ASTContext.h revision e97179c675b341927807c718be215c8d1aab8acb
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/AddressSpaces.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/LangOptions.h" 20#include "clang/Basic/OperatorKinds.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/VersionTuple.h" 23#include "clang/AST/Decl.h" 24#include "clang/AST/NestedNameSpecifier.h" 25#include "clang/AST/PrettyPrinter.h" 26#include "clang/AST/TemplateName.h" 27#include "clang/AST/Type.h" 28#include "clang/AST/CanonicalType.h" 29#include "clang/AST/UsuallyTinyPtrVector.h" 30#include "llvm/ADT/DenseMap.h" 31#include "llvm/ADT/FoldingSet.h" 32#include "llvm/ADT/IntrusiveRefCntPtr.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/Support/Allocator.h" 36#include <vector> 37 38namespace llvm { 39 struct fltSemantics; 40} 41 42namespace clang { 43 class FileManager; 44 class ASTRecordLayout; 45 class BlockExpr; 46 class CharUnits; 47 class Diagnostic; 48 class Expr; 49 class ExternalASTSource; 50 class ASTMutationListener; 51 class IdentifierTable; 52 class SelectorTable; 53 class SourceManager; 54 class TargetInfo; 55 class CXXABI; 56 // Decls 57 class DeclContext; 58 class CXXMethodDecl; 59 class CXXRecordDecl; 60 class Decl; 61 class FieldDecl; 62 class MangleContext; 63 class ObjCIvarDecl; 64 class ObjCIvarRefExpr; 65 class ObjCPropertyDecl; 66 class RecordDecl; 67 class StoredDeclsMap; 68 class TagDecl; 69 class TemplateTemplateParmDecl; 70 class TemplateTypeParmDecl; 71 class TranslationUnitDecl; 72 class TypeDecl; 73 class TypedefNameDecl; 74 class UsingDecl; 75 class UsingShadowDecl; 76 class UnresolvedSetIterator; 77 78 namespace Builtin { class Context; } 79 80/// ASTContext - This class holds long-lived AST nodes (such as types and 81/// decls) that can be referred to throughout the semantic analysis of a file. 82class ASTContext : public llvm::RefCountedBase<ASTContext> { 83 ASTContext &this_() { return *this; } 84 85 mutable std::vector<Type*> Types; 86 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 87 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 88 mutable llvm::FoldingSet<PointerType> PointerTypes; 89 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 90 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 91 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 92 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 93 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 94 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 95 mutable std::vector<VariableArrayType*> VariableArrayTypes; 96 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 97 mutable llvm::FoldingSet<DependentSizedExtVectorType> 98 DependentSizedExtVectorTypes; 99 mutable llvm::FoldingSet<VectorType> VectorTypes; 100 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 101 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 102 FunctionProtoTypes; 103 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 104 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 105 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 106 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 107 SubstTemplateTypeParmTypes; 108 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 109 SubstTemplateTypeParmPackTypes; 110 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 111 TemplateSpecializationTypes; 112 mutable llvm::FoldingSet<ParenType> ParenTypes; 113 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 114 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 115 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 116 ASTContext&> 117 DependentTemplateSpecializationTypes; 118 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 119 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 120 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 121 mutable llvm::FoldingSet<AutoType> AutoTypes; 122 llvm::FoldingSet<AttributedType> AttributedTypes; 123 124 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 125 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 126 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 127 SubstTemplateTemplateParms; 128 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 129 ASTContext&> 130 SubstTemplateTemplateParmPacks; 131 132 /// \brief The set of nested name specifiers. 133 /// 134 /// This set is managed by the NestedNameSpecifier class. 135 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 136 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 137 friend class NestedNameSpecifier; 138 139 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 140 /// This is lazily created. This is intentionally not serialized. 141 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 142 ASTRecordLayouts; 143 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 144 ObjCLayouts; 145 146 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 147 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 148 149 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 150 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 151 152 /// \brief Mapping from __block VarDecls to their copy initialization expr. 153 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 154 155 /// \brief Mapping from class scope functions specialization to their 156 /// template patterns. 157 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 158 ClassScopeSpecializationPattern; 159 160 /// \brief Representation of a "canonical" template template parameter that 161 /// is used in canonical template names. 162 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 163 TemplateTemplateParmDecl *Parm; 164 165 public: 166 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 167 : Parm(Parm) { } 168 169 TemplateTemplateParmDecl *getParam() const { return Parm; } 170 171 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 172 173 static void Profile(llvm::FoldingSetNodeID &ID, 174 TemplateTemplateParmDecl *Parm); 175 }; 176 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 177 CanonTemplateTemplateParms; 178 179 TemplateTemplateParmDecl * 180 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 181 182 /// \brief The typedef for the __int128_t type. 183 mutable TypedefDecl *Int128Decl; 184 185 /// \brief The typedef for the __uint128_t type. 186 mutable TypedefDecl *UInt128Decl; 187 188 /// BuiltinVaListType - built-in va list type. 189 /// This is initially null and set by Sema::LazilyCreateBuiltin when 190 /// a builtin that takes a valist is encountered. 