clang  8.0.0svn
DeclBase.cpp
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1 //===- DeclBase.cpp - Declaration AST Node Implementation -----------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Decl and DeclContext classes.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/DeclBase.h"
15 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/Attr.h"
18 #include "clang/AST/AttrIterator.h"
19 #include "clang/AST/Decl.h"
20 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclFriend.h"
23 #include "clang/AST/DeclObjC.h"
24 #include "clang/AST/DeclOpenMP.h"
25 #include "clang/AST/DeclTemplate.h"
28 #include "clang/AST/Stmt.h"
29 #include "clang/AST/Type.h"
31 #include "clang/Basic/LLVM.h"
36 #include "clang/Basic/TargetInfo.h"
37 #include "llvm/ADT/ArrayRef.h"
38 #include "llvm/ADT/PointerIntPair.h"
39 #include "llvm/ADT/SmallVector.h"
40 #include "llvm/ADT/StringRef.h"
41 #include "llvm/Support/Casting.h"
42 #include "llvm/Support/ErrorHandling.h"
43 #include "llvm/Support/MathExtras.h"
44 #include "llvm/Support/VersionTuple.h"
45 #include "llvm/Support/raw_ostream.h"
46 #include <algorithm>
47 #include <cassert>
48 #include <cstddef>
49 #include <string>
50 #include <tuple>
51 #include <utility>
52 
53 using namespace clang;
54 
55 //===----------------------------------------------------------------------===//
56 // Statistics
57 //===----------------------------------------------------------------------===//
58 
59 #define DECL(DERIVED, BASE) static int n##DERIVED##s = 0;
60 #define ABSTRACT_DECL(DECL)
61 #include "clang/AST/DeclNodes.inc"
62 
65 }
66 
67 #define DECL(DERIVED, BASE) \
68  static_assert(alignof(Decl) >= alignof(DERIVED##Decl), \
69  "Alignment sufficient after objects prepended to " #DERIVED);
70 #define ABSTRACT_DECL(DECL)
71 #include "clang/AST/DeclNodes.inc"
72 
73 void *Decl::operator new(std::size_t Size, const ASTContext &Context,
74  unsigned ID, std::size_t Extra) {
75  // Allocate an extra 8 bytes worth of storage, which ensures that the
76  // resulting pointer will still be 8-byte aligned.
77  static_assert(sizeof(unsigned) * 2 >= alignof(Decl),
78  "Decl won't be misaligned");
79  void *Start = Context.Allocate(Size + Extra + 8);
80  void *Result = (char*)Start + 8;
81 
82  unsigned *PrefixPtr = (unsigned *)Result - 2;
83 
84  // Zero out the first 4 bytes; this is used to store the owning module ID.
85  PrefixPtr[0] = 0;
86 
87  // Store the global declaration ID in the second 4 bytes.
88  PrefixPtr[1] = ID;
89 
90  return Result;
91 }
92 
93 void *Decl::operator new(std::size_t Size, const ASTContext &Ctx,
94  DeclContext *Parent, std::size_t Extra) {
95  assert(!Parent || &Parent->getParentASTContext() == &Ctx);
96  // With local visibility enabled, we track the owning module even for local
97  // declarations. We create the TU decl early and may not yet know what the
98  // LangOpts are, so conservatively allocate the storage.
99  if (Ctx.getLangOpts().trackLocalOwningModule() || !Parent) {
100  // Ensure required alignment of the resulting object by adding extra
101  // padding at the start if required.
102  size_t ExtraAlign =
103  llvm::OffsetToAlignment(sizeof(Module *), alignof(Decl));
104  auto *Buffer = reinterpret_cast<char *>(
105  ::operator new(ExtraAlign + sizeof(Module *) + Size + Extra, Ctx));
106  Buffer += ExtraAlign;
107  auto *ParentModule =
108  Parent ? cast<Decl>(Parent)->getOwningModule() : nullptr;
109  return new (Buffer) Module*(ParentModule) + 1;
110  }
111  return ::operator new(Size + Extra, Ctx);
112 }
113 
114 Module *Decl::getOwningModuleSlow() const {
115  assert(isFromASTFile() && "Not from AST file?");
117 }
118 
121 }
122 
123 const char *Decl::getDeclKindName() const {
124  switch (DeclKind) {
125  default: llvm_unreachable("Declaration not in DeclNodes.inc!");
126 #define DECL(DERIVED, BASE) case DERIVED: return #DERIVED;
127 #define ABSTRACT_DECL(DECL)
128 #include "clang/AST/DeclNodes.inc"
129  }
130 }
131 
132 void Decl::setInvalidDecl(bool Invalid) {
133  InvalidDecl = Invalid;
134  assert(!isa<TagDecl>(this) || !cast<TagDecl>(this)->isCompleteDefinition());
135  if (!Invalid) {
136  return;
137  }
138 
139  if (!isa<ParmVarDecl>(this)) {
140  // Defensive maneuver for ill-formed code: we're likely not to make it to
141  // a point where we set the access specifier, so default it to "public"
142  // to avoid triggering asserts elsewhere in the front end.
144  }
145 
146  // Marking a DecompositionDecl as invalid implies all the child BindingDecl's
147  // are invalid too.
148  if (auto *DD = dyn_cast<DecompositionDecl>(this)) {
149  for (auto *Binding : DD->bindings()) {
150  Binding->setInvalidDecl();
151  }
152  }
153 }
154 
155 const char *DeclContext::getDeclKindName() const {
156  switch (getDeclKind()) {
157 #define DECL(DERIVED, BASE) case Decl::DERIVED: return #DERIVED;
158 #define ABSTRACT_DECL(DECL)
159 #include "clang/AST/DeclNodes.inc"
160  }
161  llvm_unreachable("Declaration context not in DeclNodes.inc!");
162 }
163 
164 bool Decl::StatisticsEnabled = false;
166  StatisticsEnabled = true;
167 }
168 
170  llvm::errs() << "\n*** Decl Stats:\n";
171 
172  int totalDecls = 0;
173 #define DECL(DERIVED, BASE) totalDecls += n##DERIVED##s;
174 #define ABSTRACT_DECL(DECL)
175 #include "clang/AST/DeclNodes.inc"
176  llvm::errs() << " " << totalDecls << " decls total.\n";
177 
178  int totalBytes = 0;
179 #define DECL(DERIVED, BASE) \
180  if (n##DERIVED##s > 0) { \
181  totalBytes += (int)(n##DERIVED##s * sizeof(DERIVED##Decl)); \
182  llvm::errs() << " " << n##DERIVED##s << " " #DERIVED " decls, " \
183  << sizeof(DERIVED##Decl) << " each (" \
184  << n##DERIVED##s * sizeof(DERIVED##Decl) \
185  << " bytes)\n"; \
186  }
187 #define ABSTRACT_DECL(DECL)
188 #include "clang/AST/DeclNodes.inc"
189 
190  llvm::errs() << "Total bytes = " << totalBytes << "\n";
191 }
192 
193 void Decl::add(Kind k) {
194  switch (k) {
195 #define DECL(DERIVED, BASE) case DERIVED: ++n##DERIVED##s; break;
196 #define ABSTRACT_DECL(DECL)
197 #include "clang/AST/DeclNodes.inc"
198  }
199 }
200 
202  if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(this))
203  return TTP->isParameterPack();
204  if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(this))
205  return NTTP->isParameterPack();
206  if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(this))
207  return TTP->isParameterPack();
208  return false;
209 }
210 
211 bool Decl::isParameterPack() const {
212  if (const auto *Parm = dyn_cast<ParmVarDecl>(this))
213  return Parm->isParameterPack();
214 
215  return isTemplateParameterPack();
216 }
217 
219  if (auto *FD = dyn_cast<FunctionDecl>(this))
220  return FD;
221  if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(this))
222  return FTD->getTemplatedDecl();
223  return nullptr;
224 }
225 
226 bool Decl::isTemplateDecl() const {
227  return isa<TemplateDecl>(this);
228 }
229 
231  if (auto *FD = dyn_cast<FunctionDecl>(this))
232  return FD->getDescribedFunctionTemplate();
233  else if (auto *RD = dyn_cast<CXXRecordDecl>(this))
234  return RD->getDescribedClassTemplate();
235  else if (auto *VD = dyn_cast<VarDecl>(this))
236  return VD->getDescribedVarTemplate();
237  else if (auto *AD = dyn_cast<TypeAliasDecl>(this))
238  return AD->getDescribedAliasTemplate();
239 
240  return nullptr;
241 }
242 
243 bool Decl::isTemplated() const {
244  // A declaration is dependent if it is a template or a template pattern, or
245  // is within (lexcially for a friend, semantically otherwise) a dependent
246  // context.
247  // FIXME: Should local extern declarations be treated like friends?
248  if (auto *AsDC = dyn_cast<DeclContext>(this))
249  return AsDC->isDependentContext();
251  return DC->isDependentContext() || isTemplateDecl() || getDescribedTemplate();
252 }
253 
255  for (const DeclContext *DC = getDeclContext();
256  DC && !DC->isTranslationUnit() && !DC->isNamespace();
257  DC = DC->getParent())
258  if (DC->isFunctionOrMethod())
259  return DC;
260 
261  return nullptr;
262 }
263 
264 //===----------------------------------------------------------------------===//
265 // PrettyStackTraceDecl Implementation
266 //===----------------------------------------------------------------------===//
267 
268 void PrettyStackTraceDecl::print(raw_ostream &OS) const {
269  SourceLocation TheLoc = Loc;
270  if (TheLoc.isInvalid() && TheDecl)
271  TheLoc = TheDecl->getLocation();
272 
273  if (TheLoc.isValid()) {
274  TheLoc.print(OS, SM);
275  OS << ": ";
276  }
277 
278  OS << Message;
279 
280  if (const auto *DN = dyn_cast_or_null<NamedDecl>(TheDecl)) {
281  OS << " '";
282  DN->printQualifiedName(OS);
283  OS << '\'';
284  }
285  OS << '\n';
286 }
287 
288 //===----------------------------------------------------------------------===//
289 // Decl Implementation
290 //===----------------------------------------------------------------------===//
291 
292 // Out-of-line virtual method providing a home for Decl.
