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 overriding destructors seen during a class definition
335 /// (there could be multiple due to nested classes) that had their exception
336 /// spec checks delayed, plus the overridden destructor.
337 SmallVector<std::pair<const CXXDestructorDecl*,
338 const CXXDestructorDecl*>, 2>
339 DelayedDestructorExceptionSpecChecks;
341 /// \brief Callback to the parser to parse templated functions when needed.
342 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD);
343 LateTemplateParserCB *LateTemplateParser;
346 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) {
347 LateTemplateParser = LTP;
351 class DelayedDiagnostics;
353 class ParsingDeclState {
354 unsigned SavedStackSize;
355 friend class Sema::DelayedDiagnostics;
358 class ProcessingContextState {
359 unsigned SavedParsingDepth;
360 unsigned SavedActiveStackBase;
361 friend class Sema::DelayedDiagnostics;
364 /// A class which encapsulates the logic for delaying diagnostics
365 /// during parsing and other processing.
366 class DelayedDiagnostics {
367 /// \brief The stack of diagnostics that were delayed due to being
368 /// produced during the parsing of a declaration.
369 sema::DelayedDiagnostic *Stack;
371 /// \brief The number of objects on the delayed-diagnostics stack.
374 /// \brief The current capacity of the delayed-diagnostics stack.
375 unsigned StackCapacity;
377 /// \brief The index of the first "active" delayed diagnostic in
378 /// the stack. When parsing class definitions, we ignore active
379 /// delayed diagnostics from the surrounding context.
380 unsigned ActiveStackBase;
382 /// \brief The depth of the declarations we're currently parsing.
383 /// This gets saved and reset whenever we enter a class definition.
384 unsigned ParsingDepth;
387 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0),
388 ActiveStackBase(0), ParsingDepth(0) {}
390 ~DelayedDiagnostics() {
391 delete[] reinterpret_cast<char*>(Stack);
394 /// Adds a delayed diagnostic.
395 void add(const sema::DelayedDiagnostic &diag);
397 /// Determines whether diagnostics should be delayed.
398 bool shouldDelayDiagnostics() { return ParsingDepth > 0; }
400 /// Observe that we've started parsing a declaration. Access and
401 /// deprecation diagnostics will be delayed; when the declaration
402 /// is completed, all active delayed diagnostics will be evaluated
403 /// in its context, and then active diagnostics stack will be
404 /// popped down to the saved depth.
405 ParsingDeclState pushParsingDecl() {
408 ParsingDeclState state;
409 state.SavedStackSize = StackSize;
413 /// Observe that we're completed parsing a declaration.
414 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl);
416 /// Observe that we've started processing a different context, the
417 /// contents of which are semantically separate from the
418 /// declarations it may lexically appear in. This sets aside the
419 /// current stack of active diagnostics and starts afresh.
420 ProcessingContextState pushContext() {
421 assert(StackSize >= ActiveStackBase);
423 ProcessingContextState state;
424 state.SavedParsingDepth = ParsingDepth;
425 state.SavedActiveStackBase = ActiveStackBase;
427 ActiveStackBase = StackSize;
433 /// Observe that we've stopped processing a context. This
434 /// restores the previous stack of active diagnostics.
435 void popContext(ProcessingContextState state) {
436 assert(ActiveStackBase == StackSize);
437 assert(ParsingDepth == 0);
438 ActiveStackBase = state.SavedActiveStackBase;
439 ParsingDepth = state.SavedParsingDepth;
441 } DelayedDiagnostics;
443 /// A RAII object to temporarily push a declaration context.
447 DeclContext *SavedContext;
448 ProcessingContextState SavedContextState;
449 QualType SavedCXXThisTypeOverride;
452 ContextRAII(Sema &S, DeclContext *ContextToPush)
453 : S(S), SavedContext(S.CurContext),
454 SavedContextState(S.DelayedDiagnostics.pushContext()),
455 SavedCXXThisTypeOverride(S.CXXThisTypeOverride)
457 assert(ContextToPush && "pushing null context");
458 S.CurContext = ContextToPush;
462 if (!SavedContext) return;
463 S.CurContext = SavedContext;
464 S.DelayedDiagnostics.popContext(SavedContextState);
465 S.CXXThisTypeOverride = SavedCXXThisTypeOverride;
474 /// WeakUndeclaredIdentifiers - Identifiers contained in
475 /// #pragma weak before declared. rare. may alias another
476 /// identifier, declared or undeclared
477 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers;
479 /// ExtnameUndeclaredIdentifiers - Identifiers contained in
480 /// #pragma redefine_extname before declared. Used in Solaris system headers
481 /// to define functions that occur in multiple standards to call the version
482 /// in the currently selected standard.
483 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers;
486 /// \brief Load weak undeclared identifiers from the external source.
487 void LoadExternalWeakUndeclaredIdentifiers();
489 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by
490 /// #pragma weak during processing of other Decls.
491 /// I couldn't figure out a clean way to generate these in-line, so
492 /// we store them here and handle separately -- which is a hack.
493 /// It would be best to refactor this.
494 SmallVector<Decl*,2> WeakTopLevelDecl;
496 IdentifierResolver IdResolver;
498 /// Translation Unit Scope - useful to Objective-C actions that need
499 /// to lookup file scope declarations in the "ordinary" C decl namespace.
500 /// For example, user-defined classes, built-in "id" type, etc.
503 /// \brief The C++ "std" namespace, where the standard library resides.
504 LazyDeclPtr StdNamespace;
506 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++
507 /// standard library.
508 LazyDeclPtr StdBadAlloc;
510 /// \brief The C++ "std::initializer_list" template, which is defined in
511 /// <initializer_list>.
512 ClassTemplateDecl *StdInitializerList;
514 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>.
515 RecordDecl *CXXTypeInfoDecl;
517 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files.
518 RecordDecl *MSVCGuidDecl;
520 /// \brief Caches identifiers/selectors for NSFoundation APIs.
521 llvm::OwningPtr<NSAPI> NSAPIObj;
523 /// \brief The declaration of the Objective-C NSNumber class.
524 ObjCInterfaceDecl *NSNumberDecl;
526 /// \brief The Objective-C NSNumber methods used to create NSNumber literals.
527 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods];
529 /// \brief The declaration of the Objective-C NSArray class.
530 ObjCInterfaceDecl *NSArrayDecl;
532 /// \brief The declaration of the arrayWithObjects:count: method.
533 ObjCMethodDecl *ArrayWithObjectsMethod;
535 /// \brief The declaration of the Objective-C NSDictionary class.
536 ObjCInterfaceDecl *NSDictionaryDecl;
538 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method.
539 ObjCMethodDecl *DictionaryWithObjectsMethod;
541 /// \brief id<NSCopying> type.
542 QualType QIDNSCopying;
544 /// A flag to remember whether the implicit forms of operator new and delete
545 /// have been declared.
546 bool GlobalNewDeleteDeclared;
548 /// A flag that is set when parsing a -dealloc method and no [super dealloc]
549 /// call was found yet.
550 bool ObjCShouldCallSuperDealloc;
551 /// A flag that is set when parsing a -finalize method and no [super finalize]
552 /// call was found yet.
553 bool ObjCShouldCallSuperFinalize;
555 /// \brief Describes how the expressions currently being parsed are
556 /// evaluated at run-time, if at all.
557 enum ExpressionEvaluationContext {
558 /// \brief The current expression and its subexpressions occur within an
559 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of
560 /// \c sizeof, where the type of the expression may be significant but
561 /// no code will be generated to evaluate the value of the expression at
565 /// \brief The current context is "potentially evaluated" in C++11 terms,
566 /// but the expression is evaluated at compile-time (like the values of
567 /// cases in a switch statment).
570 /// \brief The current expression is potentially evaluated at run time,
571 /// which means that code may be generated to evaluate the value of the
572 /// expression at run time.
573 PotentiallyEvaluated,
575 /// \brief The current expression is potentially evaluated, but any
576 /// declarations referenced inside that expression are only used if
577 /// in fact the current expression is used.
579 /// This value is used when parsing default function arguments, for which
580 /// we would like to provide diagnostics (e.g., passing non-POD arguments
581 /// through varargs) but do not want to mark declarations as "referenced"
582 /// until the default argument is used.
583 PotentiallyEvaluatedIfUsed
586 /// \brief Data structure used to record current or nested
587 /// expression evaluation contexts.
588 struct ExpressionEvaluationContextRecord {
589 /// \brief The expression evaluation context.
590 ExpressionEvaluationContext Context;
592 /// \brief Whether the enclosing context needed a cleanup.
593 bool ParentNeedsCleanups;
595 /// \brief Whether we are in a decltype expression.
598 /// \brief The number of active cleanup objects when we entered
599 /// this expression evaluation context.
600 unsigned NumCleanupObjects;
602 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs;
604 /// \brief The lambdas that are present within this context, if it
605 /// is indeed an unevaluated context.
606 llvm::SmallVector<LambdaExpr *, 2> Lambdas;
608 /// \brief The declaration that provides context for the lambda expression
609 /// if the normal declaration context does not suffice, e.g., in a
610 /// default function argument.
611 Decl *LambdaContextDecl;
613 /// \brief The context information used to mangle lambda expressions
614 /// within this context.
616 /// This mangling information is allocated lazily, since most contexts
617 /// do not have lambda expressions.
618 LambdaMangleContext *LambdaMangle;
620 /// \brief If we are processing a decltype type, a set of call expressions
621 /// for which we have deferred checking the completeness of the return type.
622 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls;
624 /// \brief If we are processing a decltype type, a set of temporary binding
625 /// expressions for which we have deferred checking the destructor.
626 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds;
628 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
629 unsigned NumCleanupObjects,
630 bool ParentNeedsCleanups,
631 Decl *LambdaContextDecl,
633 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups),
634 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
635 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { }
637 ~ExpressionEvaluationContextRecord() {
641 /// \brief Retrieve the mangling context for lambdas.
642 LambdaMangleContext &getLambdaMangleContext() {
643 assert(LambdaContextDecl && "Need to have a lambda context declaration");
645 LambdaMangle = new LambdaMangleContext;
646 return *LambdaMangle;
650 /// A stack of expression evaluation contexts.
651 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts;
653 /// SpecialMemberOverloadResult - The overloading result for a special member
656 /// This is basically a wrapper around PointerIntPair. The lowest bit of the
657 /// integer is used to determine whether we have a parameter qualification
658 /// match, the second-lowest is whether we had success in resolving the
659 /// overload to a unique non-deleted function.
661 /// The ConstParamMatch bit represents whether, when looking up a copy
662 /// constructor or assignment operator, we found a potential copy
663 /// constructor/assignment operator whose first parameter is const-qualified.
664 /// This is used for determining parameter types of other objects and is
665 /// utterly meaningless on other types of special members.
666 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode {
676 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair;
679 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID)
680 : FastFoldingSetNode(ID)
683 CXXMethodDecl *getMethod() const { return Pair.getPointer(); }
684 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); }
686 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); }
687 void setKind(Kind K) { Pair.setInt(K); }
689 bool hasSuccess() const { return getKind() >= SuccessNonConst; }
690 bool hasConstParamMatch() const { return getKind() == SuccessConst; }
693 /// \brief A cache of special member function overload resolution results
695 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache;
697 /// \brief The kind of translation unit we are processing.
699 /// When we're processing a complete translation unit, Sema will perform
700 /// end-of-translation-unit semantic tasks (such as creating
701 /// initializers for tentative definitions in C) once parsing has
702 /// completed. Modules and precompiled headers perform different kinds of
704 TranslationUnitKind TUKind;
706 llvm::BumpPtrAllocator BumpAlloc;
708 /// \brief The number of SFINAE diagnostics that have been trapped.
709 unsigned NumSFINAEErrors;
711 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> >
712 UnparsedDefaultArgInstantiationsMap;
714 /// \brief A mapping from parameters with unparsed default arguments to the
715 /// set of instantiations of each parameter.
717 /// This mapping is a temporary data structure used when parsing
718 /// nested class templates or nested classes of class templates,
719 /// where we might end up instantiating an inner class before the
720 /// default arguments of its methods have been parsed.
721 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations;
723 // Contains the locations of the beginning of unparsed default
724 // argument locations.
725 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs;
727 /// UndefinedInternals - all the used, undefined objects with
728 /// internal linkage in this translation unit.
729 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals;
731 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
732 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
734 /// Method Pool - allows efficient lookup when typechecking messages to "id".
735 /// We need to maintain a list, since selectors can have differing signatures
736 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1%
737 /// of selectors are "overloaded").
738 GlobalMethodPool MethodPool;
740 /// Method selectors used in a @selector expression. Used for implementation
742 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors;
744 void ReadMethodPool(Selector Sel);
746 /// Private Helper predicate to check for 'self'.
747 bool isSelfExpr(Expr *RExpr);
749 /// \brief Cause the active diagnostic on the DiagosticsEngine to be
750 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and
751 /// should not be used elsewhere.
752 void EmitCurrentDiagnostic(unsigned DiagID);
755 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
756 TranslationUnitKind TUKind = TU_Complete,
757 CodeCompleteConsumer *CompletionConsumer = 0);
760 /// \brief Perform initialization that occurs after the parser has been
761 /// initialized but before it parses anything.
764 const LangOptions &getLangOpts() const { return LangOpts; }
765 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; }
766 FPOptions &getFPOptions() { return FPFeatures; }
768 DiagnosticsEngine &getDiagnostics() const { return Diags; }
769 SourceManager &getSourceManager() const { return SourceMgr; }
770 const TargetAttributesSema &getTargetAttributesSema() const;
771 Preprocessor &getPreprocessor() const { return PP; }
772 ASTContext &getASTContext() const { return Context; }
773 ASTConsumer &getASTConsumer() const { return Consumer; }
774 ASTMutationListener *getASTMutationListener() const;
776 void PrintStats() const;
778 /// \brief Helper class that creates diagnostics with optional
779 /// template instantiation stacks.
781 /// This class provides a wrapper around the basic DiagnosticBuilder
782 /// class that emits diagnostics. SemaDiagnosticBuilder is
783 /// responsible for emitting the diagnostic (as DiagnosticBuilder
784 /// does) and, if the diagnostic comes from inside a template
785 /// instantiation, printing the template instantiation stack as
787 class SemaDiagnosticBuilder : public DiagnosticBuilder {
792 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID)
793 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { }
795 ~SemaDiagnosticBuilder() {
796 // If we aren't active, there is nothing to do.
797 if (!isActive()) return;
799 // Otherwise, we need to emit the diagnostic. First flush the underlying
800 // DiagnosticBuilder data, and clear the diagnostic builder itself so it
801 // won't emit the diagnostic in its own destructor.
803 // This seems wasteful, in that as written the DiagnosticBuilder dtor will
804 // do its own needless checks to see if the diagnostic needs to be
805 // emitted. However, because we take care to ensure that the builder
806 // objects never escape, a sufficiently smart compiler will be able to
807 // eliminate that code.
811 // Dispatch to Sema to emit the diagnostic.
812 SemaRef.EmitCurrentDiagnostic(DiagID);
816 /// \brief Emit a diagnostic.
817 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
818 DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
819 return SemaDiagnosticBuilder(DB, *this, DiagID);
822 /// \brief Emit a partial diagnostic.
823 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD);
825 /// \brief Build a partial diagnostic.
826 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h
828 bool findMacroSpelling(SourceLocation &loc, StringRef name);
830 /// \brief Get a string to suggest for zero-initialization of a type.
831 const char *getFixItZeroInitializerForType(QualType T) const;
833 ExprResult Owned(Expr* E) { return E; }
834 ExprResult Owned(ExprResult R) { return R; }
835 StmtResult Owned(Stmt* S) { return S; }
837 void ActOnEndOfTranslationUnit();
839 void CheckDelegatingCtorCycles();
841 Scope *getScopeForContext(DeclContext *Ctx);
843 void PushFunctionScope();
844 void PushBlockScope(Scope *BlockScope, BlockDecl *Block);
845 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator);
846 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0,
847 const Decl *D = 0, const BlockExpr *blkExpr = 0);
849 sema::FunctionScopeInfo *getCurFunction() const {
850 return FunctionScopes.back();
853 void PushCompoundScope();
854 void PopCompoundScope();
856 sema::CompoundScopeInfo &getCurCompoundScope() const;
858 bool hasAnyUnrecoverableErrorsInThisFunction() const;
860 /// \brief Retrieve the current block, if any.
861 sema::BlockScopeInfo *getCurBlock();
863 /// \brief Retrieve the current lambda expression, if any.
864 sema::LambdaScopeInfo *getCurLambda();
866 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls
867 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; }
869 //===--------------------------------------------------------------------===//
870 // Type Analysis / Processing: SemaType.cpp.
873 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs);
874 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) {
875 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR));
877 QualType BuildPointerType(QualType T,
878 SourceLocation Loc, DeclarationName Entity);
879 QualType BuildReferenceType(QualType T, bool LValueRef,
880 SourceLocation Loc, DeclarationName Entity);
881 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
882 Expr *ArraySize, unsigned Quals,
883 SourceRange Brackets, DeclarationName Entity);
884 QualType BuildExtVectorType(QualType T, Expr *ArraySize,
885 SourceLocation AttrLoc);
886 QualType BuildFunctionType(QualType T,
887 QualType *ParamTypes, unsigned NumParamTypes,
888 bool Variadic, bool HasTrailingReturn,
889 unsigned Quals, RefQualifierKind RefQualifier,
890 SourceLocation Loc, DeclarationName Entity,
891 FunctionType::ExtInfo Info);
892 QualType BuildMemberPointerType(QualType T, QualType Class,
894 DeclarationName Entity);
895 QualType BuildBlockPointerType(QualType T,
896 SourceLocation Loc, DeclarationName Entity);
897 QualType BuildParenType(QualType T);
898 QualType BuildAtomicType(QualType T, SourceLocation Loc);
900 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S);
901 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy);
902 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
903 TypeSourceInfo *ReturnTypeInfo);
905 /// \brief Package the given type and TSI into a ParsedType.
906 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo);
907 DeclarationNameInfo GetNameForDeclarator(Declarator &D);
908 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name);
909 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0);
910 CanThrowResult canThrow(const Expr *E);
911 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
912 const FunctionProtoType *FPT);
913 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range);
914 bool CheckDistantExceptionSpec(QualType T);
915 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
916 bool CheckEquivalentExceptionSpec(
917 const FunctionProtoType *Old, SourceLocation OldLoc,
918 const FunctionProtoType *New, SourceLocation NewLoc);
919 bool CheckEquivalentExceptionSpec(
920 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
921 const FunctionProtoType *Old, SourceLocation OldLoc,
922 const FunctionProtoType *New, SourceLocation NewLoc,
923 bool *MissingExceptionSpecification = 0,
924 bool *MissingEmptyExceptionSpecification = 0,
925 bool AllowNoexceptAllMatchWithNoSpec = false,
926 bool IsOperatorNew = false);
927 bool CheckExceptionSpecSubset(
928 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
929 const FunctionProtoType *Superset, SourceLocation SuperLoc,
930 const FunctionProtoType *Subset, SourceLocation SubLoc);
931 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID,
932 const FunctionProtoType *Target, SourceLocation TargetLoc,
933 const FunctionProtoType *Source, SourceLocation SourceLoc);
935 TypeResult ActOnTypeName(Scope *S, Declarator &D);
937 /// \brief The parser has parsed the context-sensitive type 'instancetype'
938 /// in an Objective-C message declaration. Return the appropriate type.
939 ParsedType ActOnObjCInstanceType(SourceLocation Loc);
941 bool RequireCompleteType(SourceLocation Loc, QualType T,
942 const PartialDiagnostic &PD,
943 std::pair<SourceLocation, PartialDiagnostic> Note);
944 bool RequireCompleteType(SourceLocation Loc, QualType T,
945 const PartialDiagnostic &PD);
946 bool RequireCompleteType(SourceLocation Loc, QualType T,
948 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD,
949 std::pair<SourceLocation,
950 PartialDiagnostic> Note);
952 bool RequireLiteralType(SourceLocation Loc, QualType T,
953 const PartialDiagnostic &PD);
955 QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
956 const CXXScopeSpec &SS, QualType T);
958 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc);
959 QualType BuildDecltypeType(Expr *E, SourceLocation Loc);
960 QualType BuildUnaryTransformType(QualType BaseType,
961 UnaryTransformType::UTTKind UKind,
964 //===--------------------------------------------------------------------===//
965 // Symbol table / Decl tracking callbacks: SemaDecl.cpp.
968 /// List of decls defined in a function prototype. This contains EnumConstants
969 /// that incorrectly end up in translation unit scope because there is no
970 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches
971 /// them into the FunctionDecl.
972 std::vector<NamedDecl*> DeclsInPrototypeScope;
973 /// Nonzero if we are currently parsing a function declarator. This is a counter
974 /// as opposed to a boolean so we can deal with nested function declarators
976 /// void f(void (*g)(), ...)
977 unsigned InFunctionDeclarator;
979 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0);
981 void DiagnoseUseOfUnimplementedSelectors();
983 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc,
984 Scope *S, CXXScopeSpec *SS = 0,
985 bool isClassName = false,
986 bool HasTrailingDot = false,
987 ParsedType ObjectType = ParsedType(),
988 bool IsCtorOrDtorName = false,
989 bool WantNontrivialTypeSourceInfo = false,
990 IdentifierInfo **CorrectedII = 0);
991 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S);
992 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S);
993 bool DiagnoseUnknownTypeName(const IdentifierInfo &II,
994 SourceLocation IILoc,
997 ParsedType &SuggestedType);
999 /// \brief Describes the result of the name lookup and resolution performed
1000 /// by \c ClassifyName().
1001 enum NameClassificationKind {
1007 NC_NestedNameSpecifier,
1012 class NameClassification {
1013 NameClassificationKind Kind;
1015 TemplateName Template;
1017 const IdentifierInfo *Keyword;
1019 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {}
1022 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {}
1024 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {}
1026 NameClassification(const IdentifierInfo *Keyword)
1027 : Kind(NC_Keyword), Keyword(Keyword) { }
1029 static NameClassification Error() {
1030 return NameClassification(NC_Error);
1033 static NameClassification Unknown() {
1034 return NameClassification(NC_Unknown);
1037 static NameClassification NestedNameSpecifier() {
1038 return NameClassification(NC_NestedNameSpecifier);
1041 static NameClassification TypeTemplate(TemplateName Name) {
1042 NameClassification Result(NC_TypeTemplate);
1043 Result.Template = Name;
1047 static NameClassification FunctionTemplate(TemplateName Name) {
1048 NameClassification Result(NC_FunctionTemplate);
1049 Result.Template = Name;
1053 NameClassificationKind getKind() const { return Kind; }
1055 ParsedType getType() const {
1056 assert(Kind == NC_Type);
1060 ExprResult getExpression() const {
1061 assert(Kind == NC_Expression);
1065 TemplateName getTemplateName() const {
1066 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1070 TemplateNameKind getTemplateNameKind() const {
1071 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate);
1072 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template;
1076 /// \brief Perform name lookup on the given name, classifying it based on
1077 /// the results of name lookup and the following token.
1079 /// This routine is used by the parser to resolve identifiers and help direct
1080 /// parsing. When the identifier cannot be found, this routine will attempt
1081 /// to correct the typo and classify based on the resulting name.
1083 /// \param S The scope in which we're performing name lookup.
1085 /// \param SS The nested-name-specifier that precedes the name.
1087 /// \param Name The identifier. If typo correction finds an alternative name,
1088 /// this pointer parameter will be updated accordingly.
1090 /// \param NameLoc The location of the identifier.
1092 /// \param NextToken The token following the identifier. Used to help
1093 /// disambiguate the name.
1094 NameClassification ClassifyName(Scope *S,
1096 IdentifierInfo *&Name,
1097 SourceLocation NameLoc,
1098 const Token &NextToken);
1100 Decl *ActOnDeclarator(Scope *S, Declarator &D);
1102 Decl *HandleDeclarator(Scope *S, Declarator &D,
1103 MultiTemplateParamsArg TemplateParameterLists);
1104 void RegisterLocallyScopedExternCDecl(NamedDecl *ND,
1105 const LookupResult &Previous,
1107 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info);
1108 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
1109 DeclarationName Name,
1110 SourceLocation Loc);
1111 void DiagnoseFunctionSpecifiers(Declarator& D);
1112 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R);
1113 void CheckShadow(Scope *S, VarDecl *D);
1114 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
1115 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D);
1116 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1117 TypeSourceInfo *TInfo,
1118 LookupResult &Previous);
1119 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D,
1120 LookupResult &Previous, bool &Redeclaration);
1121 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1122 TypeSourceInfo *TInfo,
1123 LookupResult &Previous,
1124 MultiTemplateParamsArg TemplateParamLists);
1125 // Returns true if the variable declaration is a redeclaration
1126 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
1127 void CheckCompleteVariableDeclaration(VarDecl *var);
1128 void ActOnStartFunctionDeclarator();
1129 void ActOnEndFunctionDeclarator();
1130 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1131 TypeSourceInfo *TInfo,
1132 LookupResult &Previous,
1133 MultiTemplateParamsArg TemplateParamLists,
1135 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1137 bool CheckConstexprFunctionDecl(const FunctionDecl *FD);
1138 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body);
1140 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1141 // Returns true if the function declaration is a redeclaration
1142 bool CheckFunctionDeclaration(Scope *S,
1143 FunctionDecl *NewFD, LookupResult &Previous,
1144 bool IsExplicitSpecialization);
1145 void CheckMain(FunctionDecl *FD, const DeclSpec &D);
1146 Decl *ActOnParamDeclarator(Scope *S, Declarator &D);
1147 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC,
1150 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
1151 SourceLocation NameLoc, IdentifierInfo *Name,
1152 QualType T, TypeSourceInfo *TSInfo,
1153 StorageClass SC, StorageClass SCAsWritten);
1154 void ActOnParamDefaultArgument(Decl *param,
1155 SourceLocation EqualLoc,
1157 void ActOnParamUnparsedDefaultArgument(Decl *param,
1158 SourceLocation EqualLoc,
1159 SourceLocation ArgLoc);
1160 void ActOnParamDefaultArgumentError(Decl *param);
1161 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg,
1162 SourceLocation EqualLoc);
1164 void CheckSelfReference(Decl *OrigDecl, Expr *E);
1165 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit,
1166 bool TypeMayContainAuto);
1167 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto);
1168 void ActOnInitializerError(Decl *Dcl);
1169 void ActOnCXXForRangeDecl(Decl *D);
1170 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc);
1171 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc);
1172 void FinalizeDeclaration(Decl *D);
1173 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS,
1176 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls,
1177 bool TypeMayContainAuto = true);
1178 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
1179 SourceLocation LocAfterDecls);
1180 void CheckForFunctionRedefinition(FunctionDecl *FD);
1181 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D);
1182 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D);
1183 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
1185 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
1186 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
1187 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
1189 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
1190 /// attribute for which parsing is delayed.
