ASTContext.h revision ed97649e9574b9d854fa4d6109c9333ae0993554
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/IdentifierTable.h" 18#include "clang/Basic/LangOptions.h" 19#include "clang/Basic/OperatorKinds.h" 20#include "clang/AST/Attr.h" 21#include "clang/AST/Decl.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/PrettyPrinter.h" 24#include "clang/AST/TemplateName.h" 25#include "clang/AST/Type.h" 26#include "clang/AST/CanonicalType.h" 27#include "llvm/ADT/DenseMap.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/OwningPtr.h" 30#include "llvm/Support/Allocator.h" 31#include <vector> 32 33namespace llvm { 34 struct fltSemantics; 35} 36 37namespace clang { 38 class FileManager; 39 class ASTRecordLayout; 40 class BlockExpr; 41 class Expr; 42 class ExternalASTSource; 43 class IdentifierTable; 44 class SelectorTable; 45 class SourceManager; 46 class TargetInfo; 47 // Decls 48 class Decl; 49 class FieldDecl; 50 class ObjCIvarDecl; 51 class ObjCIvarRefExpr; 52 class ObjCPropertyDecl; 53 class RecordDecl; 54 class TagDecl; 55 class TemplateTypeParmDecl; 56 class TranslationUnitDecl; 57 class TypeDecl; 58 class TypedefDecl; 59 class UsingDecl; 60 class UsingShadowDecl; 61 62 namespace Builtin { class Context; } 63 64/// ASTContext - This class holds long-lived AST nodes (such as types and 65/// decls) that can be referred to throughout the semantic analysis of a file. 66class ASTContext { 67 std::vector<Type*> Types; 68 llvm::FoldingSet<ExtQuals> ExtQualNodes; 69 llvm::FoldingSet<ComplexType> ComplexTypes; 70 llvm::FoldingSet<PointerType> PointerTypes; 71 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 72 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 73 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 74 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 75 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 76 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 77 std::vector<VariableArrayType*> VariableArrayTypes; 78 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 79 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 80 llvm::FoldingSet<VectorType> VectorTypes; 81 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 82 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 83 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 84 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 85 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 86 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 87 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 88 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 89 llvm::FoldingSet<TypenameType> TypenameTypes; 90 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 91 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 92 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 93 94 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 95 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 96 97 /// \brief The set of nested name specifiers. 98 /// 99 /// This set is managed by the NestedNameSpecifier class. 100 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 101 NestedNameSpecifier *GlobalNestedNameSpecifier; 102 friend class NestedNameSpecifier; 103 104 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 105 /// This is lazily created. This is intentionally not serialized. 106 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 107 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 108 109 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 110 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 111 112 llvm::DenseMap<unsigned, FixedWidthIntType*> SignedFixedWidthIntTypes; 113 llvm::DenseMap<unsigned, FixedWidthIntType*> UnsignedFixedWidthIntTypes; 114 115 /// BuiltinVaListType - built-in va list type. 116 /// This is initially null and set by Sema::LazilyCreateBuiltin when 117 /// a builtin that takes a valist is encountered. 118 QualType BuiltinVaListType; 119 120 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 121 QualType ObjCIdTypedefType; 122 123 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 124 QualType ObjCSelTypedefType; 125 126 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 127 QualType ObjCProtoType; 128 const RecordType *ProtoStructType; 129 130 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 131 QualType ObjCClassTypedefType; 132 133 QualType ObjCConstantStringType; 134 RecordDecl *CFConstantStringTypeDecl; 135 136 RecordDecl *ObjCFastEnumerationStateTypeDecl; 137 138 /// \brief The type for the C FILE type. 139 TypeDecl *FILEDecl; 140 141 /// \brief The type for the C jmp_buf type. 142 TypeDecl *jmp_bufDecl; 143 144 /// \brief The type for the C sigjmp_buf type. 145 TypeDecl *sigjmp_bufDecl; 146 147 /// \brief Type for the Block descriptor for Blocks CodeGen. 148 RecordDecl *BlockDescriptorType; 149 150 /// \brief Type for the Block descriptor for Blocks CodeGen. 151 RecordDecl *BlockDescriptorExtendedType; 152 153 /// \brief Keeps track of all declaration attributes. 154 /// 155 /// Since so few decls have attrs, we keep them in a hash map instead of 156 /// wasting space in the Decl class. 157 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 158 159 /// \brief Keeps track of the static data member templates from which 160 /// static data members of class template specializations were instantiated. 161 /// 162 /// This data structure stores the mapping from instantiations of static 163 /// data members to the static data member representations within the 164 /// class template from which they were instantiated along with the kind 165 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 166 /// 167 /// Given the following example: 168 /// 169 /// \code 170 /// template<typename T> 171 /// struct X { 172 /// static T value; 173 /// }; 174 /// 175 /// template<typename T> 176 /// T X<T>::value = T(17); 177 /// 178 /// int *x = &X<int>::value; 179 /// \endcode 180 /// 181 /// This mapping will contain an entry that maps from the VarDecl for 182 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 183 /// class template X) and will be marked TSK_ImplicitInstantiation. 