ASTContext.h revision 0ddaeb9b031070ec64afe92d9892875ac44df427
1//===--- ASTContext.h - Context to hold long-lived AST nodes ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_ASTCONTEXT_H 15#define LLVM_CLANG_AST_ASTCONTEXT_H 16 17#include "clang/Basic/AddressSpaces.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/LangOptions.h" 20#include "clang/Basic/OperatorKinds.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/VersionTuple.h" 23#include "clang/AST/Decl.h" 24#include "clang/AST/NestedNameSpecifier.h" 25#include "clang/AST/PrettyPrinter.h" 26#include "clang/AST/TemplateName.h" 27#include "clang/AST/Type.h" 28#include "clang/AST/CanonicalType.h" 29#include "clang/AST/UsuallyTinyPtrVector.h" 30#include "llvm/ADT/DenseMap.h" 31#include "llvm/ADT/FoldingSet.h" 32#include "llvm/ADT/IntrusiveRefCntPtr.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/Support/Allocator.h" 36#include <vector> 37 38namespace llvm { 39 struct fltSemantics; 40} 41 42namespace clang { 43 class FileManager; 44 class ASTRecordLayout; 45 class BlockExpr; 46 class CharUnits; 47 class DiagnosticsEngine; 48 class Expr; 49 class ExternalASTSource; 50 class ASTMutationListener; 51 class IdentifierTable; 52 class SelectorTable; 53 class SourceManager; 54 class TargetInfo; 55 class CXXABI; 56 // Decls 57 class DeclContext; 58 class CXXMethodDecl; 59 class CXXRecordDecl; 60 class Decl; 61 class FieldDecl; 62 class MangleContext; 63 class ObjCIvarDecl; 64 class ObjCIvarRefExpr; 65 class ObjCPropertyDecl; 66 class ParmVarDecl; 67 class RecordDecl; 68 class StoredDeclsMap; 69 class TagDecl; 70 class TemplateTemplateParmDecl; 71 class TemplateTypeParmDecl; 72 class TranslationUnitDecl; 73 class TypeDecl; 74 class TypedefNameDecl; 75 class UsingDecl; 76 class UsingShadowDecl; 77 class UnresolvedSetIterator; 78 79 namespace Builtin { class Context; } 80 81/// ASTContext - This class holds long-lived AST nodes (such as types and 82/// decls) that can be referred to throughout the semantic analysis of a file. 83class ASTContext : public llvm::RefCountedBase<ASTContext> { 84 ASTContext &this_() { return *this; } 85 86 mutable std::vector<Type*> Types; 87 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 88 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 89 mutable llvm::FoldingSet<PointerType> PointerTypes; 90 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 91 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 92 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 93 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 94 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 95 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 96 mutable std::vector<VariableArrayType*> VariableArrayTypes; 97 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 98 mutable llvm::FoldingSet<DependentSizedExtVectorType> 99 DependentSizedExtVectorTypes; 100 mutable llvm::FoldingSet<VectorType> VectorTypes; 101 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 102 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 103 FunctionProtoTypes; 104 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 105 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 106 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 107 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 108 SubstTemplateTypeParmTypes; 109 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 110 SubstTemplateTypeParmPackTypes; 111 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 112 TemplateSpecializationTypes; 113 mutable llvm::FoldingSet<ParenType> ParenTypes; 114 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 115 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 116 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 117 ASTContext&> 118 DependentTemplateSpecializationTypes; 119 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 120 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 121 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 122 mutable llvm::FoldingSet<AutoType> AutoTypes; 123 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 124 llvm::FoldingSet<AttributedType> AttributedTypes; 125 126 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 127 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 128 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 129 SubstTemplateTemplateParms; 130 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 131 ASTContext&> 132 SubstTemplateTemplateParmPacks; 133 134 /// \brief The set of nested name specifiers. 135 /// 136 /// This set is managed by the NestedNameSpecifier class. 137 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 138 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 139 friend class NestedNameSpecifier; 140 141 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 142 /// This is lazily created. This is intentionally not serialized. 143 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 144 ASTRecordLayouts; 145 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 146 ObjCLayouts; 147 148 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 149 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 150 151 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 152 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 153 154 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 155 /// interface. 156 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 157 158 /// \brief Mapping from __block VarDecls to their copy initialization expr. 159 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 160 161 /// \brief Mapping from class scope functions specialization to their 162 /// template patterns. 163 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 164 ClassScopeSpecializationPattern; 165 166 /// \brief Representation of a "canonical" template template parameter that 167 /// is used in canonical template names. 168 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 169 TemplateTemplateParmDecl *Parm; 170 171 public: 172 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 173 : Parm(Parm) { } 174 175 TemplateTemplateParmDecl *getParam() const { return Parm; } 176 177 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 178 179 static void Profile(llvm::FoldingSetNodeID &ID, 180 TemplateTemplateParmDecl *Parm); 181 }; 182 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 183 CanonTemplateTemplateParms; 184 185 TemplateTemplateParmDecl * 186 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 187 188 /// \brief The typedef for the __int128_t type. 189 mutable TypedefDecl *Int128Decl; 190 191 /// \brief The typedef for the __uint128_t type. 192 mutable TypedefDecl *UInt128Decl; 193 194 /// BuiltinVaListType - built-in va list type. 195 /// This is initially null and set by Sema::LazilyCreateBuiltin when 196 /// a builtin that takes a valist is encountered. 197 QualType BuiltinVaListType; 198 199 /// \brief The typedef for the predefined 'id' type. 200 mutable TypedefDecl *ObjCIdDecl; 201 202 /// \brief The typedef for the predefined 'SEL' type. 203 mutable TypedefDecl *ObjCSelDecl; 204 205 QualType ObjCProtoType; 206 const RecordType *ProtoStructType; 207 208 /// \brief The typedef for the predefined 'Class' type. 209 mutable TypedefDecl *ObjCClassDecl; 210 211 // Typedefs which may be provided defining the structure of Objective-C 212 // pseudo-builtins 213 QualType ObjCIdRedefinitionType; 214 QualType ObjCClassRedefinitionType; 215 QualType ObjCSelRedefinitionType; 216 217 QualType ObjCConstantStringType; 218 mutable RecordDecl *CFConstantStringTypeDecl; 219 220 /// \brief The typedef declaration for the Objective-C "instancetype" type. 221 TypedefDecl *ObjCInstanceTypeDecl; 222 223 /// \brief The type for the C FILE type. 224 TypeDecl *FILEDecl; 225 226 /// \brief The type for the C jmp_buf type. 227 TypeDecl *jmp_bufDecl; 228 229 /// \brief The type for the C sigjmp_buf type. 230 TypeDecl *sigjmp_bufDecl; 231 232 /// \brief Type for the Block descriptor for Blocks CodeGen. 233 /// 234 /// Since this is only used for generation of debug info, it is not 235 /// serialized. 236 mutable RecordDecl *BlockDescriptorType; 237 238 /// \brief Type for the Block descriptor for Blocks CodeGen. 239 /// 240 /// Since this is only used for generation of debug info, it is not 241 /// serialized. 242 mutable RecordDecl *BlockDescriptorExtendedType; 243 244 /// \brief Declaration for the CUDA cudaConfigureCall function. 245 FunctionDecl *cudaConfigureCallDecl; 246 247 TypeSourceInfo NullTypeSourceInfo; 248 249 /// \brief Keeps track of all declaration attributes. 250 /// 251 /// Since so few decls have attrs, we keep them in a hash map instead of 252 /// wasting space in the Decl class. 253 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 254 255 /// \brief Keeps track of the static data member templates from which 256 /// static data members of class template specializations were instantiated. 