1191 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs);
1193 /// \brief Diagnose any unused parameters in the given sequence of
1194 /// ParmVarDecl pointers.
1195 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin,
1196 ParmVarDecl * const *End);
1198 /// \brief Diagnose whether the size of parameters or return value of a
1199 /// function or obj-c method definition is pass-by-value and larger than a
1200 /// specified threshold.
1201 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin,
1202 ParmVarDecl * const *End,
1206 void DiagnoseInvalidJumps(Stmt *Body);
1207 Decl *ActOnFileScopeAsmDecl(Expr *expr,
1208 SourceLocation AsmLoc,
1209 SourceLocation RParenLoc);
1211 /// \brief The parser has processed a module import declaration.
1213 /// \param AtLoc The location of the '@' symbol, if any.
1215 /// \param ImportLoc The location of the 'import' keyword.
1217 /// \param Path The module access path.
1218 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
1221 /// \brief Retrieve a suitable printing policy.
1222 PrintingPolicy getPrintingPolicy() const {
1223 return getPrintingPolicy(Context, PP);
1226 /// \brief Retrieve a suitable printing policy.
1227 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx,
1228 const Preprocessor &PP);
1231 void ActOnPopScope(SourceLocation Loc, Scope *S);
1232 void ActOnTranslationUnitScope(Scope *S);
1234 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1236 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
1238 MultiTemplateParamsArg TemplateParams);
1240 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
1242 RecordDecl *Record);
1244 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
1245 RecordDecl *Record);
1247 bool isAcceptableTagRedeclaration(const TagDecl *Previous,
1248 TagTypeKind NewTag, bool isDefinition,
1249 SourceLocation NewTagLoc,
1250 const IdentifierInfo &Name);
1253 TUK_Reference, // Reference to a tag: 'struct foo *X;'
1254 TUK_Declaration, // Fwd decl of a tag: 'struct foo;'
1255 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;'
1256 TUK_Friend // Friend declaration: 'friend struct foo;'
1259 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
1260 SourceLocation KWLoc, CXXScopeSpec &SS,
1261 IdentifierInfo *Name, SourceLocation NameLoc,
1262 AttributeList *Attr, AccessSpecifier AS,
1263 SourceLocation ModulePrivateLoc,
1264 MultiTemplateParamsArg TemplateParameterLists,
1265 bool &OwnedDecl, bool &IsDependent,
1266 SourceLocation ScopedEnumKWLoc,
1267 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType);
1269 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
1270 unsigned TagSpec, SourceLocation TagLoc,
1272 IdentifierInfo *Name, SourceLocation NameLoc,
1273 AttributeList *Attr,
1274 MultiTemplateParamsArg TempParamLists);
1276 TypeResult ActOnDependentTag(Scope *S,
1279 const CXXScopeSpec &SS,
1280 IdentifierInfo *Name,
1281 SourceLocation TagLoc,
1282 SourceLocation NameLoc);
1284 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart,
1285 IdentifierInfo *ClassName,
1286 SmallVectorImpl<Decl *> &Decls);
1287 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart,
1288 Declarator &D, Expr *BitfieldWidth);
1290 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart,
1291 Declarator &D, Expr *BitfieldWidth, bool HasInit,
1292 AccessSpecifier AS);
1294 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T,
1295 TypeSourceInfo *TInfo,
1296 RecordDecl *Record, SourceLocation Loc,
1297 bool Mutable, Expr *BitfieldWidth, bool HasInit,
1298 SourceLocation TSSL,
1299 AccessSpecifier AS, NamedDecl *PrevDecl,
1302 enum CXXSpecialMember {
1303 CXXDefaultConstructor,
1311 bool CheckNontrivialField(FieldDecl *FD);
1312 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem);
1313 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
1314 void ActOnLastBitfield(SourceLocation DeclStart,
1315 SmallVectorImpl<Decl *> &AllIvarDecls);
1316 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart,
1317 Declarator &D, Expr *BitfieldWidth,
1318 tok::ObjCKeywordKind visibility);
1320 // This is used for both record definitions and ObjC interface declarations.
1321 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
1322 llvm::ArrayRef<Decl *> Fields,
1323 SourceLocation LBrac, SourceLocation RBrac,
1324 AttributeList *AttrList);
1326 /// ActOnTagStartDefinition - Invoked when we have entered the
1327 /// scope of a tag's definition (e.g., for an enumeration, class,
1328 /// struct, or union).
1329 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl);
1331 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl);
1333 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a
1334 /// C++ record definition's base-specifiers clause and are starting its
1335 /// member declarations.
1336 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl,
1337 SourceLocation FinalLoc,
1338 SourceLocation LBraceLoc);
1340 /// ActOnTagFinishDefinition - Invoked once we have finished parsing
1341 /// the definition of a tag (enumeration, class, struct, or union).
1342 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl,
1343 SourceLocation RBraceLoc);
1345 void ActOnObjCContainerFinishDefinition();
1347 /// \brief Invoked when we must temporarily exit the objective-c container
1348 /// scope for parsing/looking-up C constructs.
1350 /// Must be followed by a call to \see ActOnObjCReenterContainerContext
1351 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC);
1352 void ActOnObjCReenterContainerContext(DeclContext *DC);
1354 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable
1355 /// error parsing the definition of a tag.
1356 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl);
1358 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum,
1359 EnumConstantDecl *LastEnumConst,
1360 SourceLocation IdLoc,
1363 bool CheckEnumUnderlyingType(TypeSourceInfo *TI);
1364 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
1365 QualType EnumUnderlyingTy, const EnumDecl *Prev);
1367 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant,
1368 SourceLocation IdLoc, IdentifierInfo *Id,
1369 AttributeList *Attrs,
1370 SourceLocation EqualLoc, Expr *Val);
1371 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
1372 SourceLocation RBraceLoc, Decl *EnumDecl,
1373 Decl **Elements, unsigned NumElements,
1374 Scope *S, AttributeList *Attr);
1376 DeclContext *getContainingDC(DeclContext *DC);
1378 /// Set the current declaration context until it gets popped.
1379 void PushDeclContext(Scope *S, DeclContext *DC);
1380 void PopDeclContext();
1382 /// EnterDeclaratorContext - Used when we must lookup names in the context
1383 /// of a declarator's nested name specifier.
1384 void EnterDeclaratorContext(Scope *S, DeclContext *DC);
1385 void ExitDeclaratorContext(Scope *S);
1387 /// Push the parameters of D, which must be a function, into scope.
1388 void ActOnReenterFunctionContext(Scope* S, Decl* D);
1389 void ActOnExitFunctionContext();
1391 DeclContext *getFunctionLevelDeclContext();
1393 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
1394 /// to the function decl for the function being parsed. If we're currently
1395 /// in a 'block', this returns the containing context.
1396 FunctionDecl *getCurFunctionDecl();
1398 /// getCurMethodDecl - If inside of a method body, this returns a pointer to
1399 /// the method decl for the method being parsed. If we're currently
1400 /// in a 'block', this returns the containing context.
1401 ObjCMethodDecl *getCurMethodDecl();
1403 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method
1404 /// or C function we're in, otherwise return null. If we're currently
1405 /// in a 'block', this returns the containing context.
1406 NamedDecl *getCurFunctionOrMethodDecl();
1408 /// Add this decl to the scope shadowed decl chains.
1409 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true);
1411 /// \brief Make the given externally-produced declaration visible at the
1412 /// top level scope.
1414 /// \param D The externally-produced declaration to push.
1416 /// \param Name The name of the externally-produced declaration.
1417 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name);
1419 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
1420 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
1421 /// true if 'D' belongs to the given declaration context.
1423 /// \param ExplicitInstantiationOrSpecialization When true, we are checking
1424 /// whether the declaration is in scope for the purposes of explicit template
1425 /// instantiation or specialization. The default is false.
1426 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0,
1427 bool ExplicitInstantiationOrSpecialization = false);
1429 /// Finds the scope corresponding to the given decl context, if it
1430 /// happens to be an enclosing scope. Otherwise return NULL.
1431 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC);
1433 /// Subroutines of ActOnDeclarator().
1434 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
1435 TypeSourceInfo *TInfo);
1436 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
1437 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true);
1438 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls);
1439 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S);
1440 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
1442 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
1443 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls);
1444 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old);
1445 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
1446 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
1448 // AssignmentAction - This is used by all the assignment diagnostic functions
1449 // to represent what is actually causing the operation
1450 enum AssignmentAction {
1460 /// C++ Overloading.
1462 /// This is a legitimate overload: the existing declarations are
1463 /// functions or function templates with different signatures.
1466 /// This is not an overload because the signature exactly matches
1467 /// an existing declaration.
1470 /// This is not an overload because the lookup results contain a
1474 OverloadKind CheckOverload(Scope *S,
1476 const LookupResult &OldDecls,
1477 NamedDecl *&OldDecl,
1478 bool IsForUsingDecl);
1479 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl);
1481 /// \brief Checks availability of the function depending on the current
1482 /// function context.Inside an unavailable function,unavailability is ignored.
1484 /// \returns true if \arg FD is unavailable and current context is inside
1485 /// an available function, false otherwise.
1486 bool isFunctionConsideredUnavailable(FunctionDecl *FD);
1488 ImplicitConversionSequence
1489 TryImplicitConversion(Expr *From, QualType ToType,
1490 bool SuppressUserConversions,
1492 bool InOverloadResolution,
1494 bool AllowObjCWritebackConversion);
1496 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType);
1497 bool IsFloatingPointPromotion(QualType FromType, QualType ToType);
1498 bool IsComplexPromotion(QualType FromType, QualType ToType);
1499 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
1500 bool InOverloadResolution,
1501 QualType& ConvertedType, bool &IncompatibleObjC);
1502 bool isObjCPointerConversion(QualType FromType, QualType ToType,
1503 QualType& ConvertedType, bool &IncompatibleObjC);
1504 bool isObjCWritebackConversion(QualType FromType, QualType ToType,
1505 QualType &ConvertedType);
1506 bool IsBlockPointerConversion(QualType FromType, QualType ToType,
1507 QualType& ConvertedType);
1508 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType,
1509 const FunctionProtoType *NewType,
1510 unsigned *ArgPos = 0);
1511 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
1512 QualType FromType, QualType ToType);
1514 CastKind PrepareCastToObjCObjectPointer(ExprResult &E);
1515 bool CheckPointerConversion(Expr *From, QualType ToType,
1517 CXXCastPath& BasePath,
1518 bool IgnoreBaseAccess);
1519 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
1520 bool InOverloadResolution,
1521 QualType &ConvertedType);
1522 bool CheckMemberPointerConversion(Expr *From, QualType ToType,
1524 CXXCastPath &BasePath,
1525 bool IgnoreBaseAccess);
1526 bool IsQualificationConversion(QualType FromType, QualType ToType,
1527 bool CStyle, bool &ObjCLifetimeConversion);
1528 bool IsNoReturnConversion(QualType FromType, QualType ToType,
1529 QualType &ResultTy);
1530 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType);
1533 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity,
1534 const VarDecl *NRVOCandidate,
1535 QualType ResultType,
1537 bool AllowNRVO = true);
1539 bool CanPerformCopyInitialization(const InitializedEntity &Entity,
1541 ExprResult PerformCopyInitialization(const InitializedEntity &Entity,
1542 SourceLocation EqualLoc,
1544 bool TopLevelOfInitList = false,
1545 bool AllowExplicit = false);
1546 ExprResult PerformObjectArgumentInitialization(Expr *From,
1547 NestedNameSpecifier *Qualifier,
1548 NamedDecl *FoundDecl,
1549 CXXMethodDecl *Method);
1551 ExprResult PerformContextuallyConvertToBool(Expr *From);
1552 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From);
1554 /// Contexts in which a converted constant expression is required.
1556 CCEK_CaseValue, ///< Expression in a case label.
1557 CCEK_Enumerator, ///< Enumerator value with fixed underlying type.
1558 CCEK_TemplateArg ///< Value of a non-type template parameter.
1560 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
1561 llvm::APSInt &Value, CCEKind CCE);
1564 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE,
1565 const PartialDiagnostic &NotIntDiag,
1566 const PartialDiagnostic &IncompleteDiag,
1567 const PartialDiagnostic &ExplicitConvDiag,
1568 const PartialDiagnostic &ExplicitConvNote,
1569 const PartialDiagnostic &AmbigDiag,
1570 const PartialDiagnostic &AmbigNote,
1571 const PartialDiagnostic &ConvDiag,
1572 bool AllowScopedEnumerations);
1573 enum ObjCSubscriptKind {
1578 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
1580 ExprResult PerformObjectMemberConversion(Expr *From,
1581 NestedNameSpecifier *Qualifier,
1582 NamedDecl *FoundDecl,
1585 // Members have to be NamespaceDecl* or TranslationUnitDecl*.
1586 // TODO: make this is a typesafe union.
1587 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet;
1588 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet;
1590 void AddOverloadCandidate(FunctionDecl *Function,
1591 DeclAccessPair FoundDecl,
1592 llvm::ArrayRef<Expr *> Args,
1593 OverloadCandidateSet& CandidateSet,
1594 bool SuppressUserConversions = false,
1595 bool PartialOverloading = false,
1596 bool AllowExplicit = false);
1597 void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
1598 llvm::ArrayRef<Expr *> Args,
1599 OverloadCandidateSet& CandidateSet,
1600 bool SuppressUserConversions = false,
1601 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
1602 void AddMethodCandidate(DeclAccessPair FoundDecl,
1603 QualType ObjectType,
1604 Expr::Classification ObjectClassification,
1605 Expr **Args, unsigned NumArgs,
1606 OverloadCandidateSet& CandidateSet,
1607 bool SuppressUserConversion = false);
1608 void AddMethodCandidate(CXXMethodDecl *Method,
1609 DeclAccessPair FoundDecl,
1610 CXXRecordDecl *ActingContext, QualType ObjectType,
1611 Expr::Classification ObjectClassification,
1612 llvm::ArrayRef<Expr *> Args,
1613 OverloadCandidateSet& CandidateSet,
1614 bool SuppressUserConversions = false);
1615 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
1616 DeclAccessPair FoundDecl,
1617 CXXRecordDecl *ActingContext,
1618 TemplateArgumentListInfo *ExplicitTemplateArgs,
1619 QualType ObjectType,
1620 Expr::Classification ObjectClassification,
1621 llvm::ArrayRef<Expr *> Args,
1622 OverloadCandidateSet& CandidateSet,
1623 bool SuppressUserConversions = false);
1624 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
1625 DeclAccessPair FoundDecl,
1626 TemplateArgumentListInfo *ExplicitTemplateArgs,
1627 llvm::ArrayRef<Expr *> Args,
1628 OverloadCandidateSet& CandidateSet,
1629 bool SuppressUserConversions = false);
1630 void AddConversionCandidate(CXXConversionDecl *Conversion,
1631 DeclAccessPair FoundDecl,
1632 CXXRecordDecl *ActingContext,
1633 Expr *From, QualType ToType,
1634 OverloadCandidateSet& CandidateSet);
1635 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
1636 DeclAccessPair FoundDecl,
1637 CXXRecordDecl *ActingContext,
1638 Expr *From, QualType ToType,
1639 OverloadCandidateSet &CandidateSet);
1640 void AddSurrogateCandidate(CXXConversionDecl *Conversion,
1641 DeclAccessPair FoundDecl,
1642 CXXRecordDecl *ActingContext,
1643 const FunctionProtoType *Proto,
1644 Expr *Object, llvm::ArrayRef<Expr*> Args,
1645 OverloadCandidateSet& CandidateSet);
1646 void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
1647 SourceLocation OpLoc,
1648 Expr **Args, unsigned NumArgs,
1649 OverloadCandidateSet& CandidateSet,
1650 SourceRange OpRange = SourceRange());
1651 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys,
1652 Expr **Args, unsigned NumArgs,
1653 OverloadCandidateSet& CandidateSet,
1654 bool IsAssignmentOperator = false,
1655 unsigned NumContextualBoolArguments = 0);
1656 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
1657 SourceLocation OpLoc,
1658 Expr **Args, unsigned NumArgs,
1659 OverloadCandidateSet& CandidateSet);
1660 void AddArgumentDependentLookupCandidates(DeclarationName Name,
1661 bool Operator, SourceLocation Loc,
1662 llvm::ArrayRef<Expr *> Args,
1663 TemplateArgumentListInfo *ExplicitTemplateArgs,
1664 OverloadCandidateSet& CandidateSet,
1665 bool PartialOverloading = false,
1666 bool StdNamespaceIsAssociated = false);
1668 // Emit as a 'note' the specific overload candidate
1669 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType());
1671 // Emit as a series of 'note's all template and non-templates
1672 // identified by the expression Expr
1673 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType());
1675 // [PossiblyAFunctionType] --> [Return]
1676 // NonFunctionType --> NonFunctionType
1678 // R (*)(A) --> R (A)
1679 // R (&)(A) --> R (A)
1680 // R (S::*)(A) --> R (A)
1681 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType);
1684 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
1685 QualType TargetType,
1687 DeclAccessPair &Found,
1688 bool *pHadMultipleCandidates = 0);
1690 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
1691 bool Complain = false,
1692 DeclAccessPair* Found = 0);
1694 bool ResolveAndFixSingleFunctionTemplateSpecialization(
1695 ExprResult &SrcExpr,
1696 bool DoFunctionPointerConverion = false,
1697 bool Complain = false,
1698 const SourceRange& OpRangeForComplaining = SourceRange(),
1699 QualType DestTypeForComplaining = QualType(),
1700 unsigned DiagIDForComplaining = 0);
1703 Expr *FixOverloadedFunctionReference(Expr *E,
1704 DeclAccessPair FoundDecl,
1706 ExprResult FixOverloadedFunctionReference(ExprResult,
1707 DeclAccessPair FoundDecl,
1710 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
1711 llvm::ArrayRef<Expr *> Args,
1712 OverloadCandidateSet &CandidateSet,
1713 bool PartialOverloading = false);
1715 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn,
1716 UnresolvedLookupExpr *ULE,
1717 SourceLocation LParenLoc,
1718 Expr **Args, unsigned NumArgs,
1719 SourceLocation RParenLoc,
1721 bool AllowTypoCorrection=true);
1723 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc,
1725 const UnresolvedSetImpl &Fns,
1728 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc,
1730 const UnresolvedSetImpl &Fns,
1731 Expr *LHS, Expr *RHS);
1733 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
1734 SourceLocation RLoc,
1735 Expr *Base,Expr *Idx);
1738 BuildCallToMemberFunction(Scope *S, Expr *MemExpr,
1739 SourceLocation LParenLoc, Expr **Args,
1740 unsigned NumArgs, SourceLocation RParenLoc);
1742 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc,
1743 Expr **Args, unsigned NumArgs,
1744 SourceLocation RParenLoc);
1746 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base,
1747 SourceLocation OpLoc);
1749 /// CheckCallReturnType - Checks that a call expression's return type is
1750 /// complete. Returns true on failure. The location passed in is the location
1751 /// that best represents the call.
1752 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
1753 CallExpr *CE, FunctionDecl *FD);
1755 /// Helpers for dealing with blocks and functions.
1756 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd,
1757 bool CheckParameterNames);
1758 void CheckCXXDefaultArguments(FunctionDecl *FD);
1759 void CheckExtraCXXDefaultArguments(Declarator &D);
1760 Scope *getNonFieldDeclScope(Scope *S);
1762 /// \name Name lookup
1764 /// These routines provide name lookup that is used during semantic
1765 /// analysis to resolve the various kinds of names (identifiers,
1766 /// overloaded operator names, constructor names, etc.) into zero or
1767 /// more declarations within a particular scope. The major entry
1768 /// points are LookupName, which performs unqualified name lookup,
1769 /// and LookupQualifiedName, which performs qualified name lookup.
1771 /// All name lookup is performed based on some specific criteria,
1772 /// which specify what names will be visible to name lookup and how
1773 /// far name lookup should work. These criteria are important both
1774 /// for capturing language semantics (certain lookups will ignore
1775 /// certain names, for example) and for performance, since name
1776 /// lookup is often a bottleneck in the compilation of C++. Name
1777 /// lookup criteria is specified via the LookupCriteria enumeration.
1779 /// The results of name lookup can vary based on the kind of name
1780 /// lookup performed, the current language, and the translation
1781 /// unit. In C, for example, name lookup will either return nothing
1782 /// (no entity found) or a single declaration. In C++, name lookup
1783 /// can additionally refer to a set of overloaded functions or
1784 /// result in an ambiguity. All of the possible results of name
1785 /// lookup are captured by the LookupResult class, which provides
1786 /// the ability to distinguish among them.
1789 /// @brief Describes the kind of name lookup to perform.
1790 enum LookupNameKind {
1791 /// Ordinary name lookup, which finds ordinary names (functions,
1792 /// variables, typedefs, etc.) in C and most kinds of names
1793 /// (functions, variables, members, types, etc.) in C++.
1794 LookupOrdinaryName = 0,
1795 /// Tag name lookup, which finds the names of enums, classes,
1796 /// structs, and unions.
1798 /// Label name lookup.
1800 /// Member name lookup, which finds the names of
1801 /// class/struct/union members.
1803 /// Look up of an operator name (e.g., operator+) for use with
1804 /// operator overloading. This lookup is similar to ordinary name
1805 /// lookup, but will ignore any declarations that are class members.
1807 /// Look up of a name that precedes the '::' scope resolution
1808 /// operator in C++. This lookup completely ignores operator, object,
1809 /// function, and enumerator names (C++ [basic.lookup.qual]p1).
1810 LookupNestedNameSpecifierName,
1811 /// Look up a namespace name within a C++ using directive or
1812 /// namespace alias definition, ignoring non-namespace names (C++
1813 /// [basic.lookup.udir]p1).
1814 LookupNamespaceName,
1815 /// Look up all declarations in a scope with the given name,
1816 /// including resolved using declarations. This is appropriate
1817 /// for checking redeclarations for a using declaration.
1818 LookupUsingDeclName,
1819 /// Look up an ordinary name that is going to be redeclared as a
1820 /// name with linkage. This lookup ignores any declarations that
1821 /// are outside of the current scope unless they have linkage. See
1822 /// C99 6.2.2p4-5 and C++ [basic.link]p6.
1823 LookupRedeclarationWithLinkage,
1824 /// Look up the name of an Objective-C protocol.
1825 LookupObjCProtocolName,
1826 /// Look up implicit 'self' parameter of an objective-c method.
1827 LookupObjCImplicitSelfParam,
1828 /// \brief Look up any declaration with any name.
1832 /// \brief Specifies whether (or how) name lookup is being performed for a
1833 /// redeclaration (vs. a reference).
1834 enum RedeclarationKind {
1835 /// \brief The lookup is a reference to this name that is not for the
1836 /// purpose of redeclaring the name.
1837 NotForRedeclaration = 0,
1838 /// \brief The lookup results will be used for redeclaration of a name,
1839 /// if an entity by that name already exists.
1843 /// \brief The possible outcomes of name lookup for a literal operator.
1844 enum LiteralOperatorLookupResult {
1845 /// \brief The lookup resulted in an error.
1847 /// \brief The lookup found a single 'cooked' literal operator, which
1848 /// expects a normal literal to be built and passed to it.
1850 /// \brief The lookup found a single 'raw' literal operator, which expects
1851 /// a string literal containing the spelling of the literal token.
1853 /// \brief The lookup found an overload set of literal operator templates,
1854 /// which expect the characters of the spelling of the literal token to be
1855 /// passed as a non-type template argument pack.
1859 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D,
1860 CXXSpecialMember SM,
1868 bool CppLookupName(LookupResult &R, Scope *S);
1870 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls.
1872 // The boolean value will be true to indicate that the namespace was loaded
1873 // from an AST/PCH file, or false otherwise.
1874 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces;
1876 /// \brief Whether we have already loaded known namespaces from an extenal
1878 bool LoadedExternalKnownNamespaces;
1881 /// \brief Look up a name, looking for a single declaration. Return
1882 /// null if the results were absent, ambiguous, or overloaded.
1884 /// It is preferable to use the elaborated form and explicitly handle
1885 /// ambiguity and overloaded.
1886 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
1888 LookupNameKind NameKind,
1889 RedeclarationKind Redecl
1890 = NotForRedeclaration);
1891 bool LookupName(LookupResult &R, Scope *S,
1892 bool AllowBuiltinCreation = false);
1893 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
1894 bool InUnqualifiedLookup = false);
1895 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
1896 bool AllowBuiltinCreation = false,
1897 bool EnteringContext = false);
1898 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc,
1899 RedeclarationKind Redecl
1900 = NotForRedeclaration);
1902 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S,
1903 QualType T1, QualType T2,
1904 UnresolvedSetImpl &Functions);
1906 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc,
1907 SourceLocation GnuLabelLoc = SourceLocation());
1909 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class);
1910 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class);
1911 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class,
1913 bool *ConstParam = 0);
1914 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals,
1915 bool RValueThis, unsigned ThisQuals,
1916 bool *ConstParam = 0);
1917 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class);
1918 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis,
1919 unsigned ThisQuals);
1920 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class);
1922 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R,
1923 ArrayRef<QualType> ArgTys,
1924 bool AllowRawAndTemplate);
1926 void ArgumentDependentLookup(DeclarationName Name, bool Operator,
1928 llvm::ArrayRef<Expr *> Args,
1929 ADLResult &Functions,
1930 bool StdNamespaceIsAssociated = false);
1932 void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
1933 VisibleDeclConsumer &Consumer,
1934 bool IncludeGlobalScope = true);
1935 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind,
1936 VisibleDeclConsumer &Consumer,
1937 bool IncludeGlobalScope = true);
1939 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
1940 Sema::LookupNameKind LookupKind,
1941 Scope *S, CXXScopeSpec *SS,
1942 CorrectionCandidateCallback &CCC,
1943 DeclContext *MemberContext = 0,
1944 bool EnteringContext = false,
1945 const ObjCObjectPointerType *OPT = 0);
1947 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args,
1948 AssociatedNamespaceSet &AssociatedNamespaces,
1949 AssociatedClassSet &AssociatedClasses);
1951 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,
1952 bool ConsiderLinkage,
1953 bool ExplicitInstantiationOrSpecialization);
1955 bool DiagnoseAmbiguousLookup(LookupResult &Result);
1958 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id,
1959 SourceLocation IdLoc,
1960 bool TypoCorrection = false);
1961 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
1962 Scope *S, bool ForRedeclaration,
1963 SourceLocation Loc);
1964 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
1966 void AddKnownFunctionAttributes(FunctionDecl *FD);
1968 // More parsing and symbol table subroutines.
