File: | clang/lib/Sema/SemaTemplateInstantiateDecl.cpp |
Warning: | line 436, column 9 Value stored to 'E' during its initialization is never read |
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1 | //===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/ |
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 | // This file implements C++ template instantiation for declarations. |
9 | // |
10 | //===----------------------------------------------------------------------===/ |
11 | |
12 | #include "clang/AST/ASTConsumer.h" |
13 | #include "clang/AST/ASTContext.h" |
14 | #include "clang/AST/ASTMutationListener.h" |
15 | #include "clang/AST/DeclTemplate.h" |
16 | #include "clang/AST/DeclVisitor.h" |
17 | #include "clang/AST/DependentDiagnostic.h" |
18 | #include "clang/AST/Expr.h" |
19 | #include "clang/AST/ExprCXX.h" |
20 | #include "clang/AST/PrettyDeclStackTrace.h" |
21 | #include "clang/AST/TypeLoc.h" |
22 | #include "clang/Basic/SourceManager.h" |
23 | #include "clang/Basic/TargetInfo.h" |
24 | #include "clang/Sema/Initialization.h" |
25 | #include "clang/Sema/Lookup.h" |
26 | #include "clang/Sema/SemaInternal.h" |
27 | #include "clang/Sema/Template.h" |
28 | #include "clang/Sema/TemplateInstCallback.h" |
29 | #include "llvm/Support/TimeProfiler.h" |
30 | |
31 | using namespace clang; |
32 | |
33 | static bool isDeclWithinFunction(const Decl *D) { |
34 | const DeclContext *DC = D->getDeclContext(); |
35 | if (DC->isFunctionOrMethod()) |
36 | return true; |
37 | |
38 | if (DC->isRecord()) |
39 | return cast<CXXRecordDecl>(DC)->isLocalClass(); |
40 | |
41 | return false; |
42 | } |
43 | |
44 | template<typename DeclT> |
45 | static bool SubstQualifier(Sema &SemaRef, const DeclT *OldDecl, DeclT *NewDecl, |
46 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
47 | if (!OldDecl->getQualifierLoc()) |
48 | return false; |
49 | |
50 | assert((NewDecl->getFriendObjectKind() ||(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)) |
51 | !OldDecl->getLexicalDeclContext()->isDependentContext()) &&(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)) |
52 | "non-friend with qualified name defined in dependent context")(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)); |
53 | Sema::ContextRAII SavedContext( |
54 | SemaRef, |
55 | const_cast<DeclContext *>(NewDecl->getFriendObjectKind() |
56 | ? NewDecl->getLexicalDeclContext() |
57 | : OldDecl->getLexicalDeclContext())); |
58 | |
59 | NestedNameSpecifierLoc NewQualifierLoc |
60 | = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(), |
61 | TemplateArgs); |
62 | |
63 | if (!NewQualifierLoc) |
64 | return true; |
65 | |
66 | NewDecl->setQualifierInfo(NewQualifierLoc); |
67 | return false; |
68 | } |
69 | |
70 | bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl, |
71 | DeclaratorDecl *NewDecl) { |
72 | return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs); |
73 | } |
74 | |
75 | bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl, |
76 | TagDecl *NewDecl) { |
77 | return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs); |
78 | } |
79 | |
80 | // Include attribute instantiation code. |
81 | #include "clang/Sema/AttrTemplateInstantiate.inc" |
82 | |
83 | static void instantiateDependentAlignedAttr( |
84 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
85 | const AlignedAttr *Aligned, Decl *New, bool IsPackExpansion) { |
86 | if (Aligned->isAlignmentExpr()) { |
87 | // The alignment expression is a constant expression. |
88 | EnterExpressionEvaluationContext Unevaluated( |
89 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
90 | ExprResult Result = S.SubstExpr(Aligned->getAlignmentExpr(), TemplateArgs); |
91 | if (!Result.isInvalid()) |
92 | S.AddAlignedAttr(New, *Aligned, Result.getAs<Expr>(), IsPackExpansion); |
93 | } else { |
94 | TypeSourceInfo *Result = S.SubstType(Aligned->getAlignmentType(), |
95 | TemplateArgs, Aligned->getLocation(), |
96 | DeclarationName()); |
97 | if (Result) |
98 | S.AddAlignedAttr(New, *Aligned, Result, IsPackExpansion); |
99 | } |
100 | } |
101 | |
102 | static void instantiateDependentAlignedAttr( |
103 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
104 | const AlignedAttr *Aligned, Decl *New) { |
105 | if (!Aligned->isPackExpansion()) { |
106 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false); |
107 | return; |
108 | } |
109 | |
110 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
111 | if (Aligned->isAlignmentExpr()) |
112 | S.collectUnexpandedParameterPacks(Aligned->getAlignmentExpr(), |
113 | Unexpanded); |
114 | else |
115 | S.collectUnexpandedParameterPacks(Aligned->getAlignmentType()->getTypeLoc(), |
116 | Unexpanded); |
117 | assert(!Unexpanded.empty() && "Pack expansion without parameter packs?")((!Unexpanded.empty() && "Pack expansion without parameter packs?" ) ? static_cast<void> (0) : __assert_fail ("!Unexpanded.empty() && \"Pack expansion without parameter packs?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 117, __PRETTY_FUNCTION__)); |
118 | |
119 | // Determine whether we can expand this attribute pack yet. |
120 | bool Expand = true, RetainExpansion = false; |
121 | Optional<unsigned> NumExpansions; |
122 | // FIXME: Use the actual location of the ellipsis. |
123 | SourceLocation EllipsisLoc = Aligned->getLocation(); |
124 | if (S.CheckParameterPacksForExpansion(EllipsisLoc, Aligned->getRange(), |
125 | Unexpanded, TemplateArgs, Expand, |
126 | RetainExpansion, NumExpansions)) |
127 | return; |
128 | |
129 | if (!Expand) { |
130 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, -1); |
131 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, true); |
132 | } else { |
133 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
134 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, I); |
135 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false); |
136 | } |
137 | } |
138 | } |
139 | |
140 | static void instantiateDependentAssumeAlignedAttr( |
141 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
142 | const AssumeAlignedAttr *Aligned, Decl *New) { |
143 | // The alignment expression is a constant expression. |
144 | EnterExpressionEvaluationContext Unevaluated( |
145 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
146 | |
147 | Expr *E, *OE = nullptr; |
148 | ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs); |
149 | if (Result.isInvalid()) |
150 | return; |
151 | E = Result.getAs<Expr>(); |
152 | |
153 | if (Aligned->getOffset()) { |
154 | Result = S.SubstExpr(Aligned->getOffset(), TemplateArgs); |
155 | if (Result.isInvalid()) |
156 | return; |
157 | OE = Result.getAs<Expr>(); |
158 | } |
159 | |
160 | S.AddAssumeAlignedAttr(New, *Aligned, E, OE); |
161 | } |
162 | |
163 | static void instantiateDependentAlignValueAttr( |
164 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
165 | const AlignValueAttr *Aligned, Decl *New) { |
166 | // The alignment expression is a constant expression. |
167 | EnterExpressionEvaluationContext Unevaluated( |
168 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
169 | ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs); |
170 | if (!Result.isInvalid()) |
171 | S.AddAlignValueAttr(New, *Aligned, Result.getAs<Expr>()); |
172 | } |
173 | |
174 | static void instantiateDependentAllocAlignAttr( |
175 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
176 | const AllocAlignAttr *Align, Decl *New) { |
177 | Expr *Param = IntegerLiteral::Create( |
178 | S.getASTContext(), |
179 | llvm::APInt(64, Align->getParamIndex().getSourceIndex()), |
180 | S.getASTContext().UnsignedLongLongTy, Align->getLocation()); |
181 | S.AddAllocAlignAttr(New, *Align, Param); |
182 | } |
183 | |
184 | static void instantiateDependentAnnotationAttr( |
185 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
186 | const AnnotateAttr *Attr, Decl *New) { |
187 | EnterExpressionEvaluationContext Unevaluated( |
188 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
189 | SmallVector<Expr *, 4> Args; |
190 | Args.reserve(Attr->args_size()); |
191 | for (auto *E : Attr->args()) { |
192 | ExprResult Result = S.SubstExpr(E, TemplateArgs); |
193 | if (!Result.isUsable()) |
194 | return; |
195 | Args.push_back(Result.get()); |
196 | } |
197 | S.AddAnnotationAttr(New, *Attr, Attr->getAnnotation(), Args); |
198 | } |
199 | |
200 | static Expr *instantiateDependentFunctionAttrCondition( |
201 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
202 | const Attr *A, Expr *OldCond, const Decl *Tmpl, FunctionDecl *New) { |
203 | Expr *Cond = nullptr; |
204 | { |
205 | Sema::ContextRAII SwitchContext(S, New); |
206 | EnterExpressionEvaluationContext Unevaluated( |
207 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
208 | ExprResult Result = S.SubstExpr(OldCond, TemplateArgs); |
209 | if (Result.isInvalid()) |
210 | return nullptr; |
211 | Cond = Result.getAs<Expr>(); |
212 | } |
213 | if (!Cond->isTypeDependent()) { |
214 | ExprResult Converted = S.PerformContextuallyConvertToBool(Cond); |
215 | if (Converted.isInvalid()) |
216 | return nullptr; |
217 | Cond = Converted.get(); |
218 | } |
219 | |
220 | SmallVector<PartialDiagnosticAt, 8> Diags; |
221 | if (OldCond->isValueDependent() && !Cond->isValueDependent() && |
222 | !Expr::isPotentialConstantExprUnevaluated(Cond, New, Diags)) { |
223 | S.Diag(A->getLocation(), diag::err_attr_cond_never_constant_expr) << A; |
224 | for (const auto &P : Diags) |
225 | S.Diag(P.first, P.second); |
226 | return nullptr; |
227 | } |
228 | return Cond; |
229 | } |
230 | |
231 | static void instantiateDependentEnableIfAttr( |
232 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
233 | const EnableIfAttr *EIA, const Decl *Tmpl, FunctionDecl *New) { |
234 | Expr *Cond = instantiateDependentFunctionAttrCondition( |
235 | S, TemplateArgs, EIA, EIA->getCond(), Tmpl, New); |
236 | |
237 | if (Cond) |
238 | New->addAttr(new (S.getASTContext()) EnableIfAttr(S.getASTContext(), *EIA, |
239 | Cond, EIA->getMessage())); |
240 | } |
241 | |
242 | static void instantiateDependentDiagnoseIfAttr( |
243 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
244 | const DiagnoseIfAttr *DIA, const Decl *Tmpl, FunctionDecl *New) { |
245 | Expr *Cond = instantiateDependentFunctionAttrCondition( |
246 | S, TemplateArgs, DIA, DIA->getCond(), Tmpl, New); |
247 | |
248 | if (Cond) |
249 | New->addAttr(new (S.getASTContext()) DiagnoseIfAttr( |
250 | S.getASTContext(), *DIA, Cond, DIA->getMessage(), |
251 | DIA->getDiagnosticType(), DIA->getArgDependent(), New)); |
252 | } |
253 | |
254 | // Constructs and adds to New a new instance of CUDALaunchBoundsAttr using |
255 | // template A as the base and arguments from TemplateArgs. |
256 | static void instantiateDependentCUDALaunchBoundsAttr( |
257 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
258 | const CUDALaunchBoundsAttr &Attr, Decl *New) { |
259 | // The alignment expression is a constant expression. |
260 | EnterExpressionEvaluationContext Unevaluated( |
261 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
262 | |
263 | ExprResult Result = S.SubstExpr(Attr.getMaxThreads(), TemplateArgs); |
264 | if (Result.isInvalid()) |
265 | return; |
266 | Expr *MaxThreads = Result.getAs<Expr>(); |
267 | |
268 | Expr *MinBlocks = nullptr; |
269 | if (Attr.getMinBlocks()) { |
270 | Result = S.SubstExpr(Attr.getMinBlocks(), TemplateArgs); |
271 | if (Result.isInvalid()) |
272 | return; |
273 | MinBlocks = Result.getAs<Expr>(); |
274 | } |
275 | |
276 | S.AddLaunchBoundsAttr(New, Attr, MaxThreads, MinBlocks); |
277 | } |
278 | |
279 | static void |
280 | instantiateDependentModeAttr(Sema &S, |
281 | const MultiLevelTemplateArgumentList &TemplateArgs, |
282 | const ModeAttr &Attr, Decl *New) { |
283 | S.AddModeAttr(New, Attr, Attr.getMode(), |
284 | /*InInstantiation=*/true); |
285 | } |
286 | |
287 | /// Instantiation of 'declare simd' attribute and its arguments. |
288 | static void instantiateOMPDeclareSimdDeclAttr( |
289 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
290 | const OMPDeclareSimdDeclAttr &Attr, Decl *New) { |
291 | // Allow 'this' in clauses with varlists. |
292 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New)) |
293 | New = FTD->getTemplatedDecl(); |
294 | auto *FD = cast<FunctionDecl>(New); |
295 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext()); |
296 | SmallVector<Expr *, 4> Uniforms, Aligneds, Alignments, Linears, Steps; |
297 | SmallVector<unsigned, 4> LinModifiers; |
298 | |
299 | auto SubstExpr = [&](Expr *E) -> ExprResult { |
300 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) |
301 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) { |
302 | Sema::ContextRAII SavedContext(S, FD); |
303 | LocalInstantiationScope Local(S); |
304 | if (FD->getNumParams() > PVD->getFunctionScopeIndex()) |
305 | Local.InstantiatedLocal( |
306 | PVD, FD->getParamDecl(PVD->getFunctionScopeIndex())); |
307 | return S.SubstExpr(E, TemplateArgs); |
308 | } |
309 | Sema::CXXThisScopeRAII ThisScope(S, ThisContext, Qualifiers(), |
310 | FD->isCXXInstanceMember()); |
311 | return S.SubstExpr(E, TemplateArgs); |
312 | }; |
313 | |
314 | // Substitute a single OpenMP clause, which is a potentially-evaluated |
315 | // full-expression. |
316 | auto Subst = [&](Expr *E) -> ExprResult { |
317 | EnterExpressionEvaluationContext Evaluated( |
318 | S, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
319 | ExprResult Res = SubstExpr(E); |
320 | if (Res.isInvalid()) |
321 | return Res; |
322 | return S.ActOnFinishFullExpr(Res.get(), false); |
323 | }; |
324 | |
325 | ExprResult Simdlen; |
326 | if (auto *E = Attr.getSimdlen()) |
327 | Simdlen = Subst(E); |
328 | |
329 | if (Attr.uniforms_size() > 0) { |
330 | for(auto *E : Attr.uniforms()) { |
331 | ExprResult Inst = Subst(E); |
332 | if (Inst.isInvalid()) |
333 | continue; |
334 | Uniforms.push_back(Inst.get()); |
335 | } |
336 | } |
337 | |
338 | auto AI = Attr.alignments_begin(); |
339 | for (auto *E : Attr.aligneds()) { |
340 | ExprResult Inst = Subst(E); |
341 | if (Inst.isInvalid()) |
342 | continue; |
343 | Aligneds.push_back(Inst.get()); |
344 | Inst = ExprEmpty(); |
345 | if (*AI) |
346 | Inst = S.SubstExpr(*AI, TemplateArgs); |
347 | Alignments.push_back(Inst.get()); |
348 | ++AI; |
349 | } |
350 | |
351 | auto SI = Attr.steps_begin(); |
352 | for (auto *E : Attr.linears()) { |
353 | ExprResult Inst = Subst(E); |
354 | if (Inst.isInvalid()) |
355 | continue; |
356 | Linears.push_back(Inst.get()); |
357 | Inst = ExprEmpty(); |
358 | if (*SI) |
359 | Inst = S.SubstExpr(*SI, TemplateArgs); |
360 | Steps.push_back(Inst.get()); |
361 | ++SI; |
362 | } |
363 | LinModifiers.append(Attr.modifiers_begin(), Attr.modifiers_end()); |
364 | (void)S.ActOnOpenMPDeclareSimdDirective( |
365 | S.ConvertDeclToDeclGroup(New), Attr.getBranchState(), Simdlen.get(), |
366 | Uniforms, Aligneds, Alignments, Linears, LinModifiers, Steps, |
367 | Attr.getRange()); |
368 | } |
369 | |
370 | /// Instantiation of 'declare variant' attribute and its arguments. |
371 | static void instantiateOMPDeclareVariantAttr( |
372 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
373 | const OMPDeclareVariantAttr &Attr, Decl *New) { |
374 | // Allow 'this' in clauses with varlists. |
375 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New)) |
376 | New = FTD->getTemplatedDecl(); |
377 | auto *FD = cast<FunctionDecl>(New); |
378 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext()); |
379 | |
380 | auto &&SubstExpr = [FD, ThisContext, &S, &TemplateArgs](Expr *E) { |
381 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) |
382 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) { |
383 | Sema::ContextRAII SavedContext(S, FD); |
384 | LocalInstantiationScope Local(S); |
385 | if (FD->getNumParams() > PVD->getFunctionScopeIndex()) |
386 | Local.InstantiatedLocal( |
387 | PVD, FD->getParamDecl(PVD->getFunctionScopeIndex())); |
388 | return S.SubstExpr(E, TemplateArgs); |
389 | } |
390 | Sema::CXXThisScopeRAII ThisScope(S, ThisContext, Qualifiers(), |
391 | FD->isCXXInstanceMember()); |
392 | return S.SubstExpr(E, TemplateArgs); |
393 | }; |
394 | |
395 | // Substitute a single OpenMP clause, which is a potentially-evaluated |
396 | // full-expression. |
397 | auto &&Subst = [&SubstExpr, &S](Expr *E) { |
398 | EnterExpressionEvaluationContext Evaluated( |
399 | S, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
400 | ExprResult Res = SubstExpr(E); |
401 | if (Res.isInvalid()) |
402 | return Res; |
403 | return S.ActOnFinishFullExpr(Res.get(), false); |
404 | }; |
405 | |
406 | ExprResult VariantFuncRef; |
407 | if (Expr *E = Attr.getVariantFuncRef()) { |
408 | // Do not mark function as is used to prevent its emission if this is the |
409 | // only place where it is used. |
410 | EnterExpressionEvaluationContext Unevaluated( |
411 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
412 | VariantFuncRef = Subst(E); |
413 | } |
414 | |
415 | // Copy the template version of the OMPTraitInfo and run substitute on all |
416 | // score and condition expressiosn. |
417 | OMPTraitInfo &TI = S.getASTContext().getNewOMPTraitInfo(); |
418 | TI = *Attr.getTraitInfos(); |
419 | |
420 | // Try to substitute template parameters in score and condition expressions. |
421 | auto SubstScoreOrConditionExpr = [&S, Subst](Expr *&E, bool) { |
422 | if (E) { |
423 | EnterExpressionEvaluationContext Unevaluated( |
424 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
425 | ExprResult ER = Subst(E); |
426 | if (ER.isUsable()) |
427 | E = ER.get(); |
428 | else |
429 | return true; |
430 | } |
431 | return false; |
432 | }; |
433 | if (TI.anyScoreOrCondition(SubstScoreOrConditionExpr)) |
434 | return; |
435 | |
436 | Expr *E = VariantFuncRef.get(); |
Value stored to 'E' during its initialization is never read | |
437 | // Check function/variant ref for `omp declare variant` but not for `omp |
438 | // begin declare variant` (which use implicit attributes). |
439 | Optional<std::pair<FunctionDecl *, Expr *>> DeclVarData = |
440 | S.checkOpenMPDeclareVariantFunction(S.ConvertDeclToDeclGroup(New), |
441 | VariantFuncRef.get(), TI, |
442 | Attr.getRange()); |
443 | |
444 | if (!DeclVarData) |
445 | return; |
446 | |
447 | E = DeclVarData.getValue().second; |
448 | FD = DeclVarData.getValue().first; |
449 | |
450 | if (auto *VariantDRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) { |
451 | if (auto *VariantFD = dyn_cast<FunctionDecl>(VariantDRE->getDecl())) { |
452 | if (auto *VariantFTD = VariantFD->getDescribedFunctionTemplate()) { |
453 | if (!VariantFTD->isThisDeclarationADefinition()) |
454 | return; |
455 | Sema::TentativeAnalysisScope Trap(S); |
456 | const TemplateArgumentList *TAL = TemplateArgumentList::CreateCopy( |
457 | S.Context, TemplateArgs.getInnermost()); |
458 | |
459 | auto *SubstFD = S.InstantiateFunctionDeclaration(VariantFTD, TAL, |
460 | New->getLocation()); |
461 | if (!SubstFD) |
462 | return; |
463 | QualType NewType = S.Context.mergeFunctionTypes( |
464 | SubstFD->getType(), FD->getType(), |
465 | /* OfBlockPointer */ false, |
466 | /* Unqualified */ false, /* AllowCXX */ true); |
467 | if (NewType.isNull()) |
468 | return; |
469 | S.InstantiateFunctionDefinition( |
470 | New->getLocation(), SubstFD, /* Recursive */ true, |
471 | /* DefinitionRequired */ false, /* AtEndOfTU */ false); |
472 | SubstFD->setInstantiationIsPending(!SubstFD->isDefined()); |
473 | E = DeclRefExpr::Create(S.Context, NestedNameSpecifierLoc(), |
474 | SourceLocation(), SubstFD, |
475 | /* RefersToEnclosingVariableOrCapture */ false, |
476 | /* NameLoc */ SubstFD->getLocation(), |
477 | SubstFD->getType(), ExprValueKind::VK_RValue); |
478 | } |
479 | } |
480 | } |
481 | |
482 | S.ActOnOpenMPDeclareVariantDirective(FD, E, TI, Attr.getRange()); |
483 | } |
484 | |
485 | static void instantiateDependentAMDGPUFlatWorkGroupSizeAttr( |
486 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
487 | const AMDGPUFlatWorkGroupSizeAttr &Attr, Decl *New) { |
488 | // Both min and max expression are constant expressions. |
489 | EnterExpressionEvaluationContext Unevaluated( |
490 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
491 | |
492 | ExprResult Result = S.SubstExpr(Attr.getMin(), TemplateArgs); |
493 | if (Result.isInvalid()) |
494 | return; |
495 | Expr *MinExpr = Result.getAs<Expr>(); |
496 | |
497 | Result = S.SubstExpr(Attr.getMax(), TemplateArgs); |
498 | if (Result.isInvalid()) |
499 | return; |
500 | Expr *MaxExpr = Result.getAs<Expr>(); |
501 | |
502 | S.addAMDGPUFlatWorkGroupSizeAttr(New, Attr, MinExpr, MaxExpr); |
503 | } |
504 | |
505 | static ExplicitSpecifier |
506 | instantiateExplicitSpecifier(Sema &S, |
507 | const MultiLevelTemplateArgumentList &TemplateArgs, |
508 | ExplicitSpecifier ES, FunctionDecl *New) { |
509 | if (!ES.getExpr()) |
510 | return ES; |
511 | Expr *OldCond = ES.getExpr(); |
512 | Expr *Cond = nullptr; |
513 | { |
514 | EnterExpressionEvaluationContext Unevaluated( |
515 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
516 | ExprResult SubstResult = S.SubstExpr(OldCond, TemplateArgs); |
517 | if (SubstResult.isInvalid()) { |
518 | return ExplicitSpecifier::Invalid(); |
519 | } |
520 | Cond = SubstResult.get(); |
521 | } |
522 | ExplicitSpecifier Result(Cond, ES.getKind()); |
523 | if (!Cond->isTypeDependent()) |
524 | S.tryResolveExplicitSpecifier(Result); |
525 | return Result; |
526 | } |
527 | |
528 | static void instantiateDependentAMDGPUWavesPerEUAttr( |
529 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
530 | const AMDGPUWavesPerEUAttr &Attr, Decl *New) { |
531 | // Both min and max expression are constant expressions. |
532 | EnterExpressionEvaluationContext Unevaluated( |
533 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
534 | |
535 | ExprResult Result = S.SubstExpr(Attr.getMin(), TemplateArgs); |
536 | if (Result.isInvalid()) |
537 | return; |
538 | Expr *MinExpr = Result.getAs<Expr>(); |
539 | |
540 | Expr *MaxExpr = nullptr; |
541 | if (auto Max = Attr.getMax()) { |
542 | Result = S.SubstExpr(Max, TemplateArgs); |
543 | if (Result.isInvalid()) |
544 | return; |
545 | MaxExpr = Result.getAs<Expr>(); |
546 | } |
547 | |
548 | S.addAMDGPUWavesPerEUAttr(New, Attr, MinExpr, MaxExpr); |
549 | } |
550 | |
551 | /// Determine whether the attribute A might be relevent to the declaration D. |
552 | /// If not, we can skip instantiating it. The attribute may or may not have |
553 | /// been instantiated yet. |
554 | static bool isRelevantAttr(Sema &S, const Decl *D, const Attr *A) { |
555 | // 'preferred_name' is only relevant to the matching specialization of the |
556 | // template. |
557 | if (const auto *PNA = dyn_cast<PreferredNameAttr>(A)) { |
558 | QualType T = PNA->getTypedefType(); |
559 | const auto *RD = cast<CXXRecordDecl>(D); |
560 | if (!T->isDependentType() && !RD->isDependentContext() && |
561 | !declaresSameEntity(T->getAsCXXRecordDecl(), RD)) |
562 | return false; |
563 | for (const auto *ExistingPNA : D->specific_attrs<PreferredNameAttr>()) |
564 | if (S.Context.hasSameType(ExistingPNA->getTypedefType(), |
565 | PNA->getTypedefType())) |
566 | return false; |
567 | return true; |
568 | } |
569 | |
570 | return true; |
571 | } |
572 | |
573 | void Sema::InstantiateAttrsForDecl( |
574 | const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Tmpl, |
575 | Decl *New, LateInstantiatedAttrVec *LateAttrs, |
576 | LocalInstantiationScope *OuterMostScope) { |
577 | if (NamedDecl *ND = dyn_cast<NamedDecl>(New)) { |
578 | // FIXME: This function is called multiple times for the same template |
579 | // specialization. We should only instantiate attributes that were added |
580 | // since the previous instantiation. |
581 | for (const auto *TmplAttr : Tmpl->attrs()) { |
582 | if (!isRelevantAttr(*this, New, TmplAttr)) |
583 | continue; |
584 | |
585 | // FIXME: If any of the special case versions from InstantiateAttrs become |
586 | // applicable to template declaration, we'll need to add them here. |
587 | CXXThisScopeRAII ThisScope( |
588 | *this, dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()), |
589 | Qualifiers(), ND->isCXXInstanceMember()); |
590 | |
591 | Attr *NewAttr = sema::instantiateTemplateAttributeForDecl( |
592 | TmplAttr, Context, *this, TemplateArgs); |
593 | if (NewAttr && isRelevantAttr(*this, New, NewAttr)) |
594 | New->addAttr(NewAttr); |
595 | } |
596 | } |
597 | } |
598 | |
599 | static Sema::RetainOwnershipKind |
600 | attrToRetainOwnershipKind(const Attr *A) { |
601 | switch (A->getKind()) { |
602 | case clang::attr::CFConsumed: |
603 | return Sema::RetainOwnershipKind::CF; |
604 | case clang::attr::OSConsumed: |
605 | return Sema::RetainOwnershipKind::OS; |
606 | case clang::attr::NSConsumed: |
607 | return Sema::RetainOwnershipKind::NS; |
608 | default: |
609 | llvm_unreachable("Wrong argument supplied")::llvm::llvm_unreachable_internal("Wrong argument supplied", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 609); |
610 | } |
611 | } |
612 | |
613 | void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, |
614 | const Decl *Tmpl, Decl *New, |
615 | LateInstantiatedAttrVec *LateAttrs, |
616 | LocalInstantiationScope *OuterMostScope) { |
617 | for (const auto *TmplAttr : Tmpl->attrs()) { |
618 | if (!isRelevantAttr(*this, New, TmplAttr)) |
619 | continue; |
620 | |
621 | // FIXME: This should be generalized to more than just the AlignedAttr. |
622 | const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr); |
623 | if (Aligned && Aligned->isAlignmentDependent()) { |
624 | instantiateDependentAlignedAttr(*this, TemplateArgs, Aligned, New); |
625 | continue; |
626 | } |
627 | |
628 | if (const auto *AssumeAligned = dyn_cast<AssumeAlignedAttr>(TmplAttr)) { |
629 | instantiateDependentAssumeAlignedAttr(*this, TemplateArgs, AssumeAligned, New); |
630 | continue; |
631 | } |
632 | |
633 | if (const auto *AlignValue = dyn_cast<AlignValueAttr>(TmplAttr)) { |
634 | instantiateDependentAlignValueAttr(*this, TemplateArgs, AlignValue, New); |
635 | continue; |
636 | } |
637 | |
638 | if (const auto *AllocAlign = dyn_cast<AllocAlignAttr>(TmplAttr)) { |
639 | instantiateDependentAllocAlignAttr(*this, TemplateArgs, AllocAlign, New); |
640 | continue; |
641 | } |
642 | |
643 | if (const auto *Annotate = dyn_cast<AnnotateAttr>(TmplAttr)) { |
644 | instantiateDependentAnnotationAttr(*this, TemplateArgs, Annotate, New); |
645 | continue; |
646 | } |
647 | |
648 | if (const auto *EnableIf = dyn_cast<EnableIfAttr>(TmplAttr)) { |
649 | instantiateDependentEnableIfAttr(*this, TemplateArgs, EnableIf, Tmpl, |
650 | cast<FunctionDecl>(New)); |
651 | continue; |
652 | } |
653 | |
654 | if (const auto *DiagnoseIf = dyn_cast<DiagnoseIfAttr>(TmplAttr)) { |
655 | instantiateDependentDiagnoseIfAttr(*this, TemplateArgs, DiagnoseIf, Tmpl, |
656 | cast<FunctionDecl>(New)); |
657 | continue; |
658 | } |
659 | |
660 | if (const auto *CUDALaunchBounds = |
661 | dyn_cast<CUDALaunchBoundsAttr>(TmplAttr)) { |
662 | instantiateDependentCUDALaunchBoundsAttr(*this, TemplateArgs, |
663 | *CUDALaunchBounds, New); |
664 | continue; |
665 | } |
666 | |
667 | if (const auto *Mode = dyn_cast<ModeAttr>(TmplAttr)) { |
668 | instantiateDependentModeAttr(*this, TemplateArgs, *Mode, New); |
669 | continue; |
670 | } |
671 | |
672 | if (const auto *OMPAttr = dyn_cast<OMPDeclareSimdDeclAttr>(TmplAttr)) { |
673 | instantiateOMPDeclareSimdDeclAttr(*this, TemplateArgs, *OMPAttr, New); |
674 | continue; |
675 | } |
676 | |
677 | if (const auto *OMPAttr = dyn_cast<OMPDeclareVariantAttr>(TmplAttr)) { |
678 | instantiateOMPDeclareVariantAttr(*this, TemplateArgs, *OMPAttr, New); |
679 | continue; |
680 | } |
681 | |
682 | if (const auto *AMDGPUFlatWorkGroupSize = |
683 | dyn_cast<AMDGPUFlatWorkGroupSizeAttr>(TmplAttr)) { |
684 | instantiateDependentAMDGPUFlatWorkGroupSizeAttr( |
685 | *this, TemplateArgs, *AMDGPUFlatWorkGroupSize, New); |
686 | } |
687 | |
688 | if (const auto *AMDGPUFlatWorkGroupSize = |
689 | dyn_cast<AMDGPUWavesPerEUAttr>(TmplAttr)) { |
690 | instantiateDependentAMDGPUWavesPerEUAttr(*this, TemplateArgs, |
691 | *AMDGPUFlatWorkGroupSize, New); |
692 | } |
693 | |
694 | // Existing DLL attribute on the instantiation takes precedence. |
695 | if (TmplAttr->getKind() == attr::DLLExport || |
696 | TmplAttr->getKind() == attr::DLLImport) { |
697 | if (New->hasAttr<DLLExportAttr>() || New->hasAttr<DLLImportAttr>()) { |
698 | continue; |
699 | } |
700 | } |
701 | |
702 | if (const auto *ABIAttr = dyn_cast<ParameterABIAttr>(TmplAttr)) { |
703 | AddParameterABIAttr(New, *ABIAttr, ABIAttr->getABI()); |
704 | continue; |
705 | } |
706 | |
707 | if (isa<NSConsumedAttr>(TmplAttr) || isa<OSConsumedAttr>(TmplAttr) || |
708 | isa<CFConsumedAttr>(TmplAttr)) { |
709 | AddXConsumedAttr(New, *TmplAttr, attrToRetainOwnershipKind(TmplAttr), |
710 | /*template instantiation=*/true); |
711 | continue; |
712 | } |
713 | |
714 | if (auto *A = dyn_cast<PointerAttr>(TmplAttr)) { |
715 | if (!New->hasAttr<PointerAttr>()) |
716 | New->addAttr(A->clone(Context)); |
717 | continue; |
718 | } |
719 | |
720 | if (auto *A = dyn_cast<OwnerAttr>(TmplAttr)) { |
721 | if (!New->hasAttr<OwnerAttr>()) |
722 | New->addAttr(A->clone(Context)); |
723 | continue; |
724 | } |
725 | |
726 | assert(!TmplAttr->isPackExpansion())((!TmplAttr->isPackExpansion()) ? static_cast<void> ( 0) : __assert_fail ("!TmplAttr->isPackExpansion()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 726, __PRETTY_FUNCTION__)); |
727 | if (TmplAttr->isLateParsed() && LateAttrs) { |
728 | // Late parsed attributes must be instantiated and attached after the |
729 | // enclosing class has been instantiated. See Sema::InstantiateClass. |
730 | LocalInstantiationScope *Saved = nullptr; |
731 | if (CurrentInstantiationScope) |
732 | Saved = CurrentInstantiationScope->cloneScopes(OuterMostScope); |
733 | LateAttrs->push_back(LateInstantiatedAttribute(TmplAttr, Saved, New)); |
734 | } else { |
735 | // Allow 'this' within late-parsed attributes. |
736 | auto *ND = cast<NamedDecl>(New); |
737 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()); |
738 | CXXThisScopeRAII ThisScope(*this, ThisContext, Qualifiers(), |
739 | ND->isCXXInstanceMember()); |
740 | |
741 | Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context, |
742 | *this, TemplateArgs); |
743 | if (NewAttr && isRelevantAttr(*this, New, TmplAttr)) |
744 | New->addAttr(NewAttr); |
745 | } |
746 | } |
747 | } |
748 | |
749 | /// In the MS ABI, we need to instantiate default arguments of dllexported |
750 | /// default constructors along with the constructor definition. This allows IR |
751 | /// gen to emit a constructor closure which calls the default constructor with |
752 | /// its default arguments. |
753 | void Sema::InstantiateDefaultCtorDefaultArgs(CXXConstructorDecl *Ctor) { |
754 | assert(Context.getTargetInfo().getCXXABI().isMicrosoft() &&((Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()) ? static_cast<void> ( 0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 755, __PRETTY_FUNCTION__)) |
755 | Ctor->isDefaultConstructor())((Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()) ? static_cast<void> ( 0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 755, __PRETTY_FUNCTION__)); |
756 | unsigned NumParams = Ctor->getNumParams(); |
757 | if (NumParams == 0) |
758 | return; |
759 | DLLExportAttr *Attr = Ctor->getAttr<DLLExportAttr>(); |
760 | if (!Attr) |
761 | return; |
762 | for (unsigned I = 0; I != NumParams; ++I) { |
763 | (void)CheckCXXDefaultArgExpr(Attr->getLocation(), Ctor, |
764 | Ctor->getParamDecl(I)); |
765 | DiscardCleanupsInEvaluationContext(); |
766 | } |
767 | } |
768 | |
769 | /// Get the previous declaration of a declaration for the purposes of template |
770 | /// instantiation. If this finds a previous declaration, then the previous |
771 | /// declaration of the instantiation of D should be an instantiation of the |
772 | /// result of this function. |
773 | template<typename DeclT> |
774 | static DeclT *getPreviousDeclForInstantiation(DeclT *D) { |
775 | DeclT *Result = D->getPreviousDecl(); |
776 | |
777 | // If the declaration is within a class, and the previous declaration was |
778 | // merged from a different definition of that class, then we don't have a |
779 | // previous declaration for the purpose of template instantiation. |
780 | if (Result && isa<CXXRecordDecl>(D->getDeclContext()) && |
781 | D->getLexicalDeclContext() != Result->getLexicalDeclContext()) |
782 | return nullptr; |
783 | |
784 | return Result; |
785 | } |
786 | |
787 | Decl * |
788 | TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) { |
789 | llvm_unreachable("Translation units cannot be instantiated")::llvm::llvm_unreachable_internal("Translation units cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 789); |
790 | } |
791 | |
792 | Decl * |
793 | TemplateDeclInstantiator::VisitPragmaCommentDecl(PragmaCommentDecl *D) { |
794 | llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 794); |
795 | } |
796 | |
797 | Decl *TemplateDeclInstantiator::VisitPragmaDetectMismatchDecl( |
798 | PragmaDetectMismatchDecl *D) { |
799 | llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 799); |
800 | } |
801 | |
802 | Decl * |
803 | TemplateDeclInstantiator::VisitExternCContextDecl(ExternCContextDecl *D) { |
804 | llvm_unreachable("extern \"C\" context cannot be instantiated")::llvm::llvm_unreachable_internal("extern \"C\" context cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 804); |
805 | } |
806 | |
807 | Decl *TemplateDeclInstantiator::VisitMSGuidDecl(MSGuidDecl *D) { |
808 | llvm_unreachable("GUID declaration cannot be instantiated")::llvm::llvm_unreachable_internal("GUID declaration cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 808); |
809 | } |
810 | |
811 | Decl *TemplateDeclInstantiator::VisitTemplateParamObjectDecl( |
812 | TemplateParamObjectDecl *D) { |
813 | llvm_unreachable("template parameter objects cannot be instantiated")::llvm::llvm_unreachable_internal("template parameter objects cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 813); |
814 | } |
815 | |
