Sema.h revision ddb5a3926d715ab4354ca36117679e3f4d5d3e21
148486893f46d2e12e926682a3ecb908716bc66c4Chris Lattner//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 29769ab22265b313171d201b5928688524a01bd87Misha Brukman// 36fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// The LLVM Compiler Infrastructure 46fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 79769ab22265b313171d201b5928688524a01bd87Misha Brukman// 86fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell//===----------------------------------------------------------------------===// 9febdf58538c2510ec1c24d3a856420792c53debeChris Lattner// 10bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer// This file defines the Sema class, which performs semantic analysis and 1102dea8b39f3acad5de1df36273444d149145e7fcDan Gohman// builds ASTs. 12009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner// 13009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner//===----------------------------------------------------------------------===// 14009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 15009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#ifndef LLVM_CLANG_SEMA_SEMA_H 16009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#define LLVM_CLANG_SEMA_SEMA_H 1718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner 1818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner#include "clang/AST/Attr.h" 1943d1fd449f1a0ac9d9dafa0b9569bb6b2e976198Anton Korobeynikov#include "clang/AST/DeclarationName.h" 20ef547ddcdd6e49bb6f019ac5fb080d2f317e43a9Chris Lattner#include "clang/AST/Expr.h" 21009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#include "clang/AST/ExprObjC.h" 22d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke#include "clang/AST/ExternalASTSource.h" 23d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke#include "clang/AST/LambdaMangleContext.h" 24009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#include "clang/AST/NSAPI.h" 2512ddd409535b52a7fa5157ded9a4cedd161fedb6Benjamin Kramer#include "clang/AST/PrettyPrinter.h" 26009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#include "clang/AST/TypeLoc.h" 2718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner#include "clang/Basic/ExpressionTraits.h" 2817fcdd5e1b78b829068ca657c97357a39d6e768bChris Lattner#include "clang/Basic/LangOptions.h" 297eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Basic/Specifiers.h" 307eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Basic/TemplateKinds.h" 317eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Basic/TypeTraits.h" 327eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Lex/ModuleLoader.h" 330a0e68a7eac0513505aff3079e2d5d6864e51895Gabor Greif#include "clang/Sema/AnalysisBasedWarnings.h" 347eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/DeclSpec.h" 357eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/ExternalSemaSource.h" 367eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/IdentifierResolver.h" 377eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/LocInfoType.h" 387eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/ObjCMethodList.h" 397eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/Ownership.h" 401a31d09a16b0b8eaa08c8649bd8673ddb0ad1841Gabor Greif#include "clang/Sema/ScopeInfo.h" 417eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "clang/Sema/TypoCorrection.h" 421012919ed8b3e2cd4b421c104ce9d8f4e20ced9dGabor Greif#include "clang/Sema/Weak.h" 430a0e68a7eac0513505aff3079e2d5d6864e51895Gabor Greif#include "llvm/ADT/ArrayRef.h" 447eef1800ea8745a814b86c8610086e9f16312dcaGabor Greif#include "llvm/ADT/Optional.h" 45c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif#include "llvm/ADT/OwningPtr.h" 46c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif#include "llvm/ADT/SetVector.h" 47c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif#include "llvm/ADT/SmallPtrSet.h" 48f3841fcbd587c31aa9842b3f33bd57de40c9f443Gabor Greif#include "llvm/ADT/SmallVector.h" 490a0e68a7eac0513505aff3079e2d5d6864e51895Gabor Greif#include "llvm/MC/MCParser/MCAsmParser.h" 507309be6735666143bd9835b275dc8501617a2591Gabor Greif#include <deque> 5118961504fc2b299578dba817900a0696cf3ccc4dChris Lattner#include <string> 5218961504fc2b299578dba817900a0696cf3ccc4dChris Lattner#include <vector> 53bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer 54bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencernamespace llvm { 55bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class APSInt; 56bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer template <typename ValueT> struct DenseMapInfo; 57bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer template <typename ValueT, typename ValueInfoT> class DenseSet; 58bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class SmallBitVector; 59bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer} 60bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer 61bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencernamespace clang { 62bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class ADLResult; 63bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class ASTConsumer; 64bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class ASTContext; 65bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class ASTMutationListener; 66bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4Reid Spencer class ASTReader; 67fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman class ASTWriter; 68fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman class ArrayType; 690a0e68a7eac0513505aff3079e2d5d6864e51895Gabor Greif class AttributeList; 701fca5ff62bb2ecb5bfc8974f4dbfc56e9d3ca721Chris Lattner class BlockDecl; 7118961504fc2b299578dba817900a0696cf3ccc4dChris Lattner class CapturedDecl; 720a0e68a7eac0513505aff3079e2d5d6864e51895Gabor Greif class CXXBasePath; 73009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class CXXBasePaths; 7417fcdd5e1b78b829068ca657c97357a39d6e768bChris Lattner class CXXBindTemporaryExpr; 7518961504fc2b299578dba817900a0696cf3ccc4dChris Lattner typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 76fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class CXXConstructorDecl; 7717fcdd5e1b78b829068ca657c97357a39d6e768bChris Lattner class CXXConversionDecl; 78009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class CXXDestructorDecl; 7918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner class CXXFieldCollector; 8018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner class CXXMemberCallExpr; 81009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class CXXMethodDecl; 82fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class CXXScopeSpec; 833fb57b691d21e582ed18ffe6477e8f5548b4ad6aChris Lattner class CXXTemporary; 843fb57b691d21e582ed18ffe6477e8f5548b4ad6aChris Lattner class CXXTryStmt; 85fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class CallExpr; 861d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson class ClassTemplateDecl; 871d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson class ClassTemplatePartialSpecializationDecl; 88051a950000e21935165db56695e35bade668193bGabor Greif class ClassTemplateSpecializationDecl; 89f7e8b5c72245e2dc97539009236c651a814d909fErick Tryzelaar class CodeCompleteConsumer; 90e922c0201916e0b980ab3cfe91e1413e68d55647Owen Anderson class CodeCompletionAllocator; 910a205a459884ec745df1c529396dd921f029dafdOwen Anderson class CodeCompletionTUInfo; 92051a950000e21935165db56695e35bade668193bGabor Greif class CodeCompletionResult; 93051a950000e21935165db56695e35bade668193bGabor Greif class Decl; 94051a950000e21935165db56695e35bade668193bGabor Greif class DeclAccessPair; 95051a950000e21935165db56695e35bade668193bGabor Greif class DeclContext; 96e9a393be13282f92f01d1a8f0703005e95b8c4e6Matthijs Kooijman class DeclRefExpr; 97e9a393be13282f92f01d1a8f0703005e95b8c4e6Matthijs Kooijman class DeclaratorDecl; 98e9a393be13282f92f01d1a8f0703005e95b8c4e6Matthijs Kooijman class DeducedTemplateArgument; 991d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson class DependentDiagnostic; 1001d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson class DesignatedInitExpr; 1011d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson class Designation; 102051a950000e21935165db56695e35bade668193bGabor Greif class EnumConstantDecl; 103afba8fe662d65b25b4baf46bb26cc18e1f9cc0a5Gordon Henriksen class Expr; 104009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class ExtVectorType; 105fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class ExternalSemaSource; 106fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class FormatAttr; 10717fcdd5e1b78b829068ca657c97357a39d6e768bChris Lattner class FriendDecl; 10817fcdd5e1b78b829068ca657c97357a39d6e768bChris Lattner class FunctionDecl; 109009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class FunctionProtoType; 110280a6e607d8eb7401749a92db624a82de47da777Nick Lewycky class FunctionTemplateDecl; 11112f7cab423728180717ac94f612a561ba4fea77bDan Gohman class ImplicitConversionSequence; 11212f7cab423728180717ac94f612a561ba4fea77bDan Gohman class InitListExpr; 113280a6e607d8eb7401749a92db624a82de47da777Nick Lewycky class InitializationKind; 114280a6e607d8eb7401749a92db624a82de47da777Nick Lewycky class InitializationSequence; 115280a6e607d8eb7401749a92db624a82de47da777Nick Lewycky class InitializedEntity; 11626199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class IntegerLiteral; 11726199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class LabelStmt; 11826199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class LambdaExpr; 11926199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class LangOptions; 120009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner class LocalInstantiationScope; 12150cdabcfd52e88381ade61450d98a1c757195befDan Gohman class LookupResult; 122dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class MacroInfo; 123dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class MultiLevelTemplateArgumentList; 124dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class NamedDecl; 125dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class NonNullAttr; 126dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class ObjCCategoryDecl; 127dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class ObjCCategoryImplDecl; 128dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class ObjCCompatibleAliasDecl; 12902dea8b39f3acad5de1df36273444d149145e7fcDan Gohman class ObjCContainerDecl; 13002dea8b39f3acad5de1df36273444d149145e7fcDan Gohman class ObjCImplDecl; 13102dea8b39f3acad5de1df36273444d149145e7fcDan Gohman class ObjCImplementationDecl; 132dd49dbfe44098eb53b1ac29f017e422147572bbbVladimir Prus class ObjCInterfaceDecl; 133b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class ObjCIvarDecl; 134b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner template <class T> class ObjCList; 135b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class ObjCMessageExpr; 136b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class ObjCMethodDecl; 137b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class ObjCPropertyDecl; 138b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class ObjCProtocolDecl; 139b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class OMPThreadPrivateDecl; 140b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class OverloadCandidateSet; 141b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class OverloadExpr; 14207216eabb7e749dc38f521e73485db553cefc8d4Chris Lattner class ParenListExpr; 143a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class ParmVarDecl; 144a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class Preprocessor; 14507216eabb7e749dc38f521e73485db553cefc8d4Chris Lattner class PseudoDestructorTypeStorage; 146a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class PseudoObjectExpr; 147a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class QualType; 148a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class StandardConversionSequence; 149a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class Stmt; 150a71965b1adf6bfeddfd3b38fdf7df9b4412bc6c2Chris Lattner class StringLiteral; 151b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class SwitchStmt; 152ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TargetAttributesSema; 153ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TemplateArgument; 154ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TemplateArgumentList; 155ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TemplateArgumentLoc; 156ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TemplateDecl; 157ad993cbb77b26b36cee938686b3377c0d92abd5eChris Lattner class TemplateParameterList; 158b92f50fe6091a7a12f54f9884529b1127b1a14e5Chris Lattner class TemplatePartialOrderingContext; 15987f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class TemplateTemplateParmDecl; 16087f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class Token; 16187f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class TypeAliasDecl; 1629053a739e50cb6f6b68268cc7c6b95146e66d396Torok Edwin class TypedefDecl; 1639053a739e50cb6f6b68268cc7c6b95146e66d396Torok Edwin class TypedefNameDecl; 16487f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class TypeLoc; 16587f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class UnqualifiedId; 16687f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class UnresolvedLookupExpr; 16787f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class UnresolvedMemberExpr; 16887f1e7796d02ea991bdbf084f312879988732a26Torok Edwin class UnresolvedSetImpl; 1691020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class UnresolvedSetIterator; 170fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class UsingDecl; 171fab8c796f6754962f5732145248303e3a1f7b96bChris Lattner class UsingShadowDecl; 1721020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class ValueDecl; 1731020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class VarDecl; 1741020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class VisibilityAttr; 1751020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class VisibleDeclConsumer; 1761020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class IndirectFieldDecl; 177c063502e326fe0206942192773b263a3d88d93f5Chris Lattner 1781020b3982c9eae15844c5612b0cf251917931b1dChris Lattnernamespace sema { 17918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner class AccessedEntity; 18018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner class BlockScopeInfo; 181a4c6c522ee029e97aedccb6ee7cca912d52a5599Misha Brukman class CapturedRegionScopeInfo; 182a4c6c522ee029e97aedccb6ee7cca912d52a5599Misha Brukman class CapturingScopeInfo; 1831020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class CompoundScopeInfo; 18426199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class DelayedDiagnostic; 18526199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class DelayedDiagnosticPool; 18626199059268a05739c84ebf465fcdbf7ded861dfChris Lattner class FunctionScopeInfo; 1871020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class LambdaScopeInfo; 1881020b3982c9eae15844c5612b0cf251917931b1dChris Lattner class PossiblyUnreachableDiag; 1890dd2a6a89f49438b239638ab147ac5746d6c32c3Gabor Greif class TemplateDeductionInfo; 1900dd2a6a89f49438b239638ab147ac5746d6c32c3Gabor Greif} 191b547a181005cc255fa57c61c1c0dbafca5375fb4Gabor Greif 192b547a181005cc255fa57c61c1c0dbafca5375fb4Gabor Greif// FIXME: No way to easily map from TemplateTypeParmTypes to 193b547a181005cc255fa57c61c1c0dbafca5375fb4Gabor Greif// TemplateTypeParmDecls, so we have this horrible PointerUnion. 1941020b3982c9eae15844c5612b0cf251917931b1dChris Lattnertypedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 1950dd2a6a89f49438b239638ab147ac5746d6c32c3Gabor Greif SourceLocation> UnexpandedParameterPack; 1960dd2a6a89f49438b239638ab147ac5746d6c32c3Gabor Greif 1970dd2a6a89f49438b239638ab147ac5746d6c32c3Gabor Greif/// Sema - This implements semantic analysis and AST building for C. 19826199059268a05739c84ebf465fcdbf7ded861dfChris Lattnerclass Sema { 19970cfe13f19e91a595808ed6c6ff7e87ff0dccd64Chris Lattner Sema(const Sema &) LLVM_DELETED_FUNCTION; 200b00c582b6d40e6b9ff2d1ed4f5eaf7930e792aceChris Lattner void operator=(const Sema &) LLVM_DELETED_FUNCTION; 201a1a702cdd23221e6e3f36632be91150138958e9dDan Gohman mutable const TargetAttributesSema* TheTargetAttributesSema; 2029636a91649f168f41b477cba705287665e054f79Chris Lattner 2039636a91649f168f41b477cba705287665e054f79Chris Lattner ///\brief Source of additional semantic information. 20426199059268a05739c84ebf465fcdbf7ded861dfChris Lattner ExternalSemaSource *ExternalSource; 20526199059268a05739c84ebf465fcdbf7ded861dfChris Lattner 20626199059268a05739c84ebf465fcdbf7ded861dfChris Lattner ///\brief Whether Sema has generated a multiplexer and has to delete it. 20726199059268a05739c84ebf465fcdbf7ded861dfChris Lattner bool isMultiplexExternalSource; 20826199059268a05739c84ebf465fcdbf7ded861dfChris Lattner 2099769ab22265b313171d201b5928688524a01bd87Misha Brukman static bool mightHaveNonExternalLinkage(const DeclaratorDecl *FD); 21026199059268a05739c84ebf465fcdbf7ded861dfChris Lattner 21126199059268a05739c84ebf465fcdbf7ded861dfChris Lattner static bool 212009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner shouldLinkPossiblyHiddenDecl(const NamedDecl *Old, const NamedDecl *New) { 213009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner // We are about to link these. It is now safe to compute the linkage of 21426199059268a05739c84ebf465fcdbf7ded861dfChris Lattner // the new decl. If the new decl has external linkage, we will 21526199059268a05739c84ebf465fcdbf7ded861dfChris Lattner // link it with the hidden decl (which also has external linkage) and 2169769ab22265b313171d201b5928688524a01bd87Misha Brukman // it will keep having external linkage. If it has internal linkage, we 21726199059268a05739c84ebf465fcdbf7ded861dfChris Lattner // will not link it. Since it has no previous decls, it will remain 21826199059268a05739c84ebf465fcdbf7ded861dfChris Lattner // with internal linkage. 21926199059268a05739c84ebf465fcdbf7ded861dfChris Lattner return !Old->isHidden() || New->isExternallyVisible(); 220280a6e607d8eb7401749a92db624a82de47da777Nick Lewycky } 2217b6f5a3ee9a68d0f6206b1695f71551a467e33c4Chris Lattner 22226199059268a05739c84ebf465fcdbf7ded861dfChris Lattnerpublic: 22326199059268a05739c84ebf465fcdbf7ded861dfChris Lattner typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 22426199059268a05739c84ebf465fcdbf7ded861dfChris Lattner typedef OpaquePtr<TemplateName> TemplateTy; 2259eb59ec548b861d6ede05b4e6dc22aabf645e665Jeff Cohen typedef OpaquePtr<QualType> TypeTy; 22605bb8831d3cd5299ba8e0c3fecfd7cf682f0ace1Reid Spencer 22705bb8831d3cd5299ba8e0c3fecfd7cf682f0ace1Reid Spencer OpenCLOptions OpenCLFeatures; 22826199059268a05739c84ebf465fcdbf7ded861dfChris Lattner FPOptions FPFeatures; 2299769ab22265b313171d201b5928688524a01bd87Misha Brukman 23026199059268a05739c84ebf465fcdbf7ded861dfChris Lattner const LangOptions &LangOpts; 23126199059268a05739c84ebf465fcdbf7ded861dfChris Lattner Preprocessor &PP; 23226199059268a05739c84ebf465fcdbf7ded861dfChris Lattner ASTContext &Context; 23326199059268a05739c84ebf465fcdbf7ded861dfChris Lattner ASTConsumer &Consumer; 2346e0d1cb30957a636c53158d3089e6fb88348a57aDaniel Dunbar DiagnosticsEngine &Diags; 235009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner SourceManager &SourceMgr; 236009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 237d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke /// \brief Flag indicating whether or not to collect detailed statistics. 238d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke bool CollectStats; 239009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 240 /// \brief Code-completion consumer. 241 CodeCompleteConsumer *CodeCompleter; 242 243 /// CurContext - This is the current declaration context of parsing. 244 DeclContext *CurContext; 245 246 /// \brief Generally null except when we temporarily switch decl contexts, 247 /// like in \see ActOnObjCTemporaryExitContainerContext. 248 DeclContext *OriginalLexicalContext; 249 250 /// VAListTagName - The declaration name corresponding to __va_list_tag. 251 /// This is used as part of a hack to omit that class from ADL results. 252 DeclarationName VAListTagName; 253 254 /// PackContext - Manages the stack for \#pragma pack. An alignment 255 /// of 0 indicates default alignment. 256 void *PackContext; // Really a "PragmaPackStack*" 257 258 bool MSStructPragmaOn; // True when \#pragma ms_struct on 259 260 /// VisContext - Manages the stack for \#pragma GCC visibility. 261 void *VisContext; // Really a "PragmaVisStack*" 262 263 /// \brief Flag indicating if Sema is building a recovery call expression. 264 /// 265 /// This flag is used to avoid building recovery call expressions 266 /// if Sema is already doing so, which would cause infinite recursions. 267 bool IsBuildingRecoveryCallExpr; 268 269 /// ExprNeedsCleanups - True if the current evaluation context 270 /// requires cleanups to be run at its conclusion. 271 bool ExprNeedsCleanups; 272 273 /// ExprCleanupObjects - This is the stack of objects requiring 274 /// cleanup that are created by the current full expression. The 275 /// element type here is ExprWithCleanups::Object. 276 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 277 278 llvm::SmallPtrSet<Expr*, 2> MaybeODRUseExprs; 279 280 /// \brief Stack containing information about each of the nested 281 /// function, block, and method scopes that are currently active. 282 /// 283 /// This array is never empty. Clients should ignore the first 284 /// element, which is used to cache a single FunctionScopeInfo 285 /// that's used to parse every top-level function. 286 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 287 288 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 289 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 290 ExtVectorDeclsType; 291 292 /// ExtVectorDecls - This is a list all the extended vector types. This allows 293 /// us to associate a raw vector type with one of the ext_vector type names. 294 /// This is only necessary for issuing pretty diagnostics. 295 ExtVectorDeclsType ExtVectorDecls; 296 297 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 298 OwningPtr<CXXFieldCollector> FieldCollector; 299 300 typedef llvm::SmallSetVector<const NamedDecl*, 16> NamedDeclSetType; 301 302 /// \brief Set containing all declared private fields that are not used. 303 NamedDeclSetType UnusedPrivateFields; 304 305 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 306 307 /// PureVirtualClassDiagSet - a set of class declarations which we have 308 /// emitted a list of pure virtual functions. Used to prevent emitting the 309 /// same list more than once. 310 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 311 312 /// ParsingInitForAutoVars - a set of declarations with auto types for which 313 /// we are currently parsing the initializer. 314 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 315 316 /// \brief A mapping from external names to the most recent 317 /// locally-scoped extern "C" declaration with that name. 318 /// 319 /// This map contains external declarations introduced in local 320 /// scopes, e.g., 321 /// 322 /// \code 323 /// extern "C" void f() { 324 /// void foo(int, int); 325 /// } 326 /// \endcode 327 /// 328 /// Here, the name "foo" will be associated with the declaration of 329 /// "foo" within f. This name is not visible outside of 330 /// "f". However, we still find it in two cases: 331 /// 332 /// - If we are declaring another global or extern "C" entity with 333 /// the name "foo", we can find "foo" as a previous declaration, 334 /// so that the types of this external declaration can be checked 335 /// for compatibility. 336 /// 337 /// - If we would implicitly declare "foo" (e.g., due to a call to 338 /// "foo" in C when no prototype or definition is visible), then 339 /// we find this declaration of "foo" and complain that it is 340 /// not visible. 341 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternCDecls; 342 343 /// \brief Look for a locally scoped extern "C" declaration by the given name. 344 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 345 findLocallyScopedExternCDecl(DeclarationName Name); 346 347 typedef LazyVector<VarDecl *, ExternalSemaSource, 348 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 349 TentativeDefinitionsType; 350 351 /// \brief All the tentative definitions encountered in the TU. 352 TentativeDefinitionsType TentativeDefinitions; 353 354 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 355 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 356 UnusedFileScopedDeclsType; 357 358 /// \brief The set of file scoped decls seen so far that have not been used 359 /// and must warn if not used. Only contains the first declaration. 360 UnusedFileScopedDeclsType UnusedFileScopedDecls; 361 362 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 363 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 364 DelegatingCtorDeclsType; 365 366 /// \brief All the delegating constructors seen so far in the file, used for 367 /// cycle detection at the end of the TU. 368 DelegatingCtorDeclsType DelegatingCtorDecls; 369 370 /// \brief All the destructors seen during a class definition that had their 371 /// exception spec computation delayed because it depended on an unparsed 372 /// exception spec. 373 SmallVector<CXXDestructorDecl*, 2> DelayedDestructorExceptionSpecs; 374 375 /// \brief All the overriding destructors seen during a class definition 376 /// (there could be multiple due to nested classes) that had their exception 377 /// spec checks delayed, plus the overridden destructor. 378 SmallVector<std::pair<const CXXDestructorDecl*, 379 const CXXDestructorDecl*>, 2> 380 DelayedDestructorExceptionSpecChecks; 381 382 /// \brief All the members seen during a class definition which were both 383 /// explicitly defaulted and had explicitly-specified exception 384 /// specifications, along with the function type containing their 385 /// user-specified exception specification. Those exception specifications 386 /// were overridden with the default specifications, but we still need to 387 /// check whether they are compatible with the default specification, and 388 /// we can't do that until the nesting set of class definitions is complete. 389 SmallVector<std::pair<CXXMethodDecl*, const FunctionProtoType*>, 2> 390 DelayedDefaultedMemberExceptionSpecs; 391 392 /// \brief Callback to the parser to parse templated functions when needed. 393 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 394 LateTemplateParserCB *LateTemplateParser; 395 void *OpaqueParser; 396 397 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 398 LateTemplateParser = LTP; 399 OpaqueParser = P; 400 } 401 402 class DelayedDiagnostics; 403 404 class DelayedDiagnosticsState { 405 sema::DelayedDiagnosticPool *SavedPool; 406 friend class Sema::DelayedDiagnostics; 407 }; 408 typedef DelayedDiagnosticsState ParsingDeclState; 409 typedef DelayedDiagnosticsState ProcessingContextState; 410 411 /// A class which encapsulates the logic for delaying diagnostics 412 /// during parsing and other processing. 413 class DelayedDiagnostics { 414 /// \brief The current pool of diagnostics into which delayed 415 /// diagnostics should go. 416 sema::DelayedDiagnosticPool *CurPool; 417 418 public: 419 DelayedDiagnostics() : CurPool(0) {} 420 421 /// Adds a delayed diagnostic. 422 void add(const sema::DelayedDiagnostic &diag); // in DelayedDiagnostic.h 423 424 /// Determines whether diagnostics should be delayed. 425 bool shouldDelayDiagnostics() { return CurPool != 0; } 426 427 /// Returns the current delayed-diagnostics pool. 428 sema::DelayedDiagnosticPool *getCurrentPool() const { 429 return CurPool; 430 } 431 432 /// Enter a new scope. Access and deprecation diagnostics will be 433 /// collected in this pool. 434 DelayedDiagnosticsState push(sema::DelayedDiagnosticPool &pool) { 435 DelayedDiagnosticsState state; 436 state.SavedPool = CurPool; 437 CurPool = &pool; 438 return state; 439 } 440 441 /// Leave a delayed-diagnostic state that was previously pushed. 442 /// Do not emit any of the diagnostics. This is performed as part 443 /// of the bookkeeping of popping a pool "properly". 444 void popWithoutEmitting(DelayedDiagnosticsState state) { 445 CurPool = state.SavedPool; 446 } 447 448 /// Enter a new scope where access and deprecation diagnostics are 449 /// not delayed. 450 DelayedDiagnosticsState pushUndelayed() { 451 DelayedDiagnosticsState state; 452 state.SavedPool = CurPool; 453 CurPool = 0; 454 return state; 455 } 456 457 /// Undo a previous pushUndelayed(). 458 void popUndelayed(DelayedDiagnosticsState state) { 459 assert(CurPool == NULL); 460 CurPool = state.SavedPool; 461 } 462 } DelayedDiagnostics; 463 464 /// A RAII object to temporarily push a declaration context. 465 class ContextRAII { 466 private: 467 Sema &S; 468 DeclContext *SavedContext; 469 ProcessingContextState SavedContextState; 470 QualType SavedCXXThisTypeOverride; 471 472 public: 473 ContextRAII(Sema &S, DeclContext *ContextToPush) 474 : S(S), SavedContext(S.CurContext), 475 SavedContextState(S.DelayedDiagnostics.pushUndelayed()), 476 SavedCXXThisTypeOverride(S.CXXThisTypeOverride) 477 { 478 assert(ContextToPush && "pushing null context"); 479 S.CurContext = ContextToPush; 480 } 481 482 void pop() { 483 if (!SavedContext) return; 484 S.CurContext = SavedContext; 485 S.DelayedDiagnostics.popUndelayed(SavedContextState); 486 S.CXXThisTypeOverride = SavedCXXThisTypeOverride; 487 SavedContext = 0; 488 } 489 490 ~ContextRAII() { 491 pop(); 492 } 493 }; 494 495 /// \brief RAII object to handle the state changes required to synthesize 496 /// a function body. 497 class SynthesizedFunctionScope { 498 Sema &S; 499 Sema::ContextRAII SavedContext; 500 501 public: 502 SynthesizedFunctionScope(Sema &S, DeclContext *DC) 503 : S(S), SavedContext(S, DC) 504 { 505 S.PushFunctionScope(); 506 S.PushExpressionEvaluationContext(Sema::PotentiallyEvaluated); 507 } 508 509 ~SynthesizedFunctionScope() { 510 S.PopExpressionEvaluationContext(); 511 S.PopFunctionScopeInfo(); 512 } 513 }; 514 515 /// WeakUndeclaredIdentifiers - Identifiers contained in 516 /// \#pragma weak before declared. rare. may alias another 517 /// identifier, declared or undeclared 518 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 519 520 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 521 /// \#pragma redefine_extname before declared. Used in Solaris system headers 522 /// to define functions that occur in multiple standards to call the version 523 /// in the currently selected standard. 524 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 525 526 527 /// \brief Load weak undeclared identifiers from the external source. 528 void LoadExternalWeakUndeclaredIdentifiers(); 529 530 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 531 /// \#pragma weak during processing of other Decls. 532 /// I couldn't figure out a clean way to generate these in-line, so 533 /// we store them here and handle separately -- which is a hack. 534 /// It would be best to refactor this. 535 SmallVector<Decl*,2> WeakTopLevelDecl; 536 537 IdentifierResolver IdResolver; 538 539 /// Translation Unit Scope - useful to Objective-C actions that need 540 /// to lookup file scope declarations in the "ordinary" C decl namespace. 541 /// For example, user-defined classes, built-in "id" type, etc. 542 Scope *TUScope; 543 544 /// \brief The C++ "std" namespace, where the standard library resides. 545 LazyDeclPtr StdNamespace; 546 547 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 548 /// standard library. 549 LazyDeclPtr StdBadAlloc; 550 551 /// \brief The C++ "std::initializer_list" template, which is defined in 552 /// \<initializer_list>. 553 ClassTemplateDecl *StdInitializerList; 554 555 /// \brief The C++ "type_info" declaration, which is defined in \<typeinfo>. 556 RecordDecl *CXXTypeInfoDecl; 557 558 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 559 RecordDecl *MSVCGuidDecl; 560 561 /// \brief Caches identifiers/selectors for NSFoundation APIs. 562 OwningPtr<NSAPI> NSAPIObj; 563 564 /// \brief The declaration of the Objective-C NSNumber class. 565 ObjCInterfaceDecl *NSNumberDecl; 566 567 /// \brief Pointer to NSNumber type (NSNumber *). 568 QualType NSNumberPointer; 569 570 /// \brief The Objective-C NSNumber methods used to create NSNumber literals. 571 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; 572 573 /// \brief The declaration of the Objective-C NSString class. 574 ObjCInterfaceDecl *NSStringDecl; 575 576 /// \brief Pointer to NSString type (NSString *). 577 QualType NSStringPointer; 578 579 /// \brief The declaration of the stringWithUTF8String: method. 580 ObjCMethodDecl *StringWithUTF8StringMethod; 581 582 /// \brief The declaration of the Objective-C NSArray class. 583 ObjCInterfaceDecl *NSArrayDecl; 584 585 /// \brief The declaration of the arrayWithObjects:count: method. 586 ObjCMethodDecl *ArrayWithObjectsMethod; 587 588 /// \brief The declaration of the Objective-C NSDictionary class. 589 ObjCInterfaceDecl *NSDictionaryDecl; 590 591 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method. 592 ObjCMethodDecl *DictionaryWithObjectsMethod; 593 594 /// \brief id<NSCopying> type. 595 QualType QIDNSCopying; 596 597 /// \brief will hold 'respondsToSelector:' 598 Selector RespondsToSelectorSel; 599 600 /// A flag to remember whether the implicit forms of operator new and delete 601 /// have been declared. 602 bool GlobalNewDeleteDeclared; 603 604 /// A flag to indicate that we're in a context that permits abstract 605 /// references to fields. This is really a 606 bool AllowAbstractFieldReference; 607 608 /// \brief Describes how the expressions currently being parsed are 609 /// evaluated at run-time, if at all. 610 enum ExpressionEvaluationContext { 611 /// \brief The current expression and its subexpressions occur within an 612 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 613 /// \c sizeof, where the type of the expression may be significant but 614 /// no code will be generated to evaluate the value of the expression at 615 /// run time. 616 Unevaluated, 617 618 /// \brief The current expression occurs within an unevaluated 619 /// operand that unconditionally permits abstract references to 620 /// fields, such as a SIZE operator in MS-style inline assembly. 621 UnevaluatedAbstract, 622 623 /// \brief The current context is "potentially evaluated" in C++11 terms, 624 /// but the expression is evaluated at compile-time (like the values of 625 /// cases in a switch statment). 626 ConstantEvaluated, 627 628 /// \brief The current expression is potentially evaluated at run time, 629 /// which means that code may be generated to evaluate the value of the 630 /// expression at run time. 631 PotentiallyEvaluated, 632 633 /// \brief The current expression is potentially evaluated, but any 634 /// declarations referenced inside that expression are only used if 635 /// in fact the current expression is used. 636 /// 637 /// This value is used when parsing default function arguments, for which 638 /// we would like to provide diagnostics (e.g., passing non-POD arguments 639 /// through varargs) but do not want to mark declarations as "referenced" 640 /// until the default argument is used. 641 PotentiallyEvaluatedIfUsed 642 }; 643 644 /// \brief Data structure used to record current or nested 645 /// expression evaluation contexts. 646 struct ExpressionEvaluationContextRecord { 647 /// \brief The expression evaluation context. 648 ExpressionEvaluationContext Context; 649 650 /// \brief Whether the enclosing context needed a cleanup. 651 bool ParentNeedsCleanups; 652 653 /// \brief Whether we are in a decltype expression. 654 bool IsDecltype; 655 656 /// \brief The number of active cleanup objects when we entered 657 /// this expression evaluation context. 658 unsigned NumCleanupObjects; 659 660 llvm::SmallPtrSet<Expr*, 2> SavedMaybeODRUseExprs; 661 662 /// \brief The lambdas that are present within this context, if it 663 /// is indeed an unevaluated context. 664 SmallVector<LambdaExpr *, 2> Lambdas; 665 666 /// \brief The declaration that provides context for the lambda expression 667 /// if the normal declaration context does not suffice, e.g., in a 668 /// default function argument. 669 Decl *LambdaContextDecl; 670 671 /// \brief The context information used to mangle lambda expressions 672 /// within this context. 673 /// 674 /// This mangling information is allocated lazily, since most contexts 675 /// do not have lambda expressions. 676 IntrusiveRefCntPtr<LambdaMangleContext> LambdaMangle; 677 678 /// \brief If we are processing a decltype type, a set of call expressions 679 /// for which we have deferred checking the completeness of the return type. 680 SmallVector<CallExpr *, 8> DelayedDecltypeCalls; 681 682 /// \brief If we are processing a decltype type, a set of temporary binding 683 /// expressions for which we have deferred checking the destructor. 684 SmallVector<CXXBindTemporaryExpr *, 8> DelayedDecltypeBinds; 685 686 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 687 unsigned NumCleanupObjects, 688 bool ParentNeedsCleanups, 689 Decl *LambdaContextDecl, 690 bool IsDecltype) 691 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 692 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 693 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 694 695 /// \brief Retrieve the mangling context for lambdas. 696 LambdaMangleContext &getLambdaMangleContext() { 697 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 698 if (!LambdaMangle) 699 LambdaMangle = new LambdaMangleContext; 700 return *LambdaMangle; 701 } 702 703 bool isUnevaluated() const { 704 return Context == Unevaluated || Context == UnevaluatedAbstract; 705 } 706 }; 707 708 /// A stack of expression evaluation contexts. 709 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 710 711 /// SpecialMemberOverloadResult - The overloading result for a special member 712 /// function. 