257 /// 258 /// This data structure stores the mapping from instantiations of static 259 /// data members to the static data member representations within the 260 /// class template from which they were instantiated along with the kind 261 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 262 /// 263 /// Given the following example: 264 /// 265 /// \code 266 /// template<typename T> 267 /// struct X { 268 /// static T value; 269 /// }; 270 /// 271 /// template<typename T> 272 /// T X<T>::value = T(17); 273 /// 274 /// int *x = &X<int>::value; 275 /// \endcode 276 /// 277 /// This mapping will contain an entry that maps from the VarDecl for 278 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 279 /// class template X) and will be marked TSK_ImplicitInstantiation. 280 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 281 InstantiatedFromStaticDataMember; 282 283 /// \brief Keeps track of the declaration from which a UsingDecl was 284 /// created during instantiation. The source declaration is always 285 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 286 /// UnresolvedUsingTypenameDecl. 287 /// 288 /// For example: 289 /// \code 290 /// template<typename T> 291 /// struct A { 292 /// void f(); 293 /// }; 294 /// 295 /// template<typename T> 296 /// struct B : A<T> { 297 /// using A<T>::f; 298 /// }; 299 /// 300 /// template struct B<int>; 301 /// \endcode 302 /// 303 /// This mapping will contain an entry that maps from the UsingDecl in 304 /// B<int> to the UnresolvedUsingDecl in B<T>. 305 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 306 307 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 308 InstantiatedFromUsingShadowDecl; 309 310 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 311 312 /// \brief Mapping that stores the methods overridden by a given C++ 313 /// member function. 314 /// 315 /// Since most C++ member functions aren't virtual and therefore 316 /// don't override anything, we store the overridden functions in 317 /// this map on the side rather than within the CXXMethodDecl structure. 318 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 319 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 320 321 /// \brief Mapping that stores parameterIndex values for ParmVarDecls 322 /// when that value exceeds the bitfield size of 323 /// ParmVarDeclBits.ParameterIndex. 324 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 325 ParameterIndexTable ParamIndices; 326 327 TranslationUnitDecl *TUDecl; 328 329 /// SourceMgr - The associated SourceManager object. 330 SourceManager &SourceMgr; 331 332 /// LangOpts - The language options used to create the AST associated with 333 /// this ASTContext object. 334 LangOptions &LangOpts; 335 336 /// \brief The allocator used to create AST objects. 337 /// 338 /// AST objects are never destructed; rather, all memory associated with the 339 /// AST objects will be released when the ASTContext itself is destroyed. 340 mutable llvm::BumpPtrAllocator BumpAlloc; 341 342 /// \brief Allocator for partial diagnostics. 343 PartialDiagnostic::StorageAllocator DiagAllocator; 344 345 /// \brief The current C++ ABI. 346 llvm::OwningPtr<CXXABI> ABI; 347 CXXABI *createCXXABI(const TargetInfo &T); 348 349 /// \brief The logical -> physical address space map. 350 const LangAS::Map *AddrSpaceMap; 351 352 friend class ASTDeclReader; 353 friend class ASTReader; 354 friend class ASTWriter; 355 356 const TargetInfo *Target; 357 clang::PrintingPolicy PrintingPolicy; 358 359public: 360 IdentifierTable &Idents; 361 SelectorTable &Selectors; 362 Builtin::Context &BuiltinInfo; 363 mutable DeclarationNameTable DeclarationNames; 364 llvm::OwningPtr<ExternalASTSource> ExternalSource; 365 ASTMutationListener *Listener; 366 367 clang::PrintingPolicy getPrintingPolicy() const { return PrintingPolicy; } 368 369 void setPrintingPolicy(clang::PrintingPolicy Policy) { 370 PrintingPolicy = Policy; 371 } 372 373 SourceManager& getSourceManager() { return SourceMgr; } 374 const SourceManager& getSourceManager() const { return SourceMgr; } 375 void *Allocate(unsigned Size, unsigned Align = 8) const { 376 return BumpAlloc.Allocate(Size, Align); 377 } 378 void Deallocate(void *Ptr) const { } 379 380 /// Return the total amount of physical memory allocated for representing 381 /// AST nodes and type information. 382 size_t getASTAllocatedMemory() const { 383 return BumpAlloc.getTotalMemory(); 384 } 385 /// Return the total memory used for various side tables. 386 size_t getSideTableAllocatedMemory() const; 387 388 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 389 return DiagAllocator; 390 } 391 392 const TargetInfo &getTargetInfo() const { return *Target; } 393 394 const LangOptions& getLangOptions() const { return LangOpts; } 395 396 DiagnosticsEngine &getDiagnostics() const; 397 398 FullSourceLoc getFullLoc(SourceLocation Loc) const { 399 return FullSourceLoc(Loc,SourceMgr); 400 } 401 402 /// \brief Retrieve the attributes for the given declaration. 403 AttrVec& getDeclAttrs(const Decl *D); 404 405 /// \brief Erase the attributes corresponding to the given declaration. 406 void eraseDeclAttrs(const Decl *D); 407 408 /// \brief If this variable is an instantiated static data member of a 409 /// class template specialization, returns the templated static data member 410 /// from which it was instantiated. 411 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 412 const VarDecl *Var); 413 414 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 415 416 void setClassScopeSpecializationPattern(FunctionDecl *FD, 417 FunctionDecl *Pattern); 418 419 /// \brief Note that the static data member \p Inst is an instantiation of 420 /// the static data member template \p Tmpl of a class template. 421 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 422 TemplateSpecializationKind TSK, 423 SourceLocation PointOfInstantiation = SourceLocation()); 424 425 /// \brief If the given using decl is an instantiation of a 426 /// (possibly unresolved) using decl from a template instantiation, 427 /// return it. 428 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 429 430 /// \brief Remember that the using decl \p Inst is an instantiation 431 /// of the using decl \p Pattern of a class template. 432 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 433 434 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 435 UsingShadowDecl *Pattern); 436 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 437 438 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 439 440 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 441 442 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 443 /// bitfield which follows the non-bitfield 'LastFD'. 444 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 445 const FieldDecl *LastFD) const; 446 447 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 448 /// bitfield which follows the bitfield 'LastFD'. 449 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 450 const FieldDecl *LastFD) const; 451 452 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 453 /// bitfield which follows the bitfield 'LastFD'. 454 bool BitfieldFollowsBitfield(const FieldDecl *FD, 455 const FieldDecl *LastFD) const; 456 457 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 458 /// bitfield which follows the bitfield 'LastFD'. 459 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 460 const FieldDecl *LastFD) const; 461 462 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 463 /// bitfield which follows the none bitfield 'LastFD'. 464 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 465 const FieldDecl *LastFD) const; 466 467 // Access to the set of methods overridden by the given C++ method. 468 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 469 overridden_cxx_method_iterator 470 overridden_methods_begin(const CXXMethodDecl *Method) const; 471 472 overridden_cxx_method_iterator 473 overridden_methods_end(const CXXMethodDecl *Method) const; 474 475 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 476 477 /// \brief Note that the given C++ \p Method overrides the given \p 478 /// Overridden method. 479 void addOverriddenMethod(const CXXMethodDecl *Method, 480 const CXXMethodDecl *Overridden); 481 482 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 483 484 485 // Builtin Types. 486 CanQualType VoidTy; 487 CanQualType BoolTy; 488 CanQualType CharTy; 489 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 490 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 491 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 492 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 493 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 494 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 495 CanQualType FloatTy, DoubleTy, LongDoubleTy; 496 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 497 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 498 CanQualType VoidPtrTy, NullPtrTy; 499 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 500 CanQualType ARCUnbridgedCastTy; 501 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 502 503 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 504 mutable QualType AutoDeductTy; // Deduction against 'auto'. 