ASTContext.h revision c3069d618f4661d923cb1b5c4525b082fce73b04
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/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 "clang/AST/UsuallyTinyPtrVector.h" 28#include "llvm/ADT/DenseMap.h" 29#include "llvm/ADT/FoldingSet.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/Support/Allocator.h" 33#include <vector> 34 35namespace llvm { 36 struct fltSemantics; 37 class raw_ostream; 38} 39 40namespace clang { 41 class FileManager; 42 class ASTRecordLayout; 43 class BlockExpr; 44 class CharUnits; 45 class Diagnostic; 46 class Expr; 47 class ExternalASTSource; 48 class ASTMutationListener; 49 class IdentifierTable; 50 class SelectorTable; 51 class SourceManager; 52 class TargetInfo; 53 class CXXABI; 54 // Decls 55 class DeclContext; 56 class CXXMethodDecl; 57 class CXXRecordDecl; 58 class Decl; 59 class FieldDecl; 60 class MangleContext; 61 class ObjCIvarDecl; 62 class ObjCIvarRefExpr; 63 class ObjCPropertyDecl; 64 class RecordDecl; 65 class StoredDeclsMap; 66 class TagDecl; 67 class TemplateTemplateParmDecl; 68 class TemplateTypeParmDecl; 69 class TranslationUnitDecl; 70 class TypeDecl; 71 class TypedefDecl; 72 class UsingDecl; 73 class UsingShadowDecl; 74 class UnresolvedSetIterator; 75 76 namespace Builtin { class Context; } 77 78/// ASTContext - This class holds long-lived AST nodes (such as types and 79/// decls) that can be referred to throughout the semantic analysis of a file. 80class ASTContext { 81 ASTContext &this_() { return *this; } 82 83 mutable std::vector<Type*> Types; 84 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 85 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 86 mutable llvm::FoldingSet<PointerType> PointerTypes; 87 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 88 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 89 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 90 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 91 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 92 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 93 mutable std::vector<VariableArrayType*> VariableArrayTypes; 94 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 95 mutable llvm::FoldingSet<DependentSizedExtVectorType> 96 DependentSizedExtVectorTypes; 97 mutable llvm::FoldingSet<VectorType> VectorTypes; 98 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 99 mutable llvm::FoldingSet<FunctionProtoType> FunctionProtoTypes; 100 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 101 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 102 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 103 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 104 SubstTemplateTypeParmTypes; 105 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 106 SubstTemplateTypeParmPackTypes; 107 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 108 TemplateSpecializationTypes; 109 mutable llvm::FoldingSet<ParenType> ParenTypes; 110 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 111 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 112 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 113 ASTContext&> 114 DependentTemplateSpecializationTypes; 115 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 116 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 117 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 118 llvm::FoldingSet<AttributedType> AttributedTypes; 119 120 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 121 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 122 123 /// \brief The set of nested name specifiers. 124 /// 125 /// This set is managed by the NestedNameSpecifier class. 126 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 127 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 128 friend class NestedNameSpecifier; 129 130 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 131 /// This is lazily created. This is intentionally not serialized. 132 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 133 ASTRecordLayouts; 134 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 135 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 /// \brief Mapping from __block VarDecls to their copy initialization expr. 144 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 145 146 /// \brief Representation of a "canonical" template template parameter that 147 /// is used in canonical template names. 148 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 149 TemplateTemplateParmDecl *Parm; 150 151 public: 152 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 153 : Parm(Parm) { } 154 155 TemplateTemplateParmDecl *getParam() const { return Parm; } 156 157 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 158 159 static void Profile(llvm::FoldingSetNodeID &ID, 160 TemplateTemplateParmDecl *Parm); 161 }; 162 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 163 CanonTemplateTemplateParms; 164 165 TemplateTemplateParmDecl * 166 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 167 168 /// \brief Whether __[u]int128_t identifier is installed. 169 bool IsInt128Installed; 170 171 /// BuiltinVaListType - built-in va list type. 172 /// This is initially null and set by Sema::LazilyCreateBuiltin when 173 /// a builtin that takes a valist is encountered. 174 QualType BuiltinVaListType; 175 176 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 177 QualType ObjCIdTypedefType; 178 179 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 180 QualType ObjCSelTypedefType; 181 182 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 183 QualType ObjCProtoType; 184 const RecordType *ProtoStructType; 185 186 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 187 QualType ObjCClassTypedefType; 188 189 QualType ObjCConstantStringType; 190 mutable RecordDecl *CFConstantStringTypeDecl; 191 192 mutable RecordDecl *NSConstantStringTypeDecl; 193 194 mutable RecordDecl *ObjCFastEnumerationStateTypeDecl; 195 196 /// \brief The type for the C FILE type. 197 TypeDecl *FILEDecl; 198 199 /// \brief The type for the C jmp_buf type. 200 TypeDecl *jmp_bufDecl; 201 202 /// \brief The type for the C sigjmp_buf type. 203 TypeDecl *sigjmp_bufDecl; 204 205 /// \brief Type for the Block descriptor for Blocks CodeGen. 206 mutable RecordDecl *BlockDescriptorType; 207 208 /// \brief Type for the Block descriptor for Blocks CodeGen. 209 mutable RecordDecl *BlockDescriptorExtendedType; 210 211 TypeSourceInfo NullTypeSourceInfo; 212 213 /// \brief Keeps track of all declaration attributes. 214 /// 215 /// Since so few decls have attrs, we keep them in a hash map instead of 216 /// wasting space in the Decl class. 217 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 218 219 /// \brief Keeps track of the static data member templates from which 220 /// static data members of class template specializations were instantiated. 221 /// 222 /// This data structure stores the mapping from instantiations of static 223 /// data members to the static data member representations within the 224 /// class template from which they were instantiated along with the kind 225 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 226 /// 227 /// Given the following example: 228 /// 229 /// \code 230 /// template<typename T> 231 /// struct X { 232 /// static T value; 233 /// }; 234 /// 235 /// template<typename T> 236 /// T X<T>::value = T(17); 237 /// 238 /// int *x = &X<int>::value; 239 /// \endcode 240 /// 241 /// This mapping will contain an entry that maps from the VarDecl for 242 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 243 /// class template X) and will be marked TSK_ImplicitInstantiation. 