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/TypeLoc.h"
32 #include "clang/AST/NSAPI.h"
33 #include "clang/Lex/ModuleLoader.h"
34 #include "clang/Basic/Specifiers.h"
35 #include "clang/Basic/TemplateKinds.h"
36 #include "clang/Basic/TypeTraits.h"
37 #include "clang/Basic/ExpressionTraits.h"
38 #include "llvm/ADT/ArrayRef.h"
39 #include "llvm/ADT/OwningPtr.h"
40 #include "llvm/ADT/SmallPtrSet.h"
41 #include "llvm/ADT/SmallVector.h"
47 template <typename ValueT> struct DenseMapInfo;
48 template <typename ValueT, typename ValueInfoT> class DenseSet;
56 class ASTMutationListener;
64 class CXXBindTemporaryExpr;
65 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
66 class CXXConstructorDecl;
67 class CXXConversionDecl;
68 class CXXDestructorDecl;
69 class CXXFieldCollector;
70 class CXXMemberCallExpr;
76 class ClassTemplateDecl;
77 class ClassTemplatePartialSpecializationDecl;
78 class ClassTemplateSpecializationDecl;
79 class CodeCompleteConsumer;
80 class CodeCompletionAllocator;
81 class CodeCompletionTUInfo;
82 class CodeCompletionResult;
88 class DeducedTemplateArgument;
89 class DependentDiagnostic;
90 class DesignatedInitExpr;
92 class EnumConstantDecl;
95 class ExternalSemaSource;
99 class FunctionProtoType;
100 class FunctionTemplateDecl;
101 class ImplicitConversionSequence;
103 class InitializationKind;
104 class InitializationSequence;
105 class InitializedEntity;
106 class IntegerLiteral;
110 class LocalInstantiationScope;
113 class MultiLevelTemplateArgumentList;
116 class ObjCCategoryDecl;
117 class ObjCCategoryImplDecl;
118 class ObjCCompatibleAliasDecl;
119 class ObjCContainerDecl;
121 class ObjCImplementationDecl;
122 class ObjCInterfaceDecl;
124 template <class T> class ObjCList;
125 class ObjCMessageExpr;
126 class ObjCMethodDecl;
127 class ObjCPropertyDecl;
128 class ObjCProtocolDecl;
129 class OverloadCandidateSet;
134 class PseudoDestructorTypeStorage;
135 class PseudoObjectExpr;
137 class StandardConversionSequence;
141 class TargetAttributesSema;
142 class TemplateArgument;
143 class TemplateArgumentList;
144 class TemplateArgumentLoc;
146 class TemplateParameterList;
147 class TemplatePartialOrderingContext;
148 class TemplateTemplateParmDecl;
152 class TypedefNameDecl;
155 class UnresolvedLookupExpr;
156 class UnresolvedMemberExpr;
157 class UnresolvedSetImpl;
158 class UnresolvedSetIterator;
160 class UsingShadowDecl;
163 class VisibilityAttr;
164 class VisibleDeclConsumer;
165 class IndirectFieldDecl;
168 class AccessedEntity;
169 class BlockScopeInfo;
170 class CompoundScopeInfo;
171 class DelayedDiagnostic;
172 class FunctionScopeInfo;
173 class LambdaScopeInfo;
174 class PossiblyUnreachableDiag;
175 class TemplateDeductionInfo;
178 // FIXME: No way to easily map from TemplateTypeParmTypes to
179 // TemplateTypeParmDecls, so we have this horrible PointerUnion.
180 typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>,
181 SourceLocation> UnexpandedParameterPack;
183 /// Sema - This implements semantic analysis and AST building for C.
185 Sema(const Sema&); // DO NOT IMPLEMENT
186 void operator=(const Sema&); // DO NOT IMPLEMENT
187 mutable const TargetAttributesSema* TheTargetAttributesSema;
189 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
190 typedef OpaquePtr<TemplateName> TemplateTy;
191 typedef OpaquePtr<QualType> TypeTy;
193 OpenCLOptions OpenCLFeatures;
194 FPOptions FPFeatures;
196 const LangOptions &LangOpts;
199 ASTConsumer &Consumer;
200 DiagnosticsEngine &Diags;
201 SourceManager &SourceMgr;
203 /// \brief Flag indicating whether or not to collect detailed statistics.
206 /// \brief Source of additional semantic information.
207 ExternalSemaSource *ExternalSource;
209 /// \brief Code-completion consumer.
210 CodeCompleteConsumer *CodeCompleter;
212 /// CurContext - This is the current declaration context of parsing.
213 DeclContext *CurContext;
215 /// \brief Generally null except when we temporarily switch decl contexts,
216 /// like in \see ActOnObjCTemporaryExitContainerContext.
217 DeclContext *OriginalLexicalContext;
219 /// VAListTagName - The declaration name corresponding to __va_list_tag.
220 /// This is used as part of a hack to omit that class from ADL results.
221 DeclarationName VAListTagName;
223 /// PackContext - Manages the stack for #pragma pack. An alignment
224 /// of 0 indicates default alignment.
225 void *PackContext; // Really a "PragmaPackStack*"
227 bool MSStructPragmaOn; // True when #pragma ms_struct on
229 /// VisContext - Manages the stack for #pragma GCC visibility.
230 void *VisContext; // Really a "PragmaVisStack*"
232 /// ExprNeedsCleanups - True if the current evaluation context
233 /// requires cleanups to be run at its conclusion.
234 bool ExprNeedsCleanups;
236 /// ExprCleanupObjects - This is the stack of objects requiring
237 /// cleanup that are created by the current full expression. The
238 /// element type here is ExprWithCleanups::Object.
239 SmallVector<BlockDecl*, 8> ExprCleanupObjects;
241 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs;
243 /// \brief Stack containing information about each of the nested
244 /// function, block, and method scopes that are currently active.
246 /// This array is never empty. Clients should ignore the first
247 /// element, which is used to cache a single FunctionScopeInfo
248 /// that's used to parse every top-level function.
249 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes;
251 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource,
252 &ExternalSemaSource::ReadExtVectorDecls, 2, 2>
255 /// ExtVectorDecls - This is a list all the extended vector types. This allows
256 /// us to associate a raw vector type with one of the ext_vector type names.
257 /// This is only necessary for issuing pretty diagnostics.
258 ExtVectorDeclsType ExtVectorDecls;
260 /// \brief The set of types for which we have already complained about the
261 /// definitions being hidden.
263 /// This set is used to suppress redundant diagnostics.
264 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions;
266 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
267 OwningPtr<CXXFieldCollector> FieldCollector;
269 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy;
271 /// PureVirtualClassDiagSet - a set of class declarations which we have
272 /// emitted a list of pure virtual functions. Used to prevent emitting the
273 /// same list more than once.
274 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet;
276 /// ParsingInitForAutoVars - a set of declarations with auto types for which
277 /// we are currently parsing the initializer.
278 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars;
280 /// \brief A mapping from external names to the most recent
281 /// locally-scoped external declaration with that name.
283 /// This map contains external declarations introduced in local
288 /// void foo(int, int);
292 /// Here, the name "foo" will be associated with the declaration on
293 /// "foo" within f. This name is not visible outside of
294 /// "f". However, we still find it in two cases:
296 /// - If we are declaring another external with the name "foo", we
297 /// can find "foo" as a previous declaration, so that the types
298 /// of this external declaration can be checked for
301 /// - If we would implicitly declare "foo" (e.g., due to a call to
302 /// "foo" in C when no prototype or definition is visible), then
303 /// we find this declaration of "foo" and complain that it is
305 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls;
307 /// \brief Look for a locally scoped external declaration by the given name.
308 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator
309 findLocallyScopedExternalDecl(DeclarationName Name);
311 typedef LazyVector<VarDecl *, ExternalSemaSource,
312 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2>
313 TentativeDefinitionsType;
315 /// \brief All the tentative definitions encountered in the TU.
316 TentativeDefinitionsType TentativeDefinitions;
318 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource,
319 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2>
320 UnusedFileScopedDeclsType;
322 /// \brief The set of file scoped decls seen so far that have not been used
323 /// and must warn if not used. Only contains the first declaration.
324 UnusedFileScopedDeclsType UnusedFileScopedDecls;
326 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource,
327 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2>
328 DelegatingCtorDeclsType;
330 /// \brief All the delegating constructors seen so far in the file, used for
331 /// cycle detection at the end of the TU.
332 DelegatingCtorDeclsType DelegatingCtorDecls;
334 /// \brief All the destructors seen during a class definition that had their
335 /// exception spec computation delayed because it depended on an unparsed
337 SmallVector<CXXDestructorDecl*, 2> DelayedDestructorExceptionSpecs;
339 /// \brief All the overriding destructors seen during a class definition
340 /// (there could be multiple due to nested classes) that had their exception
341 /// spec checks delayed, plus the overridden destructor.
342 SmallVector<std::pair<const CXXDestructorDecl*,
343 const CXXDestructorDecl*>, 2>
344 DelayedDestructorExceptionSpecChecks;
346 /// \brief Callback to the parser to parse templated functions when needed.
347 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD);
348 LateTemplateParserCB *LateTemplateParser;
351 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) {
352 LateTemplateParser = LTP;
356 class DelayedDiagnostics;
358 class ParsingDeclState {
359 unsigned SavedStackSize;
360 friend class Sema::DelayedDiagnostics;
363 class ProcessingContextState {
364 unsigned SavedParsingDepth;
365 unsigned SavedActiveStackBase;
366 friend class Sema::DelayedDiagnostics;
369 /// A class which encapsulates the logic for delaying diagnostics
370 /// during parsing and other processing.
371 class DelayedDiagnostics {
372 /// \brief The stack of diagnostics that were delayed due to being
373 /// produced during the parsing of a declaration.
374 sema::DelayedDiagnostic *Stack;
376 /// \brief The number of objects on the delayed-diagnostics stack.
379 /// \brief The current capacity of the delayed-diagnostics stack.
380 unsigned StackCapacity;
382 /// \brief The index of the first "active" delayed diagnostic in
383 /// the stack. When parsing class definitions, we ignore active
384 /// delayed diagnostics from the surrounding context.
385 unsigned ActiveStackBase;
387 /// \brief The depth of the declarations we're currently parsing.
388 /// This gets saved and reset whenever we enter a class definition.
389 unsigned ParsingDepth;
392 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0),
393 ActiveStackBase(0), ParsingDepth(0) {}
395 ~DelayedDiagnostics() {
396 delete[] reinterpret_cast<char*>(Stack);
399 /// Adds a delayed diagnostic.
400 void add(const sema::DelayedDiagnostic &diag);
402 /// Determines whether diagnostics should be delayed.
403 bool shouldDelayDiagnostics() { return ParsingDepth > 0; }
405 /// Observe that we've started parsing a declaration. Access and
406 /// deprecation diagnostics will be delayed; when the declaration
407 /// is completed, all active delayed diagnostics will be evaluated
408 /// in its context, and then active diagnostics stack will be
409 /// popped down to the saved depth.
410 ParsingDeclState pushParsingDecl() {
413 ParsingDeclState state;
414 state.SavedStackSize = StackSize;
418 /// Observe that we're completed parsing a declaration.
419 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl);
421 /// Observe that we've started processing a different context, the
422 /// contents of which are semantically separate from the
423 /// declarations it may lexically appear in. This sets aside the
424 /// current stack of active diagnostics and starts afresh.
425 ProcessingContextState pushContext() {
426 assert(StackSize >= ActiveStackBase);
428 ProcessingContextState state;
429 state.SavedParsingDepth = ParsingDepth;
430 state.SavedActiveStackBase = ActiveStackBase;
432 ActiveStackBase = StackSize;
438 /// Observe that we've stopped processing a context. This
439 /// restores the previous stack of active diagnostics.
440 void popContext(ProcessingContextState state) {
441 assert(ActiveStackBase == StackSize);
442 assert(ParsingDepth == 0);
443 ActiveStackBase = state.SavedActiveStackBase;
444 ParsingDepth = state.SavedParsingDepth;
446 } DelayedDiagnostics;
448 /// A RAII object to temporarily push a declaration context.
452 DeclContext *SavedContext;
453 ProcessingContextState SavedContextState;
454 QualType SavedCXXThisTypeOverride;
457 ContextRAII(Sema &S, DeclContext *ContextToPush)
458 : S(S), SavedContext(S.CurContext),
459 SavedContextState(S.DelayedDiagnostics.pushContext()),
460 SavedCXXThisTypeOverride(S.CXXThisTypeOverride)
462 assert(ContextToPush && "pushing null context");
463 S.CurContext = ContextToPush;
467 if (!SavedContext) return;
468 S.CurContext = SavedContext;
469 S.DelayedDiagnostics.popContext(SavedContextState);
470 S.CXXThisTypeOverride = SavedCXXThisTypeOverride;
479 /// WeakUndeclaredIdentifiers - Identifiers contained in
480 /// #pragma weak before declared. rare. may alias another
481 /// identifier, declared or undeclared
482 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers;
484 /// ExtnameUndeclaredIdentifiers - Identifiers contained in
485 /// #pragma redefine_extname before declared. Used in Solaris system headers
486 /// to define functions that occur in multiple standards to call the version
487 /// in the currently selected standard.
488 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers;
491 /// \brief Load weak undeclared identifiers from the external source.
492 void LoadExternalWeakUndeclaredIdentifiers();
494 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by
495 /// #pragma weak during processing of other Decls.
496 /// I couldn't figure out a clean way to generate these in-line, so
497 /// we store them here and handle separately -- which is a hack.
498 /// It would be best to refactor this.
499 SmallVector<Decl*,2> WeakTopLevelDecl;
501 IdentifierResolver IdResolver;
503 /// Translation Unit Scope - useful to Objective-C actions that need
504 /// to lookup file scope declarations in the "ordinary" C decl namespace.
505 /// For example, user-defined classes, built-in "id" type, etc.
508 /// \brief The C++ "std" namespace, where the standard library resides.
509 LazyDeclPtr StdNamespace;
511 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++
512 /// standard library.
513 LazyDeclPtr StdBadAlloc;
515 /// \brief The C++ "std::initializer_list" template, which is defined in
516 /// <initializer_list>.
517 ClassTemplateDecl *StdInitializerList;
519 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>.
520 RecordDecl *CXXTypeInfoDecl;
522 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files.
523 RecordDecl *MSVCGuidDecl;
525 /// \brief Caches identifiers/selectors for NSFoundation APIs.
526 llvm::OwningPtr<NSAPI> NSAPIObj;
528 /// \brief The declaration of the Objective-C NSNumber class.
529 ObjCInterfaceDecl *NSNumberDecl;
531 /// \brief The Objective-C NSNumber methods used to create NSNumber literals.
532 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods];
534 /// \brief The declaration of the Objective-C NSArray class.
535 ObjCInterfaceDecl *NSArrayDecl;
537 /// \brief The declaration of the arrayWithObjects:count: method.
538 ObjCMethodDecl *ArrayWithObjectsMethod;
540 /// \brief The declaration of the Objective-C NSDictionary class.
541 ObjCInterfaceDecl *NSDictionaryDecl;
543 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method.
544 ObjCMethodDecl *DictionaryWithObjectsMethod;
546 /// \brief id<NSCopying> type.
547 QualType QIDNSCopying;
549 /// A flag to remember whether the implicit forms of operator new and delete
550 /// have been declared.
551 bool GlobalNewDeleteDeclared;
553 /// A flag that is set when parsing a -dealloc method and no [super dealloc]
554 /// call was found yet.
555 bool ObjCShouldCallSuperDealloc;
556 /// A flag that is set when parsing a -finalize method and no [super finalize]
557 /// call was found yet.
558 bool ObjCShouldCallSuperFinalize;
560 /// \brief Describes how the expressions currently being parsed are
561 /// evaluated at run-time, if at all.
562 enum ExpressionEvaluationContext {
563 /// \brief The current expression and its subexpressions occur within an
564 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of
565 /// \c sizeof, where the type of the expression may be significant but
566 /// no code will be generated to evaluate the value of the expression at
570 /// \brief The current context is "potentially evaluated" in C++11 terms,
571 /// but the expression is evaluated at compile-time (like the values of
572 /// cases in a switch statment).
575 /// \brief The current expression is potentially evaluated at run time,
576 /// which means that code may be generated to evaluate the value of the
577 /// expression at run time.
578 PotentiallyEvaluated,
580 /// \brief The current expression is potentially evaluated, but any
581 /// declarations referenced inside that expression are only used if
582 /// in fact the current expression is used.
584 /// This value is used when parsing default function arguments, for which
585 /// we would like to provide diagnostics (e.g., passing non-POD arguments
586 /// through varargs) but do not want to mark declarations as "referenced"
587 /// until the default argument is used.
588 PotentiallyEvaluatedIfUsed
591 /// \brief Data structure used to record current or nested
592 /// expression evaluation contexts.
593 struct ExpressionEvaluationContextRecord {
594 /// \brief The expression evaluation context.
595 ExpressionEvaluationContext Context;
597 /// \brief Whether the enclosing context needed a cleanup.
598 bool ParentNeedsCleanups;
600 /// \brief Whether we are in a decltype expression.
603 /// \brief The number of active cleanup objects when we entered
604 /// this expression evaluation context.
605 unsigned NumCleanupObjects;
607 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs;
609 /// \brief The lambdas that are present within this context, if it
610 /// is indeed an unevaluated context.
611 llvm::SmallVector<LambdaExpr *, 2> Lambdas;
613 /// \brief The declaration that provides context for the lambda expression
614 /// if the normal declaration context does not suffice, e.g., in a
615 /// default function argument.
616 Decl *LambdaContextDecl;
618 /// \brief The context information used to mangle lambda expressions
619 /// within this context.
621 /// This mangling information is allocated lazily, since most contexts
622 /// do not have lambda expressions.
623 LambdaMangleContext *LambdaMangle;
625 /// \brief If we are processing a decltype type, a set of call expressions
626 /// for which we have deferred checking the completeness of the return type.
627 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls;
629 /// \brief If we are processing a decltype type, a set of temporary binding
630 /// expressions for which we have deferred checking the destructor.
631 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds;
633 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
634 unsigned NumCleanupObjects,
635 bool ParentNeedsCleanups,
636 Decl *LambdaContextDecl,
638 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups),
639 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
640 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { }
642 ~ExpressionEvaluationContextRecord() {
646 /// \brief Retrieve the mangling context for lambdas.
647 LambdaMangleContext &getLambdaMangleContext() {
648 assert(LambdaContextDecl && "Need to have a lambda context declaration");
650 LambdaMangle = new LambdaMangleContext;
651 return *LambdaMangle;
655 /// A stack of expression evaluation contexts.
656 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts;
658 /// SpecialMemberOverloadResult - The overloading result for a special member
661 /// This is basically a wrapper around PointerIntPair. The lowest bits of the
662 /// integer are used to determine whether overload resolution succeeded, and
663 /// whether, when looking up a copy constructor or assignment operator, we
664 /// found a potential copy constructor/assignment operator whose first
665 /// parameter is const-qualified. This is used for determining parameter types
666 /// of other objects and is utterly meaningless on other types of special
668 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode {
677 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair;
680 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID)
681 : FastFoldingSetNode(ID)
684 CXXMethodDecl *getMethod() const { return Pair.getPointer(); }
685 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); }
687 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); }
688 void setKind(Kind K) { Pair.setInt(K); }
691 /// \brief A cache of special member function overload resolution results
693 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache;
695 /// \brief The kind of translation unit we are processing.
697 /// When we're processing a complete translation unit, Sema will perform
698 /// end-of-translation-unit semantic tasks (such as creating
699 /// initializers for tentative definitions in C) once parsing has
700 /// completed. Modules and precompiled headers perform different kinds of
702 TranslationUnitKind TUKind;
704 llvm::BumpPtrAllocator BumpAlloc;
706 /// \brief The number of SFINAE diagnostics that have been trapped.
707 unsigned NumSFINAEErrors;
709 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> >
710 UnparsedDefaultArgInstantiationsMap;
712 /// \brief A mapping from parameters with unparsed default arguments to the
713 /// set of instantiations of each parameter.
715 /// This mapping is a temporary data structure used when parsing
716 /// nested class templates or nested classes of class templates,
717 /// where we might end up instantiating an inner class before the
718 /// default arguments of its methods have been parsed.
719 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations;
721 // Contains the locations of the beginning of unparsed default
722 // argument locations.
723 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs;
725 /// UndefinedInternals - all the used, undefined objects with
726 /// internal linkage in this translation unit.
727 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals;
729 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
730 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
732 /// Method Pool - allows efficient lookup when typechecking messages to "id".
733 /// We need to maintain a list, since selectors can have differing signatures
734 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1%
735 /// of selectors are "overloaded").
736 GlobalMethodPool MethodPool;
738 /// Method selectors used in a @selector expression. Used for implementation
740 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors;
742 void ReadMethodPool(Selector Sel);
744 /// Private Helper predicate to check for 'self'.
745 bool isSelfExpr(Expr *RExpr);
747 /// \brief Cause the active diagnostic on the DiagosticsEngine to be
748 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and
749 /// should not be used elsewhere.
750 void EmitCurrentDiagnostic(unsigned DiagID);
753 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
754 TranslationUnitKind TUKind = TU_Complete,
755 CodeCompleteConsumer *CompletionConsumer = 0);
758 /// \brief Perform initialization that occurs after the parser has been
759 /// initialized but before it parses anything.
762 const LangOptions &getLangOpts() const { return LangOpts; }
763 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; }
764 FPOptions &getFPOptions() { return FPFeatures; }
766 DiagnosticsEngine &getDiagnostics() const { return Diags; }
767 SourceManager &getSourceManager() const { return SourceMgr; }
768 const TargetAttributesSema &getTargetAttributesSema() const;
769 Preprocessor &getPreprocessor() const { return PP; }
770 ASTContext &getASTContext() const { return Context; }
771 ASTConsumer &getASTConsumer() const { return Consumer; }
772 ASTMutationListener *getASTMutationListener() const;
774 void PrintStats() const;
776 /// \brief Helper class that creates diagnostics with optional
777 /// template instantiation stacks.
779 /// This class provides a wrapper around the basic DiagnosticBuilder
780 /// class that emits diagnostics. SemaDiagnosticBuilder is
781 /// responsible for emitting the diagnostic (as DiagnosticBuilder
782 /// does) and, if the diagnostic comes from inside a template
783 /// instantiation, printing the template instantiation stack as
785 class SemaDiagnosticBuilder : public DiagnosticBuilder {
790 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID)
791 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { }
793 ~SemaDiagnosticBuilder() {
794 // If we aren't active, there is nothing to do.
795 if (!isActive()) return;
797 // Otherwise, we need to emit the diagnostic. First flush the underlying
798 // DiagnosticBuilder data, and clear the diagnostic builder itself so it
799 // won't emit the diagnostic in its own destructor.
801 // This seems wasteful, in that as written the DiagnosticBuilder dtor will
802 // do its own needless checks to see if the diagnostic needs to be
803 // emitted. However, because we take care to ensure that the builder
804 // objects never escape, a sufficiently smart compiler will be able to
805 // eliminate that code.
809 // Dispatch to Sema to emit the diagnostic.
810 SemaRef.EmitCurrentDiagnostic(DiagID);
814 /// \brief Emit a diagnostic.
815 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
816 DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
817 return SemaDiagnosticBuilder(DB, *this, DiagID);
820 /// \brief Emit a partial diagnostic.
821 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD);
823 /// \brief Build a partial diagnostic.
824 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h
826 bool findMacroSpelling(SourceLocation &loc, StringRef name);
828 /// \brief Get a string to suggest for zero-initialization of a type.
829 const char *getFixItZeroInitializerForType(QualType T) const;
831 ExprResult Owned(Expr* E) { return E; }
832 ExprResult Owned(ExprResult R) { return R; }
833 StmtResult Owned(Stmt* S) { return S; }
835 void ActOnEndOfTranslationUnit();
837 void CheckDelegatingCtorCycles();
839 Scope *getScopeForContext(DeclContext *Ctx);
841 void PushFunctionScope();
842 void PushBlockScope(Scope *BlockScope, BlockDecl *Block);
843 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator);
844 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0,
845 const Decl *D = 0, const BlockExpr *blkExpr = 0);
847 sema::FunctionScopeInfo *getCurFunction() const {
848 return FunctionScopes.back();
851 void PushCompoundScope();
852 void PopCompoundScope();
854 sema::CompoundScopeInfo &getCurCompoundScope() const;
856 bool hasAnyUnrecoverableErrorsInThisFunction() const;
858 /// \brief Retrieve the current block, if any.
859 sema::BlockScopeInfo *getCurBlock();
861 /// \brief Retrieve the current lambda expression, if any.
862 sema::LambdaScopeInfo *getCurLambda();
864 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls
865 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; }
867 //===--------------------------------------------------------------------===//
868 // Type Analysis / Processing: SemaType.cpp.
871 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs);
872 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) {
873 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR));
875 QualType BuildPointerType(QualType T,
876 SourceLocation Loc, DeclarationName Entity);
877 QualType BuildReferenceType(QualType T, bool LValueRef,
878 SourceLocation Loc, DeclarationName Entity);
879 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
880 Expr *ArraySize, unsigned Quals,
881 SourceRange Brackets, DeclarationName Entity);
882 QualType BuildExtVectorType(QualType T, Expr *ArraySize,
883 SourceLocation AttrLoc);
884 QualType BuildFunctionType(QualType T,
885 QualType *ParamTypes, unsigned NumParamTypes,
886 bool Variadic, bool HasTrailingReturn,
887 unsigned Quals, RefQualifierKind RefQualifier,
888 SourceLocation Loc, DeclarationName Entity,
889 FunctionType::ExtInfo Info);
890 QualType BuildMemberPointerType(QualType T, QualType Class,
892 DeclarationName Entity);
893 QualType BuildBlockPointerType(QualType T,
894 SourceLocation Loc, DeclarationName Entity);
895 QualType BuildParenType(QualType T);
896 QualType BuildAtomicType(QualType T, SourceLocation Loc);
898 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S);
899 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy);
900 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
901 TypeSourceInfo *ReturnTypeInfo);
903 /// \brief Package the given type and TSI into a ParsedType.
904 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo);
905 DeclarationNameInfo GetNameForDeclarator(Declarator &D);
906 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name);
907 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0);
908 CanThrowResult canThrow(const Expr *E);
909 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
910 const FunctionProtoType *FPT);
911 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range);
912 bool CheckDistantExceptionSpec(QualType T);
913 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
914 bool CheckEquivalentExceptionSpec(
915 const FunctionProtoType *Old, SourceLocation OldLoc,
916 const FunctionProtoType *New, SourceLocation NewLoc);
917 bool CheckEquivalentExceptionSpec(
918 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
919 const FunctionProtoType *Old, SourceLocation OldLoc,
920 const FunctionProtoType *New, SourceLocation NewLoc,
921 bool *MissingExceptionSpecification = 0,
922 bool *MissingEmptyExceptionSpecification = 0,
923 bool AllowNoexceptAllMatchWithNoSpec = false,
924 bool IsOperatorNew = false);
925 bool CheckExceptionSpecSubset(
926 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
927 const FunctionProtoType *Superset, SourceLocation SuperLoc,
928 const FunctionProtoType *Subset, SourceLocation SubLoc);
929 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID,
930 const FunctionProtoType *Target, SourceLocation TargetLoc,
931 const FunctionProtoType *Source, SourceLocation SourceLoc);
933 TypeResult ActOnTypeName(Scope *S, Declarator &D);
935 /// \brief The parser has parsed the context-sensitive type 'instancetype'
936 /// in an Objective-C message declaration. Return the appropriate type.
