1 //===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the Sema class, which performs semantic analysis and
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_SEMA_SEMA_H
16 #define LLVM_CLANG_SEMA_SEMA_H
18 #include "clang/Sema/Ownership.h"
19 #include "clang/Sema/AnalysisBasedWarnings.h"
20 #include "clang/Sema/IdentifierResolver.h"
21 #include "clang/Sema/ObjCMethodList.h"
22 #include "clang/Sema/DeclSpec.h"
23 #include "clang/Sema/ExternalSemaSource.h"
24 #include "clang/Sema/LocInfoType.h"
25 #include "clang/Sema/TypoCorrection.h"
26 #include "clang/Sema/Weak.h"
27 #include "clang/AST/Expr.h"
28 #include "clang/AST/ExprObjC.h"
29 #include "clang/AST/DeclarationName.h"
30 #include "clang/AST/ExternalASTSource.h"
31 #include "clang/AST/LambdaMangleContext.h"
32 #include "clang/AST/TypeLoc.h"
33 #include "clang/AST/NSAPI.h"
34 #include "clang/Lex/ModuleLoader.h"
35 #include "clang/Basic/Specifiers.h"
36 #include "clang/Basic/TemplateKinds.h"
37 #include "clang/Basic/TypeTraits.h"
38 #include "clang/Basic/ExpressionTraits.h"
39 #include "llvm/ADT/ArrayRef.h"
40 #include "llvm/ADT/Optional.h"
41 #include "llvm/ADT/OwningPtr.h"
42 #include "llvm/ADT/SetVector.h"
43 #include "llvm/ADT/SmallPtrSet.h"
44 #include "llvm/ADT/SmallVector.h"
50 template <typename ValueT> struct DenseMapInfo;
51 template <typename ValueT, typename ValueInfoT> class DenseSet;
59 class ASTMutationListener;
67 class CXXBindTemporaryExpr;
68 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
69 class CXXConstructorDecl;
70 class CXXConversionDecl;
71 class CXXDestructorDecl;
72 class CXXFieldCollector;
73 class CXXMemberCallExpr;
79 class ClassTemplateDecl;
80 class ClassTemplatePartialSpecializationDecl;
81 class ClassTemplateSpecializationDecl;
82 class CodeCompleteConsumer;
83 class CodeCompletionAllocator;
84 class CodeCompletionTUInfo;
85 class CodeCompletionResult;
91 class DeducedTemplateArgument;
92 class DependentDiagnostic;
93 class DesignatedInitExpr;
95 class EnumConstantDecl;
98 class ExternalSemaSource;
102 class FunctionProtoType;
103 class FunctionTemplateDecl;
104 class ImplicitConversionSequence;
106 class InitializationKind;
107 class InitializationSequence;
108 class InitializedEntity;
109 class IntegerLiteral;
113 class LocalInstantiationScope;
116 class MultiLevelTemplateArgumentList;
119 class ObjCCategoryDecl;
120 class ObjCCategoryImplDecl;
121 class ObjCCompatibleAliasDecl;
122 class ObjCContainerDecl;
124 class ObjCImplementationDecl;
125 class ObjCInterfaceDecl;
127 template <class T> class ObjCList;
128 class ObjCMessageExpr;
129 class ObjCMethodDecl;
130 class ObjCPropertyDecl;
131 class ObjCProtocolDecl;
132 class OverloadCandidateSet;
137 class PseudoDestructorTypeStorage;
138 class PseudoObjectExpr;
140 class StandardConversionSequence;
144 class TargetAttributesSema;
145 class TemplateArgument;
146 class TemplateArgumentList;
147 class TemplateArgumentLoc;
149 class TemplateParameterList;
150 class TemplatePartialOrderingContext;
151 class TemplateTemplateParmDecl;
155 class TypedefNameDecl;
158 class UnresolvedLookupExpr;
159 class UnresolvedMemberExpr;
160 class UnresolvedSetImpl;
161 class UnresolvedSetIterator;
163 class UsingShadowDecl;
166 class VisibilityAttr;
167 class VisibleDeclConsumer;
168 class IndirectFieldDecl;
171 class AccessedEntity;
172 class BlockScopeInfo;
173 class CapturingScopeInfo;
174 class CompoundScopeInfo;
175 class DelayedDiagnostic;
176 class DelayedDiagnosticPool;
177 class FunctionScopeInfo;
178 class LambdaScopeInfo;
179 class PossiblyUnreachableDiag;
180 class TemplateDeductionInfo;
183 // FIXME: No way to easily map from TemplateTypeParmTypes to
184 // TemplateTypeParmDecls, so we have this horrible PointerUnion.
185 typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>,
186 SourceLocation> UnexpandedParameterPack;
188 /// Sema - This implements semantic analysis and AST building for C.
190 Sema(const Sema &) LLVM_DELETED_FUNCTION;
191 void operator=(const Sema &) LLVM_DELETED_FUNCTION;
192 mutable const TargetAttributesSema* TheTargetAttributesSema;
194 ///\brief Source of additional semantic information.
195 ExternalSemaSource *ExternalSource;
197 ///\brief Whether Sema has generated a multiplexer and has to delete it.
198 bool isMultiplexExternalSource;
201 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
202 typedef OpaquePtr<TemplateName> TemplateTy;
203 typedef OpaquePtr<QualType> TypeTy;
205 OpenCLOptions OpenCLFeatures;
206 FPOptions FPFeatures;
208 const LangOptions &LangOpts;
211 ASTConsumer &Consumer;
212 DiagnosticsEngine &Diags;
213 SourceManager &SourceMgr;
215 /// \brief Flag indicating whether or not to collect detailed statistics.
218 /// \brief Code-completion consumer.
219 CodeCompleteConsumer *CodeCompleter;
221 /// CurContext - This is the current declaration context of parsing.
222 DeclContext *CurContext;
224 /// \brief Generally null except when we temporarily switch decl contexts,
225 /// like in \see ActOnObjCTemporaryExitContainerContext.
226 DeclContext *OriginalLexicalContext;
228 /// VAListTagName - The declaration name corresponding to __va_list_tag.
229 /// This is used as part of a hack to omit that class from ADL results.
230 DeclarationName VAListTagName;
232 /// PackContext - Manages the stack for \#pragma pack. An alignment
233 /// of 0 indicates default alignment.
234 void *PackContext; // Really a "PragmaPackStack*"
236 bool MSStructPragmaOn; // True when \#pragma ms_struct on
238 /// VisContext - Manages the stack for \#pragma GCC visibility.
239 void *VisContext; // Really a "PragmaVisStack*"
241 /// \brief Flag indicating if Sema is building a recovery call expression.
243 /// This flag is used to avoid building recovery call expressions
244 /// if Sema is already doing so, which would cause infinite recursions.
245 bool IsBuildingRecoveryCallExpr;
247 /// ExprNeedsCleanups - True if the current evaluation context
248 /// requires cleanups to be run at its conclusion.
249 bool ExprNeedsCleanups;
251 /// ExprCleanupObjects - This is the stack of objects requiring
252 /// cleanup that are created by the current full expression. The
253 /// element type here is ExprWithCleanups::Object.
254 SmallVector<BlockDecl*, 8> ExprCleanupObjects;
256 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs;
258 /// \brief Stack containing information about each of the nested
259 /// function, block, and method scopes that are currently active.
261 /// This array is never empty. Clients should ignore the first
262 /// element, which is used to cache a single FunctionScopeInfo
263 /// that's used to parse every top-level function.
264 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes;
266 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource,
267 &ExternalSemaSource::ReadExtVectorDecls, 2, 2>
270 /// ExtVectorDecls - This is a list all the extended vector types. This allows
271 /// us to associate a raw vector type with one of the ext_vector type names.
272 /// This is only necessary for issuing pretty diagnostics.
273 ExtVectorDeclsType ExtVectorDecls;
275 /// \brief The set of types for which we have already complained about the
276 /// definitions being hidden.
278 /// This set is used to suppress redundant diagnostics.
279 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions;
281 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
282 OwningPtr<CXXFieldCollector> FieldCollector;
284 typedef llvm::SmallSetVector<const NamedDecl*, 16> NamedDeclSetType;
286 /// \brief Set containing all declared private fields that are not used.
287 NamedDeclSetType UnusedPrivateFields;
289 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy;
291 /// PureVirtualClassDiagSet - a set of class declarations which we have
292 /// emitted a list of pure virtual functions. Used to prevent emitting the
293 /// same list more than once.
294 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet;
296 /// ParsingInitForAutoVars - a set of declarations with auto types for which
297 /// we are currently parsing the initializer.
298 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars;
300 /// \brief A mapping from external names to the most recent
301 /// locally-scoped external declaration with that name.
303 /// This map contains external declarations introduced in local
308 /// void foo(int, int);
312 /// Here, the name "foo" will be associated with the declaration on
313 /// "foo" within f. This name is not visible outside of
314 /// "f". However, we still find it in two cases:
316 /// - If we are declaring another external with the name "foo", we
317 /// can find "foo" as a previous declaration, so that the types
318 /// of this external declaration can be checked for
321 /// - If we would implicitly declare "foo" (e.g., due to a call to
322 /// "foo" in C when no prototype or definition is visible), then
323 /// we find this declaration of "foo" and complain that it is
325 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls;
327 /// \brief Look for a locally scoped external declaration by the given name.
328 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator
329 findLocallyScopedExternalDecl(DeclarationName Name);
331 typedef LazyVector<VarDecl *, ExternalSemaSource,
332 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2>
333 TentativeDefinitionsType;
335 /// \brief All the tentative definitions encountered in the TU.
336 TentativeDefinitionsType TentativeDefinitions;
338 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource,
339 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2>
340 UnusedFileScopedDeclsType;
342 /// \brief The set of file scoped decls seen so far that have not been used
343 /// and must warn if not used. Only contains the first declaration.
344 UnusedFileScopedDeclsType UnusedFileScopedDecls;
346 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource,
347 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2>
348 DelegatingCtorDeclsType;
350 /// \brief All the delegating constructors seen so far in the file, used for
351 /// cycle detection at the end of the TU.
352 DelegatingCtorDeclsType DelegatingCtorDecls;
354 /// \brief All the destructors seen during a class definition that had their
355 /// exception spec computation delayed because it depended on an unparsed
357 SmallVector<CXXDestructorDecl*, 2> DelayedDestructorExceptionSpecs;
359 /// \brief All the overriding destructors seen during a class definition
360 /// (there could be multiple due to nested classes) that had their exception
361 /// spec checks delayed, plus the overridden destructor.
362 SmallVector<std::pair<const CXXDestructorDecl*,
363 const CXXDestructorDecl*>, 2>
364 DelayedDestructorExceptionSpecChecks;
366 /// \brief Callback to the parser to parse templated functions when needed.
367 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD);
368 LateTemplateParserCB *LateTemplateParser;
371 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) {
372 LateTemplateParser = LTP;
376 class DelayedDiagnostics;
378 class DelayedDiagnosticsState {
379 sema::DelayedDiagnosticPool *SavedPool;
380 friend class Sema::DelayedDiagnostics;
382 typedef DelayedDiagnosticsState ParsingDeclState;
383 typedef DelayedDiagnosticsState ProcessingContextState;
385 /// A class which encapsulates the logic for delaying diagnostics
386 /// during parsing and other processing.
387 class DelayedDiagnostics {
388 /// \brief The current pool of diagnostics into which delayed
389 /// diagnostics should go.
390 sema::DelayedDiagnosticPool *CurPool;
393 DelayedDiagnostics() : CurPool(0) {}
395 /// Adds a delayed diagnostic.
396 void add(const sema::DelayedDiagnostic &diag); // in DelayedDiagnostic.h
398 /// Determines whether diagnostics should be delayed.
399 bool shouldDelayDiagnostics() { return CurPool != 0; }
401 /// Returns the current delayed-diagnostics pool.
402 sema::DelayedDiagnosticPool *getCurrentPool() const {
406 /// Enter a new scope. Access and deprecation diagnostics will be
407 /// collected in this pool.
408 DelayedDiagnosticsState push(sema::DelayedDiagnosticPool &pool) {
409 DelayedDiagnosticsState state;
410 state.SavedPool = CurPool;
415 /// Leave a delayed-diagnostic state that was previously pushed.
416 /// Do not emit any of the diagnostics. This is performed as part
417 /// of the bookkeeping of popping a pool "properly".
418 void popWithoutEmitting(DelayedDiagnosticsState state) {
419 CurPool = state.SavedPool;
422 /// Enter a new scope where access and deprecation diagnostics are
424 DelayedDiagnosticsState pushUndelayed() {
425 DelayedDiagnosticsState state;
426 state.SavedPool = CurPool;
431 /// Undo a previous pushUndelayed().
432 void popUndelayed(DelayedDiagnosticsState state) {
433 assert(CurPool == NULL);
434 CurPool = state.SavedPool;
436 } DelayedDiagnostics;
438 /// A RAII object to temporarily push a declaration context.
442 DeclContext *SavedContext;
443 ProcessingContextState SavedContextState;
444 QualType SavedCXXThisTypeOverride;
447 ContextRAII(Sema &S, DeclContext *ContextToPush)
448 : S(S), SavedContext(S.CurContext),
449 SavedContextState(S.DelayedDiagnostics.pushUndelayed()),
450 SavedCXXThisTypeOverride(S.CXXThisTypeOverride)
452 assert(ContextToPush && "pushing null context");
453 S.CurContext = ContextToPush;
457 if (!SavedContext) return;
458 S.CurContext = SavedContext;
459 S.DelayedDiagnostics.popUndelayed(SavedContextState);
460 S.CXXThisTypeOverride = SavedCXXThisTypeOverride;
469 /// \brief RAII object to handle the state changes required to synthesize
471 class SynthesizedFunctionScope {
473 Sema::ContextRAII SavedContext;
476 SynthesizedFunctionScope(Sema &S, DeclContext *DC)
477 : S(S), SavedContext(S, DC)
479 S.PushFunctionScope();
480 S.PushExpressionEvaluationContext(Sema::PotentiallyEvaluated);
483 ~SynthesizedFunctionScope() {
484 S.PopExpressionEvaluationContext();
485 S.PopFunctionScopeInfo();
489 /// WeakUndeclaredIdentifiers - Identifiers contained in
490 /// \#pragma weak before declared. rare. may alias another
491 /// identifier, declared or undeclared
492 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers;
494 /// ExtnameUndeclaredIdentifiers - Identifiers contained in
495 /// \#pragma redefine_extname before declared. Used in Solaris system headers
496 /// to define functions that occur in multiple standards to call the version
497 /// in the currently selected standard.
498 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers;
501 /// \brief Load weak undeclared identifiers from the external source.
502 void LoadExternalWeakUndeclaredIdentifiers();
504 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by
505 /// \#pragma weak during processing of other Decls.
506 /// I couldn't figure out a clean way to generate these in-line, so
507 /// we store them here and handle separately -- which is a hack.
508 /// It would be best to refactor this.
509 SmallVector<Decl*,2> WeakTopLevelDecl;
511 IdentifierResolver IdResolver;
513 /// Translation Unit Scope - useful to Objective-C actions that need
514 /// to lookup file scope declarations in the "ordinary" C decl namespace.
515 /// For example, user-defined classes, built-in "id" type, etc.
518 /// \brief The C++ "std" namespace, where the standard library resides.
519 LazyDeclPtr StdNamespace;
521 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++
522 /// standard library.
523 LazyDeclPtr StdBadAlloc;
525 /// \brief The C++ "std::initializer_list" template, which is defined in
526 /// \<initializer_list>.
527 ClassTemplateDecl *StdInitializerList;
529 /// \brief The C++ "type_info" declaration, which is defined in \<typeinfo>.
530 RecordDecl *CXXTypeInfoDecl;
532 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files.
533 RecordDecl *MSVCGuidDecl;
535 /// \brief Caches identifiers/selectors for NSFoundation APIs.
536 llvm::OwningPtr<NSAPI> NSAPIObj;
538 /// \brief The declaration of the Objective-C NSNumber class.
539 ObjCInterfaceDecl *NSNumberDecl;
541 /// \brief Pointer to NSNumber type (NSNumber *).
542 QualType NSNumberPointer;
544 /// \brief The Objective-C NSNumber methods used to create NSNumber literals.
545 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods];
547 /// \brief The declaration of the Objective-C NSString class.
548 ObjCInterfaceDecl *NSStringDecl;
550 /// \brief Pointer to NSString type (NSString *).
551 QualType NSStringPointer;
553 /// \brief The declaration of the stringWithUTF8String: method.
554 ObjCMethodDecl *StringWithUTF8StringMethod;
556 /// \brief The declaration of the Objective-C NSArray class.
557 ObjCInterfaceDecl *NSArrayDecl;
559 /// \brief The declaration of the arrayWithObjects:count: method.
560 ObjCMethodDecl *ArrayWithObjectsMethod;
562 /// \brief The declaration of the Objective-C NSDictionary class.
563 ObjCInterfaceDecl *NSDictionaryDecl;
565 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method.
566 ObjCMethodDecl *DictionaryWithObjectsMethod;
568 /// \brief id<NSCopying> type.
569 QualType QIDNSCopying;
571 /// A flag to remember whether the implicit forms of operator new and delete
572 /// have been declared.
573 bool GlobalNewDeleteDeclared;
575 /// \brief Describes how the expressions currently being parsed are
576 /// evaluated at run-time, if at all.
577 enum ExpressionEvaluationContext {
578 /// \brief The current expression and its subexpressions occur within an
579 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of
580 /// \c sizeof, where the type of the expression may be significant but
581 /// no code will be generated to evaluate the value of the expression at
585 /// \brief The current context is "potentially evaluated" in C++11 terms,
586 /// but the expression is evaluated at compile-time (like the values of
587 /// cases in a switch statment).
590 /// \brief The current expression is potentially evaluated at run time,
591 /// which means that code may be generated to evaluate the value of the
592 /// expression at run time.
593 PotentiallyEvaluated,
595 /// \brief The current expression is potentially evaluated, but any
596 /// declarations referenced inside that expression are only used if
597 /// in fact the current expression is used.
599 /// This value is used when parsing default function arguments, for which
600 /// we would like to provide diagnostics (e.g., passing non-POD arguments
601 /// through varargs) but do not want to mark declarations as "referenced"
602 /// until the default argument is used.
603 PotentiallyEvaluatedIfUsed
606 /// \brief Data structure used to record current or nested
607 /// expression evaluation contexts.
608 struct ExpressionEvaluationContextRecord {
609 /// \brief The expression evaluation context.
610 ExpressionEvaluationContext Context;
612 /// \brief Whether the enclosing context needed a cleanup.
613 bool ParentNeedsCleanups;
615 /// \brief Whether we are in a decltype expression.
618 /// \brief The number of active cleanup objects when we entered
619 /// this expression evaluation context.
620 unsigned NumCleanupObjects;
622 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs;
624 /// \brief The lambdas that are present within this context, if it
625 /// is indeed an unevaluated context.
626 llvm::SmallVector<LambdaExpr *, 2> Lambdas;
628 /// \brief The declaration that provides context for the lambda expression
629 /// if the normal declaration context does not suffice, e.g., in a
630 /// default function argument.
631 Decl *LambdaContextDecl;
633 /// \brief The context information used to mangle lambda expressions
634 /// within this context.
636 /// This mangling information is allocated lazily, since most contexts
637 /// do not have lambda expressions.
638 LambdaMangleContext *LambdaMangle;
640 /// \brief If we are processing a decltype type, a set of call expressions
641 /// for which we have deferred checking the completeness of the return type.
642 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls;
644 /// \brief If we are processing a decltype type, a set of temporary binding
645 /// expressions for which we have deferred checking the destructor.
646 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds;
648 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
649 unsigned NumCleanupObjects,
650 bool ParentNeedsCleanups,
651 Decl *LambdaContextDecl,
653 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups),
654 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
655 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { }
657 ~ExpressionEvaluationContextRecord() {
661 /// \brief Retrieve the mangling context for lambdas.
662 LambdaMangleContext &getLambdaMangleContext() {
663 assert(LambdaContextDecl && "Need to have a lambda context declaration");
665 LambdaMangle = new LambdaMangleContext;
666 return *LambdaMangle;
670 /// A stack of expression evaluation contexts.
671 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts;
673 /// SpecialMemberOverloadResult - The overloading result for a special member
676 /// This is basically a wrapper around PointerIntPair. The lowest bits of the
677 /// integer are used to determine whether overload resolution succeeded.
678 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode {
687 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair;
690 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID)
691 : FastFoldingSetNode(ID)
694 CXXMethodDecl *getMethod() const { return Pair.getPointer(); }
695 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); }
697 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); }
698 void setKind(Kind K) { Pair.setInt(K); }
701 /// \brief A cache of special member function overload resolution results
703 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache;
705 /// \brief The kind of translation unit we are processing.
707 /// When we're processing a complete translation unit, Sema will perform
708 /// end-of-translation-unit semantic tasks (such as creating
709 /// initializers for tentative definitions in C) once parsing has
710 /// completed. Modules and precompiled headers perform different kinds of
712 TranslationUnitKind TUKind;
714 llvm::BumpPtrAllocator BumpAlloc;
716 /// \brief The number of SFINAE diagnostics that have been trapped.
717 unsigned NumSFINAEErrors;
719 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> >
720 UnparsedDefaultArgInstantiationsMap;
722 /// \brief A mapping from parameters with unparsed default arguments to the
723 /// set of instantiations of each parameter.
725 /// This mapping is a temporary data structure used when parsing
726 /// nested class templates or nested classes of class templates,
727 /// where we might end up instantiating an inner class before the
728 /// default arguments of its methods have been parsed.
729 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations;
731 // Contains the locations of the beginning of unparsed default
732 // argument locations.
733 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs;
735 /// UndefinedInternals - all the used, undefined objects with
736 /// internal linkage in this translation unit.
737 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals;
739 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
740 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
742 /// Method Pool - allows efficient lookup when typechecking messages to "id".
743 /// We need to maintain a list, since selectors can have differing signatures
744 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1%
745 /// of selectors are "overloaded").
746 GlobalMethodPool MethodPool;
748 /// Method selectors used in a \@selector expression. Used for implementation
750 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors;
752 void ReadMethodPool(Selector Sel);
754 /// Private Helper predicate to check for 'self'.
755 bool isSelfExpr(Expr *RExpr);
757 /// \brief Cause the active diagnostic on the DiagosticsEngine to be
758 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and
759 /// should not be used elsewhere.
760 void EmitCurrentDiagnostic(unsigned DiagID);
762 /// Records and restores the FP_CONTRACT state on entry/exit of compound
764 class FPContractStateRAII {
766 FPContractStateRAII(Sema& S)
767 : S(S), OldFPContractState(S.FPFeatures.fp_contract) {}
768 ~FPContractStateRAII() {
769 S.FPFeatures.fp_contract = OldFPContractState;
773 bool OldFPContractState : 1;
777 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
778 TranslationUnitKind TUKind = TU_Complete,
779 CodeCompleteConsumer *CompletionConsumer = 0);
782 /// \brief Perform initialization that occurs after the parser has been
783 /// initialized but before it parses anything.
786 const LangOptions &getLangOpts() const { return LangOpts; }
787 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; }
788 FPOptions &getFPOptions() { return FPFeatures; }
790 DiagnosticsEngine &getDiagnostics() const { return Diags; }
791 SourceManager &getSourceManager() const { return SourceMgr; }
792 const TargetAttributesSema &getTargetAttributesSema() const;
793 Preprocessor &getPreprocessor() const { return PP; }
794 ASTContext &getASTContext() const { return Context; }
795 ASTConsumer &getASTConsumer() const { return Consumer; }
796 ASTMutationListener *getASTMutationListener() const;
797 ExternalSemaSource* getExternalSource() const { return ExternalSource; }
799 ///\brief Registers an external source. If an external source already exists,
800 /// creates a multiplex external source and appends to it.
802 ///\param[in] E - A non-null external sema source.
804 void addExternalSource(ExternalSemaSource *E);
806 void PrintStats() const;
808 /// \brief Helper class that creates diagnostics with optional
809 /// template instantiation stacks.
811 /// This class provides a wrapper around the basic DiagnosticBuilder
812 /// class that emits diagnostics. SemaDiagnosticBuilder is
813 /// responsible for emitting the diagnostic (as DiagnosticBuilder
814 /// does) and, if the diagnostic comes from inside a template
815 /// instantiation, printing the template instantiation stack as
817 class SemaDiagnosticBuilder : public DiagnosticBuilder {
822 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID)
823 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { }
825 ~SemaDiagnosticBuilder() {
826 // If we aren't active, there is nothing to do.
827 if (!isActive()) return;
829 // Otherwise, we need to emit the diagnostic. First flush the underlying
830 // DiagnosticBuilder data, and clear the diagnostic builder itself so it
831 // won't emit the diagnostic in its own destructor.
833 // This seems wasteful, in that as written the DiagnosticBuilder dtor will
834 // do its own needless checks to see if the diagnostic needs to be
835 // emitted. However, because we take care to ensure that the builder
836 // objects never escape, a sufficiently smart compiler will be able to
837 // eliminate that code.
841 // Dispatch to Sema to emit the diagnostic.
842 SemaRef.EmitCurrentDiagnostic(DiagID);
846 /// \brief Emit a diagnostic.
847 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
848 DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
849 return SemaDiagnosticBuilder(DB, *this, DiagID);
852 /// \brief Emit a partial diagnostic.
853 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD);
855 /// \brief Build a partial diagnostic.
856 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h
858 bool findMacroSpelling(SourceLocation &loc, StringRef name);
860 /// \brief Get a string to suggest for zero-initialization of a type.
861 std::string getFixItZeroInitializerForType(QualType T) const;
862 std::string getFixItZeroLiteralForType(QualType T) const;
864 ExprResult Owned(Expr* E) { return E; }
865 ExprResult Owned(ExprResult R) { return R; }
866 StmtResult Owned(Stmt* S) { return S; }
868 void ActOnEndOfTranslationUnit();
870 void CheckDelegatingCtorCycles();
872 Scope *getScopeForContext(DeclContext *Ctx);
874 void PushFunctionScope();
875 void PushBlockScope(Scope *BlockScope, BlockDecl *Block);
876 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator);
877 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0,
878 const Decl *D = 0, const BlockExpr *blkExpr = 0);
880 sema::FunctionScopeInfo *getCurFunction() const {
881 return FunctionScopes.back();
884 void PushCompoundScope();
885 void PopCompoundScope();
887 sema::CompoundScopeInfo &getCurCompoundScope() const;
889 bool hasAnyUnrecoverableErrorsInThisFunction() const;
891 /// \brief Retrieve the current block, if any.
892 sema::BlockScopeInfo *getCurBlock();
894 /// \brief Retrieve the current lambda expression, if any.
895 sema::LambdaScopeInfo *getCurLambda();
897 /// WeakTopLevelDeclDecls - access to \#pragma weak-generated Decls
898 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; }
900 void ActOnComment(SourceRange Comment);
902 //===--------------------------------------------------------------------===//
903 // Type Analysis / Processing: SemaType.cpp.
906 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs);
907 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) {
908 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR));
910 QualType BuildPointerType(QualType T,
911 SourceLocation Loc, DeclarationName Entity);
912 QualType BuildReferenceType(QualType T, bool LValueRef,
913 SourceLocation Loc, DeclarationName Entity);
914 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
915 Expr *ArraySize, unsigned Quals,
916 SourceRange Brackets, DeclarationName Entity);
917 QualType BuildExtVectorType(QualType T, Expr *ArraySize,
918 SourceLocation AttrLoc);
919 QualType BuildFunctionType(QualType T,
920 QualType *ParamTypes, unsigned NumParamTypes,
921 bool Variadic, bool HasTrailingReturn,
922 unsigned Quals, RefQualifierKind RefQualifier,
923 SourceLocation Loc, DeclarationName Entity,
924 FunctionType::ExtInfo Info);
925 QualType BuildMemberPointerType(QualType T, QualType Class,
927 DeclarationName Entity);
928 QualType BuildBlockPointerType(QualType T,
929 SourceLocation Loc, DeclarationName Entity);
930 QualType BuildParenType(QualType T);
931 QualType BuildAtomicType(QualType T, SourceLocation Loc);
933 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S);
934 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy);
935 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
936 TypeSourceInfo *ReturnTypeInfo);
938 /// \brief Package the given type and TSI into a ParsedType.
939 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo);
940 DeclarationNameInfo GetNameForDeclarator(Declarator &D);
941 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name);
942 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0);
943 CanThrowResult canThrow(const Expr *E);
944 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
945 const FunctionProtoType *FPT);
946 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range);
947 bool CheckDistantExceptionSpec(QualType T);
948 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
949 bool CheckEquivalentExceptionSpec(
950 const FunctionProtoType *Old, SourceLocation OldLoc,
951 const FunctionProtoType *New, SourceLocation NewLoc);
952 bool CheckEquivalentExceptionSpec(
953 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
954 const FunctionProtoType *Old, SourceLocation OldLoc,
955 const FunctionProtoType *New, SourceLocation NewLoc,
956 bool *MissingExceptionSpecification = 0,
957 bool *MissingEmptyExceptionSpecification = 0,
958 bool AllowNoexceptAllMatchWithNoSpec = false,
959 bool IsOperatorNew = false);
960 bool CheckExceptionSpecSubset(
961 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
962 const FunctionProtoType *Superset, SourceLocation SuperLoc,
963 const FunctionProtoType *Subset, SourceLocation SubLoc);
964 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID,
965 const FunctionProtoType *Target, SourceLocation TargetLoc,
966 const FunctionProtoType *Source, SourceLocation SourceLoc);
968 TypeResult ActOnTypeName(Scope *S, Declarator &D);
970 /// \brief The parser has parsed the context-sensitive type 'instancetype'
971 /// in an Objective-C message declaration. Return the appropriate type.