184 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 185 InstantiatedFromStaticDataMember; 186 187 /// \brief Keeps track of the declaration from which a UsingDecl was 188 /// created during instantiation. The source declaration is always 189 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 190 /// UnresolvedUsingTypenameDecl. 191 /// 192 /// For example: 193 /// \code 194 /// template<typename T> 195 /// struct A { 196 /// void f(); 197 /// }; 198 /// 199 /// template<typename T> 200 /// struct B : A<T> { 201 /// using A<T>::f; 202 /// }; 203 /// 204 /// template struct B<int>; 205 /// \endcode 206 /// 207 /// This mapping will contain an entry that maps from the UsingDecl in 208 /// B<int> to the UnresolvedUsingDecl in B<T>. 209 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 210 211 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 212 InstantiatedFromUsingShadowDecl; 213 214 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 215 216 TranslationUnitDecl *TUDecl; 217 218 /// SourceMgr - The associated SourceManager object. 219 SourceManager &SourceMgr; 220 221 /// LangOpts - The language options used to create the AST associated with 222 /// this ASTContext object. 223 LangOptions LangOpts; 224 225 /// \brief Whether we have already loaded comment source ranges from an 226 /// external source. 227 bool LoadedExternalComments; 228 229 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 230 bool FreeMemory; 231 llvm::MallocAllocator MallocAlloc; 232 llvm::BumpPtrAllocator BumpAlloc; 233 234 /// \brief Mapping from declarations to their comments, once we have 235 /// already looked up the comment associated with a given declaration. 236 llvm::DenseMap<const Decl *, std::string> DeclComments; 237 238public: 239 const TargetInfo &Target; 240 IdentifierTable &Idents; 241 SelectorTable &Selectors; 242 Builtin::Context &BuiltinInfo; 243 DeclarationNameTable DeclarationNames; 244 llvm::OwningPtr<ExternalASTSource> ExternalSource; 245 clang::PrintingPolicy PrintingPolicy; 246 247 // Typedefs which may be provided defining the structure of Objective-C 248 // pseudo-builtins 249 QualType ObjCIdRedefinitionType; 250 QualType ObjCClassRedefinitionType; 251 QualType ObjCSelRedefinitionType; 252 253 /// \brief Source ranges for all of the comments in the source file, 254 /// sorted in order of appearance in the translation unit. 255 std::vector<SourceRange> Comments; 256 257 SourceManager& getSourceManager() { return SourceMgr; } 258 const SourceManager& getSourceManager() const { return SourceMgr; } 259 void *Allocate(unsigned Size, unsigned Align = 8) { 260 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 261 BumpAlloc.Allocate(Size, Align); 262 } 263 void Deallocate(void *Ptr) { 264 if (FreeMemory) 265 MallocAlloc.Deallocate(Ptr); 266 } 267 const LangOptions& getLangOptions() const { return LangOpts; } 268 269 FullSourceLoc getFullLoc(SourceLocation Loc) const { 270 return FullSourceLoc(Loc,SourceMgr); 271 } 272 273 /// \brief Retrieve the attributes for the given declaration. 274 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 275 276 /// \brief Erase the attributes corresponding to the given declaration. 277 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 278 279 /// \brief If this variable is an instantiated static data member of a 280 /// class template specialization, returns the templated static data member 281 /// from which it was instantiated. 282 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 283 const VarDecl *Var); 284 285 /// \brief Note that the static data member \p Inst is an instantiation of 286 /// the static data member template \p Tmpl of a class template. 287 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 288 TemplateSpecializationKind TSK); 289 290 /// \brief If the given using decl is an instantiation of a 291 /// (possibly unresolved) using decl from a template instantiation, 292 /// return it. 293 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 294 295 /// \brief Remember that the using decl \p Inst is an instantiation 296 /// of the using decl \p Pattern of a class template. 297 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 298 299 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 300 UsingShadowDecl *Pattern); 301 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 302 303 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 304 305 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 306 307 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 308 309 310 const char *getCommentForDecl(const Decl *D); 311 312 // Builtin Types. 313 CanQualType VoidTy; 314 CanQualType BoolTy; 315 CanQualType CharTy; 316 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 317 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 318 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 319 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 320 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 321 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 322 CanQualType FloatTy, DoubleTy, LongDoubleTy; 323 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 324 CanQualType VoidPtrTy, NullPtrTy; 325 CanQualType OverloadTy; 326 CanQualType DependentTy; 327 CanQualType UndeducedAutoTy; 328 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 329 330 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 331 IdentifierTable &idents, SelectorTable &sels, 332 Builtin::Context &builtins, 333 bool FreeMemory = true, unsigned size_reserve=0); 334 335 ~ASTContext(); 336 337 /// \brief Attach an external AST source to the AST context. 338 /// 339 /// The external AST source provides the ability to load parts of 340 /// the abstract syntax tree as needed from some external storage, 341 /// e.g., a precompiled header. 342 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 343 344 /// \brief Retrieve a pointer to the external AST source associated 345 /// with this AST context, if any. 346 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 347 348 void PrintStats() const; 349 const std::vector<Type*>& getTypes() const { return Types; } 350 351 //===--------------------------------------------------------------------===// 352 // Type Constructors 353 //===--------------------------------------------------------------------===// 354 355private: 356 /// getExtQualType - Return a type with extended qualifiers. 