Bug Summary

File:tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
Warning:line 4408, column 7
Called C++ object pointer is null

Annotated Source Code

1//===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//===----------------------------------------------------------------------===/
8//
9// This file implements C++ template instantiation for declarations.
10//
11//===----------------------------------------------------------------------===/
12#include "clang/Sema/SemaInternal.h"
13#include "clang/AST/ASTConsumer.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/ASTMutationListener.h"
16#include "clang/AST/DeclTemplate.h"
17#include "clang/AST/DeclVisitor.h"
18#include "clang/AST/DependentDiagnostic.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/ExprCXX.h"
21#include "clang/AST/TypeLoc.h"
22#include "clang/Sema/Initialization.h"
23#include "clang/Sema/Lookup.h"
24#include "clang/Sema/PrettyDeclStackTrace.h"
25#include "clang/Sema/Template.h"
26
27using namespace clang;
28
29static bool isDeclWithinFunction(const Decl *D) {
30 const DeclContext *DC = D->getDeclContext();
31 if (DC->isFunctionOrMethod())
32 return true;
33
34 if (DC->isRecord())
35 return cast<CXXRecordDecl>(DC)->isLocalClass();
36
37 return false;
38}
39
40template<typename DeclT>
41static bool SubstQualifier(Sema &SemaRef, const DeclT *OldDecl, DeclT *NewDecl,
42 const MultiLevelTemplateArgumentList &TemplateArgs) {
43 if (!OldDecl->getQualifierLoc())
44 return false;
45
46 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __PRETTY_FUNCTION__))
47 !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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __PRETTY_FUNCTION__))
48 "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __PRETTY_FUNCTION__))
;
49 Sema::ContextRAII SavedContext(
50 SemaRef,
51 const_cast<DeclContext *>(NewDecl->getFriendObjectKind()
52 ? NewDecl->getLexicalDeclContext()
53 : OldDecl->getLexicalDeclContext()));
54
55 NestedNameSpecifierLoc NewQualifierLoc
56 = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(),
57 TemplateArgs);
58
59 if (!NewQualifierLoc)
60 return true;
61
62 NewDecl->setQualifierInfo(NewQualifierLoc);
63 return false;
64}
65
66bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl,
67 DeclaratorDecl *NewDecl) {
68 return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs);
69}
70
71bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl,
72 TagDecl *NewDecl) {
73 return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs);
74}
75
76// Include attribute instantiation code.
77#include "clang/Sema/AttrTemplateInstantiate.inc"
78
79static void instantiateDependentAlignedAttr(
80 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
81 const AlignedAttr *Aligned, Decl *New, bool IsPackExpansion) {
82 if (Aligned->isAlignmentExpr()) {
83 // The alignment expression is a constant expression.
84 EnterExpressionEvaluationContext Unevaluated(
85 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
86 ExprResult Result = S.SubstExpr(Aligned->getAlignmentExpr(), TemplateArgs);
87 if (!Result.isInvalid())
88 S.AddAlignedAttr(Aligned->getLocation(), New, Result.getAs<Expr>(),
89 Aligned->getSpellingListIndex(), IsPackExpansion);
90 } else {
91 TypeSourceInfo *Result = S.SubstType(Aligned->getAlignmentType(),
92 TemplateArgs, Aligned->getLocation(),
93 DeclarationName());
94 if (Result)
95 S.AddAlignedAttr(Aligned->getLocation(), New, Result,
96 Aligned->getSpellingListIndex(), IsPackExpansion);
97 }
98}
99
100static void instantiateDependentAlignedAttr(
101 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
102 const AlignedAttr *Aligned, Decl *New) {
103 if (!Aligned->isPackExpansion()) {
104 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false);
105 return;
106 }
107
108 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
109 if (Aligned->isAlignmentExpr())
110 S.collectUnexpandedParameterPacks(Aligned->getAlignmentExpr(),
111 Unexpanded);
112 else
113 S.collectUnexpandedParameterPacks(Aligned->getAlignmentType()->getTypeLoc(),
114 Unexpanded);
115 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 115, __PRETTY_FUNCTION__))
;
116
117 // Determine whether we can expand this attribute pack yet.
118 bool Expand = true, RetainExpansion = false;
119 Optional<unsigned> NumExpansions;
120 // FIXME: Use the actual location of the ellipsis.
121 SourceLocation EllipsisLoc = Aligned->getLocation();
122 if (S.CheckParameterPacksForExpansion(EllipsisLoc, Aligned->getRange(),
123 Unexpanded, TemplateArgs, Expand,
124 RetainExpansion, NumExpansions))
125 return;
126
127 if (!Expand) {
128 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, -1);
129 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, true);
130 } else {
131 for (unsigned I = 0; I != *NumExpansions; ++I) {
132 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, I);
133 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false);
134 }
135 }
136}
137
138static void instantiateDependentAssumeAlignedAttr(
139 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
140 const AssumeAlignedAttr *Aligned, Decl *New) {
141 // The alignment expression is a constant expression.
142 EnterExpressionEvaluationContext Unevaluated(
143 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
144
145 Expr *E, *OE = nullptr;
146 ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs);
147 if (Result.isInvalid())
148 return;
149 E = Result.getAs<Expr>();
150
151 if (Aligned->getOffset()) {
152 Result = S.SubstExpr(Aligned->getOffset(), TemplateArgs);
153 if (Result.isInvalid())
154 return;
155 OE = Result.getAs<Expr>();
156 }
157
158 S.AddAssumeAlignedAttr(Aligned->getLocation(), New, E, OE,
159 Aligned->getSpellingListIndex());
160}
161
162static void instantiateDependentAlignValueAttr(
163 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
164 const AlignValueAttr *Aligned, Decl *New) {
165 // The alignment expression is a constant expression.
166 EnterExpressionEvaluationContext Unevaluated(
167 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
168 ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs);
169 if (!Result.isInvalid())
170 S.AddAlignValueAttr(Aligned->getLocation(), New, Result.getAs<Expr>(),
171 Aligned->getSpellingListIndex());
172}
173
174static void instantiateDependentAllocAlignAttr(
175 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
176 const AllocAlignAttr *Align, Decl *New) {
177 Expr *Param = IntegerLiteral::Create(
178 S.getASTContext(), llvm::APInt(64, Align->getParamIndex()),
179 S.getASTContext().UnsignedLongLongTy, Align->getLocation());
180 S.AddAllocAlignAttr(Align->getLocation(), New, Param,
181 Align->getSpellingListIndex());
182}
183
184static Expr *instantiateDependentFunctionAttrCondition(
185 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
186 const Attr *A, Expr *OldCond, const Decl *Tmpl, FunctionDecl *New) {
187 Expr *Cond = nullptr;
188 {
189 Sema::ContextRAII SwitchContext(S, New);
190 EnterExpressionEvaluationContext Unevaluated(
191 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
192 ExprResult Result = S.SubstExpr(OldCond, TemplateArgs);
193 if (Result.isInvalid())
194 return nullptr;
195 Cond = Result.getAs<Expr>();
196 }
197 if (!Cond->isTypeDependent()) {
198 ExprResult Converted = S.PerformContextuallyConvertToBool(Cond);
199 if (Converted.isInvalid())
200 return nullptr;
201 Cond = Converted.get();
202 }
203
204 SmallVector<PartialDiagnosticAt, 8> Diags;
205 if (OldCond->isValueDependent() && !Cond->isValueDependent() &&
206 !Expr::isPotentialConstantExprUnevaluated(Cond, New, Diags)) {
207 S.Diag(A->getLocation(), diag::err_attr_cond_never_constant_expr) << A;
208 for (const auto &P : Diags)
209 S.Diag(P.first, P.second);
210 return nullptr;
211 }
212 return Cond;
213}
214
215static void instantiateDependentEnableIfAttr(
216 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
217 const EnableIfAttr *EIA, const Decl *Tmpl, FunctionDecl *New) {
218 Expr *Cond = instantiateDependentFunctionAttrCondition(
219 S, TemplateArgs, EIA, EIA->getCond(), Tmpl, New);
220
221 if (Cond)
222 New->addAttr(new (S.getASTContext()) EnableIfAttr(
223 EIA->getLocation(), S.getASTContext(), Cond, EIA->getMessage(),
224 EIA->getSpellingListIndex()));
225}
226
227static void instantiateDependentDiagnoseIfAttr(
228 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
229 const DiagnoseIfAttr *DIA, const Decl *Tmpl, FunctionDecl *New) {
230 Expr *Cond = instantiateDependentFunctionAttrCondition(
231 S, TemplateArgs, DIA, DIA->getCond(), Tmpl, New);
232
233 if (Cond)
234 New->addAttr(new (S.getASTContext()) DiagnoseIfAttr(
235 DIA->getLocation(), S.getASTContext(), Cond, DIA->getMessage(),
236 DIA->getDiagnosticType(), DIA->getArgDependent(), New,
237 DIA->getSpellingListIndex()));
238}
239
240// Constructs and adds to New a new instance of CUDALaunchBoundsAttr using
241// template A as the base and arguments from TemplateArgs.
242static void instantiateDependentCUDALaunchBoundsAttr(
243 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
244 const CUDALaunchBoundsAttr &Attr, Decl *New) {
245 // The alignment expression is a constant expression.
246 EnterExpressionEvaluationContext Unevaluated(
247 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
248
249 ExprResult Result = S.SubstExpr(Attr.getMaxThreads(), TemplateArgs);
250 if (Result.isInvalid())
251 return;
252 Expr *MaxThreads = Result.getAs<Expr>();
253
254 Expr *MinBlocks = nullptr;
255 if (Attr.getMinBlocks()) {
256 Result = S.SubstExpr(Attr.getMinBlocks(), TemplateArgs);
257 if (Result.isInvalid())
258 return;
259 MinBlocks = Result.getAs<Expr>();
260 }
261
262 S.AddLaunchBoundsAttr(Attr.getLocation(), New, MaxThreads, MinBlocks,
263 Attr.getSpellingListIndex());
264}
265
266static void
267instantiateDependentModeAttr(Sema &S,
268 const MultiLevelTemplateArgumentList &TemplateArgs,
269 const ModeAttr &Attr, Decl *New) {
270 S.AddModeAttr(Attr.getRange(), New, Attr.getMode(),
271 Attr.getSpellingListIndex(), /*InInstantiation=*/true);
272}
273
274/// Instantiation of 'declare simd' attribute and its arguments.
275static void instantiateOMPDeclareSimdDeclAttr(
276 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
277 const OMPDeclareSimdDeclAttr &Attr, Decl *New) {
278 // Allow 'this' in clauses with varlists.
279 if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New))
280 New = FTD->getTemplatedDecl();
281 auto *FD = cast<FunctionDecl>(New);
282 auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext());
283 SmallVector<Expr *, 4> Uniforms, Aligneds, Alignments, Linears, Steps;
284 SmallVector<unsigned, 4> LinModifiers;
285
286 auto &&Subst = [&](Expr *E) -> ExprResult {
287 if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()))
288 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) {
289 Sema::ContextRAII SavedContext(S, FD);
290 LocalInstantiationScope Local(S);
291 if (FD->getNumParams() > PVD->getFunctionScopeIndex())
292 Local.InstantiatedLocal(
293 PVD, FD->getParamDecl(PVD->getFunctionScopeIndex()));
294 return S.SubstExpr(E, TemplateArgs);
295 }
296 Sema::CXXThisScopeRAII ThisScope(S, ThisContext, /*TypeQuals=*/0,
297 FD->isCXXInstanceMember());
298 return S.SubstExpr(E, TemplateArgs);
299 };
300
301 ExprResult Simdlen;
302 if (auto *E = Attr.getSimdlen())
303 Simdlen = Subst(E);
304
305 if (Attr.uniforms_size() > 0) {
306 for(auto *E : Attr.uniforms()) {
307 ExprResult Inst = Subst(E);
308 if (Inst.isInvalid())
309 continue;
310 Uniforms.push_back(Inst.get());
311 }
312 }
313
314 auto AI = Attr.alignments_begin();
315 for (auto *E : Attr.aligneds()) {
316 ExprResult Inst = Subst(E);
317 if (Inst.isInvalid())
318 continue;
319 Aligneds.push_back(Inst.get());
320 Inst = ExprEmpty();
321 if (*AI)
322 Inst = S.SubstExpr(*AI, TemplateArgs);
323 Alignments.push_back(Inst.get());
324 ++AI;
325 }
326
327 auto SI = Attr.steps_begin();
328 for (auto *E : Attr.linears()) {
329 ExprResult Inst = Subst(E);
330 if (Inst.isInvalid())
331 continue;
332 Linears.push_back(Inst.get());
333 Inst = ExprEmpty();
334 if (*SI)
335 Inst = S.SubstExpr(*SI, TemplateArgs);
336 Steps.push_back(Inst.get());
337 ++SI;
338 }
339 LinModifiers.append(Attr.modifiers_begin(), Attr.modifiers_end());
340 (void)S.ActOnOpenMPDeclareSimdDirective(
341 S.ConvertDeclToDeclGroup(New), Attr.getBranchState(), Simdlen.get(),
342 Uniforms, Aligneds, Alignments, Linears, LinModifiers, Steps,
343 Attr.getRange());
344}
345
346static bool DeclContainsAttr(const Decl *D, const Attr *NewAttr) {
347 if (!D->hasAttrs() || NewAttr->duplicatesAllowed())
348 return false;
349 return llvm::find_if(D->getAttrs(), [NewAttr](const Attr *Attr) {
350 return Attr->getKind() == NewAttr->getKind();
351 }) != D->getAttrs().end();
352}
353
354void Sema::InstantiateAttrsForDecl(
355 const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Tmpl,
356 Decl *New, LateInstantiatedAttrVec *LateAttrs,
357 LocalInstantiationScope *OuterMostScope) {
358 if (NamedDecl *ND = dyn_cast<NamedDecl>(New)) {
359 for (const auto *TmplAttr : Tmpl->attrs()) {
360 // FIXME: If any of the special case versions from InstantiateAttrs become
361 // applicable to template declaration, we'll need to add them here.
362 CXXThisScopeRAII ThisScope(
363 *this, dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()),
364 /*TypeQuals*/ 0, ND->isCXXInstanceMember());
365
366 Attr *NewAttr = sema::instantiateTemplateAttributeForDecl(
367 TmplAttr, Context, *this, TemplateArgs);
368 if (NewAttr && !DeclContainsAttr(New, NewAttr))
369 New->addAttr(NewAttr);
370 }
371 }
372}
373
374void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
375 const Decl *Tmpl, Decl *New,
376 LateInstantiatedAttrVec *LateAttrs,
377 LocalInstantiationScope *OuterMostScope) {
378 for (const auto *TmplAttr : Tmpl->attrs()) {
379 // FIXME: This should be generalized to more than just the AlignedAttr.
380 const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr);
381 if (Aligned && Aligned->isAlignmentDependent()) {
382 instantiateDependentAlignedAttr(*this, TemplateArgs, Aligned, New);
383 continue;
384 }
385
386 const AssumeAlignedAttr *AssumeAligned = dyn_cast<AssumeAlignedAttr>(TmplAttr);
387 if (AssumeAligned) {
388 instantiateDependentAssumeAlignedAttr(*this, TemplateArgs, AssumeAligned, New);
389 continue;
390 }
391
392 const AlignValueAttr *AlignValue = dyn_cast<AlignValueAttr>(TmplAttr);
393 if (AlignValue) {
394 instantiateDependentAlignValueAttr(*this, TemplateArgs, AlignValue, New);
395 continue;
396 }
397
398 if (const auto *AllocAlign = dyn_cast<AllocAlignAttr>(TmplAttr)) {
399 instantiateDependentAllocAlignAttr(*this, TemplateArgs, AllocAlign, New);
400 continue;
401 }
402
403
404 if (const auto *EnableIf = dyn_cast<EnableIfAttr>(TmplAttr)) {
405 instantiateDependentEnableIfAttr(*this, TemplateArgs, EnableIf, Tmpl,
406 cast<FunctionDecl>(New));
407 continue;
408 }
409
410 if (const auto *DiagnoseIf = dyn_cast<DiagnoseIfAttr>(TmplAttr)) {
411 instantiateDependentDiagnoseIfAttr(*this, TemplateArgs, DiagnoseIf, Tmpl,
412 cast<FunctionDecl>(New));
413 continue;
414 }
415
416 if (const CUDALaunchBoundsAttr *CUDALaunchBounds =
417 dyn_cast<CUDALaunchBoundsAttr>(TmplAttr)) {
418 instantiateDependentCUDALaunchBoundsAttr(*this, TemplateArgs,
419 *CUDALaunchBounds, New);
420 continue;
421 }
422
423 if (const ModeAttr *Mode = dyn_cast<ModeAttr>(TmplAttr)) {
424 instantiateDependentModeAttr(*this, TemplateArgs, *Mode, New);
425 continue;
426 }
427
428 if (const auto *OMPAttr = dyn_cast<OMPDeclareSimdDeclAttr>(TmplAttr)) {
429 instantiateOMPDeclareSimdDeclAttr(*this, TemplateArgs, *OMPAttr, New);
430 continue;
431 }
432
433 // Existing DLL attribute on the instantiation takes precedence.
434 if (TmplAttr->getKind() == attr::DLLExport ||
435 TmplAttr->getKind() == attr::DLLImport) {
436 if (New->hasAttr<DLLExportAttr>() || New->hasAttr<DLLImportAttr>()) {
437 continue;
438 }
439 }
440
441 if (auto ABIAttr = dyn_cast<ParameterABIAttr>(TmplAttr)) {
442 AddParameterABIAttr(ABIAttr->getRange(), New, ABIAttr->getABI(),
443 ABIAttr->getSpellingListIndex());
444 continue;
445 }
446
447 if (isa<NSConsumedAttr>(TmplAttr) || isa<CFConsumedAttr>(TmplAttr)) {
448 AddNSConsumedAttr(TmplAttr->getRange(), New,
449 TmplAttr->getSpellingListIndex(),
450 isa<NSConsumedAttr>(TmplAttr),
451 /*template instantiation*/ true);
452 continue;
453 }
454
455 assert(!TmplAttr->isPackExpansion())((!TmplAttr->isPackExpansion()) ? static_cast<void> (
0) : __assert_fail ("!TmplAttr->isPackExpansion()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 455, __PRETTY_FUNCTION__))
;
456 if (TmplAttr->isLateParsed() && LateAttrs) {
457 // Late parsed attributes must be instantiated and attached after the
458 // enclosing class has been instantiated. See Sema::InstantiateClass.
459 LocalInstantiationScope *Saved = nullptr;
460 if (CurrentInstantiationScope)
461 Saved = CurrentInstantiationScope->cloneScopes(OuterMostScope);
462 LateAttrs->push_back(LateInstantiatedAttribute(TmplAttr, Saved, New));
463 } else {
464 // Allow 'this' within late-parsed attributes.
465 NamedDecl *ND = dyn_cast<NamedDecl>(New);
466 CXXRecordDecl *ThisContext =
467 dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext());
468 CXXThisScopeRAII ThisScope(*this, ThisContext, /*TypeQuals*/0,
469 ND && ND->isCXXInstanceMember());
470
471 Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context,
472 *this, TemplateArgs);
473
474 if (NewAttr && !DeclContainsAttr(New, NewAttr))
475 New->addAttr(NewAttr);
476 }
477 }
478}
479
480/// Get the previous declaration of a declaration for the purposes of template
481/// instantiation. If this finds a previous declaration, then the previous
482/// declaration of the instantiation of D should be an instantiation of the
483/// result of this function.
484template<typename DeclT>
485static DeclT *getPreviousDeclForInstantiation(DeclT *D) {
486 DeclT *Result = D->getPreviousDecl();
487
488 // If the declaration is within a class, and the previous declaration was
489 // merged from a different definition of that class, then we don't have a
490 // previous declaration for the purpose of template instantiation.
491 if (Result && isa<CXXRecordDecl>(D->getDeclContext()) &&
492 D->getLexicalDeclContext() != Result->getLexicalDeclContext())
493 return nullptr;
494
495 return Result;
496}
497
498Decl *
499TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
500 llvm_unreachable("Translation units cannot be instantiated")::llvm::llvm_unreachable_internal("Translation units cannot be instantiated"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 500)
;
501}
502
503Decl *
504TemplateDeclInstantiator::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
505 llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 505)
;
506}
507
508Decl *TemplateDeclInstantiator::VisitPragmaDetectMismatchDecl(
509 PragmaDetectMismatchDecl *D) {
510 llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 510)
;
511}
512
513Decl *
514TemplateDeclInstantiator::VisitExternCContextDecl(ExternCContextDecl *D) {
515 llvm_unreachable("extern \"C\" context cannot be instantiated")::llvm::llvm_unreachable_internal("extern \"C\" context cannot be instantiated"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 515)
;
516}
517
518Decl *
519TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) {
520 LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(),
521 D->getIdentifier());
522 Owner->addDecl(Inst);
523 return Inst;
524}
525
526Decl *
527TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) {
528 llvm_unreachable("Namespaces cannot be instantiated")::llvm::llvm_unreachable_internal("Namespaces cannot be instantiated"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 528)
;
529}
530
531Decl *
532TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
533 NamespaceAliasDecl *Inst
534 = NamespaceAliasDecl::Create(SemaRef.Context, Owner,
535 D->getNamespaceLoc(),
536 D->getAliasLoc(),
537 D->getIdentifier(),
538 D->getQualifierLoc(),
539 D->getTargetNameLoc(),
540 D->getNamespace());
541 Owner->addDecl(Inst);
542 return Inst;
543}
544
545Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,
546 bool IsTypeAlias) {
547 bool Invalid = false;
548 TypeSourceInfo *DI = D->getTypeSourceInfo();
549 if (DI->getType()->isInstantiationDependentType() ||
550 DI->getType()->isVariablyModifiedType()) {
551 DI = SemaRef.SubstType(DI, TemplateArgs,
552 D->getLocation(), D->getDeclName());
553 if (!DI) {
554 Invalid = true;
555 DI = SemaRef.Context.getTrivialTypeSourceInfo(SemaRef.Context.IntTy);
556 }
557 } else {
558 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
559 }
560
561 // HACK: g++ has a bug where it gets the value kind of ?: wrong.
562 // libstdc++ relies upon this bug in its implementation of common_type.
563 // If we happen to be processing that implementation, fake up the g++ ?:
564 // semantics. See LWG issue 2141 for more information on the bug.
565 const DecltypeType *DT = DI->getType()->getAs<DecltypeType>();
566 CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
567 if (DT && RD && isa<ConditionalOperator>(DT->getUnderlyingExpr()) &&
568 DT->isReferenceType() &&
569 RD->getEnclosingNamespaceContext() == SemaRef.getStdNamespace() &&
570 RD->getIdentifier() && RD->getIdentifier()->isStr("common_type") &&
571 D->getIdentifier() && D->getIdentifier()->isStr("type") &&
572 SemaRef.getSourceManager().isInSystemHeader(D->getLocStart()))
573 // Fold it to the (non-reference) type which g++ would have produced.
574 DI = SemaRef.Context.getTrivialTypeSourceInfo(
575 DI->getType().getNonReferenceType());
576
577 // Create the new typedef
578 TypedefNameDecl *Typedef;
579 if (IsTypeAlias)
580 Typedef = TypeAliasDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
581 D->getLocation(), D->getIdentifier(), DI);
582 else
583 Typedef = TypedefDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
584 D->getLocation(), D->getIdentifier(), DI);
585 if (Invalid)
586 Typedef->setInvalidDecl();
587
588 // If the old typedef was the name for linkage purposes of an anonymous
589 // tag decl, re-establish that relationship for the new typedef.
590 if (const TagType *oldTagType = D->getUnderlyingType()->getAs<TagType>()) {
591 TagDecl *oldTag = oldTagType->getDecl();
592 if (oldTag->getTypedefNameForAnonDecl() == D && !Invalid) {
593 TagDecl *newTag = DI->getType()->castAs<TagType>()->getDecl();
594 assert(!newTag->hasNameForLinkage())((!newTag->hasNameForLinkage()) ? static_cast<void> (
0) : __assert_fail ("!newTag->hasNameForLinkage()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 594, __PRETTY_FUNCTION__))
;
595 newTag->setTypedefNameForAnonDecl(Typedef);
596 }
597 }
598
599 if (TypedefNameDecl *Prev = getPreviousDeclForInstantiation(D)) {
600 NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(D->getLocation(), Prev,
601 TemplateArgs);
602 if (!InstPrev)
603 return nullptr;
604
605 TypedefNameDecl *InstPrevTypedef = cast<TypedefNameDecl>(InstPrev);
606
607 // If the typedef types are not identical, reject them.
608 SemaRef.isIncompatibleTypedef(InstPrevTypedef, Typedef);
609
610 Typedef->setPreviousDecl(InstPrevTypedef);
611 }
612
613 SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef);
614
615 Typedef->setAccess(D->getAccess());
616
617 return Typedef;
618}
619
620Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
621 Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false);
622 if (Typedef)
623 Owner->addDecl(Typedef);
624 return Typedef;
625}
626
627Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) {
628 Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true);
629 if (Typedef)
630 Owner->addDecl(Typedef);
631 return Typedef;
632}
633
634Decl *
635TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
636 // Create a local instantiation scope for this type alias template, which
637 // will contain the instantiations of the template parameters.
638 LocalInstantiationScope Scope(SemaRef);
639
640 TemplateParameterList *TempParams = D->getTemplateParameters();
641 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
642 if (!InstParams)
643 return nullptr;
644
645 TypeAliasDecl *Pattern = D->getTemplatedDecl();
646
647 TypeAliasTemplateDecl *PrevAliasTemplate = nullptr;
648 if (getPreviousDeclForInstantiation<TypedefNameDecl>(Pattern)) {
649 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
650 if (!Found.empty()) {
651 PrevAliasTemplate = dyn_cast<TypeAliasTemplateDecl>(Found.front());
652 }
653 }
654
655 TypeAliasDecl *AliasInst = cast_or_null<TypeAliasDecl>(
656 InstantiateTypedefNameDecl(Pattern, /*IsTypeAlias=*/true));
657 if (!AliasInst)
658 return nullptr;
659
660 TypeAliasTemplateDecl *Inst
661 = TypeAliasTemplateDecl::Create(SemaRef.Context, Owner, D->getLocation(),
662 D->getDeclName(), InstParams, AliasInst);
663 AliasInst->setDescribedAliasTemplate(Inst);
664 if (PrevAliasTemplate)
665 Inst->setPreviousDecl(PrevAliasTemplate);
666
667 Inst->setAccess(D->getAccess());
668
669 if (!PrevAliasTemplate)
670 Inst->setInstantiatedFromMemberTemplate(D);
671
672 Owner->addDecl(Inst);
673
674 return Inst;
675}
676
677Decl *TemplateDeclInstantiator::VisitBindingDecl(BindingDecl *D) {
678 auto *NewBD = BindingDecl::Create(SemaRef.Context, Owner, D->getLocation(),
679 D->getIdentifier());
680 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewBD);
681 return NewBD;
682}
683
684Decl *TemplateDeclInstantiator::VisitDecompositionDecl(DecompositionDecl *D) {
685 // Transform the bindings first.
