clang  9.0.0svn
DeclBase.cpp
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1 //===- DeclBase.cpp - 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 Decl and DeclContext classes.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/AST/DeclBase.h"
14 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/AttrIterator.h"
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclFriend.h"
22 #include "clang/AST/DeclObjC.h"
23 #include "clang/AST/DeclOpenMP.h"
24 #include "clang/AST/DeclTemplate.h"
27 #include "clang/AST/Stmt.h"
28 #include "clang/AST/Type.h"
30 #include "clang/Basic/LLVM.h"
35 #include "clang/Basic/TargetInfo.h"
36 #include "llvm/ADT/ArrayRef.h"
37 #include "llvm/ADT/PointerIntPair.h"
38 #include "llvm/ADT/SmallVector.h"
39 #include "llvm/ADT/StringRef.h"
40 #include "llvm/Support/Casting.h"
41 #include "llvm/Support/ErrorHandling.h"
42 #include "llvm/Support/MathExtras.h"
43 #include "llvm/Support/VersionTuple.h"
44 #include "llvm/Support/raw_ostream.h"
45 #include <algorithm>
46 #include <cassert>
47 #include <cstddef>
48 #include <string>
49 #include <tuple>
50 #include <utility>
51 
52 using namespace clang;
53 
54 //===----------------------------------------------------------------------===//
55 // Statistics
56 //===----------------------------------------------------------------------===//
57 
58 #define DECL(DERIVED, BASE) static int n##DERIVED##s = 0;
59 #define ABSTRACT_DECL(DECL)
60 #include "clang/AST/DeclNodes.inc"
61 
64 }
65 
66 #define DECL(DERIVED, BASE) \
67  static_assert(alignof(Decl) >= alignof(DERIVED##Decl), \
68  "Alignment sufficient after objects prepended to " #DERIVED);
69 #define ABSTRACT_DECL(DECL)
70 #include "clang/AST/DeclNodes.inc"
71 
72 void *Decl::operator new(std::size_t Size, const ASTContext &Context,
73  unsigned ID, std::size_t Extra) {
74  // Allocate an extra 8 bytes worth of storage, which ensures that the
75  // resulting pointer will still be 8-byte aligned.
76  static_assert(sizeof(unsigned) * 2 >= alignof(Decl),
77  "Decl won't be misaligned");
78  void *Start = Context.Allocate(Size + Extra + 8);
79  void *Result = (char*)Start + 8;
80 
81  unsigned *PrefixPtr = (unsigned *)Result - 2;
82 
83  // Zero out the first 4 bytes; this is used to store the owning module ID.
84  PrefixPtr[0] = 0;
85 
86  // Store the global declaration ID in the second 4 bytes.
87  PrefixPtr[1] = ID;
88 
89  return Result;
90 }
91 
92 void *Decl::operator new(std::size_t Size, const ASTContext &Ctx,
93  DeclContext *Parent, std::size_t Extra) {
94  assert(!Parent || &Parent->getParentASTContext() == &Ctx);
95  // With local visibility enabled, we track the owning module even for local
96  // declarations. We create the TU decl early and may not yet know what the
97  // LangOpts are, so conservatively allocate the storage.
98  if (Ctx.getLangOpts().trackLocalOwningModule() || !Parent) {
99  // Ensure required alignment of the resulting object by adding extra
100  // padding at the start if required.
101  size_t ExtraAlign =
102  llvm::OffsetToAlignment(sizeof(Module *), alignof(Decl));
103  auto *Buffer = reinterpret_cast<char *>(
104  ::operator new(ExtraAlign + sizeof(Module *) + Size + Extra, Ctx));
105  Buffer += ExtraAlign;
106  auto *ParentModule =
107  Parent ? cast<Decl>(Parent)->getOwningModule() : nullptr;
108  return new (Buffer) Module*(ParentModule) + 1;
109  }
110  return ::operator new(Size + Extra, Ctx);
111 }
112 
113 Module *Decl::getOwningModuleSlow() const {
114  assert(isFromASTFile() && "Not from AST file?");
116 }
117 
120 }
121 
122 const char *Decl::getDeclKindName() const {
123  switch (DeclKind) {
124  default: llvm_unreachable("Declaration not in DeclNodes.inc!");
125 #define DECL(DERIVED, BASE) case DERIVED: return #DERIVED;
126 #define ABSTRACT_DECL(DECL)
127 #include "clang/AST/DeclNodes.inc"
128  }
129 }
130 
131 void Decl::setInvalidDecl(bool Invalid) {
132  InvalidDecl = Invalid;
133  assert(!isa<TagDecl>(this) || !cast<TagDecl>(this)->isCompleteDefinition());
134  if (!Invalid) {
135  return;
136  }
137 
138  if (!isa<ParmVarDecl>(this)) {
139  // Defensive maneuver for ill-formed code: we're likely not to make it to
140  // a point where we set the access specifier, so default it to "public"
141  // to avoid triggering asserts elsewhere in the front end.
143  }
144 
145  // Marking a DecompositionDecl as invalid implies all the child BindingDecl's
146  // are invalid too.
147  if (auto *DD = dyn_cast<DecompositionDecl>(this)) {
148  for (auto *Binding : DD->bindings()) {
149  Binding->setInvalidDecl();
150  }
151  }
152 }
153 
154 const char *DeclContext::getDeclKindName() const {
155  switch (getDeclKind()) {
156 #define DECL(DERIVED, BASE) case Decl::DERIVED: return #DERIVED;
157 #define ABSTRACT_DECL(DECL)
158 #include "clang/AST/DeclNodes.inc"
159  }
160  llvm_unreachable("Declaration context not in DeclNodes.inc!");
161 }
162 
163 bool Decl::StatisticsEnabled = false;
165  StatisticsEnabled = true;
166 }
167 
169  llvm::errs() << "\n*** Decl Stats:\n";
170 
171  int totalDecls = 0;
172 #define DECL(DERIVED, BASE) totalDecls += n##DERIVED##s;
173 #define ABSTRACT_DECL(DECL)
174 #include "clang/AST/DeclNodes.inc"
175  llvm::errs() << " " << totalDecls << " decls total.\n";
176 
177  int totalBytes = 0;
178 #define DECL(DERIVED, BASE) \
179  if (n##DERIVED##s > 0) { \
180  totalBytes += (int)(n##DERIVED##s * sizeof(DERIVED##Decl)); \
181  llvm::errs() << " " << n##DERIVED##s << " " #DERIVED " decls, " \
182  << sizeof(DERIVED##Decl) << " each (" \
183  << n##DERIVED##s * sizeof(DERIVED##Decl) \
184  << " bytes)\n"; \
185  }
186 #define ABSTRACT_DECL(DECL)
187 #include "clang/AST/DeclNodes.inc"
188 
189  llvm::errs() << "Total bytes = " << totalBytes << "\n";
190 }
191 
192 void Decl::add(Kind k) {
193  switch (k) {
194 #define DECL(DERIVED, BASE) case DERIVED: ++n##DERIVED##s; break;
195 #define ABSTRACT_DECL(DECL)
196 #include "clang/AST/DeclNodes.inc"
197  }
198 }
199 
201  if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(this))
202  return TTP->isParameterPack();
203  if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(this))
204  return NTTP->isParameterPack();
205  if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(this))
206  return TTP->isParameterPack();
207  return false;
208 }
209 
210 bool Decl::isParameterPack() const {
211  if (const auto *Parm = dyn_cast<ParmVarDecl>(this))
212  return Parm->isParameterPack();
213 
214  return isTemplateParameterPack();
215 }
216 
218  if (auto *FD = dyn_cast<FunctionDecl>(this))
219  return FD;
220  if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(this))
221  return FTD->getTemplatedDecl();
222  return nullptr;
223 }
224 
225 bool Decl::isTemplateDecl() const {
226  return isa<TemplateDecl>(this);
227 }
228 
230  if (auto *FD = dyn_cast<FunctionDecl>(this))
231  return FD->getDescribedFunctionTemplate();
232  else if (auto *RD = dyn_cast<CXXRecordDecl>(this))
233  return RD->getDescribedClassTemplate();
234  else if (auto *VD = dyn_cast<VarDecl>(this))
235  return VD->getDescribedVarTemplate();
236  else if (auto *AD = dyn_cast<TypeAliasDecl>(this))
237  return AD->getDescribedAliasTemplate();
238 
239  return nullptr;
240 }
241 
242 bool Decl::isTemplated() const {
243  // A declaration is dependent if it is a template or a template pattern, or
244  // is within (lexcially for a friend, semantically otherwise) a dependent
245  // context.
246  // FIXME: Should local extern declarations be treated like friends?
247  if (auto *AsDC = dyn_cast<DeclContext>(this))
248  return AsDC->isDependentContext();
250  return DC->isDependentContext() || isTemplateDecl() || getDescribedTemplate();
251 }
252 
254  for (const DeclContext *DC = getDeclContext();
255  DC && !DC->isTranslationUnit() && !DC->isNamespace();
256  DC = DC->getParent())
257  if (DC->isFunctionOrMethod())
258  return DC;
259 
260  return nullptr;
261 }
262 
263 //===----------------------------------------------------------------------===//
264 // PrettyStackTraceDecl Implementation
265 //===----------------------------------------------------------------------===//
266 
267 void PrettyStackTraceDecl::print(raw_ostream &OS) const {
268  SourceLocation TheLoc = Loc;
269  if (TheLoc.isInvalid() && TheDecl)
270  TheLoc = TheDecl->getLocation();
271 
272  if (TheLoc.isValid()) {
273  TheLoc.print(OS, SM);
274  OS << ": ";
275  }
276 
277  OS << Message;
278 
279  if (const auto *DN = dyn_cast_or_null<NamedDecl>(TheDecl)) {
280  OS << " '";
281  DN->printQualifiedName(OS);
282  OS << '\'';
283  }
284  OS << '\n';
285 }
286 
287 //===----------------------------------------------------------------------===//
288 // Decl Implementation
289 //===----------------------------------------------------------------------===//
290 
291 // Out-of-line virtual method providing a home for Decl.
292 Decl::~Decl() = default;
293 
295  DeclCtx = DC;
296 }
297 
299  if (DC == getLexicalDeclContext())
300  return;
301 
302  if (isInSemaDC()) {
303  setDeclContextsImpl(getDeclContext(), DC, getASTContext());
304  } else {
305  getMultipleDC()->LexicalDC = DC;
306  }
307 
308  // FIXME: We shouldn't be changing the lexical context of declarations
309  // imported from AST files.
