Sema.h revision dbbdec994f5a96b5c25aaa679cd86ecabf545f7b
1baa3858d3f5d128a5c8466b700098109edcad5f2repo sync//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 3baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// The LLVM Compiler Infrastructure 4baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 5baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// This file is distributed under the University of Illinois Open Source 6baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// License. See LICENSE.TXT for details. 7baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 8baa3858d3f5d128a5c8466b700098109edcad5f2repo sync//===----------------------------------------------------------------------===// 9baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 10baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// This file defines the Sema class, which performs semantic analysis and 11baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// builds ASTs. 12baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 13baa3858d3f5d128a5c8466b700098109edcad5f2repo sync//===----------------------------------------------------------------------===// 14baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 15baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#ifndef LLVM_CLANG_SEMA_SEMA_H 16baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#define LLVM_CLANG_SEMA_SEMA_H 17baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 18baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/Ownership.h" 19baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/AnalysisBasedWarnings.h" 20baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/IdentifierResolver.h" 21baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/ObjCMethodList.h" 22baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/DeclSpec.h" 23baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/ExternalSemaSource.h" 24baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/LocInfoType.h" 25baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/MultiInitializer.h" 26baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/TypoCorrection.h" 27baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Sema/Weak.h" 28baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/AST/Expr.h" 29baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/AST/DeclarationName.h" 30baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/AST/ExternalASTSource.h" 31baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/AST/TypeLoc.h" 32baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Basic/Specifiers.h" 33baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Basic/TemplateKinds.h" 34baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Basic/TypeTraits.h" 35baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "clang/Basic/ExpressionTraits.h" 36baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "llvm/ADT/ArrayRef.h" 37baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "llvm/ADT/OwningPtr.h" 38baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "llvm/ADT/SmallPtrSet.h" 39baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include "llvm/ADT/SmallVector.h" 40baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include <deque> 41baa3858d3f5d128a5c8466b700098109edcad5f2repo sync#include <string> 42baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 43baa3858d3f5d128a5c8466b700098109edcad5f2repo syncnamespace llvm { 44baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class APSInt; 45baa3858d3f5d128a5c8466b700098109edcad5f2repo sync template <typename ValueT> struct DenseMapInfo; 46baa3858d3f5d128a5c8466b700098109edcad5f2repo sync template <typename ValueT, typename ValueInfoT> class DenseSet; 47baa3858d3f5d128a5c8466b700098109edcad5f2repo sync} 48baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 49baa3858d3f5d128a5c8466b700098109edcad5f2repo syncnamespace clang { 50baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ADLResult; 51baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ASTConsumer; 52baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ASTContext; 53baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ASTMutationListener; 54baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ASTReader; 55baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ASTWriter; 56baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ArrayType; 57baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class AttributeList; 58baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class BlockDecl; 59baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXBasePath; 60baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXBasePaths; 61baa3858d3f5d128a5c8466b700098109edcad5f2repo sync typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 62baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXConstructorDecl; 63baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXConversionDecl; 64baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXDestructorDecl; 65baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXFieldCollector; 66baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXMemberCallExpr; 67baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXMethodDecl; 68baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXScopeSpec; 69baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXTemporary; 70baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CXXTryStmt; 71baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CallExpr; 72baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ClassTemplateDecl; 73baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ClassTemplatePartialSpecializationDecl; 74baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ClassTemplateSpecializationDecl; 75baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CodeCompleteConsumer; 76baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CodeCompletionAllocator; 77baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class CodeCompletionResult; 78baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Decl; 79baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DeclAccessPair; 80baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DeclContext; 81baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DeclRefExpr; 82baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DeclaratorDecl; 83baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DeducedTemplateArgument; 84baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DependentDiagnostic; 85baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DesignatedInitExpr; 86baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Designation; 87baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class EnumConstantDecl; 88baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Expr; 89baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ExtVectorType; 90baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ExternalSemaSource; 91baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FormatAttr; 92baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FriendDecl; 93baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FunctionDecl; 94baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FunctionProtoType; 95baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FunctionTemplateDecl; 96baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ImplicitConversionSequence; 97baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class InitListExpr; 98baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class InitializationKind; 99baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class InitializationSequence; 100baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class InitializedEntity; 101baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class IntegerLiteral; 102baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class LabelStmt; 103baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class LangOptions; 104baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class LocalInstantiationScope; 105baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class LookupResult; 106baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class MacroInfo; 107baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class MultiLevelTemplateArgumentList; 108baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class NamedDecl; 109baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class NonNullAttr; 110baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCCategoryDecl; 111baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCCategoryImplDecl; 112baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCCompatibleAliasDecl; 113baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCContainerDecl; 114baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCImplDecl; 115baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCImplementationDecl; 116baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCInterfaceDecl; 117baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCIvarDecl; 118baa3858d3f5d128a5c8466b700098109edcad5f2repo sync template <class T> class ObjCList; 119baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCMessageExpr; 120baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCMethodDecl; 121baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCPropertyDecl; 122baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ObjCProtocolDecl; 123baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class OverloadCandidateSet; 124baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class OverloadExpr; 125baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ParenListExpr; 126baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ParmVarDecl; 127baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Preprocessor; 128baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class PseudoDestructorTypeStorage; 129baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class QualType; 130baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class StandardConversionSequence; 131baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Stmt; 132baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class StringLiteral; 133baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class SwitchStmt; 134baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TargetAttributesSema; 135baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateArgument; 136baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateArgumentList; 137baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateArgumentLoc; 138baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateDecl; 139baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateParameterList; 140baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplatePartialOrderingContext; 141baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateTemplateParmDecl; 142baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class Token; 143baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TypeAliasDecl; 144baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TypedefDecl; 145baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TypedefNameDecl; 146baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TypeLoc; 147baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UnqualifiedId; 148baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UnresolvedLookupExpr; 149baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UnresolvedMemberExpr; 150baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UnresolvedSetImpl; 151baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UnresolvedSetIterator; 152baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UsingDecl; 153baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class UsingShadowDecl; 154baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class ValueDecl; 155baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class VarDecl; 156baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class VisibilityAttr; 157baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class VisibleDeclConsumer; 158baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class IndirectFieldDecl; 159baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 160baa3858d3f5d128a5c8466b700098109edcad5f2repo syncnamespace sema { 161baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class AccessedEntity; 162baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class BlockScopeInfo; 163baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class DelayedDiagnostic; 164baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class FunctionScopeInfo; 165baa3858d3f5d128a5c8466b700098109edcad5f2repo sync class TemplateDeductionInfo; 166baa3858d3f5d128a5c8466b700098109edcad5f2repo sync} 167baa3858d3f5d128a5c8466b700098109edcad5f2repo sync 168baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// FIXME: No way to easily map from TemplateTypeParmTypes to 169baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// TemplateTypeParmDecls, so we have this horrible PointerUnion. 170baa3858d3f5d128a5c8466b700098109edcad5f2repo synctypedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 171 SourceLocation> UnexpandedParameterPack; 172 173/// Sema - This implements semantic analysis and AST building for C. 174class Sema { 175 Sema(const Sema&); // DO NOT IMPLEMENT 176 void operator=(const Sema&); // DO NOT IMPLEMENT 177 mutable const TargetAttributesSema* TheTargetAttributesSema; 178public: 179 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 180 typedef OpaquePtr<TemplateName> TemplateTy; 181 typedef OpaquePtr<QualType> TypeTy; 182 183 OpenCLOptions OpenCLFeatures; 184 FPOptions FPFeatures; 185 186 const LangOptions &LangOpts; 187 Preprocessor &PP; 188 ASTContext &Context; 189 ASTConsumer &Consumer; 190 DiagnosticsEngine &Diags; 191 SourceManager &SourceMgr; 192 193 /// \brief Flag indicating whether or not to collect detailed statistics. 194 bool CollectStats; 195 196 /// \brief Source of additional semantic information. 197 ExternalSemaSource *ExternalSource; 198 199 /// \brief Code-completion consumer. 200 CodeCompleteConsumer *CodeCompleter; 201 202 /// CurContext - This is the current declaration context of parsing. 203 DeclContext *CurContext; 204 205 /// \brief Generally null except when we temporarily switch decl contexts, 206 /// like in \see ActOnObjCTemporaryExitContainerContext. 207 DeclContext *OriginalLexicalContext; 208 209 /// VAListTagName - The declaration name corresponding to __va_list_tag. 210 /// This is used as part of a hack to omit that class from ADL results. 211 DeclarationName VAListTagName; 212 213 /// PackContext - Manages the stack for #pragma pack. An alignment 214 /// of 0 indicates default alignment. 215 void *PackContext; // Really a "PragmaPackStack*" 216 217 bool MSStructPragmaOn; // True when #pragma ms_struct on 218 219 /// VisContext - Manages the stack for #pragma GCC visibility. 220 void *VisContext; // Really a "PragmaVisStack*" 221 222 /// ExprNeedsCleanups - True if the current evaluation context 223 /// requires cleanups to be run at its conclusion. 224 bool ExprNeedsCleanups; 225 226 /// \brief Stack containing information about each of the nested 227 /// function, block, and method scopes that are currently active. 228 /// 229 /// This array is never empty. Clients should ignore the first 230 /// element, which is used to cache a single FunctionScopeInfo 231 /// that's used to parse every top-level function. 232 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 233 234 /// ExprTemporaries - This is the stack of temporaries that are created by 235 /// the current full expression. 236 SmallVector<CXXTemporary*, 8> ExprTemporaries; 237 238 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 239 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 240 ExtVectorDeclsType; 241 242 /// ExtVectorDecls - This is a list all the extended vector types. This allows 243 /// us to associate a raw vector type with one of the ext_vector type names. 244 /// This is only necessary for issuing pretty diagnostics. 245 ExtVectorDeclsType ExtVectorDecls; 246 247 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 248 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 249 250 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 251 252 /// PureVirtualClassDiagSet - a set of class declarations which we have 253 /// emitted a list of pure virtual functions. Used to prevent emitting the 254 /// same list more than once. 255 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 256 257 /// ParsingInitForAutoVars - a set of declarations with auto types for which 258 /// we are currently parsing the initializer. 259 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 260 261 /// \brief A mapping from external names to the most recent 262 /// locally-scoped external declaration with that name. 263 /// 264 /// This map contains external declarations introduced in local 265 /// scoped, e.g., 266 /// 267 /// \code 268 /// void f() { 269 /// void foo(int, int); 270 /// } 271 /// \endcode 272 /// 273 /// Here, the name "foo" will be associated with the declaration on 274 /// "foo" within f. This name is not visible outside of 275 /// "f". However, we still find it in two cases: 276 /// 277 /// - If we are declaring another external with the name "foo", we 278 /// can find "foo" as a previous declaration, so that the types 279 /// of this external declaration can be checked for 280 /// compatibility. 281 /// 282 /// - If we would implicitly declare "foo" (e.g., due to a call to 283 /// "foo" in C when no prototype or definition is visible), then 284 /// we find this declaration of "foo" and complain that it is 285 /// not visible. 286 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 287 288 /// \brief Look for a locally scoped external declaration by the given name. 289 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 290 findLocallyScopedExternalDecl(DeclarationName Name); 291 292 typedef LazyVector<VarDecl *, ExternalSemaSource, 293 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 294 TentativeDefinitionsType; 295 296 /// \brief All the tentative definitions encountered in the TU. 297 TentativeDefinitionsType TentativeDefinitions; 298 299 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 300 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 301 UnusedFileScopedDeclsType; 302 303 /// \brief The set of file scoped decls seen so far that have not been used 304 /// and must warn if not used. Only contains the first declaration. 305 UnusedFileScopedDeclsType UnusedFileScopedDecls; 306 307 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 308 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 309 DelegatingCtorDeclsType; 310 311 /// \brief All the delegating constructors seen so far in the file, used for 312 /// cycle detection at the end of the TU. 313 DelegatingCtorDeclsType DelegatingCtorDecls; 314 315 /// \brief All the overriding destructors seen during a class definition 316 /// (there could be multiple due to nested classes) that had their exception 317 /// spec checks delayed, plus the overridden destructor. 318 SmallVector<std::pair<const CXXDestructorDecl*, 319 const CXXDestructorDecl*>, 2> 320 DelayedDestructorExceptionSpecChecks; 321 322 /// \brief Callback to the parser to parse templated functions when needed. 323 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 324 LateTemplateParserCB *LateTemplateParser; 325 void *OpaqueParser; 326 327 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 328 LateTemplateParser = LTP; 329 OpaqueParser = P; 330 } 331 332 class DelayedDiagnostics; 333 334 class ParsingDeclState { 335 unsigned SavedStackSize; 336 friend class Sema::DelayedDiagnostics; 337 }; 338 339 class ProcessingContextState { 340 unsigned SavedParsingDepth; 341 unsigned SavedActiveStackBase; 342 friend class Sema::DelayedDiagnostics; 343 }; 344 345 /// A class which encapsulates the logic for delaying diagnostics 346 /// during parsing and other processing. 347 class DelayedDiagnostics { 348 /// \brief The stack of diagnostics that were delayed due to being 349 /// produced during the parsing of a declaration. 350 sema::DelayedDiagnostic *Stack; 351 352 /// \brief The number of objects on the delayed-diagnostics stack. 353 unsigned StackSize; 354 355 /// \brief The current capacity of the delayed-diagnostics stack. 356 unsigned StackCapacity; 357 358 /// \brief The index of the first "active" delayed diagnostic in 359 /// the stack. When parsing class definitions, we ignore active 360 /// delayed diagnostics from the surrounding context. 361 unsigned ActiveStackBase; 362 363 /// \brief The depth of the declarations we're currently parsing. 364 /// This gets saved and reset whenever we enter a class definition. 365 unsigned ParsingDepth; 366 367 public: 368 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 369 ActiveStackBase(0), ParsingDepth(0) {} 370 371 ~DelayedDiagnostics() { 372 delete[] reinterpret_cast<char*>(Stack); 373 } 374 375 /// Adds a delayed diagnostic. 376 void add(const sema::DelayedDiagnostic &diag); 377 378 /// Determines whether diagnostics should be delayed. 379 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 380 381 /// Observe that we've started parsing a declaration. Access and 382 /// deprecation diagnostics will be delayed; when the declaration 383 /// is completed, all active delayed diagnostics will be evaluated 384 /// in its context, and then active diagnostics stack will be 385 /// popped down to the saved depth. 386 ParsingDeclState pushParsingDecl() { 387 ParsingDepth++; 388 389 ParsingDeclState state; 390 state.SavedStackSize = StackSize; 391 return state; 392 } 393 394 /// Observe that we're completed parsing a declaration. 395 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 396 397 /// Observe that we've started processing a different context, the 398 /// contents of which are semantically separate from the 399 /// declarations it may lexically appear in. This sets aside the 400 /// current stack of active diagnostics and starts afresh. 401 ProcessingContextState pushContext() { 402 assert(StackSize >= ActiveStackBase); 403 404 ProcessingContextState state; 405 state.SavedParsingDepth = ParsingDepth; 406 state.SavedActiveStackBase = ActiveStackBase; 407 408 ActiveStackBase = StackSize; 409 ParsingDepth = 0; 410 411 return state; 412 } 413 414 /// Observe that we've stopped processing a context. This 415 /// restores the previous stack of active diagnostics. 416 void popContext(ProcessingContextState state) { 417 assert(ActiveStackBase == StackSize); 418 assert(ParsingDepth == 0); 419 ActiveStackBase = state.SavedActiveStackBase; 420 ParsingDepth = state.SavedParsingDepth; 421 } 422 } DelayedDiagnostics; 423 424 /// A RAII object to temporarily push a declaration context. 425 class ContextRAII { 426 private: 427 Sema &S; 428 DeclContext *SavedContext; 429 ProcessingContextState SavedContextState; 430 431 public: 432 ContextRAII(Sema &S, DeclContext *ContextToPush) 433 : S(S), SavedContext(S.CurContext), 434 SavedContextState(S.DelayedDiagnostics.pushContext()) 435 { 436 assert(ContextToPush && "pushing null context"); 437 S.CurContext = ContextToPush; 438 } 439 440 void pop() { 441 if (!SavedContext) return; 442 S.CurContext = SavedContext; 443 S.DelayedDiagnostics.popContext(SavedContextState); 444 SavedContext = 0; 445 } 446 447 ~ContextRAII() { 448 pop(); 449 } 450 }; 451 452 /// WeakUndeclaredIdentifiers - Identifiers contained in 453 /// #pragma weak before declared. rare. may alias another 454 /// identifier, declared or undeclared 455 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 456 457 /// \brief Load weak undeclared identifiers from the external source. 458 void LoadExternalWeakUndeclaredIdentifiers(); 459 460 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 461 /// #pragma weak during processing of other Decls. 462 /// I couldn't figure out a clean way to generate these in-line, so 463 /// we store them here and handle separately -- which is a hack. 464 /// It would be best to refactor this. 465 SmallVector<Decl*,2> WeakTopLevelDecl; 466 467 IdentifierResolver IdResolver; 468 469 /// Translation Unit Scope - useful to Objective-C actions that need 470 /// to lookup file scope declarations in the "ordinary" C decl namespace. 471 /// For example, user-defined classes, built-in "id" type, etc. 472 Scope *TUScope; 473 474 /// \brief The C++ "std" namespace, where the standard library resides. 475 LazyDeclPtr StdNamespace; 476 477 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 478 /// standard library. 479 LazyDeclPtr StdBadAlloc; 480 481 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 482 RecordDecl *CXXTypeInfoDecl; 483 484 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 485 RecordDecl *MSVCGuidDecl; 486 487 /// A flag to remember whether the implicit forms of operator new and delete 488 /// have been declared. 489 bool GlobalNewDeleteDeclared; 490 491 492 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 493 /// call was found yet. 494 bool ObjCShouldCallSuperDealloc; 495 /// A flag that is set when parsing a -finalize method and no [super finalize] 496 /// call was found yet. 497 bool ObjCShouldCallSuperFinalize; 498 499 /// \brief The set of declarations that have been referenced within 500 /// a potentially evaluated expression. 501 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 502 PotentiallyReferencedDecls; 503 504 /// \brief A set of diagnostics that may be emitted. 505 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 506 PotentiallyEmittedDiagnostics; 507 508 /// \brief Describes how the expressions currently being parsed are 509 /// evaluated at run-time, if at all. 510 enum ExpressionEvaluationContext { 511 /// \brief The current expression and its subexpressions occur within an 512 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 513 /// or the subexpression of \c sizeof, where the type or the value of the 514 /// expression may be significant but no code will be generated to evaluate 515 /// the value of the expression at run time. 516 Unevaluated, 517 518 /// \brief The current expression is potentially evaluated at run time, 519 /// which means that code may be generated to evaluate the value of the 520 /// expression at run time. 521 PotentiallyEvaluated, 522 523 /// \brief The current expression may be potentially evaluated or it may 524 /// be unevaluated, but it is impossible to tell from the lexical context. 525 /// This evaluation context is used primary for the operand of the C++ 526 /// \c typeid expression, whose argument is potentially evaluated only when 527 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 528 PotentiallyPotentiallyEvaluated, 529 530 /// \brief The current expression is potentially evaluated, but any 531 /// declarations referenced inside that expression are only used if 532 /// in fact the current expression is used. 533 /// 534 /// This value is used when parsing default function arguments, for which 535 /// we would like to provide diagnostics (e.g., passing non-POD arguments 536 /// through varargs) but do not want to mark declarations as "referenced" 537 /// until the default argument is used. 538 PotentiallyEvaluatedIfUsed 539 }; 540 541 /// \brief Data structure used to record current or nested 542 /// expression evaluation contexts. 543 struct ExpressionEvaluationContextRecord { 544 /// \brief The expression evaluation context. 545 ExpressionEvaluationContext Context; 546 547 /// \brief Whether the enclosing context needed a cleanup. 548 bool ParentNeedsCleanups; 549 550 /// \brief The number of temporaries that were active when we 551 /// entered this expression evaluation context. 552 unsigned NumTemporaries; 553 554 /// \brief The set of declarations referenced within a 555 /// potentially potentially-evaluated context. 556 /// 557 /// When leaving a potentially potentially-evaluated context, each 558 /// of these elements will be as referenced if the corresponding 559 /// potentially potentially evaluated expression is potentially 560 /// evaluated. 561 PotentiallyReferencedDecls *PotentiallyReferenced; 562 563 /// \brief The set of diagnostics to emit should this potentially 564 /// potentially-evaluated context become evaluated. 565 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 566 567 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 568 unsigned NumTemporaries, 569 bool ParentNeedsCleanups) 570 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 571 NumTemporaries(NumTemporaries), 572 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 573 574 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 575 if (!PotentiallyReferenced) 576 PotentiallyReferenced = new PotentiallyReferencedDecls; 577 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 578 } 579 580 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 581 if (!PotentiallyDiagnosed) 582 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 583 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 584 } 585 586 void Destroy() { 587 delete PotentiallyReferenced; 588 delete PotentiallyDiagnosed; 589 PotentiallyReferenced = 0; 590 PotentiallyDiagnosed = 0; 591 } 592 }; 593 594 /// A stack of expression evaluation contexts. 595 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 596 597 /// SpecialMemberOverloadResult - The overloading result for a special member 598 /// function. 599 /// 600 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 601 /// integer is used to determine whether we have a parameter qualification 602 /// match, the second-lowest is whether we had success in resolving the 603 /// overload to a unique non-deleted function. 604 /// 605 /// The ConstParamMatch bit represents whether, when looking up a copy 606 /// constructor or assignment operator, we found a potential copy 607 /// constructor/assignment operator whose first parameter is const-qualified. 608 /// This is used for determining parameter types of other objects and is 609 /// utterly meaningless on other types of special members. 610 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 611 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 612 public: 613 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 614 : FastFoldingSetNode(ID) 615 {} 616 617 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 618 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 619 620 bool hasSuccess() const { return Pair.getInt() & 0x1; } 621 void setSuccess(bool B) { 622 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 623 } 624 625 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 626 void setConstParamMatch(bool B) { 627 Pair.setInt(B << 1 | unsigned(hasSuccess())); 628 } 629 }; 630 631 /// \brief A cache of special member function overload resolution results 632 /// for C++ records. 