ASTContext.h revision 483b9f3bc05c5409e2c6643f1c9d91e21c8ff9d2
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 mutable llvm::FoldingSet<AutoType> AutoTypes; 119 llvm::FoldingSet<AttributedType> AttributedTypes; 120 121 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 122 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 123 mutable llvm::FoldingSet<SubstTemplateTemplateParmPackStorage> 124 SubstTemplateTemplateParmPacks; 125 126 /// \brief The set of nested name specifiers. 127 /// 128 /// This set is managed by the NestedNameSpecifier class. 129 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 130 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 131 friend class NestedNameSpecifier; 132 133 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 134 /// This is lazily created. This is intentionally not serialized. 135 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 136 ASTRecordLayouts; 137 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 138 ObjCLayouts; 139 140 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 141 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 142 143 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 144 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 145 146 /// \brief Mapping from __block VarDecls to their copy initialization expr. 147 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 148 149 /// \brief Representation of a "canonical" template template parameter that 150 /// is used in canonical template names. 151 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 152 TemplateTemplateParmDecl *Parm; 153 154 public: 155 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 156 : Parm(Parm) { } 157 158 TemplateTemplateParmDecl *getParam() const { return Parm; } 159 160 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 161 162 static void Profile(llvm::FoldingSetNodeID &ID, 163 TemplateTemplateParmDecl *Parm); 164 }; 165 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 166 CanonTemplateTemplateParms; 167 168 TemplateTemplateParmDecl * 169 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 170 171 /// \brief Whether __[u]int128_t identifier is installed. 172 bool IsInt128Installed; 173 174 /// BuiltinVaListType - built-in va list type. 175 /// This is initially null and set by Sema::LazilyCreateBuiltin when 176 /// a builtin that takes a valist is encountered. 177 QualType BuiltinVaListType; 178 179 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 180 QualType ObjCIdTypedefType; 181 182 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 183 QualType ObjCSelTypedefType; 184 185 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 186 QualType ObjCProtoType; 187 const RecordType *ProtoStructType; 188 189 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 190 QualType ObjCClassTypedefType; 191 192 QualType ObjCConstantStringType; 193 mutable RecordDecl *CFConstantStringTypeDecl; 194 195 mutable RecordDecl *NSConstantStringTypeDecl; 196 197 mutable RecordDecl *ObjCFastEnumerationStateTypeDecl; 198 199 /// \brief The type for the C FILE type. 200 TypeDecl *FILEDecl; 201 202 /// \brief The type for the C jmp_buf type. 203 TypeDecl *jmp_bufDecl; 204 205 /// \brief The type for the C sigjmp_buf type. 206 TypeDecl *sigjmp_bufDecl; 207 208 /// \brief Type for the Block descriptor for Blocks CodeGen. 209 mutable RecordDecl *BlockDescriptorType; 210 211 /// \brief Type for the Block descriptor for Blocks CodeGen. 212 mutable RecordDecl *BlockDescriptorExtendedType; 213 214 /// \brief Declaration for the CUDA cudaConfigureCall function. 215 FunctionDecl *cudaConfigureCallDecl; 216 217 TypeSourceInfo NullTypeSourceInfo; 218 219 /// \brief Keeps track of all declaration attributes. 220 /// 221 /// Since so few decls have attrs, we keep them in a hash map instead of 222 /// wasting space in the Decl class. 223 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 224 225 /// \brief Keeps track of the static data member templates from which 226 /// static data members of class template specializations were instantiated. 227 /// 228 /// This data structure stores the mapping from instantiations of static 229 /// data members to the static data member representations within the 230 /// class template from which they were instantiated along with the kind 231 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 232 /// 233 /// Given the following example: 234 /// 235 /// \code 236 /// template<typename T> 237 /// struct X { 238 /// static T value; 239 /// }; 240 /// 241 /// template<typename T> 242 /// T X<T>::value = T(17); 243 /// 244 /// int *x = &X<int>::value; 245 /// \endcode 246 /// 247 /// This mapping will contain an entry that maps from the VarDecl for 248 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 249 /// class template X) and will be marked TSK_ImplicitInstantiation. 250 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 251 InstantiatedFromStaticDataMember; 252 253 /// \brief Keeps track of the declaration from which a UsingDecl was 254 /// created during instantiation. The source declaration is always 255 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 256 /// UnresolvedUsingTypenameDecl. 257 /// 258 /// For example: 259 /// \code 260 /// template<typename T> 261 /// struct A { 262 /// void f(); 263 /// }; 264 /// 265 /// template<typename T> 266 /// struct B : A<T> { 267 /// using A<T>::f; 268 /// }; 269 /// 270 /// template struct B<int>; 271 /// \endcode 272 /// 273 /// This mapping will contain an entry that maps from the UsingDecl in 274 /// B<int> to the UnresolvedUsingDecl in B<T>. 275 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 276 277 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 278 InstantiatedFromUsingShadowDecl; 279 280 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 281 282 /// \brief Mapping that stores the methods overridden by a given C++ 283 /// member function. 284 /// 285 /// Since most C++ member functions aren't virtual and therefore 286 /// don't override anything, we store the overridden functions in 287 /// this map on the side rather than within the CXXMethodDecl structure. 288 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 289 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 290 291 TranslationUnitDecl *TUDecl; 292 293 /// SourceMgr - The associated SourceManager object. 294 SourceManager &SourceMgr; 295 296 /// LangOpts - The language options used to create the AST associated with 297 /// this ASTContext object. 298 LangOptions LangOpts; 299 300 /// \brief The allocator used to create AST objects. 301 /// 302 /// AST objects are never destructed; rather, all memory associated with the 303 /// AST objects will be released when the ASTContext itself is destroyed. 304 mutable llvm::BumpPtrAllocator BumpAlloc; 305 306 /// \brief Allocator for partial diagnostics. 