713 /// 714 /// This is basically a wrapper around PointerIntPair. The lowest bits of the 715 /// integer are used to determine whether overload resolution succeeded. 716 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 717 public: 718 enum Kind { 719 NoMemberOrDeleted, 720 Ambiguous, 721 Success 722 }; 723 724 private: 725 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 726 727 public: 728 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 729 : FastFoldingSetNode(ID) 730 {} 731 732 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 733 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 734 735 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); } 736 void setKind(Kind K) { Pair.setInt(K); } 737 }; 738 739 /// \brief A cache of special member function overload resolution results 740 /// for C++ records. 741 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 742 743 /// \brief The kind of translation unit we are processing. 744 /// 745 /// When we're processing a complete translation unit, Sema will perform 746 /// end-of-translation-unit semantic tasks (such as creating 747 /// initializers for tentative definitions in C) once parsing has 748 /// completed. Modules and precompiled headers perform different kinds of 749 /// checks. 750 TranslationUnitKind TUKind; 751 752 llvm::BumpPtrAllocator BumpAlloc; 753 754 /// \brief The number of SFINAE diagnostics that have been trapped. 755 unsigned NumSFINAEErrors; 756 757 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 758 UnparsedDefaultArgInstantiationsMap; 759 760 /// \brief A mapping from parameters with unparsed default arguments to the 761 /// set of instantiations of each parameter. 762 /// 763 /// This mapping is a temporary data structure used when parsing 764 /// nested class templates or nested classes of class templates, 765 /// where we might end up instantiating an inner class before the 766 /// default arguments of its methods have been parsed. 767 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 768 769 // Contains the locations of the beginning of unparsed default 770 // argument locations. 771 llvm::DenseMap<ParmVarDecl *, SourceLocation> UnparsedDefaultArgLocs; 772 773 /// UndefinedInternals - all the used, undefined objects which require a 774 /// definition in this translation unit. 775 llvm::DenseMap<NamedDecl *, SourceLocation> UndefinedButUsed; 776 777 /// Obtain a sorted list of functions that are undefined but ODR-used. 778 void getUndefinedButUsed( 779 llvm::SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined); 780 781 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 782 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 783 784 /// Method Pool - allows efficient lookup when typechecking messages to "id". 785 /// We need to maintain a list, since selectors can have differing signatures 786 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 787 /// of selectors are "overloaded"). 788 /// At the head of the list it is recorded whether there were 0, 1, or >= 2 789 /// methods inside categories with a particular selector. 790 GlobalMethodPool MethodPool; 791 792 /// Method selectors used in a \@selector expression. Used for implementation 793 /// of -Wselector. 794 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 795 796 /// Kinds of C++ special members. 797 enum CXXSpecialMember { 798 CXXDefaultConstructor, 799 CXXCopyConstructor, 800 CXXMoveConstructor, 801 CXXCopyAssignment, 802 CXXMoveAssignment, 803 CXXDestructor, 804 CXXInvalid 805 }; 806 807 typedef std::pair<CXXRecordDecl*, CXXSpecialMember> SpecialMemberDecl; 808 809 /// The C++ special members which we are currently in the process of 810 /// declaring. If this process recursively triggers the declaration of the 811 /// same special member, we should act as if it is not yet declared. 812 llvm::SmallSet<SpecialMemberDecl, 4> SpecialMembersBeingDeclared; 813 814 void ReadMethodPool(Selector Sel); 815 816 /// Private Helper predicate to check for 'self'. 817 bool isSelfExpr(Expr *RExpr); 818 819 /// \brief Cause the active diagnostic on the DiagosticsEngine to be 820 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and 821 /// should not be used elsewhere. 822 void EmitCurrentDiagnostic(unsigned DiagID); 823 824 /// Records and restores the FP_CONTRACT state on entry/exit of compound 825 /// statements. 826 class FPContractStateRAII { 827 public: 828 FPContractStateRAII(Sema& S) 829 : S(S), OldFPContractState(S.FPFeatures.fp_contract) {} 830 ~FPContractStateRAII() { 831 S.FPFeatures.fp_contract = OldFPContractState; 832 } 833 private: 834 Sema& S; 835 bool OldFPContractState : 1; 836 }; 837 838 typedef llvm::MCAsmParserSemaCallback::InlineAsmIdentifierInfo 839 InlineAsmIdentifierInfo; 840 841public: 842 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 843 TranslationUnitKind TUKind = TU_Complete, 844 CodeCompleteConsumer *CompletionConsumer = 0); 845 ~Sema(); 846 847 /// \brief Perform initialization that occurs after the parser has been 848 /// initialized but before it parses anything. 849 void Initialize(); 850 851 const LangOptions &getLangOpts() const { return LangOpts; } 852 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 853 FPOptions &getFPOptions() { return FPFeatures; } 854 855 DiagnosticsEngine &getDiagnostics() const { return Diags; } 856 SourceManager &getSourceManager() const { return SourceMgr; } 857 const TargetAttributesSema &getTargetAttributesSema() const; 858 Preprocessor &getPreprocessor() const { return PP; } 859 ASTContext &getASTContext() const { return Context; } 860 ASTConsumer &getASTConsumer() const { return Consumer; } 861 ASTMutationListener *getASTMutationListener() const; 862 ExternalSemaSource* getExternalSource() const { return ExternalSource; } 863 864 ///\brief Registers an external source. If an external source already exists, 865 /// creates a multiplex external source and appends to it. 866 /// 867 ///\param[in] E - A non-null external sema source. 868 /// 869 void addExternalSource(ExternalSemaSource *E); 870 871 void PrintStats() const; 872 873 /// \brief Helper class that creates diagnostics with optional 874 /// template instantiation stacks. 875 /// 876 /// This class provides a wrapper around the basic DiagnosticBuilder 877 /// class that emits diagnostics. SemaDiagnosticBuilder is 878 /// responsible for emitting the diagnostic (as DiagnosticBuilder 879 /// does) and, if the diagnostic comes from inside a template 880 /// instantiation, printing the template instantiation stack as 881 /// well. 882 class SemaDiagnosticBuilder : public DiagnosticBuilder { 883 Sema &SemaRef; 884 unsigned DiagID; 885 886 public: 887 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 888 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 889 890 ~SemaDiagnosticBuilder() { 891 // If we aren't active, there is nothing to do. 892 if (!isActive()) return; 893 894 // Otherwise, we need to emit the diagnostic. First flush the underlying 895 // DiagnosticBuilder data, and clear the diagnostic builder itself so it 896 // won't emit the diagnostic in its own destructor. 897 // 898 // This seems wasteful, in that as written the DiagnosticBuilder dtor will 899 // do its own needless checks to see if the diagnostic needs to be 900 // emitted. However, because we take care to ensure that the builder 901 // objects never escape, a sufficiently smart compiler will be able to 902 // eliminate that code. 903 FlushCounts(); 904 Clear(); 905 906 // Dispatch to Sema to emit the diagnostic. 907 SemaRef.EmitCurrentDiagnostic(DiagID); 908 } 909 910 /// Teach operator<< to produce an object of the correct type. 911 template<typename T> 912 friend const SemaDiagnosticBuilder &operator<<( 913 const SemaDiagnosticBuilder &Diag, const T &Value) { 914 const DiagnosticBuilder &BaseDiag = Diag; 915 BaseDiag << Value; 916 return Diag; 917 } 918 }; 919 920 /// \brief Emit a diagnostic. 921 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) { 922 DiagnosticBuilder DB = Diags.Report(Loc, DiagID); 923 return SemaDiagnosticBuilder(DB, *this, DiagID); 924 } 925 926 /// \brief Emit a partial diagnostic. 927 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 928 929 /// \brief Build a partial diagnostic. 930 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 931 932 bool findMacroSpelling(SourceLocation &loc, StringRef name); 933 934 /// \brief Get a string to suggest for zero-initialization of a type. 935 std::string getFixItZeroInitializerForType(QualType T) const; 936 std::string getFixItZeroLiteralForType(QualType T) const; 937 938 ExprResult Owned(Expr* E) { return E; } 939 ExprResult Owned(ExprResult R) { return R; } 940 StmtResult Owned(Stmt* S) { return S; } 941 942 void ActOnEndOfTranslationUnit(); 943 944 void CheckDelegatingCtorCycles(); 945 946 Scope *getScopeForContext(DeclContext *Ctx); 947 948 void PushFunctionScope(); 949 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 950 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 951 void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD, 952 RecordDecl *RD, 953 CapturedRegionKind K); 954 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 955 const Decl *D = 0, const BlockExpr *blkExpr = 0); 956 957 sema::FunctionScopeInfo *getCurFunction() const { 958 return FunctionScopes.back(); 959 } 960 961 template <typename ExprT> 962 void recordUseOfEvaluatedWeak(const ExprT *E, bool IsRead=true) { 963 if (!isUnevaluatedContext()) 964 getCurFunction()->recordUseOfWeak(E, IsRead); 965 } 966 967 void PushCompoundScope(); 968 void PopCompoundScope(); 969 970 sema::CompoundScopeInfo &getCurCompoundScope() const; 971 972 bool hasAnyUnrecoverableErrorsInThisFunction() const; 973 974 /// \brief Retrieve the current block, if any. 975 sema::BlockScopeInfo *getCurBlock(); 976 977 /// \brief Retrieve the current lambda expression, if any. 978 sema::LambdaScopeInfo *getCurLambda(); 979 980 /// \brief Retrieve the current captured region, if any. 981 sema::CapturedRegionScopeInfo *getCurCapturedRegion(); 982 983 /// WeakTopLevelDeclDecls - access to \#pragma weak-generated Decls 984 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 985 986 void ActOnComment(SourceRange Comment); 987 988 //===--------------------------------------------------------------------===// 989 // Type Analysis / Processing: SemaType.cpp. 990 // 991 992 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs, 993 const DeclSpec *DS = 0); 994 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVRA, 995 const DeclSpec *DS = 0); 996 QualType BuildPointerType(QualType T, 997 SourceLocation Loc, DeclarationName Entity); 998 QualType BuildReferenceType(QualType T, bool LValueRef, 999 SourceLocation Loc, DeclarationName Entity); 1000 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 1001 Expr *ArraySize, unsigned Quals, 1002 SourceRange Brackets, DeclarationName Entity); 1003 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 1004 SourceLocation AttrLoc); 1005 1006 bool CheckFunctionReturnType(QualType T, SourceLocation Loc); 1007 1008 /// \brief Build a function type. 1009 /// 1010 /// This routine checks the function type according to C++ rules and 1011 /// under the assumption that the result type and parameter types have 1012 /// just been instantiated from a template. It therefore duplicates 1013 /// some of the behavior of GetTypeForDeclarator, but in a much 1014 /// simpler form that is only suitable for this narrow use case. 1015 /// 1016 /// \param T The return type of the function. 1017 /// 1018 /// \param ParamTypes The parameter types of the function. This array 1019 /// will be modified to account for adjustments to the types of the 1020 /// function parameters. 1021 /// 1022 /// \param Loc The location of the entity whose type involves this 1023 /// function type or, if there is no such entity, the location of the 1024 /// type that will have function type. 1025 /// 1026 /// \param Entity The name of the entity that involves the function 1027 /// type, if known. 1028 /// 1029 /// \param EPI Extra information about the function type. Usually this will 1030 /// be taken from an existing function with the same prototype. 1031 /// 1032 /// \returns A suitable function type, if there are no errors. The 1033 /// unqualified type will always be a FunctionProtoType. 1034 /// Otherwise, returns a NULL type. 1035 QualType BuildFunctionType(QualType T, 1036 llvm::MutableArrayRef<QualType> ParamTypes, 1037 SourceLocation Loc, DeclarationName Entity, 1038 const FunctionProtoType::ExtProtoInfo &EPI); 1039 1040 QualType BuildMemberPointerType(QualType T, QualType Class, 1041 SourceLocation Loc, 1042 DeclarationName Entity); 1043 QualType BuildBlockPointerType(QualType T, 1044 SourceLocation Loc, DeclarationName Entity); 1045 QualType BuildParenType(QualType T); 1046 QualType BuildAtomicType(QualType T, SourceLocation Loc); 1047 1048 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 1049 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 1050 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 1051 TypeSourceInfo *ReturnTypeInfo); 1052 1053 /// \brief Package the given type and TSI into a ParsedType. 1054 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 1055 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 1056 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 1057 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 1058 CanThrowResult canThrow(const Expr *E); 1059 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc, 1060 const FunctionProtoType *FPT); 1061 bool CheckSpecifiedExceptionType(QualType &T, const SourceRange &Range); 1062 bool CheckDistantExceptionSpec(QualType T); 1063 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 1064 bool CheckEquivalentExceptionSpec( 1065 const FunctionProtoType *Old, SourceLocation OldLoc, 1066 const FunctionProtoType *New, SourceLocation NewLoc); 1067 bool CheckEquivalentExceptionSpec( 1068 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 1069 const FunctionProtoType *Old, SourceLocation OldLoc, 1070 const FunctionProtoType *New, SourceLocation NewLoc, 1071 bool *MissingExceptionSpecification = 0, 1072 bool *MissingEmptyExceptionSpecification = 0, 1073 bool AllowNoexceptAllMatchWithNoSpec = false, 1074 bool IsOperatorNew = false); 1075 bool CheckExceptionSpecSubset( 1076 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 1077 const FunctionProtoType *Superset, SourceLocation SuperLoc, 1078 const FunctionProtoType *Subset, SourceLocation SubLoc); 1079 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 1080 const FunctionProtoType *Target, SourceLocation TargetLoc, 1081 const FunctionProtoType *Source, SourceLocation SourceLoc); 1082 1083 TypeResult ActOnTypeName(Scope *S, Declarator &D); 1084 1085 /// \brief The parser has parsed the context-sensitive type 'instancetype' 1086 /// in an Objective-C message declaration. Return the appropriate type. 1087 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 1088 1089 /// \brief Abstract class used to diagnose incomplete types. 1090 struct TypeDiagnoser { 1091 bool Suppressed; 1092 1093 TypeDiagnoser(bool Suppressed = false) : Suppressed(Suppressed) { } 1094 1095 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0; 1096 virtual ~TypeDiagnoser() {} 1097 }; 1098 1099 static int getPrintable(int I) { return I; } 1100 static unsigned getPrintable(unsigned I) { return I; } 1101 static bool getPrintable(bool B) { return B; } 1102 static const char * getPrintable(const char *S) { return S; } 1103 static StringRef getPrintable(StringRef S) { return S; } 1104 static const std::string &getPrintable(const std::string &S) { return S; } 1105 static const IdentifierInfo *getPrintable(const IdentifierInfo *II) { 1106 return II; 1107 } 1108 static DeclarationName getPrintable(DeclarationName N) { return N; } 1109 static QualType getPrintable(QualType T) { return T; } 1110 static SourceRange getPrintable(SourceRange R) { return R; } 1111 static SourceRange getPrintable(SourceLocation L) { return L; } 1112 static SourceRange getPrintable(Expr *E) { return E->getSourceRange(); } 1113 static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();} 1114 1115 template<typename T1> 1116 class BoundTypeDiagnoser1 : public TypeDiagnoser { 1117 unsigned DiagID; 1118 const T1 &Arg1; 1119 1120 public: 1121 BoundTypeDiagnoser1(unsigned DiagID, const T1 &Arg1) 1122 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1) { } 1123 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 1124 if (Suppressed) return; 1125 S.Diag(Loc, DiagID) << getPrintable(Arg1) << T; 1126 } 1127 1128 virtual ~BoundTypeDiagnoser1() { } 1129 }; 1130 1131 template<typename T1, typename T2> 1132 class BoundTypeDiagnoser2 : public TypeDiagnoser { 1133 unsigned DiagID; 1134 const T1 &Arg1; 1135 const T2 &Arg2; 1136 1137 public: 1138 BoundTypeDiagnoser2(unsigned DiagID, const T1 &Arg1, 1139 const T2 &Arg2) 1140 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1), 1141 Arg2(Arg2) { } 1142 1143 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 1144 if (Suppressed) return; 1145 S.Diag(Loc, DiagID) << getPrintable(Arg1) << getPrintable(Arg2) << T; 1146 } 1147 1148 virtual ~BoundTypeDiagnoser2() { } 1149 }; 1150 1151 template<typename T1, typename T2, typename T3> 1152 class BoundTypeDiagnoser3 : public TypeDiagnoser { 1153 unsigned DiagID; 1154 const T1 &Arg1; 1155 const T2 &Arg2; 1156 const T3 &Arg3; 1157 1158 public: 1159 BoundTypeDiagnoser3(unsigned DiagID, const T1 &Arg1, 1160 const T2 &Arg2, const T3 &Arg3) 1161 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1), 1162 Arg2(Arg2), Arg3(Arg3) { } 1163 1164 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 1165 if (Suppressed) return; 1166 S.Diag(Loc, DiagID) 1167 << getPrintable(Arg1) << getPrintable(Arg2) << getPrintable(Arg3) << T; 1168 } 1169 1170 virtual ~BoundTypeDiagnoser3() { } 1171 }; 1172 1173 bool RequireCompleteType(SourceLocation Loc, QualType T, 1174 TypeDiagnoser &Diagnoser); 1175 bool RequireCompleteType(SourceLocation Loc, QualType T, 1176 unsigned DiagID); 1177 1178 template<typename T1> 1179 bool RequireCompleteType(SourceLocation Loc, QualType T, 1180 unsigned DiagID, const T1 &Arg1) { 1181 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1182 return RequireCompleteType(Loc, T, Diagnoser); 1183 } 1184 1185 template<typename T1, typename T2> 1186 bool RequireCompleteType(SourceLocation Loc, QualType T, 1187 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) { 1188 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1189 return RequireCompleteType(Loc, T, Diagnoser); 1190 } 1191 1192 template<typename T1, typename T2, typename T3> 1193 bool RequireCompleteType(SourceLocation Loc, QualType T, 1194 unsigned DiagID, const T1 &Arg1, const T2 &Arg2, 1195 const T3 &Arg3) { 1196 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1197 Arg3); 1198 return RequireCompleteType(Loc, T, Diagnoser); 1199 } 1200 1201 bool RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser); 1202 bool RequireCompleteExprType(Expr *E, unsigned DiagID); 1203 1204 template<typename T1> 1205 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1) { 1206 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1207 return RequireCompleteExprType(E, Diagnoser); 1208 } 1209 1210 template<typename T1, typename T2> 1211 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1, 1212 const T2 &Arg2) { 1213 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1214 return RequireCompleteExprType(E, Diagnoser); 1215 } 1216 1217 template<typename T1, typename T2, typename T3> 1218 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1, 1219 const T2 &Arg2, const T3 &Arg3) { 1220 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1221 Arg3); 1222 return RequireCompleteExprType(E, Diagnoser); 1223 } 1224 1225 bool RequireLiteralType(SourceLocation Loc, QualType T, 1226 TypeDiagnoser &Diagnoser); 1227 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID); 1228 1229 template<typename T1> 1230 bool RequireLiteralType(SourceLocation Loc, QualType T, 1231 unsigned DiagID, const T1 &Arg1) { 1232 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1233 return RequireLiteralType(Loc, T, Diagnoser); 1234 } 1235 1236 template<typename T1, typename T2> 1237 bool RequireLiteralType(SourceLocation Loc, QualType T, 1238 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) { 1239 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1240 return RequireLiteralType(Loc, T, Diagnoser); 1241 } 1242 1243 template<typename T1, typename T2, typename T3> 1244 bool RequireLiteralType(SourceLocation Loc, QualType T, 1245 unsigned DiagID, const T1 &Arg1, const T2 &Arg2, 1246 const T3 &Arg3) { 1247 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1248 Arg3); 1249 return RequireLiteralType(Loc, T, Diagnoser); 1250 } 1251 1252 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1253 const CXXScopeSpec &SS, QualType T); 1254 1255 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 1256 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 1257 QualType BuildUnaryTransformType(QualType BaseType, 1258 UnaryTransformType::UTTKind UKind, 1259 SourceLocation Loc); 1260 1261 //===--------------------------------------------------------------------===// 1262 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 1263 // 1264 1265 /// List of decls defined in a function prototype. This contains EnumConstants 1266 /// that incorrectly end up in translation unit scope because there is no 1267 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 1268 /// them into the FunctionDecl. 1269 std::vector<NamedDecl*> DeclsInPrototypeScope; 1270 /// Nonzero if we are currently parsing a function declarator. This is a counter 1271 /// as opposed to a boolean so we can deal with nested function declarators 1272 /// such as: 1273 /// void f(void (*g)(), ...) 1274 unsigned InFunctionDeclarator; 1275 1276 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 1277 1278 void DiagnoseUseOfUnimplementedSelectors(); 1279 1280 bool isSimpleTypeSpecifier(tok::TokenKind Kind) const; 1281 1282 ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, 1283 Scope *S, CXXScopeSpec *SS = 0, 1284 bool isClassName = false, 1285 bool HasTrailingDot = false, 1286 ParsedType ObjectType = ParsedType(), 1287 bool IsCtorOrDtorName = false, 1288 bool WantNontrivialTypeSourceInfo = false, 1289 IdentifierInfo **CorrectedII = 0); 1290 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 1291 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 1292 bool DiagnoseUnknownTypeName(IdentifierInfo *&II, 1293 SourceLocation IILoc, 1294 Scope *S, 1295 CXXScopeSpec *SS, 1296 ParsedType &SuggestedType); 1297 1298 /// \brief Describes the result of the name lookup and resolution performed 1299 /// by \c ClassifyName(). 1300 enum NameClassificationKind { 1301 NC_Unknown, 1302 NC_Error, 1303 NC_Keyword, 1304 NC_Type, 1305 NC_Expression, 1306 NC_NestedNameSpecifier, 1307 NC_TypeTemplate, 1308 NC_FunctionTemplate 1309 }; 1310 1311 class NameClassification { 1312 NameClassificationKind Kind; 1313 ExprResult Expr; 1314 TemplateName Template; 1315 ParsedType Type; 1316 const IdentifierInfo *Keyword; 1317 1318 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 1319 1320 public: 1321 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 1322 1323 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 1324 1325 NameClassification(const IdentifierInfo *Keyword) 1326 : Kind(NC_Keyword), Keyword(Keyword) { } 1327 1328 static NameClassification Error() { 1329 return NameClassification(NC_Error); 1330 } 1331 1332 static NameClassification Unknown() { 1333 return NameClassification(NC_Unknown); 1334 } 1335 1336 static NameClassification NestedNameSpecifier() { 1337 return NameClassification(NC_NestedNameSpecifier); 1338 } 1339 1340 static NameClassification TypeTemplate(TemplateName Name) { 1341 NameClassification Result(NC_TypeTemplate); 1342 Result.Template = Name; 1343 return Result; 1344 } 1345 1346 static NameClassification FunctionTemplate(TemplateName Name) { 1347 NameClassification Result(NC_FunctionTemplate); 1348 Result.Template = Name; 1349 return Result; 1350 } 1351 1352 NameClassificationKind getKind() const { return Kind; } 1353 1354 ParsedType getType() const { 1355 assert(Kind == NC_Type); 1356 return Type; 1357 } 1358 1359 ExprResult getExpression() const { 1360 assert(Kind == NC_Expression); 1361 return Expr; 1362 } 1363 1364 TemplateName getTemplateName() const { 1365 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1366 return Template; 1367 } 1368 1369 TemplateNameKind getTemplateNameKind() const { 1370 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1371 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1372 } 1373 }; 1374 1375 /// \brief Perform name lookup on the given name, classifying it based on 1376 /// the results of name lookup and the following token. 1377 /// 1378 /// This routine is used by the parser to resolve identifiers and help direct 1379 /// parsing. When the identifier cannot be found, this routine will attempt 1380 /// to correct the typo and classify based on the resulting name. 1381 /// 1382 /// \param S The scope in which we're performing name lookup. 1383 /// 1384 /// \param SS The nested-name-specifier that precedes the name. 1385 /// 1386 /// \param Name The identifier. If typo correction finds an alternative name, 1387 /// this pointer parameter will be updated accordingly. 1388 /// 1389 /// \param NameLoc The location of the identifier. 1390 /// 1391 /// \param NextToken The token following the identifier. Used to help 1392 /// disambiguate the name. 1393 /// 1394 /// \param IsAddressOfOperand True if this name is the operand of a unary 1395 /// address of ('&') expression, assuming it is classified as an 1396 /// expression. 1397 /// 1398 /// \param CCC The correction callback, if typo correction is desired. 1399 NameClassification ClassifyName(Scope *S, 1400 CXXScopeSpec &SS, 1401 IdentifierInfo *&Name, 1402 SourceLocation NameLoc, 1403 const Token &NextToken, 1404 bool IsAddressOfOperand, 1405 CorrectionCandidateCallback *CCC = 0); 1406 1407 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1408 1409 NamedDecl *HandleDeclarator(Scope *S, Declarator &D, 1410 MultiTemplateParamsArg TemplateParameterLists); 1411 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1412 const LookupResult &Previous, 1413 Scope *S); 1414 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1415 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, 1416 DeclarationName Name, 1417 SourceLocation Loc); 1418 void DiagnoseFunctionSpecifiers(const DeclSpec &DS); 1419 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1420 void CheckShadow(Scope *S, VarDecl *D); 1421 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1422 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1423 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1424 TypeSourceInfo *TInfo, 1425 LookupResult &Previous); 1426 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1427 LookupResult &Previous, bool &Redeclaration); 1428 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1429 TypeSourceInfo *TInfo, 1430 LookupResult &Previous, 1431 MultiTemplateParamsArg TemplateParamLists); 1432 // Returns true if the variable declaration is a redeclaration 1433 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1434 void CheckVariableDeclarationType(VarDecl *NewVD); 1435 void CheckCompleteVariableDeclaration(VarDecl *var); 1436 void MaybeSuggestAddingStaticToDecl(const FunctionDecl *D); 1437 void ActOnStartFunctionDeclarator(); 1438 void ActOnEndFunctionDeclarator(); 1439 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1440 TypeSourceInfo *TInfo, 1441 LookupResult &Previous, 1442 MultiTemplateParamsArg TemplateParamLists, 1443 bool &AddToScope); 1444 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1445 void checkVoidParamDecl(ParmVarDecl *Param); 1446 1447 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1448 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1449 1450 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1451 // Returns true if the function declaration is a redeclaration 1452 bool CheckFunctionDeclaration(Scope *S, 1453 FunctionDecl *NewFD, LookupResult &Previous, 1454 bool IsExplicitSpecialization); 1455 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1456 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1457 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1458 SourceLocation Loc, 1459 QualType T); 1460 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1461 SourceLocation NameLoc, IdentifierInfo *Name, 1462 QualType T, TypeSourceInfo *TSInfo, 1463 StorageClass SC); 1464 void ActOnParamDefaultArgument(Decl *param, 1465 SourceLocation EqualLoc, 1466 Expr *defarg); 1467 void ActOnParamUnparsedDefaultArgument(Decl *param, 1468 SourceLocation EqualLoc, 1469 SourceLocation ArgLoc); 1470 void ActOnParamDefaultArgumentError(Decl *param); 1471 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1472 SourceLocation EqualLoc); 1473 1474 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1475 bool TypeMayContainAuto); 1476 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1477 void ActOnInitializerError(Decl *Dcl); 1478 void ActOnCXXForRangeDecl(Decl *D); 1479 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1480 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1481 void FinalizeDeclaration(Decl *D); 1482 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1483 Decl **Group, 1484 unsigned NumDecls); 1485 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1486 bool TypeMayContainAuto = true); 1487 1488 /// Should be called on all declarations that might have attached 1489 /// documentation comments. 1490 void ActOnDocumentableDecl(Decl *D); 1491 void ActOnDocumentableDecls(Decl **Group, unsigned NumDecls); 1492 1493 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1494 SourceLocation LocAfterDecls); 1495 void CheckForFunctionRedefinition(FunctionDecl *FD); 1496 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1497 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1498 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1499 bool isObjCMethodDecl(Decl *D) { 1500 return D && isa<ObjCMethodDecl>(D); 1501 } 1502 1503 /// \brief Determine whether we can skip parsing the body of a function 1504 /// definition, assuming we don't care about analyzing its body or emitting 1505 /// code for that function. 1506 /// 1507 /// This will be \c false only if we may need the body of the function in 1508 /// order to parse the rest of the program (for instance, if it is 1509 /// \c constexpr in C++11 or has an 'auto' return type in C++14). 1510 bool canSkipFunctionBody(Decl *D); 1511 1512 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1513 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1514 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1515 Decl *ActOnSkippedFunctionBody(Decl *Decl); 1516 1517 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1518 /// attribute for which parsing is delayed. 1519 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1520 1521 /// \brief Diagnose any unused parameters in the given sequence of 1522 /// ParmVarDecl pointers. 1523 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1524 ParmVarDecl * const *End); 1525 1526 /// \brief Diagnose whether the size of parameters or return value of a 1527 /// function or obj-c method definition is pass-by-value and larger than a 1528 /// specified threshold. 1529 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1530 ParmVarDecl * const *End, 1531 QualType ReturnTy, 1532 NamedDecl *D); 1533 1534 void DiagnoseInvalidJumps(Stmt *Body); 1535 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1536 SourceLocation AsmLoc, 1537 SourceLocation RParenLoc); 1538 1539 /// \brief Handle a C++11 empty-declaration and attribute-declaration. 1540 Decl *ActOnEmptyDeclaration(Scope *S, 1541 AttributeList *AttrList, 1542 SourceLocation SemiLoc); 1543 1544 /// \brief The parser has processed a module import declaration. 1545 /// 1546 /// \param AtLoc The location of the '@' symbol, if any. 1547 /// 1548 /// \param ImportLoc The location of the 'import' keyword. 1549 /// 1550 /// \param Path The module access path. 1551 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1552 ModuleIdPath Path); 1553 1554 /// \brief Create an implicit import of the given module at the given 1555 /// source location. 1556 /// 1557 /// This routine is typically used for error recovery, when the entity found 1558 /// by name lookup is actually hidden within a module that we know about but 1559 /// the user has forgotten to import. 1560 void createImplicitModuleImport(SourceLocation Loc, Module *Mod); 1561 1562 /// \brief Retrieve a suitable printing policy. 1563 PrintingPolicy getPrintingPolicy() const { 1564 return getPrintingPolicy(Context, PP); 1565 } 1566 1567 /// \brief Retrieve a suitable printing policy. 1568 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1569 const Preprocessor &PP); 1570 1571 /// Scope actions. 1572 void ActOnPopScope(SourceLocation Loc, Scope *S); 1573 void ActOnTranslationUnitScope(Scope *S); 1574 1575 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1576 DeclSpec &DS); 1577 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1578 DeclSpec &DS, 1579 MultiTemplateParamsArg TemplateParams, 1580 bool IsExplicitInstantiation = false); 1581 1582 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1583 AccessSpecifier AS, 1584 RecordDecl *Record); 1585 1586 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1587 RecordDecl *Record); 1588 1589 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1590 TagTypeKind NewTag, bool isDefinition, 1591 SourceLocation NewTagLoc, 1592 const IdentifierInfo &Name); 1593 1594 enum TagUseKind { 1595 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1596 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1597 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1598 TUK_Friend // Friend declaration: 'friend struct foo;' 1599 }; 1600 1601 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1602 SourceLocation KWLoc, CXXScopeSpec &SS, 1603 IdentifierInfo *Name, SourceLocation NameLoc, 1604 AttributeList *Attr, AccessSpecifier AS, 1605 SourceLocation ModulePrivateLoc, 1606 MultiTemplateParamsArg TemplateParameterLists, 1607 bool &OwnedDecl, bool &IsDependent, 1608 SourceLocation ScopedEnumKWLoc, 1609 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1610 1611 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1612 unsigned TagSpec, SourceLocation TagLoc, 1613 CXXScopeSpec &SS, 1614 IdentifierInfo *Name, SourceLocation NameLoc, 1615 AttributeList *Attr, 1616 MultiTemplateParamsArg TempParamLists); 1617 1618 TypeResult ActOnDependentTag(Scope *S, 1619 unsigned TagSpec, 1620 TagUseKind TUK, 1621 const CXXScopeSpec &SS, 1622 IdentifierInfo *Name, 1623 SourceLocation TagLoc, 1624 SourceLocation NameLoc); 1625 1626 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1627 IdentifierInfo *ClassName, 1628 SmallVectorImpl<Decl *> &Decls); 1629 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1630 Declarator &D, Expr *BitfieldWidth); 1631 1632 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1633 Declarator &D, Expr *BitfieldWidth, 1634 InClassInitStyle InitStyle, 1635 AccessSpecifier AS); 1636 MSPropertyDecl *HandleMSProperty(Scope *S, RecordDecl *TagD, 1637 SourceLocation DeclStart, 1638 Declarator &D, Expr *BitfieldWidth, 1639 InClassInitStyle InitStyle, 1640 AccessSpecifier AS, 1641 AttributeList *MSPropertyAttr); 1642 1643 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1644 TypeSourceInfo *TInfo, 1645 RecordDecl *Record, SourceLocation Loc, 1646 bool Mutable, Expr *BitfieldWidth, 1647 InClassInitStyle InitStyle, 1648 SourceLocation TSSL, 1649 AccessSpecifier AS, NamedDecl *PrevDecl, 1650 Declarator *D = 0); 1651 1652 bool CheckNontrivialField(FieldDecl *FD); 1653 void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM); 1654 bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, 1655 bool Diagnose = false); 1656 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1657 void ActOnLastBitfield(SourceLocation DeclStart, 1658 SmallVectorImpl<Decl *> &AllIvarDecls); 1659 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1660 Declarator &D, Expr *BitfieldWidth, 1661 tok::ObjCKeywordKind visibility); 1662 1663 // This is used for both record definitions and ObjC interface declarations. 1664 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1665 ArrayRef<Decl *> Fields, 1666 SourceLocation LBrac, SourceLocation RBrac, 1667 AttributeList *AttrList); 1668 1669 /// ActOnTagStartDefinition - Invoked when we have entered the 1670 /// scope of a tag's definition (e.g., for an enumeration, class, 1671 /// struct, or union). 1672 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1673 1674 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1675 1676 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1677 /// C++ record definition's base-specifiers clause and are starting its 1678 /// member declarations. 1679 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1680 SourceLocation FinalLoc, 1681 SourceLocation LBraceLoc); 1682 1683 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1684 /// the definition of a tag (enumeration, class, struct, or union). 1685 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1686 SourceLocation RBraceLoc); 1687 1688 void ActOnObjCContainerFinishDefinition(); 1689 1690 /// \brief Invoked when we must temporarily exit the objective-c container 1691 /// scope for parsing/looking-up C constructs. 