633 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 634 635 /// \brief The kind of translation unit we are processing. 636 /// 637 /// When we're processing a complete translation unit, Sema will perform 638 /// end-of-translation-unit semantic tasks (such as creating 639 /// initializers for tentative definitions in C) once parsing has 640 /// completed. Modules and precompiled headers perform different kinds of 641 /// checks. 642 TranslationUnitKind TUKind; 643 644 llvm::BumpPtrAllocator BumpAlloc; 645 646 /// \brief The number of SFINAE diagnostics that have been trapped. 647 unsigned NumSFINAEErrors; 648 649 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 650 UnparsedDefaultArgInstantiationsMap; 651 652 /// \brief A mapping from parameters with unparsed default arguments to the 653 /// set of instantiations of each parameter. 654 /// 655 /// This mapping is a temporary data structure used when parsing 656 /// nested class templates or nested classes of class templates, 657 /// where we might end up instantiating an inner class before the 658 /// default arguments of its methods have been parsed. 659 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 660 661 // Contains the locations of the beginning of unparsed default 662 // argument locations. 663 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 664 665 /// UndefinedInternals - all the used, undefined objects with 666 /// internal linkage in this translation unit. 667 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 668 669 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 670 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 671 672 /// Method Pool - allows efficient lookup when typechecking messages to "id". 673 /// We need to maintain a list, since selectors can have differing signatures 674 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 675 /// of selectors are "overloaded"). 676 GlobalMethodPool MethodPool; 677 678 /// Method selectors used in a @selector expression. Used for implementation 679 /// of -Wselector. 680 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 681 682 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 683 684 /// Private Helper predicate to check for 'self'. 685 bool isSelfExpr(Expr *RExpr); 686public: 687 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 688 TranslationUnitKind TUKind = TU_Complete, 689 CodeCompleteConsumer *CompletionConsumer = 0); 690 ~Sema(); 691 692 /// \brief Perform initialization that occurs after the parser has been 693 /// initialized but before it parses anything. 694 void Initialize(); 695 696 const LangOptions &getLangOptions() const { return LangOpts; } 697 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 698 FPOptions &getFPOptions() { return FPFeatures; } 699 700 DiagnosticsEngine &getDiagnostics() const { return Diags; } 701 SourceManager &getSourceManager() const { return SourceMgr; } 702 const TargetAttributesSema &getTargetAttributesSema() const; 703 Preprocessor &getPreprocessor() const { return PP; } 704 ASTContext &getASTContext() const { return Context; } 705 ASTConsumer &getASTConsumer() const { return Consumer; } 706 ASTMutationListener *getASTMutationListener() const; 707 708 void PrintStats() const; 709 710 /// \brief Helper class that creates diagnostics with optional 711 /// template instantiation stacks. 712 /// 713 /// This class provides a wrapper around the basic DiagnosticBuilder 714 /// class that emits diagnostics. SemaDiagnosticBuilder is 715 /// responsible for emitting the diagnostic (as DiagnosticBuilder 716 /// does) and, if the diagnostic comes from inside a template 717 /// instantiation, printing the template instantiation stack as 718 /// well. 719 class SemaDiagnosticBuilder : public DiagnosticBuilder { 720 Sema &SemaRef; 721 unsigned DiagID; 722 723 public: 724 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 725 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 726 727 explicit SemaDiagnosticBuilder(Sema &SemaRef) 728 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 729 730 ~SemaDiagnosticBuilder(); 731 }; 732 733 /// \brief Emit a diagnostic. 734 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 735 736 /// \brief Emit a partial diagnostic. 737 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 738 739 /// \brief Build a partial diagnostic. 740 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 741 742 bool findMacroSpelling(SourceLocation &loc, StringRef name); 743 744 ExprResult Owned(Expr* E) { return E; } 745 ExprResult Owned(ExprResult R) { return R; } 746 StmtResult Owned(Stmt* S) { return S; } 747 748 void ActOnEndOfTranslationUnit(); 749 750 void CheckDelegatingCtorCycles(); 751 752 Scope *getScopeForContext(DeclContext *Ctx); 753 754 void PushFunctionScope(); 755 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 756 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 757 const Decl *D = 0, const BlockExpr *blkExpr = 0); 758 759 sema::FunctionScopeInfo *getCurFunction() const { 760 return FunctionScopes.back(); 761 } 762 763 bool hasAnyUnrecoverableErrorsInThisFunction() const; 764 765 /// \brief Retrieve the current block, if any. 766 sema::BlockScopeInfo *getCurBlock(); 767 768 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 769 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 770 771 //===--------------------------------------------------------------------===// 772 // Type Analysis / Processing: SemaType.cpp. 773 // 774 775 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 776 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 777 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 778 } 779 QualType BuildPointerType(QualType T, 780 SourceLocation Loc, DeclarationName Entity); 781 QualType BuildReferenceType(QualType T, bool LValueRef, 782 SourceLocation Loc, DeclarationName Entity); 783 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 784 Expr *ArraySize, unsigned Quals, 785 SourceRange Brackets, DeclarationName Entity); 786 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 787 SourceLocation AttrLoc); 788 QualType BuildFunctionType(QualType T, 789 QualType *ParamTypes, unsigned NumParamTypes, 790 bool Variadic, unsigned Quals, 791 RefQualifierKind RefQualifier, 792 SourceLocation Loc, DeclarationName Entity, 793 FunctionType::ExtInfo Info); 794 QualType BuildMemberPointerType(QualType T, QualType Class, 795 SourceLocation Loc, 796 DeclarationName Entity); 797 QualType BuildBlockPointerType(QualType T, 798 SourceLocation Loc, DeclarationName Entity); 799 QualType BuildParenType(QualType T); 800 QualType BuildAtomicType(QualType T, SourceLocation Loc); 801 802 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 803 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 804 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 805 TypeSourceInfo *ReturnTypeInfo); 806 /// \brief Package the given type and TSI into a ParsedType. 807 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 808 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 809 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 810 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 811 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 812 bool CheckDistantExceptionSpec(QualType T); 813 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 814 bool CheckEquivalentExceptionSpec( 815 const FunctionProtoType *Old, SourceLocation OldLoc, 816 const FunctionProtoType *New, SourceLocation NewLoc); 817 bool CheckEquivalentExceptionSpec( 818 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 819 const FunctionProtoType *Old, SourceLocation OldLoc, 820 const FunctionProtoType *New, SourceLocation NewLoc, 821 bool *MissingExceptionSpecification = 0, 822 bool *MissingEmptyExceptionSpecification = 0, 823 bool AllowNoexceptAllMatchWithNoSpec = false, 824 bool IsOperatorNew = false); 825 bool CheckExceptionSpecSubset( 826 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 827 const FunctionProtoType *Superset, SourceLocation SuperLoc, 828 const FunctionProtoType *Subset, SourceLocation SubLoc); 829 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Target, SourceLocation TargetLoc, 831 const FunctionProtoType *Source, SourceLocation SourceLoc); 832 833 TypeResult ActOnTypeName(Scope *S, Declarator &D); 834 835 /// \brief The parser has parsed the context-sensitive type 'instancetype' 836 /// in an Objective-C message declaration. Return the appropriate type. 837 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 838 839 bool RequireCompleteType(SourceLocation Loc, QualType T, 840 const PartialDiagnostic &PD, 841 std::pair<SourceLocation, PartialDiagnostic> Note); 842 bool RequireCompleteType(SourceLocation Loc, QualType T, 843 const PartialDiagnostic &PD); 844 bool RequireCompleteType(SourceLocation Loc, QualType T, 845 unsigned DiagID); 846 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 847 std::pair<SourceLocation, 848 PartialDiagnostic> Note); 849 850 bool RequireLiteralType(SourceLocation Loc, QualType T, 851 const PartialDiagnostic &PD, 852 bool AllowIncompleteType = false); 853 854 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 855 const CXXScopeSpec &SS, QualType T); 856 857 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 858 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 859 QualType BuildUnaryTransformType(QualType BaseType, 860 UnaryTransformType::UTTKind UKind, 861 SourceLocation Loc); 862 863 //===--------------------------------------------------------------------===// 864 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 865 // 866 867 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 868 869 void DiagnoseUseOfUnimplementedSelectors(); 870 871 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 872 Scope *S, CXXScopeSpec *SS = 0, 873 bool isClassName = false, 874 bool HasTrailingDot = false, 875 ParsedType ObjectType = ParsedType(), 876 bool WantNontrivialTypeSourceInfo = false, 877 IdentifierInfo **CorrectedII = 0); 878 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 879 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 880 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 881 SourceLocation IILoc, 882 Scope *S, 883 CXXScopeSpec *SS, 884 ParsedType &SuggestedType); 885 886 /// \brief Describes the result of the name lookup and resolution performed 887 /// by \c ClassifyName(). 888 enum NameClassificationKind { 889 NC_Unknown, 890 NC_Error, 891 NC_Keyword, 892 NC_Type, 893 NC_Expression, 894 NC_NestedNameSpecifier, 895 NC_TypeTemplate, 896 NC_FunctionTemplate 897 }; 898 899 class NameClassification { 900 NameClassificationKind Kind; 901 ExprResult Expr; 902 TemplateName Template; 903 ParsedType Type; 904 const IdentifierInfo *Keyword; 905 906 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 907 908 public: 909 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 910 911 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 912 913 NameClassification(const IdentifierInfo *Keyword) 914 : Kind(NC_Keyword), Keyword(Keyword) { } 915 916 static NameClassification Error() { 917 return NameClassification(NC_Error); 918 } 919 920 static NameClassification Unknown() { 921 return NameClassification(NC_Unknown); 922 } 923 924 static NameClassification NestedNameSpecifier() { 925 return NameClassification(NC_NestedNameSpecifier); 926 } 927 928 static NameClassification TypeTemplate(TemplateName Name) { 929 NameClassification Result(NC_TypeTemplate); 930 Result.Template = Name; 931 return Result; 932 } 933 934 static NameClassification FunctionTemplate(TemplateName Name) { 935 NameClassification Result(NC_FunctionTemplate); 936 Result.Template = Name; 937 return Result; 938 } 939 940 NameClassificationKind getKind() const { return Kind; } 941 942 ParsedType getType() const { 943 assert(Kind == NC_Type); 944 return Type; 945 } 946 947 ExprResult getExpression() const { 948 assert(Kind == NC_Expression); 949 return Expr; 950 } 951 952 TemplateName getTemplateName() const { 953 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 954 return Template; 955 } 956 957 TemplateNameKind getTemplateNameKind() const { 958 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 959 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 960 } 961}; 962 963 /// \brief Perform name lookup on the given name, classifying it based on 964 /// the results of name lookup and the following token. 965 /// 966 /// This routine is used by the parser to resolve identifiers and help direct 967 /// parsing. When the identifier cannot be found, this routine will attempt 968 /// to correct the typo and classify based on the resulting name. 969 /// 970 /// \param S The scope in which we're performing name lookup. 971 /// 972 /// \param SS The nested-name-specifier that precedes the name. 973 /// 974 /// \param Name The identifier. If typo correction finds an alternative name, 975 /// this pointer parameter will be updated accordingly. 976 /// 977 /// \param NameLoc The location of the identifier. 978 /// 979 /// \param NextToken The token following the identifier. Used to help 980 /// disambiguate the name. 981 NameClassification ClassifyName(Scope *S, 982 CXXScopeSpec &SS, 983 IdentifierInfo *&Name, 984 SourceLocation NameLoc, 985 const Token &NextToken); 986 987 Decl *ActOnDeclarator(Scope *S, Declarator &D); 988 989 Decl *HandleDeclarator(Scope *S, Declarator &D, 990 MultiTemplateParamsArg TemplateParameterLists); 991 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 992 const LookupResult &Previous, 993 Scope *S); 994 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 995 void DiagnoseFunctionSpecifiers(Declarator& D); 996 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 997 void CheckShadow(Scope *S, VarDecl *D); 998 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 999 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1000 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1001 TypeSourceInfo *TInfo, 1002 LookupResult &Previous); 1003 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1004 LookupResult &Previous, bool &Redeclaration); 1005 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1006 TypeSourceInfo *TInfo, 1007 LookupResult &Previous, 1008 MultiTemplateParamsArg TemplateParamLists); 1009 // Returns true if the variable declaration is a redeclaration 1010 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1011 void CheckCompleteVariableDeclaration(VarDecl *var); 1012 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1013 TypeSourceInfo *TInfo, 1014 LookupResult &Previous, 1015 MultiTemplateParamsArg TemplateParamLists, 1016 bool &AddToScope); 1017 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1018 1019 /// \brief The kind of constexpr declaration checking we are performing. 1020 /// 1021 /// The kind affects which diagnostics (if any) are emitted if the function 1022 /// does not satisfy the requirements of a constexpr function declaration. 1023 enum CheckConstexprKind { 1024 /// \brief Check a constexpr function declaration, and produce errors if it 1025 /// does not satisfy the requirements. 1026 CCK_Declaration, 1027 /// \brief Check a constexpr function template instantiation. 1028 CCK_Instantiation, 1029 /// \brief Produce notes explaining why an instantiation was not constexpr. 1030 CCK_NoteNonConstexprInstantiation 1031 }; 1032 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, CheckConstexprKind CCK); 1033 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1034 1035 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1036 // Returns true if the function declaration is a redeclaration 1037 bool CheckFunctionDeclaration(Scope *S, 1038 FunctionDecl *NewFD, LookupResult &Previous, 1039 bool IsExplicitSpecialization); 1040 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1041 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1042 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1043 SourceLocation Loc, 1044 QualType T); 1045 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1046 SourceLocation NameLoc, IdentifierInfo *Name, 1047 QualType T, TypeSourceInfo *TSInfo, 1048 StorageClass SC, StorageClass SCAsWritten); 1049 void ActOnParamDefaultArgument(Decl *param, 1050 SourceLocation EqualLoc, 1051 Expr *defarg); 1052 void ActOnParamUnparsedDefaultArgument(Decl *param, 1053 SourceLocation EqualLoc, 1054 SourceLocation ArgLoc); 1055 void ActOnParamDefaultArgumentError(Decl *param); 1056 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1057 SourceLocation EqualLoc); 1058 1059 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1060 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1061 bool TypeMayContainAuto); 1062 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1063 void ActOnInitializerError(Decl *Dcl); 1064 void ActOnCXXForRangeDecl(Decl *D); 1065 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1066 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1067 void FinalizeDeclaration(Decl *D); 1068 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1069 Decl **Group, 1070 unsigned NumDecls); 1071 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1072 bool TypeMayContainAuto = true); 1073 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1074 SourceLocation LocAfterDecls); 1075 void CheckForFunctionRedefinition(FunctionDecl *FD); 1076 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1077 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1078 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1079 1080 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1081 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1082 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1083 1084 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1085 /// attribute for which parsing is delayed. 1086 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1087 1088 /// \brief Diagnose any unused parameters in the given sequence of 1089 /// ParmVarDecl pointers. 1090 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1091 ParmVarDecl * const *End); 1092 1093 /// \brief Diagnose whether the size of parameters or return value of a 1094 /// function or obj-c method definition is pass-by-value and larger than a 1095 /// specified threshold. 1096 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1097 ParmVarDecl * const *End, 1098 QualType ReturnTy, 1099 NamedDecl *D); 1100 1101 void DiagnoseInvalidJumps(Stmt *Body); 1102 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1103 SourceLocation AsmLoc, 1104 SourceLocation RParenLoc); 1105 1106 /// \brief The parser has processed a module import declaration. 1107 /// 1108 /// \param ImportLoc The location of the '__import_module__' keyword. 1109 /// 1110 /// \param ModuleName The name of the module. 1111 /// 1112 /// \param ModuleNameLoc The location of the module name. 1113 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1114 IdentifierInfo &ModuleName, 1115 SourceLocation ModuleNameLoc); 1116 1117 /// \brief Diagnose that \p New is a module-private redeclaration of 1118 /// \p Old. 1119 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1120 SourceLocation ModulePrivateKeyword 1121 = SourceLocation()); 1122 1123 /// \brief Retrieve a suitable printing policy. 1124 PrintingPolicy getPrintingPolicy() const; 1125 1126 /// Scope actions. 1127 void ActOnPopScope(SourceLocation Loc, Scope *S); 1128 void ActOnTranslationUnitScope(Scope *S); 1129 1130 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1131 DeclSpec &DS); 1132 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1133 DeclSpec &DS, 1134 MultiTemplateParamsArg TemplateParams); 1135 1136 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1137 1138 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1139 AccessSpecifier AS, 1140 RecordDecl *Record); 1141 1142 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1143 RecordDecl *Record); 1144 1145 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1146 TagTypeKind NewTag, bool isDefinition, 1147 SourceLocation NewTagLoc, 1148 const IdentifierInfo &Name); 1149 1150 enum TagUseKind { 1151 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1152 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1153 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1154 TUK_Friend // Friend declaration: 'friend struct foo;' 1155 }; 1156 1157 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1158 SourceLocation KWLoc, CXXScopeSpec &SS, 1159 IdentifierInfo *Name, SourceLocation NameLoc, 1160 AttributeList *Attr, AccessSpecifier AS, 1161 SourceLocation ModulePrivateLoc, 1162 MultiTemplateParamsArg TemplateParameterLists, 1163 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1164 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1165 1166 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1167 unsigned TagSpec, SourceLocation TagLoc, 1168 CXXScopeSpec &SS, 1169 IdentifierInfo *Name, SourceLocation NameLoc, 1170 AttributeList *Attr, 1171 MultiTemplateParamsArg TempParamLists); 1172 1173 TypeResult ActOnDependentTag(Scope *S, 1174 unsigned TagSpec, 1175 TagUseKind TUK, 1176 const CXXScopeSpec &SS, 1177 IdentifierInfo *Name, 1178 SourceLocation TagLoc, 1179 SourceLocation NameLoc); 1180 1181 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1182 IdentifierInfo *ClassName, 1183 SmallVectorImpl<Decl *> &Decls); 1184 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1185 Declarator &D, Expr *BitfieldWidth); 1186 1187 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1188 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1189 AccessSpecifier AS); 1190 1191 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1192 TypeSourceInfo *TInfo, 1193 RecordDecl *Record, SourceLocation Loc, 1194 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1195 SourceLocation TSSL, 1196 AccessSpecifier AS, NamedDecl *PrevDecl, 1197 Declarator *D = 0); 1198 1199 enum CXXSpecialMember { 1200 CXXDefaultConstructor, 1201 CXXCopyConstructor, 1202 CXXMoveConstructor, 1203 CXXCopyAssignment, 1204 CXXMoveAssignment, 1205 CXXDestructor, 1206 CXXInvalid 1207 }; 1208 bool CheckNontrivialField(FieldDecl *FD); 1209 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1210 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1211 void ActOnLastBitfield(SourceLocation DeclStart, 1212 SmallVectorImpl<Decl *> &AllIvarDecls); 1213 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1214 Declarator &D, Expr *BitfieldWidth, 1215 tok::ObjCKeywordKind visibility); 1216 1217 // This is used for both record definitions and ObjC interface declarations. 1218 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1219 llvm::ArrayRef<Decl *> Fields, 1220 SourceLocation LBrac, SourceLocation RBrac, 1221 AttributeList *AttrList); 1222 1223 /// ActOnTagStartDefinition - Invoked when we have entered the 1224 /// scope of a tag's definition (e.g., for an enumeration, class, 1225 /// struct, or union). 1226 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1227 1228 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1229 1230 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1231 /// C++ record definition's base-specifiers clause and are starting its 1232 /// member declarations. 1233 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1234 SourceLocation FinalLoc, 1235 SourceLocation LBraceLoc); 1236 1237 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1238 /// the definition of a tag (enumeration, class, struct, or union). 1239 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1240 SourceLocation RBraceLoc); 1241 1242 void ActOnObjCContainerFinishDefinition(); 1243 1244 /// \brief Invoked when we must temporarily exit the objective-c container 1245 /// scope for parsing/looking-up C constructs. 1246 /// 1247 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1248 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1249 void ActOnObjCReenterContainerContext(DeclContext *DC); 1250 1251 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1252 /// error parsing the definition of a tag. 1253 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1254 1255 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1256 EnumConstantDecl *LastEnumConst, 1257 SourceLocation IdLoc, 1258 IdentifierInfo *Id, 1259 Expr *val); 1260 1261 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1262 SourceLocation IdLoc, IdentifierInfo *Id, 1263 AttributeList *Attrs, 1264 SourceLocation EqualLoc, Expr *Val); 1265 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1266 SourceLocation RBraceLoc, Decl *EnumDecl, 1267 Decl **Elements, unsigned NumElements, 1268 Scope *S, AttributeList *Attr); 1269 1270 DeclContext *getContainingDC(DeclContext *DC); 1271 1272 /// Set the current declaration context until it gets popped. 1273 void PushDeclContext(Scope *S, DeclContext *DC); 1274 void PopDeclContext(); 1275 1276 /// EnterDeclaratorContext - Used when we must lookup names in the context 1277 /// of a declarator's nested name specifier. 1278 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1279 void ExitDeclaratorContext(Scope *S); 1280 1281 /// Push the parameters of D, which must be a function, into scope. 1282 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1283 void ActOnExitFunctionContext() { PopDeclContext(); } 1284 1285 DeclContext *getFunctionLevelDeclContext(); 1286 1287 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1288 /// to the function decl for the function being parsed. If we're currently 1289 /// in a 'block', this returns the containing context. 1290 FunctionDecl *getCurFunctionDecl(); 1291 1292 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1293 /// the method decl for the method being parsed. If we're currently 1294 /// in a 'block', this returns the containing context. 1295 ObjCMethodDecl *getCurMethodDecl(); 1296 1297 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1298 /// or C function we're in, otherwise return null. If we're currently 1299 /// in a 'block', this returns the containing context. 1300 NamedDecl *getCurFunctionOrMethodDecl(); 1301 1302 /// Add this decl to the scope shadowed decl chains. 1303 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1304 1305 /// \brief Make the given externally-produced declaration visible at the 1306 /// top level scope. 1307 /// 1308 /// \param D The externally-produced declaration to push. 1309 /// 1310 /// \param Name The name of the externally-produced declaration. 1311 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1312 1313 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1314 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1315 /// true if 'D' belongs to the given declaration context. 1316 /// 1317 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1318 /// whether the declaration is in scope for the purposes of explicit template 1319 /// instantiation or specialization. The default is false. 1320 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1321 bool ExplicitInstantiationOrSpecialization = false); 1322 1323 /// Finds the scope corresponding to the given decl context, if it 1324 /// happens to be an enclosing scope. Otherwise return NULL. 1325 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1326 1327 /// Subroutines of ActOnDeclarator(). 1328 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1329 TypeSourceInfo *TInfo); 1330 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1331 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1332 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1333 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1334 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1335 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1336 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1337 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1338 1339 // AssignmentAction - This is used by all the assignment diagnostic functions 1340 // to represent what is actually causing the operation 1341 enum AssignmentAction { 1342 AA_Assigning, 1343 AA_Passing, 1344 AA_Returning, 1345 AA_Converting, 1346 AA_Initializing, 1347 AA_Sending, 1348 AA_Casting 1349 }; 1350 1351 /// C++ Overloading. 1352 enum OverloadKind { 1353 /// This is a legitimate overload: the existing declarations are 1354 /// functions or function templates with different signatures. 1355 Ovl_Overload, 1356 1357 /// This is not an overload because the signature exactly matches 1358 /// an existing declaration. 1359 Ovl_Match, 1360 1361 /// This is not an overload because the lookup results contain a 1362 /// non-function. 1363 Ovl_NonFunction 1364 }; 1365 OverloadKind CheckOverload(Scope *S, 1366 FunctionDecl *New, 1367 const LookupResult &OldDecls, 1368 NamedDecl *&OldDecl, 1369 bool IsForUsingDecl); 1370 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1371 1372 /// \brief Checks availability of the function depending on the current 1373 /// function context.Inside an unavailable function,unavailability is ignored. 1374 /// 1375 /// \returns true if \arg FD is unavailable and current context is inside 1376 /// an available function, false otherwise. 1377 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1378 1379 ImplicitConversionSequence 1380 TryImplicitConversion(Expr *From, QualType ToType, 1381 bool SuppressUserConversions, 1382 bool AllowExplicit, 1383 bool InOverloadResolution, 1384 bool CStyle, 1385 bool AllowObjCWritebackConversion); 1386 1387 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1388 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1389 bool IsComplexPromotion(QualType FromType, QualType ToType); 1390 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1391 bool InOverloadResolution, 1392 QualType& ConvertedType, bool &IncompatibleObjC); 1393 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1394 QualType& ConvertedType, bool &IncompatibleObjC); 1395 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1396 QualType &ConvertedType); 1397 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1398 QualType& ConvertedType); 1399 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1400 const FunctionProtoType *NewType); 1401 1402 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1403 bool CheckPointerConversion(Expr *From, QualType ToType, 1404 CastKind &Kind, 1405 CXXCastPath& BasePath, 1406 bool IgnoreBaseAccess); 1407 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1408 bool InOverloadResolution, 1409 QualType &ConvertedType); 1410 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1411 CastKind &Kind, 1412 CXXCastPath &BasePath, 1413 bool IgnoreBaseAccess); 1414 bool IsQualificationConversion(QualType FromType, QualType ToType, 1415 bool CStyle, bool &ObjCLifetimeConversion); 1416 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1417 QualType &ResultTy); 1418 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1419 1420 1421 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1422 const VarDecl *NRVOCandidate, 1423 QualType ResultType, 1424 Expr *Value, 1425 bool AllowNRVO = true); 1426 1427 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1428 ExprResult Init); 1429 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1430 SourceLocation EqualLoc, 1431 ExprResult Init, 1432 bool TopLevelOfInitList = false); 1433 ExprResult PerformObjectArgumentInitialization(Expr *From, 1434 NestedNameSpecifier *Qualifier, 1435 NamedDecl *FoundDecl, 1436 CXXMethodDecl *Method); 1437 1438 ExprResult PerformContextuallyConvertToBool(Expr *From); 1439 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1440 1441 ExprResult 1442 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1443 const PartialDiagnostic &NotIntDiag, 1444 const PartialDiagnostic &IncompleteDiag, 1445 const PartialDiagnostic &ExplicitConvDiag, 1446 const PartialDiagnostic &ExplicitConvNote, 1447 const PartialDiagnostic &AmbigDiag, 1448 const PartialDiagnostic &AmbigNote, 1449 const PartialDiagnostic &ConvDiag); 1450 1451 ExprResult PerformObjectMemberConversion(Expr *From, 1452 NestedNameSpecifier *Qualifier, 1453 NamedDecl *FoundDecl, 1454 NamedDecl *Member); 1455 1456 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1457 // TODO: make this is a typesafe union. 