1970 // Decl attributes - this routine is the top level dispatcher.
1971 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD,
1972 bool NonInheritable = true, bool Inheritable = true);
1973 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
1974 bool NonInheritable = true, bool Inheritable = true);
1975 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
1976 const AttributeList *AttrList);
1978 void checkUnusedDeclAttributes(Declarator &D);
1980 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
1981 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC);
1982 bool CheckNoReturnAttr(const AttributeList &attr);
1984 /// \brief Stmt attributes - this routine is the top level dispatcher.
1985 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
1988 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
1989 bool &IncompleteImpl, unsigned DiagID);
1990 void WarnConflictingTypedMethods(ObjCMethodDecl *Method,
1991 ObjCMethodDecl *MethodDecl,
1992 bool IsProtocolMethodDecl);
1994 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method,
1995 ObjCMethodDecl *Overridden,
1996 bool IsProtocolMethodDecl);
1998 /// WarnExactTypedMethods - This routine issues a warning if method
1999 /// implementation declaration matches exactly that of its declaration.
2000 void WarnExactTypedMethods(ObjCMethodDecl *Method,
2001 ObjCMethodDecl *MethodDecl,
2002 bool IsProtocolMethodDecl);
2004 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl,
2005 ObjCInterfaceDecl *IDecl);
2007 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet;
2008 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap;
2010 /// CheckProtocolMethodDefs - This routine checks unimplemented
2011 /// methods declared in protocol, and those referenced by it.
2012 /// \param IDecl - Used for checking for methods which may have been
2014 void CheckProtocolMethodDefs(SourceLocation ImpLoc,
2015 ObjCProtocolDecl *PDecl,
2016 bool& IncompleteImpl,
2017 const SelectorSet &InsMap,
2018 const SelectorSet &ClsMap,
2019 ObjCContainerDecl *CDecl);
2021 /// CheckImplementationIvars - This routine checks if the instance variables
2022 /// listed in the implelementation match those listed in the interface.
2023 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
2024 ObjCIvarDecl **Fields, unsigned nIvars,
2025 SourceLocation Loc);
2027 /// ImplMethodsVsClassMethods - This is main routine to warn if any method
2028 /// remains unimplemented in the class or category @implementation.
2029 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl,
2030 ObjCContainerDecl* IDecl,
2031 bool IncompleteImpl = false);
2033 /// DiagnoseUnimplementedProperties - This routine warns on those properties
2034 /// which must be implemented by this implementation.
2035 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
2036 ObjCContainerDecl *CDecl,
2037 const SelectorSet &InsMap);
2039 /// DefaultSynthesizeProperties - This routine default synthesizes all
2040 /// properties which must be synthesized in class's @implementation.
2041 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl,
2042 ObjCInterfaceDecl *IDecl);
2043 void DefaultSynthesizeProperties(Scope *S, Decl *D);
2045 /// CollectImmediateProperties - This routine collects all properties in
2046 /// the class and its conforming protocols; but not those it its super class.
2047 void CollectImmediateProperties(ObjCContainerDecl *CDecl,
2048 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap,
2049 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap);
2052 /// LookupPropertyDecl - Looks up a property in the current class and all
2054 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl,
2055 IdentifierInfo *II);
2057 /// Called by ActOnProperty to handle @property declarations in
2058 //// class extensions.
2059 Decl *HandlePropertyInClassExtension(Scope *S,
2060 SourceLocation AtLoc,
2061 SourceLocation LParenLoc,
2062 FieldDeclarator &FD,
2065 const bool isAssign,
2066 const bool isReadWrite,
2067 const unsigned Attributes,
2068 const unsigned AttributesAsWritten,
2069 bool *isOverridingProperty,
2071 tok::ObjCKeywordKind MethodImplKind);
2073 /// Called by ActOnProperty and HandlePropertyInClassExtension to
2074 /// handle creating the ObjcPropertyDecl for a category or @interface.
2075 ObjCPropertyDecl *CreatePropertyDecl(Scope *S,
2076 ObjCContainerDecl *CDecl,
2077 SourceLocation AtLoc,
2078 SourceLocation LParenLoc,
2079 FieldDeclarator &FD,
2082 const bool isAssign,
2083 const bool isReadWrite,
2084 const unsigned Attributes,
2085 const unsigned AttributesAsWritten,
2087 tok::ObjCKeywordKind MethodImplKind,
2088 DeclContext *lexicalDC = 0);
2090 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via
2091 /// warning) when atomic property has one but not the other user-declared
2092 /// setter or getter.
2093 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl,
2094 ObjCContainerDecl* IDecl);
2096 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D);
2098 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID);
2100 enum MethodMatchStrategy {
2105 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
2106 /// true, or false, accordingly.
2107 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
2108 const ObjCMethodDecl *PrevMethod,
2109 MethodMatchStrategy strategy = MMS_strict);
2111 /// MatchAllMethodDeclarations - Check methods declaraed in interface or
2112 /// or protocol against those declared in their implementations.
2113 void MatchAllMethodDeclarations(const SelectorSet &InsMap,
2114 const SelectorSet &ClsMap,
2115 SelectorSet &InsMapSeen,
2116 SelectorSet &ClsMapSeen,
2117 ObjCImplDecl* IMPDecl,
2118 ObjCContainerDecl* IDecl,
2119 bool &IncompleteImpl,
2120 bool ImmediateClass,
2121 bool WarnCategoryMethodImpl=false);
2123 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in
2124 /// category matches with those implemented in its primary class and
2125 /// warns each time an exact match is found.
2126 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP);
2128 /// \brief Add the given method to the list of globally-known methods.
2129 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method);
2132 /// AddMethodToGlobalPool - Add an instance or factory method to the global
2133 /// pool. See descriptoin of AddInstanceMethodToGlobalPool.
2134 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance);
2136 /// LookupMethodInGlobalPool - Returns the instance or factory method and
2137 /// optionally warns if there are multiple signatures.
2138 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R,
2139 bool receiverIdOrClass,
2140 bool warn, bool instance);
2143 /// AddInstanceMethodToGlobalPool - All instance methods in a translation
2144 /// unit are added to a global pool. This allows us to efficiently associate
2145 /// a selector with a method declaraation for purposes of typechecking
2146 /// messages sent to "id" (where the class of the object is unknown).
2147 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2148 AddMethodToGlobalPool(Method, impl, /*instance*/true);
2151 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
2152 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
2153 AddMethodToGlobalPool(Method, impl, /*instance*/false);
2156 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global
2158 void AddAnyMethodToGlobalPool(Decl *D);
2160 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
2161 /// there are multiple signatures.
2162 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R,
2163 bool receiverIdOrClass=false,
2165 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2166 warn, /*instance*/true);
2169 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if
2170 /// there are multiple signatures.
2171 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R,
2172 bool receiverIdOrClass=false,
2174 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
2175 warn, /*instance*/false);
2178 /// LookupImplementedMethodInGlobalPool - Returns the method which has an
2180 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel);
2182 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require
2184 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI,
2185 SmallVectorImpl<ObjCIvarDecl*> &Ivars);
2187 //===--------------------------------------------------------------------===//
2188 // Statement Parsing Callbacks: SemaStmt.cpp.
2192 FullExprArg(Sema &actions) : E(0) { }
2194 // FIXME: The const_cast here is ugly. RValue references would make this
2195 // much nicer (or we could duplicate a bunch of the move semantics
2196 // emulation code from Ownership.h).
2197 FullExprArg(const FullExprArg& Other) : E(Other.E) {}
2199 ExprResult release() {
2203 Expr *get() const { return E; }
2205 Expr *operator->() {
2210 // FIXME: No need to make the entire Sema class a friend when it's just
2211 // Sema::MakeFullExpr that needs access to the constructor below.
2214 explicit FullExprArg(Expr *expr) : E(expr) {}
2219 FullExprArg MakeFullExpr(Expr *Arg) {
2220 return FullExprArg(ActOnFinishFullExpr(Arg).release());
2223 StmtResult ActOnExprStmt(FullExprArg Expr);
2225 StmtResult ActOnNullStmt(SourceLocation SemiLoc,
2226 bool HasLeadingEmptyMacro = false);
2228 void ActOnStartOfCompoundStmt();
2229 void ActOnFinishOfCompoundStmt();
2230 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
2234 /// \brief A RAII object to enter scope of a compound statement.
2235 class CompoundScopeRAII {
2237 CompoundScopeRAII(Sema &S): S(S) {
2238 S.ActOnStartOfCompoundStmt();
2241 ~CompoundScopeRAII() {
2242 S.ActOnFinishOfCompoundStmt();
2249 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl,
2250 SourceLocation StartLoc,
2251 SourceLocation EndLoc);
2252 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl);
2253 StmtResult ActOnForEachLValueExpr(Expr *E);
2254 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal,
2255 SourceLocation DotDotDotLoc, Expr *RHSVal,
2256 SourceLocation ColonLoc);
2257 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt);
2259 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
2260 SourceLocation ColonLoc,
2261 Stmt *SubStmt, Scope *CurScope);
2262 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
2263 SourceLocation ColonLoc, Stmt *SubStmt);
2265 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc, const AttrVec &Attrs,
2268 StmtResult ActOnIfStmt(SourceLocation IfLoc,
2269 FullExprArg CondVal, Decl *CondVar,
2271 SourceLocation ElseLoc, Stmt *ElseVal);
2272 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc,
2275 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
2276 Stmt *Switch, Stmt *Body);
2277 StmtResult ActOnWhileStmt(SourceLocation WhileLoc,
2279 Decl *CondVar, Stmt *Body);
2280 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body,
2281 SourceLocation WhileLoc,
2282 SourceLocation CondLParen, Expr *Cond,
2283 SourceLocation CondRParen);
2285 StmtResult ActOnForStmt(SourceLocation ForLoc,
2286 SourceLocation LParenLoc,
2287 Stmt *First, FullExprArg Second,
2290 SourceLocation RParenLoc,
2292 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc,
2294 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
2295 SourceLocation LParenLoc,
2296 Stmt *First, Expr *Second,
2297 SourceLocation RParenLoc, Stmt *Body);
2298 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc,
2299 SourceLocation LParenLoc, Stmt *LoopVar,
2300 SourceLocation ColonLoc, Expr *Collection,
2301 SourceLocation RParenLoc);
2302 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc,
2303 SourceLocation ColonLoc,
2304 Stmt *RangeDecl, Stmt *BeginEndDecl,
2305 Expr *Cond, Expr *Inc,
2307 SourceLocation RParenLoc);
2308 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body);
2310 StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
2311 SourceLocation LabelLoc,
2312 LabelDecl *TheDecl);
2313 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
2314 SourceLocation StarLoc,
2316 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
2317 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope);
2319 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
2320 bool AllowFunctionParameters);
2322 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2323 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
2325 StmtResult ActOnAsmStmt(SourceLocation AsmLoc,
2326 bool IsSimple, bool IsVolatile,
2327 unsigned NumOutputs, unsigned NumInputs,
2328 IdentifierInfo **Names,
2329 MultiExprArg Constraints,
2332 MultiExprArg Clobbers,
2333 SourceLocation RParenLoc,
2334 bool MSAsm = false);
2337 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType,
2338 SourceLocation StartLoc,
2339 SourceLocation IdLoc, IdentifierInfo *Id,
2340 bool Invalid = false);
2342 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D);
2344 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen,
2345 Decl *Parm, Stmt *Body);
2347 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body);
2349 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
2350 MultiStmtArg Catch, Stmt *Finally);
2352 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw);
2353 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw,
2355 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc,
2357 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
2361 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body);
2363 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo,
2364 SourceLocation StartLoc,
2365 SourceLocation IdLoc,
2366 IdentifierInfo *Id);
2368 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D);
2370 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc,
2371 Decl *ExDecl, Stmt *HandlerBlock);
2372 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
2373 MultiStmtArg Handlers);
2375 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ?
2376 SourceLocation TryLoc,
2380 StmtResult ActOnSEHExceptBlock(SourceLocation Loc,
2384 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc,
2387 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock);
2389 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const;
2391 /// \brief If it's a file scoped decl that must warn if not used, keep track
2393 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D);
2395 /// DiagnoseUnusedExprResult - If the statement passed in is an expression
2396 /// whose result is unused, warn.
2397 void DiagnoseUnusedExprResult(const Stmt *S);
2398 void DiagnoseUnusedDecl(const NamedDecl *ND);
2400 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null
2401 /// statement as a \p Body, and it is located on the same line.
2403 /// This helps prevent bugs due to typos, such as:
2406 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
2410 /// Warn if a for/while loop statement \p S, which is followed by
2411 /// \p PossibleBody, has a suspicious null statement as a body.
2412 void DiagnoseEmptyLoopBody(const Stmt *S,
2413 const Stmt *PossibleBody);
2415 ParsingDeclState PushParsingDeclaration() {
2416 return DelayedDiagnostics.pushParsingDecl();
2418 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) {
2419 DelayedDiagnostics::popParsingDecl(*this, state, decl);
2422 typedef ProcessingContextState ParsingClassState;
2423 ParsingClassState PushParsingClass() {
2424 return DelayedDiagnostics.pushContext();
2426 void PopParsingClass(ParsingClassState state) {
2427 DelayedDiagnostics.popContext(state);
2430 void EmitDeprecationWarning(NamedDecl *D, StringRef Message,
2432 const ObjCInterfaceDecl *UnknownObjCClass=0);
2434 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
2436 bool makeUnavailableInSystemHeader(SourceLocation loc,
2439 //===--------------------------------------------------------------------===//
2440 // Expression Parsing Callbacks: SemaExpr.cpp.
2442 bool CanUseDecl(NamedDecl *D);
2443 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
2444 const ObjCInterfaceDecl *UnknownObjCClass=0);
2445 void NoteDeletedFunction(FunctionDecl *FD);
2446 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD);
2447 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD,
2448 ObjCMethodDecl *Getter,
2449 SourceLocation Loc);
2450 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
2451 Expr **Args, unsigned NumArgs);
2453 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
2454 Decl *LambdaContextDecl = 0,
2455 bool IsDecltype = false);
2457 void PopExpressionEvaluationContext();
2459 void DiscardCleanupsInEvaluationContext();
2461 ExprResult TranformToPotentiallyEvaluated(Expr *E);
2462 ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
2464 ExprResult ActOnConstantExpression(ExprResult Res);
2466 // Functions for marking a declaration referenced. These functions also
2467 // contain the relevant logic for marking if a reference to a function or
2468 // variable is an odr-use (in the C++11 sense). There are separate variants
2469 // for expressions referring to a decl; these exist because odr-use marking
2470 // needs to be delayed for some constant variables when we build one of the
2471 // named expressions.
2472 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D);
2473 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func);
2474 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
2475 void MarkDeclRefReferenced(DeclRefExpr *E);
2476 void MarkMemberReferenced(MemberExpr *E);
2478 void UpdateMarkingForLValueToRValue(Expr *E);
2479 void CleanupVarDeclMarking();
2481 enum TryCaptureKind {
2482 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef
2485 /// \brief Try to capture the given variable.
2487 /// \param Var The variable to capture.
2489 /// \param Loc The location at which the capture occurs.
2491 /// \param Kind The kind of capture, which may be implicit (for either a
2492 /// block or a lambda), or explicit by-value or by-reference (for a lambda).
2494 /// \param EllipsisLoc The location of the ellipsis, if one is provided in
2495 /// an explicit lambda capture.
2497 /// \param BuildAndDiagnose Whether we are actually supposed to add the
2498 /// captures or diagnose errors. If false, this routine merely check whether
2499 /// the capture can occur without performing the capture itself or complaining
2500 /// if the variable cannot be captured.
2502 /// \param CaptureType Will be set to the type of the field used to capture
2503 /// this variable in the innermost block or lambda. Only valid when the
2504 /// variable can be captured.
2506 /// \param DeclRefType Will be set to the type of a refernce to the capture
2507 /// from within the current scope. Only valid when the variable can be
2510 /// \returns true if an error occurred (i.e., the variable cannot be
2511 /// captured) and false if the capture succeeded.
2512 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind,
2513 SourceLocation EllipsisLoc, bool BuildAndDiagnose,
2514 QualType &CaptureType,
2515 QualType &DeclRefType);
2517 /// \brief Try to capture the given variable.
2518 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
2519 TryCaptureKind Kind = TryCapture_Implicit,
2520 SourceLocation EllipsisLoc = SourceLocation());
2522 /// \brief Given a variable, determine the type that a reference to that
2523 /// variable will have in the given scope.
2524 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc);
2526 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T);
2527 void MarkDeclarationsReferencedInExpr(Expr *E,
2528 bool SkipLocalVariables = false);
2530 /// \brief Try to recover by turning the given expression into a
2531 /// call. Returns true if recovery was attempted or an error was
2532 /// emitted; this may also leave the ExprResult invalid.
2533 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
2534 bool ForceComplain = false,
2535 bool (*IsPlausibleResult)(QualType) = 0);
2537 /// \brief Figure out if an expression could be turned into a call.
2538 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy,
2539 UnresolvedSetImpl &NonTemplateOverloads);
2541 /// \brief Conditionally issue a diagnostic based on the current
2542 /// evaluation context.
2544 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until
2545 /// the function body is parsed, and then do a basic reachability analysis to
2546 /// determine if the statement is reachable. If it is unreachable, the
2547 /// diagnostic will not be emitted.
2548 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
2549 const PartialDiagnostic &PD);
2551 // Primary Expressions.
2552 SourceRange getExprRange(Expr *E) const;
2554 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS,
2555 SourceLocation TemplateKWLoc,
2557 bool HasTrailingLParen, bool IsAddressOfOperand,
2558 CorrectionCandidateCallback *CCC = 0);
2560 void DecomposeUnqualifiedId(const UnqualifiedId &Id,
2561 TemplateArgumentListInfo &Buffer,
2562 DeclarationNameInfo &NameInfo,
2563 const TemplateArgumentListInfo *&TemplateArgs);
2565 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
2566 CorrectionCandidateCallback &CCC,
2567 TemplateArgumentListInfo *ExplicitTemplateArgs = 0,
2568 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>());
2570 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
2572 bool AllowBuiltinCreation=false);
2574 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS,
2575 SourceLocation TemplateKWLoc,
2576 const DeclarationNameInfo &NameInfo,
2577 bool isAddressOfOperand,
2578 const TemplateArgumentListInfo *TemplateArgs);
2580 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2583 const CXXScopeSpec *SS = 0);
2584 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
2586 const DeclarationNameInfo &NameInfo,
2587 const CXXScopeSpec *SS = 0);
2589 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS,
2590 SourceLocation nameLoc,
2591 IndirectFieldDecl *indirectField,
2592 Expr *baseObjectExpr = 0,
2593 SourceLocation opLoc = SourceLocation());
2594 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS,
2595 SourceLocation TemplateKWLoc,
2597 const TemplateArgumentListInfo *TemplateArgs);
2598 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS,
2599 SourceLocation TemplateKWLoc,
2601 const TemplateArgumentListInfo *TemplateArgs,
2602 bool IsDefiniteInstance);
2603 bool UseArgumentDependentLookup(const CXXScopeSpec &SS,
2604 const LookupResult &R,
2605 bool HasTrailingLParen);
2607 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
2608 const DeclarationNameInfo &NameInfo);
2609 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS,
2610 SourceLocation TemplateKWLoc,
2611 const DeclarationNameInfo &NameInfo,
2612 const TemplateArgumentListInfo *TemplateArgs);
2614 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2617 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
2618 const DeclarationNameInfo &NameInfo,
2621 ExprResult BuildLiteralOperatorCall(LookupResult &R,
2622 DeclarationNameInfo &SuffixInfo,
2623 ArrayRef<Expr*> Args,
2624 SourceLocation LitEndLoc,
2625 TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
2627 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind);
2628 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val);
2629 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0);
2630 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0);
2631 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E);
2632 ExprResult ActOnParenListExpr(SourceLocation L,
2636 /// ActOnStringLiteral - The specified tokens were lexed as pasted string
2637 /// fragments (e.g. "foo" "bar" L"baz").
2638 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks,
2639 Scope *UDLScope = 0);
2641 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc,
2642 SourceLocation DefaultLoc,
2643 SourceLocation RParenLoc,
2644 Expr *ControllingExpr,
2645 MultiTypeArg ArgTypes,
2646 MultiExprArg ArgExprs);
2647 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc,
2648 SourceLocation DefaultLoc,
2649 SourceLocation RParenLoc,
2650 Expr *ControllingExpr,
2651 TypeSourceInfo **Types,
2653 unsigned NumAssocs);
2655 // Binary/Unary Operators. 'Tok' is the token for the operator.
2656 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
2658 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc,
2659 UnaryOperatorKind Opc, Expr *Input);
2660 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
2661 tok::TokenKind Op, Expr *Input);
2663 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
2664 SourceLocation OpLoc,
2665 UnaryExprOrTypeTrait ExprKind,
2667 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
2668 UnaryExprOrTypeTrait ExprKind);
2670 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
2671 UnaryExprOrTypeTrait ExprKind,
2672 bool IsType, void *TyOrEx,
2673 const SourceRange &ArgRange);
2675 ExprResult CheckPlaceholderExpr(Expr *E);
2676 bool CheckVecStepExpr(Expr *E);
2678 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind);
2679 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc,
2680 SourceRange ExprRange,
2681 UnaryExprOrTypeTrait ExprKind);
2682 ExprResult ActOnSizeofParameterPackExpr(Scope *S,
2683 SourceLocation OpLoc,
2684 IdentifierInfo &Name,
2685 SourceLocation NameLoc,
2686 SourceLocation RParenLoc);
2687 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
2688 tok::TokenKind Kind, Expr *Input);
2690 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
2691 Expr *Idx, SourceLocation RLoc);
2692 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
2693 Expr *Idx, SourceLocation RLoc);
2695 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
2696 SourceLocation OpLoc, bool IsArrow,
2698 SourceLocation TemplateKWLoc,
2699 NamedDecl *FirstQualifierInScope,
2700 const DeclarationNameInfo &NameInfo,
2701 const TemplateArgumentListInfo *TemplateArgs);
2703 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType,
2704 SourceLocation OpLoc, bool IsArrow,
2705 const CXXScopeSpec &SS,
2706 SourceLocation TemplateKWLoc,
2707 NamedDecl *FirstQualifierInScope,
2709 const TemplateArgumentListInfo *TemplateArgs,
2710 bool SuppressQualifierCheck = false);
2712 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow);
2713 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base,
2714 bool &IsArrow, SourceLocation OpLoc,
2717 bool HasTemplateArgs);
2719 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType,
2720 const CXXScopeSpec &SS,
2721 const LookupResult &R);
2723 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType,
2724 bool IsArrow, SourceLocation OpLoc,
2725 const CXXScopeSpec &SS,
2726 SourceLocation TemplateKWLoc,
2727 NamedDecl *FirstQualifierInScope,
2728 const DeclarationNameInfo &NameInfo,
2729 const TemplateArgumentListInfo *TemplateArgs);
2731 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base,
2732 SourceLocation OpLoc,
2733 tok::TokenKind OpKind,
2735 SourceLocation TemplateKWLoc,
2736 UnqualifiedId &Member,
2738 bool HasTrailingLParen);
2740 void ActOnDefaultCtorInitializers(Decl *CDtorDecl);
2741 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
2742 FunctionDecl *FDecl,
2743 const FunctionProtoType *Proto,
2744 Expr **Args, unsigned NumArgs,
2745 SourceLocation RParenLoc,
2746 bool ExecConfig = false);
2747 void CheckStaticArrayArgument(SourceLocation CallLoc,
2749 const Expr *ArgExpr);
2751 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
2752 /// This provides the location of the left/right parens and a list of comma
2754 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
2755 MultiExprArg ArgExprs, SourceLocation RParenLoc,
2756 Expr *ExecConfig = 0, bool IsExecConfig = false);
2757 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
2758 SourceLocation LParenLoc,
2759 Expr **Args, unsigned NumArgs,
2760 SourceLocation RParenLoc,
2762 bool IsExecConfig = false);
2764 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
2765 MultiExprArg ExecConfig,
2766 SourceLocation GGGLoc);
2768 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
2769 Declarator &D, ParsedType &Ty,
2770 SourceLocation RParenLoc, Expr *CastExpr);
2771 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc,
2773 SourceLocation RParenLoc,
2775 CastKind PrepareScalarCast(ExprResult &src, QualType destType);
2777 /// \brief Build an altivec or OpenCL literal.
2778 ExprResult BuildVectorLiteral(SourceLocation LParenLoc,
2779 SourceLocation RParenLoc, Expr *E,
2780 TypeSourceInfo *TInfo);
2782 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME);
2784 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc,
2786 SourceLocation RParenLoc,
2789 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc,
2790 TypeSourceInfo *TInfo,
2791 SourceLocation RParenLoc,
2794 ExprResult ActOnInitList(SourceLocation LBraceLoc,
2795 MultiExprArg InitArgList,
2796 SourceLocation RBraceLoc);
2798 ExprResult ActOnDesignatedInitializer(Designation &Desig,
2803 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc,
2804 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr);
2805 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc,
2806 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr);
2807 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc,
2808 Expr *LHSExpr, Expr *RHSExpr);
2810 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
2811 /// in the case of a the GNU conditional expr extension.
