ASTContext.h revision 4273f7068f16863f2469b45a3f00c3b4217bdbb4
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/CharUnits.h" 22#include "clang/AST/Decl.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/PrettyPrinter.h" 25#include "clang/AST/TemplateName.h" 26#include "clang/AST/Type.h" 27#include "clang/AST/CanonicalType.h" 28#include "llvm/ADT/DenseMap.h" 29#include "llvm/ADT/FoldingSet.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/Support/Allocator.h" 32#include <vector> 33 34namespace llvm { 35 struct fltSemantics; 36} 37 38namespace clang { 39 class FileManager; 40 class ASTRecordLayout; 41 class BlockExpr; 42 class Expr; 43 class ExternalASTSource; 44 class IdentifierTable; 45 class SelectorTable; 46 class SourceManager; 47 class TargetInfo; 48 // Decls 49 class CXXMethodDecl; 50 class CXXRecordDecl; 51 class Decl; 52 class FieldDecl; 53 class ObjCIvarDecl; 54 class ObjCIvarRefExpr; 55 class ObjCPropertyDecl; 56 class RecordDecl; 57 class TagDecl; 58 class TemplateTypeParmDecl; 59 class TranslationUnitDecl; 60 class TypeDecl; 61 class TypedefDecl; 62 class UsingDecl; 63 class UsingShadowDecl; 64 65 namespace Builtin { class Context; } 66 67/// ASTContext - This class holds long-lived AST nodes (such as types and 68/// decls) that can be referred to throughout the semantic analysis of a file. 69class ASTContext { 70 std::vector<Type*> Types; 71 llvm::FoldingSet<ExtQuals> ExtQualNodes; 72 llvm::FoldingSet<ComplexType> ComplexTypes; 73 llvm::FoldingSet<PointerType> PointerTypes; 74 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 75 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 76 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 77 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 78 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 79 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 80 std::vector<VariableArrayType*> VariableArrayTypes; 81 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 82 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 83 llvm::FoldingSet<VectorType> VectorTypes; 84 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 85 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 86 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 87 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 88 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 89 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 90 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 91 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 92 llvm::FoldingSet<TypenameType> TypenameTypes; 93 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 94 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 95 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 96 97 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 98 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 99 100 /// \brief The set of nested name specifiers. 101 /// 102 /// This set is managed by the NestedNameSpecifier class. 103 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 104 NestedNameSpecifier *GlobalNestedNameSpecifier; 105 friend class NestedNameSpecifier; 106 107 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 108 /// This is lazily created. This is intentionally not serialized. 109 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 110 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 111 112 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 113 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 114 115 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 116 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 117 118 llvm::DenseMap<unsigned, FixedWidthIntType*> SignedFixedWidthIntTypes; 119 llvm::DenseMap<unsigned, FixedWidthIntType*> UnsignedFixedWidthIntTypes; 120 121 /// BuiltinVaListType - built-in va list type. 122 /// This is initially null and set by Sema::LazilyCreateBuiltin when 123 /// a builtin that takes a valist is encountered. 124 QualType BuiltinVaListType; 125 126 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 127 QualType ObjCIdTypedefType; 128 129 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 130 QualType ObjCSelTypedefType; 131 132 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 133 QualType ObjCProtoType; 134 const RecordType *ProtoStructType; 135 136 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 137 QualType ObjCClassTypedefType; 138 139 QualType ObjCConstantStringType; 140 RecordDecl *CFConstantStringTypeDecl; 141 142 RecordDecl *ObjCFastEnumerationStateTypeDecl; 143 144 /// \brief The type for the C FILE type. 145 TypeDecl *FILEDecl; 146 147 /// \brief The type for the C jmp_buf type. 148 TypeDecl *jmp_bufDecl; 149 150 /// \brief The type for the C sigjmp_buf type. 151 TypeDecl *sigjmp_bufDecl; 152 153 /// \brief Type for the Block descriptor for Blocks CodeGen. 154 RecordDecl *BlockDescriptorType; 155 156 /// \brief Type for the Block descriptor for Blocks CodeGen. 157 RecordDecl *BlockDescriptorExtendedType; 158 159 /// \brief Keeps track of all declaration attributes. 160 /// 161 /// Since so few decls have attrs, we keep them in a hash map instead of 162 /// wasting space in the Decl class. 163 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 164 165 /// \brief Keeps track of the static data member templates from which 166 /// static data members of class template specializations were instantiated. 167 /// 168 /// This data structure stores the mapping from instantiations of static 169 /// data members to the static data member representations within the 170 /// class template from which they were instantiated along with the kind 171 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 172 /// 173 /// Given the following example: 174 /// 175 /// \code 176 /// template<typename T> 177 /// struct X { 178 /// static T value; 179 /// }; 180 /// 181 /// template<typename T> 182 /// T X<T>::value = T(17); 183 /// 184 /// int *x = &X<int>::value; 185 /// \endcode 186 /// 187 /// This mapping will contain an entry that maps from the VarDecl for 188 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 189 /// class template X) and will be marked TSK_ImplicitInstantiation. 