191 QualType BuiltinVaListType; 192 193 /// \brief The typedef for the predefined 'id' type. 194 mutable TypedefDecl *ObjCIdDecl; 195 196 /// \brief The typedef for the predefined 'SEL' type. 197 mutable TypedefDecl *ObjCSelDecl; 198 199 QualType ObjCProtoType; 200 const RecordType *ProtoStructType; 201 202 /// \brief The typedef for the predefined 'Class' type. 203 mutable TypedefDecl *ObjCClassDecl; 204 205 // Typedefs which may be provided defining the structure of Objective-C 206 // pseudo-builtins 207 QualType ObjCIdRedefinitionType; 208 QualType ObjCClassRedefinitionType; 209 QualType ObjCSelRedefinitionType; 210 211 QualType ObjCConstantStringType; 212 mutable RecordDecl *CFConstantStringTypeDecl; 213 214 /// \brief The typedef declaration for the Objective-C "instancetype" type. 215 TypedefDecl *ObjCInstanceTypeDecl; 216 217 /// \brief The type for the C FILE type. 218 TypeDecl *FILEDecl; 219 220 /// \brief The type for the C jmp_buf type. 221 TypeDecl *jmp_bufDecl; 222 223 /// \brief The type for the C sigjmp_buf type. 224 TypeDecl *sigjmp_bufDecl; 225 226 /// \brief Type for the Block descriptor for Blocks CodeGen. 227 /// 228 /// Since this is only used for generation of debug info, it is not 229 /// serialized. 230 mutable RecordDecl *BlockDescriptorType; 231 232 /// \brief Type for the Block descriptor for Blocks CodeGen. 233 /// 234 /// Since this is only used for generation of debug info, it is not 235 /// serialized. 236 mutable RecordDecl *BlockDescriptorExtendedType; 237 238 /// \brief Declaration for the CUDA cudaConfigureCall function. 239 FunctionDecl *cudaConfigureCallDecl; 240 241 TypeSourceInfo NullTypeSourceInfo; 242 243 /// \brief Keeps track of all declaration attributes. 244 /// 245 /// Since so few decls have attrs, we keep them in a hash map instead of 246 /// wasting space in the Decl class. 247 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 248 249 /// \brief Keeps track of the static data member templates from which 250 /// static data members of class template specializations were instantiated. 251 /// 252 /// This data structure stores the mapping from instantiations of static 253 /// data members to the static data member representations within the 254 /// class template from which they were instantiated along with the kind 255 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 256 /// 257 /// Given the following example: 258 /// 259 /// \code 260 /// template<typename T> 261 /// struct X { 262 /// static T value; 263 /// }; 264 /// 265 /// template<typename T> 266 /// T X<T>::value = T(17); 267 /// 268 /// int *x = &X<int>::value; 269 /// \endcode 270 /// 271 /// This mapping will contain an entry that maps from the VarDecl for 272 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 273 /// class template X) and will be marked TSK_ImplicitInstantiation. 274 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 275 InstantiatedFromStaticDataMember; 276 277 /// \brief Keeps track of the declaration from which a UsingDecl was 278 /// created during instantiation. The source declaration is always 279 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 280 /// UnresolvedUsingTypenameDecl. 281 /// 282 /// For example: 283 /// \code 284 /// template<typename T> 285 /// struct A { 286 /// void f(); 287 /// }; 288 /// 289 /// template<typename T> 290 /// struct B : A<T> { 291 /// using A<T>::f; 292 /// }; 293 /// 294 /// template struct B<int>; 295 /// \endcode 296 /// 297 /// This mapping will contain an entry that maps from the UsingDecl in 298 /// B<int> to the UnresolvedUsingDecl in B<T>. 299 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 300 301 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 302 InstantiatedFromUsingShadowDecl; 303 304 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 305 306 /// \brief Mapping that stores the methods overridden by a given C++ 307 /// member function. 308 /// 309 /// Since most C++ member functions aren't virtual and therefore 310 /// don't override anything, we store the overridden functions in 311 /// this map on the side rather than within the CXXMethodDecl structure. 312 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 313 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 314 315 TranslationUnitDecl *TUDecl; 316 317 /// SourceMgr - The associated SourceManager object. 318 SourceManager &SourceMgr; 319 320 /// LangOpts - The language options used to create the AST associated with 321 /// this ASTContext object. 322 LangOptions &LangOpts; 323 324 /// \brief The allocator used to create AST objects. 325 /// 326 /// AST objects are never destructed; rather, all memory associated with the 327 /// AST objects will be released when the ASTContext itself is destroyed. 328 mutable llvm::BumpPtrAllocator BumpAlloc; 329 330 /// \brief Allocator for partial diagnostics. 331 PartialDiagnostic::StorageAllocator DiagAllocator; 332 333 /// \brief The current C++ ABI. 334 llvm::OwningPtr<CXXABI> ABI; 335 CXXABI *createCXXABI(const TargetInfo &T); 336 337 /// \brief The logical -> physical address space map. 338 const LangAS::Map *AddrSpaceMap; 339 340 friend class ASTDeclReader; 341 friend class ASTReader; 342 friend class ASTWriter; 343 344 const TargetInfo *Target; 345public: 346 IdentifierTable &Idents; 347 SelectorTable &Selectors; 348 Builtin::Context &BuiltinInfo; 349 mutable DeclarationNameTable DeclarationNames; 350 llvm::OwningPtr<ExternalASTSource> ExternalSource; 351 ASTMutationListener *Listener; 352 clang::PrintingPolicy PrintingPolicy; 353 354 SourceManager& getSourceManager() { return SourceMgr; } 355 const SourceManager& getSourceManager() const { return SourceMgr; } 356 void *Allocate(unsigned Size, unsigned Align = 8) const { 357 return BumpAlloc.Allocate(Size, Align); 358 } 359 void Deallocate(void *Ptr) const { } 360 361 /// Return the total amount of physical memory allocated for representing 362 /// AST nodes and type information. 363 size_t getASTAllocatedMemory() const { 364 return BumpAlloc.getTotalMemory(); 365 } 366 /// Return the total memory used for various side tables. 367 size_t getSideTableAllocatedMemory() const; 368 369 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 370 return DiagAllocator; 371 } 372 373 const TargetInfo &getTargetInfo() const { return *Target; } 374 375 const LangOptions& getLangOptions() const { return LangOpts; } 376 377 Diagnostic &getDiagnostics() const; 378 379 FullSourceLoc getFullLoc(SourceLocation Loc) const { 380 return FullSourceLoc(Loc,SourceMgr); 381 } 382 383 /// \brief Retrieve the attributes for the given declaration. 384 AttrVec& getDeclAttrs(const Decl *D); 385 386 /// \brief Erase the attributes corresponding to the given declaration. 387 void eraseDeclAttrs(const Decl *D); 388 389 /// \brief If this variable is an instantiated static data member of a 390 /// class template specialization, returns the templated static data member 391 /// from which it was instantiated. 392 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 393 const VarDecl *Var); 394 395 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 396 397 void setClassScopeSpecializationPattern(FunctionDecl *FD, 398 FunctionDecl *Pattern); 399 400 /// \brief Note that the static data member \p Inst is an instantiation of 401 /// the static data member template \p Tmpl of a class template. 