293 Decl::~Decl() = default;
294 
296  DeclCtx = DC;
297 }
298 
300  if (DC == getLexicalDeclContext())
301  return;
302 
303  if (isInSemaDC()) {
304  setDeclContextsImpl(getDeclContext(), DC, getASTContext());
305  } else {
306  getMultipleDC()->LexicalDC = DC;
307  }
308 
309  // FIXME: We shouldn't be changing the lexical context of declarations
310  // imported from AST files.
311  if (!isFromASTFile()) {
312  setModuleOwnershipKind(getModuleOwnershipKindForChildOf(DC));
313  if (hasOwningModule())
314  setLocalOwningModule(cast<Decl>(DC)->getOwningModule());
315  }
316 
317  assert(
319  getOwningModule()) &&
320  "hidden declaration has no owning module");
321 }
322 
323 void Decl::setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
324  ASTContext &Ctx) {
325  if (SemaDC == LexicalDC) {
326  DeclCtx = SemaDC;
327  } else {
328  auto *MDC = new (Ctx) Decl::MultipleDC();
329  MDC->SemanticDC = SemaDC;
330  MDC->LexicalDC = LexicalDC;
331  DeclCtx = MDC;
332  }
333 }
334 
336  const DeclContext *LDC = getLexicalDeclContext();
337  while (true) {
338  if (LDC->isFunctionOrMethod())
339  return true;
340  if (!isa<TagDecl>(LDC))
341  return false;
342  LDC = LDC->getLexicalParent();
343  }
344  return false;
345 }
346 
348  for (const DeclContext *DC = getDeclContext(); DC; DC = DC->getParent()) {
349  if (const auto *ND = dyn_cast<NamespaceDecl>(DC))
350  if (ND->isAnonymousNamespace())
351  return true;
352  }
353 
354  return false;
355 }
356 
358  return getDeclContext()->isStdNamespace();
359 }
360 
362  if (auto *TUD = dyn_cast<TranslationUnitDecl>(this))
363  return TUD;
364 
365  DeclContext *DC = getDeclContext();
366  assert(DC && "This decl is not contained in a translation unit!");
367 
368  while (!DC->isTranslationUnit()) {
369  DC = DC->getParent();
370  assert(DC && "This decl is not contained in a translation unit!");
371  }
372 
373  return cast<TranslationUnitDecl>(DC);
374 }
375 
378 }
379 
382 }
383 
384 unsigned Decl::getMaxAlignment() const {
385  if (!hasAttrs())
386  return 0;
387 
388  unsigned Align = 0;
389  const AttrVec &V = getAttrs();
390  ASTContext &Ctx = getASTContext();
391  specific_attr_iterator<AlignedAttr> I(V.begin()), E(V.end());
392  for (; I != E; ++I)
393  Align = std::max(Align, I->getAlignment(Ctx));
394  return Align;
395 }
396 
397 bool Decl::isUsed(bool CheckUsedAttr) const {
398  const Decl *CanonD = getCanonicalDecl();
399  if (CanonD->Used)
400  return true;
401 
402  // Check for used attribute.
403  // Ask the most recent decl, since attributes accumulate in the redecl chain.
404  if (CheckUsedAttr && getMostRecentDecl()->hasAttr<UsedAttr>())
405  return true;
406 
407  // The information may have not been deserialized yet. Force deserialization
408  // to complete the needed information.
409  return getMostRecentDecl()->getCanonicalDecl()->Used;
410 }
411 
413  if (isUsed(false))
414  return;
415 
416  if (C.getASTMutationListener())
418 
419  setIsUsed();
420 }
421 
422 bool Decl::isReferenced() const {
423  if (Referenced)
424  return true;
425 
426  // Check redeclarations.
427  for (const auto *I : redecls())
428  if (I->Referenced)
429  return true;
430 
431  return false;
432 }
433 
434 bool Decl::isExported() const {
435  if (isModulePrivate())
436  return false;
437  // Namespaces are always exported.
438  if (isa<TranslationUnitDecl>(this) || isa<NamespaceDecl>(this))
439  return true;
440  // Otherwise, this is a strictly lexical check.
441  for (auto *DC = getLexicalDeclContext(); DC; DC = DC->getLexicalParent()) {
442  if (cast<Decl>(DC)->isModulePrivate())
443  return false;
444  if (isa<ExportDecl>(DC))
445  return true;
446  }
447  return false;
448 }
449 
450 ExternalSourceSymbolAttr *Decl::getExternalSourceSymbolAttr() const {
451  const Decl *Definition = nullptr;
452  if (auto *ID = dyn_cast<ObjCInterfaceDecl>(this)) {
453  Definition = ID->getDefinition();
454  } else if (auto *PD = dyn_cast<ObjCProtocolDecl>(this)) {
455  Definition = PD->getDefinition();
456  } else if (auto *TD = dyn_cast<TagDecl>(this)) {
457  Definition = TD->getDefinition();
458  }
459  if (!Definition)
460  Definition = this;
461 
462  if (auto *attr = Definition->getAttr<ExternalSourceSymbolAttr>())
463  return attr;
464  if (auto *dcd = dyn_cast<Decl>(getDeclContext())) {
465  return dcd->getAttr<ExternalSourceSymbolAttr>();
466  }
467 
468  return nullptr;
469 }
470 
471 bool Decl::hasDefiningAttr() const {
472  return hasAttr<AliasAttr>() || hasAttr<IFuncAttr>();
473 }
474 
475 const Attr *Decl::getDefiningAttr() const {
476  if (auto *AA = getAttr<AliasAttr>())
477  return AA;
478  if (auto *IFA = getAttr<IFuncAttr>())
479  return IFA;
480  return nullptr;
481 }
482 
483 static StringRef getRealizedPlatform(const AvailabilityAttr *A,
484  const ASTContext &Context) {
485  // Check if this is an App Extension "platform", and if so chop off
486  // the suffix for matching with the actual platform.
487  StringRef RealizedPlatform = A->getPlatform()->getName();
488  if (!Context.getLangOpts().AppExt)
489  return RealizedPlatform;
490  size_t suffix = RealizedPlatform.rfind("_app_extension");
491  if (suffix != StringRef::npos)
492  return RealizedPlatform.slice(0, suffix);
493  return RealizedPlatform;
494 }
495 
496 /// Determine the availability of the given declaration based on
497 /// the target platform.
498 ///
499 /// When it returns an availability result other than \c AR_Available,
500 /// if the \p Message parameter is non-NULL, it will be set to a
501 /// string describing why the entity is unavailable.
502 ///
503 /// FIXME: Make these strings localizable, since they end up in
504 /// diagnostics.
506  const AvailabilityAttr *A,
507  std::string *Message,
508  VersionTuple EnclosingVersion) {
509  if (EnclosingVersion.empty())
510  EnclosingVersion = Context.getTargetInfo().getPlatformMinVersion();
511 
512  if (EnclosingVersion.empty())
513  return AR_Available;
514 
515  StringRef ActualPlatform = A->getPlatform()->getName();
516  StringRef TargetPlatform = Context.getTargetInfo().getPlatformName();
517 
518  // Match the platform name.
519  if (getRealizedPlatform(A, Context) != TargetPlatform)
520  return AR_Available;
521 
522  StringRef PrettyPlatformName
523  = AvailabilityAttr::getPrettyPlatformName(ActualPlatform);
524 
525  if (PrettyPlatformName.empty())
526  PrettyPlatformName = ActualPlatform;
527 
528  std::string HintMessage;
529  if (!A->getMessage().empty()) {
530  HintMessage = " - ";
531  HintMessage += A->getMessage();
532  }
533 
534  // Make sure that this declaration has not been marked 'unavailable'.
535  if (A->getUnavailable()) {
536  if (Message) {
537  Message->clear();
538  llvm::raw_string_ostream Out(*Message);
539  Out << "not available on " << PrettyPlatformName
540  << HintMessage;
541  }
542 
543  return AR_Unavailable;
544  }
545 
546  // Make sure that this declaration has already been introduced.
547  if (!A->getIntroduced().empty() &&
548  EnclosingVersion < A->getIntroduced()) {
549  if (Message) {
550  Message->clear();
551  llvm::raw_string_ostream Out(*Message);
552  VersionTuple VTI(A->getIntroduced());
553  Out << "introduced in " << PrettyPlatformName << ' '
554  << VTI << HintMessage;
555  }
556 
557  return A->getStrict() ? AR_Unavailable : AR_NotYetIntroduced;
558  }
559 
560  // Make sure that this declaration hasn't been obsoleted.
561  if (!A->getObsoleted().empty() && EnclosingVersion >= A->getObsoleted()) {
562  if (Message) {
563  Message->clear();
564  llvm::raw_string_ostream Out(*Message);
565  VersionTuple VTO(A->getObsoleted());
566  Out << "obsoleted in " << PrettyPlatformName << ' '
567  << VTO << HintMessage;
568  }
569 
570  return AR_Unavailable;
571  }
572 
573  // Make sure that this declaration hasn't been deprecated.