686 SmallVector<BindingDecl*, 16> NewBindings;
687 for (auto *OldBD : D->bindings())
688 NewBindings.push_back(cast<BindingDecl>(VisitBindingDecl(OldBD)));
689 ArrayRef<BindingDecl*> NewBindingArray = NewBindings;
690
691 auto *NewDD = cast_or_null<DecompositionDecl>(
692 VisitVarDecl(D, /*InstantiatingVarTemplate=*/false, &NewBindingArray));
693
694 if (!NewDD || NewDD->isInvalidDecl())
695 for (auto *NewBD : NewBindings)
696 NewBD->setInvalidDecl();
697
698 return NewDD;
699}
700
701Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) {
702 return VisitVarDecl(D, /*InstantiatingVarTemplate=*/false);
703}
704
705Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D,
706 bool InstantiatingVarTemplate,
707 ArrayRef<BindingDecl*> *Bindings) {
708
709 // Do substitution on the type of the declaration
710 TypeSourceInfo *DI = SemaRef.SubstType(
711 D->getTypeSourceInfo(), TemplateArgs, D->getTypeSpecStartLoc(),
712 D->getDeclName(), /*AllowDeducedTST*/true);
713 if (!DI)
714 return nullptr;
715
716 if (DI->getType()->isFunctionType()) {
717 SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function)
718 << D->isStaticDataMember() << DI->getType();
719 return nullptr;
720 }
721
722 DeclContext *DC = Owner;
723 if (D->isLocalExternDecl())
724 SemaRef.adjustContextForLocalExternDecl(DC);
725
726 // Build the instantiated declaration.
727 VarDecl *Var;
728 if (Bindings)
729 Var = DecompositionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
730 D->getLocation(), DI->getType(), DI,
731 D->getStorageClass(), *Bindings);
732 else
733 Var = VarDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
734 D->getLocation(), D->getIdentifier(), DI->getType(),
735 DI, D->getStorageClass());
736
737 // In ARC, infer 'retaining' for variables of retainable type.
738 if (SemaRef.getLangOpts().ObjCAutoRefCount &&
739 SemaRef.inferObjCARCLifetime(Var))
740 Var->setInvalidDecl();
741
742 // Substitute the nested name specifier, if any.
743 if (SubstQualifier(D, Var))
744 return nullptr;
745
746 SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner,
747 StartingScope, InstantiatingVarTemplate);
748
749 if (D->isNRVOVariable()) {
750 QualType ReturnType = cast<FunctionDecl>(DC)->getReturnType();
751 if (SemaRef.isCopyElisionCandidate(ReturnType, Var, false))
752 Var->setNRVOVariable(true);
753 }
754
755 Var->setImplicit(D->isImplicit());
756
757 return Var;
758}
759
760Decl *TemplateDeclInstantiator::VisitAccessSpecDecl(AccessSpecDecl *D) {
761 AccessSpecDecl* AD
762 = AccessSpecDecl::Create(SemaRef.Context, D->getAccess(), Owner,
763 D->getAccessSpecifierLoc(), D->getColonLoc());
764 Owner->addHiddenDecl(AD);
765 return AD;
766}
767
768Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) {
769 bool Invalid = false;
770 TypeSourceInfo *DI = D->getTypeSourceInfo();
771 if (DI->getType()->isInstantiationDependentType() ||
772 DI->getType()->isVariablyModifiedType()) {
773 DI = SemaRef.SubstType(DI, TemplateArgs,
774 D->getLocation(), D->getDeclName());
775 if (!DI) {
776 DI = D->getTypeSourceInfo();
777 Invalid = true;
778 } else if (DI->getType()->isFunctionType()) {
779 // C++ [temp.arg.type]p3:
780 // If a declaration acquires a function type through a type
781 // dependent on a template-parameter and this causes a
782 // declaration that does not use the syntactic form of a
783 // function declarator to have function type, the program is
784 // ill-formed.
785 SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
786 << DI->getType();
787 Invalid = true;
788 }
789 } else {
790 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
791 }
792
793 Expr *BitWidth = D->getBitWidth();
794 if (Invalid)
795 BitWidth = nullptr;
796 else if (BitWidth) {
797 // The bit-width expression is a constant expression.
798 EnterExpressionEvaluationContext Unevaluated(
799 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
800
801 ExprResult InstantiatedBitWidth
802 = SemaRef.SubstExpr(BitWidth, TemplateArgs);
803 if (InstantiatedBitWidth.isInvalid()) {
804 Invalid = true;
805 BitWidth = nullptr;
806 } else
807 BitWidth = InstantiatedBitWidth.getAs<Expr>();
808 }
809
810 FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(),
811 DI->getType(), DI,
812 cast<RecordDecl>(Owner),
813 D->getLocation(),
814 D->isMutable(),
815 BitWidth,
816 D->getInClassInitStyle(),
817 D->getInnerLocStart(),
818 D->getAccess(),
819 nullptr);
820 if (!Field) {
821 cast<Decl>(Owner)->setInvalidDecl();
822 return nullptr;
823 }
824
825 SemaRef.InstantiateAttrs(TemplateArgs, D, Field, LateAttrs, StartingScope);
826
827 if (Field->hasAttrs())
828 SemaRef.CheckAlignasUnderalignment(Field);
829
830 if (Invalid)
831 Field->setInvalidDecl();
832
833 if (!Field->getDeclName()) {
834 // Keep track of where this decl came from.
835 SemaRef.Context.setInstantiatedFromUnnamedFieldDecl(Field, D);
836 }
837 if (CXXRecordDecl *Parent= dyn_cast<CXXRecordDecl>(Field->getDeclContext())) {
838 if (Parent->isAnonymousStructOrUnion() &&
839 Parent->getRedeclContext()->isFunctionOrMethod())
840 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Field);
841 }
842
843 Field->setImplicit(D->isImplicit());
844 Field->setAccess(D->getAccess());
845 Owner->addDecl(Field);
846
847 return Field;
848}
849
850Decl *TemplateDeclInstantiator::VisitMSPropertyDecl(MSPropertyDecl *D) {
851 bool Invalid = false;
852 TypeSourceInfo *DI = D->getTypeSourceInfo();
853
854 if (DI->getType()->isVariablyModifiedType()) {
855 SemaRef.Diag(D->getLocation(), diag::err_property_is_variably_modified)
856 << D;
857 Invalid = true;
858 } else if (DI->getType()->isInstantiationDependentType()) {
859 DI = SemaRef.SubstType(DI, TemplateArgs,
860 D->getLocation(), D->getDeclName());
861 if (!DI) {
862 DI = D->getTypeSourceInfo();
863 Invalid = true;
864 } else if (DI->getType()->isFunctionType()) {
865 // C++ [temp.arg.type]p3:
866 // If a declaration acquires a function type through a type
867 // dependent on a template-parameter and this causes a
868 // declaration that does not use the syntactic form of a
869 // function declarator to have function type, the program is
870 // ill-formed.
871 SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
872 << DI->getType();
873 Invalid = true;
874 }
875 } else {
876 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
877 }
878
879 MSPropertyDecl *Property = MSPropertyDecl::Create(
880 SemaRef.Context, Owner, D->getLocation(), D->getDeclName(), DI->getType(),
881 DI, D->getLocStart(), D->getGetterId(), D->getSetterId());
882
883 SemaRef.InstantiateAttrs(TemplateArgs, D, Property, LateAttrs,
884 StartingScope);
885
886 if (Invalid)
887 Property->setInvalidDecl();
888
889 Property->setAccess(D->getAccess());
890 Owner->addDecl(Property);
891
892 return Property;
893}
894
895Decl *TemplateDeclInstantiator::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
896 NamedDecl **NamedChain =
897 new (SemaRef.Context)NamedDecl*[D->getChainingSize()];
898
899 int i = 0;
900 for (auto *PI : D->chain()) {
901 NamedDecl *Next = SemaRef.FindInstantiatedDecl(D->getLocation(), PI,
902 TemplateArgs);
903 if (!Next)
904 return nullptr;
905
906 NamedChain[i++] = Next;
907 }
908
909 QualType T = cast<FieldDecl>(NamedChain[i-1])->getType();
910 IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create(
911 SemaRef.Context, Owner, D->getLocation(), D->getIdentifier(), T,
912 {NamedChain, D->getChainingSize()});
913
914 for (const auto *Attr : D->attrs())
915 IndirectField->addAttr(Attr->clone(SemaRef.Context));
916
917 IndirectField->setImplicit(D->isImplicit());
918 IndirectField->setAccess(D->getAccess());
919 Owner->addDecl(IndirectField);
920 return IndirectField;
921}
922
923Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) {
924 // Handle friend type expressions by simply substituting template
925 // parameters into the pattern type and checking the result.
926 if (TypeSourceInfo *Ty = D->getFriendType()) {
927 TypeSourceInfo *InstTy;
928 // If this is an unsupported friend, don't bother substituting template
929 // arguments into it. The actual type referred to won't be used by any
930 // parts of Clang, and may not be valid for instantiating. Just use the
931 // same info for the instantiated friend.
932 if (D->isUnsupportedFriend()) {
933 InstTy = Ty;
934 } else {
935 InstTy = SemaRef.SubstType(Ty, TemplateArgs,
936 D->getLocation(), DeclarationName());
937 }
938 if (!InstTy)
939 return nullptr;
940
941 FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getLocStart(),
942 D->getFriendLoc(), InstTy);
943 if (!FD)
944 return nullptr;
945
946 FD->setAccess(AS_public);
947 FD->setUnsupportedFriend(D->isUnsupportedFriend());
948 Owner->addDecl(FD);
949 return FD;
950 }
951
952 NamedDecl *ND = D->getFriendDecl();
953 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!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 953, __PRETTY_FUNCTION__))
;
954
955 // All of the Visit implementations for the various potential friend
956 // declarations have to be carefully written to work for friend
957 // objects, with the most important detail being that the target
958 // decl should almost certainly not be placed in Owner.
959 Decl *NewND = Visit(ND);
960 if (!NewND) return nullptr;
961
962 FriendDecl *FD =
963 FriendDecl::Create(SemaRef.Context, Owner, D->getLocation(),
964 cast<NamedDecl>(NewND), D->getFriendLoc());
965 FD->setAccess(AS_public);
966 FD->setUnsupportedFriend(D->isUnsupportedFriend());
967 Owner->addDecl(FD);
968 return FD;
969}
970
971Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) {
972 Expr *AssertExpr = D->getAssertExpr();
973
974 // The expression in a static assertion is a constant expression.
975 EnterExpressionEvaluationContext Unevaluated(
976 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
977
978 ExprResult InstantiatedAssertExpr
979 = SemaRef.SubstExpr(AssertExpr, TemplateArgs);
980 if (InstantiatedAssertExpr.isInvalid())
981 return nullptr;
982
983 return SemaRef.BuildStaticAssertDeclaration(D->getLocation(),
984 InstantiatedAssertExpr.get(),
985 D->getMessage(),
986 D->getRParenLoc(),
987 D->isFailed());
988}
989
990Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) {
991 EnumDecl *PrevDecl = nullptr;
992 if (EnumDecl *PatternPrev = getPreviousDeclForInstantiation(D)) {
993 NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
994 PatternPrev,
995 TemplateArgs);
996 if (!Prev) return nullptr;
997 PrevDecl = cast<EnumDecl>(Prev);
998 }
999
1000 EnumDecl *Enum = EnumDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
1001 D->getLocation(), D->getIdentifier(),
1002 PrevDecl, D->isScoped(),
1003 D->isScopedUsingClassTag(), D->isFixed());
1004 if (D->isFixed()) {
1005 if (TypeSourceInfo *TI = D->getIntegerTypeSourceInfo()) {
1006 // If we have type source information for the underlying type, it means it
1007 // has been explicitly set by the user. Perform substitution on it before
1008 // moving on.
1009 SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
1010 TypeSourceInfo *NewTI = SemaRef.SubstType(TI, TemplateArgs, UnderlyingLoc,
1011 DeclarationName());
1012 if (!NewTI || SemaRef.CheckEnumUnderlyingType(NewTI))
1013 Enum->setIntegerType(SemaRef.Context.IntTy);
1014 else
1015 Enum->setIntegerTypeSourceInfo(NewTI);
1016 } else {
1017 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1018, __PRETTY_FUNCTION__))
1018 && "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1018, __PRETTY_FUNCTION__))
;
1019 Enum->setIntegerType(D->getIntegerType());
1020 }
1021 }
1022
1023 SemaRef.InstantiateAttrs(TemplateArgs, D, Enum);
1024
1025 Enum->setInstantiationOfMemberEnum(D, TSK_ImplicitInstantiation);
1026 Enum->setAccess(D->getAccess());
1027 // Forward the mangling number from the template to the instantiated decl.
1028 SemaRef.Context.setManglingNumber(Enum, SemaRef.Context.getManglingNumber(D));
1029 // See if the old tag was defined along with a declarator.
1030 // If it did, mark the new tag as being associated with that declarator.
1031 if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D))
1032 SemaRef.Context.addDeclaratorForUnnamedTagDecl(Enum, DD);
1033 // See if the old tag was defined along with a typedef.
1034 // If it did, mark the new tag as being associated with that typedef.
1035 if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D))
1036 SemaRef.Context.addTypedefNameForUnnamedTagDecl(Enum, TND);
1037 if (SubstQualifier(D, Enum)) return nullptr;
1038 Owner->addDecl(Enum);
1039
1040 EnumDecl *Def = D->getDefinition();
1041 if (Def && Def != D) {
1042 // If this is an out-of-line definition of an enum member template, check
1043 // that the underlying types match in the instantiation of both
1044 // declarations.
1045 if (TypeSourceInfo *TI = Def->getIntegerTypeSourceInfo()) {
1046 SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
1047 QualType DefnUnderlying =
1048 SemaRef.SubstType(TI->getType(), TemplateArgs,
1049 UnderlyingLoc, DeclarationName());
1050 SemaRef.CheckEnumRedeclaration(Def->getLocation(), Def->isScoped(),
1051 DefnUnderlying,
1052 /*EnumUnderlyingIsImplicit=*/false, Enum);
1053 }
1054 }
1055
1056 // C++11 [temp.inst]p1: The implicit instantiation of a class template
1057 // specialization causes the implicit instantiation of the declarations, but
1058 // not the definitions of scoped member enumerations.
1059 //
1060 // DR1484 clarifies that enumeration definitions inside of a template
1061 // declaration aren't considered entities that can be separately instantiated
1062 // from the rest of the entity they are declared inside of.
1063 if (isDeclWithinFunction(D) ? D == Def : Def && !Enum->isScoped()) {
1064 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Enum);
1065 InstantiateEnumDefinition(Enum, Def);
1066 }
1067
1068 return Enum;
1069}
1070
1071void TemplateDeclInstantiator::InstantiateEnumDefinition(
1072 EnumDecl *Enum, EnumDecl *Pattern) {
1073 Enum->startDefinition();
1074
1075 // Update the location to refer to the definition.
1076 Enum->setLocation(Pattern->getLocation());
1077
1078 SmallVector<Decl*, 4> Enumerators;
1079
1080 EnumConstantDecl *LastEnumConst = nullptr;
1081 for (auto *EC : Pattern->enumerators()) {
1082 // The specified value for the enumerator.
1083 ExprResult Value((Expr *)nullptr);
1084 if (Expr *UninstValue = EC->getInitExpr()) {
1085 // The enumerator's value expression is a constant expression.
1086 EnterExpressionEvaluationContext Unevaluated(
1087 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
1088
1089 Value = SemaRef.SubstExpr(UninstValue, TemplateArgs);
1090 }
1091
1092 // Drop the initial value and continue.
1093 bool isInvalid = false;
1094 if (Value.isInvalid()) {
1095 Value = nullptr;
1096 isInvalid = true;
1097 }
1098
1099 EnumConstantDecl *EnumConst
1100 = SemaRef.CheckEnumConstant(Enum, LastEnumConst,
1101 EC->getLocation(), EC->getIdentifier(),
1102 Value.get());
1103
1104 if (isInvalid) {
1105 if (EnumConst)
1106 EnumConst->setInvalidDecl();
1107 Enum->setInvalidDecl();
1108 }
1109
1110 if (EnumConst) {
1111 SemaRef.InstantiateAttrs(TemplateArgs, EC, EnumConst);
1112
1113 EnumConst->setAccess(Enum->getAccess());
1114 Enum->addDecl(EnumConst);
1115 Enumerators.push_back(EnumConst);
1116 LastEnumConst = EnumConst;
1117
1118 if (Pattern->getDeclContext()->isFunctionOrMethod() &&
1119 !Enum->isScoped()) {
1120 // If the enumeration is within a function or method, record the enum
1121 // constant as a local.
1122 SemaRef.CurrentInstantiationScope->InstantiatedLocal(EC, EnumConst);
1123 }
1124 }
1125 }
1126
1127 SemaRef.ActOnEnumBody(Enum->getLocation(), Enum->getBraceRange(), Enum,
1128 Enumerators,
1129 nullptr, nullptr);
1130}
1131
1132Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) {
1133 llvm_unreachable("EnumConstantDecls can only occur within EnumDecls.")::llvm::llvm_unreachable_internal("EnumConstantDecls can only occur within EnumDecls."
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1133)
;
1134}
1135
1136Decl *
1137TemplateDeclInstantiator::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
1138 llvm_unreachable("BuiltinTemplateDecls cannot be instantiated.")::llvm::llvm_unreachable_internal("BuiltinTemplateDecls cannot be instantiated."
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1138)
;
1139}
1140
1141Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1142 bool isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1143
1144 // Create a local instantiation scope for this class template, which
1145 // will contain the instantiations of the template parameters.
1146 LocalInstantiationScope Scope(SemaRef);
1147 TemplateParameterList *TempParams = D->getTemplateParameters();
1148 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1149 if (!InstParams)
1150 return nullptr;
1151
1152 CXXRecordDecl *Pattern = D->getTemplatedDecl();
1153
1154 // Instantiate the qualifier. We have to do this first in case
1155 // we're a friend declaration, because if we are then we need to put
1156 // the new declaration in the appropriate context.
1157 NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc();
1158 if (QualifierLoc) {
1159 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1160 TemplateArgs);
1161 if (!QualifierLoc)
1162 return nullptr;
1163 }
1164
1165 CXXRecordDecl *PrevDecl = nullptr;
1166 ClassTemplateDecl *PrevClassTemplate = nullptr;
1167
1168 if (!isFriend && getPreviousDeclForInstantiation(Pattern)) {
1169 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
1170 if (!Found.empty()) {
1171 PrevClassTemplate = dyn_cast<ClassTemplateDecl>(Found.front());
1172 if (PrevClassTemplate)
1173 PrevDecl = PrevClassTemplate->getTemplatedDecl();
1174 }
1175 }
1176
1177 // If this isn't a friend, then it's a member template, in which
1178 // case we just want to build the instantiation in the
1179 // specialization. If it is a friend, we want to build it in
1180 // the appropriate context.
1181 DeclContext *DC = Owner;
1182 if (isFriend) {
1183 if (QualifierLoc) {
1184 CXXScopeSpec SS;
1185 SS.Adopt(QualifierLoc);
1186 DC = SemaRef.computeDeclContext(SS);
1187 if (!DC) return nullptr;
1188 } else {
1189 DC = SemaRef.FindInstantiatedContext(Pattern->getLocation(),
1190 Pattern->getDeclContext(),
1191 TemplateArgs);
1192 }
1193
1194 // Look for a previous declaration of the template in the owning
1195 // context.
1196 LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(),
1197 Sema::LookupOrdinaryName, Sema::ForRedeclaration);
1198 SemaRef.LookupQualifiedName(R, DC);
1199
1200 if (R.isSingleResult()) {
1201 PrevClassTemplate = R.getAsSingle<ClassTemplateDecl>();
1202 if (PrevClassTemplate)
1203 PrevDecl = PrevClassTemplate->getTemplatedDecl();
1204 }
1205
1206 if (!PrevClassTemplate && QualifierLoc) {
1207 SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope)
1208 << D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC
1209 << QualifierLoc.getSourceRange();
1210 return nullptr;
1211 }
1212
1213 bool AdoptedPreviousTemplateParams = false;
1214 if (PrevClassTemplate) {
1215 bool Complain = true;
1216
1217 // HACK: libstdc++ 4.2.1 contains an ill-formed friend class
1218 // template for struct std::tr1::__detail::_Map_base, where the
1219 // template parameters of the friend declaration don't match the
1220 // template parameters of the original declaration. In this one
1221 // case, we don't complain about the ill-formed friend
1222 // declaration.
1223 if (isFriend && Pattern->getIdentifier() &&
1224 Pattern->getIdentifier()->isStr("_Map_base") &&
1225 DC->isNamespace() &&
1226 cast<NamespaceDecl>(DC)->getIdentifier() &&
1227 cast<NamespaceDecl>(DC)->getIdentifier()->isStr("__detail")) {
1228 DeclContext *DCParent = DC->getParent();
1229 if (DCParent->isNamespace() &&
1230 cast<NamespaceDecl>(DCParent)->getIdentifier() &&
1231 cast<NamespaceDecl>(DCParent)->getIdentifier()->isStr("tr1")) {
1232 if (cast<Decl>(DCParent)->isInStdNamespace())
1233 Complain = false;
1234 }
1235 }
1236
1237 TemplateParameterList *PrevParams
1238 = PrevClassTemplate->getTemplateParameters();
1239
1240 // Make sure the parameter lists match.
1241 if (!SemaRef.TemplateParameterListsAreEqual(InstParams, PrevParams,
1242 Complain,
1243 Sema::TPL_TemplateMatch)) {
1244 if (Complain)
1245 return nullptr;
1246
1247 AdoptedPreviousTemplateParams = true;
1248 InstParams = PrevParams;
1249 }
1250
1251 // Do some additional validation, then merge default arguments
1252 // from the existing declarations.
1253 if (!AdoptedPreviousTemplateParams &&
1254 SemaRef.CheckTemplateParameterList(InstParams, PrevParams,
1255 Sema::TPC_ClassTemplate))
1256 return nullptr;
1257 }
1258 }
1259
1260 CXXRecordDecl *RecordInst
1261 = CXXRecordDecl::Create(SemaRef.Context, Pattern->getTagKind(), DC,
1262 Pattern->getLocStart(), Pattern->getLocation(),
1263 Pattern->getIdentifier(), PrevDecl,
1264 /*DelayTypeCreation=*/true);
1265
1266 if (QualifierLoc)
1267 RecordInst->setQualifierInfo(QualifierLoc);
1268
1269 ClassTemplateDecl *Inst
1270 = ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(),
1271 D->getIdentifier(), InstParams, RecordInst);
1272 assert(!(isFriend && Owner->isDependentContext()))((!(isFriend && Owner->isDependentContext())) ? static_cast
<void> (0) : __assert_fail ("!(isFriend && Owner->isDependentContext())"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1272, __PRETTY_FUNCTION__))
;
1273 Inst->setPreviousDecl(PrevClassTemplate);
1274
1275 RecordInst->setDescribedClassTemplate(Inst);
1276
1277 if (isFriend) {
1278 if (PrevClassTemplate)
1279 Inst->setAccess(PrevClassTemplate->getAccess());
1280 else
1281 Inst->setAccess(D->getAccess());
1282
1283 Inst->setObjectOfFriendDecl();
1284 // TODO: do we want to track the instantiation progeny of this
1285 // friend target decl?
1286 } else {
1287 Inst->setAccess(D->getAccess());
1288 if (!PrevClassTemplate)
1289 Inst->setInstantiatedFromMemberTemplate(D);
1290 }
1291
1292 // Trigger creation of the type for the instantiation.
1293 SemaRef.Context.getInjectedClassNameType(RecordInst,
1294 Inst->getInjectedClassNameSpecialization());
1295
1296 // Finish handling of friends.
1297 if (isFriend) {
1298 DC->makeDeclVisibleInContext(Inst);
1299 Inst->setLexicalDeclContext(Owner);
1300 RecordInst->setLexicalDeclContext(Owner);
1301 return Inst;
1302 }
1303
1304 if (D->isOutOfLine()) {
1305 Inst->setLexicalDeclContext(D->getLexicalDeclContext());
1306 RecordInst->setLexicalDeclContext(D->getLexicalDeclContext());
1307 }
1308
1309 Owner->addDecl(Inst);
1310
1311 if (!PrevClassTemplate) {
1312 // Queue up any out-of-line partial specializations of this member
1313 // class template; the client will force their instantiation once
1314 // the enclosing class has been instantiated.
1315 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
1316 D->getPartialSpecializations(PartialSpecs);
1317 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
1318 if (PartialSpecs[I]->getFirstDecl()->isOutOfLine())
1319 OutOfLinePartialSpecs.push_back(std::make_pair(Inst, PartialSpecs[I]));
1320 }
1321
1322 return Inst;
1323}
1324
1325Decl *
1326TemplateDeclInstantiator::VisitClassTemplatePartialSpecializationDecl(
1327 ClassTemplatePartialSpecializationDecl *D) {
1328 ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate();
1329
1330 // Lookup the already-instantiated declaration in the instantiation
1331 // of the class template and return that.
1332 DeclContext::lookup_result Found
1333 = Owner->lookup(ClassTemplate->getDeclName());
1334 if (Found.empty())
1335 return nullptr;
1336
1337 ClassTemplateDecl *InstClassTemplate
1338 = dyn_cast<ClassTemplateDecl>(Found.front());
1339 if (!InstClassTemplate)
1340 return nullptr;
1341
1342 if (ClassTemplatePartialSpecializationDecl *Result
1343 = InstClassTemplate->findPartialSpecInstantiatedFromMember(D))
1344 return Result;
1345
1346 return InstantiateClassTemplatePartialSpecialization(InstClassTemplate, D);
1347}
1348
1349Decl *TemplateDeclInstantiator::VisitVarTemplateDecl(VarTemplateDecl *D) {
1350 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.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1351, __PRETTY_FUNCTION__))
1351 "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.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1351, __PRETTY_FUNCTION__))
;
1352
1353 // Create a local instantiation scope for this variable template, which
1354 // will contain the instantiations of the template parameters.
1355 LocalInstantiationScope Scope(SemaRef);
1356 TemplateParameterList *TempParams = D->getTemplateParameters();
1357 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1358 if (!InstParams)
1359 return nullptr;
1360
1361 VarDecl *Pattern = D->getTemplatedDecl();
1362 VarTemplateDecl *PrevVarTemplate = nullptr;
1363
1364 if (getPreviousDeclForInstantiation(Pattern)) {
1365 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
1366 if (!Found.empty())
1367 PrevVarTemplate = dyn_cast<VarTemplateDecl>(Found.front());
1368 }
1369
1370 VarDecl *VarInst =
1371 cast_or_null<VarDecl>(VisitVarDecl(Pattern,
1372 /*InstantiatingVarTemplate=*/true));
1373 if (!VarInst) return nullptr;
1374
1375 DeclContext *DC = Owner;
1376
1377 VarTemplateDecl *Inst = VarTemplateDecl::Create(
1378 SemaRef.Context, DC, D->getLocation(), D->getIdentifier(), InstParams,
1379 VarInst);
1380 VarInst->setDescribedVarTemplate(Inst);
1381 Inst->setPreviousDecl(PrevVarTemplate);
1382
1383 Inst->setAccess(D->getAccess());
1384 if (!PrevVarTemplate)
1385 Inst->setInstantiatedFromMemberTemplate(D);
1386
1387 if (D->isOutOfLine()) {
1388 Inst->setLexicalDeclContext(D->getLexicalDeclContext());
1389 VarInst->setLexicalDeclContext(D->getLexicalDeclContext());
1390 }
1391
1392 Owner->addDecl(Inst);
1393
1394 if (!PrevVarTemplate) {
1395 // Queue up any out-of-line partial specializations of this member
1396 // variable template; the client will force their instantiation once
1397 // the enclosing class has been instantiated.
1398 SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs;
1399 D->getPartialSpecializations(PartialSpecs);
1400 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
1401 if (PartialSpecs[I]->getFirstDecl()->isOutOfLine())
1402 OutOfLineVarPartialSpecs.push_back(
1403 std::make_pair(Inst, PartialSpecs[I]));
1404 }
1405
1406 return Inst;
1407}
1408
1409Decl *TemplateDeclInstantiator::VisitVarTemplatePartialSpecializationDecl(
1410 VarTemplatePartialSpecializationDecl *D) {
1411 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.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1412, __PRETTY_FUNCTION__))
1412 "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.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1412, __PRETTY_FUNCTION__))
;
1413
1414 VarTemplateDecl *VarTemplate = D->getSpecializedTemplate();
1415
1416 // Lookup the already-instantiated declaration and return that.