357 QualType getExtQualType(const Type *Base, Qualifiers Quals); 358 359public: 360 /// getAddSpaceQualType - Return the uniqued reference to the type for an 361 /// address space qualified type with the specified type and address space. 362 /// The resulting type has a union of the qualifiers from T and the address 363 /// space. If T already has an address space specifier, it is silently 364 /// replaced. 365 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 366 367 /// getObjCGCQualType - Returns the uniqued reference to the type for an 368 /// objc gc qualified type. The retulting type has a union of the qualifiers 369 /// from T and the gc attribute. 370 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 371 372 /// getRestrictType - Returns the uniqued reference to the type for a 373 /// 'restrict' qualified type. The resulting type has a union of the 374 /// qualifiers from T and 'restrict'. 375 QualType getRestrictType(QualType T) { 376 return T.withFastQualifiers(Qualifiers::Restrict); 377 } 378 379 /// getVolatileType - Returns the uniqued reference to the type for a 380 /// 'volatile' qualified type. The resulting type has a union of the 381 /// qualifiers from T and 'volatile'. 382 QualType getVolatileType(QualType T); 383 384 /// getConstType - Returns the uniqued reference to the type for a 385 /// 'const' qualified type. The resulting type has a union of the 386 /// qualifiers from T and 'const'. 387 /// 388 /// It can be reasonably expected that this will always be 389 /// equivalent to calling T.withConst(). 390 QualType getConstType(QualType T) { return T.withConst(); } 391 392 /// getNoReturnType - Add the noreturn attribute to the given type which must 393 /// be a FunctionType or a pointer to an allowable type or a BlockPointer. 394 QualType getNoReturnType(QualType T); 395 396 /// getComplexType - Return the uniqued reference to the type for a complex 397 /// number with the specified element type. 398 QualType getComplexType(QualType T); 399 CanQualType getComplexType(CanQualType T) { 400 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 401 } 402 403 /// getPointerType - Return the uniqued reference to the type for a pointer to 404 /// the specified type. 405 QualType getPointerType(QualType T); 406 CanQualType getPointerType(CanQualType T) { 407 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 408 } 409 410 /// getBlockPointerType - Return the uniqued reference to the type for a block 411 /// of the specified type. 412 QualType getBlockPointerType(QualType T); 413 414 /// This gets the struct used to keep track of the descriptor for pointer to 415 /// blocks. 416 QualType getBlockDescriptorType(); 417 418 // Set the type for a Block descriptor type. 419 void setBlockDescriptorType(QualType T); 420 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 421 QualType getRawBlockdescriptorType() { 422 if (BlockDescriptorType) 423 return getTagDeclType(BlockDescriptorType); 424 return QualType(); 425 } 426 427 /// This gets the struct used to keep track of the extended descriptor for 428 /// pointer to blocks. 429 QualType getBlockDescriptorExtendedType(); 430 431 // Set the type for a Block descriptor extended type. 432 void setBlockDescriptorExtendedType(QualType T); 433 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 434 /// built. 435 QualType getRawBlockdescriptorExtendedType() { 436 if (BlockDescriptorExtendedType) 437 return getTagDeclType(BlockDescriptorExtendedType); 438 return QualType(); 439 } 440 441 /// This gets the struct used to keep track of pointer to blocks, complete 442 /// with captured variables. 443 QualType getBlockParmType(bool BlockHasCopyDispose, 444 llvm::SmallVector<const Expr *, 8> &BDRDs); 445 446 /// This builds the struct used for __block variables. 447 QualType BuildByRefType(const char *DeclName, QualType Ty); 448 449 /// Returns true iff we need copy/dispose helpers for the given type. 450 bool BlockRequiresCopying(QualType Ty); 451 452 /// getLValueReferenceType - Return the uniqued reference to the type for an 453 /// lvalue reference to the specified type. 454 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 455 456 /// getRValueReferenceType - Return the uniqued reference to the type for an 457 /// rvalue reference to the specified type. 458 QualType getRValueReferenceType(QualType T); 459 460 /// getMemberPointerType - Return the uniqued reference to the type for a 461 /// member pointer to the specified type in the specified class. The class 462 /// is a Type because it could be a dependent name. 463 QualType getMemberPointerType(QualType T, const Type *Cls); 464 465 /// getVariableArrayType - Returns a non-unique reference to the type for a 466 /// variable array of the specified element type. 467 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 468 ArrayType::ArraySizeModifier ASM, 469 unsigned EltTypeQuals, 470 SourceRange Brackets); 471 472 /// getDependentSizedArrayType - Returns a non-unique reference to 473 /// the type for a dependently-sized array of the specified element 474 /// type. FIXME: We will need these to be uniqued, or at least 475 /// comparable, at some point. 476 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 477 ArrayType::ArraySizeModifier ASM, 478 unsigned EltTypeQuals, 479 SourceRange Brackets); 480 481 /// getIncompleteArrayType - Returns a unique reference to the type for a 482 /// incomplete array of the specified element type. 483 QualType getIncompleteArrayType(QualType EltTy, 484 ArrayType::ArraySizeModifier ASM, 485 unsigned EltTypeQuals); 486 487 /// getConstantArrayType - Return the unique reference to the type for a 488 /// constant array of the specified element type. 489 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 490 ArrayType::ArraySizeModifier ASM, 491 unsigned EltTypeQuals); 492 493 /// getVectorType - Return the unique reference to a vector type of 494 /// the specified element type and size. VectorType must be a built-in type. 495 QualType getVectorType(QualType VectorType, unsigned NumElts); 496 497 /// getExtVectorType - Return the unique reference to an extended vector type 498 /// of the specified element type and size. VectorType must be a built-in 499 /// type. 500 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 501 502 /// getDependentSizedExtVectorType - Returns a non-unique reference to 503 /// the type for a dependently-sized vector of the specified element 504 /// type. FIXME: We will need these to be uniqued, or at least 505 /// comparable, at some point. 