ASTContext.h revision 0bd6feb9e9d40fc889fd47e899985125a43dfed8
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 61 namespace Builtin { class Context; } 62 63/// ASTContext - This class holds long-lived AST nodes (such as types and 64/// decls) that can be referred to throughout the semantic analysis of a file. 65class ASTContext { 66 std::vector<Type*> Types; 67 llvm::FoldingSet<ExtQuals> ExtQualNodes; 68 llvm::FoldingSet<ComplexType> ComplexTypes; 69 llvm::FoldingSet<PointerType> PointerTypes; 70 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 71 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 72 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 73 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 74 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 75 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 76 std::vector<VariableArrayType*> VariableArrayTypes; 77 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 78 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 79 llvm::FoldingSet<VectorType> VectorTypes; 80 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 81 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 82 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 83 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 84 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 85 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 86 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 87 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 88 llvm::FoldingSet<TypenameType> TypenameTypes; 89 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 90 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 91 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 92 93 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 94 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 95 96 /// \brief The set of nested name specifiers. 97 /// 98 /// This set is managed by the NestedNameSpecifier class. 99 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 100 NestedNameSpecifier *GlobalNestedNameSpecifier; 101 friend class NestedNameSpecifier; 102 103 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 104 /// This is lazily created. This is intentionally not serialized. 105 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 106 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 107 108 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 109 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 110 111 llvm::DenseMap<unsigned, FixedWidthIntType*> SignedFixedWidthIntTypes; 112 llvm::DenseMap<unsigned, FixedWidthIntType*> UnsignedFixedWidthIntTypes; 113 114 /// BuiltinVaListType - built-in va list type. 115 /// This is initially null and set by Sema::LazilyCreateBuiltin when 116 /// a builtin that takes a valist is encountered. 117 QualType BuiltinVaListType; 118 119 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 120 QualType ObjCIdTypedefType; 121 122 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 123 QualType ObjCSelTypedefType; 124 125 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 126 QualType ObjCProtoType; 127 const RecordType *ProtoStructType; 128 129 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 130 QualType ObjCClassTypedefType; 131 132 QualType ObjCConstantStringType; 133 RecordDecl *CFConstantStringTypeDecl; 134 135 RecordDecl *ObjCFastEnumerationStateTypeDecl; 136 137 /// \brief The type for the C FILE type. 138 TypeDecl *FILEDecl; 139 140 /// \brief The type for the C jmp_buf type. 141 TypeDecl *jmp_bufDecl; 142 143 /// \brief The type for the C sigjmp_buf type. 144 TypeDecl *sigjmp_bufDecl; 145 146 /// \brief Type for the Block descriptor for Blocks CodeGen. 147 RecordDecl *BlockDescriptorType; 148 149 /// \brief Type for the Block descriptor for Blocks CodeGen. 150 RecordDecl *BlockDescriptorExtendedType; 151 152 /// \brief Keeps track of all declaration attributes. 153 /// 154 /// Since so few decls have attrs, we keep them in a hash map instead of 155 /// wasting space in the Decl class. 156 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 157 158 /// \brief Keeps track of the static data member templates from which 159 /// static data members of class template specializations were instantiated. 160 /// 161 /// This data structure stores the mapping from instantiations of static 162 /// data members to the static data member representations within the 163 /// class template from which they were instantiated along with the kind 164 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 165 /// 166 /// Given the following example: 167 /// 168 /// \code 169 /// template<typename T> 170 /// struct X { 171 /// static T value; 172 /// }; 173 /// 174 /// template<typename T> 175 /// T X<T>::value = T(17); 176 /// 177 /// int *x = &X<int>::value; 178 /// \endcode 179 /// 180 /// This mapping will contain an entry that maps from the VarDecl for 181 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 182 /// class template X) and will be marked TSK_ImplicitInstantiation. 183 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 184 InstantiatedFromStaticDataMember; 185 186 /// \brief Keeps track of the UnresolvedUsingDecls from which UsingDecls 187 /// where created during instantiation. 188 /// 189 /// For example: 190 /// \code 191 /// template<typename T> 192 /// struct A { 193 /// void f(); 194 /// }; 195 /// 196 /// template<typename T> 197 /// struct B : A<T> { 198 /// using A<T>::f; 199 /// }; 200 /// 201 /// template struct B<int>; 202 /// \endcode 203 /// 204 /// This mapping will contain an entry that maps from the UsingDecl in 205 /// B<int> to the UnresolvedUsingDecl in B<T>. 206 llvm::DenseMap<UsingDecl *, NamedDecl *> 207 InstantiatedFromUnresolvedUsingDecl; 208 209 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 210 211 TranslationUnitDecl *TUDecl; 212 213 /// SourceMgr - The associated SourceManager object. 