1417 DeclContext::lookup_result Found = Owner->lookup(VarTemplate->getDeclName());
1418 assert(!Found.empty() && "Instantiation found nothing?")((!Found.empty() && "Instantiation found nothing?") ?
static_cast<void> (0) : __assert_fail ("!Found.empty() && \"Instantiation found nothing?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1418, __PRETTY_FUNCTION__))
;
1419
1420 VarTemplateDecl *InstVarTemplate = dyn_cast<VarTemplateDecl>(Found.front());
1421 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1421, __PRETTY_FUNCTION__))
;
1422
1423 if (VarTemplatePartialSpecializationDecl *Result =
1424 InstVarTemplate->findPartialSpecInstantiatedFromMember(D))
1425 return Result;
1426
1427 return InstantiateVarTemplatePartialSpecialization(InstVarTemplate, D);
1428}
1429
1430Decl *
1431TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1432 // Create a local instantiation scope for this function template, which
1433 // will contain the instantiations of the template parameters and then get
1434 // merged with the local instantiation scope for the function template
1435 // itself.
1436 LocalInstantiationScope Scope(SemaRef);
1437
1438 TemplateParameterList *TempParams = D->getTemplateParameters();
1439 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1440 if (!InstParams)
1441 return nullptr;
1442
1443 FunctionDecl *Instantiated = nullptr;
1444 if (CXXMethodDecl *DMethod = dyn_cast<CXXMethodDecl>(D->getTemplatedDecl()))
1445 Instantiated = cast_or_null<FunctionDecl>(VisitCXXMethodDecl(DMethod,
1446 InstParams));
1447 else
1448 Instantiated = cast_or_null<FunctionDecl>(VisitFunctionDecl(
1449 D->getTemplatedDecl(),
1450 InstParams));
1451
1452 if (!Instantiated)
1453 return nullptr;
1454
1455 // Link the instantiated function template declaration to the function
1456 // template from which it was instantiated.
1457 FunctionTemplateDecl *InstTemplate
1458 = Instantiated->getDescribedFunctionTemplate();
1459 InstTemplate->setAccess(D->getAccess());
1460 assert(InstTemplate &&((InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!"
) ? static_cast<void> (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1461, __PRETTY_FUNCTION__))
1461 "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!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1461, __PRETTY_FUNCTION__))
;
1462
1463 bool isFriend = (InstTemplate->getFriendObjectKind() != Decl::FOK_None);
1464
1465 // Link the instantiation back to the pattern *unless* this is a
1466 // non-definition friend declaration.
1467 if (!InstTemplate->getInstantiatedFromMemberTemplate() &&
1468 !(isFriend && !D->getTemplatedDecl()->isThisDeclarationADefinition()))
1469 InstTemplate->setInstantiatedFromMemberTemplate(D);
1470
1471 // Make declarations visible in the appropriate context.
1472 if (!isFriend) {
1473 Owner->addDecl(InstTemplate);
1474 } else if (InstTemplate->getDeclContext()->isRecord() &&
1475 !getPreviousDeclForInstantiation(D)) {
1476 SemaRef.CheckFriendAccess(InstTemplate);
1477 }
1478
1479 return InstTemplate;
1480}
1481
1482Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) {
1483 CXXRecordDecl *PrevDecl = nullptr;
1484 if (D->isInjectedClassName())
1485 PrevDecl = cast<CXXRecordDecl>(Owner);
1486 else if (CXXRecordDecl *PatternPrev = getPreviousDeclForInstantiation(D)) {
1487 NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
1488 PatternPrev,
1489 TemplateArgs);
1490 if (!Prev) return nullptr;
1491 PrevDecl = cast<CXXRecordDecl>(Prev);
1492 }
1493
1494 CXXRecordDecl *Record
1495 = CXXRecordDecl::Create(SemaRef.Context, D->getTagKind(), Owner,
1496 D->getLocStart(), D->getLocation(),
1497 D->getIdentifier(), PrevDecl);
1498
1499 // Substitute the nested name specifier, if any.
1500 if (SubstQualifier(D, Record))
1501 return nullptr;
1502
1503 Record->setImplicit(D->isImplicit());
1504 // FIXME: Check against AS_none is an ugly hack to work around the issue that
1505 // the tag decls introduced by friend class declarations don't have an access
1506 // specifier. Remove once this area of the code gets sorted out.
1507 if (D->getAccess() != AS_none)
1508 Record->setAccess(D->getAccess());
1509 if (!D->isInjectedClassName())
1510 Record->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
1511
1512 // If the original function was part of a friend declaration,
1513 // inherit its namespace state.
1514 if (D->getFriendObjectKind())
1515 Record->setObjectOfFriendDecl();
1516
1517 // Make sure that anonymous structs and unions are recorded.
1518 if (D->isAnonymousStructOrUnion())
1519 Record->setAnonymousStructOrUnion(true);
1520
1521 if (D->isLocalClass())
1522 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Record);
1523
1524 // Forward the mangling number from the template to the instantiated decl.
1525 SemaRef.Context.setManglingNumber(Record,
1526 SemaRef.Context.getManglingNumber(D));
1527
1528 // See if the old tag was defined along with a declarator.
1529 // If it did, mark the new tag as being associated with that declarator.
1530 if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D))
1531 SemaRef.Context.addDeclaratorForUnnamedTagDecl(Record, DD);
1532
1533 // See if the old tag was defined along with a typedef.
1534 // If it did, mark the new tag as being associated with that typedef.
1535 if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D))
1536 SemaRef.Context.addTypedefNameForUnnamedTagDecl(Record, TND);
1537
1538 Owner->addDecl(Record);
1539
1540 // DR1484 clarifies that the members of a local class are instantiated as part
1541 // of the instantiation of their enclosing entity.
1542 if (D->isCompleteDefinition() && D->isLocalClass()) {
1543 Sema::SavePendingLocalImplicitInstantiationsRAII
1544 SavedPendingLocalImplicitInstantiations(SemaRef);
1545
1546 SemaRef.InstantiateClass(D->getLocation(), Record, D, TemplateArgs,
1547 TSK_ImplicitInstantiation,
1548 /*Complain=*/true);
1549
1550 // For nested local classes, we will instantiate the members when we
1551 // reach the end of the outermost (non-nested) local class.
1552 if (!D->isCXXClassMember())
1553 SemaRef.InstantiateClassMembers(D->getLocation(), Record, TemplateArgs,
1554 TSK_ImplicitInstantiation);
1555
1556 // This class may have local implicit instantiations that need to be
1557 // performed within this scope.
1558 SemaRef.PerformPendingInstantiations(/*LocalOnly=*/true);
1559 }
1560
1561 SemaRef.DiagnoseUnusedNestedTypedefs(Record);
1562
1563 return Record;
1564}
1565
1566/// \brief Adjust the given function type for an instantiation of the
1567/// given declaration, to cope with modifications to the function's type that
1568/// aren't reflected in the type-source information.
1569///
1570/// \param D The declaration we're instantiating.
1571/// \param TInfo The already-instantiated type.
1572static QualType adjustFunctionTypeForInstantiation(ASTContext &Context,
1573 FunctionDecl *D,
1574 TypeSourceInfo *TInfo) {
1575 const FunctionProtoType *OrigFunc
1576 = D->getType()->castAs<FunctionProtoType>();
1577 const FunctionProtoType *NewFunc
1578 = TInfo->getType()->castAs<FunctionProtoType>();
1579 if (OrigFunc->getExtInfo() == NewFunc->getExtInfo())
1580 return TInfo->getType();
1581
1582 FunctionProtoType::ExtProtoInfo NewEPI = NewFunc->getExtProtoInfo();
1583 NewEPI.ExtInfo = OrigFunc->getExtInfo();
1584 return Context.getFunctionType(NewFunc->getReturnType(),
1585 NewFunc->getParamTypes(), NewEPI);
1586}
1587
1588/// Normal class members are of more specific types and therefore
1589/// don't make it here. This function serves two purposes:
1590/// 1) instantiating function templates
1591/// 2) substituting friend declarations
1592Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
1593 TemplateParameterList *TemplateParams) {
1594 // Check whether there is already a function template specialization for
1595 // this declaration.
1596 FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
1597 if (FunctionTemplate && !TemplateParams) {
1598 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1599
1600 void *InsertPos = nullptr;
1601 FunctionDecl *SpecFunc
1602 = FunctionTemplate->findSpecialization(Innermost, InsertPos);
1603
1604 // If we already have a function template specialization, return it.
1605 if (SpecFunc)
1606 return SpecFunc;
1607 }
1608
1609 bool isFriend;
1610 if (FunctionTemplate)
1611 isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
1612 else
1613 isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1614
1615 bool MergeWithParentScope = (TemplateParams != nullptr) ||
1616 Owner->isFunctionOrMethod() ||
1617 !(isa<Decl>(Owner) &&
1618 cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
1619 LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
1620
1621 SmallVector<ParmVarDecl *, 4> Params;
1622 TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
1623 if (!TInfo)
1624 return nullptr;
1625 QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
1626
1627 NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
1628 if (QualifierLoc) {
1629 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1630 TemplateArgs);
1631 if (!QualifierLoc)
1632 return nullptr;
1633 }
1634
1635 // If we're instantiating a local function declaration, put the result
1636 // in the enclosing namespace; otherwise we need to find the instantiated
1637 // context.
1638 DeclContext *DC;
1639 if (D->isLocalExternDecl()) {
1640 DC = Owner;
1641 SemaRef.adjustContextForLocalExternDecl(DC);
1642 } else if (isFriend && QualifierLoc) {
1643 CXXScopeSpec SS;
1644 SS.Adopt(QualifierLoc);
1645 DC = SemaRef.computeDeclContext(SS);
1646 if (!DC) return nullptr;
1647 } else {
1648 DC = SemaRef.FindInstantiatedContext(D->getLocation(), D->getDeclContext(),
1649 TemplateArgs);
1650 }
1651
1652 FunctionDecl *Function;
1653 if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D))
1654 Function = CXXDeductionGuideDecl::Create(
1655 SemaRef.Context, DC, D->getInnerLocStart(), DGuide->isExplicit(),
1656 D->getNameInfo(), T, TInfo, D->getSourceRange().getEnd());
1657 else {
1658 Function = FunctionDecl::Create(
1659 SemaRef.Context, DC, D->getInnerLocStart(), D->getNameInfo(), T, TInfo,
1660 D->getCanonicalDecl()->getStorageClass(), D->isInlineSpecified(),
1661 D->hasWrittenPrototype(), D->isConstexpr());
1662 Function->setRangeEnd(D->getSourceRange().getEnd());
1663 }
1664
1665 if (D->isInlined())
1666 Function->setImplicitlyInline();
1667
1668 if (QualifierLoc)
1669 Function->setQualifierInfo(QualifierLoc);
1670
1671 if (D->isLocalExternDecl())
1672 Function->setLocalExternDecl();
1673
1674 DeclContext *LexicalDC = Owner;
1675 if (!isFriend && D->isOutOfLine() && !D->isLocalExternDecl()) {
1676 assert(D->getDeclContext()->isFileContext())((D->getDeclContext()->isFileContext()) ? static_cast<
void> (0) : __assert_fail ("D->getDeclContext()->isFileContext()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1676, __PRETTY_FUNCTION__))
;
1677 LexicalDC = D->getDeclContext();
1678 }
1679
1680 Function->setLexicalDeclContext(LexicalDC);
1681
1682 // Attach the parameters
1683 for (unsigned P = 0; P < Params.size(); ++P)
1684 if (Params[P])
1685 Params[P]->setOwningFunction(Function);
1686 Function->setParams(Params);
1687
1688 SourceLocation InstantiateAtPOI;
1689 if (TemplateParams) {
1690 // Our resulting instantiation is actually a function template, since we
1691 // are substituting only the outer template parameters. For example, given
1692 //
1693 // template<typename T>
1694 // struct X {
1695 // template<typename U> friend void f(T, U);
1696 // };
1697 //
1698 // X<int> x;
1699 //
1700 // We are instantiating the friend function template "f" within X<int>,
1701 // which means substituting int for T, but leaving "f" as a friend function
1702 // template.
1703 // Build the function template itself.
1704 FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, DC,
1705 Function->getLocation(),
1706 Function->getDeclName(),
1707 TemplateParams, Function);
1708 Function->setDescribedFunctionTemplate(FunctionTemplate);
1709
1710 FunctionTemplate->setLexicalDeclContext(LexicalDC);
1711
1712 if (isFriend && D->isThisDeclarationADefinition()) {
1713 FunctionTemplate->setInstantiatedFromMemberTemplate(
1714 D->getDescribedFunctionTemplate());
1715 }
1716 } else if (FunctionTemplate) {
1717 // Record this function template specialization.
1718 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1719 Function->setFunctionTemplateSpecialization(FunctionTemplate,
1720 TemplateArgumentList::CreateCopy(SemaRef.Context,
1721 Innermost),
1722 /*InsertPos=*/nullptr);
1723 } else if (isFriend && D->isThisDeclarationADefinition()) {
1724 // Do not connect the friend to the template unless it's actually a
1725 // definition. We don't want non-template functions to be marked as being
1726 // template instantiations.
1727 Function->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
1728 }
1729
1730 if (InitFunctionInstantiation(Function, D))
1731 Function->setInvalidDecl();
1732
1733 bool isExplicitSpecialization = false;
1734
1735 LookupResult Previous(
1736 SemaRef, Function->getDeclName(), SourceLocation(),
1737 D->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage
1738 : Sema::LookupOrdinaryName,
1739 Sema::ForRedeclaration);
1740
1741 if (DependentFunctionTemplateSpecializationInfo *Info
1742 = D->getDependentSpecializationInfo()) {
1743 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1743, __PRETTY_FUNCTION__))
;
1744
1745 // This needs to be set now for future sanity.
1746 Function->setObjectOfFriendDecl();
1747
1748 // Instantiate the explicit template arguments.
1749 TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(),
1750 Info->getRAngleLoc());
1751 if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(),
1752 ExplicitArgs, TemplateArgs))
1753 return nullptr;
1754
1755 // Map the candidate templates to their instantiations.
1756 for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) {
1757 Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(),
1758 Info->getTemplate(I),
1759 TemplateArgs);
1760 if (!Temp) return nullptr;
1761
1762 Previous.addDecl(cast<FunctionTemplateDecl>(Temp));
1763 }
1764
1765 if (SemaRef.CheckFunctionTemplateSpecialization(Function,
1766 &ExplicitArgs,
1767 Previous))
1768 Function->setInvalidDecl();
1769
1770 isExplicitSpecialization = true;
1771
1772 } else if (TemplateParams || !FunctionTemplate) {
1773 // Look only into the namespace where the friend would be declared to
1774 // find a previous declaration. This is the innermost enclosing namespace,
1775 // as described in ActOnFriendFunctionDecl.
1776 SemaRef.LookupQualifiedName(Previous, DC);
1777
1778 // In C++, the previous declaration we find might be a tag type
1779 // (class or enum). In this case, the new declaration will hide the
1780 // tag type. Note that this does does not apply if we're declaring a
1781 // typedef (C++ [dcl.typedef]p4).
1782 if (Previous.isSingleTagDecl())
1783 Previous.clear();
1784 }
1785
1786 SemaRef.CheckFunctionDeclaration(/*Scope*/ nullptr, Function, Previous,
1787 isExplicitSpecialization);
1788
1789 NamedDecl *PrincipalDecl = (TemplateParams
1790 ? cast<NamedDecl>(FunctionTemplate)
1791 : Function);
1792
1793 // If the original function was part of a friend declaration,
1794 // inherit its namespace state and add it to the owner.
1795 if (isFriend) {
1796 PrincipalDecl->setObjectOfFriendDecl();
1797 DC->makeDeclVisibleInContext(PrincipalDecl);
1798
1799 bool QueuedInstantiation = false;
1800
1801 // C++11 [temp.friend]p4 (DR329):
1802 // When a function is defined in a friend function declaration in a class
1803 // template, the function is instantiated when the function is odr-used.
1804 // The same restrictions on multiple declarations and definitions that
1805 // apply to non-template function declarations and definitions also apply
1806 // to these implicit definitions.
1807 if (D->isThisDeclarationADefinition()) {
1808 // Check for a function body.
1809 const FunctionDecl *Definition = nullptr;
1810 if (Function->isDefined(Definition) &&
1811 Definition->getTemplateSpecializationKind() == TSK_Undeclared) {
1812 SemaRef.Diag(Function->getLocation(), diag::err_redefinition)
1813 << Function->getDeclName();
1814 SemaRef.Diag(Definition->getLocation(), diag::note_previous_definition);
1815 }
1816 // Check for redefinitions due to other instantiations of this or
1817 // a similar friend function.
1818 else for (auto R : Function->redecls()) {
1819 if (R == Function)
1820 continue;
1821
1822 // If some prior declaration of this function has been used, we need
1823 // to instantiate its definition.
1824 if (!QueuedInstantiation && R->isUsed(false)) {
1825 if (MemberSpecializationInfo *MSInfo =
1826 Function->getMemberSpecializationInfo()) {
1827 if (MSInfo->getPointOfInstantiation().isInvalid()) {
1828 SourceLocation Loc = R->getLocation(); // FIXME
1829 MSInfo->setPointOfInstantiation(Loc);
1830 SemaRef.PendingLocalImplicitInstantiations.push_back(
1831 std::make_pair(Function, Loc));
1832 QueuedInstantiation = true;
1833 }
1834 }
1835 }
1836
1837 // If some prior declaration of this function was a friend with an
1838 // uninstantiated definition, reject it.
1839 if (R->getFriendObjectKind()) {
1840 if (const FunctionDecl *RPattern =
1841 R->getTemplateInstantiationPattern()) {
1842 if (RPattern->isDefined(RPattern)) {
1843 SemaRef.Diag(Function->getLocation(), diag::err_redefinition)
1844 << Function->getDeclName();
1845 SemaRef.Diag(R->getLocation(), diag::note_previous_definition);
1846 break;
1847 }
1848 }
1849 }
1850 }
1851 }
1852 }
1853
1854 if (Function->isLocalExternDecl() && !Function->getPreviousDecl())
1855 DC->makeDeclVisibleInContext(PrincipalDecl);
1856
1857 if (Function->isOverloadedOperator() && !DC->isRecord() &&
1858 PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary))
1859 PrincipalDecl->setNonMemberOperator();
1860
1861 assert(!D->isDefaulted() && "only methods should be defaulted")((!D->isDefaulted() && "only methods should be defaulted"
) ? static_cast<void> (0) : __assert_fail ("!D->isDefaulted() && \"only methods should be defaulted\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1861, __PRETTY_FUNCTION__))
;
1862 return Function;
1863}
1864
1865Decl *
1866TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
1867 TemplateParameterList *TemplateParams,
1868 bool IsClassScopeSpecialization) {
1869 FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
1870 if (FunctionTemplate && !TemplateParams) {
1871 // We are creating a function template specialization from a function
1872 // template. Check whether there is already a function template
1873 // specialization for this particular set of template arguments.
1874 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1875
1876 void *InsertPos = nullptr;
1877 FunctionDecl *SpecFunc
1878 = FunctionTemplate->findSpecialization(Innermost, InsertPos);
1879
1880 // If we already have a function template specialization, return it.
1881 if (SpecFunc)
1882 return SpecFunc;
1883 }
1884
1885 bool isFriend;
1886 if (FunctionTemplate)
1887 isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
1888 else
1889 isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1890
1891 bool MergeWithParentScope = (TemplateParams != nullptr) ||
1892 !(isa<Decl>(Owner) &&
1893 cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
1894 LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
1895
1896 // Instantiate enclosing template arguments for friends.
1897 SmallVector<TemplateParameterList *, 4> TempParamLists;
1898 unsigned NumTempParamLists = 0;
1899 if (isFriend && (NumTempParamLists = D->getNumTemplateParameterLists())) {
1900 TempParamLists.resize(NumTempParamLists);
1901 for (unsigned I = 0; I != NumTempParamLists; ++I) {
1902 TemplateParameterList *TempParams = D->getTemplateParameterList(I);
1903 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1904 if (!InstParams)
1905 return nullptr;
1906 TempParamLists[I] = InstParams;
1907 }
1908 }
1909
1910 SmallVector<ParmVarDecl *, 4> Params;
1911 TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
1912 if (!TInfo)
1913 return nullptr;
1914 QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
1915
1916 NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
1917 if (QualifierLoc) {
1918 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1919 TemplateArgs);
1920 if (!QualifierLoc)
1921 return nullptr;
1922 }
1923
1924 DeclContext *DC = Owner;
1925 if (isFriend) {
1926 if (QualifierLoc) {
1927 CXXScopeSpec SS;
1928 SS.Adopt(QualifierLoc);
1929 DC = SemaRef.computeDeclContext(SS);
1930
1931 if (DC && SemaRef.RequireCompleteDeclContext(SS, DC))
1932 return nullptr;
1933 } else {
1934 DC = SemaRef.FindInstantiatedContext(D->getLocation(),
1935 D->getDeclContext(),
1936 TemplateArgs);
1937 }
1938 if (!DC) return nullptr;
1939 }
1940
1941 // Build the instantiated method declaration.
1942 CXXRecordDecl *Record = cast<CXXRecordDecl>(DC);
1943 CXXMethodDecl *Method = nullptr;
1944
1945 SourceLocation StartLoc = D->getInnerLocStart();
1946 DeclarationNameInfo NameInfo
1947 = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
1948 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1949 Method = CXXConstructorDecl::Create(SemaRef.Context, Record,
1950 StartLoc, NameInfo, T, TInfo,
1951 Constructor->isExplicit(),
1952 Constructor->isInlineSpecified(),
1953 false, Constructor->isConstexpr());
1954 Method->setRangeEnd(Constructor->getLocEnd());
1955 } else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(D)) {
1956 Method = CXXDestructorDecl::Create(SemaRef.Context, Record,
1957 StartLoc, NameInfo, T, TInfo,
1958 Destructor->isInlineSpecified(),
1959 false);
1960 Method->setRangeEnd(Destructor->getLocEnd());
1961 } else if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
1962 Method = CXXConversionDecl::Create(SemaRef.Context, Record,
1963 StartLoc, NameInfo, T, TInfo,
1964 Conversion->isInlineSpecified(),
1965 Conversion->isExplicit(),
1966 Conversion->isConstexpr(),
1967 Conversion->getLocEnd());
1968 } else {
1969 StorageClass SC = D->isStatic() ? SC_Static : SC_None;
1970 Method = CXXMethodDecl::Create(SemaRef.Context, Record,
1971 StartLoc, NameInfo, T, TInfo,
1972 SC, D->isInlineSpecified(),
1973 D->isConstexpr(), D->getLocEnd());
1974 }
1975
1976 if (D->isInlined())
1977 Method->setImplicitlyInline();
1978
1979 if (QualifierLoc)
1980 Method->setQualifierInfo(QualifierLoc);
1981
1982 if (TemplateParams) {
1983 // Our resulting instantiation is actually a function template, since we
1984 // are substituting only the outer template parameters. For example, given
1985 //
1986 // template<typename T>
1987 // struct X {
1988 // template<typename U> void f(T, U);
1989 // };
1990 //
1991 // X<int> x;
1992 //
1993 // We are instantiating the member template "f" within X<int>, which means
1994 // substituting int for T, but leaving "f" as a member function template.
1995 // Build the function template itself.
1996 FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, Record,
1997 Method->getLocation(),
1998 Method->getDeclName(),
1999 TemplateParams, Method);
2000 if (isFriend) {
2001 FunctionTemplate->setLexicalDeclContext(Owner);
2002 FunctionTemplate->setObjectOfFriendDecl();
2003 } else if (D->isOutOfLine())
2004 FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext());
2005 Method->setDescribedFunctionTemplate(FunctionTemplate);
2006 } else if (FunctionTemplate) {
2007 // Record this function template specialization.
2008 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
2009 Method->setFunctionTemplateSpecialization(FunctionTemplate,
2010 TemplateArgumentList::CreateCopy(SemaRef.Context,
2011 Innermost),
2012 /*InsertPos=*/nullptr);
2013 } else if (!isFriend) {
2014 // Record that this is an instantiation of a member function.
2015 Method->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
2016 }
2017
2018 // If we are instantiating a member function defined
2019 // out-of-line, the instantiation will have the same lexical
2020 // context (which will be a namespace scope) as the template.
2021 if (isFriend) {
2022 if (NumTempParamLists)
2023 Method->setTemplateParameterListsInfo(
2024 SemaRef.Context,
2025 llvm::makeArrayRef(TempParamLists.data(), NumTempParamLists));
2026
2027 Method->setLexicalDeclContext(Owner);
2028 Method->setObjectOfFriendDecl();
2029 } else if (D->isOutOfLine())
2030 Method->setLexicalDeclContext(D->getLexicalDeclContext());
2031
2032 // Attach the parameters
2033 for (unsigned P = 0; P < Params.size(); ++P)
2034 Params[P]->setOwningFunction(Method);
2035 Method->setParams(Params);
2036
2037 if (InitMethodInstantiation(Method, D))
2038 Method->setInvalidDecl();
2039
2040 LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName,
2041 Sema::ForRedeclaration);
2042
2043 if (!FunctionTemplate || TemplateParams || isFriend) {
2044 SemaRef.LookupQualifiedName(Previous, Record);
2045
2046 // In C++, the previous declaration we find might be a tag type
2047 // (class or enum). In this case, the new declaration will hide the
2048 // tag type. Note that this does does not apply if we're declaring a
2049 // typedef (C++ [dcl.typedef]p4).
2050 if (Previous.isSingleTagDecl())
2051 Previous.clear();
2052 }
2053
2054 if (!IsClassScopeSpecialization)
2055 SemaRef.CheckFunctionDeclaration(nullptr, Method, Previous, false);
2056
2057 if (D->isPure())
2058 SemaRef.CheckPureMethod(Method, SourceRange());
2059
2060 // Propagate access. For a non-friend declaration, the access is
2061 // whatever we're propagating from. For a friend, it should be the
2062 // previous declaration we just found.
2063 if (isFriend && Method->getPreviousDecl())
2064 Method->setAccess(Method->getPreviousDecl()->getAccess());
2065 else
2066 Method->setAccess(D->getAccess());
2067 if (FunctionTemplate)
2068 FunctionTemplate->setAccess(Method->getAccess());
2069
2070 SemaRef.CheckOverrideControl(Method);
2071
2072 // If a function is defined as defaulted or deleted, mark it as such now.
2073 if (D->isExplicitlyDefaulted())
2074 SemaRef.SetDeclDefaulted(Method, Method->getLocation());
2075 if (D->isDeletedAsWritten())
2076 SemaRef.SetDeclDeleted(Method, Method->getLocation());
2077
2078 // If there's a function template, let our caller handle it.
2079 if (FunctionTemplate) {
2080 // do nothing
2081
2082 // Don't hide a (potentially) valid declaration with an invalid one.
2083 } else if (Method->isInvalidDecl() && !Previous.empty()) {
2084 // do nothing
2085
2086 // Otherwise, check access to friends and make them visible.
2087 } else if (isFriend) {
2088 // We only need to re-check access for methods which we didn't
2089 // manage to match during parsing.
2090 if (!D->getPreviousDecl())
2091 SemaRef.CheckFriendAccess(Method);
2092
2093 Record->makeDeclVisibleInContext(Method);
2094
2095 // Otherwise, add the declaration. We don't need to do this for
2096 // class-scope specializations because we'll have matched them with
2097 // the appropriate template.