244 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 245 InstantiatedFromStaticDataMember; 246 247 /// \brief Keeps track of the declaration from which a UsingDecl was 248 /// created during instantiation. The source declaration is always 249 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 250 /// UnresolvedUsingTypenameDecl. 251 /// 252 /// For example: 253 /// \code 254 /// template<typename T> 255 /// struct A { 256 /// void f(); 257 /// }; 258 /// 259 /// template<typename T> 260 /// struct B : A<T> { 261 /// using A<T>::f; 262 /// }; 263 /// 264 /// template struct B<int>; 265 /// \endcode 266 /// 267 /// This mapping will contain an entry that maps from the UsingDecl in 268 /// B<int> to the UnresolvedUsingDecl in B<T>. 269 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 270 271 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 272 InstantiatedFromUsingShadowDecl; 273 274 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 275 276 /// \brief Mapping that stores the methods overridden by a given C++ 277 /// member function. 278 /// 279 /// Since most C++ member functions aren't virtual and therefore 280 /// don't override anything, we store the overridden functions in 281 /// this map on the side rather than within the CXXMethodDecl structure. 282 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 283 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 284 285 TranslationUnitDecl *TUDecl; 286 287 /// SourceMgr - The associated SourceManager object. 288 SourceManager &SourceMgr; 289 290 /// LangOpts - The language options used to create the AST associated with 291 /// this ASTContext object. 292 LangOptions LangOpts; 293 294 /// \brief The allocator used to create AST objects. 295 /// 296 /// AST objects are never destructed; rather, all memory associated with the 297 /// AST objects will be released when the ASTContext itself is destroyed. 298 mutable llvm::BumpPtrAllocator BumpAlloc; 299 300 /// \brief Allocator for partial diagnostics. 301 PartialDiagnostic::StorageAllocator DiagAllocator; 302 303 /// \brief The current C++ ABI. 304 llvm::OwningPtr<CXXABI> ABI; 305 CXXABI *createCXXABI(const TargetInfo &T); 306 307 friend class ASTDeclReader; 308 309public: 310 const TargetInfo &Target; 311 IdentifierTable &Idents; 312 SelectorTable &Selectors; 313 Builtin::Context &BuiltinInfo; 314 mutable DeclarationNameTable DeclarationNames; 315 llvm::OwningPtr<ExternalASTSource> ExternalSource; 316 ASTMutationListener *Listener; 317 clang::PrintingPolicy PrintingPolicy; 318 319 // Typedefs which may be provided defining the structure of Objective-C 320 // pseudo-builtins 321 QualType ObjCIdRedefinitionType; 322 QualType ObjCClassRedefinitionType; 323 QualType ObjCSelRedefinitionType; 324 325 SourceManager& getSourceManager() { return SourceMgr; } 326 const SourceManager& getSourceManager() const { return SourceMgr; } 327 void *Allocate(unsigned Size, unsigned Align = 8) const { 328 return BumpAlloc.Allocate(Size, Align); 329 } 330 void Deallocate(void *Ptr) const { } 331 332 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 333 return DiagAllocator; 334 } 335 336 const LangOptions& getLangOptions() const { return LangOpts; } 337 338 Diagnostic &getDiagnostics() const; 339 340 FullSourceLoc getFullLoc(SourceLocation Loc) const { 341 return FullSourceLoc(Loc,SourceMgr); 342 } 343 344 /// \brief Retrieve the attributes for the given declaration. 345 AttrVec& getDeclAttrs(const Decl *D); 346 347 /// \brief Erase the attributes corresponding to the given declaration. 348 void eraseDeclAttrs(const Decl *D); 349 350 /// \brief If this variable is an instantiated static data member of a 351 /// class template specialization, returns the templated static data member 352 /// from which it was instantiated. 353 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 354 const VarDecl *Var); 355 356 /// \brief Note that the static data member \p Inst is an instantiation of 357 /// the static data member template \p Tmpl of a class template. 358 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 359 TemplateSpecializationKind TSK, 360 SourceLocation PointOfInstantiation = SourceLocation()); 361 362 /// \brief If the given using decl is an instantiation of a 363 /// (possibly unresolved) using decl from a template instantiation, 364 /// return it. 365 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 366 367 /// \brief Remember that the using decl \p Inst is an instantiation 368 /// of the using decl \p Pattern of a class template. 369 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 370 371 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 372 UsingShadowDecl *Pattern); 373 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 374 375 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 376 377 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 378 379 // Access to the set of methods overridden by the given C++ method. 380 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 381 overridden_cxx_method_iterator 382 overridden_methods_begin(const CXXMethodDecl *Method) const; 383 384 overridden_cxx_method_iterator 385 overridden_methods_end(const CXXMethodDecl *Method) const; 386 387 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 388 389 /// \brief Note that the given C++ \p Method overrides the given \p 390 /// Overridden method. 391 void addOverriddenMethod(const CXXMethodDecl *Method, 392 const CXXMethodDecl *Overridden); 393 394 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 395 396 397 // Builtin Types. 398 CanQualType VoidTy; 399 CanQualType BoolTy; 400 CanQualType CharTy; 401 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 402 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 403 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 404 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 405 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 406 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 407 CanQualType FloatTy, DoubleTy, LongDoubleTy; 408 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 409 CanQualType VoidPtrTy, NullPtrTy; 410 CanQualType OverloadTy, UndeducedAutoTy; 411 CanQualType DependentTy; 412 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 413 414 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 415 IdentifierTable &idents, SelectorTable &sels, 416 Builtin::Context &builtins, 417 unsigned size_reserve); 418 419 ~ASTContext(); 420 421 /// \brief Attach an external AST source to the AST context. 422 /// 423 /// The external AST source provides the ability to load parts of 424 /// the abstract syntax tree as needed from some external storage, 425 /// e.g., a precompiled header. 426 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 427 428 /// \brief Retrieve a pointer to the external AST source associated 429 /// with this AST context, if any. 430 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 431 432 /// \brief Attach an AST mutation listener to the AST context. 433 /// 434 /// The AST mutation listener provides the ability to track modifications to 435 /// the abstract syntax tree entities committed after they were initially 436 /// created. 437 void setASTMutationListener(ASTMutationListener *Listener) { 438 this->Listener = Listener; 439 } 440 441 /// \brief Retrieve a pointer to the AST mutation listener associated 442 /// with this AST context, if any. 443 ASTMutationListener *getASTMutationListener() const { return Listener; } 444 445 void PrintStats() const; 446 const std::vector<Type*>& getTypes() const { return Types; } 447 448 //===--------------------------------------------------------------------===// 449 // Type Constructors 450 //===--------------------------------------------------------------------===// 451 452private: 453 /// getExtQualType - Return a type with extended qualifiers. 