214 SourceManager &SourceMgr; 215 216 /// LangOpts - The language options used to create the AST associated with 217 /// this ASTContext object. 218 LangOptions LangOpts; 219 220 /// \brief Whether we have already loaded comment source ranges from an 221 /// external source. 222 bool LoadedExternalComments; 223 224 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 225 bool FreeMemory; 226 llvm::MallocAllocator MallocAlloc; 227 llvm::BumpPtrAllocator BumpAlloc; 228 229 /// \brief Mapping from declarations to their comments, once we have 230 /// already looked up the comment associated with a given declaration. 231 llvm::DenseMap<const Decl *, std::string> DeclComments; 232 233public: 234 const TargetInfo &Target; 235 IdentifierTable &Idents; 236 SelectorTable &Selectors; 237 Builtin::Context &BuiltinInfo; 238 DeclarationNameTable DeclarationNames; 239 llvm::OwningPtr<ExternalASTSource> ExternalSource; 240 clang::PrintingPolicy PrintingPolicy; 241 242 // Typedefs which may be provided defining the structure of Objective-C 243 // pseudo-builtins 244 QualType ObjCIdRedefinitionType; 245 QualType ObjCClassRedefinitionType; 246 QualType ObjCSelRedefinitionType; 247 248 /// \brief Source ranges for all of the comments in the source file, 249 /// sorted in order of appearance in the translation unit. 250 std::vector<SourceRange> Comments; 251 252 SourceManager& getSourceManager() { return SourceMgr; } 253 const SourceManager& getSourceManager() const { return SourceMgr; } 254 void *Allocate(unsigned Size, unsigned Align = 8) { 255 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 256 BumpAlloc.Allocate(Size, Align); 257 } 258 void Deallocate(void *Ptr) { 259 if (FreeMemory) 260 MallocAlloc.Deallocate(Ptr); 261 } 262 const LangOptions& getLangOptions() const { return LangOpts; } 263 264 FullSourceLoc getFullLoc(SourceLocation Loc) const { 265 return FullSourceLoc(Loc,SourceMgr); 266 } 267 268 /// \brief Retrieve the attributes for the given declaration. 269 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 270 271 /// \brief Erase the attributes corresponding to the given declaration. 272 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 273 274 /// \brief If this variable is an instantiated static data member of a 275 /// class template specialization, returns the templated static data member 276 /// from which it was instantiated. 277 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 278 const VarDecl *Var); 279 280 /// \brief Note that the static data member \p Inst is an instantiation of 281 /// the static data member template \p Tmpl of a class template. 282 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 283 TemplateSpecializationKind TSK); 284 285 /// \brief If this using decl is instantiated from an unresolved using decl, 286 /// return it. 287 NamedDecl *getInstantiatedFromUnresolvedUsingDecl(UsingDecl *UUD); 288 289 /// \brief Note that the using decl \p Inst is an instantiation of 290 /// the unresolved using decl \p Tmpl of a class template. 291 void setInstantiatedFromUnresolvedUsingDecl(UsingDecl *Inst, NamedDecl *Tmpl); 292 293 294 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 295 296 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 297 298 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 299 300 301 const char *getCommentForDecl(const Decl *D); 302 303 // Builtin Types. 304 CanQualType VoidTy; 305 CanQualType BoolTy; 306 CanQualType CharTy; 307 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 308 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 309 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 310 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 311 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 312 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 313 CanQualType FloatTy, DoubleTy, LongDoubleTy; 314 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 315 CanQualType VoidPtrTy, NullPtrTy; 316 CanQualType OverloadTy; 317 CanQualType DependentTy; 318 CanQualType UndeducedAutoTy; 319 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 320 321 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 322 IdentifierTable &idents, SelectorTable &sels, 323 Builtin::Context &builtins, 324 bool FreeMemory = true, unsigned size_reserve=0); 325 326 ~ASTContext(); 327 328 /// \brief Attach an external AST source to the AST context. 329 /// 330 /// The external AST source provides the ability to load parts of 331 /// the abstract syntax tree as needed from some external storage, 332 /// e.g., a precompiled header. 333 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 334 335 /// \brief Retrieve a pointer to the external AST source associated 336 /// with this AST context, if any. 337 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 338 339 void PrintStats() const; 340 const std::vector<Type*>& getTypes() const { return Types; } 341 342 //===--------------------------------------------------------------------===// 343 // Type Constructors 344 //===--------------------------------------------------------------------===// 345 346private: 347 /// getExtQualType - Return a type with extended qualifiers. 348 QualType getExtQualType(const Type *Base, Qualifiers Quals); 349 350public: 351 /// getAddSpaceQualType - Return the uniqued reference to the type for an 352 /// address space qualified type with the specified type and address space. 353 /// The resulting type has a union of the qualifiers from T and the address 354 /// space. If T already has an address space specifier, it is silently 355 /// replaced. 356 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 357 358 /// getObjCGCQualType - Returns the uniqued reference to the type for an 359 /// objc gc qualified type. The retulting type has a union of the qualifiers 360 /// from T and the gc attribute. 361 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 362 363 /// getRestrictType - Returns the uniqued reference to the type for a 364 /// 'restrict' qualified type. The resulting type has a union of the 365 /// qualifiers from T and 'restrict'. 