ASTContext.h revision 184d7900e0202ac468710b731e42075129bb6000
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/Basic/PartialDiagnostic.h" 21#include "clang/AST/Attr.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 "clang/AST/UsuallyTinyPtrVector.h" 29#include "llvm/ADT/DenseMap.h" 30#include "llvm/ADT/FoldingSet.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/Support/Allocator.h" 34#include <vector> 35 36namespace llvm { 37 struct fltSemantics; 38 class raw_ostream; 39} 40 41namespace clang { 42 class FileManager; 43 class ASTRecordLayout; 44 class BlockExpr; 45 class CharUnits; 46 class Diagnostic; 47 class Expr; 48 class ExternalASTSource; 49 class IdentifierTable; 50 class SelectorTable; 51 class SourceManager; 52 class TargetInfo; 53 // Decls 54 class DeclContext; 55 class CXXMethodDecl; 56 class CXXRecordDecl; 57 class Decl; 58 class FieldDecl; 59 class ObjCIvarDecl; 60 class ObjCIvarRefExpr; 61 class ObjCPropertyDecl; 62 class RecordDecl; 63 class StoredDeclsMap; 64 class TagDecl; 65 class TemplateTypeParmDecl; 66 class TranslationUnitDecl; 67 class TypeDecl; 68 class TypedefDecl; 69 class UsingDecl; 70 class UsingShadowDecl; 71 class UnresolvedSetIterator; 72 73 namespace Builtin { class Context; } 74 75/// ASTContext - This class holds long-lived AST nodes (such as types and 76/// decls) that can be referred to throughout the semantic analysis of a file. 77class ASTContext { 78 std::vector<Type*> Types; 79 llvm::FoldingSet<ExtQuals> ExtQualNodes; 80 llvm::FoldingSet<ComplexType> ComplexTypes; 81 llvm::FoldingSet<PointerType> PointerTypes; 82 llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 83 llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 84 llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 85 llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 86 llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 87 llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 88 std::vector<VariableArrayType*> VariableArrayTypes; 89 llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 90 llvm::FoldingSet<DependentSizedExtVectorType> DependentSizedExtVectorTypes; 91 llvm::FoldingSet<VectorType> VectorTypes; 92 llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 93 llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 94 llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 95 llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 96 llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 97 llvm::FoldingSet<SubstTemplateTypeParmType> SubstTemplateTypeParmTypes; 98 llvm::FoldingSet<TemplateSpecializationType> TemplateSpecializationTypes; 99 llvm::FoldingSet<QualifiedNameType> QualifiedNameTypes; 100 llvm::FoldingSet<DependentNameType> DependentNameTypes; 101 llvm::FoldingSet<ObjCInterfaceType> ObjCInterfaceTypes; 102 llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 103 llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 104 105 llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 106 llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 107 108 /// \brief The set of nested name specifiers. 109 /// 110 /// This set is managed by the NestedNameSpecifier class. 111 llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 112 NestedNameSpecifier *GlobalNestedNameSpecifier; 113 friend class NestedNameSpecifier; 114 115 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 116 /// This is lazily created. This is intentionally not serialized. 117 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts; 118 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> ObjCLayouts; 119 120 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 121 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 122 123 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 124 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 125 126 /// BuiltinVaListType - built-in va list type. 127 /// This is initially null and set by Sema::LazilyCreateBuiltin when 128 /// a builtin that takes a valist is encountered. 129 QualType BuiltinVaListType; 130 131 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 132 QualType ObjCIdTypedefType; 133 134 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 135 QualType ObjCSelTypedefType; 136 137 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 138 QualType ObjCProtoType; 139 const RecordType *ProtoStructType; 140 141 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 142 QualType ObjCClassTypedefType; 143 144 QualType ObjCConstantStringType; 145 RecordDecl *CFConstantStringTypeDecl; 146 147 RecordDecl *NSConstantStringTypeDecl; 148 149 RecordDecl *ObjCFastEnumerationStateTypeDecl; 150 151 /// \brief The type for the C FILE type. 152 TypeDecl *FILEDecl; 153 154 /// \brief The type for the C jmp_buf type. 155 TypeDecl *jmp_bufDecl; 156 157 /// \brief The type for the C sigjmp_buf type. 158 TypeDecl *sigjmp_bufDecl; 159 160 /// \brief Type for the Block descriptor for Blocks CodeGen. 161 RecordDecl *BlockDescriptorType; 162 163 /// \brief Type for the Block descriptor for Blocks CodeGen. 164 RecordDecl *BlockDescriptorExtendedType; 165 166 /// \brief Keeps track of all declaration attributes. 167 /// 168 /// Since so few decls have attrs, we keep them in a hash map instead of 169 /// wasting space in the Decl class. 170 llvm::DenseMap<const Decl*, Attr*> DeclAttrs; 171 172 /// \brief Keeps track of the static data member templates from which 173 /// static data members of class template specializations were instantiated. 174 /// 175 /// This data structure stores the mapping from instantiations of static 176 /// data members to the static data member representations within the 177 /// class template from which they were instantiated along with the kind 178 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 179 /// 180 /// Given the following example: 181 /// 182 /// \code 183 /// template<typename T> 184 /// struct X { 185 /// static T value; 186 /// }; 187 /// 188 /// template<typename T> 189 /// T X<T>::value = T(17); 190 /// 191 /// int *x = &X<int>::value; 192 /// \endcode 193 /// 194 /// This mapping will contain an entry that maps from the VarDecl for 195 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 196 /// class template X) and will be marked TSK_ImplicitInstantiation. 197 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 198 InstantiatedFromStaticDataMember; 199 200 /// \brief Keeps track of the declaration from which a UsingDecl was 201 /// created during instantiation. The source declaration is always 202 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 203 /// UnresolvedUsingTypenameDecl. 204 /// 205 /// For example: 206 /// \code 207 /// template<typename T> 208 /// struct A { 209 /// void f(); 210 /// }; 211 /// 212 /// template<typename T> 213 /// struct B : A<T> { 214 /// using A<T>::f; 215 /// }; 216 /// 217 /// template struct B<int>; 218 /// \endcode 219 /// 220 /// This mapping will contain an entry that maps from the UsingDecl in 221 /// B<int> to the UnresolvedUsingDecl in B<T>. 