937 ParsedType ActOnObjCInstanceType(SourceLocation Loc);
939 bool RequireCompleteType(SourceLocation Loc, QualType T,
940 const PartialDiagnostic &PD,
941 std::pair<SourceLocation, PartialDiagnostic> Note);
942 bool RequireCompleteType(SourceLocation Loc, QualType T,
943 const PartialDiagnostic &PD);
944 bool RequireCompleteType(SourceLocation Loc, QualType T,
946 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD,
947 std::pair<SourceLocation,
948 PartialDiagnostic> Note);
950 bool RequireLiteralType(SourceLocation Loc, QualType T,
951 const PartialDiagnostic &PD);
953 QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
954 const CXXScopeSpec &SS, QualType T);
956 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc);
957 QualType BuildDecltypeType(Expr *E, SourceLocation Loc);
958 QualType BuildUnaryTransformType(QualType BaseType,
959 UnaryTransformType::UTTKind UKind,
962 //===--------------------------------------------------------------------===//
963 // Symbol table / Decl tracking callbacks: SemaDecl.cpp.
966 /// List of decls defined in a function prototype. This contains EnumConstants
967 /// that incorrectly end up in translation unit scope because there is no
968 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches
969 /// them into the FunctionDecl.
970 std::vector<NamedDecl*> DeclsInPrototypeScope;
971 /// Nonzero if we are currently parsing a function declarator. This is a counter
972 /// as opposed to a boolean so we can deal with nested function declarators
974 /// void f(void (*g)(), ...)
975 unsigned InFunctionDeclarator;
977 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0);
979 void DiagnoseUseOfUnimplementedSelectors();
981 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc,
982 Scope *S, CXXScopeSpec *SS = 0,
983 bool isClassName = false,
984 bool HasTrailingDot = false,
985 ParsedType ObjectType = ParsedType(),
986 bool IsCtorOrDtorName = false,
987 bool WantNontrivialTypeSourceInfo = false,
988 IdentifierInfo **CorrectedII = 0);
989 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S);
990 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S);
991 bool DiagnoseUnknownTypeName(const IdentifierInfo &II,
992 SourceLocation IILoc,
995 ParsedType &SuggestedType);
997 /// \brief Describes the result of the name lookup and resolution performed
998 /// by \c ClassifyName().
999 enum NameClassificationKind {
1005 NC_NestedNameSpecifier,
1010 class NameClassification {
1011 NameClassificationKind Kind;
1013 TemplateName Template;
1015 const IdentifierInfo *Keyword;
1017 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {}
1020 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {}
1022 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {}
1024 NameClassification(const IdentifierInfo *Keyword)
1025 : Kind(NC_Keyword), Keyword(Keyword) { }
1027 static NameClassification Error() {
1028 return NameClassification(NC_Error);
1031 static NameClassification Unknown() {
1032 return NameClassification(NC_Unknown);
1035 static NameClassification NestedNameSpecifier() {
1036 return NameClassification(NC_NestedNameSpecifier);
1039 static NameClassification TypeTemplate(TemplateName Name) {
1040 NameClassification Result(NC_TypeTemplate);
1041 Result.Template = Name;
1045 static NameClassification FunctionTemplate(TemplateName Name) {
1046 NameClassification Result(NC_FunctionTemplate);
1047 Result.Template = Name;
1051 NameClassificationKind getKind() const { return Kind; }
1053 ParsedType getType() const {
1054 assert(Kind == NC_Type);
1058 ExprResult getExpression() const {
1059 assert(Kind == NC_Expression);
1063 TemplateName getTemplateName() const {
1064 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1068 TemplateNameKind getTemplateNameKind() const {
1069 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1070 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template;
1074 /// \brief Perform name lookup on the given name, classifying it based on
1075 /// the results of name lookup and the following token.
1077 /// This routine is used by the parser to resolve identifiers and help direct
1078 /// parsing. When the identifier cannot be found, this routine will attempt
1079 /// to correct the typo and classify based on the resulting name.
1081 /// \param S The scope in which we're performing name lookup.
1083 /// \param SS The nested-name-specifier that precedes the name.
1085 /// \param Name The identifier. If typo correction finds an alternative name,
1086 /// this pointer parameter will be updated accordingly.
1088 /// \param NameLoc The location of the identifier.
1090 /// \param NextToken The token following the identifier. Used to help
1091 /// disambiguate the name.
1092 NameClassification ClassifyName(Scope *S,
1094 IdentifierInfo *&Name,
1095 SourceLocation NameLoc,
1096 const Token &NextToken);
1098 Decl *ActOnDeclarator(Scope *S, Declarator &D);
1100 Decl *HandleDeclarator(Scope *S, Declarator &D,
1101 MultiTemplateParamsArg TemplateParameterLists);
1102 void RegisterLocallyScopedExternCDecl(NamedDecl *ND,
1103 const LookupResult &Previous,
1105 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info);
1106 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
1107 DeclarationName Name,
1108 SourceLocation Loc);
1109 void DiagnoseFunctionSpecifiers(Declarator& D);
1110 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R);
1111 void CheckShadow(Scope *S, VarDecl *D);
1112 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
1113 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D);
1114 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1115 TypeSourceInfo *TInfo,
1116 LookupResult &Previous);
1117 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D,
1118 LookupResult &Previous, bool &Redeclaration);
1119 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1120 TypeSourceInfo *TInfo,
1121 LookupResult &Previous,
1122 MultiTemplateParamsArg TemplateParamLists);
1123 // Returns true if the variable declaration is a redeclaration
1124 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
1125 void CheckCompleteVariableDeclaration(VarDecl *var);
1126 void ActOnStartFunctionDeclarator();
1127 void ActOnEndFunctionDeclarator();
1128 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1129 TypeSourceInfo *TInfo,
1130 LookupResult &Previous,
1131 MultiTemplateParamsArg TemplateParamLists,
1133 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1135 bool CheckConstexprFunctionDecl(const FunctionDecl *FD);
1136 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body);
1138 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1139 // Returns true if the function declaration is a redeclaration
1140 bool CheckFunctionDeclaration(Scope *S,
1141 FunctionDecl *NewFD, LookupResult &Previous,
1142 bool IsExplicitSpecialization);
1143 void CheckMain(FunctionDecl *FD, const DeclSpec &D);
1144 Decl *ActOnParamDeclarator(Scope *S, Declarator &D);
1145 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC,
1148 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
1149 SourceLocation NameLoc, IdentifierInfo *Name,
1150 QualType T, TypeSourceInfo *TSInfo,
1151 StorageClass SC, StorageClass SCAsWritten);
1152 void ActOnParamDefaultArgument(Decl *param,
1153 SourceLocation EqualLoc,
1155 void ActOnParamUnparsedDefaultArgument(Decl *param,
1156 SourceLocation EqualLoc,
1157 SourceLocation ArgLoc);
1158 void ActOnParamDefaultArgumentError(Decl *param);
1159 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg,
1160 SourceLocation EqualLoc);
1162 void CheckSelfReference(Decl *OrigDecl, Expr *E);
1163 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit,
1164 bool TypeMayContainAuto);
1165 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto);
1166 void ActOnInitializerError(Decl *Dcl);
1167 void ActOnCXXForRangeDecl(Decl *D);
1168 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc);
1169 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc);
1170 void FinalizeDeclaration(Decl *D);
1171 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS,
1174 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls,
1175 bool TypeMayContainAuto = true);
1176 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
1177 SourceLocation LocAfterDecls);
1178 void CheckForFunctionRedefinition(FunctionDecl *FD);
1179 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D);
1180 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D);
1181 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
1183 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
1184 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
1185 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
1187 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
1188 /// attribute for which parsing is delayed.
1189 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs);
1191 /// \brief Diagnose any unused parameters in the given sequence of
1192 /// ParmVarDecl pointers.
1193 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin,
1194 ParmVarDecl * const *End);
1196 /// \brief Diagnose whether the size of parameters or return value of a
1197 /// function or obj-c method definition is pass-by-value and larger than a
1198 /// specified threshold.
1199 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin,
1200 ParmVarDecl * const *End,
1204 void DiagnoseInvalidJumps(Stmt *Body);
1205 Decl *ActOnFileScopeAsmDecl(Expr *expr,
1206 SourceLocation AsmLoc,
1207 SourceLocation RParenLoc);
1209 /// \brief The parser has processed a module import declaration.
1211 /// \param AtLoc The location of the '@' symbol, if any.
1213 /// \param ImportLoc The location of the 'import' keyword.
1215 /// \param Path The module access path.
1216 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
1219 /// \brief Retrieve a suitable printing policy.
1220 PrintingPolicy getPrintingPolicy() const {
1221 return getPrintingPolicy(Context, PP);
1224 /// \brief Retrieve a suitable printing policy.
1225 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx,
1226 const Preprocessor &PP);
1229 void ActOnPopScope(SourceLocation Loc, Scope *S);
1230 void ActOnTranslationUnitScope(Scope *S);
1232 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1234 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1236 MultiTemplateParamsArg TemplateParams);
1238 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
1240 RecordDecl *Record);
1242 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
1243 RecordDecl *Record);
1245 bool isAcceptableTagRedeclaration(const TagDecl *Previous,
1246 TagTypeKind NewTag, bool isDefinition,
1247 SourceLocation NewTagLoc,
1248 const IdentifierInfo &Name);
1251 TUK_Reference, // Reference to a tag: 'struct foo *X;'
1252 TUK_Declaration, // Fwd decl of a tag: 'struct foo;'
1253 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;'
1254 TUK_Friend // Friend declaration: 'friend struct foo;'
1257 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
1258 SourceLocation KWLoc, CXXScopeSpec &SS,
1259 IdentifierInfo *Name, SourceLocation NameLoc,
1260 AttributeList *Attr, AccessSpecifier AS,
1261 SourceLocation ModulePrivateLoc,
1262 MultiTemplateParamsArg TemplateParameterLists,
1263 bool &OwnedDecl, bool &IsDependent,
1264 SourceLocation ScopedEnumKWLoc,
1265 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType);
1267 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
1268 unsigned TagSpec, SourceLocation TagLoc,
1270 IdentifierInfo *Name, SourceLocation NameLoc,
1271 AttributeList *Attr,
1272 MultiTemplateParamsArg TempParamLists);
1274 TypeResult ActOnDependentTag(Scope *S,
1277 const CXXScopeSpec &SS,
1278 IdentifierInfo *Name,
1279 SourceLocation TagLoc,
1280 SourceLocation NameLoc);
1282 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart,
1283 IdentifierInfo *ClassName,
1284 SmallVectorImpl<Decl *> &Decls);
1285 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart,
1286 Declarator &D, Expr *BitfieldWidth);
1288 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart,
1289 Declarator &D, Expr *BitfieldWidth, bool HasInit,
1290 AccessSpecifier AS);
1292 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T,
1293 TypeSourceInfo *TInfo,
1294 RecordDecl *Record, SourceLocation Loc,
1295 bool Mutable, Expr *BitfieldWidth, bool HasInit,
1296 SourceLocation TSSL,
1297 AccessSpecifier AS, NamedDecl *PrevDecl,
1300 enum CXXSpecialMember {
1301 CXXDefaultConstructor,
1309 bool CheckNontrivialField(FieldDecl *FD);
1310 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem);
1311 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
1312 void ActOnLastBitfield(SourceLocation DeclStart,
1313 SmallVectorImpl<Decl *> &AllIvarDecls);
1314 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart,
1315 Declarator &D, Expr *BitfieldWidth,
1316 tok::ObjCKeywordKind visibility);
1318 // This is used for both record definitions and ObjC interface declarations.
1319 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
1320 llvm::ArrayRef<Decl *> Fields,
1321 SourceLocation LBrac, SourceLocation RBrac,
1322 AttributeList *AttrList);
1324 /// ActOnTagStartDefinition - Invoked when we have entered the
1325 /// scope of a tag's definition (e.g., for an enumeration, class,
1326 /// struct, or union).
1327 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl);
1329 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl);
1331 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a
1332 /// C++ record definition's base-specifiers clause and are starting its
1333 /// member declarations.
1334 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl,
1335 SourceLocation FinalLoc,
1336 SourceLocation LBraceLoc);
1338 /// ActOnTagFinishDefinition - Invoked once we have finished parsing
1339 /// the definition of a tag (enumeration, class, struct, or union).
1340 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl,
1341 SourceLocation RBraceLoc);
1343 void ActOnObjCContainerFinishDefinition();
1345 /// \brief Invoked when we must temporarily exit the objective-c container
1346 /// scope for parsing/looking-up C constructs.
1348 /// Must be followed by a call to \see ActOnObjCReenterContainerContext
1349 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC);
1350 void ActOnObjCReenterContainerContext(DeclContext *DC);
1352 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable
1353 /// error parsing the definition of a tag.
1354 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl);
1356 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum,
1357 EnumConstantDecl *LastEnumConst,
1358 SourceLocation IdLoc,
1361 bool CheckEnumUnderlyingType(TypeSourceInfo *TI);
1362 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
1363 QualType EnumUnderlyingTy, const EnumDecl *Prev);
1365 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant,
1366 SourceLocation IdLoc, IdentifierInfo *Id,
1367 AttributeList *Attrs,
1368 SourceLocation EqualLoc, Expr *Val);
1369 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
1370 SourceLocation RBraceLoc, Decl *EnumDecl,
1371 Decl **Elements, unsigned NumElements,
1372 Scope *S, AttributeList *Attr);
1374 DeclContext *getContainingDC(DeclContext *DC);
1376 /// Set the current declaration context until it gets popped.
1377 void PushDeclContext(Scope *S, DeclContext *DC);
1378 void PopDeclContext();
1380 /// EnterDeclaratorContext - Used when we must lookup names in the context
1381 /// of a declarator's nested name specifier.
1382 void EnterDeclaratorContext(Scope *S, DeclContext *DC);
1383 void ExitDeclaratorContext(Scope *S);
1385 /// Push the parameters of D, which must be a function, into scope.
1386 void ActOnReenterFunctionContext(Scope* S, Decl* D);
1387 void ActOnExitFunctionContext();
1389 DeclContext *getFunctionLevelDeclContext();
1391 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
1392 /// to the function decl for the function being parsed. If we're currently
1393 /// in a 'block', this returns the containing context.
1394 FunctionDecl *getCurFunctionDecl();
1396 /// getCurMethodDecl - If inside of a method body, this returns a pointer to
1397 /// the method decl for the method being parsed. If we're currently
1398 /// in a 'block', this returns the containing context.
1399 ObjCMethodDecl *getCurMethodDecl();
1401 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method
1402 /// or C function we're in, otherwise return null. If we're currently
1403 /// in a 'block', this returns the containing context.
1404 NamedDecl *getCurFunctionOrMethodDecl();
1406 /// Add this decl to the scope shadowed decl chains.
1407 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true);
1409 /// \brief Make the given externally-produced declaration visible at the
1410 /// top level scope.
1412 /// \param D The externally-produced declaration to push.
1414 /// \param Name The name of the externally-produced declaration.
1415 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name);
1417 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
1418 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
1419 /// true if 'D' belongs to the given declaration context.
1421 /// \param ExplicitInstantiationOrSpecialization When true, we are checking
1422 /// whether the declaration is in scope for the purposes of explicit template
1423 /// instantiation or specialization. The default is false.
1424 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0,
1425 bool ExplicitInstantiationOrSpecialization = false);
1427 /// Finds the scope corresponding to the given decl context, if it
1428 /// happens to be an enclosing scope. Otherwise return NULL.
1429 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC);
1431 /// Subroutines of ActOnDeclarator().
1432 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
1433 TypeSourceInfo *TInfo);
1434 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
1435 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true);
1436 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls);
1437 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S);
1438 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
1440 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
1441 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls);
1442 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old);
1443 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
1444 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
1446 // AssignmentAction - This is used by all the assignment diagnostic functions
1447 // to represent what is actually causing the operation
1448 enum AssignmentAction {
1458 /// C++ Overloading.
1460 /// This is a legitimate overload: the existing declarations are
1461 /// functions or function templates with different signatures.
1464 /// This is not an overload because the signature exactly matches
1465 /// an existing declaration.
1468 /// This is not an overload because the lookup results contain a
1472 OverloadKind CheckOverload(Scope *S,
1474 const LookupResult &OldDecls,
1475 NamedDecl *&OldDecl,
1476 bool IsForUsingDecl);
1477 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl);
1479 /// \brief Checks availability of the function depending on the current
1480 /// function context.Inside an unavailable function,unavailability is ignored.
1482 /// \returns true if \arg FD is unavailable and current context is inside
1483 /// an available function, false otherwise.
1484 bool isFunctionConsideredUnavailable(FunctionDecl *FD);
1486 ImplicitConversionSequence
1487 TryImplicitConversion(Expr *From, QualType ToType,
1488 bool SuppressUserConversions,
1490 bool InOverloadResolution,
1492 bool AllowObjCWritebackConversion);
1494 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType);
1495 bool IsFloatingPointPromotion(QualType FromType, QualType ToType);
1496 bool IsComplexPromotion(QualType FromType, QualType ToType);
1497 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
1498 bool InOverloadResolution,
1499 QualType& ConvertedType, bool &IncompatibleObjC);
1500 bool isObjCPointerConversion(QualType FromType, QualType ToType,
1501 QualType& ConvertedType, bool &IncompatibleObjC);
1502 bool isObjCWritebackConversion(QualType FromType, QualType ToType,
1503 QualType &ConvertedType);
1504 bool IsBlockPointerConversion(QualType FromType, QualType ToType,
1505 QualType& ConvertedType);
1506 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType,
1507 const FunctionProtoType *NewType,
1508 unsigned *ArgPos = 0);
1509 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
1510 QualType FromType, QualType ToType);
1512 CastKind PrepareCastToObjCObjectPointer(ExprResult &E);
1513 bool CheckPointerConversion(Expr *From, QualType ToType,
1515 CXXCastPath& BasePath,
1516 bool IgnoreBaseAccess);
1517 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
1518 bool InOverloadResolution,
1519 QualType &ConvertedType);
1520 bool CheckMemberPointerConversion(Expr *From, QualType ToType,
1522 CXXCastPath &BasePath,
1523 bool IgnoreBaseAccess);
1524 bool IsQualificationConversion(QualType FromType, QualType ToType,
1525 bool CStyle, bool &ObjCLifetimeConversion);
1526 bool IsNoReturnConversion(QualType FromType, QualType ToType,
1527 QualType &ResultTy);
1528 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType);
1531 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity,
1532 const VarDecl *NRVOCandidate,
1533 QualType ResultType,
1535 bool AllowNRVO = true);
1537 bool CanPerformCopyInitialization(const InitializedEntity &Entity,
1539 ExprResult PerformCopyInitialization(const InitializedEntity &Entity,
1540 SourceLocation EqualLoc,
1542 bool TopLevelOfInitList = false,
1543 bool AllowExplicit = false);
1544 ExprResult PerformObjectArgumentInitialization(Expr *From,
1545 NestedNameSpecifier *Qualifier,
1546 NamedDecl *FoundDecl,
1547 CXXMethodDecl *Method);
1549 ExprResult PerformContextuallyConvertToBool(Expr *From);
1550 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From);
1552 /// Contexts in which a converted constant expression is required.
1554 CCEK_CaseValue, ///< Expression in a case label.
1555 CCEK_Enumerator, ///< Enumerator value with fixed underlying type.
1556 CCEK_TemplateArg ///< Value of a non-type template parameter.
1558 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
1559 llvm::APSInt &Value, CCEKind CCE);
1562 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE,
1563 const PartialDiagnostic &NotIntDiag,
1564 const PartialDiagnostic &IncompleteDiag,
1565 const PartialDiagnostic &ExplicitConvDiag,
1566 const PartialDiagnostic &ExplicitConvNote,
1567 const PartialDiagnostic &AmbigDiag,
1568 const PartialDiagnostic &AmbigNote,
1569 const PartialDiagnostic &ConvDiag,
1570 bool AllowScopedEnumerations);
1571 enum ObjCSubscriptKind {
1576 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
1578 ExprResult PerformObjectMemberConversion(Expr *From,
1579 NestedNameSpecifier *Qualifier,
1580 NamedDecl *FoundDecl,
1583 // Members have to be NamespaceDecl* or TranslationUnitDecl*.
1584 // TODO: make this is a typesafe union.
1585 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet;
1586 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet;
1588 void AddOverloadCandidate(FunctionDecl *Function,
1589 DeclAccessPair FoundDecl,
1590 llvm::ArrayRef<Expr *> Args,
1591 OverloadCandidateSet& CandidateSet,
1592 bool SuppressUserConversions = false,
1593 bool PartialOverloading = false,
1594 bool AllowExplicit = false);
1595 void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
1596 llvm::ArrayRef<Expr *> Args,
1597 OverloadCandidateSet& CandidateSet,
1598 bool SuppressUserConversions = false,
1599 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
1600 void AddMethodCandidate(DeclAccessPair FoundDecl,
1601 QualType ObjectType,
1602 Expr::Classification ObjectClassification,
1603 Expr **Args, unsigned NumArgs,
1604 OverloadCandidateSet& CandidateSet,
1605 bool SuppressUserConversion = false);
1606 void AddMethodCandidate(CXXMethodDecl *Method,
1607 DeclAccessPair FoundDecl,
1608 CXXRecordDecl *ActingContext, QualType ObjectType,
1609 Expr::Classification ObjectClassification,
1610 llvm::ArrayRef<Expr *> Args,
1611 OverloadCandidateSet& CandidateSet,
1612 bool SuppressUserConversions = false);
1613 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
1614 DeclAccessPair FoundDecl,
1615 CXXRecordDecl *ActingContext,
1616 TemplateArgumentListInfo *ExplicitTemplateArgs,
1617 QualType ObjectType,
1618 Expr::Classification ObjectClassification,
1619 llvm::ArrayRef<Expr *> Args,
1620 OverloadCandidateSet& CandidateSet,
1621 bool SuppressUserConversions = false);
1622 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
1623 DeclAccessPair FoundDecl,
1624 TemplateArgumentListInfo *ExplicitTemplateArgs,
1625 llvm::ArrayRef<Expr *> Args,
1626 OverloadCandidateSet& CandidateSet,
1627 bool SuppressUserConversions = false);
1628 void AddConversionCandidate(CXXConversionDecl *Conversion,
1629 DeclAccessPair FoundDecl,
1630 CXXRecordDecl *ActingContext,
1631 Expr *From, QualType ToType,
1632 OverloadCandidateSet& CandidateSet);
1633 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
1634 DeclAccessPair FoundDecl,
1635 CXXRecordDecl *ActingContext,
1636 Expr *From, QualType ToType,
1637 OverloadCandidateSet &CandidateSet);
1638 void AddSurrogateCandidate(CXXConversionDecl *Conversion,
1639 DeclAccessPair FoundDecl,
1640 CXXRecordDecl *ActingContext,
1641 const FunctionProtoType *Proto,
1642 Expr *Object, llvm::ArrayRef<Expr*> Args,
1643 OverloadCandidateSet& CandidateSet);
1644 void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
1645 SourceLocation OpLoc,
1646 Expr **Args, unsigned NumArgs,
1647 OverloadCandidateSet& CandidateSet,
1648 SourceRange OpRange = SourceRange());
1649 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys,
1650 Expr **Args, unsigned NumArgs,
1651 OverloadCandidateSet& CandidateSet,
1652 bool IsAssignmentOperator = false,
1653 unsigned NumContextualBoolArguments = 0);
1654 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
1655 SourceLocation OpLoc,
1656 Expr **Args, unsigned NumArgs,
1657 OverloadCandidateSet& CandidateSet);
1658 void AddArgumentDependentLookupCandidates(DeclarationName Name,
1659 bool Operator, SourceLocation Loc,
1660 llvm::ArrayRef<Expr *> Args,
1661 TemplateArgumentListInfo *ExplicitTemplateArgs,
1662 OverloadCandidateSet& CandidateSet,
1663 bool PartialOverloading = false,
1664 bool StdNamespaceIsAssociated = false);
1666 // Emit as a 'note' the specific overload candidate
1667 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType());
1669 // Emit as a series of 'note's all template and non-templates
1670 // identified by the expression Expr
1671 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType());
1673 // [PossiblyAFunctionType] --> [Return]
1674 // NonFunctionType --> NonFunctionType
1676 // R (*)(A) --> R (A)
1677 // R (&)(A) --> R (A)
1678 // R (S::*)(A) --> R (A)
1679 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType);
1682 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
1683 QualType TargetType,
1685 DeclAccessPair &Found,
1686 bool *pHadMultipleCandidates = 0);
1688 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
1689 bool Complain = false,
1690 DeclAccessPair* Found = 0);
1692 bool ResolveAndFixSingleFunctionTemplateSpecialization(
1693 ExprResult &SrcExpr,
1694 bool DoFunctionPointerConverion = false,
1695 bool Complain = false,
1696 const SourceRange& OpRangeForComplaining = SourceRange(),
1697 QualType DestTypeForComplaining = QualType(),
1698 unsigned DiagIDForComplaining = 0);
1701 Expr *FixOverloadedFunctionReference(Expr *E,
1702 DeclAccessPair FoundDecl,
1704 ExprResult FixOverloadedFunctionReference(ExprResult,
1705 DeclAccessPair FoundDecl,
1708 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
1709 llvm::ArrayRef<Expr *> Args,
1710 OverloadCandidateSet &CandidateSet,
1711 bool PartialOverloading = false);
1713 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn,
1714 UnresolvedLookupExpr *ULE,
1715 SourceLocation LParenLoc,
1716 Expr **Args, unsigned NumArgs,
1717 SourceLocation RParenLoc,
1719 bool AllowTypoCorrection=true);
1721 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc,
1723 const UnresolvedSetImpl &Fns,
1726 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc,
1728 const UnresolvedSetImpl &Fns,
1729 Expr *LHS, Expr *RHS);
1731 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
1732 SourceLocation RLoc,
1733 Expr *Base,Expr *Idx);
1736 BuildCallToMemberFunction(Scope *S, Expr *MemExpr,
1737 SourceLocation LParenLoc, Expr **Args,
1738 unsigned NumArgs, SourceLocation RParenLoc);
1740 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc,
1741 Expr **Args, unsigned NumArgs,
1742 SourceLocation RParenLoc);
1744 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base,
1745 SourceLocation OpLoc);
1747 /// CheckCallReturnType - Checks that a call expression's return type is
1748 /// complete. Returns true on failure. The location passed in is the location
1749 /// that best represents the call.
1750 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
1751 CallExpr *CE, FunctionDecl *FD);
1753 /// Helpers for dealing with blocks and functions.
1754 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd,
1755 bool CheckParameterNames);
1756 void CheckCXXDefaultArguments(FunctionDecl *FD);
1757 void CheckExtraCXXDefaultArguments(Declarator &D);
1758 Scope *getNonFieldDeclScope(Scope *S);
1760 /// \name Name lookup
1762 /// These routines provide name lookup that is used during semantic
1763 /// analysis to resolve the various kinds of names (identifiers,
1764 /// overloaded operator names, constructor names, etc.) into zero or
1765 /// more declarations within a particular scope. The major entry
1766 /// points are LookupName, which performs unqualified name lookup,
1767 /// and LookupQualifiedName, which performs qualified name lookup.