310  if (!isFromASTFile()) {
311  setModuleOwnershipKind(getModuleOwnershipKindForChildOf(DC));
312  if (hasOwningModule())
313  setLocalOwningModule(cast<Decl>(DC)->getOwningModule());
314  }
315 
316  assert(
318  getOwningModule()) &&
319  "hidden declaration has no owning module");
320 }
321 
322 void Decl::setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
323  ASTContext &Ctx) {
324  if (SemaDC == LexicalDC) {
325  DeclCtx = SemaDC;
326  } else {
327  auto *MDC = new (Ctx) Decl::MultipleDC();
328  MDC->SemanticDC = SemaDC;
329  MDC->LexicalDC = LexicalDC;
330  DeclCtx = MDC;
331  }
332 }
333 
335  const DeclContext *LDC = getLexicalDeclContext();
336  while (true) {
337  if (LDC->isFunctionOrMethod())
338  return true;
339  if (!isa<TagDecl>(LDC))
340  return false;
341  LDC = LDC->getLexicalParent();
342  }
343  return false;
344 }
345 
347  for (const DeclContext *DC = getDeclContext(); DC; DC = DC->getParent()) {
348  if (const auto *ND = dyn_cast<NamespaceDecl>(DC))
349  if (ND->isAnonymousNamespace())
350  return true;
351  }
352 
353  return false;
354 }
355 
357  return getDeclContext()->isStdNamespace();
358 }
359 
361  if (auto *TUD = dyn_cast<TranslationUnitDecl>(this))
362  return TUD;
363 
364  DeclContext *DC = getDeclContext();
365  assert(DC && "This decl is not contained in a translation unit!");
366 
367  while (!DC->isTranslationUnit()) {
368  DC = DC->getParent();
369  assert(DC && "This decl is not contained in a translation unit!");
370  }
371 
372  return cast<TranslationUnitDecl>(DC);
373 }
374 
377 }
378 
381 }
382 
383 unsigned Decl::getMaxAlignment() const {
384  if (!hasAttrs())
385  return 0;
386 
387  unsigned Align = 0;
388  const AttrVec &V = getAttrs();
389  ASTContext &Ctx = getASTContext();
390  specific_attr_iterator<AlignedAttr> I(V.begin()), E(V.end());
391  for (; I != E; ++I)
392  Align = std::max(Align, I->getAlignment(Ctx));
393  return Align;
394 }
395 
396 bool Decl::isUsed(bool CheckUsedAttr) const {
397  const Decl *CanonD = getCanonicalDecl();
398  if (CanonD->Used)
399  return true;
400 
401  // Check for used attribute.
402  // Ask the most recent decl, since attributes accumulate in the redecl chain.
403  if (CheckUsedAttr && getMostRecentDecl()->hasAttr<UsedAttr>())
404  return true;
405 
406  // The information may have not been deserialized yet. Force deserialization
407  // to complete the needed information.
408  return getMostRecentDecl()->getCanonicalDecl()->Used;
409 }
410 
412  if (isUsed(false))
413  return;
414 
415  if (C.getASTMutationListener())
417 
418  setIsUsed();
419 }
420 
421 bool Decl::isReferenced() const {
422  if (Referenced)
423  return true;
424 
425  // Check redeclarations.
426  for (const auto *I : redecls())
427  if (I->Referenced)
428  return true;
429 
430  return false;
431 }
432 
433 bool Decl::isExported() const {
434  if (isModulePrivate())
435  return false;
436  // Namespaces are always exported.
437  if (isa<TranslationUnitDecl>(this) || isa<NamespaceDecl>(this))
438  return true;
439  // Otherwise, this is a strictly lexical check.
440  for (auto *DC = getLexicalDeclContext(); DC; DC = DC->getLexicalParent()) {
441  if (cast<Decl>(DC)->isModulePrivate())
442  return false;
443  if (isa<ExportDecl>(DC))
444  return true;
445  }
446  return false;
447 }
448 
449 ExternalSourceSymbolAttr *Decl::getExternalSourceSymbolAttr() const {
450  const Decl *Definition = nullptr;
451  if (auto *ID = dyn_cast<ObjCInterfaceDecl>(this)) {
452  Definition = ID->getDefinition();
453  } else if (auto *PD = dyn_cast<ObjCProtocolDecl>(this)) {
454  Definition = PD->getDefinition();
455  } else if (auto *TD = dyn_cast<TagDecl>(this)) {
456  Definition = TD->getDefinition();
457  }
458  if (!Definition)
459  Definition = this;
460 
461  if (auto *attr = Definition->getAttr<ExternalSourceSymbolAttr>())
462  return attr;
463  if (auto *dcd = dyn_cast<Decl>(getDeclContext())) {
464  return dcd->getAttr<ExternalSourceSymbolAttr>();
465  }
466 
467  return nullptr;
468 }
469 
470 bool Decl::hasDefiningAttr() const {
471  return hasAttr<AliasAttr>() || hasAttr<IFuncAttr>();
472 }
473 
474 const Attr *Decl::getDefiningAttr() const {
475  if (auto *AA = getAttr<AliasAttr>())
476  return AA;
477  if (auto *IFA = getAttr<IFuncAttr>())
478  return IFA;
479  return nullptr;
480 }
481 
482 static StringRef getRealizedPlatform(const AvailabilityAttr *A,
483  const ASTContext &Context) {
484  // Check if this is an App Extension "platform", and if so chop off
485  // the suffix for matching with the actual platform.
486  StringRef RealizedPlatform = A->getPlatform()->getName();
487  if (!Context.getLangOpts().AppExt)
488  return RealizedPlatform;
489  size_t suffix = RealizedPlatform.rfind("_app_extension");
490  if (suffix != StringRef::npos)
491  return RealizedPlatform.slice(0, suffix);
492  return RealizedPlatform;
493 }
494 
495 /// Determine the availability of the given declaration based on
496 /// the target platform.
497 ///
498 /// When it returns an availability result other than \c AR_Available,
499 /// if the \p Message parameter is non-NULL, it will be set to a
500 /// string describing why the entity is unavailable.
501 ///
502 /// FIXME: Make these strings localizable, since they end up in
503 /// diagnostics.
505  const AvailabilityAttr *A,
506  std::string *Message,
507  VersionTuple EnclosingVersion) {
508  if (EnclosingVersion.empty())
509  EnclosingVersion = Context.getTargetInfo().getPlatformMinVersion();
510 
511  if (EnclosingVersion.empty())
512  return AR_Available;
513 
514  StringRef ActualPlatform = A->getPlatform()->getName();
515  StringRef TargetPlatform = Context.getTargetInfo().getPlatformName();
516 
517  // Match the platform name.
518  if (getRealizedPlatform(A, Context) != TargetPlatform)
519  return AR_Available;
520 
521  StringRef PrettyPlatformName
522  = AvailabilityAttr::getPrettyPlatformName(ActualPlatform);
523 
524  if (PrettyPlatformName.empty())
525  PrettyPlatformName = ActualPlatform;
526 
527  std::string HintMessage;
528  if (!A->getMessage().empty()) {
529  HintMessage = " - ";
530  HintMessage += A->getMessage();
531  }
532 
533  // Make sure that this declaration has not been marked 'unavailable'.
534  if (A->getUnavailable()) {
535  if (Message) {
536  Message->clear();
537  llvm::raw_string_ostream Out(*Message);
538  Out << "not available on " << PrettyPlatformName
539  << HintMessage;
540  }
541 
542  return AR_Unavailable;
543  }
544 
545  // Make sure that this declaration has already been introduced.
546  if (!A->getIntroduced().empty() &&
547  EnclosingVersion < A->getIntroduced()) {
548  if (Message) {
549  Message->clear();
550  llvm::raw_string_ostream Out(*Message);
551  VersionTuple VTI(A->getIntroduced());
552  Out << "introduced in " << PrettyPlatformName << ' '
553  << VTI << HintMessage;
554  }
555 
556  return A->getStrict() ? AR_Unavailable : AR_NotYetIntroduced;
557  }
558 
559  // Make sure that this declaration hasn't been obsoleted.
560  if (!A->getObsoleted().empty() && EnclosingVersion >= A->getObsoleted()) {
561  if (Message) {
562  Message->clear();
563  llvm::raw_string_ostream Out(*Message);
564  VersionTuple VTO(A->getObsoleted());
565  Out << "obsoleted in " << PrettyPlatformName << ' '
566  << VTO << HintMessage;
567  }
568 
569  return AR_Unavailable;
570  }
571 
572  // Make sure that this declaration hasn't been deprecated.
573  if (!A->getDeprecated().empty() && EnclosingVersion >= A->getDeprecated()) {
574  if (Message) {
575  Message->clear();
576  llvm::raw_string_ostream Out(*Message);
577  VersionTuple VTD(A->getDeprecated());
578  Out << "first deprecated in " << PrettyPlatformName << ' '
579  << VTD << HintMessage;
580  }
581 
582  return AR_Deprecated;
583  }
584 
585  return AR_Available;
586 }
587 
589  VersionTuple EnclosingVersion,
590  StringRef *RealizedPlatform) const {
591  if (auto *FTD = dyn_cast<FunctionTemplateDecl>(this))
592  return FTD->getTemplatedDecl()->getAvailability(Message, EnclosingVersion,
593  RealizedPlatform);
594 
596  std::string ResultMessage;
597 
598  for (const auto *A : attrs()) {
599  if (const auto *Deprecated = dyn_cast<DeprecatedAttr>(A)) {
600  if (Result >= AR_Deprecated)
601  continue;
602 
603  if (Message)
604  ResultMessage = Deprecated->getMessage();
605 
606  Result = AR_Deprecated;
607  continue;
608  }
609 
610  if (const auto *Unavailable = dyn_cast<UnavailableAttr>(A)) {
611  if (Message)
612  *Message = Unavailable->getMessage();
613  return AR_Unavailable;
614  }
615 
616  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
618  Message, EnclosingVersion);
619 
620  if (AR == AR_Unavailable) {
621  if (RealizedPlatform)
622  *RealizedPlatform = Availability->getPlatform()->getName();
623  return AR_Unavailable;
624  }
625 
626  if (AR > Result) {
627  Result = AR;
628  if (Message)
629  ResultMessage.swap(*Message);
630  }
631  continue;
632  }
633  }
634 
635  if (Message)
636  Message->swap(ResultMessage);
637  return Result;
638 }
639 
640 VersionTuple Decl::getVersionIntroduced() const {
641  const ASTContext &Context = getASTContext();
642  StringRef TargetPlatform = Context.getTargetInfo().getPlatformName();
643  for (const auto *A : attrs()) {
644  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
645  if (getRealizedPlatform(Availability, Context) != TargetPlatform)
646  continue;
647  if (!Availability->getIntroduced().empty())
648  return Availability->getIntroduced();
649  }
650  }
651  return {};
652 }
653 
654 bool Decl::canBeWeakImported(bool &IsDefinition) const {
655  IsDefinition = false;
656 
657  // Variables, if they aren't definitions.