222 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 223 224 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 225 InstantiatedFromUsingShadowDecl; 226 227 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 228 229 /// \brief Mapping that stores the methods overridden by a given C++ 230 /// member function. 231 /// 232 /// Since most C++ member functions aren't virtual and therefore 233 /// don't override anything, we store the overridden functions in 234 /// this map on the side rather than within the CXXMethodDecl structure. 235 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 236 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 237 238 TranslationUnitDecl *TUDecl; 239 240 /// SourceMgr - The associated SourceManager object. 241 SourceManager &SourceMgr; 242 243 /// LangOpts - The language options used to create the AST associated with 244 /// this ASTContext object. 245 LangOptions LangOpts; 246 247 /// MallocAlloc/BumpAlloc - The allocator objects used to create AST objects. 248 bool FreeMemory; 249 llvm::MallocAllocator MallocAlloc; 250 llvm::BumpPtrAllocator BumpAlloc; 251 252 /// \brief Allocator for partial diagnostics. 253 PartialDiagnostic::StorageAllocator DiagAllocator; 254 255public: 256 const TargetInfo &Target; 257 IdentifierTable &Idents; 258 SelectorTable &Selectors; 259 Builtin::Context &BuiltinInfo; 260 DeclarationNameTable DeclarationNames; 261 llvm::OwningPtr<ExternalASTSource> ExternalSource; 262 clang::PrintingPolicy PrintingPolicy; 263 264 // Typedefs which may be provided defining the structure of Objective-C 265 // pseudo-builtins 266 QualType ObjCIdRedefinitionType; 267 QualType ObjCClassRedefinitionType; 268 QualType ObjCSelRedefinitionType; 269 270 SourceManager& getSourceManager() { return SourceMgr; } 271 const SourceManager& getSourceManager() const { return SourceMgr; } 272 void *Allocate(unsigned Size, unsigned Align = 8) { 273 return FreeMemory ? MallocAlloc.Allocate(Size, Align) : 274 BumpAlloc.Allocate(Size, Align); 275 } 276 void Deallocate(void *Ptr) { 277 if (FreeMemory) 278 MallocAlloc.Deallocate(Ptr); 279 } 280 281 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 282 return DiagAllocator; 283 } 284 285 const LangOptions& getLangOptions() const { return LangOpts; } 286 287 FullSourceLoc getFullLoc(SourceLocation Loc) const { 288 return FullSourceLoc(Loc,SourceMgr); 289 } 290 291 /// \brief Retrieve the attributes for the given declaration. 292 Attr*& getDeclAttrs(const Decl *D) { return DeclAttrs[D]; } 293 294 /// \brief Erase the attributes corresponding to the given declaration. 295 void eraseDeclAttrs(const Decl *D) { DeclAttrs.erase(D); } 296 297 /// \brief If this variable is an instantiated static data member of a 298 /// class template specialization, returns the templated static data member 299 /// from which it was instantiated. 300 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 301 const VarDecl *Var); 302 303 /// \brief Note that the static data member \p Inst is an instantiation of 304 /// the static data member template \p Tmpl of a class template. 305 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 306 TemplateSpecializationKind TSK); 307 308 /// \brief If the given using decl is an instantiation of a 309 /// (possibly unresolved) using decl from a template instantiation, 310 /// return it. 311 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 312 313 /// \brief Remember that the using decl \p Inst is an instantiation 314 /// of the using decl \p Pattern of a class template. 315 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 316 317 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 318 UsingShadowDecl *Pattern); 319 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 320 321 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 322 323 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 324 325 // Access to the set of methods overridden by the given C++ method. 326 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 327 overridden_cxx_method_iterator 328 overridden_methods_begin(const CXXMethodDecl *Method) const; 329 330 overridden_cxx_method_iterator 331 overridden_methods_end(const CXXMethodDecl *Method) const; 332 333 /// \brief Note that the given C++ \p Method overrides the given \p 334 /// Overridden method. 335 void addOverriddenMethod(const CXXMethodDecl *Method, 336 const CXXMethodDecl *Overridden); 337 338 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 339 340 341 // Builtin Types. 342 CanQualType VoidTy; 343 CanQualType BoolTy; 344 CanQualType CharTy; 345 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 346 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 347 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 348 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 349 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 350 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 351 CanQualType FloatTy, DoubleTy, LongDoubleTy; 352 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 353 CanQualType VoidPtrTy, NullPtrTy; 354 CanQualType OverloadTy; 355 CanQualType DependentTy; 356 CanQualType UndeducedAutoTy; 357 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 358 359 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 360 IdentifierTable &idents, SelectorTable &sels, 361 Builtin::Context &builtins, 362 bool FreeMemory = true, unsigned size_reserve=0); 363 364 ~ASTContext(); 365 366 /// \brief Attach an external AST source to the AST context. 367 /// 368 /// The external AST source provides the ability to load parts of 369 /// the abstract syntax tree as needed from some external storage, 370 /// e.g., a precompiled header. 371 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 372 373 /// \brief Retrieve a pointer to the external AST source associated 374 /// with this AST context, if any. 375 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 376 377 void PrintStats() const; 378 const std::vector<Type*>& getTypes() const { return Types; } 379 380 //===--------------------------------------------------------------------===// 381 // Type Constructors 382 //===--------------------------------------------------------------------===// 383 384private: 385 /// getExtQualType - Return a type with extended qualifiers. 386 QualType getExtQualType(const Type *Base, Qualifiers Quals); 387 388 QualType getTypeDeclTypeSlow(const TypeDecl *Decl); 389 390public: 391 /// getAddSpaceQualType - Return the uniqued reference to the type for an 392 /// address space qualified type with the specified type and address space. 393 /// The resulting type has a union of the qualifiers from T and the address 394 /// space. If T already has an address space specifier, it is silently 395 /// replaced. 