1692 /// 1693 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1694 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1695 void ActOnObjCReenterContainerContext(DeclContext *DC); 1696 1697 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1698 /// error parsing the definition of a tag. 1699 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1700 1701 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1702 EnumConstantDecl *LastEnumConst, 1703 SourceLocation IdLoc, 1704 IdentifierInfo *Id, 1705 Expr *val); 1706 bool CheckEnumUnderlyingType(TypeSourceInfo *TI); 1707 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, 1708 QualType EnumUnderlyingTy, const EnumDecl *Prev); 1709 1710 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1711 SourceLocation IdLoc, IdentifierInfo *Id, 1712 AttributeList *Attrs, 1713 SourceLocation EqualLoc, Expr *Val); 1714 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1715 SourceLocation RBraceLoc, Decl *EnumDecl, 1716 ArrayRef<Decl *> Elements, 1717 Scope *S, AttributeList *Attr); 1718 1719 DeclContext *getContainingDC(DeclContext *DC); 1720 1721 /// Set the current declaration context until it gets popped. 1722 void PushDeclContext(Scope *S, DeclContext *DC); 1723 void PopDeclContext(); 1724 1725 /// EnterDeclaratorContext - Used when we must lookup names in the context 1726 /// of a declarator's nested name specifier. 1727 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1728 void ExitDeclaratorContext(Scope *S); 1729 1730 /// Push the parameters of D, which must be a function, into scope. 1731 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1732 void ActOnExitFunctionContext(); 1733 1734 DeclContext *getFunctionLevelDeclContext(); 1735 1736 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1737 /// to the function decl for the function being parsed. If we're currently 1738 /// in a 'block', this returns the containing context. 1739 FunctionDecl *getCurFunctionDecl(); 1740 1741 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1742 /// the method decl for the method being parsed. If we're currently 1743 /// in a 'block', this returns the containing context. 1744 ObjCMethodDecl *getCurMethodDecl(); 1745 1746 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1747 /// or C function we're in, otherwise return null. If we're currently 1748 /// in a 'block', this returns the containing context. 1749 NamedDecl *getCurFunctionOrMethodDecl(); 1750 1751 /// Add this decl to the scope shadowed decl chains. 1752 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1753 1754 /// \brief Make the given externally-produced declaration visible at the 1755 /// top level scope. 1756 /// 1757 /// \param D The externally-produced declaration to push. 1758 /// 1759 /// \param Name The name of the externally-produced declaration. 1760 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1761 1762 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1763 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1764 /// true if 'D' belongs to the given declaration context. 1765 /// 1766 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1767 /// whether the declaration is in scope for the purposes of explicit template 1768 /// instantiation or specialization. The default is false. 1769 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1770 bool ExplicitInstantiationOrSpecialization = false); 1771 1772 /// Finds the scope corresponding to the given decl context, if it 1773 /// happens to be an enclosing scope. Otherwise return NULL. 1774 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1775 1776 /// Subroutines of ActOnDeclarator(). 1777 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1778 TypeSourceInfo *TInfo); 1779 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1780 1781 /// Attribute merging methods. Return true if a new attribute was added. 1782 AvailabilityAttr *mergeAvailabilityAttr(NamedDecl *D, SourceRange Range, 1783 IdentifierInfo *Platform, 1784 VersionTuple Introduced, 1785 VersionTuple Deprecated, 1786 VersionTuple Obsoleted, 1787 bool IsUnavailable, 1788 StringRef Message, 1789 bool Override, 1790 unsigned AttrSpellingListIndex); 1791 TypeVisibilityAttr *mergeTypeVisibilityAttr(Decl *D, SourceRange Range, 1792 TypeVisibilityAttr::VisibilityType Vis, 1793 unsigned AttrSpellingListIndex); 1794 VisibilityAttr *mergeVisibilityAttr(Decl *D, SourceRange Range, 1795 VisibilityAttr::VisibilityType Vis, 1796 unsigned AttrSpellingListIndex); 1797 DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range, 1798 unsigned AttrSpellingListIndex); 1799 DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range, 1800 unsigned AttrSpellingListIndex); 1801 FormatAttr *mergeFormatAttr(Decl *D, SourceRange Range, StringRef Format, 1802 int FormatIdx, int FirstArg, 1803 unsigned AttrSpellingListIndex); 1804 SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name, 1805 unsigned AttrSpellingListIndex); 1806 1807 /// \brief Describes the kind of merge to perform for availability 1808 /// attributes (including "deprecated", "unavailable", and "availability"). 1809 enum AvailabilityMergeKind { 1810 /// \brief Don't merge availability attributes at all. 1811 AMK_None, 1812 /// \brief Merge availability attributes for a redeclaration, which requires 1813 /// an exact match. 1814 AMK_Redeclaration, 1815 /// \brief Merge availability attributes for an override, which requires 1816 /// an exact match or a weakening of constraints. 1817 AMK_Override 1818 }; 1819 1820 void mergeDeclAttributes(NamedDecl *New, Decl *Old, 1821 AvailabilityMergeKind AMK = AMK_Redeclaration); 1822 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1823 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S); 1824 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, 1825 Scope *S); 1826 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1827 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls, 1828 bool OldDeclsWereHidden); 1829 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old, bool OldIsHidden); 1830 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1831 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); 1832 1833 // AssignmentAction - This is used by all the assignment diagnostic functions 1834 // to represent what is actually causing the operation 1835 enum AssignmentAction { 1836 AA_Assigning, 1837 AA_Passing, 1838 AA_Returning, 1839 AA_Converting, 1840 AA_Initializing, 1841 AA_Sending, 1842 AA_Casting 1843 }; 1844 1845 /// C++ Overloading. 1846 enum OverloadKind { 1847 /// This is a legitimate overload: the existing declarations are 1848 /// functions or function templates with different signatures. 1849 Ovl_Overload, 1850 1851 /// This is not an overload because the signature exactly matches 1852 /// an existing declaration. 1853 Ovl_Match, 1854 1855 /// This is not an overload because the lookup results contain a 1856 /// non-function. 1857 Ovl_NonFunction 1858 }; 1859 OverloadKind CheckOverload(Scope *S, 1860 FunctionDecl *New, 1861 const LookupResult &OldDecls, 1862 NamedDecl *&OldDecl, 1863 bool IsForUsingDecl); 1864 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1865 1866 /// \brief Checks availability of the function depending on the current 1867 /// function context.Inside an unavailable function,unavailability is ignored. 1868 /// 1869 /// \returns true if \p FD is unavailable and current context is inside 1870 /// an available function, false otherwise. 1871 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1872 1873 ImplicitConversionSequence 1874 TryImplicitConversion(Expr *From, QualType ToType, 1875 bool SuppressUserConversions, 1876 bool AllowExplicit, 1877 bool InOverloadResolution, 1878 bool CStyle, 1879 bool AllowObjCWritebackConversion); 1880 1881 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1882 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1883 bool IsComplexPromotion(QualType FromType, QualType ToType); 1884 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1885 bool InOverloadResolution, 1886 QualType& ConvertedType, bool &IncompatibleObjC); 1887 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1888 QualType& ConvertedType, bool &IncompatibleObjC); 1889 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1890 QualType &ConvertedType); 1891 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1892 QualType& ConvertedType); 1893 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1894 const FunctionProtoType *NewType, 1895 unsigned *ArgPos = 0); 1896 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1897 QualType FromType, QualType ToType); 1898 1899 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1900 bool CheckPointerConversion(Expr *From, QualType ToType, 1901 CastKind &Kind, 1902 CXXCastPath& BasePath, 1903 bool IgnoreBaseAccess); 1904 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1905 bool InOverloadResolution, 1906 QualType &ConvertedType); 1907 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1908 CastKind &Kind, 1909 CXXCastPath &BasePath, 1910 bool IgnoreBaseAccess); 1911 bool IsQualificationConversion(QualType FromType, QualType ToType, 1912 bool CStyle, bool &ObjCLifetimeConversion); 1913 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1914 QualType &ResultTy); 1915 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1916 bool isSameOrCompatibleFunctionType(CanQualType Param, CanQualType Arg); 1917 1918 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1919 const VarDecl *NRVOCandidate, 1920 QualType ResultType, 1921 Expr *Value, 1922 bool AllowNRVO = true); 1923 1924 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1925 ExprResult Init); 1926 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1927 SourceLocation EqualLoc, 1928 ExprResult Init, 1929 bool TopLevelOfInitList = false, 1930 bool AllowExplicit = false); 1931 ExprResult PerformObjectArgumentInitialization(Expr *From, 1932 NestedNameSpecifier *Qualifier, 1933 NamedDecl *FoundDecl, 1934 CXXMethodDecl *Method); 1935 1936 ExprResult PerformContextuallyConvertToBool(Expr *From); 1937 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1938 1939 /// Contexts in which a converted constant expression is required. 1940 enum CCEKind { 1941 CCEK_CaseValue, ///< Expression in a case label. 1942 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1943 CCEK_TemplateArg ///< Value of a non-type template parameter. 1944 }; 1945 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1946 llvm::APSInt &Value, CCEKind CCE); 1947 1948 /// \brief Abstract base class used to perform a contextual implicit 1949 /// conversion from an expression to any type passing a filter. 1950 class ContextualImplicitConverter { 1951 public: 1952 bool Suppress; 1953 bool SuppressConversion; 1954 1955 ContextualImplicitConverter(bool Suppress = false, 1956 bool SuppressConversion = false) 1957 : Suppress(Suppress), SuppressConversion(SuppressConversion) {} 1958 1959 /// \brief Determine whether the specified type is a valid destination type 1960 /// for this conversion. 1961 virtual bool match(QualType T) = 0; 1962 1963 /// \brief Emits a diagnostic complaining that the expression does not have 1964 /// integral or enumeration type. 1965 virtual SemaDiagnosticBuilder 1966 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) = 0; 1967 1968 /// \brief Emits a diagnostic when the expression has incomplete class type. 1969 virtual SemaDiagnosticBuilder 1970 diagnoseIncomplete(Sema &S, SourceLocation Loc, QualType T) = 0; 1971 1972 /// \brief Emits a diagnostic when the only matching conversion function 1973 /// is explicit. 1974 virtual SemaDiagnosticBuilder diagnoseExplicitConv( 1975 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0; 1976 1977 /// \brief Emits a note for the explicit conversion function. 1978 virtual SemaDiagnosticBuilder 1979 noteExplicitConv(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0; 1980 1981 /// \brief Emits a diagnostic when there are multiple possible conversion 1982 /// functions. 1983 virtual SemaDiagnosticBuilder 1984 diagnoseAmbiguous(Sema &S, SourceLocation Loc, QualType T) = 0; 1985 1986 /// \brief Emits a note for one of the candidate conversions. 1987 virtual SemaDiagnosticBuilder 1988 noteAmbiguous(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0; 1989 1990 /// \brief Emits a diagnostic when we picked a conversion function 1991 /// (for cases when we are not allowed to pick a conversion function). 1992 virtual SemaDiagnosticBuilder diagnoseConversion( 1993 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0; 1994 1995 virtual ~ContextualImplicitConverter() {} 1996 }; 1997 1998 class ICEConvertDiagnoser : public ContextualImplicitConverter { 1999 bool AllowScopedEnumerations; 2000 2001 public: 2002 ICEConvertDiagnoser(bool AllowScopedEnumerations, 2003 bool Suppress, bool SuppressConversion) 2004 : ContextualImplicitConverter(Suppress, SuppressConversion), 2005 AllowScopedEnumerations(AllowScopedEnumerations) {} 2006 2007 /// Match an integral or (possibly scoped) enumeration type. 2008 bool match(QualType T); 2009 2010 SemaDiagnosticBuilder 2011 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) { 2012 return diagnoseNotInt(S, Loc, T); 2013 } 2014 2015 /// \brief Emits a diagnostic complaining that the expression does not have 2016 /// integral or enumeration type. 2017 virtual SemaDiagnosticBuilder 2018 diagnoseNotInt(Sema &S, SourceLocation Loc, QualType T) = 0; 2019 }; 2020 2021 /// Perform a contextual implicit conversion. 2022 ExprResult PerformContextualImplicitConversion( 2023 SourceLocation Loc, Expr *FromE, ContextualImplicitConverter &Converter); 2024 2025 2026 enum ObjCSubscriptKind { 2027 OS_Array, 2028 OS_Dictionary, 2029 OS_Error 2030 }; 2031 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 2032 2033 // Note that LK_String is intentionally after the other literals, as 2034 // this is used for diagnostics logic. 2035 enum ObjCLiteralKind { 2036 LK_Array, 2037 LK_Dictionary, 2038 LK_Numeric, 2039 LK_Boxed, 2040 LK_String, 2041 LK_Block, 2042 LK_None 2043 }; 2044 ObjCLiteralKind CheckLiteralKind(Expr *FromE); 2045 2046 ExprResult PerformObjectMemberConversion(Expr *From, 2047 NestedNameSpecifier *Qualifier, 2048 NamedDecl *FoundDecl, 2049 NamedDecl *Member); 2050 2051 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 2052 // TODO: make this is a typesafe union. 2053 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 2054 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 2055 2056 void AddOverloadCandidate(FunctionDecl *Function, 2057 DeclAccessPair FoundDecl, 2058 ArrayRef<Expr *> Args, 2059 OverloadCandidateSet& CandidateSet, 2060 bool SuppressUserConversions = false, 2061 bool PartialOverloading = false, 2062 bool AllowExplicit = false); 2063 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 2064 ArrayRef<Expr *> Args, 2065 OverloadCandidateSet& CandidateSet, 2066 bool SuppressUserConversions = false, 2067 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 2068 void AddMethodCandidate(DeclAccessPair FoundDecl, 2069 QualType ObjectType, 2070 Expr::Classification ObjectClassification, 2071 ArrayRef<Expr *> Args, 2072 OverloadCandidateSet& CandidateSet, 2073 bool SuppressUserConversion = false); 2074 void AddMethodCandidate(CXXMethodDecl *Method, 2075 DeclAccessPair FoundDecl, 2076 CXXRecordDecl *ActingContext, QualType ObjectType, 2077 Expr::Classification ObjectClassification, 2078 ArrayRef<Expr *> Args, 2079 OverloadCandidateSet& CandidateSet, 2080 bool SuppressUserConversions = false); 2081 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 2082 DeclAccessPair FoundDecl, 2083 CXXRecordDecl *ActingContext, 2084 TemplateArgumentListInfo *ExplicitTemplateArgs, 2085 QualType ObjectType, 2086 Expr::Classification ObjectClassification, 2087 ArrayRef<Expr *> Args, 2088 OverloadCandidateSet& CandidateSet, 2089 bool SuppressUserConversions = false); 2090 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 2091 DeclAccessPair FoundDecl, 2092 TemplateArgumentListInfo *ExplicitTemplateArgs, 2093 ArrayRef<Expr *> Args, 2094 OverloadCandidateSet& CandidateSet, 2095 bool SuppressUserConversions = false); 2096 void AddConversionCandidate(CXXConversionDecl *Conversion, 2097 DeclAccessPair FoundDecl, 2098 CXXRecordDecl *ActingContext, 2099 Expr *From, QualType ToType, 2100 OverloadCandidateSet& CandidateSet); 2101 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 2102 DeclAccessPair FoundDecl, 2103 CXXRecordDecl *ActingContext, 2104 Expr *From, QualType ToType, 2105 OverloadCandidateSet &CandidateSet); 2106 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 2107 DeclAccessPair FoundDecl, 2108 CXXRecordDecl *ActingContext, 2109 const FunctionProtoType *Proto, 2110 Expr *Object, ArrayRef<Expr *> Args, 2111 OverloadCandidateSet& CandidateSet); 2112 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 2113 SourceLocation OpLoc, ArrayRef<Expr *> Args, 2114 OverloadCandidateSet& CandidateSet, 2115 SourceRange OpRange = SourceRange()); 2116 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 2117 ArrayRef<Expr *> Args, 2118 OverloadCandidateSet& CandidateSet, 2119 bool IsAssignmentOperator = false, 2120 unsigned NumContextualBoolArguments = 0); 2121 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 2122 SourceLocation OpLoc, ArrayRef<Expr *> Args, 2123 OverloadCandidateSet& CandidateSet); 2124 void AddArgumentDependentLookupCandidates(DeclarationName Name, 2125 bool Operator, SourceLocation Loc, 2126 ArrayRef<Expr *> Args, 2127 TemplateArgumentListInfo *ExplicitTemplateArgs, 2128 OverloadCandidateSet& CandidateSet, 2129 bool PartialOverloading = false); 2130 2131 // Emit as a 'note' the specific overload candidate 2132 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 2133 2134 // Emit as a series of 'note's all template and non-templates 2135 // identified by the expression Expr 2136 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 2137 2138 // [PossiblyAFunctionType] --> [Return] 2139 // NonFunctionType --> NonFunctionType 2140 // R (A) --> R(A) 2141 // R (*)(A) --> R (A) 2142 // R (&)(A) --> R (A) 2143 // R (S::*)(A) --> R (A) 2144 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 2145 2146 FunctionDecl * 2147 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 2148 QualType TargetType, 2149 bool Complain, 2150 DeclAccessPair &Found, 2151 bool *pHadMultipleCandidates = 0); 2152 2153 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 2154 bool Complain = false, 2155 DeclAccessPair* Found = 0); 2156 2157 bool ResolveAndFixSingleFunctionTemplateSpecialization( 2158 ExprResult &SrcExpr, 2159 bool DoFunctionPointerConverion = false, 2160 bool Complain = false, 2161 const SourceRange& OpRangeForComplaining = SourceRange(), 2162 QualType DestTypeForComplaining = QualType(), 2163 unsigned DiagIDForComplaining = 0); 2164 2165 2166 Expr *FixOverloadedFunctionReference(Expr *E, 2167 DeclAccessPair FoundDecl, 2168 FunctionDecl *Fn); 2169 ExprResult FixOverloadedFunctionReference(ExprResult, 2170 DeclAccessPair FoundDecl, 2171 FunctionDecl *Fn); 2172 2173 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 2174 ArrayRef<Expr *> Args, 2175 OverloadCandidateSet &CandidateSet, 2176 bool PartialOverloading = false); 2177 2178 // An enum used to represent the different possible results of building a 2179 // range-based for loop. 2180 enum ForRangeStatus { 2181 FRS_Success, 2182 FRS_NoViableFunction, 2183 FRS_DiagnosticIssued 2184 }; 2185 2186 // An enum to represent whether something is dealing with a call to begin() 2187 // or a call to end() in a range-based for loop. 2188 enum BeginEndFunction { 2189 BEF_begin, 2190 BEF_end 2191 }; 2192 2193 ForRangeStatus BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc, 2194 SourceLocation RangeLoc, 2195 VarDecl *Decl, 2196 BeginEndFunction BEF, 2197 const DeclarationNameInfo &NameInfo, 2198 LookupResult &MemberLookup, 2199 OverloadCandidateSet *CandidateSet, 2200 Expr *Range, ExprResult *CallExpr); 2201 2202 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 2203 UnresolvedLookupExpr *ULE, 2204 SourceLocation LParenLoc, 2205 MultiExprArg Args, 2206 SourceLocation RParenLoc, 2207 Expr *ExecConfig, 2208 bool AllowTypoCorrection=true); 2209 2210 bool buildOverloadedCallSet(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE, 2211 MultiExprArg Args, SourceLocation RParenLoc, 2212 OverloadCandidateSet *CandidateSet, 2213 ExprResult *Result); 2214 2215 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 2216 unsigned Opc, 2217 const UnresolvedSetImpl &Fns, 2218 Expr *input); 2219 2220 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 2221 unsigned Opc, 2222 const UnresolvedSetImpl &Fns, 2223 Expr *LHS, Expr *RHS); 2224 2225 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 2226 SourceLocation RLoc, 2227 Expr *Base,Expr *Idx); 2228 2229 ExprResult 2230 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 2231 SourceLocation LParenLoc, 2232 MultiExprArg Args, 2233 SourceLocation RParenLoc); 2234 ExprResult 2235 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 2236 MultiExprArg Args, 2237 SourceLocation RParenLoc); 2238 2239 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 2240 SourceLocation OpLoc); 2241 2242 /// CheckCallReturnType - Checks that a call expression's return type is 2243 /// complete. Returns true on failure. The location passed in is the location 2244 /// that best represents the call. 2245 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 2246 CallExpr *CE, FunctionDecl *FD); 2247 2248 /// Helpers for dealing with blocks and functions. 2249 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 2250 bool CheckParameterNames); 2251 void CheckCXXDefaultArguments(FunctionDecl *FD); 2252 void CheckExtraCXXDefaultArguments(Declarator &D); 2253 Scope *getNonFieldDeclScope(Scope *S); 2254 2255 /// \name Name lookup 2256 /// 2257 /// These routines provide name lookup that is used during semantic 2258 /// analysis to resolve the various kinds of names (identifiers, 2259 /// overloaded operator names, constructor names, etc.) into zero or 2260 /// more declarations within a particular scope. The major entry 2261 /// points are LookupName, which performs unqualified name lookup, 2262 /// and LookupQualifiedName, which performs qualified name lookup. 2263 /// 2264 /// All name lookup is performed based on some specific criteria, 2265 /// which specify what names will be visible to name lookup and how 2266 /// far name lookup should work. These criteria are important both 2267 /// for capturing language semantics (certain lookups will ignore 2268 /// certain names, for example) and for performance, since name 2269 /// lookup is often a bottleneck in the compilation of C++. Name 2270 /// lookup criteria is specified via the LookupCriteria enumeration. 2271 /// 2272 /// The results of name lookup can vary based on the kind of name 2273 /// lookup performed, the current language, and the translation 2274 /// unit. In C, for example, name lookup will either return nothing 2275 /// (no entity found) or a single declaration. In C++, name lookup 2276 /// can additionally refer to a set of overloaded functions or 2277 /// result in an ambiguity. All of the possible results of name 2278 /// lookup are captured by the LookupResult class, which provides 2279 /// the ability to distinguish among them. 2280 //@{ 2281 2282 /// @brief Describes the kind of name lookup to perform. 2283 enum LookupNameKind { 2284 /// Ordinary name lookup, which finds ordinary names (functions, 2285 /// variables, typedefs, etc.) in C and most kinds of names 2286 /// (functions, variables, members, types, etc.) in C++. 2287 LookupOrdinaryName = 0, 2288 /// Tag name lookup, which finds the names of enums, classes, 2289 /// structs, and unions. 2290 LookupTagName, 2291 /// Label name lookup. 2292 LookupLabel, 2293 /// Member name lookup, which finds the names of 2294 /// class/struct/union members. 2295 LookupMemberName, 2296 /// Look up of an operator name (e.g., operator+) for use with 2297 /// operator overloading. This lookup is similar to ordinary name 2298 /// lookup, but will ignore any declarations that are class members. 2299 LookupOperatorName, 2300 /// Look up of a name that precedes the '::' scope resolution 2301 /// operator in C++. This lookup completely ignores operator, object, 2302 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 2303 LookupNestedNameSpecifierName, 2304 /// Look up a namespace name within a C++ using directive or 2305 /// namespace alias definition, ignoring non-namespace names (C++ 2306 /// [basic.lookup.udir]p1). 2307 LookupNamespaceName, 2308 /// Look up all declarations in a scope with the given name, 2309 /// including resolved using declarations. This is appropriate 2310 /// for checking redeclarations for a using declaration. 2311 LookupUsingDeclName, 2312 /// Look up an ordinary name that is going to be redeclared as a 2313 /// name with linkage. This lookup ignores any declarations that 2314 /// are outside of the current scope unless they have linkage. See 2315 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 2316 LookupRedeclarationWithLinkage, 2317 /// Look up the name of an Objective-C protocol. 2318 LookupObjCProtocolName, 2319 /// Look up implicit 'self' parameter of an objective-c method. 2320 LookupObjCImplicitSelfParam, 2321 /// \brief Look up any declaration with any name. 2322 LookupAnyName 2323 }; 2324 2325 /// \brief Specifies whether (or how) name lookup is being performed for a 2326 /// redeclaration (vs. a reference). 2327 enum RedeclarationKind { 2328 /// \brief The lookup is a reference to this name that is not for the 2329 /// purpose of redeclaring the name. 2330 NotForRedeclaration = 0, 2331 /// \brief The lookup results will be used for redeclaration of a name, 2332 /// if an entity by that name already exists. 2333 ForRedeclaration 2334 }; 2335 2336 /// \brief The possible outcomes of name lookup for a literal operator. 2337 enum LiteralOperatorLookupResult { 2338 /// \brief The lookup resulted in an error. 2339 LOLR_Error, 2340 /// \brief The lookup found a single 'cooked' literal operator, which 2341 /// expects a normal literal to be built and passed to it. 2342 LOLR_Cooked, 2343 /// \brief The lookup found a single 'raw' literal operator, which expects 2344 /// a string literal containing the spelling of the literal token. 2345 LOLR_Raw, 2346 /// \brief The lookup found an overload set of literal operator templates, 2347 /// which expect the characters of the spelling of the literal token to be 2348 /// passed as a non-type template argument pack. 2349 LOLR_Template 2350 }; 2351 2352 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 2353 CXXSpecialMember SM, 2354 bool ConstArg, 2355 bool VolatileArg, 2356 bool RValueThis, 2357 bool ConstThis, 2358 bool VolatileThis); 2359 2360private: 2361 bool CppLookupName(LookupResult &R, Scope *S); 2362 2363 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 2364 // 2365 // The boolean value will be true to indicate that the namespace was loaded 2366 // from an AST/PCH file, or false otherwise. 2367 llvm::MapVector<NamespaceDecl*, bool> KnownNamespaces; 2368 2369 /// \brief Whether we have already loaded known namespaces from an extenal 2370 /// source. 2371 bool LoadedExternalKnownNamespaces; 2372 2373public: 2374 /// \brief Look up a name, looking for a single declaration. Return 2375 /// null if the results were absent, ambiguous, or overloaded. 2376 /// 2377 /// It is preferable to use the elaborated form and explicitly handle 2378 /// ambiguity and overloaded. 2379 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 2380 SourceLocation Loc, 2381 LookupNameKind NameKind, 2382 RedeclarationKind Redecl 2383 = NotForRedeclaration); 2384 bool LookupName(LookupResult &R, Scope *S, 2385 bool AllowBuiltinCreation = false); 2386 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 2387 bool InUnqualifiedLookup = false); 2388 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 2389 bool AllowBuiltinCreation = false, 2390 bool EnteringContext = false); 2391 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 2392 RedeclarationKind Redecl 2393 = NotForRedeclaration); 2394 2395 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 2396 QualType T1, QualType T2, 2397 UnresolvedSetImpl &Functions); 2398 2399 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 2400 SourceLocation GnuLabelLoc = SourceLocation()); 2401 2402 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 2403 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 2404 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 2405 unsigned Quals); 2406 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 2407 bool RValueThis, unsigned ThisQuals); 2408 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class, 2409 unsigned Quals); 2410 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, unsigned Quals, 2411 bool RValueThis, unsigned ThisQuals); 2412 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 2413 2414 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R, 2415 ArrayRef<QualType> ArgTys, 2416 bool AllowRawAndTemplate); 2417 bool isKnownName(StringRef name); 2418 2419 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 2420 SourceLocation Loc, 2421 ArrayRef<Expr *> Args, 2422 ADLResult &Functions); 2423 2424 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 2425 VisibleDeclConsumer &Consumer, 2426 bool IncludeGlobalScope = true); 2427 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 2428 VisibleDeclConsumer &Consumer, 2429 bool IncludeGlobalScope = true); 2430 2431 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 2432 Sema::LookupNameKind LookupKind, 2433 Scope *S, CXXScopeSpec *SS, 2434 CorrectionCandidateCallback &CCC, 2435 DeclContext *MemberContext = 0, 2436 bool EnteringContext = false, 2437 const ObjCObjectPointerType *OPT = 0); 2438 2439 void FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc, 2440 ArrayRef<Expr *> Args, 2441 AssociatedNamespaceSet &AssociatedNamespaces, 2442 AssociatedClassSet &AssociatedClasses); 2443 2444 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 2445 bool ConsiderLinkage, 2446 bool ExplicitInstantiationOrSpecialization); 2447 2448 bool DiagnoseAmbiguousLookup(LookupResult &Result); 2449 //@} 2450 2451 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 2452 SourceLocation IdLoc, 2453 bool TypoCorrection = false); 2454 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 2455 Scope *S, bool ForRedeclaration, 2456 SourceLocation Loc); 2457 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 2458 Scope *S); 2459 void AddKnownFunctionAttributes(FunctionDecl *FD); 2460 2461 // More parsing and symbol table subroutines. 2462 2463 void ProcessPragmaWeak(Scope *S, Decl *D); 2464 // Decl attributes - this routine is the top level dispatcher. 2465 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 2466 bool NonInheritable = true, 2467 bool Inheritable = true); 2468 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 2469 bool NonInheritable = true, 2470 bool Inheritable = true, 2471 bool IncludeCXX11Attributes = true); 2472 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 2473 const AttributeList *AttrList); 2474 2475 void checkUnusedDeclAttributes(Declarator &D); 2476 2477 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 2478 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC, 2479 const FunctionDecl *FD = 0); 2480 bool CheckNoReturnAttr(const AttributeList &attr); 2481 void CheckAlignasUnderalignment(Decl *D); 2482 2483 /// \brief Stmt attributes - this routine is the top level dispatcher. 2484 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs, 2485 SourceRange Range); 2486 2487 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 2488 bool &IncompleteImpl, unsigned DiagID); 2489 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 2490 ObjCMethodDecl *MethodDecl, 2491 bool IsProtocolMethodDecl); 2492 2493 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 2494 ObjCMethodDecl *Overridden, 2495 bool IsProtocolMethodDecl); 2496 2497 /// WarnExactTypedMethods - This routine issues a warning if method 2498 /// implementation declaration matches exactly that of its declaration. 2499 void WarnExactTypedMethods(ObjCMethodDecl *Method, 2500 ObjCMethodDecl *MethodDecl, 2501 bool IsProtocolMethodDecl); 2502 2503 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 2504 ObjCInterfaceDecl *IDecl); 2505 2506 typedef llvm::SmallPtrSet<Selector, 8> SelectorSet; 2507 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 2508 2509 /// CheckProtocolMethodDefs - This routine checks unimplemented 2510 /// methods declared in protocol, and those referenced by it. 2511 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 2512 ObjCProtocolDecl *PDecl, 2513 bool& IncompleteImpl, 2514 const SelectorSet &InsMap, 2515 const SelectorSet &ClsMap, 2516 ObjCContainerDecl *CDecl); 2517 2518 /// CheckImplementationIvars - This routine checks if the instance variables 2519 /// listed in the implelementation match those listed in the interface. 2520 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 2521 ObjCIvarDecl **Fields, unsigned nIvars, 2522 SourceLocation Loc); 2523 2524 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 2525 /// remains unimplemented in the class or category \@implementation. 2526 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 2527 ObjCContainerDecl* IDecl, 2528 bool IncompleteImpl = false); 2529 2530 /// DiagnoseUnimplementedProperties - This routine warns on those properties 2531 /// which must be implemented by this implementation. 2532 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 2533 ObjCContainerDecl *CDecl); 2534 2535 /// DefaultSynthesizeProperties - This routine default synthesizes all 2536 /// properties which must be synthesized in the class's \@implementation. 2537 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 2538 ObjCInterfaceDecl *IDecl); 2539 void DefaultSynthesizeProperties(Scope *S, Decl *D); 2540 2541 /// CollectImmediateProperties - This routine collects all properties in 2542 /// the class and its conforming protocols; but not those it its super class. 2543 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 2544 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 2545 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 2546 2547 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is 2548 /// an ivar synthesized for 'Method' and 'Method' is a property accessor 2549 /// declared in class 'IFace'. 2550 bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace, 2551 ObjCMethodDecl *Method, ObjCIvarDecl *IV); 2552 2553 /// Called by ActOnProperty to handle \@property declarations in 2554 /// class extensions. 2555 ObjCPropertyDecl *HandlePropertyInClassExtension(Scope *S, 2556 SourceLocation AtLoc, 2557 SourceLocation LParenLoc, 2558 FieldDeclarator &FD, 2559 Selector GetterSel, 2560 Selector SetterSel, 2561 const bool isAssign, 2562 const bool isReadWrite, 2563 const unsigned Attributes, 2564 const unsigned AttributesAsWritten, 2565 bool *isOverridingProperty, 2566 TypeSourceInfo *T, 2567 tok::ObjCKeywordKind MethodImplKind); 2568 2569 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2570 /// handle creating the ObjcPropertyDecl for a category or \@interface. 2571 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2572 ObjCContainerDecl *CDecl, 2573 SourceLocation AtLoc, 2574 SourceLocation LParenLoc, 2575 FieldDeclarator &FD, 2576 Selector GetterSel, 2577 Selector SetterSel, 2578 const bool isAssign, 2579 const bool isReadWrite, 2580 const unsigned Attributes, 2581 const unsigned AttributesAsWritten, 2582 TypeSourceInfo *T, 2583 tok::ObjCKeywordKind MethodImplKind, 2584 DeclContext *lexicalDC = 0); 2585 2586 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2587 /// warning) when atomic property has one but not the other user-declared 2588 /// setter or getter. 2589 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2590 ObjCContainerDecl* IDecl); 2591 2592 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2593 2594 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2595 2596 enum MethodMatchStrategy { 2597 MMS_loose, 2598 MMS_strict 2599 }; 2600 2601 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2602 /// true, or false, accordingly. 2603 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2604 const ObjCMethodDecl *PrevMethod, 2605 MethodMatchStrategy strategy = MMS_strict); 2606 2607 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2608 /// or protocol against those declared in their implementations. 2609 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2610 const SelectorSet &ClsMap, 2611 SelectorSet &InsMapSeen, 2612 SelectorSet &ClsMapSeen, 2613 ObjCImplDecl* IMPDecl, 2614 ObjCContainerDecl* IDecl, 2615 bool &IncompleteImpl, 2616 bool ImmediateClass, 2617 bool WarnCategoryMethodImpl=false); 2618 2619 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2620 /// category matches with those implemented in its primary class and 2621 /// warns each time an exact match is found. 2622 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2623 2624 /// \brief Add the given method to the list of globally-known methods. 2625 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2626 2627private: 2628 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2629 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2630 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2631 2632 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2633 /// optionally warns if there are multiple signatures. 2634 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2635 bool receiverIdOrClass, 2636 bool warn, bool instance); 2637 2638public: 2639 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2640 /// unit are added to a global pool. This allows us to efficiently associate 2641 /// a selector with a method declaraation for purposes of typechecking 2642 /// messages sent to "id" (where the class of the object is unknown). 2643 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2644 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2645 } 2646 2647 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2648 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2649 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2650 } 2651 2652 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2653 /// pool. 2654 void AddAnyMethodToGlobalPool(Decl *D); 2655 2656 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2657 /// there are multiple signatures. 