ASTContext.h revision ab8bbf4ebd3e3e6eab913cb044772a62b7581941
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 CharUnits; 42 class Expr; 43 class ExternalASTSource; 44 class IdentifierTable; 45 class SelectorTable; 46 class SourceManager; 47 class TargetInfo; 48 // Decls 49 class CXXMethodDecl; 50 class CXXRecordDecl; 51 class Decl; 52 class FieldDecl; 53 class ObjCIvarDecl; 54 class ObjCIvarRefExpr; 55 class ObjCPropertyDecl; 56 class RecordDecl; 57 class TagDecl; 58 class TemplateTypeParmDecl; 59 class TranslationUnitDecl; 60 class TypeDecl; 61 class TypedefDecl; 62 class UsingDecl; 63 class UsingShadowDecl; 64 65 namespace Builtin { class Context; } 66 67/// ASTContext - This class holds long-lived AST nodes (such as types and 68/// decls) that can be referred to throughout the semantic analysis of a file. 69class ASTContext { 70 std::vector<Type*> Types; 71 llvm::FoldingSet<ExtQuals> ExtQualNodes; 72 llvm::FoldingSet<ComplexType> ComplexTypes; 73 llvm::FoldingSet<PointerType> PointerTypes; 74 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 75 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 76 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 77 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 78 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 79 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 80 std::vector<VariableArrayType*> VariableArrayTypes; 81 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 82 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 83 llvm::FoldingSet<VectorType> VectorTypes; 84 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 85 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 86 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 87 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 88 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 89 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 90 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 91 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 92 llvm::FoldingSet<TypenameType> TypenameTypes; 93 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 94 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 95 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 96 97 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 98 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 99 100 /// \brief The set of nested name specifiers. 101 /// 102 /// This set is managed by the NestedNameSpecifier class. 103 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 104 NestedNameSpecifier *GlobalNestedNameSpecifier; 105 friend class NestedNameSpecifier; 106 107 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 108 /// This is lazily created. This is intentionally not serialized. 109 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 110 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 111 112 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 113 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 114 115 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 116 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 117 118 /// BuiltinVaListType - built-in va list type. 119 /// This is initially null and set by Sema::LazilyCreateBuiltin when 120 /// a builtin that takes a valist is encountered. 121 QualType BuiltinVaListType; 122 123 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 124 QualType ObjCIdTypedefType; 125 126 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 127 QualType ObjCSelTypedefType; 128 129 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 130 QualType ObjCProtoType; 131 const RecordType *ProtoStructType; 132 133 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 134 QualType ObjCClassTypedefType; 135 136 QualType ObjCConstantStringType; 137 RecordDecl *CFConstantStringTypeDecl; 138 139 RecordDecl *ObjCFastEnumerationStateTypeDecl; 140 141 /// \brief The type for the C FILE type. 142 TypeDecl *FILEDecl; 143 144 /// \brief The type for the C jmp_buf type. 145 TypeDecl *jmp_bufDecl; 146 147 /// \brief The type for the C sigjmp_buf type. 148 TypeDecl *sigjmp_bufDecl; 149 150 /// \brief Type for the Block descriptor for Blocks CodeGen. 151 RecordDecl *BlockDescriptorType; 152 153 /// \brief Type for the Block descriptor for Blocks CodeGen. 154 RecordDecl *BlockDescriptorExtendedType; 155 156 /// \brief Keeps track of all declaration attributes. 157 /// 158 /// Since so few decls have attrs, we keep them in a hash map instead of 159 /// wasting space in the Decl class. 160 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 161 162 /// \brief Keeps track of the static data member templates from which 163 /// static data members of class template specializations were instantiated. 164 /// 165 /// This data structure stores the mapping from instantiations of static 166 /// data members to the static data member representations within the 167 /// class template from which they were instantiated along with the kind 168 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 169 /// 170 /// Given the following example: 171 /// 172 /// \code 173 /// template<typename T> 174 /// struct X { 175 /// static T value; 176 /// }; 177 /// 178 /// template<typename T> 179 /// T X<T>::value = T(17); 180 /// 181 /// int *x = &X<int>::value; 182 /// \endcode 183 /// 184 /// This mapping will contain an entry that maps from the VarDecl for 185 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 186 /// class template X) and will be marked TSK_ImplicitInstantiation. 187 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 188 InstantiatedFromStaticDataMember; 189 190 /// \brief Keeps track of the declaration from which a UsingDecl was 191 /// created during instantiation. The source declaration is always 192 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 193 /// UnresolvedUsingTypenameDecl. 194 /// 195 /// For example: 196 /// \code 197 /// template<typename T> 198 /// struct A { 199 /// void f(); 200 /// }; 201 /// 202 /// template<typename T> 203 /// struct B : A<T> { 204 /// using A<T>::f; 205 /// }; 206 /// 207 /// template struct B<int>; 208 /// \endcode 209 /// 210 /// This mapping will contain an entry that maps from the UsingDecl in 211 /// B<int> to the UnresolvedUsingDecl in B<T>. 