File: | build/source/clang/lib/Sema/SemaLambda.cpp |
Warning: | line 1293, column 26 1st function call argument is an uninitialized value |
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1 | //===--- SemaLambda.cpp - Semantic Analysis for C++11 Lambdas -------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file implements semantic analysis for C++ lambda expressions. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | #include "clang/Sema/DeclSpec.h" | |||
13 | #include "TypeLocBuilder.h" | |||
14 | #include "clang/AST/ASTLambda.h" | |||
15 | #include "clang/AST/ExprCXX.h" | |||
16 | #include "clang/Basic/TargetInfo.h" | |||
17 | #include "clang/Sema/Initialization.h" | |||
18 | #include "clang/Sema/Lookup.h" | |||
19 | #include "clang/Sema/Scope.h" | |||
20 | #include "clang/Sema/ScopeInfo.h" | |||
21 | #include "clang/Sema/SemaInternal.h" | |||
22 | #include "clang/Sema/SemaLambda.h" | |||
23 | #include "llvm/ADT/STLExtras.h" | |||
24 | #include <optional> | |||
25 | using namespace clang; | |||
26 | using namespace sema; | |||
27 | ||||
28 | /// Examines the FunctionScopeInfo stack to determine the nearest | |||
29 | /// enclosing lambda (to the current lambda) that is 'capture-ready' for | |||
30 | /// the variable referenced in the current lambda (i.e. \p VarToCapture). | |||
31 | /// If successful, returns the index into Sema's FunctionScopeInfo stack | |||
32 | /// of the capture-ready lambda's LambdaScopeInfo. | |||
33 | /// | |||
34 | /// Climbs down the stack of lambdas (deepest nested lambda - i.e. current | |||
35 | /// lambda - is on top) to determine the index of the nearest enclosing/outer | |||
36 | /// lambda that is ready to capture the \p VarToCapture being referenced in | |||
37 | /// the current lambda. | |||
38 | /// As we climb down the stack, we want the index of the first such lambda - | |||
39 | /// that is the lambda with the highest index that is 'capture-ready'. | |||
40 | /// | |||
41 | /// A lambda 'L' is capture-ready for 'V' (var or this) if: | |||
42 | /// - its enclosing context is non-dependent | |||
43 | /// - and if the chain of lambdas between L and the lambda in which | |||
44 | /// V is potentially used (i.e. the lambda at the top of the scope info | |||
45 | /// stack), can all capture or have already captured V. | |||
46 | /// If \p VarToCapture is 'null' then we are trying to capture 'this'. | |||
47 | /// | |||
48 | /// Note that a lambda that is deemed 'capture-ready' still needs to be checked | |||
49 | /// for whether it is 'capture-capable' (see | |||
50 | /// getStackIndexOfNearestEnclosingCaptureCapableLambda), before it can truly | |||
51 | /// capture. | |||
52 | /// | |||
53 | /// \param FunctionScopes - Sema's stack of nested FunctionScopeInfo's (which a | |||
54 | /// LambdaScopeInfo inherits from). The current/deepest/innermost lambda | |||
55 | /// is at the top of the stack and has the highest index. | |||
56 | /// \param VarToCapture - the variable to capture. If NULL, capture 'this'. | |||
57 | /// | |||
58 | /// \returns An std::optional<unsigned> Index that if evaluates to 'true' | |||
59 | /// contains the index (into Sema's FunctionScopeInfo stack) of the innermost | |||
60 | /// lambda which is capture-ready. If the return value evaluates to 'false' | |||
61 | /// then no lambda is capture-ready for \p VarToCapture. | |||
62 | ||||
63 | static inline std::optional<unsigned> | |||
64 | getStackIndexOfNearestEnclosingCaptureReadyLambda( | |||
65 | ArrayRef<const clang::sema::FunctionScopeInfo *> FunctionScopes, | |||
66 | ValueDecl *VarToCapture) { | |||
67 | // Label failure to capture. | |||
68 | const std::optional<unsigned> NoLambdaIsCaptureReady; | |||
69 | ||||
70 | // Ignore all inner captured regions. | |||
71 | unsigned CurScopeIndex = FunctionScopes.size() - 1; | |||
72 | while (CurScopeIndex > 0 && isa<clang::sema::CapturedRegionScopeInfo>( | |||
73 | FunctionScopes[CurScopeIndex])) | |||
74 | --CurScopeIndex; | |||
75 | assert((static_cast <bool> (isa<clang::sema::LambdaScopeInfo >(FunctionScopes[CurScopeIndex]) && "The function on the top of sema's function-info stack must be a lambda" ) ? void (0) : __assert_fail ("isa<clang::sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex]) && \"The function on the top of sema's function-info stack must be a lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 77, __extension__ __PRETTY_FUNCTION__ )) | |||
76 | isa<clang::sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex]) &&(static_cast <bool> (isa<clang::sema::LambdaScopeInfo >(FunctionScopes[CurScopeIndex]) && "The function on the top of sema's function-info stack must be a lambda" ) ? void (0) : __assert_fail ("isa<clang::sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex]) && \"The function on the top of sema's function-info stack must be a lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 77, __extension__ __PRETTY_FUNCTION__ )) | |||
77 | "The function on the top of sema's function-info stack must be a lambda")(static_cast <bool> (isa<clang::sema::LambdaScopeInfo >(FunctionScopes[CurScopeIndex]) && "The function on the top of sema's function-info stack must be a lambda" ) ? void (0) : __assert_fail ("isa<clang::sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex]) && \"The function on the top of sema's function-info stack must be a lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 77, __extension__ __PRETTY_FUNCTION__ )); | |||
78 | ||||
79 | // If VarToCapture is null, we are attempting to capture 'this'. | |||
80 | const bool IsCapturingThis = !VarToCapture; | |||
81 | const bool IsCapturingVariable = !IsCapturingThis; | |||
82 | ||||
83 | // Start with the current lambda at the top of the stack (highest index). | |||
84 | DeclContext *EnclosingDC = | |||
85 | cast<sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex])->CallOperator; | |||
86 | ||||
87 | do { | |||
88 | const clang::sema::LambdaScopeInfo *LSI = | |||
89 | cast<sema::LambdaScopeInfo>(FunctionScopes[CurScopeIndex]); | |||
90 | // IF we have climbed down to an intervening enclosing lambda that contains | |||
91 | // the variable declaration - it obviously can/must not capture the | |||
92 | // variable. | |||
93 | // Since its enclosing DC is dependent, all the lambdas between it and the | |||
94 | // innermost nested lambda are dependent (otherwise we wouldn't have | |||
95 | // arrived here) - so we don't yet have a lambda that can capture the | |||
96 | // variable. | |||
97 | if (IsCapturingVariable && | |||
98 | VarToCapture->getDeclContext()->Equals(EnclosingDC)) | |||
99 | return NoLambdaIsCaptureReady; | |||
100 | ||||
101 | // For an enclosing lambda to be capture ready for an entity, all | |||
102 | // intervening lambda's have to be able to capture that entity. If even | |||
103 | // one of the intervening lambda's is not capable of capturing the entity | |||
104 | // then no enclosing lambda can ever capture that entity. | |||
105 | // For e.g. | |||
106 | // const int x = 10; | |||
107 | // [=](auto a) { #1 | |||
108 | // [](auto b) { #2 <-- an intervening lambda that can never capture 'x' | |||
109 | // [=](auto c) { #3 | |||
110 | // f(x, c); <-- can not lead to x's speculative capture by #1 or #2 | |||
111 | // }; }; }; | |||
112 | // If they do not have a default implicit capture, check to see | |||
113 | // if the entity has already been explicitly captured. | |||
114 | // If even a single dependent enclosing lambda lacks the capability | |||
115 | // to ever capture this variable, there is no further enclosing | |||
116 | // non-dependent lambda that can capture this variable. | |||
117 | if (LSI->ImpCaptureStyle == sema::LambdaScopeInfo::ImpCap_None) { | |||
118 | if (IsCapturingVariable && !LSI->isCaptured(VarToCapture)) | |||
119 | return NoLambdaIsCaptureReady; | |||
120 | if (IsCapturingThis && !LSI->isCXXThisCaptured()) | |||
121 | return NoLambdaIsCaptureReady; | |||
122 | } | |||
123 | EnclosingDC = getLambdaAwareParentOfDeclContext(EnclosingDC); | |||
124 | ||||
125 | assert(CurScopeIndex)(static_cast <bool> (CurScopeIndex) ? void (0) : __assert_fail ("CurScopeIndex", "clang/lib/Sema/SemaLambda.cpp", 125, __extension__ __PRETTY_FUNCTION__)); | |||
126 | --CurScopeIndex; | |||
127 | } while (!EnclosingDC->isTranslationUnit() && | |||
128 | EnclosingDC->isDependentContext() && | |||
129 | isLambdaCallOperator(EnclosingDC)); | |||
130 | ||||
131 | assert(CurScopeIndex < (FunctionScopes.size() - 1))(static_cast <bool> (CurScopeIndex < (FunctionScopes .size() - 1)) ? void (0) : __assert_fail ("CurScopeIndex < (FunctionScopes.size() - 1)" , "clang/lib/Sema/SemaLambda.cpp", 131, __extension__ __PRETTY_FUNCTION__ )); | |||
132 | // If the enclosingDC is not dependent, then the immediately nested lambda | |||
133 | // (one index above) is capture-ready. | |||
134 | if (!EnclosingDC->isDependentContext()) | |||
135 | return CurScopeIndex + 1; | |||
136 | return NoLambdaIsCaptureReady; | |||
137 | } | |||
138 | ||||
139 | /// Examines the FunctionScopeInfo stack to determine the nearest | |||
140 | /// enclosing lambda (to the current lambda) that is 'capture-capable' for | |||
141 | /// the variable referenced in the current lambda (i.e. \p VarToCapture). | |||
142 | /// If successful, returns the index into Sema's FunctionScopeInfo stack | |||
143 | /// of the capture-capable lambda's LambdaScopeInfo. | |||
144 | /// | |||
145 | /// Given the current stack of lambdas being processed by Sema and | |||
146 | /// the variable of interest, to identify the nearest enclosing lambda (to the | |||
147 | /// current lambda at the top of the stack) that can truly capture | |||
148 | /// a variable, it has to have the following two properties: | |||
149 | /// a) 'capture-ready' - be the innermost lambda that is 'capture-ready': | |||
150 | /// - climb down the stack (i.e. starting from the innermost and examining | |||
151 | /// each outer lambda step by step) checking if each enclosing | |||
152 | /// lambda can either implicitly or explicitly capture the variable. | |||
153 | /// Record the first such lambda that is enclosed in a non-dependent | |||
154 | /// context. If no such lambda currently exists return failure. | |||
155 | /// b) 'capture-capable' - make sure the 'capture-ready' lambda can truly | |||
156 | /// capture the variable by checking all its enclosing lambdas: | |||
157 | /// - check if all outer lambdas enclosing the 'capture-ready' lambda | |||
158 | /// identified above in 'a' can also capture the variable (this is done | |||
159 | /// via tryCaptureVariable for variables and CheckCXXThisCapture for | |||
160 | /// 'this' by passing in the index of the Lambda identified in step 'a') | |||
161 | /// | |||
162 | /// \param FunctionScopes - Sema's stack of nested FunctionScopeInfo's (which a | |||
163 | /// LambdaScopeInfo inherits from). The current/deepest/innermost lambda | |||
164 | /// is at the top of the stack. | |||
165 | /// | |||
166 | /// \param VarToCapture - the variable to capture. If NULL, capture 'this'. | |||
167 | /// | |||
168 | /// | |||
169 | /// \returns An std::optional<unsigned> Index that if evaluates to 'true' | |||
170 | /// contains the index (into Sema's FunctionScopeInfo stack) of the innermost | |||
171 | /// lambda which is capture-capable. If the return value evaluates to 'false' | |||
172 | /// then no lambda is capture-capable for \p VarToCapture. | |||
173 | ||||
174 | std::optional<unsigned> | |||
175 | clang::getStackIndexOfNearestEnclosingCaptureCapableLambda( | |||
176 | ArrayRef<const sema::FunctionScopeInfo *> FunctionScopes, | |||
177 | ValueDecl *VarToCapture, Sema &S) { | |||
178 | ||||
179 | const std::optional<unsigned> NoLambdaIsCaptureCapable; | |||
180 | ||||
181 | const std::optional<unsigned> OptionalStackIndex = | |||
182 | getStackIndexOfNearestEnclosingCaptureReadyLambda(FunctionScopes, | |||
183 | VarToCapture); | |||
184 | if (!OptionalStackIndex) | |||
185 | return NoLambdaIsCaptureCapable; | |||
186 | ||||
187 | const unsigned IndexOfCaptureReadyLambda = *OptionalStackIndex; | |||
188 | assert(((IndexOfCaptureReadyLambda != (FunctionScopes.size() - 1)) ||(static_cast <bool> (((IndexOfCaptureReadyLambda != (FunctionScopes .size() - 1)) || S.getCurGenericLambda()) && "The capture ready lambda for a potential capture can only be the " "current lambda if it is a generic lambda") ? void (0) : __assert_fail ("((IndexOfCaptureReadyLambda != (FunctionScopes.size() - 1)) || S.getCurGenericLambda()) && \"The capture ready lambda for a potential capture can only be the \" \"current lambda if it is a generic lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 191, __extension__ __PRETTY_FUNCTION__ )) | |||
189 | S.getCurGenericLambda()) &&(static_cast <bool> (((IndexOfCaptureReadyLambda != (FunctionScopes .size() - 1)) || S.getCurGenericLambda()) && "The capture ready lambda for a potential capture can only be the " "current lambda if it is a generic lambda") ? void (0) : __assert_fail ("((IndexOfCaptureReadyLambda != (FunctionScopes.size() - 1)) || S.getCurGenericLambda()) && \"The capture ready lambda for a potential capture can only be the \" \"current lambda if it is a generic lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 191, __extension__ __PRETTY_FUNCTION__ )) | |||
190 | "The capture ready lambda for a potential capture can only be the "(static_cast <bool> (((IndexOfCaptureReadyLambda != (FunctionScopes .size() - 1)) || S.getCurGenericLambda()) && "The capture ready lambda for a potential capture can only be the " "current lambda if it is a generic lambda") ? void (0) : __assert_fail ("((IndexOfCaptureReadyLambda != (FunctionScopes.size() - 1)) || S.getCurGenericLambda()) && \"The capture ready lambda for a potential capture can only be the \" \"current lambda if it is a generic lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 191, __extension__ __PRETTY_FUNCTION__ )) | |||
191 | "current lambda if it is a generic lambda")(static_cast <bool> (((IndexOfCaptureReadyLambda != (FunctionScopes .size() - 1)) || S.getCurGenericLambda()) && "The capture ready lambda for a potential capture can only be the " "current lambda if it is a generic lambda") ? void (0) : __assert_fail ("((IndexOfCaptureReadyLambda != (FunctionScopes.size() - 1)) || S.getCurGenericLambda()) && \"The capture ready lambda for a potential capture can only be the \" \"current lambda if it is a generic lambda\"" , "clang/lib/Sema/SemaLambda.cpp", 191, __extension__ __PRETTY_FUNCTION__ )); | |||
192 | ||||
193 | const sema::LambdaScopeInfo *const CaptureReadyLambdaLSI = | |||
194 | cast<sema::LambdaScopeInfo>(FunctionScopes[IndexOfCaptureReadyLambda]); | |||
195 | ||||
196 | // If VarToCapture is null, we are attempting to capture 'this' | |||
197 | const bool IsCapturingThis = !VarToCapture; | |||
198 | const bool IsCapturingVariable = !IsCapturingThis; | |||
199 | ||||
200 | if (IsCapturingVariable) { | |||
201 | // Check if the capture-ready lambda can truly capture the variable, by | |||
202 | // checking whether all enclosing lambdas of the capture-ready lambda allow | |||
203 | // the capture - i.e. make sure it is capture-capable. | |||
204 | QualType CaptureType, DeclRefType; | |||
205 | const bool CanCaptureVariable = | |||
206 | !S.tryCaptureVariable(VarToCapture, | |||
207 | /*ExprVarIsUsedInLoc*/ SourceLocation(), | |||
208 | clang::Sema::TryCapture_Implicit, | |||
209 | /*EllipsisLoc*/ SourceLocation(), | |||
210 | /*BuildAndDiagnose*/ false, CaptureType, | |||
211 | DeclRefType, &IndexOfCaptureReadyLambda); | |||
212 | if (!CanCaptureVariable) | |||
213 | return NoLambdaIsCaptureCapable; | |||
214 | } else { | |||
215 | // Check if the capture-ready lambda can truly capture 'this' by checking | |||
216 | // whether all enclosing lambdas of the capture-ready lambda can capture | |||
217 | // 'this'. | |||
218 | const bool CanCaptureThis = | |||
219 | !S.CheckCXXThisCapture( | |||
220 | CaptureReadyLambdaLSI->PotentialThisCaptureLocation, | |||
221 | /*Explicit*/ false, /*BuildAndDiagnose*/ false, | |||
222 | &IndexOfCaptureReadyLambda); | |||
223 | if (!CanCaptureThis) | |||
224 | return NoLambdaIsCaptureCapable; | |||
225 | } | |||
226 | return IndexOfCaptureReadyLambda; | |||
227 | } | |||
228 | ||||
229 | static inline TemplateParameterList * | |||
230 | getGenericLambdaTemplateParameterList(LambdaScopeInfo *LSI, Sema &SemaRef) { | |||
231 | if (!LSI->GLTemplateParameterList && !LSI->TemplateParams.empty()) { | |||
232 | LSI->GLTemplateParameterList = TemplateParameterList::Create( | |||
233 | SemaRef.Context, | |||
234 | /*Template kw loc*/ SourceLocation(), | |||
235 | /*L angle loc*/ LSI->ExplicitTemplateParamsRange.getBegin(), | |||
236 | LSI->TemplateParams, | |||
237 | /*R angle loc*/LSI->ExplicitTemplateParamsRange.getEnd(), | |||
238 | LSI->RequiresClause.get()); | |||
239 | } | |||
240 | return LSI->GLTemplateParameterList; | |||
241 | } | |||
242 | ||||
243 | CXXRecordDecl * | |||
244 | Sema::createLambdaClosureType(SourceRange IntroducerRange, TypeSourceInfo *Info, | |||
245 | unsigned LambdaDependencyKind, | |||
246 | LambdaCaptureDefault CaptureDefault) { | |||
247 | DeclContext *DC = CurContext; | |||
248 | while (!(DC->isFunctionOrMethod() || DC->isRecord() || DC->isFileContext())) | |||
249 | DC = DC->getParent(); | |||
250 | ||||
251 | bool IsGenericLambda = | |||
252 | Info && getGenericLambdaTemplateParameterList(getCurLambda(), *this); | |||
253 | // Start constructing the lambda class. | |||
254 | CXXRecordDecl *Class = CXXRecordDecl::CreateLambda( | |||
255 | Context, DC, Info, IntroducerRange.getBegin(), LambdaDependencyKind, | |||
256 | IsGenericLambda, CaptureDefault); | |||
257 | DC->addDecl(Class); | |||
258 | ||||
259 | return Class; | |||
260 | } | |||
261 | ||||
262 | /// Determine whether the given context is or is enclosed in an inline | |||
263 | /// function. | |||
264 | static bool isInInlineFunction(const DeclContext *DC) { | |||
265 | while (!DC->isFileContext()) { | |||
266 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) | |||
267 | if (FD->isInlined()) | |||
268 | return true; | |||
269 | ||||
270 | DC = DC->getLexicalParent(); | |||
271 | } | |||
272 | ||||
273 | return false; | |||
274 | } | |||
275 | ||||
276 | std::tuple<MangleNumberingContext *, Decl *> | |||
277 | Sema::getCurrentMangleNumberContext(const DeclContext *DC) { | |||
278 | // Compute the context for allocating mangling numbers in the current | |||
279 | // expression, if the ABI requires them. | |||
280 | Decl *ManglingContextDecl = ExprEvalContexts.back().ManglingContextDecl; | |||
281 | ||||
282 | enum ContextKind { | |||
283 | Normal, | |||
284 | DefaultArgument, | |||
285 | DataMember, | |||
286 | StaticDataMember, | |||
287 | InlineVariable, | |||
288 | VariableTemplate, | |||
289 | Concept | |||
290 | } Kind = Normal; | |||
291 | ||||
292 | // Default arguments of member function parameters that appear in a class | |||
293 | // definition, as well as the initializers of data members, receive special | |||
294 | // treatment. Identify them. | |||
295 | if (ManglingContextDecl) { | |||
296 | if (ParmVarDecl *Param = dyn_cast<ParmVarDecl>(ManglingContextDecl)) { | |||
297 | if (const DeclContext *LexicalDC | |||
298 | = Param->getDeclContext()->getLexicalParent()) | |||
299 | if (LexicalDC->isRecord()) | |||
300 | Kind = DefaultArgument; | |||
301 | } else if (VarDecl *Var = dyn_cast<VarDecl>(ManglingContextDecl)) { | |||
302 | if (Var->getDeclContext()->isRecord()) | |||
303 | Kind = StaticDataMember; | |||
304 | else if (Var->getMostRecentDecl()->isInline()) | |||
305 | Kind = InlineVariable; | |||
306 | else if (Var->getDescribedVarTemplate()) | |||
307 | Kind = VariableTemplate; | |||
308 | else if (auto *VTS = dyn_cast<VarTemplateSpecializationDecl>(Var)) { | |||
309 | if (!VTS->isExplicitSpecialization()) | |||
310 | Kind = VariableTemplate; | |||
311 | } | |||
312 | } else if (isa<FieldDecl>(ManglingContextDecl)) { | |||
313 | Kind = DataMember; | |||
314 | } else if (isa<ImplicitConceptSpecializationDecl>(ManglingContextDecl)) { | |||
315 | Kind = Concept; | |||
316 | } | |||
317 | } | |||
318 | ||||
319 | // Itanium ABI [5.1.7]: | |||
320 | // In the following contexts [...] the one-definition rule requires closure | |||
321 | // types in different translation units to "correspond": | |||
322 | bool IsInNonspecializedTemplate = | |||
323 | inTemplateInstantiation() || CurContext->isDependentContext(); | |||
324 | switch (Kind) { | |||
325 | case Normal: { | |||
326 | // -- the bodies of non-exported nonspecialized template functions | |||
327 | // -- the bodies of inline functions | |||
328 | if ((IsInNonspecializedTemplate && | |||
329 | !(ManglingContextDecl && isa<ParmVarDecl>(ManglingContextDecl))) || | |||
330 | isInInlineFunction(CurContext)) { | |||
331 | while (auto *CD = dyn_cast<CapturedDecl>(DC)) | |||
332 | DC = CD->getParent(); | |||
333 | return std::make_tuple(&Context.getManglingNumberContext(DC), nullptr); | |||
334 | } | |||
335 | ||||
336 | return std::make_tuple(nullptr, nullptr); | |||
337 | } | |||
338 | ||||
339 | case Concept: | |||
340 | // Concept definitions aren't code generated and thus aren't mangled, | |||
341 | // however the ManglingContextDecl is important for the purposes of | |||
342 | // re-forming the template argument list of the lambda for constraint | |||
343 | // evaluation. | |||
344 | case StaticDataMember: | |||
345 | // -- the initializers of nonspecialized static members of template classes | |||
346 | if (!IsInNonspecializedTemplate) | |||
347 | return std::make_tuple(nullptr, ManglingContextDecl); | |||
348 | // Fall through to get the current context. | |||
349 | [[fallthrough]]; | |||
350 | ||||
351 | case DataMember: | |||
352 | // -- the in-class initializers of class members | |||
353 | case DefaultArgument: | |||
354 | // -- default arguments appearing in class definitions | |||
355 | case InlineVariable: | |||
356 | // -- the initializers of inline variables | |||
357 | case VariableTemplate: | |||
358 | // -- the initializers of templated variables | |||
359 | return std::make_tuple( | |||
360 | &Context.getManglingNumberContext(ASTContext::NeedExtraManglingDecl, | |||
361 | ManglingContextDecl), | |||
362 | ManglingContextDecl); | |||
363 | } | |||
364 | ||||
365 | llvm_unreachable("unexpected context")::llvm::llvm_unreachable_internal("unexpected context", "clang/lib/Sema/SemaLambda.cpp" , 365); | |||
366 | } | |||
367 | ||||
368 | static QualType | |||
369 | buildTypeForLambdaCallOperator(Sema &S, clang::CXXRecordDecl *Class, | |||
370 | TemplateParameterList *TemplateParams, | |||
371 | TypeSourceInfo *MethodTypeInfo) { | |||
372 | assert(MethodTypeInfo && "expected a non null type")(static_cast <bool> (MethodTypeInfo && "expected a non null type" ) ? void (0) : __assert_fail ("MethodTypeInfo && \"expected a non null type\"" , "clang/lib/Sema/SemaLambda.cpp", 372, __extension__ __PRETTY_FUNCTION__ )); | |||
373 | ||||
374 | QualType MethodType = MethodTypeInfo->getType(); | |||
375 | // If a lambda appears in a dependent context or is a generic lambda (has | |||
376 | // template parameters) and has an 'auto' return type, deduce it to a | |||
377 | // dependent type. | |||
378 | if (Class->isDependentContext() || TemplateParams) { | |||
379 | const FunctionProtoType *FPT = MethodType->castAs<FunctionProtoType>(); | |||
380 | QualType Result = FPT->getReturnType(); | |||
381 | if (Result->isUndeducedType()) { | |||
382 | Result = S.SubstAutoTypeDependent(Result); | |||
383 | MethodType = S.Context.getFunctionType(Result, FPT->getParamTypes(), | |||
384 | FPT->getExtProtoInfo()); | |||
385 | } | |||
386 | } | |||
387 | return MethodType; | |||
388 | } | |||
389 | ||||
390 | void Sema::handleLambdaNumbering( | |||
391 | CXXRecordDecl *Class, CXXMethodDecl *Method, | |||
392 | std::optional<std::tuple<bool, unsigned, unsigned, Decl *>> Mangling) { | |||
393 | if (Mangling) { | |||
394 | bool HasKnownInternalLinkage; | |||
395 | unsigned ManglingNumber, DeviceManglingNumber; | |||
396 | Decl *ManglingContextDecl; | |||
397 | std::tie(HasKnownInternalLinkage, ManglingNumber, DeviceManglingNumber, | |||
398 | ManglingContextDecl) = *Mangling; | |||
399 | Class->setLambdaMangling(ManglingNumber, ManglingContextDecl, | |||
400 | HasKnownInternalLinkage); | |||
401 | Class->setDeviceLambdaManglingNumber(DeviceManglingNumber); | |||
402 | return; | |||
403 | } | |||
404 | ||||
405 | auto getMangleNumberingContext = | |||
406 | [this](CXXRecordDecl *Class, | |||
407 | Decl *ManglingContextDecl) -> MangleNumberingContext * { | |||
408 | // Get mangle numbering context if there's any extra decl context. | |||
409 | if (ManglingContextDecl) | |||
410 | return &Context.getManglingNumberContext( | |||
411 | ASTContext::NeedExtraManglingDecl, ManglingContextDecl); | |||
412 | // Otherwise, from that lambda's decl context. | |||
413 | auto DC = Class->getDeclContext(); | |||
414 | while (auto *CD = dyn_cast<CapturedDecl>(DC)) | |||
415 | DC = CD->getParent(); | |||
416 | return &Context.getManglingNumberContext(DC); | |||
417 | }; | |||
418 | ||||
419 | MangleNumberingContext *MCtx; | |||
420 | Decl *ManglingContextDecl; | |||
421 | std::tie(MCtx, ManglingContextDecl) = | |||
422 | getCurrentMangleNumberContext(Class->getDeclContext()); | |||
423 | bool HasKnownInternalLinkage = false; | |||
424 | if (!MCtx && (getLangOpts().CUDA || getLangOpts().SYCLIsDevice || | |||
425 | getLangOpts().SYCLIsHost)) { | |||
426 | // Force lambda numbering in CUDA/HIP as we need to name lambdas following | |||
427 | // ODR. Both device- and host-compilation need to have a consistent naming | |||
428 | // on kernel functions. As lambdas are potential part of these `__global__` | |||
429 | // function names, they needs numbering following ODR. | |||
430 | // Also force for SYCL, since we need this for the | |||
431 | // __builtin_sycl_unique_stable_name implementation, which depends on lambda | |||
432 | // mangling. | |||
433 | MCtx = getMangleNumberingContext(Class, ManglingContextDecl); | |||
434 | assert(MCtx && "Retrieving mangle numbering context failed!")(static_cast <bool> (MCtx && "Retrieving mangle numbering context failed!" ) ? void (0) : __assert_fail ("MCtx && \"Retrieving mangle numbering context failed!\"" , "clang/lib/Sema/SemaLambda.cpp", 434, __extension__ __PRETTY_FUNCTION__ )); | |||
435 | HasKnownInternalLinkage = true; | |||
436 | } | |||
437 | if (MCtx) { | |||
438 | unsigned ManglingNumber = MCtx->getManglingNumber(Method); | |||
439 | Class->setLambdaMangling(ManglingNumber, ManglingContextDecl, | |||
440 | HasKnownInternalLinkage); | |||
441 | Class->setDeviceLambdaManglingNumber(MCtx->getDeviceManglingNumber(Method)); | |||
442 | } | |||
443 | } | |||
444 | ||||
445 | static void buildLambdaScopeReturnType(Sema &S, LambdaScopeInfo *LSI, | |||
446 | CXXMethodDecl *CallOperator, | |||
447 | bool ExplicitResultType) { | |||
448 | if (ExplicitResultType) { | |||
449 | LSI->HasImplicitReturnType = false; | |||
450 | LSI->ReturnType = CallOperator->getReturnType(); | |||
451 | if (!LSI->ReturnType->isDependentType() && !LSI->ReturnType->isVoidType()) | |||
452 | S.RequireCompleteType(CallOperator->getBeginLoc(), LSI->ReturnType, | |||
453 | diag::err_lambda_incomplete_result); | |||
454 | } else { | |||
455 | LSI->HasImplicitReturnType = true; | |||
456 | } | |||
457 | } | |||
458 | ||||
459 | void Sema::buildLambdaScope(LambdaScopeInfo *LSI, CXXMethodDecl *CallOperator, | |||
460 | SourceRange IntroducerRange, | |||
461 | LambdaCaptureDefault CaptureDefault, | |||
462 | SourceLocation CaptureDefaultLoc, | |||
463 | bool ExplicitParams, bool Mutable) { | |||
464 | LSI->CallOperator = CallOperator; | |||
465 | CXXRecordDecl *LambdaClass = CallOperator->getParent(); | |||
466 | LSI->Lambda = LambdaClass; | |||
467 | if (CaptureDefault == LCD_ByCopy) | |||
468 | LSI->ImpCaptureStyle = LambdaScopeInfo::ImpCap_LambdaByval; | |||
469 | else if (CaptureDefault == LCD_ByRef) | |||
470 | LSI->ImpCaptureStyle = LambdaScopeInfo::ImpCap_LambdaByref; | |||
471 | LSI->CaptureDefaultLoc = CaptureDefaultLoc; | |||
472 | LSI->IntroducerRange = IntroducerRange; | |||
473 | LSI->ExplicitParams = ExplicitParams; | |||
474 | LSI->Mutable = Mutable; | |||
475 | } | |||
476 | ||||
477 | void Sema::finishLambdaExplicitCaptures(LambdaScopeInfo *LSI) { | |||
478 | LSI->finishedExplicitCaptures(); | |||
479 | } | |||
480 | ||||
481 | void Sema::ActOnLambdaExplicitTemplateParameterList( | |||
482 | LambdaIntroducer &Intro, SourceLocation LAngleLoc, | |||
483 | ArrayRef<NamedDecl *> TParams, SourceLocation RAngleLoc, | |||
484 | ExprResult RequiresClause) { | |||
485 | LambdaScopeInfo *LSI = getCurLambda(); | |||
486 | assert(LSI && "Expected a lambda scope")(static_cast <bool> (LSI && "Expected a lambda scope" ) ? void (0) : __assert_fail ("LSI && \"Expected a lambda scope\"" , "clang/lib/Sema/SemaLambda.cpp", 486, __extension__ __PRETTY_FUNCTION__ )); | |||
487 | assert(LSI->NumExplicitTemplateParams == 0 &&(static_cast <bool> (LSI->NumExplicitTemplateParams == 0 && "Already acted on explicit template parameters" ) ? void (0) : __assert_fail ("LSI->NumExplicitTemplateParams == 0 && \"Already acted on explicit template parameters\"" , "clang/lib/Sema/SemaLambda.cpp", 488, __extension__ __PRETTY_FUNCTION__ )) | |||
488 | "Already acted on explicit template parameters")(static_cast <bool> (LSI->NumExplicitTemplateParams == 0 && "Already acted on explicit template parameters" ) ? void (0) : __assert_fail ("LSI->NumExplicitTemplateParams == 0 && \"Already acted on explicit template parameters\"" , "clang/lib/Sema/SemaLambda.cpp", 488, __extension__ __PRETTY_FUNCTION__ )); | |||
489 | assert(LSI->TemplateParams.empty() &&(static_cast <bool> (LSI->TemplateParams.empty() && "Explicit template parameters should come " "before invented (auto) ones" ) ? void (0) : __assert_fail ("LSI->TemplateParams.empty() && \"Explicit template parameters should come \" \"before invented (auto) ones\"" , "clang/lib/Sema/SemaLambda.cpp", 491, __extension__ __PRETTY_FUNCTION__ )) | |||
490 | "Explicit template parameters should come "(static_cast <bool> (LSI->TemplateParams.empty() && "Explicit template parameters should come " "before invented (auto) ones" ) ? void (0) : __assert_fail ("LSI->TemplateParams.empty() && \"Explicit template parameters should come \" \"before invented (auto) ones\"" , "clang/lib/Sema/SemaLambda.cpp", 491, __extension__ __PRETTY_FUNCTION__ )) | |||
491 | "before invented (auto) ones")(static_cast <bool> (LSI->TemplateParams.empty() && "Explicit template parameters should come " "before invented (auto) ones" ) ? void (0) : __assert_fail ("LSI->TemplateParams.empty() && \"Explicit template parameters should come \" \"before invented (auto) ones\"" , "clang/lib/Sema/SemaLambda.cpp", 491, __extension__ __PRETTY_FUNCTION__ )); | |||
492 | assert(!TParams.empty() &&(static_cast <bool> (!TParams.empty() && "No template parameters to act on" ) ? void (0) : __assert_fail ("!TParams.empty() && \"No template parameters to act on\"" , "clang/lib/Sema/SemaLambda.cpp", 493, __extension__ __PRETTY_FUNCTION__ )) | |||
493 | "No template parameters to act on")(static_cast <bool> (!TParams.empty() && "No template parameters to act on" ) ? void (0) : __assert_fail ("!TParams.empty() && \"No template parameters to act on\"" , "clang/lib/Sema/SemaLambda.cpp", 493, __extension__ __PRETTY_FUNCTION__ )); | |||
494 | LSI->TemplateParams.append(TParams.begin(), TParams.end()); | |||
495 | LSI->NumExplicitTemplateParams = TParams.size(); | |||
496 | LSI->ExplicitTemplateParamsRange = {LAngleLoc, RAngleLoc}; | |||
497 | LSI->RequiresClause = RequiresClause; | |||
498 | } | |||
499 | ||||
500 | /// If this expression is an enumerator-like expression of some type | |||
501 | /// T, return the type T; otherwise, return null. | |||
502 | /// | |||
503 | /// Pointer comparisons on the result here should always work because | |||
504 | /// it's derived from either the parent of an EnumConstantDecl | |||
505 | /// (i.e. the definition) or the declaration returned by | |||
506 | /// EnumType::getDecl() (i.e. the definition). | |||
507 | static EnumDecl *findEnumForBlockReturn(Expr *E) { | |||
508 | // An expression is an enumerator-like expression of type T if, | |||
509 | // ignoring parens and parens-like expressions: | |||
510 | E = E->IgnoreParens(); | |||