816 | Decl * |
817 | TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) { |
818 | LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
819 | D->getIdentifier()); |
820 | Owner->addDecl(Inst); |
821 | return Inst; |
822 | } |
823 | |
824 | Decl * |
825 | TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) { |
826 | llvm_unreachable("Namespaces cannot be instantiated")::llvm::llvm_unreachable_internal("Namespaces cannot be instantiated" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 826); |
827 | } |
828 | |
829 | Decl * |
830 | TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) { |
831 | NamespaceAliasDecl *Inst |
832 | = NamespaceAliasDecl::Create(SemaRef.Context, Owner, |
833 | D->getNamespaceLoc(), |
834 | D->getAliasLoc(), |
835 | D->getIdentifier(), |
836 | D->getQualifierLoc(), |
837 | D->getTargetNameLoc(), |
838 | D->getNamespace()); |
839 | Owner->addDecl(Inst); |
840 | return Inst; |
841 | } |
842 | |
843 | Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D, |
844 | bool IsTypeAlias) { |
845 | bool Invalid = false; |
846 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
847 | if (DI->getType()->isInstantiationDependentType() || |
848 | DI->getType()->isVariablyModifiedType()) { |
849 | DI = SemaRef.SubstType(DI, TemplateArgs, |
850 | D->getLocation(), D->getDeclName()); |
851 | if (!DI) { |
852 | Invalid = true; |
853 | DI = SemaRef.Context.getTrivialTypeSourceInfo(SemaRef.Context.IntTy); |
854 | } |
855 | } else { |
856 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
857 | } |
858 | |
859 | // HACK: g++ has a bug where it gets the value kind of ?: wrong. |
860 | // libstdc++ relies upon this bug in its implementation of common_type. |
861 | // If we happen to be processing that implementation, fake up the g++ ?: |
862 | // semantics. See LWG issue 2141 for more information on the bug. |
863 | const DecltypeType *DT = DI->getType()->getAs<DecltypeType>(); |
864 | CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext()); |
865 | if (DT && RD && isa<ConditionalOperator>(DT->getUnderlyingExpr()) && |
866 | DT->isReferenceType() && |
867 | RD->getEnclosingNamespaceContext() == SemaRef.getStdNamespace() && |
868 | RD->getIdentifier() && RD->getIdentifier()->isStr("common_type") && |
869 | D->getIdentifier() && D->getIdentifier()->isStr("type") && |
870 | SemaRef.getSourceManager().isInSystemHeader(D->getBeginLoc())) |
871 | // Fold it to the (non-reference) type which g++ would have produced. |
872 | DI = SemaRef.Context.getTrivialTypeSourceInfo( |
873 | DI->getType().getNonReferenceType()); |
874 | |
875 | // Create the new typedef |
876 | TypedefNameDecl *Typedef; |
877 | if (IsTypeAlias) |
878 | Typedef = TypeAliasDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
879 | D->getLocation(), D->getIdentifier(), DI); |
880 | else |
881 | Typedef = TypedefDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
882 | D->getLocation(), D->getIdentifier(), DI); |
883 | if (Invalid) |
884 | Typedef->setInvalidDecl(); |
885 | |
886 | // If the old typedef was the name for linkage purposes of an anonymous |
887 | // tag decl, re-establish that relationship for the new typedef. |
888 | if (const TagType *oldTagType = D->getUnderlyingType()->getAs<TagType>()) { |
889 | TagDecl *oldTag = oldTagType->getDecl(); |
890 | if (oldTag->getTypedefNameForAnonDecl() == D && !Invalid) { |
891 | TagDecl *newTag = DI->getType()->castAs<TagType>()->getDecl(); |
892 | assert(!newTag->hasNameForLinkage())((!newTag->hasNameForLinkage()) ? static_cast<void> ( 0) : __assert_fail ("!newTag->hasNameForLinkage()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 892, __PRETTY_FUNCTION__)); |
893 | newTag->setTypedefNameForAnonDecl(Typedef); |
894 | } |
895 | } |
896 | |
897 | if (TypedefNameDecl *Prev = getPreviousDeclForInstantiation(D)) { |
898 | NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(D->getLocation(), Prev, |
899 | TemplateArgs); |
900 | if (!InstPrev) |
901 | return nullptr; |
902 | |
903 | TypedefNameDecl *InstPrevTypedef = cast<TypedefNameDecl>(InstPrev); |
904 | |
905 | // If the typedef types are not identical, reject them. |
906 | SemaRef.isIncompatibleTypedef(InstPrevTypedef, Typedef); |
907 | |
908 | Typedef->setPreviousDecl(InstPrevTypedef); |
909 | } |
910 | |
911 | SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef); |
912 | |
913 | if (D->getUnderlyingType()->getAs<DependentNameType>()) |
914 | SemaRef.inferGslPointerAttribute(Typedef); |
915 | |
916 | Typedef->setAccess(D->getAccess()); |
917 | |
918 | return Typedef; |
919 | } |
920 | |
921 | Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) { |
922 | Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false); |
923 | if (Typedef) |
924 | Owner->addDecl(Typedef); |
925 | return Typedef; |
926 | } |
927 | |
928 | Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) { |
929 | Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true); |
930 | if (Typedef) |
931 | Owner->addDecl(Typedef); |
932 | return Typedef; |
933 | } |
934 | |
935 | Decl * |
936 | TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) { |
937 | // Create a local instantiation scope for this type alias template, which |
938 | // will contain the instantiations of the template parameters. |
939 | LocalInstantiationScope Scope(SemaRef); |
940 | |
941 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
942 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
943 | if (!InstParams) |
944 | return nullptr; |
945 | |
946 | TypeAliasDecl *Pattern = D->getTemplatedDecl(); |
947 | |
948 | TypeAliasTemplateDecl *PrevAliasTemplate = nullptr; |
949 | if (getPreviousDeclForInstantiation<TypedefNameDecl>(Pattern)) { |
950 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
951 | if (!Found.empty()) { |
952 | PrevAliasTemplate = dyn_cast<TypeAliasTemplateDecl>(Found.front()); |
953 | } |
954 | } |
955 | |
956 | TypeAliasDecl *AliasInst = cast_or_null<TypeAliasDecl>( |
957 | InstantiateTypedefNameDecl(Pattern, /*IsTypeAlias=*/true)); |
958 | if (!AliasInst) |
959 | return nullptr; |
960 | |
961 | TypeAliasTemplateDecl *Inst |
962 | = TypeAliasTemplateDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
963 | D->getDeclName(), InstParams, AliasInst); |
964 | AliasInst->setDescribedAliasTemplate(Inst); |
965 | if (PrevAliasTemplate) |
966 | Inst->setPreviousDecl(PrevAliasTemplate); |
967 | |
968 | Inst->setAccess(D->getAccess()); |
969 | |
970 | if (!PrevAliasTemplate) |
971 | Inst->setInstantiatedFromMemberTemplate(D); |
972 | |
973 | Owner->addDecl(Inst); |
974 | |
975 | return Inst; |
976 | } |
977 | |
978 | Decl *TemplateDeclInstantiator::VisitBindingDecl(BindingDecl *D) { |
979 | auto *NewBD = BindingDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
980 | D->getIdentifier()); |
981 | NewBD->setReferenced(D->isReferenced()); |
982 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewBD); |
983 | return NewBD; |
984 | } |
985 | |
986 | Decl *TemplateDeclInstantiator::VisitDecompositionDecl(DecompositionDecl *D) { |
987 | // Transform the bindings first. |
988 | SmallVector<BindingDecl*, 16> NewBindings; |
989 | for (auto *OldBD : D->bindings()) |
990 | NewBindings.push_back(cast<BindingDecl>(VisitBindingDecl(OldBD))); |
991 | ArrayRef<BindingDecl*> NewBindingArray = NewBindings; |
992 | |
993 | auto *NewDD = cast_or_null<DecompositionDecl>( |
994 | VisitVarDecl(D, /*InstantiatingVarTemplate=*/false, &NewBindingArray)); |
995 | |
996 | if (!NewDD || NewDD->isInvalidDecl()) |
997 | for (auto *NewBD : NewBindings) |
998 | NewBD->setInvalidDecl(); |
999 | |
1000 | return NewDD; |
1001 | } |
1002 | |
1003 | Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) { |
1004 | return VisitVarDecl(D, /*InstantiatingVarTemplate=*/false); |
1005 | } |
1006 | |
1007 | Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D, |
1008 | bool InstantiatingVarTemplate, |
1009 | ArrayRef<BindingDecl*> *Bindings) { |
1010 | |
1011 | // Do substitution on the type of the declaration |
1012 | TypeSourceInfo *DI = SemaRef.SubstType( |
1013 | D->getTypeSourceInfo(), TemplateArgs, D->getTypeSpecStartLoc(), |
1014 | D->getDeclName(), /*AllowDeducedTST*/true); |
1015 | if (!DI) |
1016 | return nullptr; |
1017 | |
1018 | if (DI->getType()->isFunctionType()) { |
1019 | SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function) |
1020 | << D->isStaticDataMember() << DI->getType(); |
1021 | return nullptr; |
1022 | } |
1023 | |
1024 | DeclContext *DC = Owner; |
1025 | if (D->isLocalExternDecl()) |
1026 | SemaRef.adjustContextForLocalExternDecl(DC); |
1027 | |
1028 | // Build the instantiated declaration. |
1029 | VarDecl *Var; |
1030 | if (Bindings) |
1031 | Var = DecompositionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(), |
1032 | D->getLocation(), DI->getType(), DI, |
1033 | D->getStorageClass(), *Bindings); |
1034 | else |
1035 | Var = VarDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(), |
1036 | D->getLocation(), D->getIdentifier(), DI->getType(), |
1037 | DI, D->getStorageClass()); |
1038 | |
1039 | // In ARC, infer 'retaining' for variables of retainable type. |
1040 | if (SemaRef.getLangOpts().ObjCAutoRefCount && |
1041 | SemaRef.inferObjCARCLifetime(Var)) |
1042 | Var->setInvalidDecl(); |
1043 | |
1044 | if (SemaRef.getLangOpts().OpenCL) |
1045 | SemaRef.deduceOpenCLAddressSpace(Var); |
1046 | |
1047 | // Substitute the nested name specifier, if any. |
1048 | if (SubstQualifier(D, Var)) |
1049 | return nullptr; |
1050 | |
1051 | SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner, |
1052 | StartingScope, InstantiatingVarTemplate); |
1053 | |
1054 | if (D->isNRVOVariable()) { |
1055 | QualType ReturnType = cast<FunctionDecl>(DC)->getReturnType(); |
1056 | if (SemaRef.isCopyElisionCandidate(ReturnType, Var, Sema::CES_Strict)) |
1057 | Var->setNRVOVariable(true); |
1058 | } |
1059 | |
1060 | Var->setImplicit(D->isImplicit()); |
1061 | |
1062 | if (Var->isStaticLocal()) |
1063 | SemaRef.CheckStaticLocalForDllExport(Var); |
1064 | |
1065 | return Var; |
1066 | } |
1067 | |
1068 | Decl *TemplateDeclInstantiator::VisitAccessSpecDecl(AccessSpecDecl *D) { |
1069 | AccessSpecDecl* AD |
1070 | = AccessSpecDecl::Create(SemaRef.Context, D->getAccess(), Owner, |
1071 | D->getAccessSpecifierLoc(), D->getColonLoc()); |
1072 | Owner->addHiddenDecl(AD); |
1073 | return AD; |
1074 | } |
1075 | |
1076 | Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) { |
1077 | bool Invalid = false; |
1078 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
1079 | if (DI->getType()->isInstantiationDependentType() || |
1080 | DI->getType()->isVariablyModifiedType()) { |
1081 | DI = SemaRef.SubstType(DI, TemplateArgs, |
1082 | D->getLocation(), D->getDeclName()); |
1083 | if (!DI) { |
1084 | DI = D->getTypeSourceInfo(); |
1085 | Invalid = true; |
1086 | } else if (DI->getType()->isFunctionType()) { |
1087 | // C++ [temp.arg.type]p3: |
1088 | // If a declaration acquires a function type through a type |
1089 | // dependent on a template-parameter and this causes a |
1090 | // declaration that does not use the syntactic form of a |
1091 | // function declarator to have function type, the program is |
1092 | // ill-formed. |
1093 | SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function) |
1094 | << DI->getType(); |
1095 | Invalid = true; |
1096 | } |
1097 | } else { |
1098 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
1099 | } |
1100 | |
1101 | Expr *BitWidth = D->getBitWidth(); |
1102 | if (Invalid) |
1103 | BitWidth = nullptr; |
1104 | else if (BitWidth) { |
1105 | // The bit-width expression is a constant expression. |
1106 | EnterExpressionEvaluationContext Unevaluated( |
1107 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
1108 | |
1109 | ExprResult InstantiatedBitWidth |
1110 | = SemaRef.SubstExpr(BitWidth, TemplateArgs); |
1111 | if (InstantiatedBitWidth.isInvalid()) { |
1112 | Invalid = true; |
1113 | BitWidth = nullptr; |
1114 | } else |
1115 | BitWidth = InstantiatedBitWidth.getAs<Expr>(); |
1116 | } |
1117 | |
1118 | FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(), |
1119 | DI->getType(), DI, |
1120 | cast<RecordDecl>(Owner), |
1121 | D->getLocation(), |
1122 | D->isMutable(), |
1123 | BitWidth, |
1124 | D->getInClassInitStyle(), |
1125 | D->getInnerLocStart(), |
1126 | D->getAccess(), |
1127 | nullptr); |
1128 | if (!Field) { |
1129 | cast<Decl>(Owner)->setInvalidDecl(); |
1130 | return nullptr; |
1131 | } |
1132 | |
1133 | SemaRef.InstantiateAttrs(TemplateArgs, D, Field, LateAttrs, StartingScope); |
1134 | |
1135 | if (Field->hasAttrs()) |
1136 | SemaRef.CheckAlignasUnderalignment(Field); |
1137 | |
1138 | if (Invalid) |
1139 | Field->setInvalidDecl(); |
1140 | |
1141 | if (!Field->getDeclName()) { |
1142 | // Keep track of where this decl came from. |
1143 | SemaRef.Context.setInstantiatedFromUnnamedFieldDecl(Field, D); |
1144 | } |
1145 | if (CXXRecordDecl *Parent= dyn_cast<CXXRecordDecl>(Field->getDeclContext())) { |
1146 | if (Parent->isAnonymousStructOrUnion() && |
1147 | Parent->getRedeclContext()->isFunctionOrMethod()) |
1148 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Field); |
1149 | } |
1150 | |
1151 | Field->setImplicit(D->isImplicit()); |
1152 | Field->setAccess(D->getAccess()); |
1153 | Owner->addDecl(Field); |
1154 | |
1155 | return Field; |
1156 | } |
1157 | |
1158 | Decl *TemplateDeclInstantiator::VisitMSPropertyDecl(MSPropertyDecl *D) { |
1159 | bool Invalid = false; |
1160 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
1161 | |
1162 | if (DI->getType()->isVariablyModifiedType()) { |
1163 | SemaRef.Diag(D->getLocation(), diag::err_property_is_variably_modified) |
1164 | << D; |
1165 | Invalid = true; |
1166 | } else if (DI->getType()->isInstantiationDependentType()) { |
1167 | DI = SemaRef.SubstType(DI, TemplateArgs, |
1168 | D->getLocation(), D->getDeclName()); |
1169 | if (!DI) { |
1170 | DI = D->getTypeSourceInfo(); |
1171 | Invalid = true; |
1172 | } else if (DI->getType()->isFunctionType()) { |
1173 | // C++ [temp.arg.type]p3: |
1174 | // If a declaration acquires a function type through a type |
1175 | // dependent on a template-parameter and this causes a |
1176 | // declaration that does not use the syntactic form of a |
1177 | // function declarator to have function type, the program is |
1178 | // ill-formed. |
1179 | SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function) |
1180 | << DI->getType(); |
1181 | Invalid = true; |
1182 | } |
1183 | } else { |
1184 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
1185 | } |
1186 | |
1187 | MSPropertyDecl *Property = MSPropertyDecl::Create( |
1188 | SemaRef.Context, Owner, D->getLocation(), D->getDeclName(), DI->getType(), |
1189 | DI, D->getBeginLoc(), D->getGetterId(), D->getSetterId()); |
1190 | |
1191 | SemaRef.InstantiateAttrs(TemplateArgs, D, Property, LateAttrs, |
1192 | StartingScope); |
1193 | |
1194 | if (Invalid) |
1195 | Property->setInvalidDecl(); |
1196 | |
1197 | Property->setAccess(D->getAccess()); |
1198 | Owner->addDecl(Property); |
1199 | |
1200 | return Property; |
1201 | } |
1202 | |
1203 | Decl *TemplateDeclInstantiator::VisitIndirectFieldDecl(IndirectFieldDecl *D) { |
1204 | NamedDecl **NamedChain = |
1205 | new (SemaRef.Context)NamedDecl*[D->getChainingSize()]; |
1206 | |
1207 | int i = 0; |
1208 | for (auto *PI : D->chain()) { |
1209 | NamedDecl *Next = SemaRef.FindInstantiatedDecl(D->getLocation(), PI, |
1210 | TemplateArgs); |
1211 | if (!Next) |
1212 | return nullptr; |
1213 | |
1214 | NamedChain[i++] = Next; |
1215 | } |
1216 | |
1217 | QualType T = cast<FieldDecl>(NamedChain[i-1])->getType(); |
1218 | IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create( |
1219 | SemaRef.Context, Owner, D->getLocation(), D->getIdentifier(), T, |
1220 | {NamedChain, D->getChainingSize()}); |
1221 | |
1222 | for (const auto *Attr : D->attrs()) |
1223 | IndirectField->addAttr(Attr->clone(SemaRef.Context)); |
1224 | |
1225 | IndirectField->setImplicit(D->isImplicit()); |
1226 | IndirectField->setAccess(D->getAccess()); |
1227 | Owner->addDecl(IndirectField); |
1228 | return IndirectField; |
1229 | } |
1230 | |
1231 | Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) { |
1232 | // Handle friend type expressions by simply substituting template |
1233 | // parameters into the pattern type and checking the result. |
1234 | if (TypeSourceInfo *Ty = D->getFriendType()) { |
1235 | TypeSourceInfo *InstTy; |
1236 | // If this is an unsupported friend, don't bother substituting template |
1237 | // arguments into it. The actual type referred to won't be used by any |
1238 | // parts of Clang, and may not be valid for instantiating. Just use the |
1239 | // same info for the instantiated friend. |
1240 | if (D->isUnsupportedFriend()) { |
1241 | InstTy = Ty; |
1242 | } else { |
1243 | InstTy = SemaRef.SubstType(Ty, TemplateArgs, |
1244 | D->getLocation(), DeclarationName()); |
1245 | } |
1246 | if (!InstTy) |
1247 | return nullptr; |
1248 | |
1249 | FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getBeginLoc(), |
1250 | D->getFriendLoc(), InstTy); |
1251 | if (!FD) |
1252 | return nullptr; |
1253 | |
1254 | FD->setAccess(AS_public); |
1255 | FD->setUnsupportedFriend(D->isUnsupportedFriend()); |
1256 | Owner->addDecl(FD); |
1257 | return FD; |
1258 | } |
1259 | |
1260 | NamedDecl *ND = D->getFriendDecl(); |
1261 | assert(ND && "friend decl must be a decl or a type!")((ND && "friend decl must be a decl or a type!") ? static_cast <void> (0) : __assert_fail ("ND && \"friend decl must be a decl or a type!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1261, __PRETTY_FUNCTION__)); |
1262 | |
1263 | // All of the Visit implementations for the various potential friend |
1264 | // declarations have to be carefully written to work for friend |
1265 | // objects, with the most important detail being that the target |
1266 | // decl should almost certainly not be placed in Owner. |
1267 | Decl *NewND = Visit(ND); |
1268 | if (!NewND) return nullptr; |
1269 | |
1270 | FriendDecl *FD = |
1271 | FriendDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
1272 | cast<NamedDecl>(NewND), D->getFriendLoc()); |
1273 | FD->setAccess(AS_public); |
1274 | FD->setUnsupportedFriend(D->isUnsupportedFriend()); |
1275 | Owner->addDecl(FD); |
1276 | return FD; |
1277 | } |
1278 | |
1279 | Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) { |
1280 | Expr *AssertExpr = D->getAssertExpr(); |
1281 | |
1282 | // The expression in a static assertion is a constant expression. |
1283 | EnterExpressionEvaluationContext Unevaluated( |
1284 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
1285 | |
1286 | ExprResult InstantiatedAssertExpr |
1287 | = SemaRef.SubstExpr(AssertExpr, TemplateArgs); |
1288 | if (InstantiatedAssertExpr.isInvalid()) |
1289 | return nullptr; |
1290 | |
1291 | return SemaRef.BuildStaticAssertDeclaration(D->getLocation(), |
1292 | InstantiatedAssertExpr.get(), |
1293 | D->getMessage(), |
1294 | D->getRParenLoc(), |
1295 | D->isFailed()); |
1296 | } |
1297 | |
1298 | Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) { |
1299 | EnumDecl *PrevDecl = nullptr; |
1300 | if (EnumDecl *PatternPrev = getPreviousDeclForInstantiation(D)) { |
1301 | NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(), |
1302 | PatternPrev, |
1303 | TemplateArgs); |
1304 | if (!Prev) return nullptr; |
1305 | PrevDecl = cast<EnumDecl>(Prev); |
1306 | } |
1307 | |
1308 | EnumDecl *Enum = |
1309 | EnumDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
1310 | D->getLocation(), D->getIdentifier(), PrevDecl, |
1311 | D->isScoped(), D->isScopedUsingClassTag(), D->isFixed()); |
1312 | if (D->isFixed()) { |
1313 | if (TypeSourceInfo *TI = D->getIntegerTypeSourceInfo()) { |
1314 | // If we have type source information for the underlying type, it means it |
1315 | // has been explicitly set by the user. Perform substitution on it before |
1316 | // moving on. |
1317 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
1318 | TypeSourceInfo *NewTI = SemaRef.SubstType(TI, TemplateArgs, UnderlyingLoc, |
1319 | DeclarationName()); |
1320 | if (!NewTI || SemaRef.CheckEnumUnderlyingType(NewTI)) |
1321 | Enum->setIntegerType(SemaRef.Context.IntTy); |
1322 | else |
1323 | Enum->setIntegerTypeSourceInfo(NewTI); |
1324 | } else { |
1325 | assert(!D->getIntegerType()->isDependentType()((!D->getIntegerType()->isDependentType() && "Dependent type without type source info" ) ? static_cast<void> (0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1326, __PRETTY_FUNCTION__)) |
1326 | && "Dependent type without type source info")((!D->getIntegerType()->isDependentType() && "Dependent type without type source info" ) ? static_cast<void> (0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1326, __PRETTY_FUNCTION__)); |
1327 | Enum->setIntegerType(D->getIntegerType()); |
1328 | } |
1329 | } |
1330 | |
1331 | SemaRef.InstantiateAttrs(TemplateArgs, D, Enum); |
1332 | |
1333 | Enum->setInstantiationOfMemberEnum(D, TSK_ImplicitInstantiation); |
1334 | Enum->setAccess(D->getAccess()); |
1335 | // Forward the mangling number from the template to the instantiated decl. |
1336 | SemaRef.Context.setManglingNumber(Enum, SemaRef.Context.getManglingNumber(D)); |
1337 | // See if the old tag was defined along with a declarator. |
1338 | // If it did, mark the new tag as being associated with that declarator. |
1339 | if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D)) |
1340 | SemaRef.Context.addDeclaratorForUnnamedTagDecl(Enum, DD); |
1341 | // See if the old tag was defined along with a typedef. |
1342 | // If it did, mark the new tag as being associated with that typedef. |
1343 | if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D)) |
1344 | SemaRef.Context.addTypedefNameForUnnamedTagDecl(Enum, TND); |
1345 | if (SubstQualifier(D, Enum)) return nullptr; |
1346 | Owner->addDecl(Enum); |
1347 | |
1348 | EnumDecl *Def = D->getDefinition(); |
1349 | if (Def && Def != D) { |
1350 | // If this is an out-of-line definition of an enum member template, check |
1351 | // that the underlying types match in the instantiation of both |
1352 | // declarations. |
1353 | if (TypeSourceInfo *TI = Def->getIntegerTypeSourceInfo()) { |
1354 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
1355 | QualType DefnUnderlying = |
1356 | SemaRef.SubstType(TI->getType(), TemplateArgs, |
1357 | UnderlyingLoc, DeclarationName()); |
1358 | SemaRef.CheckEnumRedeclaration(Def->getLocation(), Def->isScoped(), |
1359 | DefnUnderlying, /*IsFixed=*/true, Enum); |
1360 | } |
1361 | } |
1362 | |
1363 | // C++11 [temp.inst]p1: The implicit instantiation of a class template |
1364 | // specialization causes the implicit instantiation of the declarations, but |
1365 | // not the definitions of scoped member enumerations. |
1366 | // |
1367 | // DR1484 clarifies that enumeration definitions inside of a template |
1368 | // declaration aren't considered entities that can be separately instantiated |
1369 | // from the rest of the entity they are declared inside of. |
1370 | if (isDeclWithinFunction(D) ? D == Def : Def && !Enum->isScoped()) { |
1371 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Enum); |
1372 | InstantiateEnumDefinition(Enum, Def); |
1373 | } |
1374 | |
1375 | return Enum; |
1376 | } |
1377 | |
1378 | void TemplateDeclInstantiator::InstantiateEnumDefinition( |
1379 | EnumDecl *Enum, EnumDecl *Pattern) { |
1380 | Enum->startDefinition(); |
1381 | |
1382 | // Update the location to refer to the definition. |
1383 | Enum->setLocation(Pattern->getLocation()); |
1384 | |
1385 | SmallVector<Decl*, 4> Enumerators; |
1386 | |
1387 | EnumConstantDecl *LastEnumConst = nullptr; |
1388 | for (auto *EC : Pattern->enumerators()) { |
1389 | // The specified value for the enumerator. |
1390 | ExprResult Value((Expr *)nullptr); |
1391 | if (Expr *UninstValue = EC->getInitExpr()) { |
1392 | // The enumerator's value expression is a constant expression. |
1393 | EnterExpressionEvaluationContext Unevaluated( |
1394 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
1395 | |
1396 | Value = SemaRef.SubstExpr(UninstValue, TemplateArgs); |
1397 | } |
1398 | |
1399 | // Drop the initial value and continue. |
1400 | bool isInvalid = false; |
1401 | if (Value.isInvalid()) { |
1402 | Value = nullptr; |
1403 | isInvalid = true; |
1404 | } |
1405 | |
1406 | EnumConstantDecl *EnumConst |
1407 | = SemaRef.CheckEnumConstant(Enum, LastEnumConst, |
1408 | EC->getLocation(), EC->getIdentifier(), |
1409 | Value.get()); |
1410 | |
1411 | if (isInvalid) { |
1412 | if (EnumConst) |
1413 | EnumConst->setInvalidDecl(); |
1414 | Enum->setInvalidDecl(); |
1415 | } |
1416 | |
1417 | if (EnumConst) { |
1418 | SemaRef.InstantiateAttrs(TemplateArgs, EC, EnumConst); |
1419 | |
1420 | EnumConst->setAccess(Enum->getAccess()); |
1421 | Enum->addDecl(EnumConst); |
1422 | Enumerators.push_back(EnumConst); |
1423 | LastEnumConst = EnumConst; |
1424 | |
1425 | if (Pattern->getDeclContext()->isFunctionOrMethod() && |
1426 | !Enum->isScoped()) { |
1427 | // If the enumeration is within a function or method, record the enum |
1428 | // constant as a local. |
1429 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(EC, EnumConst); |
1430 | } |
1431 | } |
1432 | } |
1433 | |
1434 | SemaRef.ActOnEnumBody(Enum->getLocation(), Enum->getBraceRange(), Enum, |
1435 | Enumerators, nullptr, ParsedAttributesView()); |
1436 | } |
1437 | |
1438 | Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) { |
1439 | llvm_unreachable("EnumConstantDecls can only occur within EnumDecls.")::llvm::llvm_unreachable_internal("EnumConstantDecls can only occur within EnumDecls." , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1439); |
1440 | } |
1441 | |
1442 | Decl * |
1443 | TemplateDeclInstantiator::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) { |
1444 | llvm_unreachable("BuiltinTemplateDecls cannot be instantiated.")::llvm::llvm_unreachable_internal("BuiltinTemplateDecls cannot be instantiated." , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1444); |
1445 | } |
1446 | |
1447 | Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) { |
1448 | bool isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
1449 | |
1450 | // Create a local instantiation scope for this class template, which |
1451 | // will contain the instantiations of the template parameters. |
1452 | LocalInstantiationScope Scope(SemaRef); |
1453 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
1454 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
1455 | if (!InstParams) |
1456 | return nullptr; |
1457 | |
1458 | CXXRecordDecl *Pattern = D->getTemplatedDecl(); |
1459 | |
1460 | // Instantiate the qualifier. We have to do this first in case |
1461 | // we're a friend declaration, because if we are then we need to put |
1462 | // the new declaration in the appropriate context. |
1463 | NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc(); |
1464 | if (QualifierLoc) { |
1465 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
1466 | TemplateArgs); |
1467 | if (!QualifierLoc) |
1468 | return nullptr; |
1469 | } |
1470 | |
1471 | CXXRecordDecl *PrevDecl = nullptr; |
1472 | ClassTemplateDecl *PrevClassTemplate = nullptr; |
1473 | |
1474 | if (!isFriend && getPreviousDeclForInstantiation(Pattern)) { |
1475 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
1476 | if (!Found.empty()) { |
1477 | PrevClassTemplate = dyn_cast<ClassTemplateDecl>(Found.front()); |
1478 | if (PrevClassTemplate) |
1479 | PrevDecl = PrevClassTemplate->getTemplatedDecl(); |
1480 | } |
1481 | } |
1482 | |
1483 | // If this isn't a friend, then it's a member template, in which |
1484 | // case we just want to build the instantiation in the |
1485 | // specialization. If it is a friend, we want to build it in |
1486 | // the appropriate context. |
1487 | DeclContext *DC = Owner; |
1488 | if (isFriend) { |
1489 | if (QualifierLoc) { |
1490 | CXXScopeSpec SS; |
1491 | SS.Adopt(QualifierLoc); |
1492 | DC = SemaRef.computeDeclContext(SS); |
1493 | if (!DC) return nullptr; |
1494 | } else { |
1495 | DC = SemaRef.FindInstantiatedContext(Pattern->getLocation(), |
1496 | Pattern->getDeclContext(), |
1497 | TemplateArgs); |
1498 | } |
1499 | |
1500 | // Look for a previous declaration of the template in the owning |
1501 | // context. |
1502 | LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(), |
1503 | Sema::LookupOrdinaryName, |
1504 | SemaRef.forRedeclarationInCurContext()); |
1505 | SemaRef.LookupQualifiedName(R, DC); |
1506 | |
1507 | if (R.isSingleResult()) { |
1508 | PrevClassTemplate = R.getAsSingle<ClassTemplateDecl>(); |
1509 | if (PrevClassTemplate) |
1510 | PrevDecl = PrevClassTemplate->getTemplatedDecl(); |
1511 | } |
1512 | |
1513 | if (!PrevClassTemplate && QualifierLoc) { |
1514 | SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope) |
1515 | << D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC |
1516 | << QualifierLoc.getSourceRange(); |
1517 | return nullptr; |
1518 | } |
1519 | |
1520 | bool AdoptedPreviousTemplateParams = false; |
1521 | if (PrevClassTemplate) { |
1522 | bool Complain = true; |
1523 | |
1524 | // HACK: libstdc++ 4.2.1 contains an ill-formed friend class |
1525 | // template for struct std::tr1::__detail::_Map_base, where the |
1526 | // template parameters of the friend declaration don't match the |
1527 | // template parameters of the original declaration. In this one |
1528 | // case, we don't complain about the ill-formed friend |
1529 | // declaration. |
1530 | if (isFriend && Pattern->getIdentifier() && |
1531 | Pattern->getIdentifier()->isStr("_Map_base") && |
1532 | DC->isNamespace() && |
1533 | cast<NamespaceDecl>(DC)->getIdentifier() && |
1534 | cast<NamespaceDecl>(DC)->getIdentifier()->isStr("__detail")) { |
1535 | DeclContext *DCParent = DC->getParent(); |
1536 | if (DCParent->isNamespace() && |
1537 | cast<NamespaceDecl>(DCParent)->getIdentifier() && |
1538 | cast<NamespaceDecl>(DCParent)->getIdentifier()->isStr("tr1")) { |
1539 | if (cast<Decl>(DCParent)->isInStdNamespace()) |
1540 | Complain = false; |
1541 | } |
1542 | } |
1543 | |
1544 | TemplateParameterList *PrevParams |
1545 | = PrevClassTemplate->getMostRecentDecl()->getTemplateParameters(); |
1546 | |
1547 | // Make sure the parameter lists match. |
1548 | if (!SemaRef.TemplateParameterListsAreEqual(InstParams, PrevParams, |
1549 | Complain, |
1550 | Sema::TPL_TemplateMatch)) { |
1551 | if (Complain) |
1552 | return nullptr; |
1553 | |
1554 | AdoptedPreviousTemplateParams = true; |
1555 | InstParams = PrevParams; |
1556 | } |
1557 | |
1558 | // Do some additional validation, then merge default arguments |
1559 | // from the existing declarations. |
1560 | if (!AdoptedPreviousTemplateParams && |
1561 | SemaRef.CheckTemplateParameterList(InstParams, PrevParams, |
1562 | Sema::TPC_ClassTemplate)) |
1563 | return nullptr; |
1564 | } |
1565 | } |
1566 | |
1567 | CXXRecordDecl *RecordInst = CXXRecordDecl::Create( |
1568 | SemaRef.Context, Pattern->getTagKind(), DC, Pattern->getBeginLoc(), |
1569 | Pattern->getLocation(), Pattern->getIdentifier(), PrevDecl, |
1570 | /*DelayTypeCreation=*/true); |
1571 | |
1572 | if (QualifierLoc) |
1573 | RecordInst->setQualifierInfo(QualifierLoc); |
1574 | |
1575 | SemaRef.InstantiateAttrsForDecl(TemplateArgs, Pattern, RecordInst, LateAttrs, |
1576 | StartingScope); |
1577 | |
1578 | ClassTemplateDecl *Inst |
1579 | = ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(), |
1580 | D->getIdentifier(), InstParams, RecordInst); |
1581 | assert(!(isFriend && Owner->isDependentContext()))((!(isFriend && Owner->isDependentContext())) ? static_cast <void> (0) : __assert_fail ("!(isFriend && Owner->isDependentContext())" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1581, __PRETTY_FUNCTION__)); |
1582 | Inst->setPreviousDecl(PrevClassTemplate); |
1583 | |
1584 | RecordInst->setDescribedClassTemplate(Inst); |
1585 | |
1586 | if (isFriend) { |
1587 | if (PrevClassTemplate) |
1588 | Inst->setAccess(PrevClassTemplate->getAccess()); |
1589 | else |
1590 | Inst->setAccess(D->getAccess()); |
1591 | |
1592 | Inst->setObjectOfFriendDecl(); |
1593 | // TODO: do we want to track the instantiation progeny of this |
1594 | // friend target decl? |
1595 | } else { |
1596 | Inst->setAccess(D->getAccess()); |
1597 | if (!PrevClassTemplate) |
1598 | Inst->setInstantiatedFromMemberTemplate(D); |
1599 | } |
1600 | |
1601 | // Trigger creation of the type for the instantiation. |
1602 | SemaRef.Context.getInjectedClassNameType(RecordInst, |
1603 | Inst->getInjectedClassNameSpecialization()); |
1604 | |
1605 | // Finish handling of friends. |
1606 | if (isFriend) { |
1607 | DC->makeDeclVisibleInContext(Inst); |
1608 | Inst->setLexicalDeclContext(Owner); |
1609 | RecordInst->setLexicalDeclContext(Owner); |
1610 | return Inst; |
1611 | } |
1612 | |
1613 | if (D->isOutOfLine()) { |
1614 | Inst->setLexicalDeclContext(D->getLexicalDeclContext()); |
1615 | RecordInst->setLexicalDeclContext(D->getLexicalDeclContext()); |
1616 | } |
1617 | |
1618 | Owner->addDecl(Inst); |
1619 | |
1620 | if (!PrevClassTemplate) { |
1621 | // Queue up any out-of-line partial specializations of this member |
1622 | // class template; the client will force their instantiation once |
1623 | // the enclosing class has been instantiated. |
1624 | SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
1625 | D->getPartialSpecializations(PartialSpecs); |
1626 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) |
1627 | if (PartialSpecs[I]->getFirstDecl()->isOutOfLine()) |
1628 | OutOfLinePartialSpecs.push_back(std::make_pair(Inst, PartialSpecs[I])); |
1629 | } |
1630 | |
1631 | return Inst; |
1632 | } |
1633 | |
1634 | Decl * |
1635 | TemplateDeclInstantiator::VisitClassTemplatePartialSpecializationDecl( |
1636 | ClassTemplatePartialSpecializationDecl *D) { |
1637 | ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate(); |
1638 | |
1639 | // Lookup the already-instantiated declaration in the instantiation |
1640 | // of the class template and return that. |
