File: | clang/lib/Sema/SemaTemplateDeduction.cpp |
Warning: | line 3923, column 31 Called C++ object pointer is null |
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1 | //===- SemaTemplateDeduction.cpp - Template Argument Deduction ------------===// | ||||||
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 C++ template argument deduction. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #include "clang/Sema/TemplateDeduction.h" | ||||||
14 | #include "TreeTransform.h" | ||||||
15 | #include "TypeLocBuilder.h" | ||||||
16 | #include "clang/AST/ASTContext.h" | ||||||
17 | #include "clang/AST/ASTLambda.h" | ||||||
18 | #include "clang/AST/Decl.h" | ||||||
19 | #include "clang/AST/DeclAccessPair.h" | ||||||
20 | #include "clang/AST/DeclBase.h" | ||||||
21 | #include "clang/AST/DeclCXX.h" | ||||||
22 | #include "clang/AST/DeclTemplate.h" | ||||||
23 | #include "clang/AST/DeclarationName.h" | ||||||
24 | #include "clang/AST/Expr.h" | ||||||
25 | #include "clang/AST/ExprCXX.h" | ||||||
26 | #include "clang/AST/NestedNameSpecifier.h" | ||||||
27 | #include "clang/AST/RecursiveASTVisitor.h" | ||||||
28 | #include "clang/AST/TemplateBase.h" | ||||||
29 | #include "clang/AST/TemplateName.h" | ||||||
30 | #include "clang/AST/Type.h" | ||||||
31 | #include "clang/AST/TypeLoc.h" | ||||||
32 | #include "clang/AST/UnresolvedSet.h" | ||||||
33 | #include "clang/Basic/AddressSpaces.h" | ||||||
34 | #include "clang/Basic/ExceptionSpecificationType.h" | ||||||
35 | #include "clang/Basic/LLVM.h" | ||||||
36 | #include "clang/Basic/LangOptions.h" | ||||||
37 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
38 | #include "clang/Basic/SourceLocation.h" | ||||||
39 | #include "clang/Basic/Specifiers.h" | ||||||
40 | #include "clang/Sema/Ownership.h" | ||||||
41 | #include "clang/Sema/Sema.h" | ||||||
42 | #include "clang/Sema/Template.h" | ||||||
43 | #include "llvm/ADT/APInt.h" | ||||||
44 | #include "llvm/ADT/APSInt.h" | ||||||
45 | #include "llvm/ADT/ArrayRef.h" | ||||||
46 | #include "llvm/ADT/DenseMap.h" | ||||||
47 | #include "llvm/ADT/FoldingSet.h" | ||||||
48 | #include "llvm/ADT/Optional.h" | ||||||
49 | #include "llvm/ADT/SmallBitVector.h" | ||||||
50 | #include "llvm/ADT/SmallPtrSet.h" | ||||||
51 | #include "llvm/ADT/SmallVector.h" | ||||||
52 | #include "llvm/Support/Casting.h" | ||||||
53 | #include "llvm/Support/Compiler.h" | ||||||
54 | #include "llvm/Support/ErrorHandling.h" | ||||||
55 | #include <algorithm> | ||||||
56 | #include <cassert> | ||||||
57 | #include <tuple> | ||||||
58 | #include <utility> | ||||||
59 | |||||||
60 | namespace clang { | ||||||
61 | |||||||
62 | /// Various flags that control template argument deduction. | ||||||
63 | /// | ||||||
64 | /// These flags can be bitwise-OR'd together. | ||||||
65 | enum TemplateDeductionFlags { | ||||||
66 | /// No template argument deduction flags, which indicates the | ||||||
67 | /// strictest results for template argument deduction (as used for, e.g., | ||||||
68 | /// matching class template partial specializations). | ||||||
69 | TDF_None = 0, | ||||||
70 | |||||||
71 | /// Within template argument deduction from a function call, we are | ||||||
72 | /// matching with a parameter type for which the original parameter was | ||||||
73 | /// a reference. | ||||||
74 | TDF_ParamWithReferenceType = 0x1, | ||||||
75 | |||||||
76 | /// Within template argument deduction from a function call, we | ||||||
77 | /// are matching in a case where we ignore cv-qualifiers. | ||||||
78 | TDF_IgnoreQualifiers = 0x02, | ||||||
79 | |||||||
80 | /// Within template argument deduction from a function call, | ||||||
81 | /// we are matching in a case where we can perform template argument | ||||||
82 | /// deduction from a template-id of a derived class of the argument type. | ||||||
83 | TDF_DerivedClass = 0x04, | ||||||
84 | |||||||
85 | /// Allow non-dependent types to differ, e.g., when performing | ||||||
86 | /// template argument deduction from a function call where conversions | ||||||
87 | /// may apply. | ||||||
88 | TDF_SkipNonDependent = 0x08, | ||||||
89 | |||||||
90 | /// Whether we are performing template argument deduction for | ||||||
91 | /// parameters and arguments in a top-level template argument | ||||||
92 | TDF_TopLevelParameterTypeList = 0x10, | ||||||
93 | |||||||
94 | /// Within template argument deduction from overload resolution per | ||||||
95 | /// C++ [over.over] allow matching function types that are compatible in | ||||||
96 | /// terms of noreturn and default calling convention adjustments, or | ||||||
97 | /// similarly matching a declared template specialization against a | ||||||
98 | /// possible template, per C++ [temp.deduct.decl]. In either case, permit | ||||||
99 | /// deduction where the parameter is a function type that can be converted | ||||||
100 | /// to the argument type. | ||||||
101 | TDF_AllowCompatibleFunctionType = 0x20, | ||||||
102 | |||||||
103 | /// Within template argument deduction for a conversion function, we are | ||||||
104 | /// matching with an argument type for which the original argument was | ||||||
105 | /// a reference. | ||||||
106 | TDF_ArgWithReferenceType = 0x40, | ||||||
107 | }; | ||||||
108 | } | ||||||
109 | |||||||
110 | using namespace clang; | ||||||
111 | using namespace sema; | ||||||
112 | |||||||
113 | /// Compare two APSInts, extending and switching the sign as | ||||||
114 | /// necessary to compare their values regardless of underlying type. | ||||||
115 | static bool hasSameExtendedValue(llvm::APSInt X, llvm::APSInt Y) { | ||||||
116 | if (Y.getBitWidth() > X.getBitWidth()) | ||||||
117 | X = X.extend(Y.getBitWidth()); | ||||||
118 | else if (Y.getBitWidth() < X.getBitWidth()) | ||||||
119 | Y = Y.extend(X.getBitWidth()); | ||||||
120 | |||||||
121 | // If there is a signedness mismatch, correct it. | ||||||
122 | if (X.isSigned() != Y.isSigned()) { | ||||||
123 | // If the signed value is negative, then the values cannot be the same. | ||||||
124 | if ((Y.isSigned() && Y.isNegative()) || (X.isSigned() && X.isNegative())) | ||||||
125 | return false; | ||||||
126 | |||||||
127 | Y.setIsSigned(true); | ||||||
128 | X.setIsSigned(true); | ||||||
129 | } | ||||||
130 | |||||||
131 | return X == Y; | ||||||
132 | } | ||||||
133 | |||||||
134 | static Sema::TemplateDeductionResult | ||||||
135 | DeduceTemplateArguments(Sema &S, | ||||||
136 | TemplateParameterList *TemplateParams, | ||||||
137 | const TemplateArgument &Param, | ||||||
138 | TemplateArgument Arg, | ||||||
139 | TemplateDeductionInfo &Info, | ||||||
140 | SmallVectorImpl<DeducedTemplateArgument> &Deduced); | ||||||
141 | |||||||
142 | static Sema::TemplateDeductionResult | ||||||
143 | DeduceTemplateArgumentsByTypeMatch(Sema &S, | ||||||
144 | TemplateParameterList *TemplateParams, | ||||||
145 | QualType Param, | ||||||
146 | QualType Arg, | ||||||
147 | TemplateDeductionInfo &Info, | ||||||
148 | SmallVectorImpl<DeducedTemplateArgument> & | ||||||
149 | Deduced, | ||||||
150 | unsigned TDF, | ||||||
151 | bool PartialOrdering = false, | ||||||
152 | bool DeducedFromArrayBound = false); | ||||||
153 | |||||||
154 | static Sema::TemplateDeductionResult | ||||||
155 | DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams, | ||||||
156 | ArrayRef<TemplateArgument> Params, | ||||||
157 | ArrayRef<TemplateArgument> Args, | ||||||
158 | TemplateDeductionInfo &Info, | ||||||
159 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
160 | bool NumberOfArgumentsMustMatch); | ||||||
161 | |||||||
162 | static void MarkUsedTemplateParameters(ASTContext &Ctx, | ||||||
163 | const TemplateArgument &TemplateArg, | ||||||
164 | bool OnlyDeduced, unsigned Depth, | ||||||
165 | llvm::SmallBitVector &Used); | ||||||
166 | |||||||
167 | static void MarkUsedTemplateParameters(ASTContext &Ctx, QualType T, | ||||||
168 | bool OnlyDeduced, unsigned Level, | ||||||
169 | llvm::SmallBitVector &Deduced); | ||||||
170 | |||||||
171 | /// If the given expression is of a form that permits the deduction | ||||||
172 | /// of a non-type template parameter, return the declaration of that | ||||||
173 | /// non-type template parameter. | ||||||
174 | static const NonTypeTemplateParmDecl * | ||||||
175 | getDeducedParameterFromExpr(const Expr *E, unsigned Depth) { | ||||||
176 | // If we are within an alias template, the expression may have undergone | ||||||
177 | // any number of parameter substitutions already. | ||||||
178 | while (true) { | ||||||
179 | if (const auto *IC = dyn_cast<ImplicitCastExpr>(E)) | ||||||
180 | E = IC->getSubExpr(); | ||||||
181 | else if (const auto *CE = dyn_cast<ConstantExpr>(E)) | ||||||
182 | E = CE->getSubExpr(); | ||||||
183 | else if (const auto *Subst = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) | ||||||
184 | E = Subst->getReplacement(); | ||||||
185 | else if (const auto *CCE = dyn_cast<CXXConstructExpr>(E)) { | ||||||
186 | // Look through implicit copy construction from an lvalue of the same type. | ||||||
187 | if (CCE->getParenOrBraceRange().isValid()) | ||||||
188 | break; | ||||||
189 | // Note, there could be default arguments. | ||||||
190 | assert(CCE->getNumArgs() >= 1 && "implicit construct expr should have 1 arg")((CCE->getNumArgs() >= 1 && "implicit construct expr should have 1 arg" ) ? static_cast<void> (0) : __assert_fail ("CCE->getNumArgs() >= 1 && \"implicit construct expr should have 1 arg\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 190, __PRETTY_FUNCTION__)); | ||||||
191 | E = CCE->getArg(0); | ||||||
192 | } else | ||||||
193 | break; | ||||||
194 | } | ||||||
195 | |||||||
196 | if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) | ||||||
197 | if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl())) | ||||||
198 | if (NTTP->getDepth() == Depth) | ||||||
199 | return NTTP; | ||||||
200 | |||||||
201 | return nullptr; | ||||||
202 | } | ||||||
203 | |||||||
204 | static const NonTypeTemplateParmDecl * | ||||||
205 | getDeducedParameterFromExpr(TemplateDeductionInfo &Info, Expr *E) { | ||||||
206 | return getDeducedParameterFromExpr(E, Info.getDeducedDepth()); | ||||||
207 | } | ||||||
208 | |||||||
209 | /// Determine whether two declaration pointers refer to the same | ||||||
210 | /// declaration. | ||||||
211 | static bool isSameDeclaration(Decl *X, Decl *Y) { | ||||||
212 | if (NamedDecl *NX = dyn_cast<NamedDecl>(X)) | ||||||
213 | X = NX->getUnderlyingDecl(); | ||||||
214 | if (NamedDecl *NY = dyn_cast<NamedDecl>(Y)) | ||||||
215 | Y = NY->getUnderlyingDecl(); | ||||||
216 | |||||||
217 | return X->getCanonicalDecl() == Y->getCanonicalDecl(); | ||||||
218 | } | ||||||
219 | |||||||
220 | /// Verify that the given, deduced template arguments are compatible. | ||||||
221 | /// | ||||||
222 | /// \returns The deduced template argument, or a NULL template argument if | ||||||
223 | /// the deduced template arguments were incompatible. | ||||||
224 | static DeducedTemplateArgument | ||||||
225 | checkDeducedTemplateArguments(ASTContext &Context, | ||||||
226 | const DeducedTemplateArgument &X, | ||||||
227 | const DeducedTemplateArgument &Y) { | ||||||
228 | // We have no deduction for one or both of the arguments; they're compatible. | ||||||
229 | if (X.isNull()) | ||||||
230 | return Y; | ||||||
231 | if (Y.isNull()) | ||||||
232 | return X; | ||||||
233 | |||||||
234 | // If we have two non-type template argument values deduced for the same | ||||||
235 | // parameter, they must both match the type of the parameter, and thus must | ||||||
236 | // match each other's type. As we're only keeping one of them, we must check | ||||||
237 | // for that now. The exception is that if either was deduced from an array | ||||||
238 | // bound, the type is permitted to differ. | ||||||
239 | if (!X.wasDeducedFromArrayBound() && !Y.wasDeducedFromArrayBound()) { | ||||||
240 | QualType XType = X.getNonTypeTemplateArgumentType(); | ||||||
241 | if (!XType.isNull()) { | ||||||
242 | QualType YType = Y.getNonTypeTemplateArgumentType(); | ||||||
243 | if (YType.isNull() || !Context.hasSameType(XType, YType)) | ||||||
244 | return DeducedTemplateArgument(); | ||||||
245 | } | ||||||
246 | } | ||||||
247 | |||||||
248 | switch (X.getKind()) { | ||||||
249 | case TemplateArgument::Null: | ||||||
250 | llvm_unreachable("Non-deduced template arguments handled above")::llvm::llvm_unreachable_internal("Non-deduced template arguments handled above" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 250); | ||||||
251 | |||||||
252 | case TemplateArgument::Type: | ||||||
253 | // If two template type arguments have the same type, they're compatible. | ||||||
254 | if (Y.getKind() == TemplateArgument::Type && | ||||||
255 | Context.hasSameType(X.getAsType(), Y.getAsType())) | ||||||
256 | return X; | ||||||
257 | |||||||
258 | // If one of the two arguments was deduced from an array bound, the other | ||||||
259 | // supersedes it. | ||||||
260 | if (X.wasDeducedFromArrayBound() != Y.wasDeducedFromArrayBound()) | ||||||
261 | return X.wasDeducedFromArrayBound() ? Y : X; | ||||||
262 | |||||||
263 | // The arguments are not compatible. | ||||||
264 | return DeducedTemplateArgument(); | ||||||
265 | |||||||
266 | case TemplateArgument::Integral: | ||||||
267 | // If we deduced a constant in one case and either a dependent expression or | ||||||
268 | // declaration in another case, keep the integral constant. | ||||||
269 | // If both are integral constants with the same value, keep that value. | ||||||
270 | if (Y.getKind() == TemplateArgument::Expression || | ||||||
271 | Y.getKind() == TemplateArgument::Declaration || | ||||||
272 | (Y.getKind() == TemplateArgument::Integral && | ||||||
273 | hasSameExtendedValue(X.getAsIntegral(), Y.getAsIntegral()))) | ||||||
274 | return X.wasDeducedFromArrayBound() ? Y : X; | ||||||
275 | |||||||
276 | // All other combinations are incompatible. | ||||||
277 | return DeducedTemplateArgument(); | ||||||
278 | |||||||
279 | case TemplateArgument::Template: | ||||||
280 | if (Y.getKind() == TemplateArgument::Template && | ||||||
281 | Context.hasSameTemplateName(X.getAsTemplate(), Y.getAsTemplate())) | ||||||
282 | return X; | ||||||
283 | |||||||
284 | // All other combinations are incompatible. | ||||||
285 | return DeducedTemplateArgument(); | ||||||
286 | |||||||
287 | case TemplateArgument::TemplateExpansion: | ||||||
288 | if (Y.getKind() == TemplateArgument::TemplateExpansion && | ||||||
289 | Context.hasSameTemplateName(X.getAsTemplateOrTemplatePattern(), | ||||||
290 | Y.getAsTemplateOrTemplatePattern())) | ||||||
291 | return X; | ||||||
292 | |||||||
293 | // All other combinations are incompatible. | ||||||
294 | return DeducedTemplateArgument(); | ||||||
295 | |||||||
296 | case TemplateArgument::Expression: { | ||||||
297 | if (Y.getKind() != TemplateArgument::Expression) | ||||||
298 | return checkDeducedTemplateArguments(Context, Y, X); | ||||||
299 | |||||||
300 | // Compare the expressions for equality | ||||||
301 | llvm::FoldingSetNodeID ID1, ID2; | ||||||
302 | X.getAsExpr()->Profile(ID1, Context, true); | ||||||
303 | Y.getAsExpr()->Profile(ID2, Context, true); | ||||||
304 | if (ID1 == ID2) | ||||||
305 | return X.wasDeducedFromArrayBound() ? Y : X; | ||||||
306 | |||||||
307 | // Differing dependent expressions are incompatible. | ||||||
308 | return DeducedTemplateArgument(); | ||||||
309 | } | ||||||
310 | |||||||
311 | case TemplateArgument::Declaration: | ||||||
312 | assert(!X.wasDeducedFromArrayBound())((!X.wasDeducedFromArrayBound()) ? static_cast<void> (0 ) : __assert_fail ("!X.wasDeducedFromArrayBound()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 312, __PRETTY_FUNCTION__)); | ||||||
313 | |||||||
314 | // If we deduced a declaration and a dependent expression, keep the | ||||||
315 | // declaration. | ||||||
316 | if (Y.getKind() == TemplateArgument::Expression) | ||||||
317 | return X; | ||||||
318 | |||||||
319 | // If we deduced a declaration and an integral constant, keep the | ||||||
320 | // integral constant and whichever type did not come from an array | ||||||
321 | // bound. | ||||||
322 | if (Y.getKind() == TemplateArgument::Integral) { | ||||||
323 | if (Y.wasDeducedFromArrayBound()) | ||||||
324 | return TemplateArgument(Context, Y.getAsIntegral(), | ||||||
325 | X.getParamTypeForDecl()); | ||||||
326 | return Y; | ||||||
327 | } | ||||||
328 | |||||||
329 | // If we deduced two declarations, make sure that they refer to the | ||||||
330 | // same declaration. | ||||||
331 | if (Y.getKind() == TemplateArgument::Declaration && | ||||||
332 | isSameDeclaration(X.getAsDecl(), Y.getAsDecl())) | ||||||
333 | return X; | ||||||
334 | |||||||
335 | // All other combinations are incompatible. | ||||||
336 | return DeducedTemplateArgument(); | ||||||
337 | |||||||
338 | case TemplateArgument::NullPtr: | ||||||
339 | // If we deduced a null pointer and a dependent expression, keep the | ||||||
340 | // null pointer. | ||||||
341 | if (Y.getKind() == TemplateArgument::Expression) | ||||||
342 | return X; | ||||||
343 | |||||||
344 | // If we deduced a null pointer and an integral constant, keep the | ||||||
345 | // integral constant. | ||||||
346 | if (Y.getKind() == TemplateArgument::Integral) | ||||||
347 | return Y; | ||||||
348 | |||||||
349 | // If we deduced two null pointers, they are the same. | ||||||
350 | if (Y.getKind() == TemplateArgument::NullPtr) | ||||||
351 | return X; | ||||||
352 | |||||||
353 | // All other combinations are incompatible. | ||||||
354 | return DeducedTemplateArgument(); | ||||||
355 | |||||||
356 | case TemplateArgument::Pack: { | ||||||
357 | if (Y.getKind() != TemplateArgument::Pack || | ||||||
358 | X.pack_size() != Y.pack_size()) | ||||||
359 | return DeducedTemplateArgument(); | ||||||
360 | |||||||
361 | llvm::SmallVector<TemplateArgument, 8> NewPack; | ||||||
362 | for (TemplateArgument::pack_iterator XA = X.pack_begin(), | ||||||
363 | XAEnd = X.pack_end(), | ||||||
364 | YA = Y.pack_begin(); | ||||||
365 | XA != XAEnd; ++XA, ++YA) { | ||||||
366 | TemplateArgument Merged = checkDeducedTemplateArguments( | ||||||
367 | Context, DeducedTemplateArgument(*XA, X.wasDeducedFromArrayBound()), | ||||||
368 | DeducedTemplateArgument(*YA, Y.wasDeducedFromArrayBound())); | ||||||
369 | if (Merged.isNull() && !(XA->isNull() && YA->isNull())) | ||||||
370 | return DeducedTemplateArgument(); | ||||||
371 | NewPack.push_back(Merged); | ||||||
372 | } | ||||||
373 | |||||||
374 | return DeducedTemplateArgument( | ||||||
375 | TemplateArgument::CreatePackCopy(Context, NewPack), | ||||||
376 | X.wasDeducedFromArrayBound() && Y.wasDeducedFromArrayBound()); | ||||||
377 | } | ||||||
378 | } | ||||||
379 | |||||||
380 | llvm_unreachable("Invalid TemplateArgument Kind!")::llvm::llvm_unreachable_internal("Invalid TemplateArgument Kind!" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 380); | ||||||
381 | } | ||||||
382 | |||||||
383 | /// Deduce the value of the given non-type template parameter | ||||||
384 | /// as the given deduced template argument. All non-type template parameter | ||||||
385 | /// deduction is funneled through here. | ||||||
386 | static Sema::TemplateDeductionResult DeduceNonTypeTemplateArgument( | ||||||
387 | Sema &S, TemplateParameterList *TemplateParams, | ||||||
388 | const NonTypeTemplateParmDecl *NTTP, const DeducedTemplateArgument &NewDeduced, | ||||||
389 | QualType ValueType, TemplateDeductionInfo &Info, | ||||||
390 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
391 | assert(NTTP->getDepth() == Info.getDeducedDepth() &&((NTTP->getDepth() == Info.getDeducedDepth() && "deducing non-type template argument with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"deducing non-type template argument with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 392, __PRETTY_FUNCTION__)) | ||||||
392 | "deducing non-type template argument with wrong depth")((NTTP->getDepth() == Info.getDeducedDepth() && "deducing non-type template argument with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"deducing non-type template argument with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 392, __PRETTY_FUNCTION__)); | ||||||
393 | |||||||
394 | DeducedTemplateArgument Result = checkDeducedTemplateArguments( | ||||||
395 | S.Context, Deduced[NTTP->getIndex()], NewDeduced); | ||||||
396 | if (Result.isNull()) { | ||||||
397 | Info.Param = const_cast<NonTypeTemplateParmDecl*>(NTTP); | ||||||
398 | Info.FirstArg = Deduced[NTTP->getIndex()]; | ||||||
399 | Info.SecondArg = NewDeduced; | ||||||
400 | return Sema::TDK_Inconsistent; | ||||||
401 | } | ||||||
402 | |||||||
403 | Deduced[NTTP->getIndex()] = Result; | ||||||
404 | if (!S.getLangOpts().CPlusPlus17) | ||||||
405 | return Sema::TDK_Success; | ||||||
406 | |||||||
407 | if (NTTP->isExpandedParameterPack()) | ||||||
408 | // FIXME: We may still need to deduce parts of the type here! But we | ||||||
409 | // don't have any way to find which slice of the type to use, and the | ||||||
410 | // type stored on the NTTP itself is nonsense. Perhaps the type of an | ||||||
411 | // expanded NTTP should be a pack expansion type? | ||||||
412 | return Sema::TDK_Success; | ||||||
413 | |||||||
414 | // Get the type of the parameter for deduction. If it's a (dependent) array | ||||||
415 | // or function type, we will not have decayed it yet, so do that now. | ||||||
416 | QualType ParamType = S.Context.getAdjustedParameterType(NTTP->getType()); | ||||||
417 | if (auto *Expansion = dyn_cast<PackExpansionType>(ParamType)) | ||||||
418 | ParamType = Expansion->getPattern(); | ||||||
419 | |||||||
420 | // FIXME: It's not clear how deduction of a parameter of reference | ||||||
421 | // type from an argument (of non-reference type) should be performed. | ||||||
422 | // For now, we just remove reference types from both sides and let | ||||||
423 | // the final check for matching types sort out the mess. | ||||||
424 | ValueType = ValueType.getNonReferenceType(); | ||||||
425 | if (ParamType->isReferenceType()) | ||||||
426 | ParamType = ParamType.getNonReferenceType(); | ||||||
427 | else | ||||||
428 | // Top-level cv-qualifiers are irrelevant for a non-reference type. | ||||||
429 | ValueType = ValueType.getUnqualifiedType(); | ||||||
430 | |||||||
431 | return DeduceTemplateArgumentsByTypeMatch( | ||||||
432 | S, TemplateParams, ParamType, ValueType, Info, Deduced, | ||||||
433 | TDF_SkipNonDependent, /*PartialOrdering=*/false, | ||||||
434 | /*ArrayBound=*/NewDeduced.wasDeducedFromArrayBound()); | ||||||
435 | } | ||||||
436 | |||||||
437 | /// Deduce the value of the given non-type template parameter | ||||||
438 | /// from the given integral constant. | ||||||
439 | static Sema::TemplateDeductionResult DeduceNonTypeTemplateArgument( | ||||||
440 | Sema &S, TemplateParameterList *TemplateParams, | ||||||
441 | const NonTypeTemplateParmDecl *NTTP, const llvm::APSInt &Value, | ||||||
442 | QualType ValueType, bool DeducedFromArrayBound, TemplateDeductionInfo &Info, | ||||||
443 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
444 | return DeduceNonTypeTemplateArgument( | ||||||
445 | S, TemplateParams, NTTP, | ||||||
446 | DeducedTemplateArgument(S.Context, Value, ValueType, | ||||||
447 | DeducedFromArrayBound), | ||||||
448 | ValueType, Info, Deduced); | ||||||
449 | } | ||||||
450 | |||||||
451 | /// Deduce the value of the given non-type template parameter | ||||||
452 | /// from the given null pointer template argument type. | ||||||
453 | static Sema::TemplateDeductionResult DeduceNullPtrTemplateArgument( | ||||||
454 | Sema &S, TemplateParameterList *TemplateParams, | ||||||
455 | const NonTypeTemplateParmDecl *NTTP, QualType NullPtrType, | ||||||
456 | TemplateDeductionInfo &Info, | ||||||
457 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
458 | Expr *Value = S.ImpCastExprToType( | ||||||
459 | new (S.Context) CXXNullPtrLiteralExpr(S.Context.NullPtrTy, | ||||||
460 | NTTP->getLocation()), | ||||||
461 | NullPtrType, | ||||||
462 | NullPtrType->isMemberPointerType() ? CK_NullToMemberPointer | ||||||
463 | : CK_NullToPointer) | ||||||
464 | .get(); | ||||||
465 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
466 | DeducedTemplateArgument(Value), | ||||||
467 | Value->getType(), Info, Deduced); | ||||||
468 | } | ||||||
469 | |||||||
470 | /// Deduce the value of the given non-type template parameter | ||||||
471 | /// from the given type- or value-dependent expression. | ||||||
472 | /// | ||||||
473 | /// \returns true if deduction succeeded, false otherwise. | ||||||
474 | static Sema::TemplateDeductionResult DeduceNonTypeTemplateArgument( | ||||||
475 | Sema &S, TemplateParameterList *TemplateParams, | ||||||
476 | const NonTypeTemplateParmDecl *NTTP, Expr *Value, TemplateDeductionInfo &Info, | ||||||
477 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
478 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
479 | DeducedTemplateArgument(Value), | ||||||
480 | Value->getType(), Info, Deduced); | ||||||
481 | } | ||||||
482 | |||||||
483 | /// Deduce the value of the given non-type template parameter | ||||||
484 | /// from the given declaration. | ||||||
485 | /// | ||||||
486 | /// \returns true if deduction succeeded, false otherwise. | ||||||
487 | static Sema::TemplateDeductionResult DeduceNonTypeTemplateArgument( | ||||||
488 | Sema &S, TemplateParameterList *TemplateParams, | ||||||
489 | const NonTypeTemplateParmDecl *NTTP, ValueDecl *D, QualType T, | ||||||
490 | TemplateDeductionInfo &Info, | ||||||
491 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
492 | D = D ? cast<ValueDecl>(D->getCanonicalDecl()) : nullptr; | ||||||
493 | TemplateArgument New(D, T); | ||||||
494 | return DeduceNonTypeTemplateArgument( | ||||||
495 | S, TemplateParams, NTTP, DeducedTemplateArgument(New), T, Info, Deduced); | ||||||
496 | } | ||||||
497 | |||||||
498 | static Sema::TemplateDeductionResult | ||||||
499 | DeduceTemplateArguments(Sema &S, | ||||||
500 | TemplateParameterList *TemplateParams, | ||||||
501 | TemplateName Param, | ||||||
502 | TemplateName Arg, | ||||||
503 | TemplateDeductionInfo &Info, | ||||||
504 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
505 | TemplateDecl *ParamDecl = Param.getAsTemplateDecl(); | ||||||
506 | if (!ParamDecl) { | ||||||
507 | // The parameter type is dependent and is not a template template parameter, | ||||||
508 | // so there is nothing that we can deduce. | ||||||
509 | return Sema::TDK_Success; | ||||||
510 | } | ||||||
511 | |||||||
512 | if (TemplateTemplateParmDecl *TempParam | ||||||
513 | = dyn_cast<TemplateTemplateParmDecl>(ParamDecl)) { | ||||||
514 | // If we're not deducing at this depth, there's nothing to deduce. | ||||||
515 | if (TempParam->getDepth() != Info.getDeducedDepth()) | ||||||
516 | return Sema::TDK_Success; | ||||||
517 | |||||||
518 | DeducedTemplateArgument NewDeduced(S.Context.getCanonicalTemplateName(Arg)); | ||||||
519 | DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, | ||||||
520 | Deduced[TempParam->getIndex()], | ||||||
521 | NewDeduced); | ||||||
522 | if (Result.isNull()) { | ||||||
523 | Info.Param = TempParam; | ||||||
524 | Info.FirstArg = Deduced[TempParam->getIndex()]; | ||||||
525 | Info.SecondArg = NewDeduced; | ||||||
526 | return Sema::TDK_Inconsistent; | ||||||
527 | } | ||||||
528 | |||||||
529 | Deduced[TempParam->getIndex()] = Result; | ||||||
530 | return Sema::TDK_Success; | ||||||
531 | } | ||||||
532 | |||||||
533 | // Verify that the two template names are equivalent. | ||||||
534 | if (S.Context.hasSameTemplateName(Param, Arg)) | ||||||
535 | return Sema::TDK_Success; | ||||||
536 | |||||||
537 | // Mismatch of non-dependent template parameter to argument. | ||||||
538 | Info.FirstArg = TemplateArgument(Param); | ||||||
539 | Info.SecondArg = TemplateArgument(Arg); | ||||||
540 | return Sema::TDK_NonDeducedMismatch; | ||||||
541 | } | ||||||
542 | |||||||
543 | /// Deduce the template arguments by comparing the template parameter | ||||||
544 | /// type (which is a template-id) with the template argument type. | ||||||
545 | /// | ||||||
546 | /// \param S the Sema | ||||||
547 | /// | ||||||
548 | /// \param TemplateParams the template parameters that we are deducing | ||||||
549 | /// | ||||||
550 | /// \param Param the parameter type | ||||||
551 | /// | ||||||
552 | /// \param Arg the argument type | ||||||
553 | /// | ||||||
554 | /// \param Info information about the template argument deduction itself | ||||||
555 | /// | ||||||
556 | /// \param Deduced the deduced template arguments | ||||||
557 | /// | ||||||
558 | /// \returns the result of template argument deduction so far. Note that a | ||||||
559 | /// "success" result means that template argument deduction has not yet failed, | ||||||
560 | /// but it may still fail, later, for other reasons. | ||||||
561 | static Sema::TemplateDeductionResult | ||||||
562 | DeduceTemplateArguments(Sema &S, | ||||||
563 | TemplateParameterList *TemplateParams, | ||||||
564 | const TemplateSpecializationType *Param, | ||||||
565 | QualType Arg, | ||||||
566 | TemplateDeductionInfo &Info, | ||||||
567 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
568 | assert(Arg.isCanonical() && "Argument type must be canonical")((Arg.isCanonical() && "Argument type must be canonical" ) ? static_cast<void> (0) : __assert_fail ("Arg.isCanonical() && \"Argument type must be canonical\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 568, __PRETTY_FUNCTION__)); | ||||||
569 | |||||||
570 | // Treat an injected-class-name as its underlying template-id. | ||||||
571 | if (auto *Injected = dyn_cast<InjectedClassNameType>(Arg)) | ||||||
572 | Arg = Injected->getInjectedSpecializationType(); | ||||||
573 | |||||||
574 | // Check whether the template argument is a dependent template-id. | ||||||
575 | if (const TemplateSpecializationType *SpecArg | ||||||
576 | = dyn_cast<TemplateSpecializationType>(Arg)) { | ||||||
577 | // Perform template argument deduction for the template name. | ||||||
578 | if (Sema::TemplateDeductionResult Result | ||||||
579 | = DeduceTemplateArguments(S, TemplateParams, | ||||||
580 | Param->getTemplateName(), | ||||||
581 | SpecArg->getTemplateName(), | ||||||
582 | Info, Deduced)) | ||||||
583 | return Result; | ||||||
584 | |||||||
585 | |||||||
586 | // Perform template argument deduction on each template | ||||||
587 | // argument. Ignore any missing/extra arguments, since they could be | ||||||
588 | // filled in by default arguments. | ||||||
589 | return DeduceTemplateArguments(S, TemplateParams, | ||||||
590 | Param->template_arguments(), | ||||||
591 | SpecArg->template_arguments(), Info, Deduced, | ||||||
592 | /*NumberOfArgumentsMustMatch=*/false); | ||||||
593 | } | ||||||
594 | |||||||
595 | // If the argument type is a class template specialization, we | ||||||
596 | // perform template argument deduction using its template | ||||||
597 | // arguments. | ||||||
598 | const RecordType *RecordArg = dyn_cast<RecordType>(Arg); | ||||||
599 | if (!RecordArg) { | ||||||
600 | Info.FirstArg = TemplateArgument(QualType(Param, 0)); | ||||||
601 | Info.SecondArg = TemplateArgument(Arg); | ||||||
602 | return Sema::TDK_NonDeducedMismatch; | ||||||
603 | } | ||||||
604 | |||||||
605 | ClassTemplateSpecializationDecl *SpecArg | ||||||
606 | = dyn_cast<ClassTemplateSpecializationDecl>(RecordArg->getDecl()); | ||||||
607 | if (!SpecArg) { | ||||||
608 | Info.FirstArg = TemplateArgument(QualType(Param, 0)); | ||||||
609 | Info.SecondArg = TemplateArgument(Arg); | ||||||
610 | return Sema::TDK_NonDeducedMismatch; | ||||||
611 | } | ||||||
612 | |||||||
613 | // Perform template argument deduction for the template name. | ||||||
614 | if (Sema::TemplateDeductionResult Result | ||||||
615 | = DeduceTemplateArguments(S, | ||||||
616 | TemplateParams, | ||||||
617 | Param->getTemplateName(), | ||||||
618 | TemplateName(SpecArg->getSpecializedTemplate()), | ||||||
619 | Info, Deduced)) | ||||||
620 | return Result; | ||||||
621 | |||||||
622 | // Perform template argument deduction for the template arguments. | ||||||
623 | return DeduceTemplateArguments(S, TemplateParams, Param->template_arguments(), | ||||||
624 | SpecArg->getTemplateArgs().asArray(), Info, | ||||||
625 | Deduced, /*NumberOfArgumentsMustMatch=*/true); | ||||||
626 | } | ||||||
627 | |||||||
628 | /// Determines whether the given type is an opaque type that | ||||||
629 | /// might be more qualified when instantiated. | ||||||
630 | static bool IsPossiblyOpaquelyQualifiedType(QualType T) { | ||||||
631 | switch (T->getTypeClass()) { | ||||||
632 | case Type::TypeOfExpr: | ||||||
633 | case Type::TypeOf: | ||||||
634 | case Type::DependentName: | ||||||
635 | case Type::Decltype: | ||||||
636 | case Type::UnresolvedUsing: | ||||||
637 | case Type::TemplateTypeParm: | ||||||
638 | return true; | ||||||
639 | |||||||
640 | case Type::ConstantArray: | ||||||
641 | case Type::IncompleteArray: | ||||||
642 | case Type::VariableArray: | ||||||
643 | case Type::DependentSizedArray: | ||||||
644 | return IsPossiblyOpaquelyQualifiedType( | ||||||
645 | cast<ArrayType>(T)->getElementType()); | ||||||
646 | |||||||
647 | default: | ||||||
648 | return false; | ||||||
649 | } | ||||||
650 | } | ||||||
651 | |||||||
652 | /// Helper function to build a TemplateParameter when we don't | ||||||
653 | /// know its type statically. | ||||||
654 | static TemplateParameter makeTemplateParameter(Decl *D) { | ||||||
655 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(D)) | ||||||
656 | return TemplateParameter(TTP); | ||||||
657 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) | ||||||
658 | return TemplateParameter(NTTP); | ||||||
659 | |||||||
660 | return TemplateParameter(cast<TemplateTemplateParmDecl>(D)); | ||||||
661 | } | ||||||
662 | |||||||
663 | /// A pack that we're currently deducing. | ||||||
664 | struct clang::DeducedPack { | ||||||
665 | // The index of the pack. | ||||||
666 | unsigned Index; | ||||||
667 | |||||||
668 | // The old value of the pack before we started deducing it. | ||||||
669 | DeducedTemplateArgument Saved; | ||||||
670 | |||||||
671 | // A deferred value of this pack from an inner deduction, that couldn't be | ||||||
672 | // deduced because this deduction hadn't happened yet. | ||||||
673 | DeducedTemplateArgument DeferredDeduction; | ||||||
674 | |||||||
675 | // The new value of the pack. | ||||||
676 | SmallVector<DeducedTemplateArgument, 4> New; | ||||||
677 | |||||||
678 | // The outer deduction for this pack, if any. | ||||||
679 | DeducedPack *Outer = nullptr; | ||||||
680 | |||||||
681 | DeducedPack(unsigned Index) : Index(Index) {} | ||||||
682 | }; | ||||||
683 | |||||||
684 | namespace { | ||||||
685 | |||||||
686 | /// A scope in which we're performing pack deduction. | ||||||
687 | class PackDeductionScope { | ||||||
688 | public: | ||||||
689 | /// Prepare to deduce the packs named within Pattern. | ||||||
690 | PackDeductionScope(Sema &S, TemplateParameterList *TemplateParams, | ||||||
691 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
692 | TemplateDeductionInfo &Info, TemplateArgument Pattern) | ||||||
693 | : S(S), TemplateParams(TemplateParams), Deduced(Deduced), Info(Info) { | ||||||
694 | unsigned NumNamedPacks = addPacks(Pattern); | ||||||
695 | finishConstruction(NumNamedPacks); | ||||||
696 | } | ||||||
697 | |||||||
698 | /// Prepare to directly deduce arguments of the parameter with index \p Index. | ||||||
699 | PackDeductionScope(Sema &S, TemplateParameterList *TemplateParams, | ||||||
700 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
701 | TemplateDeductionInfo &Info, unsigned Index) | ||||||
702 | : S(S), TemplateParams(TemplateParams), Deduced(Deduced), Info(Info) { | ||||||
703 | addPack(Index); | ||||||
704 | finishConstruction(1); | ||||||
705 | } | ||||||
706 | |||||||
707 | private: | ||||||
708 | void addPack(unsigned Index) { | ||||||
709 | // Save the deduced template argument for the parameter pack expanded | ||||||
710 | // by this pack expansion, then clear out the deduction. | ||||||
711 | DeducedPack Pack(Index); | ||||||
712 | Pack.Saved = Deduced[Index]; | ||||||
713 | Deduced[Index] = TemplateArgument(); | ||||||
714 | |||||||
715 | // FIXME: What if we encounter multiple packs with different numbers of | ||||||
716 | // pre-expanded expansions? (This should already have been diagnosed | ||||||
717 | // during substitution.) | ||||||
718 | if (Optional<unsigned> ExpandedPackExpansions = | ||||||
719 | getExpandedPackSize(TemplateParams->getParam(Index))) | ||||||
720 | FixedNumExpansions = ExpandedPackExpansions; | ||||||
721 | |||||||
722 | Packs.push_back(Pack); | ||||||
723 | } | ||||||
724 | |||||||
725 | unsigned addPacks(TemplateArgument Pattern) { | ||||||
726 | // Compute the set of template parameter indices that correspond to | ||||||
727 | // parameter packs expanded by the pack expansion. | ||||||
728 | llvm::SmallBitVector SawIndices(TemplateParams->size()); | ||||||
729 | llvm::SmallVector<TemplateArgument, 4> ExtraDeductions; | ||||||
730 | |||||||
731 | auto AddPack = [&](unsigned Index) { | ||||||
732 | if (SawIndices[Index]) | ||||||
733 | return; | ||||||
734 | SawIndices[Index] = true; | ||||||
735 | addPack(Index); | ||||||
736 | |||||||
737 | // Deducing a parameter pack that is a pack expansion also constrains the | ||||||
738 | // packs appearing in that parameter to have the same deduced arity. Also, | ||||||
739 | // in C++17 onwards, deducing a non-type template parameter deduces its | ||||||
740 | // type, so we need to collect the pending deduced values for those packs. | ||||||
741 | if (auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>( | ||||||
742 | TemplateParams->getParam(Index))) { | ||||||
743 | if (!NTTP->isExpandedParameterPack()) | ||||||
744 | if (auto *Expansion = dyn_cast<PackExpansionType>(NTTP->getType())) | ||||||
745 | ExtraDeductions.push_back(Expansion->getPattern()); | ||||||
746 | } | ||||||
747 | // FIXME: Also collect the unexpanded packs in any type and template | ||||||
748 | // parameter packs that are pack expansions. | ||||||
749 | }; | ||||||
750 | |||||||
751 | auto Collect = [&](TemplateArgument Pattern) { | ||||||
752 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; | ||||||
753 | S.collectUnexpandedParameterPacks(Pattern, Unexpanded); | ||||||
754 | for (unsigned I = 0, N = Unexpanded.size(); I != N; ++I) { | ||||||
755 | unsigned Depth, Index; | ||||||
756 | std::tie(Depth, Index) = getDepthAndIndex(Unexpanded[I]); | ||||||
757 | if (Depth == Info.getDeducedDepth()) | ||||||
758 | AddPack(Index); | ||||||
759 | } | ||||||
760 | }; | ||||||
761 | |||||||
762 | // Look for unexpanded packs in the pattern. | ||||||
763 | Collect(Pattern); | ||||||
764 | assert(!Packs.empty() && "Pack expansion without unexpanded packs?")((!Packs.empty() && "Pack expansion without unexpanded packs?" ) ? static_cast<void> (0) : __assert_fail ("!Packs.empty() && \"Pack expansion without unexpanded packs?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 764, __PRETTY_FUNCTION__)); | ||||||
765 | |||||||
766 | unsigned NumNamedPacks = Packs.size(); | ||||||
767 | |||||||
768 | // Also look for unexpanded packs that are indirectly deduced by deducing | ||||||
769 | // the sizes of the packs in this pattern. | ||||||
770 | while (!ExtraDeductions.empty()) | ||||||
771 | Collect(ExtraDeductions.pop_back_val()); | ||||||
772 | |||||||
773 | return NumNamedPacks; | ||||||
774 | } | ||||||
775 | |||||||
776 | void finishConstruction(unsigned NumNamedPacks) { | ||||||
777 | // Dig out the partially-substituted pack, if there is one. | ||||||
778 | const TemplateArgument *PartialPackArgs = nullptr; | ||||||
779 | unsigned NumPartialPackArgs = 0; | ||||||
780 | std::pair<unsigned, unsigned> PartialPackDepthIndex(-1u, -1u); | ||||||
781 | if (auto *Scope = S.CurrentInstantiationScope) | ||||||
782 | if (auto *Partial = Scope->getPartiallySubstitutedPack( | ||||||
783 | &PartialPackArgs, &NumPartialPackArgs)) | ||||||
784 | PartialPackDepthIndex = getDepthAndIndex(Partial); | ||||||
785 | |||||||
786 | // This pack expansion will have been partially or fully expanded if | ||||||
787 | // it only names explicitly-specified parameter packs (including the | ||||||
788 | // partially-substituted one, if any). | ||||||
789 | bool IsExpanded = true; | ||||||
790 | for (unsigned I = 0; I != NumNamedPacks; ++I) { | ||||||
791 | if (Packs[I].Index >= Info.getNumExplicitArgs()) { | ||||||
792 | IsExpanded = false; | ||||||
793 | IsPartiallyExpanded = false; | ||||||
794 | break; | ||||||
795 | } | ||||||
796 | if (PartialPackDepthIndex == | ||||||
797 | std::make_pair(Info.getDeducedDepth(), Packs[I].Index)) { | ||||||
798 | IsPartiallyExpanded = true; | ||||||
799 | } | ||||||
800 | } | ||||||
801 | |||||||
802 | // Skip over the pack elements that were expanded into separate arguments. | ||||||
803 | // If we partially expanded, this is the number of partial arguments. | ||||||
804 | if (IsPartiallyExpanded) | ||||||
805 | PackElements += NumPartialPackArgs; | ||||||
806 | else if (IsExpanded) | ||||||
807 | PackElements += *FixedNumExpansions; | ||||||
808 | |||||||
809 | for (auto &Pack : Packs) { | ||||||
810 | if (Info.PendingDeducedPacks.size() > Pack.Index) | ||||||
811 | Pack.Outer = Info.PendingDeducedPacks[Pack.Index]; | ||||||
812 | else | ||||||
813 | Info.PendingDeducedPacks.resize(Pack.Index + 1); | ||||||
814 | Info.PendingDeducedPacks[Pack.Index] = &Pack; | ||||||
815 | |||||||
816 | if (PartialPackDepthIndex == | ||||||
817 | std::make_pair(Info.getDeducedDepth(), Pack.Index)) { | ||||||
818 | Pack.New.append(PartialPackArgs, PartialPackArgs + NumPartialPackArgs); | ||||||
819 | // We pre-populate the deduced value of the partially-substituted | ||||||
820 | // pack with the specified value. This is not entirely correct: the | ||||||
821 | // value is supposed to have been substituted, not deduced, but the | ||||||
822 | // cases where this is observable require an exact type match anyway. | ||||||
823 | // | ||||||
824 | // FIXME: If we could represent a "depth i, index j, pack elem k" | ||||||
825 | // parameter, we could substitute the partially-substituted pack | ||||||
826 | // everywhere and avoid this. | ||||||
827 | if (!IsPartiallyExpanded) | ||||||
828 | Deduced[Pack.Index] = Pack.New[PackElements]; | ||||||
829 | } | ||||||
830 | } | ||||||
831 | } | ||||||
832 | |||||||
833 | public: | ||||||
834 | ~PackDeductionScope() { | ||||||
835 | for (auto &Pack : Packs) | ||||||
836 | Info.PendingDeducedPacks[Pack.Index] = Pack.Outer; | ||||||
837 | } | ||||||
838 | |||||||
839 | /// Determine whether this pack has already been partially expanded into a | ||||||
840 | /// sequence of (prior) function parameters / template arguments. | ||||||
841 | bool isPartiallyExpanded() { return IsPartiallyExpanded; } | ||||||
842 | |||||||
843 | /// Determine whether this pack expansion scope has a known, fixed arity. | ||||||
844 | /// This happens if it involves a pack from an outer template that has | ||||||
845 | /// (notionally) already been expanded. | ||||||
846 | bool hasFixedArity() { return FixedNumExpansions.hasValue(); } | ||||||
847 | |||||||
848 | /// Determine whether the next element of the argument is still part of this | ||||||
849 | /// pack. This is the case unless the pack is already expanded to a fixed | ||||||
850 | /// length. | ||||||
851 | bool hasNextElement() { | ||||||
852 | return !FixedNumExpansions || *FixedNumExpansions > PackElements; | ||||||
853 | } | ||||||
854 | |||||||
855 | /// Move to deducing the next element in each pack that is being deduced. | ||||||
856 | void nextPackElement() { | ||||||
857 | // Capture the deduced template arguments for each parameter pack expanded | ||||||
858 | // by this pack expansion, add them to the list of arguments we've deduced | ||||||
859 | // for that pack, then clear out the deduced argument. | ||||||
860 | for (auto &Pack : Packs) { | ||||||
861 | DeducedTemplateArgument &DeducedArg = Deduced[Pack.Index]; | ||||||
862 | if (!Pack.New.empty() || !DeducedArg.isNull()) { | ||||||
863 | while (Pack.New.size() < PackElements) | ||||||
864 | Pack.New.push_back(DeducedTemplateArgument()); | ||||||
865 | if (Pack.New.size() == PackElements) | ||||||
866 | Pack.New.push_back(DeducedArg); | ||||||
867 | else | ||||||
868 | Pack.New[PackElements] = DeducedArg; | ||||||
869 | DeducedArg = Pack.New.size() > PackElements + 1 | ||||||
870 | ? Pack.New[PackElements + 1] | ||||||
871 | : DeducedTemplateArgument(); | ||||||
872 | } | ||||||
873 | } | ||||||
874 | ++PackElements; | ||||||
875 | } | ||||||
876 | |||||||
877 | /// Finish template argument deduction for a set of argument packs, | ||||||
878 | /// producing the argument packs and checking for consistency with prior | ||||||
879 | /// deductions. | ||||||
880 | Sema::TemplateDeductionResult finish() { | ||||||
881 | // Build argument packs for each of the parameter packs expanded by this | ||||||
882 | // pack expansion. | ||||||
883 | for (auto &Pack : Packs) { | ||||||
884 | // Put back the old value for this pack. | ||||||
885 | Deduced[Pack.Index] = Pack.Saved; | ||||||
886 | |||||||
887 | // Always make sure the size of this pack is correct, even if we didn't | ||||||
888 | // deduce any values for it. | ||||||
889 | // | ||||||
890 | // FIXME: This isn't required by the normative wording, but substitution | ||||||
891 | // and post-substitution checking will always fail if the arity of any | ||||||
892 | // pack is not equal to the number of elements we processed. (Either that | ||||||
893 | // or something else has gone *very* wrong.) We're permitted to skip any | ||||||
894 | // hard errors from those follow-on steps by the intent (but not the | ||||||
895 | // wording) of C++ [temp.inst]p8: | ||||||
896 | // | ||||||
897 | // If the function selected by overload resolution can be determined | ||||||
898 | // without instantiating a class template definition, it is unspecified | ||||||
899 | // whether that instantiation actually takes place | ||||||
900 | Pack.New.resize(PackElements); | ||||||
901 | |||||||
902 | // Build or find a new value for this pack. | ||||||
903 | DeducedTemplateArgument NewPack; | ||||||
904 | if (Pack.New.empty()) { | ||||||
905 | // If we deduced an empty argument pack, create it now. | ||||||
906 | NewPack = DeducedTemplateArgument(TemplateArgument::getEmptyPack()); | ||||||
907 | } else { | ||||||
908 | TemplateArgument *ArgumentPack = | ||||||
909 | new (S.Context) TemplateArgument[Pack.New.size()]; | ||||||
910 | std::copy(Pack.New.begin(), Pack.New.end(), ArgumentPack); | ||||||
911 | NewPack = DeducedTemplateArgument( | ||||||
912 | TemplateArgument(llvm::makeArrayRef(ArgumentPack, Pack.New.size())), | ||||||
913 | // FIXME: This is wrong, it's possible that some pack elements are | ||||||
914 | // deduced from an array bound and others are not: | ||||||
915 | // template<typename ...T, T ...V> void g(const T (&...p)[V]); | ||||||
916 | // g({1, 2, 3}, {{}, {}}); | ||||||
917 | // ... should deduce T = {int, size_t (from array bound)}. | ||||||
918 | Pack.New[0].wasDeducedFromArrayBound()); | ||||||
919 | } | ||||||
920 | |||||||
921 | // Pick where we're going to put the merged pack. | ||||||
922 | DeducedTemplateArgument *Loc; | ||||||
923 | if (Pack.Outer) { | ||||||
924 | if (Pack.Outer->DeferredDeduction.isNull()) { | ||||||
925 | // Defer checking this pack until we have a complete pack to compare | ||||||
926 | // it against. | ||||||
927 | Pack.Outer->DeferredDeduction = NewPack; | ||||||
928 | continue; | ||||||
929 | } | ||||||
930 | Loc = &Pack.Outer->DeferredDeduction; | ||||||
931 | } else { | ||||||
932 | Loc = &Deduced[Pack.Index]; | ||||||
933 | } | ||||||
934 | |||||||
935 | // Check the new pack matches any previous value. | ||||||
936 | DeducedTemplateArgument OldPack = *Loc; | ||||||
937 | DeducedTemplateArgument Result = | ||||||
938 | checkDeducedTemplateArguments(S.Context, OldPack, NewPack); | ||||||
939 | |||||||
940 | // If we deferred a deduction of this pack, check that one now too. | ||||||
941 | if (!Result.isNull() && !Pack.DeferredDeduction.isNull()) { | ||||||
942 | OldPack = Result; | ||||||
943 | NewPack = Pack.DeferredDeduction; | ||||||
944 | Result = checkDeducedTemplateArguments(S.Context, OldPack, NewPack); | ||||||
945 | } | ||||||
946 | |||||||
947 | NamedDecl *Param = TemplateParams->getParam(Pack.Index); | ||||||
948 | if (Result.isNull()) { | ||||||
949 | Info.Param = makeTemplateParameter(Param); | ||||||
950 | Info.FirstArg = OldPack; | ||||||
951 | Info.SecondArg = NewPack; | ||||||
952 | return Sema::TDK_Inconsistent; | ||||||
953 | } | ||||||
954 | |||||||
955 | // If we have a pre-expanded pack and we didn't deduce enough elements | ||||||
956 | // for it, fail deduction. | ||||||
957 | if (Optional<unsigned> Expansions = getExpandedPackSize(Param)) { | ||||||
958 | if (*Expansions != PackElements) { | ||||||
959 | Info.Param = makeTemplateParameter(Param); | ||||||
960 | Info.FirstArg = Result; | ||||||
961 | return Sema::TDK_IncompletePack; | ||||||
962 | } | ||||||
963 | } | ||||||
964 | |||||||
965 | *Loc = Result; | ||||||
966 | } | ||||||
967 | |||||||
968 | return Sema::TDK_Success; | ||||||
969 | } | ||||||
970 | |||||||
971 | private: | ||||||
972 | Sema &S; | ||||||
973 | TemplateParameterList *TemplateParams; | ||||||
974 | SmallVectorImpl<DeducedTemplateArgument> &Deduced; | ||||||
975 | TemplateDeductionInfo &Info; | ||||||
976 | unsigned PackElements = 0; | ||||||
977 | bool IsPartiallyExpanded = false; | ||||||
978 | /// The number of expansions, if we have a fully-expanded pack in this scope. | ||||||
979 | Optional<unsigned> FixedNumExpansions; | ||||||
980 | |||||||
981 | SmallVector<DeducedPack, 2> Packs; | ||||||
982 | }; | ||||||
983 | |||||||
984 | } // namespace | ||||||
985 | |||||||
986 | /// Deduce the template arguments by comparing the list of parameter | ||||||
987 | /// types to the list of argument types, as in the parameter-type-lists of | ||||||
988 | /// function types (C++ [temp.deduct.type]p10). | ||||||
989 | /// | ||||||
990 | /// \param S The semantic analysis object within which we are deducing | ||||||
991 | /// | ||||||
992 | /// \param TemplateParams The template parameters that we are deducing | ||||||
993 | /// | ||||||
994 | /// \param Params The list of parameter types | ||||||
995 | /// | ||||||
996 | /// \param NumParams The number of types in \c Params | ||||||
997 | /// | ||||||
998 | /// \param Args The list of argument types | ||||||
999 | /// | ||||||
1000 | /// \param NumArgs The number of types in \c Args | ||||||
1001 | /// | ||||||
1002 | /// \param Info information about the template argument deduction itself | ||||||
1003 | /// | ||||||
1004 | /// \param Deduced the deduced template arguments | ||||||
1005 | /// | ||||||
1006 | /// \param TDF bitwise OR of the TemplateDeductionFlags bits that describe | ||||||
1007 | /// how template argument deduction is performed. | ||||||
1008 | /// | ||||||
1009 | /// \param PartialOrdering If true, we are performing template argument | ||||||
1010 | /// deduction for during partial ordering for a call | ||||||
1011 | /// (C++0x [temp.deduct.partial]). | ||||||
1012 | /// | ||||||
1013 | /// \returns the result of template argument deduction so far. Note that a | ||||||
1014 | /// "success" result means that template argument deduction has not yet failed, | ||||||
1015 | /// but it may still fail, later, for other reasons. | ||||||
1016 | static Sema::TemplateDeductionResult | ||||||
1017 | DeduceTemplateArguments(Sema &S, | ||||||
1018 | TemplateParameterList *TemplateParams, | ||||||
1019 | const QualType *Params, unsigned NumParams, | ||||||
1020 | const QualType *Args, unsigned NumArgs, | ||||||
1021 | TemplateDeductionInfo &Info, | ||||||
1022 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
1023 | unsigned TDF, | ||||||
1024 | bool PartialOrdering = false) { | ||||||
1025 | // C++0x [temp.deduct.type]p10: | ||||||
1026 | // Similarly, if P has a form that contains (T), then each parameter type | ||||||
1027 | // Pi of the respective parameter-type- list of P is compared with the | ||||||
1028 | // corresponding parameter type Ai of the corresponding parameter-type-list | ||||||
1029 | // of A. [...] | ||||||
1030 | unsigned ArgIdx = 0, ParamIdx = 0; | ||||||
1031 | for (; ParamIdx != NumParams; ++ParamIdx) { | ||||||
1032 | // Check argument types. | ||||||
1033 | const PackExpansionType *Expansion | ||||||
1034 | = dyn_cast<PackExpansionType>(Params[ParamIdx]); | ||||||
1035 | if (!Expansion) { | ||||||
1036 | // Simple case: compare the parameter and argument types at this point. | ||||||
1037 | |||||||
1038 | // Make sure we have an argument. | ||||||
1039 | if (ArgIdx >= NumArgs) | ||||||
1040 | return Sema::TDK_MiscellaneousDeductionFailure; | ||||||
1041 | |||||||
1042 | if (isa<PackExpansionType>(Args[ArgIdx])) { | ||||||
1043 | // C++0x [temp.deduct.type]p22: | ||||||
1044 | // If the original function parameter associated with A is a function | ||||||
1045 | // parameter pack and the function parameter associated with P is not | ||||||
1046 | // a function parameter pack, then template argument deduction fails. | ||||||
1047 | return Sema::TDK_MiscellaneousDeductionFailure; | ||||||
1048 | } | ||||||
1049 | |||||||
1050 | if (Sema::TemplateDeductionResult Result | ||||||
1051 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1052 | Params[ParamIdx], Args[ArgIdx], | ||||||
1053 | Info, Deduced, TDF, | ||||||
1054 | PartialOrdering)) | ||||||
1055 | return Result; | ||||||
1056 | |||||||
1057 | ++ArgIdx; | ||||||
1058 | continue; | ||||||
1059 | } | ||||||
1060 | |||||||
1061 | // C++0x [temp.deduct.type]p10: | ||||||
1062 | // If the parameter-declaration corresponding to Pi is a function | ||||||
1063 | // parameter pack, then the type of its declarator- id is compared with | ||||||
1064 | // each remaining parameter type in the parameter-type-list of A. Each | ||||||
1065 | // comparison deduces template arguments for subsequent positions in the | ||||||
1066 | // template parameter packs expanded by the function parameter pack. | ||||||
1067 | |||||||
1068 | QualType Pattern = Expansion->getPattern(); | ||||||
1069 | PackDeductionScope PackScope(S, TemplateParams, Deduced, Info, Pattern); | ||||||
1070 | |||||||
1071 | // A pack scope with fixed arity is not really a pack any more, so is not | ||||||
1072 | // a non-deduced context. | ||||||
1073 | if (ParamIdx + 1 == NumParams || PackScope.hasFixedArity()) { | ||||||
1074 | for (; ArgIdx < NumArgs && PackScope.hasNextElement(); ++ArgIdx) { | ||||||
1075 | // Deduce template arguments from the pattern. | ||||||
1076 | if (Sema::TemplateDeductionResult Result | ||||||
1077 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, Pattern, | ||||||
1078 | Args[ArgIdx], Info, Deduced, | ||||||
1079 | TDF, PartialOrdering)) | ||||||
1080 | return Result; | ||||||
1081 | |||||||
1082 | PackScope.nextPackElement(); | ||||||
1083 | } | ||||||
1084 | } else { | ||||||
1085 | // C++0x [temp.deduct.type]p5: | ||||||
1086 | // The non-deduced contexts are: | ||||||
1087 | // - A function parameter pack that does not occur at the end of the | ||||||
1088 | // parameter-declaration-clause. | ||||||
1089 | // | ||||||
1090 | // FIXME: There is no wording to say what we should do in this case. We | ||||||
1091 | // choose to resolve this by applying the same rule that is applied for a | ||||||
1092 | // function call: that is, deduce all contained packs to their | ||||||
1093 | // explicitly-specified values (or to <> if there is no such value). | ||||||
1094 | // | ||||||
1095 | // This is seemingly-arbitrarily different from the case of a template-id | ||||||
1096 | // with a non-trailing pack-expansion in its arguments, which renders the | ||||||
1097 | // entire template-argument-list a non-deduced context. | ||||||
1098 | |||||||
1099 | // If the parameter type contains an explicitly-specified pack that we | ||||||
1100 | // could not expand, skip the number of parameters notionally created | ||||||
1101 | // by the expansion. | ||||||
1102 | Optional<unsigned> NumExpansions = Expansion->getNumExpansions(); | ||||||
1103 | if (NumExpansions && !PackScope.isPartiallyExpanded()) { | ||||||
1104 | for (unsigned I = 0; I != *NumExpansions && ArgIdx < NumArgs; | ||||||
1105 | ++I, ++ArgIdx) | ||||||
1106 | PackScope.nextPackElement(); | ||||||
1107 | } | ||||||
1108 | } | ||||||
1109 | |||||||
1110 | // Build argument packs for each of the parameter packs expanded by this | ||||||
1111 | // pack expansion. | ||||||
1112 | if (auto Result = PackScope.finish()) | ||||||
1113 | return Result; | ||||||
1114 | } | ||||||
1115 | |||||||
1116 | // Make sure we don't have any extra arguments. | ||||||
1117 | if (ArgIdx < NumArgs) | ||||||
1118 | return Sema::TDK_MiscellaneousDeductionFailure; | ||||||
1119 | |||||||
1120 | return Sema::TDK_Success; | ||||||
1121 | } | ||||||
1122 | |||||||
1123 | /// Determine whether the parameter has qualifiers that the argument | ||||||
1124 | /// lacks. Put another way, determine whether there is no way to add | ||||||
1125 | /// a deduced set of qualifiers to the ParamType that would result in | ||||||
1126 | /// its qualifiers matching those of the ArgType. | ||||||
1127 | static bool hasInconsistentOrSupersetQualifiersOf(QualType ParamType, | ||||||
1128 | QualType ArgType) { | ||||||
1129 | Qualifiers ParamQs = ParamType.getQualifiers(); | ||||||
1130 | Qualifiers ArgQs = ArgType.getQualifiers(); | ||||||
1131 | |||||||
1132 | if (ParamQs == ArgQs) | ||||||
1133 | return false; | ||||||
1134 | |||||||
1135 | // Mismatched (but not missing) Objective-C GC attributes. | ||||||
1136 | if (ParamQs.getObjCGCAttr() != ArgQs.getObjCGCAttr() && | ||||||
1137 | ParamQs.hasObjCGCAttr()) | ||||||
1138 | return true; | ||||||
1139 | |||||||
1140 | // Mismatched (but not missing) address spaces. | ||||||
1141 | if (ParamQs.getAddressSpace() != ArgQs.getAddressSpace() && | ||||||
1142 | ParamQs.hasAddressSpace()) | ||||||
1143 | return true; | ||||||
1144 | |||||||
1145 | // Mismatched (but not missing) Objective-C lifetime qualifiers. | ||||||
1146 | if (ParamQs.getObjCLifetime() != ArgQs.getObjCLifetime() && | ||||||
1147 | ParamQs.hasObjCLifetime()) | ||||||
1148 | return true; | ||||||
1149 | |||||||
1150 | // CVR qualifiers inconsistent or a superset. | ||||||
1151 | return (ParamQs.getCVRQualifiers() & ~ArgQs.getCVRQualifiers()) != 0; | ||||||
1152 | } | ||||||
1153 | |||||||
1154 | /// Compare types for equality with respect to possibly compatible | ||||||
1155 | /// function types (noreturn adjustment, implicit calling conventions). If any | ||||||
1156 | /// of parameter and argument is not a function, just perform type comparison. | ||||||
1157 | /// | ||||||
1158 | /// \param Param the template parameter type. | ||||||
1159 | /// | ||||||
1160 | /// \param Arg the argument type. | ||||||
1161 | bool Sema::isSameOrCompatibleFunctionType(CanQualType Param, | ||||||
1162 | CanQualType Arg) { | ||||||
1163 | const FunctionType *ParamFunction = Param->getAs<FunctionType>(), | ||||||
1164 | *ArgFunction = Arg->getAs<FunctionType>(); | ||||||
1165 | |||||||
1166 | // Just compare if not functions. | ||||||
1167 | if (!ParamFunction || !ArgFunction) | ||||||
1168 | return Param == Arg; | ||||||
1169 | |||||||
1170 | // Noreturn and noexcept adjustment. | ||||||
1171 | QualType AdjustedParam; | ||||||
1172 | if (IsFunctionConversion(Param, Arg, AdjustedParam)) | ||||||
1173 | return Arg == Context.getCanonicalType(AdjustedParam); | ||||||
1174 | |||||||
1175 | // FIXME: Compatible calling conventions. | ||||||
1176 | |||||||
1177 | return Param == Arg; | ||||||
1178 | } | ||||||
1179 | |||||||
1180 | /// Get the index of the first template parameter that was originally from the | ||||||
1181 | /// innermost template-parameter-list. This is 0 except when we concatenate | ||||||
1182 | /// the template parameter lists of a class template and a constructor template | ||||||
1183 | /// when forming an implicit deduction guide. | ||||||
1184 | static unsigned getFirstInnerIndex(FunctionTemplateDecl *FTD) { | ||||||
1185 | auto *Guide = dyn_cast<CXXDeductionGuideDecl>(FTD->getTemplatedDecl()); | ||||||
1186 | if (!Guide || !Guide->isImplicit()) | ||||||
1187 | return 0; | ||||||
1188 | return Guide->getDeducedTemplate()->getTemplateParameters()->size(); | ||||||
1189 | } | ||||||
1190 | |||||||
1191 | /// Determine whether a type denotes a forwarding reference. | ||||||
1192 | static bool isForwardingReference(QualType Param, unsigned FirstInnerIndex) { | ||||||
1193 | // C++1z [temp.deduct.call]p3: | ||||||
1194 | // A forwarding reference is an rvalue reference to a cv-unqualified | ||||||
1195 | // template parameter that does not represent a template parameter of a | ||||||
1196 | // class template. | ||||||
1197 | if (auto *ParamRef = Param->getAs<RValueReferenceType>()) { | ||||||
1198 | if (ParamRef->getPointeeType().getQualifiers()) | ||||||
1199 | return false; | ||||||
1200 | auto *TypeParm = ParamRef->getPointeeType()->getAs<TemplateTypeParmType>(); | ||||||
1201 | return TypeParm && TypeParm->getIndex() >= FirstInnerIndex; | ||||||
1202 | } | ||||||
1203 | return false; | ||||||
1204 | } | ||||||
1205 | |||||||
1206 | /// Attempt to deduce the template arguments by checking the base types | ||||||
1207 | /// according to (C++20 [temp.deduct.call] p4b3. | ||||||
1208 | /// | ||||||
1209 | /// \param S the semantic analysis object within which we are deducing. | ||||||
1210 | /// | ||||||
1211 | /// \param RecordT the top level record object we are deducing against. | ||||||
1212 | /// | ||||||
1213 | /// \param TemplateParams the template parameters that we are deducing. | ||||||
1214 | /// | ||||||
1215 | /// \param SpecParam the template specialization parameter type. | ||||||
1216 | /// | ||||||
1217 | /// \param Info information about the template argument deduction itself. | ||||||
1218 | /// | ||||||
1219 | /// \param Deduced the deduced template arguments. | ||||||
1220 | /// | ||||||
1221 | /// \returns the result of template argument deduction with the bases. "invalid" | ||||||
1222 | /// means no matches, "success" found a single item, and the | ||||||
1223 | /// "MiscellaneousDeductionFailure" result happens when the match is ambiguous. | ||||||
1224 | static Sema::TemplateDeductionResult DeduceTemplateBases( | ||||||
1225 | Sema &S, const RecordType *RecordT, TemplateParameterList *TemplateParams, | ||||||
1226 | const TemplateSpecializationType *SpecParam, TemplateDeductionInfo &Info, | ||||||
1227 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
1228 | // C++14 [temp.deduct.call] p4b3: | ||||||
1229 | // If P is a class and P has the form simple-template-id, then the | ||||||
1230 | // transformed A can be a derived class of the deduced A. Likewise if | ||||||
1231 | // P is a pointer to a class of the form simple-template-id, the | ||||||
1232 | // transformed A can be a pointer to a derived class pointed to by the | ||||||
1233 | // deduced A. However, if there is a class C that is a (direct or | ||||||
1234 | // indirect) base class of D and derived (directly or indirectly) from a | ||||||
1235 | // class B and that would be a valid deduced A, the deduced A cannot be | ||||||
1236 | // B or pointer to B, respectively. | ||||||
1237 | // | ||||||
1238 | // These alternatives are considered only if type deduction would | ||||||
1239 | // otherwise fail. If they yield more than one possible deduced A, the | ||||||
1240 | // type deduction fails. | ||||||
1241 | |||||||
1242 | // Use a breadth-first search through the bases to collect the set of | ||||||
1243 | // successful matches. Visited contains the set of nodes we have already | ||||||
1244 | // visited, while ToVisit is our stack of records that we still need to | ||||||
1245 | // visit. Matches contains a list of matches that have yet to be | ||||||
1246 | // disqualified. | ||||||
1247 | llvm::SmallPtrSet<const RecordType *, 8> Visited; | ||||||
1248 | SmallVector<const RecordType *, 8> ToVisit; | ||||||
1249 | // We iterate over this later, so we have to use MapVector to ensure | ||||||
1250 | // determinism. | ||||||
1251 | llvm::MapVector<const RecordType *, SmallVector<DeducedTemplateArgument, 8>> | ||||||
1252 | Matches; | ||||||
1253 | |||||||
1254 | auto AddBases = [&Visited, &ToVisit](const RecordType *RT) { | ||||||
1255 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
1256 | for (const auto &Base : RD->bases()) { | ||||||
1257 | assert(Base.getType()->isRecordType() &&((Base.getType()->isRecordType() && "Base class that isn't a record?" ) ? static_cast<void> (0) : __assert_fail ("Base.getType()->isRecordType() && \"Base class that isn't a record?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1258, __PRETTY_FUNCTION__)) | ||||||
1258 | "Base class that isn't a record?")((Base.getType()->isRecordType() && "Base class that isn't a record?" ) ? static_cast<void> (0) : __assert_fail ("Base.getType()->isRecordType() && \"Base class that isn't a record?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1258, __PRETTY_FUNCTION__)); | ||||||
1259 | const RecordType *RT = Base.getType()->getAs<RecordType>(); | ||||||
1260 | if (Visited.insert(RT).second) | ||||||
1261 | ToVisit.push_back(Base.getType()->getAs<RecordType>()); | ||||||
1262 | } | ||||||
1263 | }; | ||||||
1264 | |||||||
1265 | // Set up the loop by adding all the bases. | ||||||
1266 | AddBases(RecordT); | ||||||
1267 | |||||||
1268 | // Search each path of bases until we either run into a successful match | ||||||
1269 | // (where all bases of it are invalid), or we run out of bases. | ||||||
1270 | while (!ToVisit.empty()) { | ||||||
1271 | const RecordType *NextT = ToVisit.pop_back_val(); | ||||||
1272 | |||||||
1273 | SmallVector<DeducedTemplateArgument, 8> DeducedCopy(Deduced.begin(), | ||||||
1274 | Deduced.end()); | ||||||
1275 | TemplateDeductionInfo BaseInfo(TemplateDeductionInfo::ForBase, Info); | ||||||
1276 | Sema::TemplateDeductionResult BaseResult = | ||||||
1277 | DeduceTemplateArguments(S, TemplateParams, SpecParam, | ||||||
1278 | QualType(NextT, 0), BaseInfo, DeducedCopy); | ||||||
1279 | |||||||
1280 | // If this was a successful deduction, add it to the list of matches, | ||||||
1281 | // otherwise we need to continue searching its bases. | ||||||
1282 | if (BaseResult == Sema::TDK_Success) | ||||||
1283 | Matches.insert({NextT, DeducedCopy}); | ||||||
1284 | else | ||||||
1285 | AddBases(NextT); | ||||||
1286 | } | ||||||
1287 | |||||||
1288 | // At this point, 'Matches' contains a list of seemingly valid bases, however | ||||||
1289 | // in the event that we have more than 1 match, it is possible that the base | ||||||
1290 | // of one of the matches might be disqualified for being a base of another | ||||||
1291 | // valid match. We can count on cyclical instantiations being invalid to | ||||||
1292 | // simplify the disqualifications. That is, if A & B are both matches, and B | ||||||
1293 | // inherits from A (disqualifying A), we know that A cannot inherit from B. | ||||||
1294 | if (Matches.size() > 1) { | ||||||
1295 | Visited.clear(); | ||||||
1296 | for (const auto &Match : Matches) | ||||||
1297 | AddBases(Match.first); | ||||||
1298 | |||||||
1299 | // We can give up once we have a single item (or have run out of things to | ||||||
1300 | // search) since cyclical inheritence isn't valid. | ||||||
1301 | while (Matches.size() > 1 && !ToVisit.empty()) { | ||||||
1302 | const RecordType *NextT = ToVisit.pop_back_val(); | ||||||
1303 | Matches.erase(NextT); | ||||||
1304 | |||||||
1305 | // Always add all bases, since the inheritence tree can contain | ||||||
1306 | // disqualifications for multiple matches. | ||||||
1307 | AddBases(NextT); | ||||||
1308 | } | ||||||
1309 | } | ||||||
1310 | |||||||
1311 | if (Matches.empty()) | ||||||
1312 | return Sema::TDK_Invalid; | ||||||
1313 | if (Matches.size() > 1) | ||||||
1314 | return Sema::TDK_MiscellaneousDeductionFailure; | ||||||
1315 | |||||||
1316 | std::swap(Matches.front().second, Deduced); | ||||||
1317 | return Sema::TDK_Success; | ||||||
1318 | } | ||||||
1319 | |||||||
1320 | /// Deduce the template arguments by comparing the parameter type and | ||||||
1321 | /// the argument type (C++ [temp.deduct.type]). | ||||||
1322 | /// | ||||||
1323 | /// \param S the semantic analysis object within which we are deducing | ||||||
1324 | /// | ||||||
1325 | /// \param TemplateParams the template parameters that we are deducing | ||||||
1326 | /// | ||||||
1327 | /// \param ParamIn the parameter type | ||||||
1328 | /// | ||||||
1329 | /// \param ArgIn the argument type | ||||||
1330 | /// | ||||||
1331 | /// \param Info information about the template argument deduction itself | ||||||
1332 | /// | ||||||
1333 | /// \param Deduced the deduced template arguments | ||||||
1334 | /// | ||||||
1335 | /// \param TDF bitwise OR of the TemplateDeductionFlags bits that describe | ||||||
1336 | /// how template argument deduction is performed. | ||||||
1337 | /// | ||||||
1338 | /// \param PartialOrdering Whether we're performing template argument deduction | ||||||
1339 | /// in the context of partial ordering (C++0x [temp.deduct.partial]). | ||||||
1340 | /// | ||||||
1341 | /// \returns the result of template argument deduction so far. Note that a | ||||||
1342 | /// "success" result means that template argument deduction has not yet failed, | ||||||
1343 | /// but it may still fail, later, for other reasons. | ||||||
1344 | static Sema::TemplateDeductionResult | ||||||
1345 | DeduceTemplateArgumentsByTypeMatch(Sema &S, | ||||||
1346 | TemplateParameterList *TemplateParams, | ||||||
1347 | QualType ParamIn, QualType ArgIn, | ||||||
1348 | TemplateDeductionInfo &Info, | ||||||
1349 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
1350 | unsigned TDF, | ||||||
1351 | bool PartialOrdering, | ||||||
1352 | bool DeducedFromArrayBound) { | ||||||
1353 | // We only want to look at the canonical types, since typedefs and | ||||||
1354 | // sugar are not part of template argument deduction. | ||||||
1355 | QualType Param = S.Context.getCanonicalType(ParamIn); | ||||||
1356 | QualType Arg = S.Context.getCanonicalType(ArgIn); | ||||||
1357 | |||||||
1358 | // If the argument type is a pack expansion, look at its pattern. | ||||||
1359 | // This isn't explicitly called out | ||||||
1360 | if (const PackExpansionType *ArgExpansion | ||||||
1361 | = dyn_cast<PackExpansionType>(Arg)) | ||||||
1362 | Arg = ArgExpansion->getPattern(); | ||||||
1363 | |||||||
1364 | if (PartialOrdering) { | ||||||
1365 | // C++11 [temp.deduct.partial]p5: | ||||||
1366 | // Before the partial ordering is done, certain transformations are | ||||||
1367 | // performed on the types used for partial ordering: | ||||||
1368 | // - If P is a reference type, P is replaced by the type referred to. | ||||||
1369 | const ReferenceType *ParamRef = Param->getAs<ReferenceType>(); | ||||||
1370 | if (ParamRef) | ||||||
1371 | Param = ParamRef->getPointeeType(); | ||||||
1372 | |||||||
1373 | // - If A is a reference type, A is replaced by the type referred to. | ||||||
1374 | const ReferenceType *ArgRef = Arg->getAs<ReferenceType>(); | ||||||
1375 | if (ArgRef) | ||||||
1376 | Arg = ArgRef->getPointeeType(); | ||||||
1377 | |||||||
1378 | if (ParamRef && ArgRef && S.Context.hasSameUnqualifiedType(Param, Arg)) { | ||||||
1379 | // C++11 [temp.deduct.partial]p9: | ||||||
1380 | // If, for a given type, deduction succeeds in both directions (i.e., | ||||||
1381 | // the types are identical after the transformations above) and both | ||||||
1382 | // P and A were reference types [...]: | ||||||
1383 | // - if [one type] was an lvalue reference and [the other type] was | ||||||
1384 | // not, [the other type] is not considered to be at least as | ||||||
1385 | // specialized as [the first type] | ||||||
1386 | // - if [one type] is more cv-qualified than [the other type], | ||||||
1387 | // [the other type] is not considered to be at least as specialized | ||||||
1388 | // as [the first type] | ||||||
1389 | // Objective-C ARC adds: | ||||||
1390 | // - [one type] has non-trivial lifetime, [the other type] has | ||||||
1391 | // __unsafe_unretained lifetime, and the types are otherwise | ||||||
1392 | // identical | ||||||
1393 | // | ||||||
1394 | // A is "considered to be at least as specialized" as P iff deduction | ||||||
1395 | // succeeds, so we model this as a deduction failure. Note that | ||||||
1396 | // [the first type] is P and [the other type] is A here; the standard | ||||||
1397 | // gets this backwards. | ||||||
1398 | Qualifiers ParamQuals = Param.getQualifiers(); | ||||||
1399 | Qualifiers ArgQuals = Arg.getQualifiers(); | ||||||
1400 | if ((ParamRef->isLValueReferenceType() && | ||||||
1401 | !ArgRef->isLValueReferenceType()) || | ||||||
1402 | ParamQuals.isStrictSupersetOf(ArgQuals) || | ||||||
1403 | (ParamQuals.hasNonTrivialObjCLifetime() && | ||||||
1404 | ArgQuals.getObjCLifetime() == Qualifiers::OCL_ExplicitNone && | ||||||
1405 | ParamQuals.withoutObjCLifetime() == | ||||||
1406 | ArgQuals.withoutObjCLifetime())) { | ||||||
1407 | Info.FirstArg = TemplateArgument(ParamIn); | ||||||
1408 | Info.SecondArg = TemplateArgument(ArgIn); | ||||||
1409 | return Sema::TDK_NonDeducedMismatch; | ||||||
1410 | } | ||||||
1411 | } | ||||||
1412 | |||||||
1413 | // C++11 [temp.deduct.partial]p7: | ||||||
1414 | // Remove any top-level cv-qualifiers: | ||||||
1415 | // - If P is a cv-qualified type, P is replaced by the cv-unqualified | ||||||
1416 | // version of P. | ||||||
1417 | Param = Param.getUnqualifiedType(); | ||||||
1418 | // - If A is a cv-qualified type, A is replaced by the cv-unqualified | ||||||
1419 | // version of A. | ||||||
1420 | Arg = Arg.getUnqualifiedType(); | ||||||
1421 | } else { | ||||||
1422 | // C++0x [temp.deduct.call]p4 bullet 1: | ||||||
1423 | // - If the original P is a reference type, the deduced A (i.e., the type | ||||||
1424 | // referred to by the reference) can be more cv-qualified than the | ||||||
1425 | // transformed A. | ||||||
1426 | if (TDF & TDF_ParamWithReferenceType) { | ||||||
1427 | Qualifiers Quals; | ||||||
1428 | QualType UnqualParam = S.Context.getUnqualifiedArrayType(Param, Quals); | ||||||
1429 | Quals.setCVRQualifiers(Quals.getCVRQualifiers() & | ||||||
1430 | Arg.getCVRQualifiers()); | ||||||
1431 | Param = S.Context.getQualifiedType(UnqualParam, Quals); | ||||||
1432 | } | ||||||
1433 | |||||||
1434 | if ((TDF & TDF_TopLevelParameterTypeList) && !Param->isFunctionType()) { | ||||||
1435 | // C++0x [temp.deduct.type]p10: | ||||||
1436 | // If P and A are function types that originated from deduction when | ||||||
1437 | // taking the address of a function template (14.8.2.2) or when deducing | ||||||
1438 | // template arguments from a function declaration (14.8.2.6) and Pi and | ||||||
1439 | // Ai are parameters of the top-level parameter-type-list of P and A, | ||||||
1440 | // respectively, Pi is adjusted if it is a forwarding reference and Ai | ||||||
1441 | // is an lvalue reference, in | ||||||
1442 | // which case the type of Pi is changed to be the template parameter | ||||||
1443 | // type (i.e., T&& is changed to simply T). [ Note: As a result, when | ||||||
1444 | // Pi is T&& and Ai is X&, the adjusted Pi will be T, causing T to be | ||||||
1445 | // deduced as X&. - end note ] | ||||||
1446 | TDF &= ~TDF_TopLevelParameterTypeList; | ||||||
1447 | if (isForwardingReference(Param, 0) && Arg->isLValueReferenceType()) | ||||||
1448 | Param = Param->getPointeeType(); | ||||||
1449 | } | ||||||
1450 | } | ||||||
1451 | |||||||
1452 | // C++ [temp.deduct.type]p9: | ||||||
1453 | // A template type argument T, a template template argument TT or a | ||||||
1454 | // template non-type argument i can be deduced if P and A have one of | ||||||
1455 | // the following forms: | ||||||
1456 | // | ||||||
1457 | // T | ||||||
1458 | // cv-list T | ||||||
1459 | if (const TemplateTypeParmType *TemplateTypeParm | ||||||
1460 | = Param->getAs<TemplateTypeParmType>()) { | ||||||
1461 | // Just skip any attempts to deduce from a placeholder type or a parameter | ||||||
1462 | // at a different depth. | ||||||
1463 | if (Arg->isPlaceholderType() || | ||||||
1464 | Info.getDeducedDepth() != TemplateTypeParm->getDepth()) | ||||||