505 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 506 507 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 508 IdentifierTable &idents, SelectorTable &sels, 509 Builtin::Context &builtins, 510 unsigned size_reserve, 511 bool DelayInitialization = false); 512 513 ~ASTContext(); 514 515 /// \brief Attach an external AST source to the AST context. 516 /// 517 /// The external AST source provides the ability to load parts of 518 /// the abstract syntax tree as needed from some external storage, 519 /// e.g., a precompiled header. 520 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 521 522 /// \brief Retrieve a pointer to the external AST source associated 523 /// with this AST context, if any. 524 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 525 526 /// \brief Attach an AST mutation listener to the AST context. 527 /// 528 /// The AST mutation listener provides the ability to track modifications to 529 /// the abstract syntax tree entities committed after they were initially 530 /// created. 531 void setASTMutationListener(ASTMutationListener *Listener) { 532 this->Listener = Listener; 533 } 534 535 /// \brief Retrieve a pointer to the AST mutation listener associated 536 /// with this AST context, if any. 537 ASTMutationListener *getASTMutationListener() const { return Listener; } 538 539 void PrintStats() const; 540 const std::vector<Type*>& getTypes() const { return Types; } 541 542 /// \brief Retrieve the declaration for the 128-bit signed integer type. 543 TypedefDecl *getInt128Decl() const; 544 545 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 546 TypedefDecl *getUInt128Decl() const; 547 548 //===--------------------------------------------------------------------===// 549 // Type Constructors 550 //===--------------------------------------------------------------------===// 551 552private: 553 /// getExtQualType - Return a type with extended qualifiers. 554 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 555 556 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 557 558public: 559 /// getAddSpaceQualType - Return the uniqued reference to the type for an 560 /// address space qualified type with the specified type and address space. 561 /// The resulting type has a union of the qualifiers from T and the address 562 /// space. If T already has an address space specifier, it is silently 563 /// replaced. 564 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 565 566 /// getObjCGCQualType - Returns the uniqued reference to the type for an 567 /// objc gc qualified type. The retulting type has a union of the qualifiers 568 /// from T and the gc attribute. 569 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 570 571 /// getRestrictType - Returns the uniqued reference to the type for a 572 /// 'restrict' qualified type. The resulting type has a union of the 573 /// qualifiers from T and 'restrict'. 574 QualType getRestrictType(QualType T) const { 575 return T.withFastQualifiers(Qualifiers::Restrict); 576 } 577 578 /// getVolatileType - Returns the uniqued reference to the type for a 579 /// 'volatile' qualified type. The resulting type has a union of the 580 /// qualifiers from T and 'volatile'. 581 QualType getVolatileType(QualType T) const { 582 return T.withFastQualifiers(Qualifiers::Volatile); 583 } 584 585 /// getConstType - Returns the uniqued reference to the type for a 586 /// 'const' qualified type. The resulting type has a union of the 587 /// qualifiers from T and 'const'. 588 /// 589 /// It can be reasonably expected that this will always be 590 /// equivalent to calling T.withConst(). 591 QualType getConstType(QualType T) const { return T.withConst(); } 592 593 /// adjustFunctionType - Change the ExtInfo on a function type. 594 const FunctionType *adjustFunctionType(const FunctionType *Fn, 595 FunctionType::ExtInfo EInfo); 596 597 /// getComplexType - Return the uniqued reference to the type for a complex 598 /// number with the specified element type. 599 QualType getComplexType(QualType T) const; 600 CanQualType getComplexType(CanQualType T) const { 601 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 602 } 603 604 /// getPointerType - Return the uniqued reference to the type for a pointer to 605 /// the specified type. 606 QualType getPointerType(QualType T) const; 607 CanQualType getPointerType(CanQualType T) const { 608 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 609 } 610 611 /// getAtomicType - Return the uniqued reference to the atomic type for 612 /// the specified type. 613 QualType getAtomicType(QualType T) const; 614 615 /// getBlockPointerType - Return the uniqued reference to the type for a block 616 /// of the specified type. 617 QualType getBlockPointerType(QualType T) const; 618 619 /// This gets the struct used to keep track of the descriptor for pointer to 620 /// blocks. 621 QualType getBlockDescriptorType() const; 622 623 /// This gets the struct used to keep track of the extended descriptor for 624 /// pointer to blocks. 625 QualType getBlockDescriptorExtendedType() const; 626 627 void setcudaConfigureCallDecl(FunctionDecl *FD) { 628 cudaConfigureCallDecl = FD; 629 } 630 FunctionDecl *getcudaConfigureCallDecl() { 631 return cudaConfigureCallDecl; 632 } 633 634 /// This builds the struct used for __block variables. 635 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 636 637 /// Returns true iff we need copy/dispose helpers for the given type. 638 bool BlockRequiresCopying(QualType Ty) const; 639 640 /// getLValueReferenceType - Return the uniqued reference to the type for an 641 /// lvalue reference to the specified type. 642 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 643 const; 644 645 /// getRValueReferenceType - Return the uniqued reference to the type for an 646 /// rvalue reference to the specified type. 647 QualType getRValueReferenceType(QualType T) const; 648 649 /// getMemberPointerType - Return the uniqued reference to the type for a 650 /// member pointer to the specified type in the specified class. The class 651 /// is a Type because it could be a dependent name. 652 QualType getMemberPointerType(QualType T, const Type *Cls) const; 653 654 /// getVariableArrayType - Returns a non-unique reference to the type for a 655 /// variable array of the specified element type. 656 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 657 ArrayType::ArraySizeModifier ASM, 658 unsigned IndexTypeQuals, 659 SourceRange Brackets) const; 660 661 /// getDependentSizedArrayType - Returns a non-unique reference to 662 /// the type for a dependently-sized array of the specified element 663 /// type. FIXME: We will need these to be uniqued, or at least 664 /// comparable, at some point. 665 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 666 ArrayType::ArraySizeModifier ASM, 667 unsigned IndexTypeQuals, 668 SourceRange Brackets) const; 669 670 /// getIncompleteArrayType - Returns a unique reference to the type for a 671 /// incomplete array of the specified element type. 672 QualType getIncompleteArrayType(QualType EltTy, 673 ArrayType::ArraySizeModifier ASM, 674 unsigned IndexTypeQuals) const; 675 676 /// getConstantArrayType - Return the unique reference to the type for a 677 /// constant array of the specified element type. 678 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 679 ArrayType::ArraySizeModifier ASM, 680 unsigned IndexTypeQuals) const; 681 682 /// getVariableArrayDecayedType - Returns a vla type where known sizes 683 /// are replaced with [*]. 684 QualType getVariableArrayDecayedType(QualType Ty) const; 685 686 /// getVectorType - Return the unique reference to a vector type of 687 /// the specified element type and size. VectorType must be a built-in type. 688 QualType getVectorType(QualType VectorType, unsigned NumElts, 689 VectorType::VectorKind VecKind) const; 690 691 /// getExtVectorType - Return the unique reference to an extended vector type 692 /// of the specified element type and size. VectorType must be a built-in 693 /// type. 694 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 695 696 /// getDependentSizedExtVectorType - Returns a non-unique reference to 697 /// the type for a dependently-sized vector of the specified element 698 /// type. FIXME: We will need these to be uniqued, or at least 699 /// comparable, at some point. 700 QualType getDependentSizedExtVectorType(QualType VectorType, 701 Expr *SizeExpr, 702 SourceLocation AttrLoc) const; 703 704 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 705 /// 706 QualType getFunctionNoProtoType(QualType ResultTy, 707 const FunctionType::ExtInfo &Info) const; 708 709 QualType getFunctionNoProtoType(QualType ResultTy) const { 710 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 711 } 712 713 /// getFunctionType - Return a normal function type with a typed 714 /// argument list. 715 QualType getFunctionType(QualType ResultTy, 716 const QualType *Args, unsigned NumArgs, 717 const FunctionProtoType::ExtProtoInfo &EPI) const; 718 719 /// getTypeDeclType - Return the unique reference to the type for 720 /// the specified type declaration. 