ASTContext.h revision a4923eb7c4b04d360cb2747641a5e92818edf804
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 Expr; 41 class ExternalASTSource; 42 class IdentifierTable; 43 class SelectorTable; 44 class SourceManager; 45 class TargetInfo; 46 // Decls 47 class Decl; 48 class FieldDecl; 49 class ObjCIvarDecl; 50 class ObjCIvarRefExpr; 51 class ObjCPropertyDecl; 52 class RecordDecl; 53 class TagDecl; 54 class TemplateTypeParmDecl; 55 class TranslationUnitDecl; 56 class TypeDecl; 57 class TypedefDecl; 58 class UnresolvedUsingDecl; 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 ObjCSelType; 124 const RecordType *SelStructType; 125 126 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 127 QualType ObjCProtoType; 128 const RecordType *ProtoStructType; 129 130 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 131 QualType ObjCClassTypedefType; 132 133 QualType ObjCConstantStringType; 134 RecordDecl *CFConstantStringTypeDecl; 135 136 RecordDecl *ObjCFastEnumerationStateTypeDecl; 137 138 /// \brief The type for the C FILE type. 139 TypeDecl *FILEDecl; 140 141 /// \brief The type for the C jmp_buf type. 142 TypeDecl *jmp_bufDecl; 143 144 /// \brief The type for the C sigjmp_buf type. 145 TypeDecl *sigjmp_bufDecl; 146 147 /// \brief Type for the Block descriptor for Blocks CodeGen. 148 RecordDecl *BlockDescriptorType; 149 150 /// \brief Type for the Block descriptor for Blocks CodeGen. 151 RecordDecl *BlockDescriptorExtendedType; 152 153 /// \brief Keeps track of all declaration attributes. 154 /// 155 /// Since so few decls have attrs, we keep them in a hash map instead of 156 /// wasting space in the Decl class. 157 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 158 159 /// \brief Keeps track of the static data member templates from which 160 /// static data members of class template specializations were instantiated. 161 /// 162 /// This data structure stores the mapping from instantiations of static 163 /// data members to the static data member representations within the 164 /// class template from which they were instantiated along with the kind 165 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 166 /// 167 /// Given the following example: 168 /// 169 /// \code 170 /// template<typename T> 171 /// struct X { 172 /// static T value; 173 /// }; 174 /// 175 /// template<typename T> 176 /// T X<T>::value = T(17); 177 /// 178 /// int *x = &X<int>::value; 179 /// \endcode 180 /// 181 /// This mapping will contain an entry that maps from the VarDecl for 182 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 183 /// class template X) and will be marked TSK_ImplicitInstantiation. 184 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 185 InstantiatedFromStaticDataMember; 186 187 /// \brief Keeps track of the UnresolvedUsingDecls from which UsingDecls 188 /// where created during instantiation. 189 /// 190 /// For example: 191 /// \code 192 /// template<typename T> 193 /// struct A { 194 /// void f(); 195 /// }; 196 /// 197 /// template<typename T> 198 /// struct B : A<T> { 199 /// using A<T>::f; 200 /// }; 201 /// 202 /// template struct B<int>; 203 /// \endcode 204 /// 205 /// This mapping will contain an entry that maps from the UsingDecl in 206 /// B<int> to the UnresolvedUsingDecl in B<T>. 207 llvm::DenseMap<UsingDecl *, UnresolvedUsingDecl *> 208 InstantiatedFromUnresolvedUsingDecl; 209 210 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 211 212 TranslationUnitDecl *TUDecl; 213 214 /// SourceMgr - The associated SourceManager object. 215 SourceManager &SourceMgr; 216 217 /// LangOpts - The language options used to create the AST associated with 218 /// this ASTContext object. 219 LangOptions LangOpts; 220 221 /// \brief Whether we have already loaded comment source ranges from an 222 /// external source. 223 bool LoadedExternalComments; 224 225 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 226 bool FreeMemory; 227 llvm::MallocAllocator MallocAlloc; 228 llvm::BumpPtrAllocator BumpAlloc; 229 230 /// \brief Mapping from declarations to their comments, once we have 231 /// already looked up the comment associated with a given declaration. 232 llvm::DenseMap<const Decl *, std::string> DeclComments; 233 234public: 235 const TargetInfo &Target; 236 IdentifierTable &Idents; 237 SelectorTable &Selectors; 238 Builtin::Context &BuiltinInfo; 239 DeclarationNameTable DeclarationNames; 240 llvm::OwningPtr<ExternalASTSource> ExternalSource; 241 clang::PrintingPolicy PrintingPolicy; 242 243 // Typedefs which may be provided defining the structure of Objective-C 244 // pseudo-builtins 245 QualType ObjCIdRedefinitionType; 246 QualType ObjCClassRedefinitionType; 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 UnresolvedUsingDecl *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, 292 UnresolvedUsingDecl *Tmpl); 293 294 295 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 296 297 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 298 299 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 300 301 302 const char *getCommentForDecl(const Decl *D); 303 304 // Builtin Types. 