190 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 191 InstantiatedFromStaticDataMember; 192 193 /// \brief Keeps track of the declaration from which a UsingDecl was 194 /// created during instantiation. The source declaration is always 195 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 196 /// UnresolvedUsingTypenameDecl. 197 /// 198 /// For example: 199 /// \code 200 /// template<typename T> 201 /// struct A { 202 /// void f(); 203 /// }; 204 /// 205 /// template<typename T> 206 /// struct B : A<T> { 207 /// using A<T>::f; 208 /// }; 209 /// 210 /// template struct B<int>; 211 /// \endcode 212 /// 213 /// This mapping will contain an entry that maps from the UsingDecl in 214 /// B<int> to the UnresolvedUsingDecl in B<T>. 215 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 216 217 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 218 InstantiatedFromUsingShadowDecl; 219 220 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 221 222 TranslationUnitDecl *TUDecl; 223 224 /// SourceMgr - The associated SourceManager object. 225 SourceManager &SourceMgr; 226 227 /// LangOpts - The language options used to create the AST associated with 228 /// this ASTContext object. 229 LangOptions LangOpts; 230 231 /// \brief Whether we have already loaded comment source ranges from an 232 /// external source. 233 bool LoadedExternalComments; 234 235 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 236 bool FreeMemory; 237 llvm::MallocAllocator MallocAlloc; 238 llvm::BumpPtrAllocator BumpAlloc; 239 240 /// \brief Mapping from declarations to their comments, once we have 241 /// already looked up the comment associated with a given declaration. 242 llvm::DenseMap<const Decl *, std::string> DeclComments; 243 244public: 245 const TargetInfo &Target; 246 IdentifierTable &Idents; 247 SelectorTable &Selectors; 248 Builtin::Context &BuiltinInfo; 249 DeclarationNameTable DeclarationNames; 250 llvm::OwningPtr<ExternalASTSource> ExternalSource; 251 clang::PrintingPolicy PrintingPolicy; 252 253 // Typedefs which may be provided defining the structure of Objective-C 254 // pseudo-builtins 255 QualType ObjCIdRedefinitionType; 256 QualType ObjCClassRedefinitionType; 257 QualType ObjCSelRedefinitionType; 258 259 /// \brief Source ranges for all of the comments in the source file, 260 /// sorted in order of appearance in the translation unit. 261 std::vector<SourceRange> Comments; 262 263 SourceManager& getSourceManager() { return SourceMgr; } 264 const SourceManager& getSourceManager() const { return SourceMgr; } 265 void *Allocate(unsigned Size, unsigned Align = 8) { 266 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 267 BumpAlloc.Allocate(Size, Align); 268 } 269 void Deallocate(void *Ptr) { 270 if (FreeMemory) 271 MallocAlloc.Deallocate(Ptr); 272 } 273 const LangOptions& getLangOptions() const { return LangOpts; } 274 275 FullSourceLoc getFullLoc(SourceLocation Loc) const { 276 return FullSourceLoc(Loc,SourceMgr); 277 } 278 279 /// \brief Retrieve the attributes for the given declaration. 280 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 281 282 /// \brief Erase the attributes corresponding to the given declaration. 283 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 284 285 /// \brief If this variable is an instantiated static data member of a 286 /// class template specialization, returns the templated static data member 287 /// from which it was instantiated. 288 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 289 const VarDecl *Var); 290 291 /// \brief Note that the static data member \p Inst is an instantiation of 292 /// the static data member template \p Tmpl of a class template. 293 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 294 TemplateSpecializationKind TSK); 295 296 /// \brief If the given using decl is an instantiation of a 297 /// (possibly unresolved) using decl from a template instantiation, 298 /// return it. 299 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 300 301 /// \brief Remember that the using decl \p Inst is an instantiation 302 /// of the using decl \p Pattern of a class template. 303 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 304 305 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 306 UsingShadowDecl *Pattern); 307 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 308 309 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 310 311 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 312 313 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 314 315 316 const char *getCommentForDecl(const Decl *D); 317 318 // Builtin Types. 319 CanQualType VoidTy; 320 CanQualType BoolTy; 321 CanQualType CharTy; 322 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 323 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 324 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 325 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 326 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 327 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 328 CanQualType FloatTy, DoubleTy, LongDoubleTy; 329 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 330 CanQualType VoidPtrTy, NullPtrTy; 331 CanQualType OverloadTy; 332 CanQualType DependentTy; 333 CanQualType UndeducedAutoTy; 334 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 335 336 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 337 IdentifierTable &idents, SelectorTable &sels, 338 Builtin::Context &builtins, 339 bool FreeMemory = true, unsigned size_reserve=0); 340 341 ~ASTContext(); 342 343 /// \brief Attach an external AST source to the AST context. 344 /// 345 /// The external AST source provides the ability to load parts of 346 /// the abstract syntax tree as needed from some external storage, 347 /// e.g., a precompiled header. 348 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 349 350 /// \brief Retrieve a pointer to the external AST source associated 351 /// with this AST context, if any. 352 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 353 354 void PrintStats() const; 355 const std::vector<Type*>& getTypes() const { return Types; } 356 357 //===--------------------------------------------------------------------===// 358 // Type Constructors 359 //===--------------------------------------------------------------------===// 360 361private: 362 /// getExtQualType - Return a type with extended qualifiers. 