ASTContext.h revision e4687ef4b9c72e1c476fce27d0abc1a2f78f739c
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/ADT/SmallPtrSet.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 CharUnits; 43 class Expr; 44 class ExternalASTSource; 45 class IdentifierTable; 46 class SelectorTable; 47 class SourceManager; 48 class TargetInfo; 49 // Decls 50 class DeclContext; 51 class CXXMethodDecl; 52 class CXXRecordDecl; 53 class Decl; 54 class FieldDecl; 55 class ObjCIvarDecl; 56 class ObjCIvarRefExpr; 57 class ObjCPropertyDecl; 58 class RecordDecl; 59 class TagDecl; 60 class TemplateTypeParmDecl; 61 class TranslationUnitDecl; 62 class TypeDecl; 63 class TypedefDecl; 64 class UsingDecl; 65 class UsingShadowDecl; 66 class UnresolvedSetIterator; 67 68 namespace Builtin { class Context; } 69 70/// \brief A vector of C++ member functions that is optimized for 71/// storing a single method. 72class CXXMethodVector { 73 /// \brief Storage for the vector. 74 /// 75 /// When the low bit is zero, this is a const CXXMethodDecl *. When the 76 /// low bit is one, this is a std::vector<const CXXMethodDecl *> *. 77 mutable uintptr_t Storage; 78 79 typedef std::vector<const CXXMethodDecl *> vector_type; 80 81public: 82 CXXMethodVector() : Storage(0) { } 83 84 typedef const CXXMethodDecl **iterator; 85 iterator begin() const; 86 iterator end() const; 87 88 void push_back(const CXXMethodDecl *Method); 89 void Destroy(); 90}; 91 92/// ASTContext - This class holds long-lived AST nodes (such as types and 93/// decls) that can be referred to throughout the semantic analysis of a file. 94class ASTContext { 95 std::vector<Type*> Types; 96 llvm::FoldingSet<ExtQuals> ExtQualNodes; 97 llvm::FoldingSet<ComplexType> ComplexTypes; 98 llvm::FoldingSet<PointerType> PointerTypes; 99 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 100 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 101 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 102 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 103 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 104 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 105 std::vector<VariableArrayType*> VariableArrayTypes; 106 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 107 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 108 llvm::FoldingSet<VectorType> VectorTypes; 109 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 110 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 111 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 112 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 113 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 114 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 115 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 116 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 117 llvm::FoldingSet<TypenameType> TypenameTypes; 118 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 119 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 120 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 121 122 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 123 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 124 125 /// \brief The set of nested name specifiers. 126 /// 127 /// This set is managed by the NestedNameSpecifier class. 128 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 129 NestedNameSpecifier *GlobalNestedNameSpecifier; 130 friend class NestedNameSpecifier; 131 132 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 133 /// This is lazily created. This is intentionally not serialized. 134 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 135 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 136 137 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 138 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 139 140 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 141 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 142 143 /// BuiltinVaListType - built-in va list type. 144 /// This is initially null and set by Sema::LazilyCreateBuiltin when 145 /// a builtin that takes a valist is encountered. 146 QualType BuiltinVaListType; 147 148 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 149 QualType ObjCIdTypedefType; 150 151 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 152 QualType ObjCSelTypedefType; 153 154 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 155 QualType ObjCProtoType; 156 const RecordType *ProtoStructType; 157 158 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 159 QualType ObjCClassTypedefType; 160 161 QualType ObjCConstantStringType; 162 RecordDecl *CFConstantStringTypeDecl; 163 164 RecordDecl *ObjCFastEnumerationStateTypeDecl; 165 166 /// \brief The type for the C FILE type. 167 TypeDecl *FILEDecl; 168 169 /// \brief The type for the C jmp_buf type. 170 TypeDecl *jmp_bufDecl; 171 172 /// \brief The type for the C sigjmp_buf type. 173 TypeDecl *sigjmp_bufDecl; 174 175 /// \brief Type for the Block descriptor for Blocks CodeGen. 176 RecordDecl *BlockDescriptorType; 177 178 /// \brief Type for the Block descriptor for Blocks CodeGen. 179 RecordDecl *BlockDescriptorExtendedType; 180 181 /// \brief Keeps track of all declaration attributes. 182 /// 183 /// Since so few decls have attrs, we keep them in a hash map instead of 184 /// wasting space in the Decl class. 185 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 186 187 /// \brief Keeps track of the static data member templates from which 188 /// static data members of class template specializations were instantiated. 189 /// 190 /// This data structure stores the mapping from instantiations of static 191 /// data members to the static data member representations within the 192 /// class template from which they were instantiated along with the kind 193 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 194 /// 195 /// Given the following example: 196 /// 197 /// \code 198 /// template<typename T> 199 /// struct X { 200 /// static T value; 201 /// }; 202 /// 203 /// template<typename T> 204 /// T X<T>::value = T(17); 205 /// 206 /// int *x = &X<int>::value; 207 /// \endcode 208 /// 209 /// This mapping will contain an entry that maps from the VarDecl for 210 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 211 /// class template X) and will be marked TSK_ImplicitInstantiation. 212 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 213 InstantiatedFromStaticDataMember; 214 215 /// \brief Keeps track of the declaration from which a UsingDecl was 216 /// created during instantiation. The source declaration is always 217 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 218 /// UnresolvedUsingTypenameDecl. 