305 CanQualType VoidTy; 306 CanQualType BoolTy; 307 CanQualType CharTy; 308 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 309 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 310 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 311 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 312 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 313 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 314 CanQualType FloatTy, DoubleTy, LongDoubleTy; 315 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 316 CanQualType VoidPtrTy, NullPtrTy; 317 CanQualType OverloadTy; 318 CanQualType DependentTy; 319 CanQualType UndeducedAutoTy; 320 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy; 321 322 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 323 IdentifierTable &idents, SelectorTable &sels, 324 Builtin::Context &builtins, 325 bool FreeMemory = true, unsigned size_reserve=0); 326 327 ~ASTContext(); 328 329 /// \brief Attach an external AST source to the AST context. 330 /// 331 /// The external AST source provides the ability to load parts of 332 /// the abstract syntax tree as needed from some external storage, 333 /// e.g., a precompiled header. 334 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 335 336 /// \brief Retrieve a pointer to the external AST source associated 337 /// with this AST context, if any. 338 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 339 340 void PrintStats() const; 341 const std::vector<Type*>& getTypes() const { return Types; } 342 343 //===--------------------------------------------------------------------===// 344 // Type Constructors 345 //===--------------------------------------------------------------------===// 346 347private: 348 /// getExtQualType - Return a type with extended qualifiers. 349 QualType getExtQualType(const Type *Base, Qualifiers Quals); 350 351public: 352 /// getAddSpaceQualType - Return the uniqued reference to the type for an 353 /// address space qualified type with the specified type and address space. 354 /// The resulting type has a union of the qualifiers from T and the address 355 /// space. If T already has an address space specifier, it is silently 356 /// replaced. 357 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 358 359 /// getObjCGCQualType - Returns the uniqued reference to the type for an 360 /// objc gc qualified type. The retulting type has a union of the qualifiers 361 /// from T and the gc attribute. 362 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 363 364 /// getRestrictType - Returns the uniqued reference to the type for a 365 /// 'restrict' qualified type. The resulting type has a union of the 366 /// qualifiers from T and 'restrict'. 367 QualType getRestrictType(QualType T) { 368 return T.withFastQualifiers(Qualifiers::Restrict); 369 } 370 371 /// getVolatileType - Returns the uniqued reference to the type for a 372 /// 'volatile' qualified type. The resulting type has a union of the 373 /// qualifiers from T and 'volatile'. 374 QualType getVolatileType(QualType T); 375 376 /// getConstType - Returns the uniqued reference to the type for a 377 /// 'const' qualified type. The resulting type has a union of the 378 /// qualifiers from T and 'const'. 379 /// 380 /// It can be reasonably expected that this will always be 381 /// equivalent to calling T.withConst(). 382 QualType getConstType(QualType T) { return T.withConst(); } 383 384 /// getNoReturnType - Add the noreturn attribute to the given type which must 385 /// be a FunctionType or a pointer to an allowable type or a BlockPointer. 386 QualType getNoReturnType(QualType T); 387 388 /// getComplexType - Return the uniqued reference to the type for a complex 389 /// number with the specified element type. 390 QualType getComplexType(QualType T); 391 CanQualType getComplexType(CanQualType T) { 392 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 393 } 394 395 /// getPointerType - Return the uniqued reference to the type for a pointer to 396 /// the specified type. 397 QualType getPointerType(QualType T); 398 CanQualType getPointerType(CanQualType T) { 399 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 400 } 401 402 /// getBlockPointerType - Return the uniqued reference to the type for a block 403 /// of the specified type. 404 QualType getBlockPointerType(QualType T); 405 406 /// This gets the struct used to keep track of the descriptor for pointer to 407 /// blocks. 408 QualType getBlockDescriptorType(); 409 410 // Set the type for a Block descriptor type. 411 void setBlockDescriptorType(QualType T); 412 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 413 QualType getRawBlockdescriptorType() { 414 if (BlockDescriptorType) 415 return getTagDeclType(BlockDescriptorType); 416 return QualType(); 417 } 418 419 /// This gets the struct used to keep track of the extended descriptor for 420 /// pointer to blocks. 421 QualType getBlockDescriptorExtendedType(); 422 423 // Set the type for a Block descriptor extended type. 424 void setBlockDescriptorExtendedType(QualType T); 425 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 426 /// built. 427 QualType getRawBlockdescriptorExtendedType() { 428 if (BlockDescriptorExtendedType) 429 return getTagDeclType(BlockDescriptorExtendedType); 430 return QualType(); 431 } 432 433 /// This gets the struct used to keep track of pointer to blocks, complete 434 /// with captured variables. 435 QualType getBlockParmType(bool BlockHasCopyDispose, 436 llvm::SmallVector<const Expr *, 8> &BDRDs); 437 438 /// This builds the struct used for __block variables. 