658  if (const auto *Var = dyn_cast<VarDecl>(this)) {
659  if (Var->isThisDeclarationADefinition()) {
660  IsDefinition = true;
661  return false;
662  }
663  return true;
664 
665  // Functions, if they aren't definitions.
666  } else if (const auto *FD = dyn_cast<FunctionDecl>(this)) {
667  if (FD->hasBody()) {
668  IsDefinition = true;
669  return false;
670  }
671  return true;
672 
673  // Objective-C classes, if this is the non-fragile runtime.
674  } else if (isa<ObjCInterfaceDecl>(this) &&
676  return true;
677 
678  // Nothing else.
679  } else {
680  return false;
681  }
682 }
683 
684 bool Decl::isWeakImported() const {
685  bool IsDefinition;
686  if (!canBeWeakImported(IsDefinition))
687  return false;
688 
689  for (const auto *A : attrs()) {
690  if (isa<WeakImportAttr>(A))
691  return true;
692 
693  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
694  if (CheckAvailability(getASTContext(), Availability, nullptr,
695  VersionTuple()) == AR_NotYetIntroduced)
696  return true;
697  }
698  }
699 
700  return false;
701 }
702 
704  switch (DeclKind) {
705  case Function:
706  case CXXDeductionGuide:
707  case CXXMethod:
708  case CXXConstructor:
709  case ConstructorUsingShadow:
710  case CXXDestructor:
711  case CXXConversion:
712  case EnumConstant:
713  case Var:
714  case ImplicitParam:
715  case ParmVar:
716  case ObjCMethod:
717  case ObjCProperty:
718  case MSProperty:
719  return IDNS_Ordinary;
720  case Label:
721  return IDNS_Label;
722  case IndirectField:
723  return IDNS_Ordinary | IDNS_Member;
724 
725  case Binding:
726  case NonTypeTemplateParm:
727  case VarTemplate:
728  // These (C++-only) declarations are found by redeclaration lookup for
729  // tag types, so we include them in the tag namespace.
730  return IDNS_Ordinary | IDNS_Tag;
731 
732  case ObjCCompatibleAlias:
733  case ObjCInterface:
734  return IDNS_Ordinary | IDNS_Type;
735 
736  case Typedef:
737  case TypeAlias:
738  case TemplateTypeParm:
739  case ObjCTypeParam:
740  return IDNS_Ordinary | IDNS_Type;
741 
742  case UnresolvedUsingTypename:
744 
745  case UsingShadow:
746  return 0; // we'll actually overwrite this later
747 
748  case UnresolvedUsingValue:
749  return IDNS_Ordinary | IDNS_Using;
750 
751  case Using:
752  case UsingPack:
753  return IDNS_Using;
754 
755  case ObjCProtocol:
756  return IDNS_ObjCProtocol;
757 
758  case Field:
759  case ObjCAtDefsField:
760  case ObjCIvar:
761  return IDNS_Member;
762 
763  case Record:
764  case CXXRecord:
765  case Enum:
766  return IDNS_Tag | IDNS_Type;
767 
768  case Namespace:
769  case NamespaceAlias:
770  return IDNS_Namespace;
771 
772  case FunctionTemplate:
773  return IDNS_Ordinary;
774 
775  case ClassTemplate:
776  case TemplateTemplateParm:
777  case TypeAliasTemplate:
778  return IDNS_Ordinary | IDNS_Tag | IDNS_Type;
779 
780  case OMPDeclareReduction:
781  return IDNS_OMPReduction;
782 
783  case OMPDeclareMapper:
784  return IDNS_OMPMapper;
785 
786  // Never have names.
787  case Friend:
788  case FriendTemplate:
789  case AccessSpec:
790  case LinkageSpec:
791  case Export:
792  case FileScopeAsm:
793  case StaticAssert:
794  case ObjCPropertyImpl:
795  case PragmaComment:
796  case PragmaDetectMismatch:
797  case Block:
798  case Captured:
799  case TranslationUnit:
800  case ExternCContext:
801  case Decomposition:
802 
803  case UsingDirective:
804  case BuiltinTemplate:
805  case ClassTemplateSpecialization:
806  case ClassTemplatePartialSpecialization:
807  case ClassScopeFunctionSpecialization:
808  case VarTemplateSpecialization:
809  case VarTemplatePartialSpecialization:
810  case ObjCImplementation:
811  case ObjCCategory:
812  case ObjCCategoryImpl:
813  case Import:
814  case OMPThreadPrivate:
815  case OMPRequires:
816  case OMPCapturedExpr:
817  case Empty:
818  // Never looked up by name.
819  return 0;
820  }
821 
822  llvm_unreachable("Invalid DeclKind!");
823 }
824 
825 void Decl::setAttrsImpl(const AttrVec &attrs, ASTContext &Ctx) {
826  assert(!HasAttrs && "Decl already contains attrs.");
827 
828  AttrVec &AttrBlank = Ctx.getDeclAttrs(this);
829  assert(AttrBlank.empty() && "HasAttrs was wrong?");
830 
831  AttrBlank = attrs;
832  HasAttrs = true;
833 }
834 
836  if (!HasAttrs) return;
837 
838  HasAttrs = false;
840 }
841 
842 void Decl::addAttr(Attr *A) {
843  if (!hasAttrs()) {
844  setAttrs(AttrVec(1, A));
845  return;
846  }
847 
848  AttrVec &Attrs = getAttrs();
849  if (!A->isInherited()) {
850  Attrs.push_back(A);
851  return;
852  }
853 
854  // Attribute inheritance is processed after attribute parsing. To keep the
855  // order as in the source code, add inherited attributes before non-inherited
856  // ones.
857  auto I = Attrs.begin(), E = Attrs.end();
858  for (; I != E; ++I) {
859  if (!(*I)->isInherited())
860  break;
861  }
862  Attrs.insert(I, A);
863 }
864 
865 const AttrVec &Decl::getAttrs() const {
866  assert(HasAttrs && "No attrs to get!");
867  return getASTContext().getDeclAttrs(this);
868 }
869 
871  Decl::Kind DK = D->getDeclKind();
872  switch(DK) {
873 #define DECL(NAME, BASE)
874 #define DECL_CONTEXT(NAME) \
875  case Decl::NAME: \
876  return static_cast<NAME##Decl *>(const_cast<DeclContext *>(D));
877 #define DECL_CONTEXT_BASE(NAME)
878 #include "clang/AST/DeclNodes.inc"
879  default:
880 #define DECL(NAME, BASE)
881 #define DECL_CONTEXT_BASE(NAME) \
882  if (DK >= first##NAME && DK <= last##NAME) \
883  return static_cast<NAME##Decl *>(const_cast<DeclContext *>(D));
884 #include "clang/AST/DeclNodes.inc"
885  llvm_unreachable("a decl that inherits DeclContext isn't handled");
886  }
887 }
888 
890  Decl::Kind DK = D->getKind();
891  switch(DK) {
892 #define DECL(NAME, BASE)
893 #define DECL_CONTEXT(NAME) \
894  case Decl::NAME: \
895  return static_cast<NAME##Decl *>(const_cast<Decl *>(D));
896 #define DECL_CONTEXT_BASE(NAME)
897 #include "clang/AST/DeclNodes.inc"
898  default:
899 #define DECL(NAME, BASE)
900 #define DECL_CONTEXT_BASE(NAME) \
901  if (DK >= first##NAME && DK <= last##NAME) \
902  return static_cast<NAME##Decl *>(const_cast<Decl *>(D));
903 #include "clang/AST/DeclNodes.inc"
904  llvm_unreachable("a decl that inherits DeclContext isn't handled");
905  }
906 }
907 
909  // Special handling of FunctionDecl to avoid de-serializing the body from PCH.
910  // FunctionDecl stores EndRangeLoc for this purpose.
911  if (const auto *FD = dyn_cast<FunctionDecl>(this)) {
912  const FunctionDecl *Definition;
913  if (FD->hasBody(Definition))
914  return Definition->getSourceRange().getEnd();
915  return {};
916  }
917 
918  if (Stmt *Body = getBody())
919  return Body->getSourceRange().getEnd();
920 
921  return {};
922 }
923 
924 bool Decl::AccessDeclContextSanity() const {
925 #ifndef NDEBUG
926  // Suppress this check if any of the following hold:
927  // 1. this is the translation unit (and thus has no parent)
928  // 2. this is a template parameter (and thus doesn't belong to its context)
929  // 3. this is a non-type template parameter
930  // 4. the context is not a record
931  // 5. it's invalid
932  // 6. it's a C++0x static_assert.
933  // 7. it's a block literal declaration
934  if (isa<TranslationUnitDecl>(this) ||
935  isa<TemplateTypeParmDecl>(this) ||
936  isa<NonTypeTemplateParmDecl>(this) ||
937  !isa<CXXRecordDecl>(getDeclContext()) ||
938  isInvalidDecl() ||
939  isa<StaticAssertDecl>(this) ||
940  isa<BlockDecl>(this) ||
941  // FIXME: a ParmVarDecl can have ClassTemplateSpecialization
942  // as DeclContext (?).
943  isa<ParmVarDecl>(this) ||
944  // FIXME: a ClassTemplateSpecialization or CXXRecordDecl can have
945  // AS_none as access specifier.
946  isa<CXXRecordDecl>(this) ||
947  isa<ClassScopeFunctionSpecializationDecl>(this))
948  return true;
949 
950  assert(Access != AS_none &&
951  "Access specifier is AS_none inside a record decl");
952 #endif
953  return true;
954 }
955 
956 static Decl::Kind getKind(const Decl *D) { return D->getKind(); }
957 static Decl::Kind getKind(const DeclContext *DC) { return DC->getDeclKind(); }
958 
959 int64_t Decl::getID() const {
960  return getASTContext().getAllocator().identifyKnownAlignedObject<Decl>(this);
961 }
962 
963 const FunctionType *Decl::getFunctionType(bool BlocksToo) const {
964  QualType Ty;
965  if (const auto *D = dyn_cast<ValueDecl>(this))
966  Ty = D->getType();
967  else if (const auto *D = dyn_cast<TypedefNameDecl>(this))
968  Ty = D->getUnderlyingType();
969  else
970  return nullptr;
971 
972  if (Ty->isFunctionPointerType())
973  Ty = Ty->getAs<PointerType>()->getPointeeType();
974  else if (BlocksToo && Ty->isBlockPointerType())
975  Ty = Ty->getAs<BlockPointerType>()->getPointeeType();
976 
977  return Ty->getAs<FunctionType>();
978 }
979 
980 /// Starting at a given context (a Decl or DeclContext), look for a
981 /// code context that is not a closure (a lambda, block, etc.).