2812 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
2813 SourceLocation ColonLoc,
2814 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr);
2816 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
2817 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
2818 LabelDecl *TheDecl);
2820 void ActOnStartStmtExpr();
2821 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
2822 SourceLocation RPLoc); // "({..})"
2823 void ActOnStmtExprError();
2825 // __builtin_offsetof(type, identifier(.identifier|[expr])*)
2826 struct OffsetOfComponent {
2827 SourceLocation LocStart, LocEnd;
2828 bool isBrackets; // true if [expr], false if .ident
2830 IdentifierInfo *IdentInfo;
2835 /// __builtin_offsetof(type, a.b[123][456].c)
2836 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
2837 TypeSourceInfo *TInfo,
2838 OffsetOfComponent *CompPtr,
2839 unsigned NumComponents,
2840 SourceLocation RParenLoc);
2841 ExprResult ActOnBuiltinOffsetOf(Scope *S,
2842 SourceLocation BuiltinLoc,
2843 SourceLocation TypeLoc,
2844 ParsedType ParsedArgTy,
2845 OffsetOfComponent *CompPtr,
2846 unsigned NumComponents,
2847 SourceLocation RParenLoc);
2849 // __builtin_choose_expr(constExpr, expr1, expr2)
2850 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
2851 Expr *CondExpr, Expr *LHSExpr,
2852 Expr *RHSExpr, SourceLocation RPLoc);
2854 // __builtin_va_arg(expr, type)
2855 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty,
2856 SourceLocation RPLoc);
2857 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E,
2858 TypeSourceInfo *TInfo, SourceLocation RPLoc);
2861 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc);
2863 bool CheckCaseExpression(Expr *E);
2865 /// \brief Describes the result of an "if-exists" condition check.
2866 enum IfExistsResult {
2867 /// \brief The symbol exists.
2870 /// \brief The symbol does not exist.
2873 /// \brief The name is a dependent name, so the results will differ
2874 /// from one instantiation to the next.
2877 /// \brief An error occurred.
2882 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS,
2883 const DeclarationNameInfo &TargetNameInfo);
2886 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc,
2887 bool IsIfExists, CXXScopeSpec &SS,
2888 UnqualifiedId &Name);
2890 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc,
2892 NestedNameSpecifierLoc QualifierLoc,
2893 DeclarationNameInfo NameInfo,
2895 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc,
2897 CXXScopeSpec &SS, UnqualifiedId &Name,
2900 //===------------------------- "Block" Extension ------------------------===//
2902 /// ActOnBlockStart - This callback is invoked when a block literal is
2904 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope);
2906 /// ActOnBlockArguments - This callback allows processing of block arguments.
2907 /// If there are no arguments, this is still invoked.
2908 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope);
2910 /// ActOnBlockError - If there is an error parsing a block, this callback
2911 /// is invoked to pop the information about the block from the action impl.
2912 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope);
2914 /// ActOnBlockStmtExpr - This is called when the body of a block statement
2915 /// literal was successfully completed. ^(int x){...}
2916 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body,
2919 //===---------------------------- OpenCL Features -----------------------===//
2921 /// __builtin_astype(...)
2922 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
2923 SourceLocation BuiltinLoc,
2924 SourceLocation RParenLoc);
2926 //===---------------------------- C++ Features --------------------------===//
2928 // Act on C++ namespaces
2929 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc,
2930 SourceLocation NamespaceLoc,
2931 SourceLocation IdentLoc,
2932 IdentifierInfo *Ident,
2933 SourceLocation LBrace,
2934 AttributeList *AttrList);
2935 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace);
2937 NamespaceDecl *getStdNamespace() const;
2938 NamespaceDecl *getOrCreateStdNamespace();
2940 CXXRecordDecl *getStdBadAlloc() const;
2942 /// \brief Tests whether Ty is an instance of std::initializer_list and, if
2943 /// it is and Element is not NULL, assigns the element type to Element.
2944 bool isStdInitializerList(QualType Ty, QualType *Element);
2946 /// \brief Looks for the std::initializer_list template and instantiates it
2947 /// with Element, or emits an error if it's not found.
2949 /// \returns The instantiated template, or null on error.
2950 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc);
2952 /// \brief Determine whether Ctor is an initializer-list constructor, as
2953 /// defined in [dcl.init.list]p2.
2954 bool isInitListConstructor(const CXXConstructorDecl *Ctor);
2956 Decl *ActOnUsingDirective(Scope *CurScope,
2957 SourceLocation UsingLoc,
2958 SourceLocation NamespcLoc,
2960 SourceLocation IdentLoc,
2961 IdentifierInfo *NamespcName,
2962 AttributeList *AttrList);
2964 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir);
2966 Decl *ActOnNamespaceAliasDef(Scope *CurScope,
2967 SourceLocation NamespaceLoc,
2968 SourceLocation AliasLoc,
2969 IdentifierInfo *Alias,
2971 SourceLocation IdentLoc,
2972 IdentifierInfo *Ident);
2974 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow);
2975 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target,
2976 const LookupResult &PreviousDecls);
2977 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD,
2980 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
2982 const CXXScopeSpec &SS,
2983 SourceLocation NameLoc,
2984 const LookupResult &Previous);
2985 bool CheckUsingDeclQualifier(SourceLocation UsingLoc,
2986 const CXXScopeSpec &SS,
2987 SourceLocation NameLoc);
2989 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
2990 SourceLocation UsingLoc,
2992 const DeclarationNameInfo &NameInfo,
2993 AttributeList *AttrList,
2994 bool IsInstantiation,
2996 SourceLocation TypenameLoc);
2998 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD);
3000 Decl *ActOnUsingDeclaration(Scope *CurScope,
3002 bool HasUsingKeyword,
3003 SourceLocation UsingLoc,
3005 UnqualifiedId &Name,
3006 AttributeList *AttrList,
3008 SourceLocation TypenameLoc);
3009 Decl *ActOnAliasDeclaration(Scope *CurScope,
3011 MultiTemplateParamsArg TemplateParams,
3012 SourceLocation UsingLoc,
3013 UnqualifiedId &Name,
3016 /// InitializeVarWithConstructor - Creates an CXXConstructExpr
3017 /// and sets it as the initializer for the the passed in VarDecl.
3018 bool InitializeVarWithConstructor(VarDecl *VD,
3019 CXXConstructorDecl *Constructor,
3021 bool HadMultipleCandidates);
3023 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
3024 /// including handling of its default argument expressions.
3026 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind
3028 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3029 CXXConstructorDecl *Constructor, MultiExprArg Exprs,
3030 bool HadMultipleCandidates, bool RequiresZeroInit,
3031 unsigned ConstructKind, SourceRange ParenRange);
3033 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if
3034 // the constructor can be elidable?
3036 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
3037 CXXConstructorDecl *Constructor, bool Elidable,
3038 MultiExprArg Exprs, bool HadMultipleCandidates,
3039 bool RequiresZeroInit, unsigned ConstructKind,
3040 SourceRange ParenRange);
3042 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
3043 /// the default expr if needed.
3044 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
3046 ParmVarDecl *Param);
3048 /// FinalizeVarWithDestructor - Prepare for calling destructor on the
3049 /// constructed variable.
3050 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType);
3052 /// \brief Helper class that collects exception specifications for
3053 /// implicitly-declared special member functions.
3054 class ImplicitExceptionSpecification {
3055 // Pointer to allow copying
3057 // We order exception specifications thus:
3058 // noexcept is the most restrictive, but is only used in C++0x.
3059 // throw() comes next.
3060 // Then a throw(collected exceptions)
3061 // Finally no specification.
3062 // throw(...) is used instead if any called function uses it.
3064 // If this exception specification cannot be known yet (for instance,
3065 // because this is the exception specification for a defaulted default
3066 // constructor and we haven't finished parsing the deferred parts of the
3067 // class yet), the C++0x standard does not specify how to behave. We
3068 // record this as an 'unknown' exception specification, which overrules
3069 // any other specification (even 'none', to keep this rule simple).
3070 ExceptionSpecificationType ComputedEST;
3071 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen;
3072 SmallVector<QualType, 4> Exceptions;
3074 void ClearExceptions() {
3075 ExceptionsSeen.clear();
3080 explicit ImplicitExceptionSpecification(Sema &Self)
3081 : Self(&Self), ComputedEST(EST_BasicNoexcept) {
3082 if (!Self.Context.getLangOpts().CPlusPlus0x)
3083 ComputedEST = EST_DynamicNone;
3086 /// \brief Get the computed exception specification type.
3087 ExceptionSpecificationType getExceptionSpecType() const {
3088 assert(ComputedEST != EST_ComputedNoexcept &&
3089 "noexcept(expr) should not be a possible result");
3093 /// \brief The number of exceptions in the exception specification.
3094 unsigned size() const { return Exceptions.size(); }
3096 /// \brief The set of exceptions in the exception specification.
3097 const QualType *data() const { return Exceptions.data(); }
3099 /// \brief Integrate another called method into the collected data.
3100 void CalledDecl(SourceLocation CallLoc, CXXMethodDecl *Method);
3102 /// \brief Integrate an invoked expression into the collected data.
3103 void CalledExpr(Expr *E);
3105 /// \brief Specify that the exception specification can't be detemined yet.
3108 ComputedEST = EST_Delayed;
3111 FunctionProtoType::ExtProtoInfo getEPI() const {
3112 FunctionProtoType::ExtProtoInfo EPI;
3113 EPI.ExceptionSpecType = getExceptionSpecType();
3114 EPI.NumExceptions = size();
3115 EPI.Exceptions = data();
3120 /// \brief Determine what sort of exception specification a defaulted
3121 /// copy constructor of a class will have.
3122 ImplicitExceptionSpecification
3123 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl);
3125 /// \brief Determine what sort of exception specification a defaulted
3126 /// default constructor of a class will have, and whether the parameter
3128 std::pair<ImplicitExceptionSpecification, bool>
3129 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl);
3131 /// \brief Determine what sort of exception specification a defautled
3132 /// copy assignment operator of a class will have, and whether the
3133 /// parameter will be const.
3134 std::pair<ImplicitExceptionSpecification, bool>
3135 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl);
3137 /// \brief Determine what sort of exception specification a defaulted move
3138 /// constructor of a class will have.
3139 ImplicitExceptionSpecification
3140 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl);
3142 /// \brief Determine what sort of exception specification a defaulted move
3143 /// assignment operator of a class will have.
3144 ImplicitExceptionSpecification
3145 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl);
3147 /// \brief Determine what sort of exception specification a defaulted
3148 /// destructor of a class will have.
3149 ImplicitExceptionSpecification
3150 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl);
3152 /// \brief Check the given exception-specification and update the
3153 /// extended prototype information with the results.
3154 void checkExceptionSpecification(ExceptionSpecificationType EST,
3155 ArrayRef<ParsedType> DynamicExceptions,
3156 ArrayRef<SourceRange> DynamicExceptionRanges,
3158 llvm::SmallVectorImpl<QualType> &Exceptions,
3159 FunctionProtoType::ExtProtoInfo &EPI);
3161 /// \brief Add an exception-specification to the given member function
3162 /// (or member function template). The exception-specification was parsed
3163 /// after the method itself was declared.
3164 void actOnDelayedExceptionSpecification(Decl *Method,
3165 ExceptionSpecificationType EST,
3166 SourceRange SpecificationRange,
3167 ArrayRef<ParsedType> DynamicExceptions,
3168 ArrayRef<SourceRange> DynamicExceptionRanges,
3169 Expr *NoexceptExpr);
3171 /// \brief Determine if a special member function should have a deleted
3172 /// definition when it is defaulted.
3173 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
3174 bool Diagnose = false);
3176 /// \brief Declare the implicit default constructor for the given class.
3178 /// \param ClassDecl The class declaration into which the implicit
3179 /// default constructor will be added.
3181 /// \returns The implicitly-declared default constructor.
3182 CXXConstructorDecl *DeclareImplicitDefaultConstructor(
3183 CXXRecordDecl *ClassDecl);
3185 /// DefineImplicitDefaultConstructor - Checks for feasibility of
3186 /// defining this constructor as the default constructor.
3187 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
3188 CXXConstructorDecl *Constructor);
3190 /// \brief Declare the implicit destructor for the given class.
3192 /// \param ClassDecl The class declaration into which the implicit
3193 /// destructor will be added.
3195 /// \returns The implicitly-declared destructor.
3196 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl);
3198 /// DefineImplicitDestructor - Checks for feasibility of
3199 /// defining this destructor as the default destructor.
3200 void DefineImplicitDestructor(SourceLocation CurrentLocation,
3201 CXXDestructorDecl *Destructor);
3203 /// \brief Build an exception spec for destructors that don't have one.
3205 /// C++11 says that user-defined destructors with no exception spec get one
3206 /// that looks as if the destructor was implicitly declared.
3207 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
3208 CXXDestructorDecl *Destructor);
3210 /// \brief Declare all inherited constructors for the given class.
3212 /// \param ClassDecl The class declaration into which the inherited
3213 /// constructors will be added.
3214 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl);
3216 /// \brief Declare the implicit copy constructor for the given class.
3218 /// \param ClassDecl The class declaration into which the implicit
3219 /// copy constructor will be added.
3221 /// \returns The implicitly-declared copy constructor.
3222 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl);
3224 /// DefineImplicitCopyConstructor - Checks for feasibility of
3225 /// defining this constructor as the copy constructor.
3226 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
3227 CXXConstructorDecl *Constructor);
3229 /// \brief Declare the implicit move constructor for the given class.
3231 /// \param ClassDecl The Class declaration into which the implicit
3232 /// move constructor will be added.
3234 /// \returns The implicitly-declared move constructor, or NULL if it wasn't
3236 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl);
3238 /// DefineImplicitMoveConstructor - Checks for feasibility of
3239 /// defining this constructor as the move constructor.
3240 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
3241 CXXConstructorDecl *Constructor);
3243 /// \brief Declare the implicit copy assignment operator for the given class.
3245 /// \param ClassDecl The class declaration into which the implicit
3246 /// copy assignment operator will be added.
3248 /// \returns The implicitly-declared copy assignment operator.
3249 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl);
3251 /// \brief Defines an implicitly-declared copy assignment operator.
3252 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
3253 CXXMethodDecl *MethodDecl);
3255 /// \brief Declare the implicit move assignment operator for the given class.
3257 /// \param ClassDecl The Class declaration into which the implicit
3258 /// move assignment operator will be added.
3260 /// \returns The implicitly-declared move assignment operator, or NULL if it
3261 /// wasn't declared.
3262 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl);
3264 /// \brief Defines an implicitly-declared move assignment operator.
3265 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
3266 CXXMethodDecl *MethodDecl);
3268 /// \brief Force the declaration of any implicitly-declared members of this
3270 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class);
3272 /// \brief Determine whether the given function is an implicitly-deleted
3273 /// special member function.
3274 bool isImplicitlyDeleted(FunctionDecl *FD);
3276 /// \brief Check whether 'this' shows up in the type of a static member
3277 /// function after the (naturally empty) cv-qualifier-seq would be.
3279 /// \returns true if an error occurred.
3280 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method);
3282 /// \brief Whether this' shows up in the exception specification of a static
3283 /// member function.
3284 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method);
3286 /// \brief Check whether 'this' shows up in the attributes of the given
3287 /// static member function.
3289 /// \returns true if an error occurred.
3290 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method);
3292 /// MaybeBindToTemporary - If the passed in expression has a record type with
3293 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise
3294 /// it simply returns the passed in expression.
3295 ExprResult MaybeBindToTemporary(Expr *E);
3297 bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
3298 MultiExprArg ArgsPtr,
3300 ASTOwningVector<Expr*> &ConvertedArgs,
3301 bool AllowExplicit = false);
3303 ParsedType getDestructorName(SourceLocation TildeLoc,
3304 IdentifierInfo &II, SourceLocation NameLoc,
3305 Scope *S, CXXScopeSpec &SS,
3306 ParsedType ObjectType,
3307 bool EnteringContext);
3309 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType);
3311 // Checks that reinterpret casts don't have undefined behavior.
3312 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType,
3313 bool IsDereference, SourceRange Range);
3315 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
3316 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc,
3317 tok::TokenKind Kind,
3318 SourceLocation LAngleBracketLoc,
3320 SourceLocation RAngleBracketLoc,
3321 SourceLocation LParenLoc,
3323 SourceLocation RParenLoc);
3325 ExprResult BuildCXXNamedCast(SourceLocation OpLoc,
3326 tok::TokenKind Kind,
3329 SourceRange AngleBrackets,
3330 SourceRange Parens);
3332 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3333 SourceLocation TypeidLoc,
3334 TypeSourceInfo *Operand,
3335 SourceLocation RParenLoc);
3336 ExprResult BuildCXXTypeId(QualType TypeInfoType,
3337 SourceLocation TypeidLoc,
3339 SourceLocation RParenLoc);
3341 /// ActOnCXXTypeid - Parse typeid( something ).
3342 ExprResult ActOnCXXTypeid(SourceLocation OpLoc,
3343 SourceLocation LParenLoc, bool isType,
3345 SourceLocation RParenLoc);
3347 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3348 SourceLocation TypeidLoc,
3349 TypeSourceInfo *Operand,
3350 SourceLocation RParenLoc);
3351 ExprResult BuildCXXUuidof(QualType TypeInfoType,
3352 SourceLocation TypeidLoc,
3354 SourceLocation RParenLoc);
3356 /// ActOnCXXUuidof - Parse __uuidof( something ).
3357 ExprResult ActOnCXXUuidof(SourceLocation OpLoc,
3358 SourceLocation LParenLoc, bool isType,
3360 SourceLocation RParenLoc);
3363 //// ActOnCXXThis - Parse 'this' pointer.
3364 ExprResult ActOnCXXThis(SourceLocation loc);
3366 /// \brief Try to retrieve the type of the 'this' pointer.
3368 /// \param Capture If true, capture 'this' in this context.
3370 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type.
3371 QualType getCurrentThisType();
3373 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the
3374 /// current context not being a non-static member function. In such cases,
3375 /// this provides the type used for 'this'.
3376 QualType CXXThisTypeOverride;
3378 /// \brief RAII object used to temporarily allow the C++ 'this' expression
3379 /// to be used, with the given qualifiers on the current class type.
3380 class CXXThisScopeRAII {
3382 QualType OldCXXThisTypeOverride;
3386 /// \brief Introduce a new scope where 'this' may be allowed (when enabled),
3387 /// using the given declaration (which is either a class template or a
3388 /// class) along with the given qualifiers.
3389 /// along with the qualifiers placed on '*this'.
3390 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals,
3391 bool Enabled = true);
3393 ~CXXThisScopeRAII();
3396 /// \brief Make sure the value of 'this' is actually available in the current
3397 /// context, if it is a potentially evaluated context.
3399 /// \param Loc The location at which the capture of 'this' occurs.
3401 /// \param Explicit Whether 'this' is explicitly captured in a lambda
3403 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false);
3405 /// \brief Determine whether the given type is the type of *this that is used
3406 /// outside of the body of a member function for a type that is currently
3408 bool isThisOutsideMemberFunctionBody(QualType BaseType);
3410 /// ActOnCXXBoolLiteral - Parse {true,false} literals.
3411 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3414 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
3415 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
3417 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
3418 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc);
3420 //// ActOnCXXThrow - Parse throw expressions.
3421 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr);
3422 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
3423 bool IsThrownVarInScope);
3424 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E,
3425 bool IsThrownVarInScope);
3427 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
3428 /// Can be interpreted either as function-style casting ("int(x)")
3429 /// or class type construction ("ClassType(x,y,z)")
3430 /// or creation of a value-initialized type ("int()").
3431 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep,
3432 SourceLocation LParenLoc,
3434 SourceLocation RParenLoc);
3436 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type,
3437 SourceLocation LParenLoc,
3439 SourceLocation RParenLoc);
3441 /// ActOnCXXNew - Parsed a C++ 'new' expression.
3442 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
3443 SourceLocation PlacementLParen,
3444 MultiExprArg PlacementArgs,
3445 SourceLocation PlacementRParen,
3446 SourceRange TypeIdParens, Declarator &D,
3448 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
3449 SourceLocation PlacementLParen,
3450 MultiExprArg PlacementArgs,
3451 SourceLocation PlacementRParen,
3452 SourceRange TypeIdParens,
3454 TypeSourceInfo *AllocTypeInfo,
3456 SourceRange DirectInitRange,
3458 bool TypeMayContainAuto = true);
3460 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc,
3462 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
3463 bool UseGlobal, QualType AllocType, bool IsArray,
3464 Expr **PlaceArgs, unsigned NumPlaceArgs,
3465 FunctionDecl *&OperatorNew,
3466 FunctionDecl *&OperatorDelete);
3467 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range,
3468 DeclarationName Name, Expr** Args,
3469 unsigned NumArgs, DeclContext *Ctx,
3470 bool AllowMissing, FunctionDecl *&Operator,
3471 bool Diagnose = true);
3472 void DeclareGlobalNewDelete();
3473 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return,
3475 bool addMallocAttr = false);
3477 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
3478 DeclarationName Name, FunctionDecl* &Operator,
3479 bool Diagnose = true);
3481 /// ActOnCXXDelete - Parsed a C++ 'delete' expression
3482 ExprResult ActOnCXXDelete(SourceLocation StartLoc,
3483 bool UseGlobal, bool ArrayForm,
3486 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D);
3487 ExprResult CheckConditionVariable(VarDecl *ConditionVar,
3488 SourceLocation StmtLoc,
3489 bool ConvertToBoolean);
3491 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen,
3492 Expr *Operand, SourceLocation RParen);
3493 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
3494 SourceLocation RParen);
3496 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support
3497 /// pseudo-functions.
3498 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT,
3499 SourceLocation KWLoc,
3501 SourceLocation RParen);
3503 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT,
3504 SourceLocation KWLoc,
3506 SourceLocation RParen);
3508 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support
3509 /// pseudo-functions.
3510 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT,
3511 SourceLocation KWLoc,
3514 SourceLocation RParen);
3516 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT,
3517 SourceLocation KWLoc,
3518 TypeSourceInfo *LhsT,
3519 TypeSourceInfo *RhsT,
3520 SourceLocation RParen);
3522 /// \brief Parsed one of the type trait support pseudo-functions.
3523 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3524 ArrayRef<ParsedType> Args,
3525 SourceLocation RParenLoc);
3526 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
3527 ArrayRef<TypeSourceInfo *> Args,
3528 SourceLocation RParenLoc);
3530 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support
3531 /// pseudo-functions.
3532 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT,
3533 SourceLocation KWLoc,
3536 SourceLocation RParen);
3538 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT,
3539 SourceLocation KWLoc,
3540 TypeSourceInfo *TSInfo,
3542 SourceLocation RParen);
3544 /// ActOnExpressionTrait - Parsed one of the unary type trait support
3545 /// pseudo-functions.
3546 ExprResult ActOnExpressionTrait(ExpressionTrait OET,
3547 SourceLocation KWLoc,
3549 SourceLocation RParen);
3551 ExprResult BuildExpressionTrait(ExpressionTrait OET,
3552 SourceLocation KWLoc,
3554 SourceLocation RParen);
3556 ExprResult ActOnStartCXXMemberReference(Scope *S,
3558 SourceLocation OpLoc,
3559 tok::TokenKind OpKind,
3560 ParsedType &ObjectType,
3561 bool &MayBePseudoDestructor);
3563 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr);
3565 ExprResult BuildPseudoDestructorExpr(Expr *Base,
3566 SourceLocation OpLoc,
3567 tok::TokenKind OpKind,
3568 const CXXScopeSpec &SS,
3569 TypeSourceInfo *ScopeType,
3570 SourceLocation CCLoc,
3571 SourceLocation TildeLoc,
3572 PseudoDestructorTypeStorage DestroyedType,
3573 bool HasTrailingLParen);
3575 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3576 SourceLocation OpLoc,
3577 tok::TokenKind OpKind,
3579 UnqualifiedId &FirstTypeName,
3580 SourceLocation CCLoc,
3581 SourceLocation TildeLoc,
3582 UnqualifiedId &SecondTypeName,
3583 bool HasTrailingLParen);
3585 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
3586 SourceLocation OpLoc,
3587 tok::TokenKind OpKind,
3588 SourceLocation TildeLoc,
3590 bool HasTrailingLParen);
3592 /// MaybeCreateExprWithCleanups - If the current full-expression
3593 /// requires any cleanups, surround it with a ExprWithCleanups node.
3594 /// Otherwise, just returns the passed-in expression.
3595 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr);
3596 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt);
3597 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr);
3599 ExprResult ActOnFinishFullExpr(Expr *Expr);
3600 StmtResult ActOnFinishFullStmt(Stmt *Stmt);
3602 // Marks SS invalid if it represents an incomplete type.
3603 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC);
3605 DeclContext *computeDeclContext(QualType T);
3606 DeclContext *computeDeclContext(const CXXScopeSpec &SS,
3607 bool EnteringContext = false);
3608 bool isDependentScopeSpecifier(const CXXScopeSpec &SS);
3609 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS);
3610 bool isUnknownSpecialization(const CXXScopeSpec &SS);
3612 /// \brief The parser has parsed a global nested-name-specifier '::'.
3614 /// \param S The scope in which this nested-name-specifier occurs.
3616 /// \param CCLoc The location of the '::'.
3618 /// \param SS The nested-name-specifier, which will be updated in-place
3619 /// to reflect the parsed nested-name-specifier.
3621 /// \returns true if an error occurred, false otherwise.
3622 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc,
3625 bool isAcceptableNestedNameSpecifier(NamedDecl *SD);
3626 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
3628 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
3629 SourceLocation IdLoc,
3631 ParsedType ObjectType);
3633 bool BuildCXXNestedNameSpecifier(Scope *S,
3634 IdentifierInfo &Identifier,
3635 SourceLocation IdentifierLoc,
3636 SourceLocation CCLoc,
3637 QualType ObjectType,
3638 bool EnteringContext,
3640 NamedDecl *ScopeLookupResult,
3641 bool ErrorRecoveryLookup);
3643 /// \brief The parser has parsed a nested-name-specifier 'identifier::'.
3645 /// \param S The scope in which this nested-name-specifier occurs.
3647 /// \param Identifier The identifier preceding the '::'.
3649 /// \param IdentifierLoc The location of the identifier.
3651 /// \param CCLoc The location of the '::'.
3653 /// \param ObjectType The type of the object, if we're parsing
3654 /// nested-name-specifier in a member access expression.
3656 /// \param EnteringContext Whether we're entering the context nominated by
3657 /// this nested-name-specifier.
3659 /// \param SS The nested-name-specifier, which is both an input
3660 /// parameter (the nested-name-specifier before this type) and an
3661 /// output parameter (containing the full nested-name-specifier,
3662 /// including this new type).