454 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 455 456 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 457 458public: 459 /// getAddSpaceQualType - Return the uniqued reference to the type for an 460 /// address space qualified type with the specified type and address space. 461 /// The resulting type has a union of the qualifiers from T and the address 462 /// space. If T already has an address space specifier, it is silently 463 /// replaced. 464 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 465 466 /// getObjCGCQualType - Returns the uniqued reference to the type for an 467 /// objc gc qualified type. The retulting type has a union of the qualifiers 468 /// from T and the gc attribute. 469 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 470 471 /// getRestrictType - Returns the uniqued reference to the type for a 472 /// 'restrict' qualified type. The resulting type has a union of the 473 /// qualifiers from T and 'restrict'. 474 QualType getRestrictType(QualType T) const { 475 return T.withFastQualifiers(Qualifiers::Restrict); 476 } 477 478 /// getVolatileType - Returns the uniqued reference to the type for a 479 /// 'volatile' qualified type. The resulting type has a union of the 480 /// qualifiers from T and 'volatile'. 481 QualType getVolatileType(QualType T) const { 482 return T.withFastQualifiers(Qualifiers::Volatile); 483 } 484 485 /// getConstType - Returns the uniqued reference to the type for a 486 /// 'const' qualified type. The resulting type has a union of the 487 /// qualifiers from T and 'const'. 488 /// 489 /// It can be reasonably expected that this will always be 490 /// equivalent to calling T.withConst(). 491 QualType getConstType(QualType T) const { return T.withConst(); } 492 493 /// adjustFunctionType - Change the ExtInfo on a function type. 494 const FunctionType *adjustFunctionType(const FunctionType *Fn, 495 FunctionType::ExtInfo EInfo); 496 497 /// getComplexType - Return the uniqued reference to the type for a complex 498 /// number with the specified element type. 499 QualType getComplexType(QualType T) const; 500 CanQualType getComplexType(CanQualType T) const { 501 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 502 } 503 504 /// getPointerType - Return the uniqued reference to the type for a pointer to 505 /// the specified type. 506 QualType getPointerType(QualType T) const; 507 CanQualType getPointerType(CanQualType T) const { 508 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 509 } 510 511 /// getBlockPointerType - Return the uniqued reference to the type for a block 512 /// of the specified type. 513 QualType getBlockPointerType(QualType T) const; 514 515 /// This gets the struct used to keep track of the descriptor for pointer to 516 /// blocks. 517 QualType getBlockDescriptorType() const; 518 519 // Set the type for a Block descriptor type. 520 void setBlockDescriptorType(QualType T); 521 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 522 QualType getRawBlockdescriptorType() { 523 if (BlockDescriptorType) 524 return getTagDeclType(BlockDescriptorType); 525 return QualType(); 526 } 527 528 /// This gets the struct used to keep track of the extended descriptor for 529 /// pointer to blocks. 530 QualType getBlockDescriptorExtendedType() const; 531 532 // Set the type for a Block descriptor extended type. 533 void setBlockDescriptorExtendedType(QualType T); 534 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 535 /// built. 536 QualType getRawBlockdescriptorExtendedType() const { 537 if (BlockDescriptorExtendedType) 538 return getTagDeclType(BlockDescriptorExtendedType); 539 return QualType(); 540 } 541 542 /// This gets the struct used to keep track of pointer to blocks, complete 543 /// with captured variables. 544 QualType getBlockParmType(bool BlockHasCopyDispose, 545 llvm::SmallVectorImpl<const Expr *> &Layout) const; 546 547 /// This builds the struct used for __block variables. 548 QualType BuildByRefType(llvm::StringRef DeclName, QualType Ty) const; 549 550 /// Returns true iff we need copy/dispose helpers for the given type. 551 bool BlockRequiresCopying(QualType Ty) const; 552 553 /// getLValueReferenceType - Return the uniqued reference to the type for an 554 /// lvalue reference to the specified type. 555 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 556 const; 557 558 /// getRValueReferenceType - Return the uniqued reference to the type for an 559 /// rvalue reference to the specified type. 560 QualType getRValueReferenceType(QualType T) const; 561 562 /// getMemberPointerType - Return the uniqued reference to the type for a 563 /// member pointer to the specified type in the specified class. The class 564 /// is a Type because it could be a dependent name. 565 QualType getMemberPointerType(QualType T, const Type *Cls) const; 566 567 /// getVariableArrayType - Returns a non-unique reference to the type for a 568 /// variable array of the specified element type. 569 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 570 ArrayType::ArraySizeModifier ASM, 571 unsigned EltTypeQuals, 572 SourceRange Brackets) const; 573 574 /// getDependentSizedArrayType - Returns a non-unique reference to 575 /// the type for a dependently-sized array of the specified element 576 /// type. FIXME: We will need these to be uniqued, or at least 577 /// comparable, at some point. 578 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 579 ArrayType::ArraySizeModifier ASM, 580 unsigned EltTypeQuals, 581 SourceRange Brackets) const; 582 583 /// getIncompleteArrayType - Returns a unique reference to the type for a 584 /// incomplete array of the specified element type. 585 QualType getIncompleteArrayType(QualType EltTy, 586 ArrayType::ArraySizeModifier ASM, 587 unsigned EltTypeQuals) const; 588 589 /// getConstantArrayType - Return the unique reference to the type for a 590 /// constant array of the specified element type. 591 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 592 ArrayType::ArraySizeModifier ASM, 593 unsigned EltTypeQuals) const; 594 595 /// getUnknownSizeVariableArrayType - Return a variable array type with 596 /// all variable indices replaced with unknow [*] size. 597 QualType getUnknownSizeVariableArrayType(QualType Ty) const; 598 599 /// getVariableArrayDecayedType - Returns a vla type where known sizes 600 /// are replaced with [*] 601 QualType getVariableArrayDecayedType(QualType Ty) const; 602 603 /// getVectorType - Return the unique reference to a vector type of 604 /// the specified element type and size. VectorType must be a built-in type. 605 QualType getVectorType(QualType VectorType, unsigned NumElts, 606 VectorType::VectorKind VecKind) const; 607 608 /// getExtVectorType - Return the unique reference to an extended vector type 609 /// of the specified element type and size. VectorType must be a built-in 610 /// type. 611 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 612 613 /// getDependentSizedExtVectorType - Returns a non-unique reference to 614 /// the type for a dependently-sized vector of the specified element 615 /// type. FIXME: We will need these to be uniqued, or at least 616 /// comparable, at some point. 617 QualType getDependentSizedExtVectorType(QualType VectorType, 618 Expr *SizeExpr, 619 SourceLocation AttrLoc) const; 620 621 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 622 /// 623 QualType getFunctionNoProtoType(QualType ResultTy, 624 const FunctionType::ExtInfo &Info) const; 625 626 QualType getFunctionNoProtoType(QualType ResultTy) const { 627 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 628 } 629 630 /// getFunctionType - Return a normal function type with a typed 631 /// argument list. 632 QualType getFunctionType(QualType ResultTy, 633 const QualType *Args, unsigned NumArgs, 634 const FunctionProtoType::ExtProtoInfo &EPI) const; 635 636 /// getTypeDeclType - Return the unique reference to the type for 637 /// the specified type declaration. 