1641 | DeclContext::lookup_result Found |
1642 | = Owner->lookup(ClassTemplate->getDeclName()); |
1643 | if (Found.empty()) |
1644 | return nullptr; |
1645 | |
1646 | ClassTemplateDecl *InstClassTemplate |
1647 | = dyn_cast<ClassTemplateDecl>(Found.front()); |
1648 | if (!InstClassTemplate) |
1649 | return nullptr; |
1650 | |
1651 | if (ClassTemplatePartialSpecializationDecl *Result |
1652 | = InstClassTemplate->findPartialSpecInstantiatedFromMember(D)) |
1653 | return Result; |
1654 | |
1655 | return InstantiateClassTemplatePartialSpecialization(InstClassTemplate, D); |
1656 | } |
1657 | |
1658 | Decl *TemplateDeclInstantiator::VisitVarTemplateDecl(VarTemplateDecl *D) { |
1659 | assert(D->getTemplatedDecl()->isStaticDataMember() &&((D->getTemplatedDecl()->isStaticDataMember() && "Only static data member templates are allowed.") ? static_cast <void> (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1660, __PRETTY_FUNCTION__)) |
1660 | "Only static data member templates are allowed.")((D->getTemplatedDecl()->isStaticDataMember() && "Only static data member templates are allowed.") ? static_cast <void> (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1660, __PRETTY_FUNCTION__)); |
1661 | |
1662 | // Create a local instantiation scope for this variable template, which |
1663 | // will contain the instantiations of the template parameters. |
1664 | LocalInstantiationScope Scope(SemaRef); |
1665 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
1666 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
1667 | if (!InstParams) |
1668 | return nullptr; |
1669 | |
1670 | VarDecl *Pattern = D->getTemplatedDecl(); |
1671 | VarTemplateDecl *PrevVarTemplate = nullptr; |
1672 | |
1673 | if (getPreviousDeclForInstantiation(Pattern)) { |
1674 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
1675 | if (!Found.empty()) |
1676 | PrevVarTemplate = dyn_cast<VarTemplateDecl>(Found.front()); |
1677 | } |
1678 | |
1679 | VarDecl *VarInst = |
1680 | cast_or_null<VarDecl>(VisitVarDecl(Pattern, |
1681 | /*InstantiatingVarTemplate=*/true)); |
1682 | if (!VarInst) return nullptr; |
1683 | |
1684 | DeclContext *DC = Owner; |
1685 | |
1686 | VarTemplateDecl *Inst = VarTemplateDecl::Create( |
1687 | SemaRef.Context, DC, D->getLocation(), D->getIdentifier(), InstParams, |
1688 | VarInst); |
1689 | VarInst->setDescribedVarTemplate(Inst); |
1690 | Inst->setPreviousDecl(PrevVarTemplate); |
1691 | |
1692 | Inst->setAccess(D->getAccess()); |
1693 | if (!PrevVarTemplate) |
1694 | Inst->setInstantiatedFromMemberTemplate(D); |
1695 | |
1696 | if (D->isOutOfLine()) { |
1697 | Inst->setLexicalDeclContext(D->getLexicalDeclContext()); |
1698 | VarInst->setLexicalDeclContext(D->getLexicalDeclContext()); |
1699 | } |
1700 | |
1701 | Owner->addDecl(Inst); |
1702 | |
1703 | if (!PrevVarTemplate) { |
1704 | // Queue up any out-of-line partial specializations of this member |
1705 | // variable template; the client will force their instantiation once |
1706 | // the enclosing class has been instantiated. |
1707 | SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
1708 | D->getPartialSpecializations(PartialSpecs); |
1709 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) |
1710 | if (PartialSpecs[I]->getFirstDecl()->isOutOfLine()) |
1711 | OutOfLineVarPartialSpecs.push_back( |
1712 | std::make_pair(Inst, PartialSpecs[I])); |
1713 | } |
1714 | |
1715 | return Inst; |
1716 | } |
1717 | |
1718 | Decl *TemplateDeclInstantiator::VisitVarTemplatePartialSpecializationDecl( |
1719 | VarTemplatePartialSpecializationDecl *D) { |
1720 | assert(D->isStaticDataMember() &&((D->isStaticDataMember() && "Only static data member templates are allowed." ) ? static_cast<void> (0) : __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1721, __PRETTY_FUNCTION__)) |
1721 | "Only static data member templates are allowed.")((D->isStaticDataMember() && "Only static data member templates are allowed." ) ? static_cast<void> (0) : __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1721, __PRETTY_FUNCTION__)); |
1722 | |
1723 | VarTemplateDecl *VarTemplate = D->getSpecializedTemplate(); |
1724 | |
1725 | // Lookup the already-instantiated declaration and return that. |
1726 | DeclContext::lookup_result Found = Owner->lookup(VarTemplate->getDeclName()); |
1727 | assert(!Found.empty() && "Instantiation found nothing?")((!Found.empty() && "Instantiation found nothing?") ? static_cast<void> (0) : __assert_fail ("!Found.empty() && \"Instantiation found nothing?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1727, __PRETTY_FUNCTION__)); |
1728 | |
1729 | VarTemplateDecl *InstVarTemplate = dyn_cast<VarTemplateDecl>(Found.front()); |
1730 | assert(InstVarTemplate && "Instantiation did not find a variable template?")((InstVarTemplate && "Instantiation did not find a variable template?" ) ? static_cast<void> (0) : __assert_fail ("InstVarTemplate && \"Instantiation did not find a variable template?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1730, __PRETTY_FUNCTION__)); |
1731 | |
1732 | if (VarTemplatePartialSpecializationDecl *Result = |
1733 | InstVarTemplate->findPartialSpecInstantiatedFromMember(D)) |
1734 | return Result; |
1735 | |
1736 | return InstantiateVarTemplatePartialSpecialization(InstVarTemplate, D); |
1737 | } |
1738 | |
1739 | Decl * |
1740 | TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) { |
1741 | // Create a local instantiation scope for this function template, which |
1742 | // will contain the instantiations of the template parameters and then get |
1743 | // merged with the local instantiation scope for the function template |
1744 | // itself. |
1745 | LocalInstantiationScope Scope(SemaRef); |
1746 | |
1747 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
1748 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
1749 | if (!InstParams) |
1750 | return nullptr; |
1751 | |
1752 | FunctionDecl *Instantiated = nullptr; |
1753 | if (CXXMethodDecl *DMethod = dyn_cast<CXXMethodDecl>(D->getTemplatedDecl())) |
1754 | Instantiated = cast_or_null<FunctionDecl>(VisitCXXMethodDecl(DMethod, |
1755 | InstParams)); |
1756 | else |
1757 | Instantiated = cast_or_null<FunctionDecl>(VisitFunctionDecl( |
1758 | D->getTemplatedDecl(), |
1759 | InstParams)); |
1760 | |
1761 | if (!Instantiated) |
1762 | return nullptr; |
1763 | |
1764 | // Link the instantiated function template declaration to the function |
1765 | // template from which it was instantiated. |
1766 | FunctionTemplateDecl *InstTemplate |
1767 | = Instantiated->getDescribedFunctionTemplate(); |
1768 | InstTemplate->setAccess(D->getAccess()); |
1769 | assert(InstTemplate &&((InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!" ) ? static_cast<void> (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1770, __PRETTY_FUNCTION__)) |
1770 | "VisitFunctionDecl/CXXMethodDecl didn't create a template!")((InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!" ) ? static_cast<void> (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1770, __PRETTY_FUNCTION__)); |
1771 | |
1772 | bool isFriend = (InstTemplate->getFriendObjectKind() != Decl::FOK_None); |
1773 | |
1774 | // Link the instantiation back to the pattern *unless* this is a |
1775 | // non-definition friend declaration. |
1776 | if (!InstTemplate->getInstantiatedFromMemberTemplate() && |
1777 | !(isFriend && !D->getTemplatedDecl()->isThisDeclarationADefinition())) |
1778 | InstTemplate->setInstantiatedFromMemberTemplate(D); |
1779 | |
1780 | // Make declarations visible in the appropriate context. |
1781 | if (!isFriend) { |
1782 | Owner->addDecl(InstTemplate); |
1783 | } else if (InstTemplate->getDeclContext()->isRecord() && |
1784 | !getPreviousDeclForInstantiation(D)) { |
1785 | SemaRef.CheckFriendAccess(InstTemplate); |
1786 | } |
1787 | |
1788 | return InstTemplate; |
1789 | } |
1790 | |
1791 | Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) { |
1792 | CXXRecordDecl *PrevDecl = nullptr; |
1793 | if (D->isInjectedClassName()) |
1794 | PrevDecl = cast<CXXRecordDecl>(Owner); |
1795 | else if (CXXRecordDecl *PatternPrev = getPreviousDeclForInstantiation(D)) { |
1796 | NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(), |
1797 | PatternPrev, |
1798 | TemplateArgs); |
1799 | if (!Prev) return nullptr; |
1800 | PrevDecl = cast<CXXRecordDecl>(Prev); |
1801 | } |
1802 | |
1803 | CXXRecordDecl *Record = CXXRecordDecl::Create( |
1804 | SemaRef.Context, D->getTagKind(), Owner, D->getBeginLoc(), |
1805 | D->getLocation(), D->getIdentifier(), PrevDecl); |
1806 | |
1807 | // Substitute the nested name specifier, if any. |
1808 | if (SubstQualifier(D, Record)) |
1809 | return nullptr; |
1810 | |
1811 | SemaRef.InstantiateAttrsForDecl(TemplateArgs, D, Record, LateAttrs, |
1812 | StartingScope); |
1813 | |
1814 | Record->setImplicit(D->isImplicit()); |
1815 | // FIXME: Check against AS_none is an ugly hack to work around the issue that |
1816 | // the tag decls introduced by friend class declarations don't have an access |
1817 | // specifier. Remove once this area of the code gets sorted out. |
1818 | if (D->getAccess() != AS_none) |
1819 | Record->setAccess(D->getAccess()); |
1820 | if (!D->isInjectedClassName()) |
1821 | Record->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation); |
1822 | |
1823 | // If the original function was part of a friend declaration, |
1824 | // inherit its namespace state. |
1825 | if (D->getFriendObjectKind()) |
1826 | Record->setObjectOfFriendDecl(); |
1827 | |
1828 | // Make sure that anonymous structs and unions are recorded. |
1829 | if (D->isAnonymousStructOrUnion()) |
1830 | Record->setAnonymousStructOrUnion(true); |
1831 | |
1832 | if (D->isLocalClass()) |
1833 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Record); |
1834 | |
1835 | // Forward the mangling number from the template to the instantiated decl. |
1836 | SemaRef.Context.setManglingNumber(Record, |
1837 | SemaRef.Context.getManglingNumber(D)); |
1838 | |
1839 | // See if the old tag was defined along with a declarator. |
1840 | // If it did, mark the new tag as being associated with that declarator. |
1841 | if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D)) |
1842 | SemaRef.Context.addDeclaratorForUnnamedTagDecl(Record, DD); |
1843 | |
1844 | // See if the old tag was defined along with a typedef. |
1845 | // If it did, mark the new tag as being associated with that typedef. |
1846 | if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D)) |
1847 | SemaRef.Context.addTypedefNameForUnnamedTagDecl(Record, TND); |
1848 | |
1849 | Owner->addDecl(Record); |
1850 | |
1851 | // DR1484 clarifies that the members of a local class are instantiated as part |
1852 | // of the instantiation of their enclosing entity. |
1853 | if (D->isCompleteDefinition() && D->isLocalClass()) { |
1854 | Sema::LocalEagerInstantiationScope LocalInstantiations(SemaRef); |
1855 | |
1856 | SemaRef.InstantiateClass(D->getLocation(), Record, D, TemplateArgs, |
1857 | TSK_ImplicitInstantiation, |
1858 | /*Complain=*/true); |
1859 | |
1860 | // For nested local classes, we will instantiate the members when we |
1861 | // reach the end of the outermost (non-nested) local class. |
1862 | if (!D->isCXXClassMember()) |
1863 | SemaRef.InstantiateClassMembers(D->getLocation(), Record, TemplateArgs, |
1864 | TSK_ImplicitInstantiation); |
1865 | |
1866 | // This class may have local implicit instantiations that need to be |
1867 | // performed within this scope. |
1868 | LocalInstantiations.perform(); |
1869 | } |
1870 | |
1871 | SemaRef.DiagnoseUnusedNestedTypedefs(Record); |
1872 | |
1873 | return Record; |
1874 | } |
1875 | |
1876 | /// Adjust the given function type for an instantiation of the |
1877 | /// given declaration, to cope with modifications to the function's type that |
1878 | /// aren't reflected in the type-source information. |
1879 | /// |
1880 | /// \param D The declaration we're instantiating. |
1881 | /// \param TInfo The already-instantiated type. |
1882 | static QualType adjustFunctionTypeForInstantiation(ASTContext &Context, |
1883 | FunctionDecl *D, |
1884 | TypeSourceInfo *TInfo) { |
1885 | const FunctionProtoType *OrigFunc |
1886 | = D->getType()->castAs<FunctionProtoType>(); |
1887 | const FunctionProtoType *NewFunc |
1888 | = TInfo->getType()->castAs<FunctionProtoType>(); |
1889 | if (OrigFunc->getExtInfo() == NewFunc->getExtInfo()) |
1890 | return TInfo->getType(); |
1891 | |
1892 | FunctionProtoType::ExtProtoInfo NewEPI = NewFunc->getExtProtoInfo(); |
1893 | NewEPI.ExtInfo = OrigFunc->getExtInfo(); |
1894 | return Context.getFunctionType(NewFunc->getReturnType(), |
1895 | NewFunc->getParamTypes(), NewEPI); |
1896 | } |
1897 | |
1898 | /// Normal class members are of more specific types and therefore |
1899 | /// don't make it here. This function serves three purposes: |
1900 | /// 1) instantiating function templates |
1901 | /// 2) substituting friend declarations |
1902 | /// 3) substituting deduction guide declarations for nested class templates |
1903 | Decl *TemplateDeclInstantiator::VisitFunctionDecl( |
1904 | FunctionDecl *D, TemplateParameterList *TemplateParams, |
1905 | RewriteKind FunctionRewriteKind) { |
1906 | // Check whether there is already a function template specialization for |
1907 | // this declaration. |
1908 | FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate(); |
1909 | if (FunctionTemplate && !TemplateParams) { |
1910 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
1911 | |
1912 | void *InsertPos = nullptr; |
1913 | FunctionDecl *SpecFunc |
1914 | = FunctionTemplate->findSpecialization(Innermost, InsertPos); |
1915 | |
1916 | // If we already have a function template specialization, return it. |
1917 | if (SpecFunc) |
1918 | return SpecFunc; |
1919 | } |
1920 | |
1921 | bool isFriend; |
1922 | if (FunctionTemplate) |
1923 | isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None); |
1924 | else |
1925 | isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
1926 | |
1927 | bool MergeWithParentScope = (TemplateParams != nullptr) || |
1928 | Owner->isFunctionOrMethod() || |
1929 | !(isa<Decl>(Owner) && |
1930 | cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod()); |
1931 | LocalInstantiationScope Scope(SemaRef, MergeWithParentScope); |
1932 | |
1933 | ExplicitSpecifier InstantiatedExplicitSpecifier; |
1934 | if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D)) { |
1935 | InstantiatedExplicitSpecifier = instantiateExplicitSpecifier( |
1936 | SemaRef, TemplateArgs, DGuide->getExplicitSpecifier(), DGuide); |
1937 | if (InstantiatedExplicitSpecifier.isInvalid()) |
1938 | return nullptr; |
1939 | } |
1940 | |
1941 | SmallVector<ParmVarDecl *, 4> Params; |
1942 | TypeSourceInfo *TInfo = SubstFunctionType(D, Params); |
1943 | if (!TInfo) |
1944 | return nullptr; |
1945 | QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo); |
1946 | |
1947 | if (TemplateParams && TemplateParams->size()) { |
1948 | auto *LastParam = |
1949 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->asArray().back()); |
1950 | if (LastParam && LastParam->isImplicit() && |
1951 | LastParam->hasTypeConstraint()) { |
1952 | // In abbreviated templates, the type-constraints of invented template |
1953 | // type parameters are instantiated with the function type, invalidating |
1954 | // the TemplateParameterList which relied on the template type parameter |
1955 | // not having a type constraint. Recreate the TemplateParameterList with |
1956 | // the updated parameter list. |
1957 | TemplateParams = TemplateParameterList::Create( |
1958 | SemaRef.Context, TemplateParams->getTemplateLoc(), |
1959 | TemplateParams->getLAngleLoc(), TemplateParams->asArray(), |
1960 | TemplateParams->getRAngleLoc(), TemplateParams->getRequiresClause()); |
1961 | } |
1962 | } |
1963 | |
1964 | NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc(); |
1965 | if (QualifierLoc) { |
1966 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
1967 | TemplateArgs); |
1968 | if (!QualifierLoc) |
1969 | return nullptr; |
1970 | } |
1971 | |
1972 | // FIXME: Concepts: Do not substitute into constraint expressions |
1973 | Expr *TrailingRequiresClause = D->getTrailingRequiresClause(); |
1974 | if (TrailingRequiresClause) { |
1975 | EnterExpressionEvaluationContext ConstantEvaluated( |
1976 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
1977 | ExprResult SubstRC = SemaRef.SubstExpr(TrailingRequiresClause, |
1978 | TemplateArgs); |
1979 | if (SubstRC.isInvalid()) |
1980 | return nullptr; |
1981 | TrailingRequiresClause = SubstRC.get(); |
1982 | if (!SemaRef.CheckConstraintExpression(TrailingRequiresClause)) |
1983 | return nullptr; |
1984 | } |
1985 | |
1986 | // If we're instantiating a local function declaration, put the result |
1987 | // in the enclosing namespace; otherwise we need to find the instantiated |
1988 | // context. |
1989 | DeclContext *DC; |
1990 | if (D->isLocalExternDecl()) { |
1991 | DC = Owner; |
1992 | SemaRef.adjustContextForLocalExternDecl(DC); |
1993 | } else if (isFriend && QualifierLoc) { |
1994 | CXXScopeSpec SS; |
1995 | SS.Adopt(QualifierLoc); |
1996 | DC = SemaRef.computeDeclContext(SS); |
1997 | if (!DC) return nullptr; |
1998 | } else { |
1999 | DC = SemaRef.FindInstantiatedContext(D->getLocation(), D->getDeclContext(), |
2000 | TemplateArgs); |
2001 | } |
2002 | |
2003 | DeclarationNameInfo NameInfo |
2004 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
2005 | |
2006 | if (FunctionRewriteKind != RewriteKind::None) |
2007 | adjustForRewrite(FunctionRewriteKind, D, T, TInfo, NameInfo); |
2008 | |
2009 | FunctionDecl *Function; |
2010 | if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D)) { |
2011 | Function = CXXDeductionGuideDecl::Create( |
2012 | SemaRef.Context, DC, D->getInnerLocStart(), |
2013 | InstantiatedExplicitSpecifier, NameInfo, T, TInfo, |
2014 | D->getSourceRange().getEnd()); |
2015 | if (DGuide->isCopyDeductionCandidate()) |
2016 | cast<CXXDeductionGuideDecl>(Function)->setIsCopyDeductionCandidate(); |
2017 | Function->setAccess(D->getAccess()); |
2018 | } else { |
2019 | Function = FunctionDecl::Create( |
2020 | SemaRef.Context, DC, D->getInnerLocStart(), NameInfo, T, TInfo, |
2021 | D->getCanonicalDecl()->getStorageClass(), D->isInlineSpecified(), |
2022 | D->hasWrittenPrototype(), D->getConstexprKind(), |
2023 | TrailingRequiresClause); |
2024 | Function->setRangeEnd(D->getSourceRange().getEnd()); |
2025 | } |
2026 | |
2027 | if (D->isInlined()) |
2028 | Function->setImplicitlyInline(); |
2029 | |
2030 | if (QualifierLoc) |
2031 | Function->setQualifierInfo(QualifierLoc); |
2032 | |
2033 | if (D->isLocalExternDecl()) |
2034 | Function->setLocalExternDecl(); |
2035 | |
2036 | DeclContext *LexicalDC = Owner; |
2037 | if (!isFriend && D->isOutOfLine() && !D->isLocalExternDecl()) { |
2038 | assert(D->getDeclContext()->isFileContext())((D->getDeclContext()->isFileContext()) ? static_cast< void> (0) : __assert_fail ("D->getDeclContext()->isFileContext()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2038, __PRETTY_FUNCTION__)); |
2039 | LexicalDC = D->getDeclContext(); |
2040 | } |
2041 | |
2042 | Function->setLexicalDeclContext(LexicalDC); |
2043 | |
2044 | // Attach the parameters |
2045 | for (unsigned P = 0; P < Params.size(); ++P) |
2046 | if (Params[P]) |
2047 | Params[P]->setOwningFunction(Function); |
2048 | Function->setParams(Params); |
2049 | |
2050 | if (TrailingRequiresClause) |
2051 | Function->setTrailingRequiresClause(TrailingRequiresClause); |
2052 | |
2053 | if (TemplateParams) { |
2054 | // Our resulting instantiation is actually a function template, since we |
2055 | // are substituting only the outer template parameters. For example, given |
2056 | // |
2057 | // template<typename T> |
2058 | // struct X { |
2059 | // template<typename U> friend void f(T, U); |
2060 | // }; |
2061 | // |
2062 | // X<int> x; |
2063 | // |
2064 | // We are instantiating the friend function template "f" within X<int>, |
2065 | // which means substituting int for T, but leaving "f" as a friend function |
2066 | // template. |
2067 | // Build the function template itself. |
2068 | FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, DC, |
2069 | Function->getLocation(), |
2070 | Function->getDeclName(), |
2071 | TemplateParams, Function); |
2072 | Function->setDescribedFunctionTemplate(FunctionTemplate); |
2073 | |
2074 | FunctionTemplate->setLexicalDeclContext(LexicalDC); |
2075 | |
2076 | if (isFriend && D->isThisDeclarationADefinition()) { |
2077 | FunctionTemplate->setInstantiatedFromMemberTemplate( |
2078 | D->getDescribedFunctionTemplate()); |
2079 | } |
2080 | } else if (FunctionTemplate) { |
2081 | // Record this function template specialization. |
2082 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
2083 | Function->setFunctionTemplateSpecialization(FunctionTemplate, |
2084 | TemplateArgumentList::CreateCopy(SemaRef.Context, |
2085 | Innermost), |
2086 | /*InsertPos=*/nullptr); |
2087 | } else if (isFriend && D->isThisDeclarationADefinition()) { |
2088 | // Do not connect the friend to the template unless it's actually a |
2089 | // definition. We don't want non-template functions to be marked as being |
2090 | // template instantiations. |
2091 | Function->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation); |
2092 | } |
2093 | |
2094 | if (isFriend) { |
2095 | Function->setObjectOfFriendDecl(); |
2096 | if (FunctionTemplateDecl *FT = Function->getDescribedFunctionTemplate()) |
2097 | FT->setObjectOfFriendDecl(); |
2098 | } |
2099 | |
2100 | if (InitFunctionInstantiation(Function, D)) |
2101 | Function->setInvalidDecl(); |
2102 | |
2103 | bool IsExplicitSpecialization = false; |
2104 | |
2105 | LookupResult Previous( |
2106 | SemaRef, Function->getDeclName(), SourceLocation(), |
2107 | D->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage |
2108 | : Sema::LookupOrdinaryName, |
2109 | D->isLocalExternDecl() ? Sema::ForExternalRedeclaration |
2110 | : SemaRef.forRedeclarationInCurContext()); |
2111 | |
2112 | if (DependentFunctionTemplateSpecializationInfo *Info |
2113 | = D->getDependentSpecializationInfo()) { |
2114 | assert(isFriend && "non-friend has dependent specialization info?")((isFriend && "non-friend has dependent specialization info?" ) ? static_cast<void> (0) : __assert_fail ("isFriend && \"non-friend has dependent specialization info?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2114, __PRETTY_FUNCTION__)); |
2115 | |
2116 | // Instantiate the explicit template arguments. |
2117 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
2118 | Info->getRAngleLoc()); |
2119 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
2120 | ExplicitArgs, TemplateArgs)) |
2121 | return nullptr; |
2122 | |
2123 | // Map the candidate templates to their instantiations. |
2124 | for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) { |
2125 | Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(), |
2126 | Info->getTemplate(I), |
2127 | TemplateArgs); |
2128 | if (!Temp) return nullptr; |
2129 | |
2130 | Previous.addDecl(cast<FunctionTemplateDecl>(Temp)); |
2131 | } |
2132 | |
2133 | if (SemaRef.CheckFunctionTemplateSpecialization(Function, |
2134 | &ExplicitArgs, |
2135 | Previous)) |
2136 | Function->setInvalidDecl(); |
2137 | |
2138 | IsExplicitSpecialization = true; |
2139 | } else if (const ASTTemplateArgumentListInfo *Info = |
2140 | D->getTemplateSpecializationArgsAsWritten()) { |
2141 | // The name of this function was written as a template-id. |
2142 | SemaRef.LookupQualifiedName(Previous, DC); |
2143 | |
2144 | // Instantiate the explicit template arguments. |
2145 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
2146 | Info->getRAngleLoc()); |
2147 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
2148 | ExplicitArgs, TemplateArgs)) |
2149 | return nullptr; |
2150 | |
2151 | if (SemaRef.CheckFunctionTemplateSpecialization(Function, |
2152 | &ExplicitArgs, |
2153 | Previous)) |
2154 | Function->setInvalidDecl(); |
2155 | |
2156 | IsExplicitSpecialization = true; |
2157 | } else if (TemplateParams || !FunctionTemplate) { |
2158 | // Look only into the namespace where the friend would be declared to |
2159 | // find a previous declaration. This is the innermost enclosing namespace, |
2160 | // as described in ActOnFriendFunctionDecl. |
2161 | SemaRef.LookupQualifiedName(Previous, DC->getRedeclContext()); |
2162 | |
2163 | // In C++, the previous declaration we find might be a tag type |
2164 | // (class or enum). In this case, the new declaration will hide the |
2165 | // tag type. Note that this does does not apply if we're declaring a |
2166 | // typedef (C++ [dcl.typedef]p4). |
2167 | if (Previous.isSingleTagDecl()) |
2168 | Previous.clear(); |
2169 | |
2170 | // Filter out previous declarations that don't match the scope. The only |
2171 | // effect this has is to remove declarations found in inline namespaces |
2172 | // for friend declarations with unqualified names. |
2173 | SemaRef.FilterLookupForScope(Previous, DC, /*Scope*/ nullptr, |
2174 | /*ConsiderLinkage*/ true, |
2175 | QualifierLoc.hasQualifier()); |
2176 | } |
2177 | |
2178 | SemaRef.CheckFunctionDeclaration(/*Scope*/ nullptr, Function, Previous, |
2179 | IsExplicitSpecialization); |
2180 | |
2181 | // Check the template parameter list against the previous declaration. The |
2182 | // goal here is to pick up default arguments added since the friend was |
2183 | // declared; we know the template parameter lists match, since otherwise |
2184 | // we would not have picked this template as the previous declaration. |
2185 | if (isFriend && TemplateParams && FunctionTemplate->getPreviousDecl()) { |
2186 | SemaRef.CheckTemplateParameterList( |
2187 | TemplateParams, |
2188 | FunctionTemplate->getPreviousDecl()->getTemplateParameters(), |
2189 | Function->isThisDeclarationADefinition() |
2190 | ? Sema::TPC_FriendFunctionTemplateDefinition |
2191 | : Sema::TPC_FriendFunctionTemplate); |
2192 | } |
2193 | |
2194 | // If we're introducing a friend definition after the first use, trigger |
2195 | // instantiation. |
2196 | // FIXME: If this is a friend function template definition, we should check |
2197 | // to see if any specializations have been used. |
2198 | if (isFriend && D->isThisDeclarationADefinition() && Function->isUsed(false)) { |
2199 | if (MemberSpecializationInfo *MSInfo = |
2200 | Function->getMemberSpecializationInfo()) { |
2201 | if (MSInfo->getPointOfInstantiation().isInvalid()) { |
2202 | SourceLocation Loc = D->getLocation(); // FIXME |
2203 | MSInfo->setPointOfInstantiation(Loc); |
2204 | SemaRef.PendingLocalImplicitInstantiations.push_back( |
2205 | std::make_pair(Function, Loc)); |
2206 | } |
2207 | } |
2208 | } |
2209 | |
2210 | if (D->isExplicitlyDefaulted()) { |
2211 | if (SubstDefaultedFunction(Function, D)) |
2212 | return nullptr; |
2213 | } |
2214 | if (D->isDeleted()) |
2215 | SemaRef.SetDeclDeleted(Function, D->getLocation()); |
2216 | |
2217 | NamedDecl *PrincipalDecl = |
2218 | (TemplateParams ? cast<NamedDecl>(FunctionTemplate) : Function); |
2219 | |
2220 | // If this declaration lives in a different context from its lexical context, |
2221 | // add it to the corresponding lookup table. |
2222 | if (isFriend || |
2223 | (Function->isLocalExternDecl() && !Function->getPreviousDecl())) |
2224 | DC->makeDeclVisibleInContext(PrincipalDecl); |
2225 | |
2226 | if (Function->isOverloadedOperator() && !DC->isRecord() && |
2227 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) |
2228 | PrincipalDecl->setNonMemberOperator(); |
2229 | |
2230 | return Function; |
2231 | } |
2232 | |
2233 | Decl *TemplateDeclInstantiator::VisitCXXMethodDecl( |
2234 | CXXMethodDecl *D, TemplateParameterList *TemplateParams, |
2235 | Optional<const ASTTemplateArgumentListInfo *> ClassScopeSpecializationArgs, |
2236 | RewriteKind FunctionRewriteKind) { |
2237 | FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate(); |
2238 | if (FunctionTemplate && !TemplateParams) { |
2239 | // We are creating a function template specialization from a function |
2240 | // template. Check whether there is already a function template |
2241 | // specialization for this particular set of template arguments. |
2242 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
2243 | |
2244 | void *InsertPos = nullptr; |
2245 | FunctionDecl *SpecFunc |
2246 | = FunctionTemplate->findSpecialization(Innermost, InsertPos); |
2247 | |
2248 | // If we already have a function template specialization, return it. |
2249 | if (SpecFunc) |
2250 | return SpecFunc; |
2251 | } |
2252 | |
2253 | bool isFriend; |
2254 | if (FunctionTemplate) |
2255 | isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None); |
2256 | else |
2257 | isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
2258 | |
2259 | bool MergeWithParentScope = (TemplateParams != nullptr) || |
2260 | !(isa<Decl>(Owner) && |
2261 | cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod()); |
2262 | LocalInstantiationScope Scope(SemaRef, MergeWithParentScope); |
2263 | |
2264 | // Instantiate enclosing template arguments for friends. |
2265 | SmallVector<TemplateParameterList *, 4> TempParamLists; |
2266 | unsigned NumTempParamLists = 0; |
2267 | if (isFriend && (NumTempParamLists = D->getNumTemplateParameterLists())) { |
2268 | TempParamLists.resize(NumTempParamLists); |
2269 | for (unsigned I = 0; I != NumTempParamLists; ++I) { |
2270 | TemplateParameterList *TempParams = D->getTemplateParameterList(I); |
2271 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
2272 | if (!InstParams) |
2273 | return nullptr; |
2274 | TempParamLists[I] = InstParams; |
2275 | } |
2276 | } |
2277 | |
2278 | ExplicitSpecifier InstantiatedExplicitSpecifier = |
2279 | instantiateExplicitSpecifier(SemaRef, TemplateArgs, |
2280 | ExplicitSpecifier::getFromDecl(D), D); |
2281 | if (InstantiatedExplicitSpecifier.isInvalid()) |
2282 | return nullptr; |
2283 | |
2284 | SmallVector<ParmVarDecl *, 4> Params; |
2285 | TypeSourceInfo *TInfo = SubstFunctionType(D, Params); |
2286 | if (!TInfo) |
2287 | return nullptr; |
2288 | QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo); |
2289 | |
2290 | if (TemplateParams && TemplateParams->size()) { |
2291 | auto *LastParam = |
2292 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->asArray().back()); |
2293 | if (LastParam && LastParam->isImplicit() && |
2294 | LastParam->hasTypeConstraint()) { |
2295 | // In abbreviated templates, the type-constraints of invented template |
2296 | // type parameters are instantiated with the function type, invalidating |
2297 | // the TemplateParameterList which relied on the template type parameter |
2298 | // not having a type constraint. Recreate the TemplateParameterList with |
2299 | // the updated parameter list. |
2300 | TemplateParams = TemplateParameterList::Create( |
2301 | SemaRef.Context, TemplateParams->getTemplateLoc(), |
2302 | TemplateParams->getLAngleLoc(), TemplateParams->asArray(), |
2303 | TemplateParams->getRAngleLoc(), TemplateParams->getRequiresClause()); |
2304 | } |
2305 | } |
2306 | |
2307 | NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc(); |
2308 | if (QualifierLoc) { |
2309 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
2310 | TemplateArgs); |
2311 | if (!QualifierLoc) |
2312 | return nullptr; |
2313 | } |
2314 | |
2315 | // FIXME: Concepts: Do not substitute into constraint expressions |
2316 | Expr *TrailingRequiresClause = D->getTrailingRequiresClause(); |
2317 | if (TrailingRequiresClause) { |
2318 | EnterExpressionEvaluationContext ConstantEvaluated( |
2319 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
2320 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
2321 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, |
2322 | D->getMethodQualifiers(), ThisContext); |
2323 | ExprResult SubstRC = SemaRef.SubstExpr(TrailingRequiresClause, |
2324 | TemplateArgs); |
2325 | if (SubstRC.isInvalid()) |
2326 | return nullptr; |
2327 | TrailingRequiresClause = SubstRC.get(); |
2328 | if (!SemaRef.CheckConstraintExpression(TrailingRequiresClause)) |
2329 | return nullptr; |
2330 | } |
2331 | |
2332 | DeclContext *DC = Owner; |
2333 | if (isFriend) { |
2334 | if (QualifierLoc) { |
2335 | CXXScopeSpec SS; |
2336 | SS.Adopt(QualifierLoc); |
2337 | DC = SemaRef.computeDeclContext(SS); |
2338 | |
2339 | if (DC && SemaRef.RequireCompleteDeclContext(SS, DC)) |
2340 | return nullptr; |
2341 | } else { |
2342 | DC = SemaRef.FindInstantiatedContext(D->getLocation(), |
2343 | D->getDeclContext(), |
2344 | TemplateArgs); |
2345 | } |
2346 | if (!DC) return nullptr; |
2347 | } |
2348 | |
2349 | DeclarationNameInfo NameInfo |
2350 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
2351 | |
2352 | if (FunctionRewriteKind != RewriteKind::None) |
2353 | adjustForRewrite(FunctionRewriteKind, D, T, TInfo, NameInfo); |
2354 | |
2355 | // Build the instantiated method declaration. |
2356 | CXXRecordDecl *Record = cast<CXXRecordDecl>(DC); |
2357 | CXXMethodDecl *Method = nullptr; |
2358 | |
2359 | SourceLocation StartLoc = D->getInnerLocStart(); |
2360 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) { |
2361 | Method = CXXConstructorDecl::Create( |
2362 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
2363 | InstantiatedExplicitSpecifier, Constructor->isInlineSpecified(), false, |
2364 | Constructor->getConstexprKind(), InheritedConstructor(), |
2365 | TrailingRequiresClause); |
2366 | Method->setRangeEnd(Constructor->getEndLoc()); |
2367 | } else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(D)) { |
2368 | Method = CXXDestructorDecl::Create( |
2369 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
2370 | Destructor->isInlineSpecified(), false, Destructor->getConstexprKind(), |
2371 | TrailingRequiresClause); |
2372 | Method->setRangeEnd(Destructor->getEndLoc()); |
2373 | } else if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) { |
2374 | Method = CXXConversionDecl::Create( |
2375 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
2376 | Conversion->isInlineSpecified(), InstantiatedExplicitSpecifier, |
