||||||
6785 | DefaultInit, | ||||||
6786 | AddressOf, | ||||||
6787 | VarInit, | ||||||
6788 | LValToRVal, | ||||||
6789 | LifetimeBoundCall, | ||||||
6790 | TemporaryCopy, | ||||||
6791 | LambdaCaptureInit, | ||||||
6792 | GslReferenceInit, | ||||||
6793 | GslPointerInit | ||||||
6794 | } Kind; | ||||||
6795 | Expr *E; | ||||||
6796 | union { | ||||||
6797 | const Decl *D = nullptr; | ||||||
6798 | const LambdaCapture *Capture; | ||||||
6799 | }; | ||||||
6800 | IndirectLocalPathEntry() {} | ||||||
6801 | IndirectLocalPathEntry(EntryKind K, Expr *E) : Kind(K), E(E) {} | ||||||
6802 | IndirectLocalPathEntry(EntryKind K, Expr *E, const Decl *D) | ||||||
6803 | : Kind(K), E(E), D(D) {} | ||||||
6804 | IndirectLocalPathEntry(EntryKind K, Expr *E, const LambdaCapture *Capture) | ||||||
6805 | : Kind(K), E(E), Capture(Capture) {} | ||||||
6806 | }; | ||||||
6807 | |||||||
6808 | using IndirectLocalPath = llvm::SmallVectorImpl<IndirectLocalPathEntry>; | ||||||
6809 | |||||||
6810 | struct RevertToOldSizeRAII { | ||||||
6811 | IndirectLocalPath &Path; | ||||||
6812 | unsigned OldSize = Path.size(); | ||||||
6813 | RevertToOldSizeRAII(IndirectLocalPath &Path) : Path(Path) {} | ||||||
6814 | ~RevertToOldSizeRAII() { Path.resize(OldSize); } | ||||||
6815 | }; | ||||||
6816 | |||||||
6817 | using LocalVisitor = llvm::function_ref<bool(IndirectLocalPath &Path, Local L, | ||||||
6818 | ReferenceKind RK)>; | ||||||
6819 | } | ||||||
6820 | |||||||
6821 | static bool isVarOnPath(IndirectLocalPath &Path, VarDecl *VD) { | ||||||
6822 | for (auto E : Path) | ||||||
6823 | if (E.Kind == IndirectLocalPathEntry::VarInit && E.D == VD) | ||||||
6824 | return true; | ||||||
6825 | return false; | ||||||
6826 | } | ||||||
6827 | |||||||
6828 | static bool pathContainsInit(IndirectLocalPath &Path) { | ||||||
6829 | return llvm::any_of(Path, [=](IndirectLocalPathEntry E) { | ||||||
6830 | return E.Kind == IndirectLocalPathEntry::DefaultInit || | ||||||
6831 | E.Kind == IndirectLocalPathEntry::VarInit; | ||||||
6832 | }); | ||||||
6833 | } | ||||||
6834 | |||||||
6835 | static void visitLocalsRetainedByInitializer(IndirectLocalPath &Path, | ||||||
6836 | Expr *Init, LocalVisitor Visit, | ||||||
6837 | bool RevisitSubinits, | ||||||
6838 | bool EnableLifetimeWarnings); | ||||||
6839 | |||||||
6840 | static void visitLocalsRetainedByReferenceBinding(IndirectLocalPath &Path, | ||||||
6841 | Expr *Init, ReferenceKind RK, | ||||||
6842 | LocalVisitor Visit, | ||||||
6843 | bool EnableLifetimeWarnings); | ||||||
6844 | |||||||
6845 | template <typename T> static bool isRecordWithAttr(QualType Type) { | ||||||
6846 | if (auto *RD = Type->getAsCXXRecordDecl()) | ||||||
6847 | return RD->hasAttr<T>(); | ||||||
6848 | return false; | ||||||
6849 | } | ||||||
6850 | |||||||
6851 | // Decl::isInStdNamespace will return false for iterators in some STL | ||||||
6852 | // implementations due to them being defined in a namespace outside of the std | ||||||
6853 | // namespace. | ||||||
6854 | static bool isInStlNamespace(const Decl *D) { | ||||||
6855 | const DeclContext *DC = D->getDeclContext(); | ||||||
6856 | if (!DC) | ||||||
6857 | return false; | ||||||
6858 | if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) | ||||||
6859 | if (const IdentifierInfo *II = ND->getIdentifier()) { | ||||||
6860 | StringRef Name = II->getName(); | ||||||
6861 | if (Name.size() >= 2 && Name.front() == '_' && | ||||||
6862 | (Name[1] == '_' || isUppercase(Name[1]))) | ||||||
6863 | return true; | ||||||
6864 | } | ||||||
6865 | |||||||
6866 | return DC->isStdNamespace(); | ||||||
6867 | } | ||||||
6868 | |||||||
6869 | static bool shouldTrackImplicitObjectArg(const CXXMethodDecl *Callee) { | ||||||
6870 | if (auto *Conv = dyn_cast_or_null<CXXConversionDecl>(Callee)) | ||||||
6871 | if (isRecordWithAttr<PointerAttr>(Conv->getConversionType())) | ||||||
6872 | return true; | ||||||
6873 | if (!isInStlNamespace(Callee->getParent())) | ||||||
6874 | return false; | ||||||
6875 | if (!isRecordWithAttr<PointerAttr>(Callee->getThisObjectType()) && | ||||||
6876 | !isRecordWithAttr<OwnerAttr>(Callee->getThisObjectType())) | ||||||
6877 | return false; | ||||||
6878 | if (Callee->getReturnType()->isPointerType() || | ||||||
6879 | isRecordWithAttr<PointerAttr>(Callee->getReturnType())) { | ||||||
6880 | if (!Callee->getIdentifier()) | ||||||
6881 | return false; | ||||||
6882 | return llvm::StringSwitch<bool>(Callee->getName()) | ||||||
6883 | .Cases("begin", "rbegin", "cbegin", "crbegin", true) | ||||||
6884 | .Cases("end", "rend", "cend", "crend", true) | ||||||
6885 | .Cases("c_str", "data", "get", true) | ||||||
6886 | // Map and set types. | ||||||
6887 | .Cases("find", "equal_range", "lower_bound", "upper_bound", true) | ||||||
6888 | .Default(false); | ||||||
6889 | } else if (Callee->getReturnType()->isReferenceType()) { | ||||||
6890 | if (!Callee->getIdentifier()) { | ||||||
6891 | auto OO = Callee->getOverloadedOperator(); | ||||||
6892 | return OO == OverloadedOperatorKind::OO_Subscript || | ||||||
6893 | OO == OverloadedOperatorKind::OO_Star; | ||||||
6894 | } | ||||||
6895 | return llvm::StringSwitch<bool>(Callee->getName()) | ||||||
6896 | .Cases("front", "back", "at", "top", "value", true) | ||||||
6897 | .Default(false); | ||||||
6898 | } | ||||||
6899 | return false; | ||||||
6900 | } | ||||||
6901 | |||||||
6902 | static bool shouldTrackFirstArgument(const FunctionDecl *FD) { | ||||||
6903 | if (!FD->getIdentifier() || FD->getNumParams() != 1) | ||||||
6904 | return false; | ||||||
6905 | const auto *RD = FD->getParamDecl(0)->getType()->getPointeeCXXRecordDecl(); | ||||||
6906 | if (!FD->isInStdNamespace() || !RD || !RD->isInStdNamespace()) | ||||||
6907 | return false; | ||||||
6908 | if (!isRecordWithAttr<PointerAttr>(QualType(RD->getTypeForDecl(), 0)) && | ||||||
6909 | !isRecordWithAttr<OwnerAttr>(QualType(RD->getTypeForDecl(), 0))) | ||||||
6910 | return false; | ||||||
6911 | if (FD->getReturnType()->isPointerType() || | ||||||
6912 | isRecordWithAttr<PointerAttr>(FD->getReturnType())) { | ||||||
6913 | return llvm::StringSwitch<bool>(FD->getName()) | ||||||
6914 | .Cases("begin", "rbegin", "cbegin", "crbegin", true) | ||||||
6915 | .Cases("end", "rend", "cend", "crend", true) | ||||||
6916 | .Case("data", true) | ||||||
6917 | .Default(false); | ||||||
6918 | } else if (FD->getReturnType()->isReferenceType()) { | ||||||
6919 | return llvm::StringSwitch<bool>(FD->getName()) | ||||||
6920 | .Cases("get", "any_cast", true) | ||||||
6921 | .Default(false); | ||||||
6922 | } | ||||||
6923 | return false; | ||||||
6924 | } | ||||||
6925 | |||||||
6926 | static void handleGslAnnotatedTypes(IndirectLocalPath &Path, Expr *Call, | ||||||
6927 | LocalVisitor Visit) { | ||||||
6928 | auto VisitPointerArg = [&](const Decl *D, Expr *Arg, bool Value) { | ||||||
6929 | // We are not interested in the temporary base objects of gsl Pointers: | ||||||
6930 | // Temp().ptr; // Here ptr might not dangle. | ||||||
6931 | if (isa<MemberExpr>(Arg->IgnoreImpCasts())) | ||||||
6932 | return; | ||||||
6933 | // Once we initialized a value with a reference, it can no longer dangle. | ||||||
6934 | if (!Value) { | ||||||
6935 | for (auto It = Path.rbegin(), End = Path.rend(); It != End; ++It) { | ||||||
6936 | if (It->Kind == IndirectLocalPathEntry::GslReferenceInit) | ||||||
6937 | continue; | ||||||
6938 | if (It->Kind == IndirectLocalPathEntry::GslPointerInit) | ||||||
6939 | return; | ||||||
6940 | break; | ||||||
6941 | } | ||||||
6942 | } | ||||||
6943 | Path.push_back({Value ? IndirectLocalPathEntry::GslPointerInit | ||||||
6944 | : IndirectLocalPathEntry::GslReferenceInit, | ||||||
6945 | Arg, D}); | ||||||
6946 | if (Arg->isGLValue()) | ||||||
6947 | visitLocalsRetainedByReferenceBinding(Path, Arg, RK_ReferenceBinding, | ||||||
6948 | Visit, | ||||||
6949 | /*EnableLifetimeWarnings=*/true); | ||||||
6950 | else | ||||||
6951 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||||
6952 | /*EnableLifetimeWarnings=*/true); | ||||||
6953 | Path.pop_back(); | ||||||
6954 | }; | ||||||
6955 | |||||||
6956 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(Call)) { | ||||||
6957 | const auto *MD = cast_or_null<CXXMethodDecl>(MCE->getDirectCallee()); | ||||||
6958 | if (MD && shouldTrackImplicitObjectArg(MD)) | ||||||
6959 | VisitPointerArg(MD, MCE->getImplicitObjectArgument(), | ||||||
6960 | !MD->getReturnType()->isReferenceType()); | ||||||
6961 | return; | ||||||
6962 | } else if (auto *OCE = dyn_cast<CXXOperatorCallExpr>(Call)) { | ||||||
6963 | FunctionDecl *Callee = OCE->getDirectCallee(); | ||||||
6964 | if (Callee && Callee->isCXXInstanceMember() && | ||||||
6965 | shouldTrackImplicitObjectArg(cast<CXXMethodDecl>(Callee))) | ||||||
6966 | VisitPointerArg(Callee, OCE->getArg(0), | ||||||
6967 | !Callee->getReturnType()->isReferenceType()); | ||||||
6968 | return; | ||||||
6969 | } else if (auto *CE = dyn_cast<CallExpr>(Call)) { | ||||||
6970 | FunctionDecl *Callee = CE->getDirectCallee(); | ||||||
6971 | if (Callee && shouldTrackFirstArgument(Callee)) | ||||||
6972 | VisitPointerArg(Callee, CE->getArg(0), | ||||||
6973 | !Callee->getReturnType()->isReferenceType()); | ||||||
6974 | return; | ||||||
6975 | } | ||||||
6976 | |||||||
6977 | if (auto *CCE = dyn_cast<CXXConstructExpr>(Call)) { | ||||||
6978 | const auto *Ctor = CCE->getConstructor(); | ||||||
6979 | const CXXRecordDecl *RD = Ctor->getParent(); | ||||||
6980 | if (CCE->getNumArgs() > 0 && RD->hasAttr<PointerAttr>()) | ||||||
6981 | VisitPointerArg(Ctor->getParamDecl(0), CCE->getArgs()[0], true); | ||||||
6982 | } | ||||||
6983 | } | ||||||
6984 | |||||||
6985 | static bool implicitObjectParamIsLifetimeBound(const FunctionDecl *FD) { | ||||||
6986 | const TypeSourceInfo *TSI = FD->getTypeSourceInfo(); | ||||||
6987 | if (!TSI) | ||||||
6988 | return false; | ||||||
6989 | // Don't declare this variable in the second operand of the for-statement; | ||||||
6990 | // GCC miscompiles that by ending its lifetime before evaluating the | ||||||
6991 | // third operand. See gcc.gnu.org/PR86769. | ||||||
6992 | AttributedTypeLoc ATL; | ||||||
6993 | for (TypeLoc TL = TSI->getTypeLoc(); | ||||||
6994 | (ATL = TL.getAsAdjusted<AttributedTypeLoc>()); | ||||||
6995 | TL = ATL.getModifiedLoc()) { | ||||||
6996 | if (ATL.getAttrAs<LifetimeBoundAttr>()) | ||||||
6997 | return true; | ||||||
6998 | } | ||||||
6999 | |||||||
7000 | // Assume that all assignment operators with a "normal" return type return | ||||||
7001 | // *this, that is, an lvalue reference that is the same type as the implicit | ||||||
7002 | // object parameter (or the LHS for a non-member operator$=). | ||||||
7003 | OverloadedOperatorKind OO = FD->getDeclName().getCXXOverloadedOperator(); | ||||||
7004 | if (OO == OO_Equal || isCompoundAssignmentOperator(OO)) { | ||||||
7005 | QualType RetT = FD->getReturnType(); | ||||||
7006 | if (RetT->isLValueReferenceType()) { | ||||||
7007 | ASTContext &Ctx = FD->getASTContext(); | ||||||
7008 | QualType LHST; | ||||||
7009 | auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
7010 | if (MD
| ||||||
7011 | LHST = Ctx.getLValueReferenceType(MD->getThisObjectType()); | ||||||
7012 | else | ||||||
7013 | LHST = MD->getParamDecl(0)->getType(); | ||||||
| |||||||
7014 | if (Ctx.hasSameType(RetT, LHST)) | ||||||
7015 | return true; | ||||||
7016 | } | ||||||
7017 | } | ||||||
7018 | |||||||
7019 | return false; | ||||||
7020 | } | ||||||
7021 | |||||||
7022 | static void visitLifetimeBoundArguments(IndirectLocalPath &Path, Expr *Call, | ||||||
7023 | LocalVisitor Visit) { | ||||||
7024 | const FunctionDecl *Callee; | ||||||
7025 | ArrayRef<Expr*> Args; | ||||||
7026 | |||||||
7027 | if (auto *CE
| ||||||
7028 | Callee = CE->getDirectCallee(); | ||||||
7029 | Args = llvm::makeArrayRef(CE->getArgs(), CE->getNumArgs()); | ||||||
7030 | } else { | ||||||
7031 | auto *CCE = cast<CXXConstructExpr>(Call); | ||||||
7032 | Callee = CCE->getConstructor(); | ||||||
7033 | Args = llvm::makeArrayRef(CCE->getArgs(), CCE->getNumArgs()); | ||||||
7034 | } | ||||||
7035 | if (!Callee
| ||||||
7036 | return; | ||||||
7037 | |||||||
7038 | Expr *ObjectArg = nullptr; | ||||||
7039 | if (isa<CXXOperatorCallExpr>(Call) && Callee->isCXXInstanceMember()) { | ||||||
7040 | ObjectArg = Args[0]; | ||||||
7041 | Args = Args.slice(1); | ||||||
7042 | } else if (auto *MCE
| ||||||
7043 | ObjectArg = MCE->getImplicitObjectArgument(); | ||||||
7044 | } | ||||||
7045 | |||||||
7046 | auto VisitLifetimeBoundArg = [&](const Decl *D, Expr *Arg) { | ||||||
7047 | Path.push_back({IndirectLocalPathEntry::LifetimeBoundCall, Arg, D}); | ||||||
7048 | if (Arg->isGLValue()) | ||||||
7049 | visitLocalsRetainedByReferenceBinding(Path, Arg, RK_ReferenceBinding, | ||||||
7050 | Visit, | ||||||
7051 | /*EnableLifetimeWarnings=*/false); | ||||||
7052 | else | ||||||
7053 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||||
7054 | /*EnableLifetimeWarnings=*/false); | ||||||
7055 | Path.pop_back(); | ||||||
7056 | }; | ||||||
7057 | |||||||
7058 | if (ObjectArg && implicitObjectParamIsLifetimeBound(Callee)) | ||||||
7059 | VisitLifetimeBoundArg(Callee, ObjectArg); | ||||||
7060 | |||||||
7061 | for (unsigned I = 0, | ||||||
7062 | N = std::min<unsigned>(Callee->getNumParams(), Args.size()); | ||||||
7063 | I != N; ++I) { | ||||||
7064 | if (Callee->getParamDecl(I)->hasAttr<LifetimeBoundAttr>()) | ||||||
7065 | VisitLifetimeBoundArg(Callee->getParamDecl(I), Args[I]); | ||||||
7066 | } | ||||||
7067 | } | ||||||
7068 | |||||||
7069 | /// Visit the locals that would be reachable through a reference bound to the | ||||||
7070 | /// glvalue expression \c Init. | ||||||
7071 | static void visitLocalsRetainedByReferenceBinding(IndirectLocalPath &Path, | ||||||
7072 | Expr *Init, ReferenceKind RK, | ||||||
7073 | LocalVisitor Visit, | ||||||
7074 | bool EnableLifetimeWarnings) { | ||||||
7075 | RevertToOldSizeRAII RAII(Path); | ||||||
7076 | |||||||
7077 | // Walk past any constructs which we can lifetime-extend across. | ||||||
7078 | Expr *Old; | ||||||
7079 | do { | ||||||
7080 | Old = Init; | ||||||
7081 | |||||||
7082 | if (auto *FE = dyn_cast<FullExpr>(Init)) | ||||||
7083 | Init = FE->getSubExpr(); | ||||||
7084 | |||||||
7085 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { | ||||||
7086 | // If this is just redundant braces around an initializer, step over it. | ||||||
7087 | if (ILE->isTransparent()) | ||||||
7088 | Init = ILE->getInit(0); | ||||||
7089 | } | ||||||
7090 | |||||||
7091 | // Step over any subobject adjustments; we may have a materialized | ||||||
7092 | // temporary inside them. | ||||||
7093 | Init = const_cast<Expr *>(Init->skipRValueSubobjectAdjustments()); | ||||||
7094 | |||||||
7095 | // Per current approach for DR1376, look through casts to reference type | ||||||
7096 | // when performing lifetime extension. | ||||||
7097 | if (CastExpr *CE = dyn_cast<CastExpr>(Init)) | ||||||
7098 | if (CE->getSubExpr()->isGLValue()) | ||||||
7099 | Init = CE->getSubExpr(); | ||||||
7100 | |||||||
7101 | // Per the current approach for DR1299, look through array element access | ||||||
7102 | // on array glvalues when performing lifetime extension. | ||||||
7103 | if (auto *ASE = dyn_cast<ArraySubscriptExpr>(Init)) { | ||||||
7104 | Init = ASE->getBase(); | ||||||
7105 | auto *ICE = dyn_cast<ImplicitCastExpr>(Init); | ||||||
7106 | if (ICE && ICE->getCastKind() == CK_ArrayToPointerDecay) | ||||||
7107 | Init = ICE->getSubExpr(); | ||||||
7108 | else | ||||||
7109 | // We can't lifetime extend through this but we might still find some | ||||||
7110 | // retained temporaries. | ||||||
7111 | return visitLocalsRetainedByInitializer(Path, Init, Visit, true, | ||||||
7112 | EnableLifetimeWarnings); | ||||||
7113 | } | ||||||
7114 | |||||||
7115 | // Step into CXXDefaultInitExprs so we can diagnose cases where a | ||||||
7116 | // constructor inherits one as an implicit mem-initializer. | ||||||
7117 | if (auto *DIE = dyn_cast<CXXDefaultInitExpr>(Init)) { | ||||||
7118 | Path.push_back( | ||||||
7119 | {IndirectLocalPathEntry::DefaultInit, DIE, DIE->getField()}); | ||||||
7120 | Init = DIE->getExpr(); | ||||||
7121 | } | ||||||
7122 | } while (Init != Old); | ||||||
7123 | |||||||
7124 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(Init)) { | ||||||
7125 | if (Visit(Path, Local(MTE), RK)) | ||||||
7126 | visitLocalsRetainedByInitializer(Path, MTE->getSubExpr(), Visit, true, | ||||||
7127 | EnableLifetimeWarnings); | ||||||
7128 | } | ||||||
7129 | |||||||
7130 | if (isa<CallExpr>(Init)) { | ||||||
7131 | if (EnableLifetimeWarnings) | ||||||
7132 | handleGslAnnotatedTypes(Path, Init, Visit); | ||||||
7133 | return visitLifetimeBoundArguments(Path, Init, Visit); | ||||||
7134 | } | ||||||
7135 | |||||||
7136 | switch (Init->getStmtClass()) { | ||||||
7137 | case Stmt::DeclRefExprClass: { | ||||||
7138 | // If we find the name of a local non-reference parameter, we could have a | ||||||
7139 | // lifetime problem. | ||||||
7140 | auto *DRE = cast<DeclRefExpr>(Init); | ||||||
7141 | auto *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||||
7142 | if (VD && VD->hasLocalStorage() && | ||||||
7143 | !DRE->refersToEnclosingVariableOrCapture()) { | ||||||
7144 | if (!VD->getType()->isReferenceType()) { | ||||||
7145 | Visit(Path, Local(DRE), RK); | ||||||
7146 | } else if (isa<ParmVarDecl>(DRE->getDecl())) { | ||||||
7147 | // The lifetime of a reference parameter is unknown; assume it's OK | ||||||
7148 | // for now. | ||||||
7149 | break; | ||||||
7150 | } else if (VD->getInit() && !isVarOnPath(Path, VD)) { | ||||||
7151 | Path.push_back({IndirectLocalPathEntry::VarInit, DRE, VD}); | ||||||
7152 | visitLocalsRetainedByReferenceBinding(Path, VD->getInit(), | ||||||
7153 | RK_ReferenceBinding, Visit, | ||||||
7154 | EnableLifetimeWarnings); | ||||||
7155 | } | ||||||
7156 | } | ||||||
7157 | break; | ||||||
7158 | } | ||||||
7159 | |||||||
7160 | case Stmt::UnaryOperatorClass: { | ||||||
7161 | // The only unary operator that make sense to handle here | ||||||
7162 | // is Deref. All others don't resolve to a "name." This includes | ||||||
7163 | // handling all sorts of rvalues passed to a unary operator. | ||||||
7164 | const UnaryOperator *U = cast<UnaryOperator>(Init); | ||||||
7165 | if (U->getOpcode() == UO_Deref) | ||||||
7166 | visitLocalsRetainedByInitializer(Path, U->getSubExpr(), Visit, true, | ||||||
7167 | EnableLifetimeWarnings); | ||||||
7168 | break; | ||||||
7169 | } | ||||||
7170 | |||||||
7171 | case Stmt::OMPArraySectionExprClass: { | ||||||
7172 | visitLocalsRetainedByInitializer(Path, | ||||||
7173 | cast<OMPArraySectionExpr>(Init)->getBase(), | ||||||
7174 | Visit, true, EnableLifetimeWarnings); | ||||||
7175 | break; | ||||||
7176 | } | ||||||
7177 | |||||||
7178 | case Stmt::ConditionalOperatorClass: | ||||||
7179 | case Stmt::BinaryConditionalOperatorClass: { | ||||||
7180 | auto *C = cast<AbstractConditionalOperator>(Init); | ||||||
7181 | if (!C->getTrueExpr()->getType()->isVoidType()) | ||||||
7182 | visitLocalsRetainedByReferenceBinding(Path, C->getTrueExpr(), RK, Visit, | ||||||
7183 | EnableLifetimeWarnings); | ||||||
7184 | if (!C->getFalseExpr()->getType()->isVoidType()) | ||||||
7185 | visitLocalsRetainedByReferenceBinding(Path, C->getFalseExpr(), RK, Visit, | ||||||
7186 | EnableLifetimeWarnings); | ||||||
7187 | break; | ||||||
7188 | } | ||||||
7189 | |||||||
7190 | // FIXME: Visit the left-hand side of an -> or ->*. | ||||||
7191 | |||||||
7192 | default: | ||||||
7193 | break; | ||||||
7194 | } | ||||||
7195 | } | ||||||
7196 | |||||||
7197 | /// Visit the locals that would be reachable through an object initialized by | ||||||
7198 | /// the prvalue expression \c Init. | ||||||
7199 | static void visitLocalsRetainedByInitializer(IndirectLocalPath &Path, | ||||||
7200 | Expr *Init, LocalVisitor Visit, | ||||||
7201 | bool RevisitSubinits, | ||||||
7202 | bool EnableLifetimeWarnings) { | ||||||
7203 | RevertToOldSizeRAII RAII(Path); | ||||||
7204 | |||||||
7205 | Expr *Old; | ||||||
7206 | do { | ||||||
7207 | Old = Init; | ||||||
7208 | |||||||
7209 | // Step into CXXDefaultInitExprs so we can diagnose cases where a | ||||||
7210 | // constructor inherits one as an implicit mem-initializer. | ||||||
7211 | if (auto *DIE
| ||||||
| |||||||
7212 | Path.push_back({IndirectLocalPathEntry::DefaultInit, DIE, DIE->getField()}); | ||||||
7213 | Init = DIE->getExpr(); | ||||||
7214 | } | ||||||
7215 | |||||||
7216 | if (auto *FE
| ||||||
7217 | Init = FE->getSubExpr(); | ||||||
7218 | |||||||
7219 | // Dig out the expression which constructs the extended temporary. | ||||||
7220 | Init = const_cast<Expr *>(Init->skipRValueSubobjectAdjustments()); | ||||||
7221 | |||||||
7222 | if (CXXBindTemporaryExpr *BTE
| ||||||
7223 | Init = BTE->getSubExpr(); | ||||||
7224 | |||||||
7225 | Init = Init->IgnoreParens(); | ||||||
7226 | |||||||
7227 | // Step over value-preserving rvalue casts. | ||||||
7228 | if (auto *CE
| ||||||
7229 | switch (CE->getCastKind()) { | ||||||
7230 | case CK_LValueToRValue: | ||||||
7231 | // If we can match the lvalue to a const object, we can look at its | ||||||
7232 | // initializer. | ||||||
7233 | Path.push_back({IndirectLocalPathEntry::LValToRVal, CE}); | ||||||
7234 | return visitLocalsRetainedByReferenceBinding( | ||||||
7235 | Path, Init, RK_ReferenceBinding, | ||||||
7236 | [&](IndirectLocalPath &Path, Local L, ReferenceKind RK) -> bool { | ||||||
7237 | if (auto *DRE = dyn_cast<DeclRefExpr>(L)) { | ||||||
7238 | auto *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||||
7239 | if (VD && VD->getType().isConstQualified() && VD->getInit() && | ||||||
7240 | !isVarOnPath(Path, VD)) { | ||||||
7241 | Path.push_back({IndirectLocalPathEntry::VarInit, DRE, VD}); | ||||||
7242 | visitLocalsRetainedByInitializer(Path, VD->getInit(), Visit, true, | ||||||
7243 | EnableLifetimeWarnings); | ||||||
7244 | } | ||||||
7245 | } else if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(L)) { | ||||||
7246 | if (MTE->getType().isConstQualified()) | ||||||
7247 | visitLocalsRetainedByInitializer(Path, MTE->getSubExpr(), Visit, | ||||||
7248 | true, EnableLifetimeWarnings); | ||||||
7249 | } | ||||||
7250 | return false; | ||||||
7251 | }, EnableLifetimeWarnings); | ||||||
7252 | |||||||
7253 | // We assume that objects can be retained by pointers cast to integers, | ||||||
7254 | // but not if the integer is cast to floating-point type or to _Complex. | ||||||
7255 | // We assume that casts to 'bool' do not preserve enough information to | ||||||
7256 | // retain a local object. | ||||||
7257 | case CK_NoOp: | ||||||
7258 | case CK_BitCast: | ||||||
7259 | case CK_BaseToDerived: | ||||||
7260 | case CK_DerivedToBase: | ||||||
7261 | case CK_UncheckedDerivedToBase: | ||||||
7262 | case CK_Dynamic: | ||||||
7263 | case CK_ToUnion: | ||||||
7264 | case CK_UserDefinedConversion: | ||||||
7265 | case CK_ConstructorConversion: | ||||||
7266 | case CK_IntegralToPointer: | ||||||
7267 | case CK_PointerToIntegral: | ||||||
7268 | case CK_VectorSplat: | ||||||
7269 | case CK_IntegralCast: | ||||||
7270 | case CK_CPointerToObjCPointerCast: | ||||||
7271 | case CK_BlockPointerToObjCPointerCast: | ||||||
7272 | case CK_AnyPointerToBlockPointerCast: | ||||||
7273 | case CK_AddressSpaceConversion: | ||||||
7274 | break; | ||||||
7275 | |||||||
7276 | case CK_ArrayToPointerDecay: | ||||||
7277 | // Model array-to-pointer decay as taking the address of the array | ||||||
7278 | // lvalue. | ||||||
7279 | Path.push_back({IndirectLocalPathEntry::AddressOf, CE}); | ||||||
7280 | return visitLocalsRetainedByReferenceBinding(Path, CE->getSubExpr(), | ||||||
7281 | RK_ReferenceBinding, Visit, | ||||||
7282 | EnableLifetimeWarnings); | ||||||
7283 | |||||||
7284 | default: | ||||||
7285 | return; | ||||||
7286 | } | ||||||
7287 | |||||||
7288 | Init = CE->getSubExpr(); | ||||||
7289 | } | ||||||
7290 | } while (Old != Init); | ||||||
7291 | |||||||
7292 | // C++17 [dcl.init.list]p6: | ||||||
7293 | // initializing an initializer_list object from the array extends the | ||||||
7294 | // lifetime of the array exactly like binding a reference to a temporary. | ||||||
7295 | if (auto *ILE
| ||||||
7296 | return visitLocalsRetainedByReferenceBinding(Path, ILE->getSubExpr(), | ||||||
7297 | RK_StdInitializerList, Visit, | ||||||
7298 | EnableLifetimeWarnings); | ||||||
7299 | |||||||
7300 | if (InitListExpr *ILE
| ||||||
7301 | // We already visited the elements of this initializer list while | ||||||
7302 | // performing the initialization. Don't visit them again unless we've | ||||||
7303 | // changed the lifetime of the initialized entity. | ||||||
7304 | if (!RevisitSubinits) | ||||||
7305 | return; | ||||||
7306 | |||||||
7307 | if (ILE->isTransparent()) | ||||||
7308 | return visitLocalsRetainedByInitializer(Path, ILE->getInit(0), Visit, | ||||||
7309 | RevisitSubinits, | ||||||
7310 | EnableLifetimeWarnings); | ||||||
7311 | |||||||
7312 | if (ILE->getType()->isArrayType()) { | ||||||
7313 | for (unsigned I = 0, N = ILE->getNumInits(); I != N; ++I) | ||||||
7314 | visitLocalsRetainedByInitializer(Path, ILE->getInit(I), Visit, | ||||||
7315 | RevisitSubinits, | ||||||
7316 | EnableLifetimeWarnings); | ||||||
7317 | return; | ||||||
7318 | } | ||||||
7319 | |||||||
7320 | if (CXXRecordDecl *RD = ILE->getType()->getAsCXXRecordDecl()) { | ||||||
7321 | assert(RD->isAggregate() && "aggregate init on non-aggregate")(static_cast <bool> (RD->isAggregate() && "aggregate init on non-aggregate" ) ? void (0) : __assert_fail ("RD->isAggregate() && \"aggregate init on non-aggregate\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7321, __extension__ __PRETTY_FUNCTION__)); | ||||||
7322 | |||||||
7323 | // If we lifetime-extend a braced initializer which is initializing an | ||||||
7324 | // aggregate, and that aggregate contains reference members which are | ||||||
7325 | // bound to temporaries, those temporaries are also lifetime-extended. | ||||||
7326 | if (RD->isUnion() && ILE->getInitializedFieldInUnion() && | ||||||
7327 | ILE->getInitializedFieldInUnion()->getType()->isReferenceType()) | ||||||
7328 | visitLocalsRetainedByReferenceBinding(Path, ILE->getInit(0), | ||||||
7329 | RK_ReferenceBinding, Visit, | ||||||
7330 | EnableLifetimeWarnings); | ||||||
7331 | else { | ||||||
7332 | unsigned Index = 0; | ||||||
7333 | for (; Index < RD->getNumBases() && Index < ILE->getNumInits(); ++Index) | ||||||
7334 | visitLocalsRetainedByInitializer(Path, ILE->getInit(Index), Visit, | ||||||
7335 | RevisitSubinits, | ||||||
7336 | EnableLifetimeWarnings); | ||||||
7337 | for (const auto *I : RD->fields()) { | ||||||
7338 | if (Index >= ILE->getNumInits()) | ||||||
7339 | break; | ||||||
7340 | if (I->isUnnamedBitfield()) | ||||||
7341 | continue; | ||||||
7342 | Expr *SubInit = ILE->getInit(Index); | ||||||
7343 | if (I->getType()->isReferenceType()) | ||||||
7344 | visitLocalsRetainedByReferenceBinding(Path, SubInit, | ||||||
7345 | RK_ReferenceBinding, Visit, | ||||||
7346 | EnableLifetimeWarnings); | ||||||
7347 | else | ||||||
7348 | // This might be either aggregate-initialization of a member or | ||||||
7349 | // initialization of a std::initializer_list object. Regardless, | ||||||
7350 | // we should recursively lifetime-extend that initializer. | ||||||
7351 | visitLocalsRetainedByInitializer(Path, SubInit, Visit, | ||||||
7352 | RevisitSubinits, | ||||||
7353 | EnableLifetimeWarnings); | ||||||
7354 | ++Index; | ||||||
7355 | } | ||||||
7356 | } | ||||||
7357 | } | ||||||
7358 | return; | ||||||
7359 | } | ||||||
7360 | |||||||
7361 | // The lifetime of an init-capture is that of the closure object constructed | ||||||
7362 | // by a lambda-expression. | ||||||
7363 | if (auto *LE
| ||||||
7364 | LambdaExpr::capture_iterator CapI = LE->capture_begin(); | ||||||
7365 | for (Expr *E : LE->capture_inits()) { | ||||||
7366 | assert(CapI != LE->capture_end())(static_cast <bool> (CapI != LE->capture_end()) ? void (0) : __assert_fail ("CapI != LE->capture_end()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7366, __extension__ __PRETTY_FUNCTION__)); | ||||||
7367 | const LambdaCapture &Cap = *CapI++; | ||||||
7368 | if (!E) | ||||||
7369 | continue; | ||||||
7370 | if (Cap.capturesVariable()) | ||||||
7371 | Path.push_back({IndirectLocalPathEntry::LambdaCaptureInit, E, &Cap}); | ||||||
7372 | if (E->isGLValue()) | ||||||
7373 | visitLocalsRetainedByReferenceBinding(Path, E, RK_ReferenceBinding, | ||||||
7374 | Visit, EnableLifetimeWarnings); | ||||||
7375 | else | ||||||
7376 | visitLocalsRetainedByInitializer(Path, E, Visit, true, | ||||||
7377 | EnableLifetimeWarnings); | ||||||
7378 | if (Cap.capturesVariable()) | ||||||
7379 | Path.pop_back(); | ||||||
7380 | } | ||||||
7381 | } | ||||||
7382 | |||||||
7383 | // Assume that a copy or move from a temporary references the same objects | ||||||
7384 | // that the temporary does. | ||||||
7385 | if (auto *CCE
| ||||||
7386 | if (CCE->getConstructor()->isCopyOrMoveConstructor()) { | ||||||
7387 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(CCE->getArg(0))) { | ||||||
7388 | Expr *Arg = MTE->getSubExpr(); | ||||||
7389 | Path.push_back({IndirectLocalPathEntry::TemporaryCopy, Arg, | ||||||
7390 | CCE->getConstructor()}); | ||||||
7391 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||||
7392 | /*EnableLifetimeWarnings*/false); | ||||||
7393 | Path.pop_back(); | ||||||
7394 | } | ||||||
7395 | } | ||||||
7396 | } | ||||||
7397 | |||||||
7398 | if (isa<CallExpr>(Init) || isa<CXXConstructExpr>(Init)) { | ||||||
7399 | if (EnableLifetimeWarnings) | ||||||
7400 | handleGslAnnotatedTypes(Path, Init, Visit); | ||||||
7401 | return visitLifetimeBoundArguments(Path, Init, Visit); | ||||||
7402 | } | ||||||
7403 | |||||||
7404 | switch (Init->getStmtClass()) { | ||||||
7405 | case Stmt::UnaryOperatorClass: { | ||||||
7406 | auto *UO = cast<UnaryOperator>(Init); | ||||||
7407 | // If the initializer is the address of a local, we could have a lifetime | ||||||
7408 | // problem. | ||||||
7409 | if (UO->getOpcode() == UO_AddrOf) { | ||||||
7410 | // If this is &rvalue, then it's ill-formed and we have already diagnosed | ||||||
7411 | // it. Don't produce a redundant warning about the lifetime of the | ||||||
7412 | // temporary. | ||||||
7413 | if (isa<MaterializeTemporaryExpr>(UO->getSubExpr())) | ||||||
7414 | return; | ||||||
7415 | |||||||
7416 | Path.push_back({IndirectLocalPathEntry::AddressOf, UO}); | ||||||
7417 | visitLocalsRetainedByReferenceBinding(Path, UO->getSubExpr(), | ||||||
7418 | RK_ReferenceBinding, Visit, | ||||||
7419 | EnableLifetimeWarnings); | ||||||
7420 | } | ||||||
7421 | break; | ||||||
7422 | } | ||||||
7423 | |||||||
7424 | case Stmt::BinaryOperatorClass: { | ||||||
7425 | // Handle pointer arithmetic. | ||||||
7426 | auto *BO = cast<BinaryOperator>(Init); | ||||||
7427 | BinaryOperatorKind BOK = BO->getOpcode(); | ||||||
7428 | if (!BO->getType()->isPointerType() || (BOK != BO_Add && BOK != BO_Sub)) | ||||||
7429 | break; | ||||||
7430 | |||||||
7431 | if (BO->getLHS()->getType()->isPointerType()) | ||||||
7432 | visitLocalsRetainedByInitializer(Path, BO->getLHS(), Visit, true, | ||||||
7433 | EnableLifetimeWarnings); | ||||||
7434 | else if (BO->getRHS()->getType()->isPointerType()) | ||||||
7435 | visitLocalsRetainedByInitializer(Path, BO->getRHS(), Visit, true, | ||||||
7436 | EnableLifetimeWarnings); | ||||||
7437 | break; | ||||||
7438 | } | ||||||
7439 | |||||||
7440 | case Stmt::ConditionalOperatorClass: | ||||||
7441 | case Stmt::BinaryConditionalOperatorClass: { | ||||||
7442 | auto *C = cast<AbstractConditionalOperator>(Init); | ||||||
7443 | // In C++, we can have a throw-expression operand, which has 'void' type | ||||||
7444 | // and isn't interesting from a lifetime perspective. | ||||||
7445 | if (!C->getTrueExpr()->getType()->isVoidType()) | ||||||
7446 | visitLocalsRetainedByInitializer(Path, C->getTrueExpr(), Visit, true, | ||||||
7447 | EnableLifetimeWarnings); | ||||||
7448 | if (!C->getFalseExpr()->getType()->isVoidType()) | ||||||
7449 | visitLocalsRetainedByInitializer(Path, C->getFalseExpr(), Visit, true, | ||||||
7450 | EnableLifetimeWarnings); | ||||||
7451 | break; | ||||||
7452 | } | ||||||
7453 | |||||||
7454 | case Stmt::BlockExprClass: | ||||||
7455 | if (cast<BlockExpr>(Init)->getBlockDecl()->hasCaptures()) { | ||||||
7456 | // This is a local block, whose lifetime is that of the function. | ||||||
7457 | Visit(Path, Local(cast<BlockExpr>(Init)), RK_ReferenceBinding); | ||||||
7458 | } | ||||||
7459 | break; | ||||||
7460 | |||||||
7461 | case Stmt::AddrLabelExprClass: | ||||||
7462 | // We want to warn if the address of a label would escape the function. | ||||||
7463 | Visit(Path, Local(cast<AddrLabelExpr>(Init)), RK_ReferenceBinding); | ||||||
7464 | break; | ||||||
7465 | |||||||
7466 | default: | ||||||
7467 | break; | ||||||
7468 | } | ||||||
7469 | } | ||||||
7470 | |||||||
7471 | /// Whether a path to an object supports lifetime extension. | ||||||
7472 | enum PathLifetimeKind { | ||||||
7473 | /// Lifetime-extend along this path. | ||||||
7474 | Extend, | ||||||
7475 | /// We should lifetime-extend, but we don't because (due to technical | ||||||
7476 | /// limitations) we can't. This happens for default member initializers, | ||||||
7477 | /// which we don't clone for every use, so we don't have a unique | ||||||
7478 | /// MaterializeTemporaryExpr to update. | ||||||
7479 | ShouldExtend, | ||||||
7480 | /// Do not lifetime extend along this path. | ||||||
7481 | NoExtend | ||||||
7482 | }; | ||||||
7483 | |||||||
7484 | /// Determine whether this is an indirect path to a temporary that we are | ||||||
7485 | /// supposed to lifetime-extend along. | ||||||
7486 | static PathLifetimeKind | ||||||
7487 | shouldLifetimeExtendThroughPath(const IndirectLocalPath &Path) { | ||||||
7488 | PathLifetimeKind Kind = PathLifetimeKind::Extend; | ||||||
7489 | for (auto Elem : Path) { | ||||||
7490 | if (Elem.Kind == IndirectLocalPathEntry::DefaultInit) | ||||||
7491 | Kind = PathLifetimeKind::ShouldExtend; | ||||||
7492 | else if (Elem.Kind != IndirectLocalPathEntry::LambdaCaptureInit) | ||||||
7493 | return PathLifetimeKind::NoExtend; | ||||||
7494 | } | ||||||
7495 | return Kind; | ||||||
7496 | } | ||||||
7497 | |||||||
7498 | /// Find the range for the first interesting entry in the path at or after I. | ||||||
7499 | static SourceRange nextPathEntryRange(const IndirectLocalPath &Path, unsigned I, | ||||||
7500 | Expr *E) { | ||||||
7501 | for (unsigned N = Path.size(); I != N; ++I) { | ||||||
7502 | switch (Path[I].Kind) { | ||||||
7503 | case IndirectLocalPathEntry::AddressOf: | ||||||
7504 | case IndirectLocalPathEntry::LValToRVal: | ||||||
7505 | case IndirectLocalPathEntry::LifetimeBoundCall: | ||||||
7506 | case IndirectLocalPathEntry::TemporaryCopy: | ||||||
7507 | case IndirectLocalPathEntry::GslReferenceInit: | ||||||
7508 | case IndirectLocalPathEntry::GslPointerInit: | ||||||
7509 | // These exist primarily to mark the path as not permitting or | ||||||
7510 | // supporting lifetime extension. | ||||||
7511 | break; | ||||||
7512 | |||||||
7513 | case IndirectLocalPathEntry::VarInit: | ||||||
7514 | if (cast<VarDecl>(Path[I].D)->isImplicit()) | ||||||
7515 | return SourceRange(); | ||||||
7516 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
7517 | case IndirectLocalPathEntry::DefaultInit: | ||||||
7518 | return Path[I].E->getSourceRange(); | ||||||
7519 | |||||||
7520 | case IndirectLocalPathEntry::LambdaCaptureInit: | ||||||
7521 | if (!Path[I].Capture->capturesVariable()) | ||||||
7522 | continue; | ||||||
7523 | return Path[I].E->getSourceRange(); | ||||||
7524 | } | ||||||
7525 | } | ||||||
7526 | return E->getSourceRange(); | ||||||
7527 | } | ||||||
7528 | |||||||
7529 | static bool pathOnlyInitializesGslPointer(IndirectLocalPath &Path) { | ||||||
7530 | for (auto It = Path.rbegin(), End = Path.rend(); It != End; ++It) { | ||||||
7531 | if (It->Kind == IndirectLocalPathEntry::VarInit) | ||||||
7532 | continue; | ||||||
7533 | if (It->Kind == IndirectLocalPathEntry::AddressOf) | ||||||
7534 | continue; | ||||||
7535 | if (It->Kind == IndirectLocalPathEntry::LifetimeBoundCall) | ||||||
7536 | continue; | ||||||
7537 | return It->Kind == IndirectLocalPathEntry::GslPointerInit || | ||||||
7538 | It->Kind == IndirectLocalPathEntry::GslReferenceInit; | ||||||
7539 | } | ||||||
7540 | return false; | ||||||
7541 | } | ||||||
7542 | |||||||
7543 | void Sema::checkInitializerLifetime(const InitializedEntity &Entity, | ||||||
7544 | Expr *Init) { | ||||||
7545 | LifetimeResult LR = getEntityLifetime(&Entity); | ||||||
7546 | LifetimeKind LK = LR.getInt(); | ||||||
7547 | const InitializedEntity *ExtendingEntity = LR.getPointer(); | ||||||
7548 | |||||||
7549 | // If this entity doesn't have an interesting lifetime, don't bother looking | ||||||
7550 | // for temporaries within its initializer. | ||||||
7551 | if (LK == LK_FullExpression) | ||||||
7552 | return; | ||||||
7553 | |||||||
7554 | auto TemporaryVisitor = [&](IndirectLocalPath &Path, Local L, | ||||||
7555 | ReferenceKind RK) -> bool { | ||||||
7556 | SourceRange DiagRange = nextPathEntryRange(Path, 0, L); | ||||||
7557 | SourceLocation DiagLoc = DiagRange.getBegin(); | ||||||
7558 | |||||||
7559 | auto *MTE = dyn_cast<MaterializeTemporaryExpr>(L); | ||||||
7560 | |||||||
7561 | bool IsGslPtrInitWithGslTempOwner = false; | ||||||
7562 | bool IsLocalGslOwner = false; | ||||||
7563 | if (pathOnlyInitializesGslPointer(Path)) { | ||||||
7564 | if (isa<DeclRefExpr>(L)) { | ||||||
7565 | // We do not want to follow the references when returning a pointer originating | ||||||
7566 | // from a local owner to avoid the following false positive: | ||||||
7567 | // int &p = *localUniquePtr; | ||||||
7568 | // someContainer.add(std::move(localUniquePtr)); | ||||||
7569 | // return p; | ||||||
7570 | IsLocalGslOwner = isRecordWithAttr<OwnerAttr>(L->getType()); | ||||||
7571 | if (pathContainsInit(Path) || !IsLocalGslOwner) | ||||||
7572 | return false; | ||||||
7573 | } else { | ||||||
7574 | IsGslPtrInitWithGslTempOwner = MTE && !MTE->getExtendingDecl() && | ||||||
7575 | isRecordWithAttr<OwnerAttr>(MTE->getType()); | ||||||
7576 | // Skipping a chain of initializing gsl::Pointer annotated objects. | ||||||
7577 | // We are looking only for the final source to find out if it was | ||||||
7578 | // a local or temporary owner or the address of a local variable/param. | ||||||
7579 | if (!IsGslPtrInitWithGslTempOwner) | ||||||
7580 | return true; | ||||||
7581 | } | ||||||
7582 | } | ||||||
7583 | |||||||
7584 | switch (LK) { | ||||||
7585 | case LK_FullExpression: | ||||||
7586 | llvm_unreachable("already handled this")::llvm::llvm_unreachable_internal("already handled this", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7586); | ||||||
7587 | |||||||
7588 | case LK_Extended: { | ||||||
7589 | if (!MTE) { | ||||||
7590 | // The initialized entity has lifetime beyond the full-expression, | ||||||
7591 | // and the local entity does too, so don't warn. | ||||||
7592 | // | ||||||
7593 | // FIXME: We should consider warning if a static / thread storage | ||||||
7594 | // duration variable retains an automatic storage duration local. | ||||||
7595 | return false; | ||||||
7596 | } | ||||||
7597 | |||||||
7598 | if (IsGslPtrInitWithGslTempOwner && DiagLoc.isValid()) { | ||||||
7599 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer) << DiagRange; | ||||||
7600 | return false; | ||||||
7601 | } | ||||||
7602 | |||||||
7603 | switch (shouldLifetimeExtendThroughPath(Path)) { | ||||||
7604 | case PathLifetimeKind::Extend: | ||||||
7605 | // Update the storage duration of the materialized temporary. | ||||||
7606 | // FIXME: Rebuild the expression instead of mutating it. | ||||||
7607 | MTE->setExtendingDecl(ExtendingEntity->getDecl(), | ||||||
7608 | ExtendingEntity->allocateManglingNumber()); | ||||||
7609 | // Also visit the temporaries lifetime-extended by this initializer. | ||||||
7610 | return true; | ||||||
7611 | |||||||
7612 | case PathLifetimeKind::ShouldExtend: | ||||||
7613 | // We're supposed to lifetime-extend the temporary along this path (per | ||||||
7614 | // the resolution of DR1815), but we don't support that yet. | ||||||
7615 | // | ||||||
7616 | // FIXME: Properly handle this situation. Perhaps the easiest approach | ||||||
7617 | // would be to clone the initializer expression on each use that would | ||||||
7618 | // lifetime extend its temporaries. | ||||||
7619 | Diag(DiagLoc, diag::warn_unsupported_lifetime_extension) | ||||||
7620 | << RK << DiagRange; | ||||||
7621 | break; | ||||||
7622 | |||||||
7623 | case PathLifetimeKind::NoExtend: | ||||||
7624 | // If the path goes through the initialization of a variable or field, | ||||||
7625 | // it can't possibly reach a temporary created in this full-expression. | ||||||
7626 | // We will have already diagnosed any problems with the initializer. | ||||||
7627 | if (pathContainsInit(Path)) | ||||||
7628 | return false; | ||||||
7629 | |||||||
7630 | Diag(DiagLoc, diag::warn_dangling_variable) | ||||||
7631 | << RK << !Entity.getParent() | ||||||
7632 | << ExtendingEntity->getDecl()->isImplicit() | ||||||
7633 | << ExtendingEntity->getDecl() << Init->isGLValue() << DiagRange; | ||||||
7634 | break; | ||||||
7635 | } | ||||||
7636 | break; | ||||||
7637 | } | ||||||
7638 | |||||||
7639 | case LK_MemInitializer: { | ||||||
7640 | if (isa<MaterializeTemporaryExpr>(L)) { | ||||||
7641 | // Under C++ DR1696, if a mem-initializer (or a default member | ||||||
7642 | // initializer used by the absence of one) would lifetime-extend a | ||||||
7643 | // temporary, the program is ill-formed. | ||||||
7644 | if (auto *ExtendingDecl = | ||||||
7645 | ExtendingEntity ? ExtendingEntity->getDecl() : nullptr) { | ||||||
7646 | if (IsGslPtrInitWithGslTempOwner) { | ||||||
7647 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer_member) | ||||||
7648 | << ExtendingDecl << DiagRange; | ||||||
7649 | Diag(ExtendingDecl->getLocation(), | ||||||
7650 | diag::note_ref_or_ptr_member_declared_here) | ||||||
7651 | << true; | ||||||
7652 | return false; | ||||||
7653 | } | ||||||
7654 | bool IsSubobjectMember = ExtendingEntity != &Entity; | ||||||
7655 | Diag(DiagLoc, shouldLifetimeExtendThroughPath(Path) != | ||||||
7656 | PathLifetimeKind::NoExtend | ||||||
7657 | ? diag::err_dangling_member | ||||||
7658 | : diag::warn_dangling_member) | ||||||
7659 | << ExtendingDecl << IsSubobjectMember << RK << DiagRange; | ||||||
7660 | // Don't bother adding a note pointing to the field if we're inside | ||||||
7661 | // its default member initializer; our primary diagnostic points to | ||||||
7662 | // the same place in that case. | ||||||
7663 | if (Path.empty() || | ||||||
7664 | Path.back().Kind != IndirectLocalPathEntry::DefaultInit) { | ||||||
7665 | Diag(ExtendingDecl->getLocation(), | ||||||
7666 | diag::note_lifetime_extending_member_declared_here) | ||||||
7667 | << RK << IsSubobjectMember; | ||||||
7668 | } | ||||||
7669 | } else { | ||||||
7670 | // We have a mem-initializer but no particular field within it; this | ||||||
7671 | // is either a base class or a delegating initializer directly | ||||||
7672 | // initializing the base-class from something that doesn't live long | ||||||
7673 | // enough. | ||||||
7674 | // | ||||||
7675 | // FIXME: Warn on this. | ||||||
7676 | return false; | ||||||
7677 | } | ||||||
7678 | } else { | ||||||
7679 | // Paths via a default initializer can only occur during error recovery | ||||||
7680 | // (there's no other way that a default initializer can refer to a | ||||||
7681 | // local). Don't produce a bogus warning on those cases. | ||||||
7682 | if (pathContainsInit(Path)) | ||||||
7683 | return false; | ||||||
7684 | |||||||
7685 | // Suppress false positives for code like the one below: | ||||||
7686 | // Ctor(unique_ptr<T> up) : member(*up), member2(move(up)) {} | ||||||
7687 | if (IsLocalGslOwner && pathOnlyInitializesGslPointer(Path)) | ||||||
7688 | return false; | ||||||
7689 | |||||||
7690 | auto *DRE = dyn_cast<DeclRefExpr>(L); | ||||||
7691 | auto *VD = DRE ? dyn_cast<VarDecl>(DRE->getDecl()) : nullptr; | ||||||
7692 | if (!VD) { | ||||||
7693 | // A member was initialized to a local block. | ||||||
7694 | // FIXME: Warn on this. | ||||||
7695 | return false; | ||||||
7696 | } | ||||||
7697 | |||||||
7698 | if (auto *Member = | ||||||
7699 | ExtendingEntity ? ExtendingEntity->getDecl() : nullptr) { | ||||||
7700 | bool IsPointer = !Member->getType()->isReferenceType(); | ||||||
7701 | Diag(DiagLoc, IsPointer ? diag::warn_init_ptr_member_to_parameter_addr | ||||||
7702 | : diag::warn_bind_ref_member_to_parameter) | ||||||
7703 | << Member << VD << isa<ParmVarDecl>(VD) << DiagRange; | ||||||
7704 | Diag(Member->getLocation(), | ||||||
7705 | diag::note_ref_or_ptr_member_declared_here) | ||||||
7706 | << (unsigned)IsPointer; | ||||||
7707 | } | ||||||
7708 | } | ||||||
7709 | break; | ||||||
7710 | } | ||||||
7711 | |||||||
7712 | case LK_New: | ||||||
7713 | if (isa<MaterializeTemporaryExpr>(L)) { | ||||||
7714 | if (IsGslPtrInitWithGslTempOwner) | ||||||
7715 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer) << DiagRange; | ||||||
7716 | else | ||||||
7717 | Diag(DiagLoc, RK == RK_ReferenceBinding | ||||||
7718 | ? diag::warn_new_dangling_reference | ||||||
7719 | : diag::warn_new_dangling_initializer_list) | ||||||
7720 | << !Entity.getParent() << DiagRange; | ||||||
7721 | } else { | ||||||
7722 | // We can't determine if the allocation outlives the local declaration. | ||||||
7723 | return false; | ||||||
7724 | } | ||||||
7725 | break; | ||||||
7726 | |||||||
7727 | case LK_Return: | ||||||
7728 | case LK_StmtExprResult: | ||||||
7729 | if (auto *DRE = dyn_cast<DeclRefExpr>(L)) { | ||||||
7730 | // We can't determine if the local variable outlives the statement | ||||||
7731 | // expression. | ||||||
7732 | if (LK == LK_StmtExprResult) | ||||||
7733 | return false; | ||||||
7734 | Diag(DiagLoc, diag::warn_ret_stack_addr_ref) | ||||||
7735 | << Entity.getType()->isReferenceType() << DRE->getDecl() | ||||||
7736 | << isa<ParmVarDecl>(DRE->getDecl()) << DiagRange; | ||||||
7737 | } else if (isa<BlockExpr>(L)) { | ||||||
7738 | Diag(DiagLoc, diag::err_ret_local_block) << DiagRange; | ||||||
7739 | } else if (isa<AddrLabelExpr>(L)) { | ||||||
7740 | // Don't warn when returning a label from a statement expression. | ||||||
7741 | // Leaving the scope doesn't end its lifetime. | ||||||
7742 | if (LK == LK_StmtExprResult) | ||||||
7743 | return false; | ||||||
7744 | Diag(DiagLoc, diag::warn_ret_addr_label) << DiagRange; | ||||||
7745 | } else { | ||||||
7746 | Diag(DiagLoc, diag::warn_ret_local_temp_addr_ref) | ||||||
7747 | << Entity.getType()->isReferenceType() << DiagRange; | ||||||
7748 | } | ||||||
7749 | break; | ||||||
7750 | } | ||||||
7751 | |||||||
7752 | for (unsigned I = 0; I != Path.size(); ++I) { | ||||||
7753 | auto Elem = Path[I]; | ||||||
7754 | |||||||
7755 | switch (Elem.Kind) { | ||||||
7756 | case IndirectLocalPathEntry::AddressOf: | ||||||
7757 | case IndirectLocalPathEntry::LValToRVal: | ||||||
7758 | // These exist primarily to mark the path as not permitting or | ||||||
7759 | // supporting lifetime extension. | ||||||
7760 | break; | ||||||
7761 | |||||||
7762 | case IndirectLocalPathEntry::LifetimeBoundCall: | ||||||
7763 | case IndirectLocalPathEntry::TemporaryCopy: | ||||||
7764 | case IndirectLocalPathEntry::GslPointerInit: | ||||||
7765 | case IndirectLocalPathEntry::GslReferenceInit: | ||||||
7766 | // FIXME: Consider adding a note for these. | ||||||
7767 | break; | ||||||
7768 | |||||||
7769 | case IndirectLocalPathEntry::DefaultInit: { | ||||||
7770 | auto *FD = cast<FieldDecl>(Elem.D); | ||||||
7771 | Diag(FD->getLocation(), diag::note_init_with_default_member_initalizer) | ||||||
7772 | << FD << nextPathEntryRange(Path, I + 1, L); | ||||||
7773 | break; | ||||||
7774 | } | ||||||
7775 | |||||||
7776 | case IndirectLocalPathEntry::VarInit: { | ||||||
7777 | const VarDecl *VD = cast<VarDecl>(Elem.D); | ||||||
7778 | Diag(VD->getLocation(), diag::note_local_var_initializer) | ||||||
7779 | << VD->getType()->isReferenceType() | ||||||
7780 | << VD->isImplicit() << VD->getDeclName() | ||||||
7781 | << nextPathEntryRange(Path, I + 1, L); | ||||||
7782 | break; | ||||||
7783 | } | ||||||
7784 | |||||||
7785 | case IndirectLocalPathEntry::LambdaCaptureInit: | ||||||
7786 | if (!Elem.Capture->capturesVariable()) | ||||||
7787 | break; | ||||||
7788 | // FIXME: We can't easily tell apart an init-capture from a nested | ||||||
7789 | // capture of an init-capture. | ||||||
7790 | const VarDecl *VD = Elem.Capture->getCapturedVar(); | ||||||
7791 | Diag(Elem.Capture->getLocation(), diag::note_lambda_capture_initializer) | ||||||
7792 | << VD << VD->isInitCapture() << Elem.Capture->isExplicit() | ||||||
7793 | << (Elem.Capture->getCaptureKind() == LCK_ByRef) << VD | ||||||
7794 | << nextPathEntryRange(Path, I + 1, L); | ||||||
7795 | break; | ||||||
7796 | } | ||||||
7797 | } | ||||||
7798 | |||||||
7799 | // We didn't lifetime-extend, so don't go any further; we don't need more | ||||||
7800 | // warnings or errors on inner temporaries within this one's initializer. | ||||||
7801 | return false; | ||||||
7802 | }; | ||||||
7803 | |||||||
7804 | bool EnableLifetimeWarnings = !getDiagnostics().isIgnored( | ||||||
7805 | diag::warn_dangling_lifetime_pointer, SourceLocation()); | ||||||
7806 | llvm::SmallVector<IndirectLocalPathEntry, 8> Path; | ||||||
7807 | if (Init->isGLValue()) | ||||||
7808 | visitLocalsRetainedByReferenceBinding(Path, Init, RK_ReferenceBinding, | ||||||
7809 | TemporaryVisitor, | ||||||
7810 | EnableLifetimeWarnings); | ||||||
7811 | else | ||||||
7812 | visitLocalsRetainedByInitializer(Path, Init, TemporaryVisitor, false, | ||||||
7813 | EnableLifetimeWarnings); | ||||||
7814 | } | ||||||
7815 | |||||||
7816 | static void DiagnoseNarrowingInInitList(Sema &S, | ||||||
7817 | const ImplicitConversionSequence &ICS, | ||||||
7818 | QualType PreNarrowingType, | ||||||
7819 | QualType EntityType, | ||||||
7820 | const Expr *PostInit); | ||||||
7821 | |||||||
7822 | /// Provide warnings when std::move is used on construction. | ||||||
7823 | static void CheckMoveOnConstruction(Sema &S, const Expr *InitExpr, | ||||||
7824 | bool IsReturnStmt) { | ||||||
7825 | if (!InitExpr) | ||||||
7826 | return; | ||||||
7827 | |||||||
7828 | if (S.inTemplateInstantiation()) | ||||||
7829 | return; | ||||||
7830 | |||||||
7831 | QualType DestType = InitExpr->getType(); | ||||||
7832 | if (!DestType->isRecordType()) | ||||||
7833 | return; | ||||||
7834 | |||||||
7835 | unsigned DiagID = 0; | ||||||
7836 | if (IsReturnStmt) { | ||||||
7837 | const CXXConstructExpr *CCE = | ||||||
7838 | dyn_cast<CXXConstructExpr>(InitExpr->IgnoreParens()); | ||||||
7839 | if (!CCE || CCE->getNumArgs() != 1) | ||||||
7840 | return; | ||||||
7841 | |||||||
7842 | if (!CCE->getConstructor()->isCopyOrMoveConstructor()) | ||||||
7843 | return; | ||||||
7844 | |||||||
7845 | InitExpr = CCE->getArg(0)->IgnoreImpCasts(); | ||||||
7846 | } | ||||||
7847 | |||||||
7848 | // Find the std::move call and get the argument. | ||||||
7849 | const CallExpr *CE = dyn_cast<CallExpr>(InitExpr->IgnoreParens()); | ||||||
7850 | if (!CE || !CE->isCallToStdMove()) | ||||||
7851 | return; | ||||||
7852 | |||||||
7853 | const Expr *Arg = CE->getArg(0)->IgnoreImplicit(); | ||||||
7854 | |||||||
7855 | if (IsReturnStmt) { | ||||||
7856 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg->IgnoreParenImpCasts()); | ||||||
7857 | if (!DRE || DRE->refersToEnclosingVariableOrCapture()) | ||||||
7858 | return; | ||||||
7859 | |||||||
7860 | const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||||
7861 | if (!VD || !VD->hasLocalStorage()) | ||||||
7862 | return; | ||||||
7863 | |||||||
7864 | // __block variables are not moved implicitly. | ||||||
7865 | if (VD->hasAttr<BlocksAttr>()) | ||||||
7866 | return; | ||||||
7867 | |||||||
7868 | QualType SourceType = VD->getType(); | ||||||
7869 | if (!SourceType->isRecordType()) | ||||||
7870 | return; | ||||||
7871 | |||||||
7872 | if (!S.Context.hasSameUnqualifiedType(DestType, SourceType)) { | ||||||
7873 | return; | ||||||
7874 | } | ||||||
7875 | |||||||
7876 | // If we're returning a function parameter, copy elision | ||||||
7877 | // is not possible. | ||||||
7878 | if (isa<ParmVarDecl>(VD)) | ||||||
7879 | DiagID = diag::warn_redundant_move_on_return; | ||||||
7880 | else | ||||||
7881 | DiagID = diag::warn_pessimizing_move_on_return; | ||||||
7882 | } else { | ||||||
7883 | DiagID = diag::warn_pessimizing_move_on_initialization; | ||||||
7884 | const Expr *ArgStripped = Arg->IgnoreImplicit()->IgnoreParens(); | ||||||
7885 | if (!ArgStripped->isPRValue() || !ArgStripped->getType()->isRecordType()) | ||||||
7886 | return; | ||||||
7887 | } | ||||||
7888 | |||||||
7889 | S.Diag(CE->getBeginLoc(), DiagID); | ||||||
7890 | |||||||
7891 | // Get all the locations for a fix-it. Don't emit the fix-it if any location | ||||||
7892 | // is within a macro. | ||||||
7893 | SourceLocation CallBegin = CE->getCallee()->getBeginLoc(); | ||||||
7894 | if (CallBegin.isMacroID()) | ||||||
7895 | return; | ||||||
7896 | SourceLocation RParen = CE->getRParenLoc(); | ||||||
7897 | if (RParen.isMacroID()) | ||||||
7898 | return; | ||||||
7899 | SourceLocation LParen; | ||||||
7900 | SourceLocation ArgLoc = Arg->getBeginLoc(); | ||||||
7901 | |||||||
7902 | // Special testing for the argument location. Since the fix-it needs the | ||||||
7903 | // location right before the argument, the argument location can be in a | ||||||
7904 | // macro only if it is at the beginning of the macro. | ||||||
7905 | while (ArgLoc.isMacroID() && | ||||||
7906 | S.getSourceManager().isAtStartOfImmediateMacroExpansion(ArgLoc)) { | ||||||
7907 | ArgLoc = S.getSourceManager().getImmediateExpansionRange(ArgLoc).getBegin(); | ||||||
7908 | } | ||||||
7909 | |||||||
7910 | if (LParen.isMacroID()) | ||||||
7911 | return; | ||||||
7912 | |||||||
7913 | LParen = ArgLoc.getLocWithOffset(-1); | ||||||
7914 | |||||||
7915 | S.Diag(CE->getBeginLoc(), diag::note_remove_move) | ||||||
7916 | << FixItHint::CreateRemoval(SourceRange(CallBegin, LParen)) | ||||||
7917 | << FixItHint::CreateRemoval(SourceRange(RParen, RParen)); | ||||||
7918 | } | ||||||
7919 | |||||||
7920 | static void CheckForNullPointerDereference(Sema &S, const Expr *E) { | ||||||
7921 | // Check to see if we are dereferencing a null pointer. If so, this is | ||||||
7922 | // undefined behavior, so warn about it. This only handles the pattern | ||||||
7923 | // "*null", which is a very syntactic check. | ||||||
7924 | if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParenCasts())) | ||||||
7925 | if (UO->getOpcode() == UO_Deref && | ||||||
7926 | UO->getSubExpr()->IgnoreParenCasts()-> | ||||||
7927 | isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull)) { | ||||||
7928 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | ||||||
7929 | S.PDiag(diag::warn_binding_null_to_reference) | ||||||
7930 | << UO->getSubExpr()->getSourceRange()); | ||||||
7931 | } | ||||||
7932 | } | ||||||
7933 | |||||||
7934 | MaterializeTemporaryExpr * | ||||||
7935 | Sema::CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary, | ||||||
7936 | bool BoundToLvalueReference) { | ||||||
7937 | auto MTE = new (Context) | ||||||
7938 | MaterializeTemporaryExpr(T, Temporary, BoundToLvalueReference); | ||||||
7939 | |||||||
7940 | // Order an ExprWithCleanups for lifetime marks. | ||||||
7941 | // | ||||||
7942 | // TODO: It'll be good to have a single place to check the access of the | ||||||
7943 | // destructor and generate ExprWithCleanups for various uses. Currently these | ||||||
7944 | // are done in both CreateMaterializeTemporaryExpr and MaybeBindToTemporary, | ||||||
7945 | // but there may be a chance to merge them. | ||||||
7946 | Cleanup.setExprNeedsCleanups(false); | ||||||
7947 | return MTE; | ||||||
7948 | } | ||||||
7949 | |||||||
7950 | ExprResult Sema::TemporaryMaterializationConversion(Expr *E) { | ||||||
7951 | // In C++98, we don't want to implicitly create an xvalue. | ||||||
7952 | // FIXME: This means that AST consumers need to deal with "prvalues" that | ||||||
7953 | // denote materialized temporaries. Maybe we should add another ValueKind | ||||||
7954 | // for "xvalue pretending to be a prvalue" for C++98 support. | ||||||
7955 | if (!E->isPRValue() || !getLangOpts().CPlusPlus11) | ||||||
7956 | return E; | ||||||
7957 | |||||||
7958 | // C++1z [conv.rval]/1: T shall be a complete type. | ||||||
7959 | // FIXME: Does this ever matter (can we form a prvalue of incomplete type)? | ||||||
7960 | // If so, we should check for a non-abstract class type here too. | ||||||
7961 | QualType T = E->getType(); | ||||||
7962 | if (RequireCompleteType(E->getExprLoc(), T, diag::err_incomplete_type)) | ||||||
7963 | return ExprError(); | ||||||
7964 | |||||||
7965 | return CreateMaterializeTemporaryExpr(E->getType(), E, false); | ||||||
7966 | } | ||||||
7967 | |||||||
7968 | ExprResult Sema::PerformQualificationConversion(Expr *E, QualType Ty, | ||||||
7969 | ExprValueKind VK, | ||||||
7970 | CheckedConversionKind CCK) { | ||||||
7971 | |||||||
7972 | CastKind CK = CK_NoOp; | ||||||
7973 | |||||||
7974 | if (VK == VK_PRValue) { | ||||||
7975 | auto PointeeTy = Ty->getPointeeType(); | ||||||
7976 | auto ExprPointeeTy = E->getType()->getPointeeType(); | ||||||
7977 | if (!PointeeTy.isNull() && | ||||||
7978 | PointeeTy.getAddressSpace() != ExprPointeeTy.getAddressSpace()) | ||||||
7979 | CK = CK_AddressSpaceConversion; | ||||||
7980 | } else if (Ty.getAddressSpace() != E->getType().getAddressSpace()) { | ||||||
7981 | CK = CK_AddressSpaceConversion; | ||||||
7982 | } | ||||||
7983 | |||||||
7984 | return ImpCastExprToType(E, Ty, CK, VK, /*BasePath=*/nullptr, CCK); | ||||||
7985 | } | ||||||
7986 | |||||||
7987 | ExprResult InitializationSequence::Perform(Sema &S, | ||||||
7988 | const InitializedEntity &Entity, | ||||||
7989 | const InitializationKind &Kind, | ||||||
7990 | MultiExprArg Args, | ||||||
7991 | QualType *ResultType) { | ||||||
7992 | if (Failed()) { | ||||||
7993 | Diagnose(S, Entity, Kind, Args); | ||||||
7994 | return ExprError(); | ||||||
7995 | } | ||||||
7996 | if (!ZeroInitializationFixit.empty()) { | ||||||
7997 | unsigned DiagID = diag::err_default_init_const; | ||||||
7998 | if (Decl *D = Entity.getDecl()) | ||||||
7999 | if (S.getLangOpts().MSVCCompat && D->hasAttr<SelectAnyAttr>()) | ||||||
8000 | DiagID = diag::ext_default_init_const; | ||||||
8001 | |||||||
8002 | // The initialization would have succeeded with this fixit. Since the fixit | ||||||
8003 | // is on the error, we need to build a valid AST in this case, so this isn't | ||||||
8004 | // handled in the Failed() branch above. | ||||||
8005 | QualType DestType = Entity.getType(); | ||||||
8006 | S.Diag(Kind.getLocation(), DiagID) | ||||||
8007 | << DestType << (bool)DestType->getAs<RecordType>() | ||||||
8008 | << FixItHint::CreateInsertion(ZeroInitializationFixitLoc, | ||||||
8009 | ZeroInitializationFixit); | ||||||
8010 | } | ||||||
8011 | |||||||
8012 | if (getKind() == DependentSequence) { | ||||||
8013 | // If the declaration is a non-dependent, incomplete array type | ||||||
8014 | // that has an initializer, then its type will be completed once | ||||||
8015 | // the initializer is instantiated. | ||||||
8016 | if (ResultType && !Entity.getType()->isDependentType() && | ||||||
8017 | Args.size() == 1) { | ||||||
8018 | QualType DeclType = Entity.getType(); | ||||||
8019 | if (const IncompleteArrayType *ArrayT | ||||||
8020 | = S.Context.getAsIncompleteArrayType(DeclType)) { | ||||||
8021 | // FIXME: We don't currently have the ability to accurately | ||||||
8022 | // compute the length of an initializer list without | ||||||
8023 | // performing full type-checking of the initializer list | ||||||
8024 | // (since we have to determine where braces are implicitly | ||||||
8025 | // introduced and such). So, we fall back to making the array | ||||||
8026 | // type a dependently-sized array type with no specified | ||||||
8027 | // bound. | ||||||
8028 | if (isa<InitListExpr>((Expr *)Args[0])) { | ||||||
8029 | SourceRange Brackets; | ||||||
8030 | |||||||
8031 | // Scavange the location of the brackets from the entity, if we can. | ||||||
8032 | if (auto *DD = dyn_cast_or_null<DeclaratorDecl>(Entity.getDecl())) { | ||||||
8033 | if (TypeSourceInfo *TInfo = DD->getTypeSourceInfo()) { | ||||||
8034 | TypeLoc TL = TInfo->getTypeLoc(); | ||||||
8035 | if (IncompleteArrayTypeLoc ArrayLoc = | ||||||
8036 | TL.getAs<IncompleteArrayTypeLoc>()) | ||||||
8037 | Brackets = ArrayLoc.getBracketsRange(); | ||||||
8038 | } | ||||||
8039 | } | ||||||
8040 | |||||||
8041 | *ResultType | ||||||
8042 | = S.Context.getDependentSizedArrayType(ArrayT->getElementType(), | ||||||
8043 | /*NumElts=*/nullptr, | ||||||
8044 | ArrayT->getSizeModifier(), | ||||||
8045 | ArrayT->getIndexTypeCVRQualifiers(), | ||||||
8046 | Brackets); | ||||||
8047 | } | ||||||
8048 | |||||||
8049 | } | ||||||
8050 | } | ||||||
8051 | if (Kind.getKind() == InitializationKind::IK_Direct && | ||||||
8052 | !Kind.isExplicitCast()) { | ||||||
8053 | // Rebuild the ParenListExpr. | ||||||
8054 | SourceRange ParenRange = Kind.getParenOrBraceRange(); | ||||||
8055 | return S.ActOnParenListExpr(ParenRange.getBegin(), ParenRange.getEnd(), | ||||||
8056 | Args); | ||||||
8057 | } | ||||||
8058 | assert(Kind.getKind() == InitializationKind::IK_Copy ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)) | ||||||
8059 | Kind.isExplicitCast() ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)) | ||||||
8060 | Kind.getKind() == InitializationKind::IK_DirectList)(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)); | ||||||
8061 | return ExprResult(Args[0]); | ||||||
8062 | } | ||||||
8063 | |||||||
8064 | // No steps means no initialization. | ||||||
8065 | if (Steps.empty()) | ||||||
8066 | return ExprResult((Expr *)nullptr); | ||||||
8067 | |||||||
8068 | if (S.getLangOpts().CPlusPlus11 && Entity.getType()->isReferenceType() && | ||||||
8069 | Args.size() == 1 && isa<InitListExpr>(Args[0]) && | ||||||
8070 | !Entity.isParamOrTemplateParamKind()) { | ||||||
8071 | // Produce a C++98 compatibility warning if we are initializing a reference | ||||||
8072 | // from an initializer list. For parameters, we produce a better warning | ||||||
8073 | // elsewhere. | ||||||
8074 | Expr *Init = Args[0]; | ||||||
8075 | S.Diag(Init->getBeginLoc(), diag::warn_cxx98_compat_reference_list_init) | ||||||
8076 | << Init->getSourceRange(); | ||||||
8077 | } | ||||||
8078 | |||||||
8079 | // OpenCL v2.0 s6.13.11.1. atomic variables can be initialized in global scope | ||||||
8080 | QualType ETy = Entity.getType(); | ||||||
8081 | bool HasGlobalAS = ETy.hasAddressSpace() && | ||||||
8082 | ETy.getAddressSpace() == LangAS::opencl_global; | ||||||
8083 | |||||||
8084 | if (S.getLangOpts().OpenCLVersion >= 200 && | ||||||
8085 | ETy->isAtomicType() && !HasGlobalAS && | ||||||
8086 | Entity.getKind() == InitializedEntity::EK_Variable && Args.size() > 0) { | ||||||
8087 | S.Diag(Args[0]->getBeginLoc(), diag::err_opencl_atomic_init) | ||||||
8088 | << 1 | ||||||
8089 | << SourceRange(Entity.getDecl()->getBeginLoc(), Args[0]->getEndLoc()); | ||||||
8090 | return ExprError(); | ||||||
8091 | } | ||||||
8092 | |||||||
8093 | QualType DestType = Entity.getType().getNonReferenceType(); | ||||||
8094 | // FIXME: Ugly hack around the fact that Entity.getType() is not | ||||||
8095 | // the same as Entity.getDecl()->getType() in cases involving type merging, | ||||||
8096 | // and we want latter when it makes sense. | ||||||
8097 | if (ResultType) | ||||||
8098 | *ResultType = Entity.getDecl() ? Entity.getDecl()->getType() : | ||||||
8099 | Entity.getType(); | ||||||
8100 | |||||||
8101 | ExprResult CurInit((Expr *)nullptr); | ||||||
8102 | SmallVector<Expr*, 4> ArrayLoopCommonExprs; | ||||||
8103 | |||||||
8104 | // For initialization steps that start with a single initializer, | ||||||
8105 | // grab the only argument out the Args and place it into the "current" | ||||||
8106 | // initializer. | ||||||
8107 | switch (Steps.front().Kind) { | ||||||
8108 | case SK_ResolveAddressOfOverloadedFunction: | ||||||
8109 | case SK_CastDerivedToBasePRValue: | ||||||
8110 | case SK_CastDerivedToBaseXValue: | ||||||
8111 | case SK_CastDerivedToBaseLValue: | ||||||
8112 | case SK_BindReference: | ||||||
8113 | case SK_BindReferenceToTemporary: | ||||||
8114 | case SK_FinalCopy: | ||||||
8115 | case SK_ExtraneousCopyToTemporary: | ||||||
8116 | case SK_UserConversion: | ||||||
8117 | case SK_QualificationConversionLValue: | ||||||
8118 | case SK_QualificationConversionXValue: | ||||||
8119 | case SK_QualificationConversionPRValue: | ||||||
8120 | case SK_FunctionReferenceConversion: | ||||||
8121 | case SK_AtomicConversion: | ||||||
8122 | case SK_ConversionSequence: | ||||||
8123 | case SK_ConversionSequenceNoNarrowing: | ||||||
8124 | case SK_ListInitialization: | ||||||
8125 | case SK_UnwrapInitList: | ||||||
8126 | case SK_RewrapInitList: | ||||||
8127 | case SK_CAssignment: | ||||||
8128 | case SK_StringInit: | ||||||
8129 | case SK_ObjCObjectConversion: | ||||||
8130 | case SK_ArrayLoopIndex: | ||||||
8131 | case SK_ArrayLoopInit: | ||||||
8132 | case SK_ArrayInit: | ||||||
8133 | case SK_GNUArrayInit: | ||||||
8134 | case SK_ParenthesizedArrayInit: | ||||||
8135 | case SK_PassByIndirectCopyRestore: | ||||||
8136 | case SK_PassByIndirectRestore: | ||||||
8137 | case SK_ProduceObjCObject: | ||||||
8138 | case SK_StdInitializerList: | ||||||
8139 | case SK_OCLSamplerInit: | ||||||
8140 | case SK_OCLZeroOpaqueType: { | ||||||
8141 | assert(Args.size() == 1)(static_cast <bool> (Args.size() == 1) ? void (0) : __assert_fail ("Args.size() == 1", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8141, __extension__ __PRETTY_FUNCTION__)); | ||||||
8142 | CurInit = Args[0]; | ||||||
8143 | if (!CurInit.get()) return ExprError(); | ||||||
8144 | break; | ||||||
8145 | } | ||||||
8146 | |||||||
8147 | case SK_ConstructorInitialization: | ||||||
8148 | case SK_ConstructorInitializationFromList: | ||||||
8149 | case SK_StdInitializerListConstructorCall: | ||||||
8150 | case SK_ZeroInitialization: | ||||||
8151 | break; | ||||||
8152 | } | ||||||
8153 | |||||||
8154 | // Promote from an unevaluated context to an unevaluated list context in | ||||||
8155 | // C++11 list-initialization; we need to instantiate entities usable in | ||||||
8156 | // constant expressions here in order to perform narrowing checks =( | ||||||
8157 | EnterExpressionEvaluationContext Evaluated( | ||||||
8158 | S, EnterExpressionEvaluationContext::InitList, | ||||||
8159 | CurInit.get() && isa<InitListExpr>(CurInit.get())); | ||||||
8160 | |||||||
8161 | // C++ [class.abstract]p2: | ||||||
8162 | // no objects of an abstract class can be created except as subobjects | ||||||
8163 | // of a class derived from it | ||||||
8164 | auto checkAbstractType = [&](QualType T) -> bool { | ||||||
8165 | if (Entity.getKind() == InitializedEntity::EK_Base || | ||||||
8166 | Entity.getKind() == InitializedEntity::EK_Delegating) | ||||||
8167 | return false; | ||||||
8168 | return S.RequireNonAbstractType(Kind.getLocation(), T, | ||||||
8169 | diag::err_allocation_of_abstract_type); | ||||||
8170 | }; | ||||||
8171 | |||||||
8172 | // Walk through the computed steps for the initialization sequence, | ||||||
8173 | // performing the specified conversions along the way. | ||||||
8174 | bool ConstructorInitRequiresZeroInit = false; | ||||||
8175 | for (step_iterator Step = step_begin(), StepEnd = step_end(); | ||||||
8176 | Step != StepEnd; ++Step) { | ||||||
8177 | if (CurInit.isInvalid()) | ||||||
8178 | return ExprError(); | ||||||
8179 | |||||||
8180 | QualType SourceType = CurInit.get() ? CurInit.get()->getType() : QualType(); | ||||||
8181 | |||||||
8182 | switch (Step->Kind) { | ||||||
8183 | case SK_ResolveAddressOfOverloadedFunction: | ||||||
8184 | // Overload resolution determined which function invoke; update the | ||||||
8185 | // initializer to reflect that choice. | ||||||
8186 | S.CheckAddressOfMemberAccess(CurInit.get(), Step->Function.FoundDecl); | ||||||
8187 | if (S.DiagnoseUseOfDecl(Step->Function.FoundDecl, Kind.getLocation())) | ||||||
8188 | return ExprError(); | ||||||
8189 | CurInit = S.FixOverloadedFunctionReference(CurInit, | ||||||
8190 | Step->Function.FoundDecl, | ||||||
8191 | Step->Function.Function); | ||||||
8192 | break; | ||||||
8193 | |||||||
8194 | case SK_CastDerivedToBasePRValue: | ||||||
8195 | case SK_CastDerivedToBaseXValue: | ||||||
8196 | case SK_CastDerivedToBaseLValue: { | ||||||
8197 | // We have a derived-to-base cast that produces either an rvalue or an | ||||||
8198 | // lvalue. Perform that cast. | ||||||
8199 | |||||||
8200 | CXXCastPath BasePath; | ||||||
8201 | |||||||
8202 | // Casts to inaccessible base classes are allowed with C-style casts. | ||||||
8203 | bool IgnoreBaseAccess = Kind.isCStyleOrFunctionalCast(); | ||||||
8204 | if (S.CheckDerivedToBaseConversion( | ||||||
8205 | SourceType, Step->Type, CurInit.get()->getBeginLoc(), | ||||||
8206 | CurInit.get()->getSourceRange(), &BasePath, IgnoreBaseAccess)) | ||||||
8207 | return ExprError(); | ||||||
8208 | |||||||
8209 | ExprValueKind VK = | ||||||
8210 | Step->Kind == SK_CastDerivedToBaseLValue | ||||||
8211 | ? VK_LValue | ||||||
8212 | : (Step->Kind == SK_CastDerivedToBaseXValue ? VK_XValue | ||||||
8213 | : VK_PRValue); | ||||||
8214 | CurInit = ImplicitCastExpr::Create(S.Context, Step->Type, | ||||||
8215 | CK_DerivedToBase, CurInit.get(), | ||||||
8216 | &BasePath, VK, FPOptionsOverride()); | ||||||
8217 | break; | ||||||
8218 | } | ||||||
8219 | |||||||
8220 | case SK_BindReference: | ||||||
8221 | // Reference binding does not have any corresponding ASTs. | ||||||
8222 | |||||||
8223 | // Check exception specifications | ||||||
8224 | if (S.CheckExceptionSpecCompatibility(CurInit.get(), DestType)) | ||||||
8225 | return ExprError(); | ||||||
8226 | |||||||
8227 | // We don't check for e.g. function pointers here, since address | ||||||
8228 | // availability checks should only occur when the function first decays | ||||||
8229 | // into a pointer or reference. | ||||||
8230 | if (CurInit.get()->getType()->isFunctionProtoType()) { | ||||||
8231 | if (auto *DRE = dyn_cast<DeclRefExpr>(CurInit.get()->IgnoreParens())) { | ||||||
8232 | if (auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl())) { | ||||||
8233 | if (!S.checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | ||||||
8234 | DRE->getBeginLoc())) | ||||||
8235 | return ExprError(); | ||||||
8236 | } | ||||||
8237 | } | ||||||
8238 | } | ||||||
8239 | |||||||
8240 | CheckForNullPointerDereference(S, CurInit.get()); | ||||||
8241 | break; | ||||||
8242 | |||||||
8243 | case SK_BindReferenceToTemporary: { | ||||||
8244 | // Make sure the "temporary" is actually an rvalue. | ||||||
8245 | assert(CurInit.get()->isPRValue() && "not a temporary")(static_cast <bool> (CurInit.get()->isPRValue() && "not a temporary") ? void (0) : __assert_fail ("CurInit.get()->isPRValue() && \"not a temporary\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8245, __extension__ __PRETTY_FUNCTION__)); | ||||||
8246 | |||||||
8247 | // Check exception specifications | ||||||
8248 | if (S.CheckExceptionSpecCompatibility(CurInit.get(), DestType)) | ||||||
8249 | return ExprError(); | ||||||
8250 | |||||||
8251 | QualType MTETy = Step->Type; | ||||||
8252 | |||||||
8253 | // When this is an incomplete array type (such as when this is | ||||||
8254 | // initializing an array of unknown bounds from an init list), use THAT | ||||||
8255 | // type instead so that we propogate the array bounds. | ||||||
8256 | if (MTETy->isIncompleteArrayType() && | ||||||
8257 | !CurInit.get()->getType()->isIncompleteArrayType() && | ||||||
8258 | S.Context.hasSameType( | ||||||
8259 | MTETy->getPointeeOrArrayElementType(), | ||||||
8260 | CurInit.get()->getType()->getPointeeOrArrayElementType())) | ||||||
8261 | MTETy = CurInit.get()->getType(); | ||||||
8262 | |||||||
8263 | // Materialize the temporary into memory. | ||||||
8264 | MaterializeTemporaryExpr *MTE = S.CreateMaterializeTemporaryExpr( | ||||||
8265 | MTETy, CurInit.get(), Entity.getType()->isLValueReferenceType()); | ||||||
8266 | CurInit = MTE; | ||||||
8267 | |||||||
8268 | // If we're extending this temporary to automatic storage duration -- we | ||||||
8269 | // need to register its cleanup during the full-expression's cleanups. | ||||||
8270 | if (MTE->getStorageDuration() == SD_Automatic && | ||||||
8271 | MTE->getType().isDestructedType()) | ||||||
8272 | S.Cleanup.setExprNeedsCleanups(true); | ||||||
8273 | break; | ||||||
8274 | } | ||||||
8275 | |||||||
8276 | case SK_FinalCopy: | ||||||
8277 | if (checkAbstractType(Step->Type)) | ||||||
8278 | return ExprError(); | ||||||
8279 | |||||||
8280 | // If the overall initialization is initializing a temporary, we already | ||||||
8281 | // bound our argument if it was necessary to do so. If not (if we're | ||||||
8282 | // ultimately initializing a non-temporary), our argument needs to be | ||||||
8283 | // bound since it's initializing a function parameter. | ||||||
8284 | // FIXME: This is a mess. Rationalize temporary destruction. | ||||||
8285 | if (!shouldBindAsTemporary(Entity)) | ||||||
8286 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||||
8287 | CurInit = CopyObject(S, Step->Type, Entity, CurInit, | ||||||
8288 | /*IsExtraneousCopy=*/false); | ||||||
8289 | break; | ||||||
8290 | |||||||
8291 | case SK_ExtraneousCopyToTemporary: | ||||||
8292 | CurInit = CopyObject(S, Step->Type, Entity, CurInit, | ||||||
8293 | /*IsExtraneousCopy=*/true); | ||||||
8294 | break; | ||||||
8295 | |||||||
8296 | case SK_UserConversion: { | ||||||
8297 | // We have a user-defined conversion that invokes either a constructor | ||||||
8298 | // or a conversion function. | ||||||
8299 | CastKind CastKind; | ||||||
8300 | FunctionDecl *Fn = Step->Function.Function; | ||||||
8301 | DeclAccessPair FoundFn = Step->Function.FoundDecl; | ||||||
8302 | bool HadMultipleCandidates = Step->Function.HadMultipleCandidates; | ||||||
8303 | bool CreatedObject = false; | ||||||
8304 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Fn)) { | ||||||
8305 | // Build a call to the selected constructor. | ||||||
8306 | SmallVector<Expr*, 8> ConstructorArgs; | ||||||
8307 | SourceLocation Loc = CurInit.get()->getBeginLoc(); | ||||||
8308 | |||||||
8309 | // Determine the arguments required to actually perform the constructor | ||||||
8310 | // call. | ||||||
8311 | Expr *Arg = CurInit.get(); | ||||||
8312 | if (S.CompleteConstructorCall(Constructor, Step->Type, | ||||||
8313 | MultiExprArg(&Arg, 1), Loc, | ||||||
8314 | ConstructorArgs)) | ||||||
8315 | return ExprError(); | ||||||
8316 | |||||||
8317 | // Build an expression that constructs a temporary. | ||||||
8318 | CurInit = S.BuildCXXConstructExpr(Loc, Step->Type, | ||||||
8319 | FoundFn, Constructor, | ||||||
8320 | ConstructorArgs, | ||||||
8321 | HadMultipleCandidates, | ||||||
8322 | /*ListInit*/ false, | ||||||
8323 | /*StdInitListInit*/ false, | ||||||
8324 | /*ZeroInit*/ false, | ||||||
8325 | CXXConstructExpr::CK_Complete, | ||||||
8326 | SourceRange()); | ||||||
8327 | if (CurInit.isInvalid()) | ||||||
8328 | return ExprError(); | ||||||
8329 | |||||||
8330 | S.CheckConstructorAccess(Kind.getLocation(), Constructor, FoundFn, | ||||||
8331 | Entity); | ||||||
8332 | if (S.DiagnoseUseOfDecl(FoundFn, Kind.getLocation())) | ||||||
8333 | return ExprError(); | ||||||
8334 | |||||||
8335 | CastKind = CK_ConstructorConversion; | ||||||
8336 | CreatedObject = true; | ||||||
8337 | } else { | ||||||
8338 | // Build a call to the conversion function. | ||||||
8339 | CXXConversionDecl *Conversion = cast<CXXConversionDecl>(Fn); | ||||||
8340 | S.CheckMemberOperatorAccess(Kind.getLocation(), CurInit.get(), nullptr, | ||||||
8341 | FoundFn); | ||||||
8342 | if (S.DiagnoseUseOfDecl(FoundFn, Kind.getLocation())) | ||||||
8343 | return ExprError(); | ||||||
8344 | |||||||
8345 | CurInit = S.BuildCXXMemberCallExpr(CurInit.get(), FoundFn, Conversion, | ||||||
8346 | HadMultipleCandidates); | ||||||
8347 | if (CurInit.isInvalid()) | ||||||
8348 | return ExprError(); | ||||||
8349 | |||||||
8350 | CastKind = CK_UserDefinedConversion; | ||||||
8351 | CreatedObject = Conversion->getReturnType()->isRecordType(); | ||||||
8352 | } | ||||||
8353 | |||||||
8354 | if (CreatedObject && checkAbstractType(CurInit.get()->getType())) | ||||||
8355 | return ExprError(); | ||||||
8356 | |||||||
8357 | CurInit = ImplicitCastExpr::Create( | ||||||
8358 | S.Context, CurInit.get()->getType(), CastKind, CurInit.get(), nullptr, | ||||||
8359 | CurInit.get()->getValueKind(), S.CurFPFeatureOverrides()); | ||||||
8360 | |||||||
8361 | if (shouldBindAsTemporary(Entity)) | ||||||
8362 | // The overall entity is temporary, so this expression should be | ||||||
8363 | // destroyed at the end of its full-expression. | ||||||
8364 | CurInit = S.MaybeBindToTemporary(CurInit.getAs<Expr>()); | ||||||
8365 | else if (CreatedObject && shouldDestroyEntity(Entity)) { | ||||||
8366 | // The object outlasts the full-expression, but we need to prepare for | ||||||
8367 | // a destructor being run on it. | ||||||
8368 | // FIXME: It makes no sense to do this here. This should happen | ||||||
8369 | // regardless of how we initialized the entity. | ||||||
8370 | QualType T = CurInit.get()->getType(); | ||||||
8371 | if (const RecordType *Record = T->getAs<RecordType>()) { | ||||||
8372 | CXXDestructorDecl *Destructor | ||||||
8373 | = S.LookupDestructor(cast<CXXRecordDecl>(Record->getDecl())); | ||||||
8374 | S.CheckDestructorAccess(CurInit.get()->getBeginLoc(), Destructor, | ||||||
8375 | S.PDiag(diag::err_access_dtor_temp) << T); | ||||||
8376 | S.MarkFunctionReferenced(CurInit.get()->getBeginLoc(), Destructor); | ||||||
8377 | if (S.DiagnoseUseOfDecl(Destructor, CurInit.get()->getBeginLoc())) | ||||||
8378 | return ExprError(); | ||||||
8379 | } | ||||||
8380 | } | ||||||
8381 | break; | ||||||
8382 | } | ||||||
8383 | |||||||
8384 | case SK_QualificationConversionLValue: | ||||||
8385 | case SK_QualificationConversionXValue: | ||||||
8386 | case SK_QualificationConversionPRValue: { | ||||||
8387 | // Perform a qualification conversion; these can never go wrong. | ||||||
8388 | ExprValueKind VK = | ||||||
8389 | Step->Kind == SK_QualificationConversionLValue | ||||||
8390 | ? VK_LValue | ||||||
8391 | : (Step->Kind == SK_QualificationConversionXValue ? VK_XValue | ||||||
8392 | : VK_PRValue); | ||||||
8393 | CurInit = S.PerformQualificationConversion(CurInit.get(), Step->Type, VK); | ||||||
8394 | break; | ||||||
8395 | } | ||||||
8396 | |||||||
8397 | case SK_FunctionReferenceConversion: | ||||||
8398 | assert(CurInit.get()->isLValue() &&(static_cast <bool> (CurInit.get()->isLValue() && "function reference should be lvalue") ? void (0) : __assert_fail ("CurInit.get()->isLValue() && \"function reference should be lvalue\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8399, __extension__ __PRETTY_FUNCTION__)) | ||||||
8399 | "function reference should be lvalue")(static_cast <bool> (CurInit.get()->isLValue() && "function reference should be lvalue") ? void (0) : __assert_fail ("CurInit.get()->isLValue() && \"function reference should be lvalue\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8399, __extension__ __PRETTY_FUNCTION__)); | ||||||
8400 | CurInit = | ||||||
8401 | S.ImpCastExprToType(CurInit.get(), Step->Type, CK_NoOp, VK_LValue); | ||||||
8402 | break; | ||||||
8403 | |||||||
8404 | case SK_AtomicConversion: { | ||||||
8405 | assert(CurInit.get()->isPRValue() && "cannot convert glvalue to atomic")(static_cast <bool> (CurInit.get()->isPRValue() && "cannot convert glvalue to atomic") ? void (0) : __assert_fail ("CurInit.get()->isPRValue() && \"cannot convert glvalue to atomic\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8405, __extension__ __PRETTY_FUNCTION__)); | ||||||
8406 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||||
8407 | CK_NonAtomicToAtomic, VK_PRValue); | ||||||
8408 | break; | ||||||
8409 | } | ||||||
8410 | |||||||
8411 | case SK_ConversionSequence: | ||||||
8412 | case SK_ConversionSequenceNoNarrowing: { | ||||||
8413 | if (const auto *FromPtrType = | ||||||
8414 | CurInit.get()->getType()->getAs<PointerType>()) { | ||||||
8415 | if (const auto *ToPtrType = Step->Type->getAs<PointerType>()) { | ||||||
8416 | if (FromPtrType->getPointeeType()->hasAttr(attr::NoDeref) && | ||||||
8417 | !ToPtrType->getPointeeType()->hasAttr(attr::NoDeref)) { | ||||||
8418 | // Do not check static casts here because they are checked earlier | ||||||
8419 | // in Sema::ActOnCXXNamedCast() | ||||||
8420 | if (!Kind.isStaticCast()) { | ||||||
8421 | S.Diag(CurInit.get()->getExprLoc(), | ||||||
8422 | diag::warn_noderef_to_dereferenceable_pointer) | ||||||
8423 | << CurInit.get()->getSourceRange(); | ||||||
8424 | } | ||||||
8425 | } | ||||||
8426 | } | ||||||
8427 | } | ||||||
8428 | |||||||
8429 | Sema::CheckedConversionKind CCK | ||||||
8430 | = Kind.isCStyleCast()? Sema::CCK_CStyleCast | ||||||
8431 | : Kind.isFunctionalCast()? Sema::CCK_FunctionalCast | ||||||
8432 | : Kind.isExplicitCast()? Sema::CCK_OtherCast | ||||||
8433 | : Sema::CCK_ImplicitConversion; | ||||||
8434 | ExprResult CurInitExprRes = | ||||||
8435 | S.PerformImplicitConversion(CurInit.get(), Step->Type, *Step->ICS, | ||||||
8436 | getAssignmentAction(Entity), CCK); | ||||||
8437 | if (CurInitExprRes.isInvalid()) | ||||||
8438 | return ExprError(); | ||||||
8439 | |||||||
8440 | S.DiscardMisalignedMemberAddress(Step->Type.getTypePtr(), CurInit.get()); | ||||||
8441 | |||||||
8442 | CurInit = CurInitExprRes; | ||||||
8443 | |||||||
8444 | if (Step->Kind == SK_ConversionSequenceNoNarrowing && | ||||||
8445 | S.getLangOpts().CPlusPlus) | ||||||
8446 | DiagnoseNarrowingInInitList(S, *Step->ICS, SourceType, Entity.getType(), | ||||||
8447 | CurInit.get()); | ||||||
8448 | |||||||
8449 | break; | ||||||
8450 | } | ||||||
8451 | |||||||
8452 | case SK_ListInitialization: { | ||||||
8453 | if (checkAbstractType(Step->Type)) | ||||||
8454 | return ExprError(); | ||||||
8455 | |||||||
8456 | InitListExpr *InitList = cast<InitListExpr>(CurInit.get()); | ||||||
8457 | // If we're not initializing the top-level entity, we need to create an | ||||||
8458 | // InitializeTemporary entity for our target type. | ||||||
8459 | QualType Ty = Step->Type; | ||||||
8460 | bool IsTemporary = !S.Context.hasSameType(Entity.getType(), Ty); | ||||||
8461 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary(Ty); | ||||||
8462 | InitializedEntity InitEntity = IsTemporary ? TempEntity : Entity; | ||||||
8463 | InitListChecker PerformInitList(S, InitEntity, | ||||||
8464 | InitList, Ty, /*VerifyOnly=*/false, | ||||||
8465 | /*TreatUnavailableAsInvalid=*/false); | ||||||
8466 | if (PerformInitList.HadError()) | ||||||
8467 | return ExprError(); | ||||||
8468 | |||||||
8469 | // Hack: We must update *ResultType if available in order to set the | ||||||
8470 | // bounds of arrays, e.g. in 'int ar[] = {1, 2, 3};'. | ||||||
8471 | // Worst case: 'const int (&arref)[] = {1, 2, 3};'. | ||||||
8472 | if (ResultType && | ||||||
8473 | ResultType->getNonReferenceType()->isIncompleteArrayType()) { | ||||||
8474 | if ((*ResultType)->isRValueReferenceType()) | ||||||
8475 | Ty = S.Context.getRValueReferenceType(Ty); | ||||||
8476 | else if ((*ResultType)->isLValueReferenceType()) | ||||||
8477 | Ty = S.Context.getLValueReferenceType(Ty, | ||||||
8478 | (*ResultType)->castAs<LValueReferenceType>()->isSpelledAsLValue()); | ||||||
8479 | *ResultType = Ty; | ||||||
8480 | } | ||||||
8481 | |||||||
8482 | InitListExpr *StructuredInitList = | ||||||
8483 | PerformInitList.getFullyStructuredList(); | ||||||
8484 | CurInit.get(); | ||||||
8485 | CurInit = shouldBindAsTemporary(InitEntity) | ||||||