219 /// 220 /// For example: 221 /// \code 222 /// template<typename T> 223 /// struct A { 224 /// void f(); 225 /// }; 226 /// 227 /// template<typename T> 228 /// struct B : A<T> { 229 /// using A<T>::f; 230 /// }; 231 /// 232 /// template struct B<int>; 233 /// \endcode 234 /// 235 /// This mapping will contain an entry that maps from the UsingDecl in 236 /// B<int> to the UnresolvedUsingDecl in B<T>. 237 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 238 239 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 240 InstantiatedFromUsingShadowDecl; 241 242 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 243 244 /// \brief Mapping that stores the methods overridden by a given C++ 245 /// member function. 246 /// 247 /// Since most C++ member functions aren't virtual and therefore 248 /// don't override anything, we store the overridden functions in 249 /// this map on the side rather than within the CXXMethodDecl structure. 250 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 251 252 TranslationUnitDecl *TUDecl; 253 254 /// SourceMgr - The associated SourceManager object. 255 SourceManager &SourceMgr; 256 257 /// LangOpts - The language options used to create the AST associated with 258 /// this ASTContext object. 259 LangOptions LangOpts; 260 261 /// \brief Whether we have already loaded comment source ranges from an 262 /// external source. 263 bool LoadedExternalComments; 264 265 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 266 bool FreeMemory; 267 llvm::MallocAllocator MallocAlloc; 268 llvm::BumpPtrAllocator BumpAlloc; 269 270 /// \brief Mapping from declarations to their comments, once we have 271 /// already looked up the comment associated with a given declaration. 272 llvm::DenseMap<const Decl *, std::string> DeclComments; 273 274public: 275 const TargetInfo &Target; 276 IdentifierTable &Idents; 277 SelectorTable &Selectors; 278 Builtin::Context &BuiltinInfo; 279 DeclarationNameTable DeclarationNames; 280 llvm::OwningPtr<ExternalASTSource> ExternalSource; 281 clang::PrintingPolicy PrintingPolicy; 282 283 // Typedefs which may be provided defining the structure of Objective-C 284 // pseudo-builtins 285 QualType ObjCIdRedefinitionType; 286 QualType ObjCClassRedefinitionType; 287 QualType ObjCSelRedefinitionType; 288 289 /// \brief Source ranges for all of the comments in the source file, 290 /// sorted in order of appearance in the translation unit. 291 std::vector<SourceRange> Comments; 292 293 SourceManager& getSourceManager() { return SourceMgr; } 294 const SourceManager& getSourceManager() const { return SourceMgr; } 295 void *Allocate(unsigned Size, unsigned Align = 8) { 296 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 297 BumpAlloc.Allocate(Size, Align); 298 } 299 void Deallocate(void *Ptr) { 300 if (FreeMemory) 301 MallocAlloc.Deallocate(Ptr); 302 } 303 const LangOptions& getLangOptions() const { return LangOpts; } 304 305 FullSourceLoc getFullLoc(SourceLocation Loc) const { 306 return FullSourceLoc(Loc,SourceMgr); 307 } 308 309 /// \brief Retrieve the attributes for the given declaration. 310 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 311 312 /// \brief Erase the attributes corresponding to the given declaration. 313 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 314 315 /// \brief If this variable is an instantiated static data member of a 316 /// class template specialization, returns the templated static data member 317 /// from which it was instantiated. 318 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 319 const VarDecl *Var); 320 321 /// \brief Note that the static data member \p Inst is an instantiation of 322 /// the static data member template \p Tmpl of a class template. 323 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 324 TemplateSpecializationKind TSK); 325 326 /// \brief If the given using decl is an instantiation of a 327 /// (possibly unresolved) using decl from a template instantiation, 328 /// return it. 329 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 330 331 /// \brief Remember that the using decl \p Inst is an instantiation 332 /// of the using decl \p Pattern of a class template. 333 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 334 335 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 336 UsingShadowDecl *Pattern); 337 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 338 339 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 340 341 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 342 343 // Access to the set of methods overridden by the given C++ method. 344 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 345 overridden_cxx_method_iterator 346 overridden_methods_begin(const CXXMethodDecl *Method) const; 347 348 overridden_cxx_method_iterator 349 overridden_methods_end(const CXXMethodDecl *Method) const; 350 351 /// \brief Note that the given C++ \p Method overrides the given \p 352 /// Overridden method. 353 void addOverriddenMethod(const CXXMethodDecl *Method, 354 const CXXMethodDecl *Overridden); 355 356 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 357 358 359 const char *getCommentForDecl(const Decl *D); 360 361 // Builtin Types. 362 CanQualType VoidTy; 363 CanQualType BoolTy; 364 CanQualType CharTy; 365 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 366 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 367 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 368 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 369 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 370 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 371 CanQualType FloatTy, DoubleTy, LongDoubleTy; 372 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 373 CanQualType VoidPtrTy, NullPtrTy; 374 CanQualType OverloadTy; 375 CanQualType DependentTy; 376 CanQualType UndeducedAutoTy; 377 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 378 379 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 380 IdentifierTable &idents, SelectorTable &sels, 381 Builtin::Context &builtins, 382 bool FreeMemory = true, unsigned size_reserve=0); 383 384 ~ASTContext(); 385 386 /// \brief Attach an external AST source to the AST context. 387 /// 388 /// The external AST source provides the ability to load parts of 389 /// the abstract syntax tree as needed from some external storage, 390 /// e.g., a precompiled header. 