clang  7.0.0svn
Sema.cpp
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1 //===--- Sema.cpp - AST Builder and Semantic Analysis 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 actions class which performs semantic analysis and
11 // builds an AST out of a parse stream.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclFriend.h"
19 #include "clang/AST/DeclObjC.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/StmtCXX.h"
26 #include "clang/Basic/TargetInfo.h"
27 #include "clang/Lex/HeaderSearch.h"
28 #include "clang/Lex/Preprocessor.h"
35 #include "clang/Sema/Scope.h"
36 #include "clang/Sema/ScopeInfo.h"
41 #include "llvm/ADT/DenseMap.h"
42 #include "llvm/ADT/SmallSet.h"
43 using namespace clang;
44 using namespace sema;
45 
47  return Lexer::getLocForEndOfToken(Loc, Offset, SourceMgr, LangOpts);
48 }
49 
50 ModuleLoader &Sema::getModuleLoader() const { return PP.getModuleLoader(); }
51 
53  const Preprocessor &PP) {
54  PrintingPolicy Policy = Context.getPrintingPolicy();
55  // In diagnostics, we print _Bool as bool if the latter is defined as the
56  // former.
57  Policy.Bool = Context.getLangOpts().Bool;
58  if (!Policy.Bool) {
59  if (const MacroInfo *BoolMacro = PP.getMacroInfo(Context.getBoolName())) {
60  Policy.Bool = BoolMacro->isObjectLike() &&
61  BoolMacro->getNumTokens() == 1 &&
62  BoolMacro->getReplacementToken(0).is(tok::kw__Bool);
63  }
64  }
65 
66  return Policy;
67 }
68 
70  TUScope = S;
71  PushDeclContext(S, Context.getTranslationUnitDecl());
72 }
73 
74 namespace clang {
75 namespace sema {
76 
77 class SemaPPCallbacks : public PPCallbacks {
78  Sema *S = nullptr;
80 
81 public:
82  void set(Sema &S) { this->S = &S; }
83 
84  void reset() { S = nullptr; }
85 
86  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
88  FileID PrevFID) override {
89  if (!S)
90  return;
91  switch (Reason) {
92  case EnterFile: {
94  SourceLocation IncludeLoc = SM.getIncludeLoc(SM.getFileID(Loc));
95  if (IncludeLoc.isValid()) {
96  IncludeStack.push_back(IncludeLoc);
99  }
100  break;
101  }
102  case ExitFile:
103  if (!IncludeStack.empty())
106  IncludeStack.pop_back_val());
107  break;
108  default:
109  break;
110  }
111  }
112 };
113 
114 } // end namespace sema
115 } // end namespace clang
116 
117 Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
118  TranslationUnitKind TUKind, CodeCompleteConsumer *CodeCompleter)
119  : ExternalSource(nullptr), isMultiplexExternalSource(false),
120  FPFeatures(pp.getLangOpts()), LangOpts(pp.getLangOpts()), PP(pp),
121  Context(ctxt), Consumer(consumer), Diags(PP.getDiagnostics()),
122  SourceMgr(PP.getSourceManager()), CollectStats(false),
123  CodeCompleter(CodeCompleter), CurContext(nullptr),
124  OriginalLexicalContext(nullptr), MSStructPragmaOn(false),
125  MSPointerToMemberRepresentationMethod(
126  LangOpts.getMSPointerToMemberRepresentationMethod()),
127  VtorDispStack(MSVtorDispAttr::Mode(LangOpts.VtorDispMode)), PackStack(0),
128  DataSegStack(nullptr), BSSSegStack(nullptr), ConstSegStack(nullptr),
129  CodeSegStack(nullptr), CurInitSeg(nullptr), VisContext(nullptr),
130  PragmaAttributeCurrentTargetDecl(nullptr),
131  IsBuildingRecoveryCallExpr(false), Cleanup{}, LateTemplateParser(nullptr),
132  LateTemplateParserCleanup(nullptr), OpaqueParser(nullptr), IdResolver(pp),
134  CXXTypeInfoDecl(nullptr), MSVCGuidDecl(nullptr), NSNumberDecl(nullptr),
135  NSValueDecl(nullptr), NSStringDecl(nullptr),
137  ValueWithBytesObjCTypeMethod(nullptr), NSArrayDecl(nullptr),
138  ArrayWithObjectsMethod(nullptr), NSDictionaryDecl(nullptr),
141  FullyCheckedComparisonCategories(
142  static_cast<unsigned>(ComparisonCategoryType::Last) + 1),
146  TyposCorrected(0), AnalysisWarnings(*this),
147  ThreadSafetyDeclCache(nullptr), VarDataSharingAttributesStack(nullptr),
148  CurScope(nullptr), Ident_super(nullptr), Ident___float128(nullptr) {
149  TUScope = nullptr;
150 
151  LoadedExternalKnownNamespaces = false;
152  for (unsigned I = 0; I != NSAPI::NumNSNumberLiteralMethods; ++I)
153  NSNumberLiteralMethods[I] = nullptr;
154 
155  if (getLangOpts().ObjC1)
156  NSAPIObj.reset(new NSAPI(Context));
157 
158  if (getLangOpts().CPlusPlus)
159  FieldCollector.reset(new CXXFieldCollector());
160 
161  // Tell diagnostics how to render things from the AST library.
163 
164  ExprEvalContexts.emplace_back(
166  nullptr, false);
167 
169 
170  // Initilization of data sharing attributes stack for OpenMP
171  InitDataSharingAttributesStack();
172 
173  std::unique_ptr<sema::SemaPPCallbacks> Callbacks =
174  llvm::make_unique<sema::SemaPPCallbacks>();
175  SemaPPCallbackHandler = Callbacks.get();
176  PP.addPPCallbacks(std::move(Callbacks));
177  SemaPPCallbackHandler->set(*this);
178 }
179 
180 void Sema::addImplicitTypedef(StringRef Name, QualType T) {
181  DeclarationName DN = &Context.Idents.get(Name);
182  if (IdResolver.begin(DN) == IdResolver.end())
184 }
185 
187  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
188  SC->InitializeSema(*this);
189 
190  // Tell the external Sema source about this Sema object.
191  if (ExternalSemaSource *ExternalSema
192  = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
193  ExternalSema->InitializeSema(*this);
194 
195  // This needs to happen after ExternalSemaSource::InitializeSema(this) or we
196  // will not be able to merge any duplicate __va_list_tag decls correctly.
197  VAListTagName = PP.getIdentifierInfo("__va_list_tag");
198 
199  if (!TUScope)
200  return;
201 
202  // Initialize predefined 128-bit integer types, if needed.
204  // If either of the 128-bit integer types are unavailable to name lookup,
205  // define them now.
206  DeclarationName Int128 = &Context.Idents.get("__int128_t");
207  if (IdResolver.begin(Int128) == IdResolver.end())
209 
210  DeclarationName UInt128 = &Context.Idents.get("__uint128_t");
211  if (IdResolver.begin(UInt128) == IdResolver.end())
213  }
214 
215 
216  // Initialize predefined Objective-C types:
217  if (getLangOpts().ObjC1) {
218  // If 'SEL' does not yet refer to any declarations, make it refer to the
219  // predefined 'SEL'.
220  DeclarationName SEL = &Context.Idents.get("SEL");
221  if (IdResolver.begin(SEL) == IdResolver.end())
223 
224  // If 'id' does not yet refer to any declarations, make it refer to the
225  // predefined 'id'.
227  if (IdResolver.begin(Id) == IdResolver.end())
229 
230  // Create the built-in typedef for 'Class'.
231  DeclarationName Class = &Context.Idents.get("Class");
232  if (IdResolver.begin(Class) == IdResolver.end())
234 
235  // Create the built-in forward declaratino for 'Protocol'.
236  DeclarationName Protocol = &Context.Idents.get("Protocol");
237  if (IdResolver.begin(Protocol) == IdResolver.end())
239  }
240 
241  // Create the internal type for the *StringMakeConstantString builtins.
242  DeclarationName ConstantString = &Context.Idents.get("__NSConstantString");
243  if (IdResolver.begin(ConstantString) == IdResolver.end())
245 
246  // Initialize Microsoft "predefined C++ types".
247  if (getLangOpts().MSVCCompat) {
248  if (getLangOpts().CPlusPlus &&
249  IdResolver.begin(&Context.Idents.get("type_info")) == IdResolver.end())
251  TUScope);
252 
254  }
255 
256  // Initialize predefined OpenCL types and supported extensions and (optional)
257  // core features.
258  if (getLangOpts().OpenCL) {
263  if (getLangOpts().OpenCLVersion >= 200) {
264  addImplicitTypedef("clk_event_t", Context.OCLClkEventTy);
266  addImplicitTypedef("reserve_id_t", Context.OCLReserveIDTy);
268  addImplicitTypedef("atomic_uint",
270  auto AtomicLongT = Context.getAtomicType(Context.LongTy);
271  addImplicitTypedef("atomic_long", AtomicLongT);
272  auto AtomicULongT = Context.getAtomicType(Context.UnsignedLongTy);
273  addImplicitTypedef("atomic_ulong", AtomicULongT);
274  addImplicitTypedef("atomic_float",
276  auto AtomicDoubleT = Context.getAtomicType(Context.DoubleTy);
277  addImplicitTypedef("atomic_double", AtomicDoubleT);
278  // OpenCLC v2.0, s6.13.11.6 requires that atomic_flag is implemented as
279  // 32-bit integer and OpenCLC v2.0, s6.1.1 int is always 32-bit wide.
281  auto AtomicIntPtrT = Context.getAtomicType(Context.getIntPtrType());
282  addImplicitTypedef("atomic_intptr_t", AtomicIntPtrT);
283  auto AtomicUIntPtrT = Context.getAtomicType(Context.getUIntPtrType());
284  addImplicitTypedef("atomic_uintptr_t", AtomicUIntPtrT);
285  auto AtomicSizeT = Context.getAtomicType(Context.getSizeType());
286  addImplicitTypedef("atomic_size_t", AtomicSizeT);
287  auto AtomicPtrDiffT = Context.getAtomicType(Context.getPointerDiffType());
288  addImplicitTypedef("atomic_ptrdiff_t", AtomicPtrDiffT);
289 
290  // OpenCL v2.0 s6.13.11.6:
291  // - The atomic_long and atomic_ulong types are supported if the
292  // cl_khr_int64_base_atomics and cl_khr_int64_extended_atomics
293  // extensions are supported.
294  // - The atomic_double type is only supported if double precision
295  // is supported and the cl_khr_int64_base_atomics and
296  // cl_khr_int64_extended_atomics extensions are supported.
297  // - If the device address space is 64-bits, the data types
298  // atomic_intptr_t, atomic_uintptr_t, atomic_size_t and
299  // atomic_ptrdiff_t are supported if the cl_khr_int64_base_atomics and
300  // cl_khr_int64_extended_atomics extensions are supported.
301  std::vector<QualType> Atomic64BitTypes;
302  Atomic64BitTypes.push_back(AtomicLongT);
303  Atomic64BitTypes.push_back(AtomicULongT);
304  Atomic64BitTypes.push_back(AtomicDoubleT);
305  if (Context.getTypeSize(AtomicSizeT) == 64) {
306  Atomic64BitTypes.push_back(AtomicSizeT);
307  Atomic64BitTypes.push_back(AtomicIntPtrT);
308  Atomic64BitTypes.push_back(AtomicUIntPtrT);
309  Atomic64BitTypes.push_back(AtomicPtrDiffT);
310  }
311  for (auto &I : Atomic64BitTypes)
313  "cl_khr_int64_base_atomics cl_khr_int64_extended_atomics");
314 
315  setOpenCLExtensionForType(AtomicDoubleT, "cl_khr_fp64");
316  }
317 
319 
320 #define GENERIC_IMAGE_TYPE_EXT(Type, Id, Ext) \
321  setOpenCLExtensionForType(Context.Id, Ext);
322 #include "clang/Basic/OpenCLImageTypes.def"
323  };
324 
326  DeclarationName MSVaList = &Context.Idents.get("__builtin_ms_va_list");
327  if (IdResolver.begin(MSVaList) == IdResolver.end())
329  }
330 
331  DeclarationName BuiltinVaList = &Context.Idents.get("__builtin_va_list");
332  if (IdResolver.begin(BuiltinVaList) == IdResolver.end())
334 }
335 
337  if (VisContext) FreeVisContext();
338 
339  // Kill all the active scopes.
341  if (FSI != PreallocatedFunctionScope.get())
342  delete FSI;
343 
344  // Tell the SemaConsumer to forget about us; we're going out of scope.
345  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
346  SC->ForgetSema();
347 
348  // Detach from the external Sema source.
349  if (ExternalSemaSource *ExternalSema
350  = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
351  ExternalSema->ForgetSema();
352 
353  // If Sema's ExternalSource is the multiplexer - we own it.
354  if (isMultiplexExternalSource)
355  delete ExternalSource;
356 
358 
359  // Destroys data sharing attributes stack for OpenMP
360  DestroyDataSharingAttributesStack();
361 
362  // Detach from the PP callback handler which outlives Sema since it's owned
363  // by the preprocessor.
364  SemaPPCallbackHandler->reset();
365 
366  assert(DelayedTypos.empty() && "Uncorrected typos!");
367 }
368 
369 /// makeUnavailableInSystemHeader - There is an error in the current
370 /// context. If we're still in a system header, and we can plausibly
371 /// make the relevant declaration unavailable instead of erroring, do
372 /// so and return true.
374  UnavailableAttr::ImplicitReason reason) {
375  // If we're not in a function, it's an error.
376  FunctionDecl *fn = dyn_cast<FunctionDecl>(CurContext);
377  if (!fn) return false;
378 
379  // If we're in template instantiation, it's an error.
381  return false;
382 
383  // If that function's not in a system header, it's an error.