363 QualType getExtQualType(const Type *Base, Qualifiers Quals); 364 365public: 366 /// getAddSpaceQualType - Return the uniqued reference to the type for an 367 /// address space qualified type with the specified type and address space. 368 /// The resulting type has a union of the qualifiers from T and the address 369 /// space. If T already has an address space specifier, it is silently 370 /// replaced. 371 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 372 373 /// getObjCGCQualType - Returns the uniqued reference to the type for an 374 /// objc gc qualified type. The retulting type has a union of the qualifiers 375 /// from T and the gc attribute. 376 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 377 378 /// getRestrictType - Returns the uniqued reference to the type for a 379 /// 'restrict' qualified type. The resulting type has a union of the 380 /// qualifiers from T and 'restrict'. 381 QualType getRestrictType(QualType T) { 382 return T.withFastQualifiers(Qualifiers::Restrict); 383 } 384 385 /// getVolatileType - Returns the uniqued reference to the type for a 386 /// 'volatile' qualified type. The resulting type has a union of the 387 /// qualifiers from T and 'volatile'. 388 QualType getVolatileType(QualType T); 389 390 /// getConstType - Returns the uniqued reference to the type for a 391 /// 'const' qualified type. The resulting type has a union of the 392 /// qualifiers from T and 'const'. 393 /// 394 /// It can be reasonably expected that this will always be 395 /// equivalent to calling T.withConst(). 396 QualType getConstType(QualType T) { return T.withConst(); } 397 398 /// getNoReturnType - Add or remove the noreturn attribute to the given type 399 /// which must be a FunctionType or a pointer to an allowable type or a 400 /// BlockPointer. 401 QualType getNoReturnType(QualType T, bool AddNoReturn = true); 402 403 /// getComplexType - Return the uniqued reference to the type for a complex 404 /// number with the specified element type. 405 QualType getComplexType(QualType T); 406 CanQualType getComplexType(CanQualType T) { 407 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 408 } 409 410 /// getPointerType - Return the uniqued reference to the type for a pointer to 411 /// the specified type. 412 QualType getPointerType(QualType T); 413 CanQualType getPointerType(CanQualType T) { 414 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 415 } 416 417 /// getBlockPointerType - Return the uniqued reference to the type for a block 418 /// of the specified type. 419 QualType getBlockPointerType(QualType T); 420 421 /// This gets the struct used to keep track of the descriptor for pointer to 422 /// blocks. 423 QualType getBlockDescriptorType(); 424 425 // Set the type for a Block descriptor type. 426 void setBlockDescriptorType(QualType T); 427 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 428 QualType getRawBlockdescriptorType() { 429 if (BlockDescriptorType) 430 return getTagDeclType(BlockDescriptorType); 431 return QualType(); 432 } 433 434 /// This gets the struct used to keep track of the extended descriptor for 435 /// pointer to blocks. 436 QualType getBlockDescriptorExtendedType(); 437 438 // Set the type for a Block descriptor extended type. 439 void setBlockDescriptorExtendedType(QualType T); 440 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 441 /// built. 442 QualType getRawBlockdescriptorExtendedType() { 443 if (BlockDescriptorExtendedType) 444 return getTagDeclType(BlockDescriptorExtendedType); 445 return QualType(); 446 } 447 448 /// This gets the struct used to keep track of pointer to blocks, complete 449 /// with captured variables. 450 QualType getBlockParmType(bool BlockHasCopyDispose, 451 llvm::SmallVector<const Expr *, 8> &BDRDs); 452 453 /// This builds the struct used for __block variables. 454 QualType BuildByRefType(const char *DeclName, QualType Ty); 455 456 /// Returns true iff we need copy/dispose helpers for the given type. 457 bool BlockRequiresCopying(QualType Ty); 458 459 /// getLValueReferenceType - Return the uniqued reference to the type for an 460 /// lvalue reference to the specified type. 461 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 462 463 /// getRValueReferenceType - Return the uniqued reference to the type for an 464 /// rvalue reference to the specified type. 465 QualType getRValueReferenceType(QualType T); 466 467 /// getMemberPointerType - Return the uniqued reference to the type for a 468 /// member pointer to the specified type in the specified class. The class 469 /// is a Type because it could be a dependent name. 470 QualType getMemberPointerType(QualType T, const Type *Cls); 471 472 /// getVariableArrayType - Returns a non-unique reference to the type for a 473 /// variable array of the specified element type. 474 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 475 ArrayType::ArraySizeModifier ASM, 476 unsigned EltTypeQuals, 477 SourceRange Brackets); 478 479 /// getDependentSizedArrayType - Returns a non-unique reference to 480 /// the type for a dependently-sized array of the specified element 481 /// type. FIXME: We will need these to be uniqued, or at least 482 /// comparable, at some point. 483 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 484 ArrayType::ArraySizeModifier ASM, 485 unsigned EltTypeQuals, 486 SourceRange Brackets); 487 488 /// getIncompleteArrayType - Returns a unique reference to the type for a 489 /// incomplete array of the specified element type. 490 QualType getIncompleteArrayType(QualType EltTy, 491 ArrayType::ArraySizeModifier ASM, 492 unsigned EltTypeQuals); 493 494 /// getConstantArrayType - Return the unique reference to the type for a 495 /// constant array of the specified element type. 496 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 497 ArrayType::ArraySizeModifier ASM, 498 unsigned EltTypeQuals); 499 500 /// getVectorType - Return the unique reference to a vector type of 501 /// the specified element type and size. VectorType must be a built-in type. 502 QualType getVectorType(QualType VectorType, unsigned NumElts); 503 504 /// getExtVectorType - Return the unique reference to an extended vector type 505 /// of the specified element type and size. VectorType must be a built-in 506 /// type. 507 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 508 509 /// getDependentSizedExtVectorType - Returns a non-unique reference to 510 /// the type for a dependently-sized vector of the specified element 511 /// type. FIXME: We will need these to be uniqued, or at least 512 /// comparable, at some point. 