391 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 392 393 /// \brief Retrieve a pointer to the external AST source associated 394 /// with this AST context, if any. 395 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 396 397 void PrintStats() const; 398 const std::vector<Type*>& getTypes() const { return Types; } 399 400 //===--------------------------------------------------------------------===// 401 // Type Constructors 402 //===--------------------------------------------------------------------===// 403 404private: 405 /// getExtQualType - Return a type with extended qualifiers. 406 QualType getExtQualType(const Type *Base, Qualifiers Quals); 407 408public: 409 /// getAddSpaceQualType - Return the uniqued reference to the type for an 410 /// address space qualified type with the specified type and address space. 411 /// The resulting type has a union of the qualifiers from T and the address 412 /// space. If T already has an address space specifier, it is silently 413 /// replaced. 414 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 415 416 /// getObjCGCQualType - Returns the uniqued reference to the type for an 417 /// objc gc qualified type. The retulting type has a union of the qualifiers 418 /// from T and the gc attribute. 419 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 420 421 /// getRestrictType - Returns the uniqued reference to the type for a 422 /// 'restrict' qualified type. The resulting type has a union of the 423 /// qualifiers from T and 'restrict'. 424 QualType getRestrictType(QualType T) { 425 return T.withFastQualifiers(Qualifiers::Restrict); 426 } 427 428 /// getVolatileType - Returns the uniqued reference to the type for a 429 /// 'volatile' qualified type. The resulting type has a union of the 430 /// qualifiers from T and 'volatile'. 431 QualType getVolatileType(QualType T); 432 433 /// getConstType - Returns the uniqued reference to the type for a 434 /// 'const' qualified type. The resulting type has a union of the 435 /// qualifiers from T and 'const'. 436 /// 437 /// It can be reasonably expected that this will always be 438 /// equivalent to calling T.withConst(). 439 QualType getConstType(QualType T) { return T.withConst(); } 440 441 /// getNoReturnType - Add or remove the noreturn attribute to the given type 442 /// which must be a FunctionType or a pointer to an allowable type or a 443 /// BlockPointer. 444 QualType getNoReturnType(QualType T, bool AddNoReturn = true); 445 446 /// getCallConvType - Adds the specified calling convention attribute to 447 /// the given type, which must be a FunctionType or a pointer to an 448 /// allowable type. 449 QualType getCallConvType(QualType T, CallingConv CallConv); 450 451 /// getComplexType - Return the uniqued reference to the type for a complex 452 /// number with the specified element type. 453 QualType getComplexType(QualType T); 454 CanQualType getComplexType(CanQualType T) { 455 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 456 } 457 458 /// getPointerType - Return the uniqued reference to the type for a pointer to 459 /// the specified type. 460 QualType getPointerType(QualType T); 461 CanQualType getPointerType(CanQualType T) { 462 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 463 } 464 465 /// getBlockPointerType - Return the uniqued reference to the type for a block 466 /// of the specified type. 467 QualType getBlockPointerType(QualType T); 468 469 /// This gets the struct used to keep track of the descriptor for pointer to 470 /// blocks. 471 QualType getBlockDescriptorType(); 472 473 // Set the type for a Block descriptor type. 474 void setBlockDescriptorType(QualType T); 475 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 476 QualType getRawBlockdescriptorType() { 477 if (BlockDescriptorType) 478 return getTagDeclType(BlockDescriptorType); 479 return QualType(); 480 } 481 482 /// This gets the struct used to keep track of the extended descriptor for 483 /// pointer to blocks. 484 QualType getBlockDescriptorExtendedType(); 485 486 // Set the type for a Block descriptor extended type. 487 void setBlockDescriptorExtendedType(QualType T); 488 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 489 /// built. 490 QualType getRawBlockdescriptorExtendedType() { 491 if (BlockDescriptorExtendedType) 492 return getTagDeclType(BlockDescriptorExtendedType); 493 return QualType(); 494 } 495 496 /// This gets the struct used to keep track of pointer to blocks, complete 497 /// with captured variables. 498 QualType getBlockParmType(bool BlockHasCopyDispose, 499 llvm::SmallVector<const Expr *, 8> &BDRDs); 500 501 /// This builds the struct used for __block variables. 502 QualType BuildByRefType(const char *DeclName, QualType Ty); 503 504 /// Returns true iff we need copy/dispose helpers for the given type. 505 bool BlockRequiresCopying(QualType Ty); 506 507 /// getLValueReferenceType - Return the uniqued reference to the type for an 508 /// lvalue reference to the specified type. 509 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 510 511 /// getRValueReferenceType - Return the uniqued reference to the type for an 512 /// rvalue reference to the specified type. 513 QualType getRValueReferenceType(QualType T); 514 515 /// getMemberPointerType - Return the uniqued reference to the type for a 516 /// member pointer to the specified type in the specified class. The class 517 /// is a Type because it could be a dependent name. 518 QualType getMemberPointerType(QualType T, const Type *Cls); 519 520 /// getVariableArrayType - Returns a non-unique reference to the type for a 521 /// variable array of the specified element type. 522 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 523 ArrayType::ArraySizeModifier ASM, 524 unsigned EltTypeQuals, 525 SourceRange Brackets); 526 527 /// getDependentSizedArrayType - Returns a non-unique reference to 528 /// the type for a dependently-sized array of the specified element 529 /// type. FIXME: We will need these to be uniqued, or at least 530 /// comparable, at some point. 531 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 532 ArrayType::ArraySizeModifier ASM, 533 unsigned EltTypeQuals, 534 SourceRange Brackets); 535 536 /// getIncompleteArrayType - Returns a unique reference to the type for a 537 /// incomplete array of the specified element type. 538 QualType getIncompleteArrayType(QualType EltTy, 539 ArrayType::ArraySizeModifier ASM, 540 unsigned EltTypeQuals); 541 542 /// getConstantArrayType - Return the unique reference to the type for a 543 /// constant array of the specified element type. 544 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 545 ArrayType::ArraySizeModifier ASM, 546 unsigned EltTypeQuals); 547 548 /// getVectorType - Return the unique reference to a vector type of 549 /// the specified element type and size. VectorType must be a built-in type. 550 QualType getVectorType(QualType VectorType, unsigned NumElts, 551 bool AltiVec, bool IsPixel); 552 553 /// getExtVectorType - Return the unique reference to an extended vector type 554 /// of the specified element type and size. VectorType must be a built-in 555 /// type. 556 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 557 558 /// getDependentSizedExtVectorType - Returns a non-unique reference to 559 /// the type for a dependently-sized vector of the specified element 560 /// type. FIXME: We will need these to be uniqued, or at least 561 /// comparable, at some point. 