385  return false;
386 
387  // If the function is already unavailable, it's not an error.
388  if (fn->hasAttr<UnavailableAttr>()) return true;
389 
390  fn->addAttr(UnavailableAttr::CreateImplicit(Context, "", reason, loc));
391  return true;
392 }
393 
396 }
397 
398 ///Registers an external source. If an external source already exists,
399 /// creates a multiplex external source and appends to it.
400 ///
401 ///\param[in] E - A non-null external sema source.
402 ///
404  assert(E && "Cannot use with NULL ptr");
405 
406  if (!ExternalSource) {
407  ExternalSource = E;
408  return;
409  }
410 
411  if (isMultiplexExternalSource)
412  static_cast<MultiplexExternalSemaSource*>(ExternalSource)->addSource(*E);
413  else {
414  ExternalSource = new MultiplexExternalSemaSource(*ExternalSource, *E);
415  isMultiplexExternalSource = true;
416  }
417 }
418 
419 /// Print out statistics about the semantic analysis.
420 void Sema::PrintStats() const {
421  llvm::errs() << "\n*** Semantic Analysis Stats:\n";
422  llvm::errs() << NumSFINAEErrors << " SFINAE diagnostics trapped.\n";
423 
424  BumpAlloc.PrintStats();
426 }
427 
429  QualType SrcType,
430  SourceLocation Loc) {
431  Optional<NullabilityKind> ExprNullability = SrcType->getNullability(Context);
432  if (!ExprNullability || *ExprNullability != NullabilityKind::Nullable)
433  return;
434 
435  Optional<NullabilityKind> TypeNullability = DstType->getNullability(Context);
436  if (!TypeNullability || *TypeNullability != NullabilityKind::NonNull)
437  return;
438 
439  Diag(Loc, diag::warn_nullability_lost) << SrcType << DstType;
440 }
441 
443  if (Diags.isIgnored(diag::warn_zero_as_null_pointer_constant,
444  E->getLocStart()))
445  return;
446  // nullptr only exists from C++11 on, so don't warn on its absence earlier.
447  if (!getLangOpts().CPlusPlus11)
448  return;
449 
450  if (Kind != CK_NullToPointer && Kind != CK_NullToMemberPointer)
451  return;
453  return;
454 
455  // If it is a macro from system header, and if the macro name is not "NULL",
456  // do not warn.
457  SourceLocation MaybeMacroLoc = E->getLocStart();
459  SourceMgr.isInSystemMacro(MaybeMacroLoc) &&
460  !findMacroSpelling(MaybeMacroLoc, "NULL"))
461  return;
462 
463  Diag(E->getLocStart(), diag::warn_zero_as_null_pointer_constant)
464  << FixItHint::CreateReplacement(E->getSourceRange(), "nullptr");
465 }
466 
467 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
468 /// If there is already an implicit cast, merge into the existing one.
469 /// The result is of the given category.
472  const CXXCastPath *BasePath,
473  CheckedConversionKind CCK) {
474 #ifndef NDEBUG
475  if (VK == VK_RValue && !E->isRValue()) {
476  switch (Kind) {
477  default:
478  llvm_unreachable("can't implicitly cast lvalue to rvalue with this cast "
479  "kind");
480  case CK_LValueToRValue:
481  case CK_ArrayToPointerDecay:
482  case CK_FunctionToPointerDecay:
483  case CK_ToVoid:
484  break;
485  }
486  }
487  assert((VK == VK_RValue || !E->isRValue()) && "can't cast rvalue to lvalue");
488 #endif
489 
492 
493  QualType ExprTy = Context.getCanonicalType(E->getType());
495 
496  if (ExprTy == TypeTy)
497  return E;
498 
499  // C++1z [conv.array]: The temporary materialization conversion is applied.
500  // We also use this to fuel C++ DR1213, which applies to C++11 onwards.
501  if (Kind == CK_ArrayToPointerDecay && getLangOpts().CPlusPlus &&
502  E->getValueKind() == VK_RValue) {
503  // The temporary is an lvalue in C++98 and an xvalue otherwise.
505  E->getType(), E, !getLangOpts().CPlusPlus11);
506  if (Materialized.isInvalid())
507  return ExprError();
508  E = Materialized.get();
509  }
510 
511  if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(E)) {
512  if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) {
513  ImpCast->setType(Ty);
514  ImpCast->setValueKind(VK);
515  return E;
516  }
517  }
518 
519  return ImplicitCastExpr::Create(Context, Ty, Kind, E, BasePath, VK);
520 }
521 
522 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
523 /// to the conversion from scalar type ScalarTy to the Boolean type.
525  switch (ScalarTy->getScalarTypeKind()) {
526  case Type::STK_Bool: return CK_NoOp;
527  case Type::STK_CPointer: return CK_PointerToBoolean;
528  case Type::STK_BlockPointer: return CK_PointerToBoolean;
529  case Type::STK_ObjCObjectPointer: return CK_PointerToBoolean;
530  case Type::STK_MemberPointer: return CK_MemberPointerToBoolean;
531  case Type::STK_Integral: return CK_IntegralToBoolean;
532  case Type::STK_Floating: return CK_FloatingToBoolean;
533  case Type::STK_IntegralComplex: return CK_IntegralComplexToBoolean;
534  case Type::STK_FloatingComplex: return CK_FloatingComplexToBoolean;
535  }
536  llvm_unreachable("unknown scalar type kind");
537 }
538 
539 /// Used to prune the decls of Sema's UnusedFileScopedDecls vector.
540 static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
541  if (D->getMostRecentDecl()->isUsed())
542  return true;
543 
544  if (D->isExternallyVisible())
545  return true;
546 
547  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
548  // If this is a function template and none of its specializations is used,
549  // we should warn.
550  if (FunctionTemplateDecl *Template = FD->getDescribedFunctionTemplate())
551  for (const auto *Spec : Template->specializations())
552  if (ShouldRemoveFromUnused(SemaRef, Spec))
553  return true;
554 
555  // UnusedFileScopedDecls stores the first declaration.
556  // The declaration may have become definition so check again.
557  const FunctionDecl *DeclToCheck;
558  if (FD->hasBody(DeclToCheck))
559  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
560 
561  // Later redecls may add new information resulting in not having to warn,
562  // so check again.
563  DeclToCheck = FD->getMostRecentDecl();
564  if (DeclToCheck != FD)
565  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
566  }
567 
568  if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
569  // If a variable usable in constant expressions is referenced,
570  // don't warn if it isn't used: if the value of a variable is required
571  // for the computation of a constant expression, it doesn't make sense to
572  // warn even if the variable isn't odr-used. (isReferenced doesn't
573  // precisely reflect that, but it's a decent approximation.)
574  if (VD->isReferenced() &&
575  VD->isUsableInConstantExpressions(SemaRef->Context))
576  return true;
577 
578  if (VarTemplateDecl *Template = VD->getDescribedVarTemplate())
579  // If this is a variable template and none of its specializations is used,
580  // we should warn.
581  for (const auto *Spec : Template->specializations())
582  if (ShouldRemoveFromUnused(SemaRef, Spec))
583  return true;
584 
585  // UnusedFileScopedDecls stores the first declaration.
586  // The declaration may have become definition so check again.
587  const VarDecl *DeclToCheck = VD->getDefinition();
588  if (DeclToCheck)
589  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
590 
591  // Later redecls may add new information resulting in not having to warn,
592  // so check again.
593  DeclToCheck = VD->getMostRecentDecl();
594  if (DeclToCheck != VD)
595  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
596  }
597 
598  return false;
599 }
600 
602  if (auto *FD = dyn_cast<FunctionDecl>(ND))
603  return FD->isExternC();
604  return cast<VarDecl>(ND)->isExternC();
605 }
606 
607 /// Determine whether ND is an external-linkage function or variable whose
608 /// type has no linkage.
610  // Note: it's not quite enough to check whether VD has UniqueExternalLinkage,
611  // because we also want to catch the case where its type has VisibleNoLinkage,
612  // which does not affect the linkage of VD.
613  return getLangOpts().CPlusPlus && VD->hasExternalFormalLinkage() &&
616 }
617 
618 /// Obtains a sorted list of functions and variables that are undefined but
619 /// ODR-used.
621  SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined) {
622  for (const auto &UndefinedUse : UndefinedButUsed) {
623  NamedDecl *ND = UndefinedUse.first;
624 
625  // Ignore attributes that have become invalid.
626  if (ND->isInvalidDecl()) continue;
627 
628  // __attribute__((weakref)) is basically a definition.
629  if (ND->hasAttr<WeakRefAttr>()) continue;
630 
631  if (isa<CXXDeductionGuideDecl>(ND))
632  continue;
633 
634  if (ND->hasAttr<DLLImportAttr>() || ND->hasAttr<DLLExportAttr>()) {
635  // An exported function will always be emitted when defined, so even if
636  // the function is inline, it doesn't have to be emitted in this TU. An
637  // imported function implies that it has been exported somewhere else.
638  continue;
639  }
640 
641  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
642  if (FD->isDefined())
643  continue;
644  if (FD->isExternallyVisible() &&
646  !FD->getMostRecentDecl()->isInlined())
647  continue;
648  } else {
649  auto *VD = cast<VarDecl>(ND);
650  if (VD->hasDefinition() != VarDecl::DeclarationOnly)
651  continue;
652  if (VD->isExternallyVisible() &&
654  !VD->getMostRecentDecl()->isInline())
655  continue;
656 
657  // Skip VarDecls that lack formal definitions but which we know are in
658  // fact defined somewhere.
659  if (VD->isKnownToBeDefined())
660  continue;
661  }
662 
663  Undefined.push_back(std::make_pair(ND, UndefinedUse.second));
664  }
665 }
666 
667 /// checkUndefinedButUsed - Check for undefined objects with internal linkage
668 /// or that are inline.
669 static void checkUndefinedButUsed(Sema &S) {
670  if (S.UndefinedButUsed.empty()) return;
671 
672  // Collect all the still-undefined entities with internal linkage.
674  S.getUndefinedButUsed(Undefined);
675  if (Undefined.empty()) return;
676 
677  for (auto Undef : Undefined) {
678  ValueDecl *VD = cast<ValueDecl>(Undef.first);
679  SourceLocation UseLoc = Undef.second;
680 
681  if (S.isExternalWithNoLinkageType(VD)) {
682  // C++ [basic.link]p8:
683  // A type without linkage shall not be used as the type of a variable
684  // or function with external linkage unless
685  // -- the entity has C language linkage
686  // -- the entity is not odr-used or is defined in the same TU
687  //
688  // As an extension, accept this in cases where the type is externally
689  // visible, since the function or variable actually can be defined in
690  // another translation unit in that case.
692  ? diag::ext_undefined_internal_type
693  : diag::err_undefined_internal_type)
694  << isa<VarDecl>(VD) << VD;
695  } else if (!VD->isExternallyVisible()) {
696  // FIXME: We can promote this to an error. The function or variable can't
697  // be defined anywhere else, so the program must necessarily violate the
698  // one definition rule.
699  S.Diag(VD->getLocation(), diag::warn_undefined_internal)
700  << isa<VarDecl>(VD) << VD;
701  } else if (auto *FD = dyn_cast<FunctionDecl>(VD)) {
702  (void)FD;
703  assert(FD->getMostRecentDecl()->isInlined() &&
704  "used object requires definition but isn't inline or internal?");
705  // FIXME: This is ill-formed; we should reject.
706  S.Diag(VD->getLocation(), diag::warn_undefined_inline) << VD;
707  } else {
708  assert(cast<VarDecl>(VD)->getMostRecentDecl()->isInline() &&
709  "used var requires definition but isn't inline or internal?");
710  S.Diag(VD->getLocation(), diag::err_undefined_inline_var) << VD;
711  }
712  if (UseLoc.isValid())
713  S.Diag(UseLoc, diag::note_used_here);
714  }
715 
716  S.UndefinedButUsed.clear();
717 }
718 
720  if (!ExternalSource)
721  return;
722 
724  ExternalSource->ReadWeakUndeclaredIdentifiers(WeakIDs);
725  for (auto &WeakID : WeakIDs)
726  WeakUndeclaredIdentifiers.insert(WeakID);
727 }
728 
729 
730 typedef llvm::DenseMap<const CXXRecordDecl*, bool> RecordCompleteMap;
731 
732 /// Returns true, if all methods and nested classes of the given
733 /// CXXRecordDecl are defined in this translation unit.
734 ///
735 /// Should only be called from ActOnEndOfTranslationUnit so that all
736 /// definitions are actually read.
738  RecordCompleteMap &MNCComplete) {
739  RecordCompleteMap::iterator Cache = MNCComplete.find(RD);
740  if (Cache != MNCComplete.end())
741  return Cache->second;
742  if (!RD->isCompleteDefinition())
743  return false;
744  bool Complete = true;
746  E = RD->decls_end();
747  I != E && Complete; ++I) {
748  if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(*I))
749  Complete = M->isDefined() || M->isDefaulted() ||
750  (M->isPure() && !isa<CXXDestructorDecl>(M));
751  else if (const FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(*I))
752  // If the template function is marked as late template parsed at this
753  // point, it has not been instantiated and therefore we have not
754  // performed semantic analysis on it yet, so we cannot know if the type
755  // can be considered complete.
756  Complete = !F->getTemplatedDecl()->isLateTemplateParsed() &&
757  F->getTemplatedDecl()->isDefined();
758  else if (const CXXRecordDecl *R = dyn_cast<CXXRecordDecl>(*I)) {
759  if (R->isInjectedClassName())
760  continue;
761  if (R->hasDefinition())
762  Complete = MethodsAndNestedClassesComplete(R->getDefinition(),
763  MNCComplete);
764  else
765  Complete = false;
766  }
767  }
768  MNCComplete[RD] = Complete;
769  return Complete;
770 }
771 
772 /// Returns true, if the given CXXRecordDecl is fully defined in this
773 /// translation unit, i.e. all methods are defined or pure virtual and all
774 /// friends, friend functions and nested classes are fully defined in this
775 /// translation unit.
