clang  9.0.0svn
DeclTemplate.cpp
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1 //===- DeclTemplate.cpp - Template Declaration AST Node Implementation ----===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the C++ related Decl classes for templates.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/AST/DeclTemplate.h"
14 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/Expr.h"
20 #include "clang/AST/TemplateBase.h"
21 #include "clang/AST/TemplateName.h"
22 #include "clang/AST/Type.h"
23 #include "clang/AST/TypeLoc.h"
24 #include "clang/Basic/Builtins.h"
25 #include "clang/Basic/LLVM.h"
27 #include "llvm/ADT/ArrayRef.h"
28 #include "llvm/ADT/FoldingSet.h"
29 #include "llvm/ADT/None.h"
30 #include "llvm/ADT/PointerUnion.h"
31 #include "llvm/ADT/SmallVector.h"
32 #include "llvm/Support/Casting.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include <algorithm>
35 #include <cassert>
36 #include <cstdint>
37 #include <memory>
38 #include <utility>
39 
40 using namespace clang;
41 
42 //===----------------------------------------------------------------------===//
43 // TemplateParameterList Implementation
44 //===----------------------------------------------------------------------===//
45 
47  SourceLocation LAngleLoc,
48  ArrayRef<NamedDecl *> Params,
49  SourceLocation RAngleLoc,
50  Expr *RequiresClause)
51  : TemplateLoc(TemplateLoc), LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc),
52  NumParams(Params.size()), ContainsUnexpandedParameterPack(false),
53  HasRequiresClause(static_cast<bool>(RequiresClause)) {
54  for (unsigned Idx = 0; Idx < NumParams; ++Idx) {
55  NamedDecl *P = Params[Idx];
56  begin()[Idx] = P;
57 
58  if (!P->isTemplateParameterPack()) {
59  if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P))
60  if (NTTP->getType()->containsUnexpandedParameterPack())
61  ContainsUnexpandedParameterPack = true;
62 
63  if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(P))
64  if (TTP->getTemplateParameters()->containsUnexpandedParameterPack())
65  ContainsUnexpandedParameterPack = true;
66 
67  // FIXME: If a default argument contains an unexpanded parameter pack, the
68  // template parameter list does too.
69  }
70  }
71  if (RequiresClause) {
72  *getTrailingObjects<Expr *>() = RequiresClause;
73  }
74 }
75 
78  SourceLocation LAngleLoc,
79  ArrayRef<NamedDecl *> Params,
80  SourceLocation RAngleLoc, Expr *RequiresClause) {
81  void *Mem = C.Allocate(totalSizeToAlloc<NamedDecl *, Expr *>(
82  Params.size(), RequiresClause ? 1u : 0u),
83  alignof(TemplateParameterList));
84  return new (Mem) TemplateParameterList(TemplateLoc, LAngleLoc, Params,
85  RAngleLoc, RequiresClause);
86 }
87 
89  unsigned NumRequiredArgs = 0;
90  for (const NamedDecl *P : asArray()) {
91  if (P->isTemplateParameterPack()) {
92  if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P))
93  if (NTTP->isExpandedParameterPack()) {
94  NumRequiredArgs += NTTP->getNumExpansionTypes();
95  continue;
96  }
97 
98  break;
99  }
100 
101  if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(P)) {
102  if (TTP->hasDefaultArgument())
103  break;
104  } else if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) {
105  if (NTTP->hasDefaultArgument())
106  break;
107  } else if (cast<TemplateTemplateParmDecl>(P)->hasDefaultArgument())
108  break;
109 
110  ++NumRequiredArgs;
111  }
112 
113  return NumRequiredArgs;
114 }
115 
117  if (size() == 0)
118  return 0;
119 
120  const NamedDecl *FirstParm = getParam(0);
121  if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(FirstParm))
122  return TTP->getDepth();
123  else if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(FirstParm))
124  return NTTP->getDepth();
125  else
126  return cast<TemplateTemplateParmDecl>(FirstParm)->getDepth();
127 }
128 
130  DeclContext *Owner) {
131  for (NamedDecl *P : *Params) {
132  P->setDeclContext(Owner);
133 
134  if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(P))
135  AdoptTemplateParameterList(TTP->getTemplateParameters(), Owner);
136  }
137 }
138 
139 namespace clang {
140 
142  return new (C) char[sizeof(void*) * 2];
143 }
144 
145 } // namespace clang
146 
147 //===----------------------------------------------------------------------===//
148 // RedeclarableTemplateDecl Implementation
149 //===----------------------------------------------------------------------===//
150 
151 void RedeclarableTemplateDecl::anchor() {}
152 
154  if (Common)
155  return Common;
156 
157  // Walk the previous-declaration chain until we either find a declaration
158  // with a common pointer or we run out of previous declarations.
160  for (const RedeclarableTemplateDecl *Prev = getPreviousDecl(); Prev;
161  Prev = Prev->getPreviousDecl()) {
162  if (Prev->Common) {
163  Common = Prev->Common;
164  break;
165  }
166 
167  PrevDecls.push_back(Prev);
168  }
169 
170  // If we never found a common pointer, allocate one now.
171  if (!Common) {
172  // FIXME: If any of the declarations is from an AST file, we probably
173  // need an update record to add the common data.
174 
175  Common = newCommon(getASTContext());
176  }
177 
178  // Update any previous declarations we saw with the common pointer.
179  for (const RedeclarableTemplateDecl *Prev : PrevDecls)
180  Prev->Common = Common;
181 
182  return Common;
183 }
184 
186  // Grab the most recent declaration to ensure we've loaded any lazy
187  // redeclarations of this template.