212 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 213 214 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 215 InstantiatedFromUsingShadowDecl; 216 217 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 218 219 TranslationUnitDecl *TUDecl; 220 221 /// SourceMgr - The associated SourceManager object. 222 SourceManager &SourceMgr; 223 224 /// LangOpts - The language options used to create the AST associated with 225 /// this ASTContext object. 226 LangOptions LangOpts; 227 228 /// \brief Whether we have already loaded comment source ranges from an 229 /// external source. 230 bool LoadedExternalComments; 231 232 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 233 bool FreeMemory; 234 llvm::MallocAllocator MallocAlloc; 235 llvm::BumpPtrAllocator BumpAlloc; 236 237 /// \brief Mapping from declarations to their comments, once we have 238 /// already looked up the comment associated with a given declaration. 239 llvm::DenseMap<const Decl *, std::string> DeclComments; 240 241public: 242 const TargetInfo &Target; 243 IdentifierTable &Idents; 244 SelectorTable &Selectors; 245 Builtin::Context &BuiltinInfo; 246 DeclarationNameTable DeclarationNames; 247 llvm::OwningPtr<ExternalASTSource> ExternalSource; 248 clang::PrintingPolicy PrintingPolicy; 249 250 // Typedefs which may be provided defining the structure of Objective-C 251 // pseudo-builtins 252 QualType ObjCIdRedefinitionType; 253 QualType ObjCClassRedefinitionType; 254 QualType ObjCSelRedefinitionType; 255 256 /// \brief Source ranges for all of the comments in the source file, 257 /// sorted in order of appearance in the translation unit. 258 std::vector<SourceRange> Comments; 259 260 SourceManager& getSourceManager() { return SourceMgr; } 261 const SourceManager& getSourceManager() const { return SourceMgr; } 262 void *Allocate(unsigned Size, unsigned Align = 8) { 263 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 264 BumpAlloc.Allocate(Size, Align); 265 } 266 void Deallocate(void *Ptr) { 267 if (FreeMemory) 268 MallocAlloc.Deallocate(Ptr); 269 } 270 const LangOptions& getLangOptions() const { return LangOpts; } 271 272 FullSourceLoc getFullLoc(SourceLocation Loc) const { 273 return FullSourceLoc(Loc,SourceMgr); 274 } 275 276 /// \brief Retrieve the attributes for the given declaration. 277 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 278 279 /// \brief Erase the attributes corresponding to the given declaration. 280 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 281 282 /// \brief If this variable is an instantiated static data member of a 283 /// class template specialization, returns the templated static data member 284 /// from which it was instantiated. 285 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 286 const VarDecl *Var); 287 288 /// \brief Note that the static data member \p Inst is an instantiation of 289 /// the static data member template \p Tmpl of a class template. 290 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 291 TemplateSpecializationKind TSK); 292 293 /// \brief If the given using decl is an instantiation of a 294 /// (possibly unresolved) using decl from a template instantiation, 295 /// return it. 296 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 297 298 /// \brief Remember that the using decl \p Inst is an instantiation 299 /// of the using decl \p Pattern of a class template. 300 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 301 302 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 303 UsingShadowDecl *Pattern); 304 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 305 306 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 307 308 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 309 310 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 311 312 313 const char *getCommentForDecl(const Decl *D); 314 315 // Builtin Types. 316 CanQualType VoidTy; 317 CanQualType BoolTy; 318 CanQualType CharTy; 319 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 320 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 321 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 322 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 323 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 324 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 325 CanQualType FloatTy, DoubleTy, LongDoubleTy; 326 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 327 CanQualType VoidPtrTy, NullPtrTy; 328 CanQualType OverloadTy; 329 CanQualType DependentTy; 330 CanQualType UndeducedAutoTy; 331 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 332 333 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 334 IdentifierTable &idents, SelectorTable &sels, 335 Builtin::Context &builtins, 336 bool FreeMemory = true, unsigned size_reserve=0); 337 338 ~ASTContext(); 339 340 /// \brief Attach an external AST source to the AST context. 341 /// 342 /// The external AST source provides the ability to load parts of 343 /// the abstract syntax tree as needed from some external storage, 344 /// e.g., a precompiled header. 345 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 346 347 /// \brief Retrieve a pointer to the external AST source associated 348 /// with this AST context, if any. 349 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 350 351 void PrintStats() const; 352 const std::vector<Type*>& getTypes() const { return Types; } 353 354 //===--------------------------------------------------------------------===// 355 // Type Constructors 356 //===--------------------------------------------------------------------===// 357 358private: 359 /// getExtQualType - Return a type with extended qualifiers. 360 QualType getExtQualType(const Type *Base, Qualifiers Quals); 361 362public: 363 /// getAddSpaceQualType - Return the uniqued reference to the type for an 364 /// address space qualified type with the specified type and address space. 365 /// The resulting type has a union of the qualifiers from T and the address 366 /// space. If T already has an address space specifier, it is silently 367 /// replaced. 368 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 369 370 /// getObjCGCQualType - Returns the uniqued reference to the type for an 371 /// objc gc qualified type. The retulting type has a union of the qualifiers 372 /// from T and the gc attribute. 