1465 | return Sema::TDK_Success; | ||||||
1466 | |||||||
1467 | unsigned Index = TemplateTypeParm->getIndex(); | ||||||
1468 | bool RecanonicalizeArg = false; | ||||||
1469 | |||||||
1470 | // If the argument type is an array type, move the qualifiers up to the | ||||||
1471 | // top level, so they can be matched with the qualifiers on the parameter. | ||||||
1472 | if (isa<ArrayType>(Arg)) { | ||||||
1473 | Qualifiers Quals; | ||||||
1474 | Arg = S.Context.getUnqualifiedArrayType(Arg, Quals); | ||||||
1475 | if (Quals) { | ||||||
1476 | Arg = S.Context.getQualifiedType(Arg, Quals); | ||||||
1477 | RecanonicalizeArg = true; | ||||||
1478 | } | ||||||
1479 | } | ||||||
1480 | |||||||
1481 | // The argument type can not be less qualified than the parameter | ||||||
1482 | // type. | ||||||
1483 | if (!(TDF & TDF_IgnoreQualifiers) && | ||||||
1484 | hasInconsistentOrSupersetQualifiersOf(Param, Arg)) { | ||||||
1485 | Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); | ||||||
1486 | Info.FirstArg = TemplateArgument(Param); | ||||||
1487 | Info.SecondArg = TemplateArgument(Arg); | ||||||
1488 | return Sema::TDK_Underqualified; | ||||||
1489 | } | ||||||
1490 | |||||||
1491 | // Do not match a function type with a cv-qualified type. | ||||||
1492 | // http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1584 | ||||||
1493 | if (Arg->isFunctionType() && Param.hasQualifiers()) { | ||||||
1494 | return Sema::TDK_NonDeducedMismatch; | ||||||
1495 | } | ||||||
1496 | |||||||
1497 | assert(TemplateTypeParm->getDepth() == Info.getDeducedDepth() &&((TemplateTypeParm->getDepth() == Info.getDeducedDepth() && "saw template type parameter with wrong depth") ? static_cast <void> (0) : __assert_fail ("TemplateTypeParm->getDepth() == Info.getDeducedDepth() && \"saw template type parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1498, __PRETTY_FUNCTION__)) | ||||||
1498 | "saw template type parameter with wrong depth")((TemplateTypeParm->getDepth() == Info.getDeducedDepth() && "saw template type parameter with wrong depth") ? static_cast <void> (0) : __assert_fail ("TemplateTypeParm->getDepth() == Info.getDeducedDepth() && \"saw template type parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1498, __PRETTY_FUNCTION__)); | ||||||
1499 | assert(Arg != S.Context.OverloadTy && "Unresolved overloaded function")((Arg != S.Context.OverloadTy && "Unresolved overloaded function" ) ? static_cast<void> (0) : __assert_fail ("Arg != S.Context.OverloadTy && \"Unresolved overloaded function\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1499, __PRETTY_FUNCTION__)); | ||||||
1500 | QualType DeducedType = Arg; | ||||||
1501 | |||||||
1502 | // Remove any qualifiers on the parameter from the deduced type. | ||||||
1503 | // We checked the qualifiers for consistency above. | ||||||
1504 | Qualifiers DeducedQs = DeducedType.getQualifiers(); | ||||||
1505 | Qualifiers ParamQs = Param.getQualifiers(); | ||||||
1506 | DeducedQs.removeCVRQualifiers(ParamQs.getCVRQualifiers()); | ||||||
1507 | if (ParamQs.hasObjCGCAttr()) | ||||||
1508 | DeducedQs.removeObjCGCAttr(); | ||||||
1509 | if (ParamQs.hasAddressSpace()) | ||||||
1510 | DeducedQs.removeAddressSpace(); | ||||||
1511 | if (ParamQs.hasObjCLifetime()) | ||||||
1512 | DeducedQs.removeObjCLifetime(); | ||||||
1513 | |||||||
1514 | // Objective-C ARC: | ||||||
1515 | // If template deduction would produce a lifetime qualifier on a type | ||||||
1516 | // that is not a lifetime type, template argument deduction fails. | ||||||
1517 | if (ParamQs.hasObjCLifetime() && !DeducedType->isObjCLifetimeType() && | ||||||
1518 | !DeducedType->isDependentType()) { | ||||||
1519 | Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); | ||||||
1520 | Info.FirstArg = TemplateArgument(Param); | ||||||
1521 | Info.SecondArg = TemplateArgument(Arg); | ||||||
1522 | return Sema::TDK_Underqualified; | ||||||
1523 | } | ||||||
1524 | |||||||
1525 | // Objective-C ARC: | ||||||
1526 | // If template deduction would produce an argument type with lifetime type | ||||||
1527 | // but no lifetime qualifier, the __strong lifetime qualifier is inferred. | ||||||
1528 | if (S.getLangOpts().ObjCAutoRefCount && | ||||||
1529 | DeducedType->isObjCLifetimeType() && | ||||||
1530 | !DeducedQs.hasObjCLifetime()) | ||||||
1531 | DeducedQs.setObjCLifetime(Qualifiers::OCL_Strong); | ||||||
1532 | |||||||
1533 | DeducedType = S.Context.getQualifiedType(DeducedType.getUnqualifiedType(), | ||||||
1534 | DeducedQs); | ||||||
1535 | |||||||
1536 | if (RecanonicalizeArg) | ||||||
1537 | DeducedType = S.Context.getCanonicalType(DeducedType); | ||||||
1538 | |||||||
1539 | DeducedTemplateArgument NewDeduced(DeducedType, DeducedFromArrayBound); | ||||||
1540 | DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, | ||||||
1541 | Deduced[Index], | ||||||
1542 | NewDeduced); | ||||||
1543 | if (Result.isNull()) { | ||||||
1544 | Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); | ||||||
1545 | Info.FirstArg = Deduced[Index]; | ||||||
1546 | Info.SecondArg = NewDeduced; | ||||||
1547 | return Sema::TDK_Inconsistent; | ||||||
1548 | } | ||||||
1549 | |||||||
1550 | Deduced[Index] = Result; | ||||||
1551 | return Sema::TDK_Success; | ||||||
1552 | } | ||||||
1553 | |||||||
1554 | // Set up the template argument deduction information for a failure. | ||||||
1555 | Info.FirstArg = TemplateArgument(ParamIn); | ||||||
1556 | Info.SecondArg = TemplateArgument(ArgIn); | ||||||
1557 | |||||||
1558 | // If the parameter is an already-substituted template parameter | ||||||
1559 | // pack, do nothing: we don't know which of its arguments to look | ||||||
1560 | // at, so we have to wait until all of the parameter packs in this | ||||||
1561 | // expansion have arguments. | ||||||
1562 | if (isa<SubstTemplateTypeParmPackType>(Param)) | ||||||
1563 | return Sema::TDK_Success; | ||||||
1564 | |||||||
1565 | // Check the cv-qualifiers on the parameter and argument types. | ||||||
1566 | CanQualType CanParam = S.Context.getCanonicalType(Param); | ||||||
1567 | CanQualType CanArg = S.Context.getCanonicalType(Arg); | ||||||
1568 | if (!(TDF & TDF_IgnoreQualifiers)) { | ||||||
1569 | if (TDF & TDF_ParamWithReferenceType) { | ||||||
1570 | if (hasInconsistentOrSupersetQualifiersOf(Param, Arg)) | ||||||
1571 | return Sema::TDK_NonDeducedMismatch; | ||||||
1572 | } else if (TDF & TDF_ArgWithReferenceType) { | ||||||
1573 | // C++ [temp.deduct.conv]p4: | ||||||
1574 | // If the original A is a reference type, A can be more cv-qualified | ||||||
1575 | // than the deduced A | ||||||
1576 | if (!Arg.getQualifiers().compatiblyIncludes(Param.getQualifiers())) | ||||||
1577 | return Sema::TDK_NonDeducedMismatch; | ||||||
1578 | |||||||
1579 | // Strip out all extra qualifiers from the argument to figure out the | ||||||
1580 | // type we're converting to, prior to the qualification conversion. | ||||||
1581 | Qualifiers Quals; | ||||||
1582 | Arg = S.Context.getUnqualifiedArrayType(Arg, Quals); | ||||||
1583 | Arg = S.Context.getQualifiedType(Arg, Param.getQualifiers()); | ||||||
1584 | } else if (!IsPossiblyOpaquelyQualifiedType(Param)) { | ||||||
1585 | if (Param.getCVRQualifiers() != Arg.getCVRQualifiers()) | ||||||
1586 | return Sema::TDK_NonDeducedMismatch; | ||||||
1587 | } | ||||||
1588 | |||||||
1589 | // If the parameter type is not dependent, there is nothing to deduce. | ||||||
1590 | if (!Param->isDependentType()) { | ||||||
1591 | if (!(TDF & TDF_SkipNonDependent)) { | ||||||
1592 | bool NonDeduced = | ||||||
1593 | (TDF & TDF_AllowCompatibleFunctionType) | ||||||
1594 | ? !S.isSameOrCompatibleFunctionType(CanParam, CanArg) | ||||||
1595 | : Param != Arg; | ||||||
1596 | if (NonDeduced) { | ||||||
1597 | return Sema::TDK_NonDeducedMismatch; | ||||||
1598 | } | ||||||
1599 | } | ||||||
1600 | return Sema::TDK_Success; | ||||||
1601 | } | ||||||
1602 | } else if (!Param->isDependentType()) { | ||||||
1603 | if (!(TDF & TDF_SkipNonDependent)) { | ||||||
1604 | CanQualType ParamUnqualType = CanParam.getUnqualifiedType(), | ||||||
1605 | ArgUnqualType = CanArg.getUnqualifiedType(); | ||||||
1606 | bool Success = | ||||||
1607 | (TDF & TDF_AllowCompatibleFunctionType) | ||||||
1608 | ? S.isSameOrCompatibleFunctionType(ParamUnqualType, ArgUnqualType) | ||||||
1609 | : ParamUnqualType == ArgUnqualType; | ||||||
1610 | if (Success) | ||||||
1611 | return Sema::TDK_Success; | ||||||
1612 | } else { | ||||||
1613 | return Sema::TDK_Success; | ||||||
1614 | } | ||||||
1615 | } | ||||||
1616 | |||||||
1617 | switch (Param->getTypeClass()) { | ||||||
1618 | // Non-canonical types cannot appear here. | ||||||
1619 | #define NON_CANONICAL_TYPE(Class, Base) \ | ||||||
1620 | case Type::Class: llvm_unreachable("deducing non-canonical type: " #Class)::llvm::llvm_unreachable_internal("deducing non-canonical type: " #Class, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1620); | ||||||
1621 | #define TYPE(Class, Base) | ||||||
1622 | #include "clang/AST/TypeNodes.inc" | ||||||
1623 | |||||||
1624 | case Type::TemplateTypeParm: | ||||||
1625 | case Type::SubstTemplateTypeParmPack: | ||||||
1626 | llvm_unreachable("Type nodes handled above")::llvm::llvm_unreachable_internal("Type nodes handled above", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1626); | ||||||
1627 | |||||||
1628 | // These types cannot be dependent, so simply check whether the types are | ||||||
1629 | // the same. | ||||||
1630 | case Type::Builtin: | ||||||
1631 | case Type::VariableArray: | ||||||
1632 | case Type::Vector: | ||||||
1633 | case Type::FunctionNoProto: | ||||||
1634 | case Type::Record: | ||||||
1635 | case Type::Enum: | ||||||
1636 | case Type::ObjCObject: | ||||||
1637 | case Type::ObjCInterface: | ||||||
1638 | case Type::ObjCObjectPointer: | ||||||
1639 | case Type::ExtInt: | ||||||
1640 | if (TDF & TDF_SkipNonDependent) | ||||||
1641 | return Sema::TDK_Success; | ||||||
1642 | |||||||
1643 | if (TDF & TDF_IgnoreQualifiers) { | ||||||
1644 | Param = Param.getUnqualifiedType(); | ||||||
1645 | Arg = Arg.getUnqualifiedType(); | ||||||
1646 | } | ||||||
1647 | |||||||
1648 | return Param == Arg? Sema::TDK_Success : Sema::TDK_NonDeducedMismatch; | ||||||
1649 | |||||||
1650 | // _Complex T [placeholder extension] | ||||||
1651 | case Type::Complex: | ||||||
1652 | if (const ComplexType *ComplexArg = Arg->getAs<ComplexType>()) | ||||||
1653 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1654 | cast<ComplexType>(Param)->getElementType(), | ||||||
1655 | ComplexArg->getElementType(), | ||||||
1656 | Info, Deduced, TDF); | ||||||
1657 | |||||||
1658 | return Sema::TDK_NonDeducedMismatch; | ||||||
1659 | |||||||
1660 | // _Atomic T [extension] | ||||||
1661 | case Type::Atomic: | ||||||
1662 | if (const AtomicType *AtomicArg = Arg->getAs<AtomicType>()) | ||||||
1663 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1664 | cast<AtomicType>(Param)->getValueType(), | ||||||
1665 | AtomicArg->getValueType(), | ||||||
1666 | Info, Deduced, TDF); | ||||||
1667 | |||||||
1668 | return Sema::TDK_NonDeducedMismatch; | ||||||
1669 | |||||||
1670 | // T * | ||||||
1671 | case Type::Pointer: { | ||||||
1672 | QualType PointeeType; | ||||||
1673 | if (const PointerType *PointerArg = Arg->getAs<PointerType>()) { | ||||||
1674 | PointeeType = PointerArg->getPointeeType(); | ||||||
1675 | } else if (const ObjCObjectPointerType *PointerArg | ||||||
1676 | = Arg->getAs<ObjCObjectPointerType>()) { | ||||||
1677 | PointeeType = PointerArg->getPointeeType(); | ||||||
1678 | } else { | ||||||
1679 | return Sema::TDK_NonDeducedMismatch; | ||||||
1680 | } | ||||||
1681 | |||||||
1682 | unsigned SubTDF = TDF & (TDF_IgnoreQualifiers | TDF_DerivedClass); | ||||||
1683 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1684 | cast<PointerType>(Param)->getPointeeType(), | ||||||
1685 | PointeeType, | ||||||
1686 | Info, Deduced, SubTDF); | ||||||
1687 | } | ||||||
1688 | |||||||
1689 | // T & | ||||||
1690 | case Type::LValueReference: { | ||||||
1691 | const LValueReferenceType *ReferenceArg = | ||||||
1692 | Arg->getAs<LValueReferenceType>(); | ||||||
1693 | if (!ReferenceArg) | ||||||
1694 | return Sema::TDK_NonDeducedMismatch; | ||||||
1695 | |||||||
1696 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1697 | cast<LValueReferenceType>(Param)->getPointeeType(), | ||||||
1698 | ReferenceArg->getPointeeType(), Info, Deduced, 0); | ||||||
1699 | } | ||||||
1700 | |||||||
1701 | // T && [C++0x] | ||||||
1702 | case Type::RValueReference: { | ||||||
1703 | const RValueReferenceType *ReferenceArg = | ||||||
1704 | Arg->getAs<RValueReferenceType>(); | ||||||
1705 | if (!ReferenceArg) | ||||||
1706 | return Sema::TDK_NonDeducedMismatch; | ||||||
1707 | |||||||
1708 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1709 | cast<RValueReferenceType>(Param)->getPointeeType(), | ||||||
1710 | ReferenceArg->getPointeeType(), | ||||||
1711 | Info, Deduced, 0); | ||||||
1712 | } | ||||||
1713 | |||||||
1714 | // T [] (implied, but not stated explicitly) | ||||||
1715 | case Type::IncompleteArray: { | ||||||
1716 | const IncompleteArrayType *IncompleteArrayArg = | ||||||
1717 | S.Context.getAsIncompleteArrayType(Arg); | ||||||
1718 | if (!IncompleteArrayArg) | ||||||
1719 | return Sema::TDK_NonDeducedMismatch; | ||||||
1720 | |||||||
1721 | unsigned SubTDF = TDF & TDF_IgnoreQualifiers; | ||||||
1722 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1723 | S.Context.getAsIncompleteArrayType(Param)->getElementType(), | ||||||
1724 | IncompleteArrayArg->getElementType(), | ||||||
1725 | Info, Deduced, SubTDF); | ||||||
1726 | } | ||||||
1727 | |||||||
1728 | // T [integer-constant] | ||||||
1729 | case Type::ConstantArray: { | ||||||
1730 | const ConstantArrayType *ConstantArrayArg = | ||||||
1731 | S.Context.getAsConstantArrayType(Arg); | ||||||
1732 | if (!ConstantArrayArg) | ||||||
1733 | return Sema::TDK_NonDeducedMismatch; | ||||||
1734 | |||||||
1735 | const ConstantArrayType *ConstantArrayParm = | ||||||
1736 | S.Context.getAsConstantArrayType(Param); | ||||||
1737 | if (ConstantArrayArg->getSize() != ConstantArrayParm->getSize()) | ||||||
1738 | return Sema::TDK_NonDeducedMismatch; | ||||||
1739 | |||||||
1740 | unsigned SubTDF = TDF & TDF_IgnoreQualifiers; | ||||||
1741 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1742 | ConstantArrayParm->getElementType(), | ||||||
1743 | ConstantArrayArg->getElementType(), | ||||||
1744 | Info, Deduced, SubTDF); | ||||||
1745 | } | ||||||
1746 | |||||||
1747 | // type [i] | ||||||
1748 | case Type::DependentSizedArray: { | ||||||
1749 | const ArrayType *ArrayArg = S.Context.getAsArrayType(Arg); | ||||||
1750 | if (!ArrayArg) | ||||||
1751 | return Sema::TDK_NonDeducedMismatch; | ||||||
1752 | |||||||
1753 | unsigned SubTDF = TDF & TDF_IgnoreQualifiers; | ||||||
1754 | |||||||
1755 | // Check the element type of the arrays | ||||||
1756 | const DependentSizedArrayType *DependentArrayParm | ||||||
1757 | = S.Context.getAsDependentSizedArrayType(Param); | ||||||
1758 | if (Sema::TemplateDeductionResult Result | ||||||
1759 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1760 | DependentArrayParm->getElementType(), | ||||||
1761 | ArrayArg->getElementType(), | ||||||
1762 | Info, Deduced, SubTDF)) | ||||||
1763 | return Result; | ||||||
1764 | |||||||
1765 | // Determine the array bound is something we can deduce. | ||||||
1766 | const NonTypeTemplateParmDecl *NTTP | ||||||
1767 | = getDeducedParameterFromExpr(Info, DependentArrayParm->getSizeExpr()); | ||||||
1768 | if (!NTTP) | ||||||
1769 | return Sema::TDK_Success; | ||||||
1770 | |||||||
1771 | // We can perform template argument deduction for the given non-type | ||||||
1772 | // template parameter. | ||||||
1773 | assert(NTTP->getDepth() == Info.getDeducedDepth() &&((NTTP->getDepth() == Info.getDeducedDepth() && "saw non-type template parameter with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"saw non-type template parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1774, __PRETTY_FUNCTION__)) | ||||||
1774 | "saw non-type template parameter with wrong depth")((NTTP->getDepth() == Info.getDeducedDepth() && "saw non-type template parameter with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"saw non-type template parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1774, __PRETTY_FUNCTION__)); | ||||||
1775 | if (const ConstantArrayType *ConstantArrayArg | ||||||
1776 | = dyn_cast<ConstantArrayType>(ArrayArg)) { | ||||||
1777 | llvm::APSInt Size(ConstantArrayArg->getSize()); | ||||||
1778 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, Size, | ||||||
1779 | S.Context.getSizeType(), | ||||||
1780 | /*ArrayBound=*/true, | ||||||
1781 | Info, Deduced); | ||||||
1782 | } | ||||||
1783 | if (const DependentSizedArrayType *DependentArrayArg | ||||||
1784 | = dyn_cast<DependentSizedArrayType>(ArrayArg)) | ||||||
1785 | if (DependentArrayArg->getSizeExpr()) | ||||||
1786 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
1787 | DependentArrayArg->getSizeExpr(), | ||||||
1788 | Info, Deduced); | ||||||
1789 | |||||||
1790 | // Incomplete type does not match a dependently-sized array type | ||||||
1791 | return Sema::TDK_NonDeducedMismatch; | ||||||
1792 | } | ||||||
1793 | |||||||
1794 | // type(*)(T) | ||||||
1795 | // T(*)() | ||||||
1796 | // T(*)(T) | ||||||
1797 | case Type::FunctionProto: { | ||||||
1798 | unsigned SubTDF = TDF & TDF_TopLevelParameterTypeList; | ||||||
1799 | const FunctionProtoType *FunctionProtoArg = | ||||||
1800 | dyn_cast<FunctionProtoType>(Arg); | ||||||
1801 | if (!FunctionProtoArg) | ||||||
1802 | return Sema::TDK_NonDeducedMismatch; | ||||||
1803 | |||||||
1804 | const FunctionProtoType *FunctionProtoParam = | ||||||
1805 | cast<FunctionProtoType>(Param); | ||||||
1806 | |||||||
1807 | if (FunctionProtoParam->getMethodQuals() | ||||||
1808 | != FunctionProtoArg->getMethodQuals() || | ||||||
1809 | FunctionProtoParam->getRefQualifier() | ||||||
1810 | != FunctionProtoArg->getRefQualifier() || | ||||||
1811 | FunctionProtoParam->isVariadic() != FunctionProtoArg->isVariadic()) | ||||||
1812 | return Sema::TDK_NonDeducedMismatch; | ||||||
1813 | |||||||
1814 | // Check return types. | ||||||
1815 | if (auto Result = DeduceTemplateArgumentsByTypeMatch( | ||||||
1816 | S, TemplateParams, FunctionProtoParam->getReturnType(), | ||||||
1817 | FunctionProtoArg->getReturnType(), Info, Deduced, 0)) | ||||||
1818 | return Result; | ||||||
1819 | |||||||
1820 | // Check parameter types. | ||||||
1821 | if (auto Result = DeduceTemplateArguments( | ||||||
1822 | S, TemplateParams, FunctionProtoParam->param_type_begin(), | ||||||
1823 | FunctionProtoParam->getNumParams(), | ||||||
1824 | FunctionProtoArg->param_type_begin(), | ||||||
1825 | FunctionProtoArg->getNumParams(), Info, Deduced, SubTDF)) | ||||||
1826 | return Result; | ||||||
1827 | |||||||
1828 | if (TDF & TDF_AllowCompatibleFunctionType) | ||||||
1829 | return Sema::TDK_Success; | ||||||
1830 | |||||||
1831 | // FIXME: Per core-2016/10/1019 (no corresponding core issue yet), permit | ||||||
1832 | // deducing through the noexcept-specifier if it's part of the canonical | ||||||
1833 | // type. libstdc++ relies on this. | ||||||
1834 | Expr *NoexceptExpr = FunctionProtoParam->getNoexceptExpr(); | ||||||
1835 | if (const NonTypeTemplateParmDecl *NTTP = | ||||||
1836 | NoexceptExpr ? getDeducedParameterFromExpr(Info, NoexceptExpr) | ||||||
1837 | : nullptr) { | ||||||
1838 | assert(NTTP->getDepth() == Info.getDeducedDepth() &&((NTTP->getDepth() == Info.getDeducedDepth() && "saw non-type template parameter with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"saw non-type template parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1839, __PRETTY_FUNCTION__)) | ||||||
1839 | "saw non-type template parameter with wrong depth")((NTTP->getDepth() == Info.getDeducedDepth() && "saw non-type template parameter with wrong depth" ) ? static_cast<void> (0) : __assert_fail ("NTTP->getDepth() == Info.getDeducedDepth() && \"saw non-type template parameter with wrong depth\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1839, __PRETTY_FUNCTION__)); | ||||||
1840 | |||||||
1841 | llvm::APSInt Noexcept(1); | ||||||
1842 | switch (FunctionProtoArg->canThrow()) { | ||||||
1843 | case CT_Cannot: | ||||||
1844 | Noexcept = 1; | ||||||
1845 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
1846 | |||||||
1847 | case CT_Can: | ||||||
1848 | // We give E in noexcept(E) the "deduced from array bound" treatment. | ||||||
1849 | // FIXME: Should we? | ||||||
1850 | return DeduceNonTypeTemplateArgument( | ||||||
1851 | S, TemplateParams, NTTP, Noexcept, S.Context.BoolTy, | ||||||
1852 | /*ArrayBound*/true, Info, Deduced); | ||||||
1853 | |||||||
1854 | case CT_Dependent: | ||||||
1855 | if (Expr *ArgNoexceptExpr = FunctionProtoArg->getNoexceptExpr()) | ||||||
1856 | return DeduceNonTypeTemplateArgument( | ||||||
1857 | S, TemplateParams, NTTP, ArgNoexceptExpr, Info, Deduced); | ||||||
1858 | // Can't deduce anything from throw(T...). | ||||||
1859 | break; | ||||||
1860 | } | ||||||
1861 | } | ||||||
1862 | // FIXME: Detect non-deduced exception specification mismatches? | ||||||
1863 | // | ||||||
1864 | // Careful about [temp.deduct.call] and [temp.deduct.conv], which allow | ||||||
1865 | // top-level differences in noexcept-specifications. | ||||||
1866 | |||||||
1867 | return Sema::TDK_Success; | ||||||
1868 | } | ||||||
1869 | |||||||
1870 | case Type::InjectedClassName: | ||||||
1871 | // Treat a template's injected-class-name as if the template | ||||||
1872 | // specialization type had been used. | ||||||
1873 | Param = cast<InjectedClassNameType>(Param) | ||||||
1874 | ->getInjectedSpecializationType(); | ||||||
1875 | assert(isa<TemplateSpecializationType>(Param) &&((isa<TemplateSpecializationType>(Param) && "injected class name is not a template specialization type" ) ? static_cast<void> (0) : __assert_fail ("isa<TemplateSpecializationType>(Param) && \"injected class name is not a template specialization type\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1876, __PRETTY_FUNCTION__)) | ||||||
1876 | "injected class name is not a template specialization type")((isa<TemplateSpecializationType>(Param) && "injected class name is not a template specialization type" ) ? static_cast<void> (0) : __assert_fail ("isa<TemplateSpecializationType>(Param) && \"injected class name is not a template specialization type\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 1876, __PRETTY_FUNCTION__)); | ||||||
1877 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
1878 | |||||||
1879 | // template-name<T> (where template-name refers to a class template) | ||||||
1880 | // template-name<i> | ||||||
1881 | // TT<T> | ||||||
1882 | // TT<i> | ||||||
1883 | // TT<> | ||||||
1884 | case Type::TemplateSpecialization: { | ||||||
1885 | const TemplateSpecializationType *SpecParam = | ||||||
1886 | cast<TemplateSpecializationType>(Param); | ||||||
1887 | |||||||
1888 | // When Arg cannot be a derived class, we can just try to deduce template | ||||||
1889 | // arguments from the template-id. | ||||||
1890 | const RecordType *RecordT = Arg->getAs<RecordType>(); | ||||||
1891 | if (!(TDF & TDF_DerivedClass) || !RecordT) | ||||||
1892 | return DeduceTemplateArguments(S, TemplateParams, SpecParam, Arg, Info, | ||||||
1893 | Deduced); | ||||||
1894 | |||||||
1895 | SmallVector<DeducedTemplateArgument, 8> DeducedOrig(Deduced.begin(), | ||||||
1896 | Deduced.end()); | ||||||
1897 | |||||||
1898 | Sema::TemplateDeductionResult Result = DeduceTemplateArguments( | ||||||
1899 | S, TemplateParams, SpecParam, Arg, Info, Deduced); | ||||||
1900 | |||||||
1901 | if (Result == Sema::TDK_Success) | ||||||
1902 | return Result; | ||||||
1903 | |||||||
1904 | // We cannot inspect base classes as part of deduction when the type | ||||||
1905 | // is incomplete, so either instantiate any templates necessary to | ||||||
1906 | // complete the type, or skip over it if it cannot be completed. | ||||||
1907 | if (!S.isCompleteType(Info.getLocation(), Arg)) | ||||||
1908 | return Result; | ||||||
1909 | |||||||
1910 | // Reset the incorrectly deduced argument from above. | ||||||
1911 | Deduced = DeducedOrig; | ||||||
1912 | |||||||
1913 | // Check bases according to C++14 [temp.deduct.call] p4b3: | ||||||
1914 | Sema::TemplateDeductionResult BaseResult = DeduceTemplateBases( | ||||||
1915 | S, RecordT, TemplateParams, SpecParam, Info, Deduced); | ||||||
1916 | |||||||
1917 | if (BaseResult != Sema::TDK_Invalid) | ||||||
1918 | return BaseResult; | ||||||
1919 | return Result; | ||||||
1920 | } | ||||||
1921 | |||||||
1922 | // T type::* | ||||||
1923 | // T T::* | ||||||
1924 | // T (type::*)() | ||||||
1925 | // type (T::*)() | ||||||
1926 | // type (type::*)(T) | ||||||
1927 | // type (T::*)(T) | ||||||
1928 | // T (type::*)(T) | ||||||
1929 | // T (T::*)() | ||||||
1930 | // T (T::*)(T) | ||||||
1931 | case Type::MemberPointer: { | ||||||
1932 | const MemberPointerType *MemPtrParam = cast<MemberPointerType>(Param); | ||||||
1933 | const MemberPointerType *MemPtrArg = dyn_cast<MemberPointerType>(Arg); | ||||||
1934 | if (!MemPtrArg) | ||||||
1935 | return Sema::TDK_NonDeducedMismatch; | ||||||
1936 | |||||||
1937 | QualType ParamPointeeType = MemPtrParam->getPointeeType(); | ||||||
1938 | if (ParamPointeeType->isFunctionType()) | ||||||
1939 | S.adjustMemberFunctionCC(ParamPointeeType, /*IsStatic=*/true, | ||||||
1940 | /*IsCtorOrDtor=*/false, Info.getLocation()); | ||||||
1941 | QualType ArgPointeeType = MemPtrArg->getPointeeType(); | ||||||
1942 | if (ArgPointeeType->isFunctionType()) | ||||||
1943 | S.adjustMemberFunctionCC(ArgPointeeType, /*IsStatic=*/true, | ||||||
1944 | /*IsCtorOrDtor=*/false, Info.getLocation()); | ||||||
1945 | |||||||
1946 | if (Sema::TemplateDeductionResult Result | ||||||
1947 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1948 | ParamPointeeType, | ||||||
1949 | ArgPointeeType, | ||||||
1950 | Info, Deduced, | ||||||
1951 | TDF & TDF_IgnoreQualifiers)) | ||||||
1952 | return Result; | ||||||
1953 | |||||||
1954 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1955 | QualType(MemPtrParam->getClass(), 0), | ||||||
1956 | QualType(MemPtrArg->getClass(), 0), | ||||||
1957 | Info, Deduced, | ||||||
1958 | TDF & TDF_IgnoreQualifiers); | ||||||
1959 | } | ||||||
1960 | |||||||
1961 | // (clang extension) | ||||||
1962 | // | ||||||
1963 | // type(^)(T) | ||||||
1964 | // T(^)() | ||||||
1965 | // T(^)(T) | ||||||
1966 | case Type::BlockPointer: { | ||||||
1967 | const BlockPointerType *BlockPtrParam = cast<BlockPointerType>(Param); | ||||||
1968 | const BlockPointerType *BlockPtrArg = dyn_cast<BlockPointerType>(Arg); | ||||||
1969 | |||||||
1970 | if (!BlockPtrArg) | ||||||
1971 | return Sema::TDK_NonDeducedMismatch; | ||||||
1972 | |||||||
1973 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1974 | BlockPtrParam->getPointeeType(), | ||||||
1975 | BlockPtrArg->getPointeeType(), | ||||||
1976 | Info, Deduced, 0); | ||||||
1977 | } | ||||||
1978 | |||||||
1979 | // (clang extension) | ||||||
1980 | // | ||||||
1981 | // T __attribute__(((ext_vector_type(<integral constant>)))) | ||||||
1982 | case Type::ExtVector: { | ||||||
1983 | const ExtVectorType *VectorParam = cast<ExtVectorType>(Param); | ||||||
1984 | if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) { | ||||||
1985 | // Make sure that the vectors have the same number of elements. | ||||||
1986 | if (VectorParam->getNumElements() != VectorArg->getNumElements()) | ||||||
1987 | return Sema::TDK_NonDeducedMismatch; | ||||||
1988 | |||||||
1989 | // Perform deduction on the element types. | ||||||
1990 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
1991 | VectorParam->getElementType(), | ||||||
1992 | VectorArg->getElementType(), | ||||||
1993 | Info, Deduced, TDF); | ||||||
1994 | } | ||||||
1995 | |||||||
1996 | if (const DependentSizedExtVectorType *VectorArg | ||||||
1997 | = dyn_cast<DependentSizedExtVectorType>(Arg)) { | ||||||
1998 | // We can't check the number of elements, since the argument has a | ||||||
1999 | // dependent number of elements. This can only occur during partial | ||||||
2000 | // ordering. | ||||||
2001 | |||||||
2002 | // Perform deduction on the element types. | ||||||
2003 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
2004 | VectorParam->getElementType(), | ||||||
2005 | VectorArg->getElementType(), | ||||||
2006 | Info, Deduced, TDF); | ||||||
2007 | } | ||||||
2008 | |||||||
2009 | return Sema::TDK_NonDeducedMismatch; | ||||||
2010 | } | ||||||
2011 | |||||||
2012 | case Type::DependentVector: { | ||||||
2013 | const auto *VectorParam = cast<DependentVectorType>(Param); | ||||||
2014 | |||||||
2015 | if (const auto *VectorArg = dyn_cast<VectorType>(Arg)) { | ||||||
2016 | // Perform deduction on the element types. | ||||||
2017 | if (Sema::TemplateDeductionResult Result = | ||||||
2018 | DeduceTemplateArgumentsByTypeMatch( | ||||||
2019 | S, TemplateParams, VectorParam->getElementType(), | ||||||
2020 | VectorArg->getElementType(), Info, Deduced, TDF)) | ||||||
2021 | return Result; | ||||||
2022 | |||||||
2023 | // Perform deduction on the vector size, if we can. | ||||||
2024 | const NonTypeTemplateParmDecl *NTTP = | ||||||
2025 | getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr()); | ||||||
2026 | if (!NTTP) | ||||||
2027 | return Sema::TDK_Success; | ||||||
2028 | |||||||
2029 | llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false); | ||||||
2030 | ArgSize = VectorArg->getNumElements(); | ||||||
2031 | // Note that we use the "array bound" rules here; just like in that | ||||||
2032 | // case, we don't have any particular type for the vector size, but | ||||||
2033 | // we can provide one if necessary. | ||||||
2034 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, ArgSize, | ||||||
2035 | S.Context.UnsignedIntTy, true, | ||||||
2036 | Info, Deduced); | ||||||
2037 | } | ||||||
2038 | |||||||
2039 | if (const auto *VectorArg = dyn_cast<DependentVectorType>(Arg)) { | ||||||
2040 | // Perform deduction on the element types. | ||||||
2041 | if (Sema::TemplateDeductionResult Result = | ||||||
2042 | DeduceTemplateArgumentsByTypeMatch( | ||||||
2043 | S, TemplateParams, VectorParam->getElementType(), | ||||||
2044 | VectorArg->getElementType(), Info, Deduced, TDF)) | ||||||
2045 | return Result; | ||||||
2046 | |||||||
2047 | // Perform deduction on the vector size, if we can. | ||||||
2048 | const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr( | ||||||
2049 | Info, VectorParam->getSizeExpr()); | ||||||
2050 | if (!NTTP) | ||||||
2051 | return Sema::TDK_Success; | ||||||
2052 | |||||||
2053 | return DeduceNonTypeTemplateArgument( | ||||||
2054 | S, TemplateParams, NTTP, VectorArg->getSizeExpr(), Info, Deduced); | ||||||
2055 | } | ||||||
2056 | |||||||
2057 | return Sema::TDK_NonDeducedMismatch; | ||||||
2058 | } | ||||||
2059 | |||||||
2060 | // (clang extension) | ||||||
2061 | // | ||||||
2062 | // T __attribute__(((ext_vector_type(N)))) | ||||||
2063 | case Type::DependentSizedExtVector: { | ||||||
2064 | const DependentSizedExtVectorType *VectorParam | ||||||
2065 | = cast<DependentSizedExtVectorType>(Param); | ||||||
2066 | |||||||
2067 | if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) { | ||||||
2068 | // Perform deduction on the element types. | ||||||
2069 | if (Sema::TemplateDeductionResult Result | ||||||
2070 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
2071 | VectorParam->getElementType(), | ||||||
2072 | VectorArg->getElementType(), | ||||||
2073 | Info, Deduced, TDF)) | ||||||
2074 | return Result; | ||||||
2075 | |||||||
2076 | // Perform deduction on the vector size, if we can. | ||||||
2077 | const NonTypeTemplateParmDecl *NTTP = | ||||||
2078 | getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr()); | ||||||
2079 | if (!NTTP) | ||||||
2080 | return Sema::TDK_Success; | ||||||
2081 | |||||||
2082 | llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false); | ||||||
2083 | ArgSize = VectorArg->getNumElements(); | ||||||
2084 | // Note that we use the "array bound" rules here; just like in that | ||||||
2085 | // case, we don't have any particular type for the vector size, but | ||||||
2086 | // we can provide one if necessary. | ||||||
2087 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, ArgSize, | ||||||
2088 | S.Context.IntTy, true, Info, | ||||||
2089 | Deduced); | ||||||
2090 | } | ||||||
2091 | |||||||
2092 | if (const DependentSizedExtVectorType *VectorArg | ||||||
2093 | = dyn_cast<DependentSizedExtVectorType>(Arg)) { | ||||||
2094 | // Perform deduction on the element types. | ||||||
2095 | if (Sema::TemplateDeductionResult Result | ||||||
2096 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
2097 | VectorParam->getElementType(), | ||||||
2098 | VectorArg->getElementType(), | ||||||
2099 | Info, Deduced, TDF)) | ||||||
2100 | return Result; | ||||||
2101 | |||||||
2102 | // Perform deduction on the vector size, if we can. | ||||||
2103 | const NonTypeTemplateParmDecl *NTTP = | ||||||
2104 | getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr()); | ||||||
2105 | if (!NTTP) | ||||||
2106 | return Sema::TDK_Success; | ||||||
2107 | |||||||
2108 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
2109 | VectorArg->getSizeExpr(), | ||||||
2110 | Info, Deduced); | ||||||
2111 | } | ||||||
2112 | |||||||
2113 | return Sema::TDK_NonDeducedMismatch; | ||||||
2114 | } | ||||||
2115 | |||||||
2116 | // (clang extension) | ||||||
2117 | // | ||||||
2118 | // T __attribute__((matrix_type(<integral constant>, | ||||||
2119 | // <integral constant>))) | ||||||
2120 | case Type::ConstantMatrix: { | ||||||
2121 | const ConstantMatrixType *MatrixArg = dyn_cast<ConstantMatrixType>(Arg); | ||||||
2122 | if (!MatrixArg) | ||||||
2123 | return Sema::TDK_NonDeducedMismatch; | ||||||
2124 | |||||||
2125 | const ConstantMatrixType *MatrixParam = cast<ConstantMatrixType>(Param); | ||||||
2126 | // Check that the dimensions are the same | ||||||
2127 | if (MatrixParam->getNumRows() != MatrixArg->getNumRows() || | ||||||
2128 | MatrixParam->getNumColumns() != MatrixArg->getNumColumns()) { | ||||||
2129 | return Sema::TDK_NonDeducedMismatch; | ||||||
2130 | } | ||||||
2131 | // Perform deduction on element types. | ||||||
2132 | return DeduceTemplateArgumentsByTypeMatch( | ||||||
2133 | S, TemplateParams, MatrixParam->getElementType(), | ||||||
2134 | MatrixArg->getElementType(), Info, Deduced, TDF); | ||||||
2135 | } | ||||||
2136 | |||||||
2137 | case Type::DependentSizedMatrix: { | ||||||
2138 | const MatrixType *MatrixArg = dyn_cast<MatrixType>(Arg); | ||||||
2139 | if (!MatrixArg) | ||||||
2140 | return Sema::TDK_NonDeducedMismatch; | ||||||
2141 | |||||||
2142 | // Check the element type of the matrixes. | ||||||
2143 | const DependentSizedMatrixType *MatrixParam = | ||||||
2144 | cast<DependentSizedMatrixType>(Param); | ||||||
2145 | if (Sema::TemplateDeductionResult Result = | ||||||
2146 | DeduceTemplateArgumentsByTypeMatch( | ||||||
2147 | S, TemplateParams, MatrixParam->getElementType(), | ||||||
2148 | MatrixArg->getElementType(), Info, Deduced, TDF)) | ||||||
2149 | return Result; | ||||||
2150 | |||||||
2151 | // Try to deduce a matrix dimension. | ||||||
2152 | auto DeduceMatrixArg = | ||||||
2153 | [&S, &Info, &Deduced, &TemplateParams]( | ||||||
2154 | Expr *ParamExpr, const MatrixType *Arg, | ||||||
2155 | unsigned (ConstantMatrixType::*GetArgDimension)() const, | ||||||
2156 | Expr *(DependentSizedMatrixType::*GetArgDimensionExpr)() const) { | ||||||
2157 | const auto *ArgConstMatrix = dyn_cast<ConstantMatrixType>(Arg); | ||||||
2158 | const auto *ArgDepMatrix = dyn_cast<DependentSizedMatrixType>(Arg); | ||||||
2159 | if (!ParamExpr->isValueDependent()) { | ||||||
2160 | Optional<llvm::APSInt> ParamConst = | ||||||
2161 | ParamExpr->getIntegerConstantExpr(S.Context); | ||||||
2162 | if (!ParamConst) | ||||||
2163 | return Sema::TDK_NonDeducedMismatch; | ||||||
2164 | |||||||
2165 | if (ArgConstMatrix) { | ||||||
2166 | if ((ArgConstMatrix->*GetArgDimension)() == *ParamConst) | ||||||
2167 | return Sema::TDK_Success; | ||||||
2168 | return Sema::TDK_NonDeducedMismatch; | ||||||
2169 | } | ||||||
2170 | |||||||
2171 | Expr *ArgExpr = (ArgDepMatrix->*GetArgDimensionExpr)(); | ||||||
2172 | if (!ArgExpr->isValueDependent()) | ||||||
2173 | if (Optional<llvm::APSInt> ArgConst = | ||||||
2174 | ArgExpr->getIntegerConstantExpr(S.Context)) | ||||||
2175 | if (*ArgConst == *ParamConst) | ||||||
2176 | return Sema::TDK_Success; | ||||||
2177 | return Sema::TDK_NonDeducedMismatch; | ||||||
2178 | } | ||||||
2179 | |||||||
2180 | const NonTypeTemplateParmDecl *NTTP = | ||||||
2181 | getDeducedParameterFromExpr(Info, ParamExpr); | ||||||
2182 | if (!NTTP) | ||||||
2183 | return Sema::TDK_Success; | ||||||
2184 | |||||||
2185 | if (ArgConstMatrix) { | ||||||
2186 | llvm::APSInt ArgConst( | ||||||
2187 | S.Context.getTypeSize(S.Context.getSizeType())); | ||||||
2188 | ArgConst = (ArgConstMatrix->*GetArgDimension)(); | ||||||
2189 | return DeduceNonTypeTemplateArgument( | ||||||
2190 | S, TemplateParams, NTTP, ArgConst, S.Context.getSizeType(), | ||||||
2191 | /*ArrayBound=*/true, Info, Deduced); | ||||||
2192 | } | ||||||
2193 | |||||||
2194 | return DeduceNonTypeTemplateArgument( | ||||||
2195 | S, TemplateParams, NTTP, (ArgDepMatrix->*GetArgDimensionExpr)(), | ||||||
2196 | Info, Deduced); | ||||||
2197 | }; | ||||||
2198 | |||||||
2199 | auto Result = DeduceMatrixArg(MatrixParam->getRowExpr(), MatrixArg, | ||||||
2200 | &ConstantMatrixType::getNumRows, | ||||||
2201 | &DependentSizedMatrixType::getRowExpr); | ||||||
2202 | if (Result) | ||||||
2203 | return Result; | ||||||
2204 | |||||||
2205 | return DeduceMatrixArg(MatrixParam->getColumnExpr(), MatrixArg, | ||||||
2206 | &ConstantMatrixType::getNumColumns, | ||||||
2207 | &DependentSizedMatrixType::getColumnExpr); | ||||||
2208 | } | ||||||
2209 | |||||||
2210 | // (clang extension) | ||||||
2211 | // | ||||||
2212 | // T __attribute__(((address_space(N)))) | ||||||
2213 | case Type::DependentAddressSpace: { | ||||||
2214 | const DependentAddressSpaceType *AddressSpaceParam = | ||||||
2215 | cast<DependentAddressSpaceType>(Param); | ||||||
2216 | |||||||
2217 | if (const DependentAddressSpaceType *AddressSpaceArg = | ||||||
2218 | dyn_cast<DependentAddressSpaceType>(Arg)) { | ||||||
2219 | // Perform deduction on the pointer type. | ||||||
2220 | if (Sema::TemplateDeductionResult Result = | ||||||
2221 | DeduceTemplateArgumentsByTypeMatch( | ||||||
2222 | S, TemplateParams, AddressSpaceParam->getPointeeType(), | ||||||
2223 | AddressSpaceArg->getPointeeType(), Info, Deduced, TDF)) | ||||||
2224 | return Result; | ||||||
2225 | |||||||
2226 | // Perform deduction on the address space, if we can. | ||||||
2227 | const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr( | ||||||
2228 | Info, AddressSpaceParam->getAddrSpaceExpr()); | ||||||
2229 | if (!NTTP) | ||||||
2230 | return Sema::TDK_Success; | ||||||
2231 | |||||||
2232 | return DeduceNonTypeTemplateArgument( | ||||||
2233 | S, TemplateParams, NTTP, AddressSpaceArg->getAddrSpaceExpr(), Info, | ||||||
2234 | Deduced); | ||||||
2235 | } | ||||||
2236 | |||||||
2237 | if (isTargetAddressSpace(Arg.getAddressSpace())) { | ||||||
2238 | llvm::APSInt ArgAddressSpace(S.Context.getTypeSize(S.Context.IntTy), | ||||||
2239 | false); | ||||||
2240 | ArgAddressSpace = toTargetAddressSpace(Arg.getAddressSpace()); | ||||||
2241 | |||||||
2242 | // Perform deduction on the pointer types. | ||||||
2243 | if (Sema::TemplateDeductionResult Result = | ||||||
2244 | DeduceTemplateArgumentsByTypeMatch( | ||||||
2245 | S, TemplateParams, AddressSpaceParam->getPointeeType(), | ||||||
2246 | S.Context.removeAddrSpaceQualType(Arg), Info, Deduced, TDF)) | ||||||
2247 | return Result; | ||||||
2248 | |||||||
2249 | // Perform deduction on the address space, if we can. | ||||||
2250 | const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr( | ||||||
2251 | Info, AddressSpaceParam->getAddrSpaceExpr()); | ||||||
2252 | if (!NTTP) | ||||||
2253 | return Sema::TDK_Success; | ||||||
2254 | |||||||
2255 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
2256 | ArgAddressSpace, S.Context.IntTy, | ||||||
2257 | true, Info, Deduced); | ||||||
2258 | } | ||||||
2259 | |||||||
2260 | return Sema::TDK_NonDeducedMismatch; | ||||||
2261 | } | ||||||
2262 | case Type::DependentExtInt: { | ||||||
2263 | const auto *IntParam = cast<DependentExtIntType>(Param); | ||||||
2264 | |||||||
2265 | if (const auto *IntArg = dyn_cast<ExtIntType>(Arg)){ | ||||||
2266 | if (IntParam->isUnsigned() != IntArg->isUnsigned()) | ||||||
2267 | return Sema::TDK_NonDeducedMismatch; | ||||||
2268 | |||||||
2269 | const NonTypeTemplateParmDecl *NTTP = | ||||||
2270 | getDeducedParameterFromExpr(Info, IntParam->getNumBitsExpr()); | ||||||
2271 | if (!NTTP) | ||||||
2272 | return Sema::TDK_Success; | ||||||
2273 | |||||||
2274 | llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false); | ||||||
2275 | ArgSize = IntArg->getNumBits(); | ||||||
2276 | |||||||
2277 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, ArgSize, | ||||||
2278 | S.Context.IntTy, true, Info, | ||||||
2279 | Deduced); | ||||||
2280 | } | ||||||
2281 | |||||||
2282 | if (const auto *IntArg = dyn_cast<DependentExtIntType>(Arg)) { | ||||||
2283 | if (IntParam->isUnsigned() != IntArg->isUnsigned()) | ||||||
2284 | return Sema::TDK_NonDeducedMismatch; | ||||||
2285 | return Sema::TDK_Success; | ||||||
2286 | } | ||||||
2287 | return Sema::TDK_NonDeducedMismatch; | ||||||
2288 | } | ||||||
2289 | |||||||
2290 | case Type::TypeOfExpr: | ||||||
2291 | case Type::TypeOf: | ||||||
2292 | case Type::DependentName: | ||||||
2293 | case Type::UnresolvedUsing: | ||||||
2294 | case Type::Decltype: | ||||||
2295 | case Type::UnaryTransform: | ||||||
2296 | case Type::Auto: | ||||||
2297 | case Type::DeducedTemplateSpecialization: | ||||||
2298 | case Type::DependentTemplateSpecialization: | ||||||
2299 | case Type::PackExpansion: | ||||||
2300 | case Type::Pipe: | ||||||
2301 | // No template argument deduction for these types | ||||||
2302 | return Sema::TDK_Success; | ||||||
2303 | } | ||||||
2304 | |||||||
2305 | llvm_unreachable("Invalid Type Class!")::llvm::llvm_unreachable_internal("Invalid Type Class!", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2305); | ||||||
2306 | } | ||||||
2307 | |||||||
2308 | static Sema::TemplateDeductionResult | ||||||
2309 | DeduceTemplateArguments(Sema &S, | ||||||
2310 | TemplateParameterList *TemplateParams, | ||||||
2311 | const TemplateArgument &Param, | ||||||
2312 | TemplateArgument Arg, | ||||||
2313 | TemplateDeductionInfo &Info, | ||||||
2314 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
2315 | // If the template argument is a pack expansion, perform template argument | ||||||
2316 | // deduction against the pattern of that expansion. This only occurs during | ||||||
2317 | // partial ordering. | ||||||
2318 | if (Arg.isPackExpansion()) | ||||||
2319 | Arg = Arg.getPackExpansionPattern(); | ||||||
2320 | |||||||
2321 | switch (Param.getKind()) { | ||||||
2322 | case TemplateArgument::Null: | ||||||
2323 | llvm_unreachable("Null template argument in parameter list")::llvm::llvm_unreachable_internal("Null template argument in parameter list" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2323); | ||||||
2324 | |||||||
2325 | case TemplateArgument::Type: | ||||||
2326 | if (Arg.getKind() == TemplateArgument::Type) | ||||||
2327 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
2328 | Param.getAsType(), | ||||||
2329 | Arg.getAsType(), | ||||||
2330 | Info, Deduced, 0); | ||||||
2331 | Info.FirstArg = Param; | ||||||
2332 | Info.SecondArg = Arg; | ||||||
2333 | return Sema::TDK_NonDeducedMismatch; | ||||||
2334 | |||||||
2335 | case TemplateArgument::Template: | ||||||
2336 | if (Arg.getKind() == TemplateArgument::Template) | ||||||
2337 | return DeduceTemplateArguments(S, TemplateParams, | ||||||
2338 | Param.getAsTemplate(), | ||||||
2339 | Arg.getAsTemplate(), Info, Deduced); | ||||||
2340 | Info.FirstArg = Param; | ||||||
2341 | Info.SecondArg = Arg; | ||||||
2342 | return Sema::TDK_NonDeducedMismatch; | ||||||
2343 | |||||||
2344 | case TemplateArgument::TemplateExpansion: | ||||||
2345 | llvm_unreachable("caller should handle pack expansions")::llvm::llvm_unreachable_internal("caller should handle pack expansions" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2345); | ||||||
2346 | |||||||
2347 | case TemplateArgument::Declaration: | ||||||
2348 | if (Arg.getKind() == TemplateArgument::Declaration && | ||||||
2349 | isSameDeclaration(Param.getAsDecl(), Arg.getAsDecl())) | ||||||
2350 | return Sema::TDK_Success; | ||||||
2351 | |||||||
2352 | Info.FirstArg = Param; | ||||||
2353 | Info.SecondArg = Arg; | ||||||
2354 | return Sema::TDK_NonDeducedMismatch; | ||||||
2355 | |||||||
2356 | case TemplateArgument::NullPtr: | ||||||
2357 | if (Arg.getKind() == TemplateArgument::NullPtr && | ||||||
2358 | S.Context.hasSameType(Param.getNullPtrType(), Arg.getNullPtrType())) | ||||||
2359 | return Sema::TDK_Success; | ||||||
2360 | |||||||
2361 | Info.FirstArg = Param; | ||||||
2362 | Info.SecondArg = Arg; | ||||||
2363 | return Sema::TDK_NonDeducedMismatch; | ||||||
2364 | |||||||
2365 | case TemplateArgument::Integral: | ||||||
2366 | if (Arg.getKind() == TemplateArgument::Integral) { | ||||||
2367 | if (hasSameExtendedValue(Param.getAsIntegral(), Arg.getAsIntegral())) | ||||||
2368 | return Sema::TDK_Success; | ||||||
2369 | |||||||
2370 | Info.FirstArg = Param; | ||||||
2371 | Info.SecondArg = Arg; | ||||||
2372 | return Sema::TDK_NonDeducedMismatch; | ||||||
2373 | } | ||||||
2374 | |||||||
2375 | if (Arg.getKind() == TemplateArgument::Expression) { | ||||||
2376 | Info.FirstArg = Param; | ||||||
2377 | Info.SecondArg = Arg; | ||||||
2378 | return Sema::TDK_NonDeducedMismatch; | ||||||
2379 | } | ||||||
2380 | |||||||
2381 | Info.FirstArg = Param; | ||||||
2382 | Info.SecondArg = Arg; | ||||||
2383 | return Sema::TDK_NonDeducedMismatch; | ||||||
2384 | |||||||
2385 | case TemplateArgument::Expression: | ||||||
2386 | if (const NonTypeTemplateParmDecl *NTTP = | ||||||
2387 | getDeducedParameterFromExpr(Info, Param.getAsExpr())) { | ||||||
2388 | if (Arg.getKind() == TemplateArgument::Integral) | ||||||
2389 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
2390 | Arg.getAsIntegral(), | ||||||
2391 | Arg.getIntegralType(), | ||||||
2392 | /*ArrayBound=*/false, | ||||||
2393 | Info, Deduced); | ||||||
2394 | if (Arg.getKind() == TemplateArgument::NullPtr) | ||||||
2395 | return DeduceNullPtrTemplateArgument(S, TemplateParams, NTTP, | ||||||
2396 | Arg.getNullPtrType(), | ||||||
2397 | Info, Deduced); | ||||||
2398 | if (Arg.getKind() == TemplateArgument::Expression) | ||||||
2399 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
2400 | Arg.getAsExpr(), Info, Deduced); | ||||||
2401 | if (Arg.getKind() == TemplateArgument::Declaration) | ||||||
2402 | return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, | ||||||
2403 | Arg.getAsDecl(), | ||||||
2404 | Arg.getParamTypeForDecl(), | ||||||
2405 | Info, Deduced); | ||||||
2406 | |||||||
2407 | Info.FirstArg = Param; | ||||||
2408 | Info.SecondArg = Arg; | ||||||
2409 | return Sema::TDK_NonDeducedMismatch; | ||||||
2410 | } | ||||||
2411 | |||||||
2412 | // Can't deduce anything, but that's okay. | ||||||
2413 | return Sema::TDK_Success; | ||||||
2414 | |||||||
2415 | case TemplateArgument::Pack: | ||||||
2416 | llvm_unreachable("Argument packs should be expanded by the caller!")::llvm::llvm_unreachable_internal("Argument packs should be expanded by the caller!" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2416); | ||||||
2417 | } | ||||||
2418 | |||||||
2419 | llvm_unreachable("Invalid TemplateArgument Kind!")::llvm::llvm_unreachable_internal("Invalid TemplateArgument Kind!" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2419); | ||||||
2420 | } | ||||||
2421 | |||||||
2422 | /// Determine whether there is a template argument to be used for | ||||||
2423 | /// deduction. | ||||||
2424 | /// | ||||||
2425 | /// This routine "expands" argument packs in-place, overriding its input | ||||||
2426 | /// parameters so that \c Args[ArgIdx] will be the available template argument. | ||||||
2427 | /// | ||||||
2428 | /// \returns true if there is another template argument (which will be at | ||||||
2429 | /// \c Args[ArgIdx]), false otherwise. | ||||||
2430 | static bool hasTemplateArgumentForDeduction(ArrayRef<TemplateArgument> &Args, | ||||||
2431 | unsigned &ArgIdx) { | ||||||
2432 | if (ArgIdx == Args.size()) | ||||||
2433 | return false; | ||||||
2434 | |||||||
2435 | const TemplateArgument &Arg = Args[ArgIdx]; | ||||||
2436 | if (Arg.getKind() != TemplateArgument::Pack) | ||||||
2437 | return true; | ||||||
2438 | |||||||
2439 | assert(ArgIdx == Args.size() - 1 && "Pack not at the end of argument list?")((ArgIdx == Args.size() - 1 && "Pack not at the end of argument list?" ) ? static_cast<void> (0) : __assert_fail ("ArgIdx == Args.size() - 1 && \"Pack not at the end of argument list?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2439, __PRETTY_FUNCTION__)); | ||||||
2440 | Args = Arg.pack_elements(); | ||||||
2441 | ArgIdx = 0; | ||||||
2442 | return ArgIdx < Args.size(); | ||||||
2443 | } | ||||||
2444 | |||||||
2445 | /// Determine whether the given set of template arguments has a pack | ||||||
2446 | /// expansion that is not the last template argument. | ||||||
2447 | static bool hasPackExpansionBeforeEnd(ArrayRef<TemplateArgument> Args) { | ||||||
2448 | bool FoundPackExpansion = false; | ||||||
2449 | for (const auto &A : Args) { | ||||||
2450 | if (FoundPackExpansion) | ||||||
2451 | return true; | ||||||
2452 | |||||||
2453 | if (A.getKind() == TemplateArgument::Pack) | ||||||
2454 | return hasPackExpansionBeforeEnd(A.pack_elements()); | ||||||
2455 | |||||||
2456 | // FIXME: If this is a fixed-arity pack expansion from an outer level of | ||||||
2457 | // templates, it should not be treated as a pack expansion. | ||||||
2458 | if (A.isPackExpansion()) | ||||||
2459 | FoundPackExpansion = true; | ||||||
2460 | } | ||||||
2461 | |||||||
2462 | return false; | ||||||
2463 | } | ||||||
2464 | |||||||
2465 | static Sema::TemplateDeductionResult | ||||||
2466 | DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams, | ||||||
2467 | ArrayRef<TemplateArgument> Params, | ||||||
2468 | ArrayRef<TemplateArgument> Args, | ||||||
2469 | TemplateDeductionInfo &Info, | ||||||
2470 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
2471 | bool NumberOfArgumentsMustMatch) { | ||||||
2472 | // C++0x [temp.deduct.type]p9: | ||||||
2473 | // If the template argument list of P contains a pack expansion that is not | ||||||
2474 | // the last template argument, the entire template argument list is a | ||||||
2475 | // non-deduced context. | ||||||
2476 | if (hasPackExpansionBeforeEnd(Params)) | ||||||
2477 | return Sema::TDK_Success; | ||||||
2478 | |||||||
2479 | // C++0x [temp.deduct.type]p9: | ||||||
2480 | // If P has a form that contains <T> or <i>, then each argument Pi of the | ||||||
2481 | // respective template argument list P is compared with the corresponding | ||||||
2482 | // argument Ai of the corresponding template argument list of A. | ||||||
2483 | unsigned ArgIdx = 0, ParamIdx = 0; | ||||||
2484 | for (; hasTemplateArgumentForDeduction(Params, ParamIdx); ++ParamIdx) { | ||||||
2485 | if (!Params[ParamIdx].isPackExpansion()) { | ||||||
2486 | // The simple case: deduce template arguments by matching Pi and Ai. | ||||||
2487 | |||||||
2488 | // Check whether we have enough arguments. | ||||||
2489 | if (!hasTemplateArgumentForDeduction(Args, ArgIdx)) | ||||||
2490 | return NumberOfArgumentsMustMatch | ||||||
2491 | ? Sema::TDK_MiscellaneousDeductionFailure | ||||||
2492 | : Sema::TDK_Success; | ||||||
2493 | |||||||
2494 | // C++1z [temp.deduct.type]p9: | ||||||
2495 | // During partial ordering, if Ai was originally a pack expansion [and] | ||||||
2496 | // Pi is not a pack expansion, template argument deduction fails. | ||||||
2497 | if (Args[ArgIdx].isPackExpansion()) | ||||||
2498 | return Sema::TDK_MiscellaneousDeductionFailure; | ||||||
2499 | |||||||
2500 | // Perform deduction for this Pi/Ai pair. | ||||||
2501 | if (Sema::TemplateDeductionResult Result | ||||||
2502 | = DeduceTemplateArguments(S, TemplateParams, | ||||||
2503 | Params[ParamIdx], Args[ArgIdx], | ||||||
2504 | Info, Deduced)) | ||||||
2505 | return Result; | ||||||
2506 | |||||||
2507 | // Move to the next argument. | ||||||
2508 | ++ArgIdx; | ||||||
2509 | continue; | ||||||
2510 | } | ||||||
2511 | |||||||
2512 | // The parameter is a pack expansion. | ||||||
2513 | |||||||
2514 | // C++0x [temp.deduct.type]p9: | ||||||
2515 | // If Pi is a pack expansion, then the pattern of Pi is compared with | ||||||
2516 | // each remaining argument in the template argument list of A. Each | ||||||
2517 | // comparison deduces template arguments for subsequent positions in the | ||||||
2518 | // template parameter packs expanded by Pi. | ||||||
2519 | TemplateArgument Pattern = Params[ParamIdx].getPackExpansionPattern(); | ||||||
2520 | |||||||
2521 | // Prepare to deduce the packs within the pattern. | ||||||
2522 | PackDeductionScope PackScope(S, TemplateParams, Deduced, Info, Pattern); | ||||||
2523 | |||||||
2524 | // Keep track of the deduced template arguments for each parameter pack | ||||||
2525 | // expanded by this pack expansion (the outer index) and for each | ||||||
2526 | // template argument (the inner SmallVectors). | ||||||
2527 | for (; hasTemplateArgumentForDeduction(Args, ArgIdx) && | ||||||
2528 | PackScope.hasNextElement(); | ||||||
2529 | ++ArgIdx) { | ||||||
2530 | // Deduce template arguments from the pattern. | ||||||
2531 | if (Sema::TemplateDeductionResult Result | ||||||
2532 | = DeduceTemplateArguments(S, TemplateParams, Pattern, Args[ArgIdx], | ||||||
2533 | Info, Deduced)) | ||||||
2534 | return Result; | ||||||
2535 | |||||||
2536 | PackScope.nextPackElement(); | ||||||
2537 | } | ||||||
2538 | |||||||
2539 | // Build argument packs for each of the parameter packs expanded by this | ||||||
2540 | // pack expansion. | ||||||
2541 | if (auto Result = PackScope.finish()) | ||||||
2542 | return Result; | ||||||
2543 | } | ||||||
2544 | |||||||
2545 | return Sema::TDK_Success; | ||||||
2546 | } | ||||||
2547 | |||||||
2548 | static Sema::TemplateDeductionResult | ||||||
2549 | DeduceTemplateArguments(Sema &S, | ||||||
2550 | TemplateParameterList *TemplateParams, | ||||||
2551 | const TemplateArgumentList &ParamList, | ||||||
2552 | const TemplateArgumentList &ArgList, | ||||||
2553 | TemplateDeductionInfo &Info, | ||||||
2554 | SmallVectorImpl<DeducedTemplateArgument> &Deduced) { | ||||||
2555 | return DeduceTemplateArguments(S, TemplateParams, ParamList.asArray(), | ||||||
2556 | ArgList.asArray(), Info, Deduced, | ||||||
2557 | /*NumberOfArgumentsMustMatch*/false); | ||||||
2558 | } | ||||||
2559 | |||||||
2560 | /// Determine whether two template arguments are the same. | ||||||
2561 | static bool isSameTemplateArg(ASTContext &Context, | ||||||
2562 | TemplateArgument X, | ||||||
2563 | const TemplateArgument &Y, | ||||||
2564 | bool PackExpansionMatchesPack = false) { | ||||||
2565 | // If we're checking deduced arguments (X) against original arguments (Y), | ||||||
2566 | // we will have flattened packs to non-expansions in X. | ||||||
2567 | if (PackExpansionMatchesPack && X.isPackExpansion() && !Y.isPackExpansion()) | ||||||
2568 | X = X.getPackExpansionPattern(); | ||||||
2569 | |||||||
2570 | if (X.getKind() != Y.getKind()) | ||||||
2571 | return false; | ||||||
2572 | |||||||
2573 | switch (X.getKind()) { | ||||||
2574 | case TemplateArgument::Null: | ||||||
2575 | llvm_unreachable("Comparing NULL template argument")::llvm::llvm_unreachable_internal("Comparing NULL template argument" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2575); | ||||||
2576 | |||||||
2577 | case TemplateArgument::Type: | ||||||
2578 | return Context.getCanonicalType(X.getAsType()) == | ||||||
2579 | Context.getCanonicalType(Y.getAsType()); | ||||||
2580 | |||||||
2581 | case TemplateArgument::Declaration: | ||||||
2582 | return isSameDeclaration(X.getAsDecl(), Y.getAsDecl()); | ||||||
2583 | |||||||
2584 | case TemplateArgument::NullPtr: | ||||||
2585 | return Context.hasSameType(X.getNullPtrType(), Y.getNullPtrType()); | ||||||
2586 | |||||||
2587 | case TemplateArgument::Template: | ||||||
2588 | case TemplateArgument::TemplateExpansion: | ||||||
2589 | return Context.getCanonicalTemplateName( | ||||||
2590 | X.getAsTemplateOrTemplatePattern()).getAsVoidPointer() == | ||||||
2591 | Context.getCanonicalTemplateName( | ||||||
2592 | Y.getAsTemplateOrTemplatePattern()).getAsVoidPointer(); | ||||||
2593 | |||||||
2594 | case TemplateArgument::Integral: | ||||||
2595 | return hasSameExtendedValue(X.getAsIntegral(), Y.getAsIntegral()); | ||||||
2596 | |||||||
2597 | case TemplateArgument::Expression: { | ||||||
2598 | llvm::FoldingSetNodeID XID, YID; | ||||||
2599 | X.getAsExpr()->Profile(XID, Context, true); | ||||||
2600 | Y.getAsExpr()->Profile(YID, Context, true); | ||||||
2601 | return XID == YID; | ||||||
2602 | } | ||||||
2603 | |||||||
2604 | case TemplateArgument::Pack: | ||||||
2605 | if (X.pack_size() != Y.pack_size()) | ||||||
2606 | return false; | ||||||
2607 | |||||||
2608 | for (TemplateArgument::pack_iterator XP = X.pack_begin(), | ||||||
2609 | XPEnd = X.pack_end(), | ||||||
2610 | YP = Y.pack_begin(); | ||||||
2611 | XP != XPEnd; ++XP, ++YP) | ||||||
2612 | if (!isSameTemplateArg(Context, *XP, *YP, PackExpansionMatchesPack)) | ||||||
2613 | return false; | ||||||
2614 | |||||||
2615 | return true; | ||||||
2616 | } | ||||||
2617 | |||||||
2618 | llvm_unreachable("Invalid TemplateArgument Kind!")::llvm::llvm_unreachable_internal("Invalid TemplateArgument Kind!" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2618); | ||||||
2619 | } | ||||||
2620 | |||||||
2621 | /// Allocate a TemplateArgumentLoc where all locations have | ||||||
2622 | /// been initialized to the given location. | ||||||
2623 | /// | ||||||
2624 | /// \param Arg The template argument we are producing template argument | ||||||
2625 | /// location information for. | ||||||
2626 | /// | ||||||
2627 | /// \param NTTPType For a declaration template argument, the type of | ||||||
2628 | /// the non-type template parameter that corresponds to this template | ||||||
2629 | /// argument. Can be null if no type sugar is available to add to the | ||||||
2630 | /// type from the template argument. | ||||||
2631 | /// | ||||||
2632 | /// \param Loc The source location to use for the resulting template | ||||||
2633 | /// argument. | ||||||
2634 | TemplateArgumentLoc | ||||||
2635 | Sema::getTrivialTemplateArgumentLoc(const TemplateArgument &Arg, | ||||||
2636 | QualType NTTPType, SourceLocation Loc) { | ||||||
2637 | switch (Arg.getKind()) { | ||||||
2638 | case TemplateArgument::Null: | ||||||
2639 | llvm_unreachable("Can't get a NULL template argument here")::llvm::llvm_unreachable_internal("Can't get a NULL template argument here" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2639); | ||||||
2640 | |||||||
2641 | case TemplateArgument::Type: | ||||||
2642 | return TemplateArgumentLoc( | ||||||
2643 | Arg, Context.getTrivialTypeSourceInfo(Arg.getAsType(), Loc)); | ||||||
2644 | |||||||
2645 | case TemplateArgument::Declaration: { | ||||||
2646 | if (NTTPType.isNull()) | ||||||
2647 | NTTPType = Arg.getParamTypeForDecl(); | ||||||
2648 | Expr *E = BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc) | ||||||
2649 | .getAs<Expr>(); | ||||||
2650 | return TemplateArgumentLoc(TemplateArgument(E), E); | ||||||
2651 | } | ||||||
2652 | |||||||
2653 | case TemplateArgument::NullPtr: { | ||||||
2654 | if (NTTPType.isNull()) | ||||||
2655 | NTTPType = Arg.getNullPtrType(); | ||||||
2656 | Expr *E = BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc) | ||||||
2657 | .getAs<Expr>(); | ||||||
2658 | return TemplateArgumentLoc(TemplateArgument(NTTPType, /*isNullPtr*/true), | ||||||
2659 | E); | ||||||
2660 | } | ||||||
2661 | |||||||
2662 | case TemplateArgument::Integral: { | ||||||
2663 | Expr *E = | ||||||
2664 | BuildExpressionFromIntegralTemplateArgument(Arg, Loc).getAs<Expr>(); | ||||||
2665 | return TemplateArgumentLoc(TemplateArgument(E), E); | ||||||
2666 | } | ||||||
2667 | |||||||
2668 | case TemplateArgument::Template: | ||||||
2669 | case TemplateArgument::TemplateExpansion: { | ||||||
2670 | NestedNameSpecifierLocBuilder Builder; | ||||||
2671 | TemplateName Template = Arg.getAsTemplateOrTemplatePattern(); | ||||||
2672 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) | ||||||
2673 | Builder.MakeTrivial(Context, DTN->getQualifier(), Loc); | ||||||
2674 | else if (QualifiedTemplateName *QTN = | ||||||
2675 | Template.getAsQualifiedTemplateName()) | ||||||
2676 | Builder.MakeTrivial(Context, QTN->getQualifier(), Loc); | ||||||
2677 | |||||||
2678 | if (Arg.getKind() == TemplateArgument::Template) | ||||||
2679 | return TemplateArgumentLoc(Context, Arg, | ||||||
2680 | Builder.getWithLocInContext(Context), Loc); | ||||||
2681 | |||||||
2682 | return TemplateArgumentLoc( | ||||||
2683 | Context, Arg, Builder.getWithLocInContext(Context), Loc, Loc); | ||||||
2684 | } | ||||||
2685 | |||||||
2686 | case TemplateArgument::Expression: | ||||||
2687 | return TemplateArgumentLoc(Arg, Arg.getAsExpr()); | ||||||
2688 | |||||||
2689 | case TemplateArgument::Pack: | ||||||
2690 | return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo()); | ||||||
2691 | } | ||||||
2692 | |||||||
2693 | llvm_unreachable("Invalid TemplateArgument Kind!")::llvm::llvm_unreachable_internal("Invalid TemplateArgument Kind!" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2693); | ||||||
2694 | } | ||||||
2695 | |||||||
2696 | TemplateArgumentLoc | ||||||
2697 | Sema::getIdentityTemplateArgumentLoc(NamedDecl *TemplateParm, | ||||||
2698 | SourceLocation Location) { | ||||||
2699 | return getTrivialTemplateArgumentLoc( | ||||||
2700 | Context.getInjectedTemplateArg(TemplateParm), QualType(), Location); | ||||||
2701 | } | ||||||
2702 | |||||||
2703 | /// Convert the given deduced template argument and add it to the set of | ||||||
2704 | /// fully-converted template arguments. | ||||||
2705 | static bool | ||||||
2706 | ConvertDeducedTemplateArgument(Sema &S, NamedDecl *Param, | ||||||
2707 | DeducedTemplateArgument Arg, | ||||||
2708 | NamedDecl *Template, | ||||||
2709 | TemplateDeductionInfo &Info, | ||||||
2710 | bool IsDeduced, | ||||||
2711 | SmallVectorImpl<TemplateArgument> &Output) { | ||||||
2712 | auto ConvertArg = [&](DeducedTemplateArgument Arg, | ||||||
2713 | unsigned ArgumentPackIndex) { | ||||||
2714 | // Convert the deduced template argument into a template | ||||||
2715 | // argument that we can check, almost as if the user had written | ||||||
2716 | // the template argument explicitly. | ||||||
2717 | TemplateArgumentLoc ArgLoc = | ||||||
2718 | S.getTrivialTemplateArgumentLoc(Arg, QualType(), Info.getLocation()); | ||||||
2719 | |||||||
2720 | // Check the template argument, converting it as necessary. | ||||||
2721 | return S.CheckTemplateArgument( | ||||||
2722 | Param, ArgLoc, Template, Template->getLocation(), | ||||||
2723 | Template->getSourceRange().getEnd(), ArgumentPackIndex, Output, | ||||||
2724 | IsDeduced | ||||||
2725 | ? (Arg.wasDeducedFromArrayBound() ? Sema::CTAK_DeducedFromArrayBound | ||||||
2726 | : Sema::CTAK_Deduced) | ||||||
2727 | : Sema::CTAK_Specified); | ||||||
2728 | }; | ||||||
2729 | |||||||
2730 | if (Arg.getKind() == TemplateArgument::Pack) { | ||||||
2731 | // This is a template argument pack, so check each of its arguments against | ||||||
2732 | // the template parameter. | ||||||
2733 | SmallVector<TemplateArgument, 2> PackedArgsBuilder; | ||||||
2734 | for (const auto &P : Arg.pack_elements()) { | ||||||
2735 | // When converting the deduced template argument, append it to the | ||||||
2736 | // general output list. We need to do this so that the template argument | ||||||
2737 | // checking logic has all of the prior template arguments available. | ||||||
2738 | DeducedTemplateArgument InnerArg(P); | ||||||
2739 | InnerArg.setDeducedFromArrayBound(Arg.wasDeducedFromArrayBound()); | ||||||
2740 | assert(InnerArg.getKind() != TemplateArgument::Pack &&((InnerArg.getKind() != TemplateArgument::Pack && "deduced nested pack" ) ? static_cast<void> (0) : __assert_fail ("InnerArg.getKind() != TemplateArgument::Pack && \"deduced nested pack\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2741, __PRETTY_FUNCTION__)) | ||||||
2741 | "deduced nested pack")((InnerArg.getKind() != TemplateArgument::Pack && "deduced nested pack" ) ? static_cast<void> (0) : __assert_fail ("InnerArg.getKind() != TemplateArgument::Pack && \"deduced nested pack\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2741, __PRETTY_FUNCTION__)); | ||||||
2742 | if (P.isNull()) { | ||||||
2743 | // We deduced arguments for some elements of this pack, but not for | ||||||
2744 | // all of them. This happens if we get a conditionally-non-deduced | ||||||
2745 | // context in a pack expansion (such as an overload set in one of the | ||||||
2746 | // arguments). | ||||||
2747 | S.Diag(Param->getLocation(), | ||||||
2748 | diag::err_template_arg_deduced_incomplete_pack) | ||||||
2749 | << Arg << Param; | ||||||
2750 | return true; | ||||||
2751 | } | ||||||
2752 | if (ConvertArg(InnerArg, PackedArgsBuilder.size())) | ||||||
2753 | return true; | ||||||
2754 | |||||||
2755 | // Move the converted template argument into our argument pack. | ||||||
2756 | PackedArgsBuilder.push_back(Output.pop_back_val()); | ||||||
2757 | } | ||||||
2758 | |||||||
2759 | // If the pack is empty, we still need to substitute into the parameter | ||||||
2760 | // itself, in case that substitution fails. | ||||||
2761 | if (PackedArgsBuilder.empty()) { | ||||||
2762 | LocalInstantiationScope Scope(S); | ||||||
2763 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Output); | ||||||
2764 | MultiLevelTemplateArgumentList Args(TemplateArgs); | ||||||
2765 | |||||||
2766 | if (auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | ||||||
2767 | Sema::InstantiatingTemplate Inst(S, Template->getLocation(), Template, | ||||||
2768 | NTTP, Output, | ||||||
2769 | Template->getSourceRange()); | ||||||
2770 | if (Inst.isInvalid() || | ||||||
2771 | S.SubstType(NTTP->getType(), Args, NTTP->getLocation(), | ||||||
2772 | NTTP->getDeclName()).isNull()) | ||||||
2773 | return true; | ||||||
2774 | } else if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(Param)) { | ||||||
2775 | Sema::InstantiatingTemplate Inst(S, Template->getLocation(), Template, | ||||||
2776 | TTP, Output, | ||||||
2777 | Template->getSourceRange()); | ||||||
2778 | if (Inst.isInvalid() || !S.SubstDecl(TTP, S.CurContext, Args)) | ||||||
2779 | return true; | ||||||
2780 | } | ||||||
2781 | // For type parameters, no substitution is ever required. | ||||||
2782 | } | ||||||
2783 | |||||||
2784 | // Create the resulting argument pack. | ||||||
2785 | Output.push_back( | ||||||
2786 | TemplateArgument::CreatePackCopy(S.Context, PackedArgsBuilder)); | ||||||
2787 | return false; | ||||||
2788 | } | ||||||
2789 | |||||||
2790 | return ConvertArg(Arg, 0); | ||||||
2791 | } | ||||||
2792 | |||||||
2793 | // FIXME: This should not be a template, but | ||||||
2794 | // ClassTemplatePartialSpecializationDecl sadly does not derive from | ||||||
2795 | // TemplateDecl. | ||||||
2796 | template<typename TemplateDeclT> | ||||||
2797 | static Sema::TemplateDeductionResult ConvertDeducedTemplateArguments( | ||||||
2798 | Sema &S, TemplateDeclT *Template, bool IsDeduced, | ||||||
2799 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
2800 | TemplateDeductionInfo &Info, SmallVectorImpl<TemplateArgument> &Builder, | ||||||
2801 | LocalInstantiationScope *CurrentInstantiationScope = nullptr, | ||||||
2802 | unsigned NumAlreadyConverted = 0, bool PartialOverloading = false) { | ||||||
2803 | TemplateParameterList *TemplateParams = Template->getTemplateParameters(); | ||||||
2804 | |||||||
2805 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { | ||||||
2806 | NamedDecl *Param = TemplateParams->getParam(I); | ||||||
2807 | |||||||
2808 | // C++0x [temp.arg.explicit]p3: | ||||||
2809 | // A trailing template parameter pack (14.5.3) not otherwise deduced will | ||||||
2810 | // be deduced to an empty sequence of template arguments. | ||||||
2811 | // FIXME: Where did the word "trailing" come from? | ||||||
2812 | if (Deduced[I].isNull() && Param->isTemplateParameterPack()) { | ||||||
2813 | if (auto Result = | ||||||
2814 | PackDeductionScope(S, TemplateParams, Deduced, Info, I).finish()) | ||||||
2815 | return Result; | ||||||
2816 | } | ||||||
2817 | |||||||
2818 | if (!Deduced[I].isNull()) { | ||||||
2819 | if (I < NumAlreadyConverted) { | ||||||
2820 | // We may have had explicitly-specified template arguments for a | ||||||
2821 | // template parameter pack (that may or may not have been extended | ||||||
2822 | // via additional deduced arguments). | ||||||
2823 | if (Param->isParameterPack() && CurrentInstantiationScope && | ||||||
2824 | CurrentInstantiationScope->getPartiallySubstitutedPack() == Param) { | ||||||
2825 | // Forget the partially-substituted pack; its substitution is now | ||||||
2826 | // complete. | ||||||
2827 | CurrentInstantiationScope->ResetPartiallySubstitutedPack(); | ||||||
2828 | // We still need to check the argument in case it was extended by | ||||||
2829 | // deduction. | ||||||
2830 | } else { | ||||||
2831 | // We have already fully type-checked and converted this | ||||||
2832 | // argument, because it was explicitly-specified. Just record the | ||||||
2833 | // presence of this argument. | ||||||
2834 | Builder.push_back(Deduced[I]); | ||||||
2835 | continue; | ||||||
2836 | } | ||||||
2837 | } | ||||||
2838 | |||||||
2839 | // We may have deduced this argument, so it still needs to be | ||||||
2840 | // checked and converted. | ||||||
2841 | if (ConvertDeducedTemplateArgument(S, Param, Deduced[I], Template, Info, | ||||||
2842 | IsDeduced, Builder)) { | ||||||
2843 | Info.Param = makeTemplateParameter(Param); | ||||||
2844 | // FIXME: These template arguments are temporary. Free them! | ||||||
2845 | Info.reset(TemplateArgumentList::CreateCopy(S.Context, Builder)); | ||||||
2846 | return Sema::TDK_SubstitutionFailure; | ||||||
2847 | } | ||||||
2848 | |||||||
2849 | continue; | ||||||
2850 | } | ||||||
2851 | |||||||
2852 | // Substitute into the default template argument, if available. | ||||||
2853 | bool HasDefaultArg = false; | ||||||
2854 | TemplateDecl *TD = dyn_cast<TemplateDecl>(Template); | ||||||
2855 | if (!TD) { | ||||||
2856 | assert(isa<ClassTemplatePartialSpecializationDecl>(Template) ||((isa<ClassTemplatePartialSpecializationDecl>(Template) || isa<VarTemplatePartialSpecializationDecl>(Template) ) ? static_cast<void> (0) : __assert_fail ("isa<ClassTemplatePartialSpecializationDecl>(Template) || isa<VarTemplatePartialSpecializationDecl>(Template)" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2857, __PRETTY_FUNCTION__)) | ||||||
2857 | isa<VarTemplatePartialSpecializationDecl>(Template))((isa<ClassTemplatePartialSpecializationDecl>(Template) || isa<VarTemplatePartialSpecializationDecl>(Template) ) ? static_cast<void> (0) : __assert_fail ("isa<ClassTemplatePartialSpecializationDecl>(Template) || isa<VarTemplatePartialSpecializationDecl>(Template)" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 2857, __PRETTY_FUNCTION__)); | ||||||
2858 | return Sema::TDK_Incomplete; | ||||||
2859 | } | ||||||
2860 | |||||||
2861 | TemplateArgumentLoc DefArg = S.SubstDefaultTemplateArgumentIfAvailable( | ||||||
2862 | TD, TD->getLocation(), TD->getSourceRange().getEnd(), Param, Builder, | ||||||
2863 | HasDefaultArg); | ||||||
2864 | |||||||
2865 | // If there was no default argument, deduction is incomplete. | ||||||
2866 | if (DefArg.getArgument().isNull()) { | ||||||
2867 | Info.Param = makeTemplateParameter( | ||||||
2868 | const_cast<NamedDecl *>(TemplateParams->getParam(I))); | ||||||
2869 | Info.reset(TemplateArgumentList::CreateCopy(S.Context, Builder)); | ||||||
2870 | if (PartialOverloading) break; | ||||||
2871 | |||||||
2872 | return HasDefaultArg ? Sema::TDK_SubstitutionFailure | ||||||
2873 | : Sema::TDK_Incomplete; | ||||||
2874 | } | ||||||
2875 | |||||||
2876 | // Check whether we can actually use the default argument. | ||||||
2877 | if (S.CheckTemplateArgument(Param, DefArg, TD, TD->getLocation(), | ||||||
2878 | TD->getSourceRange().getEnd(), 0, Builder, | ||||||
2879 | Sema::CTAK_Specified)) { | ||||||
2880 | Info.Param = makeTemplateParameter( | ||||||
2881 | const_cast<NamedDecl *>(TemplateParams->getParam(I))); | ||||||
2882 | // FIXME: These template arguments are temporary. Free them! | ||||||
2883 | Info.reset(TemplateArgumentList::CreateCopy(S.Context, Builder)); | ||||||
2884 | return Sema::TDK_SubstitutionFailure; | ||||||
2885 | } | ||||||
2886 | |||||||
2887 | // If we get here, we successfully used the default template argument. | ||||||
2888 | } | ||||||
2889 | |||||||
2890 | return Sema::TDK_Success; | ||||||
2891 | } | ||||||
2892 | |||||||
2893 | static DeclContext *getAsDeclContextOrEnclosing(Decl *D) { | ||||||
2894 | if (auto *DC = dyn_cast<DeclContext>(D)) | ||||||
2895 | return DC; | ||||||
2896 | return D->getDeclContext(); | ||||||
2897 | } | ||||||
2898 | |||||||
2899 | template<typename T> struct IsPartialSpecialization { | ||||||
2900 | static constexpr bool value = false; | ||||||
2901 | }; | ||||||
2902 | template<> | ||||||
2903 | struct IsPartialSpecialization<ClassTemplatePartialSpecializationDecl> { | ||||||
2904 | static constexpr bool value = true; | ||||||
2905 | }; | ||||||
2906 | template<> | ||||||
2907 | struct IsPartialSpecialization<VarTemplatePartialSpecializationDecl> { | ||||||
2908 | static constexpr bool value = true; | ||||||
2909 | }; | ||||||
2910 | |||||||
2911 | template<typename TemplateDeclT> | ||||||
2912 | static Sema::TemplateDeductionResult | ||||||
2913 | CheckDeducedArgumentConstraints(Sema& S, TemplateDeclT *Template, | ||||||
2914 | ArrayRef<TemplateArgument> DeducedArgs, | ||||||
2915 | TemplateDeductionInfo& Info) { | ||||||
2916 | llvm::SmallVector<const Expr *, 3> AssociatedConstraints; | ||||||
2917 | Template->getAssociatedConstraints(AssociatedConstraints); | ||||||
2918 | if (S.CheckConstraintSatisfaction(Template, AssociatedConstraints, | ||||||
2919 | DeducedArgs, Info.getLocation(), | ||||||
2920 | Info.AssociatedConstraintsSatisfaction) || | ||||||
2921 | !Info.AssociatedConstraintsSatisfaction.IsSatisfied) { | ||||||
2922 | Info.reset(TemplateArgumentList::CreateCopy(S.Context, DeducedArgs)); | ||||||
2923 | return Sema::TDK_ConstraintsNotSatisfied; | ||||||
2924 | } | ||||||
2925 | return Sema::TDK_Success; | ||||||
2926 | } | ||||||
2927 | |||||||
2928 | /// Complete template argument deduction for a partial specialization. | ||||||
2929 | template <typename T> | ||||||
2930 | static std::enable_if_t<IsPartialSpecialization<T>::value, | ||||||
2931 | Sema::TemplateDeductionResult> | ||||||
2932 | FinishTemplateArgumentDeduction( | ||||||
2933 | Sema &S, T *Partial, bool IsPartialOrdering, | ||||||
2934 | const TemplateArgumentList &TemplateArgs, | ||||||
2935 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
2936 | TemplateDeductionInfo &Info) { | ||||||
2937 | // Unevaluated SFINAE context. | ||||||
2938 | EnterExpressionEvaluationContext Unevaluated( | ||||||
2939 | S, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
2940 | Sema::SFINAETrap Trap(S); | ||||||
2941 | |||||||
2942 | Sema::ContextRAII SavedContext(S, getAsDeclContextOrEnclosing(Partial)); | ||||||
2943 | |||||||
2944 | // C++ [temp.deduct.type]p2: | ||||||
2945 | // [...] or if any template argument remains neither deduced nor | ||||||
2946 | // explicitly specified, template argument deduction fails. | ||||||
2947 | SmallVector<TemplateArgument, 4> Builder; | ||||||
2948 | if (auto Result = ConvertDeducedTemplateArguments( | ||||||
2949 | S, Partial, IsPartialOrdering, Deduced, Info, Builder)) | ||||||
2950 | return Result; | ||||||