982 template <class T> static Decl *getNonClosureContext(T *D) {
983  if (getKind(D) == Decl::CXXMethod) {
984  auto *MD = cast<CXXMethodDecl>(D);
985  if (MD->getOverloadedOperator() == OO_Call &&
986  MD->getParent()->isLambda())
987  return getNonClosureContext(MD->getParent()->getParent());
988  return MD;
989  } else if (auto *FD = dyn_cast<FunctionDecl>(D))
990  return FD;
991  else if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
992  return MD;
993  else if (auto *BD = dyn_cast<BlockDecl>(D))
994  return getNonClosureContext(BD->getParent());
995  else if (auto *CD = dyn_cast<CapturedDecl>(D))
996  return getNonClosureContext(CD->getParent());
997  else
998  return nullptr;
999 }
1000 
1003 }
1004 
1007 }
1008 
1009 //===----------------------------------------------------------------------===//
1010 // DeclContext Implementation
1011 //===----------------------------------------------------------------------===//
1012 
1014  DeclContextBits.DeclKind = K;
1015  setHasExternalLexicalStorage(false);
1016  setHasExternalVisibleStorage(false);
1017  setNeedToReconcileExternalVisibleStorage(false);
1018  setHasLazyLocalLexicalLookups(false);
1019  setHasLazyExternalLexicalLookups(false);
1020  setUseQualifiedLookup(false);
1021 }
1022 
1023 bool DeclContext::classof(const Decl *D) {
1024  switch (D->getKind()) {
1025 #define DECL(NAME, BASE)
1026 #define DECL_CONTEXT(NAME) case Decl::NAME:
1027 #define DECL_CONTEXT_BASE(NAME)
1028 #include "clang/AST/DeclNodes.inc"
1029  return true;
1030  default:
1031 #define DECL(NAME, BASE)
1032 #define DECL_CONTEXT_BASE(NAME) \
1033  if (D->getKind() >= Decl::first##NAME && \
1034  D->getKind() <= Decl::last##NAME) \
1035  return true;
1036 #include "clang/AST/DeclNodes.inc"
1037  return false;
1038  }
1039 }
1040 
1041 DeclContext::~DeclContext() = default;
1042 
1043 /// Find the parent context of this context that will be
1044 /// used for unqualified name lookup.
1045 ///
1046 /// Generally, the parent lookup context is the semantic context. However, for
1047 /// a friend function the parent lookup context is the lexical context, which
1048 /// is the class in which the friend is declared.
1050  // FIXME: Find a better way to identify friends.
1051  if (isa<FunctionDecl>(this))
1052  if (getParent()->getRedeclContext()->isFileContext() &&
1053  getLexicalParent()->getRedeclContext()->isRecord())
1054  return getLexicalParent();
1055 
1056  return getParent();
1057 }
1058 
1060  return isNamespace() &&
1061  cast<NamespaceDecl>(this)->isInline();
1062 }
1063 
1065  if (!isNamespace())
1066  return false;
1067 
1068  const auto *ND = cast<NamespaceDecl>(this);
1069  if (ND->isInline()) {
1070  return ND->getParent()->isStdNamespace();
1071  }
1072 
1073  if (!getParent()->getRedeclContext()->isTranslationUnit())
1074  return false;
1075 
1076  const IdentifierInfo *II = ND->getIdentifier();
1077  return II && II->isStr("std");
1078 }
1079 
1081  if (isFileContext())
1082  return false;
1083 
1084  if (isa<ClassTemplatePartialSpecializationDecl>(this))
1085  return true;
1086 
1087  if (const auto *Record = dyn_cast<CXXRecordDecl>(this)) {
1088  if (Record->getDescribedClassTemplate())
1089  return true;
1090 
1091  if (Record->isDependentLambda())
1092  return true;
1093  }
1094 
1095  if (const auto *Function = dyn_cast<FunctionDecl>(this)) {
1096  if (Function->getDescribedFunctionTemplate())
1097  return true;
1098 
1099  // Friend function declarations are dependent if their *lexical*
1100  // context is dependent.
1101  if (cast<Decl>(this)->getFriendObjectKind())
1102  return getLexicalParent()->isDependentContext();
1103  }
1104 
1105  // FIXME: A variable template is a dependent context, but is not a
1106  // DeclContext. A context within it (such as a lambda-expression)
1107  // should be considered dependent.
1108 
1109  return getParent() && getParent()->isDependentContext();
1110 }
1111 
1113  if (getDeclKind() == Decl::Enum)
1114  return !cast<EnumDecl>(this)->isScoped();
1115  else if (getDeclKind() == Decl::LinkageSpec || getDeclKind() == Decl::Export)
1116  return true;
1117 
1118  return false;
1119 }
1120 
1121 static bool isLinkageSpecContext(const DeclContext *DC,
1123  while (DC->getDeclKind() != Decl::TranslationUnit) {
1124  if (DC->getDeclKind() == Decl::LinkageSpec)
1125  return cast<LinkageSpecDecl>(DC)->getLanguage() == ID;
1126  DC = DC->getLexicalParent();
1127  }
1128  return false;
1129 }
1130 
1133 }
1134 
1136  const DeclContext *DC = this;
1137  while (DC->getDeclKind() != Decl::TranslationUnit) {
1138  if (DC->getDeclKind() == Decl::LinkageSpec &&
1139  cast<LinkageSpecDecl>(DC)->getLanguage() == LinkageSpecDecl::lang_c)
1140  return cast<LinkageSpecDecl>(DC);
1141  DC = DC->getLexicalParent();
1142  }
1143  return nullptr;
1144 }
1145 
1148 }
1149 
1150 bool DeclContext::Encloses(const DeclContext *DC) const {
1151  if (getPrimaryContext() != this)
1152  return getPrimaryContext()->Encloses(DC);
1153 
1154  for (; DC; DC = DC->getParent())
1155  if (DC->getPrimaryContext() == this)
1156  return true;
1157  return false;
1158 }
1159 
1161  switch (getDeclKind()) {
1162  case Decl::TranslationUnit:
1163  case Decl::ExternCContext:
1164  case Decl::LinkageSpec:
1165  case Decl::Export:
1166  case Decl::Block:
1167  case Decl::Captured:
1168  case Decl::OMPDeclareReduction:
1169  case Decl::OMPDeclareMapper:
1170  // There is only one DeclContext for these entities.
1171  return this;
1172 
1173  case Decl::Namespace:
1174  // The original namespace is our primary context.
1175  return static_cast<NamespaceDecl *>(this)->getOriginalNamespace();
1176 
1177  case Decl::ObjCMethod:
1178  return this;
1179 
1180  case Decl::ObjCInterface:
1181  if (auto *Def = cast<ObjCInterfaceDecl>(this)->getDefinition())
1182  return Def;
1183  return this;
1184 
1185  case Decl::ObjCProtocol:
1186  if (auto *Def = cast<ObjCProtocolDecl>(this)->getDefinition())
1187  return Def;
1188  return this;
1189 
1190  case Decl::ObjCCategory:
1191  return this;
1192 
1193  case Decl::ObjCImplementation:
1194  case Decl::ObjCCategoryImpl:
1195  return this;
1196 
1197  default:
1198  if (getDeclKind() >= Decl::firstTag && getDeclKind() <= Decl::lastTag) {
1199  // If this is a tag type that has a definition or is currently
1200  // being defined, that definition is our primary context.
1201  auto *Tag = cast<TagDecl>(this);
1202 
1203  if (TagDecl *Def = Tag->getDefinition())
1204  return Def;
1205 
1206  if (const auto *TagTy = dyn_cast<TagType>(Tag->getTypeForDecl())) {
1207  // Note, TagType::getDecl returns the (partial) definition one exists.
1208  TagDecl *PossiblePartialDef = TagTy->getDecl();
1209  if (PossiblePartialDef->isBeingDefined())
1210  return PossiblePartialDef;
1211  } else {
1212  assert(isa<InjectedClassNameType>(Tag->getTypeForDecl()));
1213  }
1214 
1215  return Tag;
1216  }
1217 
1218  assert(getDeclKind() >= Decl::firstFunction &&
1219  getDeclKind() <= Decl::lastFunction &&
1220  "Unknown DeclContext kind");
1221  return this;
1222  }
1223 }
1224 
1225 void
1227  Contexts.clear();
1228 
1229  if (getDeclKind() != Decl::Namespace) {
1230  Contexts.push_back(this);
1231  return;
1232  }
1233 
1234  auto *Self = static_cast<NamespaceDecl *>(this);
1235  for (NamespaceDecl *N = Self->getMostRecentDecl(); N;
1236  N = N->getPreviousDecl())
1237  Contexts.push_back(N);
1238 
1239  std::reverse(Contexts.begin(), Contexts.end());
1240 }
1241 
1242 std::pair<Decl *, Decl *>
1244  bool FieldsAlreadyLoaded) {
1245  // Build up a chain of declarations via the Decl::NextInContextAndBits field.
1246  Decl *FirstNewDecl = nullptr;
1247  Decl *PrevDecl = nullptr;
1248  for (auto *D : Decls) {
1249  if (FieldsAlreadyLoaded && isa<FieldDecl>(D))
1250  continue;
1251 
1252  if (PrevDecl)
1253  PrevDecl->NextInContextAndBits.setPointer(D);
1254  else
1255  FirstNewDecl = D;
1256 
1257  PrevDecl = D;
1258  }
1259 
1260  return std::make_pair(FirstNewDecl, PrevDecl);
1261 }
1262 
1263 /// We have just acquired external visible storage, and we already have
1264 /// built a lookup map. For every name in the map, pull in the new names from
1265 /// the external storage.
1266 void DeclContext::reconcileExternalVisibleStorage() const {
1267  assert(hasNeedToReconcileExternalVisibleStorage() && LookupPtr);
1268  setNeedToReconcileExternalVisibleStorage(false);
1269 
1270  for (auto &Lookup : *LookupPtr)
1271  Lookup.second.setHasExternalDecls();
1272 }
1273 
1274 /// Load the declarations within this lexical storage from an
1275 /// external source.
1276 /// \return \c true if any declarations were added.
1277 bool
1278 DeclContext::LoadLexicalDeclsFromExternalStorage() const {
1279  ExternalASTSource *Source = getParentASTContext().getExternalSource();
1280  assert(hasExternalLexicalStorage() && Source && "No external storage?");
1281 
1282  // Notify that we have a DeclContext that is initializing.