439 QualType BuildByRefType(const char *DeclName, QualType Ty); 440 441 /// Returns true iff we need copy/dispose helpers for the given type. 442 bool BlockRequiresCopying(QualType Ty); 443 444 /// getLValueReferenceType - Return the uniqued reference to the type for an 445 /// lvalue reference to the specified type. 446 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 447 448 /// getRValueReferenceType - Return the uniqued reference to the type for an 449 /// rvalue reference to the specified type. 450 QualType getRValueReferenceType(QualType T); 451 452 /// getMemberPointerType - Return the uniqued reference to the type for a 453 /// member pointer to the specified type in the specified class. The class 454 /// is a Type because it could be a dependent name. 455 QualType getMemberPointerType(QualType T, const Type *Cls); 456 457 /// getVariableArrayType - Returns a non-unique reference to the type for a 458 /// variable array of the specified element type. 459 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 460 ArrayType::ArraySizeModifier ASM, 461 unsigned EltTypeQuals, 462 SourceRange Brackets); 463 464 /// getDependentSizedArrayType - Returns a non-unique reference to 465 /// the type for a dependently-sized array of the specified element 466 /// type. FIXME: We will need these to be uniqued, or at least 467 /// comparable, at some point. 468 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 469 ArrayType::ArraySizeModifier ASM, 470 unsigned EltTypeQuals, 471 SourceRange Brackets); 472 473 /// getIncompleteArrayType - Returns a unique reference to the type for a 474 /// incomplete array of the specified element type. 475 QualType getIncompleteArrayType(QualType EltTy, 476 ArrayType::ArraySizeModifier ASM, 477 unsigned EltTypeQuals); 478 479 /// getConstantArrayType - Return the unique reference to the type for a 480 /// constant array of the specified element type. 481 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 482 ArrayType::ArraySizeModifier ASM, 483 unsigned EltTypeQuals); 484 485 /// getVectorType - Return the unique reference to a vector type of 486 /// the specified element type and size. VectorType must be a built-in type. 487 QualType getVectorType(QualType VectorType, unsigned NumElts); 488 489 /// getExtVectorType - Return the unique reference to an extended vector type 490 /// of the specified element type and size. VectorType must be a built-in 491 /// type. 492 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 493 494 /// getDependentSizedExtVectorType - Returns a non-unique reference to 495 /// the type for a dependently-sized vector of the specified element 496 /// type. FIXME: We will need these to be uniqued, or at least 497 /// comparable, at some point. 498 QualType getDependentSizedExtVectorType(QualType VectorType, 499 Expr *SizeExpr, 500 SourceLocation AttrLoc); 501 502 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 503 /// 504 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false); 505 506 /// getFunctionType - Return a normal function type with a typed argument 507 /// list. isVariadic indicates whether the argument list includes '...'. 508 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 509 unsigned NumArgs, bool isVariadic, 510 unsigned TypeQuals, bool hasExceptionSpec = false, 511 bool hasAnyExceptionSpec = false, 512 unsigned NumExs = 0, const QualType *ExArray = 0, 513 bool NoReturn = false); 514 515 /// getTypeDeclType - Return the unique reference to the type for 516 /// the specified type declaration. 517 QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0); 518 519 /// getTypedefType - Return the unique reference to the type for the 520 /// specified typename decl. 521 QualType getTypedefType(TypedefDecl *Decl); 522 523 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 524 QualType Replacement); 525 526 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 527 bool ParameterPack, 528 IdentifierInfo *Name = 0); 529 530 QualType getTemplateSpecializationType(TemplateName T, 531 const TemplateArgument *Args, 532 unsigned NumArgs, 533 QualType Canon = QualType()); 534 535 QualType getTemplateSpecializationType(TemplateName T, 536 const TemplateArgumentLoc *Args, 537 unsigned NumArgs, 538 QualType Canon = QualType()); 539 540 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 541 QualType NamedType); 542 QualType getTypenameType(NestedNameSpecifier *NNS, 543 const IdentifierInfo *Name, 544 QualType Canon = QualType()); 545 QualType getTypenameType(NestedNameSpecifier *NNS, 546 const TemplateSpecializationType *TemplateId, 547 QualType Canon = QualType()); 548 QualType getElaboratedType(QualType UnderlyingType, 549 ElaboratedType::TagKind Tag); 550 551 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 552 ObjCProtocolDecl **Protocols = 0, 553 unsigned NumProtocols = 0); 554 555 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 556 /// given interface decl and the conforming protocol list. 557 QualType getObjCObjectPointerType(QualType OIT, 558 ObjCProtocolDecl **ProtocolList = 0, 559 unsigned NumProtocols = 0); 560 561 /// getTypeOfType - GCC extension. 562 QualType getTypeOfExprType(Expr *e); 563 QualType getTypeOfType(QualType t); 564 565 /// getDecltypeType - C++0x decltype. 566 QualType getDecltypeType(Expr *e); 567 568 /// getTagDeclType - Return the unique reference to the type for the 569 /// specified TagDecl (struct/union/class/enum) decl. 570 QualType getTagDeclType(const TagDecl *Decl); 571 572 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 573 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 574 QualType getSizeType() const; 575 576 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 577 /// returns a type compatible with the type defined in <stddef.h> as defined 578 /// by the target. 