402 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 403 TemplateSpecializationKind TSK, 404 SourceLocation PointOfInstantiation = SourceLocation()); 405 406 /// \brief If the given using decl is an instantiation of a 407 /// (possibly unresolved) using decl from a template instantiation, 408 /// return it. 409 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 410 411 /// \brief Remember that the using decl \p Inst is an instantiation 412 /// of the using decl \p Pattern of a class template. 413 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 414 415 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 416 UsingShadowDecl *Pattern); 417 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 418 419 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 420 421 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 422 423 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 424 /// bitfield which follows the non-bitfield 'LastFD'. 425 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 426 const FieldDecl *LastFD) const; 427 428 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 429 /// bitfield which follows the bitfield 'LastFD'. 430 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 431 const FieldDecl *LastFD) const; 432 433 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 434 /// bitfield which follows the bitfield 'LastFD'. 435 bool BitfieldFollowsBitfield(const FieldDecl *FD, 436 const FieldDecl *LastFD) const; 437 438 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 439 /// bitfield which follows the bitfield 'LastFD'. 440 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 441 const FieldDecl *LastFD) const; 442 443 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 444 /// bitfield which follows the none bitfield 'LastFD'. 445 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 446 const FieldDecl *LastFD) const; 447 448 // Access to the set of methods overridden by the given C++ method. 449 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 450 overridden_cxx_method_iterator 451 overridden_methods_begin(const CXXMethodDecl *Method) const; 452 453 overridden_cxx_method_iterator 454 overridden_methods_end(const CXXMethodDecl *Method) const; 455 456 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 457 458 /// \brief Note that the given C++ \p Method overrides the given \p 459 /// Overridden method. 460 void addOverriddenMethod(const CXXMethodDecl *Method, 461 const CXXMethodDecl *Overridden); 462 463 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 464 465 466 // Builtin Types. 467 CanQualType VoidTy; 468 CanQualType BoolTy; 469 CanQualType CharTy; 470 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 471 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 472 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 473 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 474 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 475 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 476 CanQualType FloatTy, DoubleTy, LongDoubleTy; 477 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 478 CanQualType VoidPtrTy, NullPtrTy; 479 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 480 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 481 482 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 483 mutable QualType AutoDeductTy; // Deduction against 'auto'. 484 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 485 486 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 487 IdentifierTable &idents, SelectorTable &sels, 488 Builtin::Context &builtins, 489 unsigned size_reserve, 490 bool DelayInitialization = false); 491 492 ~ASTContext(); 493 494 /// \brief Attach an external AST source to the AST context. 495 /// 496 /// The external AST source provides the ability to load parts of 497 /// the abstract syntax tree as needed from some external storage, 498 /// e.g., a precompiled header. 499 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 500 501 /// \brief Retrieve a pointer to the external AST source associated 502 /// with this AST context, if any. 503 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 504 505 /// \brief Attach an AST mutation listener to the AST context. 506 /// 507 /// The AST mutation listener provides the ability to track modifications to 508 /// the abstract syntax tree entities committed after they were initially 509 /// created. 510 void setASTMutationListener(ASTMutationListener *Listener) { 511 this->Listener = Listener; 512 } 513 514 /// \brief Retrieve a pointer to the AST mutation listener associated 515 /// with this AST context, if any. 516 ASTMutationListener *getASTMutationListener() const { return Listener; } 517 518 void PrintStats() const; 519 const std::vector<Type*>& getTypes() const { return Types; } 520 521 /// \brief Retrieve the declaration for the 128-bit signed integer type. 522 TypedefDecl *getInt128Decl() const; 523 524 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 525 TypedefDecl *getUInt128Decl() const; 526 527 //===--------------------------------------------------------------------===// 528 // Type Constructors 529 //===--------------------------------------------------------------------===// 530 531private: 532 /// getExtQualType - Return a type with extended qualifiers. 533 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 534 535 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 536 537public: 538 /// getAddSpaceQualType - Return the uniqued reference to the type for an 539 /// address space qualified type with the specified type and address space. 540 /// The resulting type has a union of the qualifiers from T and the address 541 /// space. If T already has an address space specifier, it is silently 542 /// replaced. 543 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 544 545 /// getObjCGCQualType - Returns the uniqued reference to the type for an 546 /// objc gc qualified type. The retulting type has a union of the qualifiers 547 /// from T and the gc attribute. 548 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 549 550 /// getRestrictType - Returns the uniqued reference to the type for a 551 /// 'restrict' qualified type. The resulting type has a union of the 552 /// qualifiers from T and 'restrict'. 553 QualType getRestrictType(QualType T) const { 554 return T.withFastQualifiers(Qualifiers::Restrict); 555 } 556 557 /// getVolatileType - Returns the uniqued reference to the type for a 558 /// 'volatile' qualified type. The resulting type has a union of the 559 /// qualifiers from T and 'volatile'. 