2377 | Conversion->getConstexprKind(), Conversion->getEndLoc(), |
2378 | TrailingRequiresClause); |
2379 | } else { |
2380 | StorageClass SC = D->isStatic() ? SC_Static : SC_None; |
2381 | Method = CXXMethodDecl::Create(SemaRef.Context, Record, StartLoc, NameInfo, |
2382 | T, TInfo, SC, D->isInlineSpecified(), |
2383 | D->getConstexprKind(), D->getEndLoc(), |
2384 | TrailingRequiresClause); |
2385 | } |
2386 | |
2387 | if (D->isInlined()) |
2388 | Method->setImplicitlyInline(); |
2389 | |
2390 | if (QualifierLoc) |
2391 | Method->setQualifierInfo(QualifierLoc); |
2392 | |
2393 | if (TemplateParams) { |
2394 | // Our resulting instantiation is actually a function template, since we |
2395 | // are substituting only the outer template parameters. For example, given |
2396 | // |
2397 | // template<typename T> |
2398 | // struct X { |
2399 | // template<typename U> void f(T, U); |
2400 | // }; |
2401 | // |
2402 | // X<int> x; |
2403 | // |
2404 | // We are instantiating the member template "f" within X<int>, which means |
2405 | // substituting int for T, but leaving "f" as a member function template. |
2406 | // Build the function template itself. |
2407 | FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, Record, |
2408 | Method->getLocation(), |
2409 | Method->getDeclName(), |
2410 | TemplateParams, Method); |
2411 | if (isFriend) { |
2412 | FunctionTemplate->setLexicalDeclContext(Owner); |
2413 | FunctionTemplate->setObjectOfFriendDecl(); |
2414 | } else if (D->isOutOfLine()) |
2415 | FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext()); |
2416 | Method->setDescribedFunctionTemplate(FunctionTemplate); |
2417 | } else if (FunctionTemplate) { |
2418 | // Record this function template specialization. |
2419 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
2420 | Method->setFunctionTemplateSpecialization(FunctionTemplate, |
2421 | TemplateArgumentList::CreateCopy(SemaRef.Context, |
2422 | Innermost), |
2423 | /*InsertPos=*/nullptr); |
2424 | } else if (!isFriend) { |
2425 | // Record that this is an instantiation of a member function. |
2426 | Method->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation); |
2427 | } |
2428 | |
2429 | // If we are instantiating a member function defined |
2430 | // out-of-line, the instantiation will have the same lexical |
2431 | // context (which will be a namespace scope) as the template. |
2432 | if (isFriend) { |
2433 | if (NumTempParamLists) |
2434 | Method->setTemplateParameterListsInfo( |
2435 | SemaRef.Context, |
2436 | llvm::makeArrayRef(TempParamLists.data(), NumTempParamLists)); |
2437 | |
2438 | Method->setLexicalDeclContext(Owner); |
2439 | Method->setObjectOfFriendDecl(); |
2440 | } else if (D->isOutOfLine()) |
2441 | Method->setLexicalDeclContext(D->getLexicalDeclContext()); |
2442 | |
2443 | // Attach the parameters |
2444 | for (unsigned P = 0; P < Params.size(); ++P) |
2445 | Params[P]->setOwningFunction(Method); |
2446 | Method->setParams(Params); |
2447 | |
2448 | if (InitMethodInstantiation(Method, D)) |
2449 | Method->setInvalidDecl(); |
2450 | |
2451 | LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName, |
2452 | Sema::ForExternalRedeclaration); |
2453 | |
2454 | bool IsExplicitSpecialization = false; |
2455 | |
2456 | // If the name of this function was written as a template-id, instantiate |
2457 | // the explicit template arguments. |
2458 | if (DependentFunctionTemplateSpecializationInfo *Info |
2459 | = D->getDependentSpecializationInfo()) { |
2460 | assert(isFriend && "non-friend has dependent specialization info?")((isFriend && "non-friend has dependent specialization info?" ) ? static_cast<void> (0) : __assert_fail ("isFriend && \"non-friend has dependent specialization info?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2460, __PRETTY_FUNCTION__)); |
2461 | |
2462 | // Instantiate the explicit template arguments. |
2463 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
2464 | Info->getRAngleLoc()); |
2465 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
2466 | ExplicitArgs, TemplateArgs)) |
2467 | return nullptr; |
2468 | |
2469 | // Map the candidate templates to their instantiations. |
2470 | for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) { |
2471 | Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(), |
2472 | Info->getTemplate(I), |
2473 | TemplateArgs); |
2474 | if (!Temp) return nullptr; |
2475 | |
2476 | Previous.addDecl(cast<FunctionTemplateDecl>(Temp)); |
2477 | } |
2478 | |
2479 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, |
2480 | &ExplicitArgs, |
2481 | Previous)) |
2482 | Method->setInvalidDecl(); |
2483 | |
2484 | IsExplicitSpecialization = true; |
2485 | } else if (const ASTTemplateArgumentListInfo *Info = |
2486 | ClassScopeSpecializationArgs.getValueOr( |
2487 | D->getTemplateSpecializationArgsAsWritten())) { |
2488 | SemaRef.LookupQualifiedName(Previous, DC); |
2489 | |
2490 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
2491 | Info->getRAngleLoc()); |
2492 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
2493 | ExplicitArgs, TemplateArgs)) |
2494 | return nullptr; |
2495 | |
2496 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, |
2497 | &ExplicitArgs, |
2498 | Previous)) |
2499 | Method->setInvalidDecl(); |
2500 | |
2501 | IsExplicitSpecialization = true; |
2502 | } else if (ClassScopeSpecializationArgs) { |
2503 | // Class-scope explicit specialization written without explicit template |
2504 | // arguments. |
2505 | SemaRef.LookupQualifiedName(Previous, DC); |
2506 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, nullptr, Previous)) |
2507 | Method->setInvalidDecl(); |
2508 | |
2509 | IsExplicitSpecialization = true; |
2510 | } else if (!FunctionTemplate || TemplateParams || isFriend) { |
2511 | SemaRef.LookupQualifiedName(Previous, Record); |
2512 | |
2513 | // In C++, the previous declaration we find might be a tag type |
2514 | // (class or enum). In this case, the new declaration will hide the |
2515 | // tag type. Note that this does does not apply if we're declaring a |
2516 | // typedef (C++ [dcl.typedef]p4). |
2517 | if (Previous.isSingleTagDecl()) |
2518 | Previous.clear(); |
2519 | } |
2520 | |
2521 | SemaRef.CheckFunctionDeclaration(nullptr, Method, Previous, |
2522 | IsExplicitSpecialization); |
2523 | |
2524 | if (D->isPure()) |
2525 | SemaRef.CheckPureMethod(Method, SourceRange()); |
2526 | |
2527 | // Propagate access. For a non-friend declaration, the access is |
2528 | // whatever we're propagating from. For a friend, it should be the |
2529 | // previous declaration we just found. |
2530 | if (isFriend && Method->getPreviousDecl()) |
2531 | Method->setAccess(Method->getPreviousDecl()->getAccess()); |
2532 | else |
2533 | Method->setAccess(D->getAccess()); |
2534 | if (FunctionTemplate) |
2535 | FunctionTemplate->setAccess(Method->getAccess()); |
2536 | |
2537 | SemaRef.CheckOverrideControl(Method); |
2538 | |
2539 | // If a function is defined as defaulted or deleted, mark it as such now. |
2540 | if (D->isExplicitlyDefaulted()) { |
2541 | if (SubstDefaultedFunction(Method, D)) |
2542 | return nullptr; |
2543 | } |
2544 | if (D->isDeletedAsWritten()) |
2545 | SemaRef.SetDeclDeleted(Method, Method->getLocation()); |
2546 | |
2547 | // If this is an explicit specialization, mark the implicitly-instantiated |
2548 | // template specialization as being an explicit specialization too. |
2549 | // FIXME: Is this necessary? |
2550 | if (IsExplicitSpecialization && !isFriend) |
2551 | SemaRef.CompleteMemberSpecialization(Method, Previous); |
2552 | |
2553 | // If there's a function template, let our caller handle it. |
2554 | if (FunctionTemplate) { |
2555 | // do nothing |
2556 | |
2557 | // Don't hide a (potentially) valid declaration with an invalid one. |
2558 | } else if (Method->isInvalidDecl() && !Previous.empty()) { |
2559 | // do nothing |
2560 | |
2561 | // Otherwise, check access to friends and make them visible. |
2562 | } else if (isFriend) { |
2563 | // We only need to re-check access for methods which we didn't |
2564 | // manage to match during parsing. |
2565 | if (!D->getPreviousDecl()) |
2566 | SemaRef.CheckFriendAccess(Method); |
2567 | |
2568 | Record->makeDeclVisibleInContext(Method); |
2569 | |
2570 | // Otherwise, add the declaration. We don't need to do this for |
2571 | // class-scope specializations because we'll have matched them with |
2572 | // the appropriate template. |
2573 | } else { |
2574 | Owner->addDecl(Method); |
2575 | } |
2576 | |
2577 | // PR17480: Honor the used attribute to instantiate member function |
2578 | // definitions |
2579 | if (Method->hasAttr<UsedAttr>()) { |
2580 | if (const auto *A = dyn_cast<CXXRecordDecl>(Owner)) { |
2581 | SourceLocation Loc; |
2582 | if (const MemberSpecializationInfo *MSInfo = |
2583 | A->getMemberSpecializationInfo()) |
2584 | Loc = MSInfo->getPointOfInstantiation(); |
2585 | else if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(A)) |
2586 | Loc = Spec->getPointOfInstantiation(); |
2587 | SemaRef.MarkFunctionReferenced(Loc, Method); |
2588 | } |
2589 | } |
2590 | |
2591 | return Method; |
2592 | } |
2593 | |
2594 | Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) { |
2595 | return VisitCXXMethodDecl(D); |
2596 | } |
2597 | |
2598 | Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) { |
2599 | return VisitCXXMethodDecl(D); |
2600 | } |
2601 | |
2602 | Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) { |
2603 | return VisitCXXMethodDecl(D); |
2604 | } |
2605 | |
2606 | Decl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) { |
2607 | return SemaRef.SubstParmVarDecl(D, TemplateArgs, /*indexAdjustment*/ 0, None, |
2608 | /*ExpectParameterPack=*/ false); |
2609 | } |
2610 | |
2611 | Decl *TemplateDeclInstantiator::VisitTemplateTypeParmDecl( |
2612 | TemplateTypeParmDecl *D) { |
2613 | // TODO: don't always clone when decls are refcounted. |
2614 | assert(D->getTypeForDecl()->isTemplateTypeParmType())((D->getTypeForDecl()->isTemplateTypeParmType()) ? static_cast <void> (0) : __assert_fail ("D->getTypeForDecl()->isTemplateTypeParmType()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2614, __PRETTY_FUNCTION__)); |
2615 | |
2616 | Optional<unsigned> NumExpanded; |
2617 | |
2618 | if (const TypeConstraint *TC = D->getTypeConstraint()) { |
2619 | if (D->isPackExpansion() && !D->isExpandedParameterPack()) { |
2620 | assert(TC->getTemplateArgsAsWritten() &&((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)) |
2621 | "type parameter can only be an expansion when explicit arguments "((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)) |
2622 | "are specified")((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)); |
2623 | // The template type parameter pack's type is a pack expansion of types. |
2624 | // Determine whether we need to expand this parameter pack into separate |
2625 | // types. |
2626 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
2627 | for (auto &ArgLoc : TC->getTemplateArgsAsWritten()->arguments()) |
2628 | SemaRef.collectUnexpandedParameterPacks(ArgLoc, Unexpanded); |
2629 | |
2630 | // Determine whether the set of unexpanded parameter packs can and should |
2631 | // be expanded. |
2632 | bool Expand = true; |
2633 | bool RetainExpansion = false; |
2634 | if (SemaRef.CheckParameterPacksForExpansion( |
2635 | cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint()) |
2636 | ->getEllipsisLoc(), |
2637 | SourceRange(TC->getConceptNameLoc(), |
2638 | TC->hasExplicitTemplateArgs() ? |
2639 | TC->getTemplateArgsAsWritten()->getRAngleLoc() : |
2640 | TC->getConceptNameInfo().getEndLoc()), |
2641 | Unexpanded, TemplateArgs, Expand, RetainExpansion, NumExpanded)) |
2642 | return nullptr; |
2643 | } |
2644 | } |
2645 | |
2646 | TemplateTypeParmDecl *Inst = TemplateTypeParmDecl::Create( |
2647 | SemaRef.Context, Owner, D->getBeginLoc(), D->getLocation(), |
2648 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), D->getIndex(), |
2649 | D->getIdentifier(), D->wasDeclaredWithTypename(), D->isParameterPack(), |
2650 | D->hasTypeConstraint(), NumExpanded); |
2651 | |
2652 | Inst->setAccess(AS_public); |
2653 | Inst->setImplicit(D->isImplicit()); |
2654 | if (auto *TC = D->getTypeConstraint()) { |
2655 | if (!D->isImplicit()) { |
2656 | // Invented template parameter type constraints will be instantiated with |
2657 | // the corresponding auto-typed parameter as it might reference other |
2658 | // parameters. |
2659 | |
2660 | // TODO: Concepts: do not instantiate the constraint (delayed constraint |
2661 | // substitution) |
2662 | const ASTTemplateArgumentListInfo *TemplArgInfo |
2663 | = TC->getTemplateArgsAsWritten(); |
2664 | TemplateArgumentListInfo InstArgs; |
2665 | |
2666 | if (TemplArgInfo) { |
2667 | InstArgs.setLAngleLoc(TemplArgInfo->LAngleLoc); |
2668 | InstArgs.setRAngleLoc(TemplArgInfo->RAngleLoc); |
2669 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
2670 | TemplArgInfo->NumTemplateArgs, |
2671 | InstArgs, TemplateArgs)) |
2672 | return nullptr; |
2673 | } |
2674 | if (SemaRef.AttachTypeConstraint( |
2675 | TC->getNestedNameSpecifierLoc(), TC->getConceptNameInfo(), |
2676 | TC->getNamedConcept(), &InstArgs, Inst, |
2677 | D->isParameterPack() |
2678 | ? cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint()) |
2679 | ->getEllipsisLoc() |
2680 | : SourceLocation())) |
2681 | return nullptr; |
2682 | } |
2683 | } |
2684 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
2685 | TypeSourceInfo *InstantiatedDefaultArg = |
2686 | SemaRef.SubstType(D->getDefaultArgumentInfo(), TemplateArgs, |
2687 | D->getDefaultArgumentLoc(), D->getDeclName()); |
2688 | if (InstantiatedDefaultArg) |
2689 | Inst->setDefaultArgument(InstantiatedDefaultArg); |
2690 | } |
2691 | |
2692 | // Introduce this template parameter's instantiation into the instantiation |
2693 | // scope. |
2694 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
2695 | |
2696 | return Inst; |
2697 | } |
2698 | |
2699 | Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl( |
2700 | NonTypeTemplateParmDecl *D) { |
2701 | // Substitute into the type of the non-type template parameter. |
2702 | TypeLoc TL = D->getTypeSourceInfo()->getTypeLoc(); |
2703 | SmallVector<TypeSourceInfo *, 4> ExpandedParameterPackTypesAsWritten; |
2704 | SmallVector<QualType, 4> ExpandedParameterPackTypes; |
2705 | bool IsExpandedParameterPack = false; |
2706 | TypeSourceInfo *DI; |
2707 | QualType T; |
2708 | bool Invalid = false; |
2709 | |
2710 | if (D->isExpandedParameterPack()) { |
2711 | // The non-type template parameter pack is an already-expanded pack |
2712 | // expansion of types. Substitute into each of the expanded types. |
2713 | ExpandedParameterPackTypes.reserve(D->getNumExpansionTypes()); |
2714 | ExpandedParameterPackTypesAsWritten.reserve(D->getNumExpansionTypes()); |
2715 | for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) { |
2716 | TypeSourceInfo *NewDI = |
2717 | SemaRef.SubstType(D->getExpansionTypeSourceInfo(I), TemplateArgs, |
2718 | D->getLocation(), D->getDeclName()); |
2719 | if (!NewDI) |
2720 | return nullptr; |
2721 | |
2722 | QualType NewT = |
2723 | SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation()); |
2724 | if (NewT.isNull()) |
2725 | return nullptr; |
2726 | |
2727 | ExpandedParameterPackTypesAsWritten.push_back(NewDI); |
2728 | ExpandedParameterPackTypes.push_back(NewT); |
2729 | } |
2730 | |
2731 | IsExpandedParameterPack = true; |
2732 | DI = D->getTypeSourceInfo(); |
2733 | T = DI->getType(); |
2734 | } else if (D->isPackExpansion()) { |
2735 | // The non-type template parameter pack's type is a pack expansion of types. |
2736 | // Determine whether we need to expand this parameter pack into separate |
2737 | // types. |
2738 | PackExpansionTypeLoc Expansion = TL.castAs<PackExpansionTypeLoc>(); |
2739 | TypeLoc Pattern = Expansion.getPatternLoc(); |
2740 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
2741 | SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded); |
2742 | |
2743 | // Determine whether the set of unexpanded parameter packs can and should |
2744 | // be expanded. |
2745 | bool Expand = true; |
2746 | bool RetainExpansion = false; |
2747 | Optional<unsigned> OrigNumExpansions |
2748 | = Expansion.getTypePtr()->getNumExpansions(); |
2749 | Optional<unsigned> NumExpansions = OrigNumExpansions; |
2750 | if (SemaRef.CheckParameterPacksForExpansion(Expansion.getEllipsisLoc(), |
2751 | Pattern.getSourceRange(), |
2752 | Unexpanded, |
2753 | TemplateArgs, |
2754 | Expand, RetainExpansion, |
2755 | NumExpansions)) |
2756 | return nullptr; |
2757 | |
2758 | if (Expand) { |
2759 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
2760 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
2761 | TypeSourceInfo *NewDI = SemaRef.SubstType(Pattern, TemplateArgs, |
2762 | D->getLocation(), |
2763 | D->getDeclName()); |
2764 | if (!NewDI) |
2765 | return nullptr; |
2766 | |
2767 | QualType NewT = |
2768 | SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation()); |
2769 | if (NewT.isNull()) |
2770 | return nullptr; |
2771 | |
2772 | ExpandedParameterPackTypesAsWritten.push_back(NewDI); |
2773 | ExpandedParameterPackTypes.push_back(NewT); |
2774 | } |
2775 | |
2776 | // Note that we have an expanded parameter pack. The "type" of this |
2777 | // expanded parameter pack is the original expansion type, but callers |
2778 | // will end up using the expanded parameter pack types for type-checking. |
2779 | IsExpandedParameterPack = true; |
2780 | DI = D->getTypeSourceInfo(); |
2781 | T = DI->getType(); |
2782 | } else { |
2783 | // We cannot fully expand the pack expansion now, so substitute into the |
2784 | // pattern and create a new pack expansion type. |
2785 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
2786 | TypeSourceInfo *NewPattern = SemaRef.SubstType(Pattern, TemplateArgs, |
2787 | D->getLocation(), |
2788 | D->getDeclName()); |
2789 | if (!NewPattern) |
2790 | return nullptr; |
2791 | |
2792 | SemaRef.CheckNonTypeTemplateParameterType(NewPattern, D->getLocation()); |
2793 | DI = SemaRef.CheckPackExpansion(NewPattern, Expansion.getEllipsisLoc(), |
2794 | NumExpansions); |
2795 | if (!DI) |
2796 | return nullptr; |
2797 | |
2798 | T = DI->getType(); |
2799 | } |
2800 | } else { |
2801 | // Simple case: substitution into a parameter that is not a parameter pack. |
2802 | DI = SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs, |
2803 | D->getLocation(), D->getDeclName()); |
2804 | if (!DI) |
2805 | return nullptr; |
2806 | |
2807 | // Check that this type is acceptable for a non-type template parameter. |
2808 | T = SemaRef.CheckNonTypeTemplateParameterType(DI, D->getLocation()); |
2809 | if (T.isNull()) { |
2810 | T = SemaRef.Context.IntTy; |
2811 | Invalid = true; |
2812 | } |
2813 | } |
2814 | |
2815 | NonTypeTemplateParmDecl *Param; |
2816 | if (IsExpandedParameterPack) |
2817 | Param = NonTypeTemplateParmDecl::Create( |
2818 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
2819 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
2820 | D->getPosition(), D->getIdentifier(), T, DI, ExpandedParameterPackTypes, |
2821 | ExpandedParameterPackTypesAsWritten); |
2822 | else |
2823 | Param = NonTypeTemplateParmDecl::Create( |
2824 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
2825 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
2826 | D->getPosition(), D->getIdentifier(), T, D->isParameterPack(), DI); |
2827 | |
2828 | if (AutoTypeLoc AutoLoc = DI->getTypeLoc().getContainedAutoTypeLoc()) |
2829 | if (AutoLoc.isConstrained()) |
2830 | if (SemaRef.AttachTypeConstraint( |
2831 | AutoLoc, Param, |
2832 | IsExpandedParameterPack |
2833 | ? DI->getTypeLoc().getAs<PackExpansionTypeLoc>() |
2834 | .getEllipsisLoc() |
2835 | : SourceLocation())) |
2836 | Invalid = true; |
2837 | |
2838 | Param->setAccess(AS_public); |
2839 | Param->setImplicit(D->isImplicit()); |
2840 | if (Invalid) |
2841 | Param->setInvalidDecl(); |
2842 | |
2843 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
2844 | EnterExpressionEvaluationContext ConstantEvaluated( |
2845 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
2846 | ExprResult Value = SemaRef.SubstExpr(D->getDefaultArgument(), TemplateArgs); |
2847 | if (!Value.isInvalid()) |
2848 | Param->setDefaultArgument(Value.get()); |
2849 | } |
2850 | |
2851 | // Introduce this template parameter's instantiation into the instantiation |
2852 | // scope. |
2853 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param); |
2854 | return Param; |
2855 | } |
2856 | |
2857 | static void collectUnexpandedParameterPacks( |
2858 | Sema &S, |
2859 | TemplateParameterList *Params, |
2860 | SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) { |
2861 | for (const auto &P : *Params) { |
2862 | if (P->isTemplateParameterPack()) |
2863 | continue; |
2864 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) |
2865 | S.collectUnexpandedParameterPacks(NTTP->getTypeSourceInfo()->getTypeLoc(), |
2866 | Unexpanded); |
2867 | if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(P)) |
2868 | collectUnexpandedParameterPacks(S, TTP->getTemplateParameters(), |
2869 | Unexpanded); |
2870 | } |
2871 | } |
2872 | |
2873 | Decl * |
2874 | TemplateDeclInstantiator::VisitTemplateTemplateParmDecl( |
2875 | TemplateTemplateParmDecl *D) { |
2876 | // Instantiate the template parameter list of the template template parameter. |
2877 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
2878 | TemplateParameterList *InstParams; |
2879 | SmallVector<TemplateParameterList*, 8> ExpandedParams; |
2880 | |
2881 | bool IsExpandedParameterPack = false; |
2882 | |
2883 | if (D->isExpandedParameterPack()) { |
2884 | // The template template parameter pack is an already-expanded pack |
2885 | // expansion of template parameters. Substitute into each of the expanded |
2886 | // parameters. |
2887 | ExpandedParams.reserve(D->getNumExpansionTemplateParameters()); |
2888 | for (unsigned I = 0, N = D->getNumExpansionTemplateParameters(); |
2889 | I != N; ++I) { |
2890 | LocalInstantiationScope Scope(SemaRef); |
2891 | TemplateParameterList *Expansion = |
2892 | SubstTemplateParams(D->getExpansionTemplateParameters(I)); |
2893 | if (!Expansion) |
2894 | return nullptr; |
2895 | ExpandedParams.push_back(Expansion); |
2896 | } |
2897 | |
2898 | IsExpandedParameterPack = true; |
2899 | InstParams = TempParams; |
2900 | } else if (D->isPackExpansion()) { |
2901 | // The template template parameter pack expands to a pack of template |
2902 | // template parameters. Determine whether we need to expand this parameter |
2903 | // pack into separate parameters. |
2904 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
2905 | collectUnexpandedParameterPacks(SemaRef, D->getTemplateParameters(), |
2906 | Unexpanded); |
2907 | |
2908 | // Determine whether the set of unexpanded parameter packs can and should |
2909 | // be expanded. |
2910 | bool Expand = true; |
2911 | bool RetainExpansion = false; |
2912 | Optional<unsigned> NumExpansions; |
2913 | if (SemaRef.CheckParameterPacksForExpansion(D->getLocation(), |
2914 | TempParams->getSourceRange(), |
2915 | Unexpanded, |
2916 | TemplateArgs, |
2917 | Expand, RetainExpansion, |
2918 | NumExpansions)) |
2919 | return nullptr; |
2920 | |
2921 | if (Expand) { |
2922 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
2923 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
2924 | LocalInstantiationScope Scope(SemaRef); |
2925 | TemplateParameterList *Expansion = SubstTemplateParams(TempParams); |
2926 | if (!Expansion) |
2927 | return nullptr; |
2928 | ExpandedParams.push_back(Expansion); |
2929 | } |
2930 | |
2931 | // Note that we have an expanded parameter pack. The "type" of this |
2932 | // expanded parameter pack is the original expansion type, but callers |
2933 | // will end up using the expanded parameter pack types for type-checking. |
2934 | IsExpandedParameterPack = true; |
2935 | InstParams = TempParams; |
2936 | } else { |
2937 | // We cannot fully expand the pack expansion now, so just substitute |
2938 | // into the pattern. |
2939 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
2940 | |
2941 | LocalInstantiationScope Scope(SemaRef); |
2942 | InstParams = SubstTemplateParams(TempParams); |
2943 | if (!InstParams) |
2944 | return nullptr; |
2945 | } |
2946 | } else { |
2947 | // Perform the actual substitution of template parameters within a new, |
2948 | // local instantiation scope. |
2949 | LocalInstantiationScope Scope(SemaRef); |
2950 | InstParams = SubstTemplateParams(TempParams); |
2951 | if (!InstParams) |
2952 | return nullptr; |
2953 | } |
2954 | |
2955 | // Build the template template parameter. |
2956 | TemplateTemplateParmDecl *Param; |
2957 | if (IsExpandedParameterPack) |
2958 | Param = TemplateTemplateParmDecl::Create( |
2959 | SemaRef.Context, Owner, D->getLocation(), |
2960 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
2961 | D->getPosition(), D->getIdentifier(), InstParams, ExpandedParams); |
2962 | else |
2963 | Param = TemplateTemplateParmDecl::Create( |
2964 | SemaRef.Context, Owner, D->getLocation(), |
2965 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
2966 | D->getPosition(), D->isParameterPack(), D->getIdentifier(), InstParams); |
2967 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
2968 | NestedNameSpecifierLoc QualifierLoc = |
2969 | D->getDefaultArgument().getTemplateQualifierLoc(); |
2970 | QualifierLoc = |
2971 | SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgs); |
2972 | TemplateName TName = SemaRef.SubstTemplateName( |
2973 | QualifierLoc, D->getDefaultArgument().getArgument().getAsTemplate(), |
2974 | D->getDefaultArgument().getTemplateNameLoc(), TemplateArgs); |
2975 | if (!TName.isNull()) |
2976 | Param->setDefaultArgument( |
2977 | SemaRef.Context, |
2978 | TemplateArgumentLoc(SemaRef.Context, TemplateArgument(TName), |
2979 | D->getDefaultArgument().getTemplateQualifierLoc(), |
2980 | D->getDefaultArgument().getTemplateNameLoc())); |
2981 | } |
2982 | Param->setAccess(AS_public); |
2983 | Param->setImplicit(D->isImplicit()); |
2984 | |
2985 | // Introduce this template parameter's instantiation into the instantiation |
2986 | // scope. |
2987 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param); |
2988 | |
2989 | return Param; |
2990 | } |
2991 | |
2992 | Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) { |
2993 | // Using directives are never dependent (and never contain any types or |
2994 | // expressions), so they require no explicit instantiation work. |
2995 | |
2996 | UsingDirectiveDecl *Inst |
2997 | = UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
2998 | D->getNamespaceKeyLocation(), |
2999 | D->getQualifierLoc(), |
3000 | D->getIdentLocation(), |
3001 | D->getNominatedNamespace(), |
3002 | D->getCommonAncestor()); |
3003 | |
3004 | // Add the using directive to its declaration context |
3005 | // only if this is not a function or method. |
3006 | if (!Owner->isFunctionOrMethod()) |
3007 | Owner->addDecl(Inst); |
3008 | |
3009 | return Inst; |
3010 | } |
3011 | |
3012 | Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) { |
3013 | |
3014 | // The nested name specifier may be dependent, for example |
3015 | // template <typename T> struct t { |
3016 | // struct s1 { T f1(); }; |
3017 | // struct s2 : s1 { using s1::f1; }; |
3018 | // }; |
3019 | // template struct t<int>; |
3020 | // Here, in using s1::f1, s1 refers to t<T>::s1; |
3021 | // we need to substitute for t<int>::s1. |
3022 | NestedNameSpecifierLoc QualifierLoc |
3023 | = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), |
3024 | TemplateArgs); |
3025 | if (!QualifierLoc) |
3026 | return nullptr; |
3027 | |
3028 | // For an inheriting constructor declaration, the name of the using |
3029 | // declaration is the name of a constructor in this class, not in the |
3030 | // base class. |
3031 | DeclarationNameInfo NameInfo = D->getNameInfo(); |
3032 | if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName) |
3033 | if (auto *RD = dyn_cast<CXXRecordDecl>(SemaRef.CurContext)) |
3034 | NameInfo.setName(SemaRef.Context.DeclarationNames.getCXXConstructorName( |
3035 | SemaRef.Context.getCanonicalType(SemaRef.Context.getRecordType(RD)))); |
3036 | |
3037 | // We only need to do redeclaration lookups if we're in a class |
3038 | // scope (in fact, it's not really even possible in non-class |
3039 | // scopes). |
3040 | bool CheckRedeclaration = Owner->isRecord(); |
3041 | |
3042 | LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName, |
3043 | Sema::ForVisibleRedeclaration); |
3044 | |
3045 | UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner, |
3046 | D->getUsingLoc(), |
3047 | QualifierLoc, |
3048 | NameInfo, |
3049 | D->hasTypename()); |
3050 | |
3051 | CXXScopeSpec SS; |
3052 | SS.Adopt(QualifierLoc); |
3053 | if (CheckRedeclaration) { |
3054 | Prev.setHideTags(false); |
3055 | SemaRef.LookupQualifiedName(Prev, Owner); |
3056 | |
3057 | // Check for invalid redeclarations. |
3058 | if (SemaRef.CheckUsingDeclRedeclaration(D->getUsingLoc(), |
3059 | D->hasTypename(), SS, |
3060 | D->getLocation(), Prev)) |
3061 | NewUD->setInvalidDecl(); |
3062 | |
3063 | } |
3064 | |
3065 | if (!NewUD->isInvalidDecl() && |
3066 | SemaRef.CheckUsingDeclQualifier(D->getUsingLoc(), D->hasTypename(), |
3067 | SS, NameInfo, D->getLocation())) |
3068 | NewUD->setInvalidDecl(); |
3069 | |
3070 | SemaRef.Context.setInstantiatedFromUsingDecl(NewUD, D); |
3071 | NewUD->setAccess(D->getAccess()); |
3072 | Owner->addDecl(NewUD); |
3073 | |
3074 | // Don't process the shadow decls for an invalid decl. |
3075 | if (NewUD->isInvalidDecl()) |
3076 | return NewUD; |
3077 | |
3078 | if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName) |
3079 | SemaRef.CheckInheritingConstructorUsingDecl(NewUD); |
3080 | |
3081 | bool isFunctionScope = Owner->isFunctionOrMethod(); |
3082 | |
3083 | // Process the shadow decls. |
3084 | for (auto *Shadow : D->shadows()) { |
3085 | // FIXME: UsingShadowDecl doesn't preserve its immediate target, so |
3086 | // reconstruct it in the case where it matters. |
3087 | NamedDecl *OldTarget = Shadow->getTargetDecl(); |
3088 | if (auto *CUSD = dyn_cast<ConstructorUsingShadowDecl>(Shadow)) |
3089 | if (auto *BaseShadow = CUSD->getNominatedBaseClassShadowDecl()) |
3090 | OldTarget = BaseShadow; |
3091 | |
3092 | NamedDecl *InstTarget = |
3093 | cast_or_null<NamedDecl>(SemaRef.FindInstantiatedDecl( |
3094 | Shadow->getLocation(), OldTarget, TemplateArgs)); |
3095 | if (!InstTarget) |
3096 | return nullptr; |
3097 | |
3098 | UsingShadowDecl *PrevDecl = nullptr; |
3099 | if (CheckRedeclaration) { |
3100 | if (SemaRef.CheckUsingShadowDecl(NewUD, InstTarget, Prev, PrevDecl)) |
3101 | continue; |
3102 | } else if (UsingShadowDecl *OldPrev = |
3103 | getPreviousDeclForInstantiation(Shadow)) { |
3104 | PrevDecl = cast_or_null<UsingShadowDecl>(SemaRef.FindInstantiatedDecl( |
3105 | Shadow->getLocation(), OldPrev, TemplateArgs)); |
3106 | } |
3107 | |
3108 | UsingShadowDecl *InstShadow = |
3109 | SemaRef.BuildUsingShadowDecl(/*Scope*/nullptr, NewUD, InstTarget, |
3110 | PrevDecl); |
3111 | SemaRef.Context.setInstantiatedFromUsingShadowDecl(InstShadow, Shadow); |
3112 | |
3113 | if (isFunctionScope) |
3114 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(Shadow, InstShadow); |
3115 | } |
3116 | |
3117 | return NewUD; |
3118 | } |
3119 | |
3120 | Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) { |
3121 | // Ignore these; we handle them in bulk when processing the UsingDecl. |
3122 | return nullptr; |
3123 | } |
3124 | |
3125 | Decl *TemplateDeclInstantiator::VisitConstructorUsingShadowDecl( |
3126 | ConstructorUsingShadowDecl *D) { |
3127 | // Ignore these; we handle them in bulk when processing the UsingDecl. |
3128 | return nullptr; |
3129 | } |
3130 | |
3131 | template <typename T> |
3132 | Decl *TemplateDeclInstantiator::instantiateUnresolvedUsingDecl( |
3133 | T *D, bool InstantiatingPackElement) { |
3134 | // If this is a pack expansion, expand it now. |
3135 | if (D->isPackExpansion() && !InstantiatingPackElement) { |
3136 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
3137 | SemaRef.collectUnexpandedParameterPacks(D->getQualifierLoc(), Unexpanded); |
3138 | SemaRef.collectUnexpandedParameterPacks(D->getNameInfo(), Unexpanded); |
3139 | |
3140 | // Determine whether the set of unexpanded parameter packs can and should |
3141 | // be expanded. |
3142 | bool Expand = true; |
3143 | bool RetainExpansion = false; |
3144 | Optional<unsigned> NumExpansions; |
3145 | if (SemaRef.CheckParameterPacksForExpansion( |
3146 | D->getEllipsisLoc(), D->getSourceRange(), Unexpanded, TemplateArgs, |
3147 | Expand, RetainExpansion, NumExpansions)) |
3148 | return nullptr; |
3149 | |
3150 | // This declaration cannot appear within a function template signature, |
3151 | // so we can't have a partial argument list for a parameter pack. |
3152 | assert(!RetainExpansion &&((!RetainExpansion && "should never need to retain an expansion for UsingPackDecl" ) ? static_cast<void> (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3153, __PRETTY_FUNCTION__)) |
3153 | "should never need to retain an expansion for UsingPackDecl")((!RetainExpansion && "should never need to retain an expansion for UsingPackDecl" ) ? static_cast<void> (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3153, __PRETTY_FUNCTION__)); |
3154 | |
3155 | if (!Expand) { |
3156 | // We cannot fully expand the pack expansion now, so substitute into the |
3157 | // pattern and create a new pack expansion. |
3158 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
3159 | return instantiateUnresolvedUsingDecl(D, true); |
3160 | } |
3161 | |
3162 | // Within a function, we don't have any normal way to check for conflicts |
3163 | // between shadow declarations from different using declarations in the |
3164 | // same pack expansion, but this is always ill-formed because all expansions |
3165 | // must produce (conflicting) enumerators. |