574  if (!A->getDeprecated().empty() && EnclosingVersion >= A->getDeprecated()) {
575  if (Message) {
576  Message->clear();
577  llvm::raw_string_ostream Out(*Message);
578  VersionTuple VTD(A->getDeprecated());
579  Out << "first deprecated in " << PrettyPlatformName << ' '
580  << VTD << HintMessage;
581  }
582 
583  return AR_Deprecated;
584  }
585 
586  return AR_Available;
587 }
588 
590  VersionTuple EnclosingVersion,
591  StringRef *RealizedPlatform) const {
592  if (auto *FTD = dyn_cast<FunctionTemplateDecl>(this))
593  return FTD->getTemplatedDecl()->getAvailability(Message, EnclosingVersion,
594  RealizedPlatform);
595 
597  std::string ResultMessage;
598 
599  for (const auto *A : attrs()) {
600  if (const auto *Deprecated = dyn_cast<DeprecatedAttr>(A)) {
601  if (Result >= AR_Deprecated)
602  continue;
603 
604  if (Message)
605  ResultMessage = Deprecated->getMessage();
606 
607  Result = AR_Deprecated;
608  continue;
609  }
610 
611  if (const auto *Unavailable = dyn_cast<UnavailableAttr>(A)) {
612  if (Message)
613  *Message = Unavailable->getMessage();
614  return AR_Unavailable;
615  }
616 
617  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
619  Message, EnclosingVersion);
620 
621  if (AR == AR_Unavailable) {
622  if (RealizedPlatform)
623  *RealizedPlatform = Availability->getPlatform()->getName();
624  return AR_Unavailable;
625  }
626 
627  if (AR > Result) {
628  Result = AR;
629  if (Message)
630  ResultMessage.swap(*Message);
631  }
632  continue;
633  }
634  }
635 
636  if (Message)
637  Message->swap(ResultMessage);
638  return Result;
639 }
640 
641 VersionTuple Decl::getVersionIntroduced() const {
642  const ASTContext &Context = getASTContext();
643  StringRef TargetPlatform = Context.getTargetInfo().getPlatformName();
644  for (const auto *A : attrs()) {
645  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
646  if (getRealizedPlatform(Availability, Context) != TargetPlatform)
647  continue;
648  if (!Availability->getIntroduced().empty())
649  return Availability->getIntroduced();
650  }
651  }
652  return {};
653 }
654 
655 bool Decl::canBeWeakImported(bool &IsDefinition) const {
656  IsDefinition = false;
657 
658  // Variables, if they aren't definitions.
659  if (const auto *Var = dyn_cast<VarDecl>(this)) {
660  if (Var->isThisDeclarationADefinition()) {
661  IsDefinition = true;
662  return false;
663  }
664  return true;
665 
666  // Functions, if they aren't definitions.
667  } else if (const auto *FD = dyn_cast<FunctionDecl>(this)) {
668  if (FD->hasBody()) {
669  IsDefinition = true;
670  return false;
671  }
672  return true;
673 
674  // Objective-C classes, if this is the non-fragile runtime.
675  } else if (isa<ObjCInterfaceDecl>(this) &&
677  return true;
678 
679  // Nothing else.
680  } else {
681  return false;
682  }
683 }
684 
685 bool Decl::isWeakImported() const {
686  bool IsDefinition;
687  if (!canBeWeakImported(IsDefinition))
688  return false;
689 
690  for (const auto *A : attrs()) {
691  if (isa<WeakImportAttr>(A))
692  return true;
693 
694  if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) {
695  if (CheckAvailability(getASTContext(), Availability, nullptr,
696  VersionTuple()) == AR_NotYetIntroduced)
697  return true;
698  }
699  }
700 
701  return false;
702 }
703 
705  switch (DeclKind) {
706  case Function:
707  case CXXDeductionGuide:
708  case CXXMethod:
709  case CXXConstructor:
710  case ConstructorUsingShadow:
711  case CXXDestructor:
712  case CXXConversion:
713  case EnumConstant:
714  case Var:
715  case ImplicitParam:
716  case ParmVar:
717  case ObjCMethod:
718  case ObjCProperty:
719  case MSProperty:
720  return IDNS_Ordinary;
721  case Label:
722  return IDNS_Label;
723  case IndirectField:
724  return IDNS_Ordinary | IDNS_Member;
725 
726  case Binding:
727  case NonTypeTemplateParm:
728  case VarTemplate:
729  // These (C++-only) declarations are found by redeclaration lookup for
730  // tag types, so we include them in the tag namespace.
731  return IDNS_Ordinary | IDNS_Tag;
732 
733  case ObjCCompatibleAlias:
734  case ObjCInterface:
735  return IDNS_Ordinary | IDNS_Type;
736 
737  case Typedef:
738  case TypeAlias:
739  case TemplateTypeParm:
740  case ObjCTypeParam:
741  return IDNS_Ordinary | IDNS_Type;
742 
743  case UnresolvedUsingTypename:
745 
746  case UsingShadow:
747  return 0; // we'll actually overwrite this later
748 
749  case UnresolvedUsingValue:
750  return IDNS_Ordinary | IDNS_Using;
751 
752  case Using:
753  case UsingPack:
754  return IDNS_Using;
755 
756  case ObjCProtocol:
757  return IDNS_ObjCProtocol;
758 
759  case Field:
760  case ObjCAtDefsField:
761  case ObjCIvar:
762  return IDNS_Member;
763 
764  case Record:
765  case CXXRecord:
766  case Enum:
767  return IDNS_Tag | IDNS_Type;
768 
769  case Namespace:
770  case NamespaceAlias:
771  return IDNS_Namespace;
772 
773  case FunctionTemplate:
774  return IDNS_Ordinary;
775 
776  case ClassTemplate:
777  case TemplateTemplateParm:
778  case TypeAliasTemplate:
779  return IDNS_Ordinary | IDNS_Tag | IDNS_Type;
780 
781  case OMPDeclareReduction:
782  return IDNS_OMPReduction;
783 
784  // Never have names.
785  case Friend:
786  case FriendTemplate:
787  case AccessSpec:
788  case LinkageSpec:
789  case Export:
790  case FileScopeAsm:
791  case StaticAssert:
792  case ObjCPropertyImpl:
793  case PragmaComment:
794  case PragmaDetectMismatch:
795  case Block:
796  case Captured:
797  case TranslationUnit:
798  case ExternCContext:
799  case Decomposition:
800 
801  case UsingDirective:
802  case BuiltinTemplate:
803  case ClassTemplateSpecialization:
804  case ClassTemplatePartialSpecialization:
805  case ClassScopeFunctionSpecialization:
806  case VarTemplateSpecialization:
807  case VarTemplatePartialSpecialization:
808  case ObjCImplementation:
809  case ObjCCategory:
810  case ObjCCategoryImpl:
811  case Import:
812  case OMPThreadPrivate:
813  case OMPRequires:
814  case OMPCapturedExpr:
815  case Empty:
816  // Never looked up by name.
817  return 0;
818  }
819 
820  llvm_unreachable("Invalid DeclKind!");
821 }
822 
823 void Decl::setAttrsImpl(const AttrVec &attrs, ASTContext &Ctx) {
824  assert(!HasAttrs && "Decl already contains attrs.");
825 
826  AttrVec &AttrBlank = Ctx.getDeclAttrs(this);
827  assert(AttrBlank.empty() && "HasAttrs was wrong?");
828 
829  AttrBlank = attrs;
830  HasAttrs = true;
831 }
832 
834  if (!HasAttrs) return;
835 
836  HasAttrs = false;
838 }
839 
840 void Decl::addAttr(Attr *A) {
841  if (!hasAttrs()) {
842  setAttrs(AttrVec(1, A));
843  return;
844  }
845 
846  AttrVec &Attrs = getAttrs();
847  if (!A->isInherited()) {
848  Attrs.push_back(A);
849  return;
850  }
851 
852  // Attribute inheritance is processed after attribute parsing. To keep the
853  // order as in the source code, add inherited attributes before non-inherited
854  // ones.
855  auto I = Attrs.begin(), E = Attrs.end();
856  for (; I != E; ++I) {
857  if (!(*I)->isInherited())
858  break;
859  }
860  Attrs.insert(I, A);
861 }
862 
863 const AttrVec &Decl::getAttrs() const {
864  assert(HasAttrs && "No attrs to get!");
865  return getASTContext().getDeclAttrs(this);
866 }
867 
869  Decl::Kind DK = D->getDeclKind();
870  switch(DK) {
871 #define DECL(NAME, BASE)
872 #define DECL_CONTEXT(NAME) \
873  case Decl::NAME: \
874  return static_cast<NAME##Decl *>(const_cast<DeclContext *>(D));
875 #define DECL_CONTEXT_BASE(NAME)
876 #include "clang/AST/DeclNodes.inc"
877  default:
878 #define DECL(NAME, BASE)
879 #define DECL_CONTEXT_BASE(NAME) \
880  if (DK >= first##NAME && DK <= last##NAME) \
881  return static_cast<NAME##Decl *>(const_cast<DeclContext *>(D));
882 #include "clang/AST/DeclNodes.inc"
883  llvm_unreachable("a decl that inherits DeclContext isn't handled");
884  }
885 }
886 
888  Decl::Kind DK = D->getKind();
889  switch(DK) {
890 #define DECL(NAME, BASE)
891 #define DECL_CONTEXT(NAME) \
892  case Decl::NAME: \
893  return static_cast<NAME##Decl *>(const_cast<Decl *>(D));
894 #define DECL_CONTEXT_BASE(NAME)
895 #include "clang/AST/DeclNodes.inc"
896  default:
897 #define DECL(NAME, BASE)
898 #define DECL_CONTEXT_BASE(NAME) \
899  if (DK >= first##NAME && DK <= last##NAME) \
900  return static_cast<NAME##Decl *>(const_cast<Decl *>(D));
901 #include "clang/AST/DeclNodes.inc"
902  llvm_unreachable("a decl that inherits DeclContext isn't handled");
903  }
904 }
905 
907  // Special handling of FunctionDecl to avoid de-serializing the body from PCH.
908  // FunctionDecl stores EndRangeLoc for this purpose.