1283  ExternalASTSource::Deserializing ADeclContext(Source);
1284 
1285  // Load the external declarations, if any.
1286  SmallVector<Decl*, 64> Decls;
1287  setHasExternalLexicalStorage(false);
1288  Source->FindExternalLexicalDecls(this, Decls);
1289 
1290  if (Decls.empty())
1291  return false;
1292 
1293  // We may have already loaded just the fields of this record, in which case
1294  // we need to ignore them.
1295  bool FieldsAlreadyLoaded = false;
1296  if (const auto *RD = dyn_cast<RecordDecl>(this))
1297  FieldsAlreadyLoaded = RD->hasLoadedFieldsFromExternalStorage();
1298 
1299  // Splice the newly-read declarations into the beginning of the list
1300  // of declarations.
1301  Decl *ExternalFirst, *ExternalLast;
1302  std::tie(ExternalFirst, ExternalLast) =
1303  BuildDeclChain(Decls, FieldsAlreadyLoaded);
1304  ExternalLast->NextInContextAndBits.setPointer(FirstDecl);
1305  FirstDecl = ExternalFirst;
1306  if (!LastDecl)
1307  LastDecl = ExternalLast;
1308  return true;
1309 }
1310 
1313  DeclarationName Name) {
1314  ASTContext &Context = DC->getParentASTContext();
1315  StoredDeclsMap *Map;
1316  if (!(Map = DC->LookupPtr))
1317  Map = DC->CreateStoredDeclsMap(Context);
1318  if (DC->hasNeedToReconcileExternalVisibleStorage())
1319  DC->reconcileExternalVisibleStorage();
1320 
1321  (*Map)[Name].removeExternalDecls();
1322 
1323  return DeclContext::lookup_result();
1324 }
1325 
1328  DeclarationName Name,
1329  ArrayRef<NamedDecl*> Decls) {
1330  ASTContext &Context = DC->getParentASTContext();
1331  StoredDeclsMap *Map;
1332  if (!(Map = DC->LookupPtr))
1333  Map = DC->CreateStoredDeclsMap(Context);
1334  if (DC->hasNeedToReconcileExternalVisibleStorage())
1335  DC->reconcileExternalVisibleStorage();
1336 
1337  StoredDeclsList &List = (*Map)[Name];
1338 
1339  // Clear out any old external visible declarations, to avoid quadratic
1340  // performance in the redeclaration checks below.
1341  List.removeExternalDecls();
1342 
1343  if (!List.isNull()) {
1344  // We have both existing declarations and new declarations for this name.
1345  // Some of the declarations may simply replace existing ones. Handle those
1346  // first.
1348  for (unsigned I = 0, N = Decls.size(); I != N; ++I)
1349  if (List.HandleRedeclaration(Decls[I], /*IsKnownNewer*/false))
1350  Skip.push_back(I);
1351  Skip.push_back(Decls.size());
1352 
1353  // Add in any new declarations.
1354  unsigned SkipPos = 0;
1355  for (unsigned I = 0, N = Decls.size(); I != N; ++I) {
1356  if (I == Skip[SkipPos])
1357  ++SkipPos;
1358  else
1359  List.AddSubsequentDecl(Decls[I]);
1360  }
1361  } else {
1362  // Convert the array to a StoredDeclsList.
1363  for (auto *D : Decls) {
1364  if (List.isNull())
1365  List.setOnlyValue(D);
1366  else
1367  List.AddSubsequentDecl(D);
1368  }
1369  }
1370 
1371  return List.getLookupResult();
1372 }
1373 
1375  if (hasExternalLexicalStorage())
1376  LoadLexicalDeclsFromExternalStorage();
1377  return decl_iterator(FirstDecl);
1378 }
1379 
1381  if (hasExternalLexicalStorage())
1382  LoadLexicalDeclsFromExternalStorage();
1383 
1384  return !FirstDecl;
1385 }
1386 
1388  return (D->getLexicalDeclContext() == this &&
1389  (D->NextInContextAndBits.getPointer() || D == LastDecl));
1390 }
1391 
1393  if (hasExternalLexicalStorage())
1394  LoadLexicalDeclsFromExternalStorage();
1395  return containsDecl(D);
1396 }
1397 
1398 /// shouldBeHidden - Determine whether a declaration which was declared
1399 /// within its semantic context should be invisible to qualified name lookup.
1400 static bool shouldBeHidden(NamedDecl *D) {
1401  // Skip unnamed declarations.
1402  if (!D->getDeclName())
1403  return true;
1404 
1405  // Skip entities that can't be found by name lookup into a particular
1406  // context.
1407  if ((D->getIdentifierNamespace() == 0 && !isa<UsingDirectiveDecl>(D)) ||
1408  D->isTemplateParameter())
1409  return true;
1410 
1411  // Skip friends and local extern declarations unless they're the first
1412  // declaration of the entity.
1413  if ((D->isLocalExternDecl() || D->getFriendObjectKind()) &&
1414  D != D->getCanonicalDecl())
1415  return true;
1416 
1417  // Skip template specializations.
1418  // FIXME: This feels like a hack. Should DeclarationName support
1419  // template-ids, or is there a better way to keep specializations
1420  // from being visible?
1421  if (isa<ClassTemplateSpecializationDecl>(D))
1422  return true;
1423  if (auto *FD = dyn_cast<FunctionDecl>(D))
1424  if (FD->isFunctionTemplateSpecialization())
1425  return true;
1426 
1427  return false;
1428 }
1429 
1431  assert(D->getLexicalDeclContext() == this &&
1432  "decl being removed from non-lexical context");
1433  assert((D->NextInContextAndBits.getPointer() || D == LastDecl) &&
1434  "decl is not in decls list");
1435 
1436  // Remove D from the decl chain. This is O(n) but hopefully rare.
1437  if (D == FirstDecl) {
1438  if (D == LastDecl)
1439  FirstDecl = LastDecl = nullptr;
1440  else
1441  FirstDecl = D->NextInContextAndBits.getPointer();
1442  } else {
1443  for (Decl *I = FirstDecl; true; I = I->NextInContextAndBits.getPointer()) {
1444  assert(I && "decl not found in linked list");
1445  if (I->NextInContextAndBits.getPointer() == D) {
1446  I->NextInContextAndBits.setPointer(D->NextInContextAndBits.getPointer());
1447  if (D == LastDecl) LastDecl = I;
1448  break;
1449  }
1450  }
1451  }
1452 
1453  // Mark that D is no longer in the decl chain.
1454  D->NextInContextAndBits.setPointer(nullptr);
1455 
1456  // Remove D from the lookup table if necessary.
1457  if (isa<NamedDecl>(D)) {
1458  auto *ND = cast<NamedDecl>(D);
1459 
1460  // Do not try to remove the declaration if that is invisible to qualified
1461  // lookup. E.g. template specializations are skipped.
1462  if (shouldBeHidden(ND))
1463  return;
1464 
1465  // Remove only decls that have a name
1466  if (!ND->getDeclName())
1467  return;
1468 
1469  auto *DC = D->getDeclContext();
1470  do {
1471  StoredDeclsMap *Map = DC->getPrimaryContext()->LookupPtr;
1472  if (Map) {
1473  StoredDeclsMap::iterator Pos = Map->find(ND->getDeclName());
1474  assert(Pos != Map->end() && "no lookup entry for decl");
1475  // Remove the decl only if it is contained.
1476  StoredDeclsList::DeclsTy *Vec = Pos->second.getAsVector();
1477  if ((Vec && is_contained(*Vec, ND)) || Pos->second.getAsDecl() == ND)
1478  Pos->second.remove(ND);
1479  }
1480  } while (DC->isTransparentContext() && (DC = DC->getParent()));
1481  }
1482 }
1483 
1485  assert(D->getLexicalDeclContext() == this &&
1486  "Decl inserted into wrong lexical context");
1487  assert(!D->getNextDeclInContext() && D != LastDecl &&
1488  "Decl already inserted into a DeclContext");
1489 
1490  if (FirstDecl) {
1491  LastDecl->NextInContextAndBits.setPointer(D);
1492  LastDecl = D;
1493  } else {
1494  FirstDecl = LastDecl = D;
1495  }
1496 
1497  // Notify a C++ record declaration that we've added a member, so it can
1498  // update its class-specific state.
1499  if (auto *Record = dyn_cast<CXXRecordDecl>(this))
1500  Record->addedMember(D);
1501 
1502  // If this is a newly-created (not de-serialized) import declaration, wire
1503  // it in to the list of local import declarations.
1504  if (!D->isFromASTFile()) {
1505  if (auto *Import = dyn_cast<ImportDecl>(D))
1506  D->getASTContext().addedLocalImportDecl(Import);
1507  }
1508 }
1509 
1511  addHiddenDecl(D);
1512 
1513  if (auto *ND = dyn_cast<NamedDecl>(D))
1514  ND->getDeclContext()->getPrimaryContext()->
1515  makeDeclVisibleInContextWithFlags(ND, false, true);
1516 }
1517 
1519  addHiddenDecl(D);
1520 
1521  if (auto *ND = dyn_cast<NamedDecl>(D))
1522  ND->getDeclContext()->getPrimaryContext()->
1523  makeDeclVisibleInContextWithFlags(ND, true, true);
1524 }
1525 
1526 /// buildLookup - Build the lookup data structure with all of the
1527 /// declarations in this DeclContext (and any other contexts linked
1528 /// to it or transparent contexts nested within it) and return it.
1529 ///
1530 /// Note that the produced map may miss out declarations from an
1531 /// external source. If it does, those entries will be marked with
1532 /// the 'hasExternalDecls' flag.
1534  assert(this == getPrimaryContext() && "buildLookup called on non-primary DC");
1535 
1536  if (!hasLazyLocalLexicalLookups() &&
1537  !hasLazyExternalLexicalLookups())
1538  return LookupPtr;
1539 
1541  collectAllContexts(Contexts);
1542 
1543  if (hasLazyExternalLexicalLookups()) {
1544  setHasLazyExternalLexicalLookups(false);
1545  for (auto *DC : Contexts) {
1546  if (DC->hasExternalLexicalStorage()) {
1547  bool LoadedDecls = DC->LoadLexicalDeclsFromExternalStorage();
1548  setHasLazyLocalLexicalLookups(
1549  hasLazyLocalLexicalLookups() | LoadedDecls );
1550  }
1551  }
1552 
1553  if (!hasLazyLocalLexicalLookups())
1554  return LookupPtr;
1555  }
1556 
1557  for (auto *DC : Contexts)
1558  buildLookupImpl(DC, hasExternalVisibleStorage());
1559 
1560  // We no longer have any lazy decls.