373 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 374 375 /// getRestrictType - Returns the uniqued reference to the type for a 376 /// 'restrict' qualified type. The resulting type has a union of the 377 /// qualifiers from T and 'restrict'. 378 QualType getRestrictType(QualType T) { 379 return T.withFastQualifiers(Qualifiers::Restrict); 380 } 381 382 /// getVolatileType - Returns the uniqued reference to the type for a 383 /// 'volatile' qualified type. The resulting type has a union of the 384 /// qualifiers from T and 'volatile'. 385 QualType getVolatileType(QualType T); 386 387 /// getConstType - Returns the uniqued reference to the type for a 388 /// 'const' qualified type. The resulting type has a union of the 389 /// qualifiers from T and 'const'. 390 /// 391 /// It can be reasonably expected that this will always be 392 /// equivalent to calling T.withConst(). 393 QualType getConstType(QualType T) { return T.withConst(); } 394 395 /// getNoReturnType - Add or remove the noreturn attribute to the given type 396 /// which must be a FunctionType or a pointer to an allowable type or a 397 /// BlockPointer. 398 QualType getNoReturnType(QualType T, bool AddNoReturn = true); 399 400 /// getCallConvType - Adds the specified calling convention attribute to 401 /// the given type, which must be a FunctionType or a pointer to an 402 /// allowable type. 403 QualType getCallConvType(QualType T, CallingConv CallConv); 404 405 /// getComplexType - Return the uniqued reference to the type for a complex 406 /// number with the specified element type. 407 QualType getComplexType(QualType T); 408 CanQualType getComplexType(CanQualType T) { 409 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 410 } 411 412 /// getPointerType - Return the uniqued reference to the type for a pointer to 413 /// the specified type. 414 QualType getPointerType(QualType T); 415 CanQualType getPointerType(CanQualType T) { 416 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 417 } 418 419 /// getBlockPointerType - Return the uniqued reference to the type for a block 420 /// of the specified type. 421 QualType getBlockPointerType(QualType T); 422 423 /// This gets the struct used to keep track of the descriptor for pointer to 424 /// blocks. 425 QualType getBlockDescriptorType(); 426 427 // Set the type for a Block descriptor type. 428 void setBlockDescriptorType(QualType T); 429 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 430 QualType getRawBlockdescriptorType() { 431 if (BlockDescriptorType) 432 return getTagDeclType(BlockDescriptorType); 433 return QualType(); 434 } 435 436 /// This gets the struct used to keep track of the extended descriptor for 437 /// pointer to blocks. 438 QualType getBlockDescriptorExtendedType(); 439 440 // Set the type for a Block descriptor extended type. 441 void setBlockDescriptorExtendedType(QualType T); 442 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 443 /// built. 444 QualType getRawBlockdescriptorExtendedType() { 445 if (BlockDescriptorExtendedType) 446 return getTagDeclType(BlockDescriptorExtendedType); 447 return QualType(); 448 } 449 450 /// This gets the struct used to keep track of pointer to blocks, complete 451 /// with captured variables. 452 QualType getBlockParmType(bool BlockHasCopyDispose, 453 llvm::SmallVector<const Expr *, 8> &BDRDs); 454 455 /// This builds the struct used for __block variables. 456 QualType BuildByRefType(const char *DeclName, QualType Ty); 457 458 /// Returns true iff we need copy/dispose helpers for the given type. 459 bool BlockRequiresCopying(QualType Ty); 460 461 /// getLValueReferenceType - Return the uniqued reference to the type for an 462 /// lvalue reference to the specified type. 463 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 464 465 /// getRValueReferenceType - Return the uniqued reference to the type for an 466 /// rvalue reference to the specified type. 467 QualType getRValueReferenceType(QualType T); 468 469 /// getMemberPointerType - Return the uniqued reference to the type for a 470 /// member pointer to the specified type in the specified class. The class 471 /// is a Type because it could be a dependent name. 472 QualType getMemberPointerType(QualType T, const Type *Cls); 473 474 /// getVariableArrayType - Returns a non-unique reference to the type for a 475 /// variable array of the specified element type. 476 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 477 ArrayType::ArraySizeModifier ASM, 478 unsigned EltTypeQuals, 479 SourceRange Brackets); 480 481 /// getDependentSizedArrayType - Returns a non-unique reference to 482 /// the type for a dependently-sized array of the specified element 483 /// type. FIXME: We will need these to be uniqued, or at least 484 /// comparable, at some point. 485 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 486 ArrayType::ArraySizeModifier ASM, 487 unsigned EltTypeQuals, 488 SourceRange Brackets); 489 490 /// getIncompleteArrayType - Returns a unique reference to the type for a 491 /// incomplete array of the specified element type. 492 QualType getIncompleteArrayType(QualType EltTy, 493 ArrayType::ArraySizeModifier ASM, 494 unsigned EltTypeQuals); 495 496 /// getConstantArrayType - Return the unique reference to the type for a 497 /// constant array of the specified element type. 498 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 499 ArrayType::ArraySizeModifier ASM, 500 unsigned EltTypeQuals); 501 502 /// getVectorType - Return the unique reference to a vector type of 503 /// the specified element type and size. VectorType must be a built-in type. 504 QualType getVectorType(QualType VectorType, unsigned NumElts); 505 506 /// getExtVectorType - Return the unique reference to an extended vector type 507 /// of the specified element type and size. VectorType must be a built-in 508 /// type. 509 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 510 511 /// getDependentSizedExtVectorType - Returns a non-unique reference to 512 /// the type for a dependently-sized vector of the specified element 513 /// type. FIXME: We will need these to be uniqued, or at least 514 /// comparable, at some point. 