909  if (const auto *FD = dyn_cast<FunctionDecl>(this)) {
910  const FunctionDecl *Definition;
911  if (FD->hasBody(Definition))
912  return Definition->getSourceRange().getEnd();
913  return {};
914  }
915 
916  if (Stmt *Body = getBody())
917  return Body->getSourceRange().getEnd();
918 
919  return {};
920 }
921 
922 bool Decl::AccessDeclContextSanity() const {
923 #ifndef NDEBUG
924  // Suppress this check if any of the following hold:
925  // 1. this is the translation unit (and thus has no parent)
926  // 2. this is a template parameter (and thus doesn't belong to its context)
927  // 3. this is a non-type template parameter
928  // 4. the context is not a record
929  // 5. it's invalid
930  // 6. it's a C++0x static_assert.
931  // 7. it's a block literal declaration
932  if (isa<TranslationUnitDecl>(this) ||
933  isa<TemplateTypeParmDecl>(this) ||
934  isa<NonTypeTemplateParmDecl>(this) ||
935  !isa<CXXRecordDecl>(getDeclContext()) ||
936  isInvalidDecl() ||
937  isa<StaticAssertDecl>(this) ||
938  isa<BlockDecl>(this) ||
939  // FIXME: a ParmVarDecl can have ClassTemplateSpecialization
940  // as DeclContext (?).
941  isa<ParmVarDecl>(this) ||
942  // FIXME: a ClassTemplateSpecialization or CXXRecordDecl can have
943  // AS_none as access specifier.
944  isa<CXXRecordDecl>(this) ||
945  isa<ClassScopeFunctionSpecializationDecl>(this))
946  return true;
947 
948  assert(Access != AS_none &&
949  "Access specifier is AS_none inside a record decl");
950 #endif
951  return true;
952 }
953 
954 static Decl::Kind getKind(const Decl *D) { return D->getKind(); }
955 static Decl::Kind getKind(const DeclContext *DC) { return DC->getDeclKind(); }
956 
957 int64_t Decl::getID() const {
958  return getASTContext().getAllocator().identifyKnownAlignedObject<Decl>(this);
959 }
960 
961 const FunctionType *Decl::getFunctionType(bool BlocksToo) const {
962  QualType Ty;
963  if (const auto *D = dyn_cast<ValueDecl>(this))
964  Ty = D->getType();
965  else if (const auto *D = dyn_cast<TypedefNameDecl>(this))
966  Ty = D->getUnderlyingType();
967  else
968  return nullptr;
969 
970  if (Ty->isFunctionPointerType())
971  Ty = Ty->getAs<PointerType>()->getPointeeType();
972  else if (BlocksToo && Ty->isBlockPointerType())
973  Ty = Ty->getAs<BlockPointerType>()->getPointeeType();
974 
975  return Ty->getAs<FunctionType>();
976 }
977 
978 /// Starting at a given context (a Decl or DeclContext), look for a
979 /// code context that is not a closure (a lambda, block, etc.).
980 template <class T> static Decl *getNonClosureContext(T *D) {
981  if (getKind(D) == Decl::CXXMethod) {
982  auto *MD = cast<CXXMethodDecl>(D);
983  if (MD->getOverloadedOperator() == OO_Call &&
984  MD->getParent()->isLambda())
985  return getNonClosureContext(MD->getParent()->getParent());
986  return MD;
987  } else if (auto *FD = dyn_cast<FunctionDecl>(D))
988  return FD;
989  else if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
990  return MD;
991  else if (auto *BD = dyn_cast<BlockDecl>(D))
992  return getNonClosureContext(BD->getParent());
993  else if (auto *CD = dyn_cast<CapturedDecl>(D))
994  return getNonClosureContext(CD->getParent());
995  else
996  return nullptr;
997 }
998 
1001 }
1002 
1005 }
1006 
1007 //===----------------------------------------------------------------------===//
1008 // DeclContext Implementation
1009 //===----------------------------------------------------------------------===//
1010 
1012  DeclContextBits.DeclKind = K;
1013  setHasExternalLexicalStorage(false);
1014  setHasExternalVisibleStorage(false);
1015  setNeedToReconcileExternalVisibleStorage(false);
1016  setHasLazyLocalLexicalLookups(false);
1017  setHasLazyExternalLexicalLookups(false);
1018  setUseQualifiedLookup(false);
1019 }
1020 
1021 bool DeclContext::classof(const Decl *D) {
1022  switch (D->getKind()) {
1023 #define DECL(NAME, BASE)
1024 #define DECL_CONTEXT(NAME) case Decl::NAME:
1025 #define DECL_CONTEXT_BASE(NAME)
1026 #include "clang/AST/DeclNodes.inc"
1027  return true;
1028  default:
1029 #define DECL(NAME, BASE)
1030 #define DECL_CONTEXT_BASE(NAME) \
1031  if (D->getKind() >= Decl::first##NAME && \
1032  D->getKind() <= Decl::last##NAME) \
1033  return true;
1034 #include "clang/AST/DeclNodes.inc"
1035  return false;
1036  }
1037 }
1038 
1039 DeclContext::~DeclContext() = default;
1040 
1041 /// Find the parent context of this context that will be
1042 /// used for unqualified name lookup.
1043 ///
1044 /// Generally, the parent lookup context is the semantic context. However, for
1045 /// a friend function the parent lookup context is the lexical context, which
1046 /// is the class in which the friend is declared.
1048  // FIXME: Find a better way to identify friends.
1049  if (isa<FunctionDecl>(this))
1050  if (getParent()->getRedeclContext()->isFileContext() &&
1051  getLexicalParent()->getRedeclContext()->isRecord())
1052  return getLexicalParent();
1053 
1054  return getParent();
1055 }
1056 
1058  return isNamespace() &&
1059  cast<NamespaceDecl>(this)->isInline();
1060 }
1061 
1063  if (!isNamespace())
1064  return false;
1065 
1066  const auto *ND = cast<NamespaceDecl>(this);
1067  if (ND->isInline()) {
1068  return ND->getParent()->isStdNamespace();
1069  }
1070 
1071  if (!getParent()->getRedeclContext()->isTranslationUnit())
1072  return false;
1073 
1074  const IdentifierInfo *II = ND->getIdentifier();
1075  return II && II->isStr("std");
1076 }
1077 
1079  if (isFileContext())
1080  return false;
1081 
1082  if (isa<ClassTemplatePartialSpecializationDecl>(this))
1083  return true;
1084 
1085  if (const auto *Record = dyn_cast<CXXRecordDecl>(this)) {
1086  if (Record->getDescribedClassTemplate())
1087  return true;
1088 
1089  if (Record->isDependentLambda())
1090  return true;
1091  }
1092 
1093  if (const auto *Function = dyn_cast<FunctionDecl>(this)) {
1094  if (Function->getDescribedFunctionTemplate())
1095  return true;
1096 
1097  // Friend function declarations are dependent if their *lexical*
1098  // context is dependent.
1099  if (cast<Decl>(this)->getFriendObjectKind())
1100  return getLexicalParent()->isDependentContext();
1101  }
1102 
1103  // FIXME: A variable template is a dependent context, but is not a
1104  // DeclContext. A context within it (such as a lambda-expression)
1105  // should be considered dependent.
1106 
1107  return getParent() && getParent()->isDependentContext();
1108 }
1109 
1111  if (getDeclKind() == Decl::Enum)
1112  return !cast<EnumDecl>(this)->isScoped();
1113  else if (getDeclKind() == Decl::LinkageSpec || getDeclKind() == Decl::Export)
1114  return true;
1115 
1116  return false;
1117 }
1118 
1119 static bool isLinkageSpecContext(const DeclContext *DC,
1121  while (DC->getDeclKind() != Decl::TranslationUnit) {
1122  if (DC->getDeclKind() == Decl::LinkageSpec)
1123  return cast<LinkageSpecDecl>(DC)->getLanguage() == ID;
1124  DC = DC->getLexicalParent();
1125  }
1126  return false;
1127 }
1128 
1131 }
1132 
1134  const DeclContext *DC = this;
1135  while (DC->getDeclKind() != Decl::TranslationUnit) {
1136  if (DC->getDeclKind() == Decl::LinkageSpec &&
1137  cast<LinkageSpecDecl>(DC)->getLanguage() == LinkageSpecDecl::lang_c)
1138  return cast<LinkageSpecDecl>(DC);
1139  DC = DC->getLexicalParent();
1140  }
1141  return nullptr;
1142 }
1143 
1146 }
1147 
1148 bool DeclContext::Encloses(const DeclContext *DC) const {
1149  if (getPrimaryContext() != this)
1150  return getPrimaryContext()->Encloses(DC);
1151 
1152  for (; DC; DC = DC->getParent())
1153  if (DC->getPrimaryContext() == this)
1154  return true;
1155  return false;
1156 }
1157 
1159  switch (getDeclKind()) {
1160  case Decl::TranslationUnit:
1161  case Decl::ExternCContext:
1162  case Decl::LinkageSpec:
1163  case Decl::Export:
1164  case Decl::Block:
1165  case Decl::Captured:
1166  case Decl::OMPDeclareReduction:
1167  // There is only one DeclContext for these entities.
1168  return this;
1169 
1170  case Decl::Namespace:
1171  // The original namespace is our primary context.
1172  return static_cast<NamespaceDecl *>(this)->getOriginalNamespace();
1173 
1174  case Decl::ObjCMethod:
1175  return this;
1176 
1177  case Decl::ObjCInterface:
1178  if (auto *Def = cast<ObjCInterfaceDecl>(this)->getDefinition())
1179  return Def;
1180  return this;
1181 
1182  case Decl::ObjCProtocol:
1183  if (auto *Def = cast<ObjCProtocolDecl>(this)->getDefinition())
1184  return Def;
1185  return this;
1186 
1187  case Decl::ObjCCategory:
1188  return this;
1189 
1190  case Decl::ObjCImplementation:
1191  case Decl::ObjCCategoryImpl:
1192  return this;
1193 
1194  default:
1195  if (getDeclKind() >= Decl::firstTag && getDeclKind() <= Decl::lastTag) {
1196  // If this is a tag type that has a definition or is currently
1197  // being defined, that definition is our primary context.