1458 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1459 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1460 1461 void AddOverloadCandidate(NamedDecl *Function, 1462 DeclAccessPair FoundDecl, 1463 Expr **Args, unsigned NumArgs, 1464 OverloadCandidateSet &CandidateSet); 1465 1466 void AddOverloadCandidate(FunctionDecl *Function, 1467 DeclAccessPair FoundDecl, 1468 Expr **Args, unsigned NumArgs, 1469 OverloadCandidateSet& CandidateSet, 1470 bool SuppressUserConversions = false, 1471 bool PartialOverloading = false); 1472 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1473 Expr **Args, unsigned NumArgs, 1474 OverloadCandidateSet& CandidateSet, 1475 bool SuppressUserConversions = false); 1476 void AddMethodCandidate(DeclAccessPair FoundDecl, 1477 QualType ObjectType, 1478 Expr::Classification ObjectClassification, 1479 Expr **Args, unsigned NumArgs, 1480 OverloadCandidateSet& CandidateSet, 1481 bool SuppressUserConversion = false); 1482 void AddMethodCandidate(CXXMethodDecl *Method, 1483 DeclAccessPair FoundDecl, 1484 CXXRecordDecl *ActingContext, QualType ObjectType, 1485 Expr::Classification ObjectClassification, 1486 Expr **Args, unsigned NumArgs, 1487 OverloadCandidateSet& CandidateSet, 1488 bool SuppressUserConversions = false); 1489 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1490 DeclAccessPair FoundDecl, 1491 CXXRecordDecl *ActingContext, 1492 TemplateArgumentListInfo *ExplicitTemplateArgs, 1493 QualType ObjectType, 1494 Expr::Classification ObjectClassification, 1495 Expr **Args, unsigned NumArgs, 1496 OverloadCandidateSet& CandidateSet, 1497 bool SuppressUserConversions = false); 1498 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1499 DeclAccessPair FoundDecl, 1500 TemplateArgumentListInfo *ExplicitTemplateArgs, 1501 Expr **Args, unsigned NumArgs, 1502 OverloadCandidateSet& CandidateSet, 1503 bool SuppressUserConversions = false); 1504 void AddConversionCandidate(CXXConversionDecl *Conversion, 1505 DeclAccessPair FoundDecl, 1506 CXXRecordDecl *ActingContext, 1507 Expr *From, QualType ToType, 1508 OverloadCandidateSet& CandidateSet); 1509 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1510 DeclAccessPair FoundDecl, 1511 CXXRecordDecl *ActingContext, 1512 Expr *From, QualType ToType, 1513 OverloadCandidateSet &CandidateSet); 1514 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1515 DeclAccessPair FoundDecl, 1516 CXXRecordDecl *ActingContext, 1517 const FunctionProtoType *Proto, 1518 Expr *Object, Expr **Args, unsigned NumArgs, 1519 OverloadCandidateSet& CandidateSet); 1520 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1521 SourceLocation OpLoc, 1522 Expr **Args, unsigned NumArgs, 1523 OverloadCandidateSet& CandidateSet, 1524 SourceRange OpRange = SourceRange()); 1525 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1526 Expr **Args, unsigned NumArgs, 1527 OverloadCandidateSet& CandidateSet, 1528 bool IsAssignmentOperator = false, 1529 unsigned NumContextualBoolArguments = 0); 1530 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1531 SourceLocation OpLoc, 1532 Expr **Args, unsigned NumArgs, 1533 OverloadCandidateSet& CandidateSet); 1534 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1535 bool Operator, 1536 Expr **Args, unsigned NumArgs, 1537 TemplateArgumentListInfo *ExplicitTemplateArgs, 1538 OverloadCandidateSet& CandidateSet, 1539 bool PartialOverloading = false, 1540 bool StdNamespaceIsAssociated = false); 1541 1542 // Emit as a 'note' the specific overload candidate 1543 void NoteOverloadCandidate(FunctionDecl *Fn); 1544 1545 // Emit as a series of 'note's all template and non-templates 1546 // identified by the expression Expr 1547 void NoteAllOverloadCandidates(Expr* E); 1548 1549 // [PossiblyAFunctionType] --> [Return] 1550 // NonFunctionType --> NonFunctionType 1551 // R (A) --> R(A) 1552 // R (*)(A) --> R (A) 1553 // R (&)(A) --> R (A) 1554 // R (S::*)(A) --> R (A) 1555 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1556 1557 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1558 bool Complain, 1559 DeclAccessPair &Found); 1560 1561 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1562 bool Complain = false, 1563 DeclAccessPair* Found = 0); 1564 1565 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1566 ExprResult &SrcExpr, 1567 bool DoFunctionPointerConverion = false, 1568 bool Complain = false, 1569 const SourceRange& OpRangeForComplaining = SourceRange(), 1570 QualType DestTypeForComplaining = QualType(), 1571 unsigned DiagIDForComplaining = 0); 1572 1573 1574 Expr *FixOverloadedFunctionReference(Expr *E, 1575 DeclAccessPair FoundDecl, 1576 FunctionDecl *Fn); 1577 ExprResult FixOverloadedFunctionReference(ExprResult, 1578 DeclAccessPair FoundDecl, 1579 FunctionDecl *Fn); 1580 1581 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1582 Expr **Args, unsigned NumArgs, 1583 OverloadCandidateSet &CandidateSet, 1584 bool PartialOverloading = false); 1585 1586 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1587 UnresolvedLookupExpr *ULE, 1588 SourceLocation LParenLoc, 1589 Expr **Args, unsigned NumArgs, 1590 SourceLocation RParenLoc, 1591 Expr *ExecConfig); 1592 1593 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1594 unsigned Opc, 1595 const UnresolvedSetImpl &Fns, 1596 Expr *input); 1597 1598 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1599 unsigned Opc, 1600 const UnresolvedSetImpl &Fns, 1601 Expr *LHS, Expr *RHS); 1602 1603 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1604 SourceLocation RLoc, 1605 Expr *Base,Expr *Idx); 1606 1607 ExprResult 1608 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1609 SourceLocation LParenLoc, Expr **Args, 1610 unsigned NumArgs, SourceLocation RParenLoc); 1611 ExprResult 1612 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1613 Expr **Args, unsigned NumArgs, 1614 SourceLocation RParenLoc); 1615 1616 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1617 SourceLocation OpLoc); 1618 1619 /// CheckCallReturnType - Checks that a call expression's return type is 1620 /// complete. Returns true on failure. The location passed in is the location 1621 /// that best represents the call. 1622 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1623 CallExpr *CE, FunctionDecl *FD); 1624 1625 /// Helpers for dealing with blocks and functions. 1626 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1627 bool CheckParameterNames); 1628 void CheckCXXDefaultArguments(FunctionDecl *FD); 1629 void CheckExtraCXXDefaultArguments(Declarator &D); 1630 Scope *getNonFieldDeclScope(Scope *S); 1631 1632 /// \name Name lookup 1633 /// 1634 /// These routines provide name lookup that is used during semantic 1635 /// analysis to resolve the various kinds of names (identifiers, 1636 /// overloaded operator names, constructor names, etc.) into zero or 1637 /// more declarations within a particular scope. The major entry 1638 /// points are LookupName, which performs unqualified name lookup, 1639 /// and LookupQualifiedName, which performs qualified name lookup. 1640 /// 1641 /// All name lookup is performed based on some specific criteria, 1642 /// which specify what names will be visible to name lookup and how 1643 /// far name lookup should work. These criteria are important both 1644 /// for capturing language semantics (certain lookups will ignore 1645 /// certain names, for example) and for performance, since name 1646 /// lookup is often a bottleneck in the compilation of C++. Name 1647 /// lookup criteria is specified via the LookupCriteria enumeration. 1648 /// 1649 /// The results of name lookup can vary based on the kind of name 1650 /// lookup performed, the current language, and the translation 1651 /// unit. In C, for example, name lookup will either return nothing 1652 /// (no entity found) or a single declaration. In C++, name lookup 1653 /// can additionally refer to a set of overloaded functions or 1654 /// result in an ambiguity. All of the possible results of name 1655 /// lookup are captured by the LookupResult class, which provides 1656 /// the ability to distinguish among them. 1657 //@{ 1658 1659 /// @brief Describes the kind of name lookup to perform. 1660 enum LookupNameKind { 1661 /// Ordinary name lookup, which finds ordinary names (functions, 1662 /// variables, typedefs, etc.) in C and most kinds of names 1663 /// (functions, variables, members, types, etc.) in C++. 1664 LookupOrdinaryName = 0, 1665 /// Tag name lookup, which finds the names of enums, classes, 1666 /// structs, and unions. 1667 LookupTagName, 1668 /// Label name lookup. 1669 LookupLabel, 1670 /// Member name lookup, which finds the names of 1671 /// class/struct/union members. 1672 LookupMemberName, 1673 /// Look up of an operator name (e.g., operator+) for use with 1674 /// operator overloading. This lookup is similar to ordinary name 1675 /// lookup, but will ignore any declarations that are class members. 1676 LookupOperatorName, 1677 /// Look up of a name that precedes the '::' scope resolution 1678 /// operator in C++. This lookup completely ignores operator, object, 1679 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1680 LookupNestedNameSpecifierName, 1681 /// Look up a namespace name within a C++ using directive or 1682 /// namespace alias definition, ignoring non-namespace names (C++ 1683 /// [basic.lookup.udir]p1). 1684 LookupNamespaceName, 1685 /// Look up all declarations in a scope with the given name, 1686 /// including resolved using declarations. This is appropriate 1687 /// for checking redeclarations for a using declaration. 1688 LookupUsingDeclName, 1689 /// Look up an ordinary name that is going to be redeclared as a 1690 /// name with linkage. This lookup ignores any declarations that 1691 /// are outside of the current scope unless they have linkage. See 1692 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1693 LookupRedeclarationWithLinkage, 1694 /// Look up the name of an Objective-C protocol. 1695 LookupObjCProtocolName, 1696 /// Look up implicit 'self' parameter of an objective-c method. 1697 LookupObjCImplicitSelfParam, 1698 /// \brief Look up any declaration with any name. 1699 LookupAnyName 1700 }; 1701 1702 /// \brief Specifies whether (or how) name lookup is being performed for a 1703 /// redeclaration (vs. a reference). 1704 enum RedeclarationKind { 1705 /// \brief The lookup is a reference to this name that is not for the 1706 /// purpose of redeclaring the name. 1707 NotForRedeclaration = 0, 1708 /// \brief The lookup results will be used for redeclaration of a name, 1709 /// if an entity by that name already exists. 1710 ForRedeclaration 1711 }; 1712 1713private: 1714 bool CppLookupName(LookupResult &R, Scope *S); 1715 1716 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1717 CXXSpecialMember SM, 1718 bool ConstArg, 1719 bool VolatileArg, 1720 bool RValueThis, 1721 bool ConstThis, 1722 bool VolatileThis); 1723 1724 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1725 // 1726 // The boolean value will be true to indicate that the namespace was loaded 1727 // from an AST/PCH file, or false otherwise. 1728 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1729 1730 /// \brief Whether we have already loaded known namespaces from an extenal 1731 /// source. 1732 bool LoadedExternalKnownNamespaces; 1733 1734public: 1735 /// \brief Look up a name, looking for a single declaration. Return 1736 /// null if the results were absent, ambiguous, or overloaded. 1737 /// 1738 /// It is preferable to use the elaborated form and explicitly handle 1739 /// ambiguity and overloaded. 1740 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1741 SourceLocation Loc, 1742 LookupNameKind NameKind, 1743 RedeclarationKind Redecl 1744 = NotForRedeclaration); 1745 bool LookupName(LookupResult &R, Scope *S, 1746 bool AllowBuiltinCreation = false); 1747 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1748 bool InUnqualifiedLookup = false); 1749 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1750 bool AllowBuiltinCreation = false, 1751 bool EnteringContext = false); 1752 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1753 1754 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1755 QualType T1, QualType T2, 1756 UnresolvedSetImpl &Functions); 1757 1758 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1759 SourceLocation GnuLabelLoc = SourceLocation()); 1760 1761 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1762 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1763 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1764 unsigned Quals, 1765 bool *ConstParam = 0); 1766 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1767 bool RValueThis, unsigned ThisQuals, 1768 bool *ConstParam = 0); 1769 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1770 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1771 unsigned ThisQuals); 1772 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1773 1774 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1775 Expr **Args, unsigned NumArgs, 1776 ADLResult &Functions, 1777 bool StdNamespaceIsAssociated = false); 1778 1779 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1780 VisibleDeclConsumer &Consumer, 1781 bool IncludeGlobalScope = true); 1782 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1783 VisibleDeclConsumer &Consumer, 1784 bool IncludeGlobalScope = true); 1785 1786 /// \brief The context in which typo-correction occurs. 1787 /// 1788 /// The typo-correction context affects which keywords (if any) are 1789 /// considered when trying to correct for typos. 1790 enum CorrectTypoContext { 1791 /// \brief An unknown context, where any keyword might be valid. 1792 CTC_Unknown, 1793 /// \brief A context where no keywords are used (e.g. we expect an actual 1794 /// name). 1795 CTC_NoKeywords, 1796 /// \brief A context where we're correcting a type name. 1797 CTC_Type, 1798 /// \brief An expression context. 1799 CTC_Expression, 1800 /// \brief A type cast, or anything else that can be followed by a '<'. 1801 CTC_CXXCasts, 1802 /// \brief A member lookup context. 1803 CTC_MemberLookup, 1804 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1805 CTC_ObjCIvarLookup, 1806 /// \brief An Objective-C property lookup context (e.g., self.prop). 1807 CTC_ObjCPropertyLookup, 1808 /// \brief The receiver of an Objective-C message send within an 1809 /// Objective-C method where 'super' is a valid keyword. 1810 CTC_ObjCMessageReceiver 1811 }; 1812 1813 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1814 Sema::LookupNameKind LookupKind, 1815 Scope *S, CXXScopeSpec *SS, 1816 DeclContext *MemberContext = NULL, 1817 bool EnteringContext = false, 1818 CorrectTypoContext CTC = CTC_Unknown, 1819 const ObjCObjectPointerType *OPT = NULL); 1820 1821 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1822 AssociatedNamespaceSet &AssociatedNamespaces, 1823 AssociatedClassSet &AssociatedClasses); 1824 1825 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1826 bool ConsiderLinkage, 1827 bool ExplicitInstantiationOrSpecialization); 1828 1829 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1830 //@} 1831 1832 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1833 SourceLocation IdLoc, 1834 bool TypoCorrection = false); 1835 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1836 Scope *S, bool ForRedeclaration, 1837 SourceLocation Loc); 1838 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1839 Scope *S); 1840 void AddKnownFunctionAttributes(FunctionDecl *FD); 1841 1842 // More parsing and symbol table subroutines. 1843 1844 // Decl attributes - this routine is the top level dispatcher. 1845 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1846 bool NonInheritable = true, bool Inheritable = true); 1847 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1848 bool NonInheritable = true, bool Inheritable = true); 1849 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1850 const AttributeList *AttrList); 1851 1852 void checkUnusedDeclAttributes(Declarator &D); 1853 1854 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1855 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1856 bool CheckNoReturnAttr(const AttributeList &attr); 1857 1858 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1859 bool &IncompleteImpl, unsigned DiagID); 1860 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1861 ObjCMethodDecl *MethodDecl, 1862 bool IsProtocolMethodDecl); 1863 1864 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1865 ObjCMethodDecl *Overridden, 1866 bool IsProtocolMethodDecl); 1867 1868 /// WarnExactTypedMethods - This routine issues a warning if method 1869 /// implementation declaration matches exactly that of its declaration. 1870 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1871 ObjCMethodDecl *MethodDecl, 1872 bool IsProtocolMethodDecl); 1873 1874 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1875 ObjCInterfaceDecl *IDecl); 1876 1877 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1878 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1879 1880 /// CheckProtocolMethodDefs - This routine checks unimplemented 1881 /// methods declared in protocol, and those referenced by it. 1882 /// \param IDecl - Used for checking for methods which may have been 1883 /// inherited. 1884 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1885 ObjCProtocolDecl *PDecl, 1886 bool& IncompleteImpl, 1887 const SelectorSet &InsMap, 1888 const SelectorSet &ClsMap, 1889 ObjCContainerDecl *CDecl); 1890 1891 /// CheckImplementationIvars - This routine checks if the instance variables 1892 /// listed in the implelementation match those listed in the interface. 1893 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1894 ObjCIvarDecl **Fields, unsigned nIvars, 1895 SourceLocation Loc); 1896 1897 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1898 /// remains unimplemented in the class or category @implementation. 1899 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1900 ObjCContainerDecl* IDecl, 1901 bool IncompleteImpl = false); 1902 1903 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1904 /// which must be implemented by this implementation. 1905 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1906 ObjCContainerDecl *CDecl, 1907 const SelectorSet &InsMap); 1908 1909 /// DefaultSynthesizeProperties - This routine default synthesizes all 1910 /// properties which must be synthesized in class's @implementation. 1911 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1912 ObjCInterfaceDecl *IDecl); 1913 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1914 1915 /// CollectImmediateProperties - This routine collects all properties in 1916 /// the class and its conforming protocols; but not those it its super class. 1917 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1918 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1919 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1920 1921 1922 /// LookupPropertyDecl - Looks up a property in the current class and all 1923 /// its protocols. 1924 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1925 IdentifierInfo *II); 1926 1927 /// Called by ActOnProperty to handle @property declarations in 1928 //// class extensions. 1929 Decl *HandlePropertyInClassExtension(Scope *S, 1930 SourceLocation AtLoc, 1931 FieldDeclarator &FD, 1932 Selector GetterSel, 1933 Selector SetterSel, 1934 const bool isAssign, 1935 const bool isReadWrite, 1936 const unsigned Attributes, 1937 const unsigned AttributesAsWritten, 1938 bool *isOverridingProperty, 1939 TypeSourceInfo *T, 1940 tok::ObjCKeywordKind MethodImplKind); 1941 1942 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1943 /// handle creating the ObjcPropertyDecl for a category or @interface. 1944 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1945 ObjCContainerDecl *CDecl, 1946 SourceLocation AtLoc, 1947 FieldDeclarator &FD, 1948 Selector GetterSel, 1949 Selector SetterSel, 1950 const bool isAssign, 1951 const bool isReadWrite, 1952 const unsigned Attributes, 1953 const unsigned AttributesAsWritten, 1954 TypeSourceInfo *T, 1955 tok::ObjCKeywordKind MethodImplKind, 1956 DeclContext *lexicalDC = 0); 1957 1958 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1959 /// warning) when atomic property has one but not the other user-declared 1960 /// setter or getter. 1961 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1962 ObjCContainerDecl* IDecl); 1963 1964 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1965 1966 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1967 1968 enum MethodMatchStrategy { 1969 MMS_loose, 1970 MMS_strict 1971 }; 1972 1973 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1974 /// true, or false, accordingly. 1975 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1976 const ObjCMethodDecl *PrevMethod, 1977 MethodMatchStrategy strategy = MMS_strict); 1978 1979 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1980 /// or protocol against those declared in their implementations. 1981 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1982 const SelectorSet &ClsMap, 1983 SelectorSet &InsMapSeen, 1984 SelectorSet &ClsMapSeen, 1985 ObjCImplDecl* IMPDecl, 1986 ObjCContainerDecl* IDecl, 1987 bool &IncompleteImpl, 1988 bool ImmediateClass, 1989 bool WarnExactMatch=false); 1990 1991 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1992 /// category matches with those implemented in its primary class and 1993 /// warns each time an exact match is found. 1994 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1995 1996private: 1997 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1998 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1999 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2000 2001 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2002 /// optionally warns if there are multiple signatures. 2003 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2004 bool receiverIdOrClass, 2005 bool warn, bool instance); 2006 2007public: 2008 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2009 /// unit are added to a global pool. This allows us to efficiently associate 2010 /// a selector with a method declaraation for purposes of typechecking 2011 /// messages sent to "id" (where the class of the object is unknown). 2012 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2013 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2014 } 2015 2016 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2017 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2018 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2019 } 2020 2021 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2022 /// pool. 2023 void AddAnyMethodToGlobalPool(Decl *D); 2024 2025 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2026 /// there are multiple signatures. 2027 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2028 bool receiverIdOrClass=false, 2029 bool warn=true) { 2030 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2031 warn, /*instance*/true); 2032 } 2033 2034 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2035 /// there are multiple signatures. 2036 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2037 bool receiverIdOrClass=false, 2038 bool warn=true) { 2039 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2040 warn, /*instance*/false); 2041 } 2042 2043 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2044 /// implementation. 2045 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2046 2047 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2048 /// initialization. 2049 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2050 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2051 2052 //===--------------------------------------------------------------------===// 2053 // Statement Parsing Callbacks: SemaStmt.cpp. 2054public: 2055 class FullExprArg { 2056 public: 2057 FullExprArg(Sema &actions) : E(0) { } 2058 2059 // FIXME: The const_cast here is ugly. RValue references would make this 2060 // much nicer (or we could duplicate a bunch of the move semantics 2061 // emulation code from Ownership.h). 2062 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2063 2064 ExprResult release() { 2065 return move(E); 2066 } 2067 2068 Expr *get() const { return E; } 2069 2070 Expr *operator->() { 2071 return E; 2072 } 2073 2074 private: 2075 // FIXME: No need to make the entire Sema class a friend when it's just 2076 // Sema::MakeFullExpr that needs access to the constructor below. 2077 friend class Sema; 2078 2079 explicit FullExprArg(Expr *expr) : E(expr) {} 2080 2081 Expr *E; 2082 }; 2083 2084 FullExprArg MakeFullExpr(Expr *Arg) { 2085 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2086 } 2087 2088 StmtResult ActOnExprStmt(FullExprArg Expr); 2089 2090 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2091 bool HasLeadingEmptyMacro = false); 2092 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2093 MultiStmtArg Elts, 2094 bool isStmtExpr); 2095 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2096 SourceLocation StartLoc, 2097 SourceLocation EndLoc); 2098 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2099 StmtResult ActOnForEachLValueExpr(Expr *E); 2100 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2101 SourceLocation DotDotDotLoc, Expr *RHSVal, 2102 SourceLocation ColonLoc); 2103 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2104 2105 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2106 SourceLocation ColonLoc, 2107 Stmt *SubStmt, Scope *CurScope); 2108 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2109 SourceLocation ColonLoc, Stmt *SubStmt); 2110 2111 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2112 FullExprArg CondVal, Decl *CondVar, 2113 Stmt *ThenVal, 2114 SourceLocation ElseLoc, Stmt *ElseVal); 2115 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2116 Expr *Cond, 2117 Decl *CondVar); 2118 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2119 Stmt *Switch, Stmt *Body); 2120 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2121 FullExprArg Cond, 2122 Decl *CondVar, Stmt *Body); 2123 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2124 SourceLocation WhileLoc, 2125 SourceLocation CondLParen, Expr *Cond, 2126 SourceLocation CondRParen); 2127 2128 StmtResult ActOnForStmt(SourceLocation ForLoc, 2129 SourceLocation LParenLoc, 2130 Stmt *First, FullExprArg Second, 2131 Decl *SecondVar, 2132 FullExprArg Third, 2133 SourceLocation RParenLoc, 2134 Stmt *Body); 2135 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2136 Expr *collection); 2137 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2138 SourceLocation LParenLoc, 2139 Stmt *First, Expr *Second, 2140 SourceLocation RParenLoc, Stmt *Body); 2141 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2142 SourceLocation LParenLoc, Stmt *LoopVar, 2143 SourceLocation ColonLoc, Expr *Collection, 2144 SourceLocation RParenLoc); 2145 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2146 SourceLocation ColonLoc, 2147 Stmt *RangeDecl, Stmt *BeginEndDecl, 2148 Expr *Cond, Expr *Inc, 2149 Stmt *LoopVarDecl, 2150 SourceLocation RParenLoc); 2151 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2152 2153 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2154 SourceLocation LabelLoc, 2155 LabelDecl *TheDecl); 2156 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2157 SourceLocation StarLoc, 2158 Expr *DestExp); 2159 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2160 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2161 2162 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2163 bool AllowFunctionParameters); 2164 2165 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2166 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2167 2168 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2169 bool IsSimple, bool IsVolatile, 2170 unsigned NumOutputs, unsigned NumInputs, 2171 IdentifierInfo **Names, 2172 MultiExprArg Constraints, 2173 MultiExprArg Exprs, 2174 Expr *AsmString, 2175 MultiExprArg Clobbers, 2176 SourceLocation RParenLoc, 2177 bool MSAsm = false); 2178 2179 2180 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2181 SourceLocation StartLoc, 2182 SourceLocation IdLoc, IdentifierInfo *Id, 2183 bool Invalid = false); 2184 2185 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2186 2187 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2188 Decl *Parm, Stmt *Body); 2189 2190 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2191 2192 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2193 MultiStmtArg Catch, Stmt *Finally); 2194 2195 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2196 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2197 Scope *CurScope); 2198 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2199 Expr *operand); 2200 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2201 Expr *SynchExpr, 2202 Stmt *SynchBody); 2203 2204 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2205 2206 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2207 SourceLocation StartLoc, 2208 SourceLocation IdLoc, 2209 IdentifierInfo *Id); 2210 2211 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2212 2213 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2214 Decl *ExDecl, Stmt *HandlerBlock); 2215 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2216 MultiStmtArg Handlers); 2217 2218 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2219 SourceLocation TryLoc, 2220 Stmt *TryBlock, 2221 Stmt *Handler); 2222 2223 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2224 Expr *FilterExpr, 2225 Stmt *Block); 2226 2227 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2228 Stmt *Block); 2229 2230 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2231 2232 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2233 2234 /// \brief If it's a file scoped decl that must warn if not used, keep track 2235 /// of it. 2236 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2237 2238 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2239 /// whose result is unused, warn. 2240 void DiagnoseUnusedExprResult(const Stmt *S); 2241 void DiagnoseUnusedDecl(const NamedDecl *ND); 2242 2243 ParsingDeclState PushParsingDeclaration() { 2244 return DelayedDiagnostics.pushParsingDecl(); 2245 } 2246 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2247 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2248 } 2249 2250 typedef ProcessingContextState ParsingClassState; 2251 ParsingClassState PushParsingClass() { 2252 return DelayedDiagnostics.pushContext(); 2253 } 2254 void PopParsingClass(ParsingClassState state) { 2255 DelayedDiagnostics.popContext(state); 2256 } 2257 2258 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2259 SourceLocation Loc, 2260 const ObjCInterfaceDecl *UnknownObjCClass=0); 2261 2262 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2263 2264 bool makeUnavailableInSystemHeader(SourceLocation loc, 2265 StringRef message); 2266 2267 //===--------------------------------------------------------------------===// 2268 // Expression Parsing Callbacks: SemaExpr.cpp. 2269 2270 bool CanUseDecl(NamedDecl *D); 2271 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2272 const ObjCInterfaceDecl *UnknownObjCClass=0); 2273 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2274 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2275 ObjCMethodDecl *Getter, 2276 SourceLocation Loc); 2277 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2278 Expr **Args, unsigned NumArgs); 2279 2280 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2281 2282 void PopExpressionEvaluationContext(); 2283 2284 void DiscardCleanupsInEvaluationContext(); 2285 2286 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2287 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2288 void MarkDeclarationsReferencedInExpr(Expr *E); 2289 2290 /// \brief Try to recover by turning the given expression into a 2291 /// call. Returns true if recovery was attempted or an error was 2292 /// emitted; this may also leave the ExprResult invalid. 