776 ///
777 /// Should only be called from ActOnEndOfTranslationUnit so that all
778 /// definitions are actually read.
779 static bool IsRecordFullyDefined(const CXXRecordDecl *RD,
780  RecordCompleteMap &RecordsComplete,
781  RecordCompleteMap &MNCComplete) {
782  RecordCompleteMap::iterator Cache = RecordsComplete.find(RD);
783  if (Cache != RecordsComplete.end())
784  return Cache->second;
785  bool Complete = MethodsAndNestedClassesComplete(RD, MNCComplete);
787  E = RD->friend_end();
788  I != E && Complete; ++I) {
789  // Check if friend classes and methods are complete.
790  if (TypeSourceInfo *TSI = (*I)->getFriendType()) {
791  // Friend classes are available as the TypeSourceInfo of the FriendDecl.
792  if (CXXRecordDecl *FriendD = TSI->getType()->getAsCXXRecordDecl())
793  Complete = MethodsAndNestedClassesComplete(FriendD, MNCComplete);
794  else
795  Complete = false;
796  } else {
797  // Friend functions are available through the NamedDecl of FriendDecl.
798  if (const FunctionDecl *FD =
799  dyn_cast<FunctionDecl>((*I)->getFriendDecl()))
800  Complete = FD->isDefined();
801  else
802  // This is a template friend, give up.
803  Complete = false;
804  }
805  }
806  RecordsComplete[RD] = Complete;
807  return Complete;
808 }
809 
811  if (ExternalSource)
812  ExternalSource->ReadUnusedLocalTypedefNameCandidates(
815  if (TD->isReferenced())
816  continue;
817  Diag(TD->getLocation(), diag::warn_unused_local_typedef)
818  << isa<TypeAliasDecl>(TD) << TD->getDeclName();
819  }
820  UnusedLocalTypedefNameCandidates.clear();
821 }
822 
823 /// This is called before the very first declaration in the translation unit
824 /// is parsed. Note that the ASTContext may have already injected some
825 /// declarations.
827  if (getLangOpts().ModulesTS) {
828  SourceLocation StartOfTU =
830 
831  // We start in the global module; all those declarations are implicitly
832  // module-private (though they do not have module linkage).
833  auto &Map = PP.getHeaderSearchInfo().getModuleMap();
834  auto *GlobalModule = Map.createGlobalModuleForInterfaceUnit(StartOfTU);
835  assert(GlobalModule && "module creation should not fail");
836 
837  // Enter the scope of the global module.
838  ModuleScopes.push_back({});
839  ModuleScopes.back().Module = GlobalModule;
840  VisibleModules.setVisible(GlobalModule, StartOfTU);
841 
842  // All declarations created from now on are owned by the global module.
843  auto *TU = Context.getTranslationUnitDecl();
845  TU->setLocalOwningModule(GlobalModule);
846  }
847 }
848 
849 /// ActOnEndOfTranslationUnit - This is called at the very end of the
850 /// translation unit when EOF is reached and all but the top-level scope is
851 /// popped.
853  assert(DelayedDiagnostics.getCurrentPool() == nullptr
854  && "reached end of translation unit with a pool attached?");
855 
856  // If code completion is enabled, don't perform any end-of-translation-unit
857  // work.
859  return;
860 
861  // Transfer late parsed template instantiations over to the pending template
862  // instantiation list. During normal compliation, the late template parser
863  // will be installed and instantiating these templates will succeed.
864  //
865  // If we are building a TU prefix for serialization, it is also safe to
866  // transfer these over, even though they are not parsed. The end of the TU
867  // should be outside of any eager template instantiation scope, so when this
868  // AST is deserialized, these templates will not be parsed until the end of
869  // the combined TU.
871  LateParsedInstantiations.begin(),
873  LateParsedInstantiations.clear();
874 
875  // Complete translation units and modules define vtables and perform implicit
876  // instantiations. PCH files do not.
877  if (TUKind != TU_Prefix) {
879 
880  // If DefinedUsedVTables ends up marking any virtual member functions it
881  // might lead to more pending template instantiations, which we then need
882  // to instantiate.
884 
885  // C++: Perform implicit template instantiations.
886  //
887  // FIXME: When we perform these implicit instantiations, we do not
888  // carefully keep track of the point of instantiation (C++ [temp.point]).
889  // This means that name lookup that occurs within the template
890  // instantiation will always happen at the end of the translation unit,
891  // so it will find some names that are not required to be found. This is
892  // valid, but we could do better by diagnosing if an instantiation uses a
893  // name that was not visible at its first point of instantiation.
894  if (ExternalSource) {
895  // Load pending instantiations from the external source.
897  ExternalSource->ReadPendingInstantiations(Pending);
898  for (auto PII : Pending)
899  if (auto Func = dyn_cast<FunctionDecl>(PII.first))
900  Func->setInstantiationIsPending(true);
902  Pending.begin(), Pending.end());
903  }
904 
906 
907  assert(LateParsedInstantiations.empty() &&
908  "end of TU template instantiation should not create more "
909  "late-parsed templates");
910 
913 
915  }
916 
919 
920  // All delayed member exception specs should be checked or we end up accepting
921  // incompatible declarations.
922  // FIXME: This is wrong for TUKind == TU_Prefix. In that case, we need to
923  // write out the lists to the AST file (if any).
924  assert(DelayedDefaultedMemberExceptionSpecs.empty());
925  assert(DelayedExceptionSpecChecks.empty());
926 
927  // All dllexport classes should have been processed already.
928  assert(DelayedDllExportClasses.empty());
929 
930  // Remove file scoped decls that turned out to be used.
932  std::remove_if(UnusedFileScopedDecls.begin(nullptr, true),
934  [this](const DeclaratorDecl *DD) {
935  return ShouldRemoveFromUnused(this, DD);
936  }),
938 
939  if (TUKind == TU_Prefix) {
940  // Translation unit prefixes don't need any of the checking below.
942  TUScope = nullptr;
943  return;
944  }
945 
946  // Check for #pragma weak identifiers that were never declared
948  for (auto WeakID : WeakUndeclaredIdentifiers) {
949  if (WeakID.second.getUsed())
950  continue;
951 
952  Decl *PrevDecl = LookupSingleName(TUScope, WeakID.first, SourceLocation(),
954  if (PrevDecl != nullptr &&
955  !(isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl)))
956  Diag(WeakID.second.getLocation(), diag::warn_attribute_wrong_decl_type)
957  << "'weak'" << ExpectedVariableOrFunction;
958  else
959  Diag(WeakID.second.getLocation(), diag::warn_weak_identifier_undeclared)
960  << WeakID.first;
961  }
962 
963  if (LangOpts.CPlusPlus11 &&
964  !Diags.isIgnored(diag::warn_delegating_ctor_cycle, SourceLocation()))
966 
967  if (!Diags.hasErrorOccurred()) {
968  if (ExternalSource)
969  ExternalSource->ReadUndefinedButUsed(UndefinedButUsed);
970  checkUndefinedButUsed(*this);
971  }
972 
973  if (TUKind == TU_Module) {
974  // If we are building a module interface unit, we need to have seen the
975  // module declaration by now.
976  if (getLangOpts().getCompilingModule() ==
978  ModuleScopes.back().Module->Kind != Module::ModuleInterfaceUnit) {
979  // FIXME: Make a better guess as to where to put the module declaration.
980  Diag(getSourceManager().getLocForStartOfFile(
981  getSourceManager().getMainFileID()),
982  diag::err_module_declaration_missing);
983  }
984 
985  // If we are building a module, resolve all of the exported declarations
986  // now.
987  if (Module *CurrentModule = PP.getCurrentModule()) {
989 
991  Stack.push_back(CurrentModule);
992  while (!Stack.empty()) {
993  Module *Mod = Stack.pop_back_val();
994 
995  // Resolve the exported declarations and conflicts.
996  // FIXME: Actually complain, once we figure out how to teach the
997  // diagnostic client to deal with complaints in the module map at this
998  // point.
999  ModMap.resolveExports(Mod, /*Complain=*/false);
1000  ModMap.resolveUses(Mod, /*Complain=*/false);
1001  ModMap.resolveConflicts(Mod, /*Complain=*/false);
1002 
1003  // Queue the submodules, so their exports will also be resolved.
1004  Stack.append(Mod->submodule_begin(), Mod->submodule_end());
1005  }
1006  }
1007 
1008  // Warnings emitted in ActOnEndOfTranslationUnit() should be emitted for
1009  // modules when they are built, not every time they are used.
1011 
1012  // Modules don't need any of the checking below.
1014  TUScope = nullptr;
1015  return;
1016  }
1017 
1018  // C99 6.9.2p2:
1019  // A declaration of an identifier for an object that has file
1020  // scope without an initializer, and without a storage-class
1021  // specifier or with the storage-class specifier static,
1022  // constitutes a tentative definition. If a translation unit
1023  // contains one or more tentative definitions for an identifier,
1024  // and the translation unit contains no external definition for
1025  // that identifier, then the behavior is exactly as if the
1026  // translation unit contains a file scope declaration of that
1027  // identifier, with the composite type as of the end of the
1028  // translation unit, with an initializer equal to 0.
1029  llvm::SmallSet<VarDecl *, 32> Seen;
1030  for (TentativeDefinitionsType::iterator
1031  T = TentativeDefinitions.begin(ExternalSource),
1032  TEnd = TentativeDefinitions.end();
1033  T != TEnd; ++T)
1034  {
1035  VarDecl *VD = (*T)->getActingDefinition();
1036 
1037  // If the tentative definition was completed, getActingDefinition() returns
1038  // null. If we've already seen this variable before, insert()'s second
1039  // return value is false.
1040  if (!VD || VD->isInvalidDecl() || !Seen.insert(VD).second)
1041  continue;
1042 
1043  if (const IncompleteArrayType *ArrayT
1045  // Set the length of the array to 1 (C99 6.9.2p5).
1046  Diag(VD->getLocation(), diag::warn_tentative_incomplete_array);
1047  llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true);
1048  QualType T = Context.getConstantArrayType(ArrayT->getElementType(),
1049  One, ArrayType::Normal, 0);
1050  VD->setType(T);
1051  } else if (RequireCompleteType(VD->getLocation(), VD->getType(),
1052  diag::err_tentative_def_incomplete_type))
1053  VD->setInvalidDecl();
1054 
1055  // No initialization is performed for a tentative definition.
1057 
1058  // Notify the consumer that we've completed a tentative definition.
1059  if (!VD->isInvalidDecl())
1061 
1062  }
1063 
1064  // If there were errors, disable 'unused' warnings since they will mostly be
1065  // noise.
1066  if (!Diags.hasErrorOccurred()) {
1067  // Output warning for unused file scoped decls.
1068  for (UnusedFileScopedDeclsType::iterator
1069  I = UnusedFileScopedDecls.begin(ExternalSource),
1070  E = UnusedFileScopedDecls.end(); I != E; ++I) {
1071  if (ShouldRemoveFromUnused(this, *I))
1072  continue;
1073 
1074  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
1075  const FunctionDecl *DiagD;
1076  if (!FD->hasBody(DiagD))
1077  DiagD = FD;
1078  if (DiagD->isDeleted())
1079  continue; // Deleted functions are supposed to be unused.
1080  if (DiagD->isReferenced()) {
1081  if (isa<CXXMethodDecl>(DiagD))
1082  Diag(DiagD->getLocation(), diag::warn_unneeded_member_function)
1083  << DiagD->getDeclName();
1084  else {
1085  if (FD->getStorageClass() == SC_Static &&
1086  !FD->isInlineSpecified() &&
1088  SourceMgr.getExpansionLoc(FD->getLocation())))
1089  Diag(DiagD->getLocation(),
1090  diag::warn_unneeded_static_internal_decl)
1091  << DiagD->getDeclName();
1092  else
1093  Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
1094  << /*function*/0 << DiagD->getDeclName();
1095  }
1096  } else {
1097  if (FD->getDescribedFunctionTemplate())
1098  Diag(DiagD->getLocation(), diag::warn_unused_template)
1099  << /*function*/0 << DiagD->getDeclName();
1100  else
1101  Diag(DiagD->getLocation(),
1102  isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function
1103  : diag::warn_unused_function)
1104  << DiagD->getDeclName();
1105  }
1106  } else {
1107  const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition();
1108  if (!DiagD)
1109  DiagD = cast<VarDecl>(*I);
1110  if (DiagD->isReferenced()) {
1111  Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
1112  << /*variable*/1 << DiagD->getDeclName();
1113  } else if (DiagD->getType().isConstQualified()) {
1114  const SourceManager &SM = SourceMgr;
1115  if (SM.getMainFileID() != SM.getFileID(DiagD->getLocation()) ||
1117  Diag(DiagD->getLocation(), diag::warn_unused_const_variable)
1118  << DiagD->getDeclName();
1119  } else {
1120  if (DiagD->getDescribedVarTemplate())
1121  Diag(DiagD->getLocation(), diag::warn_unused_template)
1122  << /*variable*/1 << DiagD->getDeclName();
1123  else
1124  Diag(DiagD->getLocation(), diag::warn_unused_variable)
1125  << DiagD->getDeclName();
1126  }
1127  }
1128  }
1129 
1131  }
1132 
1133  if (!Diags.isIgnored(diag::warn_unused_private_field, SourceLocation())) {
1134  RecordCompleteMap RecordsComplete;
1135  RecordCompleteMap MNCComplete;
1136  for (NamedDeclSetType::iterator I = UnusedPrivateFields.begin(),
1137  E = UnusedPrivateFields.end(); I != E; ++I) {
1138  const NamedDecl *D = *I;
1139  const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
1140  if (RD && !RD->isUnion() &&
1141  IsRecordFullyDefined(RD, RecordsComplete, MNCComplete)) {
1142  Diag(D->getLocation(), diag::warn_unused_private_field)
1143  << D->getDeclName();
1144  }
1145  }
1146  }
1147 
1148  if (!Diags.isIgnored(diag::warn_mismatched_delete_new, SourceLocation())) {
1149  if (ExternalSource)
1151  for (const auto &DeletedFieldInfo : DeleteExprs) {
1152  for (const auto &DeleteExprLoc : DeletedFieldInfo.second) {
1153  AnalyzeDeleteExprMismatch(DeletedFieldInfo.first, DeleteExprLoc.first,
1154  DeleteExprLoc.second);
1155  }
1156  }
1157  }
1158 
1159  // Check we've noticed that we're no longer parsing the initializer for every
1160  // variable. If we miss cases, then at best we have a performance issue and
1161  // at worst a rejects-valid bug.