307 PartialDiagnostic::StorageAllocator DiagAllocator; 308 309 /// \brief The current C++ ABI. 310 llvm::OwningPtr<CXXABI> ABI; 311 CXXABI *createCXXABI(const TargetInfo &T); 312 313 friend class ASTDeclReader; 314 315public: 316 const TargetInfo &Target; 317 IdentifierTable &Idents; 318 SelectorTable &Selectors; 319 Builtin::Context &BuiltinInfo; 320 mutable DeclarationNameTable DeclarationNames; 321 llvm::OwningPtr<ExternalASTSource> ExternalSource; 322 ASTMutationListener *Listener; 323 clang::PrintingPolicy PrintingPolicy; 324 325 // Typedefs which may be provided defining the structure of Objective-C 326 // pseudo-builtins 327 QualType ObjCIdRedefinitionType; 328 QualType ObjCClassRedefinitionType; 329 QualType ObjCSelRedefinitionType; 330 331 SourceManager& getSourceManager() { return SourceMgr; } 332 const SourceManager& getSourceManager() const { return SourceMgr; } 333 void *Allocate(unsigned Size, unsigned Align = 8) const { 334 return BumpAlloc.Allocate(Size, Align); 335 } 336 void Deallocate(void *Ptr) const { } 337 338 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 339 return DiagAllocator; 340 } 341 342 const LangOptions& getLangOptions() const { return LangOpts; } 343 344 Diagnostic &getDiagnostics() const; 345 346 FullSourceLoc getFullLoc(SourceLocation Loc) const { 347 return FullSourceLoc(Loc,SourceMgr); 348 } 349 350 /// \brief Retrieve the attributes for the given declaration. 351 AttrVec& getDeclAttrs(const Decl *D); 352 353 /// \brief Erase the attributes corresponding to the given declaration. 354 void eraseDeclAttrs(const Decl *D); 355 356 /// \brief If this variable is an instantiated static data member of a 357 /// class template specialization, returns the templated static data member 358 /// from which it was instantiated. 359 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 360 const VarDecl *Var); 361 362 /// \brief Note that the static data member \p Inst is an instantiation of 363 /// the static data member template \p Tmpl of a class template. 364 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 365 TemplateSpecializationKind TSK, 366 SourceLocation PointOfInstantiation = SourceLocation()); 367 368 /// \brief If the given using decl is an instantiation of a 369 /// (possibly unresolved) using decl from a template instantiation, 370 /// return it. 371 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 372 373 /// \brief Remember that the using decl \p Inst is an instantiation 374 /// of the using decl \p Pattern of a class template. 375 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 376 377 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 378 UsingShadowDecl *Pattern); 379 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 380 381 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 382 383 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 384 385 // Access to the set of methods overridden by the given C++ method. 386 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 387 overridden_cxx_method_iterator 388 overridden_methods_begin(const CXXMethodDecl *Method) const; 389 390 overridden_cxx_method_iterator 391 overridden_methods_end(const CXXMethodDecl *Method) const; 392 393 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 394 395 /// \brief Note that the given C++ \p Method overrides the given \p 396 /// Overridden method. 397 void addOverriddenMethod(const CXXMethodDecl *Method, 398 const CXXMethodDecl *Overridden); 399 400 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 401 402 403 // Builtin Types. 404 CanQualType VoidTy; 405 CanQualType BoolTy; 406 CanQualType CharTy; 407 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 408 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 409 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 410 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 411 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 412 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 413 CanQualType FloatTy, DoubleTy, LongDoubleTy; 414 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 415 CanQualType VoidPtrTy, NullPtrTy; 416 CanQualType OverloadTy; 417 CanQualType DependentTy; 418 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 419 420 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 421 IdentifierTable &idents, SelectorTable &sels, 422 Builtin::Context &builtins, 423 unsigned size_reserve); 424 425 ~ASTContext(); 426 427 /// \brief Attach an external AST source to the AST context. 428 /// 429 /// The external AST source provides the ability to load parts of 430 /// the abstract syntax tree as needed from some external storage, 431 /// e.g., a precompiled header. 432 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 433 434 /// \brief Retrieve a pointer to the external AST source associated 435 /// with this AST context, if any. 436 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 437 438 /// \brief Attach an AST mutation listener to the AST context. 439 /// 440 /// The AST mutation listener provides the ability to track modifications to 441 /// the abstract syntax tree entities committed after they were initially 442 /// created. 443 void setASTMutationListener(ASTMutationListener *Listener) { 444 this->Listener = Listener; 445 } 446 447 /// \brief Retrieve a pointer to the AST mutation listener associated 448 /// with this AST context, if any. 449 ASTMutationListener *getASTMutationListener() const { return Listener; } 450 451 void PrintStats() const; 452 const std::vector<Type*>& getTypes() const { return Types; } 453 454 //===--------------------------------------------------------------------===// 455 // Type Constructors 456 //===--------------------------------------------------------------------===// 457 458private: 459 /// getExtQualType - Return a type with extended qualifiers. 460 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 461 462 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 463 464public: 465 /// getAddSpaceQualType - Return the uniqued reference to the type for an 466 /// address space qualified type with the specified type and address space. 467 /// The resulting type has a union of the qualifiers from T and the address 468 /// space. If T already has an address space specifier, it is silently 469 /// replaced. 470 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 471 472 /// getObjCGCQualType - Returns the uniqued reference to the type for an 473 /// objc gc qualified type. The retulting type has a union of the qualifiers 474 /// from T and the gc attribute. 475 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 476 477 /// getRestrictType - Returns the uniqued reference to the type for a 478 /// 'restrict' qualified type. The resulting type has a union of the 479 /// qualifiers from T and 'restrict'. 480 QualType getRestrictType(QualType T) const { 481 return T.withFastQualifiers(Qualifiers::Restrict); 482 } 483 484 /// getVolatileType - Returns the uniqued reference to the type for a 485 /// 'volatile' qualified type. The resulting type has a union of the 486 /// qualifiers from T and 'volatile'. 487 QualType getVolatileType(QualType T) const { 488 return T.withFastQualifiers(Qualifiers::Volatile); 489 } 490 491 /// getConstType - Returns the uniqued reference to the type for a 492 /// 'const' qualified type. The resulting type has a union of the 493 /// qualifiers from T and 'const'. 494 /// 495 /// It can be reasonably expected that this will always be 496 /// equivalent to calling T.withConst(). 497 QualType getConstType(QualType T) const { return T.withConst(); } 498 499 /// adjustFunctionType - Change the ExtInfo on a function type. 500 const FunctionType *adjustFunctionType(const FunctionType *Fn, 501 FunctionType::ExtInfo EInfo); 502 503 /// getComplexType - Return the uniqued reference to the type for a complex 504 /// number with the specified element type. 505 QualType getComplexType(QualType T) const; 506 CanQualType getComplexType(CanQualType T) const { 507 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 508 } 509 510 /// getPointerType - Return the uniqued reference to the type for a pointer to 511 /// the specified type. 512 QualType getPointerType(QualType T) const; 513 CanQualType getPointerType(CanQualType T) const { 514 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 515 } 516 517 /// getBlockPointerType - Return the uniqued reference to the type for a block 518 /// of the specified type. 519 QualType getBlockPointerType(QualType T) const; 520 521 /// This gets the struct used to keep track of the descriptor for pointer to 522 /// blocks. 