721 QualType getTypeDeclType(const TypeDecl *Decl, 722 const TypeDecl *PrevDecl = 0) const { 723 assert(Decl && "Passed null for Decl param"); 724 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 725 726 if (PrevDecl) { 727 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 728 Decl->TypeForDecl = PrevDecl->TypeForDecl; 729 return QualType(PrevDecl->TypeForDecl, 0); 730 } 731 732 return getTypeDeclTypeSlow(Decl); 733 } 734 735 /// getTypedefType - Return the unique reference to the type for the 736 /// specified typedef-name decl. 737 QualType getTypedefType(const TypedefNameDecl *Decl, 738 QualType Canon = QualType()) const; 739 740 QualType getRecordType(const RecordDecl *Decl) const; 741 742 QualType getEnumType(const EnumDecl *Decl) const; 743 744 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 745 746 QualType getAttributedType(AttributedType::Kind attrKind, 747 QualType modifiedType, 748 QualType equivalentType); 749 750 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 751 QualType Replacement) const; 752 QualType getSubstTemplateTypeParmPackType( 753 const TemplateTypeParmType *Replaced, 754 const TemplateArgument &ArgPack); 755 756 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 757 bool ParameterPack, 758 TemplateTypeParmDecl *ParmDecl = 0) const; 759 760 QualType getTemplateSpecializationType(TemplateName T, 761 const TemplateArgument *Args, 762 unsigned NumArgs, 763 QualType Canon = QualType()) const; 764 765 QualType getCanonicalTemplateSpecializationType(TemplateName T, 766 const TemplateArgument *Args, 767 unsigned NumArgs) const; 768 769 QualType getTemplateSpecializationType(TemplateName T, 770 const TemplateArgumentListInfo &Args, 771 QualType Canon = QualType()) const; 772 773 TypeSourceInfo * 774 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 775 const TemplateArgumentListInfo &Args, 776 QualType Canon = QualType()) const; 777 778 QualType getParenType(QualType NamedType) const; 779 780 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 781 NestedNameSpecifier *NNS, 782 QualType NamedType) const; 783 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 784 NestedNameSpecifier *NNS, 785 const IdentifierInfo *Name, 786 QualType Canon = QualType()) const; 787 788 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 789 NestedNameSpecifier *NNS, 790 const IdentifierInfo *Name, 791 const TemplateArgumentListInfo &Args) const; 792 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 793 NestedNameSpecifier *NNS, 794 const IdentifierInfo *Name, 795 unsigned NumArgs, 796 const TemplateArgument *Args) const; 797 798 QualType getPackExpansionType(QualType Pattern, 799 llvm::Optional<unsigned> NumExpansions); 800 801 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const; 802 803 QualType getObjCObjectType(QualType Base, 804 ObjCProtocolDecl * const *Protocols, 805 unsigned NumProtocols) const; 806 807 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 808 /// for the given ObjCObjectType. 809 QualType getObjCObjectPointerType(QualType OIT) const; 810 811 /// getTypeOfType - GCC extension. 812 QualType getTypeOfExprType(Expr *e) const; 813 QualType getTypeOfType(QualType t) const; 814 815 /// getDecltypeType - C++0x decltype. 816 QualType getDecltypeType(Expr *e) const; 817 818 /// getUnaryTransformType - unary type transforms 819 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 820 UnaryTransformType::UTTKind UKind) const; 821 822 /// getAutoType - C++0x deduced auto type. 823 QualType getAutoType(QualType DeducedType) const; 824 825 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 826 QualType getAutoDeductType() const; 827 828 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 829 QualType getAutoRRefDeductType() const; 830 831 /// getTagDeclType - Return the unique reference to the type for the 832 /// specified TagDecl (struct/union/class/enum) decl. 833 QualType getTagDeclType(const TagDecl *Decl) const; 834 835 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 836 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 837 CanQualType getSizeType() const; 838 839 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 840 /// returns a type compatible with the type defined in <stddef.h> as defined 841 /// by the target. 842 QualType getWCharType() const { return WCharTy; } 843 844 /// getSignedWCharType - Return the type of "signed wchar_t". 845 /// Used when in C++, as a GCC extension. 846 QualType getSignedWCharType() const; 847 848 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 849 /// Used when in C++, as a GCC extension. 850 QualType getUnsignedWCharType() const; 851 852 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 853 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 854 QualType getPointerDiffType() const; 855 856 // getCFConstantStringType - Return the C structure type used to represent 857 // constant CFStrings. 858 QualType getCFConstantStringType() const; 859 860 /// Get the structure type used to representation CFStrings, or NULL 861 /// if it hasn't yet been built. 862 QualType getRawCFConstantStringType() const { 863 if (CFConstantStringTypeDecl) 864 return getTagDeclType(CFConstantStringTypeDecl); 865 return QualType(); 866 } 867 void setCFConstantStringType(QualType T); 868 869 // This setter/getter represents the ObjC type for an NSConstantString. 870 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 871 QualType getObjCConstantStringInterface() const { 872 return ObjCConstantStringType; 873 } 874 875 /// \brief Retrieve the type that 'id' has been defined to, which may be 876 /// different from the built-in 'id' if 'id' has been typedef'd. 877 QualType getObjCIdRedefinitionType() const { 878 if (ObjCIdRedefinitionType.isNull()) 879 return getObjCIdType(); 880 return ObjCIdRedefinitionType; 881 } 882 883 /// \brief Set the user-written type that redefines 'id'. 884 void setObjCIdRedefinitionType(QualType RedefType) { 885 ObjCIdRedefinitionType = RedefType; 886 } 887 888 /// \brief Retrieve the type that 'Class' has been defined to, which may be 889 /// different from the built-in 'Class' if 'Class' has been typedef'd. 890 QualType getObjCClassRedefinitionType() const { 891 if (ObjCClassRedefinitionType.isNull()) 892 return getObjCClassType(); 893 return ObjCClassRedefinitionType; 894 } 895 896 /// \brief Set the user-written type that redefines 'SEL'. 897 void setObjCClassRedefinitionType(QualType RedefType) { 898 ObjCClassRedefinitionType = RedefType; 899 } 900 901 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 902 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 903 QualType getObjCSelRedefinitionType() const { 904 if (ObjCSelRedefinitionType.isNull()) 905 return getObjCSelType(); 906 return ObjCSelRedefinitionType; 907 } 908 909 910 /// \brief Set the user-written type that redefines 'SEL'. 911 void setObjCSelRedefinitionType(QualType RedefType) { 912 ObjCSelRedefinitionType = RedefType; 913 } 914 915 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 916 /// otherwise, returns a NULL type; 917 QualType getObjCInstanceType() { 918 return getTypeDeclType(getObjCInstanceTypeDecl()); 919 } 920 921 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 922 /// "instancetype" type. 923 TypedefDecl *getObjCInstanceTypeDecl(); 924 925 /// \brief Set the type for the C FILE type. 926 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 927 928 /// \brief Retrieve the C FILE type. 929 QualType getFILEType() const { 930 if (FILEDecl) 931 return getTypeDeclType(FILEDecl); 932 return QualType(); 933 } 934 935 /// \brief Set the type for the C jmp_buf type. 936 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 937 this->jmp_bufDecl = jmp_bufDecl; 938 } 939 940 /// \brief Retrieve the C jmp_buf type. 941 QualType getjmp_bufType() const { 942 if (jmp_bufDecl) 943 return getTypeDeclType(jmp_bufDecl); 944 return QualType(); 945 } 946 947 /// \brief Set the type for the C sigjmp_buf type. 948 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 949 this->sigjmp_bufDecl = sigjmp_bufDecl; 950 } 951 952 /// \brief Retrieve the C sigjmp_buf type. 953 QualType getsigjmp_bufType() const { 954 if (sigjmp_bufDecl) 955 return getTypeDeclType(sigjmp_bufDecl); 956 return QualType(); 957 } 958 959 /// \brief The result type of logical operations, '<', '>', '!=', etc. 960 QualType getLogicalOperationType() const { 961 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 962 } 963 964 /// getObjCEncodingForType - Emit the ObjC type encoding for the 965 /// given type into \arg S. If \arg NameFields is specified then 966 /// record field names are also encoded. 967 void getObjCEncodingForType(QualType t, std::string &S, 968 const FieldDecl *Field=0) const; 969 970 void getLegacyIntegralTypeEncoding(QualType &t) const; 971 972 // Put the string version of type qualifiers into S. 973 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 974 std::string &S) const; 975 976 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 977 /// function. This is in the same format as Objective-C method encodings. 978 /// 979 /// \returns true if an error occurred (e.g., because one of the parameter 980 /// types is incomplete), false otherwise. 