638 QualType getTypeDeclType(const TypeDecl *Decl, 639 const TypeDecl *PrevDecl = 0) const { 640 assert(Decl && "Passed null for Decl param"); 641 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 642 643 if (PrevDecl) { 644 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 645 Decl->TypeForDecl = PrevDecl->TypeForDecl; 646 return QualType(PrevDecl->TypeForDecl, 0); 647 } 648 649 return getTypeDeclTypeSlow(Decl); 650 } 651 652 /// getTypedefType - Return the unique reference to the type for the 653 /// specified typename decl. 654 QualType getTypedefType(const TypedefDecl *Decl, QualType Canon = QualType()) 655 const; 656 657 QualType getRecordType(const RecordDecl *Decl) const; 658 659 QualType getEnumType(const EnumDecl *Decl) const; 660 661 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 662 663 QualType getAttributedType(AttributedType::Kind attrKind, 664 QualType modifiedType, 665 QualType equivalentType); 666 667 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 668 QualType Replacement) const; 669 QualType getSubstTemplateTypeParmPackType( 670 const TemplateTypeParmType *Replaced, 671 const TemplateArgument &ArgPack); 672 673 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 674 bool ParameterPack, 675 IdentifierInfo *Name = 0) const; 676 677 QualType getTemplateSpecializationType(TemplateName T, 678 const TemplateArgument *Args, 679 unsigned NumArgs, 680 QualType Canon = QualType()) const; 681 682 QualType getCanonicalTemplateSpecializationType(TemplateName T, 683 const TemplateArgument *Args, 684 unsigned NumArgs) const; 685 686 QualType getTemplateSpecializationType(TemplateName T, 687 const TemplateArgumentListInfo &Args, 688 QualType Canon = QualType()) const; 689 690 TypeSourceInfo * 691 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 692 const TemplateArgumentListInfo &Args, 693 QualType Canon = QualType()) const; 694 695 QualType getParenType(QualType NamedType) const; 696 697 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 698 NestedNameSpecifier *NNS, 699 QualType NamedType) const; 700 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 701 NestedNameSpecifier *NNS, 702 const IdentifierInfo *Name, 703 QualType Canon = QualType()) const; 704 705 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 706 NestedNameSpecifier *NNS, 707 const IdentifierInfo *Name, 708 const TemplateArgumentListInfo &Args) const; 709 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 710 NestedNameSpecifier *NNS, 711 const IdentifierInfo *Name, 712 unsigned NumArgs, 713 const TemplateArgument *Args) const; 714 715 QualType getPackExpansionType(QualType Pattern); 716 717 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const; 718 719 QualType getObjCObjectType(QualType Base, 720 ObjCProtocolDecl * const *Protocols, 721 unsigned NumProtocols) const; 722 723 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 724 /// for the given ObjCObjectType. 725 QualType getObjCObjectPointerType(QualType OIT) const; 726 727 /// getTypeOfType - GCC extension. 728 QualType getTypeOfExprType(Expr *e) const; 729 QualType getTypeOfType(QualType t) const; 730 731 /// getDecltypeType - C++0x decltype. 732 QualType getDecltypeType(Expr *e) const; 733 734 /// getTagDeclType - Return the unique reference to the type for the 735 /// specified TagDecl (struct/union/class/enum) decl. 736 QualType getTagDeclType(const TagDecl *Decl) const; 737 738 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 739 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 740 CanQualType getSizeType() const; 741 742 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 743 /// returns a type compatible with the type defined in <stddef.h> as defined 744 /// by the target. 745 QualType getWCharType() const { return WCharTy; } 746 747 /// getSignedWCharType - Return the type of "signed wchar_t". 748 /// Used when in C++, as a GCC extension. 749 QualType getSignedWCharType() const; 750 751 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 752 /// Used when in C++, as a GCC extension. 753 QualType getUnsignedWCharType() const; 754 755 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 756 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 757 QualType getPointerDiffType() const; 758 759 // getCFConstantStringType - Return the C structure type used to represent 760 // constant CFStrings. 761 QualType getCFConstantStringType() const; 762 763 // getNSConstantStringType - Return the C structure type used to represent 764 // constant NSStrings. 765 QualType getNSConstantStringType() const; 766 /// Get the structure type used to representation NSStrings, or NULL 767 /// if it hasn't yet been built. 768 QualType getRawNSConstantStringType() const { 769 if (NSConstantStringTypeDecl) 770 return getTagDeclType(NSConstantStringTypeDecl); 771 return QualType(); 772 } 773 void setNSConstantStringType(QualType T); 774 775 776 /// Get the structure type used to representation CFStrings, or NULL 777 /// if it hasn't yet been built. 778 QualType getRawCFConstantStringType() const { 779 if (CFConstantStringTypeDecl) 780 return getTagDeclType(CFConstantStringTypeDecl); 781 return QualType(); 782 } 783 void setCFConstantStringType(QualType T); 784 785 // This setter/getter represents the ObjC type for an NSConstantString. 786 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 787 QualType getObjCConstantStringInterface() const { 788 return ObjCConstantStringType; 789 } 790 791 //// This gets the struct used to keep track of fast enumerations. 792 QualType getObjCFastEnumerationStateType() const; 793 794 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 795 /// been built. 796 QualType getRawObjCFastEnumerationStateType() const { 797 if (ObjCFastEnumerationStateTypeDecl) 798 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 799 return QualType(); 800 } 801 802 void setObjCFastEnumerationStateType(QualType T); 803 804 /// \brief Set the type for the C FILE type. 805 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 806 807 /// \brief Retrieve the C FILE type. 808 QualType getFILEType() const { 809 if (FILEDecl) 810 return getTypeDeclType(FILEDecl); 811 return QualType(); 812 } 813 814 /// \brief Set the type for the C jmp_buf type. 815 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 816 this->jmp_bufDecl = jmp_bufDecl; 817 } 818 819 /// \brief Retrieve the C jmp_buf type. 820 QualType getjmp_bufType() const { 821 if (jmp_bufDecl) 822 return getTypeDeclType(jmp_bufDecl); 823 return QualType(); 824 } 825 826 /// \brief Set the type for the C sigjmp_buf type. 827 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 828 this->sigjmp_bufDecl = sigjmp_bufDecl; 829 } 830 831 /// \brief Retrieve the C sigjmp_buf type. 832 QualType getsigjmp_bufType() const { 833 if (sigjmp_bufDecl) 834 return getTypeDeclType(sigjmp_bufDecl); 835 return QualType(); 836 } 837 838 /// getObjCEncodingForType - Emit the ObjC type encoding for the 839 /// given type into \arg S. If \arg NameFields is specified then 840 /// record field names are also encoded. 841 void getObjCEncodingForType(QualType t, std::string &S, 842 const FieldDecl *Field=0) const; 843 844 void getLegacyIntegralTypeEncoding(QualType &t) const; 845 846 // Put the string version of type qualifiers into S. 847 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 848 std::string &S) const; 849 850 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 851 //function. This is in the same format as Objective-C method encodings. 852 void getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 853 854 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 855 /// declaration. 