562 QualType getDependentSizedExtVectorType(QualType VectorType, 563 Expr *SizeExpr, 564 SourceLocation AttrLoc); 565 566 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 567 /// 568 QualType getFunctionNoProtoType(QualType ResultTy, bool NoReturn = false, 569 CallingConv CallConv = CC_Default); 570 571 /// getFunctionType - Return a normal function type with a typed argument 572 /// list. isVariadic indicates whether the argument list includes '...'. 573 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 574 unsigned NumArgs, bool isVariadic, 575 unsigned TypeQuals, bool hasExceptionSpec, 576 bool hasAnyExceptionSpec, 577 unsigned NumExs, const QualType *ExArray, 578 bool NoReturn, 579 CallingConv CallConv); 580 581 /// getTypeDeclType - Return the unique reference to the type for 582 /// the specified type declaration. 583 QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl* PrevDecl=0); 584 585 /// getTypedefType - Return the unique reference to the type for the 586 /// specified typename decl. 587 QualType getTypedefType(const TypedefDecl *Decl); 588 589 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 590 QualType Replacement); 591 592 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 593 bool ParameterPack, 594 IdentifierInfo *Name = 0); 595 596 QualType getTemplateSpecializationType(TemplateName T, 597 const TemplateArgument *Args, 598 unsigned NumArgs, 599 QualType Canon = QualType()); 600 601 QualType getTemplateSpecializationType(TemplateName T, 602 const TemplateArgumentListInfo &Args, 603 QualType Canon = QualType()); 604 605 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 606 QualType NamedType); 607 QualType getTypenameType(NestedNameSpecifier *NNS, 608 const IdentifierInfo *Name, 609 QualType Canon = QualType()); 610 QualType getTypenameType(NestedNameSpecifier *NNS, 611 const TemplateSpecializationType *TemplateId, 612 QualType Canon = QualType()); 613 QualType getElaboratedType(QualType UnderlyingType, 614 ElaboratedType::TagKind Tag); 615 616 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 617 ObjCProtocolDecl **Protocols = 0, 618 unsigned NumProtocols = 0); 619 620 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 621 /// given interface decl and the conforming protocol list. 622 QualType getObjCObjectPointerType(QualType OIT, 623 ObjCProtocolDecl **ProtocolList = 0, 624 unsigned NumProtocols = 0); 625 626 /// getTypeOfType - GCC extension. 627 QualType getTypeOfExprType(Expr *e); 628 QualType getTypeOfType(QualType t); 629 630 /// getDecltypeType - C++0x decltype. 631 QualType getDecltypeType(Expr *e); 632 633 /// getTagDeclType - Return the unique reference to the type for the 634 /// specified TagDecl (struct/union/class/enum) decl. 635 QualType getTagDeclType(const TagDecl *Decl); 636 637 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 638 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 639 CanQualType getSizeType() const; 640 641 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 642 /// returns a type compatible with the type defined in <stddef.h> as defined 643 /// by the target. 644 QualType getWCharType() const { return WCharTy; } 645 646 /// getSignedWCharType - Return the type of "signed wchar_t". 647 /// Used when in C++, as a GCC extension. 648 QualType getSignedWCharType() const; 649 650 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 651 /// Used when in C++, as a GCC extension. 652 QualType getUnsignedWCharType() const; 653 654 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 655 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 656 QualType getPointerDiffType() const; 657 658 // getCFConstantStringType - Return the C structure type used to represent 659 // constant CFStrings. 660 QualType getCFConstantStringType(); 661 662 /// Get the structure type used to representation CFStrings, or NULL 663 /// if it hasn't yet been built. 664 QualType getRawCFConstantStringType() { 665 if (CFConstantStringTypeDecl) 666 return getTagDeclType(CFConstantStringTypeDecl); 667 return QualType(); 668 } 669 void setCFConstantStringType(QualType T); 670 671 // This setter/getter represents the ObjC type for an NSConstantString. 672 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 673 QualType getObjCConstantStringInterface() const { 674 return ObjCConstantStringType; 675 } 676 677 //// This gets the struct used to keep track of fast enumerations. 678 QualType getObjCFastEnumerationStateType(); 679 680 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 681 /// been built. 682 QualType getRawObjCFastEnumerationStateType() { 683 if (ObjCFastEnumerationStateTypeDecl) 684 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 685 return QualType(); 686 } 687 688 void setObjCFastEnumerationStateType(QualType T); 689 690 /// \brief Set the type for the C FILE type. 691 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 692 693 /// \brief Retrieve the C FILE type. 694 QualType getFILEType() { 695 if (FILEDecl) 696 return getTypeDeclType(FILEDecl); 697 return QualType(); 698 } 699 700 /// \brief Set the type for the C jmp_buf type. 701 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 702 this->jmp_bufDecl = jmp_bufDecl; 703 } 704 705 /// \brief Retrieve the C jmp_buf type. 706 QualType getjmp_bufType() { 707 if (jmp_bufDecl) 708 return getTypeDeclType(jmp_bufDecl); 709 return QualType(); 710 } 711 712 /// \brief Set the type for the C sigjmp_buf type. 713 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 714 this->sigjmp_bufDecl = sigjmp_bufDecl; 715 } 716 717 /// \brief Retrieve the C sigjmp_buf type. 718 QualType getsigjmp_bufType() { 719 if (sigjmp_bufDecl) 720 return getTypeDeclType(sigjmp_bufDecl); 721 return QualType(); 722 } 723 724 /// getObjCEncodingForType - Emit the ObjC type encoding for the 725 /// given type into \arg S. If \arg NameFields is specified then 726 /// record field names are also encoded. 727 void getObjCEncodingForType(QualType t, std::string &S, 728 const FieldDecl *Field=0); 729 730 void getLegacyIntegralTypeEncoding(QualType &t) const; 731 732 // Put the string version of type qualifiers into S. 733 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 734 std::string &S) const; 735 736 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 737 /// declaration. 