2098 } else if (!IsClassScopeSpecialization) {
2099 Owner->addDecl(Method);
2100 }
2101
2102 return Method;
2103}
2104
2105Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
2106 return VisitCXXMethodDecl(D);
2107}
2108
2109Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
2110 return VisitCXXMethodDecl(D);
2111}
2112
2113Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) {
2114 return VisitCXXMethodDecl(D);
2115}
2116
2117Decl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) {
2118 return SemaRef.SubstParmVarDecl(D, TemplateArgs, /*indexAdjustment*/ 0, None,
2119 /*ExpectParameterPack=*/ false);
2120}
2121
2122Decl *TemplateDeclInstantiator::VisitTemplateTypeParmDecl(
2123 TemplateTypeParmDecl *D) {
2124 // TODO: don't always clone when decls are refcounted.
2125 assert(D->getTypeForDecl()->isTemplateTypeParmType())((D->getTypeForDecl()->isTemplateTypeParmType()) ? static_cast
<void> (0) : __assert_fail ("D->getTypeForDecl()->isTemplateTypeParmType()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2125, __PRETTY_FUNCTION__))
;
2126
2127 TemplateTypeParmDecl *Inst = TemplateTypeParmDecl::Create(
2128 SemaRef.Context, Owner, D->getLocStart(), D->getLocation(),
2129 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), D->getIndex(),
2130 D->getIdentifier(), D->wasDeclaredWithTypename(), D->isParameterPack());
2131 Inst->setAccess(AS_public);
2132
2133 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2134 TypeSourceInfo *InstantiatedDefaultArg =
2135 SemaRef.SubstType(D->getDefaultArgumentInfo(), TemplateArgs,
2136 D->getDefaultArgumentLoc(), D->getDeclName());
2137 if (InstantiatedDefaultArg)
2138 Inst->setDefaultArgument(InstantiatedDefaultArg);
2139 }
2140
2141 // Introduce this template parameter's instantiation into the instantiation
2142 // scope.
2143 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Inst);
2144
2145 return Inst;
2146}
2147
2148Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl(
2149 NonTypeTemplateParmDecl *D) {
2150 // Substitute into the type of the non-type template parameter.
2151 TypeLoc TL = D->getTypeSourceInfo()->getTypeLoc();
2152 SmallVector<TypeSourceInfo *, 4> ExpandedParameterPackTypesAsWritten;
2153 SmallVector<QualType, 4> ExpandedParameterPackTypes;
2154 bool IsExpandedParameterPack = false;
2155 TypeSourceInfo *DI;
2156 QualType T;
2157 bool Invalid = false;
2158
2159 if (D->isExpandedParameterPack()) {
2160 // The non-type template parameter pack is an already-expanded pack
2161 // expansion of types. Substitute into each of the expanded types.
2162 ExpandedParameterPackTypes.reserve(D->getNumExpansionTypes());
2163 ExpandedParameterPackTypesAsWritten.reserve(D->getNumExpansionTypes());
2164 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2165 TypeSourceInfo *NewDI =
2166 SemaRef.SubstType(D->getExpansionTypeSourceInfo(I), TemplateArgs,
2167 D->getLocation(), D->getDeclName());
2168 if (!NewDI)
2169 return nullptr;
2170
2171 QualType NewT =
2172 SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation());
2173 if (NewT.isNull())
2174 return nullptr;
2175
2176 ExpandedParameterPackTypesAsWritten.push_back(NewDI);
2177 ExpandedParameterPackTypes.push_back(NewT);
2178 }
2179
2180 IsExpandedParameterPack = true;
2181 DI = D->getTypeSourceInfo();
2182 T = DI->getType();
2183 } else if (D->isPackExpansion()) {
2184 // The non-type template parameter pack's type is a pack expansion of types.
2185 // Determine whether we need to expand this parameter pack into separate
2186 // types.
2187 PackExpansionTypeLoc Expansion = TL.castAs<PackExpansionTypeLoc>();
2188 TypeLoc Pattern = Expansion.getPatternLoc();
2189 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2190 SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded);
2191
2192 // Determine whether the set of unexpanded parameter packs can and should
2193 // be expanded.
2194 bool Expand = true;
2195 bool RetainExpansion = false;
2196 Optional<unsigned> OrigNumExpansions
2197 = Expansion.getTypePtr()->getNumExpansions();
2198 Optional<unsigned> NumExpansions = OrigNumExpansions;
2199 if (SemaRef.CheckParameterPacksForExpansion(Expansion.getEllipsisLoc(),
2200 Pattern.getSourceRange(),
2201 Unexpanded,
2202 TemplateArgs,
2203 Expand, RetainExpansion,
2204 NumExpansions))
2205 return nullptr;
2206
2207 if (Expand) {
2208 for (unsigned I = 0; I != *NumExpansions; ++I) {
2209 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2210 TypeSourceInfo *NewDI = SemaRef.SubstType(Pattern, TemplateArgs,
2211 D->getLocation(),
2212 D->getDeclName());
2213 if (!NewDI)
2214 return nullptr;
2215
2216 QualType NewT =
2217 SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation());
2218 if (NewT.isNull())
2219 return nullptr;
2220
2221 ExpandedParameterPackTypesAsWritten.push_back(NewDI);
2222 ExpandedParameterPackTypes.push_back(NewT);
2223 }
2224
2225 // Note that we have an expanded parameter pack. The "type" of this
2226 // expanded parameter pack is the original expansion type, but callers
2227 // will end up using the expanded parameter pack types for type-checking.
2228 IsExpandedParameterPack = true;
2229 DI = D->getTypeSourceInfo();
2230 T = DI->getType();
2231 } else {
2232 // We cannot fully expand the pack expansion now, so substitute into the
2233 // pattern and create a new pack expansion type.
2234 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2235 TypeSourceInfo *NewPattern = SemaRef.SubstType(Pattern, TemplateArgs,
2236 D->getLocation(),
2237 D->getDeclName());
2238 if (!NewPattern)
2239 return nullptr;
2240
2241 SemaRef.CheckNonTypeTemplateParameterType(NewPattern, D->getLocation());
2242 DI = SemaRef.CheckPackExpansion(NewPattern, Expansion.getEllipsisLoc(),
2243 NumExpansions);
2244 if (!DI)
2245 return nullptr;
2246
2247 T = DI->getType();
2248 }
2249 } else {
2250 // Simple case: substitution into a parameter that is not a parameter pack.
2251 DI = SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs,
2252 D->getLocation(), D->getDeclName());
2253 if (!DI)
2254 return nullptr;
2255
2256 // Check that this type is acceptable for a non-type template parameter.
2257 T = SemaRef.CheckNonTypeTemplateParameterType(DI, D->getLocation());
2258 if (T.isNull()) {
2259 T = SemaRef.Context.IntTy;
2260 Invalid = true;
2261 }
2262 }
2263
2264 NonTypeTemplateParmDecl *Param;
2265 if (IsExpandedParameterPack)
2266 Param = NonTypeTemplateParmDecl::Create(
2267 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
2268 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2269 D->getPosition(), D->getIdentifier(), T, DI, ExpandedParameterPackTypes,
2270 ExpandedParameterPackTypesAsWritten);
2271 else
2272 Param = NonTypeTemplateParmDecl::Create(
2273 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
2274 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2275 D->getPosition(), D->getIdentifier(), T, D->isParameterPack(), DI);
2276
2277 Param->setAccess(AS_public);
2278 if (Invalid)
2279 Param->setInvalidDecl();
2280
2281 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2282 EnterExpressionEvaluationContext ConstantEvaluated(
2283 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
2284 ExprResult Value = SemaRef.SubstExpr(D->getDefaultArgument(), TemplateArgs);
2285 if (!Value.isInvalid())
2286 Param->setDefaultArgument(Value.get());
2287 }
2288
2289 // Introduce this template parameter's instantiation into the instantiation
2290 // scope.
2291 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
2292 return Param;
2293}
2294
2295static void collectUnexpandedParameterPacks(
2296 Sema &S,
2297 TemplateParameterList *Params,
2298 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
2299 for (const auto &P : *Params) {
2300 if (P->isTemplateParameterPack())
2301 continue;
2302 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P))
2303 S.collectUnexpandedParameterPacks(NTTP->getTypeSourceInfo()->getTypeLoc(),
2304 Unexpanded);
2305 if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(P))
2306 collectUnexpandedParameterPacks(S, TTP->getTemplateParameters(),
2307 Unexpanded);
2308 }
2309}
2310
2311Decl *
2312TemplateDeclInstantiator::VisitTemplateTemplateParmDecl(
2313 TemplateTemplateParmDecl *D) {
2314 // Instantiate the template parameter list of the template template parameter.
2315 TemplateParameterList *TempParams = D->getTemplateParameters();
2316 TemplateParameterList *InstParams;
2317 SmallVector<TemplateParameterList*, 8> ExpandedParams;
2318
2319 bool IsExpandedParameterPack = false;
2320
2321 if (D->isExpandedParameterPack()) {
2322 // The template template parameter pack is an already-expanded pack
2323 // expansion of template parameters. Substitute into each of the expanded
2324 // parameters.
2325 ExpandedParams.reserve(D->getNumExpansionTemplateParameters());
2326 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2327 I != N; ++I) {
2328 LocalInstantiationScope Scope(SemaRef);
2329 TemplateParameterList *Expansion =
2330 SubstTemplateParams(D->getExpansionTemplateParameters(I));
2331 if (!Expansion)
2332 return nullptr;
2333 ExpandedParams.push_back(Expansion);
2334 }
2335
2336 IsExpandedParameterPack = true;
2337 InstParams = TempParams;
2338 } else if (D->isPackExpansion()) {
2339 // The template template parameter pack expands to a pack of template
2340 // template parameters. Determine whether we need to expand this parameter
2341 // pack into separate parameters.
2342 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2343 collectUnexpandedParameterPacks(SemaRef, D->getTemplateParameters(),
2344 Unexpanded);
2345
2346 // Determine whether the set of unexpanded parameter packs can and should
2347 // be expanded.
2348 bool Expand = true;
2349 bool RetainExpansion = false;
2350 Optional<unsigned> NumExpansions;
2351 if (SemaRef.CheckParameterPacksForExpansion(D->getLocation(),
2352 TempParams->getSourceRange(),
2353 Unexpanded,
2354 TemplateArgs,
2355 Expand, RetainExpansion,
2356 NumExpansions))
2357 return nullptr;
2358
2359 if (Expand) {
2360 for (unsigned I = 0; I != *NumExpansions; ++I) {
2361 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2362 LocalInstantiationScope Scope(SemaRef);
2363 TemplateParameterList *Expansion = SubstTemplateParams(TempParams);
2364 if (!Expansion)
2365 return nullptr;
2366 ExpandedParams.push_back(Expansion);
2367 }
2368
2369 // Note that we have an expanded parameter pack. The "type" of this
2370 // expanded parameter pack is the original expansion type, but callers
2371 // will end up using the expanded parameter pack types for type-checking.
2372 IsExpandedParameterPack = true;
2373 InstParams = TempParams;
2374 } else {
2375 // We cannot fully expand the pack expansion now, so just substitute
2376 // into the pattern.
2377 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2378
2379 LocalInstantiationScope Scope(SemaRef);
2380 InstParams = SubstTemplateParams(TempParams);
2381 if (!InstParams)
2382 return nullptr;
2383 }
2384 } else {
2385 // Perform the actual substitution of template parameters within a new,
2386 // local instantiation scope.
2387 LocalInstantiationScope Scope(SemaRef);
2388 InstParams = SubstTemplateParams(TempParams);
2389 if (!InstParams)
2390 return nullptr;
2391 }
2392
2393 // Build the template template parameter.
2394 TemplateTemplateParmDecl *Param;
2395 if (IsExpandedParameterPack)
2396 Param = TemplateTemplateParmDecl::Create(
2397 SemaRef.Context, Owner, D->getLocation(),
2398 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2399 D->getPosition(), D->getIdentifier(), InstParams, ExpandedParams);
2400 else
2401 Param = TemplateTemplateParmDecl::Create(
2402 SemaRef.Context, Owner, D->getLocation(),
2403 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2404 D->getPosition(), D->isParameterPack(), D->getIdentifier(), InstParams);
2405 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2406 NestedNameSpecifierLoc QualifierLoc =
2407 D->getDefaultArgument().getTemplateQualifierLoc();
2408 QualifierLoc =
2409 SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgs);
2410 TemplateName TName = SemaRef.SubstTemplateName(
2411 QualifierLoc, D->getDefaultArgument().getArgument().getAsTemplate(),
2412 D->getDefaultArgument().getTemplateNameLoc(), TemplateArgs);
2413 if (!TName.isNull())
2414 Param->setDefaultArgument(
2415 SemaRef.Context,
2416 TemplateArgumentLoc(TemplateArgument(TName),
2417 D->getDefaultArgument().getTemplateQualifierLoc(),
2418 D->getDefaultArgument().getTemplateNameLoc()));
2419 }
2420 Param->setAccess(AS_public);
2421
2422 // Introduce this template parameter's instantiation into the instantiation
2423 // scope.
2424 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
2425
2426 return Param;
2427}
2428
2429Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
2430 // Using directives are never dependent (and never contain any types or
2431 // expressions), so they require no explicit instantiation work.
2432
2433 UsingDirectiveDecl *Inst
2434 = UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(),
2435 D->getNamespaceKeyLocation(),
2436 D->getQualifierLoc(),
2437 D->getIdentLocation(),
2438 D->getNominatedNamespace(),
2439 D->getCommonAncestor());
2440
2441 // Add the using directive to its declaration context
2442 // only if this is not a function or method.
2443 if (!Owner->isFunctionOrMethod())
2444 Owner->addDecl(Inst);
2445
2446 return Inst;
2447}
2448
2449Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
2450
2451 // The nested name specifier may be dependent, for example
2452 // template <typename T> struct t {
2453 // struct s1 { T f1(); };
2454 // struct s2 : s1 { using s1::f1; };
2455 // };
2456 // template struct t<int>;
2457 // Here, in using s1::f1, s1 refers to t<T>::s1;
2458 // we need to substitute for t<int>::s1.
2459 NestedNameSpecifierLoc QualifierLoc
2460 = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
2461 TemplateArgs);
2462 if (!QualifierLoc)
2463 return nullptr;
2464
2465 // For an inheriting constructor declaration, the name of the using
2466 // declaration is the name of a constructor in this class, not in the
2467 // base class.
2468 DeclarationNameInfo NameInfo = D->getNameInfo();
2469 if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName)
2470 if (auto *RD = dyn_cast<CXXRecordDecl>(SemaRef.CurContext))
2471 NameInfo.setName(SemaRef.Context.DeclarationNames.getCXXConstructorName(
2472 SemaRef.Context.getCanonicalType(SemaRef.Context.getRecordType(RD))));
2473
2474 // We only need to do redeclaration lookups if we're in a class
2475 // scope (in fact, it's not really even possible in non-class
2476 // scopes).
2477 bool CheckRedeclaration = Owner->isRecord();
2478
2479 LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName,
2480 Sema::ForRedeclaration);
2481
2482 UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,
2483 D->getUsingLoc(),
2484 QualifierLoc,
2485 NameInfo,
2486 D->hasTypename());
2487
2488 CXXScopeSpec SS;
2489 SS.Adopt(QualifierLoc);
2490 if (CheckRedeclaration) {
2491 Prev.setHideTags(false);
2492 SemaRef.LookupQualifiedName(Prev, Owner);
2493
2494 // Check for invalid redeclarations.
2495 if (SemaRef.CheckUsingDeclRedeclaration(D->getUsingLoc(),
2496 D->hasTypename(), SS,
2497 D->getLocation(), Prev))
2498 NewUD->setInvalidDecl();
2499
2500 }
2501
2502 if (!NewUD->isInvalidDecl() &&
2503 SemaRef.CheckUsingDeclQualifier(D->getUsingLoc(), D->hasTypename(),
2504 SS, NameInfo, D->getLocation()))
2505 NewUD->setInvalidDecl();
2506
2507 SemaRef.Context.setInstantiatedFromUsingDecl(NewUD, D);
2508 NewUD->setAccess(D->getAccess());
2509 Owner->addDecl(NewUD);
2510
2511 // Don't process the shadow decls for an invalid decl.
2512 if (NewUD->isInvalidDecl())
2513 return NewUD;
2514
2515 if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName)
2516 SemaRef.CheckInheritingConstructorUsingDecl(NewUD);
2517
2518 bool isFunctionScope = Owner->isFunctionOrMethod();
2519
2520 // Process the shadow decls.
2521 for (auto *Shadow : D->shadows()) {
2522 // FIXME: UsingShadowDecl doesn't preserve its immediate target, so
2523 // reconstruct it in the case where it matters.
2524 NamedDecl *OldTarget = Shadow->getTargetDecl();
2525 if (auto *CUSD = dyn_cast<ConstructorUsingShadowDecl>(Shadow))
2526 if (auto *BaseShadow = CUSD->getNominatedBaseClassShadowDecl())
2527 OldTarget = BaseShadow;
2528
2529 NamedDecl *InstTarget =
2530 cast_or_null<NamedDecl>(SemaRef.FindInstantiatedDecl(
2531 Shadow->getLocation(), OldTarget, TemplateArgs));
2532 if (!InstTarget)
2533 return nullptr;
2534
2535 UsingShadowDecl *PrevDecl = nullptr;
2536 if (CheckRedeclaration) {
2537 if (SemaRef.CheckUsingShadowDecl(NewUD, InstTarget, Prev, PrevDecl))
2538 continue;
2539 } else if (UsingShadowDecl *OldPrev =
2540 getPreviousDeclForInstantiation(Shadow)) {
2541 PrevDecl = cast_or_null<UsingShadowDecl>(SemaRef.FindInstantiatedDecl(
2542 Shadow->getLocation(), OldPrev, TemplateArgs));
2543 }
2544
2545 UsingShadowDecl *InstShadow =
2546 SemaRef.BuildUsingShadowDecl(/*Scope*/nullptr, NewUD, InstTarget,
2547 PrevDecl);
2548 SemaRef.Context.setInstantiatedFromUsingShadowDecl(InstShadow, Shadow);
2549
2550 if (isFunctionScope)
2551 SemaRef.CurrentInstantiationScope->InstantiatedLocal(Shadow, InstShadow);
2552 }
2553
2554 return NewUD;
2555}
2556
2557Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) {
2558 // Ignore these; we handle them in bulk when processing the UsingDecl.
2559 return nullptr;
2560}
2561
2562Decl *TemplateDeclInstantiator::VisitConstructorUsingShadowDecl(
2563 ConstructorUsingShadowDecl *D) {
2564 // Ignore these; we handle them in bulk when processing the UsingDecl.
2565 return nullptr;
2566}
2567
2568template <typename T>
2569Decl *TemplateDeclInstantiator::instantiateUnresolvedUsingDecl(
2570 T *D, bool InstantiatingPackElement) {
2571 // If this is a pack expansion, expand it now.
2572 if (D->isPackExpansion() && !InstantiatingPackElement) {
2573 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2574 SemaRef.collectUnexpandedParameterPacks(D->getQualifierLoc(), Unexpanded);
2575 SemaRef.collectUnexpandedParameterPacks(D->getNameInfo(), Unexpanded);
2576
2577 // Determine whether the set of unexpanded parameter packs can and should
2578 // be expanded.
2579 bool Expand = true;
2580 bool RetainExpansion = false;
2581 Optional<unsigned> NumExpansions;
2582 if (SemaRef.CheckParameterPacksForExpansion(
2583 D->getEllipsisLoc(), D->getSourceRange(), Unexpanded, TemplateArgs,
2584 Expand, RetainExpansion, NumExpansions))
2585 return nullptr;
2586
2587 // This declaration cannot appear within a function template signature,
2588 // so we can't have a partial argument list for a parameter pack.
2589 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2590, __PRETTY_FUNCTION__))
2590 "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2590, __PRETTY_FUNCTION__))
;
2591
2592 if (!Expand) {
2593 // We cannot fully expand the pack expansion now, so substitute into the
2594 // pattern and create a new pack expansion.
2595 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2596 return instantiateUnresolvedUsingDecl(D, true);
2597 }
2598
2599 // Within a function, we don't have any normal way to check for conflicts
2600 // between shadow declarations from different using declarations in the
2601 // same pack expansion, but this is always ill-formed because all expansions
2602 // must produce (conflicting) enumerators.
2603 //
2604 // Sadly we can't just reject this in the template definition because it
2605 // could be valid if the pack is empty or has exactly one expansion.
2606 if (D->getDeclContext()->isFunctionOrMethod() && *NumExpansions > 1) {
2607 SemaRef.Diag(D->getEllipsisLoc(),
2608 diag::err_using_decl_redeclaration_expansion);
2609 return nullptr;
2610 }
2611
2612 // Instantiate the slices of this pack and build a UsingPackDecl.
2613 SmallVector<NamedDecl*, 8> Expansions;
2614 for (unsigned I = 0; I != *NumExpansions; ++I) {
2615 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2616 Decl *Slice = instantiateUnresolvedUsingDecl(D, true);
2617 if (!Slice)
2618 return nullptr;
2619 // Note that we can still get unresolved using declarations here, if we
2620 // had arguments for all packs but the pattern also contained other
2621 // template arguments (this only happens during partial substitution, eg
2622 // into the body of a generic lambda in a function template).
2623 Expansions.push_back(cast<NamedDecl>(Slice));
2624 }
2625
2626 auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions);
2627 if (isDeclWithinFunction(D))
2628 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD);
2629 return NewD;
2630 }
2631
2632 UnresolvedUsingTypenameDecl *TD = dyn_cast<UnresolvedUsingTypenameDecl>(D);
2633 SourceLocation TypenameLoc = TD ? TD->getTypenameLoc() : SourceLocation();
2634
2635 NestedNameSpecifierLoc QualifierLoc
2636 = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
2637 TemplateArgs);
2638 if (!QualifierLoc)
2639 return nullptr;
2640
2641 CXXScopeSpec SS;
2642 SS.Adopt(QualifierLoc);
2643
2644 DeclarationNameInfo NameInfo
2645 = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
2646
2647 // Produce a pack expansion only if we're not instantiating a particular
2648 // slice of a pack expansion.
2649 bool InstantiatingSlice = D->getEllipsisLoc().isValid() &&
2650 SemaRef.ArgumentPackSubstitutionIndex != -1;
2651 SourceLocation EllipsisLoc =
2652 InstantiatingSlice ? SourceLocation() : D->getEllipsisLoc();
2653
2654 NamedDecl *UD = SemaRef.BuildUsingDeclaration(
2655 /*Scope*/ nullptr, D->getAccess(), D->getUsingLoc(),
2656 /*HasTypename*/ TD, TypenameLoc, SS, NameInfo, EllipsisLoc, nullptr,
2657 /*IsInstantiation*/ true);
2658 if (UD)
2659 SemaRef.Context.setInstantiatedFromUsingDecl(UD, D);
2660
2661 return UD;
2662}
2663
2664Decl *TemplateDeclInstantiator::VisitUnresolvedUsingTypenameDecl(
2665 UnresolvedUsingTypenameDecl *D) {
2666 return instantiateUnresolvedUsingDecl(D);
2667}
2668
2669Decl *TemplateDeclInstantiator::VisitUnresolvedUsingValueDecl(
2670 UnresolvedUsingValueDecl *D) {
2671 return instantiateUnresolvedUsingDecl(D);
2672}
2673
2674Decl *TemplateDeclInstantiator::VisitUsingPackDecl(UsingPackDecl *D) {
2675 SmallVector<NamedDecl*, 8> Expansions;
2676 for (auto *UD : D->expansions()) {
2677 if (auto *NewUD =
2678 SemaRef.FindInstantiatedDecl(D->getLocation(), UD, TemplateArgs))
2679 Expansions.push_back(cast<NamedDecl>(NewUD));
2680 else
2681 return nullptr;
2682 }
2683
2684 auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions);
2685 if (isDeclWithinFunction(D))
2686 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD);
2687 return NewD;
2688}
2689
2690Decl *TemplateDeclInstantiator::VisitClassScopeFunctionSpecializationDecl(
2691 ClassScopeFunctionSpecializationDecl *Decl) {
2692 CXXMethodDecl *OldFD = Decl->getSpecialization();
2693 CXXMethodDecl *NewFD =
2694 cast_or_null<CXXMethodDecl>(VisitCXXMethodDecl(OldFD, nullptr, true));
2695 if (!NewFD)
2696 return nullptr;
2697
2698 LookupResult Previous(SemaRef, NewFD->getNameInfo(), Sema::LookupOrdinaryName,
2699 Sema::ForRedeclaration);
2700
2701 TemplateArgumentListInfo TemplateArgs;
2702 TemplateArgumentListInfo *TemplateArgsPtr = nullptr;
2703 if (Decl->hasExplicitTemplateArgs()) {
2704 TemplateArgs = Decl->templateArgs();
2705 TemplateArgsPtr = &TemplateArgs;
2706 }
2707
2708 SemaRef.LookupQualifiedName(Previous, SemaRef.CurContext);
2709 if (SemaRef.CheckFunctionTemplateSpecialization(NewFD, TemplateArgsPtr,
2710 Previous)) {
2711 NewFD->setInvalidDecl();
2712 return NewFD;
2713 }
2714
2715 // Associate the specialization with the pattern.
2716 FunctionDecl *Specialization = cast<FunctionDecl>(Previous.getFoundDecl());
2717 assert(Specialization && "Class scope Specialization is null")((Specialization && "Class scope Specialization is null"
) ? static_cast<void> (0) : __assert_fail ("Specialization && \"Class scope Specialization is null\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2717, __PRETTY_FUNCTION__))
;
2718 SemaRef.Context.setClassScopeSpecializationPattern(Specialization, OldFD);
2719
2720 return NewFD;
2721}
2722
2723Decl *TemplateDeclInstantiator::VisitOMPThreadPrivateDecl(
2724 OMPThreadPrivateDecl *D) {
2725 SmallVector<Expr *, 5> Vars;
2726 for (auto *I : D->varlists()) {
2727 Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get();
2728 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2728, __PRETTY_FUNCTION__))
;
2729 Vars.push_back(Var);
2730 }
2731
2732 OMPThreadPrivateDecl *TD =
2733 SemaRef.CheckOMPThreadPrivateDecl(D->getLocation(), Vars);
2734
2735 TD->setAccess(AS_public);
2736 Owner->addDecl(TD);
2737
2738 return TD;
2739}
2740
2741Decl *TemplateDeclInstantiator::VisitOMPDeclareReductionDecl(
2742 OMPDeclareReductionDecl *D) {
2743 // Instantiate type and check if it is allowed.
2744 QualType SubstReductionType = SemaRef.ActOnOpenMPDeclareReductionType(
2745 D->getLocation(),
2746 ParsedType::make(SemaRef.SubstType(D->getType(), TemplateArgs,
2747 D->getLocation(), DeclarationName())));
2748 if (SubstReductionType.isNull())
2749 return nullptr;
2750 bool IsCorrect = !SubstReductionType.isNull();
2751 // Create instantiated copy.
2752 std::pair<QualType, SourceLocation> ReductionTypes[] = {
2753 std::make_pair(SubstReductionType, D->getLocation())};
2754 auto *PrevDeclInScope = D->getPrevDeclInScope();
2755 if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) {
2756 PrevDeclInScope = cast<OMPDeclareReductionDecl>(
2757 SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope)
2758 ->get<Decl *>());
2759 }
2760 auto DRD = SemaRef.ActOnOpenMPDeclareReductionDirectiveStart(
2761 /*S=*/nullptr, Owner, D->getDeclName(), ReductionTypes, D->getAccess(),
2762 PrevDeclInScope);
2763 auto *NewDRD = cast<OMPDeclareReductionDecl>(DRD.get().getSingleDecl());
2764 if (isDeclWithinFunction(NewDRD))
2765 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDRD);
2766 Expr *SubstCombiner = nullptr;
2767 Expr *SubstInitializer = nullptr;
2768 // Combiners instantiation sequence.