3664 /// \returns true if an error occurred, false otherwise.
3665 bool ActOnCXXNestedNameSpecifier(Scope *S,
3666 IdentifierInfo &Identifier,
3667 SourceLocation IdentifierLoc,
3668 SourceLocation CCLoc,
3669 ParsedType ObjectType,
3670 bool EnteringContext,
3673 ExprResult ActOnDecltypeExpression(Expr *E);
3675 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS,
3677 SourceLocation ColonColonLoc);
3679 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS,
3680 IdentifierInfo &Identifier,
3681 SourceLocation IdentifierLoc,
3682 SourceLocation ColonLoc,
3683 ParsedType ObjectType,
3684 bool EnteringContext);
3686 /// \brief The parser has parsed a nested-name-specifier
3687 /// 'template[opt] template-name < template-args >::'.
3689 /// \param S The scope in which this nested-name-specifier occurs.
3691 /// \param SS The nested-name-specifier, which is both an input
3692 /// parameter (the nested-name-specifier before this type) and an
3693 /// output parameter (containing the full nested-name-specifier,
3694 /// including this new type).
3696 /// \param TemplateKWLoc the location of the 'template' keyword, if any.
3697 /// \param TemplateName The template name.
3698 /// \param TemplateNameLoc The location of the template name.
3699 /// \param LAngleLoc The location of the opening angle bracket ('<').
3700 /// \param TemplateArgs The template arguments.
3701 /// \param RAngleLoc The location of the closing angle bracket ('>').
3702 /// \param CCLoc The location of the '::'.
3704 /// \param EnteringContext Whether we're entering the context of the
3705 /// nested-name-specifier.
3708 /// \returns true if an error occurred, false otherwise.
3709 bool ActOnCXXNestedNameSpecifier(Scope *S,
3711 SourceLocation TemplateKWLoc,
3712 TemplateTy Template,
3713 SourceLocation TemplateNameLoc,
3714 SourceLocation LAngleLoc,
3715 ASTTemplateArgsPtr TemplateArgs,
3716 SourceLocation RAngleLoc,
3717 SourceLocation CCLoc,
3718 bool EnteringContext);
3720 /// \brief Given a C++ nested-name-specifier, produce an annotation value
3721 /// that the parser can use later to reconstruct the given
3722 /// nested-name-specifier.
3724 /// \param SS A nested-name-specifier.
3726 /// \returns A pointer containing all of the information in the
3727 /// nested-name-specifier \p SS.
3728 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS);
3730 /// \brief Given an annotation pointer for a nested-name-specifier, restore
3731 /// the nested-name-specifier structure.
3733 /// \param Annotation The annotation pointer, produced by
3734 /// \c SaveNestedNameSpecifierAnnotation().
3736 /// \param AnnotationRange The source range corresponding to the annotation.
3738 /// \param SS The nested-name-specifier that will be updated with the contents
3739 /// of the annotation pointer.
3740 void RestoreNestedNameSpecifierAnnotation(void *Annotation,
3741 SourceRange AnnotationRange,
3744 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
3746 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global
3747 /// scope or nested-name-specifier) is parsed, part of a declarator-id.
3748 /// After this method is called, according to [C++ 3.4.3p3], names should be
3749 /// looked up in the declarator-id's scope, until the declarator is parsed and
3750 /// ActOnCXXExitDeclaratorScope is called.
3751 /// The 'SS' should be a non-empty valid CXXScopeSpec.
3752 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS);
3754 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously
3755 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same
3756 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well.
3757 /// Used to indicate that names should revert to being looked up in the
3759 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
3761 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an
3762 /// initializer for the declaration 'Dcl'.
3763 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a
3764 /// static data member of class X, names should be looked up in the scope of
3766 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl);
3768 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an
3769 /// initializer for the declaration 'Dcl'.
3770 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl);
3772 /// \brief Create a new lambda closure type.
3773 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange,
3774 bool KnownDependent = false);
3776 /// \brief Start the definition of a lambda expression.
3777 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class,
3778 SourceRange IntroducerRange,
3779 TypeSourceInfo *MethodType,
3780 SourceLocation EndLoc,
3781 llvm::ArrayRef<ParmVarDecl *> Params,
3782 llvm::Optional<unsigned> ManglingNumber
3783 = llvm::Optional<unsigned>(),
3784 Decl *ContextDecl = 0);
3786 /// \brief Introduce the scope for a lambda expression.
3787 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator,
3788 SourceRange IntroducerRange,
3789 LambdaCaptureDefault CaptureDefault,
3790 bool ExplicitParams,
3791 bool ExplicitResultType,
3794 /// \brief Note that we have finished the explicit captures for the
3796 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI);
3798 /// \brief Introduce the lambda parameters into scope.
3799 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope);
3801 /// ActOnStartOfLambdaDefinition - This is called just before we start
3802 /// parsing the body of a lambda; it analyzes the explicit captures and
3803 /// arguments, and sets up various data-structures for the body of the
3805 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
3806 Declarator &ParamInfo, Scope *CurScope);
3808 /// ActOnLambdaError - If there is an error parsing a lambda, this callback
3809 /// is invoked to pop the information about the lambda.
3810 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
3811 bool IsInstantiation = false);
3813 /// ActOnLambdaExpr - This is called when the body of a lambda expression
3814 /// was successfully completed.
3815 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
3817 bool IsInstantiation = false);
3819 /// \brief Define the "body" of the conversion from a lambda object to a
3820 /// function pointer.
3822 /// This routine doesn't actually define a sensible body; rather, it fills
3823 /// in the initialization expression needed to copy the lambda object into
3824 /// the block, and IR generation actually generates the real body of the
3825 /// block pointer conversion.
3826 void DefineImplicitLambdaToFunctionPointerConversion(
3827 SourceLocation CurrentLoc, CXXConversionDecl *Conv);
3829 /// \brief Define the "body" of the conversion from a lambda object to a
3832 /// This routine doesn't actually define a sensible body; rather, it fills
3833 /// in the initialization expression needed to copy the lambda object into
3834 /// the block, and IR generation actually generates the real body of the
3835 /// block pointer conversion.
3836 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc,
3837 CXXConversionDecl *Conv);
3839 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation,
3840 SourceLocation ConvLocation,
3841 CXXConversionDecl *Conv,
3844 // ParseObjCStringLiteral - Parse Objective-C string literals.
3845 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
3847 unsigned NumStrings);
3849 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S);
3851 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the
3852 /// numeric literal expression. Type of the expression will be "NSNumber *"
3853 /// or "id" if NSNumber is unavailable.
3854 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number);
3855 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc,
3857 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements);
3859 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr,
3861 ObjCMethodDecl *getterMethod,
3862 ObjCMethodDecl *setterMethod);
3864 ExprResult BuildObjCDictionaryLiteral(SourceRange SR,
3865 ObjCDictionaryElement *Elements,
3866 unsigned NumElements);
3868 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc,
3869 TypeSourceInfo *EncodedTypeInfo,
3870 SourceLocation RParenLoc);
3871 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl,
3872 CXXConversionDecl *Method,
3873 bool HadMultipleCandidates);
3875 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc,
3876 SourceLocation EncodeLoc,
3877 SourceLocation LParenLoc,
3879 SourceLocation RParenLoc);
3881 // ParseObjCSelectorExpression - Build selector expression for @selector
3882 ExprResult ParseObjCSelectorExpression(Selector Sel,
3883 SourceLocation AtLoc,
3884 SourceLocation SelLoc,
3885 SourceLocation LParenLoc,
3886 SourceLocation RParenLoc);
3888 // ParseObjCProtocolExpression - Build protocol expression for @protocol
3889 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName,
3890 SourceLocation AtLoc,
3891 SourceLocation ProtoLoc,
3892 SourceLocation LParenLoc,
3893 SourceLocation RParenLoc);
3895 //===--------------------------------------------------------------------===//
3898 Decl *ActOnStartLinkageSpecification(Scope *S,
3899 SourceLocation ExternLoc,
3900 SourceLocation LangLoc,
3902 SourceLocation LBraceLoc);
3903 Decl *ActOnFinishLinkageSpecification(Scope *S,
3905 SourceLocation RBraceLoc);
3908 //===--------------------------------------------------------------------===//
3911 bool isCurrentClassName(const IdentifierInfo &II, Scope *S,
3912 const CXXScopeSpec *SS = 0);
3914 bool ActOnAccessSpecifier(AccessSpecifier Access,
3915 SourceLocation ASLoc,
3916 SourceLocation ColonLoc,
3917 AttributeList *Attrs = 0);
3919 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
3921 MultiTemplateParamsArg TemplateParameterLists,
3922 Expr *BitfieldWidth, const VirtSpecifiers &VS,
3923 bool HasDeferredInit);
3924 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc,
3927 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
3930 IdentifierInfo *MemberOrBase,
3931 ParsedType TemplateTypeTy,
3933 SourceLocation IdLoc,
3934 SourceLocation LParenLoc,
3935 Expr **Args, unsigned NumArgs,
3936 SourceLocation RParenLoc,
3937 SourceLocation EllipsisLoc);
3939 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
3942 IdentifierInfo *MemberOrBase,
3943 ParsedType TemplateTypeTy,
3945 SourceLocation IdLoc,
3947 SourceLocation EllipsisLoc);
3949 MemInitResult BuildMemInitializer(Decl *ConstructorD,
3952 IdentifierInfo *MemberOrBase,
3953 ParsedType TemplateTypeTy,
3955 SourceLocation IdLoc,
3957 SourceLocation EllipsisLoc);
3959 MemInitResult BuildMemberInitializer(ValueDecl *Member,
3961 SourceLocation IdLoc);
3963 MemInitResult BuildBaseInitializer(QualType BaseType,
3964 TypeSourceInfo *BaseTInfo,
3966 CXXRecordDecl *ClassDecl,
3967 SourceLocation EllipsisLoc);
3969 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo,
3971 CXXRecordDecl *ClassDecl);
3973 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor,
3974 CXXCtorInitializer *Initializer);
3976 bool SetCtorInitializers(CXXConstructorDecl *Constructor,
3977 CXXCtorInitializer **Initializers,
3978 unsigned NumInitializers, bool AnyErrors);
3980 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation);
3983 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl,
3984 /// mark all the non-trivial destructors of its members and bases as
3986 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc,
3987 CXXRecordDecl *Record);
3989 /// \brief The list of classes whose vtables have been used within
3990 /// this translation unit, and the source locations at which the
3991 /// first use occurred.
3992 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse;
3994 /// \brief The list of vtables that are required but have not yet been
3996 SmallVector<VTableUse, 16> VTableUses;
3998 /// \brief The set of classes whose vtables have been used within
3999 /// this translation unit, and a bit that will be true if the vtable is
4000 /// required to be emitted (otherwise, it should be emitted only if needed
4001 /// by code generation).
4002 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed;
4004 /// \brief Load any externally-stored vtable uses.
4005 void LoadExternalVTableUses();
4007 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource,
4008 &ExternalSemaSource::ReadDynamicClasses, 2, 2>
4011 /// \brief A list of all of the dynamic classes in this translation
4013 DynamicClassesType DynamicClasses;
4015 /// \brief Note that the vtable for the given class was used at the
4017 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class,
4018 bool DefinitionRequired = false);
4020 /// MarkVirtualMembersReferenced - Will mark all members of the given
4021 /// CXXRecordDecl referenced.
4022 void MarkVirtualMembersReferenced(SourceLocation Loc,
4023 const CXXRecordDecl *RD);
4025 /// \brief Define all of the vtables that have been used in this
4026 /// translation unit and reference any virtual members used by those
4029 /// \returns true if any work was done, false otherwise.
4030 bool DefineUsedVTables();
4032 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl);
4034 void ActOnMemInitializers(Decl *ConstructorDecl,
4035 SourceLocation ColonLoc,
4036 CXXCtorInitializer **MemInits,
4037 unsigned NumMemInits,
4040 void CheckCompletedCXXClass(CXXRecordDecl *Record);
4041 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc,
4043 SourceLocation LBrac,
4044 SourceLocation RBrac,
4045 AttributeList *AttrList);
4047 void ActOnReenterTemplateScope(Scope *S, Decl *Template);
4048 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D);
4049 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record);
4050 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4051 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param);
4052 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record);
4053 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
4054 void ActOnFinishDelayedMemberInitializers(Decl *Record);
4055 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true);
4056 bool IsInsideALocalClassWithinATemplateFunction();
4058 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc,
4060 Expr *AssertMessageExpr,
4061 SourceLocation RParenLoc);
4063 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc,
4064 SourceLocation FriendLoc,
4065 TypeSourceInfo *TSInfo);
4066 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
4067 MultiTemplateParamsArg TemplateParams);
4068 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
4069 MultiTemplateParamsArg TemplateParams);
4071 QualType CheckConstructorDeclarator(Declarator &D, QualType R,
4073 void CheckConstructor(CXXConstructorDecl *Constructor);
4074 QualType CheckDestructorDeclarator(Declarator &D, QualType R,
4076 bool CheckDestructor(CXXDestructorDecl *Destructor);
4077 void CheckConversionDeclarator(Declarator &D, QualType &R,
4079 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion);
4081 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record);
4082 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor);
4083 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor);
4084 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method);
4085 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor);
4086 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method);
4087 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor);
4089 //===--------------------------------------------------------------------===//
4090 // C++ Derived Classes
4093 /// ActOnBaseSpecifier - Parsed a base specifier
4094 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class,
4095 SourceRange SpecifierRange,
4096 bool Virtual, AccessSpecifier Access,
4097 TypeSourceInfo *TInfo,
4098 SourceLocation EllipsisLoc);
4100 BaseResult ActOnBaseSpecifier(Decl *classdecl,
4101 SourceRange SpecifierRange,
4102 bool Virtual, AccessSpecifier Access,
4103 ParsedType basetype,
4104 SourceLocation BaseLoc,
4105 SourceLocation EllipsisLoc);
4107 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases,
4109 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases,
4112 bool IsDerivedFrom(QualType Derived, QualType Base);
4113 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths);
4115 // FIXME: I don't like this name.
4116 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath);
4118 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath);
4120 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4121 SourceLocation Loc, SourceRange Range,
4122 CXXCastPath *BasePath = 0,
4123 bool IgnoreAccess = false);
4124 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
4125 unsigned InaccessibleBaseID,
4126 unsigned AmbigiousBaseConvID,
4127 SourceLocation Loc, SourceRange Range,
4128 DeclarationName Name,
4129 CXXCastPath *BasePath);
4131 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths);
4133 /// CheckOverridingFunctionReturnType - Checks whether the return types are
4134 /// covariant, according to C++ [class.virtual]p5.
4135 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
4136 const CXXMethodDecl *Old);
4138 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception
4139 /// spec is a subset of base spec.
4140 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New,
4141 const CXXMethodDecl *Old);
4143 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange);
4145 /// CheckOverrideControl - Check C++0x override control semantics.
4146 void CheckOverrideControl(const Decl *D);
4148 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function
4149 /// overrides a virtual member function marked 'final', according to
4150 /// C++0x [class.virtual]p3.
4151 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New,
4152 const CXXMethodDecl *Old);
4155 //===--------------------------------------------------------------------===//
4156 // C++ Access Control
4166 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl,
4167 NamedDecl *PrevMemberDecl,
4168 AccessSpecifier LexicalAS);
4170 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E,
4171 DeclAccessPair FoundDecl);
4172 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E,
4173 DeclAccessPair FoundDecl);
4174 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc,
4175 SourceRange PlacementRange,
4176 CXXRecordDecl *NamingClass,
4177 DeclAccessPair FoundDecl,
4178 bool Diagnose = true);
4179 AccessResult CheckConstructorAccess(SourceLocation Loc,
4180 CXXConstructorDecl *D,
4181 const InitializedEntity &Entity,
4182 AccessSpecifier Access,
4183 bool IsCopyBindingRefToTemp = false);
4184 AccessResult CheckConstructorAccess(SourceLocation Loc,
4185 CXXConstructorDecl *D,
4186 const InitializedEntity &Entity,
4187 AccessSpecifier Access,
4188 const PartialDiagnostic &PDiag);
4189 AccessResult CheckDestructorAccess(SourceLocation Loc,
4190 CXXDestructorDecl *Dtor,
4191 const PartialDiagnostic &PDiag,
4192 QualType objectType = QualType());
4193 AccessResult CheckDirectMemberAccess(SourceLocation Loc,
4195 const PartialDiagnostic &PDiag);
4196 AccessResult CheckMemberOperatorAccess(SourceLocation Loc,
4199 DeclAccessPair FoundDecl);
4200 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr,
4201 DeclAccessPair FoundDecl);
4202 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc,
4203 QualType Base, QualType Derived,
4204 const CXXBasePath &Path,
4206 bool ForceCheck = false,
4207 bool ForceUnprivileged = false);
4208 void CheckLookupAccess(const LookupResult &R);
4209 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx);
4210 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl,
4211 AccessSpecifier access,
4212 QualType objectType);
4214 void HandleDependentAccessCheck(const DependentDiagnostic &DD,
4215 const MultiLevelTemplateArgumentList &TemplateArgs);
4216 void PerformDependentDiagnostics(const DeclContext *Pattern,
4217 const MultiLevelTemplateArgumentList &TemplateArgs);
4219 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
4221 /// A flag to suppress access checking.
4222 bool SuppressAccessChecking;
4224 /// \brief When true, access checking violations are treated as SFINAE
4225 /// failures rather than hard errors.
4226 bool AccessCheckingSFINAE;
4228 /// \brief RAII object used to temporarily suppress access checking.
4229 class SuppressAccessChecksRAII {
4231 bool SuppressingAccess;
4234 SuppressAccessChecksRAII(Sema &S, bool Suppress)
4235 : S(S), SuppressingAccess(Suppress) {
4236 if (Suppress) S.ActOnStartSuppressingAccessChecks();
4238 ~SuppressAccessChecksRAII() {
4242 if (!SuppressingAccess) return;
4243 S.ActOnStopSuppressingAccessChecks();
4244 SuppressingAccess = false;
4248 void ActOnStartSuppressingAccessChecks();
4249 void ActOnStopSuppressingAccessChecks();
4251 enum AbstractDiagSelID {
4255 AbstractVariableType,
4260 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
4261 const PartialDiagnostic &PD);
4262 void DiagnoseAbstractType(const CXXRecordDecl *RD);
4264 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID,
4265 AbstractDiagSelID SelID = AbstractNone);
4267 //===--------------------------------------------------------------------===//
4268 // C++ Overloaded Operators [C++ 13.5]
4271 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl);
4273 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl);
4275 //===--------------------------------------------------------------------===//
4276 // C++ Templates [C++ 14]
4278 void FilterAcceptableTemplateNames(LookupResult &R,
4279 bool AllowFunctionTemplates = true);
4280 bool hasAnyAcceptableTemplateNames(LookupResult &R,
4281 bool AllowFunctionTemplates = true);
4283 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS,
4284 QualType ObjectType, bool EnteringContext,
4285 bool &MemberOfUnknownSpecialization);
4287 TemplateNameKind isTemplateName(Scope *S,
4289 bool hasTemplateKeyword,
4290 UnqualifiedId &Name,
4291 ParsedType ObjectType,
4292 bool EnteringContext,
4293 TemplateTy &Template,
4294 bool &MemberOfUnknownSpecialization);
4296 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II,
4297 SourceLocation IILoc,
4299 const CXXScopeSpec *SS,
4300 TemplateTy &SuggestedTemplate,
4301 TemplateNameKind &SuggestedKind);
4303 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl);
4304 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl);
4306 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis,
4307 SourceLocation EllipsisLoc,
4308 SourceLocation KeyLoc,
4309 IdentifierInfo *ParamName,
4310 SourceLocation ParamNameLoc,
4311 unsigned Depth, unsigned Position,
4312 SourceLocation EqualLoc,
4313 ParsedType DefaultArg);
4315 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc);
4316 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D,
4319 SourceLocation EqualLoc,
4321 Decl *ActOnTemplateTemplateParameter(Scope *S,
4322 SourceLocation TmpLoc,
4323 TemplateParameterList *Params,
4324 SourceLocation EllipsisLoc,
4325 IdentifierInfo *ParamName,
4326 SourceLocation ParamNameLoc,
4329 SourceLocation EqualLoc,
4330 ParsedTemplateArgument DefaultArg);
4332 TemplateParameterList *
4333 ActOnTemplateParameterList(unsigned Depth,
4334 SourceLocation ExportLoc,
4335 SourceLocation TemplateLoc,
4336 SourceLocation LAngleLoc,
4337 Decl **Params, unsigned NumParams,
4338 SourceLocation RAngleLoc);
4340 /// \brief The context in which we are checking a template parameter
4342 enum TemplateParamListContext {
4344 TPC_FunctionTemplate,
4345 TPC_ClassTemplateMember,
4346 TPC_FriendFunctionTemplate,
4347 TPC_FriendFunctionTemplateDefinition,
4348 TPC_TypeAliasTemplate
4351 bool CheckTemplateParameterList(TemplateParameterList *NewParams,
4352 TemplateParameterList *OldParams,
4353 TemplateParamListContext TPC);
4354 TemplateParameterList *
4355 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc,
4356 SourceLocation DeclLoc,
4357 const CXXScopeSpec &SS,
4358 TemplateParameterList **ParamLists,
4359 unsigned NumParamLists,
4361 bool &IsExplicitSpecialization,
4364 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
4365 SourceLocation KWLoc, CXXScopeSpec &SS,
4366 IdentifierInfo *Name, SourceLocation NameLoc,
4367 AttributeList *Attr,
4368 TemplateParameterList *TemplateParams,
4370 SourceLocation ModulePrivateLoc,
4371 unsigned NumOuterTemplateParamLists,
4372 TemplateParameterList **OuterTemplateParamLists);
4374 void translateTemplateArguments(const ASTTemplateArgsPtr &In,
4375 TemplateArgumentListInfo &Out);
4377 void NoteAllFoundTemplates(TemplateName Name);
4379 QualType CheckTemplateIdType(TemplateName Template,
4380 SourceLocation TemplateLoc,
4381 TemplateArgumentListInfo &TemplateArgs);
4384 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4385 TemplateTy Template, SourceLocation TemplateLoc,
4386 SourceLocation LAngleLoc,
4387 ASTTemplateArgsPtr TemplateArgs,
4388 SourceLocation RAngleLoc,
4389 bool IsCtorOrDtorName = false);
4391 /// \brief Parsed an elaborated-type-specifier that refers to a template-id,
4392 /// such as \c class T::template apply<U>.
4395 TypeResult ActOnTagTemplateIdType(TagUseKind TUK,
4396 TypeSpecifierType TagSpec,
4397 SourceLocation TagLoc,
4399 SourceLocation TemplateKWLoc,
4400 TemplateTy TemplateD,
4401 SourceLocation TemplateLoc,
4402 SourceLocation LAngleLoc,
4403 ASTTemplateArgsPtr TemplateArgsIn,
4404 SourceLocation RAngleLoc);
4407 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS,
4408 SourceLocation TemplateKWLoc,
4411 const TemplateArgumentListInfo *TemplateArgs);
4413 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS,
4414 SourceLocation TemplateKWLoc,
4415 const DeclarationNameInfo &NameInfo,
4416 const TemplateArgumentListInfo *TemplateArgs);
4418 TemplateNameKind ActOnDependentTemplateName(Scope *S,
4420 SourceLocation TemplateKWLoc,
4421 UnqualifiedId &Name,
4422 ParsedType ObjectType,
4423 bool EnteringContext,
4424 TemplateTy &Template);
4427 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK,
4428 SourceLocation KWLoc,
4429 SourceLocation ModulePrivateLoc,
4431 TemplateTy Template,
4432 SourceLocation TemplateNameLoc,
4433 SourceLocation LAngleLoc,
4434 ASTTemplateArgsPtr TemplateArgs,
4435 SourceLocation RAngleLoc,
4436 AttributeList *Attr,
4437 MultiTemplateParamsArg TemplateParameterLists);
4439 Decl *ActOnTemplateDeclarator(Scope *S,
4440 MultiTemplateParamsArg TemplateParameterLists,
4443 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope,
4444 MultiTemplateParamsArg TemplateParameterLists,
4448 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc,
4449 TemplateSpecializationKind NewTSK,
4450 NamedDecl *PrevDecl,
4451 TemplateSpecializationKind PrevTSK,
4452 SourceLocation PrevPtOfInstantiation,
4455 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD,
4456 const TemplateArgumentListInfo &ExplicitTemplateArgs,
4457 LookupResult &Previous);
4459 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD,
4460 TemplateArgumentListInfo *ExplicitTemplateArgs,
4461 LookupResult &Previous);
4462 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous);
4465 ActOnExplicitInstantiation(Scope *S,
4466 SourceLocation ExternLoc,
4467 SourceLocation TemplateLoc,
4469 SourceLocation KWLoc,
4470 const CXXScopeSpec &SS,
4471 TemplateTy Template,
4472 SourceLocation TemplateNameLoc,
4473 SourceLocation LAngleLoc,
4474 ASTTemplateArgsPtr TemplateArgs,
4475 SourceLocation RAngleLoc,
4476 AttributeList *Attr);
4479 ActOnExplicitInstantiation(Scope *S,
4480 SourceLocation ExternLoc,
4481 SourceLocation TemplateLoc,
4483 SourceLocation KWLoc,
4485 IdentifierInfo *Name,
4486 SourceLocation NameLoc,
4487 AttributeList *Attr);
4489 DeclResult ActOnExplicitInstantiation(Scope *S,
4490 SourceLocation ExternLoc,
4491 SourceLocation TemplateLoc,
4495 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
4496 SourceLocation TemplateLoc,
4497 SourceLocation RAngleLoc,
4499 SmallVectorImpl<TemplateArgument> &Converted);
4501 /// \brief Specifies the context in which a particular template
4502 /// argument is being checked.
4503 enum CheckTemplateArgumentKind {
4504 /// \brief The template argument was specified in the code or was
4505 /// instantiated with some deduced template arguments.
4508 /// \brief The template argument was deduced via template argument
4512 /// \brief The template argument was deduced from an array bound
4513 /// via template argument deduction.