972 ParsedType ActOnObjCInstanceType(SourceLocation Loc);
974 /// \brief Abstract class used to diagnose incomplete types.
975 struct TypeDiagnoser {
978 TypeDiagnoser(bool Suppressed = false) : Suppressed(Suppressed) { }
980 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0;
981 virtual ~TypeDiagnoser() {}
984 static int getPrintable(int I) { return I; }
985 static unsigned getPrintable(unsigned I) { return I; }
986 static bool getPrintable(bool B) { return B; }
987 static const char * getPrintable(const char *S) { return S; }
988 static StringRef getPrintable(StringRef S) { return S; }
989 static const std::string &getPrintable(const std::string &S) { return S; }
990 static const IdentifierInfo *getPrintable(const IdentifierInfo *II) {
993 static DeclarationName getPrintable(DeclarationName N) { return N; }
994 static QualType getPrintable(QualType T) { return T; }
995 static SourceRange getPrintable(SourceRange R) { return R; }
996 static SourceRange getPrintable(SourceLocation L) { return L; }
997 static SourceRange getPrintable(Expr *E) { return E->getSourceRange(); }
998 static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();}
1000 template<typename T1>
1001 class BoundTypeDiagnoser1 : public TypeDiagnoser {
1006 BoundTypeDiagnoser1(unsigned DiagID, const T1 &Arg1)
1007 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1) { }
1008 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) {
1009 if (Suppressed) return;
1010 S.Diag(Loc, DiagID) << getPrintable(Arg1) << T;
1013 virtual ~BoundTypeDiagnoser1() { }
1016 template<typename T1, typename T2>
1017 class BoundTypeDiagnoser2 : public TypeDiagnoser {
1023 BoundTypeDiagnoser2(unsigned DiagID, const T1 &Arg1,
1025 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1),
1028 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) {
1029 if (Suppressed) return;
1030 S.Diag(Loc, DiagID) << getPrintable(Arg1) << getPrintable(Arg2) << T;
1033 virtual ~BoundTypeDiagnoser2() { }
1036 template<typename T1, typename T2, typename T3>
1037 class BoundTypeDiagnoser3 : public TypeDiagnoser {
1044 BoundTypeDiagnoser3(unsigned DiagID, const T1 &Arg1,
1045 const T2 &Arg2, const T3 &Arg3)
1046 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1),
1047 Arg2(Arg2), Arg3(Arg3) { }
1049 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) {
1050 if (Suppressed) return;
1052 << getPrintable(Arg1) << getPrintable(Arg2) << getPrintable(Arg3) << T;
1055 virtual ~BoundTypeDiagnoser3() { }
1058 bool RequireCompleteType(SourceLocation Loc, QualType T,
1059 TypeDiagnoser &Diagnoser);
1060 bool RequireCompleteType(SourceLocation Loc, QualType T,
1063 template<typename T1>
1064 bool RequireCompleteType(SourceLocation Loc, QualType T,
1065 unsigned DiagID, const T1 &Arg1) {
1066 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1);
1067 return RequireCompleteType(Loc, T, Diagnoser);
1070 template<typename T1, typename T2>
1071 bool RequireCompleteType(SourceLocation Loc, QualType T,
1072 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) {
1073 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2);
1074 return RequireCompleteType(Loc, T, Diagnoser);
1077 template<typename T1, typename T2, typename T3>
1078 bool RequireCompleteType(SourceLocation Loc, QualType T,
1079 unsigned DiagID, const T1 &Arg1, const T2 &Arg2,
1081 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2,
1083 return RequireCompleteType(Loc, T, Diagnoser);
1086 bool RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser);
1087 bool RequireCompleteExprType(Expr *E, unsigned DiagID);
1089 template<typename T1>
1090 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1) {
1091 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1);
1092 return RequireCompleteExprType(E, Diagnoser);
1095 template<typename T1, typename T2>
1096 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1,
1098 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2);
1099 return RequireCompleteExprType(E, Diagnoser);
1102 template<typename T1, typename T2, typename T3>
1103 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1,
1104 const T2 &Arg2, const T3 &Arg3) {
1105 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2,
1107 return RequireCompleteExprType(E, Diagnoser);
1110 bool RequireLiteralType(SourceLocation Loc, QualType T,
1111 TypeDiagnoser &Diagnoser);
1112 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID);
1114 template<typename T1>
1115 bool RequireLiteralType(SourceLocation Loc, QualType T,
1116 unsigned DiagID, const T1 &Arg1) {
1117 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1);
1118 return RequireLiteralType(Loc, T, Diagnoser);
1121 template<typename T1, typename T2>
1122 bool RequireLiteralType(SourceLocation Loc, QualType T,
1123 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) {
1124 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2);
1125 return RequireLiteralType(Loc, T, Diagnoser);
1128 template<typename T1, typename T2, typename T3>
1129 bool RequireLiteralType(SourceLocation Loc, QualType T,
1130 unsigned DiagID, const T1 &Arg1, const T2 &Arg2,
1132 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2,
1134 return RequireLiteralType(Loc, T, Diagnoser);
1137 QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
1138 const CXXScopeSpec &SS, QualType T);
1140 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc);
1141 QualType BuildDecltypeType(Expr *E, SourceLocation Loc);
1142 QualType BuildUnaryTransformType(QualType BaseType,
1143 UnaryTransformType::UTTKind UKind,
1144 SourceLocation Loc);
1146 //===--------------------------------------------------------------------===//
1147 // Symbol table / Decl tracking callbacks: SemaDecl.cpp.
1150 /// List of decls defined in a function prototype. This contains EnumConstants
1151 /// that incorrectly end up in translation unit scope because there is no
1152 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches
1153 /// them into the FunctionDecl.
1154 std::vector<NamedDecl*> DeclsInPrototypeScope;
1155 /// Nonzero if we are currently parsing a function declarator. This is a counter
1156 /// as opposed to a boolean so we can deal with nested function declarators
1158 /// void f(void (*g)(), ...)
1159 unsigned InFunctionDeclarator;
1161 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0);
1163 void DiagnoseUseOfUnimplementedSelectors();
1165 bool isSimpleTypeSpecifier(tok::TokenKind Kind) const;
1167 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc,
1168 Scope *S, CXXScopeSpec *SS = 0,
1169 bool isClassName = false,
1170 bool HasTrailingDot = false,
1171 ParsedType ObjectType = ParsedType(),
1172 bool IsCtorOrDtorName = false,
1173 bool WantNontrivialTypeSourceInfo = false,
1174 IdentifierInfo **CorrectedII = 0);
1175 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S);
1176 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S);
1177 bool DiagnoseUnknownTypeName(IdentifierInfo *&II,
1178 SourceLocation IILoc,
1181 ParsedType &SuggestedType);
1183 /// \brief Describes the result of the name lookup and resolution performed
1184 /// by \c ClassifyName().
1185 enum NameClassificationKind {
1191 NC_NestedNameSpecifier,
1196 class NameClassification {
1197 NameClassificationKind Kind;
1199 TemplateName Template;
1201 const IdentifierInfo *Keyword;
1203 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {}
1206 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {}
1208 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {}
1210 NameClassification(const IdentifierInfo *Keyword)
1211 : Kind(NC_Keyword), Keyword(Keyword) { }
1213 static NameClassification Error() {
1214 return NameClassification(NC_Error);
1217 static NameClassification Unknown() {
1218 return NameClassification(NC_Unknown);
1221 static NameClassification NestedNameSpecifier() {
1222 return NameClassification(NC_NestedNameSpecifier);
1225 static NameClassification TypeTemplate(TemplateName Name) {
1226 NameClassification Result(NC_TypeTemplate);
1227 Result.Template = Name;
1231 static NameClassification FunctionTemplate(TemplateName Name) {
1232 NameClassification Result(NC_FunctionTemplate);
1233 Result.Template = Name;
1237 NameClassificationKind getKind() const { return Kind; }
1239 ParsedType getType() const {
1240 assert(Kind == NC_Type);
1244 ExprResult getExpression() const {
1245 assert(Kind == NC_Expression);
1249 TemplateName getTemplateName() const {
1250 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1254 TemplateNameKind getTemplateNameKind() const {
1255 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1256 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template;
1260 /// \brief Perform name lookup on the given name, classifying it based on
1261 /// the results of name lookup and the following token.
1263 /// This routine is used by the parser to resolve identifiers and help direct
1264 /// parsing. When the identifier cannot be found, this routine will attempt
1265 /// to correct the typo and classify based on the resulting name.
1267 /// \param S The scope in which we're performing name lookup.
1269 /// \param SS The nested-name-specifier that precedes the name.
1271 /// \param Name The identifier. If typo correction finds an alternative name,
1272 /// this pointer parameter will be updated accordingly.
1274 /// \param NameLoc The location of the identifier.
1276 /// \param NextToken The token following the identifier. Used to help
1277 /// disambiguate the name.
1279 /// \param IsAddressOfOperand True if this name is the operand of a unary
1280 /// address of ('&') expression, assuming it is classified as an
1283 /// \param CCC The correction callback, if typo correction is desired.
1284 NameClassification ClassifyName(Scope *S,
1286 IdentifierInfo *&Name,
1287 SourceLocation NameLoc,
1288 const Token &NextToken,
1289 bool IsAddressOfOperand,
1290 CorrectionCandidateCallback *CCC = 0);
1292 Decl *ActOnDeclarator(Scope *S, Declarator &D);
1294 Decl *HandleDeclarator(Scope *S, Declarator &D,
1295 MultiTemplateParamsArg TemplateParameterLists);
1296 void RegisterLocallyScopedExternCDecl(NamedDecl *ND,
1297 const LookupResult &Previous,
1299 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info);
1300 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
1301 DeclarationName Name,
1302 SourceLocation Loc);
1303 void DiagnoseFunctionSpecifiers(Declarator& D);
1304 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R);
1305 void CheckShadow(Scope *S, VarDecl *D);
1306 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
1307 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D);
1308 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1309 TypeSourceInfo *TInfo,
1310 LookupResult &Previous);
1311 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D,
1312 LookupResult &Previous, bool &Redeclaration);
1313 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1314 TypeSourceInfo *TInfo,
1315 LookupResult &Previous,
1316 MultiTemplateParamsArg TemplateParamLists);
1317 // Returns true if the variable declaration is a redeclaration
1318 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
1319 void CheckCompleteVariableDeclaration(VarDecl *var);
1320 void ActOnStartFunctionDeclarator();
1321 void ActOnEndFunctionDeclarator();
1322 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1323 TypeSourceInfo *TInfo,
1324 LookupResult &Previous,
1325 MultiTemplateParamsArg TemplateParamLists,
1327 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1328 void checkVoidParamDecl(ParmVarDecl *Param);
1330 bool CheckConstexprFunctionDecl(const FunctionDecl *FD);
1331 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body);
1333 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1334 // Returns true if the function declaration is a redeclaration
1335 bool CheckFunctionDeclaration(Scope *S,
1336 FunctionDecl *NewFD, LookupResult &Previous,
1337 bool IsExplicitSpecialization);
1338 void CheckMain(FunctionDecl *FD, const DeclSpec &D);
1339 Decl *ActOnParamDeclarator(Scope *S, Declarator &D);
1340 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC,
1343 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
1344 SourceLocation NameLoc, IdentifierInfo *Name,
1345 QualType T, TypeSourceInfo *TSInfo,
1346 StorageClass SC, StorageClass SCAsWritten);
1347 void ActOnParamDefaultArgument(Decl *param,
1348 SourceLocation EqualLoc,
1350 void ActOnParamUnparsedDefaultArgument(Decl *param,
1351 SourceLocation EqualLoc,
1352 SourceLocation ArgLoc);
1353 void ActOnParamDefaultArgumentError(Decl *param);
1354 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg,
1355 SourceLocation EqualLoc);
1357 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit,
1358 bool TypeMayContainAuto);
1359 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto);
1360 void ActOnInitializerError(Decl *Dcl);
1361 void ActOnCXXForRangeDecl(Decl *D);
1362 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc);
1363 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc);
1364 void FinalizeDeclaration(Decl *D);
1365 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS,
1368 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls,
1369 bool TypeMayContainAuto = true);
1371 /// Should be called on all declarations that might have attached
1372 /// documentation comments.
1373 void ActOnDocumentableDecl(Decl *D);
1374 void ActOnDocumentableDecls(Decl **Group, unsigned NumDecls);
1376 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
1377 SourceLocation LocAfterDecls);
1378 void CheckForFunctionRedefinition(FunctionDecl *FD);
1379 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D);
1380 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D);
1381 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
1382 bool isObjCMethodDecl(Decl *D) {
1383 return D && isa<ObjCMethodDecl>(D);
1386 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
1387 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
1388 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
1390 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
1391 /// attribute for which parsing is delayed.
1392 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs);
1394 /// \brief Diagnose any unused parameters in the given sequence of
1395 /// ParmVarDecl pointers.
1396 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin,
1397 ParmVarDecl * const *End);
1399 /// \brief Diagnose whether the size of parameters or return value of a
1400 /// function or obj-c method definition is pass-by-value and larger than a
1401 /// specified threshold.
1402 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin,
1403 ParmVarDecl * const *End,
1407 void DiagnoseInvalidJumps(Stmt *Body);
1408 Decl *ActOnFileScopeAsmDecl(Expr *expr,
1409 SourceLocation AsmLoc,
1410 SourceLocation RParenLoc);
1412 /// \brief The parser has processed a module import declaration.
1414 /// \param AtLoc The location of the '@' symbol, if any.
1416 /// \param ImportLoc The location of the 'import' keyword.
1418 /// \param Path The module access path.
1419 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
1422 /// \brief Retrieve a suitable printing policy.
1423 PrintingPolicy getPrintingPolicy() const {
1424 return getPrintingPolicy(Context, PP);
1427 /// \brief Retrieve a suitable printing policy.
1428 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx,
1429 const Preprocessor &PP);
1432 void ActOnPopScope(SourceLocation Loc, Scope *S);
1433 void ActOnTranslationUnitScope(Scope *S);
1435 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1437 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1439 MultiTemplateParamsArg TemplateParams);
1441 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
1443 RecordDecl *Record);
1445 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
1446 RecordDecl *Record);
1448 bool isAcceptableTagRedeclaration(const TagDecl *Previous,
1449 TagTypeKind NewTag, bool isDefinition,
1450 SourceLocation NewTagLoc,
1451 const IdentifierInfo &Name);
1454 TUK_Reference, // Reference to a tag: 'struct foo *X;'
1455 TUK_Declaration, // Fwd decl of a tag: 'struct foo;'
1456 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;'
1457 TUK_Friend // Friend declaration: 'friend struct foo;'
1460 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
1461 SourceLocation KWLoc, CXXScopeSpec &SS,
1462 IdentifierInfo *Name, SourceLocation NameLoc,
1463 AttributeList *Attr, AccessSpecifier AS,
1464 SourceLocation ModulePrivateLoc,
1465 MultiTemplateParamsArg TemplateParameterLists,
1466 bool &OwnedDecl, bool &IsDependent,
1467 SourceLocation ScopedEnumKWLoc,
1468 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType);
1470 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
1471 unsigned TagSpec, SourceLocation TagLoc,
1473 IdentifierInfo *Name, SourceLocation NameLoc,
1474 AttributeList *Attr,
1475 MultiTemplateParamsArg TempParamLists);
1477 TypeResult ActOnDependentTag(Scope *S,
1480 const CXXScopeSpec &SS,
1481 IdentifierInfo *Name,
1482 SourceLocation TagLoc,
1483 SourceLocation NameLoc);
1485 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart,
1486 IdentifierInfo *ClassName,
1487 SmallVectorImpl<Decl *> &Decls);
1488 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart,
1489 Declarator &D, Expr *BitfieldWidth);
1491 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart,
1492 Declarator &D, Expr *BitfieldWidth,
1493 InClassInitStyle InitStyle,
1494 AccessSpecifier AS);
1496 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T,
1497 TypeSourceInfo *TInfo,
1498 RecordDecl *Record, SourceLocation Loc,
1499 bool Mutable, Expr *BitfieldWidth,
1500 InClassInitStyle InitStyle,
1501 SourceLocation TSSL,
1502 AccessSpecifier AS, NamedDecl *PrevDecl,
1505 enum CXXSpecialMember {
1506 CXXDefaultConstructor,
1514 bool CheckNontrivialField(FieldDecl *FD);
1515 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem);
1516 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
1517 void ActOnLastBitfield(SourceLocation DeclStart,
1518 SmallVectorImpl<Decl *> &AllIvarDecls);
1519 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart,
1520 Declarator &D, Expr *BitfieldWidth,
1521 tok::ObjCKeywordKind visibility);
1523 // This is used for both record definitions and ObjC interface declarations.
1524 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
1525 llvm::ArrayRef<Decl *> Fields,
1526 SourceLocation LBrac, SourceLocation RBrac,
1527 AttributeList *AttrList);
1529 /// ActOnTagStartDefinition - Invoked when we have entered the
1530 /// scope of a tag's definition (e.g., for an enumeration, class,
1531 /// struct, or union).
1532 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl);
1534 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl);
1536 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a
1537 /// C++ record definition's base-specifiers clause and are starting its
1538 /// member declarations.
1539 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl,
1540 SourceLocation FinalLoc,
1541 SourceLocation LBraceLoc);
1543 /// ActOnTagFinishDefinition - Invoked once we have finished parsing
1544 /// the definition of a tag (enumeration, class, struct, or union).
1545 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl,
1546 SourceLocation RBraceLoc);
1548 void ActOnObjCContainerFinishDefinition();
1550 /// \brief Invoked when we must temporarily exit the objective-c container
1551 /// scope for parsing/looking-up C constructs.
1553 /// Must be followed by a call to \see ActOnObjCReenterContainerContext
1554 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC);
1555 void ActOnObjCReenterContainerContext(DeclContext *DC);
1557 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable
1558 /// error parsing the definition of a tag.
1559 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl);
1561 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum,
1562 EnumConstantDecl *LastEnumConst,
1563 SourceLocation IdLoc,
1566 bool CheckEnumUnderlyingType(TypeSourceInfo *TI);
1567 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
1568 QualType EnumUnderlyingTy, const EnumDecl *Prev);
1570 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant,
1571 SourceLocation IdLoc, IdentifierInfo *Id,
1572 AttributeList *Attrs,
1573 SourceLocation EqualLoc, Expr *Val);
1574 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
1575 SourceLocation RBraceLoc, Decl *EnumDecl,
1576 Decl **Elements, unsigned NumElements,
1577 Scope *S, AttributeList *Attr);
1579 DeclContext *getContainingDC(DeclContext *DC);
1581 /// Set the current declaration context until it gets popped.
1582 void PushDeclContext(Scope *S, DeclContext *DC);
1583 void PopDeclContext();
1585 /// EnterDeclaratorContext - Used when we must lookup names in the context
1586 /// of a declarator's nested name specifier.
1587 void EnterDeclaratorContext(Scope *S, DeclContext *DC);
1588 void ExitDeclaratorContext(Scope *S);
1590 /// Push the parameters of D, which must be a function, into scope.
1591 void ActOnReenterFunctionContext(Scope* S, Decl* D);
1592 void ActOnExitFunctionContext();
1594 DeclContext *getFunctionLevelDeclContext();
1596 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
1597 /// to the function decl for the function being parsed. If we're currently
1598 /// in a 'block', this returns the containing context.
1599 FunctionDecl *getCurFunctionDecl();
1601 /// getCurMethodDecl - If inside of a method body, this returns a pointer to
1602 /// the method decl for the method being parsed. If we're currently
1603 /// in a 'block', this returns the containing context.
1604 ObjCMethodDecl *getCurMethodDecl();
1606 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method
1607 /// or C function we're in, otherwise return null. If we're currently
1608 /// in a 'block', this returns the containing context.
1609 NamedDecl *getCurFunctionOrMethodDecl();
1611 /// Add this decl to the scope shadowed decl chains.
1612 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true);
1614 /// \brief Make the given externally-produced declaration visible at the
1615 /// top level scope.
1617 /// \param D The externally-produced declaration to push.
1619 /// \param Name The name of the externally-produced declaration.
1620 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name);
1622 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
1623 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
1624 /// true if 'D' belongs to the given declaration context.
1626 /// \param ExplicitInstantiationOrSpecialization When true, we are checking
1627 /// whether the declaration is in scope for the purposes of explicit template
1628 /// instantiation or specialization. The default is false.
1629 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0,
1630 bool ExplicitInstantiationOrSpecialization = false);
1632 /// Finds the scope corresponding to the given decl context, if it
1633 /// happens to be an enclosing scope. Otherwise return NULL.
1634 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC);
1636 /// Subroutines of ActOnDeclarator().
1637 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
1638 TypeSourceInfo *TInfo);
1639 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
1641 /// Attribute merging methods. Return true if a new attribute was added.
1642 AvailabilityAttr *mergeAvailabilityAttr(Decl *D, SourceRange Range,
1643 IdentifierInfo *Platform,
1644 VersionTuple Introduced,
1645 VersionTuple Deprecated,
1646 VersionTuple Obsoleted,
1649 VisibilityAttr *mergeVisibilityAttr(Decl *D, SourceRange Range,
1650 VisibilityAttr::VisibilityType Vis);
1651 DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range);
1652 DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range);
1653 FormatAttr *mergeFormatAttr(Decl *D, SourceRange Range, StringRef Format,
1654 int FormatIdx, int FirstArg);
1655 SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name);
1656 bool mergeDeclAttribute(Decl *New, InheritableAttr *Attr);
1658 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true);
1659 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls);
1660 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S);
1661 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
1663 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
1664 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls);
1665 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old);
1666 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
1667 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
1669 // AssignmentAction - This is used by all the assignment diagnostic functions
1670 // to represent what is actually causing the operation
1671 enum AssignmentAction {
1681 /// C++ Overloading.
1683 /// This is a legitimate overload: the existing declarations are
1684 /// functions or function templates with different signatures.
1687 /// This is not an overload because the signature exactly matches
1688 /// an existing declaration.
1691 /// This is not an overload because the lookup results contain a
1695 OverloadKind CheckOverload(Scope *S,
1697 const LookupResult &OldDecls,
1698 NamedDecl *&OldDecl,
1699 bool IsForUsingDecl);
1700 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl);
1702 /// \brief Checks availability of the function depending on the current
1703 /// function context.Inside an unavailable function,unavailability is ignored.
1705 /// \returns true if \p FD is unavailable and current context is inside
1706 /// an available function, false otherwise.
1707 bool isFunctionConsideredUnavailable(FunctionDecl *FD);
1709 ImplicitConversionSequence
1710 TryImplicitConversion(Expr *From, QualType ToType,
1711 bool SuppressUserConversions,
1713 bool InOverloadResolution,
1715 bool AllowObjCWritebackConversion);
1717 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType);
1718 bool IsFloatingPointPromotion(QualType FromType, QualType ToType);
1719 bool IsComplexPromotion(QualType FromType, QualType ToType);
1720 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
1721 bool InOverloadResolution,
1722 QualType& ConvertedType, bool &IncompatibleObjC);
1723 bool isObjCPointerConversion(QualType FromType, QualType ToType,
1724 QualType& ConvertedType, bool &IncompatibleObjC);
1725 bool isObjCWritebackConversion(QualType FromType, QualType ToType,
1726 QualType &ConvertedType);
1727 bool IsBlockPointerConversion(QualType FromType, QualType ToType,
1728 QualType& ConvertedType);
1729 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType,
1730 const FunctionProtoType *NewType,
1731 unsigned *ArgPos = 0);
1732 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
1733 QualType FromType, QualType ToType);
1735 CastKind PrepareCastToObjCObjectPointer(ExprResult &E);
1736 bool CheckPointerConversion(Expr *From, QualType ToType,
1738 CXXCastPath& BasePath,
1739 bool IgnoreBaseAccess);
1740 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
1741 bool InOverloadResolution,
1742 QualType &ConvertedType);
1743 bool CheckMemberPointerConversion(Expr *From, QualType ToType,
1745 CXXCastPath &BasePath,
1746 bool IgnoreBaseAccess);
1747 bool IsQualificationConversion(QualType FromType, QualType ToType,
1748 bool CStyle, bool &ObjCLifetimeConversion);
1749 bool IsNoReturnConversion(QualType FromType, QualType ToType,
1750 QualType &ResultTy);
1751 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType);
1754 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity,
1755 const VarDecl *NRVOCandidate,
1756 QualType ResultType,
1758 bool AllowNRVO = true);
1760 bool CanPerformCopyInitialization(const InitializedEntity &Entity,
1762 ExprResult PerformCopyInitialization(const InitializedEntity &Entity,
1763 SourceLocation EqualLoc,
1765 bool TopLevelOfInitList = false,
1766 bool AllowExplicit = false);
1767 ExprResult PerformObjectArgumentInitialization(Expr *From,
1768 NestedNameSpecifier *Qualifier,
1769 NamedDecl *FoundDecl,
1770 CXXMethodDecl *Method);
1772 ExprResult PerformContextuallyConvertToBool(Expr *From);
1773 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From);
1775 /// Contexts in which a converted constant expression is required.
1777 CCEK_CaseValue, ///< Expression in a case label.
1778 CCEK_Enumerator, ///< Enumerator value with fixed underlying type.
1779 CCEK_TemplateArg ///< Value of a non-type template parameter.
1781 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
1782 llvm::APSInt &Value, CCEKind CCE);
1784 /// \brief Abstract base class used to diagnose problems that occur while
1785 /// trying to convert an expression to integral or enumeration type.
1786 class ICEConvertDiagnoser {
1789 bool SuppressConversion;
1791 ICEConvertDiagnoser(bool Suppress = false,
1792 bool SuppressConversion = false)
1793 : Suppress(Suppress), SuppressConversion(SuppressConversion) { }
1795 /// \brief Emits a diagnostic complaining that the expression does not have
1796 /// integral or enumeration type.
1797 virtual DiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc,
1800 /// \brief Emits a diagnostic when the expression has incomplete class type.
1801 virtual DiagnosticBuilder diagnoseIncomplete(Sema &S, SourceLocation Loc,
1804 /// \brief Emits a diagnostic when the only matching conversion function
1806 virtual DiagnosticBuilder diagnoseExplicitConv(Sema &S, SourceLocation Loc,
1808 QualType ConvTy) = 0;
1810 /// \brief Emits a note for the explicit conversion function.
1811 virtual DiagnosticBuilder
1812 noteExplicitConv(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0;
1814 /// \brief Emits a diagnostic when there are multiple possible conversion
1816 virtual DiagnosticBuilder diagnoseAmbiguous(Sema &S, SourceLocation Loc,
1819 /// \brief Emits a note for one of the candidate conversions.
1820 virtual DiagnosticBuilder noteAmbiguous(Sema &S, CXXConversionDecl *Conv,
1821 QualType ConvTy) = 0;
1823 /// \brief Emits a diagnostic when we picked a conversion function
1824 /// (for cases when we are not allowed to pick a conversion function).
1825 virtual DiagnosticBuilder diagnoseConversion(Sema &S, SourceLocation Loc,
1827 QualType ConvTy) = 0;
1829 virtual ~ICEConvertDiagnoser() {}
1833 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE,
1834 ICEConvertDiagnoser &Diagnoser,
1835 bool AllowScopedEnumerations);
1837 enum ObjCSubscriptKind {
1842 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
1844 ExprResult PerformObjectMemberConversion(Expr *From,
1845 NestedNameSpecifier *Qualifier,
1846 NamedDecl *FoundDecl,
1849 // Members have to be NamespaceDecl* or TranslationUnitDecl*.
1850 // TODO: make this is a typesafe union.