188  CommonBase *CommonBasePtr = getMostRecentDecl()->getCommonPtr();
189  if (CommonBasePtr->LazySpecializations) {
190  ASTContext &Context = getASTContext();
191  uint32_t *Specs = CommonBasePtr->LazySpecializations;
192  CommonBasePtr->LazySpecializations = nullptr;
193  for (uint32_t I = 0, N = *Specs++; I != N; ++I)
194  (void)Context.getExternalSource()->GetExternalDecl(Specs[I]);
195  }
196 }
197 
198 template<class EntryType>
201  llvm::FoldingSetVector<EntryType> &Specs, ArrayRef<TemplateArgument> Args,
202  void *&InsertPos) {
203  using SETraits = SpecEntryTraits<EntryType>;
204 
205  llvm::FoldingSetNodeID ID;
206  EntryType::Profile(ID, Args, getASTContext());
207  EntryType *Entry = Specs.FindNodeOrInsertPos(ID, InsertPos);
208  return Entry ? SETraits::getDecl(Entry)->getMostRecentDecl() : nullptr;
209 }
210 
211 template<class Derived, class EntryType>
213  llvm::FoldingSetVector<EntryType> &Specializations, EntryType *Entry,
214  void *InsertPos) {
215  using SETraits = SpecEntryTraits<EntryType>;
216 
217  if (InsertPos) {
218 #ifndef NDEBUG
219  void *CorrectInsertPos;
220  assert(!findSpecializationImpl(Specializations,
221  SETraits::getTemplateArgs(Entry),
222  CorrectInsertPos) &&
223  InsertPos == CorrectInsertPos &&
224  "given incorrect InsertPos for specialization");
225 #endif
226  Specializations.InsertNode(Entry, InsertPos);
227  } else {
228  EntryType *Existing = Specializations.GetOrInsertNode(Entry);
229  (void)Existing;
230  assert(SETraits::getDecl(Existing)->isCanonicalDecl() &&
231  "non-canonical specialization?");
232  }
233 
234  if (ASTMutationListener *L = getASTMutationListener())
235  L->AddedCXXTemplateSpecialization(cast<Derived>(this),
236  SETraits::getDecl(Entry));
237 }
238 
239 //===----------------------------------------------------------------------===//
240 // FunctionTemplateDecl Implementation
241 //===----------------------------------------------------------------------===//
242 
244  DeclContext *DC,
245  SourceLocation L,
246  DeclarationName Name,
247  TemplateParameterList *Params,
248  NamedDecl *Decl) {
249  AdoptTemplateParameterList(Params, cast<DeclContext>(Decl));
250  return new (C, DC) FunctionTemplateDecl(C, DC, L, Name, Params, Decl);
251 }
252 
254  unsigned ID) {
255  return new (C, ID) FunctionTemplateDecl(C, nullptr, SourceLocation(),
256  DeclarationName(), nullptr, nullptr);
257 }
258 
261  auto *CommonPtr = new (C) Common;
262  C.addDestruction(CommonPtr);
263  return CommonPtr;
264 }
265 
267  loadLazySpecializationsImpl();
268 }
269 
270 llvm::FoldingSetVector<FunctionTemplateSpecializationInfo> &
272  LoadLazySpecializations();
273  return getCommonPtr()->Specializations;
274 }
275 
276 FunctionDecl *
278  void *&InsertPos) {
279  return findSpecializationImpl(getSpecializations(), Args, InsertPos);
280 }
281 
283  FunctionTemplateSpecializationInfo *Info, void *InsertPos) {
284  addSpecializationImpl<FunctionTemplateDecl>(getSpecializations(), Info,
285  InsertPos);
286 }
287 
289  TemplateParameterList *Params = getTemplateParameters();
290  Common *CommonPtr = getCommonPtr();
291  if (!CommonPtr->InjectedArgs) {
292  auto &Context = getASTContext();
294  Context.getInjectedTemplateArgs(Params, TemplateArgs);
295  CommonPtr->InjectedArgs =
296  new (Context) TemplateArgument[TemplateArgs.size()];
297  std::copy(TemplateArgs.begin(), TemplateArgs.end(),
298  CommonPtr->InjectedArgs);
299  }
300 
301  return llvm::makeArrayRef(CommonPtr->InjectedArgs, Params->size());
302 }
303 
306 
307  // If we haven't created a common pointer yet, then it can just be created
308  // with the usual method.
309  if (!Base::Common)
310  return;
311 
312  Common *ThisCommon = static_cast<Common *>(Base::Common);
313  Common *PrevCommon = nullptr;
315  for (; Prev; Prev = Prev->getPreviousDecl()) {
316  if (Prev->Base::Common) {
317  PrevCommon = static_cast<Common *>(Prev->Base::Common);
318  break;
319  }
320  PreviousDecls.push_back(Prev);
321  }
322 
323  // If the previous redecl chain hasn't created a common pointer yet, then just
324  // use this common pointer.
325  if (!PrevCommon) {
326  for (auto *D : PreviousDecls)
327  D->Base::Common = ThisCommon;
328  return;
329  }
330 
331  // Ensure we don't leak any important state.
332  assert(ThisCommon->Specializations.size() == 0 &&
333  "Can't merge incompatible declarations!");
334 
335  Base::Common = PrevCommon;
336 }
337 
338 //===----------------------------------------------------------------------===//
339 // ClassTemplateDecl Implementation
340 //===----------------------------------------------------------------------===//
341 
343  DeclContext *DC,
344  SourceLocation L,
345  DeclarationName Name,
346  TemplateParameterList *Params,
347  NamedDecl *Decl,
348  Expr *AssociatedConstraints) {
349  AdoptTemplateParameterList(Params, cast<DeclContext>(Decl));
350 
351  if (!AssociatedConstraints) {
352  return new (C, DC) ClassTemplateDecl(C, DC, L, Name, Params, Decl);
353  }
354 
355  auto *const CTDI = new (C) ConstrainedTemplateDeclInfo;
356  auto *const New =
357  new (C, DC) ClassTemplateDecl(CTDI, C, DC, L, Name, Params, Decl);
358  New->setAssociatedConstraints(AssociatedConstraints);
359  return New;
360 }
361 
363  unsigned ID) {
364  return new (C, ID) ClassTemplateDecl(C, nullptr, SourceLocation(),
365  DeclarationName(), nullptr, nullptr);
366 }
367 
369  loadLazySpecializationsImpl();
370 }
371 
372 llvm::FoldingSetVector<ClassTemplateSpecializationDecl> &
374  LoadLazySpecializations();
375  return getCommonPtr()->Specializations;
376 }
377 
378 llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl> &
380  LoadLazySpecializations();
381  return getCommonPtr()->PartialSpecializations;
382 }
383 
386  auto *CommonPtr = new (C) Common;
387  C.addDestruction(CommonPtr);
388  return CommonPtr;
389 }
390 
393  void *&InsertPos) {
394  return findSpecializationImpl(getSpecializations(), Args, InsertPos);
395 }
396 
398  void *InsertPos) {
399  addSpecializationImpl<ClassTemplateDecl>(getSpecializations(), D, InsertPos);
400 }
401 
404  void *&InsertPos) {
405  return findSpecializationImpl(getPartialSpecializations(), Args, InsertPos);
406 }
407 
410  void *InsertPos) {
411  if (InsertPos)
412  getPartialSpecializations().InsertNode(D, InsertPos);
413  else {
415  = getPartialSpecializations().GetOrInsertNode(D);
416  (void)Existing;
417  assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
418  }
419 
420  if (ASTMutationListener *L = getASTMutationListener())
421  L->AddedCXXTemplateSpecialization(this, D);
422 }
423 
426  llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl> &PartialSpecs
427  = getPartialSpecializations();
428  PS.clear();
429  PS.reserve(PartialSpecs.size());
430  for (ClassTemplatePartialSpecializationDecl &P : PartialSpecs)
431  PS.push_back(P.getMostRecentDecl());
432 }
433 
436  ASTContext &Context = getASTContext();
438  getPartialSpecializations()) {
439  if (Context.hasSameType(P.getInjectedSpecializationType(), T))
440  return P.getMostRecentDecl();
441  }
442 
443  return nullptr;
444 }
445 
449  Decl *DCanon = D->getCanonicalDecl();
450  for (ClassTemplatePartialSpecializationDecl &P : getPartialSpecializations()) {
451  if (P.getInstantiatedFromMember()->getCanonicalDecl() == DCanon)
452  return P.getMostRecentDecl();
453  }
454 
455  return nullptr;
456 }
457 
458 QualType
460  Common *CommonPtr = getCommonPtr();
461  if (!CommonPtr->InjectedClassNameType.isNull())
462  return CommonPtr->InjectedClassNameType;
463 
464  // C++0x [temp.dep.type]p2:
465  // The template argument list of a primary template is a template argument
466  // list in which the nth template argument has the value of the nth template
467  // parameter of the class template. If the nth template parameter is a
468  // template parameter pack (14.5.3), the nth template argument is a pack
469  // expansion (14.5.3) whose pattern is the name of the template parameter
470  // pack.