366 QualType getRestrictType(QualType T) { 367 return T.withFastQualifiers(Qualifiers::Restrict); 368 } 369 370 /// getVolatileType - Returns the uniqued reference to the type for a 371 /// 'volatile' qualified type. The resulting type has a union of the 372 /// qualifiers from T and 'volatile'. 373 QualType getVolatileType(QualType T); 374 375 /// getConstType - Returns the uniqued reference to the type for a 376 /// 'const' qualified type. The resulting type has a union of the 377 /// qualifiers from T and 'const'. 378 /// 379 /// It can be reasonably expected that this will always be 380 /// equivalent to calling T.withConst(). 381 QualType getConstType(QualType T) { return T.withConst(); } 382 383 /// getNoReturnType - Add the noreturn attribute to the given type which must 384 /// be a FunctionType or a pointer to an allowable type or a BlockPointer. 385 QualType getNoReturnType(QualType T); 386 387 /// getComplexType - Return the uniqued reference to the type for a complex 388 /// number with the specified element type. 389 QualType getComplexType(QualType T); 390 CanQualType getComplexType(CanQualType T) { 391 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 392 } 393 394 /// getPointerType - Return the uniqued reference to the type for a pointer to 395 /// the specified type. 396 QualType getPointerType(QualType T); 397 CanQualType getPointerType(CanQualType T) { 398 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 399 } 400 401 /// getBlockPointerType - Return the uniqued reference to the type for a block 402 /// of the specified type. 403 QualType getBlockPointerType(QualType T); 404 405 /// This gets the struct used to keep track of the descriptor for pointer to 406 /// blocks. 407 QualType getBlockDescriptorType(); 408 409 // Set the type for a Block descriptor type. 410 void setBlockDescriptorType(QualType T); 411 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 412 QualType getRawBlockdescriptorType() { 413 if (BlockDescriptorType) 414 return getTagDeclType(BlockDescriptorType); 415 return QualType(); 416 } 417 418 /// This gets the struct used to keep track of the extended descriptor for 419 /// pointer to blocks. 420 QualType getBlockDescriptorExtendedType(); 421 422 // Set the type for a Block descriptor extended type. 423 void setBlockDescriptorExtendedType(QualType T); 424 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 425 /// built. 426 QualType getRawBlockdescriptorExtendedType() { 427 if (BlockDescriptorExtendedType) 428 return getTagDeclType(BlockDescriptorExtendedType); 429 return QualType(); 430 } 431 432 /// This gets the struct used to keep track of pointer to blocks, complete 433 /// with captured variables. 434 QualType getBlockParmType(bool BlockHasCopyDispose, 435 llvm::SmallVector<const Expr *, 8> &BDRDs); 436 437 /// This builds the struct used for __block variables. 438 QualType BuildByRefType(const char *DeclName, QualType Ty); 439 440 /// Returns true iff we need copy/dispose helpers for the given type. 441 bool BlockRequiresCopying(QualType Ty); 442 443 /// getLValueReferenceType - Return the uniqued reference to the type for an 444 /// lvalue reference to the specified type. 445 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 446 447 /// getRValueReferenceType - Return the uniqued reference to the type for an 448 /// rvalue reference to the specified type. 449 QualType getRValueReferenceType(QualType T); 450 451 /// getMemberPointerType - Return the uniqued reference to the type for a 452 /// member pointer to the specified type in the specified class. The class 453 /// is a Type because it could be a dependent name. 454 QualType getMemberPointerType(QualType T, const Type *Cls); 455 456 /// getVariableArrayType - Returns a non-unique reference to the type for a 457 /// variable array of the specified element type. 458 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 459 ArrayType::ArraySizeModifier ASM, 460 unsigned EltTypeQuals, 461 SourceRange Brackets); 462 463 /// getDependentSizedArrayType - Returns a non-unique reference to 464 /// the type for a dependently-sized array of the specified element 465 /// type. FIXME: We will need these to be uniqued, or at least 466 /// comparable, at some point. 467 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 468 ArrayType::ArraySizeModifier ASM, 469 unsigned EltTypeQuals, 470 SourceRange Brackets); 471 472 /// getIncompleteArrayType - Returns a unique reference to the type for a 473 /// incomplete array of the specified element type. 474 QualType getIncompleteArrayType(QualType EltTy, 475 ArrayType::ArraySizeModifier ASM, 476 unsigned EltTypeQuals); 477 478 /// getConstantArrayType - Return the unique reference to the type for a 479 /// constant array of the specified element type. 480 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 481 ArrayType::ArraySizeModifier ASM, 482 unsigned EltTypeQuals); 483 484 /// getVectorType - Return the unique reference to a vector type of 485 /// the specified element type and size. VectorType must be a built-in type. 486 QualType getVectorType(QualType VectorType, unsigned NumElts); 487 488 /// getExtVectorType - Return the unique reference to an extended vector type 489 /// of the specified element type and size. VectorType must be a built-in 490 /// type. 491 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 492 493 /// getDependentSizedExtVectorType - Returns a non-unique reference to 494 /// the type for a dependently-sized vector of the specified element 495 /// type. FIXME: We will need these to be uniqued, or at least 496 /// comparable, at some point. 497 QualType getDependentSizedExtVectorType(QualType VectorType, 498 Expr *SizeExpr, 499 SourceLocation AttrLoc); 500 501 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 502 /// 503 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false); 504 505 /// getFunctionType - Return a normal function type with a typed argument 506 /// list. isVariadic indicates whether the argument list includes '...'