513 QualType getDependentSizedExtVectorType(QualType VectorType, 514 Expr *SizeExpr, 515 SourceLocation AttrLoc); 516 517 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 518 /// 519 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false); 520 521 /// getFunctionType - Return a normal function type with a typed argument 522 /// list. isVariadic indicates whether the argument list includes '...'. 523 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 524 unsigned NumArgs, bool isVariadic, 525 unsigned TypeQuals, bool hasExceptionSpec = false, 526 bool hasAnyExceptionSpec = false, 527 unsigned NumExs = 0, const QualType *ExArray = 0, 528 bool NoReturn = false); 529 530 /// getTypeDeclType - Return the unique reference to the type for 531 /// the specified type declaration. 532 QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0); 533 534 /// getTypedefType - Return the unique reference to the type for the 535 /// specified typename decl. 536 QualType getTypedefType(TypedefDecl *Decl); 537 538 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 539 QualType Replacement); 540 541 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 542 bool ParameterPack, 543 IdentifierInfo *Name = 0); 544 545 QualType getTemplateSpecializationType(TemplateName T, 546 const TemplateArgument *Args, 547 unsigned NumArgs, 548 QualType Canon = QualType()); 549 550 QualType getTemplateSpecializationType(TemplateName T, 551 const TemplateArgumentListInfo &Args, 552 QualType Canon = QualType()); 553 554 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 555 QualType NamedType); 556 QualType getTypenameType(NestedNameSpecifier *NNS, 557 const IdentifierInfo *Name, 558 QualType Canon = QualType()); 559 QualType getTypenameType(NestedNameSpecifier *NNS, 560 const TemplateSpecializationType *TemplateId, 561 QualType Canon = QualType()); 562 QualType getElaboratedType(QualType UnderlyingType, 563 ElaboratedType::TagKind Tag); 564 565 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 566 ObjCProtocolDecl **Protocols = 0, 567 unsigned NumProtocols = 0); 568 569 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 570 /// given interface decl and the conforming protocol list. 571 QualType getObjCObjectPointerType(QualType OIT, 572 ObjCProtocolDecl **ProtocolList = 0, 573 unsigned NumProtocols = 0); 574 575 /// getTypeOfType - GCC extension. 576 QualType getTypeOfExprType(Expr *e); 577 QualType getTypeOfType(QualType t); 578 579 /// getDecltypeType - C++0x decltype. 580 QualType getDecltypeType(Expr *e); 581 582 /// getTagDeclType - Return the unique reference to the type for the 583 /// specified TagDecl (struct/union/class/enum) decl. 584 QualType getTagDeclType(const TagDecl *Decl); 585 586 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 587 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 588 CanQualType getSizeType() const; 589 590 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 591 /// returns a type compatible with the type defined in <stddef.h> as defined 592 /// by the target. 593 QualType getWCharType() const { return WCharTy; } 594 595 /// getSignedWCharType - Return the type of "signed wchar_t". 596 /// Used when in C++, as a GCC extension. 597 QualType getSignedWCharType() const; 598 599 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 600 /// Used when in C++, as a GCC extension. 601 QualType getUnsignedWCharType() const; 602 603 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 604 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 605 QualType getPointerDiffType() const; 606 607 // getCFConstantStringType - Return the C structure type used to represent 608 // constant CFStrings. 609 QualType getCFConstantStringType(); 610 611 /// Get the structure type used to representation CFStrings, or NULL 612 /// if it hasn't yet been built. 613 QualType getRawCFConstantStringType() { 614 if (CFConstantStringTypeDecl) 615 return getTagDeclType(CFConstantStringTypeDecl); 616 return QualType(); 617 } 618 void setCFConstantStringType(QualType T); 619 620 // This setter/getter represents the ObjC type for an NSConstantString. 621 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 622 QualType getObjCConstantStringInterface() const { 623 return ObjCConstantStringType; 624 } 625 626 //// This gets the struct used to keep track of fast enumerations. 627 QualType getObjCFastEnumerationStateType(); 628 629 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 630 /// been built. 631 QualType getRawObjCFastEnumerationStateType() { 632 if (ObjCFastEnumerationStateTypeDecl) 633 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 634 return QualType(); 635 } 636 637 void setObjCFastEnumerationStateType(QualType T); 638 639 /// \brief Set the type for the C FILE type. 640 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 641 642 /// \brief Retrieve the C FILE type. 643 QualType getFILEType() { 644 if (FILEDecl) 645 return getTypeDeclType(FILEDecl); 646 return QualType(); 647 } 648 649 /// \brief Set the type for the C jmp_buf type. 650 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 651 this->jmp_bufDecl = jmp_bufDecl; 652 } 653 654 /// \brief Retrieve the C jmp_buf type. 655 QualType getjmp_bufType() { 656 if (jmp_bufDecl) 657 return getTypeDeclType(jmp_bufDecl); 658 return QualType(); 659 } 660 661 /// \brief Set the type for the C sigjmp_buf type. 662 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 663 this->sigjmp_bufDecl = sigjmp_bufDecl; 664 } 665 666 /// \brief Retrieve the C sigjmp_buf type. 667 QualType getsigjmp_bufType() { 668 if (sigjmp_bufDecl) 669 return getTypeDeclType(sigjmp_bufDecl); 670 return QualType(); 671 } 672 673 /// getObjCEncodingForType - Emit the ObjC type encoding for the 674 /// given type into \arg S. If \arg NameFields is specified then 675 /// record field names are also encoded. 