2769 if (D->getCombiner()) {
2770 SemaRef.ActOnOpenMPDeclareReductionCombinerStart(
2771 /*S=*/nullptr, NewDRD);
2772 const char *Names[] = {"omp_in", "omp_out"};
2773 for (auto &Name : Names) {
2774 DeclarationName DN(&SemaRef.Context.Idents.get(Name));
2775 auto OldLookup = D->lookup(DN);
2776 auto Lookup = NewDRD->lookup(DN);
2777 if (!OldLookup.empty() && !Lookup.empty()) {
2778 assert(Lookup.size() == 1 && OldLookup.size() == 1)((Lookup.size() == 1 && OldLookup.size() == 1) ? static_cast
<void> (0) : __assert_fail ("Lookup.size() == 1 && OldLookup.size() == 1"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2778, __PRETTY_FUNCTION__))
;
2779 SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldLookup.front(),
2780 Lookup.front());
2781 }
2782 }
2783 SubstCombiner = SemaRef.SubstExpr(D->getCombiner(), TemplateArgs).get();
2784 SemaRef.ActOnOpenMPDeclareReductionCombinerEnd(NewDRD, SubstCombiner);
2785 // Initializers instantiation sequence.
2786 if (D->getInitializer()) {
2787 SemaRef.ActOnOpenMPDeclareReductionInitializerStart(
2788 /*S=*/nullptr, NewDRD);
2789 const char *Names[] = {"omp_orig", "omp_priv"};
2790 for (auto &Name : Names) {
2791 DeclarationName DN(&SemaRef.Context.Idents.get(Name));
2792 auto OldLookup = D->lookup(DN);
2793 auto Lookup = NewDRD->lookup(DN);
2794 if (!OldLookup.empty() && !Lookup.empty()) {
2795 assert(Lookup.size() == 1 && OldLookup.size() == 1)((Lookup.size() == 1 && OldLookup.size() == 1) ? static_cast
<void> (0) : __assert_fail ("Lookup.size() == 1 && OldLookup.size() == 1"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2795, __PRETTY_FUNCTION__))
;
2796 SemaRef.CurrentInstantiationScope->InstantiatedLocal(
2797 OldLookup.front(), Lookup.front());
2798 }
2799 }
2800 SubstInitializer =
2801 SemaRef.SubstExpr(D->getInitializer(), TemplateArgs).get();
2802 SemaRef.ActOnOpenMPDeclareReductionInitializerEnd(NewDRD,
2803 SubstInitializer);
2804 }
2805 IsCorrect = IsCorrect && SubstCombiner &&
2806 (!D->getInitializer() || SubstInitializer);
2807 } else
2808 IsCorrect = false;
2809
2810 (void)SemaRef.ActOnOpenMPDeclareReductionDirectiveEnd(/*S=*/nullptr, DRD,
2811 IsCorrect);
2812
2813 return NewDRD;
2814}
2815
2816Decl *TemplateDeclInstantiator::VisitOMPCapturedExprDecl(
2817 OMPCapturedExprDecl * /*D*/) {
2818 llvm_unreachable("Should not be met in templates")::llvm::llvm_unreachable_internal("Should not be met in templates"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2818)
;
2819}
2820
2821Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D) {
2822 return VisitFunctionDecl(D, nullptr);
2823}
2824
2825Decl *
2826TemplateDeclInstantiator::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
2827 return VisitFunctionDecl(D, nullptr);
2828}
2829
2830Decl *TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D) {
2831 return VisitCXXMethodDecl(D, nullptr);
2832}
2833
2834Decl *TemplateDeclInstantiator::VisitRecordDecl(RecordDecl *D) {
2835 llvm_unreachable("There are only CXXRecordDecls in C++")::llvm::llvm_unreachable_internal("There are only CXXRecordDecls in C++"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2835)
;
2836}
2837
2838Decl *
2839TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl(
2840 ClassTemplateSpecializationDecl *D) {
2841 // As a MS extension, we permit class-scope explicit specialization
2842 // of member class templates.
2843 ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate();
2844 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2847, __PRETTY_FUNCTION__))
2845 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2847, __PRETTY_FUNCTION__))
2846 "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2847, __PRETTY_FUNCTION__))
2847 "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2847, __PRETTY_FUNCTION__))
;
2848
2849 // Lookup the already-instantiated declaration in the instantiation
2850 // of the class template. FIXME: Diagnose or assert if this fails?
2851 DeclContext::lookup_result Found
2852 = Owner->lookup(ClassTemplate->getDeclName());
2853 if (Found.empty())
2854 return nullptr;
2855 ClassTemplateDecl *InstClassTemplate
2856 = dyn_cast<ClassTemplateDecl>(Found.front());
2857 if (!InstClassTemplate)
2858 return nullptr;
2859
2860 // Substitute into the template arguments of the class template explicit
2861 // specialization.
2862 TemplateSpecializationTypeLoc Loc = D->getTypeAsWritten()->getTypeLoc().
2863 castAs<TemplateSpecializationTypeLoc>();
2864 TemplateArgumentListInfo InstTemplateArgs(Loc.getLAngleLoc(),
2865 Loc.getRAngleLoc());
2866 SmallVector<TemplateArgumentLoc, 4> ArgLocs;
2867 for (unsigned I = 0; I != Loc.getNumArgs(); ++I)
2868 ArgLocs.push_back(Loc.getArgLoc(I));
2869 if (SemaRef.Subst(ArgLocs.data(), ArgLocs.size(),
2870 InstTemplateArgs, TemplateArgs))
2871 return nullptr;
2872
2873 // Check that the template argument list is well-formed for this
2874 // class template.
2875 SmallVector<TemplateArgument, 4> Converted;
2876 if (SemaRef.CheckTemplateArgumentList(InstClassTemplate,
2877 D->getLocation(),
2878 InstTemplateArgs,
2879 false,
2880 Converted))
2881 return nullptr;
2882
2883 // Figure out where to insert this class template explicit specialization
2884 // in the member template's set of class template explicit specializations.
2885 void *InsertPos = nullptr;
2886 ClassTemplateSpecializationDecl *PrevDecl =
2887 InstClassTemplate->findSpecialization(Converted, InsertPos);
2888
2889 // Check whether we've already seen a conflicting instantiation of this
2890 // declaration (for instance, if there was a prior implicit instantiation).
2891 bool Ignored;
2892 if (PrevDecl &&
2893 SemaRef.CheckSpecializationInstantiationRedecl(D->getLocation(),
2894 D->getSpecializationKind(),
2895 PrevDecl,
2896 PrevDecl->getSpecializationKind(),
2897 PrevDecl->getPointOfInstantiation(),
2898 Ignored))
2899 return nullptr;
2900
2901 // If PrevDecl was a definition and D is also a definition, diagnose.
2902 // This happens in cases like:
2903 //
2904 // template<typename T, typename U>
2905 // struct Outer {
2906 // template<typename X> struct Inner;
2907 // template<> struct Inner<T> {};
2908 // template<> struct Inner<U> {};
2909 // };
2910 //
2911 // Outer<int, int> outer; // error: the explicit specializations of Inner
2912 // // have the same signature.
2913 if (PrevDecl && PrevDecl->getDefinition() &&
2914 D->isThisDeclarationADefinition()) {
2915 SemaRef.Diag(D->getLocation(), diag::err_redefinition) << PrevDecl;
2916 SemaRef.Diag(PrevDecl->getDefinition()->getLocation(),
2917 diag::note_previous_definition);
2918 return nullptr;
2919 }
2920
2921 // Create the class template partial specialization declaration.
2922 ClassTemplateSpecializationDecl *InstD
2923 = ClassTemplateSpecializationDecl::Create(SemaRef.Context,
2924 D->getTagKind(),
2925 Owner,
2926 D->getLocStart(),
2927 D->getLocation(),
2928 InstClassTemplate,
2929 Converted,
2930 PrevDecl);
2931
2932 // Add this partial specialization to the set of class template partial
2933 // specializations.
2934 if (!PrevDecl)
2935 InstClassTemplate->AddSpecialization(InstD, InsertPos);
2936
2937 // Substitute the nested name specifier, if any.
2938 if (SubstQualifier(D, InstD))
2939 return nullptr;
2940
2941 // Build the canonical type that describes the converted template
2942 // arguments of the class template explicit specialization.
2943 QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
2944 TemplateName(InstClassTemplate), Converted,
2945 SemaRef.Context.getRecordType(InstD));
2946
2947 // Build the fully-sugared type for this class template
2948 // specialization as the user wrote in the specialization
2949 // itself. This means that we'll pretty-print the type retrieved
2950 // from the specialization's declaration the way that the user
2951 // actually wrote the specialization, rather than formatting the
2952 // name based on the "canonical" representation used to store the
2953 // template arguments in the specialization.
2954 TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo(
2955 TemplateName(InstClassTemplate), D->getLocation(), InstTemplateArgs,
2956 CanonType);
2957
2958 InstD->setAccess(D->getAccess());
2959 InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
2960 InstD->setSpecializationKind(D->getSpecializationKind());
2961 InstD->setTypeAsWritten(WrittenTy);
2962 InstD->setExternLoc(D->getExternLoc());
2963 InstD->setTemplateKeywordLoc(D->getTemplateKeywordLoc());
2964
2965 Owner->addDecl(InstD);
2966
2967 // Instantiate the members of the class-scope explicit specialization eagerly.
2968 // We don't have support for lazy instantiation of an explicit specialization
2969 // yet, and MSVC eagerly instantiates in this case.
2970 if (D->isThisDeclarationADefinition() &&
2971 SemaRef.InstantiateClass(D->getLocation(), InstD, D, TemplateArgs,
2972 TSK_ImplicitInstantiation,
2973 /*Complain=*/true))
2974 return nullptr;
2975
2976 return InstD;
2977}
2978
2979Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl(
2980 VarTemplateSpecializationDecl *D) {
2981
2982 TemplateArgumentListInfo VarTemplateArgsInfo;
2983 VarTemplateDecl *VarTemplate = D->getSpecializedTemplate();
2984 assert(VarTemplate &&((VarTemplate && "A template specialization without specialized template?"
) ? static_cast<void> (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2985, __PRETTY_FUNCTION__))
2985 "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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2985, __PRETTY_FUNCTION__))
;
2986
2987 // Substitute the current template arguments.
2988 const TemplateArgumentListInfo &TemplateArgsInfo = D->getTemplateArgsInfo();
2989 VarTemplateArgsInfo.setLAngleLoc(TemplateArgsInfo.getLAngleLoc());
2990 VarTemplateArgsInfo.setRAngleLoc(TemplateArgsInfo.getRAngleLoc());
2991
2992 if (SemaRef.Subst(TemplateArgsInfo.getArgumentArray(),
2993 TemplateArgsInfo.size(), VarTemplateArgsInfo, TemplateArgs))
2994 return nullptr;
2995
2996 // Check that the template argument list is well-formed for this template.
2997 SmallVector<TemplateArgument, 4> Converted;
2998 if (SemaRef.CheckTemplateArgumentList(
2999 VarTemplate, VarTemplate->getLocStart(),
3000 const_cast<TemplateArgumentListInfo &>(VarTemplateArgsInfo), false,
3001 Converted))
3002 return nullptr;
3003
3004 // Find the variable template specialization declaration that
3005 // corresponds to these arguments.
3006 void *InsertPos = nullptr;
3007 if (VarTemplateSpecializationDecl *VarSpec = VarTemplate->findSpecialization(
3008 Converted, InsertPos))
3009 // If we already have a variable template specialization, return it.
3010 return VarSpec;
3011
3012 return VisitVarTemplateSpecializationDecl(VarTemplate, D, InsertPos,
3013 VarTemplateArgsInfo, Converted);
3014}
3015
3016Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl(
3017 VarTemplateDecl *VarTemplate, VarDecl *D, void *InsertPos,
3018 const TemplateArgumentListInfo &TemplateArgsInfo,
3019 ArrayRef<TemplateArgument> Converted) {
3020
3021 // Do substitution on the type of the declaration
3022 TypeSourceInfo *DI =
3023 SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs,
3024 D->getTypeSpecStartLoc(), D->getDeclName());
3025 if (!DI)
3026 return nullptr;
3027
3028 if (DI->getType()->isFunctionType()) {
3029 SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function)
3030 << D->isStaticDataMember() << DI->getType();
3031 return nullptr;
3032 }
3033
3034 // Build the instantiated declaration
3035 VarTemplateSpecializationDecl *Var = VarTemplateSpecializationDecl::Create(
3036 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
3037 VarTemplate, DI->getType(), DI, D->getStorageClass(), Converted);
3038 Var->setTemplateArgsInfo(TemplateArgsInfo);
3039 if (InsertPos)
3040 VarTemplate->AddSpecialization(Var, InsertPos);
3041
3042 // Substitute the nested name specifier, if any.
3043 if (SubstQualifier(D, Var))
3044 return nullptr;
3045
3046 SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs,
3047 Owner, StartingScope);
3048
3049 return Var;
3050}
3051
3052Decl *TemplateDeclInstantiator::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
3053 llvm_unreachable("@defs is not supported in Objective-C++")::llvm::llvm_unreachable_internal("@defs is not supported in Objective-C++"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3053)
;
3054}
3055
3056Decl *TemplateDeclInstantiator::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
3057 // FIXME: We need to be able to instantiate FriendTemplateDecls.
3058 unsigned DiagID = SemaRef.getDiagnostics().getCustomDiagID(
3059 DiagnosticsEngine::Error,
3060 "cannot instantiate %0 yet");
3061 SemaRef.Diag(D->getLocation(), DiagID)
3062 << D->getDeclKindName();
3063
3064 return nullptr;
3065}
3066
3067Decl *TemplateDeclInstantiator::VisitDecl(Decl *D) {
3068 llvm_unreachable("Unexpected decl")::llvm::llvm_unreachable_internal("Unexpected decl", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3068)
;
3069}
3070
3071Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner,
3072 const MultiLevelTemplateArgumentList &TemplateArgs) {
3073 TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs);
3074 if (D->isInvalidDecl())
3075 return nullptr;
3076
3077 return Instantiator.Visit(D);
3078}
3079
3080/// \brief Instantiates a nested template parameter list in the current
3081/// instantiation context.
3082///
3083/// \param L The parameter list to instantiate
3084///
3085/// \returns NULL if there was an error
3086TemplateParameterList *
3087TemplateDeclInstantiator::SubstTemplateParams(TemplateParameterList *L) {
3088 // Get errors for all the parameters before bailing out.
3089 bool Invalid = false;
3090
3091 unsigned N = L->size();
3092 typedef SmallVector<NamedDecl *, 8> ParamVector;
3093 ParamVector Params;
3094 Params.reserve(N);
3095 for (auto &P : *L) {
3096 NamedDecl *D = cast_or_null<NamedDecl>(Visit(P));
3097 Params.push_back(D);
3098 Invalid = Invalid || !D || D->isInvalidDecl();
3099 }
3100
3101 // Clean up if we had an error.
3102 if (Invalid)
3103 return nullptr;
3104
3105 // Note: we substitute into associated constraints later
3106 Expr *const UninstantiatedRequiresClause = L->getRequiresClause();
3107
3108 TemplateParameterList *InstL
3109 = TemplateParameterList::Create(SemaRef.Context, L->getTemplateLoc(),
3110 L->getLAngleLoc(), Params,
3111 L->getRAngleLoc(),
3112 UninstantiatedRequiresClause);
3113 return InstL;
3114}
3115
3116/// \brief Instantiate the declaration of a class template partial
3117/// specialization.
3118///
3119/// \param ClassTemplate the (instantiated) class template that is partially
3120// specialized by the instantiation of \p PartialSpec.
3121///
3122/// \param PartialSpec the (uninstantiated) class template partial
3123/// specialization that we are instantiating.
3124///
3125/// \returns The instantiated partial specialization, if successful; otherwise,
3126/// NULL to indicate an error.
3127ClassTemplatePartialSpecializationDecl *
3128TemplateDeclInstantiator::InstantiateClassTemplatePartialSpecialization(
3129 ClassTemplateDecl *ClassTemplate,
3130 ClassTemplatePartialSpecializationDecl *PartialSpec) {
3131 // Create a local instantiation scope for this class template partial
3132 // specialization, which will contain the instantiations of the template
3133 // parameters.
3134 LocalInstantiationScope Scope(SemaRef);
3135
3136 // Substitute into the template parameters of the class template partial
3137 // specialization.
3138 TemplateParameterList *TempParams = PartialSpec->getTemplateParameters();
3139 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
3140 if (!InstParams)
3141 return nullptr;
3142
3143 // Substitute into the template arguments of the class template partial
3144 // specialization.
3145 const ASTTemplateArgumentListInfo *TemplArgInfo
3146 = PartialSpec->getTemplateArgsAsWritten();
3147 TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc,
3148 TemplArgInfo->RAngleLoc);
3149 if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(),
3150 TemplArgInfo->NumTemplateArgs,
3151 InstTemplateArgs, TemplateArgs))
3152 return nullptr;
3153
3154 // Check that the template argument list is well-formed for this
3155 // class template.
3156 SmallVector<TemplateArgument, 4> Converted;
3157 if (SemaRef.CheckTemplateArgumentList(ClassTemplate,
3158 PartialSpec->getLocation(),
3159 InstTemplateArgs,
3160 false,
3161 Converted))
3162 return nullptr;
3163
3164 // Check these arguments are valid for a template partial specialization.
3165 if (SemaRef.CheckTemplatePartialSpecializationArgs(
3166 PartialSpec->getLocation(), ClassTemplate, InstTemplateArgs.size(),
3167 Converted))
3168 return nullptr;
3169
3170 // Figure out where to insert this class template partial specialization
3171 // in the member template's set of class template partial specializations.
3172 void *InsertPos = nullptr;
3173 ClassTemplateSpecializationDecl *PrevDecl
3174 = ClassTemplate->findPartialSpecialization(Converted, InsertPos);
3175
3176 // Build the canonical type that describes the converted template
3177 // arguments of the class template partial specialization.
3178 QualType CanonType
3179 = SemaRef.Context.getTemplateSpecializationType(TemplateName(ClassTemplate),
3180 Converted);
3181
3182 // Build the fully-sugared type for this class template
3183 // specialization as the user wrote in the specialization
3184 // itself. This means that we'll pretty-print the type retrieved
3185 // from the specialization's declaration the way that the user
3186 // actually wrote the specialization, rather than formatting the
3187 // name based on the "canonical" representation used to store the
3188 // template arguments in the specialization.
3189 TypeSourceInfo *WrittenTy
3190 = SemaRef.Context.getTemplateSpecializationTypeInfo(
3191 TemplateName(ClassTemplate),
3192 PartialSpec->getLocation(),
3193 InstTemplateArgs,
3194 CanonType);
3195
3196 if (PrevDecl) {
3197 // We've already seen a partial specialization with the same template
3198 // parameters and template arguments. This can happen, for example, when
3199 // substituting the outer template arguments ends up causing two
3200 // class template partial specializations of a member class template
3201 // to have identical forms, e.g.,
3202 //
3203 // template<typename T, typename U>
3204 // struct Outer {
3205 // template<typename X, typename Y> struct Inner;
3206 // template<typename Y> struct Inner<T, Y>;
3207 // template<typename Y> struct Inner<U, Y>;
3208 // };
3209 //
3210 // Outer<int, int> outer; // error: the partial specializations of Inner
3211 // // have the same signature.
3212 SemaRef.Diag(PartialSpec->getLocation(), diag::err_partial_spec_redeclared)
3213 << WrittenTy->getType();
3214 SemaRef.Diag(PrevDecl->getLocation(), diag::note_prev_partial_spec_here)
3215 << SemaRef.Context.getTypeDeclType(PrevDecl);
3216 return nullptr;
3217 }
3218
3219
3220 // Create the class template partial specialization declaration.
3221 ClassTemplatePartialSpecializationDecl *InstPartialSpec
3222 = ClassTemplatePartialSpecializationDecl::Create(SemaRef.Context,
3223 PartialSpec->getTagKind(),
3224 Owner,
3225 PartialSpec->getLocStart(),
3226 PartialSpec->getLocation(),
3227 InstParams,
3228 ClassTemplate,
3229 Converted,
3230 InstTemplateArgs,
3231 CanonType,
3232 nullptr);
3233 // Substitute the nested name specifier, if any.
3234 if (SubstQualifier(PartialSpec, InstPartialSpec))
3235 return nullptr;
3236
3237 InstPartialSpec->setInstantiatedFromMember(PartialSpec);
3238 InstPartialSpec->setTypeAsWritten(WrittenTy);
3239
3240 // Check the completed partial specialization.
3241 SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec);
3242
3243 // Add this partial specialization to the set of class template partial
3244 // specializations.
3245 ClassTemplate->AddPartialSpecialization(InstPartialSpec,
3246 /*InsertPos=*/nullptr);
3247 return InstPartialSpec;
3248}
3249
3250/// \brief Instantiate the declaration of a variable template partial
3251/// specialization.
3252///
3253/// \param VarTemplate the (instantiated) variable template that is partially
3254/// specialized by the instantiation of \p PartialSpec.
3255///
3256/// \param PartialSpec the (uninstantiated) variable template partial
3257/// specialization that we are instantiating.
3258///
3259/// \returns The instantiated partial specialization, if successful; otherwise,
3260/// NULL to indicate an error.
3261VarTemplatePartialSpecializationDecl *
3262TemplateDeclInstantiator::InstantiateVarTemplatePartialSpecialization(
3263 VarTemplateDecl *VarTemplate,
3264 VarTemplatePartialSpecializationDecl *PartialSpec) {
3265 // Create a local instantiation scope for this variable template partial
3266 // specialization, which will contain the instantiations of the template
3267 // parameters.
3268 LocalInstantiationScope Scope(SemaRef);
3269
3270 // Substitute into the template parameters of the variable template partial
3271 // specialization.
3272 TemplateParameterList *TempParams = PartialSpec->getTemplateParameters();
3273 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
3274 if (!InstParams)
3275 return nullptr;
3276
3277 // Substitute into the template arguments of the variable template partial
3278 // specialization.
3279 const ASTTemplateArgumentListInfo *TemplArgInfo
3280 = PartialSpec->getTemplateArgsAsWritten();
3281 TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc,
3282 TemplArgInfo->RAngleLoc);
3283 if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(),
3284 TemplArgInfo->NumTemplateArgs,
3285 InstTemplateArgs, TemplateArgs))
3286 return nullptr;
3287
3288 // Check that the template argument list is well-formed for this
3289 // class template.
3290 SmallVector<TemplateArgument, 4> Converted;
3291 if (SemaRef.CheckTemplateArgumentList(VarTemplate, PartialSpec->getLocation(),
3292 InstTemplateArgs, false, Converted))
3293 return nullptr;
3294
3295 // Check these arguments are valid for a template partial specialization.
3296 if (SemaRef.CheckTemplatePartialSpecializationArgs(
3297 PartialSpec->getLocation(), VarTemplate, InstTemplateArgs.size(),
3298 Converted))
3299 return nullptr;
3300
3301 // Figure out where to insert this variable template partial specialization
3302 // in the member template's set of variable template partial specializations.
3303 void *InsertPos = nullptr;
3304 VarTemplateSpecializationDecl *PrevDecl =
3305 VarTemplate->findPartialSpecialization(Converted, InsertPos);
3306
3307 // Build the canonical type that describes the converted template
3308 // arguments of the variable template partial specialization.
3309 QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
3310 TemplateName(VarTemplate), Converted);
3311
3312 // Build the fully-sugared type for this variable template
3313 // specialization as the user wrote in the specialization
3314 // itself. This means that we'll pretty-print the type retrieved
3315 // from the specialization's declaration the way that the user
3316 // actually wrote the specialization, rather than formatting the
3317 // name based on the "canonical" representation used to store the
3318 // template arguments in the specialization.
3319 TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo(
3320 TemplateName(VarTemplate), PartialSpec->getLocation(), InstTemplateArgs,
3321 CanonType);
3322
3323 if (PrevDecl) {
3324 // We've already seen a partial specialization with the same template
3325 // parameters and template arguments. This can happen, for example, when
3326 // substituting the outer template arguments ends up causing two
3327 // variable template partial specializations of a member variable template
3328 // to have identical forms, e.g.,
3329 //
3330 // template<typename T, typename U>
3331 // struct Outer {
3332 // template<typename X, typename Y> pair<X,Y> p;
3333 // template<typename Y> pair<T, Y> p;
3334 // template<typename Y> pair<U, Y> p;
3335 // };
3336 //
3337 // Outer<int, int> outer; // error: the partial specializations of Inner
3338 // // have the same signature.
3339 SemaRef.Diag(PartialSpec->getLocation(),
3340 diag::err_var_partial_spec_redeclared)
3341 << WrittenTy->getType();
3342 SemaRef.Diag(PrevDecl->getLocation(),
3343 diag::note_var_prev_partial_spec_here);
3344 return nullptr;
3345 }
3346
3347 // Do substitution on the type of the declaration
3348 TypeSourceInfo *DI = SemaRef.SubstType(
3349 PartialSpec->getTypeSourceInfo(), TemplateArgs,
3350 PartialSpec->getTypeSpecStartLoc(), PartialSpec->getDeclName());
3351 if (!DI)
3352 return nullptr;
3353
3354 if (DI->getType()->isFunctionType()) {
3355 SemaRef.Diag(PartialSpec->getLocation(),
3356 diag::err_variable_instantiates_to_function)
3357 << PartialSpec->isStaticDataMember() << DI->getType();
3358 return nullptr;
3359 }
3360
3361 // Create the variable template partial specialization declaration.
3362 VarTemplatePartialSpecializationDecl *InstPartialSpec =
3363 VarTemplatePartialSpecializationDecl::Create(
3364 SemaRef.Context, Owner, PartialSpec->getInnerLocStart(),
3365 PartialSpec->getLocation(), InstParams, VarTemplate, DI->getType(),
3366 DI, PartialSpec->getStorageClass(), Converted, InstTemplateArgs);
3367
3368 // Substitute the nested name specifier, if any.
3369 if (SubstQualifier(PartialSpec, InstPartialSpec))
3370 return nullptr;
3371
3372 InstPartialSpec->setInstantiatedFromMember(PartialSpec);
3373 InstPartialSpec->setTypeAsWritten(WrittenTy);
3374
3375 // Check the completed partial specialization.
3376 SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec);
3377
3378 // Add this partial specialization to the set of variable template partial
3379 // specializations. The instantiation of the initializer is not necessary.
3380 VarTemplate->AddPartialSpecialization(InstPartialSpec, /*InsertPos=*/nullptr);
3381
3382 SemaRef.BuildVariableInstantiation(InstPartialSpec, PartialSpec, TemplateArgs,
3383 LateAttrs, Owner, StartingScope);
3384
3385 return InstPartialSpec;
3386}
3387
3388TypeSourceInfo*
3389TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D,
3390 SmallVectorImpl<ParmVarDecl *> &Params) {
3391 TypeSourceInfo *OldTInfo = D->getTypeSourceInfo();
3392 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3392, __PRETTY_FUNCTION__))
;
3393 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3393, __PRETTY_FUNCTION__))
;
3394
3395 CXXRecordDecl *ThisContext = nullptr;
3396 unsigned ThisTypeQuals = 0;
3397 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
3398 ThisContext = cast<CXXRecordDecl>(Owner);
3399 ThisTypeQuals = Method->getTypeQualifiers();
3400 }
3401
3402 TypeSourceInfo *NewTInfo
3403 = SemaRef.SubstFunctionDeclType(OldTInfo, TemplateArgs,
3404 D->getTypeSpecStartLoc(),
3405 D->getDeclName(),
3406 ThisContext, ThisTypeQuals);
3407 if (!NewTInfo)
3408 return nullptr;
3409
3410 TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens();
3411 if (FunctionProtoTypeLoc OldProtoLoc = OldTL.getAs<FunctionProtoTypeLoc>()) {
3412 if (NewTInfo != OldTInfo) {
3413 // Get parameters from the new type info.