396 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace); 397 398 /// getObjCGCQualType - Returns the uniqued reference to the type for an 399 /// objc gc qualified type. The retulting type has a union of the qualifiers 400 /// from T and the gc attribute. 401 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr); 402 403 /// getRestrictType - Returns the uniqued reference to the type for a 404 /// 'restrict' qualified type. The resulting type has a union of the 405 /// qualifiers from T and 'restrict'. 406 QualType getRestrictType(QualType T) { 407 return T.withFastQualifiers(Qualifiers::Restrict); 408 } 409 410 /// getVolatileType - Returns the uniqued reference to the type for a 411 /// 'volatile' qualified type. The resulting type has a union of the 412 /// qualifiers from T and 'volatile'. 413 QualType getVolatileType(QualType T); 414 415 /// getConstType - Returns the uniqued reference to the type for a 416 /// 'const' qualified type. The resulting type has a union of the 417 /// qualifiers from T and 'const'. 418 /// 419 /// It can be reasonably expected that this will always be 420 /// equivalent to calling T.withConst(). 421 QualType getConstType(QualType T) { return T.withConst(); } 422 423 /// getNoReturnType - Add or remove the noreturn attribute to the given type 424 /// which must be a FunctionType or a pointer to an allowable type or a 425 /// BlockPointer. 426 QualType getNoReturnType(QualType T, bool AddNoReturn = true); 427 428 /// getCallConvType - Adds the specified calling convention attribute to 429 /// the given type, which must be a FunctionType or a pointer to an 430 /// allowable type. 431 QualType getCallConvType(QualType T, CallingConv CallConv); 432 433 /// getRegParmType - Sets the specified regparm attribute to 434 /// the given type, which must be a FunctionType or a pointer to an 435 /// allowable type. 436 QualType getRegParmType(QualType T, unsigned RegParm); 437 438 /// getComplexType - Return the uniqued reference to the type for a complex 439 /// number with the specified element type. 440 QualType getComplexType(QualType T); 441 CanQualType getComplexType(CanQualType T) { 442 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 443 } 444 445 /// getPointerType - Return the uniqued reference to the type for a pointer to 446 /// the specified type. 447 QualType getPointerType(QualType T); 448 CanQualType getPointerType(CanQualType T) { 449 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 450 } 451 452 /// getBlockPointerType - Return the uniqued reference to the type for a block 453 /// of the specified type. 454 QualType getBlockPointerType(QualType T); 455 456 /// This gets the struct used to keep track of the descriptor for pointer to 457 /// blocks. 458 QualType getBlockDescriptorType(); 459 460 // Set the type for a Block descriptor type. 461 void setBlockDescriptorType(QualType T); 462 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 463 QualType getRawBlockdescriptorType() { 464 if (BlockDescriptorType) 465 return getTagDeclType(BlockDescriptorType); 466 return QualType(); 467 } 468 469 /// This gets the struct used to keep track of the extended descriptor for 470 /// pointer to blocks. 471 QualType getBlockDescriptorExtendedType(); 472 473 // Set the type for a Block descriptor extended type. 474 void setBlockDescriptorExtendedType(QualType T); 475 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 476 /// built. 477 QualType getRawBlockdescriptorExtendedType() { 478 if (BlockDescriptorExtendedType) 479 return getTagDeclType(BlockDescriptorExtendedType); 480 return QualType(); 481 } 482 483 /// This gets the struct used to keep track of pointer to blocks, complete 484 /// with captured variables. 485 QualType getBlockParmType(bool BlockHasCopyDispose, 486 llvm::SmallVector<const Expr *, 8> &BDRDs); 487 488 /// This builds the struct used for __block variables. 489 QualType BuildByRefType(const char *DeclName, QualType Ty); 490 491 /// Returns true iff we need copy/dispose helpers for the given type. 492 bool BlockRequiresCopying(QualType Ty); 493 494 /// getLValueReferenceType - Return the uniqued reference to the type for an 495 /// lvalue reference to the specified type. 496 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true); 497 498 /// getRValueReferenceType - Return the uniqued reference to the type for an 499 /// rvalue reference to the specified type. 500 QualType getRValueReferenceType(QualType T); 501 502 /// getMemberPointerType - Return the uniqued reference to the type for a 503 /// member pointer to the specified type in the specified class. The class 504 /// is a Type because it could be a dependent name. 505 QualType getMemberPointerType(QualType T, const Type *Cls); 506 507 /// getVariableArrayType - Returns a non-unique reference to the type for a 508 /// variable array of the specified element type. 509 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 510 ArrayType::ArraySizeModifier ASM, 511 unsigned EltTypeQuals, 512 SourceRange Brackets); 513 514 /// getDependentSizedArrayType - Returns a non-unique reference to 515 /// the type for a dependently-sized array of the specified element 516 /// type. FIXME: We will need these to be uniqued, or at least 517 /// comparable, at some point. 518 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 519 ArrayType::ArraySizeModifier ASM, 520 unsigned EltTypeQuals, 521 SourceRange Brackets); 522 523 /// getIncompleteArrayType - Returns a unique reference to the type for a 524 /// incomplete array of the specified element type. 525 QualType getIncompleteArrayType(QualType EltTy, 526 ArrayType::ArraySizeModifier ASM, 527 unsigned EltTypeQuals); 528 529 /// getConstantArrayType - Return the unique reference to the type for a 530 /// constant array of the specified element type. 531 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 532 ArrayType::ArraySizeModifier ASM, 533 unsigned EltTypeQuals); 534 535 /// getVectorType - Return the unique reference to a vector type of 536 /// the specified element type and size. VectorType must be a built-in type. 537 QualType getVectorType(QualType VectorType, unsigned NumElts, 538 bool AltiVec, bool IsPixel); 539 540 /// getExtVectorType - Return the unique reference to an extended vector type 541 /// of the specified element type and size. VectorType must be a built-in 542 /// type. 543 QualType getExtVectorType(QualType VectorType, unsigned NumElts); 544 545 /// getDependentSizedExtVectorType - Returns a non-unique reference to 546 /// the type for a dependently-sized vector of the specified element 547 /// type. FIXME: We will need these to be uniqued, or at least 548 /// comparable, at some point. 