. 507 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 508 unsigned NumArgs, bool isVariadic, 509 unsigned TypeQuals, bool hasExceptionSpec = false, 510 bool hasAnyExceptionSpec = false, 511 unsigned NumExs = 0, const QualType *ExArray = 0, 512 bool NoReturn = false); 513 514 /// getTypeDeclType - Return the unique reference to the type for 515 /// the specified type declaration. 516 QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0); 517 518 /// getTypedefType - Return the unique reference to the type for the 519 /// specified typename decl. 520 QualType getTypedefType(TypedefDecl *Decl); 521 522 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 523 QualType Replacement); 524 525 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 526 bool ParameterPack, 527 IdentifierInfo *Name = 0); 528 529 QualType getTemplateSpecializationType(TemplateName T, 530 const TemplateArgument *Args, 531 unsigned NumArgs, 532 QualType Canon = QualType()); 533 534 QualType getTemplateSpecializationType(TemplateName T, 535 const TemplateArgumentListInfo &Args, 536 QualType Canon = QualType()); 537 538 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 539 QualType NamedType); 540 QualType getTypenameType(NestedNameSpecifier *NNS, 541 const IdentifierInfo *Name, 542 QualType Canon = QualType()); 543 QualType getTypenameType(NestedNameSpecifier *NNS, 544 const TemplateSpecializationType *TemplateId, 545 QualType Canon = QualType()); 546 QualType getElaboratedType(QualType UnderlyingType, 547 ElaboratedType::TagKind Tag); 548 549 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 550 ObjCProtocolDecl **Protocols = 0, 551 unsigned NumProtocols = 0); 552 553 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 554 /// given interface decl and the conforming protocol list. 555 QualType getObjCObjectPointerType(QualType OIT, 556 ObjCProtocolDecl **ProtocolList = 0, 557 unsigned NumProtocols = 0); 558 559 /// getTypeOfType - GCC extension. 560 QualType getTypeOfExprType(Expr *e); 561 QualType getTypeOfType(QualType t); 562 563 /// getDecltypeType - C++0x decltype. 564 QualType getDecltypeType(Expr *e); 565 566 /// getTagDeclType - Return the unique reference to the type for the 567 /// specified TagDecl (struct/union/class/enum) decl. 568 QualType getTagDeclType(const TagDecl *Decl); 569 570 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 571 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 572 QualType getSizeType() const; 573 574 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 575 /// returns a type compatible with the type defined in <stddef.h> as defined 576 /// by the target. 577 QualType getWCharType() const { return WCharTy; } 578 579 /// getSignedWCharType - Return the type of "signed wchar_t". 580 /// Used when in C++, as a GCC extension. 581 QualType getSignedWCharType() const; 582 583 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 584 /// Used when in C++, as a GCC extension. 585 QualType getUnsignedWCharType() const; 586 587 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 588 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 589 QualType getPointerDiffType() const; 590 591 // getCFConstantStringType - Return the C structure type used to represent 592 // constant CFStrings. 593 QualType getCFConstantStringType(); 594 595 /// Get the structure type used to representation CFStrings, or NULL 596 /// if it hasn't yet been built. 597 QualType getRawCFConstantStringType() { 598 if (CFConstantStringTypeDecl) 599 return getTagDeclType(CFConstantStringTypeDecl); 600 return QualType(); 601 } 602 void setCFConstantStringType(QualType T); 603 604 // This setter/getter represents the ObjC type for an NSConstantString. 605 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 606 QualType getObjCConstantStringInterface() const { 607 return ObjCConstantStringType; 608 } 609 610 //// This gets the struct used to keep track of fast enumerations. 611 QualType getObjCFastEnumerationStateType(); 612 613 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 614 /// been built. 615 QualType getRawObjCFastEnumerationStateType() { 616 if (ObjCFastEnumerationStateTypeDecl) 617 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 618 return QualType(); 619 } 620 621 void setObjCFastEnumerationStateType(QualType T); 622 623 /// \brief Set the type for the C FILE type. 624 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 625 626 /// \brief Retrieve the C FILE type. 627 QualType getFILEType() { 628 if (FILEDecl) 629 return getTypeDeclType(FILEDecl); 630 return QualType(); 631 } 632 633 /// \brief Set the type for the C jmp_buf type. 634 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 635 this->jmp_bufDecl = jmp_bufDecl; 636 } 637 638 /// \brief Retrieve the C jmp_buf type. 639 QualType getjmp_bufType() { 640 if (jmp_bufDecl) 641 return getTypeDeclType(jmp_bufDecl); 642 return QualType(); 643 } 644 645 /// \brief Set the type for the C sigjmp_buf type. 646 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 647 this->sigjmp_bufDecl = sigjmp_bufDecl; 648 } 649 650 /// \brief Retrieve the C sigjmp_buf type. 651 QualType getsigjmp_bufType() { 652 if (sigjmp_bufDecl) 653 return getTypeDeclType(sigjmp_bufDecl); 654 return QualType(); 655 } 656 657 /// getObjCEncodingForType - Emit the ObjC type encoding for the 658 /// given type into \arg S. If \arg NameFields is specified then 659 /// record field names are also encoded. 660 void getObjCEncodingForType(QualType t, std::string &S, 661 const FieldDecl *Field=0); 662 663 void getLegacyIntegralTypeEncoding(QualType &t) const; 664 665 // Put the string version of type qualifiers into S. 666 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 667 std::string &S) const; 668 669 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 670 /// declaration. 