4514 CTAK_DeducedFromArrayBound
4517 bool CheckTemplateArgument(NamedDecl *Param,
4518 const TemplateArgumentLoc &Arg,
4519 NamedDecl *Template,
4520 SourceLocation TemplateLoc,
4521 SourceLocation RAngleLoc,
4522 unsigned ArgumentPackIndex,
4523 SmallVectorImpl<TemplateArgument> &Converted,
4524 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4526 /// \brief Check that the given template arguments can be be provided to
4527 /// the given template, converting the arguments along the way.
4529 /// \param Template The template to which the template arguments are being
4532 /// \param TemplateLoc The location of the template name in the source.
4534 /// \param TemplateArgs The list of template arguments. If the template is
4535 /// a template template parameter, this function may extend the set of
4536 /// template arguments to also include substituted, defaulted template
4539 /// \param PartialTemplateArgs True if the list of template arguments is
4540 /// intentionally partial, e.g., because we're checking just the initial
4541 /// set of template arguments.
4543 /// \param Converted Will receive the converted, canonicalized template
4547 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate
4548 /// when the template arguments contain a pack expansion that is being
4549 /// expanded into a fixed parameter list.
4551 /// \returns True if an error occurred, false otherwise.
4552 bool CheckTemplateArgumentList(TemplateDecl *Template,
4553 SourceLocation TemplateLoc,
4554 TemplateArgumentListInfo &TemplateArgs,
4555 bool PartialTemplateArgs,
4556 SmallVectorImpl<TemplateArgument> &Converted,
4557 bool *ExpansionIntoFixedList = 0);
4559 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param,
4560 const TemplateArgumentLoc &Arg,
4561 SmallVectorImpl<TemplateArgument> &Converted);
4563 bool CheckTemplateArgument(TemplateTypeParmDecl *Param,
4564 TypeSourceInfo *Arg);
4565 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
4566 QualType InstantiatedParamType, Expr *Arg,
4567 TemplateArgument &Converted,
4568 CheckTemplateArgumentKind CTAK = CTAK_Specified);
4569 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param,
4570 const TemplateArgumentLoc &Arg);
4573 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
4575 SourceLocation Loc);
4577 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
4578 SourceLocation Loc);
4580 /// \brief Enumeration describing how template parameter lists are compared
4582 enum TemplateParameterListEqualKind {
4583 /// \brief We are matching the template parameter lists of two templates
4584 /// that might be redeclarations.
4587 /// template<typename T> struct X;
4588 /// template<typename T> struct X;
4592 /// \brief We are matching the template parameter lists of two template
4593 /// template parameters as part of matching the template parameter lists
4594 /// of two templates that might be redeclarations.
4597 /// template<template<int I> class TT> struct X;
4598 /// template<template<int Value> class Other> struct X;
4600 TPL_TemplateTemplateParmMatch,
4602 /// \brief We are matching the template parameter lists of a template
4603 /// template argument against the template parameter lists of a template
4604 /// template parameter.
4607 /// template<template<int Value> class Metafun> struct X;
4608 /// template<int Value> struct integer_c;
4609 /// X<integer_c> xic;
4611 TPL_TemplateTemplateArgumentMatch
4614 bool TemplateParameterListsAreEqual(TemplateParameterList *New,
4615 TemplateParameterList *Old,
4617 TemplateParameterListEqualKind Kind,
4618 SourceLocation TemplateArgLoc
4619 = SourceLocation());
4621 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams);
4623 /// \brief Called when the parser has parsed a C++ typename
4624 /// specifier, e.g., "typename T::type".
4626 /// \param S The scope in which this typename type occurs.
4627 /// \param TypenameLoc the location of the 'typename' keyword
4628 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4629 /// \param II the identifier we're retrieving (e.g., 'type' in the example).
4630 /// \param IdLoc the location of the identifier.
4632 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4633 const CXXScopeSpec &SS, const IdentifierInfo &II,
4634 SourceLocation IdLoc);
4636 /// \brief Called when the parser has parsed a C++ typename
4637 /// specifier that ends in a template-id, e.g.,
4638 /// "typename MetaFun::template apply<T1, T2>".
4640 /// \param S The scope in which this typename type occurs.
4641 /// \param TypenameLoc the location of the 'typename' keyword
4642 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
4643 /// \param TemplateLoc the location of the 'template' keyword, if any.
4644 /// \param TemplateName The template name.
4645 /// \param TemplateNameLoc The location of the template name.
4646 /// \param LAngleLoc The location of the opening angle bracket ('<').
4647 /// \param TemplateArgs The template arguments.
4648 /// \param RAngleLoc The location of the closing angle bracket ('>').
4650 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
4651 const CXXScopeSpec &SS,
4652 SourceLocation TemplateLoc,
4653 TemplateTy Template,
4654 SourceLocation TemplateNameLoc,
4655 SourceLocation LAngleLoc,
4656 ASTTemplateArgsPtr TemplateArgs,
4657 SourceLocation RAngleLoc);
4659 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword,
4660 SourceLocation KeywordLoc,
4661 NestedNameSpecifierLoc QualifierLoc,
4662 const IdentifierInfo &II,
4663 SourceLocation IILoc);
4665 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T,
4667 DeclarationName Name);
4668 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS);
4670 ExprResult RebuildExprInCurrentInstantiation(Expr *E);
4671 bool RebuildTemplateParamsInCurrentInstantiation(
4672 TemplateParameterList *Params);
4675 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
4676 const TemplateArgumentList &Args);
4679 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
4680 const TemplateArgument *Args,
4683 //===--------------------------------------------------------------------===//
4684 // C++ Variadic Templates (C++0x [temp.variadic])
4685 //===--------------------------------------------------------------------===//
4687 /// \brief The context in which an unexpanded parameter pack is
4688 /// being diagnosed.
4690 /// Note that the values of this enumeration line up with the first
4691 /// argument to the \c err_unexpanded_parameter_pack diagnostic.
4692 enum UnexpandedParameterPackContext {
4693 /// \brief An arbitrary expression.
4694 UPPC_Expression = 0,
4696 /// \brief The base type of a class type.
4699 /// \brief The type of an arbitrary declaration.
4700 UPPC_DeclarationType,
4702 /// \brief The type of a data member.
4703 UPPC_DataMemberType,
4705 /// \brief The size of a bit-field.
4708 /// \brief The expression in a static assertion.
4709 UPPC_StaticAssertExpression,
4711 /// \brief The fixed underlying type of an enumeration.
4712 UPPC_FixedUnderlyingType,
4714 /// \brief The enumerator value.
4715 UPPC_EnumeratorValue,
4717 /// \brief A using declaration.
4718 UPPC_UsingDeclaration,
4720 /// \brief A friend declaration.
4721 UPPC_FriendDeclaration,
4723 /// \brief A declaration qualifier.
4724 UPPC_DeclarationQualifier,
4726 /// \brief An initializer.
4729 /// \brief A default argument.
4730 UPPC_DefaultArgument,
4732 /// \brief The type of a non-type template parameter.
4733 UPPC_NonTypeTemplateParameterType,
4735 /// \brief The type of an exception.
4738 /// \brief Partial specialization.
4739 UPPC_PartialSpecialization,
4741 /// \brief Microsoft __if_exists.
4744 /// \brief Microsoft __if_not_exists.
4748 /// \brief Diagnose unexpanded parameter packs.
4750 /// \param Loc The location at which we should emit the diagnostic.
4752 /// \param UPPC The context in which we are diagnosing unexpanded
4753 /// parameter packs.
4755 /// \param Unexpanded the set of unexpanded parameter packs.
4756 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc,
4757 UnexpandedParameterPackContext UPPC,
4758 ArrayRef<UnexpandedParameterPack> Unexpanded);
4760 /// \brief If the given type contains an unexpanded parameter pack,
4761 /// diagnose the error.
4763 /// \param Loc The source location where a diagnostc should be emitted.
4765 /// \param T The type that is being checked for unexpanded parameter
4768 /// \returns true if an error occurred, false otherwise.
4769 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T,
4770 UnexpandedParameterPackContext UPPC);
4772 /// \brief If the given expression contains an unexpanded parameter
4773 /// pack, diagnose the error.
4775 /// \param E The expression that is being checked for unexpanded
4776 /// parameter packs.
4778 /// \returns true if an error occurred, false otherwise.
4779 bool DiagnoseUnexpandedParameterPack(Expr *E,
4780 UnexpandedParameterPackContext UPPC = UPPC_Expression);
4782 /// \brief If the given nested-name-specifier contains an unexpanded
4783 /// parameter pack, diagnose the error.
4785 /// \param SS The nested-name-specifier that is being checked for
4786 /// unexpanded parameter packs.
4788 /// \returns true if an error occurred, false otherwise.
4789 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS,
4790 UnexpandedParameterPackContext UPPC);
4792 /// \brief If the given name contains an unexpanded parameter pack,
4793 /// diagnose the error.
4795 /// \param NameInfo The name (with source location information) that
4796 /// is being checked for unexpanded parameter packs.
4798 /// \returns true if an error occurred, false otherwise.
4799 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo,
4800 UnexpandedParameterPackContext UPPC);
4802 /// \brief If the given template name contains an unexpanded parameter pack,
4803 /// diagnose the error.
4805 /// \param Loc The location of the template name.
4807 /// \param Template The template name that is being checked for unexpanded
4808 /// parameter packs.
4810 /// \returns true if an error occurred, false otherwise.
4811 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc,
4812 TemplateName Template,
4813 UnexpandedParameterPackContext UPPC);
4815 /// \brief If the given template argument contains an unexpanded parameter
4816 /// pack, diagnose the error.
4818 /// \param Arg The template argument that is being checked for unexpanded
4819 /// parameter packs.
4821 /// \returns true if an error occurred, false otherwise.
4822 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg,
4823 UnexpandedParameterPackContext UPPC);
4825 /// \brief Collect the set of unexpanded parameter packs within the given
4826 /// template argument.
4828 /// \param Arg The template argument that will be traversed to find
4829 /// unexpanded parameter packs.
4830 void collectUnexpandedParameterPacks(TemplateArgument Arg,
4831 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4833 /// \brief Collect the set of unexpanded parameter packs within the given
4834 /// template argument.
4836 /// \param Arg The template argument that will be traversed to find
4837 /// unexpanded parameter packs.
4838 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg,
4839 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4841 /// \brief Collect the set of unexpanded parameter packs within the given
4844 /// \param T The type that will be traversed to find
4845 /// unexpanded parameter packs.
4846 void collectUnexpandedParameterPacks(QualType T,
4847 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4849 /// \brief Collect the set of unexpanded parameter packs within the given
4852 /// \param TL The type that will be traversed to find
4853 /// unexpanded parameter packs.
4854 void collectUnexpandedParameterPacks(TypeLoc TL,
4855 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4857 /// \brief Collect the set of unexpanded parameter packs within the given
4858 /// nested-name-specifier.
4860 /// \param SS The nested-name-specifier that will be traversed to find
4861 /// unexpanded parameter packs.
4862 void collectUnexpandedParameterPacks(CXXScopeSpec &SS,
4863 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4865 /// \brief Collect the set of unexpanded parameter packs within the given
4868 /// \param NameInfo The name that will be traversed to find
4869 /// unexpanded parameter packs.
4870 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo,
4871 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
4873 /// \brief Invoked when parsing a template argument followed by an
4874 /// ellipsis, which creates a pack expansion.
4876 /// \param Arg The template argument preceding the ellipsis, which
4877 /// may already be invalid.
4879 /// \param EllipsisLoc The location of the ellipsis.
4880 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg,
4881 SourceLocation EllipsisLoc);
4883 /// \brief Invoked when parsing a type followed by an ellipsis, which
4884 /// creates a pack expansion.
4886 /// \param Type The type preceding the ellipsis, which will become
4887 /// the pattern of the pack expansion.
4889 /// \param EllipsisLoc The location of the ellipsis.
4890 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc);
4892 /// \brief Construct a pack expansion type from the pattern of the pack
4894 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern,
4895 SourceLocation EllipsisLoc,
4896 llvm::Optional<unsigned> NumExpansions);
4898 /// \brief Construct a pack expansion type from the pattern of the pack
4900 QualType CheckPackExpansion(QualType Pattern,
4901 SourceRange PatternRange,
4902 SourceLocation EllipsisLoc,
4903 llvm::Optional<unsigned> NumExpansions);
4905 /// \brief Invoked when parsing an expression followed by an ellipsis, which
4906 /// creates a pack expansion.
4908 /// \param Pattern The expression preceding the ellipsis, which will become
4909 /// the pattern of the pack expansion.
4911 /// \param EllipsisLoc The location of the ellipsis.
4912 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc);
4914 /// \brief Invoked when parsing an expression followed by an ellipsis, which
4915 /// creates a pack expansion.
4917 /// \param Pattern The expression preceding the ellipsis, which will become
4918 /// the pattern of the pack expansion.
4920 /// \param EllipsisLoc The location of the ellipsis.
4921 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc,
4922 llvm::Optional<unsigned> NumExpansions);
4924 /// \brief Determine whether we could expand a pack expansion with the
4925 /// given set of parameter packs into separate arguments by repeatedly
4926 /// transforming the pattern.
4928 /// \param EllipsisLoc The location of the ellipsis that identifies the
4931 /// \param PatternRange The source range that covers the entire pattern of
4932 /// the pack expansion.
4934 /// \param Unexpanded The set of unexpanded parameter packs within the
4937 /// \param NumUnexpanded The number of unexpanded parameter packs in
4940 /// \param ShouldExpand Will be set to \c true if the transformer should
4941 /// expand the corresponding pack expansions into separate arguments. When
4942 /// set, \c NumExpansions must also be set.
4944 /// \param RetainExpansion Whether the caller should add an unexpanded
4945 /// pack expansion after all of the expanded arguments. This is used
4946 /// when extending explicitly-specified template argument packs per
4947 /// C++0x [temp.arg.explicit]p9.
4949 /// \param NumExpansions The number of separate arguments that will be in
4950 /// the expanded form of the corresponding pack expansion. This is both an
4951 /// input and an output parameter, which can be set by the caller if the
4952 /// number of expansions is known a priori (e.g., due to a prior substitution)
4953 /// and will be set by the callee when the number of expansions is known.
4954 /// The callee must set this value when \c ShouldExpand is \c true; it may
4955 /// set this value in other cases.
4957 /// \returns true if an error occurred (e.g., because the parameter packs
4958 /// are to be instantiated with arguments of different lengths), false
4959 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
4961 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc,
4962 SourceRange PatternRange,
4963 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded,
4964 const MultiLevelTemplateArgumentList &TemplateArgs,
4966 bool &RetainExpansion,
4967 llvm::Optional<unsigned> &NumExpansions);
4969 /// \brief Determine the number of arguments in the given pack expansion
4972 /// This routine already assumes that the pack expansion type can be
4973 /// expanded and that the number of arguments in the expansion is
4974 /// consistent across all of the unexpanded parameter packs in its pattern.
4975 unsigned getNumArgumentsInExpansion(QualType T,
4976 const MultiLevelTemplateArgumentList &TemplateArgs);
4978 /// \brief Determine whether the given declarator contains any unexpanded
4979 /// parameter packs.
4981 /// This routine is used by the parser to disambiguate function declarators
4982 /// with an ellipsis prior to the ')', e.g.,
4988 /// To determine whether we have an (unnamed) function parameter pack or
4989 /// a variadic function.
4991 /// \returns true if the declarator contains any unexpanded parameter packs,
4992 /// false otherwise.
4993 bool containsUnexpandedParameterPacks(Declarator &D);
4995 //===--------------------------------------------------------------------===//
4996 // C++ Template Argument Deduction (C++ [temp.deduct])
4997 //===--------------------------------------------------------------------===//
4999 /// \brief Describes the result of template argument deduction.
5001 /// The TemplateDeductionResult enumeration describes the result of
5002 /// template argument deduction, as returned from
5003 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo
5004 /// structure provides additional information about the results of
5005 /// template argument deduction, e.g., the deduced template argument
5006 /// list (if successful) or the specific template parameters or
5007 /// deduced arguments that were involved in the failure.
5008 enum TemplateDeductionResult {
5009 /// \brief Template argument deduction was successful.
5011 /// \brief Template argument deduction exceeded the maximum template
5012 /// instantiation depth (which has already been diagnosed).
5013 TDK_InstantiationDepth,
5014 /// \brief Template argument deduction did not deduce a value
5015 /// for every template parameter.
5017 /// \brief Template argument deduction produced inconsistent
5018 /// deduced values for the given template parameter.
5020 /// \brief Template argument deduction failed due to inconsistent
5021 /// cv-qualifiers on a template parameter type that would
5022 /// otherwise be deduced, e.g., we tried to deduce T in "const T"
5023 /// but were given a non-const "X".
5025 /// \brief Substitution of the deduced template argument values
5026 /// resulted in an error.
5027 TDK_SubstitutionFailure,
5028 /// \brief Substitution of the deduced template argument values
5029 /// into a non-deduced context produced a type or value that
5030 /// produces a type that does not match the original template
5031 /// arguments provided.
5032 TDK_NonDeducedMismatch,
5033 /// \brief When performing template argument deduction for a function
5034 /// template, there were too many call arguments.
5035 TDK_TooManyArguments,
5036 /// \brief When performing template argument deduction for a function
5037 /// template, there were too few call arguments.
5038 TDK_TooFewArguments,
5039 /// \brief The explicitly-specified template arguments were not valid
5040 /// template arguments for the given template.
5041 TDK_InvalidExplicitArguments,
5042 /// \brief The arguments included an overloaded function name that could
5043 /// not be resolved to a suitable function.
5044 TDK_FailedOverloadResolution
5047 TemplateDeductionResult
5048 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial,
5049 const TemplateArgumentList &TemplateArgs,
5050 sema::TemplateDeductionInfo &Info);
5052 TemplateDeductionResult
5053 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5054 TemplateArgumentListInfo &ExplicitTemplateArgs,
5055 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5056 SmallVectorImpl<QualType> &ParamTypes,
5057 QualType *FunctionType,
5058 sema::TemplateDeductionInfo &Info);
5060 /// brief A function argument from which we performed template argument
5061 // deduction for a call.
5062 struct OriginalCallArg {
5063 OriginalCallArg(QualType OriginalParamType,
5065 QualType OriginalArgType)
5066 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx),
5067 OriginalArgType(OriginalArgType) { }
5069 QualType OriginalParamType;
5071 QualType OriginalArgType;
5074 TemplateDeductionResult
5075 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate,
5076 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
5077 unsigned NumExplicitlySpecified,
5078 FunctionDecl *&Specialization,
5079 sema::TemplateDeductionInfo &Info,
5080 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0);
5082 TemplateDeductionResult
5083 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5084 TemplateArgumentListInfo *ExplicitTemplateArgs,
5085 llvm::ArrayRef<Expr *> Args,
5086 FunctionDecl *&Specialization,
5087 sema::TemplateDeductionInfo &Info);
5089 TemplateDeductionResult
5090 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5091 TemplateArgumentListInfo *ExplicitTemplateArgs,
5092 QualType ArgFunctionType,
5093 FunctionDecl *&Specialization,
5094 sema::TemplateDeductionInfo &Info);
5096 TemplateDeductionResult
5097 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5099 CXXConversionDecl *&Specialization,
5100 sema::TemplateDeductionInfo &Info);
5102 TemplateDeductionResult
5103 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
5104 TemplateArgumentListInfo *ExplicitTemplateArgs,
5105 FunctionDecl *&Specialization,
5106 sema::TemplateDeductionInfo &Info);
5108 /// \brief Result type of DeduceAutoType.
5109 enum DeduceAutoResult {
5112 DAR_FailedAlreadyDiagnosed
5115 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer,
5116 TypeSourceInfo *&Result);
5117 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init);
5119 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1,
5120 FunctionTemplateDecl *FT2,
5122 TemplatePartialOrderingContext TPOC,
5123 unsigned NumCallArguments);
5124 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin,
5125 UnresolvedSetIterator SEnd,
5126 TemplatePartialOrderingContext TPOC,
5127 unsigned NumCallArguments,
5129 const PartialDiagnostic &NoneDiag,
5130 const PartialDiagnostic &AmbigDiag,
5131 const PartialDiagnostic &CandidateDiag,
5132 bool Complain = true,
5133 QualType TargetType = QualType());
5135 ClassTemplatePartialSpecializationDecl *
5136 getMoreSpecializedPartialSpecialization(
5137 ClassTemplatePartialSpecializationDecl *PS1,
5138 ClassTemplatePartialSpecializationDecl *PS2,
5139 SourceLocation Loc);
5141 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs,
5144 llvm::SmallBitVector &Used);
5145 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate,
5146 llvm::SmallBitVector &Deduced) {
5147 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced);
5149 static void MarkDeducedTemplateParameters(ASTContext &Ctx,
5150 FunctionTemplateDecl *FunctionTemplate,
5151 llvm::SmallBitVector &Deduced);
5153 //===--------------------------------------------------------------------===//
5154 // C++ Template Instantiation
5157 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D,
5158 const TemplateArgumentList *Innermost = 0,
5159 bool RelativeToPrimary = false,
5160 const FunctionDecl *Pattern = 0);
5162 /// \brief A template instantiation that is currently in progress.
5163 struct ActiveTemplateInstantiation {
5164 /// \brief The kind of template instantiation we are performing
5165 enum InstantiationKind {
5166 /// We are instantiating a template declaration. The entity is
5167 /// the declaration we're instantiating (e.g., a CXXRecordDecl).
5168 TemplateInstantiation,
5170 /// We are instantiating a default argument for a template
5171 /// parameter. The Entity is the template, and
5172 /// TemplateArgs/NumTemplateArguments provides the template
5173 /// arguments as specified.
5174 /// FIXME: Use a TemplateArgumentList
5175 DefaultTemplateArgumentInstantiation,
5177 /// We are instantiating a default argument for a function.
5178 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs
5179 /// provides the template arguments as specified.
5180 DefaultFunctionArgumentInstantiation,
5182 /// We are substituting explicit template arguments provided for
5183 /// a function template. The entity is a FunctionTemplateDecl.
5184 ExplicitTemplateArgumentSubstitution,
5186 /// We are substituting template argument determined as part of
5187 /// template argument deduction for either a class template
5188 /// partial specialization or a function template. The
5189 /// Entity is either a ClassTemplatePartialSpecializationDecl or
5190 /// a FunctionTemplateDecl.
5191 DeducedTemplateArgumentSubstitution,
5193 /// We are substituting prior template arguments into a new
5194 /// template parameter. The template parameter itself is either a
5195 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl.
5196 PriorTemplateArgumentSubstitution,
5198 /// We are checking the validity of a default template argument that
5199 /// has been used when naming a template-id.
5200 DefaultTemplateArgumentChecking,
5202 /// We are instantiating the exception specification for a function
5203 /// template which was deferred until it was needed.
5204 ExceptionSpecInstantiation
5207 /// \brief The point of instantiation within the source code.
5208 SourceLocation PointOfInstantiation;
5210 /// \brief The template (or partial specialization) in which we are
5211 /// performing the instantiation, for substitutions of prior template
5213 NamedDecl *Template;
5215 /// \brief The entity that is being instantiated.
5218 /// \brief The list of template arguments we are substituting, if they
5219 /// are not part of the entity.
5220 const TemplateArgument *TemplateArgs;
5222 /// \brief The number of template arguments in TemplateArgs.
5223 unsigned NumTemplateArgs;
5225 /// \brief The template deduction info object associated with the
5226 /// substitution or checking of explicit or deduced template arguments.
5227 sema::TemplateDeductionInfo *DeductionInfo;
5229 /// \brief The source range that covers the construct that cause
5230 /// the instantiation, e.g., the template-id that causes a class
5231 /// template instantiation.
5232 SourceRange InstantiationRange;
5234 ActiveTemplateInstantiation()
5235 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0),
5236 NumTemplateArgs(0), DeductionInfo(0) {}
5238 /// \brief Determines whether this template is an actual instantiation
5239 /// that should be counted toward the maximum instantiation depth.
5240 bool isInstantiationRecord() const;
5242 friend bool operator==(const ActiveTemplateInstantiation &X,
5243 const ActiveTemplateInstantiation &Y) {
5244 if (X.Kind != Y.Kind)
5247 if (X.Entity != Y.Entity)
5251 case TemplateInstantiation:
5252 case ExceptionSpecInstantiation:
5255 case PriorTemplateArgumentSubstitution:
5256 case DefaultTemplateArgumentChecking:
5257 if (X.Template != Y.Template)
5262 case DefaultTemplateArgumentInstantiation:
5263 case ExplicitTemplateArgumentSubstitution:
5264 case DeducedTemplateArgumentSubstitution:
5265 case DefaultFunctionArgumentInstantiation:
5266 return X.TemplateArgs == Y.TemplateArgs;
5270 llvm_unreachable("Invalid InstantiationKind!");
5273 friend bool operator!=(const ActiveTemplateInstantiation &X,
5274 const ActiveTemplateInstantiation &Y) {
5279 /// \brief List of active template instantiations.
5281 /// This vector is treated as a stack. As one template instantiation
5282 /// requires another template instantiation, additional
5283 /// instantiations are pushed onto the stack up to a
5284 /// user-configurable limit LangOptions::InstantiationDepth.
5285 SmallVector<ActiveTemplateInstantiation, 16>
5286 ActiveTemplateInstantiations;
5288 /// \brief Whether we are in a SFINAE context that is not associated with
5289 /// template instantiation.
5291 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside
5292 /// of a template instantiation or template argument deduction.
5293 bool InNonInstantiationSFINAEContext;
5295 /// \brief The number of ActiveTemplateInstantiation entries in
5296 /// \c ActiveTemplateInstantiations that are not actual instantiations and,
5297 /// therefore, should not be counted as part of the instantiation depth.
5298 unsigned NonInstantiationEntries;
5300 /// \brief The last template from which a template instantiation
5301 /// error or warning was produced.
5303 /// This value is used to suppress printing of redundant template
5304 /// instantiation backtraces when there are multiple errors in the
5305 /// same instantiation. FIXME: Does this belong in Sema? It's tough
5306 /// to implement it anywhere else.
5307 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext;
5309 /// \brief The current index into pack expansion arguments that will be
5310 /// used for substitution of parameter packs.
5312 /// The pack expansion index will be -1 to indicate that parameter packs
5313 /// should be instantiated as themselves. Otherwise, the index specifies
5314 /// which argument within the parameter pack will be used for substitution.
5315 int ArgumentPackSubstitutionIndex;
5317 /// \brief RAII object used to change the argument pack substitution index
5318 /// within a \c Sema object.