738 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 739 740 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 741 /// declaration. 742 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 743 744 /// getObjCEncodingForPropertyDecl - Return the encoded type for 745 /// this method declaration. If non-NULL, Container must be either 746 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 747 /// only be NULL when getting encodings for protocol properties. 748 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 749 const Decl *Container, 750 std::string &S); 751 752 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 753 ObjCProtocolDecl *rProto); 754 755 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 756 /// purpose in characters. 757 CharUnits getObjCEncodingTypeSize(QualType t); 758 759 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 760 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 761 QualType getObjCIdType() const { return ObjCIdTypedefType; } 762 void setObjCIdType(QualType T); 763 764 void setObjCSelType(QualType T); 765 QualType getObjCSelType() const { return ObjCSelTypedefType; } 766 767 void setObjCProtoType(QualType QT); 768 QualType getObjCProtoType() const { return ObjCProtoType; } 769 770 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 771 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 772 /// struct. 773 QualType getObjCClassType() const { return ObjCClassTypedefType; } 774 void setObjCClassType(QualType T); 775 776 void setBuiltinVaListType(QualType T); 777 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 778 779 /// getCVRQualifiedType - Returns a type with additional const, 780 /// volatile, or restrict qualifiers. 781 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 782 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 783 } 784 785 /// getQualifiedType - Returns a type with additional qualifiers. 786 QualType getQualifiedType(QualType T, Qualifiers Qs) { 787 if (!Qs.hasNonFastQualifiers()) 788 return T.withFastQualifiers(Qs.getFastQualifiers()); 789 QualifierCollector Qc(Qs); 790 const Type *Ptr = Qc.strip(T); 791 return getExtQualType(Ptr, Qc); 792 } 793 794 /// getQualifiedType - Returns a type with additional qualifiers. 795 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 796 if (!Qs.hasNonFastQualifiers()) 797 return QualType(T, Qs.getFastQualifiers()); 798 return getExtQualType(T, Qs); 799 } 800 801 DeclarationName getNameForTemplate(TemplateName Name); 802 803 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 804 UnresolvedSetIterator End); 805 806 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 807 bool TemplateKeyword, 808 TemplateDecl *Template); 809 810 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 811 const IdentifierInfo *Name); 812 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 813 OverloadedOperatorKind Operator); 814 815 enum GetBuiltinTypeError { 816 GE_None, //< No error 817 GE_Missing_stdio, //< Missing a type from <stdio.h> 818 GE_Missing_setjmp //< Missing a type from <setjmp.h> 819 }; 820 821 /// GetBuiltinType - Return the type for the specified builtin. 822 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 823 824private: 825 CanQualType getFromTargetType(unsigned Type) const; 826 827 //===--------------------------------------------------------------------===// 828 // Type Predicates. 829 //===--------------------------------------------------------------------===// 830 831public: 832 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 833 /// garbage collection attribute. 834 /// 835 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 836 837 /// isObjCNSObjectType - Return true if this is an NSObject object with 838 /// its NSObject attribute set. 839 bool isObjCNSObjectType(QualType Ty) const; 840 841 //===--------------------------------------------------------------------===// 842 // Type Sizing and Analysis 843 //===--------------------------------------------------------------------===// 844 845 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 846 /// scalar floating point type. 847 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 848 849 /// getTypeInfo - Get the size and alignment of the specified complete type in 850 /// bits. 851 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 852 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 853 return getTypeInfo(T.getTypePtr()); 854 } 855 856 /// getTypeSize - Return the size of the specified type, in bits. This method 857 /// does not work on incomplete types. 858 uint64_t getTypeSize(QualType T) { 859 return getTypeInfo(T).first; 860 } 861 uint64_t getTypeSize(const Type *T) { 862 return getTypeInfo(T).first; 863 } 864 865 /// getCharWidth - Return the size of the character type, in bits 866 uint64_t getCharWidth() { 867 return getTypeSize(CharTy); 868 } 869 870 /// getTypeSizeInChars - Return the size of the specified type, in characters. 871 /// This method does not work on incomplete types. 872 CharUnits getTypeSizeInChars(QualType T); 873 CharUnits getTypeSizeInChars(const Type *T); 874 875 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 876 /// This method does not work on incomplete types. 877 unsigned getTypeAlign(QualType T) { 878 return getTypeInfo(T).second; 879 } 880 unsigned getTypeAlign(const Type *T) { 881 return getTypeInfo(T).second; 882 } 883 884 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 885 /// characters. This method does not work on incomplete types. 886 CharUnits getTypeAlignInChars(QualType T); 887 CharUnits getTypeAlignInChars(const Type *T); 888 889 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 890 /// type for the current target in bits. This can be different than the ABI 891 /// alignment in cases where it is beneficial for performance to overalign 892 /// a data type. 893 unsigned getPreferredTypeAlign(const Type *T); 894 895 /// getDeclAlign - Return a conservative estimate of the alignment of 896 /// the specified decl. Note that bitfields do not have a valid alignment, so 897 /// this method will assert on them. 898 /// If @p RefAsPointee, references are treated like their underlying type 899 /// (for alignof), else they're treated like pointers (for CodeGen). 900 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false); 901 902 /// getASTRecordLayout - Get or compute information about the layout of the 903 /// specified record (struct/union/class), which indicates its size and field 904 /// position information. 