671 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 672 673 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 674 /// declaration. 675 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 676 677 /// getObjCEncodingForPropertyDecl - Return the encoded type for 678 /// this method declaration. If non-NULL, Container must be either 679 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 680 /// only be NULL when getting encodings for protocol properties. 681 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 682 const Decl *Container, 683 std::string &S); 684 685 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 686 ObjCProtocolDecl *rProto); 687 688 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 689 /// purpose. 690 int getObjCEncodingTypeSize(QualType t); 691 692 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 693 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 694 QualType getObjCIdType() const { return ObjCIdTypedefType; } 695 void setObjCIdType(QualType T); 696 697 void setObjCSelType(QualType T); 698 QualType getObjCSelType() const { return ObjCSelTypedefType; } 699 700 void setObjCProtoType(QualType QT); 701 QualType getObjCProtoType() const { return ObjCProtoType; } 702 703 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 704 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 705 /// struct. 706 QualType getObjCClassType() const { return ObjCClassTypedefType; } 707 void setObjCClassType(QualType T); 708 709 void setBuiltinVaListType(QualType T); 710 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 711 712 QualType getFixedWidthIntType(unsigned Width, bool Signed); 713 714 /// getCVRQualifiedType - Returns a type with additional const, 715 /// volatile, or restrict qualifiers. 716 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 717 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 718 } 719 720 /// getQualifiedType - Returns a type with additional qualifiers. 721 QualType getQualifiedType(QualType T, Qualifiers Qs) { 722 if (!Qs.hasNonFastQualifiers()) 723 return T.withFastQualifiers(Qs.getFastQualifiers()); 724 QualifierCollector Qc(Qs); 725 const Type *Ptr = Qc.strip(T); 726 return getExtQualType(Ptr, Qc); 727 } 728 729 /// getQualifiedType - Returns a type with additional qualifiers. 730 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 731 if (!Qs.hasNonFastQualifiers()) 732 return QualType(T, Qs.getFastQualifiers()); 733 return getExtQualType(T, Qs); 734 } 735 736 DeclarationName getNameForTemplate(TemplateName Name); 737 738 TemplateName getOverloadedTemplateName(NamedDecl * const *Begin, 739 NamedDecl * const *End); 740 741 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 742 bool TemplateKeyword, 743 TemplateDecl *Template); 744 745 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 746 const IdentifierInfo *Name); 747 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 748 OverloadedOperatorKind Operator); 749 750 enum GetBuiltinTypeError { 751 GE_None, //< No error 752 GE_Missing_stdio, //< Missing a type from <stdio.h> 753 GE_Missing_setjmp //< Missing a type from <setjmp.h> 754 }; 755 756 /// GetBuiltinType - Return the type for the specified builtin. 757 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 758 759private: 760 CanQualType getFromTargetType(unsigned Type) const; 761 762 //===--------------------------------------------------------------------===// 763 // Type Predicates. 764 //===--------------------------------------------------------------------===// 765 766public: 767 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 768 /// garbage collection attribute. 769 /// 770 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 771 772 /// isObjCNSObjectType - Return true if this is an NSObject object with 773 /// its NSObject attribute set. 774 bool isObjCNSObjectType(QualType Ty) const; 775 776 //===--------------------------------------------------------------------===// 777 // Type Sizing and Analysis 778 //===--------------------------------------------------------------------===// 779 780 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 781 /// scalar floating point type. 782 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 783 784 /// getTypeInfo - Get the size and alignment of the specified complete type in 785 /// bits. 786 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 787 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 788 return getTypeInfo(T.getTypePtr()); 789 } 790 791 /// getTypeSize - Return the size of the specified type, in bits. This method 792 /// does not work on incomplete types. 793 uint64_t getTypeSize(QualType T) { 794 return getTypeInfo(T).first; 795 } 796 uint64_t getTypeSize(const Type *T) { 797 return getTypeInfo(T).first; 798 } 799 800 /// getByteWidth - Return the size of a byte, in bits 801 uint64_t getByteSize() { 802 return getTypeSize(CharTy); 803 } 804 805 /// getTypeSizeInBytes - Return the size of the specified type, in bytes. 806 /// This method does not work on incomplete types. 807 uint64_t getTypeSizeInBytes(QualType T) { 808 return getTypeSize(T) / getByteSize(); 809 } 810 uint64_t getTypeSizeInBytes(const Type *T) { 811 return getTypeSize(T) / getByteSize(); 812 } 813 814 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 815 /// This method does not work on incomplete types. 816 unsigned getTypeAlign(QualType T) { 817 return getTypeInfo(T).second; 818 } 819 unsigned getTypeAlign(const Type *T) { 820 return getTypeInfo(T).second; 821 } 822 823 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 824 /// type for the current target in bits. This can be different than the ABI 825 /// alignment in cases where it is beneficial for performance to overalign 826 /// a data type. 827 unsigned getPreferredTypeAlign(const Type *T); 828 829 unsigned getDeclAlignInBytes(const Decl *D, bool RefAsPointee = false); 830 831 /// getASTRecordLayout - Get or compute information about the layout of the 832 /// specified record (struct/union/class), which indicates its size and field 833 /// position information. 