549 QualType getDependentSizedExtVectorType(QualType VectorType, 550 Expr *SizeExpr, 551 SourceLocation AttrLoc); 552 553 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 554 /// 555 QualType getFunctionNoProtoType(QualType ResultTy, 556 const FunctionType::ExtInfo &Info); 557 558 QualType getFunctionNoProtoType(QualType ResultTy) { 559 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 560 } 561 562 /// getFunctionType - Return a normal function type with a typed argument 563 /// list. isVariadic indicates whether the argument list includes '...'. 564 QualType getFunctionType(QualType ResultTy, const QualType *ArgArray, 565 unsigned NumArgs, bool isVariadic, 566 unsigned TypeQuals, bool hasExceptionSpec, 567 bool hasAnyExceptionSpec, 568 unsigned NumExs, const QualType *ExArray, 569 const FunctionType::ExtInfo &Info); 570 571 /// getTypeDeclType - Return the unique reference to the type for 572 /// the specified type declaration. 573 QualType getTypeDeclType(const TypeDecl *Decl, 574 const TypeDecl *PrevDecl = 0) { 575 assert(Decl && "Passed null for Decl param"); 576 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 577 578 if (PrevDecl) { 579 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 580 Decl->TypeForDecl = PrevDecl->TypeForDecl; 581 return QualType(PrevDecl->TypeForDecl, 0); 582 } 583 584 return getTypeDeclTypeSlow(Decl); 585 } 586 587 /// getTypedefType - Return the unique reference to the type for the 588 /// specified typename decl. 589 QualType getTypedefType(const TypedefDecl *Decl); 590 591 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST); 592 593 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 594 QualType Replacement); 595 596 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 597 bool ParameterPack, 598 IdentifierInfo *Name = 0); 599 600 QualType getTemplateSpecializationType(TemplateName T, 601 const TemplateArgument *Args, 602 unsigned NumArgs, 603 QualType Canon = QualType()); 604 605 QualType getTemplateSpecializationType(TemplateName T, 606 const TemplateArgumentListInfo &Args, 607 QualType Canon = QualType()); 608 609 TypeSourceInfo * 610 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 611 const TemplateArgumentListInfo &Args, 612 QualType Canon = QualType()); 613 614 QualType getQualifiedNameType(NestedNameSpecifier *NNS, 615 QualType NamedType); 616 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 617 NestedNameSpecifier *NNS, 618 const IdentifierInfo *Name, 619 QualType Canon = QualType()); 620 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 621 NestedNameSpecifier *NNS, 622 const TemplateSpecializationType *TemplateId, 623 QualType Canon = QualType()); 624 QualType getElaboratedType(QualType UnderlyingType, 625 ElaboratedType::TagKind Tag); 626 627 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 628 ObjCProtocolDecl **Protocols = 0, 629 unsigned NumProtocols = 0); 630 631 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for the 632 /// given interface decl and the conforming protocol list. 633 QualType getObjCObjectPointerType(QualType OIT, 634 ObjCProtocolDecl **ProtocolList = 0, 635 unsigned NumProtocols = 0, 636 unsigned Quals = 0); 637 638 /// getTypeOfType - GCC extension. 639 QualType getTypeOfExprType(Expr *e); 640 QualType getTypeOfType(QualType t); 641 642 /// getDecltypeType - C++0x decltype. 643 QualType getDecltypeType(Expr *e); 644 645 /// getTagDeclType - Return the unique reference to the type for the 646 /// specified TagDecl (struct/union/class/enum) decl. 647 QualType getTagDeclType(const TagDecl *Decl); 648 649 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 650 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 651 CanQualType getSizeType() const; 652 653 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 654 /// returns a type compatible with the type defined in <stddef.h> as defined 655 /// by the target. 656 QualType getWCharType() const { return WCharTy; } 657 658 /// getSignedWCharType - Return the type of "signed wchar_t". 659 /// Used when in C++, as a GCC extension. 660 QualType getSignedWCharType() const; 661 662 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 663 /// Used when in C++, as a GCC extension. 664 QualType getUnsignedWCharType() const; 665 666 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 667 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 668 QualType getPointerDiffType() const; 669 670 // getCFConstantStringType - Return the C structure type used to represent 671 // constant CFStrings. 672 QualType getCFConstantStringType(); 673 674 // getNSConstantStringType - Return the C structure type used to represent 675 // constant NSStrings. 676 QualType getNSConstantStringType(); 677 /// Get the structure type used to representation NSStrings, or NULL 678 /// if it hasn't yet been built. 679 QualType getRawNSConstantStringType() { 680 if (NSConstantStringTypeDecl) 681 return getTagDeclType(NSConstantStringTypeDecl); 682 return QualType(); 683 } 684 void setNSConstantStringType(QualType T); 685 686 687 /// Get the structure type used to representation CFStrings, or NULL 688 /// if it hasn't yet been built. 689 QualType getRawCFConstantStringType() { 690 if (CFConstantStringTypeDecl) 691 return getTagDeclType(CFConstantStringTypeDecl); 692 return QualType(); 693 } 694 void setCFConstantStringType(QualType T); 695 696 // This setter/getter represents the ObjC type for an NSConstantString. 697 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 698 QualType getObjCConstantStringInterface() const { 699 return ObjCConstantStringType; 700 } 701 702 //// This gets the struct used to keep track of fast enumerations. 703 QualType getObjCFastEnumerationStateType(); 704 705 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 706 /// been built. 707 QualType getRawObjCFastEnumerationStateType() { 708 if (ObjCFastEnumerationStateTypeDecl) 709 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 710 return QualType(); 711 } 712 713 void setObjCFastEnumerationStateType(QualType T); 714 715 /// \brief Set the type for the C FILE type. 716 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 717 718 /// \brief Retrieve the C FILE type. 719 QualType getFILEType() { 720 if (FILEDecl) 721 return getTypeDeclType(FILEDecl); 722 return QualType(); 723 } 724 725 /// \brief Set the type for the C jmp_buf type. 726 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 727 this->jmp_bufDecl = jmp_bufDecl; 728 } 729 730 /// \brief Retrieve the C jmp_buf type. 731 QualType getjmp_bufType() { 732 if (jmp_bufDecl) 733 return getTypeDeclType(jmp_bufDecl); 734 return QualType(); 735 } 736 737 /// \brief Set the type for the C sigjmp_buf type. 738 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 739 this->sigjmp_bufDecl = sigjmp_bufDecl; 740 } 741 742 /// \brief Retrieve the C sigjmp_buf type. 743 QualType getsigjmp_bufType() { 744 if (sigjmp_bufDecl) 745 return getTypeDeclType(sigjmp_bufDecl); 746 return QualType(); 747 } 748 749 /// getObjCEncodingForType - Emit the ObjC type encoding for the 750 /// given type into \arg S. If \arg NameFields is specified then 751 /// record field names are also encoded. 