1198  auto *Tag = cast<TagDecl>(this);
1199 
1200  if (TagDecl *Def = Tag->getDefinition())
1201  return Def;
1202 
1203  if (const auto *TagTy = dyn_cast<TagType>(Tag->getTypeForDecl())) {
1204  // Note, TagType::getDecl returns the (partial) definition one exists.
1205  TagDecl *PossiblePartialDef = TagTy->getDecl();
1206  if (PossiblePartialDef->isBeingDefined())
1207  return PossiblePartialDef;
1208  } else {
1209  assert(isa<InjectedClassNameType>(Tag->getTypeForDecl()));
1210  }
1211 
1212  return Tag;
1213  }
1214 
1215  assert(getDeclKind() >= Decl::firstFunction &&
1216  getDeclKind() <= Decl::lastFunction &&
1217  "Unknown DeclContext kind");
1218  return this;
1219  }
1220 }
1221 
1222 void
1224  Contexts.clear();
1225 
1226  if (getDeclKind() != Decl::Namespace) {
1227  Contexts.push_back(this);
1228  return;
1229  }
1230 
1231  auto *Self = static_cast<NamespaceDecl *>(this);
1232  for (NamespaceDecl *N = Self->getMostRecentDecl(); N;
1233  N = N->getPreviousDecl())
1234  Contexts.push_back(N);
1235 
1236  std::reverse(Contexts.begin(), Contexts.end());
1237 }
1238 
1239 std::pair<Decl *, Decl *>
1241  bool FieldsAlreadyLoaded) {
1242  // Build up a chain of declarations via the Decl::NextInContextAndBits field.
1243  Decl *FirstNewDecl = nullptr;
1244  Decl *PrevDecl = nullptr;
1245  for (auto *D : Decls) {
1246  if (FieldsAlreadyLoaded && isa<FieldDecl>(D))
1247  continue;
1248 
1249  if (PrevDecl)
1250  PrevDecl->NextInContextAndBits.setPointer(D);
1251  else
1252  FirstNewDecl = D;
1253 
1254  PrevDecl = D;
1255  }
1256 
1257  return std::make_pair(FirstNewDecl, PrevDecl);
1258 }
1259 
1260 /// We have just acquired external visible storage, and we already have
1261 /// built a lookup map. For every name in the map, pull in the new names from
1262 /// the external storage.
1263 void DeclContext::reconcileExternalVisibleStorage() const {
1264  assert(hasNeedToReconcileExternalVisibleStorage() && LookupPtr);
1265  setNeedToReconcileExternalVisibleStorage(false);
1266 
1267  for (auto &Lookup : *LookupPtr)
1268  Lookup.second.setHasExternalDecls();
1269 }
1270 
1271 /// Load the declarations within this lexical storage from an
1272 /// external source.
1273 /// \return \c true if any declarations were added.
1274 bool
1275 DeclContext::LoadLexicalDeclsFromExternalStorage() const {
1276  ExternalASTSource *Source = getParentASTContext().getExternalSource();
1277  assert(hasExternalLexicalStorage() && Source && "No external storage?");
1278 
1279  // Notify that we have a DeclContext that is initializing.
1280  ExternalASTSource::Deserializing ADeclContext(Source);
1281 
1282  // Load the external declarations, if any.
1283  SmallVector<Decl*, 64> Decls;
1284  setHasExternalLexicalStorage(false);
1285  Source->FindExternalLexicalDecls(this, Decls);
1286 
1287  if (Decls.empty())
1288  return false;
1289 
1290  // We may have already loaded just the fields of this record, in which case
1291  // we need to ignore them.
1292  bool FieldsAlreadyLoaded = false;
1293  if (const auto *RD = dyn_cast<RecordDecl>(this))
1294  FieldsAlreadyLoaded = RD->hasLoadedFieldsFromExternalStorage();
1295 
1296  // Splice the newly-read declarations into the beginning of the list
1297  // of declarations.
1298  Decl *ExternalFirst, *ExternalLast;
1299  std::tie(ExternalFirst, ExternalLast) =
1300  BuildDeclChain(Decls, FieldsAlreadyLoaded);
1301  ExternalLast->NextInContextAndBits.setPointer(FirstDecl);
1302  FirstDecl = ExternalFirst;
1303  if (!LastDecl)
1304  LastDecl = ExternalLast;
1305  return true;
1306 }
1307 
1310  DeclarationName Name) {
1311  ASTContext &Context = DC->getParentASTContext();
1312  StoredDeclsMap *Map;
1313  if (!(Map = DC->LookupPtr))
1314  Map = DC->CreateStoredDeclsMap(Context);
1315  if (DC->hasNeedToReconcileExternalVisibleStorage())
1316  DC->reconcileExternalVisibleStorage();
1317 
1318  (*Map)[Name].removeExternalDecls();
1319 
1320  return DeclContext::lookup_result();
1321 }
1322 
1325  DeclarationName Name,
1326  ArrayRef<NamedDecl*> Decls) {
1327  ASTContext &Context = DC->getParentASTContext();
1328  StoredDeclsMap *Map;
1329  if (!(Map = DC->LookupPtr))
1330  Map = DC->CreateStoredDeclsMap(Context);
1331  if (DC->hasNeedToReconcileExternalVisibleStorage())
1332  DC->reconcileExternalVisibleStorage();
1333 
1334  StoredDeclsList &List = (*Map)[Name];
1335 
1336  // Clear out any old external visible declarations, to avoid quadratic
1337  // performance in the redeclaration checks below.
1338  List.removeExternalDecls();
1339 
1340  if (!List.isNull()) {
1341  // We have both existing declarations and new declarations for this name.
1342  // Some of the declarations may simply replace existing ones. Handle those
1343  // first.
1345  for (unsigned I = 0, N = Decls.size(); I != N; ++I)
1346  if (List.HandleRedeclaration(Decls[I], /*IsKnownNewer*/false))
1347  Skip.push_back(I);
1348  Skip.push_back(Decls.size());
1349 
1350  // Add in any new declarations.
1351  unsigned SkipPos = 0;
1352  for (unsigned I = 0, N = Decls.size(); I != N; ++I) {
1353  if (I == Skip[SkipPos])
1354  ++SkipPos;
1355  else
1356  List.AddSubsequentDecl(Decls[I]);
1357  }
1358  } else {
1359  // Convert the array to a StoredDeclsList.
1360  for (auto *D : Decls) {
1361  if (List.isNull())
1362  List.setOnlyValue(D);
1363  else
1364  List.AddSubsequentDecl(D);
1365  }
1366  }
1367 
1368  return List.getLookupResult();
1369 }
1370 
1372  if (hasExternalLexicalStorage())
1373  LoadLexicalDeclsFromExternalStorage();
1374  return decl_iterator(FirstDecl);
1375 }
1376 
1378  if (hasExternalLexicalStorage())
1379  LoadLexicalDeclsFromExternalStorage();
1380 
1381  return !FirstDecl;
1382 }
1383 
1385  return (D->getLexicalDeclContext() == this &&
1386  (D->NextInContextAndBits.getPointer() || D == LastDecl));
1387 }
1388 
1390  if (hasExternalLexicalStorage())
1391  LoadLexicalDeclsFromExternalStorage();
1392  return containsDecl(D);
1393 }
1394 
1395 /// shouldBeHidden - Determine whether a declaration which was declared
1396 /// within its semantic context should be invisible to qualified name lookup.
1397 static bool shouldBeHidden(NamedDecl *D) {
1398  // Skip unnamed declarations.
1399  if (!D->getDeclName())
1400  return true;
1401 
1402  // Skip entities that can't be found by name lookup into a particular
1403  // context.
1404  if ((D->getIdentifierNamespace() == 0 && !isa<UsingDirectiveDecl>(D)) ||
1405  D->isTemplateParameter())
1406  return true;
1407 
1408  // Skip template specializations.
1409  // FIXME: This feels like a hack. Should DeclarationName support
1410  // template-ids, or is there a better way to keep specializations
1411  // from being visible?
1412  if (isa<ClassTemplateSpecializationDecl>(D))
1413  return true;
1414  if (auto *FD = dyn_cast<FunctionDecl>(D))
1415  if (FD->isFunctionTemplateSpecialization())
1416  return true;
1417 
1418  return false;
1419 }
1420 
1422  assert(D->getLexicalDeclContext() == this &&
1423  "decl being removed from non-lexical context");
1424  assert((D->NextInContextAndBits.getPointer() || D == LastDecl) &&
1425  "decl is not in decls list");
1426 
1427  // Remove D from the decl chain. This is O(n) but hopefully rare.
1428  if (D == FirstDecl) {
1429  if (D == LastDecl)
1430  FirstDecl = LastDecl = nullptr;
1431  else
1432  FirstDecl = D->NextInContextAndBits.getPointer();
1433  } else {
1434  for (Decl *I = FirstDecl; true; I = I->NextInContextAndBits.getPointer()) {
1435  assert(I && "decl not found in linked list");
1436  if (I->NextInContextAndBits.getPointer() == D) {
1437  I->NextInContextAndBits.setPointer(D->NextInContextAndBits.getPointer());
1438  if (D == LastDecl) LastDecl = I;
1439  break;
1440  }
1441  }
1442  }
1443 
1444  // Mark that D is no longer in the decl chain.
1445  D->NextInContextAndBits.setPointer(nullptr);
1446 
1447  // Remove D from the lookup table if necessary.
1448  if (isa<NamedDecl>(D)) {
1449  auto *ND = cast<NamedDecl>(D);
1450 
1451  // Do not try to remove the declaration if that is invisible to qualified
1452  // lookup. E.g. template specializations are skipped.