856 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S) 857 const; 858 859 /// getObjCEncodingForBlockDecl - Return the encoded type for this block 860 /// declaration. 861 void getObjCEncodingForBlock(const BlockExpr *Expr, std::string& S) const; 862 863 /// getObjCEncodingForPropertyDecl - Return the encoded type for 864 /// this method declaration. If non-NULL, Container must be either 865 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 866 /// only be NULL when getting encodings for protocol properties. 867 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 868 const Decl *Container, 869 std::string &S) const; 870 871 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 872 ObjCProtocolDecl *rProto) const; 873 874 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 875 /// purpose in characters. 876 CharUnits getObjCEncodingTypeSize(QualType t) const; 877 878 /// \brief Whether __[u]int128_t identifier is installed. 879 bool isInt128Installed() const { return IsInt128Installed; } 880 void setInt128Installed() { IsInt128Installed = true; } 881 882 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 883 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 884 QualType getObjCIdType() const { return ObjCIdTypedefType; } 885 void setObjCIdType(QualType T); 886 887 void setObjCSelType(QualType T); 888 QualType getObjCSelType() const { return ObjCSelTypedefType; } 889 890 void setObjCProtoType(QualType QT); 891 QualType getObjCProtoType() const { return ObjCProtoType; } 892 893 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 894 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 895 /// struct. 896 QualType getObjCClassType() const { return ObjCClassTypedefType; } 897 void setObjCClassType(QualType T); 898 899 void setBuiltinVaListType(QualType T); 900 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 901 902 /// getCVRQualifiedType - Returns a type with additional const, 903 /// volatile, or restrict qualifiers. 904 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 905 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 906 } 907 908 /// getQualifiedType - Returns a type with additional qualifiers. 909 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 910 if (!Qs.hasNonFastQualifiers()) 911 return T.withFastQualifiers(Qs.getFastQualifiers()); 912 QualifierCollector Qc(Qs); 913 const Type *Ptr = Qc.strip(T); 914 return getExtQualType(Ptr, Qc); 915 } 916 917 /// getQualifiedType - Returns a type with additional qualifiers. 918 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 919 if (!Qs.hasNonFastQualifiers()) 920 return QualType(T, Qs.getFastQualifiers()); 921 return getExtQualType(T, Qs); 922 } 923 924 DeclarationNameInfo getNameForTemplate(TemplateName Name, 925 SourceLocation NameLoc) const; 926 927 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 928 UnresolvedSetIterator End) const; 929 930 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 931 bool TemplateKeyword, 932 TemplateDecl *Template) const; 933 934 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 935 const IdentifierInfo *Name) const; 936 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 937 OverloadedOperatorKind Operator) const; 938 939 enum GetBuiltinTypeError { 940 GE_None, //< No error 941 GE_Missing_stdio, //< Missing a type from <stdio.h> 942 GE_Missing_setjmp //< Missing a type from <setjmp.h> 943 }; 944 945 /// GetBuiltinType - Return the type for the specified builtin. If 946 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 947 /// arguments to the builtin that are required to be integer constant 948 /// expressions. 949 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 950 unsigned *IntegerConstantArgs = 0) const; 951 952private: 953 CanQualType getFromTargetType(unsigned Type) const; 954 955 //===--------------------------------------------------------------------===// 956 // Type Predicates. 957 //===--------------------------------------------------------------------===// 958 959public: 960 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 961 /// garbage collection attribute. 962 /// 963 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 964 965 /// areCompatibleVectorTypes - Return true if the given vector types 966 /// are of the same unqualified type or if they are equivalent to the same 967 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 968 /// Neon) types. 969 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 970 971 /// isObjCNSObjectType - Return true if this is an NSObject object with 972 /// its NSObject attribute set. 973 bool isObjCNSObjectType(QualType Ty) const; 974 975 //===--------------------------------------------------------------------===// 976 // Type Sizing and Analysis 977 //===--------------------------------------------------------------------===// 978 979 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 980 /// scalar floating point type. 981 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 982 983 /// getTypeInfo - Get the size and alignment of the specified complete type in 984 /// bits. 985 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 986 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 987 return getTypeInfo(T.getTypePtr()); 988 } 989 990 /// getTypeSize - Return the size of the specified type, in bits. This method 991 /// does not work on incomplete types. 992 uint64_t getTypeSize(QualType T) const { 993 return getTypeInfo(T).first; 994 } 995 uint64_t getTypeSize(const Type *T) const { 996 return getTypeInfo(T).first; 997 } 998 999 /// getCharWidth - Return the size of the character type, in bits 1000 uint64_t getCharWidth() const { 1001 return getTypeSize(CharTy); 1002 } 1003 1004 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1005 /// This method does not work on incomplete types. 1006 CharUnits getTypeSizeInChars(QualType T) const; 1007 CharUnits getTypeSizeInChars(const Type *T) const; 1008 1009 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1010 /// This method does not work on incomplete types. 1011 unsigned getTypeAlign(QualType T) const { 1012 return getTypeInfo(T).second; 1013 } 1014 unsigned getTypeAlign(const Type *T) const { 1015 return getTypeInfo(T).second; 1016 } 1017 1018 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1019 /// characters. This method does not work on incomplete types. 1020 CharUnits getTypeAlignInChars(QualType T) const; 1021 CharUnits getTypeAlignInChars(const Type *T) const; 1022 1023 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T); 1024 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T); 1025 1026 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1027 /// type for the current target in bits. This can be different than the ABI 1028 /// alignment in cases where it is beneficial for performance to overalign 1029 /// a data type. 1030 unsigned getPreferredTypeAlign(const Type *T) const; 1031 1032 /// getDeclAlign - Return a conservative estimate of the alignment of 1033 /// the specified decl. Note that bitfields do not have a valid alignment, so 1034 /// this method will assert on them. 1035 /// If @p RefAsPointee, references are treated like their underlying type 1036 /// (for alignof), else they're treated like pointers (for CodeGen). 1037 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1038 1039 /// getASTRecordLayout - Get or compute information about the layout of the 1040 /// specified record (struct/union/class), which indicates its size and field 1041 /// position information. 1042 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1043 1044 /// getASTObjCInterfaceLayout - Get or compute information about the 1045 /// layout of the specified Objective-C interface. 