1162  assert(ParsingInitForAutoVars.empty() &&
1163  "Didn't unmark var as having its initializer parsed");
1164 
1166  TUScope = nullptr;
1167 }
1168 
1169 
1170 //===----------------------------------------------------------------------===//
1171 // Helper functions.
1172 //===----------------------------------------------------------------------===//
1173 
1175  DeclContext *DC = CurContext;
1176 
1177  while (true) {
1178  if (isa<BlockDecl>(DC) || isa<EnumDecl>(DC) || isa<CapturedDecl>(DC)) {
1179  DC = DC->getParent();
1180  } else if (isa<CXXMethodDecl>(DC) &&
1181  cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call &&
1182  cast<CXXRecordDecl>(DC->getParent())->isLambda()) {
1183  DC = DC->getParent()->getParent();
1184  }
1185  else break;
1186  }
1187 
1188  return DC;
1189 }
1190 
1191 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
1192 /// to the function decl for the function being parsed. If we're currently
1193 /// in a 'block', this returns the containing context.
1196  return dyn_cast<FunctionDecl>(DC);
1197 }
1198 
1201  while (isa<RecordDecl>(DC))
1202  DC = DC->getParent();
1203  return dyn_cast<ObjCMethodDecl>(DC);
1204 }
1205 
1208  if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC))
1209  return cast<NamedDecl>(DC);
1210  return nullptr;
1211 }
1212 
1213 void Sema::EmitCurrentDiagnostic(unsigned DiagID) {
1214  // FIXME: It doesn't make sense to me that DiagID is an incoming argument here
1215  // and yet we also use the current diag ID on the DiagnosticsEngine. This has
1216  // been made more painfully obvious by the refactor that introduced this
1217  // function, but it is possible that the incoming argument can be
1218  // eliminated. If it truly cannot be (for example, there is some reentrancy
1219  // issue I am not seeing yet), then there should at least be a clarifying
1220  // comment somewhere.
1223  Diags.getCurrentDiagID())) {
1225  // We'll report the diagnostic below.
1226  break;
1227 
1229  // Count this failure so that we know that template argument deduction
1230  // has failed.
1231  ++NumSFINAEErrors;
1232 
1233  // Make a copy of this suppressed diagnostic and store it with the
1234  // template-deduction information.
1235  if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
1236  Diagnostic DiagInfo(&Diags);
1237  (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
1239  }
1240 
1242  Diags.Clear();
1243  return;
1244 
1246  // Per C++ Core Issue 1170, access control is part of SFINAE.
1247  // Additionally, the AccessCheckingSFINAE flag can be used to temporarily
1248  // make access control a part of SFINAE for the purposes of checking
1249  // type traits.
1251  break;
1252 
1254 
1255  // Suppress this diagnostic.
1256  ++NumSFINAEErrors;
1257 
1258  // Make a copy of this suppressed diagnostic and store it with the
1259  // template-deduction information.
1260  if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
1261  Diagnostic DiagInfo(&Diags);
1262  (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
1264  }
1265 
1267  Diags.Clear();
1268 
1269  // Now the diagnostic state is clear, produce a C++98 compatibility
1270  // warning.
1271  Diag(Loc, diag::warn_cxx98_compat_sfinae_access_control);
1272 
1273  // The last diagnostic which Sema produced was ignored. Suppress any
1274  // notes attached to it.
1276  return;
1277  }
1278 
1280  // Make a copy of this suppressed diagnostic and store it with the
1281  // template-deduction information;
1282  if (*Info) {
1283  Diagnostic DiagInfo(&Diags);
1284  (*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(),
1286  }
1287 
1288  // Suppress this diagnostic.
1290  Diags.Clear();
1291  return;
1292  }
1293  }
1294 
1295  // Copy the diagnostic printing policy over the ASTContext printing policy.
1296  // TODO: Stop doing that. See: https://reviews.llvm.org/D45093#1090292
1298 
1299  // Emit the diagnostic.
1301  return;
1302 
1303  // If this is not a note, and we're in a template instantiation
1304  // that is different from the last template instantiation where
1305  // we emitted an error, print a template instantiation
1306  // backtrace.
1307  if (!DiagnosticIDs::isBuiltinNote(DiagID))
1309 }
1310 
1313  SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID()));
1314  PD.Emit(Builder);
1315 
1316  return Builder;
1317 }
1318 
1319 /// Looks through the macro-expansion chain for the given
1320 /// location, looking for a macro expansion with the given name.
1321 /// If one is found, returns true and sets the location to that
1322 /// expansion loc.
1323 bool Sema::findMacroSpelling(SourceLocation &locref, StringRef name) {
1324  SourceLocation loc = locref;
1325  if (!loc.isMacroID()) return false;
1326 
1327  // There's no good way right now to look at the intermediate
1328  // expansions, so just jump to the expansion location.
1329  loc = getSourceManager().getExpansionLoc(loc);
1330 
1331  // If that's written with the name, stop here.
1332  SmallVector<char, 16> buffer;
1333  if (getPreprocessor().getSpelling(loc, buffer) == name) {
1334  locref = loc;
1335  return true;
1336  }
1337  return false;
1338 }
1339 
1340 /// Determines the active Scope associated with the given declaration
1341 /// context.
1342 ///
1343 /// This routine maps a declaration context to the active Scope object that
1344 /// represents that declaration context in the parser. It is typically used
1345 /// from "scope-less" code (e.g., template instantiation, lazy creation of
1346 /// declarations) that injects a name for name-lookup purposes and, therefore,
1347 /// must update the Scope.
1348 ///
1349 /// \returns The scope corresponding to the given declaraion context, or NULL
1350 /// if no such scope is open.
1352 
1353  if (!Ctx)
1354  return nullptr;
1355 
1356  Ctx = Ctx->getPrimaryContext();
1357  for (Scope *S = getCurScope(); S; S = S->getParent()) {
1358  // Ignore scopes that cannot have declarations. This is important for
1359  // out-of-line definitions of static class members.
1360  if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope))
1361  if (DeclContext *Entity = S->getEntity())
1362  if (Ctx == Entity->getPrimaryContext())
1363  return S;
1364  }
1365 
1366  return nullptr;
1367 }
1368 
1369 /// Enter a new function scope
1371  if (FunctionScopes.empty()) {
1372  // Use PreallocatedFunctionScope to avoid allocating memory when possible.
1373  PreallocatedFunctionScope->Clear();
1374  FunctionScopes.push_back(PreallocatedFunctionScope.get());
1375  } else {
1377  }
1378  if (LangOpts.OpenMP)
1379  pushOpenMPFunctionRegion();
1380 }
1381 
1382 void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) {
1384  BlockScope, Block));
1385 }
1386 
1388  LambdaScopeInfo *const LSI = new LambdaScopeInfo(getDiagnostics());
1389  FunctionScopes.push_back(LSI);
1390  return LSI;
1391 }
1392 
1394  if (LambdaScopeInfo *const LSI = getCurLambda()) {
1395  LSI->AutoTemplateParameterDepth = Depth;
1396  return;
1397  }
1398  llvm_unreachable(
1399  "Remove assertion if intentionally called in a non-lambda context.");
1400 }
1401 
1403  const Decl *D, const BlockExpr *blkExpr) {
1404  assert(!FunctionScopes.empty() && "mismatched push/pop!");
1405  FunctionScopeInfo *Scope = FunctionScopes.pop_back_val();
1406 
1407  if (LangOpts.OpenMP)
1408  popOpenMPFunctionRegion(Scope);
1409 
1410  // Issue any analysis-based warnings.
1411  if (WP && D)
1412  AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr);
1413  else
1414  for (const auto &PUD : Scope->PossiblyUnreachableDiags)
1415  Diag(PUD.Loc, PUD.PD);
1416 
1417  // Delete the scope unless its our preallocated scope.
1418  if (Scope != PreallocatedFunctionScope.get())
1419  delete Scope;
1420 }
1421 
1422 void Sema::PushCompoundScope(bool IsStmtExpr) {
1423  getCurFunction()->CompoundScopes.push_back(CompoundScopeInfo(IsStmtExpr));
1424 }
1425 
1427  FunctionScopeInfo *CurFunction = getCurFunction();
1428  assert(!CurFunction->CompoundScopes.empty() && "mismatched push/pop");
1429 
1430  CurFunction->CompoundScopes.pop_back();
1431 }
1432 
1433 /// Determine whether any errors occurred within this function/method/
1434 /// block.
1437 }
1438 
1440  if (!FunctionScopes.empty())
1441  FunctionScopes.back()->setHasBranchIntoScope();
1442 }
1443 
1445  if (!FunctionScopes.empty())
1446  FunctionScopes.back()->setHasBranchProtectedScope();
1447 }
1448 
1450  if (!FunctionScopes.empty())
1451  FunctionScopes.back()->setHasIndirectGoto();
1452 }
1453 
1455  if (FunctionScopes.empty())
1456  return nullptr;
1457 
1458  auto CurBSI = dyn_cast<BlockScopeInfo>(FunctionScopes.back());
1459  if (CurBSI && CurBSI->TheDecl &&
1460  !CurBSI->TheDecl->Encloses(CurContext)) {
1461  // We have switched contexts due to template instantiation.
1462  assert(!CodeSynthesisContexts.empty());
1463  return nullptr;
1464  }
1465 
1466  return CurBSI;
1467 }
1468 
1470  if (FunctionScopes.empty())
1471  return nullptr;
1472 
1473  for (int e = FunctionScopes.size() - 1; e >= 0; --e) {
1474  if (isa<sema::BlockScopeInfo>(FunctionScopes[e]))
1475  continue;
1476  return FunctionScopes[e];
1477  }
1478  return nullptr;
1479 }
1480 
1481 LambdaScopeInfo *Sema::getCurLambda(bool IgnoreNonLambdaCapturingScope) {
1482  if (FunctionScopes.empty())
1483  return nullptr;
1484 
1485  auto I = FunctionScopes.rbegin();
1486  if (IgnoreNonLambdaCapturingScope) {
1487  auto E = FunctionScopes.rend();
1488  while (I != E && isa<CapturingScopeInfo>(*I) && !isa<LambdaScopeInfo>(*I))
1489  ++I;
1490  if (I == E)
1491  return nullptr;
1492  }
1493  auto *CurLSI = dyn_cast<LambdaScopeInfo>(*I);
1494  if (CurLSI && CurLSI->Lambda &&
1495  !CurLSI->Lambda->Encloses(CurContext)) {
1496  // We have switched contexts due to template instantiation.
1497  assert(!CodeSynthesisContexts.empty());
1498  return nullptr;
1499  }
1500 
1501  return CurLSI;
1502 }
1503 // We have a generic lambda if we parsed auto parameters, or we have
1504 // an associated template parameter list.
1506  if (LambdaScopeInfo *LSI = getCurLambda()) {
1507  return (LSI->AutoTemplateParams.size() ||
1508  LSI->GLTemplateParameterList) ? LSI : nullptr;
1509  }
1510  return nullptr;
1511 }
1512 
1513 
1515  if (!LangOpts.RetainCommentsFromSystemHeaders &&
1516  SourceMgr.isInSystemHeader(Comment.getBegin()))
1517  return;
1518  RawComment RC(SourceMgr, Comment, LangOpts.CommentOpts, false);
1519  if (RC.isAlmostTrailingComment()) {
1520  SourceRange MagicMarkerRange(Comment.getBegin(),
1521  Comment.getBegin().getLocWithOffset(3));
1522  StringRef MagicMarkerText;
1523  switch (RC.getKind()) {
1525  MagicMarkerText = "///<";
1526  break;
1528  MagicMarkerText = "/**<";
1529  break;
1530  default:
1531  llvm_unreachable("if this is an almost Doxygen comment, "
1532  "it should be ordinary");
1533  }
1534  Diag(Comment.getBegin(), diag::warn_not_a_doxygen_trailing_member_comment) <<
1535  FixItHint::CreateReplacement(MagicMarkerRange, MagicMarkerText);
1536  }
1537  Context.addComment(RC);
1538 }
1539 
1540 // Pin this vtable to this file.
1542 
1545 
1547  SmallVectorImpl<NamespaceDecl *> &Namespaces) {
1548 }
1549 
1551  llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {}
1552 
1554  FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &) {}
1555 
1556 /// Figure out if an expression could be turned into a call.
1557 ///
1558 /// Use this when trying to recover from an error where the programmer may have
1559 /// written just the name of a function instead of actually calling it.
1560 ///
1561 /// \param E - The expression to examine.
1562 /// \param ZeroArgCallReturnTy - If the expression can be turned into a call
1563 /// with no arguments, this parameter is set to the type returned by such a
1564 /// call; otherwise, it is set to an empty QualType.
1565 /// \param OverloadSet - If the expression is an overloaded function
1566 /// name, this parameter is populated with the decls of the various overloads.