506 QualType getDependentSizedExtVectorType(QualType VectorType, 507 Expr *SizeExpr, 508 SourceLocation AttrLoc); 509 510 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 511 /// 512 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false); 513 514 /// getFunctionType - Return a normal function type with a typed argument 515 /// list. isVariadic indicates whether the argument list includes '...'. 516 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 517 unsigned NumArgs, bool isVariadic, 518 unsigned TypeQuals, bool hasExceptionSpec = false, 519 bool hasAnyExceptionSpec = false, 520 unsigned NumExs = 0, const QualType *ExArray = 0, 521 bool NoReturn = false); 522 523 /// getTypeDeclType - Return the unique reference to the type for 524 /// the specified type declaration. 525 QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0); 526 527 /// getTypedefType - Return the unique reference to the type for the 528 /// specified typename decl. 529 QualType getTypedefType(TypedefDecl *Decl); 530 531 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 532 QualType Replacement); 533 534 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 535 bool ParameterPack, 536 IdentifierInfo *Name = 0); 537 538 QualType getTemplateSpecializationType(TemplateName T, 539 const TemplateArgument *Args, 540 unsigned NumArgs, 541 QualType Canon = QualType()); 542 543 QualType getTemplateSpecializationType(TemplateName T, 544 const TemplateArgumentListInfo &Args, 545 QualType Canon = QualType()); 546 547 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 548 QualType NamedType); 549 QualType getTypenameType(NestedNameSpecifier *NNS, 550 const IdentifierInfo *Name, 551 QualType Canon = QualType()); 552 QualType getTypenameType(NestedNameSpecifier *NNS, 553 const TemplateSpecializationType *TemplateId, 554 QualType Canon = QualType()); 555 QualType getElaboratedType(QualType UnderlyingType, 556 ElaboratedType::TagKind Tag); 557 558 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 559 ObjCProtocolDecl **Protocols = 0, 560 unsigned NumProtocols = 0); 561 562 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 563 /// given interface decl and the conforming protocol list. 564 QualType getObjCObjectPointerType(QualType OIT, 565 ObjCProtocolDecl **ProtocolList = 0, 566 unsigned NumProtocols = 0); 567 568 /// getTypeOfType - GCC extension. 569 QualType getTypeOfExprType(Expr *e); 570 QualType getTypeOfType(QualType t); 571 572 /// getDecltypeType - C++0x decltype. 573 QualType getDecltypeType(Expr *e); 574 575 /// getTagDeclType - Return the unique reference to the type for the 576 /// specified TagDecl (struct/union/class/enum) decl. 577 QualType getTagDeclType(const TagDecl *Decl); 578 579 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 580 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 581 QualType getSizeType() const; 582 583 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 584 /// returns a type compatible with the type defined in <stddef.h> as defined 585 /// by the target. 586 QualType getWCharType() const { return WCharTy; } 587 588 /// getSignedWCharType - Return the type of "signed wchar_t". 589 /// Used when in C++, as a GCC extension. 590 QualType getSignedWCharType() const; 591 592 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 593 /// Used when in C++, as a GCC extension. 594 QualType getUnsignedWCharType() const; 595 596 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 597 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 598 QualType getPointerDiffType() const; 599 600 // getCFConstantStringType - Return the C structure type used to represent 601 // constant CFStrings. 602 QualType getCFConstantStringType(); 603 604 /// Get the structure type used to representation CFStrings, or NULL 605 /// if it hasn't yet been built. 606 QualType getRawCFConstantStringType() { 607 if (CFConstantStringTypeDecl) 608 return getTagDeclType(CFConstantStringTypeDecl); 609 return QualType(); 610 } 611 void setCFConstantStringType(QualType T); 612 613 // This setter/getter represents the ObjC type for an NSConstantString. 614 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 615 QualType getObjCConstantStringInterface() const { 616 return ObjCConstantStringType; 617 } 618 619 //// This gets the struct used to keep track of fast enumerations. 620 QualType getObjCFastEnumerationStateType(); 621 622 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 623 /// been built. 624 QualType getRawObjCFastEnumerationStateType() { 625 if (ObjCFastEnumerationStateTypeDecl) 626 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 627 return QualType(); 628 } 629 630 void setObjCFastEnumerationStateType(QualType T); 631 632 /// \brief Set the type for the C FILE type. 633 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 634 635 /// \brief Retrieve the C FILE type. 636 QualType getFILEType() { 637 if (FILEDecl) 638 return getTypeDeclType(FILEDecl); 639 return QualType(); 640 } 641 642 /// \brief Set the type for the C jmp_buf type. 643 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 644 this->jmp_bufDecl = jmp_bufDecl; 645 } 646 647 /// \brief Retrieve the C jmp_buf type. 648 QualType getjmp_bufType() { 649 if (jmp_bufDecl) 650 return getTypeDeclType(jmp_bufDecl); 651 return QualType(); 652 } 653 654 /// \brief Set the type for the C sigjmp_buf type. 655 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 656 this->sigjmp_bufDecl = sigjmp_bufDecl; 657 } 658 659 /// \brief Retrieve the C sigjmp_buf type. 660 QualType getsigjmp_bufType() { 661 if (sigjmp_bufDecl) 662 return getTypeDeclType(sigjmp_bufDecl); 663 return QualType(); 664 } 665 666 /// getObjCEncodingForType - Emit the ObjC type encoding for the 667 /// given type into \arg S. If \arg NameFields is specified then 668 /// record field names are also encoded. 