1046 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1047 const; 1048 1049 void DumpRecordLayout(const RecordDecl *RD, llvm::raw_ostream &OS) const; 1050 1051 /// getASTObjCImplementationLayout - Get or compute information about 1052 /// the layout of the specified Objective-C implementation. This may 1053 /// differ from the interface if synthesized ivars are present. 1054 const ASTRecordLayout & 1055 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1056 1057 /// getKeyFunction - Get the key function for the given record decl, or NULL 1058 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1059 /// section 5.2.3: 1060 /// 1061 /// ...the first non-pure virtual function that is not inline at the point 1062 /// of class definition. 1063 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1064 1065 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1066 1067 MangleContext *createMangleContext(); 1068 1069 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1070 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) 1071 const; 1072 1073 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1074 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const; 1075 1076 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1077 void CollectInheritedProtocols(const Decl *CDecl, 1078 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1079 1080 //===--------------------------------------------------------------------===// 1081 // Type Operators 1082 //===--------------------------------------------------------------------===// 1083 1084 /// getCanonicalType - Return the canonical (structural) type corresponding to 1085 /// the specified potentially non-canonical type. The non-canonical version 1086 /// of a type may have many "decorated" versions of types. Decorators can 1087 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1088 /// to be free of any of these, allowing two canonical types to be compared 1089 /// for exact equality with a simple pointer comparison. 1090 CanQualType getCanonicalType(QualType T) const; 1091 const Type *getCanonicalType(const Type *T) const { 1092 return T->getCanonicalTypeInternal().getTypePtr(); 1093 } 1094 1095 /// getCanonicalParamType - Return the canonical parameter type 1096 /// corresponding to the specific potentially non-canonical one. 1097 /// Qualifiers are stripped off, functions are turned into function 1098 /// pointers, and arrays decay one level into pointers. 1099 CanQualType getCanonicalParamType(QualType T) const; 1100 1101 /// \brief Determine whether the given types are equivalent. 1102 bool hasSameType(QualType T1, QualType T2) { 1103 return getCanonicalType(T1) == getCanonicalType(T2); 1104 } 1105 1106 /// \brief Returns this type as a completely-unqualified array type, 1107 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1108 /// sugaring from the types, similar to the behavior of 1109 /// QualType::getUnqualifiedType(). 1110 /// 1111 /// \param T is the qualified type, which may be an ArrayType 1112 /// 1113 /// \param Quals will receive the full set of qualifiers that were 1114 /// applied to the array. 1115 /// 1116 /// \returns if this is an array type, the completely unqualified array type 1117 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1118 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1119 1120 /// \brief Determine whether the given types are equivalent after 1121 /// cvr-qualifiers have been removed. 1122 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1123 CanQualType CT1 = getCanonicalType(T1); 1124 CanQualType CT2 = getCanonicalType(T2); 1125 1126 Qualifiers Quals; 1127 QualType UnqualT1 = getUnqualifiedArrayType(CT1, Quals); 1128 QualType UnqualT2 = getUnqualifiedArrayType(CT2, Quals); 1129 return UnqualT1 == UnqualT2; 1130 } 1131 1132 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1133 1134 /// \brief Retrieves the "canonical" nested name specifier for a 1135 /// given nested name specifier. 1136 /// 1137 /// The canonical nested name specifier is a nested name specifier 1138 /// that uniquely identifies a type or namespace within the type 1139 /// system. For example, given: 1140 /// 1141 /// \code 1142 /// namespace N { 1143 /// struct S { 1144 /// template<typename T> struct X { typename T* type; }; 1145 /// }; 1146 /// } 1147 /// 1148 /// template<typename T> struct Y { 1149 /// typename N::S::X<T>::type member; 1150 /// }; 1151 /// \endcode 1152 /// 1153 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1154 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1155 /// by declarations in the type system and the canonical type for 1156 /// the template type parameter 'T' is template-param-0-0. 1157 NestedNameSpecifier * 1158 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1159 1160 /// \brief Retrieves the default calling convention to use for 1161 /// C++ instance methods. 1162 CallingConv getDefaultMethodCallConv(); 1163 1164 /// \brief Retrieves the canonical representation of the given 1165 /// calling convention. 1166 CallingConv getCanonicalCallConv(CallingConv CC) const { 1167 if (CC == CC_C) 1168 return CC_Default; 1169 return CC; 1170 } 1171 1172 /// \brief Determines whether two calling conventions name the same 1173 /// calling convention. 1174 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1175 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1176 } 1177 1178 /// \brief Retrieves the "canonical" template name that refers to a 1179 /// given template. 1180 /// 1181 /// The canonical template name is the simplest expression that can 1182 /// be used to refer to a given template. For most templates, this 1183 /// expression is just the template declaration itself. For example, 1184 /// the template std::vector can be referred to via a variety of 1185 /// names---std::vector, ::std::vector, vector (if vector is in 1186 /// scope), etc.---but all of these names map down to the same 1187 /// TemplateDecl, which is used to form the canonical template name. 1188 /// 1189 /// Dependent template names are more interesting. Here, the 1190 /// template name could be something like T::template apply or 1191 /// std::allocator<T>::template rebind, where the nested name 1192 /// specifier itself is dependent. In this case, the canonical 1193 /// template name uses the shortest form of the dependent 1194 /// nested-name-specifier, which itself contains all canonical 1195 /// types, values, and templates. 1196 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1197 1198 /// \brief Determine whether the given template names refer to the same 1199 /// template. 1200 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1201 1202 /// \brief Retrieve the "canonical" template argument. 1203 /// 1204 /// The canonical template argument is the simplest template argument 1205 /// (which may be a type, value, expression, or declaration) that 1206 /// expresses the value of the argument. 1207 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1208 const; 1209 1210 /// Type Query functions. If the type is an instance of the specified class, 1211 /// return the Type pointer for the underlying maximally pretty type. This 1212 /// is a member of ASTContext because this may need to do some amount of 1213 /// canonicalization, e.g. to move type qualifiers into the element type. 1214 const ArrayType *getAsArrayType(QualType T) const; 1215 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1216 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1217 } 1218 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1219 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1220 } 1221 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1222 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1223 } 1224 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1225 const { 1226 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1227 } 1228 1229 /// getBaseElementType - Returns the innermost element type of an array type. 1230 /// For example, will return "int" for int[m][n] 1231 QualType getBaseElementType(const ArrayType *VAT) const; 1232 1233 /// getBaseElementType - Returns the innermost element type of a type 1234 /// (which needn't actually be an array type). 