3414 TypeLoc NewTL = NewTInfo->getTypeLoc().IgnoreParens();
3415 FunctionProtoTypeLoc NewProtoLoc = NewTL.castAs<FunctionProtoTypeLoc>();
3416 unsigned NewIdx = 0;
3417 for (unsigned OldIdx = 0, NumOldParams = OldProtoLoc.getNumParams();
3418 OldIdx != NumOldParams; ++OldIdx) {
3419 ParmVarDecl *OldParam = OldProtoLoc.getParam(OldIdx);
3420 LocalInstantiationScope *Scope = SemaRef.CurrentInstantiationScope;
3421
3422 Optional<unsigned> NumArgumentsInExpansion;
3423 if (OldParam->isParameterPack())
3424 NumArgumentsInExpansion =
3425 SemaRef.getNumArgumentsInExpansion(OldParam->getType(),
3426 TemplateArgs);
3427 if (!NumArgumentsInExpansion) {
3428 // Simple case: normal parameter, or a parameter pack that's
3429 // instantiated to a (still-dependent) parameter pack.
3430 ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++);
3431 Params.push_back(NewParam);
3432 Scope->InstantiatedLocal(OldParam, NewParam);
3433 } else {
3434 // Parameter pack expansion: make the instantiation an argument pack.
3435 Scope->MakeInstantiatedLocalArgPack(OldParam);
3436 for (unsigned I = 0; I != *NumArgumentsInExpansion; ++I) {
3437 ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++);
3438 Params.push_back(NewParam);
3439 Scope->InstantiatedLocalPackArg(OldParam, NewParam);
3440 }
3441 }
3442 }
3443 } else {
3444 // The function type itself was not dependent and therefore no
3445 // substitution occurred. However, we still need to instantiate
3446 // the function parameters themselves.
3447 const FunctionProtoType *OldProto =
3448 cast<FunctionProtoType>(OldProtoLoc.getType());
3449 for (unsigned i = 0, i_end = OldProtoLoc.getNumParams(); i != i_end;
3450 ++i) {
3451 ParmVarDecl *OldParam = OldProtoLoc.getParam(i);
3452 if (!OldParam) {
3453 Params.push_back(SemaRef.BuildParmVarDeclForTypedef(
3454 D, D->getLocation(), OldProto->getParamType(i)));
3455 continue;
3456 }
3457
3458 ParmVarDecl *Parm =
3459 cast_or_null<ParmVarDecl>(VisitParmVarDecl(OldParam));
3460 if (!Parm)
3461 return nullptr;
3462 Params.push_back(Parm);
3463 }
3464 }
3465 } else {
3466 // If the type of this function, after ignoring parentheses, is not
3467 // *directly* a function type, then we're instantiating a function that
3468 // was declared via a typedef or with attributes, e.g.,
3469 //
3470 // typedef int functype(int, int);
3471 // functype func;
3472 // int __cdecl meth(int, int);
3473 //
3474 // In this case, we'll just go instantiate the ParmVarDecls that we
3475 // synthesized in the method declaration.
3476 SmallVector<QualType, 4> ParamTypes;
3477 Sema::ExtParameterInfoBuilder ExtParamInfos;
3478 if (SemaRef.SubstParmTypes(D->getLocation(), D->parameters(), nullptr,
3479 TemplateArgs, ParamTypes, &Params,
3480 ExtParamInfos))
3481 return nullptr;
3482 }
3483
3484 return NewTInfo;
3485}
3486
3487/// Introduce the instantiated function parameters into the local
3488/// instantiation scope, and set the parameter names to those used
3489/// in the template.
3490static bool addInstantiatedParametersToScope(Sema &S, FunctionDecl *Function,
3491 const FunctionDecl *PatternDecl,
3492 LocalInstantiationScope &Scope,
3493 const MultiLevelTemplateArgumentList &TemplateArgs) {
3494 unsigned FParamIdx = 0;
3495 for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I) {
3496 const ParmVarDecl *PatternParam = PatternDecl->getParamDecl(I);
3497 if (!PatternParam->isParameterPack()) {
3498 // Simple case: not a parameter pack.
3499 assert(FParamIdx < Function->getNumParams())((FParamIdx < Function->getNumParams()) ? static_cast<
void> (0) : __assert_fail ("FParamIdx < Function->getNumParams()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3499, __PRETTY_FUNCTION__))
;
3500 ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
3501 FunctionParam->setDeclName(PatternParam->getDeclName());
3502 // If the parameter's type is not dependent, update it to match the type
3503 // in the pattern. They can differ in top-level cv-qualifiers, and we want
3504 // the pattern's type here. If the type is dependent, they can't differ,
3505 // per core issue 1668. Substitute into the type from the pattern, in case
3506 // it's instantiation-dependent.
3507 // FIXME: Updating the type to work around this is at best fragile.
3508 if (!PatternDecl->getType()->isDependentType()) {
3509 QualType T = S.SubstType(PatternParam->getType(), TemplateArgs,
3510 FunctionParam->getLocation(),
3511 FunctionParam->getDeclName());
3512 if (T.isNull())
3513 return true;
3514 FunctionParam->setType(T);
3515 }
3516
3517 Scope.InstantiatedLocal(PatternParam, FunctionParam);
3518 ++FParamIdx;
3519 continue;
3520 }
3521
3522 // Expand the parameter pack.
3523 Scope.MakeInstantiatedLocalArgPack(PatternParam);
3524 Optional<unsigned> NumArgumentsInExpansion
3525 = S.getNumArgumentsInExpansion(PatternParam->getType(), TemplateArgs);
3526 assert(NumArgumentsInExpansion &&((NumArgumentsInExpansion && "should only be called when all template arguments are known"
) ? static_cast<void> (0) : __assert_fail ("NumArgumentsInExpansion && \"should only be called when all template arguments are known\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3527, __PRETTY_FUNCTION__))
3527 "should only be called when all template arguments are known")((NumArgumentsInExpansion && "should only be called when all template arguments are known"
) ? static_cast<void> (0) : __assert_fail ("NumArgumentsInExpansion && \"should only be called when all template arguments are known\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3527, __PRETTY_FUNCTION__))
;
3528 QualType PatternType =
3529 PatternParam->getType()->castAs<PackExpansionType>()->getPattern();
3530 for (unsigned Arg = 0; Arg < *NumArgumentsInExpansion; ++Arg) {
3531 ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
3532 FunctionParam->setDeclName(PatternParam->getDeclName());
3533 if (!PatternDecl->getType()->isDependentType()) {
3534 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, Arg);
3535 QualType T = S.SubstType(PatternType, TemplateArgs,
3536 FunctionParam->getLocation(),
3537 FunctionParam->getDeclName());
3538 if (T.isNull())
3539 return true;
3540 FunctionParam->setType(T);
3541 }
3542
3543 Scope.InstantiatedLocalPackArg(PatternParam, FunctionParam);
3544 ++FParamIdx;
3545 }
3546 }
3547
3548 return false;
3549}
3550
3551void Sema::InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
3552 FunctionDecl *Decl) {
3553 const FunctionProtoType *Proto = Decl->getType()->castAs<FunctionProtoType>();
3554 if (Proto->getExceptionSpecType() != EST_Uninstantiated)
3555 return;
3556
3557 InstantiatingTemplate Inst(*this, PointOfInstantiation, Decl,
3558 InstantiatingTemplate::ExceptionSpecification());
3559 if (Inst.isInvalid()) {
3560 // We hit the instantiation depth limit. Clear the exception specification
3561 // so that our callers don't have to cope with EST_Uninstantiated.
3562 UpdateExceptionSpec(Decl, EST_None);
3563 return;
3564 }
3565 if (Inst.isAlreadyInstantiating()) {
3566 // This exception specification indirectly depends on itself. Reject.
3567 // FIXME: Corresponding rule in the standard?
3568 Diag(PointOfInstantiation, diag::err_exception_spec_cycle) << Decl;
3569 UpdateExceptionSpec(Decl, EST_None);
3570 return;
3571 }
3572
3573 // Enter the scope of this instantiation. We don't use
3574 // PushDeclContext because we don't have a scope.
3575 Sema::ContextRAII savedContext(*this, Decl);
3576 LocalInstantiationScope Scope(*this);
3577
3578 MultiLevelTemplateArgumentList TemplateArgs =
3579 getTemplateInstantiationArgs(Decl, nullptr, /*RelativeToPrimary*/true);
3580
3581 FunctionDecl *Template = Proto->getExceptionSpecTemplate();
3582 if (addInstantiatedParametersToScope(*this, Decl, Template, Scope,
3583 TemplateArgs)) {
3584 UpdateExceptionSpec(Decl, EST_None);
3585 return;
3586 }
3587
3588 SubstExceptionSpec(Decl, Template->getType()->castAs<FunctionProtoType>(),
3589 TemplateArgs);
3590}
3591
3592/// \brief Initializes the common fields of an instantiation function
3593/// declaration (New) from the corresponding fields of its template (Tmpl).
3594///
3595/// \returns true if there was an error
3596bool
3597TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New,
3598 FunctionDecl *Tmpl) {
3599 if (Tmpl->isDeleted())
3600 New->setDeletedAsWritten();
3601
3602 New->setImplicit(Tmpl->isImplicit());
3603
3604 // Forward the mangling number from the template to the instantiated decl.
3605 SemaRef.Context.setManglingNumber(New,
3606 SemaRef.Context.getManglingNumber(Tmpl));
3607
3608 // If we are performing substituting explicitly-specified template arguments
3609 // or deduced template arguments into a function template and we reach this
3610 // point, we are now past the point where SFINAE applies and have committed
3611 // to keeping the new function template specialization. We therefore
3612 // convert the active template instantiation for the function template
3613 // into a template instantiation for this specific function template
3614 // specialization, which is not a SFINAE context, so that we diagnose any
3615 // further errors in the declaration itself.
3616 typedef Sema::CodeSynthesisContext ActiveInstType;
3617 ActiveInstType &ActiveInst = SemaRef.CodeSynthesisContexts.back();
3618 if (ActiveInst.Kind == ActiveInstType::ExplicitTemplateArgumentSubstitution ||
3619 ActiveInst.Kind == ActiveInstType::DeducedTemplateArgumentSubstitution) {
3620 if (FunctionTemplateDecl *FunTmpl
3621 = dyn_cast<FunctionTemplateDecl>(ActiveInst.Entity)) {
3622 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3623, __PRETTY_FUNCTION__))
3623 "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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3623, __PRETTY_FUNCTION__))
;
3624 (void) FunTmpl;
3625 ActiveInst.Kind = ActiveInstType::TemplateInstantiation;
3626 ActiveInst.Entity = New;
3627 }
3628 }
3629
3630 const FunctionProtoType *Proto = Tmpl->getType()->getAs<FunctionProtoType>();
3631 assert(Proto && "Function template without prototype?")((Proto && "Function template without prototype?") ? static_cast
<void> (0) : __assert_fail ("Proto && \"Function template without prototype?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3631, __PRETTY_FUNCTION__))
;
3632
3633 if (Proto->hasExceptionSpec() || Proto->getNoReturnAttr()) {
3634 FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo();
3635
3636 // DR1330: In C++11, defer instantiation of a non-trivial
3637 // exception specification.
3638 // DR1484: Local classes and their members are instantiated along with the
3639 // containing function.
3640 if (SemaRef.getLangOpts().CPlusPlus11 &&
3641 EPI.ExceptionSpec.Type != EST_None &&
3642 EPI.ExceptionSpec.Type != EST_DynamicNone &&
3643 EPI.ExceptionSpec.Type != EST_BasicNoexcept &&
3644 !Tmpl->isLexicallyWithinFunctionOrMethod()) {
3645 FunctionDecl *ExceptionSpecTemplate = Tmpl;
3646 if (EPI.ExceptionSpec.Type == EST_Uninstantiated)
3647 ExceptionSpecTemplate = EPI.ExceptionSpec.SourceTemplate;
3648 ExceptionSpecificationType NewEST = EST_Uninstantiated;
3649 if (EPI.ExceptionSpec.Type == EST_Unevaluated)
3650 NewEST = EST_Unevaluated;
3651
3652 // Mark the function has having an uninstantiated exception specification.
3653 const FunctionProtoType *NewProto
3654 = New->getType()->getAs<FunctionProtoType>();
3655 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3655, __PRETTY_FUNCTION__))
;
3656 EPI = NewProto->getExtProtoInfo();
3657 EPI.ExceptionSpec.Type = NewEST;
3658 EPI.ExceptionSpec.SourceDecl = New;
3659 EPI.ExceptionSpec.SourceTemplate = ExceptionSpecTemplate;
3660 New->setType(SemaRef.Context.getFunctionType(
3661 NewProto->getReturnType(), NewProto->getParamTypes(), EPI));
3662 } else {
3663 SemaRef.SubstExceptionSpec(New, Proto, TemplateArgs);
3664 }
3665 }
3666
3667 // Get the definition. Leaves the variable unchanged if undefined.
3668 const FunctionDecl *Definition = Tmpl;
3669 Tmpl->isDefined(Definition);
3670
3671 SemaRef.InstantiateAttrs(TemplateArgs, Definition, New,
3672 LateAttrs, StartingScope);
3673
3674 return false;
3675}
3676
3677/// \brief Initializes common fields of an instantiated method
3678/// declaration (New) from the corresponding fields of its template
3679/// (Tmpl).
3680///
3681/// \returns true if there was an error
3682bool
3683TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New,
3684 CXXMethodDecl *Tmpl) {
3685 if (InitFunctionInstantiation(New, Tmpl))
3686 return true;
3687
3688 New->setAccess(Tmpl->getAccess());
3689 if (Tmpl->isVirtualAsWritten())
3690 New->setVirtualAsWritten(true);
3691
3692 // FIXME: New needs a pointer to Tmpl
3693 return false;
3694}
3695
3696/// In the MS ABI, we need to instantiate default arguments of dllexported
3697/// default constructors along with the constructor definition. This allows IR
3698/// gen to emit a constructor closure which calls the default constructor with
3699/// its default arguments.
3700static void InstantiateDefaultCtorDefaultArgs(Sema &S,
3701 CXXConstructorDecl *Ctor) {
3702 assert(S.Context.getTargetInfo().getCXXABI().isMicrosoft() &&((S.Context.getTargetInfo().getCXXABI().isMicrosoft() &&
Ctor->isDefaultConstructor()) ? static_cast<void> (
0) : __assert_fail ("S.Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3703, __PRETTY_FUNCTION__))
3703 Ctor->isDefaultConstructor())((S.Context.getTargetInfo().getCXXABI().isMicrosoft() &&
Ctor->isDefaultConstructor()) ? static_cast<void> (
0) : __assert_fail ("S.Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3703, __PRETTY_FUNCTION__))
;
3704 unsigned NumParams = Ctor->getNumParams();
3705 if (NumParams == 0)
3706 return;
3707 DLLExportAttr *Attr = Ctor->getAttr<DLLExportAttr>();
3708 if (!Attr)
3709 return;
3710 for (unsigned I = 0; I != NumParams; ++I) {
3711 (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), Ctor,
3712 Ctor->getParamDecl(I));
3713 S.DiscardCleanupsInEvaluationContext();
3714 }
3715}
3716
3717/// \brief Instantiate the definition of the given function from its
3718/// template.
3719///
3720/// \param PointOfInstantiation the point at which the instantiation was
3721/// required. Note that this is not precisely a "point of instantiation"
3722/// for the function, but it's close.
3723///
3724/// \param Function the already-instantiated declaration of a
3725/// function template specialization or member function of a class template
3726/// specialization.
3727///
3728/// \param Recursive if true, recursively instantiates any functions that
3729/// are required by this instantiation.
3730///
3731/// \param DefinitionRequired if true, then we are performing an explicit
3732/// instantiation where the body of the function is required. Complain if
3733/// there is no such body.
3734void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
3735 FunctionDecl *Function,
3736 bool Recursive,
3737 bool DefinitionRequired,
3738 bool AtEndOfTU) {
3739 if (Function->isInvalidDecl() || Function->isDefined())
3740 return;
3741
3742 // Never instantiate an explicit specialization except if it is a class scope
3743 // explicit specialization.
3744 TemplateSpecializationKind TSK = Function->getTemplateSpecializationKind();
3745 if (TSK == TSK_ExplicitSpecialization &&
3746 !Function->getClassScopeSpecializationPattern())
3747 return;
3748
3749 // Find the function body that we'll be substituting.
3750 const FunctionDecl *PatternDecl = Function->getTemplateInstantiationPattern();
3751 assert(PatternDecl && "instantiating a non-template")((PatternDecl && "instantiating a non-template") ? static_cast
<void> (0) : __assert_fail ("PatternDecl && \"instantiating a non-template\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3751, __PRETTY_FUNCTION__))
;
3752
3753 const FunctionDecl *PatternDef = PatternDecl->getDefinition();
3754 Stmt *Pattern = nullptr;
3755 if (PatternDef) {
3756 Pattern = PatternDef->getBody(PatternDef);
3757 PatternDecl = PatternDef;
3758 }
3759
3760 // FIXME: We need to track the instantiation stack in order to know which
3761 // definitions should be visible within this instantiation.
3762 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Function,
3763 Function->getInstantiatedFromMemberFunction(),
3764 PatternDecl, PatternDef, TSK,
3765 /*Complain*/DefinitionRequired)) {
3766 if (DefinitionRequired)
3767 Function->setInvalidDecl();
3768 else if (TSK == TSK_ExplicitInstantiationDefinition) {
3769 // Try again at the end of the translation unit (at which point a
3770 // definition will be required).
3771 assert(!Recursive)((!Recursive) ? static_cast<void> (0) : __assert_fail (
"!Recursive", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3771, __PRETTY_FUNCTION__))
;
3772 PendingInstantiations.push_back(
3773 std::make_pair(Function, PointOfInstantiation));
3774 } else if (TSK == TSK_ImplicitInstantiation) {
3775 if (AtEndOfTU && !getDiagnostics().hasErrorOccurred()) {
3776 Diag(PointOfInstantiation, diag::warn_func_template_missing)
3777 << Function;
3778 Diag(PatternDecl->getLocation(), diag::note_forward_template_decl);
3779 if (getLangOpts().CPlusPlus11)
3780 Diag(PointOfInstantiation, diag::note_inst_declaration_hint)
3781 << Function;
3782 }
3783 }
3784
3785 return;
3786 }
3787
3788 // Postpone late parsed template instantiations.
3789 if (PatternDecl->isLateTemplateParsed() &&
3790 !LateTemplateParser) {
3791 PendingInstantiations.push_back(
3792 std::make_pair(Function, PointOfInstantiation));
3793 return;
3794 }
3795
3796 // If we're performing recursive template instantiation, create our own
3797 // queue of pending implicit instantiations that we will instantiate later,
3798 // while we're still within our own instantiation context.
3799 // This has to happen before LateTemplateParser below is called, so that
3800 // it marks vtables used in late parsed templates as used.
3801 SavePendingLocalImplicitInstantiationsRAII
3802 SavedPendingLocalImplicitInstantiations(*this);
3803 SavePendingInstantiationsAndVTableUsesRAII
3804 SavePendingInstantiationsAndVTableUses(*this, /*Enabled=*/Recursive);
3805
3806 // Call the LateTemplateParser callback if there is a need to late parse
3807 // a templated function definition.
3808 if (!Pattern && PatternDecl->isLateTemplateParsed() &&
3809 LateTemplateParser) {
3810 // FIXME: Optimize to allow individual templates to be deserialized.
3811 if (PatternDecl->isFromASTFile())
3812 ExternalSource->ReadLateParsedTemplates(LateParsedTemplateMap);
3813
3814 auto LPTIter = LateParsedTemplateMap.find(PatternDecl);
3815 assert(LPTIter != LateParsedTemplateMap.end() &&((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate"
) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3816, __PRETTY_FUNCTION__))
3816 "missing LateParsedTemplate")((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate"
) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3816, __PRETTY_FUNCTION__))
;
3817 LateTemplateParser(OpaqueParser, *LPTIter->second);
3818 Pattern = PatternDecl->getBody(PatternDecl);
3819 }
3820
3821 // Note, we should never try to instantiate a deleted function template.
3822 assert((Pattern || PatternDecl->isDefaulted()) &&(((Pattern || PatternDecl->isDefaulted()) && "unexpected kind of function template definition"
) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted()) && \"unexpected kind of function template definition\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3823, __PRETTY_FUNCTION__))
3823 "unexpected kind of function template definition")(((Pattern || PatternDecl->isDefaulted()) && "unexpected kind of function template definition"
) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted()) && \"unexpected kind of function template definition\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3823, __PRETTY_FUNCTION__))
;
3824
3825 // C++1y [temp.explicit]p10:
3826 // Except for inline functions, declarations with types deduced from their
3827 // initializer or return value, and class template specializations, other
3828 // explicit instantiation declarations have the effect of suppressing the
3829 // implicit instantiation of the entity to which they refer.
3830 if (TSK == TSK_ExplicitInstantiationDeclaration &&
3831 !PatternDecl->isInlined() &&
3832 !PatternDecl->getReturnType()->getContainedAutoType())
3833 return;
3834
3835 if (PatternDecl->isInlined()) {
3836 // Function, and all later redeclarations of it (from imported modules,
3837 // for instance), are now implicitly inline.
3838 for (auto *D = Function->getMostRecentDecl(); /**/;
3839 D = D->getPreviousDecl()) {
3840 D->setImplicitlyInline();
3841 if (D == Function)
3842 break;
3843 }
3844 }
3845
3846 InstantiatingTemplate Inst(*this, PointOfInstantiation, Function);
3847 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
3848 return;
3849 PrettyDeclStackTraceEntry CrashInfo(*this, Function, SourceLocation(),
3850 "instantiating function definition");
3851
3852 // The instantiation is visible here, even if it was first declared in an
3853 // unimported module.
3854 Function->setHidden(false);
3855
3856 // Copy the inner loc start from the pattern.
3857 Function->setInnerLocStart(PatternDecl->getInnerLocStart());
3858
3859 EnterExpressionEvaluationContext EvalContext(
3860 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
3861
3862 // Introduce a new scope where local variable instantiations will be
3863 // recorded, unless we're actually a member function within a local
3864 // class, in which case we need to merge our results with the parent
3865 // scope (of the enclosing function).
3866 bool MergeWithParentScope = false;
3867 if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Function->getDeclContext()))
3868 MergeWithParentScope = Rec->isLocalClass();
3869
3870 LocalInstantiationScope Scope(*this, MergeWithParentScope);
3871
3872 if (PatternDecl->isDefaulted())
3873 SetDeclDefaulted(Function, PatternDecl->getLocation());
3874 else {
3875 MultiLevelTemplateArgumentList TemplateArgs =
3876 getTemplateInstantiationArgs(Function, nullptr, false, PatternDecl);
3877
3878 // Substitute into the qualifier; we can get a substitution failure here
3879 // through evil use of alias templates.
3880 // FIXME: Is CurContext correct for this? Should we go to the (instantiation
3881 // of the) lexical context of the pattern?
3882 SubstQualifier(*this, PatternDecl, Function, TemplateArgs);
3883
3884 ActOnStartOfFunctionDef(nullptr, Function);
3885
3886 // Enter the scope of this instantiation. We don't use
3887 // PushDeclContext because we don't have a scope.
3888 Sema::ContextRAII savedContext(*this, Function);
3889
3890 if (addInstantiatedParametersToScope(*this, Function, PatternDecl, Scope,
3891 TemplateArgs))
3892 return;
3893
3894 if (CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(Function)) {
3895 // If this is a constructor, instantiate the member initializers.
3896 InstantiateMemInitializers(Ctor, cast<CXXConstructorDecl>(PatternDecl),
3897 TemplateArgs);
3898
3899 // If this is an MS ABI dllexport default constructor, instantiate any
3900 // default arguments.
3901 if (Context.getTargetInfo().getCXXABI().isMicrosoft() &&
3902 Ctor->isDefaultConstructor()) {
3903 InstantiateDefaultCtorDefaultArgs(*this, Ctor);
3904 }
3905 }
3906
3907 // Instantiate the function body.
3908 StmtResult Body = SubstStmt(Pattern, TemplateArgs);
3909
3910 if (Body.isInvalid())
3911 Function->setInvalidDecl();
3912
3913 // FIXME: finishing the function body while in an expression evaluation
3914 // context seems wrong. Investigate more.
3915 ActOnFinishFunctionBody(Function, Body.get(),
3916 /*IsInstantiation=*/true);
3917
3918 PerformDependentDiagnostics(PatternDecl, TemplateArgs);
3919
3920 if (auto *Listener = getASTMutationListener())
3921 Listener->FunctionDefinitionInstantiated(Function);
3922
3923 savedContext.pop();
3924 }
3925
3926 DeclGroupRef DG(Function);
3927 Consumer.HandleTopLevelDecl(DG);
3928
3929 // This class may have local implicit instantiations that need to be
3930 // instantiation within this scope.
3931 PerformPendingInstantiations(/*LocalOnly=*/true);
3932 Scope.Exit();
3933
3934 if (Recursive) {
3935 // Define any pending vtables.
3936 DefineUsedVTables();
3937
3938 // Instantiate any pending implicit instantiations found during the
3939 // instantiation of this template.
3940 PerformPendingInstantiations();
3941
3942 // PendingInstantiations and VTableUses are restored through
3943 // SavePendingInstantiationsAndVTableUses's destructor.
3944 }
3945}
3946
3947VarTemplateSpecializationDecl *Sema::BuildVarTemplateInstantiation(
3948 VarTemplateDecl *VarTemplate, VarDecl *FromVar,
3949 const TemplateArgumentList &TemplateArgList,
3950 const TemplateArgumentListInfo &TemplateArgsInfo,
3951 SmallVectorImpl<TemplateArgument> &Converted,
3952 SourceLocation PointOfInstantiation, void *InsertPos,
3953 LateInstantiatedAttrVec *LateAttrs,
3954 LocalInstantiationScope *StartingScope) {
3955 if (FromVar->isInvalidDecl())
3956 return nullptr;
3957
3958 InstantiatingTemplate Inst(*this, PointOfInstantiation, FromVar);
3959 if (Inst.isInvalid())
3960 return nullptr;
3961
3962 MultiLevelTemplateArgumentList TemplateArgLists;
3963 TemplateArgLists.addOuterTemplateArguments(&TemplateArgList);
3964
3965 // Instantiate the first declaration of the variable template: for a partial
3966 // specialization of a static data member template, the first declaration may
3967 // or may not be the declaration in the class; if it's in the class, we want
3968 // to instantiate a member in the class (a declaration), and if it's outside,
3969 // we want to instantiate a definition.
3970 //
3971 // If we're instantiating an explicitly-specialized member template or member
3972 // partial specialization, don't do this. The member specialization completely
3973 // replaces the original declaration in this case.
3974 bool IsMemberSpec = false;
3975 if (VarTemplatePartialSpecializationDecl *PartialSpec =
3976 dyn_cast<VarTemplatePartialSpecializationDecl>(FromVar))
3977 IsMemberSpec = PartialSpec->isMemberSpecialization();
3978 else if (VarTemplateDecl *FromTemplate = FromVar->getDescribedVarTemplate())
3979 IsMemberSpec = FromTemplate->isMemberSpecialization();
3980 if (!IsMemberSpec)
3981 FromVar = FromVar->getFirstDecl();
3982
3983 MultiLevelTemplateArgumentList MultiLevelList(TemplateArgList);
3984 TemplateDeclInstantiator Instantiator(*this, FromVar->getDeclContext(),
3985 MultiLevelList);
3986
3987 // TODO: Set LateAttrs and StartingScope ...
3988
3989 return cast_or_null<VarTemplateSpecializationDecl>(
3990 Instantiator.VisitVarTemplateSpecializationDecl(
3991 VarTemplate, FromVar, InsertPos, TemplateArgsInfo, Converted));
3992}
3993
3994/// \brief Instantiates a variable template specialization by completing it
3995/// with appropriate type information and initializer.