471  ASTContext &Context = getASTContext();
472  TemplateParameterList *Params = getTemplateParameters();
474  Context.getInjectedTemplateArgs(Params, TemplateArgs);
475  CommonPtr->InjectedClassNameType
477  TemplateArgs);
478  return CommonPtr->InjectedClassNameType;
479 }
480 
481 //===----------------------------------------------------------------------===//
482 // TemplateTypeParm Allocation/Deallocation Method Implementations
483 //===----------------------------------------------------------------------===//
484 
487  SourceLocation KeyLoc, SourceLocation NameLoc,
488  unsigned D, unsigned P, IdentifierInfo *Id,
489  bool Typename, bool ParameterPack) {
490  auto *TTPDecl =
491  new (C, DC) TemplateTypeParmDecl(DC, KeyLoc, NameLoc, Id, Typename);
492  QualType TTPType = C.getTemplateTypeParmType(D, P, ParameterPack, TTPDecl);
493  TTPDecl->setTypeForDecl(TTPType.getTypePtr());
494  return TTPDecl;
495 }
496 
499  return new (C, ID) TemplateTypeParmDecl(nullptr, SourceLocation(),
500  SourceLocation(), nullptr, false);
501 }
502 
504  return hasDefaultArgument()
505  ? getDefaultArgumentInfo()->getTypeLoc().getBeginLoc()
506  : SourceLocation();
507 }
508 
510  if (hasDefaultArgument() && !defaultArgumentWasInherited())
511  return SourceRange(getBeginLoc(),
512  getDefaultArgumentInfo()->getTypeLoc().getEndLoc());
513  else
514  return TypeDecl::getSourceRange();
515 }
516 
518  return getTypeForDecl()->getAs<TemplateTypeParmType>()->getDepth();
519 }
520 
522  return getTypeForDecl()->getAs<TemplateTypeParmType>()->getIndex();
523 }
524 
526  return getTypeForDecl()->getAs<TemplateTypeParmType>()->isParameterPack();
527 }
528 
529 //===----------------------------------------------------------------------===//
530 // NonTypeTemplateParmDecl Method Implementations
531 //===----------------------------------------------------------------------===//
532 
533 NonTypeTemplateParmDecl::NonTypeTemplateParmDecl(
534  DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, unsigned D,
535  unsigned P, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
536  ArrayRef<QualType> ExpandedTypes, ArrayRef<TypeSourceInfo *> ExpandedTInfos)
537  : DeclaratorDecl(NonTypeTemplateParm, DC, IdLoc, Id, T, TInfo, StartLoc),
538  TemplateParmPosition(D, P), ParameterPack(true),
539  ExpandedParameterPack(true), NumExpandedTypes(ExpandedTypes.size()) {
540  if (!ExpandedTypes.empty() && !ExpandedTInfos.empty()) {
541  auto TypesAndInfos =
542  getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
543  for (unsigned I = 0; I != NumExpandedTypes; ++I) {
544  new (&TypesAndInfos[I].first) QualType(ExpandedTypes[I]);
545  TypesAndInfos[I].second = ExpandedTInfos[I];
546  }
547  }
548 }
549 
552  SourceLocation StartLoc, SourceLocation IdLoc,
553  unsigned D, unsigned P, IdentifierInfo *Id,
554  QualType T, bool ParameterPack,
555  TypeSourceInfo *TInfo) {
556  return new (C, DC) NonTypeTemplateParmDecl(DC, StartLoc, IdLoc, D, P, Id,
557  T, ParameterPack, TInfo);
558 }
559 
561  const ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
562  SourceLocation IdLoc, unsigned D, unsigned P, IdentifierInfo *Id,
563  QualType T, TypeSourceInfo *TInfo, ArrayRef<QualType> ExpandedTypes,
564  ArrayRef<TypeSourceInfo *> ExpandedTInfos) {
565  return new (C, DC,
566  additionalSizeToAlloc<std::pair<QualType, TypeSourceInfo *>>(
567  ExpandedTypes.size()))
568  NonTypeTemplateParmDecl(DC, StartLoc, IdLoc, D, P, Id, T, TInfo,
569  ExpandedTypes, ExpandedTInfos);
570 }
571 
574  return new (C, ID) NonTypeTemplateParmDecl(nullptr, SourceLocation(),
575  SourceLocation(), 0, 0, nullptr,
576  QualType(), false, nullptr);
577 }
578 
581  unsigned NumExpandedTypes) {
582  auto *NTTP =
583  new (C, ID, additionalSizeToAlloc<std::pair<QualType, TypeSourceInfo *>>(
584  NumExpandedTypes))
586  0, 0, nullptr, QualType(), nullptr, None,
587  None);
588  NTTP->NumExpandedTypes = NumExpandedTypes;
589  return NTTP;
590 }
591 
593  if (hasDefaultArgument() && !defaultArgumentWasInherited())
594  return SourceRange(getOuterLocStart(),
595  getDefaultArgument()->getSourceRange().getEnd());
597 }
598 
600  return hasDefaultArgument()
601  ? getDefaultArgument()->getSourceRange().getBegin()
602  : SourceLocation();
603 }
604 
605 //===----------------------------------------------------------------------===//
606 // TemplateTemplateParmDecl Method Implementations
607 //===----------------------------------------------------------------------===//
608 
609 void TemplateTemplateParmDecl::anchor() {}
610 
611 TemplateTemplateParmDecl::TemplateTemplateParmDecl(
612  DeclContext *DC, SourceLocation L, unsigned D, unsigned P,
615  : TemplateDecl(TemplateTemplateParm, DC, L, Id, Params),
616  TemplateParmPosition(D, P), ParameterPack(true),
617  ExpandedParameterPack(true), NumExpandedParams(Expansions.size()) {
618  if (!Expansions.empty())
619  std::uninitialized_copy(Expansions.begin(), Expansions.end(),
620  getTrailingObjects<TemplateParameterList *>());
621 }
622 
625  SourceLocation L, unsigned D, unsigned P,
626  bool ParameterPack, IdentifierInfo *Id,
627  TemplateParameterList *Params) {
628  return new (C, DC) TemplateTemplateParmDecl(DC, L, D, P, ParameterPack, Id,
629  Params);
630 }
631 
634  SourceLocation L, unsigned D, unsigned P,
635  IdentifierInfo *Id,
636  TemplateParameterList *Params,
638  return new (C, DC,
639  additionalSizeToAlloc<TemplateParameterList *>(Expansions.size()))
640  TemplateTemplateParmDecl(DC, L, D, P, Id, Params, Expansions);
641 }
642 
645  return new (C, ID) TemplateTemplateParmDecl(nullptr, SourceLocation(), 0, 0,
646  false, nullptr, nullptr);
647 }
648 
651  unsigned NumExpansions) {
652  auto *TTP =
653  new (C, ID, additionalSizeToAlloc<TemplateParameterList *>(NumExpansions))
654  TemplateTemplateParmDecl(nullptr, SourceLocation(), 0, 0, nullptr,
655  nullptr, None);
656  TTP->NumExpandedParams = NumExpansions;
657  return TTP;
658 }
659 
661  return hasDefaultArgument() ? getDefaultArgument().getLocation()
662  : SourceLocation();
663 }
664 
666  const ASTContext &C, const TemplateArgumentLoc &DefArg) {
667  if (DefArg.getArgument().isNull())
668  DefaultArgument.set(nullptr);
669  else
670  DefaultArgument.set(new (C) TemplateArgumentLoc(DefArg));
671 }
672 
673 //===----------------------------------------------------------------------===//
674 // TemplateArgumentList Implementation
675 //===----------------------------------------------------------------------===//
676 TemplateArgumentList::TemplateArgumentList(ArrayRef<TemplateArgument> Args)
677  : Arguments(getTrailingObjects<TemplateArgument>()),
678  NumArguments(Args.size()) {
679  std::uninitialized_copy(Args.begin(), Args.end(),
680  getTrailingObjects<TemplateArgument>());
681 }