8486 | ? S.MaybeBindToTemporary(StructuredInitList) | ||||||
8487 | : StructuredInitList; | ||||||
8488 | break; | ||||||
8489 | } | ||||||
8490 | |||||||
8491 | case SK_ConstructorInitializationFromList: { | ||||||
8492 | if (checkAbstractType(Step->Type)) | ||||||
8493 | return ExprError(); | ||||||
8494 | |||||||
8495 | // When an initializer list is passed for a parameter of type "reference | ||||||
8496 | // to object", we don't get an EK_Temporary entity, but instead an | ||||||
8497 | // EK_Parameter entity with reference type. | ||||||
8498 | // FIXME: This is a hack. What we really should do is create a user | ||||||
8499 | // conversion step for this case, but this makes it considerably more | ||||||
8500 | // complicated. For now, this will do. | ||||||
8501 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary( | ||||||
8502 | Entity.getType().getNonReferenceType()); | ||||||
8503 | bool UseTemporary = Entity.getType()->isReferenceType(); | ||||||
8504 | assert(Args.size() == 1 && "expected a single argument for list init")(static_cast <bool> (Args.size() == 1 && "expected a single argument for list init" ) ? void (0) : __assert_fail ("Args.size() == 1 && \"expected a single argument for list init\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8504, __extension__ __PRETTY_FUNCTION__)); | ||||||
8505 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||||
8506 | S.Diag(InitList->getExprLoc(), diag::warn_cxx98_compat_ctor_list_init) | ||||||
8507 | << InitList->getSourceRange(); | ||||||
8508 | MultiExprArg Arg(InitList->getInits(), InitList->getNumInits()); | ||||||
8509 | CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity : | ||||||
8510 | Entity, | ||||||
8511 | Kind, Arg, *Step, | ||||||
8512 | ConstructorInitRequiresZeroInit, | ||||||
8513 | /*IsListInitialization*/true, | ||||||
8514 | /*IsStdInitListInit*/false, | ||||||
8515 | InitList->getLBraceLoc(), | ||||||
8516 | InitList->getRBraceLoc()); | ||||||
8517 | break; | ||||||
8518 | } | ||||||
8519 | |||||||
8520 | case SK_UnwrapInitList: | ||||||
8521 | CurInit = cast<InitListExpr>(CurInit.get())->getInit(0); | ||||||
8522 | break; | ||||||
8523 | |||||||
8524 | case SK_RewrapInitList: { | ||||||
8525 | Expr *E = CurInit.get(); | ||||||
8526 | InitListExpr *Syntactic = Step->WrappingSyntacticList; | ||||||
8527 | InitListExpr *ILE = new (S.Context) InitListExpr(S.Context, | ||||||
8528 | Syntactic->getLBraceLoc(), E, Syntactic->getRBraceLoc()); | ||||||
8529 | ILE->setSyntacticForm(Syntactic); | ||||||
8530 | ILE->setType(E->getType()); | ||||||
8531 | ILE->setValueKind(E->getValueKind()); | ||||||
8532 | CurInit = ILE; | ||||||
8533 | break; | ||||||
8534 | } | ||||||
8535 | |||||||
8536 | case SK_ConstructorInitialization: | ||||||
8537 | case SK_StdInitializerListConstructorCall: { | ||||||
8538 | if (checkAbstractType(Step->Type)) | ||||||
8539 | return ExprError(); | ||||||
8540 | |||||||
8541 | // When an initializer list is passed for a parameter of type "reference | ||||||
8542 | // to object", we don't get an EK_Temporary entity, but instead an | ||||||
8543 | // EK_Parameter entity with reference type. | ||||||
8544 | // FIXME: This is a hack. What we really should do is create a user | ||||||
8545 | // conversion step for this case, but this makes it considerably more | ||||||
8546 | // complicated. For now, this will do. | ||||||
8547 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary( | ||||||
8548 | Entity.getType().getNonReferenceType()); | ||||||
8549 | bool UseTemporary = Entity.getType()->isReferenceType(); | ||||||
8550 | bool IsStdInitListInit = | ||||||
8551 | Step->Kind == SK_StdInitializerListConstructorCall; | ||||||
8552 | Expr *Source = CurInit.get(); | ||||||
8553 | SourceRange Range = Kind.hasParenOrBraceRange() | ||||||
8554 | ? Kind.getParenOrBraceRange() | ||||||
8555 | : SourceRange(); | ||||||
8556 | CurInit = PerformConstructorInitialization( | ||||||
8557 | S, UseTemporary ? TempEntity : Entity, Kind, | ||||||
8558 | Source ? MultiExprArg(Source) : Args, *Step, | ||||||
8559 | ConstructorInitRequiresZeroInit, | ||||||
8560 | /*IsListInitialization*/ IsStdInitListInit, | ||||||
8561 | /*IsStdInitListInitialization*/ IsStdInitListInit, | ||||||
8562 | /*LBraceLoc*/ Range.getBegin(), | ||||||
8563 | /*RBraceLoc*/ Range.getEnd()); | ||||||
8564 | break; | ||||||
8565 | } | ||||||
8566 | |||||||
8567 | case SK_ZeroInitialization: { | ||||||
8568 | step_iterator NextStep = Step; | ||||||
8569 | ++NextStep; | ||||||
8570 | if (NextStep != StepEnd && | ||||||
8571 | (NextStep->Kind == SK_ConstructorInitialization || | ||||||
8572 | NextStep->Kind == SK_ConstructorInitializationFromList)) { | ||||||
8573 | // The need for zero-initialization is recorded directly into | ||||||
8574 | // the call to the object's constructor within the next step. | ||||||
8575 | ConstructorInitRequiresZeroInit = true; | ||||||
8576 | } else if (Kind.getKind() == InitializationKind::IK_Value && | ||||||
8577 | S.getLangOpts().CPlusPlus && | ||||||
8578 | !Kind.isImplicitValueInit()) { | ||||||
8579 | TypeSourceInfo *TSInfo = Entity.getTypeSourceInfo(); | ||||||
8580 | if (!TSInfo) | ||||||
8581 | TSInfo = S.Context.getTrivialTypeSourceInfo(Step->Type, | ||||||
8582 | Kind.getRange().getBegin()); | ||||||
8583 | |||||||
8584 | CurInit = new (S.Context) CXXScalarValueInitExpr( | ||||||
8585 | Entity.getType().getNonLValueExprType(S.Context), TSInfo, | ||||||
8586 | Kind.getRange().getEnd()); | ||||||
8587 | } else { | ||||||
8588 | CurInit = new (S.Context) ImplicitValueInitExpr(Step->Type); | ||||||
8589 | } | ||||||
8590 | break; | ||||||
8591 | } | ||||||
8592 | |||||||
8593 | case SK_CAssignment: { | ||||||
8594 | QualType SourceType = CurInit.get()->getType(); | ||||||
8595 | |||||||
8596 | // Save off the initial CurInit in case we need to emit a diagnostic | ||||||
8597 | ExprResult InitialCurInit = CurInit; | ||||||
8598 | ExprResult Result = CurInit; | ||||||
8599 | Sema::AssignConvertType ConvTy = | ||||||
8600 | S.CheckSingleAssignmentConstraints(Step->Type, Result, true, | ||||||
8601 | Entity.getKind() == InitializedEntity::EK_Parameter_CF_Audited); | ||||||
8602 | if (Result.isInvalid()) | ||||||
8603 | return ExprError(); | ||||||
8604 | CurInit = Result; | ||||||
8605 | |||||||
8606 | // If this is a call, allow conversion to a transparent union. | ||||||
8607 | ExprResult CurInitExprRes = CurInit; | ||||||
8608 | if (ConvTy != Sema::Compatible && | ||||||
8609 | Entity.isParameterKind() && | ||||||
8610 | S.CheckTransparentUnionArgumentConstraints(Step->Type, CurInitExprRes) | ||||||
8611 | == Sema::Compatible) | ||||||
8612 | ConvTy = Sema::Compatible; | ||||||
8613 | if (CurInitExprRes.isInvalid()) | ||||||
8614 | return ExprError(); | ||||||
8615 | CurInit = CurInitExprRes; | ||||||
8616 | |||||||
8617 | bool Complained; | ||||||
8618 | if (S.DiagnoseAssignmentResult(ConvTy, Kind.getLocation(), | ||||||
8619 | Step->Type, SourceType, | ||||||
8620 | InitialCurInit.get(), | ||||||
8621 | getAssignmentAction(Entity, true), | ||||||
8622 | &Complained)) { | ||||||
8623 | PrintInitLocationNote(S, Entity); | ||||||
8624 | return ExprError(); | ||||||
8625 | } else if (Complained) | ||||||
8626 | PrintInitLocationNote(S, Entity); | ||||||
8627 | break; | ||||||
8628 | } | ||||||
8629 | |||||||
8630 | case SK_StringInit: { | ||||||
8631 | QualType Ty = Step->Type; | ||||||
8632 | bool UpdateType = ResultType && Entity.getType()->isIncompleteArrayType(); | ||||||
8633 | CheckStringInit(CurInit.get(), UpdateType ? *ResultType : Ty, | ||||||
8634 | S.Context.getAsArrayType(Ty), S); | ||||||
8635 | break; | ||||||
8636 | } | ||||||
8637 | |||||||
8638 | case SK_ObjCObjectConversion: | ||||||
8639 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||||
8640 | CK_ObjCObjectLValueCast, | ||||||
8641 | CurInit.get()->getValueKind()); | ||||||
8642 | break; | ||||||
8643 | |||||||
8644 | case SK_ArrayLoopIndex: { | ||||||
8645 | Expr *Cur = CurInit.get(); | ||||||
8646 | Expr *BaseExpr = new (S.Context) | ||||||
8647 | OpaqueValueExpr(Cur->getExprLoc(), Cur->getType(), | ||||||
8648 | Cur->getValueKind(), Cur->getObjectKind(), Cur); | ||||||
8649 | Expr *IndexExpr = | ||||||
8650 | new (S.Context) ArrayInitIndexExpr(S.Context.getSizeType()); | ||||||
8651 | CurInit = S.CreateBuiltinArraySubscriptExpr( | ||||||
8652 | BaseExpr, Kind.getLocation(), IndexExpr, Kind.getLocation()); | ||||||
8653 | ArrayLoopCommonExprs.push_back(BaseExpr); | ||||||
8654 | break; | ||||||
8655 | } | ||||||
8656 | |||||||
8657 | case SK_ArrayLoopInit: { | ||||||
8658 | assert(!ArrayLoopCommonExprs.empty() &&(static_cast <bool> (!ArrayLoopCommonExprs.empty() && "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit") ? void ( 0) : __assert_fail ("!ArrayLoopCommonExprs.empty() && \"mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8659, __extension__ __PRETTY_FUNCTION__)) | ||||||
8659 | "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit")(static_cast <bool> (!ArrayLoopCommonExprs.empty() && "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit") ? void ( 0) : __assert_fail ("!ArrayLoopCommonExprs.empty() && \"mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8659, __extension__ __PRETTY_FUNCTION__)); | ||||||
8660 | Expr *Common = ArrayLoopCommonExprs.pop_back_val(); | ||||||
8661 | CurInit = new (S.Context) ArrayInitLoopExpr(Step->Type, Common, | ||||||
8662 | CurInit.get()); | ||||||
8663 | break; | ||||||
8664 | } | ||||||
8665 | |||||||
8666 | case SK_GNUArrayInit: | ||||||
8667 | // Okay: we checked everything before creating this step. Note that | ||||||
8668 | // this is a GNU extension. | ||||||
8669 | S.Diag(Kind.getLocation(), diag::ext_array_init_copy) | ||||||
8670 | << Step->Type << CurInit.get()->getType() | ||||||
8671 | << CurInit.get()->getSourceRange(); | ||||||
8672 | updateGNUCompoundLiteralRValue(CurInit.get()); | ||||||
8673 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
8674 | case SK_ArrayInit: | ||||||
8675 | // If the destination type is an incomplete array type, update the | ||||||
8676 | // type accordingly. | ||||||
8677 | if (ResultType) { | ||||||
8678 | if (const IncompleteArrayType *IncompleteDest | ||||||
8679 | = S.Context.getAsIncompleteArrayType(Step->Type)) { | ||||||
8680 | if (const ConstantArrayType *ConstantSource | ||||||
8681 | = S.Context.getAsConstantArrayType(CurInit.get()->getType())) { | ||||||
8682 | *ResultType = S.Context.getConstantArrayType( | ||||||
8683 | IncompleteDest->getElementType(), | ||||||
8684 | ConstantSource->getSize(), | ||||||
8685 | ConstantSource->getSizeExpr(), | ||||||
8686 | ArrayType::Normal, 0); | ||||||
8687 | } | ||||||
8688 | } | ||||||
8689 | } | ||||||
8690 | break; | ||||||
8691 | |||||||
8692 | case SK_ParenthesizedArrayInit: | ||||||
8693 | // Okay: we checked everything before creating this step. Note that | ||||||
8694 | // this is a GNU extension. | ||||||
8695 | S.Diag(Kind.getLocation(), diag::ext_array_init_parens) | ||||||
8696 | << CurInit.get()->getSourceRange(); | ||||||
8697 | break; | ||||||
8698 | |||||||
8699 | case SK_PassByIndirectCopyRestore: | ||||||
8700 | case SK_PassByIndirectRestore: | ||||||
8701 | checkIndirectCopyRestoreSource(S, CurInit.get()); | ||||||
8702 | CurInit = new (S.Context) ObjCIndirectCopyRestoreExpr( | ||||||
8703 | CurInit.get(), Step->Type, | ||||||
8704 | Step->Kind == SK_PassByIndirectCopyRestore); | ||||||
8705 | break; | ||||||
8706 | |||||||
8707 | case SK_ProduceObjCObject: | ||||||
8708 | CurInit = ImplicitCastExpr::Create( | ||||||
8709 | S.Context, Step->Type, CK_ARCProduceObject, CurInit.get(), nullptr, | ||||||
8710 | VK_PRValue, FPOptionsOverride()); | ||||||
8711 | break; | ||||||
8712 | |||||||
8713 | case SK_StdInitializerList: { | ||||||
8714 | S.Diag(CurInit.get()->getExprLoc(), | ||||||
8715 | diag::warn_cxx98_compat_initializer_list_init) | ||||||
8716 | << CurInit.get()->getSourceRange(); | ||||||
8717 | |||||||
8718 | // Materialize the temporary into memory. | ||||||
8719 | MaterializeTemporaryExpr *MTE = S.CreateMaterializeTemporaryExpr( | ||||||
8720 | CurInit.get()->getType(), CurInit.get(), | ||||||
8721 | /*BoundToLvalueReference=*/false); | ||||||
8722 | |||||||
8723 | // Wrap it in a construction of a std::initializer_list<T>. | ||||||
8724 | CurInit = new (S.Context) CXXStdInitializerListExpr(Step->Type, MTE); | ||||||
8725 | |||||||
8726 | // Bind the result, in case the library has given initializer_list a | ||||||
8727 | // non-trivial destructor. | ||||||
8728 | if (shouldBindAsTemporary(Entity)) | ||||||
8729 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||||
8730 | break; | ||||||
8731 | } | ||||||
8732 | |||||||
8733 | case SK_OCLSamplerInit: { | ||||||
8734 | // Sampler initialization have 5 cases: | ||||||
8735 | // 1. function argument passing | ||||||
8736 | // 1a. argument is a file-scope variable | ||||||
8737 | // 1b. argument is a function-scope variable | ||||||
8738 | // 1c. argument is one of caller function's parameters | ||||||
8739 | // 2. variable initialization | ||||||
8740 | // 2a. initializing a file-scope variable | ||||||
8741 | // 2b. initializing a function-scope variable | ||||||
8742 | // | ||||||
8743 | // For file-scope variables, since they cannot be initialized by function | ||||||
8744 | // call of __translate_sampler_initializer in LLVM IR, their references | ||||||
8745 | // need to be replaced by a cast from their literal initializers to | ||||||
8746 | // sampler type. Since sampler variables can only be used in function | ||||||
8747 | // calls as arguments, we only need to replace them when handling the | ||||||
8748 | // argument passing. | ||||||
8749 | assert(Step->Type->isSamplerT() &&(static_cast <bool> (Step->Type->isSamplerT() && "Sampler initialization on non-sampler type.") ? void (0) : __assert_fail ("Step->Type->isSamplerT() && \"Sampler initialization on non-sampler type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)) | ||||||
8750 | "Sampler initialization on non-sampler type.")(static_cast <bool> (Step->Type->isSamplerT() && "Sampler initialization on non-sampler type.") ? void (0) : __assert_fail ("Step->Type->isSamplerT() && \"Sampler initialization on non-sampler type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)); | ||||||
8751 | Expr *Init = CurInit.get()->IgnoreParens(); | ||||||
8752 | QualType SourceType = Init->getType(); | ||||||
8753 | // Case 1 | ||||||
8754 | if (Entity.isParameterKind()) { | ||||||
8755 | if (!SourceType->isSamplerT() && !SourceType->isIntegerType()) { | ||||||
8756 | S.Diag(Kind.getLocation(), diag::err_sampler_argument_required) | ||||||
8757 | << SourceType; | ||||||
8758 | break; | ||||||
8759 | } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Init)) { | ||||||
8760 | auto Var = cast<VarDecl>(DRE->getDecl()); | ||||||
8761 | // Case 1b and 1c | ||||||
8762 | // No cast from integer to sampler is needed. | ||||||
8763 | if (!Var->hasGlobalStorage()) { | ||||||
8764 | CurInit = ImplicitCastExpr::Create( | ||||||
8765 | S.Context, Step->Type, CK_LValueToRValue, Init, | ||||||
8766 | /*BasePath=*/nullptr, VK_PRValue, FPOptionsOverride()); | ||||||
8767 | break; | ||||||
8768 | } | ||||||
8769 | // Case 1a | ||||||
8770 | // For function call with a file-scope sampler variable as argument, | ||||||
8771 | // get the integer literal. | ||||||
8772 | // Do not diagnose if the file-scope variable does not have initializer | ||||||
8773 | // since this has already been diagnosed when parsing the variable | ||||||
8774 | // declaration. | ||||||
8775 | if (!Var->getInit() || !isa<ImplicitCastExpr>(Var->getInit())) | ||||||
8776 | break; | ||||||
8777 | Init = cast<ImplicitCastExpr>(const_cast<Expr*>( | ||||||
8778 | Var->getInit()))->getSubExpr(); | ||||||
8779 | SourceType = Init->getType(); | ||||||
8780 | } | ||||||
8781 | } else { | ||||||
8782 | // Case 2 | ||||||
8783 | // Check initializer is 32 bit integer constant. | ||||||
8784 | // If the initializer is taken from global variable, do not diagnose since | ||||||
8785 | // this has already been done when parsing the variable declaration. | ||||||
8786 | if (!Init->isConstantInitializer(S.Context, false)) | ||||||
8787 | break; | ||||||
8788 | |||||||
8789 | if (!SourceType->isIntegerType() || | ||||||
8790 | 32 != S.Context.getIntWidth(SourceType)) { | ||||||
8791 | S.Diag(Kind.getLocation(), diag::err_sampler_initializer_not_integer) | ||||||
8792 | << SourceType; | ||||||
8793 | break; | ||||||
8794 | } | ||||||
8795 | |||||||
8796 | Expr::EvalResult EVResult; | ||||||
8797 | Init->EvaluateAsInt(EVResult, S.Context); | ||||||
8798 | llvm::APSInt Result = EVResult.Val.getInt(); | ||||||
8799 | const uint64_t SamplerValue = Result.getLimitedValue(); | ||||||
8800 | // 32-bit value of sampler's initializer is interpreted as | ||||||
8801 | // bit-field with the following structure: | ||||||
8802 | // |unspecified|Filter|Addressing Mode| Normalized Coords| | ||||||
8803 | // |31 6|5 4|3 1| 0| | ||||||
8804 | // This structure corresponds to enum values of sampler properties | ||||||
8805 | // defined in SPIR spec v1.2 and also opencl-c.h | ||||||
8806 | unsigned AddressingMode = (0x0E & SamplerValue) >> 1; | ||||||
8807 | unsigned FilterMode = (0x30 & SamplerValue) >> 4; | ||||||
8808 | if (FilterMode != 1 && FilterMode != 2 && | ||||||
8809 | !S.getOpenCLOptions().isAvailableOption( | ||||||
8810 | "cl_intel_device_side_avc_motion_estimation", S.getLangOpts())) | ||||||
8811 | S.Diag(Kind.getLocation(), | ||||||
8812 | diag::warn_sampler_initializer_invalid_bits) | ||||||
8813 | << "Filter Mode"; | ||||||
8814 | if (AddressingMode > 4) | ||||||
8815 | S.Diag(Kind.getLocation(), | ||||||
8816 | diag::warn_sampler_initializer_invalid_bits) | ||||||
8817 | << "Addressing Mode"; | ||||||
8818 | } | ||||||
8819 | |||||||
8820 | // Cases 1a, 2a and 2b | ||||||
8821 | // Insert cast from integer to sampler. | ||||||
8822 | CurInit = S.ImpCastExprToType(Init, S.Context.OCLSamplerTy, | ||||||
8823 | CK_IntToOCLSampler); | ||||||
8824 | break; | ||||||
8825 | } | ||||||
8826 | case SK_OCLZeroOpaqueType: { | ||||||
8827 | assert((Step->Type->isEventT() || Step->Type->isQueueT() ||(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)) | ||||||
8828 | Step->Type->isOCLIntelSubgroupAVCType()) &&(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)) | ||||||
8829 | "Wrong type for initialization of OpenCL opaque type.")(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)); | ||||||
8830 | |||||||
8831 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||||
8832 | CK_ZeroToOCLOpaqueType, | ||||||
8833 | CurInit.get()->getValueKind()); | ||||||
8834 | break; | ||||||
8835 | } | ||||||
8836 | } | ||||||
8837 | } | ||||||
8838 | |||||||
8839 | // Check whether the initializer has a shorter lifetime than the initialized | ||||||
8840 | // entity, and if not, either lifetime-extend or warn as appropriate. | ||||||
8841 | if (auto *Init = CurInit.get()) | ||||||
8842 | S.checkInitializerLifetime(Entity, Init); | ||||||
8843 | |||||||
8844 | // Diagnose non-fatal problems with the completed initialization. | ||||||
8845 | if (Entity.getKind() == InitializedEntity::EK_Member && | ||||||
8846 | cast<FieldDecl>(Entity.getDecl())->isBitField()) | ||||||
8847 | S.CheckBitFieldInitialization(Kind.getLocation(), | ||||||
8848 | cast<FieldDecl>(Entity.getDecl()), | ||||||
8849 | CurInit.get()); | ||||||
8850 | |||||||
8851 | // Check for std::move on construction. | ||||||
8852 | if (const Expr *E = CurInit.get()) { | ||||||
8853 | CheckMoveOnConstruction(S, E, | ||||||
8854 | Entity.getKind() == InitializedEntity::EK_Result); | ||||||
8855 | } | ||||||
8856 | |||||||
8857 | return CurInit; | ||||||
8858 | } | ||||||
8859 | |||||||
8860 | /// Somewhere within T there is an uninitialized reference subobject. | ||||||
8861 | /// Dig it out and diagnose it. | ||||||
8862 | static bool DiagnoseUninitializedReference(Sema &S, SourceLocation Loc, | ||||||
8863 | QualType T) { | ||||||
8864 | if (T->isReferenceType()) { | ||||||
8865 | S.Diag(Loc, diag::err_reference_without_init) | ||||||
8866 | << T.getNonReferenceType(); | ||||||
8867 | return true; | ||||||
8868 | } | ||||||
8869 | |||||||
8870 | CXXRecordDecl *RD = T->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); | ||||||
8871 | if (!RD || !RD->hasUninitializedReferenceMember()) | ||||||
8872 | return false; | ||||||
8873 | |||||||
8874 | for (const auto *FI : RD->fields()) { | ||||||
8875 | if (FI->isUnnamedBitfield()) | ||||||
8876 | continue; | ||||||
8877 | |||||||
8878 | if (DiagnoseUninitializedReference(S, FI->getLocation(), FI->getType())) { | ||||||
8879 | S.Diag(Loc, diag::note_value_initialization_here) << RD; | ||||||
8880 | return true; | ||||||
8881 | } | ||||||
8882 | } | ||||||
8883 | |||||||
8884 | for (const auto &BI : RD->bases()) { | ||||||
8885 | if (DiagnoseUninitializedReference(S, BI.getBeginLoc(), BI.getType())) { | ||||||
8886 | S.Diag(Loc, diag::note_value_initialization_here) << RD; | ||||||
8887 | return true; | ||||||
8888 | } | ||||||
8889 | } | ||||||
8890 | |||||||
8891 | return false; | ||||||
8892 | } | ||||||
8893 | |||||||
8894 | |||||||
8895 | //===----------------------------------------------------------------------===// | ||||||
8896 | // Diagnose initialization failures | ||||||
8897 | //===----------------------------------------------------------------------===// | ||||||
8898 | |||||||
8899 | /// Emit notes associated with an initialization that failed due to a | ||||||
8900 | /// "simple" conversion failure. | ||||||
8901 | static void emitBadConversionNotes(Sema &S, const InitializedEntity &entity, | ||||||
8902 | Expr *op) { | ||||||
8903 | QualType destType = entity.getType(); | ||||||
8904 | if (destType.getNonReferenceType()->isObjCObjectPointerType() && | ||||||
8905 | op->getType()->isObjCObjectPointerType()) { | ||||||
8906 | |||||||
8907 | // Emit a possible note about the conversion failing because the | ||||||
8908 | // operand is a message send with a related result type. | ||||||
8909 | S.EmitRelatedResultTypeNote(op); | ||||||
8910 | |||||||
8911 | // Emit a possible note about a return failing because we're | ||||||
8912 | // expecting a related result type. | ||||||
8913 | if (entity.getKind() == InitializedEntity::EK_Result) | ||||||
8914 | S.EmitRelatedResultTypeNoteForReturn(destType); | ||||||
8915 | } | ||||||
8916 | QualType fromType = op->getType(); | ||||||
8917 | auto *fromDecl = fromType.getTypePtr()->getPointeeCXXRecordDecl(); | ||||||
8918 | auto *destDecl = destType.getTypePtr()->getPointeeCXXRecordDecl(); | ||||||
8919 | if (fromDecl && destDecl && fromDecl->getDeclKind() == Decl::CXXRecord && | ||||||
8920 | destDecl->getDeclKind() == Decl::CXXRecord && | ||||||
8921 | !fromDecl->isInvalidDecl() && !destDecl->isInvalidDecl() && | ||||||
8922 | !fromDecl->hasDefinition()) | ||||||
8923 | S.Diag(fromDecl->getLocation(), diag::note_forward_class_conversion) | ||||||
8924 | << S.getASTContext().getTagDeclType(fromDecl) | ||||||
8925 | << S.getASTContext().getTagDeclType(destDecl); | ||||||
8926 | } | ||||||
8927 | |||||||
8928 | static void diagnoseListInit(Sema &S, const InitializedEntity &Entity, | ||||||
8929 | InitListExpr *InitList) { | ||||||
8930 | QualType DestType = Entity.getType(); | ||||||
8931 | |||||||
8932 | QualType E; | ||||||
8933 | if (S.getLangOpts().CPlusPlus11 && S.isStdInitializerList(DestType, &E)) { | ||||||
8934 | QualType ArrayType = S.Context.getConstantArrayType( | ||||||
8935 | E.withConst(), | ||||||
8936 | llvm::APInt(S.Context.getTypeSize(S.Context.getSizeType()), | ||||||
8937 | InitList->getNumInits()), | ||||||
8938 | nullptr, clang::ArrayType::Normal, 0); | ||||||
8939 | InitializedEntity HiddenArray = | ||||||
8940 | InitializedEntity::InitializeTemporary(ArrayType); | ||||||
8941 | return diagnoseListInit(S, HiddenArray, InitList); | ||||||
8942 | } | ||||||
8943 | |||||||
8944 | if (DestType->isReferenceType()) { | ||||||
8945 | // A list-initialization failure for a reference means that we tried to | ||||||
8946 | // create a temporary of the inner type (per [dcl.init.list]p3.6) and the | ||||||
8947 | // inner initialization failed. | ||||||
8948 | QualType T = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||||
8949 | diagnoseListInit(S, InitializedEntity::InitializeTemporary(T), InitList); | ||||||
8950 | SourceLocation Loc = InitList->getBeginLoc(); | ||||||
8951 | if (auto *D = Entity.getDecl()) | ||||||
8952 | Loc = D->getLocation(); | ||||||
8953 | S.Diag(Loc, diag::note_in_reference_temporary_list_initializer) << T; | ||||||
8954 | return; | ||||||
8955 | } | ||||||
8956 | |||||||
8957 | InitListChecker DiagnoseInitList(S, Entity, InitList, DestType, | ||||||
8958 | /*VerifyOnly=*/false, | ||||||
8959 | /*TreatUnavailableAsInvalid=*/false); | ||||||
8960 | assert(DiagnoseInitList.HadError() &&(static_cast <bool> (DiagnoseInitList.HadError() && "Inconsistent init list check result.") ? void (0) : __assert_fail ("DiagnoseInitList.HadError() && \"Inconsistent init list check result.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8961, __extension__ __PRETTY_FUNCTION__)) | ||||||
8961 | "Inconsistent init list check result.")(static_cast <bool> (DiagnoseInitList.HadError() && "Inconsistent init list check result.") ? void (0) : __assert_fail ("DiagnoseInitList.HadError() && \"Inconsistent init list check result.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8961, __extension__ __PRETTY_FUNCTION__)); | ||||||
8962 | } | ||||||
8963 | |||||||
8964 | bool InitializationSequence::Diagnose(Sema &S, | ||||||
8965 | const InitializedEntity &Entity, | ||||||
8966 | const InitializationKind &Kind, | ||||||
8967 | ArrayRef<Expr *> Args) { | ||||||
8968 | if (!Failed()) | ||||||
8969 | return false; | ||||||
8970 | |||||||
8971 | // When we want to diagnose only one element of a braced-init-list, | ||||||
8972 | // we need to factor it out. | ||||||
8973 | Expr *OnlyArg; | ||||||
8974 | if (Args.size() == 1) { | ||||||
8975 | auto *List = dyn_cast<InitListExpr>(Args[0]); | ||||||
8976 | if (List && List->getNumInits() == 1) | ||||||
8977 | OnlyArg = List->getInit(0); | ||||||
8978 | else | ||||||
8979 | OnlyArg = Args[0]; | ||||||
8980 | } | ||||||
8981 | else | ||||||
8982 | OnlyArg = nullptr; | ||||||
8983 | |||||||
8984 | QualType DestType = Entity.getType(); | ||||||
8985 | switch (Failure) { | ||||||
8986 | case FK_TooManyInitsForReference: | ||||||
8987 | // FIXME: Customize for the initialized entity? | ||||||
8988 | if (Args.empty()) { | ||||||
8989 | // Dig out the reference subobject which is uninitialized and diagnose it. | ||||||
8990 | // If this is value-initialization, this could be nested some way within | ||||||
8991 | // the target type. | ||||||
8992 | assert(Kind.getKind() == InitializationKind::IK_Value ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Value || DestType->isReferenceType()) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Value || DestType->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8993, __extension__ __PRETTY_FUNCTION__)) | ||||||
8993 | DestType->isReferenceType())(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Value || DestType->isReferenceType()) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Value || DestType->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8993, __extension__ __PRETTY_FUNCTION__)); | ||||||
8994 | bool Diagnosed = | ||||||
8995 | DiagnoseUninitializedReference(S, Kind.getLocation(), DestType); | ||||||
8996 | assert(Diagnosed && "couldn't find uninitialized reference to diagnose")(static_cast <bool> (Diagnosed && "couldn't find uninitialized reference to diagnose" ) ? void (0) : __assert_fail ("Diagnosed && \"couldn't find uninitialized reference to diagnose\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8996, __extension__ __PRETTY_FUNCTION__)); | ||||||
8997 | (void)Diagnosed; | ||||||
8998 | } else // FIXME: diagnostic below could be better! | ||||||
8999 | S.Diag(Kind.getLocation(), diag::err_reference_has_multiple_inits) | ||||||
9000 | << SourceRange(Args.front()->getBeginLoc(), Args.back()->getEndLoc()); | ||||||
9001 | break; | ||||||
9002 | case FK_ParenthesizedListInitForReference: | ||||||
9003 | S.Diag(Kind.getLocation(), diag::err_list_init_in_parens) | ||||||
9004 | << 1 << Entity.getType() << Args[0]->getSourceRange(); | ||||||
9005 | break; | ||||||
9006 | |||||||
9007 | case FK_ArrayNeedsInitList: | ||||||
9008 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 0; | ||||||
9009 | break; | ||||||
9010 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||||
9011 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 1; | ||||||
9012 | break; | ||||||
9013 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||||
9014 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 2; | ||||||
9015 | break; | ||||||
9016 | case FK_NarrowStringIntoWideCharArray: | ||||||
9017 | S.Diag(Kind.getLocation(), diag::err_array_init_narrow_string_into_wchar); | ||||||
9018 | break; | ||||||
9019 | case FK_WideStringIntoCharArray: | ||||||
9020 | S.Diag(Kind.getLocation(), diag::err_array_init_wide_string_into_char); | ||||||
9021 | break; | ||||||
9022 | case FK_IncompatWideStringIntoWideChar: | ||||||
9023 | S.Diag(Kind.getLocation(), | ||||||
9024 | diag::err_array_init_incompat_wide_string_into_wchar); | ||||||
9025 | break; | ||||||
9026 | case FK_PlainStringIntoUTF8Char: | ||||||
9027 | S.Diag(Kind.getLocation(), | ||||||
9028 | diag::err_array_init_plain_string_into_char8_t); | ||||||
9029 | S.Diag(Args.front()->getBeginLoc(), | ||||||
9030 | diag::note_array_init_plain_string_into_char8_t) | ||||||
9031 | << FixItHint::CreateInsertion(Args.front()->getBeginLoc(), "u8"); | ||||||
9032 | break; | ||||||
9033 | case FK_UTF8StringIntoPlainChar: | ||||||
9034 | S.Diag(Kind.getLocation(), | ||||||
9035 | diag::err_array_init_utf8_string_into_char) | ||||||
9036 | << S.getLangOpts().CPlusPlus20; | ||||||
9037 | break; | ||||||
9038 | case FK_ArrayTypeMismatch: | ||||||
9039 | case FK_NonConstantArrayInit: | ||||||
9040 | S.Diag(Kind.getLocation(), | ||||||
9041 | (Failure == FK_ArrayTypeMismatch | ||||||
9042 | ? diag::err_array_init_different_type | ||||||
9043 | : diag::err_array_init_non_constant_array)) | ||||||
9044 | << DestType.getNonReferenceType() | ||||||
9045 | << OnlyArg->getType() | ||||||
9046 | << Args[0]->getSourceRange(); | ||||||
9047 | break; | ||||||
9048 | |||||||
9049 | case FK_VariableLengthArrayHasInitializer: | ||||||
9050 | S.Diag(Kind.getLocation(), diag::err_variable_object_no_init) | ||||||
9051 | << Args[0]->getSourceRange(); | ||||||
9052 | break; | ||||||
9053 | |||||||
9054 | case FK_AddressOfOverloadFailed: { | ||||||
9055 | DeclAccessPair Found; | ||||||
9056 | S.ResolveAddressOfOverloadedFunction(OnlyArg, | ||||||
9057 | DestType.getNonReferenceType(), | ||||||
9058 | true, | ||||||
9059 | Found); | ||||||
9060 | break; | ||||||
9061 | } | ||||||
9062 | |||||||
9063 | case FK_AddressOfUnaddressableFunction: { | ||||||
9064 | auto *FD = cast<FunctionDecl>(cast<DeclRefExpr>(OnlyArg)->getDecl()); | ||||||
9065 | S.checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | ||||||
9066 | OnlyArg->getBeginLoc()); | ||||||
9067 | break; | ||||||
9068 | } | ||||||
9069 | |||||||
9070 | case FK_ReferenceInitOverloadFailed: | ||||||
9071 | case FK_UserConversionOverloadFailed: | ||||||
9072 | switch (FailedOverloadResult) { | ||||||
9073 | case OR_Ambiguous: | ||||||
9074 | |||||||
9075 | FailedCandidateSet.NoteCandidates( | ||||||
9076 | PartialDiagnosticAt( | ||||||
9077 | Kind.getLocation(), | ||||||
9078 | Failure == FK_UserConversionOverloadFailed | ||||||
9079 | ? (S.PDiag(diag::err_typecheck_ambiguous_condition) | ||||||
9080 | << OnlyArg->getType() << DestType | ||||||
9081 | << Args[0]->getSourceRange()) | ||||||
9082 | : (S.PDiag(diag::err_ref_init_ambiguous) | ||||||
9083 | << DestType << OnlyArg->getType() | ||||||
9084 | << Args[0]->getSourceRange())), | ||||||
9085 | S, OCD_AmbiguousCandidates, Args); | ||||||
9086 | break; | ||||||
9087 | |||||||
9088 | case OR_No_Viable_Function: { | ||||||
9089 | auto Cands = FailedCandidateSet.CompleteCandidates(S, OCD_AllCandidates, Args); | ||||||
9090 | if (!S.RequireCompleteType(Kind.getLocation(), | ||||||
9091 | DestType.getNonReferenceType(), | ||||||
9092 | diag::err_typecheck_nonviable_condition_incomplete, | ||||||
9093 | OnlyArg->getType(), Args[0]->getSourceRange())) | ||||||
9094 | S.Diag(Kind.getLocation(), diag::err_typecheck_nonviable_condition) | ||||||
9095 | << (Entity.getKind() == InitializedEntity::EK_Result) | ||||||
9096 | << OnlyArg->getType() << Args[0]->getSourceRange() | ||||||
9097 | << DestType.getNonReferenceType(); | ||||||
9098 | |||||||
9099 | FailedCandidateSet.NoteCandidates(S, Args, Cands); | ||||||
9100 | break; | ||||||
9101 | } | ||||||
9102 | case OR_Deleted: { | ||||||
9103 | S.Diag(Kind.getLocation(), diag::err_typecheck_deleted_function) | ||||||
9104 | << OnlyArg->getType() << DestType.getNonReferenceType() | ||||||
9105 | << Args[0]->getSourceRange(); | ||||||
9106 | OverloadCandidateSet::iterator Best; | ||||||
9107 | OverloadingResult Ovl | ||||||
9108 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||||
9109 | if (Ovl == OR_Deleted) { | ||||||
9110 | S.NoteDeletedFunction(Best->Function); | ||||||
9111 | } else { | ||||||
9112 | llvm_unreachable("Inconsistent overload resolution?")::llvm::llvm_unreachable_internal("Inconsistent overload resolution?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9112); | ||||||
9113 | } | ||||||
9114 | break; | ||||||
9115 | } | ||||||
9116 | |||||||
9117 | case OR_Success: | ||||||
9118 | llvm_unreachable("Conversion did not fail!")::llvm::llvm_unreachable_internal("Conversion did not fail!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9118); | ||||||
9119 | } | ||||||
9120 | break; | ||||||
9121 | |||||||
9122 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||||
9123 | if (isa<InitListExpr>(Args[0])) { | ||||||
9124 | S.Diag(Kind.getLocation(), | ||||||
9125 | diag::err_lvalue_reference_bind_to_initlist) | ||||||
9126 | << DestType.getNonReferenceType().isVolatileQualified() | ||||||
9127 | << DestType.getNonReferenceType() | ||||||
9128 | << Args[0]->getSourceRange(); | ||||||
9129 | break; | ||||||
9130 | } | ||||||
9131 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
9132 | |||||||
9133 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||||
9134 | S.Diag(Kind.getLocation(), | ||||||
9135 | Failure == FK_NonConstLValueReferenceBindingToTemporary | ||||||
9136 | ? diag::err_lvalue_reference_bind_to_temporary | ||||||
9137 | : diag::err_lvalue_reference_bind_to_unrelated) | ||||||
9138 | << DestType.getNonReferenceType().isVolatileQualified() | ||||||
9139 | << DestType.getNonReferenceType() | ||||||
9140 | << OnlyArg->getType() | ||||||
9141 | << Args[0]->getSourceRange(); | ||||||
9142 | break; | ||||||
9143 | |||||||
9144 | case FK_NonConstLValueReferenceBindingToBitfield: { | ||||||
9145 | // We don't necessarily have an unambiguous source bit-field. | ||||||
9146 | FieldDecl *BitField = Args[0]->getSourceBitField(); | ||||||
9147 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_bitfield) | ||||||
9148 | << DestType.isVolatileQualified() | ||||||
9149 | << (BitField ? BitField->getDeclName() : DeclarationName()) | ||||||
9150 | << (BitField != nullptr) | ||||||
9151 | << Args[0]->getSourceRange(); | ||||||
9152 | if (BitField) | ||||||
9153 | S.Diag(BitField->getLocation(), diag::note_bitfield_decl); | ||||||
9154 | break; | ||||||
9155 | } | ||||||
9156 | |||||||
9157 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||||
9158 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_vector_element) | ||||||
9159 | << DestType.isVolatileQualified() | ||||||
9160 | << Args[0]->getSourceRange(); | ||||||
9161 | break; | ||||||
9162 | |||||||
9163 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||||
9164 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_matrix_element) | ||||||
9165 | << DestType.isVolatileQualified() << Args[0]->getSourceRange(); | ||||||
9166 | break; | ||||||
9167 | |||||||
9168 | case FK_RValueReferenceBindingToLValue: | ||||||
9169 | S.Diag(Kind.getLocation(), diag::err_lvalue_to_rvalue_ref) | ||||||
9170 | << DestType.getNonReferenceType() << OnlyArg->getType() | ||||||
9171 | << Args[0]->getSourceRange(); | ||||||
9172 | break; | ||||||
9173 | |||||||
9174 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||||
9175 | S.Diag(Kind.getLocation(), diag::err_reference_bind_temporary_addrspace) | ||||||
9176 | << DestType << Args[0]->getSourceRange(); | ||||||
9177 | break; | ||||||
9178 | |||||||
9179 | case FK_ReferenceInitDropsQualifiers: { | ||||||
9180 | QualType SourceType = OnlyArg->getType(); | ||||||
9181 | QualType NonRefType = DestType.getNonReferenceType(); | ||||||
9182 | Qualifiers DroppedQualifiers = | ||||||
9183 | SourceType.getQualifiers() - NonRefType.getQualifiers(); | ||||||
9184 | |||||||
9185 | if (!NonRefType.getQualifiers().isAddressSpaceSupersetOf( | ||||||
9186 | SourceType.getQualifiers())) | ||||||
9187 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||||
9188 | << NonRefType << SourceType << 1 /*addr space*/ | ||||||
9189 | << Args[0]->getSourceRange(); | ||||||
9190 | else if (DroppedQualifiers.hasQualifiers()) | ||||||
9191 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||||
9192 | << NonRefType << SourceType << 0 /*cv quals*/ | ||||||
9193 | << Qualifiers::fromCVRMask(DroppedQualifiers.getCVRQualifiers()) | ||||||
9194 | << DroppedQualifiers.getCVRQualifiers() << Args[0]->getSourceRange(); | ||||||
9195 | else | ||||||
9196 | // FIXME: Consider decomposing the type and explaining which qualifiers | ||||||
9197 | // were dropped where, or on which level a 'const' is missing, etc. | ||||||
9198 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||||
9199 | << NonRefType << SourceType << 2 /*incompatible quals*/ | ||||||
9200 | << Args[0]->getSourceRange(); | ||||||
9201 | break; | ||||||
9202 | } | ||||||
9203 | |||||||
9204 | case FK_ReferenceInitFailed: | ||||||
9205 | S.Diag(Kind.getLocation(), diag::err_reference_bind_failed) | ||||||
9206 | << DestType.getNonReferenceType() | ||||||
9207 | << DestType.getNonReferenceType()->isIncompleteType() | ||||||
9208 | << OnlyArg->isLValue() | ||||||
9209 | << OnlyArg->getType() | ||||||
9210 | << Args[0]->getSourceRange(); | ||||||
9211 | emitBadConversionNotes(S, Entity, Args[0]); | ||||||
9212 | break; | ||||||
9213 | |||||||
9214 | case FK_ConversionFailed: { | ||||||
9215 | QualType FromType = OnlyArg->getType(); | ||||||
9216 | PartialDiagnostic PDiag = S.PDiag(diag::err_init_conversion_failed) | ||||||
9217 | << (int)Entity.getKind() | ||||||
9218 | << DestType | ||||||
9219 | << OnlyArg->isLValue() | ||||||
9220 | << FromType | ||||||
9221 | << Args[0]->getSourceRange(); | ||||||
9222 | S.HandleFunctionTypeMismatch(PDiag, FromType, DestType); | ||||||
9223 | S.Diag(Kind.getLocation(), PDiag); | ||||||
9224 | emitBadConversionNotes(S, Entity, Args[0]); | ||||||
9225 | break; | ||||||
9226 | } | ||||||
9227 | |||||||
9228 | case FK_ConversionFromPropertyFailed: | ||||||
9229 | // No-op. This error has already been reported. | ||||||
9230 | break; | ||||||
9231 | |||||||
9232 | case FK_TooManyInitsForScalar: { | ||||||
9233 | SourceRange R; | ||||||
9234 | |||||||
9235 | auto *InitList = dyn_cast<InitListExpr>(Args[0]); | ||||||
9236 | if (InitList && InitList->getNumInits() >= 1) { | ||||||
9237 | R = SourceRange(InitList->getInit(0)->getEndLoc(), InitList->getEndLoc()); | ||||||
9238 | } else { | ||||||
9239 | assert(Args.size() > 1 && "Expected multiple initializers!")(static_cast <bool> (Args.size() > 1 && "Expected multiple initializers!" ) ? void (0) : __assert_fail ("Args.size() > 1 && \"Expected multiple initializers!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9239, __extension__ __PRETTY_FUNCTION__)); | ||||||
9240 | R = SourceRange(Args.front()->getEndLoc(), Args.back()->getEndLoc()); | ||||||
9241 | } | ||||||
9242 | |||||||
9243 | R.setBegin(S.getLocForEndOfToken(R.getBegin())); | ||||||
9244 | if (Kind.isCStyleOrFunctionalCast()) | ||||||
9245 | S.Diag(Kind.getLocation(), diag::err_builtin_func_cast_more_than_one_arg) | ||||||
9246 | << R; | ||||||
9247 | else | ||||||
9248 | S.Diag(Kind.getLocation(), diag::err_excess_initializers) | ||||||
9249 | << /*scalar=*/2 << R; | ||||||
9250 | break; | ||||||
9251 | } | ||||||
9252 | |||||||
9253 | case FK_ParenthesizedListInitForScalar: | ||||||
9254 | S.Diag(Kind.getLocation(), diag::err_list_init_in_parens) | ||||||
9255 | << 0 << Entity.getType() << Args[0]->getSourceRange(); | ||||||
9256 | break; | ||||||
9257 | |||||||
9258 | case FK_ReferenceBindingToInitList: | ||||||
9259 | S.Diag(Kind.getLocation(), diag::err_reference_bind_init_list) | ||||||
9260 | << DestType.getNonReferenceType() << Args[0]->getSourceRange(); | ||||||
9261 | break; | ||||||
9262 | |||||||
9263 | case FK_InitListBadDestinationType: | ||||||
9264 | S.Diag(Kind.getLocation(), diag::err_init_list_bad_dest_type) | ||||||
9265 | << (DestType->isRecordType()) << DestType << Args[0]->getSourceRange(); | ||||||
9266 | break; | ||||||
9267 | |||||||
9268 | case FK_ListConstructorOverloadFailed: | ||||||
9269 | case FK_ConstructorOverloadFailed: { | ||||||
9270 | SourceRange ArgsRange; | ||||||
9271 | if (Args.size()) | ||||||
9272 | ArgsRange = | ||||||
9273 | SourceRange(Args.front()->getBeginLoc(), Args.back()->getEndLoc()); | ||||||
9274 | |||||||
9275 | if (Failure == FK_ListConstructorOverloadFailed) { | ||||||
9276 | assert(Args.size() == 1 &&(static_cast <bool> (Args.size() == 1 && "List construction from other than 1 argument." ) ? void (0) : __assert_fail ("Args.size() == 1 && \"List construction from other than 1 argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9277, __extension__ __PRETTY_FUNCTION__)) | ||||||
9277 | "List construction from other than 1 argument.")(static_cast <bool> (Args.size() == 1 && "List construction from other than 1 argument." ) ? void (0) : __assert_fail ("Args.size() == 1 && \"List construction from other than 1 argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9277, __extension__ __PRETTY_FUNCTION__)); | ||||||
9278 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||||
9279 | Args = MultiExprArg(InitList->getInits(), InitList->getNumInits()); | ||||||
9280 | } | ||||||
9281 | |||||||
9282 | // FIXME: Using "DestType" for the entity we're printing is probably | ||||||
9283 | // bad. | ||||||
9284 | switch (FailedOverloadResult) { | ||||||
9285 | case OR_Ambiguous: | ||||||
9286 | FailedCandidateSet.NoteCandidates( | ||||||
9287 | PartialDiagnosticAt(Kind.getLocation(), | ||||||
9288 | S.PDiag(diag::err_ovl_ambiguous_init) | ||||||
9289 | << DestType << ArgsRange), | ||||||
9290 | S, OCD_AmbiguousCandidates, Args); | ||||||
9291 | break; | ||||||
9292 | |||||||
9293 | case OR_No_Viable_Function: | ||||||
9294 | if (Kind.getKind() == InitializationKind::IK_Default && | ||||||
9295 | (Entity.getKind() == InitializedEntity::EK_Base || | ||||||
9296 | Entity.getKind() == InitializedEntity::EK_Member) && | ||||||
9297 | isa<CXXConstructorDecl>(S.CurContext)) { | ||||||
9298 | // This is implicit default initialization of a member or | ||||||
9299 | // base within a constructor. If no viable function was | ||||||
9300 | // found, notify the user that they need to explicitly | ||||||
9301 | // initialize this base/member. | ||||||
9302 | CXXConstructorDecl *Constructor | ||||||
9303 | = cast<CXXConstructorDecl>(S.CurContext); | ||||||
9304 | const CXXRecordDecl *InheritedFrom = nullptr; | ||||||
9305 | if (auto Inherited = Constructor->getInheritedConstructor()) | ||||||
9306 | InheritedFrom = Inherited.getShadowDecl()->getNominatedBaseClass(); | ||||||
9307 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||||
9308 | S.Diag(Kind.getLocation(), diag::err_missing_default_ctor) | ||||||
9309 | << (InheritedFrom ? 2 : Constructor->isImplicit() ? 1 : 0) | ||||||
9310 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||||
9311 | << /*base=*/0 | ||||||
9312 | << Entity.getType() | ||||||
9313 | << InheritedFrom; | ||||||
9314 | |||||||
9315 | RecordDecl *BaseDecl | ||||||
9316 | = Entity.getBaseSpecifier()->getType()->castAs<RecordType>() | ||||||
9317 | ->getDecl(); | ||||||
9318 | S.Diag(BaseDecl->getLocation(), diag::note_previous_decl) | ||||||
9319 | << S.Context.getTagDeclType(BaseDecl); | ||||||
9320 | } else { | ||||||
9321 | S.Diag(Kind.getLocation(), diag::err_missing_default_ctor) | ||||||
9322 | << (InheritedFrom ? 2 : Constructor->isImplicit() ? 1 : 0) | ||||||
9323 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||||
9324 | << /*member=*/1 | ||||||
9325 | << Entity.getName() | ||||||
9326 | << InheritedFrom; | ||||||
9327 | S.Diag(Entity.getDecl()->getLocation(), | ||||||
9328 | diag::note_member_declared_at); | ||||||
9329 | |||||||
9330 | if (const RecordType *Record | ||||||
9331 | = Entity.getType()->getAs<RecordType>()) | ||||||
9332 | S.Diag(Record->getDecl()->getLocation(), | ||||||
9333 | diag::note_previous_decl) | ||||||
9334 | << S.Context.getTagDeclType(Record->getDecl()); | ||||||
9335 | } | ||||||
9336 | break; | ||||||
9337 | } | ||||||
9338 | |||||||
9339 | FailedCandidateSet.NoteCandidates( | ||||||
9340 | PartialDiagnosticAt( | ||||||
9341 | Kind.getLocation(), | ||||||
9342 | S.PDiag(diag::err_ovl_no_viable_function_in_init) | ||||||
9343 | << DestType << ArgsRange), | ||||||
9344 | S, OCD_AllCandidates, Args); | ||||||
9345 | break; | ||||||
9346 | |||||||
9347 | case OR_Deleted: { | ||||||
9348 | OverloadCandidateSet::iterator Best; | ||||||
9349 | OverloadingResult Ovl | ||||||
9350 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||||
9351 | if (Ovl != OR_Deleted) { | ||||||
9352 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_init) | ||||||
9353 | << DestType << ArgsRange; | ||||||
9354 | llvm_unreachable("Inconsistent overload resolution?")::llvm::llvm_unreachable_internal("Inconsistent overload resolution?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9354); | ||||||
9355 | break; | ||||||
9356 | } | ||||||
9357 | |||||||
9358 | // If this is a defaulted or implicitly-declared function, then | ||||||
9359 | // it was implicitly deleted. Make it clear that the deletion was | ||||||
9360 | // implicit. | ||||||
9361 | if (S.isImplicitlyDeleted(Best->Function)) | ||||||
9362 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_special_init) | ||||||
9363 | << S.getSpecialMember(cast<CXXMethodDecl>(Best->Function)) | ||||||
9364 | << DestType << ArgsRange; | ||||||
9365 | else | ||||||
9366 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_init) | ||||||
9367 | << DestType << ArgsRange; | ||||||
9368 | |||||||
9369 | S.NoteDeletedFunction(Best->Function); | ||||||
9370 | break; | ||||||
9371 | } | ||||||
9372 | |||||||
9373 | case OR_Success: | ||||||
9374 | llvm_unreachable("Conversion did not fail!")::llvm::llvm_unreachable_internal("Conversion did not fail!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9374); | ||||||
9375 | } | ||||||
9376 | } | ||||||
9377 | break; | ||||||
9378 | |||||||
9379 | case FK_DefaultInitOfConst: | ||||||
9380 | if (Entity.getKind() == InitializedEntity::EK_Member && | ||||||
9381 | isa<CXXConstructorDecl>(S.CurContext)) { | ||||||
9382 | // This is implicit default-initialization of a const member in | ||||||
9383 | // a constructor. Complain that it needs to be explicitly | ||||||
9384 | // initialized. | ||||||
9385 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(S.CurContext); | ||||||
9386 | S.Diag(Kind.getLocation(), diag::err_uninitialized_member_in_ctor) | ||||||
9387 | << (Constructor->getInheritedConstructor() ? 2 : | ||||||
9388 | Constructor->isImplicit() ? 1 : 0) | ||||||
9389 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||||
9390 | << /*const=*/1 | ||||||
9391 | << Entity.getName(); | ||||||
9392 | S.Diag(Entity.getDecl()->getLocation(), diag::note_previous_decl) | ||||||
9393 | << Entity.getName(); | ||||||
9394 | } else { | ||||||
9395 | S.Diag(Kind.getLocation(), diag::err_default_init_const) | ||||||
9396 | << DestType << (bool)DestType->getAs<RecordType>(); | ||||||
9397 | } | ||||||
9398 | break; | ||||||
9399 | |||||||
9400 | case FK_Incomplete: | ||||||
9401 | S.RequireCompleteType(Kind.getLocation(), FailedIncompleteType, | ||||||
9402 | diag::err_init_incomplete_type); | ||||||
9403 | break; | ||||||
9404 | |||||||
9405 | case FK_ListInitializationFailed: { | ||||||
9406 | // Run the init list checker again to emit diagnostics. | ||||||
9407 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||||
9408 | diagnoseListInit(S, Entity, InitList); | ||||||
9409 | break; | ||||||
9410 | } | ||||||
9411 | |||||||
9412 | case FK_PlaceholderType: { | ||||||
9413 | // FIXME: Already diagnosed! | ||||||
9414 | break; | ||||||
9415 | } | ||||||
9416 | |||||||
9417 | case FK_ExplicitConstructor: { | ||||||
9418 | S.Diag(Kind.getLocation(), diag::err_selected_explicit_constructor) | ||||||
9419 | << Args[0]->getSourceRange(); | ||||||
9420 | OverloadCandidateSet::iterator Best; | ||||||
9421 | OverloadingResult Ovl | ||||||
9422 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||||
9423 | (void)Ovl; | ||||||
9424 | assert(Ovl == OR_Success && "Inconsistent overload resolution")(static_cast <bool> (Ovl == OR_Success && "Inconsistent overload resolution" ) ? void (0) : __assert_fail ("Ovl == OR_Success && \"Inconsistent overload resolution\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9424, __extension__ __PRETTY_FUNCTION__)); | ||||||
9425 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||||
9426 | S.Diag(CtorDecl->getLocation(), | ||||||
9427 | diag::note_explicit_ctor_deduction_guide_here) << false; | ||||||
9428 | break; | ||||||
9429 | } | ||||||
9430 | } | ||||||
9431 | |||||||
9432 | PrintInitLocationNote(S, Entity); | ||||||
9433 | return true; | ||||||
9434 | } | ||||||
9435 | |||||||
9436 | void InitializationSequence::dump(raw_ostream &OS) const { | ||||||
9437 | switch (SequenceKind) { | ||||||
9438 | case FailedSequence: { | ||||||
9439 | OS << "Failed sequence: "; | ||||||
9440 | switch (Failure) { | ||||||
9441 | case FK_TooManyInitsForReference: | ||||||
9442 | OS << "too many initializers for reference"; | ||||||
9443 | break; | ||||||
9444 | |||||||
9445 | case FK_ParenthesizedListInitForReference: | ||||||
9446 | OS << "parenthesized list init for reference"; | ||||||
9447 | break; | ||||||
9448 | |||||||
9449 | case FK_ArrayNeedsInitList: | ||||||
9450 | OS << "array requires initializer list"; | ||||||
9451 | break; | ||||||
9452 | |||||||
9453 | case FK_AddressOfUnaddressableFunction: | ||||||
9454 | OS << "address of unaddressable function was taken"; | ||||||
9455 | break; | ||||||
9456 | |||||||
9457 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||||
9458 | OS << "array requires initializer list or string literal"; | ||||||
9459 | break; | ||||||
9460 | |||||||
9461 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||||
9462 | OS << "array requires initializer list or wide string literal"; | ||||||
9463 | break; | ||||||
9464 | |||||||
9465 | case FK_NarrowStringIntoWideCharArray: | ||||||
9466 | OS << "narrow string into wide char array"; | ||||||
9467 | break; | ||||||
9468 | |||||||
9469 | case FK_WideStringIntoCharArray: | ||||||
9470 | OS << "wide string into char array"; | ||||||
9471 | break; | ||||||
9472 | |||||||
9473 | case FK_IncompatWideStringIntoWideChar: | ||||||
9474 | OS << "incompatible wide string into wide char array"; | ||||||
9475 | break; | ||||||
9476 | |||||||
9477 | case FK_PlainStringIntoUTF8Char: | ||||||
9478 | OS << "plain string literal into char8_t array"; | ||||||
9479 | break; | ||||||
9480 | |||||||
9481 | case FK_UTF8StringIntoPlainChar: | ||||||
9482 | OS << "u8 string literal into char array"; | ||||||
9483 | break; | ||||||
9484 | |||||||
9485 | case FK_ArrayTypeMismatch: | ||||||
9486 | OS << "array type mismatch"; | ||||||
9487 | break; | ||||||
9488 | |||||||
9489 | case FK_NonConstantArrayInit: | ||||||
9490 | OS << "non-constant array initializer"; | ||||||
9491 | break; | ||||||
9492 | |||||||
9493 | case FK_AddressOfOverloadFailed: | ||||||
9494 | OS << "address of overloaded function failed"; | ||||||
9495 | break; | ||||||
9496 | |||||||
9497 | case FK_ReferenceInitOverloadFailed: | ||||||
9498 | OS << "overload resolution for reference initialization failed"; | ||||||
9499 | break; | ||||||
9500 | |||||||
9501 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||||
9502 | OS << "non-const lvalue reference bound to temporary"; | ||||||
9503 | break; | ||||||
9504 | |||||||
9505 | case FK_NonConstLValueReferenceBindingToBitfield: | ||||||
9506 | OS << "non-const lvalue reference bound to bit-field"; | ||||||
9507 | break; | ||||||
9508 | |||||||
9509 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||||
9510 | OS << "non-const lvalue reference bound to vector element"; | ||||||
9511 | break; | ||||||
9512 | |||||||
9513 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||||
9514 | OS << "non-const lvalue reference bound to matrix element"; | ||||||
9515 | break; | ||||||
9516 | |||||||
9517 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||||
9518 | OS << "non-const lvalue reference bound to unrelated type"; | ||||||
9519 | break; | ||||||
9520 | |||||||
9521 | case FK_RValueReferenceBindingToLValue: | ||||||
9522 | OS << "rvalue reference bound to an lvalue"; | ||||||
9523 | break; | ||||||
9524 | |||||||
9525 | case FK_ReferenceInitDropsQualifiers: | ||||||
9526 | OS << "reference initialization drops qualifiers"; | ||||||
9527 | break; | ||||||
9528 | |||||||
9529 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||||
9530 | OS << "reference with mismatching address space bound to temporary"; | ||||||
9531 | break; | ||||||
9532 | |||||||
9533 | case FK_ReferenceInitFailed: | ||||||
9534 | OS << "reference initialization failed"; | ||||||
9535 | break; | ||||||
9536 | |||||||
9537 | case FK_ConversionFailed: | ||||||
9538 | OS << "conversion failed"; | ||||||
9539 | break; | ||||||
9540 | |||||||
9541 | case FK_ConversionFromPropertyFailed: | ||||||
9542 | OS << "conversion from property failed"; | ||||||
9543 | break; | ||||||
9544 | |||||||
9545 | case FK_TooManyInitsForScalar: | ||||||
9546 | OS << "too many initializers for scalar"; | ||||||
9547 | break; | ||||||
9548 | |||||||
9549 | case FK_ParenthesizedListInitForScalar: | ||||||
9550 | OS << "parenthesized list init for reference"; | ||||||
9551 | break; | ||||||
9552 | |||||||
9553 | case FK_ReferenceBindingToInitList: | ||||||
9554 | OS << "referencing binding to initializer list"; | ||||||
9555 | break; | ||||||
9556 | |||||||
9557 | case FK_InitListBadDestinationType: | ||||||
9558 | OS << "initializer list for non-aggregate, non-scalar type"; | ||||||
9559 | break; | ||||||
9560 | |||||||
9561 | case FK_UserConversionOverloadFailed: | ||||||
9562 | OS << "overloading failed for user-defined conversion"; | ||||||
9563 | break; | ||||||
9564 | |||||||
9565 | case FK_ConstructorOverloadFailed: | ||||||
9566 | OS << "constructor overloading failed"; | ||||||
9567 | break; | ||||||
9568 | |||||||
9569 | case FK_DefaultInitOfConst: | ||||||
9570 | OS << "default initialization of a const variable"; | ||||||
9571 | break; | ||||||
9572 | |||||||
9573 | case FK_Incomplete: | ||||||
9574 | OS << "initialization of incomplete type"; | ||||||
9575 | break; | ||||||
9576 | |||||||
9577 | case FK_ListInitializationFailed: | ||||||
9578 | OS << "list initialization checker failure"; | ||||||
9579 | break; | ||||||
9580 | |||||||
9581 | case FK_VariableLengthArrayHasInitializer: | ||||||
9582 | OS << "variable length array has an initializer"; | ||||||
9583 | break; | ||||||
9584 | |||||||
9585 | case FK_PlaceholderType: | ||||||
9586 | OS << "initializer expression isn't contextually valid"; | ||||||
9587 | break; | ||||||
9588 | |||||||
9589 | case FK_ListConstructorOverloadFailed: | ||||||
9590 | OS << "list constructor overloading failed"; | ||||||
9591 | break; | ||||||
9592 | |||||||
9593 | case FK_ExplicitConstructor: | ||||||
9594 | OS << "list copy initialization chose explicit constructor"; | ||||||
9595 | break; | ||||||
9596 | } | ||||||
9597 | OS << '\n'; | ||||||
9598 | return; | ||||||
9599 | } | ||||||
9600 | |||||||
9601 | case DependentSequence: | ||||||
9602 | OS << "Dependent sequence\n"; | ||||||
9603 | return; | ||||||
9604 | |||||||
9605 | case NormalSequence: | ||||||
9606 | OS << "Normal sequence: "; | ||||||
9607 | break; | ||||||
9608 | } | ||||||
9609 | |||||||
9610 | for (step_iterator S = step_begin(), SEnd = step_end(); S != SEnd; ++S) { | ||||||
9611 | if (S != step_begin()) { | ||||||
9612 | OS << " -> "; | ||||||
9613 | } | ||||||
9614 | |||||||
9615 | switch (S->Kind) { | ||||||
9616 | case SK_ResolveAddressOfOverloadedFunction: | ||||||
9617 | OS << "resolve address of overloaded function"; | ||||||
9618 | break; | ||||||
9619 | |||||||
9620 | case SK_CastDerivedToBasePRValue: | ||||||
9621 | OS << "derived-to-base (prvalue)"; | ||||||
9622 | break; | ||||||
9623 | |||||||
9624 | case SK_CastDerivedToBaseXValue: | ||||||
9625 | OS << "derived-to-base (xvalue)"; | ||||||
9626 | break; | ||||||
9627 | |||||||
9628 | case SK_CastDerivedToBaseLValue: | ||||||
9629 | OS << "derived-to-base (lvalue)"; | ||||||
9630 | break; | ||||||
9631 | |||||||
9632 | case SK_BindReference: | ||||||
9633 | OS << "bind reference to lvalue"; | ||||||
9634 | break; | ||||||
9635 | |||||||
9636 | case SK_BindReferenceToTemporary: | ||||||
9637 | OS << "bind reference to a temporary"; | ||||||
9638 | break; | ||||||
9639 | |||||||
9640 | case SK_FinalCopy: | ||||||
9641 | OS << "final copy in class direct-initialization"; | ||||||
9642 | break; | ||||||
9643 | |||||||
9644 | case SK_ExtraneousCopyToTemporary: | ||||||
9645 | OS << "extraneous C++03 copy to temporary"; | ||||||
9646 | break; | ||||||
9647 | |||||||
9648 | case SK_UserConversion: | ||||||
9649 | OS << "user-defined conversion via " << *S->Function.Function; | ||||||
9650 | break; | ||||||
9651 | |||||||
9652 | case SK_QualificationConversionPRValue: | ||||||
9653 | OS << "qualification conversion (prvalue)"; | ||||||
9654 | break; | ||||||
9655 | |||||||
9656 | case SK_QualificationConversionXValue: | ||||||
9657 | OS << "qualification conversion (xvalue)"; | ||||||
9658 | break; | ||||||
9659 | |||||||
9660 | case SK_QualificationConversionLValue: | ||||||
9661 | OS << "qualification conversion (lvalue)"; | ||||||
9662 | break; | ||||||
9663 | |||||||
9664 | case SK_FunctionReferenceConversion: | ||||||
9665 | OS << "function reference conversion"; | ||||||
9666 | break; | ||||||
9667 | |||||||
9668 | case SK_AtomicConversion: | ||||||
9669 | OS << "non-atomic-to-atomic conversion"; | ||||||
9670 | break; | ||||||
9671 | |||||||
9672 | case SK_ConversionSequence: | ||||||
9673 | OS << "implicit conversion sequence ("; | ||||||
9674 | S->ICS->dump(); // FIXME: use OS | ||||||
9675 | OS << ")"; | ||||||
9676 | break; | ||||||
9677 | |||||||
9678 | case SK_ConversionSequenceNoNarrowing: | ||||||
9679 | OS << "implicit conversion sequence with narrowing prohibited ("; | ||||||
9680 | S->ICS->dump(); // FIXME: use OS | ||||||
9681 | OS << ")"; | ||||||
9682 | break; | ||||||
9683 | |||||||
9684 | case SK_ListInitialization: | ||||||
9685 | OS << "list aggregate initialization"; | ||||||
9686 | break; | ||||||
9687 | |||||||
9688 | case SK_UnwrapInitList: | ||||||
9689 | OS << "unwrap reference initializer list"; | ||||||
9690 | break; | ||||||
9691 | |||||||
9692 | case SK_RewrapInitList: | ||||||
9693 | OS << "rewrap reference initializer list"; | ||||||
9694 | break; | ||||||
9695 | |||||||
9696 | case SK_ConstructorInitialization: | ||||||
9697 | OS << "constructor initialization"; | ||||||
9698 | break; | ||||||
9699 | |||||||
9700 | case SK_ConstructorInitializationFromList: | ||||||
9701 | OS << "list initialization via constructor"; | ||||||
9702 | break; | ||||||
9703 | |||||||
9704 | case SK_ZeroInitialization: | ||||||
9705 | OS << "zero initialization"; | ||||||
9706 | break; | ||||||
9707 | |||||||
9708 | case SK_CAssignment: | ||||||
9709 | OS << "C assignment"; | ||||||
9710 | break; | ||||||
9711 | |||||||
9712 | case SK_StringInit: | ||||||
9713 | OS << "string initialization"; | ||||||
9714 | break; | ||||||
9715 | |||||||
9716 | case SK_ObjCObjectConversion: | ||||||
9717 | OS << "Objective-C object conversion"; | ||||||
9718 | break; | ||||||
9719 | |||||||
9720 | case SK_ArrayLoopIndex: | ||||||
9721 | OS << "indexing for array initialization loop"; | ||||||
9722 | break; | ||||||
9723 | |||||||
9724 | case SK_ArrayLoopInit: | ||||||
9725 | OS << "array initialization loop"; | ||||||
9726 | break; | ||||||
9727 | |||||||
9728 | case SK_ArrayInit: | ||||||
9729 | OS << "array initialization"; | ||||||
9730 | break; | ||||||
9731 | |||||||
9732 | case SK_GNUArrayInit: | ||||||
9733 | OS << "array initialization (GNU extension)"; | ||||||
9734 | break; | ||||||
9735 | |||||||
9736 | case SK_ParenthesizedArrayInit: | ||||||
9737 | OS << "parenthesized array initialization"; | ||||||
9738 | break; | ||||||
9739 | |||||||
9740 | case SK_PassByIndirectCopyRestore: | ||||||
9741 | OS << "pass by indirect copy and restore"; | ||||||
9742 | break; | ||||||
9743 | |||||||
9744 | case SK_PassByIndirectRestore: | ||||||
9745 | OS << "pass by indirect restore"; | ||||||
9746 | break; | ||||||
9747 | |||||||
9748 | case SK_ProduceObjCObject: | ||||||
9749 | OS << "Objective-C object retension"; | ||||||
9750 | break; | ||||||
9751 | |||||||
9752 | case SK_StdInitializerList: | ||||||
9753 | OS << "std::initializer_list from initializer list"; | ||||||
9754 | break; | ||||||
9755 | |||||||
9756 | case SK_StdInitializerListConstructorCall: | ||||||
9757 | OS << "list initialization from std::initializer_list"; | ||||||
9758 | break; | ||||||
9759 | |||||||
9760 | case SK_OCLSamplerInit: | ||||||
9761 | OS << "OpenCL sampler_t from integer constant"; | ||||||
9762 | break; | ||||||
9763 | |||||||
9764 | case SK_OCLZeroOpaqueType: | ||||||
9765 | OS << "OpenCL opaque type from zero"; | ||||||
9766 | break; | ||||||
9767 | } | ||||||
9768 | |||||||
9769 | OS << " [" << S->Type.getAsString() << ']'; | ||||||
9770 | } | ||||||
9771 | |||||||
9772 | OS << '\n'; | ||||||
9773 | } | ||||||
9774 | |||||||
9775 | void InitializationSequence::dump() const { | ||||||
9776 | dump(llvm::errs()); | ||||||
9777 | } | ||||||
9778 | |||||||
9779 | static bool NarrowingErrs(const LangOptions &L) { | ||||||
9780 | return L.CPlusPlus11 && | ||||||
9781 | (!L.MicrosoftExt || L.isCompatibleWithMSVC(LangOptions::MSVC2015)); | ||||||
9782 | } | ||||||
9783 | |||||||
9784 | static void DiagnoseNarrowingInInitList(Sema &S, | ||||||
9785 | const ImplicitConversionSequence &ICS, | ||||||
9786 | QualType PreNarrowingType, | ||||||
9787 | QualType EntityType, | ||||||
9788 | const Expr *PostInit) { | ||||||
9789 | const StandardConversionSequence *SCS = nullptr; | ||||||
9790 | switch (ICS.getKind()) { | ||||||
9791 | case ImplicitConversionSequence::StandardConversion: | ||||||
9792 | SCS = &ICS.Standard; | ||||||
9793 | break; | ||||||
9794 | case ImplicitConversionSequence::UserDefinedConversion: | ||||||
9795 | SCS = &ICS.UserDefined.After; | ||||||
9796 | break; | ||||||
9797 | case ImplicitConversionSequence::AmbiguousConversion: | ||||||
9798 | case ImplicitConversionSequence::EllipsisConversion: | ||||||
9799 | case ImplicitConversionSequence::BadConversion: | ||||||
9800 | return; | ||||||
9801 | } | ||||||
9802 | |||||||
9803 | // C++11 [dcl.init.list]p7: Check whether this is a narrowing conversion. | ||||||
9804 | APValue ConstantValue; | ||||||
9805 | QualType ConstantType; | ||||||
9806 | switch (SCS->getNarrowingKind(S.Context, PostInit, ConstantValue, | ||||||
9807 | ConstantType)) { | ||||||
9808 | case NK_Not_Narrowing: | ||||||
9809 | case NK_Dependent_Narrowing: | ||||||
9810 | // No narrowing occurred. | ||||||
9811 | return; | ||||||
9812 | |||||||
9813 | case NK_Type_Narrowing: | ||||||
9814 | // This was a floating-to-integer conversion, which is always considered a | ||||||
9815 | // narrowing conversion even if the value is a constant and can be | ||||||
9816 | // represented exactly as an integer. | ||||||
9817 | S.Diag(PostInit->getBeginLoc(), NarrowingErrs(S.getLangOpts()) | ||||||
9818 | ? diag::ext_init_list_type_narrowing | ||||||
9819 | : diag::warn_init_list_type_narrowing) | ||||||
9820 | << PostInit->getSourceRange() | ||||||
9821 | << PreNarrowingType.getLocalUnqualifiedType() | ||||||
9822 | << EntityType.getLocalUnqualifiedType(); | ||||||
9823 | break; | ||||||
9824 | |||||||
9825 | case NK_Constant_Narrowing: | ||||||
9826 | // A constant value was narrowed. | ||||||
9827 | S.Diag(PostInit->getBeginLoc(), | ||||||
9828 | NarrowingErrs(S.getLangOpts()) | ||||||
9829 | ? diag::ext_init_list_constant_narrowing | ||||||
9830 | : diag::warn_init_list_constant_narrowing) | ||||||
9831 | << PostInit->getSourceRange() | ||||||
9832 | << ConstantValue.getAsString(S.getASTContext(), ConstantType) | ||||||
9833 | << EntityType.getLocalUnqualifiedType(); | ||||||
9834 | break; | ||||||
9835 | |||||||
9836 | case NK_Variable_Narrowing: | ||||||
9837 | // A variable's value may have been narrowed. | ||||||
9838 | S.Diag(PostInit->getBeginLoc(), | ||||||
9839 | NarrowingErrs(S.getLangOpts()) | ||||||
9840 | ? diag::ext_init_list_variable_narrowing | ||||||
9841 | : diag::warn_init_list_variable_narrowing) | ||||||
9842 | << PostInit->getSourceRange() | ||||||
9843 | << PreNarrowingType.getLocalUnqualifiedType() | ||||||
9844 | << EntityType.getLocalUnqualifiedType(); | ||||||
9845 | break; | ||||||
9846 | } | ||||||
9847 | |||||||
9848 | SmallString<128> StaticCast; | ||||||
9849 | llvm::raw_svector_ostream OS(StaticCast); | ||||||
9850 | OS << "static_cast<"; | ||||||
9851 | if (const TypedefType *TT = EntityType->getAs<TypedefType>()) { | ||||||
9852 | // It's important to use the typedef's name if there is one so that the | ||||||
9853 | // fixit doesn't break code using types like int64_t. | ||||||
9854 | // | ||||||
9855 | // FIXME: This will break if the typedef requires qualification. But | ||||||
9856 | // getQualifiedNameAsString() includes non-machine-parsable components. | ||||||
9857 | OS << *TT->getDecl(); | ||||||
9858 | } else if (const BuiltinType *BT = EntityType->getAs<BuiltinType>()) | ||||||
9859 | OS << BT->getName(S.getLangOpts()); | ||||||
9860 | else { | ||||||
9861 | // Oops, we didn't find the actual type of the variable. Don't emit a fixit | ||||||
9862 | // with a broken cast. | ||||||
9863 | return; | ||||||
9864 | } | ||||||
9865 | OS << ">("; | ||||||
9866 | S.Diag(PostInit->getBeginLoc(), diag::note_init_list_narrowing_silence) | ||||||
9867 | << PostInit->getSourceRange() | ||||||
9868 | << FixItHint::CreateInsertion(PostInit->getBeginLoc(), OS.str()) | ||||||
9869 | << FixItHint::CreateInsertion( | ||||||
9870 | S.getLocForEndOfToken(PostInit->getEndLoc()), ")"); | ||||||
9871 | } | ||||||
9872 | |||||||
9873 | //===----------------------------------------------------------------------===// | ||||||
9874 | // Initialization helper functions | ||||||
9875 | //===----------------------------------------------------------------------===// | ||||||
9876 | bool | ||||||
9877 | Sema::CanPerformCopyInitialization(const InitializedEntity &Entity, | ||||||
9878 | ExprResult Init) { | ||||||
9879 | if (Init.isInvalid()) | ||||||
9880 | return false; | ||||||
9881 | |||||||
9882 | Expr *InitE = Init.get(); | ||||||
9883 | assert(InitE && "No initialization expression")(static_cast <bool> (InitE && "No initialization expression" ) ? void (0) : __assert_fail ("InitE && \"No initialization expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9883, __extension__ __PRETTY_FUNCTION__)); | ||||||
9884 | |||||||
9885 | InitializationKind Kind = | ||||||
9886 | InitializationKind::CreateCopy(InitE->getBeginLoc(), SourceLocation()); | ||||||
9887 | InitializationSequence Seq(*this, Entity, Kind, InitE); | ||||||
9888 | return !Seq.Failed(); | ||||||
9889 | } | ||||||
9890 | |||||||
9891 | ExprResult | ||||||
9892 | Sema::PerformCopyInitialization(const InitializedEntity &Entity, | ||||||
9893 | SourceLocation EqualLoc, | ||||||
9894 | ExprResult Init, | ||||||
9895 | bool TopLevelOfInitList, | ||||||
9896 | bool AllowExplicit) { | ||||||
9897 | if (Init.isInvalid()) | ||||||
9898 | return ExprError(); | ||||||
9899 | |||||||
9900 | Expr *InitE = Init.get(); | ||||||
9901 | assert(InitE && "No initialization expression?")(static_cast <bool> (InitE && "No initialization expression?" ) ? void (0) : __assert_fail ("InitE && \"No initialization expression?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9901, __extension__ __PRETTY_FUNCTION__)); | ||||||
9902 | |||||||
9903 | if (EqualLoc.isInvalid()) | ||||||
9904 | EqualLoc = InitE->getBeginLoc(); | ||||||
9905 | |||||||
9906 | InitializationKind Kind = InitializationKind::CreateCopy( | ||||||
9907 | InitE->getBeginLoc(), EqualLoc, AllowExplicit); | ||||||
9908 | InitializationSequence Seq(*this, Entity, Kind, InitE, TopLevelOfInitList); | ||||||
9909 | |||||||
9910 | // Prevent infinite recursion when performing parameter copy-initialization. | ||||||
9911 | const bool ShouldTrackCopy = | ||||||
9912 | Entity.isParameterKind() && Seq.isConstructorInitialization(); | ||||||
9913 | if (ShouldTrackCopy) { | ||||||
9914 | if (llvm::find(CurrentParameterCopyTypes, Entity.getType()) != | ||||||
9915 | CurrentParameterCopyTypes.end()) { | ||||||
9916 | Seq.SetOverloadFailure( | ||||||
9917 | InitializationSequence::FK_ConstructorOverloadFailed, | ||||||
9918 | OR_No_Viable_Function); | ||||||
9919 | |||||||
9920 | // Try to give a meaningful diagnostic note for the problematic | ||||||
9921 | // constructor. | ||||||
9922 | const auto LastStep = Seq.step_end() - 1; | ||||||
9923 | assert(LastStep->Kind ==(static_cast <bool> (LastStep->Kind == InitializationSequence ::SK_ConstructorInitialization) ? void (0) : __assert_fail ("LastStep->Kind == InitializationSequence::SK_ConstructorInitialization" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9924, __extension__ __PRETTY_FUNCTION__)) | ||||||
9924 | InitializationSequence::SK_ConstructorInitialization)(static_cast <bool> (LastStep->Kind == InitializationSequence ::SK_ConstructorInitialization) ? void (0) : __assert_fail ("LastStep->Kind == InitializationSequence::SK_ConstructorInitialization" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9924, __extension__ __PRETTY_FUNCTION__)); | ||||||
9925 | const FunctionDecl *Function = LastStep->Function.Function; | ||||||
9926 | auto Candidate = | ||||||
9927 | llvm::find_if(Seq.getFailedCandidateSet(), | ||||||
9928 | [Function](const OverloadCandidate &Candidate) -> bool { | ||||||
9929 | return Candidate.Viable && | ||||||
9930 | Candidate.Function == Function && | ||||||
9931 | Candidate.Conversions.size() > 0; | ||||||
9932 | }); | ||||||
9933 | if (Candidate != Seq.getFailedCandidateSet().end() && | ||||||
9934 | Function->getNumParams() > 0) { | ||||||
9935 | Candidate->Viable = false; | ||||||
9936 | Candidate->FailureKind = ovl_fail_bad_conversion; | ||||||
9937 | Candidate->Conversions[0].setBad(BadConversionSequence::no_conversion, | ||||||
9938 | InitE, | ||||||
9939 | Function->getParamDecl(0)->getType()); | ||||||
9940 | } | ||||||
9941 | } | ||||||
9942 | CurrentParameterCopyTypes.push_back(Entity.getType()); | ||||||
9943 | } | ||||||
9944 | |||||||
9945 | ExprResult Result = Seq.Perform(*this, Entity, Kind, InitE); | ||||||
9946 | |||||||
9947 | if (ShouldTrackCopy) | ||||||
9948 | CurrentParameterCopyTypes.pop_back(); | ||||||
9949 | |||||||
9950 | return Result; | ||||||
9951 | } | ||||||
9952 | |||||||
9953 | /// Determine whether RD is, or is derived from, a specialization of CTD. | ||||||
9954 | static bool isOrIsDerivedFromSpecializationOf(CXXRecordDecl *RD, | ||||||
9955 | ClassTemplateDecl *CTD) { | ||||||
9956 | auto NotSpecialization = [&] (const CXXRecordDecl *Candidate) { | ||||||
9957 | auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Candidate); | ||||||
9958 | return !CTSD || !declaresSameEntity(CTSD->getSpecializedTemplate(), CTD); | ||||||
9959 | }; | ||||||
9960 | return !(NotSpecialization(RD) && RD->forallBases(NotSpecialization)); | ||||||
9961 | } | ||||||
9962 | |||||||
9963 | QualType Sema::DeduceTemplateSpecializationFromInitializer( | ||||||
9964 | TypeSourceInfo *TSInfo, const InitializedEntity &Entity, | ||||||
9965 | const InitializationKind &Kind, MultiExprArg Inits) { | ||||||
9966 | auto *DeducedTST = dyn_cast<DeducedTemplateSpecializationType>( | ||||||
9967 | TSInfo->getType()->getContainedDeducedType()); | ||||||
9968 | assert(DeducedTST && "not a deduced template specialization type")(static_cast <bool> (DeducedTST && "not a deduced template specialization type" ) ? void (0) : __assert_fail ("DeducedTST && \"not a deduced template specialization type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9968, __extension__ __PRETTY_FUNCTION__)); | ||||||
9969 | |||||||
9970 | auto TemplateName = DeducedTST->getTemplateName(); | ||||||
9971 | if (TemplateName.isDependent()) | ||||||
9972 | return SubstAutoType(TSInfo->getType(), Context.DependentTy); | ||||||
9973 | |||||||
9974 | // We can only perform deduction for class templates. | ||||||
9975 | auto *Template = | ||||||
9976 | dyn_cast_or_null<ClassTemplateDecl>(TemplateName.getAsTemplateDecl()); | ||||||
9977 | if (!Template) { | ||||||
9978 | Diag(Kind.getLocation(), | ||||||
9979 | diag::err_deduced_non_class_template_specialization_type) | ||||||
9980 | << (int)getTemplateNameKindForDiagnostics(TemplateName) << TemplateName; | ||||||
9981 | if (auto *TD = TemplateName.getAsTemplateDecl()) | ||||||
9982 | Diag(TD->getLocation(), diag::note_template_decl_here); | ||||||
9983 | return QualType(); | ||||||
9984 | } | ||||||
9985 | |||||||
9986 | // Can't deduce from dependent arguments. | ||||||
9987 | if (Expr::hasAnyTypeDependentArguments(Inits)) { | ||||||
9988 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||||
9989 | diag::warn_cxx14_compat_class_template_argument_deduction) | ||||||
9990 | << TSInfo->getTypeLoc().getSourceRange() << 0; | ||||||
9991 | return SubstAutoType(TSInfo->getType(), Context.DependentTy); | ||||||
9992 | } | ||||||
9993 | |||||||
9994 | // FIXME: Perform "exact type" matching first, per CWG discussion? | ||||||
9995 | // Or implement this via an implied 'T(T) -> T' deduction guide? | ||||||
9996 | |||||||
9997 | // FIXME: Do we need/want a std::initializer_list<T> special case? | ||||||
9998 | |||||||
9999 | // Look up deduction guides, including those synthesized from constructors. | ||||||
10000 | // | ||||||
10001 | // C++1z [over.match.class.deduct]p1: | ||||||
10002 | // A set of functions and function templates is formed comprising: | ||||||
10003 | // - For each constructor of the class template designated by the | ||||||
10004 | // template-name, a function template [...] | ||||||
10005 | // - For each deduction-guide, a function or function template [...] | ||||||
10006 | DeclarationNameInfo NameInfo( | ||||||
10007 | Context.DeclarationNames.getCXXDeductionGuideName(Template), | ||||||
10008 | TSInfo->getTypeLoc().getEndLoc()); | ||||||
10009 | LookupResult Guides(*this, NameInfo, LookupOrdinaryName); | ||||||
10010 | LookupQualifiedName(Guides, Template->getDeclContext()); | ||||||
10011 | |||||||
10012 | // FIXME: Do not diagnose inaccessible deduction guides. The standard isn't | ||||||
10013 | // clear on this, but they're not found by name so access does not apply. | ||||||
10014 | Guides.suppressDiagnostics(); | ||||||
10015 | |||||||
10016 | // Figure out if this is list-initialization. | ||||||
10017 | InitListExpr *ListInit = | ||||||
10018 | (Inits.size() == 1 && Kind.getKind() != InitializationKind::IK_Direct) | ||||||
10019 | ? dyn_cast<InitListExpr>(Inits[0]) | ||||||
10020 | : nullptr; | ||||||
10021 | |||||||
10022 | // C++1z [over.match.class.deduct]p1: | ||||||
10023 | // Initialization and overload resolution are performed as described in | ||||||
10024 | // [dcl.init] and [over.match.ctor], [over.match.copy], or [over.match.list] | ||||||
10025 | // (as appropriate for the type of initialization performed) for an object | ||||||
10026 | // of a hypothetical class type, where the selected functions and function | ||||||
10027 | // templates are considered to be the constructors of that class type | ||||||
10028 | // | ||||||
10029 | // Since we know we're initializing a class type of a type unrelated to that | ||||||
10030 | // of the initializer, this reduces to something fairly reasonable. | ||||||
10031 | OverloadCandidateSet Candidates(Kind.getLocation(), | ||||||
10032 | OverloadCandidateSet::CSK_Normal); | ||||||
10033 | OverloadCandidateSet::iterator Best; | ||||||
10034 | |||||||
10035 | bool HasAnyDeductionGuide = false; | ||||||
10036 | bool AllowExplicit = !Kind.isCopyInit() || ListInit; | ||||||
10037 | |||||||
10038 | auto tryToResolveOverload = | ||||||
10039 | [&](bool OnlyListConstructors) -> OverloadingResult { | ||||||
10040 | Candidates.clear(OverloadCandidateSet::CSK_Normal); | ||||||
10041 | HasAnyDeductionGuide = false; | ||||||
10042 | |||||||
10043 | for (auto I = Guides.begin(), E = Guides.end(); I != E; ++I) { | ||||||
10044 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||
10045 | if (D->isInvalidDecl()) | ||||||
10046 | continue; | ||||||
10047 | |||||||
10048 | auto *TD = dyn_cast<FunctionTemplateDecl>(D); | ||||||
10049 | auto *GD = dyn_cast_or_null<CXXDeductionGuideDecl>( | ||||||
10050 | TD ? TD->getTemplatedDecl() : dyn_cast<FunctionDecl>(D)); | ||||||
10051 | if (!GD) | ||||||
10052 | continue; | ||||||
10053 | |||||||
10054 | if (!GD->isImplicit()) | ||||||
10055 | HasAnyDeductionGuide = true; | ||||||
10056 | |||||||
10057 | // C++ [over.match.ctor]p1: (non-list copy-initialization from non-class) | ||||||
10058 | // For copy-initialization, the candidate functions are all the | ||||||
10059 | // converting constructors (12.3.1) of that class. | ||||||
10060 | // C++ [over.match.copy]p1: (non-list copy-initialization from class) | ||||||
10061 | // The converting constructors of T are candidate functions. | ||||||
10062 | if (!AllowExplicit) { | ||||||
10063 | // Overload resolution checks whether the deduction guide is declared | ||||||
10064 | // explicit for us. | ||||||
10065 | |||||||
10066 | // When looking for a converting constructor, deduction guides that | ||||||
10067 | // could never be called with one argument are not interesting to | ||||||
10068 | // check or note. | ||||||
10069 | if (GD->getMinRequiredArguments() > 1 || | ||||||
10070 | (GD->getNumParams() == 0 && !GD->isVariadic())) | ||||||
10071 | continue; | ||||||
10072 | } | ||||||
10073 | |||||||
10074 | // C++ [over.match.list]p1.1: (first phase list initialization) | ||||||
10075 | // Initially, the candidate functions are the initializer-list | ||||||
10076 | // constructors of the class T | ||||||
10077 | if (OnlyListConstructors && !isInitListConstructor(GD)) | ||||||
10078 | continue; | ||||||
10079 | |||||||
10080 | // C++ [over.match.list]p1.2: (second phase list initialization) | ||||||
10081 | // the candidate functions are all the constructors of the class T | ||||||
10082 | // C++ [over.match.ctor]p1: (all other cases) | ||||||
10083 | // the candidate functions are all the constructors of the class of | ||||||
10084 | // the object being initialized | ||||||
10085 | |||||||
10086 | // C++ [over.best.ics]p4: | ||||||
10087 | // When [...] the constructor [...] is a candidate by | ||||||
10088 | // - [over.match.copy] (in all cases) | ||||||
10089 | // FIXME: The "second phase of [over.match.list] case can also | ||||||
10090 | // theoretically happen here, but it's not clear whether we can | ||||||
10091 | // ever have a parameter of the right type. | ||||||
10092 | bool SuppressUserConversions = Kind.isCopyInit(); | ||||||
10093 | |||||||
10094 | if (TD) | ||||||
10095 | AddTemplateOverloadCandidate(TD, I.getPair(), /*ExplicitArgs*/ nullptr, | ||||||
10096 | Inits, Candidates, SuppressUserConversions, | ||||||
10097 | /*PartialOverloading*/ false, | ||||||
10098 | AllowExplicit); | ||||||
10099 | else | ||||||
10100 | AddOverloadCandidate(GD, I.getPair(), Inits, Candidates, | ||||||
10101 | SuppressUserConversions, | ||||||
10102 | /*PartialOverloading*/ false, AllowExplicit); | ||||||
10103 | } | ||||||
10104 | return Candidates.BestViableFunction(*this, Kind.getLocation(), Best); | ||||||
10105 | }; | ||||||
10106 | |||||||
10107 | OverloadingResult Result = OR_No_Viable_Function; | ||||||
10108 | |||||||
10109 | // C++11 [over.match.list]p1, per DR1467: for list-initialization, first | ||||||
10110 | // try initializer-list constructors. | ||||||
10111 | if (ListInit) { | ||||||
10112 | bool TryListConstructors = true; | ||||||
10113 | |||||||
10114 | // Try list constructors unless the list is empty and the class has one or | ||||||
10115 | // more default constructors, in which case those constructors win. | ||||||
10116 | if (!ListInit->getNumInits()) { | ||||||
10117 | for (NamedDecl *D : Guides) { | ||||||
10118 | auto *FD = dyn_cast<FunctionDecl>(D->getUnderlyingDecl()); | ||||||
10119 | if (FD && FD->getMinRequiredArguments() == 0) { | ||||||
10120 | TryListConstructors = false; | ||||||
10121 | break; | ||||||
10122 | } | ||||||
10123 | } | ||||||
10124 | } else if (ListInit->getNumInits() == 1) { | ||||||
10125 | // C++ [over.match.class.deduct]: | ||||||
10126 | // As an exception, the first phase in [over.match.list] (considering | ||||||
10127 | // initializer-list constructors) is omitted if the initializer list | ||||||
10128 | // consists of a single expression of type cv U, where U is a | ||||||
10129 | // specialization of C or a class derived from a specialization of C. | ||||||
10130 | Expr *E = ListInit->getInit(0); | ||||||
10131 | auto *RD = E->getType()->getAsCXXRecordDecl(); | ||||||
10132 | if (!isa<InitListExpr>(E) && RD && | ||||||
10133 | isCompleteType(Kind.getLocation(), E->getType()) && | ||||||
10134 | isOrIsDerivedFromSpecializationOf(RD, Template)) | ||||||
10135 | TryListConstructors = false; | ||||||
10136 | } | ||||||
10137 | |||||||
10138 | if (TryListConstructors) | ||||||
10139 | Result = tryToResolveOverload(/*OnlyListConstructor*/true); | ||||||
10140 | // Then unwrap the initializer list and try again considering all | ||||||
10141 | // constructors. | ||||||
10142 | Inits = MultiExprArg(ListInit->getInits(), ListInit->getNumInits()); | ||||||
10143 | } | ||||||
10144 | |||||||
10145 | // If list-initialization fails, or if we're doing any other kind of | ||||||
10146 | // initialization, we (eventually) consider constructors. | ||||||
10147 | if (Result == OR_No_Viable_Function) | ||||||
10148 | Result = tryToResolveOverload(/*OnlyListConstructor*/false); | ||||||
10149 | |||||||
10150 | switch (Result) { | ||||||
10151 | case OR_Ambiguous: | ||||||
10152 | // FIXME: For list-initialization candidates, it'd usually be better to | ||||||
10153 | // list why they were not viable when given the initializer list itself as | ||||||
10154 | // an argument. | ||||||
10155 | Candidates.NoteCandidates( | ||||||
10156 | PartialDiagnosticAt( | ||||||
10157 | Kind.getLocation(), | ||||||
10158 | PDiag(diag::err_deduced_class_template_ctor_ambiguous) | ||||||
10159 | << TemplateName), | ||||||
10160 | *this, OCD_AmbiguousCandidates, Inits); | ||||||
10161 | return QualType(); | ||||||
10162 | |||||||
10163 | case OR_No_Viable_Function: { | ||||||
10164 | CXXRecordDecl *Primary = | ||||||
10165 | cast<ClassTemplateDecl>(Template)->getTemplatedDecl(); | ||||||
10166 | bool Complete = | ||||||
10167 | isCompleteType(Kind.getLocation(), Context.getTypeDeclType(Primary)); | ||||||
10168 | Candidates.NoteCandidates( | ||||||
10169 | PartialDiagnosticAt( | ||||||
10170 | Kind.getLocation(), | ||||||