905 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 906 907 /// getASTObjCInterfaceLayout - Get or compute information about the 908 /// layout of the specified Objective-C interface. 909 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 910 911 /// getASTObjCImplementationLayout - Get or compute information about 912 /// the layout of the specified Objective-C implementation. This may 913 /// differ from the interface if synthesized ivars are present. 914 const ASTRecordLayout & 915 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 916 917 /// getKeyFunction - Get the key function for the given record decl. 918 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 919 /// 920 /// ...the first non-pure virtual function that is not inline at the point 921 /// of class definition. 922 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 923 924 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 925 llvm::SmallVectorImpl<FieldDecl*> &Fields); 926 927 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 928 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 929 void CollectNonClassIvars(const ObjCInterfaceDecl *OI, 930 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 931 void CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 932 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 933 unsigned CountSynthesizedIvars(const ObjCInterfaceDecl *OI); 934 unsigned CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD); 935 void CollectInheritedProtocols(const Decl *CDecl, 936 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 937 938 //===--------------------------------------------------------------------===// 939 // Type Operators 940 //===--------------------------------------------------------------------===// 941 942 /// getCanonicalType - Return the canonical (structural) type corresponding to 943 /// the specified potentially non-canonical type. The non-canonical version 944 /// of a type may have many "decorated" versions of types. Decorators can 945 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 946 /// to be free of any of these, allowing two canonical types to be compared 947 /// for exact equality with a simple pointer comparison. 948 CanQualType getCanonicalType(QualType T); 949 const Type *getCanonicalType(const Type *T) { 950 return T->getCanonicalTypeInternal().getTypePtr(); 951 } 952 953 /// getCanonicalParamType - Return the canonical parameter type 954 /// corresponding to the specific potentially non-canonical one. 955 /// Qualifiers are stripped off, functions are turned into function 956 /// pointers, and arrays decay one level into pointers. 957 CanQualType getCanonicalParamType(QualType T); 958 959 /// \brief Determine whether the given types are equivalent. 960 bool hasSameType(QualType T1, QualType T2) { 961 return getCanonicalType(T1) == getCanonicalType(T2); 962 } 963 964 /// \brief Returns this type as a completely-unqualified array type, 965 /// capturing the qualifiers in Quals. This will remove the minimal amount of 966 /// sugaring from the types, similar to the behavior of 967 /// QualType::getUnqualifiedType(). 968 /// 969 /// \param T is the qualified type, which may be an ArrayType 970 /// 971 /// \param Quals will receive the full set of qualifiers that were 972 /// applied to the array. 973 /// 974 /// \returns if this is an array type, the completely unqualified array type 975 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 976 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 977 978 /// \brief Determine whether the given types are equivalent after 979 /// cvr-qualifiers have been removed. 980 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 981 CanQualType CT1 = getCanonicalType(T1); 982 CanQualType CT2 = getCanonicalType(T2); 983 984 Qualifiers Quals; 985 QualType UnqualT1 = getUnqualifiedArrayType(CT1, Quals); 986 QualType UnqualT2 = getUnqualifiedArrayType(CT2, Quals); 987 return UnqualT1 == UnqualT2; 988 } 989 990 /// \brief Retrieves the "canonical" declaration of 991 992 /// \brief Retrieves the "canonical" nested name specifier for a 993 /// given nested name specifier. 994 /// 995 /// The canonical nested name specifier is a nested name specifier 996 /// that uniquely identifies a type or namespace within the type 997 /// system. For example, given: 998 /// 999 /// \code 1000 /// namespace N { 1001 /// struct S { 1002 /// template<typename T> struct X { typename T* type; }; 1003 /// }; 1004 /// } 1005 /// 1006 /// template<typename T> struct Y { 1007 /// typename N::S::X<T>::type member; 1008 /// }; 1009 /// \endcode 1010 /// 1011 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1012 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1013 /// by declarations in the type system and the canonical type for 1014 /// the template type parameter 'T' is template-param-0-0. 1015 NestedNameSpecifier * 1016 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 1017 1018 /// \brief Retrieves the canonical representation of the given 1019 /// calling convention. 1020 CallingConv getCanonicalCallConv(CallingConv CC) { 1021 if (CC == CC_C) 1022 return CC_Default; 1023 return CC; 1024 } 1025 1026 /// \brief Determines whether two calling conventions name the same 1027 /// calling convention. 1028 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1029 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1030 } 1031 1032 /// \brief Retrieves the "canonical" template name that refers to a 1033 /// given template. 1034 /// 1035 /// The canonical template name is the simplest expression that can 1036 /// be used to refer to a given template. For most templates, this 1037 /// expression is just the template declaration itself. For example, 1038 /// the template std::vector can be referred to via a variety of 1039 /// names---std::vector, ::std::vector, vector (if vector is in 1040 /// scope), etc.---but all of these names map down to the same 1041 /// TemplateDecl, which is used to form the canonical template name. 1042 /// 1043 /// Dependent template names are more interesting. Here, the 1044 /// template name could be something like T::template apply or 1045 /// std::allocator<T>::template rebind, where the nested name 1046 /// specifier itself is dependent. In this case, the canonical 1047 /// template name uses the shortest form of the dependent 1048 /// nested-name-specifier, which itself contains all canonical 1049 /// types, values, and templates. 1050 TemplateName getCanonicalTemplateName(TemplateName Name); 1051 1052 /// \brief Determine whether the given template names refer to the same 1053 /// template. 