682 
686  void *Mem = Context.Allocate(totalSizeToAlloc<TemplateArgument>(Args.size()));
687  return new (Mem) TemplateArgumentList(Args);
688 }
689 
692  TemplateSpecializationKind TSK, const TemplateArgumentList *TemplateArgs,
693  const TemplateArgumentListInfo *TemplateArgsAsWritten, SourceLocation POI,
694  MemberSpecializationInfo *MSInfo) {
695  const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
696  if (TemplateArgsAsWritten)
697  ArgsAsWritten = ASTTemplateArgumentListInfo::Create(C,
698  *TemplateArgsAsWritten);
699 
700  void *Mem =
701  C.Allocate(totalSizeToAlloc<MemberSpecializationInfo *>(MSInfo ? 1 : 0));
702  return new (Mem) FunctionTemplateSpecializationInfo(
703  FD, Template, TSK, TemplateArgs, ArgsAsWritten, POI, MSInfo);
704 }
705 
706 //===----------------------------------------------------------------------===//
707 // TemplateDecl Implementation
708 //===----------------------------------------------------------------------===//
709 
710 void TemplateDecl::anchor() {}
711 
712 //===----------------------------------------------------------------------===//
713 // ClassTemplateSpecializationDecl Implementation
714 //===----------------------------------------------------------------------===//
715 
718  DeclContext *DC, SourceLocation StartLoc,
719  SourceLocation IdLoc,
720  ClassTemplateDecl *SpecializedTemplate,
723  : CXXRecordDecl(DK, TK, Context, DC, StartLoc, IdLoc,
724  SpecializedTemplate->getIdentifier(), PrevDecl),
725  SpecializedTemplate(SpecializedTemplate),
726  TemplateArgs(TemplateArgumentList::CreateCopy(Context, Args)),
727  SpecializationKind(TSK_Undeclared) {
728 }
729 
731  Kind DK)
732  : CXXRecordDecl(DK, TTK_Struct, C, nullptr, SourceLocation(),
733  SourceLocation(), nullptr, nullptr),
734  SpecializationKind(TSK_Undeclared) {}
735 
738  DeclContext *DC,
739  SourceLocation StartLoc,
740  SourceLocation IdLoc,
741  ClassTemplateDecl *SpecializedTemplate,
744  auto *Result =
745  new (Context, DC) ClassTemplateSpecializationDecl(
746  Context, ClassTemplateSpecialization, TK, DC, StartLoc, IdLoc,
747  SpecializedTemplate, Args, PrevDecl);
748  Result->setMayHaveOutOfDateDef(false);
749 
750  Context.getTypeDeclType(Result, PrevDecl);
751  return Result;
752 }
753 
756  unsigned ID) {
757  auto *Result =
758  new (C, ID) ClassTemplateSpecializationDecl(C, ClassTemplateSpecialization);
759  Result->setMayHaveOutOfDateDef(false);
760  return Result;
761 }
762 
764  raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
765  NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
766 
767  const auto *PS = dyn_cast<ClassTemplatePartialSpecializationDecl>(this);
768  if (const ASTTemplateArgumentListInfo *ArgsAsWritten =
769  PS ? PS->getTemplateArgsAsWritten() : nullptr) {
770  printTemplateArgumentList(OS, ArgsAsWritten->arguments(), Policy);
771  } else {
772  const TemplateArgumentList &TemplateArgs = getTemplateArgs();
773  printTemplateArgumentList(OS, TemplateArgs.asArray(), Policy);
774  }
775 }
776 
779  if (const auto *PartialSpec =
780  SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
781  return PartialSpec->PartialSpecialization->getSpecializedTemplate();
782  return SpecializedTemplate.get<ClassTemplateDecl*>();
783 }
784 
787  if (ExplicitInfo) {
789  if (Begin.isValid()) {
790  // Here we have an explicit (partial) specialization or instantiation.
794  if (getExternLoc().isValid())
795  Begin = getExternLoc();
797  if (End.isInvalid())
799  return SourceRange(Begin, End);
800  }
801  // An implicit instantiation of a class template partial specialization
802  // uses ExplicitInfo to record the TypeAsWritten, but the source
803  // locations should be retrieved from the instantiation pattern.
805  auto *ctpsd = const_cast<CTPSDecl *>(cast<CTPSDecl>(this));
806  CTPSDecl *inst_from = ctpsd->getInstantiatedFromMember();
807  assert(inst_from != nullptr);
808  return inst_from->getSourceRange();
809  }
810  else {
811  // No explicit info available.
812  llvm::PointerUnion<ClassTemplateDecl *,
814  inst_from = getInstantiatedFrom();
815  if (inst_from.isNull())
817  if (const auto *ctd = inst_from.dyn_cast<ClassTemplateDecl *>())
818  return ctd->getSourceRange();
819  return inst_from.get<ClassTemplatePartialSpecializationDecl *>()
820  ->getSourceRange();
821  }
822 }
823 
824 //===----------------------------------------------------------------------===//
825 // ClassTemplatePartialSpecializationDecl Implementation
826 //===----------------------------------------------------------------------===//
827 void ClassTemplatePartialSpecializationDecl::anchor() {}
828 
829 ClassTemplatePartialSpecializationDecl::
830 ClassTemplatePartialSpecializationDecl(ASTContext &Context, TagKind TK,
831  DeclContext *DC,
832  SourceLocation StartLoc,
833  SourceLocation IdLoc,
834  TemplateParameterList *Params,
835  ClassTemplateDecl *SpecializedTemplate,
837  const ASTTemplateArgumentListInfo *ArgInfos,
840  ClassTemplatePartialSpecialization,
841  TK, DC, StartLoc, IdLoc,
842  SpecializedTemplate, Args, PrevDecl),
843  TemplateParams(Params), ArgsAsWritten(ArgInfos),
844  InstantiatedFromMember(nullptr, false) {
845  AdoptTemplateParameterList(Params, this);
846 }
847 
851  SourceLocation StartLoc, SourceLocation IdLoc,
852  TemplateParameterList *Params,
853  ClassTemplateDecl *SpecializedTemplate,
855  const TemplateArgumentListInfo &ArgInfos,
856  QualType CanonInjectedType,
858  const ASTTemplateArgumentListInfo *ASTArgInfos =
859  ASTTemplateArgumentListInfo::Create(Context, ArgInfos);
860 
861  auto *Result = new (Context, DC)
862  ClassTemplatePartialSpecializationDecl(Context, TK, DC, StartLoc, IdLoc,
863  Params, SpecializedTemplate, Args,
864  ASTArgInfos, PrevDecl);
865  Result->setSpecializationKind(TSK_ExplicitSpecialization);
866  Result->setMayHaveOutOfDateDef(false);
867 
868  Context.getInjectedClassNameType(Result, CanonInjectedType);
869  return Result;
870 }
871 
874  unsigned ID) {
876  Result->setMayHaveOutOfDateDef(false);
877  return Result;
878 }
879 
880 //===----------------------------------------------------------------------===//
881 // FriendTemplateDecl Implementation
882 //===----------------------------------------------------------------------===//
883 
884 void FriendTemplateDecl::anchor() {}
885 
888  SourceLocation L,
890  FriendUnion Friend, SourceLocation FLoc) {
891  return new (Context, DC) FriendTemplateDecl(DC, L, Params, Friend, FLoc);
892 }
893 
895  unsigned ID) {
896  return new (C, ID) FriendTemplateDecl(EmptyShell());
897 }
898 
899 //===----------------------------------------------------------------------===//
900 // TypeAliasTemplateDecl Implementation
901 //===----------------------------------------------------------------------===//