10171 | PDiag(Complete ? diag::err_deduced_class_template_ctor_no_viable | ||||||
10172 | : diag::err_deduced_class_template_incomplete) | ||||||
10173 | << TemplateName << !Guides.empty()), | ||||||
10174 | *this, OCD_AllCandidates, Inits); | ||||||
10175 | return QualType(); | ||||||
10176 | } | ||||||
10177 | |||||||
10178 | case OR_Deleted: { | ||||||
10179 | Diag(Kind.getLocation(), diag::err_deduced_class_template_deleted) | ||||||
10180 | << TemplateName; | ||||||
10181 | NoteDeletedFunction(Best->Function); | ||||||
10182 | return QualType(); | ||||||
10183 | } | ||||||
10184 | |||||||
10185 | case OR_Success: | ||||||
10186 | // C++ [over.match.list]p1: | ||||||
10187 | // In copy-list-initialization, if an explicit constructor is chosen, the | ||||||
10188 | // initialization is ill-formed. | ||||||
10189 | if (Kind.isCopyInit() && ListInit && | ||||||
10190 | cast<CXXDeductionGuideDecl>(Best->Function)->isExplicit()) { | ||||||
10191 | bool IsDeductionGuide = !Best->Function->isImplicit(); | ||||||
10192 | Diag(Kind.getLocation(), diag::err_deduced_class_template_explicit) | ||||||
10193 | << TemplateName << IsDeductionGuide; | ||||||
10194 | Diag(Best->Function->getLocation(), | ||||||
10195 | diag::note_explicit_ctor_deduction_guide_here) | ||||||
10196 | << IsDeductionGuide; | ||||||
10197 | return QualType(); | ||||||
10198 | } | ||||||
10199 | |||||||
10200 | // Make sure we didn't select an unusable deduction guide, and mark it | ||||||
10201 | // as referenced. | ||||||
10202 | DiagnoseUseOfDecl(Best->Function, Kind.getLocation()); | ||||||
10203 | MarkFunctionReferenced(Kind.getLocation(), Best->Function); | ||||||
10204 | break; | ||||||
10205 | } | ||||||
10206 | |||||||
10207 | // C++ [dcl.type.class.deduct]p1: | ||||||
10208 | // The placeholder is replaced by the return type of the function selected | ||||||
10209 | // by overload resolution for class template deduction. | ||||||
10210 | QualType DeducedType = | ||||||
10211 | SubstAutoType(TSInfo->getType(), Best->Function->getReturnType()); | ||||||
10212 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||||
10213 | diag::warn_cxx14_compat_class_template_argument_deduction) | ||||||
10214 | << TSInfo->getTypeLoc().getSourceRange() << 1 << DeducedType; | ||||||
10215 | |||||||
10216 | // Warn if CTAD was used on a type that does not have any user-defined | ||||||
10217 | // deduction guides. | ||||||
10218 | if (!HasAnyDeductionGuide) { | ||||||
10219 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||||
10220 | diag::warn_ctad_maybe_unsupported) | ||||||
10221 | << TemplateName; | ||||||
10222 | Diag(Template->getLocation(), diag::note_suppress_ctad_maybe_unsupported); | ||||||
10223 | } | ||||||
10224 | |||||||
10225 | return DeducedType; | ||||||
10226 | } |
1 | //===- Decl.h - Classes for representing declarations -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the Decl subclasses. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_DECL_H |
14 | #define LLVM_CLANG_AST_DECL_H |
15 | |
16 | #include "clang/AST/APValue.h" |
17 | #include "clang/AST/ASTContextAllocate.h" |
18 | #include "clang/AST/DeclAccessPair.h" |
19 | #include "clang/AST/DeclBase.h" |
20 | #include "clang/AST/DeclarationName.h" |
21 | #include "clang/AST/ExternalASTSource.h" |
22 | #include "clang/AST/NestedNameSpecifier.h" |
23 | #include "clang/AST/Redeclarable.h" |
24 | #include "clang/AST/Type.h" |
25 | #include "clang/Basic/AddressSpaces.h" |
26 | #include "clang/Basic/Diagnostic.h" |
27 | #include "clang/Basic/IdentifierTable.h" |
28 | #include "clang/Basic/LLVM.h" |
29 | #include "clang/Basic/Linkage.h" |
30 | #include "clang/Basic/OperatorKinds.h" |
31 | #include "clang/Basic/PartialDiagnostic.h" |
32 | #include "clang/Basic/PragmaKinds.h" |
33 | #include "clang/Basic/SourceLocation.h" |
34 | #include "clang/Basic/Specifiers.h" |
35 | #include "clang/Basic/Visibility.h" |
36 | #include "llvm/ADT/APSInt.h" |
37 | #include "llvm/ADT/ArrayRef.h" |
38 | #include "llvm/ADT/Optional.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/StringRef.h" |
42 | #include "llvm/ADT/iterator_range.h" |
43 | #include "llvm/Support/Casting.h" |
44 | #include "llvm/Support/Compiler.h" |
45 | #include "llvm/Support/TrailingObjects.h" |
46 | #include <cassert> |
47 | #include <cstddef> |
48 | #include <cstdint> |
49 | #include <string> |
50 | #include <utility> |
51 | |
52 | namespace clang { |
53 | |
54 | class ASTContext; |
55 | struct ASTTemplateArgumentListInfo; |
56 | class Attr; |
57 | class CompoundStmt; |
58 | class DependentFunctionTemplateSpecializationInfo; |
59 | class EnumDecl; |
60 | class Expr; |
61 | class FunctionTemplateDecl; |
62 | class FunctionTemplateSpecializationInfo; |
63 | class FunctionTypeLoc; |
64 | class LabelStmt; |
65 | class MemberSpecializationInfo; |
66 | class Module; |
67 | class NamespaceDecl; |
68 | class ParmVarDecl; |
69 | class RecordDecl; |
70 | class Stmt; |
71 | class StringLiteral; |
72 | class TagDecl; |
73 | class TemplateArgumentList; |
74 | class TemplateArgumentListInfo; |
75 | class TemplateParameterList; |
76 | class TypeAliasTemplateDecl; |
77 | class TypeLoc; |
78 | class UnresolvedSetImpl; |
79 | class VarTemplateDecl; |
80 | |
81 | /// The top declaration context. |
82 | class TranslationUnitDecl : public Decl, |
83 | public DeclContext, |
84 | public Redeclarable<TranslationUnitDecl> { |
85 | using redeclarable_base = Redeclarable<TranslationUnitDecl>; |
86 | |
87 | TranslationUnitDecl *getNextRedeclarationImpl() override { |
88 | return getNextRedeclaration(); |
89 | } |
90 | |
91 | TranslationUnitDecl *getPreviousDeclImpl() override { |
92 | return getPreviousDecl(); |
93 | } |
94 | |
95 | TranslationUnitDecl *getMostRecentDeclImpl() override { |
96 | return getMostRecentDecl(); |
97 | } |
98 | |
99 | ASTContext &Ctx; |
100 | |
101 | /// The (most recently entered) anonymous namespace for this |
102 | /// translation unit, if one has been created. |
103 | NamespaceDecl *AnonymousNamespace = nullptr; |
104 | |
105 | explicit TranslationUnitDecl(ASTContext &ctx); |
106 | |
107 | virtual void anchor(); |
108 | |
109 | public: |
110 | using redecl_range = redeclarable_base::redecl_range; |
111 | using redecl_iterator = redeclarable_base::redecl_iterator; |
112 | |
113 | using redeclarable_base::getMostRecentDecl; |
114 | using redeclarable_base::getPreviousDecl; |
115 | using redeclarable_base::isFirstDecl; |
116 | using redeclarable_base::redecls; |
117 | using redeclarable_base::redecls_begin; |
118 | using redeclarable_base::redecls_end; |
119 | |
120 | ASTContext &getASTContext() const { return Ctx; } |
121 | |
122 | NamespaceDecl *getAnonymousNamespace() const { return AnonymousNamespace; } |
123 | void setAnonymousNamespace(NamespaceDecl *D) { AnonymousNamespace = D; } |
124 | |
125 | static TranslationUnitDecl *Create(ASTContext &C); |
126 | |
127 | // Implement isa/cast/dyncast/etc. |
128 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
129 | static bool classofKind(Kind K) { return K == TranslationUnit; } |
130 | static DeclContext *castToDeclContext(const TranslationUnitDecl *D) { |
131 | return static_cast<DeclContext *>(const_cast<TranslationUnitDecl*>(D)); |
132 | } |
133 | static TranslationUnitDecl *castFromDeclContext(const DeclContext *DC) { |
134 | return static_cast<TranslationUnitDecl *>(const_cast<DeclContext*>(DC)); |
135 | } |
136 | }; |
137 | |
138 | /// Represents a `#pragma comment` line. Always a child of |
139 | /// TranslationUnitDecl. |
140 | class PragmaCommentDecl final |
141 | : public Decl, |
142 | private llvm::TrailingObjects<PragmaCommentDecl, char> { |
143 | friend class ASTDeclReader; |
144 | friend class ASTDeclWriter; |
145 | friend TrailingObjects; |
146 | |
147 | PragmaMSCommentKind CommentKind; |
148 | |
149 | PragmaCommentDecl(TranslationUnitDecl *TU, SourceLocation CommentLoc, |
150 | PragmaMSCommentKind CommentKind) |
151 | : Decl(PragmaComment, TU, CommentLoc), CommentKind(CommentKind) {} |
152 | |
153 | virtual void anchor(); |
154 | |
155 | public: |
156 | static PragmaCommentDecl *Create(const ASTContext &C, TranslationUnitDecl *DC, |
157 | SourceLocation CommentLoc, |
158 | PragmaMSCommentKind CommentKind, |
159 | StringRef Arg); |
160 | static PragmaCommentDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
161 | unsigned ArgSize); |
162 | |
163 | PragmaMSCommentKind getCommentKind() const { return CommentKind; } |
164 | |
165 | StringRef getArg() const { return getTrailingObjects<char>(); } |
166 | |
167 | // Implement isa/cast/dyncast/etc. |
168 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
169 | static bool classofKind(Kind K) { return K == PragmaComment; } |
170 | }; |
171 | |
172 | /// Represents a `#pragma detect_mismatch` line. Always a child of |
173 | /// TranslationUnitDecl. |
174 | class PragmaDetectMismatchDecl final |
175 | : public Decl, |
176 | private llvm::TrailingObjects<PragmaDetectMismatchDecl, char> { |
177 | friend class ASTDeclReader; |
178 | friend class ASTDeclWriter; |
179 | friend TrailingObjects; |
180 | |
181 | size_t ValueStart; |
182 | |
183 | PragmaDetectMismatchDecl(TranslationUnitDecl *TU, SourceLocation Loc, |
184 | size_t ValueStart) |
185 | : Decl(PragmaDetectMismatch, TU, Loc), ValueStart(ValueStart) {} |
186 | |
187 | virtual void anchor(); |
188 | |
189 | public: |
190 | static PragmaDetectMismatchDecl *Create(const ASTContext &C, |
191 | TranslationUnitDecl *DC, |
192 | SourceLocation Loc, StringRef Name, |
193 | StringRef Value); |
194 | static PragmaDetectMismatchDecl * |
195 | CreateDeserialized(ASTContext &C, unsigned ID, unsigned NameValueSize); |
196 | |
197 | StringRef getName() const { return getTrailingObjects<char>(); } |
198 | StringRef getValue() const { return getTrailingObjects<char>() + ValueStart; } |
199 | |
200 | // Implement isa/cast/dyncast/etc. |
201 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
202 | static bool classofKind(Kind K) { return K == PragmaDetectMismatch; } |
203 | }; |
204 | |
205 | /// Declaration context for names declared as extern "C" in C++. This |
206 | /// is neither the semantic nor lexical context for such declarations, but is |
207 | /// used to check for conflicts with other extern "C" declarations. Example: |
208 | /// |
209 | /// \code |
210 | /// namespace N { extern "C" void f(); } // #1 |
211 | /// void N::f() {} // #2 |
212 | /// namespace M { extern "C" void f(); } // #3 |
213 | /// \endcode |
214 | /// |
215 | /// The semantic context of #1 is namespace N and its lexical context is the |
216 | /// LinkageSpecDecl; the semantic context of #2 is namespace N and its lexical |
217 | /// context is the TU. However, both declarations are also visible in the |
218 | /// extern "C" context. |
219 | /// |
220 | /// The declaration at #3 finds it is a redeclaration of \c N::f through |
221 | /// lookup in the extern "C" context. |
222 | class ExternCContextDecl : public Decl, public DeclContext { |
223 | explicit ExternCContextDecl(TranslationUnitDecl *TU) |
224 | : Decl(ExternCContext, TU, SourceLocation()), |
225 | DeclContext(ExternCContext) {} |
226 | |
227 | virtual void anchor(); |
228 | |
229 | public: |
230 | static ExternCContextDecl *Create(const ASTContext &C, |
231 | TranslationUnitDecl *TU); |
232 | |
233 | // Implement isa/cast/dyncast/etc. |
234 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
235 | static bool classofKind(Kind K) { return K == ExternCContext; } |
236 | static DeclContext *castToDeclContext(const ExternCContextDecl *D) { |
237 | return static_cast<DeclContext *>(const_cast<ExternCContextDecl*>(D)); |
238 | } |
239 | static ExternCContextDecl *castFromDeclContext(const DeclContext *DC) { |
240 | return static_cast<ExternCContextDecl *>(const_cast<DeclContext*>(DC)); |
241 | } |
242 | }; |
243 | |
244 | /// This represents a decl that may have a name. Many decls have names such |
245 | /// as ObjCMethodDecl, but not \@class, etc. |
246 | /// |
247 | /// Note that not every NamedDecl is actually named (e.g., a struct might |
248 | /// be anonymous), and not every name is an identifier. |
249 | class NamedDecl : public Decl { |
250 | /// The name of this declaration, which is typically a normal |
251 | /// identifier but may also be a special kind of name (C++ |
252 | /// constructor, Objective-C selector, etc.) |
253 | DeclarationName Name; |
254 | |
255 | virtual void anchor(); |
256 | |
257 | private: |
258 | NamedDecl *getUnderlyingDeclImpl() LLVM_READONLY__attribute__((__pure__)); |
259 | |
260 | protected: |
261 | NamedDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N) |
262 | : Decl(DK, DC, L), Name(N) {} |
263 | |
264 | public: |
265 | /// Get the identifier that names this declaration, if there is one. |
266 | /// |
267 | /// This will return NULL if this declaration has no name (e.g., for |
268 | /// an unnamed class) or if the name is a special name (C++ constructor, |
269 | /// Objective-C selector, etc.). |
270 | IdentifierInfo *getIdentifier() const { return Name.getAsIdentifierInfo(); } |
271 | |
272 | /// Get the name of identifier for this declaration as a StringRef. |
273 | /// |
274 | /// This requires that the declaration have a name and that it be a simple |
275 | /// identifier. |
276 | StringRef getName() const { |
277 | assert(Name.isIdentifier() && "Name is not a simple identifier")(static_cast <bool> (Name.isIdentifier() && "Name is not a simple identifier" ) ? void (0) : __assert_fail ("Name.isIdentifier() && \"Name is not a simple identifier\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 277, __extension__ __PRETTY_FUNCTION__)); |
278 | return getIdentifier() ? getIdentifier()->getName() : ""; |
279 | } |
280 | |
281 | /// Get a human-readable name for the declaration, even if it is one of the |
282 | /// special kinds of names (C++ constructor, Objective-C selector, etc). |
283 | /// |
284 | /// Creating this name requires expensive string manipulation, so it should |
285 | /// be called only when performance doesn't matter. For simple declarations, |
286 | /// getNameAsCString() should suffice. |
287 | // |
288 | // FIXME: This function should be renamed to indicate that it is not just an |
289 | // alternate form of getName(), and clients should move as appropriate. |
290 | // |
291 | // FIXME: Deprecated, move clients to getName(). |
292 | std::string getNameAsString() const { return Name.getAsString(); } |
293 | |
294 | /// Pretty-print the unqualified name of this declaration. Can be overloaded |
295 | /// by derived classes to provide a more user-friendly name when appropriate. |
296 | virtual void printName(raw_ostream &os) const; |
297 | |
298 | /// Get the actual, stored name of the declaration, which may be a special |
299 | /// name. |
300 | /// |
301 | /// Note that generally in diagnostics, the non-null \p NamedDecl* itself |
302 | /// should be sent into the diagnostic instead of using the result of |
303 | /// \p getDeclName(). |
304 | /// |
305 | /// A \p DeclarationName in a diagnostic will just be streamed to the output, |
306 | /// which will directly result in a call to \p DeclarationName::print. |
307 | /// |
308 | /// A \p NamedDecl* in a diagnostic will also ultimately result in a call to |
309 | /// \p DeclarationName::print, but with two customisation points along the |
310 | /// way (\p getNameForDiagnostic and \p printName). These are used to print |
311 | /// the template arguments if any, and to provide a user-friendly name for |
312 | /// some entities (such as unnamed variables and anonymous records). |
313 | DeclarationName getDeclName() const { return Name; } |
314 | |
315 | /// Set the name of this declaration. |
316 | void setDeclName(DeclarationName N) { Name = N; } |
317 | |
318 | /// Returns a human-readable qualified name for this declaration, like |
319 | /// A::B::i, for i being member of namespace A::B. |
320 | /// |
321 | /// If the declaration is not a member of context which can be named (record, |
322 | /// namespace), it will return the same result as printName(). |
323 | /// |
324 | /// Creating this name is expensive, so it should be called only when |
325 | /// performance doesn't matter. |
326 | void printQualifiedName(raw_ostream &OS) const; |
327 | void printQualifiedName(raw_ostream &OS, const PrintingPolicy &Policy) const; |
328 | |
329 | /// Print only the nested name specifier part of a fully-qualified name, |
330 | /// including the '::' at the end. E.g. |
331 | /// when `printQualifiedName(D)` prints "A::B::i", |
332 | /// this function prints "A::B::". |
333 | void printNestedNameSpecifier(raw_ostream &OS) const; |
334 | void printNestedNameSpecifier(raw_ostream &OS, |
335 | const PrintingPolicy &Policy) const; |
336 | |
337 | // FIXME: Remove string version. |
338 | std::string getQualifiedNameAsString() const; |
339 | |
340 | /// Appends a human-readable name for this declaration into the given stream. |
341 | /// |
342 | /// This is the method invoked by Sema when displaying a NamedDecl |
343 | /// in a diagnostic. It does not necessarily produce the same |
344 | /// result as printName(); for example, class template |
345 | /// specializations are printed with their template arguments. |
346 | virtual void getNameForDiagnostic(raw_ostream &OS, |
347 | const PrintingPolicy &Policy, |
348 | bool Qualified) const; |
349 | |
350 | /// Determine whether this declaration, if known to be well-formed within |
351 | /// its context, will replace the declaration OldD if introduced into scope. |
352 | /// |
353 | /// A declaration will replace another declaration if, for example, it is |
354 | /// a redeclaration of the same variable or function, but not if it is a |
355 | /// declaration of a different kind (function vs. class) or an overloaded |
356 | /// function. |
357 | /// |
358 | /// \param IsKnownNewer \c true if this declaration is known to be newer |
359 | /// than \p OldD (for instance, if this declaration is newly-created). |
360 | bool declarationReplaces(NamedDecl *OldD, bool IsKnownNewer = true) const; |
361 | |
362 | /// Determine whether this declaration has linkage. |
363 | bool hasLinkage() const; |
364 | |
365 | using Decl::isModulePrivate; |
366 | using Decl::setModulePrivate; |
367 | |
368 | /// Determine whether this declaration is a C++ class member. |
369 | bool isCXXClassMember() const { |
370 | const DeclContext *DC = getDeclContext(); |
371 | |
372 | // C++0x [class.mem]p1: |
373 | // The enumerators of an unscoped enumeration defined in |
374 | // the class are members of the class. |
375 | if (isa<EnumDecl>(DC)) |
376 | DC = DC->getRedeclContext(); |
377 | |
378 | return DC->isRecord(); |
379 | } |
380 | |
381 | /// Determine whether the given declaration is an instance member of |
382 | /// a C++ class. |
383 | bool isCXXInstanceMember() const; |
384 | |
385 | /// Determine if the declaration obeys the reserved identifier rules of the |
386 | /// given language. |
387 | ReservedIdentifierStatus isReserved(const LangOptions &LangOpts) const; |
388 | |
389 | /// Determine what kind of linkage this entity has. |
390 | /// |
391 | /// This is not the linkage as defined by the standard or the codegen notion |
392 | /// of linkage. It is just an implementation detail that is used to compute |
393 | /// those. |
394 | Linkage getLinkageInternal() const; |
395 | |
396 | /// Get the linkage from a semantic point of view. Entities in |
397 | /// anonymous namespaces are external (in c++98). |
398 | Linkage getFormalLinkage() const { |
399 | return clang::getFormalLinkage(getLinkageInternal()); |
400 | } |
401 | |
402 | /// True if this decl has external linkage. |
403 | bool hasExternalFormalLinkage() const { |
404 | return isExternalFormalLinkage(getLinkageInternal()); |
405 | } |
406 | |
407 | bool isExternallyVisible() const { |
408 | return clang::isExternallyVisible(getLinkageInternal()); |
409 | } |
410 | |
411 | /// Determine whether this declaration can be redeclared in a |
412 | /// different translation unit. |
413 | bool isExternallyDeclarable() const { |
414 | return isExternallyVisible() && !getOwningModuleForLinkage(); |
415 | } |
416 | |
417 | /// Determines the visibility of this entity. |
418 | Visibility getVisibility() const { |
419 | return getLinkageAndVisibility().getVisibility(); |
420 | } |
421 | |
422 | /// Determines the linkage and visibility of this entity. |
423 | LinkageInfo getLinkageAndVisibility() const; |
424 | |
425 | /// Kinds of explicit visibility. |
426 | enum ExplicitVisibilityKind { |
427 | /// Do an LV computation for, ultimately, a type. |
428 | /// Visibility may be restricted by type visibility settings and |
429 | /// the visibility of template arguments. |
430 | VisibilityForType, |
431 | |
432 | /// Do an LV computation for, ultimately, a non-type declaration. |
433 | /// Visibility may be restricted by value visibility settings and |
434 | /// the visibility of template arguments. |
435 | VisibilityForValue |
436 | }; |
437 | |
438 | /// If visibility was explicitly specified for this |
439 | /// declaration, return that visibility. |
440 | Optional<Visibility> |
441 | getExplicitVisibility(ExplicitVisibilityKind kind) const; |
442 | |
443 | /// True if the computed linkage is valid. Used for consistency |
444 | /// checking. Should always return true. |
445 | bool isLinkageValid() const; |
446 | |
447 | /// True if something has required us to compute the linkage |
448 | /// of this declaration. |
449 | /// |
450 | /// Language features which can retroactively change linkage (like a |
451 | /// typedef name for linkage purposes) may need to consider this, |
452 | /// but hopefully only in transitory ways during parsing. |
453 | bool hasLinkageBeenComputed() const { |
454 | return hasCachedLinkage(); |
455 | } |
456 | |
457 | /// Looks through UsingDecls and ObjCCompatibleAliasDecls for |
458 | /// the underlying named decl. |
459 | NamedDecl *getUnderlyingDecl() { |
460 | // Fast-path the common case. |
461 | if (this->getKind() != UsingShadow && |
462 | this->getKind() != ConstructorUsingShadow && |
463 | this->getKind() != ObjCCompatibleAlias && |
464 | this->getKind() != NamespaceAlias) |
465 | return this; |
466 | |
467 | return getUnderlyingDeclImpl(); |
468 | } |
469 | const NamedDecl *getUnderlyingDecl() const { |
470 | return const_cast<NamedDecl*>(this)->getUnderlyingDecl(); |
471 | } |
472 | |
473 | NamedDecl *getMostRecentDecl() { |
474 | return cast<NamedDecl>(static_cast<Decl *>(this)->getMostRecentDecl()); |
475 | } |
476 | const NamedDecl *getMostRecentDecl() const { |
477 | return const_cast<NamedDecl*>(this)->getMostRecentDecl(); |
478 | } |
479 | |
480 | ObjCStringFormatFamily getObjCFStringFormattingFamily() const; |
481 | |
482 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
483 | static bool classofKind(Kind K) { return K >= firstNamed && K <= lastNamed; } |
484 | }; |
485 | |
486 | inline raw_ostream &operator<<(raw_ostream &OS, const NamedDecl &ND) { |
487 | ND.printName(OS); |
488 | return OS; |
489 | } |
490 | |
491 | /// Represents the declaration of a label. Labels also have a |
492 | /// corresponding LabelStmt, which indicates the position that the label was |
493 | /// defined at. For normal labels, the location of the decl is the same as the |
494 | /// location of the statement. For GNU local labels (__label__), the decl |
495 | /// location is where the __label__ is. |
496 | class LabelDecl : public NamedDecl { |
497 | LabelStmt *TheStmt; |
498 | StringRef MSAsmName; |
499 | bool MSAsmNameResolved = false; |
500 | |
501 | /// For normal labels, this is the same as the main declaration |
502 | /// label, i.e., the location of the identifier; for GNU local labels, |
503 | /// this is the location of the __label__ keyword. |
504 | SourceLocation LocStart; |
505 | |
506 | LabelDecl(DeclContext *DC, SourceLocation IdentL, IdentifierInfo *II, |
507 | LabelStmt *S, SourceLocation StartL) |
508 | : NamedDecl(Label, DC, IdentL, II), TheStmt(S), LocStart(StartL) {} |
509 | |
510 | void anchor() override; |
511 | |
512 | public: |
513 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
514 | SourceLocation IdentL, IdentifierInfo *II); |
515 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
516 | SourceLocation IdentL, IdentifierInfo *II, |
517 | SourceLocation GnuLabelL); |
518 | static LabelDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
519 | |
520 | LabelStmt *getStmt() const { return TheStmt; } |
521 | void setStmt(LabelStmt *T) { TheStmt = T; } |
522 | |
523 | bool isGnuLocal() const { return LocStart != getLocation(); } |
524 | void setLocStart(SourceLocation L) { LocStart = L; } |
525 | |
526 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
527 | return SourceRange(LocStart, getLocation()); |
528 | } |
529 | |
530 | bool isMSAsmLabel() const { return !MSAsmName.empty(); } |
531 | bool isResolvedMSAsmLabel() const { return isMSAsmLabel() && MSAsmNameResolved; } |
532 | void setMSAsmLabel(StringRef Name); |
533 | StringRef getMSAsmLabel() const { return MSAsmName; } |
534 | void setMSAsmLabelResolved() { MSAsmNameResolved = true; } |
535 | |
536 | // Implement isa/cast/dyncast/etc. |
537 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
538 | static bool classofKind(Kind K) { return K == Label; } |
539 | }; |
540 | |
541 | /// Represent a C++ namespace. |
542 | class NamespaceDecl : public NamedDecl, public DeclContext, |
543 | public Redeclarable<NamespaceDecl> |
544 | { |
545 | /// The starting location of the source range, pointing |
546 | /// to either the namespace or the inline keyword. |
547 | SourceLocation LocStart; |
548 | |
549 | /// The ending location of the source range. |
550 | SourceLocation RBraceLoc; |
551 | |
552 | /// A pointer to either the anonymous namespace that lives just inside |
553 | /// this namespace or to the first namespace in the chain (the latter case |
554 | /// only when this is not the first in the chain), along with a |
555 | /// boolean value indicating whether this is an inline namespace. |
556 | llvm::PointerIntPair<NamespaceDecl *, 1, bool> AnonOrFirstNamespaceAndInline; |
557 | |
558 | NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline, |
559 | SourceLocation StartLoc, SourceLocation IdLoc, |
560 | IdentifierInfo *Id, NamespaceDecl *PrevDecl); |
561 | |
562 | using redeclarable_base = Redeclarable<NamespaceDecl>; |
563 | |
564 | NamespaceDecl *getNextRedeclarationImpl() override; |
565 | NamespaceDecl *getPreviousDeclImpl() override; |
566 | NamespaceDecl *getMostRecentDeclImpl() override; |
567 | |
568 | public: |
569 | friend class ASTDeclReader; |
570 | friend class ASTDeclWriter; |
571 | |
572 | static NamespaceDecl *Create(ASTContext &C, DeclContext *DC, |
573 | bool Inline, SourceLocation StartLoc, |
574 | SourceLocation IdLoc, IdentifierInfo *Id, |
575 | NamespaceDecl *PrevDecl); |
576 | |
577 | static NamespaceDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
578 | |
579 | using redecl_range = redeclarable_base::redecl_range; |
580 | using redecl_iterator = redeclarable_base::redecl_iterator; |
581 | |
582 | using redeclarable_base::redecls_begin; |
583 | using redeclarable_base::redecls_end; |
584 | using redeclarable_base::redecls; |
585 | using redeclarable_base::getPreviousDecl; |
586 | using redeclarable_base::getMostRecentDecl; |
587 | using redeclarable_base::isFirstDecl; |
588 | |
589 | /// Returns true if this is an anonymous namespace declaration. |
590 | /// |
591 | /// For example: |
592 | /// \code |
593 | /// namespace { |
594 | /// ... |
595 | /// }; |
596 | /// \endcode |
597 | /// q.v. C++ [namespace.unnamed] |
598 | bool isAnonymousNamespace() const { |
599 | return !getIdentifier(); |
600 | } |
601 | |
602 | /// Returns true if this is an inline namespace declaration. |
603 | bool isInline() const { |
604 | return AnonOrFirstNamespaceAndInline.getInt(); |
605 | } |
606 | |
607 | /// Set whether this is an inline namespace declaration. |
608 | void setInline(bool Inline) { |
609 | AnonOrFirstNamespaceAndInline.setInt(Inline); |
610 | } |
611 | |
612 | /// Returns true if the inline qualifier for \c Name is redundant. |
613 | bool isRedundantInlineQualifierFor(DeclarationName Name) const { |
614 | if (!isInline()) |
615 | return false; |
616 | auto X = lookup(Name); |
617 | // We should not perform a lookup within a transparent context, so find a |
618 | // non-transparent parent context. |
619 | auto Y = getParent()->getNonTransparentContext()->lookup(Name); |
620 | return std::distance(X.begin(), X.end()) == |
621 | std::distance(Y.begin(), Y.end()); |
622 | } |
623 | |
624 | /// Get the original (first) namespace declaration. |
625 | NamespaceDecl *getOriginalNamespace(); |
626 | |
627 | /// Get the original (first) namespace declaration. |
628 | const NamespaceDecl *getOriginalNamespace() const; |
629 | |
630 | /// Return true if this declaration is an original (first) declaration |
631 | /// of the namespace. This is false for non-original (subsequent) namespace |
632 | /// declarations and anonymous namespaces. |
633 | bool isOriginalNamespace() const; |
634 | |
635 | /// Retrieve the anonymous namespace nested inside this namespace, |
636 | /// if any. |
637 | NamespaceDecl *getAnonymousNamespace() const { |
638 | return getOriginalNamespace()->AnonOrFirstNamespaceAndInline.getPointer(); |
639 | } |
640 | |
641 | void setAnonymousNamespace(NamespaceDecl *D) { |
642 | getOriginalNamespace()->AnonOrFirstNamespaceAndInline.setPointer(D); |
643 | } |
644 | |
645 | /// Retrieves the canonical declaration of this namespace. |
646 | NamespaceDecl *getCanonicalDecl() override { |
647 | return getOriginalNamespace(); |
648 | } |
649 | const NamespaceDecl *getCanonicalDecl() const { |
650 | return getOriginalNamespace(); |
651 | } |
652 | |
653 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
654 | return SourceRange(LocStart, RBraceLoc); |
655 | } |
656 | |
657 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LocStart; } |
658 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
659 | void setLocStart(SourceLocation L) { LocStart = L; } |
660 | void setRBraceLoc(SourceLocation L) { RBraceLoc = L; } |
661 | |
662 | // Implement isa/cast/dyncast/etc. |
663 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
664 | static bool classofKind(Kind K) { return K == Namespace; } |
665 | static DeclContext *castToDeclContext(const NamespaceDecl *D) { |
666 | return static_cast<DeclContext *>(const_cast<NamespaceDecl*>(D)); |
667 | } |
668 | static NamespaceDecl *castFromDeclContext(const DeclContext *DC) { |
669 | return static_cast<NamespaceDecl *>(const_cast<DeclContext*>(DC)); |
670 | } |
671 | }; |
672 | |
673 | /// Represent the declaration of a variable (in which case it is |
674 | /// an lvalue) a function (in which case it is a function designator) or |
675 | /// an enum constant. |
676 | class ValueDecl : public NamedDecl { |
677 | QualType DeclType; |
678 | |
679 | void anchor() override; |
680 | |
681 | protected: |
682 | ValueDecl(Kind DK, DeclContext *DC, SourceLocation L, |
683 | DeclarationName N, QualType T) |
684 | : NamedDecl(DK, DC, L, N), DeclType(T) {} |
685 | |
686 | public: |
687 | QualType getType() const { return DeclType; } |
688 | void setType(QualType newType) { DeclType = newType; } |
689 | |
690 | /// Determine whether this symbol is weakly-imported, |
691 | /// or declared with the weak or weak-ref attr. |
692 | bool isWeak() const; |
693 | |
694 | // Implement isa/cast/dyncast/etc. |
695 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
696 | static bool classofKind(Kind K) { return K >= firstValue && K <= lastValue; } |
697 | }; |
698 | |
699 | /// A struct with extended info about a syntactic |
700 | /// name qualifier, to be used for the case of out-of-line declarations. |
701 | struct QualifierInfo { |
702 | NestedNameSpecifierLoc QualifierLoc; |
703 | |
704 | /// The number of "outer" template parameter lists. |
705 | /// The count includes all of the template parameter lists that were matched |
706 | /// against the template-ids occurring into the NNS and possibly (in the |
707 | /// case of an explicit specialization) a final "template <>". |
708 | unsigned NumTemplParamLists = 0; |
709 | |
710 | /// A new-allocated array of size NumTemplParamLists, |
711 | /// containing pointers to the "outer" template parameter lists. |
712 | /// It includes all of the template parameter lists that were matched |
713 | /// against the template-ids occurring into the NNS and possibly (in the |
714 | /// case of an explicit specialization) a final "template <>". |
715 | TemplateParameterList** TemplParamLists = nullptr; |
716 | |
717 | QualifierInfo() = default; |
718 | QualifierInfo(const QualifierInfo &) = delete; |
719 | QualifierInfo& operator=(const QualifierInfo &) = delete; |
720 | |
721 | /// Sets info about "outer" template parameter lists. |
722 | void setTemplateParameterListsInfo(ASTContext &Context, |
723 | ArrayRef<TemplateParameterList *> TPLists); |
724 | }; |
725 | |
726 | /// Represents a ValueDecl that came out of a declarator. |
727 | /// Contains type source information through TypeSourceInfo. |
728 | class DeclaratorDecl : public ValueDecl { |
729 | // A struct representing a TInfo, a trailing requires-clause and a syntactic |
730 | // qualifier, to be used for the (uncommon) case of out-of-line declarations |
731 | // and constrained function decls. |
732 | struct ExtInfo : public QualifierInfo { |
733 | TypeSourceInfo *TInfo; |
734 | Expr *TrailingRequiresClause = nullptr; |
735 | }; |
736 | |
737 | llvm::PointerUnion<TypeSourceInfo *, ExtInfo *> DeclInfo; |
738 | |
739 | /// The start of the source range for this declaration, |
740 | /// ignoring outer template declarations. |
741 | SourceLocation InnerLocStart; |
742 | |
743 | bool hasExtInfo() const { return DeclInfo.is<ExtInfo*>(); } |
744 | ExtInfo *getExtInfo() { return DeclInfo.get<ExtInfo*>(); } |
745 | const ExtInfo *getExtInfo() const { return DeclInfo.get<ExtInfo*>(); } |
746 | |
747 | protected: |
748 | DeclaratorDecl(Kind DK, DeclContext *DC, SourceLocation L, |
749 | DeclarationName N, QualType T, TypeSourceInfo *TInfo, |
750 | SourceLocation StartL) |
751 | : ValueDecl(DK, DC, L, N, T), DeclInfo(TInfo), InnerLocStart(StartL) {} |
752 | |
753 | public: |
754 | friend class ASTDeclReader; |
755 | friend class ASTDeclWriter; |
756 | |
757 | TypeSourceInfo *getTypeSourceInfo() const { |
758 | return hasExtInfo() |
759 | ? getExtInfo()->TInfo |
760 | : DeclInfo.get<TypeSourceInfo*>(); |
761 | } |
762 | |
763 | void setTypeSourceInfo(TypeSourceInfo *TI) { |
764 | if (hasExtInfo()) |
765 | getExtInfo()->TInfo = TI; |
766 | else |
767 | DeclInfo = TI; |
768 | } |
769 | |
770 | /// Return start of source range ignoring outer template declarations. |
771 | SourceLocation getInnerLocStart() const { return InnerLocStart; } |
772 | void setInnerLocStart(SourceLocation L) { InnerLocStart = L; } |
773 | |
774 | /// Return start of source range taking into account any outer template |
775 | /// declarations. |
776 | SourceLocation getOuterLocStart() const; |
777 | |
778 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
779 | |
780 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
781 | return getOuterLocStart(); |
782 | } |
783 | |
784 | /// Retrieve the nested-name-specifier that qualifies the name of this |
785 | /// declaration, if it was present in the source. |
786 | NestedNameSpecifier *getQualifier() const { |
787 | return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier() |
788 | : nullptr; |
789 | } |
790 | |
791 | /// Retrieve the nested-name-specifier (with source-location |
792 | /// information) that qualifies the name of this declaration, if it was |
793 | /// present in the source. |
794 | NestedNameSpecifierLoc getQualifierLoc() const { |
795 | return hasExtInfo() ? getExtInfo()->QualifierLoc |
796 | : NestedNameSpecifierLoc(); |
797 | } |
798 | |
799 | void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc); |
800 | |
801 | /// \brief Get the constraint-expression introduced by the trailing |
802 | /// requires-clause in the function/member declaration, or null if no |
803 | /// requires-clause was provided. |
804 | Expr *getTrailingRequiresClause() { |
805 | return hasExtInfo() ? getExtInfo()->TrailingRequiresClause |
806 | : nullptr; |
807 | } |
808 | |
809 | const Expr *getTrailingRequiresClause() const { |
810 | return hasExtInfo() ? getExtInfo()->TrailingRequiresClause |
811 | : nullptr; |
812 | } |
813 | |
814 | void setTrailingRequiresClause(Expr *TrailingRequiresClause); |
815 | |
816 | unsigned getNumTemplateParameterLists() const { |
817 | return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0; |
818 | } |
819 | |
820 | TemplateParameterList *getTemplateParameterList(unsigned index) const { |
821 | assert(index < getNumTemplateParameterLists())(static_cast <bool> (index < getNumTemplateParameterLists ()) ? void (0) : __assert_fail ("index < getNumTemplateParameterLists()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 821, __extension__ __PRETTY_FUNCTION__)); |
822 | return getExtInfo()->TemplParamLists[index]; |
823 | } |
824 | |
825 | void setTemplateParameterListsInfo(ASTContext &Context, |
826 | ArrayRef<TemplateParameterList *> TPLists); |
827 | |
828 | SourceLocation getTypeSpecStartLoc() const; |
829 | SourceLocation getTypeSpecEndLoc() const; |
830 | |
831 | // Implement isa/cast/dyncast/etc. |
832 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
833 | static bool classofKind(Kind K) { |
834 | return K >= firstDeclarator && K <= lastDeclarator; |
835 | } |
836 | }; |
837 | |
838 | /// Structure used to store a statement, the constant value to |
839 | /// which it was evaluated (if any), and whether or not the statement |
840 | /// is an integral constant expression (if known). |
841 | struct EvaluatedStmt { |
842 | /// Whether this statement was already evaluated. |
843 | bool WasEvaluated : 1; |
844 | |
845 | /// Whether this statement is being evaluated. |
846 | bool IsEvaluating : 1; |
847 | |
848 | /// Whether this variable is known to have constant initialization. This is |
849 | /// currently only computed in C++, for static / thread storage duration |
850 | /// variables that might have constant initialization and for variables that |
851 | /// are usable in constant expressions. |
852 | bool HasConstantInitialization : 1; |
853 | |
854 | /// Whether this variable is known to have constant destruction. That is, |
855 | /// whether running the destructor on the initial value is a side-effect |
856 | /// (and doesn't inspect any state that might have changed during program |
857 | /// execution). This is currently only computed if the destructor is |
858 | /// non-trivial. |
859 | bool HasConstantDestruction : 1; |
860 | |
861 | /// In C++98, whether the initializer is an ICE. This affects whether the |
862 | /// variable is usable in constant expressions. |
863 | bool HasICEInit : 1; |
864 | bool CheckedForICEInit : 1; |
865 | |
866 | Stmt *Value; |
867 | APValue Evaluated; |
868 | |
869 | EvaluatedStmt() |
870 | : WasEvaluated(false), IsEvaluating(false), |
871 | HasConstantInitialization(false), HasConstantDestruction(false), |
872 | HasICEInit(false), CheckedForICEInit(false) {} |
873 | }; |
874 | |
875 | /// Represents a variable declaration or definition. |
876 | class VarDecl : public DeclaratorDecl, public Redeclarable<VarDecl> { |
877 | public: |
878 | /// Initialization styles. |
879 | enum InitializationStyle { |
880 | /// C-style initialization with assignment |
881 | CInit, |
882 | |
883 | /// Call-style initialization (C++98) |
884 | CallInit, |
885 | |
886 | /// Direct list-initialization (C++11) |
887 | ListInit |
888 | }; |
889 | |
890 | /// Kinds of thread-local storage. |
891 | enum TLSKind { |
892 | /// Not a TLS variable. |
893 | TLS_None, |
894 | |
895 | /// TLS with a known-constant initializer. |
896 | TLS_Static, |
897 | |
898 | /// TLS with a dynamic initializer. |
899 | TLS_Dynamic |
900 | }; |
901 | |
902 | /// Return the string used to specify the storage class \p SC. |
903 | /// |
904 | /// It is illegal to call this function with SC == None. |
905 | static const char *getStorageClassSpecifierString(StorageClass SC); |
906 | |
907 | protected: |
908 | // A pointer union of Stmt * and EvaluatedStmt *. When an EvaluatedStmt, we |
909 | // have allocated the auxiliary struct of information there. |
910 | // |
911 | // TODO: It is a bit unfortunate to use a PointerUnion inside the VarDecl for |
912 | // this as *many* VarDecls are ParmVarDecls that don't have default |
913 | // arguments. We could save some space by moving this pointer union to be |
914 | // allocated in trailing space when necessary. |
915 | using InitType = llvm::PointerUnion<Stmt *, EvaluatedStmt *>; |
916 | |
917 | /// The initializer for this variable or, for a ParmVarDecl, the |
918 | /// C++ default argument. |
919 | mutable InitType Init; |
920 | |
921 | private: |
922 | friend class ASTDeclReader; |
923 | friend class ASTNodeImporter; |
924 | friend class StmtIteratorBase; |
925 | |
926 | class VarDeclBitfields { |
927 | friend class ASTDeclReader; |
928 | friend class VarDecl; |
929 | |
930 | unsigned SClass : 3; |
931 | unsigned TSCSpec : 2; |
932 | unsigned InitStyle : 2; |
933 | |
934 | /// Whether this variable is an ARC pseudo-__strong variable; see |
935 | /// isARCPseudoStrong() for details. |
936 | unsigned ARCPseudoStrong : 1; |
937 | }; |
938 | enum { NumVarDeclBits = 8 }; |
939 | |
940 | protected: |
941 | enum { NumParameterIndexBits = 8 }; |
942 | |
943 | enum DefaultArgKind { |
944 | DAK_None, |
945 | DAK_Unparsed, |
946 | DAK_Uninstantiated, |
947 | DAK_Normal |
948 | }; |
949 | |
950 | enum { NumScopeDepthOrObjCQualsBits = 7 }; |
951 | |
952 | class ParmVarDeclBitfields { |
953 | friend class ASTDeclReader; |
954 | friend class ParmVarDecl; |
955 | |
956 | unsigned : NumVarDeclBits; |
957 | |
958 | /// Whether this parameter inherits a default argument from a |
959 | /// prior declaration. |
960 | unsigned HasInheritedDefaultArg : 1; |
961 | |
962 | /// Describes the kind of default argument for this parameter. By default |
963 | /// this is none. If this is normal, then the default argument is stored in |
964 | /// the \c VarDecl initializer expression unless we were unable to parse |
965 | /// (even an invalid) expression for the default argument. |
966 | unsigned DefaultArgKind : 2; |
967 | |
968 | /// Whether this parameter undergoes K&R argument promotion. |
969 | unsigned IsKNRPromoted : 1; |
970 | |
971 | /// Whether this parameter is an ObjC method parameter or not. |
972 | unsigned IsObjCMethodParam : 1; |
973 | |
974 | /// If IsObjCMethodParam, a Decl::ObjCDeclQualifier. |
975 | /// Otherwise, the number of function parameter scopes enclosing |
976 | /// the function parameter scope in which this parameter was |
977 | /// declared. |
978 | unsigned ScopeDepthOrObjCQuals : NumScopeDepthOrObjCQualsBits; |
979 | |
980 | /// The number of parameters preceding this parameter in the |
981 | /// function parameter scope in which it was declared. |
982 | unsigned ParameterIndex : NumParameterIndexBits; |
983 | }; |
984 | |
985 | class NonParmVarDeclBitfields { |
986 | friend class ASTDeclReader; |
987 | friend class ImplicitParamDecl; |
988 | friend class VarDecl; |
989 | |
990 | unsigned : NumVarDeclBits; |
991 | |
992 | // FIXME: We need something similar to CXXRecordDecl::DefinitionData. |
993 | /// Whether this variable is a definition which was demoted due to |
994 | /// module merge. |
995 | unsigned IsThisDeclarationADemotedDefinition : 1; |
996 | |
997 | /// Whether this variable is the exception variable in a C++ catch |
998 | /// or an Objective-C @catch statement. |
999 | unsigned ExceptionVar : 1; |
1000 | |
1001 | /// Whether this local variable could be allocated in the return |
1002 | /// slot of its function, enabling the named return value optimization |
1003 | /// (NRVO). |
1004 | unsigned NRVOVariable : 1; |
1005 | |
1006 | /// Whether this variable is the for-range-declaration in a C++0x |
1007 | /// for-range statement. |
1008 | unsigned CXXForRangeDecl : 1; |
1009 | |
1010 | /// Whether this variable is the for-in loop declaration in Objective-C. |
1011 | unsigned ObjCForDecl : 1; |
1012 | |
1013 | /// Whether this variable is (C++1z) inline. |
1014 | unsigned IsInline : 1; |
1015 | |
1016 | /// Whether this variable has (C++1z) inline explicitly specified. |
1017 | unsigned IsInlineSpecified : 1; |
1018 | |
1019 | /// Whether this variable is (C++0x) constexpr. |
1020 | unsigned IsConstexpr : 1; |
1021 | |
1022 | /// Whether this variable is the implicit variable for a lambda |
1023 | /// init-capture. |
1024 | unsigned IsInitCapture : 1; |
1025 | |
1026 | /// Whether this local extern variable's previous declaration was |
1027 | /// declared in the same block scope. This controls whether we should merge |
1028 | /// the type of this declaration with its previous declaration. |
1029 | unsigned PreviousDeclInSameBlockScope : 1; |
1030 | |
1031 | /// Defines kind of the ImplicitParamDecl: 'this', 'self', 'vtt', '_cmd' or |
1032 | /// something else. |
1033 | unsigned ImplicitParamKind : 3; |
1034 | |
1035 | unsigned EscapingByref : 1; |
1036 | }; |
1037 | |
1038 | union { |
1039 | unsigned AllBits; |
1040 | VarDeclBitfields VarDeclBits; |
1041 | ParmVarDeclBitfields ParmVarDeclBits; |
1042 | NonParmVarDeclBitfields NonParmVarDeclBits; |
1043 | }; |
1044 | |
1045 | VarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1046 | SourceLocation IdLoc, IdentifierInfo *Id, QualType T, |
1047 | TypeSourceInfo *TInfo, StorageClass SC); |
1048 | |
1049 | using redeclarable_base = Redeclarable<VarDecl>; |
1050 | |
1051 | VarDecl *getNextRedeclarationImpl() override { |
1052 | return getNextRedeclaration(); |
1053 | } |
1054 | |
1055 | VarDecl *getPreviousDeclImpl() override { |
1056 | return getPreviousDecl(); |
1057 | } |
1058 | |
1059 | VarDecl *getMostRecentDeclImpl() override { |
1060 | return getMostRecentDecl(); |
1061 | } |
1062 | |
1063 | public: |
1064 | using redecl_range = redeclarable_base::redecl_range; |
1065 | using redecl_iterator = redeclarable_base::redecl_iterator; |
1066 | |
1067 | using redeclarable_base::redecls_begin; |
1068 | using redeclarable_base::redecls_end; |
1069 | using redeclarable_base::redecls; |
1070 | using redeclarable_base::getPreviousDecl; |
1071 | using redeclarable_base::getMostRecentDecl; |
1072 | using redeclarable_base::isFirstDecl; |
1073 | |
1074 | static VarDecl *Create(ASTContext &C, DeclContext *DC, |
1075 | SourceLocation StartLoc, SourceLocation IdLoc, |
1076 | IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, |
1077 | StorageClass S); |
1078 | |
1079 | static VarDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1080 | |
1081 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1082 | |
1083 | /// Returns the storage class as written in the source. For the |
1084 | /// computed linkage of symbol, see getLinkage. |
1085 | StorageClass getStorageClass() const { |
1086 | return (StorageClass) VarDeclBits.SClass; |
1087 | } |
1088 | void setStorageClass(StorageClass SC); |
1089 | |
1090 | void setTSCSpec(ThreadStorageClassSpecifier TSC) { |
1091 | VarDeclBits.TSCSpec = TSC; |
1092 | assert(VarDeclBits.TSCSpec == TSC && "truncation")(static_cast <bool> (VarDeclBits.TSCSpec == TSC && "truncation") ? void (0) : __assert_fail ("VarDeclBits.TSCSpec == TSC && \"truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1092, __extension__ __PRETTY_FUNCTION__)); |
1093 | } |
1094 | ThreadStorageClassSpecifier getTSCSpec() const { |
1095 | return static_cast<ThreadStorageClassSpecifier>(VarDeclBits.TSCSpec); |
1096 | } |
1097 | TLSKind getTLSKind() const; |
1098 | |
1099 | /// Returns true if a variable with function scope is a non-static local |
1100 | /// variable. |
1101 | bool hasLocalStorage() const { |
1102 | if (getStorageClass() == SC_None) { |
1103 | // OpenCL v1.2 s6.5.3: The __constant or constant address space name is |
1104 | // used to describe variables allocated in global memory and which are |
1105 | // accessed inside a kernel(s) as read-only variables. As such, variables |
1106 | // in constant address space cannot have local storage. |
1107 | if (getType().getAddressSpace() == LangAS::opencl_constant) |
1108 | return false; |
1109 | // Second check is for C++11 [dcl.stc]p4. |
1110 | return !isFileVarDecl() && getTSCSpec() == TSCS_unspecified; |
1111 | } |
1112 | |
1113 | // Global Named Register (GNU extension) |
1114 | if (getStorageClass() == SC_Register && !isLocalVarDeclOrParm()) |
1115 | return false; |
1116 | |
1117 | // Return true for: Auto, Register. |
1118 | // Return false for: Extern, Static, PrivateExtern, OpenCLWorkGroupLocal. |
1119 | |
1120 | return getStorageClass() >= SC_Auto; |
1121 | } |
1122 | |
1123 | /// Returns true if a variable with function scope is a static local |
1124 | /// variable. |
1125 | bool isStaticLocal() const { |
1126 | return (getStorageClass() == SC_Static || |
1127 | // C++11 [dcl.stc]p4 |
1128 | (getStorageClass() == SC_None && getTSCSpec() == TSCS_thread_local)) |
1129 | && !isFileVarDecl(); |
1130 | } |
1131 | |
1132 | /// Returns true if a variable has extern or __private_extern__ |
1133 | /// storage. |
1134 | bool hasExternalStorage() const { |
1135 | return getStorageClass() == SC_Extern || |
1136 | getStorageClass() == SC_PrivateExtern; |
1137 | } |
1138 | |
1139 | /// Returns true for all variables that do not have local storage. |
1140 | /// |
1141 | /// This includes all global variables as well as static variables declared |
1142 | /// within a function. |
1143 | bool hasGlobalStorage() const { return !hasLocalStorage(); } |
1144 | |
1145 | /// Get the storage duration of this variable, per C++ [basic.stc]. |
1146 | StorageDuration getStorageDuration() const { |
1147 | return hasLocalStorage() ? SD_Automatic : |
1148 | getTSCSpec() ? SD_Thread : SD_Static; |
1149 | } |
1150 | |
1151 | /// Compute the language linkage. |
1152 | LanguageLinkage getLanguageLinkage() const; |
1153 | |
1154 | /// Determines whether this variable is a variable with external, C linkage. |
1155 | bool isExternC() const; |
1156 | |
1157 | /// Determines whether this variable's context is, or is nested within, |
1158 | /// a C++ extern "C" linkage spec. |
1159 | bool isInExternCContext() const; |
1160 | |
1161 | /// Determines whether this variable's context is, or is nested within, |
1162 | /// a C++ extern "C++" linkage spec. |
1163 | bool isInExternCXXContext() const; |
1164 | |
1165 | /// Returns true for local variable declarations other than parameters. |
1166 | /// Note that this includes static variables inside of functions. It also |
1167 | /// includes variables inside blocks. |
1168 | /// |
1169 | /// void foo() { int x; static int y; extern int z; } |
1170 | bool isLocalVarDecl() const { |
1171 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1172 | return false; |
1173 | if (const DeclContext *DC = getLexicalDeclContext()) |
1174 | return DC->getRedeclContext()->isFunctionOrMethod(); |
1175 | return false; |
1176 | } |
1177 | |
1178 | /// Similar to isLocalVarDecl but also includes parameters. |
1179 | bool isLocalVarDeclOrParm() const { |
1180 | return isLocalVarDecl() || getKind() == Decl::ParmVar; |
1181 | } |
1182 | |
1183 | /// Similar to isLocalVarDecl, but excludes variables declared in blocks. |
1184 | bool isFunctionOrMethodVarDecl() const { |
1185 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1186 | return false; |
1187 | const DeclContext *DC = getLexicalDeclContext()->getRedeclContext(); |
1188 | return DC->isFunctionOrMethod() && DC->getDeclKind() != Decl::Block; |
1189 | } |
1190 | |
1191 | /// Determines whether this is a static data member. |
1192 | /// |
1193 | /// This will only be true in C++, and applies to, e.g., the |
1194 | /// variable 'x' in: |
1195 | /// \code |
1196 | /// struct S { |
1197 | /// static int x; |
1198 | /// }; |
1199 | /// \endcode |
1200 | bool isStaticDataMember() const { |
1201 | // If it wasn't static, it would be a FieldDecl. |
1202 | return getKind() != Decl::ParmVar && getDeclContext()->isRecord(); |
1203 | } |
1204 | |
1205 | VarDecl *getCanonicalDecl() override; |
1206 | const VarDecl *getCanonicalDecl() const { |
1207 | return const_cast<VarDecl*>(this)->getCanonicalDecl(); |
1208 | } |
1209 | |
1210 | enum DefinitionKind { |
1211 | /// This declaration is only a declaration. |
1212 | DeclarationOnly, |
1213 | |
1214 | /// This declaration is a tentative definition. |
1215 | TentativeDefinition, |
1216 | |
1217 | /// This declaration is definitely a definition. |
1218 | Definition |
1219 | }; |
1220 | |
1221 | /// Check whether this declaration is a definition. If this could be |
1222 | /// a tentative definition (in C), don't check whether there's an overriding |
1223 | /// definition. |
1224 | DefinitionKind isThisDeclarationADefinition(ASTContext &) const; |
1225 | DefinitionKind isThisDeclarationADefinition() const { |
1226 | return isThisDeclarationADefinition(getASTContext()); |
1227 | } |
1228 | |
1229 | /// Check whether this variable is defined in this translation unit. |
1230 | DefinitionKind hasDefinition(ASTContext &) const; |
1231 | DefinitionKind hasDefinition() const { |
1232 | return hasDefinition(getASTContext()); |
1233 | } |
1234 | |
1235 | /// Get the tentative definition that acts as the real definition in a TU. |
1236 | /// Returns null if there is a proper definition available. |
1237 | VarDecl *getActingDefinition(); |
1238 | const VarDecl *getActingDefinition() const { |
1239 | return const_cast<VarDecl*>(this)->getActingDefinition(); |
1240 | } |
1241 | |
1242 | /// Get the real (not just tentative) definition for this declaration. |
1243 | VarDecl *getDefinition(ASTContext &); |
1244 | const VarDecl *getDefinition(ASTContext &C) const { |
1245 | return const_cast<VarDecl*>(this)->getDefinition(C); |
1246 | } |
1247 | VarDecl *getDefinition() { |
1248 | return getDefinition(getASTContext()); |
1249 | } |
1250 | const VarDecl *getDefinition() const { |
1251 | return const_cast<VarDecl*>(this)->getDefinition(); |
1252 | } |
1253 | |
1254 | /// Determine whether this is or was instantiated from an out-of-line |
1255 | /// definition of a static data member. |
1256 | bool isOutOfLine() const override; |
1257 | |
1258 | /// Returns true for file scoped variable declaration. |
1259 | bool isFileVarDecl() const { |
1260 | Kind K = getKind(); |
1261 | if (K == ParmVar || K == ImplicitParam) |
1262 | return false; |
1263 | |
1264 | if (getLexicalDeclContext()->getRedeclContext()->isFileContext()) |
1265 | return true; |
1266 | |
1267 | if (isStaticDataMember()) |
1268 | return true; |
1269 | |
1270 | return false; |
1271 | } |
1272 | |
1273 | /// Get the initializer for this variable, no matter which |
1274 | /// declaration it is attached to. |
1275 | const Expr *getAnyInitializer() const { |
1276 | const VarDecl *D; |
1277 | return getAnyInitializer(D); |
1278 | } |
1279 | |
1280 | /// Get the initializer for this variable, no matter which |
1281 | /// declaration it is attached to. Also get that declaration. |
1282 | const Expr *getAnyInitializer(const VarDecl *&D) const; |
1283 | |
1284 | bool hasInit() const; |
1285 | const Expr *getInit() const { |
1286 | return const_cast<VarDecl *>(this)->getInit(); |
1287 | } |
1288 | Expr *getInit(); |
1289 | |
1290 | /// Retrieve the address of the initializer expression. |
1291 | Stmt **getInitAddress(); |
1292 | |
1293 | void setInit(Expr *I); |
1294 | |
1295 | /// Get the initializing declaration of this variable, if any. This is |
1296 | /// usually the definition, except that for a static data member it can be |
1297 | /// the in-class declaration. |
1298 | VarDecl *getInitializingDeclaration(); |
1299 | const VarDecl *getInitializingDeclaration() const { |
1300 | return const_cast<VarDecl *>(this)->getInitializingDeclaration(); |
1301 | } |
1302 | |
1303 | /// Determine whether this variable's value might be usable in a |
1304 | /// constant expression, according to the relevant language standard. |
1305 | /// This only checks properties of the declaration, and does not check |
1306 | /// whether the initializer is in fact a constant expression. |
1307 | /// |
1308 | /// This corresponds to C++20 [expr.const]p3's notion of a |
1309 | /// "potentially-constant" variable. |
1310 | bool mightBeUsableInConstantExpressions(const ASTContext &C) const; |
1311 | |
1312 | /// Determine whether this variable's value can be used in a |
1313 | /// constant expression, according to the relevant language standard, |
1314 | /// including checking whether it was initialized by a constant expression. |
1315 | bool isUsableInConstantExpressions(const ASTContext &C) const; |
1316 | |
1317 | EvaluatedStmt *ensureEvaluatedStmt() const; |
1318 | EvaluatedStmt *getEvaluatedStmt() const; |
1319 | |
1320 | /// Attempt to evaluate the value of the initializer attached to this |
1321 | /// declaration, and produce notes explaining why it cannot be evaluated. |
1322 | /// Returns a pointer to the value if evaluation succeeded, 0 otherwise. |
1323 | APValue *evaluateValue() const; |
1324 | |
1325 | private: |
1326 | APValue *evaluateValueImpl(SmallVectorImpl<PartialDiagnosticAt> &Notes, |
1327 | bool IsConstantInitialization) const; |
1328 | |
1329 | public: |
1330 | /// Return the already-evaluated value of this variable's |
1331 | /// initializer, or NULL if the value is not yet known. Returns pointer |
1332 | /// to untyped APValue if the value could not be evaluated. |
1333 | APValue *getEvaluatedValue() const; |
1334 | |
1335 | /// Evaluate the destruction of this variable to determine if it constitutes |
1336 | /// constant destruction. |
1337 | /// |
1338 | /// \pre hasConstantInitialization() |
1339 | /// \return \c true if this variable has constant destruction, \c false if |
1340 | /// not. |
1341 | bool evaluateDestruction(SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1342 | |
1343 | /// Determine whether this variable has constant initialization. |
1344 | /// |
1345 | /// This is only set in two cases: when the language semantics require |
1346 | /// constant initialization (globals in C and some globals in C++), and when |
1347 | /// the variable is usable in constant expressions (constexpr, const int, and |
1348 | /// reference variables in C++). |
1349 | bool hasConstantInitialization() const; |
1350 | |
1351 | /// Determine whether the initializer of this variable is an integer constant |
1352 | /// expression. For use in C++98, where this affects whether the variable is |
1353 | /// usable in constant expressions. |
1354 | bool hasICEInitializer(const ASTContext &Context) const; |
1355 | |
1356 | /// Evaluate the initializer of this variable to determine whether it's a |
1357 | /// constant initializer. Should only be called once, after completing the |
1358 | /// definition of the variable. |
1359 | bool checkForConstantInitialization( |
1360 | SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1361 | |
1362 | void setInitStyle(InitializationStyle Style) { |
1363 | VarDeclBits.InitStyle = Style; |
1364 | } |
1365 | |
1366 | /// The style of initialization for this declaration. |
1367 | /// |
1368 | /// C-style initialization is "int x = 1;". Call-style initialization is |
1369 | /// a C++98 direct-initializer, e.g. "int x(1);". The Init expression will be |
1370 | /// the expression inside the parens or a "ClassType(a,b,c)" class constructor |
1371 | /// expression for class types. List-style initialization is C++11 syntax, |
1372 | /// e.g. "int x{1};". Clients can distinguish between different forms of |
1373 | /// initialization by checking this value. In particular, "int x = {1};" is |
1374 | /// C-style, "int x({1})" is call-style, and "int x{1};" is list-style; the |
1375 | /// Init expression in all three cases is an InitListExpr. |
1376 | InitializationStyle getInitStyle() const { |
1377 | return static_cast<InitializationStyle>(VarDeclBits.InitStyle); |
1378 | } |
1379 | |
1380 | /// Whether the initializer is a direct-initializer (list or call). |
1381 | bool isDirectInit() const { |
1382 | return getInitStyle() != CInit; |
1383 | } |
1384 | |
1385 | /// If this definition should pretend to be a declaration. |
1386 | bool isThisDeclarationADemotedDefinition() const { |
1387 | return isa<ParmVarDecl>(this) ? false : |
1388 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition; |
1389 | } |
1390 | |
1391 | /// This is a definition which should be demoted to a declaration. |
1392 | /// |
1393 | /// In some cases (mostly module merging) we can end up with two visible |
1394 | /// definitions one of which needs to be demoted to a declaration to keep |
1395 | /// the AST invariants. |
1396 | void demoteThisDefinitionToDeclaration() { |
1397 | assert(isThisDeclarationADefinition() && "Not a definition!")(static_cast <bool> (isThisDeclarationADefinition() && "Not a definition!") ? void (0) : __assert_fail ("isThisDeclarationADefinition() && \"Not a definition!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1397, __extension__ __PRETTY_FUNCTION__)); |
1398 | assert(!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!")(static_cast <bool> (!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!") ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this) && \"Cannot demote ParmVarDecls!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1398, __extension__ __PRETTY_FUNCTION__)); |
1399 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition = 1; |
1400 | } |
1401 | |
1402 | /// Determine whether this variable is the exception variable in a |
1403 | /// C++ catch statememt or an Objective-C \@catch statement. |
1404 | bool isExceptionVariable() const { |
1405 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.ExceptionVar; |
1406 | } |
1407 | void setExceptionVariable(bool EV) { |
1408 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1408, __extension__ __PRETTY_FUNCTION__)); |
1409 | NonParmVarDeclBits.ExceptionVar = EV; |
1410 | } |
1411 | |
1412 | /// Determine whether this local variable can be used with the named |
1413 | /// return value optimization (NRVO). |
1414 | /// |
1415 | /// The named return value optimization (NRVO) works by marking certain |
1416 | /// non-volatile local variables of class type as NRVO objects. These |
1417 | /// locals can be allocated within the return slot of their containing |
1418 | /// function, in which case there is no need to copy the object to the |
1419 | /// return slot when returning from the function. Within the function body, |
1420 | /// each return that returns the NRVO object will have this variable as its |
1421 | /// NRVO candidate. |
1422 | bool isNRVOVariable() const { |
1423 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.NRVOVariable; |
1424 | } |
1425 | void setNRVOVariable(bool NRVO) { |
1426 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1426, __extension__ __PRETTY_FUNCTION__)); |
1427 | NonParmVarDeclBits.NRVOVariable = NRVO; |
1428 | } |
1429 | |
1430 | /// Determine whether this variable is the for-range-declaration in |
1431 | /// a C++0x for-range statement. |
1432 | bool isCXXForRangeDecl() const { |
1433 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.CXXForRangeDecl; |
1434 | } |
1435 | void setCXXForRangeDecl(bool FRD) { |
1436 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1436, __extension__ __PRETTY_FUNCTION__)); |
1437 | NonParmVarDeclBits.CXXForRangeDecl = FRD; |
1438 | } |
1439 | |
1440 | /// Determine whether this variable is a for-loop declaration for a |
1441 | /// for-in statement in Objective-C. |
1442 | bool isObjCForDecl() const { |
1443 | return NonParmVarDeclBits.ObjCForDecl; |
1444 | } |
1445 | |
1446 | void setObjCForDecl(bool FRD) { |
1447 | NonParmVarDeclBits.ObjCForDecl = FRD; |
1448 | } |
1449 | |
1450 | /// Determine whether this variable is an ARC pseudo-__strong variable. A |
1451 | /// pseudo-__strong variable has a __strong-qualified type but does not |
1452 | /// actually retain the object written into it. Generally such variables are |
1453 | /// also 'const' for safety. There are 3 cases where this will be set, 1) if |
1454 | /// the variable is annotated with the objc_externally_retained attribute, 2) |
1455 | /// if its 'self' in a non-init method, or 3) if its the variable in an for-in |
1456 | /// loop. |
1457 | bool isARCPseudoStrong() const { return VarDeclBits.ARCPseudoStrong; } |
1458 | void setARCPseudoStrong(bool PS) { VarDeclBits.ARCPseudoStrong = PS; } |
1459 | |
1460 | /// Whether this variable is (C++1z) inline. |
1461 | bool isInline() const { |
1462 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInline; |
1463 | } |
1464 | bool isInlineSpecified() const { |
1465 | return isa<ParmVarDecl>(this) ? false |
1466 | : NonParmVarDeclBits.IsInlineSpecified; |
1467 | } |
1468 | void setInlineSpecified() { |
1469 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1469, __extension__ __PRETTY_FUNCTION__)); |
1470 | NonParmVarDeclBits.IsInline = true; |
1471 | NonParmVarDeclBits.IsInlineSpecified = true; |
1472 | } |
1473 | void setImplicitlyInline() { |
1474 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1474, __extension__ __PRETTY_FUNCTION__)); |
1475 | NonParmVarDeclBits.IsInline = true; |
1476 | } |
1477 | |
1478 | /// Whether this variable is (C++11) constexpr. |
1479 | bool isConstexpr() const { |
1480 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsConstexpr; |
1481 | } |
1482 | void setConstexpr(bool IC) { |
1483 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1483, __extension__ __PRETTY_FUNCTION__)); |
1484 | NonParmVarDeclBits.IsConstexpr = IC; |
1485 | } |
1486 | |
1487 | /// Whether this variable is the implicit variable for a lambda init-capture. |
1488 | bool isInitCapture() const { |
1489 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInitCapture; |
1490 | } |
1491 | void setInitCapture(bool IC) { |
1492 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1492, __extension__ __PRETTY_FUNCTION__)); |
1493 | NonParmVarDeclBits.IsInitCapture = IC; |
1494 | } |
1495 | |
1496 | /// Determine whether this variable is actually a function parameter pack or |
1497 | /// init-capture pack. |
1498 | bool isParameterPack() const; |
1499 | |
1500 | /// Whether this local extern variable declaration's previous declaration |
1501 | /// was declared in the same block scope. Only correct in C++. |
1502 | bool isPreviousDeclInSameBlockScope() const { |
1503 | return isa<ParmVarDecl>(this) |
1504 | ? false |
1505 | : NonParmVarDeclBits.PreviousDeclInSameBlockScope; |
1506 | } |
1507 | void setPreviousDeclInSameBlockScope(bool Same) { |
1508 | assert(!isa<ParmVarDecl>(this))(static_cast <bool> (!isa<ParmVarDecl>(this)) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1508, __extension__ __PRETTY_FUNCTION__)); |
1509 | NonParmVarDeclBits.PreviousDeclInSameBlockScope = Same; |
1510 | } |
1511 | |
1512 | /// Indicates the capture is a __block variable that is captured by a block |
1513 | /// that can potentially escape (a block for which BlockDecl::doesNotEscape |
1514 | /// returns false). |
1515 | bool isEscapingByref() const; |
1516 | |
1517 | /// Indicates the capture is a __block variable that is never captured by an |
1518 | /// escaping block. |
1519 | bool isNonEscapingByref() const; |
1520 | |
1521 | void setEscapingByref() { |
1522 | NonParmVarDeclBits.EscapingByref = true; |
1523 | } |
1524 | |
1525 | /// Determines if this variable's alignment is dependent. |
1526 | bool hasDependentAlignment() const; |
1527 | |
1528 | /// Retrieve the variable declaration from which this variable could |
1529 | /// be instantiated, if it is an instantiation (rather than a non-template). |
1530 | VarDecl *getTemplateInstantiationPattern() const; |
1531 | |
1532 | /// If this variable is an instantiated static data member of a |
1533 | /// class template specialization, returns the templated static data member |
1534 | /// from which it was instantiated. |
1535 | VarDecl *getInstantiatedFromStaticDataMember() const; |
1536 | |
1537 | /// If this variable is an instantiation of a variable template or a |
1538 | /// static data member of a class template, determine what kind of |
1539 | /// template specialization or instantiation this is. |
1540 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
1541 | |
1542 | /// Get the template specialization kind of this variable for the purposes of |
1543 | /// template instantiation. This differs from getTemplateSpecializationKind() |
1544 | /// for an instantiation of a class-scope explicit specialization. |
1545 | TemplateSpecializationKind |
1546 | getTemplateSpecializationKindForInstantiation() const; |
1547 | |
1548 | /// If this variable is an instantiation of a variable template or a |
1549 | /// static data member of a class template, determine its point of |
1550 | /// instantiation. |
1551 | SourceLocation getPointOfInstantiation() const; |
1552 | |
1553 | /// If this variable is an instantiation of a static data member of a |
1554 | /// class template specialization, retrieves the member specialization |
1555 | /// information. |
1556 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
1557 | |
1558 | /// For a static data member that was instantiated from a static |
1559 | /// data member of a class template, set the template specialiation kind. |
1560 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
1561 | SourceLocation PointOfInstantiation = SourceLocation()); |
1562 | |
1563 | /// Specify that this variable is an instantiation of the |
1564 | /// static data member VD. |
1565 | void setInstantiationOfStaticDataMember(VarDecl *VD, |
1566 | TemplateSpecializationKind TSK); |
1567 | |
1568 | /// Retrieves the variable template that is described by this |
1569 | /// variable declaration. |
1570 | /// |
1571 | /// Every variable template is represented as a VarTemplateDecl and a |
1572 | /// VarDecl. The former contains template properties (such as |
1573 | /// the template parameter lists) while the latter contains the |
1574 | /// actual description of the template's |
1575 | /// contents. VarTemplateDecl::getTemplatedDecl() retrieves the |
1576 | /// VarDecl that from a VarTemplateDecl, while |
1577 | /// getDescribedVarTemplate() retrieves the VarTemplateDecl from |
1578 | /// a VarDecl. |
1579 | VarTemplateDecl *getDescribedVarTemplate() const; |
1580 | |
1581 | void setDescribedVarTemplate(VarTemplateDecl *Template); |
1582 | |
1583 | // Is this variable known to have a definition somewhere in the complete |
1584 | // program? This may be true even if the declaration has internal linkage and |
1585 | // has no definition within this source file. |
1586 | bool isKnownToBeDefined() const; |
1587 | |
1588 | /// Is destruction of this variable entirely suppressed? If so, the variable |
1589 | /// need not have a usable destructor at all. |
1590 | bool isNoDestroy(const ASTContext &) const; |
1591 | |
1592 | /// Would the destruction of this variable have any effect, and if so, what |
1593 | /// kind? |
1594 | QualType::DestructionKind needsDestruction(const ASTContext &Ctx) const; |
1595 | |
1596 | // Implement isa/cast/dyncast/etc. |
1597 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1598 | static bool classofKind(Kind K) { return K >= firstVar && K <= lastVar; } |
1599 | }; |
1600 | |
1601 | class ImplicitParamDecl : public VarDecl { |
1602 | void anchor() override; |
1603 | |
1604 | public: |
1605 | /// Defines the kind of the implicit parameter: is this an implicit parameter |
1606 | /// with pointer to 'this', 'self', '_cmd', virtual table pointers, captured |
1607 | /// context or something else. |
1608 | enum ImplicitParamKind : unsigned { |
1609 | /// Parameter for Objective-C 'self' argument |
1610 | ObjCSelf, |
1611 | |
1612 | /// Parameter for Objective-C '_cmd' argument |
1613 | ObjCCmd, |
1614 | |
1615 | /// Parameter for C++ 'this' argument |
1616 | CXXThis, |
1617 | |
1618 | /// Parameter for C++ virtual table pointers |
1619 | CXXVTT, |
1620 | |
1621 | /// Parameter for captured context |
1622 | CapturedContext, |
1623 | |
1624 | /// Other implicit parameter |
1625 | Other, |
1626 | }; |
1627 | |
1628 | /// Create implicit parameter. |
1629 | static ImplicitParamDecl *Create(ASTContext &C, DeclContext *DC, |
1630 | SourceLocation IdLoc, IdentifierInfo *Id, |
1631 | QualType T, ImplicitParamKind ParamKind); |
1632 | static ImplicitParamDecl *Create(ASTContext &C, QualType T, |
1633 | ImplicitParamKind ParamKind); |
1634 | |
1635 | static ImplicitParamDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1636 | |
1637 | ImplicitParamDecl(ASTContext &C, DeclContext *DC, SourceLocation IdLoc, |
1638 | IdentifierInfo *Id, QualType Type, |
1639 | ImplicitParamKind ParamKind) |
1640 | : VarDecl(ImplicitParam, C, DC, IdLoc, IdLoc, Id, Type, |
1641 | /*TInfo=*/nullptr, SC_None) { |
1642 | NonParmVarDeclBits.ImplicitParamKind = ParamKind; |
1643 | setImplicit(); |
1644 | } |
1645 | |
1646 | ImplicitParamDecl(ASTContext &C, QualType Type, ImplicitParamKind ParamKind) |
1647 | : VarDecl(ImplicitParam, C, /*DC=*/nullptr, SourceLocation(), |
1648 | SourceLocation(), /*Id=*/nullptr, Type, |
1649 | /*TInfo=*/nullptr, SC_None) { |
1650 | NonParmVarDeclBits.ImplicitParamKind = ParamKind; |
1651 | setImplicit(); |
1652 | } |
1653 | |
1654 | /// Returns the implicit parameter kind. |
1655 | ImplicitParamKind getParameterKind() const { |
1656 | return static_cast<ImplicitParamKind>(NonParmVarDeclBits.ImplicitParamKind); |
1657 | } |
1658 | |
1659 | // Implement isa/cast/dyncast/etc. |
1660 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1661 | static bool classofKind(Kind K) { return K == ImplicitParam; } |
1662 | }; |
1663 | |
1664 | /// Represents a parameter to a function. |
1665 | class ParmVarDecl : public VarDecl { |
1666 | public: |
1667 | enum { MaxFunctionScopeDepth = 255 }; |
1668 | enum { MaxFunctionScopeIndex = 255 }; |
1669 | |
1670 | protected: |
1671 | ParmVarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1672 | SourceLocation IdLoc, IdentifierInfo *Id, QualType T, |
1673 | TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg) |
1674 | : VarDecl(DK, C, DC, StartLoc, IdLoc, Id, T, TInfo, S) { |
1675 | assert(ParmVarDeclBits.HasInheritedDefaultArg == false)(static_cast <bool> (ParmVarDeclBits.HasInheritedDefaultArg == false) ? void (0) : __assert_fail ("ParmVarDeclBits.HasInheritedDefaultArg == false" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1675, __extension__ __PRETTY_FUNCTION__)); |
1676 | assert(ParmVarDeclBits.DefaultArgKind == DAK_None)(static_cast <bool> (ParmVarDeclBits.DefaultArgKind == DAK_None ) ? void (0) : __assert_fail ("ParmVarDeclBits.DefaultArgKind == DAK_None" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1676, __extension__ __PRETTY_FUNCTION__)); |
1677 | assert(ParmVarDeclBits.IsKNRPromoted == false)(static_cast <bool> (ParmVarDeclBits.IsKNRPromoted == false ) ? void (0) : __assert_fail ("ParmVarDeclBits.IsKNRPromoted == false" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1677, __extension__ __PRETTY_FUNCTION__)); |
1678 | assert(ParmVarDeclBits.IsObjCMethodParam == false)(static_cast <bool> (ParmVarDeclBits.IsObjCMethodParam == false) ? void (0) : __assert_fail ("ParmVarDeclBits.IsObjCMethodParam == false" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1678, __extension__ __PRETTY_FUNCTION__)); |
1679 | setDefaultArg(DefArg); |
1680 | } |
1681 | |
1682 | public: |
1683 | static ParmVarDecl *Create(ASTContext &C, DeclContext *DC, |
1684 | SourceLocation StartLoc, |
1685 | SourceLocation IdLoc, IdentifierInfo *Id, |
1686 | QualType T, TypeSourceInfo *TInfo, |
1687 | StorageClass S, Expr *DefArg); |
1688 | |
1689 | static ParmVarDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1690 | |
1691 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1692 | |
1693 | void setObjCMethodScopeInfo(unsigned parameterIndex) { |
1694 | ParmVarDeclBits.IsObjCMethodParam = true; |
1695 | setParameterIndex(parameterIndex); |
1696 | } |
1697 | |
1698 | void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex) { |
1699 | assert(!ParmVarDeclBits.IsObjCMethodParam)(static_cast <bool> (!ParmVarDeclBits.IsObjCMethodParam ) ? void (0) : __assert_fail ("!ParmVarDeclBits.IsObjCMethodParam" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1699, __extension__ __PRETTY_FUNCTION__)); |
1700 | |
1701 | ParmVarDeclBits.ScopeDepthOrObjCQuals = scopeDepth; |
1702 | assert(ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth(static_cast <bool> (ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && "truncation!") ? void (0) : __assert_fail ("ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && \"truncation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1703, __extension__ __PRETTY_FUNCTION__)) |
1703 | && "truncation!")(static_cast <bool> (ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && "truncation!") ? void (0) : __assert_fail ("ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && \"truncation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1703, __extension__ __PRETTY_FUNCTION__)); |
1704 | |
1705 | setParameterIndex(parameterIndex); |
1706 | } |
1707 | |
1708 | bool isObjCMethodParameter() const { |
1709 | return ParmVarDeclBits.IsObjCMethodParam; |
1710 | } |
1711 | |
1712 | /// Determines whether this parameter is destroyed in the callee function. |
1713 | bool isDestroyedInCallee() const; |
1714 | |
1715 | unsigned getFunctionScopeDepth() const { |
1716 | if (ParmVarDeclBits.IsObjCMethodParam) return 0; |
1717 | return ParmVarDeclBits.ScopeDepthOrObjCQuals; |
1718 | } |
1719 | |
1720 | static constexpr unsigned getMaxFunctionScopeDepth() { |
1721 | return (1u << NumScopeDepthOrObjCQualsBits) - 1; |
1722 | } |
1723 | |
1724 | /// Returns the index of this parameter in its prototype or method scope. |
1725 | unsigned getFunctionScopeIndex() const { |
1726 | return getParameterIndex(); |
1727 | } |
1728 | |
1729 | ObjCDeclQualifier getObjCDeclQualifier() const { |
1730 | if (!ParmVarDeclBits.IsObjCMethodParam) return OBJC_TQ_None; |
1731 | return ObjCDeclQualifier(ParmVarDeclBits.ScopeDepthOrObjCQuals); |
1732 | } |
1733 | void setObjCDeclQualifier(ObjCDeclQualifier QTVal) { |
1734 | assert(ParmVarDeclBits.IsObjCMethodParam)(static_cast <bool> (ParmVarDeclBits.IsObjCMethodParam) ? void (0) : __assert_fail ("ParmVarDeclBits.IsObjCMethodParam" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1734, __extension__ __PRETTY_FUNCTION__)); |
1735 | ParmVarDeclBits.ScopeDepthOrObjCQuals = QTVal; |
1736 | } |
1737 | |
1738 | /// True if the value passed to this parameter must undergo |
1739 | /// K&R-style default argument promotion: |
1740 | /// |
1741 | /// C99 6.5.2.2. |
1742 | /// If the expression that denotes the called function has a type |
1743 | /// that does not include a prototype, the integer promotions are |
1744 | /// performed on each argument, and arguments that have type float |
1745 | /// are promoted to double. |
1746 | bool isKNRPromoted() const { |
1747 | return ParmVarDeclBits.IsKNRPromoted; |
1748 | } |
1749 | void setKNRPromoted(bool promoted) { |
1750 | ParmVarDeclBits.IsKNRPromoted = promoted; |
1751 | } |
1752 | |
1753 | Expr *getDefaultArg(); |
1754 | const Expr *getDefaultArg() const { |
1755 | return const_cast<ParmVarDecl *>(this)->getDefaultArg(); |
1756 | } |
1757 | |
1758 | void setDefaultArg(Expr *defarg); |
1759 | |
1760 | /// Retrieve the source range that covers the entire default |
1761 | /// argument. |
1762 | SourceRange getDefaultArgRange() const; |
1763 | void setUninstantiatedDefaultArg(Expr *arg); |
1764 | Expr *getUninstantiatedDefaultArg(); |
1765 | const Expr *getUninstantiatedDefaultArg() const { |
1766 | return const_cast<ParmVarDecl *>(this)->getUninstantiatedDefaultArg(); |
1767 | } |
1768 | |
1769 | /// Determines whether this parameter has a default argument, |
1770 | /// either parsed or not. |
1771 | bool hasDefaultArg() const; |
1772 | |
1773 | /// Determines whether this parameter has a default argument that has not |
1774 | /// yet been parsed. This will occur during the processing of a C++ class |
1775 | /// whose member functions have default arguments, e.g., |
1776 | /// @code |
1777 | /// class X { |
1778 | /// public: |
1779 | /// void f(int x = 17); // x has an unparsed default argument now |
1780 | /// }; // x has a regular default argument now |
1781 | /// @endcode |
1782 | bool hasUnparsedDefaultArg() const { |
1783 | return ParmVarDeclBits.DefaultArgKind == DAK_Unparsed; |
1784 | } |
1785 | |
1786 | bool hasUninstantiatedDefaultArg() const { |
1787 | return ParmVarDeclBits.DefaultArgKind == DAK_Uninstantiated; |
1788 | } |
1789 | |
1790 | /// Specify that this parameter has an unparsed default argument. |
1791 | /// The argument will be replaced with a real default argument via |
1792 | /// setDefaultArg when the class definition enclosing the function |
1793 | /// declaration that owns this default argument is completed. |
1794 | void setUnparsedDefaultArg() { |
1795 | ParmVarDeclBits.DefaultArgKind = DAK_Unparsed; |
1796 | } |
1797 | |
1798 | bool hasInheritedDefaultArg() const { |
1799 | return ParmVarDeclBits.HasInheritedDefaultArg; |
1800 | } |
1801 | |
1802 | void setHasInheritedDefaultArg(bool I = true) { |
1803 | ParmVarDeclBits.HasInheritedDefaultArg = I; |
1804 | } |
1805 | |
1806 | QualType getOriginalType() const; |
1807 | |
1808 | /// Sets the function declaration that owns this |
1809 | /// ParmVarDecl. Since ParmVarDecls are often created before the |
1810 | /// FunctionDecls that own them, this routine is required to update |
1811 | /// the DeclContext appropriately. |
1812 | void setOwningFunction(DeclContext *FD) { setDeclContext(FD); } |
1813 | |
1814 | // Implement isa/cast/dyncast/etc. |
1815 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1816 | static bool classofKind(Kind K) { return K == ParmVar; } |
1817 | |
1818 | private: |
1819 | enum { ParameterIndexSentinel = (1 << NumParameterIndexBits) - 1 }; |
1820 | |
1821 | void setParameterIndex(unsigned parameterIndex) { |
1822 | if (parameterIndex >= ParameterIndexSentinel) { |
1823 | setParameterIndexLarge(parameterIndex); |
1824 | return; |
1825 | } |
1826 | |
1827 | ParmVarDeclBits.ParameterIndex = parameterIndex; |
1828 | assert(ParmVarDeclBits.ParameterIndex == parameterIndex && "truncation!")(static_cast <bool> (ParmVarDeclBits.ParameterIndex == parameterIndex && "truncation!") ? void (0) : __assert_fail ("ParmVarDeclBits.ParameterIndex == parameterIndex && \"truncation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 1828, __extension__ __PRETTY_FUNCTION__)); |
1829 | } |
1830 | unsigned getParameterIndex() const { |
1831 | unsigned d = ParmVarDeclBits.ParameterIndex; |
1832 | return d == ParameterIndexSentinel ? getParameterIndexLarge() : d; |
1833 | } |
1834 | |
1835 | void setParameterIndexLarge(unsigned parameterIndex); |
1836 | unsigned getParameterIndexLarge() const; |
1837 | }; |
1838 | |
1839 | enum class MultiVersionKind { |
1840 | None, |
1841 | Target, |
1842 | CPUSpecific, |
1843 | CPUDispatch |
1844 | }; |
1845 | |
1846 | /// Represents a function declaration or definition. |
1847 | /// |
1848 | /// Since a given function can be declared several times in a program, |
1849 | /// there may be several FunctionDecls that correspond to that |
1850 | /// function. Only one of those FunctionDecls will be found when |
1851 | /// traversing the list of declarations in the context of the |
1852 | /// FunctionDecl (e.g., the translation unit); this FunctionDecl |
1853 | /// contains all of the information known about the function. Other, |
1854 | /// previous declarations of the function are available via the |
1855 | /// getPreviousDecl() chain. |
1856 | class FunctionDecl : public DeclaratorDecl, |
1857 | public DeclContext, |
1858 | public Redeclarable<FunctionDecl> { |
1859 | // This class stores some data in DeclContext::FunctionDeclBits |
1860 | // to save some space. Use the provided accessors to access it. |
1861 | public: |
1862 | /// The kind of templated function a FunctionDecl can be. |
1863 | enum TemplatedKind { |