2951 | |||||||
2952 | // Form the template argument list from the deduced template arguments. | ||||||
2953 | TemplateArgumentList *DeducedArgumentList | ||||||
2954 | = TemplateArgumentList::CreateCopy(S.Context, Builder); | ||||||
2955 | |||||||
2956 | Info.reset(DeducedArgumentList); | ||||||
2957 | |||||||
2958 | // Substitute the deduced template arguments into the template | ||||||
2959 | // arguments of the class template partial specialization, and | ||||||
2960 | // verify that the instantiated template arguments are both valid | ||||||
2961 | // and are equivalent to the template arguments originally provided | ||||||
2962 | // to the class template. | ||||||
2963 | LocalInstantiationScope InstScope(S); | ||||||
2964 | auto *Template = Partial->getSpecializedTemplate(); | ||||||
2965 | const ASTTemplateArgumentListInfo *PartialTemplArgInfo = | ||||||
2966 | Partial->getTemplateArgsAsWritten(); | ||||||
2967 | const TemplateArgumentLoc *PartialTemplateArgs = | ||||||
2968 | PartialTemplArgInfo->getTemplateArgs(); | ||||||
2969 | |||||||
2970 | TemplateArgumentListInfo InstArgs(PartialTemplArgInfo->LAngleLoc, | ||||||
2971 | PartialTemplArgInfo->RAngleLoc); | ||||||
2972 | |||||||
2973 | if (S.Subst(PartialTemplateArgs, PartialTemplArgInfo->NumTemplateArgs, | ||||||
2974 | InstArgs, MultiLevelTemplateArgumentList(*DeducedArgumentList))) { | ||||||
2975 | unsigned ArgIdx = InstArgs.size(), ParamIdx = ArgIdx; | ||||||
2976 | if (ParamIdx >= Partial->getTemplateParameters()->size()) | ||||||
2977 | ParamIdx = Partial->getTemplateParameters()->size() - 1; | ||||||
2978 | |||||||
2979 | Decl *Param = const_cast<NamedDecl *>( | ||||||
2980 | Partial->getTemplateParameters()->getParam(ParamIdx)); | ||||||
2981 | Info.Param = makeTemplateParameter(Param); | ||||||
2982 | Info.FirstArg = PartialTemplateArgs[ArgIdx].getArgument(); | ||||||
2983 | return Sema::TDK_SubstitutionFailure; | ||||||
2984 | } | ||||||
2985 | |||||||
2986 | bool ConstraintsNotSatisfied; | ||||||
2987 | SmallVector<TemplateArgument, 4> ConvertedInstArgs; | ||||||
2988 | if (S.CheckTemplateArgumentList(Template, Partial->getLocation(), InstArgs, | ||||||
2989 | false, ConvertedInstArgs, | ||||||
2990 | /*UpdateArgsWithConversions=*/true, | ||||||
2991 | &ConstraintsNotSatisfied)) | ||||||
2992 | return ConstraintsNotSatisfied ? Sema::TDK_ConstraintsNotSatisfied : | ||||||
2993 | Sema::TDK_SubstitutionFailure; | ||||||
2994 | |||||||
2995 | TemplateParameterList *TemplateParams = Template->getTemplateParameters(); | ||||||
2996 | for (unsigned I = 0, E = TemplateParams->size(); I != E; ++I) { | ||||||
2997 | TemplateArgument InstArg = ConvertedInstArgs.data()[I]; | ||||||
2998 | if (!isSameTemplateArg(S.Context, TemplateArgs[I], InstArg)) { | ||||||
2999 | Info.Param = makeTemplateParameter(TemplateParams->getParam(I)); | ||||||
3000 | Info.FirstArg = TemplateArgs[I]; | ||||||
3001 | Info.SecondArg = InstArg; | ||||||
3002 | return Sema::TDK_NonDeducedMismatch; | ||||||
3003 | } | ||||||
3004 | } | ||||||
3005 | |||||||
3006 | if (Trap.hasErrorOccurred()) | ||||||
3007 | return Sema::TDK_SubstitutionFailure; | ||||||
3008 | |||||||
3009 | if (auto Result = CheckDeducedArgumentConstraints(S, Partial, Builder, Info)) | ||||||
3010 | return Result; | ||||||
3011 | |||||||
3012 | return Sema::TDK_Success; | ||||||
3013 | } | ||||||
3014 | |||||||
3015 | /// Complete template argument deduction for a class or variable template, | ||||||
3016 | /// when partial ordering against a partial specialization. | ||||||
3017 | // FIXME: Factor out duplication with partial specialization version above. | ||||||
3018 | static Sema::TemplateDeductionResult FinishTemplateArgumentDeduction( | ||||||
3019 | Sema &S, TemplateDecl *Template, bool PartialOrdering, | ||||||
3020 | const TemplateArgumentList &TemplateArgs, | ||||||
3021 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
3022 | TemplateDeductionInfo &Info) { | ||||||
3023 | // Unevaluated SFINAE context. | ||||||
3024 | EnterExpressionEvaluationContext Unevaluated( | ||||||
3025 | S, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
3026 | Sema::SFINAETrap Trap(S); | ||||||
3027 | |||||||
3028 | Sema::ContextRAII SavedContext(S, getAsDeclContextOrEnclosing(Template)); | ||||||
3029 | |||||||
3030 | // C++ [temp.deduct.type]p2: | ||||||
3031 | // [...] or if any template argument remains neither deduced nor | ||||||
3032 | // explicitly specified, template argument deduction fails. | ||||||
3033 | SmallVector<TemplateArgument, 4> Builder; | ||||||
3034 | if (auto Result = ConvertDeducedTemplateArguments( | ||||||
3035 | S, Template, /*IsDeduced*/PartialOrdering, Deduced, Info, Builder)) | ||||||
3036 | return Result; | ||||||
3037 | |||||||
3038 | // Check that we produced the correct argument list. | ||||||
3039 | TemplateParameterList *TemplateParams = Template->getTemplateParameters(); | ||||||
3040 | for (unsigned I = 0, E = TemplateParams->size(); I != E; ++I) { | ||||||
3041 | TemplateArgument InstArg = Builder[I]; | ||||||
3042 | if (!isSameTemplateArg(S.Context, TemplateArgs[I], InstArg, | ||||||
3043 | /*PackExpansionMatchesPack*/true)) { | ||||||
3044 | Info.Param = makeTemplateParameter(TemplateParams->getParam(I)); | ||||||
3045 | Info.FirstArg = TemplateArgs[I]; | ||||||
3046 | Info.SecondArg = InstArg; | ||||||
3047 | return Sema::TDK_NonDeducedMismatch; | ||||||
3048 | } | ||||||
3049 | } | ||||||
3050 | |||||||
3051 | if (Trap.hasErrorOccurred()) | ||||||
3052 | return Sema::TDK_SubstitutionFailure; | ||||||
3053 | |||||||
3054 | if (auto Result = CheckDeducedArgumentConstraints(S, Template, Builder, | ||||||
3055 | Info)) | ||||||
3056 | return Result; | ||||||
3057 | |||||||
3058 | return Sema::TDK_Success; | ||||||
3059 | } | ||||||
3060 | |||||||
3061 | /// Perform template argument deduction to determine whether | ||||||
3062 | /// the given template arguments match the given class template | ||||||
3063 | /// partial specialization per C++ [temp.class.spec.match]. | ||||||
3064 | Sema::TemplateDeductionResult | ||||||
3065 | Sema::DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, | ||||||
3066 | const TemplateArgumentList &TemplateArgs, | ||||||
3067 | TemplateDeductionInfo &Info) { | ||||||
3068 | if (Partial->isInvalidDecl()) | ||||||
3069 | return TDK_Invalid; | ||||||
3070 | |||||||
3071 | // C++ [temp.class.spec.match]p2: | ||||||
3072 | // A partial specialization matches a given actual template | ||||||
3073 | // argument list if the template arguments of the partial | ||||||
3074 | // specialization can be deduced from the actual template argument | ||||||
3075 | // list (14.8.2). | ||||||
3076 | |||||||
3077 | // Unevaluated SFINAE context. | ||||||
3078 | EnterExpressionEvaluationContext Unevaluated( | ||||||
3079 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
3080 | SFINAETrap Trap(*this); | ||||||
3081 | |||||||
3082 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
3083 | Deduced.resize(Partial->getTemplateParameters()->size()); | ||||||
3084 | if (TemplateDeductionResult Result | ||||||
3085 | = ::DeduceTemplateArguments(*this, | ||||||
3086 | Partial->getTemplateParameters(), | ||||||
3087 | Partial->getTemplateArgs(), | ||||||
3088 | TemplateArgs, Info, Deduced)) | ||||||
3089 | return Result; | ||||||
3090 | |||||||
3091 | SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); | ||||||
3092 | InstantiatingTemplate Inst(*this, Info.getLocation(), Partial, DeducedArgs, | ||||||
3093 | Info); | ||||||
3094 | if (Inst.isInvalid()) | ||||||
3095 | return TDK_InstantiationDepth; | ||||||
3096 | |||||||
3097 | if (Trap.hasErrorOccurred()) | ||||||
3098 | return Sema::TDK_SubstitutionFailure; | ||||||
3099 | |||||||
3100 | TemplateDeductionResult Result; | ||||||
3101 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
3102 | Result = ::FinishTemplateArgumentDeduction(*this, Partial, | ||||||
3103 | /*IsPartialOrdering=*/false, | ||||||
3104 | TemplateArgs, Deduced, Info); | ||||||
3105 | }); | ||||||
3106 | return Result; | ||||||
3107 | } | ||||||
3108 | |||||||
3109 | /// Perform template argument deduction to determine whether | ||||||
3110 | /// the given template arguments match the given variable template | ||||||
3111 | /// partial specialization per C++ [temp.class.spec.match]. | ||||||
3112 | Sema::TemplateDeductionResult | ||||||
3113 | Sema::DeduceTemplateArguments(VarTemplatePartialSpecializationDecl *Partial, | ||||||
3114 | const TemplateArgumentList &TemplateArgs, | ||||||
3115 | TemplateDeductionInfo &Info) { | ||||||
3116 | if (Partial->isInvalidDecl()) | ||||||
3117 | return TDK_Invalid; | ||||||
3118 | |||||||
3119 | // C++ [temp.class.spec.match]p2: | ||||||
3120 | // A partial specialization matches a given actual template | ||||||
3121 | // argument list if the template arguments of the partial | ||||||
3122 | // specialization can be deduced from the actual template argument | ||||||
3123 | // list (14.8.2). | ||||||
3124 | |||||||
3125 | // Unevaluated SFINAE context. | ||||||
3126 | EnterExpressionEvaluationContext Unevaluated( | ||||||
3127 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
3128 | SFINAETrap Trap(*this); | ||||||
3129 | |||||||
3130 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
3131 | Deduced.resize(Partial->getTemplateParameters()->size()); | ||||||
3132 | if (TemplateDeductionResult Result = ::DeduceTemplateArguments( | ||||||
3133 | *this, Partial->getTemplateParameters(), Partial->getTemplateArgs(), | ||||||
3134 | TemplateArgs, Info, Deduced)) | ||||||
3135 | return Result; | ||||||
3136 | |||||||
3137 | SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); | ||||||
3138 | InstantiatingTemplate Inst(*this, Info.getLocation(), Partial, DeducedArgs, | ||||||
3139 | Info); | ||||||
3140 | if (Inst.isInvalid()) | ||||||
3141 | return TDK_InstantiationDepth; | ||||||
3142 | |||||||
3143 | if (Trap.hasErrorOccurred()) | ||||||
3144 | return Sema::TDK_SubstitutionFailure; | ||||||
3145 | |||||||
3146 | TemplateDeductionResult Result; | ||||||
3147 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
3148 | Result = ::FinishTemplateArgumentDeduction(*this, Partial, | ||||||
3149 | /*IsPartialOrdering=*/false, | ||||||
3150 | TemplateArgs, Deduced, Info); | ||||||
3151 | }); | ||||||
3152 | return Result; | ||||||
3153 | } | ||||||
3154 | |||||||
3155 | /// Determine whether the given type T is a simple-template-id type. | ||||||
3156 | static bool isSimpleTemplateIdType(QualType T) { | ||||||
3157 | if (const TemplateSpecializationType *Spec | ||||||
3158 | = T->getAs<TemplateSpecializationType>()) | ||||||
3159 | return Spec->getTemplateName().getAsTemplateDecl() != nullptr; | ||||||
3160 | |||||||
3161 | // C++17 [temp.local]p2: | ||||||
3162 | // the injected-class-name [...] is equivalent to the template-name followed | ||||||
3163 | // by the template-arguments of the class template specialization or partial | ||||||
3164 | // specialization enclosed in <> | ||||||
3165 | // ... which means it's equivalent to a simple-template-id. | ||||||
3166 | // | ||||||
3167 | // This only arises during class template argument deduction for a copy | ||||||
3168 | // deduction candidate, where it permits slicing. | ||||||
3169 | if (T->getAs<InjectedClassNameType>()) | ||||||
3170 | return true; | ||||||
3171 | |||||||
3172 | return false; | ||||||
3173 | } | ||||||
3174 | |||||||
3175 | /// Substitute the explicitly-provided template arguments into the | ||||||
3176 | /// given function template according to C++ [temp.arg.explicit]. | ||||||
3177 | /// | ||||||
3178 | /// \param FunctionTemplate the function template into which the explicit | ||||||
3179 | /// template arguments will be substituted. | ||||||
3180 | /// | ||||||
3181 | /// \param ExplicitTemplateArgs the explicitly-specified template | ||||||
3182 | /// arguments. | ||||||
3183 | /// | ||||||
3184 | /// \param Deduced the deduced template arguments, which will be populated | ||||||
3185 | /// with the converted and checked explicit template arguments. | ||||||
3186 | /// | ||||||
3187 | /// \param ParamTypes will be populated with the instantiated function | ||||||
3188 | /// parameters. | ||||||
3189 | /// | ||||||
3190 | /// \param FunctionType if non-NULL, the result type of the function template | ||||||
3191 | /// will also be instantiated and the pointed-to value will be updated with | ||||||
3192 | /// the instantiated function type. | ||||||
3193 | /// | ||||||
3194 | /// \param Info if substitution fails for any reason, this object will be | ||||||
3195 | /// populated with more information about the failure. | ||||||
3196 | /// | ||||||
3197 | /// \returns TDK_Success if substitution was successful, or some failure | ||||||
3198 | /// condition. | ||||||
3199 | Sema::TemplateDeductionResult | ||||||
3200 | Sema::SubstituteExplicitTemplateArguments( | ||||||
3201 | FunctionTemplateDecl *FunctionTemplate, | ||||||
3202 | TemplateArgumentListInfo &ExplicitTemplateArgs, | ||||||
3203 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
3204 | SmallVectorImpl<QualType> &ParamTypes, | ||||||
3205 | QualType *FunctionType, | ||||||
3206 | TemplateDeductionInfo &Info) { | ||||||
3207 | FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); | ||||||
3208 | TemplateParameterList *TemplateParams | ||||||
3209 | = FunctionTemplate->getTemplateParameters(); | ||||||
3210 | |||||||
3211 | if (ExplicitTemplateArgs.size() == 0) { | ||||||
3212 | // No arguments to substitute; just copy over the parameter types and | ||||||
3213 | // fill in the function type. | ||||||
3214 | for (auto P : Function->parameters()) | ||||||
3215 | ParamTypes.push_back(P->getType()); | ||||||
3216 | |||||||
3217 | if (FunctionType) | ||||||
3218 | *FunctionType = Function->getType(); | ||||||
3219 | return TDK_Success; | ||||||
3220 | } | ||||||
3221 | |||||||
3222 | // Unevaluated SFINAE context. | ||||||
3223 | EnterExpressionEvaluationContext Unevaluated( | ||||||
3224 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
3225 | SFINAETrap Trap(*this); | ||||||
3226 | |||||||
3227 | // C++ [temp.arg.explicit]p3: | ||||||
3228 | // Template arguments that are present shall be specified in the | ||||||
3229 | // declaration order of their corresponding template-parameters. The | ||||||
3230 | // template argument list shall not specify more template-arguments than | ||||||
3231 | // there are corresponding template-parameters. | ||||||
3232 | SmallVector<TemplateArgument, 4> Builder; | ||||||
3233 | |||||||
3234 | // Enter a new template instantiation context where we check the | ||||||
3235 | // explicitly-specified template arguments against this function template, | ||||||
3236 | // and then substitute them into the function parameter types. | ||||||
3237 | SmallVector<TemplateArgument, 4> DeducedArgs; | ||||||
3238 | InstantiatingTemplate Inst( | ||||||
3239 | *this, Info.getLocation(), FunctionTemplate, DeducedArgs, | ||||||
3240 | CodeSynthesisContext::ExplicitTemplateArgumentSubstitution, Info); | ||||||
3241 | if (Inst.isInvalid()) | ||||||
3242 | return TDK_InstantiationDepth; | ||||||
3243 | |||||||
3244 | if (CheckTemplateArgumentList(FunctionTemplate, SourceLocation(), | ||||||
3245 | ExplicitTemplateArgs, true, Builder, false) || | ||||||
3246 | Trap.hasErrorOccurred()) { | ||||||
3247 | unsigned Index = Builder.size(); | ||||||
3248 | if (Index >= TemplateParams->size()) | ||||||
3249 | return TDK_SubstitutionFailure; | ||||||
3250 | Info.Param = makeTemplateParameter(TemplateParams->getParam(Index)); | ||||||
3251 | return TDK_InvalidExplicitArguments; | ||||||
3252 | } | ||||||
3253 | |||||||
3254 | // Form the template argument list from the explicitly-specified | ||||||
3255 | // template arguments. | ||||||
3256 | TemplateArgumentList *ExplicitArgumentList | ||||||
3257 | = TemplateArgumentList::CreateCopy(Context, Builder); | ||||||
3258 | Info.setExplicitArgs(ExplicitArgumentList); | ||||||
3259 | |||||||
3260 | // Template argument deduction and the final substitution should be | ||||||
3261 | // done in the context of the templated declaration. Explicit | ||||||
3262 | // argument substitution, on the other hand, needs to happen in the | ||||||
3263 | // calling context. | ||||||
3264 | ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); | ||||||
3265 | |||||||
3266 | // If we deduced template arguments for a template parameter pack, | ||||||
3267 | // note that the template argument pack is partially substituted and record | ||||||
3268 | // the explicit template arguments. They'll be used as part of deduction | ||||||
3269 | // for this template parameter pack. | ||||||
3270 | unsigned PartiallySubstitutedPackIndex = -1u; | ||||||
3271 | if (!Builder.empty()) { | ||||||
3272 | const TemplateArgument &Arg = Builder.back(); | ||||||
3273 | if (Arg.getKind() == TemplateArgument::Pack) { | ||||||
3274 | auto *Param = TemplateParams->getParam(Builder.size() - 1); | ||||||
3275 | // If this is a fully-saturated fixed-size pack, it should be | ||||||
3276 | // fully-substituted, not partially-substituted. | ||||||
3277 | Optional<unsigned> Expansions = getExpandedPackSize(Param); | ||||||
3278 | if (!Expansions || Arg.pack_size() < *Expansions) { | ||||||
3279 | PartiallySubstitutedPackIndex = Builder.size() - 1; | ||||||
3280 | CurrentInstantiationScope->SetPartiallySubstitutedPack( | ||||||
3281 | Param, Arg.pack_begin(), Arg.pack_size()); | ||||||
3282 | } | ||||||
3283 | } | ||||||
3284 | } | ||||||
3285 | |||||||
3286 | const FunctionProtoType *Proto | ||||||
3287 | = Function->getType()->getAs<FunctionProtoType>(); | ||||||
3288 | assert(Proto && "Function template does not have a prototype?")((Proto && "Function template does not have a prototype?" ) ? static_cast<void> (0) : __assert_fail ("Proto && \"Function template does not have a prototype?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 3288, __PRETTY_FUNCTION__)); | ||||||
3289 | |||||||
3290 | // Isolate our substituted parameters from our caller. | ||||||
3291 | LocalInstantiationScope InstScope(*this, /*MergeWithOuterScope*/true); | ||||||
3292 | |||||||
3293 | ExtParameterInfoBuilder ExtParamInfos; | ||||||
3294 | |||||||
3295 | // Instantiate the types of each of the function parameters given the | ||||||
3296 | // explicitly-specified template arguments. If the function has a trailing | ||||||
3297 | // return type, substitute it after the arguments to ensure we substitute | ||||||
3298 | // in lexical order. | ||||||
3299 | if (Proto->hasTrailingReturn()) { | ||||||
3300 | if (SubstParmTypes(Function->getLocation(), Function->parameters(), | ||||||
3301 | Proto->getExtParameterInfosOrNull(), | ||||||
3302 | MultiLevelTemplateArgumentList(*ExplicitArgumentList), | ||||||
3303 | ParamTypes, /*params*/ nullptr, ExtParamInfos)) | ||||||
3304 | return TDK_SubstitutionFailure; | ||||||
3305 | } | ||||||
3306 | |||||||
3307 | // Instantiate the return type. | ||||||
3308 | QualType ResultType; | ||||||
3309 | { | ||||||
3310 | // C++11 [expr.prim.general]p3: | ||||||
3311 | // If a declaration declares a member function or member function | ||||||
3312 | // template of a class X, the expression this is a prvalue of type | ||||||
3313 | // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq | ||||||
3314 | // and the end of the function-definition, member-declarator, or | ||||||
3315 | // declarator. | ||||||
3316 | Qualifiers ThisTypeQuals; | ||||||
3317 | CXXRecordDecl *ThisContext = nullptr; | ||||||
3318 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Function)) { | ||||||
3319 | ThisContext = Method->getParent(); | ||||||
3320 | ThisTypeQuals = Method->getMethodQualifiers(); | ||||||
3321 | } | ||||||
3322 | |||||||
3323 | CXXThisScopeRAII ThisScope(*this, ThisContext, ThisTypeQuals, | ||||||
3324 | getLangOpts().CPlusPlus11); | ||||||
3325 | |||||||
3326 | ResultType = | ||||||
3327 | SubstType(Proto->getReturnType(), | ||||||
3328 | MultiLevelTemplateArgumentList(*ExplicitArgumentList), | ||||||
3329 | Function->getTypeSpecStartLoc(), Function->getDeclName()); | ||||||
3330 | if (ResultType.isNull() || Trap.hasErrorOccurred()) | ||||||
3331 | return TDK_SubstitutionFailure; | ||||||
3332 | // CUDA: Kernel function must have 'void' return type. | ||||||
3333 | if (getLangOpts().CUDA) | ||||||
3334 | if (Function->hasAttr<CUDAGlobalAttr>() && !ResultType->isVoidType()) { | ||||||
3335 | Diag(Function->getLocation(), diag::err_kern_type_not_void_return) | ||||||
3336 | << Function->getType() << Function->getSourceRange(); | ||||||
3337 | return TDK_SubstitutionFailure; | ||||||
3338 | } | ||||||
3339 | } | ||||||
3340 | |||||||
3341 | // Instantiate the types of each of the function parameters given the | ||||||
3342 | // explicitly-specified template arguments if we didn't do so earlier. | ||||||
3343 | if (!Proto->hasTrailingReturn() && | ||||||
3344 | SubstParmTypes(Function->getLocation(), Function->parameters(), | ||||||
3345 | Proto->getExtParameterInfosOrNull(), | ||||||
3346 | MultiLevelTemplateArgumentList(*ExplicitArgumentList), | ||||||
3347 | ParamTypes, /*params*/ nullptr, ExtParamInfos)) | ||||||
3348 | return TDK_SubstitutionFailure; | ||||||
3349 | |||||||
3350 | if (FunctionType) { | ||||||
3351 | auto EPI = Proto->getExtProtoInfo(); | ||||||
3352 | EPI.ExtParameterInfos = ExtParamInfos.getPointerOrNull(ParamTypes.size()); | ||||||
3353 | |||||||
3354 | // In C++1z onwards, exception specifications are part of the function type, | ||||||
3355 | // so substitution into the type must also substitute into the exception | ||||||
3356 | // specification. | ||||||
3357 | SmallVector<QualType, 4> ExceptionStorage; | ||||||
3358 | if (getLangOpts().CPlusPlus17 && | ||||||
3359 | SubstExceptionSpec( | ||||||
3360 | Function->getLocation(), EPI.ExceptionSpec, ExceptionStorage, | ||||||
3361 | MultiLevelTemplateArgumentList(*ExplicitArgumentList))) | ||||||
3362 | return TDK_SubstitutionFailure; | ||||||
3363 | |||||||
3364 | *FunctionType = BuildFunctionType(ResultType, ParamTypes, | ||||||
3365 | Function->getLocation(), | ||||||
3366 | Function->getDeclName(), | ||||||
3367 | EPI); | ||||||
3368 | if (FunctionType->isNull() || Trap.hasErrorOccurred()) | ||||||
3369 | return TDK_SubstitutionFailure; | ||||||
3370 | } | ||||||
3371 | |||||||
3372 | // C++ [temp.arg.explicit]p2: | ||||||
3373 | // Trailing template arguments that can be deduced (14.8.2) may be | ||||||
3374 | // omitted from the list of explicit template-arguments. If all of the | ||||||
3375 | // template arguments can be deduced, they may all be omitted; in this | ||||||
3376 | // case, the empty template argument list <> itself may also be omitted. | ||||||
3377 | // | ||||||
3378 | // Take all of the explicitly-specified arguments and put them into | ||||||
3379 | // the set of deduced template arguments. The partially-substituted | ||||||
3380 | // parameter pack, however, will be set to NULL since the deduction | ||||||
3381 | // mechanism handles the partially-substituted argument pack directly. | ||||||
3382 | Deduced.reserve(TemplateParams->size()); | ||||||
3383 | for (unsigned I = 0, N = ExplicitArgumentList->size(); I != N; ++I) { | ||||||
3384 | const TemplateArgument &Arg = ExplicitArgumentList->get(I); | ||||||
3385 | if (I == PartiallySubstitutedPackIndex) | ||||||
3386 | Deduced.push_back(DeducedTemplateArgument()); | ||||||
3387 | else | ||||||
3388 | Deduced.push_back(Arg); | ||||||
3389 | } | ||||||
3390 | |||||||
3391 | return TDK_Success; | ||||||
3392 | } | ||||||
3393 | |||||||
3394 | /// Check whether the deduced argument type for a call to a function | ||||||
3395 | /// template matches the actual argument type per C++ [temp.deduct.call]p4. | ||||||
3396 | static Sema::TemplateDeductionResult | ||||||
3397 | CheckOriginalCallArgDeduction(Sema &S, TemplateDeductionInfo &Info, | ||||||
3398 | Sema::OriginalCallArg OriginalArg, | ||||||
3399 | QualType DeducedA) { | ||||||
3400 | ASTContext &Context = S.Context; | ||||||
3401 | |||||||
3402 | auto Failed = [&]() -> Sema::TemplateDeductionResult { | ||||||
3403 | Info.FirstArg = TemplateArgument(DeducedA); | ||||||
3404 | Info.SecondArg = TemplateArgument(OriginalArg.OriginalArgType); | ||||||
3405 | Info.CallArgIndex = OriginalArg.ArgIdx; | ||||||
3406 | return OriginalArg.DecomposedParam ? Sema::TDK_DeducedMismatchNested | ||||||
3407 | : Sema::TDK_DeducedMismatch; | ||||||
3408 | }; | ||||||
3409 | |||||||
3410 | QualType A = OriginalArg.OriginalArgType; | ||||||
3411 | QualType OriginalParamType = OriginalArg.OriginalParamType; | ||||||
3412 | |||||||
3413 | // Check for type equality (top-level cv-qualifiers are ignored). | ||||||
3414 | if (Context.hasSameUnqualifiedType(A, DeducedA)) | ||||||
3415 | return Sema::TDK_Success; | ||||||
3416 | |||||||
3417 | // Strip off references on the argument types; they aren't needed for | ||||||
3418 | // the following checks. | ||||||
3419 | if (const ReferenceType *DeducedARef = DeducedA->getAs<ReferenceType>()) | ||||||
3420 | DeducedA = DeducedARef->getPointeeType(); | ||||||
3421 | if (const ReferenceType *ARef = A->getAs<ReferenceType>()) | ||||||
3422 | A = ARef->getPointeeType(); | ||||||
3423 | |||||||
3424 | // C++ [temp.deduct.call]p4: | ||||||
3425 | // [...] However, there are three cases that allow a difference: | ||||||
3426 | // - If the original P is a reference type, the deduced A (i.e., the | ||||||
3427 | // type referred to by the reference) can be more cv-qualified than | ||||||
3428 | // the transformed A. | ||||||
3429 | if (const ReferenceType *OriginalParamRef | ||||||
3430 | = OriginalParamType->getAs<ReferenceType>()) { | ||||||
3431 | // We don't want to keep the reference around any more. | ||||||
3432 | OriginalParamType = OriginalParamRef->getPointeeType(); | ||||||
3433 | |||||||
3434 | // FIXME: Resolve core issue (no number yet): if the original P is a | ||||||
3435 | // reference type and the transformed A is function type "noexcept F", | ||||||
3436 | // the deduced A can be F. | ||||||
3437 | QualType Tmp; | ||||||
3438 | if (A->isFunctionType() && S.IsFunctionConversion(A, DeducedA, Tmp)) | ||||||
3439 | return Sema::TDK_Success; | ||||||
3440 | |||||||
3441 | Qualifiers AQuals = A.getQualifiers(); | ||||||
3442 | Qualifiers DeducedAQuals = DeducedA.getQualifiers(); | ||||||
3443 | |||||||
3444 | // Under Objective-C++ ARC, the deduced type may have implicitly | ||||||
3445 | // been given strong or (when dealing with a const reference) | ||||||
3446 | // unsafe_unretained lifetime. If so, update the original | ||||||
3447 | // qualifiers to include this lifetime. | ||||||
3448 | if (S.getLangOpts().ObjCAutoRefCount && | ||||||
3449 | ((DeducedAQuals.getObjCLifetime() == Qualifiers::OCL_Strong && | ||||||
3450 | AQuals.getObjCLifetime() == Qualifiers::OCL_None) || | ||||||
3451 | (DeducedAQuals.hasConst() && | ||||||
3452 | DeducedAQuals.getObjCLifetime() == Qualifiers::OCL_ExplicitNone))) { | ||||||
3453 | AQuals.setObjCLifetime(DeducedAQuals.getObjCLifetime()); | ||||||
3454 | } | ||||||
3455 | |||||||
3456 | if (AQuals == DeducedAQuals) { | ||||||
3457 | // Qualifiers match; there's nothing to do. | ||||||
3458 | } else if (!DeducedAQuals.compatiblyIncludes(AQuals)) { | ||||||
3459 | return Failed(); | ||||||
3460 | } else { | ||||||
3461 | // Qualifiers are compatible, so have the argument type adopt the | ||||||
3462 | // deduced argument type's qualifiers as if we had performed the | ||||||
3463 | // qualification conversion. | ||||||
3464 | A = Context.getQualifiedType(A.getUnqualifiedType(), DeducedAQuals); | ||||||
3465 | } | ||||||
3466 | } | ||||||
3467 | |||||||
3468 | // - The transformed A can be another pointer or pointer to member | ||||||
3469 | // type that can be converted to the deduced A via a function pointer | ||||||
3470 | // conversion and/or a qualification conversion. | ||||||
3471 | // | ||||||
3472 | // Also allow conversions which merely strip __attribute__((noreturn)) from | ||||||
3473 | // function types (recursively). | ||||||
3474 | bool ObjCLifetimeConversion = false; | ||||||
3475 | QualType ResultTy; | ||||||
3476 | if ((A->isAnyPointerType() || A->isMemberPointerType()) && | ||||||
3477 | (S.IsQualificationConversion(A, DeducedA, false, | ||||||
3478 | ObjCLifetimeConversion) || | ||||||
3479 | S.IsFunctionConversion(A, DeducedA, ResultTy))) | ||||||
3480 | return Sema::TDK_Success; | ||||||
3481 | |||||||
3482 | // - If P is a class and P has the form simple-template-id, then the | ||||||
3483 | // transformed A can be a derived class of the deduced A. [...] | ||||||
3484 | // [...] Likewise, if P is a pointer to a class of the form | ||||||
3485 | // simple-template-id, the transformed A can be a pointer to a | ||||||
3486 | // derived class pointed to by the deduced A. | ||||||
3487 | if (const PointerType *OriginalParamPtr | ||||||
3488 | = OriginalParamType->getAs<PointerType>()) { | ||||||
3489 | if (const PointerType *DeducedAPtr = DeducedA->getAs<PointerType>()) { | ||||||
3490 | if (const PointerType *APtr = A->getAs<PointerType>()) { | ||||||
3491 | if (A->getPointeeType()->isRecordType()) { | ||||||
3492 | OriginalParamType = OriginalParamPtr->getPointeeType(); | ||||||
3493 | DeducedA = DeducedAPtr->getPointeeType(); | ||||||
3494 | A = APtr->getPointeeType(); | ||||||
3495 | } | ||||||
3496 | } | ||||||
3497 | } | ||||||
3498 | } | ||||||
3499 | |||||||
3500 | if (Context.hasSameUnqualifiedType(A, DeducedA)) | ||||||
3501 | return Sema::TDK_Success; | ||||||
3502 | |||||||
3503 | if (A->isRecordType() && isSimpleTemplateIdType(OriginalParamType) && | ||||||
3504 | S.IsDerivedFrom(Info.getLocation(), A, DeducedA)) | ||||||
3505 | return Sema::TDK_Success; | ||||||
3506 | |||||||
3507 | return Failed(); | ||||||
3508 | } | ||||||
3509 | |||||||
3510 | /// Find the pack index for a particular parameter index in an instantiation of | ||||||
3511 | /// a function template with specific arguments. | ||||||
3512 | /// | ||||||
3513 | /// \return The pack index for whichever pack produced this parameter, or -1 | ||||||
3514 | /// if this was not produced by a parameter. Intended to be used as the | ||||||
3515 | /// ArgumentPackSubstitutionIndex for further substitutions. | ||||||
3516 | // FIXME: We should track this in OriginalCallArgs so we don't need to | ||||||
3517 | // reconstruct it here. | ||||||
3518 | static unsigned getPackIndexForParam(Sema &S, | ||||||
3519 | FunctionTemplateDecl *FunctionTemplate, | ||||||
3520 | const MultiLevelTemplateArgumentList &Args, | ||||||
3521 | unsigned ParamIdx) { | ||||||
3522 | unsigned Idx = 0; | ||||||
3523 | for (auto *PD : FunctionTemplate->getTemplatedDecl()->parameters()) { | ||||||
3524 | if (PD->isParameterPack()) { | ||||||
3525 | unsigned NumExpansions = | ||||||
3526 | S.getNumArgumentsInExpansion(PD->getType(), Args).getValueOr(1); | ||||||
3527 | if (Idx + NumExpansions > ParamIdx) | ||||||
3528 | return ParamIdx - Idx; | ||||||
3529 | Idx += NumExpansions; | ||||||
3530 | } else { | ||||||
3531 | if (Idx == ParamIdx) | ||||||
3532 | return -1; // Not a pack expansion | ||||||
3533 | ++Idx; | ||||||
3534 | } | ||||||
3535 | } | ||||||
3536 | |||||||
3537 | llvm_unreachable("parameter index would not be produced from template")::llvm::llvm_unreachable_internal("parameter index would not be produced from template" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 3537); | ||||||
3538 | } | ||||||
3539 | |||||||
3540 | /// Finish template argument deduction for a function template, | ||||||
3541 | /// checking the deduced template arguments for completeness and forming | ||||||
3542 | /// the function template specialization. | ||||||
3543 | /// | ||||||
3544 | /// \param OriginalCallArgs If non-NULL, the original call arguments against | ||||||
3545 | /// which the deduced argument types should be compared. | ||||||
3546 | Sema::TemplateDeductionResult Sema::FinishTemplateArgumentDeduction( | ||||||
3547 | FunctionTemplateDecl *FunctionTemplate, | ||||||
3548 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
3549 | unsigned NumExplicitlySpecified, FunctionDecl *&Specialization, | ||||||
3550 | TemplateDeductionInfo &Info, | ||||||
3551 | SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs, | ||||||
3552 | bool PartialOverloading, llvm::function_ref<bool()> CheckNonDependent) { | ||||||
3553 | // Unevaluated SFINAE context. | ||||||
3554 | EnterExpressionEvaluationContext Unevaluated( | ||||||
3555 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
3556 | SFINAETrap Trap(*this); | ||||||
3557 | |||||||
3558 | // Enter a new template instantiation context while we instantiate the | ||||||
3559 | // actual function declaration. | ||||||
3560 | SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); | ||||||
3561 | InstantiatingTemplate Inst( | ||||||
3562 | *this, Info.getLocation(), FunctionTemplate, DeducedArgs, | ||||||
3563 | CodeSynthesisContext::DeducedTemplateArgumentSubstitution, Info); | ||||||
3564 | if (Inst.isInvalid()) | ||||||
3565 | return TDK_InstantiationDepth; | ||||||
3566 | |||||||
3567 | ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); | ||||||
3568 | |||||||
3569 | // C++ [temp.deduct.type]p2: | ||||||
3570 | // [...] or if any template argument remains neither deduced nor | ||||||
3571 | // explicitly specified, template argument deduction fails. | ||||||
3572 | SmallVector<TemplateArgument, 4> Builder; | ||||||
3573 | if (auto Result = ConvertDeducedTemplateArguments( | ||||||
3574 | *this, FunctionTemplate, /*IsDeduced*/true, Deduced, Info, Builder, | ||||||
3575 | CurrentInstantiationScope, NumExplicitlySpecified, | ||||||
3576 | PartialOverloading)) | ||||||
3577 | return Result; | ||||||
3578 | |||||||
3579 | // C++ [temp.deduct.call]p10: [DR1391] | ||||||
3580 | // If deduction succeeds for all parameters that contain | ||||||
3581 | // template-parameters that participate in template argument deduction, | ||||||
3582 | // and all template arguments are explicitly specified, deduced, or | ||||||
3583 | // obtained from default template arguments, remaining parameters are then | ||||||
3584 | // compared with the corresponding arguments. For each remaining parameter | ||||||
3585 | // P with a type that was non-dependent before substitution of any | ||||||
3586 | // explicitly-specified template arguments, if the corresponding argument | ||||||
3587 | // A cannot be implicitly converted to P, deduction fails. | ||||||
3588 | if (CheckNonDependent()) | ||||||
3589 | return TDK_NonDependentConversionFailure; | ||||||
3590 | |||||||
3591 | // Form the template argument list from the deduced template arguments. | ||||||
3592 | TemplateArgumentList *DeducedArgumentList | ||||||
3593 | = TemplateArgumentList::CreateCopy(Context, Builder); | ||||||
3594 | Info.reset(DeducedArgumentList); | ||||||
3595 | |||||||
3596 | // Substitute the deduced template arguments into the function template | ||||||
3597 | // declaration to produce the function template specialization. | ||||||
3598 | DeclContext *Owner = FunctionTemplate->getDeclContext(); | ||||||
3599 | if (FunctionTemplate->getFriendObjectKind()) | ||||||
3600 | Owner = FunctionTemplate->getLexicalDeclContext(); | ||||||
3601 | MultiLevelTemplateArgumentList SubstArgs(*DeducedArgumentList); | ||||||
3602 | Specialization = cast_or_null<FunctionDecl>( | ||||||
3603 | SubstDecl(FunctionTemplate->getTemplatedDecl(), Owner, SubstArgs)); | ||||||
3604 | if (!Specialization || Specialization->isInvalidDecl()) | ||||||
3605 | return TDK_SubstitutionFailure; | ||||||
3606 | |||||||
3607 | assert(Specialization->getPrimaryTemplate()->getCanonicalDecl() ==((Specialization->getPrimaryTemplate()->getCanonicalDecl () == FunctionTemplate->getCanonicalDecl()) ? static_cast< void> (0) : __assert_fail ("Specialization->getPrimaryTemplate()->getCanonicalDecl() == FunctionTemplate->getCanonicalDecl()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 3608, __PRETTY_FUNCTION__)) | ||||||
3608 | FunctionTemplate->getCanonicalDecl())((Specialization->getPrimaryTemplate()->getCanonicalDecl () == FunctionTemplate->getCanonicalDecl()) ? static_cast< void> (0) : __assert_fail ("Specialization->getPrimaryTemplate()->getCanonicalDecl() == FunctionTemplate->getCanonicalDecl()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 3608, __PRETTY_FUNCTION__)); | ||||||
3609 | |||||||
3610 | // If the template argument list is owned by the function template | ||||||
3611 | // specialization, release it. | ||||||
3612 | if (Specialization->getTemplateSpecializationArgs() == DeducedArgumentList && | ||||||
3613 | !Trap.hasErrorOccurred()) | ||||||
3614 | Info.take(); | ||||||
3615 | |||||||
3616 | // There may have been an error that did not prevent us from constructing a | ||||||
3617 | // declaration. Mark the declaration invalid and return with a substitution | ||||||
3618 | // failure. | ||||||
3619 | if (Trap.hasErrorOccurred()) { | ||||||
3620 | Specialization->setInvalidDecl(true); | ||||||
3621 | return TDK_SubstitutionFailure; | ||||||
3622 | } | ||||||
3623 | |||||||
3624 | // C++2a [temp.deduct]p5 | ||||||
3625 | // [...] When all template arguments have been deduced [...] all uses of | ||||||
3626 | // template parameters [...] are replaced with the corresponding deduced | ||||||
3627 | // or default argument values. | ||||||
3628 | // [...] If the function template has associated constraints | ||||||
3629 | // ([temp.constr.decl]), those constraints are checked for satisfaction | ||||||
3630 | // ([temp.constr.constr]). If the constraints are not satisfied, type | ||||||
3631 | // deduction fails. | ||||||
3632 | if (!PartialOverloading || | ||||||
3633 | (Builder.size() == FunctionTemplate->getTemplateParameters()->size())) { | ||||||
3634 | if (CheckInstantiatedFunctionTemplateConstraints(Info.getLocation(), | ||||||
3635 | Specialization, Builder, Info.AssociatedConstraintsSatisfaction)) | ||||||
3636 | return TDK_MiscellaneousDeductionFailure; | ||||||
3637 | |||||||
3638 | if (!Info.AssociatedConstraintsSatisfaction.IsSatisfied) { | ||||||
3639 | Info.reset(TemplateArgumentList::CreateCopy(Context, Builder)); | ||||||
3640 | return TDK_ConstraintsNotSatisfied; | ||||||
3641 | } | ||||||
3642 | } | ||||||
3643 | |||||||
3644 | if (OriginalCallArgs) { | ||||||
3645 | // C++ [temp.deduct.call]p4: | ||||||
3646 | // In general, the deduction process attempts to find template argument | ||||||
3647 | // values that will make the deduced A identical to A (after the type A | ||||||
3648 | // is transformed as described above). [...] | ||||||
3649 | llvm::SmallDenseMap<std::pair<unsigned, QualType>, QualType> DeducedATypes; | ||||||
3650 | for (unsigned I = 0, N = OriginalCallArgs->size(); I != N; ++I) { | ||||||
3651 | OriginalCallArg OriginalArg = (*OriginalCallArgs)[I]; | ||||||
3652 | |||||||
3653 | auto ParamIdx = OriginalArg.ArgIdx; | ||||||
3654 | if (ParamIdx >= Specialization->getNumParams()) | ||||||
3655 | // FIXME: This presumably means a pack ended up smaller than we | ||||||
3656 | // expected while deducing. Should this not result in deduction | ||||||
3657 | // failure? Can it even happen? | ||||||
3658 | continue; | ||||||
3659 | |||||||
3660 | QualType DeducedA; | ||||||
3661 | if (!OriginalArg.DecomposedParam) { | ||||||
3662 | // P is one of the function parameters, just look up its substituted | ||||||
3663 | // type. | ||||||
3664 | DeducedA = Specialization->getParamDecl(ParamIdx)->getType(); | ||||||
3665 | } else { | ||||||
3666 | // P is a decomposed element of a parameter corresponding to a | ||||||
3667 | // braced-init-list argument. Substitute back into P to find the | ||||||
3668 | // deduced A. | ||||||
3669 | QualType &CacheEntry = | ||||||
3670 | DeducedATypes[{ParamIdx, OriginalArg.OriginalParamType}]; | ||||||
3671 | if (CacheEntry.isNull()) { | ||||||
3672 | ArgumentPackSubstitutionIndexRAII PackIndex( | ||||||
3673 | *this, getPackIndexForParam(*this, FunctionTemplate, SubstArgs, | ||||||
3674 | ParamIdx)); | ||||||
3675 | CacheEntry = | ||||||
3676 | SubstType(OriginalArg.OriginalParamType, SubstArgs, | ||||||
3677 | Specialization->getTypeSpecStartLoc(), | ||||||
3678 | Specialization->getDeclName()); | ||||||
3679 | } | ||||||
3680 | DeducedA = CacheEntry; | ||||||
3681 | } | ||||||
3682 | |||||||
3683 | if (auto TDK = | ||||||
3684 | CheckOriginalCallArgDeduction(*this, Info, OriginalArg, DeducedA)) | ||||||
3685 | return TDK; | ||||||
3686 | } | ||||||
3687 | } | ||||||
3688 | |||||||
3689 | // If we suppressed any diagnostics while performing template argument | ||||||
3690 | // deduction, and if we haven't already instantiated this declaration, | ||||||
3691 | // keep track of these diagnostics. They'll be emitted if this specialization | ||||||
3692 | // is actually used. | ||||||
3693 | if (Info.diag_begin() != Info.diag_end()) { | ||||||
3694 | SuppressedDiagnosticsMap::iterator | ||||||
3695 | Pos = SuppressedDiagnostics.find(Specialization->getCanonicalDecl()); | ||||||
3696 | if (Pos == SuppressedDiagnostics.end()) | ||||||
3697 | SuppressedDiagnostics[Specialization->getCanonicalDecl()] | ||||||
3698 | .append(Info.diag_begin(), Info.diag_end()); | ||||||
3699 | } | ||||||
3700 | |||||||
3701 | return TDK_Success; | ||||||
3702 | } | ||||||
3703 | |||||||
3704 | /// Gets the type of a function for template-argument-deducton | ||||||
3705 | /// purposes when it's considered as part of an overload set. | ||||||
3706 | static QualType GetTypeOfFunction(Sema &S, const OverloadExpr::FindResult &R, | ||||||
3707 | FunctionDecl *Fn) { | ||||||
3708 | // We may need to deduce the return type of the function now. | ||||||
3709 | if (S.getLangOpts().CPlusPlus14 && Fn->getReturnType()->isUndeducedType() && | ||||||
3710 | S.DeduceReturnType(Fn, R.Expression->getExprLoc(), /*Diagnose*/ false)) | ||||||
3711 | return {}; | ||||||
3712 | |||||||
3713 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Fn)) | ||||||
3714 | if (Method->isInstance()) { | ||||||
3715 | // An instance method that's referenced in a form that doesn't | ||||||
3716 | // look like a member pointer is just invalid. | ||||||
3717 | if (!R.HasFormOfMemberPointer) | ||||||
3718 | return {}; | ||||||
3719 | |||||||
3720 | return S.Context.getMemberPointerType(Fn->getType(), | ||||||
3721 | S.Context.getTypeDeclType(Method->getParent()).getTypePtr()); | ||||||
3722 | } | ||||||
3723 | |||||||
3724 | if (!R.IsAddressOfOperand) return Fn->getType(); | ||||||
3725 | return S.Context.getPointerType(Fn->getType()); | ||||||
3726 | } | ||||||
3727 | |||||||
3728 | /// Apply the deduction rules for overload sets. | ||||||
3729 | /// | ||||||
3730 | /// \return the null type if this argument should be treated as an | ||||||
3731 | /// undeduced context | ||||||
3732 | static QualType | ||||||
3733 | ResolveOverloadForDeduction(Sema &S, TemplateParameterList *TemplateParams, | ||||||
3734 | Expr *Arg, QualType ParamType, | ||||||
3735 | bool ParamWasReference) { | ||||||
3736 | |||||||
3737 | OverloadExpr::FindResult R = OverloadExpr::find(Arg); | ||||||
3738 | |||||||
3739 | OverloadExpr *Ovl = R.Expression; | ||||||
3740 | |||||||
3741 | // C++0x [temp.deduct.call]p4 | ||||||
3742 | unsigned TDF = 0; | ||||||
3743 | if (ParamWasReference) | ||||||
3744 | TDF |= TDF_ParamWithReferenceType; | ||||||
3745 | if (R.IsAddressOfOperand) | ||||||
3746 | TDF |= TDF_IgnoreQualifiers; | ||||||
3747 | |||||||
3748 | // C++0x [temp.deduct.call]p6: | ||||||
3749 | // When P is a function type, pointer to function type, or pointer | ||||||
3750 | // to member function type: | ||||||
3751 | |||||||
3752 | if (!ParamType->isFunctionType() && | ||||||
3753 | !ParamType->isFunctionPointerType() && | ||||||
3754 | !ParamType->isMemberFunctionPointerType()) { | ||||||
3755 | if (Ovl->hasExplicitTemplateArgs()) { | ||||||
3756 | // But we can still look for an explicit specialization. | ||||||
3757 | if (FunctionDecl *ExplicitSpec | ||||||
3758 | = S.ResolveSingleFunctionTemplateSpecialization(Ovl)) | ||||||
3759 | return GetTypeOfFunction(S, R, ExplicitSpec); | ||||||
3760 | } | ||||||
3761 | |||||||
3762 | DeclAccessPair DAP; | ||||||
3763 | if (FunctionDecl *Viable = | ||||||
3764 | S.resolveAddressOfSingleOverloadCandidate(Arg, DAP)) | ||||||
3765 | return GetTypeOfFunction(S, R, Viable); | ||||||
3766 | |||||||
3767 | return {}; | ||||||
3768 | } | ||||||
3769 | |||||||
3770 | // Gather the explicit template arguments, if any. | ||||||
3771 | TemplateArgumentListInfo ExplicitTemplateArgs; | ||||||
3772 | if (Ovl->hasExplicitTemplateArgs()) | ||||||
3773 | Ovl->copyTemplateArgumentsInto(ExplicitTemplateArgs); | ||||||
3774 | QualType Match; | ||||||
3775 | for (UnresolvedSetIterator I = Ovl->decls_begin(), | ||||||
3776 | E = Ovl->decls_end(); I != E; ++I) { | ||||||
3777 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||
3778 | |||||||
3779 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) { | ||||||
3780 | // - If the argument is an overload set containing one or more | ||||||
3781 | // function templates, the parameter is treated as a | ||||||
3782 | // non-deduced context. | ||||||
3783 | if (!Ovl->hasExplicitTemplateArgs()) | ||||||
3784 | return {}; | ||||||
3785 | |||||||
3786 | // Otherwise, see if we can resolve a function type | ||||||
3787 | FunctionDecl *Specialization = nullptr; | ||||||
3788 | TemplateDeductionInfo Info(Ovl->getNameLoc()); | ||||||
3789 | if (S.DeduceTemplateArguments(FunTmpl, &ExplicitTemplateArgs, | ||||||
3790 | Specialization, Info)) | ||||||
3791 | continue; | ||||||
3792 | |||||||
3793 | D = Specialization; | ||||||
3794 | } | ||||||
3795 | |||||||
3796 | FunctionDecl *Fn = cast<FunctionDecl>(D); | ||||||
3797 | QualType ArgType = GetTypeOfFunction(S, R, Fn); | ||||||
3798 | if (ArgType.isNull()) continue; | ||||||
3799 | |||||||
3800 | // Function-to-pointer conversion. | ||||||
3801 | if (!ParamWasReference && ParamType->isPointerType() && | ||||||
3802 | ArgType->isFunctionType()) | ||||||
3803 | ArgType = S.Context.getPointerType(ArgType); | ||||||
3804 | |||||||
3805 | // - If the argument is an overload set (not containing function | ||||||
3806 | // templates), trial argument deduction is attempted using each | ||||||
3807 | // of the members of the set. If deduction succeeds for only one | ||||||
3808 | // of the overload set members, that member is used as the | ||||||
3809 | // argument value for the deduction. If deduction succeeds for | ||||||
3810 | // more than one member of the overload set the parameter is | ||||||
3811 | // treated as a non-deduced context. | ||||||
3812 | |||||||
3813 | // We do all of this in a fresh context per C++0x [temp.deduct.type]p2: | ||||||
3814 | // Type deduction is done independently for each P/A pair, and | ||||||
3815 | // the deduced template argument values are then combined. | ||||||
3816 | // So we do not reject deductions which were made elsewhere. | ||||||
3817 | SmallVector<DeducedTemplateArgument, 8> | ||||||
3818 | Deduced(TemplateParams->size()); | ||||||
3819 | TemplateDeductionInfo Info(Ovl->getNameLoc()); | ||||||
3820 | Sema::TemplateDeductionResult Result | ||||||
3821 | = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, ParamType, | ||||||
3822 | ArgType, Info, Deduced, TDF); | ||||||
3823 | if (Result) continue; | ||||||
3824 | if (!Match.isNull()) | ||||||
3825 | return {}; | ||||||
3826 | Match = ArgType; | ||||||
3827 | } | ||||||
3828 | |||||||
3829 | return Match; | ||||||
3830 | } | ||||||
3831 | |||||||
3832 | /// Perform the adjustments to the parameter and argument types | ||||||
3833 | /// described in C++ [temp.deduct.call]. | ||||||
3834 | /// | ||||||
3835 | /// \returns true if the caller should not attempt to perform any template | ||||||
3836 | /// argument deduction based on this P/A pair because the argument is an | ||||||
3837 | /// overloaded function set that could not be resolved. | ||||||
3838 | static bool AdjustFunctionParmAndArgTypesForDeduction( | ||||||
3839 | Sema &S, TemplateParameterList *TemplateParams, unsigned FirstInnerIndex, | ||||||
3840 | QualType &ParamType, QualType &ArgType, Expr *Arg, unsigned &TDF) { | ||||||
3841 | // C++0x [temp.deduct.call]p3: | ||||||
3842 | // If P is a cv-qualified type, the top level cv-qualifiers of P's type | ||||||
3843 | // are ignored for type deduction. | ||||||
3844 | if (ParamType.hasQualifiers()) | ||||||
3845 | ParamType = ParamType.getUnqualifiedType(); | ||||||
3846 | |||||||
3847 | // [...] If P is a reference type, the type referred to by P is | ||||||
3848 | // used for type deduction. | ||||||
3849 | const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>(); | ||||||
3850 | if (ParamRefType
| ||||||
3851 | ParamType = ParamRefType->getPointeeType(); | ||||||
3852 | |||||||
3853 | // Overload sets usually make this parameter an undeduced context, | ||||||
3854 | // but there are sometimes special circumstances. Typically | ||||||
3855 | // involving a template-id-expr. | ||||||
3856 | if (ArgType == S.Context.OverloadTy) { | ||||||
3857 | ArgType = ResolveOverloadForDeduction(S, TemplateParams, | ||||||
3858 | Arg, ParamType, | ||||||
3859 | ParamRefType != nullptr); | ||||||
3860 | if (ArgType.isNull()) | ||||||
3861 | return true; | ||||||
3862 | } | ||||||
3863 | |||||||
3864 | if (ParamRefType
| ||||||
3865 | // If the argument has incomplete array type, try to complete its type. | ||||||
3866 | if (ArgType->isIncompleteArrayType()) | ||||||
3867 | ArgType = S.getCompletedType(Arg); | ||||||
3868 | |||||||
3869 | // C++1z [temp.deduct.call]p3: | ||||||
3870 | // If P is a forwarding reference and the argument is an lvalue, the type | ||||||
3871 | // "lvalue reference to A" is used in place of A for type deduction. | ||||||
3872 | if (isForwardingReference(QualType(ParamRefType, 0), FirstInnerIndex) && | ||||||
3873 | Arg->isLValue()) { | ||||||
3874 | if (S.getLangOpts().OpenCL && !ArgType.hasAddressSpace()) | ||||||
3875 | ArgType = S.Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic); | ||||||
3876 | ArgType = S.Context.getLValueReferenceType(ArgType); | ||||||
3877 | } | ||||||
3878 | } else { | ||||||
3879 | // C++ [temp.deduct.call]p2: | ||||||
3880 | // If P is not a reference type: | ||||||
3881 | // - If A is an array type, the pointer type produced by the | ||||||
3882 | // array-to-pointer standard conversion (4.2) is used in place of | ||||||
3883 | // A for type deduction; otherwise, | ||||||
3884 | if (ArgType->isArrayType()) | ||||||
3885 | ArgType = S.Context.getArrayDecayedType(ArgType); | ||||||
3886 | // - If A is a function type, the pointer type produced by the | ||||||
3887 | // function-to-pointer standard conversion (4.3) is used in place | ||||||
3888 | // of A for type deduction; otherwise, | ||||||
3889 | else if (ArgType->isFunctionType()) | ||||||
3890 | ArgType = S.Context.getPointerType(ArgType); | ||||||
3891 | else { | ||||||
3892 | // - If A is a cv-qualified type, the top level cv-qualifiers of A's | ||||||
3893 | // type are ignored for type deduction. | ||||||
3894 | ArgType = ArgType.getUnqualifiedType(); | ||||||
3895 | } | ||||||
3896 | } | ||||||
3897 | |||||||
3898 | // C++0x [temp.deduct.call]p4: | ||||||
3899 | // In general, the deduction process attempts to find template argument | ||||||
3900 | // values that will make the deduced A identical to A (after the type A | ||||||
3901 | // is transformed as described above). [...] | ||||||
3902 | TDF = TDF_SkipNonDependent; | ||||||
3903 | |||||||
3904 | // - If the original P is a reference type, the deduced A (i.e., the | ||||||
3905 | // type referred to by the reference) can be more cv-qualified than | ||||||
3906 | // the transformed A. | ||||||
3907 | if (ParamRefType
| ||||||
3908 | TDF |= TDF_ParamWithReferenceType; | ||||||
3909 | // - The transformed A can be another pointer or pointer to member | ||||||
3910 | // type that can be converted to the deduced A via a qualification | ||||||
3911 | // conversion (4.4). | ||||||
3912 | if (ArgType->isPointerType() || ArgType->isMemberPointerType() || | ||||||
3913 | ArgType->isObjCObjectPointerType()) | ||||||
3914 | TDF |= TDF_IgnoreQualifiers; | ||||||
3915 | // - If P is a class and P has the form simple-template-id, then the | ||||||
3916 | // transformed A can be a derived class of the deduced A. Likewise, | ||||||
3917 | // if P is a pointer to a class of the form simple-template-id, the | ||||||
3918 | // transformed A can be a pointer to a derived class pointed to by | ||||||
3919 | // the deduced A. | ||||||
3920 | if (isSimpleTemplateIdType(ParamType) || | ||||||
3921 | (isa<PointerType>(ParamType) && | ||||||
3922 | isSimpleTemplateIdType( | ||||||
3923 | ParamType->getAs<PointerType>()->getPointeeType()))) | ||||||
| |||||||
3924 | TDF |= TDF_DerivedClass; | ||||||
3925 | |||||||
3926 | return false; | ||||||
3927 | } | ||||||
3928 | |||||||
3929 | static bool | ||||||
3930 | hasDeducibleTemplateParameters(Sema &S, FunctionTemplateDecl *FunctionTemplate, | ||||||
3931 | QualType T); | ||||||
3932 | |||||||
3933 | static Sema::TemplateDeductionResult DeduceTemplateArgumentsFromCallArgument( | ||||||
3934 | Sema &S, TemplateParameterList *TemplateParams, unsigned FirstInnerIndex, | ||||||
3935 | QualType ParamType, Expr *Arg, TemplateDeductionInfo &Info, | ||||||
3936 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
3937 | SmallVectorImpl<Sema::OriginalCallArg> &OriginalCallArgs, | ||||||
3938 | bool DecomposedParam, unsigned ArgIdx, unsigned TDF); | ||||||
3939 | |||||||
3940 | /// Attempt template argument deduction from an initializer list | ||||||
3941 | /// deemed to be an argument in a function call. | ||||||
3942 | static Sema::TemplateDeductionResult DeduceFromInitializerList( | ||||||
3943 | Sema &S, TemplateParameterList *TemplateParams, QualType AdjustedParamType, | ||||||
3944 | InitListExpr *ILE, TemplateDeductionInfo &Info, | ||||||
3945 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
3946 | SmallVectorImpl<Sema::OriginalCallArg> &OriginalCallArgs, unsigned ArgIdx, | ||||||
3947 | unsigned TDF) { | ||||||
3948 | // C++ [temp.deduct.call]p1: (CWG 1591) | ||||||
3949 | // If removing references and cv-qualifiers from P gives | ||||||
3950 | // std::initializer_list<P0> or P0[N] for some P0 and N and the argument is | ||||||
3951 | // a non-empty initializer list, then deduction is performed instead for | ||||||
3952 | // each element of the initializer list, taking P0 as a function template | ||||||
3953 | // parameter type and the initializer element as its argument | ||||||
3954 | // | ||||||
3955 | // We've already removed references and cv-qualifiers here. | ||||||
3956 | if (!ILE->getNumInits()) | ||||||
3957 | return Sema::TDK_Success; | ||||||
3958 | |||||||
3959 | QualType ElTy; | ||||||
3960 | auto *ArrTy = S.Context.getAsArrayType(AdjustedParamType); | ||||||
3961 | if (ArrTy) | ||||||
3962 | ElTy = ArrTy->getElementType(); | ||||||
3963 | else if (!S.isStdInitializerList(AdjustedParamType, &ElTy)) { | ||||||
3964 | // Otherwise, an initializer list argument causes the parameter to be | ||||||
3965 | // considered a non-deduced context | ||||||
3966 | return Sema::TDK_Success; | ||||||
3967 | } | ||||||
3968 | |||||||
3969 | // Resolving a core issue: a braced-init-list containing any designators is | ||||||
3970 | // a non-deduced context. | ||||||
3971 | for (Expr *E : ILE->inits()) | ||||||
3972 | if (isa<DesignatedInitExpr>(E)) | ||||||
3973 | return Sema::TDK_Success; | ||||||
3974 | |||||||
3975 | // Deduction only needs to be done for dependent types. | ||||||
3976 | if (ElTy->isDependentType()) { | ||||||
3977 | for (Expr *E : ILE->inits()) { | ||||||
3978 | if (auto Result = DeduceTemplateArgumentsFromCallArgument( | ||||||
3979 | S, TemplateParams, 0, ElTy, E, Info, Deduced, OriginalCallArgs, true, | ||||||
3980 | ArgIdx, TDF)) | ||||||
3981 | return Result; | ||||||
3982 | } | ||||||
3983 | } | ||||||
3984 | |||||||
3985 | // in the P0[N] case, if N is a non-type template parameter, N is deduced | ||||||
3986 | // from the length of the initializer list. | ||||||
3987 | if (auto *DependentArrTy = dyn_cast_or_null<DependentSizedArrayType>(ArrTy)) { | ||||||
3988 | // Determine the array bound is something we can deduce. | ||||||
3989 | if (const NonTypeTemplateParmDecl *NTTP = | ||||||
3990 | getDeducedParameterFromExpr(Info, DependentArrTy->getSizeExpr())) { | ||||||
3991 | // We can perform template argument deduction for the given non-type | ||||||
3992 | // template parameter. | ||||||
3993 | // C++ [temp.deduct.type]p13: | ||||||
3994 | // The type of N in the type T[N] is std::size_t. | ||||||
3995 | QualType T = S.Context.getSizeType(); | ||||||
3996 | llvm::APInt Size(S.Context.getIntWidth(T), ILE->getNumInits()); | ||||||
3997 | if (auto Result = DeduceNonTypeTemplateArgument( | ||||||
3998 | S, TemplateParams, NTTP, llvm::APSInt(Size), T, | ||||||
3999 | /*ArrayBound=*/true, Info, Deduced)) | ||||||
4000 | return Result; | ||||||
4001 | } | ||||||
4002 | } | ||||||
4003 | |||||||
4004 | return Sema::TDK_Success; | ||||||
4005 | } | ||||||
4006 | |||||||
4007 | /// Perform template argument deduction per [temp.deduct.call] for a | ||||||
4008 | /// single parameter / argument pair. | ||||||
4009 | static Sema::TemplateDeductionResult DeduceTemplateArgumentsFromCallArgument( | ||||||
4010 | Sema &S, TemplateParameterList *TemplateParams, unsigned FirstInnerIndex, | ||||||
4011 | QualType ParamType, Expr *Arg, TemplateDeductionInfo &Info, | ||||||
4012 | SmallVectorImpl<DeducedTemplateArgument> &Deduced, | ||||||
4013 | SmallVectorImpl<Sema::OriginalCallArg> &OriginalCallArgs, | ||||||
4014 | bool DecomposedParam, unsigned ArgIdx, unsigned TDF) { | ||||||
4015 | QualType ArgType = Arg->getType(); | ||||||
4016 | QualType OrigParamType = ParamType; | ||||||
4017 | |||||||
4018 | // If P is a reference type [...] | ||||||
4019 | // If P is a cv-qualified type [...] | ||||||
4020 | if (AdjustFunctionParmAndArgTypesForDeduction( | ||||||
4021 | S, TemplateParams, FirstInnerIndex, ParamType, ArgType, Arg, TDF)) | ||||||
4022 | return Sema::TDK_Success; | ||||||
4023 | |||||||
4024 | // If [...] the argument is a non-empty initializer list [...] | ||||||
4025 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Arg)) | ||||||
4026 | return DeduceFromInitializerList(S, TemplateParams, ParamType, ILE, Info, | ||||||
4027 | Deduced, OriginalCallArgs, ArgIdx, TDF); | ||||||
4028 | |||||||
4029 | // [...] the deduction process attempts to find template argument values | ||||||
4030 | // that will make the deduced A identical to A | ||||||
4031 | // | ||||||
4032 | // Keep track of the argument type and corresponding parameter index, | ||||||
4033 | // so we can check for compatibility between the deduced A and A. | ||||||
4034 | OriginalCallArgs.push_back( | ||||||
4035 | Sema::OriginalCallArg(OrigParamType, DecomposedParam, ArgIdx, ArgType)); | ||||||
4036 | return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, ParamType, | ||||||
4037 | ArgType, Info, Deduced, TDF); | ||||||
4038 | } | ||||||
4039 | |||||||
4040 | /// Perform template argument deduction from a function call | ||||||
4041 | /// (C++ [temp.deduct.call]). | ||||||
4042 | /// | ||||||
4043 | /// \param FunctionTemplate the function template for which we are performing | ||||||
4044 | /// template argument deduction. | ||||||
4045 | /// | ||||||
4046 | /// \param ExplicitTemplateArgs the explicit template arguments provided | ||||||
4047 | /// for this call. | ||||||
4048 | /// | ||||||
4049 | /// \param Args the function call arguments | ||||||
4050 | /// | ||||||
4051 | /// \param Specialization if template argument deduction was successful, | ||||||
4052 | /// this will be set to the function template specialization produced by | ||||||
4053 | /// template argument deduction. | ||||||
4054 | /// | ||||||
4055 | /// \param Info the argument will be updated to provide additional information | ||||||
4056 | /// about template argument deduction. | ||||||
4057 | /// | ||||||
4058 | /// \param CheckNonDependent A callback to invoke to check conversions for | ||||||
4059 | /// non-dependent parameters, between deduction and substitution, per DR1391. | ||||||
4060 | /// If this returns true, substitution will be skipped and we return | ||||||
4061 | /// TDK_NonDependentConversionFailure. The callback is passed the parameter | ||||||
4062 | /// types (after substituting explicit template arguments). | ||||||
4063 | /// | ||||||
4064 | /// \returns the result of template argument deduction. | ||||||
4065 | Sema::TemplateDeductionResult Sema::DeduceTemplateArguments( | ||||||
4066 | FunctionTemplateDecl *FunctionTemplate, | ||||||
4067 | TemplateArgumentListInfo *ExplicitTemplateArgs, ArrayRef<Expr *> Args, | ||||||
4068 | FunctionDecl *&Specialization, TemplateDeductionInfo &Info, | ||||||
4069 | bool PartialOverloading, | ||||||
4070 | llvm::function_ref<bool(ArrayRef<QualType>)> CheckNonDependent) { | ||||||
4071 | if (FunctionTemplate->isInvalidDecl()) | ||||||
4072 | return TDK_Invalid; | ||||||
4073 | |||||||
4074 | FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); | ||||||
4075 | unsigned NumParams = Function->getNumParams(); | ||||||
4076 | |||||||
4077 | unsigned FirstInnerIndex = getFirstInnerIndex(FunctionTemplate); | ||||||
4078 | |||||||
4079 | // C++ [temp.deduct.call]p1: | ||||||
4080 | // Template argument deduction is done by comparing each function template | ||||||
4081 | // parameter type (call it P) with the type of the corresponding argument | ||||||
4082 | // of the call (call it A) as described below. | ||||||
4083 | if (Args.size() < Function->getMinRequiredArguments() && !PartialOverloading) | ||||||
4084 | return TDK_TooFewArguments; | ||||||
4085 | else if (TooManyArguments(NumParams, Args.size(), PartialOverloading)) { | ||||||
4086 | const auto *Proto = Function->getType()->castAs<FunctionProtoType>(); | ||||||
4087 | if (Proto->isTemplateVariadic()) | ||||||
4088 | /* Do nothing */; | ||||||
4089 | else if (!Proto->isVariadic()) | ||||||
4090 | return TDK_TooManyArguments; | ||||||
4091 | } | ||||||
4092 | |||||||
4093 | // The types of the parameters from which we will perform template argument | ||||||
4094 | // deduction. | ||||||
4095 | LocalInstantiationScope InstScope(*this); | ||||||
4096 | TemplateParameterList *TemplateParams | ||||||
4097 | = FunctionTemplate->getTemplateParameters(); | ||||||
4098 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
4099 | SmallVector<QualType, 8> ParamTypes; | ||||||
4100 | unsigned NumExplicitlySpecified = 0; | ||||||
4101 | if (ExplicitTemplateArgs) { | ||||||
4102 | TemplateDeductionResult Result; | ||||||
4103 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
4104 | Result = SubstituteExplicitTemplateArguments( | ||||||
4105 | FunctionTemplate, *ExplicitTemplateArgs, Deduced, ParamTypes, nullptr, | ||||||
4106 | Info); | ||||||
4107 | }); | ||||||
4108 | if (Result) | ||||||
4109 | return Result; | ||||||
4110 | |||||||
4111 | NumExplicitlySpecified = Deduced.size(); | ||||||
4112 | } else { | ||||||
4113 | // Just fill in the parameter types from the function declaration. | ||||||
4114 | for (unsigned I = 0; I != NumParams; ++I) | ||||||
4115 | ParamTypes.push_back(Function->getParamDecl(I)->getType()); | ||||||
4116 | } | ||||||
4117 | |||||||
4118 | SmallVector<OriginalCallArg, 8> OriginalCallArgs; | ||||||
4119 | |||||||
4120 | // Deduce an argument of type ParamType from an expression with index ArgIdx. | ||||||
4121 | auto DeduceCallArgument = [&](QualType ParamType, unsigned ArgIdx) { | ||||||
4122 | // C++ [demp.deduct.call]p1: (DR1391) | ||||||
4123 | // Template argument deduction is done by comparing each function template | ||||||
4124 | // parameter that contains template-parameters that participate in | ||||||
4125 | // template argument deduction ... | ||||||
4126 | if (!hasDeducibleTemplateParameters(*this, FunctionTemplate, ParamType)) | ||||||
4127 | return Sema::TDK_Success; | ||||||
4128 | |||||||
4129 | // ... with the type of the corresponding argument | ||||||
4130 | return DeduceTemplateArgumentsFromCallArgument( | ||||||
4131 | *this, TemplateParams, FirstInnerIndex, ParamType, Args[ArgIdx], Info, Deduced, | ||||||
4132 | OriginalCallArgs, /*Decomposed*/false, ArgIdx, /*TDF*/ 0); | ||||||
4133 | }; | ||||||
4134 | |||||||
4135 | // Deduce template arguments from the function parameters. | ||||||
4136 | Deduced.resize(TemplateParams->size()); | ||||||
4137 | SmallVector<QualType, 8> ParamTypesForArgChecking; | ||||||
4138 | for (unsigned ParamIdx = 0, NumParamTypes = ParamTypes.size(), ArgIdx = 0; | ||||||
4139 | ParamIdx != NumParamTypes; ++ParamIdx) { | ||||||
4140 | QualType ParamType = ParamTypes[ParamIdx]; | ||||||
4141 | |||||||
4142 | const PackExpansionType *ParamExpansion = | ||||||
4143 | dyn_cast<PackExpansionType>(ParamType); | ||||||
4144 | if (!ParamExpansion) { | ||||||
4145 | // Simple case: matching a function parameter to a function argument. | ||||||
4146 | if (ArgIdx >= Args.size()) | ||||||
4147 | break; | ||||||
4148 | |||||||
4149 | ParamTypesForArgChecking.push_back(ParamType); | ||||||
4150 | if (auto Result = DeduceCallArgument(ParamType, ArgIdx++)) | ||||||
4151 | return Result; | ||||||
4152 | |||||||
4153 | continue; | ||||||
4154 | } | ||||||
4155 | |||||||
4156 | QualType ParamPattern = ParamExpansion->getPattern(); | ||||||
4157 | PackDeductionScope PackScope(*this, TemplateParams, Deduced, Info, | ||||||
4158 | ParamPattern); | ||||||
4159 | |||||||
4160 | // C++0x [temp.deduct.call]p1: | ||||||
4161 | // For a function parameter pack that occurs at the end of the | ||||||
4162 | // parameter-declaration-list, the type A of each remaining argument of | ||||||
4163 | // the call is compared with the type P of the declarator-id of the | ||||||
4164 | // function parameter pack. Each comparison deduces template arguments | ||||||
4165 | // for subsequent positions in the template parameter packs expanded by | ||||||
4166 | // the function parameter pack. When a function parameter pack appears | ||||||
4167 | // in a non-deduced context [not at the end of the list], the type of | ||||||
4168 | // that parameter pack is never deduced. | ||||||
4169 | // | ||||||
4170 | // FIXME: The above rule allows the size of the parameter pack to change | ||||||
4171 | // after we skip it (in the non-deduced case). That makes no sense, so | ||||||
4172 | // we instead notionally deduce the pack against N arguments, where N is | ||||||
4173 | // the length of the explicitly-specified pack if it's expanded by the | ||||||
4174 | // parameter pack and 0 otherwise, and we treat each deduction as a | ||||||
4175 | // non-deduced context. | ||||||
4176 | if (ParamIdx + 1 == NumParamTypes || PackScope.hasFixedArity()) { | ||||||
4177 | for (; ArgIdx < Args.size() && PackScope.hasNextElement(); | ||||||
4178 | PackScope.nextPackElement(), ++ArgIdx) { | ||||||
4179 | ParamTypesForArgChecking.push_back(ParamPattern); | ||||||
4180 | if (auto Result = DeduceCallArgument(ParamPattern, ArgIdx)) | ||||||
4181 | return Result; | ||||||
4182 | } | ||||||
4183 | } else { | ||||||
4184 | // If the parameter type contains an explicitly-specified pack that we | ||||||
4185 | // could not expand, skip the number of parameters notionally created | ||||||
4186 | // by the expansion. | ||||||
4187 | Optional<unsigned> NumExpansions = ParamExpansion->getNumExpansions(); | ||||||
4188 | if (NumExpansions && !PackScope.isPartiallyExpanded()) { | ||||||
4189 | for (unsigned I = 0; I != *NumExpansions && ArgIdx < Args.size(); | ||||||
4190 | ++I, ++ArgIdx) { | ||||||
4191 | ParamTypesForArgChecking.push_back(ParamPattern); | ||||||
4192 | // FIXME: Should we add OriginalCallArgs for these? What if the | ||||||
4193 | // corresponding argument is a list? | ||||||
4194 | PackScope.nextPackElement(); | ||||||
4195 | } | ||||||
4196 | } | ||||||
4197 | } | ||||||
4198 | |||||||
4199 | // Build argument packs for each of the parameter packs expanded by this | ||||||
4200 | // pack expansion. | ||||||
4201 | if (auto Result = PackScope.finish()) | ||||||
4202 | return Result; | ||||||
4203 | } | ||||||
4204 | |||||||
4205 | // Capture the context in which the function call is made. This is the context | ||||||
4206 | // that is needed when the accessibility of template arguments is checked. | ||||||
4207 | DeclContext *CallingCtx = CurContext; | ||||||
4208 | |||||||
4209 | TemplateDeductionResult Result; | ||||||
4210 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
4211 | Result = FinishTemplateArgumentDeduction( | ||||||
4212 | FunctionTemplate, Deduced, NumExplicitlySpecified, Specialization, Info, | ||||||
4213 | &OriginalCallArgs, PartialOverloading, [&, CallingCtx]() { | ||||||
4214 | ContextRAII SavedContext(*this, CallingCtx); | ||||||
4215 | return CheckNonDependent(ParamTypesForArgChecking); | ||||||
4216 | }); | ||||||
4217 | }); | ||||||
4218 | return Result; | ||||||
4219 | } | ||||||
4220 | |||||||
4221 | QualType Sema::adjustCCAndNoReturn(QualType ArgFunctionType, | ||||||
4222 | QualType FunctionType, | ||||||
4223 | bool AdjustExceptionSpec) { | ||||||
4224 | if (ArgFunctionType.isNull()) | ||||||
4225 | return ArgFunctionType; | ||||||
4226 | |||||||
4227 | const auto *FunctionTypeP = FunctionType->castAs<FunctionProtoType>(); | ||||||
4228 | const auto *ArgFunctionTypeP = ArgFunctionType->castAs<FunctionProtoType>(); | ||||||
4229 | FunctionProtoType::ExtProtoInfo EPI = ArgFunctionTypeP->getExtProtoInfo(); | ||||||
4230 | bool Rebuild = false; | ||||||
4231 | |||||||
4232 | CallingConv CC = FunctionTypeP->getCallConv(); | ||||||
4233 | if (EPI.ExtInfo.getCC() != CC) { | ||||||
4234 | EPI.ExtInfo = EPI.ExtInfo.withCallingConv(CC); | ||||||
4235 | Rebuild = true; | ||||||
4236 | } | ||||||
4237 | |||||||
4238 | bool NoReturn = FunctionTypeP->getNoReturnAttr(); | ||||||
4239 | if (EPI.ExtInfo.getNoReturn() != NoReturn) { | ||||||
4240 | EPI.ExtInfo = EPI.ExtInfo.withNoReturn(NoReturn); | ||||||
4241 | Rebuild = true; | ||||||
4242 | } | ||||||
4243 | |||||||
4244 | if (AdjustExceptionSpec && (FunctionTypeP->hasExceptionSpec() || | ||||||
4245 | ArgFunctionTypeP->hasExceptionSpec())) { | ||||||
4246 | EPI.ExceptionSpec = FunctionTypeP->getExtProtoInfo().ExceptionSpec; | ||||||
4247 | Rebuild = true; | ||||||
4248 | } | ||||||
4249 | |||||||
4250 | if (!Rebuild) | ||||||
4251 | return ArgFunctionType; | ||||||
4252 | |||||||
4253 | return Context.getFunctionType(ArgFunctionTypeP->getReturnType(), | ||||||
4254 | ArgFunctionTypeP->getParamTypes(), EPI); | ||||||
4255 | } | ||||||
4256 | |||||||
4257 | /// Deduce template arguments when taking the address of a function | ||||||
4258 | /// template (C++ [temp.deduct.funcaddr]) or matching a specialization to | ||||||
4259 | /// a template. | ||||||
4260 | /// | ||||||
4261 | /// \param FunctionTemplate the function template for which we are performing | ||||||
4262 | /// template argument deduction. | ||||||
4263 | /// | ||||||
4264 | /// \param ExplicitTemplateArgs the explicitly-specified template | ||||||
4265 | /// arguments. | ||||||
4266 | /// | ||||||
4267 | /// \param ArgFunctionType the function type that will be used as the | ||||||
4268 | /// "argument" type (A) when performing template argument deduction from the | ||||||
4269 | /// function template's function type. This type may be NULL, if there is no | ||||||
4270 | /// argument type to compare against, in C++0x [temp.arg.explicit]p3. | ||||||
4271 | /// | ||||||
4272 | /// \param Specialization if template argument deduction was successful, | ||||||
4273 | /// this will be set to the function template specialization produced by | ||||||
4274 | /// template argument deduction. | ||||||
4275 | /// | ||||||
4276 | /// \param Info the argument will be updated to provide additional information | ||||||
4277 | /// about template argument deduction. | ||||||
4278 | /// | ||||||
4279 | /// \param IsAddressOfFunction If \c true, we are deducing as part of taking | ||||||
4280 | /// the address of a function template per [temp.deduct.funcaddr] and | ||||||
4281 | /// [over.over]. If \c false, we are looking up a function template | ||||||
4282 | /// specialization based on its signature, per [temp.deduct.decl]. | ||||||
4283 | /// | ||||||
4284 | /// \returns the result of template argument deduction. | ||||||
4285 | Sema::TemplateDeductionResult Sema::DeduceTemplateArguments( | ||||||
4286 | FunctionTemplateDecl *FunctionTemplate, | ||||||
4287 | TemplateArgumentListInfo *ExplicitTemplateArgs, QualType ArgFunctionType, | ||||||
4288 | FunctionDecl *&Specialization, TemplateDeductionInfo &Info, | ||||||
4289 | bool IsAddressOfFunction) { | ||||||
4290 | if (FunctionTemplate->isInvalidDecl()) | ||||||
4291 | return TDK_Invalid; | ||||||
4292 | |||||||
4293 | FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); | ||||||
4294 | TemplateParameterList *TemplateParams | ||||||
4295 | = FunctionTemplate->getTemplateParameters(); | ||||||
4296 | QualType FunctionType = Function->getType(); | ||||||
4297 | |||||||
4298 | // Substitute any explicit template arguments. | ||||||
4299 | LocalInstantiationScope InstScope(*this); | ||||||
4300 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
4301 | unsigned NumExplicitlySpecified = 0; | ||||||
4302 | SmallVector<QualType, 4> ParamTypes; | ||||||
4303 | if (ExplicitTemplateArgs) { | ||||||
4304 | TemplateDeductionResult Result; | ||||||
4305 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
4306 | Result = SubstituteExplicitTemplateArguments( | ||||||
4307 | FunctionTemplate, *ExplicitTemplateArgs, Deduced, ParamTypes, | ||||||
4308 | &FunctionType, Info); | ||||||
4309 | }); | ||||||
4310 | if (Result) | ||||||
4311 | return Result; | ||||||
4312 | |||||||
4313 | NumExplicitlySpecified = Deduced.size(); | ||||||
4314 | } | ||||||
4315 | |||||||
4316 | // When taking the address of a function, we require convertibility of | ||||||
4317 | // the resulting function type. Otherwise, we allow arbitrary mismatches | ||||||
4318 | // of calling convention and noreturn. | ||||||
4319 | if (!IsAddressOfFunction) | ||||||
4320 | ArgFunctionType = adjustCCAndNoReturn(ArgFunctionType, FunctionType, | ||||||
4321 | /*AdjustExceptionSpec*/false); | ||||||
4322 | |||||||
4323 | // Unevaluated SFINAE context. | ||||||
4324 | EnterExpressionEvaluationContext Unevaluated( | ||||||
4325 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
4326 | SFINAETrap Trap(*this); | ||||||
4327 | |||||||
4328 | Deduced.resize(TemplateParams->size()); | ||||||
4329 | |||||||
4330 | // If the function has a deduced return type, substitute it for a dependent | ||||||
4331 | // type so that we treat it as a non-deduced context in what follows. If we | ||||||
4332 | // are looking up by signature, the signature type should also have a deduced | ||||||
4333 | // return type, which we instead expect to exactly match. | ||||||
4334 | bool HasDeducedReturnType = false; | ||||||
4335 | if (getLangOpts().CPlusPlus14 && IsAddressOfFunction && | ||||||
4336 | Function->getReturnType()->getContainedAutoType()) { | ||||||
4337 | FunctionType = SubstAutoType(FunctionType, Context.DependentTy); | ||||||
4338 | HasDeducedReturnType = true; | ||||||
4339 | } | ||||||
4340 | |||||||
4341 | if (!ArgFunctionType.isNull()) { | ||||||
4342 | unsigned TDF = | ||||||
4343 | TDF_TopLevelParameterTypeList | TDF_AllowCompatibleFunctionType; | ||||||
4344 | // Deduce template arguments from the function type. | ||||||
4345 | if (TemplateDeductionResult Result | ||||||
4346 | = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, | ||||||
4347 | FunctionType, ArgFunctionType, | ||||||
4348 | Info, Deduced, TDF)) | ||||||
4349 | return Result; | ||||||
4350 | } | ||||||
4351 | |||||||
4352 | TemplateDeductionResult Result; | ||||||
4353 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
4354 | Result = FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, | ||||||
4355 | NumExplicitlySpecified, | ||||||
4356 | Specialization, Info); | ||||||
4357 | }); | ||||||
4358 | if (Result) | ||||||
4359 | return Result; | ||||||
4360 | |||||||
4361 | // If the function has a deduced return type, deduce it now, so we can check | ||||||
4362 | // that the deduced function type matches the requested type. | ||||||
4363 | if (HasDeducedReturnType && | ||||||
4364 | Specialization->getReturnType()->isUndeducedType() && | ||||||