902 
904  DeclContext *DC,
905  SourceLocation L,
906  DeclarationName Name,
907  TemplateParameterList *Params,
908  NamedDecl *Decl) {
909  AdoptTemplateParameterList(Params, DC);
910  return new (C, DC) TypeAliasTemplateDecl(C, DC, L, Name, Params, Decl);
911 }
912 
914  unsigned ID) {
915  return new (C, ID) TypeAliasTemplateDecl(C, nullptr, SourceLocation(),
916  DeclarationName(), nullptr, nullptr);
917 }
918 
921  auto *CommonPtr = new (C) Common;
922  C.addDestruction(CommonPtr);
923  return CommonPtr;
924 }
925 
926 //===----------------------------------------------------------------------===//
927 // ClassScopeFunctionSpecializationDecl Implementation
928 //===----------------------------------------------------------------------===//
929 
930 void ClassScopeFunctionSpecializationDecl::anchor() {}
931 
934  unsigned ID) {
936  nullptr, SourceLocation(), nullptr, nullptr);
937 }
938 
939 //===----------------------------------------------------------------------===//
940 // VarTemplateDecl Implementation
941 //===----------------------------------------------------------------------===//
942 
944  VarTemplateDecl *CurD = this;
945  while (CurD) {
946  if (CurD->isThisDeclarationADefinition())
947  return CurD;
948  CurD = CurD->getPreviousDecl();
949  }
950  return nullptr;
951 }
952 
955  TemplateParameterList *Params,
956  VarDecl *Decl) {
957  AdoptTemplateParameterList(Params, DC);
958  return new (C, DC) VarTemplateDecl(C, DC, L, Name, Params, Decl);
959 }
960 
962  unsigned ID) {
963  return new (C, ID) VarTemplateDecl(C, nullptr, SourceLocation(),
964  DeclarationName(), nullptr, nullptr);
965 }
966 
968  loadLazySpecializationsImpl();
969 }
970 
971 llvm::FoldingSetVector<VarTemplateSpecializationDecl> &
973  LoadLazySpecializations();
974  return getCommonPtr()->Specializations;
975 }
976 
977 llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &
979  LoadLazySpecializations();
980  return getCommonPtr()->PartialSpecializations;
981 }
982 
985  auto *CommonPtr = new (C) Common;
986  C.addDestruction(CommonPtr);
987  return CommonPtr;
988 }
989 
992  void *&InsertPos) {
993  return findSpecializationImpl(getSpecializations(), Args, InsertPos);
994 }
995 
997  void *InsertPos) {
998  addSpecializationImpl<VarTemplateDecl>(getSpecializations(), D, InsertPos);
999 }
1000 
1003  void *&InsertPos) {
1004  return findSpecializationImpl(getPartialSpecializations(), Args, InsertPos);
1005 }
1006 
1008  VarTemplatePartialSpecializationDecl *D, void *InsertPos) {
1009  if (InsertPos)
1010  getPartialSpecializations().InsertNode(D, InsertPos);
1011  else {
1013  getPartialSpecializations().GetOrInsertNode(D);
1014  (void)Existing;
1015  assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
1016  }
1017 
1019  L->AddedCXXTemplateSpecialization(this, D);
1020 }
1021 
1024  llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &PartialSpecs =
1025  getPartialSpecializations();
1026  PS.clear();
1027  PS.reserve(PartialSpecs.size());
1028  for (VarTemplatePartialSpecializationDecl &P : PartialSpecs)
1029  PS.push_back(P.getMostRecentDecl());
1030 }
1031 
1035  Decl *DCanon = D->getCanonicalDecl();
1036  for (VarTemplatePartialSpecializationDecl &P : getPartialSpecializations()) {
1037  if (P.getInstantiatedFromMember()->getCanonicalDecl() == DCanon)
1038  return P.getMostRecentDecl();
1039  }
1040 
1041  return nullptr;
1042 }
1043 
1044 //===----------------------------------------------------------------------===//
1045 // VarTemplateSpecializationDecl Implementation
1046 //===----------------------------------------------------------------------===//
1047 
1049  Kind DK, ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
1050  SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
1052  : VarDecl(DK, Context, DC, StartLoc, IdLoc,
1053  SpecializedTemplate->getIdentifier(), T, TInfo, S),
1054  SpecializedTemplate(SpecializedTemplate),
1055  TemplateArgs(TemplateArgumentList::CreateCopy(Context, Args)),
1056  SpecializationKind(TSK_Undeclared), IsCompleteDefinition(false) {}
1057 
1059  ASTContext &C)
1060  : VarDecl(DK, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
1061  QualType(), nullptr, SC_None),
1062  SpecializationKind(TSK_Undeclared), IsCompleteDefinition(false) {}
1063 
1065  ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
1066  SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
1068  return new (Context, DC) VarTemplateSpecializationDecl(
1069  VarTemplateSpecialization, Context, DC, StartLoc, IdLoc,
1070  SpecializedTemplate, T, TInfo, S, Args);
1071 }
1072 
1075  return new (C, ID)
1076  VarTemplateSpecializationDecl(VarTemplateSpecialization, C);
1077 }
1078 
1080  raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
1081  NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
1082 
1083  const auto *PS = dyn_cast<VarTemplatePartialSpecializationDecl>(this);
1084  if (const ASTTemplateArgumentListInfo *ArgsAsWritten =
1085  PS ? PS->getTemplateArgsAsWritten() : nullptr) {
1086  printTemplateArgumentList(OS, ArgsAsWritten->arguments(), Policy);
1087  } else {
1088  const TemplateArgumentList &TemplateArgs = getTemplateArgs();
1089  printTemplateArgumentList(OS, TemplateArgs.asArray(), Policy);
1090  }
1091 }
1092 
1094  if (const auto *PartialSpec =
1095  SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization *>())
1096  return PartialSpec->PartialSpecialization->getSpecializedTemplate();
1097  return SpecializedTemplate.get<VarTemplateDecl *>();
1098 }
1099 
1101  const TemplateArgumentListInfo &ArgsInfo) {
1102  TemplateArgsInfo.setLAngleLoc(ArgsInfo.getLAngleLoc());
1103  TemplateArgsInfo.setRAngleLoc(ArgsInfo.getRAngleLoc());
1104  for (const TemplateArgumentLoc &Loc : ArgsInfo.arguments())
1105  TemplateArgsInfo.addArgument(Loc);
1106 }
1107 
1108 //===----------------------------------------------------------------------===//
1109 // VarTemplatePartialSpecializationDecl Implementation
1110 //===----------------------------------------------------------------------===//
1111 
1112 void VarTemplatePartialSpecializationDecl::anchor() {}
1113 
1114 VarTemplatePartialSpecializationDecl::VarTemplatePartialSpecializationDecl(
1115  ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
1116  SourceLocation IdLoc, TemplateParameterList *Params,
1117  VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
1119  const ASTTemplateArgumentListInfo *ArgInfos)
1120  : VarTemplateSpecializationDecl(VarTemplatePartialSpecialization, Context,
1121  DC, StartLoc, IdLoc, SpecializedTemplate, T,
1122  TInfo, S, Args),
1123  TemplateParams(Params), ArgsAsWritten(ArgInfos),
1124  InstantiatedFromMember(nullptr, false) {
1125  // TODO: The template parameters should be in DC by now. Verify.