523 QualType getBlockDescriptorType() const; 524 525 // Set the type for a Block descriptor type. 526 void setBlockDescriptorType(QualType T); 527 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 528 QualType getRawBlockdescriptorType() { 529 if (BlockDescriptorType) 530 return getTagDeclType(BlockDescriptorType); 531 return QualType(); 532 } 533 534 /// This gets the struct used to keep track of the extended descriptor for 535 /// pointer to blocks. 536 QualType getBlockDescriptorExtendedType() const; 537 538 // Set the type for a Block descriptor extended type. 539 void setBlockDescriptorExtendedType(QualType T); 540 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 541 /// built. 542 QualType getRawBlockdescriptorExtendedType() const { 543 if (BlockDescriptorExtendedType) 544 return getTagDeclType(BlockDescriptorExtendedType); 545 return QualType(); 546 } 547 548 void setcudaConfigureCallDecl(FunctionDecl *FD) { 549 cudaConfigureCallDecl = FD; 550 } 551 FunctionDecl *getcudaConfigureCallDecl() { 552 return cudaConfigureCallDecl; 553 } 554 555 /// This gets the struct used to keep track of pointer to blocks, complete 556 /// with captured variables. 557 QualType getBlockParmType(bool BlockHasCopyDispose, 558 llvm::SmallVectorImpl<const Expr *> &Layout) const; 559 560 /// This builds the struct used for __block variables. 561 QualType BuildByRefType(llvm::StringRef DeclName, QualType Ty) const; 562 563 /// Returns true iff we need copy/dispose helpers for the given type. 564 bool BlockRequiresCopying(QualType Ty) const; 565 566 /// getLValueReferenceType - Return the uniqued reference to the type for an 567 /// lvalue reference to the specified type. 568 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 569 const; 570 571 /// getRValueReferenceType - Return the uniqued reference to the type for an 572 /// rvalue reference to the specified type. 573 QualType getRValueReferenceType(QualType T) const; 574 575 /// getMemberPointerType - Return the uniqued reference to the type for a 576 /// member pointer to the specified type in the specified class. The class 577 /// is a Type because it could be a dependent name. 578 QualType getMemberPointerType(QualType T, const Type *Cls) const; 579 580 /// getVariableArrayType - Returns a non-unique reference to the type for a 581 /// variable array of the specified element type. 582 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 583 ArrayType::ArraySizeModifier ASM, 584 unsigned IndexTypeQuals, 585 SourceRange Brackets) const; 586 587 /// getDependentSizedArrayType - Returns a non-unique reference to 588 /// the type for a dependently-sized array of the specified element 589 /// type. FIXME: We will need these to be uniqued, or at least 590 /// comparable, at some point. 591 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 592 ArrayType::ArraySizeModifier ASM, 593 unsigned IndexTypeQuals, 594 SourceRange Brackets) const; 595 596 /// getIncompleteArrayType - Returns a unique reference to the type for a 597 /// incomplete array of the specified element type. 598 QualType getIncompleteArrayType(QualType EltTy, 599 ArrayType::ArraySizeModifier ASM, 600 unsigned IndexTypeQuals) const; 601 602 /// getConstantArrayType - Return the unique reference to the type for a 603 /// constant array of the specified element type. 604 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 605 ArrayType::ArraySizeModifier ASM, 606 unsigned IndexTypeQuals) const; 607 608 /// getVariableArrayDecayedType - Returns a vla type where known sizes 609 /// are replaced with [*]. 610 QualType getVariableArrayDecayedType(QualType Ty) const; 611 612 /// getVectorType - Return the unique reference to a vector type of 613 /// the specified element type and size. VectorType must be a built-in type. 614 QualType getVectorType(QualType VectorType, unsigned NumElts, 615 VectorType::VectorKind VecKind) const; 616 617 /// getExtVectorType - Return the unique reference to an extended vector type 618 /// of the specified element type and size. VectorType must be a built-in 619 /// type. 620 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 621 622 /// getDependentSizedExtVectorType - Returns a non-unique reference to 623 /// the type for a dependently-sized vector of the specified element 624 /// type. FIXME: We will need these to be uniqued, or at least 625 /// comparable, at some point. 626 QualType getDependentSizedExtVectorType(QualType VectorType, 627 Expr *SizeExpr, 628 SourceLocation AttrLoc) const; 629 630 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 631 /// 632 QualType getFunctionNoProtoType(QualType ResultTy, 633 const FunctionType::ExtInfo &Info) const; 634 635 QualType getFunctionNoProtoType(QualType ResultTy) const { 636 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 637 } 638 639 /// getFunctionType - Return a normal function type with a typed 640 /// argument list. 641 QualType getFunctionType(QualType ResultTy, 642 const QualType *Args, unsigned NumArgs, 643 const FunctionProtoType::ExtProtoInfo &EPI) const; 644 645 /// getTypeDeclType - Return the unique reference to the type for 646 /// the specified type declaration. 647 QualType getTypeDeclType(const TypeDecl *Decl, 648 const TypeDecl *PrevDecl = 0) const { 649 assert(Decl && "Passed null for Decl param"); 650 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 651 652 if (PrevDecl) { 653 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 654 Decl->TypeForDecl = PrevDecl->TypeForDecl; 655 return QualType(PrevDecl->TypeForDecl, 0); 656 } 657 658 return getTypeDeclTypeSlow(Decl); 659 } 660 661 /// getTypedefType - Return the unique reference to the type for the 662 /// specified typename decl. 663 QualType getTypedefType(const TypedefDecl *Decl, QualType Canon = QualType()) 664 const; 665 666 QualType getRecordType(const RecordDecl *Decl) const; 667 668 QualType getEnumType(const EnumDecl *Decl) const; 669 670 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 671 672 QualType getAttributedType(AttributedType::Kind attrKind, 673 QualType modifiedType, 674 QualType equivalentType); 675 676 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 677 QualType Replacement) const; 678 QualType getSubstTemplateTypeParmPackType( 679 const TemplateTypeParmType *Replaced, 680 const TemplateArgument &ArgPack); 681 682 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 683 bool ParameterPack, 684 IdentifierInfo *Name = 0) const; 685 686 QualType getTemplateSpecializationType(TemplateName T, 687 const TemplateArgument *Args, 688 unsigned NumArgs, 689 QualType Canon = QualType()) const; 690 691 QualType getCanonicalTemplateSpecializationType(TemplateName T, 692 const TemplateArgument *Args, 693 unsigned NumArgs) const; 694 695 QualType getTemplateSpecializationType(TemplateName T, 696 const TemplateArgumentListInfo &Args, 697 QualType Canon = QualType()) const; 698 699 TypeSourceInfo * 700 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 701 const TemplateArgumentListInfo &Args, 702 QualType Canon = QualType()) const; 703 704 QualType getParenType(QualType NamedType) const; 705 706 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 707 NestedNameSpecifier *NNS, 708 QualType NamedType) const; 709 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 710 NestedNameSpecifier *NNS, 711 const IdentifierInfo *Name, 712 QualType Canon = QualType()) const; 713 714 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 715 NestedNameSpecifier *NNS, 716 const IdentifierInfo *Name, 717 const TemplateArgumentListInfo &Args) const; 718 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 719 NestedNameSpecifier *NNS, 720 const IdentifierInfo *Name, 721 unsigned NumArgs, 722 const TemplateArgument *Args) const; 723 724 QualType getPackExpansionType(QualType Pattern, 725 llvm::Optional<unsigned> NumExpansions); 726 727 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const; 728 729 QualType getObjCObjectType(QualType Base, 730 ObjCProtocolDecl * const *Protocols, 731 unsigned NumProtocols) const; 732 733 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 734 /// for the given ObjCObjectType. 