1864 | // Not templated. |
1865 | TK_NonTemplate, |
1866 | // The pattern in a function template declaration. |
1867 | TK_FunctionTemplate, |
1868 | // A non-template function that is an instantiation or explicit |
1869 | // specialization of a member of a templated class. |
1870 | TK_MemberSpecialization, |
1871 | // An instantiation or explicit specialization of a function template. |
1872 | // Note: this might have been instantiated from a templated class if it |
1873 | // is a class-scope explicit specialization. |
1874 | TK_FunctionTemplateSpecialization, |
1875 | // A function template specialization that hasn't yet been resolved to a |
1876 | // particular specialized function template. |
1877 | TK_DependentFunctionTemplateSpecialization |
1878 | }; |
1879 | |
1880 | /// Stashed information about a defaulted function definition whose body has |
1881 | /// not yet been lazily generated. |
1882 | class DefaultedFunctionInfo final |
1883 | : llvm::TrailingObjects<DefaultedFunctionInfo, DeclAccessPair> { |
1884 | friend TrailingObjects; |
1885 | unsigned NumLookups; |
1886 | |
1887 | public: |
1888 | static DefaultedFunctionInfo *Create(ASTContext &Context, |
1889 | ArrayRef<DeclAccessPair> Lookups); |
1890 | /// Get the unqualified lookup results that should be used in this |
1891 | /// defaulted function definition. |
1892 | ArrayRef<DeclAccessPair> getUnqualifiedLookups() const { |
1893 | return {getTrailingObjects<DeclAccessPair>(), NumLookups}; |
1894 | } |
1895 | }; |
1896 | |
1897 | private: |
1898 | /// A new[]'d array of pointers to VarDecls for the formal |
1899 | /// parameters of this function. This is null if a prototype or if there are |
1900 | /// no formals. |
1901 | ParmVarDecl **ParamInfo = nullptr; |
1902 | |
1903 | /// The active member of this union is determined by |
1904 | /// FunctionDeclBits.HasDefaultedFunctionInfo. |
1905 | union { |
1906 | /// The body of the function. |
1907 | LazyDeclStmtPtr Body; |
1908 | /// Information about a future defaulted function definition. |
1909 | DefaultedFunctionInfo *DefaultedInfo; |
1910 | }; |
1911 | |
1912 | unsigned ODRHash; |
1913 | |
1914 | /// End part of this FunctionDecl's source range. |
1915 | /// |
1916 | /// We could compute the full range in getSourceRange(). However, when we're |
1917 | /// dealing with a function definition deserialized from a PCH/AST file, |
1918 | /// we can only compute the full range once the function body has been |
1919 | /// de-serialized, so it's far better to have the (sometimes-redundant) |
1920 | /// EndRangeLoc. |
1921 | SourceLocation EndRangeLoc; |
1922 | |
1923 | /// The template or declaration that this declaration |
1924 | /// describes or was instantiated from, respectively. |
1925 | /// |
1926 | /// For non-templates, this value will be NULL. For function |
1927 | /// declarations that describe a function template, this will be a |
1928 | /// pointer to a FunctionTemplateDecl. For member functions |
1929 | /// of class template specializations, this will be a MemberSpecializationInfo |
1930 | /// pointer containing information about the specialization. |
1931 | /// For function template specializations, this will be a |
1932 | /// FunctionTemplateSpecializationInfo, which contains information about |
1933 | /// the template being specialized and the template arguments involved in |
1934 | /// that specialization. |
1935 | llvm::PointerUnion<FunctionTemplateDecl *, |
1936 | MemberSpecializationInfo *, |
1937 | FunctionTemplateSpecializationInfo *, |
1938 | DependentFunctionTemplateSpecializationInfo *> |
1939 | TemplateOrSpecialization; |
1940 | |
1941 | /// Provides source/type location info for the declaration name embedded in |
1942 | /// the DeclaratorDecl base class. |
1943 | DeclarationNameLoc DNLoc; |
1944 | |
1945 | /// Specify that this function declaration is actually a function |
1946 | /// template specialization. |
1947 | /// |
1948 | /// \param C the ASTContext. |
1949 | /// |
1950 | /// \param Template the function template that this function template |
1951 | /// specialization specializes. |
1952 | /// |
1953 | /// \param TemplateArgs the template arguments that produced this |
1954 | /// function template specialization from the template. |
1955 | /// |
1956 | /// \param InsertPos If non-NULL, the position in the function template |
1957 | /// specialization set where the function template specialization data will |
1958 | /// be inserted. |
1959 | /// |
1960 | /// \param TSK the kind of template specialization this is. |
1961 | /// |
1962 | /// \param TemplateArgsAsWritten location info of template arguments. |
1963 | /// |
1964 | /// \param PointOfInstantiation point at which the function template |
1965 | /// specialization was first instantiated. |
1966 | void setFunctionTemplateSpecialization(ASTContext &C, |
1967 | FunctionTemplateDecl *Template, |
1968 | const TemplateArgumentList *TemplateArgs, |
1969 | void *InsertPos, |
1970 | TemplateSpecializationKind TSK, |
1971 | const TemplateArgumentListInfo *TemplateArgsAsWritten, |
1972 | SourceLocation PointOfInstantiation); |
1973 | |
1974 | /// Specify that this record is an instantiation of the |
1975 | /// member function FD. |
1976 | void setInstantiationOfMemberFunction(ASTContext &C, FunctionDecl *FD, |
1977 | TemplateSpecializationKind TSK); |
1978 | |
1979 | void setParams(ASTContext &C, ArrayRef<ParmVarDecl *> NewParamInfo); |
1980 | |
1981 | // This is unfortunately needed because ASTDeclWriter::VisitFunctionDecl |
1982 | // need to access this bit but we want to avoid making ASTDeclWriter |
1983 | // a friend of FunctionDeclBitfields just for this. |
1984 | bool isDeletedBit() const { return FunctionDeclBits.IsDeleted; } |
1985 | |
1986 | /// Whether an ODRHash has been stored. |
1987 | bool hasODRHash() const { return FunctionDeclBits.HasODRHash; } |
1988 | |
1989 | /// State that an ODRHash has been stored. |
1990 | void setHasODRHash(bool B = true) { FunctionDeclBits.HasODRHash = B; } |
1991 | |
1992 | protected: |
1993 | FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1994 | const DeclarationNameInfo &NameInfo, QualType T, |
1995 | TypeSourceInfo *TInfo, StorageClass S, bool UsesFPIntrin, |
1996 | bool isInlineSpecified, ConstexprSpecKind ConstexprKind, |
1997 | Expr *TrailingRequiresClause = nullptr); |
1998 | |
1999 | using redeclarable_base = Redeclarable<FunctionDecl>; |
2000 | |
2001 | FunctionDecl *getNextRedeclarationImpl() override { |
2002 | return getNextRedeclaration(); |
2003 | } |
2004 | |
2005 | FunctionDecl *getPreviousDeclImpl() override { |
2006 | return getPreviousDecl(); |
2007 | } |
2008 | |
2009 | FunctionDecl *getMostRecentDeclImpl() override { |
2010 | return getMostRecentDecl(); |
2011 | } |
2012 | |
2013 | public: |
2014 | friend class ASTDeclReader; |
2015 | friend class ASTDeclWriter; |
2016 | |
2017 | using redecl_range = redeclarable_base::redecl_range; |
2018 | using redecl_iterator = redeclarable_base::redecl_iterator; |
2019 | |
2020 | using redeclarable_base::redecls_begin; |
2021 | using redeclarable_base::redecls_end; |
2022 | using redeclarable_base::redecls; |
2023 | using redeclarable_base::getPreviousDecl; |
2024 | using redeclarable_base::getMostRecentDecl; |
2025 | using redeclarable_base::isFirstDecl; |
2026 | |
2027 | static FunctionDecl * |
2028 | Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
2029 | SourceLocation NLoc, DeclarationName N, QualType T, |
2030 | TypeSourceInfo *TInfo, StorageClass SC, bool UsesFPIntrin = false, |
2031 | bool isInlineSpecified = false, bool hasWrittenPrototype = true, |
2032 | ConstexprSpecKind ConstexprKind = ConstexprSpecKind::Unspecified, |
2033 | Expr *TrailingRequiresClause = nullptr) { |
2034 | DeclarationNameInfo NameInfo(N, NLoc); |
2035 | return FunctionDecl::Create(C, DC, StartLoc, NameInfo, T, TInfo, SC, |
2036 | UsesFPIntrin, isInlineSpecified, |
2037 | hasWrittenPrototype, ConstexprKind, |
2038 | TrailingRequiresClause); |
2039 | } |
2040 | |
2041 | static FunctionDecl * |
2042 | Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
2043 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
2044 | StorageClass SC, bool UsesFPIntrin, bool isInlineSpecified, |
2045 | bool hasWrittenPrototype, ConstexprSpecKind ConstexprKind, |
2046 | Expr *TrailingRequiresClause); |
2047 | |
2048 | static FunctionDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2049 | |
2050 | DeclarationNameInfo getNameInfo() const { |
2051 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
2052 | } |
2053 | |
2054 | void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, |
2055 | bool Qualified) const override; |
2056 | |
2057 | void setRangeEnd(SourceLocation E) { EndRangeLoc = E; } |
2058 | |
2059 | /// Returns the location of the ellipsis of a variadic function. |
2060 | SourceLocation getEllipsisLoc() const { |
2061 | const auto *FPT = getType()->getAs<FunctionProtoType>(); |
2062 | if (FPT && FPT->isVariadic()) |
2063 | return FPT->getEllipsisLoc(); |
2064 | return SourceLocation(); |
2065 | } |
2066 | |
2067 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
2068 | |
2069 | // Function definitions. |
2070 | // |
2071 | // A function declaration may be: |
2072 | // - a non defining declaration, |
2073 | // - a definition. A function may be defined because: |
2074 | // - it has a body, or will have it in the case of late parsing. |
2075 | // - it has an uninstantiated body. The body does not exist because the |
2076 | // function is not used yet, but the declaration is considered a |
2077 | // definition and does not allow other definition of this function. |
2078 | // - it does not have a user specified body, but it does not allow |
2079 | // redefinition, because it is deleted/defaulted or is defined through |
2080 | // some other mechanism (alias, ifunc). |
2081 | |
2082 | /// Returns true if the function has a body. |
2083 | /// |
2084 | /// The function body might be in any of the (re-)declarations of this |
2085 | /// function. The variant that accepts a FunctionDecl pointer will set that |
2086 | /// function declaration to the actual declaration containing the body (if |
2087 | /// there is one). |
2088 | bool hasBody(const FunctionDecl *&Definition) const; |
2089 | |
2090 | bool hasBody() const override { |
2091 | const FunctionDecl* Definition; |
2092 | return hasBody(Definition); |
2093 | } |
2094 | |
2095 | /// Returns whether the function has a trivial body that does not require any |
2096 | /// specific codegen. |
2097 | bool hasTrivialBody() const; |
2098 | |
2099 | /// Returns true if the function has a definition that does not need to be |
2100 | /// instantiated. |
2101 | /// |
2102 | /// The variant that accepts a FunctionDecl pointer will set that function |
2103 | /// declaration to the declaration that is a definition (if there is one). |
2104 | /// |
2105 | /// \param CheckForPendingFriendDefinition If \c true, also check for friend |
2106 | /// declarations that were instantiataed from function definitions. |
2107 | /// Such a declaration behaves as if it is a definition for the |
2108 | /// purpose of redefinition checking, but isn't actually a "real" |
2109 | /// definition until its body is instantiated. |
2110 | bool isDefined(const FunctionDecl *&Definition, |
2111 | bool CheckForPendingFriendDefinition = false) const; |
2112 | |
2113 | bool isDefined() const { |
2114 | const FunctionDecl* Definition; |
2115 | return isDefined(Definition); |
2116 | } |
2117 | |
2118 | /// Get the definition for this declaration. |
2119 | FunctionDecl *getDefinition() { |
2120 | const FunctionDecl *Definition; |
2121 | if (isDefined(Definition)) |
2122 | return const_cast<FunctionDecl *>(Definition); |
2123 | return nullptr; |
2124 | } |
2125 | const FunctionDecl *getDefinition() const { |
2126 | return const_cast<FunctionDecl *>(this)->getDefinition(); |
2127 | } |
2128 | |
2129 | /// Retrieve the body (definition) of the function. The function body might be |
2130 | /// in any of the (re-)declarations of this function. The variant that accepts |
2131 | /// a FunctionDecl pointer will set that function declaration to the actual |
2132 | /// declaration containing the body (if there is one). |
2133 | /// NOTE: For checking if there is a body, use hasBody() instead, to avoid |
2134 | /// unnecessary AST de-serialization of the body. |
2135 | Stmt *getBody(const FunctionDecl *&Definition) const; |
2136 | |
2137 | Stmt *getBody() const override { |
2138 | const FunctionDecl* Definition; |
2139 | return getBody(Definition); |
2140 | } |
2141 | |
2142 | /// Returns whether this specific declaration of the function is also a |
2143 | /// definition that does not contain uninstantiated body. |
2144 | /// |
2145 | /// This does not determine whether the function has been defined (e.g., in a |
2146 | /// previous definition); for that information, use isDefined. |
2147 | /// |
2148 | /// Note: the function declaration does not become a definition until the |
2149 | /// parser reaches the definition, if called before, this function will return |
2150 | /// `false`. |
2151 | bool isThisDeclarationADefinition() const { |
2152 | return isDeletedAsWritten() || isDefaulted() || |
2153 | doesThisDeclarationHaveABody() || hasSkippedBody() || |
2154 | willHaveBody() || hasDefiningAttr(); |
2155 | } |
2156 | |
2157 | /// Determine whether this specific declaration of the function is a friend |
2158 | /// declaration that was instantiated from a function definition. Such |
2159 | /// declarations behave like definitions in some contexts. |
2160 | bool isThisDeclarationInstantiatedFromAFriendDefinition() const; |
2161 | |
2162 | /// Returns whether this specific declaration of the function has a body. |
2163 | bool doesThisDeclarationHaveABody() const { |
2164 | return (!FunctionDeclBits.HasDefaultedFunctionInfo && Body) || |
2165 | isLateTemplateParsed(); |
2166 | } |
2167 | |
2168 | void setBody(Stmt *B); |
2169 | void setLazyBody(uint64_t Offset) { |
2170 | FunctionDeclBits.HasDefaultedFunctionInfo = false; |
2171 | Body = LazyDeclStmtPtr(Offset); |
2172 | } |
2173 | |
2174 | void setDefaultedFunctionInfo(DefaultedFunctionInfo *Info); |
2175 | DefaultedFunctionInfo *getDefaultedFunctionInfo() const; |
2176 | |
2177 | /// Whether this function is variadic. |
2178 | bool isVariadic() const; |
2179 | |
2180 | /// Whether this function is marked as virtual explicitly. |
2181 | bool isVirtualAsWritten() const { |
2182 | return FunctionDeclBits.IsVirtualAsWritten; |
2183 | } |
2184 | |
2185 | /// State that this function is marked as virtual explicitly. |
2186 | void setVirtualAsWritten(bool V) { FunctionDeclBits.IsVirtualAsWritten = V; } |
2187 | |
2188 | /// Whether this virtual function is pure, i.e. makes the containing class |
2189 | /// abstract. |
2190 | bool isPure() const { return FunctionDeclBits.IsPure; } |
2191 | void setPure(bool P = true); |
2192 | |
2193 | /// Whether this templated function will be late parsed. |
2194 | bool isLateTemplateParsed() const { |
2195 | return FunctionDeclBits.IsLateTemplateParsed; |
2196 | } |
2197 | |
2198 | /// State that this templated function will be late parsed. |
2199 | void setLateTemplateParsed(bool ILT = true) { |
2200 | FunctionDeclBits.IsLateTemplateParsed = ILT; |
2201 | } |
2202 | |
2203 | /// Whether this function is "trivial" in some specialized C++ senses. |
2204 | /// Can only be true for default constructors, copy constructors, |
2205 | /// copy assignment operators, and destructors. Not meaningful until |
2206 | /// the class has been fully built by Sema. |
2207 | bool isTrivial() const { return FunctionDeclBits.IsTrivial; } |
2208 | void setTrivial(bool IT) { FunctionDeclBits.IsTrivial = IT; } |
2209 | |
2210 | bool isTrivialForCall() const { return FunctionDeclBits.IsTrivialForCall; } |
2211 | void setTrivialForCall(bool IT) { FunctionDeclBits.IsTrivialForCall = IT; } |
2212 | |
2213 | /// Whether this function is defaulted. Valid for e.g. |
2214 | /// special member functions, defaulted comparisions (not methods!). |
2215 | bool isDefaulted() const { return FunctionDeclBits.IsDefaulted; } |
2216 | void setDefaulted(bool D = true) { FunctionDeclBits.IsDefaulted = D; } |
2217 | |
2218 | /// Whether this function is explicitly defaulted. |
2219 | bool isExplicitlyDefaulted() const { |
2220 | return FunctionDeclBits.IsExplicitlyDefaulted; |
2221 | } |
2222 | |
2223 | /// State that this function is explicitly defaulted. |
2224 | void setExplicitlyDefaulted(bool ED = true) { |
2225 | FunctionDeclBits.IsExplicitlyDefaulted = ED; |
2226 | } |
2227 | |
2228 | /// True if this method is user-declared and was not |
2229 | /// deleted or defaulted on its first declaration. |
2230 | bool isUserProvided() const { |
2231 | auto *DeclAsWritten = this; |
2232 | if (FunctionDecl *Pattern = getTemplateInstantiationPattern()) |
2233 | DeclAsWritten = Pattern; |
2234 | return !(DeclAsWritten->isDeleted() || |
2235 | DeclAsWritten->getCanonicalDecl()->isDefaulted()); |
2236 | } |
2237 | |
2238 | /// Whether falling off this function implicitly returns null/zero. |
2239 | /// If a more specific implicit return value is required, front-ends |
2240 | /// should synthesize the appropriate return statements. |
2241 | bool hasImplicitReturnZero() const { |
2242 | return FunctionDeclBits.HasImplicitReturnZero; |
2243 | } |
2244 | |
2245 | /// State that falling off this function implicitly returns null/zero. |
2246 | /// If a more specific implicit return value is required, front-ends |
2247 | /// should synthesize the appropriate return statements. |
2248 | void setHasImplicitReturnZero(bool IRZ) { |
2249 | FunctionDeclBits.HasImplicitReturnZero = IRZ; |
2250 | } |
2251 | |
2252 | /// Whether this function has a prototype, either because one |
2253 | /// was explicitly written or because it was "inherited" by merging |
2254 | /// a declaration without a prototype with a declaration that has a |
2255 | /// prototype. |
2256 | bool hasPrototype() const { |
2257 | return hasWrittenPrototype() || hasInheritedPrototype(); |
2258 | } |
2259 | |
2260 | /// Whether this function has a written prototype. |
2261 | bool hasWrittenPrototype() const { |
2262 | return FunctionDeclBits.HasWrittenPrototype; |
2263 | } |
2264 | |
2265 | /// State that this function has a written prototype. |
2266 | void setHasWrittenPrototype(bool P = true) { |
2267 | FunctionDeclBits.HasWrittenPrototype = P; |
2268 | } |
2269 | |
2270 | /// Whether this function inherited its prototype from a |
2271 | /// previous declaration. |
2272 | bool hasInheritedPrototype() const { |
2273 | return FunctionDeclBits.HasInheritedPrototype; |
2274 | } |
2275 | |
2276 | /// State that this function inherited its prototype from a |
2277 | /// previous declaration. |
2278 | void setHasInheritedPrototype(bool P = true) { |
2279 | FunctionDeclBits.HasInheritedPrototype = P; |
2280 | } |
2281 | |
2282 | /// Whether this is a (C++11) constexpr function or constexpr constructor. |
2283 | bool isConstexpr() const { |
2284 | return getConstexprKind() != ConstexprSpecKind::Unspecified; |
2285 | } |
2286 | void setConstexprKind(ConstexprSpecKind CSK) { |
2287 | FunctionDeclBits.ConstexprKind = static_cast<uint64_t>(CSK); |
2288 | } |
2289 | ConstexprSpecKind getConstexprKind() const { |
2290 | return static_cast<ConstexprSpecKind>(FunctionDeclBits.ConstexprKind); |
2291 | } |
2292 | bool isConstexprSpecified() const { |
2293 | return getConstexprKind() == ConstexprSpecKind::Constexpr; |
2294 | } |
2295 | bool isConsteval() const { |
2296 | return getConstexprKind() == ConstexprSpecKind::Consteval; |
2297 | } |
2298 | |
2299 | /// Whether the instantiation of this function is pending. |
2300 | /// This bit is set when the decision to instantiate this function is made |
2301 | /// and unset if and when the function body is created. That leaves out |
2302 | /// cases where instantiation did not happen because the template definition |
2303 | /// was not seen in this TU. This bit remains set in those cases, under the |
2304 | /// assumption that the instantiation will happen in some other TU. |
2305 | bool instantiationIsPending() const { |
2306 | return FunctionDeclBits.InstantiationIsPending; |
2307 | } |
2308 | |
2309 | /// State that the instantiation of this function is pending. |
2310 | /// (see instantiationIsPending) |
2311 | void setInstantiationIsPending(bool IC) { |
2312 | FunctionDeclBits.InstantiationIsPending = IC; |
2313 | } |
2314 | |
2315 | /// Indicates the function uses __try. |
2316 | bool usesSEHTry() const { return FunctionDeclBits.UsesSEHTry; } |
2317 | void setUsesSEHTry(bool UST) { FunctionDeclBits.UsesSEHTry = UST; } |
2318 | |
2319 | /// Whether this function has been deleted. |
2320 | /// |
2321 | /// A function that is "deleted" (via the C++0x "= delete" syntax) |
2322 | /// acts like a normal function, except that it cannot actually be |
2323 | /// called or have its address taken. Deleted functions are |
2324 | /// typically used in C++ overload resolution to attract arguments |
2325 | /// whose type or lvalue/rvalue-ness would permit the use of a |
2326 | /// different overload that would behave incorrectly. For example, |
2327 | /// one might use deleted functions to ban implicit conversion from |
2328 | /// a floating-point number to an Integer type: |
2329 | /// |
2330 | /// @code |
2331 | /// struct Integer { |
2332 | /// Integer(long); // construct from a long |
2333 | /// Integer(double) = delete; // no construction from float or double |
2334 | /// Integer(long double) = delete; // no construction from long double |
2335 | /// }; |
2336 | /// @endcode |
2337 | // If a function is deleted, its first declaration must be. |
2338 | bool isDeleted() const { |
2339 | return getCanonicalDecl()->FunctionDeclBits.IsDeleted; |
2340 | } |
2341 | |
2342 | bool isDeletedAsWritten() const { |
2343 | return FunctionDeclBits.IsDeleted && !isDefaulted(); |
2344 | } |
2345 | |
2346 | void setDeletedAsWritten(bool D = true) { FunctionDeclBits.IsDeleted = D; } |
2347 | |
2348 | /// Determines whether this function is "main", which is the |
2349 | /// entry point into an executable program. |
2350 | bool isMain() const; |
2351 | |
2352 | /// Determines whether this function is a MSVCRT user defined entry |
2353 | /// point. |
2354 | bool isMSVCRTEntryPoint() const; |
2355 | |
2356 | /// Determines whether this operator new or delete is one |
2357 | /// of the reserved global placement operators: |
2358 | /// void *operator new(size_t, void *); |
2359 | /// void *operator new[](size_t, void *); |
2360 | /// void operator delete(void *, void *); |
2361 | /// void operator delete[](void *, void *); |
2362 | /// These functions have special behavior under [new.delete.placement]: |
2363 | /// These functions are reserved, a C++ program may not define |
2364 | /// functions that displace the versions in the Standard C++ library. |
2365 | /// The provisions of [basic.stc.dynamic] do not apply to these |
2366 | /// reserved placement forms of operator new and operator delete. |
2367 | /// |
2368 | /// This function must be an allocation or deallocation function. |
2369 | bool isReservedGlobalPlacementOperator() const; |
2370 | |
2371 | /// Determines whether this function is one of the replaceable |
2372 | /// global allocation functions: |
2373 | /// void *operator new(size_t); |
2374 | /// void *operator new(size_t, const std::nothrow_t &) noexcept; |
2375 | /// void *operator new[](size_t); |
2376 | /// void *operator new[](size_t, const std::nothrow_t &) noexcept; |
2377 | /// void operator delete(void *) noexcept; |
2378 | /// void operator delete(void *, std::size_t) noexcept; [C++1y] |
2379 | /// void operator delete(void *, const std::nothrow_t &) noexcept; |
2380 | /// void operator delete[](void *) noexcept; |
2381 | /// void operator delete[](void *, std::size_t) noexcept; [C++1y] |
2382 | /// void operator delete[](void *, const std::nothrow_t &) noexcept; |
2383 | /// These functions have special behavior under C++1y [expr.new]: |
2384 | /// An implementation is allowed to omit a call to a replaceable global |
2385 | /// allocation function. [...] |
2386 | /// |
2387 | /// If this function is an aligned allocation/deallocation function, return |
2388 | /// the parameter number of the requested alignment through AlignmentParam. |
2389 | /// |
2390 | /// If this function is an allocation/deallocation function that takes |
2391 | /// the `std::nothrow_t` tag, return true through IsNothrow, |
2392 | bool isReplaceableGlobalAllocationFunction( |
2393 | Optional<unsigned> *AlignmentParam = nullptr, |
2394 | bool *IsNothrow = nullptr) const; |
2395 | |
2396 | /// Determine if this function provides an inline implementation of a builtin. |
2397 | bool isInlineBuiltinDeclaration() const; |
2398 | |
2399 | /// Determine whether this is a destroying operator delete. |
2400 | bool isDestroyingOperatorDelete() const; |
2401 | |
2402 | /// Compute the language linkage. |
2403 | LanguageLinkage getLanguageLinkage() const; |
2404 | |
2405 | /// Determines whether this function is a function with |
2406 | /// external, C linkage. |
2407 | bool isExternC() const; |
2408 | |
2409 | /// Determines whether this function's context is, or is nested within, |
2410 | /// a C++ extern "C" linkage spec. |
2411 | bool isInExternCContext() const; |
2412 | |
2413 | /// Determines whether this function's context is, or is nested within, |
2414 | /// a C++ extern "C++" linkage spec. |
2415 | bool isInExternCXXContext() const; |
2416 | |
2417 | /// Determines whether this is a global function. |
2418 | bool isGlobal() const; |
2419 | |
2420 | /// Determines whether this function is known to be 'noreturn', through |
2421 | /// an attribute on its declaration or its type. |
2422 | bool isNoReturn() const; |
2423 | |
2424 | /// True if the function was a definition but its body was skipped. |
2425 | bool hasSkippedBody() const { return FunctionDeclBits.HasSkippedBody; } |
2426 | void setHasSkippedBody(bool Skipped = true) { |
2427 | FunctionDeclBits.HasSkippedBody = Skipped; |
2428 | } |
2429 | |
2430 | /// True if this function will eventually have a body, once it's fully parsed. |
2431 | bool willHaveBody() const { return FunctionDeclBits.WillHaveBody; } |
2432 | void setWillHaveBody(bool V = true) { FunctionDeclBits.WillHaveBody = V; } |
2433 | |
2434 | /// True if this function is considered a multiversioned function. |
2435 | bool isMultiVersion() const { |
2436 | return getCanonicalDecl()->FunctionDeclBits.IsMultiVersion; |
2437 | } |
2438 | |
2439 | /// Sets the multiversion state for this declaration and all of its |
2440 | /// redeclarations. |
2441 | void setIsMultiVersion(bool V = true) { |
2442 | getCanonicalDecl()->FunctionDeclBits.IsMultiVersion = V; |
2443 | } |
2444 | |
2445 | /// Gets the kind of multiversioning attribute this declaration has. Note that |
2446 | /// this can return a value even if the function is not multiversion, such as |
2447 | /// the case of 'target'. |
2448 | MultiVersionKind getMultiVersionKind() const; |
2449 | |
2450 | |
2451 | /// True if this function is a multiversioned dispatch function as a part of |
2452 | /// the cpu_specific/cpu_dispatch functionality. |
2453 | bool isCPUDispatchMultiVersion() const; |
2454 | /// True if this function is a multiversioned processor specific function as a |
2455 | /// part of the cpu_specific/cpu_dispatch functionality. |
2456 | bool isCPUSpecificMultiVersion() const; |
2457 | |
2458 | /// True if this function is a multiversioned dispatch function as a part of |
2459 | /// the target functionality. |
2460 | bool isTargetMultiVersion() const; |
2461 | |
2462 | /// \brief Get the associated-constraints of this function declaration. |
2463 | /// Currently, this will either be a vector of size 1 containing the |
2464 | /// trailing-requires-clause or an empty vector. |
2465 | /// |
2466 | /// Use this instead of getTrailingRequiresClause for concepts APIs that |
2467 | /// accept an ArrayRef of constraint expressions. |
2468 | void getAssociatedConstraints(SmallVectorImpl<const Expr *> &AC) const { |
2469 | if (auto *TRC = getTrailingRequiresClause()) |
2470 | AC.push_back(TRC); |
2471 | } |
2472 | |
2473 | void setPreviousDeclaration(FunctionDecl * PrevDecl); |
2474 | |
2475 | FunctionDecl *getCanonicalDecl() override; |
2476 | const FunctionDecl *getCanonicalDecl() const { |
2477 | return const_cast<FunctionDecl*>(this)->getCanonicalDecl(); |
2478 | } |
2479 | |
2480 | unsigned getBuiltinID(bool ConsiderWrapperFunctions = false) const; |
2481 | |
2482 | // ArrayRef interface to parameters. |
2483 | ArrayRef<ParmVarDecl *> parameters() const { |
2484 | return {ParamInfo, getNumParams()}; |
2485 | } |
2486 | MutableArrayRef<ParmVarDecl *> parameters() { |
2487 | return {ParamInfo, getNumParams()}; |
2488 | } |
2489 | |
2490 | // Iterator access to formal parameters. |
2491 | using param_iterator = MutableArrayRef<ParmVarDecl *>::iterator; |
2492 | using param_const_iterator = ArrayRef<ParmVarDecl *>::const_iterator; |
2493 | |
2494 | bool param_empty() const { return parameters().empty(); } |
2495 | param_iterator param_begin() { return parameters().begin(); } |
2496 | param_iterator param_end() { return parameters().end(); } |
2497 | param_const_iterator param_begin() const { return parameters().begin(); } |
2498 | param_const_iterator param_end() const { return parameters().end(); } |
2499 | size_t param_size() const { return parameters().size(); } |
2500 | |
2501 | /// Return the number of parameters this function must have based on its |
2502 | /// FunctionType. This is the length of the ParamInfo array after it has been |
2503 | /// created. |
2504 | unsigned getNumParams() const; |
2505 | |
2506 | const ParmVarDecl *getParamDecl(unsigned i) const { |
2507 | assert(i < getNumParams() && "Illegal param #")(static_cast <bool> (i < getNumParams() && "Illegal param #" ) ? void (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2507, __extension__ __PRETTY_FUNCTION__)); |
2508 | return ParamInfo[i]; |
2509 | } |
2510 | ParmVarDecl *getParamDecl(unsigned i) { |
2511 | assert(i < getNumParams() && "Illegal param #")(static_cast <bool> (i < getNumParams() && "Illegal param #" ) ? void (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2511, __extension__ __PRETTY_FUNCTION__)); |
2512 | return ParamInfo[i]; |
2513 | } |
2514 | void setParams(ArrayRef<ParmVarDecl *> NewParamInfo) { |
2515 | setParams(getASTContext(), NewParamInfo); |
2516 | } |
2517 | |
2518 | /// Returns the minimum number of arguments needed to call this function. This |
2519 | /// may be fewer than the number of function parameters, if some of the |
2520 | /// parameters have default arguments (in C++). |
2521 | unsigned getMinRequiredArguments() const; |
2522 | |
2523 | /// Determine whether this function has a single parameter, or multiple |
2524 | /// parameters where all but the first have default arguments. |
2525 | /// |
2526 | /// This notion is used in the definition of copy/move constructors and |
2527 | /// initializer list constructors. Note that, unlike getMinRequiredArguments, |
2528 | /// parameter packs are not treated specially here. |
2529 | bool hasOneParamOrDefaultArgs() const; |
2530 | |
2531 | /// Find the source location information for how the type of this function |
2532 | /// was written. May be absent (for example if the function was declared via |
2533 | /// a typedef) and may contain a different type from that of the function |
2534 | /// (for example if the function type was adjusted by an attribute). |
2535 | FunctionTypeLoc getFunctionTypeLoc() const; |
2536 | |
2537 | QualType getReturnType() const { |
2538 | return getType()->castAs<FunctionType>()->getReturnType(); |
2539 | } |
2540 | |
2541 | /// Attempt to compute an informative source range covering the |
2542 | /// function return type. This may omit qualifiers and other information with |
2543 | /// limited representation in the AST. |
2544 | SourceRange getReturnTypeSourceRange() const; |
2545 | |
2546 | /// Attempt to compute an informative source range covering the |
2547 | /// function parameters, including the ellipsis of a variadic function. |
2548 | /// The source range excludes the parentheses, and is invalid if there are |
2549 | /// no parameters and no ellipsis. |
2550 | SourceRange getParametersSourceRange() const; |
2551 | |
2552 | /// Get the declared return type, which may differ from the actual return |
2553 | /// type if the return type is deduced. |
2554 | QualType getDeclaredReturnType() const { |
2555 | auto *TSI = getTypeSourceInfo(); |
2556 | QualType T = TSI ? TSI->getType() : getType(); |
2557 | return T->castAs<FunctionType>()->getReturnType(); |
2558 | } |
2559 | |
2560 | /// Gets the ExceptionSpecificationType as declared. |
2561 | ExceptionSpecificationType getExceptionSpecType() const { |
2562 | auto *TSI = getTypeSourceInfo(); |
2563 | QualType T = TSI ? TSI->getType() : getType(); |
2564 | const auto *FPT = T->getAs<FunctionProtoType>(); |
2565 | return FPT ? FPT->getExceptionSpecType() : EST_None; |
2566 | } |
2567 | |
2568 | /// Attempt to compute an informative source range covering the |
2569 | /// function exception specification, if any. |
2570 | SourceRange getExceptionSpecSourceRange() const; |
2571 | |
2572 | /// Determine the type of an expression that calls this function. |
2573 | QualType getCallResultType() const { |
2574 | return getType()->castAs<FunctionType>()->getCallResultType( |
2575 | getASTContext()); |
2576 | } |
2577 | |
2578 | /// Returns the storage class as written in the source. For the |
2579 | /// computed linkage of symbol, see getLinkage. |
2580 | StorageClass getStorageClass() const { |
2581 | return static_cast<StorageClass>(FunctionDeclBits.SClass); |
2582 | } |
2583 | |
2584 | /// Sets the storage class as written in the source. |
2585 | void setStorageClass(StorageClass SClass) { |
2586 | FunctionDeclBits.SClass = SClass; |
2587 | } |
2588 | |
2589 | /// Determine whether the "inline" keyword was specified for this |
2590 | /// function. |
2591 | bool isInlineSpecified() const { return FunctionDeclBits.IsInlineSpecified; } |
2592 | |
2593 | /// Set whether the "inline" keyword was specified for this function. |
2594 | void setInlineSpecified(bool I) { |
2595 | FunctionDeclBits.IsInlineSpecified = I; |
2596 | FunctionDeclBits.IsInline = I; |
2597 | } |
2598 | |
2599 | /// Determine whether the function was declared in source context |
2600 | /// that requires constrained FP intrinsics |
2601 | bool UsesFPIntrin() const { return FunctionDeclBits.UsesFPIntrin; } |
2602 | |
2603 | /// Set whether the function was declared in source context |
2604 | /// that requires constrained FP intrinsics |
2605 | void setUsesFPIntrin(bool I) { FunctionDeclBits.UsesFPIntrin = I; } |
2606 | |
2607 | /// Flag that this function is implicitly inline. |
2608 | void setImplicitlyInline(bool I = true) { FunctionDeclBits.IsInline = I; } |
2609 | |
2610 | /// Determine whether this function should be inlined, because it is |
2611 | /// either marked "inline" or "constexpr" or is a member function of a class |
2612 | /// that was defined in the class body. |
2613 | bool isInlined() const { return FunctionDeclBits.IsInline; } |
2614 | |
2615 | bool isInlineDefinitionExternallyVisible() const; |
2616 | |
2617 | bool isMSExternInline() const; |
2618 | |
2619 | bool doesDeclarationForceExternallyVisibleDefinition() const; |
2620 | |
2621 | bool isStatic() const { return getStorageClass() == SC_Static; } |
2622 | |
2623 | /// Whether this function declaration represents an C++ overloaded |
2624 | /// operator, e.g., "operator+". |
2625 | bool isOverloadedOperator() const { |
2626 | return getOverloadedOperator() != OO_None; |
2627 | } |
2628 | |
2629 | OverloadedOperatorKind getOverloadedOperator() const; |
2630 | |
2631 | const IdentifierInfo *getLiteralIdentifier() const; |
2632 | |
2633 | /// If this function is an instantiation of a member function |
2634 | /// of a class template specialization, retrieves the function from |
2635 | /// which it was instantiated. |
2636 | /// |
2637 | /// This routine will return non-NULL for (non-templated) member |
2638 | /// functions of class templates and for instantiations of function |
2639 | /// templates. For example, given: |
2640 | /// |
2641 | /// \code |
2642 | /// template<typename T> |
2643 | /// struct X { |
2644 | /// void f(T); |
2645 | /// }; |
2646 | /// \endcode |
2647 | /// |
2648 | /// The declaration for X<int>::f is a (non-templated) FunctionDecl |
2649 | /// whose parent is the class template specialization X<int>. For |
2650 | /// this declaration, getInstantiatedFromFunction() will return |
2651 | /// the FunctionDecl X<T>::A. When a complete definition of |
2652 | /// X<int>::A is required, it will be instantiated from the |
2653 | /// declaration returned by getInstantiatedFromMemberFunction(). |
2654 | FunctionDecl *getInstantiatedFromMemberFunction() const; |
2655 | |
2656 | /// What kind of templated function this is. |
2657 | TemplatedKind getTemplatedKind() const; |
2658 | |
2659 | /// If this function is an instantiation of a member function of a |
2660 | /// class template specialization, retrieves the member specialization |
2661 | /// information. |
2662 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
2663 | |
2664 | /// Specify that this record is an instantiation of the |
2665 | /// member function FD. |
2666 | void setInstantiationOfMemberFunction(FunctionDecl *FD, |
2667 | TemplateSpecializationKind TSK) { |
2668 | setInstantiationOfMemberFunction(getASTContext(), FD, TSK); |
2669 | } |
2670 | |
2671 | /// Retrieves the function template that is described by this |
2672 | /// function declaration. |
2673 | /// |
2674 | /// Every function template is represented as a FunctionTemplateDecl |
2675 | /// and a FunctionDecl (or something derived from FunctionDecl). The |
2676 | /// former contains template properties (such as the template |
2677 | /// parameter lists) while the latter contains the actual |
2678 | /// description of the template's |
2679 | /// contents. FunctionTemplateDecl::getTemplatedDecl() retrieves the |
2680 | /// FunctionDecl that describes the function template, |
2681 | /// getDescribedFunctionTemplate() retrieves the |
2682 | /// FunctionTemplateDecl from a FunctionDecl. |
2683 | FunctionTemplateDecl *getDescribedFunctionTemplate() const; |
2684 | |
2685 | void setDescribedFunctionTemplate(FunctionTemplateDecl *Template); |
2686 | |
2687 | /// Determine whether this function is a function template |
2688 | /// specialization. |
2689 | bool isFunctionTemplateSpecialization() const { |
2690 | return getPrimaryTemplate() != nullptr; |
2691 | } |
2692 | |
2693 | /// If this function is actually a function template specialization, |
2694 | /// retrieve information about this function template specialization. |
2695 | /// Otherwise, returns NULL. |
2696 | FunctionTemplateSpecializationInfo *getTemplateSpecializationInfo() const; |
2697 | |
2698 | /// Determines whether this function is a function template |
2699 | /// specialization or a member of a class template specialization that can |
2700 | /// be implicitly instantiated. |
2701 | bool isImplicitlyInstantiable() const; |
2702 | |
2703 | /// Determines if the given function was instantiated from a |
2704 | /// function template. |
2705 | bool isTemplateInstantiation() const; |
2706 | |
2707 | /// Retrieve the function declaration from which this function could |
2708 | /// be instantiated, if it is an instantiation (rather than a non-template |
2709 | /// or a specialization, for example). |
2710 | /// |
2711 | /// If \p ForDefinition is \c false, explicit specializations will be treated |
2712 | /// as if they were implicit instantiations. This will then find the pattern |
2713 | /// corresponding to non-definition portions of the declaration, such as |
2714 | /// default arguments and the exception specification. |
2715 | FunctionDecl * |
2716 | getTemplateInstantiationPattern(bool ForDefinition = true) const; |
2717 | |
2718 | /// Retrieve the primary template that this function template |
2719 | /// specialization either specializes or was instantiated from. |
2720 | /// |
2721 | /// If this function declaration is not a function template specialization, |
2722 | /// returns NULL. |
2723 | FunctionTemplateDecl *getPrimaryTemplate() const; |
2724 | |
2725 | /// Retrieve the template arguments used to produce this function |
2726 | /// template specialization from the primary template. |
2727 | /// |
2728 | /// If this function declaration is not a function template specialization, |
2729 | /// returns NULL. |
2730 | const TemplateArgumentList *getTemplateSpecializationArgs() const; |
2731 | |
2732 | /// Retrieve the template argument list as written in the sources, |
2733 | /// if any. |
2734 | /// |
2735 | /// If this function declaration is not a function template specialization |
2736 | /// or if it had no explicit template argument list, returns NULL. |
2737 | /// Note that it an explicit template argument list may be written empty, |
2738 | /// e.g., template<> void foo<>(char* s); |
2739 | const ASTTemplateArgumentListInfo* |
2740 | getTemplateSpecializationArgsAsWritten() const; |
2741 | |
2742 | /// Specify that this function declaration is actually a function |
2743 | /// template specialization. |
2744 | /// |
2745 | /// \param Template the function template that this function template |
2746 | /// specialization specializes. |
2747 | /// |
2748 | /// \param TemplateArgs the template arguments that produced this |
2749 | /// function template specialization from the template. |
2750 | /// |
2751 | /// \param InsertPos If non-NULL, the position in the function template |
2752 | /// specialization set where the function template specialization data will |
2753 | /// be inserted. |
2754 | /// |
2755 | /// \param TSK the kind of template specialization this is. |
2756 | /// |
2757 | /// \param TemplateArgsAsWritten location info of template arguments. |
2758 | /// |
2759 | /// \param PointOfInstantiation point at which the function template |
2760 | /// specialization was first instantiated. |
2761 | void setFunctionTemplateSpecialization(FunctionTemplateDecl *Template, |
2762 | const TemplateArgumentList *TemplateArgs, |
2763 | void *InsertPos, |
2764 | TemplateSpecializationKind TSK = TSK_ImplicitInstantiation, |
2765 | const TemplateArgumentListInfo *TemplateArgsAsWritten = nullptr, |
2766 | SourceLocation PointOfInstantiation = SourceLocation()) { |
2767 | setFunctionTemplateSpecialization(getASTContext(), Template, TemplateArgs, |
2768 | InsertPos, TSK, TemplateArgsAsWritten, |
2769 | PointOfInstantiation); |
2770 | } |
2771 | |
2772 | /// Specifies that this function declaration is actually a |
2773 | /// dependent function template specialization. |
2774 | void setDependentTemplateSpecialization(ASTContext &Context, |
2775 | const UnresolvedSetImpl &Templates, |
2776 | const TemplateArgumentListInfo &TemplateArgs); |
2777 | |
2778 | DependentFunctionTemplateSpecializationInfo * |
2779 | getDependentSpecializationInfo() const; |
2780 | |
2781 | /// Determine what kind of template instantiation this function |
2782 | /// represents. |
2783 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
2784 | |
2785 | /// Determine the kind of template specialization this function represents |
2786 | /// for the purpose of template instantiation. |
2787 | TemplateSpecializationKind |
2788 | getTemplateSpecializationKindForInstantiation() const; |
2789 | |
2790 | /// Determine what kind of template instantiation this function |
2791 | /// represents. |
2792 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
2793 | SourceLocation PointOfInstantiation = SourceLocation()); |
2794 | |
2795 | /// Retrieve the (first) point of instantiation of a function template |
2796 | /// specialization or a member of a class template specialization. |
2797 | /// |
2798 | /// \returns the first point of instantiation, if this function was |
2799 | /// instantiated from a template; otherwise, returns an invalid source |
2800 | /// location. |
2801 | SourceLocation getPointOfInstantiation() const; |
2802 | |
2803 | /// Determine whether this is or was instantiated from an out-of-line |
2804 | /// definition of a member function. |
2805 | bool isOutOfLine() const override; |
2806 | |
2807 | /// Identify a memory copying or setting function. |
2808 | /// If the given function is a memory copy or setting function, returns |
2809 | /// the corresponding Builtin ID. If the function is not a memory function, |
2810 | /// returns 0. |
2811 | unsigned getMemoryFunctionKind() const; |
2812 | |
2813 | /// Returns ODRHash of the function. This value is calculated and |
2814 | /// stored on first call, then the stored value returned on the other calls. |
2815 | unsigned getODRHash(); |
2816 | |
2817 | /// Returns cached ODRHash of the function. This must have been previously |
2818 | /// computed and stored. |
2819 | unsigned getODRHash() const; |
2820 | |
2821 | // Implement isa/cast/dyncast/etc. |
2822 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2823 | static bool classofKind(Kind K) { |
2824 | return K >= firstFunction && K <= lastFunction; |
2825 | } |
2826 | static DeclContext *castToDeclContext(const FunctionDecl *D) { |
2827 | return static_cast<DeclContext *>(const_cast<FunctionDecl*>(D)); |
2828 | } |
2829 | static FunctionDecl *castFromDeclContext(const DeclContext *DC) { |
2830 | return static_cast<FunctionDecl *>(const_cast<DeclContext*>(DC)); |
2831 | } |
2832 | }; |
2833 | |
2834 | /// Represents a member of a struct/union/class. |
2835 | class FieldDecl : public DeclaratorDecl, public Mergeable<FieldDecl> { |
2836 | unsigned BitField : 1; |
2837 | unsigned Mutable : 1; |
2838 | mutable unsigned CachedFieldIndex : 30; |
2839 | |
2840 | /// The kinds of value we can store in InitializerOrBitWidth. |
2841 | /// |
2842 | /// Note that this is compatible with InClassInitStyle except for |
2843 | /// ISK_CapturedVLAType. |
2844 | enum InitStorageKind { |
2845 | /// If the pointer is null, there's nothing special. Otherwise, |
2846 | /// this is a bitfield and the pointer is the Expr* storing the |
2847 | /// bit-width. |
2848 | ISK_NoInit = (unsigned) ICIS_NoInit, |
2849 | |
2850 | /// The pointer is an (optional due to delayed parsing) Expr* |
2851 | /// holding the copy-initializer. |
2852 | ISK_InClassCopyInit = (unsigned) ICIS_CopyInit, |
2853 | |
2854 | /// The pointer is an (optional due to delayed parsing) Expr* |
2855 | /// holding the list-initializer. |
2856 | ISK_InClassListInit = (unsigned) ICIS_ListInit, |
2857 | |
2858 | /// The pointer is a VariableArrayType* that's been captured; |
2859 | /// the enclosing context is a lambda or captured statement. |
2860 | ISK_CapturedVLAType, |
2861 | }; |
2862 | |
2863 | /// If this is a bitfield with a default member initializer, this |
2864 | /// structure is used to represent the two expressions. |
2865 | struct InitAndBitWidth { |
2866 | Expr *Init; |
2867 | Expr *BitWidth; |
2868 | }; |
2869 | |
2870 | /// Storage for either the bit-width, the in-class initializer, or |
2871 | /// both (via InitAndBitWidth), or the captured variable length array bound. |
2872 | /// |
2873 | /// If the storage kind is ISK_InClassCopyInit or |
2874 | /// ISK_InClassListInit, but the initializer is null, then this |
2875 | /// field has an in-class initializer that has not yet been parsed |
2876 | /// and attached. |
2877 | // FIXME: Tail-allocate this to reduce the size of FieldDecl in the |
2878 | // overwhelmingly common case that we have none of these things. |
2879 | llvm::PointerIntPair<void *, 2, InitStorageKind> InitStorage; |
2880 | |
2881 | protected: |
2882 | FieldDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc, |
2883 | SourceLocation IdLoc, IdentifierInfo *Id, |
2884 | QualType T, TypeSourceInfo *TInfo, Expr *BW, bool Mutable, |
2885 | InClassInitStyle InitStyle) |
2886 | : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc), |
2887 | BitField(false), Mutable(Mutable), CachedFieldIndex(0), |
2888 | InitStorage(nullptr, (InitStorageKind) InitStyle) { |
2889 | if (BW) |
2890 | setBitWidth(BW); |
2891 | } |
2892 | |
2893 | public: |
2894 | friend class ASTDeclReader; |
2895 | friend class ASTDeclWriter; |
2896 | |
2897 | static FieldDecl *Create(const ASTContext &C, DeclContext *DC, |
2898 | SourceLocation StartLoc, SourceLocation IdLoc, |
2899 | IdentifierInfo *Id, QualType T, |
2900 | TypeSourceInfo *TInfo, Expr *BW, bool Mutable, |
2901 | InClassInitStyle InitStyle); |
2902 | |
2903 | static FieldDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2904 | |
2905 | /// Returns the index of this field within its record, |
2906 | /// as appropriate for passing to ASTRecordLayout::getFieldOffset. |
2907 | unsigned getFieldIndex() const; |
2908 | |
2909 | /// Determines whether this field is mutable (C++ only). |
2910 | bool isMutable() const { return Mutable; } |
2911 | |
2912 | /// Determines whether this field is a bitfield. |
2913 | bool isBitField() const { return BitField; } |
2914 | |
2915 | /// Determines whether this is an unnamed bitfield. |
2916 | bool isUnnamedBitfield() const { return isBitField() && !getDeclName(); } |
2917 | |
2918 | /// Determines whether this field is a |
2919 | /// representative for an anonymous struct or union. Such fields are |
2920 | /// unnamed and are implicitly generated by the implementation to |
2921 | /// store the data for the anonymous union or struct. |
2922 | bool isAnonymousStructOrUnion() const; |
2923 | |
2924 | Expr *getBitWidth() const { |
2925 | if (!BitField) |
2926 | return nullptr; |
2927 | void *Ptr = InitStorage.getPointer(); |
2928 | if (getInClassInitStyle()) |
2929 | return static_cast<InitAndBitWidth*>(Ptr)->BitWidth; |
2930 | return static_cast<Expr*>(Ptr); |
2931 | } |
2932 | |
2933 | unsigned getBitWidthValue(const ASTContext &Ctx) const; |
2934 | |
2935 | /// Set the bit-field width for this member. |
2936 | // Note: used by some clients (i.e., do not remove it). |
2937 | void setBitWidth(Expr *Width) { |
2938 | assert(!hasCapturedVLAType() && !BitField &&(static_cast <bool> (!hasCapturedVLAType() && ! BitField && "bit width or captured type already set") ? void (0) : __assert_fail ("!hasCapturedVLAType() && !BitField && \"bit width or captured type already set\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2939, __extension__ __PRETTY_FUNCTION__)) |
2939 | "bit width or captured type already set")(static_cast <bool> (!hasCapturedVLAType() && ! BitField && "bit width or captured type already set") ? void (0) : __assert_fail ("!hasCapturedVLAType() && !BitField && \"bit width or captured type already set\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2939, __extension__ __PRETTY_FUNCTION__)); |
2940 | assert(Width && "no bit width specified")(static_cast <bool> (Width && "no bit width specified" ) ? void (0) : __assert_fail ("Width && \"no bit width specified\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2940, __extension__ __PRETTY_FUNCTION__)); |
2941 | InitStorage.setPointer( |
2942 | InitStorage.getInt() |
2943 | ? new (getASTContext()) |
2944 | InitAndBitWidth{getInClassInitializer(), Width} |
2945 | : static_cast<void*>(Width)); |
2946 | BitField = true; |
2947 | } |
2948 | |
2949 | /// Remove the bit-field width from this member. |
2950 | // Note: used by some clients (i.e., do not remove it). |
2951 | void removeBitWidth() { |
2952 | assert(isBitField() && "no bitfield width to remove")(static_cast <bool> (isBitField() && "no bitfield width to remove" ) ? void (0) : __assert_fail ("isBitField() && \"no bitfield width to remove\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2952, __extension__ __PRETTY_FUNCTION__)); |
2953 | InitStorage.setPointer(getInClassInitializer()); |
2954 | BitField = false; |
2955 | } |
2956 | |
2957 | /// Is this a zero-length bit-field? Such bit-fields aren't really bit-fields |
2958 | /// at all and instead act as a separator between contiguous runs of other |
2959 | /// bit-fields. |
2960 | bool isZeroLengthBitField(const ASTContext &Ctx) const; |
2961 | |
2962 | /// Determine if this field is a subobject of zero size, that is, either a |
2963 | /// zero-length bit-field or a field of empty class type with the |
2964 | /// [[no_unique_address]] attribute. |
2965 | bool isZeroSize(const ASTContext &Ctx) const; |
2966 | |
2967 | /// Get the kind of (C++11) default member initializer that this field has. |
2968 | InClassInitStyle getInClassInitStyle() const { |
2969 | InitStorageKind storageKind = InitStorage.getInt(); |
2970 | return (storageKind == ISK_CapturedVLAType |
2971 | ? ICIS_NoInit : (InClassInitStyle) storageKind); |
2972 | } |
2973 | |
2974 | /// Determine whether this member has a C++11 default member initializer. |
2975 | bool hasInClassInitializer() const { |
2976 | return getInClassInitStyle() != ICIS_NoInit; |
2977 | } |
2978 | |
2979 | /// Get the C++11 default member initializer for this member, or null if one |
2980 | /// has not been set. If a valid declaration has a default member initializer, |
2981 | /// but this returns null, then we have not parsed and attached it yet. |
2982 | Expr *getInClassInitializer() const { |
2983 | if (!hasInClassInitializer()) |
2984 | return nullptr; |
2985 | void *Ptr = InitStorage.getPointer(); |
2986 | if (BitField) |
2987 | return static_cast<InitAndBitWidth*>(Ptr)->Init; |
2988 | return static_cast<Expr*>(Ptr); |
2989 | } |
2990 | |
2991 | /// Set the C++11 in-class initializer for this member. |
2992 | void setInClassInitializer(Expr *Init) { |
2993 | assert(hasInClassInitializer() && !getInClassInitializer())(static_cast <bool> (hasInClassInitializer() && !getInClassInitializer()) ? void (0) : __assert_fail ("hasInClassInitializer() && !getInClassInitializer()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 2993, __extension__ __PRETTY_FUNCTION__)); |
2994 | if (BitField) |
2995 | static_cast<InitAndBitWidth*>(InitStorage.getPointer())->Init = Init; |
2996 | else |
2997 | InitStorage.setPointer(Init); |
2998 | } |
2999 | |
3000 | /// Remove the C++11 in-class initializer from this member. |
3001 | void removeInClassInitializer() { |
3002 | assert(hasInClassInitializer() && "no initializer to remove")(static_cast <bool> (hasInClassInitializer() && "no initializer to remove") ? void (0) : __assert_fail ("hasInClassInitializer() && \"no initializer to remove\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 3002, __extension__ __PRETTY_FUNCTION__)); |
3003 | InitStorage.setPointerAndInt(getBitWidth(), ISK_NoInit); |
3004 | } |
3005 | |
3006 | /// Determine whether this member captures the variable length array |
3007 | /// type. |
3008 | bool hasCapturedVLAType() const { |
3009 | return InitStorage.getInt() == ISK_CapturedVLAType; |
3010 | } |
3011 | |
3012 | /// Get the captured variable length array type. |
3013 | const VariableArrayType *getCapturedVLAType() const { |
3014 | return hasCapturedVLAType() ? static_cast<const VariableArrayType *>( |
3015 | InitStorage.getPointer()) |
3016 | : nullptr; |
3017 | } |
3018 | |
3019 | /// Set the captured variable length array type for this field. |
3020 | void setCapturedVLAType(const VariableArrayType *VLAType); |
3021 | |
3022 | /// Returns the parent of this field declaration, which |
3023 | /// is the struct in which this field is defined. |
3024 | /// |
3025 | /// Returns null if this is not a normal class/struct field declaration, e.g. |
3026 | /// ObjCAtDefsFieldDecl, ObjCIvarDecl. |
3027 | const RecordDecl *getParent() const { |
3028 | return dyn_cast<RecordDecl>(getDeclContext()); |
3029 | } |
3030 | |
3031 | RecordDecl *getParent() { |
3032 | return dyn_cast<RecordDecl>(getDeclContext()); |
3033 | } |
3034 | |
3035 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3036 | |
3037 | /// Retrieves the canonical declaration of this field. |
3038 | FieldDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3039 | const FieldDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3040 | |
3041 | // Implement isa/cast/dyncast/etc. |
3042 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3043 | static bool classofKind(Kind K) { return K >= firstField && K <= lastField; } |
3044 | }; |
3045 | |
3046 | /// An instance of this object exists for each enum constant |
3047 | /// that is defined. For example, in "enum X {a,b}", each of a/b are |
3048 | /// EnumConstantDecl's, X is an instance of EnumDecl, and the type of a/b is a |
3049 | /// TagType for the X EnumDecl. |
3050 | class EnumConstantDecl : public ValueDecl, public Mergeable<EnumConstantDecl> { |
3051 | Stmt *Init; // an integer constant expression |
3052 | llvm::APSInt Val; // The value. |
3053 | |
3054 | protected: |
3055 | EnumConstantDecl(DeclContext *DC, SourceLocation L, |
3056 | IdentifierInfo *Id, QualType T, Expr *E, |
3057 | const llvm::APSInt &V) |
3058 | : ValueDecl(EnumConstant, DC, L, Id, T), Init((Stmt*)E), Val(V) {} |
3059 | |
3060 | public: |
3061 | friend class StmtIteratorBase; |
3062 | |
3063 | static EnumConstantDecl *Create(ASTContext &C, EnumDecl *DC, |
3064 | SourceLocation L, IdentifierInfo *Id, |
3065 | QualType T, Expr *E, |
3066 | const llvm::APSInt &V); |
3067 | static EnumConstantDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3068 | |
3069 | const Expr *getInitExpr() const { return (const Expr*) Init; } |
3070 | Expr *getInitExpr() { return (Expr*) Init; } |
3071 | const llvm::APSInt &getInitVal() const { return Val; } |
3072 | |
3073 | void setInitExpr(Expr *E) { Init = (Stmt*) E; } |
3074 | void setInitVal(const llvm::APSInt &V) { Val = V; } |
3075 | |
3076 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3077 | |
3078 | /// Retrieves the canonical declaration of this enumerator. |
3079 | EnumConstantDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3080 | const EnumConstantDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3081 | |
3082 | // Implement isa/cast/dyncast/etc. |
3083 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3084 | static bool classofKind(Kind K) { return K == EnumConstant; } |
3085 | }; |
3086 | |
3087 | /// Represents a field injected from an anonymous union/struct into the parent |
3088 | /// scope. These are always implicit. |
3089 | class IndirectFieldDecl : public ValueDecl, |
3090 | public Mergeable<IndirectFieldDecl> { |
3091 | NamedDecl **Chaining; |
3092 | unsigned ChainingSize; |
3093 | |
3094 | IndirectFieldDecl(ASTContext &C, DeclContext *DC, SourceLocation L, |
3095 | DeclarationName N, QualType T, |
3096 | MutableArrayRef<NamedDecl *> CH); |
3097 | |
3098 | void anchor() override; |
3099 | |
3100 | public: |
3101 | friend class ASTDeclReader; |
3102 | |
3103 | static IndirectFieldDecl *Create(ASTContext &C, DeclContext *DC, |
3104 | SourceLocation L, IdentifierInfo *Id, |
3105 | QualType T, llvm::MutableArrayRef<NamedDecl *> CH); |
3106 | |
3107 | static IndirectFieldDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3108 | |
3109 | using chain_iterator = ArrayRef<NamedDecl *>::const_iterator; |
3110 | |
3111 | ArrayRef<NamedDecl *> chain() const { |
3112 | return llvm::makeArrayRef(Chaining, ChainingSize); |
3113 | } |
3114 | chain_iterator chain_begin() const { return chain().begin(); } |
3115 | chain_iterator chain_end() const { return chain().end(); } |
3116 | |
3117 | unsigned getChainingSize() const { return ChainingSize; } |
3118 | |
3119 | FieldDecl *getAnonField() const { |
3120 | assert(chain().size() >= 2)(static_cast <bool> (chain().size() >= 2) ? void (0) : __assert_fail ("chain().size() >= 2", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 3120, __extension__ __PRETTY_FUNCTION__)); |
3121 | return cast<FieldDecl>(chain().back()); |
3122 | } |
3123 | |
3124 | VarDecl *getVarDecl() const { |
3125 | assert(chain().size() >= 2)(static_cast <bool> (chain().size() >= 2) ? void (0) : __assert_fail ("chain().size() >= 2", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 3125, __extension__ __PRETTY_FUNCTION__)); |
3126 | return dyn_cast<VarDecl>(chain().front()); |
3127 | } |
3128 | |
3129 | IndirectFieldDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3130 | const IndirectFieldDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3131 | |
3132 | // Implement isa/cast/dyncast/etc. |
3133 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3134 | static bool classofKind(Kind K) { return K == IndirectField; } |
3135 | }; |
3136 | |
3137 | /// Represents a declaration of a type. |
3138 | class TypeDecl : public NamedDecl { |
3139 | friend class ASTContext; |
3140 | |
3141 | /// This indicates the Type object that represents |
3142 | /// this TypeDecl. It is a cache maintained by |
3143 | /// ASTContext::getTypedefType, ASTContext::getTagDeclType, and |
3144 | /// ASTContext::getTemplateTypeParmType, and TemplateTypeParmDecl. |
3145 | mutable const Type *TypeForDecl = nullptr; |
3146 | |
3147 | /// The start of the source range for this declaration. |
3148 | SourceLocation LocStart; |
3149 | |
3150 | void anchor() override; |
3151 | |
3152 | protected: |
3153 | TypeDecl(Kind DK, DeclContext *DC, SourceLocation L, IdentifierInfo *Id, |
3154 | SourceLocation StartL = SourceLocation()) |
3155 | : NamedDecl(DK, DC, L, Id), LocStart(StartL) {} |
3156 | |
3157 | public: |
3158 | // Low-level accessor. If you just want the type defined by this node, |
3159 | // check out ASTContext::getTypeDeclType or one of |
3160 | // ASTContext::getTypedefType, ASTContext::getRecordType, etc. if you |
3161 | // already know the specific kind of node this is. |
3162 | const Type *getTypeForDecl() const { return TypeForDecl; } |
3163 | void setTypeForDecl(const Type *TD) { TypeForDecl = TD; } |
3164 | |
3165 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LocStart; } |
3166 | void setLocStart(SourceLocation L) { LocStart = L; } |
3167 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
3168 | if (LocStart.isValid()) |
3169 | return SourceRange(LocStart, getLocation()); |
3170 | else |
3171 | return SourceRange(getLocation()); |
3172 | } |
3173 | |
3174 | // Implement isa/cast/dyncast/etc. |
3175 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3176 | static bool classofKind(Kind K) { return K >= firstType && K <= lastType; } |
3177 | }; |
3178 | |
3179 | /// Base class for declarations which introduce a typedef-name. |
3180 | class TypedefNameDecl : public TypeDecl, public Redeclarable<TypedefNameDecl> { |
3181 | struct alignas(8) ModedTInfo { |
3182 | TypeSourceInfo *first; |
3183 | QualType second; |
3184 | }; |
3185 | |
3186 | /// If int part is 0, we have not computed IsTransparentTag. |
3187 | /// Otherwise, IsTransparentTag is (getInt() >> 1). |
3188 | mutable llvm::PointerIntPair< |
3189 | llvm::PointerUnion<TypeSourceInfo *, ModedTInfo *>, 2> |
3190 | MaybeModedTInfo; |
3191 | |
3192 | void anchor() override; |
3193 | |
3194 | protected: |
3195 | TypedefNameDecl(Kind DK, ASTContext &C, DeclContext *DC, |
3196 | SourceLocation StartLoc, SourceLocation IdLoc, |
3197 | IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3198 | : TypeDecl(DK, DC, IdLoc, Id, StartLoc), redeclarable_base(C), |
3199 | MaybeModedTInfo(TInfo, 0) {} |
3200 | |
3201 | using redeclarable_base = Redeclarable<TypedefNameDecl>; |
3202 | |
3203 | TypedefNameDecl *getNextRedeclarationImpl() override { |
3204 | return getNextRedeclaration(); |
3205 | } |
3206 | |
3207 | TypedefNameDecl *getPreviousDeclImpl() override { |
3208 | return getPreviousDecl(); |
3209 | } |
3210 | |
3211 | TypedefNameDecl *getMostRecentDeclImpl() override { |
3212 | return getMostRecentDecl(); |
3213 | } |
3214 | |
3215 | public: |
3216 | using redecl_range = redeclarable_base::redecl_range; |
3217 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3218 | |
3219 | using redeclarable_base::redecls_begin; |
3220 | using redeclarable_base::redecls_end; |
3221 | using redeclarable_base::redecls; |
3222 | using redeclarable_base::getPreviousDecl; |
3223 | using redeclarable_base::getMostRecentDecl; |
3224 | using redeclarable_base::isFirstDecl; |
3225 | |
3226 | bool isModed() const { |
3227 | return MaybeModedTInfo.getPointer().is<ModedTInfo *>(); |
3228 | } |
3229 | |
3230 | TypeSourceInfo *getTypeSourceInfo() const { |
3231 | return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->first |
3232 | : MaybeModedTInfo.getPointer().get<TypeSourceInfo *>(); |
3233 | } |
3234 | |
3235 | QualType getUnderlyingType() const { |
3236 | return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->second |
3237 | : MaybeModedTInfo.getPointer() |
3238 | .get<TypeSourceInfo *>() |
3239 | ->getType(); |
3240 | } |
3241 | |
3242 | void setTypeSourceInfo(TypeSourceInfo *newType) { |
3243 | MaybeModedTInfo.setPointer(newType); |
3244 | } |
3245 | |
3246 | void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy) { |
3247 | MaybeModedTInfo.setPointer(new (getASTContext(), 8) |
3248 | ModedTInfo({unmodedTSI, modedTy})); |
3249 | } |
3250 | |
3251 | /// Retrieves the canonical declaration of this typedef-name. |
3252 | TypedefNameDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3253 | const TypedefNameDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3254 | |
3255 | /// Retrieves the tag declaration for which this is the typedef name for |
3256 | /// linkage purposes, if any. |
3257 | /// |
3258 | /// \param AnyRedecl Look for the tag declaration in any redeclaration of |
3259 | /// this typedef declaration. |
3260 | TagDecl *getAnonDeclWithTypedefName(bool AnyRedecl = false) const; |
3261 | |
3262 | /// Determines if this typedef shares a name and spelling location with its |
3263 | /// underlying tag type, as is the case with the NS_ENUM macro. |
3264 | bool isTransparentTag() const { |
3265 | if (MaybeModedTInfo.getInt()) |
3266 | return MaybeModedTInfo.getInt() & 0x2; |
3267 | return isTransparentTagSlow(); |
3268 | } |
3269 | |
3270 | // Implement isa/cast/dyncast/etc. |
3271 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3272 | static bool classofKind(Kind K) { |
3273 | return K >= firstTypedefName && K <= lastTypedefName; |
3274 | } |
3275 | |
3276 | private: |
3277 | bool isTransparentTagSlow() const; |
3278 | }; |
3279 | |
3280 | /// Represents the declaration of a typedef-name via the 'typedef' |
3281 | /// type specifier. |
3282 | class TypedefDecl : public TypedefNameDecl { |
3283 | TypedefDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3284 | SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3285 | : TypedefNameDecl(Typedef, C, DC, StartLoc, IdLoc, Id, TInfo) {} |
3286 | |
3287 | public: |
3288 | static TypedefDecl *Create(ASTContext &C, DeclContext *DC, |
3289 | SourceLocation StartLoc, SourceLocation IdLoc, |
3290 | IdentifierInfo *Id, TypeSourceInfo *TInfo); |
3291 | static TypedefDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3292 | |
3293 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3294 | |
3295 | // Implement isa/cast/dyncast/etc. |
3296 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3297 | static bool classofKind(Kind K) { return K == Typedef; } |
3298 | }; |
3299 | |
3300 | /// Represents the declaration of a typedef-name via a C++11 |
3301 | /// alias-declaration. |
3302 | class TypeAliasDecl : public TypedefNameDecl { |
3303 | /// The template for which this is the pattern, if any. |
3304 | TypeAliasTemplateDecl *Template; |
3305 | |
3306 | TypeAliasDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3307 | SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3308 | : TypedefNameDecl(TypeAlias, C, DC, StartLoc, IdLoc, Id, TInfo), |
3309 | Template(nullptr) {} |
3310 | |
3311 | public: |
3312 | static TypeAliasDecl *Create(ASTContext &C, DeclContext *DC, |
3313 | SourceLocation StartLoc, SourceLocation IdLoc, |
3314 | IdentifierInfo *Id, TypeSourceInfo *TInfo); |
3315 | static TypeAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3316 | |
3317 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3318 | |
3319 | TypeAliasTemplateDecl *getDescribedAliasTemplate() const { return Template; } |
3320 | void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT) { Template = TAT; } |
3321 | |
3322 | // Implement isa/cast/dyncast/etc. |
3323 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3324 | static bool classofKind(Kind K) { return K == TypeAlias; } |
3325 | }; |
3326 | |
3327 | /// Represents the declaration of a struct/union/class/enum. |
3328 | class TagDecl : public TypeDecl, |
3329 | public DeclContext, |
3330 | public Redeclarable<TagDecl> { |
3331 | // This class stores some data in DeclContext::TagDeclBits |
3332 | // to save some space. Use the provided accessors to access it. |
3333 | public: |
3334 | // This is really ugly. |
3335 | using TagKind = TagTypeKind; |
3336 | |
3337 | private: |
3338 | SourceRange BraceRange; |
3339 | |
3340 | // A struct representing syntactic qualifier info, |
3341 | // to be used for the (uncommon) case of out-of-line declarations. |
3342 | using ExtInfo = QualifierInfo; |
3343 | |
3344 | /// If the (out-of-line) tag declaration name |
3345 | /// is qualified, it points to the qualifier info (nns and range); |
3346 | /// otherwise, if the tag declaration is anonymous and it is part of |
3347 | /// a typedef or alias, it points to the TypedefNameDecl (used for mangling); |
3348 | /// otherwise, if the tag declaration is anonymous and it is used as a |
3349 | /// declaration specifier for variables, it points to the first VarDecl (used |
3350 | /// for mangling); |
3351 | /// otherwise, it is a null (TypedefNameDecl) pointer. |
3352 | llvm::PointerUnion<TypedefNameDecl *, ExtInfo *> TypedefNameDeclOrQualifier; |
3353 | |
3354 | bool hasExtInfo() const { return TypedefNameDeclOrQualifier.is<ExtInfo *>(); } |
3355 | ExtInfo *getExtInfo() { return TypedefNameDeclOrQualifier.get<ExtInfo *>(); } |
3356 | const ExtInfo *getExtInfo() const { |
3357 | return TypedefNameDeclOrQualifier.get<ExtInfo *>(); |
3358 | } |
3359 | |
3360 | protected: |
3361 | TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, |
3362 | SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl, |
3363 | SourceLocation StartL); |
3364 | |
3365 | using redeclarable_base = Redeclarable<TagDecl>; |
3366 | |
3367 | TagDecl *getNextRedeclarationImpl() override { |
3368 | return getNextRedeclaration(); |
3369 | } |
3370 | |
3371 | TagDecl *getPreviousDeclImpl() override { |
3372 | return getPreviousDecl(); |
3373 | } |
3374 | |
3375 | TagDecl *getMostRecentDeclImpl() override { |
3376 | return getMostRecentDecl(); |
3377 | } |
3378 | |
3379 | /// Completes the definition of this tag declaration. |
3380 | /// |
3381 | /// This is a helper function for derived classes. |
3382 | void completeDefinition(); |
3383 | |
3384 | /// True if this decl is currently being defined. |
3385 | void setBeingDefined(bool V = true) { TagDeclBits.IsBeingDefined = V; } |
3386 | |
3387 | /// Indicates whether it is possible for declarations of this kind |
3388 | /// to have an out-of-date definition. |
3389 | /// |
3390 | /// This option is only enabled when modules are enabled. |
3391 | void setMayHaveOutOfDateDef(bool V = true) { |
3392 | TagDeclBits.MayHaveOutOfDateDef = V; |
3393 | } |
3394 | |
3395 | public: |
3396 | friend class ASTDeclReader; |
3397 | friend class ASTDeclWriter; |
3398 | |
3399 | using redecl_range = redeclarable_base::redecl_range; |
3400 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3401 | |
3402 | using redeclarable_base::redecls_begin; |
3403 | using redeclarable_base::redecls_end; |
3404 | using redeclarable_base::redecls; |
3405 | using redeclarable_base::getPreviousDecl; |
3406 | using redeclarable_base::getMostRecentDecl; |
3407 | using redeclarable_base::isFirstDecl; |
3408 | |
3409 | SourceRange getBraceRange() const { return BraceRange; } |
3410 | void setBraceRange(SourceRange R) { BraceRange = R; } |
3411 | |
3412 | /// Return SourceLocation representing start of source |
3413 | /// range ignoring outer template declarations. |
3414 | SourceLocation getInnerLocStart() const { return getBeginLoc(); } |
3415 | |
3416 | /// Return SourceLocation representing start of source |
3417 | /// range taking into account any outer template declarations. |
3418 | SourceLocation getOuterLocStart() const; |
3419 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3420 | |
3421 | TagDecl *getCanonicalDecl() override; |
3422 | const TagDecl *getCanonicalDecl() const { |
3423 | return const_cast<TagDecl*>(this)->getCanonicalDecl(); |
3424 | } |
3425 | |
3426 | /// Return true if this declaration is a completion definition of the type. |
3427 | /// Provided for consistency. |
3428 | bool isThisDeclarationADefinition() const { |
3429 | return isCompleteDefinition(); |
3430 | } |
3431 | |
3432 | /// Return true if this decl has its body fully specified. |
3433 | bool isCompleteDefinition() const { return TagDeclBits.IsCompleteDefinition; } |
3434 | |
3435 | /// True if this decl has its body fully specified. |
3436 | void setCompleteDefinition(bool V = true) { |
3437 | TagDeclBits.IsCompleteDefinition = V; |
3438 | } |
3439 | |
3440 | /// Return true if this complete decl is |
3441 | /// required to be complete for some existing use. |
3442 | bool isCompleteDefinitionRequired() const { |
3443 | return TagDeclBits.IsCompleteDefinitionRequired; |
3444 | } |
3445 | |
3446 | /// True if this complete decl is |
3447 | /// required to be complete for some existing use. |
3448 | void setCompleteDefinitionRequired(bool V = true) { |
3449 | TagDeclBits.IsCompleteDefinitionRequired = V; |
3450 | } |
3451 | |
3452 | /// Return true if this decl is currently being defined. |
3453 | bool isBeingDefined() const { return TagDeclBits.IsBeingDefined; } |
3454 | |
3455 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
3456 | /// for the very first time) in the syntax of a declarator. |
3457 | bool isEmbeddedInDeclarator() const { |
3458 | return TagDeclBits.IsEmbeddedInDeclarator; |
3459 | } |
3460 | |
3461 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
3462 | /// for the very first time) in the syntax of a declarator. |
3463 | void setEmbeddedInDeclarator(bool isInDeclarator) { |
3464 | TagDeclBits.IsEmbeddedInDeclarator = isInDeclarator; |
3465 | } |
3466 | |
3467 | /// True if this tag is free standing, e.g. "struct foo;". |
3468 | bool isFreeStanding() const { return TagDeclBits.IsFreeStanding; } |
3469 | |
3470 | /// True if this tag is free standing, e.g. "struct foo;". |
3471 | void setFreeStanding(bool isFreeStanding = true) { |
3472 | TagDeclBits.IsFreeStanding = isFreeStanding; |
3473 | } |
3474 | |
3475 | /// Indicates whether it is possible for declarations of this kind |
3476 | /// to have an out-of-date definition. |
3477 | /// |
3478 | /// This option is only enabled when modules are enabled. |
3479 | bool mayHaveOutOfDateDef() const { return TagDeclBits.MayHaveOutOfDateDef; } |
3480 | |
3481 | /// Whether this declaration declares a type that is |
3482 | /// dependent, i.e., a type that somehow depends on template |
3483 | /// parameters. |
3484 | bool isDependentType() const { return isDependentContext(); } |
3485 | |
3486 | /// Starts the definition of this tag declaration. |
3487 | /// |
3488 | /// This method should be invoked at the beginning of the definition |
3489 | /// of this tag declaration. It will set the tag type into a state |
3490 | /// where it is in the process of being defined. |
3491 | void startDefinition(); |
3492 | |
3493 | /// Returns the TagDecl that actually defines this |
3494 | /// struct/union/class/enum. When determining whether or not a |
3495 | /// struct/union/class/enum has a definition, one should use this |
3496 | /// method as opposed to 'isDefinition'. 'isDefinition' indicates |
3497 | /// whether or not a specific TagDecl is defining declaration, not |
3498 | /// whether or not the struct/union/class/enum type is defined. |
3499 | /// This method returns NULL if there is no TagDecl that defines |
3500 | /// the struct/union/class/enum. |
3501 | TagDecl *getDefinition() const; |
3502 | |
3503 | StringRef getKindName() const { |
3504 | return TypeWithKeyword::getTagTypeKindName(getTagKind()); |
3505 | } |
3506 | |
3507 | TagKind getTagKind() const { |
3508 | return static_cast<TagKind>(TagDeclBits.TagDeclKind); |
3509 | } |
3510 | |
3511 | void setTagKind(TagKind TK) { TagDeclBits.TagDeclKind = TK; } |
3512 | |
3513 | bool isStruct() const { return getTagKind() == TTK_Struct; } |
3514 | bool isInterface() const { return getTagKind() == TTK_Interface; } |
3515 | bool isClass() const { return getTagKind() == TTK_Class; } |
3516 | bool isUnion() const { return getTagKind() == TTK_Union; } |
3517 | bool isEnum() const { return getTagKind() == TTK_Enum; } |
3518 | |
3519 | /// Is this tag type named, either directly or via being defined in |
3520 | /// a typedef of this type? |
3521 | /// |
3522 | /// C++11 [basic.link]p8: |
3523 | /// A type is said to have linkage if and only if: |
3524 | /// - it is a class or enumeration type that is named (or has a |
3525 | /// name for linkage purposes) and the name has linkage; ... |
3526 | /// C++11 [dcl.typedef]p9: |
3527 | /// If the typedef declaration defines an unnamed class (or enum), |
3528 | /// the first typedef-name declared by the declaration to be that |
3529 | /// class type (or enum type) is used to denote the class type (or |
3530 | /// enum type) for linkage purposes only. |
3531 | /// |
3532 | /// C does not have an analogous rule, but the same concept is |
3533 | /// nonetheless useful in some places. |
3534 | bool hasNameForLinkage() const { |
3535 | return (getDeclName() || getTypedefNameForAnonDecl()); |
3536 | } |
3537 | |
3538 | TypedefNameDecl *getTypedefNameForAnonDecl() const { |
3539 | return hasExtInfo() ? nullptr |
3540 | : TypedefNameDeclOrQualifier.get<TypedefNameDecl *>(); |
3541 | } |
3542 | |
3543 | void setTypedefNameForAnonDecl(TypedefNameDecl *TDD); |
3544 | |
3545 | /// Retrieve the nested-name-specifier that qualifies the name of this |
3546 | /// declaration, if it was present in the source. |
3547 | NestedNameSpecifier *getQualifier() const { |
3548 | return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier() |
3549 | : nullptr; |
3550 | } |
3551 | |
3552 | /// Retrieve the nested-name-specifier (with source-location |
3553 | /// information) that qualifies the name of this declaration, if it was |
3554 | /// present in the source. |
3555 | NestedNameSpecifierLoc getQualifierLoc() const { |
3556 | return hasExtInfo() ? getExtInfo()->QualifierLoc |
3557 | : NestedNameSpecifierLoc(); |
3558 | } |
3559 | |
3560 | void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc); |
3561 | |
3562 | unsigned getNumTemplateParameterLists() const { |
3563 | return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0; |
3564 | } |
3565 | |
3566 | TemplateParameterList *getTemplateParameterList(unsigned i) const { |
3567 | assert(i < getNumTemplateParameterLists())(static_cast <bool> (i < getNumTemplateParameterLists ()) ? void (0) : __assert_fail ("i < getNumTemplateParameterLists()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 3567, __extension__ __PRETTY_FUNCTION__)); |
3568 | return getExtInfo()->TemplParamLists[i]; |
3569 | } |
3570 | |
3571 | void setTemplateParameterListsInfo(ASTContext &Context, |
3572 | ArrayRef<TemplateParameterList *> TPLists); |
3573 | |
3574 | // Implement isa/cast/dyncast/etc. |
3575 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3576 | static bool classofKind(Kind K) { return K >= firstTag && K <= lastTag; } |
3577 | |
3578 | static DeclContext *castToDeclContext(const TagDecl *D) { |
3579 | return static_cast<DeclContext *>(const_cast<TagDecl*>(D)); |
3580 | } |
3581 | |
3582 | static TagDecl *castFromDeclContext(const DeclContext *DC) { |
3583 | return static_cast<TagDecl *>(const_cast<DeclContext*>(DC)); |
3584 | } |
3585 | }; |
3586 | |
3587 | /// Represents an enum. In C++11, enums can be forward-declared |
3588 | /// with a fixed underlying type, and in C we allow them to be forward-declared |
3589 | /// with no underlying type as an extension. |
3590 | class EnumDecl : public TagDecl { |
3591 | // This class stores some data in DeclContext::EnumDeclBits |
3592 | // to save some space. Use the provided accessors to access it. |
3593 | |
3594 | /// This represent the integer type that the enum corresponds |
3595 | /// to for code generation purposes. Note that the enumerator constants may |
3596 | /// have a different type than this does. |
3597 | /// |
3598 | /// If the underlying integer type was explicitly stated in the source |
3599 | /// code, this is a TypeSourceInfo* for that type. Otherwise this type |
3600 | /// was automatically deduced somehow, and this is a Type*. |
3601 | /// |
3602 | /// Normally if IsFixed(), this would contain a TypeSourceInfo*, but in |
3603 | /// some cases it won't. |
3604 | /// |
3605 | /// The underlying type of an enumeration never has any qualifiers, so |
3606 | /// we can get away with just storing a raw Type*, and thus save an |
3607 | /// extra pointer when TypeSourceInfo is needed. |
3608 | llvm::PointerUnion<const Type *, TypeSourceInfo *> IntegerType; |
3609 | |
3610 | /// The integer type that values of this type should |
3611 | /// promote to. In C, enumerators are generally of an integer type |
3612 | /// directly, but gcc-style large enumerators (and all enumerators |
3613 | /// in C++) are of the enum type instead. |
3614 | QualType PromotionType; |
3615 | |
3616 | /// If this enumeration is an instantiation of a member enumeration |
3617 | /// of a class template specialization, this is the member specialization |
3618 | /// information. |
3619 | MemberSpecializationInfo *SpecializationInfo = nullptr; |
3620 | |
3621 | /// Store the ODRHash after first calculation. |
3622 | /// The corresponding flag HasODRHash is in EnumDeclBits |
3623 | /// and can be accessed with the provided accessors. |
3624 | unsigned ODRHash; |
3625 | |
3626 | EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3627 | SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl, |
3628 | bool Scoped, bool ScopedUsingClassTag, bool Fixed); |
3629 | |
3630 | void anchor() override; |
3631 | |
3632 | void setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, |
3633 | TemplateSpecializationKind TSK); |
3634 | |
3635 | /// Sets the width in bits required to store all the |
3636 | /// non-negative enumerators of this enum. |
3637 | void setNumPositiveBits(unsigned Num) { |
3638 | EnumDeclBits.NumPositiveBits = Num; |
3639 | assert(EnumDeclBits.NumPositiveBits == Num && "can't store this bitcount")(static_cast <bool> (EnumDeclBits.NumPositiveBits == Num && "can't store this bitcount") ? void (0) : __assert_fail ("EnumDeclBits.NumPositiveBits == Num && \"can't store this bitcount\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 3639, __extension__ __PRETTY_FUNCTION__)); |
3640 | } |
3641 | |
3642 | /// Returns the width in bits required to store all the |
3643 | /// negative enumerators of this enum. (see getNumNegativeBits) |
3644 | void setNumNegativeBits(unsigned Num) { EnumDeclBits.NumNegativeBits = Num; } |
3645 | |
3646 | public: |
3647 | /// True if this tag declaration is a scoped enumeration. Only |
3648 | /// possible in C++11 mode. |
3649 | void setScoped(bool Scoped = true) { EnumDeclBits.IsScoped = Scoped; } |
3650 | |
3651 | /// If this tag declaration is a scoped enum, |
3652 | /// then this is true if the scoped enum was declared using the class |
3653 | /// tag, false if it was declared with the struct tag. No meaning is |
3654 | /// associated if this tag declaration is not a scoped enum. |
3655 | void setScopedUsingClassTag(bool ScopedUCT = true) { |
3656 | EnumDeclBits.IsScopedUsingClassTag = ScopedUCT; |
3657 | } |
3658 | |
3659 | /// True if this is an Objective-C, C++11, or |
3660 | /// Microsoft-style enumeration with a fixed underlying type. |
3661 | void setFixed(bool Fixed = true) { EnumDeclBits.IsFixed = Fixed; } |
3662 | |
3663 | private: |
3664 | /// True if a valid hash is stored in ODRHash. |
3665 | bool hasODRHash() const { return EnumDeclBits.HasODRHash; } |