4365 | DeduceReturnType(Specialization, Info.getLocation(), false)) | ||||||
4366 | return TDK_MiscellaneousDeductionFailure; | ||||||
4367 | |||||||
4368 | // If the function has a dependent exception specification, resolve it now, | ||||||
4369 | // so we can check that the exception specification matches. | ||||||
4370 | auto *SpecializationFPT = | ||||||
4371 | Specialization->getType()->castAs<FunctionProtoType>(); | ||||||
4372 | if (getLangOpts().CPlusPlus17 && | ||||||
4373 | isUnresolvedExceptionSpec(SpecializationFPT->getExceptionSpecType()) && | ||||||
4374 | !ResolveExceptionSpec(Info.getLocation(), SpecializationFPT)) | ||||||
4375 | return TDK_MiscellaneousDeductionFailure; | ||||||
4376 | |||||||
4377 | // Adjust the exception specification of the argument to match the | ||||||
4378 | // substituted and resolved type we just formed. (Calling convention and | ||||||
4379 | // noreturn can't be dependent, so we don't actually need this for them | ||||||
4380 | // right now.) | ||||||
4381 | QualType SpecializationType = Specialization->getType(); | ||||||
4382 | if (!IsAddressOfFunction) | ||||||
4383 | ArgFunctionType = adjustCCAndNoReturn(ArgFunctionType, SpecializationType, | ||||||
4384 | /*AdjustExceptionSpec*/true); | ||||||
4385 | |||||||
4386 | // If the requested function type does not match the actual type of the | ||||||
4387 | // specialization with respect to arguments of compatible pointer to function | ||||||
4388 | // types, template argument deduction fails. | ||||||
4389 | if (!ArgFunctionType.isNull()) { | ||||||
4390 | if (IsAddressOfFunction && | ||||||
4391 | !isSameOrCompatibleFunctionType( | ||||||
4392 | Context.getCanonicalType(SpecializationType), | ||||||
4393 | Context.getCanonicalType(ArgFunctionType))) | ||||||
4394 | return TDK_MiscellaneousDeductionFailure; | ||||||
4395 | |||||||
4396 | if (!IsAddressOfFunction && | ||||||
4397 | !Context.hasSameType(SpecializationType, ArgFunctionType)) | ||||||
4398 | return TDK_MiscellaneousDeductionFailure; | ||||||
4399 | } | ||||||
4400 | |||||||
4401 | return TDK_Success; | ||||||
4402 | } | ||||||
4403 | |||||||
4404 | /// Deduce template arguments for a templated conversion | ||||||
4405 | /// function (C++ [temp.deduct.conv]) and, if successful, produce a | ||||||
4406 | /// conversion function template specialization. | ||||||
4407 | Sema::TemplateDeductionResult | ||||||
4408 | Sema::DeduceTemplateArguments(FunctionTemplateDecl *ConversionTemplate, | ||||||
4409 | QualType ToType, | ||||||
4410 | CXXConversionDecl *&Specialization, | ||||||
4411 | TemplateDeductionInfo &Info) { | ||||||
4412 | if (ConversionTemplate->isInvalidDecl()) | ||||||
4413 | return TDK_Invalid; | ||||||
4414 | |||||||
4415 | CXXConversionDecl *ConversionGeneric | ||||||
4416 | = cast<CXXConversionDecl>(ConversionTemplate->getTemplatedDecl()); | ||||||
4417 | |||||||
4418 | QualType FromType = ConversionGeneric->getConversionType(); | ||||||
4419 | |||||||
4420 | // Canonicalize the types for deduction. | ||||||
4421 | QualType P = Context.getCanonicalType(FromType); | ||||||
4422 | QualType A = Context.getCanonicalType(ToType); | ||||||
4423 | |||||||
4424 | // C++0x [temp.deduct.conv]p2: | ||||||
4425 | // If P is a reference type, the type referred to by P is used for | ||||||
4426 | // type deduction. | ||||||
4427 | if (const ReferenceType *PRef = P->getAs<ReferenceType>()) | ||||||
4428 | P = PRef->getPointeeType(); | ||||||
4429 | |||||||
4430 | // C++0x [temp.deduct.conv]p4: | ||||||
4431 | // [...] If A is a reference type, the type referred to by A is used | ||||||
4432 | // for type deduction. | ||||||
4433 | if (const ReferenceType *ARef = A->getAs<ReferenceType>()) { | ||||||
4434 | A = ARef->getPointeeType(); | ||||||
4435 | // We work around a defect in the standard here: cv-qualifiers are also | ||||||
4436 | // removed from P and A in this case, unless P was a reference type. This | ||||||
4437 | // seems to mostly match what other compilers are doing. | ||||||
4438 | if (!FromType->getAs<ReferenceType>()) { | ||||||
4439 | A = A.getUnqualifiedType(); | ||||||
4440 | P = P.getUnqualifiedType(); | ||||||
4441 | } | ||||||
4442 | |||||||
4443 | // C++ [temp.deduct.conv]p3: | ||||||
4444 | // | ||||||
4445 | // If A is not a reference type: | ||||||
4446 | } else { | ||||||
4447 | assert(!A->isReferenceType() && "Reference types were handled above")((!A->isReferenceType() && "Reference types were handled above" ) ? static_cast<void> (0) : __assert_fail ("!A->isReferenceType() && \"Reference types were handled above\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4447, __PRETTY_FUNCTION__)); | ||||||
4448 | |||||||
4449 | // - If P is an array type, the pointer type produced by the | ||||||
4450 | // array-to-pointer standard conversion (4.2) is used in place | ||||||
4451 | // of P for type deduction; otherwise, | ||||||
4452 | if (P->isArrayType()) | ||||||
4453 | P = Context.getArrayDecayedType(P); | ||||||
4454 | // - If P is a function type, the pointer type produced by the | ||||||
4455 | // function-to-pointer standard conversion (4.3) is used in | ||||||
4456 | // place of P for type deduction; otherwise, | ||||||
4457 | else if (P->isFunctionType()) | ||||||
4458 | P = Context.getPointerType(P); | ||||||
4459 | // - If P is a cv-qualified type, the top level cv-qualifiers of | ||||||
4460 | // P's type are ignored for type deduction. | ||||||
4461 | else | ||||||
4462 | P = P.getUnqualifiedType(); | ||||||
4463 | |||||||
4464 | // C++0x [temp.deduct.conv]p4: | ||||||
4465 | // If A is a cv-qualified type, the top level cv-qualifiers of A's | ||||||
4466 | // type are ignored for type deduction. If A is a reference type, the type | ||||||
4467 | // referred to by A is used for type deduction. | ||||||
4468 | A = A.getUnqualifiedType(); | ||||||
4469 | } | ||||||
4470 | |||||||
4471 | // Unevaluated SFINAE context. | ||||||
4472 | EnterExpressionEvaluationContext Unevaluated( | ||||||
4473 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||
4474 | SFINAETrap Trap(*this); | ||||||
4475 | |||||||
4476 | // C++ [temp.deduct.conv]p1: | ||||||
4477 | // Template argument deduction is done by comparing the return | ||||||
4478 | // type of the template conversion function (call it P) with the | ||||||
4479 | // type that is required as the result of the conversion (call it | ||||||
4480 | // A) as described in 14.8.2.4. | ||||||
4481 | TemplateParameterList *TemplateParams | ||||||
4482 | = ConversionTemplate->getTemplateParameters(); | ||||||
4483 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
4484 | Deduced.resize(TemplateParams->size()); | ||||||
4485 | |||||||
4486 | // C++0x [temp.deduct.conv]p4: | ||||||
4487 | // In general, the deduction process attempts to find template | ||||||
4488 | // argument values that will make the deduced A identical to | ||||||
4489 | // A. However, there are two cases that allow a difference: | ||||||
4490 | unsigned TDF = 0; | ||||||
4491 | // - If the original A is a reference type, A can be more | ||||||
4492 | // cv-qualified than the deduced A (i.e., the type referred to | ||||||
4493 | // by the reference) | ||||||
4494 | if (ToType->isReferenceType()) | ||||||
4495 | TDF |= TDF_ArgWithReferenceType; | ||||||
4496 | // - The deduced A can be another pointer or pointer to member | ||||||
4497 | // type that can be converted to A via a qualification | ||||||
4498 | // conversion. | ||||||
4499 | // | ||||||
4500 | // (C++0x [temp.deduct.conv]p6 clarifies that this only happens when | ||||||
4501 | // both P and A are pointers or member pointers. In this case, we | ||||||
4502 | // just ignore cv-qualifiers completely). | ||||||
4503 | if ((P->isPointerType() && A->isPointerType()) || | ||||||
4504 | (P->isMemberPointerType() && A->isMemberPointerType())) | ||||||
4505 | TDF |= TDF_IgnoreQualifiers; | ||||||
4506 | if (TemplateDeductionResult Result | ||||||
4507 | = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, | ||||||
4508 | P, A, Info, Deduced, TDF)) | ||||||
4509 | return Result; | ||||||
4510 | |||||||
4511 | // Create an Instantiation Scope for finalizing the operator. | ||||||
4512 | LocalInstantiationScope InstScope(*this); | ||||||
4513 | // Finish template argument deduction. | ||||||
4514 | FunctionDecl *ConversionSpecialized = nullptr; | ||||||
4515 | TemplateDeductionResult Result; | ||||||
4516 | runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
4517 | Result = FinishTemplateArgumentDeduction(ConversionTemplate, Deduced, 0, | ||||||
4518 | ConversionSpecialized, Info); | ||||||
4519 | }); | ||||||
4520 | Specialization = cast_or_null<CXXConversionDecl>(ConversionSpecialized); | ||||||
4521 | return Result; | ||||||
4522 | } | ||||||
4523 | |||||||
4524 | /// Deduce template arguments for a function template when there is | ||||||
4525 | /// nothing to deduce against (C++0x [temp.arg.explicit]p3). | ||||||
4526 | /// | ||||||
4527 | /// \param FunctionTemplate the function template for which we are performing | ||||||
4528 | /// template argument deduction. | ||||||
4529 | /// | ||||||
4530 | /// \param ExplicitTemplateArgs the explicitly-specified template | ||||||
4531 | /// arguments. | ||||||
4532 | /// | ||||||
4533 | /// \param Specialization if template argument deduction was successful, | ||||||
4534 | /// this will be set to the function template specialization produced by | ||||||
4535 | /// template argument deduction. | ||||||
4536 | /// | ||||||
4537 | /// \param Info the argument will be updated to provide additional information | ||||||
4538 | /// about template argument deduction. | ||||||
4539 | /// | ||||||
4540 | /// \param IsAddressOfFunction If \c true, we are deducing as part of taking | ||||||
4541 | /// the address of a function template in a context where we do not have a | ||||||
4542 | /// target type, per [over.over]. If \c false, we are looking up a function | ||||||
4543 | /// template specialization based on its signature, which only happens when | ||||||
4544 | /// deducing a function parameter type from an argument that is a template-id | ||||||
4545 | /// naming a function template specialization. | ||||||
4546 | /// | ||||||
4547 | /// \returns the result of template argument deduction. | ||||||
4548 | Sema::TemplateDeductionResult Sema::DeduceTemplateArguments( | ||||||
4549 | FunctionTemplateDecl *FunctionTemplate, | ||||||
4550 | TemplateArgumentListInfo *ExplicitTemplateArgs, | ||||||
4551 | FunctionDecl *&Specialization, TemplateDeductionInfo &Info, | ||||||
4552 | bool IsAddressOfFunction) { | ||||||
4553 | return DeduceTemplateArguments(FunctionTemplate, ExplicitTemplateArgs, | ||||||
4554 | QualType(), Specialization, Info, | ||||||
4555 | IsAddressOfFunction); | ||||||
4556 | } | ||||||
4557 | |||||||
4558 | namespace { | ||||||
4559 | struct DependentAuto { bool IsPack; }; | ||||||
4560 | |||||||
4561 | /// Substitute the 'auto' specifier or deduced template specialization type | ||||||
4562 | /// specifier within a type for a given replacement type. | ||||||
4563 | class SubstituteDeducedTypeTransform : | ||||||
4564 | public TreeTransform<SubstituteDeducedTypeTransform> { | ||||||
4565 | QualType Replacement; | ||||||
4566 | bool ReplacementIsPack; | ||||||
4567 | bool UseTypeSugar; | ||||||
4568 | |||||||
4569 | public: | ||||||
4570 | SubstituteDeducedTypeTransform(Sema &SemaRef, DependentAuto DA) | ||||||
4571 | : TreeTransform<SubstituteDeducedTypeTransform>(SemaRef), Replacement(), | ||||||
4572 | ReplacementIsPack(DA.IsPack), UseTypeSugar(true) {} | ||||||
4573 | |||||||
4574 | SubstituteDeducedTypeTransform(Sema &SemaRef, QualType Replacement, | ||||||
4575 | bool UseTypeSugar = true) | ||||||
4576 | : TreeTransform<SubstituteDeducedTypeTransform>(SemaRef), | ||||||
4577 | Replacement(Replacement), ReplacementIsPack(false), | ||||||
4578 | UseTypeSugar(UseTypeSugar) {} | ||||||
4579 | |||||||
4580 | QualType TransformDesugared(TypeLocBuilder &TLB, DeducedTypeLoc TL) { | ||||||
4581 | assert(isa<TemplateTypeParmType>(Replacement) &&((isa<TemplateTypeParmType>(Replacement) && "unexpected unsugared replacement kind" ) ? static_cast<void> (0) : __assert_fail ("isa<TemplateTypeParmType>(Replacement) && \"unexpected unsugared replacement kind\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4582, __PRETTY_FUNCTION__)) | ||||||
4582 | "unexpected unsugared replacement kind")((isa<TemplateTypeParmType>(Replacement) && "unexpected unsugared replacement kind" ) ? static_cast<void> (0) : __assert_fail ("isa<TemplateTypeParmType>(Replacement) && \"unexpected unsugared replacement kind\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4582, __PRETTY_FUNCTION__)); | ||||||
4583 | QualType Result = Replacement; | ||||||
4584 | TemplateTypeParmTypeLoc NewTL = TLB.push<TemplateTypeParmTypeLoc>(Result); | ||||||
4585 | NewTL.setNameLoc(TL.getNameLoc()); | ||||||
4586 | return Result; | ||||||
4587 | } | ||||||
4588 | |||||||
4589 | QualType TransformAutoType(TypeLocBuilder &TLB, AutoTypeLoc TL) { | ||||||
4590 | // If we're building the type pattern to deduce against, don't wrap the | ||||||
4591 | // substituted type in an AutoType. Certain template deduction rules | ||||||
4592 | // apply only when a template type parameter appears directly (and not if | ||||||
4593 | // the parameter is found through desugaring). For instance: | ||||||
4594 | // auto &&lref = lvalue; | ||||||
4595 | // must transform into "rvalue reference to T" not "rvalue reference to | ||||||
4596 | // auto type deduced as T" in order for [temp.deduct.call]p3 to apply. | ||||||
4597 | // | ||||||
4598 | // FIXME: Is this still necessary? | ||||||
4599 | if (!UseTypeSugar) | ||||||
4600 | return TransformDesugared(TLB, TL); | ||||||
4601 | |||||||
4602 | QualType Result = SemaRef.Context.getAutoType( | ||||||
4603 | Replacement, TL.getTypePtr()->getKeyword(), Replacement.isNull(), | ||||||
4604 | ReplacementIsPack, TL.getTypePtr()->getTypeConstraintConcept(), | ||||||
4605 | TL.getTypePtr()->getTypeConstraintArguments()); | ||||||
4606 | auto NewTL = TLB.push<AutoTypeLoc>(Result); | ||||||
4607 | NewTL.copy(TL); | ||||||
4608 | return Result; | ||||||
4609 | } | ||||||
4610 | |||||||
4611 | QualType TransformDeducedTemplateSpecializationType( | ||||||
4612 | TypeLocBuilder &TLB, DeducedTemplateSpecializationTypeLoc TL) { | ||||||
4613 | if (!UseTypeSugar) | ||||||
4614 | return TransformDesugared(TLB, TL); | ||||||
4615 | |||||||
4616 | QualType Result = SemaRef.Context.getDeducedTemplateSpecializationType( | ||||||
4617 | TL.getTypePtr()->getTemplateName(), | ||||||
4618 | Replacement, Replacement.isNull()); | ||||||
4619 | auto NewTL = TLB.push<DeducedTemplateSpecializationTypeLoc>(Result); | ||||||
4620 | NewTL.setNameLoc(TL.getNameLoc()); | ||||||
4621 | return Result; | ||||||
4622 | } | ||||||
4623 | |||||||
4624 | ExprResult TransformLambdaExpr(LambdaExpr *E) { | ||||||
4625 | // Lambdas never need to be transformed. | ||||||
4626 | return E; | ||||||
4627 | } | ||||||
4628 | |||||||
4629 | QualType Apply(TypeLoc TL) { | ||||||
4630 | // Create some scratch storage for the transformed type locations. | ||||||
4631 | // FIXME: We're just going to throw this information away. Don't build it. | ||||||
4632 | TypeLocBuilder TLB; | ||||||
4633 | TLB.reserve(TL.getFullDataSize()); | ||||||
4634 | return TransformType(TLB, TL); | ||||||
4635 | } | ||||||
4636 | }; | ||||||
4637 | |||||||
4638 | } // namespace | ||||||
4639 | |||||||
4640 | Sema::DeduceAutoResult | ||||||
4641 | Sema::DeduceAutoType(TypeSourceInfo *Type, Expr *&Init, QualType &Result, | ||||||
4642 | Optional<unsigned> DependentDeductionDepth, | ||||||
4643 | bool IgnoreConstraints) { | ||||||
4644 | return DeduceAutoType(Type->getTypeLoc(), Init, Result, | ||||||
| |||||||
4645 | DependentDeductionDepth, IgnoreConstraints); | ||||||
4646 | } | ||||||
4647 | |||||||
4648 | /// Attempt to produce an informative diagostic explaining why auto deduction | ||||||
4649 | /// failed. | ||||||
4650 | /// \return \c true if diagnosed, \c false if not. | ||||||
4651 | static bool diagnoseAutoDeductionFailure(Sema &S, | ||||||
4652 | Sema::TemplateDeductionResult TDK, | ||||||
4653 | TemplateDeductionInfo &Info, | ||||||
4654 | ArrayRef<SourceRange> Ranges) { | ||||||
4655 | switch (TDK) { | ||||||
4656 | case Sema::TDK_Inconsistent: { | ||||||
4657 | // Inconsistent deduction means we were deducing from an initializer list. | ||||||
4658 | auto D = S.Diag(Info.getLocation(), diag::err_auto_inconsistent_deduction); | ||||||
4659 | D << Info.FirstArg << Info.SecondArg; | ||||||
4660 | for (auto R : Ranges) | ||||||
4661 | D << R; | ||||||
4662 | return true; | ||||||
4663 | } | ||||||
4664 | |||||||
4665 | // FIXME: Are there other cases for which a custom diagnostic is more useful | ||||||
4666 | // than the basic "types don't match" diagnostic? | ||||||
4667 | |||||||
4668 | default: | ||||||
4669 | return false; | ||||||
4670 | } | ||||||
4671 | } | ||||||
4672 | |||||||
4673 | static Sema::DeduceAutoResult | ||||||
4674 | CheckDeducedPlaceholderConstraints(Sema &S, const AutoType &Type, | ||||||
4675 | AutoTypeLoc TypeLoc, QualType Deduced) { | ||||||
4676 | ConstraintSatisfaction Satisfaction; | ||||||
4677 | ConceptDecl *Concept = Type.getTypeConstraintConcept(); | ||||||
4678 | TemplateArgumentListInfo TemplateArgs(TypeLoc.getLAngleLoc(), | ||||||
4679 | TypeLoc.getRAngleLoc()); | ||||||
4680 | TemplateArgs.addArgument( | ||||||
4681 | TemplateArgumentLoc(TemplateArgument(Deduced), | ||||||
4682 | S.Context.getTrivialTypeSourceInfo( | ||||||
4683 | Deduced, TypeLoc.getNameLoc()))); | ||||||
4684 | for (unsigned I = 0, C = TypeLoc.getNumArgs(); I != C; ++I) | ||||||
4685 | TemplateArgs.addArgument(TypeLoc.getArgLoc(I)); | ||||||
4686 | |||||||
4687 | llvm::SmallVector<TemplateArgument, 4> Converted; | ||||||
4688 | if (S.CheckTemplateArgumentList(Concept, SourceLocation(), TemplateArgs, | ||||||
4689 | /*PartialTemplateArgs=*/false, Converted)) | ||||||
4690 | return Sema::DAR_FailedAlreadyDiagnosed; | ||||||
4691 | if (S.CheckConstraintSatisfaction(Concept, {Concept->getConstraintExpr()}, | ||||||
4692 | Converted, TypeLoc.getLocalSourceRange(), | ||||||
4693 | Satisfaction)) | ||||||
4694 | return Sema::DAR_FailedAlreadyDiagnosed; | ||||||
4695 | if (!Satisfaction.IsSatisfied) { | ||||||
4696 | std::string Buf; | ||||||
4697 | llvm::raw_string_ostream OS(Buf); | ||||||
4698 | OS << "'" << Concept->getName(); | ||||||
4699 | if (TypeLoc.hasExplicitTemplateArgs()) { | ||||||
4700 | OS << "<"; | ||||||
4701 | for (const auto &Arg : Type.getTypeConstraintArguments()) | ||||||
4702 | Arg.print(S.getPrintingPolicy(), OS); | ||||||
4703 | OS << ">"; | ||||||
4704 | } | ||||||
4705 | OS << "'"; | ||||||
4706 | OS.flush(); | ||||||
4707 | S.Diag(TypeLoc.getConceptNameLoc(), | ||||||
4708 | diag::err_placeholder_constraints_not_satisfied) | ||||||
4709 | << Deduced << Buf << TypeLoc.getLocalSourceRange(); | ||||||
4710 | S.DiagnoseUnsatisfiedConstraint(Satisfaction); | ||||||
4711 | return Sema::DAR_FailedAlreadyDiagnosed; | ||||||
4712 | } | ||||||
4713 | return Sema::DAR_Succeeded; | ||||||
4714 | } | ||||||
4715 | |||||||
4716 | /// Deduce the type for an auto type-specifier (C++11 [dcl.spec.auto]p6) | ||||||
4717 | /// | ||||||
4718 | /// Note that this is done even if the initializer is dependent. (This is | ||||||
4719 | /// necessary to support partial ordering of templates using 'auto'.) | ||||||
4720 | /// A dependent type will be produced when deducing from a dependent type. | ||||||
4721 | /// | ||||||
4722 | /// \param Type the type pattern using the auto type-specifier. | ||||||
4723 | /// \param Init the initializer for the variable whose type is to be deduced. | ||||||
4724 | /// \param Result if type deduction was successful, this will be set to the | ||||||
4725 | /// deduced type. | ||||||
4726 | /// \param DependentDeductionDepth Set if we should permit deduction in | ||||||
4727 | /// dependent cases. This is necessary for template partial ordering with | ||||||
4728 | /// 'auto' template parameters. The value specified is the template | ||||||
4729 | /// parameter depth at which we should perform 'auto' deduction. | ||||||
4730 | /// \param IgnoreConstraints Set if we should not fail if the deduced type does | ||||||
4731 | /// not satisfy the type-constraint in the auto type. | ||||||
4732 | Sema::DeduceAutoResult | ||||||
4733 | Sema::DeduceAutoType(TypeLoc Type, Expr *&Init, QualType &Result, | ||||||
4734 | Optional<unsigned> DependentDeductionDepth, | ||||||
4735 | bool IgnoreConstraints) { | ||||||
4736 | if (Init->containsErrors()) | ||||||
4737 | return DAR_FailedAlreadyDiagnosed; | ||||||
4738 | if (Init->getType()->isNonOverloadPlaceholderType()) { | ||||||
4739 | ExprResult NonPlaceholder = CheckPlaceholderExpr(Init); | ||||||
4740 | if (NonPlaceholder.isInvalid()) | ||||||
4741 | return DAR_FailedAlreadyDiagnosed; | ||||||
4742 | Init = NonPlaceholder.get(); | ||||||
4743 | } | ||||||
4744 | |||||||
4745 | DependentAuto DependentResult = { | ||||||
4746 | /*.IsPack = */ (bool)Type.getAs<PackExpansionTypeLoc>()}; | ||||||
4747 | |||||||
4748 | if (!DependentDeductionDepth && | ||||||
4749 | (Type.getType()->isDependentType() || Init->isTypeDependent() || | ||||||
4750 | Init->containsUnexpandedParameterPack())) { | ||||||
4751 | Result = SubstituteDeducedTypeTransform(*this, DependentResult).Apply(Type); | ||||||
4752 | assert(!Result.isNull() && "substituting DependentTy can't fail")((!Result.isNull() && "substituting DependentTy can't fail" ) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"substituting DependentTy can't fail\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4752, __PRETTY_FUNCTION__)); | ||||||
4753 | return DAR_Succeeded; | ||||||
4754 | } | ||||||
4755 | |||||||
4756 | // Find the depth of template parameter to synthesize. | ||||||
4757 | unsigned Depth = DependentDeductionDepth.getValueOr(0); | ||||||
4758 | |||||||
4759 | // If this is a 'decltype(auto)' specifier, do the decltype dance. | ||||||
4760 | // Since 'decltype(auto)' can only occur at the top of the type, we | ||||||
4761 | // don't need to go digging for it. | ||||||
4762 | if (const AutoType *AT
| ||||||
4763 | if (AT->isDecltypeAuto()) { | ||||||
4764 | if (isa<InitListExpr>(Init)) { | ||||||
4765 | Diag(Init->getBeginLoc(), diag::err_decltype_auto_initializer_list); | ||||||
4766 | return DAR_FailedAlreadyDiagnosed; | ||||||
4767 | } | ||||||
4768 | |||||||
4769 | ExprResult ER = CheckPlaceholderExpr(Init); | ||||||
4770 | if (ER.isInvalid()) | ||||||
4771 | return DAR_FailedAlreadyDiagnosed; | ||||||
4772 | Init = ER.get(); | ||||||
4773 | QualType Deduced = BuildDecltypeType(Init, Init->getBeginLoc(), false); | ||||||
4774 | if (Deduced.isNull()) | ||||||
4775 | return DAR_FailedAlreadyDiagnosed; | ||||||
4776 | // FIXME: Support a non-canonical deduced type for 'auto'. | ||||||
4777 | Deduced = Context.getCanonicalType(Deduced); | ||||||
4778 | if (AT->isConstrained() && !IgnoreConstraints) { | ||||||
4779 | auto ConstraintsResult = | ||||||
4780 | CheckDeducedPlaceholderConstraints(*this, *AT, | ||||||
4781 | Type.getContainedAutoTypeLoc(), | ||||||
4782 | Deduced); | ||||||
4783 | if (ConstraintsResult != DAR_Succeeded) | ||||||
4784 | return ConstraintsResult; | ||||||
4785 | } | ||||||
4786 | Result = SubstituteDeducedTypeTransform(*this, Deduced).Apply(Type); | ||||||
4787 | if (Result.isNull()) | ||||||
4788 | return DAR_FailedAlreadyDiagnosed; | ||||||
4789 | return DAR_Succeeded; | ||||||
4790 | } else if (!getLangOpts().CPlusPlus) { | ||||||
4791 | if (isa<InitListExpr>(Init)) { | ||||||
4792 | Diag(Init->getBeginLoc(), diag::err_auto_init_list_from_c); | ||||||
4793 | return DAR_FailedAlreadyDiagnosed; | ||||||
4794 | } | ||||||
4795 | } | ||||||
4796 | } | ||||||
4797 | |||||||
4798 | SourceLocation Loc = Init->getExprLoc(); | ||||||
4799 | |||||||
4800 | LocalInstantiationScope InstScope(*this); | ||||||
4801 | |||||||
4802 | // Build template<class TemplParam> void Func(FuncParam); | ||||||
4803 | TemplateTypeParmDecl *TemplParam = TemplateTypeParmDecl::Create( | ||||||
4804 | Context, nullptr, SourceLocation(), Loc, Depth, 0, nullptr, false, false, | ||||||
4805 | false); | ||||||
4806 | QualType TemplArg = QualType(TemplParam->getTypeForDecl(), 0); | ||||||
4807 | NamedDecl *TemplParamPtr = TemplParam; | ||||||
4808 | FixedSizeTemplateParameterListStorage<1, false> TemplateParamsSt( | ||||||
4809 | Context, Loc, Loc, TemplParamPtr, Loc, nullptr); | ||||||
4810 | |||||||
4811 | QualType FuncParam = | ||||||
4812 | SubstituteDeducedTypeTransform(*this, TemplArg, /*UseTypeSugar*/false) | ||||||
4813 | .Apply(Type); | ||||||
4814 | assert(!FuncParam.isNull() &&((!FuncParam.isNull() && "substituting template parameter for 'auto' failed" ) ? static_cast<void> (0) : __assert_fail ("!FuncParam.isNull() && \"substituting template parameter for 'auto' failed\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4815, __PRETTY_FUNCTION__)) | ||||||
4815 | "substituting template parameter for 'auto' failed")((!FuncParam.isNull() && "substituting template parameter for 'auto' failed" ) ? static_cast<void> (0) : __assert_fail ("!FuncParam.isNull() && \"substituting template parameter for 'auto' failed\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4815, __PRETTY_FUNCTION__)); | ||||||
4816 | |||||||
4817 | // Deduce type of TemplParam in Func(Init) | ||||||
4818 | SmallVector<DeducedTemplateArgument, 1> Deduced; | ||||||
4819 | Deduced.resize(1); | ||||||
4820 | |||||||
4821 | TemplateDeductionInfo Info(Loc, Depth); | ||||||
4822 | |||||||
4823 | // If deduction failed, don't diagnose if the initializer is dependent; it | ||||||
4824 | // might acquire a matching type in the instantiation. | ||||||
4825 | auto DeductionFailed = [&](TemplateDeductionResult TDK, | ||||||
4826 | ArrayRef<SourceRange> Ranges) -> DeduceAutoResult { | ||||||
4827 | if (Init->isTypeDependent()) { | ||||||
4828 | Result = | ||||||
4829 | SubstituteDeducedTypeTransform(*this, DependentResult).Apply(Type); | ||||||
4830 | assert(!Result.isNull() && "substituting DependentTy can't fail")((!Result.isNull() && "substituting DependentTy can't fail" ) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"substituting DependentTy can't fail\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4830, __PRETTY_FUNCTION__)); | ||||||
4831 | return DAR_Succeeded; | ||||||
4832 | } | ||||||
4833 | if (diagnoseAutoDeductionFailure(*this, TDK, Info, Ranges)) | ||||||
4834 | return DAR_FailedAlreadyDiagnosed; | ||||||
4835 | return DAR_Failed; | ||||||
4836 | }; | ||||||
4837 | |||||||
4838 | SmallVector<OriginalCallArg, 4> OriginalCallArgs; | ||||||
4839 | |||||||
4840 | InitListExpr *InitList = dyn_cast<InitListExpr>(Init); | ||||||
4841 | if (InitList
| ||||||
4842 | // Notionally, we substitute std::initializer_list<T> for 'auto' and deduce | ||||||
4843 | // against that. Such deduction only succeeds if removing cv-qualifiers and | ||||||
4844 | // references results in std::initializer_list<T>. | ||||||
4845 | if (!Type.getType().getNonReferenceType()->getAs<AutoType>()) | ||||||
4846 | return DAR_Failed; | ||||||
4847 | |||||||
4848 | // Resolving a core issue: a braced-init-list containing any designators is | ||||||
4849 | // a non-deduced context. | ||||||
4850 | for (Expr *E : InitList->inits()) | ||||||
4851 | if (isa<DesignatedInitExpr>(E)) | ||||||
4852 | return DAR_Failed; | ||||||
4853 | |||||||
4854 | SourceRange DeducedFromInitRange; | ||||||
4855 | for (unsigned i = 0, e = InitList->getNumInits(); i < e; ++i) { | ||||||
4856 | Expr *Init = InitList->getInit(i); | ||||||
4857 | |||||||
4858 | if (auto TDK = DeduceTemplateArgumentsFromCallArgument( | ||||||
4859 | *this, TemplateParamsSt.get(), 0, TemplArg, Init, | ||||||
4860 | Info, Deduced, OriginalCallArgs, /*Decomposed*/ true, | ||||||
4861 | /*ArgIdx*/ 0, /*TDF*/ 0)) | ||||||
4862 | return DeductionFailed(TDK, {DeducedFromInitRange, | ||||||
4863 | Init->getSourceRange()}); | ||||||
4864 | |||||||
4865 | if (DeducedFromInitRange.isInvalid() && | ||||||
4866 | Deduced[0].getKind() != TemplateArgument::Null) | ||||||
4867 | DeducedFromInitRange = Init->getSourceRange(); | ||||||
4868 | } | ||||||
4869 | } else { | ||||||
4870 | if (!getLangOpts().CPlusPlus && Init->refersToBitField()) { | ||||||
4871 | Diag(Loc, diag::err_auto_bitfield); | ||||||
4872 | return DAR_FailedAlreadyDiagnosed; | ||||||
4873 | } | ||||||
4874 | |||||||
4875 | if (auto TDK = DeduceTemplateArgumentsFromCallArgument( | ||||||
4876 | *this, TemplateParamsSt.get(), 0, FuncParam, Init, Info, Deduced, | ||||||
4877 | OriginalCallArgs, /*Decomposed*/ false, /*ArgIdx*/ 0, /*TDF*/ 0)) | ||||||
4878 | return DeductionFailed(TDK, {}); | ||||||
4879 | } | ||||||
4880 | |||||||
4881 | // Could be null if somehow 'auto' appears in a non-deduced context. | ||||||
4882 | if (Deduced[0].getKind() != TemplateArgument::Type) | ||||||
4883 | return DeductionFailed(TDK_Incomplete, {}); | ||||||
4884 | |||||||
4885 | QualType DeducedType = Deduced[0].getAsType(); | ||||||
4886 | |||||||
4887 | if (InitList) { | ||||||
4888 | DeducedType = BuildStdInitializerList(DeducedType, Loc); | ||||||
4889 | if (DeducedType.isNull()) | ||||||
4890 | return DAR_FailedAlreadyDiagnosed; | ||||||
4891 | } | ||||||
4892 | |||||||
4893 | if (const auto *AT = Type.getType()->getAs<AutoType>()) { | ||||||
4894 | if (AT->isConstrained() && !IgnoreConstraints) { | ||||||
4895 | auto ConstraintsResult = | ||||||
4896 | CheckDeducedPlaceholderConstraints(*this, *AT, | ||||||
4897 | Type.getContainedAutoTypeLoc(), | ||||||
4898 | DeducedType); | ||||||
4899 | if (ConstraintsResult != DAR_Succeeded) | ||||||
4900 | return ConstraintsResult; | ||||||
4901 | } | ||||||
4902 | } | ||||||
4903 | |||||||
4904 | Result = SubstituteDeducedTypeTransform(*this, DeducedType).Apply(Type); | ||||||
4905 | if (Result.isNull()) | ||||||
4906 | return DAR_FailedAlreadyDiagnosed; | ||||||
4907 | |||||||
4908 | // Check that the deduced argument type is compatible with the original | ||||||
4909 | // argument type per C++ [temp.deduct.call]p4. | ||||||
4910 | QualType DeducedA = InitList ? Deduced[0].getAsType() : Result; | ||||||
4911 | for (const OriginalCallArg &OriginalArg : OriginalCallArgs) { | ||||||
4912 | assert((bool)InitList == OriginalArg.DecomposedParam &&(((bool)InitList == OriginalArg.DecomposedParam && "decomposed non-init-list in auto deduction?" ) ? static_cast<void> (0) : __assert_fail ("(bool)InitList == OriginalArg.DecomposedParam && \"decomposed non-init-list in auto deduction?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4913, __PRETTY_FUNCTION__)) | ||||||
4913 | "decomposed non-init-list in auto deduction?")(((bool)InitList == OriginalArg.DecomposedParam && "decomposed non-init-list in auto deduction?" ) ? static_cast<void> (0) : __assert_fail ("(bool)InitList == OriginalArg.DecomposedParam && \"decomposed non-init-list in auto deduction?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4913, __PRETTY_FUNCTION__)); | ||||||
4914 | if (auto TDK = | ||||||
4915 | CheckOriginalCallArgDeduction(*this, Info, OriginalArg, DeducedA)) { | ||||||
4916 | Result = QualType(); | ||||||
4917 | return DeductionFailed(TDK, {}); | ||||||
4918 | } | ||||||
4919 | } | ||||||
4920 | |||||||
4921 | return DAR_Succeeded; | ||||||
4922 | } | ||||||
4923 | |||||||
4924 | QualType Sema::SubstAutoType(QualType TypeWithAuto, | ||||||
4925 | QualType TypeToReplaceAuto) { | ||||||
4926 | if (TypeToReplaceAuto->isDependentType()) | ||||||
4927 | return SubstituteDeducedTypeTransform( | ||||||
4928 | *this, DependentAuto{ | ||||||
4929 | TypeToReplaceAuto->containsUnexpandedParameterPack()}) | ||||||
4930 | .TransformType(TypeWithAuto); | ||||||
4931 | return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto) | ||||||
4932 | .TransformType(TypeWithAuto); | ||||||
4933 | } | ||||||
4934 | |||||||
4935 | TypeSourceInfo *Sema::SubstAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto, | ||||||
4936 | QualType TypeToReplaceAuto) { | ||||||
4937 | if (TypeToReplaceAuto->isDependentType()) | ||||||
4938 | return SubstituteDeducedTypeTransform( | ||||||
4939 | *this, | ||||||
4940 | DependentAuto{ | ||||||
4941 | TypeToReplaceAuto->containsUnexpandedParameterPack()}) | ||||||
4942 | .TransformType(TypeWithAuto); | ||||||
4943 | return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto) | ||||||
4944 | .TransformType(TypeWithAuto); | ||||||
4945 | } | ||||||
4946 | |||||||
4947 | QualType Sema::ReplaceAutoType(QualType TypeWithAuto, | ||||||
4948 | QualType TypeToReplaceAuto) { | ||||||
4949 | return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto, | ||||||
4950 | /*UseTypeSugar*/ false) | ||||||
4951 | .TransformType(TypeWithAuto); | ||||||
4952 | } | ||||||
4953 | |||||||
4954 | TypeSourceInfo *Sema::ReplaceAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto, | ||||||
4955 | QualType TypeToReplaceAuto) { | ||||||
4956 | return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto, | ||||||
4957 | /*UseTypeSugar*/ false) | ||||||
4958 | .TransformType(TypeWithAuto); | ||||||
4959 | } | ||||||
4960 | |||||||
4961 | void Sema::DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init) { | ||||||
4962 | if (isa<InitListExpr>(Init)) | ||||||
4963 | Diag(VDecl->getLocation(), | ||||||
4964 | VDecl->isInitCapture() | ||||||
4965 | ? diag::err_init_capture_deduction_failure_from_init_list | ||||||
4966 | : diag::err_auto_var_deduction_failure_from_init_list) | ||||||
4967 | << VDecl->getDeclName() << VDecl->getType() << Init->getSourceRange(); | ||||||
4968 | else | ||||||
4969 | Diag(VDecl->getLocation(), | ||||||
4970 | VDecl->isInitCapture() ? diag::err_init_capture_deduction_failure | ||||||
4971 | : diag::err_auto_var_deduction_failure) | ||||||
4972 | << VDecl->getDeclName() << VDecl->getType() << Init->getType() | ||||||
4973 | << Init->getSourceRange(); | ||||||
4974 | } | ||||||
4975 | |||||||
4976 | bool Sema::DeduceReturnType(FunctionDecl *FD, SourceLocation Loc, | ||||||
4977 | bool Diagnose) { | ||||||
4978 | assert(FD->getReturnType()->isUndeducedType())((FD->getReturnType()->isUndeducedType()) ? static_cast <void> (0) : __assert_fail ("FD->getReturnType()->isUndeducedType()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 4978, __PRETTY_FUNCTION__)); | ||||||
4979 | |||||||
4980 | // For a lambda's conversion operator, deduce any 'auto' or 'decltype(auto)' | ||||||
4981 | // within the return type from the call operator's type. | ||||||
4982 | if (isLambdaConversionOperator(FD)) { | ||||||
4983 | CXXRecordDecl *Lambda = cast<CXXMethodDecl>(FD)->getParent(); | ||||||
4984 | FunctionDecl *CallOp = Lambda->getLambdaCallOperator(); | ||||||
4985 | |||||||
4986 | // For a generic lambda, instantiate the call operator if needed. | ||||||
4987 | if (auto *Args = FD->getTemplateSpecializationArgs()) { | ||||||
4988 | CallOp = InstantiateFunctionDeclaration( | ||||||
4989 | CallOp->getDescribedFunctionTemplate(), Args, Loc); | ||||||
4990 | if (!CallOp || CallOp->isInvalidDecl()) | ||||||
4991 | return true; | ||||||
4992 | |||||||
4993 | // We might need to deduce the return type by instantiating the definition | ||||||
4994 | // of the operator() function. | ||||||
4995 | if (CallOp->getReturnType()->isUndeducedType()) { | ||||||
4996 | runWithSufficientStackSpace(Loc, [&] { | ||||||
4997 | InstantiateFunctionDefinition(Loc, CallOp); | ||||||
4998 | }); | ||||||
4999 | } | ||||||
5000 | } | ||||||
5001 | |||||||
5002 | if (CallOp->isInvalidDecl()) | ||||||
5003 | return true; | ||||||
5004 | assert(!CallOp->getReturnType()->isUndeducedType() &&((!CallOp->getReturnType()->isUndeducedType() && "failed to deduce lambda return type") ? static_cast<void > (0) : __assert_fail ("!CallOp->getReturnType()->isUndeducedType() && \"failed to deduce lambda return type\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5005, __PRETTY_FUNCTION__)) | ||||||
5005 | "failed to deduce lambda return type")((!CallOp->getReturnType()->isUndeducedType() && "failed to deduce lambda return type") ? static_cast<void > (0) : __assert_fail ("!CallOp->getReturnType()->isUndeducedType() && \"failed to deduce lambda return type\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5005, __PRETTY_FUNCTION__)); | ||||||
5006 | |||||||
5007 | // Build the new return type from scratch. | ||||||
5008 | CallingConv RetTyCC = FD->getReturnType() | ||||||
5009 | ->getPointeeType() | ||||||
5010 | ->castAs<FunctionType>() | ||||||
5011 | ->getCallConv(); | ||||||
5012 | QualType RetType = getLambdaConversionFunctionResultType( | ||||||
5013 | CallOp->getType()->castAs<FunctionProtoType>(), RetTyCC); | ||||||
5014 | if (FD->getReturnType()->getAs<PointerType>()) | ||||||
5015 | RetType = Context.getPointerType(RetType); | ||||||
5016 | else { | ||||||
5017 | assert(FD->getReturnType()->getAs<BlockPointerType>())((FD->getReturnType()->getAs<BlockPointerType>()) ? static_cast<void> (0) : __assert_fail ("FD->getReturnType()->getAs<BlockPointerType>()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5017, __PRETTY_FUNCTION__)); | ||||||
5018 | RetType = Context.getBlockPointerType(RetType); | ||||||
5019 | } | ||||||
5020 | Context.adjustDeducedFunctionResultType(FD, RetType); | ||||||
5021 | return false; | ||||||
5022 | } | ||||||
5023 | |||||||
5024 | if (FD->getTemplateInstantiationPattern()) { | ||||||
5025 | runWithSufficientStackSpace(Loc, [&] { | ||||||
5026 | InstantiateFunctionDefinition(Loc, FD); | ||||||
5027 | }); | ||||||
5028 | } | ||||||
5029 | |||||||
5030 | bool StillUndeduced = FD->getReturnType()->isUndeducedType(); | ||||||
5031 | if (StillUndeduced && Diagnose && !FD->isInvalidDecl()) { | ||||||
5032 | Diag(Loc, diag::err_auto_fn_used_before_defined) << FD; | ||||||
5033 | Diag(FD->getLocation(), diag::note_callee_decl) << FD; | ||||||
5034 | } | ||||||
5035 | |||||||
5036 | return StillUndeduced; | ||||||
5037 | } | ||||||
5038 | |||||||
5039 | /// If this is a non-static member function, | ||||||
5040 | static void | ||||||
5041 | AddImplicitObjectParameterType(ASTContext &Context, | ||||||
5042 | CXXMethodDecl *Method, | ||||||
5043 | SmallVectorImpl<QualType> &ArgTypes) { | ||||||
5044 | // C++11 [temp.func.order]p3: | ||||||
5045 | // [...] The new parameter is of type "reference to cv A," where cv are | ||||||
5046 | // the cv-qualifiers of the function template (if any) and A is | ||||||
5047 | // the class of which the function template is a member. | ||||||
5048 | // | ||||||
5049 | // The standard doesn't say explicitly, but we pick the appropriate kind of | ||||||
5050 | // reference type based on [over.match.funcs]p4. | ||||||
5051 | QualType ArgTy = Context.getTypeDeclType(Method->getParent()); | ||||||
5052 | ArgTy = Context.getQualifiedType(ArgTy, Method->getMethodQualifiers()); | ||||||
5053 | if (Method->getRefQualifier() == RQ_RValue) | ||||||
5054 | ArgTy = Context.getRValueReferenceType(ArgTy); | ||||||
5055 | else | ||||||
5056 | ArgTy = Context.getLValueReferenceType(ArgTy); | ||||||
5057 | ArgTypes.push_back(ArgTy); | ||||||
5058 | } | ||||||
5059 | |||||||
5060 | /// Determine whether the function template \p FT1 is at least as | ||||||
5061 | /// specialized as \p FT2. | ||||||
5062 | static bool isAtLeastAsSpecializedAs(Sema &S, | ||||||
5063 | SourceLocation Loc, | ||||||
5064 | FunctionTemplateDecl *FT1, | ||||||
5065 | FunctionTemplateDecl *FT2, | ||||||
5066 | TemplatePartialOrderingContext TPOC, | ||||||
5067 | unsigned NumCallArguments1, | ||||||
5068 | bool Reversed) { | ||||||
5069 | assert(!Reversed || TPOC == TPOC_Call)((!Reversed || TPOC == TPOC_Call) ? static_cast<void> ( 0) : __assert_fail ("!Reversed || TPOC == TPOC_Call", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5069, __PRETTY_FUNCTION__)); | ||||||
5070 | |||||||
5071 | FunctionDecl *FD1 = FT1->getTemplatedDecl(); | ||||||
5072 | FunctionDecl *FD2 = FT2->getTemplatedDecl(); | ||||||
5073 | const FunctionProtoType *Proto1 = FD1->getType()->getAs<FunctionProtoType>(); | ||||||
5074 | const FunctionProtoType *Proto2 = FD2->getType()->getAs<FunctionProtoType>(); | ||||||
5075 | |||||||
5076 | assert(Proto1 && Proto2 && "Function templates must have prototypes")((Proto1 && Proto2 && "Function templates must have prototypes" ) ? static_cast<void> (0) : __assert_fail ("Proto1 && Proto2 && \"Function templates must have prototypes\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5076, __PRETTY_FUNCTION__)); | ||||||
5077 | TemplateParameterList *TemplateParams = FT2->getTemplateParameters(); | ||||||
5078 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
5079 | Deduced.resize(TemplateParams->size()); | ||||||
5080 | |||||||
5081 | // C++0x [temp.deduct.partial]p3: | ||||||
5082 | // The types used to determine the ordering depend on the context in which | ||||||
5083 | // the partial ordering is done: | ||||||
5084 | TemplateDeductionInfo Info(Loc); | ||||||
5085 | SmallVector<QualType, 4> Args2; | ||||||
5086 | switch (TPOC) { | ||||||
5087 | case TPOC_Call: { | ||||||
5088 | // - In the context of a function call, the function parameter types are | ||||||
5089 | // used. | ||||||
5090 | CXXMethodDecl *Method1 = dyn_cast<CXXMethodDecl>(FD1); | ||||||
5091 | CXXMethodDecl *Method2 = dyn_cast<CXXMethodDecl>(FD2); | ||||||
5092 | |||||||
5093 | // C++11 [temp.func.order]p3: | ||||||
5094 | // [...] If only one of the function templates is a non-static | ||||||
5095 | // member, that function template is considered to have a new | ||||||
5096 | // first parameter inserted in its function parameter list. The | ||||||
5097 | // new parameter is of type "reference to cv A," where cv are | ||||||
5098 | // the cv-qualifiers of the function template (if any) and A is | ||||||
5099 | // the class of which the function template is a member. | ||||||
5100 | // | ||||||
5101 | // Note that we interpret this to mean "if one of the function | ||||||
5102 | // templates is a non-static member and the other is a non-member"; | ||||||
5103 | // otherwise, the ordering rules for static functions against non-static | ||||||
5104 | // functions don't make any sense. | ||||||
5105 | // | ||||||
5106 | // C++98/03 doesn't have this provision but we've extended DR532 to cover | ||||||
5107 | // it as wording was broken prior to it. | ||||||
5108 | SmallVector<QualType, 4> Args1; | ||||||
5109 | |||||||
5110 | unsigned NumComparedArguments = NumCallArguments1; | ||||||
5111 | |||||||
5112 | if (!Method2 && Method1 && !Method1->isStatic()) { | ||||||
5113 | // Compare 'this' from Method1 against first parameter from Method2. | ||||||
5114 | AddImplicitObjectParameterType(S.Context, Method1, Args1); | ||||||
5115 | ++NumComparedArguments; | ||||||
5116 | } else if (!Method1 && Method2 && !Method2->isStatic()) { | ||||||
5117 | // Compare 'this' from Method2 against first parameter from Method1. | ||||||
5118 | AddImplicitObjectParameterType(S.Context, Method2, Args2); | ||||||
5119 | } else if (Method1 && Method2 && Reversed) { | ||||||
5120 | // Compare 'this' from Method1 against second parameter from Method2 | ||||||
5121 | // and 'this' from Method2 against second parameter from Method1. | ||||||
5122 | AddImplicitObjectParameterType(S.Context, Method1, Args1); | ||||||
5123 | AddImplicitObjectParameterType(S.Context, Method2, Args2); | ||||||
5124 | ++NumComparedArguments; | ||||||
5125 | } | ||||||
5126 | |||||||
5127 | Args1.insert(Args1.end(), Proto1->param_type_begin(), | ||||||
5128 | Proto1->param_type_end()); | ||||||
5129 | Args2.insert(Args2.end(), Proto2->param_type_begin(), | ||||||
5130 | Proto2->param_type_end()); | ||||||
5131 | |||||||
5132 | // C++ [temp.func.order]p5: | ||||||
5133 | // The presence of unused ellipsis and default arguments has no effect on | ||||||
5134 | // the partial ordering of function templates. | ||||||
5135 | if (Args1.size() > NumComparedArguments) | ||||||
5136 | Args1.resize(NumComparedArguments); | ||||||
5137 | if (Args2.size() > NumComparedArguments) | ||||||
5138 | Args2.resize(NumComparedArguments); | ||||||
5139 | if (Reversed) | ||||||
5140 | std::reverse(Args2.begin(), Args2.end()); | ||||||
5141 | if (DeduceTemplateArguments(S, TemplateParams, Args2.data(), Args2.size(), | ||||||
5142 | Args1.data(), Args1.size(), Info, Deduced, | ||||||
5143 | TDF_None, /*PartialOrdering=*/true)) | ||||||
5144 | return false; | ||||||
5145 | |||||||
5146 | break; | ||||||
5147 | } | ||||||
5148 | |||||||
5149 | case TPOC_Conversion: | ||||||
5150 | // - In the context of a call to a conversion operator, the return types | ||||||
5151 | // of the conversion function templates are used. | ||||||
5152 | if (DeduceTemplateArgumentsByTypeMatch( | ||||||
5153 | S, TemplateParams, Proto2->getReturnType(), Proto1->getReturnType(), | ||||||
5154 | Info, Deduced, TDF_None, | ||||||
5155 | /*PartialOrdering=*/true)) | ||||||
5156 | return false; | ||||||
5157 | break; | ||||||
5158 | |||||||
5159 | case TPOC_Other: | ||||||
5160 | // - In other contexts (14.6.6.2) the function template's function type | ||||||
5161 | // is used. | ||||||
5162 | if (DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, | ||||||
5163 | FD2->getType(), FD1->getType(), | ||||||
5164 | Info, Deduced, TDF_None, | ||||||
5165 | /*PartialOrdering=*/true)) | ||||||
5166 | return false; | ||||||
5167 | break; | ||||||
5168 | } | ||||||
5169 | |||||||
5170 | // C++0x [temp.deduct.partial]p11: | ||||||
5171 | // In most cases, all template parameters must have values in order for | ||||||
5172 | // deduction to succeed, but for partial ordering purposes a template | ||||||
5173 | // parameter may remain without a value provided it is not used in the | ||||||
5174 | // types being used for partial ordering. [ Note: a template parameter used | ||||||
5175 | // in a non-deduced context is considered used. -end note] | ||||||
5176 | unsigned ArgIdx = 0, NumArgs = Deduced.size(); | ||||||
5177 | for (; ArgIdx != NumArgs; ++ArgIdx) | ||||||
5178 | if (Deduced[ArgIdx].isNull()) | ||||||
5179 | break; | ||||||
5180 | |||||||
5181 | // FIXME: We fail to implement [temp.deduct.type]p1 along this path. We need | ||||||
5182 | // to substitute the deduced arguments back into the template and check that | ||||||
5183 | // we get the right type. | ||||||
5184 | |||||||
5185 | if (ArgIdx == NumArgs) { | ||||||
5186 | // All template arguments were deduced. FT1 is at least as specialized | ||||||
5187 | // as FT2. | ||||||
5188 | return true; | ||||||
5189 | } | ||||||
5190 | |||||||
5191 | // Figure out which template parameters were used. | ||||||
5192 | llvm::SmallBitVector UsedParameters(TemplateParams->size()); | ||||||
5193 | switch (TPOC) { | ||||||
5194 | case TPOC_Call: | ||||||
5195 | for (unsigned I = 0, N = Args2.size(); I != N; ++I) | ||||||
5196 | ::MarkUsedTemplateParameters(S.Context, Args2[I], false, | ||||||
5197 | TemplateParams->getDepth(), | ||||||
5198 | UsedParameters); | ||||||
5199 | break; | ||||||
5200 | |||||||
5201 | case TPOC_Conversion: | ||||||
5202 | ::MarkUsedTemplateParameters(S.Context, Proto2->getReturnType(), false, | ||||||
5203 | TemplateParams->getDepth(), UsedParameters); | ||||||
5204 | break; | ||||||
5205 | |||||||
5206 | case TPOC_Other: | ||||||
5207 | ::MarkUsedTemplateParameters(S.Context, FD2->getType(), false, | ||||||
5208 | TemplateParams->getDepth(), | ||||||
5209 | UsedParameters); | ||||||
5210 | break; | ||||||
5211 | } | ||||||
5212 | |||||||
5213 | for (; ArgIdx != NumArgs; ++ArgIdx) | ||||||
5214 | // If this argument had no value deduced but was used in one of the types | ||||||
5215 | // used for partial ordering, then deduction fails. | ||||||
5216 | if (Deduced[ArgIdx].isNull() && UsedParameters[ArgIdx]) | ||||||
5217 | return false; | ||||||
5218 | |||||||
5219 | return true; | ||||||
5220 | } | ||||||
5221 | |||||||
5222 | /// Determine whether this a function template whose parameter-type-list | ||||||
5223 | /// ends with a function parameter pack. | ||||||
5224 | static bool isVariadicFunctionTemplate(FunctionTemplateDecl *FunTmpl) { | ||||||
5225 | FunctionDecl *Function = FunTmpl->getTemplatedDecl(); | ||||||
5226 | unsigned NumParams = Function->getNumParams(); | ||||||
5227 | if (NumParams == 0) | ||||||
5228 | return false; | ||||||
5229 | |||||||
5230 | ParmVarDecl *Last = Function->getParamDecl(NumParams - 1); | ||||||
5231 | if (!Last->isParameterPack()) | ||||||
5232 | return false; | ||||||
5233 | |||||||
5234 | // Make sure that no previous parameter is a parameter pack. | ||||||
5235 | while (--NumParams > 0) { | ||||||
5236 | if (Function->getParamDecl(NumParams - 1)->isParameterPack()) | ||||||
5237 | return false; | ||||||
5238 | } | ||||||
5239 | |||||||
5240 | return true; | ||||||
5241 | } | ||||||
5242 | |||||||
5243 | /// Returns the more specialized function template according | ||||||
5244 | /// to the rules of function template partial ordering (C++ [temp.func.order]). | ||||||
5245 | /// | ||||||
5246 | /// \param FT1 the first function template | ||||||
5247 | /// | ||||||
5248 | /// \param FT2 the second function template | ||||||
5249 | /// | ||||||
5250 | /// \param TPOC the context in which we are performing partial ordering of | ||||||
5251 | /// function templates. | ||||||
5252 | /// | ||||||
5253 | /// \param NumCallArguments1 The number of arguments in the call to FT1, used | ||||||
5254 | /// only when \c TPOC is \c TPOC_Call. | ||||||
5255 | /// | ||||||
5256 | /// \param NumCallArguments2 The number of arguments in the call to FT2, used | ||||||
5257 | /// only when \c TPOC is \c TPOC_Call. | ||||||
5258 | /// | ||||||
5259 | /// \param Reversed If \c true, exactly one of FT1 and FT2 is an overload | ||||||
5260 | /// candidate with a reversed parameter order. In this case, the corresponding | ||||||
5261 | /// P/A pairs between FT1 and FT2 are reversed. | ||||||
5262 | /// | ||||||
5263 | /// \returns the more specialized function template. If neither | ||||||
5264 | /// template is more specialized, returns NULL. | ||||||
5265 | FunctionTemplateDecl * | ||||||
5266 | Sema::getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, | ||||||
5267 | FunctionTemplateDecl *FT2, | ||||||
5268 | SourceLocation Loc, | ||||||
5269 | TemplatePartialOrderingContext TPOC, | ||||||
5270 | unsigned NumCallArguments1, | ||||||
5271 | unsigned NumCallArguments2, | ||||||
5272 | bool Reversed) { | ||||||
5273 | |||||||
5274 | auto JudgeByConstraints = [&] () -> FunctionTemplateDecl * { | ||||||
5275 | llvm::SmallVector<const Expr *, 3> AC1, AC2; | ||||||
5276 | FT1->getAssociatedConstraints(AC1); | ||||||
5277 | FT2->getAssociatedConstraints(AC2); | ||||||
5278 | bool AtLeastAsConstrained1, AtLeastAsConstrained2; | ||||||
5279 | if (IsAtLeastAsConstrained(FT1, AC1, FT2, AC2, AtLeastAsConstrained1)) | ||||||
5280 | return nullptr; | ||||||
5281 | if (IsAtLeastAsConstrained(FT2, AC2, FT1, AC1, AtLeastAsConstrained2)) | ||||||
5282 | return nullptr; | ||||||
5283 | if (AtLeastAsConstrained1 == AtLeastAsConstrained2) | ||||||
5284 | return nullptr; | ||||||
5285 | return AtLeastAsConstrained1 ? FT1 : FT2; | ||||||
5286 | }; | ||||||
5287 | |||||||
5288 | bool Better1 = isAtLeastAsSpecializedAs(*this, Loc, FT1, FT2, TPOC, | ||||||
5289 | NumCallArguments1, Reversed); | ||||||
5290 | bool Better2 = isAtLeastAsSpecializedAs(*this, Loc, FT2, FT1, TPOC, | ||||||
5291 | NumCallArguments2, Reversed); | ||||||
5292 | |||||||
5293 | if (Better1 != Better2) // We have a clear winner | ||||||
5294 | return Better1 ? FT1 : FT2; | ||||||
5295 | |||||||
5296 | if (!Better1 && !Better2) // Neither is better than the other | ||||||
5297 | return JudgeByConstraints(); | ||||||
5298 | |||||||
5299 | // FIXME: This mimics what GCC implements, but doesn't match up with the | ||||||
5300 | // proposed resolution for core issue 692. This area needs to be sorted out, | ||||||
5301 | // but for now we attempt to maintain compatibility. | ||||||
5302 | bool Variadic1 = isVariadicFunctionTemplate(FT1); | ||||||
5303 | bool Variadic2 = isVariadicFunctionTemplate(FT2); | ||||||
5304 | if (Variadic1 != Variadic2) | ||||||
5305 | return Variadic1? FT2 : FT1; | ||||||
5306 | |||||||
5307 | return JudgeByConstraints(); | ||||||
5308 | } | ||||||
5309 | |||||||
5310 | /// Determine if the two templates are equivalent. | ||||||
5311 | static bool isSameTemplate(TemplateDecl *T1, TemplateDecl *T2) { | ||||||
5312 | if (T1 == T2) | ||||||
5313 | return true; | ||||||
5314 | |||||||
5315 | if (!T1 || !T2) | ||||||
5316 | return false; | ||||||
5317 | |||||||
5318 | return T1->getCanonicalDecl() == T2->getCanonicalDecl(); | ||||||
5319 | } | ||||||
5320 | |||||||
5321 | /// Retrieve the most specialized of the given function template | ||||||
5322 | /// specializations. | ||||||
5323 | /// | ||||||
5324 | /// \param SpecBegin the start iterator of the function template | ||||||
5325 | /// specializations that we will be comparing. | ||||||
5326 | /// | ||||||
5327 | /// \param SpecEnd the end iterator of the function template | ||||||
5328 | /// specializations, paired with \p SpecBegin. | ||||||
5329 | /// | ||||||
5330 | /// \param Loc the location where the ambiguity or no-specializations | ||||||
5331 | /// diagnostic should occur. | ||||||
5332 | /// | ||||||
5333 | /// \param NoneDiag partial diagnostic used to diagnose cases where there are | ||||||
5334 | /// no matching candidates. | ||||||
5335 | /// | ||||||
5336 | /// \param AmbigDiag partial diagnostic used to diagnose an ambiguity, if one | ||||||
5337 | /// occurs. | ||||||
5338 | /// | ||||||
5339 | /// \param CandidateDiag partial diagnostic used for each function template | ||||||
5340 | /// specialization that is a candidate in the ambiguous ordering. One parameter | ||||||
5341 | /// in this diagnostic should be unbound, which will correspond to the string | ||||||
5342 | /// describing the template arguments for the function template specialization. | ||||||
5343 | /// | ||||||
5344 | /// \returns the most specialized function template specialization, if | ||||||
5345 | /// found. Otherwise, returns SpecEnd. | ||||||
5346 | UnresolvedSetIterator Sema::getMostSpecialized( | ||||||
5347 | UnresolvedSetIterator SpecBegin, UnresolvedSetIterator SpecEnd, | ||||||
5348 | TemplateSpecCandidateSet &FailedCandidates, | ||||||
5349 | SourceLocation Loc, const PartialDiagnostic &NoneDiag, | ||||||
5350 | const PartialDiagnostic &AmbigDiag, const PartialDiagnostic &CandidateDiag, | ||||||
5351 | bool Complain, QualType TargetType) { | ||||||
5352 | if (SpecBegin == SpecEnd) { | ||||||
5353 | if (Complain) { | ||||||
5354 | Diag(Loc, NoneDiag); | ||||||
5355 | FailedCandidates.NoteCandidates(*this, Loc); | ||||||
5356 | } | ||||||
5357 | return SpecEnd; | ||||||
5358 | } | ||||||
5359 | |||||||
5360 | if (SpecBegin + 1 == SpecEnd) | ||||||
5361 | return SpecBegin; | ||||||
5362 | |||||||
5363 | // Find the function template that is better than all of the templates it | ||||||
5364 | // has been compared to. | ||||||
5365 | UnresolvedSetIterator Best = SpecBegin; | ||||||
5366 | FunctionTemplateDecl *BestTemplate | ||||||
5367 | = cast<FunctionDecl>(*Best)->getPrimaryTemplate(); | ||||||
5368 | assert(BestTemplate && "Not a function template specialization?")((BestTemplate && "Not a function template specialization?" ) ? static_cast<void> (0) : __assert_fail ("BestTemplate && \"Not a function template specialization?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5368, __PRETTY_FUNCTION__)); | ||||||
5369 | for (UnresolvedSetIterator I = SpecBegin + 1; I != SpecEnd; ++I) { | ||||||
5370 | FunctionTemplateDecl *Challenger | ||||||
5371 | = cast<FunctionDecl>(*I)->getPrimaryTemplate(); | ||||||
5372 | assert(Challenger && "Not a function template specialization?")((Challenger && "Not a function template specialization?" ) ? static_cast<void> (0) : __assert_fail ("Challenger && \"Not a function template specialization?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5372, __PRETTY_FUNCTION__)); | ||||||
5373 | if (isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, | ||||||
5374 | Loc, TPOC_Other, 0, 0), | ||||||
5375 | Challenger)) { | ||||||
5376 | Best = I; | ||||||
5377 | BestTemplate = Challenger; | ||||||
5378 | } | ||||||
5379 | } | ||||||
5380 | |||||||
5381 | // Make sure that the "best" function template is more specialized than all | ||||||
5382 | // of the others. | ||||||
5383 | bool Ambiguous = false; | ||||||
5384 | for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) { | ||||||
5385 | FunctionTemplateDecl *Challenger | ||||||
5386 | = cast<FunctionDecl>(*I)->getPrimaryTemplate(); | ||||||
5387 | if (I != Best && | ||||||
5388 | !isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, | ||||||
5389 | Loc, TPOC_Other, 0, 0), | ||||||
5390 | BestTemplate)) { | ||||||
5391 | Ambiguous = true; | ||||||
5392 | break; | ||||||
5393 | } | ||||||
5394 | } | ||||||
5395 | |||||||
5396 | if (!Ambiguous) { | ||||||
5397 | // We found an answer. Return it. | ||||||
5398 | return Best; | ||||||
5399 | } | ||||||
5400 | |||||||
5401 | // Diagnose the ambiguity. | ||||||
5402 | if (Complain) { | ||||||
5403 | Diag(Loc, AmbigDiag); | ||||||
5404 | |||||||
5405 | // FIXME: Can we order the candidates in some sane way? | ||||||
5406 | for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) { | ||||||
5407 | PartialDiagnostic PD = CandidateDiag; | ||||||
5408 | const auto *FD = cast<FunctionDecl>(*I); | ||||||
5409 | PD << FD << getTemplateArgumentBindingsText( | ||||||
5410 | FD->getPrimaryTemplate()->getTemplateParameters(), | ||||||
5411 | *FD->getTemplateSpecializationArgs()); | ||||||
5412 | if (!TargetType.isNull()) | ||||||
5413 | HandleFunctionTypeMismatch(PD, FD->getType(), TargetType); | ||||||
5414 | Diag((*I)->getLocation(), PD); | ||||||
5415 | } | ||||||
5416 | } | ||||||
5417 | |||||||
5418 | return SpecEnd; | ||||||
5419 | } | ||||||
5420 | |||||||
5421 | /// Determine whether one partial specialization, P1, is at least as | ||||||
5422 | /// specialized than another, P2. | ||||||
5423 | /// | ||||||
5424 | /// \tparam TemplateLikeDecl The kind of P2, which must be a | ||||||
5425 | /// TemplateDecl or {Class,Var}TemplatePartialSpecializationDecl. | ||||||
5426 | /// \param T1 The injected-class-name of P1 (faked for a variable template). | ||||||
5427 | /// \param T2 The injected-class-name of P2 (faked for a variable template). | ||||||
5428 | template<typename TemplateLikeDecl> | ||||||
5429 | static bool isAtLeastAsSpecializedAs(Sema &S, QualType T1, QualType T2, | ||||||
5430 | TemplateLikeDecl *P2, | ||||||
5431 | TemplateDeductionInfo &Info) { | ||||||
5432 | // C++ [temp.class.order]p1: | ||||||
5433 | // For two class template partial specializations, the first is at least as | ||||||
5434 | // specialized as the second if, given the following rewrite to two | ||||||
5435 | // function templates, the first function template is at least as | ||||||
5436 | // specialized as the second according to the ordering rules for function | ||||||
5437 | // templates (14.6.6.2): | ||||||
5438 | // - the first function template has the same template parameters as the | ||||||
5439 | // first partial specialization and has a single function parameter | ||||||
5440 | // whose type is a class template specialization with the template | ||||||
5441 | // arguments of the first partial specialization, and | ||||||
5442 | // - the second function template has the same template parameters as the | ||||||
5443 | // second partial specialization and has a single function parameter | ||||||
5444 | // whose type is a class template specialization with the template | ||||||
5445 | // arguments of the second partial specialization. | ||||||
5446 | // | ||||||
5447 | // Rather than synthesize function templates, we merely perform the | ||||||
5448 | // equivalent partial ordering by performing deduction directly on | ||||||
5449 | // the template arguments of the class template partial | ||||||
5450 | // specializations. This computation is slightly simpler than the | ||||||
5451 | // general problem of function template partial ordering, because | ||||||
5452 | // class template partial specializations are more constrained. We | ||||||
5453 | // know that every template parameter is deducible from the class | ||||||
5454 | // template partial specialization's template arguments, for | ||||||
5455 | // example. | ||||||
5456 | SmallVector<DeducedTemplateArgument, 4> Deduced; | ||||||
5457 | |||||||
5458 | // Determine whether P1 is at least as specialized as P2. | ||||||
5459 | Deduced.resize(P2->getTemplateParameters()->size()); | ||||||
5460 | if (DeduceTemplateArgumentsByTypeMatch(S, P2->getTemplateParameters(), | ||||||
5461 | T2, T1, Info, Deduced, TDF_None, | ||||||
5462 | /*PartialOrdering=*/true)) | ||||||
5463 | return false; | ||||||
5464 | |||||||
5465 | SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), | ||||||
5466 | Deduced.end()); | ||||||
5467 | Sema::InstantiatingTemplate Inst(S, Info.getLocation(), P2, DeducedArgs, | ||||||
5468 | Info); | ||||||
5469 | auto *TST1 = T1->castAs<TemplateSpecializationType>(); | ||||||
5470 | bool AtLeastAsSpecialized; | ||||||
5471 | S.runWithSufficientStackSpace(Info.getLocation(), [&] { | ||||||
5472 | AtLeastAsSpecialized = !FinishTemplateArgumentDeduction( | ||||||
5473 | S, P2, /*IsPartialOrdering=*/true, | ||||||
5474 | TemplateArgumentList(TemplateArgumentList::OnStack, | ||||||
5475 | TST1->template_arguments()), | ||||||
5476 | Deduced, Info); | ||||||
5477 | }); | ||||||
5478 | return AtLeastAsSpecialized; | ||||||
5479 | } | ||||||
5480 | |||||||
5481 | /// Returns the more specialized class template partial specialization | ||||||
5482 | /// according to the rules of partial ordering of class template partial | ||||||
5483 | /// specializations (C++ [temp.class.order]). | ||||||
5484 | /// | ||||||
5485 | /// \param PS1 the first class template partial specialization | ||||||
5486 | /// | ||||||
5487 | /// \param PS2 the second class template partial specialization | ||||||
5488 | /// | ||||||
5489 | /// \returns the more specialized class template partial specialization. If | ||||||
5490 | /// neither partial specialization is more specialized, returns NULL. | ||||||
5491 | ClassTemplatePartialSpecializationDecl * | ||||||
5492 | Sema::getMoreSpecializedPartialSpecialization( | ||||||
5493 | ClassTemplatePartialSpecializationDecl *PS1, | ||||||
5494 | ClassTemplatePartialSpecializationDecl *PS2, | ||||||
5495 | SourceLocation Loc) { | ||||||
5496 | QualType PT1 = PS1->getInjectedSpecializationType(); | ||||||
5497 | QualType PT2 = PS2->getInjectedSpecializationType(); | ||||||
5498 | |||||||
5499 | TemplateDeductionInfo Info(Loc); | ||||||
5500 | bool Better1 = isAtLeastAsSpecializedAs(*this, PT1, PT2, PS2, Info); | ||||||
5501 | bool Better2 = isAtLeastAsSpecializedAs(*this, PT2, PT1, PS1, Info); | ||||||
5502 | |||||||
5503 | if (!Better1 && !Better2) | ||||||
5504 | return nullptr; | ||||||
5505 | if (Better1 && Better2) { | ||||||
5506 | llvm::SmallVector<const Expr *, 3> AC1, AC2; | ||||||
5507 | PS1->getAssociatedConstraints(AC1); | ||||||
5508 | PS2->getAssociatedConstraints(AC2); | ||||||
5509 | bool AtLeastAsConstrained1, AtLeastAsConstrained2; | ||||||
5510 | if (IsAtLeastAsConstrained(PS1, AC1, PS2, AC2, AtLeastAsConstrained1)) | ||||||
5511 | return nullptr; | ||||||
5512 | if (IsAtLeastAsConstrained(PS2, AC2, PS1, AC1, AtLeastAsConstrained2)) | ||||||
5513 | return nullptr; | ||||||
5514 | if (AtLeastAsConstrained1 == AtLeastAsConstrained2) | ||||||
5515 | return nullptr; | ||||||
5516 | return AtLeastAsConstrained1 ? PS1 : PS2; | ||||||
5517 | } | ||||||
5518 | |||||||
5519 | return Better1 ? PS1 : PS2; | ||||||
5520 | } | ||||||
5521 | |||||||
5522 | bool Sema::isMoreSpecializedThanPrimary( | ||||||
5523 | ClassTemplatePartialSpecializationDecl *Spec, TemplateDeductionInfo &Info) { | ||||||
5524 | ClassTemplateDecl *Primary = Spec->getSpecializedTemplate(); | ||||||
5525 | QualType PrimaryT = Primary->getInjectedClassNameSpecialization(); | ||||||
5526 | QualType PartialT = Spec->getInjectedSpecializationType(); | ||||||
5527 | if (!isAtLeastAsSpecializedAs(*this, PartialT, PrimaryT, Primary, Info)) | ||||||
5528 | return false; | ||||||
5529 | if (!isAtLeastAsSpecializedAs(*this, PrimaryT, PartialT, Spec, Info)) | ||||||
5530 | return true; | ||||||
5531 | Info.clearSFINAEDiagnostic(); | ||||||
5532 | llvm::SmallVector<const Expr *, 3> PrimaryAC, SpecAC; | ||||||
5533 | Primary->getAssociatedConstraints(PrimaryAC); | ||||||
5534 | Spec->getAssociatedConstraints(SpecAC); | ||||||
5535 | bool AtLeastAsConstrainedPrimary, AtLeastAsConstrainedSpec; | ||||||
5536 | if (IsAtLeastAsConstrained(Spec, SpecAC, Primary, PrimaryAC, | ||||||
5537 | AtLeastAsConstrainedSpec)) | ||||||
5538 | return false; | ||||||
5539 | if (!AtLeastAsConstrainedSpec) | ||||||
5540 | return false; | ||||||
5541 | if (IsAtLeastAsConstrained(Primary, PrimaryAC, Spec, SpecAC, | ||||||
5542 | AtLeastAsConstrainedPrimary)) | ||||||
5543 | return false; | ||||||
5544 | return !AtLeastAsConstrainedPrimary; | ||||||
5545 | } | ||||||
5546 | |||||||
5547 | VarTemplatePartialSpecializationDecl * | ||||||
5548 | Sema::getMoreSpecializedPartialSpecialization( | ||||||
5549 | VarTemplatePartialSpecializationDecl *PS1, | ||||||
5550 | VarTemplatePartialSpecializationDecl *PS2, SourceLocation Loc) { | ||||||
5551 | // Pretend the variable template specializations are class template | ||||||
5552 | // specializations and form a fake injected class name type for comparison. | ||||||
5553 | assert(PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate() &&((PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate () && "the partial specializations being compared should specialize" " the same template.") ? static_cast<void> (0) : __assert_fail ("PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate() && \"the partial specializations being compared should specialize\" \" the same template.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5555, __PRETTY_FUNCTION__)) | ||||||
5554 | "the partial specializations being compared should specialize"((PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate () && "the partial specializations being compared should specialize" " the same template.") ? static_cast<void> (0) : __assert_fail ("PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate() && \"the partial specializations being compared should specialize\" \" the same template.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5555, __PRETTY_FUNCTION__)) | ||||||
5555 | " the same template.")((PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate () && "the partial specializations being compared should specialize" " the same template.") ? static_cast<void> (0) : __assert_fail ("PS1->getSpecializedTemplate() == PS2->getSpecializedTemplate() && \"the partial specializations being compared should specialize\" \" the same template.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5555, __PRETTY_FUNCTION__)); | ||||||
5556 | TemplateName Name(PS1->getSpecializedTemplate()); | ||||||
5557 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); | ||||||
5558 | QualType PT1 = Context.getTemplateSpecializationType( | ||||||
5559 | CanonTemplate, PS1->getTemplateArgs().asArray()); | ||||||
5560 | QualType PT2 = Context.getTemplateSpecializationType( | ||||||
5561 | CanonTemplate, PS2->getTemplateArgs().asArray()); | ||||||
5562 | |||||||
5563 | TemplateDeductionInfo Info(Loc); | ||||||
5564 | bool Better1 = isAtLeastAsSpecializedAs(*this, PT1, PT2, PS2, Info); | ||||||
5565 | bool Better2 = isAtLeastAsSpecializedAs(*this, PT2, PT1, PS1, Info); | ||||||
5566 | |||||||
5567 | if (!Better1 && !Better2) | ||||||
5568 | return nullptr; | ||||||
5569 | if (Better1 && Better2) { | ||||||
5570 | llvm::SmallVector<const Expr *, 3> AC1, AC2; | ||||||
5571 | PS1->getAssociatedConstraints(AC1); | ||||||
5572 | PS2->getAssociatedConstraints(AC2); | ||||||
5573 | bool AtLeastAsConstrained1, AtLeastAsConstrained2; | ||||||
5574 | if (IsAtLeastAsConstrained(PS1, AC1, PS2, AC2, AtLeastAsConstrained1)) | ||||||
5575 | return nullptr; | ||||||
5576 | if (IsAtLeastAsConstrained(PS2, AC2, PS1, AC1, AtLeastAsConstrained2)) | ||||||
5577 | return nullptr; | ||||||
5578 | if (AtLeastAsConstrained1 == AtLeastAsConstrained2) | ||||||
5579 | return nullptr; | ||||||
5580 | return AtLeastAsConstrained1 ? PS1 : PS2; | ||||||
5581 | } | ||||||
5582 | |||||||
5583 | return Better1 ? PS1 : PS2; | ||||||
5584 | } | ||||||
5585 | |||||||
5586 | bool Sema::isMoreSpecializedThanPrimary( | ||||||
5587 | VarTemplatePartialSpecializationDecl *Spec, TemplateDeductionInfo &Info) { | ||||||
5588 | TemplateDecl *Primary = Spec->getSpecializedTemplate(); | ||||||
5589 | // FIXME: Cache the injected template arguments rather than recomputing | ||||||
5590 | // them for each partial specialization. | ||||||
5591 | SmallVector<TemplateArgument, 8> PrimaryArgs; | ||||||
5592 | Context.getInjectedTemplateArgs(Primary->getTemplateParameters(), | ||||||
5593 | PrimaryArgs); | ||||||
5594 | |||||||
5595 | TemplateName CanonTemplate = | ||||||
5596 | Context.getCanonicalTemplateName(TemplateName(Primary)); | ||||||
5597 | QualType PrimaryT = Context.getTemplateSpecializationType( | ||||||
5598 | CanonTemplate, PrimaryArgs); | ||||||
5599 | QualType PartialT = Context.getTemplateSpecializationType( | ||||||
5600 | CanonTemplate, Spec->getTemplateArgs().asArray()); | ||||||
5601 | |||||||
5602 | if (!isAtLeastAsSpecializedAs(*this, PartialT, PrimaryT, Primary, Info)) | ||||||
5603 | return false; | ||||||
5604 | if (!isAtLeastAsSpecializedAs(*this, PrimaryT, PartialT, Spec, Info)) | ||||||
5605 | return true; | ||||||
5606 | Info.clearSFINAEDiagnostic(); | ||||||
5607 | llvm::SmallVector<const Expr *, 3> PrimaryAC, SpecAC; | ||||||
5608 | Primary->getAssociatedConstraints(PrimaryAC); | ||||||
5609 | Spec->getAssociatedConstraints(SpecAC); | ||||||
5610 | bool AtLeastAsConstrainedPrimary, AtLeastAsConstrainedSpec; | ||||||
5611 | if (IsAtLeastAsConstrained(Spec, SpecAC, Primary, PrimaryAC, | ||||||
5612 | AtLeastAsConstrainedSpec)) | ||||||
5613 | return false; | ||||||
5614 | if (!AtLeastAsConstrainedSpec) | ||||||
5615 | return false; | ||||||
5616 | if (IsAtLeastAsConstrained(Primary, PrimaryAC, Spec, SpecAC, | ||||||
5617 | AtLeastAsConstrainedPrimary)) | ||||||
5618 | return false; | ||||||
5619 | return !AtLeastAsConstrainedPrimary; | ||||||
5620 | } | ||||||
5621 | |||||||
5622 | bool Sema::isTemplateTemplateParameterAtLeastAsSpecializedAs( | ||||||
5623 | TemplateParameterList *P, TemplateDecl *AArg, SourceLocation Loc) { | ||||||
5624 | // C++1z [temp.arg.template]p4: (DR 150) | ||||||
5625 | // A template template-parameter P is at least as specialized as a | ||||||
5626 | // template template-argument A if, given the following rewrite to two | ||||||
5627 | // function templates... | ||||||
5628 | |||||||
5629 | // Rather than synthesize function templates, we merely perform the | ||||||
5630 | // equivalent partial ordering by performing deduction directly on | ||||||
5631 | // the template parameter lists of the template template parameters. | ||||||
5632 | // | ||||||
5633 | // Given an invented class template X with the template parameter list of | ||||||
5634 | // A (including default arguments): | ||||||
5635 | TemplateName X = Context.getCanonicalTemplateName(TemplateName(AArg)); | ||||||
5636 | TemplateParameterList *A = AArg->getTemplateParameters(); | ||||||
5637 | |||||||
5638 | // - Each function template has a single function parameter whose type is | ||||||
5639 | // a specialization of X with template arguments corresponding to the | ||||||
5640 | // template parameters from the respective function template | ||||||
5641 | SmallVector<TemplateArgument, 8> AArgs; | ||||||
5642 | Context.getInjectedTemplateArgs(A, AArgs); | ||||||
5643 | |||||||
5644 | // Check P's arguments against A's parameter list. This will fill in default | ||||||
5645 | // template arguments as needed. AArgs are already correct by construction. | ||||||
5646 | // We can't just use CheckTemplateIdType because that will expand alias | ||||||
5647 | // templates. | ||||||
5648 | SmallVector<TemplateArgument, 4> PArgs; | ||||||
5649 | { | ||||||
5650 | SFINAETrap Trap(*this); | ||||||
5651 | |||||||
5652 | Context.getInjectedTemplateArgs(P, PArgs); | ||||||
5653 | TemplateArgumentListInfo PArgList(P->getLAngleLoc(), | ||||||
5654 | P->getRAngleLoc()); | ||||||
5655 | for (unsigned I = 0, N = P->size(); I != N; ++I) { | ||||||
5656 | // Unwrap packs that getInjectedTemplateArgs wrapped around pack | ||||||
5657 | // expansions, to form an "as written" argument list. | ||||||
5658 | TemplateArgument Arg = PArgs[I]; | ||||||
5659 | if (Arg.getKind() == TemplateArgument::Pack) { | ||||||
5660 | assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion())((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion ()) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateDeduction.cpp" , 5660, __PRETTY_FUNCTION__)); | ||||||
5661 | Arg = *Arg.pack_begin(); | ||||||
5662 | } | ||||||
5663 | PArgList.addArgument(getTrivialTemplateArgumentLoc( | ||||||
5664 | Arg, QualType(), P->getParam(I)->getLocation())); | ||||||
5665 | } | ||||||
5666 | PArgs.clear(); | ||||||
5667 | |||||||
5668 | // C++1z [temp.arg.template]p3: | ||||||
5669 | // If the rewrite produces an invalid type, then P is not at least as | ||||||
5670 | // specialized as A. | ||||||
5671 | if (CheckTemplateArgumentList(AArg, Loc, PArgList, false, PArgs) || | ||||||
5672 | Trap.hasErrorOccurred()) | ||||||
5673 | return false; | ||||||
5674 | } | ||||||
5675 | |||||||
5676 | QualType AType = Context.getTemplateSpecializationType(X, AArgs); | ||||||
5677 | QualType PType = Context.getTemplateSpecializationType(X, PArgs); | ||||||
5678 | |||||||
5679 | // ... the function template corresponding to P is at least as specialized | ||||||
5680 | // as the function template corresponding to A according to the partial | ||||||
5681 | // ordering rules for function templates. | ||||||
5682 | TemplateDeductionInfo Info(Loc, A->getDepth()); | ||||||
5683 | return isAtLeastAsSpecializedAs(*this, PType, AType, AArg, Info); | ||||||
5684 | } | ||||||
5685 | |||||||
5686 | namespace { | ||||||
5687 | struct MarkUsedTemplateParameterVisitor : | ||||||
5688 | RecursiveASTVisitor<MarkUsedTemplateParameterVisitor> { | ||||||
5689 | llvm::SmallBitVector &Used; | ||||||
5690 | unsigned Depth; | ||||||
5691 | |||||||
5692 | MarkUsedTemplateParameterVisitor(llvm::SmallBitVector &Used, | ||||||
5693 | unsigned Depth) | ||||||
5694 | : Used(Used), Depth(Depth) { } | ||||||
5695 | |||||||
5696 | bool VisitTemplateTypeParmType(TemplateTypeParmType *T) { | ||||||
5697 | if (T->getDepth() == Depth) | ||||||
5698 | Used[T->getIndex()] = true; | ||||||
5699 | return true; | ||||||
5700 | } | ||||||
5701 | |||||||
5702 | bool TraverseTemplateName(TemplateName Template) { | ||||||
5703 | if (auto *TTP = | ||||||
5704 | dyn_cast<TemplateTemplateParmDecl>(Template.getAsTemplateDecl())) | ||||||
5705 | if (TTP->getDepth() == Depth) | ||||||
5706 | Used[TTP->getIndex()] = true; | ||||||
5707 | RecursiveASTVisitor<MarkUsedTemplateParameterVisitor>:: | ||||||
5708 | TraverseTemplateName(Template); | ||||||
5709 | return true; | ||||||
5710 | } | ||||||
5711 | |||||||
5712 | bool VisitDeclRefExpr(DeclRefExpr *E) { | ||||||
5713 | if (auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(E->getDecl())) | ||||||
5714 | if (NTTP->getDepth() == Depth) | ||||||
5715 | Used[NTTP->getIndex()] = true; | ||||||
5716 | return true; | ||||||
5717 | } | ||||||
5718 | }; | ||||||
5719 | } | ||||||
5720 | |||||||
5721 | /// Mark the template parameters that are used by the given | ||||||
5722 | /// expression. | ||||||
5723 | static void | ||||||
5724 | MarkUsedTemplateParameters(ASTContext &Ctx, | ||||||
5725 | const Expr *E, | ||||||
5726 | bool OnlyDeduced, | ||||||
5727 | unsigned Depth, | ||||||
5728 | llvm::SmallBitVector &Used) { | ||||||
5729 | if (!OnlyDeduced) { | ||||||
5730 | MarkUsedTemplateParameterVisitor(Used, Depth) | ||||||
5731 | .TraverseStmt(const_cast<Expr *>(E)); | ||||||
5732 | return; | ||||||
5733 | } | ||||||
5734 | |||||||
5735 | // We can deduce from a pack expansion. | ||||||
5736 | if (const PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(E)) | ||||||