981 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 982 983 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 984 /// declaration. 985 /// 986 /// \returns true if an error occurred (e.g., because one of the parameter 987 /// types is incomplete), false otherwise. 988 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S) 989 const; 990 991 /// getObjCEncodingForBlock - Return the encoded type for this block 992 /// declaration. 993 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 994 995 /// getObjCEncodingForPropertyDecl - Return the encoded type for 996 /// this method declaration. If non-NULL, Container must be either 997 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 998 /// only be NULL when getting encodings for protocol properties. 999 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1000 const Decl *Container, 1001 std::string &S) const; 1002 1003 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1004 ObjCProtocolDecl *rProto) const; 1005 1006 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 1007 /// purpose in characters. 1008 CharUnits getObjCEncodingTypeSize(QualType t) const; 1009 1010 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 1011 /// in Objective-C. 1012 TypedefDecl *getObjCIdDecl() const; 1013 1014 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 1015 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 1016 QualType getObjCIdType() const { 1017 return getTypeDeclType(getObjCIdDecl()); 1018 } 1019 1020 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1021 /// in Objective-C. 1022 TypedefDecl *getObjCSelDecl() const; 1023 1024 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1025 /// 'SEL' type. 1026 QualType getObjCSelType() const { 1027 return getTypeDeclType(getObjCSelDecl()); 1028 } 1029 1030 void setObjCProtoType(QualType QT); 1031 QualType getObjCProtoType() const { return ObjCProtoType; } 1032 1033 /// \brief Retrieve the typedef declaration corresponding to the predefined 1034 /// Objective-C 'Class' type. 1035 TypedefDecl *getObjCClassDecl() const; 1036 1037 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1038 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1039 /// struct. 1040 QualType getObjCClassType() const { 1041 return getTypeDeclType(getObjCClassDecl()); 1042 } 1043 1044 void setBuiltinVaListType(QualType T); 1045 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 1046 1047 /// getCVRQualifiedType - Returns a type with additional const, 1048 /// volatile, or restrict qualifiers. 1049 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1050 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1051 } 1052 1053 /// getQualifiedType - Returns a type with additional qualifiers. 1054 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1055 if (!Qs.hasNonFastQualifiers()) 1056 return T.withFastQualifiers(Qs.getFastQualifiers()); 1057 QualifierCollector Qc(Qs); 1058 const Type *Ptr = Qc.strip(T); 1059 return getExtQualType(Ptr, Qc); 1060 } 1061 1062 /// getQualifiedType - Returns a type with additional qualifiers. 1063 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1064 if (!Qs.hasNonFastQualifiers()) 1065 return QualType(T, Qs.getFastQualifiers()); 1066 return getExtQualType(T, Qs); 1067 } 1068 1069 /// getLifetimeQualifiedType - Returns a type with the given 1070 /// lifetime qualifier. 1071 QualType getLifetimeQualifiedType(QualType type, 1072 Qualifiers::ObjCLifetime lifetime) { 1073 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1074 assert(lifetime != Qualifiers::OCL_None); 1075 1076 Qualifiers qs; 1077 qs.addObjCLifetime(lifetime); 1078 return getQualifiedType(type, qs); 1079 } 1080 1081 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1082 SourceLocation NameLoc) const; 1083 1084 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1085 UnresolvedSetIterator End) const; 1086 1087 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1088 bool TemplateKeyword, 1089 TemplateDecl *Template) const; 1090 1091 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1092 const IdentifierInfo *Name) const; 1093 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1094 OverloadedOperatorKind Operator) const; 1095 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1096 TemplateName replacement) const; 1097 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1098 const TemplateArgument &ArgPack) const; 1099 1100 enum GetBuiltinTypeError { 1101 GE_None, //< No error 1102 GE_Missing_stdio, //< Missing a type from <stdio.h> 1103 GE_Missing_setjmp //< Missing a type from <setjmp.h> 1104 }; 1105 1106 /// GetBuiltinType - Return the type for the specified builtin. If 1107 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1108 /// arguments to the builtin that are required to be integer constant 1109 /// expressions. 1110 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1111 unsigned *IntegerConstantArgs = 0) const; 1112 1113private: 1114 CanQualType getFromTargetType(unsigned Type) const; 1115 1116 //===--------------------------------------------------------------------===// 1117 // Type Predicates. 1118 //===--------------------------------------------------------------------===// 1119 1120public: 1121 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1122 /// garbage collection attribute. 1123 /// 1124 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1125 1126 /// areCompatibleVectorTypes - Return true if the given vector types 1127 /// are of the same unqualified type or if they are equivalent to the same 1128 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1129 /// Neon) types. 1130 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1131 1132 /// isObjCNSObjectType - Return true if this is an NSObject object with 1133 /// its NSObject attribute set. 1134 static bool isObjCNSObjectType(QualType Ty) { 1135 return Ty->isObjCNSObjectType(); 1136 } 1137 1138 //===--------------------------------------------------------------------===// 1139 // Type Sizing and Analysis 1140 //===--------------------------------------------------------------------===// 1141 1142 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1143 /// scalar floating point type. 1144 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1145 1146 /// getTypeInfo - Get the size and alignment of the specified complete type in 1147 /// bits. 1148 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1149 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1150 return getTypeInfo(T.getTypePtr()); 1151 } 1152 1153 /// getTypeSize - Return the size of the specified type, in bits. This method 1154 /// does not work on incomplete types. 1155 uint64_t getTypeSize(QualType T) const { 1156 return getTypeInfo(T).first; 1157 } 1158 uint64_t getTypeSize(const Type *T) const { 1159 return getTypeInfo(T).first; 1160 } 1161 1162 /// getCharWidth - Return the size of the character type, in bits 1163 uint64_t getCharWidth() const { 1164 return getTypeSize(CharTy); 1165 } 1166 1167 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1168 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1169 1170 /// toBits - Convert a size in characters to a size in bits. 1171 int64_t toBits(CharUnits CharSize) const; 1172 1173 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1174 /// This method does not work on incomplete types. 1175 CharUnits getTypeSizeInChars(QualType T) const; 1176 CharUnits getTypeSizeInChars(const Type *T) const; 1177 1178 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1179 /// This method does not work on incomplete types. 1180 unsigned getTypeAlign(QualType T) const { 1181 return getTypeInfo(T).second; 1182 } 1183 unsigned getTypeAlign(const Type *T) const { 1184 return getTypeInfo(T).second; 1185 } 1186 1187 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1188 /// characters. This method does not work on incomplete types. 1189 CharUnits getTypeAlignInChars(QualType T) const; 1190 CharUnits getTypeAlignInChars(const Type *T) const; 1191 1192 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1193 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1194 1195 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1196 /// type for the current target in bits. This can be different than the ABI 1197 /// alignment in cases where it is beneficial for performance to overalign 1198 /// a data type. 1199 unsigned getPreferredTypeAlign(const Type *T) const; 1200 1201 /// getDeclAlign - Return a conservative estimate of the alignment of 1202 /// the specified decl. Note that bitfields do not have a valid alignment, so 1203 /// this method will assert on them. 1204 /// If @p RefAsPointee, references are treated like their underlying type 1205 /// (for alignof), else they're treated like pointers (for CodeGen). 1206 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1207 1208 /// getASTRecordLayout - Get or compute information about the layout of the 1209 /// specified record (struct/union/class), which indicates its size and field 1210 /// position information. 