511 | ||||
512 | // - it is an enumerator whose enum type is T or | |||
513 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
514 | if (EnumConstantDecl *D | |||
515 | = dyn_cast<EnumConstantDecl>(DRE->getDecl())) { | |||
516 | return cast<EnumDecl>(D->getDeclContext()); | |||
517 | } | |||
518 | return nullptr; | |||
519 | } | |||
520 | ||||
521 | // - it is a comma expression whose RHS is an enumerator-like | |||
522 | // expression of type T or | |||
523 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
524 | if (BO->getOpcode() == BO_Comma) | |||
525 | return findEnumForBlockReturn(BO->getRHS()); | |||
526 | return nullptr; | |||
527 | } | |||
528 | ||||
529 | // - it is a statement-expression whose value expression is an | |||
530 | // enumerator-like expression of type T or | |||
531 | if (StmtExpr *SE = dyn_cast<StmtExpr>(E)) { | |||
532 | if (Expr *last = dyn_cast_or_null<Expr>(SE->getSubStmt()->body_back())) | |||
533 | return findEnumForBlockReturn(last); | |||
534 | return nullptr; | |||
535 | } | |||
536 | ||||
537 | // - it is a ternary conditional operator (not the GNU ?: | |||
538 | // extension) whose second and third operands are | |||
539 | // enumerator-like expressions of type T or | |||
540 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | |||
541 | if (EnumDecl *ED = findEnumForBlockReturn(CO->getTrueExpr())) | |||
542 | if (ED == findEnumForBlockReturn(CO->getFalseExpr())) | |||
543 | return ED; | |||
544 | return nullptr; | |||
545 | } | |||
546 | ||||
547 | // (implicitly:) | |||
548 | // - it is an implicit integral conversion applied to an | |||
549 | // enumerator-like expression of type T or | |||
550 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
551 | // We can sometimes see integral conversions in valid | |||
552 | // enumerator-like expressions. | |||
553 | if (ICE->getCastKind() == CK_IntegralCast) | |||
554 | return findEnumForBlockReturn(ICE->getSubExpr()); | |||
555 | ||||
556 | // Otherwise, just rely on the type. | |||
557 | } | |||
558 | ||||
559 | // - it is an expression of that formal enum type. | |||
560 | if (const EnumType *ET = E->getType()->getAs<EnumType>()) { | |||
561 | return ET->getDecl(); | |||
562 | } | |||
563 | ||||
564 | // Otherwise, nope. | |||
565 | return nullptr; | |||
566 | } | |||
567 | ||||
568 | /// Attempt to find a type T for which the returned expression of the | |||
569 | /// given statement is an enumerator-like expression of that type. | |||
570 | static EnumDecl *findEnumForBlockReturn(ReturnStmt *ret) { | |||
571 | if (Expr *retValue = ret->getRetValue()) | |||
572 | return findEnumForBlockReturn(retValue); | |||
573 | return nullptr; | |||
574 | } | |||
575 | ||||
576 | /// Attempt to find a common type T for which all of the returned | |||
577 | /// expressions in a block are enumerator-like expressions of that | |||
578 | /// type. | |||
579 | static EnumDecl *findCommonEnumForBlockReturns(ArrayRef<ReturnStmt*> returns) { | |||
580 | ArrayRef<ReturnStmt*>::iterator i = returns.begin(), e = returns.end(); | |||
581 | ||||
582 | // Try to find one for the first return. | |||
583 | EnumDecl *ED = findEnumForBlockReturn(*i); | |||
584 | if (!ED) return nullptr; | |||
585 | ||||
586 | // Check that the rest of the returns have the same enum. | |||
587 | for (++i; i != e; ++i) { | |||
588 | if (findEnumForBlockReturn(*i) != ED) | |||
589 | return nullptr; | |||
590 | } | |||
591 | ||||
592 | // Never infer an anonymous enum type. | |||
593 | if (!ED->hasNameForLinkage()) return nullptr; | |||
594 | ||||
595 | return ED; | |||
596 | } | |||
597 | ||||
598 | /// Adjust the given return statements so that they formally return | |||
599 | /// the given type. It should require, at most, an IntegralCast. | |||
600 | static void adjustBlockReturnsToEnum(Sema &S, ArrayRef<ReturnStmt*> returns, | |||
601 | QualType returnType) { | |||
602 | for (ArrayRef<ReturnStmt*>::iterator | |||
603 | i = returns.begin(), e = returns.end(); i != e; ++i) { | |||
604 | ReturnStmt *ret = *i; | |||
605 | Expr *retValue = ret->getRetValue(); | |||
606 | if (S.Context.hasSameType(retValue->getType(), returnType)) | |||
607 | continue; | |||
608 | ||||
609 | // Right now we only support integral fixup casts. | |||
610 | assert(returnType->isIntegralOrUnscopedEnumerationType())(static_cast <bool> (returnType->isIntegralOrUnscopedEnumerationType ()) ? void (0) : __assert_fail ("returnType->isIntegralOrUnscopedEnumerationType()" , "clang/lib/Sema/SemaLambda.cpp", 610, __extension__ __PRETTY_FUNCTION__ )); | |||
611 | assert(retValue->getType()->isIntegralOrUnscopedEnumerationType())(static_cast <bool> (retValue->getType()->isIntegralOrUnscopedEnumerationType ()) ? void (0) : __assert_fail ("retValue->getType()->isIntegralOrUnscopedEnumerationType()" , "clang/lib/Sema/SemaLambda.cpp", 611, __extension__ __PRETTY_FUNCTION__ )); | |||
612 | ||||
613 | ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(retValue); | |||
614 | ||||
615 | Expr *E = (cleanups ? cleanups->getSubExpr() : retValue); | |||
616 | E = ImplicitCastExpr::Create(S.Context, returnType, CK_IntegralCast, E, | |||
617 | /*base path*/ nullptr, VK_PRValue, | |||
618 | FPOptionsOverride()); | |||
619 | if (cleanups) { | |||
620 | cleanups->setSubExpr(E); | |||
621 | } else { | |||
622 | ret->setRetValue(E); | |||
623 | } | |||
624 | } | |||
625 | } | |||
626 | ||||
627 | void Sema::deduceClosureReturnType(CapturingScopeInfo &CSI) { | |||
628 | assert(CSI.HasImplicitReturnType)(static_cast <bool> (CSI.HasImplicitReturnType) ? void ( 0) : __assert_fail ("CSI.HasImplicitReturnType", "clang/lib/Sema/SemaLambda.cpp" , 628, __extension__ __PRETTY_FUNCTION__)); | |||
629 | // If it was ever a placeholder, it had to been deduced to DependentTy. | |||
630 | assert(CSI.ReturnType.isNull() || !CSI.ReturnType->isUndeducedType())(static_cast <bool> (CSI.ReturnType.isNull() || !CSI.ReturnType ->isUndeducedType()) ? void (0) : __assert_fail ("CSI.ReturnType.isNull() || !CSI.ReturnType->isUndeducedType()" , "clang/lib/Sema/SemaLambda.cpp", 630, __extension__ __PRETTY_FUNCTION__ )); | |||
631 | assert((!isa<LambdaScopeInfo>(CSI) || !getLangOpts().CPlusPlus14) &&(static_cast <bool> ((!isa<LambdaScopeInfo>(CSI) || !getLangOpts().CPlusPlus14) && "lambda expressions use auto deduction in C++14 onwards" ) ? void (0) : __assert_fail ("(!isa<LambdaScopeInfo>(CSI) || !getLangOpts().CPlusPlus14) && \"lambda expressions use auto deduction in C++14 onwards\"" , "clang/lib/Sema/SemaLambda.cpp", 632, __extension__ __PRETTY_FUNCTION__ )) | |||
632 | "lambda expressions use auto deduction in C++14 onwards")(static_cast <bool> ((!isa<LambdaScopeInfo>(CSI) || !getLangOpts().CPlusPlus14) && "lambda expressions use auto deduction in C++14 onwards" ) ? void (0) : __assert_fail ("(!isa<LambdaScopeInfo>(CSI) || !getLangOpts().CPlusPlus14) && \"lambda expressions use auto deduction in C++14 onwards\"" , "clang/lib/Sema/SemaLambda.cpp", 632, __extension__ __PRETTY_FUNCTION__ )); | |||
633 | ||||
634 | // C++ core issue 975: | |||
635 | // If a lambda-expression does not include a trailing-return-type, | |||
636 | // it is as if the trailing-return-type denotes the following type: | |||
637 | // - if there are no return statements in the compound-statement, | |||
638 | // or all return statements return either an expression of type | |||
639 | // void or no expression or braced-init-list, the type void; | |||
640 | // - otherwise, if all return statements return an expression | |||
641 | // and the types of the returned expressions after | |||
642 | // lvalue-to-rvalue conversion (4.1 [conv.lval]), | |||
643 | // array-to-pointer conversion (4.2 [conv.array]), and | |||
644 | // function-to-pointer conversion (4.3 [conv.func]) are the | |||
645 | // same, that common type; | |||
646 | // - otherwise, the program is ill-formed. | |||
647 | // | |||
648 | // C++ core issue 1048 additionally removes top-level cv-qualifiers | |||
649 | // from the types of returned expressions to match the C++14 auto | |||
650 | // deduction rules. | |||
651 | // | |||
652 | // In addition, in blocks in non-C++ modes, if all of the return | |||
653 | // statements are enumerator-like expressions of some type T, where | |||
654 | // T has a name for linkage, then we infer the return type of the | |||
655 | // block to be that type. | |||
656 | ||||
657 | // First case: no return statements, implicit void return type. | |||
658 | ASTContext &Ctx = getASTContext(); | |||
659 | if (CSI.Returns.empty()) { | |||
660 | // It's possible there were simply no /valid/ return statements. | |||
661 | // In this case, the first one we found may have at least given us a type. | |||
662 | if (CSI.ReturnType.isNull()) | |||
663 | CSI.ReturnType = Ctx.VoidTy; | |||
664 | return; | |||
665 | } | |||
666 | ||||
667 | // Second case: at least one return statement has dependent type. | |||
668 | // Delay type checking until instantiation. | |||
669 | assert(!CSI.ReturnType.isNull() && "We should have a tentative return type.")(static_cast <bool> (!CSI.ReturnType.isNull() && "We should have a tentative return type.") ? void (0) : __assert_fail ("!CSI.ReturnType.isNull() && \"We should have a tentative return type.\"" , "clang/lib/Sema/SemaLambda.cpp", 669, __extension__ __PRETTY_FUNCTION__ )); | |||
670 | if (CSI.ReturnType->isDependentType()) | |||
671 | return; | |||
672 | ||||
673 | // Try to apply the enum-fuzz rule. | |||
674 | if (!getLangOpts().CPlusPlus) { | |||
675 | assert(isa<BlockScopeInfo>(CSI))(static_cast <bool> (isa<BlockScopeInfo>(CSI)) ? void (0) : __assert_fail ("isa<BlockScopeInfo>(CSI)", "clang/lib/Sema/SemaLambda.cpp" , 675, __extension__ __PRETTY_FUNCTION__)); | |||
676 | const EnumDecl *ED = findCommonEnumForBlockReturns(CSI.Returns); | |||
677 | if (ED) { | |||
678 | CSI.ReturnType = Context.getTypeDeclType(ED); | |||
679 | adjustBlockReturnsToEnum(*this, CSI.Returns, CSI.ReturnType); | |||
680 | return; | |||
681 | } | |||
682 | } | |||
683 | ||||
684 | // Third case: only one return statement. Don't bother doing extra work! | |||
685 | if (CSI.Returns.size() == 1) | |||
686 | return; | |||
687 | ||||
688 | // General case: many return statements. | |||
689 | // Check that they all have compatible return types. | |||
690 | ||||
691 | // We require the return types to strictly match here. | |||
692 | // Note that we've already done the required promotions as part of | |||
693 | // processing the return statement. | |||
694 | for (const ReturnStmt *RS : CSI.Returns) { | |||
695 | const Expr *RetE = RS->getRetValue(); | |||
696 | ||||
697 | QualType ReturnType = | |||
698 | (RetE ? RetE->getType() : Context.VoidTy).getUnqualifiedType(); | |||
699 | if (Context.getCanonicalFunctionResultType(ReturnType) == | |||
700 | Context.getCanonicalFunctionResultType(CSI.ReturnType)) { | |||
701 | // Use the return type with the strictest possible nullability annotation. | |||
702 | auto RetTyNullability = ReturnType->getNullability(); | |||
703 | auto BlockNullability = CSI.ReturnType->getNullability(); | |||
704 | if (BlockNullability && | |||
705 | (!RetTyNullability || | |||
706 | hasWeakerNullability(*RetTyNullability, *BlockNullability))) | |||
707 | CSI.ReturnType = ReturnType; | |||
708 | continue; | |||
709 | } | |||
710 | ||||
711 | // FIXME: This is a poor diagnostic for ReturnStmts without expressions. | |||
712 | // TODO: It's possible that the *first* return is the divergent one. | |||
713 | Diag(RS->getBeginLoc(), | |||
714 | diag::err_typecheck_missing_return_type_incompatible) | |||
715 | << ReturnType << CSI.ReturnType << isa<LambdaScopeInfo>(CSI); | |||
716 | // Continue iterating so that we keep emitting diagnostics. | |||
717 | } | |||
718 | } | |||
719 | ||||
720 | QualType Sema::buildLambdaInitCaptureInitialization( | |||
721 | SourceLocation Loc, bool ByRef, SourceLocation EllipsisLoc, | |||
722 | std::optional<unsigned> NumExpansions, IdentifierInfo *Id, | |||
723 | bool IsDirectInit, Expr *&Init) { | |||
724 | // Create an 'auto' or 'auto&' TypeSourceInfo that we can use to | |||
725 | // deduce against. | |||
726 | QualType DeductType = Context.getAutoDeductType(); | |||
727 | TypeLocBuilder TLB; | |||
728 | AutoTypeLoc TL = TLB.push<AutoTypeLoc>(DeductType); | |||
729 | TL.setNameLoc(Loc); | |||
730 | if (ByRef) { | |||
731 | DeductType = BuildReferenceType(DeductType, true, Loc, Id); | |||
732 | assert(!DeductType.isNull() && "can't build reference to auto")(static_cast <bool> (!DeductType.isNull() && "can't build reference to auto" ) ? void (0) : __assert_fail ("!DeductType.isNull() && \"can't build reference to auto\"" , "clang/lib/Sema/SemaLambda.cpp", 732, __extension__ __PRETTY_FUNCTION__ )); | |||
733 | TLB.push<ReferenceTypeLoc>(DeductType).setSigilLoc(Loc); | |||
734 | } | |||
735 | if (EllipsisLoc.isValid()) { | |||
736 | if (Init->containsUnexpandedParameterPack()) { | |||
737 | Diag(EllipsisLoc, getLangOpts().CPlusPlus20 | |||
738 | ? diag::warn_cxx17_compat_init_capture_pack | |||
739 | : diag::ext_init_capture_pack); | |||
740 | DeductType = Context.getPackExpansionType(DeductType, NumExpansions, | |||
741 | /*ExpectPackInType=*/false); | |||
742 | TLB.push<PackExpansionTypeLoc>(DeductType).setEllipsisLoc(EllipsisLoc); | |||
743 | } else { | |||
744 | // Just ignore the ellipsis for now and form a non-pack variable. We'll | |||
745 | // diagnose this later when we try to capture it. | |||
746 | } | |||
747 | } | |||
748 | TypeSourceInfo *TSI = TLB.getTypeSourceInfo(Context, DeductType); | |||
749 | ||||
750 | // Deduce the type of the init capture. | |||
751 | QualType DeducedType = deduceVarTypeFromInitializer( | |||
752 | /*VarDecl*/nullptr, DeclarationName(Id), DeductType, TSI, | |||
753 | SourceRange(Loc, Loc), IsDirectInit, Init); | |||
754 | if (DeducedType.isNull()) | |||
755 | return QualType(); | |||
756 | ||||
757 | // Are we a non-list direct initialization? | |||
758 | ParenListExpr *CXXDirectInit = dyn_cast<ParenListExpr>(Init); | |||
759 | ||||
760 | // Perform initialization analysis and ensure any implicit conversions | |||
761 | // (such as lvalue-to-rvalue) are enforced. | |||
762 | InitializedEntity Entity = | |||
763 | InitializedEntity::InitializeLambdaCapture(Id, DeducedType, Loc); | |||
764 | InitializationKind Kind = | |||
765 | IsDirectInit | |||
766 | ? (CXXDirectInit ? InitializationKind::CreateDirect( | |||
767 | Loc, Init->getBeginLoc(), Init->getEndLoc()) | |||
768 | : InitializationKind::CreateDirectList(Loc)) | |||
769 | : InitializationKind::CreateCopy(Loc, Init->getBeginLoc()); | |||
770 | ||||
771 | MultiExprArg Args = Init; | |||
772 | if (CXXDirectInit) | |||
773 | Args = | |||
774 | MultiExprArg(CXXDirectInit->getExprs(), CXXDirectInit->getNumExprs()); | |||
775 | QualType DclT; | |||
776 | InitializationSequence InitSeq(*this, Entity, Kind, Args); | |||
777 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Args, &DclT); | |||
778 | ||||
779 | if (Result.isInvalid()) | |||
780 | return QualType(); | |||
781 | ||||
782 | Init = Result.getAs<Expr>(); | |||
783 | return DeducedType; | |||
784 | } | |||
785 | ||||
786 | VarDecl *Sema::createLambdaInitCaptureVarDecl( | |||
787 | SourceLocation Loc, QualType InitCaptureType, SourceLocation EllipsisLoc, | |||
788 | IdentifierInfo *Id, unsigned InitStyle, Expr *Init, DeclContext *DeclCtx) { | |||
789 | // FIXME: Retain the TypeSourceInfo from buildLambdaInitCaptureInitialization | |||
790 | // rather than reconstructing it here. | |||
791 | TypeSourceInfo *TSI = Context.getTrivialTypeSourceInfo(InitCaptureType, Loc); | |||
792 | if (auto PETL = TSI->getTypeLoc().getAs<PackExpansionTypeLoc>()) | |||
793 | PETL.setEllipsisLoc(EllipsisLoc); | |||
794 | ||||
795 | // Create a dummy variable representing the init-capture. This is not actually | |||
796 | // used as a variable, and only exists as a way to name and refer to the | |||
797 | // init-capture. | |||
798 | // FIXME: Pass in separate source locations for '&' and identifier. | |||
799 | VarDecl *NewVD = VarDecl::Create(Context, DeclCtx, Loc, Loc, Id, | |||
800 | InitCaptureType, TSI, SC_Auto); | |||
801 | NewVD->setInitCapture(true); | |||
802 | NewVD->setReferenced(true); | |||
803 | // FIXME: Pass in a VarDecl::InitializationStyle. | |||
804 | NewVD->setInitStyle(static_cast<VarDecl::InitializationStyle>(InitStyle)); | |||
805 | NewVD->markUsed(Context); | |||
806 | NewVD->setInit(Init); | |||
807 | if (NewVD->isParameterPack()) | |||
808 | getCurLambda()->LocalPacks.push_back(NewVD); | |||
809 | return NewVD; | |||
810 | } | |||
811 | ||||
812 | void Sema::addInitCapture(LambdaScopeInfo *LSI, VarDecl *Var, | |||
813 | bool isReferenceType) { | |||
814 | assert(Var->isInitCapture() && "init capture flag should be set")(static_cast <bool> (Var->isInitCapture() && "init capture flag should be set") ? void (0) : __assert_fail ("Var->isInitCapture() && \"init capture flag should be set\"" , "clang/lib/Sema/SemaLambda.cpp", 814, __extension__ __PRETTY_FUNCTION__ )); | |||
815 | LSI->addCapture(Var, /*isBlock*/ false, isReferenceType, | |||
816 | /*isNested*/ false, Var->getLocation(), SourceLocation(), | |||
817 | Var->getType(), /*Invalid*/ false); | |||
818 | } | |||
819 | ||||
820 | // Unlike getCurLambda, getCurrentLambdaScopeUnsafe doesn't | |||
821 | // check that the current lambda is in a consistent or fully constructed state. | |||
822 | static LambdaScopeInfo *getCurrentLambdaScopeUnsafe(Sema &S) { | |||
823 | assert(!S.FunctionScopes.empty())(static_cast <bool> (!S.FunctionScopes.empty()) ? void ( 0) : __assert_fail ("!S.FunctionScopes.empty()", "clang/lib/Sema/SemaLambda.cpp" , 823, __extension__ __PRETTY_FUNCTION__)); | |||
824 | return cast<LambdaScopeInfo>(S.FunctionScopes[S.FunctionScopes.size() - 1]); | |||
825 | } | |||
826 | ||||
827 | static TypeSourceInfo * | |||
828 | getDummyLambdaType(Sema &S, SourceLocation Loc = SourceLocation()) { | |||
829 | // C++11 [expr.prim.lambda]p4: | |||
830 | // If a lambda-expression does not include a lambda-declarator, it is as | |||
831 | // if the lambda-declarator were (). | |||
832 | FunctionProtoType::ExtProtoInfo EPI(S.Context.getDefaultCallingConvention( | |||
833 | /*IsVariadic=*/false, /*IsCXXMethod=*/true)); | |||
834 | EPI.HasTrailingReturn = true; | |||
835 | EPI.TypeQuals.addConst(); | |||
836 | LangAS AS = S.getDefaultCXXMethodAddrSpace(); | |||
837 | if (AS != LangAS::Default) | |||
838 | EPI.TypeQuals.addAddressSpace(AS); | |||
839 | ||||
840 | // C++1y [expr.prim.lambda]: | |||
841 | // The lambda return type is 'auto', which is replaced by the | |||
842 | // trailing-return type if provided and/or deduced from 'return' | |||
843 | // statements | |||
844 | // We don't do this before C++1y, because we don't support deduced return | |||
845 | // types there. | |||
846 | QualType DefaultTypeForNoTrailingReturn = S.getLangOpts().CPlusPlus14 | |||
847 | ? S.Context.getAutoDeductType() | |||
848 | : S.Context.DependentTy; | |||
849 | QualType MethodTy = S.Context.getFunctionType(DefaultTypeForNoTrailingReturn, | |||
850 | std::nullopt, EPI); | |||
851 | return S.Context.getTrivialTypeSourceInfo(MethodTy, Loc); | |||
852 | } | |||
853 | ||||
854 | static TypeSourceInfo *getLambdaType(Sema &S, LambdaIntroducer &Intro, | |||
855 | Declarator &ParamInfo, Scope *CurScope, | |||
856 | SourceLocation Loc, | |||
857 | bool &ExplicitResultType) { | |||
858 | ||||
859 | ExplicitResultType = false; | |||
860 | ||||
861 | assert((static_cast <bool> ((ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_static) && "Unexpected storage specifier" ) ? void (0) : __assert_fail ("(ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) && \"Unexpected storage specifier\"" , "clang/lib/Sema/SemaLambda.cpp", 865, __extension__ __PRETTY_FUNCTION__ )) | |||
862 | (ParamInfo.getDeclSpec().getStorageClassSpec() ==(static_cast <bool> ((ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_static) && "Unexpected storage specifier" ) ? void (0) : __assert_fail ("(ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) && \"Unexpected storage specifier\"" , "clang/lib/Sema/SemaLambda.cpp", 865, __extension__ __PRETTY_FUNCTION__ )) | |||
863 | DeclSpec::SCS_unspecified ||(static_cast <bool> ((ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_static) && "Unexpected storage specifier" ) ? void (0) : __assert_fail ("(ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) && \"Unexpected storage specifier\"" , "clang/lib/Sema/SemaLambda.cpp", 865, __extension__ __PRETTY_FUNCTION__ )) | |||
864 | ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) &&(static_cast <bool> ((ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_static) && "Unexpected storage specifier" ) ? void (0) : __assert_fail ("(ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) && \"Unexpected storage specifier\"" , "clang/lib/Sema/SemaLambda.cpp", 865, __extension__ __PRETTY_FUNCTION__ )) | |||
865 | "Unexpected storage specifier")(static_cast <bool> ((ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec () == DeclSpec::SCS_static) && "Unexpected storage specifier" ) ? void (0) : __assert_fail ("(ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_unspecified || ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) && \"Unexpected storage specifier\"" , "clang/lib/Sema/SemaLambda.cpp", 865, __extension__ __PRETTY_FUNCTION__ )); | |||
866 | bool IsLambdaStatic = | |||
867 | ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static; | |||
868 | ||||
869 | TypeSourceInfo *MethodTyInfo; | |||
870 | ||||
871 | if (ParamInfo.getNumTypeObjects() == 0) { | |||
872 | MethodTyInfo = getDummyLambdaType(S, Loc); | |||
873 | } else { | |||
874 | DeclaratorChunk::FunctionTypeInfo &FTI = ParamInfo.getFunctionTypeInfo(); | |||
875 | ExplicitResultType = FTI.hasTrailingReturnType(); | |||
876 | if (!FTI.hasMutableQualifier() && !IsLambdaStatic) | |||
877 | FTI.getOrCreateMethodQualifiers().SetTypeQual(DeclSpec::TQ_const, Loc); | |||
878 | ||||
879 | if (ExplicitResultType && S.getLangOpts().HLSL) { | |||
880 | QualType RetTy = FTI.getTrailingReturnType().get(); | |||
881 | if (!RetTy.isNull()) { | |||
882 | // HLSL does not support specifying an address space on a lambda return | |||
883 | // type. | |||
884 | LangAS AddressSpace = RetTy.getAddressSpace(); | |||
885 | if (AddressSpace != LangAS::Default) | |||
886 | S.Diag(FTI.getTrailingReturnTypeLoc(), | |||
887 | diag::err_return_value_with_address_space); | |||
888 | } | |||
889 | } | |||
890 | ||||
891 | MethodTyInfo = S.GetTypeForDeclarator(ParamInfo, CurScope); | |||
892 | assert(MethodTyInfo && "no type from lambda-declarator")(static_cast <bool> (MethodTyInfo && "no type from lambda-declarator" ) ? void (0) : __assert_fail ("MethodTyInfo && \"no type from lambda-declarator\"" , "clang/lib/Sema/SemaLambda.cpp", 892, __extension__ __PRETTY_FUNCTION__ )); | |||
893 | ||||
894 | // Check for unexpanded parameter packs in the method type. | |||
895 | if (MethodTyInfo->getType()->containsUnexpandedParameterPack()) | |||
896 | S.DiagnoseUnexpandedParameterPack(Intro.Range.getBegin(), MethodTyInfo, | |||
897 | S.UPPC_DeclarationType); | |||
898 | } | |||
899 | return MethodTyInfo; | |||
900 | } | |||
901 | ||||
902 | CXXMethodDecl *Sema::CreateLambdaCallOperator(SourceRange IntroducerRange, | |||
903 | CXXRecordDecl *Class) { | |||
904 | ||||
905 | // C++20 [expr.prim.lambda.closure]p3: | |||
906 | // The closure type for a lambda-expression has a public inline function | |||
907 | // call operator (for a non-generic lambda) or function call operator | |||
908 | // template (for a generic lambda) whose parameters and return type are | |||
909 | // described by the lambda-expression's parameter-declaration-clause | |||
910 | // and trailing-return-type respectively. | |||
911 | DeclarationName MethodName = | |||
912 | Context.DeclarationNames.getCXXOperatorName(OO_Call); | |||
913 | DeclarationNameLoc MethodNameLoc = | |||
914 | DeclarationNameLoc::makeCXXOperatorNameLoc(IntroducerRange.getBegin()); | |||
915 | CXXMethodDecl *Method = CXXMethodDecl::Create( | |||
916 | Context, Class, SourceLocation(), | |||
917 | DeclarationNameInfo(MethodName, IntroducerRange.getBegin(), | |||
918 | MethodNameLoc), | |||
919 | QualType(), /*Tinfo=*/nullptr, SC_None, | |||
920 | getCurFPFeatures().isFPConstrained(), | |||
921 | /*isInline=*/true, ConstexprSpecKind::Unspecified, SourceLocation(), | |||
922 | /*TrailingRequiresClause=*/nullptr); | |||
923 | Method->setAccess(AS_public); | |||
924 | return Method; | |||
925 | } | |||
926 | ||||
927 | void Sema::CompleteLambdaCallOperator( | |||
928 | CXXMethodDecl *Method, SourceLocation LambdaLoc, | |||
929 | SourceLocation CallOperatorLoc, Expr *TrailingRequiresClause, | |||
930 | TypeSourceInfo *MethodTyInfo, ConstexprSpecKind ConstexprKind, | |||
931 | StorageClass SC, ArrayRef<ParmVarDecl *> Params, | |||
932 | bool HasExplicitResultType) { | |||
933 | ||||
934 | LambdaScopeInfo *LSI = getCurrentLambdaScopeUnsafe(*this); | |||
935 | ||||
936 | if (TrailingRequiresClause) | |||
937 | Method->setTrailingRequiresClause(TrailingRequiresClause); | |||
938 | ||||
939 | TemplateParameterList *TemplateParams = | |||
940 | getGenericLambdaTemplateParameterList(LSI, *this); | |||
941 | ||||
942 | DeclContext *DC = Method->getLexicalDeclContext(); | |||
943 | Method->setLexicalDeclContext(LSI->Lambda); | |||
944 | if (TemplateParams) { | |||
945 | FunctionTemplateDecl *TemplateMethod = FunctionTemplateDecl::Create( | |||
946 | Context, LSI->Lambda, Method->getLocation(), Method->getDeclName(), | |||
947 | TemplateParams, Method); | |||
948 | TemplateMethod->setAccess(AS_public); | |||
949 | Method->setDescribedFunctionTemplate(TemplateMethod); | |||
950 | LSI->Lambda->addDecl(TemplateMethod); | |||
951 | TemplateMethod->setLexicalDeclContext(DC); | |||
952 | } else { | |||
953 | LSI->Lambda->addDecl(Method); | |||
954 | } | |||
955 | LSI->Lambda->setLambdaIsGeneric(TemplateParams); | |||
956 | LSI->Lambda->setLambdaTypeInfo(MethodTyInfo); | |||
957 | ||||
958 | Method->setLexicalDeclContext(DC); | |||
959 | Method->setLocation(LambdaLoc); | |||
960 | Method->setInnerLocStart(CallOperatorLoc); | |||
961 | Method->setTypeSourceInfo(MethodTyInfo); | |||
962 | Method->setType(buildTypeForLambdaCallOperator(*this, LSI->Lambda, | |||
963 | TemplateParams, MethodTyInfo)); | |||
964 | Method->setConstexprKind(ConstexprKind); | |||
965 | Method->setStorageClass(SC); | |||
966 | if (!Params.empty()) { | |||
967 | CheckParmsForFunctionDef(Params, /*CheckParameterNames=*/false); | |||
968 | Method->setParams(Params); | |||
969 | for (auto P : Method->parameters()) { | |||
970 | if (!P) | |||
971 | continue; | |||
972 | P->setOwningFunction(Method); | |||
973 | } | |||
974 | } | |||
975 | ||||
976 | buildLambdaScopeReturnType(*this, LSI, Method, HasExplicitResultType); | |||
977 | } | |||
978 | ||||
979 | void Sema::ActOnLambdaExpressionAfterIntroducer(LambdaIntroducer &Intro, | |||
980 | Scope *CurrentScope) { | |||
981 | ||||
982 | LambdaScopeInfo *LSI = getCurLambda(); | |||
983 | assert(LSI && "LambdaScopeInfo should be on stack!")(static_cast <bool> (LSI && "LambdaScopeInfo should be on stack!" ) ? void (0) : __assert_fail ("LSI && \"LambdaScopeInfo should be on stack!\"" , "clang/lib/Sema/SemaLambda.cpp", 983, __extension__ __PRETTY_FUNCTION__ )); | |||
984 | ||||
985 | if (Intro.Default == LCD_ByCopy) | |||
986 | LSI->ImpCaptureStyle = LambdaScopeInfo::ImpCap_LambdaByval; | |||
987 | else if (Intro.Default == LCD_ByRef) | |||
988 | LSI->ImpCaptureStyle = LambdaScopeInfo::ImpCap_LambdaByref; | |||
989 | LSI->CaptureDefaultLoc = Intro.DefaultLoc; | |||
990 | LSI->IntroducerRange = Intro.Range; | |||
991 | LSI->AfterParameterList = false; | |||
992 | ||||
993 | assert(LSI->NumExplicitTemplateParams == 0)(static_cast <bool> (LSI->NumExplicitTemplateParams == 0) ? void (0) : __assert_fail ("LSI->NumExplicitTemplateParams == 0" , "clang/lib/Sema/SemaLambda.cpp", 993, __extension__ __PRETTY_FUNCTION__ )); | |||
994 | ||||
995 | // Determine if we're within a context where we know that the lambda will | |||
996 | // be dependent, because there are template parameters in scope. | |||
997 | CXXRecordDecl::LambdaDependencyKind LambdaDependencyKind = | |||
998 | CXXRecordDecl::LDK_Unknown; | |||
999 | if (LSI->NumExplicitTemplateParams > 0) { | |||
1000 | Scope *TemplateParamScope = CurScope->getTemplateParamParent(); | |||
1001 | assert(TemplateParamScope &&(static_cast <bool> (TemplateParamScope && "Lambda with explicit template param list should establish a " "template param scope") ? void (0) : __assert_fail ("TemplateParamScope && \"Lambda with explicit template param list should establish a \" \"template param scope\"" , "clang/lib/Sema/SemaLambda.cpp", 1003, __extension__ __PRETTY_FUNCTION__ )) | |||
1002 | "Lambda with explicit template param list should establish a "(static_cast <bool> (TemplateParamScope && "Lambda with explicit template param list should establish a " "template param scope") ? void (0) : __assert_fail ("TemplateParamScope && \"Lambda with explicit template param list should establish a \" \"template param scope\"" , "clang/lib/Sema/SemaLambda.cpp", 1003, __extension__ __PRETTY_FUNCTION__ )) | |||
1003 | "template param scope")(static_cast <bool> (TemplateParamScope && "Lambda with explicit template param list should establish a " "template param scope") ? void (0) : __assert_fail ("TemplateParamScope && \"Lambda with explicit template param list should establish a \" \"template param scope\"" , "clang/lib/Sema/SemaLambda.cpp", 1003, __extension__ __PRETTY_FUNCTION__ )); | |||
1004 | assert(TemplateParamScope->getParent())(static_cast <bool> (TemplateParamScope->getParent() ) ? void (0) : __assert_fail ("TemplateParamScope->getParent()" , "clang/lib/Sema/SemaLambda.cpp", 1004, __extension__ __PRETTY_FUNCTION__ )); | |||
1005 | if (TemplateParamScope->getParent()->getTemplateParamParent() != nullptr) | |||
1006 | LambdaDependencyKind = CXXRecordDecl::LDK_AlwaysDependent; | |||
1007 | } else if (CurScope->getTemplateParamParent() != nullptr) { | |||
1008 | LambdaDependencyKind = CXXRecordDecl::LDK_AlwaysDependent; | |||
1009 | } | |||
1010 | ||||
1011 | CXXRecordDecl *Class = createLambdaClosureType( | |||
1012 | Intro.Range, /*Info=*/nullptr, LambdaDependencyKind, Intro.Default); | |||
1013 | LSI->Lambda = Class; | |||
1014 | ||||
1015 | CXXMethodDecl *Method = CreateLambdaCallOperator(Intro.Range, Class); | |||
1016 | LSI->CallOperator = Method; | |||
1017 | Method->setLexicalDeclContext(CurContext); | |||
1018 | ||||
1019 | PushDeclContext(CurScope, Method); | |||
1020 | ||||
1021 | bool ContainsUnexpandedParameterPack = false; | |||
1022 | ||||
1023 | // Distinct capture names, for diagnostics. | |||
1024 | llvm::DenseMap<IdentifierInfo *, ValueDecl *> CaptureNames; | |||
1025 | ||||
1026 | // Handle explicit captures. | |||
1027 | SourceLocation PrevCaptureLoc = | |||
1028 | Intro.Default == LCD_None ? Intro.Range.getBegin() : Intro.DefaultLoc; | |||
1029 | for (auto C = Intro.Captures.begin(), E = Intro.Captures.end(); C != E; | |||
1030 | PrevCaptureLoc = C->Loc, ++C) { | |||
1031 | if (C->Kind == LCK_This || C->Kind == LCK_StarThis) { | |||
1032 | if (C->Kind == LCK_StarThis) | |||
1033 | Diag(C->Loc, !getLangOpts().CPlusPlus17 | |||
1034 | ? diag::ext_star_this_lambda_capture_cxx17 | |||
1035 | : diag::warn_cxx14_compat_star_this_lambda_capture); | |||
1036 | ||||
1037 | // C++11 [expr.prim.lambda]p8: | |||
1038 | // An identifier or this shall not appear more than once in a | |||
1039 | // lambda-capture. | |||
1040 | if (LSI->isCXXThisCaptured()) { | |||
1041 | Diag(C->Loc, diag::err_capture_more_than_once) | |||
1042 | << "'this'" << SourceRange(LSI->getCXXThisCapture().getLocation()) | |||
1043 | << FixItHint::CreateRemoval( | |||
1044 | SourceRange(getLocForEndOfToken(PrevCaptureLoc), C->Loc)); | |||
1045 | continue; | |||
1046 | } | |||
1047 | ||||
1048 | // C++20 [expr.prim.lambda]p8: | |||
1049 | // If a lambda-capture includes a capture-default that is =, | |||
1050 | // each simple-capture of that lambda-capture shall be of the form | |||
1051 | // "&identifier", "this", or "* this". [ Note: The form [&,this] is | |||
1052 | // redundant but accepted for compatibility with ISO C++14. --end note ] | |||
1053 | if (Intro.Default == LCD_ByCopy && C->Kind != LCK_StarThis) | |||