669 void getObjCEncodingForType(QualType t, std::string &S, 670 const FieldDecl *Field=0); 671 672 void getLegacyIntegralTypeEncoding(QualType &t) const; 673 674 // Put the string version of type qualifiers into S. 675 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 676 std::string &S) const; 677 678 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 679 /// declaration. 680 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 681 682 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 683 /// declaration. 684 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 685 686 /// getObjCEncodingForPropertyDecl - Return the encoded type for 687 /// this method declaration. If non-NULL, Container must be either 688 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 689 /// only be NULL when getting encodings for protocol properties. 690 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 691 const Decl *Container, 692 std::string &S); 693 694 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 695 ObjCProtocolDecl *rProto); 696 697 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 698 /// purpose. 699 int getObjCEncodingTypeSize(QualType t); 700 701 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 702 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 703 QualType getObjCIdType() const { return ObjCIdTypedefType; } 704 void setObjCIdType(QualType T); 705 706 void setObjCSelType(QualType T); 707 QualType getObjCSelType() const { return ObjCSelTypedefType; } 708 709 void setObjCProtoType(QualType QT); 710 QualType getObjCProtoType() const { return ObjCProtoType; } 711 712 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 713 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 714 /// struct. 715 QualType getObjCClassType() const { return ObjCClassTypedefType; } 716 void setObjCClassType(QualType T); 717 718 void setBuiltinVaListType(QualType T); 719 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 720 721 QualType getFixedWidthIntType(unsigned Width, bool Signed); 722 723 /// getCVRQualifiedType - Returns a type with additional const, 724 /// volatile, or restrict qualifiers. 725 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 726 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 727 } 728 729 /// getQualifiedType - Returns a type with additional qualifiers. 730 QualType getQualifiedType(QualType T, Qualifiers Qs) { 731 if (!Qs.hasNonFastQualifiers()) 732 return T.withFastQualifiers(Qs.getFastQualifiers()); 733 QualifierCollector Qc(Qs); 734 const Type *Ptr = Qc.strip(T); 735 return getExtQualType(Ptr, Qc); 736 } 737 738 /// getQualifiedType - Returns a type with additional qualifiers. 739 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 740 if (!Qs.hasNonFastQualifiers()) 741 return QualType(T, Qs.getFastQualifiers()); 742 return getExtQualType(T, Qs); 743 } 744 745 DeclarationName getNameForTemplate(TemplateName Name); 746 747 TemplateName getOverloadedTemplateName(NamedDecl * const *Begin, 748 NamedDecl * const *End); 749 750 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 751 bool TemplateKeyword, 752 TemplateDecl *Template); 753 754 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 755 const IdentifierInfo *Name); 756 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 757 OverloadedOperatorKind Operator); 758 759 enum GetBuiltinTypeError { 760 GE_None, //< No error 761 GE_Missing_stdio, //< Missing a type from <stdio.h> 762 GE_Missing_setjmp //< Missing a type from <setjmp.h> 763 }; 764 765 /// GetBuiltinType - Return the type for the specified builtin. 766 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 767 768private: 769 CanQualType getFromTargetType(unsigned Type) const; 770 771 //===--------------------------------------------------------------------===// 772 // Type Predicates. 773 //===--------------------------------------------------------------------===// 774 775public: 776 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 777 /// garbage collection attribute. 778 /// 779 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 780 781 /// isObjCNSObjectType - Return true if this is an NSObject object with 782 /// its NSObject attribute set. 783 bool isObjCNSObjectType(QualType Ty) const; 784 785 //===--------------------------------------------------------------------===// 786 // Type Sizing and Analysis 787 //===--------------------------------------------------------------------===// 788 789 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 790 /// scalar floating point type. 791 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 792 793 /// getTypeInfo - Get the size and alignment of the specified complete type in 794 /// bits. 795 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 796 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 797 return getTypeInfo(T.getTypePtr()); 798 } 799 800 /// getTypeSize - Return the size of the specified type, in bits. This method 801 /// does not work on incomplete types. 802 uint64_t getTypeSize(QualType T) { 803 return getTypeInfo(T).first; 804 } 805 uint64_t getTypeSize(const Type *T) { 806 return getTypeInfo(T).first; 807 } 808 809 /// getByteWidth - Return the size of a byte, in bits 810 uint64_t getByteSize() { 811 return getTypeSize(CharTy); 812 } 813 814 /// getTypeSizeInBytes - Return the size of the specified type, in bytes. 815 /// This method does not work on incomplete types. 816 uint64_t getTypeSizeInBytes(QualType T) { 817 return getTypeSize(T) / getByteSize(); 818 } 819 uint64_t getTypeSizeInBytes(const Type *T) { 820 return getTypeSize(T) / getByteSize(); 821 } 822 823 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 824 /// This method does not work on incomplete types. 