3666 | void setHasODRHash(bool Hash = true) { EnumDeclBits.HasODRHash = Hash; } |
3667 | |
3668 | public: |
3669 | friend class ASTDeclReader; |
3670 | |
3671 | EnumDecl *getCanonicalDecl() override { |
3672 | return cast<EnumDecl>(TagDecl::getCanonicalDecl()); |
3673 | } |
3674 | const EnumDecl *getCanonicalDecl() const { |
3675 | return const_cast<EnumDecl*>(this)->getCanonicalDecl(); |
3676 | } |
3677 | |
3678 | EnumDecl *getPreviousDecl() { |
3679 | return cast_or_null<EnumDecl>( |
3680 | static_cast<TagDecl *>(this)->getPreviousDecl()); |
3681 | } |
3682 | const EnumDecl *getPreviousDecl() const { |
3683 | return const_cast<EnumDecl*>(this)->getPreviousDecl(); |
3684 | } |
3685 | |
3686 | EnumDecl *getMostRecentDecl() { |
3687 | return cast<EnumDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl()); |
3688 | } |
3689 | const EnumDecl *getMostRecentDecl() const { |
3690 | return const_cast<EnumDecl*>(this)->getMostRecentDecl(); |
3691 | } |
3692 | |
3693 | EnumDecl *getDefinition() const { |
3694 | return cast_or_null<EnumDecl>(TagDecl::getDefinition()); |
3695 | } |
3696 | |
3697 | static EnumDecl *Create(ASTContext &C, DeclContext *DC, |
3698 | SourceLocation StartLoc, SourceLocation IdLoc, |
3699 | IdentifierInfo *Id, EnumDecl *PrevDecl, |
3700 | bool IsScoped, bool IsScopedUsingClassTag, |
3701 | bool IsFixed); |
3702 | static EnumDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3703 | |
3704 | /// When created, the EnumDecl corresponds to a |
3705 | /// forward-declared enum. This method is used to mark the |
3706 | /// declaration as being defined; its enumerators have already been |
3707 | /// added (via DeclContext::addDecl). NewType is the new underlying |
3708 | /// type of the enumeration type. |
3709 | void completeDefinition(QualType NewType, |
3710 | QualType PromotionType, |
3711 | unsigned NumPositiveBits, |
3712 | unsigned NumNegativeBits); |
3713 | |
3714 | // Iterates through the enumerators of this enumeration. |
3715 | using enumerator_iterator = specific_decl_iterator<EnumConstantDecl>; |
3716 | using enumerator_range = |
3717 | llvm::iterator_range<specific_decl_iterator<EnumConstantDecl>>; |
3718 | |
3719 | enumerator_range enumerators() const { |
3720 | return enumerator_range(enumerator_begin(), enumerator_end()); |
3721 | } |
3722 | |
3723 | enumerator_iterator enumerator_begin() const { |
3724 | const EnumDecl *E = getDefinition(); |
3725 | if (!E) |
3726 | E = this; |
3727 | return enumerator_iterator(E->decls_begin()); |
3728 | } |
3729 | |
3730 | enumerator_iterator enumerator_end() const { |
3731 | const EnumDecl *E = getDefinition(); |
3732 | if (!E) |
3733 | E = this; |
3734 | return enumerator_iterator(E->decls_end()); |
3735 | } |
3736 | |
3737 | /// Return the integer type that enumerators should promote to. |
3738 | QualType getPromotionType() const { return PromotionType; } |
3739 | |
3740 | /// Set the promotion type. |
3741 | void setPromotionType(QualType T) { PromotionType = T; } |
3742 | |
3743 | /// Return the integer type this enum decl corresponds to. |
3744 | /// This returns a null QualType for an enum forward definition with no fixed |
3745 | /// underlying type. |
3746 | QualType getIntegerType() const { |
3747 | if (!IntegerType) |
3748 | return QualType(); |
3749 | if (const Type *T = IntegerType.dyn_cast<const Type*>()) |
3750 | return QualType(T, 0); |
3751 | return IntegerType.get<TypeSourceInfo*>()->getType().getUnqualifiedType(); |
3752 | } |
3753 | |
3754 | /// Set the underlying integer type. |
3755 | void setIntegerType(QualType T) { IntegerType = T.getTypePtrOrNull(); } |
3756 | |
3757 | /// Set the underlying integer type source info. |
3758 | void setIntegerTypeSourceInfo(TypeSourceInfo *TInfo) { IntegerType = TInfo; } |
3759 | |
3760 | /// Return the type source info for the underlying integer type, |
3761 | /// if no type source info exists, return 0. |
3762 | TypeSourceInfo *getIntegerTypeSourceInfo() const { |
3763 | return IntegerType.dyn_cast<TypeSourceInfo*>(); |
3764 | } |
3765 | |
3766 | /// Retrieve the source range that covers the underlying type if |
3767 | /// specified. |
3768 | SourceRange getIntegerTypeRange() const LLVM_READONLY__attribute__((__pure__)); |
3769 | |
3770 | /// Returns the width in bits required to store all the |
3771 | /// non-negative enumerators of this enum. |
3772 | unsigned getNumPositiveBits() const { return EnumDeclBits.NumPositiveBits; } |
3773 | |
3774 | /// Returns the width in bits required to store all the |
3775 | /// negative enumerators of this enum. These widths include |
3776 | /// the rightmost leading 1; that is: |
3777 | /// |
3778 | /// MOST NEGATIVE ENUMERATOR PATTERN NUM NEGATIVE BITS |
3779 | /// ------------------------ ------- ----------------- |
3780 | /// -1 1111111 1 |
3781 | /// -10 1110110 5 |
3782 | /// -101 1001011 8 |
3783 | unsigned getNumNegativeBits() const { return EnumDeclBits.NumNegativeBits; } |
3784 | |
3785 | /// Returns true if this is a C++11 scoped enumeration. |
3786 | bool isScoped() const { return EnumDeclBits.IsScoped; } |
3787 | |
3788 | /// Returns true if this is a C++11 scoped enumeration. |
3789 | bool isScopedUsingClassTag() const { |
3790 | return EnumDeclBits.IsScopedUsingClassTag; |
3791 | } |
3792 | |
3793 | /// Returns true if this is an Objective-C, C++11, or |
3794 | /// Microsoft-style enumeration with a fixed underlying type. |
3795 | bool isFixed() const { return EnumDeclBits.IsFixed; } |
3796 | |
3797 | unsigned getODRHash(); |
3798 | |
3799 | /// Returns true if this can be considered a complete type. |
3800 | bool isComplete() const { |
3801 | // IntegerType is set for fixed type enums and non-fixed but implicitly |
3802 | // int-sized Microsoft enums. |
3803 | return isCompleteDefinition() || IntegerType; |
3804 | } |
3805 | |
3806 | /// Returns true if this enum is either annotated with |
3807 | /// enum_extensibility(closed) or isn't annotated with enum_extensibility. |
3808 | bool isClosed() const; |
3809 | |
3810 | /// Returns true if this enum is annotated with flag_enum and isn't annotated |
3811 | /// with enum_extensibility(open). |
3812 | bool isClosedFlag() const; |
3813 | |
3814 | /// Returns true if this enum is annotated with neither flag_enum nor |
3815 | /// enum_extensibility(open). |
3816 | bool isClosedNonFlag() const; |
3817 | |
3818 | /// Retrieve the enum definition from which this enumeration could |
3819 | /// be instantiated, if it is an instantiation (rather than a non-template). |
3820 | EnumDecl *getTemplateInstantiationPattern() const; |
3821 | |
3822 | /// Returns the enumeration (declared within the template) |
3823 | /// from which this enumeration type was instantiated, or NULL if |
3824 | /// this enumeration was not instantiated from any template. |
3825 | EnumDecl *getInstantiatedFromMemberEnum() const; |
3826 | |
3827 | /// If this enumeration is a member of a specialization of a |
3828 | /// templated class, determine what kind of template specialization |
3829 | /// or instantiation this is. |
3830 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
3831 | |
3832 | /// For an enumeration member that was instantiated from a member |
3833 | /// enumeration of a templated class, set the template specialiation kind. |
3834 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
3835 | SourceLocation PointOfInstantiation = SourceLocation()); |
3836 | |
3837 | /// If this enumeration is an instantiation of a member enumeration of |
3838 | /// a class template specialization, retrieves the member specialization |
3839 | /// information. |
3840 | MemberSpecializationInfo *getMemberSpecializationInfo() const { |
3841 | return SpecializationInfo; |
3842 | } |
3843 | |
3844 | /// Specify that this enumeration is an instantiation of the |
3845 | /// member enumeration ED. |
3846 | void setInstantiationOfMemberEnum(EnumDecl *ED, |
3847 | TemplateSpecializationKind TSK) { |
3848 | setInstantiationOfMemberEnum(getASTContext(), ED, TSK); |
3849 | } |
3850 | |
3851 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3852 | static bool classofKind(Kind K) { return K == Enum; } |
3853 | }; |
3854 | |
3855 | /// Represents a struct/union/class. For example: |
3856 | /// struct X; // Forward declaration, no "body". |
3857 | /// union Y { int A, B; }; // Has body with members A and B (FieldDecls). |
3858 | /// This decl will be marked invalid if *any* members are invalid. |
3859 | class RecordDecl : public TagDecl { |
3860 | // This class stores some data in DeclContext::RecordDeclBits |
3861 | // to save some space. Use the provided accessors to access it. |
3862 | public: |
3863 | friend class DeclContext; |
3864 | /// Enum that represents the different ways arguments are passed to and |
3865 | /// returned from function calls. This takes into account the target-specific |
3866 | /// and version-specific rules along with the rules determined by the |
3867 | /// language. |
3868 | enum ArgPassingKind : unsigned { |
3869 | /// The argument of this type can be passed directly in registers. |
3870 | APK_CanPassInRegs, |
3871 | |
3872 | /// The argument of this type cannot be passed directly in registers. |
3873 | /// Records containing this type as a subobject are not forced to be passed |
3874 | /// indirectly. This value is used only in C++. This value is required by |
3875 | /// C++ because, in uncommon situations, it is possible for a class to have |
3876 | /// only trivial copy/move constructors even when one of its subobjects has |
3877 | /// a non-trivial copy/move constructor (if e.g. the corresponding copy/move |
3878 | /// constructor in the derived class is deleted). |
3879 | APK_CannotPassInRegs, |
3880 | |
3881 | /// The argument of this type cannot be passed directly in registers. |
3882 | /// Records containing this type as a subobject are forced to be passed |
3883 | /// indirectly. |
3884 | APK_CanNeverPassInRegs |
3885 | }; |
3886 | |
3887 | protected: |
3888 | RecordDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, |
3889 | SourceLocation StartLoc, SourceLocation IdLoc, |
3890 | IdentifierInfo *Id, RecordDecl *PrevDecl); |
3891 | |
3892 | public: |
3893 | static RecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC, |
3894 | SourceLocation StartLoc, SourceLocation IdLoc, |
3895 | IdentifierInfo *Id, RecordDecl* PrevDecl = nullptr); |
3896 | static RecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID); |
3897 | |
3898 | RecordDecl *getPreviousDecl() { |
3899 | return cast_or_null<RecordDecl>( |
3900 | static_cast<TagDecl *>(this)->getPreviousDecl()); |
3901 | } |
3902 | const RecordDecl *getPreviousDecl() const { |
3903 | return const_cast<RecordDecl*>(this)->getPreviousDecl(); |
3904 | } |
3905 | |
3906 | RecordDecl *getMostRecentDecl() { |
3907 | return cast<RecordDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl()); |
3908 | } |
3909 | const RecordDecl *getMostRecentDecl() const { |
3910 | return const_cast<RecordDecl*>(this)->getMostRecentDecl(); |
3911 | } |
3912 | |
3913 | bool hasFlexibleArrayMember() const { |
3914 | return RecordDeclBits.HasFlexibleArrayMember; |
3915 | } |
3916 | |
3917 | void setHasFlexibleArrayMember(bool V) { |
3918 | RecordDeclBits.HasFlexibleArrayMember = V; |
3919 | } |
3920 | |
3921 | /// Whether this is an anonymous struct or union. To be an anonymous |
3922 | /// struct or union, it must have been declared without a name and |
3923 | /// there must be no objects of this type declared, e.g., |
3924 | /// @code |
3925 | /// union { int i; float f; }; |
3926 | /// @endcode |
3927 | /// is an anonymous union but neither of the following are: |
3928 | /// @code |
3929 | /// union X { int i; float f; }; |
3930 | /// union { int i; float f; } obj; |
3931 | /// @endcode |
3932 | bool isAnonymousStructOrUnion() const { |
3933 | return RecordDeclBits.AnonymousStructOrUnion; |
3934 | } |
3935 | |
3936 | void setAnonymousStructOrUnion(bool Anon) { |
3937 | RecordDeclBits.AnonymousStructOrUnion = Anon; |
3938 | } |
3939 | |
3940 | bool hasObjectMember() const { return RecordDeclBits.HasObjectMember; } |
3941 | void setHasObjectMember(bool val) { RecordDeclBits.HasObjectMember = val; } |
3942 | |
3943 | bool hasVolatileMember() const { return RecordDeclBits.HasVolatileMember; } |
3944 | |
3945 | void setHasVolatileMember(bool val) { |
3946 | RecordDeclBits.HasVolatileMember = val; |
3947 | } |
3948 | |
3949 | bool hasLoadedFieldsFromExternalStorage() const { |
3950 | return RecordDeclBits.LoadedFieldsFromExternalStorage; |
3951 | } |
3952 | |
3953 | void setHasLoadedFieldsFromExternalStorage(bool val) const { |
3954 | RecordDeclBits.LoadedFieldsFromExternalStorage = val; |
3955 | } |
3956 | |
3957 | /// Functions to query basic properties of non-trivial C structs. |
3958 | bool isNonTrivialToPrimitiveDefaultInitialize() const { |
3959 | return RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize; |
3960 | } |
3961 | |
3962 | void setNonTrivialToPrimitiveDefaultInitialize(bool V) { |
3963 | RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize = V; |
3964 | } |
3965 | |
3966 | bool isNonTrivialToPrimitiveCopy() const { |
3967 | return RecordDeclBits.NonTrivialToPrimitiveCopy; |
3968 | } |
3969 | |
3970 | void setNonTrivialToPrimitiveCopy(bool V) { |
3971 | RecordDeclBits.NonTrivialToPrimitiveCopy = V; |
3972 | } |
3973 | |
3974 | bool isNonTrivialToPrimitiveDestroy() const { |
3975 | return RecordDeclBits.NonTrivialToPrimitiveDestroy; |
3976 | } |
3977 | |
3978 | void setNonTrivialToPrimitiveDestroy(bool V) { |
3979 | RecordDeclBits.NonTrivialToPrimitiveDestroy = V; |
3980 | } |
3981 | |
3982 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
3983 | return RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion; |
3984 | } |
3985 | |
3986 | void setHasNonTrivialToPrimitiveDefaultInitializeCUnion(bool V) { |
3987 | RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion = V; |
3988 | } |
3989 | |
3990 | bool hasNonTrivialToPrimitiveDestructCUnion() const { |
3991 | return RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion; |
3992 | } |
3993 | |
3994 | void setHasNonTrivialToPrimitiveDestructCUnion(bool V) { |
3995 | RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion = V; |
3996 | } |
3997 | |
3998 | bool hasNonTrivialToPrimitiveCopyCUnion() const { |
3999 | return RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion; |
4000 | } |
4001 | |
4002 | void setHasNonTrivialToPrimitiveCopyCUnion(bool V) { |
4003 | RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion = V; |
4004 | } |
4005 | |
4006 | /// Determine whether this class can be passed in registers. In C++ mode, |
4007 | /// it must have at least one trivial, non-deleted copy or move constructor. |
4008 | /// FIXME: This should be set as part of completeDefinition. |
4009 | bool canPassInRegisters() const { |
4010 | return getArgPassingRestrictions() == APK_CanPassInRegs; |
4011 | } |
4012 | |
4013 | ArgPassingKind getArgPassingRestrictions() const { |
4014 | return static_cast<ArgPassingKind>(RecordDeclBits.ArgPassingRestrictions); |
4015 | } |
4016 | |
4017 | void setArgPassingRestrictions(ArgPassingKind Kind) { |
4018 | RecordDeclBits.ArgPassingRestrictions = Kind; |
4019 | } |
4020 | |
4021 | bool isParamDestroyedInCallee() const { |
4022 | return RecordDeclBits.ParamDestroyedInCallee; |
4023 | } |
4024 | |
4025 | void setParamDestroyedInCallee(bool V) { |
4026 | RecordDeclBits.ParamDestroyedInCallee = V; |
4027 | } |
4028 | |
4029 | /// Determines whether this declaration represents the |
4030 | /// injected class name. |
4031 | /// |
4032 | /// The injected class name in C++ is the name of the class that |
4033 | /// appears inside the class itself. For example: |
4034 | /// |
4035 | /// \code |
4036 | /// struct C { |
4037 | /// // C is implicitly declared here as a synonym for the class name. |
4038 | /// }; |
4039 | /// |
4040 | /// C::C c; // same as "C c;" |
4041 | /// \endcode |
4042 | bool isInjectedClassName() const; |
4043 | |
4044 | /// Determine whether this record is a class describing a lambda |
4045 | /// function object. |
4046 | bool isLambda() const; |
4047 | |
4048 | /// Determine whether this record is a record for captured variables in |
4049 | /// CapturedStmt construct. |
4050 | bool isCapturedRecord() const; |
4051 | |
4052 | /// Mark the record as a record for captured variables in CapturedStmt |
4053 | /// construct. |
4054 | void setCapturedRecord(); |
4055 | |
4056 | /// Returns the RecordDecl that actually defines |
4057 | /// this struct/union/class. When determining whether or not a |
4058 | /// struct/union/class is completely defined, one should use this |
4059 | /// method as opposed to 'isCompleteDefinition'. |
4060 | /// 'isCompleteDefinition' indicates whether or not a specific |
4061 | /// RecordDecl is a completed definition, not whether or not the |
4062 | /// record type is defined. This method returns NULL if there is |
4063 | /// no RecordDecl that defines the struct/union/tag. |
4064 | RecordDecl *getDefinition() const { |
4065 | return cast_or_null<RecordDecl>(TagDecl::getDefinition()); |
4066 | } |
4067 | |
4068 | /// Returns whether this record is a union, or contains (at any nesting level) |
4069 | /// a union member. This is used by CMSE to warn about possible information |
4070 | /// leaks. |
4071 | bool isOrContainsUnion() const; |
4072 | |
4073 | // Iterator access to field members. The field iterator only visits |
4074 | // the non-static data members of this class, ignoring any static |
4075 | // data members, functions, constructors, destructors, etc. |
4076 | using field_iterator = specific_decl_iterator<FieldDecl>; |
4077 | using field_range = llvm::iterator_range<specific_decl_iterator<FieldDecl>>; |
4078 | |
4079 | field_range fields() const { return field_range(field_begin(), field_end()); } |
4080 | field_iterator field_begin() const; |
4081 | |
4082 | field_iterator field_end() const { |
4083 | return field_iterator(decl_iterator()); |
4084 | } |
4085 | |
4086 | // Whether there are any fields (non-static data members) in this record. |
4087 | bool field_empty() const { |
4088 | return field_begin() == field_end(); |
4089 | } |
4090 | |
4091 | /// Note that the definition of this type is now complete. |
4092 | virtual void completeDefinition(); |
4093 | |
4094 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4095 | static bool classofKind(Kind K) { |
4096 | return K >= firstRecord && K <= lastRecord; |
4097 | } |
4098 | |
4099 | /// Get whether or not this is an ms_struct which can |
4100 | /// be turned on with an attribute, pragma, or -mms-bitfields |
4101 | /// commandline option. |
4102 | bool isMsStruct(const ASTContext &C) const; |
4103 | |
4104 | /// Whether we are allowed to insert extra padding between fields. |
4105 | /// These padding are added to help AddressSanitizer detect |
4106 | /// intra-object-overflow bugs. |
4107 | bool mayInsertExtraPadding(bool EmitRemark = false) const; |
4108 | |
4109 | /// Finds the first data member which has a name. |
4110 | /// nullptr is returned if no named data member exists. |
4111 | const FieldDecl *findFirstNamedDataMember() const; |
4112 | |
4113 | private: |
4114 | /// Deserialize just the fields. |
4115 | void LoadFieldsFromExternalStorage() const; |
4116 | }; |
4117 | |
4118 | class FileScopeAsmDecl : public Decl { |
4119 | StringLiteral *AsmString; |
4120 | SourceLocation RParenLoc; |
4121 | |
4122 | FileScopeAsmDecl(DeclContext *DC, StringLiteral *asmstring, |
4123 | SourceLocation StartL, SourceLocation EndL) |
4124 | : Decl(FileScopeAsm, DC, StartL), AsmString(asmstring), RParenLoc(EndL) {} |
4125 | |
4126 | virtual void anchor(); |
4127 | |
4128 | public: |
4129 | static FileScopeAsmDecl *Create(ASTContext &C, DeclContext *DC, |
4130 | StringLiteral *Str, SourceLocation AsmLoc, |
4131 | SourceLocation RParenLoc); |
4132 | |
4133 | static FileScopeAsmDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4134 | |
4135 | SourceLocation getAsmLoc() const { return getLocation(); } |
4136 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4137 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
4138 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
4139 | return SourceRange(getAsmLoc(), getRParenLoc()); |
4140 | } |
4141 | |
4142 | const StringLiteral *getAsmString() const { return AsmString; } |
4143 | StringLiteral *getAsmString() { return AsmString; } |
4144 | void setAsmString(StringLiteral *Asm) { AsmString = Asm; } |
4145 | |
4146 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4147 | static bool classofKind(Kind K) { return K == FileScopeAsm; } |
4148 | }; |
4149 | |
4150 | /// Represents a block literal declaration, which is like an |
4151 | /// unnamed FunctionDecl. For example: |
4152 | /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } |
4153 | class BlockDecl : public Decl, public DeclContext { |
4154 | // This class stores some data in DeclContext::BlockDeclBits |
4155 | // to save some space. Use the provided accessors to access it. |
4156 | public: |
4157 | /// A class which contains all the information about a particular |
4158 | /// captured value. |
4159 | class Capture { |
4160 | enum { |
4161 | flag_isByRef = 0x1, |
4162 | flag_isNested = 0x2 |
4163 | }; |
4164 | |
4165 | /// The variable being captured. |
4166 | llvm::PointerIntPair<VarDecl*, 2> VariableAndFlags; |
4167 | |
4168 | /// The copy expression, expressed in terms of a DeclRef (or |
4169 | /// BlockDeclRef) to the captured variable. Only required if the |
4170 | /// variable has a C++ class type. |
4171 | Expr *CopyExpr; |
4172 | |
4173 | public: |
4174 | Capture(VarDecl *variable, bool byRef, bool nested, Expr *copy) |
4175 | : VariableAndFlags(variable, |
4176 | (byRef ? flag_isByRef : 0) | (nested ? flag_isNested : 0)), |
4177 | CopyExpr(copy) {} |
4178 | |
4179 | /// The variable being captured. |
4180 | VarDecl *getVariable() const { return VariableAndFlags.getPointer(); } |
4181 | |
4182 | /// Whether this is a "by ref" capture, i.e. a capture of a __block |
4183 | /// variable. |
4184 | bool isByRef() const { return VariableAndFlags.getInt() & flag_isByRef; } |
4185 | |
4186 | bool isEscapingByref() const { |
4187 | return getVariable()->isEscapingByref(); |
4188 | } |
4189 | |
4190 | bool isNonEscapingByref() const { |
4191 | return getVariable()->isNonEscapingByref(); |
4192 | } |
4193 | |
4194 | /// Whether this is a nested capture, i.e. the variable captured |
4195 | /// is not from outside the immediately enclosing function/block. |
4196 | bool isNested() const { return VariableAndFlags.getInt() & flag_isNested; } |
4197 | |
4198 | bool hasCopyExpr() const { return CopyExpr != nullptr; } |
4199 | Expr *getCopyExpr() const { return CopyExpr; } |
4200 | void setCopyExpr(Expr *e) { CopyExpr = e; } |
4201 | }; |
4202 | |
4203 | private: |
4204 | /// A new[]'d array of pointers to ParmVarDecls for the formal |
4205 | /// parameters of this function. This is null if a prototype or if there are |
4206 | /// no formals. |
4207 | ParmVarDecl **ParamInfo = nullptr; |
4208 | unsigned NumParams = 0; |
4209 | |
4210 | Stmt *Body = nullptr; |
4211 | TypeSourceInfo *SignatureAsWritten = nullptr; |
4212 | |
4213 | const Capture *Captures = nullptr; |
4214 | unsigned NumCaptures = 0; |
4215 | |
4216 | unsigned ManglingNumber = 0; |
4217 | Decl *ManglingContextDecl = nullptr; |
4218 | |
4219 | protected: |
4220 | BlockDecl(DeclContext *DC, SourceLocation CaretLoc); |
4221 | |
4222 | public: |
4223 | static BlockDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L); |
4224 | static BlockDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4225 | |
4226 | SourceLocation getCaretLocation() const { return getLocation(); } |
4227 | |
4228 | bool isVariadic() const { return BlockDeclBits.IsVariadic; } |
4229 | void setIsVariadic(bool value) { BlockDeclBits.IsVariadic = value; } |
4230 | |
4231 | CompoundStmt *getCompoundBody() const { return (CompoundStmt*) Body; } |
4232 | Stmt *getBody() const override { return (Stmt*) Body; } |
4233 | void setBody(CompoundStmt *B) { Body = (Stmt*) B; } |
4234 | |
4235 | void setSignatureAsWritten(TypeSourceInfo *Sig) { SignatureAsWritten = Sig; } |
4236 | TypeSourceInfo *getSignatureAsWritten() const { return SignatureAsWritten; } |
4237 | |
4238 | // ArrayRef access to formal parameters. |
4239 | ArrayRef<ParmVarDecl *> parameters() const { |
4240 | return {ParamInfo, getNumParams()}; |
4241 | } |
4242 | MutableArrayRef<ParmVarDecl *> parameters() { |
4243 | return {ParamInfo, getNumParams()}; |
4244 | } |
4245 | |
4246 | // Iterator access to formal parameters. |
4247 | using param_iterator = MutableArrayRef<ParmVarDecl *>::iterator; |
4248 | using param_const_iterator = ArrayRef<ParmVarDecl *>::const_iterator; |
4249 | |
4250 | bool param_empty() const { return parameters().empty(); } |
4251 | param_iterator param_begin() { return parameters().begin(); } |
4252 | param_iterator param_end() { return parameters().end(); } |
4253 | param_const_iterator param_begin() const { return parameters().begin(); } |
4254 | param_const_iterator param_end() const { return parameters().end(); } |
4255 | size_t param_size() const { return parameters().size(); } |
4256 | |
4257 | unsigned getNumParams() const { return NumParams; } |
4258 | |
4259 | const ParmVarDecl *getParamDecl(unsigned i) const { |
4260 | assert(i < getNumParams() && "Illegal param #")(static_cast <bool> (i < getNumParams() && "Illegal param #" ) ? void (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4260, __extension__ __PRETTY_FUNCTION__)); |
4261 | return ParamInfo[i]; |
4262 | } |
4263 | ParmVarDecl *getParamDecl(unsigned i) { |
4264 | assert(i < getNumParams() && "Illegal param #")(static_cast <bool> (i < getNumParams() && "Illegal param #" ) ? void (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4264, __extension__ __PRETTY_FUNCTION__)); |
4265 | return ParamInfo[i]; |
4266 | } |
4267 | |
4268 | void setParams(ArrayRef<ParmVarDecl *> NewParamInfo); |
4269 | |
4270 | /// True if this block (or its nested blocks) captures |
4271 | /// anything of local storage from its enclosing scopes. |
4272 | bool hasCaptures() const { return NumCaptures || capturesCXXThis(); } |
4273 | |
4274 | /// Returns the number of captured variables. |
4275 | /// Does not include an entry for 'this'. |
4276 | unsigned getNumCaptures() const { return NumCaptures; } |
4277 | |
4278 | using capture_const_iterator = ArrayRef<Capture>::const_iterator; |
4279 | |
4280 | ArrayRef<Capture> captures() const { return {Captures, NumCaptures}; } |
4281 | |
4282 | capture_const_iterator capture_begin() const { return captures().begin(); } |
4283 | capture_const_iterator capture_end() const { return captures().end(); } |
4284 | |
4285 | bool capturesCXXThis() const { return BlockDeclBits.CapturesCXXThis; } |
4286 | void setCapturesCXXThis(bool B = true) { BlockDeclBits.CapturesCXXThis = B; } |
4287 | |
4288 | bool blockMissingReturnType() const { |
4289 | return BlockDeclBits.BlockMissingReturnType; |
4290 | } |
4291 | |
4292 | void setBlockMissingReturnType(bool val = true) { |
4293 | BlockDeclBits.BlockMissingReturnType = val; |
4294 | } |
4295 | |
4296 | bool isConversionFromLambda() const { |
4297 | return BlockDeclBits.IsConversionFromLambda; |
4298 | } |
4299 | |
4300 | void setIsConversionFromLambda(bool val = true) { |
4301 | BlockDeclBits.IsConversionFromLambda = val; |
4302 | } |
4303 | |
4304 | bool doesNotEscape() const { return BlockDeclBits.DoesNotEscape; } |
4305 | void setDoesNotEscape(bool B = true) { BlockDeclBits.DoesNotEscape = B; } |
4306 | |
4307 | bool canAvoidCopyToHeap() const { |
4308 | return BlockDeclBits.CanAvoidCopyToHeap; |
4309 | } |
4310 | void setCanAvoidCopyToHeap(bool B = true) { |
4311 | BlockDeclBits.CanAvoidCopyToHeap = B; |
4312 | } |
4313 | |
4314 | bool capturesVariable(const VarDecl *var) const; |
4315 | |
4316 | void setCaptures(ASTContext &Context, ArrayRef<Capture> Captures, |
4317 | bool CapturesCXXThis); |
4318 | |
4319 | unsigned getBlockManglingNumber() const { return ManglingNumber; } |
4320 | |
4321 | Decl *getBlockManglingContextDecl() const { return ManglingContextDecl; } |
4322 | |
4323 | void setBlockMangling(unsigned Number, Decl *Ctx) { |
4324 | ManglingNumber = Number; |
4325 | ManglingContextDecl = Ctx; |
4326 | } |
4327 | |
4328 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
4329 | |
4330 | // Implement isa/cast/dyncast/etc. |
4331 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4332 | static bool classofKind(Kind K) { return K == Block; } |
4333 | static DeclContext *castToDeclContext(const BlockDecl *D) { |
4334 | return static_cast<DeclContext *>(const_cast<BlockDecl*>(D)); |
4335 | } |
4336 | static BlockDecl *castFromDeclContext(const DeclContext *DC) { |
4337 | return static_cast<BlockDecl *>(const_cast<DeclContext*>(DC)); |
4338 | } |
4339 | }; |
4340 | |
4341 | /// Represents the body of a CapturedStmt, and serves as its DeclContext. |
4342 | class CapturedDecl final |
4343 | : public Decl, |
4344 | public DeclContext, |
4345 | private llvm::TrailingObjects<CapturedDecl, ImplicitParamDecl *> { |
4346 | protected: |
4347 | size_t numTrailingObjects(OverloadToken<ImplicitParamDecl>) { |
4348 | return NumParams; |
4349 | } |
4350 | |
4351 | private: |
4352 | /// The number of parameters to the outlined function. |
4353 | unsigned NumParams; |
4354 | |
4355 | /// The position of context parameter in list of parameters. |
4356 | unsigned ContextParam; |
4357 | |
4358 | /// The body of the outlined function. |
4359 | llvm::PointerIntPair<Stmt *, 1, bool> BodyAndNothrow; |
4360 | |
4361 | explicit CapturedDecl(DeclContext *DC, unsigned NumParams); |
4362 | |
4363 | ImplicitParamDecl *const *getParams() const { |
4364 | return getTrailingObjects<ImplicitParamDecl *>(); |
4365 | } |
4366 | |
4367 | ImplicitParamDecl **getParams() { |
4368 | return getTrailingObjects<ImplicitParamDecl *>(); |
4369 | } |
4370 | |
4371 | public: |
4372 | friend class ASTDeclReader; |
4373 | friend class ASTDeclWriter; |
4374 | friend TrailingObjects; |
4375 | |
4376 | static CapturedDecl *Create(ASTContext &C, DeclContext *DC, |
4377 | unsigned NumParams); |
4378 | static CapturedDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
4379 | unsigned NumParams); |
4380 | |
4381 | Stmt *getBody() const override; |
4382 | void setBody(Stmt *B); |
4383 | |
4384 | bool isNothrow() const; |
4385 | void setNothrow(bool Nothrow = true); |
4386 | |
4387 | unsigned getNumParams() const { return NumParams; } |
4388 | |
4389 | ImplicitParamDecl *getParam(unsigned i) const { |
4390 | assert(i < NumParams)(static_cast <bool> (i < NumParams) ? void (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4390, __extension__ __PRETTY_FUNCTION__)); |
4391 | return getParams()[i]; |
4392 | } |
4393 | void setParam(unsigned i, ImplicitParamDecl *P) { |
4394 | assert(i < NumParams)(static_cast <bool> (i < NumParams) ? void (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4394, __extension__ __PRETTY_FUNCTION__)); |
4395 | getParams()[i] = P; |
4396 | } |
4397 | |
4398 | // ArrayRef interface to parameters. |
4399 | ArrayRef<ImplicitParamDecl *> parameters() const { |
4400 | return {getParams(), getNumParams()}; |
4401 | } |
4402 | MutableArrayRef<ImplicitParamDecl *> parameters() { |
4403 | return {getParams(), getNumParams()}; |
4404 | } |
4405 | |
4406 | /// Retrieve the parameter containing captured variables. |
4407 | ImplicitParamDecl *getContextParam() const { |
4408 | assert(ContextParam < NumParams)(static_cast <bool> (ContextParam < NumParams) ? void (0) : __assert_fail ("ContextParam < NumParams", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4408, __extension__ __PRETTY_FUNCTION__)); |
4409 | return getParam(ContextParam); |
4410 | } |
4411 | void setContextParam(unsigned i, ImplicitParamDecl *P) { |
4412 | assert(i < NumParams)(static_cast <bool> (i < NumParams) ? void (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4412, __extension__ __PRETTY_FUNCTION__)); |
4413 | ContextParam = i; |
4414 | setParam(i, P); |
4415 | } |
4416 | unsigned getContextParamPosition() const { return ContextParam; } |
4417 | |
4418 | using param_iterator = ImplicitParamDecl *const *; |
4419 | using param_range = llvm::iterator_range<param_iterator>; |
4420 | |
4421 | /// Retrieve an iterator pointing to the first parameter decl. |
4422 | param_iterator param_begin() const { return getParams(); } |
4423 | /// Retrieve an iterator one past the last parameter decl. |
4424 | param_iterator param_end() const { return getParams() + NumParams; } |
4425 | |
4426 | // Implement isa/cast/dyncast/etc. |
4427 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4428 | static bool classofKind(Kind K) { return K == Captured; } |
4429 | static DeclContext *castToDeclContext(const CapturedDecl *D) { |
4430 | return static_cast<DeclContext *>(const_cast<CapturedDecl *>(D)); |
4431 | } |
4432 | static CapturedDecl *castFromDeclContext(const DeclContext *DC) { |
4433 | return static_cast<CapturedDecl *>(const_cast<DeclContext *>(DC)); |
4434 | } |
4435 | }; |
4436 | |
4437 | /// Describes a module import declaration, which makes the contents |
4438 | /// of the named module visible in the current translation unit. |
4439 | /// |
4440 | /// An import declaration imports the named module (or submodule). For example: |
4441 | /// \code |
4442 | /// @import std.vector; |
4443 | /// \endcode |
4444 | /// |
4445 | /// Import declarations can also be implicitly generated from |
4446 | /// \#include/\#import directives. |
4447 | class ImportDecl final : public Decl, |
4448 | llvm::TrailingObjects<ImportDecl, SourceLocation> { |
4449 | friend class ASTContext; |
4450 | friend class ASTDeclReader; |
4451 | friend class ASTReader; |
4452 | friend TrailingObjects; |
4453 | |
4454 | /// The imported module. |
4455 | Module *ImportedModule = nullptr; |
4456 | |
4457 | /// The next import in the list of imports local to the translation |
4458 | /// unit being parsed (not loaded from an AST file). |
4459 | /// |
4460 | /// Includes a bit that indicates whether we have source-location information |
4461 | /// for each identifier in the module name. |
4462 | /// |
4463 | /// When the bit is false, we only have a single source location for the |
4464 | /// end of the import declaration. |
4465 | llvm::PointerIntPair<ImportDecl *, 1, bool> NextLocalImportAndComplete; |
4466 | |
4467 | ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported, |
4468 | ArrayRef<SourceLocation> IdentifierLocs); |
4469 | |
4470 | ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported, |
4471 | SourceLocation EndLoc); |
4472 | |
4473 | ImportDecl(EmptyShell Empty) : Decl(Import, Empty) {} |
4474 | |
4475 | bool isImportComplete() const { return NextLocalImportAndComplete.getInt(); } |
4476 | |
4477 | void setImportComplete(bool C) { NextLocalImportAndComplete.setInt(C); } |
4478 | |
4479 | /// The next import in the list of imports local to the translation |
4480 | /// unit being parsed (not loaded from an AST file). |
4481 | ImportDecl *getNextLocalImport() const { |
4482 | return NextLocalImportAndComplete.getPointer(); |
4483 | } |
4484 | |
4485 | void setNextLocalImport(ImportDecl *Import) { |
4486 | NextLocalImportAndComplete.setPointer(Import); |
4487 | } |
4488 | |
4489 | public: |
4490 | /// Create a new module import declaration. |
4491 | static ImportDecl *Create(ASTContext &C, DeclContext *DC, |
4492 | SourceLocation StartLoc, Module *Imported, |
4493 | ArrayRef<SourceLocation> IdentifierLocs); |
4494 | |
4495 | /// Create a new module import declaration for an implicitly-generated |
4496 | /// import. |
4497 | static ImportDecl *CreateImplicit(ASTContext &C, DeclContext *DC, |
4498 | SourceLocation StartLoc, Module *Imported, |
4499 | SourceLocation EndLoc); |
4500 | |
4501 | /// Create a new, deserialized module import declaration. |
4502 | static ImportDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
4503 | unsigned NumLocations); |
4504 | |
4505 | /// Retrieve the module that was imported by the import declaration. |
4506 | Module *getImportedModule() const { return ImportedModule; } |
4507 | |
4508 | /// Retrieves the locations of each of the identifiers that make up |
4509 | /// the complete module name in the import declaration. |
4510 | /// |
4511 | /// This will return an empty array if the locations of the individual |
4512 | /// identifiers aren't available. |
4513 | ArrayRef<SourceLocation> getIdentifierLocs() const; |
4514 | |
4515 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
4516 | |
4517 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4518 | static bool classofKind(Kind K) { return K == Import; } |
4519 | }; |
4520 | |
4521 | /// Represents a C++ Modules TS module export declaration. |
4522 | /// |
4523 | /// For example: |
4524 | /// \code |
4525 | /// export void foo(); |
4526 | /// \endcode |
4527 | class ExportDecl final : public Decl, public DeclContext { |
4528 | virtual void anchor(); |
4529 | |
4530 | private: |
4531 | friend class ASTDeclReader; |
4532 | |
4533 | /// The source location for the right brace (if valid). |
4534 | SourceLocation RBraceLoc; |
4535 | |
4536 | ExportDecl(DeclContext *DC, SourceLocation ExportLoc) |
4537 | : Decl(Export, DC, ExportLoc), DeclContext(Export), |
4538 | RBraceLoc(SourceLocation()) {} |
4539 | |
4540 | public: |
4541 | static ExportDecl *Create(ASTContext &C, DeclContext *DC, |
4542 | SourceLocation ExportLoc); |
4543 | static ExportDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4544 | |
4545 | SourceLocation getExportLoc() const { return getLocation(); } |
4546 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
4547 | void setRBraceLoc(SourceLocation L) { RBraceLoc = L; } |
4548 | |
4549 | bool hasBraces() const { return RBraceLoc.isValid(); } |
4550 | |
4551 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4552 | if (hasBraces()) |
4553 | return RBraceLoc; |
4554 | // No braces: get the end location of the (only) declaration in context |
4555 | // (if present). |
4556 | return decls_empty() ? getLocation() : decls_begin()->getEndLoc(); |
4557 | } |
4558 | |
4559 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
4560 | return SourceRange(getLocation(), getEndLoc()); |
4561 | } |
4562 | |
4563 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4564 | static bool classofKind(Kind K) { return K == Export; } |
4565 | static DeclContext *castToDeclContext(const ExportDecl *D) { |
4566 | return static_cast<DeclContext *>(const_cast<ExportDecl*>(D)); |
4567 | } |
4568 | static ExportDecl *castFromDeclContext(const DeclContext *DC) { |
4569 | return static_cast<ExportDecl *>(const_cast<DeclContext*>(DC)); |
4570 | } |
4571 | }; |
4572 | |
4573 | /// Represents an empty-declaration. |
4574 | class EmptyDecl : public Decl { |
4575 | EmptyDecl(DeclContext *DC, SourceLocation L) : Decl(Empty, DC, L) {} |
4576 | |
4577 | virtual void anchor(); |
4578 | |
4579 | public: |
4580 | static EmptyDecl *Create(ASTContext &C, DeclContext *DC, |
4581 | SourceLocation L); |
4582 | static EmptyDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4583 | |
4584 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4585 | static bool classofKind(Kind K) { return K == Empty; } |
4586 | }; |
4587 | |
4588 | /// Insertion operator for diagnostics. This allows sending NamedDecl's |
4589 | /// into a diagnostic with <<. |
4590 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
4591 | const NamedDecl *ND) { |
4592 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(ND), |
4593 | DiagnosticsEngine::ak_nameddecl); |
4594 | return PD; |
4595 | } |
4596 | |
4597 | template<typename decl_type> |
4598 | void Redeclarable<decl_type>::setPreviousDecl(decl_type *PrevDecl) { |
4599 | // Note: This routine is implemented here because we need both NamedDecl |
4600 | // and Redeclarable to be defined. |
4601 | assert(RedeclLink.isFirst() &&(static_cast <bool> (RedeclLink.isFirst() && "setPreviousDecl on a decl already in a redeclaration chain" ) ? void (0) : __assert_fail ("RedeclLink.isFirst() && \"setPreviousDecl on a decl already in a redeclaration chain\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4602, __extension__ __PRETTY_FUNCTION__)) |
4602 | "setPreviousDecl on a decl already in a redeclaration chain")(static_cast <bool> (RedeclLink.isFirst() && "setPreviousDecl on a decl already in a redeclaration chain" ) ? void (0) : __assert_fail ("RedeclLink.isFirst() && \"setPreviousDecl on a decl already in a redeclaration chain\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4602, __extension__ __PRETTY_FUNCTION__)); |
4603 | |
4604 | if (PrevDecl) { |
4605 | // Point to previous. Make sure that this is actually the most recent |
4606 | // redeclaration, or we can build invalid chains. If the most recent |
4607 | // redeclaration is invalid, it won't be PrevDecl, but we want it anyway. |
4608 | First = PrevDecl->getFirstDecl(); |
4609 | assert(First->RedeclLink.isFirst() && "Expected first")(static_cast <bool> (First->RedeclLink.isFirst() && "Expected first") ? void (0) : __assert_fail ("First->RedeclLink.isFirst() && \"Expected first\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4609, __extension__ __PRETTY_FUNCTION__)); |
4610 | decl_type *MostRecent = First->getNextRedeclaration(); |
4611 | RedeclLink = PreviousDeclLink(cast<decl_type>(MostRecent)); |
4612 | |
4613 | // If the declaration was previously visible, a redeclaration of it remains |
4614 | // visible even if it wouldn't be visible by itself. |
4615 | static_cast<decl_type*>(this)->IdentifierNamespace |= |
4616 | MostRecent->getIdentifierNamespace() & |
4617 | (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type); |
4618 | } else { |
4619 | // Make this first. |
4620 | First = static_cast<decl_type*>(this); |
4621 | } |
4622 | |
4623 | // First one will point to this one as latest. |
4624 | First->RedeclLink.setLatest(static_cast<decl_type*>(this)); |
4625 | |
4626 | assert(!isa<NamedDecl>(static_cast<decl_type*>(this)) ||(static_cast <bool> (!isa<NamedDecl>(static_cast< decl_type*>(this)) || cast<NamedDecl>(static_cast< decl_type*>(this))->isLinkageValid()) ? void (0) : __assert_fail ("!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4627, __extension__ __PRETTY_FUNCTION__)) |
4627 | cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid())(static_cast <bool> (!isa<NamedDecl>(static_cast< decl_type*>(this)) || cast<NamedDecl>(static_cast< decl_type*>(this))->isLinkageValid()) ? void (0) : __assert_fail ("!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Decl.h" , 4627, __extension__ __PRETTY_FUNCTION__)); |
4628 | } |
4629 | |
4630 | // Inline function definitions. |
4631 | |
4632 | /// Check if the given decl is complete. |
4633 | /// |
4634 | /// We use this function to break a cycle between the inline definitions in |
4635 | /// Type.h and Decl.h. |
4636 | inline bool IsEnumDeclComplete(EnumDecl *ED) { |
4637 | return ED->isComplete(); |
4638 | } |
4639 | |
4640 | /// Check if the given decl is scoped. |
4641 | /// |
4642 | /// We use this function to break a cycle between the inline definitions in |
4643 | /// Type.h and Decl.h. |
4644 | inline bool IsEnumDeclScoped(EnumDecl *ED) { |
4645 | return ED->isScoped(); |
4646 | } |
4647 | |
4648 | /// OpenMP variants are mangled early based on their OpenMP context selector. |
4649 | /// The new name looks likes this: |
4650 | /// <name> + OpenMPVariantManglingSeparatorStr + <mangled OpenMP context> |
4651 | static constexpr StringRef getOpenMPVariantManglingSeparatorStr() { |
4652 | return "$ompvariant"; |
4653 | } |
4654 | |
4655 | } // namespace clang |
4656 | |
4657 | #endif // LLVM_CLANG_AST_DECL_H |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | /// \file |
10 | /// C Language Family Type Representation |
11 | /// |
12 | /// This file defines the clang::Type interface and subclasses, used to |
13 | /// represent types for languages in the C family. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef LLVM_CLANG_AST_TYPE_H |
18 | #define LLVM_CLANG_AST_TYPE_H |
19 | |
20 | #include "clang/AST/DependenceFlags.h" |
21 | #include "clang/AST/NestedNameSpecifier.h" |
22 | #include "clang/AST/TemplateName.h" |
23 | #include "clang/Basic/AddressSpaces.h" |
24 | #include "clang/Basic/AttrKinds.h" |
25 | #include "clang/Basic/Diagnostic.h" |
26 | #include "clang/Basic/ExceptionSpecificationType.h" |
27 | #include "clang/Basic/LLVM.h" |
28 | #include "clang/Basic/Linkage.h" |
29 | #include "clang/Basic/PartialDiagnostic.h" |
30 | #include "clang/Basic/SourceLocation.h" |
31 | #include "clang/Basic/Specifiers.h" |
32 | #include "clang/Basic/Visibility.h" |
33 | #include "llvm/ADT/APInt.h" |
34 | #include "llvm/ADT/APSInt.h" |
35 | #include "llvm/ADT/ArrayRef.h" |
36 | #include "llvm/ADT/FoldingSet.h" |
37 | #include "llvm/ADT/None.h" |
38 | #include "llvm/ADT/Optional.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/StringRef.h" |
42 | #include "llvm/ADT/Twine.h" |
43 | #include "llvm/ADT/iterator_range.h" |
44 | #include "llvm/Support/Casting.h" |
45 | #include "llvm/Support/Compiler.h" |
46 | #include "llvm/Support/ErrorHandling.h" |
47 | #include "llvm/Support/PointerLikeTypeTraits.h" |
48 | #include "llvm/Support/TrailingObjects.h" |
49 | #include "llvm/Support/type_traits.h" |
50 | #include <cassert> |
51 | #include <cstddef> |
52 | #include <cstdint> |
53 | #include <cstring> |
54 | #include <string> |
55 | #include <type_traits> |
56 | #include <utility> |
57 | |
58 | namespace clang { |
59 | |
60 | class ExtQuals; |
61 | class QualType; |
62 | class ConceptDecl; |
63 | class TagDecl; |
64 | class TemplateParameterList; |
65 | class Type; |
66 | |
67 | enum { |
68 | TypeAlignmentInBits = 4, |
69 | TypeAlignment = 1 << TypeAlignmentInBits |
70 | }; |
71 | |
72 | namespace serialization { |
73 | template <class T> class AbstractTypeReader; |
74 | template <class T> class AbstractTypeWriter; |
75 | } |
76 | |
77 | } // namespace clang |
78 | |
79 | namespace llvm { |
80 | |
81 | template <typename T> |
82 | struct PointerLikeTypeTraits; |
83 | template<> |
84 | struct PointerLikeTypeTraits< ::clang::Type*> { |
85 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } |
86 | |
87 | static inline ::clang::Type *getFromVoidPointer(void *P) { |
88 | return static_cast< ::clang::Type*>(P); |
89 | } |
90 | |
91 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
92 | }; |
93 | |
94 | template<> |
95 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { |
96 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } |
97 | |
98 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { |
99 | return static_cast< ::clang::ExtQuals*>(P); |
100 | } |
101 | |
102 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
103 | }; |
104 | |
105 | } // namespace llvm |
106 | |
107 | namespace clang { |
108 | |
109 | class ASTContext; |
110 | template <typename> class CanQual; |
111 | class CXXRecordDecl; |
112 | class DeclContext; |
113 | class EnumDecl; |
114 | class Expr; |
115 | class ExtQualsTypeCommonBase; |
116 | class FunctionDecl; |
117 | class IdentifierInfo; |
118 | class NamedDecl; |
119 | class ObjCInterfaceDecl; |
120 | class ObjCProtocolDecl; |
121 | class ObjCTypeParamDecl; |
122 | struct PrintingPolicy; |
123 | class RecordDecl; |
124 | class Stmt; |
125 | class TagDecl; |
126 | class TemplateArgument; |
127 | class TemplateArgumentListInfo; |
128 | class TemplateArgumentLoc; |
129 | class TemplateTypeParmDecl; |
130 | class TypedefNameDecl; |
131 | class UnresolvedUsingTypenameDecl; |
132 | |
133 | using CanQualType = CanQual<Type>; |
134 | |
135 | // Provide forward declarations for all of the *Type classes. |
136 | #define TYPE(Class, Base) class Class##Type; |
137 | #include "clang/AST/TypeNodes.inc" |
138 | |
139 | /// The collection of all-type qualifiers we support. |
140 | /// Clang supports five independent qualifiers: |
141 | /// * C99: const, volatile, and restrict |
142 | /// * MS: __unaligned |
143 | /// * Embedded C (TR18037): address spaces |
144 | /// * Objective C: the GC attributes (none, weak, or strong) |
145 | class Qualifiers { |
146 | public: |
147 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. |
148 | Const = 0x1, |
149 | Restrict = 0x2, |
150 | Volatile = 0x4, |
151 | CVRMask = Const | Volatile | Restrict |
152 | }; |
153 | |
154 | enum GC { |
155 | GCNone = 0, |
156 | Weak, |
157 | Strong |
158 | }; |
159 | |
160 | enum ObjCLifetime { |
161 | /// There is no lifetime qualification on this type. |
162 | OCL_None, |
163 | |
164 | /// This object can be modified without requiring retains or |
165 | /// releases. |
166 | OCL_ExplicitNone, |
167 | |
168 | /// Assigning into this object requires the old value to be |
169 | /// released and the new value to be retained. The timing of the |
170 | /// release of the old value is inexact: it may be moved to |
171 | /// immediately after the last known point where the value is |
172 | /// live. |
173 | OCL_Strong, |
174 | |
175 | /// Reading or writing from this object requires a barrier call. |
176 | OCL_Weak, |
177 | |
178 | /// Assigning into this object requires a lifetime extension. |
179 | OCL_Autoreleasing |
180 | }; |
181 | |
182 | enum { |
183 | /// The maximum supported address space number. |
184 | /// 23 bits should be enough for anyone. |
185 | MaxAddressSpace = 0x7fffffu, |
186 | |
187 | /// The width of the "fast" qualifier mask. |
188 | FastWidth = 3, |
189 | |
190 | /// The fast qualifier mask. |
191 | FastMask = (1 << FastWidth) - 1 |
192 | }; |
193 | |
194 | /// Returns the common set of qualifiers while removing them from |
195 | /// the given sets. |
196 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { |
197 | // If both are only CVR-qualified, bit operations are sufficient. |
198 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { |
199 | Qualifiers Q; |
200 | Q.Mask = L.Mask & R.Mask; |
201 | L.Mask &= ~Q.Mask; |
202 | R.Mask &= ~Q.Mask; |
203 | return Q; |
204 | } |
205 | |
206 | Qualifiers Q; |
207 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); |
208 | Q.addCVRQualifiers(CommonCRV); |
209 | L.removeCVRQualifiers(CommonCRV); |
210 | R.removeCVRQualifiers(CommonCRV); |
211 | |
212 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { |
213 | Q.setObjCGCAttr(L.getObjCGCAttr()); |
214 | L.removeObjCGCAttr(); |
215 | R.removeObjCGCAttr(); |
216 | } |
217 | |
218 | if (L.getObjCLifetime() == R.getObjCLifetime()) { |
219 | Q.setObjCLifetime(L.getObjCLifetime()); |
220 | L.removeObjCLifetime(); |
221 | R.removeObjCLifetime(); |
222 | } |
223 | |
224 | if (L.getAddressSpace() == R.getAddressSpace()) { |
225 | Q.setAddressSpace(L.getAddressSpace()); |
226 | L.removeAddressSpace(); |
227 | R.removeAddressSpace(); |
228 | } |
229 | return Q; |
230 | } |
231 | |
232 | static Qualifiers fromFastMask(unsigned Mask) { |
233 | Qualifiers Qs; |
234 | Qs.addFastQualifiers(Mask); |
235 | return Qs; |
236 | } |
237 | |
238 | static Qualifiers fromCVRMask(unsigned CVR) { |
239 | Qualifiers Qs; |
240 | Qs.addCVRQualifiers(CVR); |
241 | return Qs; |
242 | } |
243 | |
244 | static Qualifiers fromCVRUMask(unsigned CVRU) { |
245 | Qualifiers Qs; |
246 | Qs.addCVRUQualifiers(CVRU); |
247 | return Qs; |
248 | } |
249 | |
250 | // Deserialize qualifiers from an opaque representation. |
251 | static Qualifiers fromOpaqueValue(unsigned opaque) { |
252 | Qualifiers Qs; |
253 | Qs.Mask = opaque; |
254 | return Qs; |
255 | } |
256 | |
257 | // Serialize these qualifiers into an opaque representation. |
258 | unsigned getAsOpaqueValue() const { |
259 | return Mask; |
260 | } |
261 | |
262 | bool hasConst() const { return Mask & Const; } |
263 | bool hasOnlyConst() const { return Mask == Const; } |
264 | void removeConst() { Mask &= ~Const; } |
265 | void addConst() { Mask |= Const; } |
266 | |
267 | bool hasVolatile() const { return Mask & Volatile; } |
268 | bool hasOnlyVolatile() const { return Mask == Volatile; } |
269 | void removeVolatile() { Mask &= ~Volatile; } |
270 | void addVolatile() { Mask |= Volatile; } |
271 | |
272 | bool hasRestrict() const { return Mask & Restrict; } |
273 | bool hasOnlyRestrict() const { return Mask == Restrict; } |
274 | void removeRestrict() { Mask &= ~Restrict; } |
275 | void addRestrict() { Mask |= Restrict; } |
276 | |
277 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } |
278 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } |
279 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } |
280 | |
281 | void setCVRQualifiers(unsigned mask) { |
282 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 282, __extension__ __PRETTY_FUNCTION__)); |
283 | Mask = (Mask & ~CVRMask) | mask; |
284 | } |
285 | void removeCVRQualifiers(unsigned mask) { |
286 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 286, __extension__ __PRETTY_FUNCTION__)); |
287 | Mask &= ~mask; |
288 | } |
289 | void removeCVRQualifiers() { |
290 | removeCVRQualifiers(CVRMask); |
291 | } |
292 | void addCVRQualifiers(unsigned mask) { |
293 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 293, __extension__ __PRETTY_FUNCTION__)); |
294 | Mask |= mask; |
295 | } |
296 | void addCVRUQualifiers(unsigned mask) { |
297 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")(static_cast <bool> (!(mask & ~CVRMask & ~UMask ) && "bitmask contains non-CVRU bits") ? void (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 297, __extension__ __PRETTY_FUNCTION__)); |
298 | Mask |= mask; |
299 | } |
300 | |
301 | bool hasUnaligned() const { return Mask & UMask; } |
302 | void setUnaligned(bool flag) { |
303 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); |
304 | } |
305 | void removeUnaligned() { Mask &= ~UMask; } |
306 | void addUnaligned() { Mask |= UMask; } |
307 | |
308 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } |
309 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } |
310 | void setObjCGCAttr(GC type) { |
311 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); |
312 | } |
313 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } |
314 | void addObjCGCAttr(GC type) { |
315 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 315, __extension__ __PRETTY_FUNCTION__)); |
316 | setObjCGCAttr(type); |
317 | } |
318 | Qualifiers withoutObjCGCAttr() const { |
319 | Qualifiers qs = *this; |
320 | qs.removeObjCGCAttr(); |
321 | return qs; |
322 | } |
323 | Qualifiers withoutObjCLifetime() const { |
324 | Qualifiers qs = *this; |
325 | qs.removeObjCLifetime(); |
326 | return qs; |
327 | } |
328 | Qualifiers withoutAddressSpace() const { |
329 | Qualifiers qs = *this; |
330 | qs.removeAddressSpace(); |
331 | return qs; |
332 | } |
333 | |
334 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } |
335 | ObjCLifetime getObjCLifetime() const { |
336 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); |
337 | } |
338 | void setObjCLifetime(ObjCLifetime type) { |
339 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); |
340 | } |
341 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } |
342 | void addObjCLifetime(ObjCLifetime type) { |
343 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 343, __extension__ __PRETTY_FUNCTION__)); |
344 | assert(!hasObjCLifetime())(static_cast <bool> (!hasObjCLifetime()) ? void (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 344, __extension__ __PRETTY_FUNCTION__)); |
345 | Mask |= (type << LifetimeShift); |
346 | } |
347 | |
348 | /// True if the lifetime is neither None or ExplicitNone. |
349 | bool hasNonTrivialObjCLifetime() const { |
350 | ObjCLifetime lifetime = getObjCLifetime(); |
351 | return (lifetime > OCL_ExplicitNone); |
352 | } |
353 | |
354 | /// True if the lifetime is either strong or weak. |
355 | bool hasStrongOrWeakObjCLifetime() const { |
356 | ObjCLifetime lifetime = getObjCLifetime(); |
357 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); |
358 | } |
359 | |
360 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } |
361 | LangAS getAddressSpace() const { |
362 | return static_cast<LangAS>(Mask >> AddressSpaceShift); |
363 | } |
364 | bool hasTargetSpecificAddressSpace() const { |
365 | return isTargetAddressSpace(getAddressSpace()); |
366 | } |
367 | /// Get the address space attribute value to be printed by diagnostics. |
368 | unsigned getAddressSpaceAttributePrintValue() const { |
369 | auto Addr = getAddressSpace(); |
370 | // This function is not supposed to be used with language specific |
371 | // address spaces. If that happens, the diagnostic message should consider |
372 | // printing the QualType instead of the address space value. |
373 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())(static_cast <bool> (Addr == LangAS::Default || hasTargetSpecificAddressSpace ()) ? void (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 373, __extension__ __PRETTY_FUNCTION__)); |
374 | if (Addr != LangAS::Default) |
375 | return toTargetAddressSpace(Addr); |
376 | // TODO: The diagnostic messages where Addr may be 0 should be fixed |
377 | // since it cannot differentiate the situation where 0 denotes the default |
378 | // address space or user specified __attribute__((address_space(0))). |
379 | return 0; |
380 | } |
381 | void setAddressSpace(LangAS space) { |
382 | assert((unsigned)space <= MaxAddressSpace)(static_cast <bool> ((unsigned)space <= MaxAddressSpace ) ? void (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 382, __extension__ __PRETTY_FUNCTION__)); |
383 | Mask = (Mask & ~AddressSpaceMask) |
384 | | (((uint32_t) space) << AddressSpaceShift); |
385 | } |
386 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } |
387 | void addAddressSpace(LangAS space) { |
388 | assert(space != LangAS::Default)(static_cast <bool> (space != LangAS::Default) ? void ( 0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 388, __extension__ __PRETTY_FUNCTION__)); |
389 | setAddressSpace(space); |
390 | } |
391 | |
392 | // Fast qualifiers are those that can be allocated directly |
393 | // on a QualType object. |
394 | bool hasFastQualifiers() const { return getFastQualifiers(); } |
395 | unsigned getFastQualifiers() const { return Mask & FastMask; } |
396 | void setFastQualifiers(unsigned mask) { |
397 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 397, __extension__ __PRETTY_FUNCTION__)); |
398 | Mask = (Mask & ~FastMask) | mask; |
399 | } |
400 | void removeFastQualifiers(unsigned mask) { |
401 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 401, __extension__ __PRETTY_FUNCTION__)); |
402 | Mask &= ~mask; |
403 | } |
404 | void removeFastQualifiers() { |
405 | removeFastQualifiers(FastMask); |
406 | } |
407 | void addFastQualifiers(unsigned mask) { |
408 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 408, __extension__ __PRETTY_FUNCTION__)); |
409 | Mask |= mask; |
410 | } |
411 | |
412 | /// Return true if the set contains any qualifiers which require an ExtQuals |
413 | /// node to be allocated. |
414 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } |
415 | Qualifiers getNonFastQualifiers() const { |
416 | Qualifiers Quals = *this; |
417 | Quals.setFastQualifiers(0); |
418 | return Quals; |
419 | } |
420 | |
421 | /// Return true if the set contains any qualifiers. |
422 | bool hasQualifiers() const { return Mask; } |
423 | bool empty() const { return !Mask; } |
424 | |
425 | /// Add the qualifiers from the given set to this set. |
426 | void addQualifiers(Qualifiers Q) { |
427 | // If the other set doesn't have any non-boolean qualifiers, just |
428 | // bit-or it in. |
429 | if (!(Q.Mask & ~CVRMask)) |
430 | Mask |= Q.Mask; |
431 | else { |
432 | Mask |= (Q.Mask & CVRMask); |
433 | if (Q.hasAddressSpace()) |
434 | addAddressSpace(Q.getAddressSpace()); |
435 | if (Q.hasObjCGCAttr()) |
436 | addObjCGCAttr(Q.getObjCGCAttr()); |
437 | if (Q.hasObjCLifetime()) |
438 | addObjCLifetime(Q.getObjCLifetime()); |
439 | } |
440 | } |
441 | |
442 | /// Remove the qualifiers from the given set from this set. |
443 | void removeQualifiers(Qualifiers Q) { |
444 | // If the other set doesn't have any non-boolean qualifiers, just |
445 | // bit-and the inverse in. |
446 | if (!(Q.Mask & ~CVRMask)) |
447 | Mask &= ~Q.Mask; |
448 | else { |
449 | Mask &= ~(Q.Mask & CVRMask); |
450 | if (getObjCGCAttr() == Q.getObjCGCAttr()) |
451 | removeObjCGCAttr(); |
452 | if (getObjCLifetime() == Q.getObjCLifetime()) |
453 | removeObjCLifetime(); |
454 | if (getAddressSpace() == Q.getAddressSpace()) |
455 | removeAddressSpace(); |
456 | } |
457 | } |
458 | |
459 | /// Add the qualifiers from the given set to this set, given that |
460 | /// they don't conflict. |
461 | void addConsistentQualifiers(Qualifiers qs) { |
462 | assert(getAddressSpace() == qs.getAddressSpace() ||(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)) |
463 | !hasAddressSpace() || !qs.hasAddressSpace())(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)); |
464 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)) |
465 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)); |
466 | assert(getObjCLifetime() == qs.getObjCLifetime() ||(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)) |
467 | !hasObjCLifetime() || !qs.hasObjCLifetime())(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)); |
468 | Mask |= qs.Mask; |
469 | } |
470 | |
471 | /// Returns true if address space A is equal to or a superset of B. |
472 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of |
473 | /// overlapping address spaces. |
474 | /// CL1.1 or CL1.2: |
475 | /// every address space is a superset of itself. |
476 | /// CL2.0 adds: |
477 | /// __generic is a superset of any address space except for __constant. |
478 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { |
479 | // Address spaces must match exactly. |
480 | return A == B || |
481 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except |
482 | // for __constant can be used as __generic. |
483 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant) || |
484 | // We also define global_device and global_host address spaces, |
485 | // to distinguish global pointers allocated on host from pointers |
486 | // allocated on device, which are a subset of __global. |
487 | (A == LangAS::opencl_global && (B == LangAS::opencl_global_device || |
488 | B == LangAS::opencl_global_host)) || |
489 | (A == LangAS::sycl_global && (B == LangAS::sycl_global_device || |
490 | B == LangAS::sycl_global_host)) || |
491 | // Consider pointer size address spaces to be equivalent to default. |
492 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && |
493 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)) || |
494 | // Default is a superset of SYCL address spaces. |
495 | (A == LangAS::Default && |
496 | (B == LangAS::sycl_private || B == LangAS::sycl_local || |
497 | B == LangAS::sycl_global || B == LangAS::sycl_global_device || |
498 | B == LangAS::sycl_global_host)) || |
499 | // In HIP device compilation, any cuda address space is allowed |
500 | // to implicitly cast into the default address space. |
501 | (A == LangAS::Default && |
502 | (B == LangAS::cuda_constant || B == LangAS::cuda_device || |
503 | B == LangAS::cuda_shared)); |
504 | } |
505 | |
506 | /// Returns true if the address space in these qualifiers is equal to or |
507 | /// a superset of the address space in the argument qualifiers. |
508 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
509 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
510 | } |
511 | |
512 | /// Determines if these qualifiers compatibly include another set. |
513 | /// Generally this answers the question of whether an object with the other |
514 | /// qualifiers can be safely used as an object with these qualifiers. |
515 | bool compatiblyIncludes(Qualifiers other) const { |
516 | return isAddressSpaceSupersetOf(other) && |
517 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
518 | // be changed. |
519 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
520 | !other.hasObjCGCAttr()) && |
521 | // ObjC lifetime qualifiers must match exactly. |
522 | getObjCLifetime() == other.getObjCLifetime() && |
523 | // CVR qualifiers may subset. |
524 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
525 | // U qualifier may superset. |
526 | (!other.hasUnaligned() || hasUnaligned()); |
527 | } |
528 | |
529 | /// Determines if these qualifiers compatibly include another set of |
530 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
531 | /// |
532 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
533 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
534 | /// including set also contains the 'const' qualifier, or both are non-__weak |
535 | /// and one is None (which can only happen in non-ARC modes). |
536 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
537 | if (getObjCLifetime() == other.getObjCLifetime()) |
538 | return true; |
539 | |
540 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
541 | return false; |
542 | |
543 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
544 | return true; |
545 | |
546 | return hasConst(); |
547 | } |
548 | |
549 | /// Determine whether this set of qualifiers is a strict superset of |
550 | /// another set of qualifiers, not considering qualifier compatibility. |
551 | bool isStrictSupersetOf(Qualifiers Other) const; |
552 | |
553 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
554 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
555 | |
556 | explicit operator bool() const { return hasQualifiers(); } |
557 | |
558 | Qualifiers &operator+=(Qualifiers R) { |
559 | addQualifiers(R); |
560 | return *this; |
561 | } |
562 | |
563 | // Union two qualifier sets. If an enumerated qualifier appears |
564 | // in both sets, use the one from the right. |
565 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
566 | L += R; |
567 | return L; |
568 | } |
569 | |
570 | Qualifiers &operator-=(Qualifiers R) { |
571 | removeQualifiers(R); |
572 | return *this; |
573 | } |
574 | |
575 | /// Compute the difference between two qualifier sets. |
576 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
577 | L -= R; |
578 | return L; |
579 | } |
580 | |
581 | std::string getAsString() const; |
582 | std::string getAsString(const PrintingPolicy &Policy) const; |
583 | |
584 | static std::string getAddrSpaceAsString(LangAS AS); |
585 | |
586 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
587 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
588 | bool appendSpaceIfNonEmpty = false) const; |
589 | |
590 | void Profile(llvm::FoldingSetNodeID &ID) const { |
591 | ID.AddInteger(Mask); |
592 | } |
593 | |
594 | private: |
595 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
596 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
597 | uint32_t Mask = 0; |
598 | |
599 | static const uint32_t UMask = 0x8; |
600 | static const uint32_t UShift = 3; |
601 | static const uint32_t GCAttrMask = 0x30; |
602 | static const uint32_t GCAttrShift = 4; |
603 | static const uint32_t LifetimeMask = 0x1C0; |
604 | static const uint32_t LifetimeShift = 6; |
605 | static const uint32_t AddressSpaceMask = |
606 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
607 | static const uint32_t AddressSpaceShift = 9; |
608 | }; |
609 | |
610 | /// A std::pair-like structure for storing a qualified type split |
611 | /// into its local qualifiers and its locally-unqualified type. |
612 | struct SplitQualType { |
613 | /// The locally-unqualified type. |
614 | const Type *Ty = nullptr; |
615 | |
616 | /// The local qualifiers. |
617 | Qualifiers Quals; |
618 | |
619 | SplitQualType() = default; |
620 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
621 | |
622 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
623 | |
624 | // Make std::tie work. |
625 | std::pair<const Type *,Qualifiers> asPair() const { |
626 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
627 | } |
628 | |
629 | friend bool operator==(SplitQualType a, SplitQualType b) { |
630 | return a.Ty == b.Ty && a.Quals == b.Quals; |
631 | } |
632 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
633 | return a.Ty != b.Ty || a.Quals != b.Quals; |
634 | } |
635 | }; |
636 | |
637 | /// The kind of type we are substituting Objective-C type arguments into. |
638 | /// |
639 | /// The kind of substitution affects the replacement of type parameters when |
640 | /// no concrete type information is provided, e.g., when dealing with an |
641 | /// unspecialized type. |
642 | enum class ObjCSubstitutionContext { |
643 | /// An ordinary type. |
644 | Ordinary, |
645 | |
646 | /// The result type of a method or function. |
647 | Result, |
648 | |
649 | /// The parameter type of a method or function. |
650 | Parameter, |
651 | |
652 | /// The type of a property. |
653 | Property, |
654 | |
655 | /// The superclass of a type. |
656 | Superclass, |
657 | }; |
658 | |
659 | /// A (possibly-)qualified type. |
660 | /// |
661 | /// For efficiency, we don't store CV-qualified types as nodes on their |
662 | /// own: instead each reference to a type stores the qualifiers. This |
663 | /// greatly reduces the number of nodes we need to allocate for types (for |
664 | /// example we only need one for 'int', 'const int', 'volatile int', |
665 | /// 'const volatile int', etc). |
666 | /// |
667 | /// As an added efficiency bonus, instead of making this a pair, we |
668 | /// just store the two bits we care about in the low bits of the |
669 | /// pointer. To handle the packing/unpacking, we make QualType be a |
670 | /// simple wrapper class that acts like a smart pointer. A third bit |
671 | /// indicates whether there are extended qualifiers present, in which |
672 | /// case the pointer points to a special structure. |
673 | class QualType { |
674 | friend class QualifierCollector; |
675 | |
676 | // Thankfully, these are efficiently composable. |
677 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
678 | Qualifiers::FastWidth> Value; |
679 | |
680 | const ExtQuals *getExtQualsUnsafe() const { |
681 | return Value.getPointer().get<const ExtQuals*>(); |
682 | } |
683 | |
684 | const Type *getTypePtrUnsafe() const { |
685 | return Value.getPointer().get<const Type*>(); |
686 | } |
687 | |
688 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
689 | assert(!isNull() && "Cannot retrieve a NULL type pointer")(static_cast <bool> (!isNull() && "Cannot retrieve a NULL type pointer" ) ? void (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 689, __extension__ __PRETTY_FUNCTION__)); |
690 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
691 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
692 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
693 | } |
694 | |
695 | public: |
696 | QualType() = default; |
697 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
698 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
699 | |
700 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
701 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
702 | |
703 | /// Retrieves a pointer to the underlying (unqualified) type. |
704 | /// |
705 | /// This function requires that the type not be NULL. If the type might be |
706 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
707 | const Type *getTypePtr() const; |
708 | |
709 | const Type *getTypePtrOrNull() const; |
710 | |
711 | /// Retrieves a pointer to the name of the base type. |
712 | const IdentifierInfo *getBaseTypeIdentifier() const; |
713 | |
714 | /// Divides a QualType into its unqualified type and a set of local |
715 | /// qualifiers. |
716 | SplitQualType split() const; |
717 | |
718 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
719 | |
720 | static QualType getFromOpaquePtr(const void *Ptr) { |
721 | QualType T; |
722 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
723 | return T; |
724 | } |
725 | |
726 | const Type &operator*() const { |
727 | return *getTypePtr(); |
728 | } |
729 | |
730 | const Type *operator->() const { |
731 | return getTypePtr(); |
732 | } |
733 | |
734 | bool isCanonical() const; |
735 | bool isCanonicalAsParam() const; |
736 | |
737 | /// Return true if this QualType doesn't point to a type yet. |
738 | bool isNull() const { |
739 | return Value.getPointer().isNull(); |
740 | } |
741 | |
742 | /// Determine whether this particular QualType instance has the |
743 | /// "const" qualifier set, without looking through typedefs that may have |
744 | /// added "const" at a different level. |
745 | bool isLocalConstQualified() const { |
746 | return (getLocalFastQualifiers() & Qualifiers::Const); |
747 | } |
748 | |
749 | /// Determine whether this type is const-qualified. |
750 | bool isConstQualified() const; |
751 | |
752 | /// Determine whether this particular QualType instance has the |
753 | /// "restrict" qualifier set, without looking through typedefs that may have |
754 | /// added "restrict" at a different level. |
755 | bool isLocalRestrictQualified() const { |
756 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
757 | } |
758 | |
759 | /// Determine whether this type is restrict-qualified. |
760 | bool isRestrictQualified() const; |
761 | |
762 | /// Determine whether this particular QualType instance has the |
763 | /// "volatile" qualifier set, without looking through typedefs that may have |
764 | /// added "volatile" at a different level. |
765 | bool isLocalVolatileQualified() const { |
766 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
767 | } |
768 | |
769 | /// Determine whether this type is volatile-qualified. |
770 | bool isVolatileQualified() const; |
771 | |
772 | /// Determine whether this particular QualType instance has any |
773 | /// qualifiers, without looking through any typedefs that might add |
774 | /// qualifiers at a different level. |
775 | bool hasLocalQualifiers() const { |
776 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
777 | } |
778 | |
779 | /// Determine whether this type has any qualifiers. |
780 | bool hasQualifiers() const; |
781 | |
782 | /// Determine whether this particular QualType instance has any |
783 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
784 | /// instance. |
785 | bool hasLocalNonFastQualifiers() const { |
786 | return Value.getPointer().is<const ExtQuals*>(); |
787 | } |
788 | |
789 | /// Retrieve the set of qualifiers local to this particular QualType |
790 | /// instance, not including any qualifiers acquired through typedefs or |
791 | /// other sugar. |
792 | Qualifiers getLocalQualifiers() const; |
793 | |
794 | /// Retrieve the set of qualifiers applied to this type. |
795 | Qualifiers getQualifiers() const; |
796 | |
797 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
798 | /// local to this particular QualType instance, not including any qualifiers |
799 | /// acquired through typedefs or other sugar. |
800 | unsigned getLocalCVRQualifiers() const { |
801 | return getLocalFastQualifiers(); |
802 | } |
803 | |
804 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
805 | /// applied to this type. |
806 | unsigned getCVRQualifiers() const; |
807 | |
808 | bool isConstant(const ASTContext& Ctx) const { |
809 | return QualType::isConstant(*this, Ctx); |
810 | } |
811 | |
812 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
813 | bool isPODType(const ASTContext &Context) const; |
814 | |
815 | /// Return true if this is a POD type according to the rules of the C++98 |
816 | /// standard, regardless of the current compilation's language. |
817 | bool isCXX98PODType(const ASTContext &Context) const; |
818 | |
819 | /// Return true if this is a POD type according to the more relaxed rules |
820 | /// of the C++11 standard, regardless of the current compilation's language. |
821 | /// (C++0x [basic.types]p9). Note that, unlike |
822 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
823 | bool isCXX11PODType(const ASTContext &Context) const; |
824 | |
825 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
826 | bool isTrivialType(const ASTContext &Context) const; |
827 | |
828 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
829 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
830 | |
831 | |
832 | /// Returns true if it is a class and it might be dynamic. |
833 | bool mayBeDynamicClass() const; |
834 | |
835 | /// Returns true if it is not a class or if the class might not be dynamic. |
836 | bool mayBeNotDynamicClass() const; |
837 | |
838 | // Don't promise in the API that anything besides 'const' can be |
839 | // easily added. |
840 | |
841 | /// Add the `const` type qualifier to this QualType. |
842 | void addConst() { |
843 | addFastQualifiers(Qualifiers::Const); |
844 | } |
845 | QualType withConst() const { |
846 | return withFastQualifiers(Qualifiers::Const); |
847 | } |
848 | |
849 | /// Add the `volatile` type qualifier to this QualType. |
850 | void addVolatile() { |
851 | addFastQualifiers(Qualifiers::Volatile); |
852 | } |
853 | QualType withVolatile() const { |
854 | return withFastQualifiers(Qualifiers::Volatile); |
855 | } |
856 | |
857 | /// Add the `restrict` qualifier to this QualType. |
858 | void addRestrict() { |
859 | addFastQualifiers(Qualifiers::Restrict); |
860 | } |
861 | QualType withRestrict() const { |
862 | return withFastQualifiers(Qualifiers::Restrict); |
863 | } |
864 | |
865 | QualType withCVRQualifiers(unsigned CVR) const { |
866 | return withFastQualifiers(CVR); |
867 | } |
868 | |
869 | void addFastQualifiers(unsigned TQs) { |
870 | assert(!(TQs & ~Qualifiers::FastMask)(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 871, __extension__ __PRETTY_FUNCTION__)) |
871 | && "non-fast qualifier bits set in mask!")(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 871, __extension__ __PRETTY_FUNCTION__)); |
872 | Value.setInt(Value.getInt() | TQs); |
873 | } |
874 | |
875 | void removeLocalConst(); |
876 | void removeLocalVolatile(); |
877 | void removeLocalRestrict(); |
878 | void removeLocalCVRQualifiers(unsigned Mask); |
879 | |
880 | void removeLocalFastQualifiers() { Value.setInt(0); } |
881 | void removeLocalFastQualifiers(unsigned Mask) { |
882 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")(static_cast <bool> (!(Mask & ~Qualifiers::FastMask ) && "mask has non-fast qualifiers") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 882, __extension__ __PRETTY_FUNCTION__)); |
883 | Value.setInt(Value.getInt() & ~Mask); |
884 | } |
885 | |
886 | // Creates a type with the given qualifiers in addition to any |
887 | // qualifiers already on this type. |
888 | QualType withFastQualifiers(unsigned TQs) const { |
889 | QualType T = *this; |
890 | T.addFastQualifiers(TQs); |
891 | return T; |
892 | } |
893 | |
894 | // Creates a type with exactly the given fast qualifiers, removing |
895 | // any existing fast qualifiers. |
896 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
897 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
898 | } |
899 | |
900 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
901 | QualType withoutLocalFastQualifiers() const { |
902 | QualType T = *this; |
903 | T.removeLocalFastQualifiers(); |
904 | return T; |
905 | } |
906 | |
907 | QualType getCanonicalType() const; |
908 | |
909 | /// Return this type with all of the instance-specific qualifiers |
910 | /// removed, but without removing any qualifiers that may have been applied |
911 | /// through typedefs. |
912 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
913 | |
914 | /// Retrieve the unqualified variant of the given type, |
915 | /// removing as little sugar as possible. |
916 | /// |
917 | /// This routine looks through various kinds of sugar to find the |
918 | /// least-desugared type that is unqualified. For example, given: |
919 | /// |
920 | /// \code |
921 | /// typedef int Integer; |
922 | /// typedef const Integer CInteger; |
923 | /// typedef CInteger DifferenceType; |
924 | /// \endcode |
925 | /// |
926 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
927 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
928 | /// |
929 | /// The resulting type might still be qualified if it's sugar for an array |
930 | /// type. To strip qualifiers even from within a sugared array type, use |
931 | /// ASTContext::getUnqualifiedArrayType. |
932 | inline QualType getUnqualifiedType() const; |
933 | |
934 | /// Retrieve the unqualified variant of the given type, removing as little |
935 | /// sugar as possible. |
936 | /// |
937 | /// Like getUnqualifiedType(), but also returns the set of |
938 | /// qualifiers that were built up. |
939 | /// |
940 | /// The resulting type might still be qualified if it's sugar for an array |
941 | /// type. To strip qualifiers even from within a sugared array type, use |
942 | /// ASTContext::getUnqualifiedArrayType. |
943 | inline SplitQualType getSplitUnqualifiedType() const; |
944 | |
945 | /// Determine whether this type is more qualified than the other |
946 | /// given type, requiring exact equality for non-CVR qualifiers. |
947 | bool isMoreQualifiedThan(QualType Other) const; |
948 | |
949 | /// Determine whether this type is at least as qualified as the other |
950 | /// given type, requiring exact equality for non-CVR qualifiers. |
951 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
952 | |
953 | QualType getNonReferenceType() const; |
954 | |
955 | /// Determine the type of a (typically non-lvalue) expression with the |
956 | /// specified result type. |
957 | /// |
958 | /// This routine should be used for expressions for which the return type is |
959 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
960 | /// an lvalue. It removes a top-level reference (since there are no |
961 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
962 | /// from non-class types (in C++) or all types (in C). |
963 | QualType getNonLValueExprType(const ASTContext &Context) const; |
964 | |
965 | /// Remove an outer pack expansion type (if any) from this type. Used as part |
966 | /// of converting the type of a declaration to the type of an expression that |
967 | /// references that expression. It's meaningless for an expression to have a |
968 | /// pack expansion type. |
969 | QualType getNonPackExpansionType() const; |
970 | |
971 | /// Return the specified type with any "sugar" removed from |
972 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
973 | /// the type is already concrete, it returns it unmodified. This is similar |
974 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
975 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
976 | /// concrete. |
977 | /// |
978 | /// Qualifiers are left in place. |
979 | QualType getDesugaredType(const ASTContext &Context) const { |
980 | return getDesugaredType(*this, Context); |
981 | } |
982 | |
983 | SplitQualType getSplitDesugaredType() const { |
984 | return getSplitDesugaredType(*this); |
985 | } |
986 | |
987 | /// Return the specified type with one level of "sugar" removed from |
988 | /// the type. |
989 | /// |
990 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
991 | /// of the type is already concrete, it returns it unmodified. |
992 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
993 | return getSingleStepDesugaredTypeImpl(*this, Context); |
994 | } |
995 | |
996 | /// Returns the specified type after dropping any |
997 | /// outer-level parentheses. |
998 | QualType IgnoreParens() const { |
999 | if (isa<ParenType>(*this)) |
1000 | return QualType::IgnoreParens(*this); |
1001 | return *this; |
1002 | } |
1003 | |
1004 | /// Indicate whether the specified types and qualifiers are identical. |
1005 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
1006 | return LHS.Value == RHS.Value; |
1007 | } |
1008 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
1009 | return LHS.Value != RHS.Value; |
1010 | } |
1011 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
1012 | return LHS.Value < RHS.Value; |
1013 | } |
1014 | |
1015 | static std::string getAsString(SplitQualType split, |
1016 | const PrintingPolicy &Policy) { |
1017 | return getAsString(split.Ty, split.Quals, Policy); |
1018 | } |
1019 | static std::string getAsString(const Type *ty, Qualifiers qs, |
1020 | const PrintingPolicy &Policy); |
1021 | |
1022 | std::string getAsString() const; |
1023 | std::string getAsString(const PrintingPolicy &Policy) const; |
1024 | |