735 QualType getObjCObjectPointerType(QualType OIT) const; 736 737 /// getTypeOfType - GCC extension. 738 QualType getTypeOfExprType(Expr *e) const; 739 QualType getTypeOfType(QualType t) const; 740 741 /// getDecltypeType - C++0x decltype. 742 QualType getDecltypeType(Expr *e) const; 743 744 /// getAutoType - C++0x deduced auto type. 745 QualType getAutoType(QualType DeducedType) const; 746 747 /// getTagDeclType - Return the unique reference to the type for the 748 /// specified TagDecl (struct/union/class/enum) decl. 749 QualType getTagDeclType(const TagDecl *Decl) const; 750 751 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 752 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 753 CanQualType getSizeType() const; 754 755 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 756 /// returns a type compatible with the type defined in <stddef.h> as defined 757 /// by the target. 758 QualType getWCharType() const { return WCharTy; } 759 760 /// getSignedWCharType - Return the type of "signed wchar_t". 761 /// Used when in C++, as a GCC extension. 762 QualType getSignedWCharType() const; 763 764 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 765 /// Used when in C++, as a GCC extension. 766 QualType getUnsignedWCharType() const; 767 768 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 769 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 770 QualType getPointerDiffType() const; 771 772 // getCFConstantStringType - Return the C structure type used to represent 773 // constant CFStrings. 774 QualType getCFConstantStringType() const; 775 776 // getNSConstantStringType - Return the C structure type used to represent 777 // constant NSStrings. 778 QualType getNSConstantStringType() const; 779 /// Get the structure type used to representation NSStrings, or NULL 780 /// if it hasn't yet been built. 781 QualType getRawNSConstantStringType() const { 782 if (NSConstantStringTypeDecl) 783 return getTagDeclType(NSConstantStringTypeDecl); 784 return QualType(); 785 } 786 void setNSConstantStringType(QualType T); 787 788 789 /// Get the structure type used to representation CFStrings, or NULL 790 /// if it hasn't yet been built. 791 QualType getRawCFConstantStringType() const { 792 if (CFConstantStringTypeDecl) 793 return getTagDeclType(CFConstantStringTypeDecl); 794 return QualType(); 795 } 796 void setCFConstantStringType(QualType T); 797 798 // This setter/getter represents the ObjC type for an NSConstantString. 799 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 800 QualType getObjCConstantStringInterface() const { 801 return ObjCConstantStringType; 802 } 803 804 //// This gets the struct used to keep track of fast enumerations. 805 QualType getObjCFastEnumerationStateType() const; 806 807 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 808 /// been built. 809 QualType getRawObjCFastEnumerationStateType() const { 810 if (ObjCFastEnumerationStateTypeDecl) 811 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 812 return QualType(); 813 } 814 815 void setObjCFastEnumerationStateType(QualType T); 816 817 /// \brief Set the type for the C FILE type. 818 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 819 820 /// \brief Retrieve the C FILE type. 821 QualType getFILEType() const { 822 if (FILEDecl) 823 return getTypeDeclType(FILEDecl); 824 return QualType(); 825 } 826 827 /// \brief Set the type for the C jmp_buf type. 828 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 829 this->jmp_bufDecl = jmp_bufDecl; 830 } 831 832 /// \brief Retrieve the C jmp_buf type. 833 QualType getjmp_bufType() const { 834 if (jmp_bufDecl) 835 return getTypeDeclType(jmp_bufDecl); 836 return QualType(); 837 } 838 839 /// \brief Set the type for the C sigjmp_buf type. 840 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 841 this->sigjmp_bufDecl = sigjmp_bufDecl; 842 } 843 844 /// \brief Retrieve the C sigjmp_buf type. 845 QualType getsigjmp_bufType() const { 846 if (sigjmp_bufDecl) 847 return getTypeDeclType(sigjmp_bufDecl); 848 return QualType(); 849 } 850 851 /// \brief The result type of logical operations, '<', '>', '!=', etc. 852 QualType getLogicalOperationType() const { 853 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 854 } 855 856 /// getObjCEncodingForType - Emit the ObjC type encoding for the 857 /// given type into \arg S. If \arg NameFields is specified then 858 /// record field names are also encoded. 859 void getObjCEncodingForType(QualType t, std::string &S, 860 const FieldDecl *Field=0) const; 861 862 void getLegacyIntegralTypeEncoding(QualType &t) const; 863 864 // Put the string version of type qualifiers into S. 865 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 866 std::string &S) const; 867 868 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 869 //function. This is in the same format as Objective-C method encodings. 870 void getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 871 872 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 873 /// declaration. 874 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S) 875 const; 876 877 /// getObjCEncodingForBlock - Return the encoded type for this block 878 /// declaration. 879 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 880 881 /// getObjCEncodingForPropertyDecl - Return the encoded type for 882 /// this method declaration. If non-NULL, Container must be either 883 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 884 /// only be NULL when getting encodings for protocol properties. 885 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 886 const Decl *Container, 887 std::string &S) const; 888 889 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 890 ObjCProtocolDecl *rProto) const; 891 892 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 893 /// purpose in characters. 894 CharUnits getObjCEncodingTypeSize(QualType t) const; 895 896 /// \brief Whether __[u]int128_t identifier is installed. 897 bool isInt128Installed() const { return IsInt128Installed; } 898 void setInt128Installed() { IsInt128Installed = true; } 899 900 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 901 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 902 QualType getObjCIdType() const { return ObjCIdTypedefType; } 903 void setObjCIdType(QualType T); 904 905 void setObjCSelType(QualType T); 906 QualType getObjCSelType() const { return ObjCSelTypedefType; } 907 908 void setObjCProtoType(QualType QT); 909 QualType getObjCProtoType() const { return ObjCProtoType; } 910 911 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 912 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 913 /// struct. 