515 QualType getDependentSizedExtVectorType(QualType VectorType, 516 Expr *SizeExpr, 517 SourceLocation AttrLoc); 518 519 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 520 /// 521 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false, 522 CallingConv CallConv = CC_Default); 523 524 /// getFunctionType - Return a normal function type with a typed argument 525 /// list. isVariadic indicates whether the argument list includes '...'. 526 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 527 unsigned NumArgs, bool isVariadic, 528 unsigned TypeQuals, bool hasExceptionSpec = false, 529 bool hasAnyExceptionSpec = false, 530 unsigned NumExs = 0, const QualType *ExArray = 0, 531 bool NoReturn = false, 532 CallingConv CallConv = CC_Default); 533 534 /// getTypeDeclType - Return the unique reference to the type for 535 /// the specified type declaration. 536 QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0); 537 538 /// getTypedefType - Return the unique reference to the type for the 539 /// specified typename decl. 540 QualType getTypedefType(TypedefDecl *Decl); 541 542 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 543 QualType Replacement); 544 545 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 546 bool ParameterPack, 547 IdentifierInfo *Name = 0); 548 549 QualType getTemplateSpecializationType(TemplateName T, 550 const TemplateArgument *Args, 551 unsigned NumArgs, 552 QualType Canon = QualType()); 553 554 QualType getTemplateSpecializationType(TemplateName T, 555 const TemplateArgumentListInfo &Args, 556 QualType Canon = QualType()); 557 558 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 559 QualType NamedType); 560 QualType getTypenameType(NestedNameSpecifier *NNS, 561 const IdentifierInfo *Name, 562 QualType Canon = QualType()); 563 QualType getTypenameType(NestedNameSpecifier *NNS, 564 const TemplateSpecializationType *TemplateId, 565 QualType Canon = QualType()); 566 QualType getElaboratedType(QualType UnderlyingType, 567 ElaboratedType::TagKind Tag); 568 569 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 570 ObjCProtocolDecl **Protocols = 0, 571 unsigned NumProtocols = 0); 572 573 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 574 /// given interface decl and the conforming protocol list. 575 QualType getObjCObjectPointerType(QualType OIT, 576 ObjCProtocolDecl **ProtocolList = 0, 577 unsigned NumProtocols = 0); 578 579 /// getTypeOfType - GCC extension. 580 QualType getTypeOfExprType(Expr *e); 581 QualType getTypeOfType(QualType t); 582 583 /// getDecltypeType - C++0x decltype. 584 QualType getDecltypeType(Expr *e); 585 586 /// getTagDeclType - Return the unique reference to the type for the 587 /// specified TagDecl (struct/union/class/enum) decl. 588 QualType getTagDeclType(const TagDecl *Decl); 589 590 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 591 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 592 CanQualType getSizeType() const; 593 594 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 595 /// returns a type compatible with the type defined in <stddef.h> as defined 596 /// by the target. 597 QualType getWCharType() const { return WCharTy; } 598 599 /// getSignedWCharType - Return the type of "signed wchar_t". 600 /// Used when in C++, as a GCC extension. 601 QualType getSignedWCharType() const; 602 603 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 604 /// Used when in C++, as a GCC extension. 605 QualType getUnsignedWCharType() const; 606 607 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 608 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 609 QualType getPointerDiffType() const; 610 611 // getCFConstantStringType - Return the C structure type used to represent 612 // constant CFStrings. 613 QualType getCFConstantStringType(); 614 615 /// Get the structure type used to representation CFStrings, or NULL 616 /// if it hasn't yet been built. 617 QualType getRawCFConstantStringType() { 618 if (CFConstantStringTypeDecl) 619 return getTagDeclType(CFConstantStringTypeDecl); 620 return QualType(); 621 } 622 void setCFConstantStringType(QualType T); 623 624 // This setter/getter represents the ObjC type for an NSConstantString. 625 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 626 QualType getObjCConstantStringInterface() const { 627 return ObjCConstantStringType; 628 } 629 630 //// This gets the struct used to keep track of fast enumerations. 631 QualType getObjCFastEnumerationStateType(); 632 633 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 634 /// been built. 635 QualType getRawObjCFastEnumerationStateType() { 636 if (ObjCFastEnumerationStateTypeDecl) 637 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 638 return QualType(); 639 } 640 641 void setObjCFastEnumerationStateType(QualType T); 642 643 /// \brief Set the type for the C FILE type. 644 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 645 646 /// \brief Retrieve the C FILE type. 647 QualType getFILEType() { 648 if (FILEDecl) 649 return getTypeDeclType(FILEDecl); 650 return QualType(); 651 } 652 653 /// \brief Set the type for the C jmp_buf type. 654 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 655 this->jmp_bufDecl = jmp_bufDecl; 656 } 657 658 /// \brief Retrieve the C jmp_buf type. 659 QualType getjmp_bufType() { 660 if (jmp_bufDecl) 661 return getTypeDeclType(jmp_bufDecl); 662 return QualType(); 663 } 664 665 /// \brief Set the type for the C sigjmp_buf type. 666 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 667 this->sigjmp_bufDecl = sigjmp_bufDecl; 668 } 669 670 /// \brief Retrieve the C sigjmp_buf type. 671 QualType getsigjmp_bufType() { 672 if (sigjmp_bufDecl) 673 return getTypeDeclType(sigjmp_bufDecl); 674 return QualType(); 675 } 676 677 /// getObjCEncodingForType - Emit the ObjC type encoding for the 678 /// given type into \arg S. If \arg NameFields is specified then 679 /// record field names are also encoded. 680 void getObjCEncodingForType(QualType t, std::string &S, 681 const FieldDecl *Field=0); 682 683 void getLegacyIntegralTypeEncoding(QualType &t) const; 684 685 // Put the string version of type qualifiers into S. 686 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 687 std::string &S) const; 688 689 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 690 /// declaration. 