1769 /// All name lookup is performed based on some specific criteria,
1770 /// which specify what names will be visible to name lookup and how
1771 /// far name lookup should work. These criteria are important both
1772 /// for capturing language semantics (certain lookups will ignore
1773 /// certain names, for example) and for performance, since name
1774 /// lookup is often a bottleneck in the compilation of C++. Name
1775 /// lookup criteria is specified via the LookupCriteria enumeration.
1777 /// The results of name lookup can vary based on the kind of name
1778 /// lookup performed, the current language, and the translation
1779 /// unit. In C, for example, name lookup will either return nothing
1780 /// (no entity found) or a single declaration. In C++, name lookup
1781 /// can additionally refer to a set of overloaded functions or
1782 /// result in an ambiguity. All of the possible results of name
1783 /// lookup are captured by the LookupResult class, which provides
1784 /// the ability to distinguish among them.
1787 /// @brief Describes the kind of name lookup to perform.
1788 enum LookupNameKind {
1789 /// Ordinary name lookup, which finds ordinary names (functions,
1790 /// variables, typedefs, etc.) in C and most kinds of names
1791 /// (functions, variables, members, types, etc.) in C++.
1792 LookupOrdinaryName = 0,
1793 /// Tag name lookup, which finds the names of enums, classes,
1794 /// structs, and unions.
1796 /// Label name lookup.
1798 /// Member name lookup, which finds the names of
1799 /// class/struct/union members.
1801 /// Look up of an operator name (e.g., operator+) for use with
1802 /// operator overloading. This lookup is similar to ordinary name
1803 /// lookup, but will ignore any declarations that are class members.
1805 /// Look up of a name that precedes the '::' scope resolution
1806 /// operator in C++. This lookup completely ignores operator, object,
1807 /// function, and enumerator names (C++ [basic.lookup.qual]p1).
1808 LookupNestedNameSpecifierName,
1809 /// Look up a namespace name within a C++ using directive or
1810 /// namespace alias definition, ignoring non-namespace names (C++
1811 /// [basic.lookup.udir]p1).
1812 LookupNamespaceName,
1813 /// Look up all declarations in a scope with the given name,
1814 /// including resolved using declarations. This is appropriate
1815 /// for checking redeclarations for a using declaration.
1816 LookupUsingDeclName,
1817 /// Look up an ordinary name that is going to be redeclared as a
1818 /// name with linkage. This lookup ignores any declarations that
1819 /// are outside of the current scope unless they have linkage. See
1820 /// C99 6.2.2p4-5 and C++ [basic.link]p6.
1821 LookupRedeclarationWithLinkage,
1822 /// Look up the name of an Objective-C protocol.
1823 LookupObjCProtocolName,
1824 /// Look up implicit 'self' parameter of an objective-c method.
1825 LookupObjCImplicitSelfParam,
1826 /// \brief Look up any declaration with any name.
1830 /// \brief Specifies whether (or how) name lookup is being performed for a
1831 /// redeclaration (vs. a reference).
1832 enum RedeclarationKind {
1833 /// \brief The lookup is a reference to this name that is not for the
1834 /// purpose of redeclaring the name.
1835 NotForRedeclaration = 0,
1836 /// \brief The lookup results will be used for redeclaration of a name,
1837 /// if an entity by that name already exists.
1841 /// \brief The possible outcomes of name lookup for a literal operator.
1842 enum LiteralOperatorLookupResult {
1843 /// \brief The lookup resulted in an error.
1845 /// \brief The lookup found a single 'cooked' literal operator, which
1846 /// expects a normal literal to be built and passed to it.
1848 /// \brief The lookup found a single 'raw' literal operator, which expects
1849 /// a string literal containing the spelling of the literal token.
1851 /// \brief The lookup found an overload set of literal operator templates,
1852 /// which expect the characters of the spelling of the literal token to be
1853 /// passed as a non-type template argument pack.
1857 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D,
1858 CXXSpecialMember SM,
1866 bool CppLookupName(LookupResult &R, Scope *S);
1868 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls.
1870 // The boolean value will be true to indicate that the namespace was loaded
1871 // from an AST/PCH file, or false otherwise.
1872 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces;
1874 /// \brief Whether we have already loaded known namespaces from an extenal
1876 bool LoadedExternalKnownNamespaces;
1879 /// \brief Look up a name, looking for a single declaration. Return
1880 /// null if the results were absent, ambiguous, or overloaded.
1882 /// It is preferable to use the elaborated form and explicitly handle
1883 /// ambiguity and overloaded.
1884 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
1886 LookupNameKind NameKind,
1887 RedeclarationKind Redecl
1888 = NotForRedeclaration);
1889 bool LookupName(LookupResult &R, Scope *S,
1890 bool AllowBuiltinCreation = false);
1891 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
1892 bool InUnqualifiedLookup = false);
1893 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
1894 bool AllowBuiltinCreation = false,
1895 bool EnteringContext = false);
1896 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc,
1897 RedeclarationKind Redecl
1898 = NotForRedeclaration);
1900 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S,
1901 QualType T1, QualType T2,
1902 UnresolvedSetImpl &Functions);
1904 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc,
1905 SourceLocation GnuLabelLoc = SourceLocation());
1907 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class);
1908 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class);
1909 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class,
1911 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals,
1912 bool RValueThis, unsigned ThisQuals);
1913 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class);
1914 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis,
1915 unsigned ThisQuals);
1916 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class);
1918 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R,
1919 ArrayRef<QualType> ArgTys,
1920 bool AllowRawAndTemplate);
1922 void ArgumentDependentLookup(DeclarationName Name, bool Operator,
1924 llvm::ArrayRef<Expr *> Args,
1925 ADLResult &Functions,
1926 bool StdNamespaceIsAssociated = false);
1928 void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
1929 VisibleDeclConsumer &Consumer,
1930 bool IncludeGlobalScope = true);
1931 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind,
1932 VisibleDeclConsumer &Consumer,
1933 bool IncludeGlobalScope = true);
1935 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
1936 Sema::LookupNameKind LookupKind,
1937 Scope *S, CXXScopeSpec *SS,
1938 CorrectionCandidateCallback &CCC,
1939 DeclContext *MemberContext = 0,
1940 bool EnteringContext = false,
1941 const ObjCObjectPointerType *OPT = 0);
1943 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args,
1944 AssociatedNamespaceSet &AssociatedNamespaces,
1945 AssociatedClassSet &AssociatedClasses);
1947 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,
1948 bool ConsiderLinkage,
1949 bool ExplicitInstantiationOrSpecialization);
1951 bool DiagnoseAmbiguousLookup(LookupResult &Result);
1954 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id,
1955 SourceLocation IdLoc,
1956 bool TypoCorrection = false);
1957 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
1958 Scope *S, bool ForRedeclaration,
1959 SourceLocation Loc);
1960 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
1962 void AddKnownFunctionAttributes(FunctionDecl *FD);
1964 // More parsing and symbol table subroutines.
1966 // Decl attributes - this routine is the top level dispatcher.
1967 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD,
1968 bool NonInheritable = true, bool Inheritable = true);
1969 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
1970 bool NonInheritable = true, bool Inheritable = true);
1971 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
1972 const AttributeList *AttrList);
1974 void checkUnusedDeclAttributes(Declarator &D);
1976 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
1977 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC);
1978 bool CheckNoReturnAttr(const AttributeList &attr);
1980 /// \brief Stmt attributes - this routine is the top level dispatcher.
1981 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
1984 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
1985 bool &IncompleteImpl, unsigned DiagID);
1986 void WarnConflictingTypedMethods(ObjCMethodDecl *Method,
1987 ObjCMethodDecl *MethodDecl,
1988 bool IsProtocolMethodDecl);
1990 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method,
1991 ObjCMethodDecl *Overridden,
1992 bool IsProtocolMethodDecl);
1994 /// WarnExactTypedMethods - This routine issues a warning if method
1995 /// implementation declaration matches exactly that of its declaration.
1996 void WarnExactTypedMethods(ObjCMethodDecl *Method,
1997 ObjCMethodDecl *MethodDecl,
1998 bool IsProtocolMethodDecl);
2000 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl,
2001 ObjCInterfaceDecl *IDecl);
2003 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet;
2004 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap;
2006 /// CheckProtocolMethodDefs - This routine checks unimplemented
2007 /// methods declared in protocol, and those referenced by it.
2008 /// \param IDecl - Used for checking for methods which may have been
2010 void CheckProtocolMethodDefs(SourceLocation ImpLoc,
2011 ObjCProtocolDecl *PDecl,
2012 bool& IncompleteImpl,
2013 const SelectorSet &InsMap,
2014 const SelectorSet &ClsMap,
2015 ObjCContainerDecl *CDecl);
2017 /// CheckImplementationIvars - This routine checks if the instance variables
2018 /// listed in the implelementation match those listed in the interface.
2019 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
2020 ObjCIvarDecl **Fields, unsigned nIvars,
2021 SourceLocation Loc);
2023 /// ImplMethodsVsClassMethods - This is main routine to warn if any method
2024 /// remains unimplemented in the class or category @implementation.
2025 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl,
2026 ObjCContainerDecl* IDecl,
2027 bool IncompleteImpl = false);
2029 /// DiagnoseUnimplementedProperties - This routine warns on those properties
2030 /// which must be implemented by this implementation.
2031 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
2032 ObjCContainerDecl *CDecl,
2033 const SelectorSet &InsMap);
2035 /// DefaultSynthesizeProperties - This routine default synthesizes all
2036 /// properties which must be synthesized in class's @implementation.
2037 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl,
2038 ObjCInterfaceDecl *IDecl);
2039 void DefaultSynthesizeProperties(Scope *S, Decl *D);
2041 /// CollectImmediateProperties - This routine collects all properties in
2042 /// the class and its conforming protocols; but not those it its super class.
2043 void CollectImmediateProperties(ObjCContainerDecl *CDecl,
2044 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap,
2045 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap);
2048 /// LookupPropertyDecl - Looks up a property in the current class and all
2050 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl,
2051 IdentifierInfo *II);
2053 /// Called by ActOnProperty to handle @property declarations in
2054 //// class extensions.
2055 Decl *HandlePropertyInClassExtension(Scope *S,
2056 SourceLocation AtLoc,
2057 SourceLocation LParenLoc,
2058 FieldDeclarator &FD,
2061 const bool isAssign,
2062 const bool isReadWrite,
2063 const unsigned Attributes,
2064 const unsigned AttributesAsWritten,
2065 bool *isOverridingProperty,
2067 tok::ObjCKeywordKind MethodImplKind);
2069 /// Called by ActOnProperty and HandlePropertyInClassExtension to
2070 /// handle creating the ObjcPropertyDecl for a category or @interface.
2071 ObjCPropertyDecl *CreatePropertyDecl(Scope *S,
2072 ObjCContainerDecl *CDecl,
2073 SourceLocation AtLoc,
2074 SourceLocation LParenLoc,
2075 FieldDeclarator &FD,
2078 const bool isAssign,
2079 const bool isReadWrite,
2080 const unsigned Attributes,
2081 const unsigned AttributesAsWritten,
2083 tok::ObjCKeywordKind MethodImplKind,
2084 DeclContext *lexicalDC = 0);
2086 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via
2087 /// warning) when atomic property has one but not the other user-declared
2088 /// setter or getter.
2089 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl,
2090 ObjCContainerDecl* IDecl);
2092 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D);
2094 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID);
2096 enum MethodMatchStrategy {
2101 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
2102 /// true, or false, accordingly.
2103 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
2104 const ObjCMethodDecl *PrevMethod,
2105 MethodMatchStrategy strategy = MMS_strict);
2107 /// MatchAllMethodDeclarations - Check methods declaraed in interface or
2108 /// or protocol against those declared in their implementations.
2109 void MatchAllMethodDeclarations(const SelectorSet &InsMap,
2110 const SelectorSet &ClsMap,
2111 SelectorSet &InsMapSeen,
2112 SelectorSet &ClsMapSeen,
2113 ObjCImplDecl* IMPDecl,
2114 ObjCContainerDecl* IDecl,
2115 bool &IncompleteImpl,
2116 bool ImmediateClass,
2117 bool WarnCategoryMethodImpl=false);
2119 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in
2120 /// category matches with those implemented in its primary class and
2121 /// warns each time an exact match is found.
2122 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP);
2124 /// \brief Add the given method to the list of globally-known methods.
2125 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method);
2128 /// AddMethodToGlobalPool - Add an instance or factory method to the global
2129 /// pool. See descriptoin of AddInstanceMethodToGlobalPool.
2130 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance);
2132 /// LookupMethodInGlobalPool - Returns the instance or factory method and
2133 /// optionally warns if there are multiple signatures.
2134 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R,
2135 bool receiverIdOrClass,
2136 bool warn, bool instance);
2139 /// AddInstanceMethodToGlobalPool - All instance methods in a translation
2140 /// unit are added to a global pool. This allows us to efficiently associate
2141 /// a selector with a method declaraation for purposes of typechecking
2142 /// messages sent to "id" (where the class of the object is unknown).
2143 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2144 AddMethodToGlobalPool(Method, impl, /*instance*/true);
2147 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
2148 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2149 AddMethodToGlobalPool(Method, impl, /*instance*/false);
2152 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global
2154 void AddAnyMethodToGlobalPool(Decl *D);
2156 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
2157 /// there are multiple signatures.
2158 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R,
2159 bool receiverIdOrClass=false,
2161 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2162 warn, /*instance*/true);
2165 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if
2166 /// there are multiple signatures.
2167 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R,
2168 bool receiverIdOrClass=false,
2170 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2171 warn, /*instance*/false);
2174 /// LookupImplementedMethodInGlobalPool - Returns the method which has an
2176 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel);
2178 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require
2180 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI,
2181 SmallVectorImpl<ObjCIvarDecl*> &Ivars);
2183 //===--------------------------------------------------------------------===//
2184 // Statement Parsing Callbacks: SemaStmt.cpp.
2188 FullExprArg(Sema &actions) : E(0) { }
2190 // FIXME: The const_cast here is ugly. RValue references would make this
2191 // much nicer (or we could duplicate a bunch of the move semantics
2192 // emulation code from Ownership.h).
2193 FullExprArg(const FullExprArg& Other) : E(Other.E) {}
2195 ExprResult release() {
2199 Expr *get() const { return E; }
2201 Expr *operator->() {
2206 // FIXME: No need to make the entire Sema class a friend when it's just
2207 // Sema::MakeFullExpr that needs access to the constructor below.
2210 explicit FullExprArg(Expr *expr) : E(expr) {}
2215 FullExprArg MakeFullExpr(Expr *Arg) {
2216 return FullExprArg(ActOnFinishFullExpr(Arg).release());
2219 StmtResult ActOnExprStmt(FullExprArg Expr);
2221 StmtResult ActOnNullStmt(SourceLocation SemiLoc,
2222 bool HasLeadingEmptyMacro = false);
2224 void ActOnStartOfCompoundStmt();
2225 void ActOnFinishOfCompoundStmt();
2226 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
2230 /// \brief A RAII object to enter scope of a compound statement.
2231 class CompoundScopeRAII {
2233 CompoundScopeRAII(Sema &S): S(S) {
2234 S.ActOnStartOfCompoundStmt();
2237 ~CompoundScopeRAII() {
2238 S.ActOnFinishOfCompoundStmt();
2245 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl,
2246 SourceLocation StartLoc,
2247 SourceLocation EndLoc);
2248 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl);
2249 StmtResult ActOnForEachLValueExpr(Expr *E);
2250 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal,
2251 SourceLocation DotDotDotLoc, Expr *RHSVal,
2252 SourceLocation ColonLoc);
2253 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt);
2255 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
2256 SourceLocation ColonLoc,
2257 Stmt *SubStmt, Scope *CurScope);
2258 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
2259 SourceLocation ColonLoc, Stmt *SubStmt);
2261 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc, const AttrVec &Attrs,
2264 StmtResult ActOnIfStmt(SourceLocation IfLoc,
2265 FullExprArg CondVal, Decl *CondVar,
2267 SourceLocation ElseLoc, Stmt *ElseVal);
2268 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc,
2271 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
2272 Stmt *Switch, Stmt *Body);
2273 StmtResult ActOnWhileStmt(SourceLocation WhileLoc,
2275 Decl *CondVar, Stmt *Body);
2276 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body,
2277 SourceLocation WhileLoc,
2278 SourceLocation CondLParen, Expr *Cond,
2279 SourceLocation CondRParen);
2281 StmtResult ActOnForStmt(SourceLocation ForLoc,
2282 SourceLocation LParenLoc,
2283 Stmt *First, FullExprArg Second,
2286 SourceLocation RParenLoc,
2288 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc,
2290 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
2291 SourceLocation LParenLoc,
2292 Stmt *First, Expr *Second,
2293 SourceLocation RParenLoc, Stmt *Body);
2294 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc,
2295 SourceLocation LParenLoc, Stmt *LoopVar,
2296 SourceLocation ColonLoc, Expr *Collection,
2297 SourceLocation RParenLoc);
2298 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc,
2299 SourceLocation ColonLoc,
2300 Stmt *RangeDecl, Stmt *BeginEndDecl,
2301 Expr *Cond, Expr *Inc,
2303 SourceLocation RParenLoc);
2304 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body);
2306 StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
2307 SourceLocation LabelLoc,
2308 LabelDecl *TheDecl);
2309 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
2310 SourceLocation StarLoc,
2312 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
2313 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope);
2315 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
2316 bool AllowFunctionParameters);
2318 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2319 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2321 StmtResult ActOnAsmStmt(SourceLocation AsmLoc,
2322 bool IsSimple, bool IsVolatile,
2323 unsigned NumOutputs, unsigned NumInputs,
2324 IdentifierInfo **Names,
2325 MultiExprArg Constraints,
2328 MultiExprArg Clobbers,
2329 SourceLocation RParenLoc,
2330 bool MSAsm = false);
2333 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType,
2334 SourceLocation StartLoc,
2335 SourceLocation IdLoc, IdentifierInfo *Id,
2336 bool Invalid = false);
2338 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D);
2340 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen,
2341 Decl *Parm, Stmt *Body);
2343 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body);
2345 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
2346 MultiStmtArg Catch, Stmt *Finally);
2348 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw);
2349 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw,
2351 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc,
2353 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
2357 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body);
2359 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo,
2360 SourceLocation StartLoc,
2361 SourceLocation IdLoc,
2362 IdentifierInfo *Id);
2364 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D);
2366 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc,
2367 Decl *ExDecl, Stmt *HandlerBlock);
2368 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
2369 MultiStmtArg Handlers);
2371 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ?
2372 SourceLocation TryLoc,
2376 StmtResult ActOnSEHExceptBlock(SourceLocation Loc,
2380 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc,
2383 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock);
2385 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const;
2387 /// \brief If it's a file scoped decl that must warn if not used, keep track
2389 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D);
2391 /// DiagnoseUnusedExprResult - If the statement passed in is an expression
2392 /// whose result is unused, warn.
2393 void DiagnoseUnusedExprResult(const Stmt *S);
2394 void DiagnoseUnusedDecl(const NamedDecl *ND);
2396 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null
2397 /// statement as a \p Body, and it is located on the same line.
2399 /// This helps prevent bugs due to typos, such as:
2402 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
2406 /// Warn if a for/while loop statement \p S, which is followed by
2407 /// \p PossibleBody, has a suspicious null statement as a body.
2408 void DiagnoseEmptyLoopBody(const Stmt *S,
2409 const Stmt *PossibleBody);
2411 ParsingDeclState PushParsingDeclaration() {
2412 return DelayedDiagnostics.pushParsingDecl();
2414 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) {
2415 DelayedDiagnostics::popParsingDecl(*this, state, decl);
2418 typedef ProcessingContextState ParsingClassState;
2419 ParsingClassState PushParsingClass() {
2420 return DelayedDiagnostics.pushContext();
2422 void PopParsingClass(ParsingClassState state) {
2423 DelayedDiagnostics.popContext(state);
2426 void EmitDeprecationWarning(NamedDecl *D, StringRef Message,
2428 const ObjCInterfaceDecl *UnknownObjCClass=0);
2430 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
2432 bool makeUnavailableInSystemHeader(SourceLocation loc,
2435 //===--------------------------------------------------------------------===//
2436 // Expression Parsing Callbacks: SemaExpr.cpp.
2438 bool CanUseDecl(NamedDecl *D);
2439 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
2440 const ObjCInterfaceDecl *UnknownObjCClass=0);
2441 void NoteDeletedFunction(FunctionDecl *FD);
2442 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD);
2443 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD,
2444 ObjCMethodDecl *Getter,
2445 SourceLocation Loc);
2446 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
2447 Expr **Args, unsigned NumArgs);
2449 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
2450 Decl *LambdaContextDecl = 0,
2451 bool IsDecltype = false);
2453 void PopExpressionEvaluationContext();
2455 void DiscardCleanupsInEvaluationContext();
2457 ExprResult TranformToPotentiallyEvaluated(Expr *E);
2458 ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
2460 ExprResult ActOnConstantExpression(ExprResult Res);
2462 // Functions for marking a declaration referenced. These functions also
2463 // contain the relevant logic for marking if a reference to a function or
2464 // variable is an odr-use (in the C++11 sense). There are separate variants
2465 // for expressions referring to a decl; these exist because odr-use marking
2466 // needs to be delayed for some constant variables when we build one of the
2467 // named expressions.
2468 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D);
2469 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func);
2470 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
2471 void MarkDeclRefReferenced(DeclRefExpr *E);
2472 void MarkMemberReferenced(MemberExpr *E);
2474 void UpdateMarkingForLValueToRValue(Expr *E);
2475 void CleanupVarDeclMarking();
2477 enum TryCaptureKind {
2478 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef
2481 /// \brief Try to capture the given variable.
2483 /// \param Var The variable to capture.
2485 /// \param Loc The location at which the capture occurs.
2487 /// \param Kind The kind of capture, which may be implicit (for either a
2488 /// block or a lambda), or explicit by-value or by-reference (for a lambda).
2490 /// \param EllipsisLoc The location of the ellipsis, if one is provided in
2491 /// an explicit lambda capture.
2493 /// \param BuildAndDiagnose Whether we are actually supposed to add the
2494 /// captures or diagnose errors. If false, this routine merely check whether
2495 /// the capture can occur without performing the capture itself or complaining
2496 /// if the variable cannot be captured.
2498 /// \param CaptureType Will be set to the type of the field used to capture
2499 /// this variable in the innermost block or lambda. Only valid when the
2500 /// variable can be captured.
2502 /// \param DeclRefType Will be set to the type of a refernce to the capture
2503 /// from within the current scope. Only valid when the variable can be
2506 /// \returns true if an error occurred (i.e., the variable cannot be
2507 /// captured) and false if the capture succeeded.
2508 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind,
2509 SourceLocation EllipsisLoc, bool BuildAndDiagnose,
2510 QualType &CaptureType,
2511 QualType &DeclRefType);
2513 /// \brief Try to capture the given variable.
2514 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
2515 TryCaptureKind Kind = TryCapture_Implicit,
2516 SourceLocation EllipsisLoc = SourceLocation());
2518 /// \brief Given a variable, determine the type that a reference to that
2519 /// variable will have in the given scope.
2520 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc);
2522 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T);
2523 void MarkDeclarationsReferencedInExpr(Expr *E,
2524 bool SkipLocalVariables = false);
2526 /// \brief Try to recover by turning the given expression into a
2527 /// call. Returns true if recovery was attempted or an error was
2528 /// emitted; this may also leave the ExprResult invalid.
2529 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
2530 bool ForceComplain = false,
2531 bool (*IsPlausibleResult)(QualType) = 0);
2533 /// \brief Figure out if an expression could be turned into a call.
2534 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy,
2535 UnresolvedSetImpl &NonTemplateOverloads);
2537 /// \brief Conditionally issue a diagnostic based on the current
2538 /// evaluation context.
2540 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until
2541 /// the function body is parsed, and then do a basic reachability analysis to
2542 /// determine if the statement is reachable. If it is unreachable, the
2543 /// diagnostic will not be emitted.
2544 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
2545 const PartialDiagnostic &PD);
2547 // Primary Expressions.
2548 SourceRange getExprRange(Expr *E) const;
2550 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
2551 SourceLocation TemplateKWLoc,
2553 bool HasTrailingLParen, bool IsAddressOfOperand,
2554 CorrectionCandidateCallback *CCC = 0);
2556 void DecomposeUnqualifiedId(const UnqualifiedId &Id,
2557 TemplateArgumentListInfo &Buffer,
2558 DeclarationNameInfo &NameInfo,
2559 const TemplateArgumentListInfo *&TemplateArgs);
2561 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
2562 CorrectionCandidateCallback &CCC,
2563 TemplateArgumentListInfo *ExplicitTemplateArgs = 0,
2564 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>());
2566 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
2568 bool AllowBuiltinCreation=false);
2570 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS,
2571 SourceLocation TemplateKWLoc,
2572 const DeclarationNameInfo &NameInfo,
2573 bool isAddressOfOperand,
2574 const TemplateArgumentListInfo *TemplateArgs);
2576 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2579 const CXXScopeSpec *SS = 0);
2580 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2582 const DeclarationNameInfo &NameInfo,
2583 const CXXScopeSpec *SS = 0);
2585 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS,
2586 SourceLocation nameLoc,
2587 IndirectFieldDecl *indirectField,
2588 Expr *baseObjectExpr = 0,
2589 SourceLocation opLoc = SourceLocation());
2590 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS,
2591 SourceLocation TemplateKWLoc,
2593 const TemplateArgumentListInfo *TemplateArgs);
2594 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS,
2595 SourceLocation TemplateKWLoc,
2597 const TemplateArgumentListInfo *TemplateArgs,
2598 bool IsDefiniteInstance);
2599 bool UseArgumentDependentLookup(const CXXScopeSpec &SS,
2600 const LookupResult &R,
2601 bool HasTrailingLParen);
2603 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
2604 const DeclarationNameInfo &NameInfo);
2605 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS,
2606 SourceLocation TemplateKWLoc,
2607 const DeclarationNameInfo &NameInfo,
2608 const TemplateArgumentListInfo *TemplateArgs);
2610 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2613 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2614 const DeclarationNameInfo &NameInfo,
2617 ExprResult BuildLiteralOperatorCall(LookupResult &R,
2618 DeclarationNameInfo &SuffixInfo,
2619 ArrayRef<Expr*> Args,
2620 SourceLocation LitEndLoc,
2621 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
2623 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind);
2624 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val);
2625 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0);
2626 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0);
2627 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E);
2628 ExprResult ActOnParenListExpr(SourceLocation L,
2632 /// ActOnStringLiteral - The specified tokens were lexed as pasted string
2633 /// fragments (e.g. "foo" "bar" L"baz").