676 void getObjCEncodingForType(QualType t, std::string &S, 677 const FieldDecl *Field=0); 678 679 void getLegacyIntegralTypeEncoding(QualType &t) const; 680 681 // Put the string version of type qualifiers into S. 682 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 683 std::string &S) const; 684 685 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 686 /// declaration. 687 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 688 689 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 690 /// declaration. 691 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 692 693 /// getObjCEncodingForPropertyDecl - Return the encoded type for 694 /// this method declaration. If non-NULL, Container must be either 695 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 696 /// only be NULL when getting encodings for protocol properties. 697 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 698 const Decl *Container, 699 std::string &S); 700 701 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 702 ObjCProtocolDecl *rProto); 703 704 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 705 /// purpose. 706 int getObjCEncodingTypeSize(QualType t); 707 708 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 709 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 710 QualType getObjCIdType() const { return ObjCIdTypedefType; } 711 void setObjCIdType(QualType T); 712 713 void setObjCSelType(QualType T); 714 QualType getObjCSelType() const { return ObjCSelTypedefType; } 715 716 void setObjCProtoType(QualType QT); 717 QualType getObjCProtoType() const { return ObjCProtoType; } 718 719 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 720 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 721 /// struct. 722 QualType getObjCClassType() const { return ObjCClassTypedefType; } 723 void setObjCClassType(QualType T); 724 725 void setBuiltinVaListType(QualType T); 726 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 727 728 QualType getFixedWidthIntType(unsigned Width, bool Signed); 729 730 /// getCVRQualifiedType - Returns a type with additional const, 731 /// volatile, or restrict qualifiers. 732 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 733 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 734 } 735 736 /// getQualifiedType - Returns a type with additional qualifiers. 737 QualType getQualifiedType(QualType T, Qualifiers Qs) { 738 if (!Qs.hasNonFastQualifiers()) 739 return T.withFastQualifiers(Qs.getFastQualifiers()); 740 QualifierCollector Qc(Qs); 741 const Type *Ptr = Qc.strip(T); 742 return getExtQualType(Ptr, Qc); 743 } 744 745 /// getQualifiedType - Returns a type with additional qualifiers. 746 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 747 if (!Qs.hasNonFastQualifiers()) 748 return QualType(T, Qs.getFastQualifiers()); 749 return getExtQualType(T, Qs); 750 } 751 752 DeclarationName getNameForTemplate(TemplateName Name); 753 754 TemplateName getOverloadedTemplateName(NamedDecl * const *Begin, 755 NamedDecl * const *End); 756 757 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 758 bool TemplateKeyword, 759 TemplateDecl *Template); 760 761 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 762 const IdentifierInfo *Name); 763 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 764 OverloadedOperatorKind Operator); 765 766 enum GetBuiltinTypeError { 767 GE_None, //< No error 768 GE_Missing_stdio, //< Missing a type from <stdio.h> 769 GE_Missing_setjmp //< Missing a type from <setjmp.h> 770 }; 771 772 /// GetBuiltinType - Return the type for the specified builtin. 773 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 774 775private: 776 CanQualType getFromTargetType(unsigned Type) const; 777 778 //===--------------------------------------------------------------------===// 779 // Type Predicates. 780 //===--------------------------------------------------------------------===// 781 782public: 783 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 784 /// garbage collection attribute. 785 /// 786 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 787 788 /// isObjCNSObjectType - Return true if this is an NSObject object with 789 /// its NSObject attribute set. 790 bool isObjCNSObjectType(QualType Ty) const; 791 792 //===--------------------------------------------------------------------===// 793 // Type Sizing and Analysis 794 //===--------------------------------------------------------------------===// 795 796 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 797 /// scalar floating point type. 798 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 799 800 /// getTypeInfo - Get the size and alignment of the specified complete type in 801 /// bits. 802 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 803 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 804 return getTypeInfo(T.getTypePtr()); 805 } 806 807 /// getTypeSize - Return the size of the specified type, in bits. This method 808 /// does not work on incomplete types. 809 uint64_t getTypeSize(QualType T) { 810 return getTypeInfo(T).first; 811 } 812 uint64_t getTypeSize(const Type *T) { 813 return getTypeInfo(T).first; 814 } 815 816 /// getCharWidth - Return the size of the character type, in bits 817 uint64_t getCharWidth() { 818 return getTypeSize(CharTy); 819 } 820 821 /// getTypeSizeInChars - Return the size of the specified type, in characters. 822 /// This method does not work on incomplete types. 823 CharUnits getTypeSizeInChars(QualType T) { 824 return CharUnits::fromRaw(getTypeSize(T) / getCharWidth()); 825 } 826 CharUnits getTypeSizeInChars(const Type *T) { 827 return CharUnits::fromRaw(getTypeSize(T) / getCharWidth()); 828 } 829 830 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 831 /// This method does not work on incomplete types. 