1054 | Diag(C->Loc, !getLangOpts().CPlusPlus20 | |||
1055 | ? diag::ext_equals_this_lambda_capture_cxx20 | |||
1056 | : diag::warn_cxx17_compat_equals_this_lambda_capture); | |||
1057 | ||||
1058 | // C++11 [expr.prim.lambda]p12: | |||
1059 | // If this is captured by a local lambda expression, its nearest | |||
1060 | // enclosing function shall be a non-static member function. | |||
1061 | QualType ThisCaptureType = getCurrentThisType(); | |||
1062 | if (ThisCaptureType.isNull()) { | |||
1063 | Diag(C->Loc, diag::err_this_capture) << true; | |||
1064 | continue; | |||
1065 | } | |||
1066 | ||||
1067 | CheckCXXThisCapture(C->Loc, /*Explicit=*/true, /*BuildAndDiagnose*/ true, | |||
1068 | /*FunctionScopeIndexToStopAtPtr*/ nullptr, | |||
1069 | C->Kind == LCK_StarThis); | |||
1070 | if (!LSI->Captures.empty()) | |||
1071 | LSI->ExplicitCaptureRanges[LSI->Captures.size() - 1] = C->ExplicitRange; | |||
1072 | continue; | |||
1073 | } | |||
1074 | ||||
1075 | assert(C->Id && "missing identifier for capture")(static_cast <bool> (C->Id && "missing identifier for capture" ) ? void (0) : __assert_fail ("C->Id && \"missing identifier for capture\"" , "clang/lib/Sema/SemaLambda.cpp", 1075, __extension__ __PRETTY_FUNCTION__ )); | |||
1076 | ||||
1077 | if (C->Init.isInvalid()) | |||
1078 | continue; | |||
1079 | ||||
1080 | ValueDecl *Var = nullptr; | |||
1081 | if (C->Init.isUsable()) { | |||
1082 | Diag(C->Loc, getLangOpts().CPlusPlus14 | |||
1083 | ? diag::warn_cxx11_compat_init_capture | |||
1084 | : diag::ext_init_capture); | |||
1085 | ||||
1086 | // If the initializer expression is usable, but the InitCaptureType | |||
1087 | // is not, then an error has occurred - so ignore the capture for now. | |||
1088 | // for e.g., [n{0}] { }; <-- if no <initializer_list> is included. | |||
1089 | // FIXME: we should create the init capture variable and mark it invalid | |||
1090 | // in this case. | |||
1091 | if (C->InitCaptureType.get().isNull()) | |||
1092 | continue; | |||
1093 | ||||
1094 | if (C->Init.get()->containsUnexpandedParameterPack() && | |||
1095 | !C->InitCaptureType.get()->getAs<PackExpansionType>()) | |||
1096 | DiagnoseUnexpandedParameterPack(C->Init.get(), UPPC_Initializer); | |||
1097 | ||||
1098 | unsigned InitStyle; | |||
1099 | switch (C->InitKind) { | |||
1100 | case LambdaCaptureInitKind::NoInit: | |||
1101 | llvm_unreachable("not an init-capture?")::llvm::llvm_unreachable_internal("not an init-capture?", "clang/lib/Sema/SemaLambda.cpp" , 1101); | |||
1102 | case LambdaCaptureInitKind::CopyInit: | |||
1103 | InitStyle = VarDecl::CInit; | |||
1104 | break; | |||
1105 | case LambdaCaptureInitKind::DirectInit: | |||
1106 | InitStyle = VarDecl::CallInit; | |||
1107 | break; | |||
1108 | case LambdaCaptureInitKind::ListInit: | |||
1109 | InitStyle = VarDecl::ListInit; | |||
1110 | break; | |||
1111 | } | |||
1112 | Var = createLambdaInitCaptureVarDecl(C->Loc, C->InitCaptureType.get(), | |||
1113 | C->EllipsisLoc, C->Id, InitStyle, | |||
1114 | C->Init.get(), Method); | |||
1115 | assert(Var && "createLambdaInitCaptureVarDecl returned a null VarDecl?")(static_cast <bool> (Var && "createLambdaInitCaptureVarDecl returned a null VarDecl?" ) ? void (0) : __assert_fail ("Var && \"createLambdaInitCaptureVarDecl returned a null VarDecl?\"" , "clang/lib/Sema/SemaLambda.cpp", 1115, __extension__ __PRETTY_FUNCTION__ )); | |||
1116 | if (auto *V = dyn_cast<VarDecl>(Var)) | |||
1117 | CheckShadow(CurrentScope, V); | |||
1118 | PushOnScopeChains(Var, CurrentScope, false); | |||
1119 | } else { | |||
1120 | assert(C->InitKind == LambdaCaptureInitKind::NoInit &&(static_cast <bool> (C->InitKind == LambdaCaptureInitKind ::NoInit && "init capture has valid but null init?") ? void (0) : __assert_fail ("C->InitKind == LambdaCaptureInitKind::NoInit && \"init capture has valid but null init?\"" , "clang/lib/Sema/SemaLambda.cpp", 1121, __extension__ __PRETTY_FUNCTION__ )) | |||
1121 | "init capture has valid but null init?")(static_cast <bool> (C->InitKind == LambdaCaptureInitKind ::NoInit && "init capture has valid but null init?") ? void (0) : __assert_fail ("C->InitKind == LambdaCaptureInitKind::NoInit && \"init capture has valid but null init?\"" , "clang/lib/Sema/SemaLambda.cpp", 1121, __extension__ __PRETTY_FUNCTION__ )); | |||
1122 | ||||
1123 | // C++11 [expr.prim.lambda]p8: | |||
1124 | // If a lambda-capture includes a capture-default that is &, the | |||
1125 | // identifiers in the lambda-capture shall not be preceded by &. | |||
1126 | // If a lambda-capture includes a capture-default that is =, [...] | |||
1127 | // each identifier it contains shall be preceded by &. | |||
1128 | if (C->Kind == LCK_ByRef && Intro.Default == LCD_ByRef) { | |||
1129 | Diag(C->Loc, diag::err_reference_capture_with_reference_default) | |||
1130 | << FixItHint::CreateRemoval( | |||
1131 | SourceRange(getLocForEndOfToken(PrevCaptureLoc), C->Loc)); | |||
1132 | continue; | |||
1133 | } else if (C->Kind == LCK_ByCopy && Intro.Default == LCD_ByCopy) { | |||
1134 | Diag(C->Loc, diag::err_copy_capture_with_copy_default) | |||
1135 | << FixItHint::CreateRemoval( | |||
1136 | SourceRange(getLocForEndOfToken(PrevCaptureLoc), C->Loc)); | |||
1137 | continue; | |||
1138 | } | |||
1139 | ||||
1140 | // C++11 [expr.prim.lambda]p10: | |||
1141 | // The identifiers in a capture-list are looked up using the usual | |||
1142 | // rules for unqualified name lookup (3.4.1) | |||
1143 | DeclarationNameInfo Name(C->Id, C->Loc); | |||
1144 | LookupResult R(*this, Name, LookupOrdinaryName); | |||
1145 | LookupName(R, CurScope); | |||
1146 | if (R.isAmbiguous()) | |||
1147 | continue; | |||
1148 | if (R.empty()) { | |||
1149 | // FIXME: Disable corrections that would add qualification? | |||
1150 | CXXScopeSpec ScopeSpec; | |||
1151 | DeclFilterCCC<VarDecl> Validator{}; | |||
1152 | if (DiagnoseEmptyLookup(CurScope, ScopeSpec, R, Validator)) | |||
1153 | continue; | |||
1154 | } | |||
1155 | ||||
1156 | if (auto *BD = R.getAsSingle<BindingDecl>()) | |||
1157 | Var = BD; | |||
1158 | else | |||
1159 | Var = R.getAsSingle<VarDecl>(); | |||
1160 | if (Var && DiagnoseUseOfDecl(Var, C->Loc)) | |||
1161 | continue; | |||
1162 | } | |||
1163 | ||||
1164 | // C++11 [expr.prim.lambda]p10: | |||
1165 | // [...] each such lookup shall find a variable with automatic storage | |||
1166 | // duration declared in the reaching scope of the local lambda expression. | |||
1167 | // Note that the 'reaching scope' check happens in tryCaptureVariable(). | |||
1168 | if (!Var) { | |||
1169 | Diag(C->Loc, diag::err_capture_does_not_name_variable) << C->Id; | |||
1170 | continue; | |||
1171 | } | |||
1172 | ||||
1173 | // C++11 [expr.prim.lambda]p8: | |||
1174 | // An identifier or this shall not appear more than once in a | |||
1175 | // lambda-capture. | |||
1176 | if (auto [It, Inserted] = CaptureNames.insert(std::pair{C->Id, Var}); | |||
1177 | !Inserted) { | |||
1178 | if (C->InitKind == LambdaCaptureInitKind::NoInit && | |||
1179 | !Var->isInitCapture()) { | |||
1180 | Diag(C->Loc, diag::err_capture_more_than_once) | |||
1181 | << C->Id << It->second->getBeginLoc() | |||
1182 | << FixItHint::CreateRemoval( | |||
1183 | SourceRange(getLocForEndOfToken(PrevCaptureLoc), C->Loc)); | |||
1184 | } else | |||
1185 | // Previous capture captured something different (one or both was | |||
1186 | // an init-capture): no fixit. | |||
1187 | Diag(C->Loc, diag::err_capture_more_than_once) << C->Id; | |||
1188 | continue; | |||
1189 | } | |||
1190 | ||||
1191 | // Ignore invalid decls; they'll just confuse the code later. | |||
1192 | if (Var->isInvalidDecl()) | |||
1193 | continue; | |||
1194 | ||||
1195 | VarDecl *Underlying = Var->getPotentiallyDecomposedVarDecl(); | |||
1196 | ||||
1197 | if (!Underlying->hasLocalStorage()) { | |||
1198 | Diag(C->Loc, diag::err_capture_non_automatic_variable) << C->Id; | |||
1199 | Diag(Var->getLocation(), diag::note_previous_decl) << C->Id; | |||
1200 | continue; | |||
1201 | } | |||
1202 | ||||
1203 | // C++11 [expr.prim.lambda]p23: | |||
1204 | // A capture followed by an ellipsis is a pack expansion (14.5.3). | |||
1205 | SourceLocation EllipsisLoc; | |||
1206 | if (C->EllipsisLoc.isValid()) { | |||
1207 | if (Var->isParameterPack()) { | |||
1208 | EllipsisLoc = C->EllipsisLoc; | |||
1209 | } else { | |||
1210 | Diag(C->EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | |||
1211 | << (C->Init.isUsable() ? C->Init.get()->getSourceRange() | |||
1212 | : SourceRange(C->Loc)); | |||
1213 | ||||
1214 | // Just ignore the ellipsis. | |||
1215 | } | |||
1216 | } else if (Var->isParameterPack()) { | |||
1217 | ContainsUnexpandedParameterPack = true; | |||
1218 | } | |||
1219 | ||||
1220 | if (C->Init.isUsable()) { | |||
1221 | addInitCapture(LSI, cast<VarDecl>(Var), C->Kind == LCK_ByRef); | |||
1222 | PushOnScopeChains(Var, CurScope, false); | |||
1223 | } else { | |||
1224 | TryCaptureKind Kind = C->Kind == LCK_ByRef ? TryCapture_ExplicitByRef | |||
1225 | : TryCapture_ExplicitByVal; | |||
1226 | tryCaptureVariable(Var, C->Loc, Kind, EllipsisLoc); | |||
1227 | } | |||
1228 | if (!LSI->Captures.empty()) | |||
1229 | LSI->ExplicitCaptureRanges[LSI->Captures.size() - 1] = C->ExplicitRange; | |||
1230 | } | |||
1231 | finishLambdaExplicitCaptures(LSI); | |||
1232 | LSI->ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack; | |||
1233 | PopDeclContext(); | |||
1234 | } | |||
1235 | ||||
1236 | void Sema::ActOnLambdaClosureQualifiers(LambdaIntroducer &Intro, | |||
1237 | SourceLocation MutableLoc) { | |||
1238 | ||||
1239 | LambdaScopeInfo *LSI = getCurrentLambdaScopeUnsafe(*this); | |||
1240 | LSI->Mutable = MutableLoc.isValid(); | |||
1241 | ContextRAII Context(*this, LSI->CallOperator, /*NewThisContext*/ false); | |||
1242 | ||||
1243 | // C++11 [expr.prim.lambda]p9: | |||
1244 | // A lambda-expression whose smallest enclosing scope is a block scope is a | |||
1245 | // local lambda expression; any other lambda expression shall not have a | |||
1246 | // capture-default or simple-capture in its lambda-introducer. | |||
1247 | // | |||
1248 | // For simple-captures, this is covered by the check below that any named | |||
1249 | // entity is a variable that can be captured. | |||
1250 | // | |||
1251 | // For DR1632, we also allow a capture-default in any context where we can | |||
1252 | // odr-use 'this' (in particular, in a default initializer for a non-static | |||
1253 | // data member). | |||
1254 | if (Intro.Default != LCD_None && | |||
1255 | !LSI->Lambda->getParent()->isFunctionOrMethod() && | |||
1256 | (getCurrentThisType().isNull() || | |||
1257 | CheckCXXThisCapture(SourceLocation(), /*Explicit=*/true, | |||
1258 | /*BuildAndDiagnose=*/false))) | |||
1259 | Diag(Intro.DefaultLoc, diag::err_capture_default_non_local); | |||
1260 | } | |||
1261 | ||||
1262 | void Sema::ActOnLambdaClosureParameters( | |||
1263 | Scope *LambdaScope, MutableArrayRef<DeclaratorChunk::ParamInfo> Params) { | |||
1264 | LambdaScopeInfo *LSI = getCurrentLambdaScopeUnsafe(*this); | |||
1265 | PushDeclContext(LambdaScope, LSI->CallOperator); | |||
1266 | ||||
1267 | for (const DeclaratorChunk::ParamInfo &P : Params) { | |||
1268 | auto *Param = cast<ParmVarDecl>(P.Param); | |||
1269 | Param->setOwningFunction(LSI->CallOperator); | |||
1270 | if (Param->getIdentifier()) | |||
1271 | PushOnScopeChains(Param, LambdaScope, false); | |||
1272 | } | |||
1273 | ||||
1274 | LSI->AfterParameterList = true; | |||
1275 | } | |||
1276 | ||||
1277 | void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, | |||
1278 | Declarator &ParamInfo, | |||
1279 | const DeclSpec &DS) { | |||
1280 | ||||
1281 | LambdaScopeInfo *LSI = getCurrentLambdaScopeUnsafe(*this); | |||
1282 | LSI->CallOperator->setConstexprKind(DS.getConstexprSpecifier()); | |||
1283 | ||||
1284 | SmallVector<ParmVarDecl *, 8> Params; | |||
1285 | bool ExplicitResultType; | |||
1286 | ||||
1287 | SourceLocation TypeLoc, CallOperatorLoc; | |||
1288 | if (ParamInfo.getNumTypeObjects() == 0) { | |||
| ||||
1289 | CallOperatorLoc = TypeLoc = Intro.Range.getEnd(); | |||
1290 | } else { | |||
1291 | unsigned Index; | |||
1292 | ParamInfo.isFunctionDeclarator(Index); | |||
1293 | const auto &Object = ParamInfo.getTypeObject(Index); | |||
| ||||
1294 | TypeLoc = | |||
1295 | Object.Loc.isValid() ? Object.Loc : ParamInfo.getSourceRange().getEnd(); | |||
1296 | CallOperatorLoc = ParamInfo.getSourceRange().getEnd(); | |||
1297 | } | |||
1298 | ||||
1299 | CXXRecordDecl *Class = LSI->Lambda; | |||
1300 | CXXMethodDecl *Method = LSI->CallOperator; | |||
1301 | ||||
1302 | TypeSourceInfo *MethodTyInfo = getLambdaType( | |||
1303 | *this, Intro, ParamInfo, getCurScope(), TypeLoc, ExplicitResultType); | |||
1304 | ||||
1305 | LSI->ExplicitParams = ParamInfo.getNumTypeObjects() != 0; | |||
1306 | ||||
1307 | if (ParamInfo.isFunctionDeclarator() != 0 && | |||
1308 | !FTIHasSingleVoidParameter(ParamInfo.getFunctionTypeInfo())) { | |||
1309 | const auto &FTI = ParamInfo.getFunctionTypeInfo(); | |||
1310 | Params.reserve(Params.size()); | |||
1311 | for (unsigned I = 0; I < FTI.NumParams; ++I) { | |||
1312 | auto *Param = cast<ParmVarDecl>(FTI.Params[I].Param); | |||
1313 | Param->setScopeInfo(0, Params.size()); | |||
1314 | Params.push_back(Param); | |||
1315 | } | |||
1316 | } | |||
1317 | ||||
1318 | bool IsLambdaStatic = | |||
1319 | ParamInfo.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static; | |||
1320 | ||||
1321 | CompleteLambdaCallOperator( | |||
1322 | Method, Intro.Range.getBegin(), CallOperatorLoc, | |||
1323 | ParamInfo.getTrailingRequiresClause(), MethodTyInfo, | |||
1324 | ParamInfo.getDeclSpec().getConstexprSpecifier(), | |||
1325 | IsLambdaStatic ? SC_Static : SC_None, Params, ExplicitResultType); | |||
1326 | ||||
1327 | ContextRAII ManglingContext(*this, Class->getDeclContext()); | |||
1328 | ||||
1329 | CheckCXXDefaultArguments(Method); | |||
1330 | ||||
1331 | // This represents the function body for the lambda function, check if we | |||
1332 | // have to apply optnone due to a pragma. | |||
1333 | AddRangeBasedOptnone(Method); | |||
1334 | ||||
1335 | // code_seg attribute on lambda apply to the method. | |||
1336 | if (Attr *A = getImplicitCodeSegOrSectionAttrForFunction( | |||
1337 | Method, /*IsDefinition=*/true)) | |||
1338 | Method->addAttr(A); | |||
1339 | ||||
1340 | // Attributes on the lambda apply to the method. | |||
1341 | ProcessDeclAttributes(CurScope, Method, ParamInfo); | |||
1342 | ||||
1343 | // CUDA lambdas get implicit host and device attributes. | |||
1344 | if (getLangOpts().CUDA) | |||
1345 | CUDASetLambdaAttrs(Method); | |||
1346 | ||||
1347 | // OpenMP lambdas might get assumumption attributes. | |||
1348 | if (LangOpts.OpenMP) | |||
1349 | ActOnFinishedFunctionDefinitionInOpenMPAssumeScope(Method); | |||
1350 | ||||
1351 | handleLambdaNumbering(Class, Method); | |||
1352 | ||||
1353 | ManglingContext.pop(); | |||
1354 | ||||
1355 | for (auto &&C : LSI->Captures) { | |||
1356 | if (!C.isVariableCapture()) | |||
1357 | continue; | |||
1358 | ValueDecl *Var = C.getVariable(); | |||
1359 | if (Var && Var->isInitCapture()) { | |||
1360 | PushOnScopeChains(Var, CurScope, false); | |||
1361 | } | |||
1362 | } | |||
1363 | ||||
1364 | auto CheckRedefinition = [&](ParmVarDecl *Param) { | |||
1365 | for (const auto &Capture : Intro.Captures) { | |||
1366 | if (Capture.Id == Param->getIdentifier()) { | |||
1367 | Diag(Param->getLocation(), diag::err_parameter_shadow_capture); | |||
1368 | Diag(Capture.Loc, diag::note_var_explicitly_captured_here) | |||
1369 | << Capture.Id << true; | |||
1370 | return false; | |||
1371 | } | |||
1372 | } | |||
1373 | return true; | |||
1374 | }; | |||
1375 | ||||
1376 | for (ParmVarDecl *P : Params) { | |||
1377 | if (!P->getIdentifier()) | |||
1378 | continue; | |||
1379 | if (CheckRedefinition(P)) | |||
1380 | CheckShadow(CurScope, P); | |||
1381 | PushOnScopeChains(P, CurScope); | |||
1382 | } | |||
1383 | ||||
1384 | // Enter a new evaluation context to insulate the lambda from any | |||
1385 | // cleanups from the enclosing full-expression. | |||
1386 | PushExpressionEvaluationContext( | |||
1387 | LSI->CallOperator->isConsteval() | |||
1388 | ? ExpressionEvaluationContext::ImmediateFunctionContext | |||
1389 | : ExpressionEvaluationContext::PotentiallyEvaluated); | |||
1390 | } | |||
1391 | ||||
1392 | void Sema::ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, | |||
1393 | bool IsInstantiation) { | |||
1394 | LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(FunctionScopes.back()); | |||
1395 | ||||
1396 | // Leave the expression-evaluation context. | |||
1397 | DiscardCleanupsInEvaluationContext(); | |||
1398 | PopExpressionEvaluationContext(); | |||
1399 | ||||
1400 | // Leave the context of the lambda. | |||
1401 | if (!IsInstantiation) | |||
1402 | PopDeclContext(); | |||
1403 | ||||
1404 | // Finalize the lambda. | |||
1405 | CXXRecordDecl *Class = LSI->Lambda; | |||
1406 | Class->setInvalidDecl(); | |||
1407 | SmallVector<Decl*, 4> Fields(Class->fields()); | |||
1408 | ActOnFields(nullptr, Class->getLocation(), Class, Fields, SourceLocation(), | |||
1409 | SourceLocation(), ParsedAttributesView()); | |||
1410 | CheckCompletedCXXClass(nullptr, Class); | |||
1411 | ||||
1412 | PopFunctionScopeInfo(); | |||
1413 | } | |||
1414 | ||||
1415 | template <typename Func> | |||
1416 | static void repeatForLambdaConversionFunctionCallingConvs( | |||
1417 | Sema &S, const FunctionProtoType &CallOpProto, Func F) { | |||
1418 | CallingConv DefaultFree = S.Context.getDefaultCallingConvention( | |||
1419 | CallOpProto.isVariadic(), /*IsCXXMethod=*/false); | |||
1420 | CallingConv DefaultMember = S.Context.getDefaultCallingConvention( | |||
1421 | CallOpProto.isVariadic(), /*IsCXXMethod=*/true); | |||
1422 | CallingConv CallOpCC = CallOpProto.getCallConv(); | |||
1423 | ||||
1424 | /// Implement emitting a version of the operator for many of the calling | |||
1425 | /// conventions for MSVC, as described here: | |||
1426 | /// https://devblogs.microsoft.com/oldnewthing/20150220-00/?p=44623. | |||
1427 | /// Experimentally, we determined that cdecl, stdcall, fastcall, and | |||
1428 | /// vectorcall are generated by MSVC when it is supported by the target. | |||
1429 | /// Additionally, we are ensuring that the default-free/default-member and | |||
1430 | /// call-operator calling convention are generated as well. | |||
1431 | /// NOTE: We intentionally generate a 'thiscall' on Win32 implicitly from the | |||
1432 | /// 'member default', despite MSVC not doing so. We do this in order to ensure | |||
1433 | /// that someone who intentionally places 'thiscall' on the lambda call | |||
1434 | /// operator will still get that overload, since we don't have the a way of | |||
1435 | /// detecting the attribute by the time we get here. | |||
1436 | if (S.getLangOpts().MSVCCompat) { | |||
1437 | CallingConv Convs[] = { | |||
1438 | CC_C, CC_X86StdCall, CC_X86FastCall, CC_X86VectorCall, | |||
1439 | DefaultFree, DefaultMember, CallOpCC}; | |||
1440 | llvm::sort(Convs); | |||
1441 | llvm::iterator_range<CallingConv *> Range( | |||
1442 | std::begin(Convs), std::unique(std::begin(Convs), std::end(Convs))); | |||
1443 | const TargetInfo &TI = S.getASTContext().getTargetInfo(); | |||
1444 | ||||
1445 | for (CallingConv C : Range) { | |||
1446 | if (TI.checkCallingConvention(C) == TargetInfo::CCCR_OK) | |||
1447 | F(C); | |||
1448 | } | |||
1449 | return; | |||
1450 | } | |||
1451 | ||||
1452 | if (CallOpCC == DefaultMember && DefaultMember != DefaultFree) { | |||
1453 | F(DefaultFree); | |||
1454 | F(DefaultMember); | |||
1455 | } else { | |||
1456 | F(CallOpCC); | |||
1457 | } | |||
1458 | } | |||
1459 | ||||
1460 | // Returns the 'standard' calling convention to be used for the lambda | |||
1461 | // conversion function, that is, the 'free' function calling convention unless | |||
1462 | // it is overridden by a non-default calling convention attribute. | |||
1463 | static CallingConv | |||
1464 | getLambdaConversionFunctionCallConv(Sema &S, | |||
1465 | const FunctionProtoType *CallOpProto) { | |||
1466 | CallingConv DefaultFree = S.Context.getDefaultCallingConvention( | |||
1467 | CallOpProto->isVariadic(), /*IsCXXMethod=*/false); | |||
1468 | CallingConv DefaultMember = S.Context.getDefaultCallingConvention( | |||
1469 | CallOpProto->isVariadic(), /*IsCXXMethod=*/true); | |||
1470 | CallingConv CallOpCC = CallOpProto->getCallConv(); | |||
1471 | ||||
1472 | // If the call-operator hasn't been changed, return both the 'free' and | |||
1473 | // 'member' function calling convention. | |||
1474 | if (CallOpCC == DefaultMember && DefaultMember != DefaultFree) | |||
1475 | return DefaultFree; | |||
1476 | return CallOpCC; | |||
1477 | } | |||
1478 | ||||
1479 | QualType Sema::getLambdaConversionFunctionResultType( | |||
1480 | const FunctionProtoType *CallOpProto, CallingConv CC) { | |||
1481 | const FunctionProtoType::ExtProtoInfo CallOpExtInfo = | |||
1482 | CallOpProto->getExtProtoInfo(); | |||
1483 | FunctionProtoType::ExtProtoInfo InvokerExtInfo = CallOpExtInfo; | |||
1484 | InvokerExtInfo.ExtInfo = InvokerExtInfo.ExtInfo.withCallingConv(CC); | |||
1485 | InvokerExtInfo.TypeQuals = Qualifiers(); | |||
1486 | assert(InvokerExtInfo.RefQualifier == RQ_None &&(static_cast <bool> (InvokerExtInfo.RefQualifier == RQ_None && "Lambda's call operator should not have a reference qualifier" ) ? void (0) : __assert_fail ("InvokerExtInfo.RefQualifier == RQ_None && \"Lambda's call operator should not have a reference qualifier\"" , "clang/lib/Sema/SemaLambda.cpp", 1487, __extension__ __PRETTY_FUNCTION__ )) | |||
1487 | "Lambda's call operator should not have a reference qualifier")(static_cast <bool> (InvokerExtInfo.RefQualifier == RQ_None && "Lambda's call operator should not have a reference qualifier" ) ? void (0) : __assert_fail ("InvokerExtInfo.RefQualifier == RQ_None && \"Lambda's call operator should not have a reference qualifier\"" , "clang/lib/Sema/SemaLambda.cpp", 1487, __extension__ __PRETTY_FUNCTION__ )); | |||
1488 | return Context.getFunctionType(CallOpProto->getReturnType(), | |||
1489 | CallOpProto->getParamTypes(), InvokerExtInfo); | |||
1490 | } | |||
1491 | ||||
1492 | /// Add a lambda's conversion to function pointer, as described in | |||
1493 | /// C++11 [expr.prim.lambda]p6. | |||
1494 | static void addFunctionPointerConversion(Sema &S, SourceRange IntroducerRange, | |||
1495 | CXXRecordDecl *Class, | |||
1496 | CXXMethodDecl *CallOperator, | |||
1497 | QualType InvokerFunctionTy) { | |||
1498 | // This conversion is explicitly disabled if the lambda's function has | |||
1499 | // pass_object_size attributes on any of its parameters. | |||
1500 | auto HasPassObjectSizeAttr = [](const ParmVarDecl *P) { | |||
1501 | return P->hasAttr<PassObjectSizeAttr>(); | |||
1502 | }; | |||
1503 | if (llvm::any_of(CallOperator->parameters(), HasPassObjectSizeAttr)) | |||
1504 | return; | |||
1505 | ||||
1506 | // Add the conversion to function pointer. | |||
1507 | QualType PtrToFunctionTy = S.Context.getPointerType(InvokerFunctionTy); | |||
1508 | ||||
1509 | // Create the type of the conversion function. | |||
1510 | FunctionProtoType::ExtProtoInfo ConvExtInfo( | |||
1511 | S.Context.getDefaultCallingConvention( | |||
1512 | /*IsVariadic=*/false, /*IsCXXMethod=*/true)); | |||
1513 | // The conversion function is always const and noexcept. | |||
1514 | ConvExtInfo.TypeQuals = Qualifiers(); | |||
1515 | ConvExtInfo.TypeQuals.addConst(); | |||
1516 | ConvExtInfo.ExceptionSpec.Type = EST_BasicNoexcept; | |||
1517 | QualType ConvTy = | |||
1518 | S.Context.getFunctionType(PtrToFunctionTy, std::nullopt, ConvExtInfo); | |||
1519 | ||||
1520 | SourceLocation Loc = IntroducerRange.getBegin(); | |||
1521 | DeclarationName ConversionName | |||
1522 | = S.Context.DeclarationNames.getCXXConversionFunctionName( | |||
1523 | S.Context.getCanonicalType(PtrToFunctionTy)); | |||
1524 | // Construct a TypeSourceInfo for the conversion function, and wire | |||
1525 | // all the parameters appropriately for the FunctionProtoTypeLoc | |||
1526 | // so that everything works during transformation/instantiation of | |||
1527 | // generic lambdas. | |||
1528 | // The main reason for wiring up the parameters of the conversion | |||
1529 | // function with that of the call operator is so that constructs | |||
1530 | // like the following work: | |||
1531 | // auto L = [](auto b) { <-- 1 | |||
1532 | // return [](auto a) -> decltype(a) { <-- 2 | |||
1533 | // return a; | |||
1534 | // }; | |||
1535 | // }; | |||
1536 | // int (*fp)(int) = L(5); | |||
1537 | // Because the trailing return type can contain DeclRefExprs that refer | |||
1538 | // to the original call operator's variables, we hijack the call | |||
1539 | // operators ParmVarDecls below. | |||
1540 | TypeSourceInfo *ConvNamePtrToFunctionTSI = | |||
1541 | S.Context.getTrivialTypeSourceInfo(PtrToFunctionTy, Loc); | |||
1542 | DeclarationNameLoc ConvNameLoc = | |||
1543 | DeclarationNameLoc::makeNamedTypeLoc(ConvNamePtrToFunctionTSI); | |||
1544 | ||||
1545 | // The conversion function is a conversion to a pointer-to-function. | |||
1546 | TypeSourceInfo *ConvTSI = S.Context.getTrivialTypeSourceInfo(ConvTy, Loc); | |||
1547 | FunctionProtoTypeLoc ConvTL = | |||
1548 | ConvTSI->getTypeLoc().getAs<FunctionProtoTypeLoc>(); | |||
1549 | // Get the result of the conversion function which is a pointer-to-function. | |||
1550 | PointerTypeLoc PtrToFunctionTL = | |||
1551 | ConvTL.getReturnLoc().getAs<PointerTypeLoc>(); | |||
1552 | // Do the same for the TypeSourceInfo that is used to name the conversion | |||
1553 | // operator. | |||
1554 | PointerTypeLoc ConvNamePtrToFunctionTL = | |||
1555 | ConvNamePtrToFunctionTSI->getTypeLoc().getAs<PointerTypeLoc>(); | |||
1556 | ||||
1557 | // Get the underlying function types that the conversion function will | |||
1558 | // be converting to (should match the type of the call operator). | |||
1559 | FunctionProtoTypeLoc CallOpConvTL = | |||
1560 | PtrToFunctionTL.getPointeeLoc().getAs<FunctionProtoTypeLoc>(); | |||
1561 | FunctionProtoTypeLoc CallOpConvNameTL = | |||
1562 | ConvNamePtrToFunctionTL.getPointeeLoc().getAs<FunctionProtoTypeLoc>(); | |||
1563 | ||||
1564 | // Wire up the FunctionProtoTypeLocs with the call operator's parameters. | |||
1565 | // These parameter's are essentially used to transform the name and | |||
1566 | // the type of the conversion operator. By using the same parameters | |||
1567 | // as the call operator's we don't have to fix any back references that | |||
1568 | // the trailing return type of the call operator's uses (such as | |||
1569 | // decltype(some_type<decltype(a)>::type{} + decltype(a){}) etc.) | |||
1570 | // - we can simply use the return type of the call operator, and | |||
1571 | // everything should work. | |||
1572 | SmallVector<ParmVarDecl *, 4> InvokerParams; | |||
1573 | for (unsigned I = 0, N = CallOperator->getNumParams(); I != N; ++I) { | |||
1574 | ParmVarDecl *From = CallOperator->getParamDecl(I); | |||
1575 | ||||
1576 | InvokerParams.push_back(ParmVarDecl::Create( | |||
1577 | S.Context, | |||
1578 | // Temporarily add to the TU. This is set to the invoker below. | |||
1579 | S.Context.getTranslationUnitDecl(), From->getBeginLoc(), | |||
1580 | From->getLocation(), From->getIdentifier(), From->getType(), | |||
1581 | From->getTypeSourceInfo(), From->getStorageClass(), | |||
1582 | /*DefArg=*/nullptr)); | |||
1583 | CallOpConvTL.setParam(I, From); | |||
1584 | CallOpConvNameTL.setParam(I, From); | |||
1585 | } | |||
1586 | ||||
1587 | CXXConversionDecl *Conversion = CXXConversionDecl::Create( | |||
1588 | S.Context, Class, Loc, | |||
1589 | DeclarationNameInfo(ConversionName, Loc, ConvNameLoc), ConvTy, ConvTSI, | |||
1590 | S.getCurFPFeatures().isFPConstrained(), | |||
1591 | /*isInline=*/true, ExplicitSpecifier(), | |||
1592 | S.getLangOpts().CPlusPlus17 ? ConstexprSpecKind::Constexpr | |||
1593 | : ConstexprSpecKind::Unspecified, | |||
1594 | CallOperator->getBody()->getEndLoc()); | |||
1595 | Conversion->setAccess(AS_public); | |||
1596 | Conversion->setImplicit(true); | |||
1597 | ||||
1598 | if (Class->isGenericLambda()) { | |||
1599 | // Create a template version of the conversion operator, using the template | |||
1600 | // parameter list of the function call operator. | |||
1601 | FunctionTemplateDecl *TemplateCallOperator = | |||
1602 | CallOperator->getDescribedFunctionTemplate(); | |||
1603 | FunctionTemplateDecl *ConversionTemplate = | |||
1604 | FunctionTemplateDecl::Create(S.Context, Class, | |||
1605 | Loc, ConversionName, | |||
1606 | TemplateCallOperator->getTemplateParameters(), | |||
1607 | Conversion); | |||
1608 | ConversionTemplate->setAccess(AS_public); | |||
1609 | ConversionTemplate->setImplicit(true); | |||
1610 | Conversion->setDescribedFunctionTemplate(ConversionTemplate); | |||
1611 | Class->addDecl(ConversionTemplate); | |||
1612 | } else | |||
1613 | Class->addDecl(Conversion); | |||
1614 | ||||
1615 | // If the lambda is not static, we need to add a static member | |||
1616 | // function that will be the result of the conversion with a | |||
1617 | // certain unique ID. | |||
1618 | // When it is static we just return the static call operator instead. | |||
1619 | if (CallOperator->isInstance()) { | |||
1620 | DeclarationName InvokerName = | |||
1621 | &S.Context.Idents.get(getLambdaStaticInvokerName()); | |||
1622 | // FIXME: Instead of passing in the CallOperator->getTypeSourceInfo() | |||
1623 | // we should get a prebuilt TrivialTypeSourceInfo from Context | |||
1624 | // using FunctionTy & Loc and get its TypeLoc as a FunctionProtoTypeLoc | |||
1625 | // then rewire the parameters accordingly, by hoisting up the InvokeParams | |||
1626 | // loop below and then use its Params to set Invoke->setParams(...) below. | |||
1627 | // This would avoid the 'const' qualifier of the calloperator from | |||
1628 | // contaminating the type of the invoker, which is currently adjusted | |||
1629 | // in SemaTemplateDeduction.cpp:DeduceTemplateArguments. Fixing the | |||
1630 | // trailing return type of the invoker would require a visitor to rebuild | |||
1631 | // the trailing return type and adjusting all back DeclRefExpr's to refer | |||
1632 | // to the new static invoker parameters - not the call operator's. | |||
1633 | CXXMethodDecl *Invoke = CXXMethodDecl::Create( | |||
1634 | S.Context, Class, Loc, DeclarationNameInfo(InvokerName, Loc), | |||
1635 | InvokerFunctionTy, CallOperator->getTypeSourceInfo(), SC_Static, | |||
1636 | S.getCurFPFeatures().isFPConstrained(), | |||
1637 | /*isInline=*/true, CallOperator->getConstexprKind(), | |||
1638 | CallOperator->getBody()->getEndLoc()); | |||
1639 | for (unsigned I = 0, N = CallOperator->getNumParams(); I != N; ++I) | |||
1640 | InvokerParams[I]->setOwningFunction(Invoke); | |||
1641 | Invoke->setParams(InvokerParams); | |||
1642 | Invoke->setAccess(AS_private); | |||
1643 | Invoke->setImplicit(true); | |||
1644 | if (Class->isGenericLambda()) { | |||
1645 | FunctionTemplateDecl *TemplateCallOperator = | |||
1646 | CallOperator->getDescribedFunctionTemplate(); | |||
1647 | FunctionTemplateDecl *StaticInvokerTemplate = | |||
1648 | FunctionTemplateDecl::Create( | |||
1649 | S.Context, Class, Loc, InvokerName, | |||
1650 | TemplateCallOperator->getTemplateParameters(), Invoke); | |||
1651 | StaticInvokerTemplate->setAccess(AS_private); | |||
1652 | StaticInvokerTemplate->setImplicit(true); | |||
1653 | Invoke->setDescribedFunctionTemplate(StaticInvokerTemplate); | |||
1654 | Class->addDecl(StaticInvokerTemplate); | |||
1655 | } else | |||
1656 | Class->addDecl(Invoke); | |||
1657 | } | |||
1658 | } | |||
1659 | ||||
1660 | /// Add a lambda's conversion to function pointers, as described in | |||
1661 | /// C++11 [expr.prim.lambda]p6. Note that in most cases, this should emit only a | |||
1662 | /// single pointer conversion. In the event that the default calling convention | |||
1663 | /// for free and member functions is different, it will emit both conventions. | |||
1664 | static void addFunctionPointerConversions(Sema &S, SourceRange IntroducerRange, | |||
1665 | CXXRecordDecl *Class, | |||
1666 | CXXMethodDecl *CallOperator) { | |||
1667 | const FunctionProtoType *CallOpProto = | |||
1668 | CallOperator->getType()->castAs<FunctionProtoType>(); | |||
1669 | ||||