1235 QualType getBaseElementType(QualType QT) const; 1236 1237 /// getConstantArrayElementCount - Returns number of constant array elements. 1238 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1239 1240 /// getArrayDecayedType - Return the properly qualified result of decaying the 1241 /// specified array type to a pointer. This operation is non-trivial when 1242 /// handling typedefs etc. The canonical type of "T" must be an array type, 1243 /// this returns a pointer to a properly qualified element of the array. 1244 /// 1245 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1246 QualType getArrayDecayedType(QualType T) const; 1247 1248 /// getPromotedIntegerType - Returns the type that Promotable will 1249 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1250 /// integer type. 1251 QualType getPromotedIntegerType(QualType PromotableType) const; 1252 1253 /// \brief Whether this is a promotable bitfield reference according 1254 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1255 /// 1256 /// \returns the type this bit-field will promote to, or NULL if no 1257 /// promotion occurs. 1258 QualType isPromotableBitField(Expr *E) const; 1259 1260 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1261 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1262 /// LHS < RHS, return -1. 1263 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1264 1265 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1266 /// point types, ignoring the domain of the type (i.e. 'double' == 1267 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1268 /// LHS < RHS, return -1. 1269 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1270 1271 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1272 /// point or a complex type (based on typeDomain/typeSize). 1273 /// 'typeDomain' is a real floating point or complex type. 1274 /// 'typeSize' is a real floating point or complex type. 1275 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1276 QualType typeDomain) const; 1277 1278private: 1279 // Helper for integer ordering 1280 unsigned getIntegerRank(Type* T) const; 1281 1282public: 1283 1284 //===--------------------------------------------------------------------===// 1285 // Type Compatibility Predicates 1286 //===--------------------------------------------------------------------===// 1287 1288 /// Compatibility predicates used to check assignment expressions. 1289 bool typesAreCompatible(QualType T1, QualType T2, 1290 bool CompareUnqualified = false); // C99 6.2.7p1 1291 1292 bool typesAreBlockPointerCompatible(QualType, QualType); 1293 1294 bool isObjCIdType(QualType T) const { 1295 return T == ObjCIdTypedefType; 1296 } 1297 bool isObjCClassType(QualType T) const { 1298 return T == ObjCClassTypedefType; 1299 } 1300 bool isObjCSelType(QualType T) const { 1301 return T == ObjCSelTypedefType; 1302 } 1303 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1304 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1305 bool ForCompare); 1306 1307 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1308 1309 // Check the safety of assignment from LHS to RHS 1310 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1311 const ObjCObjectPointerType *RHSOPT); 1312 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1313 const ObjCObjectType *RHS); 1314 bool canAssignObjCInterfacesInBlockPointer( 1315 const ObjCObjectPointerType *LHSOPT, 1316 const ObjCObjectPointerType *RHSOPT); 1317 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1318 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1319 const ObjCObjectPointerType *RHSOPT); 1320 bool canBindObjCObjectType(QualType To, QualType From); 1321 1322 // Functions for calculating composite types 1323 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1324 bool Unqualified = false); 1325 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1326 bool Unqualified = false); 1327 QualType mergeFunctionArgumentTypes(QualType, QualType, 1328 bool OfBlockPointer=false, 1329 bool Unqualified = false); 1330 QualType mergeTransparentUnionType(QualType, QualType, 1331 bool OfBlockPointer=false, 1332 bool Unqualified = false); 1333 1334 QualType mergeObjCGCQualifiers(QualType, QualType); 1335 1336 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1337 ObjCLayouts[CD] = 0; 1338 } 1339 1340 //===--------------------------------------------------------------------===// 1341 // Integer Predicates 1342 //===--------------------------------------------------------------------===// 1343 1344 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1345 // of bits in an integer type excluding any padding bits. 1346 unsigned getIntWidth(QualType T) const; 1347 1348 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1349 // unsigned integer type. This method takes a signed type, and returns the 1350 // corresponding unsigned integer type. 1351 QualType getCorrespondingUnsignedType(QualType T); 1352 1353 //===--------------------------------------------------------------------===// 1354 // Type Iterators. 1355 //===--------------------------------------------------------------------===// 1356 1357 typedef std::vector<Type*>::iterator type_iterator; 1358 typedef std::vector<Type*>::const_iterator const_type_iterator; 1359 1360 type_iterator types_begin() { return Types.begin(); } 1361 type_iterator types_end() { return Types.end(); } 1362 const_type_iterator types_begin() const { return Types.begin(); } 1363 const_type_iterator types_end() const { return Types.end(); } 1364 1365 //===--------------------------------------------------------------------===// 1366 // Integer Values 1367 //===--------------------------------------------------------------------===// 1368 1369 /// MakeIntValue - Make an APSInt of the appropriate width and 1370 /// signedness for the given \arg Value and integer \arg Type. 1371 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1372 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1373 Res = Value; 1374 return Res; 1375 } 1376 1377 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1378 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1379 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1380 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1381 1382 /// \brief Set the implementation of ObjCInterfaceDecl. 1383 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1384 ObjCImplementationDecl *ImplD); 1385 /// \brief Set the implementation of ObjCCategoryDecl. 1386 void setObjCImplementation(ObjCCategoryDecl *CatD, 1387 ObjCCategoryImplDecl *ImplD); 1388 1389 /// \brief Set the copy inialization expression of a block var decl. 1390 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1391 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1392 /// none exists. 1393 Expr *getBlockVarCopyInits(const VarDecl*VD); 1394 1395 /// \brief Allocate an uninitialized TypeSourceInfo. 1396 /// 1397 /// The caller should initialize the memory held by TypeSourceInfo using 1398 /// the TypeLoc wrappers. 1399 /// 1400 /// \param T the type that will be the basis for type source info. This type 1401 /// should refer to how the declarator was written in source code, not to 1402 /// what type semantic analysis resolved the declarator to. 1403 /// 1404 /// \param Size the size of the type info to create, or 0 if the size 1405 /// should be calculated based on the type. 1406 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1407 1408 /// \brief Allocate a TypeSourceInfo where all locations have been 1409 /// initialized to a given location, which defaults to the empty 1410 /// location. 