834 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 835 836 /// getASTObjCInterfaceLayout - Get or compute information about the 837 /// layout of the specified Objective-C interface. 838 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 839 840 /// getASTObjCImplementationLayout - Get or compute information about 841 /// the layout of the specified Objective-C implementation. This may 842 /// differ from the interface if synthesized ivars are present. 843 const ASTRecordLayout & 844 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 845 846 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 847 llvm::SmallVectorImpl<FieldDecl*> &Fields); 848 849 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 850 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 851 bool CollectSynthesized = true); 852 void CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 853 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 854 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 855 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 856 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 857 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 858 void CollectInheritedProtocols(const Decl *CDecl, 859 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols); 860 861 //===--------------------------------------------------------------------===// 862 // Type Operators 863 //===--------------------------------------------------------------------===// 864 865 /// getCanonicalType - Return the canonical (structural) type corresponding to 866 /// the specified potentially non-canonical type. The non-canonical version 867 /// of a type may have many "decorated" versions of types. Decorators can 868 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 869 /// to be free of any of these, allowing two canonical types to be compared 870 /// for exact equality with a simple pointer comparison. 871 CanQualType getCanonicalType(QualType T); 872 const Type *getCanonicalType(const Type *T) { 873 return T->getCanonicalTypeInternal().getTypePtr(); 874 } 875 876 /// getCanonicalParamType - Return the canonical parameter type 877 /// corresponding to the specific potentially non-canonical one. 878 /// Qualifiers are stripped off, functions are turned into function 879 /// pointers, and arrays decay one level into pointers. 880 CanQualType getCanonicalParamType(QualType T); 881 882 /// \brief Determine whether the given types are equivalent. 883 bool hasSameType(QualType T1, QualType T2) { 884 return getCanonicalType(T1) == getCanonicalType(T2); 885 } 886 887 /// \brief Determine whether the given types are equivalent after 888 /// cvr-qualifiers have been removed. 889 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 890 CanQualType CT1 = getCanonicalType(T1); 891 CanQualType CT2 = getCanonicalType(T2); 892 return CT1.getUnqualifiedType() == CT2.getUnqualifiedType(); 893 } 894 895 /// \brief Retrieves the "canonical" declaration of 896 897 /// \brief Retrieves the "canonical" nested name specifier for a 898 /// given nested name specifier. 899 /// 900 /// The canonical nested name specifier is a nested name specifier 901 /// that uniquely identifies a type or namespace within the type 902 /// system. For example, given: 903 /// 904 /// \code 905 /// namespace N { 906 /// struct S { 907 /// template<typename T> struct X { typename T* type; }; 908 /// }; 909 /// } 910 /// 911 /// template<typename T> struct Y { 912 /// typename N::S::X<T>::type member; 913 /// }; 914 /// \endcode 915 /// 916 /// Here, the nested-name-specifier for N::S::X<T>:: will be 917 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 918 /// by declarations in the type system and the canonical type for 919 /// the template type parameter 'T' is template-param-0-0. 920 NestedNameSpecifier * 921 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 922 923 /// \brief Retrieves the "canonical" template name that refers to a 924 /// given template. 925 /// 926 /// The canonical template name is the simplest expression that can 927 /// be used to refer to a given template. For most templates, this 928 /// expression is just the template declaration itself. For example, 929 /// the template std::vector can be referred to via a variety of 930 /// names---std::vector, ::std::vector, vector (if vector is in 931 /// scope), etc.---but all of these names map down to the same 932 /// TemplateDecl, which is used to form the canonical template name. 933 /// 934 /// Dependent template names are more interesting. Here, the 935 /// template name could be something like T::template apply or 936 /// std::allocator<T>::template rebind, where the nested name 937 /// specifier itself is dependent. In this case, the canonical 938 /// template name uses the shortest form of the dependent 939 /// nested-name-specifier, which itself contains all canonical 940 /// types, values, and templates. 941 TemplateName getCanonicalTemplateName(TemplateName Name); 942 943 /// \brief Determine whether the given template names refer to the same 944 /// template. 945 bool hasSameTemplateName(TemplateName X, TemplateName Y); 946 947 /// \brief Retrieve the "canonical" template argument. 948 /// 949 /// The canonical template argument is the simplest template argument 950 /// (which may be a type, value, expression, or declaration) that 951 /// expresses the value of the argument. 