1453  if (shouldBeHidden(ND))
1454  return;
1455 
1456  // Remove only decls that have a name
1457  if (!ND->getDeclName())
1458  return;
1459 
1460  auto *DC = D->getDeclContext();
1461  do {
1462  StoredDeclsMap *Map = DC->getPrimaryContext()->LookupPtr;
1463  if (Map) {
1464  StoredDeclsMap::iterator Pos = Map->find(ND->getDeclName());
1465  assert(Pos != Map->end() && "no lookup entry for decl");
1466  if (Pos->second.getAsVector() || Pos->second.getAsDecl() == ND)
1467  Pos->second.remove(ND);
1468  }
1469  } while (DC->isTransparentContext() && (DC = DC->getParent()));
1470  }
1471 }
1472 
1474  assert(D->getLexicalDeclContext() == this &&
1475  "Decl inserted into wrong lexical context");
1476  assert(!D->getNextDeclInContext() && D != LastDecl &&
1477  "Decl already inserted into a DeclContext");
1478 
1479  if (FirstDecl) {
1480  LastDecl->NextInContextAndBits.setPointer(D);
1481  LastDecl = D;
1482  } else {
1483  FirstDecl = LastDecl = D;
1484  }
1485 
1486  // Notify a C++ record declaration that we've added a member, so it can
1487  // update its class-specific state.
1488  if (auto *Record = dyn_cast<CXXRecordDecl>(this))
1489  Record->addedMember(D);
1490 
1491  // If this is a newly-created (not de-serialized) import declaration, wire
1492  // it in to the list of local import declarations.
1493  if (!D->isFromASTFile()) {
1494  if (auto *Import = dyn_cast<ImportDecl>(D))
1495  D->getASTContext().addedLocalImportDecl(Import);
1496  }
1497 }
1498 
1500  addHiddenDecl(D);
1501 
1502  if (auto *ND = dyn_cast<NamedDecl>(D))
1503  ND->getDeclContext()->getPrimaryContext()->
1504  makeDeclVisibleInContextWithFlags(ND, false, true);
1505 }
1506 
1508  addHiddenDecl(D);
1509 
1510  if (auto *ND = dyn_cast<NamedDecl>(D))
1511  ND->getDeclContext()->getPrimaryContext()->
1512  makeDeclVisibleInContextWithFlags(ND, true, true);
1513 }
1514 
1515 /// buildLookup - Build the lookup data structure with all of the
1516 /// declarations in this DeclContext (and any other contexts linked
1517 /// to it or transparent contexts nested within it) and return it.
1518 ///
1519 /// Note that the produced map may miss out declarations from an
1520 /// external source. If it does, those entries will be marked with
1521 /// the 'hasExternalDecls' flag.
1523  assert(this == getPrimaryContext() && "buildLookup called on non-primary DC");
1524 
1525  if (!hasLazyLocalLexicalLookups() &&
1526  !hasLazyExternalLexicalLookups())
1527  return LookupPtr;
1528 
1530  collectAllContexts(Contexts);
1531 
1532  if (hasLazyExternalLexicalLookups()) {
1533  setHasLazyExternalLexicalLookups(false);
1534  for (auto *DC : Contexts) {
1535  if (DC->hasExternalLexicalStorage()) {
1536  bool LoadedDecls = DC->LoadLexicalDeclsFromExternalStorage();
1537  setHasLazyLocalLexicalLookups(
1538  hasLazyLocalLexicalLookups() | LoadedDecls );
1539  }
1540  }
1541 
1542  if (!hasLazyLocalLexicalLookups())
1543  return LookupPtr;
1544  }
1545 
1546  for (auto *DC : Contexts)
1547  buildLookupImpl(DC, hasExternalVisibleStorage());
1548 
1549  // We no longer have any lazy decls.
1550  setHasLazyLocalLexicalLookups(false);
1551  return LookupPtr;
1552 }
1553 
1554 /// buildLookupImpl - Build part of the lookup data structure for the
1555 /// declarations contained within DCtx, which will either be this
1556 /// DeclContext, a DeclContext linked to it, or a transparent context
1557 /// nested within it.
1558 void DeclContext::buildLookupImpl(DeclContext *DCtx, bool Internal) {
1559  for (auto *D : DCtx->noload_decls()) {
1560  // Insert this declaration into the lookup structure, but only if
1561  // it's semantically within its decl context. Any other decls which
1562  // should be found in this context are added eagerly.
1563  //
1564  // If it's from an AST file, don't add it now. It'll get handled by
1565  // FindExternalVisibleDeclsByName if needed. Exception: if we're not
1566  // in C++, we do not track external visible decls for the TU, so in
1567  // that case we need to collect them all here.
1568  if (auto *ND = dyn_cast<NamedDecl>(D))
1569  if (ND->getDeclContext() == DCtx && !shouldBeHidden(ND) &&
1570  (!ND->isFromASTFile() ||
1571  (isTranslationUnit() &&
1572  !getParentASTContext().getLangOpts().CPlusPlus)))
1573  makeDeclVisibleInContextImpl(ND, Internal);
1574 
1575  // If this declaration is itself a transparent declaration context
1576  // or inline namespace, add the members of this declaration of that
1577  // context (recursively).
1578  if (auto *InnerCtx = dyn_cast<DeclContext>(D))
1579  if (InnerCtx->isTransparentContext() || InnerCtx->isInlineNamespace())
1580  buildLookupImpl(InnerCtx, Internal);
1581  }
1582 }
1583 
1584 NamedDecl *const DeclContextLookupResult::SingleElementDummyList = nullptr;
1585 
1588  assert(getDeclKind() != Decl::LinkageSpec &&
1589  getDeclKind() != Decl::Export &&
1590  "should not perform lookups into transparent contexts");
1591 
1592  const DeclContext *PrimaryContext = getPrimaryContext();
1593  if (PrimaryContext != this)
1594  return PrimaryContext->lookup(Name);
1595 
1596  // If we have an external source, ensure that any later redeclarations of this
1597  // context have been loaded, since they may add names to the result of this
1598  // lookup (or add external visible storage).
1599  ExternalASTSource *Source = getParentASTContext().getExternalSource();
1600  if (Source)
1601  (void)cast<Decl>(this)->getMostRecentDecl();
1602 
1603  if (hasExternalVisibleStorage()) {
1604  assert(Source && "external visible storage but no external source?");
1605 
1606  if (hasNeedToReconcileExternalVisibleStorage())
1607  reconcileExternalVisibleStorage();
1608 
1609  StoredDeclsMap *Map = LookupPtr;
1610 
1611  if (hasLazyLocalLexicalLookups() ||
1612  hasLazyExternalLexicalLookups())
1613  // FIXME: Make buildLookup const?
1614  Map = const_cast<DeclContext*>(this)->buildLookup();
1615 
1616  if (!Map)
1617  Map = CreateStoredDeclsMap(getParentASTContext());
1618 
1619  // If we have a lookup result with no external decls, we are done.
1620  std::pair<StoredDeclsMap::iterator, bool> R =
1621  Map->insert(std::make_pair(Name, StoredDeclsList()));
1622  if (!R.second && !R.first->second.hasExternalDecls())
1623  return R.first->second.getLookupResult();
1624 
1625  if (Source->FindExternalVisibleDeclsByName(this, Name) || !R.second) {
1626  if (StoredDeclsMap *Map = LookupPtr) {
1627  StoredDeclsMap::iterator I = Map->find(Name);
1628  if (I != Map->end())
1629  return I->second.getLookupResult();
1630  }
1631  }
1632 
1633  return {};
1634  }
1635 
1636  StoredDeclsMap *Map = LookupPtr;
1637  if (hasLazyLocalLexicalLookups() ||
1638  hasLazyExternalLexicalLookups())
1639  Map = const_cast<DeclContext*>(this)->buildLookup();
1640 
1641  if (!Map)
1642  return {};
1643 
1644  StoredDeclsMap::iterator I = Map->find(Name);
1645  if (I == Map->end())
1646  return {};
1647 
1648  return I->second.getLookupResult();
1649 }
1650 
1653  assert(getDeclKind() != Decl::LinkageSpec &&
1654  getDeclKind() != Decl::Export &&
1655  "should not perform lookups into transparent contexts");
1656 
1657  DeclContext *PrimaryContext = getPrimaryContext();
1658  if (PrimaryContext != this)
1659  return PrimaryContext->noload_lookup(Name);
1660 
1661  loadLazyLocalLexicalLookups();
1662  StoredDeclsMap *Map = LookupPtr;
1663  if (!Map)
1664  return {};
1665 
1666  StoredDeclsMap::iterator I = Map->find(Name);
1667  return I != Map->end() ? I->second.getLookupResult()
1668  : lookup_result();
1669 }
1670 
1671 // If we have any lazy lexical declarations not in our lookup map, add them
1672 // now. Don't import any external declarations, not even if we know we have
1673 // some missing from the external visible lookups.
1674 void DeclContext::loadLazyLocalLexicalLookups() {
1675  if (hasLazyLocalLexicalLookups()) {
1677  collectAllContexts(Contexts);
1678  for (auto *Context : Contexts)
1679  buildLookupImpl(Context, hasExternalVisibleStorage());
1680  setHasLazyLocalLexicalLookups(false);
1681  }
1682 }
1683 
1685  SmallVectorImpl<NamedDecl *> &Results) {
1686  Results.clear();
1687 
1688  // If there's no external storage, just perform a normal lookup and copy
1689  // the results.
1690  if (!hasExternalVisibleStorage() && !hasExternalLexicalStorage() && Name) {
1691  lookup_result LookupResults = lookup(Name);
1692  Results.insert(Results.end(), LookupResults.begin(), LookupResults.end());
1693  return;
1694  }
1695 
1696  // If we have a lookup table, check there first. Maybe we'll get lucky.
1697  // FIXME: Should we be checking these flags on the primary context?