832 unsigned getTypeAlign(QualType T) { 833 return getTypeInfo(T).second; 834 } 835 unsigned getTypeAlign(const Type *T) { 836 return getTypeInfo(T).second; 837 } 838 839 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 840 /// type for the current target in bits. This can be different than the ABI 841 /// alignment in cases where it is beneficial for performance to overalign 842 /// a data type. 843 unsigned getPreferredTypeAlign(const Type *T); 844 845 unsigned getDeclAlignInBytes(const Decl *D, bool RefAsPointee = false); 846 847 /// getASTRecordLayout - Get or compute information about the layout of the 848 /// specified record (struct/union/class), which indicates its size and field 849 /// position information. 850 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 851 852 /// getASTObjCInterfaceLayout - Get or compute information about the 853 /// layout of the specified Objective-C interface. 854 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 855 856 /// getASTObjCImplementationLayout - Get or compute information about 857 /// the layout of the specified Objective-C implementation. This may 858 /// differ from the interface if synthesized ivars are present. 859 const ASTRecordLayout & 860 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 861 862 /// getKeyFunction - Get the key function for the given record decl. 863 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 864 /// 865 /// ...the first non-pure virtual function that is not inline at the point 866 /// of class definition. 867 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 868 869 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 870 llvm::SmallVectorImpl<FieldDecl*> &Fields); 871 872 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 873 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 874 bool CollectSynthesized = true); 875 void CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 876 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 877 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 878 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 879 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 880 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 881 void CollectInheritedProtocols(const Decl *CDecl, 882 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols); 883 884 //===--------------------------------------------------------------------===// 885 // Type Operators 886 //===--------------------------------------------------------------------===// 887 888 /// getCanonicalType - Return the canonical (structural) type corresponding to 889 /// the specified potentially non-canonical type. The non-canonical version 890 /// of a type may have many "decorated" versions of types. Decorators can 891 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 892 /// to be free of any of these, allowing two canonical types to be compared 893 /// for exact equality with a simple pointer comparison. 894 CanQualType getCanonicalType(QualType T); 895 const Type *getCanonicalType(const Type *T) { 896 return T->getCanonicalTypeInternal().getTypePtr(); 897 } 898 899 /// getCanonicalParamType - Return the canonical parameter type 900 /// corresponding to the specific potentially non-canonical one. 901 /// Qualifiers are stripped off, functions are turned into function 902 /// pointers, and arrays decay one level into pointers. 903 CanQualType getCanonicalParamType(QualType T); 904 905 /// \brief Determine whether the given types are equivalent. 906 bool hasSameType(QualType T1, QualType T2) { 907 return getCanonicalType(T1) == getCanonicalType(T2); 908 } 909 910 /// \brief Determine whether the given types are equivalent after 911 /// cvr-qualifiers have been removed. 912 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 913 CanQualType CT1 = getCanonicalType(T1); 914 CanQualType CT2 = getCanonicalType(T2); 915 return CT1.getUnqualifiedType() == CT2.getUnqualifiedType(); 916 } 917 918 /// \brief Retrieves the "canonical" declaration of 919 920 /// \brief Retrieves the "canonical" nested name specifier for a 921 /// given nested name specifier. 922 /// 923 /// The canonical nested name specifier is a nested name specifier 924 /// that uniquely identifies a type or namespace within the type 925 /// system. For example, given: 926 /// 927 /// \code 928 /// namespace N { 929 /// struct S { 930 /// template<typename T> struct X { typename T* type; }; 931 /// }; 932 /// } 933 /// 934 /// template<typename T> struct Y { 935 /// typename N::S::X<T>::type member; 936 /// }; 937 /// \endcode 938 /// 939 /// Here, the nested-name-specifier for N::S::X<T>:: will be 940 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 941 /// by declarations in the type system and the canonical type for 942 /// the template type parameter 'T' is template-param-0-0. 943 NestedNameSpecifier * 944 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 945 946 /// \brief Retrieves the "canonical" template name that refers to a 947 /// given template. 948 /// 949 /// The canonical template name is the simplest expression that can 950 /// be used to refer to a given template. For most templates, this 951 /// expression is just the template declaration itself. For example, 952 /// the template std::vector can be referred to via a variety of 953 /// names---std::vector, ::std::vector, vector (if vector is in 954 /// scope), etc.---but all of these names map down to the same 955 /// TemplateDecl, which is used to form the canonical template name. 956 /// 957 /// Dependent template names are more interesting. Here, the 958 /// template name could be something like T::template apply or 959 /// std::allocator<T>::template rebind, where the nested name 960 /// specifier itself is dependent. In this case, the canonical 961 /// template name uses the shortest form of the dependent 962 /// nested-name-specifier, which itself contains all canonical 963 /// types, values, and templates. 964 TemplateName getCanonicalTemplateName(TemplateName Name); 965 966 /// \brief Determine whether the given template names refer to the same 967 /// template. 968 bool hasSameTemplateName(TemplateName X, TemplateName Y); 969 970 /// \brief Retrieve the "canonical" template argument. 971 /// 972 /// The canonical template argument is the simplest template argument 973 /// (which may be a type, value, expression, or declaration) that 974 /// expresses the value of the argument. 