1851 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet;
1852 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet;
1854 void AddOverloadCandidate(FunctionDecl *Function,
1855 DeclAccessPair FoundDecl,
1856 llvm::ArrayRef<Expr *> Args,
1857 OverloadCandidateSet& CandidateSet,
1858 bool SuppressUserConversions = false,
1859 bool PartialOverloading = false,
1860 bool AllowExplicit = false);
1861 void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
1862 llvm::ArrayRef<Expr *> Args,
1863 OverloadCandidateSet& CandidateSet,
1864 bool SuppressUserConversions = false,
1865 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
1866 void AddMethodCandidate(DeclAccessPair FoundDecl,
1867 QualType ObjectType,
1868 Expr::Classification ObjectClassification,
1869 Expr **Args, unsigned NumArgs,
1870 OverloadCandidateSet& CandidateSet,
1871 bool SuppressUserConversion = false);
1872 void AddMethodCandidate(CXXMethodDecl *Method,
1873 DeclAccessPair FoundDecl,
1874 CXXRecordDecl *ActingContext, QualType ObjectType,
1875 Expr::Classification ObjectClassification,
1876 llvm::ArrayRef<Expr *> Args,
1877 OverloadCandidateSet& CandidateSet,
1878 bool SuppressUserConversions = false);
1879 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
1880 DeclAccessPair FoundDecl,
1881 CXXRecordDecl *ActingContext,
1882 TemplateArgumentListInfo *ExplicitTemplateArgs,
1883 QualType ObjectType,
1884 Expr::Classification ObjectClassification,
1885 llvm::ArrayRef<Expr *> Args,
1886 OverloadCandidateSet& CandidateSet,
1887 bool SuppressUserConversions = false);
1888 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
1889 DeclAccessPair FoundDecl,
1890 TemplateArgumentListInfo *ExplicitTemplateArgs,
1891 llvm::ArrayRef<Expr *> Args,
1892 OverloadCandidateSet& CandidateSet,
1893 bool SuppressUserConversions = false);
1894 void AddConversionCandidate(CXXConversionDecl *Conversion,
1895 DeclAccessPair FoundDecl,
1896 CXXRecordDecl *ActingContext,
1897 Expr *From, QualType ToType,
1898 OverloadCandidateSet& CandidateSet);
1899 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
1900 DeclAccessPair FoundDecl,
1901 CXXRecordDecl *ActingContext,
1902 Expr *From, QualType ToType,
1903 OverloadCandidateSet &CandidateSet);
1904 void AddSurrogateCandidate(CXXConversionDecl *Conversion,
1905 DeclAccessPair FoundDecl,
1906 CXXRecordDecl *ActingContext,
1907 const FunctionProtoType *Proto,
1908 Expr *Object, llvm::ArrayRef<Expr*> Args,
1909 OverloadCandidateSet& CandidateSet);
1910 void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
1911 SourceLocation OpLoc,
1912 Expr **Args, unsigned NumArgs,
1913 OverloadCandidateSet& CandidateSet,
1914 SourceRange OpRange = SourceRange());
1915 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys,
1916 Expr **Args, unsigned NumArgs,
1917 OverloadCandidateSet& CandidateSet,
1918 bool IsAssignmentOperator = false,
1919 unsigned NumContextualBoolArguments = 0);
1920 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
1921 SourceLocation OpLoc,
1922 Expr **Args, unsigned NumArgs,
1923 OverloadCandidateSet& CandidateSet);
1924 void AddArgumentDependentLookupCandidates(DeclarationName Name,
1925 bool Operator, SourceLocation Loc,
1926 llvm::ArrayRef<Expr *> Args,
1927 TemplateArgumentListInfo *ExplicitTemplateArgs,
1928 OverloadCandidateSet& CandidateSet,
1929 bool PartialOverloading = false);
1931 // Emit as a 'note' the specific overload candidate
1932 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType());
1934 // Emit as a series of 'note's all template and non-templates
1935 // identified by the expression Expr
1936 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType());
1938 // [PossiblyAFunctionType] --> [Return]
1939 // NonFunctionType --> NonFunctionType
1941 // R (*)(A) --> R (A)
1942 // R (&)(A) --> R (A)
1943 // R (S::*)(A) --> R (A)
1944 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType);
1947 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
1948 QualType TargetType,
1950 DeclAccessPair &Found,
1951 bool *pHadMultipleCandidates = 0);
1953 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
1954 bool Complain = false,
1955 DeclAccessPair* Found = 0);
1957 bool ResolveAndFixSingleFunctionTemplateSpecialization(
1958 ExprResult &SrcExpr,
1959 bool DoFunctionPointerConverion = false,
1960 bool Complain = false,
1961 const SourceRange& OpRangeForComplaining = SourceRange(),
1962 QualType DestTypeForComplaining = QualType(),
1963 unsigned DiagIDForComplaining = 0);
1966 Expr *FixOverloadedFunctionReference(Expr *E,
1967 DeclAccessPair FoundDecl,
1969 ExprResult FixOverloadedFunctionReference(ExprResult,
1970 DeclAccessPair FoundDecl,
1973 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
1974 llvm::ArrayRef<Expr *> Args,
1975 OverloadCandidateSet &CandidateSet,
1976 bool PartialOverloading = false);
1978 // An enum used to represent the different possible results of building a
1979 // range-based for loop.
1980 enum ForRangeStatus {
1982 FRS_NoViableFunction,
1983 FRS_DiagnosticIssued
1986 // An enum to represent whether something is dealing with a call to begin()
1987 // or a call to end() in a range-based for loop.
1988 enum BeginEndFunction {
1993 ForRangeStatus BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc,
1994 SourceLocation RangeLoc,
1996 BeginEndFunction BEF,
1997 const DeclarationNameInfo &NameInfo,
1998 LookupResult &MemberLookup,
1999 OverloadCandidateSet *CandidateSet,
2000 Expr *Range, ExprResult *CallExpr);
2002 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn,
2003 UnresolvedLookupExpr *ULE,
2004 SourceLocation LParenLoc,
2005 Expr **Args, unsigned NumArgs,
2006 SourceLocation RParenLoc,
2008 bool AllowTypoCorrection=true);
2010 bool buildOverloadedCallSet(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
2011 Expr **Args, unsigned NumArgs,
2012 SourceLocation RParenLoc,
2013 OverloadCandidateSet *CandidateSet,
2014 ExprResult *Result);
2016 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc,
2018 const UnresolvedSetImpl &Fns,
2021 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc,
2023 const UnresolvedSetImpl &Fns,
2024 Expr *LHS, Expr *RHS);
2026 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
2027 SourceLocation RLoc,
2028 Expr *Base,Expr *Idx);
2031 BuildCallToMemberFunction(Scope *S, Expr *MemExpr,
2032 SourceLocation LParenLoc, Expr **Args,
2033 unsigned NumArgs, SourceLocation RParenLoc);
2035 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc,
2036 Expr **Args, unsigned NumArgs,
2037 SourceLocation RParenLoc);
2039 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base,
2040 SourceLocation OpLoc);
2042 /// CheckCallReturnType - Checks that a call expression's return type is
2043 /// complete. Returns true on failure. The location passed in is the location
2044 /// that best represents the call.
2045 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
2046 CallExpr *CE, FunctionDecl *FD);
2048 /// Helpers for dealing with blocks and functions.
2049 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd,
2050 bool CheckParameterNames);
2051 void CheckCXXDefaultArguments(FunctionDecl *FD);
2052 void CheckExtraCXXDefaultArguments(Declarator &D);
2053 Scope *getNonFieldDeclScope(Scope *S);
2055 /// \name Name lookup
2057 /// These routines provide name lookup that is used during semantic
2058 /// analysis to resolve the various kinds of names (identifiers,
2059 /// overloaded operator names, constructor names, etc.) into zero or
2060 /// more declarations within a particular scope. The major entry
2061 /// points are LookupName, which performs unqualified name lookup,
2062 /// and LookupQualifiedName, which performs qualified name lookup.
2064 /// All name lookup is performed based on some specific criteria,
2065 /// which specify what names will be visible to name lookup and how
2066 /// far name lookup should work. These criteria are important both
2067 /// for capturing language semantics (certain lookups will ignore
2068 /// certain names, for example) and for performance, since name
2069 /// lookup is often a bottleneck in the compilation of C++. Name
2070 /// lookup criteria is specified via the LookupCriteria enumeration.
2072 /// The results of name lookup can vary based on the kind of name
2073 /// lookup performed, the current language, and the translation
2074 /// unit. In C, for example, name lookup will either return nothing
2075 /// (no entity found) or a single declaration. In C++, name lookup
2076 /// can additionally refer to a set of overloaded functions or
2077 /// result in an ambiguity. All of the possible results of name
2078 /// lookup are captured by the LookupResult class, which provides
2079 /// the ability to distinguish among them.
2082 /// @brief Describes the kind of name lookup to perform.
2083 enum LookupNameKind {
2084 /// Ordinary name lookup, which finds ordinary names (functions,
2085 /// variables, typedefs, etc.) in C and most kinds of names
2086 /// (functions, variables, members, types, etc.) in C++.
2087 LookupOrdinaryName = 0,
2088 /// Tag name lookup, which finds the names of enums, classes,
2089 /// structs, and unions.
2091 /// Label name lookup.
2093 /// Member name lookup, which finds the names of
2094 /// class/struct/union members.
2096 /// Look up of an operator name (e.g., operator+) for use with
2097 /// operator overloading. This lookup is similar to ordinary name
2098 /// lookup, but will ignore any declarations that are class members.
2100 /// Look up of a name that precedes the '::' scope resolution
2101 /// operator in C++. This lookup completely ignores operator, object,
2102 /// function, and enumerator names (C++ [basic.lookup.qual]p1).
2103 LookupNestedNameSpecifierName,
2104 /// Look up a namespace name within a C++ using directive or
2105 /// namespace alias definition, ignoring non-namespace names (C++
2106 /// [basic.lookup.udir]p1).
2107 LookupNamespaceName,
2108 /// Look up all declarations in a scope with the given name,
2109 /// including resolved using declarations. This is appropriate
2110 /// for checking redeclarations for a using declaration.
2111 LookupUsingDeclName,
2112 /// Look up an ordinary name that is going to be redeclared as a
2113 /// name with linkage. This lookup ignores any declarations that
2114 /// are outside of the current scope unless they have linkage. See
2115 /// C99 6.2.2p4-5 and C++ [basic.link]p6.
2116 LookupRedeclarationWithLinkage,
2117 /// Look up the name of an Objective-C protocol.
2118 LookupObjCProtocolName,
2119 /// Look up implicit 'self' parameter of an objective-c method.
2120 LookupObjCImplicitSelfParam,
2121 /// \brief Look up any declaration with any name.
2125 /// \brief Specifies whether (or how) name lookup is being performed for a
2126 /// redeclaration (vs. a reference).
2127 enum RedeclarationKind {
2128 /// \brief The lookup is a reference to this name that is not for the
2129 /// purpose of redeclaring the name.
2130 NotForRedeclaration = 0,
2131 /// \brief The lookup results will be used for redeclaration of a name,
2132 /// if an entity by that name already exists.
2136 /// \brief The possible outcomes of name lookup for a literal operator.
2137 enum LiteralOperatorLookupResult {
2138 /// \brief The lookup resulted in an error.
2140 /// \brief The lookup found a single 'cooked' literal operator, which
2141 /// expects a normal literal to be built and passed to it.
2143 /// \brief The lookup found a single 'raw' literal operator, which expects
2144 /// a string literal containing the spelling of the literal token.
2146 /// \brief The lookup found an overload set of literal operator templates,
2147 /// which expect the characters of the spelling of the literal token to be
2148 /// passed as a non-type template argument pack.
2152 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D,
2153 CXXSpecialMember SM,
2161 bool CppLookupName(LookupResult &R, Scope *S);
2163 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls.
2165 // The boolean value will be true to indicate that the namespace was loaded
2166 // from an AST/PCH file, or false otherwise.
2167 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces;
2169 /// \brief Whether we have already loaded known namespaces from an extenal
2171 bool LoadedExternalKnownNamespaces;
2174 /// \brief Look up a name, looking for a single declaration. Return
2175 /// null if the results were absent, ambiguous, or overloaded.
2177 /// It is preferable to use the elaborated form and explicitly handle
2178 /// ambiguity and overloaded.
2179 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
2181 LookupNameKind NameKind,
2182 RedeclarationKind Redecl
2183 = NotForRedeclaration);
2184 bool LookupName(LookupResult &R, Scope *S,
2185 bool AllowBuiltinCreation = false);
2186 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
2187 bool InUnqualifiedLookup = false);
2188 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
2189 bool AllowBuiltinCreation = false,
2190 bool EnteringContext = false);
2191 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc,
2192 RedeclarationKind Redecl
2193 = NotForRedeclaration);
2195 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S,
2196 QualType T1, QualType T2,
2197 UnresolvedSetImpl &Functions);
2199 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc,
2200 SourceLocation GnuLabelLoc = SourceLocation());
2202 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class);
2203 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class);
2204 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class,
2206 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals,
2207 bool RValueThis, unsigned ThisQuals);
2208 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class,
2210 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, unsigned Quals,
2211 bool RValueThis, unsigned ThisQuals);
2212 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class);
2214 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R,
2215 ArrayRef<QualType> ArgTys,
2216 bool AllowRawAndTemplate);
2217 bool isKnownName(StringRef name);
2219 void ArgumentDependentLookup(DeclarationName Name, bool Operator,
2221 llvm::ArrayRef<Expr *> Args,
2222 ADLResult &Functions);
2224 void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
2225 VisibleDeclConsumer &Consumer,
2226 bool IncludeGlobalScope = true);
2227 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind,
2228 VisibleDeclConsumer &Consumer,
2229 bool IncludeGlobalScope = true);
2231 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
2232 Sema::LookupNameKind LookupKind,
2233 Scope *S, CXXScopeSpec *SS,
2234 CorrectionCandidateCallback &CCC,
2235 DeclContext *MemberContext = 0,
2236 bool EnteringContext = false,
2237 const ObjCObjectPointerType *OPT = 0);
2239 void FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc,
2240 llvm::ArrayRef<Expr *> Args,
2241 AssociatedNamespaceSet &AssociatedNamespaces,
2242 AssociatedClassSet &AssociatedClasses);
2244 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,
2245 bool ConsiderLinkage,
2246 bool ExplicitInstantiationOrSpecialization);
2248 bool DiagnoseAmbiguousLookup(LookupResult &Result);
2251 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id,
2252 SourceLocation IdLoc,
2253 bool TypoCorrection = false);
2254 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
2255 Scope *S, bool ForRedeclaration,
2256 SourceLocation Loc);
2257 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
2259 void AddKnownFunctionAttributes(FunctionDecl *FD);
2261 // More parsing and symbol table subroutines.
2263 // Decl attributes - this routine is the top level dispatcher.
2264 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD,
2265 bool NonInheritable = true, bool Inheritable = true);
2266 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
2267 bool NonInheritable = true, bool Inheritable = true);
2268 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
2269 const AttributeList *AttrList);
2271 void checkUnusedDeclAttributes(Declarator &D);
2273 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
2274 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC);
2275 bool CheckNoReturnAttr(const AttributeList &attr);
2277 /// \brief Stmt attributes - this routine is the top level dispatcher.
2278 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
2281 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
2282 bool &IncompleteImpl, unsigned DiagID);
2283 void WarnConflictingTypedMethods(ObjCMethodDecl *Method,
2284 ObjCMethodDecl *MethodDecl,
2285 bool IsProtocolMethodDecl);
2287 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method,
2288 ObjCMethodDecl *Overridden,
2289 bool IsProtocolMethodDecl);
2291 /// WarnExactTypedMethods - This routine issues a warning if method
2292 /// implementation declaration matches exactly that of its declaration.
2293 void WarnExactTypedMethods(ObjCMethodDecl *Method,
2294 ObjCMethodDecl *MethodDecl,
2295 bool IsProtocolMethodDecl);
2297 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl,
2298 ObjCInterfaceDecl *IDecl);
2300 typedef llvm::SmallPtrSet<Selector, 8> SelectorSet;
2301 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap;
2303 /// CheckProtocolMethodDefs - This routine checks unimplemented
2304 /// methods declared in protocol, and those referenced by it.
2305 void CheckProtocolMethodDefs(SourceLocation ImpLoc,
2306 ObjCProtocolDecl *PDecl,
2307 bool& IncompleteImpl,
2308 const SelectorSet &InsMap,
2309 const SelectorSet &ClsMap,
2310 ObjCContainerDecl *CDecl);
2312 /// CheckImplementationIvars - This routine checks if the instance variables
2313 /// listed in the implelementation match those listed in the interface.
2314 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
2315 ObjCIvarDecl **Fields, unsigned nIvars,
2316 SourceLocation Loc);
2318 /// ImplMethodsVsClassMethods - This is main routine to warn if any method
2319 /// remains unimplemented in the class or category \@implementation.
2320 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl,
2321 ObjCContainerDecl* IDecl,
2322 bool IncompleteImpl = false);
2324 /// DiagnoseUnimplementedProperties - This routine warns on those properties
2325 /// which must be implemented by this implementation.
2326 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
2327 ObjCContainerDecl *CDecl,
2328 const SelectorSet &InsMap);
2330 /// DefaultSynthesizeProperties - This routine default synthesizes all
2331 /// properties which must be synthesized in the class's \@implementation.
2332 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl,
2333 ObjCInterfaceDecl *IDecl);
2334 void DefaultSynthesizeProperties(Scope *S, Decl *D);
2336 /// CollectImmediateProperties - This routine collects all properties in
2337 /// the class and its conforming protocols; but not those it its super class.
2338 void CollectImmediateProperties(ObjCContainerDecl *CDecl,
2339 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap,
2340 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap);
2342 /// Called by ActOnProperty to handle \@property declarations in
2343 /// class extensions.
2344 Decl *HandlePropertyInClassExtension(Scope *S,
2345 SourceLocation AtLoc,
2346 SourceLocation LParenLoc,
2347 FieldDeclarator &FD,
2350 const bool isAssign,
2351 const bool isReadWrite,
2352 const unsigned Attributes,
2353 const unsigned AttributesAsWritten,
2354 bool *isOverridingProperty,
2356 tok::ObjCKeywordKind MethodImplKind);
2358 /// Called by ActOnProperty and HandlePropertyInClassExtension to
2359 /// handle creating the ObjcPropertyDecl for a category or \@interface.
2360 ObjCPropertyDecl *CreatePropertyDecl(Scope *S,
2361 ObjCContainerDecl *CDecl,
2362 SourceLocation AtLoc,
2363 SourceLocation LParenLoc,
2364 FieldDeclarator &FD,
2367 const bool isAssign,
2368 const bool isReadWrite,
2369 const unsigned Attributes,
2370 const unsigned AttributesAsWritten,
2372 tok::ObjCKeywordKind MethodImplKind,
2373 DeclContext *lexicalDC = 0);
2375 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via
2376 /// warning) when atomic property has one but not the other user-declared
2377 /// setter or getter.
2378 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl,
2379 ObjCContainerDecl* IDecl);
2381 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D);
2383 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID);
2385 enum MethodMatchStrategy {
2390 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
2391 /// true, or false, accordingly.
2392 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
2393 const ObjCMethodDecl *PrevMethod,
2394 MethodMatchStrategy strategy = MMS_strict);
2396 /// MatchAllMethodDeclarations - Check methods declaraed in interface or
2397 /// or protocol against those declared in their implementations.
2398 void MatchAllMethodDeclarations(const SelectorSet &InsMap,
2399 const SelectorSet &ClsMap,
2400 SelectorSet &InsMapSeen,
2401 SelectorSet &ClsMapSeen,
2402 ObjCImplDecl* IMPDecl,
2403 ObjCContainerDecl* IDecl,
2404 bool &IncompleteImpl,
2405 bool ImmediateClass,
2406 bool WarnCategoryMethodImpl=false);
2408 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in
2409 /// category matches with those implemented in its primary class and
2410 /// warns each time an exact match is found.
2411 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP);
2413 /// \brief Add the given method to the list of globally-known methods.
2414 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method);
2417 /// AddMethodToGlobalPool - Add an instance or factory method to the global
2418 /// pool. See descriptoin of AddInstanceMethodToGlobalPool.
2419 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance);
2421 /// LookupMethodInGlobalPool - Returns the instance or factory method and
2422 /// optionally warns if there are multiple signatures.
2423 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R,
2424 bool receiverIdOrClass,
2425 bool warn, bool instance);
2428 /// AddInstanceMethodToGlobalPool - All instance methods in a translation
2429 /// unit are added to a global pool. This allows us to efficiently associate
2430 /// a selector with a method declaraation for purposes of typechecking
2431 /// messages sent to "id" (where the class of the object is unknown).
2432 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2433 AddMethodToGlobalPool(Method, impl, /*instance*/true);
2436 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
2437 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2438 AddMethodToGlobalPool(Method, impl, /*instance*/false);
2441 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global
2443 void AddAnyMethodToGlobalPool(Decl *D);
2445 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
2446 /// there are multiple signatures.
2447 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R,
2448 bool receiverIdOrClass=false,
2450 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2451 warn, /*instance*/true);
2454 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if
2455 /// there are multiple signatures.
2456 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R,
2457 bool receiverIdOrClass=false,
2459 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2460 warn, /*instance*/false);
2463 /// LookupImplementedMethodInGlobalPool - Returns the method which has an
2465 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel);
2467 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require
2469 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI,
2470 SmallVectorImpl<ObjCIvarDecl*> &Ivars);
2472 //===--------------------------------------------------------------------===//
2473 // Statement Parsing Callbacks: SemaStmt.cpp.
2477 FullExprArg(Sema &actions) : E(0) { }
2479 // FIXME: The const_cast here is ugly. RValue references would make this
2480 // much nicer (or we could duplicate a bunch of the move semantics
2481 // emulation code from Ownership.h).
2482 FullExprArg(const FullExprArg& Other) : E(Other.E) {}
2484 ExprResult release() {
2488 Expr *get() const { return E; }
2490 Expr *operator->() {
2495 // FIXME: No need to make the entire Sema class a friend when it's just
2496 // Sema::MakeFullExpr that needs access to the constructor below.
2499 explicit FullExprArg(Expr *expr) : E(expr) {}
2504 FullExprArg MakeFullExpr(Expr *Arg) {
2505 return MakeFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation());
2507 FullExprArg MakeFullExpr(Expr *Arg, SourceLocation CC) {
2508 return FullExprArg(ActOnFinishFullExpr(Arg, CC).release());
2511 StmtResult ActOnExprStmt(FullExprArg Expr);
2513 StmtResult ActOnNullStmt(SourceLocation SemiLoc,
2514 bool HasLeadingEmptyMacro = false);
2516 void ActOnStartOfCompoundStmt();
2517 void ActOnFinishOfCompoundStmt();
2518 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
2522 /// \brief A RAII object to enter scope of a compound statement.
2523 class CompoundScopeRAII {
2525 CompoundScopeRAII(Sema &S): S(S) {
2526 S.ActOnStartOfCompoundStmt();
2529 ~CompoundScopeRAII() {
2530 S.ActOnFinishOfCompoundStmt();
2537 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl,
2538 SourceLocation StartLoc,
2539 SourceLocation EndLoc);
2540 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl);
2541 StmtResult ActOnForEachLValueExpr(Expr *E);
2542 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal,
2543 SourceLocation DotDotDotLoc, Expr *RHSVal,
2544 SourceLocation ColonLoc);
2545 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt);
2547 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
2548 SourceLocation ColonLoc,
2549 Stmt *SubStmt, Scope *CurScope);
2550 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
2551 SourceLocation ColonLoc, Stmt *SubStmt);
2553 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc,
2554 ArrayRef<const Attr*> Attrs,
2557 StmtResult ActOnIfStmt(SourceLocation IfLoc,
2558 FullExprArg CondVal, Decl *CondVar,
2560 SourceLocation ElseLoc, Stmt *ElseVal);
2561 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc,
2564 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
2565 Stmt *Switch, Stmt *Body);
2566 StmtResult ActOnWhileStmt(SourceLocation WhileLoc,
2568 Decl *CondVar, Stmt *Body);
2569 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body,
2570 SourceLocation WhileLoc,
2571 SourceLocation CondLParen, Expr *Cond,
2572 SourceLocation CondRParen);
2574 StmtResult ActOnForStmt(SourceLocation ForLoc,
2575 SourceLocation LParenLoc,
2576 Stmt *First, FullExprArg Second,
2579 SourceLocation RParenLoc,
2581 ExprResult CheckObjCForCollectionOperand(SourceLocation forLoc,
2583 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
2584 Stmt *First, Expr *collection,
2585 SourceLocation RParenLoc);
2586 StmtResult FinishObjCForCollectionStmt(Stmt *ForCollection, Stmt *Body);
2588 enum BuildForRangeKind {
2589 /// Initial building of a for-range statement.
2591 /// Instantiation or recovery rebuild of a for-range statement. Don't
2592 /// attempt any typo-correction.
2594 /// Determining whether a for-range statement could be built. Avoid any
2595 /// unnecessary or irreversible actions.
2599 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, Stmt *LoopVar,
2600 SourceLocation ColonLoc, Expr *Collection,
2601 SourceLocation RParenLoc,
2602 BuildForRangeKind Kind);
2603 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc,
2604 SourceLocation ColonLoc,
2605 Stmt *RangeDecl, Stmt *BeginEndDecl,
2606 Expr *Cond, Expr *Inc,
2608 SourceLocation RParenLoc,
2609 BuildForRangeKind Kind);
2610 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body);
2612 StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
2613 SourceLocation LabelLoc,
2614 LabelDecl *TheDecl);
2615 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
2616 SourceLocation StarLoc,
2618 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
2619 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope);
2621 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
2622 bool AllowFunctionParameters);
2624 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2625 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2627 StmtResult ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
2628 bool IsVolatile, unsigned NumOutputs,
2629 unsigned NumInputs, IdentifierInfo **Names,
2630 MultiExprArg Constraints, MultiExprArg Exprs,
2631 Expr *AsmString, MultiExprArg Clobbers,
2632 SourceLocation RParenLoc);
2634 NamedDecl *LookupInlineAsmIdentifier(StringRef Name, SourceLocation Loc,
2636 bool LookupInlineAsmField(StringRef Base, StringRef Member,
2637 unsigned &Offset, SourceLocation AsmLoc);
2638 StmtResult ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
2639 ArrayRef<Token> AsmToks, SourceLocation EndLoc);
2641 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType,
2642 SourceLocation StartLoc,
2643 SourceLocation IdLoc, IdentifierInfo *Id,
2644 bool Invalid = false);
2646 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D);
2648 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen,
2649 Decl *Parm, Stmt *Body);
2651 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body);
2653 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
2654 MultiStmtArg Catch, Stmt *Finally);
2656 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw);
2657 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw,
2659 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc,
2661 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
2665 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body);
2667 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo,
2668 SourceLocation StartLoc,
2669 SourceLocation IdLoc,
2670 IdentifierInfo *Id);
2672 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D);
2674 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc,
2675 Decl *ExDecl, Stmt *HandlerBlock);
2676 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
2677 MultiStmtArg Handlers);
2679 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ?
2680 SourceLocation TryLoc,
2684 StmtResult ActOnSEHExceptBlock(SourceLocation Loc,
2688 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc,
2691 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock);
2693 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const;
2695 /// \brief If it's a file scoped decl that must warn if not used, keep track
2697 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D);
2699 /// DiagnoseUnusedExprResult - If the statement passed in is an expression
2700 /// whose result is unused, warn.
2701 void DiagnoseUnusedExprResult(const Stmt *S);
2702 void DiagnoseUnusedDecl(const NamedDecl *ND);
2704 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null
2705 /// statement as a \p Body, and it is located on the same line.
2707 /// This helps prevent bugs due to typos, such as:
2710 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
2714 /// Warn if a for/while loop statement \p S, which is followed by
2715 /// \p PossibleBody, has a suspicious null statement as a body.
2716 void DiagnoseEmptyLoopBody(const Stmt *S,
2717 const Stmt *PossibleBody);
2719 ParsingDeclState PushParsingDeclaration(sema::DelayedDiagnosticPool &pool) {
2720 return DelayedDiagnostics.push(pool);
2722 void PopParsingDeclaration(ParsingDeclState state, Decl *decl);
2724 typedef ProcessingContextState ParsingClassState;
2725 ParsingClassState PushParsingClass() {
2726 return DelayedDiagnostics.pushUndelayed();
2728 void PopParsingClass(ParsingClassState state) {
2729 DelayedDiagnostics.popUndelayed(state);
2732 void redelayDiagnostics(sema::DelayedDiagnosticPool &pool);
2734 void EmitDeprecationWarning(NamedDecl *D, StringRef Message,
2736 const ObjCInterfaceDecl *UnknownObjCClass,
2737 const ObjCPropertyDecl *ObjCProperty);
2739 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
2741 bool makeUnavailableInSystemHeader(SourceLocation loc,
2744 //===--------------------------------------------------------------------===//
2745 // Expression Parsing Callbacks: SemaExpr.cpp.
2747 bool CanUseDecl(NamedDecl *D);
2748 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
2749 const ObjCInterfaceDecl *UnknownObjCClass=0);
2750 void NoteDeletedFunction(FunctionDecl *FD);
2751 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD);
2752 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD,
2753 ObjCMethodDecl *Getter,
2754 SourceLocation Loc);
2755 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
2756 Expr **Args, unsigned NumArgs);
2758 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
2759 Decl *LambdaContextDecl = 0,
2760 bool IsDecltype = false);
2761 enum ReuseLambdaContextDecl_t { ReuseLambdaContextDecl };
2762 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
2763 ReuseLambdaContextDecl_t,
2764 bool IsDecltype = false);
2765 void PopExpressionEvaluationContext();
2767 void DiscardCleanupsInEvaluationContext();
2769 ExprResult TranformToPotentiallyEvaluated(Expr *E);
2770 ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
2772 ExprResult ActOnConstantExpression(ExprResult Res);
2774 // Functions for marking a declaration referenced. These functions also
2775 // contain the relevant logic for marking if a reference to a function or
2776 // variable is an odr-use (in the C++11 sense). There are separate variants
2777 // for expressions referring to a decl; these exist because odr-use marking
2778 // needs to be delayed for some constant variables when we build one of the
2779 // named expressions.
2780 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D);
2781 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func);
2782 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
2783 void MarkDeclRefReferenced(DeclRefExpr *E);
2784 void MarkMemberReferenced(MemberExpr *E);
2786 void UpdateMarkingForLValueToRValue(Expr *E);
2787 void CleanupVarDeclMarking();
2789 enum TryCaptureKind {
2790 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef
2793 /// \brief Try to capture the given variable.
2795 /// \param Var The variable to capture.
2797 /// \param Loc The location at which the capture occurs.
2799 /// \param Kind The kind of capture, which may be implicit (for either a
2800 /// block or a lambda), or explicit by-value or by-reference (for a lambda).
2802 /// \param EllipsisLoc The location of the ellipsis, if one is provided in
2803 /// an explicit lambda capture.
2805 /// \param BuildAndDiagnose Whether we are actually supposed to add the
2806 /// captures or diagnose errors. If false, this routine merely check whether
2807 /// the capture can occur without performing the capture itself or complaining
2808 /// if the variable cannot be captured.