2658 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2659 bool receiverIdOrClass=false, 2660 bool warn=true) { 2661 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2662 warn, /*instance*/true); 2663 } 2664 2665 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2666 /// there are multiple signatures. 2667 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2668 bool receiverIdOrClass=false, 2669 bool warn=true) { 2670 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2671 warn, /*instance*/false); 2672 } 2673 2674 const ObjCMethodDecl *SelectorsForTypoCorrection(Selector Sel); 2675 2676 /// DiagnoseMismatchedMethodsInGlobalPool - This routine goes through list of 2677 /// methods in global pool and issues diagnostic on identical selectors which 2678 /// have mismathched types. 2679 void DiagnoseMismatchedMethodsInGlobalPool(); 2680 2681 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2682 /// implementation. 2683 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2684 2685 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2686 /// initialization. 2687 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2688 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2689 2690 //===--------------------------------------------------------------------===// 2691 // Statement Parsing Callbacks: SemaStmt.cpp. 2692public: 2693 class FullExprArg { 2694 public: 2695 FullExprArg(Sema &actions) : E(0) { } 2696 2697 // FIXME: The const_cast here is ugly. RValue references would make this 2698 // much nicer (or we could duplicate a bunch of the move semantics 2699 // emulation code from Ownership.h). 2700 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2701 2702 ExprResult release() { 2703 return E; 2704 } 2705 2706 Expr *get() const { return E; } 2707 2708 Expr *operator->() { 2709 return E; 2710 } 2711 2712 private: 2713 // FIXME: No need to make the entire Sema class a friend when it's just 2714 // Sema::MakeFullExpr that needs access to the constructor below. 2715 friend class Sema; 2716 2717 explicit FullExprArg(Expr *expr) : E(expr) {} 2718 2719 Expr *E; 2720 }; 2721 2722 FullExprArg MakeFullExpr(Expr *Arg) { 2723 return MakeFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation()); 2724 } 2725 FullExprArg MakeFullExpr(Expr *Arg, SourceLocation CC) { 2726 return FullExprArg(ActOnFinishFullExpr(Arg, CC).release()); 2727 } 2728 FullExprArg MakeFullDiscardedValueExpr(Expr *Arg) { 2729 ExprResult FE = 2730 ActOnFinishFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation(), 2731 /*DiscardedValue*/ true); 2732 return FullExprArg(FE.release()); 2733 } 2734 2735 StmtResult ActOnExprStmt(ExprResult Arg); 2736 StmtResult ActOnExprStmtError(); 2737 2738 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2739 bool HasLeadingEmptyMacro = false); 2740 2741 void ActOnStartOfCompoundStmt(); 2742 void ActOnFinishOfCompoundStmt(); 2743 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2744 MultiStmtArg Elts, 2745 bool isStmtExpr); 2746 2747 /// \brief A RAII object to enter scope of a compound statement. 2748 class CompoundScopeRAII { 2749 public: 2750 CompoundScopeRAII(Sema &S): S(S) { 2751 S.ActOnStartOfCompoundStmt(); 2752 } 2753 2754 ~CompoundScopeRAII() { 2755 S.ActOnFinishOfCompoundStmt(); 2756 } 2757 2758 private: 2759 Sema &S; 2760 }; 2761 2762 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2763 SourceLocation StartLoc, 2764 SourceLocation EndLoc); 2765 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2766 StmtResult ActOnForEachLValueExpr(Expr *E); 2767 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2768 SourceLocation DotDotDotLoc, Expr *RHSVal, 2769 SourceLocation ColonLoc); 2770 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2771 2772 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2773 SourceLocation ColonLoc, 2774 Stmt *SubStmt, Scope *CurScope); 2775 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2776 SourceLocation ColonLoc, Stmt *SubStmt); 2777 2778 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc, 2779 ArrayRef<const Attr*> Attrs, 2780 Stmt *SubStmt); 2781 2782 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2783 FullExprArg CondVal, Decl *CondVar, 2784 Stmt *ThenVal, 2785 SourceLocation ElseLoc, Stmt *ElseVal); 2786 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2787 Expr *Cond, 2788 Decl *CondVar); 2789 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2790 Stmt *Switch, Stmt *Body); 2791 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2792 FullExprArg Cond, 2793 Decl *CondVar, Stmt *Body); 2794 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2795 SourceLocation WhileLoc, 2796 SourceLocation CondLParen, Expr *Cond, 2797 SourceLocation CondRParen); 2798 2799 StmtResult ActOnForStmt(SourceLocation ForLoc, 2800 SourceLocation LParenLoc, 2801 Stmt *First, FullExprArg Second, 2802 Decl *SecondVar, 2803 FullExprArg Third, 2804 SourceLocation RParenLoc, 2805 Stmt *Body); 2806 ExprResult CheckObjCForCollectionOperand(SourceLocation forLoc, 2807 Expr *collection); 2808 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2809 Stmt *First, Expr *collection, 2810 SourceLocation RParenLoc); 2811 StmtResult FinishObjCForCollectionStmt(Stmt *ForCollection, Stmt *Body); 2812 2813 enum BuildForRangeKind { 2814 /// Initial building of a for-range statement. 2815 BFRK_Build, 2816 /// Instantiation or recovery rebuild of a for-range statement. Don't 2817 /// attempt any typo-correction. 2818 BFRK_Rebuild, 2819 /// Determining whether a for-range statement could be built. Avoid any 2820 /// unnecessary or irreversible actions. 2821 BFRK_Check 2822 }; 2823 2824 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, Stmt *LoopVar, 2825 SourceLocation ColonLoc, Expr *Collection, 2826 SourceLocation RParenLoc, 2827 BuildForRangeKind Kind); 2828 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2829 SourceLocation ColonLoc, 2830 Stmt *RangeDecl, Stmt *BeginEndDecl, 2831 Expr *Cond, Expr *Inc, 2832 Stmt *LoopVarDecl, 2833 SourceLocation RParenLoc, 2834 BuildForRangeKind Kind); 2835 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2836 2837 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2838 SourceLocation LabelLoc, 2839 LabelDecl *TheDecl); 2840 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2841 SourceLocation StarLoc, 2842 Expr *DestExp); 2843 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2844 StmtResult ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope); 2845 2846 void ActOnCapturedRegionStart(SourceLocation Loc, Scope *CurScope, 2847 CapturedRegionKind Kind, unsigned NumParams); 2848 StmtResult ActOnCapturedRegionEnd(Stmt *S); 2849 void ActOnCapturedRegionError(); 2850 RecordDecl *CreateCapturedStmtRecordDecl(CapturedDecl *&CD, 2851 SourceLocation Loc, 2852 unsigned NumParams); 2853 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2854 bool AllowFunctionParameters); 2855 2856 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2857 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2858 2859 StmtResult ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple, 2860 bool IsVolatile, unsigned NumOutputs, 2861 unsigned NumInputs, IdentifierInfo **Names, 2862 MultiExprArg Constraints, MultiExprArg Exprs, 2863 Expr *AsmString, MultiExprArg Clobbers, 2864 SourceLocation RParenLoc); 2865 2866 ExprResult LookupInlineAsmIdentifier(CXXScopeSpec &SS, 2867 SourceLocation TemplateKWLoc, 2868 UnqualifiedId &Id, 2869 InlineAsmIdentifierInfo &Info, 2870 bool IsUnevaluatedContext); 2871 bool LookupInlineAsmField(StringRef Base, StringRef Member, 2872 unsigned &Offset, SourceLocation AsmLoc); 2873 StmtResult ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc, 2874 ArrayRef<Token> AsmToks, 2875 StringRef AsmString, 2876 unsigned NumOutputs, unsigned NumInputs, 2877 ArrayRef<StringRef> Constraints, 2878 ArrayRef<StringRef> Clobbers, 2879 ArrayRef<Expr*> Exprs, 2880 SourceLocation EndLoc); 2881 2882 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2883 SourceLocation StartLoc, 2884 SourceLocation IdLoc, IdentifierInfo *Id, 2885 bool Invalid = false); 2886 2887 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2888 2889 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2890 Decl *Parm, Stmt *Body); 2891 2892 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2893 2894 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2895 MultiStmtArg Catch, Stmt *Finally); 2896 2897 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2898 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2899 Scope *CurScope); 2900 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2901 Expr *operand); 2902 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2903 Expr *SynchExpr, 2904 Stmt *SynchBody); 2905 2906 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2907 2908 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2909 SourceLocation StartLoc, 2910 SourceLocation IdLoc, 2911 IdentifierInfo *Id); 2912 2913 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2914 2915 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2916 Decl *ExDecl, Stmt *HandlerBlock); 2917 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2918 MultiStmtArg Handlers); 2919 2920 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2921 SourceLocation TryLoc, 2922 Stmt *TryBlock, 2923 Stmt *Handler); 2924 2925 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2926 Expr *FilterExpr, 2927 Stmt *Block); 2928 2929 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2930 Stmt *Block); 2931 2932 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2933 2934 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2935 2936 /// \brief If it's a file scoped decl that must warn if not used, keep track 2937 /// of it. 2938 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2939 2940 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2941 /// whose result is unused, warn. 2942 void DiagnoseUnusedExprResult(const Stmt *S); 2943 void DiagnoseUnusedDecl(const NamedDecl *ND); 2944 2945 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2946 /// statement as a \p Body, and it is located on the same line. 2947 /// 2948 /// This helps prevent bugs due to typos, such as: 2949 /// if (condition); 2950 /// do_stuff(); 2951 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2952 const Stmt *Body, 2953 unsigned DiagID); 2954 2955 /// Warn if a for/while loop statement \p S, which is followed by 2956 /// \p PossibleBody, has a suspicious null statement as a body. 2957 void DiagnoseEmptyLoopBody(const Stmt *S, 2958 const Stmt *PossibleBody); 2959 2960 ParsingDeclState PushParsingDeclaration(sema::DelayedDiagnosticPool &pool) { 2961 return DelayedDiagnostics.push(pool); 2962 } 2963 void PopParsingDeclaration(ParsingDeclState state, Decl *decl); 2964 2965 typedef ProcessingContextState ParsingClassState; 2966 ParsingClassState PushParsingClass() { 2967 return DelayedDiagnostics.pushUndelayed(); 2968 } 2969 void PopParsingClass(ParsingClassState state) { 2970 DelayedDiagnostics.popUndelayed(state); 2971 } 2972 2973 void redelayDiagnostics(sema::DelayedDiagnosticPool &pool); 2974 2975 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2976 SourceLocation Loc, 2977 const ObjCInterfaceDecl *UnknownObjCClass, 2978 const ObjCPropertyDecl *ObjCProperty); 2979 2980 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2981 2982 bool makeUnavailableInSystemHeader(SourceLocation loc, 2983 StringRef message); 2984 2985 //===--------------------------------------------------------------------===// 2986 // Expression Parsing Callbacks: SemaExpr.cpp. 2987 2988 bool CanUseDecl(NamedDecl *D); 2989 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2990 const ObjCInterfaceDecl *UnknownObjCClass=0); 2991 void NoteDeletedFunction(FunctionDecl *FD); 2992 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2993 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2994 ObjCMethodDecl *Getter, 2995 SourceLocation Loc); 2996 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2997 ArrayRef<Expr *> Args); 2998 2999 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 3000 Decl *LambdaContextDecl = 0, 3001 bool IsDecltype = false); 3002 enum ReuseLambdaContextDecl_t { ReuseLambdaContextDecl }; 3003 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 3004 ReuseLambdaContextDecl_t, 3005 bool IsDecltype = false); 3006 void PopExpressionEvaluationContext(); 3007 3008 void DiscardCleanupsInEvaluationContext(); 3009 3010 ExprResult TransformToPotentiallyEvaluated(Expr *E); 3011 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 3012 3013 ExprResult ActOnConstantExpression(ExprResult Res); 3014 3015 // Functions for marking a declaration referenced. These functions also 3016 // contain the relevant logic for marking if a reference to a function or 3017 // variable is an odr-use (in the C++11 sense). There are separate variants 3018 // for expressions referring to a decl; these exist because odr-use marking 3019 // needs to be delayed for some constant variables when we build one of the 3020 // named expressions. 3021 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, bool OdrUse); 3022 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 3023 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 3024 void MarkDeclRefReferenced(DeclRefExpr *E); 3025 void MarkMemberReferenced(MemberExpr *E); 3026 3027 void UpdateMarkingForLValueToRValue(Expr *E); 3028 void CleanupVarDeclMarking(); 3029 3030 enum TryCaptureKind { 3031 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 3032 }; 3033 3034 /// \brief Try to capture the given variable. 3035 /// 3036 /// \param Var The variable to capture. 3037 /// 3038 /// \param Loc The location at which the capture occurs. 3039 /// 3040 /// \param Kind The kind of capture, which may be implicit (for either a 3041 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 3042 /// 3043 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 3044 /// an explicit lambda capture. 3045 /// 3046 /// \param BuildAndDiagnose Whether we are actually supposed to add the 3047 /// captures or diagnose errors. If false, this routine merely check whether 3048 /// the capture can occur without performing the capture itself or complaining 3049 /// if the variable cannot be captured. 3050 /// 3051 /// \param CaptureType Will be set to the type of the field used to capture 3052 /// this variable in the innermost block or lambda. Only valid when the 3053 /// variable can be captured. 3054 /// 3055 /// \param DeclRefType Will be set to the type of a reference to the capture 3056 /// from within the current scope. Only valid when the variable can be 3057 /// captured. 3058 /// 3059 /// \returns true if an error occurred (i.e., the variable cannot be 3060 /// captured) and false if the capture succeeded. 3061 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 3062 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 3063 QualType &CaptureType, 3064 QualType &DeclRefType); 3065 3066 /// \brief Try to capture the given variable. 3067 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 3068 TryCaptureKind Kind = TryCapture_Implicit, 3069 SourceLocation EllipsisLoc = SourceLocation()); 3070 3071 /// \brief Given a variable, determine the type that a reference to that 3072 /// variable will have in the given scope. 3073 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 3074 3075 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 3076 void MarkDeclarationsReferencedInExpr(Expr *E, 3077 bool SkipLocalVariables = false); 3078 3079 /// \brief Try to recover by turning the given expression into a 3080 /// call. Returns true if recovery was attempted or an error was 3081 /// emitted; this may also leave the ExprResult invalid. 3082 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 3083 bool ForceComplain = false, 3084 bool (*IsPlausibleResult)(QualType) = 0); 3085 3086 /// \brief Figure out if an expression could be turned into a call. 3087 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 3088 UnresolvedSetImpl &NonTemplateOverloads); 3089 3090 /// \brief Conditionally issue a diagnostic based on the current 3091 /// evaluation context. 3092 /// 3093 /// \param Statement If Statement is non-null, delay reporting the 3094 /// diagnostic until the function body is parsed, and then do a basic 3095 /// reachability analysis to determine if the statement is reachable. 3096 /// If it is unreachable, the diagnostic will not be emitted. 3097 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 3098 const PartialDiagnostic &PD); 3099 3100 // Primary Expressions. 3101 SourceRange getExprRange(Expr *E) const; 3102 3103 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 3104 SourceLocation TemplateKWLoc, 3105 UnqualifiedId &Id, 3106 bool HasTrailingLParen, bool IsAddressOfOperand, 3107 CorrectionCandidateCallback *CCC = 0, 3108 bool IsInlineAsmIdentifier = false); 3109 3110 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 3111 TemplateArgumentListInfo &Buffer, 3112 DeclarationNameInfo &NameInfo, 3113 const TemplateArgumentListInfo *&TemplateArgs); 3114 3115 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 3116 CorrectionCandidateCallback &CCC, 3117 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 3118 ArrayRef<Expr *> Args = None); 3119 3120 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 3121 IdentifierInfo *II, 3122 bool AllowBuiltinCreation=false); 3123 3124 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 3125 SourceLocation TemplateKWLoc, 3126 const DeclarationNameInfo &NameInfo, 3127 bool isAddressOfOperand, 3128 const TemplateArgumentListInfo *TemplateArgs); 3129 3130 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 3131 ExprValueKind VK, 3132 SourceLocation Loc, 3133 const CXXScopeSpec *SS = 0); 3134 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 3135 ExprValueKind VK, 3136 const DeclarationNameInfo &NameInfo, 3137 const CXXScopeSpec *SS = 0, 3138 NamedDecl *FoundD = 0); 3139 ExprResult 3140 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 3141 SourceLocation nameLoc, 3142 IndirectFieldDecl *indirectField, 3143 Expr *baseObjectExpr = 0, 3144 SourceLocation opLoc = SourceLocation()); 3145 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 3146 SourceLocation TemplateKWLoc, 3147 LookupResult &R, 3148 const TemplateArgumentListInfo *TemplateArgs); 3149 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 3150 SourceLocation TemplateKWLoc, 3151 LookupResult &R, 3152 const TemplateArgumentListInfo *TemplateArgs, 3153 bool IsDefiniteInstance); 3154 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 3155 const LookupResult &R, 3156 bool HasTrailingLParen); 3157 3158 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 3159 const DeclarationNameInfo &NameInfo, 3160 bool IsAddressOfOperand); 3161 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 3162 SourceLocation TemplateKWLoc, 3163 const DeclarationNameInfo &NameInfo, 3164 const TemplateArgumentListInfo *TemplateArgs); 3165 3166 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 3167 LookupResult &R, 3168 bool NeedsADL); 3169 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 3170 const DeclarationNameInfo &NameInfo, 3171 NamedDecl *D, NamedDecl *FoundD = 0); 3172 3173 ExprResult BuildLiteralOperatorCall(LookupResult &R, 3174 DeclarationNameInfo &SuffixInfo, 3175 ArrayRef<Expr*> Args, 3176 SourceLocation LitEndLoc, 3177 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 3178 3179 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 3180 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 3181 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0); 3182 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0); 3183 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 3184 ExprResult ActOnParenListExpr(SourceLocation L, 3185 SourceLocation R, 3186 MultiExprArg Val); 3187 3188 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 3189 /// fragments (e.g. "foo" "bar" L"baz"). 3190 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks, 3191 Scope *UDLScope = 0); 3192 3193 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 3194 SourceLocation DefaultLoc, 3195 SourceLocation RParenLoc, 3196 Expr *ControllingExpr, 3197 ArrayRef<ParsedType> ArgTypes, 3198 ArrayRef<Expr *> ArgExprs); 3199 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 3200 SourceLocation DefaultLoc, 3201 SourceLocation RParenLoc, 3202 Expr *ControllingExpr, 3203 ArrayRef<TypeSourceInfo *> Types, 3204 ArrayRef<Expr *> Exprs); 3205 3206 // Binary/Unary Operators. 'Tok' is the token for the operator. 3207 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 3208 Expr *InputExpr); 3209 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 3210 UnaryOperatorKind Opc, Expr *Input); 3211 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 3212 tok::TokenKind Op, Expr *Input); 3213 3214 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 3215 SourceLocation OpLoc, 3216 UnaryExprOrTypeTrait ExprKind, 3217 SourceRange R); 3218 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 3219 UnaryExprOrTypeTrait ExprKind); 3220 ExprResult 3221 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 3222 UnaryExprOrTypeTrait ExprKind, 3223 bool IsType, void *TyOrEx, 3224 const SourceRange &ArgRange); 3225 3226 ExprResult CheckPlaceholderExpr(Expr *E); 3227 bool CheckVecStepExpr(Expr *E); 3228 3229 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 3230 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 3231 SourceRange ExprRange, 3232 UnaryExprOrTypeTrait ExprKind); 3233 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 3234 SourceLocation OpLoc, 3235 IdentifierInfo &Name, 3236 SourceLocation NameLoc, 3237 SourceLocation RParenLoc); 3238 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 3239 tok::TokenKind Kind, Expr *Input); 3240 3241 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 3242 Expr *Idx, SourceLocation RLoc); 3243 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 3244 Expr *Idx, SourceLocation RLoc); 3245 3246 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 3247 SourceLocation OpLoc, bool IsArrow, 3248 CXXScopeSpec &SS, 3249 SourceLocation TemplateKWLoc, 3250 NamedDecl *FirstQualifierInScope, 3251 const DeclarationNameInfo &NameInfo, 3252 const TemplateArgumentListInfo *TemplateArgs); 3253 3254 // This struct is for use by ActOnMemberAccess to allow 3255 // BuildMemberReferenceExpr to be able to reinvoke ActOnMemberAccess after 3256 // changing the access operator from a '.' to a '->' (to see if that is the 3257 // change needed to fix an error about an unknown member, e.g. when the class 3258 // defines a custom operator->). 3259 struct ActOnMemberAccessExtraArgs { 3260 Scope *S; 3261 UnqualifiedId &Id; 3262 Decl *ObjCImpDecl; 3263 bool HasTrailingLParen; 3264 }; 3265 3266 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 3267 SourceLocation OpLoc, bool IsArrow, 3268 const CXXScopeSpec &SS, 3269 SourceLocation TemplateKWLoc, 3270 NamedDecl *FirstQualifierInScope, 3271 LookupResult &R, 3272 const TemplateArgumentListInfo *TemplateArgs, 3273 bool SuppressQualifierCheck = false, 3274 ActOnMemberAccessExtraArgs *ExtraArgs = 0); 3275 3276 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 3277 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 3278 bool &IsArrow, SourceLocation OpLoc, 3279 CXXScopeSpec &SS, 3280 Decl *ObjCImpDecl, 3281 bool HasTemplateArgs); 3282 3283 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 3284 const CXXScopeSpec &SS, 3285 const LookupResult &R); 3286 3287 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 3288 bool IsArrow, SourceLocation OpLoc, 3289 const CXXScopeSpec &SS, 3290 SourceLocation TemplateKWLoc, 3291 NamedDecl *FirstQualifierInScope, 3292 const DeclarationNameInfo &NameInfo, 3293 const TemplateArgumentListInfo *TemplateArgs); 3294 3295 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 3296 SourceLocation OpLoc, 3297 tok::TokenKind OpKind, 3298 CXXScopeSpec &SS, 3299 SourceLocation TemplateKWLoc, 3300 UnqualifiedId &Member, 3301 Decl *ObjCImpDecl, 3302 bool HasTrailingLParen); 3303 3304 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 3305 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 3306 FunctionDecl *FDecl, 3307 const FunctionProtoType *Proto, 3308 ArrayRef<Expr *> Args, 3309 SourceLocation RParenLoc, 3310 bool ExecConfig = false); 3311 void CheckStaticArrayArgument(SourceLocation CallLoc, 3312 ParmVarDecl *Param, 3313 const Expr *ArgExpr); 3314 3315 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 3316 /// This provides the location of the left/right parens and a list of comma 3317 /// locations. 3318 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 3319 MultiExprArg ArgExprs, SourceLocation RParenLoc, 3320 Expr *ExecConfig = 0, bool IsExecConfig = false); 3321 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 3322 SourceLocation LParenLoc, 3323 ArrayRef<Expr *> Arg, 3324 SourceLocation RParenLoc, 3325 Expr *Config = 0, 3326 bool IsExecConfig = false); 3327 3328 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 3329 MultiExprArg ExecConfig, 3330 SourceLocation GGGLoc); 3331 3332 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 3333 Declarator &D, ParsedType &Ty, 3334 SourceLocation RParenLoc, Expr *CastExpr); 3335 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 3336 TypeSourceInfo *Ty, 3337 SourceLocation RParenLoc, 3338 Expr *Op); 3339 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 3340 3341 /// \brief Build an altivec or OpenCL literal. 3342 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 3343 SourceLocation RParenLoc, Expr *E, 3344 TypeSourceInfo *TInfo); 3345 3346 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 3347 3348 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 3349 ParsedType Ty, 3350 SourceLocation RParenLoc, 3351 Expr *InitExpr); 3352 3353 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 3354 TypeSourceInfo *TInfo, 3355 SourceLocation RParenLoc, 3356 Expr *LiteralExpr); 3357 3358 ExprResult ActOnInitList(SourceLocation LBraceLoc, 3359 MultiExprArg InitArgList, 3360 SourceLocation RBraceLoc); 3361 3362 ExprResult ActOnDesignatedInitializer(Designation &Desig, 3363 SourceLocation Loc, 3364 bool GNUSyntax, 3365 ExprResult Init); 3366 3367 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 3368 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 3369 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 3370 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 3371 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 3372 Expr *LHSExpr, Expr *RHSExpr); 3373 3374 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 3375 /// in the case of a the GNU conditional expr extension. 3376 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 3377 SourceLocation ColonLoc, 3378 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 3379 3380 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 3381 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 3382 LabelDecl *TheDecl); 3383 3384 void ActOnStartStmtExpr(); 3385 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 3386 SourceLocation RPLoc); // "({..})" 3387 void ActOnStmtExprError(); 3388 3389 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 3390 struct OffsetOfComponent { 3391 SourceLocation LocStart, LocEnd; 3392 bool isBrackets; // true if [expr], false if .ident 3393 union { 3394 IdentifierInfo *IdentInfo; 3395 Expr *E; 3396 } U; 3397 }; 3398 3399 /// __builtin_offsetof(type, a.b[123][456].c) 3400 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 3401 TypeSourceInfo *TInfo, 3402 OffsetOfComponent *CompPtr, 3403 unsigned NumComponents, 3404 SourceLocation RParenLoc); 3405 ExprResult ActOnBuiltinOffsetOf(Scope *S, 3406 SourceLocation BuiltinLoc, 3407 SourceLocation TypeLoc, 3408 ParsedType ParsedArgTy, 3409 OffsetOfComponent *CompPtr, 3410 unsigned NumComponents, 3411 SourceLocation RParenLoc); 3412 3413 // __builtin_choose_expr(constExpr, expr1, expr2) 3414 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 3415 Expr *CondExpr, Expr *LHSExpr, 3416 Expr *RHSExpr, SourceLocation RPLoc); 3417 3418 // __builtin_va_arg(expr, type) 3419 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 3420 SourceLocation RPLoc); 3421 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 3422 TypeSourceInfo *TInfo, SourceLocation RPLoc); 3423 3424 // __null 3425 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 3426 3427 bool CheckCaseExpression(Expr *E); 3428 3429 /// \brief Describes the result of an "if-exists" condition check. 3430 enum IfExistsResult { 3431 /// \brief The symbol exists. 3432 IER_Exists, 3433 3434 /// \brief The symbol does not exist. 3435 IER_DoesNotExist, 3436 3437 /// \brief The name is a dependent name, so the results will differ 3438 /// from one instantiation to the next. 3439 IER_Dependent, 3440 3441 /// \brief An error occurred. 3442 IER_Error 3443 }; 3444 3445 IfExistsResult 3446 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 3447 const DeclarationNameInfo &TargetNameInfo); 3448 3449 IfExistsResult 3450 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 3451 bool IsIfExists, CXXScopeSpec &SS, 3452 UnqualifiedId &Name); 3453 3454 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 3455 bool IsIfExists, 3456 NestedNameSpecifierLoc QualifierLoc, 3457 DeclarationNameInfo NameInfo, 3458 Stmt *Nested); 3459 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 3460 bool IsIfExists, 3461 CXXScopeSpec &SS, UnqualifiedId &Name, 3462 Stmt *Nested); 3463 3464 //===------------------------- "Block" Extension ------------------------===// 3465 3466 /// ActOnBlockStart - This callback is invoked when a block literal is 3467 /// started. 3468 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 3469 3470 /// ActOnBlockArguments - This callback allows processing of block arguments. 3471 /// If there are no arguments, this is still invoked. 3472 void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo, 3473 Scope *CurScope); 3474 3475 /// ActOnBlockError - If there is an error parsing a block, this callback 3476 /// is invoked to pop the information about the block from the action impl. 3477 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 3478 3479 /// ActOnBlockStmtExpr - This is called when the body of a block statement 3480 /// literal was successfully completed. ^(int x){...} 3481 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 3482 Scope *CurScope); 3483 3484 //===---------------------------- OpenCL Features -----------------------===// 3485 3486 /// __builtin_astype(...) 3487 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 3488 SourceLocation BuiltinLoc, 3489 SourceLocation RParenLoc); 3490 3491 //===---------------------------- C++ Features --------------------------===// 3492 3493 // Act on C++ namespaces 3494 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 3495 SourceLocation NamespaceLoc, 3496 SourceLocation IdentLoc, 3497 IdentifierInfo *Ident, 3498 SourceLocation LBrace, 3499 AttributeList *AttrList); 3500 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 3501 3502 NamespaceDecl *getStdNamespace() const; 3503 NamespaceDecl *getOrCreateStdNamespace(); 3504 3505 CXXRecordDecl *getStdBadAlloc() const; 3506 3507 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 3508 /// it is and Element is not NULL, assigns the element type to Element. 3509 bool isStdInitializerList(QualType Ty, QualType *Element); 3510 3511 /// \brief Looks for the std::initializer_list template and instantiates it 3512 /// with Element, or emits an error if it's not found. 3513 /// 3514 /// \returns The instantiated template, or null on error. 3515 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 3516 3517 /// \brief Determine whether Ctor is an initializer-list constructor, as 3518 /// defined in [dcl.init.list]p2. 3519 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 3520 3521 Decl *ActOnUsingDirective(Scope *CurScope, 3522 SourceLocation UsingLoc, 3523 SourceLocation NamespcLoc, 3524 CXXScopeSpec &SS, 3525 SourceLocation IdentLoc, 3526 IdentifierInfo *NamespcName, 3527 AttributeList *AttrList); 3528 3529 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 3530 3531 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 3532 SourceLocation NamespaceLoc, 3533 SourceLocation AliasLoc, 3534 IdentifierInfo *Alias, 3535 CXXScopeSpec &SS, 3536 SourceLocation IdentLoc, 3537 IdentifierInfo *Ident); 3538 3539 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 3540 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 3541 const LookupResult &PreviousDecls); 3542 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 3543 NamedDecl *Target); 3544 3545 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 3546 bool isTypeName, 3547 const CXXScopeSpec &SS, 3548 SourceLocation NameLoc, 3549 const LookupResult &Previous); 3550 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 3551 const CXXScopeSpec &SS, 3552 SourceLocation NameLoc); 3553 3554 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 3555 SourceLocation UsingLoc, 3556 CXXScopeSpec &SS, 3557 const DeclarationNameInfo &NameInfo, 3558 AttributeList *AttrList, 3559 bool IsInstantiation, 3560 bool IsTypeName, 3561 SourceLocation TypenameLoc); 3562 3563 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD); 3564 3565 Decl *ActOnUsingDeclaration(Scope *CurScope, 3566 AccessSpecifier AS, 3567 bool HasUsingKeyword, 3568 SourceLocation UsingLoc, 3569 CXXScopeSpec &SS, 3570 UnqualifiedId &Name, 3571 AttributeList *AttrList, 3572 bool IsTypeName, 3573 SourceLocation TypenameLoc); 3574 Decl *ActOnAliasDeclaration(Scope *CurScope, 3575 AccessSpecifier AS, 3576 MultiTemplateParamsArg TemplateParams, 3577 SourceLocation UsingLoc, 3578 UnqualifiedId &Name, 3579 AttributeList *AttrList, 3580 TypeResult Type); 3581 3582 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 3583 /// including handling of its default argument expressions. 3584 /// 3585 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 3586 ExprResult 3587 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3588 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 3589 bool HadMultipleCandidates, bool IsListInitialization, 3590 bool RequiresZeroInit, unsigned ConstructKind, 3591 SourceRange ParenRange); 3592 3593 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 3594 // the constructor can be elidable? 3595 ExprResult 3596 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3597 CXXConstructorDecl *Constructor, bool Elidable, 3598 MultiExprArg Exprs, bool HadMultipleCandidates, 3599 bool IsListInitialization, bool RequiresZeroInit, 3600 unsigned ConstructKind, SourceRange ParenRange); 3601 3602 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 3603 /// the default expr if needed. 3604 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 3605 FunctionDecl *FD, 3606 ParmVarDecl *Param); 3607 3608 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 3609 /// constructed variable. 3610 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 3611 3612 /// \brief Helper class that collects exception specifications for 3613 /// implicitly-declared special member functions. 3614 class ImplicitExceptionSpecification { 3615 // Pointer to allow copying 3616 Sema *Self; 3617 // We order exception specifications thus: 3618 // noexcept is the most restrictive, but is only used in C++11. 3619 // throw() comes next. 3620 // Then a throw(collected exceptions) 3621 // Finally no specification, which is expressed as noexcept(false). 3622 // throw(...) is used instead if any called function uses it. 3623 ExceptionSpecificationType ComputedEST; 3624 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 3625 SmallVector<QualType, 4> Exceptions; 3626 3627 void ClearExceptions() { 3628 ExceptionsSeen.clear(); 3629 Exceptions.clear(); 3630 } 3631 3632 public: 3633 explicit ImplicitExceptionSpecification(Sema &Self) 3634 : Self(&Self), ComputedEST(EST_BasicNoexcept) { 3635 if (!Self.getLangOpts().CPlusPlus11) 3636 ComputedEST = EST_DynamicNone; 3637 } 3638 3639 /// \brief Get the computed exception specification type. 3640 ExceptionSpecificationType getExceptionSpecType() const { 3641 assert(ComputedEST != EST_ComputedNoexcept && 3642 "noexcept(expr) should not be a possible result"); 3643 return ComputedEST; 3644 } 3645 3646 /// \brief The number of exceptions in the exception specification. 3647 unsigned size() const { return Exceptions.size(); } 3648 3649 /// \brief The set of exceptions in the exception specification. 3650 const QualType *data() const { return Exceptions.data(); } 3651 3652 /// \brief Integrate another called method into the collected data. 3653 void CalledDecl(SourceLocation CallLoc, const CXXMethodDecl *Method); 3654 3655 /// \brief Integrate an invoked expression into the collected data. 3656 void CalledExpr(Expr *E); 3657 3658 /// \brief Overwrite an EPI's exception specification with this 3659 /// computed exception specification. 3660 void getEPI(FunctionProtoType::ExtProtoInfo &EPI) const { 3661 EPI.ExceptionSpecType = getExceptionSpecType(); 3662 if (EPI.ExceptionSpecType == EST_Dynamic) { 3663 EPI.NumExceptions = size(); 3664 EPI.Exceptions = data(); 3665 } else if (EPI.ExceptionSpecType == EST_None) { 3666 /// C++11 [except.spec]p14: 3667 /// The exception-specification is noexcept(false) if the set of 3668 /// potential exceptions of the special member function contains "any" 3669 EPI.ExceptionSpecType = EST_ComputedNoexcept; 3670 EPI.NoexceptExpr = Self->ActOnCXXBoolLiteral(SourceLocation(), 3671 tok::kw_false).take(); 3672 } 3673 } 3674 FunctionProtoType::ExtProtoInfo getEPI() const { 3675 FunctionProtoType::ExtProtoInfo EPI; 3676 getEPI(EPI); 3677 return EPI; 3678 } 3679 }; 3680 3681 /// \brief Determine what sort of exception specification a defaulted 3682 /// copy constructor of a class will have. 3683 ImplicitExceptionSpecification 3684 ComputeDefaultedDefaultCtorExceptionSpec(SourceLocation Loc, 3685 CXXMethodDecl *MD); 3686 3687 /// \brief Determine what sort of exception specification a defaulted 3688 /// default constructor of a class will have, and whether the parameter 3689 /// will be const. 3690 ImplicitExceptionSpecification 3691 ComputeDefaultedCopyCtorExceptionSpec(CXXMethodDecl *MD); 3692 3693 /// \brief Determine what sort of exception specification a defautled 3694 /// copy assignment operator of a class will have, and whether the 3695 /// parameter will be const. 