2293 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2294 bool ForceComplain = false, 2295 bool (*IsPlausibleResult)(QualType) = 0); 2296 2297 /// \brief Figure out if an expression could be turned into a call. 2298 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2299 UnresolvedSetImpl &NonTemplateOverloads); 2300 2301 /// \brief Conditionally issue a diagnostic based on the current 2302 /// evaluation context. 2303 /// 2304 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2305 /// the function body is parsed, and then do a basic reachability analysis to 2306 /// determine if the statement is reachable. If it is unreachable, the 2307 /// diagnostic will not be emitted. 2308 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2309 const PartialDiagnostic &PD); 2310 2311 // Primary Expressions. 2312 SourceRange getExprRange(Expr *E) const; 2313 2314 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2315 bool HasTrailingLParen, bool IsAddressOfOperand); 2316 2317 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2318 TemplateArgumentListInfo &Buffer, 2319 DeclarationNameInfo &NameInfo, 2320 const TemplateArgumentListInfo *&TemplateArgs); 2321 2322 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2323 CorrectTypoContext CTC = CTC_Unknown, 2324 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2325 Expr **Args = 0, unsigned NumArgs = 0); 2326 2327 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2328 IdentifierInfo *II, 2329 bool AllowBuiltinCreation=false); 2330 2331 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2332 const DeclarationNameInfo &NameInfo, 2333 bool isAddressOfOperand, 2334 const TemplateArgumentListInfo *TemplateArgs); 2335 2336 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2337 ExprValueKind VK, 2338 SourceLocation Loc, 2339 const CXXScopeSpec *SS = 0); 2340 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2341 ExprValueKind VK, 2342 const DeclarationNameInfo &NameInfo, 2343 const CXXScopeSpec *SS = 0); 2344 ExprResult 2345 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2346 SourceLocation nameLoc, 2347 IndirectFieldDecl *indirectField, 2348 Expr *baseObjectExpr = 0, 2349 SourceLocation opLoc = SourceLocation()); 2350 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2351 LookupResult &R, 2352 const TemplateArgumentListInfo *TemplateArgs); 2353 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2354 LookupResult &R, 2355 const TemplateArgumentListInfo *TemplateArgs, 2356 bool IsDefiniteInstance); 2357 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2358 const LookupResult &R, 2359 bool HasTrailingLParen); 2360 2361 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2362 const DeclarationNameInfo &NameInfo); 2363 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2364 const DeclarationNameInfo &NameInfo, 2365 const TemplateArgumentListInfo *TemplateArgs); 2366 2367 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2368 LookupResult &R, 2369 bool NeedsADL); 2370 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2371 const DeclarationNameInfo &NameInfo, 2372 NamedDecl *D); 2373 2374 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2375 ExprResult ActOnNumericConstant(const Token &Tok); 2376 ExprResult ActOnCharacterConstant(const Token &Tok); 2377 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2378 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2379 SourceLocation R, 2380 MultiExprArg Val); 2381 2382 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2383 /// fragments (e.g. "foo" "bar" L"baz"). 2384 ExprResult ActOnStringLiteral(const Token *StringToks, 2385 unsigned NumStringToks); 2386 2387 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2388 SourceLocation DefaultLoc, 2389 SourceLocation RParenLoc, 2390 Expr *ControllingExpr, 2391 MultiTypeArg ArgTypes, 2392 MultiExprArg ArgExprs); 2393 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2394 SourceLocation DefaultLoc, 2395 SourceLocation RParenLoc, 2396 Expr *ControllingExpr, 2397 TypeSourceInfo **Types, 2398 Expr **Exprs, 2399 unsigned NumAssocs); 2400 2401 // Binary/Unary Operators. 'Tok' is the token for the operator. 2402 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2403 Expr *InputExpr); 2404 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2405 UnaryOperatorKind Opc, Expr *Input); 2406 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2407 tok::TokenKind Op, Expr *Input); 2408 2409 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2410 SourceLocation OpLoc, 2411 UnaryExprOrTypeTrait ExprKind, 2412 SourceRange R); 2413 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2414 UnaryExprOrTypeTrait ExprKind); 2415 ExprResult 2416 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2417 UnaryExprOrTypeTrait ExprKind, 2418 bool IsType, void *TyOrEx, 2419 const SourceRange &ArgRange); 2420 2421 ExprResult CheckPlaceholderExpr(Expr *E); 2422 bool CheckVecStepExpr(Expr *E); 2423 2424 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2425 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2426 SourceRange ExprRange, 2427 UnaryExprOrTypeTrait ExprKind); 2428 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2429 SourceLocation OpLoc, 2430 IdentifierInfo &Name, 2431 SourceLocation NameLoc, 2432 SourceLocation RParenLoc); 2433 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2434 tok::TokenKind Kind, Expr *Input); 2435 2436 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2437 Expr *Idx, SourceLocation RLoc); 2438 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2439 Expr *Idx, SourceLocation RLoc); 2440 2441 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2442 SourceLocation OpLoc, bool IsArrow, 2443 CXXScopeSpec &SS, 2444 NamedDecl *FirstQualifierInScope, 2445 const DeclarationNameInfo &NameInfo, 2446 const TemplateArgumentListInfo *TemplateArgs); 2447 2448 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2449 SourceLocation OpLoc, bool IsArrow, 2450 const CXXScopeSpec &SS, 2451 NamedDecl *FirstQualifierInScope, 2452 LookupResult &R, 2453 const TemplateArgumentListInfo *TemplateArgs, 2454 bool SuppressQualifierCheck = false); 2455 2456 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2457 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2458 bool &IsArrow, SourceLocation OpLoc, 2459 CXXScopeSpec &SS, 2460 Decl *ObjCImpDecl, 2461 bool HasTemplateArgs); 2462 2463 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2464 const CXXScopeSpec &SS, 2465 const LookupResult &R); 2466 2467 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2468 bool IsArrow, SourceLocation OpLoc, 2469 const CXXScopeSpec &SS, 2470 NamedDecl *FirstQualifierInScope, 2471 const DeclarationNameInfo &NameInfo, 2472 const TemplateArgumentListInfo *TemplateArgs); 2473 2474 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2475 SourceLocation OpLoc, 2476 tok::TokenKind OpKind, 2477 CXXScopeSpec &SS, 2478 UnqualifiedId &Member, 2479 Decl *ObjCImpDecl, 2480 bool HasTrailingLParen); 2481 2482 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2483 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2484 FunctionDecl *FDecl, 2485 const FunctionProtoType *Proto, 2486 Expr **Args, unsigned NumArgs, 2487 SourceLocation RParenLoc, 2488 bool ExecConfig = false); 2489 void CheckStaticArrayArgument(SourceLocation CallLoc, 2490 ParmVarDecl *Param, 2491 const Expr *ArgExpr); 2492 2493 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2494 /// This provides the location of the left/right parens and a list of comma 2495 /// locations. 2496 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2497 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2498 Expr *ExecConfig = 0, bool IsExecConfig = false); 2499 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2500 SourceLocation LParenLoc, 2501 Expr **Args, unsigned NumArgs, 2502 SourceLocation RParenLoc, 2503 Expr *Config = 0, 2504 bool IsExecConfig = false); 2505 2506 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2507 MultiExprArg ExecConfig, 2508 SourceLocation GGGLoc); 2509 2510 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2511 Declarator &D, ParsedType &Ty, 2512 SourceLocation RParenLoc, Expr *CastExpr); 2513 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2514 TypeSourceInfo *Ty, 2515 SourceLocation RParenLoc, 2516 Expr *Op); 2517 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2518 2519 /// \brief Build an altivec or OpenCL literal. 2520 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2521 SourceLocation RParenLoc, Expr *E, 2522 TypeSourceInfo *TInfo); 2523 2524 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2525 2526 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2527 ParsedType Ty, 2528 SourceLocation RParenLoc, 2529 Expr *InitExpr); 2530 2531 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2532 TypeSourceInfo *TInfo, 2533 SourceLocation RParenLoc, 2534 Expr *LiteralExpr); 2535 2536 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2537 MultiExprArg InitArgList, 2538 SourceLocation RBraceLoc); 2539 2540 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2541 SourceLocation Loc, 2542 bool GNUSyntax, 2543 ExprResult Init); 2544 2545 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2546 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2547 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2548 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2549 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2550 Expr *LHSExpr, Expr *RHSExpr); 2551 2552 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2553 /// in the case of a the GNU conditional expr extension. 2554 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2555 SourceLocation ColonLoc, 2556 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2557 2558 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2559 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2560 LabelDecl *TheDecl); 2561 2562 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2563 SourceLocation RPLoc); // "({..})" 2564 2565 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2566 struct OffsetOfComponent { 2567 SourceLocation LocStart, LocEnd; 2568 bool isBrackets; // true if [expr], false if .ident 2569 union { 2570 IdentifierInfo *IdentInfo; 2571 Expr *E; 2572 } U; 2573 }; 2574 2575 /// __builtin_offsetof(type, a.b[123][456].c) 2576 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2577 TypeSourceInfo *TInfo, 2578 OffsetOfComponent *CompPtr, 2579 unsigned NumComponents, 2580 SourceLocation RParenLoc); 2581 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2582 SourceLocation BuiltinLoc, 2583 SourceLocation TypeLoc, 2584 ParsedType ParsedArgTy, 2585 OffsetOfComponent *CompPtr, 2586 unsigned NumComponents, 2587 SourceLocation RParenLoc); 2588 2589 // __builtin_choose_expr(constExpr, expr1, expr2) 2590 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2591 Expr *CondExpr, Expr *LHSExpr, 2592 Expr *RHSExpr, SourceLocation RPLoc); 2593 2594 // __builtin_va_arg(expr, type) 2595 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2596 SourceLocation RPLoc); 2597 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2598 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2599 2600 // __null 2601 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2602 2603 bool CheckCaseExpression(Expr *E); 2604 2605 /// \brief Describes the result of an "if-exists" condition check. 2606 enum IfExistsResult { 2607 /// \brief The symbol exists. 2608 IER_Exists, 2609 2610 /// \brief The symbol does not exist. 2611 IER_DoesNotExist, 2612 2613 /// \brief The name is a dependent name, so the results will differ 2614 /// from one instantiation to the next. 2615 IER_Dependent, 2616 2617 /// \brief An error occurred. 2618 IER_Error 2619 }; 2620 2621 IfExistsResult 2622 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2623 const DeclarationNameInfo &TargetNameInfo); 2624 2625 IfExistsResult 2626 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2627 bool IsIfExists, CXXScopeSpec &SS, 2628 UnqualifiedId &Name); 2629 2630 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2631 bool IsIfExists, 2632 NestedNameSpecifierLoc QualifierLoc, 2633 DeclarationNameInfo NameInfo, 2634 Stmt *Nested); 2635 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2636 bool IsIfExists, 2637 CXXScopeSpec &SS, UnqualifiedId &Name, 2638 Stmt *Nested); 2639 2640 //===------------------------- "Block" Extension ------------------------===// 2641 2642 /// ActOnBlockStart - This callback is invoked when a block literal is 2643 /// started. 2644 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2645 2646 /// ActOnBlockArguments - This callback allows processing of block arguments. 2647 /// If there are no arguments, this is still invoked. 2648 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2649 2650 /// ActOnBlockError - If there is an error parsing a block, this callback 2651 /// is invoked to pop the information about the block from the action impl. 2652 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2653 2654 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2655 /// literal was successfully completed. ^(int x){...} 2656 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2657 Scope *CurScope); 2658 2659 //===---------------------------- OpenCL Features -----------------------===// 2660 2661 /// __builtin_astype(...) 2662 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2663 SourceLocation BuiltinLoc, 2664 SourceLocation RParenLoc); 2665 2666 //===---------------------------- C++ Features --------------------------===// 2667 2668 // Act on C++ namespaces 2669 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2670 SourceLocation NamespaceLoc, 2671 SourceLocation IdentLoc, 2672 IdentifierInfo *Ident, 2673 SourceLocation LBrace, 2674 AttributeList *AttrList); 2675 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2676 2677 NamespaceDecl *getStdNamespace() const; 2678 NamespaceDecl *getOrCreateStdNamespace(); 2679 2680 CXXRecordDecl *getStdBadAlloc() const; 2681 2682 Decl *ActOnUsingDirective(Scope *CurScope, 2683 SourceLocation UsingLoc, 2684 SourceLocation NamespcLoc, 2685 CXXScopeSpec &SS, 2686 SourceLocation IdentLoc, 2687 IdentifierInfo *NamespcName, 2688 AttributeList *AttrList); 2689 2690 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2691 2692 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2693 SourceLocation NamespaceLoc, 2694 SourceLocation AliasLoc, 2695 IdentifierInfo *Alias, 2696 CXXScopeSpec &SS, 2697 SourceLocation IdentLoc, 2698 IdentifierInfo *Ident); 2699 2700 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2701 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2702 const LookupResult &PreviousDecls); 2703 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2704 NamedDecl *Target); 2705 2706 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2707 bool isTypeName, 2708 const CXXScopeSpec &SS, 2709 SourceLocation NameLoc, 2710 const LookupResult &Previous); 2711 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2712 const CXXScopeSpec &SS, 2713 SourceLocation NameLoc); 2714 2715 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2716 SourceLocation UsingLoc, 2717 CXXScopeSpec &SS, 2718 const DeclarationNameInfo &NameInfo, 2719 AttributeList *AttrList, 2720 bool IsInstantiation, 2721 bool IsTypeName, 2722 SourceLocation TypenameLoc); 2723 2724 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2725 2726 Decl *ActOnUsingDeclaration(Scope *CurScope, 2727 AccessSpecifier AS, 2728 bool HasUsingKeyword, 2729 SourceLocation UsingLoc, 2730 CXXScopeSpec &SS, 2731 UnqualifiedId &Name, 2732 AttributeList *AttrList, 2733 bool IsTypeName, 2734 SourceLocation TypenameLoc); 2735 Decl *ActOnAliasDeclaration(Scope *CurScope, 2736 AccessSpecifier AS, 2737 MultiTemplateParamsArg TemplateParams, 2738 SourceLocation UsingLoc, 2739 UnqualifiedId &Name, 2740 TypeResult Type); 2741 2742 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2743 /// ActOnDeclarator, when a C++ direct initializer is present. 2744 /// e.g: "int x(1);" 2745 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2746 SourceLocation LParenLoc, 2747 MultiExprArg Exprs, 2748 SourceLocation RParenLoc, 2749 bool TypeMayContainAuto); 2750 2751 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2752 /// and sets it as the initializer for the the passed in VarDecl. 2753 bool InitializeVarWithConstructor(VarDecl *VD, 2754 CXXConstructorDecl *Constructor, 2755 MultiExprArg Exprs, 2756 bool HadMultipleCandidates); 2757 2758 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2759 /// including handling of its default argument expressions. 2760 /// 2761 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2762 ExprResult 2763 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2764 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2765 bool HadMultipleCandidates, bool RequiresZeroInit, 2766 unsigned ConstructKind, SourceRange ParenRange); 2767 2768 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2769 // the constructor can be elidable? 2770 ExprResult 2771 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2772 CXXConstructorDecl *Constructor, bool Elidable, 2773 MultiExprArg Exprs, bool HadMultipleCandidates, 2774 bool RequiresZeroInit, unsigned ConstructKind, 2775 SourceRange ParenRange); 2776 2777 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2778 /// the default expr if needed. 2779 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2780 FunctionDecl *FD, 2781 ParmVarDecl *Param); 2782 2783 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2784 /// constructed variable. 2785 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2786 2787 /// \brief Helper class that collects exception specifications for 2788 /// implicitly-declared special member functions. 2789 class ImplicitExceptionSpecification { 2790 // Pointer to allow copying 2791 ASTContext *Context; 2792 // We order exception specifications thus: 2793 // noexcept is the most restrictive, but is only used in C++0x. 2794 // throw() comes next. 2795 // Then a throw(collected exceptions) 2796 // Finally no specification. 2797 // throw(...) is used instead if any called function uses it. 2798 // 2799 // If this exception specification cannot be known yet (for instance, 2800 // because this is the exception specification for a defaulted default 2801 // constructor and we haven't finished parsing the deferred parts of the 2802 // class yet), the C++0x standard does not specify how to behave. We 2803 // record this as an 'unknown' exception specification, which overrules 2804 // any other specification (even 'none', to keep this rule simple). 2805 ExceptionSpecificationType ComputedEST; 2806 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2807 SmallVector<QualType, 4> Exceptions; 2808 2809 void ClearExceptions() { 2810 ExceptionsSeen.clear(); 2811 Exceptions.clear(); 2812 } 2813 2814 public: 2815 explicit ImplicitExceptionSpecification(ASTContext &Context) 2816 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2817 if (!Context.getLangOptions().CPlusPlus0x) 2818 ComputedEST = EST_DynamicNone; 2819 } 2820 2821 /// \brief Get the computed exception specification type. 2822 ExceptionSpecificationType getExceptionSpecType() const { 2823 assert(ComputedEST != EST_ComputedNoexcept && 2824 "noexcept(expr) should not be a possible result"); 2825 return ComputedEST; 2826 } 2827 2828 /// \brief The number of exceptions in the exception specification. 2829 unsigned size() const { return Exceptions.size(); } 2830 2831 /// \brief The set of exceptions in the exception specification. 2832 const QualType *data() const { return Exceptions.data(); } 2833 2834 /// \brief Integrate another called method into the collected data. 2835 void CalledDecl(CXXMethodDecl *Method); 2836 2837 /// \brief Integrate an invoked expression into the collected data. 2838 void CalledExpr(Expr *E); 2839 2840 /// \brief Specify that the exception specification can't be detemined yet. 2841 void SetDelayed() { 2842 ClearExceptions(); 2843 ComputedEST = EST_Delayed; 2844 } 2845 2846 FunctionProtoType::ExtProtoInfo getEPI() const { 2847 FunctionProtoType::ExtProtoInfo EPI; 2848 EPI.ExceptionSpecType = getExceptionSpecType(); 2849 EPI.NumExceptions = size(); 2850 EPI.Exceptions = data(); 2851 return EPI; 2852 } 2853 }; 2854 2855 /// \brief Determine what sort of exception specification a defaulted 2856 /// copy constructor of a class will have. 2857 ImplicitExceptionSpecification 2858 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2859 2860 /// \brief Determine what sort of exception specification a defaulted 2861 /// default constructor of a class will have, and whether the parameter 2862 /// will be const. 2863 std::pair<ImplicitExceptionSpecification, bool> 2864 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2865 2866 /// \brief Determine what sort of exception specification a defautled 2867 /// copy assignment operator of a class will have, and whether the 2868 /// parameter will be const. 2869 std::pair<ImplicitExceptionSpecification, bool> 2870 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2871 2872 /// \brief Determine what sort of exception specification a defaulted move 2873 /// constructor of a class will have. 2874 ImplicitExceptionSpecification 2875 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2876 2877 /// \brief Determine what sort of exception specification a defaulted move 2878 /// assignment operator of a class will have. 2879 ImplicitExceptionSpecification 2880 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2881 2882 /// \brief Determine what sort of exception specification a defaulted 2883 /// destructor of a class will have. 2884 ImplicitExceptionSpecification 2885 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2886 2887 /// \brief Determine if a special member function should have a deleted 2888 /// definition when it is defaulted. 2889 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2890 2891 /// \brief Determine if a defaulted copy assignment operator ought to be 2892 /// deleted. 2893 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2894 2895 /// \brief Determine if a defaulted move assignment operator ought to be 2896 /// deleted. 2897 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2898 2899 /// \brief Determine if a defaulted destructor ought to be deleted. 2900 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2901 2902 /// \brief Declare the implicit default constructor for the given class. 2903 /// 2904 /// \param ClassDecl The class declaration into which the implicit 2905 /// default constructor will be added. 2906 /// 2907 /// \returns The implicitly-declared default constructor. 2908 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2909 CXXRecordDecl *ClassDecl); 2910 2911 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2912 /// defining this constructor as the default constructor. 2913 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2914 CXXConstructorDecl *Constructor); 2915 2916 /// \brief Declare the implicit destructor for the given class. 2917 /// 2918 /// \param ClassDecl The class declaration into which the implicit 2919 /// destructor will be added. 2920 /// 2921 /// \returns The implicitly-declared destructor. 2922 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2923 2924 /// DefineImplicitDestructor - Checks for feasibility of 2925 /// defining this destructor as the default destructor. 2926 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2927 CXXDestructorDecl *Destructor); 2928 2929 /// \brief Build an exception spec for destructors that don't have one. 2930 /// 2931 /// C++11 says that user-defined destructors with no exception spec get one 2932 /// that looks as if the destructor was implicitly declared. 2933 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2934 CXXDestructorDecl *Destructor); 2935 2936 /// \brief Declare all inherited constructors for the given class. 2937 /// 2938 /// \param ClassDecl The class declaration into which the inherited 2939 /// constructors will be added. 2940 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2941 2942 /// \brief Declare the implicit copy constructor for the given class. 2943 /// 2944 /// \param ClassDecl The class declaration into which the implicit 2945 /// copy constructor will be added. 2946 /// 2947 /// \returns The implicitly-declared copy constructor. 2948 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2949 2950 /// DefineImplicitCopyConstructor - Checks for feasibility of 2951 /// defining this constructor as the copy constructor. 2952 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2953 CXXConstructorDecl *Constructor); 2954 2955 /// \brief Declare the implicit move constructor for the given class. 2956 /// 2957 /// \param ClassDecl The Class declaration into which the implicit 2958 /// move constructor will be added. 2959 /// 2960 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2961 /// declared. 2962 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2963 2964 /// DefineImplicitMoveConstructor - Checks for feasibility of 2965 /// defining this constructor as the move constructor. 2966 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2967 CXXConstructorDecl *Constructor); 2968 2969 /// \brief Declare the implicit copy assignment operator for the given class. 2970 /// 2971 /// \param ClassDecl The class declaration into which the implicit 2972 /// copy assignment operator will be added. 2973 /// 2974 /// \returns The implicitly-declared copy assignment operator. 2975 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2976 2977 /// \brief Defines an implicitly-declared copy assignment operator. 2978 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2979 CXXMethodDecl *MethodDecl); 2980 2981 /// \brief Declare the implicit move assignment operator for the given class. 2982 /// 2983 /// \param ClassDecl The Class declaration into which the implicit 2984 /// move assignment operator will be added. 2985 /// 2986 /// \returns The implicitly-declared move assignment operator, or NULL if it 2987 /// wasn't declared. 2988 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2989 2990 /// \brief Defines an implicitly-declared move assignment operator. 2991 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2992 CXXMethodDecl *MethodDecl); 2993 2994 /// \brief Force the declaration of any implicitly-declared members of this 2995 /// class. 2996 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2997 2998 /// MaybeBindToTemporary - If the passed in expression has a record type with 2999 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3000 /// it simply returns the passed in expression. 3001 ExprResult MaybeBindToTemporary(Expr *E); 3002 3003 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3004 MultiExprArg ArgsPtr, 3005 SourceLocation Loc, 3006 ASTOwningVector<Expr*> &ConvertedArgs); 3007 3008 ParsedType getDestructorName(SourceLocation TildeLoc, 3009 IdentifierInfo &II, SourceLocation NameLoc, 3010 Scope *S, CXXScopeSpec &SS, 3011 ParsedType ObjectType, 3012 bool EnteringContext); 3013 3014 // Checks that reinterpret casts don't have undefined behavior. 3015 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3016 bool IsDereference, SourceRange Range); 3017 3018 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3019 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3020 tok::TokenKind Kind, 3021 SourceLocation LAngleBracketLoc, 3022 Declarator &D, 3023 SourceLocation RAngleBracketLoc, 3024 SourceLocation LParenLoc, 3025 Expr *E, 3026 SourceLocation RParenLoc); 3027 3028 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3029 tok::TokenKind Kind, 3030 TypeSourceInfo *Ty, 3031 Expr *E, 3032 SourceRange AngleBrackets, 3033 SourceRange Parens); 3034 3035 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3036 SourceLocation TypeidLoc, 3037 TypeSourceInfo *Operand, 3038 SourceLocation RParenLoc); 3039 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3040 SourceLocation TypeidLoc, 3041 Expr *Operand, 3042 SourceLocation RParenLoc); 3043 3044 /// ActOnCXXTypeid - Parse typeid( something ). 