560 QualType getVolatileType(QualType T) const { 561 return T.withFastQualifiers(Qualifiers::Volatile); 562 } 563 564 /// getConstType - Returns the uniqued reference to the type for a 565 /// 'const' qualified type. The resulting type has a union of the 566 /// qualifiers from T and 'const'. 567 /// 568 /// It can be reasonably expected that this will always be 569 /// equivalent to calling T.withConst(). 570 QualType getConstType(QualType T) const { return T.withConst(); } 571 572 /// adjustFunctionType - Change the ExtInfo on a function type. 573 const FunctionType *adjustFunctionType(const FunctionType *Fn, 574 FunctionType::ExtInfo EInfo); 575 576 /// getComplexType - Return the uniqued reference to the type for a complex 577 /// number with the specified element type. 578 QualType getComplexType(QualType T) const; 579 CanQualType getComplexType(CanQualType T) const { 580 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 581 } 582 583 /// getPointerType - Return the uniqued reference to the type for a pointer to 584 /// the specified type. 585 QualType getPointerType(QualType T) const; 586 CanQualType getPointerType(CanQualType T) const { 587 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 588 } 589 590 /// getBlockPointerType - Return the uniqued reference to the type for a block 591 /// of the specified type. 592 QualType getBlockPointerType(QualType T) const; 593 594 /// This gets the struct used to keep track of the descriptor for pointer to 595 /// blocks. 596 QualType getBlockDescriptorType() const; 597 598 /// This gets the struct used to keep track of the extended descriptor for 599 /// pointer to blocks. 600 QualType getBlockDescriptorExtendedType() const; 601 602 void setcudaConfigureCallDecl(FunctionDecl *FD) { 603 cudaConfigureCallDecl = FD; 604 } 605 FunctionDecl *getcudaConfigureCallDecl() { 606 return cudaConfigureCallDecl; 607 } 608 609 /// This builds the struct used for __block variables. 610 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 611 612 /// Returns true iff we need copy/dispose helpers for the given type. 613 bool BlockRequiresCopying(QualType Ty) const; 614 615 /// getLValueReferenceType - Return the uniqued reference to the type for an 616 /// lvalue reference to the specified type. 617 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 618 const; 619 620 /// getRValueReferenceType - Return the uniqued reference to the type for an 621 /// rvalue reference to the specified type. 622 QualType getRValueReferenceType(QualType T) const; 623 624 /// getMemberPointerType - Return the uniqued reference to the type for a 625 /// member pointer to the specified type in the specified class. The class 626 /// is a Type because it could be a dependent name. 627 QualType getMemberPointerType(QualType T, const Type *Cls) const; 628 629 /// getVariableArrayType - Returns a non-unique reference to the type for a 630 /// variable array of the specified element type. 631 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 632 ArrayType::ArraySizeModifier ASM, 633 unsigned IndexTypeQuals, 634 SourceRange Brackets) const; 635 636 /// getDependentSizedArrayType - Returns a non-unique reference to 637 /// the type for a dependently-sized array of the specified element 638 /// type. FIXME: We will need these to be uniqued, or at least 639 /// comparable, at some point. 640 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 641 ArrayType::ArraySizeModifier ASM, 642 unsigned IndexTypeQuals, 643 SourceRange Brackets) const; 644 645 /// getIncompleteArrayType - Returns a unique reference to the type for a 646 /// incomplete array of the specified element type. 647 QualType getIncompleteArrayType(QualType EltTy, 648 ArrayType::ArraySizeModifier ASM, 649 unsigned IndexTypeQuals) const; 650 651 /// getConstantArrayType - Return the unique reference to the type for a 652 /// constant array of the specified element type. 653 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 654 ArrayType::ArraySizeModifier ASM, 655 unsigned IndexTypeQuals) const; 656 657 /// getVariableArrayDecayedType - Returns a vla type where known sizes 658 /// are replaced with [*]. 659 QualType getVariableArrayDecayedType(QualType Ty) const; 660 661 /// getVectorType - Return the unique reference to a vector type of 662 /// the specified element type and size. VectorType must be a built-in type. 663 QualType getVectorType(QualType VectorType, unsigned NumElts, 664 VectorType::VectorKind VecKind) const; 665 666 /// getExtVectorType - Return the unique reference to an extended vector type 667 /// of the specified element type and size. VectorType must be a built-in 668 /// type. 669 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 670 671 /// getDependentSizedExtVectorType - Returns a non-unique reference to 672 /// the type for a dependently-sized vector of the specified element 673 /// type. FIXME: We will need these to be uniqued, or at least 674 /// comparable, at some point. 675 QualType getDependentSizedExtVectorType(QualType VectorType, 676 Expr *SizeExpr, 677 SourceLocation AttrLoc) const; 678 679 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 680 /// 681 QualType getFunctionNoProtoType(QualType ResultTy, 682 const FunctionType::ExtInfo &Info) const; 683 684 QualType getFunctionNoProtoType(QualType ResultTy) const { 685 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 686 } 687 688 /// getFunctionType - Return a normal function type with a typed 689 /// argument list. 690 QualType getFunctionType(QualType ResultTy, 691 const QualType *Args, unsigned NumArgs, 692 const FunctionProtoType::ExtProtoInfo &EPI) const; 693 694 /// getTypeDeclType - Return the unique reference to the type for 695 /// the specified type declaration. 696 QualType getTypeDeclType(const TypeDecl *Decl, 697 const TypeDecl *PrevDecl = 0) const { 698 assert(Decl && "Passed null for Decl param"); 699 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 700 701 if (PrevDecl) { 702 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 703 Decl->TypeForDecl = PrevDecl->TypeForDecl; 704 return QualType(PrevDecl->TypeForDecl, 0); 705 } 706 707 return getTypeDeclTypeSlow(Decl); 708 } 709 710 /// getTypedefType - Return the unique reference to the type for the 711 /// specified typedef-name decl. 712 QualType getTypedefType(const TypedefNameDecl *Decl, 713 QualType Canon = QualType()) const; 714 715 QualType getRecordType(const RecordDecl *Decl) const; 716 717 QualType getEnumType(const EnumDecl *Decl) const; 718 719 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 720 721 QualType getAttributedType(AttributedType::Kind attrKind, 722 QualType modifiedType, 723 QualType equivalentType); 724 725 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 726 QualType Replacement) const; 727 QualType getSubstTemplateTypeParmPackType( 728 const TemplateTypeParmType *Replaced, 729 const TemplateArgument &ArgPack); 730 731 