752 void getObjCEncodingForType(QualType t, std::string &S, 753 const FieldDecl *Field=0); 754 755 void getLegacyIntegralTypeEncoding(QualType &t) const; 756 757 // Put the string version of type qualifiers into S. 758 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 759 std::string &S) const; 760 761 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 762 /// declaration. 763 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S); 764 765 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 766 /// declaration. 767 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S); 768 769 /// getObjCEncodingForPropertyDecl - Return the encoded type for 770 /// this method declaration. If non-NULL, Container must be either 771 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 772 /// only be NULL when getting encodings for protocol properties. 773 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 774 const Decl *Container, 775 std::string &S); 776 777 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 778 ObjCProtocolDecl *rProto); 779 780 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 781 /// purpose in characters. 782 CharUnits getObjCEncodingTypeSize(QualType t); 783 784 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 785 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 786 QualType getObjCIdType() const { return ObjCIdTypedefType; } 787 void setObjCIdType(QualType T); 788 789 void setObjCSelType(QualType T); 790 QualType getObjCSelType() const { return ObjCSelTypedefType; } 791 792 void setObjCProtoType(QualType QT); 793 QualType getObjCProtoType() const { return ObjCProtoType; } 794 795 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 796 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 797 /// struct. 798 QualType getObjCClassType() const { return ObjCClassTypedefType; } 799 void setObjCClassType(QualType T); 800 801 void setBuiltinVaListType(QualType T); 802 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 803 804 /// getCVRQualifiedType - Returns a type with additional const, 805 /// volatile, or restrict qualifiers. 806 QualType getCVRQualifiedType(QualType T, unsigned CVR) { 807 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 808 } 809 810 /// getQualifiedType - Returns a type with additional qualifiers. 811 QualType getQualifiedType(QualType T, Qualifiers Qs) { 812 if (!Qs.hasNonFastQualifiers()) 813 return T.withFastQualifiers(Qs.getFastQualifiers()); 814 QualifierCollector Qc(Qs); 815 const Type *Ptr = Qc.strip(T); 816 return getExtQualType(Ptr, Qc); 817 } 818 819 /// getQualifiedType - Returns a type with additional qualifiers. 820 QualType getQualifiedType(const Type *T, Qualifiers Qs) { 821 if (!Qs.hasNonFastQualifiers()) 822 return QualType(T, Qs.getFastQualifiers()); 823 return getExtQualType(T, Qs); 824 } 825 826 DeclarationName getNameForTemplate(TemplateName Name); 827 828 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 829 UnresolvedSetIterator End); 830 831 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 832 bool TemplateKeyword, 833 TemplateDecl *Template); 834 835 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 836 const IdentifierInfo *Name); 837 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 838 OverloadedOperatorKind Operator); 839 840 enum GetBuiltinTypeError { 841 GE_None, //< No error 842 GE_Missing_stdio, //< Missing a type from <stdio.h> 843 GE_Missing_setjmp //< Missing a type from <setjmp.h> 844 }; 845 846 /// GetBuiltinType - Return the type for the specified builtin. 847 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error); 848 849private: 850 CanQualType getFromTargetType(unsigned Type) const; 851 852 //===--------------------------------------------------------------------===// 853 // Type Predicates. 854 //===--------------------------------------------------------------------===// 855 856public: 857 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 858 /// garbage collection attribute. 859 /// 860 Qualifiers::GC getObjCGCAttrKind(const QualType &Ty) const; 861 862 /// isObjCNSObjectType - Return true if this is an NSObject object with 863 /// its NSObject attribute set. 864 bool isObjCNSObjectType(QualType Ty) const; 865 866 //===--------------------------------------------------------------------===// 867 // Type Sizing and Analysis 868 //===--------------------------------------------------------------------===// 869 870 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 871 /// scalar floating point type. 872 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 873 874 /// getTypeInfo - Get the size and alignment of the specified complete type in 875 /// bits. 876 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T); 877 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) { 878 return getTypeInfo(T.getTypePtr()); 879 } 880 881 /// getTypeSize - Return the size of the specified type, in bits. This method 882 /// does not work on incomplete types. 883 uint64_t getTypeSize(QualType T) { 884 return getTypeInfo(T).first; 885 } 886 uint64_t getTypeSize(const Type *T) { 887 return getTypeInfo(T).first; 888 } 889 890 /// getCharWidth - Return the size of the character type, in bits 891 uint64_t getCharWidth() { 892 return getTypeSize(CharTy); 893 } 894 895 /// getTypeSizeInChars - Return the size of the specified type, in characters. 896 /// This method does not work on incomplete types. 897 CharUnits getTypeSizeInChars(QualType T); 898 CharUnits getTypeSizeInChars(const Type *T); 899 900 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 901 /// This method does not work on incomplete types. 902 unsigned getTypeAlign(QualType T) { 903 return getTypeInfo(T).second; 904 } 905 unsigned getTypeAlign(const Type *T) { 906 return getTypeInfo(T).second; 907 } 908 909 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 910 /// characters. This method does not work on incomplete types. 911 CharUnits getTypeAlignInChars(QualType T); 912 CharUnits getTypeAlignInChars(const Type *T); 913 914 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 915 /// type for the current target in bits. This can be different than the ABI 916 /// alignment in cases where it is beneficial for performance to overalign 917 /// a data type. 918 unsigned getPreferredTypeAlign(const Type *T); 919 920 /// getDeclAlign - Return a conservative estimate of the alignment of 921 /// the specified decl. Note that bitfields do not have a valid alignment, so 922 /// this method will assert on them. 923 /// If @p RefAsPointee, references are treated like their underlying type 924 /// (for alignof), else they're treated like pointers (for CodeGen). 