3696 ImplicitExceptionSpecification 3697 ComputeDefaultedCopyAssignmentExceptionSpec(CXXMethodDecl *MD); 3698 3699 /// \brief Determine what sort of exception specification a defaulted move 3700 /// constructor of a class will have. 3701 ImplicitExceptionSpecification 3702 ComputeDefaultedMoveCtorExceptionSpec(CXXMethodDecl *MD); 3703 3704 /// \brief Determine what sort of exception specification a defaulted move 3705 /// assignment operator of a class will have. 3706 ImplicitExceptionSpecification 3707 ComputeDefaultedMoveAssignmentExceptionSpec(CXXMethodDecl *MD); 3708 3709 /// \brief Determine what sort of exception specification a defaulted 3710 /// destructor of a class will have. 3711 ImplicitExceptionSpecification 3712 ComputeDefaultedDtorExceptionSpec(CXXMethodDecl *MD); 3713 3714 /// \brief Determine what sort of exception specification an inheriting 3715 /// constructor of a class will have. 3716 ImplicitExceptionSpecification 3717 ComputeInheritingCtorExceptionSpec(CXXConstructorDecl *CD); 3718 3719 /// \brief Evaluate the implicit exception specification for a defaulted 3720 /// special member function. 3721 void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD); 3722 3723 /// \brief Check the given exception-specification and update the 3724 /// extended prototype information with the results. 3725 void checkExceptionSpecification(ExceptionSpecificationType EST, 3726 ArrayRef<ParsedType> DynamicExceptions, 3727 ArrayRef<SourceRange> DynamicExceptionRanges, 3728 Expr *NoexceptExpr, 3729 SmallVectorImpl<QualType> &Exceptions, 3730 FunctionProtoType::ExtProtoInfo &EPI); 3731 3732 /// \brief Determine if a special member function should have a deleted 3733 /// definition when it is defaulted. 3734 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, 3735 bool Diagnose = false); 3736 3737 /// \brief Declare the implicit default constructor for the given class. 3738 /// 3739 /// \param ClassDecl The class declaration into which the implicit 3740 /// default constructor will be added. 3741 /// 3742 /// \returns The implicitly-declared default constructor. 3743 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3744 CXXRecordDecl *ClassDecl); 3745 3746 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3747 /// defining this constructor as the default constructor. 3748 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3749 CXXConstructorDecl *Constructor); 3750 3751 /// \brief Declare the implicit destructor for the given class. 3752 /// 3753 /// \param ClassDecl The class declaration into which the implicit 3754 /// destructor will be added. 3755 /// 3756 /// \returns The implicitly-declared destructor. 3757 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3758 3759 /// DefineImplicitDestructor - Checks for feasibility of 3760 /// defining this destructor as the default destructor. 3761 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3762 CXXDestructorDecl *Destructor); 3763 3764 /// \brief Build an exception spec for destructors that don't have one. 3765 /// 3766 /// C++11 says that user-defined destructors with no exception spec get one 3767 /// that looks as if the destructor was implicitly declared. 3768 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3769 CXXDestructorDecl *Destructor); 3770 3771 /// \brief Declare all inheriting constructors for the given class. 3772 /// 3773 /// \param ClassDecl The class declaration into which the inheriting 3774 /// constructors will be added. 3775 void DeclareInheritingConstructors(CXXRecordDecl *ClassDecl); 3776 3777 /// \brief Define the specified inheriting constructor. 3778 void DefineInheritingConstructor(SourceLocation UseLoc, 3779 CXXConstructorDecl *Constructor); 3780 3781 /// \brief Declare the implicit copy constructor for the given class. 3782 /// 3783 /// \param ClassDecl The class declaration into which the implicit 3784 /// copy constructor will be added. 3785 /// 3786 /// \returns The implicitly-declared copy constructor. 3787 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3788 3789 /// DefineImplicitCopyConstructor - Checks for feasibility of 3790 /// defining this constructor as the copy constructor. 3791 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3792 CXXConstructorDecl *Constructor); 3793 3794 /// \brief Declare the implicit move constructor for the given class. 3795 /// 3796 /// \param ClassDecl The Class declaration into which the implicit 3797 /// move constructor will be added. 3798 /// 3799 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3800 /// declared. 3801 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3802 3803 /// DefineImplicitMoveConstructor - Checks for feasibility of 3804 /// defining this constructor as the move constructor. 3805 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3806 CXXConstructorDecl *Constructor); 3807 3808 /// \brief Declare the implicit copy assignment operator for the given class. 3809 /// 3810 /// \param ClassDecl The class declaration into which the implicit 3811 /// copy assignment operator will be added. 3812 /// 3813 /// \returns The implicitly-declared copy assignment operator. 3814 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3815 3816 /// \brief Defines an implicitly-declared copy assignment operator. 3817 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3818 CXXMethodDecl *MethodDecl); 3819 3820 /// \brief Declare the implicit move assignment operator for the given class. 3821 /// 3822 /// \param ClassDecl The Class declaration into which the implicit 3823 /// move assignment operator will be added. 3824 /// 3825 /// \returns The implicitly-declared move assignment operator, or NULL if it 3826 /// wasn't declared. 3827 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3828 3829 /// \brief Defines an implicitly-declared move assignment operator. 3830 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3831 CXXMethodDecl *MethodDecl); 3832 3833 /// \brief Force the declaration of any implicitly-declared members of this 3834 /// class. 3835 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3836 3837 /// \brief Determine whether the given function is an implicitly-deleted 3838 /// special member function. 3839 bool isImplicitlyDeleted(FunctionDecl *FD); 3840 3841 /// \brief Check whether 'this' shows up in the type of a static member 3842 /// function after the (naturally empty) cv-qualifier-seq would be. 3843 /// 3844 /// \returns true if an error occurred. 3845 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method); 3846 3847 /// \brief Whether this' shows up in the exception specification of a static 3848 /// member function. 3849 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method); 3850 3851 /// \brief Check whether 'this' shows up in the attributes of the given 3852 /// static member function. 3853 /// 3854 /// \returns true if an error occurred. 3855 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method); 3856 3857 /// MaybeBindToTemporary - If the passed in expression has a record type with 3858 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3859 /// it simply returns the passed in expression. 3860 ExprResult MaybeBindToTemporary(Expr *E); 3861 3862 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3863 MultiExprArg ArgsPtr, 3864 SourceLocation Loc, 3865 SmallVectorImpl<Expr*> &ConvertedArgs, 3866 bool AllowExplicit = false, 3867 bool IsListInitialization = false); 3868 3869 ParsedType getInheritingConstructorName(CXXScopeSpec &SS, 3870 SourceLocation NameLoc, 3871 IdentifierInfo &Name); 3872 3873 ParsedType getDestructorName(SourceLocation TildeLoc, 3874 IdentifierInfo &II, SourceLocation NameLoc, 3875 Scope *S, CXXScopeSpec &SS, 3876 ParsedType ObjectType, 3877 bool EnteringContext); 3878 3879 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3880 3881 // Checks that reinterpret casts don't have undefined behavior. 3882 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3883 bool IsDereference, SourceRange Range); 3884 3885 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3886 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3887 tok::TokenKind Kind, 3888 SourceLocation LAngleBracketLoc, 3889 Declarator &D, 3890 SourceLocation RAngleBracketLoc, 3891 SourceLocation LParenLoc, 3892 Expr *E, 3893 SourceLocation RParenLoc); 3894 3895 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3896 tok::TokenKind Kind, 3897 TypeSourceInfo *Ty, 3898 Expr *E, 3899 SourceRange AngleBrackets, 3900 SourceRange Parens); 3901 3902 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3903 SourceLocation TypeidLoc, 3904 TypeSourceInfo *Operand, 3905 SourceLocation RParenLoc); 3906 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3907 SourceLocation TypeidLoc, 3908 Expr *Operand, 3909 SourceLocation RParenLoc); 3910 3911 /// ActOnCXXTypeid - Parse typeid( something ). 3912 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3913 SourceLocation LParenLoc, bool isType, 3914 void *TyOrExpr, 3915 SourceLocation RParenLoc); 3916 3917 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3918 SourceLocation TypeidLoc, 3919 TypeSourceInfo *Operand, 3920 SourceLocation RParenLoc); 3921 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3922 SourceLocation TypeidLoc, 3923 Expr *Operand, 3924 SourceLocation RParenLoc); 3925 3926 /// ActOnCXXUuidof - Parse __uuidof( something ). 3927 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3928 SourceLocation LParenLoc, bool isType, 3929 void *TyOrExpr, 3930 SourceLocation RParenLoc); 3931 3932 3933 //// ActOnCXXThis - Parse 'this' pointer. 3934 ExprResult ActOnCXXThis(SourceLocation loc); 3935 3936 /// \brief Try to retrieve the type of the 'this' pointer. 3937 /// 3938 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3939 QualType getCurrentThisType(); 3940 3941 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the 3942 /// current context not being a non-static member function. In such cases, 3943 /// this provides the type used for 'this'. 3944 QualType CXXThisTypeOverride; 3945 3946 /// \brief RAII object used to temporarily allow the C++ 'this' expression 3947 /// to be used, with the given qualifiers on the current class type. 3948 class CXXThisScopeRAII { 3949 Sema &S; 3950 QualType OldCXXThisTypeOverride; 3951 bool Enabled; 3952 3953 public: 3954 /// \brief Introduce a new scope where 'this' may be allowed (when enabled), 3955 /// using the given declaration (which is either a class template or a 3956 /// class) along with the given qualifiers. 3957 /// along with the qualifiers placed on '*this'. 3958 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals, 3959 bool Enabled = true); 3960 3961 ~CXXThisScopeRAII(); 3962 }; 3963 3964 /// \brief Make sure the value of 'this' is actually available in the current 3965 /// context, if it is a potentially evaluated context. 3966 /// 3967 /// \param Loc The location at which the capture of 'this' occurs. 3968 /// 3969 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3970 /// capture list. 3971 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3972 3973 /// \brief Determine whether the given type is the type of *this that is used 3974 /// outside of the body of a member function for a type that is currently 3975 /// being defined. 3976 bool isThisOutsideMemberFunctionBody(QualType BaseType); 3977 3978 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3979 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3980 3981 3982 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3983 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3984 3985 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3986 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3987 3988 //// ActOnCXXThrow - Parse throw expressions. 3989 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3990 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3991 bool IsThrownVarInScope); 3992 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3993 bool IsThrownVarInScope); 3994 3995 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3996 /// Can be interpreted either as function-style casting ("int(x)") 3997 /// or class type construction ("ClassType(x,y,z)") 3998 /// or creation of a value-initialized type ("int()"). 3999 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 4000 SourceLocation LParenLoc, 4001 MultiExprArg Exprs, 4002 SourceLocation RParenLoc); 4003 4004 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 4005 SourceLocation LParenLoc, 4006 MultiExprArg Exprs, 4007 SourceLocation RParenLoc); 4008 4009 /// ActOnCXXNew - Parsed a C++ 'new' expression. 4010 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 4011 SourceLocation PlacementLParen, 4012 MultiExprArg PlacementArgs, 4013 SourceLocation PlacementRParen, 4014 SourceRange TypeIdParens, Declarator &D, 4015 Expr *Initializer); 4016 ExprResult BuildCXXNew(SourceRange Range, bool UseGlobal, 4017 SourceLocation PlacementLParen, 4018 MultiExprArg PlacementArgs, 4019 SourceLocation PlacementRParen, 4020 SourceRange TypeIdParens, 4021 QualType AllocType, 4022 TypeSourceInfo *AllocTypeInfo, 4023 Expr *ArraySize, 4024 SourceRange DirectInitRange, 4025 Expr *Initializer, 4026 bool TypeMayContainAuto = true); 4027 4028 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 4029 SourceRange R); 4030 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 4031 bool UseGlobal, QualType AllocType, bool IsArray, 4032 MultiExprArg PlaceArgs, 4033 FunctionDecl *&OperatorNew, 4034 FunctionDecl *&OperatorDelete); 4035 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 4036 DeclarationName Name, MultiExprArg Args, 4037 DeclContext *Ctx, 4038 bool AllowMissing, FunctionDecl *&Operator, 4039 bool Diagnose = true); 4040 void DeclareGlobalNewDelete(); 4041 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 4042 QualType Argument, 4043 bool addMallocAttr = false); 4044 4045 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 4046 DeclarationName Name, FunctionDecl* &Operator, 4047 bool Diagnose = true); 4048 4049 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 4050 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 4051 bool UseGlobal, bool ArrayForm, 4052 Expr *Operand); 4053 4054 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 4055 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 4056 SourceLocation StmtLoc, 4057 bool ConvertToBoolean); 4058 4059 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 4060 Expr *Operand, SourceLocation RParen); 4061 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 4062 SourceLocation RParen); 4063 4064 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 4065 /// pseudo-functions. 4066 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 4067 SourceLocation KWLoc, 4068 ParsedType Ty, 4069 SourceLocation RParen); 4070 4071 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 4072 SourceLocation KWLoc, 4073 TypeSourceInfo *T, 4074 SourceLocation RParen); 4075 4076 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 4077 /// pseudo-functions. 4078 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 4079 SourceLocation KWLoc, 4080 ParsedType LhsTy, 4081 ParsedType RhsTy, 4082 SourceLocation RParen); 4083 4084 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 4085 SourceLocation KWLoc, 4086 TypeSourceInfo *LhsT, 4087 TypeSourceInfo *RhsT, 4088 SourceLocation RParen); 4089 4090 /// \brief Parsed one of the type trait support pseudo-functions. 4091 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 4092 ArrayRef<ParsedType> Args, 4093 SourceLocation RParenLoc); 4094 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 4095 ArrayRef<TypeSourceInfo *> Args, 4096 SourceLocation RParenLoc); 4097 4098 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 4099 /// pseudo-functions. 4100 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 4101 SourceLocation KWLoc, 4102 ParsedType LhsTy, 4103 Expr *DimExpr, 4104 SourceLocation RParen); 4105 4106 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 4107 SourceLocation KWLoc, 4108 TypeSourceInfo *TSInfo, 4109 Expr *DimExpr, 4110 SourceLocation RParen); 4111 4112 /// ActOnExpressionTrait - Parsed one of the unary type trait support 4113 /// pseudo-functions. 4114 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 4115 SourceLocation KWLoc, 4116 Expr *Queried, 4117 SourceLocation RParen); 4118 4119 ExprResult BuildExpressionTrait(ExpressionTrait OET, 4120 SourceLocation KWLoc, 4121 Expr *Queried, 4122 SourceLocation RParen); 4123 4124 ExprResult ActOnStartCXXMemberReference(Scope *S, 4125 Expr *Base, 4126 SourceLocation OpLoc, 4127 tok::TokenKind OpKind, 4128 ParsedType &ObjectType, 4129 bool &MayBePseudoDestructor); 4130 4131 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 4132 4133 ExprResult BuildPseudoDestructorExpr(Expr *Base, 4134 SourceLocation OpLoc, 4135 tok::TokenKind OpKind, 4136 const CXXScopeSpec &SS, 4137 TypeSourceInfo *ScopeType, 4138 SourceLocation CCLoc, 4139 SourceLocation TildeLoc, 4140 PseudoDestructorTypeStorage DestroyedType, 4141 bool HasTrailingLParen); 4142 4143 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 4144 SourceLocation OpLoc, 4145 tok::TokenKind OpKind, 4146 CXXScopeSpec &SS, 4147 UnqualifiedId &FirstTypeName, 4148 SourceLocation CCLoc, 4149 SourceLocation TildeLoc, 4150 UnqualifiedId &SecondTypeName, 4151 bool HasTrailingLParen); 4152 4153 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 4154 SourceLocation OpLoc, 4155 tok::TokenKind OpKind, 4156 SourceLocation TildeLoc, 4157 const DeclSpec& DS, 4158 bool HasTrailingLParen); 4159 4160 /// MaybeCreateExprWithCleanups - If the current full-expression 4161 /// requires any cleanups, surround it with a ExprWithCleanups node. 4162 /// Otherwise, just returns the passed-in expression. 4163 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 4164 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 4165 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 4166 4167 ExprResult ActOnFinishFullExpr(Expr *Expr) { 4168 return ActOnFinishFullExpr(Expr, Expr ? Expr->getExprLoc() 4169 : SourceLocation()); 4170 } 4171 ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC, 4172 bool DiscardedValue = false, 4173 bool IsConstexpr = false); 4174 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 4175 4176 // Marks SS invalid if it represents an incomplete type. 4177 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 4178 4179 DeclContext *computeDeclContext(QualType T); 4180 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 4181 bool EnteringContext = false); 4182 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 4183 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 4184 bool isUnknownSpecialization(const CXXScopeSpec &SS); 4185 4186 /// \brief The parser has parsed a global nested-name-specifier '::'. 4187 /// 4188 /// \param S The scope in which this nested-name-specifier occurs. 4189 /// 4190 /// \param CCLoc The location of the '::'. 4191 /// 4192 /// \param SS The nested-name-specifier, which will be updated in-place 4193 /// to reflect the parsed nested-name-specifier. 4194 /// 4195 /// \returns true if an error occurred, false otherwise. 4196 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 4197 CXXScopeSpec &SS); 4198 4199 bool isAcceptableNestedNameSpecifier(const NamedDecl *SD); 4200 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 4201 4202 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 4203 SourceLocation IdLoc, 4204 IdentifierInfo &II, 4205 ParsedType ObjectType); 4206 4207 bool BuildCXXNestedNameSpecifier(Scope *S, 4208 IdentifierInfo &Identifier, 4209 SourceLocation IdentifierLoc, 4210 SourceLocation CCLoc, 4211 QualType ObjectType, 4212 bool EnteringContext, 4213 CXXScopeSpec &SS, 4214 NamedDecl *ScopeLookupResult, 4215 bool ErrorRecoveryLookup); 4216 4217 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 4218 /// 4219 /// \param S The scope in which this nested-name-specifier occurs. 4220 /// 4221 /// \param Identifier The identifier preceding the '::'. 4222 /// 4223 /// \param IdentifierLoc The location of the identifier. 4224 /// 4225 /// \param CCLoc The location of the '::'. 4226 /// 4227 /// \param ObjectType The type of the object, if we're parsing 4228 /// nested-name-specifier in a member access expression. 4229 /// 4230 /// \param EnteringContext Whether we're entering the context nominated by 4231 /// this nested-name-specifier. 4232 /// 4233 /// \param SS The nested-name-specifier, which is both an input 4234 /// parameter (the nested-name-specifier before this type) and an 4235 /// output parameter (containing the full nested-name-specifier, 4236 /// including this new type). 4237 /// 4238 /// \returns true if an error occurred, false otherwise. 4239 bool ActOnCXXNestedNameSpecifier(Scope *S, 4240 IdentifierInfo &Identifier, 4241 SourceLocation IdentifierLoc, 4242 SourceLocation CCLoc, 4243 ParsedType ObjectType, 4244 bool EnteringContext, 4245 CXXScopeSpec &SS); 4246 4247 ExprResult ActOnDecltypeExpression(Expr *E); 4248 4249 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 4250 const DeclSpec &DS, 4251 SourceLocation ColonColonLoc); 4252 4253 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 4254 IdentifierInfo &Identifier, 4255 SourceLocation IdentifierLoc, 4256 SourceLocation ColonLoc, 4257 ParsedType ObjectType, 4258 bool EnteringContext); 4259 4260 /// \brief The parser has parsed a nested-name-specifier 4261 /// 'template[opt] template-name < template-args >::'. 4262 /// 4263 /// \param S The scope in which this nested-name-specifier occurs. 4264 /// 4265 /// \param SS The nested-name-specifier, which is both an input 4266 /// parameter (the nested-name-specifier before this type) and an 4267 /// output parameter (containing the full nested-name-specifier, 4268 /// including this new type). 4269 /// 4270 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 4271 /// \param TemplateName the template name. 4272 /// \param TemplateNameLoc The location of the template name. 4273 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4274 /// \param TemplateArgs The template arguments. 4275 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4276 /// \param CCLoc The location of the '::'. 4277 /// 4278 /// \param EnteringContext Whether we're entering the context of the 4279 /// nested-name-specifier. 4280 /// 4281 /// 4282 /// \returns true if an error occurred, false otherwise. 4283 bool ActOnCXXNestedNameSpecifier(Scope *S, 4284 CXXScopeSpec &SS, 4285 SourceLocation TemplateKWLoc, 4286 TemplateTy TemplateName, 4287 SourceLocation TemplateNameLoc, 4288 SourceLocation LAngleLoc, 4289 ASTTemplateArgsPtr TemplateArgs, 4290 SourceLocation RAngleLoc, 4291 SourceLocation CCLoc, 4292 bool EnteringContext); 4293 4294 /// \brief Given a C++ nested-name-specifier, produce an annotation value 4295 /// that the parser can use later to reconstruct the given 4296 /// nested-name-specifier. 4297 /// 4298 /// \param SS A nested-name-specifier. 4299 /// 4300 /// \returns A pointer containing all of the information in the 4301 /// nested-name-specifier \p SS. 4302 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 4303 4304 /// \brief Given an annotation pointer for a nested-name-specifier, restore 4305 /// the nested-name-specifier structure. 4306 /// 4307 /// \param Annotation The annotation pointer, produced by 4308 /// \c SaveNestedNameSpecifierAnnotation(). 4309 /// 4310 /// \param AnnotationRange The source range corresponding to the annotation. 4311 /// 4312 /// \param SS The nested-name-specifier that will be updated with the contents 4313 /// of the annotation pointer. 4314 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 4315 SourceRange AnnotationRange, 4316 CXXScopeSpec &SS); 4317 4318 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 4319 4320 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 4321 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 4322 /// After this method is called, according to [C++ 3.4.3p3], names should be 4323 /// looked up in the declarator-id's scope, until the declarator is parsed and 4324 /// ActOnCXXExitDeclaratorScope is called. 4325 /// The 'SS' should be a non-empty valid CXXScopeSpec. 4326 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 4327 4328 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 4329 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 4330 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 4331 /// Used to indicate that names should revert to being looked up in the 4332 /// defining scope. 4333 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 4334 4335 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 4336 /// initializer for the declaration 'Dcl'. 4337 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 4338 /// static data member of class X, names should be looked up in the scope of 4339 /// class X. 4340 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 4341 4342 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 4343 /// initializer for the declaration 'Dcl'. 4344 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 4345 4346 /// \brief Create a new lambda closure type. 4347 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 4348 TypeSourceInfo *Info, 4349 bool KnownDependent); 4350 4351 /// \brief Start the definition of a lambda expression. 4352 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 4353 SourceRange IntroducerRange, 4354 TypeSourceInfo *MethodType, 4355 SourceLocation EndLoc, 4356 ArrayRef<ParmVarDecl *> Params); 4357 4358 /// \brief Introduce the scope for a lambda expression. 4359 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 4360 SourceRange IntroducerRange, 4361 LambdaCaptureDefault CaptureDefault, 4362 bool ExplicitParams, 4363 bool ExplicitResultType, 4364 bool Mutable); 4365 4366 /// \brief Check and build an init-capture with the specified name and 4367 /// initializer. 4368 FieldDecl *checkInitCapture(SourceLocation Loc, bool ByRef, 4369 IdentifierInfo *Id, Expr *Init); 4370 4371 /// \brief Note that we have finished the explicit captures for the 4372 /// given lambda. 4373 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 4374 4375 /// \brief Introduce the lambda parameters into scope. 4376 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 4377 4378 /// \brief Deduce a block or lambda's return type based on the return 4379 /// statements present in the body. 4380 void deduceClosureReturnType(sema::CapturingScopeInfo &CSI); 4381 4382 /// ActOnStartOfLambdaDefinition - This is called just before we start 4383 /// parsing the body of a lambda; it analyzes the explicit captures and 4384 /// arguments, and sets up various data-structures for the body of the 4385 /// lambda. 4386 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 4387 Declarator &ParamInfo, Scope *CurScope); 4388 4389 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 4390 /// is invoked to pop the information about the lambda. 4391 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 4392 bool IsInstantiation = false); 4393 4394 /// ActOnLambdaExpr - This is called when the body of a lambda expression 4395 /// was successfully completed. 4396 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 4397 Scope *CurScope, 4398 bool IsInstantiation = false); 4399 4400 /// \brief Define the "body" of the conversion from a lambda object to a 4401 /// function pointer. 4402 /// 4403 /// This routine doesn't actually define a sensible body; rather, it fills 4404 /// in the initialization expression needed to copy the lambda object into 4405 /// the block, and IR generation actually generates the real body of the 4406 /// block pointer conversion. 4407 void DefineImplicitLambdaToFunctionPointerConversion( 4408 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 4409 4410 /// \brief Define the "body" of the conversion from a lambda object to a 4411 /// block pointer. 4412 /// 4413 /// This routine doesn't actually define a sensible body; rather, it fills 4414 /// in the initialization expression needed to copy the lambda object into 4415 /// the block, and IR generation actually generates the real body of the 4416 /// block pointer conversion. 4417 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 4418 CXXConversionDecl *Conv); 4419 4420 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 4421 SourceLocation ConvLocation, 4422 CXXConversionDecl *Conv, 4423 Expr *Src); 4424 4425 // ParseObjCStringLiteral - Parse Objective-C string literals. 4426 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 4427 Expr **Strings, 4428 unsigned NumStrings); 4429 4430 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 4431 4432 /// BuildObjCNumericLiteral - builds an ObjCBoxedExpr AST node for the 4433 /// numeric literal expression. Type of the expression will be "NSNumber *" 4434 /// or "id" if NSNumber is unavailable. 4435 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 4436 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 4437 bool Value); 4438 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 4439 4440 /// BuildObjCBoxedExpr - builds an ObjCBoxedExpr AST node for the 4441 /// '@' prefixed parenthesized expression. The type of the expression will 4442 /// either be "NSNumber *" or "NSString *" depending on the type of 4443 /// ValueType, which is allowed to be a built-in numeric type or 4444 /// "char *" or "const char *". 4445 ExprResult BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr); 4446 4447 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 4448 Expr *IndexExpr, 4449 ObjCMethodDecl *getterMethod, 4450 ObjCMethodDecl *setterMethod); 4451 4452 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 4453 ObjCDictionaryElement *Elements, 4454 unsigned NumElements); 4455 4456 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 4457 TypeSourceInfo *EncodedTypeInfo, 4458 SourceLocation RParenLoc); 4459 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 4460 CXXConversionDecl *Method, 4461 bool HadMultipleCandidates); 4462 4463 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 4464 SourceLocation EncodeLoc, 4465 SourceLocation LParenLoc, 4466 ParsedType Ty, 4467 SourceLocation RParenLoc); 4468 4469 /// ParseObjCSelectorExpression - Build selector expression for \@selector 4470 ExprResult ParseObjCSelectorExpression(Selector Sel, 4471 SourceLocation AtLoc, 4472 SourceLocation SelLoc, 4473 SourceLocation LParenLoc, 4474 SourceLocation RParenLoc); 4475 4476 /// ParseObjCProtocolExpression - Build protocol expression for \@protocol 4477 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 4478 SourceLocation AtLoc, 4479 SourceLocation ProtoLoc, 4480 SourceLocation LParenLoc, 4481 SourceLocation ProtoIdLoc, 4482 SourceLocation RParenLoc); 4483 4484 //===--------------------------------------------------------------------===// 4485 // C++ Declarations 4486 // 4487 Decl *ActOnStartLinkageSpecification(Scope *S, 4488 SourceLocation ExternLoc, 4489 SourceLocation LangLoc, 4490 StringRef Lang, 4491 SourceLocation LBraceLoc); 4492 Decl *ActOnFinishLinkageSpecification(Scope *S, 4493 Decl *LinkageSpec, 4494 SourceLocation RBraceLoc); 4495 4496 4497 //===--------------------------------------------------------------------===// 4498 // C++ Classes 4499 // 4500 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 4501 const CXXScopeSpec *SS = 0); 4502 4503 bool ActOnAccessSpecifier(AccessSpecifier Access, 4504 SourceLocation ASLoc, 4505 SourceLocation ColonLoc, 4506 AttributeList *Attrs = 0); 4507 4508 NamedDecl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 4509 Declarator &D, 4510 MultiTemplateParamsArg TemplateParameterLists, 4511 Expr *BitfieldWidth, const VirtSpecifiers &VS, 4512 InClassInitStyle InitStyle); 4513 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 4514 Expr *Init); 4515 4516 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 4517 Scope *S, 4518 CXXScopeSpec &SS, 4519 IdentifierInfo *MemberOrBase, 4520 ParsedType TemplateTypeTy, 4521 const DeclSpec &DS, 4522 SourceLocation IdLoc, 4523 SourceLocation LParenLoc, 4524 ArrayRef<Expr *> Args, 4525 SourceLocation RParenLoc, 4526 SourceLocation EllipsisLoc); 4527 4528 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 4529 Scope *S, 4530 CXXScopeSpec &SS, 4531 IdentifierInfo *MemberOrBase, 4532 ParsedType TemplateTypeTy, 4533 const DeclSpec &DS, 4534 SourceLocation IdLoc, 4535 Expr *InitList, 4536 SourceLocation EllipsisLoc); 4537 4538 MemInitResult BuildMemInitializer(Decl *ConstructorD, 4539 Scope *S, 4540 CXXScopeSpec &SS, 4541 IdentifierInfo *MemberOrBase, 4542 ParsedType TemplateTypeTy, 4543 const DeclSpec &DS, 4544 SourceLocation IdLoc, 4545 Expr *Init, 4546 SourceLocation EllipsisLoc); 4547 4548 MemInitResult BuildMemberInitializer(ValueDecl *Member, 4549 Expr *Init, 4550 SourceLocation IdLoc); 4551 4552 MemInitResult BuildBaseInitializer(QualType BaseType, 4553 TypeSourceInfo *BaseTInfo, 4554 Expr *Init, 4555 CXXRecordDecl *ClassDecl, 4556 SourceLocation EllipsisLoc); 4557 4558 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 4559 Expr *Init, 4560 CXXRecordDecl *ClassDecl); 4561 4562 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 4563 CXXCtorInitializer *Initializer); 4564 4565 bool SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors, 4566 ArrayRef<CXXCtorInitializer *> Initializers = None); 4567 4568 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 4569 4570 4571 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 4572 /// mark all the non-trivial destructors of its members and bases as 4573 /// referenced. 4574 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 4575 CXXRecordDecl *Record); 4576 4577 /// \brief The list of classes whose vtables have been used within 4578 /// this translation unit, and the source locations at which the 4579 /// first use occurred. 4580 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 4581 4582 /// \brief The list of vtables that are required but have not yet been 4583 /// materialized. 4584 SmallVector<VTableUse, 16> VTableUses; 4585 4586 /// \brief The set of classes whose vtables have been used within 4587 /// this translation unit, and a bit that will be true if the vtable is 4588 /// required to be emitted (otherwise, it should be emitted only if needed 4589 /// by code generation). 4590 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 4591 4592 /// \brief Load any externally-stored vtable uses. 4593 void LoadExternalVTableUses(); 4594 4595 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 4596 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 4597 DynamicClassesType; 4598 4599 /// \brief A list of all of the dynamic classes in this translation 4600 /// unit. 4601 DynamicClassesType DynamicClasses; 4602 4603 /// \brief Note that the vtable for the given class was used at the 4604 /// given location. 4605 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 4606 bool DefinitionRequired = false); 4607 4608 /// \brief Mark the exception specifications of all virtual member functions 4609 /// in the given class as needed. 4610 void MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc, 4611 const CXXRecordDecl *RD); 4612 4613 /// MarkVirtualMembersReferenced - Will mark all members of the given 4614 /// CXXRecordDecl referenced. 4615 void MarkVirtualMembersReferenced(SourceLocation Loc, 4616 const CXXRecordDecl *RD); 4617 4618 /// \brief Define all of the vtables that have been used in this 4619 /// translation unit and reference any virtual members used by those 4620 /// vtables. 4621 /// 4622 /// \returns true if any work was done, false otherwise. 4623 bool DefineUsedVTables(); 4624 4625 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 4626 4627 void ActOnMemInitializers(Decl *ConstructorDecl, 4628 SourceLocation ColonLoc, 4629 ArrayRef<CXXCtorInitializer*> MemInits, 4630 bool AnyErrors); 4631 4632 void CheckCompletedCXXClass(CXXRecordDecl *Record); 4633 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 4634 Decl *TagDecl, 4635 SourceLocation LBrac, 4636 SourceLocation RBrac, 4637 AttributeList *AttrList); 4638 void ActOnFinishCXXMemberDecls(); 4639 4640 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 4641 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 4642 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 4643 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4644 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 4645 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 4646 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4647 void ActOnFinishDelayedMemberInitializers(Decl *Record); 4648 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 4649 bool IsInsideALocalClassWithinATemplateFunction(); 4650 4651 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 4652 Expr *AssertExpr, 4653 Expr *AssertMessageExpr, 4654 SourceLocation RParenLoc); 4655 Decl *BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc, 4656 Expr *AssertExpr, 4657 StringLiteral *AssertMessageExpr, 4658 SourceLocation RParenLoc, 4659 bool Failed); 4660 4661 FriendDecl *CheckFriendTypeDecl(SourceLocation LocStart, 4662 SourceLocation FriendLoc, 4663 TypeSourceInfo *TSInfo); 4664 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 4665 MultiTemplateParamsArg TemplateParams); 4666 NamedDecl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 4667 MultiTemplateParamsArg TemplateParams); 4668 4669 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 4670 StorageClass& SC); 4671 void CheckConstructor(CXXConstructorDecl *Constructor); 4672 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 4673 StorageClass& SC); 4674 bool CheckDestructor(CXXDestructorDecl *Destructor); 4675 void CheckConversionDeclarator(Declarator &D, QualType &R, 4676 StorageClass& SC); 4677 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 4678 4679 void CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD); 4680 void CheckExplicitlyDefaultedMemberExceptionSpec(CXXMethodDecl *MD, 4681 const FunctionProtoType *T); 4682 void CheckDelayedExplicitlyDefaultedMemberExceptionSpecs(); 4683 4684 //===--------------------------------------------------------------------===// 4685 // C++ Derived Classes 4686 // 4687 4688 /// ActOnBaseSpecifier - Parsed a base specifier 4689 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 4690 SourceRange SpecifierRange, 4691 bool Virtual, AccessSpecifier Access, 4692 TypeSourceInfo *TInfo, 4693 SourceLocation EllipsisLoc); 4694 4695 BaseResult ActOnBaseSpecifier(Decl *classdecl, 4696 SourceRange SpecifierRange, 4697 ParsedAttributes &Attrs, 4698 bool Virtual, AccessSpecifier Access, 4699 ParsedType basetype, 4700 SourceLocation BaseLoc, 4701 SourceLocation EllipsisLoc); 4702 4703 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 4704 unsigned NumBases); 4705 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 4706 unsigned NumBases); 4707 4708 bool IsDerivedFrom(QualType Derived, QualType Base); 4709 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 4710 4711 // FIXME: I don't like this name. 4712 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 4713 4714 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 4715 4716 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4717 SourceLocation Loc, SourceRange Range, 4718 CXXCastPath *BasePath = 0, 4719 bool IgnoreAccess = false); 4720 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4721 unsigned InaccessibleBaseID, 4722 unsigned AmbigiousBaseConvID, 4723 SourceLocation Loc, SourceRange Range, 4724 DeclarationName Name, 4725 CXXCastPath *BasePath); 4726 4727 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 4728 4729 bool CheckOverridingFunctionAttributes(const CXXMethodDecl *New, 4730 const CXXMethodDecl *Old); 4731 4732 /// CheckOverridingFunctionReturnType - Checks whether the return types are 4733 /// covariant, according to C++ [class.virtual]p5. 