5320 /// See \c ArgumentPackSubstitutionIndex for more information.
5321 class ArgumentPackSubstitutionIndexRAII {
5323 int OldSubstitutionIndex;
5326 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex)
5327 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) {
5328 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex;
5331 ~ArgumentPackSubstitutionIndexRAII() {
5332 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex;
5336 friend class ArgumentPackSubstitutionRAII;
5338 /// \brief The stack of calls expression undergoing template instantiation.
5340 /// The top of this stack is used by a fixit instantiating unresolved
5341 /// function calls to fix the AST to match the textual change it prints.
5342 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation;
5344 /// \brief For each declaration that involved template argument deduction, the
5345 /// set of diagnostics that were suppressed during that template argument
5348 /// FIXME: Serialize this structure to the AST file.
5349 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >
5350 SuppressedDiagnostics;
5352 /// \brief A stack object to be created when performing template
5355 /// Construction of an object of type \c InstantiatingTemplate
5356 /// pushes the current instantiation onto the stack of active
5357 /// instantiations. If the size of this stack exceeds the maximum
5358 /// number of recursive template instantiations, construction
5359 /// produces an error and evaluates true.
5361 /// Destruction of this object will pop the named instantiation off
5363 struct InstantiatingTemplate {
5364 /// \brief Note that we are instantiating a class template,
5365 /// function template, or a member thereof.
5366 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5368 SourceRange InstantiationRange = SourceRange());
5370 struct ExceptionSpecification {};
5371 /// \brief Note that we are instantiating an exception specification
5372 /// of a function template.
5373 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5374 FunctionDecl *Entity, ExceptionSpecification,
5375 SourceRange InstantiationRange = SourceRange());
5377 /// \brief Note that we are instantiating a default argument in a
5379 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5380 TemplateDecl *Template,
5381 const TemplateArgument *TemplateArgs,
5382 unsigned NumTemplateArgs,
5383 SourceRange InstantiationRange = SourceRange());
5385 /// \brief Note that we are instantiating a default argument in a
5387 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5388 FunctionTemplateDecl *FunctionTemplate,
5389 const TemplateArgument *TemplateArgs,
5390 unsigned NumTemplateArgs,
5391 ActiveTemplateInstantiation::InstantiationKind Kind,
5392 sema::TemplateDeductionInfo &DeductionInfo,
5393 SourceRange InstantiationRange = SourceRange());
5395 /// \brief Note that we are instantiating as part of template
5396 /// argument deduction for a class template partial
5398 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5399 ClassTemplatePartialSpecializationDecl *PartialSpec,
5400 const TemplateArgument *TemplateArgs,
5401 unsigned NumTemplateArgs,
5402 sema::TemplateDeductionInfo &DeductionInfo,
5403 SourceRange InstantiationRange = SourceRange());
5405 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5407 const TemplateArgument *TemplateArgs,
5408 unsigned NumTemplateArgs,
5409 SourceRange InstantiationRange = SourceRange());
5411 /// \brief Note that we are substituting prior template arguments into a
5412 /// non-type or template template parameter.
5413 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5414 NamedDecl *Template,
5415 NonTypeTemplateParmDecl *Param,
5416 const TemplateArgument *TemplateArgs,
5417 unsigned NumTemplateArgs,
5418 SourceRange InstantiationRange);
5420 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5421 NamedDecl *Template,
5422 TemplateTemplateParmDecl *Param,
5423 const TemplateArgument *TemplateArgs,
5424 unsigned NumTemplateArgs,
5425 SourceRange InstantiationRange);
5427 /// \brief Note that we are checking the default template argument
5428 /// against the template parameter for a given template-id.
5429 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
5430 TemplateDecl *Template,
5432 const TemplateArgument *TemplateArgs,
5433 unsigned NumTemplateArgs,
5434 SourceRange InstantiationRange);
5437 /// \brief Note that we have finished instantiating this template.
5440 ~InstantiatingTemplate() { Clear(); }
5442 /// \brief Determines whether we have exceeded the maximum
5443 /// recursive template instantiations.
5444 operator bool() const { return Invalid; }
5449 bool SavedInNonInstantiationSFINAEContext;
5450 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation,
5451 SourceRange InstantiationRange);
5453 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented
5455 InstantiatingTemplate&
5456 operator=(const InstantiatingTemplate&); // not implemented
5459 void PrintInstantiationStack();
5461 /// \brief Determines whether we are currently in a context where
5462 /// template argument substitution failures are not considered
5465 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context.
5466 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest
5467 /// template-deduction context object, which can be used to capture
5468 /// diagnostics that will be suppressed.
5469 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
5471 /// \brief RAII class used to determine whether SFINAE has
5472 /// trapped any errors that occur during template argument
5476 unsigned PrevSFINAEErrors;
5477 bool PrevInNonInstantiationSFINAEContext;
5478 bool PrevAccessCheckingSFINAE;
5481 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false)
5482 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors),
5483 PrevInNonInstantiationSFINAEContext(
5484 SemaRef.InNonInstantiationSFINAEContext),
5485 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE)
5487 if (!SemaRef.isSFINAEContext())
5488 SemaRef.InNonInstantiationSFINAEContext = true;
5489 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE;
5493 SemaRef.NumSFINAEErrors = PrevSFINAEErrors;
5494 SemaRef.InNonInstantiationSFINAEContext
5495 = PrevInNonInstantiationSFINAEContext;
5496 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE;
5499 /// \brief Determine whether any SFINAE errors have been trapped.
5500 bool hasErrorOccurred() const {
5501 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors;
5505 /// \brief The current instantiation scope used to store local
5507 LocalInstantiationScope *CurrentInstantiationScope;
5509 /// \brief The number of typos corrected by CorrectTypo.
5510 unsigned TyposCorrected;
5512 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection>
5513 UnqualifiedTyposCorrectedMap;
5515 /// \brief A cache containing the results of typo correction for unqualified
5518 /// The string is the string that we corrected to (which may be empty, if
5519 /// there was no correction), while the boolean will be true when the
5520 /// string represents a keyword.
5521 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected;
5523 /// \brief Worker object for performing CFG-based warnings.
5524 sema::AnalysisBasedWarnings AnalysisWarnings;
5526 /// \brief An entity for which implicit template instantiation is required.
5528 /// The source location associated with the declaration is the first place in
5529 /// the source code where the declaration was "used". It is not necessarily
5530 /// the point of instantiation (which will be either before or after the
5531 /// namespace-scope declaration that triggered this implicit instantiation),
5532 /// However, it is the location that diagnostics should generally refer to,
5533 /// because users will need to know what code triggered the instantiation.
5534 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation;
5536 /// \brief The queue of implicit template instantiations that are required
5537 /// but have not yet been performed.
5538 std::deque<PendingImplicitInstantiation> PendingInstantiations;
5540 /// \brief The queue of implicit template instantiations that are required
5541 /// and must be performed within the current local scope.
5543 /// This queue is only used for member functions of local classes in
5544 /// templates, which must be instantiated in the same scope as their
5545 /// enclosing function, so that they can reference function-local
5546 /// types, static variables, enumerators, etc.
5547 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations;
5549 void PerformPendingInstantiations(bool LocalOnly = false);
5551 TypeSourceInfo *SubstType(TypeSourceInfo *T,
5552 const MultiLevelTemplateArgumentList &TemplateArgs,
5553 SourceLocation Loc, DeclarationName Entity);
5555 QualType SubstType(QualType T,
5556 const MultiLevelTemplateArgumentList &TemplateArgs,
5557 SourceLocation Loc, DeclarationName Entity);
5559 TypeSourceInfo *SubstType(TypeLoc TL,
5560 const MultiLevelTemplateArgumentList &TemplateArgs,
5561 SourceLocation Loc, DeclarationName Entity);
5563 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T,
5564 const MultiLevelTemplateArgumentList &TemplateArgs,
5566 DeclarationName Entity,
5567 CXXRecordDecl *ThisContext,
5568 unsigned ThisTypeQuals);
5569 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D,
5570 const MultiLevelTemplateArgumentList &TemplateArgs,
5571 int indexAdjustment,
5572 llvm::Optional<unsigned> NumExpansions,
5573 bool ExpectParameterPack);
5574 bool SubstParmTypes(SourceLocation Loc,
5575 ParmVarDecl **Params, unsigned NumParams,
5576 const MultiLevelTemplateArgumentList &TemplateArgs,
5577 SmallVectorImpl<QualType> &ParamTypes,
5578 SmallVectorImpl<ParmVarDecl *> *OutParams = 0);
5579 ExprResult SubstExpr(Expr *E,
5580 const MultiLevelTemplateArgumentList &TemplateArgs);
5582 /// \brief Substitute the given template arguments into a list of
5583 /// expressions, expanding pack expansions if required.
5585 /// \param Exprs The list of expressions to substitute into.
5587 /// \param NumExprs The number of expressions in \p Exprs.
5589 /// \param IsCall Whether this is some form of call, in which case
5590 /// default arguments will be dropped.
5592 /// \param TemplateArgs The set of template arguments to substitute.
5594 /// \param Outputs Will receive all of the substituted arguments.
5596 /// \returns true if an error occurred, false otherwise.
5597 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall,
5598 const MultiLevelTemplateArgumentList &TemplateArgs,
5599 SmallVectorImpl<Expr *> &Outputs);
5601 StmtResult SubstStmt(Stmt *S,
5602 const MultiLevelTemplateArgumentList &TemplateArgs);
5604 Decl *SubstDecl(Decl *D, DeclContext *Owner,
5605 const MultiLevelTemplateArgumentList &TemplateArgs);
5607 ExprResult SubstInitializer(Expr *E,
5608 const MultiLevelTemplateArgumentList &TemplateArgs,
5609 bool CXXDirectInit);
5612 SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
5613 CXXRecordDecl *Pattern,
5614 const MultiLevelTemplateArgumentList &TemplateArgs);
5617 InstantiateClass(SourceLocation PointOfInstantiation,
5618 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
5619 const MultiLevelTemplateArgumentList &TemplateArgs,
5620 TemplateSpecializationKind TSK,
5621 bool Complain = true);
5623 bool InstantiateEnum(SourceLocation PointOfInstantiation,
5624 EnumDecl *Instantiation, EnumDecl *Pattern,
5625 const MultiLevelTemplateArgumentList &TemplateArgs,
5626 TemplateSpecializationKind TSK);
5628 struct LateInstantiatedAttribute {
5629 const Attr *TmplAttr;
5630 LocalInstantiationScope *Scope;
5633 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S,
5635 : TmplAttr(A), Scope(S), NewDecl(D)
5638 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec;
5640 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
5641 const Decl *Pattern, Decl *Inst,
5642 LateInstantiatedAttrVec *LateAttrs = 0,
5643 LocalInstantiationScope *OuterMostScope = 0);
5646 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation,
5647 ClassTemplateSpecializationDecl *ClassTemplateSpec,
5648 TemplateSpecializationKind TSK,
5649 bool Complain = true);
5651 void InstantiateClassMembers(SourceLocation PointOfInstantiation,
5652 CXXRecordDecl *Instantiation,
5653 const MultiLevelTemplateArgumentList &TemplateArgs,
5654 TemplateSpecializationKind TSK);
5656 void InstantiateClassTemplateSpecializationMembers(
5657 SourceLocation PointOfInstantiation,
5658 ClassTemplateSpecializationDecl *ClassTemplateSpec,
5659 TemplateSpecializationKind TSK);
5661 NestedNameSpecifierLoc
5662 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
5663 const MultiLevelTemplateArgumentList &TemplateArgs);
5666 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
5667 const MultiLevelTemplateArgumentList &TemplateArgs);
5669 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name,
5671 const MultiLevelTemplateArgumentList &TemplateArgs);
5672 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
5673 TemplateArgumentListInfo &Result,
5674 const MultiLevelTemplateArgumentList &TemplateArgs);
5676 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
5677 FunctionDecl *Function);
5678 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
5679 FunctionDecl *Function,
5680 bool Recursive = false,
5681 bool DefinitionRequired = false);
5682 void InstantiateStaticDataMemberDefinition(
5683 SourceLocation PointOfInstantiation,
5685 bool Recursive = false,
5686 bool DefinitionRequired = false);
5688 void InstantiateMemInitializers(CXXConstructorDecl *New,
5689 const CXXConstructorDecl *Tmpl,
5690 const MultiLevelTemplateArgumentList &TemplateArgs);
5692 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
5693 const MultiLevelTemplateArgumentList &TemplateArgs);
5694 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC,
5695 const MultiLevelTemplateArgumentList &TemplateArgs);
5697 // Objective-C declarations.
5698 enum ObjCContainerKind {
5705 OCK_CategoryImplementation
5707 ObjCContainerKind getObjCContainerKind() const;
5709 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
5710 IdentifierInfo *ClassName,
5711 SourceLocation ClassLoc,
5712 IdentifierInfo *SuperName,
5713 SourceLocation SuperLoc,
5714 Decl * const *ProtoRefs,
5715 unsigned NumProtoRefs,
5716 const SourceLocation *ProtoLocs,
5717 SourceLocation EndProtoLoc,
5718 AttributeList *AttrList);
5720 Decl *ActOnCompatiblityAlias(
5721 SourceLocation AtCompatibilityAliasLoc,
5722 IdentifierInfo *AliasName, SourceLocation AliasLocation,
5723 IdentifierInfo *ClassName, SourceLocation ClassLocation);
5725 bool CheckForwardProtocolDeclarationForCircularDependency(
5726 IdentifierInfo *PName,
5727 SourceLocation &PLoc, SourceLocation PrevLoc,
5728 const ObjCList<ObjCProtocolDecl> &PList);
5730 Decl *ActOnStartProtocolInterface(
5731 SourceLocation AtProtoInterfaceLoc,
5732 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc,
5733 Decl * const *ProtoRefNames, unsigned NumProtoRefs,
5734 const SourceLocation *ProtoLocs,
5735 SourceLocation EndProtoLoc,
5736 AttributeList *AttrList);
5738 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
5739 IdentifierInfo *ClassName,
5740 SourceLocation ClassLoc,
5741 IdentifierInfo *CategoryName,
5742 SourceLocation CategoryLoc,
5743 Decl * const *ProtoRefs,
5744 unsigned NumProtoRefs,
5745 const SourceLocation *ProtoLocs,
5746 SourceLocation EndProtoLoc);
5748 Decl *ActOnStartClassImplementation(
5749 SourceLocation AtClassImplLoc,
5750 IdentifierInfo *ClassName, SourceLocation ClassLoc,
5751 IdentifierInfo *SuperClassname,
5752 SourceLocation SuperClassLoc);
5754 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc,
5755 IdentifierInfo *ClassName,
5756 SourceLocation ClassLoc,
5757 IdentifierInfo *CatName,
5758 SourceLocation CatLoc);
5760 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl,
5761 ArrayRef<Decl *> Decls);
5763 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc,
5764 IdentifierInfo **IdentList,
5765 SourceLocation *IdentLocs,
5768 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc,
5769 const IdentifierLocPair *IdentList,
5771 AttributeList *attrList);
5773 void FindProtocolDeclaration(bool WarnOnDeclarations,
5774 const IdentifierLocPair *ProtocolId,
5775 unsigned NumProtocols,
5776 SmallVectorImpl<Decl *> &Protocols);
5778 /// Ensure attributes are consistent with type.
5779 /// \param [in, out] Attributes The attributes to check; they will
5780 /// be modified to be consistent with \arg PropertyTy.
5781 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy,
5783 unsigned &Attributes);
5785 /// Process the specified property declaration and create decls for the
5786 /// setters and getters as needed.
5787 /// \param property The property declaration being processed
5788 /// \param DC The semantic container for the property
5789 /// \param redeclaredProperty Declaration for property if redeclared
5790 /// in class extension.
5791 /// \param lexicalDC Container for redeclaredProperty.
5792 void ProcessPropertyDecl(ObjCPropertyDecl *property,
5793 ObjCContainerDecl *DC,
5794 ObjCPropertyDecl *redeclaredProperty = 0,
5795 ObjCContainerDecl *lexicalDC = 0);
5797 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
5798 ObjCPropertyDecl *SuperProperty,
5799 const IdentifierInfo *Name);
5800 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl);
5802 void CompareMethodParamsInBaseAndSuper(Decl *IDecl,
5803 ObjCMethodDecl *MethodDecl,
5806 void CompareProperties(Decl *CDecl, Decl *MergeProtocols);
5808 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
5809 ObjCInterfaceDecl *ID);
5811 void MatchOneProtocolPropertiesInClass(Decl *CDecl,
5812 ObjCProtocolDecl *PDecl);
5814 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd,
5815 Decl **allMethods = 0, unsigned allNum = 0,
5816 Decl **allProperties = 0, unsigned pNum = 0,
5817 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0);
5819 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc,
5820 SourceLocation LParenLoc,
5821 FieldDeclarator &FD, ObjCDeclSpec &ODS,
5822 Selector GetterSel, Selector SetterSel,
5823 bool *OverridingProperty,
5824 tok::ObjCKeywordKind MethodImplKind,
5825 DeclContext *lexicalDC = 0);
5827 Decl *ActOnPropertyImplDecl(Scope *S,
5828 SourceLocation AtLoc,
5829 SourceLocation PropertyLoc,
5831 IdentifierInfo *PropertyId,
5832 IdentifierInfo *PropertyIvar,
5833 SourceLocation PropertyIvarLoc);
5835 enum ObjCSpecialMethodKind {
5841 OSMK_NonRetainingInit
5844 struct ObjCArgInfo {
5845 IdentifierInfo *Name;
5846 SourceLocation NameLoc;
5847 // The Type is null if no type was specified, and the DeclSpec is invalid
5850 ObjCDeclSpec DeclSpec;
5852 /// ArgAttrs - Attribute list for this argument.
5853 AttributeList *ArgAttrs;
5856 Decl *ActOnMethodDeclaration(
5858 SourceLocation BeginLoc, // location of the + or -.
5859 SourceLocation EndLoc, // location of the ; or {.
5860 tok::TokenKind MethodType,
5861 ObjCDeclSpec &ReturnQT, ParsedType ReturnType,
5862 ArrayRef<SourceLocation> SelectorLocs, Selector Sel,
5863 // optional arguments. The number of types/arguments is obtained
5864 // from the Sel.getNumArgs().
5865 ObjCArgInfo *ArgInfo,
5866 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args
5867 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind,
5868 bool isVariadic, bool MethodDefinition);
5870 // Helper method for ActOnClassMethod/ActOnInstanceMethod.
5871 // Will search "local" class/category implementations for a method decl.
5872 // Will also search in class's root looking for instance method.
5873 // Returns 0 if no method is found.
5874 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel,
5875 ObjCInterfaceDecl *CDecl);
5876 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel,
5877 ObjCInterfaceDecl *ClassDecl);
5878 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel,
5879 const ObjCObjectPointerType *OPT,
5881 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty,
5884 bool inferObjCARCLifetime(ValueDecl *decl);
5887 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT,
5889 SourceLocation OpLoc,
5890 DeclarationName MemberName,
5891 SourceLocation MemberLoc,
5892 SourceLocation SuperLoc, QualType SuperType,
5896 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName,
5897 IdentifierInfo &propertyName,
5898 SourceLocation receiverNameLoc,
5899 SourceLocation propertyNameLoc);
5901 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc);
5903 /// \brief Describes the kind of message expression indicated by a message
5904 /// send that starts with an identifier.
5905 enum ObjCMessageKind {
5906 /// \brief The message is sent to 'super'.
5908 /// \brief The message is an instance message.
5909 ObjCInstanceMessage,
5910 /// \brief The message is a class message, and the identifier is a type
5915 ObjCMessageKind getObjCMessageKind(Scope *S,
5916 IdentifierInfo *Name,
5917 SourceLocation NameLoc,
5919 bool HasTrailingDot,
5920 ParsedType &ReceiverType);
5922 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc,
5924 SourceLocation LBracLoc,
5925 ArrayRef<SourceLocation> SelectorLocs,
5926 SourceLocation RBracLoc,
5929 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
5930 QualType ReceiverType,
5931 SourceLocation SuperLoc,
5933 ObjCMethodDecl *Method,
5934 SourceLocation LBracLoc,
5935 ArrayRef<SourceLocation> SelectorLocs,
5936 SourceLocation RBracLoc,
5938 bool isImplicit = false);
5940 ExprResult BuildClassMessageImplicit(QualType ReceiverType,
5941 bool isSuperReceiver,
5944 ObjCMethodDecl *Method,
5947 ExprResult ActOnClassMessage(Scope *S,
5948 ParsedType Receiver,
5950 SourceLocation LBracLoc,
5951 ArrayRef<SourceLocation> SelectorLocs,
5952 SourceLocation RBracLoc,
5955 ExprResult BuildInstanceMessage(Expr *Receiver,
5956 QualType ReceiverType,
5957 SourceLocation SuperLoc,
5959 ObjCMethodDecl *Method,
5960 SourceLocation LBracLoc,
5961 ArrayRef<SourceLocation> SelectorLocs,
5962 SourceLocation RBracLoc,
5964 bool isImplicit = false);
5966 ExprResult BuildInstanceMessageImplicit(Expr *Receiver,
5967 QualType ReceiverType,
5970 ObjCMethodDecl *Method,
5973 ExprResult ActOnInstanceMessage(Scope *S,
5976 SourceLocation LBracLoc,
5977 ArrayRef<SourceLocation> SelectorLocs,
5978 SourceLocation RBracLoc,
5981 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc,
5982 ObjCBridgeCastKind Kind,
5983 SourceLocation BridgeKeywordLoc,
5984 TypeSourceInfo *TSInfo,
5987 ExprResult ActOnObjCBridgedCast(Scope *S,
5988 SourceLocation LParenLoc,
5989 ObjCBridgeCastKind Kind,
5990 SourceLocation BridgeKeywordLoc,
5992 SourceLocation RParenLoc,
5995 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
5997 /// \brief Check whether the given new method is a valid override of the
5998 /// given overridden method, and set any properties that should be inherited.
5999 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod,
6000 const ObjCMethodDecl *Overridden,
6001 bool IsImplementation);
6003 /// \brief Check whether the given method overrides any methods in its class,
6004 /// calling \c CheckObjCMethodOverride for each overridden method.
6005 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC);
6007 enum PragmaOptionsAlignKind {
6008 POAK_Native, // #pragma options align=native
6009 POAK_Natural, // #pragma options align=natural
6010 POAK_Packed, // #pragma options align=packed
6011 POAK_Power, // #pragma options align=power
6012 POAK_Mac68k, // #pragma options align=mac68k
6013 POAK_Reset // #pragma options align=reset
6016 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align.
6017 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
6018 SourceLocation PragmaLoc,
6019 SourceLocation KindLoc);
6021 enum PragmaPackKind {
6022 PPK_Default, // #pragma pack([n])
6023 PPK_Show, // #pragma pack(show), only supported by MSVC.
6024 PPK_Push, // #pragma pack(push, [identifier], [n])
6025 PPK_Pop // #pragma pack(pop, [identifier], [n])
6028 enum PragmaMSStructKind {
6029 PMSST_OFF, // #pragms ms_struct off
6030 PMSST_ON // #pragms ms_struct on
6033 /// ActOnPragmaPack - Called on well formed #pragma pack(...).
6034 void ActOnPragmaPack(PragmaPackKind Kind,
6035 IdentifierInfo *Name,
6037 SourceLocation PragmaLoc,
6038 SourceLocation LParenLoc,
6039 SourceLocation RParenLoc);
6041 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off].
6042 void ActOnPragmaMSStruct(PragmaMSStructKind Kind);
6044 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'.
6045 void ActOnPragmaUnused(const Token &Identifier,
6047 SourceLocation PragmaLoc);
6049 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... .
6050 void ActOnPragmaVisibility(const IdentifierInfo* VisType,
6051 SourceLocation PragmaLoc);
6053 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
6054 SourceLocation Loc);
6055 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W);
6057 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident.
6058 void ActOnPragmaWeakID(IdentifierInfo* WeakName,
6059 SourceLocation PragmaLoc,
6060 SourceLocation WeakNameLoc);
6062 /// ActOnPragmaRedefineExtname - Called on well formed
6063 /// #pragma redefine_extname oldname newname.
6064 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName,
6065 IdentifierInfo* AliasName,
6066 SourceLocation PragmaLoc,
6067 SourceLocation WeakNameLoc,
6068 SourceLocation AliasNameLoc);
6070 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident.
6071 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName,
6072 IdentifierInfo* AliasName,
6073 SourceLocation PragmaLoc,
6074 SourceLocation WeakNameLoc,
6075 SourceLocation AliasNameLoc);
6077 /// ActOnPragmaFPContract - Called on well formed
6078 /// #pragma {STDC,OPENCL} FP_CONTRACT
6079 void ActOnPragmaFPContract(tok::OnOffSwitch OOS);
6081 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to
6082 /// a the record decl, to handle '#pragma pack' and '#pragma options align'.
6083 void AddAlignmentAttributesForRecord(RecordDecl *RD);
6085 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record.
6086 void AddMsStructLayoutForRecord(RecordDecl *RD);
6088 /// FreePackedContext - Deallocate and null out PackContext.
6089 void FreePackedContext();
6091 /// PushNamespaceVisibilityAttr - Note that we've entered a
6092 /// namespace with a visibility attribute.
6093 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr,
6094 SourceLocation Loc);
6096 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used,
6097 /// add an appropriate visibility attribute.
6098 void AddPushedVisibilityAttribute(Decl *RD);
6100 /// PopPragmaVisibility - Pop the top element of the visibility stack; used
6101 /// for '#pragma GCC visibility' and visibility attributes on namespaces.
6102 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc);
6104 /// FreeVisContext - Deallocate and null out VisContext.
6105 void FreeVisContext();
6107 /// AddCFAuditedAttribute - Check whether we're currently within
6108 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding
6109 /// the appropriate attribute.
6110 void AddCFAuditedAttribute(Decl *D);
6112 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
6113 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E);
6114 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T);
6116 /// \brief The kind of conversion being performed.
6117 enum CheckedConversionKind {
6118 /// \brief An implicit conversion.
6119 CCK_ImplicitConversion,
6120 /// \brief A C-style cast.
6122 /// \brief A functional-style cast.
6124 /// \brief A cast other than a C-style cast.