3166 | // |
3167 | // Sadly we can't just reject this in the template definition because it |
3168 | // could be valid if the pack is empty or has exactly one expansion. |
3169 | if (D->getDeclContext()->isFunctionOrMethod() && *NumExpansions > 1) { |
3170 | SemaRef.Diag(D->getEllipsisLoc(), |
3171 | diag::err_using_decl_redeclaration_expansion); |
3172 | return nullptr; |
3173 | } |
3174 | |
3175 | // Instantiate the slices of this pack and build a UsingPackDecl. |
3176 | SmallVector<NamedDecl*, 8> Expansions; |
3177 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
3178 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
3179 | Decl *Slice = instantiateUnresolvedUsingDecl(D, true); |
3180 | if (!Slice) |
3181 | return nullptr; |
3182 | // Note that we can still get unresolved using declarations here, if we |
3183 | // had arguments for all packs but the pattern also contained other |
3184 | // template arguments (this only happens during partial substitution, eg |
3185 | // into the body of a generic lambda in a function template). |
3186 | Expansions.push_back(cast<NamedDecl>(Slice)); |
3187 | } |
3188 | |
3189 | auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions); |
3190 | if (isDeclWithinFunction(D)) |
3191 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD); |
3192 | return NewD; |
3193 | } |
3194 | |
3195 | UnresolvedUsingTypenameDecl *TD = dyn_cast<UnresolvedUsingTypenameDecl>(D); |
3196 | SourceLocation TypenameLoc = TD ? TD->getTypenameLoc() : SourceLocation(); |
3197 | |
3198 | NestedNameSpecifierLoc QualifierLoc |
3199 | = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), |
3200 | TemplateArgs); |
3201 | if (!QualifierLoc) |
3202 | return nullptr; |
3203 | |
3204 | CXXScopeSpec SS; |
3205 | SS.Adopt(QualifierLoc); |
3206 | |
3207 | DeclarationNameInfo NameInfo |
3208 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
3209 | |
3210 | // Produce a pack expansion only if we're not instantiating a particular |
3211 | // slice of a pack expansion. |
3212 | bool InstantiatingSlice = D->getEllipsisLoc().isValid() && |
3213 | SemaRef.ArgumentPackSubstitutionIndex != -1; |
3214 | SourceLocation EllipsisLoc = |
3215 | InstantiatingSlice ? SourceLocation() : D->getEllipsisLoc(); |
3216 | |
3217 | NamedDecl *UD = SemaRef.BuildUsingDeclaration( |
3218 | /*Scope*/ nullptr, D->getAccess(), D->getUsingLoc(), |
3219 | /*HasTypename*/ TD, TypenameLoc, SS, NameInfo, EllipsisLoc, |
3220 | ParsedAttributesView(), |
3221 | /*IsInstantiation*/ true); |
3222 | if (UD) |
3223 | SemaRef.Context.setInstantiatedFromUsingDecl(UD, D); |
3224 | |
3225 | return UD; |
3226 | } |
3227 | |
3228 | Decl *TemplateDeclInstantiator::VisitUnresolvedUsingTypenameDecl( |
3229 | UnresolvedUsingTypenameDecl *D) { |
3230 | return instantiateUnresolvedUsingDecl(D); |
3231 | } |
3232 | |
3233 | Decl *TemplateDeclInstantiator::VisitUnresolvedUsingValueDecl( |
3234 | UnresolvedUsingValueDecl *D) { |
3235 | return instantiateUnresolvedUsingDecl(D); |
3236 | } |
3237 | |
3238 | Decl *TemplateDeclInstantiator::VisitUsingPackDecl(UsingPackDecl *D) { |
3239 | SmallVector<NamedDecl*, 8> Expansions; |
3240 | for (auto *UD : D->expansions()) { |
3241 | if (NamedDecl *NewUD = |
3242 | SemaRef.FindInstantiatedDecl(D->getLocation(), UD, TemplateArgs)) |
3243 | Expansions.push_back(NewUD); |
3244 | else |
3245 | return nullptr; |
3246 | } |
3247 | |
3248 | auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions); |
3249 | if (isDeclWithinFunction(D)) |
3250 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD); |
3251 | return NewD; |
3252 | } |
3253 | |
3254 | Decl *TemplateDeclInstantiator::VisitClassScopeFunctionSpecializationDecl( |
3255 | ClassScopeFunctionSpecializationDecl *Decl) { |
3256 | CXXMethodDecl *OldFD = Decl->getSpecialization(); |
3257 | return cast_or_null<CXXMethodDecl>( |
3258 | VisitCXXMethodDecl(OldFD, nullptr, Decl->getTemplateArgsAsWritten())); |
3259 | } |
3260 | |
3261 | Decl *TemplateDeclInstantiator::VisitOMPThreadPrivateDecl( |
3262 | OMPThreadPrivateDecl *D) { |
3263 | SmallVector<Expr *, 5> Vars; |
3264 | for (auto *I : D->varlists()) { |
3265 | Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get(); |
3266 | assert(isa<DeclRefExpr>(Var) && "threadprivate arg is not a DeclRefExpr")((isa<DeclRefExpr>(Var) && "threadprivate arg is not a DeclRefExpr" ) ? static_cast<void> (0) : __assert_fail ("isa<DeclRefExpr>(Var) && \"threadprivate arg is not a DeclRefExpr\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3266, __PRETTY_FUNCTION__)); |
3267 | Vars.push_back(Var); |
3268 | } |
3269 | |
3270 | OMPThreadPrivateDecl *TD = |
3271 | SemaRef.CheckOMPThreadPrivateDecl(D->getLocation(), Vars); |
3272 | |
3273 | TD->setAccess(AS_public); |
3274 | Owner->addDecl(TD); |
3275 | |
3276 | return TD; |
3277 | } |
3278 | |
3279 | Decl *TemplateDeclInstantiator::VisitOMPAllocateDecl(OMPAllocateDecl *D) { |
3280 | SmallVector<Expr *, 5> Vars; |
3281 | for (auto *I : D->varlists()) { |
3282 | Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get(); |
3283 | assert(isa<DeclRefExpr>(Var) && "allocate arg is not a DeclRefExpr")((isa<DeclRefExpr>(Var) && "allocate arg is not a DeclRefExpr" ) ? static_cast<void> (0) : __assert_fail ("isa<DeclRefExpr>(Var) && \"allocate arg is not a DeclRefExpr\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3283, __PRETTY_FUNCTION__)); |
3284 | Vars.push_back(Var); |
3285 | } |
3286 | SmallVector<OMPClause *, 4> Clauses; |
3287 | // Copy map clauses from the original mapper. |
3288 | for (OMPClause *C : D->clauselists()) { |
3289 | auto *AC = cast<OMPAllocatorClause>(C); |
3290 | ExprResult NewE = SemaRef.SubstExpr(AC->getAllocator(), TemplateArgs); |
3291 | if (!NewE.isUsable()) |
3292 | continue; |
3293 | OMPClause *IC = SemaRef.ActOnOpenMPAllocatorClause( |
3294 | NewE.get(), AC->getBeginLoc(), AC->getLParenLoc(), AC->getEndLoc()); |
3295 | Clauses.push_back(IC); |
3296 | } |
3297 | |
3298 | Sema::DeclGroupPtrTy Res = SemaRef.ActOnOpenMPAllocateDirective( |
3299 | D->getLocation(), Vars, Clauses, Owner); |
3300 | if (Res.get().isNull()) |
3301 | return nullptr; |
3302 | return Res.get().getSingleDecl(); |
3303 | } |
3304 | |
3305 | Decl *TemplateDeclInstantiator::VisitOMPRequiresDecl(OMPRequiresDecl *D) { |
3306 | llvm_unreachable(::llvm::llvm_unreachable_internal("Requires directive cannot be instantiated within a dependent context" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3307) |
3307 | "Requires directive cannot be instantiated within a dependent context")::llvm::llvm_unreachable_internal("Requires directive cannot be instantiated within a dependent context" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3307); |
3308 | } |
3309 | |
3310 | Decl *TemplateDeclInstantiator::VisitOMPDeclareReductionDecl( |
3311 | OMPDeclareReductionDecl *D) { |
3312 | // Instantiate type and check if it is allowed. |
3313 | const bool RequiresInstantiation = |
3314 | D->getType()->isDependentType() || |
3315 | D->getType()->isInstantiationDependentType() || |
3316 | D->getType()->containsUnexpandedParameterPack(); |
3317 | QualType SubstReductionType; |
3318 | if (RequiresInstantiation) { |
3319 | SubstReductionType = SemaRef.ActOnOpenMPDeclareReductionType( |
3320 | D->getLocation(), |
3321 | ParsedType::make(SemaRef.SubstType( |
3322 | D->getType(), TemplateArgs, D->getLocation(), DeclarationName()))); |
3323 | } else { |
3324 | SubstReductionType = D->getType(); |
3325 | } |
3326 | if (SubstReductionType.isNull()) |
3327 | return nullptr; |
3328 | Expr *Combiner = D->getCombiner(); |
3329 | Expr *Init = D->getInitializer(); |
3330 | bool IsCorrect = true; |
3331 | // Create instantiated copy. |
3332 | std::pair<QualType, SourceLocation> ReductionTypes[] = { |
3333 | std::make_pair(SubstReductionType, D->getLocation())}; |
3334 | auto *PrevDeclInScope = D->getPrevDeclInScope(); |
3335 | if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) { |
3336 | PrevDeclInScope = cast<OMPDeclareReductionDecl>( |
3337 | SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope) |
3338 | ->get<Decl *>()); |
3339 | } |
3340 | auto DRD = SemaRef.ActOnOpenMPDeclareReductionDirectiveStart( |
3341 | /*S=*/nullptr, Owner, D->getDeclName(), ReductionTypes, D->getAccess(), |
3342 | PrevDeclInScope); |
3343 | auto *NewDRD = cast<OMPDeclareReductionDecl>(DRD.get().getSingleDecl()); |
3344 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDRD); |
3345 | Expr *SubstCombiner = nullptr; |
3346 | Expr *SubstInitializer = nullptr; |
3347 | // Combiners instantiation sequence. |
3348 | if (Combiner) { |
3349 | SemaRef.ActOnOpenMPDeclareReductionCombinerStart( |
3350 | /*S=*/nullptr, NewDRD); |
3351 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
3352 | cast<DeclRefExpr>(D->getCombinerIn())->getDecl(), |
3353 | cast<DeclRefExpr>(NewDRD->getCombinerIn())->getDecl()); |
3354 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
3355 | cast<DeclRefExpr>(D->getCombinerOut())->getDecl(), |
3356 | cast<DeclRefExpr>(NewDRD->getCombinerOut())->getDecl()); |
3357 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
3358 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, Qualifiers(), |
3359 | ThisContext); |
3360 | SubstCombiner = SemaRef.SubstExpr(Combiner, TemplateArgs).get(); |
3361 | SemaRef.ActOnOpenMPDeclareReductionCombinerEnd(NewDRD, SubstCombiner); |
3362 | } |
3363 | // Initializers instantiation sequence. |
3364 | if (Init) { |
3365 | VarDecl *OmpPrivParm = SemaRef.ActOnOpenMPDeclareReductionInitializerStart( |
3366 | /*S=*/nullptr, NewDRD); |
3367 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
3368 | cast<DeclRefExpr>(D->getInitOrig())->getDecl(), |
3369 | cast<DeclRefExpr>(NewDRD->getInitOrig())->getDecl()); |
3370 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
3371 | cast<DeclRefExpr>(D->getInitPriv())->getDecl(), |
3372 | cast<DeclRefExpr>(NewDRD->getInitPriv())->getDecl()); |
3373 | if (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit) { |
3374 | SubstInitializer = SemaRef.SubstExpr(Init, TemplateArgs).get(); |
3375 | } else { |
3376 | auto *OldPrivParm = |
3377 | cast<VarDecl>(cast<DeclRefExpr>(D->getInitPriv())->getDecl()); |
3378 | IsCorrect = IsCorrect && OldPrivParm->hasInit(); |
3379 | if (IsCorrect) |
3380 | SemaRef.InstantiateVariableInitializer(OmpPrivParm, OldPrivParm, |
3381 | TemplateArgs); |
3382 | } |
3383 | SemaRef.ActOnOpenMPDeclareReductionInitializerEnd(NewDRD, SubstInitializer, |
3384 | OmpPrivParm); |
3385 | } |
3386 | IsCorrect = IsCorrect && SubstCombiner && |
3387 | (!Init || |
3388 | (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit && |
3389 | SubstInitializer) || |
3390 | (D->getInitializerKind() != OMPDeclareReductionDecl::CallInit && |
3391 | !SubstInitializer)); |
3392 | |
3393 | (void)SemaRef.ActOnOpenMPDeclareReductionDirectiveEnd( |
3394 | /*S=*/nullptr, DRD, IsCorrect && !D->isInvalidDecl()); |
3395 | |
3396 | return NewDRD; |
3397 | } |
3398 | |
3399 | Decl * |
3400 | TemplateDeclInstantiator::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) { |
3401 | // Instantiate type and check if it is allowed. |
3402 | const bool RequiresInstantiation = |
3403 | D->getType()->isDependentType() || |
3404 | D->getType()->isInstantiationDependentType() || |
3405 | D->getType()->containsUnexpandedParameterPack(); |
3406 | QualType SubstMapperTy; |
3407 | DeclarationName VN = D->getVarName(); |
3408 | if (RequiresInstantiation) { |
3409 | SubstMapperTy = SemaRef.ActOnOpenMPDeclareMapperType( |
3410 | D->getLocation(), |
3411 | ParsedType::make(SemaRef.SubstType(D->getType(), TemplateArgs, |
3412 | D->getLocation(), VN))); |
3413 | } else { |
3414 | SubstMapperTy = D->getType(); |
3415 | } |
3416 | if (SubstMapperTy.isNull()) |
3417 | return nullptr; |
3418 | // Create an instantiated copy of mapper. |
3419 | auto *PrevDeclInScope = D->getPrevDeclInScope(); |
3420 | if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) { |
3421 | PrevDeclInScope = cast<OMPDeclareMapperDecl>( |
3422 | SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope) |
3423 | ->get<Decl *>()); |
3424 | } |
3425 | bool IsCorrect = true; |
3426 | SmallVector<OMPClause *, 6> Clauses; |
3427 | // Instantiate the mapper variable. |
3428 | DeclarationNameInfo DirName; |
3429 | SemaRef.StartOpenMPDSABlock(llvm::omp::OMPD_declare_mapper, DirName, |
3430 | /*S=*/nullptr, |
3431 | (*D->clauselist_begin())->getBeginLoc()); |
3432 | ExprResult MapperVarRef = SemaRef.ActOnOpenMPDeclareMapperDirectiveVarDecl( |
3433 | /*S=*/nullptr, SubstMapperTy, D->getLocation(), VN); |
3434 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
3435 | cast<DeclRefExpr>(D->getMapperVarRef())->getDecl(), |
3436 | cast<DeclRefExpr>(MapperVarRef.get())->getDecl()); |
3437 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
3438 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, Qualifiers(), |
3439 | ThisContext); |
3440 | // Instantiate map clauses. |
3441 | for (OMPClause *C : D->clauselists()) { |
3442 | auto *OldC = cast<OMPMapClause>(C); |
3443 | SmallVector<Expr *, 4> NewVars; |
3444 | for (Expr *OE : OldC->varlists()) { |
3445 | Expr *NE = SemaRef.SubstExpr(OE, TemplateArgs).get(); |
3446 | if (!NE) { |
3447 | IsCorrect = false; |
3448 | break; |
3449 | } |
3450 | NewVars.push_back(NE); |
3451 | } |
3452 | if (!IsCorrect) |
3453 | break; |
3454 | NestedNameSpecifierLoc NewQualifierLoc = |
3455 | SemaRef.SubstNestedNameSpecifierLoc(OldC->getMapperQualifierLoc(), |
3456 | TemplateArgs); |
3457 | CXXScopeSpec SS; |
3458 | SS.Adopt(NewQualifierLoc); |
3459 | DeclarationNameInfo NewNameInfo = |
3460 | SemaRef.SubstDeclarationNameInfo(OldC->getMapperIdInfo(), TemplateArgs); |
3461 | OMPVarListLocTy Locs(OldC->getBeginLoc(), OldC->getLParenLoc(), |
3462 | OldC->getEndLoc()); |
3463 | OMPClause *NewC = SemaRef.ActOnOpenMPMapClause( |
3464 | OldC->getMapTypeModifiers(), OldC->getMapTypeModifiersLoc(), SS, |
3465 | NewNameInfo, OldC->getMapType(), OldC->isImplicitMapType(), |
3466 | OldC->getMapLoc(), OldC->getColonLoc(), NewVars, Locs); |
3467 | Clauses.push_back(NewC); |
3468 | } |
3469 | SemaRef.EndOpenMPDSABlock(nullptr); |
3470 | if (!IsCorrect) |
3471 | return nullptr; |
3472 | Sema::DeclGroupPtrTy DG = SemaRef.ActOnOpenMPDeclareMapperDirective( |
3473 | /*S=*/nullptr, Owner, D->getDeclName(), SubstMapperTy, D->getLocation(), |
3474 | VN, D->getAccess(), MapperVarRef.get(), Clauses, PrevDeclInScope); |
3475 | Decl *NewDMD = DG.get().getSingleDecl(); |
3476 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDMD); |
3477 | return NewDMD; |
3478 | } |
3479 | |
3480 | Decl *TemplateDeclInstantiator::VisitOMPCapturedExprDecl( |
3481 | OMPCapturedExprDecl * /*D*/) { |
3482 | llvm_unreachable("Should not be met in templates")::llvm::llvm_unreachable_internal("Should not be met in templates" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3482); |
3483 | } |
3484 | |
3485 | Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D) { |
3486 | return VisitFunctionDecl(D, nullptr); |
3487 | } |
3488 | |
3489 | Decl * |
3490 | TemplateDeclInstantiator::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) { |
3491 | Decl *Inst = VisitFunctionDecl(D, nullptr); |
3492 | if (Inst && !D->getDescribedFunctionTemplate()) |
3493 | Owner->addDecl(Inst); |
3494 | return Inst; |
3495 | } |
3496 | |
3497 | Decl *TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D) { |
3498 | return VisitCXXMethodDecl(D, nullptr); |
3499 | } |
3500 | |
3501 | Decl *TemplateDeclInstantiator::VisitRecordDecl(RecordDecl *D) { |
3502 | llvm_unreachable("There are only CXXRecordDecls in C++")::llvm::llvm_unreachable_internal("There are only CXXRecordDecls in C++" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3502); |
3503 | } |
3504 | |
3505 | Decl * |
3506 | TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl( |
3507 | ClassTemplateSpecializationDecl *D) { |
3508 | // As a MS extension, we permit class-scope explicit specialization |
3509 | // of member class templates. |
3510 | ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate(); |
3511 | assert(ClassTemplate->getDeclContext()->isRecord() &&((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
3512 | D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization &&((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
3513 | "can only instantiate an explicit specialization "((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
3514 | "for a member class template")((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)); |
3515 | |
3516 | // Lookup the already-instantiated declaration in the instantiation |
3517 | // of the class template. |
3518 | ClassTemplateDecl *InstClassTemplate = |
3519 | cast_or_null<ClassTemplateDecl>(SemaRef.FindInstantiatedDecl( |
3520 | D->getLocation(), ClassTemplate, TemplateArgs)); |
3521 | if (!InstClassTemplate) |
3522 | return nullptr; |
3523 | |
3524 | // Substitute into the template arguments of the class template explicit |
3525 | // specialization. |
3526 | TemplateSpecializationTypeLoc Loc = D->getTypeAsWritten()->getTypeLoc(). |
3527 | castAs<TemplateSpecializationTypeLoc>(); |
3528 | TemplateArgumentListInfo InstTemplateArgs(Loc.getLAngleLoc(), |
3529 | Loc.getRAngleLoc()); |
3530 | SmallVector<TemplateArgumentLoc, 4> ArgLocs; |
3531 | for (unsigned I = 0; I != Loc.getNumArgs(); ++I) |
3532 | ArgLocs.push_back(Loc.getArgLoc(I)); |
3533 | if (SemaRef.Subst(ArgLocs.data(), ArgLocs.size(), |
3534 | InstTemplateArgs, TemplateArgs)) |
3535 | return nullptr; |
3536 | |
3537 | // Check that the template argument list is well-formed for this |
3538 | // class template. |
3539 | SmallVector<TemplateArgument, 4> Converted; |
3540 | if (SemaRef.CheckTemplateArgumentList(InstClassTemplate, |
3541 | D->getLocation(), |
3542 | InstTemplateArgs, |
3543 | false, |
3544 | Converted, |
3545 | /*UpdateArgsWithConversion=*/true)) |
3546 | return nullptr; |
3547 | |
3548 | // Figure out where to insert this class template explicit specialization |
3549 | // in the member template's set of class template explicit specializations. |
3550 | void *InsertPos = nullptr; |
3551 | ClassTemplateSpecializationDecl *PrevDecl = |
3552 | InstClassTemplate->findSpecialization(Converted, InsertPos); |
3553 | |
3554 | // Check whether we've already seen a conflicting instantiation of this |
3555 | // declaration (for instance, if there was a prior implicit instantiation). |
3556 | bool Ignored; |
3557 | if (PrevDecl && |
3558 | SemaRef.CheckSpecializationInstantiationRedecl(D->getLocation(), |
3559 | D->getSpecializationKind(), |
3560 | PrevDecl, |
3561 | PrevDecl->getSpecializationKind(), |
3562 | PrevDecl->getPointOfInstantiation(), |
3563 | Ignored)) |
3564 | return nullptr; |
3565 | |
3566 | // If PrevDecl was a definition and D is also a definition, diagnose. |
3567 | // This happens in cases like: |
3568 | // |
3569 | // template<typename T, typename U> |
3570 | // struct Outer { |
3571 | // template<typename X> struct Inner; |
3572 | // template<> struct Inner<T> {}; |
3573 | // template<> struct Inner<U> {}; |
3574 | // }; |
3575 | // |
3576 | // Outer<int, int> outer; // error: the explicit specializations of Inner |
3577 | // // have the same signature. |
3578 | if (PrevDecl && PrevDecl->getDefinition() && |
3579 | D->isThisDeclarationADefinition()) { |
3580 | SemaRef.Diag(D->getLocation(), diag::err_redefinition) << PrevDecl; |
3581 | SemaRef.Diag(PrevDecl->getDefinition()->getLocation(), |
3582 | diag::note_previous_definition); |
3583 | return nullptr; |
3584 | } |
3585 | |
3586 | // Create the class template partial specialization declaration. |
3587 | ClassTemplateSpecializationDecl *InstD = |
3588 | ClassTemplateSpecializationDecl::Create( |
3589 | SemaRef.Context, D->getTagKind(), Owner, D->getBeginLoc(), |
3590 | D->getLocation(), InstClassTemplate, Converted, PrevDecl); |
3591 | |
3592 | // Add this partial specialization to the set of class template partial |
3593 | // specializations. |
3594 | if (!PrevDecl) |
3595 | InstClassTemplate->AddSpecialization(InstD, InsertPos); |
3596 | |
3597 | // Substitute the nested name specifier, if any. |
3598 | if (SubstQualifier(D, InstD)) |
3599 | return nullptr; |
3600 | |
3601 | // Build the canonical type that describes the converted template |
3602 | // arguments of the class template explicit specialization. |
3603 | QualType CanonType = SemaRef.Context.getTemplateSpecializationType( |
3604 | TemplateName(InstClassTemplate), Converted, |
3605 | SemaRef.Context.getRecordType(InstD)); |
3606 | |
3607 | // Build the fully-sugared type for this class template |
3608 | // specialization as the user wrote in the specialization |
3609 | // itself. This means that we'll pretty-print the type retrieved |
3610 | // from the specialization's declaration the way that the user |
3611 | // actually wrote the specialization, rather than formatting the |
3612 | // name based on the "canonical" representation used to store the |
3613 | // template arguments in the specialization. |
3614 | TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo( |
3615 | TemplateName(InstClassTemplate), D->getLocation(), InstTemplateArgs, |
3616 | CanonType); |
3617 | |
3618 | InstD->setAccess(D->getAccess()); |
3619 | InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation); |
3620 | InstD->setSpecializationKind(D->getSpecializationKind()); |
3621 | InstD->setTypeAsWritten(WrittenTy); |
3622 | InstD->setExternLoc(D->getExternLoc()); |
3623 | InstD->setTemplateKeywordLoc(D->getTemplateKeywordLoc()); |
3624 | |
3625 | Owner->addDecl(InstD); |
3626 | |
3627 | // Instantiate the members of the class-scope explicit specialization eagerly. |
3628 | // We don't have support for lazy instantiation of an explicit specialization |
3629 | // yet, and MSVC eagerly instantiates in this case. |
3630 | // FIXME: This is wrong in standard C++. |
3631 | if (D->isThisDeclarationADefinition() && |
3632 | SemaRef.InstantiateClass(D->getLocation(), InstD, D, TemplateArgs, |
3633 | TSK_ImplicitInstantiation, |
3634 | /*Complain=*/true)) |
3635 | return nullptr; |
3636 | |
3637 | return InstD; |
3638 | } |
3639 | |
3640 | Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl( |
3641 | VarTemplateSpecializationDecl *D) { |
3642 | |
3643 | TemplateArgumentListInfo VarTemplateArgsInfo; |
3644 | VarTemplateDecl *VarTemplate = D->getSpecializedTemplate(); |
3645 | assert(VarTemplate &&((VarTemplate && "A template specialization without specialized template?" ) ? static_cast<void> (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3646, __PRETTY_FUNCTION__)) |
3646 | "A template specialization without specialized template?")((VarTemplate && "A template specialization without specialized template?" ) ? static_cast<void> (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3646, __PRETTY_FUNCTION__)); |
3647 | |
3648 | VarTemplateDecl *InstVarTemplate = |
3649 | cast_or_null<VarTemplateDecl>(SemaRef.FindInstantiatedDecl( |
3650 | D->getLocation(), VarTemplate, TemplateArgs)); |
3651 | if (!InstVarTemplate) |
3652 | return nullptr; |
3653 | |
3654 | // Substitute the current template arguments. |
3655 | const TemplateArgumentListInfo &TemplateArgsInfo = D->getTemplateArgsInfo(); |
3656 | VarTemplateArgsInfo.setLAngleLoc(TemplateArgsInfo.getLAngleLoc()); |
3657 | VarTemplateArgsInfo.setRAngleLoc(TemplateArgsInfo.getRAngleLoc()); |
3658 | |
3659 | if (SemaRef.Subst(TemplateArgsInfo.getArgumentArray(), |
3660 | TemplateArgsInfo.size(), VarTemplateArgsInfo, TemplateArgs)) |
3661 | return nullptr; |
3662 | |
3663 | // Check that the template argument list is well-formed for this template. |
3664 | SmallVector<TemplateArgument, 4> Converted; |
3665 | if (SemaRef.CheckTemplateArgumentList(InstVarTemplate, D->getLocation(), |
3666 | VarTemplateArgsInfo, false, Converted, |
3667 | /*UpdateArgsWithConversion=*/true)) |
3668 | return nullptr; |
3669 | |
3670 | // Check whether we've already seen a declaration of this specialization. |
3671 | void *InsertPos = nullptr; |
3672 | VarTemplateSpecializationDecl *PrevDecl = |
3673 | InstVarTemplate->findSpecialization(Converted, InsertPos); |
3674 | |
3675 | // Check whether we've already seen a conflicting instantiation of this |
3676 | // declaration (for instance, if there was a prior implicit instantiation). |
3677 | bool Ignored; |
3678 | if (PrevDecl && SemaRef.CheckSpecializationInstantiationRedecl( |
3679 | D->getLocation(), D->getSpecializationKind(), PrevDecl, |
3680 | PrevDecl->getSpecializationKind(), |
3681 | PrevDecl->getPointOfInstantiation(), Ignored)) |
3682 | return nullptr; |
3683 | |
3684 | return VisitVarTemplateSpecializationDecl( |
3685 | InstVarTemplate, D, VarTemplateArgsInfo, Converted, PrevDecl); |
3686 | } |
3687 | |
3688 | Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl( |
3689 | VarTemplateDecl *VarTemplate, VarDecl *D, |
3690 | const TemplateArgumentListInfo &TemplateArgsInfo, |
3691 | ArrayRef<TemplateArgument> Converted, |
3692 | VarTemplateSpecializationDecl *PrevDecl) { |
3693 | |
3694 | // Do substitution on the type of the declaration |
3695 | TypeSourceInfo *DI = |
3696 | SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs, |
3697 | D->getTypeSpecStartLoc(), D->getDeclName()); |
3698 | if (!DI) |
3699 | return nullptr; |
3700 | |
3701 | if (DI->getType()->isFunctionType()) { |
3702 | SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function) |
3703 | << D->isStaticDataMember() << DI->getType(); |
3704 | return nullptr; |
3705 | } |
3706 | |
3707 | // Build the instantiated declaration |
3708 | VarTemplateSpecializationDecl *Var = VarTemplateSpecializationDecl::Create( |
3709 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
3710 | VarTemplate, DI->getType(), DI, D->getStorageClass(), Converted); |
3711 | Var->setTemplateArgsInfo(TemplateArgsInfo); |
3712 | if (!PrevDecl) { |
3713 | void *InsertPos = nullptr; |
3714 | VarTemplate->findSpecialization(Converted, InsertPos); |
3715 | VarTemplate->AddSpecialization(Var, InsertPos); |
3716 | } |
3717 | |
3718 | if (SemaRef.getLangOpts().OpenCL) |
3719 | SemaRef.deduceOpenCLAddressSpace(Var); |
3720 | |
3721 | // Substitute the nested name specifier, if any. |
3722 | if (SubstQualifier(D, Var)) |
3723 | return nullptr; |
3724 | |
3725 | SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner, |
3726 | StartingScope, false, PrevDecl); |
3727 | |
3728 | return Var; |
3729 | } |
3730 | |
3731 | Decl *TemplateDeclInstantiator::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) { |
3732 | llvm_unreachable("@defs is not supported in Objective-C++")::llvm::llvm_unreachable_internal("@defs is not supported in Objective-C++" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3732); |
3733 | } |
3734 | |
3735 | Decl *TemplateDeclInstantiator::VisitFriendTemplateDecl(FriendTemplateDecl *D) { |
3736 | // FIXME: We need to be able to instantiate FriendTemplateDecls. |
3737 | unsigned DiagID = SemaRef.getDiagnostics().getCustomDiagID( |
3738 | DiagnosticsEngine::Error, |
3739 | "cannot instantiate %0 yet"); |
3740 | SemaRef.Diag(D->getLocation(), DiagID) |
3741 | << D->getDeclKindName(); |
3742 | |
3743 | return nullptr; |
3744 | } |
3745 | |
3746 | Decl *TemplateDeclInstantiator::VisitConceptDecl(ConceptDecl *D) { |
3747 | llvm_unreachable("Concept definitions cannot reside inside a template")::llvm::llvm_unreachable_internal("Concept definitions cannot reside inside a template" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3747); |
3748 | } |
3749 | |
3750 | Decl * |
3751 | TemplateDeclInstantiator::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) { |
3752 | return RequiresExprBodyDecl::Create(SemaRef.Context, D->getDeclContext(), |
3753 | D->getBeginLoc()); |
3754 | } |
3755 | |
3756 | Decl *TemplateDeclInstantiator::VisitDecl(Decl *D) { |
3757 | llvm_unreachable("Unexpected decl")::llvm::llvm_unreachable_internal("Unexpected decl", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3757); |
3758 | } |
3759 | |
3760 | Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner, |
3761 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
3762 | TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs); |
3763 | if (D->isInvalidDecl()) |
3764 | return nullptr; |
3765 | |
3766 | Decl *SubstD; |
3767 | runWithSufficientStackSpace(D->getLocation(), [&] { |
3768 | SubstD = Instantiator.Visit(D); |
3769 | }); |
3770 | return SubstD; |
3771 | } |
3772 | |
3773 | void TemplateDeclInstantiator::adjustForRewrite(RewriteKind RK, |
3774 | FunctionDecl *Orig, QualType &T, |
3775 | TypeSourceInfo *&TInfo, |
3776 | DeclarationNameInfo &NameInfo) { |
3777 | assert(RK == RewriteKind::RewriteSpaceshipAsEqualEqual)((RK == RewriteKind::RewriteSpaceshipAsEqualEqual) ? static_cast <void> (0) : __assert_fail ("RK == RewriteKind::RewriteSpaceshipAsEqualEqual" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3777, __PRETTY_FUNCTION__)); |
3778 | |
3779 | // C++2a [class.compare.default]p3: |
3780 | // the return type is replaced with bool |
3781 | auto *FPT = T->castAs<FunctionProtoType>(); |
3782 | T = SemaRef.Context.getFunctionType( |
3783 | SemaRef.Context.BoolTy, FPT->getParamTypes(), FPT->getExtProtoInfo()); |
3784 | |
3785 | // Update the return type in the source info too. The most straightforward |
3786 | // way is to create new TypeSourceInfo for the new type. Use the location of |
3787 | // the '= default' as the location of the new type. |
3788 | // |
3789 | // FIXME: Set the correct return type when we initially transform the type, |
3790 | // rather than delaying it to now. |
3791 | TypeSourceInfo *NewTInfo = |
3792 | SemaRef.Context.getTrivialTypeSourceInfo(T, Orig->getEndLoc()); |
3793 | auto OldLoc = TInfo->getTypeLoc().getAsAdjusted<FunctionProtoTypeLoc>(); |
3794 | assert(OldLoc && "type of function is not a function type?")((OldLoc && "type of function is not a function type?" ) ? static_cast<void> (0) : __assert_fail ("OldLoc && \"type of function is not a function type?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3794, __PRETTY_FUNCTION__)); |
3795 | auto NewLoc = NewTInfo->getTypeLoc().castAs<FunctionProtoTypeLoc>(); |
3796 | for (unsigned I = 0, N = OldLoc.getNumParams(); I != N; ++I) |
3797 | NewLoc.setParam(I, OldLoc.getParam(I)); |
3798 | TInfo = NewTInfo; |
3799 | |
3800 | // and the declarator-id is replaced with operator== |
3801 | NameInfo.setName( |
3802 | SemaRef.Context.DeclarationNames.getCXXOperatorName(OO_EqualEqual)); |
3803 | } |
3804 | |
3805 | FunctionDecl *Sema::SubstSpaceshipAsEqualEqual(CXXRecordDecl *RD, |
3806 | FunctionDecl *Spaceship) { |
3807 | if (Spaceship->isInvalidDecl()) |
3808 | return nullptr; |
3809 | |
3810 | // C++2a [class.compare.default]p3: |
3811 | // an == operator function is declared implicitly [...] with the same |
3812 | // access and function-definition and in the same class scope as the |
3813 | // three-way comparison operator function |
3814 | MultiLevelTemplateArgumentList NoTemplateArgs; |
3815 | NoTemplateArgs.setKind(TemplateSubstitutionKind::Rewrite); |
3816 | NoTemplateArgs.addOuterRetainedLevels(RD->getTemplateDepth()); |
3817 | TemplateDeclInstantiator Instantiator(*this, RD, NoTemplateArgs); |
3818 | Decl *R; |
3819 | if (auto *MD = dyn_cast<CXXMethodDecl>(Spaceship)) { |
3820 | R = Instantiator.VisitCXXMethodDecl( |
3821 | MD, nullptr, None, |
3822 | TemplateDeclInstantiator::RewriteKind::RewriteSpaceshipAsEqualEqual); |
3823 | } else { |
3824 | assert(Spaceship->getFriendObjectKind() &&((Spaceship->getFriendObjectKind() && "defaulted spaceship is neither a member nor a friend" ) ? static_cast<void> (0) : __assert_fail ("Spaceship->getFriendObjectKind() && \"defaulted spaceship is neither a member nor a friend\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3825, __PRETTY_FUNCTION__)) |
3825 | "defaulted spaceship is neither a member nor a friend")((Spaceship->getFriendObjectKind() && "defaulted spaceship is neither a member nor a friend" ) ? static_cast<void> (0) : __assert_fail ("Spaceship->getFriendObjectKind() && \"defaulted spaceship is neither a member nor a friend\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3825, __PRETTY_FUNCTION__)); |
3826 | |
3827 | R = Instantiator.VisitFunctionDecl( |
3828 | Spaceship, nullptr, |
3829 | TemplateDeclInstantiator::RewriteKind::RewriteSpaceshipAsEqualEqual); |
3830 | if (!R) |
3831 | return nullptr; |
3832 | |
3833 | FriendDecl *FD = |
3834 | FriendDecl::Create(Context, RD, Spaceship->getLocation(), |
3835 | cast<NamedDecl>(R), Spaceship->getBeginLoc()); |
3836 | FD->setAccess(AS_public); |
3837 | RD->addDecl(FD); |
3838 | } |
3839 | return cast_or_null<FunctionDecl>(R); |
3840 | } |
3841 | |
3842 | /// Instantiates a nested template parameter list in the current |
3843 | /// instantiation context. |
3844 | /// |
3845 | /// \param L The parameter list to instantiate |
3846 | /// |
3847 | /// \returns NULL if there was an error |
3848 | TemplateParameterList * |
3849 | TemplateDeclInstantiator::SubstTemplateParams(TemplateParameterList *L) { |
3850 | // Get errors for all the parameters before bailing out. |
3851 | bool Invalid = false; |
3852 | |
3853 | unsigned N = L->size(); |
3854 | typedef SmallVector<NamedDecl *, 8> ParamVector; |
3855 | ParamVector Params; |
3856 | Params.reserve(N); |
3857 | for (auto &P : *L) { |
3858 | NamedDecl *D = cast_or_null<NamedDecl>(Visit(P)); |
3859 | Params.push_back(D); |
3860 | Invalid = Invalid || !D || D->isInvalidDecl(); |
3861 | } |
3862 | |
3863 | // Clean up if we had an error. |
3864 | if (Invalid) |
3865 | return nullptr; |
3866 | |
3867 | // FIXME: Concepts: Substitution into requires clause should only happen when |
3868 | // checking satisfaction. |
3869 | Expr *InstRequiresClause = nullptr; |
3870 | if (Expr *E = L->getRequiresClause()) { |
3871 | EnterExpressionEvaluationContext ConstantEvaluated( |
3872 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
3873 | ExprResult Res = SemaRef.SubstExpr(E, TemplateArgs); |
3874 | if (Res.isInvalid() || !Res.isUsable()) { |
3875 | return nullptr; |
3876 | } |