975 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 976 977 /// Type Query functions. If the type is an instance of the specified class, 978 /// return the Type pointer for the underlying maximally pretty type. This 979 /// is a member of ASTContext because this may need to do some amount of 980 /// canonicalization, e.g. to move type qualifiers into the element type. 981 const ArrayType *getAsArrayType(QualType T); 982 const ConstantArrayType *getAsConstantArrayType(QualType T) { 983 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 984 } 985 const VariableArrayType *getAsVariableArrayType(QualType T) { 986 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 987 } 988 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 989 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 990 } 991 992 /// getBaseElementType - Returns the innermost element type of an array type. 993 /// For example, will return "int" for int[m][n] 994 QualType getBaseElementType(const ArrayType *VAT); 995 996 /// getBaseElementType - Returns the innermost element type of a type 997 /// (which needn't actually be an array type). 998 QualType getBaseElementType(QualType QT); 999 1000 /// getConstantArrayElementCount - Returns number of constant array elements. 1001 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1002 1003 /// getArrayDecayedType - Return the properly qualified result of decaying the 1004 /// specified array type to a pointer. This operation is non-trivial when 1005 /// handling typedefs etc. The canonical type of "T" must be an array type, 1006 /// this returns a pointer to a properly qualified element of the array. 1007 /// 1008 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1009 QualType getArrayDecayedType(QualType T); 1010 1011 /// getPromotedIntegerType - Returns the type that Promotable will 1012 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1013 /// integer type. 1014 QualType getPromotedIntegerType(QualType PromotableType); 1015 1016 /// \brief Whether this is a promotable bitfield reference according 1017 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1018 /// 1019 /// \returns the type this bit-field will promote to, or NULL if no 1020 /// promotion occurs. 1021 QualType isPromotableBitField(Expr *E); 1022 1023 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1024 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1025 /// LHS < RHS, return -1. 1026 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1027 1028 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1029 /// point types, ignoring the domain of the type (i.e. 'double' == 1030 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1031 /// LHS < RHS, return -1. 1032 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1033 1034 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1035 /// point or a complex type (based on typeDomain/typeSize). 1036 /// 'typeDomain' is a real floating point or complex type. 1037 /// 'typeSize' is a real floating point or complex type. 1038 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1039 QualType typeDomain) const; 1040 1041private: 1042 // Helper for integer ordering 1043 unsigned getIntegerRank(Type* T); 1044 1045public: 1046 1047 //===--------------------------------------------------------------------===// 1048 // Type Compatibility Predicates 1049 //===--------------------------------------------------------------------===// 1050 1051 /// Compatibility predicates used to check assignment expressions. 1052 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1053 1054 bool isObjCIdType(QualType T) const { 1055 return T == ObjCIdTypedefType; 1056 } 1057 bool isObjCClassType(QualType T) const { 1058 return T == ObjCClassTypedefType; 1059 } 1060 bool isObjCSelType(QualType T) const { 1061 return T == ObjCSelTypedefType; 1062 } 1063 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1064 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1065 bool ForCompare); 1066 1067 // Check the safety of assignment from LHS to RHS 1068 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1069 const ObjCObjectPointerType *RHSOPT); 1070 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1071 const ObjCInterfaceType *RHS); 1072 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1073 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1074 const ObjCObjectPointerType *RHSOPT); 1075 1076 // Functions for calculating composite types 1077 QualType mergeTypes(QualType, QualType); 1078 QualType mergeFunctionTypes(QualType, QualType); 1079 1080 /// UsualArithmeticConversionsType - handles the various conversions 1081 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1082 /// and returns the result type of that conversion. 1083 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1084 1085 //===--------------------------------------------------------------------===// 1086 // Integer Predicates 1087 //===--------------------------------------------------------------------===// 1088 1089 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1090 // of bits in an integer type excluding any padding bits. 1091 unsigned getIntWidth(QualType T); 1092 1093 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1094 // unsigned integer type. This method takes a signed type, and returns the 1095 // corresponding unsigned integer type. 1096 QualType getCorrespondingUnsignedType(QualType T); 1097 1098 //===--------------------------------------------------------------------===// 1099 // Type Iterators. 1100 //===--------------------------------------------------------------------===// 1101 1102 typedef std::vector<Type*>::iterator type_iterator; 1103 typedef std::vector<Type*>::const_iterator const_type_iterator; 1104 1105 type_iterator types_begin() { return Types.begin(); } 1106 type_iterator types_end() { return Types.end(); } 1107 const_type_iterator types_begin() const { return Types.begin(); } 1108 const_type_iterator types_end() const { return Types.end(); } 1109 1110 //===--------------------------------------------------------------------===// 1111 // Integer Values 1112 //===--------------------------------------------------------------------===// 1113 1114 /// MakeIntValue - Make an APSInt of the appropriate width and 1115 /// signedness for the given \arg Value and integer \arg Type. 1116 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1117 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1118 Res = Value; 1119 return Res; 1120 } 1121 1122 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1123 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1124 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1125 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1126 1127 /// \brief Set the implementation of ObjCInterfaceDecl. 