1054 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1055 1056 /// \brief Retrieve the "canonical" template argument. 1057 /// 1058 /// The canonical template argument is the simplest template argument 1059 /// (which may be a type, value, expression, or declaration) that 1060 /// expresses the value of the argument. 1061 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 1062 1063 /// Type Query functions. If the type is an instance of the specified class, 1064 /// return the Type pointer for the underlying maximally pretty type. This 1065 /// is a member of ASTContext because this may need to do some amount of 1066 /// canonicalization, e.g. to move type qualifiers into the element type. 1067 const ArrayType *getAsArrayType(QualType T); 1068 const ConstantArrayType *getAsConstantArrayType(QualType T) { 1069 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1070 } 1071 const VariableArrayType *getAsVariableArrayType(QualType T) { 1072 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1073 } 1074 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 1075 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1076 } 1077 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) { 1078 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1079 } 1080 1081 /// getBaseElementType - Returns the innermost element type of an array type. 1082 /// For example, will return "int" for int[m][n] 1083 QualType getBaseElementType(const ArrayType *VAT); 1084 1085 /// getBaseElementType - Returns the innermost element type of a type 1086 /// (which needn't actually be an array type). 1087 QualType getBaseElementType(QualType QT); 1088 1089 /// getConstantArrayElementCount - Returns number of constant array elements. 1090 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1091 1092 /// getArrayDecayedType - Return the properly qualified result of decaying the 1093 /// specified array type to a pointer. This operation is non-trivial when 1094 /// handling typedefs etc. The canonical type of "T" must be an array type, 1095 /// this returns a pointer to a properly qualified element of the array. 1096 /// 1097 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1098 QualType getArrayDecayedType(QualType T); 1099 1100 /// getPromotedIntegerType - Returns the type that Promotable will 1101 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1102 /// integer type. 1103 QualType getPromotedIntegerType(QualType PromotableType); 1104 1105 /// \brief Whether this is a promotable bitfield reference according 1106 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1107 /// 1108 /// \returns the type this bit-field will promote to, or NULL if no 1109 /// promotion occurs. 1110 QualType isPromotableBitField(Expr *E); 1111 1112 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1113 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1114 /// LHS < RHS, return -1. 1115 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1116 1117 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1118 /// point types, ignoring the domain of the type (i.e. 'double' == 1119 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1120 /// LHS < RHS, return -1. 1121 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1122 1123 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1124 /// point or a complex type (based on typeDomain/typeSize). 1125 /// 'typeDomain' is a real floating point or complex type. 1126 /// 'typeSize' is a real floating point or complex type. 1127 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1128 QualType typeDomain) const; 1129 1130private: 1131 // Helper for integer ordering 1132 unsigned getIntegerRank(Type* T); 1133 1134public: 1135 1136 //===--------------------------------------------------------------------===// 1137 // Type Compatibility Predicates 1138 //===--------------------------------------------------------------------===// 1139 1140 /// Compatibility predicates used to check assignment expressions. 1141 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1142 1143 bool isObjCIdType(QualType T) const { 1144 return T == ObjCIdTypedefType; 1145 } 1146 bool isObjCClassType(QualType T) const { 1147 return T == ObjCClassTypedefType; 1148 } 1149 bool isObjCSelType(QualType T) const { 1150 return T == ObjCSelTypedefType; 1151 } 1152 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1153 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1154 bool ForCompare); 1155 1156 // Check the safety of assignment from LHS to RHS 1157 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1158 const ObjCObjectPointerType *RHSOPT); 1159 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1160 const ObjCInterfaceType *RHS); 1161 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1162 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1163 const ObjCObjectPointerType *RHSOPT); 1164 1165 // Functions for calculating composite types 1166 QualType mergeTypes(QualType, QualType); 1167 QualType mergeFunctionTypes(QualType, QualType); 1168 1169 /// UsualArithmeticConversionsType - handles the various conversions 1170 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1171 /// and returns the result type of that conversion. 1172 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1173 1174 //===--------------------------------------------------------------------===// 1175 // Integer Predicates 1176 //===--------------------------------------------------------------------===// 1177 1178 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1179 // of bits in an integer type excluding any padding bits. 1180 unsigned getIntWidth(QualType T); 1181 1182 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1183 // unsigned integer type. This method takes a signed type, and returns the 1184 // corresponding unsigned integer type. 1185 QualType getCorrespondingUnsignedType(QualType T); 1186 1187 //===--------------------------------------------------------------------===// 1188 // Type Iterators. 1189 //===--------------------------------------------------------------------===// 1190 1191 typedef std::vector<Type*>::iterator type_iterator; 1192 typedef std::vector<Type*>::const_iterator const_type_iterator; 1193 1194 type_iterator types_begin() { return Types.begin(); } 1195 type_iterator types_end() { return Types.end(); } 1196 const_type_iterator types_begin() const { return Types.begin(); } 1197 const_type_iterator types_end() const { return Types.end(); } 1198 1199 //===--------------------------------------------------------------------===// 1200 // Integer Values 1201 //===--------------------------------------------------------------------===// 1202 1203 /// MakeIntValue - Make an APSInt of the appropriate width and 1204 /// signedness for the given \arg Value and integer \arg Type. 1205 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1206 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1207 Res = Value; 1208 return Res; 1209 } 1210 1211 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1212 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1213 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1214 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1215 1216 /// \brief Set the implementation of ObjCInterfaceDecl. 