925 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false); 926 927 /// getASTRecordLayout - Get or compute information about the layout of the 928 /// specified record (struct/union/class), which indicates its size and field 929 /// position information. 930 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D); 931 932 /// getASTObjCInterfaceLayout - Get or compute information about the 933 /// layout of the specified Objective-C interface. 934 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D); 935 936 void DumpRecordLayout(const RecordDecl *RD, llvm::raw_ostream &OS); 937 938 /// getASTObjCImplementationLayout - Get or compute information about 939 /// the layout of the specified Objective-C implementation. This may 940 /// differ from the interface if synthesized ivars are present. 941 const ASTRecordLayout & 942 getASTObjCImplementationLayout(const ObjCImplementationDecl *D); 943 944 /// getKeyFunction - Get the key function for the given record decl. 945 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 946 /// 947 /// ...the first non-pure virtual function that is not inline at the point 948 /// of class definition. 949 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 950 951 void CollectObjCIvars(const ObjCInterfaceDecl *OI, 952 llvm::SmallVectorImpl<FieldDecl*> &Fields); 953 954 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 955 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 956 void CollectNonClassIvars(const ObjCInterfaceDecl *OI, 957 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 958 void CollectIvarsToConstructOrDestruct(const ObjCInterfaceDecl *OI, 959 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 960 bool construct=true); 961 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI); 962 void CollectInheritedProtocols(const Decl *CDecl, 963 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 964 965 //===--------------------------------------------------------------------===// 966 // Type Operators 967 //===--------------------------------------------------------------------===// 968 969 /// getCanonicalType - Return the canonical (structural) type corresponding to 970 /// the specified potentially non-canonical type. The non-canonical version 971 /// of a type may have many "decorated" versions of types. Decorators can 972 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 973 /// to be free of any of these, allowing two canonical types to be compared 974 /// for exact equality with a simple pointer comparison. 975 CanQualType getCanonicalType(QualType T); 976 const Type *getCanonicalType(const Type *T) { 977 return T->getCanonicalTypeInternal().getTypePtr(); 978 } 979 980 /// getCanonicalParamType - Return the canonical parameter type 981 /// corresponding to the specific potentially non-canonical one. 982 /// Qualifiers are stripped off, functions are turned into function 983 /// pointers, and arrays decay one level into pointers. 984 CanQualType getCanonicalParamType(QualType T); 985 986 /// \brief Determine whether the given types are equivalent. 987 bool hasSameType(QualType T1, QualType T2) { 988 return getCanonicalType(T1) == getCanonicalType(T2); 989 } 990 991 /// \brief Returns this type as a completely-unqualified array type, 992 /// capturing the qualifiers in Quals. This will remove the minimal amount of 993 /// sugaring from the types, similar to the behavior of 994 /// QualType::getUnqualifiedType(). 995 /// 996 /// \param T is the qualified type, which may be an ArrayType 997 /// 998 /// \param Quals will receive the full set of qualifiers that were 999 /// applied to the array. 1000 /// 1001 /// \returns if this is an array type, the completely unqualified array type 1002 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1003 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1004 1005 /// \brief Determine whether the given types are equivalent after 1006 /// cvr-qualifiers have been removed. 1007 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1008 CanQualType CT1 = getCanonicalType(T1); 1009 CanQualType CT2 = getCanonicalType(T2); 1010 1011 Qualifiers Quals; 1012 QualType UnqualT1 = getUnqualifiedArrayType(CT1, Quals); 1013 QualType UnqualT2 = getUnqualifiedArrayType(CT2, Quals); 1014 return UnqualT1 == UnqualT2; 1015 } 1016 1017 /// \brief Retrieves the "canonical" declaration of 1018 1019 /// \brief Retrieves the "canonical" nested name specifier for a 1020 /// given nested name specifier. 1021 /// 1022 /// The canonical nested name specifier is a nested name specifier 1023 /// that uniquely identifies a type or namespace within the type 1024 /// system. For example, given: 1025 /// 1026 /// \code 1027 /// namespace N { 1028 /// struct S { 1029 /// template<typename T> struct X { typename T* type; }; 1030 /// }; 1031 /// } 1032 /// 1033 /// template<typename T> struct Y { 1034 /// typename N::S::X<T>::type member; 1035 /// }; 1036 /// \endcode 1037 /// 1038 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1039 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1040 /// by declarations in the type system and the canonical type for 1041 /// the template type parameter 'T' is template-param-0-0. 1042 NestedNameSpecifier * 1043 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS); 1044 1045 /// \brief Retrieves the canonical representation of the given 1046 /// calling convention. 1047 CallingConv getCanonicalCallConv(CallingConv CC) { 1048 if (CC == CC_C) 1049 return CC_Default; 1050 return CC; 1051 } 1052 1053 /// \brief Determines whether two calling conventions name the same 1054 /// calling convention. 1055 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1056 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1057 } 1058 1059 /// \brief Retrieves the "canonical" template name that refers to a 1060 /// given template. 1061 /// 1062 /// The canonical template name is the simplest expression that can 1063 /// be used to refer to a given template. For most templates, this 1064 /// expression is just the template declaration itself. For example, 1065 /// the template std::vector can be referred to via a variety of 1066 /// names---std::vector, ::std::vector, vector (if vector is in 1067 /// scope), etc.---but all of these names map down to the same 1068 /// TemplateDecl, which is used to form the canonical template name. 1069 /// 1070 /// Dependent template names are more interesting. Here, the 1071 /// template name could be something like T::template apply or 1072 /// std::allocator<T>::template rebind, where the nested name 1073 /// specifier itself is dependent. In this case, the canonical 1074 /// template name uses the shortest form of the dependent 1075 /// nested-name-specifier, which itself contains all canonical 1076 /// types, values, and templates. 