2634 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks,
2635 Scope *UDLScope = 0);
2637 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc,
2638 SourceLocation DefaultLoc,
2639 SourceLocation RParenLoc,
2640 Expr *ControllingExpr,
2641 MultiTypeArg ArgTypes,
2642 MultiExprArg ArgExprs);
2643 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc,
2644 SourceLocation DefaultLoc,
2645 SourceLocation RParenLoc,
2646 Expr *ControllingExpr,
2647 TypeSourceInfo **Types,
2649 unsigned NumAssocs);
2651 // Binary/Unary Operators. 'Tok' is the token for the operator.
2652 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
2654 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc,
2655 UnaryOperatorKind Opc, Expr *Input);
2656 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
2657 tok::TokenKind Op, Expr *Input);
2659 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
2660 SourceLocation OpLoc,
2661 UnaryExprOrTypeTrait ExprKind,
2663 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
2664 UnaryExprOrTypeTrait ExprKind);
2666 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
2667 UnaryExprOrTypeTrait ExprKind,
2668 bool IsType, void *TyOrEx,
2669 const SourceRange &ArgRange);
2671 ExprResult CheckPlaceholderExpr(Expr *E);
2672 bool CheckVecStepExpr(Expr *E);
2674 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind);
2675 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc,
2676 SourceRange ExprRange,
2677 UnaryExprOrTypeTrait ExprKind);
2678 ExprResult ActOnSizeofParameterPackExpr(Scope *S,
2679 SourceLocation OpLoc,
2680 IdentifierInfo &Name,
2681 SourceLocation NameLoc,
2682 SourceLocation RParenLoc);
2683 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
2684 tok::TokenKind Kind, Expr *Input);
2686 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
2687 Expr *Idx, SourceLocation RLoc);
2688 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
2689 Expr *Idx, SourceLocation RLoc);
2691 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
2692 SourceLocation OpLoc, bool IsArrow,
2694 SourceLocation TemplateKWLoc,
2695 NamedDecl *FirstQualifierInScope,
2696 const DeclarationNameInfo &NameInfo,
2697 const TemplateArgumentListInfo *TemplateArgs);
2699 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
2700 SourceLocation OpLoc, bool IsArrow,
2701 const CXXScopeSpec &SS,
2702 SourceLocation TemplateKWLoc,
2703 NamedDecl *FirstQualifierInScope,
2705 const TemplateArgumentListInfo *TemplateArgs,
2706 bool SuppressQualifierCheck = false);
2708 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow);
2709 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base,
2710 bool &IsArrow, SourceLocation OpLoc,
2713 bool HasTemplateArgs);
2715 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType,
2716 const CXXScopeSpec &SS,
2717 const LookupResult &R);
2719 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType,
2720 bool IsArrow, SourceLocation OpLoc,
2721 const CXXScopeSpec &SS,
2722 SourceLocation TemplateKWLoc,
2723 NamedDecl *FirstQualifierInScope,
2724 const DeclarationNameInfo &NameInfo,
2725 const TemplateArgumentListInfo *TemplateArgs);
2727 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base,
2728 SourceLocation OpLoc,
2729 tok::TokenKind OpKind,
2731 SourceLocation TemplateKWLoc,
2732 UnqualifiedId &Member,
2734 bool HasTrailingLParen);
2736 void ActOnDefaultCtorInitializers(Decl *CDtorDecl);
2737 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
2738 FunctionDecl *FDecl,
2739 const FunctionProtoType *Proto,
2740 Expr **Args, unsigned NumArgs,
2741 SourceLocation RParenLoc,
2742 bool ExecConfig = false);
2743 void CheckStaticArrayArgument(SourceLocation CallLoc,
2745 const Expr *ArgExpr);
2747 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
2748 /// This provides the location of the left/right parens and a list of comma
2750 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
2751 MultiExprArg ArgExprs, SourceLocation RParenLoc,
2752 Expr *ExecConfig = 0, bool IsExecConfig = false);
2753 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
2754 SourceLocation LParenLoc,
2755 Expr **Args, unsigned NumArgs,
2756 SourceLocation RParenLoc,
2758 bool IsExecConfig = false);
2760 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
2761 MultiExprArg ExecConfig,
2762 SourceLocation GGGLoc);
2764 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
2765 Declarator &D, ParsedType &Ty,
2766 SourceLocation RParenLoc, Expr *CastExpr);
2767 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc,
2769 SourceLocation RParenLoc,
2771 CastKind PrepareScalarCast(ExprResult &src, QualType destType);
2773 /// \brief Build an altivec or OpenCL literal.
2774 ExprResult BuildVectorLiteral(SourceLocation LParenLoc,
2775 SourceLocation RParenLoc, Expr *E,
2776 TypeSourceInfo *TInfo);
2778 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME);
2780 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc,
2782 SourceLocation RParenLoc,
2785 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc,
2786 TypeSourceInfo *TInfo,
2787 SourceLocation RParenLoc,
2790 ExprResult ActOnInitList(SourceLocation LBraceLoc,
2791 MultiExprArg InitArgList,
2792 SourceLocation RBraceLoc);
2794 ExprResult ActOnDesignatedInitializer(Designation &Desig,
2799 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc,
2800 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr);
2801 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc,
2802 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr);
2803 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc,
2804 Expr *LHSExpr, Expr *RHSExpr);
2806 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
2807 /// in the case of a the GNU conditional expr extension.
2808 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
2809 SourceLocation ColonLoc,
2810 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr);
2812 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
2813 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
2814 LabelDecl *TheDecl);
2816 void ActOnStartStmtExpr();
2817 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
2818 SourceLocation RPLoc); // "({..})"
2819 void ActOnStmtExprError();
2821 // __builtin_offsetof(type, identifier(.identifier|[expr])*)
2822 struct OffsetOfComponent {
2823 SourceLocation LocStart, LocEnd;
2824 bool isBrackets; // true if [expr], false if .ident
2826 IdentifierInfo *IdentInfo;
2831 /// __builtin_offsetof(type, a.b[123][456].c)
2832 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
2833 TypeSourceInfo *TInfo,
2834 OffsetOfComponent *CompPtr,
2835 unsigned NumComponents,
2836 SourceLocation RParenLoc);
2837 ExprResult ActOnBuiltinOffsetOf(Scope *S,
2838 SourceLocation BuiltinLoc,
2839 SourceLocation TypeLoc,
2840 ParsedType ParsedArgTy,
2841 OffsetOfComponent *CompPtr,
2842 unsigned NumComponents,
2843 SourceLocation RParenLoc);
2845 // __builtin_choose_expr(constExpr, expr1, expr2)
2846 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
2847 Expr *CondExpr, Expr *LHSExpr,
2848 Expr *RHSExpr, SourceLocation RPLoc);
2850 // __builtin_va_arg(expr, type)
2851 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty,
2852 SourceLocation RPLoc);
2853 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E,
2854 TypeSourceInfo *TInfo, SourceLocation RPLoc);
2857 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc);
2859 bool CheckCaseExpression(Expr *E);
2861 /// \brief Describes the result of an "if-exists" condition check.
2862 enum IfExistsResult {
2863 /// \brief The symbol exists.
2866 /// \brief The symbol does not exist.
2869 /// \brief The name is a dependent name, so the results will differ
2870 /// from one instantiation to the next.
2873 /// \brief An error occurred.
2878 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS,
2879 const DeclarationNameInfo &TargetNameInfo);
2882 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc,
2883 bool IsIfExists, CXXScopeSpec &SS,
2884 UnqualifiedId &Name);
2886 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc,
2888 NestedNameSpecifierLoc QualifierLoc,
2889 DeclarationNameInfo NameInfo,
2891 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc,
2893 CXXScopeSpec &SS, UnqualifiedId &Name,
2896 //===------------------------- "Block" Extension ------------------------===//
2898 /// ActOnBlockStart - This callback is invoked when a block literal is
2900 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope);
2902 /// ActOnBlockArguments - This callback allows processing of block arguments.
2903 /// If there are no arguments, this is still invoked.
2904 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope);
2906 /// ActOnBlockError - If there is an error parsing a block, this callback
2907 /// is invoked to pop the information about the block from the action impl.
2908 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope);
2910 /// ActOnBlockStmtExpr - This is called when the body of a block statement
2911 /// literal was successfully completed. ^(int x){...}
2912 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body,
2915 //===---------------------------- OpenCL Features -----------------------===//
2917 /// __builtin_astype(...)
2918 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
2919 SourceLocation BuiltinLoc,
2920 SourceLocation RParenLoc);
2922 //===---------------------------- C++ Features --------------------------===//
2924 // Act on C++ namespaces
2925 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc,
2926 SourceLocation NamespaceLoc,
2927 SourceLocation IdentLoc,
2928 IdentifierInfo *Ident,
2929 SourceLocation LBrace,
2930 AttributeList *AttrList);
2931 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace);
2933 NamespaceDecl *getStdNamespace() const;
2934 NamespaceDecl *getOrCreateStdNamespace();
2936 CXXRecordDecl *getStdBadAlloc() const;
2938 /// \brief Tests whether Ty is an instance of std::initializer_list and, if
2939 /// it is and Element is not NULL, assigns the element type to Element.
2940 bool isStdInitializerList(QualType Ty, QualType *Element);
2942 /// \brief Looks for the std::initializer_list template and instantiates it
2943 /// with Element, or emits an error if it's not found.
2945 /// \returns The instantiated template, or null on error.
2946 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc);
2948 /// \brief Determine whether Ctor is an initializer-list constructor, as
2949 /// defined in [dcl.init.list]p2.
2950 bool isInitListConstructor(const CXXConstructorDecl *Ctor);
2952 Decl *ActOnUsingDirective(Scope *CurScope,
2953 SourceLocation UsingLoc,
2954 SourceLocation NamespcLoc,
2956 SourceLocation IdentLoc,
2957 IdentifierInfo *NamespcName,
2958 AttributeList *AttrList);
2960 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir);
2962 Decl *ActOnNamespaceAliasDef(Scope *CurScope,
2963 SourceLocation NamespaceLoc,
2964 SourceLocation AliasLoc,
2965 IdentifierInfo *Alias,
2967 SourceLocation IdentLoc,
2968 IdentifierInfo *Ident);
2970 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow);
2971 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target,
2972 const LookupResult &PreviousDecls);
2973 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD,
2976 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
2978 const CXXScopeSpec &SS,
2979 SourceLocation NameLoc,
2980 const LookupResult &Previous);
2981 bool CheckUsingDeclQualifier(SourceLocation UsingLoc,
2982 const CXXScopeSpec &SS,
2983 SourceLocation NameLoc);
2985 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
2986 SourceLocation UsingLoc,
2988 const DeclarationNameInfo &NameInfo,
2989 AttributeList *AttrList,
2990 bool IsInstantiation,
2992 SourceLocation TypenameLoc);
2994 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD);
2996 Decl *ActOnUsingDeclaration(Scope *CurScope,
2998 bool HasUsingKeyword,
2999 SourceLocation UsingLoc,
3001 UnqualifiedId &Name,
3002 AttributeList *AttrList,
3004 SourceLocation TypenameLoc);
3005 Decl *ActOnAliasDeclaration(Scope *CurScope,
3007 MultiTemplateParamsArg TemplateParams,
3008 SourceLocation UsingLoc,
3009 UnqualifiedId &Name,
3012 /// InitializeVarWithConstructor - Creates an CXXConstructExpr
3013 /// and sets it as the initializer for the the passed in VarDecl.
3014 bool InitializeVarWithConstructor(VarDecl *VD,
3015 CXXConstructorDecl *Constructor,
3017 bool HadMultipleCandidates);
3019 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
3020 /// including handling of its default argument expressions.
3022 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind
3024 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3025 CXXConstructorDecl *Constructor, MultiExprArg Exprs,
3026 bool HadMultipleCandidates, bool RequiresZeroInit,
3027 unsigned ConstructKind, SourceRange ParenRange);
3029 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if
3030 // the constructor can be elidable?
3032 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3033 CXXConstructorDecl *Constructor, bool Elidable,
3034 MultiExprArg Exprs, bool HadMultipleCandidates,
3035 bool RequiresZeroInit, unsigned ConstructKind,
3036 SourceRange ParenRange);
3038 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
3039 /// the default expr if needed.
3040 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
3042 ParmVarDecl *Param);
3044 /// FinalizeVarWithDestructor - Prepare for calling destructor on the
3045 /// constructed variable.
3046 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType);
3048 /// \brief Helper class that collects exception specifications for
3049 /// implicitly-declared special member functions.
3050 class ImplicitExceptionSpecification {
3051 // Pointer to allow copying
3053 // We order exception specifications thus:
3054 // noexcept is the most restrictive, but is only used in C++0x.
3055 // throw() comes next.
3056 // Then a throw(collected exceptions)
3057 // Finally no specification.
3058 // throw(...) is used instead if any called function uses it.
3060 // If this exception specification cannot be known yet (for instance,
3061 // because this is the exception specification for a defaulted default
3062 // constructor and we haven't finished parsing the deferred parts of the
3063 // class yet), the C++0x standard does not specify how to behave. We
3064 // record this as an 'unknown' exception specification, which overrules
3065 // any other specification (even 'none', to keep this rule simple).
3066 ExceptionSpecificationType ComputedEST;
3067 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen;
3068 SmallVector<QualType, 4> Exceptions;
3070 void ClearExceptions() {
3071 ExceptionsSeen.clear();
3076 explicit ImplicitExceptionSpecification(Sema &Self)
3077 : Self(&Self), ComputedEST(EST_BasicNoexcept) {
3078 if (!Self.Context.getLangOpts().CPlusPlus0x)
3079 ComputedEST = EST_DynamicNone;
3082 /// \brief Get the computed exception specification type.
3083 ExceptionSpecificationType getExceptionSpecType() const {
3084 assert(ComputedEST != EST_ComputedNoexcept &&
3085 "noexcept(expr) should not be a possible result");
3089 /// \brief The number of exceptions in the exception specification.
3090 unsigned size() const { return Exceptions.size(); }
3092 /// \brief The set of exceptions in the exception specification.
3093 const QualType *data() const { return Exceptions.data(); }
3095 /// \brief Integrate another called method into the collected data.
3096 void CalledDecl(SourceLocation CallLoc, CXXMethodDecl *Method);
3098 /// \brief Integrate an invoked expression into the collected data.
3099 void CalledExpr(Expr *E);
3101 /// \brief Specify that the exception specification can't be detemined yet.
3104 ComputedEST = EST_Delayed;
3107 FunctionProtoType::ExtProtoInfo getEPI() const {
3108 FunctionProtoType::ExtProtoInfo EPI;
3109 EPI.ExceptionSpecType = getExceptionSpecType();
3110 EPI.NumExceptions = size();
3111 EPI.Exceptions = data();
3116 /// \brief Determine what sort of exception specification a defaulted
3117 /// copy constructor of a class will have.
3118 ImplicitExceptionSpecification
3119 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl);
3121 /// \brief Determine what sort of exception specification a defaulted
3122 /// default constructor of a class will have, and whether the parameter
3124 std::pair<ImplicitExceptionSpecification, bool>
3125 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl);
3127 /// \brief Determine what sort of exception specification a defautled
3128 /// copy assignment operator of a class will have, and whether the
3129 /// parameter will be const.
3130 std::pair<ImplicitExceptionSpecification, bool>
3131 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl);
3133 /// \brief Determine what sort of exception specification a defaulted move
3134 /// constructor of a class will have.
3135 ImplicitExceptionSpecification
3136 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl);
3138 /// \brief Determine what sort of exception specification a defaulted move
3139 /// assignment operator of a class will have.
3140 ImplicitExceptionSpecification
3141 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl);
3143 /// \brief Determine what sort of exception specification a defaulted
3144 /// destructor of a class will have.
3145 ImplicitExceptionSpecification
3146 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl);
3148 /// \brief Check the given exception-specification and update the
3149 /// extended prototype information with the results.
3150 void checkExceptionSpecification(ExceptionSpecificationType EST,
3151 ArrayRef<ParsedType> DynamicExceptions,
3152 ArrayRef<SourceRange> DynamicExceptionRanges,
3154 llvm::SmallVectorImpl<QualType> &Exceptions,
3155 FunctionProtoType::ExtProtoInfo &EPI);
3157 /// \brief Determine if a special member function should have a deleted
3158 /// definition when it is defaulted.
3159 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
3160 bool Diagnose = false);
3162 /// \brief Declare the implicit default constructor for the given class.
3164 /// \param ClassDecl The class declaration into which the implicit
3165 /// default constructor will be added.
3167 /// \returns The implicitly-declared default constructor.
3168 CXXConstructorDecl *DeclareImplicitDefaultConstructor(
3169 CXXRecordDecl *ClassDecl);
3171 /// DefineImplicitDefaultConstructor - Checks for feasibility of
3172 /// defining this constructor as the default constructor.
3173 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
3174 CXXConstructorDecl *Constructor);
3176 /// \brief Declare the implicit destructor for the given class.
3178 /// \param ClassDecl The class declaration into which the implicit
3179 /// destructor will be added.
3181 /// \returns The implicitly-declared destructor.
3182 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl);
3184 /// DefineImplicitDestructor - Checks for feasibility of
3185 /// defining this destructor as the default destructor.
3186 void DefineImplicitDestructor(SourceLocation CurrentLocation,
3187 CXXDestructorDecl *Destructor);
3189 /// \brief Build an exception spec for destructors that don't have one.
3191 /// C++11 says that user-defined destructors with no exception spec get one
3192 /// that looks as if the destructor was implicitly declared.
3193 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
3194 CXXDestructorDecl *Destructor,
3195 bool WasDelayed = false);
3197 /// \brief Declare all inherited constructors for the given class.
3199 /// \param ClassDecl The class declaration into which the inherited
3200 /// constructors will be added.
3201 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl);
3203 /// \brief Declare the implicit copy constructor for the given class.
3205 /// \param ClassDecl The class declaration into which the implicit
3206 /// copy constructor will be added.
3208 /// \returns The implicitly-declared copy constructor.
3209 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl);
3211 /// DefineImplicitCopyConstructor - Checks for feasibility of
3212 /// defining this constructor as the copy constructor.
3213 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
3214 CXXConstructorDecl *Constructor);
3216 /// \brief Declare the implicit move constructor for the given class.
3218 /// \param ClassDecl The Class declaration into which the implicit
3219 /// move constructor will be added.
3221 /// \returns The implicitly-declared move constructor, or NULL if it wasn't
3223 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl);
3225 /// DefineImplicitMoveConstructor - Checks for feasibility of
3226 /// defining this constructor as the move constructor.
3227 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
3228 CXXConstructorDecl *Constructor);
3230 /// \brief Declare the implicit copy assignment operator for the given class.
3232 /// \param ClassDecl The class declaration into which the implicit
3233 /// copy assignment operator will be added.
3235 /// \returns The implicitly-declared copy assignment operator.
3236 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl);
3238 /// \brief Defines an implicitly-declared copy assignment operator.
3239 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
3240 CXXMethodDecl *MethodDecl);
3242 /// \brief Declare the implicit move assignment operator for the given class.
3244 /// \param ClassDecl The Class declaration into which the implicit
3245 /// move assignment operator will be added.
3247 /// \returns The implicitly-declared move assignment operator, or NULL if it
3248 /// wasn't declared.
3249 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl);
3251 /// \brief Defines an implicitly-declared move assignment operator.
3252 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
3253 CXXMethodDecl *MethodDecl);
3255 /// \brief Force the declaration of any implicitly-declared members of this
3257 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class);
3259 /// \brief Determine whether the given function is an implicitly-deleted
3260 /// special member function.
3261 bool isImplicitlyDeleted(FunctionDecl *FD);
3263 /// \brief Check whether 'this' shows up in the type of a static member
3264 /// function after the (naturally empty) cv-qualifier-seq would be.
3266 /// \returns true if an error occurred.
3267 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method);
3269 /// \brief Whether this' shows up in the exception specification of a static
3270 /// member function.
3271 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method);
3273 /// \brief Check whether 'this' shows up in the attributes of the given
3274 /// static member function.
3276 /// \returns true if an error occurred.
3277 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method);
3279 /// MaybeBindToTemporary - If the passed in expression has a record type with
3280 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise
3281 /// it simply returns the passed in expression.
3282 ExprResult MaybeBindToTemporary(Expr *E);
3284 bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
3285 MultiExprArg ArgsPtr,
3287 ASTOwningVector<Expr*> &ConvertedArgs,
3288 bool AllowExplicit = false);
3290 ParsedType getDestructorName(SourceLocation TildeLoc,
3291 IdentifierInfo &II, SourceLocation NameLoc,
3292 Scope *S, CXXScopeSpec &SS,
3293 ParsedType ObjectType,
3294 bool EnteringContext);
3296 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType);
3298 // Checks that reinterpret casts don't have undefined behavior.
3299 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType,
3300 bool IsDereference, SourceRange Range);
3302 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
3303 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc,
3304 tok::TokenKind Kind,
3305 SourceLocation LAngleBracketLoc,
3307 SourceLocation RAngleBracketLoc,
3308 SourceLocation LParenLoc,
3310 SourceLocation RParenLoc);
3312 ExprResult BuildCXXNamedCast(SourceLocation OpLoc,
3313 tok::TokenKind Kind,
3316 SourceRange AngleBrackets,
3317 SourceRange Parens);
3319 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3320 SourceLocation TypeidLoc,
3321 TypeSourceInfo *Operand,
3322 SourceLocation RParenLoc);
3323 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3324 SourceLocation TypeidLoc,
3326 SourceLocation RParenLoc);
3328 /// ActOnCXXTypeid - Parse typeid( something ).
3329 ExprResult ActOnCXXTypeid(SourceLocation OpLoc,
3330 SourceLocation LParenLoc, bool isType,
3332 SourceLocation RParenLoc);
3334 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3335 SourceLocation TypeidLoc,
3336 TypeSourceInfo *Operand,
3337 SourceLocation RParenLoc);
3338 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3339 SourceLocation TypeidLoc,
3341 SourceLocation RParenLoc);
3343 /// ActOnCXXUuidof - Parse __uuidof( something ).
3344 ExprResult ActOnCXXUuidof(SourceLocation OpLoc,
3345 SourceLocation LParenLoc, bool isType,
3347 SourceLocation RParenLoc);
3350 //// ActOnCXXThis - Parse 'this' pointer.
3351 ExprResult ActOnCXXThis(SourceLocation loc);
3353 /// \brief Try to retrieve the type of the 'this' pointer.
3355 /// \param Capture If true, capture 'this' in this context.
3357 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type.
3358 QualType getCurrentThisType();
3360 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the
3361 /// current context not being a non-static member function. In such cases,
3362 /// this provides the type used for 'this'.
3363 QualType CXXThisTypeOverride;
3365 /// \brief RAII object used to temporarily allow the C++ 'this' expression
3366 /// to be used, with the given qualifiers on the current class type.
3367 class CXXThisScopeRAII {
3369 QualType OldCXXThisTypeOverride;
3373 /// \brief Introduce a new scope where 'this' may be allowed (when enabled),
3374 /// using the given declaration (which is either a class template or a
3375 /// class) along with the given qualifiers.
3376 /// along with the qualifiers placed on '*this'.
3377 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals,
3378 bool Enabled = true);
3380 ~CXXThisScopeRAII();
3383 /// \brief Make sure the value of 'this' is actually available in the current
3384 /// context, if it is a potentially evaluated context.
3386 /// \param Loc The location at which the capture of 'this' occurs.
3388 /// \param Explicit Whether 'this' is explicitly captured in a lambda
3390 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false);
3392 /// \brief Determine whether the given type is the type of *this that is used
3393 /// outside of the body of a member function for a type that is currently
3395 bool isThisOutsideMemberFunctionBody(QualType BaseType);
3397 /// ActOnCXXBoolLiteral - Parse {true,false} literals.
3398 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3401 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
3402 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3404 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
3405 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc);
3407 //// ActOnCXXThrow - Parse throw expressions.
3408 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr);
3409 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
3410 bool IsThrownVarInScope);
3411 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E,
3412 bool IsThrownVarInScope);
3414 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
3415 /// Can be interpreted either as function-style casting ("int(x)")
3416 /// or class type construction ("ClassType(x,y,z)")
3417 /// or creation of a value-initialized type ("int()").
3418 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep,
3419 SourceLocation LParenLoc,
3421 SourceLocation RParenLoc);
3423 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type,
3424 SourceLocation LParenLoc,
3426 SourceLocation RParenLoc);
3428 /// ActOnCXXNew - Parsed a C++ 'new' expression.
3429 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
3430 SourceLocation PlacementLParen,
3431 MultiExprArg PlacementArgs,
3432 SourceLocation PlacementRParen,
3433 SourceRange TypeIdParens, Declarator &D,
3435 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
3436 SourceLocation PlacementLParen,
3437 MultiExprArg PlacementArgs,
3438 SourceLocation PlacementRParen,
3439 SourceRange TypeIdParens,
3441 TypeSourceInfo *AllocTypeInfo,
3443 SourceRange DirectInitRange,
3445 bool TypeMayContainAuto = true);
3447 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc,
3449 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
3450 bool UseGlobal, QualType AllocType, bool IsArray,
3451 Expr **PlaceArgs, unsigned NumPlaceArgs,
3452 FunctionDecl *&OperatorNew,
3453 FunctionDecl *&OperatorDelete);
3454 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range,
3455 DeclarationName Name, Expr** Args,
3456 unsigned NumArgs, DeclContext *Ctx,
3457 bool AllowMissing, FunctionDecl *&Operator,
3458 bool Diagnose = true);
3459 void DeclareGlobalNewDelete();
3460 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return,
3462 bool addMallocAttr = false);
3464 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
3465 DeclarationName Name, FunctionDecl* &Operator,
3466 bool Diagnose = true);
3468 /// ActOnCXXDelete - Parsed a C++ 'delete' expression
3469 ExprResult ActOnCXXDelete(SourceLocation StartLoc,
3470 bool UseGlobal, bool ArrayForm,
3473 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D);
3474 ExprResult CheckConditionVariable(VarDecl *ConditionVar,
3475 SourceLocation StmtLoc,
3476 bool ConvertToBoolean);
3478 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen,
3479 Expr *Operand, SourceLocation RParen);
3480 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
3481 SourceLocation RParen);
3483 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support
3484 /// pseudo-functions.
3485 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT,
3486 SourceLocation KWLoc,
3488 SourceLocation RParen);
3490 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT,
3491 SourceLocation KWLoc,
3493 SourceLocation RParen);
3495 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support
3496 /// pseudo-functions.
3497 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT,
3498 SourceLocation KWLoc,
3501 SourceLocation RParen);
3503 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT,
3504 SourceLocation KWLoc,
3505 TypeSourceInfo *LhsT,
3506 TypeSourceInfo *RhsT,
3507 SourceLocation RParen);
3509 /// \brief Parsed one of the type trait support pseudo-functions.
3510 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3511 ArrayRef<ParsedType> Args,
3512 SourceLocation RParenLoc);
3513 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3514 ArrayRef<TypeSourceInfo *> Args,
3515 SourceLocation RParenLoc);
3517 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support
3518 /// pseudo-functions.
3519 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT,
3520 SourceLocation KWLoc,
3523 SourceLocation RParen);
3525 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT,
3526 SourceLocation KWLoc,
3527 TypeSourceInfo *TSInfo,
3529 SourceLocation RParen);
3531 /// ActOnExpressionTrait - Parsed one of the unary type trait support
3532 /// pseudo-functions.