1698  if (Name && !hasLazyLocalLexicalLookups() &&
1699  !hasLazyExternalLexicalLookups()) {
1700  if (StoredDeclsMap *Map = LookupPtr) {
1701  StoredDeclsMap::iterator Pos = Map->find(Name);
1702  if (Pos != Map->end()) {
1703  Results.insert(Results.end(),
1704  Pos->second.getLookupResult().begin(),
1705  Pos->second.getLookupResult().end());
1706  return;
1707  }
1708  }
1709  }
1710 
1711  // Slow case: grovel through the declarations in our chain looking for
1712  // matches.
1713  // FIXME: If we have lazy external declarations, this will not find them!
1714  // FIXME: Should we CollectAllContexts and walk them all here?
1715  for (Decl *D = FirstDecl; D; D = D->getNextDeclInContext()) {
1716  if (auto *ND = dyn_cast<NamedDecl>(D))
1717  if (ND->getDeclName() == Name)
1718  Results.push_back(ND);
1719  }
1720 }
1721 
1723  DeclContext *Ctx = this;
1724 
1725  // In C, a record type is the redeclaration context for its fields only. If
1726  // we arrive at a record context after skipping anything else, we should skip
1727  // the record as well. Currently, this means skipping enumerations because
1728  // they're the only transparent context that can exist within a struct or
1729  // union.
1730  bool SkipRecords = getDeclKind() == Decl::Kind::Enum &&
1731  !getParentASTContext().getLangOpts().CPlusPlus;
1732 
1733  // Skip through contexts to get to the redeclaration context. Transparent
1734  // contexts are always skipped.
1735  while ((SkipRecords && Ctx->isRecord()) || Ctx->isTransparentContext())
1736  Ctx = Ctx->getParent();
1737  return Ctx;
1738 }
1739 
1741  DeclContext *Ctx = this;
1742  // Skip through non-namespace, non-translation-unit contexts.
1743  while (!Ctx->isFileContext())
1744  Ctx = Ctx->getParent();
1745  return Ctx->getPrimaryContext();
1746 }
1747 
1749  // Loop until we find a non-record context.
1750  RecordDecl *OutermostRD = nullptr;
1751  DeclContext *DC = this;
1752  while (DC->isRecord()) {
1753  OutermostRD = cast<RecordDecl>(DC);
1754  DC = DC->getLexicalParent();
1755  }
1756  return OutermostRD;
1757 }
1758 
1760  // For non-file contexts, this is equivalent to Equals.
1761  if (!isFileContext())
1762  return O->Equals(this);
1763 
1764  do {
1765  if (O->Equals(this))
1766  return true;
1767 
1768  const auto *NS = dyn_cast<NamespaceDecl>(O);
1769  if (!NS || !NS->isInline())
1770  break;
1771  O = NS->getParent();
1772  } while (O);
1773 
1774  return false;
1775 }
1776 
1778  DeclContext *PrimaryDC = this->getPrimaryContext();
1779  DeclContext *DeclDC = D->getDeclContext()->getPrimaryContext();
1780  // If the decl is being added outside of its semantic decl context, we
1781  // need to ensure that we eagerly build the lookup information for it.
1782  PrimaryDC->makeDeclVisibleInContextWithFlags(D, false, PrimaryDC == DeclDC);
1783 }
1784 
1785 void DeclContext::makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1786  bool Recoverable) {
1787  assert(this == getPrimaryContext() && "expected a primary DC");
1788 
1789  if (!isLookupContext()) {
1790  if (isTransparentContext())
1791  getParent()->getPrimaryContext()
1792  ->makeDeclVisibleInContextWithFlags(D, Internal, Recoverable);
1793  return;
1794  }
1795 
1796  // Skip declarations which should be invisible to name lookup.
1797  if (shouldBeHidden(D))
1798  return;
1799 
1800  // If we already have a lookup data structure, perform the insertion into
1801  // it. If we might have externally-stored decls with this name, look them
1802  // up and perform the insertion. If this decl was declared outside its
1803  // semantic context, buildLookup won't add it, so add it now.
1804  //
1805  // FIXME: As a performance hack, don't add such decls into the translation
1806  // unit unless we're in C++, since qualified lookup into the TU is never
1807  // performed.
1808  if (LookupPtr || hasExternalVisibleStorage() ||
1809  ((!Recoverable || D->getDeclContext() != D->getLexicalDeclContext()) &&
1810  (getParentASTContext().getLangOpts().CPlusPlus ||
1811  !isTranslationUnit()))) {
1812  // If we have lazily omitted any decls, they might have the same name as
1813  // the decl which we are adding, so build a full lookup table before adding
1814  // this decl.
1815  buildLookup();
1816  makeDeclVisibleInContextImpl(D, Internal);
1817  } else {
1818  setHasLazyLocalLexicalLookups(true);
1819  }
1820 
1821  // If we are a transparent context or inline namespace, insert into our
1822  // parent context, too. This operation is recursive.
1823  if (isTransparentContext() || isInlineNamespace())
1824  getParent()->getPrimaryContext()->
1825  makeDeclVisibleInContextWithFlags(D, Internal, Recoverable);
1826 
1827  auto *DCAsDecl = cast<Decl>(this);
1828  // Notify that a decl was made visible unless we are a Tag being defined.
1829  if (!(isa<TagDecl>(DCAsDecl) && cast<TagDecl>(DCAsDecl)->isBeingDefined()))
1830  if (ASTMutationListener *L = DCAsDecl->getASTMutationListener())
1831  L->AddedVisibleDecl(this, D);
1832 }
1833 
1834 void DeclContext::makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal) {
1835  // Find or create the stored declaration map.
1836  StoredDeclsMap *Map = LookupPtr;
1837  if (!Map) {
1838  ASTContext *C = &getParentASTContext();
1839  Map = CreateStoredDeclsMap(*C);
1840  }
1841 
1842  // If there is an external AST source, load any declarations it knows about
1843  // with this declaration's name.
1844  // If the lookup table contains an entry about this name it means that we
1845  // have already checked the external source.
1846  if (!Internal)
1847  if (ExternalASTSource *Source = getParentASTContext().getExternalSource())
1848  if (hasExternalVisibleStorage() &&
1849  Map->find(D->getDeclName()) == Map->end())
1850  Source->FindExternalVisibleDeclsByName(this, D->getDeclName());
1851 
1852  // Insert this declaration into the map.
1853  StoredDeclsList &DeclNameEntries = (*Map)[D->getDeclName()];
1854 
1855  if (Internal) {
1856  // If this is being added as part of loading an external declaration,
1857  // this may not be the only external declaration with this name.
1858  // In this case, we never try to replace an existing declaration; we'll
1859  // handle that when we finalize the list of declarations for this name.
1860  DeclNameEntries.setHasExternalDecls();
1861  DeclNameEntries.AddSubsequentDecl(D);
1862  return;
1863  }
1864 
1865  if (DeclNameEntries.isNull()) {
1866  DeclNameEntries.setOnlyValue(D);
1867  return;
1868  }
1869 
1870  if (DeclNameEntries.HandleRedeclaration(D, /*IsKnownNewer*/!Internal)) {
1871  // This declaration has replaced an existing one for which
1872  // declarationReplaces returns true.
1873  return;
1874  }
1875 
1876  // Put this declaration into the appropriate slot.
1877  DeclNameEntries.AddSubsequentDecl(D);
1878 }
1879 
1881  return cast<UsingDirectiveDecl>(*I);
1882 }
1883 
1884 /// Returns iterator range [First, Last) of UsingDirectiveDecls stored within
1885 /// this context.
1887  // FIXME: Use something more efficient than normal lookup for using
1888  // directives. In C++, using directives are looked up more than anything else.
1889  lookup_result Result = lookup(UsingDirectiveDecl::getName());
1890  return udir_range(Result.begin(), Result.end());
1891 }
1892 
1893 //===----------------------------------------------------------------------===//
1894 // Creation and Destruction of StoredDeclsMaps. //
1895 //===----------------------------------------------------------------------===//
1896 
1897 StoredDeclsMap *DeclContext::CreateStoredDeclsMap(ASTContext &C) const {
1898  assert(!LookupPtr && "context already has a decls map");
1899  assert(getPrimaryContext() == this &&
1900  "creating decls map on non-primary context");
1901 
1902  StoredDeclsMap *M;
1903  bool Dependent = isDependentContext();
1904  if (Dependent)
1905  M = new DependentStoredDeclsMap();
1906  else
1907  M = new StoredDeclsMap();
1908  M->Previous = C.LastSDM;
1909  C.LastSDM = llvm::PointerIntPair<StoredDeclsMap*,1>(M, Dependent);
1910  LookupPtr = M;
1911  return M;
1912 }
1913 
1914 void ASTContext::ReleaseDeclContextMaps() {
1915  // It's okay to delete DependentStoredDeclsMaps via a StoredDeclsMap
1916  // pointer because the subclass doesn't add anything that needs to
1917  // be deleted.
1918  StoredDeclsMap::DestroyAll(LastSDM.getPointer(), LastSDM.getInt());
1919 }
1920 
1921 void StoredDeclsMap::DestroyAll(StoredDeclsMap *Map, bool Dependent) {
1922  while (Map) {
1923  // Advance the iteration before we invalidate memory.
1924  llvm::PointerIntPair<StoredDeclsMap*,1> Next = Map->Previous;
1925 
1926  if (Dependent)
1927  delete static_cast<DependentStoredDeclsMap*>(Map);
1928  else
1929  delete Map;
1930 
1931  Map = Next.getPointer();
1932  Dependent = Next.getInt();
1933  }
1934 }
1935 
1938  const PartialDiagnostic &PDiag) {
1939  assert(Parent->isDependentContext()
1940  && "cannot iterate dependent diagnostics of non-dependent context");
1941  Parent = Parent->getPrimaryContext();
1942  if (!Parent->LookupPtr)
1943  Parent->CreateStoredDeclsMap(C);
1944 
1945  auto *Map = static_cast<DependentStoredDeclsMap *>(Parent->LookupPtr);
1946 
1947  // Allocate the copy of the PartialDiagnostic via the ASTContext's
1948  // BumpPtrAllocator, rather than the ASTContext itself.