1025 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
1026 | const Twine &PlaceHolder = Twine(), |
1027 | unsigned Indentation = 0) const; |
1028 | |
1029 | static void print(SplitQualType split, raw_ostream &OS, |
1030 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
1031 | unsigned Indentation = 0) { |
1032 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
1033 | } |
1034 | |
1035 | static void print(const Type *ty, Qualifiers qs, |
1036 | raw_ostream &OS, const PrintingPolicy &policy, |
1037 | const Twine &PlaceHolder, |
1038 | unsigned Indentation = 0); |
1039 | |
1040 | void getAsStringInternal(std::string &Str, |
1041 | const PrintingPolicy &Policy) const; |
1042 | |
1043 | static void getAsStringInternal(SplitQualType split, std::string &out, |
1044 | const PrintingPolicy &policy) { |
1045 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
1046 | } |
1047 | |
1048 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
1049 | std::string &out, |
1050 | const PrintingPolicy &policy); |
1051 | |
1052 | class StreamedQualTypeHelper { |
1053 | const QualType &T; |
1054 | const PrintingPolicy &Policy; |
1055 | const Twine &PlaceHolder; |
1056 | unsigned Indentation; |
1057 | |
1058 | public: |
1059 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
1060 | const Twine &PlaceHolder, unsigned Indentation) |
1061 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
1062 | Indentation(Indentation) {} |
1063 | |
1064 | friend raw_ostream &operator<<(raw_ostream &OS, |
1065 | const StreamedQualTypeHelper &SQT) { |
1066 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
1067 | return OS; |
1068 | } |
1069 | }; |
1070 | |
1071 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
1072 | const Twine &PlaceHolder = Twine(), |
1073 | unsigned Indentation = 0) const { |
1074 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
1075 | } |
1076 | |
1077 | void dump(const char *s) const; |
1078 | void dump() const; |
1079 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
1080 | |
1081 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1082 | ID.AddPointer(getAsOpaquePtr()); |
1083 | } |
1084 | |
1085 | /// Check if this type has any address space qualifier. |
1086 | inline bool hasAddressSpace() const; |
1087 | |
1088 | /// Return the address space of this type. |
1089 | inline LangAS getAddressSpace() const; |
1090 | |
1091 | /// Returns true if address space qualifiers overlap with T address space |
1092 | /// qualifiers. |
1093 | /// OpenCL C defines conversion rules for pointers to different address spaces |
1094 | /// and notion of overlapping address spaces. |
1095 | /// CL1.1 or CL1.2: |
1096 | /// address spaces overlap iff they are they same. |
1097 | /// OpenCL C v2.0 s6.5.5 adds: |
1098 | /// __generic overlaps with any address space except for __constant. |
1099 | bool isAddressSpaceOverlapping(QualType T) const { |
1100 | Qualifiers Q = getQualifiers(); |
1101 | Qualifiers TQ = T.getQualifiers(); |
1102 | // Address spaces overlap if at least one of them is a superset of another |
1103 | return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q); |
1104 | } |
1105 | |
1106 | /// Returns gc attribute of this type. |
1107 | inline Qualifiers::GC getObjCGCAttr() const; |
1108 | |
1109 | /// true when Type is objc's weak. |
1110 | bool isObjCGCWeak() const { |
1111 | return getObjCGCAttr() == Qualifiers::Weak; |
1112 | } |
1113 | |
1114 | /// true when Type is objc's strong. |
1115 | bool isObjCGCStrong() const { |
1116 | return getObjCGCAttr() == Qualifiers::Strong; |
1117 | } |
1118 | |
1119 | /// Returns lifetime attribute of this type. |
1120 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1121 | return getQualifiers().getObjCLifetime(); |
1122 | } |
1123 | |
1124 | bool hasNonTrivialObjCLifetime() const { |
1125 | return getQualifiers().hasNonTrivialObjCLifetime(); |
1126 | } |
1127 | |
1128 | bool hasStrongOrWeakObjCLifetime() const { |
1129 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
1130 | } |
1131 | |
1132 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
1133 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
1134 | |
1135 | enum PrimitiveDefaultInitializeKind { |
1136 | /// The type does not fall into any of the following categories. Note that |
1137 | /// this case is zero-valued so that values of this enum can be used as a |
1138 | /// boolean condition for non-triviality. |
1139 | PDIK_Trivial, |
1140 | |
1141 | /// The type is an Objective-C retainable pointer type that is qualified |
1142 | /// with the ARC __strong qualifier. |
1143 | PDIK_ARCStrong, |
1144 | |
1145 | /// The type is an Objective-C retainable pointer type that is qualified |
1146 | /// with the ARC __weak qualifier. |
1147 | PDIK_ARCWeak, |
1148 | |
1149 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
1150 | PDIK_Struct |
1151 | }; |
1152 | |
1153 | /// Functions to query basic properties of non-trivial C struct types. |
1154 | |
1155 | /// Check if this is a non-trivial type that would cause a C struct |
1156 | /// transitively containing this type to be non-trivial to default initialize |
1157 | /// and return the kind. |
1158 | PrimitiveDefaultInitializeKind |
1159 | isNonTrivialToPrimitiveDefaultInitialize() const; |
1160 | |
1161 | enum PrimitiveCopyKind { |
1162 | /// The type does not fall into any of the following categories. Note that |
1163 | /// this case is zero-valued so that values of this enum can be used as a |
1164 | /// boolean condition for non-triviality. |
1165 | PCK_Trivial, |
1166 | |
1167 | /// The type would be trivial except that it is volatile-qualified. Types |
1168 | /// that fall into one of the other non-trivial cases may additionally be |
1169 | /// volatile-qualified. |
1170 | PCK_VolatileTrivial, |
1171 | |
1172 | /// The type is an Objective-C retainable pointer type that is qualified |
1173 | /// with the ARC __strong qualifier. |
1174 | PCK_ARCStrong, |
1175 | |
1176 | /// The type is an Objective-C retainable pointer type that is qualified |
1177 | /// with the ARC __weak qualifier. |
1178 | PCK_ARCWeak, |
1179 | |
1180 | /// The type is a struct containing a field whose type is neither |
1181 | /// PCK_Trivial nor PCK_VolatileTrivial. |
1182 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
1183 | /// semantics are too complex to express here, in part because they depend |
1184 | /// on the exact constructor or assignment operator that is chosen by |
1185 | /// overload resolution to do the copy. |
1186 | PCK_Struct |
1187 | }; |
1188 | |
1189 | /// Check if this is a non-trivial type that would cause a C struct |
1190 | /// transitively containing this type to be non-trivial to copy and return the |
1191 | /// kind. |
1192 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
1193 | |
1194 | /// Check if this is a non-trivial type that would cause a C struct |
1195 | /// transitively containing this type to be non-trivial to destructively |
1196 | /// move and return the kind. Destructive move in this context is a C++-style |
1197 | /// move in which the source object is placed in a valid but unspecified state |
1198 | /// after it is moved, as opposed to a truly destructive move in which the |
1199 | /// source object is placed in an uninitialized state. |
1200 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
1201 | |
1202 | enum DestructionKind { |
1203 | DK_none, |
1204 | DK_cxx_destructor, |
1205 | DK_objc_strong_lifetime, |
1206 | DK_objc_weak_lifetime, |
1207 | DK_nontrivial_c_struct |
1208 | }; |
1209 | |
1210 | /// Returns a nonzero value if objects of this type require |
1211 | /// non-trivial work to clean up after. Non-zero because it's |
1212 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
1213 | /// something require destruction. |
1214 | DestructionKind isDestructedType() const { |
1215 | return isDestructedTypeImpl(*this); |
1216 | } |
1217 | |
1218 | /// Check if this is or contains a C union that is non-trivial to |
1219 | /// default-initialize, which is a union that has a member that is non-trivial |
1220 | /// to default-initialize. If this returns true, |
1221 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
1222 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
1223 | |
1224 | /// Check if this is or contains a C union that is non-trivial to destruct, |
1225 | /// which is a union that has a member that is non-trivial to destruct. If |
1226 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
1227 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
1228 | |
1229 | /// Check if this is or contains a C union that is non-trivial to copy, which |
1230 | /// is a union that has a member that is non-trivial to copy. If this returns |
1231 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
1232 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
1233 | |
1234 | /// Determine whether expressions of the given type are forbidden |
1235 | /// from being lvalues in C. |
1236 | /// |
1237 | /// The expression types that are forbidden to be lvalues are: |
1238 | /// - 'void', but not qualified void |
1239 | /// - function types |
1240 | /// |
1241 | /// The exact rule here is C99 6.3.2.1: |
1242 | /// An lvalue is an expression with an object type or an incomplete |
1243 | /// type other than void. |
1244 | bool isCForbiddenLValueType() const; |
1245 | |
1246 | /// Substitute type arguments for the Objective-C type parameters used in the |
1247 | /// subject type. |
1248 | /// |
1249 | /// \param ctx ASTContext in which the type exists. |
1250 | /// |
1251 | /// \param typeArgs The type arguments that will be substituted for the |
1252 | /// Objective-C type parameters in the subject type, which are generally |
1253 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
1254 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
1255 | /// for the context. |
1256 | /// |
1257 | /// \param context The context in which the subject type was written. |
1258 | /// |
1259 | /// \returns the resulting type. |
1260 | QualType substObjCTypeArgs(ASTContext &ctx, |
1261 | ArrayRef<QualType> typeArgs, |
1262 | ObjCSubstitutionContext context) const; |
1263 | |
1264 | /// Substitute type arguments from an object type for the Objective-C type |
1265 | /// parameters used in the subject type. |
1266 | /// |
1267 | /// This operation combines the computation of type arguments for |
1268 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
1269 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
1270 | /// callers that need to perform a single substitution in isolation. |
1271 | /// |
1272 | /// \param objectType The type of the object whose member type we're |
1273 | /// substituting into. For example, this might be the receiver of a message |
1274 | /// or the base of a property access. |
1275 | /// |
1276 | /// \param dc The declaration context from which the subject type was |
1277 | /// retrieved, which indicates (for example) which type parameters should |
1278 | /// be substituted. |
1279 | /// |
1280 | /// \param context The context in which the subject type was written. |
1281 | /// |
1282 | /// \returns the subject type after replacing all of the Objective-C type |
1283 | /// parameters with their corresponding arguments. |
1284 | QualType substObjCMemberType(QualType objectType, |
1285 | const DeclContext *dc, |
1286 | ObjCSubstitutionContext context) const; |
1287 | |
1288 | /// Strip Objective-C "__kindof" types from the given type. |
1289 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
1290 | |
1291 | /// Remove all qualifiers including _Atomic. |
1292 | QualType getAtomicUnqualifiedType() const; |
1293 | |
1294 | private: |
1295 | // These methods are implemented in a separate translation unit; |
1296 | // "static"-ize them to avoid creating temporary QualTypes in the |
1297 | // caller. |
1298 | static bool isConstant(QualType T, const ASTContext& Ctx); |
1299 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
1300 | static SplitQualType getSplitDesugaredType(QualType T); |
1301 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
1302 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
1303 | const ASTContext &C); |
1304 | static QualType IgnoreParens(QualType T); |
1305 | static DestructionKind isDestructedTypeImpl(QualType type); |
1306 | |
1307 | /// Check if \param RD is or contains a non-trivial C union. |
1308 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
1309 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
1310 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
1311 | }; |
1312 | |
1313 | } // namespace clang |
1314 | |
1315 | namespace llvm { |
1316 | |
1317 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
1318 | /// to a specific Type class. |
1319 | template<> struct simplify_type< ::clang::QualType> { |
1320 | using SimpleType = const ::clang::Type *; |
1321 | |
1322 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
1323 | return Val.getTypePtr(); |
1324 | } |
1325 | }; |
1326 | |
1327 | // Teach SmallPtrSet that QualType is "basically a pointer". |
1328 | template<> |
1329 | struct PointerLikeTypeTraits<clang::QualType> { |
1330 | static inline void *getAsVoidPointer(clang::QualType P) { |
1331 | return P.getAsOpaquePtr(); |
1332 | } |
1333 | |
1334 | static inline clang::QualType getFromVoidPointer(void *P) { |
1335 | return clang::QualType::getFromOpaquePtr(P); |
1336 | } |
1337 | |
1338 | // Various qualifiers go in low bits. |
1339 | static constexpr int NumLowBitsAvailable = 0; |
1340 | }; |
1341 | |
1342 | } // namespace llvm |
1343 | |
1344 | namespace clang { |
1345 | |
1346 | /// Base class that is common to both the \c ExtQuals and \c Type |
1347 | /// classes, which allows \c QualType to access the common fields between the |
1348 | /// two. |
1349 | class ExtQualsTypeCommonBase { |
1350 | friend class ExtQuals; |
1351 | friend class QualType; |
1352 | friend class Type; |
1353 | |
1354 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
1355 | /// a self-referential pointer (for \c Type). |
1356 | /// |
1357 | /// This pointer allows an efficient mapping from a QualType to its |
1358 | /// underlying type pointer. |
1359 | const Type *const BaseType; |
1360 | |
1361 | /// The canonical type of this type. A QualType. |
1362 | QualType CanonicalType; |
1363 | |
1364 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
1365 | : BaseType(baseType), CanonicalType(canon) {} |
1366 | }; |
1367 | |
1368 | /// We can encode up to four bits in the low bits of a |
1369 | /// type pointer, but there are many more type qualifiers that we want |
1370 | /// to be able to apply to an arbitrary type. Therefore we have this |
1371 | /// struct, intended to be heap-allocated and used by QualType to |
1372 | /// store qualifiers. |
1373 | /// |
1374 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
1375 | /// in three low bits on the QualType pointer; a fourth bit records whether |
1376 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
1377 | /// Objective-C GC attributes) are much more rare. |
1378 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
1379 | // NOTE: changing the fast qualifiers should be straightforward as |
1380 | // long as you don't make 'const' non-fast. |
1381 | // 1. Qualifiers: |
1382 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
1383 | // Fast qualifiers must occupy the low-order bits. |
1384 | // b) Update Qualifiers::FastWidth and FastMask. |
1385 | // 2. QualType: |
1386 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
1387 | // b) Update remove{Volatile,Restrict}, defined near the end of |
1388 | // this header. |
1389 | // 3. ASTContext: |
1390 | // a) Update get{Volatile,Restrict}Type. |
1391 | |
1392 | /// The immutable set of qualifiers applied by this node. Always contains |
1393 | /// extended qualifiers. |
1394 | Qualifiers Quals; |
1395 | |
1396 | ExtQuals *this_() { return this; } |
1397 | |
1398 | public: |
1399 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
1400 | : ExtQualsTypeCommonBase(baseType, |
1401 | canon.isNull() ? QualType(this_(), 0) : canon), |
1402 | Quals(quals) { |
1403 | assert(Quals.hasNonFastQualifiers()(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1404, __extension__ __PRETTY_FUNCTION__)) |
1404 | && "ExtQuals created with no fast qualifiers")(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1404, __extension__ __PRETTY_FUNCTION__)); |
1405 | assert(!Quals.hasFastQualifiers()(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1406, __extension__ __PRETTY_FUNCTION__)) |
1406 | && "ExtQuals created with fast qualifiers")(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1406, __extension__ __PRETTY_FUNCTION__)); |
1407 | } |
1408 | |
1409 | Qualifiers getQualifiers() const { return Quals; } |
1410 | |
1411 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
1412 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
1413 | |
1414 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
1415 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1416 | return Quals.getObjCLifetime(); |
1417 | } |
1418 | |
1419 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
1420 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
1421 | |
1422 | const Type *getBaseType() const { return BaseType; } |
1423 | |
1424 | public: |
1425 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1426 | Profile(ID, getBaseType(), Quals); |
1427 | } |
1428 | |
1429 | static void Profile(llvm::FoldingSetNodeID &ID, |
1430 | const Type *BaseType, |
1431 | Qualifiers Quals) { |
1432 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")(static_cast <bool> (!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1432, __extension__ __PRETTY_FUNCTION__)); |
1433 | ID.AddPointer(BaseType); |
1434 | Quals.Profile(ID); |
1435 | } |
1436 | }; |
1437 | |
1438 | /// The kind of C++11 ref-qualifier associated with a function type. |
1439 | /// This determines whether a member function's "this" object can be an |
1440 | /// lvalue, rvalue, or neither. |
1441 | enum RefQualifierKind { |
1442 | /// No ref-qualifier was provided. |
1443 | RQ_None = 0, |
1444 | |
1445 | /// An lvalue ref-qualifier was provided (\c &). |
1446 | RQ_LValue, |
1447 | |
1448 | /// An rvalue ref-qualifier was provided (\c &&). |
1449 | RQ_RValue |
1450 | }; |
1451 | |
1452 | /// Which keyword(s) were used to create an AutoType. |
1453 | enum class AutoTypeKeyword { |
1454 | /// auto |
1455 | Auto, |
1456 | |
1457 | /// decltype(auto) |
1458 | DecltypeAuto, |
1459 | |
1460 | /// __auto_type (GNU extension) |
1461 | GNUAutoType |
1462 | }; |
1463 | |
1464 | /// The base class of the type hierarchy. |
1465 | /// |
1466 | /// A central concept with types is that each type always has a canonical |
1467 | /// type. A canonical type is the type with any typedef names stripped out |
1468 | /// of it or the types it references. For example, consider: |
1469 | /// |
1470 | /// typedef int foo; |
1471 | /// typedef foo* bar; |
1472 | /// 'int *' 'foo *' 'bar' |
1473 | /// |
1474 | /// There will be a Type object created for 'int'. Since int is canonical, its |
1475 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
1476 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
1477 | /// there is a PointerType that represents 'int*', which, like 'int', is |
1478 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
1479 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
1480 | /// is also 'int*'. |
1481 | /// |
1482 | /// Non-canonical types are useful for emitting diagnostics, without losing |
1483 | /// information about typedefs being used. Canonical types are useful for type |
1484 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
1485 | /// about whether something has a particular form (e.g. is a function type), |
1486 | /// because they implicitly, recursively, strip all typedefs out of a type. |
1487 | /// |
1488 | /// Types, once created, are immutable. |
1489 | /// |
1490 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
1491 | public: |
1492 | enum TypeClass { |
1493 | #define TYPE(Class, Base) Class, |
1494 | #define LAST_TYPE(Class) TypeLast = Class |
1495 | #define ABSTRACT_TYPE(Class, Base) |
1496 | #include "clang/AST/TypeNodes.inc" |
1497 | }; |
1498 | |
1499 | private: |
1500 | /// Bitfields required by the Type class. |
1501 | class TypeBitfields { |
1502 | friend class Type; |
1503 | template <class T> friend class TypePropertyCache; |
1504 | |
1505 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
1506 | unsigned TC : 8; |
1507 | |
1508 | /// Store information on the type dependency. |
1509 | unsigned Dependence : llvm::BitWidth<TypeDependence>; |
1510 | |
1511 | /// True if the cache (i.e. the bitfields here starting with |
1512 | /// 'Cache') is valid. |
1513 | mutable unsigned CacheValid : 1; |
1514 | |
1515 | /// Linkage of this type. |
1516 | mutable unsigned CachedLinkage : 3; |
1517 | |
1518 | /// Whether this type involves and local or unnamed types. |
1519 | mutable unsigned CachedLocalOrUnnamed : 1; |
1520 | |
1521 | /// Whether this type comes from an AST file. |
1522 | mutable unsigned FromAST : 1; |
1523 | |
1524 | bool isCacheValid() const { |
1525 | return CacheValid; |
1526 | } |
1527 | |
1528 | Linkage getLinkage() const { |
1529 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1529, __extension__ __PRETTY_FUNCTION__)); |
1530 | return static_cast<Linkage>(CachedLinkage); |
1531 | } |
1532 | |
1533 | bool hasLocalOrUnnamedType() const { |
1534 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1534, __extension__ __PRETTY_FUNCTION__)); |
1535 | return CachedLocalOrUnnamed; |
1536 | } |
1537 | }; |
1538 | enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 }; |
1539 | |
1540 | protected: |
1541 | // These classes allow subclasses to somewhat cleanly pack bitfields |
1542 | // into Type. |
1543 | |
1544 | class ArrayTypeBitfields { |
1545 | friend class ArrayType; |
1546 | |
1547 | unsigned : NumTypeBits; |
1548 | |
1549 | /// CVR qualifiers from declarations like |
1550 | /// 'int X[static restrict 4]'. For function parameters only. |
1551 | unsigned IndexTypeQuals : 3; |
1552 | |
1553 | /// Storage class qualifiers from declarations like |
1554 | /// 'int X[static restrict 4]'. For function parameters only. |
1555 | /// Actually an ArrayType::ArraySizeModifier. |
1556 | unsigned SizeModifier : 3; |
1557 | }; |
1558 | |
1559 | class ConstantArrayTypeBitfields { |
1560 | friend class ConstantArrayType; |
1561 | |
1562 | unsigned : NumTypeBits + 3 + 3; |
1563 | |
1564 | /// Whether we have a stored size expression. |
1565 | unsigned HasStoredSizeExpr : 1; |
1566 | }; |
1567 | |
1568 | class BuiltinTypeBitfields { |
1569 | friend class BuiltinType; |
1570 | |
1571 | unsigned : NumTypeBits; |
1572 | |
1573 | /// The kind (BuiltinType::Kind) of builtin type this is. |
1574 | unsigned Kind : 8; |
1575 | }; |
1576 | |
1577 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
1578 | /// Only common bits are stored here. Additional uncommon bits are stored |
1579 | /// in a trailing object after FunctionProtoType. |
1580 | class FunctionTypeBitfields { |
1581 | friend class FunctionProtoType; |
1582 | friend class FunctionType; |
1583 | |
1584 | unsigned : NumTypeBits; |
1585 | |
1586 | /// Extra information which affects how the function is called, like |
1587 | /// regparm and the calling convention. |
1588 | unsigned ExtInfo : 13; |
1589 | |
1590 | /// The ref-qualifier associated with a \c FunctionProtoType. |
1591 | /// |
1592 | /// This is a value of type \c RefQualifierKind. |
1593 | unsigned RefQualifier : 2; |
1594 | |
1595 | /// Used only by FunctionProtoType, put here to pack with the |
1596 | /// other bitfields. |
1597 | /// The qualifiers are part of FunctionProtoType because... |
1598 | /// |
1599 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
1600 | /// cv-qualifier-seq, [...], are part of the function type. |
1601 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
1602 | /// Whether this function has extended Qualifiers. |
1603 | unsigned HasExtQuals : 1; |
1604 | |
1605 | /// The number of parameters this function has, not counting '...'. |
1606 | /// According to [implimits] 8 bits should be enough here but this is |
1607 | /// somewhat easy to exceed with metaprogramming and so we would like to |
1608 | /// keep NumParams as wide as reasonably possible. |
1609 | unsigned NumParams : 16; |
1610 | |
1611 | /// The type of exception specification this function has. |
1612 | unsigned ExceptionSpecType : 4; |
1613 | |
1614 | /// Whether this function has extended parameter information. |
1615 | unsigned HasExtParameterInfos : 1; |
1616 | |
1617 | /// Whether the function is variadic. |
1618 | unsigned Variadic : 1; |
1619 | |
1620 | /// Whether this function has a trailing return type. |
1621 | unsigned HasTrailingReturn : 1; |
1622 | }; |
1623 | |
1624 | class ObjCObjectTypeBitfields { |
1625 | friend class ObjCObjectType; |
1626 | |
1627 | unsigned : NumTypeBits; |
1628 | |
1629 | /// The number of type arguments stored directly on this object type. |
1630 | unsigned NumTypeArgs : 7; |
1631 | |
1632 | /// The number of protocols stored directly on this object type. |
1633 | unsigned NumProtocols : 6; |
1634 | |
1635 | /// Whether this is a "kindof" type. |
1636 | unsigned IsKindOf : 1; |
1637 | }; |
1638 | |
1639 | class ReferenceTypeBitfields { |
1640 | friend class ReferenceType; |
1641 | |
1642 | unsigned : NumTypeBits; |
1643 | |
1644 | /// True if the type was originally spelled with an lvalue sigil. |
1645 | /// This is never true of rvalue references but can also be false |
1646 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
1647 | /// as follows: |
1648 | /// |
1649 | /// typedef int &ref; // lvalue, spelled lvalue |
1650 | /// typedef int &&rvref; // rvalue |
1651 | /// ref &a; // lvalue, inner ref, spelled lvalue |
1652 | /// ref &&a; // lvalue, inner ref |
1653 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
1654 | /// rvref &&a; // rvalue, inner ref |
1655 | unsigned SpelledAsLValue : 1; |
1656 | |
1657 | /// True if the inner type is a reference type. This only happens |
1658 | /// in non-canonical forms. |
1659 | unsigned InnerRef : 1; |
1660 | }; |
1661 | |
1662 | class TypeWithKeywordBitfields { |
1663 | friend class TypeWithKeyword; |
1664 | |
1665 | unsigned : NumTypeBits; |
1666 | |
1667 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
1668 | unsigned Keyword : 8; |
1669 | }; |
1670 | |
1671 | enum { NumTypeWithKeywordBits = 8 }; |
1672 | |
1673 | class ElaboratedTypeBitfields { |
1674 | friend class ElaboratedType; |
1675 | |
1676 | unsigned : NumTypeBits; |
1677 | unsigned : NumTypeWithKeywordBits; |
1678 | |
1679 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
1680 | unsigned HasOwnedTagDecl : 1; |
1681 | }; |
1682 | |
1683 | class VectorTypeBitfields { |
1684 | friend class VectorType; |
1685 | friend class DependentVectorType; |
1686 | |
1687 | unsigned : NumTypeBits; |
1688 | |
1689 | /// The kind of vector, either a generic vector type or some |
1690 | /// target-specific vector type such as for AltiVec or Neon. |
1691 | unsigned VecKind : 3; |
1692 | /// The number of elements in the vector. |
1693 | uint32_t NumElements; |
1694 | }; |
1695 | |
1696 | class AttributedTypeBitfields { |
1697 | friend class AttributedType; |
1698 | |
1699 | unsigned : NumTypeBits; |
1700 | |
1701 | /// An AttributedType::Kind |
1702 | unsigned AttrKind : 32 - NumTypeBits; |
1703 | }; |
1704 | |
1705 | class AutoTypeBitfields { |
1706 | friend class AutoType; |
1707 | |
1708 | unsigned : NumTypeBits; |
1709 | |
1710 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
1711 | /// or '__auto_type'? AutoTypeKeyword value. |
1712 | unsigned Keyword : 2; |
1713 | |
1714 | /// The number of template arguments in the type-constraints, which is |
1715 | /// expected to be able to hold at least 1024 according to [implimits]. |
1716 | /// However as this limit is somewhat easy to hit with template |
1717 | /// metaprogramming we'd prefer to keep it as large as possible. |
1718 | /// At the moment it has been left as a non-bitfield since this type |
1719 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1720 | /// introduce the performance impact of a bitfield. |
1721 | unsigned NumArgs; |
1722 | }; |
1723 | |
1724 | class SubstTemplateTypeParmPackTypeBitfields { |
1725 | friend class SubstTemplateTypeParmPackType; |
1726 | |
1727 | unsigned : NumTypeBits; |
1728 | |
1729 | /// The number of template arguments in \c Arguments, which is |
1730 | /// expected to be able to hold at least 1024 according to [implimits]. |
1731 | /// However as this limit is somewhat easy to hit with template |
1732 | /// metaprogramming we'd prefer to keep it as large as possible. |
1733 | /// At the moment it has been left as a non-bitfield since this type |
1734 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1735 | /// introduce the performance impact of a bitfield. |
1736 | unsigned NumArgs; |
1737 | }; |
1738 | |
1739 | class TemplateSpecializationTypeBitfields { |
1740 | friend class TemplateSpecializationType; |
1741 | |
1742 | unsigned : NumTypeBits; |
1743 | |
1744 | /// Whether this template specialization type is a substituted type alias. |
1745 | unsigned TypeAlias : 1; |
1746 | |
1747 | /// The number of template arguments named in this class template |
1748 | /// specialization, which is expected to be able to hold at least 1024 |
1749 | /// according to [implimits]. However, as this limit is somewhat easy to |
1750 | /// hit with template metaprogramming we'd prefer to keep it as large |
1751 | /// as possible. At the moment it has been left as a non-bitfield since |
1752 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1753 | /// to introduce the performance impact of a bitfield. |
1754 | unsigned NumArgs; |
1755 | }; |
1756 | |
1757 | class DependentTemplateSpecializationTypeBitfields { |
1758 | friend class DependentTemplateSpecializationType; |
1759 | |
1760 | unsigned : NumTypeBits; |
1761 | unsigned : NumTypeWithKeywordBits; |
1762 | |
1763 | /// The number of template arguments named in this class template |
1764 | /// specialization, which is expected to be able to hold at least 1024 |
1765 | /// according to [implimits]. However, as this limit is somewhat easy to |
1766 | /// hit with template metaprogramming we'd prefer to keep it as large |
1767 | /// as possible. At the moment it has been left as a non-bitfield since |
1768 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1769 | /// to introduce the performance impact of a bitfield. |
1770 | unsigned NumArgs; |
1771 | }; |
1772 | |
1773 | class PackExpansionTypeBitfields { |
1774 | friend class PackExpansionType; |
1775 | |
1776 | unsigned : NumTypeBits; |
1777 | |
1778 | /// The number of expansions that this pack expansion will |
1779 | /// generate when substituted (+1), which is expected to be able to |
1780 | /// hold at least 1024 according to [implimits]. However, as this limit |
1781 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
1782 | /// keep it as large as possible. At the moment it has been left as a |
1783 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
1784 | /// there is no reason to introduce the performance impact of a bitfield. |
1785 | /// |
1786 | /// This field will only have a non-zero value when some of the parameter |
1787 | /// packs that occur within the pattern have been substituted but others |
1788 | /// have not. |
1789 | unsigned NumExpansions; |
1790 | }; |
1791 | |
1792 | union { |
1793 | TypeBitfields TypeBits; |
1794 | ArrayTypeBitfields ArrayTypeBits; |
1795 | ConstantArrayTypeBitfields ConstantArrayTypeBits; |
1796 | AttributedTypeBitfields AttributedTypeBits; |
1797 | AutoTypeBitfields AutoTypeBits; |
1798 | BuiltinTypeBitfields BuiltinTypeBits; |
1799 | FunctionTypeBitfields FunctionTypeBits; |
1800 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
1801 | ReferenceTypeBitfields ReferenceTypeBits; |
1802 | TypeWithKeywordBitfields TypeWithKeywordBits; |
1803 | ElaboratedTypeBitfields ElaboratedTypeBits; |
1804 | VectorTypeBitfields VectorTypeBits; |
1805 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
1806 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
1807 | DependentTemplateSpecializationTypeBitfields |
1808 | DependentTemplateSpecializationTypeBits; |
1809 | PackExpansionTypeBitfields PackExpansionTypeBits; |
1810 | }; |
1811 | |
1812 | private: |
1813 | template <class T> friend class TypePropertyCache; |
1814 | |
1815 | /// Set whether this type comes from an AST file. |
1816 | void setFromAST(bool V = true) const { |
1817 | TypeBits.FromAST = V; |
1818 | } |
1819 | |
1820 | protected: |
1821 | friend class ASTContext; |
1822 | |
1823 | Type(TypeClass tc, QualType canon, TypeDependence Dependence) |
1824 | : ExtQualsTypeCommonBase(this, |
1825 | canon.isNull() ? QualType(this_(), 0) : canon) { |
1826 | static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase), |
1827 | "changing bitfields changed sizeof(Type)!"); |
1828 | static_assert(alignof(decltype(*this)) % sizeof(void *) == 0, |
1829 | "Insufficient alignment!"); |
1830 | TypeBits.TC = tc; |
1831 | TypeBits.Dependence = static_cast<unsigned>(Dependence); |
1832 | TypeBits.CacheValid = false; |
1833 | TypeBits.CachedLocalOrUnnamed = false; |
1834 | TypeBits.CachedLinkage = NoLinkage; |
1835 | TypeBits.FromAST = false; |
1836 | } |
1837 | |
1838 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
1839 | Type *this_() { return this; } |
1840 | |
1841 | void setDependence(TypeDependence D) { |
1842 | TypeBits.Dependence = static_cast<unsigned>(D); |
1843 | } |
1844 | |
1845 | void addDependence(TypeDependence D) { setDependence(getDependence() | D); } |
1846 | |
1847 | public: |
1848 | friend class ASTReader; |
1849 | friend class ASTWriter; |
1850 | template <class T> friend class serialization::AbstractTypeReader; |
1851 | template <class T> friend class serialization::AbstractTypeWriter; |
1852 | |
1853 | Type(const Type &) = delete; |
1854 | Type(Type &&) = delete; |
1855 | Type &operator=(const Type &) = delete; |
1856 | Type &operator=(Type &&) = delete; |
1857 | |
1858 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
1859 | |
1860 | /// Whether this type comes from an AST file. |
1861 | bool isFromAST() const { return TypeBits.FromAST; } |
1862 | |
1863 | /// Whether this type is or contains an unexpanded parameter |
1864 | /// pack, used to support C++0x variadic templates. |
1865 | /// |
1866 | /// A type that contains a parameter pack shall be expanded by the |
1867 | /// ellipsis operator at some point. For example, the typedef in the |
1868 | /// following example contains an unexpanded parameter pack 'T': |
1869 | /// |
1870 | /// \code |
1871 | /// template<typename ...T> |
1872 | /// struct X { |
1873 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
1874 | /// }; |
1875 | /// \endcode |
1876 | /// |
1877 | /// Note that this routine does not specify which |
1878 | bool containsUnexpandedParameterPack() const { |
1879 | return getDependence() & TypeDependence::UnexpandedPack; |
1880 | } |
1881 | |
1882 | /// Determines if this type would be canonical if it had no further |
1883 | /// qualification. |
1884 | bool isCanonicalUnqualified() const { |
1885 | return CanonicalType == QualType(this, 0); |
1886 | } |
1887 | |
1888 | /// Pull a single level of sugar off of this locally-unqualified type. |
1889 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
1890 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
1891 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
1892 | |
1893 | /// As an extension, we classify types as one of "sized" or "sizeless"; |
1894 | /// every type is one or the other. Standard types are all sized; |
1895 | /// sizeless types are purely an extension. |
1896 | /// |
1897 | /// Sizeless types contain data with no specified size, alignment, |
1898 | /// or layout. |
1899 | bool isSizelessType() const; |
1900 | bool isSizelessBuiltinType() const; |
1901 | |
1902 | /// Determines if this is a sizeless type supported by the |
1903 | /// 'arm_sve_vector_bits' type attribute, which can be applied to a single |
1904 | /// SVE vector or predicate, excluding tuple types such as svint32x4_t. |
1905 | bool isVLSTBuiltinType() const; |
1906 | |
1907 | /// Returns the representative type for the element of an SVE builtin type. |
1908 | /// This is used to represent fixed-length SVE vectors created with the |
1909 | /// 'arm_sve_vector_bits' type attribute as VectorType. |
1910 | QualType getSveEltType(const ASTContext &Ctx) const; |
1911 | |
1912 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
1913 | /// object types, function types, and incomplete types. |
1914 | |
1915 | /// Return true if this is an incomplete type. |
1916 | /// A type that can describe objects, but which lacks information needed to |
1917 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
1918 | /// routine will need to determine if the size is actually required. |
1919 | /// |
1920 | /// Def If non-null, and the type refers to some kind of declaration |
1921 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
1922 | /// class), will be set to the declaration. |
1923 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
1924 | |
1925 | /// Return true if this is an incomplete or object |
1926 | /// type, in other words, not a function type. |
1927 | bool isIncompleteOrObjectType() const { |
1928 | return !isFunctionType(); |
1929 | } |
1930 | |
1931 | /// Determine whether this type is an object type. |
1932 | bool isObjectType() const { |
1933 | // C++ [basic.types]p8: |
1934 | // An object type is a (possibly cv-qualified) type that is not a |
1935 | // function type, not a reference type, and not a void type. |
1936 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
1937 | } |
1938 | |
1939 | /// Return true if this is a literal type |
1940 | /// (C++11 [basic.types]p10) |
1941 | bool isLiteralType(const ASTContext &Ctx) const; |
1942 | |
1943 | /// Determine if this type is a structural type, per C++20 [temp.param]p7. |
1944 | bool isStructuralType() const; |
1945 | |
1946 | /// Test if this type is a standard-layout type. |
1947 | /// (C++0x [basic.type]p9) |
1948 | bool isStandardLayoutType() const; |
1949 | |
1950 | /// Helper methods to distinguish type categories. All type predicates |
1951 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
1952 | |
1953 | /// Returns true if the type is a builtin type. |
1954 | bool isBuiltinType() const; |
1955 | |
1956 | /// Test for a particular builtin type. |
1957 | bool isSpecificBuiltinType(unsigned K) const; |
1958 | |
1959 | /// Test for a type which does not represent an actual type-system type but |
1960 | /// is instead used as a placeholder for various convenient purposes within |
1961 | /// Clang. All such types are BuiltinTypes. |
1962 | bool isPlaceholderType() const; |
1963 | const BuiltinType *getAsPlaceholderType() const; |
1964 | |
1965 | /// Test for a specific placeholder type. |
1966 | bool isSpecificPlaceholderType(unsigned K) const; |
1967 | |
1968 | /// Test for a placeholder type other than Overload; see |
1969 | /// BuiltinType::isNonOverloadPlaceholderType. |
1970 | bool isNonOverloadPlaceholderType() const; |
1971 | |
1972 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
1973 | /// isComplexIntegerType() can be used to test for complex integers. |
1974 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
1975 | bool isEnumeralType() const; |
1976 | |
1977 | /// Determine whether this type is a scoped enumeration type. |
1978 | bool isScopedEnumeralType() const; |
1979 | bool isBooleanType() const; |
1980 | bool isCharType() const; |
1981 | bool isWideCharType() const; |
1982 | bool isChar8Type() const; |
1983 | bool isChar16Type() const; |
1984 | bool isChar32Type() const; |
1985 | bool isAnyCharacterType() const; |
1986 | bool isIntegralType(const ASTContext &Ctx) const; |
1987 | |
1988 | /// Determine whether this type is an integral or enumeration type. |
1989 | bool isIntegralOrEnumerationType() const; |
1990 | |
1991 | /// Determine whether this type is an integral or unscoped enumeration type. |
1992 | bool isIntegralOrUnscopedEnumerationType() const; |
1993 | bool isUnscopedEnumerationType() const; |
1994 | |
1995 | /// Floating point categories. |
1996 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
1997 | /// isComplexType() does *not* include complex integers (a GCC extension). |
1998 | /// isComplexIntegerType() can be used to test for complex integers. |
1999 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
2000 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
2001 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
2002 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
2003 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
2004 | bool isBFloat16Type() const; |
2005 | bool isFloat128Type() const; |
2006 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
2007 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
2008 | bool isVoidType() const; // C99 6.2.5p19 |
2009 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
2010 | bool isAggregateType() const; |
2011 | bool isFundamentalType() const; |
2012 | bool isCompoundType() const; |
2013 | |
2014 | // Type Predicates: Check to see if this type is structurally the specified |
2015 | // type, ignoring typedefs and qualifiers. |
2016 | bool isFunctionType() const; |
2017 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
2018 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
2019 | bool isPointerType() const; |
2020 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
2021 | bool isBlockPointerType() const; |
2022 | bool isVoidPointerType() const; |
2023 | bool isReferenceType() const; |
2024 | bool isLValueReferenceType() const; |
2025 | bool isRValueReferenceType() const; |
2026 | bool isObjectPointerType() const; |
2027 | bool isFunctionPointerType() const; |
2028 | bool isFunctionReferenceType() const; |
2029 | bool isMemberPointerType() const; |
2030 | bool isMemberFunctionPointerType() const; |
2031 | bool isMemberDataPointerType() const; |
2032 | bool isArrayType() const; |
2033 | bool isConstantArrayType() const; |
2034 | bool isIncompleteArrayType() const; |
2035 | bool isVariableArrayType() const; |
2036 | bool isDependentSizedArrayType() const; |
2037 | bool isRecordType() const; |
2038 | bool isClassType() const; |
2039 | bool isStructureType() const; |
2040 | bool isObjCBoxableRecordType() const; |
2041 | bool isInterfaceType() const; |
2042 | bool isStructureOrClassType() const; |
2043 | bool isUnionType() const; |
2044 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
2045 | bool isVectorType() const; // GCC vector type. |
2046 | bool isExtVectorType() const; // Extended vector type. |
2047 | bool isMatrixType() const; // Matrix type. |
2048 | bool isConstantMatrixType() const; // Constant matrix type. |
2049 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
2050 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
2051 | bool isObjCRetainableType() const; // ObjC object or block pointer |
2052 | bool isObjCLifetimeType() const; // (array of)* retainable type |
2053 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
2054 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
2055 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
2056 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
2057 | // for the common case. |
2058 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
2059 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
2060 | bool isObjCQualifiedIdType() const; // id<foo> |
2061 | bool isObjCQualifiedClassType() const; // Class<foo> |
2062 | bool isObjCObjectOrInterfaceType() const; |
2063 | bool isObjCIdType() const; // id |
2064 | bool isDecltypeType() const; |
2065 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
2066 | /// qualifier? |
2067 | /// |
2068 | /// This approximates the answer to the following question: if this |
2069 | /// translation unit were compiled in ARC, would this type be qualified |
2070 | /// with __unsafe_unretained? |
2071 | bool isObjCInertUnsafeUnretainedType() const { |
2072 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
2073 | } |
2074 | |
2075 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
2076 | /// object type, e.g., __kindof NSView * or __kindof id |
2077 | /// <NSCopying>. |
2078 | /// |
2079 | /// \param bound Will be set to the bound on non-id subtype types, |
2080 | /// which will be (possibly specialized) Objective-C class type, or |
2081 | /// null for 'id. |
2082 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
2083 | const ObjCObjectType *&bound) const; |
2084 | |
2085 | bool isObjCClassType() const; // Class |
2086 | |
2087 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
2088 | /// Class type, e.g., __kindof Class <NSCopying>. |
2089 | /// |
2090 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
2091 | /// here because Objective-C's type system cannot express "a class |
2092 | /// object for a subclass of NSFoo". |
2093 | bool isObjCClassOrClassKindOfType() const; |
2094 | |
2095 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
2096 | bool isObjCSelType() const; // Class |
2097 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
2098 | bool isObjCARCBridgableType() const; |
2099 | bool isCARCBridgableType() const; |
2100 | bool isTemplateTypeParmType() const; // C++ template type parameter |
2101 | bool isNullPtrType() const; // C++11 std::nullptr_t |
2102 | bool isNothrowT() const; // C++ std::nothrow_t |
2103 | bool isAlignValT() const; // C++17 std::align_val_t |
2104 | bool isStdByteType() const; // C++17 std::byte |
2105 | bool isAtomicType() const; // C11 _Atomic() |
2106 | bool isUndeducedAutoType() const; // C++11 auto or |
2107 | // C++14 decltype(auto) |
2108 | bool isTypedefNameType() const; // typedef or alias template |
2109 | |
2110 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
2111 | bool is##Id##Type() const; |
2112 | #include "clang/Basic/OpenCLImageTypes.def" |
2113 | |
2114 | bool isImageType() const; // Any OpenCL image type |
2115 | |
2116 | bool isSamplerT() const; // OpenCL sampler_t |
2117 | bool isEventT() const; // OpenCL event_t |
2118 | bool isClkEventT() const; // OpenCL clk_event_t |
2119 | bool isQueueT() const; // OpenCL queue_t |
2120 | bool isReserveIDT() const; // OpenCL reserve_id_t |
2121 | |
2122 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
2123 | bool is##Id##Type() const; |
2124 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2125 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
2126 | bool isOCLIntelSubgroupAVCType() const; |
2127 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
2128 | |
2129 | bool isPipeType() const; // OpenCL pipe type |
2130 | bool isExtIntType() const; // Extended Int Type |
2131 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
2132 | |
2133 | /// Determines if this type, which must satisfy |
2134 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
2135 | /// than implicitly __strong. |
2136 | bool isObjCARCImplicitlyUnretainedType() const; |
2137 | |
2138 | /// Check if the type is the CUDA device builtin surface type. |
2139 | bool isCUDADeviceBuiltinSurfaceType() const; |
2140 | /// Check if the type is the CUDA device builtin texture type. |
2141 | bool isCUDADeviceBuiltinTextureType() const; |
2142 | |
2143 | /// Return the implicit lifetime for this type, which must not be dependent. |
2144 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
2145 | |
2146 | enum ScalarTypeKind { |
2147 | STK_CPointer, |
2148 | STK_BlockPointer, |
2149 | STK_ObjCObjectPointer, |
2150 | STK_MemberPointer, |
2151 | STK_Bool, |
2152 | STK_Integral, |
2153 | STK_Floating, |
2154 | STK_IntegralComplex, |
2155 | STK_FloatingComplex, |
2156 | STK_FixedPoint |
2157 | }; |
2158 | |
2159 | /// Given that this is a scalar type, classify it. |
2160 | ScalarTypeKind getScalarTypeKind() const; |
2161 | |
2162 | TypeDependence getDependence() const { |
2163 | return static_cast<TypeDependence>(TypeBits.Dependence); |
2164 | } |
2165 | |
2166 | /// Whether this type is an error type. |
2167 | bool containsErrors() const { |
2168 | return getDependence() & TypeDependence::Error; |
2169 | } |
2170 | |
2171 | /// Whether this type is a dependent type, meaning that its definition |
2172 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
2173 | bool isDependentType() const { |
2174 | return getDependence() & TypeDependence::Dependent; |
2175 | } |
2176 | |
2177 | /// Determine whether this type is an instantiation-dependent type, |
2178 | /// meaning that the type involves a template parameter (even if the |
2179 | /// definition does not actually depend on the type substituted for that |
2180 | /// template parameter). |
2181 | bool isInstantiationDependentType() const { |
2182 | return getDependence() & TypeDependence::Instantiation; |
2183 | } |
2184 | |
2185 | /// Determine whether this type is an undeduced type, meaning that |
2186 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
2187 | /// deduced. |
2188 | bool isUndeducedType() const; |
2189 | |
2190 | /// Whether this type is a variably-modified type (C99 6.7.5). |
2191 | bool isVariablyModifiedType() const { |
2192 | return getDependence() & TypeDependence::VariablyModified; |
2193 | } |
2194 | |
2195 | /// Whether this type involves a variable-length array type |
2196 | /// with a definite size. |
2197 | bool hasSizedVLAType() const; |
2198 | |
2199 | /// Whether this type is or contains a local or unnamed type. |
2200 | bool hasUnnamedOrLocalType() const; |
2201 | |
2202 | bool isOverloadableType() const; |
2203 | |
2204 | /// Determine wither this type is a C++ elaborated-type-specifier. |
2205 | bool isElaboratedTypeSpecifier() const; |
2206 | |
2207 | bool canDecayToPointerType() const; |
2208 | |
2209 | /// Whether this type is represented natively as a pointer. This includes |
2210 | /// pointers, references, block pointers, and Objective-C interface, |
2211 | /// qualified id, and qualified interface types, as well as nullptr_t. |
2212 | bool hasPointerRepresentation() const; |
2213 | |
2214 | /// Whether this type can represent an objective pointer type for the |
2215 | /// purpose of GC'ability |
2216 | bool hasObjCPointerRepresentation() const; |
2217 | |
2218 | /// Determine whether this type has an integer representation |
2219 | /// of some sort, e.g., it is an integer type or a vector. |
2220 | bool hasIntegerRepresentation() const; |
2221 | |
2222 | /// Determine whether this type has an signed integer representation |
2223 | /// of some sort, e.g., it is an signed integer type or a vector. |
2224 | bool hasSignedIntegerRepresentation() const; |
2225 | |
2226 | /// Determine whether this type has an unsigned integer representation |
2227 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
2228 | bool hasUnsignedIntegerRepresentation() const; |
2229 | |
2230 | /// Determine whether this type has a floating-point representation |
2231 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
2232 | bool hasFloatingRepresentation() const; |
2233 | |
2234 | // Type Checking Functions: Check to see if this type is structurally the |
2235 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
2236 | // the best type we can. |
2237 | const RecordType *getAsStructureType() const; |
2238 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
2239 | const RecordType *getAsUnionType() const; |
2240 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
2241 | const ObjCObjectType *getAsObjCInterfaceType() const; |
2242 | |
2243 | // The following is a convenience method that returns an ObjCObjectPointerType |
2244 | // for object declared using an interface. |
2245 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
2246 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
2247 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
2248 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
2249 | |
2250 | /// Retrieves the CXXRecordDecl that this type refers to, either |
2251 | /// because the type is a RecordType or because it is the injected-class-name |
2252 | /// type of a class template or class template partial specialization. |
2253 | CXXRecordDecl *getAsCXXRecordDecl() const; |
2254 | |
2255 | /// Retrieves the RecordDecl this type refers to. |
2256 | RecordDecl *getAsRecordDecl() const; |
2257 | |
2258 | /// Retrieves the TagDecl that this type refers to, either |
2259 | /// because the type is a TagType or because it is the injected-class-name |
2260 | /// type of a class template or class template partial specialization. |
2261 | TagDecl *getAsTagDecl() const; |
2262 | |
2263 | /// If this is a pointer or reference to a RecordType, return the |
2264 | /// CXXRecordDecl that the type refers to. |
2265 | /// |
2266 | /// If this is not a pointer or reference, or the type being pointed to does |
2267 | /// not refer to a CXXRecordDecl, returns NULL. |
2268 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
2269 | |
2270 | /// Get the DeducedType whose type will be deduced for a variable with |
2271 | /// an initializer of this type. This looks through declarators like pointer |
2272 | /// types, but not through decltype or typedefs. |
2273 | DeducedType *getContainedDeducedType() const; |
2274 | |
2275 | /// Get the AutoType whose type will be deduced for a variable with |
2276 | /// an initializer of this type. This looks through declarators like pointer |
2277 | /// types, but not through decltype or typedefs. |
2278 | AutoType *getContainedAutoType() const { |
2279 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
2280 | } |
2281 | |
2282 | /// Determine whether this type was written with a leading 'auto' |
2283 | /// corresponding to a trailing return type (possibly for a nested |
2284 | /// function type within a pointer to function type or similar). |
2285 | bool hasAutoForTrailingReturnType() const; |
2286 | |
2287 | /// Member-template getAs<specific type>'. Look through sugar for |
2288 | /// an instance of \<specific type>. This scheme will eventually |
2289 | /// replace the specific getAsXXXX methods above. |
2290 | /// |
2291 | /// There are some specializations of this member template listed |
2292 | /// immediately following this class. |
2293 | template <typename T> const T *getAs() const; |
2294 | |
2295 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
2296 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
2297 | /// This is used when you need to walk over sugar nodes that represent some |
2298 | /// kind of type adjustment from a type that was written as a \<specific type> |
2299 | /// to another type that is still canonically a \<specific type>. |
2300 | template <typename T> const T *getAsAdjusted() const; |
2301 | |
2302 | /// A variant of getAs<> for array types which silently discards |
2303 | /// qualifiers from the outermost type. |
2304 | const ArrayType *getAsArrayTypeUnsafe() const; |
2305 | |
2306 | /// Member-template castAs<specific type>. Look through sugar for |
2307 | /// the underlying instance of \<specific type>. |
2308 | /// |
2309 | /// This method has the same relationship to getAs<T> as cast<T> has |
2310 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
2311 | /// have the intended type, and this method will never return null. |
2312 | template <typename T> const T *castAs() const; |
2313 | |
2314 | /// A variant of castAs<> for array type which silently discards |
2315 | /// qualifiers from the outermost type. |
2316 | const ArrayType *castAsArrayTypeUnsafe() const; |
2317 | |
2318 | /// Determine whether this type had the specified attribute applied to it |
2319 | /// (looking through top-level type sugar). |
2320 | bool hasAttr(attr::Kind AK) const; |
2321 | |
2322 | /// Get the base element type of this type, potentially discarding type |
2323 | /// qualifiers. This should never be used when type qualifiers |
2324 | /// are meaningful. |
2325 | const Type *getBaseElementTypeUnsafe() const; |
2326 | |
2327 | /// If this is an array type, return the element type of the array, |
2328 | /// potentially with type qualifiers missing. |
2329 | /// This should never be used when type qualifiers are meaningful. |
2330 | const Type *getArrayElementTypeNoTypeQual() const; |
2331 | |
2332 | /// If this is a pointer type, return the pointee type. |
2333 | /// If this is an array type, return the array element type. |
2334 | /// This should never be used when type qualifiers are meaningful. |
2335 | const Type *getPointeeOrArrayElementType() const; |
2336 | |
2337 | /// If this is a pointer, ObjC object pointer, or block |
2338 | /// pointer, this returns the respective pointee. |
2339 | QualType getPointeeType() const; |
2340 | |
2341 | /// Return the specified type with any "sugar" removed from the type, |
2342 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
2343 | const Type *getUnqualifiedDesugaredType() const; |
2344 | |
2345 | /// More type predicates useful for type checking/promotion |
2346 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
2347 | |
2348 | /// Return true if this is an integer type that is |
2349 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
2350 | /// or an enum decl which has a signed representation. |
2351 | bool isSignedIntegerType() const; |
2352 | |
2353 | /// Return true if this is an integer type that is |
2354 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
2355 | /// or an enum decl which has an unsigned representation. |
2356 | bool isUnsignedIntegerType() const; |
2357 | |
2358 | /// Determines whether this is an integer type that is signed or an |
2359 | /// enumeration types whose underlying type is a signed integer type. |
2360 | bool isSignedIntegerOrEnumerationType() const; |
2361 | |
2362 | /// Determines whether this is an integer type that is unsigned or an |
2363 | /// enumeration types whose underlying type is a unsigned integer type. |
2364 | bool isUnsignedIntegerOrEnumerationType() const; |
2365 | |
2366 | /// Return true if this is a fixed point type according to |
2367 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
2368 | bool isFixedPointType() const; |
2369 | |
2370 | /// Return true if this is a fixed point or integer type. |
2371 | bool isFixedPointOrIntegerType() const; |
2372 | |
2373 | /// Return true if this is a saturated fixed point type according to |
2374 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2375 | bool isSaturatedFixedPointType() const; |
2376 | |
2377 | /// Return true if this is a saturated fixed point type according to |
2378 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2379 | bool isUnsaturatedFixedPointType() const; |
2380 | |
2381 | /// Return true if this is a fixed point type that is signed according |
2382 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2383 | bool isSignedFixedPointType() const; |
2384 | |
2385 | /// Return true if this is a fixed point type that is unsigned according |
2386 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2387 | bool isUnsignedFixedPointType() const; |
2388 | |
2389 | /// Return true if this is not a variable sized type, |
2390 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
2391 | /// incomplete types. |
2392 | bool isConstantSizeType() const; |
2393 | |
2394 | /// Returns true if this type can be represented by some |
2395 | /// set of type specifiers. |
2396 | bool isSpecifierType() const; |
2397 | |
2398 | /// Determine the linkage of this type. |
2399 | Linkage getLinkage() const; |
2400 | |
2401 | /// Determine the visibility of this type. |
2402 | Visibility getVisibility() const { |
2403 | return getLinkageAndVisibility().getVisibility(); |
2404 | } |
2405 | |
2406 | /// Return true if the visibility was explicitly set is the code. |
2407 | bool isVisibilityExplicit() const { |
2408 | return getLinkageAndVisibility().isVisibilityExplicit(); |
2409 | } |
2410 | |
2411 | /// Determine the linkage and visibility of this type. |
2412 | LinkageInfo getLinkageAndVisibility() const; |
2413 | |
2414 | /// True if the computed linkage is valid. Used for consistency |
2415 | /// checking. Should always return true. |
2416 | bool isLinkageValid() const; |
2417 | |
2418 | /// Determine the nullability of the given type. |
2419 | /// |
2420 | /// Note that nullability is only captured as sugar within the type |
2421 | /// system, not as part of the canonical type, so nullability will |
2422 | /// be lost by canonicalization and desugaring. |
2423 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
2424 | |
2425 | /// Determine whether the given type can have a nullability |
2426 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
2427 | /// |
2428 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
2429 | /// this type can have nullability because it is dependent. |
2430 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
2431 | |
2432 | /// Retrieve the set of substitutions required when accessing a member |
2433 | /// of the Objective-C receiver type that is declared in the given context. |
2434 | /// |
2435 | /// \c *this is the type of the object we're operating on, e.g., the |
2436 | /// receiver for a message send or the base of a property access, and is |
2437 | /// expected to be of some object or object pointer type. |
2438 | /// |
2439 | /// \param dc The declaration context for which we are building up a |
2440 | /// substitution mapping, which should be an Objective-C class, extension, |
2441 | /// category, or method within. |
2442 | /// |
2443 | /// \returns an array of type arguments that can be substituted for |
2444 | /// the type parameters of the given declaration context in any type described |
2445 | /// within that context, or an empty optional to indicate that no |
2446 | /// substitution is required. |
2447 | Optional<ArrayRef<QualType>> |
2448 | getObjCSubstitutions(const DeclContext *dc) const; |
2449 | |
2450 | /// Determines if this is an ObjC interface type that may accept type |
2451 | /// parameters. |
2452 | bool acceptsObjCTypeParams() const; |
2453 | |
2454 | const char *getTypeClassName() const; |
2455 | |
2456 | QualType getCanonicalTypeInternal() const { |
2457 | return CanonicalType; |
2458 | } |
2459 | |
2460 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
2461 | void dump() const; |
2462 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
2463 | }; |
2464 | |
2465 | /// This will check for a TypedefType by removing any existing sugar |
2466 | /// until it reaches a TypedefType or a non-sugared type. |
2467 | template <> const TypedefType *Type::getAs() const; |
2468 | |
2469 | /// This will check for a TemplateSpecializationType by removing any |
2470 | /// existing sugar until it reaches a TemplateSpecializationType or a |
2471 | /// non-sugared type. |
2472 | template <> const TemplateSpecializationType *Type::getAs() const; |
2473 | |
2474 | /// This will check for an AttributedType by removing any existing sugar |
2475 | /// until it reaches an AttributedType or a non-sugared type. |
2476 | template <> const AttributedType *Type::getAs() const; |
2477 | |
2478 | // We can do canonical leaf types faster, because we don't have to |
2479 | // worry about preserving child type decoration. |
2480 | #define TYPE(Class, Base) |
2481 | #define LEAF_TYPE(Class) \ |
2482 | template <> inline const Class##Type *Type::getAs() const { \ |
2483 | return dyn_cast<Class##Type>(CanonicalType); \ |
2484 | } \ |
2485 | template <> inline const Class##Type *Type::castAs() const { \ |
2486 | return cast<Class##Type>(CanonicalType); \ |
2487 | } |
2488 | #include "clang/AST/TypeNodes.inc" |
2489 | |
2490 | /// This class is used for builtin types like 'int'. Builtin |
2491 | /// types are always canonical and have a literal name field. |
2492 | class BuiltinType : public Type { |
2493 | public: |
2494 | enum Kind { |
2495 | // OpenCL image types |
2496 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
2497 | #include "clang/Basic/OpenCLImageTypes.def" |
2498 | // OpenCL extension types |
2499 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
2500 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2501 | // SVE Types |
2502 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
2503 | #include "clang/Basic/AArch64SVEACLETypes.def" |
2504 | // PPC MMA Types |
2505 | #define PPC_VECTOR_TYPE(Name, Id, Size) Id, |
2506 | #include "clang/Basic/PPCTypes.def" |
2507 | // RVV Types |
2508 | #define RVV_TYPE(Name, Id, SingletonId) Id, |
2509 | #include "clang/Basic/RISCVVTypes.def" |
2510 | // All other builtin types |
2511 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
2512 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
2513 | #include "clang/AST/BuiltinTypes.def" |
2514 | }; |
2515 | |
2516 | private: |
2517 | friend class ASTContext; // ASTContext creates these. |
2518 | |
2519 | BuiltinType(Kind K) |
2520 | : Type(Builtin, QualType(), |
2521 | K == Dependent ? TypeDependence::DependentInstantiation |
2522 | : TypeDependence::None) { |
2523 | BuiltinTypeBits.Kind = K; |
2524 | } |
2525 | |
2526 | public: |
2527 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
2528 | StringRef getName(const PrintingPolicy &Policy) const; |
2529 | |
2530 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
2531 | // The StringRef is null-terminated. |
2532 | StringRef str = getName(Policy); |
2533 | assert(!str.empty() && str.data()[str.size()] == '\0')(static_cast <bool> (!str.empty() && str.data() [str.size()] == '\0') ? void (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 2533, __extension__ __PRETTY_FUNCTION__)); |
2534 | return str.data(); |
2535 | } |
2536 | |
2537 | bool isSugared() const { return false; } |
2538 | QualType desugar() const { return QualType(this, 0); } |
2539 | |
2540 | bool isInteger() const { |
2541 | return getKind() >= Bool && getKind() <= Int128; |
2542 | } |
2543 | |
2544 | bool isSignedInteger() const { |
2545 | return getKind() >= Char_S && getKind() <= Int128; |
2546 | } |
2547 | |
2548 | bool isUnsignedInteger() const { |
2549 | return getKind() >= Bool && getKind() <= UInt128; |
2550 | } |
2551 | |
2552 | bool isFloatingPoint() const { |
2553 | return getKind() >= Half && getKind() <= Float128; |
2554 | } |
2555 | |
2556 | /// Determines whether the given kind corresponds to a placeholder type. |
2557 | static bool isPlaceholderTypeKind(Kind K) { |
2558 | return K >= Overload; |
2559 | } |
2560 | |
2561 | /// Determines whether this type is a placeholder type, i.e. a type |
2562 | /// which cannot appear in arbitrary positions in a fully-formed |
2563 | /// expression. |
2564 | bool isPlaceholderType() const { |
2565 | return isPlaceholderTypeKind(getKind()); |
2566 | } |
2567 | |
2568 | /// Determines whether this type is a placeholder type other than |
2569 | /// Overload. Most placeholder types require only syntactic |
2570 | /// information about their context in order to be resolved (e.g. |
2571 | /// whether it is a call expression), which means they can (and |
2572 | /// should) be resolved in an earlier "phase" of analysis. |
2573 | /// Overload expressions sometimes pick up further information |
2574 | /// from their context, like whether the context expects a |
2575 | /// specific function-pointer type, and so frequently need |
2576 | /// special treatment. |
2577 | bool isNonOverloadPlaceholderType() const { |
2578 | return getKind() > Overload; |
2579 | } |
2580 | |
2581 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
2582 | }; |
2583 | |
2584 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
2585 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
2586 | class ComplexType : public Type, public llvm::FoldingSetNode { |
2587 | friend class ASTContext; // ASTContext creates these. |
2588 | |
2589 | QualType ElementType; |
2590 | |
2591 | ComplexType(QualType Element, QualType CanonicalPtr) |
2592 | : Type(Complex, CanonicalPtr, Element->getDependence()), |
2593 | ElementType(Element) {} |
2594 | |
2595 | public: |
2596 | QualType getElementType() const { return ElementType; } |
2597 | |
2598 | bool isSugared() const { return false; } |
2599 | QualType desugar() const { return QualType(this, 0); } |
2600 | |
2601 | void Profile(llvm::FoldingSetNodeID &ID) { |
2602 | Profile(ID, getElementType()); |
2603 | } |
2604 | |
2605 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
2606 | ID.AddPointer(Element.getAsOpaquePtr()); |
2607 | } |
2608 | |
2609 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
2610 | }; |
2611 | |
2612 | /// Sugar for parentheses used when specifying types. |
2613 | class ParenType : public Type, public llvm::FoldingSetNode { |
2614 | friend class ASTContext; // ASTContext creates these. |
2615 | |
2616 | QualType Inner; |
2617 | |
2618 | ParenType(QualType InnerType, QualType CanonType) |
2619 | : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {} |
2620 | |
2621 | public: |
2622 | QualType getInnerType() const { return Inner; } |
2623 | |
2624 | bool isSugared() const { return true; } |
2625 | QualType desugar() const { return getInnerType(); } |
2626 | |
2627 | void Profile(llvm::FoldingSetNodeID &ID) { |
2628 | Profile(ID, getInnerType()); |
2629 | } |
2630 | |
2631 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
2632 | Inner.Profile(ID); |
2633 | } |
2634 | |
2635 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
2636 | }; |
2637 | |
2638 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
2639 | class PointerType : public Type, public llvm::FoldingSetNode { |
2640 | friend class ASTContext; // ASTContext creates these. |
2641 | |
2642 | QualType PointeeType; |
2643 | |
2644 | PointerType(QualType Pointee, QualType CanonicalPtr) |
2645 | : Type(Pointer, CanonicalPtr, Pointee->getDependence()), |
2646 | PointeeType(Pointee) {} |
2647 | |
2648 | public: |
2649 | QualType getPointeeType() const { return PointeeType; } |
2650 | |
2651 | bool isSugared() const { return false; } |
2652 | QualType desugar() const { return QualType(this, 0); } |
2653 | |
2654 | void Profile(llvm::FoldingSetNodeID &ID) { |
2655 | Profile(ID, getPointeeType()); |
2656 | } |
2657 | |
2658 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2659 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2660 | } |
2661 | |
2662 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
2663 | }; |
2664 | |
2665 | /// Represents a type which was implicitly adjusted by the semantic |
2666 | /// engine for arbitrary reasons. For example, array and function types can |
2667 | /// decay, and function types can have their calling conventions adjusted. |
2668 | class AdjustedType : public Type, public llvm::FoldingSetNode { |
2669 | QualType OriginalTy; |
2670 | QualType AdjustedTy; |
2671 | |
2672 | protected: |
2673 | friend class ASTContext; // ASTContext creates these. |
2674 | |
2675 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, |
2676 | QualType CanonicalPtr) |
2677 | : Type(TC, CanonicalPtr, OriginalTy->getDependence()), |
2678 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} |
2679 | |
2680 | public: |
2681 | QualType getOriginalType() const { return OriginalTy; } |
2682 | QualType getAdjustedType() const { return AdjustedTy; } |
2683 | |
2684 | bool isSugared() const { return true; } |
2685 | QualType desugar() const { return AdjustedTy; } |
2686 | |
2687 | void Profile(llvm::FoldingSetNodeID &ID) { |
2688 | Profile(ID, OriginalTy, AdjustedTy); |
2689 | } |
2690 | |
2691 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { |
2692 | ID.AddPointer(Orig.getAsOpaquePtr()); |
2693 | ID.AddPointer(New.getAsOpaquePtr()); |
2694 | } |
2695 | |
2696 | static bool classof(const Type *T) { |
2697 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; |
2698 | } |
2699 | }; |
2700 | |
2701 | /// Represents a pointer type decayed from an array or function type. |
2702 | class DecayedType : public AdjustedType { |
2703 | friend class ASTContext; // ASTContext creates these. |
2704 | |
2705 | inline |
2706 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); |
2707 | |
2708 | public: |
2709 | QualType getDecayedType() const { return getAdjustedType(); } |
2710 | |
2711 | inline QualType getPointeeType() const; |
2712 | |
2713 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } |
2714 | }; |
2715 | |
2716 | /// Pointer to a block type. |
2717 | /// This type is to represent types syntactically represented as |
2718 | /// "void (^)(int)", etc. Pointee is required to always be a function type. |
2719 | class BlockPointerType : public Type, public llvm::FoldingSetNode { |
2720 | friend class ASTContext; // ASTContext creates these. |
2721 | |
2722 | // Block is some kind of pointer type |
2723 | QualType PointeeType; |
2724 | |
2725 | BlockPointerType(QualType Pointee, QualType CanonicalCls) |
2726 | : Type(BlockPointer, CanonicalCls, Pointee->getDependence()), |
2727 | PointeeType(Pointee) {} |
2728 | |
2729 | public: |
2730 | // Get the pointee type. Pointee is required to always be a function type. |
2731 | QualType getPointeeType() const { return PointeeType; } |
2732 | |
2733 | bool isSugared() const { return false; } |
2734 | QualType desugar() const { return QualType(this, 0); } |
2735 | |
2736 | void Profile(llvm::FoldingSetNodeID &ID) { |
2737 | Profile(ID, getPointeeType()); |
2738 | } |
2739 | |
2740 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2741 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2742 | } |
2743 | |
2744 | static bool classof(const Type *T) { |
2745 | return T->getTypeClass() == BlockPointer; |
2746 | } |
2747 | }; |
2748 | |
2749 | /// Base for LValueReferenceType and RValueReferenceType |
2750 | class ReferenceType : public Type, public llvm::FoldingSetNode { |
2751 | QualType PointeeType; |
2752 | |
2753 | protected: |
2754 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, |
2755 | bool SpelledAsLValue) |
2756 | : Type(tc, CanonicalRef, Referencee->getDependence()), |
2757 | PointeeType(Referencee) { |
2758 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; |
2759 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); |
2760 | } |
2761 | |
2762 | public: |
2763 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } |
2764 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } |
2765 | |
2766 | QualType getPointeeTypeAsWritten() const { return PointeeType; } |
2767 | |
2768 | QualType getPointeeType() const { |
2769 | // FIXME: this might strip inner qualifiers; okay? |
2770 | const ReferenceType *T = this; |
2771 | while (T->isInnerRef()) |
2772 | T = T->PointeeType->castAs<ReferenceType>(); |
2773 | return T->PointeeType; |
2774 | } |
2775 | |
2776 | void Profile(llvm::FoldingSetNodeID &ID) { |
2777 | Profile(ID, PointeeType, isSpelledAsLValue()); |
2778 | } |
2779 | |
2780 | static void Profile(llvm::FoldingSetNodeID &ID, |
2781 | QualType Referencee, |
2782 | bool SpelledAsLValue) { |
2783 | ID.AddPointer(Referencee.getAsOpaquePtr()); |
2784 | ID.AddBoolean(SpelledAsLValue); |
2785 | } |
2786 | |
2787 | static bool classof(const Type *T) { |
2788 | return T->getTypeClass() == LValueReference || |
2789 | T->getTypeClass() == RValueReference; |
2790 | } |
2791 | }; |
2792 | |
2793 | /// An lvalue reference type, per C++11 [dcl.ref]. |
2794 | class LValueReferenceType : public ReferenceType { |
2795 | friend class ASTContext; // ASTContext creates these |
2796 | |
2797 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, |
2798 | bool SpelledAsLValue) |
2799 | : ReferenceType(LValueReference, Referencee, CanonicalRef, |
2800 | SpelledAsLValue) {} |
2801 | |
2802 | public: |
2803 | bool isSugared() const { return false; } |
2804 | QualType desugar() const { return QualType(this, 0); } |
2805 | |
2806 | static bool classof(const Type *T) { |
2807 | return T->getTypeClass() == LValueReference; |
2808 | } |
2809 | }; |
2810 | |
2811 | /// An rvalue reference type, per C++11 [dcl.ref]. |
2812 | class RValueReferenceType : public ReferenceType { |
2813 | friend class ASTContext; // ASTContext creates these |
2814 | |
2815 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) |
2816 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} |
2817 | |
2818 | public: |
2819 | bool isSugared() const { return false; } |
2820 | QualType desugar() const { return QualType(this, 0); } |
2821 | |
2822 | static bool classof(const Type *T) { |
2823 | return T->getTypeClass() == RValueReference; |
2824 | } |
2825 | }; |
2826 | |
2827 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. |
2828 | /// |
2829 | /// This includes both pointers to data members and pointer to member functions. |
2830 | class MemberPointerType : public Type, public llvm::FoldingSetNode { |
2831 | friend class ASTContext; // ASTContext creates these. |
2832 | |
2833 | QualType PointeeType; |
2834 | |
2835 | /// The class of which the pointee is a member. Must ultimately be a |
2836 | /// RecordType, but could be a typedef or a template parameter too. |
2837 | const Type *Class; |
2838 | |
2839 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) |
2840 | : Type(MemberPointer, CanonicalPtr, |
2841 | (Cls->getDependence() & ~TypeDependence::VariablyModified) | |
2842 | Pointee->getDependence()), |
2843 | PointeeType(Pointee), Class(Cls) {} |
2844 | |
2845 | public: |
2846 | QualType getPointeeType() const { return PointeeType; } |
2847 | |
2848 | /// Returns true if the member type (i.e. the pointee type) is a |
2849 | /// function type rather than a data-member type. |
2850 | bool isMemberFunctionPointer() const { |
2851 | return PointeeType->isFunctionProtoType(); |
2852 | } |
2853 | |
2854 | /// Returns true if the member type (i.e. the pointee type) is a |
2855 | /// data type rather than a function type. |
2856 | bool isMemberDataPointer() const { |
2857 | return !PointeeType->isFunctionProtoType(); |
2858 | } |
2859 | |
2860 | const Type *getClass() const { return Class; } |
2861 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; |
2862 | |
2863 | bool isSugared() const { return false; } |
2864 | QualType desugar() const { return QualType(this, 0); } |
2865 | |
2866 | void Profile(llvm::FoldingSetNodeID &ID) { |
2867 | Profile(ID, getPointeeType(), getClass()); |
2868 | } |
2869 | |
2870 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, |
2871 | const Type *Class) { |
2872 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2873 | ID.AddPointer(Class); |
2874 | } |
2875 | |
2876 | static bool classof(const Type *T) { |
2877 | return T->getTypeClass() == MemberPointer; |
2878 | } |
2879 | }; |
2880 | |
2881 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. |
2882 | class ArrayType : public Type, public llvm::FoldingSetNode { |
2883 | public: |
2884 | /// Capture whether this is a normal array (e.g. int X[4]) |
2885 | /// an array with a static size (e.g. int X[static 4]), or an array |
2886 | /// with a star size (e.g. int X[*]). |
2887 | /// 'static' is only allowed on function parameters. |
2888 | enum ArraySizeModifier { |
2889 | Normal, Static, Star |
2890 | }; |
2891 | |
2892 | private: |
2893 | /// The element type of the array. |
2894 | QualType ElementType; |
2895 | |
2896 | protected: |
2897 | friend class ASTContext; // ASTContext creates these. |
2898 | |
2899 | ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, |
2900 | unsigned tq, const Expr *sz = nullptr); |
2901 | |
2902 | public: |
2903 | QualType getElementType() const { return ElementType; } |
2904 | |
2905 | ArraySizeModifier getSizeModifier() const { |
2906 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); |
2907 | } |
2908 | |
2909 | Qualifiers getIndexTypeQualifiers() const { |
2910 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); |
2911 | } |
2912 | |
2913 | unsigned getIndexTypeCVRQualifiers() const { |
2914 | return ArrayTypeBits.IndexTypeQuals; |
2915 | } |
2916 | |
2917 | static bool classof(const Type *T) { |
2918 | return T->getTypeClass() == ConstantArray || |
2919 | T->getTypeClass() == VariableArray || |
2920 | T->getTypeClass() == IncompleteArray || |
2921 | T->getTypeClass() == DependentSizedArray; |
2922 | } |
2923 | }; |
2924 | |
2925 | /// Represents the canonical version of C arrays with a specified constant size. |
2926 | /// For example, the canonical type for 'int A[4 + 4*100]' is a |
2927 | /// ConstantArrayType where the element type is 'int' and the size is 404. |
2928 | class ConstantArrayType final |
2929 | : public ArrayType, |
2930 | private llvm::TrailingObjects<ConstantArrayType, const Expr *> { |
2931 | friend class ASTContext; // ASTContext creates these. |
2932 | friend TrailingObjects; |
2933 | |
2934 | llvm::APInt Size; // Allows us to unique the type. |
2935 | |
2936 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, |
2937 | const Expr *sz, ArraySizeModifier sm, unsigned tq) |
2938 | : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) { |
2939 | ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr; |
2940 | if (ConstantArrayTypeBits.HasStoredSizeExpr) { |
2941 | assert(!can.isNull() && "canonical constant array should not have size")(static_cast <bool> (!can.isNull() && "canonical constant array should not have size" ) ? void (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 2941, __extension__ __PRETTY_FUNCTION__)); |
2942 | *getTrailingObjects<const Expr*>() = sz; |
2943 | } |
2944 | } |
2945 | |
2946 | unsigned numTrailingObjects(OverloadToken<const Expr*>) const { |
2947 | return ConstantArrayTypeBits.HasStoredSizeExpr; |
2948 | } |
2949 | |
2950 | public: |
2951 | const llvm::APInt &getSize() const { return Size; } |
2952 | const Expr *getSizeExpr() const { |
2953 | return ConstantArrayTypeBits.HasStoredSizeExpr |
2954 | ? *getTrailingObjects<const Expr *>() |
2955 | : nullptr; |
2956 | } |
2957 | bool isSugared() const { return false; } |
2958 | QualType desugar() const { return QualType(this, 0); } |
2959 | |
2960 | /// Determine the number of bits required to address a member of |
2961 | // an array with the given element type and number of elements. |
2962 | static unsigned getNumAddressingBits(const ASTContext &Context, |
2963 | QualType ElementType, |
2964 | const llvm::APInt &NumElements); |
2965 | |
2966 | /// Determine the maximum number of active bits that an array's size |
2967 | /// can require, which limits the maximum size of the array. |
2968 | static unsigned getMaxSizeBits(const ASTContext &Context); |
2969 | |
2970 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
2971 | Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(), |
2972 | getSizeModifier(), getIndexTypeCVRQualifiers()); |
2973 | } |
2974 | |
2975 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx, |
2976 | QualType ET, const llvm::APInt &ArraySize, |
2977 | const Expr *SizeExpr, ArraySizeModifier SizeMod, |
2978 | unsigned TypeQuals); |
2979 | |
2980 | static bool classof(const Type *T) { |
2981 | return T->getTypeClass() == ConstantArray; |
2982 | } |
2983 | }; |
2984 | |
2985 | /// Represents a C array with an unspecified size. For example 'int A[]' has |
2986 | /// an IncompleteArrayType where the element type is 'int' and the size is |
2987 | /// unspecified. |
2988 | class IncompleteArrayType : public ArrayType { |
2989 | friend class ASTContext; // ASTContext creates these. |
2990 | |
2991 | IncompleteArrayType(QualType et, QualType can, |
2992 | ArraySizeModifier sm, unsigned tq) |
2993 | : ArrayType(IncompleteArray, et, can, sm, tq) {} |
2994 | |
2995 | public: |
2996 | friend class StmtIteratorBase; |
2997 | |
2998 | bool isSugared() const { return false; } |
2999 | QualType desugar() const { return QualType(this, 0); } |
3000 | |
3001 | static bool classof(const Type *T) { |
3002 | return T->getTypeClass() == IncompleteArray; |
3003 | } |
3004 | |
3005 | void Profile(llvm::FoldingSetNodeID &ID) { |
3006 | Profile(ID, getElementType(), getSizeModifier(), |
3007 | getIndexTypeCVRQualifiers()); |
3008 | } |
3009 | |
3010 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
3011 | ArraySizeModifier SizeMod, unsigned TypeQuals) { |
3012 | ID.AddPointer(ET.getAsOpaquePtr()); |
3013 | ID.AddInteger(SizeMod); |
3014 | ID.AddInteger(TypeQuals); |
3015 | } |