1670 | repeatForLambdaConversionFunctionCallingConvs( | |||
1671 | S, *CallOpProto, [&](CallingConv CC) { | |||
1672 | QualType InvokerFunctionTy = | |||
1673 | S.getLambdaConversionFunctionResultType(CallOpProto, CC); | |||
1674 | addFunctionPointerConversion(S, IntroducerRange, Class, CallOperator, | |||
1675 | InvokerFunctionTy); | |||
1676 | }); | |||
1677 | } | |||
1678 | ||||
1679 | /// Add a lambda's conversion to block pointer. | |||
1680 | static void addBlockPointerConversion(Sema &S, | |||
1681 | SourceRange IntroducerRange, | |||
1682 | CXXRecordDecl *Class, | |||
1683 | CXXMethodDecl *CallOperator) { | |||
1684 | const FunctionProtoType *CallOpProto = | |||
1685 | CallOperator->getType()->castAs<FunctionProtoType>(); | |||
1686 | QualType FunctionTy = S.getLambdaConversionFunctionResultType( | |||
1687 | CallOpProto, getLambdaConversionFunctionCallConv(S, CallOpProto)); | |||
1688 | QualType BlockPtrTy = S.Context.getBlockPointerType(FunctionTy); | |||
1689 | ||||
1690 | FunctionProtoType::ExtProtoInfo ConversionEPI( | |||
1691 | S.Context.getDefaultCallingConvention( | |||
1692 | /*IsVariadic=*/false, /*IsCXXMethod=*/true)); | |||
1693 | ConversionEPI.TypeQuals = Qualifiers(); | |||
1694 | ConversionEPI.TypeQuals.addConst(); | |||
1695 | QualType ConvTy = | |||
1696 | S.Context.getFunctionType(BlockPtrTy, std::nullopt, ConversionEPI); | |||
1697 | ||||
1698 | SourceLocation Loc = IntroducerRange.getBegin(); | |||
1699 | DeclarationName Name | |||
1700 | = S.Context.DeclarationNames.getCXXConversionFunctionName( | |||
1701 | S.Context.getCanonicalType(BlockPtrTy)); | |||
1702 | DeclarationNameLoc NameLoc = DeclarationNameLoc::makeNamedTypeLoc( | |||
1703 | S.Context.getTrivialTypeSourceInfo(BlockPtrTy, Loc)); | |||
1704 | CXXConversionDecl *Conversion = CXXConversionDecl::Create( | |||
1705 | S.Context, Class, Loc, DeclarationNameInfo(Name, Loc, NameLoc), ConvTy, | |||
1706 | S.Context.getTrivialTypeSourceInfo(ConvTy, Loc), | |||
1707 | S.getCurFPFeatures().isFPConstrained(), | |||
1708 | /*isInline=*/true, ExplicitSpecifier(), ConstexprSpecKind::Unspecified, | |||
1709 | CallOperator->getBody()->getEndLoc()); | |||
1710 | Conversion->setAccess(AS_public); | |||
1711 | Conversion->setImplicit(true); | |||
1712 | Class->addDecl(Conversion); | |||
1713 | } | |||
1714 | ||||
1715 | ExprResult Sema::BuildCaptureInit(const Capture &Cap, | |||
1716 | SourceLocation ImplicitCaptureLoc, | |||
1717 | bool IsOpenMPMapping) { | |||
1718 | // VLA captures don't have a stored initialization expression. | |||
1719 | if (Cap.isVLATypeCapture()) | |||
1720 | return ExprResult(); | |||
1721 | ||||
1722 | // An init-capture is initialized directly from its stored initializer. | |||
1723 | if (Cap.isInitCapture()) | |||
1724 | return cast<VarDecl>(Cap.getVariable())->getInit(); | |||
1725 | ||||
1726 | // For anything else, build an initialization expression. For an implicit | |||
1727 | // capture, the capture notionally happens at the capture-default, so use | |||
1728 | // that location here. | |||
1729 | SourceLocation Loc = | |||
1730 | ImplicitCaptureLoc.isValid() ? ImplicitCaptureLoc : Cap.getLocation(); | |||
1731 | ||||
1732 | // C++11 [expr.prim.lambda]p21: | |||
1733 | // When the lambda-expression is evaluated, the entities that | |||
1734 | // are captured by copy are used to direct-initialize each | |||
1735 | // corresponding non-static data member of the resulting closure | |||
1736 | // object. (For array members, the array elements are | |||
1737 | // direct-initialized in increasing subscript order.) These | |||
1738 | // initializations are performed in the (unspecified) order in | |||
1739 | // which the non-static data members are declared. | |||
1740 | ||||
1741 | // C++ [expr.prim.lambda]p12: | |||
1742 | // An entity captured by a lambda-expression is odr-used (3.2) in | |||
1743 | // the scope containing the lambda-expression. | |||
1744 | ExprResult Init; | |||
1745 | IdentifierInfo *Name = nullptr; | |||
1746 | if (Cap.isThisCapture()) { | |||
1747 | QualType ThisTy = getCurrentThisType(); | |||
1748 | Expr *This = BuildCXXThisExpr(Loc, ThisTy, ImplicitCaptureLoc.isValid()); | |||
1749 | if (Cap.isCopyCapture()) | |||
1750 | Init = CreateBuiltinUnaryOp(Loc, UO_Deref, This); | |||
1751 | else | |||
1752 | Init = This; | |||
1753 | } else { | |||
1754 | assert(Cap.isVariableCapture() && "unknown kind of capture")(static_cast <bool> (Cap.isVariableCapture() && "unknown kind of capture") ? void (0) : __assert_fail ("Cap.isVariableCapture() && \"unknown kind of capture\"" , "clang/lib/Sema/SemaLambda.cpp", 1754, __extension__ __PRETTY_FUNCTION__ )); | |||
1755 | ValueDecl *Var = Cap.getVariable(); | |||
1756 | Name = Var->getIdentifier(); | |||
1757 | Init = BuildDeclarationNameExpr( | |||
1758 | CXXScopeSpec(), DeclarationNameInfo(Var->getDeclName(), Loc), Var); | |||
1759 | } | |||
1760 | ||||
1761 | // In OpenMP, the capture kind doesn't actually describe how to capture: | |||
1762 | // variables are "mapped" onto the device in a process that does not formally | |||
1763 | // make a copy, even for a "copy capture". | |||
1764 | if (IsOpenMPMapping) | |||
1765 | return Init; | |||
1766 | ||||
1767 | if (Init.isInvalid()) | |||
1768 | return ExprError(); | |||
1769 | ||||
1770 | Expr *InitExpr = Init.get(); | |||
1771 | InitializedEntity Entity = InitializedEntity::InitializeLambdaCapture( | |||
1772 | Name, Cap.getCaptureType(), Loc); | |||
1773 | InitializationKind InitKind = | |||
1774 | InitializationKind::CreateDirect(Loc, Loc, Loc); | |||
1775 | InitializationSequence InitSeq(*this, Entity, InitKind, InitExpr); | |||
1776 | return InitSeq.Perform(*this, Entity, InitKind, InitExpr); | |||
1777 | } | |||
1778 | ||||
1779 | ExprResult Sema::ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, | |||
1780 | Scope *CurScope) { | |||
1781 | LambdaScopeInfo LSI = *cast<LambdaScopeInfo>(FunctionScopes.back()); | |||
1782 | ActOnFinishFunctionBody(LSI.CallOperator, Body); | |||
1783 | return BuildLambdaExpr(StartLoc, Body->getEndLoc(), &LSI); | |||
1784 | } | |||
1785 | ||||
1786 | static LambdaCaptureDefault | |||
1787 | mapImplicitCaptureStyle(CapturingScopeInfo::ImplicitCaptureStyle ICS) { | |||
1788 | switch (ICS) { | |||
1789 | case CapturingScopeInfo::ImpCap_None: | |||
1790 | return LCD_None; | |||
1791 | case CapturingScopeInfo::ImpCap_LambdaByval: | |||
1792 | return LCD_ByCopy; | |||
1793 | case CapturingScopeInfo::ImpCap_CapturedRegion: | |||
1794 | case CapturingScopeInfo::ImpCap_LambdaByref: | |||
1795 | return LCD_ByRef; | |||
1796 | case CapturingScopeInfo::ImpCap_Block: | |||
1797 | llvm_unreachable("block capture in lambda")::llvm::llvm_unreachable_internal("block capture in lambda", "clang/lib/Sema/SemaLambda.cpp" , 1797); | |||
1798 | } | |||
1799 | llvm_unreachable("Unknown implicit capture style")::llvm::llvm_unreachable_internal("Unknown implicit capture style" , "clang/lib/Sema/SemaLambda.cpp", 1799); | |||
1800 | } | |||
1801 | ||||
1802 | bool Sema::CaptureHasSideEffects(const Capture &From) { | |||
1803 | if (From.isInitCapture()) { | |||
1804 | Expr *Init = cast<VarDecl>(From.getVariable())->getInit(); | |||
1805 | if (Init && Init->HasSideEffects(Context)) | |||
1806 | return true; | |||
1807 | } | |||
1808 | ||||
1809 | if (!From.isCopyCapture()) | |||
1810 | return false; | |||
1811 | ||||
1812 | const QualType T = From.isThisCapture() | |||
1813 | ? getCurrentThisType()->getPointeeType() | |||
1814 | : From.getCaptureType(); | |||
1815 | ||||
1816 | if (T.isVolatileQualified()) | |||
1817 | return true; | |||
1818 | ||||
1819 | const Type *BaseT = T->getBaseElementTypeUnsafe(); | |||
1820 | if (const CXXRecordDecl *RD = BaseT->getAsCXXRecordDecl()) | |||
1821 | return !RD->isCompleteDefinition() || !RD->hasTrivialCopyConstructor() || | |||
1822 | !RD->hasTrivialDestructor(); | |||
1823 | ||||
1824 | return false; | |||
1825 | } | |||
1826 | ||||
1827 | bool Sema::DiagnoseUnusedLambdaCapture(SourceRange CaptureRange, | |||
1828 | const Capture &From) { | |||
1829 | if (CaptureHasSideEffects(From)) | |||
1830 | return false; | |||
1831 | ||||
1832 | if (From.isVLATypeCapture()) | |||
1833 | return false; | |||
1834 | ||||
1835 | auto diag = Diag(From.getLocation(), diag::warn_unused_lambda_capture); | |||
1836 | if (From.isThisCapture()) | |||
1837 | diag << "'this'"; | |||
1838 | else | |||
1839 | diag << From.getVariable(); | |||
1840 | diag << From.isNonODRUsed(); | |||
1841 | diag << FixItHint::CreateRemoval(CaptureRange); | |||
1842 | return true; | |||
1843 | } | |||
1844 | ||||
1845 | /// Create a field within the lambda class or captured statement record for the | |||
1846 | /// given capture. | |||
1847 | FieldDecl *Sema::BuildCaptureField(RecordDecl *RD, | |||
1848 | const sema::Capture &Capture) { | |||
1849 | SourceLocation Loc = Capture.getLocation(); | |||
1850 | QualType FieldType = Capture.getCaptureType(); | |||
1851 | ||||
1852 | TypeSourceInfo *TSI = nullptr; | |||
1853 | if (Capture.isVariableCapture()) { | |||
1854 | const auto *Var = dyn_cast_or_null<VarDecl>(Capture.getVariable()); | |||
1855 | if (Var && Var->isInitCapture()) | |||
1856 | TSI = Var->getTypeSourceInfo(); | |||
1857 | } | |||
1858 | ||||
1859 | // FIXME: Should we really be doing this? A null TypeSourceInfo seems more | |||
1860 | // appropriate, at least for an implicit capture. | |||
1861 | if (!TSI) | |||
1862 | TSI = Context.getTrivialTypeSourceInfo(FieldType, Loc); | |||
1863 | ||||
1864 | // Build the non-static data member. | |||
1865 | FieldDecl *Field = | |||
1866 | FieldDecl::Create(Context, RD, /*StartLoc=*/Loc, /*IdLoc=*/Loc, | |||
1867 | /*Id=*/nullptr, FieldType, TSI, /*BW=*/nullptr, | |||
1868 | /*Mutable=*/false, ICIS_NoInit); | |||
1869 | // If the variable being captured has an invalid type, mark the class as | |||
1870 | // invalid as well. | |||
1871 | if (!FieldType->isDependentType()) { | |||
1872 | if (RequireCompleteSizedType(Loc, FieldType, | |||
1873 | diag::err_field_incomplete_or_sizeless)) { | |||
1874 | RD->setInvalidDecl(); | |||
1875 | Field->setInvalidDecl(); | |||
1876 | } else { | |||
1877 | NamedDecl *Def; | |||
1878 | FieldType->isIncompleteType(&Def); | |||
1879 | if (Def && Def->isInvalidDecl()) { | |||
1880 | RD->setInvalidDecl(); | |||
1881 | Field->setInvalidDecl(); | |||
1882 | } | |||
1883 | } | |||
1884 | } | |||
1885 | Field->setImplicit(true); | |||
1886 | Field->setAccess(AS_private); | |||
1887 | RD->addDecl(Field); | |||
1888 | ||||
1889 | if (Capture.isVLATypeCapture()) | |||
1890 | Field->setCapturedVLAType(Capture.getCapturedVLAType()); | |||
1891 | ||||
1892 | return Field; | |||
1893 | } | |||
1894 | ||||
1895 | ExprResult Sema::BuildLambdaExpr(SourceLocation StartLoc, SourceLocation EndLoc, | |||
1896 | LambdaScopeInfo *LSI) { | |||
1897 | // Collect information from the lambda scope. | |||
1898 | SmallVector<LambdaCapture, 4> Captures; | |||
1899 | SmallVector<Expr *, 4> CaptureInits; | |||
1900 | SourceLocation CaptureDefaultLoc = LSI->CaptureDefaultLoc; | |||
1901 | LambdaCaptureDefault CaptureDefault = | |||
1902 | mapImplicitCaptureStyle(LSI->ImpCaptureStyle); | |||
1903 | CXXRecordDecl *Class; | |||
1904 | CXXMethodDecl *CallOperator; | |||
1905 | SourceRange IntroducerRange; | |||
1906 | bool ExplicitParams; | |||
1907 | bool ExplicitResultType; | |||
1908 | CleanupInfo LambdaCleanup; | |||
1909 | bool ContainsUnexpandedParameterPack; | |||
1910 | bool IsGenericLambda; | |||
1911 | { | |||
1912 | CallOperator = LSI->CallOperator; | |||
1913 | Class = LSI->Lambda; | |||
1914 | IntroducerRange = LSI->IntroducerRange; | |||
1915 | ExplicitParams = LSI->ExplicitParams; | |||
1916 | ExplicitResultType = !LSI->HasImplicitReturnType; | |||
1917 | LambdaCleanup = LSI->Cleanup; | |||
1918 | ContainsUnexpandedParameterPack = LSI->ContainsUnexpandedParameterPack; | |||
1919 | IsGenericLambda = Class->isGenericLambda(); | |||
1920 | ||||
1921 | CallOperator->setLexicalDeclContext(Class); | |||
1922 | Decl *TemplateOrNonTemplateCallOperatorDecl = | |||
1923 | CallOperator->getDescribedFunctionTemplate() | |||
1924 | ? CallOperator->getDescribedFunctionTemplate() | |||
1925 | : cast<Decl>(CallOperator); | |||
1926 | ||||
1927 | // FIXME: Is this really the best choice? Keeping the lexical decl context | |||
1928 | // set as CurContext seems more faithful to the source. | |||
1929 | TemplateOrNonTemplateCallOperatorDecl->setLexicalDeclContext(Class); | |||
1930 | ||||
1931 | PopExpressionEvaluationContext(); | |||
1932 | ||||
1933 | // True if the current capture has a used capture or default before it. | |||
1934 | bool CurHasPreviousCapture = CaptureDefault != LCD_None; | |||
1935 | SourceLocation PrevCaptureLoc = CurHasPreviousCapture ? | |||
1936 | CaptureDefaultLoc : IntroducerRange.getBegin(); | |||
1937 | ||||
1938 | for (unsigned I = 0, N = LSI->Captures.size(); I != N; ++I) { | |||
1939 | const Capture &From = LSI->Captures[I]; | |||
1940 | ||||
1941 | if (From.isInvalid()) | |||
1942 | return ExprError(); | |||
1943 | ||||
1944 | assert(!From.isBlockCapture() && "Cannot capture __block variables")(static_cast <bool> (!From.isBlockCapture() && "Cannot capture __block variables" ) ? void (0) : __assert_fail ("!From.isBlockCapture() && \"Cannot capture __block variables\"" , "clang/lib/Sema/SemaLambda.cpp", 1944, __extension__ __PRETTY_FUNCTION__ )); | |||
1945 | bool IsImplicit = I >= LSI->NumExplicitCaptures; | |||
1946 | SourceLocation ImplicitCaptureLoc = | |||
1947 | IsImplicit ? CaptureDefaultLoc : SourceLocation(); | |||
1948 | ||||
1949 | // Use source ranges of explicit captures for fixits where available. | |||
1950 | SourceRange CaptureRange = LSI->ExplicitCaptureRanges[I]; | |||
1951 | ||||
1952 | // Warn about unused explicit captures. | |||
1953 | bool IsCaptureUsed = true; | |||
1954 | if (!CurContext->isDependentContext() && !IsImplicit && | |||
1955 | !From.isODRUsed()) { | |||
1956 | // Initialized captures that are non-ODR used may not be eliminated. | |||
1957 | // FIXME: Where did the IsGenericLambda here come from? | |||
1958 | bool NonODRUsedInitCapture = | |||
1959 | IsGenericLambda && From.isNonODRUsed() && From.isInitCapture(); | |||
1960 | if (!NonODRUsedInitCapture) { | |||
1961 | bool IsLast = (I + 1) == LSI->NumExplicitCaptures; | |||
1962 | SourceRange FixItRange; | |||
1963 | if (CaptureRange.isValid()) { | |||
1964 | if (!CurHasPreviousCapture && !IsLast) { | |||
1965 | // If there are no captures preceding this capture, remove the | |||
1966 | // following comma. | |||
1967 | FixItRange = SourceRange(CaptureRange.getBegin(), | |||
1968 | getLocForEndOfToken(CaptureRange.getEnd())); | |||
1969 | } else { | |||
1970 | // Otherwise, remove the comma since the last used capture. | |||
1971 | FixItRange = SourceRange(getLocForEndOfToken(PrevCaptureLoc), | |||
1972 | CaptureRange.getEnd()); | |||
1973 | } | |||
1974 | } | |||
1975 | ||||
1976 | IsCaptureUsed = !DiagnoseUnusedLambdaCapture(FixItRange, From); | |||
1977 | } | |||
1978 | } | |||
1979 | ||||
1980 | if (CaptureRange.isValid()) { | |||
1981 | CurHasPreviousCapture |= IsCaptureUsed; | |||
1982 | PrevCaptureLoc = CaptureRange.getEnd(); | |||
1983 | } | |||
1984 | ||||
1985 | // Map the capture to our AST representation. | |||
1986 | LambdaCapture Capture = [&] { | |||
1987 | if (From.isThisCapture()) { | |||
1988 | // Capturing 'this' implicitly with a default of '[=]' is deprecated, | |||
1989 | // because it results in a reference capture. Don't warn prior to | |||
1990 | // C++2a; there's nothing that can be done about it before then. | |||
1991 | if (getLangOpts().CPlusPlus20 && IsImplicit && | |||
1992 | CaptureDefault == LCD_ByCopy) { | |||
1993 | Diag(From.getLocation(), diag::warn_deprecated_this_capture); | |||
1994 | Diag(CaptureDefaultLoc, diag::note_deprecated_this_capture) | |||
1995 | << FixItHint::CreateInsertion( | |||
1996 | getLocForEndOfToken(CaptureDefaultLoc), ", this"); | |||
1997 | } | |||
1998 | return LambdaCapture(From.getLocation(), IsImplicit, | |||
1999 | From.isCopyCapture() ? LCK_StarThis : LCK_This); | |||
2000 | } else if (From.isVLATypeCapture()) { | |||
2001 | return LambdaCapture(From.getLocation(), IsImplicit, LCK_VLAType); | |||
2002 | } else { | |||
2003 | assert(From.isVariableCapture() && "unknown kind of capture")(static_cast <bool> (From.isVariableCapture() && "unknown kind of capture") ? void (0) : __assert_fail ("From.isVariableCapture() && \"unknown kind of capture\"" , "clang/lib/Sema/SemaLambda.cpp", 2003, __extension__ __PRETTY_FUNCTION__ )); | |||
2004 | ValueDecl *Var = From.getVariable(); | |||
2005 | LambdaCaptureKind Kind = | |||
2006 | From.isCopyCapture() ? LCK_ByCopy : LCK_ByRef; | |||
2007 | return LambdaCapture(From.getLocation(), IsImplicit, Kind, Var, | |||
2008 | From.getEllipsisLoc()); | |||
2009 | } | |||
2010 | }(); | |||
2011 | ||||
2012 | // Form the initializer for the capture field. | |||
2013 | ExprResult Init = BuildCaptureInit(From, ImplicitCaptureLoc); | |||
2014 | ||||
2015 | // FIXME: Skip this capture if the capture is not used, the initializer | |||
2016 | // has no side-effects, the type of the capture is trivial, and the | |||
2017 | // lambda is not externally visible. | |||
2018 | ||||
2019 | // Add a FieldDecl for the capture and form its initializer. | |||
2020 | BuildCaptureField(Class, From); | |||
2021 | Captures.push_back(Capture); | |||
2022 | CaptureInits.push_back(Init.get()); | |||
2023 | ||||
2024 | if (LangOpts.CUDA) | |||
2025 | CUDACheckLambdaCapture(CallOperator, From); | |||
2026 | } | |||
2027 | ||||
2028 | Class->setCaptures(Context, Captures); | |||
2029 | ||||
2030 | // C++11 [expr.prim.lambda]p6: | |||
2031 | // The closure type for a lambda-expression with no lambda-capture | |||
2032 | // has a public non-virtual non-explicit const conversion function | |||
2033 | // to pointer to function having the same parameter and return | |||
2034 | // types as the closure type's function call operator. | |||
2035 | if (Captures.empty() && CaptureDefault == LCD_None) | |||
2036 | addFunctionPointerConversions(*this, IntroducerRange, Class, | |||
2037 | CallOperator); | |||
2038 | ||||
2039 | // Objective-C++: | |||
2040 | // The closure type for a lambda-expression has a public non-virtual | |||
2041 | // non-explicit const conversion function to a block pointer having the | |||
2042 | // same parameter and return types as the closure type's function call | |||
2043 | // operator. | |||
2044 | // FIXME: Fix generic lambda to block conversions. | |||
2045 | if (getLangOpts().Blocks && getLangOpts().ObjC && !IsGenericLambda) | |||
2046 | addBlockPointerConversion(*this, IntroducerRange, Class, CallOperator); | |||
2047 | ||||
2048 | // Finalize the lambda class. | |||
2049 | SmallVector<Decl*, 4> Fields(Class->fields()); | |||
2050 | ActOnFields(nullptr, Class->getLocation(), Class, Fields, SourceLocation(), | |||
2051 | SourceLocation(), ParsedAttributesView()); | |||
2052 | CheckCompletedCXXClass(nullptr, Class); | |||
2053 | } | |||
2054 | ||||
2055 | Cleanup.mergeFrom(LambdaCleanup); | |||
2056 | ||||
2057 | LambdaExpr *Lambda = LambdaExpr::Create(Context, Class, IntroducerRange, | |||
2058 | CaptureDefault, CaptureDefaultLoc, | |||
2059 | ExplicitParams, ExplicitResultType, | |||
2060 | CaptureInits, EndLoc, | |||
2061 | ContainsUnexpandedParameterPack); | |||
2062 | // If the lambda expression's call operator is not explicitly marked constexpr | |||
2063 | // and we are not in a dependent context, analyze the call operator to infer | |||
2064 | // its constexpr-ness, suppressing diagnostics while doing so. | |||
2065 | if (getLangOpts().CPlusPlus17 && !CallOperator->isInvalidDecl() && | |||
2066 | !CallOperator->isConstexpr() && | |||
2067 | !isa<CoroutineBodyStmt>(CallOperator->getBody()) && | |||
2068 | !Class->getDeclContext()->isDependentContext()) { | |||
2069 | CallOperator->setConstexprKind( | |||
2070 | CheckConstexprFunctionDefinition(CallOperator, | |||
2071 | CheckConstexprKind::CheckValid) | |||
2072 | ? ConstexprSpecKind::Constexpr | |||
2073 | : ConstexprSpecKind::Unspecified); | |||
2074 | } | |||
2075 | ||||
2076 | // Emit delayed shadowing warnings now that the full capture list is known. | |||
2077 | DiagnoseShadowingLambdaDecls(LSI); | |||
2078 | ||||
2079 | if (!CurContext->isDependentContext()) { | |||
2080 | switch (ExprEvalContexts.back().Context) { | |||
2081 | // C++11 [expr.prim.lambda]p2: | |||
2082 | // A lambda-expression shall not appear in an unevaluated operand | |||
2083 | // (Clause 5). | |||
2084 | case ExpressionEvaluationContext::Unevaluated: | |||
2085 | case ExpressionEvaluationContext::UnevaluatedList: | |||
2086 | case ExpressionEvaluationContext::UnevaluatedAbstract: | |||
2087 | // C++1y [expr.const]p2: | |||
2088 | // A conditional-expression e is a core constant expression unless the | |||
2089 | // evaluation of e, following the rules of the abstract machine, would | |||
2090 | // evaluate [...] a lambda-expression. | |||
2091 | // | |||
2092 | // This is technically incorrect, there are some constant evaluated contexts | |||
2093 | // where this should be allowed. We should probably fix this when DR1607 is | |||
2094 | // ratified, it lays out the exact set of conditions where we shouldn't | |||
2095 | // allow a lambda-expression. | |||
2096 | case ExpressionEvaluationContext::ConstantEvaluated: | |||
2097 | case ExpressionEvaluationContext::ImmediateFunctionContext: | |||
2098 | // We don't actually diagnose this case immediately, because we | |||
2099 | // could be within a context where we might find out later that | |||
2100 | // the expression is potentially evaluated (e.g., for typeid). | |||
2101 | ExprEvalContexts.back().Lambdas.push_back(Lambda); | |||
2102 | break; | |||
2103 | ||||
2104 | case ExpressionEvaluationContext::DiscardedStatement: | |||
2105 | case ExpressionEvaluationContext::PotentiallyEvaluated: | |||
2106 | case ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
2107 | break; | |||
2108 | } | |||
2109 | } | |||
2110 | ||||
2111 | return MaybeBindToTemporary(Lambda); | |||
2112 | } | |||
2113 | ||||
2114 | ExprResult Sema::BuildBlockForLambdaConversion(SourceLocation CurrentLocation, | |||
2115 | SourceLocation ConvLocation, | |||
2116 | CXXConversionDecl *Conv, | |||
2117 | Expr *Src) { | |||
2118 | // Make sure that the lambda call operator is marked used. | |||
2119 | CXXRecordDecl *Lambda = Conv->getParent(); | |||
2120 | CXXMethodDecl *CallOperator | |||
2121 | = cast<CXXMethodDecl>( | |||
2122 | Lambda->lookup( | |||
2123 | Context.DeclarationNames.getCXXOperatorName(OO_Call)).front()); | |||
2124 | CallOperator->setReferenced(); | |||
2125 | CallOperator->markUsed(Context); | |||
2126 | ||||
2127 | ExprResult Init = PerformCopyInitialization( | |||
2128 | InitializedEntity::InitializeLambdaToBlock(ConvLocation, Src->getType()), | |||
2129 | CurrentLocation, Src); | |||
2130 | if (!Init.isInvalid()) | |||
2131 | Init = ActOnFinishFullExpr(Init.get(), /*DiscardedValue*/ false); | |||
2132 | ||||
2133 | if (Init.isInvalid()) | |||
2134 | return ExprError(); | |||
2135 | ||||
2136 | // Create the new block to be returned. | |||
2137 | BlockDecl *Block = BlockDecl::Create(Context, CurContext, ConvLocation); | |||
2138 | ||||
2139 | // Set the type information. | |||
2140 | Block->setSignatureAsWritten(CallOperator->getTypeSourceInfo()); | |||
2141 | Block->setIsVariadic(CallOperator->isVariadic()); | |||
2142 | Block->setBlockMissingReturnType(false); | |||
2143 | ||||
2144 | // Add parameters. | |||
2145 | SmallVector<ParmVarDecl *, 4> BlockParams; | |||
2146 | for (unsigned I = 0, N = CallOperator->getNumParams(); I != N; ++I) { | |||
2147 | ParmVarDecl *From = CallOperator->getParamDecl(I); | |||
2148 | BlockParams.push_back(ParmVarDecl::Create( | |||
2149 | Context, Block, From->getBeginLoc(), From->getLocation(), | |||
2150 | From->getIdentifier(), From->getType(), From->getTypeSourceInfo(), | |||
2151 | From->getStorageClass(), | |||
2152 | /*DefArg=*/nullptr)); | |||
2153 | } | |||
2154 | Block->setParams(BlockParams); | |||
2155 | ||||
2156 | Block->setIsConversionFromLambda(true); | |||
2157 | ||||
2158 | // Add capture. The capture uses a fake variable, which doesn't correspond | |||
2159 | // to any actual memory location. However, the initializer copy-initializes | |||
2160 | // the lambda object. | |||
2161 | TypeSourceInfo *CapVarTSI = | |||
2162 | Context.getTrivialTypeSourceInfo(Src->getType()); | |||
2163 | VarDecl *CapVar = VarDecl::Create(Context, Block, ConvLocation, | |||
2164 | ConvLocation, nullptr, | |||
2165 | Src->getType(), CapVarTSI, | |||
2166 | SC_None); | |||
2167 | BlockDecl::Capture Capture(/*variable=*/CapVar, /*byRef=*/false, | |||
2168 | /*nested=*/false, /*copy=*/Init.get()); | |||
2169 | Block->setCaptures(Context, Capture, /*CapturesCXXThis=*/false); | |||
2170 | ||||
2171 | // Add a fake function body to the block. IR generation is responsible | |||
2172 | // for filling in the actual body, which cannot be expressed as an AST. | |||
2173 | Block->setBody(new (Context) CompoundStmt(ConvLocation)); | |||
2174 | ||||
2175 | // Create the block literal expression. | |||
2176 | Expr *BuildBlock = new (Context) BlockExpr(Block, Conv->getConversionType()); | |||
2177 | ExprCleanupObjects.push_back(Block); | |||
2178 | Cleanup.setExprNeedsCleanups(true); | |||
2179 | ||||
2180 | return BuildBlock; | |||
2181 | } |
1 | //===--- DeclSpec.h - Parsed declaration specifiers -------------*- 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 | /// This file defines the classes used to store parsed information about | ||||
11 | /// declaration-specifiers and declarators. | ||||
12 | /// | ||||
13 | /// \verbatim | ||||
14 | /// static const int volatile x, *y, *(*(*z)[10])(const void *x); | ||||
15 | /// ------------------------- - -- --------------------------- | ||||
16 | /// declaration-specifiers \ | / | ||||
17 | /// declarators | ||||
18 | /// \endverbatim | ||||
19 | /// | ||||
20 | //===----------------------------------------------------------------------===// | ||||
21 | |||||
22 | #ifndef LLVM_CLANG_SEMA_DECLSPEC_H | ||||
23 | #define LLVM_CLANG_SEMA_DECLSPEC_H | ||||
24 | |||||
25 | #include "clang/AST/DeclCXX.h" | ||||
26 | #include "clang/AST/DeclObjCCommon.h" | ||||
27 | #include "clang/AST/NestedNameSpecifier.h" | ||||
28 | #include "clang/Basic/ExceptionSpecificationType.h" | ||||
29 | #include "clang/Basic/Lambda.h" | ||||
30 | #include "clang/Basic/OperatorKinds.h" | ||||
31 | #include "clang/Basic/Specifiers.h" | ||||
32 | #include "clang/Lex/Token.h" | ||||
33 | #include "clang/Sema/Ownership.h" | ||||
34 | #include "clang/Sema/ParsedAttr.h" | ||||
35 | #include "llvm/ADT/STLExtras.h" | ||||
36 | #include "llvm/ADT/SmallVector.h" | ||||
37 | #include "llvm/Support/Compiler.h" | ||||
38 | #include "llvm/Support/ErrorHandling.h" | ||||
39 | |||||
40 | namespace clang { | ||||
41 | class ASTContext; | ||||
42 | class CXXRecordDecl; | ||||
43 | class TypeLoc; | ||||
44 | class LangOptions; | ||||
45 | class IdentifierInfo; | ||||
46 | class NamespaceAliasDecl; | ||||
47 | class NamespaceDecl; | ||||
48 | class ObjCDeclSpec; | ||||
49 | class Sema; | ||||
50 | class Declarator; | ||||
51 | struct TemplateIdAnnotation; | ||||
52 | |||||
53 | /// Represents a C++ nested-name-specifier or a global scope specifier. | ||||
54 | /// | ||||
55 | /// These can be in 3 states: | ||||
56 | /// 1) Not present, identified by isEmpty() | ||||
57 | /// 2) Present, identified by isNotEmpty() | ||||
58 | /// 2.a) Valid, identified by isValid() | ||||
59 | /// 2.b) Invalid, identified by isInvalid(). | ||||
60 | /// | ||||
61 | /// isSet() is deprecated because it mostly corresponded to "valid" but was | ||||
62 | /// often used as if it meant "present". | ||||
63 | /// | ||||
64 | /// The actual scope is described by getScopeRep(). | ||||
65 | /// | ||||
66 | /// If the kind of getScopeRep() is TypeSpec then TemplateParamLists may be empty | ||||
67 | /// or contain the template parameter lists attached to the current declaration. | ||||
68 | /// Consider the following example: | ||||
69 | /// template <class T> void SomeType<T>::some_method() {} | ||||
70 | /// If CXXScopeSpec refers to SomeType<T> then TemplateParamLists will contain | ||||
71 | /// a single element referring to template <class T>. | ||||
72 | |||||
73 | class CXXScopeSpec { | ||||
74 | SourceRange Range; | ||||
75 | NestedNameSpecifierLocBuilder Builder; | ||||
76 | ArrayRef<TemplateParameterList *> TemplateParamLists; | ||||
77 | |||||
78 | public: | ||||
79 | SourceRange getRange() const { return Range; } | ||||
80 | void setRange(SourceRange R) { Range = R; } | ||||
81 | void setBeginLoc(SourceLocation Loc) { Range.setBegin(Loc); } | ||||
82 | void setEndLoc(SourceLocation Loc) { Range.setEnd(Loc); } | ||||
83 | SourceLocation getBeginLoc() const { return Range.getBegin(); } | ||||
84 | SourceLocation getEndLoc() const { return Range.getEnd(); } | ||||
85 | |||||
86 | void setTemplateParamLists(ArrayRef<TemplateParameterList *> L) { | ||||
87 | TemplateParamLists = L; | ||||
88 | } | ||||
89 | ArrayRef<TemplateParameterList *> getTemplateParamLists() const { | ||||
90 | return TemplateParamLists; | ||||
91 | } | ||||
92 | |||||
93 | /// Retrieve the representation of the nested-name-specifier. | ||||
94 | NestedNameSpecifier *getScopeRep() const { | ||||
95 | return Builder.getRepresentation(); | ||||
96 | } | ||||
97 | |||||
98 | /// Extend the current nested-name-specifier by another | ||||
99 | /// nested-name-specifier component of the form 'type::'. | ||||
100 | /// | ||||
101 | /// \param Context The AST context in which this nested-name-specifier | ||||
102 | /// resides. | ||||
103 | /// | ||||
104 | /// \param TemplateKWLoc The location of the 'template' keyword, if present. | ||||
105 | /// | ||||
106 | /// \param TL The TypeLoc that describes the type preceding the '::'. | ||||
107 | /// | ||||
108 | /// \param ColonColonLoc The location of the trailing '::'. | ||||
109 | void Extend(ASTContext &Context, SourceLocation TemplateKWLoc, TypeLoc TL, | ||||
110 | SourceLocation ColonColonLoc); | ||||
111 | |||||
112 | /// Extend the current nested-name-specifier by another | ||||
113 | /// nested-name-specifier component of the form 'identifier::'. | ||||
114 | /// | ||||
115 | /// \param Context The AST context in which this nested-name-specifier | ||||
116 | /// resides. | ||||
117 | /// | ||||
118 | /// \param Identifier The identifier. | ||||
119 | /// | ||||
120 | /// \param IdentifierLoc The location of the identifier. | ||||
121 | /// | ||||
122 | /// \param ColonColonLoc The location of the trailing '::'. | ||||
123 | void Extend(ASTContext &Context, IdentifierInfo *Identifier, | ||||
124 | SourceLocation IdentifierLoc, SourceLocation ColonColonLoc); | ||||
125 | |||||
126 | /// Extend the current nested-name-specifier by another | ||||
127 | /// nested-name-specifier component of the form 'namespace::'. | ||||
128 | /// | ||||
129 | /// \param Context The AST context in which this nested-name-specifier | ||||
130 | /// resides. | ||||
131 | /// | ||||
132 | /// \param Namespace The namespace. | ||||
133 | /// | ||||
134 | /// \param NamespaceLoc The location of the namespace name. | ||||
135 | /// | ||||
136 | /// \param ColonColonLoc The location of the trailing '::'. | ||||
137 | void Extend(ASTContext &Context, NamespaceDecl *Namespace, | ||||
138 | SourceLocation NamespaceLoc, SourceLocation ColonColonLoc); | ||||
139 | |||||
140 | /// Extend the current nested-name-specifier by another | ||||
141 | /// nested-name-specifier component of the form 'namespace-alias::'. | ||||
142 | /// | ||||
143 | /// \param Context The AST context in which this nested-name-specifier | ||||
144 | /// resides. | ||||
145 | /// | ||||
146 | /// \param Alias The namespace alias. | ||||
147 | /// | ||||
148 | /// \param AliasLoc The location of the namespace alias | ||||
149 | /// name. | ||||
150 | /// | ||||
151 | /// \param ColonColonLoc The location of the trailing '::'. | ||||
152 | void Extend(ASTContext &Context, NamespaceAliasDecl *Alias, | ||||
153 | SourceLocation AliasLoc, SourceLocation ColonColonLoc); | ||||
154 | |||||
155 | /// Turn this (empty) nested-name-specifier into the global | ||||
156 | /// nested-name-specifier '::'. | ||||
157 | void MakeGlobal(ASTContext &Context, SourceLocation ColonColonLoc); | ||||