1561  setHasLazyLocalLexicalLookups(false);
1562  return LookupPtr;
1563 }
1564 
1565 /// buildLookupImpl - Build part of the lookup data structure for the
1566 /// declarations contained within DCtx, which will either be this
1567 /// DeclContext, a DeclContext linked to it, or a transparent context
1568 /// nested within it.
1569 void DeclContext::buildLookupImpl(DeclContext *DCtx, bool Internal) {
1570  for (auto *D : DCtx->noload_decls()) {
1571  // Insert this declaration into the lookup structure, but only if
1572  // it's semantically within its decl context. Any other decls which
1573  // should be found in this context are added eagerly.
1574  //
1575  // If it's from an AST file, don't add it now. It'll get handled by
1576  // FindExternalVisibleDeclsByName if needed. Exception: if we're not
1577  // in C++, we do not track external visible decls for the TU, so in
1578  // that case we need to collect them all here.
1579  if (auto *ND = dyn_cast<NamedDecl>(D))
1580  if (ND->getDeclContext() == DCtx && !shouldBeHidden(ND) &&
1581  (!ND->isFromASTFile() ||
1582  (isTranslationUnit() &&
1583  !getParentASTContext().getLangOpts().CPlusPlus)))
1584  makeDeclVisibleInContextImpl(ND, Internal);
1585 
1586  // If this declaration is itself a transparent declaration context
1587  // or inline namespace, add the members of this declaration of that
1588  // context (recursively).
1589  if (auto *InnerCtx = dyn_cast<DeclContext>(D))
1590  if (InnerCtx->isTransparentContext() || InnerCtx->isInlineNamespace())
1591  buildLookupImpl(InnerCtx, Internal);
1592  }
1593 }
1594 
1595 NamedDecl *const DeclContextLookupResult::SingleElementDummyList = nullptr;
1596 
1599  assert(getDeclKind() != Decl::LinkageSpec &&
1600  getDeclKind() != Decl::Export &&
1601  "should not perform lookups into transparent contexts");
1602 
1603  const DeclContext *PrimaryContext = getPrimaryContext();
1604  if (PrimaryContext != this)
1605  return PrimaryContext->lookup(Name);
1606 
1607  // If we have an external source, ensure that any later redeclarations of this
1608  // context have been loaded, since they may add names to the result of this
1609  // lookup (or add external visible storage).
1610  ExternalASTSource *Source = getParentASTContext().getExternalSource();
1611  if (Source)
1612  (void)cast<Decl>(this)->getMostRecentDecl();
1613 
1614  if (hasExternalVisibleStorage()) {
1615  assert(Source && "external visible storage but no external source?");
1616 
1617  if (hasNeedToReconcileExternalVisibleStorage())
1618  reconcileExternalVisibleStorage();
1619 
1620  StoredDeclsMap *Map = LookupPtr;
1621 
1622  if (hasLazyLocalLexicalLookups() ||
1623  hasLazyExternalLexicalLookups())
1624  // FIXME: Make buildLookup const?
1625  Map = const_cast<DeclContext*>(this)->buildLookup();
1626 
1627  if (!Map)
1628  Map = CreateStoredDeclsMap(getParentASTContext());
1629 
1630  // If we have a lookup result with no external decls, we are done.
1631  std::pair<StoredDeclsMap::iterator, bool> R =
1632  Map->insert(std::make_pair(Name, StoredDeclsList()));
1633  if (!R.second && !R.first->second.hasExternalDecls())
1634  return R.first->second.getLookupResult();
1635 
1636  if (Source->FindExternalVisibleDeclsByName(this, Name) || !R.second) {
1637  if (StoredDeclsMap *Map = LookupPtr) {
1638  StoredDeclsMap::iterator I = Map->find(Name);
1639  if (I != Map->end())
1640  return I->second.getLookupResult();
1641  }
1642  }
1643 
1644  return {};
1645  }
1646 
1647  StoredDeclsMap *Map = LookupPtr;
1648  if (hasLazyLocalLexicalLookups() ||
1649  hasLazyExternalLexicalLookups())
1650  Map = const_cast<DeclContext*>(this)->buildLookup();
1651 
1652  if (!Map)
1653  return {};
1654 
1655  StoredDeclsMap::iterator I = Map->find(Name);
1656  if (I == Map->end())
1657  return {};
1658 
1659  return I->second.getLookupResult();
1660 }
1661 
1664  assert(getDeclKind() != Decl::LinkageSpec &&
1665  getDeclKind() != Decl::Export &&
1666  "should not perform lookups into transparent contexts");
1667 
1668  DeclContext *PrimaryContext = getPrimaryContext();
1669  if (PrimaryContext != this)
1670  return PrimaryContext->noload_lookup(Name);
1671 
1672  loadLazyLocalLexicalLookups();
1673  StoredDeclsMap *Map = LookupPtr;
1674  if (!Map)
1675  return {};
1676 
1677  StoredDeclsMap::iterator I = Map->find(Name);
1678  return I != Map->end() ? I->second.getLookupResult()
1679  : lookup_result();
1680 }
1681 
1682 // If we have any lazy lexical declarations not in our lookup map, add them
1683 // now. Don't import any external declarations, not even if we know we have
1684 // some missing from the external visible lookups.
1685 void DeclContext::loadLazyLocalLexicalLookups() {
1686  if (hasLazyLocalLexicalLookups()) {
1688  collectAllContexts(Contexts);
1689  for (auto *Context : Contexts)
1690  buildLookupImpl(Context, hasExternalVisibleStorage());
1691  setHasLazyLocalLexicalLookups(false);
1692  }
1693 }
1694 
1696  SmallVectorImpl<NamedDecl *> &Results) {
1697  Results.clear();
1698 
1699  // If there's no external storage, just perform a normal lookup and copy
1700  // the results.
1701  if (!hasExternalVisibleStorage() && !hasExternalLexicalStorage() && Name) {
1702  lookup_result LookupResults = lookup(Name);
1703  Results.insert(Results.end(), LookupResults.begin(), LookupResults.end());
1704  return;
1705  }
1706 
1707  // If we have a lookup table, check there first. Maybe we'll get lucky.
1708  // FIXME: Should we be checking these flags on the primary context?
1709  if (Name && !hasLazyLocalLexicalLookups() &&
1710  !hasLazyExternalLexicalLookups()) {
1711  if (StoredDeclsMap *Map = LookupPtr) {
1712  StoredDeclsMap::iterator Pos = Map->find(Name);
1713  if (Pos != Map->end()) {
1714  Results.insert(Results.end(),
1715  Pos->second.getLookupResult().begin(),
1716  Pos->second.getLookupResult().end());
1717  return;
1718  }
1719  }
1720  }
1721 
1722  // Slow case: grovel through the declarations in our chain looking for
1723  // matches.
1724  // FIXME: If we have lazy external declarations, this will not find them!
1725  // FIXME: Should we CollectAllContexts and walk them all here?
1726  for (Decl *D = FirstDecl; D; D = D->getNextDeclInContext()) {
1727  if (auto *ND = dyn_cast<NamedDecl>(D))
1728  if (ND->getDeclName() == Name)
1729  Results.push_back(ND);
1730  }
1731 }
1732 
1734  DeclContext *Ctx = this;
1735 
1736  // In C, a record type is the redeclaration context for its fields only. If
1737  // we arrive at a record context after skipping anything else, we should skip
1738  // the record as well. Currently, this means skipping enumerations because
1739  // they're the only transparent context that can exist within a struct or
1740  // union.
1741  bool SkipRecords = getDeclKind() == Decl::Kind::Enum &&
1742  !getParentASTContext().getLangOpts().CPlusPlus;
1743 
1744  // Skip through contexts to get to the redeclaration context. Transparent
1745  // contexts are always skipped.
1746  while ((SkipRecords && Ctx->isRecord()) || Ctx->isTransparentContext())
1747  Ctx = Ctx->getParent();
1748  return Ctx;
1749 }
1750 
1752  DeclContext *Ctx = this;
1753  // Skip through non-namespace, non-translation-unit contexts.
1754  while (!Ctx->isFileContext())
1755  Ctx = Ctx->getParent();
1756  return Ctx->getPrimaryContext();
1757 }
1758 
1760  // Loop until we find a non-record context.
1761  RecordDecl *OutermostRD = nullptr;
1762  DeclContext *DC = this;
1763  while (DC->isRecord()) {
1764  OutermostRD = cast<RecordDecl>(DC);
1765  DC = DC->getLexicalParent();
1766  }
1767  return OutermostRD;
1768 }
1769 
1771  // For non-file contexts, this is equivalent to Equals.
1772  if (!isFileContext())
1773  return O->Equals(this);
1774 
1775  do {
1776  if (O->Equals(this))
1777  return true;
1778 
1779  const auto *NS = dyn_cast<NamespaceDecl>(O);
1780  if (!NS || !NS->isInline())
1781  break;
1782  O = NS->getParent();
1783  } while (O);
1784 
1785  return false;
1786 }
1787 
1789  DeclContext *PrimaryDC = this->getPrimaryContext();
1790  DeclContext *DeclDC = D->getDeclContext()->getPrimaryContext();
1791  // If the decl is being added outside of its semantic decl context, we
1792  // need to ensure that we eagerly build the lookup information for it.
1793  PrimaryDC->makeDeclVisibleInContextWithFlags(D, false, PrimaryDC == DeclDC);
1794 }
1795 
1796 void DeclContext::makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1797  bool Recoverable) {
1798  assert(this == getPrimaryContext() && "expected a primary DC");
1799 
1800  if (!isLookupContext()) {
1801  if (isTransparentContext())
1802  getParent()->getPrimaryContext()
1803  ->makeDeclVisibleInContextWithFlags(D, Internal, Recoverable);
1804  return;
1805  }
1806 
1807  // Skip declarations which should be invisible to name lookup.
1808  if (shouldBeHidden(D))
1809  return;
1810 
1811  // If we already have a lookup data structure, perform the insertion into
1812  // it. If we might have externally-stored decls with this name, look them
1813  // up and perform the insertion. If this decl was declared outside its
1814  // semantic context, buildLookup won't add it, so add it now.
1815  //
1816  // FIXME: As a performance hack, don't add such decls into the translation
1817  // unit unless we're in C++, since qualified lookup into the TU is never
1818  // performed.
1819  if (LookupPtr || hasExternalVisibleStorage() ||
1820  ((!Recoverable || D->getDeclContext() != D->getLexicalDeclContext()) &&
1821  (getParentASTContext().getLangOpts().CPlusPlus ||
1822  !isTranslationUnit()))) {
1823  // If we have lazily omitted any decls, they might have the same name as
1824  // the decl which we are adding, so build a full lookup table before adding
1825  // this decl.