1211 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1212 1213 /// getASTObjCInterfaceLayout - Get or compute information about the 1214 /// layout of the specified Objective-C interface. 1215 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1216 const; 1217 1218 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS) const; 1219 1220 /// getASTObjCImplementationLayout - Get or compute information about 1221 /// the layout of the specified Objective-C implementation. This may 1222 /// differ from the interface if synthesized ivars are present. 1223 const ASTRecordLayout & 1224 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1225 1226 /// getKeyFunction - Get the key function for the given record decl, or NULL 1227 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1228 /// section 5.2.3: 1229 /// 1230 /// ...the first non-pure virtual function that is not inline at the point 1231 /// of class definition. 1232 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1233 1234 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1235 1236 MangleContext *createMangleContext(); 1237 1238 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1239 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1240 1241 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1242 void CollectInheritedProtocols(const Decl *CDecl, 1243 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1244 1245 //===--------------------------------------------------------------------===// 1246 // Type Operators 1247 //===--------------------------------------------------------------------===// 1248 1249 /// getCanonicalType - Return the canonical (structural) type corresponding to 1250 /// the specified potentially non-canonical type. The non-canonical version 1251 /// of a type may have many "decorated" versions of types. Decorators can 1252 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1253 /// to be free of any of these, allowing two canonical types to be compared 1254 /// for exact equality with a simple pointer comparison. 1255 CanQualType getCanonicalType(QualType T) const { 1256 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1257 } 1258 1259 const Type *getCanonicalType(const Type *T) const { 1260 return T->getCanonicalTypeInternal().getTypePtr(); 1261 } 1262 1263 /// getCanonicalParamType - Return the canonical parameter type 1264 /// corresponding to the specific potentially non-canonical one. 1265 /// Qualifiers are stripped off, functions are turned into function 1266 /// pointers, and arrays decay one level into pointers. 1267 CanQualType getCanonicalParamType(QualType T) const; 1268 1269 /// \brief Determine whether the given types are equivalent. 1270 bool hasSameType(QualType T1, QualType T2) { 1271 return getCanonicalType(T1) == getCanonicalType(T2); 1272 } 1273 1274 /// \brief Returns this type as a completely-unqualified array type, 1275 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1276 /// sugaring from the types, similar to the behavior of 1277 /// QualType::getUnqualifiedType(). 1278 /// 1279 /// \param T is the qualified type, which may be an ArrayType 1280 /// 1281 /// \param Quals will receive the full set of qualifiers that were 1282 /// applied to the array. 1283 /// 1284 /// \returns if this is an array type, the completely unqualified array type 1285 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1286 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1287 1288 /// \brief Determine whether the given types are equivalent after 1289 /// cvr-qualifiers have been removed. 1290 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1291 return getCanonicalType(T1).getTypePtr() == 1292 getCanonicalType(T2).getTypePtr(); 1293 } 1294 1295 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1296 1297 /// \brief Retrieves the "canonical" nested name specifier for a 1298 /// given nested name specifier. 1299 /// 1300 /// The canonical nested name specifier is a nested name specifier 1301 /// that uniquely identifies a type or namespace within the type 1302 /// system. For example, given: 1303 /// 1304 /// \code 1305 /// namespace N { 1306 /// struct S { 1307 /// template<typename T> struct X { typename T* type; }; 1308 /// }; 1309 /// } 1310 /// 1311 /// template<typename T> struct Y { 1312 /// typename N::S::X<T>::type member; 1313 /// }; 1314 /// \endcode 1315 /// 1316 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1317 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1318 /// by declarations in the type system and the canonical type for 1319 /// the template type parameter 'T' is template-param-0-0. 1320 NestedNameSpecifier * 1321 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1322 1323 /// \brief Retrieves the default calling convention to use for 1324 /// C++ instance methods. 1325 CallingConv getDefaultMethodCallConv(); 1326 1327 /// \brief Retrieves the canonical representation of the given 1328 /// calling convention. 1329 CallingConv getCanonicalCallConv(CallingConv CC) const { 1330 if (!LangOpts.MRTD && CC == CC_C) 1331 return CC_Default; 1332 return CC; 1333 } 1334 1335 /// \brief Determines whether two calling conventions name the same 1336 /// calling convention. 1337 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1338 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1339 } 1340 1341 /// \brief Retrieves the "canonical" template name that refers to a 1342 /// given template. 1343 /// 1344 /// The canonical template name is the simplest expression that can 1345 /// be used to refer to a given template. For most templates, this 1346 /// expression is just the template declaration itself. For example, 1347 /// the template std::vector can be referred to via a variety of 1348 /// names---std::vector, ::std::vector, vector (if vector is in 1349 /// scope), etc.---but all of these names map down to the same 1350 /// TemplateDecl, which is used to form the canonical template name. 1351 /// 1352 /// Dependent template names are more interesting. Here, the 1353 /// template name could be something like T::template apply or 1354 /// std::allocator<T>::template rebind, where the nested name 1355 /// specifier itself is dependent. In this case, the canonical 1356 /// template name uses the shortest form of the dependent 1357 /// nested-name-specifier, which itself contains all canonical 1358 /// types, values, and templates. 1359 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1360 1361 /// \brief Determine whether the given template names refer to the same 1362 /// template. 1363 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1364 1365 /// \brief Retrieve the "canonical" template argument. 1366 /// 1367 /// The canonical template argument is the simplest template argument 1368 /// (which may be a type, value, expression, or declaration) that 1369 /// expresses the value of the argument. 1370 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1371 const; 1372 1373 /// Type Query functions. If the type is an instance of the specified class, 1374 /// return the Type pointer for the underlying maximally pretty type. This 1375 /// is a member of ASTContext because this may need to do some amount of 1376 /// canonicalization, e.g. to move type qualifiers into the element type. 1377 const ArrayType *getAsArrayType(QualType T) const; 1378 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1379 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1380 } 1381 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1382 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1383 } 1384 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1385 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1386 } 1387 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1388 const { 1389 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1390 } 1391 1392 /// getBaseElementType - Returns the innermost element type of an array type. 1393 /// For example, will return "int" for int[m][n] 1394 QualType getBaseElementType(const ArrayType *VAT) const; 1395 1396 /// getBaseElementType - Returns the innermost element type of a type 1397 /// (which needn't actually be an array type). 1398 QualType getBaseElementType(QualType QT) const; 1399 1400 /// getConstantArrayElementCount - Returns number of constant array elements. 1401 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1402 1403 /// \brief Perform adjustment on the parameter type of a function. 1404 /// 1405 /// This routine adjusts the given parameter type @p T to the actual 1406 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1407 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1408 QualType getAdjustedParameterType(QualType T); 1409 1410 /// \brief Retrieve the parameter type as adjusted for use in the signature 1411 /// of a function, decaying array and function types and removing top-level 1412 /// cv-qualifiers. 1413 QualType getSignatureParameterType(QualType T); 1414 1415 /// getArrayDecayedType - Return the properly qualified result of decaying the 1416 /// specified array type to a pointer. This operation is non-trivial when 1417 /// handling typedefs etc. The canonical type of "T" must be an array type, 1418 /// this returns a pointer to a properly qualified element of the array. 