579 QualType getWCharType() const { return WCharTy; } 580 581 /// getSignedWCharType - Return the type of "signed wchar_t". 582 /// Used when in C++, as a GCC extension. 583 QualType getSignedWCharType() const; 584 585 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 586 /// Used when in C++, as a GCC extension. 587 QualType getUnsignedWCharType() const; 588 589 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 590 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 591 QualType getPointerDiffType() const; 592 593 // getCFConstantStringType - Return the C structure type used to represent 594 // constant CFStrings. 595 QualType getCFConstantStringType(); 596 597 /// Get the structure type used to representation CFStrings, or NULL 598 /// if it hasn't yet been built. 599 QualType getRawCFConstantStringType() { 600 if (CFConstantStringTypeDecl) 601 return getTagDeclType(CFConstantStringTypeDecl); 602 return QualType(); 603 } 604 void setCFConstantStringType(QualType T); 605 606 // This setter/getter represents the ObjC type for an NSConstantString. 607 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 608 QualType getObjCConstantStringInterface() const { 609 return ObjCConstantStringType; 610 } 611 612 //// This gets the struct used to keep track of fast enumerations. 613 QualType getObjCFastEnumerationStateType(); 614 615 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 616 /// been built. 617 QualType getRawObjCFastEnumerationStateType() { 618 if (ObjCFastEnumerationStateTypeDecl) 619 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 620 return QualType(); 621 } 622 623 void setObjCFastEnumerationStateType(QualType T); 624 625 /// \brief Set the type for the C FILE type. 626 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 627 628 /// \brief Retrieve the C FILE type. 629 QualType getFILEType() { 630 if (FILEDecl) 631 return getTypeDeclType(FILEDecl); 632 return QualType(); 633 } 634 635 /// \brief Set the type for the C jmp_buf type. 636 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 637 this->jmp_bufDecl = jmp_bufDecl; 638 } 639 640 /// \brief Retrieve the C jmp_buf type. 641 QualType getjmp_bufType() { 642 if (jmp_bufDecl) 643 return getTypeDeclType(jmp_bufDecl); 644 return QualType(); 645 } 646 647 /// \brief Set the type for the C sigjmp_buf type. 648 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 649 this->sigjmp_bufDecl = sigjmp_bufDecl; 650 } 651 652 /// \brief Retrieve the C sigjmp_buf type. 653 QualType getsigjmp_bufType() { 654 if (sigjmp_bufDecl) 655 return getTypeDeclType(sigjmp_bufDecl); 656 return QualType(); 657 } 658 659 /// getObjCEncodingForType - Emit the ObjC type encoding for the 660 /// given type into \arg S. If \arg NameFields is specified then 661 /// record field names are also encoded. 662 void getObjCEncodingForType(QualType t, std::string &S, 663 const FieldDecl *Field=0); 664 665 void getLegacyIntegralTypeEncoding(QualType &t) const; 666 667 // Put the string version of type qualifiers into S. 668 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 669 std::string &S) const; 670 671 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 672 /// declaration. 673 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 674 675 /// getObjCEncodingForPropertyDecl - Return the encoded type for 676 /// this method declaration. If non-NULL, Container must be either 677 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 678 /// only be NULL when getting encodings for protocol properties. 679 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 680 const Decl *Container, 681 std::string &S); 682 683 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 684 ObjCProtocolDecl *rProto); 685 686 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 687 /// purpose. 688 int getObjCEncodingTypeSize(QualType t); 689 690 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 691 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 692 QualType getObjCIdType() const { return ObjCIdTypedefType; } 693 void setObjCIdType(QualType T); 694 695 void setObjCSelType(QualType T); 696 QualType getObjCSelType() const { return ObjCSelType; } 697 698 void setObjCProtoType(QualType QT); 699 QualType getObjCProtoType() const { return ObjCProtoType; } 700 701 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 702 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 703 /// struct. 704 QualType getObjCClassType() const { return ObjCClassTypedefType; } 705 void setObjCClassType(QualType T); 706 707 void setBuiltinVaListType(QualType T); 708 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 709 710 QualType getFixedWidthIntType(unsigned Width, bool Signed); 711 712 /// getCVRQualifiedType - Returns a type with additional const, 713 /// volatile, or restrict qualifiers. 714 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 715 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 716 } 717 718 /// getQualifiedType - Returns a type with additional qualifiers. 