2810 /// \param CaptureType Will be set to the type of the field used to capture
2811 /// this variable in the innermost block or lambda. Only valid when the
2812 /// variable can be captured.
2814 /// \param DeclRefType Will be set to the type of a reference to the capture
2815 /// from within the current scope. Only valid when the variable can be
2818 /// \returns true if an error occurred (i.e., the variable cannot be
2819 /// captured) and false if the capture succeeded.
2820 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind,
2821 SourceLocation EllipsisLoc, bool BuildAndDiagnose,
2822 QualType &CaptureType,
2823 QualType &DeclRefType);
2825 /// \brief Try to capture the given variable.
2826 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
2827 TryCaptureKind Kind = TryCapture_Implicit,
2828 SourceLocation EllipsisLoc = SourceLocation());
2830 /// \brief Given a variable, determine the type that a reference to that
2831 /// variable will have in the given scope.
2832 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc);
2834 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T);
2835 void MarkDeclarationsReferencedInExpr(Expr *E,
2836 bool SkipLocalVariables = false);
2838 /// \brief Try to recover by turning the given expression into a
2839 /// call. Returns true if recovery was attempted or an error was
2840 /// emitted; this may also leave the ExprResult invalid.
2841 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
2842 bool ForceComplain = false,
2843 bool (*IsPlausibleResult)(QualType) = 0);
2845 /// \brief Figure out if an expression could be turned into a call.
2846 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy,
2847 UnresolvedSetImpl &NonTemplateOverloads);
2849 /// \brief Conditionally issue a diagnostic based on the current
2850 /// evaluation context.
2852 /// \param Statement If Statement is non-null, delay reporting the
2853 /// diagnostic until the function body is parsed, and then do a basic
2854 /// reachability analysis to determine if the statement is reachable.
2855 /// If it is unreachable, the diagnostic will not be emitted.
2856 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
2857 const PartialDiagnostic &PD);
2859 // Primary Expressions.
2860 SourceRange getExprRange(Expr *E) const;
2862 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
2863 SourceLocation TemplateKWLoc,
2865 bool HasTrailingLParen, bool IsAddressOfOperand,
2866 CorrectionCandidateCallback *CCC = 0);
2868 void DecomposeUnqualifiedId(const UnqualifiedId &Id,
2869 TemplateArgumentListInfo &Buffer,
2870 DeclarationNameInfo &NameInfo,
2871 const TemplateArgumentListInfo *&TemplateArgs);
2873 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
2874 CorrectionCandidateCallback &CCC,
2875 TemplateArgumentListInfo *ExplicitTemplateArgs = 0,
2876 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>());
2878 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
2880 bool AllowBuiltinCreation=false);
2882 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS,
2883 SourceLocation TemplateKWLoc,
2884 const DeclarationNameInfo &NameInfo,
2885 bool isAddressOfOperand,
2886 const TemplateArgumentListInfo *TemplateArgs);
2888 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2891 const CXXScopeSpec *SS = 0);
2892 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2894 const DeclarationNameInfo &NameInfo,
2895 const CXXScopeSpec *SS = 0);
2897 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS,
2898 SourceLocation nameLoc,
2899 IndirectFieldDecl *indirectField,
2900 Expr *baseObjectExpr = 0,
2901 SourceLocation opLoc = SourceLocation());
2902 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS,
2903 SourceLocation TemplateKWLoc,
2905 const TemplateArgumentListInfo *TemplateArgs);
2906 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS,
2907 SourceLocation TemplateKWLoc,
2909 const TemplateArgumentListInfo *TemplateArgs,
2910 bool IsDefiniteInstance);
2911 bool UseArgumentDependentLookup(const CXXScopeSpec &SS,
2912 const LookupResult &R,
2913 bool HasTrailingLParen);
2915 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
2916 const DeclarationNameInfo &NameInfo,
2917 bool IsAddressOfOperand);
2918 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS,
2919 SourceLocation TemplateKWLoc,
2920 const DeclarationNameInfo &NameInfo,
2921 const TemplateArgumentListInfo *TemplateArgs);
2923 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2926 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2927 const DeclarationNameInfo &NameInfo,
2930 ExprResult BuildLiteralOperatorCall(LookupResult &R,
2931 DeclarationNameInfo &SuffixInfo,
2932 ArrayRef<Expr*> Args,
2933 SourceLocation LitEndLoc,
2934 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
2936 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind);
2937 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val);
2938 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0);
2939 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0);
2940 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E);
2941 ExprResult ActOnParenListExpr(SourceLocation L,
2945 /// ActOnStringLiteral - The specified tokens were lexed as pasted string
2946 /// fragments (e.g. "foo" "bar" L"baz").
2947 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks,
2948 Scope *UDLScope = 0);
2950 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc,
2951 SourceLocation DefaultLoc,
2952 SourceLocation RParenLoc,
2953 Expr *ControllingExpr,
2954 MultiTypeArg ArgTypes,
2955 MultiExprArg ArgExprs);
2956 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc,
2957 SourceLocation DefaultLoc,
2958 SourceLocation RParenLoc,
2959 Expr *ControllingExpr,
2960 TypeSourceInfo **Types,
2962 unsigned NumAssocs);
2964 // Binary/Unary Operators. 'Tok' is the token for the operator.
2965 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
2967 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc,
2968 UnaryOperatorKind Opc, Expr *Input);
2969 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
2970 tok::TokenKind Op, Expr *Input);
2972 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
2973 SourceLocation OpLoc,
2974 UnaryExprOrTypeTrait ExprKind,
2976 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
2977 UnaryExprOrTypeTrait ExprKind);
2979 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
2980 UnaryExprOrTypeTrait ExprKind,
2981 bool IsType, void *TyOrEx,
2982 const SourceRange &ArgRange);
2984 ExprResult CheckPlaceholderExpr(Expr *E);
2985 bool CheckVecStepExpr(Expr *E);
2987 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind);
2988 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc,
2989 SourceRange ExprRange,
2990 UnaryExprOrTypeTrait ExprKind);
2991 ExprResult ActOnSizeofParameterPackExpr(Scope *S,
2992 SourceLocation OpLoc,
2993 IdentifierInfo &Name,
2994 SourceLocation NameLoc,
2995 SourceLocation RParenLoc);
2996 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
2997 tok::TokenKind Kind, Expr *Input);
2999 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
3000 Expr *Idx, SourceLocation RLoc);
3001 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
3002 Expr *Idx, SourceLocation RLoc);
3004 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
3005 SourceLocation OpLoc, bool IsArrow,
3007 SourceLocation TemplateKWLoc,
3008 NamedDecl *FirstQualifierInScope,
3009 const DeclarationNameInfo &NameInfo,
3010 const TemplateArgumentListInfo *TemplateArgs);
3012 // This struct is for use by ActOnMemberAccess to allow
3013 // BuildMemberReferenceExpr to be able to reinvoke ActOnMemberAccess after
3014 // changing the access operator from a '.' to a '->' (to see if that is the
3015 // change needed to fix an error about an unknown member, e.g. when the class
3016 // defines a custom operator->).
3017 struct ActOnMemberAccessExtraArgs {
3021 bool HasTrailingLParen;
3024 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
3025 SourceLocation OpLoc, bool IsArrow,
3026 const CXXScopeSpec &SS,
3027 SourceLocation TemplateKWLoc,
3028 NamedDecl *FirstQualifierInScope,
3030 const TemplateArgumentListInfo *TemplateArgs,
3031 bool SuppressQualifierCheck = false,
3032 ActOnMemberAccessExtraArgs *ExtraArgs = 0);
3034 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow);
3035 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base,
3036 bool &IsArrow, SourceLocation OpLoc,
3039 bool HasTemplateArgs);
3041 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType,
3042 const CXXScopeSpec &SS,
3043 const LookupResult &R);
3045 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType,
3046 bool IsArrow, SourceLocation OpLoc,
3047 const CXXScopeSpec &SS,
3048 SourceLocation TemplateKWLoc,
3049 NamedDecl *FirstQualifierInScope,
3050 const DeclarationNameInfo &NameInfo,
3051 const TemplateArgumentListInfo *TemplateArgs);
3053 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base,
3054 SourceLocation OpLoc,
3055 tok::TokenKind OpKind,
3057 SourceLocation TemplateKWLoc,
3058 UnqualifiedId &Member,
3060 bool HasTrailingLParen);
3062 void ActOnDefaultCtorInitializers(Decl *CDtorDecl);
3063 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
3064 FunctionDecl *FDecl,
3065 const FunctionProtoType *Proto,
3066 Expr **Args, unsigned NumArgs,
3067 SourceLocation RParenLoc,
3068 bool ExecConfig = false);
3069 void CheckStaticArrayArgument(SourceLocation CallLoc,
3071 const Expr *ArgExpr);
3073 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
3074 /// This provides the location of the left/right parens and a list of comma
3076 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
3077 MultiExprArg ArgExprs, SourceLocation RParenLoc,
3078 Expr *ExecConfig = 0, bool IsExecConfig = false);
3079 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
3080 SourceLocation LParenLoc,
3081 Expr **Args, unsigned NumArgs,
3082 SourceLocation RParenLoc,
3084 bool IsExecConfig = false);
3086 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
3087 MultiExprArg ExecConfig,
3088 SourceLocation GGGLoc);
3090 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
3091 Declarator &D, ParsedType &Ty,
3092 SourceLocation RParenLoc, Expr *CastExpr);
3093 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc,
3095 SourceLocation RParenLoc,
3097 CastKind PrepareScalarCast(ExprResult &src, QualType destType);
3099 /// \brief Build an altivec or OpenCL literal.
3100 ExprResult BuildVectorLiteral(SourceLocation LParenLoc,
3101 SourceLocation RParenLoc, Expr *E,
3102 TypeSourceInfo *TInfo);
3104 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME);
3106 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc,
3108 SourceLocation RParenLoc,
3111 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc,
3112 TypeSourceInfo *TInfo,
3113 SourceLocation RParenLoc,
3116 ExprResult ActOnInitList(SourceLocation LBraceLoc,
3117 MultiExprArg InitArgList,
3118 SourceLocation RBraceLoc);
3120 ExprResult ActOnDesignatedInitializer(Designation &Desig,
3125 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc,
3126 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr);
3127 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc,
3128 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr);
3129 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc,
3130 Expr *LHSExpr, Expr *RHSExpr);
3132 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
3133 /// in the case of a the GNU conditional expr extension.
3134 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
3135 SourceLocation ColonLoc,
3136 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr);
3138 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
3139 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
3140 LabelDecl *TheDecl);
3142 void ActOnStartStmtExpr();
3143 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
3144 SourceLocation RPLoc); // "({..})"
3145 void ActOnStmtExprError();
3147 // __builtin_offsetof(type, identifier(.identifier|[expr])*)
3148 struct OffsetOfComponent {
3149 SourceLocation LocStart, LocEnd;
3150 bool isBrackets; // true if [expr], false if .ident
3152 IdentifierInfo *IdentInfo;
3157 /// __builtin_offsetof(type, a.b[123][456].c)
3158 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
3159 TypeSourceInfo *TInfo,
3160 OffsetOfComponent *CompPtr,
3161 unsigned NumComponents,
3162 SourceLocation RParenLoc);
3163 ExprResult ActOnBuiltinOffsetOf(Scope *S,
3164 SourceLocation BuiltinLoc,
3165 SourceLocation TypeLoc,
3166 ParsedType ParsedArgTy,
3167 OffsetOfComponent *CompPtr,
3168 unsigned NumComponents,
3169 SourceLocation RParenLoc);
3171 // __builtin_choose_expr(constExpr, expr1, expr2)
3172 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
3173 Expr *CondExpr, Expr *LHSExpr,
3174 Expr *RHSExpr, SourceLocation RPLoc);
3176 // __builtin_va_arg(expr, type)
3177 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty,
3178 SourceLocation RPLoc);
3179 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E,
3180 TypeSourceInfo *TInfo, SourceLocation RPLoc);
3183 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc);
3185 bool CheckCaseExpression(Expr *E);
3187 /// \brief Describes the result of an "if-exists" condition check.
3188 enum IfExistsResult {
3189 /// \brief The symbol exists.
3192 /// \brief The symbol does not exist.
3195 /// \brief The name is a dependent name, so the results will differ
3196 /// from one instantiation to the next.
3199 /// \brief An error occurred.
3204 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS,
3205 const DeclarationNameInfo &TargetNameInfo);
3208 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc,
3209 bool IsIfExists, CXXScopeSpec &SS,
3210 UnqualifiedId &Name);
3212 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc,
3214 NestedNameSpecifierLoc QualifierLoc,
3215 DeclarationNameInfo NameInfo,
3217 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc,
3219 CXXScopeSpec &SS, UnqualifiedId &Name,
3222 //===------------------------- "Block" Extension ------------------------===//
3224 /// ActOnBlockStart - This callback is invoked when a block literal is
3226 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope);
3228 /// ActOnBlockArguments - This callback allows processing of block arguments.
3229 /// If there are no arguments, this is still invoked.
3230 void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo,
3233 /// ActOnBlockError - If there is an error parsing a block, this callback
3234 /// is invoked to pop the information about the block from the action impl.
3235 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope);
3237 /// ActOnBlockStmtExpr - This is called when the body of a block statement
3238 /// literal was successfully completed. ^(int x){...}
3239 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body,
3242 //===---------------------------- OpenCL Features -----------------------===//
3244 /// __builtin_astype(...)
3245 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
3246 SourceLocation BuiltinLoc,
3247 SourceLocation RParenLoc);
3249 //===---------------------------- C++ Features --------------------------===//
3251 // Act on C++ namespaces
3252 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc,
3253 SourceLocation NamespaceLoc,
3254 SourceLocation IdentLoc,
3255 IdentifierInfo *Ident,
3256 SourceLocation LBrace,
3257 AttributeList *AttrList);
3258 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace);
3260 NamespaceDecl *getStdNamespace() const;
3261 NamespaceDecl *getOrCreateStdNamespace();
3263 CXXRecordDecl *getStdBadAlloc() const;
3265 /// \brief Tests whether Ty is an instance of std::initializer_list and, if
3266 /// it is and Element is not NULL, assigns the element type to Element.
3267 bool isStdInitializerList(QualType Ty, QualType *Element);
3269 /// \brief Looks for the std::initializer_list template and instantiates it
3270 /// with Element, or emits an error if it's not found.
3272 /// \returns The instantiated template, or null on error.
3273 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc);
3275 /// \brief Determine whether Ctor is an initializer-list constructor, as
3276 /// defined in [dcl.init.list]p2.
3277 bool isInitListConstructor(const CXXConstructorDecl *Ctor);
3279 Decl *ActOnUsingDirective(Scope *CurScope,
3280 SourceLocation UsingLoc,
3281 SourceLocation NamespcLoc,
3283 SourceLocation IdentLoc,
3284 IdentifierInfo *NamespcName,
3285 AttributeList *AttrList);
3287 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir);
3289 Decl *ActOnNamespaceAliasDef(Scope *CurScope,
3290 SourceLocation NamespaceLoc,
3291 SourceLocation AliasLoc,
3292 IdentifierInfo *Alias,
3294 SourceLocation IdentLoc,
3295 IdentifierInfo *Ident);
3297 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow);
3298 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target,
3299 const LookupResult &PreviousDecls);
3300 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD,
3303 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
3305 const CXXScopeSpec &SS,
3306 SourceLocation NameLoc,
3307 const LookupResult &Previous);
3308 bool CheckUsingDeclQualifier(SourceLocation UsingLoc,
3309 const CXXScopeSpec &SS,
3310 SourceLocation NameLoc);
3312 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
3313 SourceLocation UsingLoc,
3315 const DeclarationNameInfo &NameInfo,
3316 AttributeList *AttrList,
3317 bool IsInstantiation,
3319 SourceLocation TypenameLoc);
3321 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD);
3323 Decl *ActOnUsingDeclaration(Scope *CurScope,
3325 bool HasUsingKeyword,
3326 SourceLocation UsingLoc,
3328 UnqualifiedId &Name,
3329 AttributeList *AttrList,
3331 SourceLocation TypenameLoc);
3332 Decl *ActOnAliasDeclaration(Scope *CurScope,
3334 MultiTemplateParamsArg TemplateParams,
3335 SourceLocation UsingLoc,
3336 UnqualifiedId &Name,
3339 /// InitializeVarWithConstructor - Creates an CXXConstructExpr
3340 /// and sets it as the initializer for the passed in VarDecl.
3341 bool InitializeVarWithConstructor(VarDecl *VD,
3342 CXXConstructorDecl *Constructor,
3344 bool HadMultipleCandidates);
3346 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
3347 /// including handling of its default argument expressions.
3349 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind
3351 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3352 CXXConstructorDecl *Constructor, MultiExprArg Exprs,
3353 bool HadMultipleCandidates, bool RequiresZeroInit,
3354 unsigned ConstructKind, SourceRange ParenRange);
3356 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if
3357 // the constructor can be elidable?
3359 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3360 CXXConstructorDecl *Constructor, bool Elidable,
3361 MultiExprArg Exprs, bool HadMultipleCandidates,
3362 bool RequiresZeroInit, unsigned ConstructKind,
3363 SourceRange ParenRange);
3365 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
3366 /// the default expr if needed.
3367 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
3369 ParmVarDecl *Param);
3371 /// FinalizeVarWithDestructor - Prepare for calling destructor on the
3372 /// constructed variable.
3373 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType);
3375 /// \brief Helper class that collects exception specifications for
3376 /// implicitly-declared special member functions.
3377 class ImplicitExceptionSpecification {
3378 // Pointer to allow copying
3380 // We order exception specifications thus:
3381 // noexcept is the most restrictive, but is only used in C++11.
3382 // throw() comes next.
3383 // Then a throw(collected exceptions)
3384 // Finally no specification, which is expressed as noexcept(false).
3385 // throw(...) is used instead if any called function uses it.
3386 ExceptionSpecificationType ComputedEST;
3387 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen;
3388 SmallVector<QualType, 4> Exceptions;
3390 void ClearExceptions() {
3391 ExceptionsSeen.clear();
3396 explicit ImplicitExceptionSpecification(Sema &Self)
3397 : Self(&Self), ComputedEST(EST_BasicNoexcept) {
3398 if (!Self.getLangOpts().CPlusPlus0x)
3399 ComputedEST = EST_DynamicNone;
3402 /// \brief Get the computed exception specification type.
3403 ExceptionSpecificationType getExceptionSpecType() const {
3404 assert(ComputedEST != EST_ComputedNoexcept &&
3405 "noexcept(expr) should not be a possible result");
3409 /// \brief The number of exceptions in the exception specification.
3410 unsigned size() const { return Exceptions.size(); }
3412 /// \brief The set of exceptions in the exception specification.
3413 const QualType *data() const { return Exceptions.data(); }
3415 /// \brief Integrate another called method into the collected data.
3416 void CalledDecl(SourceLocation CallLoc, CXXMethodDecl *Method);
3418 /// \brief Integrate an invoked expression into the collected data.
3419 void CalledExpr(Expr *E);
3421 /// \brief Overwrite an EPI's exception specification with this
3422 /// computed exception specification.
3423 void getEPI(FunctionProtoType::ExtProtoInfo &EPI) const {
3424 EPI.ExceptionSpecType = getExceptionSpecType();
3425 if (EPI.ExceptionSpecType == EST_Dynamic) {
3426 EPI.NumExceptions = size();
3427 EPI.Exceptions = data();
3428 } else if (EPI.ExceptionSpecType == EST_None) {
3429 /// C++11 [except.spec]p14:
3430 /// The exception-specification is noexcept(false) if the set of
3431 /// potential exceptions of the special member function contains "any"
3432 EPI.ExceptionSpecType = EST_ComputedNoexcept;
3433 EPI.NoexceptExpr = Self->ActOnCXXBoolLiteral(SourceLocation(),
3434 tok::kw_false).take();
3437 FunctionProtoType::ExtProtoInfo getEPI() const {
3438 FunctionProtoType::ExtProtoInfo EPI;
3444 /// \brief Determine what sort of exception specification a defaulted
3445 /// copy constructor of a class will have.
3446 ImplicitExceptionSpecification
3447 ComputeDefaultedDefaultCtorExceptionSpec(SourceLocation Loc,
3450 /// \brief Determine what sort of exception specification a defaulted
3451 /// default constructor of a class will have, and whether the parameter
3453 ImplicitExceptionSpecification
3454 ComputeDefaultedCopyCtorExceptionSpec(CXXMethodDecl *MD);
3456 /// \brief Determine what sort of exception specification a defautled
3457 /// copy assignment operator of a class will have, and whether the
3458 /// parameter will be const.
3459 ImplicitExceptionSpecification
3460 ComputeDefaultedCopyAssignmentExceptionSpec(CXXMethodDecl *MD);
3462 /// \brief Determine what sort of exception specification a defaulted move
3463 /// constructor of a class will have.
3464 ImplicitExceptionSpecification
3465 ComputeDefaultedMoveCtorExceptionSpec(CXXMethodDecl *MD);
3467 /// \brief Determine what sort of exception specification a defaulted move
3468 /// assignment operator of a class will have.
3469 ImplicitExceptionSpecification
3470 ComputeDefaultedMoveAssignmentExceptionSpec(CXXMethodDecl *MD);
3472 /// \brief Determine what sort of exception specification a defaulted
3473 /// destructor of a class will have.
3474 ImplicitExceptionSpecification
3475 ComputeDefaultedDtorExceptionSpec(CXXMethodDecl *MD);
3477 /// \brief Evaluate the implicit exception specification for a defaulted
3478 /// special member function.
3479 void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD);
3481 /// \brief Check the given exception-specification and update the
3482 /// extended prototype information with the results.
3483 void checkExceptionSpecification(ExceptionSpecificationType EST,
3484 ArrayRef<ParsedType> DynamicExceptions,
3485 ArrayRef<SourceRange> DynamicExceptionRanges,
3487 llvm::SmallVectorImpl<QualType> &Exceptions,
3488 FunctionProtoType::ExtProtoInfo &EPI);
3490 /// \brief Determine if a special member function should have a deleted
3491 /// definition when it is defaulted.
3492 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
3493 bool Diagnose = false);
3495 /// \brief Declare the implicit default constructor for the given class.
3497 /// \param ClassDecl The class declaration into which the implicit
3498 /// default constructor will be added.
3500 /// \returns The implicitly-declared default constructor.
3501 CXXConstructorDecl *DeclareImplicitDefaultConstructor(
3502 CXXRecordDecl *ClassDecl);
3504 /// DefineImplicitDefaultConstructor - Checks for feasibility of
3505 /// defining this constructor as the default constructor.
3506 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
3507 CXXConstructorDecl *Constructor);
3509 /// \brief Declare the implicit destructor for the given class.
3511 /// \param ClassDecl The class declaration into which the implicit
3512 /// destructor will be added.
3514 /// \returns The implicitly-declared destructor.
3515 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl);
3517 /// DefineImplicitDestructor - Checks for feasibility of
3518 /// defining this destructor as the default destructor.
3519 void DefineImplicitDestructor(SourceLocation CurrentLocation,
3520 CXXDestructorDecl *Destructor);
3522 /// \brief Build an exception spec for destructors that don't have one.
3524 /// C++11 says that user-defined destructors with no exception spec get one
3525 /// that looks as if the destructor was implicitly declared.
3526 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
3527 CXXDestructorDecl *Destructor);
3529 /// \brief Declare all inherited constructors for the given class.
3531 /// \param ClassDecl The class declaration into which the inherited
3532 /// constructors will be added.
3533 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl);
3535 /// \brief Declare the implicit copy constructor for the given class.
3537 /// \param ClassDecl The class declaration into which the implicit
3538 /// copy constructor will be added.
3540 /// \returns The implicitly-declared copy constructor.
3541 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl);
3543 /// DefineImplicitCopyConstructor - Checks for feasibility of
3544 /// defining this constructor as the copy constructor.
3545 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
3546 CXXConstructorDecl *Constructor);
3548 /// \brief Declare the implicit move constructor for the given class.
3550 /// \param ClassDecl The Class declaration into which the implicit
3551 /// move constructor will be added.
3553 /// \returns The implicitly-declared move constructor, or NULL if it wasn't
3555 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl);
3557 /// DefineImplicitMoveConstructor - Checks for feasibility of
3558 /// defining this constructor as the move constructor.
3559 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
3560 CXXConstructorDecl *Constructor);
3562 /// \brief Declare the implicit copy assignment operator for the given class.
3564 /// \param ClassDecl The class declaration into which the implicit
3565 /// copy assignment operator will be added.
3567 /// \returns The implicitly-declared copy assignment operator.
3568 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl);
3570 /// \brief Defines an implicitly-declared copy assignment operator.
3571 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
3572 CXXMethodDecl *MethodDecl);
3574 /// \brief Declare the implicit move assignment operator for the given class.
3576 /// \param ClassDecl The Class declaration into which the implicit
3577 /// move assignment operator will be added.
3579 /// \returns The implicitly-declared move assignment operator, or NULL if it
3580 /// wasn't declared.
3581 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl);
3583 /// \brief Defines an implicitly-declared move assignment operator.
3584 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
3585 CXXMethodDecl *MethodDecl);
3587 /// \brief Force the declaration of any implicitly-declared members of this
3589 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class);
3591 /// \brief Determine whether the given function is an implicitly-deleted
3592 /// special member function.
3593 bool isImplicitlyDeleted(FunctionDecl *FD);
3595 /// \brief Check whether 'this' shows up in the type of a static member
3596 /// function after the (naturally empty) cv-qualifier-seq would be.
3598 /// \returns true if an error occurred.
3599 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method);
3601 /// \brief Whether this' shows up in the exception specification of a static
3602 /// member function.
3603 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method);
3605 /// \brief Check whether 'this' shows up in the attributes of the given
3606 /// static member function.
3608 /// \returns true if an error occurred.
3609 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method);
3611 /// MaybeBindToTemporary - If the passed in expression has a record type with
3612 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise
3613 /// it simply returns the passed in expression.
3614 ExprResult MaybeBindToTemporary(Expr *E);
3616 bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
3617 MultiExprArg ArgsPtr,
3619 SmallVectorImpl<Expr*> &ConvertedArgs,
3620 bool AllowExplicit = false);
3622 ParsedType getDestructorName(SourceLocation TildeLoc,
3623 IdentifierInfo &II, SourceLocation NameLoc,
3624 Scope *S, CXXScopeSpec &SS,
3625 ParsedType ObjectType,
3626 bool EnteringContext);
3628 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType);
3630 // Checks that reinterpret casts don't have undefined behavior.
3631 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType,
3632 bool IsDereference, SourceRange Range);
3634 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
3635 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc,
3636 tok::TokenKind Kind,
3637 SourceLocation LAngleBracketLoc,
3639 SourceLocation RAngleBracketLoc,
3640 SourceLocation LParenLoc,
3642 SourceLocation RParenLoc);
3644 ExprResult BuildCXXNamedCast(SourceLocation OpLoc,
3645 tok::TokenKind Kind,
3648 SourceRange AngleBrackets,
3649 SourceRange Parens);
3651 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3652 SourceLocation TypeidLoc,
3653 TypeSourceInfo *Operand,
3654 SourceLocation RParenLoc);
3655 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3656 SourceLocation TypeidLoc,
3658 SourceLocation RParenLoc);
3660 /// ActOnCXXTypeid - Parse typeid( something ).
3661 ExprResult ActOnCXXTypeid(SourceLocation OpLoc,
3662 SourceLocation LParenLoc, bool isType,
3664 SourceLocation RParenLoc);
3666 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3667 SourceLocation TypeidLoc,
3668 TypeSourceInfo *Operand,
3669 SourceLocation RParenLoc);
3670 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3671 SourceLocation TypeidLoc,
3673 SourceLocation RParenLoc);
3675 /// ActOnCXXUuidof - Parse __uuidof( something ).
3676 ExprResult ActOnCXXUuidof(SourceLocation OpLoc,
3677 SourceLocation LParenLoc, bool isType,
3679 SourceLocation RParenLoc);
3682 //// ActOnCXXThis - Parse 'this' pointer.
3683 ExprResult ActOnCXXThis(SourceLocation loc);
3685 /// \brief Try to retrieve the type of the 'this' pointer.
3687 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type.
3688 QualType getCurrentThisType();
3690 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the
3691 /// current context not being a non-static member function. In such cases,
3692 /// this provides the type used for 'this'.
3693 QualType CXXThisTypeOverride;
3695 /// \brief RAII object used to temporarily allow the C++ 'this' expression
3696 /// to be used, with the given qualifiers on the current class type.
3697 class CXXThisScopeRAII {
3699 QualType OldCXXThisTypeOverride;
3703 /// \brief Introduce a new scope where 'this' may be allowed (when enabled),
3704 /// using the given declaration (which is either a class template or a
3705 /// class) along with the given qualifiers.
3706 /// along with the qualifiers placed on '*this'.
3707 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals,
3708 bool Enabled = true);
3710 ~CXXThisScopeRAII();
3713 /// \brief Make sure the value of 'this' is actually available in the current
3714 /// context, if it is a potentially evaluated context.
3716 /// \param Loc The location at which the capture of 'this' occurs.
3718 /// \param Explicit Whether 'this' is explicitly captured in a lambda
3720 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false);
3722 /// \brief Determine whether the given type is the type of *this that is used
3723 /// outside of the body of a member function for a type that is currently
3725 bool isThisOutsideMemberFunctionBody(QualType BaseType);
3727 /// ActOnCXXBoolLiteral - Parse {true,false} literals.
3728 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3731 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
3732 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3734 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
3735 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc);
3737 //// ActOnCXXThrow - Parse throw expressions.