825 unsigned getTypeAlign(QualType T) { 826 return getTypeInfo(T).second; 827 } 828 unsigned getTypeAlign(const Type *T) { 829 return getTypeInfo(T).second; 830 } 831 832 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 833 /// type for the current target in bits. This can be different than the ABI 834 /// alignment in cases where it is beneficial for performance to overalign 835 /// a data type. 836 unsigned getPreferredTypeAlign(const Type *T); 837 838 unsigned getDeclAlignInBytes(const Decl *D, bool RefAsPointee = false); 839 840 /// getASTRecordLayout - Get or compute information about the layout of the 841 /// specified record (struct/union/class), which indicates its size and field 842 /// position information. 843 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 844 845 /// getASTObjCInterfaceLayout - Get or compute information about the 846 /// layout of the specified Objective-C interface. 847 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 848 849 /// getASTObjCImplementationLayout - Get or compute information about 850 /// the layout of the specified Objective-C implementation. This may 851 /// differ from the interface if synthesized ivars are present. 852 const ASTRecordLayout & 853 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 854 855 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 856 llvm::SmallVectorImpl<FieldDecl*> &Fields); 857 858 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 859 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 860 bool CollectSynthesized = true); 861 void CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 862 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 863 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 864 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 865 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 866 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 867 void CollectInheritedProtocols(const Decl *CDecl, 868 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols); 869 870 //===--------------------------------------------------------------------===// 871 // Type Operators 872 //===--------------------------------------------------------------------===// 873 874 /// getCanonicalType - Return the canonical (structural) type corresponding to 875 /// the specified potentially non-canonical type. The non-canonical version 876 /// of a type may have many "decorated" versions of types. Decorators can 877 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 878 /// to be free of any of these, allowing two canonical types to be compared 879 /// for exact equality with a simple pointer comparison. 880 CanQualType getCanonicalType(QualType T); 881 const Type *getCanonicalType(const Type *T) { 882 return T->getCanonicalTypeInternal().getTypePtr(); 883 } 884 885 /// getCanonicalParamType - Return the canonical parameter type 886 /// corresponding to the specific potentially non-canonical one. 887 /// Qualifiers are stripped off, functions are turned into function 888 /// pointers, and arrays decay one level into pointers. 889 CanQualType getCanonicalParamType(QualType T); 890 891 /// \brief Determine whether the given types are equivalent. 892 bool hasSameType(QualType T1, QualType T2) { 893 return getCanonicalType(T1) == getCanonicalType(T2); 894 } 895 896 /// \brief Determine whether the given types are equivalent after 897 /// cvr-qualifiers have been removed. 898 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 899 CanQualType CT1 = getCanonicalType(T1); 900 CanQualType CT2 = getCanonicalType(T2); 901 return CT1.getUnqualifiedType() == CT2.getUnqualifiedType(); 902 } 903 904 /// \brief Retrieves the "canonical" declaration of 905 906 /// \brief Retrieves the "canonical" nested name specifier for a 907 /// given nested name specifier. 908 /// 909 /// The canonical nested name specifier is a nested name specifier 910 /// that uniquely identifies a type or namespace within the type 911 /// system. For example, given: 912 /// 913 /// \code 914 /// namespace N { 915 /// struct S { 916 /// template<typename T> struct X { typename T* type; }; 917 /// }; 918 /// } 919 /// 920 /// template<typename T> struct Y { 921 /// typename N::S::X<T>::type member; 922 /// }; 923 /// \endcode 924 /// 925 /// Here, the nested-name-specifier for N::S::X<T>:: will be 926 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 927 /// by declarations in the type system and the canonical type for 928 /// the template type parameter 'T' is template-param-0-0. 929 NestedNameSpecifier * 930 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 931 932 /// \brief Retrieves the "canonical" template name that refers to a 933 /// given template. 934 /// 935 /// The canonical template name is the simplest expression that can 936 /// be used to refer to a given template. For most templates, this 937 /// expression is just the template declaration itself. For example, 938 /// the template std::vector can be referred to via a variety of 939 /// names---std::vector, ::std::vector, vector (if vector is in 940 /// scope), etc.---but all of these names map down to the same 941 /// TemplateDecl, which is used to form the canonical template name. 942 /// 943 /// Dependent template names are more interesting. Here, the 944 /// template name could be something like T::template apply or 945 /// std::allocator<T>::template rebind, where the nested name 946 /// specifier itself is dependent. In this case, the canonical 947 /// template name uses the shortest form of the dependent 948 /// nested-name-specifier, which itself contains all canonical 949 /// types, values, and templates. 950 TemplateName getCanonicalTemplateName(TemplateName Name); 951 952 /// \brief Determine whether the given template names refer to the same 953 /// template. 954 bool hasSameTemplateName(TemplateName X, TemplateName Y); 955 956 /// \brief Retrieve the "canonical" template argument. 957 /// 958 /// The canonical template argument is the simplest template argument 959 /// (which may be a type, value, expression, or declaration) that 960 /// expresses the value of the argument. 