3045 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3046 SourceLocation LParenLoc, bool isType, 3047 void *TyOrExpr, 3048 SourceLocation RParenLoc); 3049 3050 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3051 SourceLocation TypeidLoc, 3052 TypeSourceInfo *Operand, 3053 SourceLocation RParenLoc); 3054 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3055 SourceLocation TypeidLoc, 3056 Expr *Operand, 3057 SourceLocation RParenLoc); 3058 3059 /// ActOnCXXUuidof - Parse __uuidof( something ). 3060 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3061 SourceLocation LParenLoc, bool isType, 3062 void *TyOrExpr, 3063 SourceLocation RParenLoc); 3064 3065 3066 //// ActOnCXXThis - Parse 'this' pointer. 3067 ExprResult ActOnCXXThis(SourceLocation loc); 3068 3069 /// \brief Try to retrieve the type of the 'this' pointer. 3070 /// 3071 /// \param Capture If true, capture 'this' in this context. 3072 /// 3073 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3074 QualType getCurrentThisType(bool Capture = true); 3075 3076 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3077 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3078 3079 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3080 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3081 3082 //// ActOnCXXThrow - Parse throw expressions. 3083 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3084 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3085 bool IsThrownVarInScope); 3086 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3087 bool IsThrownVarInScope); 3088 3089 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3090 /// Can be interpreted either as function-style casting ("int(x)") 3091 /// or class type construction ("ClassType(x,y,z)") 3092 /// or creation of a value-initialized type ("int()"). 3093 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3094 SourceLocation LParenLoc, 3095 MultiExprArg Exprs, 3096 SourceLocation RParenLoc); 3097 3098 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3099 SourceLocation LParenLoc, 3100 MultiExprArg Exprs, 3101 SourceLocation RParenLoc); 3102 3103 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3104 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3105 SourceLocation PlacementLParen, 3106 MultiExprArg PlacementArgs, 3107 SourceLocation PlacementRParen, 3108 SourceRange TypeIdParens, Declarator &D, 3109 SourceLocation ConstructorLParen, 3110 MultiExprArg ConstructorArgs, 3111 SourceLocation ConstructorRParen); 3112 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3113 SourceLocation PlacementLParen, 3114 MultiExprArg PlacementArgs, 3115 SourceLocation PlacementRParen, 3116 SourceRange TypeIdParens, 3117 QualType AllocType, 3118 TypeSourceInfo *AllocTypeInfo, 3119 Expr *ArraySize, 3120 SourceLocation ConstructorLParen, 3121 MultiExprArg ConstructorArgs, 3122 SourceLocation ConstructorRParen, 3123 bool TypeMayContainAuto = true); 3124 3125 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3126 SourceRange R); 3127 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3128 bool UseGlobal, QualType AllocType, bool IsArray, 3129 Expr **PlaceArgs, unsigned NumPlaceArgs, 3130 FunctionDecl *&OperatorNew, 3131 FunctionDecl *&OperatorDelete); 3132 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3133 DeclarationName Name, Expr** Args, 3134 unsigned NumArgs, DeclContext *Ctx, 3135 bool AllowMissing, FunctionDecl *&Operator, 3136 bool Diagnose = true); 3137 void DeclareGlobalNewDelete(); 3138 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3139 QualType Argument, 3140 bool addMallocAttr = false); 3141 3142 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3143 DeclarationName Name, FunctionDecl* &Operator, 3144 bool Diagnose = true); 3145 3146 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3147 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3148 bool UseGlobal, bool ArrayForm, 3149 Expr *Operand); 3150 3151 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3152 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3153 SourceLocation StmtLoc, 3154 bool ConvertToBoolean); 3155 3156 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3157 Expr *Operand, SourceLocation RParen); 3158 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3159 SourceLocation RParen); 3160 3161 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3162 /// pseudo-functions. 3163 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3164 SourceLocation KWLoc, 3165 ParsedType Ty, 3166 SourceLocation RParen); 3167 3168 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3169 SourceLocation KWLoc, 3170 TypeSourceInfo *T, 3171 SourceLocation RParen); 3172 3173 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3174 /// pseudo-functions. 3175 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3176 SourceLocation KWLoc, 3177 ParsedType LhsTy, 3178 ParsedType RhsTy, 3179 SourceLocation RParen); 3180 3181 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3182 SourceLocation KWLoc, 3183 TypeSourceInfo *LhsT, 3184 TypeSourceInfo *RhsT, 3185 SourceLocation RParen); 3186 3187 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3188 /// pseudo-functions. 3189 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3190 SourceLocation KWLoc, 3191 ParsedType LhsTy, 3192 Expr *DimExpr, 3193 SourceLocation RParen); 3194 3195 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3196 SourceLocation KWLoc, 3197 TypeSourceInfo *TSInfo, 3198 Expr *DimExpr, 3199 SourceLocation RParen); 3200 3201 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3202 /// pseudo-functions. 3203 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3204 SourceLocation KWLoc, 3205 Expr *Queried, 3206 SourceLocation RParen); 3207 3208 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3209 SourceLocation KWLoc, 3210 Expr *Queried, 3211 SourceLocation RParen); 3212 3213 ExprResult ActOnStartCXXMemberReference(Scope *S, 3214 Expr *Base, 3215 SourceLocation OpLoc, 3216 tok::TokenKind OpKind, 3217 ParsedType &ObjectType, 3218 bool &MayBePseudoDestructor); 3219 3220 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3221 3222 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3223 SourceLocation OpLoc, 3224 tok::TokenKind OpKind, 3225 const CXXScopeSpec &SS, 3226 TypeSourceInfo *ScopeType, 3227 SourceLocation CCLoc, 3228 SourceLocation TildeLoc, 3229 PseudoDestructorTypeStorage DestroyedType, 3230 bool HasTrailingLParen); 3231 3232 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3233 SourceLocation OpLoc, 3234 tok::TokenKind OpKind, 3235 CXXScopeSpec &SS, 3236 UnqualifiedId &FirstTypeName, 3237 SourceLocation CCLoc, 3238 SourceLocation TildeLoc, 3239 UnqualifiedId &SecondTypeName, 3240 bool HasTrailingLParen); 3241 3242 /// MaybeCreateExprWithCleanups - If the current full-expression 3243 /// requires any cleanups, surround it with a ExprWithCleanups node. 3244 /// Otherwise, just returns the passed-in expression. 3245 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3246 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3247 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3248 3249 ExprResult ActOnFinishFullExpr(Expr *Expr); 3250 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3251 3252 // Marks SS invalid if it represents an incomplete type. 3253 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3254 3255 DeclContext *computeDeclContext(QualType T); 3256 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3257 bool EnteringContext = false); 3258 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3259 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3260 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3261 3262 /// \brief The parser has parsed a global nested-name-specifier '::'. 3263 /// 3264 /// \param S The scope in which this nested-name-specifier occurs. 3265 /// 3266 /// \param CCLoc The location of the '::'. 3267 /// 3268 /// \param SS The nested-name-specifier, which will be updated in-place 3269 /// to reflect the parsed nested-name-specifier. 3270 /// 3271 /// \returns true if an error occurred, false otherwise. 3272 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3273 CXXScopeSpec &SS); 3274 3275 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3276 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3277 3278 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3279 SourceLocation IdLoc, 3280 IdentifierInfo &II, 3281 ParsedType ObjectType); 3282 3283 bool BuildCXXNestedNameSpecifier(Scope *S, 3284 IdentifierInfo &Identifier, 3285 SourceLocation IdentifierLoc, 3286 SourceLocation CCLoc, 3287 QualType ObjectType, 3288 bool EnteringContext, 3289 CXXScopeSpec &SS, 3290 NamedDecl *ScopeLookupResult, 3291 bool ErrorRecoveryLookup); 3292 3293 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3294 /// 3295 /// \param S The scope in which this nested-name-specifier occurs. 3296 /// 3297 /// \param Identifier The identifier preceding the '::'. 3298 /// 3299 /// \param IdentifierLoc The location of the identifier. 3300 /// 3301 /// \param CCLoc The location of the '::'. 3302 /// 3303 /// \param ObjectType The type of the object, if we're parsing 3304 /// nested-name-specifier in a member access expression. 3305 /// 3306 /// \param EnteringContext Whether we're entering the context nominated by 3307 /// this nested-name-specifier. 3308 /// 3309 /// \param SS The nested-name-specifier, which is both an input 3310 /// parameter (the nested-name-specifier before this type) and an 3311 /// output parameter (containing the full nested-name-specifier, 3312 /// including this new type). 3313 /// 3314 /// \returns true if an error occurred, false otherwise. 3315 bool ActOnCXXNestedNameSpecifier(Scope *S, 3316 IdentifierInfo &Identifier, 3317 SourceLocation IdentifierLoc, 3318 SourceLocation CCLoc, 3319 ParsedType ObjectType, 3320 bool EnteringContext, 3321 CXXScopeSpec &SS); 3322 3323 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3324 IdentifierInfo &Identifier, 3325 SourceLocation IdentifierLoc, 3326 SourceLocation ColonLoc, 3327 ParsedType ObjectType, 3328 bool EnteringContext); 3329 3330 /// \brief The parser has parsed a nested-name-specifier 3331 /// 'template[opt] template-name < template-args >::'. 3332 /// 3333 /// \param S The scope in which this nested-name-specifier occurs. 3334 /// 3335 /// \param TemplateLoc The location of the 'template' keyword, if any. 3336 /// 3337 /// \param SS The nested-name-specifier, which is both an input 3338 /// parameter (the nested-name-specifier before this type) and an 3339 /// output parameter (containing the full nested-name-specifier, 3340 /// including this new type). 3341 /// 3342 /// \param TemplateLoc the location of the 'template' keyword, if any. 3343 /// \param TemplateName The template name. 3344 /// \param TemplateNameLoc The location of the template name. 3345 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3346 /// \param TemplateArgs The template arguments. 3347 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3348 /// \param CCLoc The location of the '::'. 3349 3350 /// \param EnteringContext Whether we're entering the context of the 3351 /// nested-name-specifier. 3352 /// 3353 /// 3354 /// \returns true if an error occurred, false otherwise. 3355 bool ActOnCXXNestedNameSpecifier(Scope *S, 3356 SourceLocation TemplateLoc, 3357 CXXScopeSpec &SS, 3358 TemplateTy Template, 3359 SourceLocation TemplateNameLoc, 3360 SourceLocation LAngleLoc, 3361 ASTTemplateArgsPtr TemplateArgs, 3362 SourceLocation RAngleLoc, 3363 SourceLocation CCLoc, 3364 bool EnteringContext); 3365 3366 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3367 /// that the parser can use later to reconstruct the given 3368 /// nested-name-specifier. 3369 /// 3370 /// \param SS A nested-name-specifier. 3371 /// 3372 /// \returns A pointer containing all of the information in the 3373 /// nested-name-specifier \p SS. 3374 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3375 3376 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3377 /// the nested-name-specifier structure. 3378 /// 3379 /// \param Annotation The annotation pointer, produced by 3380 /// \c SaveNestedNameSpecifierAnnotation(). 3381 /// 3382 /// \param AnnotationRange The source range corresponding to the annotation. 3383 /// 3384 /// \param SS The nested-name-specifier that will be updated with the contents 3385 /// of the annotation pointer. 3386 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3387 SourceRange AnnotationRange, 3388 CXXScopeSpec &SS); 3389 3390 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3391 3392 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3393 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3394 /// After this method is called, according to [C++ 3.4.3p3], names should be 3395 /// looked up in the declarator-id's scope, until the declarator is parsed and 3396 /// ActOnCXXExitDeclaratorScope is called. 3397 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3398 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3399 3400 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3401 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3402 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3403 /// Used to indicate that names should revert to being looked up in the 3404 /// defining scope. 3405 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3406 3407 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3408 /// initializer for the declaration 'Dcl'. 3409 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3410 /// static data member of class X, names should be looked up in the scope of 3411 /// class X. 3412 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3413 3414 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3415 /// initializer for the declaration 'Dcl'. 3416 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3417 3418 // ParseObjCStringLiteral - Parse Objective-C string literals. 3419 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3420 Expr **Strings, 3421 unsigned NumStrings); 3422 3423 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3424 TypeSourceInfo *EncodedTypeInfo, 3425 SourceLocation RParenLoc); 3426 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3427 CXXMethodDecl *Method, 3428 bool HadMultipleCandidates); 3429 3430 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3431 SourceLocation EncodeLoc, 3432 SourceLocation LParenLoc, 3433 ParsedType Ty, 3434 SourceLocation RParenLoc); 3435 3436 // ParseObjCSelectorExpression - Build selector expression for @selector 3437 ExprResult ParseObjCSelectorExpression(Selector Sel, 3438 SourceLocation AtLoc, 3439 SourceLocation SelLoc, 3440 SourceLocation LParenLoc, 3441 SourceLocation RParenLoc); 3442 3443 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3444 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3445 SourceLocation AtLoc, 3446 SourceLocation ProtoLoc, 3447 SourceLocation LParenLoc, 3448 SourceLocation RParenLoc); 3449 3450 //===--------------------------------------------------------------------===// 3451 // C++ Declarations 3452 // 3453 Decl *ActOnStartLinkageSpecification(Scope *S, 3454 SourceLocation ExternLoc, 3455 SourceLocation LangLoc, 3456 StringRef Lang, 3457 SourceLocation LBraceLoc); 3458 Decl *ActOnFinishLinkageSpecification(Scope *S, 3459 Decl *LinkageSpec, 3460 SourceLocation RBraceLoc); 3461 3462 3463 //===--------------------------------------------------------------------===// 3464 // C++ Classes 3465 // 3466 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3467 const CXXScopeSpec *SS = 0); 3468 3469 bool ActOnAccessSpecifier(AccessSpecifier Access, 3470 SourceLocation ASLoc, 3471 SourceLocation ColonLoc, 3472 AttributeList *Attrs = 0); 3473 3474 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3475 Declarator &D, 3476 MultiTemplateParamsArg TemplateParameterLists, 3477 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3478 bool HasDeferredInit); 3479 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3480 Expr *Init); 3481 3482 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3483 Scope *S, 3484 CXXScopeSpec &SS, 3485 IdentifierInfo *MemberOrBase, 3486 ParsedType TemplateTypeTy, 3487 SourceLocation IdLoc, 3488 SourceLocation LParenLoc, 3489 Expr **Args, unsigned NumArgs, 3490 SourceLocation RParenLoc, 3491 SourceLocation EllipsisLoc); 3492 3493 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3494 Scope *S, 3495 CXXScopeSpec &SS, 3496 IdentifierInfo *MemberOrBase, 3497 ParsedType TemplateTypeTy, 3498 SourceLocation IdLoc, 3499 Expr *InitList, 3500 SourceLocation EllipsisLoc); 3501 3502 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3503 Scope *S, 3504 CXXScopeSpec &SS, 3505 IdentifierInfo *MemberOrBase, 3506 ParsedType TemplateTypeTy, 3507 SourceLocation IdLoc, 3508 const MultiInitializer &Init, 3509 SourceLocation EllipsisLoc); 3510 3511 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3512 const MultiInitializer &Args, 3513 SourceLocation IdLoc); 3514 3515 MemInitResult BuildBaseInitializer(QualType BaseType, 3516 TypeSourceInfo *BaseTInfo, 3517 const MultiInitializer &Args, 3518 CXXRecordDecl *ClassDecl, 3519 SourceLocation EllipsisLoc); 3520 3521 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3522 const MultiInitializer &Args, 3523 CXXRecordDecl *ClassDecl); 3524 3525 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3526 CXXCtorInitializer *Initializer); 3527 3528 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3529 CXXCtorInitializer **Initializers, 3530 unsigned NumInitializers, bool AnyErrors); 3531 3532 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3533 3534 3535 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3536 /// mark all the non-trivial destructors of its members and bases as 3537 /// referenced. 3538 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3539 CXXRecordDecl *Record); 3540 3541 /// \brief The list of classes whose vtables have been used within 3542 /// this translation unit, and the source locations at which the 3543 /// first use occurred. 3544 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3545 3546 /// \brief The list of vtables that are required but have not yet been 3547 /// materialized. 3548 SmallVector<VTableUse, 16> VTableUses; 3549 3550 /// \brief The set of classes whose vtables have been used within 3551 /// this translation unit, and a bit that will be true if the vtable is 3552 /// required to be emitted (otherwise, it should be emitted only if needed 3553 /// by code generation). 3554 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3555 3556 /// \brief Load any externally-stored vtable uses. 3557 void LoadExternalVTableUses(); 3558 3559 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3560 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3561 DynamicClassesType; 3562 3563 /// \brief A list of all of the dynamic classes in this translation 3564 /// unit. 3565 DynamicClassesType DynamicClasses; 3566 3567 /// \brief Note that the vtable for the given class was used at the 3568 /// given location. 3569 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3570 bool DefinitionRequired = false); 3571 3572 /// MarkVirtualMembersReferenced - Will mark all members of the given 3573 /// CXXRecordDecl referenced. 3574 void MarkVirtualMembersReferenced(SourceLocation Loc, 3575 const CXXRecordDecl *RD); 3576 3577 /// \brief Define all of the vtables that have been used in this 3578 /// translation unit and reference any virtual members used by those 3579 /// vtables. 3580 /// 3581 /// \returns true if any work was done, false otherwise. 3582 bool DefineUsedVTables(); 3583 3584 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3585 3586 void ActOnMemInitializers(Decl *ConstructorDecl, 3587 SourceLocation ColonLoc, 3588 CXXCtorInitializer **MemInits, 3589 unsigned NumMemInits, 3590 bool AnyErrors); 3591 3592 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3593 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3594 Decl *TagDecl, 3595 SourceLocation LBrac, 3596 SourceLocation RBrac, 3597 AttributeList *AttrList); 3598 3599 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3600 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3601 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3602 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3603 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3604 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3605 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3606 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3607 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3608 bool IsInsideALocalClassWithinATemplateFunction(); 3609 3610 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3611 Expr *AssertExpr, 3612 Expr *AssertMessageExpr, 3613 SourceLocation RParenLoc); 3614 3615 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3616 SourceLocation FriendLoc, 3617 TypeSourceInfo *TSInfo); 3618 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3619 MultiTemplateParamsArg TemplateParams); 3620 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3621 MultiTemplateParamsArg TemplateParams); 3622 3623 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3624 StorageClass& SC); 3625 void CheckConstructor(CXXConstructorDecl *Constructor); 3626 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3627 StorageClass& SC); 3628 bool CheckDestructor(CXXDestructorDecl *Destructor); 3629 void CheckConversionDeclarator(Declarator &D, QualType &R, 3630 StorageClass& SC); 3631 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3632 3633 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3634 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3635 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3636 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3637 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3638 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3639 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3640 3641 //===--------------------------------------------------------------------===// 3642 // C++ Derived Classes 3643 // 3644 3645 /// ActOnBaseSpecifier - Parsed a base specifier 3646 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3647 SourceRange SpecifierRange, 3648 bool Virtual, AccessSpecifier Access, 3649 TypeSourceInfo *TInfo, 3650 SourceLocation EllipsisLoc); 3651 3652 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3653 SourceRange SpecifierRange, 3654 bool Virtual, AccessSpecifier Access, 3655 ParsedType basetype, 3656 SourceLocation BaseLoc, 3657 SourceLocation EllipsisLoc); 3658 3659 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3660 unsigned NumBases); 3661 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3662 unsigned NumBases); 3663 3664 bool IsDerivedFrom(QualType Derived, QualType Base); 3665 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3666 3667 // FIXME: I don't like this name. 3668 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3669 3670 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3671 3672 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3673 SourceLocation Loc, SourceRange Range, 3674 CXXCastPath *BasePath = 0, 3675 bool IgnoreAccess = false); 3676 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3677 unsigned InaccessibleBaseID, 3678 unsigned AmbigiousBaseConvID, 3679 SourceLocation Loc, SourceRange Range, 3680 DeclarationName Name, 3681 CXXCastPath *BasePath); 3682 3683 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3684 3685 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3686 /// covariant, according to C++ [class.virtual]p5. 3687 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3688 const CXXMethodDecl *Old); 3689 3690 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3691 /// spec is a subset of base spec. 3692 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3693 const CXXMethodDecl *Old); 3694 3695 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3696 3697 /// CheckOverrideControl - Check C++0x override control semantics. 3698 void CheckOverrideControl(const Decl *D); 3699 3700 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3701 /// overrides a virtual member function marked 'final', according to 3702 /// C++0x [class.virtual]p3. 3703 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3704 const CXXMethodDecl *Old); 3705 3706 3707 //===--------------------------------------------------------------------===// 3708 // C++ Access Control 3709 // 3710 3711 enum AccessResult { 3712 AR_accessible, 3713 AR_inaccessible, 3714 AR_dependent, 3715 AR_delayed 3716 }; 3717 3718 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3719 NamedDecl *PrevMemberDecl, 3720 AccessSpecifier LexicalAS); 3721 3722 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3723 DeclAccessPair FoundDecl); 3724 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3725 DeclAccessPair FoundDecl); 3726 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3727 SourceRange PlacementRange, 3728 CXXRecordDecl *NamingClass, 3729 DeclAccessPair FoundDecl, 3730 bool Diagnose = true); 3731 AccessResult CheckConstructorAccess(SourceLocation Loc, 3732 CXXConstructorDecl *D, 3733 const InitializedEntity &Entity, 3734 AccessSpecifier Access, 3735 bool IsCopyBindingRefToTemp = false); 3736 AccessResult CheckConstructorAccess(SourceLocation Loc, 3737 CXXConstructorDecl *D, 3738 AccessSpecifier Access, 3739 PartialDiagnostic PD); 3740 AccessResult CheckDestructorAccess(SourceLocation Loc, 3741 CXXDestructorDecl *Dtor, 3742 const PartialDiagnostic &PDiag); 3743 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3744 NamedDecl *D, 3745 const PartialDiagnostic &PDiag); 3746 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3747 Expr *ObjectExpr, 3748 Expr *ArgExpr, 3749 DeclAccessPair FoundDecl); 3750 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3751 DeclAccessPair FoundDecl); 3752 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3753 QualType Base, QualType Derived, 3754 const CXXBasePath &Path, 3755 unsigned DiagID, 3756 bool ForceCheck = false, 3757 bool ForceUnprivileged = false); 3758 void CheckLookupAccess(const LookupResult &R); 3759 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3760 3761 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3762 const MultiLevelTemplateArgumentList &TemplateArgs); 3763 void PerformDependentDiagnostics(const DeclContext *Pattern, 3764 const MultiLevelTemplateArgumentList &TemplateArgs); 3765 3766 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3767 3768 /// A flag to suppress access checking. 3769 bool SuppressAccessChecking; 3770 3771 /// \brief When true, access checking violations are treated as SFINAE 3772 /// failures rather than hard errors. 3773 bool AccessCheckingSFINAE; 3774 3775 void ActOnStartSuppressingAccessChecks(); 3776 void ActOnStopSuppressingAccessChecks(); 3777 3778 enum AbstractDiagSelID { 3779 AbstractNone = -1, 3780 AbstractReturnType, 3781 AbstractParamType, 3782 AbstractVariableType, 3783 AbstractFieldType, 3784 AbstractArrayType 3785 }; 3786 3787 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3788 const PartialDiagnostic &PD); 3789 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3790 3791 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3792 AbstractDiagSelID SelID = AbstractNone); 3793 3794 //===--------------------------------------------------------------------===// 3795 // C++ Overloaded Operators [C++ 13.5] 3796 // 3797 3798 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3799 3800 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3801 3802 //===--------------------------------------------------------------------===// 3803 // C++ Templates [C++ 14] 3804 // 3805 void FilterAcceptableTemplateNames(LookupResult &R); 3806 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3807 3808 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3809 QualType ObjectType, bool EnteringContext, 3810 bool &MemberOfUnknownSpecialization); 3811 3812 TemplateNameKind isTemplateName(Scope *S, 3813 CXXScopeSpec &SS, 3814 bool hasTemplateKeyword, 3815 UnqualifiedId &Name, 3816 ParsedType ObjectType, 3817 bool EnteringContext, 3818 TemplateTy &Template, 3819 bool &MemberOfUnknownSpecialization); 3820 3821 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3822 SourceLocation IILoc, 3823 Scope *S, 3824 const CXXScopeSpec *SS, 3825 TemplateTy &SuggestedTemplate, 3826 TemplateNameKind &SuggestedKind); 3827 3828 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3829 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3830 3831 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3832 SourceLocation EllipsisLoc, 3833 SourceLocation KeyLoc, 3834 IdentifierInfo *ParamName, 3835 SourceLocation ParamNameLoc, 3836 unsigned Depth, unsigned Position, 3837 SourceLocation EqualLoc, 3838 ParsedType DefaultArg); 3839 3840 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3841 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3842 unsigned Depth, 3843 unsigned Position, 3844 SourceLocation EqualLoc, 3845 Expr *DefaultArg); 3846 Decl *ActOnTemplateTemplateParameter(Scope *S, 3847 SourceLocation TmpLoc, 3848 TemplateParameterList *Params, 3849 SourceLocation EllipsisLoc, 3850 IdentifierInfo *ParamName, 3851 SourceLocation ParamNameLoc, 3852 unsigned Depth, 3853 unsigned Position, 3854 SourceLocation EqualLoc, 3855 ParsedTemplateArgument DefaultArg); 3856 3857 TemplateParameterList * 3858 ActOnTemplateParameterList(unsigned Depth, 3859 SourceLocation ExportLoc, 3860 SourceLocation TemplateLoc, 3861 SourceLocation LAngleLoc, 3862 Decl **Params, unsigned NumParams, 3863 SourceLocation RAngleLoc); 3864 3865 /// \brief The context in which we are checking a template parameter 3866 /// list. 3867 enum TemplateParamListContext { 3868 TPC_ClassTemplate, 3869 TPC_FunctionTemplate, 3870 TPC_ClassTemplateMember, 3871 TPC_FriendFunctionTemplate, 3872 TPC_FriendFunctionTemplateDefinition, 3873 TPC_TypeAliasTemplate 3874 }; 3875 3876 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3877 TemplateParameterList *OldParams, 3878 TemplateParamListContext TPC); 3879 TemplateParameterList * 3880 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3881 SourceLocation DeclLoc, 3882 const CXXScopeSpec &SS, 3883 TemplateParameterList **ParamLists, 3884 unsigned NumParamLists, 3885 bool IsFriend, 3886 bool &IsExplicitSpecialization, 3887 bool &Invalid); 3888 3889 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3890 SourceLocation KWLoc, CXXScopeSpec &SS, 3891 IdentifierInfo *Name, SourceLocation NameLoc, 3892 AttributeList *Attr, 3893 TemplateParameterList *TemplateParams, 3894 AccessSpecifier AS, 3895 SourceLocation ModulePrivateLoc, 3896 unsigned NumOuterTemplateParamLists, 3897 TemplateParameterList **OuterTemplateParamLists); 3898 3899 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3900 TemplateArgumentListInfo &Out); 3901 3902 void NoteAllFoundTemplates(TemplateName Name); 3903 3904 QualType CheckTemplateIdType(TemplateName Template, 3905 SourceLocation TemplateLoc, 3906 TemplateArgumentListInfo &TemplateArgs); 3907 3908 TypeResult 3909 ActOnTemplateIdType(CXXScopeSpec &SS, 3910 TemplateTy Template, SourceLocation TemplateLoc, 3911 SourceLocation LAngleLoc, 3912 ASTTemplateArgsPtr TemplateArgs, 3913 SourceLocation RAngleLoc); 3914 3915 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3916 /// such as \c class T::template apply<U>. 