952 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 953 954 /// Type Query functions. If the type is an instance of the specified class, 955 /// return the Type pointer for the underlying maximally pretty type. This 956 /// is a member of ASTContext because this may need to do some amount of 957 /// canonicalization, e.g. to move type qualifiers into the element type. 958 const ArrayType *getAsArrayType(QualType T); 959 const ConstantArrayType *getAsConstantArrayType(QualType T) { 960 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 961 } 962 const VariableArrayType *getAsVariableArrayType(QualType T) { 963 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 964 } 965 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 966 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 967 } 968 969 /// getBaseElementType - Returns the innermost element type of an array type. 970 /// For example, will return "int" for int[m][n] 971 QualType getBaseElementType(const ArrayType *VAT); 972 973 /// getBaseElementType - Returns the innermost element type of a type 974 /// (which needn't actually be an array type). 975 QualType getBaseElementType(QualType QT); 976 977 /// getConstantArrayElementCount - Returns number of constant array elements. 978 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 979 980 /// getArrayDecayedType - Return the properly qualified result of decaying the 981 /// specified array type to a pointer. This operation is non-trivial when 982 /// handling typedefs etc. The canonical type of "T" must be an array type, 983 /// this returns a pointer to a properly qualified element of the array. 984 /// 985 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 986 QualType getArrayDecayedType(QualType T); 987 988 /// getPromotedIntegerType - Returns the type that Promotable will 989 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 990 /// integer type. 991 QualType getPromotedIntegerType(QualType PromotableType); 992 993 /// \brief Whether this is a promotable bitfield reference according 994 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 995 /// 996 /// \returns the type this bit-field will promote to, or NULL if no 997 /// promotion occurs. 998 QualType isPromotableBitField(Expr *E); 999 1000 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1001 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1002 /// LHS < RHS, return -1. 1003 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1004 1005 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1006 /// point types, ignoring the domain of the type (i.e. 'double' == 1007 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1008 /// LHS < RHS, return -1. 1009 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1010 1011 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1012 /// point or a complex type (based on typeDomain/typeSize). 1013 /// 'typeDomain' is a real floating point or complex type. 1014 /// 'typeSize' is a real floating point or complex type. 1015 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1016 QualType typeDomain) const; 1017 1018private: 1019 // Helper for integer ordering 1020 unsigned getIntegerRank(Type* T); 1021 1022public: 1023 1024 //===--------------------------------------------------------------------===// 1025 // Type Compatibility Predicates 1026 //===--------------------------------------------------------------------===// 1027 1028 /// Compatibility predicates used to check assignment expressions. 1029 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1030 1031 bool isObjCIdType(QualType T) const { 1032 return T == ObjCIdTypedefType; 1033 } 1034 bool isObjCClassType(QualType T) const { 1035 return T == ObjCClassTypedefType; 1036 } 1037 bool isObjCSelType(QualType T) const { 1038 return T == ObjCSelTypedefType; 1039 } 1040 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1041 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1042 bool ForCompare); 1043 1044 // Check the safety of assignment from LHS to RHS 1045 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1046 const ObjCObjectPointerType *RHSOPT); 1047 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1048 const ObjCInterfaceType *RHS); 1049 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1050 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1051 const ObjCObjectPointerType *RHSOPT); 1052 1053 // Functions for calculating composite types 1054 QualType mergeTypes(QualType, QualType); 1055 QualType mergeFunctionTypes(QualType, QualType); 1056 1057 /// UsualArithmeticConversionsType - handles the various conversions 1058 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1059 /// and returns the result type of that conversion. 1060 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1061 1062 //===--------------------------------------------------------------------===// 1063 // Integer Predicates 1064 //===--------------------------------------------------------------------===// 1065 1066 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1067 // of bits in an integer type excluding any padding bits. 1068 unsigned getIntWidth(QualType T); 1069 1070 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1071 // unsigned integer type. This method takes a signed type, and returns the 1072 // corresponding unsigned integer type. 1073 QualType getCorrespondingUnsignedType(QualType T); 1074 1075 //===--------------------------------------------------------------------===// 1076 // Type Iterators. 1077 //===--------------------------------------------------------------------===// 1078 1079 typedef std::vector<Type*>::iterator type_iterator; 1080 typedef std::vector<Type*>::const_iterator const_type_iterator; 1081 1082 type_iterator types_begin() { return Types.begin(); } 1083 type_iterator types_end() { return Types.end(); } 1084 const_type_iterator types_begin() const { return Types.begin(); } 1085 const_type_iterator types_end() const { return Types.end(); } 1086 1087 //===--------------------------------------------------------------------===// 1088 // Integer Values 1089 //===--------------------------------------------------------------------===// 1090 1091 /// MakeIntValue - Make an APSInt of the appropriate width and 1092 /// signedness for the given \arg Value and integer \arg Type. 1093 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1094 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1095 Res = Value; 1096 return Res; 1097 } 1098 1099 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1100 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1101 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1102 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1103 1104 /// \brief Set the implementation of ObjCInterfaceDecl. 