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 732 bool ParameterPack, 733 TemplateTypeParmDecl *ParmDecl = 0) const; 734 735 QualType getTemplateSpecializationType(TemplateName T, 736 const TemplateArgument *Args, 737 unsigned NumArgs, 738 QualType Canon = QualType()) const; 739 740 QualType getCanonicalTemplateSpecializationType(TemplateName T, 741 const TemplateArgument *Args, 742 unsigned NumArgs) const; 743 744 QualType getTemplateSpecializationType(TemplateName T, 745 const TemplateArgumentListInfo &Args, 746 QualType Canon = QualType()) const; 747 748 TypeSourceInfo * 749 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 750 const TemplateArgumentListInfo &Args, 751 QualType Canon = QualType()) const; 752 753 QualType getParenType(QualType NamedType) const; 754 755 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 756 NestedNameSpecifier *NNS, 757 QualType NamedType) const; 758 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 759 NestedNameSpecifier *NNS, 760 const IdentifierInfo *Name, 761 QualType Canon = QualType()) const; 762 763 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 764 NestedNameSpecifier *NNS, 765 const IdentifierInfo *Name, 766 const TemplateArgumentListInfo &Args) const; 767 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 768 NestedNameSpecifier *NNS, 769 const IdentifierInfo *Name, 770 unsigned NumArgs, 771 const TemplateArgument *Args) const; 772 773 QualType getPackExpansionType(QualType Pattern, 774 llvm::Optional<unsigned> NumExpansions); 775 776 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const; 777 778 QualType getObjCObjectType(QualType Base, 779 ObjCProtocolDecl * const *Protocols, 780 unsigned NumProtocols) const; 781 782 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 783 /// for the given ObjCObjectType. 784 QualType getObjCObjectPointerType(QualType OIT) const; 785 786 /// getTypeOfType - GCC extension. 787 QualType getTypeOfExprType(Expr *e) const; 788 QualType getTypeOfType(QualType t) const; 789 790 /// getDecltypeType - C++0x decltype. 791 QualType getDecltypeType(Expr *e) const; 792 793 /// getUnaryTransformType - unary type transforms 794 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 795 UnaryTransformType::UTTKind UKind) const; 796 797 /// getAutoType - C++0x deduced auto type. 798 QualType getAutoType(QualType DeducedType) const; 799 800 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 801 QualType getAutoDeductType() const; 802 803 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 804 QualType getAutoRRefDeductType() const; 805 806 /// getTagDeclType - Return the unique reference to the type for the 807 /// specified TagDecl (struct/union/class/enum) decl. 808 QualType getTagDeclType(const TagDecl *Decl) const; 809 810 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 811 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 812 CanQualType getSizeType() const; 813 814 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 815 /// returns a type compatible with the type defined in <stddef.h> as defined 816 /// by the target. 817 QualType getWCharType() const { return WCharTy; } 818 819 /// getSignedWCharType - Return the type of "signed wchar_t". 820 /// Used when in C++, as a GCC extension. 821 QualType getSignedWCharType() const; 822 823 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 824 /// Used when in C++, as a GCC extension. 825 QualType getUnsignedWCharType() const; 826 827 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 828 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 829 QualType getPointerDiffType() const; 830 831 // getCFConstantStringType - Return the C structure type used to represent 832 // constant CFStrings. 833 QualType getCFConstantStringType() const; 834 835 /// Get the structure type used to representation CFStrings, or NULL 836 /// if it hasn't yet been built. 837 QualType getRawCFConstantStringType() const { 838 if (CFConstantStringTypeDecl) 839 return getTagDeclType(CFConstantStringTypeDecl); 840 return QualType(); 841 } 842 void setCFConstantStringType(QualType T); 843 844 // This setter/getter represents the ObjC type for an NSConstantString. 845 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 846 QualType getObjCConstantStringInterface() const { 847 return ObjCConstantStringType; 848 } 849 850 /// \brief Retrieve the type that 'id' has been defined to, which may be 851 /// different from the built-in 'id' if 'id' has been typedef'd. 852 QualType getObjCIdRedefinitionType() const { 853 if (ObjCIdRedefinitionType.isNull()) 854 return getObjCIdType(); 855 return ObjCIdRedefinitionType; 856 } 857 858 /// \brief Set the user-written type that redefines 'id'. 859 void setObjCIdRedefinitionType(QualType RedefType) { 860 ObjCIdRedefinitionType = RedefType; 861 } 862 863 /// \brief Retrieve the type that 'Class' has been defined to, which may be 864 /// different from the built-in 'Class' if 'Class' has been typedef'd. 865 QualType getObjCClassRedefinitionType() const { 866 if (ObjCClassRedefinitionType.isNull()) 867 return getObjCClassType(); 868 return ObjCClassRedefinitionType; 869 } 870 871 /// \brief Set the user-written type that redefines 'SEL'. 872 void setObjCClassRedefinitionType(QualType RedefType) { 873 ObjCClassRedefinitionType = RedefType; 874 } 875 876 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 877 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 878 QualType getObjCSelRedefinitionType() const { 879 if (ObjCSelRedefinitionType.isNull()) 880 return getObjCSelType(); 881 return ObjCSelRedefinitionType; 882 } 883 884 885 /// \brief Set the user-written type that redefines 'SEL'. 886 void setObjCSelRedefinitionType(QualType RedefType) { 887 ObjCSelRedefinitionType = RedefType; 888 } 889 890 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 891 /// otherwise, returns a NULL type; 892 QualType getObjCInstanceType() { 893 return getTypeDeclType(getObjCInstanceTypeDecl()); 894 } 895 896 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 897 /// "instancetype" type. 898 TypedefDecl *getObjCInstanceTypeDecl(); 899 900 /// \brief Set the type for the C FILE type. 901 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 902 903 /// \brief Retrieve the C FILE type. 904 QualType getFILEType() const { 905 if (FILEDecl) 906 return getTypeDeclType(FILEDecl); 907 return QualType(); 908 } 909 910 /// \brief Set the type for the C jmp_buf type. 911 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 912 this->jmp_bufDecl = jmp_bufDecl; 913 } 914 915 /// \brief Retrieve the C jmp_buf type. 916 QualType getjmp_bufType() const { 917 if (jmp_bufDecl) 918 return getTypeDeclType(jmp_bufDecl); 919 return QualType(); 920 } 921 922 /// \brief Set the type for the C sigjmp_buf type. 923 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 924 this->sigjmp_bufDecl = sigjmp_bufDecl; 925 } 926 927 /// \brief Retrieve the C sigjmp_buf type. 928 QualType getsigjmp_bufType() const { 929 if (sigjmp_bufDecl) 930 return getTypeDeclType(sigjmp_bufDecl); 931 return QualType(); 932 } 933 934 /// \brief The result type of logical operations, '<', '>', '!