1126  // AdoptTemplateParameterList(Params, DC);
1127 }
1128 
1131  ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
1132  SourceLocation IdLoc, TemplateParameterList *Params,
1133  VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
1135  const TemplateArgumentListInfo &ArgInfos) {
1136  const ASTTemplateArgumentListInfo *ASTArgInfos
1137  = ASTTemplateArgumentListInfo::Create(Context, ArgInfos);
1138 
1139  auto *Result =
1140  new (Context, DC) VarTemplatePartialSpecializationDecl(
1141  Context, DC, StartLoc, IdLoc, Params, SpecializedTemplate, T, TInfo,
1142  S, Args, ASTArgInfos);
1143  Result->setSpecializationKind(TSK_ExplicitSpecialization);
1144  return Result;
1145 }
1146 
1149  unsigned ID) {
1150  return new (C, ID) VarTemplatePartialSpecializationDecl(C);
1151 }
1152 
1153 static TemplateParameterList *
1155  // typename T
1156  auto *T = TemplateTypeParmDecl::Create(
1157  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/1, /*Position=*/0,
1158  /*Id=*/nullptr, /*Typename=*/true, /*ParameterPack=*/false);
1159  T->setImplicit(true);
1160 
1161  // T ...Ints
1162  TypeSourceInfo *TI =
1163  C.getTrivialTypeSourceInfo(QualType(T->getTypeForDecl(), 0));
1165  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/0, /*Position=*/1,
1166  /*Id=*/nullptr, TI->getType(), /*ParameterPack=*/true, TI);
1167  N->setImplicit(true);
1168 
1169  // <typename T, T ...Ints>
1170  NamedDecl *P[2] = {T, N};
1171  auto *TPL = TemplateParameterList::Create(
1172  C, SourceLocation(), SourceLocation(), P, SourceLocation(), nullptr);
1173 
1174  // template <typename T, ...Ints> class IntSeq
1175  auto *TemplateTemplateParm = TemplateTemplateParmDecl::Create(
1176  C, DC, SourceLocation(), /*Depth=*/0, /*Position=*/0,
1177  /*ParameterPack=*/false, /*Id=*/nullptr, TPL);
1178  TemplateTemplateParm->setImplicit(true);
1179 
1180  // typename T
1181  auto *TemplateTypeParm = TemplateTypeParmDecl::Create(
1182  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/0, /*Position=*/1,
1183  /*Id=*/nullptr, /*Typename=*/true, /*ParameterPack=*/false);
1184  TemplateTypeParm->setImplicit(true);
1185 
1186  // T N
1188  QualType(TemplateTypeParm->getTypeForDecl(), 0));
1189  auto *NonTypeTemplateParm = NonTypeTemplateParmDecl::Create(
1190  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/0, /*Position=*/2,
1191  /*Id=*/nullptr, TInfo->getType(), /*ParameterPack=*/false, TInfo);
1192  NamedDecl *Params[] = {TemplateTemplateParm, TemplateTypeParm,
1193  NonTypeTemplateParm};
1194 
1195  // template <template <typename T, T ...Ints> class IntSeq, typename T, T N>
1197  Params, SourceLocation(), nullptr);
1198 }
1199 
1200 static TemplateParameterList *
1202  // std::size_t Index
1204  auto *Index = NonTypeTemplateParmDecl::Create(
1205  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/0, /*Position=*/0,
1206  /*Id=*/nullptr, TInfo->getType(), /*ParameterPack=*/false, TInfo);
1207 
1208  // typename ...T
1209  auto *Ts = TemplateTypeParmDecl::Create(
1210  C, DC, SourceLocation(), SourceLocation(), /*Depth=*/0, /*Position=*/1,
1211  /*Id=*/nullptr, /*Typename=*/true, /*ParameterPack=*/true);
1212  Ts->setImplicit(true);
1213 
1214  // template <std::size_t Index, typename ...T>
1215  NamedDecl *Params[] = {Index, Ts};
1217  llvm::makeArrayRef(Params),
1218  SourceLocation(), nullptr);
1219 }
1220 
1222  const ASTContext &C, DeclContext *DC, BuiltinTemplateKind BTK) {
1223  switch (BTK) {
1224  case BTK__make_integer_seq:
1225  return createMakeIntegerSeqParameterList(C, DC);
1227  return createTypePackElementParameterList(C, DC);
1228  }
1229 
1230  llvm_unreachable("unhandled BuiltinTemplateKind!");
1231 }
1232 
1233 void BuiltinTemplateDecl::anchor() {}
1234 
1235 BuiltinTemplateDecl::BuiltinTemplateDecl(const ASTContext &C, DeclContext *DC,
1236  DeclarationName Name,
1237  BuiltinTemplateKind BTK)
1238  : TemplateDecl(BuiltinTemplate, DC, SourceLocation(), Name,
1240  BTK(BTK) {}
Defines the clang::ASTContext interface.
void setImplicit(bool I=true)
Definition: DeclBase.h:552
Represents a function declaration or definition.
Definition: Decl.h:1743
A (possibly-)qualified type.
Definition: Type.h:639
virtual Decl * GetExternalDecl(uint32_t ID)
Resolve a declaration ID into a declaration, potentially building a new declaration.
llvm::FoldingSetVector< VarTemplateSpecializationDecl > & getSpecializations() const
Retrieve the set of specializations of this variable template.
static TypeAliasTemplateDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name, TemplateParameterList *Params, NamedDecl *Decl)
Create a function template node.
FunctionDecl * findSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the specialization with the provided arguments if it exists, otherwise return the insertion po...
SourceRange getBraceRange() const
Definition: Decl.h:3150
ArrayRef< TemplateArgument > getInjectedTemplateArgs()
Retrieve the "injected" template arguments that correspond to the template parameters of this functio...
ClassTemplateSpecializationDecl * findSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the specialization with the provided arguments if it exists, otherwise return the insertion po...
C Language Family Type Representation.
static TemplateTemplateParmDecl * Create(const ASTContext &C, DeclContext *DC, SourceLocation L, unsigned D, unsigned P, bool ParameterPack, IdentifierInfo *Id, TemplateParameterList *Params)
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
ArrayRef< NamedDecl * > asArray()
Definition: DeclTemplate.h:125
void setDefaultArgument(const ASTContext &C, const TemplateArgumentLoc &DefArg)
Set the default argument for this template parameter, and whether that default argument was inherited...
Defines the C++ template declaration subclasses.
StringRef P
Declaration of a variable template.
static FunctionTemplateSpecializationInfo * Create(ASTContext &C, FunctionDecl *FD, FunctionTemplateDecl *Template, TemplateSpecializationKind TSK, const TemplateArgumentList *TemplateArgs, const TemplateArgumentListInfo *TemplateArgsAsWritten, SourceLocation POI, MemberSpecializationInfo *MSInfo)
NamedDecl * getParam(unsigned Idx)
Definition: DeclTemplate.h:132
A container of type source information.
Definition: Decl.h:86
void setTemplateArgsInfo(const TemplateArgumentListInfo &ArgsInfo)
void mergePrevDecl(FunctionTemplateDecl *Prev)
Merge Prev with our RedeclarableTemplateDecl::Common.
SourceLocation getEndLoc() const
Get the end source location.
Definition: TypeLoc.cpp:226
void setRAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:574
Represents a variable declaration or definition.
Definition: Decl.h:812
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:380
void LoadLazySpecializations() const
Load any lazily-loaded specializations from the external source.
Declaration of a redeclarable template.
Definition: DeclTemplate.h:793
SourceLocation getExternLoc() const
Gets the location of the extern keyword, if present.