1826  buildLookup();
1827  makeDeclVisibleInContextImpl(D, Internal);
1828  } else {
1829  setHasLazyLocalLexicalLookups(true);
1830  }
1831 
1832  // If we are a transparent context or inline namespace, insert into our
1833  // parent context, too. This operation is recursive.
1834  if (isTransparentContext() || isInlineNamespace())
1835  getParent()->getPrimaryContext()->
1836  makeDeclVisibleInContextWithFlags(D, Internal, Recoverable);
1837 
1838  auto *DCAsDecl = cast<Decl>(this);
1839  // Notify that a decl was made visible unless we are a Tag being defined.
1840  if (!(isa<TagDecl>(DCAsDecl) && cast<TagDecl>(DCAsDecl)->isBeingDefined()))
1841  if (ASTMutationListener *L = DCAsDecl->getASTMutationListener())
1842  L->AddedVisibleDecl(this, D);
1843 }
1844 
1845 void DeclContext::makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal) {
1846  // Find or create the stored declaration map.
1847  StoredDeclsMap *Map = LookupPtr;
1848  if (!Map) {
1849  ASTContext *C = &getParentASTContext();
1850  Map = CreateStoredDeclsMap(*C);
1851  }
1852 
1853  // If there is an external AST source, load any declarations it knows about
1854  // with this declaration's name.
1855  // If the lookup table contains an entry about this name it means that we
1856  // have already checked the external source.
1857  if (!Internal)
1858  if (ExternalASTSource *Source = getParentASTContext().getExternalSource())
1859  if (hasExternalVisibleStorage() &&
1860  Map->find(D->getDeclName()) == Map->end())
1861  Source->FindExternalVisibleDeclsByName(this, D->getDeclName());
1862 
1863  // Insert this declaration into the map.
1864  StoredDeclsList &DeclNameEntries = (*Map)[D->getDeclName()];
1865 
1866  if (Internal) {
1867  // If this is being added as part of loading an external declaration,
1868  // this may not be the only external declaration with this name.
1869  // In this case, we never try to replace an existing declaration; we'll
1870  // handle that when we finalize the list of declarations for this name.
1871  DeclNameEntries.setHasExternalDecls();
1872  DeclNameEntries.AddSubsequentDecl(D);
1873  return;
1874  }
1875 
1876  if (DeclNameEntries.isNull()) {
1877  DeclNameEntries.setOnlyValue(D);
1878  return;
1879  }
1880 
1881  if (DeclNameEntries.HandleRedeclaration(D, /*IsKnownNewer*/!Internal)) {
1882  // This declaration has replaced an existing one for which
1883  // declarationReplaces returns true.
1884  return;
1885  }
1886 
1887  // Put this declaration into the appropriate slot.
1888  DeclNameEntries.AddSubsequentDecl(D);
1889 }
1890 
1892  return cast<UsingDirectiveDecl>(*I);
1893 }
1894 
1895 /// Returns iterator range [First, Last) of UsingDirectiveDecls stored within
1896 /// this context.
1898  // FIXME: Use something more efficient than normal lookup for using
1899  // directives. In C++, using directives are looked up more than anything else.
1900  lookup_result Result = lookup(UsingDirectiveDecl::getName());
1901  return udir_range(Result.begin(), Result.end());
1902 }
1903 
1904 //===----------------------------------------------------------------------===//
1905 // Creation and Destruction of StoredDeclsMaps. //
1906 //===----------------------------------------------------------------------===//
1907 
1908 StoredDeclsMap *DeclContext::CreateStoredDeclsMap(ASTContext &C) const {
1909  assert(!LookupPtr && "context already has a decls map");
1910  assert(getPrimaryContext() == this &&
1911  "creating decls map on non-primary context");
1912 
1913  StoredDeclsMap *M;
1914  bool Dependent = isDependentContext();
1915  if (Dependent)
1916  M = new DependentStoredDeclsMap();
1917  else
1918  M = new StoredDeclsMap();
1919  M->Previous = C.LastSDM;
1920  C.LastSDM = llvm::PointerIntPair<StoredDeclsMap*,1>(M, Dependent);
1921  LookupPtr = M;
1922  return M;
1923 }
1924 
1925 void ASTContext::ReleaseDeclContextMaps() {
1926  // It's okay to delete DependentStoredDeclsMaps via a StoredDeclsMap
1927  // pointer because the subclass doesn't add anything that needs to
1928  // be deleted.
1929  StoredDeclsMap::DestroyAll(LastSDM.getPointer(), LastSDM.getInt());
1930 }
1931 
1932 void StoredDeclsMap::DestroyAll(StoredDeclsMap *Map, bool Dependent) {
1933  while (Map) {
1934  // Advance the iteration before we invalidate memory.
1935  llvm::PointerIntPair<StoredDeclsMap*,1> Next = Map->Previous;
1936 
1937  if (Dependent)
1938  delete static_cast<DependentStoredDeclsMap*>(Map);
1939  else
1940  delete Map;
1941 
1942  Map = Next.getPointer();
1943  Dependent = Next.getInt();
1944  }
1945 }
1946 
1949  const PartialDiagnostic &PDiag) {
1950  assert(Parent->isDependentContext()
1951  && "cannot iterate dependent diagnostics of non-dependent context");
1952  Parent = Parent->getPrimaryContext();
1953  if (!Parent->LookupPtr)
1954  Parent->CreateStoredDeclsMap(C);
1955 
1956  auto *Map = static_cast<DependentStoredDeclsMap *>(Parent->LookupPtr);
1957 
1958  // Allocate the copy of the PartialDiagnostic via the ASTContext's
1959  // BumpPtrAllocator, rather than the ASTContext itself.
1960  PartialDiagnostic::Storage *DiagStorage = nullptr;
1961  if (PDiag.hasStorage())
1962  DiagStorage = new (C) PartialDiagnostic::Storage;
1963 
1964  auto *DD = new (C) DependentDiagnostic(PDiag, DiagStorage);
1965 
1966  // TODO: Maybe we shouldn't reverse the order during insertion.
1967  DD->NextDiagnostic = Map->FirstDiagnostic;
1968  Map->FirstDiagnostic = DD;
1969 
1970  return DD;
1971 }
static StringRef getRealizedPlatform(const AvailabilityAttr *A, const ASTContext &Context)
Definition: DeclBase.cpp:482
Defines the clang::ASTContext interface.
Represents a function declaration or definition.
Definition: Decl.h:1737
AttrVec & getDeclAttrs(const Decl *D)
Retrieve the attributes for the given declaration.
void localUncachedLookup(DeclarationName Name, SmallVectorImpl< NamedDecl *> &Results)
A simplistic name lookup mechanism that performs name lookup into this declaration context without co...
Definition: DeclBase.cpp:1695
VersionTuple getPlatformMinVersion() const
Retrieve the minimum desired version of the platform, to which the program should be compiled...
Definition: TargetInfo.h:1224
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:889
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:754
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2542
QualType getPointeeType() const
Definition: Type.h:2555
static bool shouldBeHidden(NamedDecl *D)
shouldBeHidden - Determine whether a declaration which was declared within its semantic context shoul...
Definition: DeclBase.cpp:1400
A (possibly-)qualified type.
Definition: Type.h:634
bool isBlockPointerType() const
Definition: Type.h:6309
TagDecl * getDefinition() const
Returns the TagDecl that actually defines this struct/union/class/enum.
Definition: Decl.cpp:3905
const char * getDeclKindName() const
Definition: DeclBase.cpp:122
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:242
void AddSubsequentDecl(NamedDecl *D)
AddSubsequentDecl - This is called on the second and later decl when it is not a redeclaration to mer...
virtual void FindExternalLexicalDecls(const DeclContext *DC, llvm::function_ref< bool(Decl::Kind)> IsKindWeWant, SmallVectorImpl< Decl *> &Result)
Finds all declarations lexically contained within the given DeclContext, after applying an optional f...
RAII class for safely pairing a StartedDeserializing call with FinishedDeserializing.
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c.h:67
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:870
virtual Stmt * getBody() const
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: DeclBase.h:981
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:477
static bool isLinkageSpecContext(const DeclContext *DC, LinkageSpecDecl::LanguageIDs ID)
Definition: DeclBase.cpp:1121
Stmt - This represents one statement.
Definition: Stmt.h:65
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3360
C Language Family Type Representation.
const char * getDeclKindName() const
Definition: DeclBase.cpp:154
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:34
static void add(Kind k)
Definition: DeclBase.cpp:192
Defines the C++ template declaration subclasses.
Decl * getPreviousDecl()
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:955
Defines types useful for describing an Objective-C runtime.
Represent a C++ namespace.
Definition: Decl.h:514
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:689
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:794
static Decl * getNonClosureContext(T *D)
Starting at a given context (a Decl or DeclContext), look for a code context that is not a closure (a...
Definition: DeclBase.cpp:982
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:253
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:323
bool HandleRedeclaration(NamedDecl *D, bool IsKnownNewer)
HandleRedeclaration - If this is a redeclaration of an existing decl, replace the old one with D and ...
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:749
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:379
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6761
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:118
bool isExternCContext() const
Determines whether this context or some of its ancestors is a linkage specification context that spec...
Definition: DeclBase.cpp:1131
bool isInvalidDecl() const
Definition: DeclBase.h:544
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:449
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:210
void removeDecl(Decl *D)
Removes a declaration from this context.
Definition: DeclBase.cpp:1430
bool hasWeakClassImport() const
Does this runtime support weakly importing classes?
Definition: ObjCRuntime.h:361
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:130
bool isLexicallyWithinFunctionOrMethod() const
Returns true if this declaration lexically is inside a function.
Definition: DeclBase.cpp:334
Represents a struct/union/class.
Definition: Decl.h:3592
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
bool Encloses(const DeclContext *DC) const
Determine whether this declaration context encloses the declaration context DC.
Definition: DeclBase.cpp:1150
One of these records is kept for each identifier that is lexed.
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:346
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
static DeclContextLookupResult SetExternalVisibleDeclsForName(const DeclContext *DC, DeclarationName Name, ArrayRef< NamedDecl *> Decls)
Definition: DeclBase.cpp:1327
QualType getPointeeType() const
Definition: Type.h:2659
void print(raw_ostream &OS, const SourceManager &SM) const
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1189
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1875
Describes a module or submodule.
Definition: Module.h:64
virtual void updateOutOfDateIdentifier(IdentifierInfo &II)
Update an out-of-date identifier.