158 | |||||
159 | /// Turns this (empty) nested-name-specifier into '__super' | ||||
160 | /// nested-name-specifier. | ||||
161 | /// | ||||
162 | /// \param Context The AST context in which this nested-name-specifier | ||||
163 | /// resides. | ||||
164 | /// | ||||
165 | /// \param RD The declaration of the class in which nested-name-specifier | ||||
166 | /// appeared. | ||||
167 | /// | ||||
168 | /// \param SuperLoc The location of the '__super' keyword. | ||||
169 | /// name. | ||||
170 | /// | ||||
171 | /// \param ColonColonLoc The location of the trailing '::'. | ||||
172 | void MakeSuper(ASTContext &Context, CXXRecordDecl *RD, | ||||
173 | SourceLocation SuperLoc, SourceLocation ColonColonLoc); | ||||
174 | |||||
175 | /// Make a new nested-name-specifier from incomplete source-location | ||||
176 | /// information. | ||||
177 | /// | ||||
178 | /// FIXME: This routine should be used very, very rarely, in cases where we | ||||
179 | /// need to synthesize a nested-name-specifier. Most code should instead use | ||||
180 | /// \c Adopt() with a proper \c NestedNameSpecifierLoc. | ||||
181 | void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, | ||||
182 | SourceRange R); | ||||
183 | |||||
184 | /// Adopt an existing nested-name-specifier (with source-range | ||||
185 | /// information). | ||||
186 | void Adopt(NestedNameSpecifierLoc Other); | ||||
187 | |||||
188 | /// Retrieve a nested-name-specifier with location information, copied | ||||
189 | /// into the given AST context. | ||||
190 | /// | ||||
191 | /// \param Context The context into which this nested-name-specifier will be | ||||
192 | /// copied. | ||||
193 | NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const; | ||||
194 | |||||
195 | /// Retrieve the location of the name in the last qualifier | ||||
196 | /// in this nested name specifier. | ||||
197 | /// | ||||
198 | /// For example, the location of \c bar | ||||
199 | /// in | ||||
200 | /// \verbatim | ||||
201 | /// \::foo::bar<0>:: | ||||
202 | /// ^~~ | ||||
203 | /// \endverbatim | ||||
204 | SourceLocation getLastQualifierNameLoc() const; | ||||
205 | |||||
206 | /// No scope specifier. | ||||
207 | bool isEmpty() const { return Range.isInvalid() && getScopeRep() == nullptr; } | ||||
208 | /// A scope specifier is present, but may be valid or invalid. | ||||
209 | bool isNotEmpty() const { return !isEmpty(); } | ||||
210 | |||||
211 | /// An error occurred during parsing of the scope specifier. | ||||
212 | bool isInvalid() const { return Range.isValid() && getScopeRep() == nullptr; } | ||||
213 | /// A scope specifier is present, and it refers to a real scope. | ||||
214 | bool isValid() const { return getScopeRep() != nullptr; } | ||||
215 | |||||
216 | /// Indicate that this nested-name-specifier is invalid. | ||||
217 | void SetInvalid(SourceRange R) { | ||||
218 | assert(R.isValid() && "Must have a valid source range")(static_cast <bool> (R.isValid() && "Must have a valid source range" ) ? void (0) : __assert_fail ("R.isValid() && \"Must have a valid source range\"" , "clang/include/clang/Sema/DeclSpec.h", 218, __extension__ __PRETTY_FUNCTION__ )); | ||||
219 | if (Range.getBegin().isInvalid()) | ||||
220 | Range.setBegin(R.getBegin()); | ||||
221 | Range.setEnd(R.getEnd()); | ||||
222 | Builder.Clear(); | ||||
223 | } | ||||
224 | |||||
225 | /// Deprecated. Some call sites intend isNotEmpty() while others intend | ||||
226 | /// isValid(). | ||||
227 | bool isSet() const { return getScopeRep() != nullptr; } | ||||
228 | |||||
229 | void clear() { | ||||
230 | Range = SourceRange(); | ||||
231 | Builder.Clear(); | ||||
232 | } | ||||
233 | |||||
234 | /// Retrieve the data associated with the source-location information. | ||||
235 | char *location_data() const { return Builder.getBuffer().first; } | ||||
236 | |||||
237 | /// Retrieve the size of the data associated with source-location | ||||
238 | /// information. | ||||
239 | unsigned location_size() const { return Builder.getBuffer().second; } | ||||
240 | }; | ||||
241 | |||||
242 | /// Captures information about "declaration specifiers". | ||||
243 | /// | ||||
244 | /// "Declaration specifiers" encompasses storage-class-specifiers, | ||||
245 | /// type-specifiers, type-qualifiers, and function-specifiers. | ||||
246 | class DeclSpec { | ||||
247 | public: | ||||
248 | /// storage-class-specifier | ||||
249 | /// \note The order of these enumerators is important for diagnostics. | ||||
250 | enum SCS { | ||||
251 | SCS_unspecified = 0, | ||||
252 | SCS_typedef, | ||||
253 | SCS_extern, | ||||
254 | SCS_static, | ||||
255 | SCS_auto, | ||||
256 | SCS_register, | ||||
257 | SCS_private_extern, | ||||
258 | SCS_mutable | ||||
259 | }; | ||||
260 | |||||
261 | // Import thread storage class specifier enumeration and constants. | ||||
262 | // These can be combined with SCS_extern and SCS_static. | ||||
263 | typedef ThreadStorageClassSpecifier TSCS; | ||||
264 | static const TSCS TSCS_unspecified = clang::TSCS_unspecified; | ||||
265 | static const TSCS TSCS___thread = clang::TSCS___thread; | ||||
266 | static const TSCS TSCS_thread_local = clang::TSCS_thread_local; | ||||
267 | static const TSCS TSCS__Thread_local = clang::TSCS__Thread_local; | ||||
268 | |||||
269 | enum TSC { | ||||
270 | TSC_unspecified, | ||||
271 | TSC_imaginary, | ||||
272 | TSC_complex | ||||
273 | }; | ||||
274 | |||||
275 | // Import type specifier type enumeration and constants. | ||||
276 | typedef TypeSpecifierType TST; | ||||
277 | static const TST TST_unspecified = clang::TST_unspecified; | ||||
278 | static const TST TST_void = clang::TST_void; | ||||
279 | static const TST TST_char = clang::TST_char; | ||||
280 | static const TST TST_wchar = clang::TST_wchar; | ||||
281 | static const TST TST_char8 = clang::TST_char8; | ||||
282 | static const TST TST_char16 = clang::TST_char16; | ||||
283 | static const TST TST_char32 = clang::TST_char32; | ||||
284 | static const TST TST_int = clang::TST_int; | ||||
285 | static const TST TST_int128 = clang::TST_int128; | ||||
286 | static const TST TST_bitint = clang::TST_bitint; | ||||
287 | static const TST TST_half = clang::TST_half; | ||||
288 | static const TST TST_BFloat16 = clang::TST_BFloat16; | ||||
289 | static const TST TST_float = clang::TST_float; | ||||
290 | static const TST TST_double = clang::TST_double; | ||||
291 | static const TST TST_float16 = clang::TST_Float16; | ||||
292 | static const TST TST_accum = clang::TST_Accum; | ||||
293 | static const TST TST_fract = clang::TST_Fract; | ||||
294 | static const TST TST_float128 = clang::TST_float128; | ||||
295 | static const TST TST_ibm128 = clang::TST_ibm128; | ||||
296 | static const TST TST_bool = clang::TST_bool; | ||||
297 | static const TST TST_decimal32 = clang::TST_decimal32; | ||||
298 | static const TST TST_decimal64 = clang::TST_decimal64; | ||||
299 | static const TST TST_decimal128 = clang::TST_decimal128; | ||||
300 | static const TST TST_enum = clang::TST_enum; | ||||
301 | static const TST TST_union = clang::TST_union; | ||||
302 | static const TST TST_struct = clang::TST_struct; | ||||
303 | static const TST TST_interface = clang::TST_interface; | ||||
304 | static const TST TST_class = clang::TST_class; | ||||
305 | static const TST TST_typename = clang::TST_typename; | ||||
306 | static const TST TST_typeofType = clang::TST_typeofType; | ||||
307 | static const TST TST_typeofExpr = clang::TST_typeofExpr; | ||||
308 | static const TST TST_typeof_unqualType = clang::TST_typeof_unqualType; | ||||
309 | static const TST TST_typeof_unqualExpr = clang::TST_typeof_unqualExpr; | ||||
310 | static const TST TST_decltype = clang::TST_decltype; | ||||
311 | static const TST TST_decltype_auto = clang::TST_decltype_auto; | ||||
312 | #define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) \ | ||||
313 | static const TST TST_##Trait = clang::TST_##Trait; | ||||
314 | #include "clang/Basic/TransformTypeTraits.def" | ||||
315 | static const TST TST_auto = clang::TST_auto; | ||||
316 | static const TST TST_auto_type = clang::TST_auto_type; | ||||
317 | static const TST TST_unknown_anytype = clang::TST_unknown_anytype; | ||||
318 | static const TST TST_atomic = clang::TST_atomic; | ||||
319 | #define GENERIC_IMAGE_TYPE(ImgType, Id) \ | ||||
320 | static const TST TST_##ImgType##_t = clang::TST_##ImgType##_t; | ||||
321 | #include "clang/Basic/OpenCLImageTypes.def" | ||||
322 | static const TST TST_error = clang::TST_error; | ||||
323 | |||||
324 | // type-qualifiers | ||||
325 | enum TQ { // NOTE: These flags must be kept in sync with Qualifiers::TQ. | ||||
326 | TQ_unspecified = 0, | ||||
327 | TQ_const = 1, | ||||
328 | TQ_restrict = 2, | ||||
329 | TQ_volatile = 4, | ||||
330 | TQ_unaligned = 8, | ||||
331 | // This has no corresponding Qualifiers::TQ value, because it's not treated | ||||
332 | // as a qualifier in our type system. | ||||
333 | TQ_atomic = 16 | ||||
334 | }; | ||||
335 | |||||
336 | /// ParsedSpecifiers - Flags to query which specifiers were applied. This is | ||||
337 | /// returned by getParsedSpecifiers. | ||||
338 | enum ParsedSpecifiers { | ||||
339 | PQ_None = 0, | ||||
340 | PQ_StorageClassSpecifier = 1, | ||||
341 | PQ_TypeSpecifier = 2, | ||||
342 | PQ_TypeQualifier = 4, | ||||
343 | PQ_FunctionSpecifier = 8 | ||||
344 | // FIXME: Attributes should be included here. | ||||
345 | }; | ||||
346 | |||||
347 | enum FriendSpecified : bool { | ||||
348 | No, | ||||
349 | Yes, | ||||
350 | }; | ||||
351 | |||||
352 | private: | ||||
353 | // storage-class-specifier | ||||
354 | /*SCS*/unsigned StorageClassSpec : 3; | ||||
355 | /*TSCS*/unsigned ThreadStorageClassSpec : 2; | ||||
356 | unsigned SCS_extern_in_linkage_spec : 1; | ||||
357 | |||||
358 | // type-specifier | ||||
359 | /*TypeSpecifierWidth*/ unsigned TypeSpecWidth : 2; | ||||
360 | /*TSC*/unsigned TypeSpecComplex : 2; | ||||
361 | /*TSS*/unsigned TypeSpecSign : 2; | ||||
362 | /*TST*/unsigned TypeSpecType : 7; | ||||
363 | unsigned TypeAltiVecVector : 1; | ||||
364 | unsigned TypeAltiVecPixel : 1; | ||||
365 | unsigned TypeAltiVecBool : 1; | ||||
366 | unsigned TypeSpecOwned : 1; | ||||
367 | unsigned TypeSpecPipe : 1; | ||||
368 | unsigned TypeSpecSat : 1; | ||||
369 | unsigned ConstrainedAuto : 1; | ||||
370 | |||||
371 | // type-qualifiers | ||||
372 | unsigned TypeQualifiers : 5; // Bitwise OR of TQ. | ||||
373 | |||||
374 | // function-specifier | ||||
375 | unsigned FS_inline_specified : 1; | ||||
376 | unsigned FS_forceinline_specified: 1; | ||||
377 | unsigned FS_virtual_specified : 1; | ||||
378 | unsigned FS_noreturn_specified : 1; | ||||
379 | |||||
380 | // friend-specifier | ||||
381 | unsigned Friend_specified : 1; | ||||
382 | |||||
383 | // constexpr-specifier | ||||
384 | unsigned ConstexprSpecifier : 2; | ||||
385 | |||||
386 | union { | ||||
387 | UnionParsedType TypeRep; | ||||
388 | Decl *DeclRep; | ||||
389 | Expr *ExprRep; | ||||
390 | TemplateIdAnnotation *TemplateIdRep; | ||||
391 | }; | ||||
392 | |||||
393 | /// ExplicitSpecifier - Store information about explicit spicifer. | ||||
394 | ExplicitSpecifier FS_explicit_specifier; | ||||
395 | |||||
396 | // attributes. | ||||
397 | ParsedAttributes Attrs; | ||||
398 | |||||
399 | // Scope specifier for the type spec, if applicable. | ||||
400 | CXXScopeSpec TypeScope; | ||||
401 | |||||
402 | // SourceLocation info. These are null if the item wasn't specified or if | ||||
403 | // the setting was synthesized. | ||||
404 | SourceRange Range; | ||||
405 | |||||
406 | SourceLocation StorageClassSpecLoc, ThreadStorageClassSpecLoc; | ||||
407 | SourceRange TSWRange; | ||||
408 | SourceLocation TSCLoc, TSSLoc, TSTLoc, AltiVecLoc, TSSatLoc; | ||||
409 | /// TSTNameLoc - If TypeSpecType is any of class, enum, struct, union, | ||||
410 | /// typename, then this is the location of the named type (if present); | ||||
411 | /// otherwise, it is the same as TSTLoc. Hence, the pair TSTLoc and | ||||
412 | /// TSTNameLoc provides source range info for tag types. | ||||
413 | SourceLocation TSTNameLoc; | ||||
414 | SourceRange TypeofParensRange; | ||||
415 | SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc, | ||||
416 | TQ_unalignedLoc; | ||||
417 | SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc; | ||||
418 | SourceLocation FS_explicitCloseParenLoc; | ||||
419 | SourceLocation FS_forceinlineLoc; | ||||
420 | SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc; | ||||
421 | SourceLocation TQ_pipeLoc; | ||||
422 | |||||
423 | WrittenBuiltinSpecs writtenBS; | ||||
424 | void SaveWrittenBuiltinSpecs(); | ||||
425 | |||||
426 | ObjCDeclSpec *ObjCQualifiers; | ||||
427 | |||||
428 | static bool isTypeRep(TST T) { | ||||
429 | return T == TST_atomic || T == TST_typename || T == TST_typeofType || | ||||
430 | T == TST_typeof_unqualType || isTransformTypeTrait(T); | ||||
431 | } | ||||
432 | static bool isExprRep(TST T) { | ||||
433 | return T == TST_typeofExpr || T == TST_typeof_unqualExpr || | ||||
434 | T == TST_decltype || T == TST_bitint; | ||||
435 | } | ||||
436 | static bool isTemplateIdRep(TST T) { | ||||
437 | return (T == TST_auto || T == TST_decltype_auto); | ||||
438 | } | ||||
439 | |||||
440 | DeclSpec(const DeclSpec &) = delete; | ||||
441 | void operator=(const DeclSpec &) = delete; | ||||
442 | public: | ||||
443 | static bool isDeclRep(TST T) { | ||||
444 | return (T == TST_enum || T == TST_struct || | ||||
445 | T == TST_interface || T == TST_union || | ||||
446 | T == TST_class); | ||||
447 | } | ||||
448 | static bool isTransformTypeTrait(TST T) { | ||||
449 | constexpr std::array<TST, 16> Traits = { | ||||
450 | #define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) TST_##Trait, | ||||
451 | #include "clang/Basic/TransformTypeTraits.def" | ||||
452 | }; | ||||
453 | |||||
454 | return T >= Traits.front() && T <= Traits.back(); | ||||
455 | } | ||||
456 | |||||
457 | DeclSpec(AttributeFactory &attrFactory) | ||||
458 | : StorageClassSpec(SCS_unspecified), | ||||
459 | ThreadStorageClassSpec(TSCS_unspecified), | ||||
460 | SCS_extern_in_linkage_spec(false), | ||||
461 | TypeSpecWidth(static_cast<unsigned>(TypeSpecifierWidth::Unspecified)), | ||||
462 | TypeSpecComplex(TSC_unspecified), | ||||
463 | TypeSpecSign(static_cast<unsigned>(TypeSpecifierSign::Unspecified)), | ||||
464 | TypeSpecType(TST_unspecified), TypeAltiVecVector(false), | ||||
465 | TypeAltiVecPixel(false), TypeAltiVecBool(false), TypeSpecOwned(false), | ||||
466 | TypeSpecPipe(false), TypeSpecSat(false), ConstrainedAuto(false), | ||||
467 | TypeQualifiers(TQ_unspecified), FS_inline_specified(false), | ||||
468 | FS_forceinline_specified(false), FS_virtual_specified(false), | ||||
469 | FS_noreturn_specified(false), Friend_specified(false), | ||||
470 | ConstexprSpecifier( | ||||
471 | static_cast<unsigned>(ConstexprSpecKind::Unspecified)), | ||||
472 | Attrs(attrFactory), writtenBS(), ObjCQualifiers(nullptr) {} | ||||
473 | |||||
474 | // storage-class-specifier | ||||
475 | SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; } | ||||
476 | TSCS getThreadStorageClassSpec() const { | ||||
477 | return (TSCS)ThreadStorageClassSpec; | ||||
478 | } | ||||
479 | bool isExternInLinkageSpec() const { return SCS_extern_in_linkage_spec; } | ||||
480 | void setExternInLinkageSpec(bool Value) { | ||||
481 | SCS_extern_in_linkage_spec = Value; | ||||
482 | } | ||||
483 | |||||
484 | SourceLocation getStorageClassSpecLoc() const { return StorageClassSpecLoc; } | ||||
485 | SourceLocation getThreadStorageClassSpecLoc() const { | ||||
486 | return ThreadStorageClassSpecLoc; | ||||
487 | } | ||||
488 | |||||
489 | void ClearStorageClassSpecs() { | ||||
490 | StorageClassSpec = DeclSpec::SCS_unspecified; | ||||
491 | ThreadStorageClassSpec = DeclSpec::TSCS_unspecified; | ||||
492 | SCS_extern_in_linkage_spec = false; | ||||
493 | StorageClassSpecLoc = SourceLocation(); | ||||
494 | ThreadStorageClassSpecLoc = SourceLocation(); | ||||
495 | } | ||||
496 | |||||
497 | void ClearTypeSpecType() { | ||||
498 | TypeSpecType = DeclSpec::TST_unspecified; | ||||
499 | TypeSpecOwned = false; | ||||
500 | TSTLoc = SourceLocation(); | ||||
501 | } | ||||
502 | |||||
503 | // type-specifier | ||||
504 | TypeSpecifierWidth getTypeSpecWidth() const { | ||||
505 | return static_cast<TypeSpecifierWidth>(TypeSpecWidth); | ||||
506 | } | ||||
507 | TSC getTypeSpecComplex() const { return (TSC)TypeSpecComplex; } | ||||
508 | TypeSpecifierSign getTypeSpecSign() const { | ||||
509 | return static_cast<TypeSpecifierSign>(TypeSpecSign); | ||||
510 | } | ||||
511 | TST getTypeSpecType() const { return (TST)TypeSpecType; } | ||||
512 | bool isTypeAltiVecVector() const { return TypeAltiVecVector; } | ||||
513 | bool isTypeAltiVecPixel() const { return TypeAltiVecPixel; } | ||||
514 | bool isTypeAltiVecBool() const { return TypeAltiVecBool; } | ||||
515 | bool isTypeSpecOwned() const { return TypeSpecOwned; } | ||||
516 | bool isTypeRep() const { return isTypeRep((TST) TypeSpecType); } | ||||
517 | bool isTypeSpecPipe() const { return TypeSpecPipe; } | ||||
518 | bool isTypeSpecSat() const { return TypeSpecSat; } | ||||
519 | bool isConstrainedAuto() const { return ConstrainedAuto; } | ||||
520 | |||||
521 | ParsedType getRepAsType() const { | ||||
522 | assert(isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type")(static_cast <bool> (isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type") ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType) && \"DeclSpec does not store a type\"" , "clang/include/clang/Sema/DeclSpec.h", 522, __extension__ __PRETTY_FUNCTION__ )); | ||||
523 | return TypeRep; | ||||
524 | } | ||||
525 | Decl *getRepAsDecl() const { | ||||
526 | assert(isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl")(static_cast <bool> (isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl") ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) && \"DeclSpec does not store a decl\"" , "clang/include/clang/Sema/DeclSpec.h", 526, __extension__ __PRETTY_FUNCTION__ )); | ||||
527 | return DeclRep; | ||||
528 | } | ||||
529 | Expr *getRepAsExpr() const { | ||||
530 | assert(isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr")(static_cast <bool> (isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr") ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType) && \"DeclSpec does not store an expr\"" , "clang/include/clang/Sema/DeclSpec.h", 530, __extension__ __PRETTY_FUNCTION__ )); | ||||
531 | return ExprRep; | ||||
532 | } | ||||
533 | TemplateIdAnnotation *getRepAsTemplateId() const { | ||||
534 | assert(isTemplateIdRep((TST) TypeSpecType) &&(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "clang/include/clang/Sema/DeclSpec.h", 535, __extension__ __PRETTY_FUNCTION__ )) | ||||
535 | "DeclSpec does not store a template id")(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "clang/include/clang/Sema/DeclSpec.h", 535, __extension__ __PRETTY_FUNCTION__ )); | ||||
536 | return TemplateIdRep; | ||||
537 | } | ||||
538 | CXXScopeSpec &getTypeSpecScope() { return TypeScope; } | ||||
539 | const CXXScopeSpec &getTypeSpecScope() const { return TypeScope; } | ||||
540 | |||||
541 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } | ||||
542 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } | ||||
543 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } | ||||
544 | |||||
545 | SourceLocation getTypeSpecWidthLoc() const { return TSWRange.getBegin(); } | ||||
546 | SourceRange getTypeSpecWidthRange() const { return TSWRange; } | ||||
547 | SourceLocation getTypeSpecComplexLoc() const { return TSCLoc; } | ||||
548 | SourceLocation getTypeSpecSignLoc() const { return TSSLoc; } | ||||
549 | SourceLocation getTypeSpecTypeLoc() const { return TSTLoc; } | ||||
550 | SourceLocation getAltiVecLoc() const { return AltiVecLoc; } | ||||
551 | SourceLocation getTypeSpecSatLoc() const { return TSSatLoc; } | ||||
552 | |||||
553 | SourceLocation getTypeSpecTypeNameLoc() const { | ||||
554 | assert(isDeclRep((TST)TypeSpecType) || isTypeRep((TST)TypeSpecType) ||(static_cast <bool> (isDeclRep((TST)TypeSpecType) || isTypeRep ((TST)TypeSpecType) || isExprRep((TST)TypeSpecType)) ? void ( 0) : __assert_fail ("isDeclRep((TST)TypeSpecType) || isTypeRep((TST)TypeSpecType) || isExprRep((TST)TypeSpecType)" , "clang/include/clang/Sema/DeclSpec.h", 555, __extension__ __PRETTY_FUNCTION__ )) | ||||
555 | isExprRep((TST)TypeSpecType))(static_cast <bool> (isDeclRep((TST)TypeSpecType) || isTypeRep ((TST)TypeSpecType) || isExprRep((TST)TypeSpecType)) ? void ( 0) : __assert_fail ("isDeclRep((TST)TypeSpecType) || isTypeRep((TST)TypeSpecType) || isExprRep((TST)TypeSpecType)" , "clang/include/clang/Sema/DeclSpec.h", 555, __extension__ __PRETTY_FUNCTION__ )); | ||||
556 | return TSTNameLoc; | ||||
557 | } | ||||
558 | |||||
559 | SourceRange getTypeofParensRange() const { return TypeofParensRange; } | ||||
560 | void setTypeArgumentRange(SourceRange range) { TypeofParensRange = range; } | ||||
561 | |||||
562 | bool hasAutoTypeSpec() const { | ||||
563 | return (TypeSpecType == TST_auto || TypeSpecType == TST_auto_type || | ||||
564 | TypeSpecType == TST_decltype_auto); | ||||
565 | } | ||||
566 | |||||
567 | bool hasTagDefinition() const; | ||||
568 | |||||
569 | /// Turn a type-specifier-type into a string like "_Bool" or "union". | ||||
570 | static const char *getSpecifierName(DeclSpec::TST T, | ||||
571 | const PrintingPolicy &Policy); | ||||
572 | static const char *getSpecifierName(DeclSpec::TQ Q); | ||||
573 | static const char *getSpecifierName(TypeSpecifierSign S); | ||||
574 | static const char *getSpecifierName(DeclSpec::TSC C); | ||||
575 | static const char *getSpecifierName(TypeSpecifierWidth W); | ||||
576 | static const char *getSpecifierName(DeclSpec::SCS S); | ||||
577 | static const char *getSpecifierName(DeclSpec::TSCS S); | ||||
578 | static const char *getSpecifierName(ConstexprSpecKind C); | ||||
579 | |||||
580 | // type-qualifiers | ||||
581 | |||||
582 | /// getTypeQualifiers - Return a set of TQs. | ||||
583 | unsigned getTypeQualifiers() const { return TypeQualifiers; } | ||||
584 | SourceLocation getConstSpecLoc() const { return TQ_constLoc; } | ||||
585 | SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; } | ||||
586 | SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; } | ||||
587 | SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; } | ||||
588 | SourceLocation getUnalignedSpecLoc() const { return TQ_unalignedLoc; } | ||||
589 | SourceLocation getPipeLoc() const { return TQ_pipeLoc; } | ||||
590 | |||||
591 | /// Clear out all of the type qualifiers. | ||||
592 | void ClearTypeQualifiers() { | ||||
593 | TypeQualifiers = 0; | ||||
594 | TQ_constLoc = SourceLocation(); | ||||
595 | TQ_restrictLoc = SourceLocation(); | ||||
596 | TQ_volatileLoc = SourceLocation(); | ||||
597 | TQ_atomicLoc = SourceLocation(); | ||||
598 | TQ_unalignedLoc = SourceLocation(); | ||||
599 | TQ_pipeLoc = SourceLocation(); | ||||
600 | } | ||||
601 | |||||
602 | // function-specifier | ||||
603 | bool isInlineSpecified() const { | ||||
604 | return FS_inline_specified | FS_forceinline_specified; | ||||
605 | } | ||||
606 | SourceLocation getInlineSpecLoc() const { | ||||
607 | return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc; | ||||
608 | } | ||||
609 | |||||
610 | ExplicitSpecifier getExplicitSpecifier() const { | ||||
611 | return FS_explicit_specifier; | ||||
612 | } | ||||
613 | |||||
614 | bool isVirtualSpecified() const { return FS_virtual_specified; } | ||||
615 | SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; } | ||||
616 | |||||
617 | bool hasExplicitSpecifier() const { | ||||
618 | return FS_explicit_specifier.isSpecified(); | ||||
619 | } | ||||
620 | SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; } | ||||
621 | SourceRange getExplicitSpecRange() const { | ||||
622 | return FS_explicit_specifier.getExpr() | ||||
623 | ? SourceRange(FS_explicitLoc, FS_explicitCloseParenLoc) | ||||
624 | : SourceRange(FS_explicitLoc); | ||||
625 | } | ||||
626 | |||||
627 | bool isNoreturnSpecified() const { return FS_noreturn_specified; } | ||||
628 | SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; } | ||||
629 | |||||
630 | void ClearFunctionSpecs() { | ||||
631 | FS_inline_specified = false; | ||||
632 | FS_inlineLoc = SourceLocation(); | ||||
633 | FS_forceinline_specified = false; | ||||
634 | FS_forceinlineLoc = SourceLocation(); | ||||
635 | FS_virtual_specified = false; | ||||
636 | FS_virtualLoc = SourceLocation(); | ||||
637 | FS_explicit_specifier = ExplicitSpecifier(); | ||||
638 | FS_explicitLoc = SourceLocation(); | ||||
639 | FS_explicitCloseParenLoc = SourceLocation(); | ||||
640 | FS_noreturn_specified = false; | ||||
641 | FS_noreturnLoc = SourceLocation(); | ||||
642 | } | ||||
643 | |||||
644 | /// This method calls the passed in handler on each CVRU qual being | ||||
645 | /// set. | ||||
646 | /// Handle - a handler to be invoked. | ||||
647 | void forEachCVRUQualifier( | ||||
648 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); | ||||
649 | |||||
650 | /// This method calls the passed in handler on each qual being | ||||
651 | /// set. | ||||
652 | /// Handle - a handler to be invoked. | ||||
653 | void forEachQualifier( | ||||
654 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); | ||||
655 | |||||
656 | /// Return true if any type-specifier has been found. | ||||
657 | bool hasTypeSpecifier() const { | ||||
658 | return getTypeSpecType() != DeclSpec::TST_unspecified || | ||||
659 | getTypeSpecWidth() != TypeSpecifierWidth::Unspecified || | ||||
660 | getTypeSpecComplex() != DeclSpec::TSC_unspecified || | ||||
661 | getTypeSpecSign() != TypeSpecifierSign::Unspecified; | ||||
662 | } | ||||
663 | |||||
664 | /// Return a bitmask of which flavors of specifiers this | ||||
665 | /// DeclSpec includes. | ||||
666 | unsigned getParsedSpecifiers() const; | ||||
667 | |||||
668 | /// isEmpty - Return true if this declaration specifier is completely empty: | ||||
669 | /// no tokens were parsed in the production of it. | ||||
670 | bool isEmpty() const { | ||||
671 | return getParsedSpecifiers() == DeclSpec::PQ_None; | ||||
672 | } | ||||
673 | |||||
674 | void SetRangeStart(SourceLocation Loc) { Range.setBegin(Loc); } | ||||
675 | void SetRangeEnd(SourceLocation Loc) { Range.setEnd(Loc); } | ||||
676 | |||||
677 | /// These methods set the specified attribute of the DeclSpec and | ||||
678 | /// return false if there was no error. If an error occurs (for | ||||
679 | /// example, if we tried to set "auto" on a spec with "extern" | ||||
680 | /// already set), they return true and set PrevSpec and DiagID | ||||
681 | /// such that | ||||
682 | /// Diag(Loc, DiagID) << PrevSpec; | ||||
683 | /// will yield a useful result. | ||||
684 | /// | ||||
685 | /// TODO: use a more general approach that still allows these | ||||
686 | /// diagnostics to be ignored when desired. | ||||
687 | bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, | ||||
688 | const char *&PrevSpec, unsigned &DiagID, | ||||
689 | const PrintingPolicy &Policy); | ||||
690 | bool SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc, | ||||
691 | const char *&PrevSpec, unsigned &DiagID); | ||||
692 | bool SetTypeSpecWidth(TypeSpecifierWidth W, SourceLocation Loc, | ||||
693 | const char *&PrevSpec, unsigned &DiagID, | ||||
694 | const PrintingPolicy &Policy); | ||||
695 | bool SetTypeSpecComplex(TSC C, SourceLocation Loc, const char *&PrevSpec, | ||||
696 | unsigned &DiagID); | ||||
697 | bool SetTypeSpecSign(TypeSpecifierSign S, SourceLocation Loc, | ||||
698 | const char *&PrevSpec, unsigned &DiagID); | ||||
699 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
700 | unsigned &DiagID, const PrintingPolicy &Policy); | ||||
701 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
702 | unsigned &DiagID, ParsedType Rep, | ||||
703 | const PrintingPolicy &Policy); | ||||
704 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
705 | unsigned &DiagID, TypeResult Rep, | ||||
706 | const PrintingPolicy &Policy) { | ||||
707 | if (Rep.isInvalid()) | ||||
708 | return SetTypeSpecError(); | ||||
709 | return SetTypeSpecType(T, Loc, PrevSpec, DiagID, Rep.get(), Policy); | ||||
710 | } | ||||
711 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
712 | unsigned &DiagID, Decl *Rep, bool Owned, | ||||
713 | const PrintingPolicy &Policy); | ||||
714 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, | ||||
715 | SourceLocation TagNameLoc, const char *&PrevSpec, | ||||
716 | unsigned &DiagID, ParsedType Rep, | ||||
717 | const PrintingPolicy &Policy); | ||||
718 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, | ||||
719 | SourceLocation TagNameLoc, const char *&PrevSpec, | ||||
720 | unsigned &DiagID, Decl *Rep, bool Owned, | ||||
721 | const PrintingPolicy &Policy); | ||||
722 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
723 | unsigned &DiagID, TemplateIdAnnotation *Rep, | ||||
724 | const PrintingPolicy &Policy); | ||||
725 | |||||
726 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, | ||||
727 | unsigned &DiagID, Expr *Rep, | ||||
728 | const PrintingPolicy &policy); | ||||
729 | bool SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc, | ||||
730 | const char *&PrevSpec, unsigned &DiagID, | ||||
731 | const PrintingPolicy &Policy); | ||||
732 | bool SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc, | ||||
733 | const char *&PrevSpec, unsigned &DiagID, | ||||
734 | const PrintingPolicy &Policy); | ||||
735 | bool SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc, | ||||
736 | const char *&PrevSpec, unsigned &DiagID, | ||||
737 | const PrintingPolicy &Policy); | ||||
738 | bool SetTypePipe(bool isPipe, SourceLocation Loc, | ||||
739 | const char *&PrevSpec, unsigned &DiagID, | ||||
740 | const PrintingPolicy &Policy); | ||||
741 | bool SetBitIntType(SourceLocation KWLoc, Expr *BitWidth, | ||||
742 | const char *&PrevSpec, unsigned &DiagID, | ||||
743 | const PrintingPolicy &Policy); | ||||
744 | bool SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec, | ||||
745 | unsigned &DiagID); | ||||
746 | bool SetTypeSpecError(); | ||||
747 | void UpdateDeclRep(Decl *Rep) { | ||||
748 | assert(isDeclRep((TST) TypeSpecType))(static_cast <bool> (isDeclRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType)", "clang/include/clang/Sema/DeclSpec.h" , 748, __extension__ __PRETTY_FUNCTION__)); | ||||
749 | DeclRep = Rep; | ||||
750 | } | ||||
751 | void UpdateTypeRep(ParsedType Rep) { | ||||
752 | assert(isTypeRep((TST) TypeSpecType))(static_cast <bool> (isTypeRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType)", "clang/include/clang/Sema/DeclSpec.h" , 752, __extension__ __PRETTY_FUNCTION__)); | ||||
753 | TypeRep = Rep; | ||||
754 | } | ||||
755 | void UpdateExprRep(Expr *Rep) { | ||||
756 | assert(isExprRep((TST) TypeSpecType))(static_cast <bool> (isExprRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType)", "clang/include/clang/Sema/DeclSpec.h" , 756, __extension__ __PRETTY_FUNCTION__)); | ||||
757 | ExprRep = Rep; | ||||
758 | } | ||||
759 | |||||
760 | bool SetTypeQual(TQ T, SourceLocation Loc); | ||||
761 | |||||
762 | bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec, | ||||
763 | unsigned &DiagID, const LangOptions &Lang); | ||||
764 | |||||
765 | bool setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec, | ||||
766 | unsigned &DiagID); | ||||
767 | bool setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec, | ||||
768 | unsigned &DiagID); | ||||
769 | bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec, | ||||
770 | unsigned &DiagID); | ||||
771 | bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec, | ||||
772 | unsigned &DiagID, ExplicitSpecifier ExplicitSpec, | ||||
773 | SourceLocation CloseParenLoc); | ||||
774 | bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec, | ||||
775 | unsigned &DiagID); | ||||
776 | |||||
777 | bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec, | ||||
778 | unsigned &DiagID); | ||||
779 | bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec, | ||||
780 | unsigned &DiagID); | ||||
781 | bool SetConstexprSpec(ConstexprSpecKind ConstexprKind, SourceLocation Loc, | ||||
782 | const char *&PrevSpec, unsigned &DiagID); | ||||
783 | |||||
784 | FriendSpecified isFriendSpecified() const { | ||||