914 QualType getObjCClassType() const { return ObjCClassTypedefType; } 915 void setObjCClassType(QualType T); 916 917 void setBuiltinVaListType(QualType T); 918 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 919 920 /// getCVRQualifiedType - Returns a type with additional const, 921 /// volatile, or restrict qualifiers. 922 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 923 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 924 } 925 926 /// getQualifiedType - Returns a type with additional qualifiers. 927 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 928 if (!Qs.hasNonFastQualifiers()) 929 return T.withFastQualifiers(Qs.getFastQualifiers()); 930 QualifierCollector Qc(Qs); 931 const Type *Ptr = Qc.strip(T); 932 return getExtQualType(Ptr, Qc); 933 } 934 935 /// getQualifiedType - Returns a type with additional qualifiers. 936 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 937 if (!Qs.hasNonFastQualifiers()) 938 return QualType(T, Qs.getFastQualifiers()); 939 return getExtQualType(T, Qs); 940 } 941 942 DeclarationNameInfo getNameForTemplate(TemplateName Name, 943 SourceLocation NameLoc) const; 944 945 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 946 UnresolvedSetIterator End) const; 947 948 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 949 bool TemplateKeyword, 950 TemplateDecl *Template) const; 951 952 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 953 const IdentifierInfo *Name) const; 954 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 955 OverloadedOperatorKind Operator) const; 956 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 957 const TemplateArgument &ArgPack) const; 958 959 enum GetBuiltinTypeError { 960 GE_None, //< No error 961 GE_Missing_stdio, //< Missing a type from <stdio.h> 962 GE_Missing_setjmp //< Missing a type from <setjmp.h> 963 }; 964 965 /// GetBuiltinType - Return the type for the specified builtin. If 966 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 967 /// arguments to the builtin that are required to be integer constant 968 /// expressions. 969 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 970 unsigned *IntegerConstantArgs = 0) const; 971 972private: 973 CanQualType getFromTargetType(unsigned Type) const; 974 975 //===--------------------------------------------------------------------===// 976 // Type Predicates. 977 //===--------------------------------------------------------------------===// 978 979public: 980 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 981 /// garbage collection attribute. 982 /// 983 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 984 985 /// areCompatibleVectorTypes - Return true if the given vector types 986 /// are of the same unqualified type or if they are equivalent to the same 987 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 988 /// Neon) types. 989 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 990 991 /// isObjCNSObjectType - Return true if this is an NSObject object with 992 /// its NSObject attribute set. 993 bool isObjCNSObjectType(QualType Ty) const; 994 995 //===--------------------------------------------------------------------===// 996 // Type Sizing and Analysis 997 //===--------------------------------------------------------------------===// 998 999 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1000 /// scalar floating point type. 1001 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1002 1003 /// getTypeInfo - Get the size and alignment of the specified complete type in 1004 /// bits. 1005 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1006 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1007 return getTypeInfo(T.getTypePtr()); 1008 } 1009 1010 /// getTypeSize - Return the size of the specified type, in bits. This method 1011 /// does not work on incomplete types. 1012 uint64_t getTypeSize(QualType T) const { 1013 return getTypeInfo(T).first; 1014 } 1015 uint64_t getTypeSize(const Type *T) const { 1016 return getTypeInfo(T).first; 1017 } 1018 1019 /// getCharWidth - Return the size of the character type, in bits 1020 uint64_t getCharWidth() const { 1021 return getTypeSize(CharTy); 1022 } 1023 1024 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1025 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1026 1027 /// toBits - Convert a size in characters to a size in bits. 1028 int64_t toBits(CharUnits CharSize) const; 1029 1030 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1031 /// This method does not work on incomplete types. 1032 CharUnits getTypeSizeInChars(QualType T) const; 1033 CharUnits getTypeSizeInChars(const Type *T) const; 1034 1035 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1036 /// This method does not work on incomplete types. 1037 unsigned getTypeAlign(QualType T) const { 1038 return getTypeInfo(T).second; 1039 } 1040 unsigned getTypeAlign(const Type *T) const { 1041 return getTypeInfo(T).second; 1042 } 1043 1044 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1045 /// characters. This method does not work on incomplete types. 1046 CharUnits getTypeAlignInChars(QualType T) const; 1047 CharUnits getTypeAlignInChars(const Type *T) const; 1048 1049 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1050 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1051 1052 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1053 /// type for the current target in bits. This can be different than the ABI 1054 /// alignment in cases where it is beneficial for performance to overalign 1055 /// a data type. 1056 unsigned getPreferredTypeAlign(const Type *T) const; 1057 1058 /// getDeclAlign - Return a conservative estimate of the alignment of 1059 /// the specified decl. Note that bitfields do not have a valid alignment, so 1060 /// this method will assert on them. 1061 /// If @p RefAsPointee, references are treated like their underlying type 1062 /// (for alignof), else they're treated like pointers (for CodeGen). 1063 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1064 1065 /// getASTRecordLayout - Get or compute information about the layout of the 1066 /// specified record (struct/union/class), which indicates its size and field 1067 /// position information. 1068 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1069 1070 /// getASTObjCInterfaceLayout - Get or compute information about the 1071 /// layout of the specified Objective-C interface. 1072 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1073 const; 1074 1075 void DumpRecordLayout(const RecordDecl *RD, llvm::raw_ostream &OS) const; 1076 1077 /// getASTObjCImplementationLayout - Get or compute information about 1078 /// the layout of the specified Objective-C implementation. This may 1079 /// differ from the interface if synthesized ivars are present. 1080 const ASTRecordLayout & 1081 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1082 1083 /// getKeyFunction - Get the key function for the given record decl, or NULL 1084 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1085 /// section 5.2.3: 1086 /// 1087 /// ...the first non-pure virtual function that is not inline at the point 1088 /// of class definition. 