3533 ExprResult ActOnExpressionTrait(ExpressionTrait OET,
3534 SourceLocation KWLoc,
3536 SourceLocation RParen);
3538 ExprResult BuildExpressionTrait(ExpressionTrait OET,
3539 SourceLocation KWLoc,
3541 SourceLocation RParen);
3543 ExprResult ActOnStartCXXMemberReference(Scope *S,
3545 SourceLocation OpLoc,
3546 tok::TokenKind OpKind,
3547 ParsedType &ObjectType,
3548 bool &MayBePseudoDestructor);
3550 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr);
3552 ExprResult BuildPseudoDestructorExpr(Expr *Base,
3553 SourceLocation OpLoc,
3554 tok::TokenKind OpKind,
3555 const CXXScopeSpec &SS,
3556 TypeSourceInfo *ScopeType,
3557 SourceLocation CCLoc,
3558 SourceLocation TildeLoc,
3559 PseudoDestructorTypeStorage DestroyedType,
3560 bool HasTrailingLParen);
3562 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3563 SourceLocation OpLoc,
3564 tok::TokenKind OpKind,
3566 UnqualifiedId &FirstTypeName,
3567 SourceLocation CCLoc,
3568 SourceLocation TildeLoc,
3569 UnqualifiedId &SecondTypeName,
3570 bool HasTrailingLParen);
3572 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3573 SourceLocation OpLoc,
3574 tok::TokenKind OpKind,
3575 SourceLocation TildeLoc,
3577 bool HasTrailingLParen);
3579 /// MaybeCreateExprWithCleanups - If the current full-expression
3580 /// requires any cleanups, surround it with a ExprWithCleanups node.
3581 /// Otherwise, just returns the passed-in expression.
3582 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr);
3583 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt);
3584 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr);
3586 ExprResult ActOnFinishFullExpr(Expr *Expr);
3587 StmtResult ActOnFinishFullStmt(Stmt *Stmt);
3589 // Marks SS invalid if it represents an incomplete type.
3590 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC);
3592 DeclContext *computeDeclContext(QualType T);
3593 DeclContext *computeDeclContext(const CXXScopeSpec &SS,
3594 bool EnteringContext = false);
3595 bool isDependentScopeSpecifier(const CXXScopeSpec &SS);
3596 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS);
3597 bool isUnknownSpecialization(const CXXScopeSpec &SS);
3599 /// \brief The parser has parsed a global nested-name-specifier '::'.
3601 /// \param S The scope in which this nested-name-specifier occurs.
3603 /// \param CCLoc The location of the '::'.
3605 /// \param SS The nested-name-specifier, which will be updated in-place
3606 /// to reflect the parsed nested-name-specifier.
3608 /// \returns true if an error occurred, false otherwise.
3609 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc,
3612 bool isAcceptableNestedNameSpecifier(NamedDecl *SD);
3613 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
3615 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
3616 SourceLocation IdLoc,
3618 ParsedType ObjectType);
3620 bool BuildCXXNestedNameSpecifier(Scope *S,
3621 IdentifierInfo &Identifier,
3622 SourceLocation IdentifierLoc,
3623 SourceLocation CCLoc,
3624 QualType ObjectType,
3625 bool EnteringContext,
3627 NamedDecl *ScopeLookupResult,
3628 bool ErrorRecoveryLookup);
3630 /// \brief The parser has parsed a nested-name-specifier 'identifier::'.
3632 /// \param S The scope in which this nested-name-specifier occurs.
3634 /// \param Identifier The identifier preceding the '::'.
3636 /// \param IdentifierLoc The location of the identifier.
3638 /// \param CCLoc The location of the '::'.
3640 /// \param ObjectType The type of the object, if we're parsing
3641 /// nested-name-specifier in a member access expression.
3643 /// \param EnteringContext Whether we're entering the context nominated by
3644 /// this nested-name-specifier.
3646 /// \param SS The nested-name-specifier, which is both an input
3647 /// parameter (the nested-name-specifier before this type) and an
3648 /// output parameter (containing the full nested-name-specifier,
3649 /// including this new type).
3651 /// \returns true if an error occurred, false otherwise.
3652 bool ActOnCXXNestedNameSpecifier(Scope *S,
3653 IdentifierInfo &Identifier,
3654 SourceLocation IdentifierLoc,
3655 SourceLocation CCLoc,
3656 ParsedType ObjectType,
3657 bool EnteringContext,
3660 ExprResult ActOnDecltypeExpression(Expr *E);
3662 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS,
3664 SourceLocation ColonColonLoc);
3666 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS,
3667 IdentifierInfo &Identifier,
3668 SourceLocation IdentifierLoc,
3669 SourceLocation ColonLoc,
3670 ParsedType ObjectType,
3671 bool EnteringContext);
3673 /// \brief The parser has parsed a nested-name-specifier
3674 /// 'template[opt] template-name < template-args >::'.
3676 /// \param S The scope in which this nested-name-specifier occurs.
3678 /// \param SS The nested-name-specifier, which is both an input
3679 /// parameter (the nested-name-specifier before this type) and an
3680 /// output parameter (containing the full nested-name-specifier,
3681 /// including this new type).
3683 /// \param TemplateKWLoc the location of the 'template' keyword, if any.
3684 /// \param TemplateName The template name.
3685 /// \param TemplateNameLoc The location of the template name.
3686 /// \param LAngleLoc The location of the opening angle bracket ('<').
3687 /// \param TemplateArgs The template arguments.
3688 /// \param RAngleLoc The location of the closing angle bracket ('>').
3689 /// \param CCLoc The location of the '::'.
3691 /// \param EnteringContext Whether we're entering the context of the
3692 /// nested-name-specifier.
3695 /// \returns true if an error occurred, false otherwise.
3696 bool ActOnCXXNestedNameSpecifier(Scope *S,
3698 SourceLocation TemplateKWLoc,
3699 TemplateTy Template,
3700 SourceLocation TemplateNameLoc,
3701 SourceLocation LAngleLoc,
3702 ASTTemplateArgsPtr TemplateArgs,
3703 SourceLocation RAngleLoc,
3704 SourceLocation CCLoc,
3705 bool EnteringContext);
3707 /// \brief Given a C++ nested-name-specifier, produce an annotation value
3708 /// that the parser can use later to reconstruct the given
3709 /// nested-name-specifier.
3711 /// \param SS A nested-name-specifier.
3713 /// \returns A pointer containing all of the information in the
3714 /// nested-name-specifier \p SS.
3715 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS);
3717 /// \brief Given an annotation pointer for a nested-name-specifier, restore
3718 /// the nested-name-specifier structure.
3720 /// \param Annotation The annotation pointer, produced by
3721 /// \c SaveNestedNameSpecifierAnnotation().
3723 /// \param AnnotationRange The source range corresponding to the annotation.
3725 /// \param SS The nested-name-specifier that will be updated with the contents
3726 /// of the annotation pointer.
3727 void RestoreNestedNameSpecifierAnnotation(void *Annotation,
3728 SourceRange AnnotationRange,
3731 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
3733 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global
3734 /// scope or nested-name-specifier) is parsed, part of a declarator-id.
3735 /// After this method is called, according to [C++ 3.4.3p3], names should be
3736 /// looked up in the declarator-id's scope, until the declarator is parsed and
3737 /// ActOnCXXExitDeclaratorScope is called.
3738 /// The 'SS' should be a non-empty valid CXXScopeSpec.
3739 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS);
3741 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously
3742 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same
3743 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well.
3744 /// Used to indicate that names should revert to being looked up in the
3746 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
3748 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an
3749 /// initializer for the declaration 'Dcl'.
3750 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a
3751 /// static data member of class X, names should be looked up in the scope of
3753 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl);
3755 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an
3756 /// initializer for the declaration 'Dcl'.
3757 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl);
3759 /// \brief Create a new lambda closure type.
3760 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange,
3761 bool KnownDependent = false);
3763 /// \brief Start the definition of a lambda expression.
3764 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class,
3765 SourceRange IntroducerRange,
3766 TypeSourceInfo *MethodType,
3767 SourceLocation EndLoc,
3768 llvm::ArrayRef<ParmVarDecl *> Params,
3769 llvm::Optional<unsigned> ManglingNumber
3770 = llvm::Optional<unsigned>(),
3771 Decl *ContextDecl = 0);
3773 /// \brief Introduce the scope for a lambda expression.
3774 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator,
3775 SourceRange IntroducerRange,
3776 LambdaCaptureDefault CaptureDefault,
3777 bool ExplicitParams,
3778 bool ExplicitResultType,
3781 /// \brief Note that we have finished the explicit captures for the
3783 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI);
3785 /// \brief Introduce the lambda parameters into scope.
3786 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope);
3788 /// ActOnStartOfLambdaDefinition - This is called just before we start
3789 /// parsing the body of a lambda; it analyzes the explicit captures and
3790 /// arguments, and sets up various data-structures for the body of the
3792 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
3793 Declarator &ParamInfo, Scope *CurScope);
3795 /// ActOnLambdaError - If there is an error parsing a lambda, this callback
3796 /// is invoked to pop the information about the lambda.
3797 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
3798 bool IsInstantiation = false);
3800 /// ActOnLambdaExpr - This is called when the body of a lambda expression
3801 /// was successfully completed.
3802 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
3804 bool IsInstantiation = false);
3806 /// \brief Define the "body" of the conversion from a lambda object to a
3807 /// function pointer.
3809 /// This routine doesn't actually define a sensible body; rather, it fills
3810 /// in the initialization expression needed to copy the lambda object into
3811 /// the block, and IR generation actually generates the real body of the
3812 /// block pointer conversion.
3813 void DefineImplicitLambdaToFunctionPointerConversion(
3814 SourceLocation CurrentLoc, CXXConversionDecl *Conv);
3816 /// \brief Define the "body" of the conversion from a lambda object to a
3819 /// This routine doesn't actually define a sensible body; rather, it fills
3820 /// in the initialization expression needed to copy the lambda object into
3821 /// the block, and IR generation actually generates the real body of the
3822 /// block pointer conversion.
3823 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc,
3824 CXXConversionDecl *Conv);
3826 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation,
3827 SourceLocation ConvLocation,
3828 CXXConversionDecl *Conv,
3831 // ParseObjCStringLiteral - Parse Objective-C string literals.
3832 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
3834 unsigned NumStrings);
3836 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S);
3838 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the
3839 /// numeric literal expression. Type of the expression will be "NSNumber *"
3840 /// or "id" if NSNumber is unavailable.
3841 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number);
3842 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc,
3844 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements);
3846 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr,
3848 ObjCMethodDecl *getterMethod,
3849 ObjCMethodDecl *setterMethod);
3851 ExprResult BuildObjCDictionaryLiteral(SourceRange SR,
3852 ObjCDictionaryElement *Elements,
3853 unsigned NumElements);
3855 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc,
3856 TypeSourceInfo *EncodedTypeInfo,
3857 SourceLocation RParenLoc);
3858 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl,
3859 CXXConversionDecl *Method,
3860 bool HadMultipleCandidates);
3862 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc,
3863 SourceLocation EncodeLoc,
3864 SourceLocation LParenLoc,
3866 SourceLocation RParenLoc);
3868 // ParseObjCSelectorExpression - Build selector expression for @selector
3869 ExprResult ParseObjCSelectorExpression(Selector Sel,
3870 SourceLocation AtLoc,
3871 SourceLocation SelLoc,
3872 SourceLocation LParenLoc,
3873 SourceLocation RParenLoc);
3875 // ParseObjCProtocolExpression - Build protocol expression for @protocol
3876 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName,
3877 SourceLocation AtLoc,
3878 SourceLocation ProtoLoc,
3879 SourceLocation LParenLoc,
3880 SourceLocation RParenLoc);
3882 //===--------------------------------------------------------------------===//
3885 Decl *ActOnStartLinkageSpecification(Scope *S,
3886 SourceLocation ExternLoc,
3887 SourceLocation LangLoc,
3889 SourceLocation LBraceLoc);
3890 Decl *ActOnFinishLinkageSpecification(Scope *S,
3892 SourceLocation RBraceLoc);
3895 //===--------------------------------------------------------------------===//
3898 bool isCurrentClassName(const IdentifierInfo &II, Scope *S,
3899 const CXXScopeSpec *SS = 0);
3901 bool ActOnAccessSpecifier(AccessSpecifier Access,
3902 SourceLocation ASLoc,
3903 SourceLocation ColonLoc,
3904 AttributeList *Attrs = 0);
3906 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
3908 MultiTemplateParamsArg TemplateParameterLists,
3909 Expr *BitfieldWidth, const VirtSpecifiers &VS,
3910 bool HasDeferredInit);
3911 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc,
3914 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
3917 IdentifierInfo *MemberOrBase,
3918 ParsedType TemplateTypeTy,
3920 SourceLocation IdLoc,
3921 SourceLocation LParenLoc,
3922 Expr **Args, unsigned NumArgs,
3923 SourceLocation RParenLoc,
3924 SourceLocation EllipsisLoc);
3926 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
3929 IdentifierInfo *MemberOrBase,
3930 ParsedType TemplateTypeTy,
3932 SourceLocation IdLoc,
3934 SourceLocation EllipsisLoc);
3936 MemInitResult BuildMemInitializer(Decl *ConstructorD,
3939 IdentifierInfo *MemberOrBase,
3940 ParsedType TemplateTypeTy,
3942 SourceLocation IdLoc,
3944 SourceLocation EllipsisLoc);
3946 MemInitResult BuildMemberInitializer(ValueDecl *Member,
3948 SourceLocation IdLoc);
3950 MemInitResult BuildBaseInitializer(QualType BaseType,
3951 TypeSourceInfo *BaseTInfo,
3953 CXXRecordDecl *ClassDecl,
3954 SourceLocation EllipsisLoc);
3956 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo,
3958 CXXRecordDecl *ClassDecl);
3960 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor,
3961 CXXCtorInitializer *Initializer);
3963 bool SetCtorInitializers(CXXConstructorDecl *Constructor,
3964 CXXCtorInitializer **Initializers,
3965 unsigned NumInitializers, bool AnyErrors);
3967 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation);
3970 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl,
3971 /// mark all the non-trivial destructors of its members and bases as
3973 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc,
3974 CXXRecordDecl *Record);
3976 /// \brief The list of classes whose vtables have been used within
3977 /// this translation unit, and the source locations at which the
3978 /// first use occurred.
3979 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse;
3981 /// \brief The list of vtables that are required but have not yet been
3983 SmallVector<VTableUse, 16> VTableUses;
3985 /// \brief The set of classes whose vtables have been used within
3986 /// this translation unit, and a bit that will be true if the vtable is
3987 /// required to be emitted (otherwise, it should be emitted only if needed
3988 /// by code generation).
3989 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed;
3991 /// \brief Load any externally-stored vtable uses.
3992 void LoadExternalVTableUses();
3994 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource,
3995 &ExternalSemaSource::ReadDynamicClasses, 2, 2>
3998 /// \brief A list of all of the dynamic classes in this translation
4000 DynamicClassesType DynamicClasses;
4002 /// \brief Note that the vtable for the given class was used at the
4004 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class,
4005 bool DefinitionRequired = false);
4007 /// MarkVirtualMembersReferenced - Will mark all members of the given
4008 /// CXXRecordDecl referenced.
4009 void MarkVirtualMembersReferenced(SourceLocation Loc,
4010 const CXXRecordDecl *RD);
4012 /// \brief Define all of the vtables that have been used in this
4013 /// translation unit and reference any virtual members used by those
4016 /// \returns true if any work was done, false otherwise.
4017 bool DefineUsedVTables();
4019 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl);
4021 void ActOnMemInitializers(Decl *ConstructorDecl,
4022 SourceLocation ColonLoc,
4023 CXXCtorInitializer **MemInits,
4024 unsigned NumMemInits,
4027 void CheckCompletedCXXClass(CXXRecordDecl *Record);
4028 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc,
4030 SourceLocation LBrac,
4031 SourceLocation RBrac,
4032 AttributeList *AttrList);
4033 void ActOnFinishCXXMemberDecls();
4035 void ActOnReenterTemplateScope(Scope *S, Decl *Template);
4036 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D);
4037 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record);
4038 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4039 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param);
4040 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record);
4041 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4042 void ActOnFinishDelayedMemberInitializers(Decl *Record);
4043 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true);
4044 bool IsInsideALocalClassWithinATemplateFunction();
4046 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc,
4048 Expr *AssertMessageExpr,
4049 SourceLocation RParenLoc);
4051 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc,
4052 SourceLocation FriendLoc,
4053 TypeSourceInfo *TSInfo);
4054 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
4055 MultiTemplateParamsArg TemplateParams);
4056 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
4057 MultiTemplateParamsArg TemplateParams);
4059 QualType CheckConstructorDeclarator(Declarator &D, QualType R,
4061 void CheckConstructor(CXXConstructorDecl *Constructor);
4062 QualType CheckDestructorDeclarator(Declarator &D, QualType R,
4064 bool CheckDestructor(CXXDestructorDecl *Destructor);
4065 void CheckConversionDeclarator(Declarator &D, QualType &R,
4067 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion);
4069 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record);
4070 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor);
4071 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor);
4072 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method);
4073 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor);
4074 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method);
4075 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor);
4077 //===--------------------------------------------------------------------===//
4078 // C++ Derived Classes
4081 /// ActOnBaseSpecifier - Parsed a base specifier
4082 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class,
4083 SourceRange SpecifierRange,
4084 bool Virtual, AccessSpecifier Access,
4085 TypeSourceInfo *TInfo,
4086 SourceLocation EllipsisLoc);
4088 BaseResult ActOnBaseSpecifier(Decl *classdecl,
4089 SourceRange SpecifierRange,
4090 bool Virtual, AccessSpecifier Access,
4091 ParsedType basetype,
4092 SourceLocation BaseLoc,
4093 SourceLocation EllipsisLoc);
4095 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases,
4097 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases,
4100 bool IsDerivedFrom(QualType Derived, QualType Base);
4101 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths);
4103 // FIXME: I don't like this name.
4104 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath);
4106 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath);
4108 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4109 SourceLocation Loc, SourceRange Range,
4110 CXXCastPath *BasePath = 0,
4111 bool IgnoreAccess = false);
4112 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4113 unsigned InaccessibleBaseID,
4114 unsigned AmbigiousBaseConvID,
4115 SourceLocation Loc, SourceRange Range,
4116 DeclarationName Name,
4117 CXXCastPath *BasePath);
4119 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths);
4121 /// CheckOverridingFunctionReturnType - Checks whether the return types are
4122 /// covariant, according to C++ [class.virtual]p5.
4123 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
4124 const CXXMethodDecl *Old);
4126 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception
4127 /// spec is a subset of base spec.
4128 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New,
4129 const CXXMethodDecl *Old);
4131 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange);
4133 /// CheckOverrideControl - Check C++0x override control semantics.
4134 void CheckOverrideControl(const Decl *D);
4136 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function
4137 /// overrides a virtual member function marked 'final', according to
4138 /// C++0x [class.virtual]p3.
4139 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New,
4140 const CXXMethodDecl *Old);
4143 //===--------------------------------------------------------------------===//
4144 // C++ Access Control
4154 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl,
4155 NamedDecl *PrevMemberDecl,
4156 AccessSpecifier LexicalAS);
4158 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E,
4159 DeclAccessPair FoundDecl);
4160 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E,
4161 DeclAccessPair FoundDecl);
4162 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc,
4163 SourceRange PlacementRange,
4164 CXXRecordDecl *NamingClass,
4165 DeclAccessPair FoundDecl,
4166 bool Diagnose = true);
4167 AccessResult CheckConstructorAccess(SourceLocation Loc,
4168 CXXConstructorDecl *D,
4169 const InitializedEntity &Entity,
4170 AccessSpecifier Access,
4171 bool IsCopyBindingRefToTemp = false);
4172 AccessResult CheckConstructorAccess(SourceLocation Loc,
4173 CXXConstructorDecl *D,
4174 const InitializedEntity &Entity,
4175 AccessSpecifier Access,
4176 const PartialDiagnostic &PDiag);
4177 AccessResult CheckDestructorAccess(SourceLocation Loc,
4178 CXXDestructorDecl *Dtor,
4179 const PartialDiagnostic &PDiag,
4180 QualType objectType = QualType());
4181 AccessResult CheckDirectMemberAccess(SourceLocation Loc,
4183 const PartialDiagnostic &PDiag);
4184 AccessResult CheckMemberOperatorAccess(SourceLocation Loc,
4187 DeclAccessPair FoundDecl);
4188 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr,
4189 DeclAccessPair FoundDecl);
4190 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc,
4191 QualType Base, QualType Derived,
4192 const CXXBasePath &Path,
4194 bool ForceCheck = false,
4195 bool ForceUnprivileged = false);
4196 void CheckLookupAccess(const LookupResult &R);
4197 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx);
4198 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl,
4199 AccessSpecifier access,
4200 QualType objectType);
4202 void HandleDependentAccessCheck(const DependentDiagnostic &DD,
4203 const MultiLevelTemplateArgumentList &TemplateArgs);
4204 void PerformDependentDiagnostics(const DeclContext *Pattern,
4205 const MultiLevelTemplateArgumentList &TemplateArgs);
4207 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
4209 /// A flag to suppress access checking.
4210 bool SuppressAccessChecking;
4212 /// \brief When true, access checking violations are treated as SFINAE
4213 /// failures rather than hard errors.
4214 bool AccessCheckingSFINAE;
4216 /// \brief RAII object used to temporarily suppress access checking.
4217 class SuppressAccessChecksRAII {
4219 bool SuppressingAccess;
4222 SuppressAccessChecksRAII(Sema &S, bool Suppress)
4223 : S(S), SuppressingAccess(Suppress) {
4224 if (Suppress) S.ActOnStartSuppressingAccessChecks();
4226 ~SuppressAccessChecksRAII() {
4230 if (!SuppressingAccess) return;
4231 S.ActOnStopSuppressingAccessChecks();
4232 SuppressingAccess = false;
4236 void ActOnStartSuppressingAccessChecks();
4237 void ActOnStopSuppressingAccessChecks();
4239 enum AbstractDiagSelID {
4243 AbstractVariableType,
4248 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4249 const PartialDiagnostic &PD);
4250 void DiagnoseAbstractType(const CXXRecordDecl *RD);
4252 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID,
4253 AbstractDiagSelID SelID = AbstractNone);
4255 //===--------------------------------------------------------------------===//
4256 // C++ Overloaded Operators [C++ 13.5]
4259 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl);
4261 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl);
4263 //===--------------------------------------------------------------------===//
4264 // C++ Templates [C++ 14]
4266 void FilterAcceptableTemplateNames(LookupResult &R,
4267 bool AllowFunctionTemplates = true);
4268 bool hasAnyAcceptableTemplateNames(LookupResult &R,
4269 bool AllowFunctionTemplates = true);
4271 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS,
4272 QualType ObjectType, bool EnteringContext,
4273 bool &MemberOfUnknownSpecialization);
4275 TemplateNameKind isTemplateName(Scope *S,
4277 bool hasTemplateKeyword,
4278 UnqualifiedId &Name,
4279 ParsedType ObjectType,
4280 bool EnteringContext,
4281 TemplateTy &Template,
4282 bool &MemberOfUnknownSpecialization);
4284 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II,
4285 SourceLocation IILoc,
4287 const CXXScopeSpec *SS,
4288 TemplateTy &SuggestedTemplate,
4289 TemplateNameKind &SuggestedKind);
4291 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl);
4292 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl);
4294 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis,
4295 SourceLocation EllipsisLoc,
4296 SourceLocation KeyLoc,
4297 IdentifierInfo *ParamName,
4298 SourceLocation ParamNameLoc,
4299 unsigned Depth, unsigned Position,
4300 SourceLocation EqualLoc,
4301 ParsedType DefaultArg);
4303 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc);
4304 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D,
4307 SourceLocation EqualLoc,
4309 Decl *ActOnTemplateTemplateParameter(Scope *S,
4310 SourceLocation TmpLoc,
4311 TemplateParameterList *Params,
4312 SourceLocation EllipsisLoc,
4313 IdentifierInfo *ParamName,
4314 SourceLocation ParamNameLoc,
4317 SourceLocation EqualLoc,
4318 ParsedTemplateArgument DefaultArg);
4320 TemplateParameterList *
4321 ActOnTemplateParameterList(unsigned Depth,
4322 SourceLocation ExportLoc,
4323 SourceLocation TemplateLoc,
4324 SourceLocation LAngleLoc,
4325 Decl **Params, unsigned NumParams,
4326 SourceLocation RAngleLoc);
4328 /// \brief The context in which we are checking a template parameter
4330 enum TemplateParamListContext {
4332 TPC_FunctionTemplate,
4333 TPC_ClassTemplateMember,
4334 TPC_FriendFunctionTemplate,
4335 TPC_FriendFunctionTemplateDefinition,
4336 TPC_TypeAliasTemplate
4339 bool CheckTemplateParameterList(TemplateParameterList *NewParams,
4340 TemplateParameterList *OldParams,
4341 TemplateParamListContext TPC);
4342 TemplateParameterList *
4343 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc,
4344 SourceLocation DeclLoc,
4345 const CXXScopeSpec &SS,
4346 TemplateParameterList **ParamLists,
4347 unsigned NumParamLists,
4349 bool &IsExplicitSpecialization,
4352 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
4353 SourceLocation KWLoc, CXXScopeSpec &SS,
4354 IdentifierInfo *Name, SourceLocation NameLoc,
4355 AttributeList *Attr,
4356 TemplateParameterList *TemplateParams,
4358 SourceLocation ModulePrivateLoc,
4359 unsigned NumOuterTemplateParamLists,
4360 TemplateParameterList **OuterTemplateParamLists);
4362 void translateTemplateArguments(const ASTTemplateArgsPtr &In,
4363 TemplateArgumentListInfo &Out);
4365 void NoteAllFoundTemplates(TemplateName Name);
4367 QualType CheckTemplateIdType(TemplateName Template,
4368 SourceLocation TemplateLoc,
4369 TemplateArgumentListInfo &TemplateArgs);
4372 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4373 TemplateTy Template, SourceLocation TemplateLoc,
4374 SourceLocation LAngleLoc,
4375 ASTTemplateArgsPtr TemplateArgs,
4376 SourceLocation RAngleLoc,
4377 bool IsCtorOrDtorName = false);
4379 /// \brief Parsed an elaborated-type-specifier that refers to a template-id,
4380 /// such as \c class T::template apply<U>.