3016 | }; |
3017 | |
3018 | /// Represents a C array with a specified size that is not an |
3019 | /// integer-constant-expression. For example, 'int s[x+foo()]'. |
3020 | /// Since the size expression is an arbitrary expression, we store it as such. |
3021 | /// |
3022 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and |
3023 | /// should not be: two lexically equivalent variable array types could mean |
3024 | /// different things, for example, these variables do not have the same type |
3025 | /// dynamically: |
3026 | /// |
3027 | /// void foo(int x) { |
3028 | /// int Y[x]; |
3029 | /// ++x; |
3030 | /// int Z[x]; |
3031 | /// } |
3032 | class VariableArrayType : public ArrayType { |
3033 | friend class ASTContext; // ASTContext creates these. |
3034 | |
3035 | /// An assignment-expression. VLA's are only permitted within |
3036 | /// a function block. |
3037 | Stmt *SizeExpr; |
3038 | |
3039 | /// The range spanned by the left and right array brackets. |
3040 | SourceRange Brackets; |
3041 | |
3042 | VariableArrayType(QualType et, QualType can, Expr *e, |
3043 | ArraySizeModifier sm, unsigned tq, |
3044 | SourceRange brackets) |
3045 | : ArrayType(VariableArray, et, can, sm, tq, e), |
3046 | SizeExpr((Stmt*) e), Brackets(brackets) {} |
3047 | |
3048 | public: |
3049 | friend class StmtIteratorBase; |
3050 | |
3051 | Expr *getSizeExpr() const { |
3052 | // We use C-style casts instead of cast<> here because we do not wish |
3053 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3054 | return (Expr*) SizeExpr; |
3055 | } |
3056 | |
3057 | SourceRange getBracketsRange() const { return Brackets; } |
3058 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3059 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3060 | |
3061 | bool isSugared() const { return false; } |
3062 | QualType desugar() const { return QualType(this, 0); } |
3063 | |
3064 | static bool classof(const Type *T) { |
3065 | return T->getTypeClass() == VariableArray; |
3066 | } |
3067 | |
3068 | void Profile(llvm::FoldingSetNodeID &ID) { |
3069 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3069); |
3070 | } |
3071 | }; |
3072 | |
3073 | /// Represents an array type in C++ whose size is a value-dependent expression. |
3074 | /// |
3075 | /// For example: |
3076 | /// \code |
3077 | /// template<typename T, int Size> |
3078 | /// class array { |
3079 | /// T data[Size]; |
3080 | /// }; |
3081 | /// \endcode |
3082 | /// |
3083 | /// For these types, we won't actually know what the array bound is |
3084 | /// until template instantiation occurs, at which point this will |
3085 | /// become either a ConstantArrayType or a VariableArrayType. |
3086 | class DependentSizedArrayType : public ArrayType { |
3087 | friend class ASTContext; // ASTContext creates these. |
3088 | |
3089 | const ASTContext &Context; |
3090 | |
3091 | /// An assignment expression that will instantiate to the |
3092 | /// size of the array. |
3093 | /// |
3094 | /// The expression itself might be null, in which case the array |
3095 | /// type will have its size deduced from an initializer. |
3096 | Stmt *SizeExpr; |
3097 | |
3098 | /// The range spanned by the left and right array brackets. |
3099 | SourceRange Brackets; |
3100 | |
3101 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, |
3102 | Expr *e, ArraySizeModifier sm, unsigned tq, |
3103 | SourceRange brackets); |
3104 | |
3105 | public: |
3106 | friend class StmtIteratorBase; |
3107 | |
3108 | Expr *getSizeExpr() const { |
3109 | // We use C-style casts instead of cast<> here because we do not wish |
3110 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3111 | return (Expr*) SizeExpr; |
3112 | } |
3113 | |
3114 | SourceRange getBracketsRange() const { return Brackets; } |
3115 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3116 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3117 | |
3118 | bool isSugared() const { return false; } |
3119 | QualType desugar() const { return QualType(this, 0); } |
3120 | |
3121 | static bool classof(const Type *T) { |
3122 | return T->getTypeClass() == DependentSizedArray; |
3123 | } |
3124 | |
3125 | void Profile(llvm::FoldingSetNodeID &ID) { |
3126 | Profile(ID, Context, getElementType(), |
3127 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); |
3128 | } |
3129 | |
3130 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3131 | QualType ET, ArraySizeModifier SizeMod, |
3132 | unsigned TypeQuals, Expr *E); |
3133 | }; |
3134 | |
3135 | /// Represents an extended address space qualifier where the input address space |
3136 | /// value is dependent. Non-dependent address spaces are not represented with a |
3137 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. |
3138 | /// |
3139 | /// For example: |
3140 | /// \code |
3141 | /// template<typename T, int AddrSpace> |
3142 | /// class AddressSpace { |
3143 | /// typedef T __attribute__((address_space(AddrSpace))) type; |
3144 | /// } |
3145 | /// \endcode |
3146 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { |
3147 | friend class ASTContext; |
3148 | |
3149 | const ASTContext &Context; |
3150 | Expr *AddrSpaceExpr; |
3151 | QualType PointeeType; |
3152 | SourceLocation loc; |
3153 | |
3154 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, |
3155 | QualType can, Expr *AddrSpaceExpr, |
3156 | SourceLocation loc); |
3157 | |
3158 | public: |
3159 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } |
3160 | QualType getPointeeType() const { return PointeeType; } |
3161 | SourceLocation getAttributeLoc() const { return loc; } |
3162 | |
3163 | bool isSugared() const { return false; } |
3164 | QualType desugar() const { return QualType(this, 0); } |
3165 | |
3166 | static bool classof(const Type *T) { |
3167 | return T->getTypeClass() == DependentAddressSpace; |
3168 | } |
3169 | |
3170 | void Profile(llvm::FoldingSetNodeID &ID) { |
3171 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); |
3172 | } |
3173 | |
3174 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3175 | QualType PointeeType, Expr *AddrSpaceExpr); |
3176 | }; |
3177 | |
3178 | /// Represents an extended vector type where either the type or size is |
3179 | /// dependent. |
3180 | /// |
3181 | /// For example: |
3182 | /// \code |
3183 | /// template<typename T, int Size> |
3184 | /// class vector { |
3185 | /// typedef T __attribute__((ext_vector_type(Size))) type; |
3186 | /// } |
3187 | /// \endcode |
3188 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { |
3189 | friend class ASTContext; |
3190 | |
3191 | const ASTContext &Context; |
3192 | Expr *SizeExpr; |
3193 | |
3194 | /// The element type of the array. |
3195 | QualType ElementType; |
3196 | |
3197 | SourceLocation loc; |
3198 | |
3199 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, |
3200 | QualType can, Expr *SizeExpr, SourceLocation loc); |
3201 | |
3202 | public: |
3203 | Expr *getSizeExpr() const { return SizeExpr; } |
3204 | QualType getElementType() const { return ElementType; } |
3205 | SourceLocation getAttributeLoc() const { return loc; } |
3206 | |
3207 | bool isSugared() const { return false; } |
3208 | QualType desugar() const { return QualType(this, 0); } |
3209 | |
3210 | static bool classof(const Type *T) { |
3211 | return T->getTypeClass() == DependentSizedExtVector; |
3212 | } |
3213 | |
3214 | void Profile(llvm::FoldingSetNodeID &ID) { |
3215 | Profile(ID, Context, getElementType(), getSizeExpr()); |
3216 | } |
3217 | |
3218 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3219 | QualType ElementType, Expr *SizeExpr); |
3220 | }; |
3221 | |
3222 | |
3223 | /// Represents a GCC generic vector type. This type is created using |
3224 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in |
3225 | /// bytes; or from an Altivec __vector or vector declaration. |
3226 | /// Since the constructor takes the number of vector elements, the |
3227 | /// client is responsible for converting the size into the number of elements. |
3228 | class VectorType : public Type, public llvm::FoldingSetNode { |
3229 | public: |
3230 | enum VectorKind { |
3231 | /// not a target-specific vector type |
3232 | GenericVector, |
3233 | |
3234 | /// is AltiVec vector |
3235 | AltiVecVector, |
3236 | |
3237 | /// is AltiVec 'vector Pixel' |
3238 | AltiVecPixel, |
3239 | |
3240 | /// is AltiVec 'vector bool ...' |
3241 | AltiVecBool, |
3242 | |
3243 | /// is ARM Neon vector |
3244 | NeonVector, |
3245 | |
3246 | /// is ARM Neon polynomial vector |
3247 | NeonPolyVector, |
3248 | |
3249 | /// is AArch64 SVE fixed-length data vector |
3250 | SveFixedLengthDataVector, |
3251 | |
3252 | /// is AArch64 SVE fixed-length predicate vector |
3253 | SveFixedLengthPredicateVector |
3254 | }; |
3255 | |
3256 | protected: |
3257 | friend class ASTContext; // ASTContext creates these. |
3258 | |
3259 | /// The element type of the vector. |
3260 | QualType ElementType; |
3261 | |
3262 | VectorType(QualType vecType, unsigned nElements, QualType canonType, |
3263 | VectorKind vecKind); |
3264 | |
3265 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, |
3266 | QualType canonType, VectorKind vecKind); |
3267 | |
3268 | public: |
3269 | QualType getElementType() const { return ElementType; } |
3270 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } |
3271 | |
3272 | bool isSugared() const { return false; } |
3273 | QualType desugar() const { return QualType(this, 0); } |
3274 | |
3275 | VectorKind getVectorKind() const { |
3276 | return VectorKind(VectorTypeBits.VecKind); |
3277 | } |
3278 | |
3279 | void Profile(llvm::FoldingSetNodeID &ID) { |
3280 | Profile(ID, getElementType(), getNumElements(), |
3281 | getTypeClass(), getVectorKind()); |
3282 | } |
3283 | |
3284 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3285 | unsigned NumElements, TypeClass TypeClass, |
3286 | VectorKind VecKind) { |
3287 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3288 | ID.AddInteger(NumElements); |
3289 | ID.AddInteger(TypeClass); |
3290 | ID.AddInteger(VecKind); |
3291 | } |
3292 | |
3293 | static bool classof(const Type *T) { |
3294 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; |
3295 | } |
3296 | }; |
3297 | |
3298 | /// Represents a vector type where either the type or size is dependent. |
3299 | //// |
3300 | /// For example: |
3301 | /// \code |
3302 | /// template<typename T, int Size> |
3303 | /// class vector { |
3304 | /// typedef T __attribute__((vector_size(Size))) type; |
3305 | /// } |
3306 | /// \endcode |
3307 | class DependentVectorType : public Type, public llvm::FoldingSetNode { |
3308 | friend class ASTContext; |
3309 | |
3310 | const ASTContext &Context; |
3311 | QualType ElementType; |
3312 | Expr *SizeExpr; |
3313 | SourceLocation Loc; |
3314 | |
3315 | DependentVectorType(const ASTContext &Context, QualType ElementType, |
3316 | QualType CanonType, Expr *SizeExpr, |
3317 | SourceLocation Loc, VectorType::VectorKind vecKind); |
3318 | |
3319 | public: |
3320 | Expr *getSizeExpr() const { return SizeExpr; } |
3321 | QualType getElementType() const { return ElementType; } |
3322 | SourceLocation getAttributeLoc() const { return Loc; } |
3323 | VectorType::VectorKind getVectorKind() const { |
3324 | return VectorType::VectorKind(VectorTypeBits.VecKind); |
3325 | } |
3326 | |
3327 | bool isSugared() const { return false; } |
3328 | QualType desugar() const { return QualType(this, 0); } |
3329 | |
3330 | static bool classof(const Type *T) { |
3331 | return T->getTypeClass() == DependentVector; |
3332 | } |
3333 | |
3334 | void Profile(llvm::FoldingSetNodeID &ID) { |
3335 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); |
3336 | } |
3337 | |
3338 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3339 | QualType ElementType, const Expr *SizeExpr, |
3340 | VectorType::VectorKind VecKind); |
3341 | }; |
3342 | |
3343 | /// ExtVectorType - Extended vector type. This type is created using |
3344 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. |
3345 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This |
3346 | /// class enables syntactic extensions, like Vector Components for accessing |
3347 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL |
3348 | /// Shading Language). |
3349 | class ExtVectorType : public VectorType { |
3350 | friend class ASTContext; // ASTContext creates these. |
3351 | |
3352 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) |
3353 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} |
3354 | |
3355 | public: |
3356 | static int getPointAccessorIdx(char c) { |
3357 | switch (c) { |
3358 | default: return -1; |
3359 | case 'x': case 'r': return 0; |
3360 | case 'y': case 'g': return 1; |
3361 | case 'z': case 'b': return 2; |
3362 | case 'w': case 'a': return 3; |
3363 | } |
3364 | } |
3365 | |
3366 | static int getNumericAccessorIdx(char c) { |
3367 | switch (c) { |
3368 | default: return -1; |
3369 | case '0': return 0; |
3370 | case '1': return 1; |
3371 | case '2': return 2; |
3372 | case '3': return 3; |
3373 | case '4': return 4; |
3374 | case '5': return 5; |
3375 | case '6': return 6; |
3376 | case '7': return 7; |
3377 | case '8': return 8; |
3378 | case '9': return 9; |
3379 | case 'A': |
3380 | case 'a': return 10; |
3381 | case 'B': |
3382 | case 'b': return 11; |
3383 | case 'C': |
3384 | case 'c': return 12; |
3385 | case 'D': |
3386 | case 'd': return 13; |
3387 | case 'E': |
3388 | case 'e': return 14; |
3389 | case 'F': |
3390 | case 'f': return 15; |
3391 | } |
3392 | } |
3393 | |
3394 | static int getAccessorIdx(char c, bool isNumericAccessor) { |
3395 | if (isNumericAccessor) |
3396 | return getNumericAccessorIdx(c); |
3397 | else |
3398 | return getPointAccessorIdx(c); |
3399 | } |
3400 | |
3401 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { |
3402 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) |
3403 | return unsigned(idx-1) < getNumElements(); |
3404 | return false; |
3405 | } |
3406 | |
3407 | bool isSugared() const { return false; } |
3408 | QualType desugar() const { return QualType(this, 0); } |
3409 | |
3410 | static bool classof(const Type *T) { |
3411 | return T->getTypeClass() == ExtVector; |
3412 | } |
3413 | }; |
3414 | |
3415 | /// Represents a matrix type, as defined in the Matrix Types clang extensions. |
3416 | /// __attribute__((matrix_type(rows, columns))), where "rows" specifies |
3417 | /// number of rows and "columns" specifies the number of columns. |
3418 | class MatrixType : public Type, public llvm::FoldingSetNode { |
3419 | protected: |
3420 | friend class ASTContext; |
3421 | |
3422 | /// The element type of the matrix. |
3423 | QualType ElementType; |
3424 | |
3425 | MatrixType(QualType ElementTy, QualType CanonElementTy); |
3426 | |
3427 | MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy, |
3428 | const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr); |
3429 | |
3430 | public: |
3431 | /// Returns type of the elements being stored in the matrix |
3432 | QualType getElementType() const { return ElementType; } |
3433 | |
3434 | /// Valid elements types are the following: |
3435 | /// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types |
3436 | /// and _Bool |
3437 | /// * the standard floating types float or double |
3438 | /// * a half-precision floating point type, if one is supported on the target |
3439 | static bool isValidElementType(QualType T) { |
3440 | return T->isDependentType() || |
3441 | (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType()); |
3442 | } |
3443 | |
3444 | bool isSugared() const { return false; } |
3445 | QualType desugar() const { return QualType(this, 0); } |
3446 | |
3447 | static bool classof(const Type *T) { |
3448 | return T->getTypeClass() == ConstantMatrix || |
3449 | T->getTypeClass() == DependentSizedMatrix; |
3450 | } |
3451 | }; |
3452 | |
3453 | /// Represents a concrete matrix type with constant number of rows and columns |
3454 | class ConstantMatrixType final : public MatrixType { |
3455 | protected: |
3456 | friend class ASTContext; |
3457 | |
3458 | /// Number of rows and columns. |
3459 | unsigned NumRows; |
3460 | unsigned NumColumns; |
3461 | |
3462 | static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1; |
3463 | |
3464 | ConstantMatrixType(QualType MatrixElementType, unsigned NRows, |
3465 | unsigned NColumns, QualType CanonElementType); |
3466 | |
3467 | ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows, |
3468 | unsigned NColumns, QualType CanonElementType); |
3469 | |
3470 | public: |
3471 | /// Returns the number of rows in the matrix. |
3472 | unsigned getNumRows() const { return NumRows; } |
3473 | |
3474 | /// Returns the number of columns in the matrix. |
3475 | unsigned getNumColumns() const { return NumColumns; } |
3476 | |
3477 | /// Returns the number of elements required to embed the matrix into a vector. |
3478 | unsigned getNumElementsFlattened() const { |
3479 | return getNumRows() * getNumColumns(); |
3480 | } |
3481 | |
3482 | /// Returns true if \p NumElements is a valid matrix dimension. |
3483 | static constexpr bool isDimensionValid(size_t NumElements) { |
3484 | return NumElements > 0 && NumElements <= MaxElementsPerDimension; |
3485 | } |
3486 | |
3487 | /// Returns the maximum number of elements per dimension. |
3488 | static constexpr unsigned getMaxElementsPerDimension() { |
3489 | return MaxElementsPerDimension; |
3490 | } |
3491 | |
3492 | void Profile(llvm::FoldingSetNodeID &ID) { |
3493 | Profile(ID, getElementType(), getNumRows(), getNumColumns(), |
3494 | getTypeClass()); |
3495 | } |
3496 | |
3497 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3498 | unsigned NumRows, unsigned NumColumns, |
3499 | TypeClass TypeClass) { |
3500 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3501 | ID.AddInteger(NumRows); |
3502 | ID.AddInteger(NumColumns); |
3503 | ID.AddInteger(TypeClass); |
3504 | } |
3505 | |
3506 | static bool classof(const Type *T) { |
3507 | return T->getTypeClass() == ConstantMatrix; |
3508 | } |
3509 | }; |
3510 | |
3511 | /// Represents a matrix type where the type and the number of rows and columns |
3512 | /// is dependent on a template. |
3513 | class DependentSizedMatrixType final : public MatrixType { |
3514 | friend class ASTContext; |
3515 | |
3516 | const ASTContext &Context; |
3517 | Expr *RowExpr; |
3518 | Expr *ColumnExpr; |
3519 | |
3520 | SourceLocation loc; |
3521 | |
3522 | DependentSizedMatrixType(const ASTContext &Context, QualType ElementType, |
3523 | QualType CanonicalType, Expr *RowExpr, |
3524 | Expr *ColumnExpr, SourceLocation loc); |
3525 | |
3526 | public: |
3527 | QualType getElementType() const { return ElementType; } |
3528 | Expr *getRowExpr() const { return RowExpr; } |
3529 | Expr *getColumnExpr() const { return ColumnExpr; } |
3530 | SourceLocation getAttributeLoc() const { return loc; } |
3531 | |
3532 | bool isSugared() const { return false; } |
3533 | QualType desugar() const { return QualType(this, 0); } |
3534 | |
3535 | static bool classof(const Type *T) { |
3536 | return T->getTypeClass() == DependentSizedMatrix; |
3537 | } |
3538 | |
3539 | void Profile(llvm::FoldingSetNodeID &ID) { |
3540 | Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr()); |
3541 | } |
3542 | |
3543 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3544 | QualType ElementType, Expr *RowExpr, Expr *ColumnExpr); |
3545 | }; |
3546 | |
3547 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base |
3548 | /// class of FunctionNoProtoType and FunctionProtoType. |
3549 | class FunctionType : public Type { |
3550 | // The type returned by the function. |
3551 | QualType ResultType; |
3552 | |
3553 | public: |
3554 | /// Interesting information about a specific parameter that can't simply |
3555 | /// be reflected in parameter's type. This is only used by FunctionProtoType |
3556 | /// but is in FunctionType to make this class available during the |
3557 | /// specification of the bases of FunctionProtoType. |
3558 | /// |
3559 | /// It makes sense to model language features this way when there's some |
3560 | /// sort of parameter-specific override (such as an attribute) that |
3561 | /// affects how the function is called. For example, the ARC ns_consumed |
3562 | /// attribute changes whether a parameter is passed at +0 (the default) |
3563 | /// or +1 (ns_consumed). This must be reflected in the function type, |
3564 | /// but isn't really a change to the parameter type. |
3565 | /// |
3566 | /// One serious disadvantage of modelling language features this way is |
3567 | /// that they generally do not work with language features that attempt |
3568 | /// to destructure types. For example, template argument deduction will |
3569 | /// not be able to match a parameter declared as |
3570 | /// T (*)(U) |
3571 | /// against an argument of type |
3572 | /// void (*)(__attribute__((ns_consumed)) id) |
3573 | /// because the substitution of T=void, U=id into the former will |
3574 | /// not produce the latter. |
3575 | class ExtParameterInfo { |
3576 | enum { |
3577 | ABIMask = 0x0F, |
3578 | IsConsumed = 0x10, |
3579 | HasPassObjSize = 0x20, |
3580 | IsNoEscape = 0x40, |
3581 | }; |
3582 | unsigned char Data = 0; |
3583 | |
3584 | public: |
3585 | ExtParameterInfo() = default; |
3586 | |
3587 | /// Return the ABI treatment of this parameter. |
3588 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } |
3589 | ExtParameterInfo withABI(ParameterABI kind) const { |
3590 | ExtParameterInfo copy = *this; |
3591 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); |
3592 | return copy; |
3593 | } |
3594 | |
3595 | /// Is this parameter considered "consumed" by Objective-C ARC? |
3596 | /// Consumed parameters must have retainable object type. |
3597 | bool isConsumed() const { return (Data & IsConsumed); } |
3598 | ExtParameterInfo withIsConsumed(bool consumed) const { |
3599 | ExtParameterInfo copy = *this; |
3600 | if (consumed) |
3601 | copy.Data |= IsConsumed; |
3602 | else |
3603 | copy.Data &= ~IsConsumed; |
3604 | return copy; |
3605 | } |
3606 | |
3607 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } |
3608 | ExtParameterInfo withHasPassObjectSize() const { |
3609 | ExtParameterInfo Copy = *this; |
3610 | Copy.Data |= HasPassObjSize; |
3611 | return Copy; |
3612 | } |
3613 | |
3614 | bool isNoEscape() const { return Data & IsNoEscape; } |
3615 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { |
3616 | ExtParameterInfo Copy = *this; |
3617 | if (NoEscape) |
3618 | Copy.Data |= IsNoEscape; |
3619 | else |
3620 | Copy.Data &= ~IsNoEscape; |
3621 | return Copy; |
3622 | } |
3623 | |
3624 | unsigned char getOpaqueValue() const { return Data; } |
3625 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { |
3626 | ExtParameterInfo result; |
3627 | result.Data = data; |
3628 | return result; |
3629 | } |
3630 | |
3631 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3632 | return lhs.Data == rhs.Data; |
3633 | } |
3634 | |
3635 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3636 | return lhs.Data != rhs.Data; |
3637 | } |
3638 | }; |
3639 | |
3640 | /// A class which abstracts out some details necessary for |
3641 | /// making a call. |
3642 | /// |
3643 | /// It is not actually used directly for storing this information in |
3644 | /// a FunctionType, although FunctionType does currently use the |
3645 | /// same bit-pattern. |
3646 | /// |
3647 | // If you add a field (say Foo), other than the obvious places (both, |
3648 | // constructors, compile failures), what you need to update is |
3649 | // * Operator== |
3650 | // * getFoo |
3651 | // * withFoo |
3652 | // * functionType. Add Foo, getFoo. |
3653 | // * ASTContext::getFooType |
3654 | // * ASTContext::mergeFunctionTypes |
3655 | // * FunctionNoProtoType::Profile |
3656 | // * FunctionProtoType::Profile |
3657 | // * TypePrinter::PrintFunctionProto |
3658 | // * AST read and write |
3659 | // * Codegen |
3660 | class ExtInfo { |
3661 | friend class FunctionType; |
3662 | |
3663 | // Feel free to rearrange or add bits, but if you go over 16, you'll need to |
3664 | // adjust the Bits field below, and if you add bits, you'll need to adjust |
3665 | // Type::FunctionTypeBitfields::ExtInfo as well. |
3666 | |
3667 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall| |
3668 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | 12 | |
3669 | // |
3670 | // regparm is either 0 (no regparm attribute) or the regparm value+1. |
3671 | enum { CallConvMask = 0x1F }; |
3672 | enum { NoReturnMask = 0x20 }; |
3673 | enum { ProducesResultMask = 0x40 }; |
3674 | enum { NoCallerSavedRegsMask = 0x80 }; |
3675 | enum { |
3676 | RegParmMask = 0x700, |
3677 | RegParmOffset = 8 |
3678 | }; |
3679 | enum { NoCfCheckMask = 0x800 }; |
3680 | enum { CmseNSCallMask = 0x1000 }; |
3681 | uint16_t Bits = CC_C; |
3682 | |
3683 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} |
3684 | |
3685 | public: |
3686 | // Constructor with no defaults. Use this when you know that you |
3687 | // have all the elements (when reading an AST file for example). |
3688 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, |
3689 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck, |
3690 | bool cmseNSCall) { |
3691 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(static_cast <bool> ((!hasRegParm || regParm < 7) && "Invalid regparm value") ? void (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3691, __extension__ __PRETTY_FUNCTION__)); |
3692 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | |
3693 | (producesResult ? ProducesResultMask : 0) | |
3694 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | |
3695 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | |
3696 | (NoCfCheck ? NoCfCheckMask : 0) | |
3697 | (cmseNSCall ? CmseNSCallMask : 0); |
3698 | } |
3699 | |
3700 | // Constructor with all defaults. Use when for example creating a |
3701 | // function known to use defaults. |
3702 | ExtInfo() = default; |
3703 | |
3704 | // Constructor with just the calling convention, which is an important part |
3705 | // of the canonical type. |
3706 | ExtInfo(CallingConv CC) : Bits(CC) {} |
3707 | |
3708 | bool getNoReturn() const { return Bits & NoReturnMask; } |
3709 | bool getProducesResult() const { return Bits & ProducesResultMask; } |
3710 | bool getCmseNSCall() const { return Bits & CmseNSCallMask; } |
3711 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } |
3712 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } |
3713 | bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; } |
3714 | |
3715 | unsigned getRegParm() const { |
3716 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; |
3717 | if (RegParm > 0) |
3718 | --RegParm; |
3719 | return RegParm; |
3720 | } |
3721 | |
3722 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } |
3723 | |
3724 | bool operator==(ExtInfo Other) const { |
3725 | return Bits == Other.Bits; |
3726 | } |
3727 | bool operator!=(ExtInfo Other) const { |
3728 | return Bits != Other.Bits; |
3729 | } |
3730 | |
3731 | // Note that we don't have setters. That is by design, use |
3732 | // the following with methods instead of mutating these objects. |
3733 | |
3734 | ExtInfo withNoReturn(bool noReturn) const { |
3735 | if (noReturn) |
3736 | return ExtInfo(Bits | NoReturnMask); |
3737 | else |
3738 | return ExtInfo(Bits & ~NoReturnMask); |
3739 | } |
3740 | |
3741 | ExtInfo withProducesResult(bool producesResult) const { |
3742 | if (producesResult) |
3743 | return ExtInfo(Bits | ProducesResultMask); |
3744 | else |
3745 | return ExtInfo(Bits & ~ProducesResultMask); |
3746 | } |
3747 | |
3748 | ExtInfo withCmseNSCall(bool cmseNSCall) const { |
3749 | if (cmseNSCall) |
3750 | return ExtInfo(Bits | CmseNSCallMask); |
3751 | else |
3752 | return ExtInfo(Bits & ~CmseNSCallMask); |
3753 | } |
3754 | |
3755 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { |
3756 | if (noCallerSavedRegs) |
3757 | return ExtInfo(Bits | NoCallerSavedRegsMask); |
3758 | else |
3759 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); |
3760 | } |
3761 | |
3762 | ExtInfo withNoCfCheck(bool noCfCheck) const { |
3763 | if (noCfCheck) |
3764 | return ExtInfo(Bits | NoCfCheckMask); |
3765 | else |
3766 | return ExtInfo(Bits & ~NoCfCheckMask); |
3767 | } |
3768 | |
3769 | ExtInfo withRegParm(unsigned RegParm) const { |
3770 | assert(RegParm < 7 && "Invalid regparm value")(static_cast <bool> (RegParm < 7 && "Invalid regparm value" ) ? void (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3770, __extension__ __PRETTY_FUNCTION__)); |
3771 | return ExtInfo((Bits & ~RegParmMask) | |
3772 | ((RegParm + 1) << RegParmOffset)); |
3773 | } |
3774 | |
3775 | ExtInfo withCallingConv(CallingConv cc) const { |
3776 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); |
3777 | } |
3778 | |
3779 | void Profile(llvm::FoldingSetNodeID &ID) const { |
3780 | ID.AddInteger(Bits); |
3781 | } |
3782 | }; |
3783 | |
3784 | /// A simple holder for a QualType representing a type in an |
3785 | /// exception specification. Unfortunately needed by FunctionProtoType |
3786 | /// because TrailingObjects cannot handle repeated types. |
3787 | struct ExceptionType { QualType Type; }; |
3788 | |
3789 | /// A simple holder for various uncommon bits which do not fit in |
3790 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the |
3791 | /// alignment of subsequent objects in TrailingObjects. You must update |
3792 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. |
3793 | struct alignas(void *) FunctionTypeExtraBitfields { |
3794 | /// The number of types in the exception specification. |
3795 | /// A whole unsigned is not needed here and according to |
3796 | /// [implimits] 8 bits would be enough here. |
3797 | unsigned NumExceptionType; |
3798 | }; |
3799 | |
3800 | protected: |
3801 | FunctionType(TypeClass tc, QualType res, QualType Canonical, |
3802 | TypeDependence Dependence, ExtInfo Info) |
3803 | : Type(tc, Canonical, Dependence), ResultType(res) { |
3804 | FunctionTypeBits.ExtInfo = Info.Bits; |
3805 | } |
3806 | |
3807 | Qualifiers getFastTypeQuals() const { |
3808 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); |
3809 | } |
3810 | |
3811 | public: |
3812 | QualType getReturnType() const { return ResultType; } |
3813 | |
3814 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } |
3815 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } |
3816 | |
3817 | /// Determine whether this function type includes the GNU noreturn |
3818 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function |
3819 | /// type. |
3820 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } |
3821 | |
3822 | bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); } |
3823 | CallingConv getCallConv() const { return getExtInfo().getCC(); } |
3824 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } |
3825 | |
3826 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, |
3827 | "Const, volatile and restrict are assumed to be a subset of " |
3828 | "the fast qualifiers."); |
3829 | |
3830 | bool isConst() const { return getFastTypeQuals().hasConst(); } |
3831 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } |
3832 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } |
3833 | |
3834 | /// Determine the type of an expression that calls a function of |
3835 | /// this type. |
3836 | QualType getCallResultType(const ASTContext &Context) const { |
3837 | return getReturnType().getNonLValueExprType(Context); |
3838 | } |
3839 | |
3840 | static StringRef getNameForCallConv(CallingConv CC); |
3841 | |
3842 | static bool classof(const Type *T) { |
3843 | return T->getTypeClass() == FunctionNoProto || |
3844 | T->getTypeClass() == FunctionProto; |
3845 | } |
3846 | }; |
3847 | |
3848 | /// Represents a K&R-style 'int foo()' function, which has |
3849 | /// no information available about its arguments. |
3850 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { |
3851 | friend class ASTContext; // ASTContext creates these. |
3852 | |
3853 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) |
3854 | : FunctionType(FunctionNoProto, Result, Canonical, |
3855 | Result->getDependence() & |
3856 | ~(TypeDependence::DependentInstantiation | |
3857 | TypeDependence::UnexpandedPack), |
3858 | Info) {} |
3859 | |
3860 | public: |
3861 | // No additional state past what FunctionType provides. |
3862 | |
3863 | bool isSugared() const { return false; } |
3864 | QualType desugar() const { return QualType(this, 0); } |
3865 | |
3866 | void Profile(llvm::FoldingSetNodeID &ID) { |
3867 | Profile(ID, getReturnType(), getExtInfo()); |
3868 | } |
3869 | |
3870 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, |
3871 | ExtInfo Info) { |
3872 | Info.Profile(ID); |
3873 | ID.AddPointer(ResultType.getAsOpaquePtr()); |
3874 | } |
3875 | |
3876 | static bool classof(const Type *T) { |
3877 | return T->getTypeClass() == FunctionNoProto; |
3878 | } |
3879 | }; |
3880 | |
3881 | /// Represents a prototype with parameter type info, e.g. |
3882 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no |
3883 | /// parameters, not as having a single void parameter. Such a type can have |
3884 | /// an exception specification, but this specification is not part of the |
3885 | /// canonical type. FunctionProtoType has several trailing objects, some of |
3886 | /// which optional. For more information about the trailing objects see |
3887 | /// the first comment inside FunctionProtoType. |
3888 | class FunctionProtoType final |
3889 | : public FunctionType, |
3890 | public llvm::FoldingSetNode, |
3891 | private llvm::TrailingObjects< |
3892 | FunctionProtoType, QualType, SourceLocation, |
3893 | FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType, |
3894 | Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> { |
3895 | friend class ASTContext; // ASTContext creates these. |
3896 | friend TrailingObjects; |
3897 | |
3898 | // FunctionProtoType is followed by several trailing objects, some of |
3899 | // which optional. They are in order: |
3900 | // |
3901 | // * An array of getNumParams() QualType holding the parameter types. |
3902 | // Always present. Note that for the vast majority of FunctionProtoType, |
3903 | // these will be the only trailing objects. |
3904 | // |
3905 | // * Optionally if the function is variadic, the SourceLocation of the |
3906 | // ellipsis. |
3907 | // |
3908 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields |
3909 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): |
3910 | // a single FunctionTypeExtraBitfields. Present if and only if |
3911 | // hasExtraBitfields() is true. |
3912 | // |
3913 | // * Optionally exactly one of: |
3914 | // * an array of getNumExceptions() ExceptionType, |
3915 | // * a single Expr *, |
3916 | // * a pair of FunctionDecl *, |
3917 | // * a single FunctionDecl * |
3918 | // used to store information about the various types of exception |
3919 | // specification. See getExceptionSpecSize for the details. |
3920 | // |
3921 | // * Optionally an array of getNumParams() ExtParameterInfo holding |
3922 | // an ExtParameterInfo for each of the parameters. Present if and |
3923 | // only if hasExtParameterInfos() is true. |
3924 | // |
3925 | // * Optionally a Qualifiers object to represent extra qualifiers that can't |
3926 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only |
3927 | // if hasExtQualifiers() is true. |
3928 | // |
3929 | // The optional FunctionTypeExtraBitfields has to be before the data |
3930 | // related to the exception specification since it contains the number |
3931 | // of exception types. |
3932 | // |
3933 | // We put the ExtParameterInfos last. If all were equal, it would make |
3934 | // more sense to put these before the exception specification, because |
3935 | // it's much easier to skip past them compared to the elaborate switch |
3936 | // required to skip the exception specification. However, all is not |
3937 | // equal; ExtParameterInfos are used to model very uncommon features, |
3938 | // and it's better not to burden the more common paths. |
3939 | |
3940 | public: |
3941 | /// Holds information about the various types of exception specification. |
3942 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is |
3943 | /// used to group together the various bits of information about the |
3944 | /// exception specification. |
3945 | struct ExceptionSpecInfo { |
3946 | /// The kind of exception specification this is. |
3947 | ExceptionSpecificationType Type = EST_None; |
3948 | |
3949 | /// Explicitly-specified list of exception types. |
3950 | ArrayRef<QualType> Exceptions; |
3951 | |
3952 | /// Noexcept expression, if this is a computed noexcept specification. |
3953 | Expr *NoexceptExpr = nullptr; |
3954 | |
3955 | /// The function whose exception specification this is, for |
3956 | /// EST_Unevaluated and EST_Uninstantiated. |
3957 | FunctionDecl *SourceDecl = nullptr; |
3958 | |
3959 | /// The function template whose exception specification this is instantiated |
3960 | /// from, for EST_Uninstantiated. |
3961 | FunctionDecl *SourceTemplate = nullptr; |
3962 | |
3963 | ExceptionSpecInfo() = default; |
3964 | |
3965 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} |
3966 | }; |
3967 | |
3968 | /// Extra information about a function prototype. ExtProtoInfo is not |
3969 | /// stored as such in FunctionProtoType but is used to group together |
3970 | /// the various bits of extra information about a function prototype. |
3971 | struct ExtProtoInfo { |
3972 | FunctionType::ExtInfo ExtInfo; |
3973 | bool Variadic : 1; |
3974 | bool HasTrailingReturn : 1; |
3975 | Qualifiers TypeQuals; |
3976 | RefQualifierKind RefQualifier = RQ_None; |
3977 | ExceptionSpecInfo ExceptionSpec; |
3978 | const ExtParameterInfo *ExtParameterInfos = nullptr; |
3979 | SourceLocation EllipsisLoc; |
3980 | |
3981 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} |
3982 | |
3983 | ExtProtoInfo(CallingConv CC) |
3984 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} |
3985 | |
3986 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { |
3987 | ExtProtoInfo Result(*this); |
3988 | Result.ExceptionSpec = ESI; |
3989 | return Result; |
3990 | } |
3991 | }; |
3992 | |
3993 | private: |
3994 | unsigned numTrailingObjects(OverloadToken<QualType>) const { |
3995 | return getNumParams(); |
3996 | } |
3997 | |
3998 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { |
3999 | return isVariadic(); |
4000 | } |
4001 | |
4002 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { |
4003 | return hasExtraBitfields(); |
4004 | } |
4005 | |
4006 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { |
4007 | return getExceptionSpecSize().NumExceptionType; |
4008 | } |
4009 | |
4010 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { |
4011 | return getExceptionSpecSize().NumExprPtr; |
4012 | } |
4013 | |
4014 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { |
4015 | return getExceptionSpecSize().NumFunctionDeclPtr; |
4016 | } |
4017 | |
4018 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { |
4019 | return hasExtParameterInfos() ? getNumParams() : 0; |
4020 | } |
4021 | |
4022 | /// Determine whether there are any argument types that |
4023 | /// contain an unexpanded parameter pack. |
4024 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, |
4025 | unsigned numArgs) { |
4026 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) |
4027 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) |
4028 | return true; |
4029 | |
4030 | return false; |
4031 | } |
4032 | |
4033 | FunctionProtoType(QualType result, ArrayRef<QualType> params, |
4034 | QualType canonical, const ExtProtoInfo &epi); |
4035 | |
4036 | /// This struct is returned by getExceptionSpecSize and is used to |
4037 | /// translate an ExceptionSpecificationType to the number and kind |
4038 | /// of trailing objects related to the exception specification. |
4039 | struct ExceptionSpecSizeHolder { |
4040 | unsigned NumExceptionType; |
4041 | unsigned NumExprPtr; |
4042 | unsigned NumFunctionDeclPtr; |
4043 | }; |
4044 | |
4045 | /// Return the number and kind of trailing objects |
4046 | /// related to the exception specification. |
4047 | static ExceptionSpecSizeHolder |
4048 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { |
4049 | switch (EST) { |
4050 | case EST_None: |
4051 | case EST_DynamicNone: |
4052 | case EST_MSAny: |
4053 | case EST_BasicNoexcept: |
4054 | case EST_Unparsed: |
4055 | case EST_NoThrow: |
4056 | return {0, 0, 0}; |
4057 | |
4058 | case EST_Dynamic: |
4059 | return {NumExceptions, 0, 0}; |
4060 | |
4061 | case EST_DependentNoexcept: |
4062 | case EST_NoexceptFalse: |
4063 | case EST_NoexceptTrue: |
4064 | return {0, 1, 0}; |
4065 | |
4066 | case EST_Uninstantiated: |
4067 | return {0, 0, 2}; |
4068 | |
4069 | case EST_Unevaluated: |
4070 | return {0, 0, 1}; |
4071 | } |
4072 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4072); |
4073 | } |
4074 | |
4075 | /// Return the number and kind of trailing objects |
4076 | /// related to the exception specification. |
4077 | ExceptionSpecSizeHolder getExceptionSpecSize() const { |
4078 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); |
4079 | } |
4080 | |
4081 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4082 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { |
4083 | // If the exception spec type is EST_Dynamic then we have > 0 exception |
4084 | // types and the exact number is stored in FunctionTypeExtraBitfields. |
4085 | return EST == EST_Dynamic; |
4086 | } |
4087 | |
4088 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4089 | bool hasExtraBitfields() const { |
4090 | return hasExtraBitfields(getExceptionSpecType()); |
4091 | } |
4092 | |
4093 | bool hasExtQualifiers() const { |
4094 | return FunctionTypeBits.HasExtQuals; |
4095 | } |
4096 | |
4097 | public: |
4098 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } |
4099 | |
4100 | QualType getParamType(unsigned i) const { |
4101 | assert(i < getNumParams() && "invalid parameter index")(static_cast <bool> (i < getNumParams() && "invalid parameter index" ) ? void (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4101, __extension__ __PRETTY_FUNCTION__)); |
4102 | return param_type_begin()[i]; |
4103 | } |
4104 | |
4105 | ArrayRef<QualType> getParamTypes() const { |
4106 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); |
4107 | } |
4108 | |
4109 | ExtProtoInfo getExtProtoInfo() const { |
4110 | ExtProtoInfo EPI; |
4111 | EPI.ExtInfo = getExtInfo(); |
4112 | EPI.Variadic = isVariadic(); |
4113 | EPI.EllipsisLoc = getEllipsisLoc(); |
4114 | EPI.HasTrailingReturn = hasTrailingReturn(); |
4115 | EPI.ExceptionSpec = getExceptionSpecInfo(); |
4116 | EPI.TypeQuals = getMethodQuals(); |
4117 | EPI.RefQualifier = getRefQualifier(); |
4118 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); |
4119 | return EPI; |
4120 | } |
4121 | |
4122 | /// Get the kind of exception specification on this function. |
4123 | ExceptionSpecificationType getExceptionSpecType() const { |
4124 | return static_cast<ExceptionSpecificationType>( |
4125 | FunctionTypeBits.ExceptionSpecType); |
4126 | } |
4127 | |
4128 | /// Return whether this function has any kind of exception spec. |
4129 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } |
4130 | |
4131 | /// Return whether this function has a dynamic (throw) exception spec. |
4132 | bool hasDynamicExceptionSpec() const { |
4133 | return isDynamicExceptionSpec(getExceptionSpecType()); |
4134 | } |
4135 | |
4136 | /// Return whether this function has a noexcept exception spec. |
4137 | bool hasNoexceptExceptionSpec() const { |
4138 | return isNoexceptExceptionSpec(getExceptionSpecType()); |
4139 | } |
4140 | |
4141 | /// Return whether this function has a dependent exception spec. |
4142 | bool hasDependentExceptionSpec() const; |
4143 | |
4144 | /// Return whether this function has an instantiation-dependent exception |
4145 | /// spec. |
4146 | bool hasInstantiationDependentExceptionSpec() const; |
4147 | |
4148 | /// Return all the available information about this type's exception spec. |
4149 | ExceptionSpecInfo getExceptionSpecInfo() const { |
4150 | ExceptionSpecInfo Result; |
4151 | Result.Type = getExceptionSpecType(); |
4152 | if (Result.Type == EST_Dynamic) { |
4153 | Result.Exceptions = exceptions(); |
4154 | } else if (isComputedNoexcept(Result.Type)) { |
4155 | Result.NoexceptExpr = getNoexceptExpr(); |
4156 | } else if (Result.Type == EST_Uninstantiated) { |
4157 | Result.SourceDecl = getExceptionSpecDecl(); |
4158 | Result.SourceTemplate = getExceptionSpecTemplate(); |
4159 | } else if (Result.Type == EST_Unevaluated) { |
4160 | Result.SourceDecl = getExceptionSpecDecl(); |
4161 | } |
4162 | return Result; |
4163 | } |
4164 | |
4165 | /// Return the number of types in the exception specification. |
4166 | unsigned getNumExceptions() const { |
4167 | return getExceptionSpecType() == EST_Dynamic |
4168 | ? getTrailingObjects<FunctionTypeExtraBitfields>() |
4169 | ->NumExceptionType |
4170 | : 0; |
4171 | } |
4172 | |
4173 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). |
4174 | QualType getExceptionType(unsigned i) const { |
4175 | assert(i < getNumExceptions() && "Invalid exception number!")(static_cast <bool> (i < getNumExceptions() && "Invalid exception number!") ? void (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4175, __extension__ __PRETTY_FUNCTION__)); |
4176 | return exception_begin()[i]; |
4177 | } |
4178 | |
4179 | /// Return the expression inside noexcept(expression), or a null pointer |
4180 | /// if there is none (because the exception spec is not of this form). |
4181 | Expr *getNoexceptExpr() const { |
4182 | if (!isComputedNoexcept(getExceptionSpecType())) |
4183 | return nullptr; |
4184 | return *getTrailingObjects<Expr *>(); |
4185 | } |
4186 | |
4187 | /// If this function type has an exception specification which hasn't |
4188 | /// been determined yet (either because it has not been evaluated or because |
4189 | /// it has not been instantiated), this is the function whose exception |
4190 | /// specification is represented by this type. |
4191 | FunctionDecl *getExceptionSpecDecl() const { |
4192 | if (getExceptionSpecType() != EST_Uninstantiated && |
4193 | getExceptionSpecType() != EST_Unevaluated) |
4194 | return nullptr; |
4195 | return getTrailingObjects<FunctionDecl *>()[0]; |
4196 | } |
4197 | |
4198 | /// If this function type has an uninstantiated exception |
4199 | /// specification, this is the function whose exception specification |
4200 | /// should be instantiated to find the exception specification for |
4201 | /// this type. |
4202 | FunctionDecl *getExceptionSpecTemplate() const { |
4203 | if (getExceptionSpecType() != EST_Uninstantiated) |
4204 | return nullptr; |
4205 | return getTrailingObjects<FunctionDecl *>()[1]; |
4206 | } |
4207 | |
4208 | /// Determine whether this function type has a non-throwing exception |
4209 | /// specification. |
4210 | CanThrowResult canThrow() const; |
4211 | |
4212 | /// Determine whether this function type has a non-throwing exception |
4213 | /// specification. If this depends on template arguments, returns |
4214 | /// \c ResultIfDependent. |
4215 | bool isNothrow(bool ResultIfDependent = false) const { |
4216 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; |
4217 | } |
4218 | |
4219 | /// Whether this function prototype is variadic. |
4220 | bool isVariadic() const { return FunctionTypeBits.Variadic; } |
4221 | |
4222 | SourceLocation getEllipsisLoc() const { |
4223 | return isVariadic() ? *getTrailingObjects<SourceLocation>() |
4224 | : SourceLocation(); |
4225 | } |
4226 | |
4227 | /// Determines whether this function prototype contains a |
4228 | /// parameter pack at the end. |
4229 | /// |
4230 | /// A function template whose last parameter is a parameter pack can be |
4231 | /// called with an arbitrary number of arguments, much like a variadic |
4232 | /// function. |
4233 | bool isTemplateVariadic() const; |
4234 | |
4235 | /// Whether this function prototype has a trailing return type. |
4236 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } |
4237 | |
4238 | Qualifiers getMethodQuals() const { |
4239 | if (hasExtQualifiers()) |
4240 | return *getTrailingObjects<Qualifiers>(); |
4241 | else |
4242 | return getFastTypeQuals(); |
4243 | } |
4244 | |
4245 | /// Retrieve the ref-qualifier associated with this function type. |
4246 | RefQualifierKind getRefQualifier() const { |
4247 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); |
4248 | } |
4249 | |
4250 | using param_type_iterator = const QualType *; |
4251 | using param_type_range = llvm::iterator_range<param_type_iterator>; |
4252 | |
4253 | param_type_range param_types() const { |
4254 | return param_type_range(param_type_begin(), param_type_end()); |
4255 | } |
4256 | |
4257 | param_type_iterator param_type_begin() const { |
4258 | return getTrailingObjects<QualType>(); |
4259 | } |
4260 | |
4261 | param_type_iterator param_type_end() const { |
4262 | return param_type_begin() + getNumParams(); |
4263 | } |
4264 | |
4265 | using exception_iterator = const QualType *; |
4266 | |
4267 | ArrayRef<QualType> exceptions() const { |
4268 | return llvm::makeArrayRef(exception_begin(), exception_end()); |
4269 | } |
4270 | |
4271 | exception_iterator exception_begin() const { |
4272 | return reinterpret_cast<exception_iterator>( |
4273 | getTrailingObjects<ExceptionType>()); |
4274 | } |
4275 | |
4276 | exception_iterator exception_end() const { |
4277 | return exception_begin() + getNumExceptions(); |
4278 | } |
4279 | |
4280 | /// Is there any interesting extra information for any of the parameters |
4281 | /// of this function type? |
4282 | bool hasExtParameterInfos() const { |
4283 | return FunctionTypeBits.HasExtParameterInfos; |
4284 | } |
4285 | |
4286 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { |
4287 | assert(hasExtParameterInfos())(static_cast <bool> (hasExtParameterInfos()) ? void (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4287, __extension__ __PRETTY_FUNCTION__)); |
4288 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), |
4289 | getNumParams()); |
4290 | } |
4291 | |
4292 | /// Return a pointer to the beginning of the array of extra parameter |
4293 | /// information, if present, or else null if none of the parameters |
4294 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. |
4295 | const ExtParameterInfo *getExtParameterInfosOrNull() const { |
4296 | if (!hasExtParameterInfos()) |
4297 | return nullptr; |
4298 | return getTrailingObjects<ExtParameterInfo>(); |
4299 | } |
4300 | |
4301 | ExtParameterInfo getExtParameterInfo(unsigned I) const { |
4302 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4302, __extension__ __PRETTY_FUNCTION__)); |
4303 | if (hasExtParameterInfos()) |
4304 | return getTrailingObjects<ExtParameterInfo>()[I]; |
4305 | return ExtParameterInfo(); |
4306 | } |
4307 | |
4308 | ParameterABI getParameterABI(unsigned I) const { |
4309 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4309, __extension__ __PRETTY_FUNCTION__)); |
4310 | if (hasExtParameterInfos()) |
4311 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); |
4312 | return ParameterABI::Ordinary; |
4313 | } |
4314 | |
4315 | bool isParamConsumed(unsigned I) const { |
4316 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4316, __extension__ __PRETTY_FUNCTION__)); |
4317 | if (hasExtParameterInfos()) |
4318 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); |
4319 | return false; |
4320 | } |
4321 | |
4322 | bool isSugared() const { return false; } |
4323 | QualType desugar() const { return QualType(this, 0); } |
4324 | |
4325 | void printExceptionSpecification(raw_ostream &OS, |
4326 | const PrintingPolicy &Policy) const; |
4327 | |
4328 | static bool classof(const Type *T) { |
4329 | return T->getTypeClass() == FunctionProto; |
4330 | } |
4331 | |
4332 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); |
4333 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, |
4334 | param_type_iterator ArgTys, unsigned NumArgs, |
4335 | const ExtProtoInfo &EPI, const ASTContext &Context, |
4336 | bool Canonical); |
4337 | }; |
4338 | |
4339 | /// Represents the dependent type named by a dependently-scoped |
4340 | /// typename using declaration, e.g. |
4341 | /// using typename Base<T>::foo; |
4342 | /// |
4343 | /// Template instantiation turns these into the underlying type. |
4344 | class UnresolvedUsingType : public Type { |
4345 | friend class ASTContext; // ASTContext creates these. |
4346 | |
4347 | UnresolvedUsingTypenameDecl *Decl; |
4348 | |
4349 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) |
4350 | : Type(UnresolvedUsing, QualType(), |
4351 | TypeDependence::DependentInstantiation), |
4352 | Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {} |
4353 | |
4354 | public: |
4355 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } |
4356 | |
4357 | bool isSugared() const { return false; } |
4358 | QualType desugar() const { return QualType(this, 0); } |
4359 | |
4360 | static bool classof(const Type *T) { |
4361 | return T->getTypeClass() == UnresolvedUsing; |
4362 | } |
4363 | |
4364 | void Profile(llvm::FoldingSetNodeID &ID) { |
4365 | return Profile(ID, Decl); |
4366 | } |
4367 | |
4368 | static void Profile(llvm::FoldingSetNodeID &ID, |
4369 | UnresolvedUsingTypenameDecl *D) { |
4370 | ID.AddPointer(D); |
4371 | } |
4372 | }; |
4373 | |
4374 | class TypedefType : public Type { |
4375 | TypedefNameDecl *Decl; |
4376 | |
4377 | private: |
4378 | friend class ASTContext; // ASTContext creates these. |
4379 | |
4380 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying, |
4381 | QualType can); |
4382 | |
4383 | public: |
4384 | TypedefNameDecl *getDecl() const { return Decl; } |
4385 | |
4386 | bool isSugared() const { return true; } |
4387 | QualType desugar() const; |
4388 | |
4389 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } |
4390 | }; |
4391 | |
4392 | /// Sugar type that represents a type that was qualified by a qualifier written |
4393 | /// as a macro invocation. |
4394 | class MacroQualifiedType : public Type { |
4395 | friend class ASTContext; // ASTContext creates these. |
4396 | |
4397 | QualType UnderlyingTy; |
4398 | const IdentifierInfo *MacroII; |
4399 | |
4400 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, |
4401 | const IdentifierInfo *MacroII) |
4402 | : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()), |
4403 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { |
4404 | assert(isa<AttributedType>(UnderlyingTy) &&(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4405, __extension__ __PRETTY_FUNCTION__)) |
4405 | "Expected a macro qualified type to only wrap attributed types.")(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4405, __extension__ __PRETTY_FUNCTION__)); |
4406 | } |
4407 | |
4408 | public: |
4409 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } |
4410 | QualType getUnderlyingType() const { return UnderlyingTy; } |
4411 | |
4412 | /// Return this attributed type's modified type with no qualifiers attached to |
4413 | /// it. |
4414 | QualType getModifiedType() const; |
4415 | |
4416 | bool isSugared() const { return true; } |
4417 | QualType desugar() const; |
4418 | |
4419 | static bool classof(const Type *T) { |
4420 | return T->getTypeClass() == MacroQualified; |
4421 | } |
4422 | }; |
4423 | |
4424 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). |
4425 | class TypeOfExprType : public Type { |
4426 | Expr *TOExpr; |
4427 | |
4428 | protected: |
4429 | friend class ASTContext; // ASTContext creates these. |
4430 | |
4431 | TypeOfExprType(Expr *E, QualType can = QualType()); |
4432 | |
4433 | public: |
4434 | Expr *getUnderlyingExpr() const { return TOExpr; } |
4435 | |
4436 | /// Remove a single level of sugar. |
4437 | QualType desugar() const; |
4438 | |
4439 | /// Returns whether this type directly provides sugar. |
4440 | bool isSugared() const; |
4441 | |
4442 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } |
4443 | }; |
4444 | |
4445 | /// Internal representation of canonical, dependent |
4446 | /// `typeof(expr)` types. |
4447 | /// |
4448 | /// This class is used internally by the ASTContext to manage |
4449 | /// canonical, dependent types, only. Clients will only see instances |
4450 | /// of this class via TypeOfExprType nodes. |
4451 | class DependentTypeOfExprType |
4452 | : public TypeOfExprType, public llvm::FoldingSetNode { |
4453 | const ASTContext &Context; |
4454 | |
4455 | public: |
4456 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) |
4457 | : TypeOfExprType(E), Context(Context) {} |
4458 | |
4459 | void Profile(llvm::FoldingSetNodeID &ID) { |
4460 | Profile(ID, Context, getUnderlyingExpr()); |
4461 | } |
4462 | |
4463 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4464 | Expr *E); |
4465 | }; |
4466 | |
4467 | /// Represents `typeof(type)`, a GCC extension. |
4468 | class TypeOfType : public Type { |
4469 | friend class ASTContext; // ASTContext creates these. |
4470 | |
4471 | QualType TOType; |
4472 | |
4473 | TypeOfType(QualType T, QualType can) |
4474 | : Type(TypeOf, can, T->getDependence()), TOType(T) { |
4475 | assert(!isa<TypedefType>(can) && "Invalid canonical type")(static_cast <bool> (!isa<TypedefType>(can) && "Invalid canonical type") ? void (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4475, __extension__ __PRETTY_FUNCTION__)); |
4476 | } |
4477 | |
4478 | public: |
4479 | QualType getUnderlyingType() const { return TOType; } |
4480 | |
4481 | /// Remove a single level of sugar. |
4482 | QualType desugar() const { return getUnderlyingType(); } |
4483 | |
4484 | /// Returns whether this type directly provides sugar. |
4485 | bool isSugared() const { return true; } |
4486 | |
4487 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } |
4488 | }; |
4489 | |
4490 | /// Represents the type `decltype(expr)` (C++11). |
4491 | class DecltypeType : public Type { |
4492 | Expr *E; |
4493 | QualType UnderlyingType; |
4494 | |
4495 | protected: |
4496 | friend class ASTContext; // ASTContext creates these. |
4497 | |
4498 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); |
4499 | |
4500 | public: |
4501 | Expr *getUnderlyingExpr() const { return E; } |
4502 | QualType getUnderlyingType() const { return UnderlyingType; } |
4503 | |
4504 | /// Remove a single level of sugar. |
4505 | QualType desugar() const; |
4506 | |
4507 | /// Returns whether this type directly provides sugar. |
4508 | bool isSugared() const; |
4509 | |
4510 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } |
4511 | }; |
4512 | |
4513 | /// Internal representation of canonical, dependent |
4514 | /// decltype(expr) types. |
4515 | /// |
4516 | /// This class is used internally by the ASTContext to manage |
4517 | /// canonical, dependent types, only. Clients will only see instances |
4518 | /// of this class via DecltypeType nodes. |
4519 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { |
4520 | const ASTContext &Context; |
4521 | |
4522 | public: |
4523 | DependentDecltypeType(const ASTContext &Context, Expr *E); |
4524 | |
4525 | void Profile(llvm::FoldingSetNodeID &ID) { |
4526 | Profile(ID, Context, getUnderlyingExpr()); |
4527 | } |
4528 | |
4529 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4530 | Expr *E); |
4531 | }; |
4532 | |
4533 | /// A unary type transform, which is a type constructed from another. |
4534 | class UnaryTransformType : public Type { |
4535 | public: |
4536 | enum UTTKind { |
4537 | EnumUnderlyingType |
4538 | }; |
4539 | |
4540 | private: |
4541 | /// The untransformed type. |
4542 | QualType BaseType; |
4543 | |
4544 | /// The transformed type if not dependent, otherwise the same as BaseType. |
4545 | QualType UnderlyingType; |
4546 | |
4547 | UTTKind UKind; |
4548 | |
4549 | protected: |
4550 | friend class ASTContext; |
4551 | |
4552 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, |
4553 | QualType CanonicalTy); |
4554 | |
4555 | public: |
4556 | bool isSugared() const { return !isDependentType(); } |
4557 | QualType desugar() const { return UnderlyingType; } |
4558 | |
4559 | QualType getUnderlyingType() const { return UnderlyingType; } |
4560 | QualType getBaseType() const { return BaseType; } |
4561 | |
4562 | UTTKind getUTTKind() const { return UKind; } |
4563 | |
4564 | static bool classof(const Type *T) { |
4565 | return T->getTypeClass() == UnaryTransform; |
4566 | } |
4567 | }; |
4568 | |
4569 | /// Internal representation of canonical, dependent |
4570 | /// __underlying_type(type) types. |
4571 | /// |
4572 | /// This class is used internally by the ASTContext to manage |
4573 | /// canonical, dependent types, only. Clients will only see instances |
4574 | /// of this class via UnaryTransformType nodes. |
4575 | class DependentUnaryTransformType : public UnaryTransformType, |
4576 | public llvm::FoldingSetNode { |
4577 | public: |
4578 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, |
4579 | UTTKind UKind); |
4580 | |
4581 | void Profile(llvm::FoldingSetNodeID &ID) { |
4582 | Profile(ID, getBaseType(), getUTTKind()); |
4583 | } |
4584 | |
4585 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, |
4586 | UTTKind UKind) { |
4587 | ID.AddPointer(BaseType.getAsOpaquePtr()); |
4588 | ID.AddInteger((unsigned)UKind); |
4589 | } |
4590 | }; |
4591 | |
4592 | class TagType : public Type { |
4593 | friend class ASTReader; |
4594 | template <class T> friend class serialization::AbstractTypeReader; |
4595 | |
4596 | /// Stores the TagDecl associated with this type. The decl may point to any |
4597 | /// TagDecl that declares the entity. |
4598 | TagDecl *decl; |
4599 | |
4600 | protected: |
4601 | TagType(TypeClass TC, const TagDecl *D, QualType can); |
4602 | |
4603 | public: |
4604 | TagDecl *getDecl() const; |
4605 | |
4606 | /// Determines whether this type is in the process of being defined. |
4607 | bool isBeingDefined() const; |
4608 | |
4609 | static bool classof(const Type *T) { |
4610 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; |
4611 | } |
4612 | }; |
4613 | |
4614 | /// A helper class that allows the use of isa/cast/dyncast |
4615 | /// to detect TagType objects of structs/unions/classes. |
4616 | class RecordType : public TagType { |
4617 | protected: |
4618 | friend class ASTContext; // ASTContext creates these. |
4619 | |
4620 | explicit RecordType(const RecordDecl *D) |
4621 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4622 | explicit RecordType(TypeClass TC, RecordDecl *D) |
4623 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4624 | |
4625 | public: |
4626 | RecordDecl *getDecl() const { |
4627 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); |
4628 | } |
4629 | |
4630 | /// Recursively check all fields in the record for const-ness. If any field |
4631 | /// is declared const, return true. Otherwise, return false. |
4632 | bool hasConstFields() const; |
4633 | |
4634 | bool isSugared() const { return false; } |
4635 | QualType desugar() const { return QualType(this, 0); } |
4636 | |
4637 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } |
4638 | }; |
4639 | |
4640 | /// A helper class that allows the use of isa/cast/dyncast |
4641 | /// to detect TagType objects of enums. |
4642 | class EnumType : public TagType { |
4643 | friend class ASTContext; // ASTContext creates these. |
4644 | |
4645 | explicit EnumType(const EnumDecl *D) |
4646 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4647 | |
4648 | public: |
4649 | EnumDecl *getDecl() const { |
4650 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); |
4651 | } |
4652 | |
4653 | bool isSugared() const { return false; } |
4654 | QualType desugar() const { return QualType(this, 0); } |
4655 | |
4656 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } |
4657 | }; |
4658 | |
4659 | /// An attributed type is a type to which a type attribute has been applied. |
4660 | /// |
4661 | /// The "modified type" is the fully-sugared type to which the attributed |
4662 | /// type was applied; generally it is not canonically equivalent to the |
4663 | /// attributed type. The "equivalent type" is the minimally-desugared type |
4664 | /// which the type is canonically equivalent to. |
4665 | /// |
4666 | /// For example, in the following attributed type: |
4667 | /// int32_t __attribute__((vector_size(16))) |
4668 | /// - the modified type is the TypedefType for int32_t |
4669 | /// - the equivalent type is VectorType(16, int32_t) |
4670 | /// - the canonical type is VectorType(16, int) |
4671 | class AttributedType : public Type, public llvm::FoldingSetNode { |
4672 | public: |
4673 | using Kind = attr::Kind; |
4674 | |
4675 | private: |
4676 | friend class ASTContext; // ASTContext creates these |
4677 | |
4678 | QualType ModifiedType; |
4679 | QualType EquivalentType; |
4680 | |
4681 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, |
4682 | QualType equivalent) |
4683 | : Type(Attributed, canon, equivalent->getDependence()), |
4684 | ModifiedType(modified), EquivalentType(equivalent) { |
4685 | AttributedTypeBits.AttrKind = attrKind; |
4686 | } |
4687 | |
4688 | public: |
4689 | Kind getAttrKind() const { |
4690 | return static_cast<Kind>(AttributedTypeBits.AttrKind); |
4691 | } |
4692 | |
4693 | QualType getModifiedType() const { return ModifiedType; } |
4694 | QualType getEquivalentType() const { return EquivalentType; } |
4695 | |
4696 | bool isSugared() const { return true; } |
4697 | QualType desugar() const { return getEquivalentType(); } |
4698 | |
4699 | /// Does this attribute behave like a type qualifier? |
4700 | /// |
4701 | /// A type qualifier adjusts a type to provide specialized rules for |
4702 | /// a specific object, like the standard const and volatile qualifiers. |
4703 | /// This includes attributes controlling things like nullability, |
4704 | /// address spaces, and ARC ownership. The value of the object is still |
4705 | /// largely described by the modified type. |
4706 | /// |
4707 | /// In contrast, many type attributes "rewrite" their modified type to |
4708 | /// produce a fundamentally different type, not necessarily related in any |
4709 | /// formalizable way to the original type. For example, calling convention |
4710 | /// and vector attributes are not simple type qualifiers. |
4711 | /// |
4712 | /// Type qualifiers are often, but not always, reflected in the canonical |
4713 | /// type. |
4714 | bool isQualifier() const; |
4715 | |
4716 | bool isMSTypeSpec() const; |
4717 | |
4718 | bool isCallingConv() const; |
4719 | |
4720 | llvm::Optional<NullabilityKind> getImmediateNullability() const; |
4721 | |
4722 | /// Retrieve the attribute kind corresponding to the given |
4723 | /// nullability kind. |
4724 | static Kind getNullabilityAttrKind(NullabilityKind kind) { |
4725 | switch (kind) { |
4726 | case NullabilityKind::NonNull: |
4727 | return attr::TypeNonNull; |
4728 | |
4729 | case NullabilityKind::Nullable: |
4730 | return attr::TypeNullable; |
4731 | |
4732 | case NullabilityKind::NullableResult: |
4733 | return attr::TypeNullableResult; |
4734 | |
4735 | case NullabilityKind::Unspecified: |
4736 | return attr::TypeNullUnspecified; |
4737 | } |
4738 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4738); |
4739 | } |
4740 | |
4741 | /// Strip off the top-level nullability annotation on the given |
4742 | /// type, if it's there. |
4743 | /// |
4744 | /// \param T The type to strip. If the type is exactly an |
4745 | /// AttributedType specifying nullability (without looking through |
4746 | /// type sugar), the nullability is returned and this type changed |
4747 | /// to the underlying modified type. |
4748 | /// |
4749 | /// \returns the top-level nullability, if present. |
4750 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); |
4751 | |
4752 | void Profile(llvm::FoldingSetNodeID &ID) { |
4753 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); |
4754 | } |
4755 | |
4756 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, |
4757 | QualType modified, QualType equivalent) { |
4758 | ID.AddInteger(attrKind); |
4759 | ID.AddPointer(modified.getAsOpaquePtr()); |
4760 | ID.AddPointer(equivalent.getAsOpaquePtr()); |
4761 | } |
4762 | |
4763 | static bool classof(const Type *T) { |
4764 | return T->getTypeClass() == Attributed; |
4765 | } |
4766 | }; |
4767 | |
4768 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4769 | friend class ASTContext; // ASTContext creates these |
4770 | |
4771 | // Helper data collector for canonical types. |
4772 | struct CanonicalTTPTInfo { |
4773 | unsigned Depth : 15; |
4774 | unsigned ParameterPack : 1; |
4775 | unsigned Index : 16; |
4776 | }; |
4777 | |
4778 | union { |
4779 | // Info for the canonical type. |
4780 | CanonicalTTPTInfo CanTTPTInfo; |
4781 | |
4782 | // Info for the non-canonical type. |
4783 | TemplateTypeParmDecl *TTPDecl; |
4784 | }; |
4785 | |
4786 | /// Build a non-canonical type. |
4787 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) |
4788 | : Type(TemplateTypeParm, Canon, |
4789 | TypeDependence::DependentInstantiation | |
4790 | (Canon->getDependence() & TypeDependence::UnexpandedPack)), |
4791 | TTPDecl(TTPDecl) {} |
4792 | |
4793 | /// Build the canonical type. |
4794 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) |
4795 | : Type(TemplateTypeParm, QualType(this, 0), |
4796 | TypeDependence::DependentInstantiation | |
4797 | (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) { |
4798 | CanTTPTInfo.Depth = D; |
4799 | CanTTPTInfo.Index = I; |
4800 | CanTTPTInfo.ParameterPack = PP; |
4801 | } |
4802 | |
4803 | const CanonicalTTPTInfo& getCanTTPTInfo() const { |
4804 | QualType Can = getCanonicalTypeInternal(); |
4805 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; |
4806 | } |
4807 | |
4808 | public: |
4809 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } |
4810 | unsigned getIndex() const { return getCanTTPTInfo().Index; } |
4811 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } |
4812 | |
4813 | TemplateTypeParmDecl *getDecl() const { |
4814 | return isCanonicalUnqualified() ? nullptr : TTPDecl; |
4815 | } |
4816 | |
4817 | IdentifierInfo *getIdentifier() const; |
4818 | |
4819 | bool isSugared() const { return false; } |
4820 | QualType desugar() const { return QualType(this, 0); } |
4821 | |
4822 | void Profile(llvm::FoldingSetNodeID &ID) { |
4823 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); |
4824 | } |
4825 | |
4826 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, |
4827 | unsigned Index, bool ParameterPack, |
4828 | TemplateTypeParmDecl *TTPDecl) { |
4829 | ID.AddInteger(Depth); |
4830 | ID.AddInteger(Index); |
4831 | ID.AddBoolean(ParameterPack); |
4832 | ID.AddPointer(TTPDecl); |
4833 | } |
4834 | |
4835 | static bool classof(const Type *T) { |
4836 | return T->getTypeClass() == TemplateTypeParm; |
4837 | } |
4838 | }; |
4839 | |
4840 | /// Represents the result of substituting a type for a template |
4841 | /// type parameter. |
4842 | /// |
4843 | /// Within an instantiated template, all template type parameters have |
4844 | /// been replaced with these. They are used solely to record that a |
4845 | /// type was originally written as a template type parameter; |
4846 | /// therefore they are never canonical. |
4847 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4848 | friend class ASTContext; |
4849 | |
4850 | // The original type parameter. |
4851 | const TemplateTypeParmType *Replaced; |
4852 | |
4853 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) |
4854 | : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()), |
4855 | Replaced(Param) {} |
4856 | |
4857 | public: |
4858 | /// Gets the template parameter that was substituted for. |
4859 | const TemplateTypeParmType *getReplacedParameter() const { |
4860 | return Replaced; |
4861 | } |
4862 | |
4863 | /// Gets the type that was substituted for the template |
4864 | /// parameter. |
4865 | QualType getReplacementType() const { |
4866 | return getCanonicalTypeInternal(); |
4867 | } |
4868 | |
4869 | bool isSugared() const { return true; } |
4870 | QualType desugar() const { return getReplacementType(); } |
4871 | |
4872 | void Profile(llvm::FoldingSetNodeID &ID) { |
4873 | Profile(ID, getReplacedParameter(), getReplacementType()); |
4874 | } |
4875 | |
4876 | static void Profile(llvm::FoldingSetNodeID &ID, |
4877 | const TemplateTypeParmType *Replaced, |
4878 | QualType Replacement) { |
4879 | ID.AddPointer(Replaced); |
4880 | ID.AddPointer(Replacement.getAsOpaquePtr()); |
4881 | } |
4882 | |
4883 | static bool classof(const Type *T) { |
4884 | return T->getTypeClass() == SubstTemplateTypeParm; |
4885 | } |
4886 | }; |
4887 | |
4888 | /// Represents the result of substituting a set of types for a template |
4889 | /// type parameter pack. |
4890 | /// |
4891 | /// When a pack expansion in the source code contains multiple parameter packs |
4892 | /// and those parameter packs correspond to different levels of template |
4893 | /// parameter lists, this type node is used to represent a template type |
4894 | /// parameter pack from an outer level, which has already had its argument pack |
4895 | /// substituted but that still lives within a pack expansion that itself |
4896 | /// could not be instantiated. When actually performing a substitution into |
4897 | /// that pack expansion (e.g., when all template parameters have corresponding |
4898 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType |
4899 | /// at the current pack substitution index. |
4900 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { |
4901 | friend class ASTContext; |
4902 | |
4903 | /// The original type parameter. |
4904 | const TemplateTypeParmType *Replaced; |
4905 | |
4906 | /// A pointer to the set of template arguments that this |
4907 | /// parameter pack is instantiated with. |
4908 | const TemplateArgument *Arguments; |
4909 | |
4910 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, |
4911 | QualType Canon, |
4912 | const TemplateArgument &ArgPack); |
4913 | |
4914 | public: |
4915 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } |
4916 | |
4917 | /// Gets the template parameter that was substituted for. |
4918 | const TemplateTypeParmType *getReplacedParameter() const { |
4919 | return Replaced; |
4920 | } |
4921 | |
4922 | unsigned getNumArgs() const { |
4923 | return SubstTemplateTypeParmPackTypeBits.NumArgs; |
4924 | } |
4925 | |
4926 | bool isSugared() const { return false; } |
4927 | QualType desugar() const { return QualType(this, 0); } |
4928 | |
4929 | TemplateArgument getArgumentPack() const; |
4930 | |
4931 | void Profile(llvm::FoldingSetNodeID &ID); |
4932 | static void Profile(llvm::FoldingSetNodeID &ID, |
4933 | const TemplateTypeParmType *Replaced, |
4934 | const TemplateArgument &ArgPack); |
4935 | |
4936 | static bool classof(const Type *T) { |
4937 | return T->getTypeClass() == SubstTemplateTypeParmPack; |
4938 | } |
4939 | }; |
4940 | |
4941 | /// Common base class for placeholders for types that get replaced by |
4942 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced |
4943 | /// class template types, and constrained type names. |
4944 | /// |
4945 | /// These types are usually a placeholder for a deduced type. However, before |
4946 | /// the initializer is attached, or (usually) if the initializer is |
4947 | /// type-dependent, there is no deduced type and the type is canonical. In |
4948 | /// the latter case, it is also a dependent type. |
4949 | class DeducedType : public Type { |
4950 | protected: |
4951 | DeducedType(TypeClass TC, QualType DeducedAsType, |
4952 | TypeDependence ExtraDependence) |
4953 | : Type(TC, |
4954 | // FIXME: Retain the sugared deduced type? |
4955 | DeducedAsType.isNull() ? QualType(this, 0) |
4956 | : DeducedAsType.getCanonicalType(), |
4957 | ExtraDependence | (DeducedAsType.isNull() |
4958 | ? TypeDependence::None |
4959 | : DeducedAsType->getDependence() & |
4960 | ~TypeDependence::VariablyModified)) {} |
4961 | |
4962 | public: |
4963 | bool isSugared() const { return !isCanonicalUnqualified(); } |
4964 | QualType desugar() const { return getCanonicalTypeInternal(); } |
4965 | |
4966 | /// Get the type deduced for this placeholder type, or null if it's |
4967 | /// either not been deduced or was deduced to a dependent type. |
4968 | QualType getDeducedType() const { |
4969 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); |
4970 | } |
4971 | bool isDeduced() const { |
4972 | return !isCanonicalUnqualified() || isDependentType(); |
4973 | } |
4974 | |
4975 | static bool classof(const Type *T) { |
4976 | return T->getTypeClass() == Auto || |
4977 | T->getTypeClass() == DeducedTemplateSpecialization; |
4978 | } |
4979 | }; |
4980 | |
4981 | /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained |
4982 | /// by a type-constraint. |
4983 | class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode { |
4984 | friend class ASTContext; // ASTContext creates these |
4985 | |
4986 | ConceptDecl *TypeConstraintConcept; |
4987 | |
4988 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, |
4989 | TypeDependence ExtraDependence, ConceptDecl *CD, |
4990 | ArrayRef<TemplateArgument> TypeConstraintArgs); |
4991 | |
4992 | const TemplateArgument *getArgBuffer() const { |
4993 | return reinterpret_cast<const TemplateArgument*>(this+1); |
4994 | } |
4995 | |
4996 | TemplateArgument *getArgBuffer() { |
4997 | return reinterpret_cast<TemplateArgument*>(this+1); |
4998 | } |
4999 | |
5000 | public: |
5001 | /// Retrieve the template arguments. |
5002 | const TemplateArgument *getArgs() const { |
5003 | return getArgBuffer(); |
5004 | } |
5005 | |
5006 | /// Retrieve the number of template arguments. |
5007 | unsigned getNumArgs() const { |
5008 | return AutoTypeBits.NumArgs; |
5009 | } |
5010 | |
5011 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5012 | |
5013 | ArrayRef<TemplateArgument> getTypeConstraintArguments() const { |
5014 | return {getArgs(), getNumArgs()}; |
5015 | } |
5016 | |
5017 | ConceptDecl *getTypeConstraintConcept() const { |
5018 | return TypeConstraintConcept; |
5019 | } |
5020 | |
5021 | bool isConstrained() const { |
5022 | return TypeConstraintConcept != nullptr; |
5023 | } |
5024 | |
5025 | bool isDecltypeAuto() const { |
5026 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; |
5027 | } |
5028 | |
5029 | AutoTypeKeyword getKeyword() const { |
5030 | return (AutoTypeKeyword)AutoTypeBits.Keyword; |
5031 | } |
5032 | |
5033 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5034 | Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(), |
5035 | getTypeConstraintConcept(), getTypeConstraintArguments()); |
5036 | } |
5037 | |
5038 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
5039 | QualType Deduced, AutoTypeKeyword Keyword, |
5040 | bool IsDependent, ConceptDecl *CD, |
5041 | ArrayRef<TemplateArgument> Arguments); |
5042 | |
5043 | static bool classof(const Type *T) { |
5044 | return T->getTypeClass() == Auto; |
5045 | } |
5046 | }; |
5047 | |
5048 | /// Represents a C++17 deduced template specialization type. |
5049 | class DeducedTemplateSpecializationType : public DeducedType, |
5050 | public llvm::FoldingSetNode { |
5051 | friend class ASTContext; // ASTContext creates these |
5052 | |
5053 | /// The name of the template whose arguments will be deduced. |
5054 | TemplateName Template; |
5055 | |
5056 | DeducedTemplateSpecializationType(TemplateName Template, |
5057 | QualType DeducedAsType, |
5058 | bool IsDeducedAsDependent) |
5059 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, |
5060 | toTypeDependence(Template.getDependence()) | |
5061 | (IsDeducedAsDependent |
5062 | ? TypeDependence::DependentInstantiation |
5063 | : TypeDependence::None)), |
5064 | Template(Template) {} |
5065 | |
5066 | public: |
5067 | /// Retrieve the name of the template that we are deducing. |
5068 | TemplateName getTemplateName() const { return Template;} |
5069 | |
5070 | void Profile(llvm::FoldingSetNodeID &ID) { |
5071 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); |
5072 | } |
5073 | |
5074 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, |
5075 | QualType Deduced, bool IsDependent) { |
5076 | Template.Profile(ID); |
5077 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
5078 | ID.AddBoolean(IsDependent); |
5079 | } |
5080 | |
5081 | static bool classof(const Type *T) { |
5082 | return T->getTypeClass() == DeducedTemplateSpecialization; |
5083 | } |
5084 | }; |
5085 | |
5086 | /// Represents a type template specialization; the template |
5087 | /// must be a class template, a type alias template, or a template |
5088 | /// template parameter. A template which cannot be resolved to one of |
5089 | /// these, e.g. because it is written with a dependent scope |
5090 | /// specifier, is instead represented as a |
5091 | /// @c DependentTemplateSpecializationType. |
5092 | /// |
5093 | /// A non-dependent template specialization type is always "sugar", |
5094 | /// typically for a \c RecordType. For example, a class template |
5095 | /// specialization type of \c vector<int> will refer to a tag type for |
5096 | /// the instantiation \c std::vector<int, std::allocator<int>> |
5097 | /// |
5098 | /// Template specializations are dependent if either the template or |
5099 | /// any of the template arguments are dependent, in which case the |
5100 | /// type may also be canonical. |
5101 | /// |
5102 | /// Instances of this type are allocated with a trailing array of |
5103 | /// TemplateArguments, followed by a QualType representing the |
5104 | /// non-canonical aliased type when the template is a type alias |
5105 | /// template. |
5106 | class alignas(8) TemplateSpecializationType |
5107 | : public Type, |
5108 | public llvm::FoldingSetNode { |
5109 | friend class ASTContext; // ASTContext creates these |
5110 | |
5111 | /// The name of the template being specialized. This is |
5112 | /// either a TemplateName::Template (in which case it is a |
5113 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a |
5114 | /// TypeAliasTemplateDecl*), a |
5115 | /// TemplateName::SubstTemplateTemplateParmPack, or a |
5116 | /// TemplateName::SubstTemplateTemplateParm (in which case the |
5117 | /// replacement must, recursively, be one of these). |
5118 | TemplateName Template; |
5119 | |
5120 | TemplateSpecializationType(TemplateName T, |
5121 | ArrayRef<TemplateArgument> Args, |
5122 | QualType Canon, |
5123 | QualType Aliased); |
5124 | |
5125 | public: |
5126 | /// Determine whether any of the given template arguments are dependent. |
5127 | /// |
5128 | /// The converted arguments should be supplied when known; whether an |
5129 | /// argument is dependent can depend on the conversions performed on it |
5130 | /// (for example, a 'const int' passed as a template argument might be |
5131 | /// dependent if the parameter is a reference but non-dependent if the |
5132 | /// parameter is an int). |
5133 | /// |
5134 | /// Note that the \p Args parameter is unused: this is intentional, to remind |
5135 | /// the caller that they need to pass in the converted arguments, not the |
5136 | /// specified arguments. |
5137 | static bool |
5138 | anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, |
5139 | ArrayRef<TemplateArgument> Converted); |
5140 | static bool |
5141 | anyDependentTemplateArguments(const TemplateArgumentListInfo &, |
5142 | ArrayRef<TemplateArgument> Converted); |
5143 | static bool anyInstantiationDependentTemplateArguments( |
5144 | ArrayRef<TemplateArgumentLoc> Args); |
5145 | |
5146 | /// True if this template specialization type matches a current |
5147 | /// instantiation in the context in which it is found. |
5148 | bool isCurrentInstantiation() const { |
5149 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); |
5150 | } |
5151 | |
5152 | /// Determine if this template specialization type is for a type alias |
5153 | /// template that has been substituted. |
5154 | /// |
5155 | /// Nearly every template specialization type whose template is an alias |
5156 | /// template will be substituted. However, this is not the case when |
5157 | /// the specialization contains a pack expansion but the template alias |
5158 | /// does not have a corresponding parameter pack, e.g., |