3877 | InstRequiresClause = Res.get(); |
3878 | } |
3879 | |
3880 | TemplateParameterList *InstL |
3881 | = TemplateParameterList::Create(SemaRef.Context, L->getTemplateLoc(), |
3882 | L->getLAngleLoc(), Params, |
3883 | L->getRAngleLoc(), InstRequiresClause); |
3884 | return InstL; |
3885 | } |
3886 | |
3887 | TemplateParameterList * |
3888 | Sema::SubstTemplateParams(TemplateParameterList *Params, DeclContext *Owner, |
3889 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
3890 | TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs); |
3891 | return Instantiator.SubstTemplateParams(Params); |
3892 | } |
3893 | |
3894 | /// Instantiate the declaration of a class template partial |
3895 | /// specialization. |
3896 | /// |
3897 | /// \param ClassTemplate the (instantiated) class template that is partially |
3898 | // specialized by the instantiation of \p PartialSpec. |
3899 | /// |
3900 | /// \param PartialSpec the (uninstantiated) class template partial |
3901 | /// specialization that we are instantiating. |
3902 | /// |
3903 | /// \returns The instantiated partial specialization, if successful; otherwise, |
3904 | /// NULL to indicate an error. |
3905 | ClassTemplatePartialSpecializationDecl * |
3906 | TemplateDeclInstantiator::InstantiateClassTemplatePartialSpecialization( |
3907 | ClassTemplateDecl *ClassTemplate, |
3908 | ClassTemplatePartialSpecializationDecl *PartialSpec) { |
3909 | // Create a local instantiation scope for this class template partial |
3910 | // specialization, which will contain the instantiations of the template |
3911 | // parameters. |
3912 | LocalInstantiationScope Scope(SemaRef); |
3913 | |
3914 | // Substitute into the template parameters of the class template partial |
3915 | // specialization. |
3916 | TemplateParameterList *TempParams = PartialSpec->getTemplateParameters(); |
3917 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
3918 | if (!InstParams) |
3919 | return nullptr; |
3920 | |
3921 | // Substitute into the template arguments of the class template partial |
3922 | // specialization. |
3923 | const ASTTemplateArgumentListInfo *TemplArgInfo |
3924 | = PartialSpec->getTemplateArgsAsWritten(); |
3925 | TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc, |
3926 | TemplArgInfo->RAngleLoc); |
3927 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
3928 | TemplArgInfo->NumTemplateArgs, |
3929 | InstTemplateArgs, TemplateArgs)) |
3930 | return nullptr; |
3931 | |
3932 | // Check that the template argument list is well-formed for this |
3933 | // class template. |
3934 | SmallVector<TemplateArgument, 4> Converted; |
3935 | if (SemaRef.CheckTemplateArgumentList(ClassTemplate, |
3936 | PartialSpec->getLocation(), |
3937 | InstTemplateArgs, |
3938 | false, |
3939 | Converted)) |
3940 | return nullptr; |
3941 | |
3942 | // Check these arguments are valid for a template partial specialization. |
3943 | if (SemaRef.CheckTemplatePartialSpecializationArgs( |
3944 | PartialSpec->getLocation(), ClassTemplate, InstTemplateArgs.size(), |
3945 | Converted)) |
3946 | return nullptr; |
3947 | |
3948 | // Figure out where to insert this class template partial specialization |
3949 | // in the member template's set of class template partial specializations. |
3950 | void *InsertPos = nullptr; |
3951 | ClassTemplateSpecializationDecl *PrevDecl |
3952 | = ClassTemplate->findPartialSpecialization(Converted, InstParams, |
3953 | InsertPos); |
3954 | |
3955 | // Build the canonical type that describes the converted template |
3956 | // arguments of the class template partial specialization. |
3957 | QualType CanonType |
3958 | = SemaRef.Context.getTemplateSpecializationType(TemplateName(ClassTemplate), |
3959 | Converted); |
3960 | |
3961 | // Build the fully-sugared type for this class template |
3962 | // specialization as the user wrote in the specialization |
3963 | // itself. This means that we'll pretty-print the type retrieved |
3964 | // from the specialization's declaration the way that the user |
3965 | // actually wrote the specialization, rather than formatting the |
3966 | // name based on the "canonical" representation used to store the |
3967 | // template arguments in the specialization. |
3968 | TypeSourceInfo *WrittenTy |
3969 | = SemaRef.Context.getTemplateSpecializationTypeInfo( |
3970 | TemplateName(ClassTemplate), |
3971 | PartialSpec->getLocation(), |
3972 | InstTemplateArgs, |
3973 | CanonType); |
3974 | |
3975 | if (PrevDecl) { |
3976 | // We've already seen a partial specialization with the same template |
3977 | // parameters and template arguments. This can happen, for example, when |
3978 | // substituting the outer template arguments ends up causing two |
3979 | // class template partial specializations of a member class template |
3980 | // to have identical forms, e.g., |
3981 | // |
3982 | // template<typename T, typename U> |
3983 | // struct Outer { |
3984 | // template<typename X, typename Y> struct Inner; |
3985 | // template<typename Y> struct Inner<T, Y>; |
3986 | // template<typename Y> struct Inner<U, Y>; |
3987 | // }; |
3988 | // |
3989 | // Outer<int, int> outer; // error: the partial specializations of Inner |
3990 | // // have the same signature. |
3991 | SemaRef.Diag(PartialSpec->getLocation(), diag::err_partial_spec_redeclared) |
3992 | << WrittenTy->getType(); |
3993 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_prev_partial_spec_here) |
3994 | << SemaRef.Context.getTypeDeclType(PrevDecl); |
3995 | return nullptr; |
3996 | } |
3997 | |
3998 | |
3999 | // Create the class template partial specialization declaration. |
4000 | ClassTemplatePartialSpecializationDecl *InstPartialSpec = |
4001 | ClassTemplatePartialSpecializationDecl::Create( |
4002 | SemaRef.Context, PartialSpec->getTagKind(), Owner, |
4003 | PartialSpec->getBeginLoc(), PartialSpec->getLocation(), InstParams, |
4004 | ClassTemplate, Converted, InstTemplateArgs, CanonType, nullptr); |
4005 | // Substitute the nested name specifier, if any. |
4006 | if (SubstQualifier(PartialSpec, InstPartialSpec)) |
4007 | return nullptr; |
4008 | |
4009 | InstPartialSpec->setInstantiatedFromMember(PartialSpec); |
4010 | InstPartialSpec->setTypeAsWritten(WrittenTy); |
4011 | |
4012 | // Check the completed partial specialization. |
4013 | SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec); |
4014 | |
4015 | // Add this partial specialization to the set of class template partial |
4016 | // specializations. |
4017 | ClassTemplate->AddPartialSpecialization(InstPartialSpec, |
4018 | /*InsertPos=*/nullptr); |
4019 | return InstPartialSpec; |
4020 | } |
4021 | |
4022 | /// Instantiate the declaration of a variable template partial |
4023 | /// specialization. |
4024 | /// |
4025 | /// \param VarTemplate the (instantiated) variable template that is partially |
4026 | /// specialized by the instantiation of \p PartialSpec. |
4027 | /// |
4028 | /// \param PartialSpec the (uninstantiated) variable template partial |
4029 | /// specialization that we are instantiating. |
4030 | /// |
4031 | /// \returns The instantiated partial specialization, if successful; otherwise, |
4032 | /// NULL to indicate an error. |
4033 | VarTemplatePartialSpecializationDecl * |
4034 | TemplateDeclInstantiator::InstantiateVarTemplatePartialSpecialization( |
4035 | VarTemplateDecl *VarTemplate, |
4036 | VarTemplatePartialSpecializationDecl *PartialSpec) { |
4037 | // Create a local instantiation scope for this variable template partial |
4038 | // specialization, which will contain the instantiations of the template |
4039 | // parameters. |
4040 | LocalInstantiationScope Scope(SemaRef); |
4041 | |
4042 | // Substitute into the template parameters of the variable template partial |
4043 | // specialization. |
4044 | TemplateParameterList *TempParams = PartialSpec->getTemplateParameters(); |
4045 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
4046 | if (!InstParams) |
4047 | return nullptr; |
4048 | |
4049 | // Substitute into the template arguments of the variable template partial |
4050 | // specialization. |
4051 | const ASTTemplateArgumentListInfo *TemplArgInfo |
4052 | = PartialSpec->getTemplateArgsAsWritten(); |
4053 | TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc, |
4054 | TemplArgInfo->RAngleLoc); |
4055 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
4056 | TemplArgInfo->NumTemplateArgs, |
4057 | InstTemplateArgs, TemplateArgs)) |
4058 | return nullptr; |
4059 | |
4060 | // Check that the template argument list is well-formed for this |
4061 | // class template. |
4062 | SmallVector<TemplateArgument, 4> Converted; |
4063 | if (SemaRef.CheckTemplateArgumentList(VarTemplate, PartialSpec->getLocation(), |
4064 | InstTemplateArgs, false, Converted)) |
4065 | return nullptr; |
4066 | |
4067 | // Check these arguments are valid for a template partial specialization. |
4068 | if (SemaRef.CheckTemplatePartialSpecializationArgs( |
4069 | PartialSpec->getLocation(), VarTemplate, InstTemplateArgs.size(), |
4070 | Converted)) |
4071 | return nullptr; |
4072 | |
4073 | // Figure out where to insert this variable template partial specialization |
4074 | // in the member template's set of variable template partial specializations. |
4075 | void *InsertPos = nullptr; |
4076 | VarTemplateSpecializationDecl *PrevDecl = |
4077 | VarTemplate->findPartialSpecialization(Converted, InstParams, InsertPos); |
4078 | |
4079 | // Build the canonical type that describes the converted template |
4080 | // arguments of the variable template partial specialization. |
4081 | QualType CanonType = SemaRef.Context.getTemplateSpecializationType( |
4082 | TemplateName(VarTemplate), Converted); |
4083 | |
4084 | // Build the fully-sugared type for this variable template |
4085 | // specialization as the user wrote in the specialization |
4086 | // itself. This means that we'll pretty-print the type retrieved |
4087 | // from the specialization's declaration the way that the user |
4088 | // actually wrote the specialization, rather than formatting the |
4089 | // name based on the "canonical" representation used to store the |
4090 | // template arguments in the specialization. |
4091 | TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo( |
4092 | TemplateName(VarTemplate), PartialSpec->getLocation(), InstTemplateArgs, |
4093 | CanonType); |
4094 | |
4095 | if (PrevDecl) { |
4096 | // We've already seen a partial specialization with the same template |
4097 | // parameters and template arguments. This can happen, for example, when |
4098 | // substituting the outer template arguments ends up causing two |
4099 | // variable template partial specializations of a member variable template |
4100 | // to have identical forms, e.g., |
4101 | // |
4102 | // template<typename T, typename U> |
4103 | // struct Outer { |
4104 | // template<typename X, typename Y> pair<X,Y> p; |
4105 | // template<typename Y> pair<T, Y> p; |
4106 | // template<typename Y> pair<U, Y> p; |
4107 | // }; |
4108 | // |
4109 | // Outer<int, int> outer; // error: the partial specializations of Inner |
4110 | // // have the same signature. |
4111 | SemaRef.Diag(PartialSpec->getLocation(), |
4112 | diag::err_var_partial_spec_redeclared) |
4113 | << WrittenTy->getType(); |
4114 | SemaRef.Diag(PrevDecl->getLocation(), |
4115 | diag::note_var_prev_partial_spec_here); |
4116 | return nullptr; |
4117 | } |
4118 | |
4119 | // Do substitution on the type of the declaration |
4120 | TypeSourceInfo *DI = SemaRef.SubstType( |
4121 | PartialSpec->getTypeSourceInfo(), TemplateArgs, |
4122 | PartialSpec->getTypeSpecStartLoc(), PartialSpec->getDeclName()); |
4123 | if (!DI) |
4124 | return nullptr; |
4125 | |
4126 | if (DI->getType()->isFunctionType()) { |
4127 | SemaRef.Diag(PartialSpec->getLocation(), |
4128 | diag::err_variable_instantiates_to_function) |
4129 | << PartialSpec->isStaticDataMember() << DI->getType(); |
4130 | return nullptr; |
4131 | } |
4132 | |
4133 | // Create the variable template partial specialization declaration. |
4134 | VarTemplatePartialSpecializationDecl *InstPartialSpec = |
4135 | VarTemplatePartialSpecializationDecl::Create( |
4136 | SemaRef.Context, Owner, PartialSpec->getInnerLocStart(), |
4137 | PartialSpec->getLocation(), InstParams, VarTemplate, DI->getType(), |
4138 | DI, PartialSpec->getStorageClass(), Converted, InstTemplateArgs); |
4139 | |
4140 | // Substitute the nested name specifier, if any. |
4141 | if (SubstQualifier(PartialSpec, InstPartialSpec)) |
4142 | return nullptr; |
4143 | |
4144 | InstPartialSpec->setInstantiatedFromMember(PartialSpec); |
4145 | InstPartialSpec->setTypeAsWritten(WrittenTy); |
4146 | |
4147 | // Check the completed partial specialization. |
4148 | SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec); |
4149 | |
4150 | // Add this partial specialization to the set of variable template partial |
4151 | // specializations. The instantiation of the initializer is not necessary. |
4152 | VarTemplate->AddPartialSpecialization(InstPartialSpec, /*InsertPos=*/nullptr); |
4153 | |
4154 | SemaRef.BuildVariableInstantiation(InstPartialSpec, PartialSpec, TemplateArgs, |
4155 | LateAttrs, Owner, StartingScope); |
4156 | |
4157 | return InstPartialSpec; |
4158 | } |
4159 | |
4160 | TypeSourceInfo* |
4161 | TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D, |
4162 | SmallVectorImpl<ParmVarDecl *> &Params) { |
4163 | TypeSourceInfo *OldTInfo = D->getTypeSourceInfo(); |
4164 | assert(OldTInfo && "substituting function without type source info")((OldTInfo && "substituting function without type source info" ) ? static_cast<void> (0) : __assert_fail ("OldTInfo && \"substituting function without type source info\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4164, __PRETTY_FUNCTION__)); |
4165 | assert(Params.empty() && "parameter vector is non-empty at start")((Params.empty() && "parameter vector is non-empty at start" ) ? static_cast<void> (0) : __assert_fail ("Params.empty() && \"parameter vector is non-empty at start\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4165, __PRETTY_FUNCTION__)); |
4166 | |
4167 | CXXRecordDecl *ThisContext = nullptr; |
4168 | Qualifiers ThisTypeQuals; |
4169 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { |
4170 | ThisContext = cast<CXXRecordDecl>(Owner); |
4171 | ThisTypeQuals = Method->getMethodQualifiers(); |
4172 | } |
4173 | |
4174 | TypeSourceInfo *NewTInfo |
4175 | = SemaRef.SubstFunctionDeclType(OldTInfo, TemplateArgs, |
4176 | D->getTypeSpecStartLoc(), |
4177 | D->getDeclName(), |
4178 | ThisContext, ThisTypeQuals); |
4179 | if (!NewTInfo) |
4180 | return nullptr; |
4181 | |
4182 | TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens(); |
4183 | if (FunctionProtoTypeLoc OldProtoLoc = OldTL.getAs<FunctionProtoTypeLoc>()) { |
4184 | if (NewTInfo != OldTInfo) { |
4185 | // Get parameters from the new type info. |
4186 | TypeLoc NewTL = NewTInfo->getTypeLoc().IgnoreParens(); |
4187 | FunctionProtoTypeLoc NewProtoLoc = NewTL.castAs<FunctionProtoTypeLoc>(); |
4188 | unsigned NewIdx = 0; |
4189 | for (unsigned OldIdx = 0, NumOldParams = OldProtoLoc.getNumParams(); |
4190 | OldIdx != NumOldParams; ++OldIdx) { |
4191 | ParmVarDecl *OldParam = OldProtoLoc.getParam(OldIdx); |
4192 | if (!OldParam) |
4193 | return nullptr; |
4194 | |
4195 | LocalInstantiationScope *Scope = SemaRef.CurrentInstantiationScope; |
4196 | |
4197 | Optional<unsigned> NumArgumentsInExpansion; |
4198 | if (OldParam->isParameterPack()) |
4199 | NumArgumentsInExpansion = |
4200 | SemaRef.getNumArgumentsInExpansion(OldParam->getType(), |
4201 | TemplateArgs); |
4202 | if (!NumArgumentsInExpansion) { |
4203 | // Simple case: normal parameter, or a parameter pack that's |
4204 | // instantiated to a (still-dependent) parameter pack. |
4205 | ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++); |
4206 | Params.push_back(NewParam); |
4207 | Scope->InstantiatedLocal(OldParam, NewParam); |
4208 | } else { |
4209 | // Parameter pack expansion: make the instantiation an argument pack. |
4210 | Scope->MakeInstantiatedLocalArgPack(OldParam); |
4211 | for (unsigned I = 0; I != *NumArgumentsInExpansion; ++I) { |
4212 | ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++); |
4213 | Params.push_back(NewParam); |
4214 | Scope->InstantiatedLocalPackArg(OldParam, NewParam); |
4215 | } |
4216 | } |
4217 | } |
4218 | } else { |
4219 | // The function type itself was not dependent and therefore no |
4220 | // substitution occurred. However, we still need to instantiate |
4221 | // the function parameters themselves. |
4222 | const FunctionProtoType *OldProto = |
4223 | cast<FunctionProtoType>(OldProtoLoc.getType()); |
4224 | for (unsigned i = 0, i_end = OldProtoLoc.getNumParams(); i != i_end; |
4225 | ++i) { |
4226 | ParmVarDecl *OldParam = OldProtoLoc.getParam(i); |
4227 | if (!OldParam) { |
4228 | Params.push_back(SemaRef.BuildParmVarDeclForTypedef( |
4229 | D, D->getLocation(), OldProto->getParamType(i))); |
4230 | continue; |
4231 | } |
4232 | |
4233 | ParmVarDecl *Parm = |
4234 | cast_or_null<ParmVarDecl>(VisitParmVarDecl(OldParam)); |
4235 | if (!Parm) |
4236 | return nullptr; |
4237 | Params.push_back(Parm); |
4238 | } |
4239 | } |
4240 | } else { |
4241 | // If the type of this function, after ignoring parentheses, is not |
4242 | // *directly* a function type, then we're instantiating a function that |
4243 | // was declared via a typedef or with attributes, e.g., |
4244 | // |
4245 | // typedef int functype(int, int); |
4246 | // functype func; |
4247 | // int __cdecl meth(int, int); |
4248 | // |
4249 | // In this case, we'll just go instantiate the ParmVarDecls that we |
4250 | // synthesized in the method declaration. |
4251 | SmallVector<QualType, 4> ParamTypes; |
4252 | Sema::ExtParameterInfoBuilder ExtParamInfos; |
4253 | if (SemaRef.SubstParmTypes(D->getLocation(), D->parameters(), nullptr, |
4254 | TemplateArgs, ParamTypes, &Params, |
4255 | ExtParamInfos)) |
4256 | return nullptr; |
4257 | } |
4258 | |
4259 | return NewTInfo; |
4260 | } |
4261 | |
4262 | /// Introduce the instantiated function parameters into the local |
4263 | /// instantiation scope, and set the parameter names to those used |
4264 | /// in the template. |
4265 | static bool addInstantiatedParametersToScope(Sema &S, FunctionDecl *Function, |
4266 | const FunctionDecl *PatternDecl, |
4267 | LocalInstantiationScope &Scope, |
4268 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
4269 | unsigned FParamIdx = 0; |
4270 | for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I) { |
4271 | const ParmVarDecl *PatternParam = PatternDecl->getParamDecl(I); |
4272 | if (!PatternParam->isParameterPack()) { |
4273 | // Simple case: not a parameter pack. |
4274 | assert(FParamIdx < Function->getNumParams())((FParamIdx < Function->getNumParams()) ? static_cast< void> (0) : __assert_fail ("FParamIdx < Function->getNumParams()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4274, __PRETTY_FUNCTION__)); |
4275 | ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx); |
4276 | FunctionParam->setDeclName(PatternParam->getDeclName()); |
4277 | // If the parameter's type is not dependent, update it to match the type |
4278 | // in the pattern. They can differ in top-level cv-qualifiers, and we want |
4279 | // the pattern's type here. If the type is dependent, they can't differ, |
4280 | // per core issue 1668. Substitute into the type from the pattern, in case |
4281 | // it's instantiation-dependent. |
4282 | // FIXME: Updating the type to work around this is at best fragile. |
4283 | if (!PatternDecl->getType()->isDependentType()) { |
4284 | QualType T = S.SubstType(PatternParam->getType(), TemplateArgs, |
4285 | FunctionParam->getLocation(), |
4286 | FunctionParam->getDeclName()); |
4287 | if (T.isNull()) |
4288 | return true; |
4289 | FunctionParam->setType(T); |
4290 | } |
4291 | |
4292 | Scope.InstantiatedLocal(PatternParam, FunctionParam); |
4293 | ++FParamIdx; |
4294 | continue; |
4295 | } |
4296 | |
4297 | // Expand the parameter pack. |
4298 | Scope.MakeInstantiatedLocalArgPack(PatternParam); |
4299 | Optional<unsigned> NumArgumentsInExpansion |
4300 | = S.getNumArgumentsInExpansion(PatternParam->getType(), TemplateArgs); |
4301 | if (NumArgumentsInExpansion) { |
4302 | QualType PatternType = |
4303 | PatternParam->getType()->castAs<PackExpansionType>()->getPattern(); |
4304 | for (unsigned Arg = 0; Arg < *NumArgumentsInExpansion; ++Arg) { |
4305 | ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx); |
4306 | FunctionParam->setDeclName(PatternParam->getDeclName()); |
4307 | if (!PatternDecl->getType()->isDependentType()) { |
4308 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, Arg); |
4309 | QualType T = S.SubstType(PatternType, TemplateArgs, |
4310 | FunctionParam->getLocation(), |
4311 | FunctionParam->getDeclName()); |
4312 | if (T.isNull()) |
4313 | return true; |
4314 | FunctionParam->setType(T); |
4315 | } |
4316 | |
4317 | Scope.InstantiatedLocalPackArg(PatternParam, FunctionParam); |
4318 | ++FParamIdx; |
4319 | } |
4320 | } |
4321 | } |
4322 | |
4323 | return false; |
4324 | } |
4325 | |
4326 | bool Sema::InstantiateDefaultArgument(SourceLocation CallLoc, FunctionDecl *FD, |
4327 | ParmVarDecl *Param) { |
4328 | assert(Param->hasUninstantiatedDefaultArg())((Param->hasUninstantiatedDefaultArg()) ? static_cast<void > (0) : __assert_fail ("Param->hasUninstantiatedDefaultArg()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4328, __PRETTY_FUNCTION__)); |
4329 | Expr *UninstExpr = Param->getUninstantiatedDefaultArg(); |
4330 | |
4331 | EnterExpressionEvaluationContext EvalContext( |
4332 | *this, ExpressionEvaluationContext::PotentiallyEvaluated, Param); |
4333 | |
4334 | // Instantiate the expression. |
4335 | // |
4336 | // FIXME: Pass in a correct Pattern argument, otherwise |
4337 | // getTemplateInstantiationArgs uses the lexical context of FD, e.g. |
4338 | // |
4339 | // template<typename T> |
4340 | // struct A { |
4341 | // static int FooImpl(); |
4342 | // |
4343 | // template<typename Tp> |
4344 | // // bug: default argument A<T>::FooImpl() is evaluated with 2-level |
4345 | // // template argument list [[T], [Tp]], should be [[Tp]]. |
4346 | // friend A<Tp> Foo(int a); |
4347 | // }; |
4348 | // |
4349 | // template<typename T> |
4350 | // A<T> Foo(int a = A<T>::FooImpl()); |
4351 | MultiLevelTemplateArgumentList TemplateArgs |
4352 | = getTemplateInstantiationArgs(FD, nullptr, /*RelativeToPrimary=*/true); |
4353 | |
4354 | InstantiatingTemplate Inst(*this, CallLoc, Param, |
4355 | TemplateArgs.getInnermost()); |
4356 | if (Inst.isInvalid()) |
4357 | return true; |
4358 | if (Inst.isAlreadyInstantiating()) { |
4359 | Diag(Param->getBeginLoc(), diag::err_recursive_default_argument) << FD; |
4360 | Param->setInvalidDecl(); |
4361 | return true; |
4362 | } |
4363 | |
4364 | ExprResult Result; |
4365 | { |
4366 | // C++ [dcl.fct.default]p5: |
4367 | // The names in the [default argument] expression are bound, and |
4368 | // the semantic constraints are checked, at the point where the |
4369 | // default argument expression appears. |
4370 | ContextRAII SavedContext(*this, FD); |
4371 | LocalInstantiationScope Local(*this); |
4372 | |
4373 | FunctionDecl *Pattern = FD->getTemplateInstantiationPattern( |
4374 | /*ForDefinition*/ false); |
4375 | if (addInstantiatedParametersToScope(*this, FD, Pattern, Local, |
4376 | TemplateArgs)) |
4377 | return true; |
4378 | |
4379 | runWithSufficientStackSpace(CallLoc, [&] { |
4380 | Result = SubstInitializer(UninstExpr, TemplateArgs, |
4381 | /*DirectInit*/false); |
4382 | }); |
4383 | } |
4384 | if (Result.isInvalid()) |
4385 | return true; |
4386 | |
4387 | // Check the expression as an initializer for the parameter. |
4388 | InitializedEntity Entity |
4389 | = InitializedEntity::InitializeParameter(Context, Param); |
4390 | InitializationKind Kind = InitializationKind::CreateCopy( |
4391 | Param->getLocation(), |
4392 | /*FIXME:EqualLoc*/ UninstExpr->getBeginLoc()); |
4393 | Expr *ResultE = Result.getAs<Expr>(); |
4394 | |
4395 | InitializationSequence InitSeq(*this, Entity, Kind, ResultE); |
4396 | Result = InitSeq.Perform(*this, Entity, Kind, ResultE); |
4397 | if (Result.isInvalid()) |
4398 | return true; |
4399 | |
4400 | Result = |
4401 | ActOnFinishFullExpr(Result.getAs<Expr>(), Param->getOuterLocStart(), |
4402 | /*DiscardedValue*/ false); |
4403 | if (Result.isInvalid()) |
4404 | return true; |
4405 | |
4406 | // Remember the instantiated default argument. |
4407 | Param->setDefaultArg(Result.getAs<Expr>()); |
4408 | if (ASTMutationListener *L = getASTMutationListener()) |
4409 | L->DefaultArgumentInstantiated(Param); |
4410 | |
4411 | return false; |
4412 | } |
4413 | |
4414 | void Sema::InstantiateExceptionSpec(SourceLocation PointOfInstantiation, |
4415 | FunctionDecl *Decl) { |
4416 | const FunctionProtoType *Proto = Decl->getType()->castAs<FunctionProtoType>(); |
4417 | if (Proto->getExceptionSpecType() != EST_Uninstantiated) |
4418 | return; |
4419 | |
4420 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Decl, |
4421 | InstantiatingTemplate::ExceptionSpecification()); |
4422 | if (Inst.isInvalid()) { |
4423 | // We hit the instantiation depth limit. Clear the exception specification |
4424 | // so that our callers don't have to cope with EST_Uninstantiated. |
4425 | UpdateExceptionSpec(Decl, EST_None); |
4426 | return; |
4427 | } |
4428 | if (Inst.isAlreadyInstantiating()) { |
4429 | // This exception specification indirectly depends on itself. Reject. |
4430 | // FIXME: Corresponding rule in the standard? |
4431 | Diag(PointOfInstantiation, diag::err_exception_spec_cycle) << Decl; |
4432 | UpdateExceptionSpec(Decl, EST_None); |
4433 | return; |
4434 | } |
4435 | |
4436 | // Enter the scope of this instantiation. We don't use |
4437 | // PushDeclContext because we don't have a scope. |
4438 | Sema::ContextRAII savedContext(*this, Decl); |
4439 | LocalInstantiationScope Scope(*this); |
4440 | |
4441 | MultiLevelTemplateArgumentList TemplateArgs = |
4442 | getTemplateInstantiationArgs(Decl, nullptr, /*RelativeToPrimary*/true); |
4443 | |
4444 | // FIXME: We can't use getTemplateInstantiationPattern(false) in general |
4445 | // here, because for a non-defining friend declaration in a class template, |
4446 | // we don't store enough information to map back to the friend declaration in |
4447 | // the template. |
4448 | FunctionDecl *Template = Proto->getExceptionSpecTemplate(); |
4449 | if (addInstantiatedParametersToScope(*this, Decl, Template, Scope, |
4450 | TemplateArgs)) { |
4451 | UpdateExceptionSpec(Decl, EST_None); |
4452 | return; |
4453 | } |
4454 | |
4455 | SubstExceptionSpec(Decl, Template->getType()->castAs<FunctionProtoType>(), |
4456 | TemplateArgs); |
4457 | } |
4458 | |
4459 | bool Sema::CheckInstantiatedFunctionTemplateConstraints( |
4460 | SourceLocation PointOfInstantiation, FunctionDecl *Decl, |
4461 | ArrayRef<TemplateArgument> TemplateArgs, |
4462 | ConstraintSatisfaction &Satisfaction) { |
4463 | // In most cases we're not going to have constraints, so check for that first. |
4464 | FunctionTemplateDecl *Template = Decl->getPrimaryTemplate(); |
4465 | // Note - code synthesis context for the constraints check is created |
4466 | // inside CheckConstraintsSatisfaction. |
4467 | SmallVector<const Expr *, 3> TemplateAC; |
4468 | Template->getAssociatedConstraints(TemplateAC); |
4469 | if (TemplateAC.empty()) { |
4470 | Satisfaction.IsSatisfied = true; |
4471 | return false; |
4472 | } |
4473 | |
4474 | // Enter the scope of this instantiation. We don't use |
4475 | // PushDeclContext because we don't have a scope. |
4476 | Sema::ContextRAII savedContext(*this, Decl); |
4477 | LocalInstantiationScope Scope(*this); |
4478 | |
4479 | // If this is not an explicit specialization - we need to get the instantiated |
4480 | // version of the template arguments and add them to scope for the |
4481 | // substitution. |
4482 | if (Decl->isTemplateInstantiation()) { |
4483 | InstantiatingTemplate Inst(*this, Decl->getPointOfInstantiation(), |
4484 | InstantiatingTemplate::ConstraintsCheck{}, Decl->getPrimaryTemplate(), |
4485 | TemplateArgs, SourceRange()); |
4486 | if (Inst.isInvalid()) |
4487 | return true; |
4488 | MultiLevelTemplateArgumentList MLTAL( |
4489 | *Decl->getTemplateSpecializationArgs()); |
4490 | if (addInstantiatedParametersToScope( |
4491 | *this, Decl, Decl->getPrimaryTemplate()->getTemplatedDecl(), |
4492 | Scope, MLTAL)) |
4493 | return true; |
4494 | } |
4495 | Qualifiers ThisQuals; |
4496 | CXXRecordDecl *Record = nullptr; |
4497 | if (auto *Method = dyn_cast<CXXMethodDecl>(Decl)) { |
4498 | ThisQuals = Method->getMethodQualifiers(); |
4499 | Record = Method->getParent(); |
4500 | } |
4501 | CXXThisScopeRAII ThisScope(*this, Record, ThisQuals, Record != nullptr); |
4502 | return CheckConstraintSatisfaction(Template, TemplateAC, TemplateArgs, |
4503 | PointOfInstantiation, Satisfaction); |
4504 | } |
4505 | |
4506 | /// Initializes the common fields of an instantiation function |
4507 | /// declaration (New) from the corresponding fields of its template (Tmpl). |
4508 | /// |
4509 | /// \returns true if there was an error |
4510 | bool |
4511 | TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New, |
4512 | FunctionDecl *Tmpl) { |
4513 | New->setImplicit(Tmpl->isImplicit()); |
4514 | |
4515 | // Forward the mangling number from the template to the instantiated decl. |
4516 | SemaRef.Context.setManglingNumber(New, |
4517 | SemaRef.Context.getManglingNumber(Tmpl)); |
4518 | |
4519 | // If we are performing substituting explicitly-specified template arguments |
4520 | // or deduced template arguments into a function template and we reach this |
4521 | // point, we are now past the point where SFINAE applies and have committed |
4522 | // to keeping the new function template specialization. We therefore |
4523 | // convert the active template instantiation for the function template |
4524 | // into a template instantiation for this specific function template |
4525 | // specialization, which is not a SFINAE context, so that we diagnose any |
4526 | // further errors in the declaration itself. |
4527 | // |
4528 | // FIXME: This is a hack. |
4529 | typedef Sema::CodeSynthesisContext ActiveInstType; |
4530 | ActiveInstType &ActiveInst = SemaRef.CodeSynthesisContexts.back(); |
4531 | if (ActiveInst.Kind == ActiveInstType::ExplicitTemplateArgumentSubstitution || |
4532 | ActiveInst.Kind == ActiveInstType::DeducedTemplateArgumentSubstitution) { |
4533 | if (FunctionTemplateDecl *FunTmpl |
4534 | = dyn_cast<FunctionTemplateDecl>(ActiveInst.Entity)) { |
4535 | assert(FunTmpl->getTemplatedDecl() == Tmpl &&((FunTmpl->getTemplatedDecl() == Tmpl && "Deduction from the wrong function template?" ) ? static_cast<void> (0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4536, __PRETTY_FUNCTION__)) |
4536 | "Deduction from the wrong function template?")((FunTmpl->getTemplatedDecl() == Tmpl && "Deduction from the wrong function template?" ) ? static_cast<void> (0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4536, __PRETTY_FUNCTION__)); |
4537 | (void) FunTmpl; |
4538 | SemaRef.InstantiatingSpecializations.erase( |
4539 | {ActiveInst.Entity->getCanonicalDecl(), ActiveInst.Kind}); |
4540 | atTemplateEnd(SemaRef.TemplateInstCallbacks, SemaRef, ActiveInst); |
4541 | ActiveInst.Kind = ActiveInstType::TemplateInstantiation; |
4542 | ActiveInst.Entity = New; |
4543 | atTemplateBegin(SemaRef.TemplateInstCallbacks, SemaRef, ActiveInst); |
4544 | } |
4545 | } |
4546 | |
4547 | const FunctionProtoType *Proto = Tmpl->getType()->getAs<FunctionProtoType>(); |
4548 | assert(Proto && "Function template without prototype?")((Proto && "Function template without prototype?") ? static_cast <void> (0) : __assert_fail ("Proto && \"Function template without prototype?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4548, __PRETTY_FUNCTION__)); |
4549 | |
4550 | if (Proto->hasExceptionSpec() || Proto->getNoReturnAttr()) { |
4551 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); |
4552 | |
4553 | // DR1330: In C++11, defer instantiation of a non-trivial |
4554 | // exception specification. |
4555 | // DR1484: Local classes and their members are instantiated along with the |
4556 | // containing function. |
4557 | if (SemaRef.getLangOpts().CPlusPlus11 && |
4558 | EPI.ExceptionSpec.Type != EST_None && |
4559 | EPI.ExceptionSpec.Type != EST_DynamicNone && |
4560 | EPI.ExceptionSpec.Type != EST_BasicNoexcept && |
4561 | !Tmpl->isInLocalScopeForInstantiation()) { |
4562 | FunctionDecl *ExceptionSpecTemplate = Tmpl; |
4563 | if (EPI.ExceptionSpec.Type == EST_Uninstantiated) |
4564 | ExceptionSpecTemplate = EPI.ExceptionSpec.SourceTemplate; |
4565 | ExceptionSpecificationType NewEST = EST_Uninstantiated; |
4566 | if (EPI.ExceptionSpec.Type == EST_Unevaluated) |
4567 | NewEST = EST_Unevaluated; |
4568 | |
4569 | // Mark the function has having an uninstantiated exception specification. |
4570 | const FunctionProtoType *NewProto |
4571 | = New->getType()->getAs<FunctionProtoType>(); |
4572 | assert(NewProto && "Template instantiation without function prototype?")((NewProto && "Template instantiation without function prototype?" ) ? static_cast<void> (0) : __assert_fail ("NewProto && \"Template instantiation without function prototype?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4572, __PRETTY_FUNCTION__)); |
4573 | EPI = NewProto->getExtProtoInfo(); |
4574 | EPI.ExceptionSpec.Type = NewEST; |
4575 | EPI.ExceptionSpec.SourceDecl = New; |
4576 | EPI.ExceptionSpec.SourceTemplate = ExceptionSpecTemplate; |
4577 | New->setType(SemaRef.Context.getFunctionType( |
4578 | NewProto->getReturnType(), NewProto->getParamTypes(), EPI)); |
4579 | } else { |
4580 | Sema::ContextRAII SwitchContext(SemaRef, New); |
4581 | SemaRef.SubstExceptionSpec(New, Proto, TemplateArgs); |
4582 | } |
4583 | } |
4584 | |
4585 | // Get the definition. Leaves the variable unchanged if undefined. |