3738 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr);
3739 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
3740 bool IsThrownVarInScope);
3741 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E,
3742 bool IsThrownVarInScope);
3744 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
3745 /// Can be interpreted either as function-style casting ("int(x)")
3746 /// or class type construction ("ClassType(x,y,z)")
3747 /// or creation of a value-initialized type ("int()").
3748 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep,
3749 SourceLocation LParenLoc,
3751 SourceLocation RParenLoc);
3753 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type,
3754 SourceLocation LParenLoc,
3756 SourceLocation RParenLoc);
3758 /// ActOnCXXNew - Parsed a C++ 'new' expression.
3759 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
3760 SourceLocation PlacementLParen,
3761 MultiExprArg PlacementArgs,
3762 SourceLocation PlacementRParen,
3763 SourceRange TypeIdParens, Declarator &D,
3765 ExprResult BuildCXXNew(SourceRange Range, bool UseGlobal,
3766 SourceLocation PlacementLParen,
3767 MultiExprArg PlacementArgs,
3768 SourceLocation PlacementRParen,
3769 SourceRange TypeIdParens,
3771 TypeSourceInfo *AllocTypeInfo,
3773 SourceRange DirectInitRange,
3775 bool TypeMayContainAuto = true);
3777 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc,
3779 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
3780 bool UseGlobal, QualType AllocType, bool IsArray,
3781 Expr **PlaceArgs, unsigned NumPlaceArgs,
3782 FunctionDecl *&OperatorNew,
3783 FunctionDecl *&OperatorDelete);
3784 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range,
3785 DeclarationName Name, Expr** Args,
3786 unsigned NumArgs, DeclContext *Ctx,
3787 bool AllowMissing, FunctionDecl *&Operator,
3788 bool Diagnose = true);
3789 void DeclareGlobalNewDelete();
3790 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return,
3792 bool addMallocAttr = false);
3794 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
3795 DeclarationName Name, FunctionDecl* &Operator,
3796 bool Diagnose = true);
3798 /// ActOnCXXDelete - Parsed a C++ 'delete' expression
3799 ExprResult ActOnCXXDelete(SourceLocation StartLoc,
3800 bool UseGlobal, bool ArrayForm,
3803 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D);
3804 ExprResult CheckConditionVariable(VarDecl *ConditionVar,
3805 SourceLocation StmtLoc,
3806 bool ConvertToBoolean);
3808 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen,
3809 Expr *Operand, SourceLocation RParen);
3810 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
3811 SourceLocation RParen);
3813 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support
3814 /// pseudo-functions.
3815 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT,
3816 SourceLocation KWLoc,
3818 SourceLocation RParen);
3820 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT,
3821 SourceLocation KWLoc,
3823 SourceLocation RParen);
3825 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support
3826 /// pseudo-functions.
3827 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT,
3828 SourceLocation KWLoc,
3831 SourceLocation RParen);
3833 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT,
3834 SourceLocation KWLoc,
3835 TypeSourceInfo *LhsT,
3836 TypeSourceInfo *RhsT,
3837 SourceLocation RParen);
3839 /// \brief Parsed one of the type trait support pseudo-functions.
3840 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3841 ArrayRef<ParsedType> Args,
3842 SourceLocation RParenLoc);
3843 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3844 ArrayRef<TypeSourceInfo *> Args,
3845 SourceLocation RParenLoc);
3847 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support
3848 /// pseudo-functions.
3849 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT,
3850 SourceLocation KWLoc,
3853 SourceLocation RParen);
3855 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT,
3856 SourceLocation KWLoc,
3857 TypeSourceInfo *TSInfo,
3859 SourceLocation RParen);
3861 /// ActOnExpressionTrait - Parsed one of the unary type trait support
3862 /// pseudo-functions.
3863 ExprResult ActOnExpressionTrait(ExpressionTrait OET,
3864 SourceLocation KWLoc,
3866 SourceLocation RParen);
3868 ExprResult BuildExpressionTrait(ExpressionTrait OET,
3869 SourceLocation KWLoc,
3871 SourceLocation RParen);
3873 ExprResult ActOnStartCXXMemberReference(Scope *S,
3875 SourceLocation OpLoc,
3876 tok::TokenKind OpKind,
3877 ParsedType &ObjectType,
3878 bool &MayBePseudoDestructor);
3880 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr);
3882 ExprResult BuildPseudoDestructorExpr(Expr *Base,
3883 SourceLocation OpLoc,
3884 tok::TokenKind OpKind,
3885 const CXXScopeSpec &SS,
3886 TypeSourceInfo *ScopeType,
3887 SourceLocation CCLoc,
3888 SourceLocation TildeLoc,
3889 PseudoDestructorTypeStorage DestroyedType,
3890 bool HasTrailingLParen);
3892 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3893 SourceLocation OpLoc,
3894 tok::TokenKind OpKind,
3896 UnqualifiedId &FirstTypeName,
3897 SourceLocation CCLoc,
3898 SourceLocation TildeLoc,
3899 UnqualifiedId &SecondTypeName,
3900 bool HasTrailingLParen);
3902 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3903 SourceLocation OpLoc,
3904 tok::TokenKind OpKind,
3905 SourceLocation TildeLoc,
3907 bool HasTrailingLParen);
3909 /// MaybeCreateExprWithCleanups - If the current full-expression
3910 /// requires any cleanups, surround it with a ExprWithCleanups node.
3911 /// Otherwise, just returns the passed-in expression.
3912 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr);
3913 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt);
3914 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr);
3916 ExprResult ActOnFinishFullExpr(Expr *Expr) {
3917 return ActOnFinishFullExpr(Expr, Expr ? Expr->getExprLoc()
3918 : SourceLocation());
3920 ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC);
3921 StmtResult ActOnFinishFullStmt(Stmt *Stmt);
3923 // Marks SS invalid if it represents an incomplete type.
3924 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC);
3926 DeclContext *computeDeclContext(QualType T);
3927 DeclContext *computeDeclContext(const CXXScopeSpec &SS,
3928 bool EnteringContext = false);
3929 bool isDependentScopeSpecifier(const CXXScopeSpec &SS);
3930 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS);
3931 bool isUnknownSpecialization(const CXXScopeSpec &SS);
3933 /// \brief The parser has parsed a global nested-name-specifier '::'.
3935 /// \param S The scope in which this nested-name-specifier occurs.
3937 /// \param CCLoc The location of the '::'.
3939 /// \param SS The nested-name-specifier, which will be updated in-place
3940 /// to reflect the parsed nested-name-specifier.
3942 /// \returns true if an error occurred, false otherwise.
3943 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc,
3946 bool isAcceptableNestedNameSpecifier(NamedDecl *SD);
3947 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
3949 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
3950 SourceLocation IdLoc,
3952 ParsedType ObjectType);
3954 bool BuildCXXNestedNameSpecifier(Scope *S,
3955 IdentifierInfo &Identifier,
3956 SourceLocation IdentifierLoc,
3957 SourceLocation CCLoc,
3958 QualType ObjectType,
3959 bool EnteringContext,
3961 NamedDecl *ScopeLookupResult,
3962 bool ErrorRecoveryLookup);
3964 /// \brief The parser has parsed a nested-name-specifier 'identifier::'.
3966 /// \param S The scope in which this nested-name-specifier occurs.
3968 /// \param Identifier The identifier preceding the '::'.
3970 /// \param IdentifierLoc The location of the identifier.
3972 /// \param CCLoc The location of the '::'.
3974 /// \param ObjectType The type of the object, if we're parsing
3975 /// nested-name-specifier in a member access expression.
3977 /// \param EnteringContext Whether we're entering the context nominated by
3978 /// this nested-name-specifier.
3980 /// \param SS The nested-name-specifier, which is both an input
3981 /// parameter (the nested-name-specifier before this type) and an
3982 /// output parameter (containing the full nested-name-specifier,
3983 /// including this new type).
3985 /// \returns true if an error occurred, false otherwise.
3986 bool ActOnCXXNestedNameSpecifier(Scope *S,
3987 IdentifierInfo &Identifier,
3988 SourceLocation IdentifierLoc,
3989 SourceLocation CCLoc,
3990 ParsedType ObjectType,
3991 bool EnteringContext,
3994 ExprResult ActOnDecltypeExpression(Expr *E);
3996 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS,
3998 SourceLocation ColonColonLoc);
4000 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS,
4001 IdentifierInfo &Identifier,
4002 SourceLocation IdentifierLoc,
4003 SourceLocation ColonLoc,
4004 ParsedType ObjectType,
4005 bool EnteringContext);
4007 /// \brief The parser has parsed a nested-name-specifier
4008 /// 'template[opt] template-name < template-args >::'.
4010 /// \param S The scope in which this nested-name-specifier occurs.
4012 /// \param SS The nested-name-specifier, which is both an input
4013 /// parameter (the nested-name-specifier before this type) and an
4014 /// output parameter (containing the full nested-name-specifier,
4015 /// including this new type).
4017 /// \param TemplateKWLoc the location of the 'template' keyword, if any.
4018 /// \param TemplateName the template name.
4019 /// \param TemplateNameLoc The location of the template name.
4020 /// \param LAngleLoc The location of the opening angle bracket ('<').
4021 /// \param TemplateArgs The template arguments.
4022 /// \param RAngleLoc The location of the closing angle bracket ('>').
4023 /// \param CCLoc The location of the '::'.
4025 /// \param EnteringContext Whether we're entering the context of the
4026 /// nested-name-specifier.
4029 /// \returns true if an error occurred, false otherwise.
4030 bool ActOnCXXNestedNameSpecifier(Scope *S,
4032 SourceLocation TemplateKWLoc,
4033 TemplateTy TemplateName,
4034 SourceLocation TemplateNameLoc,
4035 SourceLocation LAngleLoc,
4036 ASTTemplateArgsPtr TemplateArgs,
4037 SourceLocation RAngleLoc,
4038 SourceLocation CCLoc,
4039 bool EnteringContext);
4041 /// \brief Given a C++ nested-name-specifier, produce an annotation value
4042 /// that the parser can use later to reconstruct the given
4043 /// nested-name-specifier.
4045 /// \param SS A nested-name-specifier.
4047 /// \returns A pointer containing all of the information in the
4048 /// nested-name-specifier \p SS.
4049 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS);
4051 /// \brief Given an annotation pointer for a nested-name-specifier, restore
4052 /// the nested-name-specifier structure.
4054 /// \param Annotation The annotation pointer, produced by
4055 /// \c SaveNestedNameSpecifierAnnotation().
4057 /// \param AnnotationRange The source range corresponding to the annotation.
4059 /// \param SS The nested-name-specifier that will be updated with the contents
4060 /// of the annotation pointer.
4061 void RestoreNestedNameSpecifierAnnotation(void *Annotation,
4062 SourceRange AnnotationRange,
4065 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
4067 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global
4068 /// scope or nested-name-specifier) is parsed, part of a declarator-id.
4069 /// After this method is called, according to [C++ 3.4.3p3], names should be
4070 /// looked up in the declarator-id's scope, until the declarator is parsed and
4071 /// ActOnCXXExitDeclaratorScope is called.
4072 /// The 'SS' should be a non-empty valid CXXScopeSpec.
4073 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS);
4075 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously
4076 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same
4077 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well.
4078 /// Used to indicate that names should revert to being looked up in the
4080 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
4082 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an
4083 /// initializer for the declaration 'Dcl'.
4084 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a
4085 /// static data member of class X, names should be looked up in the scope of
4087 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl);
4089 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an
4090 /// initializer for the declaration 'Dcl'.
4091 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl);
4093 /// \brief Create a new lambda closure type.
4094 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange,
4095 TypeSourceInfo *Info,
4096 bool KnownDependent);
4098 /// \brief Start the definition of a lambda expression.
4099 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class,
4100 SourceRange IntroducerRange,
4101 TypeSourceInfo *MethodType,
4102 SourceLocation EndLoc,
4103 llvm::ArrayRef<ParmVarDecl *> Params);
4105 /// \brief Introduce the scope for a lambda expression.
4106 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator,
4107 SourceRange IntroducerRange,
4108 LambdaCaptureDefault CaptureDefault,
4109 bool ExplicitParams,
4110 bool ExplicitResultType,
4113 /// \brief Note that we have finished the explicit captures for the
4115 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI);
4117 /// \brief Introduce the lambda parameters into scope.
4118 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope);
4120 /// \brief Deduce a block or lambda's return type based on the return
4121 /// statements present in the body.
4122 void deduceClosureReturnType(sema::CapturingScopeInfo &CSI);
4124 /// ActOnStartOfLambdaDefinition - This is called just before we start
4125 /// parsing the body of a lambda; it analyzes the explicit captures and
4126 /// arguments, and sets up various data-structures for the body of the
4128 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
4129 Declarator &ParamInfo, Scope *CurScope);
4131 /// ActOnLambdaError - If there is an error parsing a lambda, this callback
4132 /// is invoked to pop the information about the lambda.
4133 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
4134 bool IsInstantiation = false);
4136 /// ActOnLambdaExpr - This is called when the body of a lambda expression
4137 /// was successfully completed.
4138 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
4140 bool IsInstantiation = false);
4142 /// \brief Define the "body" of the conversion from a lambda object to a
4143 /// function pointer.
4145 /// This routine doesn't actually define a sensible body; rather, it fills
4146 /// in the initialization expression needed to copy the lambda object into
4147 /// the block, and IR generation actually generates the real body of the
4148 /// block pointer conversion.
4149 void DefineImplicitLambdaToFunctionPointerConversion(
4150 SourceLocation CurrentLoc, CXXConversionDecl *Conv);
4152 /// \brief Define the "body" of the conversion from a lambda object to a
4155 /// This routine doesn't actually define a sensible body; rather, it fills
4156 /// in the initialization expression needed to copy the lambda object into
4157 /// the block, and IR generation actually generates the real body of the
4158 /// block pointer conversion.
4159 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc,
4160 CXXConversionDecl *Conv);
4162 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation,
4163 SourceLocation ConvLocation,
4164 CXXConversionDecl *Conv,
4167 // ParseObjCStringLiteral - Parse Objective-C string literals.
4168 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
4170 unsigned NumStrings);
4172 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S);
4174 /// BuildObjCNumericLiteral - builds an ObjCBoxedExpr AST node for the
4175 /// numeric literal expression. Type of the expression will be "NSNumber *"
4176 /// or "id" if NSNumber is unavailable.
4177 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number);
4178 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc,
4180 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements);
4182 /// BuildObjCBoxedExpr - builds an ObjCBoxedExpr AST node for the
4183 /// '@' prefixed parenthesized expression. The type of the expression will
4184 /// either be "NSNumber *" or "NSString *" depending on the type of
4185 /// ValueType, which is allowed to be a built-in numeric type or
4186 /// "char *" or "const char *".
4187 ExprResult BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr);
4189 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr,
4191 ObjCMethodDecl *getterMethod,
4192 ObjCMethodDecl *setterMethod);
4194 ExprResult BuildObjCDictionaryLiteral(SourceRange SR,
4195 ObjCDictionaryElement *Elements,
4196 unsigned NumElements);
4198 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc,
4199 TypeSourceInfo *EncodedTypeInfo,
4200 SourceLocation RParenLoc);
4201 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl,
4202 CXXConversionDecl *Method,
4203 bool HadMultipleCandidates);
4205 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc,
4206 SourceLocation EncodeLoc,
4207 SourceLocation LParenLoc,
4209 SourceLocation RParenLoc);
4211 /// ParseObjCSelectorExpression - Build selector expression for \@selector
4212 ExprResult ParseObjCSelectorExpression(Selector Sel,
4213 SourceLocation AtLoc,
4214 SourceLocation SelLoc,
4215 SourceLocation LParenLoc,
4216 SourceLocation RParenLoc);
4218 /// ParseObjCProtocolExpression - Build protocol expression for \@protocol
4219 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName,
4220 SourceLocation AtLoc,
4221 SourceLocation ProtoLoc,
4222 SourceLocation LParenLoc,
4223 SourceLocation ProtoIdLoc,
4224 SourceLocation RParenLoc);
4226 //===--------------------------------------------------------------------===//
4229 Decl *ActOnStartLinkageSpecification(Scope *S,
4230 SourceLocation ExternLoc,
4231 SourceLocation LangLoc,
4233 SourceLocation LBraceLoc);
4234 Decl *ActOnFinishLinkageSpecification(Scope *S,
4236 SourceLocation RBraceLoc);
4239 //===--------------------------------------------------------------------===//
4242 bool isCurrentClassName(const IdentifierInfo &II, Scope *S,
4243 const CXXScopeSpec *SS = 0);
4245 bool ActOnAccessSpecifier(AccessSpecifier Access,
4246 SourceLocation ASLoc,
4247 SourceLocation ColonLoc,
4248 AttributeList *Attrs = 0);
4250 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
4252 MultiTemplateParamsArg TemplateParameterLists,
4253 Expr *BitfieldWidth, const VirtSpecifiers &VS,
4254 InClassInitStyle InitStyle);
4255 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc,
4258 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
4261 IdentifierInfo *MemberOrBase,
4262 ParsedType TemplateTypeTy,
4264 SourceLocation IdLoc,
4265 SourceLocation LParenLoc,
4266 Expr **Args, unsigned NumArgs,
4267 SourceLocation RParenLoc,
4268 SourceLocation EllipsisLoc);
4270 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
4273 IdentifierInfo *MemberOrBase,
4274 ParsedType TemplateTypeTy,
4276 SourceLocation IdLoc,
4278 SourceLocation EllipsisLoc);
4280 MemInitResult BuildMemInitializer(Decl *ConstructorD,
4283 IdentifierInfo *MemberOrBase,
4284 ParsedType TemplateTypeTy,
4286 SourceLocation IdLoc,
4288 SourceLocation EllipsisLoc);
4290 MemInitResult BuildMemberInitializer(ValueDecl *Member,
4292 SourceLocation IdLoc);
4294 MemInitResult BuildBaseInitializer(QualType BaseType,
4295 TypeSourceInfo *BaseTInfo,
4297 CXXRecordDecl *ClassDecl,
4298 SourceLocation EllipsisLoc);
4300 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo,
4302 CXXRecordDecl *ClassDecl);
4304 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor,
4305 CXXCtorInitializer *Initializer);
4307 bool SetCtorInitializers(CXXConstructorDecl *Constructor,
4308 CXXCtorInitializer **Initializers,
4309 unsigned NumInitializers, bool AnyErrors);
4311 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation);
4314 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl,
4315 /// mark all the non-trivial destructors of its members and bases as
4317 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc,
4318 CXXRecordDecl *Record);
4320 /// \brief The list of classes whose vtables have been used within
4321 /// this translation unit, and the source locations at which the
4322 /// first use occurred.
4323 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse;
4325 /// \brief The list of vtables that are required but have not yet been
4327 SmallVector<VTableUse, 16> VTableUses;
4329 /// \brief The set of classes whose vtables have been used within
4330 /// this translation unit, and a bit that will be true if the vtable is
4331 /// required to be emitted (otherwise, it should be emitted only if needed
4332 /// by code generation).
4333 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed;
4335 /// \brief Load any externally-stored vtable uses.
4336 void LoadExternalVTableUses();
4338 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource,
4339 &ExternalSemaSource::ReadDynamicClasses, 2, 2>
4342 /// \brief A list of all of the dynamic classes in this translation
4344 DynamicClassesType DynamicClasses;
4346 /// \brief Note that the vtable for the given class was used at the
4348 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class,
4349 bool DefinitionRequired = false);
4351 /// \brief Mark the exception specifications of all virtual member functions
4352 /// in the given class as needed.
4353 void MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc,
4354 const CXXRecordDecl *RD);
4356 /// MarkVirtualMembersReferenced - Will mark all members of the given
4357 /// CXXRecordDecl referenced.
4358 void MarkVirtualMembersReferenced(SourceLocation Loc,
4359 const CXXRecordDecl *RD);
4361 /// \brief Define all of the vtables that have been used in this
4362 /// translation unit and reference any virtual members used by those
4365 /// \returns true if any work was done, false otherwise.
4366 bool DefineUsedVTables();
4368 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl);
4370 void ActOnMemInitializers(Decl *ConstructorDecl,
4371 SourceLocation ColonLoc,
4372 CXXCtorInitializer **MemInits,
4373 unsigned NumMemInits,
4376 void CheckCompletedCXXClass(CXXRecordDecl *Record);
4377 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc,
4379 SourceLocation LBrac,
4380 SourceLocation RBrac,
4381 AttributeList *AttrList);
4382 void ActOnFinishCXXMemberDecls();
4384 void ActOnReenterTemplateScope(Scope *S, Decl *Template);
4385 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D);
4386 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record);
4387 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4388 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param);
4389 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record);
4390 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4391 void ActOnFinishDelayedMemberInitializers(Decl *Record);
4392 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true);
4393 bool IsInsideALocalClassWithinATemplateFunction();
4395 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc,
4397 Expr *AssertMessageExpr,
4398 SourceLocation RParenLoc);
4399 Decl *BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc,
4401 StringLiteral *AssertMessageExpr,
4402 SourceLocation RParenLoc,
4405 FriendDecl *CheckFriendTypeDecl(SourceLocation LocStart,
4406 SourceLocation FriendLoc,
4407 TypeSourceInfo *TSInfo);
4408 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
4409 MultiTemplateParamsArg TemplateParams);
4410 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
4411 MultiTemplateParamsArg TemplateParams);
4413 QualType CheckConstructorDeclarator(Declarator &D, QualType R,
4415 void CheckConstructor(CXXConstructorDecl *Constructor);
4416 QualType CheckDestructorDeclarator(Declarator &D, QualType R,
4418 bool CheckDestructor(CXXDestructorDecl *Destructor);
4419 void CheckConversionDeclarator(Declarator &D, QualType &R,
4421 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion);
4423 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record);
4424 void CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD);
4426 //===--------------------------------------------------------------------===//
4427 // C++ Derived Classes
4430 /// ActOnBaseSpecifier - Parsed a base specifier
4431 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class,
4432 SourceRange SpecifierRange,
4433 bool Virtual, AccessSpecifier Access,
4434 TypeSourceInfo *TInfo,
4435 SourceLocation EllipsisLoc);
4437 BaseResult ActOnBaseSpecifier(Decl *classdecl,
4438 SourceRange SpecifierRange,
4439 bool Virtual, AccessSpecifier Access,
4440 ParsedType basetype,
4441 SourceLocation BaseLoc,
4442 SourceLocation EllipsisLoc);
4444 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases,
4446 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases,
4449 bool IsDerivedFrom(QualType Derived, QualType Base);
4450 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths);
4452 // FIXME: I don't like this name.
4453 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath);
4455 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath);
4457 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4458 SourceLocation Loc, SourceRange Range,
4459 CXXCastPath *BasePath = 0,
4460 bool IgnoreAccess = false);
4461 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4462 unsigned InaccessibleBaseID,
4463 unsigned AmbigiousBaseConvID,
4464 SourceLocation Loc, SourceRange Range,
4465 DeclarationName Name,
4466 CXXCastPath *BasePath);
4468 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths);
4470 /// CheckOverridingFunctionReturnType - Checks whether the return types are
4471 /// covariant, according to C++ [class.virtual]p5.
4472 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
4473 const CXXMethodDecl *Old);
4475 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception
4476 /// spec is a subset of base spec.
4477 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New,
4478 const CXXMethodDecl *Old);
4480 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange);
4482 /// CheckOverrideControl - Check C++11 override control semantics.
4483 void CheckOverrideControl(Decl *D);
4485 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function
4486 /// overrides a virtual member function marked 'final', according to
4487 /// C++11 [class.virtual]p4.
4488 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New,
4489 const CXXMethodDecl *Old);
4492 //===--------------------------------------------------------------------===//
4493 // C++ Access Control
4503 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl,
4504 NamedDecl *PrevMemberDecl,
4505 AccessSpecifier LexicalAS);
4507 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E,
4508 DeclAccessPair FoundDecl);
4509 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E,
4510 DeclAccessPair FoundDecl);
4511 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc,
4512 SourceRange PlacementRange,
4513 CXXRecordDecl *NamingClass,
4514 DeclAccessPair FoundDecl,
4515 bool Diagnose = true);
4516 AccessResult CheckConstructorAccess(SourceLocation Loc,
4517 CXXConstructorDecl *D,
4518 const InitializedEntity &Entity,
4519 AccessSpecifier Access,
4520 bool IsCopyBindingRefToTemp = false);
4521 AccessResult CheckConstructorAccess(SourceLocation Loc,
4522 CXXConstructorDecl *D,
4523 const InitializedEntity &Entity,
4524 AccessSpecifier Access,
4525 const PartialDiagnostic &PDiag);
4526 AccessResult CheckDestructorAccess(SourceLocation Loc,
4527 CXXDestructorDecl *Dtor,
4528 const PartialDiagnostic &PDiag,
4529 QualType objectType = QualType());
4530 AccessResult CheckFriendAccess(NamedDecl *D);
4531 AccessResult CheckMemberOperatorAccess(SourceLocation Loc,
4534 DeclAccessPair FoundDecl);
4535 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr,
4536 DeclAccessPair FoundDecl);
4537 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc,
4538 QualType Base, QualType Derived,
4539 const CXXBasePath &Path,
4541 bool ForceCheck = false,
4542 bool ForceUnprivileged = false);
4543 void CheckLookupAccess(const LookupResult &R);
4544 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx);
4545 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl,
4546 AccessSpecifier access,
4547 QualType objectType);
4549 void HandleDependentAccessCheck(const DependentDiagnostic &DD,
4550 const MultiLevelTemplateArgumentList &TemplateArgs);
4551 void PerformDependentDiagnostics(const DeclContext *Pattern,
4552 const MultiLevelTemplateArgumentList &TemplateArgs);
4554 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
4556 /// \brief When true, access checking violations are treated as SFINAE
4557 /// failures rather than hard errors.
4558 bool AccessCheckingSFINAE;
4560 enum AbstractDiagSelID {
4564 AbstractVariableType,
4570 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4571 TypeDiagnoser &Diagnoser);
4572 template<typename T1>
4573 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4576 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1);
4577 return RequireNonAbstractType(Loc, T, Diagnoser);
4580 template<typename T1, typename T2>
4581 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4583 const T1 &Arg1, const T2 &Arg2) {
4584 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2);
4585 return RequireNonAbstractType(Loc, T, Diagnoser);
4588 template<typename T1, typename T2, typename T3>
4589 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4591 const T1 &Arg1, const T2 &Arg2, const T3 &Arg3) {
4592 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, Arg3);
4593 return RequireNonAbstractType(Loc, T, Diagnoser);
4596 void DiagnoseAbstractType(const CXXRecordDecl *RD);
4598 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID,
4599 AbstractDiagSelID SelID = AbstractNone);
4601 //===--------------------------------------------------------------------===//
4602 // C++ Overloaded Operators [C++ 13.5]
4605 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl);
4607 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl);
4609 //===--------------------------------------------------------------------===//
4610 // C++ Templates [C++ 14]
4612 void FilterAcceptableTemplateNames(LookupResult &R,
4613 bool AllowFunctionTemplates = true);
4614 bool hasAnyAcceptableTemplateNames(LookupResult &R,
4615 bool AllowFunctionTemplates = true);
4617 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS,
4618 QualType ObjectType, bool EnteringContext,
4619 bool &MemberOfUnknownSpecialization);
4621 TemplateNameKind isTemplateName(Scope *S,
4623 bool hasTemplateKeyword,
4624 UnqualifiedId &Name,
4625 ParsedType ObjectType,
4626 bool EnteringContext,
4627 TemplateTy &Template,
4628 bool &MemberOfUnknownSpecialization);
4630 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II,
4631 SourceLocation IILoc,
4633 const CXXScopeSpec *SS,
4634 TemplateTy &SuggestedTemplate,
4635 TemplateNameKind &SuggestedKind);
4637 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl);
4638 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl);
4640 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis,
4641 SourceLocation EllipsisLoc,
4642 SourceLocation KeyLoc,
4643 IdentifierInfo *ParamName,
4644 SourceLocation ParamNameLoc,
4645 unsigned Depth, unsigned Position,
4646 SourceLocation EqualLoc,
4647 ParsedType DefaultArg);
4649 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc);
4650 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D,
4653 SourceLocation EqualLoc,
4655 Decl *ActOnTemplateTemplateParameter(Scope *S,
4656 SourceLocation TmpLoc,
4657 TemplateParameterList *Params,
4658 SourceLocation EllipsisLoc,
4659 IdentifierInfo *ParamName,
4660 SourceLocation ParamNameLoc,
4663 SourceLocation EqualLoc,
4664 ParsedTemplateArgument DefaultArg);
4666 TemplateParameterList *
4667 ActOnTemplateParameterList(unsigned Depth,
4668 SourceLocation ExportLoc,
4669 SourceLocation TemplateLoc,
4670 SourceLocation LAngleLoc,
4671 Decl **Params, unsigned NumParams,
4672 SourceLocation RAngleLoc);
4674 /// \brief The context in which we are checking a template parameter
4676 enum TemplateParamListContext {
4678 TPC_FunctionTemplate,
4679 TPC_ClassTemplateMember,
4680 TPC_FriendFunctionTemplate,
4681 TPC_FriendFunctionTemplateDefinition,
4682 TPC_TypeAliasTemplate
4685 bool CheckTemplateParameterList(TemplateParameterList *NewParams,
4686 TemplateParameterList *OldParams,
4687 TemplateParamListContext TPC);
4688 TemplateParameterList *
4689 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc,
4690 SourceLocation DeclLoc,
4691 const CXXScopeSpec &SS,
4692 TemplateParameterList **ParamLists,
4693 unsigned NumParamLists,
4695 bool &IsExplicitSpecialization,
4698 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
4699 SourceLocation KWLoc, CXXScopeSpec &SS,
4700 IdentifierInfo *Name, SourceLocation NameLoc,
4701 AttributeList *Attr,
4702 TemplateParameterList *TemplateParams,
4704 SourceLocation ModulePrivateLoc,
4705 unsigned NumOuterTemplateParamLists,
4706 TemplateParameterList **OuterTemplateParamLists);
4708 void translateTemplateArguments(const ASTTemplateArgsPtr &In,
4709 TemplateArgumentListInfo &Out);
4711 void NoteAllFoundTemplates(TemplateName Name);
4713 QualType CheckTemplateIdType(TemplateName Template,
4714 SourceLocation TemplateLoc,
4715 TemplateArgumentListInfo &TemplateArgs);
4718 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4719 TemplateTy Template, SourceLocation TemplateLoc,
4720 SourceLocation LAngleLoc,
4721 ASTTemplateArgsPtr TemplateArgs,
4722 SourceLocation RAngleLoc,
4723 bool IsCtorOrDtorName = false);
4725 /// \brief Parsed an elaborated-type-specifier that refers to a template-id,
4726 /// such as \c class T::template apply<U>.