4734 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 4735 const CXXMethodDecl *Old); 4736 4737 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 4738 /// spec is a subset of base spec. 4739 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4740 const CXXMethodDecl *Old); 4741 4742 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4743 4744 /// CheckOverrideControl - Check C++11 override control semantics. 4745 void CheckOverrideControl(Decl *D); 4746 4747 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4748 /// overrides a virtual member function marked 'final', according to 4749 /// C++11 [class.virtual]p4. 4750 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4751 const CXXMethodDecl *Old); 4752 4753 4754 //===--------------------------------------------------------------------===// 4755 // C++ Access Control 4756 // 4757 4758 enum AccessResult { 4759 AR_accessible, 4760 AR_inaccessible, 4761 AR_dependent, 4762 AR_delayed 4763 }; 4764 4765 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4766 NamedDecl *PrevMemberDecl, 4767 AccessSpecifier LexicalAS); 4768 4769 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4770 DeclAccessPair FoundDecl); 4771 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4772 DeclAccessPair FoundDecl); 4773 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4774 SourceRange PlacementRange, 4775 CXXRecordDecl *NamingClass, 4776 DeclAccessPair FoundDecl, 4777 bool Diagnose = true); 4778 AccessResult CheckConstructorAccess(SourceLocation Loc, 4779 CXXConstructorDecl *D, 4780 const InitializedEntity &Entity, 4781 AccessSpecifier Access, 4782 bool IsCopyBindingRefToTemp = false); 4783 AccessResult CheckConstructorAccess(SourceLocation Loc, 4784 CXXConstructorDecl *D, 4785 const InitializedEntity &Entity, 4786 AccessSpecifier Access, 4787 const PartialDiagnostic &PDiag); 4788 AccessResult CheckDestructorAccess(SourceLocation Loc, 4789 CXXDestructorDecl *Dtor, 4790 const PartialDiagnostic &PDiag, 4791 QualType objectType = QualType()); 4792 AccessResult CheckFriendAccess(NamedDecl *D); 4793 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4794 Expr *ObjectExpr, 4795 Expr *ArgExpr, 4796 DeclAccessPair FoundDecl); 4797 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4798 DeclAccessPair FoundDecl); 4799 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4800 QualType Base, QualType Derived, 4801 const CXXBasePath &Path, 4802 unsigned DiagID, 4803 bool ForceCheck = false, 4804 bool ForceUnprivileged = false); 4805 void CheckLookupAccess(const LookupResult &R); 4806 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4807 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl, 4808 AccessSpecifier access, 4809 QualType objectType); 4810 4811 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4812 const MultiLevelTemplateArgumentList &TemplateArgs); 4813 void PerformDependentDiagnostics(const DeclContext *Pattern, 4814 const MultiLevelTemplateArgumentList &TemplateArgs); 4815 4816 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4817 4818 /// \brief When true, access checking violations are treated as SFINAE 4819 /// failures rather than hard errors. 4820 bool AccessCheckingSFINAE; 4821 4822 enum AbstractDiagSelID { 4823 AbstractNone = -1, 4824 AbstractReturnType, 4825 AbstractParamType, 4826 AbstractVariableType, 4827 AbstractFieldType, 4828 AbstractIvarType, 4829 AbstractArrayType 4830 }; 4831 4832 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4833 TypeDiagnoser &Diagnoser); 4834 template<typename T1> 4835 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4836 unsigned DiagID, 4837 const T1 &Arg1) { 4838 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 4839 return RequireNonAbstractType(Loc, T, Diagnoser); 4840 } 4841 4842 template<typename T1, typename T2> 4843 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4844 unsigned DiagID, 4845 const T1 &Arg1, const T2 &Arg2) { 4846 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 4847 return RequireNonAbstractType(Loc, T, Diagnoser); 4848 } 4849 4850 template<typename T1, typename T2, typename T3> 4851 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4852 unsigned DiagID, 4853 const T1 &Arg1, const T2 &Arg2, const T3 &Arg3) { 4854 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, Arg3); 4855 return RequireNonAbstractType(Loc, T, Diagnoser); 4856 } 4857 4858 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4859 4860 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4861 AbstractDiagSelID SelID = AbstractNone); 4862 4863 //===--------------------------------------------------------------------===// 4864 // C++ Overloaded Operators [C++ 13.5] 4865 // 4866 4867 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4868 4869 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4870 4871 //===--------------------------------------------------------------------===// 4872 // C++ Templates [C++ 14] 4873 // 4874 void FilterAcceptableTemplateNames(LookupResult &R, 4875 bool AllowFunctionTemplates = true); 4876 bool hasAnyAcceptableTemplateNames(LookupResult &R, 4877 bool AllowFunctionTemplates = true); 4878 4879 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4880 QualType ObjectType, bool EnteringContext, 4881 bool &MemberOfUnknownSpecialization); 4882 4883 TemplateNameKind isTemplateName(Scope *S, 4884 CXXScopeSpec &SS, 4885 bool hasTemplateKeyword, 4886 UnqualifiedId &Name, 4887 ParsedType ObjectType, 4888 bool EnteringContext, 4889 TemplateTy &Template, 4890 bool &MemberOfUnknownSpecialization); 4891 4892 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4893 SourceLocation IILoc, 4894 Scope *S, 4895 const CXXScopeSpec *SS, 4896 TemplateTy &SuggestedTemplate, 4897 TemplateNameKind &SuggestedKind); 4898 4899 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4900 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4901 4902 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4903 SourceLocation EllipsisLoc, 4904 SourceLocation KeyLoc, 4905 IdentifierInfo *ParamName, 4906 SourceLocation ParamNameLoc, 4907 unsigned Depth, unsigned Position, 4908 SourceLocation EqualLoc, 4909 ParsedType DefaultArg); 4910 4911 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4912 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4913 unsigned Depth, 4914 unsigned Position, 4915 SourceLocation EqualLoc, 4916 Expr *DefaultArg); 4917 Decl *ActOnTemplateTemplateParameter(Scope *S, 4918 SourceLocation TmpLoc, 4919 TemplateParameterList *Params, 4920 SourceLocation EllipsisLoc, 4921 IdentifierInfo *ParamName, 4922 SourceLocation ParamNameLoc, 4923 unsigned Depth, 4924 unsigned Position, 4925 SourceLocation EqualLoc, 4926 ParsedTemplateArgument DefaultArg); 4927 4928 TemplateParameterList * 4929 ActOnTemplateParameterList(unsigned Depth, 4930 SourceLocation ExportLoc, 4931 SourceLocation TemplateLoc, 4932 SourceLocation LAngleLoc, 4933 Decl **Params, unsigned NumParams, 4934 SourceLocation RAngleLoc); 4935 4936 /// \brief The context in which we are checking a template parameter 4937 /// list. 4938 enum TemplateParamListContext { 4939 TPC_ClassTemplate, 4940 TPC_FunctionTemplate, 4941 TPC_ClassTemplateMember, 4942 TPC_FriendFunctionTemplate, 4943 TPC_FriendFunctionTemplateDefinition, 4944 TPC_TypeAliasTemplate 4945 }; 4946 4947 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4948 TemplateParameterList *OldParams, 4949 TemplateParamListContext TPC); 4950 TemplateParameterList * 4951 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4952 SourceLocation DeclLoc, 4953 const CXXScopeSpec &SS, 4954 TemplateParameterList **ParamLists, 4955 unsigned NumParamLists, 4956 bool IsFriend, 4957 bool &IsExplicitSpecialization, 4958 bool &Invalid); 4959 4960 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4961 SourceLocation KWLoc, CXXScopeSpec &SS, 4962 IdentifierInfo *Name, SourceLocation NameLoc, 4963 AttributeList *Attr, 4964 TemplateParameterList *TemplateParams, 4965 AccessSpecifier AS, 4966 SourceLocation ModulePrivateLoc, 4967 unsigned NumOuterTemplateParamLists, 4968 TemplateParameterList **OuterTemplateParamLists); 4969 4970 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4971 TemplateArgumentListInfo &Out); 4972 4973 void NoteAllFoundTemplates(TemplateName Name); 4974 4975 QualType CheckTemplateIdType(TemplateName Template, 4976 SourceLocation TemplateLoc, 4977 TemplateArgumentListInfo &TemplateArgs); 4978 4979 TypeResult 4980 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4981 TemplateTy Template, SourceLocation TemplateLoc, 4982 SourceLocation LAngleLoc, 4983 ASTTemplateArgsPtr TemplateArgs, 4984 SourceLocation RAngleLoc, 4985 bool IsCtorOrDtorName = false); 4986 4987 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4988 /// such as \c class T::template apply<U>. 4989 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4990 TypeSpecifierType TagSpec, 4991 SourceLocation TagLoc, 4992 CXXScopeSpec &SS, 4993 SourceLocation TemplateKWLoc, 4994 TemplateTy TemplateD, 4995 SourceLocation TemplateLoc, 4996 SourceLocation LAngleLoc, 4997 ASTTemplateArgsPtr TemplateArgsIn, 4998 SourceLocation RAngleLoc); 4999 5000 5001 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 5002 SourceLocation TemplateKWLoc, 5003 LookupResult &R, 5004 bool RequiresADL, 5005 const TemplateArgumentListInfo *TemplateArgs); 5006 5007 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 5008 SourceLocation TemplateKWLoc, 5009 const DeclarationNameInfo &NameInfo, 5010 const TemplateArgumentListInfo *TemplateArgs); 5011 5012 TemplateNameKind ActOnDependentTemplateName(Scope *S, 5013 CXXScopeSpec &SS, 5014 SourceLocation TemplateKWLoc, 5015 UnqualifiedId &Name, 5016 ParsedType ObjectType, 5017 bool EnteringContext, 5018 TemplateTy &Template); 5019 5020 DeclResult 5021 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 5022 SourceLocation KWLoc, 5023 SourceLocation ModulePrivateLoc, 5024 CXXScopeSpec &SS, 5025 TemplateTy Template, 5026 SourceLocation TemplateNameLoc, 5027 SourceLocation LAngleLoc, 5028 ASTTemplateArgsPtr TemplateArgs, 5029 SourceLocation RAngleLoc, 5030 AttributeList *Attr, 5031 MultiTemplateParamsArg TemplateParameterLists); 5032 5033 Decl *ActOnTemplateDeclarator(Scope *S, 5034 MultiTemplateParamsArg TemplateParameterLists, 5035 Declarator &D); 5036 5037 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 5038 MultiTemplateParamsArg TemplateParameterLists, 5039 Declarator &D); 5040 5041 bool 5042 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 5043 TemplateSpecializationKind NewTSK, 5044 NamedDecl *PrevDecl, 5045 TemplateSpecializationKind PrevTSK, 5046 SourceLocation PrevPtOfInstantiation, 5047 bool &SuppressNew); 5048 5049 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 5050 const TemplateArgumentListInfo &ExplicitTemplateArgs, 5051 LookupResult &Previous); 5052 5053 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 5054 TemplateArgumentListInfo *ExplicitTemplateArgs, 5055 LookupResult &Previous); 5056 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 5057 5058 DeclResult 5059 ActOnExplicitInstantiation(Scope *S, 5060 SourceLocation ExternLoc, 5061 SourceLocation TemplateLoc, 5062 unsigned TagSpec, 5063 SourceLocation KWLoc, 5064 const CXXScopeSpec &SS, 5065 TemplateTy Template, 5066 SourceLocation TemplateNameLoc, 5067 SourceLocation LAngleLoc, 5068 ASTTemplateArgsPtr TemplateArgs, 5069 SourceLocation RAngleLoc, 5070 AttributeList *Attr); 5071 5072 DeclResult 5073 ActOnExplicitInstantiation(Scope *S, 5074 SourceLocation ExternLoc, 5075 SourceLocation TemplateLoc, 5076 unsigned TagSpec, 5077 SourceLocation KWLoc, 5078 CXXScopeSpec &SS, 5079 IdentifierInfo *Name, 5080 SourceLocation NameLoc, 5081 AttributeList *Attr); 5082 5083 DeclResult ActOnExplicitInstantiation(Scope *S, 5084 SourceLocation ExternLoc, 5085 SourceLocation TemplateLoc, 5086 Declarator &D); 5087 5088 TemplateArgumentLoc 5089 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 5090 SourceLocation TemplateLoc, 5091 SourceLocation RAngleLoc, 5092 Decl *Param, 5093 SmallVectorImpl<TemplateArgument> &Converted); 5094 5095 /// \brief Specifies the context in which a particular template 5096 /// argument is being checked. 5097 enum CheckTemplateArgumentKind { 5098 /// \brief The template argument was specified in the code or was 5099 /// instantiated with some deduced template arguments. 5100 CTAK_Specified, 5101 5102 /// \brief The template argument was deduced via template argument 5103 /// deduction. 5104 CTAK_Deduced, 5105 5106 /// \brief The template argument was deduced from an array bound 5107 /// via template argument deduction. 5108 CTAK_DeducedFromArrayBound 5109 }; 5110 5111 bool CheckTemplateArgument(NamedDecl *Param, 5112 const TemplateArgumentLoc &Arg, 5113 NamedDecl *Template, 5114 SourceLocation TemplateLoc, 5115 SourceLocation RAngleLoc, 5116 unsigned ArgumentPackIndex, 5117 SmallVectorImpl<TemplateArgument> &Converted, 5118 CheckTemplateArgumentKind CTAK = CTAK_Specified); 5119 5120 /// \brief Check that the given template arguments can be be provided to 5121 /// the given template, converting the arguments along the way. 5122 /// 5123 /// \param Template The template to which the template arguments are being 5124 /// provided. 5125 /// 5126 /// \param TemplateLoc The location of the template name in the source. 5127 /// 5128 /// \param TemplateArgs The list of template arguments. If the template is 5129 /// a template template parameter, this function may extend the set of 5130 /// template arguments to also include substituted, defaulted template 5131 /// arguments. 5132 /// 5133 /// \param PartialTemplateArgs True if the list of template arguments is 5134 /// intentionally partial, e.g., because we're checking just the initial 5135 /// set of template arguments. 5136 /// 5137 /// \param Converted Will receive the converted, canonicalized template 5138 /// arguments. 5139 /// 5140 /// 5141 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 5142 /// when the template arguments contain a pack expansion that is being 5143 /// expanded into a fixed parameter list. 5144 /// 5145 /// \returns True if an error occurred, false otherwise. 5146 bool CheckTemplateArgumentList(TemplateDecl *Template, 5147 SourceLocation TemplateLoc, 5148 TemplateArgumentListInfo &TemplateArgs, 5149 bool PartialTemplateArgs, 5150 SmallVectorImpl<TemplateArgument> &Converted, 5151 bool *ExpansionIntoFixedList = 0); 5152 5153 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 5154 const TemplateArgumentLoc &Arg, 5155 SmallVectorImpl<TemplateArgument> &Converted); 5156 5157 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 5158 TypeSourceInfo *Arg); 5159 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 5160 QualType InstantiatedParamType, Expr *Arg, 5161 TemplateArgument &Converted, 5162 CheckTemplateArgumentKind CTAK = CTAK_Specified); 5163 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 5164 const TemplateArgumentLoc &Arg, 5165 unsigned ArgumentPackIndex); 5166 5167 ExprResult 5168 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 5169 QualType ParamType, 5170 SourceLocation Loc); 5171 ExprResult 5172 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 5173 SourceLocation Loc); 5174 5175 /// \brief Enumeration describing how template parameter lists are compared 5176 /// for equality. 5177 enum TemplateParameterListEqualKind { 5178 /// \brief We are matching the template parameter lists of two templates 5179 /// that might be redeclarations. 5180 /// 5181 /// \code 5182 /// template<typename T> struct X; 5183 /// template<typename T> struct X; 5184 /// \endcode 5185 TPL_TemplateMatch, 5186 5187 /// \brief We are matching the template parameter lists of two template 5188 /// template parameters as part of matching the template parameter lists 5189 /// of two templates that might be redeclarations. 5190 /// 5191 /// \code 5192 /// template<template<int I> class TT> struct X; 5193 /// template<template<int Value> class Other> struct X; 5194 /// \endcode 5195 TPL_TemplateTemplateParmMatch, 5196 5197 /// \brief We are matching the template parameter lists of a template 5198 /// template argument against the template parameter lists of a template 5199 /// template parameter. 5200 /// 5201 /// \code 5202 /// template<template<int Value> class Metafun> struct X; 5203 /// template<int Value> struct integer_c; 5204 /// X<integer_c> xic; 5205 /// \endcode 5206 TPL_TemplateTemplateArgumentMatch 5207 }; 5208 5209 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 5210 TemplateParameterList *Old, 5211 bool Complain, 5212 TemplateParameterListEqualKind Kind, 5213 SourceLocation TemplateArgLoc 5214 = SourceLocation()); 5215 5216 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 5217 5218 /// \brief Called when the parser has parsed a C++ typename 5219 /// specifier, e.g., "typename T::type". 5220 /// 5221 /// \param S The scope in which this typename type occurs. 5222 /// \param TypenameLoc the location of the 'typename' keyword 5223 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 5224 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 5225 /// \param IdLoc the location of the identifier. 5226 TypeResult 5227 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 5228 const CXXScopeSpec &SS, const IdentifierInfo &II, 5229 SourceLocation IdLoc); 5230 5231 /// \brief Called when the parser has parsed a C++ typename 5232 /// specifier that ends in a template-id, e.g., 5233 /// "typename MetaFun::template apply<T1, T2>". 5234 /// 5235 /// \param S The scope in which this typename type occurs. 5236 /// \param TypenameLoc the location of the 'typename' keyword 5237 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 5238 /// \param TemplateLoc the location of the 'template' keyword, if any. 5239 /// \param TemplateName The template name. 5240 /// \param TemplateNameLoc The location of the template name. 5241 /// \param LAngleLoc The location of the opening angle bracket ('<'). 5242 /// \param TemplateArgs The template arguments. 5243 /// \param RAngleLoc The location of the closing angle bracket ('>'). 5244 TypeResult 5245 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 5246 const CXXScopeSpec &SS, 5247 SourceLocation TemplateLoc, 5248 TemplateTy TemplateName, 5249 SourceLocation TemplateNameLoc, 5250 SourceLocation LAngleLoc, 5251 ASTTemplateArgsPtr TemplateArgs, 5252 SourceLocation RAngleLoc); 5253 5254 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 5255 SourceLocation KeywordLoc, 5256 NestedNameSpecifierLoc QualifierLoc, 5257 const IdentifierInfo &II, 5258 SourceLocation IILoc); 5259 5260 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 5261 SourceLocation Loc, 5262 DeclarationName Name); 5263 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 5264 5265 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 5266 bool RebuildTemplateParamsInCurrentInstantiation( 5267 TemplateParameterList *Params); 5268 5269 std::string 5270 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 5271 const TemplateArgumentList &Args); 5272 5273 std::string 5274 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 5275 const TemplateArgument *Args, 5276 unsigned NumArgs); 5277 5278 //===--------------------------------------------------------------------===// 5279 // C++ Variadic Templates (C++0x [temp.variadic]) 5280 //===--------------------------------------------------------------------===// 5281 5282 /// \brief The context in which an unexpanded parameter pack is 5283 /// being diagnosed. 5284 /// 5285 /// Note that the values of this enumeration line up with the first 5286 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 5287 enum UnexpandedParameterPackContext { 5288 /// \brief An arbitrary expression. 5289 UPPC_Expression = 0, 5290 5291 /// \brief The base type of a class type. 5292 UPPC_BaseType, 5293 5294 /// \brief The type of an arbitrary declaration. 5295 UPPC_DeclarationType, 5296 5297 /// \brief The type of a data member. 5298 UPPC_DataMemberType, 5299 5300 /// \brief The size of a bit-field. 5301 UPPC_BitFieldWidth, 5302 5303 /// \brief The expression in a static assertion. 5304 UPPC_StaticAssertExpression, 5305 5306 /// \brief The fixed underlying type of an enumeration. 5307 UPPC_FixedUnderlyingType, 5308 5309 /// \brief The enumerator value. 5310 UPPC_EnumeratorValue, 5311 5312 /// \brief A using declaration. 5313 UPPC_UsingDeclaration, 5314 5315 /// \brief A friend declaration. 5316 UPPC_FriendDeclaration, 5317 5318 /// \brief A declaration qualifier. 5319 UPPC_DeclarationQualifier, 5320 5321 /// \brief An initializer. 5322 UPPC_Initializer, 5323 5324 /// \brief A default argument. 5325 UPPC_DefaultArgument, 5326 5327 /// \brief The type of a non-type template parameter. 5328 UPPC_NonTypeTemplateParameterType, 5329 5330 /// \brief The type of an exception. 5331 UPPC_ExceptionType, 5332 5333 /// \brief Partial specialization. 5334 UPPC_PartialSpecialization, 5335 5336 /// \brief Microsoft __if_exists. 5337 UPPC_IfExists, 5338 5339 /// \brief Microsoft __if_not_exists. 5340 UPPC_IfNotExists, 5341 5342 /// \brief Lambda expression. 5343 UPPC_Lambda, 5344 5345 /// \brief Block expression, 5346 UPPC_Block 5347}; 5348 5349 /// \brief Diagnose unexpanded parameter packs. 5350 /// 5351 /// \param Loc The location at which we should emit the diagnostic. 5352 /// 5353 /// \param UPPC The context in which we are diagnosing unexpanded 5354 /// parameter packs. 5355 /// 5356 /// \param Unexpanded the set of unexpanded parameter packs. 5357 /// 5358 /// \returns true if an error occurred, false otherwise. 5359 bool DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 5360 UnexpandedParameterPackContext UPPC, 5361 ArrayRef<UnexpandedParameterPack> Unexpanded); 5362 5363 /// \brief If the given type contains an unexpanded parameter pack, 5364 /// diagnose the error. 5365 /// 5366 /// \param Loc The source location where a diagnostc should be emitted. 5367 /// 5368 /// \param T The type that is being checked for unexpanded parameter 5369 /// packs. 5370 /// 5371 /// \returns true if an error occurred, false otherwise. 5372 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 5373 UnexpandedParameterPackContext UPPC); 5374 5375 /// \brief If the given expression contains an unexpanded parameter 5376 /// pack, diagnose the error. 5377 /// 5378 /// \param E The expression that is being checked for unexpanded 5379 /// parameter packs. 5380 /// 5381 /// \returns true if an error occurred, false otherwise. 5382 bool DiagnoseUnexpandedParameterPack(Expr *E, 5383 UnexpandedParameterPackContext UPPC = UPPC_Expression); 5384 5385 /// \brief If the given nested-name-specifier contains an unexpanded 5386 /// parameter pack, diagnose the error. 5387 /// 5388 /// \param SS The nested-name-specifier that is being checked for 5389 /// unexpanded parameter packs. 5390 /// 5391 /// \returns true if an error occurred, false otherwise. 5392 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 5393 UnexpandedParameterPackContext UPPC); 5394 5395 /// \brief If the given name contains an unexpanded parameter pack, 5396 /// diagnose the error. 5397 /// 5398 /// \param NameInfo The name (with source location information) that 5399 /// is being checked for unexpanded parameter packs. 5400 /// 5401 /// \returns true if an error occurred, false otherwise. 5402 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 5403 UnexpandedParameterPackContext UPPC); 5404 5405 /// \brief If the given template name contains an unexpanded parameter pack, 5406 /// diagnose the error. 5407 /// 5408 /// \param Loc The location of the template name. 5409 /// 5410 /// \param Template The template name that is being checked for unexpanded 5411 /// parameter packs. 5412 /// 5413 /// \returns true if an error occurred, false otherwise. 5414 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 5415 TemplateName Template, 5416 UnexpandedParameterPackContext UPPC); 5417 5418 /// \brief If the given template argument contains an unexpanded parameter 5419 /// pack, diagnose the error. 5420 /// 5421 /// \param Arg The template argument that is being checked for unexpanded 5422 /// parameter packs. 5423 /// 5424 /// \returns true if an error occurred, false otherwise. 5425 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 5426 UnexpandedParameterPackContext UPPC); 5427 5428 /// \brief Collect the set of unexpanded parameter packs within the given 5429 /// template argument. 5430 /// 5431 /// \param Arg The template argument that will be traversed to find 5432 /// unexpanded parameter packs. 5433 void collectUnexpandedParameterPacks(TemplateArgument Arg, 5434 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5435 5436 /// \brief Collect the set of unexpanded parameter packs within the given 5437 /// template argument. 5438 /// 5439 /// \param Arg The template argument that will be traversed to find 5440 /// unexpanded parameter packs. 5441 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 5442 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5443 5444 /// \brief Collect the set of unexpanded parameter packs within the given 5445 /// type. 5446 /// 5447 /// \param T The type that will be traversed to find 5448 /// unexpanded parameter packs. 5449 void collectUnexpandedParameterPacks(QualType T, 5450 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5451 5452 /// \brief Collect the set of unexpanded parameter packs within the given 5453 /// type. 5454 /// 5455 /// \param TL The type that will be traversed to find 5456 /// unexpanded parameter packs. 5457 void collectUnexpandedParameterPacks(TypeLoc TL, 5458 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5459 5460 /// \brief Collect the set of unexpanded parameter packs within the given 5461 /// nested-name-specifier. 5462 /// 5463 /// \param SS The nested-name-specifier that will be traversed to find 5464 /// unexpanded parameter packs. 5465 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 5466 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5467 5468 /// \brief Collect the set of unexpanded parameter packs within the given 5469 /// name. 5470 /// 5471 /// \param NameInfo The name that will be traversed to find 5472 /// unexpanded parameter packs. 5473 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 5474 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5475 5476 /// \brief Invoked when parsing a template argument followed by an 5477 /// ellipsis, which creates a pack expansion. 5478 /// 5479 /// \param Arg The template argument preceding the ellipsis, which 5480 /// may already be invalid. 5481 /// 5482 /// \param EllipsisLoc The location of the ellipsis. 5483 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 5484 SourceLocation EllipsisLoc); 5485 5486 /// \brief Invoked when parsing a type followed by an ellipsis, which 5487 /// creates a pack expansion. 5488 /// 5489 /// \param Type The type preceding the ellipsis, which will become 5490 /// the pattern of the pack expansion. 5491 /// 5492 /// \param EllipsisLoc The location of the ellipsis. 5493 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 5494 5495 /// \brief Construct a pack expansion type from the pattern of the pack 5496 /// expansion. 5497 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 5498 SourceLocation EllipsisLoc, 5499 Optional<unsigned> NumExpansions); 5500 5501 /// \brief Construct a pack expansion type from the pattern of the pack 5502 /// expansion. 5503 QualType CheckPackExpansion(QualType Pattern, 5504 SourceRange PatternRange, 5505 SourceLocation EllipsisLoc, 5506 Optional<unsigned> NumExpansions); 5507 5508 /// \brief Invoked when parsing an expression followed by an ellipsis, which 5509 /// creates a pack expansion. 5510 /// 5511 /// \param Pattern The expression preceding the ellipsis, which will become 5512 /// the pattern of the pack expansion. 5513 /// 5514 /// \param EllipsisLoc The location of the ellipsis. 5515 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 5516 5517 /// \brief Invoked when parsing an expression followed by an ellipsis, which 5518 /// creates a pack expansion. 5519 /// 5520 /// \param Pattern The expression preceding the ellipsis, which will become 5521 /// the pattern of the pack expansion. 5522 /// 5523 /// \param EllipsisLoc The location of the ellipsis. 5524 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 5525 Optional<unsigned> NumExpansions); 5526 5527 /// \brief Determine whether we could expand a pack expansion with the 5528 /// given set of parameter packs into separate arguments by repeatedly 5529 /// transforming the pattern. 5530 /// 5531 /// \param EllipsisLoc The location of the ellipsis that identifies the 5532 /// pack expansion. 5533 /// 5534 /// \param PatternRange The source range that covers the entire pattern of 5535 /// the pack expansion. 5536 /// 5537 /// \param Unexpanded The set of unexpanded parameter packs within the 5538 /// pattern. 5539 /// 5540 /// \param ShouldExpand Will be set to \c true if the transformer should 5541 /// expand the corresponding pack expansions into separate arguments. When 5542 /// set, \c NumExpansions must also be set. 5543 /// 5544 /// \param RetainExpansion Whether the caller should add an unexpanded 5545 /// pack expansion after all of the expanded arguments. This is used 5546 /// when extending explicitly-specified template argument packs per 5547 /// C++0x [temp.arg.explicit]p9. 5548 /// 5549 /// \param NumExpansions The number of separate arguments that will be in 5550 /// the expanded form of the corresponding pack expansion. This is both an 5551 /// input and an output parameter, which can be set by the caller if the 5552 /// number of expansions is known a priori (e.g., due to a prior substitution) 5553 /// and will be set by the callee when the number of expansions is known. 5554 /// The callee must set this value when \c ShouldExpand is \c true; it may 5555 /// set this value in other cases. 5556 /// 5557 /// \returns true if an error occurred (e.g., because the parameter packs 5558 /// are to be instantiated with arguments of different lengths), false 5559 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 5560 /// must be set. 5561 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 5562 SourceRange PatternRange, 5563 ArrayRef<UnexpandedParameterPack> Unexpanded, 5564 const MultiLevelTemplateArgumentList &TemplateArgs, 5565 bool &ShouldExpand, 5566 bool &RetainExpansion, 5567 Optional<unsigned> &NumExpansions); 5568 5569 /// \brief Determine the number of arguments in the given pack expansion 5570 /// type. 5571 /// 5572 /// This routine assumes that the number of arguments in the expansion is 5573 /// consistent across all of the unexpanded parameter packs in its pattern. 5574 /// 5575 /// Returns an empty Optional if the type can't be expanded. 5576 Optional<unsigned> getNumArgumentsInExpansion(QualType T, 5577 const MultiLevelTemplateArgumentList &TemplateArgs); 5578 5579 /// \brief Determine whether the given declarator contains any unexpanded 5580 /// parameter packs. 5581 /// 5582 /// This routine is used by the parser to disambiguate function declarators 5583 /// with an ellipsis prior to the ')', e.g., 5584 /// 5585 /// \code 5586 /// void f(T...); 5587 /// \endcode 5588 /// 5589 /// To determine whether we have an (unnamed) function parameter pack or 5590 /// a variadic function. 5591 /// 5592 /// \returns true if the declarator contains any unexpanded parameter packs, 5593 /// false otherwise. 5594 bool containsUnexpandedParameterPacks(Declarator &D); 5595 5596 //===--------------------------------------------------------------------===// 5597 // C++ Template Argument Deduction (C++ [temp.deduct]) 5598 //===--------------------------------------------------------------------===// 5599 5600 /// \brief Describes the result of template argument deduction. 5601 /// 5602 /// The TemplateDeductionResult enumeration describes the result of 5603 /// template argument deduction, as returned from 5604 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 5605 /// structure provides additional information about the results of 5606 /// template argument deduction, e.g., the deduced template argument 5607 /// list (if successful) or the specific template parameters or 5608 /// deduced arguments that were involved in the failure. 5609 enum TemplateDeductionResult { 5610 /// \brief Template argument deduction was successful. 5611 TDK_Success = 0, 5612 /// \brief The declaration was invalid; do nothing. 5613 TDK_Invalid, 5614 /// \brief Template argument deduction exceeded the maximum template 5615 /// instantiation depth (which has already been diagnosed). 5616 TDK_InstantiationDepth, 5617 /// \brief Template argument deduction did not deduce a value 5618 /// for every template parameter. 5619 TDK_Incomplete, 5620 /// \brief Template argument deduction produced inconsistent 5621 /// deduced values for the given template parameter. 5622 TDK_Inconsistent, 5623 /// \brief Template argument deduction failed due to inconsistent 5624 /// cv-qualifiers on a template parameter type that would 5625 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 5626 /// but were given a non-const "X". 5627 TDK_Underqualified, 5628 /// \brief Substitution of the deduced template argument values 5629 /// resulted in an error. 5630 TDK_SubstitutionFailure, 5631 /// \brief A non-depnedent component of the parameter did not match the 5632 /// corresponding component of the argument. 5633 TDK_NonDeducedMismatch, 5634 /// \brief When performing template argument deduction for a function 5635 /// template, there were too many call arguments. 5636 TDK_TooManyArguments, 5637 /// \brief When performing template argument deduction for a function 5638 /// template, there were too few call arguments. 5639 TDK_TooFewArguments, 5640 /// \brief The explicitly-specified template arguments were not valid 5641 /// template arguments for the given template. 5642 TDK_InvalidExplicitArguments, 5643 /// \brief The arguments included an overloaded function name that could 5644 /// not be resolved to a suitable function. 5645 TDK_FailedOverloadResolution, 5646 /// \brief Deduction failed; that's all we know. 5647 TDK_MiscellaneousDeductionFailure 5648 }; 5649 5650 TemplateDeductionResult 5651 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 5652 const TemplateArgumentList &TemplateArgs, 5653 sema::TemplateDeductionInfo &Info); 5654 5655 TemplateDeductionResult 5656 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5657 TemplateArgumentListInfo &ExplicitTemplateArgs, 5658 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5659 SmallVectorImpl<QualType> &ParamTypes, 5660 QualType *FunctionType, 5661 sema::TemplateDeductionInfo &Info); 5662 5663 /// brief A function argument from which we performed template argument 5664 // deduction for a call. 5665 struct OriginalCallArg { 5666 OriginalCallArg(QualType OriginalParamType, 5667 unsigned ArgIdx, 5668 QualType OriginalArgType) 5669 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 5670 OriginalArgType(OriginalArgType) { } 5671 5672 QualType OriginalParamType; 5673 unsigned ArgIdx; 5674 QualType OriginalArgType; 5675 }; 5676 5677 TemplateDeductionResult 5678 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 5679 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5680 unsigned NumExplicitlySpecified, 5681 FunctionDecl *&Specialization, 5682 sema::TemplateDeductionInfo &Info, 5683 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 5684 5685 TemplateDeductionResult 5686 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5687 TemplateArgumentListInfo *ExplicitTemplateArgs, 5688 ArrayRef<Expr *> Args, 5689 FunctionDecl *&Specialization, 5690 sema::TemplateDeductionInfo &Info); 5691 5692 TemplateDeductionResult 5693 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5694 TemplateArgumentListInfo *ExplicitTemplateArgs, 5695 QualType ArgFunctionType, 5696 FunctionDecl *&Specialization, 5697 sema::TemplateDeductionInfo &Info, 5698 bool InOverloadResolution = false); 5699 5700 TemplateDeductionResult 5701 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5702 QualType ToType, 5703 CXXConversionDecl *&Specialization, 5704 sema::TemplateDeductionInfo &Info); 5705 5706 TemplateDeductionResult 5707 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5708 TemplateArgumentListInfo *ExplicitTemplateArgs, 5709 FunctionDecl *&Specialization, 5710 sema::TemplateDeductionInfo &Info, 5711 bool InOverloadResolution = false); 5712 5713 /// \brief Result type of DeduceAutoType. 