4586 | const FunctionDecl *Definition = Tmpl; |
4587 | Tmpl->isDefined(Definition); |
4588 | |
4589 | SemaRef.InstantiateAttrs(TemplateArgs, Definition, New, |
4590 | LateAttrs, StartingScope); |
4591 | |
4592 | return false; |
4593 | } |
4594 | |
4595 | /// Initializes common fields of an instantiated method |
4596 | /// declaration (New) from the corresponding fields of its template |
4597 | /// (Tmpl). |
4598 | /// |
4599 | /// \returns true if there was an error |
4600 | bool |
4601 | TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New, |
4602 | CXXMethodDecl *Tmpl) { |
4603 | if (InitFunctionInstantiation(New, Tmpl)) |
4604 | return true; |
4605 | |
4606 | if (isa<CXXDestructorDecl>(New) && SemaRef.getLangOpts().CPlusPlus11) |
4607 | SemaRef.AdjustDestructorExceptionSpec(cast<CXXDestructorDecl>(New)); |
4608 | |
4609 | New->setAccess(Tmpl->getAccess()); |
4610 | if (Tmpl->isVirtualAsWritten()) |
4611 | New->setVirtualAsWritten(true); |
4612 | |
4613 | // FIXME: New needs a pointer to Tmpl |
4614 | return false; |
4615 | } |
4616 | |
4617 | bool TemplateDeclInstantiator::SubstDefaultedFunction(FunctionDecl *New, |
4618 | FunctionDecl *Tmpl) { |
4619 | // Transfer across any unqualified lookups. |
4620 | if (auto *DFI = Tmpl->getDefaultedFunctionInfo()) { |
4621 | SmallVector<DeclAccessPair, 32> Lookups; |
4622 | Lookups.reserve(DFI->getUnqualifiedLookups().size()); |
4623 | bool AnyChanged = false; |
4624 | for (DeclAccessPair DA : DFI->getUnqualifiedLookups()) { |
4625 | NamedDecl *D = SemaRef.FindInstantiatedDecl(New->getLocation(), |
4626 | DA.getDecl(), TemplateArgs); |
4627 | if (!D) |
4628 | return true; |
4629 | AnyChanged |= (D != DA.getDecl()); |
4630 | Lookups.push_back(DeclAccessPair::make(D, DA.getAccess())); |
4631 | } |
4632 | |
4633 | // It's unlikely that substitution will change any declarations. Don't |
4634 | // store an unnecessary copy in that case. |
4635 | New->setDefaultedFunctionInfo( |
4636 | AnyChanged ? FunctionDecl::DefaultedFunctionInfo::Create( |
4637 | SemaRef.Context, Lookups) |
4638 | : DFI); |
4639 | } |
4640 | |
4641 | SemaRef.SetDeclDefaulted(New, Tmpl->getLocation()); |
4642 | return false; |
4643 | } |
4644 | |
4645 | /// Instantiate (or find existing instantiation of) a function template with a |
4646 | /// given set of template arguments. |
4647 | /// |
4648 | /// Usually this should not be used, and template argument deduction should be |
4649 | /// used in its place. |
4650 | FunctionDecl * |
4651 | Sema::InstantiateFunctionDeclaration(FunctionTemplateDecl *FTD, |
4652 | const TemplateArgumentList *Args, |
4653 | SourceLocation Loc) { |
4654 | FunctionDecl *FD = FTD->getTemplatedDecl(); |
4655 | |
4656 | sema::TemplateDeductionInfo Info(Loc); |
4657 | InstantiatingTemplate Inst( |
4658 | *this, Loc, FTD, Args->asArray(), |
4659 | CodeSynthesisContext::ExplicitTemplateArgumentSubstitution, Info); |
4660 | if (Inst.isInvalid()) |
4661 | return nullptr; |
4662 | |
4663 | ContextRAII SavedContext(*this, FD); |
4664 | MultiLevelTemplateArgumentList MArgs(*Args); |
4665 | |
4666 | return cast_or_null<FunctionDecl>(SubstDecl(FD, FD->getParent(), MArgs)); |
4667 | } |
4668 | |
4669 | /// Instantiate the definition of the given function from its |
4670 | /// template. |
4671 | /// |
4672 | /// \param PointOfInstantiation the point at which the instantiation was |
4673 | /// required. Note that this is not precisely a "point of instantiation" |
4674 | /// for the function, but it's close. |
4675 | /// |
4676 | /// \param Function the already-instantiated declaration of a |
4677 | /// function template specialization or member function of a class template |
4678 | /// specialization. |
4679 | /// |
4680 | /// \param Recursive if true, recursively instantiates any functions that |
4681 | /// are required by this instantiation. |
4682 | /// |
4683 | /// \param DefinitionRequired if true, then we are performing an explicit |
4684 | /// instantiation where the body of the function is required. Complain if |
4685 | /// there is no such body. |
4686 | void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, |
4687 | FunctionDecl *Function, |
4688 | bool Recursive, |
4689 | bool DefinitionRequired, |
4690 | bool AtEndOfTU) { |
4691 | if (Function->isInvalidDecl() || isa<CXXDeductionGuideDecl>(Function)) |
4692 | return; |
4693 | |
4694 | // Never instantiate an explicit specialization except if it is a class scope |
4695 | // explicit specialization. |
4696 | TemplateSpecializationKind TSK = |
4697 | Function->getTemplateSpecializationKindForInstantiation(); |
4698 | if (TSK == TSK_ExplicitSpecialization) |
4699 | return; |
4700 | |
4701 | // Don't instantiate a definition if we already have one. |
4702 | const FunctionDecl *ExistingDefn = nullptr; |
4703 | if (Function->isDefined(ExistingDefn, |
4704 | /*CheckForPendingFriendDefinition=*/true)) { |
4705 | if (ExistingDefn->isThisDeclarationADefinition()) |
4706 | return; |
4707 | |
4708 | // If we're asked to instantiate a function whose body comes from an |
4709 | // instantiated friend declaration, attach the instantiated body to the |
4710 | // corresponding declaration of the function. |
4711 | assert(ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition())((ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition ()) ? static_cast<void> (0) : __assert_fail ("ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition()" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4711, __PRETTY_FUNCTION__)); |
4712 | Function = const_cast<FunctionDecl*>(ExistingDefn); |
4713 | } |
4714 | |
4715 | // Find the function body that we'll be substituting. |
4716 | const FunctionDecl *PatternDecl = Function->getTemplateInstantiationPattern(); |
4717 | assert(PatternDecl && "instantiating a non-template")((PatternDecl && "instantiating a non-template") ? static_cast <void> (0) : __assert_fail ("PatternDecl && \"instantiating a non-template\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4717, __PRETTY_FUNCTION__)); |
4718 | |
4719 | const FunctionDecl *PatternDef = PatternDecl->getDefinition(); |
4720 | Stmt *Pattern = nullptr; |
4721 | if (PatternDef) { |
4722 | Pattern = PatternDef->getBody(PatternDef); |
4723 | PatternDecl = PatternDef; |
4724 | if (PatternDef->willHaveBody()) |
4725 | PatternDef = nullptr; |
4726 | } |
4727 | |
4728 | // FIXME: We need to track the instantiation stack in order to know which |
4729 | // definitions should be visible within this instantiation. |
4730 | if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Function, |
4731 | Function->getInstantiatedFromMemberFunction(), |
4732 | PatternDecl, PatternDef, TSK, |
4733 | /*Complain*/DefinitionRequired)) { |
4734 | if (DefinitionRequired) |
4735 | Function->setInvalidDecl(); |
4736 | else if (TSK == TSK_ExplicitInstantiationDefinition) { |
4737 | // Try again at the end of the translation unit (at which point a |
4738 | // definition will be required). |
4739 | assert(!Recursive)((!Recursive) ? static_cast<void> (0) : __assert_fail ( "!Recursive", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4739, __PRETTY_FUNCTION__)); |
4740 | Function->setInstantiationIsPending(true); |
4741 | PendingInstantiations.push_back( |
4742 | std::make_pair(Function, PointOfInstantiation)); |
4743 | } else if (TSK == TSK_ImplicitInstantiation) { |
4744 | if (AtEndOfTU && !getDiagnostics().hasErrorOccurred() && |
4745 | !getSourceManager().isInSystemHeader(PatternDecl->getBeginLoc())) { |
4746 | Diag(PointOfInstantiation, diag::warn_func_template_missing) |
4747 | << Function; |
4748 | Diag(PatternDecl->getLocation(), diag::note_forward_template_decl); |
4749 | if (getLangOpts().CPlusPlus11) |
4750 | Diag(PointOfInstantiation, diag::note_inst_declaration_hint) |
4751 | << Function; |
4752 | } |
4753 | } |
4754 | |
4755 | return; |
4756 | } |
4757 | |
4758 | // Postpone late parsed template instantiations. |
4759 | if (PatternDecl->isLateTemplateParsed() && |
4760 | !LateTemplateParser) { |
4761 | Function->setInstantiationIsPending(true); |
4762 | LateParsedInstantiations.push_back( |
4763 | std::make_pair(Function, PointOfInstantiation)); |
4764 | return; |
4765 | } |
4766 | |
4767 | llvm::TimeTraceScope TimeScope("InstantiateFunction", [&]() { |
4768 | std::string Name; |
4769 | llvm::raw_string_ostream OS(Name); |
4770 | Function->getNameForDiagnostic(OS, getPrintingPolicy(), |
4771 | /*Qualified=*/true); |
4772 | return Name; |
4773 | }); |
4774 | |
4775 | // If we're performing recursive template instantiation, create our own |
4776 | // queue of pending implicit instantiations that we will instantiate later, |
4777 | // while we're still within our own instantiation context. |
4778 | // This has to happen before LateTemplateParser below is called, so that |
4779 | // it marks vtables used in late parsed templates as used. |
4780 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
4781 | /*Enabled=*/Recursive); |
4782 | LocalEagerInstantiationScope LocalInstantiations(*this); |
4783 | |
4784 | // Call the LateTemplateParser callback if there is a need to late parse |
4785 | // a templated function definition. |
4786 | if (!Pattern && PatternDecl->isLateTemplateParsed() && |
4787 | LateTemplateParser) { |
4788 | // FIXME: Optimize to allow individual templates to be deserialized. |
4789 | if (PatternDecl->isFromASTFile()) |
4790 | ExternalSource->ReadLateParsedTemplates(LateParsedTemplateMap); |
4791 | |
4792 | auto LPTIter = LateParsedTemplateMap.find(PatternDecl); |
4793 | assert(LPTIter != LateParsedTemplateMap.end() &&((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate" ) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4794, __PRETTY_FUNCTION__)) |
4794 | "missing LateParsedTemplate")((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate" ) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4794, __PRETTY_FUNCTION__)); |
4795 | LateTemplateParser(OpaqueParser, *LPTIter->second); |
4796 | Pattern = PatternDecl->getBody(PatternDecl); |
4797 | } |
4798 | |
4799 | // Note, we should never try to instantiate a deleted function template. |
4800 | assert((Pattern || PatternDecl->isDefaulted() ||(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4802, __PRETTY_FUNCTION__)) |
4801 | PatternDecl->hasSkippedBody()) &&(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4802, __PRETTY_FUNCTION__)) |
4802 | "unexpected kind of function template definition")(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4802, __PRETTY_FUNCTION__)); |
4803 | |
4804 | // C++1y [temp.explicit]p10: |
4805 | // Except for inline functions, declarations with types deduced from their |
4806 | // initializer or return value, and class template specializations, other |
4807 | // explicit instantiation declarations have the effect of suppressing the |
4808 | // implicit instantiation of the entity to which they refer. |
4809 | if (TSK == TSK_ExplicitInstantiationDeclaration && |
4810 | !PatternDecl->isInlined() && |
4811 | !PatternDecl->getReturnType()->getContainedAutoType()) |
4812 | return; |
4813 | |
4814 | if (PatternDecl->isInlined()) { |
4815 | // Function, and all later redeclarations of it (from imported modules, |
4816 | // for instance), are now implicitly inline. |
4817 | for (auto *D = Function->getMostRecentDecl(); /**/; |
4818 | D = D->getPreviousDecl()) { |
4819 | D->setImplicitlyInline(); |
4820 | if (D == Function) |
4821 | break; |
4822 | } |
4823 | } |
4824 | |
4825 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Function); |
4826 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
4827 | return; |
4828 | PrettyDeclStackTraceEntry CrashInfo(Context, Function, SourceLocation(), |
4829 | "instantiating function definition"); |
4830 | |
4831 | // The instantiation is visible here, even if it was first declared in an |
4832 | // unimported module. |
4833 | Function->setVisibleDespiteOwningModule(); |
4834 | |
4835 | // Copy the inner loc start from the pattern. |
4836 | Function->setInnerLocStart(PatternDecl->getInnerLocStart()); |
4837 | |
4838 | EnterExpressionEvaluationContext EvalContext( |
4839 | *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
4840 | |
4841 | // Introduce a new scope where local variable instantiations will be |
4842 | // recorded, unless we're actually a member function within a local |
4843 | // class, in which case we need to merge our results with the parent |
4844 | // scope (of the enclosing function). |
4845 | bool MergeWithParentScope = false; |
4846 | if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Function->getDeclContext())) |
4847 | MergeWithParentScope = Rec->isLocalClass(); |
4848 | |
4849 | LocalInstantiationScope Scope(*this, MergeWithParentScope); |
4850 | |
4851 | if (PatternDecl->isDefaulted()) |
4852 | SetDeclDefaulted(Function, PatternDecl->getLocation()); |
4853 | else { |
4854 | MultiLevelTemplateArgumentList TemplateArgs = |
4855 | getTemplateInstantiationArgs(Function, nullptr, false, PatternDecl); |
4856 | |
4857 | // Substitute into the qualifier; we can get a substitution failure here |
4858 | // through evil use of alias templates. |
4859 | // FIXME: Is CurContext correct for this? Should we go to the (instantiation |
4860 | // of the) lexical context of the pattern? |
4861 | SubstQualifier(*this, PatternDecl, Function, TemplateArgs); |
4862 | |
4863 | ActOnStartOfFunctionDef(nullptr, Function); |
4864 | |
4865 | // Enter the scope of this instantiation. We don't use |
4866 | // PushDeclContext because we don't have a scope. |
4867 | Sema::ContextRAII savedContext(*this, Function); |
4868 | |
4869 | if (addInstantiatedParametersToScope(*this, Function, PatternDecl, Scope, |
4870 | TemplateArgs)) |
4871 | return; |
4872 | |
4873 | StmtResult Body; |
4874 | if (PatternDecl->hasSkippedBody()) { |
4875 | ActOnSkippedFunctionBody(Function); |
4876 | Body = nullptr; |
4877 | } else { |
4878 | if (CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(Function)) { |
4879 | // If this is a constructor, instantiate the member initializers. |
4880 | InstantiateMemInitializers(Ctor, cast<CXXConstructorDecl>(PatternDecl), |
4881 | TemplateArgs); |
4882 | |
4883 | // If this is an MS ABI dllexport default constructor, instantiate any |
4884 | // default arguments. |
4885 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && |
4886 | Ctor->isDefaultConstructor()) { |
4887 | InstantiateDefaultCtorDefaultArgs(Ctor); |
4888 | } |
4889 | } |
4890 | |
4891 | // Instantiate the function body. |
4892 | Body = SubstStmt(Pattern, TemplateArgs); |
4893 | |
4894 | if (Body.isInvalid()) |
4895 | Function->setInvalidDecl(); |
4896 | } |
4897 | // FIXME: finishing the function body while in an expression evaluation |
4898 | // context seems wrong. Investigate more. |
4899 | ActOnFinishFunctionBody(Function, Body.get(), /*IsInstantiation=*/true); |
4900 | |
4901 | PerformDependentDiagnostics(PatternDecl, TemplateArgs); |
4902 | |
4903 | if (auto *Listener = getASTMutationListener()) |
4904 | Listener->FunctionDefinitionInstantiated(Function); |
4905 | |
4906 | savedContext.pop(); |
4907 | } |
4908 | |
4909 | DeclGroupRef DG(Function); |
4910 | Consumer.HandleTopLevelDecl(DG); |
4911 | |
4912 | // This class may have local implicit instantiations that need to be |
4913 | // instantiation within this scope. |
4914 | LocalInstantiations.perform(); |
4915 | Scope.Exit(); |
4916 | GlobalInstantiations.perform(); |
4917 | } |
4918 | |
4919 | VarTemplateSpecializationDecl *Sema::BuildVarTemplateInstantiation( |
4920 | VarTemplateDecl *VarTemplate, VarDecl *FromVar, |
4921 | const TemplateArgumentList &TemplateArgList, |
4922 | const TemplateArgumentListInfo &TemplateArgsInfo, |
4923 | SmallVectorImpl<TemplateArgument> &Converted, |
4924 | SourceLocation PointOfInstantiation, |
4925 | LateInstantiatedAttrVec *LateAttrs, |
4926 | LocalInstantiationScope *StartingScope) { |
4927 | if (FromVar->isInvalidDecl()) |
4928 | return nullptr; |
4929 | |
4930 | InstantiatingTemplate Inst(*this, PointOfInstantiation, FromVar); |
4931 | if (Inst.isInvalid()) |
4932 | return nullptr; |
4933 | |
4934 | MultiLevelTemplateArgumentList TemplateArgLists; |
4935 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgList); |
4936 | |
4937 | // Instantiate the first declaration of the variable template: for a partial |
4938 | // specialization of a static data member template, the first declaration may |
4939 | // or may not be the declaration in the class; if it's in the class, we want |
4940 | // to instantiate a member in the class (a declaration), and if it's outside, |
4941 | // we want to instantiate a definition. |
4942 | // |
4943 | // If we're instantiating an explicitly-specialized member template or member |
4944 | // partial specialization, don't do this. The member specialization completely |
4945 | // replaces the original declaration in this case. |
4946 | bool IsMemberSpec = false; |
4947 | if (VarTemplatePartialSpecializationDecl *PartialSpec = |
4948 | dyn_cast<VarTemplatePartialSpecializationDecl>(FromVar)) |
4949 | IsMemberSpec = PartialSpec->isMemberSpecialization(); |
4950 | else if (VarTemplateDecl *FromTemplate = FromVar->getDescribedVarTemplate()) |
4951 | IsMemberSpec = FromTemplate->isMemberSpecialization(); |
4952 | if (!IsMemberSpec) |
4953 | FromVar = FromVar->getFirstDecl(); |
4954 | |
4955 | MultiLevelTemplateArgumentList MultiLevelList(TemplateArgList); |
4956 | TemplateDeclInstantiator Instantiator(*this, FromVar->getDeclContext(), |
4957 | MultiLevelList); |
4958 | |
4959 | // TODO: Set LateAttrs and StartingScope ... |
4960 | |
4961 | return cast_or_null<VarTemplateSpecializationDecl>( |
4962 | Instantiator.VisitVarTemplateSpecializationDecl( |
4963 | VarTemplate, FromVar, TemplateArgsInfo, Converted)); |
4964 | } |
4965 | |
4966 | /// Instantiates a variable template specialization by completing it |
4967 | /// with appropriate type information and initializer. |
4968 | VarTemplateSpecializationDecl *Sema::CompleteVarTemplateSpecializationDecl( |
4969 | VarTemplateSpecializationDecl *VarSpec, VarDecl *PatternDecl, |
4970 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
4971 | assert(PatternDecl->isThisDeclarationADefinition() &&((PatternDecl->isThisDeclarationADefinition() && "don't have a definition to instantiate from" ) ? static_cast<void> (0) : __assert_fail ("PatternDecl->isThisDeclarationADefinition() && \"don't have a definition to instantiate from\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4972, __PRETTY_FUNCTION__)) |
4972 | "don't have a definition to instantiate from")((PatternDecl->isThisDeclarationADefinition() && "don't have a definition to instantiate from" ) ? static_cast<void> (0) : __assert_fail ("PatternDecl->isThisDeclarationADefinition() && \"don't have a definition to instantiate from\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4972, __PRETTY_FUNCTION__)); |
4973 | |
4974 | // Do substitution on the type of the declaration |
4975 | TypeSourceInfo *DI = |
4976 | SubstType(PatternDecl->getTypeSourceInfo(), TemplateArgs, |
4977 | PatternDecl->getTypeSpecStartLoc(), PatternDecl->getDeclName()); |
4978 | if (!DI) |
4979 | return nullptr; |
4980 | |
4981 | // Update the type of this variable template specialization. |
4982 | VarSpec->setType(DI->getType()); |
4983 | |
4984 | // Convert the declaration into a definition now. |
4985 | VarSpec->setCompleteDefinition(); |
4986 | |
4987 | // Instantiate the initializer. |
4988 | InstantiateVariableInitializer(VarSpec, PatternDecl, TemplateArgs); |
4989 | |
4990 | if (getLangOpts().OpenCL) |
4991 | deduceOpenCLAddressSpace(VarSpec); |
4992 | |
4993 | return VarSpec; |
4994 | } |
4995 | |
4996 | /// BuildVariableInstantiation - Used after a new variable has been created. |
4997 | /// Sets basic variable data and decides whether to postpone the |
4998 | /// variable instantiation. |
4999 | void Sema::BuildVariableInstantiation( |
5000 | VarDecl *NewVar, VarDecl *OldVar, |
5001 | const MultiLevelTemplateArgumentList &TemplateArgs, |
5002 | LateInstantiatedAttrVec *LateAttrs, DeclContext *Owner, |
5003 | LocalInstantiationScope *StartingScope, |
5004 | bool InstantiatingVarTemplate, |
5005 | VarTemplateSpecializationDecl *PrevDeclForVarTemplateSpecialization) { |
5006 | // Instantiating a partial specialization to produce a partial |
5007 | // specialization. |
5008 | bool InstantiatingVarTemplatePartialSpec = |
5009 | isa<VarTemplatePartialSpecializationDecl>(OldVar) && |
5010 | isa<VarTemplatePartialSpecializationDecl>(NewVar); |
5011 | // Instantiating from a variable template (or partial specialization) to |
5012 | // produce a variable template specialization. |
5013 | bool InstantiatingSpecFromTemplate = |
5014 | isa<VarTemplateSpecializationDecl>(NewVar) && |
5015 | (OldVar->getDescribedVarTemplate() || |
5016 | isa<VarTemplatePartialSpecializationDecl>(OldVar)); |
5017 | |
5018 | // If we are instantiating a local extern declaration, the |
5019 | // instantiation belongs lexically to the containing function. |
5020 | // If we are instantiating a static data member defined |
5021 | // out-of-line, the instantiation will have the same lexical |
5022 | // context (which will be a namespace scope) as the template. |
5023 | if (OldVar->isLocalExternDecl()) { |
5024 | NewVar->setLocalExternDecl(); |
5025 | NewVar->setLexicalDeclContext(Owner); |
5026 | } else if (OldVar->isOutOfLine()) |
5027 | NewVar->setLexicalDeclContext(OldVar->getLexicalDeclContext()); |
5028 | NewVar->setTSCSpec(OldVar->getTSCSpec()); |
5029 | NewVar->setInitStyle(OldVar->getInitStyle()); |
5030 | NewVar->setCXXForRangeDecl(OldVar->isCXXForRangeDecl()); |
5031 | NewVar->setObjCForDecl(OldVar->isObjCForDecl()); |
5032 | NewVar->setConstexpr(OldVar->isConstexpr()); |
5033 | MaybeAddCUDAConstantAttr(NewVar); |
5034 | NewVar->setInitCapture(OldVar->isInitCapture()); |
5035 | NewVar->setPreviousDeclInSameBlockScope( |
5036 | OldVar->isPreviousDeclInSameBlockScope()); |
5037 | NewVar->setAccess(OldVar->getAccess()); |
5038 | |
5039 | if (!OldVar->isStaticDataMember()) { |
5040 | if (OldVar->isUsed(false)) |
5041 | NewVar->setIsUsed(); |
5042 | NewVar->setReferenced(OldVar->isReferenced()); |
5043 | } |
5044 | |
5045 | InstantiateAttrs(TemplateArgs, OldVar, NewVar, LateAttrs, StartingScope); |
5046 | |
5047 | LookupResult Previous( |
5048 | *this, NewVar->getDeclName(), NewVar->getLocation(), |
5049 | NewVar->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage |
5050 | : Sema::LookupOrdinaryName, |
5051 | NewVar->isLocalExternDecl() ? Sema::ForExternalRedeclaration |
5052 | : forRedeclarationInCurContext()); |
5053 | |
5054 | if (NewVar->isLocalExternDecl() && OldVar->getPreviousDecl() && |
5055 | (!OldVar->getPreviousDecl()->getDeclContext()->isDependentContext() || |
5056 | OldVar->getPreviousDecl()->getDeclContext()==OldVar->getDeclContext())) { |
5057 | // We have a previous declaration. Use that one, so we merge with the |
5058 | // right type. |
5059 | if (NamedDecl *NewPrev = FindInstantiatedDecl( |
5060 | NewVar->getLocation(), OldVar->getPreviousDecl(), TemplateArgs)) |
5061 | Previous.addDecl(NewPrev); |
5062 | } else if (!isa<VarTemplateSpecializationDecl>(NewVar) && |
5063 | OldVar->hasLinkage()) { |
5064 | LookupQualifiedName(Previous, NewVar->getDeclContext(), false); |
5065 | } else if (PrevDeclForVarTemplateSpecialization) { |
5066 | Previous.addDecl(PrevDeclForVarTemplateSpecialization); |
5067 | } |
5068 | CheckVariableDeclaration(NewVar, Previous); |
5069 | |
5070 | if (!InstantiatingVarTemplate) { |
5071 | NewVar->getLexicalDeclContext()->addHiddenDecl(NewVar); |
5072 | if (!NewVar->isLocalExternDecl() || !NewVar->getPreviousDecl()) |
5073 | NewVar->getDeclContext()->makeDeclVisibleInContext(NewVar); |
5074 | } |
5075 | |
5076 | if (!OldVar->isOutOfLine()) { |
5077 | if (NewVar->getDeclContext()->isFunctionOrMethod()) |
5078 | CurrentInstantiationScope->InstantiatedLocal(OldVar, NewVar); |
5079 | } |
5080 | |
5081 | // Link instantiations of static data members back to the template from |
5082 | // which they were instantiated. |
5083 | // |
5084 | // Don't do this when instantiating a template (we link the template itself |
5085 | // back in that case) nor when instantiating a static data member template |
5086 | // (that's not a member specialization). |
5087 | if (NewVar->isStaticDataMember() && !InstantiatingVarTemplate && |
5088 | !InstantiatingSpecFromTemplate) |
5089 | NewVar->setInstantiationOfStaticDataMember(OldVar, |
5090 | TSK_ImplicitInstantiation); |
5091 | |
5092 | // If the pattern is an (in-class) explicit specialization, then the result |
5093 | // is also an explicit specialization. |
5094 | if (VarTemplateSpecializationDecl *OldVTSD = |
5095 | dyn_cast<VarTemplateSpecializationDecl>(OldVar)) { |
5096 | if (OldVTSD->getSpecializationKind() == TSK_ExplicitSpecialization && |
5097 | !isa<VarTemplatePartialSpecializationDecl>(OldVTSD)) |
5098 | cast<VarTemplateSpecializationDecl>(NewVar)->setSpecializationKind( |
5099 | TSK_ExplicitSpecialization); |
5100 | } |
5101 | |
5102 | // Forward the mangling number from the template to the instantiated decl. |
5103 | Context.setManglingNumber(NewVar, Context.getManglingNumber(OldVar)); |
5104 | Context.setStaticLocalNumber(NewVar, Context.getStaticLocalNumber(OldVar)); |
5105 | |
5106 | // Figure out whether to eagerly instantiate the initializer. |
5107 | if (InstantiatingVarTemplate || InstantiatingVarTemplatePartialSpec) { |
5108 | // We're producing a template. Don't instantiate the initializer yet. |
5109 | } else if (NewVar->getType()->isUndeducedType()) { |
5110 | // We need the type to complete the declaration of the variable. |
5111 | InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs); |
5112 | } else if (InstantiatingSpecFromTemplate || |
5113 | (OldVar->isInline() && OldVar->isThisDeclarationADefinition() && |
5114 | !NewVar->isThisDeclarationADefinition())) { |
5115 | // Delay instantiation of the initializer for variable template |
5116 | // specializations or inline static data members until a definition of the |
5117 | // variable is needed. |
5118 | } else { |
5119 | InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs); |
5120 | } |
5121 | |
5122 | // Diagnose unused local variables with dependent types, where the diagnostic |
5123 | // will have been deferred. |
5124 | if (!NewVar->isInvalidDecl() && |
5125 | NewVar->getDeclContext()->isFunctionOrMethod() && |
5126 | OldVar->getType()->isDependentType()) |
5127 | DiagnoseUnusedDecl(NewVar); |
5128 | } |
5129 | |
5130 | /// Instantiate the initializer of a variable. |
5131 | void Sema::InstantiateVariableInitializer( |
5132 | VarDecl *Var, VarDecl *OldVar, |
5133 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
5134 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) |
5135 | L->VariableDefinitionInstantiated(Var); |
5136 | |
5137 | // We propagate the 'inline' flag with the initializer, because it |
5138 | // would otherwise imply that the variable is a definition for a |
5139 | // non-static data member. |
5140 | if (OldVar->isInlineSpecified()) |
5141 | Var->setInlineSpecified(); |
5142 | else if (OldVar->isInline()) |
5143 | Var->setImplicitlyInline(); |
5144 | |
5145 | if (OldVar->getInit()) { |
5146 | EnterExpressionEvaluationContext Evaluated( |
5147 | *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated, Var); |
5148 | |
5149 | // Instantiate the initializer. |
5150 | ExprResult Init; |
5151 | |
5152 | { |
5153 | ContextRAII SwitchContext(*this, Var->getDeclContext()); |
5154 | Init = SubstInitializer(OldVar->getInit(), TemplateArgs, |
5155 | OldVar->getInitStyle() == VarDecl::CallInit); |
5156 | } |
5157 | |
5158 | if (!Init.isInvalid()) { |
5159 | Expr *InitExpr = Init.get(); |
5160 | |
5161 | if (Var->hasAttr<DLLImportAttr>() && |
5162 | (!InitExpr || |
5163 | !InitExpr->isConstantInitializer(getASTContext(), false))) { |
5164 | // Do not dynamically initialize dllimport variables. |
5165 | } else if (InitExpr) { |
5166 | bool DirectInit = OldVar->isDirectInit(); |
5167 | AddInitializerToDecl(Var, InitExpr, DirectInit); |
5168 | } else |
5169 | ActOnUninitializedDecl(Var); |
5170 | } else { |
5171 | // FIXME: Not too happy about invalidating the declaration |
5172 | // because of a bogus initializer. |
5173 | Var->setInvalidDecl(); |
5174 | } |
5175 | } else { |
5176 | // `inline` variables are a definition and declaration all in one; we won't |
5177 | // pick up an initializer from anywhere else. |
5178 | if (Var->isStaticDataMember() && !Var->isInline()) { |
5179 | if (!Var->isOutOfLine()) |
5180 | return; |
5181 | |
5182 | // If the declaration inside the class had an initializer, don't add |
5183 | // another one to the out-of-line definition. |
5184 | if (OldVar->getFirstDecl()->hasInit()) |
5185 | return; |
5186 | } |
5187 | |
5188 | // We'll add an initializer to a for-range declaration later. |
5189 | if (Var->isCXXForRangeDecl() || Var->isObjCForDecl()) |
5190 | return; |
5191 | |
5192 | ActOnUninitializedDecl(Var); |
5193 | } |
5194 | |
5195 | if (getLangOpts().CUDA) |
5196 | checkAllowedCUDAInitializer(Var); |
5197 | } |
5198 | |
5199 | /// Instantiate the definition of the given variable from its |
5200 | /// template. |
5201 | /// |
5202 | /// \param PointOfInstantiation the point at which the instantiation was |
5203 | /// required. Note that this is not precisely a "point of instantiation" |
5204 | /// for the variable, but it's close. |
5205 | /// |
5206 | /// \param Var the already-instantiated declaration of a templated variable. |
5207 | /// |
5208 | /// \param Recursive if true, recursively instantiates any functions that |
5209 | /// are required by this instantiation. |
5210 | /// |
5211 | /// \param DefinitionRequired if true, then we are performing an explicit |
5212 | /// instantiation where a definition of the variable is required. Complain |
5213 | /// if there is no such definition. |
5214 | void Sema::InstantiateVariableDefinition(SourceLocation PointOfInstantiation, |
5215 | VarDecl *Var, bool Recursive, |
5216 | bool DefinitionRequired, bool AtEndOfTU) { |
5217 | if (Var->isInvalidDecl()) |
5218 | return; |
5219 | |
5220 | // Never instantiate an explicitly-specialized entity. |
5221 | TemplateSpecializationKind TSK = |
5222 | Var->getTemplateSpecializationKindForInstantiation(); |
5223 | if (TSK == TSK_ExplicitSpecialization) |
5224 | return; |
5225 | |
5226 | // Find the pattern and the arguments to substitute into it. |
5227 | VarDecl *PatternDecl = Var->getTemplateInstantiationPattern(); |
5228 | assert(PatternDecl && "no pattern for templated variable")((PatternDecl && "no pattern for templated variable") ? static_cast<void> (0) : __assert_fail ("PatternDecl && \"no pattern for templated variable\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5228, __PRETTY_FUNCTION__)); |
5229 | MultiLevelTemplateArgumentList TemplateArgs = |
5230 | getTemplateInstantiationArgs(Var); |
5231 | |
5232 | VarTemplateSpecializationDecl *VarSpec = |
5233 | dyn_cast<VarTemplateSpecializationDecl>(Var); |
5234 | if (VarSpec) { |
5235 | // If this is a static data member template, there might be an |
5236 | // uninstantiated initializer on the declaration. If so, instantiate |
5237 | // it now. |
5238 | // |
5239 | // FIXME: This largely duplicates what we would do below. The difference |
5240 | // is that along this path we may instantiate an initializer from an |
5241 | // in-class declaration of the template and instantiate the definition |
5242 | // from a separate out-of-class definition. |
5243 | if (PatternDecl->isStaticDataMember() && |
5244 | (PatternDecl = PatternDecl->getFirstDecl())->hasInit() && |
5245 | !Var->hasInit()) { |
5246 | // FIXME: Factor out the duplicated instantiation context setup/tear down |
5247 | // code here. |
5248 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Var); |
5249 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
5250 | return; |
5251 | PrettyDeclStackTraceEntry CrashInfo(Context, Var, SourceLocation(), |
5252 | "instantiating variable initializer"); |
5253 | |
5254 | // The instantiation is visible here, even if it was first declared in an |
5255 | // unimported module. |
5256 | Var->setVisibleDespiteOwningModule(); |
5257 | |
5258 | // If we're performing recursive template instantiation, create our own |
5259 | // queue of pending implicit instantiations that we will instantiate |
5260 | // later, while we're still within our own instantiation context. |
5261 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
5262 | /*Enabled=*/Recursive); |
5263 | LocalInstantiationScope Local(*this); |
5264 | LocalEagerInstantiationScope LocalInstantiations(*this); |
5265 | |
5266 | // Enter the scope of this instantiation. We don't use |
5267 | // PushDeclContext because we don't have a scope. |
5268 | ContextRAII PreviousContext(*this, Var->getDeclContext()); |
5269 | InstantiateVariableInitializer(Var, PatternDecl, TemplateArgs); |
5270 | PreviousContext.pop(); |
5271 | |
5272 | // This variable may have local implicit instantiations that need to be |
5273 | // instantiated within this scope. |
5274 | LocalInstantiations.perform(); |
5275 | Local.Exit(); |
5276 | GlobalInstantiations.perform(); |
5277 | } |
5278 | } else { |
5279 | assert(Var->isStaticDataMember() && PatternDecl->isStaticDataMember() &&((Var->isStaticDataMember() && PatternDecl->isStaticDataMember () && "not a static data member?") ? static_cast<void > (0) : __assert_fail ("Var->isStaticDataMember() && PatternDecl->isStaticDataMember() && \"not a static data member?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5280, __PRETTY_FUNCTION__)) |
5280 | "not a static data member?")((Var->isStaticDataMember() && PatternDecl->isStaticDataMember () && "not a static data member?") ? static_cast<void > (0) : __assert_fail ("Var->isStaticDataMember() && PatternDecl->isStaticDataMember() && \"not a static data member?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5280, __PRETTY_FUNCTION__)); |
5281 | } |
5282 | |