4727 TypeResult ActOnTagTemplateIdType(TagUseKind TUK,
4728 TypeSpecifierType TagSpec,
4729 SourceLocation TagLoc,
4731 SourceLocation TemplateKWLoc,
4732 TemplateTy TemplateD,
4733 SourceLocation TemplateLoc,
4734 SourceLocation LAngleLoc,
4735 ASTTemplateArgsPtr TemplateArgsIn,
4736 SourceLocation RAngleLoc);
4739 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS,
4740 SourceLocation TemplateKWLoc,
4743 const TemplateArgumentListInfo *TemplateArgs);
4745 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS,
4746 SourceLocation TemplateKWLoc,
4747 const DeclarationNameInfo &NameInfo,
4748 const TemplateArgumentListInfo *TemplateArgs);
4750 TemplateNameKind ActOnDependentTemplateName(Scope *S,
4752 SourceLocation TemplateKWLoc,
4753 UnqualifiedId &Name,
4754 ParsedType ObjectType,
4755 bool EnteringContext,
4756 TemplateTy &Template);
4759 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK,
4760 SourceLocation KWLoc,
4761 SourceLocation ModulePrivateLoc,
4763 TemplateTy Template,
4764 SourceLocation TemplateNameLoc,
4765 SourceLocation LAngleLoc,
4766 ASTTemplateArgsPtr TemplateArgs,
4767 SourceLocation RAngleLoc,
4768 AttributeList *Attr,
4769 MultiTemplateParamsArg TemplateParameterLists);
4771 Decl *ActOnTemplateDeclarator(Scope *S,
4772 MultiTemplateParamsArg TemplateParameterLists,
4775 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope,
4776 MultiTemplateParamsArg TemplateParameterLists,
4780 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc,
4781 TemplateSpecializationKind NewTSK,
4782 NamedDecl *PrevDecl,
4783 TemplateSpecializationKind PrevTSK,
4784 SourceLocation PrevPtOfInstantiation,
4787 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD,
4788 const TemplateArgumentListInfo &ExplicitTemplateArgs,
4789 LookupResult &Previous);
4791 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD,
4792 TemplateArgumentListInfo *ExplicitTemplateArgs,
4793 LookupResult &Previous);
4794 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous);
4797 ActOnExplicitInstantiation(Scope *S,
4798 SourceLocation ExternLoc,
4799 SourceLocation TemplateLoc,
4801 SourceLocation KWLoc,
4802 const CXXScopeSpec &SS,
4803 TemplateTy Template,
4804 SourceLocation TemplateNameLoc,
4805 SourceLocation LAngleLoc,
4806 ASTTemplateArgsPtr TemplateArgs,
4807 SourceLocation RAngleLoc,
4808 AttributeList *Attr);
4811 ActOnExplicitInstantiation(Scope *S,
4812 SourceLocation ExternLoc,
4813 SourceLocation TemplateLoc,
4815 SourceLocation KWLoc,
4817 IdentifierInfo *Name,
4818 SourceLocation NameLoc,
4819 AttributeList *Attr);
4821 DeclResult ActOnExplicitInstantiation(Scope *S,
4822 SourceLocation ExternLoc,
4823 SourceLocation TemplateLoc,
4827 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
4828 SourceLocation TemplateLoc,
4829 SourceLocation RAngleLoc,
4831 SmallVectorImpl<TemplateArgument> &Converted);
4833 /// \brief Specifies the context in which a particular template
4834 /// argument is being checked.
4835 enum CheckTemplateArgumentKind {
4836 /// \brief The template argument was specified in the code or was
4837 /// instantiated with some deduced template arguments.
4840 /// \brief The template argument was deduced via template argument
4844 /// \brief The template argument was deduced from an array bound
4845 /// via template argument deduction.
4846 CTAK_DeducedFromArrayBound
4849 bool CheckTemplateArgument(NamedDecl *Param,
4850 const TemplateArgumentLoc &Arg,
4851 NamedDecl *Template,
4852 SourceLocation TemplateLoc,
4853 SourceLocation RAngleLoc,
4854 unsigned ArgumentPackIndex,
4855 SmallVectorImpl<TemplateArgument> &Converted,
4856 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4858 /// \brief Check that the given template arguments can be be provided to
4859 /// the given template, converting the arguments along the way.
4861 /// \param Template The template to which the template arguments are being
4864 /// \param TemplateLoc The location of the template name in the source.
4866 /// \param TemplateArgs The list of template arguments. If the template is
4867 /// a template template parameter, this function may extend the set of
4868 /// template arguments to also include substituted, defaulted template
4871 /// \param PartialTemplateArgs True if the list of template arguments is
4872 /// intentionally partial, e.g., because we're checking just the initial
4873 /// set of template arguments.
4875 /// \param Converted Will receive the converted, canonicalized template
4879 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate
4880 /// when the template arguments contain a pack expansion that is being
4881 /// expanded into a fixed parameter list.
4883 /// \returns True if an error occurred, false otherwise.
4884 bool CheckTemplateArgumentList(TemplateDecl *Template,
4885 SourceLocation TemplateLoc,
4886 TemplateArgumentListInfo &TemplateArgs,
4887 bool PartialTemplateArgs,
4888 SmallVectorImpl<TemplateArgument> &Converted,
4889 bool *ExpansionIntoFixedList = 0);
4891 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param,
4892 const TemplateArgumentLoc &Arg,
4893 SmallVectorImpl<TemplateArgument> &Converted);
4895 bool CheckTemplateArgument(TemplateTypeParmDecl *Param,
4896 TypeSourceInfo *Arg);
4897 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
4898 QualType InstantiatedParamType, Expr *Arg,
4899 TemplateArgument &Converted,
4900 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4901 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param,
4902 const TemplateArgumentLoc &Arg,
4903 unsigned ArgumentPackIndex);
4906 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
4908 SourceLocation Loc);
4910 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
4911 SourceLocation Loc);
4913 /// \brief Enumeration describing how template parameter lists are compared
4915 enum TemplateParameterListEqualKind {
4916 /// \brief We are matching the template parameter lists of two templates
4917 /// that might be redeclarations.
4920 /// template<typename T> struct X;
4921 /// template<typename T> struct X;
4925 /// \brief We are matching the template parameter lists of two template
4926 /// template parameters as part of matching the template parameter lists
4927 /// of two templates that might be redeclarations.
4930 /// template<template<int I> class TT> struct X;
4931 /// template<template<int Value> class Other> struct X;
4933 TPL_TemplateTemplateParmMatch,
4935 /// \brief We are matching the template parameter lists of a template
4936 /// template argument against the template parameter lists of a template
4937 /// template parameter.
4940 /// template<template<int Value> class Metafun> struct X;
4941 /// template<int Value> struct integer_c;
4942 /// X<integer_c> xic;
4944 TPL_TemplateTemplateArgumentMatch
4947 bool TemplateParameterListsAreEqual(TemplateParameterList *New,
4948 TemplateParameterList *Old,
4950 TemplateParameterListEqualKind Kind,
4951 SourceLocation TemplateArgLoc
4952 = SourceLocation());
4954 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams);
4956 /// \brief Called when the parser has parsed a C++ typename
4957 /// specifier, e.g., "typename T::type".
4959 /// \param S The scope in which this typename type occurs.
4960 /// \param TypenameLoc the location of the 'typename' keyword
4961 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4962 /// \param II the identifier we're retrieving (e.g., 'type' in the example).
4963 /// \param IdLoc the location of the identifier.
4965 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4966 const CXXScopeSpec &SS, const IdentifierInfo &II,
4967 SourceLocation IdLoc);
4969 /// \brief Called when the parser has parsed a C++ typename
4970 /// specifier that ends in a template-id, e.g.,
4971 /// "typename MetaFun::template apply<T1, T2>".
4973 /// \param S The scope in which this typename type occurs.
4974 /// \param TypenameLoc the location of the 'typename' keyword
4975 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4976 /// \param TemplateLoc the location of the 'template' keyword, if any.
4977 /// \param TemplateName The template name.
4978 /// \param TemplateNameLoc The location of the template name.
4979 /// \param LAngleLoc The location of the opening angle bracket ('<').
4980 /// \param TemplateArgs The template arguments.
4981 /// \param RAngleLoc The location of the closing angle bracket ('>').
4983 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4984 const CXXScopeSpec &SS,
4985 SourceLocation TemplateLoc,
4986 TemplateTy TemplateName,
4987 SourceLocation TemplateNameLoc,
4988 SourceLocation LAngleLoc,
4989 ASTTemplateArgsPtr TemplateArgs,
4990 SourceLocation RAngleLoc);
4992 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword,
4993 SourceLocation KeywordLoc,
4994 NestedNameSpecifierLoc QualifierLoc,
4995 const IdentifierInfo &II,
4996 SourceLocation IILoc);
4998 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T,
5000 DeclarationName Name);
5001 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS);
5003 ExprResult RebuildExprInCurrentInstantiation(Expr *E);
5004 bool RebuildTemplateParamsInCurrentInstantiation(
5005 TemplateParameterList *Params);
5008 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
5009 const TemplateArgumentList &Args);
5012 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
5013 const TemplateArgument *Args,
5016 //===--------------------------------------------------------------------===//
5017 // C++ Variadic Templates (C++0x [temp.variadic])
5018 //===--------------------------------------------------------------------===//
5020 /// \brief The context in which an unexpanded parameter pack is
5021 /// being diagnosed.
5023 /// Note that the values of this enumeration line up with the first
5024 /// argument to the \c err_unexpanded_parameter_pack diagnostic.
5025 enum UnexpandedParameterPackContext {
5026 /// \brief An arbitrary expression.
5027 UPPC_Expression = 0,
5029 /// \brief The base type of a class type.
5032 /// \brief The type of an arbitrary declaration.
5033 UPPC_DeclarationType,
5035 /// \brief The type of a data member.
5036 UPPC_DataMemberType,
5038 /// \brief The size of a bit-field.
5041 /// \brief The expression in a static assertion.
5042 UPPC_StaticAssertExpression,
5044 /// \brief The fixed underlying type of an enumeration.
5045 UPPC_FixedUnderlyingType,
5047 /// \brief The enumerator value.
5048 UPPC_EnumeratorValue,
5050 /// \brief A using declaration.
5051 UPPC_UsingDeclaration,
5053 /// \brief A friend declaration.
5054 UPPC_FriendDeclaration,
5056 /// \brief A declaration qualifier.
5057 UPPC_DeclarationQualifier,
5059 /// \brief An initializer.
5062 /// \brief A default argument.
5063 UPPC_DefaultArgument,
5065 /// \brief The type of a non-type template parameter.
5066 UPPC_NonTypeTemplateParameterType,
5068 /// \brief The type of an exception.
5071 /// \brief Partial specialization.
5072 UPPC_PartialSpecialization,
5074 /// \brief Microsoft __if_exists.
5077 /// \brief Microsoft __if_not_exists.
5080 /// \brief Lambda expression.
5083 /// \brief Block expression,
5087 /// \brief Diagnose unexpanded parameter packs.
5089 /// \param Loc The location at which we should emit the diagnostic.
5091 /// \param UPPC The context in which we are diagnosing unexpanded
5092 /// parameter packs.
5094 /// \param Unexpanded the set of unexpanded parameter packs.
5096 /// \returns true if an error occurred, false otherwise.
5097 bool DiagnoseUnexpandedParameterPacks(SourceLocation Loc,
5098 UnexpandedParameterPackContext UPPC,
5099 ArrayRef<UnexpandedParameterPack> Unexpanded);
5101 /// \brief If the given type contains an unexpanded parameter pack,
5102 /// diagnose the error.
5104 /// \param Loc The source location where a diagnostc should be emitted.
5106 /// \param T The type that is being checked for unexpanded parameter
5109 /// \returns true if an error occurred, false otherwise.
5110 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T,
5111 UnexpandedParameterPackContext UPPC);
5113 /// \brief If the given expression contains an unexpanded parameter
5114 /// pack, diagnose the error.
5116 /// \param E The expression that is being checked for unexpanded
5117 /// parameter packs.
5119 /// \returns true if an error occurred, false otherwise.
5120 bool DiagnoseUnexpandedParameterPack(Expr *E,
5121 UnexpandedParameterPackContext UPPC = UPPC_Expression);
5123 /// \brief If the given nested-name-specifier contains an unexpanded
5124 /// parameter pack, diagnose the error.
5126 /// \param SS The nested-name-specifier that is being checked for
5127 /// unexpanded parameter packs.
5129 /// \returns true if an error occurred, false otherwise.
5130 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS,
5131 UnexpandedParameterPackContext UPPC);
5133 /// \brief If the given name contains an unexpanded parameter pack,
5134 /// diagnose the error.
5136 /// \param NameInfo The name (with source location information) that
5137 /// is being checked for unexpanded parameter packs.
5139 /// \returns true if an error occurred, false otherwise.
5140 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo,
5141 UnexpandedParameterPackContext UPPC);
5143 /// \brief If the given template name contains an unexpanded parameter pack,
5144 /// diagnose the error.
5146 /// \param Loc The location of the template name.
5148 /// \param Template The template name that is being checked for unexpanded
5149 /// parameter packs.
5151 /// \returns true if an error occurred, false otherwise.
5152 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc,
5153 TemplateName Template,
5154 UnexpandedParameterPackContext UPPC);
5156 /// \brief If the given template argument contains an unexpanded parameter
5157 /// pack, diagnose the error.
5159 /// \param Arg The template argument that is being checked for unexpanded
5160 /// parameter packs.
5162 /// \returns true if an error occurred, false otherwise.
5163 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg,
5164 UnexpandedParameterPackContext UPPC);
5166 /// \brief Collect the set of unexpanded parameter packs within the given
5167 /// template argument.
5169 /// \param Arg The template argument that will be traversed to find
5170 /// unexpanded parameter packs.
5171 void collectUnexpandedParameterPacks(TemplateArgument Arg,
5172 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5174 /// \brief Collect the set of unexpanded parameter packs within the given
5175 /// template argument.
5177 /// \param Arg The template argument that will be traversed to find
5178 /// unexpanded parameter packs.
5179 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg,
5180 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5182 /// \brief Collect the set of unexpanded parameter packs within the given
5185 /// \param T The type that will be traversed to find
5186 /// unexpanded parameter packs.
5187 void collectUnexpandedParameterPacks(QualType T,
5188 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5190 /// \brief Collect the set of unexpanded parameter packs within the given
5193 /// \param TL The type that will be traversed to find
5194 /// unexpanded parameter packs.
5195 void collectUnexpandedParameterPacks(TypeLoc TL,
5196 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5198 /// \brief Collect the set of unexpanded parameter packs within the given
5199 /// nested-name-specifier.
5201 /// \param SS The nested-name-specifier that will be traversed to find
5202 /// unexpanded parameter packs.
5203 void collectUnexpandedParameterPacks(CXXScopeSpec &SS,
5204 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5206 /// \brief Collect the set of unexpanded parameter packs within the given
5209 /// \param NameInfo The name that will be traversed to find
5210 /// unexpanded parameter packs.
5211 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo,
5212 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
5214 /// \brief Invoked when parsing a template argument followed by an
5215 /// ellipsis, which creates a pack expansion.
5217 /// \param Arg The template argument preceding the ellipsis, which
5218 /// may already be invalid.
5220 /// \param EllipsisLoc The location of the ellipsis.
5221 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg,
5222 SourceLocation EllipsisLoc);
5224 /// \brief Invoked when parsing a type followed by an ellipsis, which
5225 /// creates a pack expansion.
5227 /// \param Type The type preceding the ellipsis, which will become
5228 /// the pattern of the pack expansion.
5230 /// \param EllipsisLoc The location of the ellipsis.
5231 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc);
5233 /// \brief Construct a pack expansion type from the pattern of the pack
5235 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern,
5236 SourceLocation EllipsisLoc,
5237 llvm::Optional<unsigned> NumExpansions);
5239 /// \brief Construct a pack expansion type from the pattern of the pack
5241 QualType CheckPackExpansion(QualType Pattern,
5242 SourceRange PatternRange,
5243 SourceLocation EllipsisLoc,
5244 llvm::Optional<unsigned> NumExpansions);
5246 /// \brief Invoked when parsing an expression followed by an ellipsis, which
5247 /// creates a pack expansion.
5249 /// \param Pattern The expression preceding the ellipsis, which will become
5250 /// the pattern of the pack expansion.
5252 /// \param EllipsisLoc The location of the ellipsis.
5253 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc);
5255 /// \brief Invoked when parsing an expression followed by an ellipsis, which
5256 /// creates a pack expansion.
5258 /// \param Pattern The expression preceding the ellipsis, which will become
5259 /// the pattern of the pack expansion.
5261 /// \param EllipsisLoc The location of the ellipsis.
5262 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc,
5263 llvm::Optional<unsigned> NumExpansions);
5265 /// \brief Determine whether we could expand a pack expansion with the
5266 /// given set of parameter packs into separate arguments by repeatedly
5267 /// transforming the pattern.
5269 /// \param EllipsisLoc The location of the ellipsis that identifies the
5272 /// \param PatternRange The source range that covers the entire pattern of
5273 /// the pack expansion.
5275 /// \param Unexpanded The set of unexpanded parameter packs within the
5278 /// \param ShouldExpand Will be set to \c true if the transformer should
5279 /// expand the corresponding pack expansions into separate arguments. When
5280 /// set, \c NumExpansions must also be set.
5282 /// \param RetainExpansion Whether the caller should add an unexpanded
5283 /// pack expansion after all of the expanded arguments. This is used
5284 /// when extending explicitly-specified template argument packs per
5285 /// C++0x [temp.arg.explicit]p9.
5287 /// \param NumExpansions The number of separate arguments that will be in
5288 /// the expanded form of the corresponding pack expansion. This is both an
5289 /// input and an output parameter, which can be set by the caller if the
5290 /// number of expansions is known a priori (e.g., due to a prior substitution)
5291 /// and will be set by the callee when the number of expansions is known.
5292 /// The callee must set this value when \c ShouldExpand is \c true; it may
5293 /// set this value in other cases.
5295 /// \returns true if an error occurred (e.g., because the parameter packs
5296 /// are to be instantiated with arguments of different lengths), false
5297 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
5299 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc,
5300 SourceRange PatternRange,
5301 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded,
5302 const MultiLevelTemplateArgumentList &TemplateArgs,
5304 bool &RetainExpansion,
5305 llvm::Optional<unsigned> &NumExpansions);
5307 /// \brief Determine the number of arguments in the given pack expansion
5310 /// This routine assumes that the number of arguments in the expansion is
5311 /// consistent across all of the unexpanded parameter packs in its pattern.
5313 /// Returns an empty Optional if the type can't be expanded.
5314 llvm::Optional<unsigned> getNumArgumentsInExpansion(QualType T,
5315 const MultiLevelTemplateArgumentList &TemplateArgs);
5317 /// \brief Determine whether the given declarator contains any unexpanded
5318 /// parameter packs.
5320 /// This routine is used by the parser to disambiguate function declarators
5321 /// with an ellipsis prior to the ')', e.g.,
5327 /// To determine whether we have an (unnamed) function parameter pack or
5328 /// a variadic function.
5330 /// \returns true if the declarator contains any unexpanded parameter packs,
5331 /// false otherwise.
5332 bool containsUnexpandedParameterPacks(Declarator &D);
5334 //===--------------------------------------------------------------------===//
5335 // C++ Template Argument Deduction (C++ [temp.deduct])
5336 //===--------------------------------------------------------------------===//
5338 /// \brief Describes the result of template argument deduction.
5340 /// The TemplateDeductionResult enumeration describes the result of
5341 /// template argument deduction, as returned from
5342 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo
5343 /// structure provides additional information about the results of
5344 /// template argument deduction, e.g., the deduced template argument
5345 /// list (if successful) or the specific template parameters or
5346 /// deduced arguments that were involved in the failure.
5347 enum TemplateDeductionResult {
5348 /// \brief Template argument deduction was successful.
5350 /// \brief The declaration was invalid; do nothing.
5352 /// \brief Template argument deduction exceeded the maximum template
5353 /// instantiation depth (which has already been diagnosed).
5354 TDK_InstantiationDepth,
5355 /// \brief Template argument deduction did not deduce a value
5356 /// for every template parameter.
5358 /// \brief Template argument deduction produced inconsistent
5359 /// deduced values for the given template parameter.
5361 /// \brief Template argument deduction failed due to inconsistent
5362 /// cv-qualifiers on a template parameter type that would
5363 /// otherwise be deduced, e.g., we tried to deduce T in "const T"
5364 /// but were given a non-const "X".
5366 /// \brief Substitution of the deduced template argument values
5367 /// resulted in an error.
5368 TDK_SubstitutionFailure,
5369 /// \brief Substitution of the deduced template argument values
5370 /// into a non-deduced context produced a type or value that
5371 /// produces a type that does not match the original template
5372 /// arguments provided.
5373 TDK_NonDeducedMismatch,
5374 /// \brief When performing template argument deduction for a function
5375 /// template, there were too many call arguments.
5376 TDK_TooManyArguments,
5377 /// \brief When performing template argument deduction for a function
5378 /// template, there were too few call arguments.
5379 TDK_TooFewArguments,
5380 /// \brief The explicitly-specified template arguments were not valid
5381 /// template arguments for the given template.
5382 TDK_InvalidExplicitArguments,
5383 /// \brief The arguments included an overloaded function name that could
5384 /// not be resolved to a suitable function.
5385 TDK_FailedOverloadResolution
5388 TemplateDeductionResult
5389 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial,
5390 const TemplateArgumentList &TemplateArgs,
5391 sema::TemplateDeductionInfo &Info);
5393 TemplateDeductionResult
5394 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5395 TemplateArgumentListInfo &ExplicitTemplateArgs,
5396 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5397 SmallVectorImpl<QualType> &ParamTypes,
5398 QualType *FunctionType,
5399 sema::TemplateDeductionInfo &Info);
5401 /// brief A function argument from which we performed template argument
5402 // deduction for a call.
5403 struct OriginalCallArg {
5404 OriginalCallArg(QualType OriginalParamType,
5406 QualType OriginalArgType)
5407 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx),
5408 OriginalArgType(OriginalArgType) { }
5410 QualType OriginalParamType;
5412 QualType OriginalArgType;
5415 TemplateDeductionResult
5416 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate,
5417 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5418 unsigned NumExplicitlySpecified,
5419 FunctionDecl *&Specialization,
5420 sema::TemplateDeductionInfo &Info,
5421 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0);
5423 TemplateDeductionResult
5424 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5425 TemplateArgumentListInfo *ExplicitTemplateArgs,
5426 llvm::ArrayRef<Expr *> Args,
5427 FunctionDecl *&Specialization,
5428 sema::TemplateDeductionInfo &Info);
5430 TemplateDeductionResult
5431 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5432 TemplateArgumentListInfo *ExplicitTemplateArgs,
5433 QualType ArgFunctionType,
5434 FunctionDecl *&Specialization,
5435 sema::TemplateDeductionInfo &Info);
5437 TemplateDeductionResult
5438 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5440 CXXConversionDecl *&Specialization,
5441 sema::TemplateDeductionInfo &Info);
5443 TemplateDeductionResult
5444 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5445 TemplateArgumentListInfo *ExplicitTemplateArgs,
5446 FunctionDecl *&Specialization,
5447 sema::TemplateDeductionInfo &Info);
5449 /// \brief Result type of DeduceAutoType.
5450 enum DeduceAutoResult {
5453 DAR_FailedAlreadyDiagnosed
5456 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer,
5457 TypeSourceInfo *&Result);
5458 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init);
5460 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1,
5461 FunctionTemplateDecl *FT2,
5463 TemplatePartialOrderingContext TPOC,
5464 unsigned NumCallArguments);
5465 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin,
5466 UnresolvedSetIterator SEnd,
5467 TemplatePartialOrderingContext TPOC,
5468 unsigned NumCallArguments,
5470 const PartialDiagnostic &NoneDiag,
5471 const PartialDiagnostic &AmbigDiag,
5472 const PartialDiagnostic &CandidateDiag,
5473 bool Complain = true,
5474 QualType TargetType = QualType());
5476 ClassTemplatePartialSpecializationDecl *
5477 getMoreSpecializedPartialSpecialization(
5478 ClassTemplatePartialSpecializationDecl *PS1,
5479 ClassTemplatePartialSpecializationDecl *PS2,
5480 SourceLocation Loc);
5482 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs,
5485 llvm::SmallBitVector &Used);
5486 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate,
5487 llvm::SmallBitVector &Deduced) {
5488 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced);
5490 static void MarkDeducedTemplateParameters(ASTContext &Ctx,
5491 FunctionTemplateDecl *FunctionTemplate,
5492 llvm::SmallBitVector &Deduced);
5494 //===--------------------------------------------------------------------===//
5495 // C++ Template Instantiation
5498 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D,
5499 const TemplateArgumentList *Innermost = 0,
5500 bool RelativeToPrimary = false,
5501 const FunctionDecl *Pattern = 0);
5503 /// \brief A template instantiation that is currently in progress.
5504 struct ActiveTemplateInstantiation {
5505 /// \brief The kind of template instantiation we are performing
5506 enum InstantiationKind {
5507 /// We are instantiating a template declaration. The entity is
5508 /// the declaration we're instantiating (e.g., a CXXRecordDecl).
5509 TemplateInstantiation,
5511 /// We are instantiating a default argument for a template
5512 /// parameter. The Entity is the template, and
5513 /// TemplateArgs/NumTemplateArguments provides the template
5514 /// arguments as specified.
5515 /// FIXME: Use a TemplateArgumentList
5516 DefaultTemplateArgumentInstantiation,
5518 /// We are instantiating a default argument for a function.
5519 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs
5520 /// provides the template arguments as specified.
5521 DefaultFunctionArgumentInstantiation,
5523 /// We are substituting explicit template arguments provided for
5524 /// a function template. The entity is a FunctionTemplateDecl.
5525 ExplicitTemplateArgumentSubstitution,
5527 /// We are substituting template argument determined as part of
5528 /// template argument deduction for either a class template
5529 /// partial specialization or a function template. The
5530 /// Entity is either a ClassTemplatePartialSpecializationDecl or
5531 /// a FunctionTemplateDecl.
5532 DeducedTemplateArgumentSubstitution,
5534 /// We are substituting prior template arguments into a new
5535 /// template parameter. The template parameter itself is either a
5536 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl.
5537 PriorTemplateArgumentSubstitution,
5539 /// We are checking the validity of a default template argument that
5540 /// has been used when naming a template-id.
5541 DefaultTemplateArgumentChecking,
5543 /// We are instantiating the exception specification for a function
5544 /// template which was deferred until it was needed.
5545 ExceptionSpecInstantiation
5548 /// \brief The point of instantiation within the source code.
5549 SourceLocation PointOfInstantiation;
5551 /// \brief The template (or partial specialization) in which we are
5552 /// performing the instantiation, for substitutions of prior template
5554 NamedDecl *Template;
5556 /// \brief The entity that is being instantiated.
5559 /// \brief The list of template arguments we are substituting, if they
5560 /// are not part of the entity.
5561 const TemplateArgument *TemplateArgs;
5563 /// \brief The number of template arguments in TemplateArgs.
5564 unsigned NumTemplateArgs;
5566 /// \brief The template deduction info object associated with the
5567 /// substitution or checking of explicit or deduced template arguments.
5568 sema::TemplateDeductionInfo *DeductionInfo;
5570 /// \brief The source range that covers the construct that cause
5571 /// the instantiation, e.g., the template-id that causes a class
5572 /// template instantiation.
5573 SourceRange InstantiationRange;
5575 ActiveTemplateInstantiation()
5576 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0),
5577 NumTemplateArgs(0), DeductionInfo(0) {}
5579 /// \brief Determines whether this template is an actual instantiation
5580 /// that should be counted toward the maximum instantiation depth.
5581 bool isInstantiationRecord() const;
5583 friend bool operator==(const ActiveTemplateInstantiation &X,
5584 const ActiveTemplateInstantiation &Y) {
5585 if (X.Kind != Y.Kind)
5588 if (X.Entity != Y.Entity)
5592 case TemplateInstantiation:
5593 case ExceptionSpecInstantiation:
5596 case PriorTemplateArgumentSubstitution:
5597 case DefaultTemplateArgumentChecking:
5598 if (X.Template != Y.Template)
5603 case DefaultTemplateArgumentInstantiation:
5604 case ExplicitTemplateArgumentSubstitution:
5605 case DeducedTemplateArgumentSubstitution:
5606 case DefaultFunctionArgumentInstantiation:
5607 return X.TemplateArgs == Y.TemplateArgs;
5611 llvm_unreachable("Invalid InstantiationKind!");
5614 friend bool operator!=(const ActiveTemplateInstantiation &X,
5615 const ActiveTemplateInstantiation &Y) {
5620 /// \brief List of active template instantiations.