3917 /// 3918 /// \param TUK 3919 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3920 TypeSpecifierType TagSpec, 3921 SourceLocation TagLoc, 3922 CXXScopeSpec &SS, 3923 TemplateTy TemplateD, 3924 SourceLocation TemplateLoc, 3925 SourceLocation LAngleLoc, 3926 ASTTemplateArgsPtr TemplateArgsIn, 3927 SourceLocation RAngleLoc); 3928 3929 3930 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3931 LookupResult &R, 3932 bool RequiresADL, 3933 const TemplateArgumentListInfo &TemplateArgs); 3934 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3935 const DeclarationNameInfo &NameInfo, 3936 const TemplateArgumentListInfo &TemplateArgs); 3937 3938 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3939 SourceLocation TemplateKWLoc, 3940 CXXScopeSpec &SS, 3941 UnqualifiedId &Name, 3942 ParsedType ObjectType, 3943 bool EnteringContext, 3944 TemplateTy &Template); 3945 3946 DeclResult 3947 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3948 SourceLocation KWLoc, 3949 SourceLocation ModulePrivateLoc, 3950 CXXScopeSpec &SS, 3951 TemplateTy Template, 3952 SourceLocation TemplateNameLoc, 3953 SourceLocation LAngleLoc, 3954 ASTTemplateArgsPtr TemplateArgs, 3955 SourceLocation RAngleLoc, 3956 AttributeList *Attr, 3957 MultiTemplateParamsArg TemplateParameterLists); 3958 3959 Decl *ActOnTemplateDeclarator(Scope *S, 3960 MultiTemplateParamsArg TemplateParameterLists, 3961 Declarator &D); 3962 3963 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3964 MultiTemplateParamsArg TemplateParameterLists, 3965 Declarator &D); 3966 3967 bool 3968 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3969 TemplateSpecializationKind NewTSK, 3970 NamedDecl *PrevDecl, 3971 TemplateSpecializationKind PrevTSK, 3972 SourceLocation PrevPtOfInstantiation, 3973 bool &SuppressNew); 3974 3975 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3976 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3977 LookupResult &Previous); 3978 3979 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3980 TemplateArgumentListInfo *ExplicitTemplateArgs, 3981 LookupResult &Previous); 3982 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3983 3984 DeclResult 3985 ActOnExplicitInstantiation(Scope *S, 3986 SourceLocation ExternLoc, 3987 SourceLocation TemplateLoc, 3988 unsigned TagSpec, 3989 SourceLocation KWLoc, 3990 const CXXScopeSpec &SS, 3991 TemplateTy Template, 3992 SourceLocation TemplateNameLoc, 3993 SourceLocation LAngleLoc, 3994 ASTTemplateArgsPtr TemplateArgs, 3995 SourceLocation RAngleLoc, 3996 AttributeList *Attr); 3997 3998 DeclResult 3999 ActOnExplicitInstantiation(Scope *S, 4000 SourceLocation ExternLoc, 4001 SourceLocation TemplateLoc, 4002 unsigned TagSpec, 4003 SourceLocation KWLoc, 4004 CXXScopeSpec &SS, 4005 IdentifierInfo *Name, 4006 SourceLocation NameLoc, 4007 AttributeList *Attr); 4008 4009 DeclResult ActOnExplicitInstantiation(Scope *S, 4010 SourceLocation ExternLoc, 4011 SourceLocation TemplateLoc, 4012 Declarator &D); 4013 4014 TemplateArgumentLoc 4015 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4016 SourceLocation TemplateLoc, 4017 SourceLocation RAngleLoc, 4018 Decl *Param, 4019 SmallVectorImpl<TemplateArgument> &Converted); 4020 4021 /// \brief Specifies the context in which a particular template 4022 /// argument is being checked. 4023 enum CheckTemplateArgumentKind { 4024 /// \brief The template argument was specified in the code or was 4025 /// instantiated with some deduced template arguments. 4026 CTAK_Specified, 4027 4028 /// \brief The template argument was deduced via template argument 4029 /// deduction. 4030 CTAK_Deduced, 4031 4032 /// \brief The template argument was deduced from an array bound 4033 /// via template argument deduction. 4034 CTAK_DeducedFromArrayBound 4035 }; 4036 4037 bool CheckTemplateArgument(NamedDecl *Param, 4038 const TemplateArgumentLoc &Arg, 4039 NamedDecl *Template, 4040 SourceLocation TemplateLoc, 4041 SourceLocation RAngleLoc, 4042 unsigned ArgumentPackIndex, 4043 SmallVectorImpl<TemplateArgument> &Converted, 4044 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4045 4046 /// \brief Check that the given template arguments can be be provided to 4047 /// the given template, converting the arguments along the way. 4048 /// 4049 /// \param Template The template to which the template arguments are being 4050 /// provided. 4051 /// 4052 /// \param TemplateLoc The location of the template name in the source. 4053 /// 4054 /// \param TemplateArgs The list of template arguments. If the template is 4055 /// a template template parameter, this function may extend the set of 4056 /// template arguments to also include substituted, defaulted template 4057 /// arguments. 4058 /// 4059 /// \param PartialTemplateArgs True if the list of template arguments is 4060 /// intentionally partial, e.g., because we're checking just the initial 4061 /// set of template arguments. 4062 /// 4063 /// \param Converted Will receive the converted, canonicalized template 4064 /// arguments. 4065 /// 4066 /// \returns True if an error occurred, false otherwise. 4067 bool CheckTemplateArgumentList(TemplateDecl *Template, 4068 SourceLocation TemplateLoc, 4069 TemplateArgumentListInfo &TemplateArgs, 4070 bool PartialTemplateArgs, 4071 SmallVectorImpl<TemplateArgument> &Converted); 4072 4073 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4074 const TemplateArgumentLoc &Arg, 4075 SmallVectorImpl<TemplateArgument> &Converted); 4076 4077 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4078 TypeSourceInfo *Arg); 4079 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4080 TemplateArgument &Converted); 4081 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4082 QualType InstantiatedParamType, Expr *Arg, 4083 TemplateArgument &Converted, 4084 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4085 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4086 const TemplateArgumentLoc &Arg); 4087 4088 ExprResult 4089 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4090 QualType ParamType, 4091 SourceLocation Loc); 4092 ExprResult 4093 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4094 SourceLocation Loc); 4095 4096 /// \brief Enumeration describing how template parameter lists are compared 4097 /// for equality. 4098 enum TemplateParameterListEqualKind { 4099 /// \brief We are matching the template parameter lists of two templates 4100 /// that might be redeclarations. 4101 /// 4102 /// \code 4103 /// template<typename T> struct X; 4104 /// template<typename T> struct X; 4105 /// \endcode 4106 TPL_TemplateMatch, 4107 4108 /// \brief We are matching the template parameter lists of two template 4109 /// template parameters as part of matching the template parameter lists 4110 /// of two templates that might be redeclarations. 4111 /// 4112 /// \code 4113 /// template<template<int I> class TT> struct X; 4114 /// template<template<int Value> class Other> struct X; 4115 /// \endcode 4116 TPL_TemplateTemplateParmMatch, 4117 4118 /// \brief We are matching the template parameter lists of a template 4119 /// template argument against the template parameter lists of a template 4120 /// template parameter. 4121 /// 4122 /// \code 4123 /// template<template<int Value> class Metafun> struct X; 4124 /// template<int Value> struct integer_c; 4125 /// X<integer_c> xic; 4126 /// \endcode 4127 TPL_TemplateTemplateArgumentMatch 4128 }; 4129 4130 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4131 TemplateParameterList *Old, 4132 bool Complain, 4133 TemplateParameterListEqualKind Kind, 4134 SourceLocation TemplateArgLoc 4135 = SourceLocation()); 4136 4137 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4138 4139 /// \brief Called when the parser has parsed a C++ typename 4140 /// specifier, e.g., "typename T::type". 4141 /// 4142 /// \param S The scope in which this typename type occurs. 4143 /// \param TypenameLoc the location of the 'typename' keyword 4144 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4145 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4146 /// \param IdLoc the location of the identifier. 4147 TypeResult 4148 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4149 const CXXScopeSpec &SS, const IdentifierInfo &II, 4150 SourceLocation IdLoc); 4151 4152 /// \brief Called when the parser has parsed a C++ typename 4153 /// specifier that ends in a template-id, e.g., 4154 /// "typename MetaFun::template apply<T1, T2>". 4155 /// 4156 /// \param S The scope in which this typename type occurs. 4157 /// \param TypenameLoc the location of the 'typename' keyword 4158 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4159 /// \param TemplateLoc the location of the 'template' keyword, if any. 4160 /// \param TemplateName The template name. 4161 /// \param TemplateNameLoc The location of the template name. 4162 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4163 /// \param TemplateArgs The template arguments. 4164 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4165 TypeResult 4166 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4167 const CXXScopeSpec &SS, 4168 SourceLocation TemplateLoc, 4169 TemplateTy Template, 4170 SourceLocation TemplateNameLoc, 4171 SourceLocation LAngleLoc, 4172 ASTTemplateArgsPtr TemplateArgs, 4173 SourceLocation RAngleLoc); 4174 4175 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4176 SourceLocation KeywordLoc, 4177 NestedNameSpecifierLoc QualifierLoc, 4178 const IdentifierInfo &II, 4179 SourceLocation IILoc); 4180 4181 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4182 SourceLocation Loc, 4183 DeclarationName Name); 4184 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4185 4186 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4187 bool RebuildTemplateParamsInCurrentInstantiation( 4188 TemplateParameterList *Params); 4189 4190 std::string 4191 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4192 const TemplateArgumentList &Args); 4193 4194 std::string 4195 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4196 const TemplateArgument *Args, 4197 unsigned NumArgs); 4198 4199 //===--------------------------------------------------------------------===// 4200 // C++ Variadic Templates (C++0x [temp.variadic]) 4201 //===--------------------------------------------------------------------===// 4202 4203 /// \brief The context in which an unexpanded parameter pack is 4204 /// being diagnosed. 4205 /// 4206 /// Note that the values of this enumeration line up with the first 4207 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4208 enum UnexpandedParameterPackContext { 4209 /// \brief An arbitrary expression. 4210 UPPC_Expression = 0, 4211 4212 /// \brief The base type of a class type. 4213 UPPC_BaseType, 4214 4215 /// \brief The type of an arbitrary declaration. 4216 UPPC_DeclarationType, 4217 4218 /// \brief The type of a data member. 4219 UPPC_DataMemberType, 4220 4221 /// \brief The size of a bit-field. 4222 UPPC_BitFieldWidth, 4223 4224 /// \brief The expression in a static assertion. 4225 UPPC_StaticAssertExpression, 4226 4227 /// \brief The fixed underlying type of an enumeration. 4228 UPPC_FixedUnderlyingType, 4229 4230 /// \brief The enumerator value. 4231 UPPC_EnumeratorValue, 4232 4233 /// \brief A using declaration. 4234 UPPC_UsingDeclaration, 4235 4236 /// \brief A friend declaration. 4237 UPPC_FriendDeclaration, 4238 4239 /// \brief A declaration qualifier. 4240 UPPC_DeclarationQualifier, 4241 4242 /// \brief An initializer. 4243 UPPC_Initializer, 4244 4245 /// \brief A default argument. 4246 UPPC_DefaultArgument, 4247 4248 /// \brief The type of a non-type template parameter. 4249 UPPC_NonTypeTemplateParameterType, 4250 4251 /// \brief The type of an exception. 4252 UPPC_ExceptionType, 4253 4254 /// \brief Partial specialization. 4255 UPPC_PartialSpecialization, 4256 4257 /// \brief Microsoft __if_exists. 4258 UPPC_IfExists, 4259 4260 /// \brief Microsoft __if_not_exists. 4261 UPPC_IfNotExists 4262}; 4263 4264 /// \brief Diagnose unexpanded parameter packs. 4265 /// 4266 /// \param Loc The location at which we should emit the diagnostic. 4267 /// 4268 /// \param UPPC The context in which we are diagnosing unexpanded 4269 /// parameter packs. 4270 /// 4271 /// \param Unexpanded the set of unexpanded parameter packs. 4272 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4273 UnexpandedParameterPackContext UPPC, 4274 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4275 4276 /// \brief If the given type contains an unexpanded parameter pack, 4277 /// diagnose the error. 4278 /// 4279 /// \param Loc The source location where a diagnostc should be emitted. 4280 /// 4281 /// \param T The type that is being checked for unexpanded parameter 4282 /// packs. 4283 /// 4284 /// \returns true if an error occurred, false otherwise. 4285 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4286 UnexpandedParameterPackContext UPPC); 4287 4288 /// \brief If the given expression contains an unexpanded parameter 4289 /// pack, diagnose the error. 4290 /// 4291 /// \param E The expression that is being checked for unexpanded 4292 /// parameter packs. 4293 /// 4294 /// \returns true if an error occurred, false otherwise. 4295 bool DiagnoseUnexpandedParameterPack(Expr *E, 4296 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4297 4298 /// \brief If the given nested-name-specifier contains an unexpanded 4299 /// parameter pack, diagnose the error. 4300 /// 4301 /// \param SS The nested-name-specifier that is being checked for 4302 /// unexpanded parameter packs. 4303 /// 4304 /// \returns true if an error occurred, false otherwise. 4305 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4306 UnexpandedParameterPackContext UPPC); 4307 4308 /// \brief If the given name contains an unexpanded parameter pack, 4309 /// diagnose the error. 4310 /// 4311 /// \param NameInfo The name (with source location information) that 4312 /// is being checked for unexpanded parameter packs. 4313 /// 4314 /// \returns true if an error occurred, false otherwise. 4315 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4316 UnexpandedParameterPackContext UPPC); 4317 4318 /// \brief If the given template name contains an unexpanded parameter pack, 4319 /// diagnose the error. 4320 /// 4321 /// \param Loc The location of the template name. 4322 /// 4323 /// \param Template The template name that is being checked for unexpanded 4324 /// parameter packs. 4325 /// 4326 /// \returns true if an error occurred, false otherwise. 4327 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4328 TemplateName Template, 4329 UnexpandedParameterPackContext UPPC); 4330 4331 /// \brief If the given template argument contains an unexpanded parameter 4332 /// pack, diagnose the error. 4333 /// 4334 /// \param Arg The template argument that is being checked for unexpanded 4335 /// parameter packs. 4336 /// 4337 /// \returns true if an error occurred, false otherwise. 4338 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4339 UnexpandedParameterPackContext UPPC); 4340 4341 /// \brief Collect the set of unexpanded parameter packs within the given 4342 /// template argument. 4343 /// 4344 /// \param Arg The template argument that will be traversed to find 4345 /// unexpanded parameter packs. 4346 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4347 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4348 4349 /// \brief Collect the set of unexpanded parameter packs within the given 4350 /// template argument. 4351 /// 4352 /// \param Arg The template argument that will be traversed to find 4353 /// unexpanded parameter packs. 4354 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4355 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4356 4357 /// \brief Collect the set of unexpanded parameter packs within the given 4358 /// type. 4359 /// 4360 /// \param T The type that will be traversed to find 4361 /// unexpanded parameter packs. 4362 void collectUnexpandedParameterPacks(QualType T, 4363 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4364 4365 /// \brief Collect the set of unexpanded parameter packs within the given 4366 /// type. 4367 /// 4368 /// \param TL The type that will be traversed to find 4369 /// unexpanded parameter packs. 4370 void collectUnexpandedParameterPacks(TypeLoc TL, 4371 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4372 4373 /// \brief Collect the set of unexpanded parameter packs within the given 4374 /// nested-name-specifier. 4375 /// 4376 /// \param SS The nested-name-specifier that will be traversed to find 4377 /// unexpanded parameter packs. 4378 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4379 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4380 4381 /// \brief Collect the set of unexpanded parameter packs within the given 4382 /// name. 4383 /// 4384 /// \param NameInfo The name that will be traversed to find 4385 /// unexpanded parameter packs. 4386 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4387 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4388 4389 /// \brief Invoked when parsing a template argument followed by an 4390 /// ellipsis, which creates a pack expansion. 4391 /// 4392 /// \param Arg The template argument preceding the ellipsis, which 4393 /// may already be invalid. 4394 /// 4395 /// \param EllipsisLoc The location of the ellipsis. 4396 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4397 SourceLocation EllipsisLoc); 4398 4399 /// \brief Invoked when parsing a type followed by an ellipsis, which 4400 /// creates a pack expansion. 4401 /// 4402 /// \param Type The type preceding the ellipsis, which will become 4403 /// the pattern of the pack expansion. 4404 /// 4405 /// \param EllipsisLoc The location of the ellipsis. 4406 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4407 4408 /// \brief Construct a pack expansion type from the pattern of the pack 4409 /// expansion. 4410 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4411 SourceLocation EllipsisLoc, 4412 llvm::Optional<unsigned> NumExpansions); 4413 4414 /// \brief Construct a pack expansion type from the pattern of the pack 4415 /// expansion. 4416 QualType CheckPackExpansion(QualType Pattern, 4417 SourceRange PatternRange, 4418 SourceLocation EllipsisLoc, 4419 llvm::Optional<unsigned> NumExpansions); 4420 4421 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4422 /// creates a pack expansion. 4423 /// 4424 /// \param Pattern The expression preceding the ellipsis, which will become 4425 /// the pattern of the pack expansion. 4426 /// 4427 /// \param EllipsisLoc The location of the ellipsis. 4428 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4429 4430 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4431 /// creates a pack expansion. 4432 /// 4433 /// \param Pattern The expression preceding the ellipsis, which will become 4434 /// the pattern of the pack expansion. 4435 /// 4436 /// \param EllipsisLoc The location of the ellipsis. 4437 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4438 llvm::Optional<unsigned> NumExpansions); 4439 4440 /// \brief Determine whether we could expand a pack expansion with the 4441 /// given set of parameter packs into separate arguments by repeatedly 4442 /// transforming the pattern. 4443 /// 4444 /// \param EllipsisLoc The location of the ellipsis that identifies the 4445 /// pack expansion. 4446 /// 4447 /// \param PatternRange The source range that covers the entire pattern of 4448 /// the pack expansion. 4449 /// 4450 /// \param Unexpanded The set of unexpanded parameter packs within the 4451 /// pattern. 4452 /// 4453 /// \param NumUnexpanded The number of unexpanded parameter packs in 4454 /// \p Unexpanded. 4455 /// 4456 /// \param ShouldExpand Will be set to \c true if the transformer should 4457 /// expand the corresponding pack expansions into separate arguments. When 4458 /// set, \c NumExpansions must also be set. 4459 /// 4460 /// \param RetainExpansion Whether the caller should add an unexpanded 4461 /// pack expansion after all of the expanded arguments. This is used 4462 /// when extending explicitly-specified template argument packs per 4463 /// C++0x [temp.arg.explicit]p9. 4464 /// 4465 /// \param NumExpansions The number of separate arguments that will be in 4466 /// the expanded form of the corresponding pack expansion. This is both an 4467 /// input and an output parameter, which can be set by the caller if the 4468 /// number of expansions is known a priori (e.g., due to a prior substitution) 4469 /// and will be set by the callee when the number of expansions is known. 4470 /// The callee must set this value when \c ShouldExpand is \c true; it may 4471 /// set this value in other cases. 4472 /// 4473 /// \returns true if an error occurred (e.g., because the parameter packs 4474 /// are to be instantiated with arguments of different lengths), false 4475 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4476 /// must be set. 4477 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4478 SourceRange PatternRange, 4479 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4480 const MultiLevelTemplateArgumentList &TemplateArgs, 4481 bool &ShouldExpand, 4482 bool &RetainExpansion, 4483 llvm::Optional<unsigned> &NumExpansions); 4484 4485 /// \brief Determine the number of arguments in the given pack expansion 4486 /// type. 4487 /// 4488 /// This routine already assumes that the pack expansion type can be 4489 /// expanded and that the number of arguments in the expansion is 4490 /// consistent across all of the unexpanded parameter packs in its pattern. 4491 unsigned getNumArgumentsInExpansion(QualType T, 4492 const MultiLevelTemplateArgumentList &TemplateArgs); 4493 4494 /// \brief Determine whether the given declarator contains any unexpanded 4495 /// parameter packs. 4496 /// 4497 /// This routine is used by the parser to disambiguate function declarators 4498 /// with an ellipsis prior to the ')', e.g., 4499 /// 4500 /// \code 4501 /// void f(T...); 4502 /// \endcode 4503 /// 4504 /// To determine whether we have an (unnamed) function parameter pack or 4505 /// a variadic function. 4506 /// 4507 /// \returns true if the declarator contains any unexpanded parameter packs, 4508 /// false otherwise. 4509 bool containsUnexpandedParameterPacks(Declarator &D); 4510 4511 //===--------------------------------------------------------------------===// 4512 // C++ Template Argument Deduction (C++ [temp.deduct]) 4513 //===--------------------------------------------------------------------===// 4514 4515 /// \brief Describes the result of template argument deduction. 4516 /// 4517 /// The TemplateDeductionResult enumeration describes the result of 4518 /// template argument deduction, as returned from 4519 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4520 /// structure provides additional information about the results of 4521 /// template argument deduction, e.g., the deduced template argument 4522 /// list (if successful) or the specific template parameters or 4523 /// deduced arguments that were involved in the failure. 4524 enum TemplateDeductionResult { 4525 /// \brief Template argument deduction was successful. 4526 TDK_Success = 0, 4527 /// \brief Template argument deduction exceeded the maximum template 4528 /// instantiation depth (which has already been diagnosed). 4529 TDK_InstantiationDepth, 4530 /// \brief Template argument deduction did not deduce a value 4531 /// for every template parameter. 4532 TDK_Incomplete, 4533 /// \brief Template argument deduction produced inconsistent 4534 /// deduced values for the given template parameter. 4535 TDK_Inconsistent, 4536 /// \brief Template argument deduction failed due to inconsistent 4537 /// cv-qualifiers on a template parameter type that would 4538 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4539 /// but were given a non-const "X". 4540 TDK_Underqualified, 4541 /// \brief Substitution of the deduced template argument values 4542 /// resulted in an error. 4543 TDK_SubstitutionFailure, 4544 /// \brief Substitution of the deduced template argument values 4545 /// into a non-deduced context produced a type or value that 4546 /// produces a type that does not match the original template 4547 /// arguments provided. 4548 TDK_NonDeducedMismatch, 4549 /// \brief When performing template argument deduction for a function 4550 /// template, there were too many call arguments. 4551 TDK_TooManyArguments, 4552 /// \brief When performing template argument deduction for a function 4553 /// template, there were too few call arguments. 4554 TDK_TooFewArguments, 4555 /// \brief The explicitly-specified template arguments were not valid 4556 /// template arguments for the given template. 4557 TDK_InvalidExplicitArguments, 4558 /// \brief The arguments included an overloaded function name that could 4559 /// not be resolved to a suitable function. 4560 TDK_FailedOverloadResolution 4561 }; 4562 4563 TemplateDeductionResult 4564 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4565 const TemplateArgumentList &TemplateArgs, 4566 sema::TemplateDeductionInfo &Info); 4567 4568 TemplateDeductionResult 4569 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4570 TemplateArgumentListInfo &ExplicitTemplateArgs, 4571 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4572 SmallVectorImpl<QualType> &ParamTypes, 4573 QualType *FunctionType, 4574 sema::TemplateDeductionInfo &Info); 4575 4576 /// brief A function argument from which we performed template argument 4577 // deduction for a call. 4578 struct OriginalCallArg { 4579 OriginalCallArg(QualType OriginalParamType, 4580 unsigned ArgIdx, 4581 QualType OriginalArgType) 4582 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4583 OriginalArgType(OriginalArgType) { } 4584 4585 QualType OriginalParamType; 4586 unsigned ArgIdx; 4587 QualType OriginalArgType; 4588 }; 4589 4590 TemplateDeductionResult 4591 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4592 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4593 unsigned NumExplicitlySpecified, 4594 FunctionDecl *&Specialization, 4595 sema::TemplateDeductionInfo &Info, 4596 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4597 4598 TemplateDeductionResult 4599 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4600 TemplateArgumentListInfo *ExplicitTemplateArgs, 4601 Expr **Args, unsigned NumArgs, 4602 FunctionDecl *&Specialization, 4603 sema::TemplateDeductionInfo &Info); 4604 4605 TemplateDeductionResult 4606 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4607 TemplateArgumentListInfo *ExplicitTemplateArgs, 4608 QualType ArgFunctionType, 4609 FunctionDecl *&Specialization, 4610 sema::TemplateDeductionInfo &Info); 4611 4612 TemplateDeductionResult 4613 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4614 QualType ToType, 4615 CXXConversionDecl *&Specialization, 4616 sema::TemplateDeductionInfo &Info); 4617 4618 TemplateDeductionResult 4619 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4620 TemplateArgumentListInfo *ExplicitTemplateArgs, 4621 FunctionDecl *&Specialization, 4622 sema::TemplateDeductionInfo &Info); 4623 4624 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4625 TypeSourceInfo *&Result); 4626 4627 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4628 FunctionTemplateDecl *FT2, 4629 SourceLocation Loc, 4630 TemplatePartialOrderingContext TPOC, 4631 unsigned NumCallArguments); 4632 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4633 UnresolvedSetIterator SEnd, 4634 TemplatePartialOrderingContext TPOC, 4635 unsigned NumCallArguments, 4636 SourceLocation Loc, 4637 const PartialDiagnostic &NoneDiag, 4638 const PartialDiagnostic &AmbigDiag, 4639 const PartialDiagnostic &CandidateDiag, 4640 bool Complain = true); 4641 4642 ClassTemplatePartialSpecializationDecl * 4643 getMoreSpecializedPartialSpecialization( 4644 ClassTemplatePartialSpecializationDecl *PS1, 4645 ClassTemplatePartialSpecializationDecl *PS2, 4646 SourceLocation Loc); 4647 4648 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4649 bool OnlyDeduced, 4650 unsigned Depth, 4651 SmallVectorImpl<bool> &Used); 4652 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4653 SmallVectorImpl<bool> &Deduced); 4654 4655 //===--------------------------------------------------------------------===// 4656 // C++ Template Instantiation 4657 // 4658 4659 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4660 const TemplateArgumentList *Innermost = 0, 4661 bool RelativeToPrimary = false, 4662 const FunctionDecl *Pattern = 0); 4663 4664 /// \brief A template instantiation that is currently in progress. 4665 struct ActiveTemplateInstantiation { 4666 /// \brief The kind of template instantiation we are performing 4667 enum InstantiationKind { 4668 /// We are instantiating a template declaration. The entity is 4669 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4670 TemplateInstantiation, 4671 4672 /// We are instantiating a default argument for a template 4673 /// parameter. The Entity is the template, and 4674 /// TemplateArgs/NumTemplateArguments provides the template 4675 /// arguments as specified. 4676 /// FIXME: Use a TemplateArgumentList 4677 DefaultTemplateArgumentInstantiation, 4678 4679 /// We are instantiating a default argument for a function. 4680 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4681 /// provides the template arguments as specified. 4682 DefaultFunctionArgumentInstantiation, 4683 4684 /// We are substituting explicit template arguments provided for 4685 /// a function template. The entity is a FunctionTemplateDecl. 4686 ExplicitTemplateArgumentSubstitution, 4687 4688 /// We are substituting template argument determined as part of 4689 /// template argument deduction for either a class template 4690 /// partial specialization or a function template. The 4691 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4692 /// a FunctionTemplateDecl. 4693 DeducedTemplateArgumentSubstitution, 4694 4695 /// We are substituting prior template arguments into a new 4696 /// template parameter. The template parameter itself is either a 4697 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4698 PriorTemplateArgumentSubstitution, 4699 4700 /// We are checking the validity of a default template argument that 4701 /// has been used when naming a template-id. 4702 DefaultTemplateArgumentChecking 4703 } Kind; 4704 4705 /// \brief The point of instantiation within the source code. 4706 SourceLocation PointOfInstantiation; 4707 4708 /// \brief The template (or partial specialization) in which we are 4709 /// performing the instantiation, for substitutions of prior template 4710 /// arguments. 