719 QualType getQualifiedType(QualType T, Qualifiers Qs) { 720 if (!Qs.hasNonFastQualifiers()) 721 return T.withFastQualifiers(Qs.getFastQualifiers()); 722 QualifierCollector Qc(Qs); 723 const Type *Ptr = Qc.strip(T); 724 return getExtQualType(Ptr, Qc); 725 } 726 727 /// getQualifiedType - Returns a type with additional qualifiers. 728 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 729 if (!Qs.hasNonFastQualifiers()) 730 return QualType(T, Qs.getFastQualifiers()); 731 return getExtQualType(T, Qs); 732 } 733 734 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 735 bool TemplateKeyword, 736 TemplateDecl *Template); 737 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 738 bool TemplateKeyword, 739 OverloadedFunctionDecl *Template); 740 741 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 742 const IdentifierInfo *Name); 743 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 744 OverloadedOperatorKind Operator); 745 746 enum GetBuiltinTypeError { 747 GE_None, //< No error 748 GE_Missing_stdio, //< Missing a type from <stdio.h> 749 GE_Missing_setjmp //< Missing a type from <setjmp.h> 750 }; 751 752 /// GetBuiltinType - Return the type for the specified builtin. 753 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 754 755private: 756 CanQualType getFromTargetType(unsigned Type) const; 757 758 //===--------------------------------------------------------------------===// 759 // Type Predicates. 760 //===--------------------------------------------------------------------===// 761 762public: 763 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 764 /// garbage collection attribute. 765 /// 766 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 767 768 /// isObjCNSObjectType - Return true if this is an NSObject object with 769 /// its NSObject attribute set. 770 bool isObjCNSObjectType(QualType Ty) const; 771 772 //===--------------------------------------------------------------------===// 773 // Type Sizing and Analysis 774 //===--------------------------------------------------------------------===// 775 776 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 777 /// scalar floating point type. 778 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 779 780 /// getTypeInfo - Get the size and alignment of the specified complete type in 781 /// bits. 782 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 783 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 784 return getTypeInfo(T.getTypePtr()); 785 } 786 787 /// getTypeSize - Return the size of the specified type, in bits. This method 788 /// does not work on incomplete types. 789 uint64_t getTypeSize(QualType T) { 790 return getTypeInfo(T).first; 791 } 792 uint64_t getTypeSize(const Type *T) { 793 return getTypeInfo(T).first; 794 } 795 796 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 797 /// This method does not work on incomplete types. 798 unsigned getTypeAlign(QualType T) { 799 return getTypeInfo(T).second; 800 } 801 unsigned getTypeAlign(const Type *T) { 802 return getTypeInfo(T).second; 803 } 804 805 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 806 /// type for the current target in bits. This can be different than the ABI 807 /// alignment in cases where it is beneficial for performance to overalign 808 /// a data type. 809 unsigned getPreferredTypeAlign(const Type *T); 810 811 /// getDeclAlignInBytes - Return the alignment of the specified decl 812 /// that should be returned by __alignof(). Note that bitfields do 813 /// not have a valid alignment, so this method will assert on them. 814 unsigned getDeclAlignInBytes(const Decl *D); 815 816 /// getASTRecordLayout - Get or compute information about the layout of the 817 /// specified record (struct/union/class), which indicates its size and field 818 /// position information. 819 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 820 821 /// getASTObjCInterfaceLayout - Get or compute information about the 822 /// layout of the specified Objective-C interface. 823 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 824 825 /// getASTObjCImplementationLayout - Get or compute information about 826 /// the layout of the specified Objective-C implementation. This may 827 /// differ from the interface if synthesized ivars are present. 828 const ASTRecordLayout & 829 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 830 831 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 832 llvm::SmallVectorImpl<FieldDecl*> &Fields); 833 834 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 835 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 836 bool CollectSynthesized = true); 837 void CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 838 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 839 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 840 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 841 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 842 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 843 void CollectInheritedProtocols(const Decl *CDecl, 844 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols); 845 846 //===--------------------------------------------------------------------===// 847 // Type Operators 848 //===--------------------------------------------------------------------===// 849 850 /// getCanonicalType - Return the canonical (structural) type corresponding to 851 /// the specified potentially non-canonical type. The non-canonical version 852 /// of a type may have many "decorated" versions of types. Decorators can 853 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 854 /// to be free of any of these, allowing two canonical types to be compared 855 /// for exact equality with a simple pointer comparison. 