785 | return static_cast<FriendSpecified>(Friend_specified); | ||||
786 | } | ||||
787 | |||||
788 | SourceLocation getFriendSpecLoc() const { return FriendLoc; } | ||||
789 | |||||
790 | bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); } | ||||
791 | SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; } | ||||
792 | |||||
793 | ConstexprSpecKind getConstexprSpecifier() const { | ||||
794 | return ConstexprSpecKind(ConstexprSpecifier); | ||||
795 | } | ||||
796 | |||||
797 | SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; } | ||||
798 | bool hasConstexprSpecifier() const { | ||||
799 | return getConstexprSpecifier() != ConstexprSpecKind::Unspecified; | ||||
800 | } | ||||
801 | |||||
802 | void ClearConstexprSpec() { | ||||
803 | ConstexprSpecifier = static_cast<unsigned>(ConstexprSpecKind::Unspecified); | ||||
804 | ConstexprLoc = SourceLocation(); | ||||
805 | } | ||||
806 | |||||
807 | AttributePool &getAttributePool() const { | ||||
808 | return Attrs.getPool(); | ||||
809 | } | ||||
810 | |||||
811 | /// Concatenates two attribute lists. | ||||
812 | /// | ||||
813 | /// The GCC attribute syntax allows for the following: | ||||
814 | /// | ||||
815 | /// \code | ||||
816 | /// short __attribute__(( unused, deprecated )) | ||||
817 | /// int __attribute__(( may_alias, aligned(16) )) var; | ||||
818 | /// \endcode | ||||
819 | /// | ||||
820 | /// This declares 4 attributes using 2 lists. The following syntax is | ||||
821 | /// also allowed and equivalent to the previous declaration. | ||||
822 | /// | ||||
823 | /// \code | ||||
824 | /// short __attribute__((unused)) __attribute__((deprecated)) | ||||
825 | /// int __attribute__((may_alias)) __attribute__((aligned(16))) var; | ||||
826 | /// \endcode | ||||
827 | /// | ||||
828 | void addAttributes(const ParsedAttributesView &AL) { | ||||
829 | Attrs.addAll(AL.begin(), AL.end()); | ||||
830 | } | ||||
831 | |||||
832 | bool hasAttributes() const { return !Attrs.empty(); } | ||||
833 | |||||
834 | ParsedAttributes &getAttributes() { return Attrs; } | ||||
835 | const ParsedAttributes &getAttributes() const { return Attrs; } | ||||
836 | |||||
837 | void takeAttributesFrom(ParsedAttributes &attrs) { | ||||
838 | Attrs.takeAllFrom(attrs); | ||||
839 | } | ||||
840 | |||||
841 | /// Finish - This does final analysis of the declspec, issuing diagnostics for | ||||
842 | /// things like "_Imaginary" (lacking an FP type). After calling this method, | ||||
843 | /// DeclSpec is guaranteed self-consistent, even if an error occurred. | ||||
844 | void Finish(Sema &S, const PrintingPolicy &Policy); | ||||
845 | |||||
846 | const WrittenBuiltinSpecs& getWrittenBuiltinSpecs() const { | ||||
847 | return writtenBS; | ||||
848 | } | ||||
849 | |||||
850 | ObjCDeclSpec *getObjCQualifiers() const { return ObjCQualifiers; } | ||||
851 | void setObjCQualifiers(ObjCDeclSpec *quals) { ObjCQualifiers = quals; } | ||||
852 | |||||
853 | /// Checks if this DeclSpec can stand alone, without a Declarator. | ||||
854 | /// | ||||
855 | /// Only tag declspecs can stand alone. | ||||
856 | bool isMissingDeclaratorOk(); | ||||
857 | }; | ||||
858 | |||||
859 | /// Captures information about "declaration specifiers" specific to | ||||
860 | /// Objective-C. | ||||
861 | class ObjCDeclSpec { | ||||
862 | public: | ||||
863 | /// ObjCDeclQualifier - Qualifier used on types in method | ||||
864 | /// declarations. Not all combinations are sensible. Parameters | ||||
865 | /// can be one of { in, out, inout } with one of { bycopy, byref }. | ||||
866 | /// Returns can either be { oneway } or not. | ||||
867 | /// | ||||
868 | /// This should be kept in sync with Decl::ObjCDeclQualifier. | ||||
869 | enum ObjCDeclQualifier { | ||||
870 | DQ_None = 0x0, | ||||
871 | DQ_In = 0x1, | ||||
872 | DQ_Inout = 0x2, | ||||
873 | DQ_Out = 0x4, | ||||
874 | DQ_Bycopy = 0x8, | ||||
875 | DQ_Byref = 0x10, | ||||
876 | DQ_Oneway = 0x20, | ||||
877 | DQ_CSNullability = 0x40 | ||||
878 | }; | ||||
879 | |||||
880 | ObjCDeclSpec() | ||||
881 | : objcDeclQualifier(DQ_None), | ||||
882 | PropertyAttributes(ObjCPropertyAttribute::kind_noattr), Nullability(0), | ||||
883 | GetterName(nullptr), SetterName(nullptr) {} | ||||
884 | |||||
885 | ObjCDeclQualifier getObjCDeclQualifier() const { | ||||
886 | return (ObjCDeclQualifier)objcDeclQualifier; | ||||
887 | } | ||||
888 | void setObjCDeclQualifier(ObjCDeclQualifier DQVal) { | ||||
889 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier | DQVal); | ||||
890 | } | ||||
891 | void clearObjCDeclQualifier(ObjCDeclQualifier DQVal) { | ||||
892 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier & ~DQVal); | ||||
893 | } | ||||
894 | |||||
895 | ObjCPropertyAttribute::Kind getPropertyAttributes() const { | ||||
896 | return ObjCPropertyAttribute::Kind(PropertyAttributes); | ||||
897 | } | ||||
898 | void setPropertyAttributes(ObjCPropertyAttribute::Kind PRVal) { | ||||
899 | PropertyAttributes = | ||||
900 | (ObjCPropertyAttribute::Kind)(PropertyAttributes | PRVal); | ||||
901 | } | ||||
902 | |||||
903 | NullabilityKind getNullability() const { | ||||
904 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 907, __extension__ __PRETTY_FUNCTION__ )) | ||||
905 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 907, __extension__ __PRETTY_FUNCTION__ )) | ||||
906 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 907, __extension__ __PRETTY_FUNCTION__ )) | ||||
907 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 907, __extension__ __PRETTY_FUNCTION__ )); | ||||
908 | return static_cast<NullabilityKind>(Nullability); | ||||
909 | } | ||||
910 | |||||
911 | SourceLocation getNullabilityLoc() const { | ||||
912 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 915, __extension__ __PRETTY_FUNCTION__ )) | ||||
913 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 915, __extension__ __PRETTY_FUNCTION__ )) | ||||
914 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 915, __extension__ __PRETTY_FUNCTION__ )) | ||||
915 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "clang/include/clang/Sema/DeclSpec.h", 915, __extension__ __PRETTY_FUNCTION__ )); | ||||
916 | return NullabilityLoc; | ||||
917 | } | ||||
918 | |||||
919 | void setNullability(SourceLocation loc, NullabilityKind kind) { | ||||
920 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "clang/include/clang/Sema/DeclSpec.h", 923, __extension__ __PRETTY_FUNCTION__ )) | ||||
921 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "clang/include/clang/Sema/DeclSpec.h", 923, __extension__ __PRETTY_FUNCTION__ )) | ||||
922 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "clang/include/clang/Sema/DeclSpec.h", 923, __extension__ __PRETTY_FUNCTION__ )) | ||||
923 | "Set the nullability declspec or property attribute first")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "clang/include/clang/Sema/DeclSpec.h", 923, __extension__ __PRETTY_FUNCTION__ )); | ||||
924 | Nullability = static_cast<unsigned>(kind); | ||||
925 | NullabilityLoc = loc; | ||||
926 | } | ||||
927 | |||||
928 | const IdentifierInfo *getGetterName() const { return GetterName; } | ||||
929 | IdentifierInfo *getGetterName() { return GetterName; } | ||||
930 | SourceLocation getGetterNameLoc() const { return GetterNameLoc; } | ||||
931 | void setGetterName(IdentifierInfo *name, SourceLocation loc) { | ||||
932 | GetterName = name; | ||||
933 | GetterNameLoc = loc; | ||||
934 | } | ||||
935 | |||||
936 | const IdentifierInfo *getSetterName() const { return SetterName; } | ||||
937 | IdentifierInfo *getSetterName() { return SetterName; } | ||||
938 | SourceLocation getSetterNameLoc() const { return SetterNameLoc; } | ||||
939 | void setSetterName(IdentifierInfo *name, SourceLocation loc) { | ||||
940 | SetterName = name; | ||||
941 | SetterNameLoc = loc; | ||||
942 | } | ||||
943 | |||||
944 | private: | ||||
945 | // FIXME: These two are unrelated and mutually exclusive. So perhaps | ||||
946 | // we can put them in a union to reflect their mutual exclusivity | ||||
947 | // (space saving is negligible). | ||||
948 | unsigned objcDeclQualifier : 7; | ||||
949 | |||||
950 | // NOTE: VC++ treats enums as signed, avoid using ObjCPropertyAttribute::Kind | ||||
951 | unsigned PropertyAttributes : NumObjCPropertyAttrsBits; | ||||
952 | |||||
953 | unsigned Nullability : 2; | ||||
954 | |||||
955 | SourceLocation NullabilityLoc; | ||||
956 | |||||
957 | IdentifierInfo *GetterName; // getter name or NULL if no getter | ||||
958 | IdentifierInfo *SetterName; // setter name or NULL if no setter | ||||
959 | SourceLocation GetterNameLoc; // location of the getter attribute's value | ||||
960 | SourceLocation SetterNameLoc; // location of the setter attribute's value | ||||
961 | |||||
962 | }; | ||||
963 | |||||
964 | /// Describes the kind of unqualified-id parsed. | ||||
965 | enum class UnqualifiedIdKind { | ||||
966 | /// An identifier. | ||||
967 | IK_Identifier, | ||||
968 | /// An overloaded operator name, e.g., operator+. | ||||
969 | IK_OperatorFunctionId, | ||||
970 | /// A conversion function name, e.g., operator int. | ||||
971 | IK_ConversionFunctionId, | ||||
972 | /// A user-defined literal name, e.g., operator "" _i. | ||||
973 | IK_LiteralOperatorId, | ||||
974 | /// A constructor name. | ||||
975 | IK_ConstructorName, | ||||
976 | /// A constructor named via a template-id. | ||||
977 | IK_ConstructorTemplateId, | ||||
978 | /// A destructor name. | ||||
979 | IK_DestructorName, | ||||
980 | /// A template-id, e.g., f<int>. | ||||
981 | IK_TemplateId, | ||||
982 | /// An implicit 'self' parameter | ||||
983 | IK_ImplicitSelfParam, | ||||
984 | /// A deduction-guide name (a template-name) | ||||
985 | IK_DeductionGuideName | ||||
986 | }; | ||||
987 | |||||
988 | /// Represents a C++ unqualified-id that has been parsed. | ||||
989 | class UnqualifiedId { | ||||
990 | private: | ||||
991 | UnqualifiedId(const UnqualifiedId &Other) = delete; | ||||
992 | const UnqualifiedId &operator=(const UnqualifiedId &) = delete; | ||||
993 | |||||
994 | /// Describes the kind of unqualified-id parsed. | ||||
995 | UnqualifiedIdKind Kind; | ||||
996 | |||||
997 | public: | ||||
998 | struct OFI { | ||||
999 | /// The kind of overloaded operator. | ||||
1000 | OverloadedOperatorKind Operator; | ||||
1001 | |||||
1002 | /// The source locations of the individual tokens that name | ||||
1003 | /// the operator, e.g., the "new", "[", and "]" tokens in | ||||
1004 | /// operator new []. | ||||
1005 | /// | ||||
1006 | /// Different operators have different numbers of tokens in their name, | ||||
1007 | /// up to three. Any remaining source locations in this array will be | ||||
1008 | /// set to an invalid value for operators with fewer than three tokens. | ||||
1009 | SourceLocation SymbolLocations[3]; | ||||
1010 | }; | ||||
1011 | |||||
1012 | /// Anonymous union that holds extra data associated with the | ||||
1013 | /// parsed unqualified-id. | ||||
1014 | union { | ||||
1015 | /// When Kind == IK_Identifier, the parsed identifier, or when | ||||
1016 | /// Kind == IK_UserLiteralId, the identifier suffix. | ||||
1017 | IdentifierInfo *Identifier; | ||||
1018 | |||||
1019 | /// When Kind == IK_OperatorFunctionId, the overloaded operator | ||||
1020 | /// that we parsed. | ||||
1021 | struct OFI OperatorFunctionId; | ||||
1022 | |||||
1023 | /// When Kind == IK_ConversionFunctionId, the type that the | ||||
1024 | /// conversion function names. | ||||
1025 | UnionParsedType ConversionFunctionId; | ||||
1026 | |||||
1027 | /// When Kind == IK_ConstructorName, the class-name of the type | ||||
1028 | /// whose constructor is being referenced. | ||||
1029 | UnionParsedType ConstructorName; | ||||
1030 | |||||
1031 | /// When Kind == IK_DestructorName, the type referred to by the | ||||
1032 | /// class-name. | ||||
1033 | UnionParsedType DestructorName; | ||||
1034 | |||||
1035 | /// When Kind == IK_DeductionGuideName, the parsed template-name. | ||||
1036 | UnionParsedTemplateTy TemplateName; | ||||
1037 | |||||
1038 | /// When Kind == IK_TemplateId or IK_ConstructorTemplateId, | ||||
1039 | /// the template-id annotation that contains the template name and | ||||
1040 | /// template arguments. | ||||
1041 | TemplateIdAnnotation *TemplateId; | ||||
1042 | }; | ||||
1043 | |||||
1044 | /// The location of the first token that describes this unqualified-id, | ||||
1045 | /// which will be the location of the identifier, "operator" keyword, | ||||
1046 | /// tilde (for a destructor), or the template name of a template-id. | ||||
1047 | SourceLocation StartLocation; | ||||
1048 | |||||
1049 | /// The location of the last token that describes this unqualified-id. | ||||
1050 | SourceLocation EndLocation; | ||||
1051 | |||||
1052 | UnqualifiedId() | ||||
1053 | : Kind(UnqualifiedIdKind::IK_Identifier), Identifier(nullptr) {} | ||||
1054 | |||||
1055 | /// Clear out this unqualified-id, setting it to default (invalid) | ||||
1056 | /// state. | ||||
1057 | void clear() { | ||||
1058 | Kind = UnqualifiedIdKind::IK_Identifier; | ||||
1059 | Identifier = nullptr; | ||||
1060 | StartLocation = SourceLocation(); | ||||
1061 | EndLocation = SourceLocation(); | ||||
1062 | } | ||||
1063 | |||||
1064 | /// Determine whether this unqualified-id refers to a valid name. | ||||
1065 | bool isValid() const { return StartLocation.isValid(); } | ||||
1066 | |||||
1067 | /// Determine whether this unqualified-id refers to an invalid name. | ||||
1068 | bool isInvalid() const { return !isValid(); } | ||||
1069 | |||||
1070 | /// Determine what kind of name we have. | ||||
1071 | UnqualifiedIdKind getKind() const { return Kind; } | ||||
1072 | |||||
1073 | /// Specify that this unqualified-id was parsed as an identifier. | ||||
1074 | /// | ||||
1075 | /// \param Id the parsed identifier. | ||||
1076 | /// \param IdLoc the location of the parsed identifier. | ||||
1077 | void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc) { | ||||
1078 | Kind = UnqualifiedIdKind::IK_Identifier; | ||||
1079 | Identifier = const_cast<IdentifierInfo *>(Id); | ||||
1080 | StartLocation = EndLocation = IdLoc; | ||||
1081 | } | ||||
1082 | |||||
1083 | /// Specify that this unqualified-id was parsed as an | ||||
1084 | /// operator-function-id. | ||||
1085 | /// | ||||
1086 | /// \param OperatorLoc the location of the 'operator' keyword. | ||||
1087 | /// | ||||
1088 | /// \param Op the overloaded operator. | ||||
1089 | /// | ||||
1090 | /// \param SymbolLocations the locations of the individual operator symbols | ||||
1091 | /// in the operator. | ||||
1092 | void setOperatorFunctionId(SourceLocation OperatorLoc, | ||||
1093 | OverloadedOperatorKind Op, | ||||
1094 | SourceLocation SymbolLocations[3]); | ||||
1095 | |||||
1096 | /// Specify that this unqualified-id was parsed as a | ||||
1097 | /// conversion-function-id. | ||||
1098 | /// | ||||
1099 | /// \param OperatorLoc the location of the 'operator' keyword. | ||||
1100 | /// | ||||
1101 | /// \param Ty the type to which this conversion function is converting. | ||||
1102 | /// | ||||
1103 | /// \param EndLoc the location of the last token that makes up the type name. | ||||
1104 | void setConversionFunctionId(SourceLocation OperatorLoc, | ||||
1105 | ParsedType Ty, | ||||
1106 | SourceLocation EndLoc) { | ||||
1107 | Kind = UnqualifiedIdKind::IK_ConversionFunctionId; | ||||
1108 | StartLocation = OperatorLoc; | ||||
1109 | EndLocation = EndLoc; | ||||
1110 | ConversionFunctionId = Ty; | ||||
1111 | } | ||||
1112 | |||||
1113 | /// Specific that this unqualified-id was parsed as a | ||||
1114 | /// literal-operator-id. | ||||
1115 | /// | ||||
1116 | /// \param Id the parsed identifier. | ||||
1117 | /// | ||||
1118 | /// \param OpLoc the location of the 'operator' keyword. | ||||
1119 | /// | ||||
1120 | /// \param IdLoc the location of the identifier. | ||||
1121 | void setLiteralOperatorId(const IdentifierInfo *Id, SourceLocation OpLoc, | ||||
1122 | SourceLocation IdLoc) { | ||||
1123 | Kind = UnqualifiedIdKind::IK_LiteralOperatorId; | ||||
1124 | Identifier = const_cast<IdentifierInfo *>(Id); | ||||
1125 | StartLocation = OpLoc; | ||||
1126 | EndLocation = IdLoc; | ||||
1127 | } | ||||
1128 | |||||
1129 | /// Specify that this unqualified-id was parsed as a constructor name. | ||||
1130 | /// | ||||
1131 | /// \param ClassType the class type referred to by the constructor name. | ||||
1132 | /// | ||||
1133 | /// \param ClassNameLoc the location of the class name. | ||||
1134 | /// | ||||
1135 | /// \param EndLoc the location of the last token that makes up the type name. | ||||
1136 | void setConstructorName(ParsedType ClassType, | ||||
1137 | SourceLocation ClassNameLoc, | ||||
1138 | SourceLocation EndLoc) { | ||||
1139 | Kind = UnqualifiedIdKind::IK_ConstructorName; | ||||
1140 | StartLocation = ClassNameLoc; | ||||
1141 | EndLocation = EndLoc; | ||||
1142 | ConstructorName = ClassType; | ||||
1143 | } | ||||
1144 | |||||
1145 | /// Specify that this unqualified-id was parsed as a | ||||
1146 | /// template-id that names a constructor. | ||||
1147 | /// | ||||
1148 | /// \param TemplateId the template-id annotation that describes the parsed | ||||
1149 | /// template-id. This UnqualifiedId instance will take ownership of the | ||||
1150 | /// \p TemplateId and will free it on destruction. | ||||
1151 | void setConstructorTemplateId(TemplateIdAnnotation *TemplateId); | ||||
1152 | |||||
1153 | /// Specify that this unqualified-id was parsed as a destructor name. | ||||
1154 | /// | ||||
1155 | /// \param TildeLoc the location of the '~' that introduces the destructor | ||||
1156 | /// name. | ||||
1157 | /// | ||||
1158 | /// \param ClassType the name of the class referred to by the destructor name. | ||||
1159 | void setDestructorName(SourceLocation TildeLoc, | ||||
1160 | ParsedType ClassType, | ||||
1161 | SourceLocation EndLoc) { | ||||
1162 | Kind = UnqualifiedIdKind::IK_DestructorName; | ||||
1163 | StartLocation = TildeLoc; | ||||
1164 | EndLocation = EndLoc; | ||||
1165 | DestructorName = ClassType; | ||||
1166 | } | ||||
1167 | |||||
1168 | /// Specify that this unqualified-id was parsed as a template-id. | ||||
1169 | /// | ||||
1170 | /// \param TemplateId the template-id annotation that describes the parsed | ||||
1171 | /// template-id. This UnqualifiedId instance will take ownership of the | ||||
1172 | /// \p TemplateId and will free it on destruction. | ||||
1173 | void setTemplateId(TemplateIdAnnotation *TemplateId); | ||||
1174 | |||||
1175 | /// Specify that this unqualified-id was parsed as a template-name for | ||||
1176 | /// a deduction-guide. | ||||
1177 | /// | ||||
1178 | /// \param Template The parsed template-name. | ||||
1179 | /// \param TemplateLoc The location of the parsed template-name. | ||||
1180 | void setDeductionGuideName(ParsedTemplateTy Template, | ||||
1181 | SourceLocation TemplateLoc) { | ||||
1182 | Kind = UnqualifiedIdKind::IK_DeductionGuideName; | ||||
1183 | TemplateName = Template; | ||||
1184 | StartLocation = EndLocation = TemplateLoc; | ||||
1185 | } | ||||
1186 | |||||
1187 | /// Specify that this unqualified-id is an implicit 'self' | ||||
1188 | /// parameter. | ||||
1189 | /// | ||||
1190 | /// \param Id the identifier. | ||||
1191 | void setImplicitSelfParam(const IdentifierInfo *Id) { | ||||
1192 | Kind = UnqualifiedIdKind::IK_ImplicitSelfParam; | ||||
1193 | Identifier = const_cast<IdentifierInfo *>(Id); | ||||
1194 | StartLocation = EndLocation = SourceLocation(); | ||||
1195 | } | ||||
1196 | |||||
1197 | /// Return the source range that covers this unqualified-id. | ||||
1198 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { | ||||
1199 | return SourceRange(StartLocation, EndLocation); | ||||
1200 | } | ||||
1201 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return StartLocation; } | ||||
1202 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return EndLocation; } | ||||
1203 | }; | ||||
1204 | |||||
1205 | /// A set of tokens that has been cached for later parsing. | ||||
1206 | typedef SmallVector<Token, 4> CachedTokens; | ||||
1207 | |||||
1208 | /// One instance of this struct is used for each type in a | ||||
1209 | /// declarator that is parsed. | ||||
1210 | /// | ||||
1211 | /// This is intended to be a small value object. | ||||
1212 | struct DeclaratorChunk { | ||||
1213 | DeclaratorChunk() {}; | ||||
1214 | |||||
1215 | enum { | ||||
1216 | Pointer, Reference, Array, Function, BlockPointer, MemberPointer, Paren, Pipe | ||||
1217 | } Kind; | ||||
1218 | |||||
1219 | /// Loc - The place where this type was defined. | ||||
1220 | SourceLocation Loc; | ||||
1221 | /// EndLoc - If valid, the place where this chunck ends. | ||||
1222 | SourceLocation EndLoc; | ||||
1223 | |||||
1224 | SourceRange getSourceRange() const { | ||||
1225 | if (EndLoc.isInvalid()) | ||||
1226 | return SourceRange(Loc, Loc); | ||||
1227 | return SourceRange(Loc, EndLoc); | ||||
1228 | } | ||||
1229 | |||||
1230 | ParsedAttributesView AttrList; | ||||
1231 | |||||
1232 | struct PointerTypeInfo { | ||||
1233 | /// The type qualifiers: const/volatile/restrict/unaligned/atomic. | ||||
1234 | unsigned TypeQuals : 5; | ||||
1235 | |||||
1236 | /// The location of the const-qualifier, if any. | ||||
1237 | SourceLocation ConstQualLoc; | ||||
1238 | |||||
1239 | /// The location of the volatile-qualifier, if any. | ||||
1240 | SourceLocation VolatileQualLoc; | ||||
1241 | |||||
1242 | /// The location of the restrict-qualifier, if any. | ||||
1243 | SourceLocation RestrictQualLoc; | ||||
1244 | |||||
1245 | /// The location of the _Atomic-qualifier, if any. | ||||
1246 | SourceLocation AtomicQualLoc; | ||||
1247 | |||||
1248 | /// The location of the __unaligned-qualifier, if any. | ||||
1249 | SourceLocation UnalignedQualLoc; | ||||
1250 | |||||
1251 | void destroy() { | ||||
1252 | } | ||||
1253 | }; | ||||
1254 | |||||
1255 | struct ReferenceTypeInfo { | ||||
1256 | /// The type qualifier: restrict. [GNU] C++ extension | ||||
1257 | bool HasRestrict : 1; | ||||
1258 | /// True if this is an lvalue reference, false if it's an rvalue reference. | ||||
1259 | bool LValueRef : 1; | ||||
1260 | void destroy() { | ||||
1261 | } | ||||
1262 | }; | ||||
1263 | |||||
1264 | struct ArrayTypeInfo { | ||||
1265 | /// The type qualifiers for the array: | ||||
1266 | /// const/volatile/restrict/__unaligned/_Atomic. | ||||
1267 | unsigned TypeQuals : 5; | ||||
1268 | |||||
1269 | /// True if this dimension included the 'static' keyword. | ||||
1270 | unsigned hasStatic : 1; | ||||
1271 | |||||
1272 | /// True if this dimension was [*]. In this case, NumElts is null. | ||||
1273 | unsigned isStar : 1; | ||||
1274 | |||||
1275 | /// This is the size of the array, or null if [] or [*] was specified. | ||||
1276 | /// Since the parser is multi-purpose, and we don't want to impose a root | ||||
1277 | /// expression class on all clients, NumElts is untyped. | ||||
1278 | Expr *NumElts; | ||||
1279 | |||||
1280 | void destroy() {} | ||||
1281 | }; | ||||
1282 | |||||
1283 | /// ParamInfo - An array of paraminfo objects is allocated whenever a function | ||||
1284 | /// declarator is parsed. There are two interesting styles of parameters | ||||
1285 | /// here: | ||||
1286 | /// K&R-style identifier lists and parameter type lists. K&R-style identifier | ||||
1287 | /// lists will have information about the identifier, but no type information. | ||||
1288 | /// Parameter type lists will have type info (if the actions module provides | ||||
1289 | /// it), but may have null identifier info: e.g. for 'void foo(int X, int)'. | ||||
1290 | struct ParamInfo { | ||||
1291 | IdentifierInfo *Ident; | ||||
1292 | SourceLocation IdentLoc; | ||||
1293 | Decl *Param; | ||||
1294 | |||||
1295 | /// DefaultArgTokens - When the parameter's default argument | ||||
1296 | /// cannot be parsed immediately (because it occurs within the | ||||
1297 | /// declaration of a member function), it will be stored here as a | ||||
1298 | /// sequence of tokens to be parsed once the class definition is | ||||
1299 | /// complete. Non-NULL indicates that there is a default argument. | ||||
1300 | std::unique_ptr<CachedTokens> DefaultArgTokens; | ||||
1301 | |||||
1302 | ParamInfo() = default; | ||||
1303 | ParamInfo(IdentifierInfo *ident, SourceLocation iloc, | ||||
1304 | Decl *param, | ||||
1305 | std::unique_ptr<CachedTokens> DefArgTokens = nullptr) | ||||
1306 | : Ident(ident), IdentLoc(iloc), Param(param), | ||||
1307 | DefaultArgTokens(std::move(DefArgTokens)) {} | ||||
1308 | }; | ||||
1309 | |||||
1310 | struct TypeAndRange { | ||||
1311 | ParsedType Ty; | ||||
1312 | SourceRange Range; | ||||
1313 | }; | ||||
1314 | |||||
1315 | struct FunctionTypeInfo { | ||||
1316 | /// hasPrototype - This is true if the function had at least one typed | ||||
1317 | /// parameter. If the function is () or (a,b,c), then it has no prototype, | ||||
1318 | /// and is treated as a K&R-style function. | ||||
1319 | unsigned hasPrototype : 1; | ||||
1320 | |||||
1321 | /// isVariadic - If this function has a prototype, and if that | ||||
1322 | /// proto ends with ',...)', this is true. When true, EllipsisLoc | ||||
1323 | /// contains the location of the ellipsis. | ||||
1324 | unsigned isVariadic : 1; | ||||
1325 | |||||
1326 | /// Can this declaration be a constructor-style initializer? | ||||
1327 | unsigned isAmbiguous : 1; | ||||
1328 | |||||
1329 | /// Whether the ref-qualifier (if any) is an lvalue reference. | ||||
1330 | /// Otherwise, it's an rvalue reference. | ||||
1331 | unsigned RefQualifierIsLValueRef : 1; | ||||
1332 | |||||
1333 | /// ExceptionSpecType - An ExceptionSpecificationType value. | ||||
1334 | unsigned ExceptionSpecType : 4; | ||||
1335 | |||||
1336 | /// DeleteParams - If this is true, we need to delete[] Params. | ||||
1337 | unsigned DeleteParams : 1; | ||||
1338 | |||||
1339 | /// HasTrailingReturnType - If this is true, a trailing return type was | ||||
1340 | /// specified. | ||||
1341 | unsigned HasTrailingReturnType : 1; | ||||
1342 | |||||
1343 | /// The location of the left parenthesis in the source. | ||||
1344 | SourceLocation LParenLoc; | ||||
1345 | |||||
1346 | /// When isVariadic is true, the location of the ellipsis in the source. | ||||
1347 | SourceLocation EllipsisLoc; | ||||
1348 | |||||
1349 | /// The location of the right parenthesis in the source. | ||||
1350 | SourceLocation RParenLoc; | ||||
1351 | |||||
1352 | /// NumParams - This is the number of formal parameters specified by the | ||||
1353 | /// declarator. | ||||
1354 | unsigned NumParams; | ||||
1355 | |||||
1356 | /// NumExceptionsOrDecls - This is the number of types in the | ||||
1357 | /// dynamic-exception-decl, if the function has one. In C, this is the | ||||
1358 | /// number of declarations in the function prototype. | ||||
1359 | unsigned NumExceptionsOrDecls; | ||||
1360 | |||||
1361 | /// The location of the ref-qualifier, if any. | ||||
1362 | /// | ||||
1363 | /// If this is an invalid location, there is no ref-qualifier. | ||||
1364 | SourceLocation RefQualifierLoc; | ||||
1365 | |||||
1366 | /// The location of the 'mutable' qualifer in a lambda-declarator, if | ||||
1367 | /// any. | ||||
1368 | SourceLocation MutableLoc; | ||||
1369 | |||||
1370 | /// The beginning location of the exception specification, if any. | ||||
1371 | SourceLocation ExceptionSpecLocBeg; | ||||
1372 | |||||
1373 | /// The end location of the exception specification, if any. | ||||
1374 | SourceLocation ExceptionSpecLocEnd; | ||||
1375 | |||||
1376 | /// Params - This is a pointer to a new[]'d array of ParamInfo objects that | ||||
1377 | /// describe the parameters specified by this function declarator. null if | ||||
1378 | /// there are no parameters specified. | ||||
1379 | ParamInfo *Params; | ||||
1380 | |||||
1381 | /// DeclSpec for the function with the qualifier related info. | ||||
1382 | DeclSpec *MethodQualifiers; | ||||
1383 | |||||
1384 | /// AttributeFactory for the MethodQualifiers. | ||||
1385 | AttributeFactory *QualAttrFactory; | ||||
1386 | |||||
1387 | union { | ||||
1388 | /// Pointer to a new[]'d array of TypeAndRange objects that | ||||
1389 | /// contain the types in the function's dynamic exception specification | ||||
1390 | /// and their locations, if there is one. | ||||
1391 | TypeAndRange *Exceptions; | ||||
1392 | |||||
1393 | /// Pointer to the expression in the noexcept-specifier of this | ||||
1394 | /// function, if it has one. | ||||
1395 | Expr *NoexceptExpr; | ||||
1396 | |||||
1397 | /// Pointer to the cached tokens for an exception-specification | ||||
1398 | /// that has not yet been parsed. | ||||
1399 | CachedTokens *ExceptionSpecTokens; | ||||
1400 | |||||
1401 | /// Pointer to a new[]'d array of declarations that need to be available | ||||
1402 | /// for lookup inside the function body, if one exists. Does not exist in | ||||
1403 | /// C++. | ||||
1404 | NamedDecl **DeclsInPrototype; | ||||
1405 | }; | ||||
1406 | |||||
1407 | /// If HasTrailingReturnType is true, this is the trailing return | ||||
1408 | /// type specified. | ||||
1409 | UnionParsedType TrailingReturnType; | ||||
1410 | |||||
1411 | /// If HasTrailingReturnType is true, this is the location of the trailing | ||||
1412 | /// return type. | ||||
1413 | SourceLocation TrailingReturnTypeLoc; | ||||
1414 | |||||
1415 | /// Reset the parameter list to having zero parameters. | ||||
1416 | /// | ||||
1417 | /// This is used in various places for error recovery. | ||||
1418 | void freeParams() { | ||||
1419 | for (unsigned I = 0; I < NumParams; ++I) | ||||
1420 | Params[I].DefaultArgTokens.reset(); | ||||
1421 | if (DeleteParams) { | ||||
1422 | delete[] Params; | ||||
1423 | DeleteParams = false; | ||||
1424 | } | ||||
1425 | NumParams = 0; | ||||
1426 | } | ||||
1427 | |||||
1428 | void destroy() { | ||||
1429 | freeParams(); | ||||
1430 | delete QualAttrFactory; | ||||
1431 | delete MethodQualifiers; | ||||
1432 | switch (getExceptionSpecType()) { | ||||
1433 | default: | ||||
1434 | break; | ||||
1435 | case EST_Dynamic: | ||||
1436 | delete[] Exceptions; | ||||
1437 | break; | ||||
1438 | case EST_Unparsed: | ||||
1439 | delete ExceptionSpecTokens; | ||||
1440 | break; | ||||
1441 | case EST_None: | ||||
1442 | if (NumExceptionsOrDecls != 0) | ||||
1443 | delete[] DeclsInPrototype; | ||||
1444 | break; | ||||
1445 | } | ||||
1446 | } | ||||
1447 | |||||
1448 | DeclSpec &getOrCreateMethodQualifiers() { | ||||
1449 | if (!MethodQualifiers) { | ||||
1450 | QualAttrFactory = new AttributeFactory(); | ||||
1451 | MethodQualifiers = new DeclSpec(*QualAttrFactory); | ||||
1452 | } | ||||
1453 | return *MethodQualifiers; | ||||
1454 | } | ||||
1455 | |||||
1456 | /// isKNRPrototype - Return true if this is a K&R style identifier list, | ||||
1457 | /// like "void foo(a,b,c)". In a function definition, this will be followed | ||||
1458 | /// by the parameter type definitions. | ||||
1459 | bool isKNRPrototype() const { return !hasPrototype && NumParams != 0; } | ||||
1460 | |||||
1461 | SourceLocation getLParenLoc() const { return LParenLoc; } | ||||
1462 | |||||
1463 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } | ||||
1464 | |||||
1465 | SourceLocation getRParenLoc() const { return RParenLoc; } | ||||
1466 | |||||
1467 | SourceLocation getExceptionSpecLocBeg() const { | ||||
1468 | return ExceptionSpecLocBeg; | ||||
1469 | } | ||||
1470 | |||||
1471 | SourceLocation getExceptionSpecLocEnd() const { | ||||
1472 | return ExceptionSpecLocEnd; | ||||
1473 | } | ||||
1474 | |||||
1475 | SourceRange getExceptionSpecRange() const { | ||||
1476 | return SourceRange(getExceptionSpecLocBeg(), getExceptionSpecLocEnd()); | ||||
1477 | } | ||||
1478 | |||||
1479 | /// Retrieve the location of the ref-qualifier, if any. | ||||
1480 | SourceLocation getRefQualifierLoc() const { return RefQualifierLoc; } | ||||
1481 | |||||
1482 | /// Retrieve the location of the 'const' qualifier. | ||||
1483 | SourceLocation getConstQualifierLoc() const { | ||||
1484 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "clang/include/clang/Sema/DeclSpec.h", 1484 , __extension__ __PRETTY_FUNCTION__)); | ||||
1485 | return MethodQualifiers->getConstSpecLoc(); | ||||
1486 | } | ||||
1487 | |||||
1488 | /// Retrieve the location of the 'volatile' qualifier. | ||||
1489 | SourceLocation getVolatileQualifierLoc() const { | ||||