4711 NamedDecl *Template; 4712 4713 /// \brief The entity that is being instantiated. 4714 uintptr_t Entity; 4715 4716 /// \brief The list of template arguments we are substituting, if they 4717 /// are not part of the entity. 4718 const TemplateArgument *TemplateArgs; 4719 4720 /// \brief The number of template arguments in TemplateArgs. 4721 unsigned NumTemplateArgs; 4722 4723 /// \brief The template deduction info object associated with the 4724 /// substitution or checking of explicit or deduced template arguments. 4725 sema::TemplateDeductionInfo *DeductionInfo; 4726 4727 /// \brief The source range that covers the construct that cause 4728 /// the instantiation, e.g., the template-id that causes a class 4729 /// template instantiation. 4730 SourceRange InstantiationRange; 4731 4732 ActiveTemplateInstantiation() 4733 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4734 NumTemplateArgs(0), DeductionInfo(0) {} 4735 4736 /// \brief Determines whether this template is an actual instantiation 4737 /// that should be counted toward the maximum instantiation depth. 4738 bool isInstantiationRecord() const; 4739 4740 friend bool operator==(const ActiveTemplateInstantiation &X, 4741 const ActiveTemplateInstantiation &Y) { 4742 if (X.Kind != Y.Kind) 4743 return false; 4744 4745 if (X.Entity != Y.Entity) 4746 return false; 4747 4748 switch (X.Kind) { 4749 case TemplateInstantiation: 4750 return true; 4751 4752 case PriorTemplateArgumentSubstitution: 4753 case DefaultTemplateArgumentChecking: 4754 if (X.Template != Y.Template) 4755 return false; 4756 4757 // Fall through 4758 4759 case DefaultTemplateArgumentInstantiation: 4760 case ExplicitTemplateArgumentSubstitution: 4761 case DeducedTemplateArgumentSubstitution: 4762 case DefaultFunctionArgumentInstantiation: 4763 return X.TemplateArgs == Y.TemplateArgs; 4764 4765 } 4766 4767 return true; 4768 } 4769 4770 friend bool operator!=(const ActiveTemplateInstantiation &X, 4771 const ActiveTemplateInstantiation &Y) { 4772 return !(X == Y); 4773 } 4774 }; 4775 4776 /// \brief List of active template instantiations. 4777 /// 4778 /// This vector is treated as a stack. As one template instantiation 4779 /// requires another template instantiation, additional 4780 /// instantiations are pushed onto the stack up to a 4781 /// user-configurable limit LangOptions::InstantiationDepth. 4782 SmallVector<ActiveTemplateInstantiation, 16> 4783 ActiveTemplateInstantiations; 4784 4785 /// \brief Whether we are in a SFINAE context that is not associated with 4786 /// template instantiation. 4787 /// 4788 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4789 /// of a template instantiation or template argument deduction. 4790 bool InNonInstantiationSFINAEContext; 4791 4792 /// \brief The number of ActiveTemplateInstantiation entries in 4793 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4794 /// therefore, should not be counted as part of the instantiation depth. 4795 unsigned NonInstantiationEntries; 4796 4797 /// \brief The last template from which a template instantiation 4798 /// error or warning was produced. 4799 /// 4800 /// This value is used to suppress printing of redundant template 4801 /// instantiation backtraces when there are multiple errors in the 4802 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4803 /// to implement it anywhere else. 4804 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4805 4806 /// \brief The current index into pack expansion arguments that will be 4807 /// used for substitution of parameter packs. 4808 /// 4809 /// The pack expansion index will be -1 to indicate that parameter packs 4810 /// should be instantiated as themselves. Otherwise, the index specifies 4811 /// which argument within the parameter pack will be used for substitution. 4812 int ArgumentPackSubstitutionIndex; 4813 4814 /// \brief RAII object used to change the argument pack substitution index 4815 /// within a \c Sema object. 4816 /// 4817 /// See \c ArgumentPackSubstitutionIndex for more information. 4818 class ArgumentPackSubstitutionIndexRAII { 4819 Sema &Self; 4820 int OldSubstitutionIndex; 4821 4822 public: 4823 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4824 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4825 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4826 } 4827 4828 ~ArgumentPackSubstitutionIndexRAII() { 4829 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4830 } 4831 }; 4832 4833 friend class ArgumentPackSubstitutionRAII; 4834 4835 /// \brief The stack of calls expression undergoing template instantiation. 4836 /// 4837 /// The top of this stack is used by a fixit instantiating unresolved 4838 /// function calls to fix the AST to match the textual change it prints. 4839 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4840 4841 /// \brief For each declaration that involved template argument deduction, the 4842 /// set of diagnostics that were suppressed during that template argument 4843 /// deduction. 4844 /// 4845 /// FIXME: Serialize this structure to the AST file. 4846 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4847 SuppressedDiagnostics; 4848 4849 /// \brief A stack object to be created when performing template 4850 /// instantiation. 4851 /// 4852 /// Construction of an object of type \c InstantiatingTemplate 4853 /// pushes the current instantiation onto the stack of active 4854 /// instantiations. If the size of this stack exceeds the maximum 4855 /// number of recursive template instantiations, construction 4856 /// produces an error and evaluates true. 4857 /// 4858 /// Destruction of this object will pop the named instantiation off 4859 /// the stack. 4860 struct InstantiatingTemplate { 4861 /// \brief Note that we are instantiating a class template, 4862 /// function template, or a member thereof. 4863 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4864 Decl *Entity, 4865 SourceRange InstantiationRange = SourceRange()); 4866 4867 /// \brief Note that we are instantiating a default argument in a 4868 /// template-id. 4869 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4870 TemplateDecl *Template, 4871 const TemplateArgument *TemplateArgs, 4872 unsigned NumTemplateArgs, 4873 SourceRange InstantiationRange = SourceRange()); 4874 4875 /// \brief Note that we are instantiating a default argument in a 4876 /// template-id. 4877 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4878 FunctionTemplateDecl *FunctionTemplate, 4879 const TemplateArgument *TemplateArgs, 4880 unsigned NumTemplateArgs, 4881 ActiveTemplateInstantiation::InstantiationKind Kind, 4882 sema::TemplateDeductionInfo &DeductionInfo, 4883 SourceRange InstantiationRange = SourceRange()); 4884 4885 /// \brief Note that we are instantiating as part of template 4886 /// argument deduction for a class template partial 4887 /// specialization. 4888 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4889 ClassTemplatePartialSpecializationDecl *PartialSpec, 4890 const TemplateArgument *TemplateArgs, 4891 unsigned NumTemplateArgs, 4892 sema::TemplateDeductionInfo &DeductionInfo, 4893 SourceRange InstantiationRange = SourceRange()); 4894 4895 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4896 ParmVarDecl *Param, 4897 const TemplateArgument *TemplateArgs, 4898 unsigned NumTemplateArgs, 4899 SourceRange InstantiationRange = SourceRange()); 4900 4901 /// \brief Note that we are substituting prior template arguments into a 4902 /// non-type or template template parameter. 4903 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4904 NamedDecl *Template, 4905 NonTypeTemplateParmDecl *Param, 4906 const TemplateArgument *TemplateArgs, 4907 unsigned NumTemplateArgs, 4908 SourceRange InstantiationRange); 4909 4910 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4911 NamedDecl *Template, 4912 TemplateTemplateParmDecl *Param, 4913 const TemplateArgument *TemplateArgs, 4914 unsigned NumTemplateArgs, 4915 SourceRange InstantiationRange); 4916 4917 /// \brief Note that we are checking the default template argument 4918 /// against the template parameter for a given template-id. 4919 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4920 TemplateDecl *Template, 4921 NamedDecl *Param, 4922 const TemplateArgument *TemplateArgs, 4923 unsigned NumTemplateArgs, 4924 SourceRange InstantiationRange); 4925 4926 4927 /// \brief Note that we have finished instantiating this template. 4928 void Clear(); 4929 4930 ~InstantiatingTemplate() { Clear(); } 4931 4932 /// \brief Determines whether we have exceeded the maximum 4933 /// recursive template instantiations. 4934 operator bool() const { return Invalid; } 4935 4936 private: 4937 Sema &SemaRef; 4938 bool Invalid; 4939 bool SavedInNonInstantiationSFINAEContext; 4940 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4941 SourceRange InstantiationRange); 4942 4943 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4944 4945 InstantiatingTemplate& 4946 operator=(const InstantiatingTemplate&); // not implemented 4947 }; 4948 4949 void PrintInstantiationStack(); 4950 4951 /// \brief Determines whether we are currently in a context where 4952 /// template argument substitution failures are not considered 4953 /// errors. 4954 /// 4955 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4956 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4957 /// template-deduction context object, which can be used to capture 4958 /// diagnostics that will be suppressed. 4959 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4960 4961 /// \brief RAII class used to determine whether SFINAE has 4962 /// trapped any errors that occur during template argument 4963 /// deduction.` 4964 class SFINAETrap { 4965 Sema &SemaRef; 4966 unsigned PrevSFINAEErrors; 4967 bool PrevInNonInstantiationSFINAEContext; 4968 bool PrevAccessCheckingSFINAE; 4969 4970 public: 4971 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4972 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4973 PrevInNonInstantiationSFINAEContext( 4974 SemaRef.InNonInstantiationSFINAEContext), 4975 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4976 { 4977 if (!SemaRef.isSFINAEContext()) 4978 SemaRef.InNonInstantiationSFINAEContext = true; 4979 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4980 } 4981 4982 ~SFINAETrap() { 4983 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4984 SemaRef.InNonInstantiationSFINAEContext 4985 = PrevInNonInstantiationSFINAEContext; 4986 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4987 } 4988 4989 /// \brief Determine whether any SFINAE errors have been trapped. 4990 bool hasErrorOccurred() const { 4991 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4992 } 4993 }; 4994 4995 /// \brief The current instantiation scope used to store local 4996 /// variables. 4997 LocalInstantiationScope *CurrentInstantiationScope; 4998 4999 /// \brief The number of typos corrected by CorrectTypo. 5000 unsigned TyposCorrected; 5001 5002 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5003 UnqualifiedTyposCorrectedMap; 5004 5005 /// \brief A cache containing the results of typo correction for unqualified 5006 /// name lookup. 5007 /// 5008 /// The string is the string that we corrected to (which may be empty, if 5009 /// there was no correction), while the boolean will be true when the 5010 /// string represents a keyword. 5011 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5012 5013 /// \brief Worker object for performing CFG-based warnings. 5014 sema::AnalysisBasedWarnings AnalysisWarnings; 5015 5016 /// \brief An entity for which implicit template instantiation is required. 5017 /// 5018 /// The source location associated with the declaration is the first place in 5019 /// the source code where the declaration was "used". It is not necessarily 5020 /// the point of instantiation (which will be either before or after the 5021 /// namespace-scope declaration that triggered this implicit instantiation), 5022 /// However, it is the location that diagnostics should generally refer to, 5023 /// because users will need to know what code triggered the instantiation. 5024 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5025 5026 /// \brief The queue of implicit template instantiations that are required 5027 /// but have not yet been performed. 5028 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5029 5030 /// \brief The queue of implicit template instantiations that are required 5031 /// and must be performed within the current local scope. 5032 /// 5033 /// This queue is only used for member functions of local classes in 5034 /// templates, which must be instantiated in the same scope as their 5035 /// enclosing function, so that they can reference function-local 5036 /// types, static variables, enumerators, etc. 5037 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5038 5039 void PerformPendingInstantiations(bool LocalOnly = false); 5040 5041 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5042 const MultiLevelTemplateArgumentList &TemplateArgs, 5043 SourceLocation Loc, DeclarationName Entity); 5044 5045 QualType SubstType(QualType T, 5046 const MultiLevelTemplateArgumentList &TemplateArgs, 5047 SourceLocation Loc, DeclarationName Entity); 5048 5049 TypeSourceInfo *SubstType(TypeLoc TL, 5050 const MultiLevelTemplateArgumentList &TemplateArgs, 5051 SourceLocation Loc, DeclarationName Entity); 5052 5053 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5054 const MultiLevelTemplateArgumentList &TemplateArgs, 5055 SourceLocation Loc, 5056 DeclarationName Entity); 5057 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5058 const MultiLevelTemplateArgumentList &TemplateArgs, 5059 int indexAdjustment, 5060 llvm::Optional<unsigned> NumExpansions); 5061 bool SubstParmTypes(SourceLocation Loc, 5062 ParmVarDecl **Params, unsigned NumParams, 5063 const MultiLevelTemplateArgumentList &TemplateArgs, 5064 SmallVectorImpl<QualType> &ParamTypes, 5065 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5066 ExprResult SubstExpr(Expr *E, 5067 const MultiLevelTemplateArgumentList &TemplateArgs); 5068 5069 /// \brief Substitute the given template arguments into a list of 5070 /// expressions, expanding pack expansions if required. 5071 /// 5072 /// \param Exprs The list of expressions to substitute into. 5073 /// 5074 /// \param NumExprs The number of expressions in \p Exprs. 5075 /// 5076 /// \param IsCall Whether this is some form of call, in which case 5077 /// default arguments will be dropped. 5078 /// 5079 /// \param TemplateArgs The set of template arguments to substitute. 5080 /// 5081 /// \param Outputs Will receive all of the substituted arguments. 5082 /// 5083 /// \returns true if an error occurred, false otherwise. 5084 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5085 const MultiLevelTemplateArgumentList &TemplateArgs, 5086 SmallVectorImpl<Expr *> &Outputs); 5087 5088 StmtResult SubstStmt(Stmt *S, 5089 const MultiLevelTemplateArgumentList &TemplateArgs); 5090 5091 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5092 const MultiLevelTemplateArgumentList &TemplateArgs); 5093 5094 bool 5095 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5096 CXXRecordDecl *Pattern, 5097 const MultiLevelTemplateArgumentList &TemplateArgs); 5098 5099 bool 5100 InstantiateClass(SourceLocation PointOfInstantiation, 5101 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5102 const MultiLevelTemplateArgumentList &TemplateArgs, 5103 TemplateSpecializationKind TSK, 5104 bool Complain = true); 5105 5106 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5107 const Decl *Pattern, Decl *Inst); 5108 5109 bool 5110 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5111 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5112 TemplateSpecializationKind TSK, 5113 bool Complain = true); 5114 5115 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5116 CXXRecordDecl *Instantiation, 5117 const MultiLevelTemplateArgumentList &TemplateArgs, 5118 TemplateSpecializationKind TSK); 5119 5120 void InstantiateClassTemplateSpecializationMembers( 5121 SourceLocation PointOfInstantiation, 5122 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5123 TemplateSpecializationKind TSK); 5124 5125 NestedNameSpecifierLoc 5126 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5127 const MultiLevelTemplateArgumentList &TemplateArgs); 5128 5129 DeclarationNameInfo 5130 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5131 const MultiLevelTemplateArgumentList &TemplateArgs); 5132 TemplateName 5133 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5134 SourceLocation Loc, 5135 const MultiLevelTemplateArgumentList &TemplateArgs); 5136 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5137 TemplateArgumentListInfo &Result, 5138 const MultiLevelTemplateArgumentList &TemplateArgs); 5139 5140 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5141 FunctionDecl *Function, 5142 bool Recursive = false, 5143 bool DefinitionRequired = false); 5144 void InstantiateStaticDataMemberDefinition( 5145 SourceLocation PointOfInstantiation, 5146 VarDecl *Var, 5147 bool Recursive = false, 5148 bool DefinitionRequired = false); 5149 5150 void InstantiateMemInitializers(CXXConstructorDecl *New, 5151 const CXXConstructorDecl *Tmpl, 5152 const MultiLevelTemplateArgumentList &TemplateArgs); 5153 bool InstantiateInitializer(Expr *Init, 5154 const MultiLevelTemplateArgumentList &TemplateArgs, 5155 SourceLocation &LParenLoc, 5156 ASTOwningVector<Expr*> &NewArgs, 5157 SourceLocation &RParenLoc); 5158 5159 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5160 const MultiLevelTemplateArgumentList &TemplateArgs); 5161 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5162 const MultiLevelTemplateArgumentList &TemplateArgs); 5163 5164 // Objective-C declarations. 5165 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5166 IdentifierInfo *ClassName, 5167 SourceLocation ClassLoc, 5168 IdentifierInfo *SuperName, 5169 SourceLocation SuperLoc, 5170 Decl * const *ProtoRefs, 5171 unsigned NumProtoRefs, 5172 const SourceLocation *ProtoLocs, 5173 SourceLocation EndProtoLoc, 5174 AttributeList *AttrList); 5175 5176 Decl *ActOnCompatiblityAlias( 5177 SourceLocation AtCompatibilityAliasLoc, 5178 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5179 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5180 5181 bool CheckForwardProtocolDeclarationForCircularDependency( 5182 IdentifierInfo *PName, 5183 SourceLocation &PLoc, SourceLocation PrevLoc, 5184 const ObjCList<ObjCProtocolDecl> &PList); 5185 5186 Decl *ActOnStartProtocolInterface( 5187 SourceLocation AtProtoInterfaceLoc, 5188 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5189 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5190 const SourceLocation *ProtoLocs, 5191 SourceLocation EndProtoLoc, 5192 AttributeList *AttrList); 5193 5194 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5195 IdentifierInfo *ClassName, 5196 SourceLocation ClassLoc, 5197 IdentifierInfo *CategoryName, 5198 SourceLocation CategoryLoc, 5199 Decl * const *ProtoRefs, 5200 unsigned NumProtoRefs, 5201 const SourceLocation *ProtoLocs, 5202 SourceLocation EndProtoLoc); 5203 5204 Decl *ActOnStartClassImplementation( 5205 SourceLocation AtClassImplLoc, 5206 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5207 IdentifierInfo *SuperClassname, 5208 SourceLocation SuperClassLoc); 5209 5210 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5211 IdentifierInfo *ClassName, 5212 SourceLocation ClassLoc, 5213 IdentifierInfo *CatName, 5214 SourceLocation CatLoc); 5215 5216 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5217 IdentifierInfo **IdentList, 5218 SourceLocation *IdentLocs, 5219 unsigned NumElts); 5220 5221 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5222 const IdentifierLocPair *IdentList, 5223 unsigned NumElts, 5224 AttributeList *attrList); 5225 5226 void FindProtocolDeclaration(bool WarnOnDeclarations, 5227 const IdentifierLocPair *ProtocolId, 5228 unsigned NumProtocols, 5229 SmallVectorImpl<Decl *> &Protocols); 5230 5231 /// Ensure attributes are consistent with type. 5232 /// \param [in, out] Attributes The attributes to check; they will 5233 /// be modified to be consistent with \arg PropertyTy. 5234 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5235 SourceLocation Loc, 5236 unsigned &Attributes); 5237 5238 /// Process the specified property declaration and create decls for the 5239 /// setters and getters as needed. 5240 /// \param property The property declaration being processed 5241 /// \param DC The semantic container for the property 5242 /// \param redeclaredProperty Declaration for property if redeclared 5243 /// in class extension. 5244 /// \param lexicalDC Container for redeclaredProperty. 5245 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5246 ObjCContainerDecl *DC, 5247 ObjCPropertyDecl *redeclaredProperty = 0, 5248 ObjCContainerDecl *lexicalDC = 0); 5249 5250 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5251 ObjCPropertyDecl *SuperProperty, 5252 const IdentifierInfo *Name); 5253 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5254 5255 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5256 ObjCMethodDecl *MethodDecl, 5257 bool IsInstance); 5258 5259 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5260 5261 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5262 ObjCInterfaceDecl *ID); 5263 5264 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5265 ObjCProtocolDecl *PDecl); 5266 5267 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5268 Decl **allMethods = 0, unsigned allNum = 0, 5269 Decl **allProperties = 0, unsigned pNum = 0, 5270 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5271 5272 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5273 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5274 Selector GetterSel, Selector SetterSel, 5275 bool *OverridingProperty, 5276 tok::ObjCKeywordKind MethodImplKind, 5277 DeclContext *lexicalDC = 0); 5278 5279 Decl *ActOnPropertyImplDecl(Scope *S, 5280 SourceLocation AtLoc, 5281 SourceLocation PropertyLoc, 5282 bool ImplKind, 5283 IdentifierInfo *PropertyId, 5284 IdentifierInfo *PropertyIvar, 5285 SourceLocation PropertyIvarLoc); 5286 5287 enum ObjCSpecialMethodKind { 5288 OSMK_None, 5289 OSMK_Alloc, 5290 OSMK_New, 5291 OSMK_Copy, 5292 OSMK_RetainingInit, 5293 OSMK_NonRetainingInit 5294 }; 5295 5296 struct ObjCArgInfo { 5297 IdentifierInfo *Name; 5298 SourceLocation NameLoc; 5299 // The Type is null if no type was specified, and the DeclSpec is invalid 5300 // in this case. 5301 ParsedType Type; 5302 ObjCDeclSpec DeclSpec; 5303 5304 /// ArgAttrs - Attribute list for this argument. 5305 AttributeList *ArgAttrs; 5306 }; 5307 5308 Decl *ActOnMethodDeclaration( 5309 Scope *S, 5310 SourceLocation BeginLoc, // location of the + or -. 5311 SourceLocation EndLoc, // location of the ; or {. 5312 tok::TokenKind MethodType, 5313 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5314 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5315 // optional arguments. The number of types/arguments is obtained 5316 // from the Sel.getNumArgs(). 5317 ObjCArgInfo *ArgInfo, 5318 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5319 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5320 bool isVariadic, bool MethodDefinition); 5321 5322 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5323 // Will search "local" class/category implementations for a method decl. 5324 // Will also search in class's root looking for instance method. 5325 // Returns 0 if no method is found. 5326 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5327 ObjCInterfaceDecl *CDecl); 5328 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5329 ObjCInterfaceDecl *ClassDecl); 5330 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5331 const ObjCObjectPointerType *OPT, 5332 bool IsInstance); 5333 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5334 bool IsInstance); 5335 5336 bool inferObjCARCLifetime(ValueDecl *decl); 5337 5338 ExprResult 5339 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5340 Expr *BaseExpr, 5341 SourceLocation OpLoc, 5342 DeclarationName MemberName, 5343 SourceLocation MemberLoc, 5344 SourceLocation SuperLoc, QualType SuperType, 5345 bool Super); 5346 5347 ExprResult 5348 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5349 IdentifierInfo &propertyName, 5350 SourceLocation receiverNameLoc, 5351 SourceLocation propertyNameLoc); 5352 5353 ObjCMethodDecl *tryCaptureObjCSelf(); 5354 5355 /// \brief Describes the kind of message expression indicated by a message 5356 /// send that starts with an identifier. 5357 enum ObjCMessageKind { 5358 /// \brief The message is sent to 'super'. 5359 ObjCSuperMessage, 5360 /// \brief The message is an instance message. 5361 ObjCInstanceMessage, 5362 /// \brief The message is a class message, and the identifier is a type 5363 /// name. 5364 ObjCClassMessage 5365 }; 5366 5367 ObjCMessageKind getObjCMessageKind(Scope *S, 5368 IdentifierInfo *Name, 5369 SourceLocation NameLoc, 5370 bool IsSuper, 5371 bool HasTrailingDot, 5372 ParsedType &ReceiverType); 5373 5374 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5375 Selector Sel, 5376 SourceLocation LBracLoc, 5377 ArrayRef<SourceLocation> SelectorLocs, 5378 SourceLocation RBracLoc, 5379 MultiExprArg Args); 5380 5381 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5382 QualType ReceiverType, 5383 SourceLocation SuperLoc, 5384 Selector Sel, 5385 ObjCMethodDecl *Method, 5386 SourceLocation LBracLoc, 5387 ArrayRef<SourceLocation> SelectorLocs, 5388 SourceLocation RBracLoc, 5389 MultiExprArg Args); 5390 5391 ExprResult ActOnClassMessage(Scope *S, 5392 ParsedType Receiver, 5393 Selector Sel, 5394 SourceLocation LBracLoc, 5395 ArrayRef<SourceLocation> SelectorLocs, 5396 SourceLocation RBracLoc, 5397 MultiExprArg Args); 5398 5399 ExprResult BuildInstanceMessage(Expr *Receiver, 5400 QualType ReceiverType, 5401 SourceLocation SuperLoc, 5402 Selector Sel, 5403 ObjCMethodDecl *Method, 5404 SourceLocation LBracLoc, 5405 ArrayRef<SourceLocation> SelectorLocs, 5406 SourceLocation RBracLoc, 5407 MultiExprArg Args); 5408 5409 ExprResult ActOnInstanceMessage(Scope *S, 5410 Expr *Receiver, 5411 Selector Sel, 5412 SourceLocation LBracLoc, 5413 ArrayRef<SourceLocation> SelectorLocs, 5414 SourceLocation RBracLoc, 5415 MultiExprArg Args); 5416 5417 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5418 ObjCBridgeCastKind Kind, 5419 SourceLocation BridgeKeywordLoc, 5420 TypeSourceInfo *TSInfo, 5421 Expr *SubExpr); 5422 5423 ExprResult ActOnObjCBridgedCast(Scope *S, 5424 SourceLocation LParenLoc, 5425 ObjCBridgeCastKind Kind, 5426 SourceLocation BridgeKeywordLoc, 5427 ParsedType Type, 5428 SourceLocation RParenLoc, 5429 Expr *SubExpr); 5430 5431 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5432 5433 /// \brief Check whether the given new method is a valid override of the 5434 /// given overridden method, and set any properties that should be inherited. 5435 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5436 const ObjCMethodDecl *Overridden, 5437 bool IsImplementation); 5438 5439 /// \brief Check whether the given method overrides any methods in its class, 5440 /// calling \c CheckObjCMethodOverride for each overridden method. 5441 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5442 5443 enum PragmaOptionsAlignKind { 5444 POAK_Native, // #pragma options align=native 5445 POAK_Natural, // #pragma options align=natural 5446 POAK_Packed, // #pragma options align=packed 5447 POAK_Power, // #pragma options align=power 5448 POAK_Mac68k, // #pragma options align=mac68k 5449 POAK_Reset // #pragma options align=reset 5450 }; 5451 5452 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5453 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5454 SourceLocation PragmaLoc, 5455 SourceLocation KindLoc); 5456 5457 enum PragmaPackKind { 5458 PPK_Default, // #pragma pack([n]) 5459 PPK_Show, // #pragma pack(show), only supported by MSVC. 5460 PPK_Push, // #pragma pack(push, [identifier], [n]) 5461 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5462 }; 5463 5464 enum PragmaMSStructKind { 5465 PMSST_OFF, // #pragms ms_struct off 5466 PMSST_ON // #pragms ms_struct on 5467 }; 5468 5469 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5470 void ActOnPragmaPack(PragmaPackKind Kind, 5471 IdentifierInfo *Name, 5472 Expr *Alignment, 5473 SourceLocation PragmaLoc, 5474 SourceLocation LParenLoc, 5475 SourceLocation RParenLoc); 5476 5477 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5478 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5479 5480 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5481 void ActOnPragmaUnused(const Token &Identifier, 5482 Scope *curScope, 5483 SourceLocation PragmaLoc); 5484 5485 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5486 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5487 SourceLocation PragmaLoc); 5488 5489 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5490 SourceLocation Loc); 5491 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5492 5493 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5494 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5495 SourceLocation PragmaLoc, 5496 SourceLocation WeakNameLoc); 5497 5498 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5499 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5500 IdentifierInfo* AliasName, 5501 SourceLocation PragmaLoc, 5502 SourceLocation WeakNameLoc, 5503 SourceLocation AliasNameLoc); 5504 5505 /// ActOnPragmaFPContract - Called on well formed 5506 /// #pragma {STDC,OPENCL} FP_CONTRACT 5507 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5508 5509 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5510 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5511 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5512 5513 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5514 void AddMsStructLayoutForRecord(RecordDecl *RD); 5515 5516 /// FreePackedContext - Deallocate and null out PackContext. 5517 void FreePackedContext(); 5518 5519 /// PushNamespaceVisibilityAttr - Note that we've entered a 5520 /// namespace with a visibility attribute. 5521 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5522 5523 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5524 /// add an appropriate visibility attribute. 5525 void AddPushedVisibilityAttribute(Decl *RD); 5526 5527 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5528 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5529 void PopPragmaVisibility(); 5530 5531 /// FreeVisContext - Deallocate and null out VisContext. 