Represents a variable template specialization, which refers to a variable template with a given set o...
Represents an explicit template argument list in C++, e.g., the "<int>" in "sort<int>".
Definition: TemplateBase.h:603
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:67
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:37
void LoadLazySpecializations() const
Load any lazily-loaded specializations from the external source.
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: DeclTemplate.h:466
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
SourceLocation getDefaultArgumentLoc() const
Retrieve the location of the default argument, if any.
const TemplateArgumentList & getTemplateArgs() const
Retrieve the template arguments of the class template specialization.
One of these records is kept for each identifier that is lexed.
Represents a class template specialization, which refers to a class template with a given set of temp...
unsigned getDepth() const
Retrieve the depth of the template parameter.
VarTemplateSpecializationDecl(Kind DK, ASTContext &Context, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo, StorageClass S, ArrayRef< TemplateArgument > Args)
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
TemplateSpecializationKind getSpecializationKind() const
Determine the kind of specialization that this declaration represents.
Defines the position of a template parameter within a template parameter list.
VarTemplatePartialSpecializationDecl * findPartialSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the partial specialization with the provided arguments if it exists, otherwise return the inse...
void * allocateDefaultArgStorageChain(const ASTContext &C)
static TemplateArgumentList * CreateCopy(ASTContext &Context, ArrayRef< TemplateArgument > Args)
Create a new template argument list that copies the given set of template arguments.
Stores the template parameter list and associated constraints for TemplateDecl objects that track ass...
Definition: DeclTemplate.h:374
Declaration of a function specialization at template class scope.
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:512
unsigned getMinRequiredArguments() const
Returns the minimum number of arguments needed to form a template specialization. ...
A convenient class for passing around template argument information.
Definition: TemplateBase.h:554
const TemplateArgumentList & getTemplateArgs() const
Retrieve the template arguments of the variable template specialization.
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
static TemplateParameterList * createTypePackElementParameterList(const ASTContext &C, DeclContext *DC)
static ClassTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
static TemplateTypeParmDecl * Create(const ASTContext &C, DeclContext *DC, SourceLocation KeyLoc, SourceLocation NameLoc, unsigned D, unsigned P, IdentifierInfo *Id, bool Typename, bool ParameterPack)
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:1891
SourceLocation getDefaultArgumentLoc() const
Retrieves the location of the default argument declaration.
VarTemplateDecl * getSpecializedTemplate() const
Retrieve the template that this specialization specializes.
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6121
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:727
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
static FunctionTemplateDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name, TemplateParameterList *Params, NamedDecl *Decl)
Create a function template node.
void AddPartialSpecialization(ClassTemplatePartialSpecializationDecl *D, void *InsertPos)
Insert the specified partial specialization knowing that it is not already in.
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
SpecEntryTraits< EntryType >::DeclType * findSpecializationImpl(llvm::FoldingSetVector< EntryType > &Specs, ArrayRef< TemplateArgument > Args, void *&InsertPos)
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:104
void AddSpecialization(VarTemplateSpecializationDecl *D, void *InsertPos)
Insert the specified specialization knowing that it is not already in.
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
void AddPartialSpecialization(VarTemplatePartialSpecializationDecl *D, void *InsertPos)
Insert the specified partial specialization knowing that it is not already in.
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:876
This represents one expression.
Definition: Expr.h:108
CommonBase * getCommonPtr() const
Retrieves the "common" pointer shared by all (re-)declarations of the same template.
void setAssociatedConstraints(Expr *AC)
Definition: DeclTemplate.h:491
SourceLocation End
static ClassTemplatePartialSpecializationDecl * Create(ASTContext &Context, TagKind TK, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, TemplateParameterList *Params, ClassTemplateDecl *SpecializedTemplate, ArrayRef< TemplateArgument > Args, const TemplateArgumentListInfo &ArgInfos, QualType CanonInjectedType, ClassTemplatePartialSpecializationDecl *PrevDecl)
int Id
Definition: ASTDiff.cpp:190
Declaration of a template type parameter.
llvm::PointerUnion< NamedDecl *, TypeSourceInfo * > FriendUnion
#define bool
Definition: stdbool.h:15
ClassTemplateDecl * getSpecializedTemplate() const
Retrieve the template that this specialization specializes.
Data that is common to all of the declarations of a given variable template.
SourceLocation Begin
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
ArrayRef< TemplateArgument > asArray() const
Produce this as an array ref.
Definition: DeclTemplate.h:268
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:200
Represents a C++ template name within the type system.
Definition: TemplateName.h:187
void printTemplateArgumentList(raw_ostream &OS, ArrayRef< TemplateArgument > Args, const PrintingPolicy &Policy)
Print a template argument list, including the &#39;<&#39; and &#39;>&#39; enclosing the template arguments.
Defines the clang::TypeLoc interface and its subclasses.
StorageClass
Storage classes.
Definition: Specifiers.h:213
Declaration of an alias template.
llvm::FoldingSetVector< ClassTemplatePartialSpecializationDecl > & getPartialSpecializations()
Retrieve the set of partial specializations of this class template.
SourceLocation getEnd() const
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
static TemplateParameterList * createBuiltinTemplateParameterList(const ASTContext &C, DeclContext *DC, BuiltinTemplateKind BTK)
ClassTemplatePartialSpecializationDecl * getInstantiatedFromMember() const
Retrieve the member class template partial specialization from which this particular class template p...
Data that is common to all of the declarations of a given class template.
QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl *PrevDecl=nullptr) const
Return the unique reference to the type for the specified type declaration.
Definition: ASTContext.h:1395
The result type of a method or function.
void addDestruction(T *Ptr)
If T isn&#39;t trivially destructible, calls AddDeallocation to register it for destruction.
Definition: ASTContext.h:2755
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:704
static StringRef getIdentifier(const Token &Tok)
VarDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2060
static TemplateParameterList * Create(const ASTContext &C, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ArrayRef< NamedDecl *> Params, SourceLocation RAngleLoc, Expr *RequiresClause)
static TypeAliasTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty alias template node.
#define false
Definition: stdbool.h:17
The "struct" keyword.
Definition: Type.h:5082
llvm::FoldingSetVector< ClassTemplateSpecializationDecl > & getSpecializations() const
Retrieve the set of specializations of this class template.
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:203
uint32_t * LazySpecializations
If non-null, points to an array of specializations (including partial specializations) known only by ...
Definition: DeclTemplate.h:877
static ClassTemplateSpecializationDecl * Create(ASTContext &Context, TagKind TK, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, ClassTemplateDecl *SpecializedTemplate, ArrayRef< TemplateArgument > Args, ClassTemplateSpecializationDecl *PrevDecl)
CommonBase * newCommon(ASTContext &C) const override
ClassTemplatePartialSpecializationDecl * findPartialSpecInstantiatedFromMember(ClassTemplatePartialSpecializationDecl *D)
Find a class template partial specialization which was instantiated from the given member partial spe...
QualType InjectedClassNameType
The injected-class-name type for this class template.
bool isParameterPack() const
Returns whether this is a parameter pack.
Encodes a location in the source.
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
llvm::PointerUnion< ClassTemplateDecl *, ClassTemplatePartialSpecializationDecl * > getInstantiatedFrom() const
If this class template specialization is an instantiation of a template (rather than an explicit spec...
This names the __make_integer_seq BuiltinTemplateDecl.