961 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 962 963 /// Type Query functions. If the type is an instance of the specified class, 964 /// return the Type pointer for the underlying maximally pretty type. This 965 /// is a member of ASTContext because this may need to do some amount of 966 /// canonicalization, e.g. to move type qualifiers into the element type. 967 const ArrayType *getAsArrayType(QualType T); 968 const ConstantArrayType *getAsConstantArrayType(QualType T) { 969 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 970 } 971 const VariableArrayType *getAsVariableArrayType(QualType T) { 972 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 973 } 974 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 975 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 976 } 977 978 /// getBaseElementType - Returns the innermost element type of an array type. 979 /// For example, will return "int" for int[m][n] 980 QualType getBaseElementType(const ArrayType *VAT); 981 982 /// getBaseElementType - Returns the innermost element type of a type 983 /// (which needn't actually be an array type). 984 QualType getBaseElementType(QualType QT); 985 986 /// getConstantArrayElementCount - Returns number of constant array elements. 987 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 988 989 /// getArrayDecayedType - Return the properly qualified result of decaying the 990 /// specified array type to a pointer. This operation is non-trivial when 991 /// handling typedefs etc. The canonical type of "T" must be an array type, 992 /// this returns a pointer to a properly qualified element of the array. 993 /// 994 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 995 QualType getArrayDecayedType(QualType T); 996 997 /// getPromotedIntegerType - Returns the type that Promotable will 998 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 999 /// integer type. 1000 QualType getPromotedIntegerType(QualType PromotableType); 1001 1002 /// \brief Whether this is a promotable bitfield reference according 1003 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1004 /// 1005 /// \returns the type this bit-field will promote to, or NULL if no 1006 /// promotion occurs. 1007 QualType isPromotableBitField(Expr *E); 1008 1009 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1010 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1011 /// LHS < RHS, return -1. 1012 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1013 1014 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1015 /// point types, ignoring the domain of the type (i.e. 'double' == 1016 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1017 /// LHS < RHS, return -1. 1018 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1019 1020 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1021 /// point or a complex type (based on typeDomain/typeSize). 1022 /// 'typeDomain' is a real floating point or complex type. 1023 /// 'typeSize' is a real floating point or complex type. 1024 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1025 QualType typeDomain) const; 1026 1027private: 1028 // Helper for integer ordering 1029 unsigned getIntegerRank(Type* T); 1030 1031public: 1032 1033 //===--------------------------------------------------------------------===// 1034 // Type Compatibility Predicates 1035 //===--------------------------------------------------------------------===// 1036 1037 /// Compatibility predicates used to check assignment expressions. 1038 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1039 1040 bool isObjCIdType(QualType T) const { 1041 return T == ObjCIdTypedefType; 1042 } 1043 bool isObjCClassType(QualType T) const { 1044 return T == ObjCClassTypedefType; 1045 } 1046 bool isObjCSelType(QualType T) const { 1047 return T == ObjCSelTypedefType; 1048 } 1049 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1050 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1051 bool ForCompare); 1052 1053 // Check the safety of assignment from LHS to RHS 1054 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1055 const ObjCObjectPointerType *RHSOPT); 1056 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1057 const ObjCInterfaceType *RHS); 1058 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1059 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1060 const ObjCObjectPointerType *RHSOPT); 1061 1062 // Functions for calculating composite types 1063 QualType mergeTypes(QualType, QualType); 1064 QualType mergeFunctionTypes(QualType, QualType); 1065 1066 /// UsualArithmeticConversionsType - handles the various conversions 1067 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1068 /// and returns the result type of that conversion. 1069 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1070 1071 //===--------------------------------------------------------------------===// 1072 // Integer Predicates 1073 //===--------------------------------------------------------------------===// 1074 1075 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1076 // of bits in an integer type excluding any padding bits. 1077 unsigned getIntWidth(QualType T); 1078 1079 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1080 // unsigned integer type. This method takes a signed type, and returns the 1081 // corresponding unsigned integer type. 1082 QualType getCorrespondingUnsignedType(QualType T); 1083 1084 //===--------------------------------------------------------------------===// 1085 // Type Iterators. 1086 //===--------------------------------------------------------------------===// 1087 1088 typedef std::vector<Type*>::iterator type_iterator; 1089 typedef std::vector<Type*>::const_iterator const_type_iterator; 1090 1091 type_iterator types_begin() { return Types.begin(); } 1092 type_iterator types_end() { return Types.end(); } 1093 const_type_iterator types_begin() const { return Types.begin(); } 1094 const_type_iterator types_end() const { return Types.end(); } 1095 1096 //===--------------------------------------------------------------------===// 1097 // Integer Values 1098 //===--------------------------------------------------------------------===// 1099 1100 /// MakeIntValue - Make an APSInt of the appropriate width and 1101 /// signedness for the given \arg Value and integer \arg Type. 1102 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1103 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1104 Res = Value; 1105 return Res; 1106 } 1107 1108 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1109 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1110 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1111 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1112 1113 /// \brief Set the implementation of ObjCInterfaceDecl. 