5737 | E = Expansion->getPattern(); | ||||||
5738 | |||||||
5739 | const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr(E, Depth); | ||||||
5740 | if (!NTTP) | ||||||
5741 | return; | ||||||
5742 | |||||||
5743 | if (NTTP->getDepth() == Depth) | ||||||
5744 | Used[NTTP->getIndex()] = true; | ||||||
5745 | |||||||
5746 | // In C++17 mode, additional arguments may be deduced from the type of a | ||||||
5747 | // non-type argument. | ||||||
5748 | if (Ctx.getLangOpts().CPlusPlus17) | ||||||
5749 | MarkUsedTemplateParameters(Ctx, NTTP->getType(), OnlyDeduced, Depth, Used); | ||||||
5750 | } | ||||||
5751 | |||||||
5752 | /// Mark the template parameters that are used by the given | ||||||
5753 | /// nested name specifier. | ||||||
5754 | static void | ||||||
5755 | MarkUsedTemplateParameters(ASTContext &Ctx, | ||||||
5756 | NestedNameSpecifier *NNS, | ||||||
5757 | bool OnlyDeduced, | ||||||
5758 | unsigned Depth, | ||||||
5759 | llvm::SmallBitVector &Used) { | ||||||
5760 | if (!NNS) | ||||||
5761 | return; | ||||||
5762 | |||||||
5763 | MarkUsedTemplateParameters(Ctx, NNS->getPrefix(), OnlyDeduced, Depth, | ||||||
5764 | Used); | ||||||
5765 | MarkUsedTemplateParameters(Ctx, QualType(NNS->getAsType(), 0), | ||||||
5766 | OnlyDeduced, Depth, Used); | ||||||
5767 | } | ||||||
5768 | |||||||
5769 | /// Mark the template parameters that are used by the given | ||||||
5770 | /// template name. | ||||||
5771 | static void | ||||||
5772 | MarkUsedTemplateParameters(ASTContext &Ctx, | ||||||
5773 | TemplateName Name, | ||||||
5774 | bool OnlyDeduced, | ||||||
5775 | unsigned Depth, | ||||||
5776 | llvm::SmallBitVector &Used) { | ||||||
5777 | if (TemplateDecl *Template = Name.getAsTemplateDecl()) { | ||||||
5778 | if (TemplateTemplateParmDecl *TTP | ||||||
5779 | = dyn_cast<TemplateTemplateParmDecl>(Template)) { | ||||||
5780 | if (TTP->getDepth() == Depth) | ||||||
5781 | Used[TTP->getIndex()] = true; | ||||||
5782 | } | ||||||
5783 | return; | ||||||
5784 | } | ||||||
5785 | |||||||
5786 | if (QualifiedTemplateName *QTN = Name.getAsQualifiedTemplateName()) | ||||||
5787 | MarkUsedTemplateParameters(Ctx, QTN->getQualifier(), OnlyDeduced, | ||||||
5788 | Depth, Used); | ||||||
5789 | if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) | ||||||
5790 | MarkUsedTemplateParameters(Ctx, DTN->getQualifier(), OnlyDeduced, | ||||||
5791 | Depth, Used); | ||||||
5792 | } | ||||||
5793 | |||||||
5794 | /// Mark the template parameters that are used by the given | ||||||
5795 | /// type. | ||||||
5796 | static void | ||||||
5797 | MarkUsedTemplateParameters(ASTContext &Ctx, QualType T, | ||||||
5798 | bool OnlyDeduced, | ||||||
5799 | unsigned Depth, | ||||||
5800 | llvm::SmallBitVector &Used) { | ||||||
5801 | if (T.isNull()) | ||||||
5802 | return; | ||||||
5803 | |||||||
5804 | // Non-dependent types have nothing deducible | ||||||
5805 | if (!T->isDependentType()) | ||||||
5806 | return; | ||||||
5807 | |||||||
5808 | T = Ctx.getCanonicalType(T); | ||||||
5809 | switch (T->getTypeClass()) { | ||||||
5810 | case Type::Pointer: | ||||||
5811 | MarkUsedTemplateParameters(Ctx, | ||||||
5812 | cast<PointerType>(T)->getPointeeType(), | ||||||
5813 | OnlyDeduced, | ||||||
5814 | Depth, | ||||||
5815 | Used); | ||||||
5816 | break; | ||||||
5817 | |||||||
5818 | case Type::BlockPointer: | ||||||
5819 | MarkUsedTemplateParameters(Ctx, | ||||||
5820 | cast<BlockPointerType>(T)->getPointeeType(), | ||||||
5821 | OnlyDeduced, | ||||||
5822 | Depth, | ||||||
5823 | Used); | ||||||
5824 | break; | ||||||
5825 | |||||||
5826 | case Type::LValueReference: | ||||||
5827 | case Type::RValueReference: | ||||||
5828 | MarkUsedTemplateParameters(Ctx, | ||||||
5829 | cast<ReferenceType>(T)->getPointeeType(), | ||||||
5830 | OnlyDeduced, | ||||||
5831 | Depth, | ||||||
5832 | Used); | ||||||
5833 | break; | ||||||
5834 | |||||||
5835 | case Type::MemberPointer: { | ||||||
5836 | const MemberPointerType *MemPtr = cast<MemberPointerType>(T.getTypePtr()); | ||||||
5837 | MarkUsedTemplateParameters(Ctx, MemPtr->getPointeeType(), OnlyDeduced, | ||||||
5838 | Depth, Used); | ||||||
5839 | MarkUsedTemplateParameters(Ctx, QualType(MemPtr->getClass(), 0), | ||||||
5840 | OnlyDeduced, Depth, Used); | ||||||
5841 | break; | ||||||
5842 | } | ||||||
5843 | |||||||
5844 | case Type::DependentSizedArray: | ||||||
5845 | MarkUsedTemplateParameters(Ctx, | ||||||
5846 | cast<DependentSizedArrayType>(T)->getSizeExpr(), | ||||||
5847 | OnlyDeduced, Depth, Used); | ||||||
5848 | // Fall through to check the element type | ||||||
5849 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
5850 | |||||||
5851 | case Type::ConstantArray: | ||||||
5852 | case Type::IncompleteArray: | ||||||
5853 | MarkUsedTemplateParameters(Ctx, | ||||||
5854 | cast<ArrayType>(T)->getElementType(), | ||||||
5855 | OnlyDeduced, Depth, Used); | ||||||
5856 | break; | ||||||
5857 | |||||||
5858 | case Type::Vector: | ||||||
5859 | case Type::ExtVector: | ||||||
5860 | MarkUsedTemplateParameters(Ctx, | ||||||
5861 | cast<VectorType>(T)->getElementType(), | ||||||
5862 | OnlyDeduced, Depth, Used); | ||||||
5863 | break; | ||||||
5864 | |||||||
5865 | case Type::DependentVector: { | ||||||
5866 | const auto *VecType = cast<DependentVectorType>(T); | ||||||
5867 | MarkUsedTemplateParameters(Ctx, VecType->getElementType(), OnlyDeduced, | ||||||
5868 | Depth, Used); | ||||||
5869 | MarkUsedTemplateParameters(Ctx, VecType->getSizeExpr(), OnlyDeduced, Depth, | ||||||
5870 | Used); | ||||||
5871 | break; | ||||||
5872 | } | ||||||
5873 | case Type::DependentSizedExtVector: { | ||||||
5874 | const DependentSizedExtVectorType *VecType | ||||||
5875 | = cast<DependentSizedExtVectorType>(T); | ||||||
5876 | MarkUsedTemplateParameters(Ctx, VecType->getElementType(), OnlyDeduced, | ||||||
5877 | Depth, Used); | ||||||
5878 | MarkUsedTemplateParameters(Ctx, VecType->getSizeExpr(), OnlyDeduced, | ||||||
5879 | Depth, Used); | ||||||
5880 | break; | ||||||
5881 | } | ||||||
5882 | |||||||
5883 | case Type::DependentAddressSpace: { | ||||||
5884 | const DependentAddressSpaceType *DependentASType = | ||||||
5885 | cast<DependentAddressSpaceType>(T); | ||||||
5886 | MarkUsedTemplateParameters(Ctx, DependentASType->getPointeeType(), | ||||||
5887 | OnlyDeduced, Depth, Used); | ||||||
5888 | MarkUsedTemplateParameters(Ctx, | ||||||
5889 | DependentASType->getAddrSpaceExpr(), | ||||||
5890 | OnlyDeduced, Depth, Used); | ||||||
5891 | break; | ||||||
5892 | } | ||||||
5893 | |||||||
5894 | case Type::ConstantMatrix: { | ||||||
5895 | const ConstantMatrixType *MatType = cast<ConstantMatrixType>(T); | ||||||
5896 | MarkUsedTemplateParameters(Ctx, MatType->getElementType(), OnlyDeduced, | ||||||
5897 | Depth, Used); | ||||||
5898 | break; | ||||||
5899 | } | ||||||
5900 | |||||||
5901 | case Type::DependentSizedMatrix: { | ||||||
5902 | const DependentSizedMatrixType *MatType = cast<DependentSizedMatrixType>(T); | ||||||
5903 | MarkUsedTemplateParameters(Ctx, MatType->getElementType(), OnlyDeduced, | ||||||
5904 | Depth, Used); | ||||||
5905 | MarkUsedTemplateParameters(Ctx, MatType->getRowExpr(), OnlyDeduced, Depth, | ||||||
5906 | Used); | ||||||
5907 | MarkUsedTemplateParameters(Ctx, MatType->getColumnExpr(), OnlyDeduced, | ||||||
5908 | Depth, Used); | ||||||
5909 | break; | ||||||
5910 | } | ||||||
5911 | |||||||
5912 | case Type::FunctionProto: { | ||||||
5913 | const FunctionProtoType *Proto = cast<FunctionProtoType>(T); | ||||||
5914 | MarkUsedTemplateParameters(Ctx, Proto->getReturnType(), OnlyDeduced, Depth, | ||||||
5915 | Used); | ||||||
5916 | for (unsigned I = 0, N = Proto->getNumParams(); I != N; ++I) { | ||||||
5917 | // C++17 [temp.deduct.type]p5: | ||||||
5918 | // The non-deduced contexts are: [...] | ||||||
5919 | // -- A function parameter pack that does not occur at the end of the | ||||||
5920 | // parameter-declaration-list. | ||||||
5921 | if (!OnlyDeduced || I + 1 == N || | ||||||
5922 | !Proto->getParamType(I)->getAs<PackExpansionType>()) { | ||||||
5923 | MarkUsedTemplateParameters(Ctx, Proto->getParamType(I), OnlyDeduced, | ||||||
5924 | Depth, Used); | ||||||
5925 | } else { | ||||||
5926 | // FIXME: C++17 [temp.deduct.call]p1: | ||||||
5927 | // When a function parameter pack appears in a non-deduced context, | ||||||
5928 | // the type of that pack is never deduced. | ||||||
5929 | // | ||||||
5930 | // We should also track a set of "never deduced" parameters, and | ||||||
5931 | // subtract that from the list of deduced parameters after marking. | ||||||
5932 | } | ||||||
5933 | } | ||||||
5934 | if (auto *E = Proto->getNoexceptExpr()) | ||||||
5935 | MarkUsedTemplateParameters(Ctx, E, OnlyDeduced, Depth, Used); | ||||||
5936 | break; | ||||||
5937 | } | ||||||
5938 | |||||||
5939 | case Type::TemplateTypeParm: { | ||||||
5940 | const TemplateTypeParmType *TTP = cast<TemplateTypeParmType>(T); | ||||||
5941 | if (TTP->getDepth() == Depth) | ||||||
5942 | Used[TTP->getIndex()] = true; | ||||||
5943 | break; | ||||||
5944 | } | ||||||
5945 | |||||||
5946 | case Type::SubstTemplateTypeParmPack: { | ||||||
5947 | const SubstTemplateTypeParmPackType *Subst | ||||||
5948 | = cast<SubstTemplateTypeParmPackType>(T); | ||||||
5949 | MarkUsedTemplateParameters(Ctx, | ||||||
5950 | QualType(Subst->getReplacedParameter(), 0), | ||||||
5951 | OnlyDeduced, Depth, Used); | ||||||
5952 | MarkUsedTemplateParameters(Ctx, Subst->getArgumentPack(), | ||||||
5953 | OnlyDeduced, Depth, Used); | ||||||
5954 | break; | ||||||
5955 | } | ||||||
5956 | |||||||
5957 | case Type::InjectedClassName: | ||||||
5958 | T = cast<InjectedClassNameType>(T)->getInjectedSpecializationType(); | ||||||
5959 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
5960 | |||||||
5961 | case Type::TemplateSpecialization: { | ||||||
5962 | const TemplateSpecializationType *Spec | ||||||
5963 | = cast<TemplateSpecializationType>(T); | ||||||
5964 | MarkUsedTemplateParameters(Ctx, Spec->getTemplateName(), OnlyDeduced, | ||||||
5965 | Depth, Used); | ||||||
5966 | |||||||
5967 | // C++0x [temp.deduct.type]p9: | ||||||
5968 | // If the template argument list of P contains a pack expansion that is | ||||||
5969 | // not the last template argument, the entire template argument list is a | ||||||
5970 | // non-deduced context. | ||||||
5971 | if (OnlyDeduced && | ||||||
5972 | hasPackExpansionBeforeEnd(Spec->template_arguments())) | ||||||
5973 | break; | ||||||
5974 | |||||||
5975 | for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I) | ||||||
5976 | MarkUsedTemplateParameters(Ctx, Spec->getArg(I), OnlyDeduced, Depth, | ||||||
5977 | Used); | ||||||
5978 | break; | ||||||
5979 | } | ||||||
5980 | |||||||
5981 | case Type::Complex: | ||||||
5982 | if (!OnlyDeduced) | ||||||
5983 | MarkUsedTemplateParameters(Ctx, | ||||||
5984 | cast<ComplexType>(T)->getElementType(), | ||||||
5985 | OnlyDeduced, Depth, Used); | ||||||
5986 | break; | ||||||
5987 | |||||||
5988 | case Type::Atomic: | ||||||
5989 | if (!OnlyDeduced) | ||||||
5990 | MarkUsedTemplateParameters(Ctx, | ||||||
5991 | cast<AtomicType>(T)->getValueType(), | ||||||
5992 | OnlyDeduced, Depth, Used); | ||||||
5993 | break; | ||||||
5994 | |||||||
5995 | case Type::DependentName: | ||||||
5996 | if (!OnlyDeduced) | ||||||
5997 | MarkUsedTemplateParameters(Ctx, | ||||||
5998 | cast<DependentNameType>(T)->getQualifier(), | ||||||
5999 | OnlyDeduced, Depth, Used); | ||||||
6000 | break; | ||||||
6001 | |||||||
6002 | case Type::DependentTemplateSpecialization: { | ||||||
6003 | // C++14 [temp.deduct.type]p5: | ||||||
6004 | // The non-deduced contexts are: | ||||||
6005 | // -- The nested-name-specifier of a type that was specified using a | ||||||
6006 | // qualified-id | ||||||
6007 | // | ||||||
6008 | // C++14 [temp.deduct.type]p6: | ||||||
6009 | // When a type name is specified in a way that includes a non-deduced | ||||||
6010 | // context, all of the types that comprise that type name are also | ||||||
6011 | // non-deduced. | ||||||
6012 | if (OnlyDeduced) | ||||||
6013 | break; | ||||||
6014 | |||||||
6015 | const DependentTemplateSpecializationType *Spec | ||||||
6016 | = cast<DependentTemplateSpecializationType>(T); | ||||||
6017 | |||||||
6018 | MarkUsedTemplateParameters(Ctx, Spec->getQualifier(), | ||||||
6019 | OnlyDeduced, Depth, Used); | ||||||
6020 | |||||||
6021 | for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I) | ||||||
6022 | MarkUsedTemplateParameters(Ctx, Spec->getArg(I), OnlyDeduced, Depth, | ||||||
6023 | Used); | ||||||
6024 | break; | ||||||
6025 | } | ||||||
6026 | |||||||
6027 | case Type::TypeOf: | ||||||
6028 | if (!OnlyDeduced) | ||||||
6029 | MarkUsedTemplateParameters(Ctx, | ||||||
6030 | cast<TypeOfType>(T)->getUnderlyingType(), | ||||||
6031 | OnlyDeduced, Depth, Used); | ||||||
6032 | break; | ||||||
6033 | |||||||
6034 | case Type::TypeOfExpr: | ||||||
6035 | if (!OnlyDeduced) | ||||||
6036 | MarkUsedTemplateParameters(Ctx, | ||||||
6037 | cast<TypeOfExprType>(T)->getUnderlyingExpr(), | ||||||
6038 | OnlyDeduced, Depth, Used); | ||||||
6039 | break; | ||||||
6040 | |||||||
6041 | case Type::Decltype: | ||||||
6042 | if (!OnlyDeduced) | ||||||
6043 | MarkUsedTemplateParameters(Ctx, | ||||||
6044 | cast<DecltypeType>(T)->getUnderlyingExpr(), | ||||||
6045 | OnlyDeduced, Depth, Used); | ||||||
6046 | break; | ||||||
6047 | |||||||
6048 | case Type::UnaryTransform: | ||||||
6049 | if (!OnlyDeduced) | ||||||
6050 | MarkUsedTemplateParameters(Ctx, | ||||||
6051 | cast<UnaryTransformType>(T)->getUnderlyingType(), | ||||||
6052 | OnlyDeduced, Depth, Used); | ||||||
6053 | break; | ||||||
6054 | |||||||
6055 | case Type::PackExpansion: | ||||||
6056 | MarkUsedTemplateParameters(Ctx, | ||||||
6057 | cast<PackExpansionType>(T)->getPattern(), | ||||||
6058 | OnlyDeduced, Depth, Used); | ||||||
6059 | break; | ||||||
6060 | |||||||
6061 | case Type::Auto: | ||||||
6062 | case Type::DeducedTemplateSpecialization: | ||||||
6063 | MarkUsedTemplateParameters(Ctx, | ||||||
6064 | cast<DeducedType>(T)->getDeducedType(), | ||||||
6065 | OnlyDeduced, Depth, Used); | ||||||
6066 | break; | ||||||
6067 | case Type::DependentExtInt: | ||||||
6068 | MarkUsedTemplateParameters(Ctx, | ||||||
6069 | cast<DependentExtIntType>(T)->getNumBitsExpr(), | ||||||
6070 | OnlyDeduced, Depth, Used); | ||||||
6071 | break; | ||||||
6072 | |||||||
6073 | // None of these types have any template parameters in them. | ||||||
6074 | case Type::Builtin: | ||||||
6075 | case Type::VariableArray: | ||||||
6076 | case Type::FunctionNoProto: | ||||||
6077 | case Type::Record: | ||||||
6078 | case Type::Enum: | ||||||
6079 | case Type::ObjCInterface: | ||||||
6080 | case Type::ObjCObject: | ||||||
6081 | case Type::ObjCObjectPointer: | ||||||
6082 | case Type::UnresolvedUsing: | ||||||
6083 | case Type::Pipe: | ||||||
6084 | case Type::ExtInt: | ||||||
6085 | #define TYPE(Class, Base) | ||||||
6086 | #define ABSTRACT_TYPE(Class, Base) | ||||||
6087 | #define DEPENDENT_TYPE(Class, Base) | ||||||
6088 | #define NON_CANONICAL_TYPE(Class, Base) case Type::Class: | ||||||
6089 | #include "clang/AST/TypeNodes.inc" | ||||||
6090 | break; | ||||||
6091 | } | ||||||
6092 | } | ||||||
6093 | |||||||
6094 | /// Mark the template parameters that are used by this | ||||||
6095 | /// template argument. | ||||||
6096 | static void | ||||||
6097 | MarkUsedTemplateParameters(ASTContext &Ctx, | ||||||
6098 | const TemplateArgument &TemplateArg, | ||||||
6099 | bool OnlyDeduced, | ||||||
6100 | unsigned Depth, | ||||||
6101 | llvm::SmallBitVector &Used) { | ||||||
6102 | switch (TemplateArg.getKind()) { | ||||||
6103 | case TemplateArgument::Null: | ||||||
6104 | case TemplateArgument::Integral: | ||||||
6105 | case TemplateArgument::Declaration: | ||||||
6106 | break; | ||||||
6107 | |||||||
6108 | case TemplateArgument::NullPtr: | ||||||
6109 | MarkUsedTemplateParameters(Ctx, TemplateArg.getNullPtrType(), OnlyDeduced, | ||||||
6110 | Depth, Used); | ||||||
6111 | break; | ||||||
6112 | |||||||
6113 | case TemplateArgument::Type: | ||||||
6114 | MarkUsedTemplateParameters(Ctx, TemplateArg.getAsType(), OnlyDeduced, | ||||||
6115 | Depth, Used); | ||||||
6116 | break; | ||||||
6117 | |||||||
6118 | case TemplateArgument::Template: | ||||||
6119 | case TemplateArgument::TemplateExpansion: | ||||||
6120 | MarkUsedTemplateParameters(Ctx, | ||||||
6121 | TemplateArg.getAsTemplateOrTemplatePattern(), | ||||||
6122 | OnlyDeduced, Depth, Used); | ||||||
6123 | break; | ||||||
6124 | |||||||
6125 | case TemplateArgument::Expression: | ||||||
6126 | MarkUsedTemplateParameters(Ctx, TemplateArg.getAsExpr(), OnlyDeduced, | ||||||
6127 | Depth, Used); | ||||||
6128 | break; | ||||||
6129 | |||||||
6130 | case TemplateArgument::Pack: | ||||||
6131 | for (const auto &P : TemplateArg.pack_elements()) | ||||||
6132 | MarkUsedTemplateParameters(Ctx, P, OnlyDeduced, Depth, Used); | ||||||
6133 | break; | ||||||
6134 | } | ||||||
6135 | } | ||||||
6136 | |||||||
6137 | /// Mark which template parameters are used in a given expression. | ||||||
6138 | /// | ||||||
6139 | /// \param E the expression from which template parameters will be deduced. | ||||||
6140 | /// | ||||||
6141 | /// \param Used a bit vector whose elements will be set to \c true | ||||||
6142 | /// to indicate when the corresponding template parameter will be | ||||||
6143 | /// deduced. | ||||||
6144 | void | ||||||
6145 | Sema::MarkUsedTemplateParameters(const Expr *E, bool OnlyDeduced, | ||||||
6146 | unsigned Depth, | ||||||
6147 | llvm::SmallBitVector &Used) { | ||||||
6148 | ::MarkUsedTemplateParameters(Context, E, OnlyDeduced, Depth, Used); | ||||||
6149 | } | ||||||
6150 | |||||||
6151 | /// Mark which template parameters can be deduced from a given | ||||||
6152 | /// template argument list. | ||||||
6153 | /// | ||||||
6154 | /// \param TemplateArgs the template argument list from which template | ||||||
6155 | /// parameters will be deduced. | ||||||
6156 | /// | ||||||
6157 | /// \param Used a bit vector whose elements will be set to \c true | ||||||
6158 | /// to indicate when the corresponding template parameter will be | ||||||
6159 | /// deduced. | ||||||
6160 | void | ||||||
6161 | Sema::MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, | ||||||
6162 | bool OnlyDeduced, unsigned Depth, | ||||||
6163 | llvm::SmallBitVector &Used) { | ||||||
6164 | // C++0x [temp.deduct.type]p9: | ||||||
6165 | // If the template argument list of P contains a pack expansion that is not | ||||||
6166 | // the last template argument, the entire template argument list is a | ||||||
6167 | // non-deduced context. | ||||||
6168 | if (OnlyDeduced && | ||||||
6169 | hasPackExpansionBeforeEnd(TemplateArgs.asArray())) | ||||||
6170 | return; | ||||||
6171 | |||||||
6172 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | ||||||
6173 | ::MarkUsedTemplateParameters(Context, TemplateArgs[I], OnlyDeduced, | ||||||
6174 | Depth, Used); | ||||||
6175 | } | ||||||
6176 | |||||||
6177 | /// Marks all of the template parameters that will be deduced by a | ||||||
6178 | /// call to the given function template. | ||||||
6179 | void Sema::MarkDeducedTemplateParameters( | ||||||
6180 | ASTContext &Ctx, const FunctionTemplateDecl *FunctionTemplate, | ||||||
6181 | llvm::SmallBitVector &Deduced) { | ||||||
6182 | TemplateParameterList *TemplateParams | ||||||
6183 | = FunctionTemplate->getTemplateParameters(); | ||||||
6184 | Deduced.clear(); | ||||||
6185 | Deduced.resize(TemplateParams->size()); | ||||||
6186 | |||||||
6187 | FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); | ||||||
6188 | for (unsigned I = 0, N = Function->getNumParams(); I != N; ++I) | ||||||
6189 | ::MarkUsedTemplateParameters(Ctx, Function->getParamDecl(I)->getType(), | ||||||
6190 | true, TemplateParams->getDepth(), Deduced); | ||||||
6191 | } | ||||||
6192 | |||||||
6193 | bool hasDeducibleTemplateParameters(Sema &S, | ||||||
6194 | FunctionTemplateDecl *FunctionTemplate, | ||||||
6195 | QualType T) { | ||||||
6196 | if (!T->isDependentType()) | ||||||
6197 | return false; | ||||||
6198 | |||||||
6199 | TemplateParameterList *TemplateParams | ||||||
6200 | = FunctionTemplate->getTemplateParameters(); | ||||||
6201 | llvm::SmallBitVector Deduced(TemplateParams->size()); | ||||||
6202 | ::MarkUsedTemplateParameters(S.Context, T, true, TemplateParams->getDepth(), | ||||||
6203 | Deduced); | ||||||
6204 | |||||||
6205 | return Deduced.any(); | ||||||
6206 | } |
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")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 282, __PRETTY_FUNCTION__)); |
283 | Mask = (Mask & ~CVRMask) | mask; |
284 | } |
285 | void removeCVRQualifiers(unsigned mask) { |
286 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 286, __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")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 293, __PRETTY_FUNCTION__)); |
294 | Mask |= mask; |
295 | } |
296 | void addCVRUQualifiers(unsigned mask) { |
297 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 297, __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)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 315, __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)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 343, __PRETTY_FUNCTION__)); |
344 | assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 344, __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())((Addr == LangAS::Default || hasTargetSpecificAddressSpace()) ? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 373, __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)(((unsigned)space <= MaxAddressSpace) ? static_cast<void > (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 382, __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)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 388, __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")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 397, __PRETTY_FUNCTION__)); |
398 | Mask = (Mask & ~FastMask) | mask; |
399 | } |
400 | void removeFastQualifiers(unsigned mask) { |
401 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 401, __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")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 408, __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() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 463, __PRETTY_FUNCTION__)) |
463 | !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 463, __PRETTY_FUNCTION__)); |
464 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 465, __PRETTY_FUNCTION__)) |
465 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 465, __PRETTY_FUNCTION__)); |
466 | assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 467, __PRETTY_FUNCTION__)) |
467 | !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 467, __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 | // Consider pointer size address spaces to be equivalent to default. |
490 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && |
491 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)); |
492 | } |
493 | |
494 | /// Returns true if the address space in these qualifiers is equal to or |
495 | /// a superset of the address space in the argument qualifiers. |
496 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
497 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
498 | } |
499 | |
500 | /// Determines if these qualifiers compatibly include another set. |
501 | /// Generally this answers the question of whether an object with the other |
502 | /// qualifiers can be safely used as an object with these qualifiers. |
503 | bool compatiblyIncludes(Qualifiers other) const { |
504 | return isAddressSpaceSupersetOf(other) && |
505 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
506 | // be changed. |
507 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
508 | !other.hasObjCGCAttr()) && |
509 | // ObjC lifetime qualifiers must match exactly. |
510 | getObjCLifetime() == other.getObjCLifetime() && |
511 | // CVR qualifiers may subset. |
512 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
513 | // U qualifier may superset. |
514 | (!other.hasUnaligned() || hasUnaligned()); |
515 | } |
516 | |
517 | /// Determines if these qualifiers compatibly include another set of |
518 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
519 | /// |
520 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
521 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
522 | /// including set also contains the 'const' qualifier, or both are non-__weak |
523 | /// and one is None (which can only happen in non-ARC modes). |
524 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
525 | if (getObjCLifetime() == other.getObjCLifetime()) |
526 | return true; |
527 | |
528 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
529 | return false; |
530 | |
531 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
532 | return true; |
533 | |
534 | return hasConst(); |
535 | } |
536 | |
537 | /// Determine whether this set of qualifiers is a strict superset of |
538 | /// another set of qualifiers, not considering qualifier compatibility. |
539 | bool isStrictSupersetOf(Qualifiers Other) const; |
540 | |
541 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
542 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
543 | |
544 | explicit operator bool() const { return hasQualifiers(); } |
545 | |
546 | Qualifiers &operator+=(Qualifiers R) { |
547 | addQualifiers(R); |
548 | return *this; |
549 | } |
550 | |
551 | // Union two qualifier sets. If an enumerated qualifier appears |
552 | // in both sets, use the one from the right. |
553 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
554 | L += R; |
555 | return L; |
556 | } |
557 | |
558 | Qualifiers &operator-=(Qualifiers R) { |
559 | removeQualifiers(R); |
560 | return *this; |
561 | } |
562 | |
563 | /// Compute the difference between two qualifier sets. |
564 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
565 | L -= R; |
566 | return L; |
567 | } |
568 | |
569 | std::string getAsString() const; |
570 | std::string getAsString(const PrintingPolicy &Policy) const; |
571 | |
572 | static std::string getAddrSpaceAsString(LangAS AS); |
573 | |
574 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
575 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
576 | bool appendSpaceIfNonEmpty = false) const; |
577 | |
578 | void Profile(llvm::FoldingSetNodeID &ID) const { |
579 | ID.AddInteger(Mask); |
580 | } |
581 | |
582 | private: |
583 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
584 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
585 | uint32_t Mask = 0; |
586 | |
587 | static const uint32_t UMask = 0x8; |
588 | static const uint32_t UShift = 3; |
589 | static const uint32_t GCAttrMask = 0x30; |
590 | static const uint32_t GCAttrShift = 4; |
591 | static const uint32_t LifetimeMask = 0x1C0; |
592 | static const uint32_t LifetimeShift = 6; |
593 | static const uint32_t AddressSpaceMask = |
594 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
595 | static const uint32_t AddressSpaceShift = 9; |
596 | }; |
597 | |
598 | /// A std::pair-like structure for storing a qualified type split |
599 | /// into its local qualifiers and its locally-unqualified type. |
600 | struct SplitQualType { |
601 | /// The locally-unqualified type. |
602 | const Type *Ty = nullptr; |
603 | |
604 | /// The local qualifiers. |
605 | Qualifiers Quals; |
606 | |
607 | SplitQualType() = default; |
608 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
609 | |
610 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
611 | |
612 | // Make std::tie work. |
613 | std::pair<const Type *,Qualifiers> asPair() const { |
614 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
615 | } |
616 | |
617 | friend bool operator==(SplitQualType a, SplitQualType b) { |
618 | return a.Ty == b.Ty && a.Quals == b.Quals; |
619 | } |
620 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
621 | return a.Ty != b.Ty || a.Quals != b.Quals; |
622 | } |
623 | }; |
624 | |
625 | /// The kind of type we are substituting Objective-C type arguments into. |
626 | /// |
627 | /// The kind of substitution affects the replacement of type parameters when |
628 | /// no concrete type information is provided, e.g., when dealing with an |
629 | /// unspecialized type. |
630 | enum class ObjCSubstitutionContext { |
631 | /// An ordinary type. |
632 | Ordinary, |
633 | |
634 | /// The result type of a method or function. |
635 | Result, |
636 | |
637 | /// The parameter type of a method or function. |
638 | Parameter, |
639 | |
640 | /// The type of a property. |
641 | Property, |
642 | |
643 | /// The superclass of a type. |
644 | Superclass, |
645 | }; |
646 | |
647 | /// A (possibly-)qualified type. |
648 | /// |
649 | /// For efficiency, we don't store CV-qualified types as nodes on their |
650 | /// own: instead each reference to a type stores the qualifiers. This |
651 | /// greatly reduces the number of nodes we need to allocate for types (for |
652 | /// example we only need one for 'int', 'const int', 'volatile int', |
653 | /// 'const volatile int', etc). |
654 | /// |
655 | /// As an added efficiency bonus, instead of making this a pair, we |
656 | /// just store the two bits we care about in the low bits of the |
657 | /// pointer. To handle the packing/unpacking, we make QualType be a |
658 | /// simple wrapper class that acts like a smart pointer. A third bit |
659 | /// indicates whether there are extended qualifiers present, in which |
660 | /// case the pointer points to a special structure. |
661 | class QualType { |
662 | friend class QualifierCollector; |
663 | |
664 | // Thankfully, these are efficiently composable. |
665 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
666 | Qualifiers::FastWidth> Value; |
667 | |
668 | const ExtQuals *getExtQualsUnsafe() const { |
669 | return Value.getPointer().get<const ExtQuals*>(); |
670 | } |
671 | |
672 | const Type *getTypePtrUnsafe() const { |
673 | return Value.getPointer().get<const Type*>(); |
674 | } |
675 | |
676 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
677 | assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer") ? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 677, __PRETTY_FUNCTION__)); |
678 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
679 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
680 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
681 | } |
682 | |
683 | public: |
684 | QualType() = default; |
685 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
686 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
687 | |
688 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
689 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
690 | |
691 | /// Retrieves a pointer to the underlying (unqualified) type. |
692 | /// |
693 | /// This function requires that the type not be NULL. If the type might be |
694 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
695 | const Type *getTypePtr() const; |
696 | |
697 | const Type *getTypePtrOrNull() const; |
698 | |
699 | /// Retrieves a pointer to the name of the base type. |
700 | const IdentifierInfo *getBaseTypeIdentifier() const; |
701 | |
702 | /// Divides a QualType into its unqualified type and a set of local |
703 | /// qualifiers. |
704 | SplitQualType split() const; |
705 | |
706 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
707 | |
708 | static QualType getFromOpaquePtr(const void *Ptr) { |
709 | QualType T; |
710 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
711 | return T; |
712 | } |
713 | |
714 | const Type &operator*() const { |
715 | return *getTypePtr(); |
716 | } |
717 | |
718 | const Type *operator->() const { |
719 | return getTypePtr(); |
720 | } |
721 | |
722 | bool isCanonical() const; |
723 | bool isCanonicalAsParam() const; |
724 | |
725 | /// Return true if this QualType doesn't point to a type yet. |
726 | bool isNull() const { |
727 | return Value.getPointer().isNull(); |
728 | } |
729 | |
730 | /// Determine whether this particular QualType instance has the |
731 | /// "const" qualifier set, without looking through typedefs that may have |
732 | /// added "const" at a different level. |
733 | bool isLocalConstQualified() const { |
734 | return (getLocalFastQualifiers() & Qualifiers::Const); |
735 | } |
736 | |
737 | /// Determine whether this type is const-qualified. |
738 | bool isConstQualified() const; |
739 | |
740 | /// Determine whether this particular QualType instance has the |
741 | /// "restrict" qualifier set, without looking through typedefs that may have |
742 | /// added "restrict" at a different level. |
743 | bool isLocalRestrictQualified() const { |
744 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
745 | } |
746 | |
747 | /// Determine whether this type is restrict-qualified. |
748 | bool isRestrictQualified() const; |
749 | |
750 | /// Determine whether this particular QualType instance has the |
751 | /// "volatile" qualifier set, without looking through typedefs that may have |
752 | /// added "volatile" at a different level. |
753 | bool isLocalVolatileQualified() const { |
754 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
755 | } |
756 | |
757 | /// Determine whether this type is volatile-qualified. |
758 | bool isVolatileQualified() const; |
759 | |
760 | /// Determine whether this particular QualType instance has any |
761 | /// qualifiers, without looking through any typedefs that might add |
762 | /// qualifiers at a different level. |
763 | bool hasLocalQualifiers() const { |
764 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
765 | } |
766 | |
767 | /// Determine whether this type has any qualifiers. |
768 | bool hasQualifiers() const; |
769 | |
770 | /// Determine whether this particular QualType instance has any |
771 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
772 | /// instance. |
773 | bool hasLocalNonFastQualifiers() const { |
774 | return Value.getPointer().is<const ExtQuals*>(); |
775 | } |
776 | |
777 | /// Retrieve the set of qualifiers local to this particular QualType |
778 | /// instance, not including any qualifiers acquired through typedefs or |
779 | /// other sugar. |
780 | Qualifiers getLocalQualifiers() const; |
781 | |
782 | /// Retrieve the set of qualifiers applied to this type. |
783 | Qualifiers getQualifiers() const; |
784 | |
785 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
786 | /// local to this particular QualType instance, not including any qualifiers |
787 | /// acquired through typedefs or other sugar. |
788 | unsigned getLocalCVRQualifiers() const { |
789 | return getLocalFastQualifiers(); |
790 | } |
791 | |
792 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
793 | /// applied to this type. |
794 | unsigned getCVRQualifiers() const; |
795 | |
796 | bool isConstant(const ASTContext& Ctx) const { |
797 | return QualType::isConstant(*this, Ctx); |
798 | } |
799 | |
800 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
801 | bool isPODType(const ASTContext &Context) const; |
802 | |
803 | /// Return true if this is a POD type according to the rules of the C++98 |
804 | /// standard, regardless of the current compilation's language. |
805 | bool isCXX98PODType(const ASTContext &Context) const; |
806 | |
807 | /// Return true if this is a POD type according to the more relaxed rules |
808 | /// of the C++11 standard, regardless of the current compilation's language. |
809 | /// (C++0x [basic.types]p9). Note that, unlike |
810 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
811 | bool isCXX11PODType(const ASTContext &Context) const; |
812 | |
813 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
814 | bool isTrivialType(const ASTContext &Context) const; |
815 | |
816 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
817 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
818 | |
819 | |
820 | /// Returns true if it is a class and it might be dynamic. |
821 | bool mayBeDynamicClass() const; |
822 | |
823 | /// Returns true if it is not a class or if the class might not be dynamic. |
824 | bool mayBeNotDynamicClass() const; |
825 | |
826 | // Don't promise in the API that anything besides 'const' can be |
827 | // easily added. |
828 | |
829 | /// Add the `const` type qualifier to this QualType. |
830 | void addConst() { |
831 | addFastQualifiers(Qualifiers::Const); |
832 | } |
833 | QualType withConst() const { |
834 | return withFastQualifiers(Qualifiers::Const); |
835 | } |
836 | |
837 | /// Add the `volatile` type qualifier to this QualType. |
838 | void addVolatile() { |
839 | addFastQualifiers(Qualifiers::Volatile); |
840 | } |
841 | QualType withVolatile() const { |
842 | return withFastQualifiers(Qualifiers::Volatile); |
843 | } |
844 | |
845 | /// Add the `restrict` qualifier to this QualType. |
846 | void addRestrict() { |
847 | addFastQualifiers(Qualifiers::Restrict); |
848 | } |
849 | QualType withRestrict() const { |
850 | return withFastQualifiers(Qualifiers::Restrict); |
851 | } |
852 | |
853 | QualType withCVRQualifiers(unsigned CVR) const { |
854 | return withFastQualifiers(CVR); |
855 | } |
856 | |
857 | void addFastQualifiers(unsigned TQs) { |
858 | assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 859, __PRETTY_FUNCTION__)) |
859 | && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 859, __PRETTY_FUNCTION__)); |
860 | Value.setInt(Value.getInt() | TQs); |
861 | } |
862 | |
863 | void removeLocalConst(); |
864 | void removeLocalVolatile(); |
865 | void removeLocalRestrict(); |
866 | void removeLocalCVRQualifiers(unsigned Mask); |
867 | |
868 | void removeLocalFastQualifiers() { Value.setInt(0); } |
869 | void removeLocalFastQualifiers(unsigned Mask) { |
870 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 870, __PRETTY_FUNCTION__)); |
871 | Value.setInt(Value.getInt() & ~Mask); |
872 | } |
873 | |
874 | // Creates a type with the given qualifiers in addition to any |
875 | // qualifiers already on this type. |
876 | QualType withFastQualifiers(unsigned TQs) const { |
877 | QualType T = *this; |
878 | T.addFastQualifiers(TQs); |
879 | return T; |
880 | } |
881 | |
882 | // Creates a type with exactly the given fast qualifiers, removing |
883 | // any existing fast qualifiers. |
884 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
885 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
886 | } |
887 | |
888 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
889 | QualType withoutLocalFastQualifiers() const { |
890 | QualType T = *this; |
891 | T.removeLocalFastQualifiers(); |
892 | return T; |
893 | } |
894 | |
895 | QualType getCanonicalType() const; |
896 | |
897 | /// Return this type with all of the instance-specific qualifiers |
898 | /// removed, but without removing any qualifiers that may have been applied |
899 | /// through typedefs. |
900 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
901 | |
902 | /// Retrieve the unqualified variant of the given type, |
903 | /// removing as little sugar as possible. |
904 | /// |
905 | /// This routine looks through various kinds of sugar to find the |
906 | /// least-desugared type that is unqualified. For example, given: |
907 | /// |
908 | /// \code |
909 | /// typedef int Integer; |
910 | /// typedef const Integer CInteger; |
911 | /// typedef CInteger DifferenceType; |
912 | /// \endcode |
913 | /// |
914 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
915 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
916 | /// |
917 | /// The resulting type might still be qualified if it's sugar for an array |
918 | /// type. To strip qualifiers even from within a sugared array type, use |
919 | /// ASTContext::getUnqualifiedArrayType. |
920 | inline QualType getUnqualifiedType() const; |
921 | |
922 | /// Retrieve the unqualified variant of the given type, removing as little |
923 | /// sugar as possible. |
924 | /// |
925 | /// Like getUnqualifiedType(), but also returns the set of |
926 | /// qualifiers that were built up. |
927 | /// |
928 | /// The resulting type might still be qualified if it's sugar for an array |
929 | /// type. To strip qualifiers even from within a sugared array type, use |
930 | /// ASTContext::getUnqualifiedArrayType. |
931 | inline SplitQualType getSplitUnqualifiedType() const; |
932 | |
933 | /// Determine whether this type is more qualified than the other |
934 | /// given type, requiring exact equality for non-CVR qualifiers. |
935 | bool isMoreQualifiedThan(QualType Other) const; |
936 | |
937 | /// Determine whether this type is at least as qualified as the other |
938 | /// given type, requiring exact equality for non-CVR qualifiers. |
939 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
940 | |
941 | QualType getNonReferenceType() const; |
942 | |
943 | /// Determine the type of a (typically non-lvalue) expression with the |
944 | /// specified result type. |
945 | /// |
946 | /// This routine should be used for expressions for which the return type is |
947 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
948 | /// an lvalue. It removes a top-level reference (since there are no |
949 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
950 | /// from non-class types (in C++) or all types (in C). |
951 | QualType getNonLValueExprType(const ASTContext &Context) const; |
952 | |
953 | /// Remove an outer pack expansion type (if any) from this type. Used as part |
954 | /// of converting the type of a declaration to the type of an expression that |
955 | /// references that expression. It's meaningless for an expression to have a |
956 | /// pack expansion type. |
957 | QualType getNonPackExpansionType() const; |
958 | |
959 | /// Return the specified type with any "sugar" removed from |
960 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
961 | /// the type is already concrete, it returns it unmodified. This is similar |
962 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
963 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
964 | /// concrete. |
965 | /// |
966 | /// Qualifiers are left in place. |
967 | QualType getDesugaredType(const ASTContext &Context) const { |
968 | return getDesugaredType(*this, Context); |
969 | } |
970 | |
971 | SplitQualType getSplitDesugaredType() const { |
972 | return getSplitDesugaredType(*this); |
973 | } |
974 | |
975 | /// Return the specified type with one level of "sugar" removed from |
976 | /// the type. |
977 | /// |
978 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
979 | /// of the type is already concrete, it returns it unmodified. |
980 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
981 | return getSingleStepDesugaredTypeImpl(*this, Context); |
982 | } |
983 | |
984 | /// Returns the specified type after dropping any |
985 | /// outer-level parentheses. |
986 | QualType IgnoreParens() const { |
987 | if (isa<ParenType>(*this)) |
988 | return QualType::IgnoreParens(*this); |
989 | return *this; |
990 | } |
991 | |
992 | /// Indicate whether the specified types and qualifiers are identical. |
993 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
994 | return LHS.Value == RHS.Value; |
995 | } |
996 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
997 | return LHS.Value != RHS.Value; |
998 | } |
999 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
1000 | return LHS.Value < RHS.Value; |
1001 | } |
1002 | |
1003 | static std::string getAsString(SplitQualType split, |
1004 | const PrintingPolicy &Policy) { |
1005 | return getAsString(split.Ty, split.Quals, Policy); |
1006 | } |
1007 | static std::string getAsString(const Type *ty, Qualifiers qs, |
1008 | const PrintingPolicy &Policy); |
1009 | |
1010 | std::string getAsString() const; |
1011 | std::string getAsString(const PrintingPolicy &Policy) const; |
1012 | |
1013 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
1014 | const Twine &PlaceHolder = Twine(), |
1015 | unsigned Indentation = 0) const; |
1016 | |
1017 | static void print(SplitQualType split, raw_ostream &OS, |
1018 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
1019 | unsigned Indentation = 0) { |
1020 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
1021 | } |
1022 | |
1023 | static void print(const Type *ty, Qualifiers qs, |
1024 | raw_ostream &OS, const PrintingPolicy &policy, |
1025 | const Twine &PlaceHolder, |
1026 | unsigned Indentation = 0); |
1027 | |
1028 | void getAsStringInternal(std::string &Str, |
1029 | const PrintingPolicy &Policy) const; |
1030 | |
1031 | static void getAsStringInternal(SplitQualType split, std::string &out, |
1032 | const PrintingPolicy &policy) { |
1033 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
1034 | } |
1035 | |
1036 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
1037 | std::string &out, |
1038 | const PrintingPolicy &policy); |
1039 | |
1040 | class StreamedQualTypeHelper { |
1041 | const QualType &T; |
1042 | const PrintingPolicy &Policy; |
1043 | const Twine &PlaceHolder; |
1044 | unsigned Indentation; |
1045 | |
1046 | public: |
1047 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
1048 | const Twine &PlaceHolder, unsigned Indentation) |
1049 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
1050 | Indentation(Indentation) {} |
1051 | |
1052 | friend raw_ostream &operator<<(raw_ostream &OS, |
1053 | const StreamedQualTypeHelper &SQT) { |
1054 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
1055 | return OS; |
1056 | } |
1057 | }; |
1058 | |
1059 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
1060 | const Twine &PlaceHolder = Twine(), |
1061 | unsigned Indentation = 0) const { |
1062 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
1063 | } |
1064 | |
1065 | void dump(const char *s) const; |
1066 | void dump() const; |
1067 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
1068 | |
1069 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1070 | ID.AddPointer(getAsOpaquePtr()); |
1071 | } |
1072 | |
1073 | /// Check if this type has any address space qualifier. |
1074 | inline bool hasAddressSpace() const; |
1075 | |
1076 | /// Return the address space of this type. |
1077 | inline LangAS getAddressSpace() const; |
1078 | |
1079 | /// Returns true if address space qualifiers overlap with T address space |
1080 | /// qualifiers. |
1081 | /// OpenCL C defines conversion rules for pointers to different address spaces |
1082 | /// and notion of overlapping address spaces. |
1083 | /// CL1.1 or CL1.2: |
1084 | /// address spaces overlap iff they are they same. |
1085 | /// OpenCL C v2.0 s6.5.5 adds: |
1086 | /// __generic overlaps with any address space except for __constant. |
1087 | bool isAddressSpaceOverlapping(QualType T) const { |
1088 | Qualifiers Q = getQualifiers(); |
1089 | Qualifiers TQ = T.getQualifiers(); |
1090 | // Address spaces overlap if at least one of them is a superset of another |
1091 | return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q); |
1092 | } |
1093 | |
1094 | /// Returns gc attribute of this type. |
1095 | inline Qualifiers::GC getObjCGCAttr() const; |
1096 | |
1097 | /// true when Type is objc's weak. |
1098 | bool isObjCGCWeak() const { |
1099 | return getObjCGCAttr() == Qualifiers::Weak; |
1100 | } |
1101 | |
1102 | /// true when Type is objc's strong. |
1103 | bool isObjCGCStrong() const { |
1104 | return getObjCGCAttr() == Qualifiers::Strong; |
1105 | } |
1106 | |
1107 | /// Returns lifetime attribute of this type. |
1108 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1109 | return getQualifiers().getObjCLifetime(); |
1110 | } |
1111 | |
1112 | bool hasNonTrivialObjCLifetime() const { |
1113 | return getQualifiers().hasNonTrivialObjCLifetime(); |
1114 | } |
1115 | |
1116 | bool hasStrongOrWeakObjCLifetime() const { |
1117 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
1118 | } |
1119 | |
1120 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
1121 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
1122 | |
1123 | enum PrimitiveDefaultInitializeKind { |
1124 | /// The type does not fall into any of the following categories. Note that |
1125 | /// this case is zero-valued so that values of this enum can be used as a |
1126 | /// boolean condition for non-triviality. |
1127 | PDIK_Trivial, |
1128 | |
1129 | /// The type is an Objective-C retainable pointer type that is qualified |
1130 | /// with the ARC __strong qualifier. |
1131 | PDIK_ARCStrong, |
1132 | |
1133 | /// The type is an Objective-C retainable pointer type that is qualified |
1134 | /// with the ARC __weak qualifier. |
1135 | PDIK_ARCWeak, |
1136 | |
1137 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
1138 | PDIK_Struct |
1139 | }; |
1140 | |
1141 | /// Functions to query basic properties of non-trivial C struct types. |
1142 | |
1143 | /// Check if this is a non-trivial type that would cause a C struct |
1144 | /// transitively containing this type to be non-trivial to default initialize |
1145 | /// and return the kind. |
1146 | PrimitiveDefaultInitializeKind |
1147 | isNonTrivialToPrimitiveDefaultInitialize() const; |
1148 | |
1149 | enum PrimitiveCopyKind { |
1150 | /// The type does not fall into any of the following categories. Note that |
1151 | /// this case is zero-valued so that values of this enum can be used as a |
1152 | /// boolean condition for non-triviality. |
1153 | PCK_Trivial, |
1154 | |
1155 | /// The type would be trivial except that it is volatile-qualified. Types |
1156 | /// that fall into one of the other non-trivial cases may additionally be |
1157 | /// volatile-qualified. |
1158 | PCK_VolatileTrivial, |
1159 | |
1160 | /// The type is an Objective-C retainable pointer type that is qualified |
1161 | /// with the ARC __strong qualifier. |
1162 | PCK_ARCStrong, |
1163 | |
1164 | /// The type is an Objective-C retainable pointer type that is qualified |
1165 | /// with the ARC __weak qualifier. |
1166 | PCK_ARCWeak, |
1167 | |
1168 | /// The type is a struct containing a field whose type is neither |
1169 | /// PCK_Trivial nor PCK_VolatileTrivial. |
1170 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
1171 | /// semantics are too complex to express here, in part because they depend |
1172 | /// on the exact constructor or assignment operator that is chosen by |
1173 | /// overload resolution to do the copy. |
1174 | PCK_Struct |
1175 | }; |
1176 | |
1177 | /// Check if this is a non-trivial type that would cause a C struct |
1178 | /// transitively containing this type to be non-trivial to copy and return the |
1179 | /// kind. |
1180 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
1181 | |
1182 | /// Check if this is a non-trivial type that would cause a C struct |
1183 | /// transitively containing this type to be non-trivial to destructively |
1184 | /// move and return the kind. Destructive move in this context is a C++-style |
1185 | /// move in which the source object is placed in a valid but unspecified state |
1186 | /// after it is moved, as opposed to a truly destructive move in which the |
1187 | /// source object is placed in an uninitialized state. |
1188 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
1189 | |
1190 | enum DestructionKind { |
1191 | DK_none, |
1192 | DK_cxx_destructor, |
1193 | DK_objc_strong_lifetime, |
1194 | DK_objc_weak_lifetime, |
1195 | DK_nontrivial_c_struct |
1196 | }; |
1197 | |
1198 | /// Returns a nonzero value if objects of this type require |
1199 | /// non-trivial work to clean up after. Non-zero because it's |
1200 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
1201 | /// something require destruction. |
1202 | DestructionKind isDestructedType() const { |
1203 | return isDestructedTypeImpl(*this); |
1204 | } |
1205 | |
1206 | /// Check if this is or contains a C union that is non-trivial to |
1207 | /// default-initialize, which is a union that has a member that is non-trivial |
1208 | /// to default-initialize. If this returns true, |
1209 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
1210 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
1211 | |
1212 | /// Check if this is or contains a C union that is non-trivial to destruct, |
1213 | /// which is a union that has a member that is non-trivial to destruct. If |
1214 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
1215 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
1216 | |
1217 | /// Check if this is or contains a C union that is non-trivial to copy, which |
1218 | /// is a union that has a member that is non-trivial to copy. If this returns |
1219 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
1220 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
1221 | |
1222 | /// Determine whether expressions of the given type are forbidden |
1223 | /// from being lvalues in C. |
1224 | /// |
1225 | /// The expression types that are forbidden to be lvalues are: |
1226 | /// - 'void', but not qualified void |
1227 | /// - function types |
1228 | /// |
1229 | /// The exact rule here is C99 6.3.2.1: |
1230 | /// An lvalue is an expression with an object type or an incomplete |
1231 | /// type other than void. |
1232 | bool isCForbiddenLValueType() const; |
1233 | |
1234 | /// Substitute type arguments for the Objective-C type parameters used in the |
1235 | /// subject type. |
1236 | /// |
1237 | /// \param ctx ASTContext in which the type exists. |
1238 | /// |
1239 | /// \param typeArgs The type arguments that will be substituted for the |
1240 | /// Objective-C type parameters in the subject type, which are generally |
1241 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
1242 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
1243 | /// for the context. |
1244 | /// |
1245 | /// \param context The context in which the subject type was written. |
1246 | /// |
1247 | /// \returns the resulting type. |
1248 | QualType substObjCTypeArgs(ASTContext &ctx, |
1249 | ArrayRef<QualType> typeArgs, |
1250 | ObjCSubstitutionContext context) const; |
1251 | |
1252 | /// Substitute type arguments from an object type for the Objective-C type |
1253 | /// parameters used in the subject type. |
1254 | /// |
1255 | /// This operation combines the computation of type arguments for |
1256 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
1257 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
1258 | /// callers that need to perform a single substitution in isolation. |
1259 | /// |
1260 | /// \param objectType The type of the object whose member type we're |
1261 | /// substituting into. For example, this might be the receiver of a message |
1262 | /// or the base of a property access. |
1263 | /// |
1264 | /// \param dc The declaration context from which the subject type was |
1265 | /// retrieved, which indicates (for example) which type parameters should |
1266 | /// be substituted. |
1267 | /// |
1268 | /// \param context The context in which the subject type was written. |
1269 | /// |
1270 | /// \returns the subject type after replacing all of the Objective-C type |
1271 | /// parameters with their corresponding arguments. |
1272 | QualType substObjCMemberType(QualType objectType, |
1273 | const DeclContext *dc, |
1274 | ObjCSubstitutionContext context) const; |
1275 | |
1276 | /// Strip Objective-C "__kindof" types from the given type. |
1277 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
1278 | |
1279 | /// Remove all qualifiers including _Atomic. |
1280 | QualType getAtomicUnqualifiedType() const; |
1281 | |
1282 | private: |
1283 | // These methods are implemented in a separate translation unit; |
1284 | // "static"-ize them to avoid creating temporary QualTypes in the |
1285 | // caller. |
1286 | static bool isConstant(QualType T, const ASTContext& Ctx); |
1287 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
1288 | static SplitQualType getSplitDesugaredType(QualType T); |
1289 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
1290 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
1291 | const ASTContext &C); |
1292 | static QualType IgnoreParens(QualType T); |
1293 | static DestructionKind isDestructedTypeImpl(QualType type); |
1294 | |
1295 | /// Check if \param RD is or contains a non-trivial C union. |
1296 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
1297 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
1298 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
1299 | }; |
1300 | |
1301 | } // namespace clang |
1302 | |
1303 | namespace llvm { |
1304 | |
1305 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
1306 | /// to a specific Type class. |
1307 | template<> struct simplify_type< ::clang::QualType> { |
1308 | using SimpleType = const ::clang::Type *; |
1309 | |
1310 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
1311 | return Val.getTypePtr(); |
1312 | } |
1313 | }; |
1314 | |
1315 | // Teach SmallPtrSet that QualType is "basically a pointer". |
1316 | template<> |
1317 | struct PointerLikeTypeTraits<clang::QualType> { |
1318 | static inline void *getAsVoidPointer(clang::QualType P) { |
1319 | return P.getAsOpaquePtr(); |
1320 | } |
1321 | |
1322 | static inline clang::QualType getFromVoidPointer(void *P) { |
1323 | return clang::QualType::getFromOpaquePtr(P); |
1324 | } |
1325 | |
1326 | // Various qualifiers go in low bits. |
1327 | static constexpr int NumLowBitsAvailable = 0; |
1328 | }; |
1329 | |
1330 | } // namespace llvm |
1331 | |
1332 | namespace clang { |
1333 | |
1334 | /// Base class that is common to both the \c ExtQuals and \c Type |
1335 | /// classes, which allows \c QualType to access the common fields between the |
1336 | /// two. |
1337 | class ExtQualsTypeCommonBase { |
1338 | friend class ExtQuals; |
1339 | friend class QualType; |
1340 | friend class Type; |
1341 | |
1342 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
1343 | /// a self-referential pointer (for \c Type). |
1344 | /// |
1345 | /// This pointer allows an efficient mapping from a QualType to its |
1346 | /// underlying type pointer. |
1347 | const Type *const BaseType; |
1348 | |
1349 | /// The canonical type of this type. A QualType. |
1350 | QualType CanonicalType; |
1351 | |
1352 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
1353 | : BaseType(baseType), CanonicalType(canon) {} |
1354 | }; |
1355 | |
1356 | /// We can encode up to four bits in the low bits of a |
1357 | /// type pointer, but there are many more type qualifiers that we want |
1358 | /// to be able to apply to an arbitrary type. Therefore we have this |
1359 | /// struct, intended to be heap-allocated and used by QualType to |
1360 | /// store qualifiers. |
1361 | /// |
1362 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
1363 | /// in three low bits on the QualType pointer; a fourth bit records whether |
1364 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
1365 | /// Objective-C GC attributes) are much more rare. |
1366 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
1367 | // NOTE: changing the fast qualifiers should be straightforward as |
1368 | // long as you don't make 'const' non-fast. |
1369 | // 1. Qualifiers: |
1370 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
1371 | // Fast qualifiers must occupy the low-order bits. |
1372 | // b) Update Qualifiers::FastWidth and FastMask. |
1373 | // 2. QualType: |
1374 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
1375 | // b) Update remove{Volatile,Restrict}, defined near the end of |
1376 | // this header. |
1377 | // 3. ASTContext: |
1378 | // a) Update get{Volatile,Restrict}Type. |
1379 | |
1380 | /// The immutable set of qualifiers applied by this node. Always contains |
1381 | /// extended qualifiers. |
1382 | Qualifiers Quals; |
1383 | |
1384 | ExtQuals *this_() { return this; } |
1385 | |
1386 | public: |
1387 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
1388 | : ExtQualsTypeCommonBase(baseType, |
1389 | canon.isNull() ? QualType(this_(), 0) : canon), |
1390 | Quals(quals) { |
1391 | assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1392, __PRETTY_FUNCTION__)) |
1392 | && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1392, __PRETTY_FUNCTION__)); |
1393 | assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1394, __PRETTY_FUNCTION__)) |
1394 | && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1394, __PRETTY_FUNCTION__)); |
1395 | } |
1396 | |
1397 | Qualifiers getQualifiers() const { return Quals; } |
1398 | |
1399 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
1400 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
1401 | |
1402 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
1403 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1404 | return Quals.getObjCLifetime(); |
1405 | } |
1406 | |
1407 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
1408 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
1409 | |
1410 | const Type *getBaseType() const { return BaseType; } |
1411 | |
1412 | public: |
1413 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1414 | Profile(ID, getBaseType(), Quals); |
1415 | } |
1416 | |
1417 | static void Profile(llvm::FoldingSetNodeID &ID, |
1418 | const Type *BaseType, |
1419 | Qualifiers Quals) { |
1420 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1420, __PRETTY_FUNCTION__)); |
1421 | ID.AddPointer(BaseType); |
1422 | Quals.Profile(ID); |
1423 | } |
1424 | }; |
1425 | |
1426 | /// The kind of C++11 ref-qualifier associated with a function type. |
1427 | /// This determines whether a member function's "this" object can be an |
1428 | /// lvalue, rvalue, or neither. |
1429 | enum RefQualifierKind { |
1430 | /// No ref-qualifier was provided. |
1431 | RQ_None = 0, |
1432 | |
1433 | /// An lvalue ref-qualifier was provided (\c &). |
1434 | RQ_LValue, |
1435 | |
1436 | /// An rvalue ref-qualifier was provided (\c &&). |
1437 | RQ_RValue |
1438 | }; |
1439 | |
1440 | /// Which keyword(s) were used to create an AutoType. |
1441 | enum class AutoTypeKeyword { |
1442 | /// auto |
1443 | Auto, |
1444 | |
1445 | /// decltype(auto) |
1446 | DecltypeAuto, |
1447 | |
1448 | /// __auto_type (GNU extension) |
1449 | GNUAutoType |
1450 | }; |
1451 | |
1452 | /// The base class of the type hierarchy. |
1453 | /// |
1454 | /// A central concept with types is that each type always has a canonical |
1455 | /// type. A canonical type is the type with any typedef names stripped out |
1456 | /// of it or the types it references. For example, consider: |
1457 | /// |
1458 | /// typedef int foo; |
1459 | /// typedef foo* bar; |
1460 | /// 'int *' 'foo *' 'bar' |
1461 | /// |
1462 | /// There will be a Type object created for 'int'. Since int is canonical, its |
1463 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
1464 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
1465 | /// there is a PointerType that represents 'int*', which, like 'int', is |
1466 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
1467 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
1468 | /// is also 'int*'. |
1469 | /// |
1470 | /// Non-canonical types are useful for emitting diagnostics, without losing |
1471 | /// information about typedefs being used. Canonical types are useful for type |
1472 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
1473 | /// about whether something has a particular form (e.g. is a function type), |
1474 | /// because they implicitly, recursively, strip all typedefs out of a type. |
1475 | /// |
1476 | /// Types, once created, are immutable. |
1477 | /// |
1478 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
1479 | public: |
1480 | enum TypeClass { |
1481 | #define TYPE(Class, Base) Class, |
1482 | #define LAST_TYPE(Class) TypeLast = Class |
1483 | #define ABSTRACT_TYPE(Class, Base) |
1484 | #include "clang/AST/TypeNodes.inc" |
1485 | }; |
1486 | |
1487 | private: |
1488 | /// Bitfields required by the Type class. |
1489 | class TypeBitfields { |
1490 | friend class Type; |
1491 | template <class T> friend class TypePropertyCache; |
1492 | |
1493 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
1494 | unsigned TC : 8; |
1495 | |
1496 | /// Store information on the type dependency. |
1497 | unsigned Dependence : llvm::BitWidth<TypeDependence>; |
1498 | |
1499 | /// True if the cache (i.e. the bitfields here starting with |
1500 | /// 'Cache') is valid. |
1501 | mutable unsigned CacheValid : 1; |
1502 | |
1503 | /// Linkage of this type. |
1504 | mutable unsigned CachedLinkage : 3; |
1505 | |
1506 | /// Whether this type involves and local or unnamed types. |
1507 | mutable unsigned CachedLocalOrUnnamed : 1; |
1508 | |
1509 | /// Whether this type comes from an AST file. |
1510 | mutable unsigned FromAST : 1; |
1511 | |
1512 | bool isCacheValid() const { |
1513 | return CacheValid; |
1514 | } |
1515 | |
1516 | Linkage getLinkage() const { |
1517 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1517, __PRETTY_FUNCTION__)); |
1518 | return static_cast<Linkage>(CachedLinkage); |
1519 | } |
1520 | |
1521 | bool hasLocalOrUnnamedType() const { |
1522 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 1522, __PRETTY_FUNCTION__)); |
1523 | return CachedLocalOrUnnamed; |
1524 | } |
1525 | }; |
1526 | enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 }; |
1527 | |
1528 | protected: |
1529 | // These classes allow subclasses to somewhat cleanly pack bitfields |
1530 | // into Type. |
1531 | |
1532 | class ArrayTypeBitfields { |
1533 | friend class ArrayType; |
1534 | |
1535 | unsigned : NumTypeBits; |
1536 | |
1537 | /// CVR qualifiers from declarations like |
1538 | /// 'int X[static restrict 4]'. For function parameters only. |
1539 | unsigned IndexTypeQuals : 3; |
1540 | |
1541 | /// Storage class qualifiers from declarations like |
1542 | /// 'int X[static restrict 4]'. For function parameters only. |
1543 | /// Actually an ArrayType::ArraySizeModifier. |
1544 | unsigned SizeModifier : 3; |
1545 | }; |
1546 | |
1547 | class ConstantArrayTypeBitfields { |
1548 | friend class ConstantArrayType; |
1549 | |
1550 | unsigned : NumTypeBits + 3 + 3; |
1551 | |
1552 | /// Whether we have a stored size expression. |
1553 | unsigned HasStoredSizeExpr : 1; |
1554 | }; |
1555 | |
1556 | class BuiltinTypeBitfields { |
1557 | friend class BuiltinType; |
1558 | |
1559 | unsigned : NumTypeBits; |
1560 | |
1561 | /// The kind (BuiltinType::Kind) of builtin type this is. |
1562 | unsigned Kind : 8; |
1563 | }; |
1564 | |
1565 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
1566 | /// Only common bits are stored here. Additional uncommon bits are stored |
1567 | /// in a trailing object after FunctionProtoType. |
1568 | class FunctionTypeBitfields { |
1569 | friend class FunctionProtoType; |
1570 | friend class FunctionType; |
1571 | |
1572 | unsigned : NumTypeBits; |
1573 | |
1574 | /// Extra information which affects how the function is called, like |
1575 | /// regparm and the calling convention. |
1576 | unsigned ExtInfo : 13; |
1577 | |
1578 | /// The ref-qualifier associated with a \c FunctionProtoType. |
1579 | /// |
1580 | /// This is a value of type \c RefQualifierKind. |
1581 | unsigned RefQualifier : 2; |
1582 | |
1583 | /// Used only by FunctionProtoType, put here to pack with the |
1584 | /// other bitfields. |
1585 | /// The qualifiers are part of FunctionProtoType because... |
1586 | /// |
1587 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
1588 | /// cv-qualifier-seq, [...], are part of the function type. |
1589 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
1590 | /// Whether this function has extended Qualifiers. |
1591 | unsigned HasExtQuals : 1; |
1592 | |
1593 | /// The number of parameters this function has, not counting '...'. |
1594 | /// According to [implimits] 8 bits should be enough here but this is |
1595 | /// somewhat easy to exceed with metaprogramming and so we would like to |
1596 | /// keep NumParams as wide as reasonably possible. |
1597 | unsigned NumParams : 16; |
1598 | |
1599 | /// The type of exception specification this function has. |
1600 | unsigned ExceptionSpecType : 4; |
1601 | |
1602 | /// Whether this function has extended parameter information. |
1603 | unsigned HasExtParameterInfos : 1; |
1604 | |
1605 | /// Whether the function is variadic. |
1606 | unsigned Variadic : 1; |
1607 | |
1608 | /// Whether this function has a trailing return type. |
1609 | unsigned HasTrailingReturn : 1; |
1610 | }; |
1611 | |
1612 | class ObjCObjectTypeBitfields { |
1613 | friend class ObjCObjectType; |
1614 | |
1615 | unsigned : NumTypeBits; |
1616 | |
1617 | /// The number of type arguments stored directly on this object type. |
1618 | unsigned NumTypeArgs : 7; |
1619 | |
1620 | /// The number of protocols stored directly on this object type. |
1621 | unsigned NumProtocols : 6; |
1622 | |
1623 | /// Whether this is a "kindof" type. |
1624 | unsigned IsKindOf : 1; |
1625 | }; |
1626 | |
1627 | class ReferenceTypeBitfields { |
1628 | friend class ReferenceType; |
1629 | |
1630 | unsigned : NumTypeBits; |
1631 | |
1632 | /// True if the type was originally spelled with an lvalue sigil. |
1633 | /// This is never true of rvalue references but can also be false |
1634 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
1635 | /// as follows: |
1636 | /// |
1637 | /// typedef int &ref; // lvalue, spelled lvalue |
1638 | /// typedef int &&rvref; // rvalue |
1639 | /// ref &a; // lvalue, inner ref, spelled lvalue |
1640 | /// ref &&a; // lvalue, inner ref |
1641 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
1642 | /// rvref &&a; // rvalue, inner ref |
1643 | unsigned SpelledAsLValue : 1; |
1644 | |
1645 | /// True if the inner type is a reference type. This only happens |
1646 | /// in non-canonical forms. |
1647 | unsigned InnerRef : 1; |
1648 | }; |
1649 | |
1650 | class TypeWithKeywordBitfields { |
1651 | friend class TypeWithKeyword; |
1652 | |
1653 | unsigned : NumTypeBits; |
1654 | |
1655 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
1656 | unsigned Keyword : 8; |
1657 | }; |
1658 | |
1659 | enum { NumTypeWithKeywordBits = 8 }; |
1660 | |
1661 | class ElaboratedTypeBitfields { |
1662 | friend class ElaboratedType; |
1663 | |
1664 | unsigned : NumTypeBits; |
1665 | unsigned : NumTypeWithKeywordBits; |
1666 | |
1667 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
1668 | unsigned HasOwnedTagDecl : 1; |
1669 | }; |
1670 | |
1671 | class VectorTypeBitfields { |
1672 | friend class VectorType; |
1673 | friend class DependentVectorType; |
1674 | |
1675 | unsigned : NumTypeBits; |
1676 | |
1677 | /// The kind of vector, either a generic vector type or some |
1678 | /// target-specific vector type such as for AltiVec or Neon. |
1679 | unsigned VecKind : 3; |
1680 | /// The number of elements in the vector. |
1681 | uint32_t NumElements; |
1682 | }; |
1683 | |
1684 | class AttributedTypeBitfields { |
1685 | friend class AttributedType; |
1686 | |
1687 | unsigned : NumTypeBits; |
1688 | |
1689 | /// An AttributedType::Kind |
1690 | unsigned AttrKind : 32 - NumTypeBits; |
1691 | }; |
1692 | |
1693 | class AutoTypeBitfields { |
1694 | friend class AutoType; |
1695 | |
1696 | unsigned : NumTypeBits; |
1697 | |
1698 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
1699 | /// or '__auto_type'? AutoTypeKeyword value. |
1700 | unsigned Keyword : 2; |
1701 | |
1702 | /// The number of template arguments in the type-constraints, which is |
1703 | /// expected to be able to hold at least 1024 according to [implimits]. |
1704 | /// However as this limit is somewhat easy to hit with template |
1705 | /// metaprogramming we'd prefer to keep it as large as possible. |
1706 | /// At the moment it has been left as a non-bitfield since this type |
1707 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1708 | /// introduce the performance impact of a bitfield. |
1709 | unsigned NumArgs; |
1710 | }; |
1711 | |
1712 | class SubstTemplateTypeParmPackTypeBitfields { |
1713 | friend class SubstTemplateTypeParmPackType; |
1714 | |
1715 | unsigned : NumTypeBits; |
1716 | |
1717 | /// The number of template arguments in \c Arguments, which is |
1718 | /// expected to be able to hold at least 1024 according to [implimits]. |
1719 | /// However as this limit is somewhat easy to hit with template |
1720 | /// metaprogramming we'd prefer to keep it as large as possible. |
1721 | /// At the moment it has been left as a non-bitfield since this type |
1722 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1723 | /// introduce the performance impact of a bitfield. |
1724 | unsigned NumArgs; |
1725 | }; |
1726 | |
1727 | class TemplateSpecializationTypeBitfields { |
1728 | friend class TemplateSpecializationType; |
1729 | |
1730 | unsigned : NumTypeBits; |
1731 | |
1732 | /// Whether this template specialization type is a substituted type alias. |
1733 | unsigned TypeAlias : 1; |
1734 | |
1735 | /// The number of template arguments named in this class template |
1736 | /// specialization, which is expected to be able to hold at least 1024 |
1737 | /// according to [implimits]. However, as this limit is somewhat easy to |
1738 | /// hit with template metaprogramming we'd prefer to keep it as large |
1739 | /// as possible. At the moment it has been left as a non-bitfield since |
1740 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1741 | /// to introduce the performance impact of a bitfield. |
1742 | unsigned NumArgs; |
1743 | }; |
1744 | |
1745 | class DependentTemplateSpecializationTypeBitfields { |
1746 | friend class DependentTemplateSpecializationType; |
1747 | |
1748 | unsigned : NumTypeBits; |
1749 | unsigned : NumTypeWithKeywordBits; |
1750 | |
1751 | /// The number of template arguments named in this class template |
1752 | /// specialization, which is expected to be able to hold at least 1024 |
1753 | /// according to [implimits]. However, as this limit is somewhat easy to |
1754 | /// hit with template metaprogramming we'd prefer to keep it as large |
1755 | /// as possible. At the moment it has been left as a non-bitfield since |
1756 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1757 | /// to introduce the performance impact of a bitfield. |
1758 | unsigned NumArgs; |
1759 | }; |
1760 | |
1761 | class PackExpansionTypeBitfields { |
1762 | friend class PackExpansionType; |
1763 | |
1764 | unsigned : NumTypeBits; |
1765 | |
1766 | /// The number of expansions that this pack expansion will |
1767 | /// generate when substituted (+1), which is expected to be able to |
1768 | /// hold at least 1024 according to [implimits]. However, as this limit |
1769 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
1770 | /// keep it as large as possible. At the moment it has been left as a |
1771 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
1772 | /// there is no reason to introduce the performance impact of a bitfield. |
1773 | /// |
1774 | /// This field will only have a non-zero value when some of the parameter |
1775 | /// packs that occur within the pattern have been substituted but others |
1776 | /// have not. |
1777 | unsigned NumExpansions; |
1778 | }; |
1779 | |
1780 | union { |
1781 | TypeBitfields TypeBits; |
1782 | ArrayTypeBitfields ArrayTypeBits; |
1783 | ConstantArrayTypeBitfields ConstantArrayTypeBits; |
1784 | AttributedTypeBitfields AttributedTypeBits; |
1785 | AutoTypeBitfields AutoTypeBits; |
1786 | BuiltinTypeBitfields BuiltinTypeBits; |
1787 | FunctionTypeBitfields FunctionTypeBits; |
1788 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
1789 | ReferenceTypeBitfields ReferenceTypeBits; |
1790 | TypeWithKeywordBitfields TypeWithKeywordBits; |
1791 | ElaboratedTypeBitfields ElaboratedTypeBits; |
1792 | VectorTypeBitfields VectorTypeBits; |
1793 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
1794 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
1795 | DependentTemplateSpecializationTypeBitfields |
1796 | DependentTemplateSpecializationTypeBits; |
1797 | PackExpansionTypeBitfields PackExpansionTypeBits; |
1798 | }; |
1799 | |
1800 | private: |
1801 | template <class T> friend class TypePropertyCache; |
1802 | |
1803 | /// Set whether this type comes from an AST file. |
1804 | void setFromAST(bool V = true) const { |
1805 | TypeBits.FromAST = V; |
1806 | } |
1807 | |
1808 | protected: |
1809 | friend class ASTContext; |
1810 | |
1811 | Type(TypeClass tc, QualType canon, TypeDependence Dependence) |
1812 | : ExtQualsTypeCommonBase(this, |
1813 | canon.isNull() ? QualType(this_(), 0) : canon) { |
1814 | static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase), |
1815 | "changing bitfields changed sizeof(Type)!"); |