1567 bool Sema::tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy,
1568  UnresolvedSetImpl &OverloadSet) {
1569  ZeroArgCallReturnTy = QualType();
1570  OverloadSet.clear();
1571 
1572  const OverloadExpr *Overloads = nullptr;
1573  bool IsMemExpr = false;
1574  if (E.getType() == Context.OverloadTy) {
1575  OverloadExpr::FindResult FR = OverloadExpr::find(const_cast<Expr*>(&E));
1576 
1577  // Ignore overloads that are pointer-to-member constants.
1578  if (FR.HasFormOfMemberPointer)
1579  return false;
1580 
1581  Overloads = FR.Expression;
1582  } else if (E.getType() == Context.BoundMemberTy) {
1583  Overloads = dyn_cast<UnresolvedMemberExpr>(E.IgnoreParens());
1584  IsMemExpr = true;
1585  }
1586 
1587  bool Ambiguous = false;
1588 
1589  if (Overloads) {
1590  for (OverloadExpr::decls_iterator it = Overloads->decls_begin(),
1591  DeclsEnd = Overloads->decls_end(); it != DeclsEnd; ++it) {
1592  OverloadSet.addDecl(*it);
1593 
1594  // Check whether the function is a non-template, non-member which takes no
1595  // arguments.
1596  if (IsMemExpr)
1597  continue;
1598  if (const FunctionDecl *OverloadDecl
1599  = dyn_cast<FunctionDecl>((*it)->getUnderlyingDecl())) {
1600  if (OverloadDecl->getMinRequiredArguments() == 0) {
1601  if (!ZeroArgCallReturnTy.isNull() && !Ambiguous) {
1602  ZeroArgCallReturnTy = QualType();
1603  Ambiguous = true;
1604  } else
1605  ZeroArgCallReturnTy = OverloadDecl->getReturnType();
1606  }
1607  }
1608  }
1609 
1610  // If it's not a member, use better machinery to try to resolve the call
1611  if (!IsMemExpr)
1612  return !ZeroArgCallReturnTy.isNull();
1613  }
1614 
1615  // Attempt to call the member with no arguments - this will correctly handle
1616  // member templates with defaults/deduction of template arguments, overloads
1617  // with default arguments, etc.
1618  if (IsMemExpr && !E.isTypeDependent()) {
1619  bool Suppress = getDiagnostics().getSuppressAllDiagnostics();
1622  None, SourceLocation());
1624  if (R.isUsable()) {
1625  ZeroArgCallReturnTy = R.get()->getType();
1626  return true;
1627  }
1628  return false;
1629  }
1630 
1631  if (const DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E.IgnoreParens())) {
1632  if (const FunctionDecl *Fun = dyn_cast<FunctionDecl>(DeclRef->getDecl())) {
1633  if (Fun->getMinRequiredArguments() == 0)
1634  ZeroArgCallReturnTy = Fun->getReturnType();
1635  return true;
1636  }
1637  }
1638 
1639  // We don't have an expression that's convenient to get a FunctionDecl from,
1640  // but we can at least check if the type is "function of 0 arguments".
1641  QualType ExprTy = E.getType();
1642  const FunctionType *FunTy = nullptr;
1643  QualType PointeeTy = ExprTy->getPointeeType();
1644  if (!PointeeTy.isNull())
1645  FunTy = PointeeTy->getAs<FunctionType>();
1646  if (!FunTy)
1647  FunTy = ExprTy->getAs<FunctionType>();
1648 
1649  if (const FunctionProtoType *FPT =
1650  dyn_cast_or_null<FunctionProtoType>(FunTy)) {
1651  if (FPT->getNumParams() == 0)
1652  ZeroArgCallReturnTy = FunTy->getReturnType();
1653  return true;
1654  }
1655  return false;
1656 }
1657 
1658 /// Give notes for a set of overloads.
1659 ///
1660 /// A companion to tryExprAsCall. In cases when the name that the programmer
1661 /// wrote was an overloaded function, we may be able to make some guesses about
1662 /// plausible overloads based on their return types; such guesses can be handed
1663 /// off to this method to be emitted as notes.
1664 ///
1665 /// \param Overloads - The overloads to note.
1666 /// \param FinalNoteLoc - If we've suppressed printing some overloads due to
1667 /// -fshow-overloads=best, this is the location to attach to the note about too
1668 /// many candidates. Typically this will be the location of the original
1669 /// ill-formed expression.
1670 static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads,
1671  const SourceLocation FinalNoteLoc) {
1672  int ShownOverloads = 0;
1673  int SuppressedOverloads = 0;
1674  for (UnresolvedSetImpl::iterator It = Overloads.begin(),
1675  DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
1676  // FIXME: Magic number for max shown overloads stolen from
1677  // OverloadCandidateSet::NoteCandidates.
1678  if (ShownOverloads >= 4 && S.Diags.getShowOverloads() == Ovl_Best) {
1679  ++SuppressedOverloads;
1680  continue;
1681  }
1682 
1683  NamedDecl *Fn = (*It)->getUnderlyingDecl();
1684  // Don't print overloads for non-default multiversioned functions.
1685  if (const auto *FD = Fn->getAsFunction()) {
1686  if (FD->isMultiVersion() &&
1687  !FD->getAttr<TargetAttr>()->isDefaultVersion())
1688  continue;
1689  }
1690  S.Diag(Fn->getLocation(), diag::note_possible_target_of_call);
1691  ++ShownOverloads;
1692  }
1693 
1694  if (SuppressedOverloads)
1695  S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates)
1696  << SuppressedOverloads;
1697 }
1698 
1700  const UnresolvedSetImpl &Overloads,
1701  bool (*IsPlausibleResult)(QualType)) {
1702  if (!IsPlausibleResult)
1703  return noteOverloads(S, Overloads, Loc);
1704 
1705  UnresolvedSet<2> PlausibleOverloads;
1706  for (OverloadExpr::decls_iterator It = Overloads.begin(),
1707  DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
1708  const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It);
1709  QualType OverloadResultTy = OverloadDecl->getReturnType();
1710  if (IsPlausibleResult(OverloadResultTy))
1711  PlausibleOverloads.addDecl(It.getDecl());
1712  }
1713  noteOverloads(S, PlausibleOverloads, Loc);
1714 }
1715 
1716 /// Determine whether the given expression can be called by just
1717 /// putting parentheses after it. Notably, expressions with unary
1718 /// operators can't be because the unary operator will start parsing
1719 /// outside the call.
1720 static bool IsCallableWithAppend(Expr *E) {
1721  E = E->IgnoreImplicit();
1722  return (!isa<CStyleCastExpr>(E) &&
1723  !isa<UnaryOperator>(E) &&
1724  !isa<BinaryOperator>(E) &&
1725  !isa<CXXOperatorCallExpr>(E));
1726 }
1727 
1729  bool ForceComplain,
1730  bool (*IsPlausibleResult)(QualType)) {
1731  SourceLocation Loc = E.get()->getExprLoc();
1732  SourceRange Range = E.get()->getSourceRange();
1733 
1734  QualType ZeroArgCallTy;
1735  UnresolvedSet<4> Overloads;
1736  if (tryExprAsCall(*E.get(), ZeroArgCallTy, Overloads) &&
1737  !ZeroArgCallTy.isNull() &&
1738  (!IsPlausibleResult || IsPlausibleResult(ZeroArgCallTy))) {
1739  // At this point, we know E is potentially callable with 0
1740  // arguments and that it returns something of a reasonable type,
1741  // so we can emit a fixit and carry on pretending that E was
1742  // actually a CallExpr.
1743  SourceLocation ParenInsertionLoc = getLocForEndOfToken(Range.getEnd());
1744  Diag(Loc, PD)
1745  << /*zero-arg*/ 1 << Range
1746  << (IsCallableWithAppend(E.get())
1747  ? FixItHint::CreateInsertion(ParenInsertionLoc, "()")
1748  : FixItHint());
1749  notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
1750 
1751  // FIXME: Try this before emitting the fixit, and suppress diagnostics
1752  // while doing so.
1753  E = ActOnCallExpr(nullptr, E.get(), Range.getEnd(), None,
1754  Range.getEnd().getLocWithOffset(1));
1755  return true;
1756  }
1757 
1758  if (!ForceComplain) return false;
1759 
1760  Diag(Loc, PD) << /*not zero-arg*/ 0 << Range;
1761  notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
1762  E = ExprError();
1763  return true;
1764 }
1765 
1767  if (!Ident_super)
1768  Ident_super = &Context.Idents.get("super");
1769  return Ident_super;
1770 }
1771 
1773  if (!Ident___float128)
1774  Ident___float128 = &Context.Idents.get("__float128");
1775  return Ident___float128;
1776 }
1777 
1779  CapturedRegionKind K) {
1781  getDiagnostics(), S, CD, RD, CD->getContextParam(), K,
1782  (getLangOpts().OpenMP && K == CR_OpenMP) ? getOpenMPNestingLevel() : 0);
1783  CSI->ReturnType = Context.VoidTy;
1784  FunctionScopes.push_back(CSI);
1785 }
1786 
1788  if (FunctionScopes.empty())
1789  return nullptr;
1790 
1791  return dyn_cast<CapturedRegionScopeInfo>(FunctionScopes.back());
1792 }
1793 
1794 const llvm::MapVector<FieldDecl *, Sema::DeleteLocs> &
1796  return DeleteExprs;
1797 }
1798 
1799 void Sema::setOpenCLExtensionForType(QualType T, llvm::StringRef ExtStr) {
1800  if (ExtStr.empty())
1801  return;
1803  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
1804  auto CanT = T.getCanonicalType().getTypePtr();
1805  for (auto &I : Exts)
1806  OpenCLTypeExtMap[CanT].insert(I.str());
1807 }
1808 
1809 void Sema::setOpenCLExtensionForDecl(Decl *FD, StringRef ExtStr) {
1811  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
1812  if (Exts.empty())
1813  return;
1814  for (auto &I : Exts)
1815  OpenCLDeclExtMap[FD].insert(I.str());
1816 }
1817 
1819  if (CurrOpenCLExtension.empty())
1820  return;
1821  setOpenCLExtensionForType(T, CurrOpenCLExtension);
1822 }
1823 
1825  if (CurrOpenCLExtension.empty())
1826  return;
1827  setOpenCLExtensionForDecl(D, CurrOpenCLExtension);
1828 }
1829 
1831  auto Loc = OpenCLDeclExtMap.find(FD);
1832  if (Loc == OpenCLDeclExtMap.end())
1833  return false;
1834  for (auto &I : Loc->second) {
1835  if (!getOpenCLOptions().isEnabled(I))
1836  return true;
1837  }
1838  return false;
1839 }
1840 
1841 template <typename T, typename DiagLocT, typename DiagInfoT, typename MapT>
1842 bool Sema::checkOpenCLDisabledTypeOrDecl(T D, DiagLocT DiagLoc,
1843  DiagInfoT DiagInfo, MapT &Map,
1844  unsigned Selector,
1845  SourceRange SrcRange) {
1846  auto Loc = Map.find(D);
1847  if (Loc == Map.end())
1848  return false;
1849  bool Disabled = false;
1850  for (auto &I : Loc->second) {
1851  if (I != CurrOpenCLExtension && !getOpenCLOptions().isEnabled(I)) {
1852  Diag(DiagLoc, diag::err_opencl_requires_extension) << Selector << DiagInfo
1853  << I << SrcRange;
1854  Disabled = true;
1855  }
1856  }
1857  return Disabled;
1858 }
1859 
1861  // Check extensions for declared types.
1862  Decl *Decl = nullptr;
1863  if (auto TypedefT = dyn_cast<TypedefType>(QT.getTypePtr()))
1864  Decl = TypedefT->getDecl();
1865  if (auto TagT = dyn_cast<TagType>(QT.getCanonicalType().getTypePtr()))
1866  Decl = TagT->getDecl();
1867  auto Loc = DS.getTypeSpecTypeLoc();
1868  if (checkOpenCLDisabledTypeOrDecl(Decl, Loc, QT, OpenCLDeclExtMap))
1869  return true;
1870 
1871  // Check extensions for builtin types.
1872  return checkOpenCLDisabledTypeOrDecl(QT.getCanonicalType().getTypePtr(), Loc,
1873  QT, OpenCLTypeExtMap);
1874 }
1875 
1877  IdentifierInfo *FnName = D.getIdentifier();
1878  return checkOpenCLDisabledTypeOrDecl(&D, E.getLocStart(), FnName,
1879  OpenCLDeclExtMap, 1, D.getSourceRange());
1880 }
RecordDecl * buildImplicitRecord(StringRef Name, RecordDecl::TagKind TK=TTK_Struct) const
Create a new implicit TU-level CXXRecordDecl or RecordDecl declaration.
VarTemplateDecl * getDescribedVarTemplate() const
Retrieves the variable template that is described by this variable declaration.
Definition: Decl.cpp:2426
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
const IncompleteArrayType * getAsIncompleteArrayType(QualType T) const
Definition: ASTContext.h:2357
Defines the clang::ASTContext interface.
ObjCInterfaceDecl * NSStringDecl
The declaration of the Objective-C NSString class.
Definition: Sema.h:851
UnusedFileScopedDeclsType UnusedFileScopedDecls
The set of file scoped decls seen so far that have not been used and must warn if not used...
Definition: Sema.h:596
Represents a function declaration or definition.
Definition: Decl.h:1714
llvm::SmallSetVector< const TypedefNameDecl *, 4 > UnusedLocalTypedefNameCandidates
Set containing all typedefs that are likely unused.
Definition: Sema.h:558
bool hasErrorOccurred() const
Definition: Diagnostic.h:746
bool hasBuiltinMSVaList() const
Returns whether or not type __builtin_ms_va_list type is available on this target.
Definition: TargetInfo.h:643
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
CanQualType OCLQueueTy
Definition: ASTContext.h:1035
Smart pointer class that efficiently represents Objective-C method names.