1089 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1090 1091 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1092 1093 MangleContext *createMangleContext(); 1094 1095 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1096 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) 1097 const; 1098 1099 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1100 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const; 1101 1102 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1103 void CollectInheritedProtocols(const Decl *CDecl, 1104 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1105 1106 //===--------------------------------------------------------------------===// 1107 // Type Operators 1108 //===--------------------------------------------------------------------===// 1109 1110 /// getCanonicalType - Return the canonical (structural) type corresponding to 1111 /// the specified potentially non-canonical type. The non-canonical version 1112 /// of a type may have many "decorated" versions of types. Decorators can 1113 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1114 /// to be free of any of these, allowing two canonical types to be compared 1115 /// for exact equality with a simple pointer comparison. 1116 CanQualType getCanonicalType(QualType T) const { 1117 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1118 } 1119 1120 const Type *getCanonicalType(const Type *T) const { 1121 return T->getCanonicalTypeInternal().getTypePtr(); 1122 } 1123 1124 /// getCanonicalParamType - Return the canonical parameter type 1125 /// corresponding to the specific potentially non-canonical one. 1126 /// Qualifiers are stripped off, functions are turned into function 1127 /// pointers, and arrays decay one level into pointers. 1128 CanQualType getCanonicalParamType(QualType T) const; 1129 1130 /// \brief Determine whether the given types are equivalent. 1131 bool hasSameType(QualType T1, QualType T2) { 1132 return getCanonicalType(T1) == getCanonicalType(T2); 1133 } 1134 1135 /// \brief Returns this type as a completely-unqualified array type, 1136 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1137 /// sugaring from the types, similar to the behavior of 1138 /// QualType::getUnqualifiedType(). 1139 /// 1140 /// \param T is the qualified type, which may be an ArrayType 1141 /// 1142 /// \param Quals will receive the full set of qualifiers that were 1143 /// applied to the array. 1144 /// 1145 /// \returns if this is an array type, the completely unqualified array type 1146 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1147 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1148 1149 /// \brief Determine whether the given types are equivalent after 1150 /// cvr-qualifiers have been removed. 1151 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1152 return getCanonicalType(T1).getTypePtr() == 1153 getCanonicalType(T2).getTypePtr(); 1154 } 1155 1156 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1157 1158 /// \brief Retrieves the "canonical" nested name specifier for a 1159 /// given nested name specifier. 1160 /// 1161 /// The canonical nested name specifier is a nested name specifier 1162 /// that uniquely identifies a type or namespace within the type 1163 /// system. For example, given: 1164 /// 1165 /// \code 1166 /// namespace N { 1167 /// struct S { 1168 /// template<typename T> struct X { typename T* type; }; 1169 /// }; 1170 /// } 1171 /// 1172 /// template<typename T> struct Y { 1173 /// typename N::S::X<T>::type member; 1174 /// }; 1175 /// \endcode 1176 /// 1177 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1178 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1179 /// by declarations in the type system and the canonical type for 1180 /// the template type parameter 'T' is template-param-0-0. 1181 NestedNameSpecifier * 1182 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1183 1184 /// \brief Retrieves the default calling convention to use for 1185 /// C++ instance methods. 1186 CallingConv getDefaultMethodCallConv(); 1187 1188 /// \brief Retrieves the canonical representation of the given 1189 /// calling convention. 1190 CallingConv getCanonicalCallConv(CallingConv CC) const { 1191 if (CC == CC_C) 1192 return CC_Default; 1193 return CC; 1194 } 1195 1196 /// \brief Determines whether two calling conventions name the same 1197 /// calling convention. 1198 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1199 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1200 } 1201 1202 /// \brief Retrieves the "canonical" template name that refers to a 1203 /// given template. 1204 /// 1205 /// The canonical template name is the simplest expression that can 1206 /// be used to refer to a given template. For most templates, this 1207 /// expression is just the template declaration itself. For example, 1208 /// the template std::vector can be referred to via a variety of 1209 /// names---std::vector, ::std::vector, vector (if vector is in 1210 /// scope), etc.---but all of these names map down to the same 1211 /// TemplateDecl, which is used to form the canonical template name. 1212 /// 1213 /// Dependent template names are more interesting. Here, the 1214 /// template name could be something like T::template apply or 1215 /// std::allocator<T>::template rebind, where the nested name 1216 /// specifier itself is dependent. In this case, the canonical 1217 /// template name uses the shortest form of the dependent 1218 /// nested-name-specifier, which itself contains all canonical 1219 /// types, values, and templates. 1220 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1221 1222 /// \brief Determine whether the given template names refer to the same 1223 /// template. 1224 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1225 1226 /// \brief Retrieve the "canonical" template argument. 1227 /// 1228 /// The canonical template argument is the simplest template argument 1229 /// (which may be a type, value, expression, or declaration) that 1230 /// expresses the value of the argument. 1231 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1232 const; 1233 1234 /// Type Query functions. If the type is an instance of the specified class, 1235 /// return the Type pointer for the underlying maximally pretty type. This 1236 /// is a member of ASTContext because this may need to do some amount of 1237 /// canonicalization, e.g. to move type qualifiers into the element type. 1238 const ArrayType *getAsArrayType(QualType T) const; 1239 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1240 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1241 } 1242 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1243 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1244 } 1245 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1246 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1247 } 1248 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1249 const { 1250 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1251 } 1252 1253 /// getBaseElementType - Returns the innermost element type of an array type. 1254 /// For example, will return "int" for int[m][n] 1255 QualType getBaseElementType(const ArrayType *VAT) const; 1256 1257 /// getBaseElementType - Returns the innermost element type of a type 1258 /// (which needn't actually be an array type). 1259 QualType getBaseElementType(QualType QT) const; 1260 1261 /// getConstantArrayElementCount - Returns number of constant array elements. 1262 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1263 1264 /// getArrayDecayedType - Return the properly qualified result of decaying the 1265 /// specified array type to a pointer. This operation is non-trivial when 1266 /// handling typedefs etc. The canonical type of "T" must be an array type, 1267 /// this returns a pointer to a properly qualified element of the array. 