1114 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1115 ObjCImplementationDecl *ImplD); 1116 /// \brief Set the implementation of ObjCCategoryDecl. 1117 void setObjCImplementation(ObjCCategoryDecl *CatD, 1118 ObjCCategoryImplDecl *ImplD); 1119 1120 /// \brief Allocate an uninitialized DeclaratorInfo. 1121 /// 1122 /// The caller should initialize the memory held by DeclaratorInfo using 1123 /// the TypeLoc wrappers. 1124 /// 1125 /// \param T the type that will be the basis for type source info. This type 1126 /// should refer to how the declarator was written in source code, not to 1127 /// what type semantic analysis resolved the declarator to. 1128 /// 1129 /// \param Size the size of the type info to create, or 0 if the size 1130 /// should be calculated based on the type. 1131 DeclaratorInfo *CreateDeclaratorInfo(QualType T, unsigned Size = 0); 1132 1133 /// \brief Allocate a DeclaratorInfo where all locations have been 1134 /// initialized to a given location, which defaults to the empty 1135 /// location. 1136 DeclaratorInfo * 1137 getTrivialDeclaratorInfo(QualType T, SourceLocation Loc = SourceLocation()); 1138 1139private: 1140 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1141 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1142 1143 void InitBuiltinTypes(); 1144 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1145 1146 // Return the ObjC type encoding for a given type. 1147 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1148 bool ExpandPointedToStructures, 1149 bool ExpandStructures, 1150 const FieldDecl *Field, 1151 bool OutermostType = false, 1152 bool EncodingProperty = false); 1153 1154 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1155 const ObjCImplementationDecl *Impl); 1156}; 1157 1158/// @brief Utility function for constructing a nullary selector. 1159static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1160 IdentifierInfo* II = &Ctx.Idents.get(name); 1161 return Ctx.Selectors.getSelector(0, &II); 1162} 1163 1164/// @brief Utility function for constructing an unary selector. 1165static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1166 IdentifierInfo* II = &Ctx.Idents.get(name); 1167 return Ctx.Selectors.getSelector(1, &II); 1168} 1169 1170} // end namespace clang 1171 1172// operator new and delete aren't allowed inside namespaces. 1173// The throw specifications are mandated by the standard. 1174/// @brief Placement new for using the ASTContext's allocator. 1175/// 1176/// This placement form of operator new uses the ASTContext's allocator for 1177/// obtaining memory. It is a non-throwing new, which means that it returns 1178/// null on error. (If that is what the allocator does. The current does, so if 1179/// this ever changes, this operator will have to be changed, too.) 1180/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1181/// @code 1182/// // Default alignment (16) 1183/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1184/// // Specific alignment 1185/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1186/// @endcode 1187/// Please note that you cannot use delete on the pointer; it must be 1188/// deallocated using an explicit destructor call followed by 1189/// @c Context.Deallocate(Ptr). 1190/// 1191/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1192/// @param C The ASTContext that provides the allocator. 1193/// @param Alignment The alignment of the allocated memory (if the underlying 1194/// allocator supports it). 1195/// @return The allocated memory. Could be NULL. 1196inline void *operator new(size_t Bytes, clang::ASTContext &C, 1197 size_t Alignment) throw () { 1198 return C.Allocate(Bytes, Alignment); 1199} 1200/// @brief Placement delete companion to the new above. 1201/// 1202/// This operator is just a companion to the new above. There is no way of 1203/// invoking it directly; see the new operator for more details. This operator 1204/// is called implicitly by the compiler if a placement new expression using 1205/// the ASTContext throws in the object constructor. 1206inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1207 throw () { 1208 C.Deallocate(Ptr); 1209} 1210 1211/// This placement form of operator new[] uses the ASTContext's allocator for 1212/// obtaining memory. It is a non-throwing new[], which means that it returns 1213/// null on error. 1214/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1215/// @code 1216/// // Default alignment (16) 1217/// char *data = new (Context) char[10]; 1218/// // Specific alignment 1219/// char *data = new (Context, 8) char[10]; 1220/// @endcode 1221/// Please note that you cannot use delete on the pointer; it must be 1222/// deallocated using an explicit destructor call followed by 1223/// @c Context.Deallocate(Ptr). 1224/// 1225/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1226/// @param C The ASTContext that provides the allocator. 1227/// @param Alignment The alignment of the allocated memory (if the underlying 1228/// allocator supports it). 1229/// @return The allocated memory. Could be NULL. 1230inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1231 size_t Alignment = 16) throw () { 1232 return C.Allocate(Bytes, Alignment); 1233} 1234 1235/// @brief Placement delete[] companion to the new[] above. 1236/// 1237/// This operator is just a companion to the new[] above. There is no way of 1238/// invoking it directly; see the new[] operator for more details. This operator 1239/// is called implicitly by the compiler if a placement new[] expression using 1240/// the ASTContext throws in the object constructor. 1241inline void operator delete[](void *Ptr, clang::ASTContext &C) throw () { 1242 C.Deallocate(Ptr); 1243} 1244 1245#endif 1246