DeclContext * getEnclosingNamespaceContext()
Retrieve the nearest enclosing namespace context.
Definition: DeclBase.cpp:1751
virtual bool FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name)
Find all declarations with the given name in the given context, and add them to the context by callin...
Namespaces, declared with &#39;namespace foo {}&#39;.
Definition: DeclBase.h:140
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:421
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:781
StoredDeclsMap * buildLookup()
Ensure the lookup structure is fully-built and return it.
Definition: DeclBase.cpp:1533
static DeclContextLookupResult SetNoExternalVisibleDeclsForName(const DeclContext *DC, DeclarationName Name)
Definition: DeclBase.cpp:1312
ASTContext & getASTContext() const
Definition: Decl.h:119
void eraseDeclAttrs(const Decl *D)
Erase the attributes corresponding to the given declaration.
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:823
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:117
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:741
Represents a linkage specification.
Definition: DeclCXX.h:2833
bool isExported() const
Whether this declaration is exported (by virtue of being lexically within an ExportDecl or by being a...
Definition: DeclBase.cpp:433
Ordinary names.
Definition: DeclBase.h:144
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:872
void addDeclInternal(Decl *D)
Add the declaration D into this context, but suppress searches for external declarations with the sam...
Definition: DeclBase.cpp:1518
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1598
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:72
NodeId Parent
Definition: ASTDiff.cpp:191
Decl * getNextDeclInContext()
Definition: DeclBase.h:426
bool canBeWeakImported(bool &IsDefinition) const
Determines whether this symbol can be weak-imported, e.g., whether it would be well-formed to add the...
Definition: DeclBase.cpp:654
udir_range using_directives() const
Returns iterator range [First, Last) of UsingDirectiveDecls stored within this context.
Definition: DeclBase.cpp:1897
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:588
Objective C @protocol.
Definition: DeclBase.h:147
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2281
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2008
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:963
void removeExternalDecls()
Remove any declarations which were imported from an external AST source.
int64_t getID() const
Definition: DeclBase.cpp:959
bool isInlineNamespace() const
Definition: DeclBase.cpp:1059
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1771
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:474
Defines the clang::LangOptions interface.
std::string Label
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:703
bool containsDecl(Decl *D) const
Checks whether a declaration is in this context.
Definition: DeclBase.cpp:1387
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
This declaration is an OpenMP user defined reduction construction.
Definition: DeclBase.h:178
bool InEnclosingNamespaceSetOf(const DeclContext *NS) const
Test if this context is part of the enclosing namespace set of the context NS, as defined in C++0x [n...
Definition: DeclBase.cpp:1770
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:970
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1055
bool isFileContext() const
Definition: DeclBase.h:1821
DeclContext * getDeclContext()
Definition: DeclBase.h:429
lookup_result noload_lookup(DeclarationName Name)
Find the declarations with the given name that are visible within this context; don&#39;t attempt to retr...
Definition: DeclBase.cpp:1663
Decl * getNonClosureAncestor()
Find the nearest non-closure ancestor of this context, i.e.
Definition: DeclBase.cpp:1005
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2425
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:200
bool containsDeclAndLoad(Decl *D) const
Checks whether a declaration is in this context.
Definition: DeclBase.cpp:1392
This declaration is an OpenMP user defined mapper.
Definition: DeclBase.h:181
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
bool isFunctionOrMethod() const
Definition: DeclBase.h:1803
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:206
This declaration has an owning module, and is visible when that module is imported.
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:383
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1755
void collectAllContexts(SmallVectorImpl< DeclContext *> &Contexts)
Collects all of the declaration contexts that are semantically connected to this declaration context...
Definition: DeclBase.cpp:1226
SourceLocation getEnd() const
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1080
The result type of a method or function.
const SourceManager & SM
Definition: Format.cpp:1489
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:294
SmallVector< Attr *, 4 > AttrVec
AttrVec - A vector of Attr, which is how they are stored on the AST.
Definition: AttrIterator.h:29
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1106
virtual void DeclarationMarkedUsed(const Decl *D)
A declaration is marked used which was not previously marked used.
bool decls_empty() const
Definition: DeclBase.cpp:1380
AttrVec & getAttrs()
Definition: DeclBase.h:481
bool hasAttrs() const
Definition: DeclBase.h:475
Abstract interface for external sources of AST nodes.
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:225
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1748
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1788
DeclContext::lookup_result getLookupResult()
getLookupResult - Return an array of all the decls that this list represents.
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:217
StringRef getPlatformName() const
Retrieve the name of the platform as it is used in the availability attribute.
Definition: TargetInfo.h:1220
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:640
Encodes a location in the source.
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:136
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:786
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1374
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3063
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:375
bool isStdNamespace() const
Definition: DeclBase.cpp:1064
This file defines OpenMP nodes for declarative directives.
void print(raw_ostream &OS) const override
Definition: DeclBase.cpp:267
DeclContext(Decl::Kind K)
Definition: DeclBase.cpp:1013
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:697
UsingDirectiveDecl * operator*() const
Definition: DeclBase.cpp:1891
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:396
An array of decls optimized for the common case of only containing one entry.
void dropAttrs()
Definition: DeclBase.cpp:835
bool isWeakImported() const
Determine whether this is a weak-imported symbol.
Definition: DeclBase.cpp:684
void * Allocate(size_t Size, unsigned Align=8) const
Definition: ASTContext.h:668
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1957
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:943
Dataflow Directional Tag Classes.
void updateOutOfDate(IdentifierInfo &II) const
Update a potentially out-of-date declaration.
Definition: DeclBase.cpp:62
bool isValid() const
Return true if this is a valid SourceLocation object.
virtual Module * getModule(unsigned ID)
Retrieve the module that corresponds to the given module ID.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1265
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:398
bool isRecord() const
Definition: DeclBase.h:1830
attr_range attrs() const
Definition: DeclBase.h:492
RecordDecl * getOuterLexicalRecordContext()
Retrieve the outermost lexically enclosing record context.
Definition: DeclBase.cpp:1759
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:423
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:1001
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:125
llvm::BumpPtrAllocator & getAllocator() const
Definition: ASTContext.h:664
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1082
A dependently-generated diagnostic.
Pointer to a block type.
Definition: Type.h:2644
static DependentDiagnostic * Create(ASTContext &Context, DeclContext *Parent, AccessNonce _, SourceLocation Loc, bool IsMemberAccess, AccessSpecifier AS, NamedDecl *TargetDecl, CXXRecordDecl *NamingClass, QualType BaseObjectType, const PartialDiagnostic &PDiag)
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:564
LanguageIDs
Represents the language in a linkage specification.
Definition: DeclCXX.h:2844
T * getAttr() const
Definition: DeclBase.h:529
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:709
virtual ~Decl()
void setOnlyValue(NamedDecl *ND)
DeclContext * getRedeclContext()
getRedeclContext - Retrieve the context in which an entity conflicts with other entities of the same ...
Definition: DeclBase.cpp:1733
const LinkageSpecDecl * getExternCContext() const
Retrieve the nearest enclosing C linkage specification context.
Definition: DeclBase.cpp:1135
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1510
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:411
ASTMutationListener * getASTMutationListener() const
Retrieve a pointer to the AST mutation listener associated with this AST context, if any...
Definition: ASTContext.h:1097
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
Defines the clang::SourceLocation class and associated facilities.
DeclContextLookupResult lookup_result
Definition: DeclBase.h:2204
void addHiddenDecl(Decl *D)
Add the declaration D to this context without modifying any lookup tables.
Definition: DeclBase.cpp:1484
static std::pair< Decl *, Decl * > BuildDeclChain(ArrayRef< Decl *> Decls, bool FieldsAlreadyLoaded)
Build up a chain of declarations.
Definition: DeclBase.cpp:1243
bool isInherited() const
Definition: Attr.h:97
DeclContext * getLookupParent()
Find the parent context of this context that will be used for unqualified name lookup.
Definition: DeclBase.cpp:1049
void addAttr(Attr *A)
Definition: DeclBase.cpp:842
static bool classof(const Decl *D)
Definition: DeclBase.cpp:1023
Defines the clang::TargetInfo interface.
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1784
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:3636
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:89
__DEVICE__ int max(int __a, int __b)
The top declaration context.
Definition: Decl.h:107
static void DestroyAll(StoredDeclsMap *Map, bool Dependent)
Definition: DeclBase.cpp:1932
static void PrintStats()
Definition: DeclBase.cpp:168
NamedDecl * getMostRecentDecl()
Definition: Decl.h:445
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1160
bool trackLocalOwningModule() const
Do we need to track the owning module for a local declaration?
Definition: LangOptions.h:267
static void EnableStatistics()
Definition: DeclBase.cpp:164
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:598
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:298
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1826
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:459
TemplateDecl * getDescribedTemplate() const
If this is a declaration that describes some template, this method returns that template declaration...
Definition: DeclBase.cpp:229
Represents C++ using-directive.
Definition: DeclCXX.h:2923
bool hasDefiningAttr() const
Return true if this declaration has an attribute which acts as definition of the entity, such as &#39;alias&#39; or &#39;ifunc&#39;.
Definition: DeclBase.cpp:470
bool isFunctionPointerType() const
Definition: Type.h:6325
void addedLocalImportDecl(ImportDecl *Import)
Notify the AST context that a new import declaration has been parsed or implicitly created within thi...
bool isInStdNamespace() const
Definition: DeclBase.cpp:356
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:360
const LangOptions & getLangOpts() const
Definition: ASTContext.h:706
bool isExternCXXContext() const
Determines whether this context or some of its ancestors is a linkage specification context that spec...
Definition: DeclBase.cpp:1146
bool isTemplated() const
Determine whether this declaration is a templated entity (whether it is.
Definition: DeclBase.cpp:242
SourceLocation getBodyRBrace() const
getBodyRBrace - Gets the right brace of the body, if a body exists.
Definition: DeclBase.cpp:908
Attr - This represents one attribute.
Definition: Attr.h:43
static AvailabilityResult CheckAvailability(ASTContext &Context, const AvailabilityAttr *A, std::string *Message, VersionTuple EnclosingVersion)
Determine the availability of the given declaration based on the target platform. ...
Definition: DeclBase.cpp:504
bool isBeingDefined() const
Return true if this decl is currently being defined.
Definition: Decl.h:3188
This declaration is a using declaration.
Definition: DeclBase.h:163
bool isTransparentContext() const
isTransparentContext - Determines whether this context is a "transparent" context, meaning that the members declared in this context are semantically declared in the nearest enclosing non-transparent (opaque) context but are lexically declared in this context.
Definition: DeclBase.cpp:1112