856 CanQualType getCanonicalType(QualType T); 857 const Type *getCanonicalType(const Type *T) { 858 return T->getCanonicalTypeInternal().getTypePtr(); 859 } 860 861 /// getCanonicalParamType - Return the canonical parameter type 862 /// corresponding to the specific potentially non-canonical one. 863 /// Qualifiers are stripped off, functions are turned into function 864 /// pointers, and arrays decay one level into pointers. 865 CanQualType getCanonicalParamType(QualType T); 866 867 /// \brief Determine whether the given types are equivalent. 868 bool hasSameType(QualType T1, QualType T2) { 869 return getCanonicalType(T1) == getCanonicalType(T2); 870 } 871 872 /// \brief Determine whether the given types are equivalent after 873 /// cvr-qualifiers have been removed. 874 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 875 CanQualType CT1 = getCanonicalType(T1); 876 CanQualType CT2 = getCanonicalType(T2); 877 return CT1.getUnqualifiedType() == CT2.getUnqualifiedType(); 878 } 879 880 /// \brief Retrieves the "canonical" declaration of 881 882 /// \brief Retrieves the "canonical" nested name specifier for a 883 /// given nested name specifier. 884 /// 885 /// The canonical nested name specifier is a nested name specifier 886 /// that uniquely identifies a type or namespace within the type 887 /// system. For example, given: 888 /// 889 /// \code 890 /// namespace N { 891 /// struct S { 892 /// template<typename T> struct X { typename T* type; }; 893 /// }; 894 /// } 895 /// 896 /// template<typename T> struct Y { 897 /// typename N::S::X<T>::type member; 898 /// }; 899 /// \endcode 900 /// 901 /// Here, the nested-name-specifier for N::S::X<T>:: will be 902 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 903 /// by declarations in the type system and the canonical type for 904 /// the template type parameter 'T' is template-param-0-0. 905 NestedNameSpecifier * 906 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 907 908 /// \brief Retrieves the "canonical" template name that refers to a 909 /// given template. 910 /// 911 /// The canonical template name is the simplest expression that can 912 /// be used to refer to a given template. For most templates, this 913 /// expression is just the template declaration itself. For example, 914 /// the template std::vector can be referred to via a variety of 915 /// names---std::vector, ::std::vector, vector (if vector is in 916 /// scope), etc.---but all of these names map down to the same 917 /// TemplateDecl, which is used to form the canonical template name. 918 /// 919 /// Dependent template names are more interesting. Here, the 920 /// template name could be something like T::template apply or 921 /// std::allocator<T>::template rebind, where the nested name 922 /// specifier itself is dependent. In this case, the canonical 923 /// template name uses the shortest form of the dependent 924 /// nested-name-specifier, which itself contains all canonical 925 /// types, values, and templates. 926 TemplateName getCanonicalTemplateName(TemplateName Name); 927 928 /// \brief Determine whether the given template names refer to the same 929 /// template. 930 bool hasSameTemplateName(TemplateName X, TemplateName Y); 931 932 /// \brief Retrieve the "canonical" template argument. 933 /// 934 /// The canonical template argument is the simplest template argument 935 /// (which may be a type, value, expression, or declaration) that 936 /// expresses the value of the argument. 937 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 938 939 /// Type Query functions. If the type is an instance of the specified class, 940 /// return the Type pointer for the underlying maximally pretty type. This 941 /// is a member of ASTContext because this may need to do some amount of 942 /// canonicalization, e.g. to move type qualifiers into the element type. 943 const ArrayType *getAsArrayType(QualType T); 944 const ConstantArrayType *getAsConstantArrayType(QualType T) { 945 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 946 } 947 const VariableArrayType *getAsVariableArrayType(QualType T) { 948 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 949 } 950 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 951 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 952 } 953 954 /// getBaseElementType - Returns the innermost element type of an array type. 955 /// For example, will return "int" for int[m][n] 956 QualType getBaseElementType(const ArrayType *VAT); 957 958 /// getBaseElementType - Returns the innermost element type of a type 959 /// (which needn't actually be an array type). 960 QualType getBaseElementType(QualType QT); 961 962 /// getConstantArrayElementCount - Returns number of constant array elements. 963 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 964 965 /// getArrayDecayedType - Return the properly qualified result of decaying the 966 /// specified array type to a pointer. This operation is non-trivial when 967 /// handling typedefs etc. The canonical type of "T" must be an array type, 968 /// this returns a pointer to a properly qualified element of the array. 