1816 | static_assert(alignof(decltype(*this)) % sizeof(void *) == 0, |
1817 | "Insufficient alignment!"); |
1818 | TypeBits.TC = tc; |
1819 | TypeBits.Dependence = static_cast<unsigned>(Dependence); |
1820 | TypeBits.CacheValid = false; |
1821 | TypeBits.CachedLocalOrUnnamed = false; |
1822 | TypeBits.CachedLinkage = NoLinkage; |
1823 | TypeBits.FromAST = false; |
1824 | } |
1825 | |
1826 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
1827 | Type *this_() { return this; } |
1828 | |
1829 | void setDependence(TypeDependence D) { |
1830 | TypeBits.Dependence = static_cast<unsigned>(D); |
1831 | } |
1832 | |
1833 | void addDependence(TypeDependence D) { setDependence(getDependence() | D); } |
1834 | |
1835 | public: |
1836 | friend class ASTReader; |
1837 | friend class ASTWriter; |
1838 | template <class T> friend class serialization::AbstractTypeReader; |
1839 | template <class T> friend class serialization::AbstractTypeWriter; |
1840 | |
1841 | Type(const Type &) = delete; |
1842 | Type(Type &&) = delete; |
1843 | Type &operator=(const Type &) = delete; |
1844 | Type &operator=(Type &&) = delete; |
1845 | |
1846 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
1847 | |
1848 | /// Whether this type comes from an AST file. |
1849 | bool isFromAST() const { return TypeBits.FromAST; } |
1850 | |
1851 | /// Whether this type is or contains an unexpanded parameter |
1852 | /// pack, used to support C++0x variadic templates. |
1853 | /// |
1854 | /// A type that contains a parameter pack shall be expanded by the |
1855 | /// ellipsis operator at some point. For example, the typedef in the |
1856 | /// following example contains an unexpanded parameter pack 'T': |
1857 | /// |
1858 | /// \code |
1859 | /// template<typename ...T> |
1860 | /// struct X { |
1861 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
1862 | /// }; |
1863 | /// \endcode |
1864 | /// |
1865 | /// Note that this routine does not specify which |
1866 | bool containsUnexpandedParameterPack() const { |
1867 | return getDependence() & TypeDependence::UnexpandedPack; |
1868 | } |
1869 | |
1870 | /// Determines if this type would be canonical if it had no further |
1871 | /// qualification. |
1872 | bool isCanonicalUnqualified() const { |
1873 | return CanonicalType == QualType(this, 0); |
1874 | } |
1875 | |
1876 | /// Pull a single level of sugar off of this locally-unqualified type. |
1877 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
1878 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
1879 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
1880 | |
1881 | /// As an extension, we classify types as one of "sized" or "sizeless"; |
1882 | /// every type is one or the other. Standard types are all sized; |
1883 | /// sizeless types are purely an extension. |
1884 | /// |
1885 | /// Sizeless types contain data with no specified size, alignment, |
1886 | /// or layout. |
1887 | bool isSizelessType() const; |
1888 | bool isSizelessBuiltinType() const; |
1889 | |
1890 | /// Determines if this is a sizeless type supported by the |
1891 | /// 'arm_sve_vector_bits' type attribute, which can be applied to a single |
1892 | /// SVE vector or predicate, excluding tuple types such as svint32x4_t. |
1893 | bool isVLSTBuiltinType() const; |
1894 | |
1895 | /// Returns the representative type for the element of an SVE builtin type. |
1896 | /// This is used to represent fixed-length SVE vectors created with the |
1897 | /// 'arm_sve_vector_bits' type attribute as VectorType. |
1898 | QualType getSveEltType(const ASTContext &Ctx) const; |
1899 | |
1900 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
1901 | /// object types, function types, and incomplete types. |
1902 | |
1903 | /// Return true if this is an incomplete type. |
1904 | /// A type that can describe objects, but which lacks information needed to |
1905 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
1906 | /// routine will need to determine if the size is actually required. |
1907 | /// |
1908 | /// Def If non-null, and the type refers to some kind of declaration |
1909 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
1910 | /// class), will be set to the declaration. |
1911 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
1912 | |
1913 | /// Return true if this is an incomplete or object |
1914 | /// type, in other words, not a function type. |
1915 | bool isIncompleteOrObjectType() const { |
1916 | return !isFunctionType(); |
1917 | } |
1918 | |
1919 | /// Determine whether this type is an object type. |
1920 | bool isObjectType() const { |
1921 | // C++ [basic.types]p8: |
1922 | // An object type is a (possibly cv-qualified) type that is not a |
1923 | // function type, not a reference type, and not a void type. |
1924 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
1925 | } |
1926 | |
1927 | /// Return true if this is a literal type |
1928 | /// (C++11 [basic.types]p10) |
1929 | bool isLiteralType(const ASTContext &Ctx) const; |
1930 | |
1931 | /// Determine if this type is a structural type, per C++20 [temp.param]p7. |
1932 | bool isStructuralType() const; |
1933 | |
1934 | /// Test if this type is a standard-layout type. |
1935 | /// (C++0x [basic.type]p9) |
1936 | bool isStandardLayoutType() const; |
1937 | |
1938 | /// Helper methods to distinguish type categories. All type predicates |
1939 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
1940 | |
1941 | /// Returns true if the type is a builtin type. |
1942 | bool isBuiltinType() const; |
1943 | |
1944 | /// Test for a particular builtin type. |
1945 | bool isSpecificBuiltinType(unsigned K) const; |
1946 | |
1947 | /// Test for a type which does not represent an actual type-system type but |
1948 | /// is instead used as a placeholder for various convenient purposes within |
1949 | /// Clang. All such types are BuiltinTypes. |
1950 | bool isPlaceholderType() const; |
1951 | const BuiltinType *getAsPlaceholderType() const; |
1952 | |
1953 | /// Test for a specific placeholder type. |
1954 | bool isSpecificPlaceholderType(unsigned K) const; |
1955 | |
1956 | /// Test for a placeholder type other than Overload; see |
1957 | /// BuiltinType::isNonOverloadPlaceholderType. |
1958 | bool isNonOverloadPlaceholderType() const; |
1959 | |
1960 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
1961 | /// isComplexIntegerType() can be used to test for complex integers. |
1962 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
1963 | bool isEnumeralType() const; |
1964 | |
1965 | /// Determine whether this type is a scoped enumeration type. |
1966 | bool isScopedEnumeralType() const; |
1967 | bool isBooleanType() const; |
1968 | bool isCharType() const; |
1969 | bool isWideCharType() const; |
1970 | bool isChar8Type() const; |
1971 | bool isChar16Type() const; |
1972 | bool isChar32Type() const; |
1973 | bool isAnyCharacterType() const; |
1974 | bool isIntegralType(const ASTContext &Ctx) const; |
1975 | |
1976 | /// Determine whether this type is an integral or enumeration type. |
1977 | bool isIntegralOrEnumerationType() const; |
1978 | |
1979 | /// Determine whether this type is an integral or unscoped enumeration type. |
1980 | bool isIntegralOrUnscopedEnumerationType() const; |
1981 | bool isUnscopedEnumerationType() const; |
1982 | |
1983 | /// Floating point categories. |
1984 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
1985 | /// isComplexType() does *not* include complex integers (a GCC extension). |
1986 | /// isComplexIntegerType() can be used to test for complex integers. |
1987 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
1988 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
1989 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
1990 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
1991 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
1992 | bool isBFloat16Type() const; |
1993 | bool isFloat128Type() const; |
1994 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
1995 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
1996 | bool isVoidType() const; // C99 6.2.5p19 |
1997 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
1998 | bool isAggregateType() const; |
1999 | bool isFundamentalType() const; |
2000 | bool isCompoundType() const; |
2001 | |
2002 | // Type Predicates: Check to see if this type is structurally the specified |
2003 | // type, ignoring typedefs and qualifiers. |
2004 | bool isFunctionType() const; |
2005 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
2006 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
2007 | bool isPointerType() const; |
2008 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
2009 | bool isBlockPointerType() const; |
2010 | bool isVoidPointerType() const; |
2011 | bool isReferenceType() const; |
2012 | bool isLValueReferenceType() const; |
2013 | bool isRValueReferenceType() const; |
2014 | bool isObjectPointerType() const; |
2015 | bool isFunctionPointerType() const; |
2016 | bool isFunctionReferenceType() const; |
2017 | bool isMemberPointerType() const; |
2018 | bool isMemberFunctionPointerType() const; |
2019 | bool isMemberDataPointerType() const; |
2020 | bool isArrayType() const; |
2021 | bool isConstantArrayType() const; |
2022 | bool isIncompleteArrayType() const; |
2023 | bool isVariableArrayType() const; |
2024 | bool isDependentSizedArrayType() const; |
2025 | bool isRecordType() const; |
2026 | bool isClassType() const; |
2027 | bool isStructureType() const; |
2028 | bool isObjCBoxableRecordType() const; |
2029 | bool isInterfaceType() const; |
2030 | bool isStructureOrClassType() const; |
2031 | bool isUnionType() const; |
2032 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
2033 | bool isVectorType() const; // GCC vector type. |
2034 | bool isExtVectorType() const; // Extended vector type. |
2035 | bool isMatrixType() const; // Matrix type. |
2036 | bool isConstantMatrixType() const; // Constant matrix type. |
2037 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
2038 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
2039 | bool isObjCRetainableType() const; // ObjC object or block pointer |
2040 | bool isObjCLifetimeType() const; // (array of)* retainable type |
2041 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
2042 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
2043 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
2044 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
2045 | // for the common case. |
2046 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
2047 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
2048 | bool isObjCQualifiedIdType() const; // id<foo> |
2049 | bool isObjCQualifiedClassType() const; // Class<foo> |
2050 | bool isObjCObjectOrInterfaceType() const; |
2051 | bool isObjCIdType() const; // id |
2052 | bool isDecltypeType() const; |
2053 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
2054 | /// qualifier? |
2055 | /// |
2056 | /// This approximates the answer to the following question: if this |
2057 | /// translation unit were compiled in ARC, would this type be qualified |
2058 | /// with __unsafe_unretained? |
2059 | bool isObjCInertUnsafeUnretainedType() const { |
2060 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
2061 | } |
2062 | |
2063 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
2064 | /// object type, e.g., __kindof NSView * or __kindof id |
2065 | /// <NSCopying>. |
2066 | /// |
2067 | /// \param bound Will be set to the bound on non-id subtype types, |
2068 | /// which will be (possibly specialized) Objective-C class type, or |
2069 | /// null for 'id. |
2070 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
2071 | const ObjCObjectType *&bound) const; |
2072 | |
2073 | bool isObjCClassType() const; // Class |
2074 | |
2075 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
2076 | /// Class type, e.g., __kindof Class <NSCopying>. |
2077 | /// |
2078 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
2079 | /// here because Objective-C's type system cannot express "a class |
2080 | /// object for a subclass of NSFoo". |
2081 | bool isObjCClassOrClassKindOfType() const; |
2082 | |
2083 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
2084 | bool isObjCSelType() const; // Class |
2085 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
2086 | bool isObjCARCBridgableType() const; |
2087 | bool isCARCBridgableType() const; |
2088 | bool isTemplateTypeParmType() const; // C++ template type parameter |
2089 | bool isNullPtrType() const; // C++11 std::nullptr_t |
2090 | bool isNothrowT() const; // C++ std::nothrow_t |
2091 | bool isAlignValT() const; // C++17 std::align_val_t |
2092 | bool isStdByteType() const; // C++17 std::byte |
2093 | bool isAtomicType() const; // C11 _Atomic() |
2094 | bool isUndeducedAutoType() const; // C++11 auto or |
2095 | // C++14 decltype(auto) |
2096 | bool isTypedefNameType() const; // typedef or alias template |
2097 | |
2098 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
2099 | bool is##Id##Type() const; |
2100 | #include "clang/Basic/OpenCLImageTypes.def" |
2101 | |
2102 | bool isImageType() const; // Any OpenCL image type |
2103 | |
2104 | bool isSamplerT() const; // OpenCL sampler_t |
2105 | bool isEventT() const; // OpenCL event_t |
2106 | bool isClkEventT() const; // OpenCL clk_event_t |
2107 | bool isQueueT() const; // OpenCL queue_t |
2108 | bool isReserveIDT() const; // OpenCL reserve_id_t |
2109 | |
2110 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
2111 | bool is##Id##Type() const; |
2112 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2113 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
2114 | bool isOCLIntelSubgroupAVCType() const; |
2115 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
2116 | |
2117 | bool isPipeType() const; // OpenCL pipe type |
2118 | bool isExtIntType() const; // Extended Int Type |
2119 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
2120 | |
2121 | /// Determines if this type, which must satisfy |
2122 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
2123 | /// than implicitly __strong. |
2124 | bool isObjCARCImplicitlyUnretainedType() const; |
2125 | |
2126 | /// Check if the type is the CUDA device builtin surface type. |
2127 | bool isCUDADeviceBuiltinSurfaceType() const; |
2128 | /// Check if the type is the CUDA device builtin texture type. |
2129 | bool isCUDADeviceBuiltinTextureType() const; |
2130 | |
2131 | /// Return the implicit lifetime for this type, which must not be dependent. |
2132 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
2133 | |
2134 | enum ScalarTypeKind { |
2135 | STK_CPointer, |
2136 | STK_BlockPointer, |
2137 | STK_ObjCObjectPointer, |
2138 | STK_MemberPointer, |
2139 | STK_Bool, |
2140 | STK_Integral, |
2141 | STK_Floating, |
2142 | STK_IntegralComplex, |
2143 | STK_FloatingComplex, |
2144 | STK_FixedPoint |
2145 | }; |
2146 | |
2147 | /// Given that this is a scalar type, classify it. |
2148 | ScalarTypeKind getScalarTypeKind() const; |
2149 | |
2150 | TypeDependence getDependence() const { |
2151 | return static_cast<TypeDependence>(TypeBits.Dependence); |
2152 | } |
2153 | |
2154 | /// Whether this type is an error type. |
2155 | bool containsErrors() const { |
2156 | return getDependence() & TypeDependence::Error; |
2157 | } |
2158 | |
2159 | /// Whether this type is a dependent type, meaning that its definition |
2160 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
2161 | bool isDependentType() const { |
2162 | return getDependence() & TypeDependence::Dependent; |
2163 | } |
2164 | |
2165 | /// Determine whether this type is an instantiation-dependent type, |
2166 | /// meaning that the type involves a template parameter (even if the |
2167 | /// definition does not actually depend on the type substituted for that |
2168 | /// template parameter). |
2169 | bool isInstantiationDependentType() const { |
2170 | return getDependence() & TypeDependence::Instantiation; |
2171 | } |
2172 | |
2173 | /// Determine whether this type is an undeduced type, meaning that |
2174 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
2175 | /// deduced. |
2176 | bool isUndeducedType() const; |
2177 | |
2178 | /// Whether this type is a variably-modified type (C99 6.7.5). |
2179 | bool isVariablyModifiedType() const { |
2180 | return getDependence() & TypeDependence::VariablyModified; |
2181 | } |
2182 | |
2183 | /// Whether this type involves a variable-length array type |
2184 | /// with a definite size. |
2185 | bool hasSizedVLAType() const; |
2186 | |
2187 | /// Whether this type is or contains a local or unnamed type. |
2188 | bool hasUnnamedOrLocalType() const; |
2189 | |
2190 | bool isOverloadableType() const; |
2191 | |
2192 | /// Determine wither this type is a C++ elaborated-type-specifier. |
2193 | bool isElaboratedTypeSpecifier() const; |
2194 | |
2195 | bool canDecayToPointerType() const; |
2196 | |
2197 | /// Whether this type is represented natively as a pointer. This includes |
2198 | /// pointers, references, block pointers, and Objective-C interface, |
2199 | /// qualified id, and qualified interface types, as well as nullptr_t. |
2200 | bool hasPointerRepresentation() const; |
2201 | |
2202 | /// Whether this type can represent an objective pointer type for the |
2203 | /// purpose of GC'ability |
2204 | bool hasObjCPointerRepresentation() const; |
2205 | |
2206 | /// Determine whether this type has an integer representation |
2207 | /// of some sort, e.g., it is an integer type or a vector. |
2208 | bool hasIntegerRepresentation() const; |
2209 | |
2210 | /// Determine whether this type has an signed integer representation |
2211 | /// of some sort, e.g., it is an signed integer type or a vector. |
2212 | bool hasSignedIntegerRepresentation() const; |
2213 | |
2214 | /// Determine whether this type has an unsigned integer representation |
2215 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
2216 | bool hasUnsignedIntegerRepresentation() const; |
2217 | |
2218 | /// Determine whether this type has a floating-point representation |
2219 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
2220 | bool hasFloatingRepresentation() const; |
2221 | |
2222 | // Type Checking Functions: Check to see if this type is structurally the |
2223 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
2224 | // the best type we can. |
2225 | const RecordType *getAsStructureType() const; |
2226 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
2227 | const RecordType *getAsUnionType() const; |
2228 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
2229 | const ObjCObjectType *getAsObjCInterfaceType() const; |
2230 | |
2231 | // The following is a convenience method that returns an ObjCObjectPointerType |
2232 | // for object declared using an interface. |
2233 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
2234 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
2235 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
2236 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
2237 | |
2238 | /// Retrieves the CXXRecordDecl that this type refers to, either |
2239 | /// because the type is a RecordType or because it is the injected-class-name |
2240 | /// type of a class template or class template partial specialization. |
2241 | CXXRecordDecl *getAsCXXRecordDecl() const; |
2242 | |
2243 | /// Retrieves the RecordDecl this type refers to. |
2244 | RecordDecl *getAsRecordDecl() const; |
2245 | |
2246 | /// Retrieves the TagDecl that this type refers to, either |
2247 | /// because the type is a TagType or because it is the injected-class-name |
2248 | /// type of a class template or class template partial specialization. |
2249 | TagDecl *getAsTagDecl() const; |
2250 | |
2251 | /// If this is a pointer or reference to a RecordType, return the |
2252 | /// CXXRecordDecl that the type refers to. |
2253 | /// |
2254 | /// If this is not a pointer or reference, or the type being pointed to does |
2255 | /// not refer to a CXXRecordDecl, returns NULL. |
2256 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
2257 | |
2258 | /// Get the DeducedType whose type will be deduced for a variable with |
2259 | /// an initializer of this type. This looks through declarators like pointer |
2260 | /// types, but not through decltype or typedefs. |
2261 | DeducedType *getContainedDeducedType() const; |
2262 | |
2263 | /// Get the AutoType whose type will be deduced for a variable with |
2264 | /// an initializer of this type. This looks through declarators like pointer |
2265 | /// types, but not through decltype or typedefs. |
2266 | AutoType *getContainedAutoType() const { |
2267 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
2268 | } |
2269 | |
2270 | /// Determine whether this type was written with a leading 'auto' |
2271 | /// corresponding to a trailing return type (possibly for a nested |
2272 | /// function type within a pointer to function type or similar). |
2273 | bool hasAutoForTrailingReturnType() const; |
2274 | |
2275 | /// Member-template getAs<specific type>'. Look through sugar for |
2276 | /// an instance of \<specific type>. This scheme will eventually |
2277 | /// replace the specific getAsXXXX methods above. |
2278 | /// |
2279 | /// There are some specializations of this member template listed |
2280 | /// immediately following this class. |
2281 | template <typename T> const T *getAs() const; |
2282 | |
2283 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
2284 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
2285 | /// This is used when you need to walk over sugar nodes that represent some |
2286 | /// kind of type adjustment from a type that was written as a \<specific type> |
2287 | /// to another type that is still canonically a \<specific type>. |
2288 | template <typename T> const T *getAsAdjusted() const; |
2289 | |
2290 | /// A variant of getAs<> for array types which silently discards |
2291 | /// qualifiers from the outermost type. |
2292 | const ArrayType *getAsArrayTypeUnsafe() const; |
2293 | |
2294 | /// Member-template castAs<specific type>. Look through sugar for |
2295 | /// the underlying instance of \<specific type>. |
2296 | /// |
2297 | /// This method has the same relationship to getAs<T> as cast<T> has |
2298 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
2299 | /// have the intended type, and this method will never return null. |
2300 | template <typename T> const T *castAs() const; |
2301 | |
2302 | /// A variant of castAs<> for array type which silently discards |
2303 | /// qualifiers from the outermost type. |
2304 | const ArrayType *castAsArrayTypeUnsafe() const; |
2305 | |
2306 | /// Determine whether this type had the specified attribute applied to it |
2307 | /// (looking through top-level type sugar). |
2308 | bool hasAttr(attr::Kind AK) const; |
2309 | |
2310 | /// Get the base element type of this type, potentially discarding type |
2311 | /// qualifiers. This should never be used when type qualifiers |
2312 | /// are meaningful. |
2313 | const Type *getBaseElementTypeUnsafe() const; |
2314 | |
2315 | /// If this is an array type, return the element type of the array, |
2316 | /// potentially with type qualifiers missing. |
2317 | /// This should never be used when type qualifiers are meaningful. |
2318 | const Type *getArrayElementTypeNoTypeQual() const; |
2319 | |
2320 | /// If this is a pointer type, return the pointee type. |
2321 | /// If this is an array type, return the array element type. |
2322 | /// This should never be used when type qualifiers are meaningful. |
2323 | const Type *getPointeeOrArrayElementType() const; |
2324 | |
2325 | /// If this is a pointer, ObjC object pointer, or block |
2326 | /// pointer, this returns the respective pointee. |
2327 | QualType getPointeeType() const; |
2328 | |
2329 | /// Return the specified type with any "sugar" removed from the type, |
2330 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
2331 | const Type *getUnqualifiedDesugaredType() const; |
2332 | |
2333 | /// More type predicates useful for type checking/promotion |
2334 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
2335 | |
2336 | /// Return true if this is an integer type that is |
2337 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
2338 | /// or an enum decl which has a signed representation. |
2339 | bool isSignedIntegerType() const; |
2340 | |
2341 | /// Return true if this is an integer type that is |
2342 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
2343 | /// or an enum decl which has an unsigned representation. |
2344 | bool isUnsignedIntegerType() const; |
2345 | |
2346 | /// Determines whether this is an integer type that is signed or an |
2347 | /// enumeration types whose underlying type is a signed integer type. |
2348 | bool isSignedIntegerOrEnumerationType() const; |
2349 | |
2350 | /// Determines whether this is an integer type that is unsigned or an |
2351 | /// enumeration types whose underlying type is a unsigned integer type. |
2352 | bool isUnsignedIntegerOrEnumerationType() const; |
2353 | |
2354 | /// Return true if this is a fixed point type according to |
2355 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
2356 | bool isFixedPointType() const; |
2357 | |
2358 | /// Return true if this is a fixed point or integer type. |
2359 | bool isFixedPointOrIntegerType() const; |
2360 | |
2361 | /// Return true if this is a saturated fixed point type according to |
2362 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2363 | bool isSaturatedFixedPointType() const; |
2364 | |
2365 | /// Return true if this is a saturated fixed point type according to |
2366 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2367 | bool isUnsaturatedFixedPointType() const; |
2368 | |
2369 | /// Return true if this is a fixed point type that is signed according |
2370 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2371 | bool isSignedFixedPointType() const; |
2372 | |
2373 | /// Return true if this is a fixed point type that is unsigned according |
2374 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2375 | bool isUnsignedFixedPointType() const; |
2376 | |
2377 | /// Return true if this is not a variable sized type, |
2378 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
2379 | /// incomplete types. |
2380 | bool isConstantSizeType() const; |
2381 | |
2382 | /// Returns true if this type can be represented by some |
2383 | /// set of type specifiers. |
2384 | bool isSpecifierType() const; |
2385 | |
2386 | /// Determine the linkage of this type. |
2387 | Linkage getLinkage() const; |
2388 | |
2389 | /// Determine the visibility of this type. |
2390 | Visibility getVisibility() const { |
2391 | return getLinkageAndVisibility().getVisibility(); |
2392 | } |
2393 | |
2394 | /// Return true if the visibility was explicitly set is the code. |
2395 | bool isVisibilityExplicit() const { |
2396 | return getLinkageAndVisibility().isVisibilityExplicit(); |
2397 | } |
2398 | |
2399 | /// Determine the linkage and visibility of this type. |
2400 | LinkageInfo getLinkageAndVisibility() const; |
2401 | |
2402 | /// True if the computed linkage is valid. Used for consistency |
2403 | /// checking. Should always return true. |
2404 | bool isLinkageValid() const; |
2405 | |
2406 | /// Determine the nullability of the given type. |
2407 | /// |
2408 | /// Note that nullability is only captured as sugar within the type |
2409 | /// system, not as part of the canonical type, so nullability will |
2410 | /// be lost by canonicalization and desugaring. |
2411 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
2412 | |
2413 | /// Determine whether the given type can have a nullability |
2414 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
2415 | /// |
2416 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
2417 | /// this type can have nullability because it is dependent. |
2418 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
2419 | |
2420 | /// Retrieve the set of substitutions required when accessing a member |
2421 | /// of the Objective-C receiver type that is declared in the given context. |
2422 | /// |
2423 | /// \c *this is the type of the object we're operating on, e.g., the |
2424 | /// receiver for a message send or the base of a property access, and is |
2425 | /// expected to be of some object or object pointer type. |
2426 | /// |
2427 | /// \param dc The declaration context for which we are building up a |
2428 | /// substitution mapping, which should be an Objective-C class, extension, |
2429 | /// category, or method within. |
2430 | /// |
2431 | /// \returns an array of type arguments that can be substituted for |
2432 | /// the type parameters of the given declaration context in any type described |
2433 | /// within that context, or an empty optional to indicate that no |
2434 | /// substitution is required. |
2435 | Optional<ArrayRef<QualType>> |
2436 | getObjCSubstitutions(const DeclContext *dc) const; |
2437 | |
2438 | /// Determines if this is an ObjC interface type that may accept type |
2439 | /// parameters. |
2440 | bool acceptsObjCTypeParams() const; |
2441 | |
2442 | const char *getTypeClassName() const; |
2443 | |
2444 | QualType getCanonicalTypeInternal() const { |
2445 | return CanonicalType; |
2446 | } |
2447 | |
2448 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
2449 | void dump() const; |
2450 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
2451 | }; |
2452 | |
2453 | /// This will check for a TypedefType by removing any existing sugar |
2454 | /// until it reaches a TypedefType or a non-sugared type. |
2455 | template <> const TypedefType *Type::getAs() const; |
2456 | |
2457 | /// This will check for a TemplateSpecializationType by removing any |
2458 | /// existing sugar until it reaches a TemplateSpecializationType or a |
2459 | /// non-sugared type. |
2460 | template <> const TemplateSpecializationType *Type::getAs() const; |
2461 | |
2462 | /// This will check for an AttributedType by removing any existing sugar |
2463 | /// until it reaches an AttributedType or a non-sugared type. |
2464 | template <> const AttributedType *Type::getAs() const; |
2465 | |
2466 | // We can do canonical leaf types faster, because we don't have to |
2467 | // worry about preserving child type decoration. |
2468 | #define TYPE(Class, Base) |
2469 | #define LEAF_TYPE(Class) \ |
2470 | template <> inline const Class##Type *Type::getAs() const { \ |
2471 | return dyn_cast<Class##Type>(CanonicalType); \ |
2472 | } \ |
2473 | template <> inline const Class##Type *Type::castAs() const { \ |
2474 | return cast<Class##Type>(CanonicalType); \ |
2475 | } |
2476 | #include "clang/AST/TypeNodes.inc" |
2477 | |
2478 | /// This class is used for builtin types like 'int'. Builtin |
2479 | /// types are always canonical and have a literal name field. |
2480 | class BuiltinType : public Type { |
2481 | public: |
2482 | enum Kind { |
2483 | // OpenCL image types |
2484 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
2485 | #include "clang/Basic/OpenCLImageTypes.def" |
2486 | // OpenCL extension types |
2487 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
2488 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2489 | // SVE Types |
2490 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
2491 | #include "clang/Basic/AArch64SVEACLETypes.def" |
2492 | // PPC MMA Types |
2493 | #define PPC_VECTOR_TYPE(Name, Id, Size) Id, |
2494 | #include "clang/Basic/PPCTypes.def" |
2495 | // RVV Types |
2496 | #define RVV_TYPE(Name, Id, SingletonId) Id, |
2497 | #include "clang/Basic/RISCVVTypes.def" |
2498 | // All other builtin types |
2499 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
2500 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
2501 | #include "clang/AST/BuiltinTypes.def" |
2502 | }; |
2503 | |
2504 | private: |
2505 | friend class ASTContext; // ASTContext creates these. |
2506 | |
2507 | BuiltinType(Kind K) |
2508 | : Type(Builtin, QualType(), |
2509 | K == Dependent ? TypeDependence::DependentInstantiation |
2510 | : TypeDependence::None) { |
2511 | BuiltinTypeBits.Kind = K; |
2512 | } |
2513 | |
2514 | public: |
2515 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
2516 | StringRef getName(const PrintingPolicy &Policy) const; |
2517 | |
2518 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
2519 | // The StringRef is null-terminated. |
2520 | StringRef str = getName(Policy); |
2521 | assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast <void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 2521, __PRETTY_FUNCTION__)); |
2522 | return str.data(); |
2523 | } |
2524 | |
2525 | bool isSugared() const { return false; } |
2526 | QualType desugar() const { return QualType(this, 0); } |
2527 | |
2528 | bool isInteger() const { |
2529 | return getKind() >= Bool && getKind() <= Int128; |
2530 | } |
2531 | |
2532 | bool isSignedInteger() const { |
2533 | return getKind() >= Char_S && getKind() <= Int128; |
2534 | } |
2535 | |
2536 | bool isUnsignedInteger() const { |
2537 | return getKind() >= Bool && getKind() <= UInt128; |
2538 | } |
2539 | |
2540 | bool isFloatingPoint() const { |
2541 | return getKind() >= Half && getKind() <= Float128; |
2542 | } |
2543 | |
2544 | /// Determines whether the given kind corresponds to a placeholder type. |
2545 | static bool isPlaceholderTypeKind(Kind K) { |
2546 | return K >= Overload; |
2547 | } |
2548 | |
2549 | /// Determines whether this type is a placeholder type, i.e. a type |
2550 | /// which cannot appear in arbitrary positions in a fully-formed |
2551 | /// expression. |
2552 | bool isPlaceholderType() const { |
2553 | return isPlaceholderTypeKind(getKind()); |
2554 | } |
2555 | |
2556 | /// Determines whether this type is a placeholder type other than |
2557 | /// Overload. Most placeholder types require only syntactic |
2558 | /// information about their context in order to be resolved (e.g. |
2559 | /// whether it is a call expression), which means they can (and |
2560 | /// should) be resolved in an earlier "phase" of analysis. |
2561 | /// Overload expressions sometimes pick up further information |
2562 | /// from their context, like whether the context expects a |
2563 | /// specific function-pointer type, and so frequently need |
2564 | /// special treatment. |
2565 | bool isNonOverloadPlaceholderType() const { |
2566 | return getKind() > Overload; |
2567 | } |
2568 | |
2569 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
2570 | }; |
2571 | |
2572 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
2573 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
2574 | class ComplexType : public Type, public llvm::FoldingSetNode { |
2575 | friend class ASTContext; // ASTContext creates these. |
2576 | |
2577 | QualType ElementType; |
2578 | |
2579 | ComplexType(QualType Element, QualType CanonicalPtr) |
2580 | : Type(Complex, CanonicalPtr, Element->getDependence()), |
2581 | ElementType(Element) {} |
2582 | |
2583 | public: |
2584 | QualType getElementType() const { return ElementType; } |
2585 | |
2586 | bool isSugared() const { return false; } |
2587 | QualType desugar() const { return QualType(this, 0); } |
2588 | |
2589 | void Profile(llvm::FoldingSetNodeID &ID) { |
2590 | Profile(ID, getElementType()); |
2591 | } |
2592 | |
2593 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
2594 | ID.AddPointer(Element.getAsOpaquePtr()); |
2595 | } |
2596 | |
2597 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
2598 | }; |
2599 | |
2600 | /// Sugar for parentheses used when specifying types. |
2601 | class ParenType : public Type, public llvm::FoldingSetNode { |
2602 | friend class ASTContext; // ASTContext creates these. |
2603 | |
2604 | QualType Inner; |
2605 | |
2606 | ParenType(QualType InnerType, QualType CanonType) |
2607 | : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {} |
2608 | |
2609 | public: |
2610 | QualType getInnerType() const { return Inner; } |
2611 | |
2612 | bool isSugared() const { return true; } |
2613 | QualType desugar() const { return getInnerType(); } |
2614 | |
2615 | void Profile(llvm::FoldingSetNodeID &ID) { |
2616 | Profile(ID, getInnerType()); |
2617 | } |
2618 | |
2619 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
2620 | Inner.Profile(ID); |
2621 | } |
2622 | |
2623 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
2624 | }; |
2625 | |
2626 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
2627 | class PointerType : public Type, public llvm::FoldingSetNode { |
2628 | friend class ASTContext; // ASTContext creates these. |
2629 | |
2630 | QualType PointeeType; |
2631 | |
2632 | PointerType(QualType Pointee, QualType CanonicalPtr) |
2633 | : Type(Pointer, CanonicalPtr, Pointee->getDependence()), |
2634 | PointeeType(Pointee) {} |
2635 | |
2636 | public: |
2637 | QualType getPointeeType() const { return PointeeType; } |
2638 | |
2639 | bool isSugared() const { return false; } |
2640 | QualType desugar() const { return QualType(this, 0); } |
2641 | |
2642 | void Profile(llvm::FoldingSetNodeID &ID) { |
2643 | Profile(ID, getPointeeType()); |
2644 | } |
2645 | |
2646 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2647 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2648 | } |
2649 | |
2650 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
2651 | }; |
2652 | |
2653 | /// Represents a type which was implicitly adjusted by the semantic |
2654 | /// engine for arbitrary reasons. For example, array and function types can |
2655 | /// decay, and function types can have their calling conventions adjusted. |
2656 | class AdjustedType : public Type, public llvm::FoldingSetNode { |
2657 | QualType OriginalTy; |
2658 | QualType AdjustedTy; |
2659 | |
2660 | protected: |
2661 | friend class ASTContext; // ASTContext creates these. |
2662 | |
2663 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, |
2664 | QualType CanonicalPtr) |
2665 | : Type(TC, CanonicalPtr, OriginalTy->getDependence()), |
2666 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} |
2667 | |
2668 | public: |
2669 | QualType getOriginalType() const { return OriginalTy; } |
2670 | QualType getAdjustedType() const { return AdjustedTy; } |
2671 | |
2672 | bool isSugared() const { return true; } |
2673 | QualType desugar() const { return AdjustedTy; } |
2674 | |
2675 | void Profile(llvm::FoldingSetNodeID &ID) { |
2676 | Profile(ID, OriginalTy, AdjustedTy); |
2677 | } |
2678 | |
2679 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { |
2680 | ID.AddPointer(Orig.getAsOpaquePtr()); |
2681 | ID.AddPointer(New.getAsOpaquePtr()); |
2682 | } |
2683 | |
2684 | static bool classof(const Type *T) { |
2685 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; |
2686 | } |
2687 | }; |
2688 | |
2689 | /// Represents a pointer type decayed from an array or function type. |
2690 | class DecayedType : public AdjustedType { |
2691 | friend class ASTContext; // ASTContext creates these. |
2692 | |
2693 | inline |
2694 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); |
2695 | |
2696 | public: |
2697 | QualType getDecayedType() const { return getAdjustedType(); } |
2698 | |
2699 | inline QualType getPointeeType() const; |
2700 | |
2701 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } |
2702 | }; |
2703 | |
2704 | /// Pointer to a block type. |
2705 | /// This type is to represent types syntactically represented as |
2706 | /// "void (^)(int)", etc. Pointee is required to always be a function type. |
2707 | class BlockPointerType : public Type, public llvm::FoldingSetNode { |
2708 | friend class ASTContext; // ASTContext creates these. |
2709 | |
2710 | // Block is some kind of pointer type |
2711 | QualType PointeeType; |
2712 | |
2713 | BlockPointerType(QualType Pointee, QualType CanonicalCls) |
2714 | : Type(BlockPointer, CanonicalCls, Pointee->getDependence()), |
2715 | PointeeType(Pointee) {} |
2716 | |
2717 | public: |
2718 | // Get the pointee type. Pointee is required to always be a function type. |
2719 | QualType getPointeeType() const { return PointeeType; } |
2720 | |
2721 | bool isSugared() const { return false; } |
2722 | QualType desugar() const { return QualType(this, 0); } |
2723 | |
2724 | void Profile(llvm::FoldingSetNodeID &ID) { |
2725 | Profile(ID, getPointeeType()); |
2726 | } |
2727 | |
2728 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2729 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2730 | } |
2731 | |
2732 | static bool classof(const Type *T) { |
2733 | return T->getTypeClass() == BlockPointer; |
2734 | } |
2735 | }; |
2736 | |
2737 | /// Base for LValueReferenceType and RValueReferenceType |
2738 | class ReferenceType : public Type, public llvm::FoldingSetNode { |
2739 | QualType PointeeType; |
2740 | |
2741 | protected: |
2742 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, |
2743 | bool SpelledAsLValue) |
2744 | : Type(tc, CanonicalRef, Referencee->getDependence()), |
2745 | PointeeType(Referencee) { |
2746 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; |
2747 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); |
2748 | } |
2749 | |
2750 | public: |
2751 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } |
2752 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } |
2753 | |
2754 | QualType getPointeeTypeAsWritten() const { return PointeeType; } |
2755 | |
2756 | QualType getPointeeType() const { |
2757 | // FIXME: this might strip inner qualifiers; okay? |
2758 | const ReferenceType *T = this; |
2759 | while (T->isInnerRef()) |
2760 | T = T->PointeeType->castAs<ReferenceType>(); |
2761 | return T->PointeeType; |
2762 | } |
2763 | |
2764 | void Profile(llvm::FoldingSetNodeID &ID) { |
2765 | Profile(ID, PointeeType, isSpelledAsLValue()); |
2766 | } |
2767 | |
2768 | static void Profile(llvm::FoldingSetNodeID &ID, |
2769 | QualType Referencee, |
2770 | bool SpelledAsLValue) { |
2771 | ID.AddPointer(Referencee.getAsOpaquePtr()); |
2772 | ID.AddBoolean(SpelledAsLValue); |
2773 | } |
2774 | |
2775 | static bool classof(const Type *T) { |
2776 | return T->getTypeClass() == LValueReference || |
2777 | T->getTypeClass() == RValueReference; |
2778 | } |
2779 | }; |
2780 | |
2781 | /// An lvalue reference type, per C++11 [dcl.ref]. |
2782 | class LValueReferenceType : public ReferenceType { |
2783 | friend class ASTContext; // ASTContext creates these |
2784 | |
2785 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, |
2786 | bool SpelledAsLValue) |
2787 | : ReferenceType(LValueReference, Referencee, CanonicalRef, |
2788 | SpelledAsLValue) {} |
2789 | |
2790 | public: |
2791 | bool isSugared() const { return false; } |
2792 | QualType desugar() const { return QualType(this, 0); } |
2793 | |
2794 | static bool classof(const Type *T) { |
2795 | return T->getTypeClass() == LValueReference; |
2796 | } |
2797 | }; |
2798 | |
2799 | /// An rvalue reference type, per C++11 [dcl.ref]. |
2800 | class RValueReferenceType : public ReferenceType { |
2801 | friend class ASTContext; // ASTContext creates these |
2802 | |
2803 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) |
2804 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} |
2805 | |
2806 | public: |
2807 | bool isSugared() const { return false; } |
2808 | QualType desugar() const { return QualType(this, 0); } |
2809 | |
2810 | static bool classof(const Type *T) { |
2811 | return T->getTypeClass() == RValueReference; |
2812 | } |
2813 | }; |
2814 | |
2815 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. |
2816 | /// |
2817 | /// This includes both pointers to data members and pointer to member functions. |
2818 | class MemberPointerType : public Type, public llvm::FoldingSetNode { |
2819 | friend class ASTContext; // ASTContext creates these. |
2820 | |
2821 | QualType PointeeType; |
2822 | |
2823 | /// The class of which the pointee is a member. Must ultimately be a |
2824 | /// RecordType, but could be a typedef or a template parameter too. |
2825 | const Type *Class; |
2826 | |
2827 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) |
2828 | : Type(MemberPointer, CanonicalPtr, |
2829 | (Cls->getDependence() & ~TypeDependence::VariablyModified) | |
2830 | Pointee->getDependence()), |
2831 | PointeeType(Pointee), Class(Cls) {} |
2832 | |
2833 | public: |
2834 | QualType getPointeeType() const { return PointeeType; } |
2835 | |
2836 | /// Returns true if the member type (i.e. the pointee type) is a |
2837 | /// function type rather than a data-member type. |
2838 | bool isMemberFunctionPointer() const { |
2839 | return PointeeType->isFunctionProtoType(); |
2840 | } |
2841 | |
2842 | /// Returns true if the member type (i.e. the pointee type) is a |
2843 | /// data type rather than a function type. |
2844 | bool isMemberDataPointer() const { |
2845 | return !PointeeType->isFunctionProtoType(); |
2846 | } |
2847 | |
2848 | const Type *getClass() const { return Class; } |
2849 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; |
2850 | |
2851 | bool isSugared() const { return false; } |
2852 | QualType desugar() const { return QualType(this, 0); } |
2853 | |
2854 | void Profile(llvm::FoldingSetNodeID &ID) { |
2855 | Profile(ID, getPointeeType(), getClass()); |
2856 | } |
2857 | |
2858 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, |
2859 | const Type *Class) { |
2860 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2861 | ID.AddPointer(Class); |
2862 | } |
2863 | |
2864 | static bool classof(const Type *T) { |
2865 | return T->getTypeClass() == MemberPointer; |
2866 | } |
2867 | }; |
2868 | |
2869 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. |
2870 | class ArrayType : public Type, public llvm::FoldingSetNode { |
2871 | public: |
2872 | /// Capture whether this is a normal array (e.g. int X[4]) |
2873 | /// an array with a static size (e.g. int X[static 4]), or an array |
2874 | /// with a star size (e.g. int X[*]). |
2875 | /// 'static' is only allowed on function parameters. |
2876 | enum ArraySizeModifier { |
2877 | Normal, Static, Star |
2878 | }; |
2879 | |
2880 | private: |
2881 | /// The element type of the array. |
2882 | QualType ElementType; |
2883 | |
2884 | protected: |
2885 | friend class ASTContext; // ASTContext creates these. |
2886 | |
2887 | ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, |
2888 | unsigned tq, const Expr *sz = nullptr); |
2889 | |
2890 | public: |
2891 | QualType getElementType() const { return ElementType; } |
2892 | |
2893 | ArraySizeModifier getSizeModifier() const { |
2894 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); |
2895 | } |
2896 | |
2897 | Qualifiers getIndexTypeQualifiers() const { |
2898 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); |
2899 | } |
2900 | |
2901 | unsigned getIndexTypeCVRQualifiers() const { |
2902 | return ArrayTypeBits.IndexTypeQuals; |
2903 | } |
2904 | |
2905 | static bool classof(const Type *T) { |
2906 | return T->getTypeClass() == ConstantArray || |
2907 | T->getTypeClass() == VariableArray || |
2908 | T->getTypeClass() == IncompleteArray || |
2909 | T->getTypeClass() == DependentSizedArray; |
2910 | } |
2911 | }; |
2912 | |
2913 | /// Represents the canonical version of C arrays with a specified constant size. |
2914 | /// For example, the canonical type for 'int A[4 + 4*100]' is a |
2915 | /// ConstantArrayType where the element type is 'int' and the size is 404. |
2916 | class ConstantArrayType final |
2917 | : public ArrayType, |
2918 | private llvm::TrailingObjects<ConstantArrayType, const Expr *> { |
2919 | friend class ASTContext; // ASTContext creates these. |
2920 | friend TrailingObjects; |
2921 | |
2922 | llvm::APInt Size; // Allows us to unique the type. |
2923 | |
2924 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, |
2925 | const Expr *sz, ArraySizeModifier sm, unsigned tq) |
2926 | : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) { |
2927 | ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr; |
2928 | if (ConstantArrayTypeBits.HasStoredSizeExpr) { |
2929 | assert(!can.isNull() && "canonical constant array should not have size")((!can.isNull() && "canonical constant array should not have size" ) ? static_cast<void> (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 2929, __PRETTY_FUNCTION__)); |
2930 | *getTrailingObjects<const Expr*>() = sz; |
2931 | } |
2932 | } |
2933 | |
2934 | unsigned numTrailingObjects(OverloadToken<const Expr*>) const { |
2935 | return ConstantArrayTypeBits.HasStoredSizeExpr; |
2936 | } |
2937 | |
2938 | public: |
2939 | const llvm::APInt &getSize() const { return Size; } |
2940 | const Expr *getSizeExpr() const { |
2941 | return ConstantArrayTypeBits.HasStoredSizeExpr |
2942 | ? *getTrailingObjects<const Expr *>() |
2943 | : nullptr; |
2944 | } |
2945 | bool isSugared() const { return false; } |
2946 | QualType desugar() const { return QualType(this, 0); } |
2947 | |
2948 | /// Determine the number of bits required to address a member of |
2949 | // an array with the given element type and number of elements. |
2950 | static unsigned getNumAddressingBits(const ASTContext &Context, |
2951 | QualType ElementType, |
2952 | const llvm::APInt &NumElements); |
2953 | |
2954 | /// Determine the maximum number of active bits that an array's size |
2955 | /// can require, which limits the maximum size of the array. |
2956 | static unsigned getMaxSizeBits(const ASTContext &Context); |
2957 | |
2958 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
2959 | Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(), |
2960 | getSizeModifier(), getIndexTypeCVRQualifiers()); |
2961 | } |
2962 | |
2963 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx, |
2964 | QualType ET, const llvm::APInt &ArraySize, |
2965 | const Expr *SizeExpr, ArraySizeModifier SizeMod, |
2966 | unsigned TypeQuals); |
2967 | |
2968 | static bool classof(const Type *T) { |
2969 | return T->getTypeClass() == ConstantArray; |
2970 | } |
2971 | }; |
2972 | |
2973 | /// Represents a C array with an unspecified size. For example 'int A[]' has |
2974 | /// an IncompleteArrayType where the element type is 'int' and the size is |
2975 | /// unspecified. |
2976 | class IncompleteArrayType : public ArrayType { |
2977 | friend class ASTContext; // ASTContext creates these. |
2978 | |
2979 | IncompleteArrayType(QualType et, QualType can, |
2980 | ArraySizeModifier sm, unsigned tq) |
2981 | : ArrayType(IncompleteArray, et, can, sm, tq) {} |
2982 | |
2983 | public: |
2984 | friend class StmtIteratorBase; |
2985 | |
2986 | bool isSugared() const { return false; } |
2987 | QualType desugar() const { return QualType(this, 0); } |
2988 | |
2989 | static bool classof(const Type *T) { |
2990 | return T->getTypeClass() == IncompleteArray; |
2991 | } |
2992 | |
2993 | void Profile(llvm::FoldingSetNodeID &ID) { |
2994 | Profile(ID, getElementType(), getSizeModifier(), |
2995 | getIndexTypeCVRQualifiers()); |
2996 | } |
2997 | |
2998 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
2999 | ArraySizeModifier SizeMod, unsigned TypeQuals) { |
3000 | ID.AddPointer(ET.getAsOpaquePtr()); |
3001 | ID.AddInteger(SizeMod); |
3002 | ID.AddInteger(TypeQuals); |
3003 | } |
3004 | }; |
3005 | |
3006 | /// Represents a C array with a specified size that is not an |
3007 | /// integer-constant-expression. For example, 'int s[x+foo()]'. |
3008 | /// Since the size expression is an arbitrary expression, we store it as such. |
3009 | /// |
3010 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and |
3011 | /// should not be: two lexically equivalent variable array types could mean |
3012 | /// different things, for example, these variables do not have the same type |
3013 | /// dynamically: |
3014 | /// |
3015 | /// void foo(int x) { |
3016 | /// int Y[x]; |
3017 | /// ++x; |
3018 | /// int Z[x]; |
3019 | /// } |
3020 | class VariableArrayType : public ArrayType { |
3021 | friend class ASTContext; // ASTContext creates these. |
3022 | |
3023 | /// An assignment-expression. VLA's are only permitted within |
3024 | /// a function block. |
3025 | Stmt *SizeExpr; |
3026 | |
3027 | /// The range spanned by the left and right array brackets. |
3028 | SourceRange Brackets; |
3029 | |
3030 | VariableArrayType(QualType et, QualType can, Expr *e, |
3031 | ArraySizeModifier sm, unsigned tq, |
3032 | SourceRange brackets) |
3033 | : ArrayType(VariableArray, et, can, sm, tq, e), |
3034 | SizeExpr((Stmt*) e), Brackets(brackets) {} |
3035 | |
3036 | public: |
3037 | friend class StmtIteratorBase; |
3038 | |
3039 | Expr *getSizeExpr() const { |
3040 | // We use C-style casts instead of cast<> here because we do not wish |
3041 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3042 | return (Expr*) SizeExpr; |
3043 | } |
3044 | |
3045 | SourceRange getBracketsRange() const { return Brackets; } |
3046 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3047 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3048 | |
3049 | bool isSugared() const { return false; } |
3050 | QualType desugar() const { return QualType(this, 0); } |
3051 | |
3052 | static bool classof(const Type *T) { |
3053 | return T->getTypeClass() == VariableArray; |
3054 | } |
3055 | |
3056 | void Profile(llvm::FoldingSetNodeID &ID) { |
3057 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 3057); |
3058 | } |
3059 | }; |
3060 | |
3061 | /// Represents an array type in C++ whose size is a value-dependent expression. |
3062 | /// |
3063 | /// For example: |
3064 | /// \code |
3065 | /// template<typename T, int Size> |
3066 | /// class array { |
3067 | /// T data[Size]; |
3068 | /// }; |
3069 | /// \endcode |
3070 | /// |
3071 | /// For these types, we won't actually know what the array bound is |
3072 | /// until template instantiation occurs, at which point this will |
3073 | /// become either a ConstantArrayType or a VariableArrayType. |
3074 | class DependentSizedArrayType : public ArrayType { |
3075 | friend class ASTContext; // ASTContext creates these. |
3076 | |
3077 | const ASTContext &Context; |
3078 | |
3079 | /// An assignment expression that will instantiate to the |
3080 | /// size of the array. |
3081 | /// |
3082 | /// The expression itself might be null, in which case the array |
3083 | /// type will have its size deduced from an initializer. |
3084 | Stmt *SizeExpr; |
3085 | |
3086 | /// The range spanned by the left and right array brackets. |
3087 | SourceRange Brackets; |
3088 | |
3089 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, |
3090 | Expr *e, ArraySizeModifier sm, unsigned tq, |
3091 | SourceRange brackets); |
3092 | |
3093 | public: |
3094 | friend class StmtIteratorBase; |
3095 | |
3096 | Expr *getSizeExpr() const { |
3097 | // We use C-style casts instead of cast<> here because we do not wish |
3098 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3099 | return (Expr*) SizeExpr; |
3100 | } |
3101 | |
3102 | SourceRange getBracketsRange() const { return Brackets; } |
3103 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3104 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3105 | |
3106 | bool isSugared() const { return false; } |
3107 | QualType desugar() const { return QualType(this, 0); } |
3108 | |
3109 | static bool classof(const Type *T) { |
3110 | return T->getTypeClass() == DependentSizedArray; |
3111 | } |
3112 | |
3113 | void Profile(llvm::FoldingSetNodeID &ID) { |
3114 | Profile(ID, Context, getElementType(), |
3115 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); |
3116 | } |
3117 | |
3118 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3119 | QualType ET, ArraySizeModifier SizeMod, |
3120 | unsigned TypeQuals, Expr *E); |
3121 | }; |
3122 | |
3123 | /// Represents an extended address space qualifier where the input address space |
3124 | /// value is dependent. Non-dependent address spaces are not represented with a |
3125 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. |
3126 | /// |
3127 | /// For example: |
3128 | /// \code |
3129 | /// template<typename T, int AddrSpace> |
3130 | /// class AddressSpace { |
3131 | /// typedef T __attribute__((address_space(AddrSpace))) type; |
3132 | /// } |
3133 | /// \endcode |
3134 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { |
3135 | friend class ASTContext; |
3136 | |
3137 | const ASTContext &Context; |
3138 | Expr *AddrSpaceExpr; |
3139 | QualType PointeeType; |
3140 | SourceLocation loc; |
3141 | |
3142 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, |
3143 | QualType can, Expr *AddrSpaceExpr, |
3144 | SourceLocation loc); |
3145 | |
3146 | public: |
3147 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } |
3148 | QualType getPointeeType() const { return PointeeType; } |
3149 | SourceLocation getAttributeLoc() const { return loc; } |
3150 | |
3151 | bool isSugared() const { return false; } |
3152 | QualType desugar() const { return QualType(this, 0); } |
3153 | |
3154 | static bool classof(const Type *T) { |
3155 | return T->getTypeClass() == DependentAddressSpace; |
3156 | } |
3157 | |
3158 | void Profile(llvm::FoldingSetNodeID &ID) { |
3159 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); |
3160 | } |
3161 | |
3162 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3163 | QualType PointeeType, Expr *AddrSpaceExpr); |
3164 | }; |
3165 | |
3166 | /// Represents an extended vector type where either the type or size is |
3167 | /// dependent. |
3168 | /// |
3169 | /// For example: |
3170 | /// \code |
3171 | /// template<typename T, int Size> |
3172 | /// class vector { |
3173 | /// typedef T __attribute__((ext_vector_type(Size))) type; |
3174 | /// } |
3175 | /// \endcode |
3176 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { |
3177 | friend class ASTContext; |
3178 | |
3179 | const ASTContext &Context; |
3180 | Expr *SizeExpr; |
3181 | |
3182 | /// The element type of the array. |
3183 | QualType ElementType; |
3184 | |
3185 | SourceLocation loc; |
3186 | |
3187 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, |
3188 | QualType can, Expr *SizeExpr, SourceLocation loc); |
3189 | |
3190 | public: |
3191 | Expr *getSizeExpr() const { return SizeExpr; } |
3192 | QualType getElementType() const { return ElementType; } |
3193 | SourceLocation getAttributeLoc() const { return loc; } |
3194 | |
3195 | bool isSugared() const { return false; } |
3196 | QualType desugar() const { return QualType(this, 0); } |
3197 | |
3198 | static bool classof(const Type *T) { |
3199 | return T->getTypeClass() == DependentSizedExtVector; |
3200 | } |
3201 | |
3202 | void Profile(llvm::FoldingSetNodeID &ID) { |
3203 | Profile(ID, Context, getElementType(), getSizeExpr()); |
3204 | } |
3205 | |
3206 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3207 | QualType ElementType, Expr *SizeExpr); |
3208 | }; |
3209 | |
3210 | |
3211 | /// Represents a GCC generic vector type. This type is created using |
3212 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in |
3213 | /// bytes; or from an Altivec __vector or vector declaration. |
3214 | /// Since the constructor takes the number of vector elements, the |
3215 | /// client is responsible for converting the size into the number of elements. |
3216 | class VectorType : public Type, public llvm::FoldingSetNode { |
3217 | public: |
3218 | enum VectorKind { |
3219 | /// not a target-specific vector type |
3220 | GenericVector, |
3221 | |
3222 | /// is AltiVec vector |
3223 | AltiVecVector, |
3224 | |
3225 | /// is AltiVec 'vector Pixel' |
3226 | AltiVecPixel, |
3227 | |
3228 | /// is AltiVec 'vector bool ...' |
3229 | AltiVecBool, |
3230 | |
3231 | /// is ARM Neon vector |
3232 | NeonVector, |
3233 | |
3234 | /// is ARM Neon polynomial vector |
3235 | NeonPolyVector, |
3236 | |
3237 | /// is AArch64 SVE fixed-length data vector |
3238 | SveFixedLengthDataVector, |
3239 | |
3240 | /// is AArch64 SVE fixed-length predicate vector |
3241 | SveFixedLengthPredicateVector |
3242 | }; |
3243 | |
3244 | protected: |
3245 | friend class ASTContext; // ASTContext creates these. |
3246 | |
3247 | /// The element type of the vector. |
3248 | QualType ElementType; |
3249 | |
3250 | VectorType(QualType vecType, unsigned nElements, QualType canonType, |
3251 | VectorKind vecKind); |
3252 | |
3253 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, |
3254 | QualType canonType, VectorKind vecKind); |
3255 | |
3256 | public: |
3257 | QualType getElementType() const { return ElementType; } |
3258 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } |
3259 | |
3260 | bool isSugared() const { return false; } |
3261 | QualType desugar() const { return QualType(this, 0); } |
3262 | |
3263 | VectorKind getVectorKind() const { |
3264 | return VectorKind(VectorTypeBits.VecKind); |
3265 | } |
3266 | |
3267 | void Profile(llvm::FoldingSetNodeID &ID) { |
3268 | Profile(ID, getElementType(), getNumElements(), |
3269 | getTypeClass(), getVectorKind()); |
3270 | } |
3271 | |
3272 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3273 | unsigned NumElements, TypeClass TypeClass, |
3274 | VectorKind VecKind) { |
3275 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3276 | ID.AddInteger(NumElements); |
3277 | ID.AddInteger(TypeClass); |
3278 | ID.AddInteger(VecKind); |
3279 | } |
3280 | |
3281 | static bool classof(const Type *T) { |
3282 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; |
3283 | } |
3284 | }; |
3285 | |
3286 | /// Represents a vector type where either the type or size is dependent. |
3287 | //// |
3288 | /// For example: |
3289 | /// \code |
3290 | /// template<typename T, int Size> |
3291 | /// class vector { |
3292 | /// typedef T __attribute__((vector_size(Size))) type; |
3293 | /// } |
3294 | /// \endcode |
3295 | class DependentVectorType : public Type, public llvm::FoldingSetNode { |
3296 | friend class ASTContext; |
3297 | |
3298 | const ASTContext &Context; |
3299 | QualType ElementType; |
3300 | Expr *SizeExpr; |
3301 | SourceLocation Loc; |
3302 | |
3303 | DependentVectorType(const ASTContext &Context, QualType ElementType, |
3304 | QualType CanonType, Expr *SizeExpr, |
3305 | SourceLocation Loc, VectorType::VectorKind vecKind); |
3306 | |
3307 | public: |
3308 | Expr *getSizeExpr() const { return SizeExpr; } |
3309 | QualType getElementType() const { return ElementType; } |
3310 | SourceLocation getAttributeLoc() const { return Loc; } |
3311 | VectorType::VectorKind getVectorKind() const { |
3312 | return VectorType::VectorKind(VectorTypeBits.VecKind); |
3313 | } |
3314 | |
3315 | bool isSugared() const { return false; } |
3316 | QualType desugar() const { return QualType(this, 0); } |
3317 | |
3318 | static bool classof(const Type *T) { |
3319 | return T->getTypeClass() == DependentVector; |
3320 | } |
3321 | |
3322 | void Profile(llvm::FoldingSetNodeID &ID) { |
3323 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); |
3324 | } |
3325 | |
3326 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3327 | QualType ElementType, const Expr *SizeExpr, |
3328 | VectorType::VectorKind VecKind); |
3329 | }; |
3330 | |
3331 | /// ExtVectorType - Extended vector type. This type is created using |
3332 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. |
3333 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This |
3334 | /// class enables syntactic extensions, like Vector Components for accessing |
3335 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL |
3336 | /// Shading Language). |
3337 | class ExtVectorType : public VectorType { |
3338 | friend class ASTContext; // ASTContext creates these. |
3339 | |
3340 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) |
3341 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} |
3342 | |
3343 | public: |
3344 | static int getPointAccessorIdx(char c) { |
3345 | switch (c) { |
3346 | default: return -1; |
3347 | case 'x': case 'r': return 0; |
3348 | case 'y': case 'g': return 1; |
3349 | case 'z': case 'b': return 2; |
3350 | case 'w': case 'a': return 3; |
3351 | } |
3352 | } |
3353 | |
3354 | static int getNumericAccessorIdx(char c) { |
3355 | switch (c) { |
3356 | default: return -1; |
3357 | case '0': return 0; |
3358 | case '1': return 1; |
3359 | case '2': return 2; |
3360 | case '3': return 3; |
3361 | case '4': return 4; |
3362 | case '5': return 5; |
3363 | case '6': return 6; |
3364 | case '7': return 7; |
3365 | case '8': return 8; |
3366 | case '9': return 9; |
3367 | case 'A': |
3368 | case 'a': return 10; |
3369 | case 'B': |
3370 | case 'b': return 11; |
3371 | case 'C': |
3372 | case 'c': return 12; |
3373 | case 'D': |
3374 | case 'd': return 13; |
3375 | case 'E': |
3376 | case 'e': return 14; |
3377 | case 'F': |
3378 | case 'f': return 15; |
3379 | } |
3380 | } |
3381 | |
3382 | static int getAccessorIdx(char c, bool isNumericAccessor) { |
3383 | if (isNumericAccessor) |
3384 | return getNumericAccessorIdx(c); |
3385 | else |
3386 | return getPointAccessorIdx(c); |
3387 | } |
3388 | |
3389 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { |
3390 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) |
3391 | return unsigned(idx-1) < getNumElements(); |
3392 | return false; |
3393 | } |
3394 | |
3395 | bool isSugared() const { return false; } |
3396 | QualType desugar() const { return QualType(this, 0); } |
3397 | |
3398 | static bool classof(const Type *T) { |
3399 | return T->getTypeClass() == ExtVector; |
3400 | } |
3401 | }; |
3402 | |
3403 | /// Represents a matrix type, as defined in the Matrix Types clang extensions. |
3404 | /// __attribute__((matrix_type(rows, columns))), where "rows" specifies |
3405 | /// number of rows and "columns" specifies the number of columns. |
3406 | class MatrixType : public Type, public llvm::FoldingSetNode { |
3407 | protected: |
3408 | friend class ASTContext; |
3409 | |
3410 | /// The element type of the matrix. |
3411 | QualType ElementType; |
3412 | |
3413 | MatrixType(QualType ElementTy, QualType CanonElementTy); |
3414 | |
3415 | MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy, |
3416 | const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr); |
3417 | |
3418 | public: |
3419 | /// Returns type of the elements being stored in the matrix |
3420 | QualType getElementType() const { return ElementType; } |
3421 | |
3422 | /// Valid elements types are the following: |
3423 | /// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types |
3424 | /// and _Bool |
3425 | /// * the standard floating types float or double |
3426 | /// * a half-precision floating point type, if one is supported on the target |
3427 | static bool isValidElementType(QualType T) { |
3428 | return T->isDependentType() || |
3429 | (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType()); |
3430 | } |
3431 | |
3432 | bool isSugared() const { return false; } |
3433 | QualType desugar() const { return QualType(this, 0); } |
3434 | |
3435 | static bool classof(const Type *T) { |
3436 | return T->getTypeClass() == ConstantMatrix || |
3437 | T->getTypeClass() == DependentSizedMatrix; |
3438 | } |
3439 | }; |
3440 | |
3441 | /// Represents a concrete matrix type with constant number of rows and columns |
3442 | class ConstantMatrixType final : public MatrixType { |
3443 | protected: |
3444 | friend class ASTContext; |
3445 | |
3446 | /// The element type of the matrix. |
3447 | // FIXME: Appears to be unused? There is also MatrixType::ElementType... |
3448 | QualType ElementType; |
3449 | |
3450 | /// Number of rows and columns. |
3451 | unsigned NumRows; |
3452 | unsigned NumColumns; |
3453 | |
3454 | static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1; |
3455 | |
3456 | ConstantMatrixType(QualType MatrixElementType, unsigned NRows, |
3457 | unsigned NColumns, QualType CanonElementType); |
3458 | |
3459 | ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows, |
3460 | unsigned NColumns, QualType CanonElementType); |
3461 | |
3462 | public: |
3463 | /// Returns the number of rows in the matrix. |
3464 | unsigned getNumRows() const { return NumRows; } |
3465 | |
3466 | /// Returns the number of columns in the matrix. |
3467 | unsigned getNumColumns() const { return NumColumns; } |
3468 | |
3469 | /// Returns the number of elements required to embed the matrix into a vector. |
3470 | unsigned getNumElementsFlattened() const { |
3471 | return getNumRows() * getNumColumns(); |
3472 | } |
3473 | |
3474 | /// Returns true if \p NumElements is a valid matrix dimension. |
3475 | static constexpr bool isDimensionValid(size_t NumElements) { |
3476 | return NumElements > 0 && NumElements <= MaxElementsPerDimension; |
3477 | } |
3478 | |
3479 | /// Returns the maximum number of elements per dimension. |
3480 | static constexpr unsigned getMaxElementsPerDimension() { |
3481 | return MaxElementsPerDimension; |
3482 | } |
3483 | |
3484 | void Profile(llvm::FoldingSetNodeID &ID) { |
3485 | Profile(ID, getElementType(), getNumRows(), getNumColumns(), |
3486 | getTypeClass()); |
3487 | } |
3488 | |
3489 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3490 | unsigned NumRows, unsigned NumColumns, |
3491 | TypeClass TypeClass) { |
3492 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3493 | ID.AddInteger(NumRows); |
3494 | ID.AddInteger(NumColumns); |
3495 | ID.AddInteger(TypeClass); |
3496 | } |
3497 | |
3498 | static bool classof(const Type *T) { |
3499 | return T->getTypeClass() == ConstantMatrix; |
3500 | } |
3501 | }; |
3502 | |
3503 | /// Represents a matrix type where the type and the number of rows and columns |
3504 | /// is dependent on a template. |
3505 | class DependentSizedMatrixType final : public MatrixType { |
3506 | friend class ASTContext; |
3507 | |
3508 | const ASTContext &Context; |
3509 | Expr *RowExpr; |
3510 | Expr *ColumnExpr; |
3511 | |
3512 | SourceLocation loc; |
3513 | |
3514 | DependentSizedMatrixType(const ASTContext &Context, QualType ElementType, |
3515 | QualType CanonicalType, Expr *RowExpr, |
3516 | Expr *ColumnExpr, SourceLocation loc); |
3517 | |
3518 | public: |
3519 | QualType getElementType() const { return ElementType; } |
3520 | Expr *getRowExpr() const { return RowExpr; } |
3521 | Expr *getColumnExpr() const { return ColumnExpr; } |
3522 | SourceLocation getAttributeLoc() const { return loc; } |
3523 | |
3524 | bool isSugared() const { return false; } |
3525 | QualType desugar() const { return QualType(this, 0); } |
3526 | |
3527 | static bool classof(const Type *T) { |
3528 | return T->getTypeClass() == DependentSizedMatrix; |
3529 | } |
3530 | |
3531 | void Profile(llvm::FoldingSetNodeID &ID) { |
3532 | Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr()); |
3533 | } |
3534 | |
3535 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3536 | QualType ElementType, Expr *RowExpr, Expr *ColumnExpr); |
3537 | }; |
3538 | |
3539 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base |
3540 | /// class of FunctionNoProtoType and FunctionProtoType. |
3541 | class FunctionType : public Type { |
3542 | // The type returned by the function. |
3543 | QualType ResultType; |
3544 | |
3545 | public: |
3546 | /// Interesting information about a specific parameter that can't simply |
3547 | /// be reflected in parameter's type. This is only used by FunctionProtoType |
3548 | /// but is in FunctionType to make this class available during the |
3549 | /// specification of the bases of FunctionProtoType. |
3550 | /// |
3551 | /// It makes sense to model language features this way when there's some |
3552 | /// sort of parameter-specific override (such as an attribute) that |
3553 | /// affects how the function is called. For example, the ARC ns_consumed |
3554 | /// attribute changes whether a parameter is passed at +0 (the default) |
3555 | /// or +1 (ns_consumed). This must be reflected in the function type, |
3556 | /// but isn't really a change to the parameter type. |
3557 | /// |
3558 | /// One serious disadvantage of modelling language features this way is |
3559 | /// that they generally do not work with language features that attempt |
3560 | /// to destructure types. For example, template argument deduction will |
3561 | /// not be able to match a parameter declared as |
3562 | /// T (*)(U) |
3563 | /// against an argument of type |
3564 | /// void (*)(__attribute__((ns_consumed)) id) |
3565 | /// because the substitution of T=void, U=id into the former will |
3566 | /// not produce the latter. |
3567 | class ExtParameterInfo { |
3568 | enum { |
3569 | ABIMask = 0x0F, |
3570 | IsConsumed = 0x10, |
3571 | HasPassObjSize = 0x20, |
3572 | IsNoEscape = 0x40, |
3573 | }; |
3574 | unsigned char Data = 0; |
3575 | |
3576 | public: |
3577 | ExtParameterInfo() = default; |
3578 | |
3579 | /// Return the ABI treatment of this parameter. |
3580 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } |
3581 | ExtParameterInfo withABI(ParameterABI kind) const { |
3582 | ExtParameterInfo copy = *this; |
3583 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); |
3584 | return copy; |
3585 | } |
3586 | |
3587 | /// Is this parameter considered "consumed" by Objective-C ARC? |
3588 | /// Consumed parameters must have retainable object type. |
3589 | bool isConsumed() const { return (Data & IsConsumed); } |
3590 | ExtParameterInfo withIsConsumed(bool consumed) const { |
3591 | ExtParameterInfo copy = *this; |
3592 | if (consumed) |
3593 | copy.Data |= IsConsumed; |
3594 | else |
3595 | copy.Data &= ~IsConsumed; |
3596 | return copy; |
3597 | } |
3598 | |
3599 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } |
3600 | ExtParameterInfo withHasPassObjectSize() const { |
3601 | ExtParameterInfo Copy = *this; |
3602 | Copy.Data |= HasPassObjSize; |
3603 | return Copy; |
3604 | } |
3605 | |
3606 | bool isNoEscape() const { return Data & IsNoEscape; } |
3607 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { |
3608 | ExtParameterInfo Copy = *this; |
3609 | if (NoEscape) |
3610 | Copy.Data |= IsNoEscape; |
3611 | else |
3612 | Copy.Data &= ~IsNoEscape; |
3613 | return Copy; |
3614 | } |
3615 | |
3616 | unsigned char getOpaqueValue() const { return Data; } |
3617 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { |
3618 | ExtParameterInfo result; |
3619 | result.Data = data; |
3620 | return result; |
3621 | } |
3622 | |
3623 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3624 | return lhs.Data == rhs.Data; |
3625 | } |
3626 | |
3627 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3628 | return lhs.Data != rhs.Data; |
3629 | } |
3630 | }; |
3631 | |
3632 | /// A class which abstracts out some details necessary for |
3633 | /// making a call. |
3634 | /// |
3635 | /// It is not actually used directly for storing this information in |
3636 | /// a FunctionType, although FunctionType does currently use the |
3637 | /// same bit-pattern. |
3638 | /// |
3639 | // If you add a field (say Foo), other than the obvious places (both, |
3640 | // constructors, compile failures), what you need to update is |
3641 | // * Operator== |
3642 | // * getFoo |
3643 | // * withFoo |
3644 | // * functionType. Add Foo, getFoo. |
3645 | // * ASTContext::getFooType |
3646 | // * ASTContext::mergeFunctionTypes |
3647 | // * FunctionNoProtoType::Profile |
3648 | // * FunctionProtoType::Profile |
3649 | // * TypePrinter::PrintFunctionProto |
3650 | // * AST read and write |
3651 | // * Codegen |
3652 | class ExtInfo { |
3653 | friend class FunctionType; |
3654 | |
3655 | // Feel free to rearrange or add bits, but if you go over 16, you'll need to |
3656 | // adjust the Bits field below, and if you add bits, you'll need to adjust |
3657 | // Type::FunctionTypeBitfields::ExtInfo as well. |
3658 | |
3659 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall| |
3660 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | 12 | |
3661 | // |
3662 | // regparm is either 0 (no regparm attribute) or the regparm value+1. |
3663 | enum { CallConvMask = 0x1F }; |
3664 | enum { NoReturnMask = 0x20 }; |
3665 | enum { ProducesResultMask = 0x40 }; |
3666 | enum { NoCallerSavedRegsMask = 0x80 }; |
3667 | enum { |
3668 | RegParmMask = 0x700, |
3669 | RegParmOffset = 8 |
3670 | }; |
3671 | enum { NoCfCheckMask = 0x800 }; |
3672 | enum { CmseNSCallMask = 0x1000 }; |
3673 | uint16_t Bits = CC_C; |
3674 | |
3675 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} |
3676 | |
3677 | public: |
3678 | // Constructor with no defaults. Use this when you know that you |
3679 | // have all the elements (when reading an AST file for example). |
3680 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, |
3681 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck, |
3682 | bool cmseNSCall) { |
3683 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value" ) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 3683, __PRETTY_FUNCTION__)); |