1217 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1218 ObjCImplementationDecl *ImplD); 1219 /// \brief Set the implementation of ObjCCategoryDecl. 1220 void setObjCImplementation(ObjCCategoryDecl *CatD, 1221 ObjCCategoryImplDecl *ImplD); 1222 1223 /// \brief Allocate an uninitialized TypeSourceInfo. 1224 /// 1225 /// The caller should initialize the memory held by TypeSourceInfo using 1226 /// the TypeLoc wrappers. 1227 /// 1228 /// \param T the type that will be the basis for type source info. This type 1229 /// should refer to how the declarator was written in source code, not to 1230 /// what type semantic analysis resolved the declarator to. 1231 /// 1232 /// \param Size the size of the type info to create, or 0 if the size 1233 /// should be calculated based on the type. 1234 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0); 1235 1236 /// \brief Allocate a TypeSourceInfo where all locations have been 1237 /// initialized to a given location, which defaults to the empty 1238 /// location. 1239 TypeSourceInfo * 1240 getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation()); 1241 1242private: 1243 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1244 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1245 1246 void InitBuiltinTypes(); 1247 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1248 1249 // Return the ObjC type encoding for a given type. 1250 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1251 bool ExpandPointedToStructures, 1252 bool ExpandStructures, 1253 const FieldDecl *Field, 1254 bool OutermostType = false, 1255 bool EncodingProperty = false); 1256 1257 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1258 const ObjCImplementationDecl *Impl); 1259 1260private: 1261 // FIXME: This currently contains the set of StoredDeclMaps used 1262 // by DeclContext objects. This probably should not be in ASTContext, 1263 // but we include it here so that ASTContext can quickly deallocate them. 1264 std::vector<void*> SDMs; 1265 friend class DeclContext; 1266 void *CreateStoredDeclsMap(); 1267 void ReleaseDeclContextMaps(); 1268}; 1269 1270/// @brief Utility function for constructing a nullary selector. 1271static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1272 IdentifierInfo* II = &Ctx.Idents.get(name); 1273 return Ctx.Selectors.getSelector(0, &II); 1274} 1275 1276/// @brief Utility function for constructing an unary selector. 1277static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1278 IdentifierInfo* II = &Ctx.Idents.get(name); 1279 return Ctx.Selectors.getSelector(1, &II); 1280} 1281 1282} // end namespace clang 1283 1284// operator new and delete aren't allowed inside namespaces. 1285// The throw specifications are mandated by the standard. 1286/// @brief Placement new for using the ASTContext's allocator. 1287/// 1288/// This placement form of operator new uses the ASTContext's allocator for 1289/// obtaining memory. It is a non-throwing new, which means that it returns 1290/// null on error. (If that is what the allocator does. The current does, so if 1291/// this ever changes, this operator will have to be changed, too.) 1292/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1293/// @code 1294/// // Default alignment (16) 1295/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1296/// // Specific alignment 1297/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments); 1298/// @endcode 1299/// Please note that you cannot use delete on the pointer; it must be 1300/// deallocated using an explicit destructor call followed by 1301/// @c Context.Deallocate(Ptr). 1302/// 1303/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1304/// @param C The ASTContext that provides the allocator. 1305/// @param Alignment The alignment of the allocated memory (if the underlying 1306/// allocator supports it). 1307/// @return The allocated memory. Could be NULL. 1308inline void *operator new(size_t Bytes, clang::ASTContext &C, 1309 size_t Alignment) throw () { 1310 return C.Allocate(Bytes, Alignment); 1311} 1312/// @brief Placement delete companion to the new above. 1313/// 1314/// This operator is just a companion to the new above. There is no way of 1315/// invoking it directly; see the new operator for more details. This operator 1316/// is called implicitly by the compiler if a placement new expression using 1317/// the ASTContext throws in the object constructor. 1318inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1319 throw () { 1320 C.Deallocate(Ptr); 1321} 1322 1323/// This placement form of operator new[] uses the ASTContext's allocator for 1324/// obtaining memory. It is a non-throwing new[], which means that it returns 1325/// null on error. 1326/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1327/// @code 1328/// // Default alignment (16) 1329/// char *data = new (Context) char[10]; 1330/// // Specific alignment 1331/// char *data = new (Context, 8) char[10]; 1332/// @endcode 1333/// Please note that you cannot use delete on the pointer; it must be 1334/// deallocated using an explicit destructor call followed by 1335/// @c Context.Deallocate(Ptr). 1336/// 1337/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1338/// @param C The ASTContext that provides the allocator. 1339/// @param Alignment The alignment of the allocated memory (if the underlying 1340/// allocator supports it). 1341/// @return The allocated memory. Could be NULL. 1342inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1343 size_t Alignment = 16) throw () { 1344 return C.Allocate(Bytes, Alignment); 1345} 1346 1347/// @brief Placement delete[] companion to the new[] above. 1348/// 1349/// This operator is just a companion to the new[] above. There is no way of 1350/// invoking it directly; see the new[] operator for more details. This operator 1351/// is called implicitly by the compiler if a placement new[] expression using 1352/// the ASTContext throws in the object constructor. 1353inline void operator delete[](void *Ptr, clang::ASTContext &C, size_t) 1354 throw () { 1355 C.Deallocate(Ptr); 1356} 1357 1358#endif 1359