4383 TypeResult ActOnTagTemplateIdType(TagUseKind TUK,
4384 TypeSpecifierType TagSpec,
4385 SourceLocation TagLoc,
4387 SourceLocation TemplateKWLoc,
4388 TemplateTy TemplateD,
4389 SourceLocation TemplateLoc,
4390 SourceLocation LAngleLoc,
4391 ASTTemplateArgsPtr TemplateArgsIn,
4392 SourceLocation RAngleLoc);
4395 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS,
4396 SourceLocation TemplateKWLoc,
4399 const TemplateArgumentListInfo *TemplateArgs);
4401 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS,
4402 SourceLocation TemplateKWLoc,
4403 const DeclarationNameInfo &NameInfo,
4404 const TemplateArgumentListInfo *TemplateArgs);
4406 TemplateNameKind ActOnDependentTemplateName(Scope *S,
4408 SourceLocation TemplateKWLoc,
4409 UnqualifiedId &Name,
4410 ParsedType ObjectType,
4411 bool EnteringContext,
4412 TemplateTy &Template);
4415 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK,
4416 SourceLocation KWLoc,
4417 SourceLocation ModulePrivateLoc,
4419 TemplateTy Template,
4420 SourceLocation TemplateNameLoc,
4421 SourceLocation LAngleLoc,
4422 ASTTemplateArgsPtr TemplateArgs,
4423 SourceLocation RAngleLoc,
4424 AttributeList *Attr,
4425 MultiTemplateParamsArg TemplateParameterLists);
4427 Decl *ActOnTemplateDeclarator(Scope *S,
4428 MultiTemplateParamsArg TemplateParameterLists,
4431 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope,
4432 MultiTemplateParamsArg TemplateParameterLists,
4436 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc,
4437 TemplateSpecializationKind NewTSK,
4438 NamedDecl *PrevDecl,
4439 TemplateSpecializationKind PrevTSK,
4440 SourceLocation PrevPtOfInstantiation,
4443 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD,
4444 const TemplateArgumentListInfo &ExplicitTemplateArgs,
4445 LookupResult &Previous);
4447 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD,
4448 TemplateArgumentListInfo *ExplicitTemplateArgs,
4449 LookupResult &Previous);
4450 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous);
4453 ActOnExplicitInstantiation(Scope *S,
4454 SourceLocation ExternLoc,
4455 SourceLocation TemplateLoc,
4457 SourceLocation KWLoc,
4458 const CXXScopeSpec &SS,
4459 TemplateTy Template,
4460 SourceLocation TemplateNameLoc,
4461 SourceLocation LAngleLoc,
4462 ASTTemplateArgsPtr TemplateArgs,
4463 SourceLocation RAngleLoc,
4464 AttributeList *Attr);
4467 ActOnExplicitInstantiation(Scope *S,
4468 SourceLocation ExternLoc,
4469 SourceLocation TemplateLoc,
4471 SourceLocation KWLoc,
4473 IdentifierInfo *Name,
4474 SourceLocation NameLoc,
4475 AttributeList *Attr);
4477 DeclResult ActOnExplicitInstantiation(Scope *S,
4478 SourceLocation ExternLoc,
4479 SourceLocation TemplateLoc,
4483 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
4484 SourceLocation TemplateLoc,
4485 SourceLocation RAngleLoc,
4487 SmallVectorImpl<TemplateArgument> &Converted);
4489 /// \brief Specifies the context in which a particular template
4490 /// argument is being checked.
4491 enum CheckTemplateArgumentKind {
4492 /// \brief The template argument was specified in the code or was
4493 /// instantiated with some deduced template arguments.
4496 /// \brief The template argument was deduced via template argument
4500 /// \brief The template argument was deduced from an array bound
4501 /// via template argument deduction.
4502 CTAK_DeducedFromArrayBound
4505 bool CheckTemplateArgument(NamedDecl *Param,
4506 const TemplateArgumentLoc &Arg,
4507 NamedDecl *Template,
4508 SourceLocation TemplateLoc,
4509 SourceLocation RAngleLoc,
4510 unsigned ArgumentPackIndex,
4511 SmallVectorImpl<TemplateArgument> &Converted,
4512 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4514 /// \brief Check that the given template arguments can be be provided to
4515 /// the given template, converting the arguments along the way.
4517 /// \param Template The template to which the template arguments are being
4520 /// \param TemplateLoc The location of the template name in the source.
4522 /// \param TemplateArgs The list of template arguments. If the template is
4523 /// a template template parameter, this function may extend the set of
4524 /// template arguments to also include substituted, defaulted template
4527 /// \param PartialTemplateArgs True if the list of template arguments is
4528 /// intentionally partial, e.g., because we're checking just the initial
4529 /// set of template arguments.
4531 /// \param Converted Will receive the converted, canonicalized template
4535 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate
4536 /// when the template arguments contain a pack expansion that is being
4537 /// expanded into a fixed parameter list.
4539 /// \returns True if an error occurred, false otherwise.
4540 bool CheckTemplateArgumentList(TemplateDecl *Template,
4541 SourceLocation TemplateLoc,
4542 TemplateArgumentListInfo &TemplateArgs,
4543 bool PartialTemplateArgs,
4544 SmallVectorImpl<TemplateArgument> &Converted,
4545 bool *ExpansionIntoFixedList = 0);
4547 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param,
4548 const TemplateArgumentLoc &Arg,
4549 SmallVectorImpl<TemplateArgument> &Converted);
4551 bool CheckTemplateArgument(TemplateTypeParmDecl *Param,
4552 TypeSourceInfo *Arg);
4553 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
4554 QualType InstantiatedParamType, Expr *Arg,
4555 TemplateArgument &Converted,
4556 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4557 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param,
4558 const TemplateArgumentLoc &Arg);
4561 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
4563 SourceLocation Loc);
4565 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
4566 SourceLocation Loc);
4568 /// \brief Enumeration describing how template parameter lists are compared
4570 enum TemplateParameterListEqualKind {
4571 /// \brief We are matching the template parameter lists of two templates
4572 /// that might be redeclarations.
4575 /// template<typename T> struct X;
4576 /// template<typename T> struct X;
4580 /// \brief We are matching the template parameter lists of two template
4581 /// template parameters as part of matching the template parameter lists
4582 /// of two templates that might be redeclarations.
4585 /// template<template<int I> class TT> struct X;
4586 /// template<template<int Value> class Other> struct X;
4588 TPL_TemplateTemplateParmMatch,
4590 /// \brief We are matching the template parameter lists of a template
4591 /// template argument against the template parameter lists of a template
4592 /// template parameter.
4595 /// template<template<int Value> class Metafun> struct X;
4596 /// template<int Value> struct integer_c;
4597 /// X<integer_c> xic;
4599 TPL_TemplateTemplateArgumentMatch
4602 bool TemplateParameterListsAreEqual(TemplateParameterList *New,
4603 TemplateParameterList *Old,
4605 TemplateParameterListEqualKind Kind,
4606 SourceLocation TemplateArgLoc
4607 = SourceLocation());
4609 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams);
4611 /// \brief Called when the parser has parsed a C++ typename
4612 /// specifier, e.g., "typename T::type".
4614 /// \param S The scope in which this typename type occurs.
4615 /// \param TypenameLoc the location of the 'typename' keyword
4616 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4617 /// \param II the identifier we're retrieving (e.g., 'type' in the example).
4618 /// \param IdLoc the location of the identifier.
4620 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4621 const CXXScopeSpec &SS, const IdentifierInfo &II,
4622 SourceLocation IdLoc);
4624 /// \brief Called when the parser has parsed a C++ typename
4625 /// specifier that ends in a template-id, e.g.,
4626 /// "typename MetaFun::template apply<T1, T2>".
4628 /// \param S The scope in which this typename type occurs.
4629 /// \param TypenameLoc the location of the 'typename' keyword
4630 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4631 /// \param TemplateLoc the location of the 'template' keyword, if any.
4632 /// \param TemplateName The template name.
4633 /// \param TemplateNameLoc The location of the template name.
4634 /// \param LAngleLoc The location of the opening angle bracket ('<').
4635 /// \param TemplateArgs The template arguments.
4636 /// \param RAngleLoc The location of the closing angle bracket ('>').
4638 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4639 const CXXScopeSpec &SS,
4640 SourceLocation TemplateLoc,
4641 TemplateTy Template,
4642 SourceLocation TemplateNameLoc,
4643 SourceLocation LAngleLoc,
4644 ASTTemplateArgsPtr TemplateArgs,
4645 SourceLocation RAngleLoc);
4647 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword,
4648 SourceLocation KeywordLoc,
4649 NestedNameSpecifierLoc QualifierLoc,
4650 const IdentifierInfo &II,
4651 SourceLocation IILoc);
4653 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T,
4655 DeclarationName Name);
4656 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS);
4658 ExprResult RebuildExprInCurrentInstantiation(Expr *E);
4659 bool RebuildTemplateParamsInCurrentInstantiation(
4660 TemplateParameterList *Params);
4663 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
4664 const TemplateArgumentList &Args);
4667 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
4668 const TemplateArgument *Args,
4671 //===--------------------------------------------------------------------===//
4672 // C++ Variadic Templates (C++0x [temp.variadic])
4673 //===--------------------------------------------------------------------===//
4675 /// \brief The context in which an unexpanded parameter pack is
4676 /// being diagnosed.
4678 /// Note that the values of this enumeration line up with the first
4679 /// argument to the \c err_unexpanded_parameter_pack diagnostic.
4680 enum UnexpandedParameterPackContext {
4681 /// \brief An arbitrary expression.
4682 UPPC_Expression = 0,
4684 /// \brief The base type of a class type.
4687 /// \brief The type of an arbitrary declaration.
4688 UPPC_DeclarationType,
4690 /// \brief The type of a data member.
4691 UPPC_DataMemberType,
4693 /// \brief The size of a bit-field.
4696 /// \brief The expression in a static assertion.
4697 UPPC_StaticAssertExpression,
4699 /// \brief The fixed underlying type of an enumeration.
4700 UPPC_FixedUnderlyingType,
4702 /// \brief The enumerator value.
4703 UPPC_EnumeratorValue,
4705 /// \brief A using declaration.
4706 UPPC_UsingDeclaration,
4708 /// \brief A friend declaration.
4709 UPPC_FriendDeclaration,
4711 /// \brief A declaration qualifier.
4712 UPPC_DeclarationQualifier,
4714 /// \brief An initializer.
4717 /// \brief A default argument.
4718 UPPC_DefaultArgument,
4720 /// \brief The type of a non-type template parameter.
4721 UPPC_NonTypeTemplateParameterType,
4723 /// \brief The type of an exception.
4726 /// \brief Partial specialization.
4727 UPPC_PartialSpecialization,
4729 /// \brief Microsoft __if_exists.
4732 /// \brief Microsoft __if_not_exists.
4736 /// \brief Diagnose unexpanded parameter packs.
4738 /// \param Loc The location at which we should emit the diagnostic.
4740 /// \param UPPC The context in which we are diagnosing unexpanded
4741 /// parameter packs.
4743 /// \param Unexpanded the set of unexpanded parameter packs.
4744 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc,
4745 UnexpandedParameterPackContext UPPC,
4746 ArrayRef<UnexpandedParameterPack> Unexpanded);
4748 /// \brief If the given type contains an unexpanded parameter pack,
4749 /// diagnose the error.
4751 /// \param Loc The source location where a diagnostc should be emitted.
4753 /// \param T The type that is being checked for unexpanded parameter
4756 /// \returns true if an error occurred, false otherwise.
4757 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T,
4758 UnexpandedParameterPackContext UPPC);
4760 /// \brief If the given expression contains an unexpanded parameter
4761 /// pack, diagnose the error.
4763 /// \param E The expression that is being checked for unexpanded
4764 /// parameter packs.
4766 /// \returns true if an error occurred, false otherwise.
4767 bool DiagnoseUnexpandedParameterPack(Expr *E,
4768 UnexpandedParameterPackContext UPPC = UPPC_Expression);
4770 /// \brief If the given nested-name-specifier contains an unexpanded
4771 /// parameter pack, diagnose the error.
4773 /// \param SS The nested-name-specifier that is being checked for
4774 /// unexpanded parameter packs.
4776 /// \returns true if an error occurred, false otherwise.
4777 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS,
4778 UnexpandedParameterPackContext UPPC);
4780 /// \brief If the given name contains an unexpanded parameter pack,
4781 /// diagnose the error.
4783 /// \param NameInfo The name (with source location information) that
4784 /// is being checked for unexpanded parameter packs.
4786 /// \returns true if an error occurred, false otherwise.
4787 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo,
4788 UnexpandedParameterPackContext UPPC);
4790 /// \brief If the given template name contains an unexpanded parameter pack,
4791 /// diagnose the error.
4793 /// \param Loc The location of the template name.
4795 /// \param Template The template name that is being checked for unexpanded
4796 /// parameter packs.
4798 /// \returns true if an error occurred, false otherwise.
4799 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc,
4800 TemplateName Template,
4801 UnexpandedParameterPackContext UPPC);
4803 /// \brief If the given template argument contains an unexpanded parameter
4804 /// pack, diagnose the error.
4806 /// \param Arg The template argument that is being checked for unexpanded
4807 /// parameter packs.
4809 /// \returns true if an error occurred, false otherwise.
4810 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg,
4811 UnexpandedParameterPackContext UPPC);
4813 /// \brief Collect the set of unexpanded parameter packs within the given
4814 /// template argument.
4816 /// \param Arg The template argument that will be traversed to find
4817 /// unexpanded parameter packs.
4818 void collectUnexpandedParameterPacks(TemplateArgument Arg,
4819 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4821 /// \brief Collect the set of unexpanded parameter packs within the given
4822 /// template argument.
4824 /// \param Arg The template argument that will be traversed to find
4825 /// unexpanded parameter packs.
4826 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg,
4827 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4829 /// \brief Collect the set of unexpanded parameter packs within the given
4832 /// \param T The type that will be traversed to find
4833 /// unexpanded parameter packs.
4834 void collectUnexpandedParameterPacks(QualType T,
4835 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4837 /// \brief Collect the set of unexpanded parameter packs within the given
4840 /// \param TL The type that will be traversed to find
4841 /// unexpanded parameter packs.
4842 void collectUnexpandedParameterPacks(TypeLoc TL,
4843 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4845 /// \brief Collect the set of unexpanded parameter packs within the given
4846 /// nested-name-specifier.
4848 /// \param SS The nested-name-specifier that will be traversed to find
4849 /// unexpanded parameter packs.
4850 void collectUnexpandedParameterPacks(CXXScopeSpec &SS,
4851 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4853 /// \brief Collect the set of unexpanded parameter packs within the given
4856 /// \param NameInfo The name that will be traversed to find
4857 /// unexpanded parameter packs.
4858 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo,
4859 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4861 /// \brief Invoked when parsing a template argument followed by an
4862 /// ellipsis, which creates a pack expansion.
4864 /// \param Arg The template argument preceding the ellipsis, which
4865 /// may already be invalid.
4867 /// \param EllipsisLoc The location of the ellipsis.
4868 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg,
4869 SourceLocation EllipsisLoc);
4871 /// \brief Invoked when parsing a type followed by an ellipsis, which
4872 /// creates a pack expansion.
4874 /// \param Type The type preceding the ellipsis, which will become
4875 /// the pattern of the pack expansion.
4877 /// \param EllipsisLoc The location of the ellipsis.
4878 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc);
4880 /// \brief Construct a pack expansion type from the pattern of the pack
4882 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern,
4883 SourceLocation EllipsisLoc,
4884 llvm::Optional<unsigned> NumExpansions);
4886 /// \brief Construct a pack expansion type from the pattern of the pack
4888 QualType CheckPackExpansion(QualType Pattern,
4889 SourceRange PatternRange,
4890 SourceLocation EllipsisLoc,
4891 llvm::Optional<unsigned> NumExpansions);
4893 /// \brief Invoked when parsing an expression followed by an ellipsis, which
4894 /// creates a pack expansion.
4896 /// \param Pattern The expression preceding the ellipsis, which will become
4897 /// the pattern of the pack expansion.
4899 /// \param EllipsisLoc The location of the ellipsis.
4900 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc);
4902 /// \brief Invoked when parsing an expression followed by an ellipsis, which
4903 /// creates a pack expansion.
4905 /// \param Pattern The expression preceding the ellipsis, which will become
4906 /// the pattern of the pack expansion.
4908 /// \param EllipsisLoc The location of the ellipsis.
4909 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc,
4910 llvm::Optional<unsigned> NumExpansions);
4912 /// \brief Determine whether we could expand a pack expansion with the
4913 /// given set of parameter packs into separate arguments by repeatedly
4914 /// transforming the pattern.
4916 /// \param EllipsisLoc The location of the ellipsis that identifies the
4919 /// \param PatternRange The source range that covers the entire pattern of
4920 /// the pack expansion.
4922 /// \param Unexpanded The set of unexpanded parameter packs within the
4925 /// \param NumUnexpanded The number of unexpanded parameter packs in
4928 /// \param ShouldExpand Will be set to \c true if the transformer should
4929 /// expand the corresponding pack expansions into separate arguments. When
4930 /// set, \c NumExpansions must also be set.
4932 /// \param RetainExpansion Whether the caller should add an unexpanded
4933 /// pack expansion after all of the expanded arguments. This is used
4934 /// when extending explicitly-specified template argument packs per
4935 /// C++0x [temp.arg.explicit]p9.
4937 /// \param NumExpansions The number of separate arguments that will be in
4938 /// the expanded form of the corresponding pack expansion. This is both an
4939 /// input and an output parameter, which can be set by the caller if the
4940 /// number of expansions is known a priori (e.g., due to a prior substitution)
4941 /// and will be set by the callee when the number of expansions is known.
4942 /// The callee must set this value when \c ShouldExpand is \c true; it may
4943 /// set this value in other cases.
4945 /// \returns true if an error occurred (e.g., because the parameter packs
4946 /// are to be instantiated with arguments of different lengths), false
4947 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
4949 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc,
4950 SourceRange PatternRange,
4951 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded,
4952 const MultiLevelTemplateArgumentList &TemplateArgs,
4954 bool &RetainExpansion,
4955 llvm::Optional<unsigned> &NumExpansions);
4957 /// \brief Determine the number of arguments in the given pack expansion
4960 /// This routine already assumes that the pack expansion type can be
4961 /// expanded and that the number of arguments in the expansion is
4962 /// consistent across all of the unexpanded parameter packs in its pattern.
4963 unsigned getNumArgumentsInExpansion(QualType T,
4964 const MultiLevelTemplateArgumentList &TemplateArgs);
4966 /// \brief Determine whether the given declarator contains any unexpanded
4967 /// parameter packs.
4969 /// This routine is used by the parser to disambiguate function declarators
4970 /// with an ellipsis prior to the ')', e.g.,
4976 /// To determine whether we have an (unnamed) function parameter pack or
4977 /// a variadic function.
4979 /// \returns true if the declarator contains any unexpanded parameter packs,
4980 /// false otherwise.
4981 bool containsUnexpandedParameterPacks(Declarator &D);
4983 //===--------------------------------------------------------------------===//
4984 // C++ Template Argument Deduction (C++ [temp.deduct])
4985 //===--------------------------------------------------------------------===//
4987 /// \brief Describes the result of template argument deduction.
4989 /// The TemplateDeductionResult enumeration describes the result of
4990 /// template argument deduction, as returned from
4991 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo
4992 /// structure provides additional information about the results of
4993 /// template argument deduction, e.g., the deduced template argument
4994 /// list (if successful) or the specific template parameters or
4995 /// deduced arguments that were involved in the failure.
4996 enum TemplateDeductionResult {
4997 /// \brief Template argument deduction was successful.
4999 /// \brief Template argument deduction exceeded the maximum template
5000 /// instantiation depth (which has already been diagnosed).
5001 TDK_InstantiationDepth,
5002 /// \brief Template argument deduction did not deduce a value
5003 /// for every template parameter.
5005 /// \brief Template argument deduction produced inconsistent
5006 /// deduced values for the given template parameter.
5008 /// \brief Template argument deduction failed due to inconsistent
5009 /// cv-qualifiers on a template parameter type that would
5010 /// otherwise be deduced, e.g., we tried to deduce T in "const T"
5011 /// but were given a non-const "X".
5013 /// \brief Substitution of the deduced template argument values
5014 /// resulted in an error.
5015 TDK_SubstitutionFailure,
5016 /// \brief Substitution of the deduced template argument values
5017 /// into a non-deduced context produced a type or value that
5018 /// produces a type that does not match the original template
5019 /// arguments provided.
5020 TDK_NonDeducedMismatch,
5021 /// \brief When performing template argument deduction for a function
5022 /// template, there were too many call arguments.
5023 TDK_TooManyArguments,
5024 /// \brief When performing template argument deduction for a function
5025 /// template, there were too few call arguments.
5026 TDK_TooFewArguments,
5027 /// \brief The explicitly-specified template arguments were not valid
5028 /// template arguments for the given template.
5029 TDK_InvalidExplicitArguments,
5030 /// \brief The arguments included an overloaded function name that could
5031 /// not be resolved to a suitable function.
5032 TDK_FailedOverloadResolution
5035 TemplateDeductionResult
5036 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial,
5037 const TemplateArgumentList &TemplateArgs,
5038 sema::TemplateDeductionInfo &Info);
5040 TemplateDeductionResult
5041 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5042 TemplateArgumentListInfo &ExplicitTemplateArgs,
5043 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5044 SmallVectorImpl<QualType> &ParamTypes,
5045 QualType *FunctionType,
5046 sema::TemplateDeductionInfo &Info);
5048 /// brief A function argument from which we performed template argument
5049 // deduction for a call.
5050 struct OriginalCallArg {
5051 OriginalCallArg(QualType OriginalParamType,
5053 QualType OriginalArgType)
5054 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx),
5055 OriginalArgType(OriginalArgType) { }
5057 QualType OriginalParamType;
5059 QualType OriginalArgType;
5062 TemplateDeductionResult
5063 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate,
5064 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5065 unsigned NumExplicitlySpecified,
5066 FunctionDecl *&Specialization,
5067 sema::TemplateDeductionInfo &Info,
5068 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0);
5070 TemplateDeductionResult
5071 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5072 TemplateArgumentListInfo *ExplicitTemplateArgs,
5073 llvm::ArrayRef<Expr *> Args,
5074 FunctionDecl *&Specialization,
5075 sema::TemplateDeductionInfo &Info);
5077 TemplateDeductionResult
5078 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5079 TemplateArgumentListInfo *ExplicitTemplateArgs,
5080 QualType ArgFunctionType,
5081 FunctionDecl *&Specialization,
5082 sema::TemplateDeductionInfo &Info);
5084 TemplateDeductionResult
5085 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5087 CXXConversionDecl *&Specialization,
5088 sema::TemplateDeductionInfo &Info);
5090 TemplateDeductionResult
5091 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5092 TemplateArgumentListInfo *ExplicitTemplateArgs,
5093 FunctionDecl *&Specialization,
5094 sema::TemplateDeductionInfo &Info);
5096 /// \brief Result type of DeduceAutoType.
5097 enum DeduceAutoResult {
5100 DAR_FailedAlreadyDiagnosed
5103 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer,
5104 TypeSourceInfo *&Result);
5105 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init);
5107 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1,
5108 FunctionTemplateDecl *FT2,
5110 TemplatePartialOrderingContext TPOC,
5111 unsigned NumCallArguments);
5112 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin,
5113 UnresolvedSetIterator SEnd,
5114 TemplatePartialOrderingContext TPOC,
5115 unsigned NumCallArguments,
5117 const PartialDiagnostic &NoneDiag,
5118 const PartialDiagnostic &AmbigDiag,
5119 const PartialDiagnostic &CandidateDiag,
5120 bool Complain = true,
5121 QualType TargetType = QualType());
5123 ClassTemplatePartialSpecializationDecl *
5124 getMoreSpecializedPartialSpecialization(
5125 ClassTemplatePartialSpecializationDecl *PS1,
5126 ClassTemplatePartialSpecializationDecl *PS2,
5127 SourceLocation Loc);
5129 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs,
5132 llvm::SmallBitVector &Used);
5133 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate,
5134 llvm::SmallBitVector &Deduced) {
5135 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced);
5137 static void MarkDeducedTemplateParameters(ASTContext &Ctx,
5138 FunctionTemplateDecl *FunctionTemplate,
5139 llvm::SmallBitVector &Deduced);
5141 //===--------------------------------------------------------------------===//
5142 // C++ Template Instantiation
5145 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D,
5146 const TemplateArgumentList *Innermost = 0,
5147 bool RelativeToPrimary = false,
5148 const FunctionDecl *Pattern = 0);
5150 /// \brief A template instantiation that is currently in progress.
5151 struct ActiveTemplateInstantiation {
5152 /// \brief The kind of template instantiation we are performing
5153 enum InstantiationKind {
5154 /// We are instantiating a template declaration. The entity is
5155 /// the declaration we're instantiating (e.g., a CXXRecordDecl).
5156 TemplateInstantiation,
5158 /// We are instantiating a default argument for a template
5159 /// parameter. The Entity is the template, and
5160 /// TemplateArgs/NumTemplateArguments provides the template
5161 /// arguments as specified.
5162 /// FIXME: Use a TemplateArgumentList
5163 DefaultTemplateArgumentInstantiation,
5165 /// We are instantiating a default argument for a function.
5166 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs
5167 /// provides the template arguments as specified.
5168 DefaultFunctionArgumentInstantiation,
5170 /// We are substituting explicit template arguments provided for
5171 /// a function template. The entity is a FunctionTemplateDecl.
5172 ExplicitTemplateArgumentSubstitution,
5174 /// We are substituting template argument determined as part of
5175 /// template argument deduction for either a class template
5176 /// partial specialization or a function template. The
5177 /// Entity is either a ClassTemplatePartialSpecializationDecl or
5178 /// a FunctionTemplateDecl.
5179 DeducedTemplateArgumentSubstitution,
5181 /// We are substituting prior template arguments into a new
5182 /// template parameter. The template parameter itself is either a
5183 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl.
5184 PriorTemplateArgumentSubstitution,
5186 /// We are checking the validity of a default template argument that
5187 /// has been used when naming a template-id.
5188 DefaultTemplateArgumentChecking,
5190 /// We are instantiating the exception specification for a function
5191 /// template which was deferred until it was needed.
5192 ExceptionSpecInstantiation
5195 /// \brief The point of instantiation within the source code.
5196 SourceLocation PointOfInstantiation;
5198 /// \brief The template (or partial specialization) in which we are
5199 /// performing the instantiation, for substitutions of prior template
5201 NamedDecl *Template;
5203 /// \brief The entity that is being instantiated.
5206 /// \brief The list of template arguments we are substituting, if they
5207 /// are not part of the entity.
5208 const TemplateArgument *TemplateArgs;
5210 /// \brief The number of template arguments in TemplateArgs.
5211 unsigned NumTemplateArgs;
5213 /// \brief The template deduction info object associated with the
5214 /// substitution or checking of explicit or deduced template arguments.
5215 sema::TemplateDeductionInfo *DeductionInfo;
5217 /// \brief The source range that covers the construct that cause
5218 /// the instantiation, e.g., the template-id that causes a class
5219 /// template instantiation.
5220 SourceRange InstantiationRange;
5222 ActiveTemplateInstantiation()
5223 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0),
5224 NumTemplateArgs(0), DeductionInfo(0) {}
5226 /// \brief Determines whether this template is an actual instantiation
5227 /// that should be counted toward the maximum instantiation depth.
5228 bool isInstantiationRecord() const;
5230 friend bool operator==(const ActiveTemplateInstantiation &X,
5231 const ActiveTemplateInstantiation &Y) {
5232 if (X.Kind != Y.Kind)
5235 if (X.Entity != Y.Entity)
5239 case TemplateInstantiation:
5240 case ExceptionSpecInstantiation:
5243 case PriorTemplateArgumentSubstitution:
5244 case DefaultTemplateArgumentChecking:
5245 if (X.Template != Y.Template)
5250 case DefaultTemplateArgumentInstantiation:
5251 case ExplicitTemplateArgumentSubstitution:
5252 case DeducedTemplateArgumentSubstitution:
5253 case DefaultFunctionArgumentInstantiation:
5254 return X.TemplateArgs == Y.TemplateArgs;
5258 llvm_unreachable("Invalid InstantiationKind!");
5261 friend bool operator!=(const ActiveTemplateInstantiation &X,
5262 const ActiveTemplateInstantiation &Y) {
5267 /// \brief List of active template instantiations.