=', etc. 935 QualType getLogicalOperationType() const { 936 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 937 } 938 939 /// getObjCEncodingForType - Emit the ObjC type encoding for the 940 /// given type into \arg S. If \arg NameFields is specified then 941 /// record field names are also encoded. 942 void getObjCEncodingForType(QualType t, std::string &S, 943 const FieldDecl *Field=0) const; 944 945 void getLegacyIntegralTypeEncoding(QualType &t) const; 946 947 // Put the string version of type qualifiers into S. 948 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 949 std::string &S) const; 950 951 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 952 /// function. This is in the same format as Objective-C method encodings. 953 /// 954 /// \returns true if an error occurred (e.g., because one of the parameter 955 /// types is incomplete), false otherwise. 956 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 957 958 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 959 /// declaration. 960 /// 961 /// \returns true if an error occurred (e.g., because one of the parameter 962 /// types is incomplete), false otherwise. 963 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S) 964 const; 965 966 /// getObjCEncodingForBlock - Return the encoded type for this block 967 /// declaration. 968 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 969 970 /// getObjCEncodingForPropertyDecl - Return the encoded type for 971 /// this method declaration. If non-NULL, Container must be either 972 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 973 /// only be NULL when getting encodings for protocol properties. 974 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 975 const Decl *Container, 976 std::string &S) const; 977 978 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 979 ObjCProtocolDecl *rProto) const; 980 981 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 982 /// purpose in characters. 983 CharUnits getObjCEncodingTypeSize(QualType t) const; 984 985 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 986 /// in Objective-C. 987 TypedefDecl *getObjCIdDecl() const; 988 989 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 990 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 991 QualType getObjCIdType() const { 992 return getTypeDeclType(getObjCIdDecl()); 993 } 994 995 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 996 /// in Objective-C. 997 TypedefDecl *getObjCSelDecl() const; 998 999 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1000 /// 'SEL' type. 1001 QualType getObjCSelType() const { 1002 return getTypeDeclType(getObjCSelDecl()); 1003 } 1004 1005 void setObjCProtoType(QualType QT); 1006 QualType getObjCProtoType() const { return ObjCProtoType; } 1007 1008 /// \brief Retrieve the typedef declaration corresponding to the predefined 1009 /// Objective-C 'Class' type. 1010 TypedefDecl *getObjCClassDecl() const; 1011 1012 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1013 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1014 /// struct. 1015 QualType getObjCClassType() const { 1016 return getTypeDeclType(getObjCClassDecl()); 1017 } 1018 1019 void setBuiltinVaListType(QualType T); 1020 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 1021 1022 /// getCVRQualifiedType - Returns a type with additional const, 1023 /// volatile, or restrict qualifiers. 1024 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1025 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1026 } 1027 1028 /// getQualifiedType - Returns a type with additional qualifiers. 1029 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1030 if (!Qs.hasNonFastQualifiers()) 1031 return T.withFastQualifiers(Qs.getFastQualifiers()); 1032 QualifierCollector Qc(Qs); 1033 const Type *Ptr = Qc.strip(T); 1034 return getExtQualType(Ptr, Qc); 1035 } 1036 1037 /// getQualifiedType - Returns a type with additional qualifiers. 1038 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1039 if (!Qs.hasNonFastQualifiers()) 1040 return QualType(T, Qs.getFastQualifiers()); 1041 return getExtQualType(T, Qs); 1042 } 1043 1044 /// getLifetimeQualifiedType - Returns a type with the given 1045 /// lifetime qualifier. 1046 QualType getLifetimeQualifiedType(QualType type, 1047 Qualifiers::ObjCLifetime lifetime) { 1048 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1049 assert(lifetime != Qualifiers::OCL_None); 1050 1051 Qualifiers qs; 1052 qs.addObjCLifetime(lifetime); 1053 return getQualifiedType(type, qs); 1054 } 1055 1056 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1057 SourceLocation NameLoc) const; 1058 1059 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1060 UnresolvedSetIterator End) const; 1061 1062 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1063 bool TemplateKeyword, 1064 TemplateDecl *Template) const; 1065 1066 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1067 const IdentifierInfo *Name) const; 1068 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1069 OverloadedOperatorKind Operator) const; 1070 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1071 TemplateName replacement) const; 1072 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1073 const TemplateArgument &ArgPack) const; 1074 1075 enum GetBuiltinTypeError { 1076 GE_None, //< No error 1077 GE_Missing_stdio, //< Missing a type from <stdio.h> 1078 GE_Missing_setjmp //< Missing a type from <setjmp.h> 1079 }; 1080 1081 /// GetBuiltinType - Return the type for the specified builtin. If 1082 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1083 /// arguments to the builtin that are required to be integer constant 1084 /// expressions. 1085 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1086 unsigned *IntegerConstantArgs = 0) const; 1087 1088private: 1089 CanQualType getFromTargetType(unsigned Type) const; 1090 1091 //===--------------------------------------------------------------------===// 1092 // Type Predicates. 1093 //===--------------------------------------------------------------------===// 1094 1095public: 1096 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1097 /// garbage collection attribute. 1098 /// 1099 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1100 1101 /// areCompatibleVectorTypes - Return true if the given vector types 1102 /// are of the same unqualified type or if they are equivalent to the same 1103 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1104 /// Neon) types. 