1949  PartialDiagnostic::Storage *DiagStorage = nullptr;
1950  if (PDiag.hasStorage())
1951  DiagStorage = new (C) PartialDiagnostic::Storage;
1952 
1953  auto *DD = new (C) DependentDiagnostic(PDiag, DiagStorage);
1954 
1955  // TODO: Maybe we shouldn't reverse the order during insertion.
1956  DD->NextDiagnostic = Map->FirstDiagnostic;
1957  Map->FirstDiagnostic = DD;
1958 
1959  return DD;
1960 }
static StringRef getRealizedPlatform(const AvailabilityAttr *A, const ASTContext &Context)
Definition: DeclBase.cpp:483
Defines the clang::ASTContext interface.
Represents a function declaration or definition.
Definition: Decl.h:1739
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:1684
VersionTuple getPlatformMinVersion() const
Retrieve the minimum desired version of the platform, to which the program should be compiled...
Definition: TargetInfo.h:1211
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:887
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:752
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2543
QualType getPointeeType() const
Definition: Type.h:2556
static bool shouldBeHidden(NamedDecl *D)
shouldBeHidden - Determine whether a declaration which was declared within its semantic context shoul...
Definition: DeclBase.cpp:1397
A (possibly-)qualified type.
Definition: Type.h:642
bool isBlockPointerType() const
Definition: Type.h:6290
TagDecl * getDefinition() const
Returns the TagDecl that actually defines this struct/union/class/enum.
Definition: Decl.cpp:3914
const char * getDeclKindName() const
Definition: DeclBase.cpp:123
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:240
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:68
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:868
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:979
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:475
static bool isLinkageSpecContext(const DeclContext *DC, LinkageSpecDecl::LanguageIDs ID)
Definition: DeclBase.cpp:1119
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3361
C Language Family Type Representation.
const char * getDeclKindName() const
Definition: DeclBase.cpp:155
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:54
static void add(Kind k)
Definition: DeclBase.cpp:193
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:953
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:792
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:980
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:254
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:321
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:747
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:380
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6716
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:119
bool isExternCContext() const
Determines whether this context or some of its ancestors is a linkage specification context that spec...
Definition: DeclBase.cpp:1129
bool isInvalidDecl() const
Definition: DeclBase.h:542
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:450
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:211
void removeDecl(Decl *D)
Removes a declaration from this context.
Definition: DeclBase.cpp:1421
bool hasWeakClassImport() const
Does this runtime support weakly importing classes?
Definition: ObjCRuntime.h:309
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:131
bool isLexicallyWithinFunctionOrMethod() const
Returns true if this declaration lexically is inside a function.
Definition: DeclBase.cpp:335
Represents a struct/union/class.
Definition: Decl.h:3602
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:1148
One of these records is kept for each identifier that is lexed.
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:347
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:1324
QualType getPointeeType() const
Definition: Type.h:2660
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:1187
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1872
Describes a module or submodule.
Definition: Module.h:65
virtual void updateOutOfDateIdentifier(IdentifierInfo &II)
Update an out-of-date identifier.
DeclContext * getEnclosingNamespaceContext()
Retrieve the nearest enclosing namespace context.
Definition: DeclBase.cpp:1740
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:141
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:422
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:779
StoredDeclsMap * buildLookup()
Ensure the lookup structure is fully-built and return it.
Definition: DeclBase.cpp:1522
static DeclContextLookupResult SetNoExternalVisibleDeclsForName(const DeclContext *DC, DeclarationName Name)
Definition: DeclBase.cpp:1309
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:821
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:118
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:739
Represents a linkage specification.
Definition: DeclCXX.h:2823
bool isExported() const
Whether this declaration is exported (by virtue of being lexically within an ExportDecl or by being a...
Definition: DeclBase.cpp:434
Ordinary names.
Definition: DeclBase.h:145
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
void addDeclInternal(Decl *D)
Add the declaration D into this context, but suppress searches for external declarations with the sam...
Definition: DeclBase.cpp:1507
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1587
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:73
NodeId Parent
Definition: ASTDiff.cpp:192
Decl * getNextDeclInContext()
Definition: DeclBase.h:424
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:655
udir_range using_directives() const
Returns iterator range [First, Last) of UsingDirectiveDecls stored within this context.
Definition: DeclBase.cpp:1886
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:589
Objective C @protocol.
Definition: DeclBase.h:148
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2278
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2005
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:961
void removeExternalDecls()
Remove any declarations which were imported from an external AST source.
int64_t getID() const
Definition: DeclBase.cpp:957
bool isInlineNamespace() const
Definition: DeclBase.cpp:1057
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1768
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:475
Defines the clang::LangOptions interface.
std::string Label
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:704
bool containsDecl(Decl *D) const
Checks whether a declaration is in this context.
Definition: DeclBase.cpp:1384
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
This declaration is an OpenMP user defined reduction construction.
Definition: DeclBase.h:179
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:1759
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:968
bool isFileContext() const
Definition: DeclBase.h:1818
DeclContext * getDeclContext()
Definition: DeclBase.h:427
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:1652
Decl * getNonClosureAncestor()
Find the nearest non-closure ancestor of this context, i.e.
Definition: DeclBase.cpp:1003
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:2422
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
bool containsDeclAndLoad(Decl *D) const
Checks whether a declaration is in this context.
Definition: DeclBase.cpp:1389
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:199
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:384
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
void collectAllContexts(SmallVectorImpl< DeclContext *> &Contexts)
Collects all of the declaration contexts that are semantically connected to this declaration context...
Definition: DeclBase.cpp:1223
SourceLocation getEnd() const
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1078
The result type of a method or function.
const SourceManager & SM
Definition: Format.cpp:1490
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
SmallVector< Attr *, 4 > AttrVec
AttrVec - A vector of Attr, which is how they are stored on the AST.
Definition: AttrIterator.h:49
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1104
virtual void DeclarationMarkedUsed(const Decl *D)
A declaration is marked used which was not previously marked used.
bool decls_empty() const
Definition: DeclBase.cpp:1377
AttrVec & getAttrs()
Definition: DeclBase.h:479
bool hasAttrs() const
Definition: DeclBase.h:473
Abstract interface for external sources of AST nodes.
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:226
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1745
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1777
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:218
StringRef getPlatformName() const
Retrieve the name of the platform as it is used in the availability attribute.
Definition: TargetInfo.h:1207
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:641
Encodes a location in the source.
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:137
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:784
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1371
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3073
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
bool isStdNamespace() const
Definition: DeclBase.cpp:1062
This file defines OpenMP nodes for declarative directives.
void print(raw_ostream &OS) const override
Definition: DeclBase.cpp:268
DeclContext(Decl::Kind K)
Definition: DeclBase.cpp:1011
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:695
UsingDirectiveDecl * operator*() const
Definition: DeclBase.cpp:1880
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:397
An array of decls optimized for the common case of only containing one entry.
void dropAttrs()
Definition: DeclBase.cpp:833
bool isWeakImported() const
Determine whether this is a weak-imported symbol.
Definition: DeclBase.cpp:685
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:1954
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:941
Dataflow Directional Tag Classes.
void updateOutOfDate(IdentifierInfo &II) const
Update a potentially out-of-date declaration.
Definition: DeclBase.cpp:63
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:1262
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:399
bool isRecord() const
Definition: DeclBase.h:1827
attr_range attrs() const
Definition: DeclBase.h:490
RecordDecl * getOuterLexicalRecordContext()
Retrieve the outermost lexically enclosing record context.
Definition: DeclBase.cpp:1748
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:421
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:999
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:126
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:2645
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:562
LanguageIDs
Represents the language in a linkage specification.
Definition: DeclCXX.h:2834
T * getAttr() const
Definition: DeclBase.h:527
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:707
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:1722
const LinkageSpecDecl * getExternCContext() const
Retrieve the nearest enclosing C linkage specification context.
Definition: DeclBase.cpp:1133
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1499
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:412
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:2201
void addHiddenDecl(Decl *D)
Add the declaration D to this context without modifying any lookup tables.
Definition: DeclBase.cpp:1473
static std::pair< Decl *, Decl * > BuildDeclChain(ArrayRef< Decl *> Decls, bool FieldsAlreadyLoaded)
Build up a chain of declarations.
Definition: DeclBase.cpp:1240
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:1047
void addAttr(Attr *A)
Definition: DeclBase.cpp:840
static bool classof(const Decl *D)
Definition: DeclBase.cpp:1021
Defines the clang::TargetInfo interface.
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1781
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:3651
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:90
__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:1921
static void PrintStats()
Definition: DeclBase.cpp:169
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:1158
bool trackLocalOwningModule() const
Do we need to track the owning module for a local declaration?
Definition: LangOptions.h:260
static void EnableStatistics()
Definition: DeclBase.cpp:165
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:596
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1823
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:457
TemplateDecl * getDescribedTemplate() const
If this is a declaration that describes some template, this method returns that template declaration...
Definition: DeclBase.cpp:230
Represents C++ using-directive.
Definition: DeclCXX.h:2913
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:471
bool isFunctionPointerType() const
Definition: Type.h:6306
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:357
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:361
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:1144
bool isTemplated() const
Determine whether this declaration is a templated entity (whether it is.
Definition: DeclBase.cpp:243
SourceLocation getBodyRBrace() const
getBodyRBrace - Gets the right brace of the body, if a body exists.
Definition: DeclBase.cpp:906
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:505
bool isBeingDefined() const
Return true if this decl is currently being defined.
Definition: Decl.h:3198
This declaration is a using declaration.
Definition: DeclBase.h:164
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:1110