969 /// 970 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 971 QualType getArrayDecayedType(QualType T); 972 973 /// getPromotedIntegerType - Returns the type that Promotable will 974 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 975 /// integer type. 976 QualType getPromotedIntegerType(QualType PromotableType); 977 978 /// \brief Whether this is a promotable bitfield reference according 979 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 980 /// 981 /// \returns the type this bit-field will promote to, or NULL if no 982 /// promotion occurs. 983 QualType isPromotableBitField(Expr *E); 984 985 /// getIntegerTypeOrder - Returns the highest ranked integer type: 986 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 987 /// LHS < RHS, return -1. 988 int getIntegerTypeOrder(QualType LHS, QualType RHS); 989 990 /// getFloatingTypeOrder - Compare the rank of the two specified floating 991 /// point types, ignoring the domain of the type (i.e. 'double' == 992 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 993 /// LHS < RHS, return -1. 994 int getFloatingTypeOrder(QualType LHS, QualType RHS); 995 996 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 997 /// point or a complex type (based on typeDomain/typeSize). 998 /// 'typeDomain' is a real floating point or complex type. 999 /// 'typeSize' is a real floating point or complex type. 1000 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1001 QualType typeDomain) const; 1002 1003private: 1004 // Helper for integer ordering 1005 unsigned getIntegerRank(Type* T); 1006 1007public: 1008 1009 //===--------------------------------------------------------------------===// 1010 // Type Compatibility Predicates 1011 //===--------------------------------------------------------------------===// 1012 1013 /// Compatibility predicates used to check assignment expressions. 1014 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1015 1016 bool isObjCIdType(QualType T) const { 1017 return T == ObjCIdTypedefType; 1018 } 1019 bool isObjCClassType(QualType T) const { 1020 return T == ObjCClassTypedefType; 1021 } 1022 bool isObjCSelType(QualType T) const { 1023 assert(SelStructType && "isObjCSelType used before 'SEL' type is built"); 1024 return T->getAsStructureType() == SelStructType; 1025 } 1026 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1027 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1028 bool ForCompare); 1029 1030 // Check the safety of assignment from LHS to RHS 1031 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1032 const ObjCObjectPointerType *RHSOPT); 1033 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1034 const ObjCInterfaceType *RHS); 1035 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1036 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1037 const ObjCObjectPointerType *RHSOPT); 1038 1039 // Functions for calculating composite types 1040 QualType mergeTypes(QualType, QualType); 1041 QualType mergeFunctionTypes(QualType, QualType); 1042 1043 /// UsualArithmeticConversionsType - handles the various conversions 1044 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1045 /// and returns the result type of that conversion. 1046 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1047 1048 //===--------------------------------------------------------------------===// 1049 // Integer Predicates 1050 //===--------------------------------------------------------------------===// 1051 1052 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1053 // of bits in an integer type excluding any padding bits. 1054 unsigned getIntWidth(QualType T); 1055 1056 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1057 // unsigned integer type. This method takes a signed type, and returns the 1058 // corresponding unsigned integer type. 1059 QualType getCorrespondingUnsignedType(QualType T); 1060 1061 //===--------------------------------------------------------------------===// 1062 // Type Iterators. 1063 //===--------------------------------------------------------------------===// 1064 1065 typedef std::vector<Type*>::iterator type_iterator; 1066 typedef std::vector<Type*>::const_iterator const_type_iterator; 1067 1068 type_iterator types_begin() { return Types.begin(); } 1069 type_iterator types_end() { return Types.end(); } 1070 const_type_iterator types_begin() const { return Types.begin(); } 1071 const_type_iterator types_end() const { return Types.end(); } 1072 1073 //===--------------------------------------------------------------------===// 1074 // Integer Values 1075 //===--------------------------------------------------------------------===// 1076 1077 /// MakeIntValue - Make an APSInt of the appropriate width and 1078 /// signedness for the given \arg Value and integer \arg Type. 1079 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1080 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1081 Res = Value; 1082 return Res; 1083 } 1084 1085 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1086 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1087 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1088 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1089 1090 /// \brief Set the implementation of ObjCInterfaceDecl. 1091 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1092 ObjCImplementationDecl *ImplD); 1093 /// \brief Set the implementation of ObjCCategoryDecl. 1094 void setObjCImplementation(ObjCCategoryDecl *CatD, 1095 ObjCCategoryImplDecl *ImplD); 1096 1097 /// \brief Allocate an uninitialized DeclaratorInfo. 