1490 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "clang/include/clang/Sema/DeclSpec.h", 1490 , __extension__ __PRETTY_FUNCTION__)); | ||||
1491 | return MethodQualifiers->getVolatileSpecLoc(); | ||||
1492 | } | ||||
1493 | |||||
1494 | /// Retrieve the location of the 'restrict' qualifier. | ||||
1495 | SourceLocation getRestrictQualifierLoc() const { | ||||
1496 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "clang/include/clang/Sema/DeclSpec.h", 1496 , __extension__ __PRETTY_FUNCTION__)); | ||||
1497 | return MethodQualifiers->getRestrictSpecLoc(); | ||||
1498 | } | ||||
1499 | |||||
1500 | /// Retrieve the location of the 'mutable' qualifier, if any. | ||||
1501 | SourceLocation getMutableLoc() const { return MutableLoc; } | ||||
1502 | |||||
1503 | /// Determine whether this function declaration contains a | ||||
1504 | /// ref-qualifier. | ||||
1505 | bool hasRefQualifier() const { return getRefQualifierLoc().isValid(); } | ||||
1506 | |||||
1507 | /// Determine whether this lambda-declarator contains a 'mutable' | ||||
1508 | /// qualifier. | ||||
1509 | bool hasMutableQualifier() const { return getMutableLoc().isValid(); } | ||||
1510 | |||||
1511 | /// Determine whether this method has qualifiers. | ||||
1512 | bool hasMethodTypeQualifiers() const { | ||||
1513 | return MethodQualifiers && (MethodQualifiers->getTypeQualifiers() || | ||||
1514 | MethodQualifiers->getAttributes().size()); | ||||
1515 | } | ||||
1516 | |||||
1517 | /// Get the type of exception specification this function has. | ||||
1518 | ExceptionSpecificationType getExceptionSpecType() const { | ||||
1519 | return static_cast<ExceptionSpecificationType>(ExceptionSpecType); | ||||
1520 | } | ||||
1521 | |||||
1522 | /// Get the number of dynamic exception specifications. | ||||
1523 | unsigned getNumExceptions() const { | ||||
1524 | assert(ExceptionSpecType != EST_None)(static_cast <bool> (ExceptionSpecType != EST_None) ? void (0) : __assert_fail ("ExceptionSpecType != EST_None", "clang/include/clang/Sema/DeclSpec.h" , 1524, __extension__ __PRETTY_FUNCTION__)); | ||||
1525 | return NumExceptionsOrDecls; | ||||
1526 | } | ||||
1527 | |||||
1528 | /// Get the non-parameter decls defined within this function | ||||
1529 | /// prototype. Typically these are tag declarations. | ||||
1530 | ArrayRef<NamedDecl *> getDeclsInPrototype() const { | ||||
1531 | assert(ExceptionSpecType == EST_None)(static_cast <bool> (ExceptionSpecType == EST_None) ? void (0) : __assert_fail ("ExceptionSpecType == EST_None", "clang/include/clang/Sema/DeclSpec.h" , 1531, __extension__ __PRETTY_FUNCTION__)); | ||||
1532 | return llvm::ArrayRef(DeclsInPrototype, NumExceptionsOrDecls); | ||||
1533 | } | ||||
1534 | |||||
1535 | /// Determine whether this function declarator had a | ||||
1536 | /// trailing-return-type. | ||||
1537 | bool hasTrailingReturnType() const { return HasTrailingReturnType; } | ||||
1538 | |||||
1539 | /// Get the trailing-return-type for this function declarator. | ||||
1540 | ParsedType getTrailingReturnType() const { | ||||
1541 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "clang/include/clang/Sema/DeclSpec.h" , 1541, __extension__ __PRETTY_FUNCTION__)); | ||||
1542 | return TrailingReturnType; | ||||
1543 | } | ||||
1544 | |||||
1545 | /// Get the trailing-return-type location for this function declarator. | ||||
1546 | SourceLocation getTrailingReturnTypeLoc() const { | ||||
1547 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "clang/include/clang/Sema/DeclSpec.h" , 1547, __extension__ __PRETTY_FUNCTION__)); | ||||
1548 | return TrailingReturnTypeLoc; | ||||
1549 | } | ||||
1550 | }; | ||||
1551 | |||||
1552 | struct BlockPointerTypeInfo { | ||||
1553 | /// For now, sema will catch these as invalid. | ||||
1554 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. | ||||
1555 | unsigned TypeQuals : 5; | ||||
1556 | |||||
1557 | void destroy() { | ||||
1558 | } | ||||
1559 | }; | ||||
1560 | |||||
1561 | struct MemberPointerTypeInfo { | ||||
1562 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. | ||||
1563 | unsigned TypeQuals : 5; | ||||
1564 | /// Location of the '*' token. | ||||
1565 | SourceLocation StarLoc; | ||||
1566 | // CXXScopeSpec has a constructor, so it can't be a direct member. | ||||
1567 | // So we need some pointer-aligned storage and a bit of trickery. | ||||
1568 | alignas(CXXScopeSpec) char ScopeMem[sizeof(CXXScopeSpec)]; | ||||
1569 | CXXScopeSpec &Scope() { | ||||
1570 | return *reinterpret_cast<CXXScopeSpec *>(ScopeMem); | ||||
1571 | } | ||||
1572 | const CXXScopeSpec &Scope() const { | ||||
1573 | return *reinterpret_cast<const CXXScopeSpec *>(ScopeMem); | ||||
1574 | } | ||||
1575 | void destroy() { | ||||
1576 | Scope().~CXXScopeSpec(); | ||||
1577 | } | ||||
1578 | }; | ||||
1579 | |||||
1580 | struct PipeTypeInfo { | ||||
1581 | /// The access writes. | ||||
1582 | unsigned AccessWrites : 3; | ||||
1583 | |||||
1584 | void destroy() {} | ||||
1585 | }; | ||||
1586 | |||||
1587 | union { | ||||
1588 | PointerTypeInfo Ptr; | ||||
1589 | ReferenceTypeInfo Ref; | ||||
1590 | ArrayTypeInfo Arr; | ||||
1591 | FunctionTypeInfo Fun; | ||||
1592 | BlockPointerTypeInfo Cls; | ||||
1593 | MemberPointerTypeInfo Mem; | ||||
1594 | PipeTypeInfo PipeInfo; | ||||
1595 | }; | ||||
1596 | |||||
1597 | void destroy() { | ||||
1598 | switch (Kind) { | ||||
1599 | case DeclaratorChunk::Function: return Fun.destroy(); | ||||
1600 | case DeclaratorChunk::Pointer: return Ptr.destroy(); | ||||
1601 | case DeclaratorChunk::BlockPointer: return Cls.destroy(); | ||||
1602 | case DeclaratorChunk::Reference: return Ref.destroy(); | ||||
1603 | case DeclaratorChunk::Array: return Arr.destroy(); | ||||
1604 | case DeclaratorChunk::MemberPointer: return Mem.destroy(); | ||||
1605 | case DeclaratorChunk::Paren: return; | ||||
1606 | case DeclaratorChunk::Pipe: return PipeInfo.destroy(); | ||||
1607 | } | ||||
1608 | } | ||||
1609 | |||||
1610 | /// If there are attributes applied to this declaratorchunk, return | ||||
1611 | /// them. | ||||
1612 | const ParsedAttributesView &getAttrs() const { return AttrList; } | ||||
1613 | ParsedAttributesView &getAttrs() { return AttrList; } | ||||
1614 | |||||
1615 | /// Return a DeclaratorChunk for a pointer. | ||||
1616 | static DeclaratorChunk getPointer(unsigned TypeQuals, SourceLocation Loc, | ||||
1617 | SourceLocation ConstQualLoc, | ||||
1618 | SourceLocation VolatileQualLoc, | ||||
1619 | SourceLocation RestrictQualLoc, | ||||
1620 | SourceLocation AtomicQualLoc, | ||||
1621 | SourceLocation UnalignedQualLoc) { | ||||
1622 | DeclaratorChunk I; | ||||
1623 | I.Kind = Pointer; | ||||
1624 | I.Loc = Loc; | ||||
1625 | new (&I.Ptr) PointerTypeInfo; | ||||
1626 | I.Ptr.TypeQuals = TypeQuals; | ||||
1627 | I.Ptr.ConstQualLoc = ConstQualLoc; | ||||
1628 | I.Ptr.VolatileQualLoc = VolatileQualLoc; | ||||
1629 | I.Ptr.RestrictQualLoc = RestrictQualLoc; | ||||
1630 | I.Ptr.AtomicQualLoc = AtomicQualLoc; | ||||
1631 | I.Ptr.UnalignedQualLoc = UnalignedQualLoc; | ||||
1632 | return I; | ||||
1633 | } | ||||
1634 | |||||
1635 | /// Return a DeclaratorChunk for a reference. | ||||
1636 | static DeclaratorChunk getReference(unsigned TypeQuals, SourceLocation Loc, | ||||
1637 | bool lvalue) { | ||||
1638 | DeclaratorChunk I; | ||||
1639 | I.Kind = Reference; | ||||
1640 | I.Loc = Loc; | ||||
1641 | I.Ref.HasRestrict = (TypeQuals & DeclSpec::TQ_restrict) != 0; | ||||
1642 | I.Ref.LValueRef = lvalue; | ||||
1643 | return I; | ||||
1644 | } | ||||
1645 | |||||
1646 | /// Return a DeclaratorChunk for an array. | ||||
1647 | static DeclaratorChunk getArray(unsigned TypeQuals, | ||||
1648 | bool isStatic, bool isStar, Expr *NumElts, | ||||
1649 | SourceLocation LBLoc, SourceLocation RBLoc) { | ||||
1650 | DeclaratorChunk I; | ||||
1651 | I.Kind = Array; | ||||
1652 | I.Loc = LBLoc; | ||||
1653 | I.EndLoc = RBLoc; | ||||
1654 | I.Arr.TypeQuals = TypeQuals; | ||||
1655 | I.Arr.hasStatic = isStatic; | ||||
1656 | I.Arr.isStar = isStar; | ||||
1657 | I.Arr.NumElts = NumElts; | ||||
1658 | return I; | ||||
1659 | } | ||||
1660 | |||||
1661 | /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function. | ||||
1662 | /// "TheDeclarator" is the declarator that this will be added to. | ||||
1663 | static DeclaratorChunk getFunction(bool HasProto, | ||||
1664 | bool IsAmbiguous, | ||||
1665 | SourceLocation LParenLoc, | ||||
1666 | ParamInfo *Params, unsigned NumParams, | ||||
1667 | SourceLocation EllipsisLoc, | ||||
1668 | SourceLocation RParenLoc, | ||||
1669 | bool RefQualifierIsLvalueRef, | ||||
1670 | SourceLocation RefQualifierLoc, | ||||
1671 | SourceLocation MutableLoc, | ||||
1672 | ExceptionSpecificationType ESpecType, | ||||
1673 | SourceRange ESpecRange, | ||||
1674 | ParsedType *Exceptions, | ||||
1675 | SourceRange *ExceptionRanges, | ||||
1676 | unsigned NumExceptions, | ||||
1677 | Expr *NoexceptExpr, | ||||
1678 | CachedTokens *ExceptionSpecTokens, | ||||
1679 | ArrayRef<NamedDecl *> DeclsInPrototype, | ||||
1680 | SourceLocation LocalRangeBegin, | ||||
1681 | SourceLocation LocalRangeEnd, | ||||
1682 | Declarator &TheDeclarator, | ||||
1683 | TypeResult TrailingReturnType = | ||||
1684 | TypeResult(), | ||||
1685 | SourceLocation TrailingReturnTypeLoc = | ||||
1686 | SourceLocation(), | ||||
1687 | DeclSpec *MethodQualifiers = nullptr); | ||||
1688 | |||||
1689 | /// Return a DeclaratorChunk for a block. | ||||
1690 | static DeclaratorChunk getBlockPointer(unsigned TypeQuals, | ||||
1691 | SourceLocation Loc) { | ||||
1692 | DeclaratorChunk I; | ||||
1693 | I.Kind = BlockPointer; | ||||
1694 | I.Loc = Loc; | ||||
1695 | I.Cls.TypeQuals = TypeQuals; | ||||
1696 | return I; | ||||
1697 | } | ||||
1698 | |||||
1699 | /// Return a DeclaratorChunk for a block. | ||||
1700 | static DeclaratorChunk getPipe(unsigned TypeQuals, | ||||
1701 | SourceLocation Loc) { | ||||
1702 | DeclaratorChunk I; | ||||
1703 | I.Kind = Pipe; | ||||
1704 | I.Loc = Loc; | ||||
1705 | I.Cls.TypeQuals = TypeQuals; | ||||
1706 | return I; | ||||
1707 | } | ||||
1708 | |||||
1709 | static DeclaratorChunk getMemberPointer(const CXXScopeSpec &SS, | ||||
1710 | unsigned TypeQuals, | ||||
1711 | SourceLocation StarLoc, | ||||
1712 | SourceLocation EndLoc) { | ||||
1713 | DeclaratorChunk I; | ||||
1714 | I.Kind = MemberPointer; | ||||
1715 | I.Loc = SS.getBeginLoc(); | ||||
1716 | I.EndLoc = EndLoc; | ||||
1717 | new (&I.Mem) MemberPointerTypeInfo; | ||||
1718 | I.Mem.StarLoc = StarLoc; | ||||
1719 | I.Mem.TypeQuals = TypeQuals; | ||||
1720 | new (I.Mem.ScopeMem) CXXScopeSpec(SS); | ||||
1721 | return I; | ||||
1722 | } | ||||
1723 | |||||
1724 | /// Return a DeclaratorChunk for a paren. | ||||
1725 | static DeclaratorChunk getParen(SourceLocation LParenLoc, | ||||
1726 | SourceLocation RParenLoc) { | ||||
1727 | DeclaratorChunk I; | ||||
1728 | I.Kind = Paren; | ||||
1729 | I.Loc = LParenLoc; | ||||
1730 | I.EndLoc = RParenLoc; | ||||
1731 | return I; | ||||
1732 | } | ||||
1733 | |||||
1734 | bool isParen() const { | ||||
1735 | return Kind == Paren; | ||||
1736 | } | ||||
1737 | }; | ||||
1738 | |||||
1739 | /// A parsed C++17 decomposition declarator of the form | ||||
1740 | /// '[' identifier-list ']' | ||||
1741 | class DecompositionDeclarator { | ||||
1742 | public: | ||||
1743 | struct Binding { | ||||
1744 | IdentifierInfo *Name; | ||||
1745 | SourceLocation NameLoc; | ||||
1746 | }; | ||||
1747 | |||||
1748 | private: | ||||
1749 | /// The locations of the '[' and ']' tokens. | ||||
1750 | SourceLocation LSquareLoc, RSquareLoc; | ||||
1751 | |||||
1752 | /// The bindings. | ||||
1753 | Binding *Bindings; | ||||
1754 | unsigned NumBindings : 31; | ||||
1755 | unsigned DeleteBindings : 1; | ||||
1756 | |||||
1757 | friend class Declarator; | ||||
1758 | |||||
1759 | public: | ||||
1760 | DecompositionDeclarator() | ||||
1761 | : Bindings(nullptr), NumBindings(0), DeleteBindings(false) {} | ||||
1762 | DecompositionDeclarator(const DecompositionDeclarator &G) = delete; | ||||
1763 | DecompositionDeclarator &operator=(const DecompositionDeclarator &G) = delete; | ||||
1764 | ~DecompositionDeclarator() { | ||||
1765 | if (DeleteBindings) | ||||
1766 | delete[] Bindings; | ||||
1767 | } | ||||
1768 | |||||
1769 | void clear() { | ||||
1770 | LSquareLoc = RSquareLoc = SourceLocation(); | ||||
1771 | if (DeleteBindings) | ||||
1772 | delete[] Bindings; | ||||
1773 | Bindings = nullptr; | ||||
1774 | NumBindings = 0; | ||||
1775 | DeleteBindings = false; | ||||
1776 | } | ||||
1777 | |||||
1778 | ArrayRef<Binding> bindings() const { | ||||
1779 | return llvm::ArrayRef(Bindings, NumBindings); | ||||
1780 | } | ||||
1781 | |||||
1782 | bool isSet() const { return LSquareLoc.isValid(); } | ||||
1783 | |||||
1784 | SourceLocation getLSquareLoc() const { return LSquareLoc; } | ||||
1785 | SourceLocation getRSquareLoc() const { return RSquareLoc; } | ||||
1786 | SourceRange getSourceRange() const { | ||||
1787 | return SourceRange(LSquareLoc, RSquareLoc); | ||||
1788 | } | ||||
1789 | }; | ||||
1790 | |||||
1791 | /// Described the kind of function definition (if any) provided for | ||||
1792 | /// a function. | ||||
1793 | enum class FunctionDefinitionKind { | ||||
1794 | Declaration, | ||||
1795 | Definition, | ||||
1796 | Defaulted, | ||||
1797 | Deleted | ||||
1798 | }; | ||||
1799 | |||||
1800 | enum class DeclaratorContext { | ||||
1801 | File, // File scope declaration. | ||||
1802 | Prototype, // Within a function prototype. | ||||
1803 | ObjCResult, // An ObjC method result type. | ||||
1804 | ObjCParameter, // An ObjC method parameter type. | ||||
1805 | KNRTypeList, // K&R type definition list for formals. | ||||
1806 | TypeName, // Abstract declarator for types. | ||||
1807 | FunctionalCast, // Type in a C++ functional cast expression. | ||||
1808 | Member, // Struct/Union field. | ||||
1809 | Block, // Declaration within a block in a function. | ||||
1810 | ForInit, // Declaration within first part of a for loop. | ||||
1811 | SelectionInit, // Declaration within optional init stmt of if/switch. | ||||
1812 | Condition, // Condition declaration in a C++ if/switch/while/for. | ||||
1813 | TemplateParam, // Within a template parameter list. | ||||
1814 | CXXNew, // C++ new-expression. | ||||
1815 | CXXCatch, // C++ catch exception-declaration | ||||
1816 | ObjCCatch, // Objective-C catch exception-declaration | ||||
1817 | BlockLiteral, // Block literal declarator. | ||||
1818 | LambdaExpr, // Lambda-expression declarator. | ||||
1819 | LambdaExprParameter, // Lambda-expression parameter declarator. | ||||
1820 | ConversionId, // C++ conversion-type-id. | ||||
1821 | TrailingReturn, // C++11 trailing-type-specifier. | ||||
1822 | TrailingReturnVar, // C++11 trailing-type-specifier for variable. | ||||
1823 | TemplateArg, // Any template argument (in template argument list). | ||||
1824 | TemplateTypeArg, // Template type argument (in default argument). | ||||
1825 | AliasDecl, // C++11 alias-declaration. | ||||
1826 | AliasTemplate, // C++11 alias-declaration template. | ||||
1827 | RequiresExpr, // C++2a requires-expression. | ||||
1828 | Association // C11 _Generic selection expression association. | ||||
1829 | }; | ||||
1830 | |||||
1831 | // Describes whether the current context is a context where an implicit | ||||
1832 | // typename is allowed (C++2a [temp.res]p5]). | ||||
1833 | enum class ImplicitTypenameContext { | ||||
1834 | No, | ||||
1835 | Yes, | ||||
1836 | }; | ||||
1837 | |||||
1838 | /// Information about one declarator, including the parsed type | ||||
1839 | /// information and the identifier. | ||||
1840 | /// | ||||
1841 | /// When the declarator is fully formed, this is turned into the appropriate | ||||
1842 | /// Decl object. | ||||
1843 | /// | ||||
1844 | /// Declarators come in two types: normal declarators and abstract declarators. | ||||
1845 | /// Abstract declarators are used when parsing types, and don't have an | ||||
1846 | /// identifier. Normal declarators do have ID's. | ||||
1847 | /// | ||||
1848 | /// Instances of this class should be a transient object that lives on the | ||||
1849 | /// stack, not objects that are allocated in large quantities on the heap. | ||||
1850 | class Declarator { | ||||
1851 | |||||
1852 | private: | ||||
1853 | const DeclSpec &DS; | ||||
1854 | CXXScopeSpec SS; | ||||
1855 | UnqualifiedId Name; | ||||
1856 | SourceRange Range; | ||||
1857 | |||||
1858 | /// Where we are parsing this declarator. | ||||
1859 | DeclaratorContext Context; | ||||
1860 | |||||
1861 | /// The C++17 structured binding, if any. This is an alternative to a Name. | ||||
1862 | DecompositionDeclarator BindingGroup; | ||||
1863 | |||||
1864 | /// DeclTypeInfo - This holds each type that the declarator includes as it is | ||||
1865 | /// parsed. This is pushed from the identifier out, which means that element | ||||
1866 | /// #0 will be the most closely bound to the identifier, and | ||||
1867 | /// DeclTypeInfo.back() will be the least closely bound. | ||||
1868 | SmallVector<DeclaratorChunk, 8> DeclTypeInfo; | ||||
1869 | |||||
1870 | /// InvalidType - Set by Sema::GetTypeForDeclarator(). | ||||
1871 | unsigned InvalidType : 1; | ||||
1872 | |||||
1873 | /// GroupingParens - Set by Parser::ParseParenDeclarator(). | ||||
1874 | unsigned GroupingParens : 1; | ||||
1875 | |||||
1876 | /// FunctionDefinition - Is this Declarator for a function or member | ||||
1877 | /// definition and, if so, what kind? | ||||
1878 | /// | ||||
1879 | /// Actually a FunctionDefinitionKind. | ||||
1880 | unsigned FunctionDefinition : 2; | ||||
1881 | |||||
1882 | /// Is this Declarator a redeclaration? | ||||
1883 | unsigned Redeclaration : 1; | ||||
1884 | |||||
1885 | /// true if the declaration is preceded by \c __extension__. | ||||
1886 | unsigned Extension : 1; | ||||
1887 | |||||
1888 | /// Indicates whether this is an Objective-C instance variable. | ||||
1889 | unsigned ObjCIvar : 1; | ||||
1890 | |||||
1891 | /// Indicates whether this is an Objective-C 'weak' property. | ||||
1892 | unsigned ObjCWeakProperty : 1; | ||||
1893 | |||||
1894 | /// Indicates whether the InlineParams / InlineBindings storage has been used. | ||||
1895 | unsigned InlineStorageUsed : 1; | ||||
1896 | |||||
1897 | /// Indicates whether this declarator has an initializer. | ||||
1898 | unsigned HasInitializer : 1; | ||||
1899 | |||||
1900 | /// Attributes attached to the declarator. | ||||
1901 | ParsedAttributes Attrs; | ||||
1902 | |||||
1903 | /// Attributes attached to the declaration. See also documentation for the | ||||
1904 | /// corresponding constructor parameter. | ||||
1905 | const ParsedAttributesView &DeclarationAttrs; | ||||
1906 | |||||
1907 | /// The asm label, if specified. | ||||
1908 | Expr *AsmLabel; | ||||
1909 | |||||
1910 | /// \brief The constraint-expression specified by the trailing | ||||
1911 | /// requires-clause, or null if no such clause was specified. | ||||
1912 | Expr *TrailingRequiresClause; | ||||
1913 | |||||
1914 | /// If this declarator declares a template, its template parameter lists. | ||||
1915 | ArrayRef<TemplateParameterList *> TemplateParameterLists; | ||||
1916 | |||||
1917 | /// If the declarator declares an abbreviated function template, the innermost | ||||
1918 | /// template parameter list containing the invented and explicit template | ||||
1919 | /// parameters (if any). | ||||
1920 | TemplateParameterList *InventedTemplateParameterList; | ||||
1921 | |||||
1922 | #ifndef _MSC_VER | ||||
1923 | union { | ||||
1924 | #endif | ||||
1925 | /// InlineParams - This is a local array used for the first function decl | ||||
1926 | /// chunk to avoid going to the heap for the common case when we have one | ||||
1927 | /// function chunk in the declarator. | ||||
1928 | DeclaratorChunk::ParamInfo InlineParams[16]; | ||||
1929 | DecompositionDeclarator::Binding InlineBindings[16]; | ||||
1930 | #ifndef _MSC_VER | ||||
1931 | }; | ||||
1932 | #endif | ||||
1933 | |||||
1934 | /// If this is the second or subsequent declarator in this declaration, | ||||
1935 | /// the location of the comma before this declarator. | ||||
1936 | SourceLocation CommaLoc; | ||||
1937 | |||||
1938 | /// If provided, the source location of the ellipsis used to describe | ||||
1939 | /// this declarator as a parameter pack. | ||||
1940 | SourceLocation EllipsisLoc; | ||||
1941 | |||||
1942 | friend struct DeclaratorChunk; | ||||
1943 | |||||
1944 | public: | ||||
1945 | /// `DS` and `DeclarationAttrs` must outlive the `Declarator`. In particular, | ||||
1946 | /// take care not to pass temporary objects for these parameters. | ||||
1947 | /// | ||||
1948 | /// `DeclarationAttrs` contains [[]] attributes from the | ||||
1949 | /// attribute-specifier-seq at the beginning of a declaration, which appertain | ||||
1950 | /// to the declared entity itself. Attributes with other syntax (e.g. GNU) | ||||
1951 | /// should not be placed in this attribute list; if they occur at the | ||||
1952 | /// beginning of a declaration, they apply to the `DeclSpec` and should be | ||||
1953 | /// attached to that instead. | ||||
1954 | /// | ||||
1955 | /// Here is an example of an attribute associated with a declaration: | ||||
1956 | /// | ||||
1957 | /// [[deprecated]] int x, y; | ||||
1958 | /// | ||||
1959 | /// This attribute appertains to all of the entities declared in the | ||||
1960 | /// declaration, i.e. `x` and `y` in this case. | ||||
1961 | Declarator(const DeclSpec &DS, const ParsedAttributesView &DeclarationAttrs, | ||||
1962 | DeclaratorContext C) | ||||
1963 | : DS(DS), Range(DS.getSourceRange()), Context(C), | ||||
1964 | InvalidType(DS.getTypeSpecType() == DeclSpec::TST_error), | ||||
1965 | GroupingParens(false), FunctionDefinition(static_cast<unsigned>( | ||||
1966 | FunctionDefinitionKind::Declaration)), | ||||
1967 | Redeclaration(false), Extension(false), ObjCIvar(false), | ||||
1968 | ObjCWeakProperty(false), InlineStorageUsed(false), | ||||
1969 | HasInitializer(false), Attrs(DS.getAttributePool().getFactory()), | ||||
1970 | DeclarationAttrs(DeclarationAttrs), AsmLabel(nullptr), | ||||
1971 | TrailingRequiresClause(nullptr), | ||||
1972 | InventedTemplateParameterList(nullptr) { | ||||
1973 | assert(llvm::all_of(DeclarationAttrs,(static_cast <bool> (llvm::all_of(DeclarationAttrs, []( const ParsedAttr &AL) { return AL.isStandardAttributeSyntax (); }) && "DeclarationAttrs may only contain [[]] attributes" ) ? void (0) : __assert_fail ("llvm::all_of(DeclarationAttrs, [](const ParsedAttr &AL) { return AL.isStandardAttributeSyntax(); }) && \"DeclarationAttrs may only contain [[]] attributes\"" , "clang/include/clang/Sema/DeclSpec.h", 1977, __extension__ __PRETTY_FUNCTION__ )) | ||||
1974 | [](const ParsedAttr &AL) {(static_cast <bool> (llvm::all_of(DeclarationAttrs, []( const ParsedAttr &AL) { return AL.isStandardAttributeSyntax (); }) && "DeclarationAttrs may only contain [[]] attributes" ) ? void (0) : __assert_fail ("llvm::all_of(DeclarationAttrs, [](const ParsedAttr &AL) { return AL.isStandardAttributeSyntax(); }) && \"DeclarationAttrs may only contain [[]] attributes\"" , "clang/include/clang/Sema/DeclSpec.h", 1977, __extension__ __PRETTY_FUNCTION__ )) | ||||
1975 | return AL.isStandardAttributeSyntax();(static_cast <bool> (llvm::all_of(DeclarationAttrs, []( const ParsedAttr &AL) { return AL.isStandardAttributeSyntax (); }) && "DeclarationAttrs may only contain [[]] attributes" ) ? void (0) : __assert_fail ("llvm::all_of(DeclarationAttrs, [](const ParsedAttr &AL) { return AL.isStandardAttributeSyntax(); }) && \"DeclarationAttrs may only contain [[]] attributes\"" , "clang/include/clang/Sema/DeclSpec.h", 1977, __extension__ __PRETTY_FUNCTION__ )) | ||||
1976 | }) &&(static_cast <bool> (llvm::all_of(DeclarationAttrs, []( const ParsedAttr &AL) { return AL.isStandardAttributeSyntax (); }) && "DeclarationAttrs may only contain [[]] attributes" ) ? void (0) : __assert_fail ("llvm::all_of(DeclarationAttrs, [](const ParsedAttr &AL) { return AL.isStandardAttributeSyntax(); }) && \"DeclarationAttrs may only contain [[]] attributes\"" , "clang/include/clang/Sema/DeclSpec.h", 1977, __extension__ __PRETTY_FUNCTION__ )) | ||||
1977 | "DeclarationAttrs may only contain [[]] attributes")(static_cast <bool> (llvm::all_of(DeclarationAttrs, []( const ParsedAttr &AL) { return AL.isStandardAttributeSyntax (); }) && "DeclarationAttrs may only contain [[]] attributes" ) ? void (0) : __assert_fail ("llvm::all_of(DeclarationAttrs, [](const ParsedAttr &AL) { return AL.isStandardAttributeSyntax(); }) && \"DeclarationAttrs may only contain [[]] attributes\"" , "clang/include/clang/Sema/DeclSpec.h", 1977, __extension__ __PRETTY_FUNCTION__ )); | ||||
1978 | } | ||||
1979 | |||||
1980 | ~Declarator() { | ||||
1981 | clear(); | ||||
1982 | } | ||||
1983 | /// getDeclSpec - Return the declaration-specifier that this declarator was | ||||
1984 | /// declared with. | ||||
1985 | const DeclSpec &getDeclSpec() const { return DS; } | ||||
1986 | |||||
1987 | /// getMutableDeclSpec - Return a non-const version of the DeclSpec. This | ||||
1988 | /// should be used with extreme care: declspecs can often be shared between | ||||
1989 | /// multiple declarators, so mutating the DeclSpec affects all of the | ||||
1990 | /// Declarators. This should only be done when the declspec is known to not | ||||
1991 | /// be shared or when in error recovery etc. | ||||
1992 | DeclSpec &getMutableDeclSpec() { return const_cast<DeclSpec &>(DS); } | ||||
1993 | |||||
1994 | AttributePool &getAttributePool() const { | ||||
1995 | return Attrs.getPool(); | ||||
1996 | } | ||||
1997 | |||||
1998 | /// getCXXScopeSpec - Return the C++ scope specifier (global scope or | ||||
1999 | /// nested-name-specifier) that is part of the declarator-id. | ||||
2000 | const CXXScopeSpec &getCXXScopeSpec() const { return SS; } | ||||
2001 | CXXScopeSpec &getCXXScopeSpec() { return SS; } | ||||
2002 | |||||
2003 | /// Retrieve the name specified by this declarator. | ||||
2004 | UnqualifiedId &getName() { return Name; } | ||||
2005 | |||||
2006 | const DecompositionDeclarator &getDecompositionDeclarator() const { | ||||
2007 | return BindingGroup; | ||||
2008 | } | ||||
2009 | |||||
2010 | DeclaratorContext getContext() const { return Context; } | ||||
2011 | |||||
2012 | bool isPrototypeContext() const { | ||||
2013 | return (Context == DeclaratorContext::Prototype || | ||||
2014 | Context == DeclaratorContext::ObjCParameter || | ||||
2015 | Context == DeclaratorContext::ObjCResult || | ||||
2016 | Context == DeclaratorContext::LambdaExprParameter); | ||||
2017 | } | ||||
2018 | |||||
2019 | /// Get the source range that spans this declarator. | ||||
2020 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } | ||||
2021 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } | ||||
2022 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } | ||||
2023 | |||||
2024 | void SetSourceRange(SourceRange R) { Range = R; } | ||||
2025 | /// SetRangeBegin - Set the start of the source range to Loc, unless it's | ||||
2026 | /// invalid. | ||||
2027 | void SetRangeBegin(SourceLocation Loc) { | ||||
2028 | if (!Loc.isInvalid()) | ||||
2029 | Range.setBegin(Loc); | ||||
2030 | } | ||||
2031 | /// SetRangeEnd - Set the end of the source range to Loc, unless it's invalid. | ||||
2032 | void SetRangeEnd(SourceLocation Loc) { | ||||
2033 | if (!Loc.isInvalid()) | ||||
2034 | Range.setEnd(Loc); | ||||
2035 | } | ||||
2036 | /// ExtendWithDeclSpec - Extend the declarator source range to include the | ||||
2037 | /// given declspec, unless its location is invalid. Adopts the range start if | ||||
2038 | /// the current range start is invalid. | ||||
2039 | void ExtendWithDeclSpec(const DeclSpec &DS) { | ||||
2040 | SourceRange SR = DS.getSourceRange(); | ||||
2041 | if (Range.getBegin().isInvalid()) | ||||
2042 | Range.setBegin(SR.getBegin()); | ||||
2043 | if (!SR.getEnd().isInvalid()) | ||||
2044 | Range.setEnd(SR.getEnd()); | ||||
2045 | } | ||||
2046 | |||||
2047 | /// Reset the contents of this Declarator. | ||||
2048 | void clear() { | ||||
2049 | SS.clear(); | ||||
2050 | Name.clear(); | ||||
2051 | Range = DS.getSourceRange(); | ||||
2052 | BindingGroup.clear(); | ||||
2053 | |||||
2054 | for (unsigned i = 0, e = DeclTypeInfo.size(); i != e; ++i) | ||||
2055 | DeclTypeInfo[i].destroy(); | ||||
2056 | DeclTypeInfo.clear(); | ||||
2057 | Attrs.clear(); | ||||
2058 | AsmLabel = nullptr; | ||||
2059 | InlineStorageUsed = false; | ||||
2060 | HasInitializer = false; | ||||
2061 | ObjCIvar = false; | ||||
2062 | ObjCWeakProperty = false; | ||||
2063 | CommaLoc = SourceLocation(); | ||||
2064 | EllipsisLoc = SourceLocation(); | ||||
2065 | } | ||||
2066 | |||||
2067 | /// mayOmitIdentifier - Return true if the identifier is either optional or | ||||
2068 | /// not allowed. This is true for typenames, prototypes, and template | ||||
2069 | /// parameter lists. | ||||
2070 | bool mayOmitIdentifier() const { | ||||
2071 | switch (Context) { | ||||
2072 | case DeclaratorContext::File: | ||||
2073 | case DeclaratorContext::KNRTypeList: | ||||
2074 | case DeclaratorContext::Member: | ||||
2075 | case DeclaratorContext::Block: | ||||
2076 | case DeclaratorContext::ForInit: | ||||
2077 | case DeclaratorContext::SelectionInit: | ||||
2078 | case DeclaratorContext::Condition: | ||||
2079 | return false; | ||||
2080 | |||||
2081 | case DeclaratorContext::TypeName: | ||||
2082 | case DeclaratorContext::FunctionalCast: | ||||
2083 | case DeclaratorContext::AliasDecl: | ||||
2084 | case DeclaratorContext::AliasTemplate: | ||||
2085 | case DeclaratorContext::Prototype: | ||||
2086 | case DeclaratorContext::LambdaExprParameter: | ||||
2087 | case DeclaratorContext::ObjCParameter: | ||||
2088 | case DeclaratorContext::ObjCResult: | ||||
2089 | case DeclaratorContext::TemplateParam: | ||||
2090 | case DeclaratorContext::CXXNew: | ||||
2091 | case DeclaratorContext::CXXCatch: | ||||
2092 | case DeclaratorContext::ObjCCatch: | ||||
2093 | case DeclaratorContext::BlockLiteral: | ||||
2094 | case DeclaratorContext::LambdaExpr: | ||||
2095 | case DeclaratorContext::ConversionId: | ||||
2096 | case DeclaratorContext::TemplateArg: | ||||
2097 | case DeclaratorContext::TemplateTypeArg: | ||||
2098 | case DeclaratorContext::TrailingReturn: | ||||
2099 | case DeclaratorContext::TrailingReturnVar: | ||||
2100 | case DeclaratorContext::RequiresExpr: | ||||
2101 | case DeclaratorContext::Association: | ||||
2102 | return true; | ||||
2103 | } | ||||
2104 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2104); | ||||
2105 | } | ||||
2106 | |||||
2107 | /// mayHaveIdentifier - Return true if the identifier is either optional or | ||||
2108 | /// required. This is true for normal declarators and prototypes, but not | ||||
2109 | /// typenames. | ||||
2110 | bool mayHaveIdentifier() const { | ||||
2111 | switch (Context) { | ||||
2112 | case DeclaratorContext::File: | ||||
2113 | case DeclaratorContext::KNRTypeList: | ||||
2114 | case DeclaratorContext::Member: | ||||
2115 | case DeclaratorContext::Block: | ||||
2116 | case DeclaratorContext::ForInit: | ||||
2117 | case DeclaratorContext::SelectionInit: | ||||
2118 | case DeclaratorContext::Condition: | ||||
2119 | case DeclaratorContext::Prototype: | ||||
2120 | case DeclaratorContext::LambdaExprParameter: | ||||
2121 | case DeclaratorContext::TemplateParam: | ||||
2122 | case DeclaratorContext::CXXCatch: | ||||
2123 | case DeclaratorContext::ObjCCatch: | ||||
2124 | case DeclaratorContext::RequiresExpr: | ||||
2125 | return true; | ||||
2126 | |||||
2127 | case DeclaratorContext::TypeName: | ||||
2128 | case DeclaratorContext::FunctionalCast: | ||||
2129 | case DeclaratorContext::CXXNew: | ||||
2130 | case DeclaratorContext::AliasDecl: | ||||
2131 | case DeclaratorContext::AliasTemplate: | ||||
2132 | case DeclaratorContext::ObjCParameter: | ||||
2133 | case DeclaratorContext::ObjCResult: | ||||
2134 | case DeclaratorContext::BlockLiteral: | ||||
2135 | case DeclaratorContext::LambdaExpr: | ||||
2136 | case DeclaratorContext::ConversionId: | ||||
2137 | case DeclaratorContext::TemplateArg: | ||||
2138 | case DeclaratorContext::TemplateTypeArg: | ||||
2139 | case DeclaratorContext::TrailingReturn: | ||||
2140 | case DeclaratorContext::TrailingReturnVar: | ||||
2141 | case DeclaratorContext::Association: | ||||
2142 | return false; | ||||
2143 | } | ||||