1411 TypeSourceInfo * 1412 getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation()); 1413 1414 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1415 1416 /// \brief Add a deallocation callback that will be invoked when the 1417 /// ASTContext is destroyed. 1418 /// 1419 /// \brief Callback A callback function that will be invoked on destruction. 1420 /// 1421 /// \brief Data Pointer data that will be provided to the callback function 1422 /// when it is called. 1423 void AddDeallocation(void (*Callback)(void*), void *Data); 1424 1425 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1426 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1427 1428 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1429 /// lazily, only when used; this is only relevant for function or file scoped 1430 /// var definitions. 1431 /// 1432 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1433 /// it is not used. 1434 bool DeclMustBeEmitted(const Decl *D); 1435 1436 //===--------------------------------------------------------------------===// 1437 // Statistics 1438 //===--------------------------------------------------------------------===// 1439 1440 /// \brief The number of implicitly-declared default constructors. 1441 static unsigned NumImplicitDefaultConstructors; 1442 1443 /// \brief The number of implicitly-declared default constructors for 1444 /// which declarations were built. 1445 static unsigned NumImplicitDefaultConstructorsDeclared; 1446 1447 /// \brief The number of implicitly-declared copy constructors. 1448 static unsigned NumImplicitCopyConstructors; 1449 1450 /// \brief The number of implicitly-declared copy constructors for 1451 /// which declarations were built. 1452 static unsigned NumImplicitCopyConstructorsDeclared; 1453 1454 /// \brief The number of implicitly-declared copy assignment operators. 1455 static unsigned NumImplicitCopyAssignmentOperators; 1456 1457 /// \brief The number of implicitly-declared copy assignment operators for 1458 /// which declarations were built. 1459 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1460 1461 /// \brief The number of implicitly-declared destructors. 1462 static unsigned NumImplicitDestructors; 1463 1464 /// \brief The number of implicitly-declared destructors for which 1465 /// declarations were built. 1466 static unsigned NumImplicitDestructorsDeclared; 1467 1468private: 1469 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1470 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1471 1472 void InitBuiltinTypes(); 1473 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1474 1475 // Return the ObjC type encoding for a given type. 1476 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1477 bool ExpandPointedToStructures, 1478 bool ExpandStructures, 1479 const FieldDecl *Field, 1480 bool OutermostType = false, 1481 bool EncodingProperty = false) const; 1482 1483 const ASTRecordLayout & 1484 getObjCLayout(const ObjCInterfaceDecl *D, 1485 const ObjCImplementationDecl *Impl) const; 1486 1487private: 1488 /// \brief A set of deallocations that should be performed when the 1489 /// ASTContext is destroyed. 1490 llvm::SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1491 1492 // FIXME: This currently contains the set of StoredDeclMaps used 1493 // by DeclContext objects. This probably should not be in ASTContext, 1494 // but we include it here so that ASTContext can quickly deallocate them. 1495 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1496 1497 /// \brief A counter used to uniquely identify "blocks". 1498 mutable unsigned int UniqueBlockByRefTypeID; 1499 mutable unsigned int UniqueBlockParmTypeID; 1500 1501 friend class DeclContext; 1502 friend class DeclarationNameTable; 1503 void ReleaseDeclContextMaps(); 1504}; 1505 1506/// @brief Utility function for constructing a nullary selector. 1507static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1508 IdentifierInfo* II = &Ctx.Idents.get(name); 1509 return Ctx.Selectors.getSelector(0, &II); 1510} 1511 1512/// @brief Utility function for constructing an unary selector. 1513static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1514 IdentifierInfo* II = &Ctx.Idents.get(name); 1515 return Ctx.Selectors.getSelector(1, &II); 1516} 1517 1518} // end namespace clang 1519 1520// operator new and delete aren't allowed inside namespaces. 1521// The throw specifications are mandated by the standard. 1522/// @brief Placement new for using the ASTContext's allocator. 1523/// 1524/// This placement form of operator new uses the ASTContext's allocator for 1525/// obtaining memory. It is a non-throwing new, which means that it returns 1526/// null on error. (If that is what the allocator does. The current does, so if 1527/// this ever changes, this operator will have to be changed, too.) 1528/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1529/// @code 1530/// // Default alignment (8) 1531/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1532/// // Specific alignment 1533/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1534/// @endcode 1535/// Please note that you cannot use delete on the pointer; it must be 1536/// deallocated using an explicit destructor call followed by 1537/// @c Context.Deallocate(Ptr). 1538/// 1539/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1540/// @param C The ASTContext that provides the allocator. 1541/// @param Alignment The alignment of the allocated memory (if the underlying 1542/// allocator supports it). 1543/// @return The allocated memory. Could be NULL. 1544inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1545 size_t Alignment) throw () { 1546 return C.Allocate(Bytes, Alignment); 1547} 1548/// @brief Placement delete companion to the new above. 1549/// 1550/// This operator is just a companion to the new above. There is no way of 1551/// invoking it directly; see the new operator for more details. This operator 1552/// is called implicitly by the compiler if a placement new expression using 1553/// the ASTContext throws in the object constructor. 1554inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1555 throw () { 1556 C.Deallocate(Ptr); 1557} 1558 1559/// This placement form of operator new[] uses the ASTContext's allocator for 1560/// obtaining memory. It is a non-throwing new[], which means that it returns 1561/// null on error. 1562/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1563/// @code 1564/// // Default alignment (8) 1565/// char *data = new (Context) char[10]; 1566/// // Specific alignment 1567/// char *data = new (Context, 4) char[10]; 1568/// @endcode 1569/// Please note that you cannot use delete on the pointer; it must be 1570/// deallocated using an explicit destructor call followed by 1571/// @c Context.Deallocate(Ptr). 1572/// 1573/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1574/// @param C The ASTContext that provides the allocator. 1575/// @param Alignment The alignment of the allocated memory (if the underlying 1576/// allocator supports it). 1577/// @return The allocated memory. Could be NULL. 1578inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1579 size_t Alignment = 8) throw () { 1580 return C.Allocate(Bytes, Alignment); 1581} 1582 1583/// @brief Placement delete[] companion to the new[] above. 1584/// 1585/// This operator is just a companion to the new[] above. There is no way of 1586/// invoking it directly; see the new[] operator for more details. This operator 1587/// is called implicitly by the compiler if a placement new[] expression using 1588/// the ASTContext throws in the object constructor. 1589inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1590 throw () { 1591 C.Deallocate(Ptr); 1592} 1593 1594#endif 1595