1105 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1106 1107 /// isObjCNSObjectType - Return true if this is an NSObject object with 1108 /// its NSObject attribute set. 1109 static bool isObjCNSObjectType(QualType Ty) { 1110 return Ty->isObjCNSObjectType(); 1111 } 1112 1113 //===--------------------------------------------------------------------===// 1114 // Type Sizing and Analysis 1115 //===--------------------------------------------------------------------===// 1116 1117 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1118 /// scalar floating point type. 1119 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1120 1121 /// getTypeInfo - Get the size and alignment of the specified complete type in 1122 /// bits. 1123 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1124 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1125 return getTypeInfo(T.getTypePtr()); 1126 } 1127 1128 /// getTypeSize - Return the size of the specified type, in bits. This method 1129 /// does not work on incomplete types. 1130 uint64_t getTypeSize(QualType T) const { 1131 return getTypeInfo(T).first; 1132 } 1133 uint64_t getTypeSize(const Type *T) const { 1134 return getTypeInfo(T).first; 1135 } 1136 1137 /// getCharWidth - Return the size of the character type, in bits 1138 uint64_t getCharWidth() const { 1139 return getTypeSize(CharTy); 1140 } 1141 1142 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1143 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1144 1145 /// toBits - Convert a size in characters to a size in bits. 1146 int64_t toBits(CharUnits CharSize) const; 1147 1148 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1149 /// This method does not work on incomplete types. 1150 CharUnits getTypeSizeInChars(QualType T) const; 1151 CharUnits getTypeSizeInChars(const Type *T) const; 1152 1153 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1154 /// This method does not work on incomplete types. 1155 unsigned getTypeAlign(QualType T) const { 1156 return getTypeInfo(T).second; 1157 } 1158 unsigned getTypeAlign(const Type *T) const { 1159 return getTypeInfo(T).second; 1160 } 1161 1162 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1163 /// characters. This method does not work on incomplete types. 1164 CharUnits getTypeAlignInChars(QualType T) const; 1165 CharUnits getTypeAlignInChars(const Type *T) const; 1166 1167 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1168 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1169 1170 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1171 /// type for the current target in bits. This can be different than the ABI 1172 /// alignment in cases where it is beneficial for performance to overalign 1173 /// a data type. 1174 unsigned getPreferredTypeAlign(const Type *T) const; 1175 1176 /// getDeclAlign - Return a conservative estimate of the alignment of 1177 /// the specified decl. Note that bitfields do not have a valid alignment, so 1178 /// this method will assert on them. 1179 /// If @p RefAsPointee, references are treated like their underlying type 1180 /// (for alignof), else they're treated like pointers (for CodeGen). 1181 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1182 1183 /// getASTRecordLayout - Get or compute information about the layout of the 1184 /// specified record (struct/union/class), which indicates its size and field 1185 /// position information. 1186 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1187 1188 /// getASTObjCInterfaceLayout - Get or compute information about the 1189 /// layout of the specified Objective-C interface. 1190 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1191 const; 1192 1193 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS) const; 1194 1195 /// getASTObjCImplementationLayout - Get or compute information about 1196 /// the layout of the specified Objective-C implementation. This may 1197 /// differ from the interface if synthesized ivars are present. 1198 const ASTRecordLayout & 1199 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1200 1201 /// getKeyFunction - Get the key function for the given record decl, or NULL 1202 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1203 /// section 5.2.3: 1204 /// 1205 /// ...the first non-pure virtual function that is not inline at the point 1206 /// of class definition. 1207 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1208 1209 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1210 1211 MangleContext *createMangleContext(); 1212 1213 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1214 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1215 1216 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1217 void CollectInheritedProtocols(const Decl *CDecl, 1218 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1219 1220 //===--------------------------------------------------------------------===// 1221 // Type Operators 1222 //===--------------------------------------------------------------------===// 1223 1224 /// getCanonicalType - Return the canonical (structural) type corresponding to 1225 /// the specified potentially non-canonical type. The non-canonical version 1226 /// of a type may have many "decorated" versions of types. Decorators can 1227 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1228 /// to be free of any of these, allowing two canonical types to be compared 1229 /// for exact equality with a simple pointer comparison. 1230 CanQualType getCanonicalType(QualType T) const { 1231 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1232 } 1233 1234 const Type *getCanonicalType(const Type *T) const { 1235 return T->getCanonicalTypeInternal().getTypePtr(); 1236 } 1237 1238 /// getCanonicalParamType - Return the canonical parameter type 1239 /// corresponding to the specific potentially non-canonical one. 1240 /// Qualifiers are stripped off, functions are turned into function 1241 /// pointers, and arrays decay one level into pointers. 1242 CanQualType getCanonicalParamType(QualType T) const; 1243 1244 /// \brief Determine whether the given types are equivalent. 1245 bool hasSameType(QualType T1, QualType T2) { 1246 return getCanonicalType(T1) == getCanonicalType(T2); 1247 } 1248 1249 /// \brief Returns this type as a completely-unqualified array type, 1250 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1251 /// sugaring from the types, similar to the behavior of 1252 /// QualType::getUnqualifiedType(). 1253 /// 1254 /// \param T is the qualified type, which may be an ArrayType 1255 /// 1256 /// \param Quals will receive the full set of qualifiers that were 1257 /// applied to the array. 1258 /// 1259 /// \returns if this is an array type, the completely unqualified array type 1260 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1261 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1262 1263 /// \brief Determine whether the given types are equivalent after 1264 /// cvr-qualifiers have been removed. 