2144 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2144); | ||||
2145 | } | ||||
2146 | |||||
2147 | /// Return true if the context permits a C++17 decomposition declarator. | ||||
2148 | bool mayHaveDecompositionDeclarator() const { | ||||
2149 | switch (Context) { | ||||
2150 | case DeclaratorContext::File: | ||||
2151 | // FIXME: It's not clear that the proposal meant to allow file-scope | ||||
2152 | // structured bindings, but it does. | ||||
2153 | case DeclaratorContext::Block: | ||||
2154 | case DeclaratorContext::ForInit: | ||||
2155 | case DeclaratorContext::SelectionInit: | ||||
2156 | case DeclaratorContext::Condition: | ||||
2157 | return true; | ||||
2158 | |||||
2159 | case DeclaratorContext::Member: | ||||
2160 | case DeclaratorContext::Prototype: | ||||
2161 | case DeclaratorContext::TemplateParam: | ||||
2162 | case DeclaratorContext::RequiresExpr: | ||||
2163 | // Maybe one day... | ||||
2164 | return false; | ||||
2165 | |||||
2166 | // These contexts don't allow any kind of non-abstract declarator. | ||||
2167 | case DeclaratorContext::KNRTypeList: | ||||
2168 | case DeclaratorContext::TypeName: | ||||
2169 | case DeclaratorContext::FunctionalCast: | ||||
2170 | case DeclaratorContext::AliasDecl: | ||||
2171 | case DeclaratorContext::AliasTemplate: | ||||
2172 | case DeclaratorContext::LambdaExprParameter: | ||||
2173 | case DeclaratorContext::ObjCParameter: | ||||
2174 | case DeclaratorContext::ObjCResult: | ||||
2175 | case DeclaratorContext::CXXNew: | ||||
2176 | case DeclaratorContext::CXXCatch: | ||||
2177 | case DeclaratorContext::ObjCCatch: | ||||
2178 | case DeclaratorContext::BlockLiteral: | ||||
2179 | case DeclaratorContext::LambdaExpr: | ||||
2180 | case DeclaratorContext::ConversionId: | ||||
2181 | case DeclaratorContext::TemplateArg: | ||||
2182 | case DeclaratorContext::TemplateTypeArg: | ||||
2183 | case DeclaratorContext::TrailingReturn: | ||||
2184 | case DeclaratorContext::TrailingReturnVar: | ||||
2185 | case DeclaratorContext::Association: | ||||
2186 | return false; | ||||
2187 | } | ||||
2188 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2188); | ||||
2189 | } | ||||
2190 | |||||
2191 | /// mayBeFollowedByCXXDirectInit - Return true if the declarator can be | ||||
2192 | /// followed by a C++ direct initializer, e.g. "int x(1);". | ||||
2193 | bool mayBeFollowedByCXXDirectInit() const { | ||||
2194 | if (hasGroupingParens()) return false; | ||||
2195 | |||||
2196 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||
2197 | return false; | ||||
2198 | |||||
2199 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern && | ||||
2200 | Context != DeclaratorContext::File) | ||||
2201 | return false; | ||||
2202 | |||||
2203 | // Special names can't have direct initializers. | ||||
2204 | if (Name.getKind() != UnqualifiedIdKind::IK_Identifier) | ||||
2205 | return false; | ||||
2206 | |||||
2207 | switch (Context) { | ||||
2208 | case DeclaratorContext::File: | ||||
2209 | case DeclaratorContext::Block: | ||||
2210 | case DeclaratorContext::ForInit: | ||||
2211 | case DeclaratorContext::SelectionInit: | ||||
2212 | case DeclaratorContext::TrailingReturnVar: | ||||
2213 | return true; | ||||
2214 | |||||
2215 | case DeclaratorContext::Condition: | ||||
2216 | // This may not be followed by a direct initializer, but it can't be a | ||||
2217 | // function declaration either, and we'd prefer to perform a tentative | ||||
2218 | // parse in order to produce the right diagnostic. | ||||
2219 | return true; | ||||
2220 | |||||
2221 | case DeclaratorContext::KNRTypeList: | ||||
2222 | case DeclaratorContext::Member: | ||||
2223 | case DeclaratorContext::Prototype: | ||||
2224 | case DeclaratorContext::LambdaExprParameter: | ||||
2225 | case DeclaratorContext::ObjCParameter: | ||||
2226 | case DeclaratorContext::ObjCResult: | ||||
2227 | case DeclaratorContext::TemplateParam: | ||||
2228 | case DeclaratorContext::CXXCatch: | ||||
2229 | case DeclaratorContext::ObjCCatch: | ||||
2230 | case DeclaratorContext::TypeName: | ||||
2231 | case DeclaratorContext::FunctionalCast: // FIXME | ||||
2232 | case DeclaratorContext::CXXNew: | ||||
2233 | case DeclaratorContext::AliasDecl: | ||||
2234 | case DeclaratorContext::AliasTemplate: | ||||
2235 | case DeclaratorContext::BlockLiteral: | ||||
2236 | case DeclaratorContext::LambdaExpr: | ||||
2237 | case DeclaratorContext::ConversionId: | ||||
2238 | case DeclaratorContext::TemplateArg: | ||||
2239 | case DeclaratorContext::TemplateTypeArg: | ||||
2240 | case DeclaratorContext::TrailingReturn: | ||||
2241 | case DeclaratorContext::RequiresExpr: | ||||
2242 | case DeclaratorContext::Association: | ||||
2243 | return false; | ||||
2244 | } | ||||
2245 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2245); | ||||
2246 | } | ||||
2247 | |||||
2248 | /// isPastIdentifier - Return true if we have parsed beyond the point where | ||||
2249 | /// the name would appear. (This may happen even if we haven't actually parsed | ||||
2250 | /// a name, perhaps because this context doesn't require one.) | ||||
2251 | bool isPastIdentifier() const { return Name.isValid(); } | ||||
2252 | |||||
2253 | /// hasName - Whether this declarator has a name, which might be an | ||||
2254 | /// identifier (accessible via getIdentifier()) or some kind of | ||||
2255 | /// special C++ name (constructor, destructor, etc.), or a structured | ||||
2256 | /// binding (which is not exactly a name, but occupies the same position). | ||||
2257 | bool hasName() const { | ||||
2258 | return Name.getKind() != UnqualifiedIdKind::IK_Identifier || | ||||
2259 | Name.Identifier || isDecompositionDeclarator(); | ||||
2260 | } | ||||
2261 | |||||
2262 | /// Return whether this declarator is a decomposition declarator. | ||||
2263 | bool isDecompositionDeclarator() const { | ||||
2264 | return BindingGroup.isSet(); | ||||
2265 | } | ||||
2266 | |||||
2267 | IdentifierInfo *getIdentifier() const { | ||||
2268 | if (Name.getKind() == UnqualifiedIdKind::IK_Identifier) | ||||
2269 | return Name.Identifier; | ||||
2270 | |||||
2271 | return nullptr; | ||||
2272 | } | ||||
2273 | SourceLocation getIdentifierLoc() const { return Name.StartLocation; } | ||||
2274 | |||||
2275 | /// Set the name of this declarator to be the given identifier. | ||||
2276 | void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc) { | ||||
2277 | Name.setIdentifier(Id, IdLoc); | ||||
2278 | } | ||||
2279 | |||||
2280 | /// Set the decomposition bindings for this declarator. | ||||
2281 | void | ||||
2282 | setDecompositionBindings(SourceLocation LSquareLoc, | ||||
2283 | ArrayRef<DecompositionDeclarator::Binding> Bindings, | ||||
2284 | SourceLocation RSquareLoc); | ||||
2285 | |||||
2286 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to | ||||
2287 | /// EndLoc, which should be the last token of the chunk. | ||||
2288 | /// This function takes attrs by R-Value reference because it takes ownership | ||||
2289 | /// of those attributes from the parameter. | ||||
2290 | void AddTypeInfo(const DeclaratorChunk &TI, ParsedAttributes &&attrs, | ||||
2291 | SourceLocation EndLoc) { | ||||
2292 | DeclTypeInfo.push_back(TI); | ||||
2293 | DeclTypeInfo.back().getAttrs().addAll(attrs.begin(), attrs.end()); | ||||
2294 | getAttributePool().takeAllFrom(attrs.getPool()); | ||||
2295 | |||||
2296 | if (!EndLoc.isInvalid()) | ||||
2297 | SetRangeEnd(EndLoc); | ||||
2298 | } | ||||
2299 | |||||
2300 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to | ||||
2301 | /// EndLoc, which should be the last token of the chunk. | ||||
2302 | void AddTypeInfo(const DeclaratorChunk &TI, SourceLocation EndLoc) { | ||||
2303 | DeclTypeInfo.push_back(TI); | ||||
2304 | |||||
2305 | if (!EndLoc.isInvalid()) | ||||
2306 | SetRangeEnd(EndLoc); | ||||
2307 | } | ||||
2308 | |||||
2309 | /// Add a new innermost chunk to this declarator. | ||||
2310 | void AddInnermostTypeInfo(const DeclaratorChunk &TI) { | ||||
2311 | DeclTypeInfo.insert(DeclTypeInfo.begin(), TI); | ||||
2312 | } | ||||
2313 | |||||
2314 | /// Return the number of types applied to this declarator. | ||||
2315 | unsigned getNumTypeObjects() const { return DeclTypeInfo.size(); } | ||||
2316 | |||||
2317 | /// Return the specified TypeInfo from this declarator. TypeInfo #0 is | ||||
2318 | /// closest to the identifier. | ||||
2319 | const DeclaratorChunk &getTypeObject(unsigned i) const { | ||||
2320 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "clang/include/clang/Sema/DeclSpec.h", 2320, __extension__ __PRETTY_FUNCTION__ )); | ||||
2321 | return DeclTypeInfo[i]; | ||||
2322 | } | ||||
2323 | DeclaratorChunk &getTypeObject(unsigned i) { | ||||
2324 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "clang/include/clang/Sema/DeclSpec.h", 2324, __extension__ __PRETTY_FUNCTION__ )); | ||||
2325 | return DeclTypeInfo[i]; | ||||
2326 | } | ||||
2327 | |||||
2328 | typedef SmallVectorImpl<DeclaratorChunk>::const_iterator type_object_iterator; | ||||
2329 | typedef llvm::iterator_range<type_object_iterator> type_object_range; | ||||
2330 | |||||
2331 | /// Returns the range of type objects, from the identifier outwards. | ||||
2332 | type_object_range type_objects() const { | ||||
2333 | return type_object_range(DeclTypeInfo.begin(), DeclTypeInfo.end()); | ||||
2334 | } | ||||
2335 | |||||
2336 | void DropFirstTypeObject() { | ||||
2337 | assert(!DeclTypeInfo.empty() && "No type chunks to drop.")(static_cast <bool> (!DeclTypeInfo.empty() && "No type chunks to drop." ) ? void (0) : __assert_fail ("!DeclTypeInfo.empty() && \"No type chunks to drop.\"" , "clang/include/clang/Sema/DeclSpec.h", 2337, __extension__ __PRETTY_FUNCTION__ )); | ||||
2338 | DeclTypeInfo.front().destroy(); | ||||
2339 | DeclTypeInfo.erase(DeclTypeInfo.begin()); | ||||
2340 | } | ||||
2341 | |||||
2342 | /// Return the innermost (closest to the declarator) chunk of this | ||||
2343 | /// declarator that is not a parens chunk, or null if there are no | ||||
2344 | /// non-parens chunks. | ||||
2345 | const DeclaratorChunk *getInnermostNonParenChunk() const { | ||||
2346 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { | ||||
2347 | if (!DeclTypeInfo[i].isParen()) | ||||
2348 | return &DeclTypeInfo[i]; | ||||
2349 | } | ||||
2350 | return nullptr; | ||||
2351 | } | ||||
2352 | |||||
2353 | /// Return the outermost (furthest from the declarator) chunk of | ||||
2354 | /// this declarator that is not a parens chunk, or null if there are | ||||
2355 | /// no non-parens chunks. | ||||
2356 | const DeclaratorChunk *getOutermostNonParenChunk() const { | ||||
2357 | for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) { | ||||
2358 | if (!DeclTypeInfo[i-1].isParen()) | ||||
2359 | return &DeclTypeInfo[i-1]; | ||||
2360 | } | ||||
2361 | return nullptr; | ||||
2362 | } | ||||
2363 | |||||
2364 | /// isArrayOfUnknownBound - This method returns true if the declarator | ||||
2365 | /// is a declarator for an array of unknown bound (looking through | ||||
2366 | /// parentheses). | ||||
2367 | bool isArrayOfUnknownBound() const { | ||||
2368 | const DeclaratorChunk *chunk = getInnermostNonParenChunk(); | ||||
2369 | return (chunk && chunk->Kind == DeclaratorChunk::Array && | ||||
2370 | !chunk->Arr.NumElts); | ||||
2371 | } | ||||
2372 | |||||
2373 | /// isFunctionDeclarator - This method returns true if the declarator | ||||
2374 | /// is a function declarator (looking through parentheses). | ||||
2375 | /// If true is returned, then the reference type parameter idx is | ||||
2376 | /// assigned with the index of the declaration chunk. | ||||
2377 | bool isFunctionDeclarator(unsigned& idx) const { | ||||
2378 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i
| ||||
2379 | switch (DeclTypeInfo[i].Kind) { | ||||
2380 | case DeclaratorChunk::Function: | ||||
2381 | idx = i; | ||||
2382 | return true; | ||||
2383 | case DeclaratorChunk::Paren: | ||||
2384 | continue; | ||||
2385 | case DeclaratorChunk::Pointer: | ||||
2386 | case DeclaratorChunk::Reference: | ||||
2387 | case DeclaratorChunk::Array: | ||||
2388 | case DeclaratorChunk::BlockPointer: | ||||
2389 | case DeclaratorChunk::MemberPointer: | ||||
2390 | case DeclaratorChunk::Pipe: | ||||
2391 | return false; | ||||
2392 | } | ||||
2393 | llvm_unreachable("Invalid type chunk")::llvm::llvm_unreachable_internal("Invalid type chunk", "clang/include/clang/Sema/DeclSpec.h" , 2393); | ||||
2394 | } | ||||
2395 | return false; | ||||
2396 | } | ||||
2397 | |||||
2398 | /// isFunctionDeclarator - Once this declarator is fully parsed and formed, | ||||
2399 | /// this method returns true if the identifier is a function declarator | ||||
2400 | /// (looking through parentheses). | ||||
2401 | bool isFunctionDeclarator() const { | ||||
2402 | unsigned index; | ||||
2403 | return isFunctionDeclarator(index); | ||||
2404 | } | ||||
2405 | |||||
2406 | /// getFunctionTypeInfo - Retrieves the function type info object | ||||
2407 | /// (looking through parentheses). | ||||
2408 | DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() { | ||||
2409 | assert(isFunctionDeclarator() && "Not a function declarator!")(static_cast <bool> (isFunctionDeclarator() && "Not a function declarator!" ) ? void (0) : __assert_fail ("isFunctionDeclarator() && \"Not a function declarator!\"" , "clang/include/clang/Sema/DeclSpec.h", 2409, __extension__ __PRETTY_FUNCTION__ )); | ||||
2410 | unsigned index = 0; | ||||
2411 | isFunctionDeclarator(index); | ||||
2412 | return DeclTypeInfo[index].Fun; | ||||
2413 | } | ||||
2414 | |||||
2415 | /// getFunctionTypeInfo - Retrieves the function type info object | ||||
2416 | /// (looking through parentheses). | ||||
2417 | const DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() const { | ||||
2418 | return const_cast<Declarator*>(this)->getFunctionTypeInfo(); | ||||
2419 | } | ||||
2420 | |||||
2421 | /// Determine whether the declaration that will be produced from | ||||
2422 | /// this declaration will be a function. | ||||
2423 | /// | ||||
2424 | /// A declaration can declare a function even if the declarator itself | ||||
2425 | /// isn't a function declarator, if the type specifier refers to a function | ||||
2426 | /// type. This routine checks for both cases. | ||||
2427 | bool isDeclarationOfFunction() const; | ||||
2428 | |||||
2429 | /// Return true if this declaration appears in a context where a | ||||
2430 | /// function declarator would be a function declaration. | ||||
2431 | bool isFunctionDeclarationContext() const { | ||||
2432 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||
2433 | return false; | ||||
2434 | |||||
2435 | switch (Context) { | ||||
2436 | case DeclaratorContext::File: | ||||
2437 | case DeclaratorContext::Member: | ||||
2438 | case DeclaratorContext::Block: | ||||
2439 | case DeclaratorContext::ForInit: | ||||
2440 | case DeclaratorContext::SelectionInit: | ||||
2441 | return true; | ||||
2442 | |||||
2443 | case DeclaratorContext::Condition: | ||||
2444 | case DeclaratorContext::KNRTypeList: | ||||
2445 | case DeclaratorContext::TypeName: | ||||
2446 | case DeclaratorContext::FunctionalCast: | ||||
2447 | case DeclaratorContext::AliasDecl: | ||||
2448 | case DeclaratorContext::AliasTemplate: | ||||
2449 | case DeclaratorContext::Prototype: | ||||
2450 | case DeclaratorContext::LambdaExprParameter: | ||||
2451 | case DeclaratorContext::ObjCParameter: | ||||
2452 | case DeclaratorContext::ObjCResult: | ||||
2453 | case DeclaratorContext::TemplateParam: | ||||
2454 | case DeclaratorContext::CXXNew: | ||||
2455 | case DeclaratorContext::CXXCatch: | ||||
2456 | case DeclaratorContext::ObjCCatch: | ||||
2457 | case DeclaratorContext::BlockLiteral: | ||||
2458 | case DeclaratorContext::LambdaExpr: | ||||
2459 | case DeclaratorContext::ConversionId: | ||||
2460 | case DeclaratorContext::TemplateArg: | ||||
2461 | case DeclaratorContext::TemplateTypeArg: | ||||
2462 | case DeclaratorContext::TrailingReturn: | ||||
2463 | case DeclaratorContext::TrailingReturnVar: | ||||
2464 | case DeclaratorContext::RequiresExpr: | ||||
2465 | case DeclaratorContext::Association: | ||||
2466 | return false; | ||||
2467 | } | ||||
2468 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2468); | ||||
2469 | } | ||||
2470 | |||||
2471 | /// Determine whether this declaration appears in a context where an | ||||
2472 | /// expression could appear. | ||||
2473 | bool isExpressionContext() const { | ||||
2474 | switch (Context) { | ||||
2475 | case DeclaratorContext::File: | ||||
2476 | case DeclaratorContext::KNRTypeList: | ||||
2477 | case DeclaratorContext::Member: | ||||
2478 | |||||
2479 | // FIXME: sizeof(...) permits an expression. | ||||
2480 | case DeclaratorContext::TypeName: | ||||
2481 | |||||
2482 | case DeclaratorContext::FunctionalCast: | ||||
2483 | case DeclaratorContext::AliasDecl: | ||||
2484 | case DeclaratorContext::AliasTemplate: | ||||
2485 | case DeclaratorContext::Prototype: | ||||
2486 | case DeclaratorContext::LambdaExprParameter: | ||||
2487 | case DeclaratorContext::ObjCParameter: | ||||
2488 | case DeclaratorContext::ObjCResult: | ||||
2489 | case DeclaratorContext::TemplateParam: | ||||
2490 | case DeclaratorContext::CXXNew: | ||||
2491 | case DeclaratorContext::CXXCatch: | ||||
2492 | case DeclaratorContext::ObjCCatch: | ||||
2493 | case DeclaratorContext::BlockLiteral: | ||||
2494 | case DeclaratorContext::LambdaExpr: | ||||
2495 | case DeclaratorContext::ConversionId: | ||||
2496 | case DeclaratorContext::TrailingReturn: | ||||
2497 | case DeclaratorContext::TrailingReturnVar: | ||||
2498 | case DeclaratorContext::TemplateTypeArg: | ||||
2499 | case DeclaratorContext::RequiresExpr: | ||||
2500 | case DeclaratorContext::Association: | ||||
2501 | return false; | ||||
2502 | |||||
2503 | case DeclaratorContext::Block: | ||||
2504 | case DeclaratorContext::ForInit: | ||||
2505 | case DeclaratorContext::SelectionInit: | ||||
2506 | case DeclaratorContext::Condition: | ||||
2507 | case DeclaratorContext::TemplateArg: | ||||
2508 | return true; | ||||
2509 | } | ||||
2510 | |||||
2511 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "clang/include/clang/Sema/DeclSpec.h" , 2511); | ||||
2512 | } | ||||
2513 | |||||
2514 | /// Return true if a function declarator at this position would be a | ||||
2515 | /// function declaration. | ||||
2516 | bool isFunctionDeclaratorAFunctionDeclaration() const { | ||||
2517 | if (!isFunctionDeclarationContext()) | ||||
2518 | return false; | ||||
2519 | |||||
2520 | for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I) | ||||
2521 | if (getTypeObject(I).Kind != DeclaratorChunk::Paren) | ||||
2522 | return false; | ||||
2523 | |||||
2524 | return true; | ||||
2525 | } | ||||
2526 | |||||
2527 | /// Determine whether a trailing return type was written (at any | ||||
2528 | /// level) within this declarator. | ||||
2529 | bool hasTrailingReturnType() const { | ||||
2530 | for (const auto &Chunk : type_objects()) | ||||
2531 | if (Chunk.Kind == DeclaratorChunk::Function && | ||||
2532 | Chunk.Fun.hasTrailingReturnType()) | ||||
2533 | return true; | ||||
2534 | return false; | ||||
2535 | } | ||||
2536 | /// Get the trailing return type appearing (at any level) within this | ||||
2537 | /// declarator. | ||||
2538 | ParsedType getTrailingReturnType() const { | ||||
2539 | for (const auto &Chunk : type_objects()) | ||||
2540 | if (Chunk.Kind == DeclaratorChunk::Function && | ||||
2541 | Chunk.Fun.hasTrailingReturnType()) | ||||
2542 | return Chunk.Fun.getTrailingReturnType(); | ||||
2543 | return ParsedType(); | ||||
2544 | } | ||||
2545 | |||||
2546 | /// \brief Sets a trailing requires clause for this declarator. | ||||
2547 | void setTrailingRequiresClause(Expr *TRC) { | ||||
2548 | TrailingRequiresClause = TRC; | ||||
2549 | |||||
2550 | SetRangeEnd(TRC->getEndLoc()); | ||||
2551 | } | ||||
2552 | |||||
2553 | /// \brief Sets a trailing requires clause for this declarator. | ||||
2554 | Expr *getTrailingRequiresClause() { | ||||
2555 | return TrailingRequiresClause; | ||||
2556 | } | ||||
2557 | |||||
2558 | /// \brief Determine whether a trailing requires clause was written in this | ||||
2559 | /// declarator. | ||||
2560 | bool hasTrailingRequiresClause() const { | ||||
2561 | return TrailingRequiresClause != nullptr; | ||||
2562 | } | ||||
2563 | |||||
2564 | /// Sets the template parameter lists that preceded the declarator. | ||||
2565 | void setTemplateParameterLists(ArrayRef<TemplateParameterList *> TPLs) { | ||||
2566 | TemplateParameterLists = TPLs; | ||||
2567 | } | ||||
2568 | |||||
2569 | /// The template parameter lists that preceded the declarator. | ||||
2570 | ArrayRef<TemplateParameterList *> getTemplateParameterLists() const { | ||||
2571 | return TemplateParameterLists; | ||||
2572 | } | ||||
2573 | |||||
2574 | /// Sets the template parameter list generated from the explicit template | ||||
2575 | /// parameters along with any invented template parameters from | ||||
2576 | /// placeholder-typed parameters. | ||||
2577 | void setInventedTemplateParameterList(TemplateParameterList *Invented) { | ||||
2578 | InventedTemplateParameterList = Invented; | ||||
2579 | } | ||||
2580 | |||||
2581 | /// The template parameter list generated from the explicit template | ||||
2582 | /// parameters along with any invented template parameters from | ||||
2583 | /// placeholder-typed parameters, if there were any such parameters. | ||||
2584 | TemplateParameterList * getInventedTemplateParameterList() const { | ||||
2585 | return InventedTemplateParameterList; | ||||
2586 | } | ||||
2587 | |||||
2588 | /// takeAttributes - Takes attributes from the given parsed-attributes | ||||
2589 | /// set and add them to this declarator. | ||||
2590 | /// | ||||
2591 | /// These examples both add 3 attributes to "var": | ||||
2592 | /// short int var __attribute__((aligned(16),common,deprecated)); | ||||
2593 | /// short int x, __attribute__((aligned(16)) var | ||||
2594 | /// __attribute__((common,deprecated)); | ||||
2595 | /// | ||||
2596 | /// Also extends the range of the declarator. | ||||
2597 | void takeAttributes(ParsedAttributes &attrs) { | ||||
2598 | Attrs.takeAllFrom(attrs); | ||||
2599 | |||||
2600 | if (attrs.Range.getEnd().isValid()) | ||||
2601 | SetRangeEnd(attrs.Range.getEnd()); | ||||
2602 | } | ||||
2603 | |||||
2604 | const ParsedAttributes &getAttributes() const { return Attrs; } | ||||
2605 | ParsedAttributes &getAttributes() { return Attrs; } | ||||
2606 | |||||
2607 | const ParsedAttributesView &getDeclarationAttributes() const { | ||||
2608 | return DeclarationAttrs; | ||||
2609 | } | ||||
2610 | |||||
2611 | /// hasAttributes - do we contain any attributes? | ||||
2612 | bool hasAttributes() const { | ||||
2613 | if (!getAttributes().empty() || !getDeclarationAttributes().empty() || | ||||
2614 | getDeclSpec().hasAttributes()) | ||||
2615 | return true; | ||||
2616 | for (unsigned i = 0, e = getNumTypeObjects(); i != e; ++i) | ||||
2617 | if (!getTypeObject(i).getAttrs().empty()) | ||||
2618 | return true; | ||||
2619 | return false; | ||||
2620 | } | ||||
2621 | |||||
2622 | /// Return a source range list of C++11 attributes associated | ||||
2623 | /// with the declarator. | ||||
2624 | void getCXX11AttributeRanges(SmallVectorImpl<SourceRange> &Ranges) { | ||||
2625 | for (const ParsedAttr &AL : Attrs) | ||||
2626 | if (AL.isCXX11Attribute()) | ||||
2627 | Ranges.push_back(AL.getRange()); | ||||
2628 | } | ||||
2629 | |||||
2630 | void setAsmLabel(Expr *E) { AsmLabel = E; } | ||||
2631 | Expr *getAsmLabel() const { return AsmLabel; } | ||||
2632 | |||||
2633 | void setExtension(bool Val = true) { Extension = Val; } | ||||
2634 | bool getExtension() const { return Extension; } | ||||
2635 | |||||
2636 | void setObjCIvar(bool Val = true) { ObjCIvar = Val; } | ||||
2637 | bool isObjCIvar() const { return ObjCIvar; } | ||||
2638 | |||||
2639 | void setObjCWeakProperty(bool Val = true) { ObjCWeakProperty = Val; } | ||||
2640 | bool isObjCWeakProperty() const { return ObjCWeakProperty; } | ||||
2641 | |||||
2642 | void setInvalidType(bool Val = true) { InvalidType = Val; } | ||||
2643 | bool isInvalidType() const { | ||||
2644 | return InvalidType || DS.getTypeSpecType() == DeclSpec::TST_error; | ||||
2645 | } | ||||
2646 | |||||
2647 | void setGroupingParens(bool flag) { GroupingParens = flag; } | ||||
2648 | bool hasGroupingParens() const { return GroupingParens; } | ||||
2649 | |||||
2650 | bool isFirstDeclarator() const { return !CommaLoc.isValid(); } | ||||
2651 | SourceLocation getCommaLoc() const { return CommaLoc; } | ||||
2652 | void setCommaLoc(SourceLocation CL) { CommaLoc = CL; } | ||||
2653 | |||||
2654 | bool hasEllipsis() const { return EllipsisLoc.isValid(); } | ||||
2655 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } | ||||
2656 | void setEllipsisLoc(SourceLocation EL) { EllipsisLoc = EL; } | ||||
2657 | |||||
2658 | void setFunctionDefinitionKind(FunctionDefinitionKind Val) { | ||||
2659 | FunctionDefinition = static_cast<unsigned>(Val); | ||||
2660 | } | ||||
2661 | |||||
2662 | bool isFunctionDefinition() const { | ||||
2663 | return getFunctionDefinitionKind() != FunctionDefinitionKind::Declaration; | ||||
2664 | } | ||||
2665 | |||||
2666 | FunctionDefinitionKind getFunctionDefinitionKind() const { | ||||
2667 | return (FunctionDefinitionKind)FunctionDefinition; | ||||
2668 | } | ||||
2669 | |||||
2670 | void setHasInitializer(bool Val = true) { HasInitializer = Val; } | ||||
2671 | bool hasInitializer() const { return HasInitializer; } | ||||
2672 | |||||
2673 | /// Returns true if this declares a real member and not a friend. | ||||
2674 | bool isFirstDeclarationOfMember() { | ||||
2675 | return getContext() == DeclaratorContext::Member && | ||||
2676 | !getDeclSpec().isFriendSpecified(); | ||||
2677 | } | ||||
2678 | |||||
2679 | /// Returns true if this declares a static member. This cannot be called on a | ||||
2680 | /// declarator outside of a MemberContext because we won't know until | ||||
2681 | /// redeclaration time if the decl is static. | ||||
2682 | bool isStaticMember(); | ||||
2683 | |||||
2684 | /// Returns true if this declares a constructor or a destructor. | ||||
2685 | bool isCtorOrDtor(); | ||||
2686 | |||||
2687 | void setRedeclaration(bool Val) { Redeclaration = Val; } | ||||
2688 | bool isRedeclaration() const { return Redeclaration; } | ||||
2689 | }; | ||||
2690 | |||||
2691 | /// This little struct is used to capture information about | ||||
2692 | /// structure field declarators, which is basically just a bitfield size. | ||||
2693 | struct FieldDeclarator { | ||||
2694 | Declarator D; | ||||
2695 | Expr *BitfieldSize; | ||||
2696 | explicit FieldDeclarator(const DeclSpec &DS, | ||||
2697 | const ParsedAttributes &DeclarationAttrs) | ||||
2698 | : D(DS, DeclarationAttrs, DeclaratorContext::Member), | ||||
2699 | BitfieldSize(nullptr) {} | ||||
2700 | }; | ||||
2701 | |||||
2702 | /// Represents a C++11 virt-specifier-seq. | ||||
2703 | class VirtSpecifiers { | ||||
2704 | public: | ||||
2705 | enum Specifier { | ||||
2706 | VS_None = 0, | ||||
2707 | VS_Override = 1, | ||||
2708 | VS_Final = 2, | ||||
2709 | VS_Sealed = 4, | ||||
2710 | // Represents the __final keyword, which is legal for gcc in pre-C++11 mode. | ||||
2711 | VS_GNU_Final = 8, | ||||
2712 | VS_Abstract = 16 | ||||
2713 | }; | ||||
2714 | |||||
2715 | VirtSpecifiers() : Specifiers(0), LastSpecifier(VS_None) { } | ||||
2716 | |||||
2717 | bool SetSpecifier(Specifier VS, SourceLocation Loc, | ||||
2718 | const char *&PrevSpec); | ||||
2719 | |||||
2720 | bool isUnset() const { return Specifiers == 0; } | ||||
2721 | |||||
2722 | bool isOverrideSpecified() const { return Specifiers & VS_Override; } | ||||
2723 | SourceLocation getOverrideLoc() const { return VS_overrideLoc; } | ||||
2724 | |||||
2725 | bool isFinalSpecified() const { return Specifiers & (VS_Final | VS_Sealed | VS_GNU_Final); } | ||||
2726 | bool isFinalSpelledSealed() const { return Specifiers & VS_Sealed; } | ||||
2727 | SourceLocation getFinalLoc() const { return VS_finalLoc; } | ||||
2728 | SourceLocation getAbstractLoc() const { return VS_abstractLoc; } | ||||
2729 | |||||
2730 | void clear() { Specifiers = 0; } | ||||
2731 | |||||
2732 | static const char *getSpecifierName(Specifier VS); | ||||
2733 | |||||
2734 | SourceLocation getFirstLocation() const { return FirstLocation; } | ||||
2735 | SourceLocation getLastLocation() const { return LastLocation; } | ||||
2736 | Specifier getLastSpecifier() const { return LastSpecifier; } | ||||
2737 | |||||
2738 | private: | ||||
2739 | unsigned Specifiers; | ||||
2740 | Specifier LastSpecifier; | ||||
2741 | |||||
2742 | SourceLocation VS_overrideLoc, VS_finalLoc, VS_abstractLoc; | ||||
2743 | SourceLocation FirstLocation; | ||||
2744 | SourceLocation LastLocation; | ||||
2745 | }; | ||||
2746 | |||||
2747 | enum class LambdaCaptureInitKind { | ||||
2748 | NoInit, //!< [a] | ||||
2749 | CopyInit, //!< [a = b], [a = {b}] | ||||
2750 | DirectInit, //!< [a(b)] | ||||
2751 | ListInit //!< [a{b}] | ||||
2752 | }; | ||||
2753 | |||||
2754 | /// Represents a complete lambda introducer. | ||||
2755 | struct LambdaIntroducer { | ||||
2756 | /// An individual capture in a lambda introducer. | ||||
2757 | struct LambdaCapture { | ||||
2758 | LambdaCaptureKind Kind; | ||||
2759 | SourceLocation Loc; | ||||
2760 | IdentifierInfo *Id; | ||||
2761 | SourceLocation EllipsisLoc; | ||||
2762 | LambdaCaptureInitKind InitKind; | ||||
2763 | ExprResult Init; | ||||
2764 | ParsedType InitCaptureType; | ||||
2765 | SourceRange ExplicitRange; | ||||
2766 | |||||
2767 | LambdaCapture(LambdaCaptureKind Kind, SourceLocation Loc, | ||||
2768 | IdentifierInfo *Id, SourceLocation EllipsisLoc, | ||||
2769 | LambdaCaptureInitKind InitKind, ExprResult Init, | ||||
2770 | ParsedType InitCaptureType, | ||||
2771 | SourceRange ExplicitRange) | ||||
2772 | : Kind(Kind), Loc(Loc), Id(Id), EllipsisLoc(EllipsisLoc), | ||||
2773 | InitKind(InitKind), Init(Init), InitCaptureType(InitCaptureType), | ||||
2774 | ExplicitRange(ExplicitRange) {} | ||||
2775 | }; | ||||
2776 | |||||
2777 | SourceRange Range; | ||||
2778 | SourceLocation DefaultLoc; | ||||
2779 | LambdaCaptureDefault Default; | ||||
2780 | SmallVector<LambdaCapture, 4> Captures; | ||||
2781 | |||||
2782 | LambdaIntroducer() | ||||
2783 | : Default(LCD_None) {} | ||||
2784 | |||||
2785 | bool hasLambdaCapture() const { | ||||
2786 | return Captures.size() > 0 || Default != LCD_None; | ||||
2787 | } | ||||
2788 | |||||
2789 | /// Append a capture in a lambda introducer. | ||||
2790 | void addCapture(LambdaCaptureKind Kind, | ||||
2791 | SourceLocation Loc, | ||||
2792 | IdentifierInfo* Id, | ||||
2793 | SourceLocation EllipsisLoc, | ||||
2794 | LambdaCaptureInitKind InitKind, | ||||
2795 | ExprResult Init, | ||||
2796 | ParsedType InitCaptureType, | ||||
2797 | SourceRange ExplicitRange) { | ||||
2798 | Captures.push_back(LambdaCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init, | ||||
2799 | InitCaptureType, ExplicitRange)); | ||||
2800 | } | ||||
2801 | }; | ||||
2802 | |||||
2803 | struct InventedTemplateParameterInfo { | ||||
2804 | /// The number of parameters in the template parameter list that were | ||||
2805 | /// explicitly specified by the user, as opposed to being invented by use | ||||
2806 | /// of an auto parameter. | ||||
2807 | unsigned NumExplicitTemplateParams = 0; | ||||
2808 | |||||
2809 | /// If this is a generic lambda or abbreviated function template, use this | ||||
2810 | /// as the depth of each 'auto' parameter, during initial AST construction. | ||||
2811 | unsigned AutoTemplateParameterDepth = 0; | ||||
2812 | |||||
2813 | /// Store the list of the template parameters for a generic lambda or an | ||||
2814 | /// abbreviated function template. | ||||
2815 | /// If this is a generic lambda or abbreviated function template, this holds | ||||
2816 | /// the explicit template parameters followed by the auto parameters | ||||
2817 | /// converted into TemplateTypeParmDecls. | ||||
2818 | /// It can be used to construct the generic lambda or abbreviated template's | ||||
2819 | /// template parameter list during initial AST construction. | ||||
2820 | SmallVector<NamedDecl*, 4> TemplateParams; | ||||
2821 | }; | ||||
2822 | |||||
2823 | } // end namespace clang | ||||
2824 | |||||
2825 | #endif // LLVM_CLANG_SEMA_DECLSPEC_H |