5714 enum DeduceAutoResult { 5715 DAR_Succeeded, 5716 DAR_Failed, 5717 DAR_FailedAlreadyDiagnosed 5718 }; 5719 5720 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 5721 QualType &Result); 5722 DeduceAutoResult DeduceAutoType(TypeLoc AutoTypeLoc, Expr *&Initializer, 5723 QualType &Result); 5724 QualType SubstAutoType(QualType TypeWithAuto, QualType Replacement); 5725 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 5726 bool DeduceReturnType(FunctionDecl *FD, SourceLocation Loc, 5727 bool Diagnose = true); 5728 5729 bool DeduceFunctionTypeFromReturnExpr(FunctionDecl *FD, 5730 SourceLocation ReturnLoc, 5731 Expr *&RetExpr, AutoType *AT); 5732 5733 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 5734 FunctionTemplateDecl *FT2, 5735 SourceLocation Loc, 5736 TemplatePartialOrderingContext TPOC, 5737 unsigned NumCallArguments); 5738 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 5739 UnresolvedSetIterator SEnd, 5740 TemplatePartialOrderingContext TPOC, 5741 unsigned NumCallArguments, 5742 SourceLocation Loc, 5743 const PartialDiagnostic &NoneDiag, 5744 const PartialDiagnostic &AmbigDiag, 5745 const PartialDiagnostic &CandidateDiag, 5746 bool Complain = true, 5747 QualType TargetType = QualType()); 5748 5749 ClassTemplatePartialSpecializationDecl * 5750 getMoreSpecializedPartialSpecialization( 5751 ClassTemplatePartialSpecializationDecl *PS1, 5752 ClassTemplatePartialSpecializationDecl *PS2, 5753 SourceLocation Loc); 5754 5755 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 5756 bool OnlyDeduced, 5757 unsigned Depth, 5758 llvm::SmallBitVector &Used); 5759 void MarkDeducedTemplateParameters( 5760 const FunctionTemplateDecl *FunctionTemplate, 5761 llvm::SmallBitVector &Deduced) { 5762 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 5763 } 5764 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 5765 const FunctionTemplateDecl *FunctionTemplate, 5766 llvm::SmallBitVector &Deduced); 5767 5768 //===--------------------------------------------------------------------===// 5769 // C++ Template Instantiation 5770 // 5771 5772 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 5773 const TemplateArgumentList *Innermost = 0, 5774 bool RelativeToPrimary = false, 5775 const FunctionDecl *Pattern = 0); 5776 5777 /// \brief A template instantiation that is currently in progress. 5778 struct ActiveTemplateInstantiation { 5779 /// \brief The kind of template instantiation we are performing 5780 enum InstantiationKind { 5781 /// We are instantiating a template declaration. The entity is 5782 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5783 TemplateInstantiation, 5784 5785 /// We are instantiating a default argument for a template 5786 /// parameter. The Entity is the template, and 5787 /// TemplateArgs/NumTemplateArguments provides the template 5788 /// arguments as specified. 5789 /// FIXME: Use a TemplateArgumentList 5790 DefaultTemplateArgumentInstantiation, 5791 5792 /// We are instantiating a default argument for a function. 5793 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5794 /// provides the template arguments as specified. 5795 DefaultFunctionArgumentInstantiation, 5796 5797 /// We are substituting explicit template arguments provided for 5798 /// a function template. The entity is a FunctionTemplateDecl. 5799 ExplicitTemplateArgumentSubstitution, 5800 5801 /// We are substituting template argument determined as part of 5802 /// template argument deduction for either a class template 5803 /// partial specialization or a function template. The 5804 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5805 /// a FunctionTemplateDecl. 5806 DeducedTemplateArgumentSubstitution, 5807 5808 /// We are substituting prior template arguments into a new 5809 /// template parameter. The template parameter itself is either a 5810 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5811 PriorTemplateArgumentSubstitution, 5812 5813 /// We are checking the validity of a default template argument that 5814 /// has been used when naming a template-id. 5815 DefaultTemplateArgumentChecking, 5816 5817 /// We are instantiating the exception specification for a function 5818 /// template which was deferred until it was needed. 5819 ExceptionSpecInstantiation 5820 } Kind; 5821 5822 /// \brief The point of instantiation within the source code. 5823 SourceLocation PointOfInstantiation; 5824 5825 /// \brief The template (or partial specialization) in which we are 5826 /// performing the instantiation, for substitutions of prior template 5827 /// arguments. 5828 NamedDecl *Template; 5829 5830 /// \brief The entity that is being instantiated. 5831 Decl *Entity; 5832 5833 /// \brief The list of template arguments we are substituting, if they 5834 /// are not part of the entity. 5835 const TemplateArgument *TemplateArgs; 5836 5837 /// \brief The number of template arguments in TemplateArgs. 5838 unsigned NumTemplateArgs; 5839 5840 /// \brief The template deduction info object associated with the 5841 /// substitution or checking of explicit or deduced template arguments. 5842 sema::TemplateDeductionInfo *DeductionInfo; 5843 5844 /// \brief The source range that covers the construct that cause 5845 /// the instantiation, e.g., the template-id that causes a class 5846 /// template instantiation. 5847 SourceRange InstantiationRange; 5848 5849 ActiveTemplateInstantiation() 5850 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5851 NumTemplateArgs(0), DeductionInfo(0) {} 5852 5853 /// \brief Determines whether this template is an actual instantiation 5854 /// that should be counted toward the maximum instantiation depth. 5855 bool isInstantiationRecord() const; 5856 5857 friend bool operator==(const ActiveTemplateInstantiation &X, 5858 const ActiveTemplateInstantiation &Y) { 5859 if (X.Kind != Y.Kind) 5860 return false; 5861 5862 if (X.Entity != Y.Entity) 5863 return false; 5864 5865 switch (X.Kind) { 5866 case TemplateInstantiation: 5867 case ExceptionSpecInstantiation: 5868 return true; 5869 5870 case PriorTemplateArgumentSubstitution: 5871 case DefaultTemplateArgumentChecking: 5872 return X.Template == Y.Template && X.TemplateArgs == Y.TemplateArgs; 5873 5874 case DefaultTemplateArgumentInstantiation: 5875 case ExplicitTemplateArgumentSubstitution: 5876 case DeducedTemplateArgumentSubstitution: 5877 case DefaultFunctionArgumentInstantiation: 5878 return X.TemplateArgs == Y.TemplateArgs; 5879 5880 } 5881 5882 llvm_unreachable("Invalid InstantiationKind!"); 5883 } 5884 5885 friend bool operator!=(const ActiveTemplateInstantiation &X, 5886 const ActiveTemplateInstantiation &Y) { 5887 return !(X == Y); 5888 } 5889 }; 5890 5891 /// \brief List of active template instantiations. 5892 /// 5893 /// This vector is treated as a stack. As one template instantiation 5894 /// requires another template instantiation, additional 5895 /// instantiations are pushed onto the stack up to a 5896 /// user-configurable limit LangOptions::InstantiationDepth. 5897 SmallVector<ActiveTemplateInstantiation, 16> 5898 ActiveTemplateInstantiations; 5899 5900 /// \brief Whether we are in a SFINAE context that is not associated with 5901 /// template instantiation. 5902 /// 5903 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5904 /// of a template instantiation or template argument deduction. 5905 bool InNonInstantiationSFINAEContext; 5906 5907 /// \brief The number of ActiveTemplateInstantiation entries in 5908 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5909 /// therefore, should not be counted as part of the instantiation depth. 5910 unsigned NonInstantiationEntries; 5911 5912 /// \brief The last template from which a template instantiation 5913 /// error or warning was produced. 5914 /// 5915 /// This value is used to suppress printing of redundant template 5916 /// instantiation backtraces when there are multiple errors in the 5917 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5918 /// to implement it anywhere else. 5919 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5920 5921 /// \brief The current index into pack expansion arguments that will be 5922 /// used for substitution of parameter packs. 5923 /// 5924 /// The pack expansion index will be -1 to indicate that parameter packs 5925 /// should be instantiated as themselves. Otherwise, the index specifies 5926 /// which argument within the parameter pack will be used for substitution. 5927 int ArgumentPackSubstitutionIndex; 5928 5929 /// \brief RAII object used to change the argument pack substitution index 5930 /// within a \c Sema object. 5931 /// 5932 /// See \c ArgumentPackSubstitutionIndex for more information. 5933 class ArgumentPackSubstitutionIndexRAII { 5934 Sema &Self; 5935 int OldSubstitutionIndex; 5936 5937 public: 5938 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5939 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5940 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5941 } 5942 5943 ~ArgumentPackSubstitutionIndexRAII() { 5944 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5945 } 5946 }; 5947 5948 friend class ArgumentPackSubstitutionRAII; 5949 5950 /// \brief The stack of calls expression undergoing template instantiation. 5951 /// 5952 /// The top of this stack is used by a fixit instantiating unresolved 5953 /// function calls to fix the AST to match the textual change it prints. 5954 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5955 5956 /// \brief For each declaration that involved template argument deduction, the 5957 /// set of diagnostics that were suppressed during that template argument 5958 /// deduction. 5959 /// 5960 /// FIXME: Serialize this structure to the AST file. 5961 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5962 SuppressedDiagnostics; 5963 5964 /// \brief A stack object to be created when performing template 5965 /// instantiation. 5966 /// 5967 /// Construction of an object of type \c InstantiatingTemplate 5968 /// pushes the current instantiation onto the stack of active 5969 /// instantiations. If the size of this stack exceeds the maximum 5970 /// number of recursive template instantiations, construction 5971 /// produces an error and evaluates true. 5972 /// 5973 /// Destruction of this object will pop the named instantiation off 5974 /// the stack. 5975 struct InstantiatingTemplate { 5976 /// \brief Note that we are instantiating a class template, 5977 /// function template, or a member thereof. 5978 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5979 Decl *Entity, 5980 SourceRange InstantiationRange = SourceRange()); 5981 5982 struct ExceptionSpecification {}; 5983 /// \brief Note that we are instantiating an exception specification 5984 /// of a function template. 5985 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5986 FunctionDecl *Entity, ExceptionSpecification, 5987 SourceRange InstantiationRange = SourceRange()); 5988 5989 /// \brief Note that we are instantiating a default argument in a 5990 /// template-id. 5991 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5992 TemplateDecl *Template, 5993 ArrayRef<TemplateArgument> TemplateArgs, 5994 SourceRange InstantiationRange = SourceRange()); 5995 5996 /// \brief Note that we are instantiating a default argument in a 5997 /// template-id. 5998 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5999 FunctionTemplateDecl *FunctionTemplate, 6000 ArrayRef<TemplateArgument> TemplateArgs, 6001 ActiveTemplateInstantiation::InstantiationKind Kind, 6002 sema::TemplateDeductionInfo &DeductionInfo, 6003 SourceRange InstantiationRange = SourceRange()); 6004 6005 /// \brief Note that we are instantiating as part of template 6006 /// argument deduction for a class template partial 6007 /// specialization. 6008 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 6009 ClassTemplatePartialSpecializationDecl *PartialSpec, 6010 ArrayRef<TemplateArgument> TemplateArgs, 6011 sema::TemplateDeductionInfo &DeductionInfo, 6012 SourceRange InstantiationRange = SourceRange()); 6013 6014 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 6015 ParmVarDecl *Param, 6016 ArrayRef<TemplateArgument> TemplateArgs, 6017 SourceRange InstantiationRange = SourceRange()); 6018 6019 /// \brief Note that we are substituting prior template arguments into a 6020 /// non-type or template template parameter. 6021 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 6022 NamedDecl *Template, 6023 NonTypeTemplateParmDecl *Param, 6024 ArrayRef<TemplateArgument> TemplateArgs, 6025 SourceRange InstantiationRange); 6026 6027 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 6028 NamedDecl *Template, 6029 TemplateTemplateParmDecl *Param, 6030 ArrayRef<TemplateArgument> TemplateArgs, 6031 SourceRange InstantiationRange); 6032 6033 /// \brief Note that we are checking the default template argument 6034 /// against the template parameter for a given template-id. 6035 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 6036 TemplateDecl *Template, 6037 NamedDecl *Param, 6038 ArrayRef<TemplateArgument> TemplateArgs, 6039 SourceRange InstantiationRange); 6040 6041 6042 /// \brief Note that we have finished instantiating this template. 6043 void Clear(); 6044 6045 ~InstantiatingTemplate() { Clear(); } 6046 6047 /// \brief Determines whether we have exceeded the maximum 6048 /// recursive template instantiations. 6049 LLVM_EXPLICIT operator bool() const { return Invalid; } 6050 6051 private: 6052 Sema &SemaRef; 6053 bool Invalid; 6054 bool SavedInNonInstantiationSFINAEContext; 6055 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 6056 SourceRange InstantiationRange); 6057 6058 InstantiatingTemplate(const InstantiatingTemplate&) LLVM_DELETED_FUNCTION; 6059 6060 InstantiatingTemplate& 6061 operator=(const InstantiatingTemplate&) LLVM_DELETED_FUNCTION; 6062 }; 6063 6064 void PrintInstantiationStack(); 6065 6066 /// \brief Determines whether we are currently in a context where 6067 /// template argument substitution failures are not considered 6068 /// errors. 6069 /// 6070 /// \returns An empty \c Optional if we're not in a SFINAE context. 6071 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 6072 /// template-deduction context object, which can be used to capture 6073 /// diagnostics that will be suppressed. 6074 Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 6075 6076 /// \brief Determines whether we are currently in a context that 6077 /// is not evaluated as per C++ [expr] p5. 6078 bool isUnevaluatedContext() const { 6079 assert(!ExprEvalContexts.empty() && 6080 "Must be in an expression evaluation context"); 6081 return ExprEvalContexts.back().isUnevaluated(); 6082 } 6083 6084 /// \brief RAII class used to determine whether SFINAE has 6085 /// trapped any errors that occur during template argument 6086 /// deduction.` 6087 class SFINAETrap { 6088 Sema &SemaRef; 6089 unsigned PrevSFINAEErrors; 6090 bool PrevInNonInstantiationSFINAEContext; 6091 bool PrevAccessCheckingSFINAE; 6092 6093 public: 6094 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 6095 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 6096 PrevInNonInstantiationSFINAEContext( 6097 SemaRef.InNonInstantiationSFINAEContext), 6098 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 6099 { 6100 if (!SemaRef.isSFINAEContext()) 6101 SemaRef.InNonInstantiationSFINAEContext = true; 6102 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 6103 } 6104 6105 ~SFINAETrap() { 6106 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 6107 SemaRef.InNonInstantiationSFINAEContext 6108 = PrevInNonInstantiationSFINAEContext; 6109 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 6110 } 6111 6112 /// \brief Determine whether any SFINAE errors have been trapped. 6113 bool hasErrorOccurred() const { 6114 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 6115 } 6116 }; 6117 6118 /// \brief The current instantiation scope used to store local 6119 /// variables. 6120 LocalInstantiationScope *CurrentInstantiationScope; 6121 6122 /// \brief The number of typos corrected by CorrectTypo. 6123 unsigned TyposCorrected; 6124 6125 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 6126 UnqualifiedTyposCorrectedMap; 6127 6128 /// \brief A cache containing the results of typo correction for unqualified 6129 /// name lookup. 6130 /// 6131 /// The string is the string that we corrected to (which may be empty, if 6132 /// there was no correction), while the boolean will be true when the 6133 /// string represents a keyword. 6134 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 6135 6136 /// \brief Worker object for performing CFG-based warnings. 6137 sema::AnalysisBasedWarnings AnalysisWarnings; 6138 6139 /// \brief An entity for which implicit template instantiation is required. 6140 /// 6141 /// The source location associated with the declaration is the first place in 6142 /// the source code where the declaration was "used". It is not necessarily 6143 /// the point of instantiation (which will be either before or after the 6144 /// namespace-scope declaration that triggered this implicit instantiation), 6145 /// However, it is the location that diagnostics should generally refer to, 6146 /// because users will need to know what code triggered the instantiation. 6147 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 6148 6149 /// \brief The queue of implicit template instantiations that are required 6150 /// but have not yet been performed. 6151 std::deque<PendingImplicitInstantiation> PendingInstantiations; 6152 6153 /// \brief The queue of implicit template instantiations that are required 6154 /// and must be performed within the current local scope. 6155 /// 6156 /// This queue is only used for member functions of local classes in 6157 /// templates, which must be instantiated in the same scope as their 6158 /// enclosing function, so that they can reference function-local 6159 /// types, static variables, enumerators, etc. 6160 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 6161 6162 void PerformPendingInstantiations(bool LocalOnly = false); 6163 6164 TypeSourceInfo *SubstType(TypeSourceInfo *T, 6165 const MultiLevelTemplateArgumentList &TemplateArgs, 6166 SourceLocation Loc, DeclarationName Entity); 6167 6168 QualType SubstType(QualType T, 6169 const MultiLevelTemplateArgumentList &TemplateArgs, 6170 SourceLocation Loc, DeclarationName Entity); 6171 6172 TypeSourceInfo *SubstType(TypeLoc TL, 6173 const MultiLevelTemplateArgumentList &TemplateArgs, 6174 SourceLocation Loc, DeclarationName Entity); 6175 6176 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 6177 const MultiLevelTemplateArgumentList &TemplateArgs, 6178 SourceLocation Loc, 6179 DeclarationName Entity, 6180 CXXRecordDecl *ThisContext, 6181 unsigned ThisTypeQuals); 6182 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 6183 const MultiLevelTemplateArgumentList &TemplateArgs, 6184 int indexAdjustment, 6185 Optional<unsigned> NumExpansions, 6186 bool ExpectParameterPack); 6187 bool SubstParmTypes(SourceLocation Loc, 6188 ParmVarDecl **Params, unsigned NumParams, 6189 const MultiLevelTemplateArgumentList &TemplateArgs, 6190 SmallVectorImpl<QualType> &ParamTypes, 6191 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 6192 ExprResult SubstExpr(Expr *E, 6193 const MultiLevelTemplateArgumentList &TemplateArgs); 6194 6195 /// \brief Substitute the given template arguments into a list of 6196 /// expressions, expanding pack expansions if required. 6197 /// 6198 /// \param Exprs The list of expressions to substitute into. 6199 /// 6200 /// \param NumExprs The number of expressions in \p Exprs. 6201 /// 6202 /// \param IsCall Whether this is some form of call, in which case 6203 /// default arguments will be dropped. 6204 /// 6205 /// \param TemplateArgs The set of template arguments to substitute. 6206 /// 6207 /// \param Outputs Will receive all of the substituted arguments. 6208 /// 6209 /// \returns true if an error occurred, false otherwise. 6210 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 6211 const MultiLevelTemplateArgumentList &TemplateArgs, 6212 SmallVectorImpl<Expr *> &Outputs); 6213 6214 StmtResult SubstStmt(Stmt *S, 6215 const MultiLevelTemplateArgumentList &TemplateArgs); 6216 6217 Decl *SubstDecl(Decl *D, DeclContext *Owner, 6218 const MultiLevelTemplateArgumentList &TemplateArgs); 6219 6220 ExprResult SubstInitializer(Expr *E, 6221 const MultiLevelTemplateArgumentList &TemplateArgs, 6222 bool CXXDirectInit); 6223 6224 bool 6225 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 6226 CXXRecordDecl *Pattern, 6227 const MultiLevelTemplateArgumentList &TemplateArgs); 6228 6229 bool 6230 InstantiateClass(SourceLocation PointOfInstantiation, 6231 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 6232 const MultiLevelTemplateArgumentList &TemplateArgs, 6233 TemplateSpecializationKind TSK, 6234 bool Complain = true); 6235 6236 bool InstantiateEnum(SourceLocation PointOfInstantiation, 6237 EnumDecl *Instantiation, EnumDecl *Pattern, 6238 const MultiLevelTemplateArgumentList &TemplateArgs, 6239 TemplateSpecializationKind TSK); 6240 6241 struct LateInstantiatedAttribute { 6242 const Attr *TmplAttr; 6243 LocalInstantiationScope *Scope; 6244 Decl *NewDecl; 6245 6246 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 6247 Decl *D) 6248 : TmplAttr(A), Scope(S), NewDecl(D) 6249 { } 6250 }; 6251 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 6252 6253 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 6254 const Decl *Pattern, Decl *Inst, 6255 LateInstantiatedAttrVec *LateAttrs = 0, 6256 LocalInstantiationScope *OuterMostScope = 0); 6257 6258 bool 6259 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 6260 ClassTemplateSpecializationDecl *ClassTemplateSpec, 6261 TemplateSpecializationKind TSK, 6262 bool Complain = true); 6263 6264 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 6265 CXXRecordDecl *Instantiation, 6266 const MultiLevelTemplateArgumentList &TemplateArgs, 6267 TemplateSpecializationKind TSK); 6268 6269 void InstantiateClassTemplateSpecializationMembers( 6270 SourceLocation PointOfInstantiation, 6271 ClassTemplateSpecializationDecl *ClassTemplateSpec, 6272 TemplateSpecializationKind TSK); 6273 6274 NestedNameSpecifierLoc 6275 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 6276 const MultiLevelTemplateArgumentList &TemplateArgs); 6277 6278 DeclarationNameInfo 6279 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 6280 const MultiLevelTemplateArgumentList &TemplateArgs); 6281 TemplateName 6282 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 6283 SourceLocation Loc, 6284 const MultiLevelTemplateArgumentList &TemplateArgs); 6285 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 6286 TemplateArgumentListInfo &Result, 6287 const MultiLevelTemplateArgumentList &TemplateArgs); 6288 6289 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation, 6290 FunctionDecl *Function); 6291 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 6292 FunctionDecl *Function, 6293 bool Recursive = false, 6294 bool DefinitionRequired = false); 6295 void InstantiateStaticDataMemberDefinition( 6296 SourceLocation PointOfInstantiation, 6297 VarDecl *Var, 6298 bool Recursive = false, 6299 bool DefinitionRequired = false); 6300 6301 void InstantiateMemInitializers(CXXConstructorDecl *New, 6302 const CXXConstructorDecl *Tmpl, 6303 const MultiLevelTemplateArgumentList &TemplateArgs); 6304 6305 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 6306 const MultiLevelTemplateArgumentList &TemplateArgs); 6307 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 6308 const MultiLevelTemplateArgumentList &TemplateArgs); 6309 6310 // Objective-C declarations. 6311 enum ObjCContainerKind { 6312 OCK_None = -1, 6313 OCK_Interface = 0, 6314 OCK_Protocol, 6315 OCK_Category, 6316 OCK_ClassExtension, 6317 OCK_Implementation, 6318 OCK_CategoryImplementation 6319 }; 6320 ObjCContainerKind getObjCContainerKind() const; 6321 6322 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 6323 IdentifierInfo *ClassName, 6324 SourceLocation ClassLoc, 6325 IdentifierInfo *SuperName, 6326 SourceLocation SuperLoc, 6327 Decl * const *ProtoRefs, 6328 unsigned NumProtoRefs, 6329 const SourceLocation *ProtoLocs, 6330 SourceLocation EndProtoLoc, 6331 AttributeList *AttrList); 6332 6333 Decl *ActOnCompatibilityAlias( 6334 SourceLocation AtCompatibilityAliasLoc, 6335 IdentifierInfo *AliasName, SourceLocation AliasLocation, 6336 IdentifierInfo *ClassName, SourceLocation ClassLocation); 6337 6338 bool CheckForwardProtocolDeclarationForCircularDependency( 6339 IdentifierInfo *PName, 6340 SourceLocation &PLoc, SourceLocation PrevLoc, 6341 const ObjCList<ObjCProtocolDecl> &PList); 6342 6343 Decl *ActOnStartProtocolInterface( 6344 SourceLocation AtProtoInterfaceLoc, 6345 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 6346 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 6347 const SourceLocation *ProtoLocs, 6348 SourceLocation EndProtoLoc, 6349 AttributeList *AttrList); 6350 6351 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 6352 IdentifierInfo *ClassName, 6353 SourceLocation ClassLoc, 6354 IdentifierInfo *CategoryName, 6355 SourceLocation CategoryLoc, 6356 Decl * const *ProtoRefs, 6357 unsigned NumProtoRefs, 6358 const SourceLocation *ProtoLocs, 6359 SourceLocation EndProtoLoc); 6360 6361 Decl *ActOnStartClassImplementation( 6362 SourceLocation AtClassImplLoc, 6363 IdentifierInfo *ClassName, SourceLocation ClassLoc, 6364 IdentifierInfo *SuperClassname, 6365 SourceLocation SuperClassLoc); 6366 6367 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 6368 IdentifierInfo *ClassName, 6369 SourceLocation ClassLoc, 6370 IdentifierInfo *CatName, 6371 SourceLocation CatLoc); 6372 6373 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 6374 ArrayRef<Decl *> Decls); 6375 6376 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 6377 IdentifierInfo **IdentList, 6378 SourceLocation *IdentLocs, 6379 unsigned NumElts); 6380 6381 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 6382 const IdentifierLocPair *IdentList, 6383 unsigned NumElts, 6384 AttributeList *attrList); 6385 6386 void FindProtocolDeclaration(bool WarnOnDeclarations, 6387 const IdentifierLocPair *ProtocolId, 6388 unsigned NumProtocols, 6389 SmallVectorImpl<Decl *> &Protocols); 6390 6391 /// Ensure attributes are consistent with type. 6392 /// \param [in, out] Attributes The attributes to check; they will 6393 /// be modified to be consistent with \p PropertyTy. 6394 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 6395 SourceLocation Loc, 6396 unsigned &Attributes, 6397 bool propertyInPrimaryClass); 6398 6399 /// Process the specified property declaration and create decls for the 6400 /// setters and getters as needed. 6401 /// \param property The property declaration being processed 6402 /// \param CD The semantic container for the property 6403 /// \param redeclaredProperty Declaration for property if redeclared 6404 /// in class extension. 6405 /// \param lexicalDC Container for redeclaredProperty. 6406 void ProcessPropertyDecl(ObjCPropertyDecl *property, 6407 ObjCContainerDecl *CD, 6408 ObjCPropertyDecl *redeclaredProperty = 0, 6409 ObjCContainerDecl *lexicalDC = 0); 6410 6411 6412 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 6413 ObjCPropertyDecl *SuperProperty, 6414 const IdentifierInfo *Name); 6415 6416 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 6417 ObjCInterfaceDecl *ID); 6418 6419 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 6420 ObjCProtocolDecl *PDecl); 6421 6422 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 6423 Decl **allMethods = 0, unsigned allNum = 0, 6424 Decl **allProperties = 0, unsigned pNum = 0, 6425 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 6426 6427 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 6428 SourceLocation LParenLoc, 6429 FieldDeclarator &FD, ObjCDeclSpec &ODS, 6430 Selector GetterSel, Selector SetterSel, 6431 bool *OverridingProperty, 6432 tok::ObjCKeywordKind MethodImplKind, 6433 DeclContext *lexicalDC = 0); 6434 6435 Decl *ActOnPropertyImplDecl(Scope *S, 6436 SourceLocation AtLoc, 6437 SourceLocation PropertyLoc, 6438 bool ImplKind, 6439 IdentifierInfo *PropertyId, 6440 IdentifierInfo *PropertyIvar, 6441 SourceLocation PropertyIvarLoc); 6442 6443 enum ObjCSpecialMethodKind { 6444 OSMK_None, 6445 OSMK_Alloc, 6446 OSMK_New, 6447 OSMK_Copy, 6448 OSMK_RetainingInit, 6449 OSMK_NonRetainingInit 6450 }; 6451 6452 struct ObjCArgInfo { 6453 IdentifierInfo *Name; 6454 SourceLocation NameLoc; 6455 // The Type is null if no type was specified, and the DeclSpec is invalid 6456 // in this case. 6457 ParsedType Type; 6458 ObjCDeclSpec DeclSpec; 6459 6460 /// ArgAttrs - Attribute list for this argument. 6461 AttributeList *ArgAttrs; 6462 }; 6463 6464 Decl *ActOnMethodDeclaration( 6465 Scope *S, 6466 SourceLocation BeginLoc, // location of the + or -. 6467 SourceLocation EndLoc, // location of the ; or {. 6468 tok::TokenKind MethodType, 6469 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 6470 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 6471 // optional arguments. The number of types/arguments is obtained 6472 // from the Sel.getNumArgs(). 6473 ObjCArgInfo *ArgInfo, 6474 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 6475 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 6476 bool isVariadic, bool MethodDefinition); 6477 6478 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 6479 const ObjCObjectPointerType *OPT, 6480 bool IsInstance); 6481 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 6482 bool IsInstance); 6483 6484 bool CheckARCMethodDecl(ObjCMethodDecl *method); 6485 bool inferObjCARCLifetime(ValueDecl *decl); 6486 6487 ExprResult 6488 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 6489 Expr *BaseExpr, 6490 SourceLocation OpLoc, 6491 DeclarationName MemberName, 6492 SourceLocation MemberLoc, 6493 SourceLocation SuperLoc, QualType SuperType, 6494 bool Super); 6495 6496 ExprResult 6497 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 6498 IdentifierInfo &propertyName, 6499 SourceLocation receiverNameLoc, 6500 SourceLocation propertyNameLoc); 6501 6502 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 6503 6504 /// \brief Describes the kind of message expression indicated by a message 6505 /// send that starts with an identifier. 6506 enum ObjCMessageKind { 6507 /// \brief The message is sent to 'super'. 6508 ObjCSuperMessage, 6509 /// \brief The message is an instance message. 6510 ObjCInstanceMessage, 6511 /// \brief The message is a class message, and the identifier is a type 6512 /// name. 6513 ObjCClassMessage 6514 }; 6515 6516 ObjCMessageKind getObjCMessageKind(Scope *S, 6517 IdentifierInfo *Name, 6518 SourceLocation NameLoc, 6519 bool IsSuper, 6520 bool HasTrailingDot, 6521 ParsedType &ReceiverType); 6522 6523 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 6524 Selector Sel, 6525 SourceLocation LBracLoc, 6526 ArrayRef<SourceLocation> SelectorLocs, 6527 SourceLocation RBracLoc, 6528 MultiExprArg Args); 6529 6530 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 6531 QualType ReceiverType, 6532 SourceLocation SuperLoc, 6533 Selector Sel, 6534 ObjCMethodDecl *Method, 6535 SourceLocation LBracLoc, 6536 ArrayRef<SourceLocation> SelectorLocs, 6537 SourceLocation RBracLoc, 6538 MultiExprArg Args, 6539 bool isImplicit = false); 6540 6541 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 6542 bool isSuperReceiver, 6543 SourceLocation Loc, 6544 Selector Sel, 6545 ObjCMethodDecl *Method, 6546 MultiExprArg Args); 6547 6548 ExprResult ActOnClassMessage(Scope *S, 6549 ParsedType Receiver, 6550 Selector Sel, 6551 SourceLocation LBracLoc, 6552 ArrayRef<SourceLocation> SelectorLocs, 6553 SourceLocation RBracLoc, 6554 MultiExprArg Args); 6555 6556 ExprResult BuildInstanceMessage(Expr *Receiver, 6557 QualType ReceiverType, 6558 SourceLocation SuperLoc, 6559 Selector Sel, 6560 ObjCMethodDecl *Method, 6561 SourceLocation LBracLoc, 6562 ArrayRef<SourceLocation> SelectorLocs, 6563 SourceLocation RBracLoc, 6564 MultiExprArg Args, 6565 bool isImplicit = false); 6566 6567 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 6568 QualType ReceiverType, 6569 SourceLocation Loc, 6570 Selector Sel, 6571 ObjCMethodDecl *Method, 6572 MultiExprArg Args); 6573 6574 ExprResult ActOnInstanceMessage(Scope *S, 6575 Expr *Receiver, 6576 Selector Sel, 6577 SourceLocation LBracLoc, 6578 ArrayRef<SourceLocation> SelectorLocs, 6579 SourceLocation RBracLoc, 6580 MultiExprArg Args); 6581 6582 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 6583 ObjCBridgeCastKind Kind, 6584 SourceLocation BridgeKeywordLoc, 6585 TypeSourceInfo *TSInfo, 6586 Expr *SubExpr); 6587 6588 ExprResult ActOnObjCBridgedCast(Scope *S, 6589 SourceLocation LParenLoc, 6590 ObjCBridgeCastKind Kind, 6591 SourceLocation BridgeKeywordLoc, 6592 ParsedType Type, 6593 SourceLocation RParenLoc, 6594 Expr *SubExpr); 6595 6596 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 6597 6598 /// \brief Check whether the given new method is a valid override of the 6599 /// given overridden method, and set any properties that should be inherited. 6600 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 6601 const ObjCMethodDecl *Overridden); 6602 6603 /// \brief Describes the compatibility of a result type with its method. 6604 enum ResultTypeCompatibilityKind { 6605 RTC_Compatible, 6606 RTC_Incompatible, 6607 RTC_Unknown 6608 }; 6609 6610 void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, 6611 ObjCInterfaceDecl *CurrentClass, 6612 ResultTypeCompatibilityKind RTC); 6613 6614 enum PragmaOptionsAlignKind { 6615 POAK_Native, // #pragma options align=native 6616 POAK_Natural, // #pragma options align=natural 6617 POAK_Packed, // #pragma options align=packed 6618 POAK_Power, // #pragma options align=power 6619 POAK_Mac68k, // #pragma options align=mac68k 6620 POAK_Reset // #pragma options align=reset 6621 }; 6622 6623 /// ActOnPragmaOptionsAlign - Called on well formed \#pragma options align. 6624 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 6625 SourceLocation PragmaLoc); 6626 6627 enum PragmaPackKind { 6628 PPK_Default, // #pragma pack([n]) 6629 PPK_Show, // #pragma pack(show), only supported by MSVC. 6630 PPK_Push, // #pragma pack(push, [identifier], [n]) 6631 PPK_Pop // #pragma pack(pop, [identifier], [n]) 6632 }; 6633 6634 enum PragmaMSStructKind { 6635 PMSST_OFF, // #pragms ms_struct off 6636 PMSST_ON // #pragms ms_struct on 6637 }; 6638 6639 enum PragmaMSCommentKind { 6640 PCK_Unknown, 6641 PCK_Linker, // #pragma comment(linker, ...) 6642 PCK_Lib, // #pragma comment(lib, ...) 6643 PCK_Compiler, // #pragma comment(compiler, ...) 6644 PCK_ExeStr, // #pragma comment(exestr, ...) 6645 PCK_User // #pragma comment(user, ...) 6646 }; 6647 6648 /// ActOnPragmaPack - Called on well formed \#pragma pack(...). 6649 void ActOnPragmaPack(PragmaPackKind Kind, 6650 IdentifierInfo *Name, 6651 Expr *Alignment, 6652 SourceLocation PragmaLoc, 6653 SourceLocation LParenLoc, 6654 SourceLocation RParenLoc); 6655 6656 /// ActOnPragmaMSStruct - Called on well formed \#pragma ms_struct [on|off]. 6657 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 6658 6659 /// ActOnPragmaMSStruct - Called on well formed \#pragma comment(kind, "arg"). 6660 void ActOnPragmaMSComment(PragmaMSCommentKind Kind, StringRef Arg); 6661 6662 /// ActOnPragmaDetectMismatch - Call on well-formed \#pragma detect_mismatch 6663 void ActOnPragmaDetectMismatch(StringRef Name, StringRef Value); 6664 6665 /// ActOnPragmaUnused - Called on well-formed '\#pragma unused'. 6666 void ActOnPragmaUnused(const Token &Identifier, 6667 Scope *curScope, 6668 SourceLocation PragmaLoc); 6669 6670 /// ActOnPragmaVisibility - Called on well formed \#pragma GCC visibility... . 6671 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 6672 SourceLocation PragmaLoc); 6673 6674 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 6675 SourceLocation Loc); 6676 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 6677 6678 /// ActOnPragmaWeakID - Called on well formed \#pragma weak ident. 6679 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 6680 SourceLocation PragmaLoc, 6681 SourceLocation WeakNameLoc); 6682 6683 /// ActOnPragmaRedefineExtname - Called on well formed 6684 /// \#pragma redefine_extname oldname newname. 6685 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 6686 IdentifierInfo* AliasName, 6687 SourceLocation PragmaLoc, 6688 SourceLocation WeakNameLoc, 6689 SourceLocation AliasNameLoc); 6690 6691 /// ActOnPragmaWeakAlias - Called on well formed \#pragma weak ident = ident. 6692 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 6693 IdentifierInfo* AliasName, 6694 SourceLocation PragmaLoc, 6695 SourceLocation WeakNameLoc, 6696 SourceLocation AliasNameLoc); 6697 6698 /// ActOnPragmaFPContract - Called on well formed 6699 /// \#pragma {STDC,OPENCL} FP_CONTRACT 6700 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 6701 6702 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 6703 /// a the record decl, to handle '\#pragma pack' and '\#pragma options align'. 6704 void AddAlignmentAttributesForRecord(RecordDecl *RD); 6705 6706 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 6707 void AddMsStructLayoutForRecord(RecordDecl *RD); 6708 6709 /// FreePackedContext - Deallocate and null out PackContext. 6710 void FreePackedContext(); 6711 6712 /// PushNamespaceVisibilityAttr - Note that we've entered a 6713 /// namespace with a visibility attribute. 6714 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 6715 SourceLocation Loc); 6716 6717 /// AddPushedVisibilityAttribute - If '\#pragma GCC visibility' was used, 6718 /// add an appropriate visibility attribute. 6719 void AddPushedVisibilityAttribute(Decl *RD); 6720 6721 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 6722 /// for '\#pragma GCC visibility' and visibility attributes on namespaces. 6723 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 6724 6725 /// FreeVisContext - Deallocate and null out VisContext. 6726 void FreeVisContext(); 6727 6728 /// AddCFAuditedAttribute - Check whether we're currently within 6729 /// '\#pragma clang arc_cf_code_audited' and, if so, consider adding 6730 /// the appropriate attribute. 