1268 /// 1269 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1270 QualType getArrayDecayedType(QualType T) const; 1271 1272 /// getPromotedIntegerType - Returns the type that Promotable will 1273 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1274 /// integer type. 1275 QualType getPromotedIntegerType(QualType PromotableType) const; 1276 1277 /// \brief Whether this is a promotable bitfield reference according 1278 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1279 /// 1280 /// \returns the type this bit-field will promote to, or NULL if no 1281 /// promotion occurs. 1282 QualType isPromotableBitField(Expr *E) const; 1283 1284 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1285 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1286 /// LHS < RHS, return -1. 1287 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1288 1289 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1290 /// point types, ignoring the domain of the type (i.e. 'double' == 1291 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1292 /// LHS < RHS, return -1. 1293 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1294 1295 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1296 /// point or a complex type (based on typeDomain/typeSize). 1297 /// 'typeDomain' is a real floating point or complex type. 1298 /// 'typeSize' is a real floating point or complex type. 1299 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1300 QualType typeDomain) const; 1301 1302private: 1303 // Helper for integer ordering 1304 unsigned getIntegerRank(const Type *T) const; 1305 1306public: 1307 1308 //===--------------------------------------------------------------------===// 1309 // Type Compatibility Predicates 1310 //===--------------------------------------------------------------------===// 1311 1312 /// Compatibility predicates used to check assignment expressions. 1313 bool typesAreCompatible(QualType T1, QualType T2, 1314 bool CompareUnqualified = false); // C99 6.2.7p1 1315 1316 bool typesAreBlockPointerCompatible(QualType, QualType); 1317 1318 bool isObjCIdType(QualType T) const { 1319 return T == ObjCIdTypedefType; 1320 } 1321 bool isObjCClassType(QualType T) const { 1322 return T == ObjCClassTypedefType; 1323 } 1324 bool isObjCSelType(QualType T) const { 1325 return T == ObjCSelTypedefType; 1326 } 1327 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1328 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1329 bool ForCompare); 1330 1331 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1332 1333 // Check the safety of assignment from LHS to RHS 1334 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1335 const ObjCObjectPointerType *RHSOPT); 1336 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1337 const ObjCObjectType *RHS); 1338 bool canAssignObjCInterfacesInBlockPointer( 1339 const ObjCObjectPointerType *LHSOPT, 1340 const ObjCObjectPointerType *RHSOPT); 1341 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1342 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1343 const ObjCObjectPointerType *RHSOPT); 1344 bool canBindObjCObjectType(QualType To, QualType From); 1345 1346 // Functions for calculating composite types 1347 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1348 bool Unqualified = false); 1349 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1350 bool Unqualified = false); 1351 QualType mergeFunctionArgumentTypes(QualType, QualType, 1352 bool OfBlockPointer=false, 1353 bool Unqualified = false); 1354 QualType mergeTransparentUnionType(QualType, QualType, 1355 bool OfBlockPointer=false, 1356 bool Unqualified = false); 1357 1358 QualType mergeObjCGCQualifiers(QualType, QualType); 1359 1360 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1361 ObjCLayouts[CD] = 0; 1362 } 1363 1364 //===--------------------------------------------------------------------===// 1365 // Integer Predicates 1366 //===--------------------------------------------------------------------===// 1367 1368 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1369 // of bits in an integer type excluding any padding bits. 1370 unsigned getIntWidth(QualType T) const; 1371 1372 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1373 // unsigned integer type. This method takes a signed type, and returns the 1374 // corresponding unsigned integer type. 1375 QualType getCorrespondingUnsignedType(QualType T); 1376 1377 //===--------------------------------------------------------------------===// 1378 // Type Iterators. 1379 //===--------------------------------------------------------------------===// 1380 1381 typedef std::vector<Type*>::iterator type_iterator; 1382 typedef std::vector<Type*>::const_iterator const_type_iterator; 1383 1384 type_iterator types_begin() { return Types.begin(); } 1385 type_iterator types_end() { return Types.end(); } 1386 const_type_iterator types_begin() const { return Types.begin(); } 1387 const_type_iterator types_end() const { return Types.end(); } 1388 1389 //===--------------------------------------------------------------------===// 1390 // Integer Values 1391 //===--------------------------------------------------------------------===// 1392 1393 /// MakeIntValue - Make an APSInt of the appropriate width and 1394 /// signedness for the given \arg Value and integer \arg Type. 1395 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1396 llvm::APSInt Res(getIntWidth(Type), !Type->isSignedIntegerType()); 1397 Res = Value; 1398 return Res; 1399 } 1400 1401 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1402 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1403 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1404 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1405 1406 /// \brief returns true if there is at lease one @implementation in TU. 1407 bool AnyObjCImplementation() { 1408 return !ObjCImpls.empty(); 1409 } 1410 1411 /// \brief Set the implementation of ObjCInterfaceDecl. 1412 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1413 ObjCImplementationDecl *ImplD); 1414 /// \brief Set the implementation of ObjCCategoryDecl. 1415 void setObjCImplementation(ObjCCategoryDecl *CatD, 1416 ObjCCategoryImplDecl *ImplD); 1417 1418 /// \brief Set the copy inialization expression of a block var decl. 1419 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1420 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1421 /// none exists. 1422 Expr *getBlockVarCopyInits(const VarDecl*VD); 1423 1424 /// \brief Allocate an uninitialized TypeSourceInfo. 1425 /// 1426 /// The caller should initialize the memory held by TypeSourceInfo using 1427 /// the TypeLoc wrappers. 1428 /// 1429 /// \param T the type that will be the basis for type source info. This type 1430 /// should refer to how the declarator was written in source code, not to 1431 /// what type semantic analysis resolved the declarator to. 1432 /// 1433 /// \param Size the size of the type info to create, or 0 if the size 1434 /// should be calculated based on the type. 1435 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1436 1437 /// \brief Allocate a TypeSourceInfo where all locations have been 1438 /// initialized to a given location, which defaults to the empty 1439 /// location. 1440 TypeSourceInfo * 1441 getTrivialTypeSourceInfo(QualType T, 1442 SourceLocation Loc = SourceLocation()) const; 1443 1444 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1445 1446 /// \brief Add a deallocation callback that will be invoked when the 1447 /// ASTContext is destroyed. 