1077 TemplateName getCanonicalTemplateName(TemplateName Name); 1078 1079 /// \brief Determine whether the given template names refer to the same 1080 /// template. 1081 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1082 1083 /// \brief Retrieve the "canonical" template argument. 1084 /// 1085 /// The canonical template argument is the simplest template argument 1086 /// (which may be a type, value, expression, or declaration) that 1087 /// expresses the value of the argument. 1088 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg); 1089 1090 /// Type Query functions. If the type is an instance of the specified class, 1091 /// return the Type pointer for the underlying maximally pretty type. This 1092 /// is a member of ASTContext because this may need to do some amount of 1093 /// canonicalization, e.g. to move type qualifiers into the element type. 1094 const ArrayType *getAsArrayType(QualType T); 1095 const ConstantArrayType *getAsConstantArrayType(QualType T) { 1096 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1097 } 1098 const VariableArrayType *getAsVariableArrayType(QualType T) { 1099 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1100 } 1101 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) { 1102 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1103 } 1104 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) { 1105 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1106 } 1107 1108 /// getBaseElementType - Returns the innermost element type of an array type. 1109 /// For example, will return "int" for int[m][n] 1110 QualType getBaseElementType(const ArrayType *VAT); 1111 1112 /// getBaseElementType - Returns the innermost element type of a type 1113 /// (which needn't actually be an array type). 1114 QualType getBaseElementType(QualType QT); 1115 1116 /// getConstantArrayElementCount - Returns number of constant array elements. 1117 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1118 1119 /// getArrayDecayedType - Return the properly qualified result of decaying the 1120 /// specified array type to a pointer. This operation is non-trivial when 1121 /// handling typedefs etc. The canonical type of "T" must be an array type, 1122 /// this returns a pointer to a properly qualified element of the array. 1123 /// 1124 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1125 QualType getArrayDecayedType(QualType T); 1126 1127 /// getPromotedIntegerType - Returns the type that Promotable will 1128 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1129 /// integer type. 1130 QualType getPromotedIntegerType(QualType PromotableType); 1131 1132 /// \brief Whether this is a promotable bitfield reference according 1133 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1134 /// 1135 /// \returns the type this bit-field will promote to, or NULL if no 1136 /// promotion occurs. 1137 QualType isPromotableBitField(Expr *E); 1138 1139 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1140 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1141 /// LHS < RHS, return -1. 1142 int getIntegerTypeOrder(QualType LHS, QualType RHS); 1143 1144 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1145 /// point types, ignoring the domain of the type (i.e. 'double' == 1146 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1147 /// LHS < RHS, return -1. 1148 int getFloatingTypeOrder(QualType LHS, QualType RHS); 1149 1150 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1151 /// point or a complex type (based on typeDomain/typeSize). 1152 /// 'typeDomain' is a real floating point or complex type. 1153 /// 'typeSize' is a real floating point or complex type. 1154 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1155 QualType typeDomain) const; 1156 1157private: 1158 // Helper for integer ordering 1159 unsigned getIntegerRank(Type* T); 1160 1161public: 1162 1163 //===--------------------------------------------------------------------===// 1164 // Type Compatibility Predicates 1165 //===--------------------------------------------------------------------===// 1166 1167 /// Compatibility predicates used to check assignment expressions. 1168 bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1 1169 1170 bool typesAreBlockPointerCompatible(QualType, QualType); 1171 1172 bool isObjCIdType(QualType T) const { 1173 return T == ObjCIdTypedefType; 1174 } 1175 bool isObjCClassType(QualType T) const { 1176 return T == ObjCClassTypedefType; 1177 } 1178 bool isObjCSelType(QualType T) const { 1179 return T == ObjCSelTypedefType; 1180 } 1181 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1182 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1183 bool ForCompare); 1184 1185 // Check the safety of assignment from LHS to RHS 1186 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1187 const ObjCObjectPointerType *RHSOPT); 1188 bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 1189 const ObjCInterfaceType *RHS); 1190 bool canAssignObjCInterfacesInBlockPointer( 1191 const ObjCObjectPointerType *LHSOPT, 1192 const ObjCObjectPointerType *RHSOPT); 1193 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1194 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1195 const ObjCObjectPointerType *RHSOPT); 1196 1197 // Functions for calculating composite types 1198 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false); 1199 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false); 1200 1201 /// UsualArithmeticConversionsType - handles the various conversions 1202 /// that are common to binary operators (C99 6.3.1.8, C++ [expr]p9) 1203 /// and returns the result type of that conversion. 1204 QualType UsualArithmeticConversionsType(QualType lhs, QualType rhs); 1205 1206 //===--------------------------------------------------------------------===// 1207 // Integer Predicates 1208 //===--------------------------------------------------------------------===// 1209 1210 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1211 // of bits in an integer type excluding any padding bits. 1212 unsigned getIntWidth(QualType T); 1213 1214 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1215 // unsigned integer type. This method takes a signed type, and returns the 1216 // corresponding unsigned integer type. 1217 QualType getCorrespondingUnsignedType(QualType T); 1218 1219 //===--------------------------------------------------------------------===// 1220 // Type Iterators. 