1105 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1106 ObjCImplementationDecl *ImplD); 1107 /// \brief Set the implementation of ObjCCategoryDecl. 1108 void setObjCImplementation(ObjCCategoryDecl *CatD, 1109 ObjCCategoryImplDecl *ImplD); 1110 1111 /// \brief Allocate an uninitialized DeclaratorInfo. 1112 /// 1113 /// The caller should initialize the memory held by DeclaratorInfo using 1114 /// the TypeLoc wrappers. 1115 /// 1116 /// \param T the type that will be the basis for type source info. This type 1117 /// should refer to how the declarator was written in source code, not to 1118 /// what type semantic analysis resolved the declarator to. 1119 /// 1120 /// \param Size the size of the type info to create, or 0 if the size 1121 /// should be calculated based on the type. 1122 DeclaratorInfo *CreateDeclaratorInfo(QualType T, unsigned Size = 0); 1123 1124 /// \brief Allocate a DeclaratorInfo where all locations have been 1125 /// initialized to a given location, which defaults to the empty 1126 /// location. 1127 DeclaratorInfo * 1128 getTrivialDeclaratorInfo(QualType T, SourceLocation Loc = SourceLocation()); 1129 1130private: 1131 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1132 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1133 1134 void InitBuiltinTypes(); 1135 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1136 1137 // Return the ObjC type encoding for a given type. 1138 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1139 bool ExpandPointedToStructures, 1140 bool ExpandStructures, 1141 const FieldDecl *Field, 1142 bool OutermostType = false, 1143 bool EncodingProperty = false); 1144 1145 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1146 const ObjCImplementationDecl *Impl); 1147}; 1148 1149/// @brief Utility function for constructing a nullary selector. 1150static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1151 IdentifierInfo* II = &Ctx.Idents.get(name); 1152 return Ctx.Selectors.getSelector(0, &II); 1153} 1154 1155/// @brief Utility function for constructing an unary selector. 1156static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1157 IdentifierInfo* II = &Ctx.Idents.get(name); 1158 return Ctx.Selectors.getSelector(1, &II); 1159} 1160 1161} // end namespace clang 1162 1163// operator new and delete aren't allowed inside namespaces. 1164// The throw specifications are mandated by the standard. 1165/// @brief Placement new for using the ASTContext's allocator. 1166/// 1167/// This placement form of operator new uses the ASTContext's allocator for 1168/// obtaining memory. It is a non-throwing new, which means that it returns 1169/// null on error. (If that is what the allocator does. The current does, so if 1170/// this ever changes, this operator will have to be changed, too.) 1171/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1172/// @code 1173/// // Default alignment (16) 1174/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1175/// // Specific alignment 1176/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1177/// @endcode 1178/// Please note that you cannot use delete on the pointer; it must be 1179/// deallocated using an explicit destructor call followed by 1180/// @c Context.Deallocate(Ptr). 1181/// 1182/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1183/// @param C The ASTContext that provides the allocator. 1184/// @param Alignment The alignment of the allocated memory (if the underlying 1185/// allocator supports it). 1186/// @return The allocated memory. Could be NULL. 1187inline void *operator new(size_t Bytes, clang::ASTContext &C, 1188 size_t Alignment) throw () { 1189 return C.Allocate(Bytes, Alignment); 1190} 1191/// @brief Placement delete companion to the new above. 1192/// 1193/// This operator is just a companion to the new above. There is no way of 1194/// invoking it directly; see the new operator for more details. This operator 1195/// is called implicitly by the compiler if a placement new expression using 1196/// the ASTContext throws in the object constructor. 1197inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1198 throw () { 1199 C.Deallocate(Ptr); 1200} 1201 1202/// This placement form of operator new[] uses the ASTContext's allocator for 1203/// obtaining memory. It is a non-throwing new[], which means that it returns 1204/// null on error. 1205/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1206/// @code 1207/// // Default alignment (16) 1208/// char *data = new (Context) char[10]; 1209/// // Specific alignment 1210/// char *data = new (Context, 8) char[10]; 1211/// @endcode 1212/// Please note that you cannot use delete on the pointer; it must be 1213/// deallocated using an explicit destructor call followed by 1214/// @c Context.Deallocate(Ptr). 1215/// 1216/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1217/// @param C The ASTContext that provides the allocator. 1218/// @param Alignment The alignment of the allocated memory (if the underlying 1219/// allocator supports it). 1220/// @return The allocated memory. Could be NULL. 1221inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1222 size_t Alignment = 16) throw () { 1223 return C.Allocate(Bytes, Alignment); 1224} 1225 1226/// @brief Placement delete[] companion to the new[] above. 1227/// 1228/// This operator is just a companion to the new[] above. There is no way of 1229/// invoking it directly; see the new[] operator for more details. This operator 1230/// is called implicitly by the compiler if a placement new[] expression using 1231/// the ASTContext throws in the object constructor. 1232inline void operator delete[](void *Ptr, clang::ASTContext &C) throw () { 1233 C.Deallocate(Ptr); 1234} 1235 1236#endif 1237