1098 /// 1099 /// The caller should initialize the memory held by DeclaratorInfo using 1100 /// the TypeLoc wrappers. 1101 /// 1102 /// \param T the type that will be the basis for type source info. This type 1103 /// should refer to how the declarator was written in source code, not to 1104 /// what type semantic analysis resolved the declarator to. 1105 /// 1106 /// \param Size the size of the type info to create, or 0 if the size 1107 /// should be calculated based on the type. 1108 DeclaratorInfo *CreateDeclaratorInfo(QualType T, unsigned Size = 0); 1109 1110 /// \brief Allocate a DeclaratorInfo where all locations have been 1111 /// initialized to a given location, which defaults to the empty 1112 /// location. 1113 DeclaratorInfo * 1114 getTrivialDeclaratorInfo(QualType T, SourceLocation Loc = SourceLocation()); 1115 1116private: 1117 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1118 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1119 1120 void InitBuiltinTypes(); 1121 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1122 1123 // Return the ObjC type encoding for a given type. 1124 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1125 bool ExpandPointedToStructures, 1126 bool ExpandStructures, 1127 const FieldDecl *Field, 1128 bool OutermostType = false, 1129 bool EncodingProperty = false); 1130 1131 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1132 const ObjCImplementationDecl *Impl); 1133}; 1134 1135/// @brief Utility function for constructing a nullary selector. 1136static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1137 IdentifierInfo* II = &Ctx.Idents.get(name); 1138 return Ctx.Selectors.getSelector(0, &II); 1139} 1140 1141/// @brief Utility function for constructing an unary selector. 1142static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1143 IdentifierInfo* II = &Ctx.Idents.get(name); 1144 return Ctx.Selectors.getSelector(1, &II); 1145} 1146 1147} // end namespace clang 1148 1149// operator new and delete aren't allowed inside namespaces. 1150// The throw specifications are mandated by the standard. 1151/// @brief Placement new for using the ASTContext's allocator. 1152/// 1153/// This placement form of operator new uses the ASTContext's allocator for 1154/// obtaining memory. It is a non-throwing new, which means that it returns 1155/// null on error. (If that is what the allocator does. The current does, so if 1156/// this ever changes, this operator will have to be changed, too.) 1157/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1158/// @code 1159/// // Default alignment (16) 1160/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1161/// // Specific alignment 1162/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1163/// @endcode 1164/// Please note that you cannot use delete on the pointer; it must be 1165/// deallocated using an explicit destructor call followed by 1166/// @c Context.Deallocate(Ptr). 1167/// 1168/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1169/// @param C The ASTContext that provides the allocator. 1170/// @param Alignment The alignment of the allocated memory (if the underlying 1171/// allocator supports it). 1172/// @return The allocated memory. Could be NULL. 1173inline void *operator new(size_t Bytes, clang::ASTContext &C, 1174 size_t Alignment) throw () { 1175 return C.Allocate(Bytes, Alignment); 1176} 1177/// @brief Placement delete companion to the new above. 1178/// 1179/// This operator is just a companion to the new above. There is no way of 1180/// invoking it directly; see the new operator for more details. This operator 1181/// is called implicitly by the compiler if a placement new expression using 1182/// the ASTContext throws in the object constructor. 1183inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1184 throw () { 1185 C.Deallocate(Ptr); 1186} 1187 1188/// This placement form of operator new[] uses the ASTContext's allocator for 1189/// obtaining memory. It is a non-throwing new[], which means that it returns 1190/// null on error. 1191/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1192/// @code 1193/// // Default alignment (16) 1194/// char *data = new (Context) char[10]; 1195/// // Specific alignment 1196/// char *data = new (Context, 8) char[10]; 1197/// @endcode 1198/// Please note that you cannot use delete on the pointer; it must be 1199/// deallocated using an explicit destructor call followed by 1200/// @c Context.Deallocate(Ptr). 1201/// 1202/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1203/// @param C The ASTContext that provides the allocator. 1204/// @param Alignment The alignment of the allocated memory (if the underlying 1205/// allocator supports it). 1206/// @return The allocated memory. Could be NULL. 1207inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1208 size_t Alignment = 16) throw () { 1209 return C.Allocate(Bytes, Alignment); 1210} 1211 1212/// @brief Placement delete[] companion to the new[] above. 1213/// 1214/// This operator is just a companion to the new[] above. There is no way of 1215/// invoking it directly; see the new[] operator for more details. This operator 1216/// is called implicitly by the compiler if a placement new[] expression using 1217/// the ASTContext throws in the object constructor. 1218inline void operator delete[](void *Ptr, clang::ASTContext &C) throw () { 1219 C.Deallocate(Ptr); 1220} 1221 1222#endif 1223