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
TypedefDecl * getCFConstantStringDecl() const
A (possibly-)qualified type.
Definition: Type.h:654
ASTConsumer & Consumer
Definition: Sema.h:319
LateTemplateParserCB * LateTemplateParser
Definition: Sema.h:630
void Initialize()
Perform initialization that occurs after the parser has been initialized but before it parses anythin...
Definition: Sema.cpp:186
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs...
Definition: ASTConsumer.h:34
DeclContext * getFunctionLevelDeclContext()
Definition: Sema.cpp:1174
RecordDecl * MSVCGuidDecl
The MSVC "_GUID" struct, which is defined in MSVC header files.
Definition: Sema.h:830
Ordinary name lookup, which finds ordinary names (functions, variables, typedefs, etc...
Definition: Sema.h:2993
A class which encapsulates the logic for delaying diagnostics during parsing and other processing...
Definition: Sema.h:653
void CheckCompleteVariableDeclaration(VarDecl *VD)
Definition: SemaDecl.cpp:11352
void getUndefinedButUsed(SmallVectorImpl< std::pair< NamedDecl *, SourceLocation > > &Undefined)
Obtain a sorted list of functions that are undefined but ODR-used.
Definition: Sema.cpp:620
submodule_iterator submodule_begin()
Definition: Module.h:556
QualType getPointerDiffType() const
Return the unique type for "ptrdiff_t" (C99 7.17) defined in <stddef.h>.
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3147
CXXFieldCollector - Used to keep track of CXXFieldDecls during parsing of C++ classes.
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:460
QualType ReturnType
ReturnType - The target type of return statements in this context, or null if unknown.
Definition: ScopeInfo.h:629
static void notePlausibleOverloads(Sema &S, SourceLocation Loc, const UnresolvedSetImpl &Overloads, bool(*IsPlausibleResult)(QualType))
Definition: Sema.cpp:1699
virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, SrcMgr::CharacteristicKind FileType, FileID PrevFID) override
Callback invoked whenever a source file is entered or exited.
Definition: Sema.cpp:86
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1270
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
Module * getCurrentModule()
Retrieves the module that we&#39;re currently building, if any.
ExprResult BuildCallToMemberFunction(Scope *S, Expr *MemExpr, SourceLocation LParenLoc, MultiExprArg Args, SourceLocation RParenLoc)
BuildCallToMemberFunction - Build a call to a member function.
VarDecl * getDefinition(ASTContext &)
Get the real (not just tentative) definition for this declaration.
Definition: Decl.cpp:2112
std::deque< PendingImplicitInstantiation > PendingInstantiations
The queue of implicit template instantiations that are required but have not yet been performed...
Definition: Sema.h:7599
ModuleLoader & getModuleLoader() const
Retrieve the module loader associated with the preprocessor.
Definition: Sema.cpp:50
Scope * TUScope
Translation Unit Scope - useful to Objective-C actions that need to lookup file scope declarations in...
Definition: Sema.h:805
The translation unit is a prefix to a translation unit, and is not complete.
Definition: LangOptions.h:307
SmallVector< CodeSynthesisContext, 16 > CodeSynthesisContexts
List of active code synthesis contexts.
Definition: Sema.h:7236
virtual void updateOutOfDateSelector(Selector Sel)
Load the contents of the global method pool for a given selector if necessary.
Definition: Sema.cpp:1544
virtual void ReadMethodPool(Selector Sel)
Load the contents of the global method pool for a given selector.
Definition: Sema.cpp:1543
CanQualType LongTy
Definition: ASTContext.h:1006
Any normal BCPL comments.
Declaration of a variable template.
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:46
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:672
A container of type source information.
Definition: Decl.h:86
Linkage getLinkage() const
Determine the linkage of this type.
Definition: Type.cpp:3562
bool getSuppressSystemWarnings() const
Definition: Diagnostic.h:625
IdentifierInfo * getSuperIdentifier() const
Definition: Sema.cpp:1766
The diagnostic should not be reported, but it should cause template argument deduction to fail...
void LoadExternalWeakUndeclaredIdentifiers()
Load weak undeclared identifiers from the external source.
Definition: Sema.cpp:719
QualType getAtomicType(QualType T) const
Return the uniqued reference to the atomic type for the specified type.
unsigned NonInstantiationEntries
The number of CodeSynthesisContexts that are not template instantiations and, therefore, should not be counted as part of the instantiation depth.
Definition: Sema.h:7277
bool resolveUses(Module *Mod, bool Complain)
Resolve all of the unresolved uses in the given module.
Definition: ModuleMap.cpp:1236
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3157
IdentifierInfo * getFloat128Identifier() const
Definition: Sema.cpp:1772
bool DisableTypoCorrection
Tracks whether we are in a context where typo correction is disabled.
Definition: Sema.h:7570
Retains information about a function, method, or block that is currently being parsed.
Definition: ScopeInfo.h:96
Compiling a C++ modules TS module interface unit.
Definition: LangOptions.h:77
Represents a variable declaration or definition.
Definition: Decl.h:812
QualType getReturnType() const
Definition: Decl.h:2262
DiagnosticsEngine & Diags
Definition: Sema.h:320
virtual void ReadWeakUndeclaredIdentifiers(SmallVectorImpl< std::pair< IdentifierInfo *, WeakInfo > > &WI)
Read the set of weak, undeclared identifiers known to the external Sema source.
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6455
PrintingPolicy getPrintingPolicy() const
Retrieve a suitable printing policy for diagnostics.
Definition: Sema.h:2118
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
NamedDecl * getUnderlyingDecl()
Looks through UsingDecls and ObjCCompatibleAliasDecls for the underlying named decl.
Definition: Decl.h:431
SmallVector< CXXRecordDecl *, 4 > DelayedDllExportClasses
Definition: Sema.h:10647
llvm::MapVector< NamedDecl *, SourceLocation > UndefinedButUsed
UndefinedInternals - all the used, undefined objects which require a definition in this translation u...
Definition: Sema.h:1097
Expr * IgnoreImplicit() LLVM_READONLY
IgnoreImplicit - Skip past any implicit AST nodes which might surround this expression.
Definition: Expr.h:741
CharacteristicKind
Indicates whether a file or directory holds normal user code, system code, or system code which is im...
Definition: SourceManager.h:78
ModuleMap & getModuleMap()
Retrieve the module map.
Definition: HeaderSearch.h:649
bool isInvalidDecl() const
Definition: DeclBase.h:547
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
ObjCMethodDecl * ValueWithBytesObjCTypeMethod
The declaration of the valueWithBytes:objCType: method.
Definition: Sema.h:860
This interface provides a way to observe the actions of the preprocessor as it does its thing...
Definition: PPCallbacks.h:36
OpenCLOptions & getOpenCLOptions()
Definition: Sema.h:1194
Defines the clang::Expr interface and subclasses for C++ expressions.
ObjCInterfaceDecl * NSDictionaryDecl
The declaration of the Objective-C NSDictionary class.
Definition: Sema.h:869
const llvm::MapVector< FieldDecl *, DeleteLocs > & getMismatchingDeleteExpressions() const
Retrieves list of suspicious delete-expressions that will be checked at the end of translation unit...
Definition: Sema.cpp:1795
iterator begin(Source *source, bool LocalOnly=false)
iterator begin(DeclarationName Name)
begin - Returns an iterator for decls with the name &#39;Name&#39;.
ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, MultiExprArg ArgExprs, SourceLocation RParenLoc, Expr *ExecConfig=nullptr, bool IsExecConfig=false)
ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
Definition: SemaExpr.cpp:5237
void threadSafetyCleanup(BeforeSet *Cache)
CanQualType OCLSamplerTy
Definition: ASTContext.h:1034
void CheckDelayedMemberExceptionSpecs()
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
Represents a struct/union/class.
Definition: Decl.h:3548
void FreeVisContext()
FreeVisContext - Deallocate and null out VisContext.
Definition: SemaAttr.cpp:732
An iterator over the friend declarations of a class.
Definition: DeclFriend.h:188
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
TypedefDecl * getObjCIdDecl() const
Retrieve the typedef corresponding to the predefined id type in Objective-C.
One of these records is kept for each identifier that is lexed.
std::unique_ptr< NSAPI > NSAPIObj
Caches identifiers/selectors for NSFoundation APIs.
Definition: Sema.h:833
LocalInstantiationScope * CurrentInstantiationScope
The current instantiation scope used to store local variables.
Definition: Sema.h:7566
virtual void ReadUnusedLocalTypedefNameCandidates(llvm::SmallSetVector< const TypedefNameDecl *, 4 > &Decls)
Read the set of potentially unused typedefs known to the source.
void enableSupportedCore(unsigned CLVer)
sema::FunctionScopeInfo * getEnclosingFunction() const
Definition: Sema.cpp:1469
bool resolveConflicts(Module *Mod, bool Complain)
Resolve all of the unresolved conflicts in the given module.
Definition: ModuleMap.cpp:1249
sema::LambdaScopeInfo * getCurGenericLambda()
Retrieve the current generic lambda info, if any.
Definition: Sema.cpp:1505
unsigned getCurrentDiagID() const
Definition: Diagnostic.h:988
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:150
bool inTemplateInstantiation() const
Determine whether we are currently performing template instantiation.
Definition: Sema.h:7470
SourceLocation getTypeSpecTypeLoc() const
Definition: DeclSpec.h:515
sema::BlockScopeInfo * getCurBlock()
Retrieve the current block, if any.
Definition: Sema.cpp:1454
void setCurrentOpenCLExtensionForType(QualType T)
Set current OpenCL extensions for a type which can only be used when these OpenCL extensions are enab...
Definition: Sema.cpp:1818
Represents a member of a struct/union/class.
Definition: Decl.h:2521
void erase(iterator From, iterator To)
The current expression is potentially evaluated at run time, which means that code may be generated t...
ImplicitParamDecl * getContextParam() const
Retrieve the parameter containing captured variables.
Definition: Decl.h:4080
threadSafety::BeforeSet * ThreadSafetyDeclCache
Definition: Sema.h:7585
ObjCInterfaceDecl * NSValueDecl
The declaration of the Objective-C NSValue class.
Definition: Sema.h:839
void ActOnEndOfTranslationUnit()
ActOnEndOfTranslationUnit - This is called at the very end of the translation unit when EOF is reache...
Definition: Sema.cpp:852
CanQualType OCLEventTy
Definition: ASTContext.h:1034
The iterator over UnresolvedSets.
Definition: UnresolvedSet.h:32
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:405
void setFunctionHasBranchIntoScope()
Definition: Sema.cpp:1439
Represents a C++ member access expression for which lookup produced a set of overloaded functions...
Definition: ExprCXX.h:3442
void setVisible(Module *M, SourceLocation Loc, VisibleCallback Vis=[](Module *) {}, ConflictCallback Cb=[](ArrayRef< Module *>, Module *, StringRef) {})
Make a specific module visible.
Definition: Module.cpp:566
void setPrintingPolicy(const clang::PrintingPolicy &Policy)
Definition: ASTContext.h:640
bool DefineUsedVTables()
Define all of the vtables that have been used in this translation unit and reference any virtual memb...
bool isOpenCLDisabledDecl(Decl *FD)
Definition: Sema.cpp:1830
CanQualType OCLReserveIDTy
Definition: ASTContext.h:1035
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:815
Describes a module or submodule.
Definition: Module.h:65
llvm::BumpPtrAllocator BumpAlloc
Definition: Sema.h:1074
IdentifierTable & Idents
Definition: ASTContext.h:538
static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads, const SourceLocation FinalNoteLoc)
Give notes for a set of overloads.
Definition: Sema.cpp:1670
bool AccessCheckingSFINAE
When true, access checking violations are treated as SFINAE failures rather than hard errors...
Definition: Sema.h:6053
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
Values of this type can be null.
iterator end()
end - Returns an iterator that has &#39;finished&#39;.
DiagnosticErrorTrap ErrorTrap
Used to determine if errors occurred in this function or block.
Definition: ScopeInfo.h:176
An abstract interface that should be implemented by clients that read ASTs and then require further s...
Definition: SemaConsumer.h:26
unsigned TyposCorrected
The number of typos corrected by CorrectTypo.
Definition: Sema.h:7573
VarDecl * getActingDefinition()
Get the tentative definition that acts as the real definition in a TU.
Definition: Decl.cpp:2095
static bool MethodsAndNestedClassesComplete(const CXXRecordDecl *RD, RecordCompleteMap &MNCComplete)
Returns true, if all methods and nested classes of the given CXXRecordDecl are defined in this transl...
Definition: Sema.cpp:737
bool findMacroSpelling(SourceLocation &loc, StringRef name)
Looks through the macro-expansion chain for the given location, looking for a macro expansion with th...
Definition: Sema.cpp:1323
Module * createGlobalModuleForInterfaceUnit(SourceLocation Loc)
Create a &#39;global module&#39; for a C++ Modules TS module interface unit.
Definition: ModuleMap.cpp:808
PtrTy get() const
Definition: Ownership.h:174
ObjCMethodDecl * getCurMethodDecl()
getCurMethodDecl - If inside of a method body, this returns a pointer to the method decl for the meth...
Definition: Sema.cpp:1199
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:422
HeaderSearch & getHeaderSearchInfo() const
Definition: Preprocessor.h:821
uint32_t Offset
Definition: CacheTokens.cpp:43
const SourceLocation & getLocation() const
Definition: Diagnostic.h:1326
bool checkOpenCLDisabledTypeDeclSpec(const DeclSpec &DS, QualType T)
Check if type T corresponding to declaration specifier DS is disabled due to required OpenCL extensio...
Definition: Sema.cpp:1860
TypedefDecl * getObjCSelDecl() const
Retrieve the typedef corresponding to the predefined &#39;SEL&#39; type in Objective-C.
ExprValueKind getValueKind() const
getValueKind - The value kind that this expression produces.