1128 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1129 ObjCImplementationDecl *ImplD); 1130 /// \brief Set the implementation of ObjCCategoryDecl. 1131 void setObjCImplementation(ObjCCategoryDecl *CatD, 1132 ObjCCategoryImplDecl *ImplD); 1133 1134 /// \brief Allocate an uninitialized TypeSourceInfo. 1135 /// 1136 /// The caller should initialize the memory held by TypeSourceInfo using 1137 /// the TypeLoc wrappers. 1138 /// 1139 /// \param T the type that will be the basis for type source info. This type 1140 /// should refer to how the declarator was written in source code, not to 1141 /// what type semantic analysis resolved the declarator to. 1142 /// 1143 /// \param Size the size of the type info to create, or 0 if the size 1144 /// should be calculated based on the type. 1145 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0); 1146 1147 /// \brief Allocate a TypeSourceInfo where all locations have been 1148 /// initialized to a given location, which defaults to the empty 1149 /// location. 1150 TypeSourceInfo * 1151 getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation()); 1152 1153private: 1154 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1155 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1156 1157 void InitBuiltinTypes(); 1158 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1159 1160 // Return the ObjC type encoding for a given type. 1161 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1162 bool ExpandPointedToStructures, 1163 bool ExpandStructures, 1164 const FieldDecl *Field, 1165 bool OutermostType = false, 1166 bool EncodingProperty = false); 1167 1168 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1169 const ObjCImplementationDecl *Impl); 1170}; 1171 1172/// @brief Utility function for constructing a nullary selector. 1173static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1174 IdentifierInfo* II = &Ctx.Idents.get(name); 1175 return Ctx.Selectors.getSelector(0, &II); 1176} 1177 1178/// @brief Utility function for constructing an unary selector. 1179static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1180 IdentifierInfo* II = &Ctx.Idents.get(name); 1181 return Ctx.Selectors.getSelector(1, &II); 1182} 1183 1184} // end namespace clang 1185 1186// operator new and delete aren't allowed inside namespaces. 1187// The throw specifications are mandated by the standard. 1188/// @brief Placement new for using the ASTContext's allocator. 1189/// 1190/// This placement form of operator new uses the ASTContext's allocator for 1191/// obtaining memory. It is a non-throwing new, which means that it returns 1192/// null on error. (If that is what the allocator does. The current does, so if 1193/// this ever changes, this operator will have to be changed, too.) 1194/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1195/// @code 1196/// // Default alignment (16) 1197/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1198/// // Specific alignment 1199/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1200/// @endcode 1201/// Please note that you cannot use delete on the pointer; it must be 1202/// deallocated using an explicit destructor call followed by 1203/// @c Context.Deallocate(Ptr). 1204/// 1205/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1206/// @param C The ASTContext that provides the allocator. 1207/// @param Alignment The alignment of the allocated memory (if the underlying 1208/// allocator supports it). 1209/// @return The allocated memory. Could be NULL. 1210inline void *operator new(size_t Bytes, clang::ASTContext &C, 1211 size_t Alignment) throw () { 1212 return C.Allocate(Bytes, Alignment); 1213} 1214/// @brief Placement delete companion to the new above. 1215/// 1216/// This operator is just a companion to the new above. There is no way of 1217/// invoking it directly; see the new operator for more details. This operator 1218/// is called implicitly by the compiler if a placement new expression using 1219/// the ASTContext throws in the object constructor. 1220inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1221 throw () { 1222 C.Deallocate(Ptr); 1223} 1224 1225/// This placement form of operator new[] uses the ASTContext's allocator for 1226/// obtaining memory. It is a non-throwing new[], which means that it returns 1227/// null on error. 1228/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1229/// @code 1230/// // Default alignment (16) 1231/// char *data = new (Context) char[10]; 1232/// // Specific alignment 1233/// char *data = new (Context, 8) char[10]; 1234/// @endcode 1235/// Please note that you cannot use delete on the pointer; it must be 1236/// deallocated using an explicit destructor call followed by 1237/// @c Context.Deallocate(Ptr). 1238/// 1239/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1240/// @param C The ASTContext that provides the allocator. 1241/// @param Alignment The alignment of the allocated memory (if the underlying 1242/// allocator supports it). 1243/// @return The allocated memory. Could be NULL. 1244inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1245 size_t Alignment = 16) throw () { 1246 return C.Allocate(Bytes, Alignment); 1247} 1248 1249/// @brief Placement delete[] companion to the new[] above. 1250/// 1251/// This operator is just a companion to the new[] above. There is no way of 1252/// invoking it directly; see the new[] operator for more details. This operator 1253/// is called implicitly by the compiler if a placement new[] expression using 1254/// the ASTContext throws in the object constructor. 1255inline void operator delete[](void *Ptr, clang::ASTContext &C) throw () { 1256 C.Deallocate(Ptr); 1257} 1258 1259#endif 1260