691 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 692 693 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 694 /// declaration. 695 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 696 697 /// getObjCEncodingForPropertyDecl - Return the encoded type for 698 /// this method declaration. If non-NULL, Container must be either 699 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 700 /// only be NULL when getting encodings for protocol properties. 701 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 702 const Decl *Container, 703 std::string &S); 704 705 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 706 ObjCProtocolDecl *rProto); 707 708 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 709 /// purpose in characters. 710 CharUnits getObjCEncodingTypeSize(QualType t); 711 712 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 713 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 714 QualType getObjCIdType() const { return ObjCIdTypedefType; } 715 void setObjCIdType(QualType T); 716 717 void setObjCSelType(QualType T); 718 QualType getObjCSelType() const { return ObjCSelTypedefType; } 719 720 void setObjCProtoType(QualType QT); 721 QualType getObjCProtoType() const { return ObjCProtoType; } 722 723 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 724 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 725 /// struct. 726 QualType getObjCClassType() const { return ObjCClassTypedefType; } 727 void setObjCClassType(QualType T); 728 729 void setBuiltinVaListType(QualType T); 730 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 731 732 /// getCVRQualifiedType - Returns a type with additional const, 733 /// volatile, or restrict qualifiers. 734 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 735 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 736 } 737 738 /// getQualifiedType - Returns a type with additional qualifiers. 739 QualType getQualifiedType(QualType T, Qualifiers Qs) { 740 if (!Qs.hasNonFastQualifiers()) 741 return T.withFastQualifiers(Qs.getFastQualifiers()); 742 QualifierCollector Qc(Qs); 743 const Type *Ptr = Qc.strip(T); 744 return getExtQualType(Ptr, Qc); 745 } 746 747 /// getQualifiedType - Returns a type with additional qualifiers. 748 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 749 if (!Qs.hasNonFastQualifiers()) 750 return QualType(T, Qs.getFastQualifiers()); 751 return getExtQualType(T, Qs); 752 } 753 754 DeclarationName getNameForTemplate(TemplateName Name); 755 756 TemplateName getOverloadedTemplateName(NamedDecl * const *Begin, 757 NamedDecl * const *End); 758 759 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 760 bool TemplateKeyword, 761 TemplateDecl *Template); 762 763 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 764 const IdentifierInfo *Name); 765 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 766 OverloadedOperatorKind Operator); 767 768 enum GetBuiltinTypeError { 769 GE_None, //< No error 770 GE_Missing_stdio, //< Missing a type from <stdio.h> 771 GE_Missing_setjmp //< Missing a type from <setjmp.h> 772 }; 773 774 /// GetBuiltinType - Return the type for the specified builtin. 775 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 776 777private: 778 CanQualType getFromTargetType(unsigned Type) const; 779 780 //===--------------------------------------------------------------------===// 781 // Type Predicates. 782 //===--------------------------------------------------------------------===// 783 784public: 785 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 786 /// garbage collection attribute. 787 /// 788 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 789 790 /// isObjCNSObjectType - Return true if this is an NSObject object with 791 /// its NSObject attribute set. 792 bool isObjCNSObjectType(QualType Ty) const; 793 794 //===--------------------------------------------------------------------===// 795 // Type Sizing and Analysis 796 //===--------------------------------------------------------------------===// 797 798 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 799 /// scalar floating point type. 800 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 801 802 /// getTypeInfo - Get the size and alignment of the specified complete type in 803 /// bits. 804 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 805 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 806 return getTypeInfo(T.getTypePtr()); 807 } 808 809 /// getTypeSize - Return the size of the specified type, in bits. This method 810 /// does not work on incomplete types. 811 uint64_t getTypeSize(QualType T) { 812 return getTypeInfo(T).first; 813 } 814 uint64_t getTypeSize(const Type *T) { 815 return getTypeInfo(T).first; 816 } 817 818 /// getCharWidth - Return the size of the character type, in bits 819 uint64_t getCharWidth() { 820 return getTypeSize(CharTy); 821 } 822 823 /// getTypeSizeInChars - Return the size of the specified type, in characters. 824 /// This method does not work on incomplete types. 825 CharUnits getTypeSizeInChars(QualType T); 826 CharUnits getTypeSizeInChars(const Type *T); 827 828 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 829 /// This method does not work on incomplete types. 830 unsigned getTypeAlign(QualType T) { 831 return getTypeInfo(T).second; 832 } 833 unsigned getTypeAlign(const Type *T) { 834 return getTypeInfo(T).second; 835 } 836 837 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 838 /// type for the current target in bits. This can be different than the ABI 839 /// alignment in cases where it is beneficial for performance to overalign 840 /// a data type. 841 unsigned getPreferredTypeAlign(const Type *T); 842 843 unsigned getDeclAlignInBytes(const Decl *D, bool RefAsPointee = false); 844 845 /// getASTRecordLayout - Get or compute information about the layout of the 846 /// specified record (struct/union/class), which indicates its size and field 847 /// position information. 848 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 849 850 /// getASTObjCInterfaceLayout - Get or compute information about the 851 /// layout of the specified Objective-C interface. 