1221 //===--------------------------------------------------------------------===// 1222 1223 typedef std::vector<Type*>::iterator type_iterator; 1224 typedef std::vector<Type*>::const_iterator const_type_iterator; 1225 1226 type_iterator types_begin() { return Types.begin(); } 1227 type_iterator types_end() { return Types.end(); } 1228 const_type_iterator types_begin() const { return Types.begin(); } 1229 const_type_iterator types_end() const { return Types.end(); } 1230 1231 //===--------------------------------------------------------------------===// 1232 // Integer Values 1233 //===--------------------------------------------------------------------===// 1234 1235 /// MakeIntValue - Make an APSInt of the appropriate width and 1236 /// signedness for the given \arg Value and integer \arg Type. 1237 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) { 1238 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1239 Res = Value; 1240 return Res; 1241 } 1242 1243 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1244 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1245 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1246 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1247 1248 /// \brief Set the implementation of ObjCInterfaceDecl. 1249 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1250 ObjCImplementationDecl *ImplD); 1251 /// \brief Set the implementation of ObjCCategoryDecl. 1252 void setObjCImplementation(ObjCCategoryDecl *CatD, 1253 ObjCCategoryImplDecl *ImplD); 1254 1255 /// \brief Allocate an uninitialized TypeSourceInfo. 1256 /// 1257 /// The caller should initialize the memory held by TypeSourceInfo using 1258 /// the TypeLoc wrappers. 1259 /// 1260 /// \param T the type that will be the basis for type source info. This type 1261 /// should refer to how the declarator was written in source code, not to 1262 /// what type semantic analysis resolved the declarator to. 1263 /// 1264 /// \param Size the size of the type info to create, or 0 if the size 1265 /// should be calculated based on the type. 1266 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0); 1267 1268 /// \brief Allocate a TypeSourceInfo where all locations have been 1269 /// initialized to a given location, which defaults to the empty 1270 /// location. 1271 TypeSourceInfo * 1272 getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation()); 1273 1274private: 1275 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1276 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1277 1278 void InitBuiltinTypes(); 1279 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1280 1281 // Return the ObjC type encoding for a given type. 1282 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1283 bool ExpandPointedToStructures, 1284 bool ExpandStructures, 1285 const FieldDecl *Field, 1286 bool OutermostType = false, 1287 bool EncodingProperty = false); 1288 1289 const ASTRecordLayout &getObjCLayout(const ObjCInterfaceDecl *D, 1290 const ObjCImplementationDecl *Impl); 1291 1292private: 1293 // FIXME: This currently contains the set of StoredDeclMaps used 1294 // by DeclContext objects. This probably should not be in ASTContext, 1295 // but we include it here so that ASTContext can quickly deallocate them. 1296 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1297 friend class DeclContext; 1298 void ReleaseDeclContextMaps(); 1299}; 1300 1301/// @brief Utility function for constructing a nullary selector. 1302static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1303 IdentifierInfo* II = &Ctx.Idents.get(name); 1304 return Ctx.Selectors.getSelector(0, &II); 1305} 1306 1307/// @brief Utility function for constructing an unary selector. 1308static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1309 IdentifierInfo* II = &Ctx.Idents.get(name); 1310 return Ctx.Selectors.getSelector(1, &II); 1311} 1312 1313} // end namespace clang 1314 1315// operator new and delete aren't allowed inside namespaces. 1316// The throw specifications are mandated by the standard. 1317/// @brief Placement new for using the ASTContext's allocator. 1318/// 1319/// This placement form of operator new uses the ASTContext's allocator for 1320/// obtaining memory. It is a non-throwing new, which means that it returns 1321/// null on error. (If that is what the allocator does. The current does, so if 1322/// this ever changes, this operator will have to be changed, too.) 1323/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1324/// @code 1325/// // Default alignment (8) 1326/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1327/// // Specific alignment 1328/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1329/// @endcode 1330/// Please note that you cannot use delete on the pointer; it must be 1331/// deallocated using an explicit destructor call followed by 1332/// @c Context.Deallocate(Ptr). 1333/// 1334/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1335/// @param C The ASTContext that provides the allocator. 1336/// @param Alignment The alignment of the allocated memory (if the underlying 1337/// allocator supports it). 1338/// @return The allocated memory. Could be NULL. 1339inline void *operator new(size_t Bytes, clang::ASTContext &C, 1340 size_t Alignment) throw () { 1341 return C.Allocate(Bytes, Alignment); 1342} 1343/// @brief Placement delete companion to the new above. 1344/// 1345/// This operator is just a companion to the new above. There is no way of 1346/// invoking it directly; see the new operator for more details. This operator 1347/// is called implicitly by the compiler if a placement new expression using 1348/// the ASTContext throws in the object constructor. 1349inline void operator delete(void *Ptr, clang::ASTContext &C, size_t) 1350 throw () { 1351 C.Deallocate(Ptr); 1352} 1353 1354/// This placement form of operator new[] uses the ASTContext's allocator for 1355/// obtaining memory. It is a non-throwing new[], which means that it returns 1356/// null on error. 1357/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1358/// @code 1359/// // Default alignment (8) 1360/// char *data = new (Context) char[10]; 1361/// // Specific alignment 1362/// char *data = new (Context, 4) char[10]; 1363/// @endcode 1364/// Please note that you cannot use delete on the pointer; it must be 1365/// deallocated using an explicit destructor call followed by 1366/// @c Context.Deallocate(Ptr). 1367/// 1368/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1369/// @param C The ASTContext that provides the allocator. 1370/// @param Alignment The alignment of the allocated memory (if the underlying 1371/// allocator supports it). 1372/// @return The allocated memory. Could be NULL. 1373inline void *operator new[](size_t Bytes, clang::ASTContext& C, 1374 size_t Alignment = 8) throw () { 1375 return C.Allocate(Bytes, Alignment); 1376} 1377 1378/// @brief Placement delete[] companion to the new[] above. 1379/// 1380/// This operator is just a companion to the new[] above. There is no way of 1381/// invoking it directly; see the new[] operator for more details. This operator 1382/// is called implicitly by the compiler if a placement new[] expression using 1383/// the ASTContext throws in the object constructor. 1384inline void operator delete[](void *Ptr, clang::ASTContext &C, size_t) 1385 throw () { 1386 C.Deallocate(Ptr); 1387} 1388 1389#endif 1390