5269 /// This vector is treated as a stack. As one template instantiation
5270 /// requires another template instantiation, additional
5271 /// instantiations are pushed onto the stack up to a
5272 /// user-configurable limit LangOptions::InstantiationDepth.
5273 SmallVector<ActiveTemplateInstantiation, 16>
5274 ActiveTemplateInstantiations;
5276 /// \brief Whether we are in a SFINAE context that is not associated with
5277 /// template instantiation.
5279 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside
5280 /// of a template instantiation or template argument deduction.
5281 bool InNonInstantiationSFINAEContext;
5283 /// \brief The number of ActiveTemplateInstantiation entries in
5284 /// \c ActiveTemplateInstantiations that are not actual instantiations and,
5285 /// therefore, should not be counted as part of the instantiation depth.
5286 unsigned NonInstantiationEntries;
5288 /// \brief The last template from which a template instantiation
5289 /// error or warning was produced.
5291 /// This value is used to suppress printing of redundant template
5292 /// instantiation backtraces when there are multiple errors in the
5293 /// same instantiation. FIXME: Does this belong in Sema? It's tough
5294 /// to implement it anywhere else.
5295 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext;
5297 /// \brief The current index into pack expansion arguments that will be
5298 /// used for substitution of parameter packs.
5300 /// The pack expansion index will be -1 to indicate that parameter packs
5301 /// should be instantiated as themselves. Otherwise, the index specifies
5302 /// which argument within the parameter pack will be used for substitution.
5303 int ArgumentPackSubstitutionIndex;
5305 /// \brief RAII object used to change the argument pack substitution index
5306 /// within a \c Sema object.
5308 /// See \c ArgumentPackSubstitutionIndex for more information.
5309 class ArgumentPackSubstitutionIndexRAII {
5311 int OldSubstitutionIndex;
5314 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex)
5315 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) {
5316 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex;
5319 ~ArgumentPackSubstitutionIndexRAII() {
5320 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex;
5324 friend class ArgumentPackSubstitutionRAII;
5326 /// \brief The stack of calls expression undergoing template instantiation.
5328 /// The top of this stack is used by a fixit instantiating unresolved
5329 /// function calls to fix the AST to match the textual change it prints.
5330 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation;
5332 /// \brief For each declaration that involved template argument deduction, the
5333 /// set of diagnostics that were suppressed during that template argument
5336 /// FIXME: Serialize this structure to the AST file.
5337 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >
5338 SuppressedDiagnostics;
5340 /// \brief A stack object to be created when performing template
5343 /// Construction of an object of type \c InstantiatingTemplate
5344 /// pushes the current instantiation onto the stack of active
5345 /// instantiations. If the size of this stack exceeds the maximum
5346 /// number of recursive template instantiations, construction
5347 /// produces an error and evaluates true.
5349 /// Destruction of this object will pop the named instantiation off
5351 struct InstantiatingTemplate {
5352 /// \brief Note that we are instantiating a class template,
5353 /// function template, or a member thereof.
5354 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5356 SourceRange InstantiationRange = SourceRange());
5358 struct ExceptionSpecification {};
5359 /// \brief Note that we are instantiating an exception specification
5360 /// of a function template.
5361 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5362 FunctionDecl *Entity, ExceptionSpecification,
5363 SourceRange InstantiationRange = SourceRange());
5365 /// \brief Note that we are instantiating a default argument in a
5367 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5368 TemplateDecl *Template,
5369 const TemplateArgument *TemplateArgs,
5370 unsigned NumTemplateArgs,
5371 SourceRange InstantiationRange = SourceRange());
5373 /// \brief Note that we are instantiating a default argument in a
5375 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5376 FunctionTemplateDecl *FunctionTemplate,
5377 const TemplateArgument *TemplateArgs,
5378 unsigned NumTemplateArgs,
5379 ActiveTemplateInstantiation::InstantiationKind Kind,
5380 sema::TemplateDeductionInfo &DeductionInfo,
5381 SourceRange InstantiationRange = SourceRange());
5383 /// \brief Note that we are instantiating as part of template
5384 /// argument deduction for a class template partial
5386 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5387 ClassTemplatePartialSpecializationDecl *PartialSpec,
5388 const TemplateArgument *TemplateArgs,
5389 unsigned NumTemplateArgs,
5390 sema::TemplateDeductionInfo &DeductionInfo,
5391 SourceRange InstantiationRange = SourceRange());
5393 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5395 const TemplateArgument *TemplateArgs,
5396 unsigned NumTemplateArgs,
5397 SourceRange InstantiationRange = SourceRange());
5399 /// \brief Note that we are substituting prior template arguments into a
5400 /// non-type or template template parameter.
5401 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5402 NamedDecl *Template,
5403 NonTypeTemplateParmDecl *Param,
5404 const TemplateArgument *TemplateArgs,
5405 unsigned NumTemplateArgs,
5406 SourceRange InstantiationRange);
5408 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5409 NamedDecl *Template,
5410 TemplateTemplateParmDecl *Param,
5411 const TemplateArgument *TemplateArgs,
5412 unsigned NumTemplateArgs,
5413 SourceRange InstantiationRange);
5415 /// \brief Note that we are checking the default template argument
5416 /// against the template parameter for a given template-id.
5417 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5418 TemplateDecl *Template,
5420 const TemplateArgument *TemplateArgs,
5421 unsigned NumTemplateArgs,
5422 SourceRange InstantiationRange);
5425 /// \brief Note that we have finished instantiating this template.
5428 ~InstantiatingTemplate() { Clear(); }
5430 /// \brief Determines whether we have exceeded the maximum
5431 /// recursive template instantiations.
5432 operator bool() const { return Invalid; }
5437 bool SavedInNonInstantiationSFINAEContext;
5438 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation,
5439 SourceRange InstantiationRange);
5441 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented
5443 InstantiatingTemplate&
5444 operator=(const InstantiatingTemplate&); // not implemented
5447 void PrintInstantiationStack();
5449 /// \brief Determines whether we are currently in a context where
5450 /// template argument substitution failures are not considered
5453 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context.
5454 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest
5455 /// template-deduction context object, which can be used to capture
5456 /// diagnostics that will be suppressed.
5457 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
5459 /// \brief RAII class used to determine whether SFINAE has
5460 /// trapped any errors that occur during template argument
5464 unsigned PrevSFINAEErrors;
5465 bool PrevInNonInstantiationSFINAEContext;
5466 bool PrevAccessCheckingSFINAE;
5469 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false)
5470 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors),
5471 PrevInNonInstantiationSFINAEContext(
5472 SemaRef.InNonInstantiationSFINAEContext),
5473 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE)
5475 if (!SemaRef.isSFINAEContext())
5476 SemaRef.InNonInstantiationSFINAEContext = true;
5477 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE;
5481 SemaRef.NumSFINAEErrors = PrevSFINAEErrors;
5482 SemaRef.InNonInstantiationSFINAEContext
5483 = PrevInNonInstantiationSFINAEContext;
5484 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE;
5487 /// \brief Determine whether any SFINAE errors have been trapped.
5488 bool hasErrorOccurred() const {
5489 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors;
5493 /// \brief The current instantiation scope used to store local
5495 LocalInstantiationScope *CurrentInstantiationScope;
5497 /// \brief The number of typos corrected by CorrectTypo.
5498 unsigned TyposCorrected;
5500 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection>
5501 UnqualifiedTyposCorrectedMap;
5503 /// \brief A cache containing the results of typo correction for unqualified
5506 /// The string is the string that we corrected to (which may be empty, if
5507 /// there was no correction), while the boolean will be true when the
5508 /// string represents a keyword.
5509 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected;
5511 /// \brief Worker object for performing CFG-based warnings.
5512 sema::AnalysisBasedWarnings AnalysisWarnings;
5514 /// \brief An entity for which implicit template instantiation is required.
5516 /// The source location associated with the declaration is the first place in
5517 /// the source code where the declaration was "used". It is not necessarily
5518 /// the point of instantiation (which will be either before or after the
5519 /// namespace-scope declaration that triggered this implicit instantiation),
5520 /// However, it is the location that diagnostics should generally refer to,
5521 /// because users will need to know what code triggered the instantiation.
5522 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation;
5524 /// \brief The queue of implicit template instantiations that are required
5525 /// but have not yet been performed.
5526 std::deque<PendingImplicitInstantiation> PendingInstantiations;
5528 /// \brief The queue of implicit template instantiations that are required
5529 /// and must be performed within the current local scope.
5531 /// This queue is only used for member functions of local classes in
5532 /// templates, which must be instantiated in the same scope as their
5533 /// enclosing function, so that they can reference function-local
5534 /// types, static variables, enumerators, etc.
5535 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations;
5537 void PerformPendingInstantiations(bool LocalOnly = false);
5539 TypeSourceInfo *SubstType(TypeSourceInfo *T,
5540 const MultiLevelTemplateArgumentList &TemplateArgs,
5541 SourceLocation Loc, DeclarationName Entity);
5543 QualType SubstType(QualType T,
5544 const MultiLevelTemplateArgumentList &TemplateArgs,
5545 SourceLocation Loc, DeclarationName Entity);
5547 TypeSourceInfo *SubstType(TypeLoc TL,
5548 const MultiLevelTemplateArgumentList &TemplateArgs,
5549 SourceLocation Loc, DeclarationName Entity);
5551 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T,
5552 const MultiLevelTemplateArgumentList &TemplateArgs,
5554 DeclarationName Entity,
5555 CXXRecordDecl *ThisContext,
5556 unsigned ThisTypeQuals);
5557 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D,
5558 const MultiLevelTemplateArgumentList &TemplateArgs,
5559 int indexAdjustment,
5560 llvm::Optional<unsigned> NumExpansions,
5561 bool ExpectParameterPack);
5562 bool SubstParmTypes(SourceLocation Loc,
5563 ParmVarDecl **Params, unsigned NumParams,
5564 const MultiLevelTemplateArgumentList &TemplateArgs,
5565 SmallVectorImpl<QualType> &ParamTypes,
5566 SmallVectorImpl<ParmVarDecl *> *OutParams = 0);
5567 ExprResult SubstExpr(Expr *E,
5568 const MultiLevelTemplateArgumentList &TemplateArgs);
5570 /// \brief Substitute the given template arguments into a list of
5571 /// expressions, expanding pack expansions if required.
5573 /// \param Exprs The list of expressions to substitute into.
5575 /// \param NumExprs The number of expressions in \p Exprs.
5577 /// \param IsCall Whether this is some form of call, in which case
5578 /// default arguments will be dropped.
5580 /// \param TemplateArgs The set of template arguments to substitute.
5582 /// \param Outputs Will receive all of the substituted arguments.
5584 /// \returns true if an error occurred, false otherwise.
5585 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall,
5586 const MultiLevelTemplateArgumentList &TemplateArgs,
5587 SmallVectorImpl<Expr *> &Outputs);
5589 StmtResult SubstStmt(Stmt *S,
5590 const MultiLevelTemplateArgumentList &TemplateArgs);
5592 Decl *SubstDecl(Decl *D, DeclContext *Owner,
5593 const MultiLevelTemplateArgumentList &TemplateArgs);
5595 ExprResult SubstInitializer(Expr *E,
5596 const MultiLevelTemplateArgumentList &TemplateArgs,
5597 bool CXXDirectInit);
5600 SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
5601 CXXRecordDecl *Pattern,
5602 const MultiLevelTemplateArgumentList &TemplateArgs);
5605 InstantiateClass(SourceLocation PointOfInstantiation,
5606 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
5607 const MultiLevelTemplateArgumentList &TemplateArgs,
5608 TemplateSpecializationKind TSK,
5609 bool Complain = true);
5611 bool InstantiateEnum(SourceLocation PointOfInstantiation,
5612 EnumDecl *Instantiation, EnumDecl *Pattern,
5613 const MultiLevelTemplateArgumentList &TemplateArgs,
5614 TemplateSpecializationKind TSK);
5616 struct LateInstantiatedAttribute {
5617 const Attr *TmplAttr;
5618 LocalInstantiationScope *Scope;
5621 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S,
5623 : TmplAttr(A), Scope(S), NewDecl(D)
5626 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec;
5628 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
5629 const Decl *Pattern, Decl *Inst,
5630 LateInstantiatedAttrVec *LateAttrs = 0,
5631 LocalInstantiationScope *OuterMostScope = 0);
5634 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation,
5635 ClassTemplateSpecializationDecl *ClassTemplateSpec,
5636 TemplateSpecializationKind TSK,
5637 bool Complain = true);
5639 void InstantiateClassMembers(SourceLocation PointOfInstantiation,
5640 CXXRecordDecl *Instantiation,
5641 const MultiLevelTemplateArgumentList &TemplateArgs,
5642 TemplateSpecializationKind TSK);
5644 void InstantiateClassTemplateSpecializationMembers(
5645 SourceLocation PointOfInstantiation,
5646 ClassTemplateSpecializationDecl *ClassTemplateSpec,
5647 TemplateSpecializationKind TSK);
5649 NestedNameSpecifierLoc
5650 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
5651 const MultiLevelTemplateArgumentList &TemplateArgs);
5654 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
5655 const MultiLevelTemplateArgumentList &TemplateArgs);
5657 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name,
5659 const MultiLevelTemplateArgumentList &TemplateArgs);
5660 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
5661 TemplateArgumentListInfo &Result,
5662 const MultiLevelTemplateArgumentList &TemplateArgs);
5664 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
5665 FunctionDecl *Function);
5666 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
5667 FunctionDecl *Function,
5668 bool Recursive = false,
5669 bool DefinitionRequired = false);
5670 void InstantiateStaticDataMemberDefinition(
5671 SourceLocation PointOfInstantiation,
5673 bool Recursive = false,
5674 bool DefinitionRequired = false);
5676 void InstantiateMemInitializers(CXXConstructorDecl *New,
5677 const CXXConstructorDecl *Tmpl,
5678 const MultiLevelTemplateArgumentList &TemplateArgs);
5680 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
5681 const MultiLevelTemplateArgumentList &TemplateArgs);
5682 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC,
5683 const MultiLevelTemplateArgumentList &TemplateArgs);
5685 // Objective-C declarations.
5686 enum ObjCContainerKind {
5693 OCK_CategoryImplementation
5695 ObjCContainerKind getObjCContainerKind() const;
5697 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
5698 IdentifierInfo *ClassName,
5699 SourceLocation ClassLoc,
5700 IdentifierInfo *SuperName,
5701 SourceLocation SuperLoc,
5702 Decl * const *ProtoRefs,
5703 unsigned NumProtoRefs,
5704 const SourceLocation *ProtoLocs,
5705 SourceLocation EndProtoLoc,
5706 AttributeList *AttrList);
5708 Decl *ActOnCompatiblityAlias(
5709 SourceLocation AtCompatibilityAliasLoc,
5710 IdentifierInfo *AliasName, SourceLocation AliasLocation,
5711 IdentifierInfo *ClassName, SourceLocation ClassLocation);
5713 bool CheckForwardProtocolDeclarationForCircularDependency(
5714 IdentifierInfo *PName,
5715 SourceLocation &PLoc, SourceLocation PrevLoc,
5716 const ObjCList<ObjCProtocolDecl> &PList);
5718 Decl *ActOnStartProtocolInterface(
5719 SourceLocation AtProtoInterfaceLoc,
5720 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc,
5721 Decl * const *ProtoRefNames, unsigned NumProtoRefs,
5722 const SourceLocation *ProtoLocs,
5723 SourceLocation EndProtoLoc,
5724 AttributeList *AttrList);
5726 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
5727 IdentifierInfo *ClassName,
5728 SourceLocation ClassLoc,
5729 IdentifierInfo *CategoryName,
5730 SourceLocation CategoryLoc,
5731 Decl * const *ProtoRefs,
5732 unsigned NumProtoRefs,
5733 const SourceLocation *ProtoLocs,
5734 SourceLocation EndProtoLoc);
5736 Decl *ActOnStartClassImplementation(
5737 SourceLocation AtClassImplLoc,
5738 IdentifierInfo *ClassName, SourceLocation ClassLoc,
5739 IdentifierInfo *SuperClassname,
5740 SourceLocation SuperClassLoc);
5742 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc,
5743 IdentifierInfo *ClassName,
5744 SourceLocation ClassLoc,
5745 IdentifierInfo *CatName,
5746 SourceLocation CatLoc);
5748 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl,
5749 ArrayRef<Decl *> Decls);
5751 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc,
5752 IdentifierInfo **IdentList,
5753 SourceLocation *IdentLocs,
5756 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc,
5757 const IdentifierLocPair *IdentList,
5759 AttributeList *attrList);
5761 void FindProtocolDeclaration(bool WarnOnDeclarations,
5762 const IdentifierLocPair *ProtocolId,
5763 unsigned NumProtocols,
5764 SmallVectorImpl<Decl *> &Protocols);
5766 /// Ensure attributes are consistent with type.
5767 /// \param [in, out] Attributes The attributes to check; they will
5768 /// be modified to be consistent with \arg PropertyTy.
5769 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy,
5771 unsigned &Attributes);
5773 /// Process the specified property declaration and create decls for the
5774 /// setters and getters as needed.
5775 /// \param property The property declaration being processed
5776 /// \param DC The semantic container for the property
5777 /// \param redeclaredProperty Declaration for property if redeclared
5778 /// in class extension.
5779 /// \param lexicalDC Container for redeclaredProperty.
5780 void ProcessPropertyDecl(ObjCPropertyDecl *property,
5781 ObjCContainerDecl *DC,
5782 ObjCPropertyDecl *redeclaredProperty = 0,
5783 ObjCContainerDecl *lexicalDC = 0);
5785 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
5786 ObjCPropertyDecl *SuperProperty,
5787 const IdentifierInfo *Name);
5788 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl);
5790 void CompareMethodParamsInBaseAndSuper(Decl *IDecl,
5791 ObjCMethodDecl *MethodDecl,
5794 void CompareProperties(Decl *CDecl, Decl *MergeProtocols);
5796 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
5797 ObjCInterfaceDecl *ID);
5799 void MatchOneProtocolPropertiesInClass(Decl *CDecl,
5800 ObjCProtocolDecl *PDecl);
5802 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd,
5803 Decl **allMethods = 0, unsigned allNum = 0,
5804 Decl **allProperties = 0, unsigned pNum = 0,
5805 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0);
5807 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc,
5808 SourceLocation LParenLoc,
5809 FieldDeclarator &FD, ObjCDeclSpec &ODS,
5810 Selector GetterSel, Selector SetterSel,
5811 bool *OverridingProperty,
5812 tok::ObjCKeywordKind MethodImplKind,
5813 DeclContext *lexicalDC = 0);
5815 Decl *ActOnPropertyImplDecl(Scope *S,
5816 SourceLocation AtLoc,
5817 SourceLocation PropertyLoc,
5819 IdentifierInfo *PropertyId,
5820 IdentifierInfo *PropertyIvar,
5821 SourceLocation PropertyIvarLoc);
5823 enum ObjCSpecialMethodKind {
5829 OSMK_NonRetainingInit
5832 struct ObjCArgInfo {
5833 IdentifierInfo *Name;
5834 SourceLocation NameLoc;
5835 // The Type is null if no type was specified, and the DeclSpec is invalid
5838 ObjCDeclSpec DeclSpec;
5840 /// ArgAttrs - Attribute list for this argument.
5841 AttributeList *ArgAttrs;
5844 Decl *ActOnMethodDeclaration(
5846 SourceLocation BeginLoc, // location of the + or -.
5847 SourceLocation EndLoc, // location of the ; or {.
5848 tok::TokenKind MethodType,
5849 ObjCDeclSpec &ReturnQT, ParsedType ReturnType,
5850 ArrayRef<SourceLocation> SelectorLocs, Selector Sel,
5851 // optional arguments. The number of types/arguments is obtained
5852 // from the Sel.getNumArgs().
5853 ObjCArgInfo *ArgInfo,
5854 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args
5855 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind,
5856 bool isVariadic, bool MethodDefinition);
5858 // Helper method for ActOnClassMethod/ActOnInstanceMethod.
5859 // Will search "local" class/category implementations for a method decl.
5860 // Will also search in class's root looking for instance method.
5861 // Returns 0 if no method is found.
5862 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel,
5863 ObjCInterfaceDecl *CDecl);
5864 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel,
5865 ObjCInterfaceDecl *ClassDecl);
5866 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel,
5867 const ObjCObjectPointerType *OPT,
5869 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty,
5872 bool inferObjCARCLifetime(ValueDecl *decl);
5875 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT,
5877 SourceLocation OpLoc,
5878 DeclarationName MemberName,
5879 SourceLocation MemberLoc,
5880 SourceLocation SuperLoc, QualType SuperType,
5884 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName,
5885 IdentifierInfo &propertyName,
5886 SourceLocation receiverNameLoc,
5887 SourceLocation propertyNameLoc);
5889 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc);
5891 /// \brief Describes the kind of message expression indicated by a message
5892 /// send that starts with an identifier.
5893 enum ObjCMessageKind {
5894 /// \brief The message is sent to 'super'.
5896 /// \brief The message is an instance message.
5897 ObjCInstanceMessage,
5898 /// \brief The message is a class message, and the identifier is a type
5903 ObjCMessageKind getObjCMessageKind(Scope *S,
5904 IdentifierInfo *Name,
5905 SourceLocation NameLoc,
5907 bool HasTrailingDot,
5908 ParsedType &ReceiverType);
5910 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc,
5912 SourceLocation LBracLoc,
5913 ArrayRef<SourceLocation> SelectorLocs,
5914 SourceLocation RBracLoc,
5917 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
5918 QualType ReceiverType,
5919 SourceLocation SuperLoc,
5921 ObjCMethodDecl *Method,
5922 SourceLocation LBracLoc,
5923 ArrayRef<SourceLocation> SelectorLocs,
5924 SourceLocation RBracLoc,
5926 bool isImplicit = false);
5928 ExprResult BuildClassMessageImplicit(QualType ReceiverType,
5929 bool isSuperReceiver,
5932 ObjCMethodDecl *Method,
5935 ExprResult ActOnClassMessage(Scope *S,
5936 ParsedType Receiver,
5938 SourceLocation LBracLoc,
5939 ArrayRef<SourceLocation> SelectorLocs,
5940 SourceLocation RBracLoc,
5943 ExprResult BuildInstanceMessage(Expr *Receiver,
5944 QualType ReceiverType,
5945 SourceLocation SuperLoc,
5947 ObjCMethodDecl *Method,
5948 SourceLocation LBracLoc,
5949 ArrayRef<SourceLocation> SelectorLocs,
5950 SourceLocation RBracLoc,
5952 bool isImplicit = false);
5954 ExprResult BuildInstanceMessageImplicit(Expr *Receiver,
5955 QualType ReceiverType,
5958 ObjCMethodDecl *Method,
5961 ExprResult ActOnInstanceMessage(Scope *S,
5964 SourceLocation LBracLoc,
5965 ArrayRef<SourceLocation> SelectorLocs,
5966 SourceLocation RBracLoc,
5969 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc,
5970 ObjCBridgeCastKind Kind,
5971 SourceLocation BridgeKeywordLoc,
5972 TypeSourceInfo *TSInfo,
5975 ExprResult ActOnObjCBridgedCast(Scope *S,
5976 SourceLocation LParenLoc,
5977 ObjCBridgeCastKind Kind,
5978 SourceLocation BridgeKeywordLoc,
5980 SourceLocation RParenLoc,
5983 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
5985 /// \brief Check whether the given new method is a valid override of the
5986 /// given overridden method, and set any properties that should be inherited.
5987 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod,
5988 const ObjCMethodDecl *Overridden,
5989 bool IsImplementation);
5991 /// \brief Check whether the given method overrides any methods in its class,
5992 /// calling \c CheckObjCMethodOverride for each overridden method.
5993 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC);
5995 enum PragmaOptionsAlignKind {
5996 POAK_Native, // #pragma options align=native
5997 POAK_Natural, // #pragma options align=natural
5998 POAK_Packed, // #pragma options align=packed
5999 POAK_Power, // #pragma options align=power
6000 POAK_Mac68k, // #pragma options align=mac68k
6001 POAK_Reset // #pragma options align=reset
6004 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align.
6005 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
6006 SourceLocation PragmaLoc,
6007 SourceLocation KindLoc);
6009 enum PragmaPackKind {
6010 PPK_Default, // #pragma pack([n])
6011 PPK_Show, // #pragma pack(show), only supported by MSVC.
6012 PPK_Push, // #pragma pack(push, [identifier], [n])
6013 PPK_Pop // #pragma pack(pop, [identifier], [n])
6016 enum PragmaMSStructKind {
6017 PMSST_OFF, // #pragms ms_struct off
6018 PMSST_ON // #pragms ms_struct on
6021 /// ActOnPragmaPack - Called on well formed #pragma pack(...).
6022 void ActOnPragmaPack(PragmaPackKind Kind,
6023 IdentifierInfo *Name,
6025 SourceLocation PragmaLoc,
6026 SourceLocation LParenLoc,
6027 SourceLocation RParenLoc);
6029 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off].
6030 void ActOnPragmaMSStruct(PragmaMSStructKind Kind);
6032 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'.
6033 void ActOnPragmaUnused(const Token &Identifier,
6035 SourceLocation PragmaLoc);
6037 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... .
6038 void ActOnPragmaVisibility(const IdentifierInfo* VisType,
6039 SourceLocation PragmaLoc);
6041 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
6042 SourceLocation Loc);
6043 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W);
6045 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident.
6046 void ActOnPragmaWeakID(IdentifierInfo* WeakName,
6047 SourceLocation PragmaLoc,
6048 SourceLocation WeakNameLoc);
6050 /// ActOnPragmaRedefineExtname - Called on well formed
6051 /// #pragma redefine_extname oldname newname.
6052 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName,
6053 IdentifierInfo* AliasName,
6054 SourceLocation PragmaLoc,
6055 SourceLocation WeakNameLoc,
6056 SourceLocation AliasNameLoc);
6058 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident.
6059 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName,
6060 IdentifierInfo* AliasName,
6061 SourceLocation PragmaLoc,
6062 SourceLocation WeakNameLoc,
6063 SourceLocation AliasNameLoc);
6065 /// ActOnPragmaFPContract - Called on well formed
6066 /// #pragma {STDC,OPENCL} FP_CONTRACT
6067 void ActOnPragmaFPContract(tok::OnOffSwitch OOS);
6069 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to
6070 /// a the record decl, to handle '#pragma pack' and '#pragma options align'.
6071 void AddAlignmentAttributesForRecord(RecordDecl *RD);
6073 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record.
6074 void AddMsStructLayoutForRecord(RecordDecl *RD);
6076 /// FreePackedContext - Deallocate and null out PackContext.
6077 void FreePackedContext();
6079 /// PushNamespaceVisibilityAttr - Note that we've entered a
6080 /// namespace with a visibility attribute.