3996VarTemplateSpecializationDecl *Sema::CompleteVarTemplateSpecializationDecl(
3997 VarTemplateSpecializationDecl *VarSpec, VarDecl *PatternDecl,
3998 const MultiLevelTemplateArgumentList &TemplateArgs) {
3999
4000 // Do substitution on the type of the declaration
4001 TypeSourceInfo *DI =
4002 SubstType(PatternDecl->getTypeSourceInfo(), TemplateArgs,
4003 PatternDecl->getTypeSpecStartLoc(), PatternDecl->getDeclName());
4004 if (!DI)
4005 return nullptr;
4006
4007 // Update the type of this variable template specialization.
4008 VarSpec->setType(DI->getType());
4009
4010 // Instantiate the initializer.
4011 InstantiateVariableInitializer(VarSpec, PatternDecl, TemplateArgs);
4012
4013 return VarSpec;
4014}
4015
4016/// BuildVariableInstantiation - Used after a new variable has been created.
4017/// Sets basic variable data and decides whether to postpone the
4018/// variable instantiation.
4019void Sema::BuildVariableInstantiation(
4020 VarDecl *NewVar, VarDecl *OldVar,
4021 const MultiLevelTemplateArgumentList &TemplateArgs,
4022 LateInstantiatedAttrVec *LateAttrs, DeclContext *Owner,
4023 LocalInstantiationScope *StartingScope,
4024 bool InstantiatingVarTemplate) {
4025
4026 // If we are instantiating a local extern declaration, the
4027 // instantiation belongs lexically to the containing function.
4028 // If we are instantiating a static data member defined
4029 // out-of-line, the instantiation will have the same lexical
4030 // context (which will be a namespace scope) as the template.
4031 if (OldVar->isLocalExternDecl()) {
4032 NewVar->setLocalExternDecl();
4033 NewVar->setLexicalDeclContext(Owner);
4034 } else if (OldVar->isOutOfLine())
4035 NewVar->setLexicalDeclContext(OldVar->getLexicalDeclContext());
4036 NewVar->setTSCSpec(OldVar->getTSCSpec());
4037 NewVar->setInitStyle(OldVar->getInitStyle());
4038 NewVar->setCXXForRangeDecl(OldVar->isCXXForRangeDecl());
4039 NewVar->setConstexpr(OldVar->isConstexpr());
4040 NewVar->setInitCapture(OldVar->isInitCapture());
4041 NewVar->setPreviousDeclInSameBlockScope(
4042 OldVar->isPreviousDeclInSameBlockScope());
4043 NewVar->setAccess(OldVar->getAccess());
4044
4045 if (!OldVar->isStaticDataMember()) {
4046 if (OldVar->isUsed(false))
4047 NewVar->setIsUsed();
4048 NewVar->setReferenced(OldVar->isReferenced());
4049 }
4050
4051 InstantiateAttrs(TemplateArgs, OldVar, NewVar, LateAttrs, StartingScope);
4052
4053 LookupResult Previous(
4054 *this, NewVar->getDeclName(), NewVar->getLocation(),
4055 NewVar->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage
4056 : Sema::LookupOrdinaryName,
4057 Sema::ForRedeclaration);
4058
4059 if (NewVar->isLocalExternDecl() && OldVar->getPreviousDecl() &&
4060 (!OldVar->getPreviousDecl()->getDeclContext()->isDependentContext() ||
4061 OldVar->getPreviousDecl()->getDeclContext()==OldVar->getDeclContext())) {
4062 // We have a previous declaration. Use that one, so we merge with the
4063 // right type.
4064 if (NamedDecl *NewPrev = FindInstantiatedDecl(
4065 NewVar->getLocation(), OldVar->getPreviousDecl(), TemplateArgs))
4066 Previous.addDecl(NewPrev);
4067 } else if (!isa<VarTemplateSpecializationDecl>(NewVar) &&
4068 OldVar->hasLinkage())
4069 LookupQualifiedName(Previous, NewVar->getDeclContext(), false);
4070 CheckVariableDeclaration(NewVar, Previous);
4071
4072 if (!InstantiatingVarTemplate) {
4073 NewVar->getLexicalDeclContext()->addHiddenDecl(NewVar);
4074 if (!NewVar->isLocalExternDecl() || !NewVar->getPreviousDecl())
4075 NewVar->getDeclContext()->makeDeclVisibleInContext(NewVar);
4076 }
4077
4078 if (!OldVar->isOutOfLine()) {
4079 if (NewVar->getDeclContext()->isFunctionOrMethod())
4080 CurrentInstantiationScope->InstantiatedLocal(OldVar, NewVar);
4081 }
4082
4083 // Link instantiations of static data members back to the template from
4084 // which they were instantiated.
4085 if (NewVar->isStaticDataMember() && !InstantiatingVarTemplate)
4086 NewVar->setInstantiationOfStaticDataMember(OldVar,
4087 TSK_ImplicitInstantiation);
4088
4089 // Forward the mangling number from the template to the instantiated decl.
4090 Context.setManglingNumber(NewVar, Context.getManglingNumber(OldVar));
4091 Context.setStaticLocalNumber(NewVar, Context.getStaticLocalNumber(OldVar));
4092
4093 // Delay instantiation of the initializer for variable templates or inline
4094 // static data members until a definition of the variable is needed. We need
4095 // it right away if the type contains 'auto'.
4096 if ((!isa<VarTemplateSpecializationDecl>(NewVar) &&
4097 !InstantiatingVarTemplate &&
4098 !(OldVar->isInline() && OldVar->isThisDeclarationADefinition())) ||
4099 NewVar->getType()->isUndeducedType())
4100 InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs);
4101
4102 // Diagnose unused local variables with dependent types, where the diagnostic
4103 // will have been deferred.
4104 if (!NewVar->isInvalidDecl() &&
4105 NewVar->getDeclContext()->isFunctionOrMethod() &&
4106 OldVar->getType()->isDependentType())
4107 DiagnoseUnusedDecl(NewVar);
4108}
4109
4110/// \brief Instantiate the initializer of a variable.
4111void Sema::InstantiateVariableInitializer(
4112 VarDecl *Var, VarDecl *OldVar,
4113 const MultiLevelTemplateArgumentList &TemplateArgs) {
4114 // We propagate the 'inline' flag with the initializer, because it
4115 // would otherwise imply that the variable is a definition for a
4116 // non-static data member.
4117 if (OldVar->isInlineSpecified())
4118 Var->setInlineSpecified();
4119 else if (OldVar->isInline())
4120 Var->setImplicitlyInline();
4121
4122 if (OldVar->getInit()) {
4123 if (Var->isStaticDataMember() && !OldVar->isOutOfLine())
4124 PushExpressionEvaluationContext(
4125 Sema::ExpressionEvaluationContext::ConstantEvaluated, OldVar);
4126 else
4127 PushExpressionEvaluationContext(
4128 Sema::ExpressionEvaluationContext::PotentiallyEvaluated, OldVar);
4129
4130 // Instantiate the initializer.
4131 ExprResult Init;
4132
4133 {
4134 ContextRAII SwitchContext(*this, Var->getDeclContext());
4135 Init = SubstInitializer(OldVar->getInit(), TemplateArgs,
4136 OldVar->getInitStyle() == VarDecl::CallInit);
4137 }
4138
4139 if (!Init.isInvalid()) {
4140 Expr *InitExpr = Init.get();
4141
4142 if (Var->hasAttr<DLLImportAttr>() &&
4143 (!InitExpr ||
4144 !InitExpr->isConstantInitializer(getASTContext(), false))) {
4145 // Do not dynamically initialize dllimport variables.
4146 } else if (InitExpr) {
4147 bool DirectInit = OldVar->isDirectInit();
4148 AddInitializerToDecl(Var, InitExpr, DirectInit);
4149 } else
4150 ActOnUninitializedDecl(Var);
4151 } else {
4152 // FIXME: Not too happy about invalidating the declaration
4153 // because of a bogus initializer.
4154 Var->setInvalidDecl();
4155 }
4156
4157 PopExpressionEvaluationContext();
4158 } else {
4159 if (Var->isStaticDataMember()) {
4160 if (!Var->isOutOfLine())
4161 return;
4162
4163 // If the declaration inside the class had an initializer, don't add
4164 // another one to the out-of-line definition.
4165 if (OldVar->getFirstDecl()->hasInit())
4166 return;
4167 }
4168
4169 // We'll add an initializer to a for-range declaration later.
4170 if (Var->isCXXForRangeDecl())
4171 return;
4172
4173 ActOnUninitializedDecl(Var);
4174 }
4175}
4176
4177/// \brief Instantiate the definition of the given variable from its
4178/// template.
4179///
4180/// \param PointOfInstantiation the point at which the instantiation was
4181/// required. Note that this is not precisely a "point of instantiation"
4182/// for the function, but it's close.
4183///
4184/// \param Var the already-instantiated declaration of a static member
4185/// variable of a class template specialization.
4186///
4187/// \param Recursive if true, recursively instantiates any functions that
4188/// are required by this instantiation.
4189///
4190/// \param DefinitionRequired if true, then we are performing an explicit
4191/// instantiation where an out-of-line definition of the member variable
4192/// is required. Complain if there is no such definition.
4193void Sema::InstantiateStaticDataMemberDefinition(
4194 SourceLocation PointOfInstantiation,
4195 VarDecl *Var,
4196 bool Recursive,
4197 bool DefinitionRequired) {
4198 InstantiateVariableDefinition(PointOfInstantiation, Var, Recursive,
4199 DefinitionRequired);
4200}
4201
4202void Sema::InstantiateVariableDefinition(SourceLocation PointOfInstantiation,
4203 VarDecl *Var, bool Recursive,
4204 bool DefinitionRequired, bool AtEndOfTU) {
4205 if (Var->isInvalidDecl())
1
Assuming the condition is false
2
Taking false branch
4206 return;
4207
4208 VarTemplateSpecializationDecl *VarSpec =
4209 dyn_cast<VarTemplateSpecializationDecl>(Var);
4210 VarDecl *PatternDecl = nullptr, *Def = nullptr;
4211 MultiLevelTemplateArgumentList TemplateArgs =
4212 getTemplateInstantiationArgs(Var);
4213
4214 if (VarSpec) {
3
Taking false branch
4215 // If this is a variable template specialization, make sure that it is
4216 // non-dependent, then find its instantiation pattern.
4217 bool InstantiationDependent = false;
4218 assert(!TemplateSpecializationType::anyDependentTemplateArguments(((!TemplateSpecializationType::anyDependentTemplateArguments(
VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? static_cast<void> (0) : __assert_fail
("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4221, __PRETTY_FUNCTION__))
4219 VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&((!TemplateSpecializationType::anyDependentTemplateArguments(
VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? static_cast<void> (0) : __assert_fail
("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4221, __PRETTY_FUNCTION__))
4220 "Only instantiate variable template specializations that are "((!TemplateSpecializationType::anyDependentTemplateArguments(
VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? static_cast<void> (0) : __assert_fail
("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4221, __PRETTY_FUNCTION__))
4221 "not type-dependent")((!TemplateSpecializationType::anyDependentTemplateArguments(
VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? static_cast<void> (0) : __assert_fail
("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4221, __PRETTY_FUNCTION__))
;
4222 (void)InstantiationDependent;
4223
4224 // Find the variable initialization that we'll be substituting. If the
4225 // pattern was instantiated from a member template, look back further to
4226 // find the real pattern.
4227 assert(VarSpec->getSpecializedTemplate() &&((VarSpec->getSpecializedTemplate() && "Specialization without specialized template?"
) ? static_cast<void> (0) : __assert_fail ("VarSpec->getSpecializedTemplate() && \"Specialization without specialized template?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4228, __PRETTY_FUNCTION__))
4228 "Specialization without specialized template?")((VarSpec->getSpecializedTemplate() && "Specialization without specialized template?"
) ? static_cast<void> (0) : __assert_fail ("VarSpec->getSpecializedTemplate() && \"Specialization without specialized template?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4228, __PRETTY_FUNCTION__))
;
4229 llvm::PointerUnion<VarTemplateDecl *,
4230 VarTemplatePartialSpecializationDecl *> PatternPtr =
4231 VarSpec->getSpecializedTemplateOrPartial();
4232 if (PatternPtr.is<VarTemplatePartialSpecializationDecl *>()) {
4233 VarTemplatePartialSpecializationDecl *Tmpl =
4234 PatternPtr.get<VarTemplatePartialSpecializationDecl *>();
4235 while (VarTemplatePartialSpecializationDecl *From =
4236 Tmpl->getInstantiatedFromMember()) {
4237 if (Tmpl->isMemberSpecialization())
4238 break;
4239
4240 Tmpl = From;
4241 }
4242 PatternDecl = Tmpl;
4243 } else {
4244 VarTemplateDecl *Tmpl = PatternPtr.get<VarTemplateDecl *>();
4245 while (VarTemplateDecl *From =
4246 Tmpl->getInstantiatedFromMemberTemplate()) {
4247 if (Tmpl->isMemberSpecialization())
4248 break;
4249
4250 Tmpl = From;
4251 }
4252 PatternDecl = Tmpl->getTemplatedDecl();
4253 }
4254
4255 // If this is a static data member template, there might be an
4256 // uninstantiated initializer on the declaration. If so, instantiate
4257 // it now.
4258 if (PatternDecl->isStaticDataMember() &&
4259 (PatternDecl = PatternDecl->getFirstDecl())->hasInit() &&
4260 !Var->hasInit()) {
4261 // FIXME: Factor out the duplicated instantiation context setup/tear down
4262 // code here.
4263 InstantiatingTemplate Inst(*this, PointOfInstantiation, Var);
4264 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
4265 return;
4266 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
4267 "instantiating variable initializer");
4268
4269 // The instantiation is visible here, even if it was first declared in an
4270 // unimported module.
4271 Var->setHidden(false);
4272
4273 // If we're performing recursive template instantiation, create our own
4274 // queue of pending implicit instantiations that we will instantiate
4275 // later, while we're still within our own instantiation context.
4276 SavePendingInstantiationsAndVTableUsesRAII
4277 SavePendingInstantiationsAndVTableUses(*this, /*Enabled=*/Recursive);
4278
4279 LocalInstantiationScope Local(*this);
4280
4281 // Enter the scope of this instantiation. We don't use
4282 // PushDeclContext because we don't have a scope.
4283 ContextRAII PreviousContext(*this, Var->getDeclContext());
4284 InstantiateVariableInitializer(Var, PatternDecl, TemplateArgs);
4285 PreviousContext.pop();
4286
4287 // FIXME: Need to inform the ASTConsumer that we instantiated the
4288 // initializer?
4289
4290 // This variable may have local implicit instantiations that need to be
4291 // instantiated within this scope.
4292 PerformPendingInstantiations(/*LocalOnly=*/true);
4293
4294 Local.Exit();
4295
4296 if (Recursive) {
4297 // Define any newly required vtables.
4298 DefineUsedVTables();
4299
4300 // Instantiate any pending implicit instantiations found during the
4301 // instantiation of this template.
4302 PerformPendingInstantiations();
4303
4304 // PendingInstantiations and VTableUses are restored through
4305 // SavePendingInstantiationsAndVTableUses's destructor.
4306 }
4307 }
4308
4309 // Find actual definition
4310 Def = PatternDecl->getDefinition(getASTContext());
4311 } else {
4312 // If this is a static data member, find its out-of-line definition.
4313 assert(Var->isStaticDataMember() && "not a static data member?")((Var->isStaticDataMember() && "not a static data member?"
) ? static_cast<void> (0) : __assert_fail ("Var->isStaticDataMember() && \"not a static data member?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4313, __PRETTY_FUNCTION__))
;
4314 PatternDecl = Var->getInstantiatedFromStaticDataMember();
4315
4316 assert(PatternDecl && "data member was not instantiated from a template?")((PatternDecl && "data member was not instantiated from a template?"
) ? static_cast<void> (0) : __assert_fail ("PatternDecl && \"data member was not instantiated from a template?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4316, __PRETTY_FUNCTION__))
;
4317 assert(PatternDecl->isStaticDataMember() && "not a static data member?")((PatternDecl->isStaticDataMember() && "not a static data member?"
) ? static_cast<void> (0) : __assert_fail ("PatternDecl->isStaticDataMember() && \"not a static data member?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4317, __PRETTY_FUNCTION__))
;
4318 Def = PatternDecl->getDefinition();
4
Calling 'VarDecl::getDefinition'
5
Returning from 'VarDecl::getDefinition'
6
Value assigned to 'Def'
4319 }
4320
4321 TemplateSpecializationKind TSK = Var->getTemplateSpecializationKind();
4322
4323 // If we don't have a definition of the variable template, we won't perform
4324 // any instantiation. Rather, we rely on the user to instantiate this
4325 // definition (or provide a specialization for it) in another translation
4326 // unit.
4327 if (!Def && !DefinitionRequired) {
7
Assuming 'Def' is null
8
Assuming 'DefinitionRequired' is not equal to 0
9
Taking false branch
4328 if (TSK == TSK_ExplicitInstantiationDefinition) {
4329 PendingInstantiations.push_back(
4330 std::make_pair(Var, PointOfInstantiation));
4331 } else if (TSK == TSK_ImplicitInstantiation) {
4332 // Warn about missing definition at the end of translation unit.
4333 if (AtEndOfTU && !getDiagnostics().hasErrorOccurred()) {
4334 Diag(PointOfInstantiation, diag::warn_var_template_missing)
4335 << Var;
4336 Diag(PatternDecl->getLocation(), diag::note_forward_template_decl);
4337 if (getLangOpts().CPlusPlus11)
4338 Diag(PointOfInstantiation, diag::note_inst_declaration_hint) << Var;
4339 }
4340 return;
4341 }
4342
4343 }
4344
4345 // FIXME: We need to track the instantiation stack in order to know which
4346 // definitions should be visible within this instantiation.
4347 // FIXME: Produce diagnostics when Var->getInstantiatedFromStaticDataMember().
4348 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Var,
10
Assuming the condition is false
11
Taking false branch
4349 /*InstantiatedFromMember*/false,
4350 PatternDecl, Def, TSK,
4351 /*Complain*/DefinitionRequired))
4352 return;
4353
4354
4355 // Never instantiate an explicit specialization.
4356 if (TSK == TSK_ExplicitSpecialization)
12
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
13
Taking false branch
4357 return;
4358
4359 // C++11 [temp.explicit]p10:
4360 // Except for inline functions, [...] explicit instantiation declarations
4361 // have the effect of suppressing the implicit instantiation of the entity
4362 // to which they refer.
4363 if (TSK == TSK_ExplicitInstantiationDeclaration)
14
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
15
Taking false branch
4364 return;
4365
4366 // Make sure to pass the instantiated variable to the consumer at the end.
4367 struct PassToConsumerRAII {
4368 ASTConsumer &Consumer;
4369 VarDecl *Var;
4370
4371 PassToConsumerRAII(ASTConsumer &Consumer, VarDecl *Var)
4372 : Consumer(Consumer), Var(Var) { }
4373
4374 ~PassToConsumerRAII() {
4375 Consumer.HandleCXXStaticMemberVarInstantiation(Var);
4376 }
4377 } PassToConsumerRAII(Consumer, Var);
4378
4379 // If we already have a definition, we're done.
4380 if (VarDecl *Def = Var->getDefinition()) {
16
Assuming 'Def' is null
17
Taking false branch
4381 // We may be explicitly instantiating something we've already implicitly
4382 // instantiated.
4383 Def->setTemplateSpecializationKind(Var->getTemplateSpecializationKind(),
4384 PointOfInstantiation);
4385 return;
4386 }
4387
4388 InstantiatingTemplate Inst(*this, PointOfInstantiation, Var);
4389 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
18
Assuming the condition is false
19
Assuming the condition is false
20
Taking false branch
4390 return;
4391 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
4392 "instantiating variable definition");
4393
4394 // If we're performing recursive template instantiation, create our own
4395 // queue of pending implicit instantiations that we will instantiate later,
4396 // while we're still within our own instantiation context.
4397 SavePendingLocalImplicitInstantiationsRAII
4398 SavedPendingLocalImplicitInstantiations(*this);
4399 SavePendingInstantiationsAndVTableUsesRAII
4400 SavePendingInstantiationsAndVTableUses(*this, /*Enabled=*/Recursive);
4401
4402 // Enter the scope of this instantiation. We don't use
4403 // PushDeclContext because we don't have a scope.
4404 ContextRAII PreviousContext(*this, Var->getDeclContext());
4405 LocalInstantiationScope Local(*this);
4406
4407 VarDecl *OldVar = Var;
4408 if (Def->isStaticDataMember() && !Def->isOutOfLine()) {
21
Called C++ object pointer is null
4409 // We're instantiating an inline static data member whose definition was
4410 // provided inside the class.
4411 // FIXME: Update record?
4412 InstantiateVariableInitializer(Var, Def, TemplateArgs);
4413 } else if (!VarSpec) {
4414 Var = cast_or_null<VarDecl>(SubstDecl(Def, Var->getDeclContext(),
4415 TemplateArgs));
4416 } else if (Var->isStaticDataMember() &&
4417 Var->getLexicalDeclContext()->isRecord()) {
4418 // We need to instantiate the definition of a static data member template,
4419 // and all we have is the in-class declaration of it. Instantiate a separate
4420 // declaration of the definition.
4421 TemplateDeclInstantiator Instantiator(*this, Var->getDeclContext(),
4422 TemplateArgs);
4423 Var = cast_or_null<VarDecl>(Instantiator.VisitVarTemplateSpecializationDecl(
4424 VarSpec->getSpecializedTemplate(), Def, nullptr,
4425 VarSpec->getTemplateArgsInfo(), VarSpec->getTemplateArgs().asArray()));
4426 if (Var) {
4427 llvm::PointerUnion<VarTemplateDecl *,
4428 VarTemplatePartialSpecializationDecl *> PatternPtr =
4429 VarSpec->getSpecializedTemplateOrPartial();
4430 if (VarTemplatePartialSpecializationDecl *Partial =
4431 PatternPtr.dyn_cast<VarTemplatePartialSpecializationDecl *>())
4432 cast<VarTemplateSpecializationDecl>(Var)->setInstantiationOf(
4433 Partial, &VarSpec->getTemplateInstantiationArgs());
4434
4435 // Merge the definition with the declaration.
4436 LookupResult R(*this, Var->getDeclName(), Var->getLocation(),
4437 LookupOrdinaryName, ForRedeclaration);
4438 R.addDecl(OldVar);
4439 MergeVarDecl(Var, R);
4440
4441 // Attach the initializer.
4442 InstantiateVariableInitializer(Var, Def, TemplateArgs);
4443 }
4444 } else
4445 // Complete the existing variable's definition with an appropriately
4446 // substituted type and initializer.
4447 Var = CompleteVarTemplateSpecializationDecl(VarSpec, Def, TemplateArgs);
4448
4449 PreviousContext.pop();
4450
4451 if (Var) {
4452 PassToConsumerRAII.Var = Var;
4453 Var->setTemplateSpecializationKind(OldVar->getTemplateSpecializationKind(),
4454 OldVar->getPointOfInstantiation());
4455 }
4456
4457 // This variable may have local implicit instantiations that need to be
4458 // instantiated within this scope.
4459 PerformPendingInstantiations(/*LocalOnly=*/true);
4460
4461 Local.Exit();
4462
4463 if (Recursive) {
4464 // Define any newly required vtables.
4465 DefineUsedVTables();
4466
4467 // Instantiate any pending implicit instantiations found during the
4468 // instantiation of this template.
4469 PerformPendingInstantiations();
4470
4471 // PendingInstantiations and VTableUses are restored through
4472 // SavePendingInstantiationsAndVTableUses's destructor.
4473 }
4474}
4475
4476void
4477Sema::InstantiateMemInitializers(CXXConstructorDecl *New,
4478 const CXXConstructorDecl *Tmpl,
4479 const MultiLevelTemplateArgumentList &TemplateArgs) {
4480
4481 SmallVector<CXXCtorInitializer*, 4> NewInits;
4482 bool AnyErrors = Tmpl->isInvalidDecl();
4483
4484 // Instantiate all the initializers.
4485 for (const auto *Init : Tmpl->inits()) {
4486 // Only instantiate written initializers, let Sema re-construct implicit
4487 // ones.
4488 if (!Init->isWritten())
4489 continue;
4490
4491 SourceLocation EllipsisLoc;
4492
4493 if (Init->isPackExpansion()) {
4494 // This is a pack expansion. We should expand it now.
4495 TypeLoc BaseTL = Init->getTypeSourceInfo()->getTypeLoc();
4496 SmallVector<UnexpandedParameterPack, 4> Unexpanded;
4497 collectUnexpandedParameterPacks(BaseTL, Unexpanded);
4498 collectUnexpandedParameterPacks(Init->getInit(), Unexpanded);
4499 bool ShouldExpand = false;
4500 bool RetainExpansion = false;
4501 Optional<unsigned> NumExpansions;
4502 if (CheckParameterPacksForExpansion(Init->getEllipsisLoc(),
4503 BaseTL.getSourceRange(),
4504 Unexpanded,
4505 TemplateArgs, ShouldExpand,
4506 RetainExpansion,
4507 NumExpansions)) {
4508 AnyErrors = true;
4509 New->setInvalidDecl();
4510 continue;
4511 }
4512 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?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4512, __PRETTY_FUNCTION__))
;
4513
4514 // Loop over all of the arguments in the argument pack(s),
4515 for (unsigned I = 0; I != *NumExpansions; ++I) {
4516 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I);
4517
4518 // Instantiate the initializer.
4519 ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
4520 /*CXXDirectInit=*/true);
4521 if (TempInit.isInvalid()) {
4522 AnyErrors = true;
4523 break;
4524 }
4525
4526 // Instantiate the base type.
4527 TypeSourceInfo *BaseTInfo = SubstType(Init->getTypeSourceInfo(),
4528 TemplateArgs,
4529 Init->getSourceLocation(),
4530 New->getDeclName());
4531 if (!BaseTInfo) {
4532 AnyErrors = true;
4533 break;
4534 }
4535
4536 // Build the initializer.
4537 MemInitResult NewInit = BuildBaseInitializer(BaseTInfo->getType(),
4538 BaseTInfo, TempInit.get(),
4539 New->getParent(),
4540 SourceLocation());
4541 if (NewInit.isInvalid()) {
4542 AnyErrors = true;
4543 break;
4544 }
4545
4546 NewInits.push_back(NewInit.get());
4547 }
4548
4549 continue;
4550 }
4551
4552 // Instantiate the initializer.
4553 ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
4554 /*CXXDirectInit=*/true);
4555 if (TempInit.isInvalid()) {
4556 AnyErrors = true;
4557 continue;
4558 }
4559
4560 MemInitResult NewInit;
4561 if (Init->isDelegatingInitializer() || Init->isBaseInitializer()) {
4562 TypeSourceInfo *TInfo = SubstType(Init->getTypeSourceInfo(),
4563 TemplateArgs,
4564 Init->getSourceLocation(),
4565 New->getDeclName());
4566 if (!TInfo) {
4567 AnyErrors = true;
4568 New->setInvalidDecl();
4569 continue;
4570 }
4571
4572 if (Init->isBaseInitializer())
4573 NewInit = BuildBaseInitializer(TInfo->getType(), TInfo, TempInit.get(),
4574 New->getParent(), EllipsisLoc);
4575 else
4576 NewInit = BuildDelegatingInitializer(TInfo, TempInit.get(),
4577 cast<CXXRecordDecl>(CurContext->getParent()));
4578 } else if (Init->isMemberInitializer()) {
4579 FieldDecl *Member = cast_or_null<FieldDecl>(FindInstantiatedDecl(
4580 Init->getMemberLocation(),
4581 Init->getMember(),
4582 TemplateArgs));
4583 if (!Member) {
4584 AnyErrors = true;
4585 New->setInvalidDecl();
4586 continue;
4587 }
4588
4589 NewInit = BuildMemberInitializer(Member, TempInit.get(),
4590 Init->getSourceLocation());
4591 } else if (Init->isIndirectMemberInitializer()) {
4592 IndirectFieldDecl *IndirectMember =
4593 cast_or_null<IndirectFieldDecl>(FindInstantiatedDecl(
4594 Init->getMemberLocation(),
4595 Init->getIndirectMember(), TemplateArgs));
4596
4597 if (!IndirectMember) {
4598 AnyErrors = true;
4599 New->setInvalidDecl();
4600 continue;
4601 }
4602
4603 NewInit = BuildMemberInitializer(IndirectMember, TempInit.get(),
4604 Init->getSourceLocation());
4605 }
4606
4607 if (NewInit.isInvalid()) {
4608 AnyErrors = true;
4609 New->setInvalidDecl();
4610 } else {
4611 NewInits.push_back(NewInit.get());
4612 }
4613 }
4614
4615 // Assign all the initializers to the new constructor.