852 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 853 854 /// getASTObjCImplementationLayout - Get or compute information about 855 /// the layout of the specified Objective-C implementation. This may 856 /// differ from the interface if synthesized ivars are present. 857 const ASTRecordLayout & 858 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 859 860 /// getKeyFunction - Get the key function for the given record decl. 861 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 862 /// 863 /// ...the first non-pure virtual function that is not inline at the point 864 /// of class definition. 865 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 866 867 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 868 llvm::SmallVectorImpl<FieldDecl*> &Fields); 869 870 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 871 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 872 bool CollectSynthesized = true); 873 void CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 874 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 875 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 876 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 877 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 878 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 879 void CollectInheritedProtocols(const Decl *CDecl, 880 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols); 881 882 //===--------------------------------------------------------------------===// 883 // Type Operators 884 //===--------------------------------------------------------------------===// 885 886 /// getCanonicalType - Return the canonical (structural) type corresponding to 887 /// the specified potentially non-canonical type. The non-canonical version 888 /// of a type may have many "decorated" versions of types. Decorators can 889 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 890 /// to be free of any of these, allowing two canonical types to be compared 891 /// for exact equality with a simple pointer comparison. 892 CanQualType getCanonicalType(QualType T); 893 const Type *getCanonicalType(const Type *T) { 894 return T->getCanonicalTypeInternal().getTypePtr(); 895 } 896 897 /// getCanonicalParamType - Return the canonical parameter type 898 /// corresponding to the specific potentially non-canonical one. 899 /// Qualifiers are stripped off, functions are turned into function 900 /// pointers, and arrays decay one level into pointers. 901 CanQualType getCanonicalParamType(QualType T); 902 903 /// \brief Determine whether the given types are equivalent. 904 bool hasSameType(QualType T1, QualType T2) { 905 return getCanonicalType(T1) == getCanonicalType(T2); 906 } 907 908 /// \brief Returns this type as a completely-unqualified array type, 909 /// capturing the qualifiers in Quals. This will remove the minimal amount of 910 /// sugaring from the types, similar to the behavior of 911 /// QualType::getUnqualifiedType(). 912 /// 913 /// \param T is the qualified type, which may be an ArrayType 914 /// 915 /// \param Quals will receive the full set of qualifiers that were 916 /// applied to the array. 917 /// 918 /// \returns if this is an array type, the completely unqualified array type 919 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 920 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 921 922 /// \brief Determine whether the given types are equivalent after 923 /// cvr-qualifiers have been removed. 924 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 925 CanQualType CT1 = getCanonicalType(T1); 926 CanQualType CT2 = getCanonicalType(T2); 927 928 Qualifiers Quals; 929 QualType UnqualT1 = getUnqualifiedArrayType(CT1, Quals); 930 QualType UnqualT2 = getUnqualifiedArrayType(CT2, Quals); 931 return UnqualT1 == UnqualT2; 932 } 933 934 /// \brief Retrieves the "canonical" declaration of 935 936 /// \brief Retrieves the "canonical" nested name specifier for a 937 /// given nested name specifier. 938 /// 939 /// The canonical nested name specifier is a nested name specifier 940 /// that uniquely identifies a type or namespace within the type 941 /// system. For example, given: 942 /// 943 /// \code 944 /// namespace N { 945 /// struct S { 946 /// template<typename T> struct X { typename T* type; }; 947 /// }; 948 /// } 949 /// 950 /// template<typename T> struct Y { 951 /// typename N::S::X<T>::type member; 952 /// }; 953 /// \endcode 954 /// 955 /// Here, the nested-name-specifier for N::S::X<T>:: will be 956 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 957 /// by declarations in the type system and the canonical type for 958 /// the template type parameter 'T' is template-param-0-0. 959 NestedNameSpecifier * 960 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 961 962 /// \brief Retrieves the "canonical" template name that refers to a 963 /// given template. 964 /// 965 /// The canonical template name is the simplest expression that can 966 /// be used to refer to a given template. For most templates, this 967 /// expression is just the template declaration itself. For example, 968 /// the template std::vector can be referred to via a variety of 969 /// names---std::vector, ::std::vector, vector (if vector is in 970 /// scope), etc.---but all of these names map down to the same 971 /// TemplateDecl, which is used to form the canonical template name. 972 /// 973 /// Dependent template names are more interesting. Here, the 974 /// template name could be something like T::template apply or 975 /// std::allocator<T>::template rebind, where the nested name 976 /// specifier itself is dependent. In this case, the canonical 977 /// template name uses the shortest form of the dependent 978 /// nested-name-specifier, which itself contains all canonical 979 /// types, values, and templates. 980 TemplateName getCanonicalTemplateName(TemplateName Name); 981 982 /// \brief Determine whether the given template names refer to the same 983 /// template. 984 bool hasSameTemplateName(TemplateName X, TemplateName Y); 985 986 /// \brief Retrieve the "canonical" template argument. 987 /// 988 /// The canonical template argument is the simplest template argument 989 /// (which may be a type, value, expression, or declaration) that 990 /// expresses the value of the argument. 