5159 | /// |
5160 | /// \code |
5161 | /// template<typename T, typename U, typename V> struct S; |
5162 | /// template<typename T, typename U> using A = S<T, int, U>; |
5163 | /// template<typename... Ts> struct X { |
5164 | /// typedef A<Ts...> type; // not a type alias |
5165 | /// }; |
5166 | /// \endcode |
5167 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } |
5168 | |
5169 | /// Get the aliased type, if this is a specialization of a type alias |
5170 | /// template. |
5171 | QualType getAliasedType() const { |
5172 | assert(isTypeAlias() && "not a type alias template specialization")(static_cast <bool> (isTypeAlias() && "not a type alias template specialization" ) ? void (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5172, __extension__ __PRETTY_FUNCTION__)); |
5173 | return *reinterpret_cast<const QualType*>(end()); |
5174 | } |
5175 | |
5176 | using iterator = const TemplateArgument *; |
5177 | |
5178 | iterator begin() const { return getArgs(); } |
5179 | iterator end() const; // defined inline in TemplateBase.h |
5180 | |
5181 | /// Retrieve the name of the template that we are specializing. |
5182 | TemplateName getTemplateName() const { return Template; } |
5183 | |
5184 | /// Retrieve the template arguments. |
5185 | const TemplateArgument *getArgs() const { |
5186 | return reinterpret_cast<const TemplateArgument *>(this + 1); |
5187 | } |
5188 | |
5189 | /// Retrieve the number of template arguments. |
5190 | unsigned getNumArgs() const { |
5191 | return TemplateSpecializationTypeBits.NumArgs; |
5192 | } |
5193 | |
5194 | /// Retrieve a specific template argument as a type. |
5195 | /// \pre \c isArgType(Arg) |
5196 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5197 | |
5198 | ArrayRef<TemplateArgument> template_arguments() const { |
5199 | return {getArgs(), getNumArgs()}; |
5200 | } |
5201 | |
5202 | bool isSugared() const { |
5203 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); |
5204 | } |
5205 | |
5206 | QualType desugar() const { |
5207 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); |
5208 | } |
5209 | |
5210 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
5211 | Profile(ID, Template, template_arguments(), Ctx); |
5212 | if (isTypeAlias()) |
5213 | getAliasedType().Profile(ID); |
5214 | } |
5215 | |
5216 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, |
5217 | ArrayRef<TemplateArgument> Args, |
5218 | const ASTContext &Context); |
5219 | |
5220 | static bool classof(const Type *T) { |
5221 | return T->getTypeClass() == TemplateSpecialization; |
5222 | } |
5223 | }; |
5224 | |
5225 | /// Print a template argument list, including the '<' and '>' |
5226 | /// enclosing the template arguments. |
5227 | void printTemplateArgumentList(raw_ostream &OS, |
5228 | ArrayRef<TemplateArgument> Args, |
5229 | const PrintingPolicy &Policy, |
5230 | const TemplateParameterList *TPL = nullptr); |
5231 | |
5232 | void printTemplateArgumentList(raw_ostream &OS, |
5233 | ArrayRef<TemplateArgumentLoc> Args, |
5234 | const PrintingPolicy &Policy, |
5235 | const TemplateParameterList *TPL = nullptr); |
5236 | |
5237 | void printTemplateArgumentList(raw_ostream &OS, |
5238 | const TemplateArgumentListInfo &Args, |
5239 | const PrintingPolicy &Policy, |
5240 | const TemplateParameterList *TPL = nullptr); |
5241 | |
5242 | /// The injected class name of a C++ class template or class |
5243 | /// template partial specialization. Used to record that a type was |
5244 | /// spelled with a bare identifier rather than as a template-id; the |
5245 | /// equivalent for non-templated classes is just RecordType. |
5246 | /// |
5247 | /// Injected class name types are always dependent. Template |
5248 | /// instantiation turns these into RecordTypes. |
5249 | /// |
5250 | /// Injected class name types are always canonical. This works |
5251 | /// because it is impossible to compare an injected class name type |
5252 | /// with the corresponding non-injected template type, for the same |
5253 | /// reason that it is impossible to directly compare template |
5254 | /// parameters from different dependent contexts: injected class name |
5255 | /// types can only occur within the scope of a particular templated |
5256 | /// declaration, and within that scope every template specialization |
5257 | /// will canonicalize to the injected class name (when appropriate |
5258 | /// according to the rules of the language). |
5259 | class InjectedClassNameType : public Type { |
5260 | friend class ASTContext; // ASTContext creates these. |
5261 | friend class ASTNodeImporter; |
5262 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not |
5263 | // currently suitable for AST reading, too much |
5264 | // interdependencies. |
5265 | template <class T> friend class serialization::AbstractTypeReader; |
5266 | |
5267 | CXXRecordDecl *Decl; |
5268 | |
5269 | /// The template specialization which this type represents. |
5270 | /// For example, in |
5271 | /// template <class T> class A { ... }; |
5272 | /// this is A<T>, whereas in |
5273 | /// template <class X, class Y> class A<B<X,Y> > { ... }; |
5274 | /// this is A<B<X,Y> >. |
5275 | /// |
5276 | /// It is always unqualified, always a template specialization type, |
5277 | /// and always dependent. |
5278 | QualType InjectedType; |
5279 | |
5280 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) |
5281 | : Type(InjectedClassName, QualType(), |
5282 | TypeDependence::DependentInstantiation), |
5283 | Decl(D), InjectedType(TST) { |
5284 | assert(isa<TemplateSpecializationType>(TST))(static_cast <bool> (isa<TemplateSpecializationType> (TST)) ? void (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5284, __extension__ __PRETTY_FUNCTION__)); |
5285 | assert(!TST.hasQualifiers())(static_cast <bool> (!TST.hasQualifiers()) ? void (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5285, __extension__ __PRETTY_FUNCTION__)); |
5286 | assert(TST->isDependentType())(static_cast <bool> (TST->isDependentType()) ? void ( 0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5286, __extension__ __PRETTY_FUNCTION__)); |
5287 | } |
5288 | |
5289 | public: |
5290 | QualType getInjectedSpecializationType() const { return InjectedType; } |
5291 | |
5292 | const TemplateSpecializationType *getInjectedTST() const { |
5293 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); |
5294 | } |
5295 | |
5296 | TemplateName getTemplateName() const { |
5297 | return getInjectedTST()->getTemplateName(); |
5298 | } |
5299 | |
5300 | CXXRecordDecl *getDecl() const; |
5301 | |
5302 | bool isSugared() const { return false; } |
5303 | QualType desugar() const { return QualType(this, 0); } |
5304 | |
5305 | static bool classof(const Type *T) { |
5306 | return T->getTypeClass() == InjectedClassName; |
5307 | } |
5308 | }; |
5309 | |
5310 | /// The kind of a tag type. |
5311 | enum TagTypeKind { |
5312 | /// The "struct" keyword. |
5313 | TTK_Struct, |
5314 | |
5315 | /// The "__interface" keyword. |
5316 | TTK_Interface, |
5317 | |
5318 | /// The "union" keyword. |
5319 | TTK_Union, |
5320 | |
5321 | /// The "class" keyword. |
5322 | TTK_Class, |
5323 | |
5324 | /// The "enum" keyword. |
5325 | TTK_Enum |
5326 | }; |
5327 | |
5328 | /// The elaboration keyword that precedes a qualified type name or |
5329 | /// introduces an elaborated-type-specifier. |
5330 | enum ElaboratedTypeKeyword { |
5331 | /// The "struct" keyword introduces the elaborated-type-specifier. |
5332 | ETK_Struct, |
5333 | |
5334 | /// The "__interface" keyword introduces the elaborated-type-specifier. |
5335 | ETK_Interface, |
5336 | |
5337 | /// The "union" keyword introduces the elaborated-type-specifier. |
5338 | ETK_Union, |
5339 | |
5340 | /// The "class" keyword introduces the elaborated-type-specifier. |
5341 | ETK_Class, |
5342 | |
5343 | /// The "enum" keyword introduces the elaborated-type-specifier. |
5344 | ETK_Enum, |
5345 | |
5346 | /// The "typename" keyword precedes the qualified type name, e.g., |
5347 | /// \c typename T::type. |
5348 | ETK_Typename, |
5349 | |
5350 | /// No keyword precedes the qualified type name. |
5351 | ETK_None |
5352 | }; |
5353 | |
5354 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. |
5355 | /// The keyword in stored in the free bits of the base class. |
5356 | /// Also provides a few static helpers for converting and printing |
5357 | /// elaborated type keyword and tag type kind enumerations. |
5358 | class TypeWithKeyword : public Type { |
5359 | protected: |
5360 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, |
5361 | QualType Canonical, TypeDependence Dependence) |
5362 | : Type(tc, Canonical, Dependence) { |
5363 | TypeWithKeywordBits.Keyword = Keyword; |
5364 | } |
5365 | |
5366 | public: |
5367 | ElaboratedTypeKeyword getKeyword() const { |
5368 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); |
5369 | } |
5370 | |
5371 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. |
5372 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); |
5373 | |
5374 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. |
5375 | /// It is an error to provide a type specifier which *isn't* a tag kind here. |
5376 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); |
5377 | |
5378 | /// Converts a TagTypeKind into an elaborated type keyword. |
5379 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); |
5380 | |
5381 | /// Converts an elaborated type keyword into a TagTypeKind. |
5382 | /// It is an error to provide an elaborated type keyword |
5383 | /// which *isn't* a tag kind here. |
5384 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); |
5385 | |
5386 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); |
5387 | |
5388 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); |
5389 | |
5390 | static StringRef getTagTypeKindName(TagTypeKind Kind) { |
5391 | return getKeywordName(getKeywordForTagTypeKind(Kind)); |
5392 | } |
5393 | |
5394 | class CannotCastToThisType {}; |
5395 | static CannotCastToThisType classof(const Type *); |
5396 | }; |
5397 | |
5398 | /// Represents a type that was referred to using an elaborated type |
5399 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, |
5400 | /// or both. |
5401 | /// |
5402 | /// This type is used to keep track of a type name as written in the |
5403 | /// source code, including tag keywords and any nested-name-specifiers. |
5404 | /// The type itself is always "sugar", used to express what was written |
5405 | /// in the source code but containing no additional semantic information. |
5406 | class ElaboratedType final |
5407 | : public TypeWithKeyword, |
5408 | public llvm::FoldingSetNode, |
5409 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { |
5410 | friend class ASTContext; // ASTContext creates these |
5411 | friend TrailingObjects; |
5412 | |
5413 | /// The nested name specifier containing the qualifier. |
5414 | NestedNameSpecifier *NNS; |
5415 | |
5416 | /// The type that this qualified name refers to. |
5417 | QualType NamedType; |
5418 | |
5419 | /// The (re)declaration of this tag type owned by this occurrence is stored |
5420 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain |
5421 | /// it, or obtain a null pointer if there is none. |
5422 | |
5423 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5424 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) |
5425 | : TypeWithKeyword(Keyword, Elaborated, CanonType, |
5426 | // Any semantic dependence on the qualifier will have |
5427 | // been incorporated into NamedType. We still need to |
5428 | // track syntactic (instantiation / error / pack) |
5429 | // dependence on the qualifier. |
5430 | NamedType->getDependence() | |
5431 | (NNS ? toSyntacticDependence( |
5432 | toTypeDependence(NNS->getDependence())) |
5433 | : TypeDependence::None)), |
5434 | NNS(NNS), NamedType(NamedType) { |
5435 | ElaboratedTypeBits.HasOwnedTagDecl = false; |
5436 | if (OwnedTagDecl) { |
5437 | ElaboratedTypeBits.HasOwnedTagDecl = true; |
5438 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; |
5439 | } |
5440 | assert(!(Keyword == ETK_None && NNS == nullptr) &&(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)) |
5441 | "ElaboratedType cannot have elaborated type keyword "(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)) |
5442 | "and name qualifier both null.")(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)); |
5443 | } |
5444 | |
5445 | public: |
5446 | /// Retrieve the qualification on this type. |
5447 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5448 | |
5449 | /// Retrieve the type named by the qualified-id. |
5450 | QualType getNamedType() const { return NamedType; } |
5451 | |
5452 | /// Remove a single level of sugar. |
5453 | QualType desugar() const { return getNamedType(); } |
5454 | |
5455 | /// Returns whether this type directly provides sugar. |
5456 | bool isSugared() const { return true; } |
5457 | |
5458 | /// Return the (re)declaration of this type owned by this occurrence of this |
5459 | /// type, or nullptr if there is none. |
5460 | TagDecl *getOwnedTagDecl() const { |
5461 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() |
5462 | : nullptr; |
5463 | } |
5464 | |
5465 | void Profile(llvm::FoldingSetNodeID &ID) { |
5466 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); |
5467 | } |
5468 | |
5469 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5470 | NestedNameSpecifier *NNS, QualType NamedType, |
5471 | TagDecl *OwnedTagDecl) { |
5472 | ID.AddInteger(Keyword); |
5473 | ID.AddPointer(NNS); |
5474 | NamedType.Profile(ID); |
5475 | ID.AddPointer(OwnedTagDecl); |
5476 | } |
5477 | |
5478 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } |
5479 | }; |
5480 | |
5481 | /// Represents a qualified type name for which the type name is |
5482 | /// dependent. |
5483 | /// |
5484 | /// DependentNameType represents a class of dependent types that involve a |
5485 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a |
5486 | /// name of a type. The DependentNameType may start with a "typename" (for a |
5487 | /// typename-specifier), "class", "struct", "union", or "enum" (for a |
5488 | /// dependent elaborated-type-specifier), or nothing (in contexts where we |
5489 | /// know that we must be referring to a type, e.g., in a base class specifier). |
5490 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility |
5491 | /// mode, this type is used with non-dependent names to delay name lookup until |
5492 | /// instantiation. |
5493 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { |
5494 | friend class ASTContext; // ASTContext creates these |
5495 | |
5496 | /// The nested name specifier containing the qualifier. |
5497 | NestedNameSpecifier *NNS; |
5498 | |
5499 | /// The type that this typename specifier refers to. |
5500 | const IdentifierInfo *Name; |
5501 | |
5502 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5503 | const IdentifierInfo *Name, QualType CanonType) |
5504 | : TypeWithKeyword(Keyword, DependentName, CanonType, |
5505 | TypeDependence::DependentInstantiation | |
5506 | toTypeDependence(NNS->getDependence())), |
5507 | NNS(NNS), Name(Name) {} |
5508 | |
5509 | public: |
5510 | /// Retrieve the qualification on this type. |
5511 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5512 | |
5513 | /// Retrieve the type named by the typename specifier as an identifier. |
5514 | /// |
5515 | /// This routine will return a non-NULL identifier pointer when the |
5516 | /// form of the original typename was terminated by an identifier, |
5517 | /// e.g., "typename T::type". |
5518 | const IdentifierInfo *getIdentifier() const { |
5519 | return Name; |
5520 | } |
5521 | |
5522 | bool isSugared() const { return false; } |
5523 | QualType desugar() const { return QualType(this, 0); } |
5524 | |
5525 | void Profile(llvm::FoldingSetNodeID &ID) { |
5526 | Profile(ID, getKeyword(), NNS, Name); |
5527 | } |
5528 | |
5529 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5530 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { |
5531 | ID.AddInteger(Keyword); |
5532 | ID.AddPointer(NNS); |
5533 | ID.AddPointer(Name); |
5534 | } |
5535 | |
5536 | static bool classof(const Type *T) { |
5537 | return T->getTypeClass() == DependentName; |
5538 | } |
5539 | }; |
5540 | |
5541 | /// Represents a template specialization type whose template cannot be |
5542 | /// resolved, e.g. |
5543 | /// A<T>::template B<T> |
5544 | class alignas(8) DependentTemplateSpecializationType |
5545 | : public TypeWithKeyword, |
5546 | public llvm::FoldingSetNode { |
5547 | friend class ASTContext; // ASTContext creates these |
5548 | |
5549 | /// The nested name specifier containing the qualifier. |
5550 | NestedNameSpecifier *NNS; |
5551 | |
5552 | /// The identifier of the template. |
5553 | const IdentifierInfo *Name; |
5554 | |
5555 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, |
5556 | NestedNameSpecifier *NNS, |
5557 | const IdentifierInfo *Name, |
5558 | ArrayRef<TemplateArgument> Args, |
5559 | QualType Canon); |
5560 | |
5561 | const TemplateArgument *getArgBuffer() const { |
5562 | return reinterpret_cast<const TemplateArgument*>(this+1); |
5563 | } |
5564 | |
5565 | TemplateArgument *getArgBuffer() { |
5566 | return reinterpret_cast<TemplateArgument*>(this+1); |
5567 | } |
5568 | |
5569 | public: |
5570 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5571 | const IdentifierInfo *getIdentifier() const { return Name; } |
5572 | |
5573 | /// Retrieve the template arguments. |
5574 | const TemplateArgument *getArgs() const { |
5575 | return getArgBuffer(); |
5576 | } |
5577 | |
5578 | /// Retrieve the number of template arguments. |
5579 | unsigned getNumArgs() const { |
5580 | return DependentTemplateSpecializationTypeBits.NumArgs; |
5581 | } |
5582 | |
5583 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5584 | |
5585 | ArrayRef<TemplateArgument> template_arguments() const { |
5586 | return {getArgs(), getNumArgs()}; |
5587 | } |
5588 | |
5589 | using iterator = const TemplateArgument *; |
5590 | |
5591 | iterator begin() const { return getArgs(); } |
5592 | iterator end() const; // inline in TemplateBase.h |
5593 | |
5594 | bool isSugared() const { return false; } |
5595 | QualType desugar() const { return QualType(this, 0); } |
5596 | |
5597 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5598 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); |
5599 | } |
5600 | |
5601 | static void Profile(llvm::FoldingSetNodeID &ID, |
5602 | const ASTContext &Context, |
5603 | ElaboratedTypeKeyword Keyword, |
5604 | NestedNameSpecifier *Qualifier, |
5605 | const IdentifierInfo *Name, |
5606 | ArrayRef<TemplateArgument> Args); |
5607 | |
5608 | static bool classof(const Type *T) { |
5609 | return T->getTypeClass() == DependentTemplateSpecialization; |
5610 | } |
5611 | }; |
5612 | |
5613 | /// Represents a pack expansion of types. |
5614 | /// |
5615 | /// Pack expansions are part of C++11 variadic templates. A pack |
5616 | /// expansion contains a pattern, which itself contains one or more |
5617 | /// "unexpanded" parameter packs. When instantiated, a pack expansion |
5618 | /// produces a series of types, each instantiated from the pattern of |
5619 | /// the expansion, where the Ith instantiation of the pattern uses the |
5620 | /// Ith arguments bound to each of the unexpanded parameter packs. The |
5621 | /// pack expansion is considered to "expand" these unexpanded |
5622 | /// parameter packs. |
5623 | /// |
5624 | /// \code |
5625 | /// template<typename ...Types> struct tuple; |
5626 | /// |
5627 | /// template<typename ...Types> |
5628 | /// struct tuple_of_references { |
5629 | /// typedef tuple<Types&...> type; |
5630 | /// }; |
5631 | /// \endcode |
5632 | /// |
5633 | /// Here, the pack expansion \c Types&... is represented via a |
5634 | /// PackExpansionType whose pattern is Types&. |
5635 | class PackExpansionType : public Type, public llvm::FoldingSetNode { |
5636 | friend class ASTContext; // ASTContext creates these |
5637 | |
5638 | /// The pattern of the pack expansion. |
5639 | QualType Pattern; |
5640 | |
5641 | PackExpansionType(QualType Pattern, QualType Canon, |
5642 | Optional<unsigned> NumExpansions) |
5643 | : Type(PackExpansion, Canon, |
5644 | (Pattern->getDependence() | TypeDependence::Dependent | |
5645 | TypeDependence::Instantiation) & |
5646 | ~TypeDependence::UnexpandedPack), |
5647 | Pattern(Pattern) { |
5648 | PackExpansionTypeBits.NumExpansions = |
5649 | NumExpansions ? *NumExpansions + 1 : 0; |
5650 | } |
5651 | |
5652 | public: |
5653 | /// Retrieve the pattern of this pack expansion, which is the |
5654 | /// type that will be repeatedly instantiated when instantiating the |
5655 | /// pack expansion itself. |
5656 | QualType getPattern() const { return Pattern; } |
5657 | |
5658 | /// Retrieve the number of expansions that this pack expansion will |
5659 | /// generate, if known. |
5660 | Optional<unsigned> getNumExpansions() const { |
5661 | if (PackExpansionTypeBits.NumExpansions) |
5662 | return PackExpansionTypeBits.NumExpansions - 1; |
5663 | return None; |
5664 | } |
5665 | |
5666 | bool isSugared() const { return false; } |
5667 | QualType desugar() const { return QualType(this, 0); } |
5668 | |
5669 | void Profile(llvm::FoldingSetNodeID &ID) { |
5670 | Profile(ID, getPattern(), getNumExpansions()); |
5671 | } |
5672 | |
5673 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, |
5674 | Optional<unsigned> NumExpansions) { |
5675 | ID.AddPointer(Pattern.getAsOpaquePtr()); |
5676 | ID.AddBoolean(NumExpansions.hasValue()); |
5677 | if (NumExpansions) |
5678 | ID.AddInteger(*NumExpansions); |
5679 | } |
5680 | |
5681 | static bool classof(const Type *T) { |
5682 | return T->getTypeClass() == PackExpansion; |
5683 | } |
5684 | }; |
5685 | |
5686 | /// This class wraps the list of protocol qualifiers. For types that can |
5687 | /// take ObjC protocol qualifers, they can subclass this class. |
5688 | template <class T> |
5689 | class ObjCProtocolQualifiers { |
5690 | protected: |
5691 | ObjCProtocolQualifiers() = default; |
5692 | |
5693 | ObjCProtocolDecl * const *getProtocolStorage() const { |
5694 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); |
5695 | } |
5696 | |
5697 | ObjCProtocolDecl **getProtocolStorage() { |
5698 | return static_cast<T*>(this)->getProtocolStorageImpl(); |
5699 | } |
5700 | |
5701 | void setNumProtocols(unsigned N) { |
5702 | static_cast<T*>(this)->setNumProtocolsImpl(N); |
5703 | } |
5704 | |
5705 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { |
5706 | setNumProtocols(protocols.size()); |
5707 | assert(getNumProtocols() == protocols.size() &&(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5708, __extension__ __PRETTY_FUNCTION__)) |
5708 | "bitfield overflow in protocol count")(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5708, __extension__ __PRETTY_FUNCTION__)); |
5709 | if (!protocols.empty()) |
5710 | memcpy(getProtocolStorage(), protocols.data(), |
5711 | protocols.size() * sizeof(ObjCProtocolDecl*)); |
5712 | } |
5713 | |
5714 | public: |
5715 | using qual_iterator = ObjCProtocolDecl * const *; |
5716 | using qual_range = llvm::iterator_range<qual_iterator>; |
5717 | |
5718 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5719 | qual_iterator qual_begin() const { return getProtocolStorage(); } |
5720 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } |
5721 | |
5722 | bool qual_empty() const { return getNumProtocols() == 0; } |
5723 | |
5724 | /// Return the number of qualifying protocols in this type, or 0 if |
5725 | /// there are none. |
5726 | unsigned getNumProtocols() const { |
5727 | return static_cast<const T*>(this)->getNumProtocolsImpl(); |
5728 | } |
5729 | |
5730 | /// Fetch a protocol by index. |
5731 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
5732 | assert(I < getNumProtocols() && "Out-of-range protocol access")(static_cast <bool> (I < getNumProtocols() && "Out-of-range protocol access") ? void (0) : __assert_fail ( "I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5732, __extension__ __PRETTY_FUNCTION__)); |
5733 | return qual_begin()[I]; |
5734 | } |
5735 | |
5736 | /// Retrieve all of the protocol qualifiers. |
5737 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { |
5738 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); |
5739 | } |
5740 | }; |
5741 | |
5742 | /// Represents a type parameter type in Objective C. It can take |
5743 | /// a list of protocols. |
5744 | class ObjCTypeParamType : public Type, |
5745 | public ObjCProtocolQualifiers<ObjCTypeParamType>, |
5746 | public llvm::FoldingSetNode { |
5747 | friend class ASTContext; |
5748 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; |
5749 | |
5750 | /// The number of protocols stored on this type. |
5751 | unsigned NumProtocols : 6; |
5752 | |
5753 | ObjCTypeParamDecl *OTPDecl; |
5754 | |
5755 | /// The protocols are stored after the ObjCTypeParamType node. In the |
5756 | /// canonical type, the list of protocols are sorted alphabetically |
5757 | /// and uniqued. |
5758 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5759 | |
5760 | /// Return the number of qualifying protocols in this interface type, |
5761 | /// or 0 if there are none. |
5762 | unsigned getNumProtocolsImpl() const { |
5763 | return NumProtocols; |
5764 | } |
5765 | |
5766 | void setNumProtocolsImpl(unsigned N) { |
5767 | NumProtocols = N; |
5768 | } |
5769 | |
5770 | ObjCTypeParamType(const ObjCTypeParamDecl *D, |
5771 | QualType can, |
5772 | ArrayRef<ObjCProtocolDecl *> protocols); |
5773 | |
5774 | public: |
5775 | bool isSugared() const { return true; } |
5776 | QualType desugar() const { return getCanonicalTypeInternal(); } |
5777 | |
5778 | static bool classof(const Type *T) { |
5779 | return T->getTypeClass() == ObjCTypeParam; |
5780 | } |
5781 | |
5782 | void Profile(llvm::FoldingSetNodeID &ID); |
5783 | static void Profile(llvm::FoldingSetNodeID &ID, |
5784 | const ObjCTypeParamDecl *OTPDecl, |
5785 | QualType CanonicalType, |
5786 | ArrayRef<ObjCProtocolDecl *> protocols); |
5787 | |
5788 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } |
5789 | }; |
5790 | |
5791 | /// Represents a class type in Objective C. |
5792 | /// |
5793 | /// Every Objective C type is a combination of a base type, a set of |
5794 | /// type arguments (optional, for parameterized classes) and a list of |
5795 | /// protocols. |
5796 | /// |
5797 | /// Given the following declarations: |
5798 | /// \code |
5799 | /// \@class C<T>; |
5800 | /// \@protocol P; |
5801 | /// \endcode |
5802 | /// |
5803 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType |
5804 | /// with base C and no protocols. |
5805 | /// |
5806 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. |
5807 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no |
5808 | /// protocol list. |
5809 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', |
5810 | /// and protocol list [P]. |
5811 | /// |
5812 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose |
5813 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType |
5814 | /// and no protocols. |
5815 | /// |
5816 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType |
5817 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually |
5818 | /// this should get its own sugar class to better represent the source. |
5819 | class ObjCObjectType : public Type, |
5820 | public ObjCProtocolQualifiers<ObjCObjectType> { |
5821 | friend class ObjCProtocolQualifiers<ObjCObjectType>; |
5822 | |
5823 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored |
5824 | // after the ObjCObjectPointerType node. |
5825 | // ObjCObjectType.NumProtocols - the number of protocols stored |
5826 | // after the type arguments of ObjCObjectPointerType node. |
5827 | // |
5828 | // These protocols are those written directly on the type. If |
5829 | // protocol qualifiers ever become additive, the iterators will need |
5830 | // to get kindof complicated. |
5831 | // |
5832 | // In the canonical object type, these are sorted alphabetically |
5833 | // and uniqued. |
5834 | |
5835 | /// Either a BuiltinType or an InterfaceType or sugar for either. |
5836 | QualType BaseType; |
5837 | |
5838 | /// Cached superclass type. |
5839 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> |
5840 | CachedSuperClassType; |
5841 | |
5842 | QualType *getTypeArgStorage(); |
5843 | const QualType *getTypeArgStorage() const { |
5844 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); |
5845 | } |
5846 | |
5847 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5848 | /// Return the number of qualifying protocols in this interface type, |
5849 | /// or 0 if there are none. |
5850 | unsigned getNumProtocolsImpl() const { |
5851 | return ObjCObjectTypeBits.NumProtocols; |
5852 | } |
5853 | void setNumProtocolsImpl(unsigned N) { |
5854 | ObjCObjectTypeBits.NumProtocols = N; |
5855 | } |
5856 | |
5857 | protected: |
5858 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; |
5859 | |
5860 | ObjCObjectType(QualType Canonical, QualType Base, |
5861 | ArrayRef<QualType> typeArgs, |
5862 | ArrayRef<ObjCProtocolDecl *> protocols, |
5863 | bool isKindOf); |
5864 | |
5865 | ObjCObjectType(enum Nonce_ObjCInterface) |
5866 | : Type(ObjCInterface, QualType(), TypeDependence::None), |
5867 | BaseType(QualType(this_(), 0)) { |
5868 | ObjCObjectTypeBits.NumProtocols = 0; |
5869 | ObjCObjectTypeBits.NumTypeArgs = 0; |
5870 | ObjCObjectTypeBits.IsKindOf = 0; |
5871 | } |
5872 | |
5873 | void computeSuperClassTypeSlow() const; |
5874 | |
5875 | public: |
5876 | /// Gets the base type of this object type. This is always (possibly |
5877 | /// sugar for) one of: |
5878 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the |
5879 | /// user, which is a typedef for an ObjCObjectPointerType) |
5880 | /// - the 'Class' builtin type (same caveat) |
5881 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) |
5882 | QualType getBaseType() const { return BaseType; } |
5883 | |
5884 | bool isObjCId() const { |
5885 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); |
5886 | } |
5887 | |
5888 | bool isObjCClass() const { |
5889 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); |
5890 | } |
5891 | |
5892 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } |
5893 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } |
5894 | bool isObjCUnqualifiedIdOrClass() const { |
5895 | if (!qual_empty()) return false; |
5896 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) |
5897 | return T->getKind() == BuiltinType::ObjCId || |
5898 | T->getKind() == BuiltinType::ObjCClass; |
5899 | return false; |
5900 | } |
5901 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } |
5902 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } |
5903 | |
5904 | /// Gets the interface declaration for this object type, if the base type |
5905 | /// really is an interface. |
5906 | ObjCInterfaceDecl *getInterface() const; |
5907 | |
5908 | /// Determine whether this object type is "specialized", meaning |
5909 | /// that it has type arguments. |
5910 | bool isSpecialized() const; |
5911 | |
5912 | /// Determine whether this object type was written with type arguments. |
5913 | bool isSpecializedAsWritten() const { |
5914 | return ObjCObjectTypeBits.NumTypeArgs > 0; |
5915 | } |
5916 | |
5917 | /// Determine whether this object type is "unspecialized", meaning |
5918 | /// that it has no type arguments. |
5919 | bool isUnspecialized() const { return !isSpecialized(); } |
5920 | |
5921 | /// Determine whether this object type is "unspecialized" as |
5922 | /// written, meaning that it has no type arguments. |
5923 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5924 | |
5925 | /// Retrieve the type arguments of this object type (semantically). |
5926 | ArrayRef<QualType> getTypeArgs() const; |
5927 | |
5928 | /// Retrieve the type arguments of this object type as they were |
5929 | /// written. |
5930 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5931 | return llvm::makeArrayRef(getTypeArgStorage(), |
5932 | ObjCObjectTypeBits.NumTypeArgs); |
5933 | } |
5934 | |
5935 | /// Whether this is a "__kindof" type as written. |
5936 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } |
5937 | |
5938 | /// Whether this ia a "__kindof" type (semantically). |
5939 | bool isKindOfType() const; |
5940 | |
5941 | /// Retrieve the type of the superclass of this object type. |
5942 | /// |
5943 | /// This operation substitutes any type arguments into the |
5944 | /// superclass of the current class type, potentially producing a |
5945 | /// specialization of the superclass type. Produces a null type if |
5946 | /// there is no superclass. |
5947 | QualType getSuperClassType() const { |
5948 | if (!CachedSuperClassType.getInt()) |
5949 | computeSuperClassTypeSlow(); |
5950 | |
5951 | assert(CachedSuperClassType.getInt() && "Superclass not set?")(static_cast <bool> (CachedSuperClassType.getInt() && "Superclass not set?") ? void (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5951, __extension__ __PRETTY_FUNCTION__)); |
5952 | return QualType(CachedSuperClassType.getPointer(), 0); |
5953 | } |
5954 | |
5955 | /// Strip off the Objective-C "kindof" type and (with it) any |
5956 | /// protocol qualifiers. |
5957 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; |
5958 | |
5959 | bool isSugared() const { return false; } |
5960 | QualType desugar() const { return QualType(this, 0); } |
5961 | |
5962 | static bool classof(const Type *T) { |
5963 | return T->getTypeClass() == ObjCObject || |
5964 | T->getTypeClass() == ObjCInterface; |
5965 | } |
5966 | }; |
5967 | |
5968 | /// A class providing a concrete implementation |
5969 | /// of ObjCObjectType, so as to not increase the footprint of |
5970 | /// ObjCInterfaceType. Code outside of ASTContext and the core type |
5971 | /// system should not reference this type. |
5972 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { |
5973 | friend class ASTContext; |
5974 | |
5975 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() |
5976 | // will need to be modified. |
5977 | |
5978 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, |
5979 | ArrayRef<QualType> typeArgs, |
5980 | ArrayRef<ObjCProtocolDecl *> protocols, |
5981 | bool isKindOf) |
5982 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} |
5983 | |
5984 | public: |
5985 | void Profile(llvm::FoldingSetNodeID &ID); |
5986 | static void Profile(llvm::FoldingSetNodeID &ID, |
5987 | QualType Base, |
5988 | ArrayRef<QualType> typeArgs, |
5989 | ArrayRef<ObjCProtocolDecl *> protocols, |
5990 | bool isKindOf); |
5991 | }; |
5992 | |
5993 | inline QualType *ObjCObjectType::getTypeArgStorage() { |
5994 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); |
5995 | } |
5996 | |
5997 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { |
5998 | return reinterpret_cast<ObjCProtocolDecl**>( |
5999 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); |
6000 | } |
6001 | |
6002 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { |
6003 | return reinterpret_cast<ObjCProtocolDecl**>( |
6004 | static_cast<ObjCTypeParamType*>(this)+1); |
6005 | } |
6006 | |
6007 | /// Interfaces are the core concept in Objective-C for object oriented design. |
6008 | /// They basically correspond to C++ classes. There are two kinds of interface |
6009 | /// types: normal interfaces like `NSString`, and qualified interfaces, which |
6010 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. |
6011 | /// |
6012 | /// ObjCInterfaceType guarantees the following properties when considered |
6013 | /// as a subtype of its superclass, ObjCObjectType: |
6014 | /// - There are no protocol qualifiers. To reinforce this, code which |
6015 | /// tries to invoke the protocol methods via an ObjCInterfaceType will |
6016 | /// fail to compile. |
6017 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, |
6018 | /// T->getBaseType() == QualType(T, 0). |
6019 | class ObjCInterfaceType : public ObjCObjectType { |
6020 | friend class ASTContext; // ASTContext creates these. |
6021 | friend class ASTReader; |
6022 | friend class ObjCInterfaceDecl; |
6023 | template <class T> friend class serialization::AbstractTypeReader; |
6024 | |
6025 | mutable ObjCInterfaceDecl *Decl; |
6026 | |
6027 | ObjCInterfaceType(const ObjCInterfaceDecl *D) |
6028 | : ObjCObjectType(Nonce_ObjCInterface), |
6029 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} |
6030 | |
6031 | public: |
6032 | /// Get the declaration of this interface. |
6033 | ObjCInterfaceDecl *getDecl() const { return Decl; } |
6034 | |
6035 | bool isSugared() const { return false; } |
6036 | QualType desugar() const { return QualType(this, 0); } |
6037 | |
6038 | static bool classof(const Type *T) { |
6039 | return T->getTypeClass() == ObjCInterface; |
6040 | } |
6041 | |
6042 | // Nonsense to "hide" certain members of ObjCObjectType within this |
6043 | // class. People asking for protocols on an ObjCInterfaceType are |
6044 | // not going to get what they want: ObjCInterfaceTypes are |
6045 | // guaranteed to have no protocols. |
6046 | enum { |
6047 | qual_iterator, |
6048 | qual_begin, |
6049 | qual_end, |
6050 | getNumProtocols, |
6051 | getProtocol |
6052 | }; |
6053 | }; |
6054 | |
6055 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { |
6056 | QualType baseType = getBaseType(); |
6057 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { |
6058 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) |
6059 | return T->getDecl(); |
6060 | |
6061 | baseType = ObjT->getBaseType(); |
6062 | } |
6063 | |
6064 | return nullptr; |
6065 | } |
6066 | |
6067 | /// Represents a pointer to an Objective C object. |
6068 | /// |
6069 | /// These are constructed from pointer declarators when the pointee type is |
6070 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' |
6071 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' |
6072 | /// and 'Class<P>' are translated into these. |
6073 | /// |
6074 | /// Pointers to pointers to Objective C objects are still PointerTypes; |
6075 | /// only the first level of pointer gets it own type implementation. |
6076 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { |
6077 | friend class ASTContext; // ASTContext creates these. |
6078 | |
6079 | QualType PointeeType; |
6080 | |
6081 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) |
6082 | : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()), |
6083 | PointeeType(Pointee) {} |
6084 | |
6085 | public: |
6086 | /// Gets the type pointed to by this ObjC pointer. |
6087 | /// The result will always be an ObjCObjectType or sugar thereof. |
6088 | QualType getPointeeType() const { return PointeeType; } |
6089 | |
6090 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. |
6091 | /// |
6092 | /// This method is equivalent to getPointeeType() except that |
6093 | /// it discards any typedefs (or other sugar) between this |
6094 | /// type and the "outermost" object type. So for: |
6095 | /// \code |
6096 | /// \@class A; \@protocol P; \@protocol Q; |
6097 | /// typedef A<P> AP; |
6098 | /// typedef A A1; |
6099 | /// typedef A1<P> A1P; |
6100 | /// typedef A1P<Q> A1PQ; |
6101 | /// \endcode |
6102 | /// For 'A*', getObjectType() will return 'A'. |
6103 | /// For 'A<P>*', getObjectType() will return 'A<P>'. |
6104 | /// For 'AP*', getObjectType() will return 'A<P>'. |
6105 | /// For 'A1*', getObjectType() will return 'A'. |
6106 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. |
6107 | /// For 'A1P*', getObjectType() will return 'A1<P>'. |
6108 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because |
6109 | /// adding protocols to a protocol-qualified base discards the |
6110 | /// old qualifiers (for now). But if it didn't, getObjectType() |
6111 | /// would return 'A1P<Q>' (and we'd have to make iterating over |
6112 | /// qualifiers more complicated). |
6113 | const ObjCObjectType *getObjectType() const { |
6114 | return PointeeType->castAs<ObjCObjectType>(); |
6115 | } |
6116 | |
6117 | /// If this pointer points to an Objective C |
6118 | /// \@interface type, gets the type for that interface. Any protocol |
6119 | /// qualifiers on the interface are ignored. |
6120 | /// |
6121 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6122 | const ObjCInterfaceType *getInterfaceType() const; |
6123 | |
6124 | /// If this pointer points to an Objective \@interface |
6125 | /// type, gets the declaration for that interface. |
6126 | /// |
6127 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6128 | ObjCInterfaceDecl *getInterfaceDecl() const { |
6129 | return getObjectType()->getInterface(); |
6130 | } |
6131 | |
6132 | /// True if this is equivalent to the 'id' type, i.e. if |
6133 | /// its object type is the primitive 'id' type with no protocols. |
6134 | bool isObjCIdType() const { |
6135 | return getObjectType()->isObjCUnqualifiedId(); |
6136 | } |
6137 | |
6138 | /// True if this is equivalent to the 'Class' type, |
6139 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. |
6140 | bool isObjCClassType() const { |
6141 | return getObjectType()->isObjCUnqualifiedClass(); |
6142 | } |
6143 | |
6144 | /// True if this is equivalent to the 'id' or 'Class' type, |
6145 | bool isObjCIdOrClassType() const { |
6146 | return getObjectType()->isObjCUnqualifiedIdOrClass(); |
6147 | } |
6148 | |
6149 | /// True if this is equivalent to 'id<P>' for some non-empty set of |
6150 | /// protocols. |
6151 | bool isObjCQualifiedIdType() const { |
6152 | return getObjectType()->isObjCQualifiedId(); |
6153 | } |
6154 | |
6155 | /// True if this is equivalent to 'Class<P>' for some non-empty set of |
6156 | /// protocols. |
6157 | bool isObjCQualifiedClassType() const { |
6158 | return getObjectType()->isObjCQualifiedClass(); |
6159 | } |
6160 | |
6161 | /// Whether this is a "__kindof" type. |
6162 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } |
6163 | |
6164 | /// Whether this type is specialized, meaning that it has type arguments. |
6165 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } |
6166 | |
6167 | /// Whether this type is specialized, meaning that it has type arguments. |
6168 | bool isSpecializedAsWritten() const { |
6169 | return getObjectType()->isSpecializedAsWritten(); |
6170 | } |
6171 | |
6172 | /// Whether this type is unspecialized, meaning that is has no type arguments. |
6173 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } |
6174 | |
6175 | /// Determine whether this object type is "unspecialized" as |
6176 | /// written, meaning that it has no type arguments. |
6177 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
6178 | |
6179 | /// Retrieve the type arguments for this type. |
6180 | ArrayRef<QualType> getTypeArgs() const { |
6181 | return getObjectType()->getTypeArgs(); |
6182 | } |
6183 | |
6184 | /// Retrieve the type arguments for this type. |
6185 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
6186 | return getObjectType()->getTypeArgsAsWritten(); |
6187 | } |
6188 | |
6189 | /// An iterator over the qualifiers on the object type. Provided |
6190 | /// for convenience. This will always iterate over the full set of |
6191 | /// protocols on a type, not just those provided directly. |
6192 | using qual_iterator = ObjCObjectType::qual_iterator; |
6193 | using qual_range = llvm::iterator_range<qual_iterator>; |
6194 | |
6195 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
6196 | |
6197 | qual_iterator qual_begin() const { |
6198 | return getObjectType()->qual_begin(); |
6199 | } |
6200 | |
6201 | qual_iterator qual_end() const { |
6202 | return getObjectType()->qual_end(); |
6203 | } |
6204 | |
6205 | bool qual_empty() const { return getObjectType()->qual_empty(); } |
6206 | |
6207 | /// Return the number of qualifying protocols on the object type. |
6208 | unsigned getNumProtocols() const { |
6209 | return getObjectType()->getNumProtocols(); |
6210 | } |
6211 | |
6212 | /// Retrieve a qualifying protocol by index on the object type. |
6213 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
6214 | return getObjectType()->getProtocol(I); |
6215 | } |
6216 | |
6217 | bool isSugared() const { return false; } |
6218 | QualType desugar() const { return QualType(this, 0); } |
6219 | |
6220 | /// Retrieve the type of the superclass of this object pointer type. |
6221 | /// |
6222 | /// This operation substitutes any type arguments into the |
6223 | /// superclass of the current class type, potentially producing a |
6224 | /// pointer to a specialization of the superclass type. Produces a |
6225 | /// null type if there is no superclass. |
6226 | QualType getSuperClassType() const; |
6227 | |
6228 | /// Strip off the Objective-C "kindof" type and (with it) any |
6229 | /// protocol qualifiers. |
6230 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( |
6231 | const ASTContext &ctx) const; |
6232 | |
6233 | void Profile(llvm::FoldingSetNodeID &ID) { |
6234 | Profile(ID, getPointeeType()); |
6235 | } |
6236 | |
6237 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6238 | ID.AddPointer(T.getAsOpaquePtr()); |
6239 | } |
6240 | |
6241 | static bool classof(const Type *T) { |
6242 | return T->getTypeClass() == ObjCObjectPointer; |
6243 | } |
6244 | }; |
6245 | |
6246 | class AtomicType : public Type, public llvm::FoldingSetNode { |
6247 | friend class ASTContext; // ASTContext creates these. |
6248 | |
6249 | QualType ValueType; |
6250 | |
6251 | AtomicType(QualType ValTy, QualType Canonical) |
6252 | : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {} |
6253 | |
6254 | public: |
6255 | /// Gets the type contained by this atomic type, i.e. |
6256 | /// the type returned by performing an atomic load of this atomic type. |
6257 | QualType getValueType() const { return ValueType; } |
6258 | |
6259 | bool isSugared() const { return false; } |
6260 | QualType desugar() const { return QualType(this, 0); } |
6261 | |
6262 | void Profile(llvm::FoldingSetNodeID &ID) { |
6263 | Profile(ID, getValueType()); |
6264 | } |
6265 | |
6266 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6267 | ID.AddPointer(T.getAsOpaquePtr()); |
6268 | } |
6269 | |
6270 | static bool classof(const Type *T) { |
6271 | return T->getTypeClass() == Atomic; |
6272 | } |
6273 | }; |
6274 | |
6275 | /// PipeType - OpenCL20. |
6276 | class PipeType : public Type, public llvm::FoldingSetNode { |
6277 | friend class ASTContext; // ASTContext creates these. |
6278 | |
6279 | QualType ElementType; |
6280 | bool isRead; |
6281 | |
6282 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) |
6283 | : Type(Pipe, CanonicalPtr, elemType->getDependence()), |
6284 | ElementType(elemType), isRead(isRead) {} |
6285 | |
6286 | public: |
6287 | QualType getElementType() const { return ElementType; } |
6288 | |
6289 | bool isSugared() const { return false; } |
6290 | |
6291 | QualType desugar() const { return QualType(this, 0); } |
6292 | |
6293 | void Profile(llvm::FoldingSetNodeID &ID) { |
6294 | Profile(ID, getElementType(), isReadOnly()); |
6295 | } |
6296 | |
6297 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { |
6298 | ID.AddPointer(T.getAsOpaquePtr()); |
6299 | ID.AddBoolean(isRead); |
6300 | } |
6301 | |
6302 | static bool classof(const Type *T) { |
6303 | return T->getTypeClass() == Pipe; |
6304 | } |
6305 | |
6306 | bool isReadOnly() const { return isRead; } |
6307 | }; |
6308 | |
6309 | /// A fixed int type of a specified bitwidth. |
6310 | class ExtIntType final : public Type, public llvm::FoldingSetNode { |
6311 | friend class ASTContext; |
6312 | unsigned IsUnsigned : 1; |
6313 | unsigned NumBits : 24; |
6314 | |
6315 | protected: |
6316 | ExtIntType(bool isUnsigned, unsigned NumBits); |
6317 | |
6318 | public: |
6319 | bool isUnsigned() const { return IsUnsigned; } |
6320 | bool isSigned() const { return !IsUnsigned; } |
6321 | unsigned getNumBits() const { return NumBits; } |
6322 | |
6323 | bool isSugared() const { return false; } |
6324 | QualType desugar() const { return QualType(this, 0); } |
6325 | |
6326 | void Profile(llvm::FoldingSetNodeID &ID) { |
6327 | Profile(ID, isUnsigned(), getNumBits()); |
6328 | } |
6329 | |
6330 | static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned, |
6331 | unsigned NumBits) { |
6332 | ID.AddBoolean(IsUnsigned); |
6333 | ID.AddInteger(NumBits); |
6334 | } |
6335 | |
6336 | static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; } |
6337 | }; |
6338 | |
6339 | class DependentExtIntType final : public Type, public llvm::FoldingSetNode { |
6340 | friend class ASTContext; |
6341 | const ASTContext &Context; |
6342 | llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned; |
6343 | |
6344 | protected: |
6345 | DependentExtIntType(const ASTContext &Context, bool IsUnsigned, |
6346 | Expr *NumBits); |
6347 | |
6348 | public: |
6349 | bool isUnsigned() const; |
6350 | bool isSigned() const { return !isUnsigned(); } |
6351 | Expr *getNumBitsExpr() const; |
6352 | |
6353 | bool isSugared() const { return false; } |
6354 | QualType desugar() const { return QualType(this, 0); } |
6355 | |
6356 | void Profile(llvm::FoldingSetNodeID &ID) { |
6357 | Profile(ID, Context, isUnsigned(), getNumBitsExpr()); |
6358 | } |
6359 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
6360 | bool IsUnsigned, Expr *NumBitsExpr); |
6361 | |
6362 | static bool classof(const Type *T) { |
6363 | return T->getTypeClass() == DependentExtInt; |
6364 | } |
6365 | }; |
6366 | |
6367 | /// A qualifier set is used to build a set of qualifiers. |
6368 | class QualifierCollector : public Qualifiers { |
6369 | public: |
6370 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} |
6371 | |
6372 | /// Collect any qualifiers on the given type and return an |
6373 | /// unqualified type. The qualifiers are assumed to be consistent |
6374 | /// with those already in the type. |
6375 | const Type *strip(QualType type) { |
6376 | addFastQualifiers(type.getLocalFastQualifiers()); |
6377 | if (!type.hasLocalNonFastQualifiers()) |
6378 | return type.getTypePtrUnsafe(); |
6379 | |
6380 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); |
6381 | addConsistentQualifiers(extQuals->getQualifiers()); |
6382 | return extQuals->getBaseType(); |
6383 | } |
6384 | |
6385 | /// Apply the collected qualifiers to the given type. |
6386 | QualType apply(const ASTContext &Context, QualType QT) const; |
6387 | |
6388 | /// Apply the collected qualifiers to the given type. |
6389 | QualType apply(const ASTContext &Context, const Type* T) const; |
6390 | }; |
6391 | |
6392 | /// A container of type source information. |
6393 | /// |
6394 | /// A client can read the relevant info using TypeLoc wrappers, e.g: |
6395 | /// @code |
6396 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); |
6397 | /// TL.getBeginLoc().print(OS, SrcMgr); |
6398 | /// @endcode |
6399 | class alignas(8) TypeSourceInfo { |
6400 | // Contains a memory block after the class, used for type source information, |
6401 | // allocated by ASTContext. |
6402 | friend class ASTContext; |
6403 | |
6404 | QualType Ty; |
6405 | |
6406 | TypeSourceInfo(QualType ty) : Ty(ty) {} |
6407 | |
6408 | public: |
6409 | /// Return the type wrapped by this type source info. |
6410 | QualType getType() const { return Ty; } |
6411 | |
6412 | /// Return the TypeLoc wrapper for the type source info. |
6413 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h |
6414 | |
6415 | /// Override the type stored in this TypeSourceInfo. Use with caution! |
6416 | void overrideType(QualType T) { Ty = T; } |
6417 | }; |
6418 | |
6419 | // Inline function definitions. |
6420 | |
6421 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { |
6422 | SplitQualType desugar = |
6423 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); |
6424 | desugar.Quals.addConsistentQualifiers(Quals); |
6425 | return desugar; |
6426 | } |
6427 | |
6428 | inline const Type *QualType::getTypePtr() const { |
6429 | return getCommonPtr()->BaseType; |
6430 | } |
6431 | |
6432 | inline const Type *QualType::getTypePtrOrNull() const { |
6433 | return (isNull() ? nullptr : getCommonPtr()->BaseType); |
6434 | } |
6435 | |
6436 | inline SplitQualType QualType::split() const { |
6437 | if (!hasLocalNonFastQualifiers()) |
6438 | return SplitQualType(getTypePtrUnsafe(), |
6439 | Qualifiers::fromFastMask(getLocalFastQualifiers())); |
6440 | |
6441 | const ExtQuals *eq = getExtQualsUnsafe(); |
6442 | Qualifiers qs = eq->getQualifiers(); |
6443 | qs.addFastQualifiers(getLocalFastQualifiers()); |
6444 | return SplitQualType(eq->getBaseType(), qs); |
6445 | } |
6446 | |
6447 | inline Qualifiers QualType::getLocalQualifiers() const { |
6448 | Qualifiers Quals; |
6449 | if (hasLocalNonFastQualifiers()) |
6450 | Quals = getExtQualsUnsafe()->getQualifiers(); |
6451 | Quals.addFastQualifiers(getLocalFastQualifiers()); |
6452 | return Quals; |
6453 | } |
6454 | |
6455 | inline Qualifiers QualType::getQualifiers() const { |
6456 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); |
6457 | quals.addFastQualifiers(getLocalFastQualifiers()); |
6458 | return quals; |
6459 | } |
6460 | |
6461 | inline unsigned QualType::getCVRQualifiers() const { |
6462 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); |
6463 | cvr |= getLocalCVRQualifiers(); |
6464 | return cvr; |
6465 | } |
6466 | |
6467 | inline QualType QualType::getCanonicalType() const { |
6468 | QualType canon = getCommonPtr()->CanonicalType; |
6469 | return canon.withFastQualifiers(getLocalFastQualifiers()); |
6470 | } |
6471 | |
6472 | inline bool QualType::isCanonical() const { |
6473 | return getTypePtr()->isCanonicalUnqualified(); |
6474 | } |
6475 | |
6476 | inline bool QualType::isCanonicalAsParam() const { |
6477 | if (!isCanonical()) return false; |
6478 | if (hasLocalQualifiers()) return false; |
6479 | |
6480 | const Type *T = getTypePtr(); |
6481 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) |
6482 | return false; |
6483 | |
6484 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); |
6485 | } |
6486 | |
6487 | inline bool QualType::isConstQualified() const { |
6488 | return isLocalConstQualified() || |
6489 | getCommonPtr()->CanonicalType.isLocalConstQualified(); |
6490 | } |
6491 | |
6492 | inline bool QualType::isRestrictQualified() const { |
6493 | return isLocalRestrictQualified() || |
6494 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); |
6495 | } |
6496 | |
6497 | |
6498 | inline bool QualType::isVolatileQualified() const { |
6499 | return isLocalVolatileQualified() || |
6500 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); |
6501 | } |
6502 | |
6503 | inline bool QualType::hasQualifiers() const { |
6504 | return hasLocalQualifiers() || |
6505 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); |
6506 | } |
6507 | |
6508 | inline QualType QualType::getUnqualifiedType() const { |
6509 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6510 | return QualType(getTypePtr(), 0); |
6511 | |
6512 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); |
6513 | } |
6514 | |
6515 | inline SplitQualType QualType::getSplitUnqualifiedType() const { |
6516 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6517 | return split(); |
6518 | |
6519 | return getSplitUnqualifiedTypeImpl(*this); |
6520 | } |
6521 | |
6522 | inline void QualType::removeLocalConst() { |
6523 | removeLocalFastQualifiers(Qualifiers::Const); |
6524 | } |
6525 | |
6526 | inline void QualType::removeLocalRestrict() { |
6527 | removeLocalFastQualifiers(Qualifiers::Restrict); |
6528 | } |
6529 | |
6530 | inline void QualType::removeLocalVolatile() { |
6531 | removeLocalFastQualifiers(Qualifiers::Volatile); |
6532 | } |
6533 | |
6534 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { |
6535 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")(static_cast <bool> (!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 6535, __extension__ __PRETTY_FUNCTION__)); |
6536 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, |
6537 | "Fast bits differ from CVR bits!"); |
6538 | |
6539 | // Fast path: we don't need to touch the slow qualifiers. |
6540 | removeLocalFastQualifiers(Mask); |
6541 | } |
6542 | |
6543 | /// Check if this type has any address space qualifier. |
6544 | inline bool QualType::hasAddressSpace() const { |
6545 | return getQualifiers().hasAddressSpace(); |
6546 | } |
6547 | |
6548 | /// Return the address space of this type. |
6549 | inline LangAS QualType::getAddressSpace() const { |
6550 | return getQualifiers().getAddressSpace(); |
6551 | } |
6552 | |
6553 | /// Return the gc attribute of this type. |
6554 | inline Qualifiers::GC QualType::getObjCGCAttr() const { |
6555 | return getQualifiers().getObjCGCAttr(); |
6556 | } |
6557 | |
6558 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
6559 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6560 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); |
6561 | return false; |
6562 | } |
6563 | |
6564 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { |
6565 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6566 | return hasNonTrivialToPrimitiveDestructCUnion(RD); |
6567 | return false; |
6568 | } |
6569 | |
6570 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { |
6571 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6572 | return hasNonTrivialToPrimitiveCopyCUnion(RD); |
6573 | return false; |
6574 | } |
6575 | |
6576 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { |
6577 | if (const auto *PT = t.getAs<PointerType>()) { |
6578 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) |
6579 | return FT->getExtInfo(); |
6580 | } else if (const auto *FT = t.getAs<FunctionType>()) |
6581 | return FT->getExtInfo(); |
6582 | |
6583 | return FunctionType::ExtInfo(); |
6584 | } |
6585 | |
6586 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { |
6587 | return getFunctionExtInfo(*t); |
6588 | } |
6589 | |
6590 | /// Determine whether this type is more |
6591 | /// qualified than the Other type. For example, "const volatile int" |
6592 | /// is more qualified than "const int", "volatile int", and |
6593 | /// "int". However, it is not more qualified than "const volatile |
6594 | /// int". |
6595 | inline bool QualType::isMoreQualifiedThan(QualType other) const { |
6596 | Qualifiers MyQuals = getQualifiers(); |
6597 | Qualifiers OtherQuals = other.getQualifiers(); |
6598 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); |
6599 | } |
6600 | |
6601 | /// Determine whether this type is at last |
6602 | /// as qualified as the Other type. For example, "const volatile |
6603 | /// int" is at least as qualified as "const int", "volatile int", |
6604 | /// "int", and "const volatile int". |
6605 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { |
6606 | Qualifiers OtherQuals = other.getQualifiers(); |
6607 | |
6608 | // Ignore __unaligned qualifier if this type is a void. |
6609 | if (getUnqualifiedType()->isVoidType()) |
6610 | OtherQuals.removeUnaligned(); |
6611 | |
6612 | return getQualifiers().compatiblyIncludes(OtherQuals); |
6613 | } |
6614 | |
6615 | /// If Type is a reference type (e.g., const |
6616 | /// int&), returns the type that the reference refers to ("const |
6617 | /// int"). Otherwise, returns the type itself. This routine is used |
6618 | /// throughout Sema to implement C++ 5p6: |
6619 | /// |
6620 | /// If an expression initially has the type "reference to T" (8.3.2, |
6621 | /// 8.5.3), the type is adjusted to "T" prior to any further |
6622 | /// analysis, the expression designates the object or function |
6623 | /// denoted by the reference, and the expression is an lvalue. |
6624 | inline QualType QualType::getNonReferenceType() const { |
6625 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) |
6626 | return RefType->getPointeeType(); |
6627 | else |
6628 | return *this; |
6629 | } |
6630 | |
6631 | inline bool QualType::isCForbiddenLValueType() const { |
6632 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || |
6633 | getTypePtr()->isFunctionType()); |
6634 | } |
6635 | |
6636 | /// Tests whether the type is categorized as a fundamental type. |
6637 | /// |
6638 | /// \returns True for types specified in C++0x [basic.fundamental]. |
6639 | inline bool Type::isFundamentalType() const { |
6640 | return isVoidType() || |
6641 | isNullPtrType() || |
6642 | // FIXME: It's really annoying that we don't have an |
6643 | // 'isArithmeticType()' which agrees with the standard definition. |
6644 | (isArithmeticType() && !isEnumeralType()); |
6645 | } |
6646 | |
6647 | /// Tests whether the type is categorized as a compound type. |
6648 | /// |
6649 | /// \returns True for types specified in C++0x [basic.compound]. |
6650 | inline bool Type::isCompoundType() const { |
6651 | // C++0x [basic.compound]p1: |
6652 | // Compound types can be constructed in the following ways: |
6653 | // -- arrays of objects of a given type [...]; |
6654 | return isArrayType() || |
6655 | // -- functions, which have parameters of given types [...]; |
6656 | isFunctionType() || |
6657 | // -- pointers to void or objects or functions [...]; |
6658 | isPointerType() || |
6659 | // -- references to objects or functions of a given type. [...] |
6660 | isReferenceType() || |
6661 | // -- classes containing a sequence of objects of various types, [...]; |
6662 | isRecordType() || |
6663 | // -- unions, which are classes capable of containing objects of different |
6664 | // types at different times; |
6665 | isUnionType() || |
6666 | // -- enumerations, which comprise a set of named constant values. [...]; |
6667 | isEnumeralType() || |
6668 | // -- pointers to non-static class members, [...]. |
6669 | isMemberPointerType(); |
6670 | } |
6671 | |
6672 | inline bool Type::isFunctionType() const { |
6673 | return isa<FunctionType>(CanonicalType); |
6674 | } |
6675 | |
6676 | inline bool Type::isPointerType() const { |
6677 | return isa<PointerType>(CanonicalType); |
6678 | } |
6679 | |
6680 | inline bool Type::isAnyPointerType() const { |
6681 | return isPointerType() || isObjCObjectPointerType(); |
6682 | } |
6683 | |
6684 | inline bool Type::isBlockPointerType() const { |
6685 | return isa<BlockPointerType>(CanonicalType); |
6686 | } |
6687 | |
6688 | inline bool Type::isReferenceType() const { |
6689 | return isa<ReferenceType>(CanonicalType); |
6690 | } |
6691 | |
6692 | inline bool Type::isLValueReferenceType() const { |
6693 | return isa<LValueReferenceType>(CanonicalType); |
6694 | } |
6695 | |
6696 | inline bool Type::isRValueReferenceType() const { |
6697 | return isa<RValueReferenceType>(CanonicalType); |
6698 | } |
6699 | |
6700 | inline bool Type::isObjectPointerType() const { |
6701 | // Note: an "object pointer type" is not the same thing as a pointer to an |
6702 | // object type; rather, it is a pointer to an object type or a pointer to cv |
6703 | // void. |
6704 | if (const auto *T = getAs<PointerType>()) |
6705 | return !T->getPointeeType()->isFunctionType(); |
6706 | else |
6707 | return false; |
6708 | } |
6709 | |
6710 | inline bool Type::isFunctionPointerType() const { |
6711 | if (const auto *T = getAs<PointerType>()) |
6712 | return T->getPointeeType()->isFunctionType(); |
6713 | else |
6714 | return false; |
6715 | } |
6716 | |
6717 | inline bool Type::isFunctionReferenceType() const { |
6718 | if (const auto *T = getAs<ReferenceType>()) |
6719 | return T->getPointeeType()->isFunctionType(); |
6720 | else |
6721 | return false; |
6722 | } |
6723 | |
6724 | inline bool Type::isMemberPointerType() const { |
6725 | return isa<MemberPointerType>(CanonicalType); |
6726 | } |
6727 | |
6728 | inline bool Type::isMemberFunctionPointerType() const { |
6729 | if (const auto *T = getAs<MemberPointerType>()) |
6730 | return T->isMemberFunctionPointer(); |
6731 | else |
6732 | return false; |
6733 | } |
6734 | |
6735 | inline bool Type::isMemberDataPointerType() const { |
6736 | if (const auto *T = getAs<MemberPointerType>()) |
6737 | return T->isMemberDataPointer(); |
6738 | else |
6739 | return false; |
6740 | } |
6741 | |
6742 | inline bool Type::isArrayType() const { |
6743 | return isa<ArrayType>(CanonicalType); |
6744 | } |
6745 | |
6746 | inline bool Type::isConstantArrayType() const { |
6747 | return isa<ConstantArrayType>(CanonicalType); |
6748 | } |
6749 | |
6750 | inline bool Type::isIncompleteArrayType() const { |
6751 | return isa<IncompleteArrayType>(CanonicalType); |
6752 | } |
6753 | |
6754 | inline bool Type::isVariableArrayType() const { |
6755 | return isa<VariableArrayType>(CanonicalType); |
6756 | } |
6757 | |
6758 | inline bool Type::isDependentSizedArrayType() const { |
6759 | return isa<DependentSizedArrayType>(CanonicalType); |
6760 | } |
6761 | |
6762 | inline bool Type::isBuiltinType() const { |
6763 | return isa<BuiltinType>(CanonicalType); |
6764 | } |
6765 | |
6766 | inline bool Type::isRecordType() const { |
6767 | return isa<RecordType>(CanonicalType); |
6768 | } |
6769 | |
6770 | inline bool Type::isEnumeralType() const { |
6771 | return isa<EnumType>(CanonicalType); |
6772 | } |
6773 | |
6774 | inline bool Type::isAnyComplexType() const { |
6775 | return isa<ComplexType>(CanonicalType); |
6776 | } |
6777 | |
6778 | inline bool Type::isVectorType() const { |
6779 | return isa<VectorType>(CanonicalType); |
6780 | } |
6781 | |
6782 | inline bool Type::isExtVectorType() const { |
6783 | return isa<ExtVectorType>(CanonicalType); |
6784 | } |
6785 | |
6786 | inline bool Type::isMatrixType() const { |
6787 | return isa<MatrixType>(CanonicalType); |
6788 | } |
6789 | |
6790 | inline bool Type::isConstantMatrixType() const { |
6791 | return isa<ConstantMatrixType>(CanonicalType); |
6792 | } |
6793 | |
6794 | inline bool Type::isDependentAddressSpaceType() const { |
6795 | return isa<DependentAddressSpaceType>(CanonicalType); |
6796 | } |
6797 | |
6798 | inline bool Type::isObjCObjectPointerType() const { |
6799 | return isa<ObjCObjectPointerType>(CanonicalType); |
6800 | } |
6801 | |
6802 | inline bool Type::isObjCObjectType() const { |
6803 | return isa<ObjCObjectType>(CanonicalType); |
6804 | } |
6805 | |
6806 | inline bool Type::isObjCObjectOrInterfaceType() const { |
6807 | return isa<ObjCInterfaceType>(CanonicalType) || |
6808 | isa<ObjCObjectType>(CanonicalType); |
6809 | } |
6810 | |
6811 | inline bool Type::isAtomicType() const { |
6812 | return isa<AtomicType>(CanonicalType); |
6813 | } |
6814 | |
6815 | inline bool Type::isUndeducedAutoType() const { |
6816 | return isa<AutoType>(CanonicalType); |
6817 | } |
6818 | |
6819 | inline bool Type::isObjCQualifiedIdType() const { |
6820 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6821 | return OPT->isObjCQualifiedIdType(); |
6822 | return false; |
6823 | } |
6824 | |
6825 | inline bool Type::isObjCQualifiedClassType() const { |
6826 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6827 | return OPT->isObjCQualifiedClassType(); |
6828 | return false; |
6829 | } |
6830 | |
6831 | inline bool Type::isObjCIdType() const { |
6832 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6833 | return OPT->isObjCIdType(); |
6834 | return false; |
6835 | } |
6836 | |
6837 | inline bool Type::isObjCClassType() const { |
6838 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6839 | return OPT->isObjCClassType(); |
6840 | return false; |
6841 | } |
6842 | |
6843 | inline bool Type::isObjCSelType() const { |
6844 | if (const auto *OPT = getAs<PointerType>()) |
6845 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); |
6846 | return false; |
6847 | } |
6848 | |
6849 | inline bool Type::isObjCBuiltinType() const { |
6850 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); |
6851 | } |
6852 | |
6853 | inline bool Type::isDecltypeType() const { |
6854 | return isa<DecltypeType>(this); |
6855 | } |
6856 | |
6857 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
6858 | inline bool Type::is##Id##Type() const { \ |
6859 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6860 | } |
6861 | #include "clang/Basic/OpenCLImageTypes.def" |
6862 | |
6863 | inline bool Type::isSamplerT() const { |
6864 | return isSpecificBuiltinType(BuiltinType::OCLSampler); |
6865 | } |
6866 | |
6867 | inline bool Type::isEventT() const { |
6868 | return isSpecificBuiltinType(BuiltinType::OCLEvent); |
6869 | } |
6870 | |
6871 | inline bool Type::isClkEventT() const { |
6872 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); |
6873 | } |
6874 | |
6875 | inline bool Type::isQueueT() const { |
6876 | return isSpecificBuiltinType(BuiltinType::OCLQueue); |
6877 | } |
6878 | |
6879 | inline bool Type::isReserveIDT() const { |
6880 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); |
6881 | } |
6882 | |
6883 | inline bool Type::isImageType() const { |
6884 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || |
6885 | return |
6886 | #include "clang/Basic/OpenCLImageTypes.def" |
6887 | false; // end boolean or operation |
6888 | } |
6889 | |
6890 | inline bool Type::isPipeType() const { |
6891 | return isa<PipeType>(CanonicalType); |
6892 | } |
6893 | |
6894 | inline bool Type::isExtIntType() const { |
6895 | return isa<ExtIntType>(CanonicalType); |
6896 | } |
6897 | |
6898 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
6899 | inline bool Type::is##Id##Type() const { \ |
6900 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6901 | } |
6902 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6903 | |
6904 | inline bool Type::isOCLIntelSubgroupAVCType() const { |
6905 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ |
6906 | isOCLIntelSubgroupAVC##Id##Type() || |
6907 | return |
6908 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6909 | false; // end of boolean or operation |
6910 | } |
6911 | |
6912 | inline bool Type::isOCLExtOpaqueType() const { |
6913 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || |
6914 | return |
6915 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6916 | false; // end of boolean or operation |
6917 | } |
6918 | |
6919 | inline bool Type::isOpenCLSpecificType() const { |
6920 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || |
6921 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); |
6922 | } |
6923 | |
6924 | inline bool Type::isTemplateTypeParmType() const { |
6925 | return isa<TemplateTypeParmType>(CanonicalType); |
6926 | } |
6927 | |
6928 | inline bool Type::isSpecificBuiltinType(unsigned K) const { |
6929 | if (const BuiltinType *BT = getAs<BuiltinType>()) { |
6930 | return BT->getKind() == static_cast<BuiltinType::Kind>(K); |
6931 | } |
6932 | return false; |
6933 | } |
6934 | |
6935 | inline bool Type::isPlaceholderType() const { |
6936 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6937 | return BT->isPlaceholderType(); |
6938 | return false; |
6939 | } |
6940 | |
6941 | inline const BuiltinType *Type::getAsPlaceholderType() const { |
6942 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6943 | if (BT->isPlaceholderType()) |
6944 | return BT; |
6945 | return nullptr; |
6946 | } |
6947 | |
6948 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { |
6949 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))(static_cast <bool> (BuiltinType::isPlaceholderTypeKind ((BuiltinType::Kind) K)) ? void (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 6949, __extension__ __PRETTY_FUNCTION__)); |
6950 | return isSpecificBuiltinType(K); |
6951 | } |
6952 | |
6953 | inline bool Type::isNonOverloadPlaceholderType() const { |
6954 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6955 | return BT->isNonOverloadPlaceholderType(); |
6956 | return false; |
6957 | } |
6958 | |
6959 | inline bool Type::isVoidType() const { |
6960 | return isSpecificBuiltinType(BuiltinType::Void); |
6961 | } |
6962 | |
6963 | inline bool Type::isHalfType() const { |
6964 | // FIXME: Should we allow complex __fp16? Probably not. |
6965 | return isSpecificBuiltinType(BuiltinType::Half); |
6966 | } |
6967 | |
6968 | inline bool Type::isFloat16Type() const { |
6969 | return isSpecificBuiltinType(BuiltinType::Float16); |
6970 | } |
6971 | |
6972 | inline bool Type::isBFloat16Type() const { |
6973 | return isSpecificBuiltinType(BuiltinType::BFloat16); |
6974 | } |
6975 | |
6976 | inline bool Type::isFloat128Type() const { |
6977 | return isSpecificBuiltinType(BuiltinType::Float128); |
6978 | } |
6979 | |
6980 | inline bool Type::isNullPtrType() const { |
6981 | return isSpecificBuiltinType(BuiltinType::NullPtr); |
6982 | } |
6983 | |
6984 | bool IsEnumDeclComplete(EnumDecl *); |
6985 | bool IsEnumDeclScoped(EnumDecl *); |
6986 | |
6987 | inline bool Type::isIntegerType() const { |
6988 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6989 | return BT->getKind() >= BuiltinType::Bool && |
6990 | BT->getKind() <= BuiltinType::Int128; |
6991 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { |
6992 | // Incomplete enum types are not treated as integer types. |
6993 | // FIXME: In C++, enum types are never integer types. |
6994 | return IsEnumDeclComplete(ET->getDecl()) && |
6995 | !IsEnumDeclScoped(ET->getDecl()); |
6996 | } |
6997 | return isExtIntType(); |
6998 | } |
6999 | |
7000 | inline bool Type::isFixedPointType() const { |
7001 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7002 | return BT->getKind() >= BuiltinType::ShortAccum && |
7003 | BT->getKind() <= BuiltinType::SatULongFract; |
7004 | } |
7005 | return false; |
7006 | } |
7007 | |
7008 | inline bool Type::isFixedPointOrIntegerType() const { |
7009 | return isFixedPointType() || isIntegerType(); |
7010 | } |
7011 | |
7012 | inline bool Type::isSaturatedFixedPointType() const { |
7013 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7014 | return BT->getKind() >= BuiltinType::SatShortAccum && |
7015 | BT->getKind() <= BuiltinType::SatULongFract; |
7016 | } |
7017 | return false; |
7018 | } |
7019 | |
7020 | inline bool Type::isUnsaturatedFixedPointType() const { |
7021 | return isFixedPointType() && !isSaturatedFixedPointType(); |
7022 | } |
7023 | |
7024 | inline bool Type::isSignedFixedPointType() const { |
7025 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7026 | return ((BT->getKind() >= BuiltinType::ShortAccum && |
7027 | BT->getKind() <= BuiltinType::LongAccum) || |
7028 | (BT->getKind() >= BuiltinType::ShortFract && |
7029 | BT->getKind() <= BuiltinType::LongFract) || |
7030 | (BT->getKind() >= BuiltinType::SatShortAccum && |
7031 | BT->getKind() <= BuiltinType::SatLongAccum) || |
7032 | (BT->getKind() >= BuiltinType::SatShortFract && |
7033 | BT->getKind() <= BuiltinType::SatLongFract)); |
7034 | } |
7035 | return false; |
7036 | } |
7037 | |
7038 | inline bool Type::isUnsignedFixedPointType() const { |
7039 | return isFixedPointType() && !isSignedFixedPointType(); |
7040 | } |
7041 | |
7042 | inline bool Type::isScalarType() const { |
7043 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7044 | return BT->getKind() > BuiltinType::Void && |
7045 | BT->getKind() <= BuiltinType::NullPtr; |
7046 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) |
7047 | // Enums are scalar types, but only if they are defined. Incomplete enums |
7048 | // are not treated as scalar types. |
7049 | return IsEnumDeclComplete(ET->getDecl()); |
7050 | return isa<PointerType>(CanonicalType) || |
7051 | isa<BlockPointerType>(CanonicalType) || |
7052 | isa<MemberPointerType>(CanonicalType) || |
7053 | isa<ComplexType>(CanonicalType) || |
7054 | isa<ObjCObjectPointerType>(CanonicalType) || |
7055 | isExtIntType(); |
7056 | } |
7057 | |
7058 | inline bool Type::isIntegralOrEnumerationType() const { |
7059 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7060 | return BT->getKind() >= BuiltinType::Bool && |
7061 | BT->getKind() <= BuiltinType::Int128; |
7062 | |
7063 | // Check for a complete enum type; incomplete enum types are not properly an |
7064 | // enumeration type in the sense required here. |
7065 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) |
7066 | return IsEnumDeclComplete(ET->getDecl()); |
7067 | |
7068 | return isExtIntType(); |
7069 | } |
7070 | |
7071 | inline bool Type::isBooleanType() const { |
7072 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7073 | return BT->getKind() == BuiltinType::Bool; |
7074 | return false; |
7075 | } |
7076 | |
7077 | inline bool Type::isUndeducedType() const { |
7078 | auto *DT = getContainedDeducedType(); |
7079 | return DT && !DT->isDeduced(); |
7080 | } |
7081 | |
7082 | /// Determines whether this is a type for which one can define |
7083 | /// an overloaded operator. |
7084 | inline bool Type::isOverloadableType() const { |
7085 | return isDependentType() || isRecordType() || isEnumeralType(); |
7086 | } |
7087 | |
7088 | /// Determines whether this type is written as a typedef-name. |
7089 | inline bool Type::isTypedefNameType() const { |
7090 | if (getAs<TypedefType>()) |
7091 | return true; |
7092 | if (auto *TST = getAs<TemplateSpecializationType>()) |
7093 | return TST->isTypeAlias(); |
7094 | return false; |
7095 | } |
7096 | |
7097 | /// Determines whether this type can decay to a pointer type. |
7098 | inline bool Type::canDecayToPointerType() const { |
7099 | return isFunctionType() || isArrayType(); |
7100 | } |
7101 | |
7102 | inline bool Type::hasPointerRepresentation() const { |
7103 | return (isPointerType() || isReferenceType() || isBlockPointerType() || |
7104 | isObjCObjectPointerType() || isNullPtrType()); |
7105 | } |
7106 | |
7107 | inline bool Type::hasObjCPointerRepresentation() const { |
7108 | return isObjCObjectPointerType(); |
7109 | } |
7110 | |
7111 | inline const Type *Type::getBaseElementTypeUnsafe() const { |
7112 | const Type *type = this; |
7113 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) |
7114 | type = arrayType->getElementType().getTypePtr(); |
7115 | return type; |
7116 | } |
7117 | |
7118 | inline const Type *Type::getPointeeOrArrayElementType() const { |
7119 | const Type *type = this; |
7120 | if (type->isAnyPointerType()) |
7121 | return type->getPointeeType().getTypePtr(); |
7122 | else if (type->isArrayType()) |
7123 | return type->getBaseElementTypeUnsafe(); |
7124 | return type; |
7125 | } |
7126 | /// Insertion operator for partial diagnostics. This allows sending adress |
7127 | /// spaces into a diagnostic with <<. |
7128 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7129 | LangAS AS) { |
7130 | PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), |
7131 | DiagnosticsEngine::ArgumentKind::ak_addrspace); |
7132 | return PD; |
7133 | } |
7134 | |
7135 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers |
7136 | /// into a diagnostic with <<. |
7137 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7138 | Qualifiers Q) { |
7139 | PD.AddTaggedVal(Q.getAsOpaqueValue(), |
7140 | DiagnosticsEngine::ArgumentKind::ak_qual); |
7141 | return PD; |
7142 | } |
7143 | |
7144 | /// Insertion operator for partial diagnostics. This allows sending QualType's |
7145 | /// into a diagnostic with <<. |
7146 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7147 | QualType T) { |
7148 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
7149 | DiagnosticsEngine::ak_qualtype); |
7150 | return PD; |
7151 | } |
7152 | |
7153 | // Helper class template that is used by Type::getAs to ensure that one does |
7154 | // not try to look through a qualified type to get to an array type. |
7155 | template <typename T> |
7156 | using TypeIsArrayType = |
7157 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || |
7158 | std::is_base_of<ArrayType, T>::value>; |
7159 | |
7160 | // Member-template getAs<specific type>'. |
7161 | template <typename T> const T *Type::getAs() const { |
7162 | static_assert(!TypeIsArrayType<T>::value, |
7163 | "ArrayType cannot be used with getAs!"); |
7164 | |
7165 | // If this is directly a T type, return it. |
7166 | if (const auto *Ty = dyn_cast<T>(this)) |
7167 | return Ty; |
7168 | |
7169 | // If the canonical form of this type isn't the right kind, reject it. |
7170 | if (!isa<T>(CanonicalType)) |
7171 | return nullptr; |
7172 | |
7173 | // If this is a typedef for the type, strip the typedef off without |
7174 | // losing all typedef information. |
7175 | return cast<T>(getUnqualifiedDesugaredType()); |
7176 | } |
7177 | |
7178 | template <typename T> const T *Type::getAsAdjusted() const { |
7179 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); |
7180 | |
7181 | // If this is directly a T type, return it. |
7182 | if (const auto *Ty = dyn_cast<T>(this)) |
7183 | return Ty; |
7184 | |
7185 | // If the canonical form of this type isn't the right kind, reject it. |
7186 | if (!isa<T>(CanonicalType)) |
7187 | return nullptr; |
7188 | |
7189 | // Strip off type adjustments that do not modify the underlying nature of the |
7190 | // type. |
7191 | const Type *Ty = this; |
7192 | while (Ty) { |
7193 | if (const auto *A = dyn_cast<AttributedType>(Ty)) |
7194 | Ty = A->getModifiedType().getTypePtr(); |
7195 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) |
7196 | Ty = E->desugar().getTypePtr(); |
7197 | else if (const auto *P = dyn_cast<ParenType>(Ty)) |
7198 | Ty = P->desugar().getTypePtr(); |
7199 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) |
7200 | Ty = A->desugar().getTypePtr(); |
7201 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) |
7202 | Ty = M->desugar().getTypePtr(); |
7203 | else |
7204 | break; |
7205 | } |
7206 | |
7207 | // Just because the canonical type is correct does not mean we can use cast<>, |
7208 | // since we may not have stripped off all the sugar down to the base type. |
7209 | return dyn_cast<T>(Ty); |
7210 | } |
7211 | |
7212 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { |
7213 | // If this is directly an array type, return it. |
7214 | if (const auto *arr = dyn_cast<ArrayType>(this)) |
7215 | return arr; |
7216 | |
7217 | // If the canonical form of this type isn't the right kind, reject it. |
7218 | if (!isa<ArrayType>(CanonicalType)) |
7219 | return nullptr; |
7220 | |
7221 | // If this is a typedef for the type, strip the typedef off without |
7222 | // losing all typedef information. |
7223 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7224 | } |
7225 | |
7226 | template <typename T> const T *Type::castAs() const { |
7227 | static_assert(!TypeIsArrayType<T>::value, |
7228 | "ArrayType cannot be used with castAs!"); |
7229 | |
7230 | if (const auto *ty = dyn_cast<T>(this)) return ty; |
7231 | assert(isa<T>(CanonicalType))(static_cast <bool> (isa<T>(CanonicalType)) ? void (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7231, __extension__ __PRETTY_FUNCTION__)); |
7232 | return cast<T>(getUnqualifiedDesugaredType()); |
7233 | } |
7234 | |
7235 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { |
7236 | assert(isa<ArrayType>(CanonicalType))(static_cast <bool> (isa<ArrayType>(CanonicalType )) ? void (0) : __assert_fail ("isa<ArrayType>(CanonicalType)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7236, __extension__ __PRETTY_FUNCTION__)); |
7237 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; |
7238 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7239 | } |
7240 | |
7241 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, |
7242 | QualType CanonicalPtr) |
7243 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { |
7244 | #ifndef NDEBUG |
7245 | QualType Adjusted = getAdjustedType(); |
7246 | (void)AttributedType::stripOuterNullability(Adjusted); |
7247 | assert(isa<PointerType>(Adjusted))(static_cast <bool> (isa<PointerType>(Adjusted)) ? void (0) : __assert_fail ("isa<PointerType>(Adjusted)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7247, __extension__ __PRETTY_FUNCTION__)); |
7248 | #endif |
7249 | } |
7250 | |
7251 | QualType DecayedType::getPointeeType() const { |
7252 | QualType Decayed = getDecayedType(); |
7253 | (void)AttributedType::stripOuterNullability(Decayed); |
7254 | return cast<PointerType>(Decayed)->getPointeeType(); |
7255 | } |
7256 | |
7257 | // Get the decimal string representation of a fixed point type, represented |
7258 | // as a scaled integer. |
7259 | // TODO: At some point, we should change the arguments to instead just accept an |
7260 | // APFixedPoint instead of APSInt and scale. |
7261 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, |
7262 | unsigned Scale); |
7263 | |
7264 | } // namespace clang |
7265 | |
7266 | #endif // LLVM_CLANG_AST_TYPE_H |