1419 /// 1420 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1421 QualType getArrayDecayedType(QualType T) const; 1422 1423 /// getPromotedIntegerType - Returns the type that Promotable will 1424 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1425 /// integer type. 1426 QualType getPromotedIntegerType(QualType PromotableType) const; 1427 1428 /// \brief Recurses in pointer/array types until it finds an objc retainable 1429 /// type and returns its ownership. 1430 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1431 1432 /// \brief Whether this is a promotable bitfield reference according 1433 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1434 /// 1435 /// \returns the type this bit-field will promote to, or NULL if no 1436 /// promotion occurs. 1437 QualType isPromotableBitField(Expr *E) const; 1438 1439 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1440 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1441 /// LHS < RHS, return -1. 1442 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1443 1444 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1445 /// point types, ignoring the domain of the type (i.e. 'double' == 1446 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1447 /// LHS < RHS, return -1. 1448 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1449 1450 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1451 /// point or a complex type (based on typeDomain/typeSize). 1452 /// 'typeDomain' is a real floating point or complex type. 1453 /// 'typeSize' is a real floating point or complex type. 1454 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1455 QualType typeDomain) const; 1456 1457 unsigned getTargetAddressSpace(QualType T) const { 1458 return getTargetAddressSpace(T.getQualifiers()); 1459 } 1460 1461 unsigned getTargetAddressSpace(Qualifiers Q) const { 1462 return getTargetAddressSpace(Q.getAddressSpace()); 1463 } 1464 1465 unsigned getTargetAddressSpace(unsigned AS) const { 1466 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1467 return AS; 1468 else 1469 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1470 } 1471 1472private: 1473 // Helper for integer ordering 1474 unsigned getIntegerRank(const Type *T) const; 1475 1476public: 1477 1478 //===--------------------------------------------------------------------===// 1479 // Type Compatibility Predicates 1480 //===--------------------------------------------------------------------===// 1481 1482 /// Compatibility predicates used to check assignment expressions. 1483 bool typesAreCompatible(QualType T1, QualType T2, 1484 bool CompareUnqualified = false); // C99 6.2.7p1 1485 1486 bool propertyTypesAreCompatible(QualType, QualType); 1487 bool typesAreBlockPointerCompatible(QualType, QualType); 1488 1489 bool isObjCIdType(QualType T) const { 1490 return T == getObjCIdType(); 1491 } 1492 bool isObjCClassType(QualType T) const { 1493 return T == getObjCClassType(); 1494 } 1495 bool isObjCSelType(QualType T) const { 1496 return T == getObjCSelType(); 1497 } 1498 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1499 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1500 bool ForCompare); 1501 1502 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1503 1504 // Check the safety of assignment from LHS to RHS 1505 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1506 const ObjCObjectPointerType *RHSOPT); 1507 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1508 const ObjCObjectType *RHS); 1509 bool canAssignObjCInterfacesInBlockPointer( 1510 const ObjCObjectPointerType *LHSOPT, 1511 const ObjCObjectPointerType *RHSOPT, 1512 bool BlockReturnType); 1513 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1514 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1515 const ObjCObjectPointerType *RHSOPT); 1516 bool canBindObjCObjectType(QualType To, QualType From); 1517 1518 // Functions for calculating composite types 1519 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1520 bool Unqualified = false, bool BlockReturnType = false); 1521 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1522 bool Unqualified = false); 1523 QualType mergeFunctionArgumentTypes(QualType, QualType, 1524 bool OfBlockPointer=false, 1525 bool Unqualified = false); 1526 QualType mergeTransparentUnionType(QualType, QualType, 1527 bool OfBlockPointer=false, 1528 bool Unqualified = false); 1529 1530 QualType mergeObjCGCQualifiers(QualType, QualType); 1531 1532 bool FunctionTypesMatchOnNSConsumedAttrs( 1533 const FunctionProtoType *FromFunctionType, 1534 const FunctionProtoType *ToFunctionType); 1535 1536 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1537 ObjCLayouts[CD] = 0; 1538 } 1539 1540 //===--------------------------------------------------------------------===// 1541 // Integer Predicates 1542 //===--------------------------------------------------------------------===// 1543 1544 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1545 // of bits in an integer type excluding any padding bits. 1546 unsigned getIntWidth(QualType T) const; 1547 1548 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1549 // unsigned integer type. This method takes a signed type, and returns the 1550 // corresponding unsigned integer type. 1551 QualType getCorrespondingUnsignedType(QualType T); 1552 1553 //===--------------------------------------------------------------------===// 1554 // Type Iterators. 1555 //===--------------------------------------------------------------------===// 1556 1557 typedef std::vector<Type*>::iterator type_iterator; 1558 typedef std::vector<Type*>::const_iterator const_type_iterator; 1559 1560 type_iterator types_begin() { return Types.begin(); } 1561 type_iterator types_end() { return Types.end(); } 1562 const_type_iterator types_begin() const { return Types.begin(); } 1563 const_type_iterator types_end() const { return Types.end(); } 1564 1565 //===--------------------------------------------------------------------===// 1566 // Integer Values 1567 //===--------------------------------------------------------------------===// 1568 1569 /// MakeIntValue - Make an APSInt of the appropriate width and 1570 /// signedness for the given \arg Value and integer \arg Type. 1571 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1572 llvm::APSInt Res(getIntWidth(Type), 1573 !Type->isSignedIntegerOrEnumerationType()); 1574 Res = Value; 1575 return Res; 1576 } 1577 1578 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1579 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1580 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1581 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1582 1583 /// \brief returns true if there is at lease one @implementation in TU. 1584 bool AnyObjCImplementation() { 1585 return !ObjCImpls.empty(); 1586 } 1587 1588 /// \brief Set the implementation of ObjCInterfaceDecl. 1589 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1590 ObjCImplementationDecl *ImplD); 1591 /// \brief Set the implementation of ObjCCategoryDecl. 1592 void setObjCImplementation(ObjCCategoryDecl *CatD, 1593 ObjCCategoryImplDecl *ImplD); 1594 1595 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1596 /// interface, or null if non exists. 1597 const ObjCMethodDecl *getObjCMethodRedeclaration( 1598 const ObjCMethodDecl *MD) const { 1599 llvm::DenseMap<const ObjCMethodDecl*, const ObjCMethodDecl*>::const_iterator 1600 I = ObjCMethodRedecls.find(MD); 1601 if (I == ObjCMethodRedecls.end()) 1602 return 0; 1603 return I->second; 1604 } 1605 1606 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1607 const ObjCMethodDecl *Redecl) { 1608 ObjCMethodRedecls[MD] = Redecl; 1609 } 1610 1611 /// \brief Set the copy inialization expression of a block var decl. 1612 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1613 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1614 /// none exists. 1615 Expr *getBlockVarCopyInits(const VarDecl*VD); 1616 1617 /// \brief Allocate an uninitialized TypeSourceInfo. 1618 /// 1619 /// The caller should initialize the memory held by TypeSourceInfo using 1620 /// the TypeLoc wrappers. 1621 /// 1622 /// \param T the type that will be the basis for type source info. This type 1623 /// should refer to how the declarator was written in source code, not to 1624 /// what type semantic analysis resolved the declarator to. 1625 /// 1626 /// \param Size the size of the type info to create, or 0 if the size 1627 /// should be calculated based on the type. 1628 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1629 1630 /// \brief Allocate a TypeSourceInfo where all locations have been 1631 /// initialized to a given location, which defaults to the empty 1632 /// location. 1633 TypeSourceInfo * 1634 getTrivialTypeSourceInfo(QualType T, 1635 SourceLocation Loc = SourceLocation()) const; 1636 1637 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1638 1639 /// \brief Add a deallocation callback that will be invoked when the 1640 /// ASTContext is destroyed. 