3684 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | |
3685 | (producesResult ? ProducesResultMask : 0) | |
3686 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | |
3687 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | |
3688 | (NoCfCheck ? NoCfCheckMask : 0) | |
3689 | (cmseNSCall ? CmseNSCallMask : 0); |
3690 | } |
3691 | |
3692 | // Constructor with all defaults. Use when for example creating a |
3693 | // function known to use defaults. |
3694 | ExtInfo() = default; |
3695 | |
3696 | // Constructor with just the calling convention, which is an important part |
3697 | // of the canonical type. |
3698 | ExtInfo(CallingConv CC) : Bits(CC) {} |
3699 | |
3700 | bool getNoReturn() const { return Bits & NoReturnMask; } |
3701 | bool getProducesResult() const { return Bits & ProducesResultMask; } |
3702 | bool getCmseNSCall() const { return Bits & CmseNSCallMask; } |
3703 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } |
3704 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } |
3705 | bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; } |
3706 | |
3707 | unsigned getRegParm() const { |
3708 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; |
3709 | if (RegParm > 0) |
3710 | --RegParm; |
3711 | return RegParm; |
3712 | } |
3713 | |
3714 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } |
3715 | |
3716 | bool operator==(ExtInfo Other) const { |
3717 | return Bits == Other.Bits; |
3718 | } |
3719 | bool operator!=(ExtInfo Other) const { |
3720 | return Bits != Other.Bits; |
3721 | } |
3722 | |
3723 | // Note that we don't have setters. That is by design, use |
3724 | // the following with methods instead of mutating these objects. |
3725 | |
3726 | ExtInfo withNoReturn(bool noReturn) const { |
3727 | if (noReturn) |
3728 | return ExtInfo(Bits | NoReturnMask); |
3729 | else |
3730 | return ExtInfo(Bits & ~NoReturnMask); |
3731 | } |
3732 | |
3733 | ExtInfo withProducesResult(bool producesResult) const { |
3734 | if (producesResult) |
3735 | return ExtInfo(Bits | ProducesResultMask); |
3736 | else |
3737 | return ExtInfo(Bits & ~ProducesResultMask); |
3738 | } |
3739 | |
3740 | ExtInfo withCmseNSCall(bool cmseNSCall) const { |
3741 | if (cmseNSCall) |
3742 | return ExtInfo(Bits | CmseNSCallMask); |
3743 | else |
3744 | return ExtInfo(Bits & ~CmseNSCallMask); |
3745 | } |
3746 | |
3747 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { |
3748 | if (noCallerSavedRegs) |
3749 | return ExtInfo(Bits | NoCallerSavedRegsMask); |
3750 | else |
3751 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); |
3752 | } |
3753 | |
3754 | ExtInfo withNoCfCheck(bool noCfCheck) const { |
3755 | if (noCfCheck) |
3756 | return ExtInfo(Bits | NoCfCheckMask); |
3757 | else |
3758 | return ExtInfo(Bits & ~NoCfCheckMask); |
3759 | } |
3760 | |
3761 | ExtInfo withRegParm(unsigned RegParm) const { |
3762 | assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast <void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 3762, __PRETTY_FUNCTION__)); |
3763 | return ExtInfo((Bits & ~RegParmMask) | |
3764 | ((RegParm + 1) << RegParmOffset)); |
3765 | } |
3766 | |
3767 | ExtInfo withCallingConv(CallingConv cc) const { |
3768 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); |
3769 | } |
3770 | |
3771 | void Profile(llvm::FoldingSetNodeID &ID) const { |
3772 | ID.AddInteger(Bits); |
3773 | } |
3774 | }; |
3775 | |
3776 | /// A simple holder for a QualType representing a type in an |
3777 | /// exception specification. Unfortunately needed by FunctionProtoType |
3778 | /// because TrailingObjects cannot handle repeated types. |
3779 | struct ExceptionType { QualType Type; }; |
3780 | |
3781 | /// A simple holder for various uncommon bits which do not fit in |
3782 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the |
3783 | /// alignment of subsequent objects in TrailingObjects. You must update |
3784 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. |
3785 | struct alignas(void *) FunctionTypeExtraBitfields { |
3786 | /// The number of types in the exception specification. |
3787 | /// A whole unsigned is not needed here and according to |
3788 | /// [implimits] 8 bits would be enough here. |
3789 | unsigned NumExceptionType; |
3790 | }; |
3791 | |
3792 | protected: |
3793 | FunctionType(TypeClass tc, QualType res, QualType Canonical, |
3794 | TypeDependence Dependence, ExtInfo Info) |
3795 | : Type(tc, Canonical, Dependence), ResultType(res) { |
3796 | FunctionTypeBits.ExtInfo = Info.Bits; |
3797 | } |
3798 | |
3799 | Qualifiers getFastTypeQuals() const { |
3800 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); |
3801 | } |
3802 | |
3803 | public: |
3804 | QualType getReturnType() const { return ResultType; } |
3805 | |
3806 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } |
3807 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } |
3808 | |
3809 | /// Determine whether this function type includes the GNU noreturn |
3810 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function |
3811 | /// type. |
3812 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } |
3813 | |
3814 | bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); } |
3815 | CallingConv getCallConv() const { return getExtInfo().getCC(); } |
3816 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } |
3817 | |
3818 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, |
3819 | "Const, volatile and restrict are assumed to be a subset of " |
3820 | "the fast qualifiers."); |
3821 | |
3822 | bool isConst() const { return getFastTypeQuals().hasConst(); } |
3823 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } |
3824 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } |
3825 | |
3826 | /// Determine the type of an expression that calls a function of |
3827 | /// this type. |
3828 | QualType getCallResultType(const ASTContext &Context) const { |
3829 | return getReturnType().getNonLValueExprType(Context); |
3830 | } |
3831 | |
3832 | static StringRef getNameForCallConv(CallingConv CC); |
3833 | |
3834 | static bool classof(const Type *T) { |
3835 | return T->getTypeClass() == FunctionNoProto || |
3836 | T->getTypeClass() == FunctionProto; |
3837 | } |
3838 | }; |
3839 | |
3840 | /// Represents a K&R-style 'int foo()' function, which has |
3841 | /// no information available about its arguments. |
3842 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { |
3843 | friend class ASTContext; // ASTContext creates these. |
3844 | |
3845 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) |
3846 | : FunctionType(FunctionNoProto, Result, Canonical, |
3847 | Result->getDependence() & |
3848 | ~(TypeDependence::DependentInstantiation | |
3849 | TypeDependence::UnexpandedPack), |
3850 | Info) {} |
3851 | |
3852 | public: |
3853 | // No additional state past what FunctionType provides. |
3854 | |
3855 | bool isSugared() const { return false; } |
3856 | QualType desugar() const { return QualType(this, 0); } |
3857 | |
3858 | void Profile(llvm::FoldingSetNodeID &ID) { |
3859 | Profile(ID, getReturnType(), getExtInfo()); |
3860 | } |
3861 | |
3862 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, |
3863 | ExtInfo Info) { |
3864 | Info.Profile(ID); |
3865 | ID.AddPointer(ResultType.getAsOpaquePtr()); |
3866 | } |
3867 | |
3868 | static bool classof(const Type *T) { |
3869 | return T->getTypeClass() == FunctionNoProto; |
3870 | } |
3871 | }; |
3872 | |
3873 | /// Represents a prototype with parameter type info, e.g. |
3874 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no |
3875 | /// parameters, not as having a single void parameter. Such a type can have |
3876 | /// an exception specification, but this specification is not part of the |
3877 | /// canonical type. FunctionProtoType has several trailing objects, some of |
3878 | /// which optional. For more information about the trailing objects see |
3879 | /// the first comment inside FunctionProtoType. |
3880 | class FunctionProtoType final |
3881 | : public FunctionType, |
3882 | public llvm::FoldingSetNode, |
3883 | private llvm::TrailingObjects< |
3884 | FunctionProtoType, QualType, SourceLocation, |
3885 | FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType, |
3886 | Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> { |
3887 | friend class ASTContext; // ASTContext creates these. |
3888 | friend TrailingObjects; |
3889 | |
3890 | // FunctionProtoType is followed by several trailing objects, some of |
3891 | // which optional. They are in order: |
3892 | // |
3893 | // * An array of getNumParams() QualType holding the parameter types. |
3894 | // Always present. Note that for the vast majority of FunctionProtoType, |
3895 | // these will be the only trailing objects. |
3896 | // |
3897 | // * Optionally if the function is variadic, the SourceLocation of the |
3898 | // ellipsis. |
3899 | // |
3900 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields |
3901 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): |
3902 | // a single FunctionTypeExtraBitfields. Present if and only if |
3903 | // hasExtraBitfields() is true. |
3904 | // |
3905 | // * Optionally exactly one of: |
3906 | // * an array of getNumExceptions() ExceptionType, |
3907 | // * a single Expr *, |
3908 | // * a pair of FunctionDecl *, |
3909 | // * a single FunctionDecl * |
3910 | // used to store information about the various types of exception |
3911 | // specification. See getExceptionSpecSize for the details. |
3912 | // |
3913 | // * Optionally an array of getNumParams() ExtParameterInfo holding |
3914 | // an ExtParameterInfo for each of the parameters. Present if and |
3915 | // only if hasExtParameterInfos() is true. |
3916 | // |
3917 | // * Optionally a Qualifiers object to represent extra qualifiers that can't |
3918 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only |
3919 | // if hasExtQualifiers() is true. |
3920 | // |
3921 | // The optional FunctionTypeExtraBitfields has to be before the data |
3922 | // related to the exception specification since it contains the number |
3923 | // of exception types. |
3924 | // |
3925 | // We put the ExtParameterInfos last. If all were equal, it would make |
3926 | // more sense to put these before the exception specification, because |
3927 | // it's much easier to skip past them compared to the elaborate switch |
3928 | // required to skip the exception specification. However, all is not |
3929 | // equal; ExtParameterInfos are used to model very uncommon features, |
3930 | // and it's better not to burden the more common paths. |
3931 | |
3932 | public: |
3933 | /// Holds information about the various types of exception specification. |
3934 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is |
3935 | /// used to group together the various bits of information about the |
3936 | /// exception specification. |
3937 | struct ExceptionSpecInfo { |
3938 | /// The kind of exception specification this is. |
3939 | ExceptionSpecificationType Type = EST_None; |
3940 | |
3941 | /// Explicitly-specified list of exception types. |
3942 | ArrayRef<QualType> Exceptions; |
3943 | |
3944 | /// Noexcept expression, if this is a computed noexcept specification. |
3945 | Expr *NoexceptExpr = nullptr; |
3946 | |
3947 | /// The function whose exception specification this is, for |
3948 | /// EST_Unevaluated and EST_Uninstantiated. |
3949 | FunctionDecl *SourceDecl = nullptr; |
3950 | |
3951 | /// The function template whose exception specification this is instantiated |
3952 | /// from, for EST_Uninstantiated. |
3953 | FunctionDecl *SourceTemplate = nullptr; |
3954 | |
3955 | ExceptionSpecInfo() = default; |
3956 | |
3957 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} |
3958 | }; |
3959 | |
3960 | /// Extra information about a function prototype. ExtProtoInfo is not |
3961 | /// stored as such in FunctionProtoType but is used to group together |
3962 | /// the various bits of extra information about a function prototype. |
3963 | struct ExtProtoInfo { |
3964 | FunctionType::ExtInfo ExtInfo; |
3965 | bool Variadic : 1; |
3966 | bool HasTrailingReturn : 1; |
3967 | Qualifiers TypeQuals; |
3968 | RefQualifierKind RefQualifier = RQ_None; |
3969 | ExceptionSpecInfo ExceptionSpec; |
3970 | const ExtParameterInfo *ExtParameterInfos = nullptr; |
3971 | SourceLocation EllipsisLoc; |
3972 | |
3973 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} |
3974 | |
3975 | ExtProtoInfo(CallingConv CC) |
3976 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} |
3977 | |
3978 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { |
3979 | ExtProtoInfo Result(*this); |
3980 | Result.ExceptionSpec = ESI; |
3981 | return Result; |
3982 | } |
3983 | }; |
3984 | |
3985 | private: |
3986 | unsigned numTrailingObjects(OverloadToken<QualType>) const { |
3987 | return getNumParams(); |
3988 | } |
3989 | |
3990 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { |
3991 | return isVariadic(); |
3992 | } |
3993 | |
3994 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { |
3995 | return hasExtraBitfields(); |
3996 | } |
3997 | |
3998 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { |
3999 | return getExceptionSpecSize().NumExceptionType; |
4000 | } |
4001 | |
4002 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { |
4003 | return getExceptionSpecSize().NumExprPtr; |
4004 | } |
4005 | |
4006 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { |
4007 | return getExceptionSpecSize().NumFunctionDeclPtr; |
4008 | } |
4009 | |
4010 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { |
4011 | return hasExtParameterInfos() ? getNumParams() : 0; |
4012 | } |
4013 | |
4014 | /// Determine whether there are any argument types that |
4015 | /// contain an unexpanded parameter pack. |
4016 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, |
4017 | unsigned numArgs) { |
4018 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) |
4019 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) |
4020 | return true; |
4021 | |
4022 | return false; |
4023 | } |
4024 | |
4025 | FunctionProtoType(QualType result, ArrayRef<QualType> params, |
4026 | QualType canonical, const ExtProtoInfo &epi); |
4027 | |
4028 | /// This struct is returned by getExceptionSpecSize and is used to |
4029 | /// translate an ExceptionSpecificationType to the number and kind |
4030 | /// of trailing objects related to the exception specification. |
4031 | struct ExceptionSpecSizeHolder { |
4032 | unsigned NumExceptionType; |
4033 | unsigned NumExprPtr; |
4034 | unsigned NumFunctionDeclPtr; |
4035 | }; |
4036 | |
4037 | /// Return the number and kind of trailing objects |
4038 | /// related to the exception specification. |
4039 | static ExceptionSpecSizeHolder |
4040 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { |
4041 | switch (EST) { |
4042 | case EST_None: |
4043 | case EST_DynamicNone: |
4044 | case EST_MSAny: |
4045 | case EST_BasicNoexcept: |
4046 | case EST_Unparsed: |
4047 | case EST_NoThrow: |
4048 | return {0, 0, 0}; |
4049 | |
4050 | case EST_Dynamic: |
4051 | return {NumExceptions, 0, 0}; |
4052 | |
4053 | case EST_DependentNoexcept: |
4054 | case EST_NoexceptFalse: |
4055 | case EST_NoexceptTrue: |
4056 | return {0, 1, 0}; |
4057 | |
4058 | case EST_Uninstantiated: |
4059 | return {0, 0, 2}; |
4060 | |
4061 | case EST_Unevaluated: |
4062 | return {0, 0, 1}; |
4063 | } |
4064 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4064); |
4065 | } |
4066 | |
4067 | /// Return the number and kind of trailing objects |
4068 | /// related to the exception specification. |
4069 | ExceptionSpecSizeHolder getExceptionSpecSize() const { |
4070 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); |
4071 | } |
4072 | |
4073 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4074 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { |
4075 | // If the exception spec type is EST_Dynamic then we have > 0 exception |
4076 | // types and the exact number is stored in FunctionTypeExtraBitfields. |
4077 | return EST == EST_Dynamic; |
4078 | } |
4079 | |
4080 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4081 | bool hasExtraBitfields() const { |
4082 | return hasExtraBitfields(getExceptionSpecType()); |
4083 | } |
4084 | |
4085 | bool hasExtQualifiers() const { |
4086 | return FunctionTypeBits.HasExtQuals; |
4087 | } |
4088 | |
4089 | public: |
4090 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } |
4091 | |
4092 | QualType getParamType(unsigned i) const { |
4093 | assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index") ? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4093, __PRETTY_FUNCTION__)); |
4094 | return param_type_begin()[i]; |
4095 | } |
4096 | |
4097 | ArrayRef<QualType> getParamTypes() const { |
4098 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); |
4099 | } |
4100 | |
4101 | ExtProtoInfo getExtProtoInfo() const { |
4102 | ExtProtoInfo EPI; |
4103 | EPI.ExtInfo = getExtInfo(); |
4104 | EPI.Variadic = isVariadic(); |
4105 | EPI.EllipsisLoc = getEllipsisLoc(); |
4106 | EPI.HasTrailingReturn = hasTrailingReturn(); |
4107 | EPI.ExceptionSpec = getExceptionSpecInfo(); |
4108 | EPI.TypeQuals = getMethodQuals(); |
4109 | EPI.RefQualifier = getRefQualifier(); |
4110 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); |
4111 | return EPI; |
4112 | } |
4113 | |
4114 | /// Get the kind of exception specification on this function. |
4115 | ExceptionSpecificationType getExceptionSpecType() const { |
4116 | return static_cast<ExceptionSpecificationType>( |
4117 | FunctionTypeBits.ExceptionSpecType); |
4118 | } |
4119 | |
4120 | /// Return whether this function has any kind of exception spec. |
4121 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } |
4122 | |
4123 | /// Return whether this function has a dynamic (throw) exception spec. |
4124 | bool hasDynamicExceptionSpec() const { |
4125 | return isDynamicExceptionSpec(getExceptionSpecType()); |
4126 | } |
4127 | |
4128 | /// Return whether this function has a noexcept exception spec. |
4129 | bool hasNoexceptExceptionSpec() const { |
4130 | return isNoexceptExceptionSpec(getExceptionSpecType()); |
4131 | } |
4132 | |
4133 | /// Return whether this function has a dependent exception spec. |
4134 | bool hasDependentExceptionSpec() const; |
4135 | |
4136 | /// Return whether this function has an instantiation-dependent exception |
4137 | /// spec. |
4138 | bool hasInstantiationDependentExceptionSpec() const; |
4139 | |
4140 | /// Return all the available information about this type's exception spec. |
4141 | ExceptionSpecInfo getExceptionSpecInfo() const { |
4142 | ExceptionSpecInfo Result; |
4143 | Result.Type = getExceptionSpecType(); |
4144 | if (Result.Type == EST_Dynamic) { |
4145 | Result.Exceptions = exceptions(); |
4146 | } else if (isComputedNoexcept(Result.Type)) { |
4147 | Result.NoexceptExpr = getNoexceptExpr(); |
4148 | } else if (Result.Type == EST_Uninstantiated) { |
4149 | Result.SourceDecl = getExceptionSpecDecl(); |
4150 | Result.SourceTemplate = getExceptionSpecTemplate(); |
4151 | } else if (Result.Type == EST_Unevaluated) { |
4152 | Result.SourceDecl = getExceptionSpecDecl(); |
4153 | } |
4154 | return Result; |
4155 | } |
4156 | |
4157 | /// Return the number of types in the exception specification. |
4158 | unsigned getNumExceptions() const { |
4159 | return getExceptionSpecType() == EST_Dynamic |
4160 | ? getTrailingObjects<FunctionTypeExtraBitfields>() |
4161 | ->NumExceptionType |
4162 | : 0; |
4163 | } |
4164 | |
4165 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). |
4166 | QualType getExceptionType(unsigned i) const { |
4167 | assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!" ) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4167, __PRETTY_FUNCTION__)); |
4168 | return exception_begin()[i]; |
4169 | } |
4170 | |
4171 | /// Return the expression inside noexcept(expression), or a null pointer |
4172 | /// if there is none (because the exception spec is not of this form). |
4173 | Expr *getNoexceptExpr() const { |
4174 | if (!isComputedNoexcept(getExceptionSpecType())) |
4175 | return nullptr; |
4176 | return *getTrailingObjects<Expr *>(); |
4177 | } |
4178 | |
4179 | /// If this function type has an exception specification which hasn't |
4180 | /// been determined yet (either because it has not been evaluated or because |
4181 | /// it has not been instantiated), this is the function whose exception |
4182 | /// specification is represented by this type. |
4183 | FunctionDecl *getExceptionSpecDecl() const { |
4184 | if (getExceptionSpecType() != EST_Uninstantiated && |
4185 | getExceptionSpecType() != EST_Unevaluated) |
4186 | return nullptr; |
4187 | return getTrailingObjects<FunctionDecl *>()[0]; |
4188 | } |
4189 | |
4190 | /// If this function type has an uninstantiated exception |
4191 | /// specification, this is the function whose exception specification |
4192 | /// should be instantiated to find the exception specification for |
4193 | /// this type. |
4194 | FunctionDecl *getExceptionSpecTemplate() const { |
4195 | if (getExceptionSpecType() != EST_Uninstantiated) |
4196 | return nullptr; |
4197 | return getTrailingObjects<FunctionDecl *>()[1]; |
4198 | } |
4199 | |
4200 | /// Determine whether this function type has a non-throwing exception |
4201 | /// specification. |
4202 | CanThrowResult canThrow() const; |
4203 | |
4204 | /// Determine whether this function type has a non-throwing exception |
4205 | /// specification. If this depends on template arguments, returns |
4206 | /// \c ResultIfDependent. |
4207 | bool isNothrow(bool ResultIfDependent = false) const { |
4208 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; |
4209 | } |
4210 | |
4211 | /// Whether this function prototype is variadic. |
4212 | bool isVariadic() const { return FunctionTypeBits.Variadic; } |
4213 | |
4214 | SourceLocation getEllipsisLoc() const { |
4215 | return isVariadic() ? *getTrailingObjects<SourceLocation>() |
4216 | : SourceLocation(); |
4217 | } |
4218 | |
4219 | /// Determines whether this function prototype contains a |
4220 | /// parameter pack at the end. |
4221 | /// |
4222 | /// A function template whose last parameter is a parameter pack can be |
4223 | /// called with an arbitrary number of arguments, much like a variadic |
4224 | /// function. |
4225 | bool isTemplateVariadic() const; |
4226 | |
4227 | /// Whether this function prototype has a trailing return type. |
4228 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } |
4229 | |
4230 | Qualifiers getMethodQuals() const { |
4231 | if (hasExtQualifiers()) |
4232 | return *getTrailingObjects<Qualifiers>(); |
4233 | else |
4234 | return getFastTypeQuals(); |
4235 | } |
4236 | |
4237 | /// Retrieve the ref-qualifier associated with this function type. |
4238 | RefQualifierKind getRefQualifier() const { |
4239 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); |
4240 | } |
4241 | |
4242 | using param_type_iterator = const QualType *; |
4243 | using param_type_range = llvm::iterator_range<param_type_iterator>; |
4244 | |
4245 | param_type_range param_types() const { |
4246 | return param_type_range(param_type_begin(), param_type_end()); |
4247 | } |
4248 | |
4249 | param_type_iterator param_type_begin() const { |
4250 | return getTrailingObjects<QualType>(); |
4251 | } |
4252 | |
4253 | param_type_iterator param_type_end() const { |
4254 | return param_type_begin() + getNumParams(); |
4255 | } |
4256 | |
4257 | using exception_iterator = const QualType *; |
4258 | |
4259 | ArrayRef<QualType> exceptions() const { |
4260 | return llvm::makeArrayRef(exception_begin(), exception_end()); |
4261 | } |
4262 | |
4263 | exception_iterator exception_begin() const { |
4264 | return reinterpret_cast<exception_iterator>( |
4265 | getTrailingObjects<ExceptionType>()); |
4266 | } |
4267 | |
4268 | exception_iterator exception_end() const { |
4269 | return exception_begin() + getNumExceptions(); |
4270 | } |
4271 | |
4272 | /// Is there any interesting extra information for any of the parameters |
4273 | /// of this function type? |
4274 | bool hasExtParameterInfos() const { |
4275 | return FunctionTypeBits.HasExtParameterInfos; |
4276 | } |
4277 | |
4278 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { |
4279 | assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4279, __PRETTY_FUNCTION__)); |
4280 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), |
4281 | getNumParams()); |
4282 | } |
4283 | |
4284 | /// Return a pointer to the beginning of the array of extra parameter |
4285 | /// information, if present, or else null if none of the parameters |
4286 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. |
4287 | const ExtParameterInfo *getExtParameterInfosOrNull() const { |
4288 | if (!hasExtParameterInfos()) |
4289 | return nullptr; |
4290 | return getTrailingObjects<ExtParameterInfo>(); |
4291 | } |
4292 | |
4293 | ExtParameterInfo getExtParameterInfo(unsigned I) const { |
4294 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4294, __PRETTY_FUNCTION__)); |
4295 | if (hasExtParameterInfos()) |
4296 | return getTrailingObjects<ExtParameterInfo>()[I]; |
4297 | return ExtParameterInfo(); |
4298 | } |
4299 | |
4300 | ParameterABI getParameterABI(unsigned I) const { |
4301 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4301, __PRETTY_FUNCTION__)); |
4302 | if (hasExtParameterInfos()) |
4303 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); |
4304 | return ParameterABI::Ordinary; |
4305 | } |
4306 | |
4307 | bool isParamConsumed(unsigned I) const { |
4308 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4308, __PRETTY_FUNCTION__)); |
4309 | if (hasExtParameterInfos()) |
4310 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); |
4311 | return false; |
4312 | } |
4313 | |
4314 | bool isSugared() const { return false; } |
4315 | QualType desugar() const { return QualType(this, 0); } |
4316 | |
4317 | void printExceptionSpecification(raw_ostream &OS, |
4318 | const PrintingPolicy &Policy) const; |
4319 | |
4320 | static bool classof(const Type *T) { |
4321 | return T->getTypeClass() == FunctionProto; |
4322 | } |
4323 | |
4324 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); |
4325 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, |
4326 | param_type_iterator ArgTys, unsigned NumArgs, |
4327 | const ExtProtoInfo &EPI, const ASTContext &Context, |
4328 | bool Canonical); |
4329 | }; |
4330 | |
4331 | /// Represents the dependent type named by a dependently-scoped |
4332 | /// typename using declaration, e.g. |
4333 | /// using typename Base<T>::foo; |
4334 | /// |
4335 | /// Template instantiation turns these into the underlying type. |
4336 | class UnresolvedUsingType : public Type { |
4337 | friend class ASTContext; // ASTContext creates these. |
4338 | |
4339 | UnresolvedUsingTypenameDecl *Decl; |
4340 | |
4341 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) |
4342 | : Type(UnresolvedUsing, QualType(), |
4343 | TypeDependence::DependentInstantiation), |
4344 | Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {} |
4345 | |
4346 | public: |
4347 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } |
4348 | |
4349 | bool isSugared() const { return false; } |
4350 | QualType desugar() const { return QualType(this, 0); } |
4351 | |
4352 | static bool classof(const Type *T) { |
4353 | return T->getTypeClass() == UnresolvedUsing; |
4354 | } |
4355 | |
4356 | void Profile(llvm::FoldingSetNodeID &ID) { |
4357 | return Profile(ID, Decl); |
4358 | } |
4359 | |
4360 | static void Profile(llvm::FoldingSetNodeID &ID, |
4361 | UnresolvedUsingTypenameDecl *D) { |
4362 | ID.AddPointer(D); |
4363 | } |
4364 | }; |
4365 | |
4366 | class TypedefType : public Type { |
4367 | TypedefNameDecl *Decl; |
4368 | |
4369 | private: |
4370 | friend class ASTContext; // ASTContext creates these. |
4371 | |
4372 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying, |
4373 | QualType can); |
4374 | |
4375 | public: |
4376 | TypedefNameDecl *getDecl() const { return Decl; } |
4377 | |
4378 | bool isSugared() const { return true; } |
4379 | QualType desugar() const; |
4380 | |
4381 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } |
4382 | }; |
4383 | |
4384 | /// Sugar type that represents a type that was qualified by a qualifier written |
4385 | /// as a macro invocation. |
4386 | class MacroQualifiedType : public Type { |
4387 | friend class ASTContext; // ASTContext creates these. |
4388 | |
4389 | QualType UnderlyingTy; |
4390 | const IdentifierInfo *MacroII; |
4391 | |
4392 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, |
4393 | const IdentifierInfo *MacroII) |
4394 | : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()), |
4395 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { |
4396 | assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4397, __PRETTY_FUNCTION__)) |
4397 | "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4397, __PRETTY_FUNCTION__)); |
4398 | } |
4399 | |
4400 | public: |
4401 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } |
4402 | QualType getUnderlyingType() const { return UnderlyingTy; } |
4403 | |
4404 | /// Return this attributed type's modified type with no qualifiers attached to |
4405 | /// it. |
4406 | QualType getModifiedType() const; |
4407 | |
4408 | bool isSugared() const { return true; } |
4409 | QualType desugar() const; |
4410 | |
4411 | static bool classof(const Type *T) { |
4412 | return T->getTypeClass() == MacroQualified; |
4413 | } |
4414 | }; |
4415 | |
4416 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). |
4417 | class TypeOfExprType : public Type { |
4418 | Expr *TOExpr; |
4419 | |
4420 | protected: |
4421 | friend class ASTContext; // ASTContext creates these. |
4422 | |
4423 | TypeOfExprType(Expr *E, QualType can = QualType()); |
4424 | |
4425 | public: |
4426 | Expr *getUnderlyingExpr() const { return TOExpr; } |
4427 | |
4428 | /// Remove a single level of sugar. |
4429 | QualType desugar() const; |
4430 | |
4431 | /// Returns whether this type directly provides sugar. |
4432 | bool isSugared() const; |
4433 | |
4434 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } |
4435 | }; |
4436 | |
4437 | /// Internal representation of canonical, dependent |
4438 | /// `typeof(expr)` types. |
4439 | /// |
4440 | /// This class is used internally by the ASTContext to manage |
4441 | /// canonical, dependent types, only. Clients will only see instances |
4442 | /// of this class via TypeOfExprType nodes. |
4443 | class DependentTypeOfExprType |
4444 | : public TypeOfExprType, public llvm::FoldingSetNode { |
4445 | const ASTContext &Context; |
4446 | |
4447 | public: |
4448 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) |
4449 | : TypeOfExprType(E), Context(Context) {} |
4450 | |
4451 | void Profile(llvm::FoldingSetNodeID &ID) { |
4452 | Profile(ID, Context, getUnderlyingExpr()); |
4453 | } |
4454 | |
4455 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4456 | Expr *E); |
4457 | }; |
4458 | |
4459 | /// Represents `typeof(type)`, a GCC extension. |
4460 | class TypeOfType : public Type { |
4461 | friend class ASTContext; // ASTContext creates these. |
4462 | |
4463 | QualType TOType; |
4464 | |
4465 | TypeOfType(QualType T, QualType can) |
4466 | : Type(TypeOf, can, T->getDependence()), TOType(T) { |
4467 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4467, __PRETTY_FUNCTION__)); |
4468 | } |
4469 | |
4470 | public: |
4471 | QualType getUnderlyingType() const { return TOType; } |
4472 | |
4473 | /// Remove a single level of sugar. |
4474 | QualType desugar() const { return getUnderlyingType(); } |
4475 | |
4476 | /// Returns whether this type directly provides sugar. |
4477 | bool isSugared() const { return true; } |
4478 | |
4479 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } |
4480 | }; |
4481 | |
4482 | /// Represents the type `decltype(expr)` (C++11). |
4483 | class DecltypeType : public Type { |
4484 | Expr *E; |
4485 | QualType UnderlyingType; |
4486 | |
4487 | protected: |
4488 | friend class ASTContext; // ASTContext creates these. |
4489 | |
4490 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); |
4491 | |
4492 | public: |
4493 | Expr *getUnderlyingExpr() const { return E; } |
4494 | QualType getUnderlyingType() const { return UnderlyingType; } |
4495 | |
4496 | /// Remove a single level of sugar. |
4497 | QualType desugar() const; |
4498 | |
4499 | /// Returns whether this type directly provides sugar. |
4500 | bool isSugared() const; |
4501 | |
4502 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } |
4503 | }; |
4504 | |
4505 | /// Internal representation of canonical, dependent |
4506 | /// decltype(expr) types. |
4507 | /// |
4508 | /// This class is used internally by the ASTContext to manage |
4509 | /// canonical, dependent types, only. Clients will only see instances |
4510 | /// of this class via DecltypeType nodes. |
4511 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { |
4512 | const ASTContext &Context; |
4513 | |
4514 | public: |
4515 | DependentDecltypeType(const ASTContext &Context, Expr *E); |
4516 | |
4517 | void Profile(llvm::FoldingSetNodeID &ID) { |
4518 | Profile(ID, Context, getUnderlyingExpr()); |
4519 | } |
4520 | |
4521 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4522 | Expr *E); |
4523 | }; |
4524 | |
4525 | /// A unary type transform, which is a type constructed from another. |
4526 | class UnaryTransformType : public Type { |
4527 | public: |
4528 | enum UTTKind { |
4529 | EnumUnderlyingType |
4530 | }; |
4531 | |
4532 | private: |
4533 | /// The untransformed type. |
4534 | QualType BaseType; |
4535 | |
4536 | /// The transformed type if not dependent, otherwise the same as BaseType. |
4537 | QualType UnderlyingType; |
4538 | |
4539 | UTTKind UKind; |
4540 | |
4541 | protected: |
4542 | friend class ASTContext; |
4543 | |
4544 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, |
4545 | QualType CanonicalTy); |
4546 | |
4547 | public: |
4548 | bool isSugared() const { return !isDependentType(); } |
4549 | QualType desugar() const { return UnderlyingType; } |
4550 | |
4551 | QualType getUnderlyingType() const { return UnderlyingType; } |
4552 | QualType getBaseType() const { return BaseType; } |
4553 | |
4554 | UTTKind getUTTKind() const { return UKind; } |
4555 | |
4556 | static bool classof(const Type *T) { |
4557 | return T->getTypeClass() == UnaryTransform; |
4558 | } |
4559 | }; |
4560 | |
4561 | /// Internal representation of canonical, dependent |
4562 | /// __underlying_type(type) types. |
4563 | /// |
4564 | /// This class is used internally by the ASTContext to manage |
4565 | /// canonical, dependent types, only. Clients will only see instances |
4566 | /// of this class via UnaryTransformType nodes. |
4567 | class DependentUnaryTransformType : public UnaryTransformType, |
4568 | public llvm::FoldingSetNode { |
4569 | public: |
4570 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, |
4571 | UTTKind UKind); |
4572 | |
4573 | void Profile(llvm::FoldingSetNodeID &ID) { |
4574 | Profile(ID, getBaseType(), getUTTKind()); |
4575 | } |
4576 | |
4577 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, |
4578 | UTTKind UKind) { |
4579 | ID.AddPointer(BaseType.getAsOpaquePtr()); |
4580 | ID.AddInteger((unsigned)UKind); |
4581 | } |
4582 | }; |
4583 | |
4584 | class TagType : public Type { |
4585 | friend class ASTReader; |
4586 | template <class T> friend class serialization::AbstractTypeReader; |
4587 | |
4588 | /// Stores the TagDecl associated with this type. The decl may point to any |
4589 | /// TagDecl that declares the entity. |
4590 | TagDecl *decl; |
4591 | |
4592 | protected: |
4593 | TagType(TypeClass TC, const TagDecl *D, QualType can); |
4594 | |
4595 | public: |
4596 | TagDecl *getDecl() const; |
4597 | |
4598 | /// Determines whether this type is in the process of being defined. |
4599 | bool isBeingDefined() const; |
4600 | |
4601 | static bool classof(const Type *T) { |
4602 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; |
4603 | } |
4604 | }; |
4605 | |
4606 | /// A helper class that allows the use of isa/cast/dyncast |
4607 | /// to detect TagType objects of structs/unions/classes. |
4608 | class RecordType : public TagType { |
4609 | protected: |
4610 | friend class ASTContext; // ASTContext creates these. |
4611 | |
4612 | explicit RecordType(const RecordDecl *D) |
4613 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4614 | explicit RecordType(TypeClass TC, RecordDecl *D) |
4615 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4616 | |
4617 | public: |
4618 | RecordDecl *getDecl() const { |
4619 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); |
4620 | } |
4621 | |
4622 | /// Recursively check all fields in the record for const-ness. If any field |
4623 | /// is declared const, return true. Otherwise, return false. |
4624 | bool hasConstFields() const; |
4625 | |
4626 | bool isSugared() const { return false; } |
4627 | QualType desugar() const { return QualType(this, 0); } |
4628 | |
4629 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } |
4630 | }; |
4631 | |
4632 | /// A helper class that allows the use of isa/cast/dyncast |
4633 | /// to detect TagType objects of enums. |
4634 | class EnumType : public TagType { |
4635 | friend class ASTContext; // ASTContext creates these. |
4636 | |
4637 | explicit EnumType(const EnumDecl *D) |
4638 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4639 | |
4640 | public: |
4641 | EnumDecl *getDecl() const { |
4642 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); |
4643 | } |
4644 | |
4645 | bool isSugared() const { return false; } |
4646 | QualType desugar() const { return QualType(this, 0); } |
4647 | |
4648 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } |
4649 | }; |
4650 | |
4651 | /// An attributed type is a type to which a type attribute has been applied. |
4652 | /// |
4653 | /// The "modified type" is the fully-sugared type to which the attributed |
4654 | /// type was applied; generally it is not canonically equivalent to the |
4655 | /// attributed type. The "equivalent type" is the minimally-desugared type |
4656 | /// which the type is canonically equivalent to. |
4657 | /// |
4658 | /// For example, in the following attributed type: |
4659 | /// int32_t __attribute__((vector_size(16))) |
4660 | /// - the modified type is the TypedefType for int32_t |
4661 | /// - the equivalent type is VectorType(16, int32_t) |
4662 | /// - the canonical type is VectorType(16, int) |
4663 | class AttributedType : public Type, public llvm::FoldingSetNode { |
4664 | public: |
4665 | using Kind = attr::Kind; |
4666 | |
4667 | private: |
4668 | friend class ASTContext; // ASTContext creates these |
4669 | |
4670 | QualType ModifiedType; |
4671 | QualType EquivalentType; |
4672 | |
4673 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, |
4674 | QualType equivalent) |
4675 | : Type(Attributed, canon, equivalent->getDependence()), |
4676 | ModifiedType(modified), EquivalentType(equivalent) { |
4677 | AttributedTypeBits.AttrKind = attrKind; |
4678 | } |
4679 | |
4680 | public: |
4681 | Kind getAttrKind() const { |
4682 | return static_cast<Kind>(AttributedTypeBits.AttrKind); |
4683 | } |
4684 | |
4685 | QualType getModifiedType() const { return ModifiedType; } |
4686 | QualType getEquivalentType() const { return EquivalentType; } |
4687 | |
4688 | bool isSugared() const { return true; } |
4689 | QualType desugar() const { return getEquivalentType(); } |
4690 | |
4691 | /// Does this attribute behave like a type qualifier? |
4692 | /// |
4693 | /// A type qualifier adjusts a type to provide specialized rules for |
4694 | /// a specific object, like the standard const and volatile qualifiers. |
4695 | /// This includes attributes controlling things like nullability, |
4696 | /// address spaces, and ARC ownership. The value of the object is still |
4697 | /// largely described by the modified type. |
4698 | /// |
4699 | /// In contrast, many type attributes "rewrite" their modified type to |
4700 | /// produce a fundamentally different type, not necessarily related in any |
4701 | /// formalizable way to the original type. For example, calling convention |
4702 | /// and vector attributes are not simple type qualifiers. |
4703 | /// |
4704 | /// Type qualifiers are often, but not always, reflected in the canonical |
4705 | /// type. |
4706 | bool isQualifier() const; |
4707 | |
4708 | bool isMSTypeSpec() const; |
4709 | |
4710 | bool isCallingConv() const; |
4711 | |
4712 | llvm::Optional<NullabilityKind> getImmediateNullability() const; |
4713 | |
4714 | /// Retrieve the attribute kind corresponding to the given |
4715 | /// nullability kind. |
4716 | static Kind getNullabilityAttrKind(NullabilityKind kind) { |
4717 | switch (kind) { |
4718 | case NullabilityKind::NonNull: |
4719 | return attr::TypeNonNull; |
4720 | |
4721 | case NullabilityKind::Nullable: |
4722 | return attr::TypeNullable; |
4723 | |
4724 | case NullabilityKind::NullableResult: |
4725 | return attr::TypeNullableResult; |
4726 | |
4727 | case NullabilityKind::Unspecified: |
4728 | return attr::TypeNullUnspecified; |
4729 | } |
4730 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 4730); |
4731 | } |
4732 | |
4733 | /// Strip off the top-level nullability annotation on the given |
4734 | /// type, if it's there. |
4735 | /// |
4736 | /// \param T The type to strip. If the type is exactly an |
4737 | /// AttributedType specifying nullability (without looking through |
4738 | /// type sugar), the nullability is returned and this type changed |
4739 | /// to the underlying modified type. |
4740 | /// |
4741 | /// \returns the top-level nullability, if present. |
4742 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); |
4743 | |
4744 | void Profile(llvm::FoldingSetNodeID &ID) { |
4745 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); |
4746 | } |
4747 | |
4748 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, |
4749 | QualType modified, QualType equivalent) { |
4750 | ID.AddInteger(attrKind); |
4751 | ID.AddPointer(modified.getAsOpaquePtr()); |
4752 | ID.AddPointer(equivalent.getAsOpaquePtr()); |
4753 | } |
4754 | |
4755 | static bool classof(const Type *T) { |
4756 | return T->getTypeClass() == Attributed; |
4757 | } |
4758 | }; |
4759 | |
4760 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4761 | friend class ASTContext; // ASTContext creates these |
4762 | |
4763 | // Helper data collector for canonical types. |
4764 | struct CanonicalTTPTInfo { |
4765 | unsigned Depth : 15; |
4766 | unsigned ParameterPack : 1; |
4767 | unsigned Index : 16; |
4768 | }; |
4769 | |
4770 | union { |
4771 | // Info for the canonical type. |
4772 | CanonicalTTPTInfo CanTTPTInfo; |
4773 | |
4774 | // Info for the non-canonical type. |
4775 | TemplateTypeParmDecl *TTPDecl; |
4776 | }; |
4777 | |
4778 | /// Build a non-canonical type. |
4779 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) |
4780 | : Type(TemplateTypeParm, Canon, |
4781 | TypeDependence::DependentInstantiation | |
4782 | (Canon->getDependence() & TypeDependence::UnexpandedPack)), |
4783 | TTPDecl(TTPDecl) {} |
4784 | |
4785 | /// Build the canonical type. |
4786 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) |
4787 | : Type(TemplateTypeParm, QualType(this, 0), |
4788 | TypeDependence::DependentInstantiation | |
4789 | (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) { |
4790 | CanTTPTInfo.Depth = D; |
4791 | CanTTPTInfo.Index = I; |
4792 | CanTTPTInfo.ParameterPack = PP; |
4793 | } |
4794 | |
4795 | const CanonicalTTPTInfo& getCanTTPTInfo() const { |
4796 | QualType Can = getCanonicalTypeInternal(); |
4797 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; |
4798 | } |
4799 | |
4800 | public: |
4801 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } |
4802 | unsigned getIndex() const { return getCanTTPTInfo().Index; } |
4803 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } |
4804 | |
4805 | TemplateTypeParmDecl *getDecl() const { |
4806 | return isCanonicalUnqualified() ? nullptr : TTPDecl; |
4807 | } |
4808 | |
4809 | IdentifierInfo *getIdentifier() const; |
4810 | |
4811 | bool isSugared() const { return false; } |
4812 | QualType desugar() const { return QualType(this, 0); } |
4813 | |
4814 | void Profile(llvm::FoldingSetNodeID &ID) { |
4815 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); |
4816 | } |
4817 | |
4818 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, |
4819 | unsigned Index, bool ParameterPack, |
4820 | TemplateTypeParmDecl *TTPDecl) { |
4821 | ID.AddInteger(Depth); |
4822 | ID.AddInteger(Index); |
4823 | ID.AddBoolean(ParameterPack); |
4824 | ID.AddPointer(TTPDecl); |
4825 | } |
4826 | |
4827 | static bool classof(const Type *T) { |
4828 | return T->getTypeClass() == TemplateTypeParm; |
4829 | } |
4830 | }; |
4831 | |
4832 | /// Represents the result of substituting a type for a template |
4833 | /// type parameter. |
4834 | /// |
4835 | /// Within an instantiated template, all template type parameters have |
4836 | /// been replaced with these. They are used solely to record that a |
4837 | /// type was originally written as a template type parameter; |
4838 | /// therefore they are never canonical. |
4839 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4840 | friend class ASTContext; |
4841 | |
4842 | // The original type parameter. |
4843 | const TemplateTypeParmType *Replaced; |
4844 | |
4845 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) |
4846 | : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()), |
4847 | Replaced(Param) {} |
4848 | |
4849 | public: |
4850 | /// Gets the template parameter that was substituted for. |
4851 | const TemplateTypeParmType *getReplacedParameter() const { |
4852 | return Replaced; |
4853 | } |
4854 | |
4855 | /// Gets the type that was substituted for the template |
4856 | /// parameter. |
4857 | QualType getReplacementType() const { |
4858 | return getCanonicalTypeInternal(); |
4859 | } |
4860 | |
4861 | bool isSugared() const { return true; } |
4862 | QualType desugar() const { return getReplacementType(); } |
4863 | |
4864 | void Profile(llvm::FoldingSetNodeID &ID) { |
4865 | Profile(ID, getReplacedParameter(), getReplacementType()); |
4866 | } |
4867 | |
4868 | static void Profile(llvm::FoldingSetNodeID &ID, |
4869 | const TemplateTypeParmType *Replaced, |
4870 | QualType Replacement) { |
4871 | ID.AddPointer(Replaced); |
4872 | ID.AddPointer(Replacement.getAsOpaquePtr()); |
4873 | } |
4874 | |
4875 | static bool classof(const Type *T) { |
4876 | return T->getTypeClass() == SubstTemplateTypeParm; |
4877 | } |
4878 | }; |
4879 | |
4880 | /// Represents the result of substituting a set of types for a template |
4881 | /// type parameter pack. |
4882 | /// |
4883 | /// When a pack expansion in the source code contains multiple parameter packs |
4884 | /// and those parameter packs correspond to different levels of template |
4885 | /// parameter lists, this type node is used to represent a template type |
4886 | /// parameter pack from an outer level, which has already had its argument pack |
4887 | /// substituted but that still lives within a pack expansion that itself |
4888 | /// could not be instantiated. When actually performing a substitution into |
4889 | /// that pack expansion (e.g., when all template parameters have corresponding |
4890 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType |
4891 | /// at the current pack substitution index. |
4892 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { |
4893 | friend class ASTContext; |
4894 | |
4895 | /// The original type parameter. |
4896 | const TemplateTypeParmType *Replaced; |
4897 | |
4898 | /// A pointer to the set of template arguments that this |
4899 | /// parameter pack is instantiated with. |
4900 | const TemplateArgument *Arguments; |
4901 | |
4902 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, |
4903 | QualType Canon, |
4904 | const TemplateArgument &ArgPack); |
4905 | |
4906 | public: |
4907 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } |
4908 | |
4909 | /// Gets the template parameter that was substituted for. |
4910 | const TemplateTypeParmType *getReplacedParameter() const { |
4911 | return Replaced; |
4912 | } |
4913 | |
4914 | unsigned getNumArgs() const { |
4915 | return SubstTemplateTypeParmPackTypeBits.NumArgs; |
4916 | } |
4917 | |
4918 | bool isSugared() const { return false; } |
4919 | QualType desugar() const { return QualType(this, 0); } |
4920 | |
4921 | TemplateArgument getArgumentPack() const; |
4922 | |
4923 | void Profile(llvm::FoldingSetNodeID &ID); |
4924 | static void Profile(llvm::FoldingSetNodeID &ID, |
4925 | const TemplateTypeParmType *Replaced, |
4926 | const TemplateArgument &ArgPack); |
4927 | |
4928 | static bool classof(const Type *T) { |
4929 | return T->getTypeClass() == SubstTemplateTypeParmPack; |
4930 | } |
4931 | }; |
4932 | |
4933 | /// Common base class for placeholders for types that get replaced by |
4934 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced |
4935 | /// class template types, and constrained type names. |
4936 | /// |
4937 | /// These types are usually a placeholder for a deduced type. However, before |
4938 | /// the initializer is attached, or (usually) if the initializer is |
4939 | /// type-dependent, there is no deduced type and the type is canonical. In |
4940 | /// the latter case, it is also a dependent type. |
4941 | class DeducedType : public Type { |
4942 | protected: |
4943 | DeducedType(TypeClass TC, QualType DeducedAsType, |
4944 | TypeDependence ExtraDependence) |
4945 | : Type(TC, |
4946 | // FIXME: Retain the sugared deduced type? |
4947 | DeducedAsType.isNull() ? QualType(this, 0) |
4948 | : DeducedAsType.getCanonicalType(), |
4949 | ExtraDependence | (DeducedAsType.isNull() |
4950 | ? TypeDependence::None |
4951 | : DeducedAsType->getDependence() & |
4952 | ~TypeDependence::VariablyModified)) {} |
4953 | |
4954 | public: |
4955 | bool isSugared() const { return !isCanonicalUnqualified(); } |
4956 | QualType desugar() const { return getCanonicalTypeInternal(); } |
4957 | |
4958 | /// Get the type deduced for this placeholder type, or null if it's |
4959 | /// either not been deduced or was deduced to a dependent type. |
4960 | QualType getDeducedType() const { |
4961 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); |
4962 | } |
4963 | bool isDeduced() const { |
4964 | return !isCanonicalUnqualified() || isDependentType(); |
4965 | } |
4966 | |
4967 | static bool classof(const Type *T) { |
4968 | return T->getTypeClass() == Auto || |
4969 | T->getTypeClass() == DeducedTemplateSpecialization; |
4970 | } |
4971 | }; |
4972 | |
4973 | /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained |
4974 | /// by a type-constraint. |
4975 | class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode { |
4976 | friend class ASTContext; // ASTContext creates these |
4977 | |
4978 | ConceptDecl *TypeConstraintConcept; |
4979 | |
4980 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, |
4981 | TypeDependence ExtraDependence, ConceptDecl *CD, |
4982 | ArrayRef<TemplateArgument> TypeConstraintArgs); |
4983 | |
4984 | const TemplateArgument *getArgBuffer() const { |
4985 | return reinterpret_cast<const TemplateArgument*>(this+1); |
4986 | } |
4987 | |
4988 | TemplateArgument *getArgBuffer() { |
4989 | return reinterpret_cast<TemplateArgument*>(this+1); |
4990 | } |
4991 | |
4992 | public: |
4993 | /// Retrieve the template arguments. |
4994 | const TemplateArgument *getArgs() const { |
4995 | return getArgBuffer(); |
4996 | } |
4997 | |
4998 | /// Retrieve the number of template arguments. |
4999 | unsigned getNumArgs() const { |
5000 | return AutoTypeBits.NumArgs; |
5001 | } |
5002 | |
5003 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5004 | |
5005 | ArrayRef<TemplateArgument> getTypeConstraintArguments() const { |
5006 | return {getArgs(), getNumArgs()}; |
5007 | } |
5008 | |
5009 | ConceptDecl *getTypeConstraintConcept() const { |
5010 | return TypeConstraintConcept; |
5011 | } |
5012 | |
5013 | bool isConstrained() const { |
5014 | return TypeConstraintConcept != nullptr; |
5015 | } |
5016 | |
5017 | bool isDecltypeAuto() const { |
5018 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; |
5019 | } |
5020 | |
5021 | AutoTypeKeyword getKeyword() const { |
5022 | return (AutoTypeKeyword)AutoTypeBits.Keyword; |
5023 | } |
5024 | |
5025 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5026 | Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(), |
5027 | getTypeConstraintConcept(), getTypeConstraintArguments()); |
5028 | } |
5029 | |
5030 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
5031 | QualType Deduced, AutoTypeKeyword Keyword, |
5032 | bool IsDependent, ConceptDecl *CD, |
5033 | ArrayRef<TemplateArgument> Arguments); |
5034 | |
5035 | static bool classof(const Type *T) { |
5036 | return T->getTypeClass() == Auto; |
5037 | } |
5038 | }; |
5039 | |
5040 | /// Represents a C++17 deduced template specialization type. |
5041 | class DeducedTemplateSpecializationType : public DeducedType, |
5042 | public llvm::FoldingSetNode { |
5043 | friend class ASTContext; // ASTContext creates these |
5044 | |
5045 | /// The name of the template whose arguments will be deduced. |
5046 | TemplateName Template; |
5047 | |
5048 | DeducedTemplateSpecializationType(TemplateName Template, |
5049 | QualType DeducedAsType, |
5050 | bool IsDeducedAsDependent) |
5051 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, |
5052 | toTypeDependence(Template.getDependence()) | |
5053 | (IsDeducedAsDependent |
5054 | ? TypeDependence::DependentInstantiation |
5055 | : TypeDependence::None)), |
5056 | Template(Template) {} |
5057 | |
5058 | public: |
5059 | /// Retrieve the name of the template that we are deducing. |
5060 | TemplateName getTemplateName() const { return Template;} |
5061 | |
5062 | void Profile(llvm::FoldingSetNodeID &ID) { |
5063 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); |
5064 | } |
5065 | |
5066 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, |
5067 | QualType Deduced, bool IsDependent) { |
5068 | Template.Profile(ID); |
5069 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
5070 | ID.AddBoolean(IsDependent); |
5071 | } |
5072 | |
5073 | static bool classof(const Type *T) { |
5074 | return T->getTypeClass() == DeducedTemplateSpecialization; |
5075 | } |
5076 | }; |
5077 | |
5078 | /// Represents a type template specialization; the template |
5079 | /// must be a class template, a type alias template, or a template |
5080 | /// template parameter. A template which cannot be resolved to one of |
5081 | /// these, e.g. because it is written with a dependent scope |
5082 | /// specifier, is instead represented as a |
5083 | /// @c DependentTemplateSpecializationType. |
5084 | /// |
5085 | /// A non-dependent template specialization type is always "sugar", |
5086 | /// typically for a \c RecordType. For example, a class template |
5087 | /// specialization type of \c vector<int> will refer to a tag type for |
5088 | /// the instantiation \c std::vector<int, std::allocator<int>> |
5089 | /// |
5090 | /// Template specializations are dependent if either the template or |
5091 | /// any of the template arguments are dependent, in which case the |
5092 | /// type may also be canonical. |
5093 | /// |
5094 | /// Instances of this type are allocated with a trailing array of |
5095 | /// TemplateArguments, followed by a QualType representing the |
5096 | /// non-canonical aliased type when the template is a type alias |
5097 | /// template. |
5098 | class alignas(8) TemplateSpecializationType |
5099 | : public Type, |
5100 | public llvm::FoldingSetNode { |
5101 | friend class ASTContext; // ASTContext creates these |
5102 | |
5103 | /// The name of the template being specialized. This is |
5104 | /// either a TemplateName::Template (in which case it is a |
5105 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a |
5106 | /// TypeAliasTemplateDecl*), a |
5107 | /// TemplateName::SubstTemplateTemplateParmPack, or a |
5108 | /// TemplateName::SubstTemplateTemplateParm (in which case the |
5109 | /// replacement must, recursively, be one of these). |
5110 | TemplateName Template; |
5111 | |
5112 | TemplateSpecializationType(TemplateName T, |
5113 | ArrayRef<TemplateArgument> Args, |
5114 | QualType Canon, |
5115 | QualType Aliased); |
5116 | |
5117 | public: |
5118 | /// Determine whether any of the given template arguments are dependent. |
5119 | /// |
5120 | /// The converted arguments should be supplied when known; whether an |
5121 | /// argument is dependent can depend on the conversions performed on it |
5122 | /// (for example, a 'const int' passed as a template argument might be |
5123 | /// dependent if the parameter is a reference but non-dependent if the |
5124 | /// parameter is an int). |
5125 | /// |
5126 | /// Note that the \p Args parameter is unused: this is intentional, to remind |
5127 | /// the caller that they need to pass in the converted arguments, not the |
5128 | /// specified arguments. |
5129 | static bool |
5130 | anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, |
5131 | ArrayRef<TemplateArgument> Converted); |
5132 | static bool |
5133 | anyDependentTemplateArguments(const TemplateArgumentListInfo &, |
5134 | ArrayRef<TemplateArgument> Converted); |
5135 | static bool anyInstantiationDependentTemplateArguments( |
5136 | ArrayRef<TemplateArgumentLoc> Args); |
5137 | |
5138 | /// True if this template specialization type matches a current |
5139 | /// instantiation in the context in which it is found. |
5140 | bool isCurrentInstantiation() const { |
5141 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); |
5142 | } |
5143 | |
5144 | /// Determine if this template specialization type is for a type alias |
5145 | /// template that has been substituted. |
5146 | /// |
5147 | /// Nearly every template specialization type whose template is an alias |
5148 | /// template will be substituted. However, this is not the case when |
5149 | /// the specialization contains a pack expansion but the template alias |
5150 | /// does not have a corresponding parameter pack, e.g., |
5151 | /// |
5152 | /// \code |
5153 | /// template<typename T, typename U, typename V> struct S; |
5154 | /// template<typename T, typename U> using A = S<T, int, U>; |
5155 | /// template<typename... Ts> struct X { |
5156 | /// typedef A<Ts...> type; // not a type alias |
5157 | /// }; |
5158 | /// \endcode |
5159 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } |
5160 | |
5161 | /// Get the aliased type, if this is a specialization of a type alias |
5162 | /// template. |
5163 | QualType getAliasedType() const { |
5164 | assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization" ) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5164, __PRETTY_FUNCTION__)); |
5165 | return *reinterpret_cast<const QualType*>(end()); |
5166 | } |
5167 | |
5168 | using iterator = const TemplateArgument *; |
5169 | |
5170 | iterator begin() const { return getArgs(); } |
5171 | iterator end() const; // defined inline in TemplateBase.h |
5172 | |
5173 | /// Retrieve the name of the template that we are specializing. |
5174 | TemplateName getTemplateName() const { return Template; } |
5175 | |
5176 | /// Retrieve the template arguments. |
5177 | const TemplateArgument *getArgs() const { |
5178 | return reinterpret_cast<const TemplateArgument *>(this + 1); |
5179 | } |
5180 | |
5181 | /// Retrieve the number of template arguments. |
5182 | unsigned getNumArgs() const { |
5183 | return TemplateSpecializationTypeBits.NumArgs; |
5184 | } |
5185 | |
5186 | /// Retrieve a specific template argument as a type. |
5187 | /// \pre \c isArgType(Arg) |
5188 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5189 | |
5190 | ArrayRef<TemplateArgument> template_arguments() const { |
5191 | return {getArgs(), getNumArgs()}; |
5192 | } |
5193 | |
5194 | bool isSugared() const { |
5195 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); |
5196 | } |
5197 | |
5198 | QualType desugar() const { |
5199 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); |
5200 | } |
5201 | |
5202 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
5203 | Profile(ID, Template, template_arguments(), Ctx); |
5204 | if (isTypeAlias()) |
5205 | getAliasedType().Profile(ID); |
5206 | } |
5207 | |
5208 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, |
5209 | ArrayRef<TemplateArgument> Args, |
5210 | const ASTContext &Context); |
5211 | |
5212 | static bool classof(const Type *T) { |
5213 | return T->getTypeClass() == TemplateSpecialization; |
5214 | } |
5215 | }; |
5216 | |
5217 | /// Print a template argument list, including the '<' and '>' |
5218 | /// enclosing the template arguments. |
5219 | void printTemplateArgumentList(raw_ostream &OS, |
5220 | ArrayRef<TemplateArgument> Args, |
5221 | const PrintingPolicy &Policy, |
5222 | const TemplateParameterList *TPL = nullptr); |
5223 | |
5224 | void printTemplateArgumentList(raw_ostream &OS, |
5225 | ArrayRef<TemplateArgumentLoc> Args, |
5226 | const PrintingPolicy &Policy, |
5227 | const TemplateParameterList *TPL = nullptr); |
5228 | |
5229 | void printTemplateArgumentList(raw_ostream &OS, |
5230 | const TemplateArgumentListInfo &Args, |
5231 | const PrintingPolicy &Policy, |
5232 | const TemplateParameterList *TPL = nullptr); |
5233 | |
5234 | /// The injected class name of a C++ class template or class |
5235 | /// template partial specialization. Used to record that a type was |
5236 | /// spelled with a bare identifier rather than as a template-id; the |
5237 | /// equivalent for non-templated classes is just RecordType. |
5238 | /// |
5239 | /// Injected class name types are always dependent. Template |
5240 | /// instantiation turns these into RecordTypes. |
5241 | /// |
5242 | /// Injected class name types are always canonical. This works |
5243 | /// because it is impossible to compare an injected class name type |
5244 | /// with the corresponding non-injected template type, for the same |
5245 | /// reason that it is impossible to directly compare template |
5246 | /// parameters from different dependent contexts: injected class name |
5247 | /// types can only occur within the scope of a particular templated |
5248 | /// declaration, and within that scope every template specialization |
5249 | /// will canonicalize to the injected class name (when appropriate |
5250 | /// according to the rules of the language). |
5251 | class InjectedClassNameType : public Type { |
5252 | friend class ASTContext; // ASTContext creates these. |
5253 | friend class ASTNodeImporter; |
5254 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not |
5255 | // currently suitable for AST reading, too much |
5256 | // interdependencies. |
5257 | template <class T> friend class serialization::AbstractTypeReader; |
5258 | |
5259 | CXXRecordDecl *Decl; |
5260 | |
5261 | /// The template specialization which this type represents. |
5262 | /// For example, in |
5263 | /// template <class T> class A { ... }; |
5264 | /// this is A<T>, whereas in |
5265 | /// template <class X, class Y> class A<B<X,Y> > { ... }; |
5266 | /// this is A<B<X,Y> >. |
5267 | /// |
5268 | /// It is always unqualified, always a template specialization type, |
5269 | /// and always dependent. |
5270 | QualType InjectedType; |
5271 | |
5272 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) |
5273 | : Type(InjectedClassName, QualType(), |
5274 | TypeDependence::DependentInstantiation), |
5275 | Decl(D), InjectedType(TST) { |
5276 | assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast< void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5276, __PRETTY_FUNCTION__)); |
5277 | assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5277, __PRETTY_FUNCTION__)); |
5278 | assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5278, __PRETTY_FUNCTION__)); |
5279 | } |
5280 | |
5281 | public: |
5282 | QualType getInjectedSpecializationType() const { return InjectedType; } |
5283 | |
5284 | const TemplateSpecializationType *getInjectedTST() const { |
5285 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); |
5286 | } |
5287 | |
5288 | TemplateName getTemplateName() const { |
5289 | return getInjectedTST()->getTemplateName(); |
5290 | } |
5291 | |
5292 | CXXRecordDecl *getDecl() const; |
5293 | |
5294 | bool isSugared() const { return false; } |
5295 | QualType desugar() const { return QualType(this, 0); } |
5296 | |
5297 | static bool classof(const Type *T) { |
5298 | return T->getTypeClass() == InjectedClassName; |
5299 | } |
5300 | }; |
5301 | |
5302 | /// The kind of a tag type. |
5303 | enum TagTypeKind { |
5304 | /// The "struct" keyword. |
5305 | TTK_Struct, |
5306 | |
5307 | /// The "__interface" keyword. |
5308 | TTK_Interface, |
5309 | |
5310 | /// The "union" keyword. |
5311 | TTK_Union, |
5312 | |
5313 | /// The "class" keyword. |
5314 | TTK_Class, |
5315 | |
5316 | /// The "enum" keyword. |
5317 | TTK_Enum |
5318 | }; |
5319 | |
5320 | /// The elaboration keyword that precedes a qualified type name or |
5321 | /// introduces an elaborated-type-specifier. |
5322 | enum ElaboratedTypeKeyword { |
5323 | /// The "struct" keyword introduces the elaborated-type-specifier. |
5324 | ETK_Struct, |
5325 | |
5326 | /// The "__interface" keyword introduces the elaborated-type-specifier. |
5327 | ETK_Interface, |
5328 | |
5329 | /// The "union" keyword introduces the elaborated-type-specifier. |
5330 | ETK_Union, |
5331 | |
5332 | /// The "class" keyword introduces the elaborated-type-specifier. |
5333 | ETK_Class, |
5334 | |
5335 | /// The "enum" keyword introduces the elaborated-type-specifier. |
5336 | ETK_Enum, |
5337 | |
5338 | /// The "typename" keyword precedes the qualified type name, e.g., |
5339 | /// \c typename T::type. |
5340 | ETK_Typename, |
5341 | |
5342 | /// No keyword precedes the qualified type name. |
5343 | ETK_None |
5344 | }; |
5345 | |
5346 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. |
5347 | /// The keyword in stored in the free bits of the base class. |
5348 | /// Also provides a few static helpers for converting and printing |
5349 | /// elaborated type keyword and tag type kind enumerations. |
5350 | class TypeWithKeyword : public Type { |
5351 | protected: |
5352 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, |
5353 | QualType Canonical, TypeDependence Dependence) |
5354 | : Type(tc, Canonical, Dependence) { |
5355 | TypeWithKeywordBits.Keyword = Keyword; |
5356 | } |
5357 | |
5358 | public: |
5359 | ElaboratedTypeKeyword getKeyword() const { |
5360 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); |
5361 | } |
5362 | |
5363 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. |
5364 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); |
5365 | |
5366 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. |
5367 | /// It is an error to provide a type specifier which *isn't* a tag kind here. |
5368 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); |
5369 | |
5370 | /// Converts a TagTypeKind into an elaborated type keyword. |
5371 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); |
5372 | |
5373 | /// Converts an elaborated type keyword into a TagTypeKind. |
5374 | /// It is an error to provide an elaborated type keyword |
5375 | /// which *isn't* a tag kind here. |
5376 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); |
5377 | |
5378 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); |
5379 | |
5380 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); |
5381 | |
5382 | static StringRef getTagTypeKindName(TagTypeKind Kind) { |
5383 | return getKeywordName(getKeywordForTagTypeKind(Kind)); |
5384 | } |
5385 | |
5386 | class CannotCastToThisType {}; |
5387 | static CannotCastToThisType classof(const Type *); |
5388 | }; |
5389 | |
5390 | /// Represents a type that was referred to using an elaborated type |
5391 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, |
5392 | /// or both. |
5393 | /// |
5394 | /// This type is used to keep track of a type name as written in the |
5395 | /// source code, including tag keywords and any nested-name-specifiers. |
5396 | /// The type itself is always "sugar", used to express what was written |
5397 | /// in the source code but containing no additional semantic information. |
5398 | class ElaboratedType final |
5399 | : public TypeWithKeyword, |
5400 | public llvm::FoldingSetNode, |
5401 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { |
5402 | friend class ASTContext; // ASTContext creates these |
5403 | friend TrailingObjects; |
5404 | |
5405 | /// The nested name specifier containing the qualifier. |
5406 | NestedNameSpecifier *NNS; |
5407 | |
5408 | /// The type that this qualified name refers to. |
5409 | QualType NamedType; |
5410 | |
5411 | /// The (re)declaration of this tag type owned by this occurrence is stored |
5412 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain |
5413 | /// it, or obtain a null pointer if there is none. |
5414 | |
5415 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5416 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) |
5417 | : TypeWithKeyword(Keyword, Elaborated, CanonType, |
5418 | // Any semantic dependence on the qualifier will have |
5419 | // been incorporated into NamedType. We still need to |
5420 | // track syntactic (instantiation / error / pack) |
5421 | // dependence on the qualifier. |
5422 | NamedType->getDependence() | |
5423 | (NNS ? toSyntacticDependence( |
5424 | toTypeDependence(NNS->getDependence())) |
5425 | : TypeDependence::None)), |
5426 | NNS(NNS), NamedType(NamedType) { |
5427 | ElaboratedTypeBits.HasOwnedTagDecl = false; |
5428 | if (OwnedTagDecl) { |
5429 | ElaboratedTypeBits.HasOwnedTagDecl = true; |
5430 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; |
5431 | } |
5432 | assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5434, __PRETTY_FUNCTION__)) |
5433 | "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5434, __PRETTY_FUNCTION__)) |
5434 | "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5434, __PRETTY_FUNCTION__)); |
5435 | } |
5436 | |
5437 | public: |
5438 | /// Retrieve the qualification on this type. |
5439 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5440 | |
5441 | /// Retrieve the type named by the qualified-id. |
5442 | QualType getNamedType() const { return NamedType; } |
5443 | |
5444 | /// Remove a single level of sugar. |
5445 | QualType desugar() const { return getNamedType(); } |
5446 | |
5447 | /// Returns whether this type directly provides sugar. |
5448 | bool isSugared() const { return true; } |
5449 | |
5450 | /// Return the (re)declaration of this type owned by this occurrence of this |
5451 | /// type, or nullptr if there is none. |
5452 | TagDecl *getOwnedTagDecl() const { |
5453 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() |
5454 | : nullptr; |
5455 | } |
5456 | |
5457 | void Profile(llvm::FoldingSetNodeID &ID) { |
5458 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); |
5459 | } |
5460 | |
5461 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5462 | NestedNameSpecifier *NNS, QualType NamedType, |
5463 | TagDecl *OwnedTagDecl) { |
5464 | ID.AddInteger(Keyword); |
5465 | ID.AddPointer(NNS); |
5466 | NamedType.Profile(ID); |
5467 | ID.AddPointer(OwnedTagDecl); |
5468 | } |
5469 | |
5470 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } |
5471 | }; |
5472 | |
5473 | /// Represents a qualified type name for which the type name is |
5474 | /// dependent. |
5475 | /// |
5476 | /// DependentNameType represents a class of dependent types that involve a |
5477 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a |
5478 | /// name of a type. The DependentNameType may start with a "typename" (for a |
5479 | /// typename-specifier), "class", "struct", "union", or "enum" (for a |
5480 | /// dependent elaborated-type-specifier), or nothing (in contexts where we |
5481 | /// know that we must be referring to a type, e.g., in a base class specifier). |
5482 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility |
5483 | /// mode, this type is used with non-dependent names to delay name lookup until |
5484 | /// instantiation. |
5485 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { |
5486 | friend class ASTContext; // ASTContext creates these |
5487 | |
5488 | /// The nested name specifier containing the qualifier. |
5489 | NestedNameSpecifier *NNS; |
5490 | |
5491 | /// The type that this typename specifier refers to. |
5492 | const IdentifierInfo *Name; |
5493 | |
5494 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5495 | const IdentifierInfo *Name, QualType CanonType) |
5496 | : TypeWithKeyword(Keyword, DependentName, CanonType, |
5497 | TypeDependence::DependentInstantiation | |
5498 | toTypeDependence(NNS->getDependence())), |
5499 | NNS(NNS), Name(Name) {} |
5500 | |
5501 | public: |
5502 | /// Retrieve the qualification on this type. |
5503 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5504 | |
5505 | /// Retrieve the type named by the typename specifier as an identifier. |
5506 | /// |
5507 | /// This routine will return a non-NULL identifier pointer when the |
5508 | /// form of the original typename was terminated by an identifier, |
5509 | /// e.g., "typename T::type". |
5510 | const IdentifierInfo *getIdentifier() const { |
5511 | return Name; |
5512 | } |
5513 | |
5514 | bool isSugared() const { return false; } |
5515 | QualType desugar() const { return QualType(this, 0); } |
5516 | |
5517 | void Profile(llvm::FoldingSetNodeID &ID) { |
5518 | Profile(ID, getKeyword(), NNS, Name); |
5519 | } |
5520 | |
5521 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5522 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { |
5523 | ID.AddInteger(Keyword); |
5524 | ID.AddPointer(NNS); |
5525 | ID.AddPointer(Name); |
5526 | } |
5527 | |
5528 | static bool classof(const Type *T) { |
5529 | return T->getTypeClass() == DependentName; |
5530 | } |
5531 | }; |
5532 | |
5533 | /// Represents a template specialization type whose template cannot be |
5534 | /// resolved, e.g. |
5535 | /// A<T>::template B<T> |
5536 | class alignas(8) DependentTemplateSpecializationType |
5537 | : public TypeWithKeyword, |
5538 | public llvm::FoldingSetNode { |
5539 | friend class ASTContext; // ASTContext creates these |
5540 | |
5541 | /// The nested name specifier containing the qualifier. |
5542 | NestedNameSpecifier *NNS; |
5543 | |
5544 | /// The identifier of the template. |
5545 | const IdentifierInfo *Name; |
5546 | |
5547 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, |
5548 | NestedNameSpecifier *NNS, |
5549 | const IdentifierInfo *Name, |
5550 | ArrayRef<TemplateArgument> Args, |
5551 | QualType Canon); |
5552 | |
5553 | const TemplateArgument *getArgBuffer() const { |
5554 | return reinterpret_cast<const TemplateArgument*>(this+1); |
5555 | } |
5556 | |
5557 | TemplateArgument *getArgBuffer() { |
5558 | return reinterpret_cast<TemplateArgument*>(this+1); |
5559 | } |
5560 | |
5561 | public: |
5562 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5563 | const IdentifierInfo *getIdentifier() const { return Name; } |
5564 | |
5565 | /// Retrieve the template arguments. |
5566 | const TemplateArgument *getArgs() const { |
5567 | return getArgBuffer(); |
5568 | } |
5569 | |
5570 | /// Retrieve the number of template arguments. |
5571 | unsigned getNumArgs() const { |
5572 | return DependentTemplateSpecializationTypeBits.NumArgs; |
5573 | } |
5574 | |
5575 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5576 | |
5577 | ArrayRef<TemplateArgument> template_arguments() const { |
5578 | return {getArgs(), getNumArgs()}; |
5579 | } |
5580 | |
5581 | using iterator = const TemplateArgument *; |
5582 | |
5583 | iterator begin() const { return getArgs(); } |
5584 | iterator end() const; // inline in TemplateBase.h |
5585 | |
5586 | bool isSugared() const { return false; } |
5587 | QualType desugar() const { return QualType(this, 0); } |
5588 | |
5589 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5590 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); |
5591 | } |
5592 | |
5593 | static void Profile(llvm::FoldingSetNodeID &ID, |
5594 | const ASTContext &Context, |
5595 | ElaboratedTypeKeyword Keyword, |
5596 | NestedNameSpecifier *Qualifier, |
5597 | const IdentifierInfo *Name, |
5598 | ArrayRef<TemplateArgument> Args); |
5599 | |
5600 | static bool classof(const Type *T) { |