Definition: Builtins.h:250
CommonBase * newCommon(ASTContext &C) const override
Data that is common to all of the declarations of a given function template.
static void AdoptTemplateParameterList(TemplateParameterList *Params, DeclContext *Owner)
QualType getInjectedClassNameSpecialization()
Retrieve the template specialization type of the injected-class-name for this class template...
BuiltinTemplateKind
Kinds of BuiltinTemplateDecl.
Definition: Builtins.h:248
FunctionTemplateDecl * getPreviousDecl()
Retrieve the previous declaration of this function template, or nullptr if no such declaration exists...
static FriendTemplateDecl * Create(ASTContext &Context, DeclContext *DC, SourceLocation Loc, MutableArrayRef< TemplateParameterList *> Params, FriendUnion Friend, SourceLocation FriendLoc)
This template specialization was instantiated from a template due to an explicit instantiation defini...
Definition: Specifiers.h:171
This template specialization was formed from a template-id but has not yet been declared, defined, or instantiated.
Definition: Specifiers.h:156
TypeSourceInfo * getTypeAsWritten() const
Gets the type of this specialization as it was written by the user, if it was so written.
static VarTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty variable template node.
static TemplateParameterList * createMakeIntegerSeqParameterList(const ASTContext &C, DeclContext *DC)
void addSpecialization(FunctionTemplateSpecializationInfo *Info, void *InsertPos)
Add a specialization of this function template.
void setLAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:573
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:594
static ClassTemplateDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name, TemplateParameterList *Params, NamedDecl *Decl, Expr *AssociatedConstraints=nullptr)
Create a class template node.
void * Allocate(size_t Size, unsigned Align=8) const
Definition: ASTContext.h:669
Represents a template argument.
Definition: TemplateBase.h:50
QualType getTemplateSpecializationType(TemplateName T, ArrayRef< TemplateArgument > Args, QualType Canon=QualType()) const
SourceLocation getTemplateKeywordLoc() const
Gets the location of the template keyword, if present.
TagTypeKind
The kind of a tag type.
Definition: Type.h:5080
Dataflow Directional Tag Classes.
void getInjectedTemplateArgs(const TemplateParameterList *Params, SmallVectorImpl< TemplateArgument > &Args)
Get a template argument list with one argument per template parameter in a template parameter list...
virtual void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const
Appends a human-readable name for this declaration into the given stream.
Definition: Decl.cpp:1654
bool isValid() const
Return true if this is a valid SourceLocation object.
static ClassScopeFunctionSpecializationDecl * CreateDeserialized(ASTContext &Context, unsigned ID)
const TemplateArgument & getArgument() const
Definition: TemplateBase.h:498
static NonTypeTemplateParmDecl * Create(const ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, unsigned D, unsigned P, IdentifierInfo *Id, QualType T, bool ParameterPack, TypeSourceInfo *TInfo)
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1264
static ClassTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty class template node.
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:403
void LoadLazySpecializations() const
Load any lazily-loaded specializations from the external source.
This template specialization was instantiated from a template due to an explicit instantiation declar...
Definition: Specifiers.h:167
unsigned getIndex() const
Retrieve the index of the template parameter.
static VarTemplatePartialSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
The name of a declaration.
static NonTypeTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
This names the __type_pack_element BuiltinTemplateDecl.
Definition: Builtins.h:253
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
Definition: Specifiers.h:153
llvm::ArrayRef< TemplateArgumentLoc > arguments() const
Definition: TemplateBase.h:582
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1078
static FriendTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
bool isThisDeclarationADefinition() const
Returns whether this template declaration defines the primary variable pattern.
bool isNull() const
Determine whether this template argument has no value.
Definition: TemplateBase.h:237
VarTemplateSpecializationDecl * findSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the specialization with the provided arguments if it exists, otherwise return the insertion po...
void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const override
Appends a human-readable name for this declaration into the given stream.
unsigned getDepth() const
Get the depth of this template parameter list in the set of template parameter lists.
void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const override
Appends a human-readable name for this declaration into the given stream.
Location wrapper for a TemplateArgument.
Definition: TemplateBase.h:449
static ClassTemplatePartialSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
This template specialization was declared or defined by an explicit specialization (C++ [temp...
Definition: Specifiers.h:163
static VarTemplatePartialSpecializationDecl * Create(ASTContext &Context, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, TemplateParameterList *Params, VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo, StorageClass S, ArrayRef< TemplateArgument > Args, const TemplateArgumentListInfo &ArgInfos)
VarTemplateDecl * getPreviousDecl()
Retrieve the previous declaration of this variable template, or nullptr if no such declaration exists...
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2293
static FunctionTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty function template node.
static VarTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
A template argument list.
Definition: DeclTemplate.h:214
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:240
SourceLocation getDefaultArgumentLoc() const
Retrieve the location of the default argument, if any.
TemplateArgument * InjectedArgs
The set of "injected" template arguments used within this function template.
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, bool ParameterPack, TemplateTypeParmDecl *ParmDecl=nullptr) const
Retrieve the template type parameter type for a template parameter or parameter pack with the given d...
void AddSpecialization(ClassTemplateSpecializationDecl *D, void *InsertPos)
Insert the specified specialization knowing that it is not already in.
Defines the clang::SourceLocation class and associated facilities.
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299
static const ASTTemplateArgumentListInfo * Create(ASTContext &C, const TemplateArgumentListInfo &List)
TemplateParameterList(SourceLocation TemplateLoc, SourceLocation LAngleLoc, ArrayRef< NamedDecl *> Params, SourceLocation RAngleLoc, Expr *RequiresClause)
CommonBase * newCommon(ASTContext &C) const override
void addSpecializationImpl(llvm::FoldingSetVector< EntryType > &Specs, EntryType *Entry, void *InsertPos)
CommonBase * newCommon(ASTContext &C) const override
Provides information a specialization of a member of a class template, which may be a member function...
Definition: DeclTemplate.h:664
ClassTemplatePartialSpecializationDecl * findPartialSpecialization(ArrayRef< TemplateArgument > Args, void *&InsertPos)
Return the partial specialization with the provided arguments if it exists, otherwise return the inse...
static VarTemplateDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name, TemplateParameterList *Params, VarDecl *Decl)
Create a variable template node.
Declaration of a class template.
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.h:2908
QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const
getInjectedClassNameType - Return the unique reference to the injected class name type for the specif...
VarTemplatePartialSpecializationDecl * findPartialSpecInstantiatedFromMember(VarTemplatePartialSpecializationDecl *D)
Find a variable template partial specialization which was instantiated from the given member partial ...
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:91
SourceLocation getLAngleLoc() const
Definition: TemplateBase.h:570
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > & getSpecializations() const
Retrieve the set of function template specializations of this function template.
A trivial tuple used to represent a source range.
static VarTemplateSpecializationDecl * Create(ASTContext &Context, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo, StorageClass S, ArrayRef< TemplateArgument > Args)
This represents a decl that may have a name.
Definition: Decl.h:248
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Declaration of a friend template.
SourceLocation getRAngleLoc() const
Definition: TemplateBase.h:571
VarTemplateDecl * getDefinition()
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclTemplate.h:175
Defines enum values for all the target-independent builtin functions.
Declaration of a template function.
ClassTemplateSpecializationDecl(ASTContext &Context, Kind DK, TagKind TK, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, ClassTemplateDecl *SpecializedTemplate, ArrayRef< TemplateArgument > Args, ClassTemplateSpecializationDecl *PrevDecl)
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:97
llvm::FoldingSetVector< VarTemplatePartialSpecializationDecl > & getPartialSpecializations()
Retrieve the set of partial specializations of this class template.
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.