5622 /// This vector is treated as a stack. As one template instantiation
5623 /// requires another template instantiation, additional
5624 /// instantiations are pushed onto the stack up to a
5625 /// user-configurable limit LangOptions::InstantiationDepth.
5626 SmallVector<ActiveTemplateInstantiation, 16>
5627 ActiveTemplateInstantiations;
5629 /// \brief Whether we are in a SFINAE context that is not associated with
5630 /// template instantiation.
5632 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside
5633 /// of a template instantiation or template argument deduction.
5634 bool InNonInstantiationSFINAEContext;
5636 /// \brief The number of ActiveTemplateInstantiation entries in
5637 /// \c ActiveTemplateInstantiations that are not actual instantiations and,
5638 /// therefore, should not be counted as part of the instantiation depth.
5639 unsigned NonInstantiationEntries;
5641 /// \brief The last template from which a template instantiation
5642 /// error or warning was produced.
5644 /// This value is used to suppress printing of redundant template
5645 /// instantiation backtraces when there are multiple errors in the
5646 /// same instantiation. FIXME: Does this belong in Sema? It's tough
5647 /// to implement it anywhere else.
5648 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext;
5650 /// \brief The current index into pack expansion arguments that will be
5651 /// used for substitution of parameter packs.
5653 /// The pack expansion index will be -1 to indicate that parameter packs
5654 /// should be instantiated as themselves. Otherwise, the index specifies
5655 /// which argument within the parameter pack will be used for substitution.
5656 int ArgumentPackSubstitutionIndex;
5658 /// \brief RAII object used to change the argument pack substitution index
5659 /// within a \c Sema object.
5661 /// See \c ArgumentPackSubstitutionIndex for more information.
5662 class ArgumentPackSubstitutionIndexRAII {
5664 int OldSubstitutionIndex;
5667 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex)
5668 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) {
5669 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex;
5672 ~ArgumentPackSubstitutionIndexRAII() {
5673 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex;
5677 friend class ArgumentPackSubstitutionRAII;
5679 /// \brief The stack of calls expression undergoing template instantiation.
5681 /// The top of this stack is used by a fixit instantiating unresolved
5682 /// function calls to fix the AST to match the textual change it prints.
5683 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation;
5685 /// \brief For each declaration that involved template argument deduction, the
5686 /// set of diagnostics that were suppressed during that template argument
5689 /// FIXME: Serialize this structure to the AST file.
5690 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >
5691 SuppressedDiagnostics;
5693 /// \brief A stack object to be created when performing template
5696 /// Construction of an object of type \c InstantiatingTemplate
5697 /// pushes the current instantiation onto the stack of active
5698 /// instantiations. If the size of this stack exceeds the maximum
5699 /// number of recursive template instantiations, construction
5700 /// produces an error and evaluates true.
5702 /// Destruction of this object will pop the named instantiation off
5704 struct InstantiatingTemplate {
5705 /// \brief Note that we are instantiating a class template,
5706 /// function template, or a member thereof.
5707 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5709 SourceRange InstantiationRange = SourceRange());
5711 struct ExceptionSpecification {};
5712 /// \brief Note that we are instantiating an exception specification
5713 /// of a function template.
5714 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5715 FunctionDecl *Entity, ExceptionSpecification,
5716 SourceRange InstantiationRange = SourceRange());
5718 /// \brief Note that we are instantiating a default argument in a
5720 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5721 TemplateDecl *Template,
5722 ArrayRef<TemplateArgument> TemplateArgs,
5723 SourceRange InstantiationRange = SourceRange());
5725 /// \brief Note that we are instantiating a default argument in a
5727 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5728 FunctionTemplateDecl *FunctionTemplate,
5729 ArrayRef<TemplateArgument> TemplateArgs,
5730 ActiveTemplateInstantiation::InstantiationKind Kind,
5731 sema::TemplateDeductionInfo &DeductionInfo,
5732 SourceRange InstantiationRange = SourceRange());
5734 /// \brief Note that we are instantiating as part of template
5735 /// argument deduction for a class template partial
5737 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5738 ClassTemplatePartialSpecializationDecl *PartialSpec,
5739 ArrayRef<TemplateArgument> TemplateArgs,
5740 sema::TemplateDeductionInfo &DeductionInfo,
5741 SourceRange InstantiationRange = SourceRange());
5743 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5745 ArrayRef<TemplateArgument> TemplateArgs,
5746 SourceRange InstantiationRange = SourceRange());
5748 /// \brief Note that we are substituting prior template arguments into a
5749 /// non-type or template template parameter.
5750 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5751 NamedDecl *Template,
5752 NonTypeTemplateParmDecl *Param,
5753 ArrayRef<TemplateArgument> TemplateArgs,
5754 SourceRange InstantiationRange);
5756 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5757 NamedDecl *Template,
5758 TemplateTemplateParmDecl *Param,
5759 ArrayRef<TemplateArgument> TemplateArgs,
5760 SourceRange InstantiationRange);
5762 /// \brief Note that we are checking the default template argument
5763 /// against the template parameter for a given template-id.
5764 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5765 TemplateDecl *Template,
5767 ArrayRef<TemplateArgument> TemplateArgs,
5768 SourceRange InstantiationRange);
5771 /// \brief Note that we have finished instantiating this template.
5774 ~InstantiatingTemplate() { Clear(); }
5776 /// \brief Determines whether we have exceeded the maximum
5777 /// recursive template instantiations.
5778 operator bool() const { return Invalid; }
5783 bool SavedInNonInstantiationSFINAEContext;
5784 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation,
5785 SourceRange InstantiationRange);
5787 InstantiatingTemplate(const InstantiatingTemplate&) LLVM_DELETED_FUNCTION;
5789 InstantiatingTemplate&
5790 operator=(const InstantiatingTemplate&) LLVM_DELETED_FUNCTION;
5793 void PrintInstantiationStack();
5795 /// \brief Determines whether we are currently in a context where
5796 /// template argument substitution failures are not considered
5799 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context.
5800 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest
5801 /// template-deduction context object, which can be used to capture
5802 /// diagnostics that will be suppressed.
5803 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
5805 /// \brief Determines whether we are currently in a context that
5806 /// is not evaluated as per C++ [expr] p5.
5807 bool isUnevaluatedContext() const {
5808 assert(!ExprEvalContexts.empty() &&
5809 "Must be in an expression evaluation context");
5810 return ExprEvalContexts.back().Context == Sema::Unevaluated;
5813 /// \brief RAII class used to determine whether SFINAE has
5814 /// trapped any errors that occur during template argument
5818 unsigned PrevSFINAEErrors;
5819 bool PrevInNonInstantiationSFINAEContext;
5820 bool PrevAccessCheckingSFINAE;
5823 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false)
5824 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors),
5825 PrevInNonInstantiationSFINAEContext(
5826 SemaRef.InNonInstantiationSFINAEContext),
5827 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE)
5829 if (!SemaRef.isSFINAEContext())
5830 SemaRef.InNonInstantiationSFINAEContext = true;
5831 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE;
5835 SemaRef.NumSFINAEErrors = PrevSFINAEErrors;
5836 SemaRef.InNonInstantiationSFINAEContext
5837 = PrevInNonInstantiationSFINAEContext;
5838 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE;
5841 /// \brief Determine whether any SFINAE errors have been trapped.
5842 bool hasErrorOccurred() const {
5843 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors;
5847 /// \brief The current instantiation scope used to store local
5849 LocalInstantiationScope *CurrentInstantiationScope;
5851 /// \brief The number of typos corrected by CorrectTypo.
5852 unsigned TyposCorrected;
5854 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection>
5855 UnqualifiedTyposCorrectedMap;
5857 /// \brief A cache containing the results of typo correction for unqualified
5860 /// The string is the string that we corrected to (which may be empty, if
5861 /// there was no correction), while the boolean will be true when the
5862 /// string represents a keyword.
5863 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected;
5865 /// \brief Worker object for performing CFG-based warnings.
5866 sema::AnalysisBasedWarnings AnalysisWarnings;
5868 /// \brief An entity for which implicit template instantiation is required.
5870 /// The source location associated with the declaration is the first place in
5871 /// the source code where the declaration was "used". It is not necessarily
5872 /// the point of instantiation (which will be either before or after the
5873 /// namespace-scope declaration that triggered this implicit instantiation),
5874 /// However, it is the location that diagnostics should generally refer to,
5875 /// because users will need to know what code triggered the instantiation.
5876 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation;
5878 /// \brief The queue of implicit template instantiations that are required
5879 /// but have not yet been performed.
5880 std::deque<PendingImplicitInstantiation> PendingInstantiations;
5882 /// \brief The queue of implicit template instantiations that are required
5883 /// and must be performed within the current local scope.
5885 /// This queue is only used for member functions of local classes in
5886 /// templates, which must be instantiated in the same scope as their
5887 /// enclosing function, so that they can reference function-local
5888 /// types, static variables, enumerators, etc.
5889 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations;
5891 void PerformPendingInstantiations(bool LocalOnly = false);
5893 TypeSourceInfo *SubstType(TypeSourceInfo *T,
5894 const MultiLevelTemplateArgumentList &TemplateArgs,
5895 SourceLocation Loc, DeclarationName Entity);
5897 QualType SubstType(QualType T,
5898 const MultiLevelTemplateArgumentList &TemplateArgs,
5899 SourceLocation Loc, DeclarationName Entity);
5901 TypeSourceInfo *SubstType(TypeLoc TL,
5902 const MultiLevelTemplateArgumentList &TemplateArgs,
5903 SourceLocation Loc, DeclarationName Entity);
5905 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T,
5906 const MultiLevelTemplateArgumentList &TemplateArgs,
5908 DeclarationName Entity,
5909 CXXRecordDecl *ThisContext,
5910 unsigned ThisTypeQuals);
5911 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D,
5912 const MultiLevelTemplateArgumentList &TemplateArgs,
5913 int indexAdjustment,
5914 llvm::Optional<unsigned> NumExpansions,
5915 bool ExpectParameterPack);
5916 bool SubstParmTypes(SourceLocation Loc,
5917 ParmVarDecl **Params, unsigned NumParams,
5918 const MultiLevelTemplateArgumentList &TemplateArgs,
5919 SmallVectorImpl<QualType> &ParamTypes,
5920 SmallVectorImpl<ParmVarDecl *> *OutParams = 0);
5921 ExprResult SubstExpr(Expr *E,
5922 const MultiLevelTemplateArgumentList &TemplateArgs);
5924 /// \brief Substitute the given template arguments into a list of
5925 /// expressions, expanding pack expansions if required.
5927 /// \param Exprs The list of expressions to substitute into.
5929 /// \param NumExprs The number of expressions in \p Exprs.
5931 /// \param IsCall Whether this is some form of call, in which case
5932 /// default arguments will be dropped.
5934 /// \param TemplateArgs The set of template arguments to substitute.
5936 /// \param Outputs Will receive all of the substituted arguments.
5938 /// \returns true if an error occurred, false otherwise.
5939 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall,
5940 const MultiLevelTemplateArgumentList &TemplateArgs,
5941 SmallVectorImpl<Expr *> &Outputs);
5943 StmtResult SubstStmt(Stmt *S,
5944 const MultiLevelTemplateArgumentList &TemplateArgs);
5946 Decl *SubstDecl(Decl *D, DeclContext *Owner,
5947 const MultiLevelTemplateArgumentList &TemplateArgs);
5949 ExprResult SubstInitializer(Expr *E,
5950 const MultiLevelTemplateArgumentList &TemplateArgs,
5951 bool CXXDirectInit);
5954 SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
5955 CXXRecordDecl *Pattern,
5956 const MultiLevelTemplateArgumentList &TemplateArgs);
5959 InstantiateClass(SourceLocation PointOfInstantiation,
5960 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
5961 const MultiLevelTemplateArgumentList &TemplateArgs,
5962 TemplateSpecializationKind TSK,
5963 bool Complain = true);
5965 bool InstantiateEnum(SourceLocation PointOfInstantiation,
5966 EnumDecl *Instantiation, EnumDecl *Pattern,
5967 const MultiLevelTemplateArgumentList &TemplateArgs,
5968 TemplateSpecializationKind TSK);
5970 struct LateInstantiatedAttribute {
5971 const Attr *TmplAttr;
5972 LocalInstantiationScope *Scope;
5975 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S,
5977 : TmplAttr(A), Scope(S), NewDecl(D)
5980 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec;
5982 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
5983 const Decl *Pattern, Decl *Inst,
5984 LateInstantiatedAttrVec *LateAttrs = 0,
5985 LocalInstantiationScope *OuterMostScope = 0);
5988 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation,
5989 ClassTemplateSpecializationDecl *ClassTemplateSpec,
5990 TemplateSpecializationKind TSK,
5991 bool Complain = true);
5993 void InstantiateClassMembers(SourceLocation PointOfInstantiation,
5994 CXXRecordDecl *Instantiation,
5995 const MultiLevelTemplateArgumentList &TemplateArgs,
5996 TemplateSpecializationKind TSK);
5998 void InstantiateClassTemplateSpecializationMembers(
5999 SourceLocation PointOfInstantiation,
6000 ClassTemplateSpecializationDecl *ClassTemplateSpec,
6001 TemplateSpecializationKind TSK);
6003 NestedNameSpecifierLoc
6004 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
6005 const MultiLevelTemplateArgumentList &TemplateArgs);
6008 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
6009 const MultiLevelTemplateArgumentList &TemplateArgs);
6011 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name,
6013 const MultiLevelTemplateArgumentList &TemplateArgs);
6014 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
6015 TemplateArgumentListInfo &Result,
6016 const MultiLevelTemplateArgumentList &TemplateArgs);
6018 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
6019 FunctionDecl *Function);
6020 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
6021 FunctionDecl *Function,
6022 bool Recursive = false,
6023 bool DefinitionRequired = false);
6024 void InstantiateStaticDataMemberDefinition(
6025 SourceLocation PointOfInstantiation,
6027 bool Recursive = false,
6028 bool DefinitionRequired = false);
6030 void InstantiateMemInitializers(CXXConstructorDecl *New,
6031 const CXXConstructorDecl *Tmpl,
6032 const MultiLevelTemplateArgumentList &TemplateArgs);
6034 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
6035 const MultiLevelTemplateArgumentList &TemplateArgs);
6036 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC,
6037 const MultiLevelTemplateArgumentList &TemplateArgs);
6039 // Objective-C declarations.
6040 enum ObjCContainerKind {
6047 OCK_CategoryImplementation
6049 ObjCContainerKind getObjCContainerKind() const;
6051 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
6052 IdentifierInfo *ClassName,
6053 SourceLocation ClassLoc,
6054 IdentifierInfo *SuperName,
6055 SourceLocation SuperLoc,
6056 Decl * const *ProtoRefs,
6057 unsigned NumProtoRefs,
6058 const SourceLocation *ProtoLocs,
6059 SourceLocation EndProtoLoc,
6060 AttributeList *AttrList);
6062 Decl *ActOnCompatibilityAlias(
6063 SourceLocation AtCompatibilityAliasLoc,
6064 IdentifierInfo *AliasName, SourceLocation AliasLocation,
6065 IdentifierInfo *ClassName, SourceLocation ClassLocation);
6067 bool CheckForwardProtocolDeclarationForCircularDependency(
6068 IdentifierInfo *PName,
6069 SourceLocation &PLoc, SourceLocation PrevLoc,
6070 const ObjCList<ObjCProtocolDecl> &PList);
6072 Decl *ActOnStartProtocolInterface(
6073 SourceLocation AtProtoInterfaceLoc,
6074 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc,
6075 Decl * const *ProtoRefNames, unsigned NumProtoRefs,
6076 const SourceLocation *ProtoLocs,
6077 SourceLocation EndProtoLoc,
6078 AttributeList *AttrList);
6080 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
6081 IdentifierInfo *ClassName,
6082 SourceLocation ClassLoc,
6083 IdentifierInfo *CategoryName,
6084 SourceLocation CategoryLoc,
6085 Decl * const *ProtoRefs,
6086 unsigned NumProtoRefs,
6087 const SourceLocation *ProtoLocs,
6088 SourceLocation EndProtoLoc);
6090 Decl *ActOnStartClassImplementation(
6091 SourceLocation AtClassImplLoc,
6092 IdentifierInfo *ClassName, SourceLocation ClassLoc,
6093 IdentifierInfo *SuperClassname,
6094 SourceLocation SuperClassLoc);
6096 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc,
6097 IdentifierInfo *ClassName,
6098 SourceLocation ClassLoc,
6099 IdentifierInfo *CatName,
6100 SourceLocation CatLoc);
6102 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl,
6103 ArrayRef<Decl *> Decls);
6105 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc,
6106 IdentifierInfo **IdentList,
6107 SourceLocation *IdentLocs,
6110 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc,
6111 const IdentifierLocPair *IdentList,
6113 AttributeList *attrList);
6115 void FindProtocolDeclaration(bool WarnOnDeclarations,
6116 const IdentifierLocPair *ProtocolId,
6117 unsigned NumProtocols,
6118 SmallVectorImpl<Decl *> &Protocols);
6120 /// Ensure attributes are consistent with type.
6121 /// \param [in, out] Attributes The attributes to check; they will
6122 /// be modified to be consistent with \p PropertyTy.
6123 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy,
6125 unsigned &Attributes,
6126 bool propertyInPrimaryClass);
6128 /// Process the specified property declaration and create decls for the
6129 /// setters and getters as needed.
6130 /// \param property The property declaration being processed
6131 /// \param CD The semantic container for the property
6132 /// \param redeclaredProperty Declaration for property if redeclared
6133 /// in class extension.
6134 /// \param lexicalDC Container for redeclaredProperty.
6135 void ProcessPropertyDecl(ObjCPropertyDecl *property,
6136 ObjCContainerDecl *CD,
6137 ObjCPropertyDecl *redeclaredProperty = 0,
6138 ObjCContainerDecl *lexicalDC = 0);
6141 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
6142 ObjCPropertyDecl *SuperProperty,
6143 const IdentifierInfo *Name);
6144 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl);
6147 void CompareProperties(Decl *CDecl, Decl *MergeProtocols);
6149 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
6150 ObjCInterfaceDecl *ID);
6152 void MatchOneProtocolPropertiesInClass(Decl *CDecl,
6153 ObjCProtocolDecl *PDecl);
6155 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd,
6156 Decl **allMethods = 0, unsigned allNum = 0,
6157 Decl **allProperties = 0, unsigned pNum = 0,
6158 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0);
6160 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc,
6161 SourceLocation LParenLoc,
6162 FieldDeclarator &FD, ObjCDeclSpec &ODS,
6163 Selector GetterSel, Selector SetterSel,
6164 bool *OverridingProperty,
6165 tok::ObjCKeywordKind MethodImplKind,
6166 DeclContext *lexicalDC = 0);
6168 Decl *ActOnPropertyImplDecl(Scope *S,
6169 SourceLocation AtLoc,
6170 SourceLocation PropertyLoc,
6172 IdentifierInfo *PropertyId,
6173 IdentifierInfo *PropertyIvar,
6174 SourceLocation PropertyIvarLoc);
6176 enum ObjCSpecialMethodKind {
6182 OSMK_NonRetainingInit
6185 struct ObjCArgInfo {
6186 IdentifierInfo *Name;
6187 SourceLocation NameLoc;
6188 // The Type is null if no type was specified, and the DeclSpec is invalid
6191 ObjCDeclSpec DeclSpec;
6193 /// ArgAttrs - Attribute list for this argument.
6194 AttributeList *ArgAttrs;
6197 Decl *ActOnMethodDeclaration(
6199 SourceLocation BeginLoc, // location of the + or -.
6200 SourceLocation EndLoc, // location of the ; or {.
6201 tok::TokenKind MethodType,
6202 ObjCDeclSpec &ReturnQT, ParsedType ReturnType,
6203 ArrayRef<SourceLocation> SelectorLocs, Selector Sel,
6204 // optional arguments. The number of types/arguments is obtained
6205 // from the Sel.getNumArgs().
6206 ObjCArgInfo *ArgInfo,
6207 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args
6208 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind,
6209 bool isVariadic, bool MethodDefinition);
6211 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel,
6212 const ObjCObjectPointerType *OPT,
6214 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty,
6217 bool inferObjCARCLifetime(ValueDecl *decl);
6220 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT,
6222 SourceLocation OpLoc,
6223 DeclarationName MemberName,
6224 SourceLocation MemberLoc,
6225 SourceLocation SuperLoc, QualType SuperType,
6229 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName,
6230 IdentifierInfo &propertyName,
6231 SourceLocation receiverNameLoc,
6232 SourceLocation propertyNameLoc);
6234 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc);
6236 /// \brief Describes the kind of message expression indicated by a message
6237 /// send that starts with an identifier.
6238 enum ObjCMessageKind {
6239 /// \brief The message is sent to 'super'.
6241 /// \brief The message is an instance message.
6242 ObjCInstanceMessage,
6243 /// \brief The message is a class message, and the identifier is a type
6248 ObjCMessageKind getObjCMessageKind(Scope *S,
6249 IdentifierInfo *Name,
6250 SourceLocation NameLoc,
6252 bool HasTrailingDot,
6253 ParsedType &ReceiverType);
6255 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc,
6257 SourceLocation LBracLoc,
6258 ArrayRef<SourceLocation> SelectorLocs,
6259 SourceLocation RBracLoc,
6262 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
6263 QualType ReceiverType,
6264 SourceLocation SuperLoc,
6266 ObjCMethodDecl *Method,
6267 SourceLocation LBracLoc,
6268 ArrayRef<SourceLocation> SelectorLocs,
6269 SourceLocation RBracLoc,
6271 bool isImplicit = false);
6273 ExprResult BuildClassMessageImplicit(QualType ReceiverType,
6274 bool isSuperReceiver,
6277 ObjCMethodDecl *Method,
6280 ExprResult ActOnClassMessage(Scope *S,
6281 ParsedType Receiver,
6283 SourceLocation LBracLoc,
6284 ArrayRef<SourceLocation> SelectorLocs,
6285 SourceLocation RBracLoc,
6288 ExprResult BuildInstanceMessage(Expr *Receiver,
6289 QualType ReceiverType,
6290 SourceLocation SuperLoc,
6292 ObjCMethodDecl *Method,
6293 SourceLocation LBracLoc,
6294 ArrayRef<SourceLocation> SelectorLocs,
6295 SourceLocation RBracLoc,
6297 bool isImplicit = false);
6299 ExprResult BuildInstanceMessageImplicit(Expr *Receiver,
6300 QualType ReceiverType,
6303 ObjCMethodDecl *Method,
6306 ExprResult ActOnInstanceMessage(Scope *S,
6309 SourceLocation LBracLoc,
6310 ArrayRef<SourceLocation> SelectorLocs,
6311 SourceLocation RBracLoc,
6314 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc,
6315 ObjCBridgeCastKind Kind,
6316 SourceLocation BridgeKeywordLoc,
6317 TypeSourceInfo *TSInfo,
6320 ExprResult ActOnObjCBridgedCast(Scope *S,
6321 SourceLocation LParenLoc,
6322 ObjCBridgeCastKind Kind,
6323 SourceLocation BridgeKeywordLoc,
6325 SourceLocation RParenLoc,
6328 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
6330 /// \brief Check whether the given new method is a valid override of the
6331 /// given overridden method, and set any properties that should be inherited.
6332 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod,
6333 const ObjCMethodDecl *Overridden,
6334 bool IsImplementation);
6336 /// \brief Describes the compatibility of a result type with its method.
6337 enum ResultTypeCompatibilityKind {
6343 void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod,
6344 ObjCInterfaceDecl *CurrentClass,
6345 ResultTypeCompatibilityKind RTC);
6347 enum PragmaOptionsAlignKind {
6348 POAK_Native, // #pragma options align=native
6349 POAK_Natural, // #pragma options align=natural
6350 POAK_Packed, // #pragma options align=packed
6351 POAK_Power, // #pragma options align=power
6352 POAK_Mac68k, // #pragma options align=mac68k
6353 POAK_Reset // #pragma options align=reset
6356 /// ActOnPragmaOptionsAlign - Called on well formed \#pragma options align.
6357 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
6358 SourceLocation PragmaLoc);
6360 enum PragmaPackKind {
6361 PPK_Default, // #pragma pack([n])
6362 PPK_Show, // #pragma pack(show), only supported by MSVC.
6363 PPK_Push, // #pragma pack(push, [identifier], [n])
6364 PPK_Pop // #pragma pack(pop, [identifier], [n])
6367 enum PragmaMSStructKind {
6368 PMSST_OFF, // #pragms ms_struct off
6369 PMSST_ON // #pragms ms_struct on
6372 /// ActOnPragmaPack - Called on well formed \#pragma pack(...).
6373 void ActOnPragmaPack(PragmaPackKind Kind,
6374 IdentifierInfo *Name,
6376 SourceLocation PragmaLoc,
6377 SourceLocation LParenLoc,
6378 SourceLocation RParenLoc);
6380 /// ActOnPragmaMSStruct - Called on well formed \#pragma ms_struct [on|off].
6381 void ActOnPragmaMSStruct(PragmaMSStructKind Kind);
6383 /// ActOnPragmaUnused - Called on well-formed '\#pragma unused'.
6384 void ActOnPragmaUnused(const Token &Identifier,
6386 SourceLocation PragmaLoc);
6388 /// ActOnPragmaVisibility - Called on well formed \#pragma GCC visibility... .
6389 void ActOnPragmaVisibility(const IdentifierInfo* VisType,
6390 SourceLocation PragmaLoc);
6392 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
6393 SourceLocation Loc);
6394 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W);
6396 /// ActOnPragmaWeakID - Called on well formed \#pragma weak ident.
6397 void ActOnPragmaWeakID(IdentifierInfo* WeakName,
6398 SourceLocation PragmaLoc,
6399 SourceLocation WeakNameLoc);
6401 /// ActOnPragmaRedefineExtname - Called on well formed
6402 /// \#pragma redefine_extname oldname newname.
6403 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName,
6404 IdentifierInfo* AliasName,
6405 SourceLocation PragmaLoc,
6406 SourceLocation WeakNameLoc,
6407 SourceLocation AliasNameLoc);
6409 /// ActOnPragmaWeakAlias - Called on well formed \#pragma weak ident = ident.
6410 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName,
6411 IdentifierInfo* AliasName,
6412 SourceLocation PragmaLoc,
6413 SourceLocation WeakNameLoc,
6414 SourceLocation AliasNameLoc);
6416 /// ActOnPragmaFPContract - Called on well formed
6417 /// \#pragma {STDC,OPENCL} FP_CONTRACT
6418 void ActOnPragmaFPContract(tok::OnOffSwitch OOS);
6420 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to
6421 /// a the record decl, to handle '\#pragma pack' and '\#pragma options align'.
6422 void AddAlignmentAttributesForRecord(RecordDecl *RD);
6424 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record.
6425 void AddMsStructLayoutForRecord(RecordDecl *RD);
6427 /// FreePackedContext - Deallocate and null out PackContext.
6428 void FreePackedContext();
6430 /// PushNamespaceVisibilityAttr - Note that we've entered a
6431 /// namespace with a visibility attribute.
6432 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr,
6433 SourceLocation Loc);
6435 /// AddPushedVisibilityAttribute - If '\#pragma GCC visibility' was used,
6436 /// add an appropriate visibility attribute.
6437 void AddPushedVisibilityAttribute(Decl *RD);
6439 /// PopPragmaVisibility - Pop the top element of the visibility stack; used
6440 /// for '\#pragma GCC visibility' and visibility attributes on namespaces.
6441 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc);
6443 /// FreeVisContext - Deallocate and null out VisContext.
6444 void FreeVisContext();
6446 /// AddCFAuditedAttribute - Check whether we're currently within
6447 /// '\#pragma clang arc_cf_code_audited' and, if so, consider adding
6448 /// the appropriate attribute.
6449 void AddCFAuditedAttribute(Decl *D);
6451 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
6452 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E,
6454 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T,
6457 /// \brief The kind of conversion being performed.
6458 enum CheckedConversionKind {
6459 /// \brief An implicit conversion.
6460 CCK_ImplicitConversion,
6461 /// \brief A C-style cast.
6463 /// \brief A functional-style cast.
6465 /// \brief A cast other than a C-style cast.
6469 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
6470 /// cast. If there is already an implicit cast, merge into the existing one.
6471 /// If isLvalue, the result of the cast is an lvalue.
6472 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK,
6473 ExprValueKind VK = VK_RValue,
6474 const CXXCastPath *BasePath = 0,
6475 CheckedConversionKind CCK
6476 = CCK_ImplicitConversion);
6478 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
6479 /// to the conversion from scalar type ScalarTy to the Boolean type.
6480 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy);
6482 /// IgnoredValueConversions - Given that an expression's result is
6483 /// syntactically ignored, perform any conversions that are
6485 ExprResult IgnoredValueConversions(Expr *E);
6487 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
6488 // functions and arrays to their respective pointers (C99 6.3.2.1).
6489 ExprResult UsualUnaryConversions(Expr *E);
6491 // DefaultFunctionArrayConversion - converts functions and arrays
6492 // to their respective pointers (C99 6.3.2.1).