5283 | VarDecl *Def = PatternDecl->getDefinition(getASTContext()); |
5284 | |
5285 | // If we don't have a definition of the variable template, we won't perform |
5286 | // any instantiation. Rather, we rely on the user to instantiate this |
5287 | // definition (or provide a specialization for it) in another translation |
5288 | // unit. |
5289 | if (!Def && !DefinitionRequired) { |
5290 | if (TSK == TSK_ExplicitInstantiationDefinition) { |
5291 | PendingInstantiations.push_back( |
5292 | std::make_pair(Var, PointOfInstantiation)); |
5293 | } else if (TSK == TSK_ImplicitInstantiation) { |
5294 | // Warn about missing definition at the end of translation unit. |
5295 | if (AtEndOfTU && !getDiagnostics().hasErrorOccurred() && |
5296 | !getSourceManager().isInSystemHeader(PatternDecl->getBeginLoc())) { |
5297 | Diag(PointOfInstantiation, diag::warn_var_template_missing) |
5298 | << Var; |
5299 | Diag(PatternDecl->getLocation(), diag::note_forward_template_decl); |
5300 | if (getLangOpts().CPlusPlus11) |
5301 | Diag(PointOfInstantiation, diag::note_inst_declaration_hint) << Var; |
5302 | } |
5303 | return; |
5304 | } |
5305 | } |
5306 | |
5307 | // FIXME: We need to track the instantiation stack in order to know which |
5308 | // definitions should be visible within this instantiation. |
5309 | // FIXME: Produce diagnostics when Var->getInstantiatedFromStaticDataMember(). |
5310 | if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Var, |
5311 | /*InstantiatedFromMember*/false, |
5312 | PatternDecl, Def, TSK, |
5313 | /*Complain*/DefinitionRequired)) |
5314 | return; |
5315 | |
5316 | // C++11 [temp.explicit]p10: |
5317 | // Except for inline functions, const variables of literal types, variables |
5318 | // of reference types, [...] explicit instantiation declarations |
5319 | // have the effect of suppressing the implicit instantiation of the entity |
5320 | // to which they refer. |
5321 | // |
5322 | // FIXME: That's not exactly the same as "might be usable in constant |
5323 | // expressions", which only allows constexpr variables and const integral |
5324 | // types, not arbitrary const literal types. |
5325 | if (TSK == TSK_ExplicitInstantiationDeclaration && |
5326 | !Var->mightBeUsableInConstantExpressions(getASTContext())) |
5327 | return; |
5328 | |
5329 | // Make sure to pass the instantiated variable to the consumer at the end. |
5330 | struct PassToConsumerRAII { |
5331 | ASTConsumer &Consumer; |
5332 | VarDecl *Var; |
5333 | |
5334 | PassToConsumerRAII(ASTConsumer &Consumer, VarDecl *Var) |
5335 | : Consumer(Consumer), Var(Var) { } |
5336 | |
5337 | ~PassToConsumerRAII() { |
5338 | Consumer.HandleCXXStaticMemberVarInstantiation(Var); |
5339 | } |
5340 | } PassToConsumerRAII(Consumer, Var); |
5341 | |
5342 | // If we already have a definition, we're done. |
5343 | if (VarDecl *Def = Var->getDefinition()) { |
5344 | // We may be explicitly instantiating something we've already implicitly |
5345 | // instantiated. |
5346 | Def->setTemplateSpecializationKind(Var->getTemplateSpecializationKind(), |
5347 | PointOfInstantiation); |
5348 | return; |
5349 | } |
5350 | |
5351 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Var); |
5352 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
5353 | return; |
5354 | PrettyDeclStackTraceEntry CrashInfo(Context, Var, SourceLocation(), |
5355 | "instantiating variable definition"); |
5356 | |
5357 | // If we're performing recursive template instantiation, create our own |
5358 | // queue of pending implicit instantiations that we will instantiate later, |
5359 | // while we're still within our own instantiation context. |
5360 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
5361 | /*Enabled=*/Recursive); |
5362 | |
5363 | // Enter the scope of this instantiation. We don't use |
5364 | // PushDeclContext because we don't have a scope. |
5365 | ContextRAII PreviousContext(*this, Var->getDeclContext()); |
5366 | LocalInstantiationScope Local(*this); |
5367 | |
5368 | LocalEagerInstantiationScope LocalInstantiations(*this); |
5369 | |
5370 | VarDecl *OldVar = Var; |
5371 | if (Def->isStaticDataMember() && !Def->isOutOfLine()) { |
5372 | // We're instantiating an inline static data member whose definition was |
5373 | // provided inside the class. |
5374 | InstantiateVariableInitializer(Var, Def, TemplateArgs); |
5375 | } else if (!VarSpec) { |
5376 | Var = cast_or_null<VarDecl>(SubstDecl(Def, Var->getDeclContext(), |
5377 | TemplateArgs)); |
5378 | } else if (Var->isStaticDataMember() && |
5379 | Var->getLexicalDeclContext()->isRecord()) { |
5380 | // We need to instantiate the definition of a static data member template, |
5381 | // and all we have is the in-class declaration of it. Instantiate a separate |
5382 | // declaration of the definition. |
5383 | TemplateDeclInstantiator Instantiator(*this, Var->getDeclContext(), |
5384 | TemplateArgs); |
5385 | Var = cast_or_null<VarDecl>(Instantiator.VisitVarTemplateSpecializationDecl( |
5386 | VarSpec->getSpecializedTemplate(), Def, VarSpec->getTemplateArgsInfo(), |
5387 | VarSpec->getTemplateArgs().asArray(), VarSpec)); |
5388 | if (Var) { |
5389 | llvm::PointerUnion<VarTemplateDecl *, |
5390 | VarTemplatePartialSpecializationDecl *> PatternPtr = |
5391 | VarSpec->getSpecializedTemplateOrPartial(); |
5392 | if (VarTemplatePartialSpecializationDecl *Partial = |
5393 | PatternPtr.dyn_cast<VarTemplatePartialSpecializationDecl *>()) |
5394 | cast<VarTemplateSpecializationDecl>(Var)->setInstantiationOf( |
5395 | Partial, &VarSpec->getTemplateInstantiationArgs()); |
5396 | |
5397 | // Attach the initializer. |
5398 | InstantiateVariableInitializer(Var, Def, TemplateArgs); |
5399 | } |
5400 | } else |
5401 | // Complete the existing variable's definition with an appropriately |
5402 | // substituted type and initializer. |
5403 | Var = CompleteVarTemplateSpecializationDecl(VarSpec, Def, TemplateArgs); |
5404 | |
5405 | PreviousContext.pop(); |
5406 | |
5407 | if (Var) { |
5408 | PassToConsumerRAII.Var = Var; |
5409 | Var->setTemplateSpecializationKind(OldVar->getTemplateSpecializationKind(), |
5410 | OldVar->getPointOfInstantiation()); |
5411 | } |
5412 | |
5413 | // This variable may have local implicit instantiations that need to be |
5414 | // instantiated within this scope. |
5415 | LocalInstantiations.perform(); |
5416 | Local.Exit(); |
5417 | GlobalInstantiations.perform(); |
5418 | } |
5419 | |
5420 | void |
5421 | Sema::InstantiateMemInitializers(CXXConstructorDecl *New, |
5422 | const CXXConstructorDecl *Tmpl, |
5423 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
5424 | |
5425 | SmallVector<CXXCtorInitializer*, 4> NewInits; |
5426 | bool AnyErrors = Tmpl->isInvalidDecl(); |
5427 | |
5428 | // Instantiate all the initializers. |
5429 | for (const auto *Init : Tmpl->inits()) { |
5430 | // Only instantiate written initializers, let Sema re-construct implicit |
5431 | // ones. |
5432 | if (!Init->isWritten()) |
5433 | continue; |
5434 | |
5435 | SourceLocation EllipsisLoc; |
5436 | |
5437 | if (Init->isPackExpansion()) { |
5438 | // This is a pack expansion. We should expand it now. |
5439 | TypeLoc BaseTL = Init->getTypeSourceInfo()->getTypeLoc(); |
5440 | SmallVector<UnexpandedParameterPack, 4> Unexpanded; |
5441 | collectUnexpandedParameterPacks(BaseTL, Unexpanded); |
5442 | collectUnexpandedParameterPacks(Init->getInit(), Unexpanded); |
5443 | bool ShouldExpand = false; |
5444 | bool RetainExpansion = false; |
5445 | Optional<unsigned> NumExpansions; |
5446 | if (CheckParameterPacksForExpansion(Init->getEllipsisLoc(), |
5447 | BaseTL.getSourceRange(), |
5448 | Unexpanded, |
5449 | TemplateArgs, ShouldExpand, |
5450 | RetainExpansion, |
5451 | NumExpansions)) { |
5452 | AnyErrors = true; |
5453 | New->setInvalidDecl(); |
5454 | continue; |
5455 | } |
5456 | assert(ShouldExpand && "Partial instantiation of base initializer?")((ShouldExpand && "Partial instantiation of base initializer?" ) ? static_cast<void> (0) : __assert_fail ("ShouldExpand && \"Partial instantiation of base initializer?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5456, __PRETTY_FUNCTION__)); |
5457 | |
5458 | // Loop over all of the arguments in the argument pack(s), |
5459 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
5460 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I); |
5461 | |
5462 | // Instantiate the initializer. |
5463 | ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs, |
5464 | /*CXXDirectInit=*/true); |
5465 | if (TempInit.isInvalid()) { |
5466 | AnyErrors = true; |
5467 | break; |
5468 | } |
5469 | |
5470 | // Instantiate the base type. |
5471 | TypeSourceInfo *BaseTInfo = SubstType(Init->getTypeSourceInfo(), |
5472 | TemplateArgs, |
5473 | Init->getSourceLocation(), |
5474 | New->getDeclName()); |
5475 | if (!BaseTInfo) { |
5476 | AnyErrors = true; |
5477 | break; |
5478 | } |
5479 | |
5480 | // Build the initializer. |
5481 | MemInitResult NewInit = BuildBaseInitializer(BaseTInfo->getType(), |
5482 | BaseTInfo, TempInit.get(), |
5483 | New->getParent(), |
5484 | SourceLocation()); |
5485 | if (NewInit.isInvalid()) { |
5486 | AnyErrors = true; |
5487 | break; |
5488 | } |
5489 | |
5490 | NewInits.push_back(NewInit.get()); |
5491 | } |
5492 | |
5493 | continue; |
5494 | } |
5495 | |
5496 | // Instantiate the initializer. |
5497 | ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs, |
5498 | /*CXXDirectInit=*/true); |
5499 | if (TempInit.isInvalid()) { |
5500 | AnyErrors = true; |
5501 | continue; |
5502 | } |
5503 | |
5504 | MemInitResult NewInit; |
5505 | if (Init->isDelegatingInitializer() || Init->isBaseInitializer()) { |
5506 | TypeSourceInfo *TInfo = SubstType(Init->getTypeSourceInfo(), |
5507 | TemplateArgs, |
5508 | Init->getSourceLocation(), |
5509 | New->getDeclName()); |
5510 | if (!TInfo) { |
5511 | AnyErrors = true; |
5512 | New->setInvalidDecl(); |
5513 | continue; |
5514 | } |
5515 | |
5516 | if (Init->isBaseInitializer()) |
5517 | NewInit = BuildBaseInitializer(TInfo->getType(), TInfo, TempInit.get(), |
5518 | New->getParent(), EllipsisLoc); |
5519 | else |
5520 | NewInit = BuildDelegatingInitializer(TInfo, TempInit.get(), |
5521 | cast<CXXRecordDecl>(CurContext->getParent())); |
5522 | } else if (Init->isMemberInitializer()) { |
5523 | FieldDecl *Member = cast_or_null<FieldDecl>(FindInstantiatedDecl( |
5524 | Init->getMemberLocation(), |
5525 | Init->getMember(), |
5526 | TemplateArgs)); |
5527 | if (!Member) { |
5528 | AnyErrors = true; |
5529 | New->setInvalidDecl(); |
5530 | continue; |
5531 | } |
5532 | |
5533 | NewInit = BuildMemberInitializer(Member, TempInit.get(), |
5534 | Init->getSourceLocation()); |
5535 | } else if (Init->isIndirectMemberInitializer()) { |
5536 | IndirectFieldDecl *IndirectMember = |
5537 | cast_or_null<IndirectFieldDecl>(FindInstantiatedDecl( |
5538 | Init->getMemberLocation(), |
5539 | Init->getIndirectMember(), TemplateArgs)); |
5540 | |
5541 | if (!IndirectMember) { |
5542 | AnyErrors = true; |
5543 | New->setInvalidDecl(); |
5544 | continue; |
5545 | } |
5546 | |
5547 | NewInit = BuildMemberInitializer(IndirectMember, TempInit.get(), |
5548 | Init->getSourceLocation()); |
5549 | } |
5550 | |
5551 | if (NewInit.isInvalid()) { |
5552 | AnyErrors = true; |
5553 | New->setInvalidDecl(); |
5554 | } else { |
5555 | NewInits.push_back(NewInit.get()); |
5556 | } |
5557 | } |
5558 | |
5559 | // Assign all the initializers to the new constructor. |
5560 | ActOnMemInitializers(New, |
5561 | /*FIXME: ColonLoc */ |
5562 | SourceLocation(), |
5563 | NewInits, |
5564 | AnyErrors); |
5565 | } |
5566 | |
5567 | // TODO: this could be templated if the various decl types used the |
5568 | // same method name. |
5569 | static bool isInstantiationOf(ClassTemplateDecl *Pattern, |
5570 | ClassTemplateDecl *Instance) { |
5571 | Pattern = Pattern->getCanonicalDecl(); |
5572 | |
5573 | do { |
5574 | Instance = Instance->getCanonicalDecl(); |
5575 | if (Pattern == Instance) return true; |
5576 | Instance = Instance->getInstantiatedFromMemberTemplate(); |
5577 | } while (Instance); |
5578 | |
5579 | return false; |
5580 | } |
5581 | |
5582 | static bool isInstantiationOf(FunctionTemplateDecl *Pattern, |
5583 | FunctionTemplateDecl *Instance) { |
5584 | Pattern = Pattern->getCanonicalDecl(); |
5585 | |
5586 | do { |
5587 | Instance = Instance->getCanonicalDecl(); |
5588 | if (Pattern == Instance) return true; |
5589 | Instance = Instance->getInstantiatedFromMemberTemplate(); |
5590 | } while (Instance); |
5591 | |
5592 | return false; |
5593 | } |
5594 | |
5595 | static bool |
5596 | isInstantiationOf(ClassTemplatePartialSpecializationDecl *Pattern, |
5597 | ClassTemplatePartialSpecializationDecl *Instance) { |
5598 | Pattern |
5599 | = cast<ClassTemplatePartialSpecializationDecl>(Pattern->getCanonicalDecl()); |
5600 | do { |
5601 | Instance = cast<ClassTemplatePartialSpecializationDecl>( |
5602 | Instance->getCanonicalDecl()); |
5603 | if (Pattern == Instance) |
5604 | return true; |
5605 | Instance = Instance->getInstantiatedFromMember(); |
5606 | } while (Instance); |
5607 | |
5608 | return false; |
5609 | } |
5610 | |
5611 | static bool isInstantiationOf(CXXRecordDecl *Pattern, |
5612 | CXXRecordDecl *Instance) { |
5613 | Pattern = Pattern->getCanonicalDecl(); |
5614 | |
5615 | do { |
5616 | Instance = Instance->getCanonicalDecl(); |
5617 | if (Pattern == Instance) return true; |
5618 | Instance = Instance->getInstantiatedFromMemberClass(); |
5619 | } while (Instance); |
5620 | |
5621 | return false; |
5622 | } |
5623 | |
5624 | static bool isInstantiationOf(FunctionDecl *Pattern, |
5625 | FunctionDecl *Instance) { |
5626 | Pattern = Pattern->getCanonicalDecl(); |
5627 | |
5628 | do { |
5629 | Instance = Instance->getCanonicalDecl(); |
5630 | if (Pattern == Instance) return true; |
5631 | Instance = Instance->getInstantiatedFromMemberFunction(); |
5632 | } while (Instance); |
5633 | |
5634 | return false; |
5635 | } |
5636 | |
5637 | static bool isInstantiationOf(EnumDecl *Pattern, |
5638 | EnumDecl *Instance) { |
5639 | Pattern = Pattern->getCanonicalDecl(); |
5640 | |
5641 | do { |
5642 | Instance = Instance->getCanonicalDecl(); |
5643 | if (Pattern == Instance) return true; |
5644 | Instance = Instance->getInstantiatedFromMemberEnum(); |
5645 | } while (Instance); |
5646 | |
5647 | return false; |
5648 | } |
5649 | |
5650 | static bool isInstantiationOf(UsingShadowDecl *Pattern, |
5651 | UsingShadowDecl *Instance, |
5652 | ASTContext &C) { |
5653 | return declaresSameEntity(C.getInstantiatedFromUsingShadowDecl(Instance), |
5654 | Pattern); |
5655 | } |
5656 | |
5657 | static bool isInstantiationOf(UsingDecl *Pattern, UsingDecl *Instance, |
5658 | ASTContext &C) { |
5659 | return declaresSameEntity(C.getInstantiatedFromUsingDecl(Instance), Pattern); |
5660 | } |
5661 | |
5662 | template<typename T> |
5663 | static bool isInstantiationOfUnresolvedUsingDecl(T *Pattern, Decl *Other, |
5664 | ASTContext &Ctx) { |
5665 | // An unresolved using declaration can instantiate to an unresolved using |
5666 | // declaration, or to a using declaration or a using declaration pack. |
5667 | // |
5668 | // Multiple declarations can claim to be instantiated from an unresolved |
5669 | // using declaration if it's a pack expansion. We want the UsingPackDecl |
5670 | // in that case, not the individual UsingDecls within the pack. |
5671 | bool OtherIsPackExpansion; |
5672 | NamedDecl *OtherFrom; |
5673 | if (auto *OtherUUD = dyn_cast<T>(Other)) { |
5674 | OtherIsPackExpansion = OtherUUD->isPackExpansion(); |
5675 | OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUUD); |
5676 | } else if (auto *OtherUPD = dyn_cast<UsingPackDecl>(Other)) { |
5677 | OtherIsPackExpansion = true; |
5678 | OtherFrom = OtherUPD->getInstantiatedFromUsingDecl(); |
5679 | } else if (auto *OtherUD = dyn_cast<UsingDecl>(Other)) { |
5680 | OtherIsPackExpansion = false; |
5681 | OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUD); |
5682 | } else { |
5683 | return false; |
5684 | } |
5685 | return Pattern->isPackExpansion() == OtherIsPackExpansion && |
5686 | declaresSameEntity(OtherFrom, Pattern); |
5687 | } |
5688 | |
5689 | static bool isInstantiationOfStaticDataMember(VarDecl *Pattern, |
5690 | VarDecl *Instance) { |
5691 | assert(Instance->isStaticDataMember())((Instance->isStaticDataMember()) ? static_cast<void> (0) : __assert_fail ("Instance->isStaticDataMember()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5691, __PRETTY_FUNCTION__)); |
5692 | |
5693 | Pattern = Pattern->getCanonicalDecl(); |
5694 | |
5695 | do { |
5696 | Instance = Instance->getCanonicalDecl(); |
5697 | if (Pattern == Instance) return true; |
5698 | Instance = Instance->getInstantiatedFromStaticDataMember(); |
5699 | } while (Instance); |
5700 | |
5701 | return false; |
5702 | } |
5703 | |
5704 | // Other is the prospective instantiation |
5705 | // D is the prospective pattern |
5706 | static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) { |
5707 | if (auto *UUD = dyn_cast<UnresolvedUsingTypenameDecl>(D)) |
5708 | return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx); |
5709 | |
5710 | if (auto *UUD = dyn_cast<UnresolvedUsingValueDecl>(D)) |
5711 | return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx); |
5712 | |
5713 | if (D->getKind() != Other->getKind()) |
5714 | return false; |
5715 | |
5716 | if (auto *Record = dyn_cast<CXXRecordDecl>(Other)) |
5717 | return isInstantiationOf(cast<CXXRecordDecl>(D), Record); |
5718 | |
5719 | if (auto *Function = dyn_cast<FunctionDecl>(Other)) |
5720 | return isInstantiationOf(cast<FunctionDecl>(D), Function); |
5721 | |
5722 | if (auto *Enum = dyn_cast<EnumDecl>(Other)) |
5723 | return isInstantiationOf(cast<EnumDecl>(D), Enum); |
5724 | |
5725 | if (auto *Var = dyn_cast<VarDecl>(Other)) |
5726 | if (Var->isStaticDataMember()) |
5727 | return isInstantiationOfStaticDataMember(cast<VarDecl>(D), Var); |
5728 | |
5729 | if (auto *Temp = dyn_cast<ClassTemplateDecl>(Other)) |
5730 | return isInstantiationOf(cast<ClassTemplateDecl>(D), Temp); |
5731 | |
5732 | if (auto *Temp = dyn_cast<FunctionTemplateDecl>(Other)) |
5733 | return isInstantiationOf(cast<FunctionTemplateDecl>(D), Temp); |
5734 | |
5735 | if (auto *PartialSpec = |
5736 | dyn_cast<ClassTemplatePartialSpecializationDecl>(Other)) |
5737 | return isInstantiationOf(cast<ClassTemplatePartialSpecializationDecl>(D), |
5738 | PartialSpec); |
5739 | |
5740 | if (auto *Field = dyn_cast<FieldDecl>(Other)) { |
5741 | if (!Field->getDeclName()) { |
5742 | // This is an unnamed field. |
5743 | return declaresSameEntity(Ctx.getInstantiatedFromUnnamedFieldDecl(Field), |
5744 | cast<FieldDecl>(D)); |
5745 | } |
5746 | } |
5747 | |
5748 | if (auto *Using = dyn_cast<UsingDecl>(Other)) |
5749 | return isInstantiationOf(cast<UsingDecl>(D), Using, Ctx); |
5750 | |
5751 | if (auto *Shadow = dyn_cast<UsingShadowDecl>(Other)) |
5752 | return isInstantiationOf(cast<UsingShadowDecl>(D), Shadow, Ctx); |
5753 | |
5754 | return D->getDeclName() && |
5755 | D->getDeclName() == cast<NamedDecl>(Other)->getDeclName(); |
5756 | } |
5757 | |
5758 | template<typename ForwardIterator> |
5759 | static NamedDecl *findInstantiationOf(ASTContext &Ctx, |
5760 | NamedDecl *D, |
5761 | ForwardIterator first, |
5762 | ForwardIterator last) { |
5763 | for (; first != last; ++first) |
5764 | if (isInstantiationOf(Ctx, D, *first)) |
5765 | return cast<NamedDecl>(*first); |
5766 | |
5767 | return nullptr; |
5768 | } |
5769 | |
5770 | /// Finds the instantiation of the given declaration context |
5771 | /// within the current instantiation. |
5772 | /// |
5773 | /// \returns NULL if there was an error |
5774 | DeclContext *Sema::FindInstantiatedContext(SourceLocation Loc, DeclContext* DC, |
5775 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
5776 | if (NamedDecl *D = dyn_cast<NamedDecl>(DC)) { |
5777 | Decl* ID = FindInstantiatedDecl(Loc, D, TemplateArgs, true); |
5778 | return cast_or_null<DeclContext>(ID); |
5779 | } else return DC; |
5780 | } |
5781 | |
5782 | /// Determine whether the given context is dependent on template parameters at |
5783 | /// level \p Level or below. |
5784 | /// |
5785 | /// Sometimes we only substitute an inner set of template arguments and leave |
5786 | /// the outer templates alone. In such cases, contexts dependent only on the |
5787 | /// outer levels are not effectively dependent. |
5788 | static bool isDependentContextAtLevel(DeclContext *DC, unsigned Level) { |
5789 | if (!DC->isDependentContext()) |
5790 | return false; |
5791 | if (!Level) |
5792 | return true; |
5793 | return cast<Decl>(DC)->getTemplateDepth() > Level; |
5794 | } |
5795 | |
5796 | /// Find the instantiation of the given declaration within the |
5797 | /// current instantiation. |
5798 | /// |
5799 | /// This routine is intended to be used when \p D is a declaration |
5800 | /// referenced from within a template, that needs to mapped into the |
5801 | /// corresponding declaration within an instantiation. For example, |
5802 | /// given: |
5803 | /// |
5804 | /// \code |
5805 | /// template<typename T> |
5806 | /// struct X { |
5807 | /// enum Kind { |
5808 | /// KnownValue = sizeof(T) |
5809 | /// }; |
5810 | /// |
5811 | /// bool getKind() const { return KnownValue; } |
5812 | /// }; |
5813 | /// |
5814 | /// template struct X<int>; |
5815 | /// \endcode |
5816 | /// |
5817 | /// In the instantiation of X<int>::getKind(), we need to map the \p |
5818 | /// EnumConstantDecl for \p KnownValue (which refers to |
5819 | /// X<T>::<Kind>::KnownValue) to its instantiation (X<int>::<Kind>::KnownValue). |
5820 | /// \p FindInstantiatedDecl performs this mapping from within the instantiation |
5821 | /// of X<int>. |
5822 | NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, |
5823 | const MultiLevelTemplateArgumentList &TemplateArgs, |
5824 | bool FindingInstantiatedContext) { |
5825 | DeclContext *ParentDC = D->getDeclContext(); |
5826 | // Determine whether our parent context depends on any of the tempalte |
5827 | // arguments we're currently substituting. |
5828 | bool ParentDependsOnArgs = isDependentContextAtLevel( |
5829 | ParentDC, TemplateArgs.getNumRetainedOuterLevels()); |
5830 | // FIXME: Parmeters of pointer to functions (y below) that are themselves |
5831 | // parameters (p below) can have their ParentDC set to the translation-unit |
5832 | // - thus we can not consistently check if the ParentDC of such a parameter |
5833 | // is Dependent or/and a FunctionOrMethod. |
5834 | // For e.g. this code, during Template argument deduction tries to |
5835 | // find an instantiated decl for (T y) when the ParentDC for y is |
5836 | // the translation unit. |
5837 | // e.g. template <class T> void Foo(auto (*p)(T y) -> decltype(y())) {} |
5838 | // float baz(float(*)()) { return 0.0; } |
5839 | // Foo(baz); |
5840 | // The better fix here is perhaps to ensure that a ParmVarDecl, by the time |
5841 | // it gets here, always has a FunctionOrMethod as its ParentDC?? |
5842 | // For now: |
5843 | // - as long as we have a ParmVarDecl whose parent is non-dependent and |
5844 | // whose type is not instantiation dependent, do nothing to the decl |
5845 | // - otherwise find its instantiated decl. |
5846 | if (isa<ParmVarDecl>(D) && !ParentDependsOnArgs && |
5847 | !cast<ParmVarDecl>(D)->getType()->isInstantiationDependentType()) |
5848 | return D; |
5849 | if (isa<ParmVarDecl>(D) || isa<NonTypeTemplateParmDecl>(D) || |
5850 | isa<TemplateTypeParmDecl>(D) || isa<TemplateTemplateParmDecl>(D) || |
5851 | (ParentDependsOnArgs && (ParentDC->isFunctionOrMethod() || |
5852 | isa<OMPDeclareReductionDecl>(ParentDC) || |
5853 | isa<OMPDeclareMapperDecl>(ParentDC))) || |
5854 | (isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda())) { |
5855 | // D is a local of some kind. Look into the map of local |
5856 | // declarations to their instantiations. |
5857 | if (CurrentInstantiationScope) { |
5858 | if (auto Found = CurrentInstantiationScope->findInstantiationOf(D)) { |
5859 | if (Decl *FD = Found->dyn_cast<Decl *>()) |
5860 | return cast<NamedDecl>(FD); |
5861 | |
5862 | int PackIdx = ArgumentPackSubstitutionIndex; |
5863 | assert(PackIdx != -1 &&((PackIdx != -1 && "found declaration pack but not pack expanding" ) ? static_cast<void> (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5864, __PRETTY_FUNCTION__)) |
5864 | "found declaration pack but not pack expanding")((PackIdx != -1 && "found declaration pack but not pack expanding" ) ? static_cast<void> (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5864, __PRETTY_FUNCTION__)); |
5865 | typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack; |
5866 | return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]); |
5867 | } |
5868 | } |
5869 | |
5870 | // If we're performing a partial substitution during template argument |
5871 | // deduction, we may not have values for template parameters yet. They |
5872 | // just map to themselves. |
5873 | if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) || |
5874 | isa<TemplateTemplateParmDecl>(D)) |
5875 | return D; |
5876 | |
5877 | if (D->isInvalidDecl()) |
5878 | return nullptr; |
5879 | |
5880 | // Normally this function only searches for already instantiated declaration |
5881 | // however we have to make an exclusion for local types used before |
5882 | // definition as in the code: |
5883 | // |
5884 | // template<typename T> void f1() { |
5885 | // void g1(struct x1); |
5886 | // struct x1 {}; |
5887 | // } |
5888 | // |
5889 | // In this case instantiation of the type of 'g1' requires definition of |
5890 | // 'x1', which is defined later. Error recovery may produce an enum used |
5891 | // before definition. In these cases we need to instantiate relevant |
5892 | // declarations here. |
5893 | bool NeedInstantiate = false; |
5894 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) |
5895 | NeedInstantiate = RD->isLocalClass(); |
5896 | else if (isa<TypedefNameDecl>(D) && |
5897 | isa<CXXDeductionGuideDecl>(D->getDeclContext())) |
5898 | NeedInstantiate = true; |
5899 | else |
5900 | NeedInstantiate = isa<EnumDecl>(D); |
5901 | if (NeedInstantiate) { |
5902 | Decl *Inst = SubstDecl(D, CurContext, TemplateArgs); |
5903 | CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
5904 | return cast<TypeDecl>(Inst); |
5905 | } |
5906 | |
5907 | // If we didn't find the decl, then we must have a label decl that hasn't |
5908 | // been found yet. Lazily instantiate it and return it now. |
5909 | assert(isa<LabelDecl>(D))((isa<LabelDecl>(D)) ? static_cast<void> (0) : __assert_fail ("isa<LabelDecl>(D)", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5909, __PRETTY_FUNCTION__)); |
5910 | |
5911 | Decl *Inst = SubstDecl(D, CurContext, TemplateArgs); |
5912 | assert(Inst && "Failed to instantiate label??")((Inst && "Failed to instantiate label??") ? static_cast <void> (0) : __assert_fail ("Inst && \"Failed to instantiate label??\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5912, __PRETTY_FUNCTION__)); |
5913 | |
5914 | CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
5915 | return cast<LabelDecl>(Inst); |
5916 | } |
5917 | |
5918 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { |
5919 | if (!Record->isDependentContext()) |
5920 | return D; |
5921 | |
5922 | // Determine whether this record is the "templated" declaration describing |
5923 | // a class template or class template partial specialization. |
5924 | ClassTemplateDecl *ClassTemplate = Record->getDescribedClassTemplate(); |
5925 | if (ClassTemplate) |
5926 | ClassTemplate = ClassTemplate->getCanonicalDecl(); |
5927 | else if (ClassTemplatePartialSpecializationDecl *PartialSpec |
5928 | = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record)) |
5929 | ClassTemplate = PartialSpec->getSpecializedTemplate()->getCanonicalDecl(); |
5930 | |
5931 | // Walk the current context to find either the record or an instantiation of |
5932 | // it. |
5933 | DeclContext *DC = CurContext; |
5934 | while (!DC->isFileContext()) { |
5935 | // If we're performing substitution while we're inside the template |
5936 | // definition, we'll find our own context. We're done. |
5937 | if (DC->Equals(Record)) |
5938 | return Record; |
5939 | |
5940 | if (CXXRecordDecl *InstRecord = dyn_cast<CXXRecordDecl>(DC)) { |
5941 | // Check whether we're in the process of instantiating a class template |
5942 | // specialization of the template we're mapping. |
5943 | if (ClassTemplateSpecializationDecl *InstSpec |
5944 | = dyn_cast<ClassTemplateSpecializationDecl>(InstRecord)){ |
5945 | ClassTemplateDecl *SpecTemplate = InstSpec->getSpecializedTemplate(); |
5946 | if (ClassTemplate && isInstantiationOf(ClassTemplate, SpecTemplate)) |
5947 | return InstRecord; |
5948 | } |
5949 | |
5950 | // Check whether we're in the process of instantiating a member class. |
5951 | if (isInstantiationOf(Record, InstRecord)) |
5952 | return InstRecord; |
5953 | } |
5954 | |
5955 | // Move to the outer template scope. |
5956 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) { |
5957 | if (FD->getFriendObjectKind() && FD->getDeclContext()->isFileContext()){ |
5958 | DC = FD->getLexicalDeclContext(); |
5959 | continue; |
5960 | } |
5961 | // An implicit deduction guide acts as if it's within the class template |
5962 | // specialization described by its name and first N template params. |
5963 | auto *Guide = dyn_cast<CXXDeductionGuideDecl>(FD); |
5964 | if (Guide && Guide->isImplicit()) { |
5965 | TemplateDecl *TD = Guide->getDeducedTemplate(); |
5966 | // Convert the arguments to an "as-written" list. |
5967 | TemplateArgumentListInfo Args(Loc, Loc); |
5968 | for (TemplateArgument Arg : TemplateArgs.getInnermost().take_front( |
5969 | TD->getTemplateParameters()->size())) { |
5970 | ArrayRef<TemplateArgument> Unpacked(Arg); |
5971 | if (Arg.getKind() == TemplateArgument::Pack) |
5972 | Unpacked = Arg.pack_elements(); |
5973 | for (TemplateArgument UnpackedArg : Unpacked) |
5974 | Args.addArgument( |
5975 | getTrivialTemplateArgumentLoc(UnpackedArg, QualType(), Loc)); |
5976 | } |
5977 | QualType T = CheckTemplateIdType(TemplateName(TD), Loc, Args); |
5978 | if (T.isNull()) |
5979 | return nullptr; |
5980 | auto *SubstRecord = T->getAsCXXRecordDecl(); |
5981 | assert(SubstRecord && "class template id not a class type?")((SubstRecord && "class template id not a class type?" ) ? static_cast<void> (0) : __assert_fail ("SubstRecord && \"class template id not a class type?\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5981, __PRETTY_FUNCTION__)); |
5982 | // Check that this template-id names the primary template and not a |
5983 | // partial or explicit specialization. (In the latter cases, it's |
5984 | // meaningless to attempt to find an instantiation of D within the |
5985 | // specialization.) |
5986 | // FIXME: The standard doesn't say what should happen here. |
5987 | if (FindingInstantiatedContext && |
5988 | usesPartialOrExplicitSpecialization( |
5989 | Loc, cast<ClassTemplateSpecializationDecl>(SubstRecord))) { |
5990 | Diag(Loc, diag::err_specialization_not_primary_template) |
5991 | << T << (SubstRecord->getTemplateSpecializationKind() == |
5992 | TSK_ExplicitSpecialization); |
5993 | return nullptr; |
5994 | } |
5995 | DC = SubstRecord; |
5996 | continue; |
5997 | } |
5998 | } |
5999 | |
6000 | DC = DC->getParent(); |
6001 | } |
6002 | |
6003 | // Fall through to deal with other dependent record types (e.g., |
6004 | // anonymous unions in class templates). |
6005 | } |
6006 | |
6007 | if (!ParentDependsOnArgs) |
6008 | return D; |
6009 | |
6010 | ParentDC = FindInstantiatedContext(Loc, ParentDC, TemplateArgs); |
6011 | if (!ParentDC) |
6012 | return nullptr; |
6013 | |
6014 | if (ParentDC != D->getDeclContext()) { |
6015 | // We performed some kind of instantiation in the parent context, |
6016 | // so now we need to look into the instantiated parent context to |
6017 | // find the instantiation of the declaration D. |
6018 | |
6019 | // If our context used to be dependent, we may need to instantiate |
6020 | // it before performing lookup into that context. |
6021 | bool IsBeingInstantiated = false; |
6022 | if (CXXRecordDecl *Spec = dyn_cast<CXXRecordDecl>(ParentDC)) { |
6023 | if (!Spec->isDependentContext()) { |
6024 | QualType T = Context.getTypeDeclType(Spec); |
6025 | const RecordType *Tag = T->getAs<RecordType>(); |
6026 | assert(Tag && "type of non-dependent record is not a RecordType")((Tag && "type of non-dependent record is not a RecordType" ) ? static_cast<void> (0) : __assert_fail ("Tag && \"type of non-dependent record is not a RecordType\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 6026, __PRETTY_FUNCTION__)); |
6027 | if (Tag->isBeingDefined()) |
6028 | IsBeingInstantiated = true; |
6029 | if (!Tag->isBeingDefined() && |
6030 | RequireCompleteType(Loc, T, diag::err_incomplete_type)) |
6031 | return nullptr; |
6032 | |
6033 | ParentDC = Tag->getDecl(); |
6034 | } |
6035 | } |
6036 | |
6037 | NamedDecl *Result = nullptr; |
6038 | // FIXME: If the name is a dependent name, this lookup won't necessarily |
6039 | // find it. Does that ever matter? |
6040 | if (auto Name = D->getDeclName()) { |
6041 | DeclarationNameInfo NameInfo(Name, D->getLocation()); |
6042 | DeclarationNameInfo NewNameInfo = |
6043 | SubstDeclarationNameInfo(NameInfo, TemplateArgs); |
6044 | Name = NewNameInfo.getName(); |
6045 | if (!Name) |
6046 | return nullptr; |
6047 | DeclContext::lookup_result Found = ParentDC->lookup(Name); |
6048 | |
6049 | Result = findInstantiationOf(Context, D, Found.begin(), Found.end()); |
6050 | } else { |
6051 | // Since we don't have a name for the entity we're looking for, |
6052 | // our only option is to walk through all of the declarations to |
6053 | // find that name. This will occur in a few cases: |
6054 | // |
6055 | // - anonymous struct/union within a template |
6056 | // - unnamed class/struct/union/enum within a template |
6057 | // |
6058 | // FIXME: Find a better way to find these instantiations! |
6059 | Result = findInstantiationOf(Context, D, |
6060 |