1448 /// 1449 /// \brief Callback A callback function that will be invoked on destruction. 1450 /// 1451 /// \brief Data Pointer data that will be provided to the callback function 1452 /// when it is called. 1453 void AddDeallocation(void (*Callback)(void*), void *Data); 1454 1455 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1456 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1457 1458 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1459 /// lazily, only when used; this is only relevant for function or file scoped 1460 /// var definitions. 1461 /// 1462 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1463 /// it is not used. 1464 bool DeclMustBeEmitted(const Decl *D); 1465 1466 //===--------------------------------------------------------------------===// 1467 // Statistics 1468 //===--------------------------------------------------------------------===// 1469 1470 /// \brief The number of implicitly-declared default constructors. 1471 static unsigned NumImplicitDefaultConstructors; 1472 1473 /// \brief The number of implicitly-declared default constructors for 1474 /// which declarations were built. 1475 static unsigned NumImplicitDefaultConstructorsDeclared; 1476 1477 /// \brief The number of implicitly-declared copy constructors. 1478 static unsigned NumImplicitCopyConstructors; 1479 1480 /// \brief The number of implicitly-declared copy constructors for 1481 /// which declarations were built. 1482 static unsigned NumImplicitCopyConstructorsDeclared; 1483 1484 /// \brief The number of implicitly-declared copy assignment operators. 1485 static unsigned NumImplicitCopyAssignmentOperators; 1486 1487 /// \brief The number of implicitly-declared copy assignment operators for 1488 /// which declarations were built. 1489 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1490 1491 /// \brief The number of implicitly-declared destructors. 1492 static unsigned NumImplicitDestructors; 1493 1494 /// \brief The number of implicitly-declared destructors for which 1495 /// declarations were built. 1496 static unsigned NumImplicitDestructorsDeclared; 1497 1498private: 1499 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1500 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1501 1502 void InitBuiltinTypes(); 1503 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1504 1505 // Return the ObjC type encoding for a given type. 1506 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1507 bool ExpandPointedToStructures, 1508 bool ExpandStructures, 1509 const FieldDecl *Field, 1510 bool OutermostType = false, 1511 bool EncodingProperty = false) const; 1512 1513 const ASTRecordLayout & 1514 getObjCLayout(const ObjCInterfaceDecl *D, 1515 const ObjCImplementationDecl *Impl) const; 1516 1517private: 1518 /// \brief A set of deallocations that should be performed when the 1519 /// ASTContext is destroyed. 1520 llvm::SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1521 1522 // FIXME: This currently contains the set of StoredDeclMaps used 1523 // by DeclContext objects. This probably should not be in ASTContext, 1524 // but we include it here so that ASTContext can quickly deallocate them. 1525 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1526 1527 /// \brief A counter used to uniquely identify "blocks". 1528 mutable unsigned int UniqueBlockByRefTypeID; 1529 mutable unsigned int UniqueBlockParmTypeID; 1530 1531 friend class DeclContext; 1532 friend class DeclarationNameTable; 1533 void ReleaseDeclContextMaps(); 1534}; 1535 1536/// @brief Utility function for constructing a nullary selector. 1537static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 1538 IdentifierInfo* II = &Ctx.Idents.get(name); 1539 return Ctx.Selectors.getSelector(0, &II); 1540} 1541 1542/// @brief Utility function for constructing an unary selector. 1543static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { 1544 IdentifierInfo* II = &Ctx.Idents.get(name); 1545 return Ctx.Selectors.getSelector(1, &II); 1546} 1547 1548} // end namespace clang 1549 1550// operator new and delete aren't allowed inside namespaces. 1551// The throw specifications are mandated by the standard. 1552/// @brief Placement new for using the ASTContext's allocator. 1553/// 1554/// This placement form of operator new uses the ASTContext's allocator for 1555/// obtaining memory. It is a non-throwing new, which means that it returns 1556/// null on error. (If that is what the allocator does. The current does, so if 1557/// this ever changes, this operator will have to be changed, too.) 1558/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1559/// @code 1560/// // Default alignment (8) 1561/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1562/// // Specific alignment 1563/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1564/// @endcode 1565/// Please note that you cannot use delete on the pointer; it must be 1566/// deallocated using an explicit destructor call followed by 1567/// @c Context.Deallocate(Ptr). 1568/// 1569/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1570/// @param C The ASTContext that provides the allocator. 1571/// @param Alignment The alignment of the allocated memory (if the underlying 1572/// allocator supports it). 1573/// @return The allocated memory. Could be NULL. 1574inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1575 size_t Alignment) throw () { 1576 return C.Allocate(Bytes, Alignment); 1577} 1578/// @brief Placement delete companion to the new above. 1579/// 1580/// This operator is just a companion to the new above. There is no way of 1581/// invoking it directly; see the new operator for more details. This operator 1582/// is called implicitly by the compiler if a placement new expression using 1583/// the ASTContext throws in the object constructor. 1584inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1585 throw () { 1586 C.Deallocate(Ptr); 1587} 1588 1589/// This placement form of operator new[] uses the ASTContext's allocator for 1590/// obtaining memory. It is a non-throwing new[], which means that it returns 1591/// null on error. 1592/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1593/// @code 1594/// // Default alignment (8) 1595/// char *data = new (Context) char[10]; 1596/// // Specific alignment 1597/// char *data = new (Context, 4) char[10]; 1598/// @endcode 1599/// Please note that you cannot use delete on the pointer; it must be 1600/// deallocated using an explicit destructor call followed by 1601/// @c Context.Deallocate(Ptr). 1602/// 1603/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1604/// @param C The ASTContext that provides the allocator. 1605/// @param Alignment The alignment of the allocated memory (if the underlying 1606/// allocator supports it). 1607/// @return The allocated memory. Could be NULL. 1608inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1609 size_t Alignment = 8) throw () { 1610 return C.Allocate(Bytes, Alignment); 1611} 1612 1613/// @brief Placement delete[] companion to the new[] above. 1614/// 1615/// This operator is just a companion to the new[] above. There is no way of 1616/// invoking it directly; see the new[] operator for more details. This operator 1617/// is called implicitly by the compiler if a placement new[] expression using 1618/// the ASTContext throws in the object constructor. 1619inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1620 throw () { 1621 C.Deallocate(Ptr); 1622} 1623 1624#endif 1625