Definition: Expr.h:405
std::pair< SourceLocation, bool > DeleteExprLoc
Delete-expressions to be analyzed at the end of translation unit.
Definition: Sema.h:565
SourceLocation getExpansionLoc(SourceLocation Loc) const
Given a SourceLocation object Loc, return the expansion location referenced by the ID...
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:636
void PerformPendingInstantiations(bool LocalOnly=false)
Performs template instantiation for all implicit template instantiations we have seen until this poin...
A set of unresolved declarations.
Definition: UnresolvedSet.h:61
void IssueWarnings(Policy P, FunctionScopeInfo *fscope, const Decl *D, const BlockExpr *blkExpr)
void CheckDelegatingCtorCycles()
CheckedConversionKind
The kind of conversion being performed.
Definition: Sema.h:9300
friend_iterator friend_end() const
Definition: DeclFriend.h:244
~ExternalSemaSource() override
Definition: Sema.cpp:1541
Values of this type can never be null.
void addExternalSource(ExternalSemaSource *E)
Registers an external source.
Definition: Sema.cpp:403
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:5824
static const unsigned NumNSNumberLiteralMethods
Definition: NSAPI.h:187
submodule_iterator submodule_end()
Definition: Module.h:558
void PrintStats() const
Print out statistics about the semantic analysis.
Definition: Sema.cpp:420
void emitAndClearUnusedLocalTypedefWarnings()
Definition: Sema.cpp:810
SourceLocation getCurrentDiagLoc() const
Definition: Diagnostic.h:990
virtual ASTMutationListener * GetASTMutationListener()
If the consumer is interested in entities getting modified after their initial creation, it should return a pointer to an ASTMutationListener here.
Definition: ASTConsumer.h:124
Preprocessor & PP
Definition: Sema.h:317
ObjCInterfaceDecl * NSNumberDecl
The declaration of the Objective-C NSNumber class.
Definition: Sema.h:836
virtual void ReadKnownNamespaces(SmallVectorImpl< NamespaceDecl *> &Namespaces)
Load the set of namespaces that are known to the external source, which will be used during typo corr...
Definition: Sema.cpp:1546
const LangOptions & getLangOpts() const
Definition: Sema.h:1193
bool isTypeDependent() const
isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.
Definition: Expr.h:167
sema::AnalysisBasedWarnings AnalysisWarnings
Worker object for performing CFG-based warnings.
Definition: Sema.h:7584
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4015
NamespaceDecl * StdExperimentalNamespaceCache
The C++ "std::experimental" namespace, where the experimental parts of the standard library resides...
Definition: Sema.h:820
ObjCMethodDecl * StringWithUTF8StringMethod
The declaration of the stringWithUTF8String: method.
Definition: Sema.h:857
void DiagnoseNonDefaultPragmaPack(PragmaPackDiagnoseKind Kind, SourceLocation IncludeLoc)
Definition: SemaAttr.cpp:216
const LangOptions & LangOpts
Definition: Sema.h:316
bool checkOpenCLDisabledDecl(const NamedDecl &D, const Expr &E)
Check if declaration D used by expression E is disabled due to required OpenCL extensions being disab...
Definition: Sema.cpp:1876
Contains information about the compound statement currently being parsed.
Definition: ScopeInfo.h:66
bool EmitCurrentDiagnostic(bool Force=false)
Emit the current diagnostic and clear the diagnostic state.
Definition: Diagnostic.cpp:491
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1197
static bool IsCallableWithAppend(Expr *E)
Determine whether the given expression can be called by just putting parentheses after it...
Definition: Sema.cpp:1720
bool hasAttr() const
Definition: DeclBase.h:536
bool isExternalFormalLinkage(Linkage L)
Definition: Linkage.h:103
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:276
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3368
TentativeDefinitionsType TentativeDefinitions
All the tentative definitions encountered in the TU.
Definition: Sema.h:588
Retains information about a captured region.
Definition: ScopeInfo.h:716
void PushCompoundScope(bool IsStmtExpr)
Definition: Sema.cpp:1422
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
CastKind
CastKind - The kind of operation required for a conversion.
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1719
void PopCompoundScope()
Definition: Sema.cpp:1426
TypedefDecl * getBuiltinMSVaListDecl() const
Retrieve the C type declaration corresponding to the predefined __builtin_ms_va_list type...
virtual void ReadMismatchingDeleteExpressions(llvm::MapVector< FieldDecl *, llvm::SmallVector< std::pair< SourceLocation, bool >, 4 >> &)
Definition: Sema.cpp:1553
void setFunctionHasBranchProtectedScope()
Definition: Sema.cpp:1444
bool isEnabled(llvm::StringRef Ext) const
Definition: OpenCLOptions.h:39
Scope * getCurScope() const
Retrieve the parser&#39;s current scope.
Definition: Sema.h:10612
CommentOptions CommentOpts
Options for parsing comments.
Definition: LangOptions.h:192
SmallVector< PendingImplicitInstantiation, 1 > LateParsedInstantiations
Queue of implicit template instantiations that cannot be performed eagerly.
Definition: Sema.h:7603
Retains information about a block that is currently being parsed.
Definition: ScopeInfo.h:690
bool isCodeCompletionEnabled() const
Determine if we are performing code completion.
Any normal C comment.
An abstract interface that should be implemented by external AST sources that also provide informatio...
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3838
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:636
static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D)
Used to prune the decls of Sema&#39;s UnusedFileScopedDecls vector.
Definition: Sema.cpp:540
Expr - This represents one expression.
Definition: Expr.h:106
void setOpenCLExtensionForDecl(Decl *FD, llvm::StringRef Exts)
Set OpenCL extensions for a declaration which can only be used when these OpenCL extensions are enabl...
Definition: Sema.cpp:1809
Show just the "best" overload candidates.
static SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset, const SourceManager &SM, const LangOptions &LangOpts)
Computes the source location just past the end of the token at this source location.
Definition: Lexer.cpp:771
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:107
bool isAlmostTrailingComment() const LLVM_READONLY
Returns true if it is a probable typo:
int Id
Definition: ASTDiff.cpp:191
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
llvm::SmallPtrSet< const Decl *, 4 > ParsingInitForAutoVars
ParsingInitForAutoVars - a set of declarations with auto types for which we are currently parsing the...
Definition: Sema.h:578
const FunctionProtoType * T
static FindResult find(Expr *E)
Finds the overloaded expression in the given expression E of OverloadTy.
Definition: ExprCXX.h:2615
TypedefDecl * buildImplicitTypedef(QualType T, StringRef Name) const
Create a new implicit TU-level typedef declaration.
void addImplicitTypedef(StringRef Name, QualType T)
Definition: Sema.cpp:180
BlockExpr - Adaptor class for mixing a BlockDecl with expressions.
Definition: Expr.h:4890
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
bool InNonInstantiationSFINAEContext
Whether we are in a SFINAE context that is not associated with template instantiation.
Definition: Sema.h:7268
Defines the clang::Preprocessor interface.
bool isNullPtrType() const
Definition: Type.h:6294
llvm::MapVector< IdentifierInfo *, WeakInfo > WeakUndeclaredIdentifiers
WeakUndeclaredIdentifiers - Identifiers contained in #pragma weak before declared.
Definition: Sema.h:781
Defines the classes clang::DelayedDiagnostic and clang::AccessedEntity.
DeclContext * getDeclContext()
Definition: DeclBase.h:426
void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP=nullptr, const Decl *D=nullptr, const BlockExpr *blkExpr=nullptr)
Definition: Sema.cpp:1402
bool resolveExports(Module *Mod, bool Complain)
Resolve all of the unresolved exports in the given module.
Definition: ModuleMap.cpp:1223
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
TypedefDecl * getInt128Decl() const
Retrieve the declaration for the 128-bit signed integer type.
ScalarTypeKind getScalarTypeKind() const
Given that this is a scalar type, classify it.
Definition: Type.cpp:1930
decls_iterator decls_begin() const
Definition: ExprCXX.h:2643
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7506
int Depth
Definition: ASTDiff.cpp:191
const MacroInfo * getMacroInfo(const IdentifierInfo *II) const
Definition: Preprocessor.h:985
QualType getType() const
Definition: Expr.h:128
void Clear()
Clear out the current diagnostic.
Definition: Diagnostic.h:880
SmallVector< sema::FunctionScopeInfo *, 4 > FunctionScopes
Stack containing information about each of the nested function, block, and method scopes that are cur...
Definition: Sema.h:537
PartialDiagnostic::StorageAllocator & getDiagAllocator()
Definition: ASTContext.h:668
QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, ArrayType::ArraySizeModifier ASM, unsigned IndexTypeQuals) const
Return the unique reference to the type for a constant array of the specified element type...
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1341
bool isExternallyVisible(Linkage L)
Definition: Linkage.h:86
bool isInvalid() const
Definition: Ownership.h:170
SourceLocation getEnd() const
Preprocessor & getPreprocessor() const
Definition: Sema.h:1199
TypedefDecl * getBuiltinVaListDecl() const
Retrieve the C type declaration corresponding to the predefined __builtin_va_list type...
ObjCMethodDecl * ArrayWithObjectsMethod
The declaration of the arrayWithObjects:count: method.
Definition: Sema.h:866
void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext=true)
Add this decl to the scope shadowed decl chains.
Definition: SemaDecl.cpp:1342
bool isUsable() const
Definition: Ownership.h:171
sema::LambdaScopeInfo * PushLambdaScope()
Definition: Sema.cpp:1387
NamedDecl * LookupSingleName(Scope *S, DeclarationName Name, SourceLocation Loc, LookupNameKind NameKind, RedeclarationKind Redecl=NotForRedeclaration)
Look up a name, looking for a single declaration.
void DiagnoseUnterminatedPragmaPack()
Definition: SemaAttr.cpp:250
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:719
const SourceManager & SM
Definition: Format.cpp:1468
OverloadsShown getShowOverloads() const
Definition: Diagnostic.h:659
unsigned NumSFINAEErrors
The number of SFINAE diagnostics that have been trapped.
Definition: Sema.h:1077
llvm::DenseMap< const CXXRecordDecl *, bool > RecordCompleteMap
Definition: Sema.cpp:730
An abstract interface that should be implemented by external AST sources that also provide informatio...
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:5883
void addAttr(Attr *A)
Definition: DeclBase.h:485
unsigned Bool
Whether we can use &#39;bool&#39; rather than &#39;_Bool&#39; (even if the language doesn&#39;t actually have &#39;bool&#39;...
void PushBlockScope(Scope *BlockScope, BlockDecl *Block)
Definition: Sema.cpp:1382
CanQualType OverloadTy
Definition: ASTContext.h:1026
This declaration has an owning module, but is globally visible (typically because its owning module i...
void Emit(const DiagnosticBuilder &DB) const
#define false
Definition: stdbool.h:33
RecordDecl * CXXTypeInfoDecl
The C++ "type_info" declaration, which is defined in <typeinfo>.
Definition: Sema.h:827
Kind
A reference to an overloaded function set, either an UnresolvedLookupExpr or an UnresolvedMemberExpr...
Definition: ExprCXX.h:2551
QualType getCanonicalType() const
Definition: Type.h:5863
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
Encodes a location in the source.
TypedefDecl * getUInt128Decl() const
Retrieve the declaration for the 128-bit unsigned integer type.
QualType getReturnType() const
Definition: Type.h:3301
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
void setCurrentOpenCLExtensionForDecl(Decl *FD)
Set current OpenCL extensions for a declaration which can only be used when these OpenCL extensions a...
Definition: Sema.cpp:1824
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:789
QualType getUIntPtrType() const
Return a type compatible with "uintptr_t" (C99 7.18.1.4), as defined by the target.
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1332
bool makeUnavailableInSystemHeader(SourceLocation loc, UnavailableAttr::ImplicitReason reason)
makeUnavailableInSystemHeader - There is an error in the current context.
Definition: Sema.cpp:373
ObjCInterfaceDecl * getObjCProtocolDecl() const
Retrieve the Objective-C class declaration corresponding to the predefined Protocol class...
bool isExternalWithNoLinkageType(ValueDecl *VD)
Determine if VD, which must be a variable or function, is an external symbol that nonetheless can&#39;t b...
Definition: Sema.cpp:609
ClassTemplateDecl * StdInitializerList
The C++ "std::initializer_list" template, which is defined in <initializer_list>. ...
Definition: Sema.h:824
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2031
void DiagnoseUseOfUnimplementedSelectors()
CanQualType FloatTy
Definition: ASTContext.h:1009
CanQualType VoidTy
Definition: ASTContext.h:997
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:89
bool isInMainFile(SourceLocation Loc) const
Returns whether the PresumedLoc for a given SourceLocation is in the main file.
void SetArgToStringFn(ArgToStringFnTy Fn, void *Cookie)
Definition: Diagnostic.h:791
virtual void ReadUndefinedButUsed(llvm::MapVector< NamedDecl *, SourceLocation > &Undefined)
Load the set of used but not defined functions or variables with internal linkage, or used but not defined internal functions.
Definition: Sema.cpp:1550
void EmitCurrentDiagnostic(unsigned DiagID)
Cause the active diagnostic on the DiagosticsEngine to be emitted.
Definition: Sema.cpp:1213
This declaration is only a declaration.
Definition: Decl.h:1144
void addSupport(const OpenCLOptions &Opts)
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:2861
The diagnostic should be suppressed entirely.
static bool IsRecordFullyDefined(const CXXRecordDecl *RD, RecordCompleteMap &RecordsComplete, RecordCompleteMap &MNCComplete)
Returns true, if the given CXXRecordDecl is fully defined in this translation unit, i.e.
Definition: Sema.cpp:779
friend_iterator friend_begin() const
Definition: DeclFriend.h:240
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
std::unique_ptr< CXXFieldCollector > FieldCollector
FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
Definition: Sema.h:549
static bool isFunctionOrVarDeclExternC(NamedDecl *ND)
Definition: Sema.cpp:601
sema::CapturedRegionScopeInfo * getCurCapturedRegion()
Retrieve the current captured region, if any.