5532 void FreeVisContext(); 5533 5534 /// AddCFAuditedAttribute - Check whether we're currently within 5535 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5536 /// the appropriate attribute. 5537 void AddCFAuditedAttribute(Decl *D); 5538 5539 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5540 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5541 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5542 5543 /// \brief The kind of conversion being performed. 5544 enum CheckedConversionKind { 5545 /// \brief An implicit conversion. 5546 CCK_ImplicitConversion, 5547 /// \brief A C-style cast. 5548 CCK_CStyleCast, 5549 /// \brief A functional-style cast. 5550 CCK_FunctionalCast, 5551 /// \brief A cast other than a C-style cast. 5552 CCK_OtherCast 5553 }; 5554 5555 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5556 /// cast. If there is already an implicit cast, merge into the existing one. 5557 /// If isLvalue, the result of the cast is an lvalue. 5558 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5559 ExprValueKind VK = VK_RValue, 5560 const CXXCastPath *BasePath = 0, 5561 CheckedConversionKind CCK 5562 = CCK_ImplicitConversion); 5563 5564 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5565 /// to the conversion from scalar type ScalarTy to the Boolean type. 5566 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5567 5568 /// IgnoredValueConversions - Given that an expression's result is 5569 /// syntactically ignored, perform any conversions that are 5570 /// required. 5571 ExprResult IgnoredValueConversions(Expr *E); 5572 5573 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5574 // functions and arrays to their respective pointers (C99 6.3.2.1). 5575 ExprResult UsualUnaryConversions(Expr *E); 5576 5577 // DefaultFunctionArrayConversion - converts functions and arrays 5578 // to their respective pointers (C99 6.3.2.1). 5579 ExprResult DefaultFunctionArrayConversion(Expr *E); 5580 5581 // DefaultFunctionArrayLvalueConversion - converts functions and 5582 // arrays to their respective pointers and performs the 5583 // lvalue-to-rvalue conversion. 5584 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5585 5586 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5587 // the operand. This is DefaultFunctionArrayLvalueConversion, 5588 // except that it assumes the operand isn't of function or array 5589 // type. 5590 ExprResult DefaultLvalueConversion(Expr *E); 5591 5592 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5593 // do not have a prototype. Integer promotions are performed on each 5594 // argument, and arguments that have type float are promoted to double. 5595 ExprResult DefaultArgumentPromotion(Expr *E); 5596 5597 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5598 enum VariadicCallType { 5599 VariadicFunction, 5600 VariadicBlock, 5601 VariadicMethod, 5602 VariadicConstructor, 5603 VariadicDoesNotApply 5604 }; 5605 5606 /// GatherArgumentsForCall - Collector argument expressions for various 5607 /// form of call prototypes. 5608 bool GatherArgumentsForCall(SourceLocation CallLoc, 5609 FunctionDecl *FDecl, 5610 const FunctionProtoType *Proto, 5611 unsigned FirstProtoArg, 5612 Expr **Args, unsigned NumArgs, 5613 SmallVector<Expr *, 8> &AllArgs, 5614 VariadicCallType CallType = VariadicDoesNotApply); 5615 5616 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5617 // will warn if the resulting type is not a POD type. 5618 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5619 FunctionDecl *FDecl); 5620 5621 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5622 // operands and then handles various conversions that are common to binary 5623 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5624 // routine returns the first non-arithmetic type found. The client is 5625 // responsible for emitting appropriate error diagnostics. 5626 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5627 bool IsCompAssign = false); 5628 5629 /// AssignConvertType - All of the 'assignment' semantic checks return this 5630 /// enum to indicate whether the assignment was allowed. These checks are 5631 /// done for simple assignments, as well as initialization, return from 5632 /// function, argument passing, etc. The query is phrased in terms of a 5633 /// source and destination type. 5634 enum AssignConvertType { 5635 /// Compatible - the types are compatible according to the standard. 5636 Compatible, 5637 5638 /// PointerToInt - The assignment converts a pointer to an int, which we 5639 /// accept as an extension. 5640 PointerToInt, 5641 5642 /// IntToPointer - The assignment converts an int to a pointer, which we 5643 /// accept as an extension. 5644 IntToPointer, 5645 5646 /// FunctionVoidPointer - The assignment is between a function pointer and 5647 /// void*, which the standard doesn't allow, but we accept as an extension. 5648 FunctionVoidPointer, 5649 5650 /// IncompatiblePointer - The assignment is between two pointers types that 5651 /// are not compatible, but we accept them as an extension. 5652 IncompatiblePointer, 5653 5654 /// IncompatiblePointer - The assignment is between two pointers types which 5655 /// point to integers which have a different sign, but are otherwise identical. 5656 /// This is a subset of the above, but broken out because it's by far the most 5657 /// common case of incompatible pointers. 5658 IncompatiblePointerSign, 5659 5660 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5661 /// c/v/r qualifiers, which we accept as an extension. 5662 CompatiblePointerDiscardsQualifiers, 5663 5664 /// IncompatiblePointerDiscardsQualifiers - The assignment 5665 /// discards qualifiers that we don't permit to be discarded, 5666 /// like address spaces. 5667 IncompatiblePointerDiscardsQualifiers, 5668 5669 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5670 /// nested pointer types, and the qualifiers other than the first two 5671 /// levels differ e.g. char ** -> const char **, but we accept them as an 5672 /// extension. 5673 IncompatibleNestedPointerQualifiers, 5674 5675 /// IncompatibleVectors - The assignment is between two vector types that 5676 /// have the same size, which we accept as an extension. 5677 IncompatibleVectors, 5678 5679 /// IntToBlockPointer - The assignment converts an int to a block 5680 /// pointer. We disallow this. 5681 IntToBlockPointer, 5682 5683 /// IncompatibleBlockPointer - The assignment is between two block 5684 /// pointers types that are not compatible. 5685 IncompatibleBlockPointer, 5686 5687 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5688 /// id type and something else (that is incompatible with it). For example, 5689 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5690 IncompatibleObjCQualifiedId, 5691 5692 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5693 /// object with __weak qualifier. 5694 IncompatibleObjCWeakRef, 5695 5696 /// Incompatible - We reject this conversion outright, it is invalid to 5697 /// represent it in the AST. 5698 Incompatible 5699 }; 5700 5701 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5702 /// assignment conversion type specified by ConvTy. This returns true if the 5703 /// conversion was invalid or false if the conversion was accepted. 5704 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5705 SourceLocation Loc, 5706 QualType DstType, QualType SrcType, 5707 Expr *SrcExpr, AssignmentAction Action, 5708 bool *Complained = 0); 5709 5710 /// CheckAssignmentConstraints - Perform type checking for assignment, 5711 /// argument passing, variable initialization, and function return values. 5712 /// C99 6.5.16. 5713 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5714 QualType LHSType, 5715 QualType RHSType); 5716 5717 /// Check assignment constraints and prepare for a conversion of the 5718 /// RHS to the LHS type. 5719 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5720 ExprResult &RHS, 5721 CastKind &Kind); 5722 5723 // CheckSingleAssignmentConstraints - Currently used by 5724 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5725 // this routine performs the default function/array converions. 5726 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5727 ExprResult &RHS, 5728 bool Diagnose = true); 5729 5730 // \brief If the lhs type is a transparent union, check whether we 5731 // can initialize the transparent union with the given expression. 5732 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5733 ExprResult &RHS); 5734 5735 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5736 5737 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5738 5739 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5740 AssignmentAction Action, 5741 bool AllowExplicit = false); 5742 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5743 AssignmentAction Action, 5744 bool AllowExplicit, 5745 ImplicitConversionSequence& ICS); 5746 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5747 const ImplicitConversionSequence& ICS, 5748 AssignmentAction Action, 5749 CheckedConversionKind CCK 5750 = CCK_ImplicitConversion); 5751 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5752 const StandardConversionSequence& SCS, 5753 AssignmentAction Action, 5754 CheckedConversionKind CCK); 5755 5756 /// the following "Check" methods will return a valid/converted QualType 5757 /// or a null QualType (indicating an error diagnostic was issued). 5758 5759 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5760 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5761 ExprResult &RHS); 5762 QualType CheckPointerToMemberOperands( // C++ 5.5 5763 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5764 SourceLocation OpLoc, bool isIndirect); 5765 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5766 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5767 bool IsDivide); 5768 QualType CheckRemainderOperands( // C99 6.5.5 5769 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5770 bool IsCompAssign = false); 5771 QualType CheckAdditionOperands( // C99 6.5.6 5772 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5773 QualType* CompLHSTy = 0); 5774 QualType CheckSubtractionOperands( // C99 6.5.6 5775 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5776 QualType* CompLHSTy = 0); 5777 QualType CheckShiftOperands( // C99 6.5.7 5778 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5779 bool IsCompAssign = false); 5780 QualType CheckCompareOperands( // C99 6.5.8/9 5781 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5782 bool isRelational); 5783 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5784 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5785 bool IsCompAssign = false); 5786 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5787 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5788 // CheckAssignmentOperands is used for both simple and compound assignment. 5789 // For simple assignment, pass both expressions and a null converted type. 5790 // For compound assignment, pass both expressions and the converted type. 5791 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5792 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5793 5794 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5795 UnaryOperatorKind Opcode, Expr *Op); 5796 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5797 BinaryOperatorKind Opcode, 5798 Expr *LHS, Expr *RHS); 5799 ExprResult checkPseudoObjectRValue(Expr *E); 5800 5801 QualType CheckConditionalOperands( // C99 6.5.15 5802 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5803 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5804 QualType CXXCheckConditionalOperands( // C++ 5.16 5805 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5806 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5807 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5808 bool *NonStandardCompositeType = 0); 5809 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5810 bool *NonStandardCompositeType = 0) { 5811 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5812 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5813 E1 = Owned(E1Tmp); 5814 E2 = Owned(E2Tmp); 5815 return Composite; 5816 } 5817 5818 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5819 SourceLocation QuestionLoc); 5820 5821 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5822 SourceLocation QuestionLoc); 5823 5824 /// type checking for vector binary operators. 5825 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5826 SourceLocation Loc, bool IsCompAssign); 5827 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5828 SourceLocation Loc, bool isRelational); 5829 5830 /// type checking declaration initializers (C99 6.7.8) 5831 bool CheckForConstantInitializer(Expr *e, QualType t); 5832 5833 // type checking C++ declaration initializers (C++ [dcl.init]). 5834 5835 /// ReferenceCompareResult - Expresses the result of comparing two 5836 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5837 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5838 enum ReferenceCompareResult { 5839 /// Ref_Incompatible - The two types are incompatible, so direct 5840 /// reference binding is not possible. 5841 Ref_Incompatible = 0, 5842 /// Ref_Related - The two types are reference-related, which means 5843 /// that their unqualified forms (T1 and T2) are either the same 5844 /// or T1 is a base class of T2. 5845 Ref_Related, 5846 /// Ref_Compatible_With_Added_Qualification - The two types are 5847 /// reference-compatible with added qualification, meaning that 5848 /// they are reference-compatible and the qualifiers on T1 (cv1) 5849 /// are greater than the qualifiers on T2 (cv2). 5850 Ref_Compatible_With_Added_Qualification, 5851 /// Ref_Compatible - The two types are reference-compatible and 5852 /// have equivalent qualifiers (cv1 == cv2). 5853 Ref_Compatible 5854 }; 5855 5856 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5857 QualType T1, QualType T2, 5858 bool &DerivedToBase, 5859 bool &ObjCConversion, 5860 bool &ObjCLifetimeConversion); 5861 5862 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5863 Expr *CastExpr, CastKind &CastKind, 5864 ExprValueKind &VK, CXXCastPath &Path); 5865 5866 // CheckVectorCast - check type constraints for vectors. 5867 // Since vectors are an extension, there are no C standard reference for this. 5868 // We allow casting between vectors and integer datatypes of the same size. 5869 // returns true if the cast is invalid 5870 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5871 CastKind &Kind); 5872 5873 // CheckExtVectorCast - check type constraints for extended vectors. 5874 // Since vectors are an extension, there are no C standard reference for this. 5875 // We allow casting between vectors and integer datatypes of the same size, 5876 // or vectors and the element type of that vector. 5877 // returns the cast expr 5878 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5879 CastKind &Kind); 5880 5881 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5882 SourceLocation LParenLoc, 5883 Expr *CastExpr, 5884 SourceLocation RParenLoc); 5885 5886 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 5887 5888 /// \brief Checks for invalid conversions and casts between 5889 /// retainable pointers and other pointer kinds. 5890 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 5891 QualType castType, Expr *&op, 5892 CheckedConversionKind CCK); 5893 5894 Expr *stripARCUnbridgedCast(Expr *e); 5895 void diagnoseARCUnbridgedCast(Expr *e); 5896 5897 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5898 QualType ExprType); 5899 5900 /// checkRetainCycles - Check whether an Objective-C message send 5901 /// might create an obvious retain cycle. 5902 void checkRetainCycles(ObjCMessageExpr *msg); 5903 void checkRetainCycles(Expr *receiver, Expr *argument); 5904 5905 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5906 /// to weak/__unsafe_unretained type. 5907 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5908 5909 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5910 /// to weak/__unsafe_unretained expression. 5911 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5912 5913 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5914 /// \param Method - May be null. 5915 /// \param [out] ReturnType - The return type of the send. 5916 /// \return true iff there were any incompatible types. 5917 bool CheckMessageArgumentTypes(QualType ReceiverType, 5918 Expr **Args, unsigned NumArgs, Selector Sel, 5919 ObjCMethodDecl *Method, bool isClassMessage, 5920 bool isSuperMessage, 5921 SourceLocation lbrac, SourceLocation rbrac, 5922 QualType &ReturnType, ExprValueKind &VK); 5923 5924 /// \brief Determine the result of a message send expression based on 5925 /// the type of the receiver, the method expected to receive the message, 5926 /// and the form of the message send. 5927 QualType getMessageSendResultType(QualType ReceiverType, 5928 ObjCMethodDecl *Method, 5929 bool isClassMessage, bool isSuperMessage); 5930 5931 /// \brief If the given expression involves a message send to a method 5932 /// with a related result type, emit a note describing what happened. 5933 void EmitRelatedResultTypeNote(const Expr *E); 5934 5935 /// CheckBooleanCondition - Diagnose problems involving the use of 5936 /// the given expression as a boolean condition (e.g. in an if 5937 /// statement). Also performs the standard function and array 5938 /// decays, possibly changing the input variable. 5939 /// 5940 /// \param Loc - A location associated with the condition, e.g. the 5941 /// 'if' keyword. 5942 /// \return true iff there were any errors 5943 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5944 5945 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5946 Expr *SubExpr); 5947 5948 /// DiagnoseAssignmentAsCondition - Given that an expression is 5949 /// being used as a boolean condition, warn if it's an assignment. 5950 void DiagnoseAssignmentAsCondition(Expr *E); 5951 5952 /// \brief Redundant parentheses over an equality comparison can indicate 5953 /// that the user intended an assignment used as condition. 5954 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5955 5956 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5957 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5958 5959 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5960 /// the specified width and sign. If an overflow occurs, detect it and emit 5961 /// the specified diagnostic. 5962 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5963 unsigned NewWidth, bool NewSign, 5964 SourceLocation Loc, unsigned DiagID); 5965 5966 /// Checks that the Objective-C declaration is declared in the global scope. 5967 /// Emits an error and marks the declaration as invalid if it's not declared 5968 /// in the global scope. 5969 bool CheckObjCDeclScope(Decl *D); 5970 5971 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5972 /// and reports the appropriate diagnostics. Returns false on success. 5973 /// Can optionally return the value of the expression. 5974 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5975 5976 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5977 /// the correct width, and that the field type is valid. 5978 /// Returns false on success. 5979 /// Can optionally return whether the bit-field is of width 0 5980 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5981 QualType FieldTy, const Expr *BitWidth, 5982 bool *ZeroWidth = 0); 5983 5984 enum CUDAFunctionTarget { 5985 CFT_Device, 5986 CFT_Global, 5987 CFT_Host, 5988 CFT_HostDevice 5989 }; 5990 5991 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 5992 5993 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 5994 CUDAFunctionTarget CalleeTarget); 5995 5996 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 5997 return CheckCUDATarget(IdentifyCUDATarget(Caller), 5998 IdentifyCUDATarget(Callee)); 5999 } 6000 6001 /// \name Code completion 6002 //@{ 6003 /// \brief Describes the context in which code completion occurs. 6004 enum ParserCompletionContext { 6005 /// \brief Code completion occurs at top-level or namespace context. 6006 PCC_Namespace, 6007 /// \brief Code completion occurs within a class, struct, or union. 6008 PCC_Class, 6009 /// \brief Code completion occurs within an Objective-C interface, protocol, 6010 /// or category. 6011 PCC_ObjCInterface, 6012 /// \brief Code completion occurs within an Objective-C implementation or 6013 /// category implementation 6014 PCC_ObjCImplementation, 6015 /// \brief Code completion occurs within the list of instance variables 6016 /// in an Objective-C interface, protocol, category, or implementation. 6017 PCC_ObjCInstanceVariableList, 6018 /// \brief Code completion occurs following one or more template 6019 /// headers. 6020 PCC_Template, 6021 /// \brief Code completion occurs following one or more template 6022 /// headers within a class. 6023 PCC_MemberTemplate, 6024 /// \brief Code completion occurs within an expression. 6025 PCC_Expression, 6026 /// \brief Code completion occurs within a statement, which may 6027 /// also be an expression or a declaration. 6028 PCC_Statement, 6029 /// \brief Code completion occurs at the beginning of the 6030 /// initialization statement (or expression) in a for loop. 6031 PCC_ForInit, 6032 /// \brief Code completion occurs within the condition of an if, 6033 /// while, switch, or for statement. 6034 PCC_Condition, 6035 /// \brief Code completion occurs within the body of a function on a 6036 /// recovery path, where we do not have a specific handle on our position 6037 /// in the grammar. 6038 PCC_RecoveryInFunction, 6039 /// \brief Code completion occurs where only a type is permitted. 6040 PCC_Type, 6041 /// \brief Code completion occurs in a parenthesized expression, which 6042 /// might also be a type cast. 6043 PCC_ParenthesizedExpression, 6044 /// \brief Code completion occurs within a sequence of declaration 6045 /// specifiers within a function, method, or block. 6046 PCC_LocalDeclarationSpecifiers 6047 }; 6048 6049 void CodeCompleteOrdinaryName(Scope *S, 6050 ParserCompletionContext CompletionContext); 6051 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6052 bool AllowNonIdentifiers, 6053 bool AllowNestedNameSpecifiers); 6054 6055 struct CodeCompleteExpressionData; 6056 void CodeCompleteExpression(Scope *S, 6057 const CodeCompleteExpressionData &Data); 6058 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6059 SourceLocation OpLoc, 6060 bool IsArrow); 6061 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6062 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6063 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6064 void CodeCompleteCase(Scope *S); 6065 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6066 void CodeCompleteInitializer(Scope *S, Decl *D); 6067 void CodeCompleteReturn(Scope *S); 6068 void CodeCompleteAfterIf(Scope *S); 6069 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6070 6071 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6072 bool EnteringContext); 6073 void CodeCompleteUsing(Scope *S); 6074 void CodeCompleteUsingDirective(Scope *S); 6075 void CodeCompleteNamespaceDecl(Scope *S); 6076 void CodeCompleteNamespaceAliasDecl(Scope *S); 6077 void CodeCompleteOperatorName(Scope *S); 6078 void CodeCompleteConstructorInitializer(Decl *Constructor, 6079 CXXCtorInitializer** Initializers, 6080 unsigned NumInitializers); 6081 6082 void CodeCompleteObjCAtDirective(Scope *S); 6083 void CodeCompleteObjCAtVisibility(Scope *S); 6084 void CodeCompleteObjCAtStatement(Scope *S); 6085 void CodeCompleteObjCAtExpression(Scope *S); 6086 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6087 void CodeCompleteObjCPropertyGetter(Scope *S); 6088 void CodeCompleteObjCPropertySetter(Scope *S); 6089 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6090 bool IsParameter); 6091 void CodeCompleteObjCMessageReceiver(Scope *S); 6092 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6093 IdentifierInfo **SelIdents, 6094 unsigned NumSelIdents, 6095 bool AtArgumentExpression); 6096 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6097 IdentifierInfo **SelIdents, 6098 unsigned NumSelIdents, 6099 bool AtArgumentExpression, 6100 bool IsSuper = false); 6101 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6102 IdentifierInfo **SelIdents, 6103 unsigned NumSelIdents, 6104 bool AtArgumentExpression, 6105 ObjCInterfaceDecl *Super = 0); 6106 void CodeCompleteObjCForCollection(Scope *S, 6107 DeclGroupPtrTy IterationVar); 6108 void CodeCompleteObjCSelector(Scope *S, 6109 IdentifierInfo **SelIdents, 6110 unsigned NumSelIdents); 6111 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6112 unsigned NumProtocols); 6113 void CodeCompleteObjCProtocolDecl(Scope *S); 6114 void CodeCompleteObjCInterfaceDecl(Scope *S); 6115 void CodeCompleteObjCSuperclass(Scope *S, 6116 IdentifierInfo *ClassName, 6117 SourceLocation ClassNameLoc); 6118 void CodeCompleteObjCImplementationDecl(Scope *S); 6119 void CodeCompleteObjCInterfaceCategory(Scope *S, 6120 IdentifierInfo *ClassName, 6121 SourceLocation ClassNameLoc); 6122 void CodeCompleteObjCImplementationCategory(Scope *S, 6123 IdentifierInfo *ClassName, 6124 SourceLocation ClassNameLoc); 6125 void CodeCompleteObjCPropertyDefinition(Scope *S); 6126 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6127 IdentifierInfo *PropertyName); 6128 void CodeCompleteObjCMethodDecl(Scope *S, 6129 bool IsInstanceMethod, 6130 ParsedType ReturnType); 6131 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6132 bool IsInstanceMethod, 6133 bool AtParameterName, 6134 ParsedType ReturnType, 6135 IdentifierInfo **SelIdents, 6136 unsigned NumSelIdents); 6137 void CodeCompletePreprocessorDirective(bool InConditional); 6138 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6139 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6140 void CodeCompletePreprocessorExpression(); 6141 void CodeCompletePreprocessorMacroArgument(Scope *S, 6142 IdentifierInfo *Macro, 6143 MacroInfo *MacroInfo, 6144 unsigned Argument); 6145 void CodeCompleteNaturalLanguage(); 6146 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6147 SmallVectorImpl<CodeCompletionResult> &Results); 6148 //@} 6149 6150 //===--------------------------------------------------------------------===// 6151 // Extra semantic analysis beyond the C type system 6152 6153public: 6154 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6155 unsigned ByteNo) const; 6156 6157private: 6158 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6159 bool isSubscript=false, bool AllowOnePastEnd=true); 6160 void CheckArrayAccess(const Expr *E); 6161 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6162 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6163 6164 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6165 bool CheckObjCString(Expr *Arg); 6166 6167 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6168 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6169 6170 bool SemaBuiltinVAStart(CallExpr *TheCall); 6171 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6172 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6173 6174public: 6175 // Used by C++ template instantiation. 6176 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6177 6178private: 6179 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6180 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6181 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6182 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6183 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6184 AtomicExpr::AtomicOp Op); 6185 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6186 llvm::APSInt &Result); 6187 6188 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6189 bool HasVAListArg, unsigned format_idx, 6190 unsigned firstDataArg, bool isPrintf, 6191 bool inFunctionCall = true); 6192 6193 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6194 const CallExpr *TheCall, bool HasVAListArg, 6195 unsigned format_idx, unsigned firstDataArg, 6196 bool isPrintf, bool inFunctionCall); 6197 6198 void CheckNonNullArguments(const NonNullAttr *NonNull, 6199 const Expr * const *ExprArgs, 6200 SourceLocation CallSiteLoc); 6201 6202 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6203 unsigned format_idx, unsigned firstDataArg, 6204 bool isPrintf); 6205 6206 /// \brief Enumeration used to describe which of the memory setting or copying 6207 /// functions is being checked by \c CheckMemaccessArguments(). 6208 enum CheckedMemoryFunction { 6209 CMF_Memset, 6210 CMF_Memcpy, 6211 CMF_Memmove, 6212 CMF_Memcmp, 6213 CMF_Strncpy, 6214 CMF_Strncmp, 6215 CMF_Strncasecmp, 6216 CMF_Strncat, 6217 CMF_Strndup 6218 }; 6219 6220 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6221 IdentifierInfo *FnName); 6222 6223 void CheckStrlcpycatArguments(const CallExpr *Call, 6224 IdentifierInfo *FnName); 6225 6226 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6227 SourceLocation ReturnLoc); 6228 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6229 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6230 6231 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6232 Expr *Init); 6233 6234 /// \brief The parser's current scope. 6235 /// 6236 /// The parser maintains this state here. 6237 Scope *CurScope; 6238 6239protected: 6240 friend class Parser; 6241 friend class InitializationSequence; 6242 friend class ASTReader; 6243 friend class ASTWriter; 6244 6245public: 6246 /// \brief Retrieve the parser's current scope. 6247 /// 6248 /// This routine must only be used when it is certain that semantic analysis 6249 /// and the parser are in precisely the same context, which is not the case 6250 /// when, e.g., we are performing any kind of template instantiation. 6251 /// Therefore, the only safe places to use this scope are in the parser 6252 /// itself and in routines directly invoked from the parser and *never* from 6253 /// template substitution or instantiation. 6254 Scope *getCurScope() const { return CurScope; } 6255 6256 Decl *getObjCDeclContext() const; 6257 6258 DeclContext *getCurLexicalContext() const { 6259 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6260 } 6261 6262 AvailabilityResult getCurContextAvailability() const; 6263}; 6264 6265/// \brief RAII object that enters a new expression evaluation context. 6266class EnterExpressionEvaluationContext { 6267 Sema &Actions; 6268 6269public: 6270 EnterExpressionEvaluationContext(Sema &Actions, 6271 Sema::ExpressionEvaluationContext NewContext) 6272 : Actions(Actions) { 6273 Actions.PushExpressionEvaluationContext(NewContext); 6274 } 6275 6276 ~EnterExpressionEvaluationContext() { 6277 Actions.PopExpressionEvaluationContext(); 6278 } 6279}; 6280 6281} // end namespace clang 6282 6283#endif 6284