6128 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
6129 /// cast. If there is already an implicit cast, merge into the existing one.
6130 /// If isLvalue, the result of the cast is an lvalue.
6131 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK,
6132 ExprValueKind VK = VK_RValue,
6133 const CXXCastPath *BasePath = 0,
6134 CheckedConversionKind CCK
6135 = CCK_ImplicitConversion);
6137 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
6138 /// to the conversion from scalar type ScalarTy to the Boolean type.
6139 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy);
6141 /// IgnoredValueConversions - Given that an expression's result is
6142 /// syntactically ignored, perform any conversions that are
6144 ExprResult IgnoredValueConversions(Expr *E);
6146 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
6147 // functions and arrays to their respective pointers (C99 6.3.2.1).
6148 ExprResult UsualUnaryConversions(Expr *E);
6150 // DefaultFunctionArrayConversion - converts functions and arrays
6151 // to their respective pointers (C99 6.3.2.1).
6152 ExprResult DefaultFunctionArrayConversion(Expr *E);
6154 // DefaultFunctionArrayLvalueConversion - converts functions and
6155 // arrays to their respective pointers and performs the
6156 // lvalue-to-rvalue conversion.
6157 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E);
6159 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on
6160 // the operand. This is DefaultFunctionArrayLvalueConversion,
6161 // except that it assumes the operand isn't of function or array
6163 ExprResult DefaultLvalueConversion(Expr *E);
6165 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that
6166 // do not have a prototype. Integer promotions are performed on each
6167 // argument, and arguments that have type float are promoted to double.
6168 ExprResult DefaultArgumentPromotion(Expr *E);
6170 // Used for emitting the right warning by DefaultVariadicArgumentPromotion
6171 enum VariadicCallType {
6175 VariadicConstructor,
6176 VariadicDoesNotApply
6179 /// GatherArgumentsForCall - Collector argument expressions for various
6180 /// form of call prototypes.
6181 bool GatherArgumentsForCall(SourceLocation CallLoc,
6182 FunctionDecl *FDecl,
6183 const FunctionProtoType *Proto,
6184 unsigned FirstProtoArg,
6185 Expr **Args, unsigned NumArgs,
6186 SmallVector<Expr *, 8> &AllArgs,
6187 VariadicCallType CallType = VariadicDoesNotApply,
6188 bool AllowExplicit = false);
6190 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
6191 // will warn if the resulting type is not a POD type.
6192 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
6193 FunctionDecl *FDecl);
6195 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's
6196 // operands and then handles various conversions that are common to binary
6197 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this
6198 // routine returns the first non-arithmetic type found. The client is
6199 // responsible for emitting appropriate error diagnostics.
6200 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS,
6201 bool IsCompAssign = false);
6203 /// AssignConvertType - All of the 'assignment' semantic checks return this
6204 /// enum to indicate whether the assignment was allowed. These checks are
6205 /// done for simple assignments, as well as initialization, return from
6206 /// function, argument passing, etc. The query is phrased in terms of a
6207 /// source and destination type.
6208 enum AssignConvertType {
6209 /// Compatible - the types are compatible according to the standard.
6212 /// PointerToInt - The assignment converts a pointer to an int, which we
6213 /// accept as an extension.
6216 /// IntToPointer - The assignment converts an int to a pointer, which we
6217 /// accept as an extension.
6220 /// FunctionVoidPointer - The assignment is between a function pointer and
6221 /// void*, which the standard doesn't allow, but we accept as an extension.
6222 FunctionVoidPointer,
6224 /// IncompatiblePointer - The assignment is between two pointers types that
6225 /// are not compatible, but we accept them as an extension.
6226 IncompatiblePointer,
6228 /// IncompatiblePointer - The assignment is between two pointers types which
6229 /// point to integers which have a different sign, but are otherwise
6230 /// identical. This is a subset of the above, but broken out because it's by
6231 /// far the most common case of incompatible pointers.
6232 IncompatiblePointerSign,
6234 /// CompatiblePointerDiscardsQualifiers - The assignment discards
6235 /// c/v/r qualifiers, which we accept as an extension.
6236 CompatiblePointerDiscardsQualifiers,
6238 /// IncompatiblePointerDiscardsQualifiers - The assignment
6239 /// discards qualifiers that we don't permit to be discarded,
6240 /// like address spaces.
6241 IncompatiblePointerDiscardsQualifiers,
6243 /// IncompatibleNestedPointerQualifiers - The assignment is between two
6244 /// nested pointer types, and the qualifiers other than the first two
6245 /// levels differ e.g. char ** -> const char **, but we accept them as an
6247 IncompatibleNestedPointerQualifiers,
6249 /// IncompatibleVectors - The assignment is between two vector types that
6250 /// have the same size, which we accept as an extension.
6251 IncompatibleVectors,
6253 /// IntToBlockPointer - The assignment converts an int to a block
6254 /// pointer. We disallow this.
6257 /// IncompatibleBlockPointer - The assignment is between two block
6258 /// pointers types that are not compatible.
6259 IncompatibleBlockPointer,
6261 /// IncompatibleObjCQualifiedId - The assignment is between a qualified
6262 /// id type and something else (that is incompatible with it). For example,
6263 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol.
6264 IncompatibleObjCQualifiedId,
6266 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an
6267 /// object with __weak qualifier.
6268 IncompatibleObjCWeakRef,
6270 /// Incompatible - We reject this conversion outright, it is invalid to
6271 /// represent it in the AST.
6275 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the
6276 /// assignment conversion type specified by ConvTy. This returns true if the
6277 /// conversion was invalid or false if the conversion was accepted.
6278 bool DiagnoseAssignmentResult(AssignConvertType ConvTy,
6280 QualType DstType, QualType SrcType,
6281 Expr *SrcExpr, AssignmentAction Action,
6282 bool *Complained = 0);
6284 /// CheckAssignmentConstraints - Perform type checking for assignment,
6285 /// argument passing, variable initialization, and function return values.
6287 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc,
6291 /// Check assignment constraints and prepare for a conversion of the
6292 /// RHS to the LHS type.
6293 AssignConvertType CheckAssignmentConstraints(QualType LHSType,
6297 // CheckSingleAssignmentConstraints - Currently used by
6298 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking,
6299 // this routine performs the default function/array converions.
6300 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType,
6302 bool Diagnose = true);
6304 // \brief If the lhs type is a transparent union, check whether we
6305 // can initialize the transparent union with the given expression.
6306 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType,
6309 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType);
6311 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType);
6313 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6314 AssignmentAction Action,
6315 bool AllowExplicit = false);
6316 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6317 AssignmentAction Action,
6319 ImplicitConversionSequence& ICS);
6320 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6321 const ImplicitConversionSequence& ICS,
6322 AssignmentAction Action,
6323 CheckedConversionKind CCK
6324 = CCK_ImplicitConversion);
6325 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
6326 const StandardConversionSequence& SCS,
6327 AssignmentAction Action,
6328 CheckedConversionKind CCK);
6330 /// the following "Check" methods will return a valid/converted QualType
6331 /// or a null QualType (indicating an error diagnostic was issued).
6333 /// type checking binary operators (subroutines of CreateBuiltinBinOp).
6334 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS,
6336 QualType CheckPointerToMemberOperands( // C++ 5.5
6337 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK,
6338 SourceLocation OpLoc, bool isIndirect);
6339 QualType CheckMultiplyDivideOperands( // C99 6.5.5
6340 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign,
6342 QualType CheckRemainderOperands( // C99 6.5.5
6343 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6344 bool IsCompAssign = false);
6345 QualType CheckAdditionOperands( // C99 6.5.6
6346 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6347 QualType* CompLHSTy = 0);
6348 QualType CheckSubtractionOperands( // C99 6.5.6
6349 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6350 QualType* CompLHSTy = 0);
6351 QualType CheckShiftOperands( // C99 6.5.7
6352 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc,
6353 bool IsCompAssign = false);
6354 QualType CheckCompareOperands( // C99 6.5.8/9
6355 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc,
6357 QualType CheckBitwiseOperands( // C99 6.5.[10...12]
6358 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
6359 bool IsCompAssign = false);
6360 QualType CheckLogicalOperands( // C99 6.5.[13,14]
6361 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc);
6362 // CheckAssignmentOperands is used for both simple and compound assignment.
6363 // For simple assignment, pass both expressions and a null converted type.
6364 // For compound assignment, pass both expressions and the converted type.
6365 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2]
6366 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType);
6368 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc,
6369 UnaryOperatorKind Opcode, Expr *Op);
6370 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc,
6371 BinaryOperatorKind Opcode,
6372 Expr *LHS, Expr *RHS);
6373 ExprResult checkPseudoObjectRValue(Expr *E);
6374 Expr *recreateSyntacticForm(PseudoObjectExpr *E);
6376 QualType CheckConditionalOperands( // C99 6.5.15
6377 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS,
6378 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc);
6379 QualType CXXCheckConditionalOperands( // C++ 5.16
6380 ExprResult &cond, ExprResult &lhs, ExprResult &rhs,
6381 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc);
6382 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2,
6383 bool *NonStandardCompositeType = 0);
6384 QualType FindCompositePointerType(SourceLocation Loc,
6385 ExprResult &E1, ExprResult &E2,
6386 bool *NonStandardCompositeType = 0) {
6387 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take();
6388 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp,
6389 NonStandardCompositeType);
6395 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS,
6396 SourceLocation QuestionLoc);
6398 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr,
6399 SourceLocation QuestionLoc);
6401 /// type checking for vector binary operators.
6402 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
6403 SourceLocation Loc, bool IsCompAssign);
6404 QualType GetSignedVectorType(QualType V);
6405 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS,
6406 SourceLocation Loc, bool isRelational);
6407 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS,
6408 SourceLocation Loc);
6410 /// type checking declaration initializers (C99 6.7.8)
6411 bool CheckForConstantInitializer(Expr *e, QualType t);
6413 // type checking C++ declaration initializers (C++ [dcl.init]).
6415 /// ReferenceCompareResult - Expresses the result of comparing two
6416 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the
6417 /// purposes of initialization by reference (C++ [dcl.init.ref]p4).
6418 enum ReferenceCompareResult {
6419 /// Ref_Incompatible - The two types are incompatible, so direct
6420 /// reference binding is not possible.
6421 Ref_Incompatible = 0,
6422 /// Ref_Related - The two types are reference-related, which means
6423 /// that their unqualified forms (T1 and T2) are either the same
6424 /// or T1 is a base class of T2.
6426 /// Ref_Compatible_With_Added_Qualification - The two types are
6427 /// reference-compatible with added qualification, meaning that
6428 /// they are reference-compatible and the qualifiers on T1 (cv1)
6429 /// are greater than the qualifiers on T2 (cv2).
6430 Ref_Compatible_With_Added_Qualification,
6431 /// Ref_Compatible - The two types are reference-compatible and
6432 /// have equivalent qualifiers (cv1 == cv2).
6436 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc,
6437 QualType T1, QualType T2,
6438 bool &DerivedToBase,
6439 bool &ObjCConversion,
6440 bool &ObjCLifetimeConversion);
6442 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType,
6443 Expr *CastExpr, CastKind &CastKind,
6444 ExprValueKind &VK, CXXCastPath &Path);
6446 /// \brief Force an expression with unknown-type to an expression of the
6448 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType);
6450 // CheckVectorCast - check type constraints for vectors.
6451 // Since vectors are an extension, there are no C standard reference for this.
6452 // We allow casting between vectors and integer datatypes of the same size.
6453 // returns true if the cast is invalid
6454 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty,
6457 // CheckExtVectorCast - check type constraints for extended vectors.
6458 // Since vectors are an extension, there are no C standard reference for this.
6459 // We allow casting between vectors and integer datatypes of the same size,
6460 // or vectors and the element type of that vector.
6461 // returns the cast expr
6462 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr,
6465 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo,
6466 SourceLocation LParenLoc,
6468 SourceLocation RParenLoc);
6470 enum ARCConversionResult { ACR_okay, ACR_unbridged };
6472 /// \brief Checks for invalid conversions and casts between
6473 /// retainable pointers and other pointer kinds.
6474 ARCConversionResult CheckObjCARCConversion(SourceRange castRange,
6475 QualType castType, Expr *&op,
6476 CheckedConversionKind CCK);
6478 Expr *stripARCUnbridgedCast(Expr *e);
6479 void diagnoseARCUnbridgedCast(Expr *e);
6481 bool CheckObjCARCUnavailableWeakConversion(QualType castType,
6484 /// checkRetainCycles - Check whether an Objective-C message send
6485 /// might create an obvious retain cycle.
6486 void checkRetainCycles(ObjCMessageExpr *msg);
6487 void checkRetainCycles(Expr *receiver, Expr *argument);
6489 /// checkUnsafeAssigns - Check whether +1 expr is being assigned
6490 /// to weak/__unsafe_unretained type.
6491 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS);
6493 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned
6494 /// to weak/__unsafe_unretained expression.
6495 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS);
6497 /// CheckMessageArgumentTypes - Check types in an Obj-C message send.
6498 /// \param Method - May be null.
6499 /// \param [out] ReturnType - The return type of the send.
6500 /// \return true iff there were any incompatible types.
6501 bool CheckMessageArgumentTypes(QualType ReceiverType,
6502 Expr **Args, unsigned NumArgs, Selector Sel,
6503 ObjCMethodDecl *Method, bool isClassMessage,
6504 bool isSuperMessage,
6505 SourceLocation lbrac, SourceLocation rbrac,
6506 QualType &ReturnType, ExprValueKind &VK);
6508 /// \brief Determine the result of a message send expression based on
6509 /// the type of the receiver, the method expected to receive the message,
6510 /// and the form of the message send.
6511 QualType getMessageSendResultType(QualType ReceiverType,
6512 ObjCMethodDecl *Method,
6513 bool isClassMessage, bool isSuperMessage);
6515 /// \brief If the given expression involves a message send to a method
6516 /// with a related result type, emit a note describing what happened.
6517 void EmitRelatedResultTypeNote(const Expr *E);
6519 /// CheckBooleanCondition - Diagnose problems involving the use of
6520 /// the given expression as a boolean condition (e.g. in an if
6521 /// statement). Also performs the standard function and array
6522 /// decays, possibly changing the input variable.
6524 /// \param Loc - A location associated with the condition, e.g. the
6526 /// \return true iff there were any errors
6527 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc);
6529 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc,
6532 /// DiagnoseAssignmentAsCondition - Given that an expression is
6533 /// being used as a boolean condition, warn if it's an assignment.
6534 void DiagnoseAssignmentAsCondition(Expr *E);
6536 /// \brief Redundant parentheses over an equality comparison can indicate
6537 /// that the user intended an assignment used as condition.
6538 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE);
6540 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid.
6541 ExprResult CheckCXXBooleanCondition(Expr *CondExpr);
6543 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have
6544 /// the specified width and sign. If an overflow occurs, detect it and emit
6545 /// the specified diagnostic.
6546 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal,
6547 unsigned NewWidth, bool NewSign,
6548 SourceLocation Loc, unsigned DiagID);
6550 /// Checks that the Objective-C declaration is declared in the global scope.
6551 /// Emits an error and marks the declaration as invalid if it's not declared
6552 /// in the global scope.
6553 bool CheckObjCDeclScope(Decl *D);
6555 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE,
6556 /// and reports the appropriate diagnostics. Returns false on success.
6557 /// Can optionally return the value of the expression.
6558 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6559 const PartialDiagnostic &Diag,
6561 const PartialDiagnostic &FoldDiag);
6562 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
6563 const PartialDiagnostic &Diag,
6564 bool AllowFold = true) {
6565 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold,
6568 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0);
6570 /// VerifyBitField - verifies that a bit field expression is an ICE and has
6571 /// the correct width, and that the field type is valid.
6572 /// Returns false on success.
6573 /// Can optionally return whether the bit-field is of width 0
6574 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName,
6575 QualType FieldTy, Expr *BitWidth,
6576 bool *ZeroWidth = 0);
6578 enum CUDAFunctionTarget {
6585 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D);
6587 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget,
6588 CUDAFunctionTarget CalleeTarget);
6590 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) {
6591 return CheckCUDATarget(IdentifyCUDATarget(Caller),
6592 IdentifyCUDATarget(Callee));
6595 /// \name Code completion
6597 /// \brief Describes the context in which code completion occurs.
6598 enum ParserCompletionContext {
6599 /// \brief Code completion occurs at top-level or namespace context.
6601 /// \brief Code completion occurs within a class, struct, or union.
6603 /// \brief Code completion occurs within an Objective-C interface, protocol,
6606 /// \brief Code completion occurs within an Objective-C implementation or
6607 /// category implementation
6608 PCC_ObjCImplementation,
6609 /// \brief Code completion occurs within the list of instance variables
6610 /// in an Objective-C interface, protocol, category, or implementation.
6611 PCC_ObjCInstanceVariableList,
6612 /// \brief Code completion occurs following one or more template
6615 /// \brief Code completion occurs following one or more template
6616 /// headers within a class.
6618 /// \brief Code completion occurs within an expression.
6620 /// \brief Code completion occurs within a statement, which may
6621 /// also be an expression or a declaration.
6623 /// \brief Code completion occurs at the beginning of the
6624 /// initialization statement (or expression) in a for loop.
6626 /// \brief Code completion occurs within the condition of an if,
6627 /// while, switch, or for statement.
6629 /// \brief Code completion occurs within the body of a function on a
6630 /// recovery path, where we do not have a specific handle on our position
6632 PCC_RecoveryInFunction,
6633 /// \brief Code completion occurs where only a type is permitted.
6635 /// \brief Code completion occurs in a parenthesized expression, which
6636 /// might also be a type cast.
6637 PCC_ParenthesizedExpression,
6638 /// \brief Code completion occurs within a sequence of declaration
6639 /// specifiers within a function, method, or block.
6640 PCC_LocalDeclarationSpecifiers
6643 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path);
6644 void CodeCompleteOrdinaryName(Scope *S,
6645 ParserCompletionContext CompletionContext);
6646 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS,
6647 bool AllowNonIdentifiers,
6648 bool AllowNestedNameSpecifiers);
6650 struct CodeCompleteExpressionData;
6651 void CodeCompleteExpression(Scope *S,
6652 const CodeCompleteExpressionData &Data);
6653 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base,
6654 SourceLocation OpLoc,
6656 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS);
6657 void CodeCompleteTag(Scope *S, unsigned TagSpec);
6658 void CodeCompleteTypeQualifiers(DeclSpec &DS);
6659 void CodeCompleteCase(Scope *S);
6660 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args);
6661 void CodeCompleteInitializer(Scope *S, Decl *D);
6662 void CodeCompleteReturn(Scope *S);
6663 void CodeCompleteAfterIf(Scope *S);
6664 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS);
6666 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS,
6667 bool EnteringContext);
6668 void CodeCompleteUsing(Scope *S);
6669 void CodeCompleteUsingDirective(Scope *S);
6670 void CodeCompleteNamespaceDecl(Scope *S);
6671 void CodeCompleteNamespaceAliasDecl(Scope *S);
6672 void CodeCompleteOperatorName(Scope *S);
6673 void CodeCompleteConstructorInitializer(Decl *Constructor,
6674 CXXCtorInitializer** Initializers,
6675 unsigned NumInitializers);
6676 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro,
6677 bool AfterAmpersand);
6679 void CodeCompleteObjCAtDirective(Scope *S);
6680 void CodeCompleteObjCAtVisibility(Scope *S);
6681 void CodeCompleteObjCAtStatement(Scope *S);
6682 void CodeCompleteObjCAtExpression(Scope *S);
6683 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS);
6684 void CodeCompleteObjCPropertyGetter(Scope *S);
6685 void CodeCompleteObjCPropertySetter(Scope *S);
6686 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
6688 void CodeCompleteObjCMessageReceiver(Scope *S);
6689 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc,
6690 IdentifierInfo **SelIdents,
6691 unsigned NumSelIdents,
6692 bool AtArgumentExpression);
6693 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver,
6694 IdentifierInfo **SelIdents,
6695 unsigned NumSelIdents,
6696 bool AtArgumentExpression,
6697 bool IsSuper = false);
6698 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver,
6699 IdentifierInfo **SelIdents,
6700 unsigned NumSelIdents,
6701 bool AtArgumentExpression,
6702 ObjCInterfaceDecl *Super = 0);
6703 void CodeCompleteObjCForCollection(Scope *S,
6704 DeclGroupPtrTy IterationVar);
6705 void CodeCompleteObjCSelector(Scope *S,
6706 IdentifierInfo **SelIdents,
6707 unsigned NumSelIdents);
6708 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols,
6709 unsigned NumProtocols);
6710 void CodeCompleteObjCProtocolDecl(Scope *S);
6711 void CodeCompleteObjCInterfaceDecl(Scope *S);
6712 void CodeCompleteObjCSuperclass(Scope *S,
6713 IdentifierInfo *ClassName,
6714 SourceLocation ClassNameLoc);
6715 void CodeCompleteObjCImplementationDecl(Scope *S);
6716 void CodeCompleteObjCInterfaceCategory(Scope *S,
6717 IdentifierInfo *ClassName,
6718 SourceLocation ClassNameLoc);
6719 void CodeCompleteObjCImplementationCategory(Scope *S,
6720 IdentifierInfo *ClassName,
6721 SourceLocation ClassNameLoc);
6722 void CodeCompleteObjCPropertyDefinition(Scope *S);
6723 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S,
6724 IdentifierInfo *PropertyName);
6725 void CodeCompleteObjCMethodDecl(Scope *S,
6726 bool IsInstanceMethod,
6727 ParsedType ReturnType);
6728 void CodeCompleteObjCMethodDeclSelector(Scope *S,
6729 bool IsInstanceMethod,
6730 bool AtParameterName,
6731 ParsedType ReturnType,
6732 IdentifierInfo **SelIdents,
6733 unsigned NumSelIdents);
6734 void CodeCompletePreprocessorDirective(bool InConditional);
6735 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S);
6736 void CodeCompletePreprocessorMacroName(bool IsDefinition);
6737 void CodeCompletePreprocessorExpression();
6738 void CodeCompletePreprocessorMacroArgument(Scope *S,
6739 IdentifierInfo *Macro,
6740 MacroInfo *MacroInfo,
6742 void CodeCompleteNaturalLanguage();
6743 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator,
6744 CodeCompletionTUInfo &CCTUInfo,
6745 SmallVectorImpl<CodeCompletionResult> &Results);
6748 //===--------------------------------------------------------------------===//
6749 // Extra semantic analysis beyond the C type system
6752 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL,
6753 unsigned ByteNo) const;
6756 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
6757 const ArraySubscriptExpr *ASE=0,
6758 bool AllowOnePastEnd=true, bool IndexNegated=false);
6759 void CheckArrayAccess(const Expr *E);
6760 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall);
6761 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc,
6762 Expr **Args, unsigned NumArgs);
6763 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall);
6765 bool CheckObjCString(Expr *Arg);
6767 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
6768 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
6770 bool SemaBuiltinVAStart(CallExpr *TheCall);
6771 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
6772 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs);
6775 // Used by C++ template instantiation.
6776 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall);
6779 bool SemaBuiltinPrefetch(CallExpr *TheCall);
6780 bool SemaBuiltinObjectSize(CallExpr *TheCall);
6781 bool SemaBuiltinLongjmp(CallExpr *TheCall);
6782 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult);
6783 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult,
6784 AtomicExpr::AtomicOp Op);
6785 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
6786 llvm::APSInt &Result);
6788 enum FormatStringType {
6797 static FormatStringType GetFormatStringType(const FormatAttr *Format);
6798 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs,
6799 bool HasVAListArg, unsigned format_idx,
6800 unsigned firstDataArg, FormatStringType Type,
6801 bool inFunctionCall = true);
6803 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr,
6804 Expr **Args, unsigned NumArgs, bool HasVAListArg,
6805 unsigned format_idx, unsigned firstDataArg,
6806 FormatStringType Type, bool inFunctionCall);
6808 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall);
6809 void CheckFormatArguments(const FormatAttr *Format, Expr **Args,
6810 unsigned NumArgs, bool IsCXXMember,
6811 SourceLocation Loc, SourceRange Range);
6812 void CheckFormatArguments(Expr **Args, unsigned NumArgs,
6813 bool HasVAListArg, unsigned format_idx,
6814 unsigned firstDataArg, FormatStringType Type,
6815 SourceLocation Loc, SourceRange range);
6817 void CheckNonNullArguments(const NonNullAttr *NonNull,
6818 const Expr * const *ExprArgs,
6819 SourceLocation CallSiteLoc);
6821 void CheckMemaccessArguments(const CallExpr *Call,
6823 IdentifierInfo *FnName);
6825 void CheckStrlcpycatArguments(const CallExpr *Call,
6826 IdentifierInfo *FnName);
6828 void CheckStrncatArguments(const CallExpr *Call,
6829 IdentifierInfo *FnName);
6831 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType,
6832 SourceLocation ReturnLoc);
6833 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS);
6834 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation());
6836 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field,
6839 /// \brief The parser's current scope.
6841 /// The parser maintains this state here.
6845 friend class Parser;
6846 friend class InitializationSequence;
6847 friend class ASTReader;
6848 friend class ASTWriter;
6851 /// \brief Retrieve the parser's current scope.
6853 /// This routine must only be used when it is certain that semantic analysis
6854 /// and the parser are in precisely the same context, which is not the case
6855 /// when, e.g., we are performing any kind of template instantiation.
6856 /// Therefore, the only safe places to use this scope are in the parser
6857 /// itself and in routines directly invoked from the parser and *never* from
6858 /// template substitution or instantiation.
6859 Scope *getCurScope() const { return CurScope; }
6861 Decl *getObjCDeclContext() const;
6863 DeclContext *getCurLexicalContext() const {
6864 return OriginalLexicalContext ? OriginalLexicalContext : CurContext;
6867 AvailabilityResult getCurContextAvailability() const;
6870 /// \brief RAII object that enters a new expression evaluation context.
6871 class EnterExpressionEvaluationContext {
6875 EnterExpressionEvaluationContext(Sema &Actions,
6876 Sema::ExpressionEvaluationContext NewContext,
6877 Decl *LambdaContextDecl = 0,
6878 bool IsDecltype = false)
6879 : Actions(Actions) {
6880 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl,
6884 ~EnterExpressionEvaluationContext() {
6885 Actions.PopExpressionEvaluationContext();
6889 } // end namespace clang