Definition: Sema.cpp:1787
static bool isBuiltinNote(unsigned DiagID)
Determine whether the given built-in diagnostic ID is a Note.
void ActOnStartOfTranslationUnit()
This is called before the very first declaration in the translation unit is parsed.
Definition: Sema.cpp:826
ASTConsumer & getASTConsumer() const
Definition: Sema.h:1201
void setLastDiagnosticIgnored(bool Ignored=true)
Pretend that the last diagnostic issued was ignored, so any subsequent notes will be suppressed...
Definition: Diagnostic.h:667
void setOpenCLExtensionForType(QualType T, llvm::StringRef Exts)
Set OpenCL extensions for a type which can only be used when these OpenCL extensions are enabled...
Definition: Sema.cpp:1799
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1543
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2858
Abstract interface for a consumer of code-completion information.
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Dataflow Directional Tag Classes.
LateTemplateParserCleanupCB * LateTemplateParserCleanup
Definition: Sema.h:631
bool isValid() const
Return true if this is a valid SourceLocation object.
int ArgumentPackSubstitutionIndex
The current index into pack expansion arguments that will be used for substitution of parameter packs...
Definition: Sema.h:7301
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
ObjCMethodDecl * NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]
The Objective-C NSNumber methods used to create NSNumber literals.
Definition: Sema.h:848
ASTMutationListener * getASTMutationListener() const
Definition: Sema.cpp:394
ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, ExprValueKind VK=VK_RValue, const CXXCastPath *BasePath=nullptr, CheckedConversionKind CCK=CCK_ImplicitConversion)
ImpCastExprToType - If Expr is not of type &#39;Type&#39;, insert an implicit cast.
Definition: Sema.cpp:470
void diagnoseZeroToNullptrConversion(CastKind Kind, const Expr *E)
Warn when implicitly casting 0 to nullptr.
Definition: Sema.cpp:442
void RecordParsingTemplateParameterDepth(unsigned Depth)
This is used to inform Sema what the current TemplateParameterDepth is during Parsing.
Definition: Sema.cpp:1393
bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const
Definition: SemaDecl.cpp:1555
SourceLocation getIncludeLoc(FileID FID) const
Returns the include location if FID is a #include&#39;d file otherwise it returns an invalid location...
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:77
FileID getMainFileID() const
Returns the FileID of the main source file.
bool GlobalNewDeleteDeclared
A flag to remember whether the implicit forms of operator new and delete have been declared...
Definition: Sema.h:882
DeclarationName - The name of a declaration.
bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, bool ForceComplain=false, bool(*IsPlausibleResult)(QualType)=nullptr)
Try to recover by turning the given expression into a call.
Definition: Sema.cpp:1728
A set of unresolved declarations.
bool hasUnrecoverableErrorOccurred() const
Determine whether any unrecoverable errors have occurred since this object instance was created...
Definition: Diagnostic.h:1015
IdentifierResolver IdResolver
Definition: Sema.h:800
Optional< sema::TemplateDeductionInfo * > isSFINAEContext() const
Determines whether we are currently in a context where template argument substitution failures are no...
bool IsHeaderFile
Indicates whether the front-end is explicitly told that the input is a header file (i...
Definition: LangOptions.h:207
static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy)
ScalarTypeToBooleanCastKind - Returns the cast kind corresponding to the conversion from scalar type ...
Definition: Sema.cpp:524
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1061
Abstract interface for a module loader.
Definition: ModuleLoader.h:74
NamedDecl * getCurFunctionOrMethodDecl()
getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method or C function we&#39;re in...
Definition: Sema.cpp:1206
bool hasAnyUnrecoverableErrorsInThisFunction() const
Determine whether any errors occurred within this function/method/ block.
Definition: Sema.cpp:1435
Expr * IgnoreParenImpCasts() LLVM_READONLY
IgnoreParenImpCasts - Ignore parentheses and implicit casts.
Definition: Expr.cpp:2557
llvm::MapVector< FieldDecl *, DeleteLocs > DeleteExprs
Definition: Sema.h:567
void DiagnoseUnterminatedPragmaAttribute()
Definition: SemaAttr.cpp:675
Encapsulates the data about a macro definition (e.g.
Definition: MacroInfo.h:40
FileID getFileID(SourceLocation SpellingLoc) const
Return the FileID for a SourceLocation.
DeclarationName VAListTagName
VAListTagName - The declaration name corresponding to __va_list_tag.
Definition: Sema.h:338
void FormatASTNodeDiagnosticArgument(DiagnosticsEngine::ArgumentKind Kind, intptr_t Val, StringRef Modifier, StringRef Argument, ArrayRef< DiagnosticsEngine::ArgumentValue > PrevArgs, SmallVectorImpl< char > &Output, void *Cookie, ArrayRef< intptr_t > QualTypeVals)
DiagnosticsEngine argument formatting function for diagnostics that involve AST nodes.
CanQualType UnsignedLongTy
Definition: ASTContext.h:1007
FunctionDecl * getCurFunctionDecl()
getCurFunctionDecl - If inside of a function body, this returns a pointer to the function decl for th...
Definition: Sema.cpp:1194
void * OpaqueParser
Definition: Sema.h:632
MaterializeTemporaryExpr * CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary, bool BoundToLvalueReference)
Definition: SemaInit.cpp:6540
CanQualType BoundMemberTy
Definition: ASTContext.h:1026
SmallVector< ExpressionEvaluationContextRecord, 8 > ExprEvalContexts
A stack of expression evaluation contexts.
Definition: Sema.h:1006
void addComment(const RawComment &RC)
Definition: ASTContext.h:785
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:92
ObjCInterfaceDecl * NSArrayDecl
The declaration of the Objective-C NSArray class.
Definition: Sema.h:863
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
Optional< NullabilityKind > getNullability(const ASTContext &context) const
Determine the nullability of the given type.
Definition: Type.cpp:3668
The "class" keyword.
Definition: Type.h:4793
virtual bool hasInt128Type() const
Determine whether the __int128 type is supported on this target.
Definition: TargetInfo.h:398
std::unique_ptr< sema::FunctionScopeInfo > PreallocatedFunctionScope
Definition: Sema.h:533
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2037
This is a scope that can contain a declaration.
Definition: Scope.h:59
SourceManager & getSourceManager()
Definition: ASTContext.h:644
The type-property cache.
Definition: Type.cpp:3421
void ActOnTranslationUnitScope(Scope *S)
Definition: Sema.cpp:69
Scope * getScopeForContext(DeclContext *Ctx)
Determines the active Scope associated with the given declaration context.
Definition: Sema.cpp:1351
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2204
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:990
void setSuppressAllDiagnostics(bool Val=true)
Suppress all diagnostics, to silence the front end when we know that we don&#39;t want any more diagnosti...
Definition: Diagnostic.h:632
void * VisContext
VisContext - Manages the stack for #pragma GCC visibility.
Definition: Sema.h:490
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
sema::DelayedDiagnosticPool * getCurrentPool() const
Returns the current delayed-diagnostics pool.
Definition: Sema.h:668
static SFINAEResponse getDiagnosticSFINAEResponse(unsigned DiagID)
Determines whether the given built-in diagnostic ID is for an error that is suppressed if it occurs d...
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
CommentKind getKind() const LLVM_READONLY
void setFunctionHasIndirectGoto()
Definition: Sema.cpp:1449
Represents a C array with an unspecified size.
Definition: Type.h:2763
sema::FunctionScopeInfo * getCurFunction() const
Definition: Sema.h:1320
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:330
bool isRValue() const
Definition: Expr.h:250
TranslationUnitKind
Describes the kind of translation unit being processed.
Definition: LangOptions.h:301
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:129
TypedefDecl * getObjCClassDecl() const
Retrieve the typedef declaration corresponding to the predefined Objective-C &#39;Class&#39; type...
SourceManager & getSourceManager() const
Definition: Sema.h:1198
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:266
bool tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy, UnresolvedSetImpl &NonTemplateOverloads)
Figure out if an expression could be turned into a call.
Definition: Sema.cpp:1567
A little helper class (which is basically a smart pointer that forwards info from DiagnosticsEngine) ...
Definition: Diagnostic.h:1315
TranslationUnitKind TUKind
The kind of translation unit we are processing.
Definition: Sema.h:1072
Defines the clang::TargetInfo interface.
bool isIncrementalProcessingEnabled() const
Returns true if incremental processing is enabled.
ExprResult ExprError()
Definition: Ownership.h:283
The diagnostic should be reported.
CanQualType IntTy
Definition: ASTContext.h:1006
void ActOnComment(SourceRange Comment)
Definition: Sema.cpp:1514
virtual void ReadPendingInstantiations(SmallVectorImpl< std::pair< ValueDecl *, SourceLocation > > &Pending)
Read the set of pending instantiations known to the external Sema source.
decl_type * getMostRecentDecl()
Returns the most recent (re)declaration of this declaration.
Definition: Redeclarable.h:230
The diagnostic is an access-control diagnostic, which will be substitution failures in some contexts ...
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:972
QualType getIntPtrType() const
Return a type compatible with "intptr_t" (C99 7.18.1.4), as defined by the target.
bool isIgnored(unsigned DiagID, SourceLocation Loc) const
Determine whether the diagnostic is known to be ignored.
Definition: Diagnostic.h:818
bool isUnion() const
Definition: Decl.h:3225
NamedDecl * getMostRecentDecl()
Definition: Decl.h:445
bool isDeleted() const
Whether this function has been deleted.
Definition: Decl.h:2123
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1120
SourceManager & SourceMgr
Definition: Sema.h:321
CapturedRegionKind
The different kinds of captured statement.
Definition: CapturedStmt.h:17
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:66
bool isInSystemMacro(SourceLocation loc) const
Returns whether Loc is expanded from a macro in a system header.
SmallVector< CompoundScopeInfo, 4 > CompoundScopes
The stack of currently active compound stamement scopes in the function.
Definition: ScopeInfo.h:199
QualType getType() const
Definition: Decl.h:647
virtual void CompleteTentativeDefinition(VarDecl *D)
CompleteTentativeDefinition - Callback invoked at the end of a translation unit to notify the consume...
Definition: ASTConsumer.h:104
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:318
void diagnoseNullableToNonnullConversion(QualType DstType, QualType SrcType, SourceLocation Loc)
Warn if we&#39;re implicitly casting from a _Nullable pointer type to a _Nonnull one. ...
Definition: Sema.cpp:428
This represents a decl that may have a name.
Definition: Decl.h:248
void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD, RecordDecl *RD, CapturedRegionKind K)
Definition: Sema.cpp:1778
sema::LambdaScopeInfo * getCurLambda(bool IgnoreNonLambdaCapturingScope=false)
Retrieve the current lambda scope info, if any.
Definition: Sema.cpp:1481
CanQualType DoubleTy
Definition: ASTContext.h:1009
SmallVector< std::pair< const CXXMethodDecl *, const CXXMethodDecl * >, 2 > DelayedExceptionSpecChecks
All the overriding functions seen during a class definition that had their exception spec checks dela...
Definition: Sema.h:610
IdentifierInfo * getBoolName() const
Retrieve the identifier &#39;bool&#39;.
Definition: ASTContext.h:1683
SourceLocation getLocStart() const LLVM_READONLY
Definition: Stmt.cpp:278
void setType(QualType newType)
Definition: Decl.h:648
SourceLocation getBegin() const
const LangOptions & getLangOpts() const
Definition: ASTContext.h:689
static void checkUndefinedButUsed(Sema &S)
checkUndefinedButUsed - Check for undefined objects with internal linkage or that are inline...
Definition: Sema.cpp:669
decls_iterator decls_end() const
Definition: ExprCXX.h:2644
SmallVector< std::pair< CXXMethodDecl *, const FunctionProtoType * >, 2 > DelayedDefaultedMemberExceptionSpecs
All the members seen during a class definition which were both explicitly defaulted and had explicitl...
Definition: Sema.h:620
void addPPCallbacks(std::unique_ptr< PPCallbacks > C)
Definition: Preprocessor.h:912
This class handles loading and caching of source files into memory.
void PrintContextStack()
Definition: Sema.h:7474
OpenCLOptions & getSupportedOpenCLOpts()
Get supported OpenCL extensions and optional core features.
Definition: TargetInfo.h:1134
bool getSuppressAllDiagnostics() const
Definition: Diagnostic.h:635
Declaration of a template function.
Definition: DeclTemplate.h:968
void PushFunctionScope()
Enter a new function scope.
Definition: Sema.cpp:1370
NamedDeclSetType UnusedPrivateFields
Set containing all declared private fields that are not used.
Definition: Sema.h:554
SourceLocation getLocation() const
Definition: DeclBase.h:417
bool isExternallyVisible() const
Definition: Decl.h:379
CanQualType OCLClkEventTy
Definition: ASTContext.h:1034
ObjCMethodDecl * DictionaryWithObjectsMethod
The declaration of the dictionaryWithObjects:forKeys:count: method.
Definition: Sema.h:872
Helper class that creates diagnostics with optional template instantiation stacks.
Definition: Sema.h:1223
Expr * IgnoreParens() LLVM_READONLY
IgnoreParens - Ignore parentheses.
Definition: Expr.cpp:2439
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:127
This is a C++ Modules TS module interface unit.
Definition: Module.h:79
CanQualType UnsignedIntTy
Definition: ASTContext.h:1007
decl_iterator decls_end() const
Definition: DeclBase.h:1588
bool hasExternalFormalLinkage() const
True if this decl has external linkage.
Definition: Decl.h:375
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
static bool isExternC(const NamedDecl *ND)
Definition: Mangle.cpp:60
The translation unit is a module.
Definition: LangOptions.h:310