991 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 992 993 /// Type Query functions. If the type is an instance of the specified class, 994 /// return the Type pointer for the underlying maximally pretty type. This 995 /// is a member of ASTContext because this may need to do some amount of 996 /// canonicalization, e.g. to move type qualifiers into the element type. 997 const ArrayType *getAsArrayType(QualType T); 998 const ConstantArrayType *getAsConstantArrayType(QualType T) { 999 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1000 } 1001 const VariableArrayType *getAsVariableArrayType(QualType T) { 1002 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1003 } 1004 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 1005 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1006 } 1007 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) { 1008 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1009 } 1010 1011 /// getBaseElementType - Returns the innermost element type of an array type. 1012 /// For example, will return "int" for int[m][n] 1013 QualType getBaseElementType(const ArrayType *VAT); 1014 1015 /// getBaseElementType - Returns the innermost element type of a type 1016 /// (which needn't actually be an array type). 1017 QualType getBaseElementType(QualType QT); 1018 1019 /// getConstantArrayElementCount - Returns number of constant array elements. 1020 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1021 1022 /// getArrayDecayedType - Return the properly qualified result of decaying the 1023 /// specified array type to a pointer. This operation is non-trivial when 1024 /// handling typedefs etc. The canonical type of "T" must be an array type, 1025 /// this returns a pointer to a properly qualified element of the array. 1026 /// 1027 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1028 QualType getArrayDecayedType(QualType T); 1029 1030 /// getPromotedIntegerType - Returns the type that Promotable will 1031 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1032 /// integer type. 1033 QualType getPromotedIntegerType(QualType PromotableType); 1034 1035 /// \brief Whether this is a promotable bitfield reference according 1036 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1037 /// 1038 /// \returns the type this bit-field will promote to, or NULL if no 1039 /// promotion occurs. 1040 QualType isPromotableBitField(Expr *E); 1041 1042 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1043 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1044 /// LHS < RHS, return -1. 1045 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1046 1047 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1048 /// point types, ignoring the domain of the type (i.e. 'double' == 1049 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1050 /// LHS < RHS, return -1. 1051 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1052 1053 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1054 /// point or a complex type (based on typeDomain/typeSize). 1055 /// 'typeDomain' is a real floating point or complex type. 1056 /// 'typeSize' is a real floating point or complex type. 1057 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1058 QualType typeDomain) const; 1059 1060private: 1061 // Helper for integer ordering 1062 unsigned getIntegerRank(Type* T); 1063 1064public: 1065 1066 //===--------------------------------------------------------------------===// 1067 // Type Compatibility Predicates 1068 //===--------------------------------------------------------------------===// 1069 1070 /// Compatibility predicates used to check assignment expressions. 1071 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1072 1073 bool isObjCIdType(QualType T) const { 1074 return T == ObjCIdTypedefType; 1075 } 1076 bool isObjCClassType(QualType T) const { 1077 return T == ObjCClassTypedefType; 1078 } 1079 bool isObjCSelType(QualType T) const { 1080 return T == ObjCSelTypedefType; 1081 } 1082 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1083 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1084 bool ForCompare); 1085 1086 // Check the safety of assignment from LHS to RHS 1087 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1088 const ObjCObjectPointerType *RHSOPT); 1089 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1090 const ObjCInterfaceType *RHS); 1091 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1092 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1093 const ObjCObjectPointerType *RHSOPT); 1094 1095 // Functions for calculating composite types 1096 QualType mergeTypes(QualType, QualType); 1097 QualType mergeFunctionTypes(QualType, QualType); 1098 1099 /// UsualArithmeticConversionsType - handles the various conversions 1100 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1101 /// and returns the result type of that conversion. 1102 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1103 1104 //===--------------------------------------------------------------------===// 1105 // Integer Predicates 1106 //===--------------------------------------------------------------------===// 1107 1108 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1109 // of bits in an integer type excluding any padding bits. 1110 unsigned getIntWidth(QualType T); 1111 1112 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1113 // unsigned integer type. This method takes a signed type, and returns the 1114 // corresponding unsigned integer type. 1115 QualType getCorrespondingUnsignedType(QualType T); 1116 1117 //===--------------------------------------------------------------------===// 1118 // Type Iterators. 1119 //===--------------------------------------------------------------------===// 1120 1121 typedef std::vector<Type*>::iterator type_iterator; 1122 typedef std::vector<Type*>::const_iterator const_type_iterator; 1123 1124 type_iterator types_begin() { return Types.begin(); } 1125 type_iterator types_end() { return Types.end(); } 1126 const_type_iterator types_begin() const { return Types.begin(); } 1127 const_type_iterator types_end() const { return Types.end(); } 1128 1129 //===--------------------------------------------------------------------===// 1130 // Integer Values 1131 //===--------------------------------------------------------------------===// 1132 1133 /// MakeIntValue - Make an APSInt of the appropriate width and 1134 /// signedness for the given \arg Value and integer \arg Type. 1135 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1136 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1137 Res = Value; 1138 return Res; 1139 } 1140 1141 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1142 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1143 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1144 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1145 1146 /// \brief Set the implementation of ObjCInterfaceDecl. 