1641 /// 1642 /// \brief Callback A callback function that will be invoked on destruction. 1643 /// 1644 /// \brief Data Pointer data that will be provided to the callback function 1645 /// when it is called. 1646 void AddDeallocation(void (*Callback)(void*), void *Data); 1647 1648 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1649 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1650 1651 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1652 /// lazily, only when used; this is only relevant for function or file scoped 1653 /// var definitions. 1654 /// 1655 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1656 /// it is not used. 1657 bool DeclMustBeEmitted(const Decl *D); 1658 1659 1660 /// \brief Used by ParmVarDecl to store on the side the 1661 /// index of the parameter when it exceeds the size of the normal bitfield. 1662 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1663 1664 /// \brief Used by ParmVarDecl to retrieve on the side the 1665 /// index of the parameter when it exceeds the size of the normal bitfield. 1666 unsigned getParameterIndex(const ParmVarDecl *D) const; 1667 1668 //===--------------------------------------------------------------------===// 1669 // Statistics 1670 //===--------------------------------------------------------------------===// 1671 1672 /// \brief The number of implicitly-declared default constructors. 1673 static unsigned NumImplicitDefaultConstructors; 1674 1675 /// \brief The number of implicitly-declared default constructors for 1676 /// which declarations were built. 1677 static unsigned NumImplicitDefaultConstructorsDeclared; 1678 1679 /// \brief The number of implicitly-declared copy constructors. 1680 static unsigned NumImplicitCopyConstructors; 1681 1682 /// \brief The number of implicitly-declared copy constructors for 1683 /// which declarations were built. 1684 static unsigned NumImplicitCopyConstructorsDeclared; 1685 1686 /// \brief The number of implicitly-declared move constructors. 1687 static unsigned NumImplicitMoveConstructors; 1688 1689 /// \brief The number of implicitly-declared move constructors for 1690 /// which declarations were built. 1691 static unsigned NumImplicitMoveConstructorsDeclared; 1692 1693 /// \brief The number of implicitly-declared copy assignment operators. 1694 static unsigned NumImplicitCopyAssignmentOperators; 1695 1696 /// \brief The number of implicitly-declared copy assignment operators for 1697 /// which declarations were built. 1698 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1699 1700 /// \brief The number of implicitly-declared move assignment operators. 1701 static unsigned NumImplicitMoveAssignmentOperators; 1702 1703 /// \brief The number of implicitly-declared move assignment operators for 1704 /// which declarations were built. 1705 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1706 1707 /// \brief The number of implicitly-declared destructors. 1708 static unsigned NumImplicitDestructors; 1709 1710 /// \brief The number of implicitly-declared destructors for which 1711 /// declarations were built. 1712 static unsigned NumImplicitDestructorsDeclared; 1713 1714private: 1715 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1716 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1717 1718public: 1719 /// \brief Initialize built-in types. 1720 /// 1721 /// This routine may only be invoked once for a given ASTContext object. 1722 /// It is normally invoked by the ASTContext constructor. However, the 1723 /// constructor can be asked to delay initialization, which places the burden 1724 /// of calling this function on the user of that object. 1725 /// 1726 /// \param Target The target 1727 void InitBuiltinTypes(const TargetInfo &Target); 1728 1729private: 1730 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1731 1732 // Return the ObjC type encoding for a given type. 1733 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1734 bool ExpandPointedToStructures, 1735 bool ExpandStructures, 1736 const FieldDecl *Field, 1737 bool OutermostType = false, 1738 bool EncodingProperty = false, 1739 bool StructField = false) const; 1740 1741 // Adds the encoding of the structure's members. 1742 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1743 const FieldDecl *Field, 1744 bool includeVBases = true) const; 1745 1746 const ASTRecordLayout & 1747 getObjCLayout(const ObjCInterfaceDecl *D, 1748 const ObjCImplementationDecl *Impl) const; 1749 1750private: 1751 /// \brief A set of deallocations that should be performed when the 1752 /// ASTContext is destroyed. 1753 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1754 1755 // FIXME: This currently contains the set of StoredDeclMaps used 1756 // by DeclContext objects. This probably should not be in ASTContext, 1757 // but we include it here so that ASTContext can quickly deallocate them. 1758 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1759 1760 /// \brief A counter used to uniquely identify "blocks". 1761 mutable unsigned int UniqueBlockByRefTypeID; 1762 1763 friend class DeclContext; 1764 friend class DeclarationNameTable; 1765 void ReleaseDeclContextMaps(); 1766}; 1767 1768/// @brief Utility function for constructing a nullary selector. 1769static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 1770 IdentifierInfo* II = &Ctx.Idents.get(name); 1771 return Ctx.Selectors.getSelector(0, &II); 1772} 1773 1774/// @brief Utility function for constructing an unary selector. 1775static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 1776 IdentifierInfo* II = &Ctx.Idents.get(name); 1777 return Ctx.Selectors.getSelector(1, &II); 1778} 1779 1780} // end namespace clang 1781 1782// operator new and delete aren't allowed inside namespaces. 1783// The throw specifications are mandated by the standard. 1784/// @brief Placement new for using the ASTContext's allocator. 1785/// 1786/// This placement form of operator new uses the ASTContext's allocator for 1787/// obtaining memory. It is a non-throwing new, which means that it returns 1788/// null on error. (If that is what the allocator does. The current does, so if 1789/// this ever changes, this operator will have to be changed, too.) 1790/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1791/// @code 1792/// // Default alignment (8) 1793/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1794/// // Specific alignment 1795/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1796/// @endcode 1797/// Please note that you cannot use delete on the pointer; it must be 1798/// deallocated using an explicit destructor call followed by 1799/// @c Context.Deallocate(Ptr). 1800/// 1801/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1802/// @param C The ASTContext that provides the allocator. 1803/// @param Alignment The alignment of the allocated memory (if the underlying 1804/// allocator supports it). 1805/// @return The allocated memory. Could be NULL. 1806inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1807 size_t Alignment) throw () { 1808 return C.Allocate(Bytes, Alignment); 1809} 1810/// @brief Placement delete companion to the new above. 1811/// 1812/// This operator is just a companion to the new above. There is no way of 1813/// invoking it directly; see the new operator for more details. This operator 1814/// is called implicitly by the compiler if a placement new expression using 1815/// the ASTContext throws in the object constructor. 1816inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1817 throw () { 1818 C.Deallocate(Ptr); 1819} 1820 1821/// This placement form of operator new[] uses the ASTContext's allocator for 1822/// obtaining memory. It is a non-throwing new[], which means that it returns 1823/// null on error. 1824/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1825/// @code 1826/// // Default alignment (8) 1827/// char *data = new (Context) char[10]; 1828/// // Specific alignment 1829/// char *data = new (Context, 4) char[10]; 1830/// @endcode 1831/// Please note that you cannot use delete on the pointer; it must be 1832/// deallocated using an explicit destructor call followed by 1833/// @c Context.Deallocate(Ptr). 1834/// 1835/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1836/// @param C The ASTContext that provides the allocator. 1837/// @param Alignment The alignment of the allocated memory (if the underlying 1838/// allocator supports it). 1839/// @return The allocated memory. Could be NULL. 1840inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1841 size_t Alignment = 8) throw () { 1842 return C.Allocate(Bytes, Alignment); 1843} 1844 1845/// @brief Placement delete[] companion to the new[] above. 1846/// 1847/// This operator is just a companion to the new[] above. There is no way of 1848/// invoking it directly; see the new[] operator for more details. This operator 1849/// is called implicitly by the compiler if a placement new[] expression using 1850/// the ASTContext throws in the object constructor. 1851inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1852 throw () { 1853 C.Deallocate(Ptr); 1854} 1855 1856#endif 1857