4616 ActOnMemInitializers(New,
4617 /*FIXME: ColonLoc */
4618 SourceLocation(),
4619 NewInits,
4620 AnyErrors);
4621}
4622
4623// TODO: this could be templated if the various decl types used the
4624// same method name.
4625static bool isInstantiationOf(ClassTemplateDecl *Pattern,
4626 ClassTemplateDecl *Instance) {
4627 Pattern = Pattern->getCanonicalDecl();
4628
4629 do {
4630 Instance = Instance->getCanonicalDecl();
4631 if (Pattern == Instance) return true;
4632 Instance = Instance->getInstantiatedFromMemberTemplate();
4633 } while (Instance);
4634
4635 return false;
4636}
4637
4638static bool isInstantiationOf(FunctionTemplateDecl *Pattern,
4639 FunctionTemplateDecl *Instance) {
4640 Pattern = Pattern->getCanonicalDecl();
4641
4642 do {
4643 Instance = Instance->getCanonicalDecl();
4644 if (Pattern == Instance) return true;
4645 Instance = Instance->getInstantiatedFromMemberTemplate();
4646 } while (Instance);
4647
4648 return false;
4649}
4650
4651static bool
4652isInstantiationOf(ClassTemplatePartialSpecializationDecl *Pattern,
4653 ClassTemplatePartialSpecializationDecl *Instance) {
4654 Pattern
4655 = cast<ClassTemplatePartialSpecializationDecl>(Pattern->getCanonicalDecl());
4656 do {
4657 Instance = cast<ClassTemplatePartialSpecializationDecl>(
4658 Instance->getCanonicalDecl());
4659 if (Pattern == Instance)
4660 return true;
4661 Instance = Instance->getInstantiatedFromMember();
4662 } while (Instance);
4663
4664 return false;
4665}
4666
4667static bool isInstantiationOf(CXXRecordDecl *Pattern,
4668 CXXRecordDecl *Instance) {
4669 Pattern = Pattern->getCanonicalDecl();
4670
4671 do {
4672 Instance = Instance->getCanonicalDecl();
4673 if (Pattern == Instance) return true;
4674 Instance = Instance->getInstantiatedFromMemberClass();
4675 } while (Instance);
4676
4677 return false;
4678}
4679
4680static bool isInstantiationOf(FunctionDecl *Pattern,
4681 FunctionDecl *Instance) {
4682 Pattern = Pattern->getCanonicalDecl();
4683
4684 do {
4685 Instance = Instance->getCanonicalDecl();
4686 if (Pattern == Instance) return true;
4687 Instance = Instance->getInstantiatedFromMemberFunction();
4688 } while (Instance);
4689
4690 return false;
4691}
4692
4693static bool isInstantiationOf(EnumDecl *Pattern,
4694 EnumDecl *Instance) {
4695 Pattern = Pattern->getCanonicalDecl();
4696
4697 do {
4698 Instance = Instance->getCanonicalDecl();
4699 if (Pattern == Instance) return true;
4700 Instance = Instance->getInstantiatedFromMemberEnum();
4701 } while (Instance);
4702
4703 return false;
4704}
4705
4706static bool isInstantiationOf(UsingShadowDecl *Pattern,
4707 UsingShadowDecl *Instance,
4708 ASTContext &C) {
4709 return declaresSameEntity(C.getInstantiatedFromUsingShadowDecl(Instance),
4710 Pattern);
4711}
4712
4713static bool isInstantiationOf(UsingDecl *Pattern, UsingDecl *Instance,
4714 ASTContext &C) {
4715 return declaresSameEntity(C.getInstantiatedFromUsingDecl(Instance), Pattern);
4716}
4717
4718template<typename T>
4719static bool isInstantiationOfUnresolvedUsingDecl(T *Pattern, Decl *Other,
4720 ASTContext &Ctx) {
4721 // An unresolved using declaration can instantiate to an unresolved using
4722 // declaration, or to a using declaration or a using declaration pack.
4723 //
4724 // Multiple declarations can claim to be instantiated from an unresolved
4725 // using declaration if it's a pack expansion. We want the UsingPackDecl
4726 // in that case, not the individual UsingDecls within the pack.
4727 bool OtherIsPackExpansion;
4728 NamedDecl *OtherFrom;
4729 if (auto *OtherUUD = dyn_cast<T>(Other)) {
4730 OtherIsPackExpansion = OtherUUD->isPackExpansion();
4731 OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUUD);
4732 } else if (auto *OtherUPD = dyn_cast<UsingPackDecl>(Other)) {
4733 OtherIsPackExpansion = true;
4734 OtherFrom = OtherUPD->getInstantiatedFromUsingDecl();
4735 } else if (auto *OtherUD = dyn_cast<UsingDecl>(Other)) {
4736 OtherIsPackExpansion = false;
4737 OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUD);
4738 } else {
4739 return false;
4740 }
4741 return Pattern->isPackExpansion() == OtherIsPackExpansion &&
4742 declaresSameEntity(OtherFrom, Pattern);
4743}
4744
4745static bool isInstantiationOfStaticDataMember(VarDecl *Pattern,
4746 VarDecl *Instance) {
4747 assert(Instance->isStaticDataMember())((Instance->isStaticDataMember()) ? static_cast<void>
(0) : __assert_fail ("Instance->isStaticDataMember()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4747, __PRETTY_FUNCTION__))
;
4748
4749 Pattern = Pattern->getCanonicalDecl();
4750
4751 do {
4752 Instance = Instance->getCanonicalDecl();
4753 if (Pattern == Instance) return true;
4754 Instance = Instance->getInstantiatedFromStaticDataMember();
4755 } while (Instance);
4756
4757 return false;
4758}
4759
4760// Other is the prospective instantiation
4761// D is the prospective pattern
4762static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) {
4763 if (auto *UUD = dyn_cast<UnresolvedUsingTypenameDecl>(D))
4764 return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx);
4765
4766 if (auto *UUD = dyn_cast<UnresolvedUsingValueDecl>(D))
4767 return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx);
4768
4769 if (D->getKind() != Other->getKind())
4770 return false;
4771
4772 if (auto *Record = dyn_cast<CXXRecordDecl>(Other))
4773 return isInstantiationOf(cast<CXXRecordDecl>(D), Record);
4774
4775 if (auto *Function = dyn_cast<FunctionDecl>(Other))
4776 return isInstantiationOf(cast<FunctionDecl>(D), Function);
4777
4778 if (auto *Enum = dyn_cast<EnumDecl>(Other))
4779 return isInstantiationOf(cast<EnumDecl>(D), Enum);
4780
4781 if (auto *Var = dyn_cast<VarDecl>(Other))
4782 if (Var->isStaticDataMember())
4783 return isInstantiationOfStaticDataMember(cast<VarDecl>(D), Var);
4784
4785 if (auto *Temp = dyn_cast<ClassTemplateDecl>(Other))
4786 return isInstantiationOf(cast<ClassTemplateDecl>(D), Temp);
4787
4788 if (auto *Temp = dyn_cast<FunctionTemplateDecl>(Other))
4789 return isInstantiationOf(cast<FunctionTemplateDecl>(D), Temp);
4790
4791 if (auto *PartialSpec =
4792 dyn_cast<ClassTemplatePartialSpecializationDecl>(Other))
4793 return isInstantiationOf(cast<ClassTemplatePartialSpecializationDecl>(D),
4794 PartialSpec);
4795
4796 if (auto *Field = dyn_cast<FieldDecl>(Other)) {
4797 if (!Field->getDeclName()) {
4798 // This is an unnamed field.
4799 return declaresSameEntity(Ctx.getInstantiatedFromUnnamedFieldDecl(Field),
4800 cast<FieldDecl>(D));
4801 }
4802 }
4803
4804 if (auto *Using = dyn_cast<UsingDecl>(Other))
4805 return isInstantiationOf(cast<UsingDecl>(D), Using, Ctx);
4806
4807 if (auto *Shadow = dyn_cast<UsingShadowDecl>(Other))
4808 return isInstantiationOf(cast<UsingShadowDecl>(D), Shadow, Ctx);
4809
4810 return D->getDeclName() &&
4811 D->getDeclName() == cast<NamedDecl>(Other)->getDeclName();
4812}
4813
4814template<typename ForwardIterator>
4815static NamedDecl *findInstantiationOf(ASTContext &Ctx,
4816 NamedDecl *D,
4817 ForwardIterator first,
4818 ForwardIterator last) {
4819 for (; first != last; ++first)
4820 if (isInstantiationOf(Ctx, D, *first))
4821 return cast<NamedDecl>(*first);
4822
4823 return nullptr;
4824}
4825
4826/// \brief Finds the instantiation of the given declaration context
4827/// within the current instantiation.
4828///
4829/// \returns NULL if there was an error
4830DeclContext *Sema::FindInstantiatedContext(SourceLocation Loc, DeclContext* DC,
4831 const MultiLevelTemplateArgumentList &TemplateArgs) {
4832 if (NamedDecl *D = dyn_cast<NamedDecl>(DC)) {
4833 Decl* ID = FindInstantiatedDecl(Loc, D, TemplateArgs);
4834 return cast_or_null<DeclContext>(ID);
4835 } else return DC;
4836}
4837
4838/// \brief Find the instantiation of the given declaration within the
4839/// current instantiation.
4840///
4841/// This routine is intended to be used when \p D is a declaration
4842/// referenced from within a template, that needs to mapped into the
4843/// corresponding declaration within an instantiation. For example,
4844/// given:
4845///
4846/// \code
4847/// template<typename T>
4848/// struct X {
4849/// enum Kind {
4850/// KnownValue = sizeof(T)
4851/// };
4852///
4853/// bool getKind() const { return KnownValue; }
4854/// };
4855///
4856/// template struct X<int>;
4857/// \endcode
4858///
4859/// In the instantiation of <tt>X<int>::getKind()</tt>, we need to map the
4860/// \p EnumConstantDecl for \p KnownValue (which refers to
4861/// <tt>X<T>::<Kind>::KnownValue</tt>) to its instantiation
4862/// (<tt>X<int>::<Kind>::KnownValue</tt>). \p FindInstantiatedDecl performs
4863/// this mapping from within the instantiation of <tt>X<int></tt>.
4864NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
4865 const MultiLevelTemplateArgumentList &TemplateArgs) {
4866 DeclContext *ParentDC = D->getDeclContext();
4867 // FIXME: Parmeters of pointer to functions (y below) that are themselves
4868 // parameters (p below) can have their ParentDC set to the translation-unit
4869 // - thus we can not consistently check if the ParentDC of such a parameter
4870 // is Dependent or/and a FunctionOrMethod.
4871 // For e.g. this code, during Template argument deduction tries to
4872 // find an instantiated decl for (T y) when the ParentDC for y is
4873 // the translation unit.
4874 // e.g. template <class T> void Foo(auto (*p)(T y) -> decltype(y())) {}
4875 // float baz(float(*)()) { return 0.0; }
4876 // Foo(baz);
4877 // The better fix here is perhaps to ensure that a ParmVarDecl, by the time
4878 // it gets here, always has a FunctionOrMethod as its ParentDC??
4879 // For now:
4880 // - as long as we have a ParmVarDecl whose parent is non-dependent and
4881 // whose type is not instantiation dependent, do nothing to the decl
4882 // - otherwise find its instantiated decl.
4883 if (isa<ParmVarDecl>(D) && !ParentDC->isDependentContext() &&
4884 !cast<ParmVarDecl>(D)->getType()->isInstantiationDependentType())
4885 return D;
4886 if (isa<ParmVarDecl>(D) || isa<NonTypeTemplateParmDecl>(D) ||
4887 isa<TemplateTypeParmDecl>(D) || isa<TemplateTemplateParmDecl>(D) ||
4888 (ParentDC->isFunctionOrMethod() && ParentDC->isDependentContext()) ||
4889 (isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda())) {
4890 // D is a local of some kind. Look into the map of local
4891 // declarations to their instantiations.
4892 if (CurrentInstantiationScope) {
4893 if (auto Found = CurrentInstantiationScope->findInstantiationOf(D)) {
4894 if (Decl *FD = Found->dyn_cast<Decl *>())
4895 return cast<NamedDecl>(FD);
4896
4897 int PackIdx = ArgumentPackSubstitutionIndex;
4898 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4899, __PRETTY_FUNCTION__))
4899 "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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4899, __PRETTY_FUNCTION__))
;
4900 typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
4901 return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]);
4902 }
4903 }
4904
4905 // If we're performing a partial substitution during template argument
4906 // deduction, we may not have values for template parameters yet. They
4907 // just map to themselves.
4908 if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
4909 isa<TemplateTemplateParmDecl>(D))
4910 return D;
4911
4912 if (D->isInvalidDecl())
4913 return nullptr;
4914
4915 // Normally this function only searches for already instantiated declaration
4916 // however we have to make an exclusion for local types used before
4917 // definition as in the code:
4918 //
4919 // template<typename T> void f1() {
4920 // void g1(struct x1);
4921 // struct x1 {};
4922 // }
4923 //
4924 // In this case instantiation of the type of 'g1' requires definition of
4925 // 'x1', which is defined later. Error recovery may produce an enum used
4926 // before definition. In these cases we need to instantiate relevant
4927 // declarations here.
4928 bool NeedInstantiate = false;
4929 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D))
4930 NeedInstantiate = RD->isLocalClass();
4931 else
4932 NeedInstantiate = isa<EnumDecl>(D);
4933 if (NeedInstantiate) {
4934 Decl *Inst = SubstDecl(D, CurContext, TemplateArgs);
4935 CurrentInstantiationScope->InstantiatedLocal(D, Inst);
4936 return cast<TypeDecl>(Inst);
4937 }
4938
4939 // If we didn't find the decl, then we must have a label decl that hasn't
4940 // been found yet. Lazily instantiate it and return it now.
4941 assert(isa<LabelDecl>(D))((isa<LabelDecl>(D)) ? static_cast<void> (0) : __assert_fail
("isa<LabelDecl>(D)", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4941, __PRETTY_FUNCTION__))
;
4942
4943 Decl *Inst = SubstDecl(D, CurContext, TemplateArgs);
4944 assert(Inst && "Failed to instantiate label??")((Inst && "Failed to instantiate label??") ? static_cast
<void> (0) : __assert_fail ("Inst && \"Failed to instantiate label??\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4944, __PRETTY_FUNCTION__))
;
4945
4946 CurrentInstantiationScope->InstantiatedLocal(D, Inst);
4947 return cast<LabelDecl>(Inst);
4948 }
4949
4950 // For variable template specializations, update those that are still
4951 // type-dependent.
4952 if (VarTemplateSpecializationDecl *VarSpec =
4953 dyn_cast<VarTemplateSpecializationDecl>(D)) {
4954 bool InstantiationDependent = false;
4955 const TemplateArgumentListInfo &VarTemplateArgs =
4956 VarSpec->getTemplateArgsInfo();
4957 if (TemplateSpecializationType::anyDependentTemplateArguments(
4958 VarTemplateArgs, InstantiationDependent))
4959 D = cast<NamedDecl>(
4960 SubstDecl(D, VarSpec->getDeclContext(), TemplateArgs));
4961 return D;
4962 }
4963
4964 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
4965 if (!Record->isDependentContext())
4966 return D;
4967
4968 // Determine whether this record is the "templated" declaration describing
4969 // a class template or class template partial specialization.
4970 ClassTemplateDecl *ClassTemplate = Record->getDescribedClassTemplate();
4971 if (ClassTemplate)
4972 ClassTemplate = ClassTemplate->getCanonicalDecl();
4973 else if (ClassTemplatePartialSpecializationDecl *PartialSpec
4974 = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record))
4975 ClassTemplate = PartialSpec->getSpecializedTemplate()->getCanonicalDecl();
4976
4977 // Walk the current context to find either the record or an instantiation of
4978 // it.
4979 DeclContext *DC = CurContext;
4980 while (!DC->isFileContext()) {
4981 // If we're performing substitution while we're inside the template
4982 // definition, we'll find our own context. We're done.
4983 if (DC->Equals(Record))
4984 return Record;
4985
4986 if (CXXRecordDecl *InstRecord = dyn_cast<CXXRecordDecl>(DC)) {
4987 // Check whether we're in the process of instantiating a class template
4988 // specialization of the template we're mapping.
4989 if (ClassTemplateSpecializationDecl *InstSpec
4990 = dyn_cast<ClassTemplateSpecializationDecl>(InstRecord)){
4991 ClassTemplateDecl *SpecTemplate = InstSpec->getSpecializedTemplate();
4992 if (ClassTemplate && isInstantiationOf(ClassTemplate, SpecTemplate))
4993 return InstRecord;
4994 }
4995
4996 // Check whether we're in the process of instantiating a member class.
4997 if (isInstantiationOf(Record, InstRecord))
4998 return InstRecord;
4999 }
5000
5001 // Move to the outer template scope.
5002 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) {
5003 if (FD->getFriendObjectKind() && FD->getDeclContext()->isFileContext()){
5004 DC = FD->getLexicalDeclContext();
5005 continue;
5006 }
5007 // An implicit deduction guide acts as if it's within the class template
5008 // specialization described by its name and first N template params.
5009 auto *Guide = dyn_cast<CXXDeductionGuideDecl>(FD);
5010 if (Guide && Guide->isImplicit()) {
5011 TemplateDecl *TD = Guide->getDeducedTemplate();
5012 // Convert the arguments to an "as-written" list.
5013 TemplateArgumentListInfo Args(Loc, Loc);
5014 for (TemplateArgument Arg : TemplateArgs.getInnermost().take_front(
5015 TD->getTemplateParameters()->size())) {
5016 ArrayRef<TemplateArgument> Unpacked(Arg);
5017 if (Arg.getKind() == TemplateArgument::Pack)
5018 Unpacked = Arg.pack_elements();
5019 for (TemplateArgument UnpackedArg : Unpacked)
5020 Args.addArgument(
5021 getTrivialTemplateArgumentLoc(UnpackedArg, QualType(), Loc));
5022 }
5023 QualType T = CheckTemplateIdType(TemplateName(TD), Loc, Args);
5024 if (T.isNull())
5025 return nullptr;
5026 DC = T->getAsCXXRecordDecl();
5027 continue;
5028 }
5029 }
5030
5031 DC = DC->getParent();
5032 }
5033
5034 // Fall through to deal with other dependent record types (e.g.,
5035 // anonymous unions in class templates).
5036 }
5037
5038 if (!ParentDC->isDependentContext())
5039 return D;
5040
5041 ParentDC = FindInstantiatedContext(Loc, ParentDC, TemplateArgs);
5042 if (!ParentDC)
5043 return nullptr;
5044
5045 if (ParentDC != D->getDeclContext()) {
5046 // We performed some kind of instantiation in the parent context,
5047 // so now we need to look into the instantiated parent context to
5048 // find the instantiation of the declaration D.
5049
5050 // If our context used to be dependent, we may need to instantiate
5051 // it before performing lookup into that context.
5052 bool IsBeingInstantiated = false;
5053 if (CXXRecordDecl *Spec = dyn_cast<CXXRecordDecl>(ParentDC)) {
5054 if (!Spec->isDependentContext()) {
5055 QualType T = Context.getTypeDeclType(Spec);
5056 const RecordType *Tag = T->getAs<RecordType>();
5057 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\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5057, __PRETTY_FUNCTION__))
;
5058 if (Tag->isBeingDefined())
5059 IsBeingInstantiated = true;
5060 if (!Tag->isBeingDefined() &&
5061 RequireCompleteType(Loc, T, diag::err_incomplete_type))
5062 return nullptr;
5063
5064 ParentDC = Tag->getDecl();
5065 }
5066 }
5067
5068 NamedDecl *Result = nullptr;
5069 // FIXME: If the name is a dependent name, this lookup won't necessarily
5070 // find it. Does that ever matter?
5071 if (auto Name = D->getDeclName()) {
5072 DeclarationNameInfo NameInfo(Name, D->getLocation());
5073 Name = SubstDeclarationNameInfo(NameInfo, TemplateArgs).getName();
5074 if (!Name)
5075 return nullptr;
5076 DeclContext::lookup_result Found = ParentDC->lookup(Name);
5077 Result = findInstantiationOf(Context, D, Found.begin(), Found.end());
5078 } else {
5079 // Since we don't have a name for the entity we're looking for,
5080 // our only option is to walk through all of the declarations to
5081 // find that name. This will occur in a few cases:
5082 //
5083 // - anonymous struct/union within a template
5084 // - unnamed class/struct/union/enum within a template
5085 //
5086 // FIXME: Find a better way to find these instantiations!
5087 Result = findInstantiationOf(Context, D,
5088 ParentDC->decls_begin(),
5089 ParentDC->decls_end());
5090 }
5091
5092 if (!Result) {
5093 if (isa<UsingShadowDecl>(D)) {
5094 // UsingShadowDecls can instantiate to nothing because of using hiding.
5095 } else if (Diags.hasErrorOccurred()) {
5096 // We've already complained about something, so most likely this
5097 // declaration failed to instantiate. There's no point in complaining
5098 // further, since this is normal in invalid code.
5099 } else if (IsBeingInstantiated) {
5100 // The class in which this member exists is currently being
5101 // instantiated, and we haven't gotten around to instantiating this
5102 // member yet. This can happen when the code uses forward declarations
5103 // of member classes, and introduces ordering dependencies via
5104 // template instantiation.
5105 Diag(Loc, diag::err_member_not_yet_instantiated)
5106 << D->getDeclName()
5107 << Context.getTypeDeclType(cast<CXXRecordDecl>(ParentDC));
5108 Diag(D->getLocation(), diag::note_non_instantiated_member_here);
5109 } else if (EnumConstantDecl *ED = dyn_cast<EnumConstantDecl>(D)) {
5110 // This enumeration constant was found when the template was defined,
5111 // but can't be found in the instantiation. This can happen if an
5112 // unscoped enumeration member is explicitly specialized.
5113 EnumDecl *Enum = cast<EnumDecl>(ED->getLexicalDeclContext());
5114 EnumDecl *Spec = cast<EnumDecl>(FindInstantiatedDecl(Loc, Enum,
5115 TemplateArgs));
5116 assert(Spec->getTemplateSpecializationKind() ==((Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization
) ? static_cast<void> (0) : __assert_fail ("Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5117, __PRETTY_FUNCTION__))
5117 TSK_ExplicitSpecialization)((Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization
) ? static_cast<void> (0) : __assert_fail ("Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5117, __PRETTY_FUNCTION__))
;
5118 Diag(Loc, diag::err_enumerator_does_not_exist)
5119 << D->getDeclName()
5120 << Context.getTypeDeclType(cast<TypeDecl>(Spec->getDeclContext()));
5121 Diag(Spec->getLocation(), diag::note_enum_specialized_here)
5122 << Context.getTypeDeclType(Spec);
5123 } else {
5124 // We should have found something, but didn't.
5125 llvm_unreachable("Unable to find instantiation of declaration!")::llvm::llvm_unreachable_internal("Unable to find instantiation of declaration!"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5125)
;
5126 }
5127 }
5128
5129 D = Result;
5130 }
5131
5132 return D;
5133}
5134
5135/// \brief Performs template instantiation for all implicit template
5136/// instantiations we have seen until this point.
5137void Sema::PerformPendingInstantiations(bool LocalOnly) {
5138 while (!PendingLocalImplicitInstantiations.empty() ||
5139 (!LocalOnly && !PendingInstantiations.empty())) {
5140 PendingImplicitInstantiation Inst;
5141
5142 if (PendingLocalImplicitInstantiations.empty()) {
5143 Inst = PendingInstantiations.front();
5144 PendingInstantiations.pop_front();
5145 } else {
5146 Inst = PendingLocalImplicitInstantiations.front();
5147 PendingLocalImplicitInstantiations.pop_front();
5148 }
5149
5150 // Instantiate function definitions
5151 if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Inst.first)) {
5152 bool DefinitionRequired = Function->getTemplateSpecializationKind() ==
5153 TSK_ExplicitInstantiationDefinition;
5154 InstantiateFunctionDefinition(/*FIXME:*/Inst.second, Function, true,
5155 DefinitionRequired, true);
5156 continue;
5157 }
5158
5159 // Instantiate variable definitions
5160 VarDecl *Var = cast<VarDecl>(Inst.first);
5161
5162 assert((Var->isStaticDataMember() ||(((Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl
>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? static_cast<void> (0) : __assert_fail
("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5165, __PRETTY_FUNCTION__))
5163 isa<VarTemplateSpecializationDecl>(Var)) &&(((Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl
>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? static_cast<void> (0) : __assert_fail
("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5165, __PRETTY_FUNCTION__))
5164 "Not a static data member, nor a variable template"(((Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl
>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? static_cast<void> (0) : __assert_fail
("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5165, __PRETTY_FUNCTION__))
5165 " specialization?")(((Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl
>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? static_cast<void> (0) : __assert_fail
("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5165, __PRETTY_FUNCTION__))
;
5166
5167 // Don't try to instantiate declarations if the most recent redeclaration
5168 // is invalid.
5169 if (Var->getMostRecentDecl()->isInvalidDecl())
5170 continue;
5171
5172 // Check if the most recent declaration has changed the specialization kind
5173 // and removed the need for implicit instantiation.
5174 switch (Var->getMostRecentDecl()->getTemplateSpecializationKind()) {
5175 case TSK_Undeclared:
5176 llvm_unreachable("Cannot instantitiate an undeclared specialization.")::llvm::llvm_unreachable_internal("Cannot instantitiate an undeclared specialization."
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301093/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5176)
;
5177 case TSK_ExplicitInstantiationDeclaration:
5178 case TSK_ExplicitSpecialization:
5179 continue; // No longer need to instantiate this type.
5180 case TSK_ExplicitInstantiationDefinition:
5181 // We only need an instantiation if the pending instantiation *is* the
5182 // explicit instantiation.
5183 if (Var != Var->getMostRecentDecl()) continue;
5184 case TSK_ImplicitInstantiation:
5185 break;
5186 }
5187
5188 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
5189 "instantiating variable definition");
5190 bool DefinitionRequired = Var->getTemplateSpecializationKind() ==
5191 TSK_ExplicitInstantiationDefinition;
5192
5193 // Instantiate static data member definitions or variable template
5194 // specializations.
5195 InstantiateVariableDefinition(/*FIXME:*/ Inst.second, Var, true,
5196 DefinitionRequired, true);
5197 }
5198}
5199
5200void Sema::PerformDependentDiagnostics(const DeclContext *Pattern,
5201 const MultiLevelTemplateArgumentList &TemplateArgs) {
5202 for (auto DD : Pattern->ddiags()) {
5203 switch (DD->getKind()) {
5204 case DependentDiagnostic::Access:
5205 HandleDependentAccessCheck(*DD, TemplateArgs);
5206 break;
5207 }
5208 }
5209}