6081 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr,
6082 SourceLocation Loc);
6084 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used,
6085 /// add an appropriate visibility attribute.
6086 void AddPushedVisibilityAttribute(Decl *RD);
6088 /// PopPragmaVisibility - Pop the top element of the visibility stack; used
6089 /// for '#pragma GCC visibility' and visibility attributes on namespaces.
6090 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc);
6092 /// FreeVisContext - Deallocate and null out VisContext.
6093 void FreeVisContext();
6095 /// AddCFAuditedAttribute - Check whether we're currently within
6096 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding
6097 /// the appropriate attribute.
6098 void AddCFAuditedAttribute(Decl *D);
6100 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
6101 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E);
6102 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T);
6104 /// \brief The kind of conversion being performed.
6105 enum CheckedConversionKind {
6106 /// \brief An implicit conversion.
6107 CCK_ImplicitConversion,
6108 /// \brief A C-style cast.
6110 /// \brief A functional-style cast.
6112 /// \brief A cast other than a C-style cast.
6116 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
6117 /// cast. If there is already an implicit cast, merge into the existing one.
6118 /// If isLvalue, the result of the cast is an lvalue.
6119 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK,
6120 ExprValueKind VK = VK_RValue,
6121 const CXXCastPath *BasePath = 0,
6122 CheckedConversionKind CCK
6123 = CCK_ImplicitConversion);
6125 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
6126 /// to the conversion from scalar type ScalarTy to the Boolean type.
6127 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy);
6129 /// IgnoredValueConversions - Given that an expression's result is
6130 /// syntactically ignored, perform any conversions that are
6132 ExprResult IgnoredValueConversions(Expr *E);
6134 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
6135 // functions and arrays to their respective pointers (C99 6.3.2.1).
6136 ExprResult UsualUnaryConversions(Expr *E);
6138 // DefaultFunctionArrayConversion - converts functions and arrays
6139 // to their respective pointers (C99 6.3.2.1).
6140 ExprResult DefaultFunctionArrayConversion(Expr *E);
6142 // DefaultFunctionArrayLvalueConversion - converts functions and
6143 // arrays to their respective pointers and performs the
6144 // lvalue-to-rvalue conversion.
6145 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E);
6147 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on
6148 // the operand. This is DefaultFunctionArrayLvalueConversion,
6149 // except that it assumes the operand isn't of function or array
6151 ExprResult DefaultLvalueConversion(Expr *E);
6153 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that
6154 // do not have a prototype. Integer promotions are performed on each
6155 // argument, and arguments that have type float are promoted to double.
6156 ExprResult DefaultArgumentPromotion(Expr *E);
6158 // Used for emitting the right warning by DefaultVariadicArgumentPromotion
6159 enum VariadicCallType {
6163 VariadicConstructor,
6164 VariadicDoesNotApply
6167 /// GatherArgumentsForCall - Collector argument expressions for various
6168 /// form of call prototypes.
6169 bool GatherArgumentsForCall(SourceLocation CallLoc,
6170 FunctionDecl *FDecl,
6171 const FunctionProtoType *Proto,
6172 unsigned FirstProtoArg,
6173 Expr **Args, unsigned NumArgs,
6174 SmallVector<Expr *, 8> &AllArgs,
6175 VariadicCallType CallType = VariadicDoesNotApply,
6176 bool AllowExplicit = false);
6178 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
6179 // will warn if the resulting type is not a POD type.
6180 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
6181 FunctionDecl *FDecl);
6183 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's
6184 // operands and then handles various conversions that are common to binary
6185 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this
6186 // routine returns the first non-arithmetic type found. The client is
6187 // responsible for emitting appropriate error diagnostics.
6188 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS,
6189 bool IsCompAssign = false);
6191 /// AssignConvertType - All of the 'assignment' semantic checks return this
6192 /// enum to indicate whether the assignment was allowed. These checks are
6193 /// done for simple assignments, as well as initialization, return from
6194 /// function, argument passing, etc. The query is phrased in terms of a
6195 /// source and destination type.
6196 enum AssignConvertType {
6197 /// Compatible - the types are compatible according to the standard.
6200 /// PointerToInt - The assignment converts a pointer to an int, which we
6201 /// accept as an extension.
6204 /// IntToPointer - The assignment converts an int to a pointer, which we
6205 /// accept as an extension.
6208 /// FunctionVoidPointer - The assignment is between a function pointer and
6209 /// void*, which the standard doesn't allow, but we accept as an extension.
6210 FunctionVoidPointer,
6212 /// IncompatiblePointer - The assignment is between two pointers types that
6213 /// are not compatible, but we accept them as an extension.
6214 IncompatiblePointer,
6216 /// IncompatiblePointer - The assignment is between two pointers types which
6217 /// point to integers which have a different sign, but are otherwise
6218 /// identical. This is a subset of the above, but broken out because it's by
6219 /// far the most common case of incompatible pointers.
6220 IncompatiblePointerSign,
6222 /// CompatiblePointerDiscardsQualifiers - The assignment discards
6223 /// c/v/r qualifiers, which we accept as an extension.
6224 CompatiblePointerDiscardsQualifiers,
6226 /// IncompatiblePointerDiscardsQualifiers - The assignment
6227 /// discards qualifiers that we don't permit to be discarded,
6228 /// like address spaces.
6229 IncompatiblePointerDiscardsQualifiers,
6231 /// IncompatibleNestedPointerQualifiers - The assignment is between two
6232 /// nested pointer types, and the qualifiers other than the first two
6233 /// levels differ e.g. char ** -> const char **, but we accept them as an
6235 IncompatibleNestedPointerQualifiers,
6237 /// IncompatibleVectors - The assignment is between two vector types that
6238 /// have the same size, which we accept as an extension.
6239 IncompatibleVectors,
6241 /// IntToBlockPointer - The assignment converts an int to a block
6242 /// pointer. We disallow this.
6245 /// IncompatibleBlockPointer - The assignment is between two block
6246 /// pointers types that are not compatible.
6247 IncompatibleBlockPointer,
6249 /// IncompatibleObjCQualifiedId - The assignment is between a qualified
6250 /// id type and something else (that is incompatible with it). For example,
6251 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol.
6252 IncompatibleObjCQualifiedId,
6254 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an
6255 /// object with __weak qualifier.
6256 IncompatibleObjCWeakRef,
6258 /// Incompatible - We reject this conversion outright, it is invalid to
6259 /// represent it in the AST.
6263 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the
6264 /// assignment conversion type specified by ConvTy. This returns true if the
6265 /// conversion was invalid or false if the conversion was accepted.
6266 bool DiagnoseAssignmentResult(AssignConvertType ConvTy,
6268 QualType DstType, QualType SrcType,
6269 Expr *SrcExpr, AssignmentAction Action,
6270 bool *Complained = 0);
6272 /// CheckAssignmentConstraints - Perform type checking for assignment,
6273 /// argument passing, variable initialization, and function return values.
6275 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc,
6279 /// Check assignment constraints and prepare for a conversion of the
6280 /// RHS to the LHS type.
6281 AssignConvertType CheckAssignmentConstraints(QualType LHSType,
6285 // CheckSingleAssignmentConstraints - Currently used by
6286 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking,
6287 // this routine performs the default function/array converions.
6288 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType,
6290 bool Diagnose = true);
6292 // \brief If the lhs type is a transparent union, check whether we
6293 // can initialize the transparent union with the given expression.
6294 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType,
6297 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType);
6299 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType);
6301 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6302 AssignmentAction Action,
6303 bool AllowExplicit = false);
6304 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6305 AssignmentAction Action,
6307 ImplicitConversionSequence& ICS);
6308 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6309 const ImplicitConversionSequence& ICS,
6310 AssignmentAction Action,
6311 CheckedConversionKind CCK
6312 = CCK_ImplicitConversion);
6313 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6314 const StandardConversionSequence& SCS,
6315 AssignmentAction Action,
6316 CheckedConversionKind CCK);
6318 /// the following "Check" methods will return a valid/converted QualType
6319 /// or a null QualType (indicating an error diagnostic was issued).
6321 /// type checking binary operators (subroutines of CreateBuiltinBinOp).
6322 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS,
6324 QualType CheckPointerToMemberOperands( // C++ 5.5
6325 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK,
6326 SourceLocation OpLoc, bool isIndirect);
6327 QualType CheckMultiplyDivideOperands( // C99 6.5.5
6328 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign,
6330 QualType CheckRemainderOperands( // C99 6.5.5
6331 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6332 bool IsCompAssign = false);
6333 QualType CheckAdditionOperands( // C99 6.5.6
6334 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6335 QualType* CompLHSTy = 0);
6336 QualType CheckSubtractionOperands( // C99 6.5.6
6337 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6338 QualType* CompLHSTy = 0);
6339 QualType CheckShiftOperands( // C99 6.5.7
6340 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6341 bool IsCompAssign = false);
6342 QualType CheckCompareOperands( // C99 6.5.8/9
6343 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc,
6345 QualType CheckBitwiseOperands( // C99 6.5.[10...12]
6346 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6347 bool IsCompAssign = false);
6348 QualType CheckLogicalOperands( // C99 6.5.[13,14]
6349 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc);
6350 // CheckAssignmentOperands is used for both simple and compound assignment.
6351 // For simple assignment, pass both expressions and a null converted type.
6352 // For compound assignment, pass both expressions and the converted type.
6353 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2]
6354 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType);
6356 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc,
6357 UnaryOperatorKind Opcode, Expr *Op);
6358 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc,
6359 BinaryOperatorKind Opcode,
6360 Expr *LHS, Expr *RHS);
6361 ExprResult checkPseudoObjectRValue(Expr *E);
6362 Expr *recreateSyntacticForm(PseudoObjectExpr *E);
6364 QualType CheckConditionalOperands( // C99 6.5.15
6365 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS,
6366 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc);
6367 QualType CXXCheckConditionalOperands( // C++ 5.16
6368 ExprResult &cond, ExprResult &lhs, ExprResult &rhs,
6369 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc);
6370 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2,
6371 bool *NonStandardCompositeType = 0);
6372 QualType FindCompositePointerType(SourceLocation Loc,
6373 ExprResult &E1, ExprResult &E2,
6374 bool *NonStandardCompositeType = 0) {
6375 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take();
6376 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp,
6377 NonStandardCompositeType);
6383 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS,
6384 SourceLocation QuestionLoc);
6386 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr,
6387 SourceLocation QuestionLoc);
6389 /// type checking for vector binary operators.
6390 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
6391 SourceLocation Loc, bool IsCompAssign);
6392 QualType GetSignedVectorType(QualType V);
6393 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS,
6394 SourceLocation Loc, bool isRelational);
6395 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS,
6396 SourceLocation Loc);
6398 /// type checking declaration initializers (C99 6.7.8)
6399 bool CheckForConstantInitializer(Expr *e, QualType t);
6401 // type checking C++ declaration initializers (C++ [dcl.init]).
6403 /// ReferenceCompareResult - Expresses the result of comparing two
6404 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the
6405 /// purposes of initialization by reference (C++ [dcl.init.ref]p4).
6406 enum ReferenceCompareResult {
6407 /// Ref_Incompatible - The two types are incompatible, so direct
6408 /// reference binding is not possible.
6409 Ref_Incompatible = 0,
6410 /// Ref_Related - The two types are reference-related, which means
6411 /// that their unqualified forms (T1 and T2) are either the same
6412 /// or T1 is a base class of T2.
6414 /// Ref_Compatible_With_Added_Qualification - The two types are
6415 /// reference-compatible with added qualification, meaning that
6416 /// they are reference-compatible and the qualifiers on T1 (cv1)
6417 /// are greater than the qualifiers on T2 (cv2).
6418 Ref_Compatible_With_Added_Qualification,
6419 /// Ref_Compatible - The two types are reference-compatible and
6420 /// have equivalent qualifiers (cv1 == cv2).
6424 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc,
6425 QualType T1, QualType T2,
6426 bool &DerivedToBase,
6427 bool &ObjCConversion,
6428 bool &ObjCLifetimeConversion);
6430 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType,
6431 Expr *CastExpr, CastKind &CastKind,
6432 ExprValueKind &VK, CXXCastPath &Path);
6434 /// \brief Force an expression with unknown-type to an expression of the
6436 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType);
6438 // CheckVectorCast - check type constraints for vectors.
6439 // Since vectors are an extension, there are no C standard reference for this.
6440 // We allow casting between vectors and integer datatypes of the same size.
6441 // returns true if the cast is invalid
6442 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty,
6445 // CheckExtVectorCast - check type constraints for extended vectors.
6446 // Since vectors are an extension, there are no C standard reference for this.
6447 // We allow casting between vectors and integer datatypes of the same size,
6448 // or vectors and the element type of that vector.
6449 // returns the cast expr
6450 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr,
6453 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo,
6454 SourceLocation LParenLoc,
6456 SourceLocation RParenLoc);
6458 enum ARCConversionResult { ACR_okay, ACR_unbridged };
6460 /// \brief Checks for invalid conversions and casts between
6461 /// retainable pointers and other pointer kinds.
6462 ARCConversionResult CheckObjCARCConversion(SourceRange castRange,
6463 QualType castType, Expr *&op,
6464 CheckedConversionKind CCK);
6466 Expr *stripARCUnbridgedCast(Expr *e);
6467 void diagnoseARCUnbridgedCast(Expr *e);
6469 bool CheckObjCARCUnavailableWeakConversion(QualType castType,
6472 /// checkRetainCycles - Check whether an Objective-C message send
6473 /// might create an obvious retain cycle.
6474 void checkRetainCycles(ObjCMessageExpr *msg);
6475 void checkRetainCycles(Expr *receiver, Expr *argument);
6477 /// checkUnsafeAssigns - Check whether +1 expr is being assigned
6478 /// to weak/__unsafe_unretained type.
6479 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS);
6481 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned
6482 /// to weak/__unsafe_unretained expression.
6483 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS);
6485 /// CheckMessageArgumentTypes - Check types in an Obj-C message send.
6486 /// \param Method - May be null.
6487 /// \param [out] ReturnType - The return type of the send.
6488 /// \return true iff there were any incompatible types.
6489 bool CheckMessageArgumentTypes(QualType ReceiverType,
6490 Expr **Args, unsigned NumArgs, Selector Sel,
6491 ObjCMethodDecl *Method, bool isClassMessage,
6492 bool isSuperMessage,
6493 SourceLocation lbrac, SourceLocation rbrac,
6494 QualType &ReturnType, ExprValueKind &VK);
6496 /// \brief Determine the result of a message send expression based on
6497 /// the type of the receiver, the method expected to receive the message,
6498 /// and the form of the message send.
6499 QualType getMessageSendResultType(QualType ReceiverType,
6500 ObjCMethodDecl *Method,
6501 bool isClassMessage, bool isSuperMessage);
6503 /// \brief If the given expression involves a message send to a method
6504 /// with a related result type, emit a note describing what happened.
6505 void EmitRelatedResultTypeNote(const Expr *E);
6507 /// CheckBooleanCondition - Diagnose problems involving the use of
6508 /// the given expression as a boolean condition (e.g. in an if
6509 /// statement). Also performs the standard function and array
6510 /// decays, possibly changing the input variable.
6512 /// \param Loc - A location associated with the condition, e.g. the
6514 /// \return true iff there were any errors
6515 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc);
6517 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc,
6520 /// DiagnoseAssignmentAsCondition - Given that an expression is
6521 /// being used as a boolean condition, warn if it's an assignment.
6522 void DiagnoseAssignmentAsCondition(Expr *E);
6524 /// \brief Redundant parentheses over an equality comparison can indicate
6525 /// that the user intended an assignment used as condition.
6526 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE);
6528 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid.
6529 ExprResult CheckCXXBooleanCondition(Expr *CondExpr);
6531 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have
6532 /// the specified width and sign. If an overflow occurs, detect it and emit
6533 /// the specified diagnostic.
6534 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal,
6535 unsigned NewWidth, bool NewSign,
6536 SourceLocation Loc, unsigned DiagID);
6538 /// Checks that the Objective-C declaration is declared in the global scope.
6539 /// Emits an error and marks the declaration as invalid if it's not declared
6540 /// in the global scope.
6541 bool CheckObjCDeclScope(Decl *D);
6543 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE,
6544 /// and reports the appropriate diagnostics. Returns false on success.
6545 /// Can optionally return the value of the expression.
6546 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6547 const PartialDiagnostic &Diag,
6549 const PartialDiagnostic &FoldDiag);
6550 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6551 const PartialDiagnostic &Diag,
6552 bool AllowFold = true) {
6553 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold,
6556 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0);
6558 /// VerifyBitField - verifies that a bit field expression is an ICE and has
6559 /// the correct width, and that the field type is valid.
6560 /// Returns false on success.
6561 /// Can optionally return whether the bit-field is of width 0
6562 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName,
6563 QualType FieldTy, Expr *BitWidth,
6564 bool *ZeroWidth = 0);
6566 enum CUDAFunctionTarget {
6573 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D);
6575 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget,
6576 CUDAFunctionTarget CalleeTarget);
6578 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) {
6579 return CheckCUDATarget(IdentifyCUDATarget(Caller),
6580 IdentifyCUDATarget(Callee));
6583 /// \name Code completion
6585 /// \brief Describes the context in which code completion occurs.
6586 enum ParserCompletionContext {
6587 /// \brief Code completion occurs at top-level or namespace context.
6589 /// \brief Code completion occurs within a class, struct, or union.
6591 /// \brief Code completion occurs within an Objective-C interface, protocol,
6594 /// \brief Code completion occurs within an Objective-C implementation or
6595 /// category implementation
6596 PCC_ObjCImplementation,
6597 /// \brief Code completion occurs within the list of instance variables
6598 /// in an Objective-C interface, protocol, category, or implementation.
6599 PCC_ObjCInstanceVariableList,
6600 /// \brief Code completion occurs following one or more template
6603 /// \brief Code completion occurs following one or more template
6604 /// headers within a class.
6606 /// \brief Code completion occurs within an expression.
6608 /// \brief Code completion occurs within a statement, which may
6609 /// also be an expression or a declaration.
6611 /// \brief Code completion occurs at the beginning of the
6612 /// initialization statement (or expression) in a for loop.
6614 /// \brief Code completion occurs within the condition of an if,
6615 /// while, switch, or for statement.
6617 /// \brief Code completion occurs within the body of a function on a
6618 /// recovery path, where we do not have a specific handle on our position
6620 PCC_RecoveryInFunction,
6621 /// \brief Code completion occurs where only a type is permitted.
6623 /// \brief Code completion occurs in a parenthesized expression, which
6624 /// might also be a type cast.
6625 PCC_ParenthesizedExpression,
6626 /// \brief Code completion occurs within a sequence of declaration
6627 /// specifiers within a function, method, or block.
6628 PCC_LocalDeclarationSpecifiers
6631 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path);
6632 void CodeCompleteOrdinaryName(Scope *S,
6633 ParserCompletionContext CompletionContext);
6634 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS,
6635 bool AllowNonIdentifiers,
6636 bool AllowNestedNameSpecifiers);
6638 struct CodeCompleteExpressionData;
6639 void CodeCompleteExpression(Scope *S,
6640 const CodeCompleteExpressionData &Data);
6641 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base,
6642 SourceLocation OpLoc,
6644 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS);
6645 void CodeCompleteTag(Scope *S, unsigned TagSpec);
6646 void CodeCompleteTypeQualifiers(DeclSpec &DS);
6647 void CodeCompleteCase(Scope *S);
6648 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args);
6649 void CodeCompleteInitializer(Scope *S, Decl *D);
6650 void CodeCompleteReturn(Scope *S);
6651 void CodeCompleteAfterIf(Scope *S);
6652 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS);
6654 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS,
6655 bool EnteringContext);
6656 void CodeCompleteUsing(Scope *S);
6657 void CodeCompleteUsingDirective(Scope *S);
6658 void CodeCompleteNamespaceDecl(Scope *S);
6659 void CodeCompleteNamespaceAliasDecl(Scope *S);
6660 void CodeCompleteOperatorName(Scope *S);
6661 void CodeCompleteConstructorInitializer(Decl *Constructor,
6662 CXXCtorInitializer** Initializers,
6663 unsigned NumInitializers);
6664 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro,
6665 bool AfterAmpersand);
6667 void CodeCompleteObjCAtDirective(Scope *S);
6668 void CodeCompleteObjCAtVisibility(Scope *S);
6669 void CodeCompleteObjCAtStatement(Scope *S);
6670 void CodeCompleteObjCAtExpression(Scope *S);
6671 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS);
6672 void CodeCompleteObjCPropertyGetter(Scope *S);
6673 void CodeCompleteObjCPropertySetter(Scope *S);
6674 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
6676 void CodeCompleteObjCMessageReceiver(Scope *S);
6677 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc,
6678 IdentifierInfo **SelIdents,
6679 unsigned NumSelIdents,
6680 bool AtArgumentExpression);
6681 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver,
6682 IdentifierInfo **SelIdents,
6683 unsigned NumSelIdents,
6684 bool AtArgumentExpression,
6685 bool IsSuper = false);
6686 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver,
6687 IdentifierInfo **SelIdents,
6688 unsigned NumSelIdents,
6689 bool AtArgumentExpression,
6690 ObjCInterfaceDecl *Super = 0);
6691 void CodeCompleteObjCForCollection(Scope *S,
6692 DeclGroupPtrTy IterationVar);
6693 void CodeCompleteObjCSelector(Scope *S,
6694 IdentifierInfo **SelIdents,
6695 unsigned NumSelIdents);
6696 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols,
6697 unsigned NumProtocols);
6698 void CodeCompleteObjCProtocolDecl(Scope *S);
6699 void CodeCompleteObjCInterfaceDecl(Scope *S);
6700 void CodeCompleteObjCSuperclass(Scope *S,
6701 IdentifierInfo *ClassName,
6702 SourceLocation ClassNameLoc);
6703 void CodeCompleteObjCImplementationDecl(Scope *S);
6704 void CodeCompleteObjCInterfaceCategory(Scope *S,
6705 IdentifierInfo *ClassName,
6706 SourceLocation ClassNameLoc);
6707 void CodeCompleteObjCImplementationCategory(Scope *S,
6708 IdentifierInfo *ClassName,
6709 SourceLocation ClassNameLoc);
6710 void CodeCompleteObjCPropertyDefinition(Scope *S);
6711 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S,
6712 IdentifierInfo *PropertyName);
6713 void CodeCompleteObjCMethodDecl(Scope *S,
6714 bool IsInstanceMethod,
6715 ParsedType ReturnType);
6716 void CodeCompleteObjCMethodDeclSelector(Scope *S,
6717 bool IsInstanceMethod,
6718 bool AtParameterName,
6719 ParsedType ReturnType,
6720 IdentifierInfo **SelIdents,
6721 unsigned NumSelIdents);
6722 void CodeCompletePreprocessorDirective(bool InConditional);
6723 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S);
6724 void CodeCompletePreprocessorMacroName(bool IsDefinition);
6725 void CodeCompletePreprocessorExpression();
6726 void CodeCompletePreprocessorMacroArgument(Scope *S,
6727 IdentifierInfo *Macro,
6728 MacroInfo *MacroInfo,
6730 void CodeCompleteNaturalLanguage();
6731 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator,
6732 CodeCompletionTUInfo &CCTUInfo,
6733 SmallVectorImpl<CodeCompletionResult> &Results);
6736 //===--------------------------------------------------------------------===//
6737 // Extra semantic analysis beyond the C type system
6740 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL,
6741 unsigned ByteNo) const;
6744 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
6745 const ArraySubscriptExpr *ASE=0,
6746 bool AllowOnePastEnd=true, bool IndexNegated=false);
6747 void CheckArrayAccess(const Expr *E);
6748 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall);
6749 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc,
6750 Expr **Args, unsigned NumArgs);
6751 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall);
6753 bool CheckObjCString(Expr *Arg);
6755 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
6756 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
6758 bool SemaBuiltinVAStart(CallExpr *TheCall);
6759 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
6760 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs);
6763 // Used by C++ template instantiation.
6764 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall);
6767 bool SemaBuiltinPrefetch(CallExpr *TheCall);
6768 bool SemaBuiltinObjectSize(CallExpr *TheCall);
6769 bool SemaBuiltinLongjmp(CallExpr *TheCall);
6770 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult);
6771 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult,
6772 AtomicExpr::AtomicOp Op);
6773 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
6774 llvm::APSInt &Result);
6776 enum FormatStringType {
6785 static FormatStringType GetFormatStringType(const FormatAttr *Format);
6786 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs,
6787 bool HasVAListArg, unsigned format_idx,
6788 unsigned firstDataArg, FormatStringType Type,
6789 bool inFunctionCall = true);
6791 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr,
6792 Expr **Args, unsigned NumArgs, bool HasVAListArg,
6793 unsigned format_idx, unsigned firstDataArg,
6794 FormatStringType Type, bool inFunctionCall);
6796 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall);
6797 void CheckFormatArguments(const FormatAttr *Format, Expr **Args,
6798 unsigned NumArgs, bool IsCXXMember,
6799 SourceLocation Loc, SourceRange Range);
6800 void CheckFormatArguments(Expr **Args, unsigned NumArgs,
6801 bool HasVAListArg, unsigned format_idx,
6802 unsigned firstDataArg, FormatStringType Type,
6803 SourceLocation Loc, SourceRange range);
6805 void CheckNonNullArguments(const NonNullAttr *NonNull,
6806 const Expr * const *ExprArgs,
6807 SourceLocation CallSiteLoc);
6809 void CheckMemaccessArguments(const CallExpr *Call,
6811 IdentifierInfo *FnName);
6813 void CheckStrlcpycatArguments(const CallExpr *Call,
6814 IdentifierInfo *FnName);
6816 void CheckStrncatArguments(const CallExpr *Call,
6817 IdentifierInfo *FnName);
6819 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType,
6820 SourceLocation ReturnLoc);
6821 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS);
6822 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation());
6824 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field,
6827 /// \brief The parser's current scope.
6829 /// The parser maintains this state here.
6833 friend class Parser;
6834 friend class InitializationSequence;
6835 friend class ASTReader;
6836 friend class ASTWriter;
6839 /// \brief Retrieve the parser's current scope.
6841 /// This routine must only be used when it is certain that semantic analysis
6842 /// and the parser are in precisely the same context, which is not the case
6843 /// when, e.g., we are performing any kind of template instantiation.
6844 /// Therefore, the only safe places to use this scope are in the parser
6845 /// itself and in routines directly invoked from the parser and *never* from
6846 /// template substitution or instantiation.
6847 Scope *getCurScope() const { return CurScope; }
6849 Decl *getObjCDeclContext() const;
6851 DeclContext *getCurLexicalContext() const {
6852 return OriginalLexicalContext ? OriginalLexicalContext : CurContext;
6855 AvailabilityResult getCurContextAvailability() const;
6858 /// \brief RAII object that enters a new expression evaluation context.
6859 class EnterExpressionEvaluationContext {
6863 EnterExpressionEvaluationContext(Sema &Actions,
6864 Sema::ExpressionEvaluationContext NewContext,
6865 Decl *LambdaContextDecl = 0,
6866 bool IsDecltype = false)
6867 : Actions(Actions) {
6868 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl,
6872 ~EnterExpressionEvaluationContext() {
6873 Actions.PopExpressionEvaluationContext();
6877 } // end namespace clang