6731 void AddCFAuditedAttribute(Decl *D); 6732 6733 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 6734 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E, 6735 unsigned SpellingListIndex, bool IsPackExpansion); 6736 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T, 6737 unsigned SpellingListIndex, bool IsPackExpansion); 6738 6739 // OpenMP directives and clauses. 6740 /// \brief Called on correct id-expression from the '#pragma omp 6741 /// threadprivate'. 6742 ExprResult ActOnOpenMPIdExpression(Scope *CurScope, 6743 CXXScopeSpec &ScopeSpec, 6744 const DeclarationNameInfo &Id); 6745 /// \brief Called on well-formed '#pragma omp threadprivate'. 6746 DeclGroupPtrTy ActOnOpenMPThreadprivateDirective( 6747 SourceLocation Loc, 6748 ArrayRef<Expr *> VarList); 6749 // \brief Builds a new OpenMPThreadPrivateDecl and checks its correctness. 6750 OMPThreadPrivateDecl *CheckOMPThreadPrivateDecl( 6751 SourceLocation Loc, 6752 ArrayRef<Expr *> VarList); 6753 6754 /// \brief The kind of conversion being performed. 6755 enum CheckedConversionKind { 6756 /// \brief An implicit conversion. 6757 CCK_ImplicitConversion, 6758 /// \brief A C-style cast. 6759 CCK_CStyleCast, 6760 /// \brief A functional-style cast. 6761 CCK_FunctionalCast, 6762 /// \brief A cast other than a C-style cast. 6763 CCK_OtherCast 6764 }; 6765 6766 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 6767 /// cast. If there is already an implicit cast, merge into the existing one. 6768 /// If isLvalue, the result of the cast is an lvalue. 6769 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 6770 ExprValueKind VK = VK_RValue, 6771 const CXXCastPath *BasePath = 0, 6772 CheckedConversionKind CCK 6773 = CCK_ImplicitConversion); 6774 6775 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 6776 /// to the conversion from scalar type ScalarTy to the Boolean type. 6777 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 6778 6779 /// IgnoredValueConversions - Given that an expression's result is 6780 /// syntactically ignored, perform any conversions that are 6781 /// required. 6782 ExprResult IgnoredValueConversions(Expr *E); 6783 6784 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 6785 // functions and arrays to their respective pointers (C99 6.3.2.1). 6786 ExprResult UsualUnaryConversions(Expr *E); 6787 6788 // DefaultFunctionArrayConversion - converts functions and arrays 6789 // to their respective pointers (C99 6.3.2.1). 6790 ExprResult DefaultFunctionArrayConversion(Expr *E); 6791 6792 // DefaultFunctionArrayLvalueConversion - converts functions and 6793 // arrays to their respective pointers and performs the 6794 // lvalue-to-rvalue conversion. 6795 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 6796 6797 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 6798 // the operand. This is DefaultFunctionArrayLvalueConversion, 6799 // except that it assumes the operand isn't of function or array 6800 // type. 6801 ExprResult DefaultLvalueConversion(Expr *E); 6802 6803 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 6804 // do not have a prototype. Integer promotions are performed on each 6805 // argument, and arguments that have type float are promoted to double. 6806 ExprResult DefaultArgumentPromotion(Expr *E); 6807 6808 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 6809 enum VariadicCallType { 6810 VariadicFunction, 6811 VariadicBlock, 6812 VariadicMethod, 6813 VariadicConstructor, 6814 VariadicDoesNotApply 6815 }; 6816 6817 VariadicCallType getVariadicCallType(FunctionDecl *FDecl, 6818 const FunctionProtoType *Proto, 6819 Expr *Fn); 6820 6821 // Used for determining in which context a type is allowed to be passed to a 6822 // vararg function. 6823 enum VarArgKind { 6824 VAK_Valid, 6825 VAK_ValidInCXX11, 6826 VAK_Invalid 6827 }; 6828 6829 // Determines which VarArgKind fits an expression. 6830 VarArgKind isValidVarArgType(const QualType &Ty); 6831 6832 /// GatherArgumentsForCall - Collector argument expressions for various 6833 /// form of call prototypes. 6834 bool GatherArgumentsForCall(SourceLocation CallLoc, 6835 FunctionDecl *FDecl, 6836 const FunctionProtoType *Proto, 6837 unsigned FirstProtoArg, 6838 ArrayRef<Expr *> Args, 6839 SmallVector<Expr *, 8> &AllArgs, 6840 VariadicCallType CallType = VariadicDoesNotApply, 6841 bool AllowExplicit = false, 6842 bool IsListInitialization = false); 6843 6844 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6845 // will create a runtime trap if the resulting type is not a POD type. 6846 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6847 FunctionDecl *FDecl); 6848 6849 /// Checks to see if the given expression is a valid argument to a variadic 6850 /// function, issuing a diagnostic and returning NULL if not. 6851 bool variadicArgumentPODCheck(const Expr *E, VariadicCallType CT); 6852 6853 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6854 // operands and then handles various conversions that are common to binary 6855 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6856 // routine returns the first non-arithmetic type found. The client is 6857 // responsible for emitting appropriate error diagnostics. 6858 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6859 bool IsCompAssign = false); 6860 6861 /// AssignConvertType - All of the 'assignment' semantic checks return this 6862 /// enum to indicate whether the assignment was allowed. These checks are 6863 /// done for simple assignments, as well as initialization, return from 6864 /// function, argument passing, etc. The query is phrased in terms of a 6865 /// source and destination type. 6866 enum AssignConvertType { 6867 /// Compatible - the types are compatible according to the standard. 6868 Compatible, 6869 6870 /// PointerToInt - The assignment converts a pointer to an int, which we 6871 /// accept as an extension. 6872 PointerToInt, 6873 6874 /// IntToPointer - The assignment converts an int to a pointer, which we 6875 /// accept as an extension. 6876 IntToPointer, 6877 6878 /// FunctionVoidPointer - The assignment is between a function pointer and 6879 /// void*, which the standard doesn't allow, but we accept as an extension. 6880 FunctionVoidPointer, 6881 6882 /// IncompatiblePointer - The assignment is between two pointers types that 6883 /// are not compatible, but we accept them as an extension. 6884 IncompatiblePointer, 6885 6886 /// IncompatiblePointer - The assignment is between two pointers types which 6887 /// point to integers which have a different sign, but are otherwise 6888 /// identical. This is a subset of the above, but broken out because it's by 6889 /// far the most common case of incompatible pointers. 6890 IncompatiblePointerSign, 6891 6892 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6893 /// c/v/r qualifiers, which we accept as an extension. 6894 CompatiblePointerDiscardsQualifiers, 6895 6896 /// IncompatiblePointerDiscardsQualifiers - The assignment 6897 /// discards qualifiers that we don't permit to be discarded, 6898 /// like address spaces. 6899 IncompatiblePointerDiscardsQualifiers, 6900 6901 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6902 /// nested pointer types, and the qualifiers other than the first two 6903 /// levels differ e.g. char ** -> const char **, but we accept them as an 6904 /// extension. 6905 IncompatibleNestedPointerQualifiers, 6906 6907 /// IncompatibleVectors - The assignment is between two vector types that 6908 /// have the same size, which we accept as an extension. 6909 IncompatibleVectors, 6910 6911 /// IntToBlockPointer - The assignment converts an int to a block 6912 /// pointer. We disallow this. 6913 IntToBlockPointer, 6914 6915 /// IncompatibleBlockPointer - The assignment is between two block 6916 /// pointers types that are not compatible. 6917 IncompatibleBlockPointer, 6918 6919 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6920 /// id type and something else (that is incompatible with it). For example, 6921 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6922 IncompatibleObjCQualifiedId, 6923 6924 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6925 /// object with __weak qualifier. 6926 IncompatibleObjCWeakRef, 6927 6928 /// Incompatible - We reject this conversion outright, it is invalid to 6929 /// represent it in the AST. 6930 Incompatible 6931 }; 6932 6933 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6934 /// assignment conversion type specified by ConvTy. This returns true if the 6935 /// conversion was invalid or false if the conversion was accepted. 6936 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6937 SourceLocation Loc, 6938 QualType DstType, QualType SrcType, 6939 Expr *SrcExpr, AssignmentAction Action, 6940 bool *Complained = 0); 6941 6942 /// DiagnoseAssignmentEnum - Warn if assignment to enum is a constant 6943 /// integer not in the range of enum values. 6944 void DiagnoseAssignmentEnum(QualType DstType, QualType SrcType, 6945 Expr *SrcExpr); 6946 6947 /// CheckAssignmentConstraints - Perform type checking for assignment, 6948 /// argument passing, variable initialization, and function return values. 6949 /// C99 6.5.16. 6950 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6951 QualType LHSType, 6952 QualType RHSType); 6953 6954 /// Check assignment constraints and prepare for a conversion of the 6955 /// RHS to the LHS type. 6956 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6957 ExprResult &RHS, 6958 CastKind &Kind); 6959 6960 // CheckSingleAssignmentConstraints - Currently used by 6961 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6962 // this routine performs the default function/array converions. 6963 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6964 ExprResult &RHS, 6965 bool Diagnose = true); 6966 6967 // \brief If the lhs type is a transparent union, check whether we 6968 // can initialize the transparent union with the given expression. 6969 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6970 ExprResult &RHS); 6971 6972 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6973 6974 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6975 6976 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6977 AssignmentAction Action, 6978 bool AllowExplicit = false); 6979 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6980 AssignmentAction Action, 6981 bool AllowExplicit, 6982 ImplicitConversionSequence& ICS); 6983 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6984 const ImplicitConversionSequence& ICS, 6985 AssignmentAction Action, 6986 CheckedConversionKind CCK 6987 = CCK_ImplicitConversion); 6988 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6989 const StandardConversionSequence& SCS, 6990 AssignmentAction Action, 6991 CheckedConversionKind CCK); 6992 6993 /// the following "Check" methods will return a valid/converted QualType 6994 /// or a null QualType (indicating an error diagnostic was issued). 6995 6996 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6997 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6998 ExprResult &RHS); 6999 QualType CheckPointerToMemberOperands( // C++ 5.5 7000 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 7001 SourceLocation OpLoc, bool isIndirect); 7002 QualType CheckMultiplyDivideOperands( // C99 6.5.5 7003 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 7004 bool IsDivide); 7005 QualType CheckRemainderOperands( // C99 6.5.5 7006 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 7007 bool IsCompAssign = false); 7008 QualType CheckAdditionOperands( // C99 6.5.6 7009 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 7010 QualType* CompLHSTy = 0); 7011 QualType CheckSubtractionOperands( // C99 6.5.6 7012 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 7013 QualType* CompLHSTy = 0); 7014 QualType CheckShiftOperands( // C99 6.5.7 7015 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 7016 bool IsCompAssign = false); 7017 QualType CheckCompareOperands( // C99 6.5.8/9 7018 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 7019 bool isRelational); 7020 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 7021 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 7022 bool IsCompAssign = false); 7023 QualType CheckLogicalOperands( // C99 6.5.[13,14] 7024 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 7025 // CheckAssignmentOperands is used for both simple and compound assignment. 7026 // For simple assignment, pass both expressions and a null converted type. 7027 // For compound assignment, pass both expressions and the converted type. 7028 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 7029 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 7030 7031 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 7032 UnaryOperatorKind Opcode, Expr *Op); 7033 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 7034 BinaryOperatorKind Opcode, 7035 Expr *LHS, Expr *RHS); 7036 ExprResult checkPseudoObjectRValue(Expr *E); 7037 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 7038 7039 QualType CheckConditionalOperands( // C99 6.5.15 7040 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 7041 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 7042 QualType CXXCheckConditionalOperands( // C++ 5.16 7043 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 7044 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 7045 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 7046 bool *NonStandardCompositeType = 0); 7047 QualType FindCompositePointerType(SourceLocation Loc, 7048 ExprResult &E1, ExprResult &E2, 7049 bool *NonStandardCompositeType = 0) { 7050 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 7051 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 7052 NonStandardCompositeType); 7053 E1 = Owned(E1Tmp); 7054 E2 = Owned(E2Tmp); 7055 return Composite; 7056 } 7057 7058 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 7059 SourceLocation QuestionLoc); 7060 7061 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 7062 SourceLocation QuestionLoc); 7063 7064 /// type checking for vector binary operators. 7065 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 7066 SourceLocation Loc, bool IsCompAssign); 7067 QualType GetSignedVectorType(QualType V); 7068 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 7069 SourceLocation Loc, bool isRelational); 7070 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 7071 SourceLocation Loc); 7072 7073 /// type checking declaration initializers (C99 6.7.8) 7074 bool CheckForConstantInitializer(Expr *e, QualType t); 7075 7076 // type checking C++ declaration initializers (C++ [dcl.init]). 7077 7078 /// ReferenceCompareResult - Expresses the result of comparing two 7079 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 7080 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 7081 enum ReferenceCompareResult { 7082 /// Ref_Incompatible - The two types are incompatible, so direct 7083 /// reference binding is not possible. 7084 Ref_Incompatible = 0, 7085 /// Ref_Related - The two types are reference-related, which means 7086 /// that their unqualified forms (T1 and T2) are either the same 7087 /// or T1 is a base class of T2. 7088 Ref_Related, 7089 /// Ref_Compatible_With_Added_Qualification - The two types are 7090 /// reference-compatible with added qualification, meaning that 7091 /// they are reference-compatible and the qualifiers on T1 (cv1) 7092 /// are greater than the qualifiers on T2 (cv2). 7093 Ref_Compatible_With_Added_Qualification, 7094 /// Ref_Compatible - The two types are reference-compatible and 7095 /// have equivalent qualifiers (cv1 == cv2). 7096 Ref_Compatible 7097 }; 7098 7099 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 7100 QualType T1, QualType T2, 7101 bool &DerivedToBase, 7102 bool &ObjCConversion, 7103 bool &ObjCLifetimeConversion); 7104 7105 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 7106 Expr *CastExpr, CastKind &CastKind, 7107 ExprValueKind &VK, CXXCastPath &Path); 7108 7109 /// \brief Force an expression with unknown-type to an expression of the 7110 /// given type. 7111 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 7112 7113 /// \brief Type-check an expression that's being passed to an 7114 /// __unknown_anytype parameter. 7115 ExprResult checkUnknownAnyArg(SourceLocation callLoc, 7116 Expr *result, QualType ¶mType); 7117 7118 // CheckVectorCast - check type constraints for vectors. 7119 // Since vectors are an extension, there are no C standard reference for this. 7120 // We allow casting between vectors and integer datatypes of the same size. 7121 // returns true if the cast is invalid 7122 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 7123 CastKind &Kind); 7124 7125 // CheckExtVectorCast - check type constraints for extended vectors. 7126 // Since vectors are an extension, there are no C standard reference for this. 7127 // We allow casting between vectors and integer datatypes of the same size, 7128 // or vectors and the element type of that vector. 7129 // returns the cast expr 7130 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 7131 CastKind &Kind); 7132 7133 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 7134 SourceLocation LParenLoc, 7135 Expr *CastExpr, 7136 SourceLocation RParenLoc); 7137 7138 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 7139 7140 /// \brief Checks for invalid conversions and casts between 7141 /// retainable pointers and other pointer kinds. 7142 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 7143 QualType castType, Expr *&op, 7144 CheckedConversionKind CCK); 7145 7146 Expr *stripARCUnbridgedCast(Expr *e); 7147 void diagnoseARCUnbridgedCast(Expr *e); 7148 7149 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 7150 QualType ExprType); 7151 7152 /// checkRetainCycles - Check whether an Objective-C message send 7153 /// might create an obvious retain cycle. 7154 void checkRetainCycles(ObjCMessageExpr *msg); 7155 void checkRetainCycles(Expr *receiver, Expr *argument); 7156 void checkRetainCycles(VarDecl *Var, Expr *Init); 7157 7158 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 7159 /// to weak/__unsafe_unretained type. 7160 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 7161 7162 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 7163 /// to weak/__unsafe_unretained expression. 7164 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 7165 7166 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 7167 /// \param Method - May be null. 7168 /// \param [out] ReturnType - The return type of the send. 7169 /// \return true iff there were any incompatible types. 7170 bool CheckMessageArgumentTypes(QualType ReceiverType, 7171 MultiExprArg Args, Selector Sel, 7172 ArrayRef<SourceLocation> SelectorLocs, 7173 ObjCMethodDecl *Method, bool isClassMessage, 7174 bool isSuperMessage, 7175 SourceLocation lbrac, SourceLocation rbrac, 7176 QualType &ReturnType, ExprValueKind &VK); 7177 7178 /// \brief Determine the result of a message send expression based on 7179 /// the type of the receiver, the method expected to receive the message, 7180 /// and the form of the message send. 7181 QualType getMessageSendResultType(QualType ReceiverType, 7182 ObjCMethodDecl *Method, 7183 bool isClassMessage, bool isSuperMessage); 7184 7185 /// \brief If the given expression involves a message send to a method 7186 /// with a related result type, emit a note describing what happened. 7187 void EmitRelatedResultTypeNote(const Expr *E); 7188 7189 /// \brief Given that we had incompatible pointer types in a return 7190 /// statement, check whether we're in a method with a related result 7191 /// type, and if so, emit a note describing what happened. 7192 void EmitRelatedResultTypeNoteForReturn(QualType destType); 7193 7194 /// CheckBooleanCondition - Diagnose problems involving the use of 7195 /// the given expression as a boolean condition (e.g. in an if 7196 /// statement). Also performs the standard function and array 7197 /// decays, possibly changing the input variable. 7198 /// 7199 /// \param Loc - A location associated with the condition, e.g. the 7200 /// 'if' keyword. 7201 /// \return true iff there were any errors 7202 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 7203 7204 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 7205 Expr *SubExpr); 7206 7207 /// DiagnoseAssignmentAsCondition - Given that an expression is 7208 /// being used as a boolean condition, warn if it's an assignment. 7209 void DiagnoseAssignmentAsCondition(Expr *E); 7210 7211 /// \brief Redundant parentheses over an equality comparison can indicate 7212 /// that the user intended an assignment used as condition. 7213 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 7214 7215 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 7216 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 7217 7218 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 7219 /// the specified width and sign. If an overflow occurs, detect it and emit 7220 /// the specified diagnostic. 7221 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 7222 unsigned NewWidth, bool NewSign, 7223 SourceLocation Loc, unsigned DiagID); 7224 7225 /// Checks that the Objective-C declaration is declared in the global scope. 7226 /// Emits an error and marks the declaration as invalid if it's not declared 7227 /// in the global scope. 7228 bool CheckObjCDeclScope(Decl *D); 7229 7230 /// \brief Abstract base class used for diagnosing integer constant 7231 /// expression violations. 7232 class VerifyICEDiagnoser { 7233 public: 7234 bool Suppress; 7235 7236 VerifyICEDiagnoser(bool Suppress = false) : Suppress(Suppress) { } 7237 7238 virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) =0; 7239 virtual void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR); 7240 virtual ~VerifyICEDiagnoser() { } 7241 }; 7242 7243 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 7244 /// and reports the appropriate diagnostics. Returns false on success. 7245 /// Can optionally return the value of the expression. 7246 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 7247 VerifyICEDiagnoser &Diagnoser, 7248 bool AllowFold = true); 7249 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 7250 unsigned DiagID, 7251 bool AllowFold = true); 7252 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result=0); 7253 7254 /// VerifyBitField - verifies that a bit field expression is an ICE and has 7255 /// the correct width, and that the field type is valid. 7256 /// Returns false on success. 7257 /// Can optionally return whether the bit-field is of width 0 7258 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 7259 QualType FieldTy, Expr *BitWidth, 7260 bool *ZeroWidth = 0); 7261 7262 enum CUDAFunctionTarget { 7263 CFT_Device, 7264 CFT_Global, 7265 CFT_Host, 7266 CFT_HostDevice 7267 }; 7268 7269 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 7270 7271 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 7272 CUDAFunctionTarget CalleeTarget); 7273 7274 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 7275 return CheckCUDATarget(IdentifyCUDATarget(Caller), 7276 IdentifyCUDATarget(Callee)); 7277 } 7278 7279 /// \name Code completion 7280 //@{ 7281 /// \brief Describes the context in which code completion occurs. 7282 enum ParserCompletionContext { 7283 /// \brief Code completion occurs at top-level or namespace context. 7284 PCC_Namespace, 7285 /// \brief Code completion occurs within a class, struct, or union. 7286 PCC_Class, 7287 /// \brief Code completion occurs within an Objective-C interface, protocol, 7288 /// or category. 7289 PCC_ObjCInterface, 7290 /// \brief Code completion occurs within an Objective-C implementation or 7291 /// category implementation 7292 PCC_ObjCImplementation, 7293 /// \brief Code completion occurs within the list of instance variables 7294 /// in an Objective-C interface, protocol, category, or implementation. 7295 PCC_ObjCInstanceVariableList, 7296 /// \brief Code completion occurs following one or more template 7297 /// headers. 7298 PCC_Template, 7299 /// \brief Code completion occurs following one or more template 7300 /// headers within a class. 7301 PCC_MemberTemplate, 7302 /// \brief Code completion occurs within an expression. 7303 PCC_Expression, 7304 /// \brief Code completion occurs within a statement, which may 7305 /// also be an expression or a declaration. 7306 PCC_Statement, 7307 /// \brief Code completion occurs at the beginning of the 7308 /// initialization statement (or expression) in a for loop. 7309 PCC_ForInit, 7310 /// \brief Code completion occurs within the condition of an if, 7311 /// while, switch, or for statement. 7312 PCC_Condition, 7313 /// \brief Code completion occurs within the body of a function on a 7314 /// recovery path, where we do not have a specific handle on our position 7315 /// in the grammar. 7316 PCC_RecoveryInFunction, 7317 /// \brief Code completion occurs where only a type is permitted. 7318 PCC_Type, 7319 /// \brief Code completion occurs in a parenthesized expression, which 7320 /// might also be a type cast. 7321 PCC_ParenthesizedExpression, 7322 /// \brief Code completion occurs within a sequence of declaration 7323 /// specifiers within a function, method, or block. 7324 PCC_LocalDeclarationSpecifiers 7325 }; 7326 7327 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 7328 void CodeCompleteOrdinaryName(Scope *S, 7329 ParserCompletionContext CompletionContext); 7330 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 7331 bool AllowNonIdentifiers, 7332 bool AllowNestedNameSpecifiers); 7333 7334 struct CodeCompleteExpressionData; 7335 void CodeCompleteExpression(Scope *S, 7336 const CodeCompleteExpressionData &Data); 7337 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 7338 SourceLocation OpLoc, 7339 bool IsArrow); 7340 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 7341 void CodeCompleteTag(Scope *S, unsigned TagSpec); 7342 void CodeCompleteTypeQualifiers(DeclSpec &DS); 7343 void CodeCompleteCase(Scope *S); 7344 void CodeCompleteCall(Scope *S, Expr *Fn, ArrayRef<Expr *> Args); 7345 void CodeCompleteInitializer(Scope *S, Decl *D); 7346 void CodeCompleteReturn(Scope *S); 7347 void CodeCompleteAfterIf(Scope *S); 7348 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 7349 7350 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 7351 bool EnteringContext); 7352 void CodeCompleteUsing(Scope *S); 7353 void CodeCompleteUsingDirective(Scope *S); 7354 void CodeCompleteNamespaceDecl(Scope *S); 7355 void CodeCompleteNamespaceAliasDecl(Scope *S); 7356 void CodeCompleteOperatorName(Scope *S); 7357 void CodeCompleteConstructorInitializer(Decl *Constructor, 7358 CXXCtorInitializer** Initializers, 7359 unsigned NumInitializers); 7360 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 7361 bool AfterAmpersand); 7362 7363 void CodeCompleteObjCAtDirective(Scope *S); 7364 void CodeCompleteObjCAtVisibility(Scope *S); 7365 void CodeCompleteObjCAtStatement(Scope *S); 7366 void CodeCompleteObjCAtExpression(Scope *S); 7367 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 7368 void CodeCompleteObjCPropertyGetter(Scope *S); 7369 void CodeCompleteObjCPropertySetter(Scope *S); 7370 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 7371 bool IsParameter); 7372 void CodeCompleteObjCMessageReceiver(Scope *S); 7373 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 7374 IdentifierInfo **SelIdents, 7375 unsigned NumSelIdents, 7376 bool AtArgumentExpression); 7377 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 7378 IdentifierInfo **SelIdents, 7379 unsigned NumSelIdents, 7380 bool AtArgumentExpression, 7381 bool IsSuper = false); 7382 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 7383 IdentifierInfo **SelIdents, 7384 unsigned NumSelIdents, 7385 bool AtArgumentExpression, 7386 ObjCInterfaceDecl *Super = 0); 7387 void CodeCompleteObjCForCollection(Scope *S, 7388 DeclGroupPtrTy IterationVar); 7389 void CodeCompleteObjCSelector(Scope *S, 7390 IdentifierInfo **SelIdents, 7391 unsigned NumSelIdents); 7392 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 7393 unsigned NumProtocols); 7394 void CodeCompleteObjCProtocolDecl(Scope *S); 7395 void CodeCompleteObjCInterfaceDecl(Scope *S); 7396 void CodeCompleteObjCSuperclass(Scope *S, 7397 IdentifierInfo *ClassName, 7398 SourceLocation ClassNameLoc); 7399 void CodeCompleteObjCImplementationDecl(Scope *S); 7400 void CodeCompleteObjCInterfaceCategory(Scope *S, 7401 IdentifierInfo *ClassName, 7402 SourceLocation ClassNameLoc); 7403 void CodeCompleteObjCImplementationCategory(Scope *S, 7404 IdentifierInfo *ClassName, 7405 SourceLocation ClassNameLoc); 7406 void CodeCompleteObjCPropertyDefinition(Scope *S); 7407 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 7408 IdentifierInfo *PropertyName); 7409 void CodeCompleteObjCMethodDecl(Scope *S, 7410 bool IsInstanceMethod, 7411 ParsedType ReturnType); 7412 void CodeCompleteObjCMethodDeclSelector(Scope *S, 7413 bool IsInstanceMethod, 7414 bool AtParameterName, 7415 ParsedType ReturnType, 7416 IdentifierInfo **SelIdents, 7417 unsigned NumSelIdents); 7418 void CodeCompletePreprocessorDirective(bool InConditional); 7419 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 7420 void CodeCompletePreprocessorMacroName(bool IsDefinition); 7421 void CodeCompletePreprocessorExpression(); 7422 void CodeCompletePreprocessorMacroArgument(Scope *S, 7423 IdentifierInfo *Macro, 7424 MacroInfo *MacroInfo, 7425 unsigned Argument); 7426 void CodeCompleteNaturalLanguage(); 7427 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 7428 CodeCompletionTUInfo &CCTUInfo, 7429 SmallVectorImpl<CodeCompletionResult> &Results); 7430 //@} 7431 7432 //===--------------------------------------------------------------------===// 7433 // Extra semantic analysis beyond the C type system 7434 7435public: 7436 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 7437 unsigned ByteNo) const; 7438 7439private: 7440 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 7441 const ArraySubscriptExpr *ASE=0, 7442 bool AllowOnePastEnd=true, bool IndexNegated=false); 7443 void CheckArrayAccess(const Expr *E); 7444 // Used to grab the relevant information from a FormatAttr and a 7445 // FunctionDeclaration. 7446 struct FormatStringInfo { 7447 unsigned FormatIdx; 7448 unsigned FirstDataArg; 7449 bool HasVAListArg; 7450 }; 7451 7452 bool getFormatStringInfo(const FormatAttr *Format, bool IsCXXMember, 7453 FormatStringInfo *FSI); 7454 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall, 7455 const FunctionProtoType *Proto); 7456 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 7457 ArrayRef<const Expr *> Args); 7458 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall, 7459 const FunctionProtoType *Proto); 7460 void CheckConstructorCall(FunctionDecl *FDecl, 7461 ArrayRef<const Expr *> Args, 7462 const FunctionProtoType *Proto, 7463 SourceLocation Loc); 7464 7465 void checkCall(NamedDecl *FDecl, ArrayRef<const Expr *> Args, 7466 unsigned NumProtoArgs, bool IsMemberFunction, 7467 SourceLocation Loc, SourceRange Range, 7468 VariadicCallType CallType); 7469 7470 7471 bool CheckObjCString(Expr *Arg); 7472 7473 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 7474 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 7475 bool CheckMipsBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 7476 7477 bool SemaBuiltinVAStart(CallExpr *TheCall); 7478 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 7479 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 7480 7481public: 7482 // Used by C++ template instantiation. 7483 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 7484 7485private: 7486 bool SemaBuiltinPrefetch(CallExpr *TheCall); 7487 bool SemaBuiltinObjectSize(CallExpr *TheCall); 7488 bool SemaBuiltinLongjmp(CallExpr *TheCall); 7489 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 7490 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 7491 AtomicExpr::AtomicOp Op); 7492 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 7493 llvm::APSInt &Result); 7494 7495 enum FormatStringType { 7496 FST_Scanf, 7497 FST_Printf, 7498 FST_NSString, 7499 FST_Strftime, 7500 FST_Strfmon, 7501 FST_Kprintf, 7502 FST_Unknown 7503 }; 7504 static FormatStringType GetFormatStringType(const FormatAttr *Format); 7505 7506 enum StringLiteralCheckType { 7507 SLCT_NotALiteral, 7508 SLCT_UncheckedLiteral, 7509 SLCT_CheckedLiteral 7510 }; 7511 7512 StringLiteralCheckType checkFormatStringExpr(const Expr *E, 7513 ArrayRef<const Expr *> Args, 7514 bool HasVAListArg, 7515 unsigned format_idx, 7516 unsigned firstDataArg, 7517 FormatStringType Type, 7518 VariadicCallType CallType, 7519 bool inFunctionCall = true); 7520 7521 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 7522 ArrayRef<const Expr *> Args, bool HasVAListArg, 7523 unsigned format_idx, unsigned firstDataArg, 7524 FormatStringType Type, bool inFunctionCall, 7525 VariadicCallType CallType); 7526 7527 bool CheckFormatArguments(const FormatAttr *Format, 7528 ArrayRef<const Expr *> Args, 7529 bool IsCXXMember, 7530 VariadicCallType CallType, 7531 SourceLocation Loc, SourceRange Range); 7532 bool CheckFormatArguments(ArrayRef<const Expr *> Args, 7533 bool HasVAListArg, unsigned format_idx, 7534 unsigned firstDataArg, FormatStringType Type, 7535 VariadicCallType CallType, 7536 SourceLocation Loc, SourceRange range); 7537 7538 void CheckNonNullArguments(const NonNullAttr *NonNull, 7539 const Expr * const *ExprArgs, 7540 SourceLocation CallSiteLoc); 7541 7542 void CheckMemaccessArguments(const CallExpr *Call, 7543 unsigned BId, 7544 IdentifierInfo *FnName); 7545 7546 void CheckStrlcpycatArguments(const CallExpr *Call, 7547 IdentifierInfo *FnName); 7548 7549 void CheckStrncatArguments(const CallExpr *Call, 7550 IdentifierInfo *FnName); 7551 7552 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 7553 SourceLocation ReturnLoc); 7554 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 7555 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 7556 void CheckForIntOverflow(Expr *E); 7557 void CheckUnsequencedOperations(Expr *E); 7558 7559 /// \brief Perform semantic checks on a completed expression. This will either 7560 /// be a full-expression or a default argument expression. 7561 void CheckCompletedExpr(Expr *E, SourceLocation CheckLoc = SourceLocation(), 7562 bool IsConstexpr = false); 7563 7564 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 7565 Expr *Init); 7566 7567public: 7568 /// \brief Register a magic integral constant to be used as a type tag. 7569 void RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind, 7570 uint64_t MagicValue, QualType Type, 7571 bool LayoutCompatible, bool MustBeNull); 7572 7573 struct TypeTagData { 7574 TypeTagData() {} 7575 7576 TypeTagData(QualType Type, bool LayoutCompatible, bool MustBeNull) : 7577 Type(Type), LayoutCompatible(LayoutCompatible), 7578 MustBeNull(MustBeNull) 7579 {} 7580 7581 QualType Type; 7582 7583 /// If true, \c Type should be compared with other expression's types for 7584 /// layout-compatibility. 7585 unsigned LayoutCompatible : 1; 7586 unsigned MustBeNull : 1; 7587 }; 7588 7589 /// A pair of ArgumentKind identifier and magic value. This uniquely 7590 /// identifies the magic value. 7591 typedef std::pair<const IdentifierInfo *, uint64_t> TypeTagMagicValue; 7592 7593private: 7594 /// \brief A map from magic value to type information. 7595 OwningPtr<llvm::DenseMap<TypeTagMagicValue, TypeTagData> > 7596 TypeTagForDatatypeMagicValues; 7597 7598 /// \brief Peform checks on a call of a function with argument_with_type_tag 7599 /// or pointer_with_type_tag attributes. 7600 void CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr, 7601 const Expr * const *ExprArgs); 7602 7603 /// \brief The parser's current scope. 7604 /// 7605 /// The parser maintains this state here. 7606 Scope *CurScope; 7607 7608 mutable IdentifierInfo *Ident_super; 7609 7610protected: 7611 friend class Parser; 7612 friend class InitializationSequence; 7613 friend class ASTReader; 7614 friend class ASTWriter; 7615 7616public: 7617 /// \brief Retrieve the parser's current scope. 7618 /// 7619 /// This routine must only be used when it is certain that semantic analysis 7620 /// and the parser are in precisely the same context, which is not the case 7621 /// when, e.g., we are performing any kind of template instantiation. 7622 /// Therefore, the only safe places to use this scope are in the parser 7623 /// itself and in routines directly invoked from the parser and *never* from 7624 /// template substitution or instantiation. 7625 Scope *getCurScope() const { return CurScope; } 7626 7627 IdentifierInfo *getSuperIdentifier() const; 7628 7629 Decl *getObjCDeclContext() const; 7630 7631 DeclContext *getCurLexicalContext() const { 7632 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 7633 } 7634 7635 AvailabilityResult getCurContextAvailability() const; 7636 7637 const DeclContext *getCurObjCLexicalContext() const { 7638 const DeclContext *DC = getCurLexicalContext(); 7639 // A category implicitly has the attribute of the interface. 7640 if (const ObjCCategoryDecl *CatD = dyn_cast<ObjCCategoryDecl>(DC)) 7641 DC = CatD->getClassInterface(); 7642 return DC; 7643 } 7644}; 7645 7646/// \brief RAII object that enters a new expression evaluation context. 7647class EnterExpressionEvaluationContext { 7648 Sema &Actions; 7649 7650public: 7651 EnterExpressionEvaluationContext(Sema &Actions, 7652 Sema::ExpressionEvaluationContext NewContext, 7653 Decl *LambdaContextDecl = 0, 7654 bool IsDecltype = false) 7655 : Actions(Actions) { 7656 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 7657 IsDecltype); 7658 } 7659 EnterExpressionEvaluationContext(Sema &Actions, 7660 Sema::ExpressionEvaluationContext NewContext, 7661 Sema::ReuseLambdaContextDecl_t, 7662 bool IsDecltype = false) 7663 : Actions(Actions) { 7664 Actions.PushExpressionEvaluationContext(NewContext, 7665 Sema::ReuseLambdaContextDecl, 7666 IsDecltype); 7667 } 7668 7669 ~EnterExpressionEvaluationContext() { 7670 Actions.PopExpressionEvaluationContext(); 7671 } 7672}; 7673 7674} // end namespace clang 7675 7676#endif 7677