1147 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1148 ObjCImplementationDecl *ImplD); 1149 /// \brief Set the implementation of ObjCCategoryDecl. 1150 void setObjCImplementation(ObjCCategoryDecl *CatD, 1151 ObjCCategoryImplDecl *ImplD); 1152 1153 /// \brief Allocate an uninitialized TypeSourceInfo. 1154 /// 1155 /// The caller should initialize the memory held by TypeSourceInfo using 1156 /// the TypeLoc wrappers. 1157 /// 1158 /// \param T the type that will be the basis for type source info. This type 1159 /// should refer to how the declarator was written in source code, not to 1160 /// what type semantic analysis resolved the declarator to. 1161 /// 1162 /// \param Size the size of the type info to create, or 0 if the size 1163 /// should be calculated based on the type. 1164 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0); 1165 1166 /// \brief Allocate a TypeSourceInfo where all locations have been 1167 /// initialized to a given location, which defaults to the empty 1168 /// location. 1169 TypeSourceInfo * 1170 getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation()); 1171 1172private: 1173 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1174 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1175 1176 void InitBuiltinTypes(); 1177 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1178 1179 // Return the ObjC type encoding for a given type. 1180 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1181 bool ExpandPointedToStructures, 1182 bool ExpandStructures, 1183 const FieldDecl *Field, 1184 bool OutermostType = false, 1185 bool EncodingProperty = false); 1186 1187 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1188 const ObjCImplementationDecl *Impl); 1189}; 1190 1191/// @brief Utility function for constructing a nullary selector. 1192static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1193 IdentifierInfo* II = &Ctx.Idents.get(name); 1194 return Ctx.Selectors.getSelector(0, &II); 1195} 1196 1197/// @brief Utility function for constructing an unary selector. 1198static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1199 IdentifierInfo* II = &Ctx.Idents.get(name); 1200 return Ctx.Selectors.getSelector(1, &II); 1201} 1202 1203} // end namespace clang 1204 1205// operator new and delete aren't allowed inside namespaces. 1206// The throw specifications are mandated by the standard. 1207/// @brief Placement new for using the ASTContext's allocator. 1208/// 1209/// This placement form of operator new uses the ASTContext's allocator for 1210/// obtaining memory. It is a non-throwing new, which means that it returns 1211/// null on error. (If that is what the allocator does. The current does, so if 1212/// this ever changes, this operator will have to be changed, too.) 1213/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1214/// @code 1215/// // Default alignment (16) 1216/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1217/// // Specific alignment 1218/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1219/// @endcode 1220/// Please note that you cannot use delete on the pointer; it must be 1221/// deallocated using an explicit destructor call followed by 1222/// @c Context.Deallocate(Ptr). 1223/// 1224/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1225/// @param C The ASTContext that provides the allocator. 1226/// @param Alignment The alignment of the allocated memory (if the underlying 1227/// allocator supports it). 1228/// @return The allocated memory. Could be NULL. 1229inline void *operator new(size_t Bytes, clang::ASTContext &C, 1230 size_t Alignment) throw () { 1231 return C.Allocate(Bytes, Alignment); 1232} 1233/// @brief Placement delete companion to the new above. 1234/// 1235/// This operator is just a companion to the new above. There is no way of 1236/// invoking it directly; see the new operator for more details. This operator 1237/// is called implicitly by the compiler if a placement new expression using 1238/// the ASTContext throws in the object constructor. 1239inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1240 throw () { 1241 C.Deallocate(Ptr); 1242} 1243 1244/// This placement form of operator new[] uses the ASTContext's allocator for 1245/// obtaining memory. It is a non-throwing new[], which means that it returns 1246/// null on error. 1247/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1248/// @code 1249/// // Default alignment (16) 1250/// char *data = new (Context) char[10]; 1251/// // Specific alignment 1252/// char *data = new (Context, 8) char[10]; 1253/// @endcode 1254/// Please note that you cannot use delete on the pointer; it must be 1255/// deallocated using an explicit destructor call followed by 1256/// @c Context.Deallocate(Ptr). 1257/// 1258/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1259/// @param C The ASTContext that provides the allocator. 1260/// @param Alignment The alignment of the allocated memory (if the underlying 1261/// allocator supports it). 1262/// @return The allocated memory. Could be NULL. 1263inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1264 size_t Alignment = 16) throw () { 1265 return C.Allocate(Bytes, Alignment); 1266} 1267 1268/// @brief Placement delete[] companion to the new[] above. 1269/// 1270/// This operator is just a companion to the new[] above. There is no way of 1271/// invoking it directly; see the new[] operator for more details. This operator 1272/// is called implicitly by the compiler if a placement new[] expression using 1273/// the ASTContext throws in the object constructor. 1274inline void operator delete[](void *Ptr, clang::ASTContext &C, size_t) 1275 throw () { 1276 C.Deallocate(Ptr); 1277} 1278 1279#endif 1280