5601 | return T->getTypeClass() == DependentTemplateSpecialization; |
5602 | } |
5603 | }; |
5604 | |
5605 | /// Represents a pack expansion of types. |
5606 | /// |
5607 | /// Pack expansions are part of C++11 variadic templates. A pack |
5608 | /// expansion contains a pattern, which itself contains one or more |
5609 | /// "unexpanded" parameter packs. When instantiated, a pack expansion |
5610 | /// produces a series of types, each instantiated from the pattern of |
5611 | /// the expansion, where the Ith instantiation of the pattern uses the |
5612 | /// Ith arguments bound to each of the unexpanded parameter packs. The |
5613 | /// pack expansion is considered to "expand" these unexpanded |
5614 | /// parameter packs. |
5615 | /// |
5616 | /// \code |
5617 | /// template<typename ...Types> struct tuple; |
5618 | /// |
5619 | /// template<typename ...Types> |
5620 | /// struct tuple_of_references { |
5621 | /// typedef tuple<Types&...> type; |
5622 | /// }; |
5623 | /// \endcode |
5624 | /// |
5625 | /// Here, the pack expansion \c Types&... is represented via a |
5626 | /// PackExpansionType whose pattern is Types&. |
5627 | class PackExpansionType : public Type, public llvm::FoldingSetNode { |
5628 | friend class ASTContext; // ASTContext creates these |
5629 | |
5630 | /// The pattern of the pack expansion. |
5631 | QualType Pattern; |
5632 | |
5633 | PackExpansionType(QualType Pattern, QualType Canon, |
5634 | Optional<unsigned> NumExpansions) |
5635 | : Type(PackExpansion, Canon, |
5636 | (Pattern->getDependence() | TypeDependence::Dependent | |
5637 | TypeDependence::Instantiation) & |
5638 | ~TypeDependence::UnexpandedPack), |
5639 | Pattern(Pattern) { |
5640 | PackExpansionTypeBits.NumExpansions = |
5641 | NumExpansions ? *NumExpansions + 1 : 0; |
5642 | } |
5643 | |
5644 | public: |
5645 | /// Retrieve the pattern of this pack expansion, which is the |
5646 | /// type that will be repeatedly instantiated when instantiating the |
5647 | /// pack expansion itself. |
5648 | QualType getPattern() const { return Pattern; } |
5649 | |
5650 | /// Retrieve the number of expansions that this pack expansion will |
5651 | /// generate, if known. |
5652 | Optional<unsigned> getNumExpansions() const { |
5653 | if (PackExpansionTypeBits.NumExpansions) |
5654 | return PackExpansionTypeBits.NumExpansions - 1; |
5655 | return None; |
5656 | } |
5657 | |
5658 | bool isSugared() const { return false; } |
5659 | QualType desugar() const { return QualType(this, 0); } |
5660 | |
5661 | void Profile(llvm::FoldingSetNodeID &ID) { |
5662 | Profile(ID, getPattern(), getNumExpansions()); |
5663 | } |
5664 | |
5665 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, |
5666 | Optional<unsigned> NumExpansions) { |
5667 | ID.AddPointer(Pattern.getAsOpaquePtr()); |
5668 | ID.AddBoolean(NumExpansions.hasValue()); |
5669 | if (NumExpansions) |
5670 | ID.AddInteger(*NumExpansions); |
5671 | } |
5672 | |
5673 | static bool classof(const Type *T) { |
5674 | return T->getTypeClass() == PackExpansion; |
5675 | } |
5676 | }; |
5677 | |
5678 | /// This class wraps the list of protocol qualifiers. For types that can |
5679 | /// take ObjC protocol qualifers, they can subclass this class. |
5680 | template <class T> |
5681 | class ObjCProtocolQualifiers { |
5682 | protected: |
5683 | ObjCProtocolQualifiers() = default; |
5684 | |
5685 | ObjCProtocolDecl * const *getProtocolStorage() const { |
5686 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); |
5687 | } |
5688 | |
5689 | ObjCProtocolDecl **getProtocolStorage() { |
5690 | return static_cast<T*>(this)->getProtocolStorageImpl(); |
5691 | } |
5692 | |
5693 | void setNumProtocols(unsigned N) { |
5694 | static_cast<T*>(this)->setNumProtocolsImpl(N); |
5695 | } |
5696 | |
5697 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { |
5698 | setNumProtocols(protocols.size()); |
5699 | assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5700, __PRETTY_FUNCTION__)) |
5700 | "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5700, __PRETTY_FUNCTION__)); |
5701 | if (!protocols.empty()) |
5702 | memcpy(getProtocolStorage(), protocols.data(), |
5703 | protocols.size() * sizeof(ObjCProtocolDecl*)); |
5704 | } |
5705 | |
5706 | public: |
5707 | using qual_iterator = ObjCProtocolDecl * const *; |
5708 | using qual_range = llvm::iterator_range<qual_iterator>; |
5709 | |
5710 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5711 | qual_iterator qual_begin() const { return getProtocolStorage(); } |
5712 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } |
5713 | |
5714 | bool qual_empty() const { return getNumProtocols() == 0; } |
5715 | |
5716 | /// Return the number of qualifying protocols in this type, or 0 if |
5717 | /// there are none. |
5718 | unsigned getNumProtocols() const { |
5719 | return static_cast<const T*>(this)->getNumProtocolsImpl(); |
5720 | } |
5721 | |
5722 | /// Fetch a protocol by index. |
5723 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
5724 | assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access" ) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5724, __PRETTY_FUNCTION__)); |
5725 | return qual_begin()[I]; |
5726 | } |
5727 | |
5728 | /// Retrieve all of the protocol qualifiers. |
5729 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { |
5730 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); |
5731 | } |
5732 | }; |
5733 | |
5734 | /// Represents a type parameter type in Objective C. It can take |
5735 | /// a list of protocols. |
5736 | class ObjCTypeParamType : public Type, |
5737 | public ObjCProtocolQualifiers<ObjCTypeParamType>, |
5738 | public llvm::FoldingSetNode { |
5739 | friend class ASTContext; |
5740 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; |
5741 | |
5742 | /// The number of protocols stored on this type. |
5743 | unsigned NumProtocols : 6; |
5744 | |
5745 | ObjCTypeParamDecl *OTPDecl; |
5746 | |
5747 | /// The protocols are stored after the ObjCTypeParamType node. In the |
5748 | /// canonical type, the list of protocols are sorted alphabetically |
5749 | /// and uniqued. |
5750 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5751 | |
5752 | /// Return the number of qualifying protocols in this interface type, |
5753 | /// or 0 if there are none. |
5754 | unsigned getNumProtocolsImpl() const { |
5755 | return NumProtocols; |
5756 | } |
5757 | |
5758 | void setNumProtocolsImpl(unsigned N) { |
5759 | NumProtocols = N; |
5760 | } |
5761 | |
5762 | ObjCTypeParamType(const ObjCTypeParamDecl *D, |
5763 | QualType can, |
5764 | ArrayRef<ObjCProtocolDecl *> protocols); |
5765 | |
5766 | public: |
5767 | bool isSugared() const { return true; } |
5768 | QualType desugar() const { return getCanonicalTypeInternal(); } |
5769 | |
5770 | static bool classof(const Type *T) { |
5771 | return T->getTypeClass() == ObjCTypeParam; |
5772 | } |
5773 | |
5774 | void Profile(llvm::FoldingSetNodeID &ID); |
5775 | static void Profile(llvm::FoldingSetNodeID &ID, |
5776 | const ObjCTypeParamDecl *OTPDecl, |
5777 | QualType CanonicalType, |
5778 | ArrayRef<ObjCProtocolDecl *> protocols); |
5779 | |
5780 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } |
5781 | }; |
5782 | |
5783 | /// Represents a class type in Objective C. |
5784 | /// |
5785 | /// Every Objective C type is a combination of a base type, a set of |
5786 | /// type arguments (optional, for parameterized classes) and a list of |
5787 | /// protocols. |
5788 | /// |
5789 | /// Given the following declarations: |
5790 | /// \code |
5791 | /// \@class C<T>; |
5792 | /// \@protocol P; |
5793 | /// \endcode |
5794 | /// |
5795 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType |
5796 | /// with base C and no protocols. |
5797 | /// |
5798 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. |
5799 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no |
5800 | /// protocol list. |
5801 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', |
5802 | /// and protocol list [P]. |
5803 | /// |
5804 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose |
5805 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType |
5806 | /// and no protocols. |
5807 | /// |
5808 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType |
5809 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually |
5810 | /// this should get its own sugar class to better represent the source. |
5811 | class ObjCObjectType : public Type, |
5812 | public ObjCProtocolQualifiers<ObjCObjectType> { |
5813 | friend class ObjCProtocolQualifiers<ObjCObjectType>; |
5814 | |
5815 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored |
5816 | // after the ObjCObjectPointerType node. |
5817 | // ObjCObjectType.NumProtocols - the number of protocols stored |
5818 | // after the type arguments of ObjCObjectPointerType node. |
5819 | // |
5820 | // These protocols are those written directly on the type. If |
5821 | // protocol qualifiers ever become additive, the iterators will need |
5822 | // to get kindof complicated. |
5823 | // |
5824 | // In the canonical object type, these are sorted alphabetically |
5825 | // and uniqued. |
5826 | |
5827 | /// Either a BuiltinType or an InterfaceType or sugar for either. |
5828 | QualType BaseType; |
5829 | |
5830 | /// Cached superclass type. |
5831 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> |
5832 | CachedSuperClassType; |
5833 | |
5834 | QualType *getTypeArgStorage(); |
5835 | const QualType *getTypeArgStorage() const { |
5836 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); |
5837 | } |
5838 | |
5839 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5840 | /// Return the number of qualifying protocols in this interface type, |
5841 | /// or 0 if there are none. |
5842 | unsigned getNumProtocolsImpl() const { |
5843 | return ObjCObjectTypeBits.NumProtocols; |
5844 | } |
5845 | void setNumProtocolsImpl(unsigned N) { |
5846 | ObjCObjectTypeBits.NumProtocols = N; |
5847 | } |
5848 | |
5849 | protected: |
5850 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; |
5851 | |
5852 | ObjCObjectType(QualType Canonical, QualType Base, |
5853 | ArrayRef<QualType> typeArgs, |
5854 | ArrayRef<ObjCProtocolDecl *> protocols, |
5855 | bool isKindOf); |
5856 | |
5857 | ObjCObjectType(enum Nonce_ObjCInterface) |
5858 | : Type(ObjCInterface, QualType(), TypeDependence::None), |
5859 | BaseType(QualType(this_(), 0)) { |
5860 | ObjCObjectTypeBits.NumProtocols = 0; |
5861 | ObjCObjectTypeBits.NumTypeArgs = 0; |
5862 | ObjCObjectTypeBits.IsKindOf = 0; |
5863 | } |
5864 | |
5865 | void computeSuperClassTypeSlow() const; |
5866 | |
5867 | public: |
5868 | /// Gets the base type of this object type. This is always (possibly |
5869 | /// sugar for) one of: |
5870 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the |
5871 | /// user, which is a typedef for an ObjCObjectPointerType) |
5872 | /// - the 'Class' builtin type (same caveat) |
5873 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) |
5874 | QualType getBaseType() const { return BaseType; } |
5875 | |
5876 | bool isObjCId() const { |
5877 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); |
5878 | } |
5879 | |
5880 | bool isObjCClass() const { |
5881 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); |
5882 | } |
5883 | |
5884 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } |
5885 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } |
5886 | bool isObjCUnqualifiedIdOrClass() const { |
5887 | if (!qual_empty()) return false; |
5888 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) |
5889 | return T->getKind() == BuiltinType::ObjCId || |
5890 | T->getKind() == BuiltinType::ObjCClass; |
5891 | return false; |
5892 | } |
5893 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } |
5894 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } |
5895 | |
5896 | /// Gets the interface declaration for this object type, if the base type |
5897 | /// really is an interface. |
5898 | ObjCInterfaceDecl *getInterface() const; |
5899 | |
5900 | /// Determine whether this object type is "specialized", meaning |
5901 | /// that it has type arguments. |
5902 | bool isSpecialized() const; |
5903 | |
5904 | /// Determine whether this object type was written with type arguments. |
5905 | bool isSpecializedAsWritten() const { |
5906 | return ObjCObjectTypeBits.NumTypeArgs > 0; |
5907 | } |
5908 | |
5909 | /// Determine whether this object type is "unspecialized", meaning |
5910 | /// that it has no type arguments. |
5911 | bool isUnspecialized() const { return !isSpecialized(); } |
5912 | |
5913 | /// Determine whether this object type is "unspecialized" as |
5914 | /// written, meaning that it has no type arguments. |
5915 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5916 | |
5917 | /// Retrieve the type arguments of this object type (semantically). |
5918 | ArrayRef<QualType> getTypeArgs() const; |
5919 | |
5920 | /// Retrieve the type arguments of this object type as they were |
5921 | /// written. |
5922 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5923 | return llvm::makeArrayRef(getTypeArgStorage(), |
5924 | ObjCObjectTypeBits.NumTypeArgs); |
5925 | } |
5926 | |
5927 | /// Whether this is a "__kindof" type as written. |
5928 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } |
5929 | |
5930 | /// Whether this ia a "__kindof" type (semantically). |
5931 | bool isKindOfType() const; |
5932 | |
5933 | /// Retrieve the type of the superclass of this object type. |
5934 | /// |
5935 | /// This operation substitutes any type arguments into the |
5936 | /// superclass of the current class type, potentially producing a |
5937 | /// specialization of the superclass type. Produces a null type if |
5938 | /// there is no superclass. |
5939 | QualType getSuperClassType() const { |
5940 | if (!CachedSuperClassType.getInt()) |
5941 | computeSuperClassTypeSlow(); |
5942 | |
5943 | assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?" ) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 5943, __PRETTY_FUNCTION__)); |
5944 | return QualType(CachedSuperClassType.getPointer(), 0); |
5945 | } |
5946 | |
5947 | /// Strip off the Objective-C "kindof" type and (with it) any |
5948 | /// protocol qualifiers. |
5949 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; |
5950 | |
5951 | bool isSugared() const { return false; } |
5952 | QualType desugar() const { return QualType(this, 0); } |
5953 | |
5954 | static bool classof(const Type *T) { |
5955 | return T->getTypeClass() == ObjCObject || |
5956 | T->getTypeClass() == ObjCInterface; |
5957 | } |
5958 | }; |
5959 | |
5960 | /// A class providing a concrete implementation |
5961 | /// of ObjCObjectType, so as to not increase the footprint of |
5962 | /// ObjCInterfaceType. Code outside of ASTContext and the core type |
5963 | /// system should not reference this type. |
5964 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { |
5965 | friend class ASTContext; |
5966 | |
5967 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() |
5968 | // will need to be modified. |
5969 | |
5970 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, |
5971 | ArrayRef<QualType> typeArgs, |
5972 | ArrayRef<ObjCProtocolDecl *> protocols, |
5973 | bool isKindOf) |
5974 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} |
5975 | |
5976 | public: |
5977 | void Profile(llvm::FoldingSetNodeID &ID); |
5978 | static void Profile(llvm::FoldingSetNodeID &ID, |
5979 | QualType Base, |
5980 | ArrayRef<QualType> typeArgs, |
5981 | ArrayRef<ObjCProtocolDecl *> protocols, |
5982 | bool isKindOf); |
5983 | }; |
5984 | |
5985 | inline QualType *ObjCObjectType::getTypeArgStorage() { |
5986 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); |
5987 | } |
5988 | |
5989 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { |
5990 | return reinterpret_cast<ObjCProtocolDecl**>( |
5991 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); |
5992 | } |
5993 | |
5994 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { |
5995 | return reinterpret_cast<ObjCProtocolDecl**>( |
5996 | static_cast<ObjCTypeParamType*>(this)+1); |
5997 | } |
5998 | |
5999 | /// Interfaces are the core concept in Objective-C for object oriented design. |
6000 | /// They basically correspond to C++ classes. There are two kinds of interface |
6001 | /// types: normal interfaces like `NSString`, and qualified interfaces, which |
6002 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. |
6003 | /// |
6004 | /// ObjCInterfaceType guarantees the following properties when considered |
6005 | /// as a subtype of its superclass, ObjCObjectType: |
6006 | /// - There are no protocol qualifiers. To reinforce this, code which |
6007 | /// tries to invoke the protocol methods via an ObjCInterfaceType will |
6008 | /// fail to compile. |
6009 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, |
6010 | /// T->getBaseType() == QualType(T, 0). |
6011 | class ObjCInterfaceType : public ObjCObjectType { |
6012 | friend class ASTContext; // ASTContext creates these. |
6013 | friend class ASTReader; |
6014 | friend class ObjCInterfaceDecl; |
6015 | template <class T> friend class serialization::AbstractTypeReader; |
6016 | |
6017 | mutable ObjCInterfaceDecl *Decl; |
6018 | |
6019 | ObjCInterfaceType(const ObjCInterfaceDecl *D) |
6020 | : ObjCObjectType(Nonce_ObjCInterface), |
6021 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} |
6022 | |
6023 | public: |
6024 | /// Get the declaration of this interface. |
6025 | ObjCInterfaceDecl *getDecl() const { return Decl; } |
6026 | |
6027 | bool isSugared() const { return false; } |
6028 | QualType desugar() const { return QualType(this, 0); } |
6029 | |
6030 | static bool classof(const Type *T) { |
6031 | return T->getTypeClass() == ObjCInterface; |
6032 | } |
6033 | |
6034 | // Nonsense to "hide" certain members of ObjCObjectType within this |
6035 | // class. People asking for protocols on an ObjCInterfaceType are |
6036 | // not going to get what they want: ObjCInterfaceTypes are |
6037 | // guaranteed to have no protocols. |
6038 | enum { |
6039 | qual_iterator, |
6040 | qual_begin, |
6041 | qual_end, |
6042 | getNumProtocols, |
6043 | getProtocol |
6044 | }; |
6045 | }; |
6046 | |
6047 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { |
6048 | QualType baseType = getBaseType(); |
6049 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { |
6050 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) |
6051 | return T->getDecl(); |
6052 | |
6053 | baseType = ObjT->getBaseType(); |
6054 | } |
6055 | |
6056 | return nullptr; |
6057 | } |
6058 | |
6059 | /// Represents a pointer to an Objective C object. |
6060 | /// |
6061 | /// These are constructed from pointer declarators when the pointee type is |
6062 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' |
6063 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' |
6064 | /// and 'Class<P>' are translated into these. |
6065 | /// |
6066 | /// Pointers to pointers to Objective C objects are still PointerTypes; |
6067 | /// only the first level of pointer gets it own type implementation. |
6068 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { |
6069 | friend class ASTContext; // ASTContext creates these. |
6070 | |
6071 | QualType PointeeType; |
6072 | |
6073 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) |
6074 | : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()), |
6075 | PointeeType(Pointee) {} |
6076 | |
6077 | public: |
6078 | /// Gets the type pointed to by this ObjC pointer. |
6079 | /// The result will always be an ObjCObjectType or sugar thereof. |
6080 | QualType getPointeeType() const { return PointeeType; } |
6081 | |
6082 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. |
6083 | /// |
6084 | /// This method is equivalent to getPointeeType() except that |
6085 | /// it discards any typedefs (or other sugar) between this |
6086 | /// type and the "outermost" object type. So for: |
6087 | /// \code |
6088 | /// \@class A; \@protocol P; \@protocol Q; |
6089 | /// typedef A<P> AP; |
6090 | /// typedef A A1; |
6091 | /// typedef A1<P> A1P; |
6092 | /// typedef A1P<Q> A1PQ; |
6093 | /// \endcode |
6094 | /// For 'A*', getObjectType() will return 'A'. |
6095 | /// For 'A<P>*', getObjectType() will return 'A<P>'. |
6096 | /// For 'AP*', getObjectType() will return 'A<P>'. |
6097 | /// For 'A1*', getObjectType() will return 'A'. |
6098 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. |
6099 | /// For 'A1P*', getObjectType() will return 'A1<P>'. |
6100 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because |
6101 | /// adding protocols to a protocol-qualified base discards the |
6102 | /// old qualifiers (for now). But if it didn't, getObjectType() |
6103 | /// would return 'A1P<Q>' (and we'd have to make iterating over |
6104 | /// qualifiers more complicated). |
6105 | const ObjCObjectType *getObjectType() const { |
6106 | return PointeeType->castAs<ObjCObjectType>(); |
6107 | } |
6108 | |
6109 | /// If this pointer points to an Objective C |
6110 | /// \@interface type, gets the type for that interface. Any protocol |
6111 | /// qualifiers on the interface are ignored. |
6112 | /// |
6113 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6114 | const ObjCInterfaceType *getInterfaceType() const; |
6115 | |
6116 | /// If this pointer points to an Objective \@interface |
6117 | /// type, gets the declaration for that interface. |
6118 | /// |
6119 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6120 | ObjCInterfaceDecl *getInterfaceDecl() const { |
6121 | return getObjectType()->getInterface(); |
6122 | } |
6123 | |
6124 | /// True if this is equivalent to the 'id' type, i.e. if |
6125 | /// its object type is the primitive 'id' type with no protocols. |
6126 | bool isObjCIdType() const { |
6127 | return getObjectType()->isObjCUnqualifiedId(); |
6128 | } |
6129 | |
6130 | /// True if this is equivalent to the 'Class' type, |
6131 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. |
6132 | bool isObjCClassType() const { |
6133 | return getObjectType()->isObjCUnqualifiedClass(); |
6134 | } |
6135 | |
6136 | /// True if this is equivalent to the 'id' or 'Class' type, |
6137 | bool isObjCIdOrClassType() const { |
6138 | return getObjectType()->isObjCUnqualifiedIdOrClass(); |
6139 | } |
6140 | |
6141 | /// True if this is equivalent to 'id<P>' for some non-empty set of |
6142 | /// protocols. |
6143 | bool isObjCQualifiedIdType() const { |
6144 | return getObjectType()->isObjCQualifiedId(); |
6145 | } |
6146 | |
6147 | /// True if this is equivalent to 'Class<P>' for some non-empty set of |
6148 | /// protocols. |
6149 | bool isObjCQualifiedClassType() const { |
6150 | return getObjectType()->isObjCQualifiedClass(); |
6151 | } |
6152 | |
6153 | /// Whether this is a "__kindof" type. |
6154 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } |
6155 | |
6156 | /// Whether this type is specialized, meaning that it has type arguments. |
6157 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } |
6158 | |
6159 | /// Whether this type is specialized, meaning that it has type arguments. |
6160 | bool isSpecializedAsWritten() const { |
6161 | return getObjectType()->isSpecializedAsWritten(); |
6162 | } |
6163 | |
6164 | /// Whether this type is unspecialized, meaning that is has no type arguments. |
6165 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } |
6166 | |
6167 | /// Determine whether this object type is "unspecialized" as |
6168 | /// written, meaning that it has no type arguments. |
6169 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
6170 | |
6171 | /// Retrieve the type arguments for this type. |
6172 | ArrayRef<QualType> getTypeArgs() const { |
6173 | return getObjectType()->getTypeArgs(); |
6174 | } |
6175 | |
6176 | /// Retrieve the type arguments for this type. |
6177 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
6178 | return getObjectType()->getTypeArgsAsWritten(); |
6179 | } |
6180 | |
6181 | /// An iterator over the qualifiers on the object type. Provided |
6182 | /// for convenience. This will always iterate over the full set of |
6183 | /// protocols on a type, not just those provided directly. |
6184 | using qual_iterator = ObjCObjectType::qual_iterator; |
6185 | using qual_range = llvm::iterator_range<qual_iterator>; |
6186 | |
6187 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
6188 | |
6189 | qual_iterator qual_begin() const { |
6190 | return getObjectType()->qual_begin(); |
6191 | } |
6192 | |
6193 | qual_iterator qual_end() const { |
6194 | return getObjectType()->qual_end(); |
6195 | } |
6196 | |
6197 | bool qual_empty() const { return getObjectType()->qual_empty(); } |
6198 | |
6199 | /// Return the number of qualifying protocols on the object type. |
6200 | unsigned getNumProtocols() const { |
6201 | return getObjectType()->getNumProtocols(); |
6202 | } |
6203 | |
6204 | /// Retrieve a qualifying protocol by index on the object type. |
6205 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
6206 | return getObjectType()->getProtocol(I); |
6207 | } |
6208 | |
6209 | bool isSugared() const { return false; } |
6210 | QualType desugar() const { return QualType(this, 0); } |
6211 | |
6212 | /// Retrieve the type of the superclass of this object pointer type. |
6213 | /// |
6214 | /// This operation substitutes any type arguments into the |
6215 | /// superclass of the current class type, potentially producing a |
6216 | /// pointer to a specialization of the superclass type. Produces a |
6217 | /// null type if there is no superclass. |
6218 | QualType getSuperClassType() const; |
6219 | |
6220 | /// Strip off the Objective-C "kindof" type and (with it) any |
6221 | /// protocol qualifiers. |
6222 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( |
6223 | const ASTContext &ctx) const; |
6224 | |
6225 | void Profile(llvm::FoldingSetNodeID &ID) { |
6226 | Profile(ID, getPointeeType()); |
6227 | } |
6228 | |
6229 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6230 | ID.AddPointer(T.getAsOpaquePtr()); |
6231 | } |
6232 | |
6233 | static bool classof(const Type *T) { |
6234 | return T->getTypeClass() == ObjCObjectPointer; |
6235 | } |
6236 | }; |
6237 | |
6238 | class AtomicType : public Type, public llvm::FoldingSetNode { |
6239 | friend class ASTContext; // ASTContext creates these. |
6240 | |
6241 | QualType ValueType; |
6242 | |
6243 | AtomicType(QualType ValTy, QualType Canonical) |
6244 | : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {} |
6245 | |
6246 | public: |
6247 | /// Gets the type contained by this atomic type, i.e. |
6248 | /// the type returned by performing an atomic load of this atomic type. |
6249 | QualType getValueType() const { return ValueType; } |
6250 | |
6251 | bool isSugared() const { return false; } |
6252 | QualType desugar() const { return QualType(this, 0); } |
6253 | |
6254 | void Profile(llvm::FoldingSetNodeID &ID) { |
6255 | Profile(ID, getValueType()); |
6256 | } |
6257 | |
6258 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6259 | ID.AddPointer(T.getAsOpaquePtr()); |
6260 | } |
6261 | |
6262 | static bool classof(const Type *T) { |
6263 | return T->getTypeClass() == Atomic; |
6264 | } |
6265 | }; |
6266 | |
6267 | /// PipeType - OpenCL20. |
6268 | class PipeType : public Type, public llvm::FoldingSetNode { |
6269 | friend class ASTContext; // ASTContext creates these. |
6270 | |
6271 | QualType ElementType; |
6272 | bool isRead; |
6273 | |
6274 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) |
6275 | : Type(Pipe, CanonicalPtr, elemType->getDependence()), |
6276 | ElementType(elemType), isRead(isRead) {} |
6277 | |
6278 | public: |
6279 | QualType getElementType() const { return ElementType; } |
6280 | |
6281 | bool isSugared() const { return false; } |
6282 | |
6283 | QualType desugar() const { return QualType(this, 0); } |
6284 | |
6285 | void Profile(llvm::FoldingSetNodeID &ID) { |
6286 | Profile(ID, getElementType(), isReadOnly()); |
6287 | } |
6288 | |
6289 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { |
6290 | ID.AddPointer(T.getAsOpaquePtr()); |
6291 | ID.AddBoolean(isRead); |
6292 | } |
6293 | |
6294 | static bool classof(const Type *T) { |
6295 | return T->getTypeClass() == Pipe; |
6296 | } |
6297 | |
6298 | bool isReadOnly() const { return isRead; } |
6299 | }; |
6300 | |
6301 | /// A fixed int type of a specified bitwidth. |
6302 | class ExtIntType final : public Type, public llvm::FoldingSetNode { |
6303 | friend class ASTContext; |
6304 | unsigned IsUnsigned : 1; |
6305 | unsigned NumBits : 24; |
6306 | |
6307 | protected: |
6308 | ExtIntType(bool isUnsigned, unsigned NumBits); |
6309 | |
6310 | public: |
6311 | bool isUnsigned() const { return IsUnsigned; } |
6312 | bool isSigned() const { return !IsUnsigned; } |
6313 | unsigned getNumBits() const { return NumBits; } |
6314 | |
6315 | bool isSugared() const { return false; } |
6316 | QualType desugar() const { return QualType(this, 0); } |
6317 | |
6318 | void Profile(llvm::FoldingSetNodeID &ID) { |
6319 | Profile(ID, isUnsigned(), getNumBits()); |
6320 | } |
6321 | |
6322 | static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned, |
6323 | unsigned NumBits) { |
6324 | ID.AddBoolean(IsUnsigned); |
6325 | ID.AddInteger(NumBits); |
6326 | } |
6327 | |
6328 | static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; } |
6329 | }; |
6330 | |
6331 | class DependentExtIntType final : public Type, public llvm::FoldingSetNode { |
6332 | friend class ASTContext; |
6333 | const ASTContext &Context; |
6334 | llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned; |
6335 | |
6336 | protected: |
6337 | DependentExtIntType(const ASTContext &Context, bool IsUnsigned, |
6338 | Expr *NumBits); |
6339 | |
6340 | public: |
6341 | bool isUnsigned() const; |
6342 | bool isSigned() const { return !isUnsigned(); } |
6343 | Expr *getNumBitsExpr() const; |
6344 | |
6345 | bool isSugared() const { return false; } |
6346 | QualType desugar() const { return QualType(this, 0); } |
6347 | |
6348 | void Profile(llvm::FoldingSetNodeID &ID) { |
6349 | Profile(ID, Context, isUnsigned(), getNumBitsExpr()); |
6350 | } |
6351 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
6352 | bool IsUnsigned, Expr *NumBitsExpr); |
6353 | |
6354 | static bool classof(const Type *T) { |
6355 | return T->getTypeClass() == DependentExtInt; |
6356 | } |
6357 | }; |
6358 | |
6359 | /// A qualifier set is used to build a set of qualifiers. |
6360 | class QualifierCollector : public Qualifiers { |
6361 | public: |
6362 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} |
6363 | |
6364 | /// Collect any qualifiers on the given type and return an |
6365 | /// unqualified type. The qualifiers are assumed to be consistent |
6366 | /// with those already in the type. |
6367 | const Type *strip(QualType type) { |
6368 | addFastQualifiers(type.getLocalFastQualifiers()); |
6369 | if (!type.hasLocalNonFastQualifiers()) |
6370 | return type.getTypePtrUnsafe(); |
6371 | |
6372 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); |
6373 | addConsistentQualifiers(extQuals->getQualifiers()); |
6374 | return extQuals->getBaseType(); |
6375 | } |
6376 | |
6377 | /// Apply the collected qualifiers to the given type. |
6378 | QualType apply(const ASTContext &Context, QualType QT) const; |
6379 | |
6380 | /// Apply the collected qualifiers to the given type. |
6381 | QualType apply(const ASTContext &Context, const Type* T) const; |
6382 | }; |
6383 | |
6384 | /// A container of type source information. |
6385 | /// |
6386 | /// A client can read the relevant info using TypeLoc wrappers, e.g: |
6387 | /// @code |
6388 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); |
6389 | /// TL.getBeginLoc().print(OS, SrcMgr); |
6390 | /// @endcode |
6391 | class alignas(8) TypeSourceInfo { |
6392 | // Contains a memory block after the class, used for type source information, |
6393 | // allocated by ASTContext. |
6394 | friend class ASTContext; |
6395 | |
6396 | QualType Ty; |
6397 | |
6398 | TypeSourceInfo(QualType ty) : Ty(ty) {} |
6399 | |
6400 | public: |
6401 | /// Return the type wrapped by this type source info. |
6402 | QualType getType() const { return Ty; } |
6403 | |
6404 | /// Return the TypeLoc wrapper for the type source info. |
6405 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h |
6406 | |
6407 | /// Override the type stored in this TypeSourceInfo. Use with caution! |
6408 | void overrideType(QualType T) { Ty = T; } |
6409 | }; |
6410 | |
6411 | // Inline function definitions. |
6412 | |
6413 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { |
6414 | SplitQualType desugar = |
6415 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); |
6416 | desugar.Quals.addConsistentQualifiers(Quals); |
6417 | return desugar; |
6418 | } |
6419 | |
6420 | inline const Type *QualType::getTypePtr() const { |
6421 | return getCommonPtr()->BaseType; |
6422 | } |
6423 | |
6424 | inline const Type *QualType::getTypePtrOrNull() const { |
6425 | return (isNull() ? nullptr : getCommonPtr()->BaseType); |
6426 | } |
6427 | |
6428 | inline SplitQualType QualType::split() const { |
6429 | if (!hasLocalNonFastQualifiers()) |
6430 | return SplitQualType(getTypePtrUnsafe(), |
6431 | Qualifiers::fromFastMask(getLocalFastQualifiers())); |
6432 | |
6433 | const ExtQuals *eq = getExtQualsUnsafe(); |
6434 | Qualifiers qs = eq->getQualifiers(); |
6435 | qs.addFastQualifiers(getLocalFastQualifiers()); |
6436 | return SplitQualType(eq->getBaseType(), qs); |
6437 | } |
6438 | |
6439 | inline Qualifiers QualType::getLocalQualifiers() const { |
6440 | Qualifiers Quals; |
6441 | if (hasLocalNonFastQualifiers()) |
6442 | Quals = getExtQualsUnsafe()->getQualifiers(); |
6443 | Quals.addFastQualifiers(getLocalFastQualifiers()); |
6444 | return Quals; |
6445 | } |
6446 | |
6447 | inline Qualifiers QualType::getQualifiers() const { |
6448 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); |
6449 | quals.addFastQualifiers(getLocalFastQualifiers()); |
6450 | return quals; |
6451 | } |
6452 | |
6453 | inline unsigned QualType::getCVRQualifiers() const { |
6454 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); |
6455 | cvr |= getLocalCVRQualifiers(); |
6456 | return cvr; |
6457 | } |
6458 | |
6459 | inline QualType QualType::getCanonicalType() const { |
6460 | QualType canon = getCommonPtr()->CanonicalType; |
6461 | return canon.withFastQualifiers(getLocalFastQualifiers()); |
6462 | } |
6463 | |
6464 | inline bool QualType::isCanonical() const { |
6465 | return getTypePtr()->isCanonicalUnqualified(); |
6466 | } |
6467 | |
6468 | inline bool QualType::isCanonicalAsParam() const { |
6469 | if (!isCanonical()) return false; |
6470 | if (hasLocalQualifiers()) return false; |
6471 | |
6472 | const Type *T = getTypePtr(); |
6473 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) |
6474 | return false; |
6475 | |
6476 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); |
6477 | } |
6478 | |
6479 | inline bool QualType::isConstQualified() const { |
6480 | return isLocalConstQualified() || |
6481 | getCommonPtr()->CanonicalType.isLocalConstQualified(); |
6482 | } |
6483 | |
6484 | inline bool QualType::isRestrictQualified() const { |
6485 | return isLocalRestrictQualified() || |
6486 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); |
6487 | } |
6488 | |
6489 | |
6490 | inline bool QualType::isVolatileQualified() const { |
6491 | return isLocalVolatileQualified() || |
6492 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); |
6493 | } |
6494 | |
6495 | inline bool QualType::hasQualifiers() const { |
6496 | return hasLocalQualifiers() || |
6497 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); |
6498 | } |
6499 | |
6500 | inline QualType QualType::getUnqualifiedType() const { |
6501 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6502 | return QualType(getTypePtr(), 0); |
6503 | |
6504 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); |
6505 | } |
6506 | |
6507 | inline SplitQualType QualType::getSplitUnqualifiedType() const { |
6508 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6509 | return split(); |
6510 | |
6511 | return getSplitUnqualifiedTypeImpl(*this); |
6512 | } |
6513 | |
6514 | inline void QualType::removeLocalConst() { |
6515 | removeLocalFastQualifiers(Qualifiers::Const); |
6516 | } |
6517 | |
6518 | inline void QualType::removeLocalRestrict() { |
6519 | removeLocalFastQualifiers(Qualifiers::Restrict); |
6520 | } |
6521 | |
6522 | inline void QualType::removeLocalVolatile() { |
6523 | removeLocalFastQualifiers(Qualifiers::Volatile); |
6524 | } |
6525 | |
6526 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { |
6527 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 6527, __PRETTY_FUNCTION__)); |
6528 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, |
6529 | "Fast bits differ from CVR bits!"); |
6530 | |
6531 | // Fast path: we don't need to touch the slow qualifiers. |
6532 | removeLocalFastQualifiers(Mask); |
6533 | } |
6534 | |
6535 | /// Check if this type has any address space qualifier. |
6536 | inline bool QualType::hasAddressSpace() const { |
6537 | return getQualifiers().hasAddressSpace(); |
6538 | } |
6539 | |
6540 | /// Return the address space of this type. |
6541 | inline LangAS QualType::getAddressSpace() const { |
6542 | return getQualifiers().getAddressSpace(); |
6543 | } |
6544 | |
6545 | /// Return the gc attribute of this type. |
6546 | inline Qualifiers::GC QualType::getObjCGCAttr() const { |
6547 | return getQualifiers().getObjCGCAttr(); |
6548 | } |
6549 | |
6550 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
6551 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6552 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); |
6553 | return false; |
6554 | } |
6555 | |
6556 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { |
6557 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6558 | return hasNonTrivialToPrimitiveDestructCUnion(RD); |
6559 | return false; |
6560 | } |
6561 | |
6562 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { |
6563 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6564 | return hasNonTrivialToPrimitiveCopyCUnion(RD); |
6565 | return false; |
6566 | } |
6567 | |
6568 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { |
6569 | if (const auto *PT = t.getAs<PointerType>()) { |
6570 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) |
6571 | return FT->getExtInfo(); |
6572 | } else if (const auto *FT = t.getAs<FunctionType>()) |
6573 | return FT->getExtInfo(); |
6574 | |
6575 | return FunctionType::ExtInfo(); |
6576 | } |
6577 | |
6578 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { |
6579 | return getFunctionExtInfo(*t); |
6580 | } |
6581 | |
6582 | /// Determine whether this type is more |
6583 | /// qualified than the Other type. For example, "const volatile int" |
6584 | /// is more qualified than "const int", "volatile int", and |
6585 | /// "int". However, it is not more qualified than "const volatile |
6586 | /// int". |
6587 | inline bool QualType::isMoreQualifiedThan(QualType other) const { |
6588 | Qualifiers MyQuals = getQualifiers(); |
6589 | Qualifiers OtherQuals = other.getQualifiers(); |
6590 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); |
6591 | } |
6592 | |
6593 | /// Determine whether this type is at last |
6594 | /// as qualified as the Other type. For example, "const volatile |
6595 | /// int" is at least as qualified as "const int", "volatile int", |
6596 | /// "int", and "const volatile int". |
6597 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { |
6598 | Qualifiers OtherQuals = other.getQualifiers(); |
6599 | |
6600 | // Ignore __unaligned qualifier if this type is a void. |
6601 | if (getUnqualifiedType()->isVoidType()) |
6602 | OtherQuals.removeUnaligned(); |
6603 | |
6604 | return getQualifiers().compatiblyIncludes(OtherQuals); |
6605 | } |
6606 | |
6607 | /// If Type is a reference type (e.g., const |
6608 | /// int&), returns the type that the reference refers to ("const |
6609 | /// int"). Otherwise, returns the type itself. This routine is used |
6610 | /// throughout Sema to implement C++ 5p6: |
6611 | /// |
6612 | /// If an expression initially has the type "reference to T" (8.3.2, |
6613 | /// 8.5.3), the type is adjusted to "T" prior to any further |
6614 | /// analysis, the expression designates the object or function |
6615 | /// denoted by the reference, and the expression is an lvalue. |
6616 | inline QualType QualType::getNonReferenceType() const { |
6617 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) |
6618 | return RefType->getPointeeType(); |
6619 | else |
6620 | return *this; |
6621 | } |
6622 | |
6623 | inline bool QualType::isCForbiddenLValueType() const { |
6624 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || |
6625 | getTypePtr()->isFunctionType()); |
6626 | } |
6627 | |
6628 | /// Tests whether the type is categorized as a fundamental type. |
6629 | /// |
6630 | /// \returns True for types specified in C++0x [basic.fundamental]. |
6631 | inline bool Type::isFundamentalType() const { |
6632 | return isVoidType() || |
6633 | isNullPtrType() || |
6634 | // FIXME: It's really annoying that we don't have an |
6635 | // 'isArithmeticType()' which agrees with the standard definition. |
6636 | (isArithmeticType() && !isEnumeralType()); |
6637 | } |
6638 | |
6639 | /// Tests whether the type is categorized as a compound type. |
6640 | /// |
6641 | /// \returns True for types specified in C++0x [basic.compound]. |
6642 | inline bool Type::isCompoundType() const { |
6643 | // C++0x [basic.compound]p1: |
6644 | // Compound types can be constructed in the following ways: |
6645 | // -- arrays of objects of a given type [...]; |
6646 | return isArrayType() || |
6647 | // -- functions, which have parameters of given types [...]; |
6648 | isFunctionType() || |
6649 | // -- pointers to void or objects or functions [...]; |
6650 | isPointerType() || |
6651 | // -- references to objects or functions of a given type. [...] |
6652 | isReferenceType() || |
6653 | // -- classes containing a sequence of objects of various types, [...]; |
6654 | isRecordType() || |
6655 | // -- unions, which are classes capable of containing objects of different |
6656 | // types at different times; |
6657 | isUnionType() || |
6658 | // -- enumerations, which comprise a set of named constant values. [...]; |
6659 | isEnumeralType() || |
6660 | // -- pointers to non-static class members, [...]. |
6661 | isMemberPointerType(); |
6662 | } |
6663 | |
6664 | inline bool Type::isFunctionType() const { |
6665 | return isa<FunctionType>(CanonicalType); |
6666 | } |
6667 | |
6668 | inline bool Type::isPointerType() const { |
6669 | return isa<PointerType>(CanonicalType); |
6670 | } |
6671 | |
6672 | inline bool Type::isAnyPointerType() const { |
6673 | return isPointerType() || isObjCObjectPointerType(); |
6674 | } |
6675 | |
6676 | inline bool Type::isBlockPointerType() const { |
6677 | return isa<BlockPointerType>(CanonicalType); |
6678 | } |
6679 | |
6680 | inline bool Type::isReferenceType() const { |
6681 | return isa<ReferenceType>(CanonicalType); |
6682 | } |
6683 | |
6684 | inline bool Type::isLValueReferenceType() const { |
6685 | return isa<LValueReferenceType>(CanonicalType); |
6686 | } |
6687 | |
6688 | inline bool Type::isRValueReferenceType() const { |
6689 | return isa<RValueReferenceType>(CanonicalType); |
6690 | } |
6691 | |
6692 | inline bool Type::isObjectPointerType() const { |
6693 | // Note: an "object pointer type" is not the same thing as a pointer to an |
6694 | // object type; rather, it is a pointer to an object type or a pointer to cv |
6695 | // void. |
6696 | if (const auto *T = getAs<PointerType>()) |
6697 | return !T->getPointeeType()->isFunctionType(); |
6698 | else |
6699 | return false; |
6700 | } |
6701 | |
6702 | inline bool Type::isFunctionPointerType() const { |
6703 | if (const auto *T = getAs<PointerType>()) |
6704 | return T->getPointeeType()->isFunctionType(); |
6705 | else |
6706 | return false; |
6707 | } |
6708 | |
6709 | inline bool Type::isFunctionReferenceType() const { |
6710 | if (const auto *T = getAs<ReferenceType>()) |
6711 | return T->getPointeeType()->isFunctionType(); |
6712 | else |
6713 | return false; |
6714 | } |
6715 | |
6716 | inline bool Type::isMemberPointerType() const { |
6717 | return isa<MemberPointerType>(CanonicalType); |
6718 | } |
6719 | |
6720 | inline bool Type::isMemberFunctionPointerType() const { |
6721 | if (const auto *T = getAs<MemberPointerType>()) |
6722 | return T->isMemberFunctionPointer(); |
6723 | else |
6724 | return false; |
6725 | } |
6726 | |
6727 | inline bool Type::isMemberDataPointerType() const { |
6728 | if (const auto *T = getAs<MemberPointerType>()) |
6729 | return T->isMemberDataPointer(); |
6730 | else |
6731 | return false; |
6732 | } |
6733 | |
6734 | inline bool Type::isArrayType() const { |
6735 | return isa<ArrayType>(CanonicalType); |
6736 | } |
6737 | |
6738 | inline bool Type::isConstantArrayType() const { |
6739 | return isa<ConstantArrayType>(CanonicalType); |
6740 | } |
6741 | |
6742 | inline bool Type::isIncompleteArrayType() const { |
6743 | return isa<IncompleteArrayType>(CanonicalType); |
6744 | } |
6745 | |
6746 | inline bool Type::isVariableArrayType() const { |
6747 | return isa<VariableArrayType>(CanonicalType); |
6748 | } |
6749 | |
6750 | inline bool Type::isDependentSizedArrayType() const { |
6751 | return isa<DependentSizedArrayType>(CanonicalType); |
6752 | } |
6753 | |
6754 | inline bool Type::isBuiltinType() const { |
6755 | return isa<BuiltinType>(CanonicalType); |
6756 | } |
6757 | |
6758 | inline bool Type::isRecordType() const { |
6759 | return isa<RecordType>(CanonicalType); |
6760 | } |
6761 | |
6762 | inline bool Type::isEnumeralType() const { |
6763 | return isa<EnumType>(CanonicalType); |
6764 | } |
6765 | |
6766 | inline bool Type::isAnyComplexType() const { |
6767 | return isa<ComplexType>(CanonicalType); |
6768 | } |
6769 | |
6770 | inline bool Type::isVectorType() const { |
6771 | return isa<VectorType>(CanonicalType); |
6772 | } |
6773 | |
6774 | inline bool Type::isExtVectorType() const { |
6775 | return isa<ExtVectorType>(CanonicalType); |
6776 | } |
6777 | |
6778 | inline bool Type::isMatrixType() const { |
6779 | return isa<MatrixType>(CanonicalType); |
6780 | } |
6781 | |
6782 | inline bool Type::isConstantMatrixType() const { |
6783 | return isa<ConstantMatrixType>(CanonicalType); |
6784 | } |
6785 | |
6786 | inline bool Type::isDependentAddressSpaceType() const { |
6787 | return isa<DependentAddressSpaceType>(CanonicalType); |
6788 | } |
6789 | |
6790 | inline bool Type::isObjCObjectPointerType() const { |
6791 | return isa<ObjCObjectPointerType>(CanonicalType); |
6792 | } |
6793 | |
6794 | inline bool Type::isObjCObjectType() const { |
6795 | return isa<ObjCObjectType>(CanonicalType); |
6796 | } |
6797 | |
6798 | inline bool Type::isObjCObjectOrInterfaceType() const { |
6799 | return isa<ObjCInterfaceType>(CanonicalType) || |
6800 | isa<ObjCObjectType>(CanonicalType); |
6801 | } |
6802 | |
6803 | inline bool Type::isAtomicType() const { |
6804 | return isa<AtomicType>(CanonicalType); |
6805 | } |
6806 | |
6807 | inline bool Type::isUndeducedAutoType() const { |
6808 | return isa<AutoType>(CanonicalType); |
6809 | } |
6810 | |
6811 | inline bool Type::isObjCQualifiedIdType() const { |
6812 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6813 | return OPT->isObjCQualifiedIdType(); |
6814 | return false; |
6815 | } |
6816 | |
6817 | inline bool Type::isObjCQualifiedClassType() const { |
6818 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6819 | return OPT->isObjCQualifiedClassType(); |
6820 | return false; |
6821 | } |
6822 | |
6823 | inline bool Type::isObjCIdType() const { |
6824 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6825 | return OPT->isObjCIdType(); |
6826 | return false; |
6827 | } |
6828 | |
6829 | inline bool Type::isObjCClassType() const { |
6830 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6831 | return OPT->isObjCClassType(); |
6832 | return false; |
6833 | } |
6834 | |
6835 | inline bool Type::isObjCSelType() const { |
6836 | if (const auto *OPT = getAs<PointerType>()) |
6837 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); |
6838 | return false; |
6839 | } |
6840 | |
6841 | inline bool Type::isObjCBuiltinType() const { |
6842 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); |
6843 | } |
6844 | |
6845 | inline bool Type::isDecltypeType() const { |
6846 | return isa<DecltypeType>(this); |
6847 | } |
6848 | |
6849 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
6850 | inline bool Type::is##Id##Type() const { \ |
6851 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6852 | } |
6853 | #include "clang/Basic/OpenCLImageTypes.def" |
6854 | |
6855 | inline bool Type::isSamplerT() const { |
6856 | return isSpecificBuiltinType(BuiltinType::OCLSampler); |
6857 | } |
6858 | |
6859 | inline bool Type::isEventT() const { |
6860 | return isSpecificBuiltinType(BuiltinType::OCLEvent); |
6861 | } |
6862 | |
6863 | inline bool Type::isClkEventT() const { |
6864 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); |
6865 | } |
6866 | |
6867 | inline bool Type::isQueueT() const { |
6868 | return isSpecificBuiltinType(BuiltinType::OCLQueue); |
6869 | } |
6870 | |
6871 | inline bool Type::isReserveIDT() const { |
6872 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); |
6873 | } |
6874 | |
6875 | inline bool Type::isImageType() const { |
6876 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || |
6877 | return |
6878 | #include "clang/Basic/OpenCLImageTypes.def" |
6879 | false; // end boolean or operation |
6880 | } |
6881 | |
6882 | inline bool Type::isPipeType() const { |
6883 | return isa<PipeType>(CanonicalType); |
6884 | } |
6885 | |
6886 | inline bool Type::isExtIntType() const { |
6887 | return isa<ExtIntType>(CanonicalType); |
6888 | } |
6889 | |
6890 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
6891 | inline bool Type::is##Id##Type() const { \ |
6892 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6893 | } |
6894 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6895 | |
6896 | inline bool Type::isOCLIntelSubgroupAVCType() const { |
6897 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ |
6898 | isOCLIntelSubgroupAVC##Id##Type() || |
6899 | return |
6900 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6901 | false; // end of boolean or operation |
6902 | } |
6903 | |
6904 | inline bool Type::isOCLExtOpaqueType() const { |
6905 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || |
6906 | return |
6907 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6908 | false; // end of boolean or operation |
6909 | } |
6910 | |
6911 | inline bool Type::isOpenCLSpecificType() const { |
6912 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || |
6913 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); |
6914 | } |
6915 | |
6916 | inline bool Type::isTemplateTypeParmType() const { |
6917 | return isa<TemplateTypeParmType>(CanonicalType); |
6918 | } |
6919 | |
6920 | inline bool Type::isSpecificBuiltinType(unsigned K) const { |
6921 | if (const BuiltinType *BT = getAs<BuiltinType>()) { |
6922 | return BT->getKind() == static_cast<BuiltinType::Kind>(K); |
6923 | } |
6924 | return false; |
6925 | } |
6926 | |
6927 | inline bool Type::isPlaceholderType() const { |
6928 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6929 | return BT->isPlaceholderType(); |
6930 | return false; |
6931 | } |
6932 | |
6933 | inline const BuiltinType *Type::getAsPlaceholderType() const { |
6934 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6935 | if (BT->isPlaceholderType()) |
6936 | return BT; |
6937 | return nullptr; |
6938 | } |
6939 | |
6940 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { |
6941 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ? static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 6941, __PRETTY_FUNCTION__)); |
6942 | return isSpecificBuiltinType(K); |
6943 | } |
6944 | |
6945 | inline bool Type::isNonOverloadPlaceholderType() const { |
6946 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6947 | return BT->isNonOverloadPlaceholderType(); |
6948 | return false; |
6949 | } |
6950 | |
6951 | inline bool Type::isVoidType() const { |
6952 | return isSpecificBuiltinType(BuiltinType::Void); |
6953 | } |
6954 | |
6955 | inline bool Type::isHalfType() const { |
6956 | // FIXME: Should we allow complex __fp16? Probably not. |
6957 | return isSpecificBuiltinType(BuiltinType::Half); |
6958 | } |
6959 | |
6960 | inline bool Type::isFloat16Type() const { |
6961 | return isSpecificBuiltinType(BuiltinType::Float16); |
6962 | } |
6963 | |
6964 | inline bool Type::isBFloat16Type() const { |
6965 | return isSpecificBuiltinType(BuiltinType::BFloat16); |
6966 | } |
6967 | |
6968 | inline bool Type::isFloat128Type() const { |
6969 | return isSpecificBuiltinType(BuiltinType::Float128); |
6970 | } |
6971 | |
6972 | inline bool Type::isNullPtrType() const { |
6973 | return isSpecificBuiltinType(BuiltinType::NullPtr); |
6974 | } |
6975 | |
6976 | bool IsEnumDeclComplete(EnumDecl *); |
6977 | bool IsEnumDeclScoped(EnumDecl *); |
6978 | |
6979 | inline bool Type::isIntegerType() const { |
6980 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6981 | return BT->getKind() >= BuiltinType::Bool && |
6982 | BT->getKind() <= BuiltinType::Int128; |
6983 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { |
6984 | // Incomplete enum types are not treated as integer types. |
6985 | // FIXME: In C++, enum types are never integer types. |
6986 | return IsEnumDeclComplete(ET->getDecl()) && |
6987 | !IsEnumDeclScoped(ET->getDecl()); |
6988 | } |
6989 | return isExtIntType(); |
6990 | } |
6991 | |
6992 | inline bool Type::isFixedPointType() const { |
6993 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
6994 | return BT->getKind() >= BuiltinType::ShortAccum && |
6995 | BT->getKind() <= BuiltinType::SatULongFract; |
6996 | } |
6997 | return false; |
6998 | } |
6999 | |
7000 | inline bool Type::isFixedPointOrIntegerType() const { |
7001 | return isFixedPointType() || isIntegerType(); |
7002 | } |
7003 | |
7004 | inline bool Type::isSaturatedFixedPointType() const { |
7005 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7006 | return BT->getKind() >= BuiltinType::SatShortAccum && |
7007 | BT->getKind() <= BuiltinType::SatULongFract; |
7008 | } |
7009 | return false; |
7010 | } |
7011 | |
7012 | inline bool Type::isUnsaturatedFixedPointType() const { |
7013 | return isFixedPointType() && !isSaturatedFixedPointType(); |
7014 | } |
7015 | |
7016 | inline bool Type::isSignedFixedPointType() const { |
7017 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7018 | return ((BT->getKind() >= BuiltinType::ShortAccum && |
7019 | BT->getKind() <= BuiltinType::LongAccum) || |
7020 | (BT->getKind() >= BuiltinType::ShortFract && |
7021 | BT->getKind() <= BuiltinType::LongFract) || |
7022 | (BT->getKind() >= BuiltinType::SatShortAccum && |
7023 | BT->getKind() <= BuiltinType::SatLongAccum) || |
7024 | (BT->getKind() >= BuiltinType::SatShortFract && |
7025 | BT->getKind() <= BuiltinType::SatLongFract)); |
7026 | } |
7027 | return false; |
7028 | } |
7029 | |
7030 | inline bool Type::isUnsignedFixedPointType() const { |
7031 | return isFixedPointType() && !isSignedFixedPointType(); |
7032 | } |
7033 | |
7034 | inline bool Type::isScalarType() const { |
7035 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7036 | return BT->getKind() > BuiltinType::Void && |
7037 | BT->getKind() <= BuiltinType::NullPtr; |
7038 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) |
7039 | // Enums are scalar types, but only if they are defined. Incomplete enums |
7040 | // are not treated as scalar types. |
7041 | return IsEnumDeclComplete(ET->getDecl()); |
7042 | return isa<PointerType>(CanonicalType) || |
7043 | isa<BlockPointerType>(CanonicalType) || |
7044 | isa<MemberPointerType>(CanonicalType) || |
7045 | isa<ComplexType>(CanonicalType) || |
7046 | isa<ObjCObjectPointerType>(CanonicalType) || |
7047 | isExtIntType(); |
7048 | } |
7049 | |
7050 | inline bool Type::isIntegralOrEnumerationType() const { |
7051 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7052 | return BT->getKind() >= BuiltinType::Bool && |
7053 | BT->getKind() <= BuiltinType::Int128; |
7054 | |
7055 | // Check for a complete enum type; incomplete enum types are not properly an |
7056 | // enumeration type in the sense required here. |
7057 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) |
7058 | return IsEnumDeclComplete(ET->getDecl()); |
7059 | |
7060 | return isExtIntType(); |
7061 | } |
7062 | |
7063 | inline bool Type::isBooleanType() const { |
7064 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7065 | return BT->getKind() == BuiltinType::Bool; |
7066 | return false; |
7067 | } |
7068 | |
7069 | inline bool Type::isUndeducedType() const { |
7070 | auto *DT = getContainedDeducedType(); |
7071 | return DT && !DT->isDeduced(); |
7072 | } |
7073 | |
7074 | /// Determines whether this is a type for which one can define |
7075 | /// an overloaded operator. |
7076 | inline bool Type::isOverloadableType() const { |
7077 | return isDependentType() || isRecordType() || isEnumeralType(); |
7078 | } |
7079 | |
7080 | /// Determines whether this type is written as a typedef-name. |
7081 | inline bool Type::isTypedefNameType() const { |
7082 | if (getAs<TypedefType>()) |
7083 | return true; |
7084 | if (auto *TST = getAs<TemplateSpecializationType>()) |
7085 | return TST->isTypeAlias(); |
7086 | return false; |
7087 | } |
7088 | |
7089 | /// Determines whether this type can decay to a pointer type. |
7090 | inline bool Type::canDecayToPointerType() const { |
7091 | return isFunctionType() || isArrayType(); |
7092 | } |
7093 | |
7094 | inline bool Type::hasPointerRepresentation() const { |
7095 | return (isPointerType() || isReferenceType() || isBlockPointerType() || |
7096 | isObjCObjectPointerType() || isNullPtrType()); |
7097 | } |
7098 | |
7099 | inline bool Type::hasObjCPointerRepresentation() const { |
7100 | return isObjCObjectPointerType(); |
7101 | } |
7102 | |
7103 | inline const Type *Type::getBaseElementTypeUnsafe() const { |
7104 | const Type *type = this; |
7105 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) |
7106 | type = arrayType->getElementType().getTypePtr(); |
7107 | return type; |
7108 | } |
7109 | |
7110 | inline const Type *Type::getPointeeOrArrayElementType() const { |
7111 | const Type *type = this; |
7112 | if (type->isAnyPointerType()) |
7113 | return type->getPointeeType().getTypePtr(); |
7114 | else if (type->isArrayType()) |
7115 | return type->getBaseElementTypeUnsafe(); |
7116 | return type; |
7117 | } |
7118 | /// Insertion operator for partial diagnostics. This allows sending adress |
7119 | /// spaces into a diagnostic with <<. |
7120 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7121 | LangAS AS) { |
7122 | PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), |
7123 | DiagnosticsEngine::ArgumentKind::ak_addrspace); |
7124 | return PD; |
7125 | } |
7126 | |
7127 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers |
7128 | /// into a diagnostic with <<. |
7129 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7130 | Qualifiers Q) { |
7131 | PD.AddTaggedVal(Q.getAsOpaqueValue(), |
7132 | DiagnosticsEngine::ArgumentKind::ak_qual); |
7133 | return PD; |
7134 | } |
7135 | |
7136 | /// Insertion operator for partial diagnostics. This allows sending QualType's |
7137 | /// into a diagnostic with <<. |
7138 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7139 | QualType T) { |
7140 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
7141 | DiagnosticsEngine::ak_qualtype); |
7142 | return PD; |
7143 | } |
7144 | |
7145 | // Helper class template that is used by Type::getAs to ensure that one does |
7146 | // not try to look through a qualified type to get to an array type. |
7147 | template <typename T> |
7148 | using TypeIsArrayType = |
7149 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || |
7150 | std::is_base_of<ArrayType, T>::value>; |
7151 | |
7152 | // Member-template getAs<specific type>'. |
7153 | template <typename T> const T *Type::getAs() const { |
7154 | static_assert(!TypeIsArrayType<T>::value, |
7155 | "ArrayType cannot be used with getAs!"); |
7156 | |
7157 | // If this is directly a T type, return it. |
7158 | if (const auto *Ty = dyn_cast<T>(this)) |
7159 | return Ty; |
7160 | |
7161 | // If the canonical form of this type isn't the right kind, reject it. |
7162 | if (!isa<T>(CanonicalType)) |
7163 | return nullptr; |
7164 | |
7165 | // If this is a typedef for the type, strip the typedef off without |
7166 | // losing all typedef information. |
7167 | return cast<T>(getUnqualifiedDesugaredType()); |
7168 | } |
7169 | |
7170 | template <typename T> const T *Type::getAsAdjusted() const { |
7171 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); |
7172 | |
7173 | // If this is directly a T type, return it. |
7174 | if (const auto *Ty = dyn_cast<T>(this)) |
7175 | return Ty; |
7176 | |
7177 | // If the canonical form of this type isn't the right kind, reject it. |
7178 | if (!isa<T>(CanonicalType)) |
7179 | return nullptr; |
7180 | |
7181 | // Strip off type adjustments that do not modify the underlying nature of the |
7182 | // type. |
7183 | const Type *Ty = this; |
7184 | while (Ty) { |
7185 | if (const auto *A = dyn_cast<AttributedType>(Ty)) |
7186 | Ty = A->getModifiedType().getTypePtr(); |
7187 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) |
7188 | Ty = E->desugar().getTypePtr(); |
7189 | else if (const auto *P = dyn_cast<ParenType>(Ty)) |
7190 | Ty = P->desugar().getTypePtr(); |
7191 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) |
7192 | Ty = A->desugar().getTypePtr(); |
7193 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) |
7194 | Ty = M->desugar().getTypePtr(); |
7195 | else |
7196 | break; |
7197 | } |
7198 | |
7199 | // Just because the canonical type is correct does not mean we can use cast<>, |
7200 | // since we may not have stripped off all the sugar down to the base type. |
7201 | return dyn_cast<T>(Ty); |
7202 | } |
7203 | |
7204 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { |
7205 | // If this is directly an array type, return it. |
7206 | if (const auto *arr = dyn_cast<ArrayType>(this)) |
7207 | return arr; |
7208 | |
7209 | // If the canonical form of this type isn't the right kind, reject it. |
7210 | if (!isa<ArrayType>(CanonicalType)) |
7211 | return nullptr; |
7212 | |
7213 | // If this is a typedef for the type, strip the typedef off without |
7214 | // losing all typedef information. |
7215 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7216 | } |
7217 | |
7218 | template <typename T> const T *Type::castAs() const { |
7219 | static_assert(!TypeIsArrayType<T>::value, |
7220 | "ArrayType cannot be used with castAs!"); |
7221 | |
7222 | if (const auto *ty = dyn_cast<T>(this)) return ty; |
7223 | assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 7223, __PRETTY_FUNCTION__)); |
7224 | return cast<T>(getUnqualifiedDesugaredType()); |
7225 | } |
7226 | |
7227 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { |
7228 | assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 7228, __PRETTY_FUNCTION__)); |
7229 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; |
7230 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7231 | } |
7232 | |
7233 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, |
7234 | QualType CanonicalPtr) |
7235 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { |
7236 | #ifndef NDEBUG |
7237 | QualType Adjusted = getAdjustedType(); |
7238 | (void)AttributedType::stripOuterNullability(Adjusted); |
7239 | assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void> (0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h" , 7239, __PRETTY_FUNCTION__)); |
7240 | #endif |
7241 | } |
7242 | |
7243 | QualType DecayedType::getPointeeType() const { |
7244 | QualType Decayed = getDecayedType(); |
7245 | (void)AttributedType::stripOuterNullability(Decayed); |
7246 | return cast<PointerType>(Decayed)->getPointeeType(); |
7247 | } |
7248 | |
7249 | // Get the decimal string representation of a fixed point type, represented |
7250 | // as a scaled integer. |
7251 | // TODO: At some point, we should change the arguments to instead just accept an |
7252 | // APFixedPoint instead of APSInt and scale. |
7253 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, |
7254 | unsigned Scale); |
7255 | |
7256 | } // namespace clang |
7257 | |
7258 | #endif // LLVM_CLANG_AST_TYPE_H |
1 | //===- llvm/ADT/PointerIntPair.h - Pair for pointer and int -----*- 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 PointerIntPair class. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_ADT_POINTERINTPAIR_H |
14 | #define LLVM_ADT_POINTERINTPAIR_H |
15 | |
16 | #include "llvm/Support/Compiler.h" |
17 | #include "llvm/Support/PointerLikeTypeTraits.h" |
18 | #include "llvm/Support/type_traits.h" |
19 | #include <cassert> |
20 | #include <cstdint> |
21 | #include <limits> |
22 | |
23 | namespace llvm { |
24 | |
25 | template <typename T> struct DenseMapInfo; |
26 | template <typename PointerT, unsigned IntBits, typename PtrTraits> |
27 | struct PointerIntPairInfo; |
28 | |
29 | /// PointerIntPair - This class implements a pair of a pointer and small |
30 | /// integer. It is designed to represent this in the space required by one |
31 | /// pointer by bitmangling the integer into the low part of the pointer. This |
32 | /// can only be done for small integers: typically up to 3 bits, but it depends |
33 | /// on the number of bits available according to PointerLikeTypeTraits for the |
34 | /// type. |
35 | /// |
36 | /// Note that PointerIntPair always puts the IntVal part in the highest bits |
37 | /// possible. For example, PointerIntPair<void*, 1, bool> will put the bit for |
38 | /// the bool into bit #2, not bit #0, which allows the low two bits to be used |
39 | /// for something else. For example, this allows: |
40 | /// PointerIntPair<PointerIntPair<void*, 1, bool>, 1, bool> |
41 | /// ... and the two bools will land in different bits. |
42 | template <typename PointerTy, unsigned IntBits, typename IntType = unsigned, |
43 | typename PtrTraits = PointerLikeTypeTraits<PointerTy>, |
44 | typename Info = PointerIntPairInfo<PointerTy, IntBits, PtrTraits>> |
45 | class PointerIntPair { |
46 | // Used by MSVC visualizer and generally helpful for debugging/visualizing. |
47 | using InfoTy = Info; |
48 | intptr_t Value = 0; |
49 | |
50 | public: |
51 | constexpr PointerIntPair() = default; |
52 | |
53 | PointerIntPair(PointerTy PtrVal, IntType IntVal) { |
54 | setPointerAndInt(PtrVal, IntVal); |
55 | } |
56 | |
57 | explicit PointerIntPair(PointerTy PtrVal) { initWithPointer(PtrVal); } |
58 | |
59 | PointerTy getPointer() const { return Info::getPointer(Value); } |
60 | |
61 | IntType getInt() const { return (IntType)Info::getInt(Value); } |
62 | |
63 | void setPointer(PointerTy PtrVal) LLVM_LVALUE_FUNCTION& { |
64 | Value = Info::updatePointer(Value, PtrVal); |
65 | } |
66 | |
67 | void setInt(IntType IntVal) LLVM_LVALUE_FUNCTION& { |
68 | Value = Info::updateInt(Value, static_cast<intptr_t>(IntVal)); |
69 | } |
70 | |
71 | void initWithPointer(PointerTy PtrVal) LLVM_LVALUE_FUNCTION& { |
72 | Value = Info::updatePointer(0, PtrVal); |
73 | } |
74 | |
75 | void setPointerAndInt(PointerTy PtrVal, IntType IntVal) LLVM_LVALUE_FUNCTION& { |
76 | Value = Info::updateInt(Info::updatePointer(0, PtrVal), |
77 | static_cast<intptr_t>(IntVal)); |
78 | } |
79 | |
80 | PointerTy const *getAddrOfPointer() const { |
81 | return const_cast<PointerIntPair *>(this)->getAddrOfPointer(); |
82 | } |
83 | |
84 | PointerTy *getAddrOfPointer() { |
85 | assert(Value == reinterpret_cast<intptr_t>(getPointer()) &&((Value == reinterpret_cast<intptr_t>(getPointer()) && "Can only return the address if IntBits is cleared and " "PtrTraits doesn't change the pointer" ) ? static_cast<void> (0) : __assert_fail ("Value == reinterpret_cast<intptr_t>(getPointer()) && \"Can only return the address if IntBits is cleared and \" \"PtrTraits doesn't change the pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 87, __PRETTY_FUNCTION__)) |
86 | "Can only return the address if IntBits is cleared and "((Value == reinterpret_cast<intptr_t>(getPointer()) && "Can only return the address if IntBits is cleared and " "PtrTraits doesn't change the pointer" ) ? static_cast<void> (0) : __assert_fail ("Value == reinterpret_cast<intptr_t>(getPointer()) && \"Can only return the address if IntBits is cleared and \" \"PtrTraits doesn't change the pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 87, __PRETTY_FUNCTION__)) |
87 | "PtrTraits doesn't change the pointer")((Value == reinterpret_cast<intptr_t>(getPointer()) && "Can only return the address if IntBits is cleared and " "PtrTraits doesn't change the pointer" ) ? static_cast<void> (0) : __assert_fail ("Value == reinterpret_cast<intptr_t>(getPointer()) && \"Can only return the address if IntBits is cleared and \" \"PtrTraits doesn't change the pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 87, __PRETTY_FUNCTION__)); |
88 | return reinterpret_cast<PointerTy *>(&Value); |
89 | } |
90 | |
91 | void *getOpaqueValue() const { return reinterpret_cast<void *>(Value); } |
92 | |
93 | void setFromOpaqueValue(void *Val) LLVM_LVALUE_FUNCTION& { |
94 | Value = reinterpret_cast<intptr_t>(Val); |
95 | } |
96 | |
97 | static PointerIntPair getFromOpaqueValue(void *V) { |
98 | PointerIntPair P; |
99 | P.setFromOpaqueValue(V); |
100 | return P; |
101 | } |
102 | |
103 | // Allow PointerIntPairs to be created from const void * if and only if the |
104 | // pointer type could be created from a const void *. |
105 | static PointerIntPair getFromOpaqueValue(const void *V) { |
106 | (void)PtrTraits::getFromVoidPointer(V); |
107 | return getFromOpaqueValue(const_cast<void *>(V)); |
108 | } |
109 | |
110 | bool operator==(const PointerIntPair &RHS) const { |
111 | return Value == RHS.Value; |
112 | } |
113 | |
114 | bool operator!=(const PointerIntPair &RHS) const { |
115 | return Value != RHS.Value; |
116 | } |
117 | |
118 | bool operator<(const PointerIntPair &RHS) const { return Value < RHS.Value; } |
119 | bool operator>(const PointerIntPair &RHS) const { return Value > RHS.Value; } |
120 | |
121 | bool operator<=(const PointerIntPair &RHS) const { |
122 | return Value <= RHS.Value; |
123 | } |
124 | |
125 | bool operator>=(const PointerIntPair &RHS) const { |
126 | return Value >= RHS.Value; |
127 | } |
128 | }; |
129 | |
130 | // Specialize is_trivially_copyable to avoid limitation of llvm::is_trivially_copyable |
131 | // when compiled with gcc 4.9. |
132 | template <typename PointerTy, unsigned IntBits, typename IntType, |
133 | typename PtrTraits, |
134 | typename Info> |
135 | struct is_trivially_copyable<PointerIntPair<PointerTy, IntBits, IntType, PtrTraits, Info>> : std::true_type { |
136 | #ifdef HAVE_STD_IS_TRIVIALLY_COPYABLE |
137 | static_assert(std::is_trivially_copyable<PointerIntPair<PointerTy, IntBits, IntType, PtrTraits, Info>>::value, |
138 | "inconsistent behavior between llvm:: and std:: implementation of is_trivially_copyable"); |
139 | #endif |
140 | }; |
141 | |
142 | |
143 | template <typename PointerT, unsigned IntBits, typename PtrTraits> |
144 | struct PointerIntPairInfo { |
145 | static_assert(PtrTraits::NumLowBitsAvailable < |
146 | std::numeric_limits<uintptr_t>::digits, |
147 | "cannot use a pointer type that has all bits free"); |
148 | static_assert(IntBits <= PtrTraits::NumLowBitsAvailable, |
149 | "PointerIntPair with integer size too large for pointer"); |
150 | enum MaskAndShiftConstants : uintptr_t { |
151 | /// PointerBitMask - The bits that come from the pointer. |
152 | PointerBitMask = |
153 | ~(uintptr_t)(((intptr_t)1 << PtrTraits::NumLowBitsAvailable) - 1), |
154 | |
155 | /// IntShift - The number of low bits that we reserve for other uses, and |
156 | /// keep zero. |
157 | IntShift = (uintptr_t)PtrTraits::NumLowBitsAvailable - IntBits, |
158 | |
159 | /// IntMask - This is the unshifted mask for valid bits of the int type. |
160 | IntMask = (uintptr_t)(((intptr_t)1 << IntBits) - 1), |
161 | |
162 | // ShiftedIntMask - This is the bits for the integer shifted in place. |
163 | ShiftedIntMask = (uintptr_t)(IntMask << IntShift) |
164 | }; |
165 | |
166 | static PointerT getPointer(intptr_t Value) { |
167 | return PtrTraits::getFromVoidPointer( |
168 | reinterpret_cast<void *>(Value & PointerBitMask)); |
169 | } |
170 | |
171 | static intptr_t getInt(intptr_t Value) { |
172 | return (Value >> IntShift) & IntMask; |
173 | } |
174 | |
175 | static intptr_t updatePointer(intptr_t OrigValue, PointerT Ptr) { |
176 | intptr_t PtrWord = |
177 | reinterpret_cast<intptr_t>(PtrTraits::getAsVoidPointer(Ptr)); |
178 | assert((PtrWord & ~PointerBitMask) == 0 &&(((PtrWord & ~PointerBitMask) == 0 && "Pointer is not sufficiently aligned" ) ? static_cast<void> (0) : __assert_fail ("(PtrWord & ~PointerBitMask) == 0 && \"Pointer is not sufficiently aligned\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 179, __PRETTY_FUNCTION__)) |
179 | "Pointer is not sufficiently aligned")(((PtrWord & ~PointerBitMask) == 0 && "Pointer is not sufficiently aligned" ) ? static_cast<void> (0) : __assert_fail ("(PtrWord & ~PointerBitMask) == 0 && \"Pointer is not sufficiently aligned\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 179, __PRETTY_FUNCTION__)); |
180 | // Preserve all low bits, just update the pointer. |
181 | return PtrWord | (OrigValue & ~PointerBitMask); |
182 | } |
183 | |
184 | static intptr_t updateInt(intptr_t OrigValue, intptr_t Int) { |
185 | intptr_t IntWord = static_cast<intptr_t>(Int); |
186 | assert((IntWord & ~IntMask) == 0 && "Integer too large for field")(((IntWord & ~IntMask) == 0 && "Integer too large for field" ) ? static_cast<void> (0) : __assert_fail ("(IntWord & ~IntMask) == 0 && \"Integer too large for field\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include/llvm/ADT/PointerIntPair.h" , 186, __PRETTY_FUNCTION__)); |
187 | |
188 | // Preserve all bits other than the ones we are updating. |
189 | return (OrigValue & ~ShiftedIntMask) | IntWord << IntShift; |
190 | } |
191 | }; |
192 | |
193 | // Provide specialization of DenseMapInfo for PointerIntPair. |
194 | template <typename PointerTy, unsigned IntBits, typename IntType> |
195 | struct DenseMapInfo<PointerIntPair<PointerTy, IntBits, IntType>> { |
196 | using Ty = PointerIntPair<PointerTy, IntBits, IntType>; |
197 | |
198 | static Ty getEmptyKey() { |
199 | uintptr_t Val = static_cast<uintptr_t>(-1); |
200 | Val <<= PointerLikeTypeTraits<Ty>::NumLowBitsAvailable; |
201 | return Ty::getFromOpaqueValue(reinterpret_cast<void *>(Val)); |
202 | } |
203 | |
204 | static Ty getTombstoneKey() { |
205 | uintptr_t Val = static_cast<uintptr_t>(-2); |
206 | Val <<= PointerLikeTypeTraits<PointerTy>::NumLowBitsAvailable; |
207 | return Ty::getFromOpaqueValue(reinterpret_cast<void *>(Val)); |
208 | } |
209 | |
210 | static unsigned getHashValue(Ty V) { |
211 | uintptr_t IV = reinterpret_cast<uintptr_t>(V.getOpaqueValue()); |
212 | return unsigned(IV) ^ unsigned(IV >> 9); |
213 | } |
214 | |
215 | static bool isEqual(const Ty &LHS, const Ty &RHS) { return LHS == RHS; } |
216 | }; |
217 | |
218 | // Teach SmallPtrSet that PointerIntPair is "basically a pointer". |
219 | template <typename PointerTy, unsigned IntBits, typename IntType, |
220 | typename PtrTraits> |
221 | struct PointerLikeTypeTraits< |
222 | PointerIntPair<PointerTy, IntBits, IntType, PtrTraits>> { |
223 | static inline void * |
224 | getAsVoidPointer(const PointerIntPair<PointerTy, IntBits, IntType> &P) { |
225 | return P.getOpaqueValue(); |
226 | } |
227 | |
228 | static inline PointerIntPair<PointerTy, IntBits, IntType> |
229 | getFromVoidPointer(void *P) { |
230 | return PointerIntPair<PointerTy, IntBits, IntType>::getFromOpaqueValue(P); |
231 | } |
232 | |
233 | static inline PointerIntPair<PointerTy, IntBits, IntType> |
234 | getFromVoidPointer(const void *P) { |
235 | return PointerIntPair<PointerTy, IntBits, IntType>::getFromOpaqueValue(P); |
236 | } |
237 | |
238 | static constexpr int NumLowBitsAvailable = |
239 | PtrTraits::NumLowBitsAvailable - IntBits; |
240 | }; |
241 | |
242 | } // end namespace llvm |
243 | |
244 | #endif // LLVM_ADT_POINTERINTPAIR_H |