6493 ExprResult DefaultFunctionArrayConversion(Expr *E);
6495 // DefaultFunctionArrayLvalueConversion - converts functions and
6496 // arrays to their respective pointers and performs the
6497 // lvalue-to-rvalue conversion.
6498 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E);
6500 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on
6501 // the operand. This is DefaultFunctionArrayLvalueConversion,
6502 // except that it assumes the operand isn't of function or array
6504 ExprResult DefaultLvalueConversion(Expr *E);
6506 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that
6507 // do not have a prototype. Integer promotions are performed on each
6508 // argument, and arguments that have type float are promoted to double.
6509 ExprResult DefaultArgumentPromotion(Expr *E);
6511 // Used for emitting the right warning by DefaultVariadicArgumentPromotion
6512 enum VariadicCallType {
6516 VariadicConstructor,
6517 VariadicDoesNotApply
6520 VariadicCallType getVariadicCallType(FunctionDecl *FDecl,
6521 const FunctionProtoType *Proto,
6524 // Used for determining in which context a type is allowed to be passed to a
6532 // Determines which VarArgKind fits an expression.
6533 VarArgKind isValidVarArgType(const QualType &Ty);
6535 /// GatherArgumentsForCall - Collector argument expressions for various
6536 /// form of call prototypes.
6537 bool GatherArgumentsForCall(SourceLocation CallLoc,
6538 FunctionDecl *FDecl,
6539 const FunctionProtoType *Proto,
6540 unsigned FirstProtoArg,
6541 Expr **Args, unsigned NumArgs,
6542 SmallVector<Expr *, 8> &AllArgs,
6543 VariadicCallType CallType = VariadicDoesNotApply,
6544 bool AllowExplicit = false);
6546 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
6547 // will create a runtime trap if the resulting type is not a POD type.
6548 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
6549 FunctionDecl *FDecl);
6551 /// Checks to see if the given expression is a valid argument to a variadic
6552 /// function, issuing a diagnostic and returning NULL if not.
6553 bool variadicArgumentPODCheck(const Expr *E, VariadicCallType CT);
6555 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's
6556 // operands and then handles various conversions that are common to binary
6557 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this
6558 // routine returns the first non-arithmetic type found. The client is
6559 // responsible for emitting appropriate error diagnostics.
6560 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS,
6561 bool IsCompAssign = false);
6563 /// AssignConvertType - All of the 'assignment' semantic checks return this
6564 /// enum to indicate whether the assignment was allowed. These checks are
6565 /// done for simple assignments, as well as initialization, return from
6566 /// function, argument passing, etc. The query is phrased in terms of a
6567 /// source and destination type.
6568 enum AssignConvertType {
6569 /// Compatible - the types are compatible according to the standard.
6572 /// PointerToInt - The assignment converts a pointer to an int, which we
6573 /// accept as an extension.
6576 /// IntToPointer - The assignment converts an int to a pointer, which we
6577 /// accept as an extension.
6580 /// FunctionVoidPointer - The assignment is between a function pointer and
6581 /// void*, which the standard doesn't allow, but we accept as an extension.
6582 FunctionVoidPointer,
6584 /// IncompatiblePointer - The assignment is between two pointers types that
6585 /// are not compatible, but we accept them as an extension.
6586 IncompatiblePointer,
6588 /// IncompatiblePointer - The assignment is between two pointers types which
6589 /// point to integers which have a different sign, but are otherwise
6590 /// identical. This is a subset of the above, but broken out because it's by
6591 /// far the most common case of incompatible pointers.
6592 IncompatiblePointerSign,
6594 /// CompatiblePointerDiscardsQualifiers - The assignment discards
6595 /// c/v/r qualifiers, which we accept as an extension.
6596 CompatiblePointerDiscardsQualifiers,
6598 /// IncompatiblePointerDiscardsQualifiers - The assignment
6599 /// discards qualifiers that we don't permit to be discarded,
6600 /// like address spaces.
6601 IncompatiblePointerDiscardsQualifiers,
6603 /// IncompatibleNestedPointerQualifiers - The assignment is between two
6604 /// nested pointer types, and the qualifiers other than the first two
6605 /// levels differ e.g. char ** -> const char **, but we accept them as an
6607 IncompatibleNestedPointerQualifiers,
6609 /// IncompatibleVectors - The assignment is between two vector types that
6610 /// have the same size, which we accept as an extension.
6611 IncompatibleVectors,
6613 /// IntToBlockPointer - The assignment converts an int to a block
6614 /// pointer. We disallow this.
6617 /// IncompatibleBlockPointer - The assignment is between two block
6618 /// pointers types that are not compatible.
6619 IncompatibleBlockPointer,
6621 /// IncompatibleObjCQualifiedId - The assignment is between a qualified
6622 /// id type and something else (that is incompatible with it). For example,
6623 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol.
6624 IncompatibleObjCQualifiedId,
6626 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an
6627 /// object with __weak qualifier.
6628 IncompatibleObjCWeakRef,
6630 /// Incompatible - We reject this conversion outright, it is invalid to
6631 /// represent it in the AST.
6635 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the
6636 /// assignment conversion type specified by ConvTy. This returns true if the
6637 /// conversion was invalid or false if the conversion was accepted.
6638 bool DiagnoseAssignmentResult(AssignConvertType ConvTy,
6640 QualType DstType, QualType SrcType,
6641 Expr *SrcExpr, AssignmentAction Action,
6642 bool *Complained = 0);
6644 /// DiagnoseAssignmentEnum - Warn if assignment to enum is a constant
6645 /// integer not in the range of enum values.
6646 void DiagnoseAssignmentEnum(QualType DstType, QualType SrcType,
6649 /// CheckAssignmentConstraints - Perform type checking for assignment,
6650 /// argument passing, variable initialization, and function return values.
6652 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc,
6656 /// Check assignment constraints and prepare for a conversion of the
6657 /// RHS to the LHS type.
6658 AssignConvertType CheckAssignmentConstraints(QualType LHSType,
6662 // CheckSingleAssignmentConstraints - Currently used by
6663 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking,
6664 // this routine performs the default function/array converions.
6665 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType,
6667 bool Diagnose = true);
6669 // \brief If the lhs type is a transparent union, check whether we
6670 // can initialize the transparent union with the given expression.
6671 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType,
6674 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType);
6676 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType);
6678 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6679 AssignmentAction Action,
6680 bool AllowExplicit = false);
6681 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6682 AssignmentAction Action,
6684 ImplicitConversionSequence& ICS);
6685 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6686 const ImplicitConversionSequence& ICS,
6687 AssignmentAction Action,
6688 CheckedConversionKind CCK
6689 = CCK_ImplicitConversion);
6690 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6691 const StandardConversionSequence& SCS,
6692 AssignmentAction Action,
6693 CheckedConversionKind CCK);
6695 /// the following "Check" methods will return a valid/converted QualType
6696 /// or a null QualType (indicating an error diagnostic was issued).
6698 /// type checking binary operators (subroutines of CreateBuiltinBinOp).
6699 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS,
6701 QualType CheckPointerToMemberOperands( // C++ 5.5
6702 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK,
6703 SourceLocation OpLoc, bool isIndirect);
6704 QualType CheckMultiplyDivideOperands( // C99 6.5.5
6705 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign,
6707 QualType CheckRemainderOperands( // C99 6.5.5
6708 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6709 bool IsCompAssign = false);
6710 QualType CheckAdditionOperands( // C99 6.5.6
6711 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6712 QualType* CompLHSTy = 0);
6713 QualType CheckSubtractionOperands( // C99 6.5.6
6714 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6715 QualType* CompLHSTy = 0);
6716 QualType CheckShiftOperands( // C99 6.5.7
6717 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6718 bool IsCompAssign = false);
6719 QualType CheckCompareOperands( // C99 6.5.8/9
6720 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc,
6722 QualType CheckBitwiseOperands( // C99 6.5.[10...12]
6723 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6724 bool IsCompAssign = false);
6725 QualType CheckLogicalOperands( // C99 6.5.[13,14]
6726 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc);
6727 // CheckAssignmentOperands is used for both simple and compound assignment.
6728 // For simple assignment, pass both expressions and a null converted type.
6729 // For compound assignment, pass both expressions and the converted type.
6730 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2]
6731 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType);
6733 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc,
6734 UnaryOperatorKind Opcode, Expr *Op);
6735 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc,
6736 BinaryOperatorKind Opcode,
6737 Expr *LHS, Expr *RHS);
6738 ExprResult checkPseudoObjectRValue(Expr *E);
6739 Expr *recreateSyntacticForm(PseudoObjectExpr *E);
6741 QualType CheckConditionalOperands( // C99 6.5.15
6742 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS,
6743 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc);
6744 QualType CXXCheckConditionalOperands( // C++ 5.16
6745 ExprResult &cond, ExprResult &lhs, ExprResult &rhs,
6746 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc);
6747 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2,
6748 bool *NonStandardCompositeType = 0);
6749 QualType FindCompositePointerType(SourceLocation Loc,
6750 ExprResult &E1, ExprResult &E2,
6751 bool *NonStandardCompositeType = 0) {
6752 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take();
6753 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp,
6754 NonStandardCompositeType);
6760 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS,
6761 SourceLocation QuestionLoc);
6763 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr,
6764 SourceLocation QuestionLoc);
6766 /// type checking for vector binary operators.
6767 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
6768 SourceLocation Loc, bool IsCompAssign);
6769 QualType GetSignedVectorType(QualType V);
6770 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS,
6771 SourceLocation Loc, bool isRelational);
6772 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS,
6773 SourceLocation Loc);
6775 /// type checking declaration initializers (C99 6.7.8)
6776 bool CheckForConstantInitializer(Expr *e, QualType t);
6778 // type checking C++ declaration initializers (C++ [dcl.init]).
6780 /// ReferenceCompareResult - Expresses the result of comparing two
6781 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the
6782 /// purposes of initialization by reference (C++ [dcl.init.ref]p4).
6783 enum ReferenceCompareResult {
6784 /// Ref_Incompatible - The two types are incompatible, so direct
6785 /// reference binding is not possible.
6786 Ref_Incompatible = 0,
6787 /// Ref_Related - The two types are reference-related, which means
6788 /// that their unqualified forms (T1 and T2) are either the same
6789 /// or T1 is a base class of T2.
6791 /// Ref_Compatible_With_Added_Qualification - The two types are
6792 /// reference-compatible with added qualification, meaning that
6793 /// they are reference-compatible and the qualifiers on T1 (cv1)
6794 /// are greater than the qualifiers on T2 (cv2).
6795 Ref_Compatible_With_Added_Qualification,
6796 /// Ref_Compatible - The two types are reference-compatible and
6797 /// have equivalent qualifiers (cv1 == cv2).
6801 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc,
6802 QualType T1, QualType T2,
6803 bool &DerivedToBase,
6804 bool &ObjCConversion,
6805 bool &ObjCLifetimeConversion);
6807 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType,
6808 Expr *CastExpr, CastKind &CastKind,
6809 ExprValueKind &VK, CXXCastPath &Path);
6811 /// \brief Force an expression with unknown-type to an expression of the
6813 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType);
6815 // CheckVectorCast - check type constraints for vectors.
6816 // Since vectors are an extension, there are no C standard reference for this.
6817 // We allow casting between vectors and integer datatypes of the same size.
6818 // returns true if the cast is invalid
6819 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty,
6822 // CheckExtVectorCast - check type constraints for extended vectors.
6823 // Since vectors are an extension, there are no C standard reference for this.
6824 // We allow casting between vectors and integer datatypes of the same size,
6825 // or vectors and the element type of that vector.
6826 // returns the cast expr
6827 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr,
6830 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo,
6831 SourceLocation LParenLoc,
6833 SourceLocation RParenLoc);
6835 enum ARCConversionResult { ACR_okay, ACR_unbridged };
6837 /// \brief Checks for invalid conversions and casts between
6838 /// retainable pointers and other pointer kinds.
6839 ARCConversionResult CheckObjCARCConversion(SourceRange castRange,
6840 QualType castType, Expr *&op,
6841 CheckedConversionKind CCK);
6843 Expr *stripARCUnbridgedCast(Expr *e);
6844 void diagnoseARCUnbridgedCast(Expr *e);
6846 bool CheckObjCARCUnavailableWeakConversion(QualType castType,
6849 /// checkRetainCycles - Check whether an Objective-C message send
6850 /// might create an obvious retain cycle.
6851 void checkRetainCycles(ObjCMessageExpr *msg);
6852 void checkRetainCycles(Expr *receiver, Expr *argument);
6853 void checkRetainCycles(VarDecl *Var, Expr *Init);
6855 /// checkUnsafeAssigns - Check whether +1 expr is being assigned
6856 /// to weak/__unsafe_unretained type.
6857 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS);
6859 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned
6860 /// to weak/__unsafe_unretained expression.
6861 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS);
6863 /// CheckMessageArgumentTypes - Check types in an Obj-C message send.
6864 /// \param Method - May be null.
6865 /// \param [out] ReturnType - The return type of the send.
6866 /// \return true iff there were any incompatible types.
6867 bool CheckMessageArgumentTypes(QualType ReceiverType,
6868 Expr **Args, unsigned NumArgs, Selector Sel,
6869 ArrayRef<SourceLocation> SelectorLocs,
6870 ObjCMethodDecl *Method, bool isClassMessage,
6871 bool isSuperMessage,
6872 SourceLocation lbrac, SourceLocation rbrac,
6873 QualType &ReturnType, ExprValueKind &VK);
6875 /// \brief Determine the result of a message send expression based on
6876 /// the type of the receiver, the method expected to receive the message,
6877 /// and the form of the message send.
6878 QualType getMessageSendResultType(QualType ReceiverType,
6879 ObjCMethodDecl *Method,
6880 bool isClassMessage, bool isSuperMessage);
6882 /// \brief If the given expression involves a message send to a method
6883 /// with a related result type, emit a note describing what happened.
6884 void EmitRelatedResultTypeNote(const Expr *E);
6886 /// CheckBooleanCondition - Diagnose problems involving the use of
6887 /// the given expression as a boolean condition (e.g. in an if
6888 /// statement). Also performs the standard function and array
6889 /// decays, possibly changing the input variable.
6891 /// \param Loc - A location associated with the condition, e.g. the
6893 /// \return true iff there were any errors
6894 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc);
6896 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc,
6899 /// DiagnoseAssignmentAsCondition - Given that an expression is
6900 /// being used as a boolean condition, warn if it's an assignment.
6901 void DiagnoseAssignmentAsCondition(Expr *E);
6903 /// \brief Redundant parentheses over an equality comparison can indicate
6904 /// that the user intended an assignment used as condition.
6905 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE);
6907 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid.
6908 ExprResult CheckCXXBooleanCondition(Expr *CondExpr);
6910 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have
6911 /// the specified width and sign. If an overflow occurs, detect it and emit
6912 /// the specified diagnostic.
6913 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal,
6914 unsigned NewWidth, bool NewSign,
6915 SourceLocation Loc, unsigned DiagID);
6917 /// Checks that the Objective-C declaration is declared in the global scope.
6918 /// Emits an error and marks the declaration as invalid if it's not declared
6919 /// in the global scope.
6920 bool CheckObjCDeclScope(Decl *D);
6922 /// \brief Abstract base class used for diagnosing integer constant
6923 /// expression violations.
6924 class VerifyICEDiagnoser {
6928 VerifyICEDiagnoser(bool Suppress = false) : Suppress(Suppress) { }
6930 virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) =0;
6931 virtual void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR);
6932 virtual ~VerifyICEDiagnoser() { }
6935 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE,
6936 /// and reports the appropriate diagnostics. Returns false on success.
6937 /// Can optionally return the value of the expression.
6938 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6939 VerifyICEDiagnoser &Diagnoser,
6940 bool AllowFold = true);
6941 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6943 bool AllowFold = true);
6944 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result=0);
6946 /// VerifyBitField - verifies that a bit field expression is an ICE and has
6947 /// the correct width, and that the field type is valid.
6948 /// Returns false on success.
6949 /// Can optionally return whether the bit-field is of width 0
6950 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName,
6951 QualType FieldTy, Expr *BitWidth,
6952 bool *ZeroWidth = 0);
6954 enum CUDAFunctionTarget {
6961 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D);
6963 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget,
6964 CUDAFunctionTarget CalleeTarget);
6966 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) {
6967 return CheckCUDATarget(IdentifyCUDATarget(Caller),
6968 IdentifyCUDATarget(Callee));
6971 /// \name Code completion
6973 /// \brief Describes the context in which code completion occurs.
6974 enum ParserCompletionContext {
6975 /// \brief Code completion occurs at top-level or namespace context.
6977 /// \brief Code completion occurs within a class, struct, or union.
6979 /// \brief Code completion occurs within an Objective-C interface, protocol,
6982 /// \brief Code completion occurs within an Objective-C implementation or
6983 /// category implementation
6984 PCC_ObjCImplementation,
6985 /// \brief Code completion occurs within the list of instance variables
6986 /// in an Objective-C interface, protocol, category, or implementation.
6987 PCC_ObjCInstanceVariableList,
6988 /// \brief Code completion occurs following one or more template
6991 /// \brief Code completion occurs following one or more template
6992 /// headers within a class.
6994 /// \brief Code completion occurs within an expression.
6996 /// \brief Code completion occurs within a statement, which may
6997 /// also be an expression or a declaration.
6999 /// \brief Code completion occurs at the beginning of the
7000 /// initialization statement (or expression) in a for loop.
7002 /// \brief Code completion occurs within the condition of an if,
7003 /// while, switch, or for statement.
7005 /// \brief Code completion occurs within the body of a function on a
7006 /// recovery path, where we do not have a specific handle on our position
7008 PCC_RecoveryInFunction,
7009 /// \brief Code completion occurs where only a type is permitted.
7011 /// \brief Code completion occurs in a parenthesized expression, which
7012 /// might also be a type cast.
7013 PCC_ParenthesizedExpression,
7014 /// \brief Code completion occurs within a sequence of declaration
7015 /// specifiers within a function, method, or block.
7016 PCC_LocalDeclarationSpecifiers
7019 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path);
7020 void CodeCompleteOrdinaryName(Scope *S,
7021 ParserCompletionContext CompletionContext);
7022 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS,
7023 bool AllowNonIdentifiers,
7024 bool AllowNestedNameSpecifiers);
7026 struct CodeCompleteExpressionData;
7027 void CodeCompleteExpression(Scope *S,
7028 const CodeCompleteExpressionData &Data);
7029 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base,
7030 SourceLocation OpLoc,
7032 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS);
7033 void CodeCompleteTag(Scope *S, unsigned TagSpec);
7034 void CodeCompleteTypeQualifiers(DeclSpec &DS);
7035 void CodeCompleteCase(Scope *S);
7036 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args);
7037 void CodeCompleteInitializer(Scope *S, Decl *D);
7038 void CodeCompleteReturn(Scope *S);
7039 void CodeCompleteAfterIf(Scope *S);
7040 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS);
7042 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS,
7043 bool EnteringContext);
7044 void CodeCompleteUsing(Scope *S);
7045 void CodeCompleteUsingDirective(Scope *S);
7046 void CodeCompleteNamespaceDecl(Scope *S);
7047 void CodeCompleteNamespaceAliasDecl(Scope *S);
7048 void CodeCompleteOperatorName(Scope *S);
7049 void CodeCompleteConstructorInitializer(Decl *Constructor,
7050 CXXCtorInitializer** Initializers,
7051 unsigned NumInitializers);
7052 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro,
7053 bool AfterAmpersand);
7055 void CodeCompleteObjCAtDirective(Scope *S);
7056 void CodeCompleteObjCAtVisibility(Scope *S);
7057 void CodeCompleteObjCAtStatement(Scope *S);
7058 void CodeCompleteObjCAtExpression(Scope *S);
7059 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS);
7060 void CodeCompleteObjCPropertyGetter(Scope *S);
7061 void CodeCompleteObjCPropertySetter(Scope *S);
7062 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
7064 void CodeCompleteObjCMessageReceiver(Scope *S);
7065 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc,
7066 IdentifierInfo **SelIdents,
7067 unsigned NumSelIdents,
7068 bool AtArgumentExpression);
7069 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver,
7070 IdentifierInfo **SelIdents,
7071 unsigned NumSelIdents,
7072 bool AtArgumentExpression,
7073 bool IsSuper = false);
7074 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver,
7075 IdentifierInfo **SelIdents,
7076 unsigned NumSelIdents,
7077 bool AtArgumentExpression,
7078 ObjCInterfaceDecl *Super = 0);
7079 void CodeCompleteObjCForCollection(Scope *S,
7080 DeclGroupPtrTy IterationVar);
7081 void CodeCompleteObjCSelector(Scope *S,
7082 IdentifierInfo **SelIdents,
7083 unsigned NumSelIdents);
7084 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols,
7085 unsigned NumProtocols);
7086 void CodeCompleteObjCProtocolDecl(Scope *S);
7087 void CodeCompleteObjCInterfaceDecl(Scope *S);
7088 void CodeCompleteObjCSuperclass(Scope *S,
7089 IdentifierInfo *ClassName,
7090 SourceLocation ClassNameLoc);
7091 void CodeCompleteObjCImplementationDecl(Scope *S);
7092 void CodeCompleteObjCInterfaceCategory(Scope *S,
7093 IdentifierInfo *ClassName,
7094 SourceLocation ClassNameLoc);
7095 void CodeCompleteObjCImplementationCategory(Scope *S,
7096 IdentifierInfo *ClassName,
7097 SourceLocation ClassNameLoc);
7098 void CodeCompleteObjCPropertyDefinition(Scope *S);
7099 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S,
7100 IdentifierInfo *PropertyName);
7101 void CodeCompleteObjCMethodDecl(Scope *S,
7102 bool IsInstanceMethod,
7103 ParsedType ReturnType);
7104 void CodeCompleteObjCMethodDeclSelector(Scope *S,
7105 bool IsInstanceMethod,
7106 bool AtParameterName,
7107 ParsedType ReturnType,
7108 IdentifierInfo **SelIdents,
7109 unsigned NumSelIdents);
7110 void CodeCompletePreprocessorDirective(bool InConditional);
7111 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S);
7112 void CodeCompletePreprocessorMacroName(bool IsDefinition);
7113 void CodeCompletePreprocessorExpression();
7114 void CodeCompletePreprocessorMacroArgument(Scope *S,
7115 IdentifierInfo *Macro,
7116 MacroInfo *MacroInfo,
7118 void CodeCompleteNaturalLanguage();
7119 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator,
7120 CodeCompletionTUInfo &CCTUInfo,
7121 SmallVectorImpl<CodeCompletionResult> &Results);
7124 //===--------------------------------------------------------------------===//
7125 // Extra semantic analysis beyond the C type system
7128 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL,
7129 unsigned ByteNo) const;
7132 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
7133 const ArraySubscriptExpr *ASE=0,
7134 bool AllowOnePastEnd=true, bool IndexNegated=false);
7135 void CheckArrayAccess(const Expr *E);
7136 // Used to grab the relevant information from a FormatAttr and a
7137 // FunctionDeclaration.
7138 struct FormatStringInfo {
7140 unsigned FirstDataArg;
7144 bool getFormatStringInfo(const FormatAttr *Format, bool IsCXXMember,
7145 FormatStringInfo *FSI);
7146 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
7147 const FunctionProtoType *Proto);
7148 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc,
7149 Expr **Args, unsigned NumArgs);
7150 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall,
7151 const FunctionProtoType *Proto);
7152 void CheckConstructorCall(FunctionDecl *FDecl,
7155 const FunctionProtoType *Proto,
7156 SourceLocation Loc);
7158 void checkCall(NamedDecl *FDecl, Expr **Args, unsigned NumArgs,
7159 unsigned NumProtoArgs, bool IsMemberFunction,
7160 SourceLocation Loc, SourceRange Range,
7161 VariadicCallType CallType);
7164 bool CheckObjCString(Expr *Arg);
7166 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
7167 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
7168 bool CheckMipsBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
7170 bool SemaBuiltinVAStart(CallExpr *TheCall);
7171 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
7172 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs);
7175 // Used by C++ template instantiation.
7176 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall);
7179 bool SemaBuiltinPrefetch(CallExpr *TheCall);
7180 bool SemaBuiltinObjectSize(CallExpr *TheCall);
7181 bool SemaBuiltinLongjmp(CallExpr *TheCall);
7182 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult);
7183 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult,
7184 AtomicExpr::AtomicOp Op);
7185 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
7186 llvm::APSInt &Result);
7188 enum FormatStringType {
7197 static FormatStringType GetFormatStringType(const FormatAttr *Format);
7199 enum StringLiteralCheckType {
7201 SLCT_UncheckedLiteral,
7205 StringLiteralCheckType checkFormatStringExpr(const Expr *E,
7206 Expr **Args, unsigned NumArgs,
7208 unsigned format_idx,
7209 unsigned firstDataArg,
7210 FormatStringType Type,
7211 VariadicCallType CallType,
7212 bool inFunctionCall = true);
7214 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr,
7215 Expr **Args, unsigned NumArgs, bool HasVAListArg,
7216 unsigned format_idx, unsigned firstDataArg,
7217 FormatStringType Type, bool inFunctionCall,
7218 VariadicCallType CallType);
7220 bool CheckFormatArguments(const FormatAttr *Format, Expr **Args,
7221 unsigned NumArgs, bool IsCXXMember,
7222 VariadicCallType CallType,
7223 SourceLocation Loc, SourceRange Range);
7224 bool CheckFormatArguments(Expr **Args, unsigned NumArgs,
7225 bool HasVAListArg, unsigned format_idx,
7226 unsigned firstDataArg, FormatStringType Type,
7227 VariadicCallType CallType,
7228 SourceLocation Loc, SourceRange range);
7230 void CheckNonNullArguments(const NonNullAttr *NonNull,
7231 const Expr * const *ExprArgs,
7232 SourceLocation CallSiteLoc);
7234 void CheckMemaccessArguments(const CallExpr *Call,
7236 IdentifierInfo *FnName);
7238 void CheckStrlcpycatArguments(const CallExpr *Call,
7239 IdentifierInfo *FnName);
7241 void CheckStrncatArguments(const CallExpr *Call,
7242 IdentifierInfo *FnName);
7244 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType,
7245 SourceLocation ReturnLoc);
7246 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS);
7247 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation());
7249 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field,
7253 /// \brief Register a magic integral constant to be used as a type tag.
7254 void RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind,
7255 uint64_t MagicValue, QualType Type,
7256 bool LayoutCompatible, bool MustBeNull);
7258 struct TypeTagData {
7261 TypeTagData(QualType Type, bool LayoutCompatible, bool MustBeNull) :
7262 Type(Type), LayoutCompatible(LayoutCompatible),
7263 MustBeNull(MustBeNull)
7268 /// If true, \c Type should be compared with other expression's types for
7269 /// layout-compatibility.
7270 unsigned LayoutCompatible : 1;
7271 unsigned MustBeNull : 1;
7274 /// A pair of ArgumentKind identifier and magic value. This uniquely
7275 /// identifies the magic value.
7276 typedef std::pair<const IdentifierInfo *, uint64_t> TypeTagMagicValue;
7279 /// \brief A map from magic value to type information.
7280 OwningPtr<llvm::DenseMap<TypeTagMagicValue, TypeTagData> >
7281 TypeTagForDatatypeMagicValues;
7283 /// \brief Peform checks on a call of a function with argument_with_type_tag
7284 /// or pointer_with_type_tag attributes.
7285 void CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
7286 const Expr * const *ExprArgs);
7288 /// \brief The parser's current scope.
7290 /// The parser maintains this state here.
7294 friend class Parser;
7295 friend class InitializationSequence;
7296 friend class ASTReader;
7297 friend class ASTWriter;
7300 /// \brief Retrieve the parser's current scope.
7302 /// This routine must only be used when it is certain that semantic analysis
7303 /// and the parser are in precisely the same context, which is not the case
7304 /// when, e.g., we are performing any kind of template instantiation.
7305 /// Therefore, the only safe places to use this scope are in the parser
7306 /// itself and in routines directly invoked from the parser and *never* from
7307 /// template substitution or instantiation.
7308 Scope *getCurScope() const { return CurScope; }
7310 Decl *getObjCDeclContext() const;
7312 DeclContext *getCurLexicalContext() const {
7313 return OriginalLexicalContext ? OriginalLexicalContext : CurContext;
7316 AvailabilityResult getCurContextAvailability() const;
7318 const DeclContext *getCurObjCLexicalContext() const {
7319 const DeclContext *DC = getCurLexicalContext();
7320 // A category implicitly has the attribute of the interface.
7321 if (const ObjCCategoryDecl *CatD = dyn_cast<ObjCCategoryDecl>(DC))
7322 DC = CatD->getClassInterface();
7327 /// \brief RAII object that enters a new expression evaluation context.
7328 class EnterExpressionEvaluationContext {
7332 EnterExpressionEvaluationContext(Sema &Actions,
7333 Sema::ExpressionEvaluationContext NewContext,
7334 Decl *LambdaContextDecl = 0,
7335 bool IsDecltype = false)
7336 : Actions(Actions) {
7337 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl,
7340 EnterExpressionEvaluationContext(Sema &Actions,
7341 Sema::ExpressionEvaluationContext NewContext,
7342 Sema::ReuseLambdaContextDecl_t,
7343 bool IsDecltype = false)
7344 : Actions(Actions) {
7345 Actions.PushExpressionEvaluationContext(NewContext,
7346 Sema::ReuseLambdaContextDecl,
7350 ~EnterExpressionEvaluationContext() {
7351 Actions.PopExpressionEvaluationContext();
7355 } // end namespace clang