1265 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1266 return getCanonicalType(T1).getTypePtr() == 1267 getCanonicalType(T2).getTypePtr(); 1268 } 1269 1270 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1271 1272 /// \brief Retrieves the "canonical" nested name specifier for a 1273 /// given nested name specifier. 1274 /// 1275 /// The canonical nested name specifier is a nested name specifier 1276 /// that uniquely identifies a type or namespace within the type 1277 /// system. For example, given: 1278 /// 1279 /// \code 1280 /// namespace N { 1281 /// struct S { 1282 /// template<typename T> struct X { typename T* type; }; 1283 /// }; 1284 /// } 1285 /// 1286 /// template<typename T> struct Y { 1287 /// typename N::S::X<T>::type member; 1288 /// }; 1289 /// \endcode 1290 /// 1291 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1292 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1293 /// by declarations in the type system and the canonical type for 1294 /// the template type parameter 'T' is template-param-0-0. 1295 NestedNameSpecifier * 1296 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1297 1298 /// \brief Retrieves the default calling convention to use for 1299 /// C++ instance methods. 1300 CallingConv getDefaultMethodCallConv(); 1301 1302 /// \brief Retrieves the canonical representation of the given 1303 /// calling convention. 1304 CallingConv getCanonicalCallConv(CallingConv CC) const { 1305 if (!LangOpts.MRTD && CC == CC_C) 1306 return CC_Default; 1307 return CC; 1308 } 1309 1310 /// \brief Determines whether two calling conventions name the same 1311 /// calling convention. 1312 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1313 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1314 } 1315 1316 /// \brief Retrieves the "canonical" template name that refers to a 1317 /// given template. 1318 /// 1319 /// The canonical template name is the simplest expression that can 1320 /// be used to refer to a given template. For most templates, this 1321 /// expression is just the template declaration itself. For example, 1322 /// the template std::vector can be referred to via a variety of 1323 /// names---std::vector, ::std::vector, vector (if vector is in 1324 /// scope), etc.---but all of these names map down to the same 1325 /// TemplateDecl, which is used to form the canonical template name. 1326 /// 1327 /// Dependent template names are more interesting. Here, the 1328 /// template name could be something like T::template apply or 1329 /// std::allocator<T>::template rebind, where the nested name 1330 /// specifier itself is dependent. In this case, the canonical 1331 /// template name uses the shortest form of the dependent 1332 /// nested-name-specifier, which itself contains all canonical 1333 /// types, values, and templates. 1334 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1335 1336 /// \brief Determine whether the given template names refer to the same 1337 /// template. 1338 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1339 1340 /// \brief Retrieve the "canonical" template argument. 1341 /// 1342 /// The canonical template argument is the simplest template argument 1343 /// (which may be a type, value, expression, or declaration) that 1344 /// expresses the value of the argument. 1345 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1346 const; 1347 1348 /// Type Query functions. If the type is an instance of the specified class, 1349 /// return the Type pointer for the underlying maximally pretty type. This 1350 /// is a member of ASTContext because this may need to do some amount of 1351 /// canonicalization, e.g. to move type qualifiers into the element type. 1352 const ArrayType *getAsArrayType(QualType T) const; 1353 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1354 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1355 } 1356 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1357 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1358 } 1359 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1360 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1361 } 1362 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1363 const { 1364 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1365 } 1366 1367 /// getBaseElementType - Returns the innermost element type of an array type. 1368 /// For example, will return "int" for int[m][n] 1369 QualType getBaseElementType(const ArrayType *VAT) const; 1370 1371 /// getBaseElementType - Returns the innermost element type of a type 1372 /// (which needn't actually be an array type). 1373 QualType getBaseElementType(QualType QT) const; 1374 1375 /// getConstantArrayElementCount - Returns number of constant array elements. 1376 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1377 1378 /// \brief Perform adjustment on the parameter type of a function. 1379 /// 1380 /// This routine adjusts the given parameter type @p T to the actual 1381 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1382 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1383 QualType getAdjustedParameterType(QualType T); 1384 1385 /// \brief Retrieve the parameter type as adjusted for use in the signature 1386 /// of a function, decaying array and function types and removing top-level 1387 /// cv-qualifiers. 1388 QualType getSignatureParameterType(QualType T); 1389 1390 /// getArrayDecayedType - Return the properly qualified result of decaying the 1391 /// specified array type to a pointer. This operation is non-trivial when 1392 /// handling typedefs etc. The canonical type of "T" must be an array type, 1393 /// this returns a pointer to a properly qualified element of the array. 1394 /// 1395 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1396 QualType getArrayDecayedType(QualType T) const; 1397 1398 /// getPromotedIntegerType - Returns the type that Promotable will 1399 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1400 /// integer type. 1401 QualType getPromotedIntegerType(QualType PromotableType) const; 1402 1403 /// \brief Recurses in pointer/array types until it finds an objc retainable 1404 /// type and returns its ownership. 1405 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1406 1407 /// \brief Whether this is a promotable bitfield reference according 1408 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1409 /// 1410 /// \returns the type this bit-field will promote to, or NULL if no 1411 /// promotion occurs. 1412 QualType isPromotableBitField(Expr *E) const; 1413 1414 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1415 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1416 /// LHS < RHS, return -1. 1417 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1418 1419 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1420 /// point types, ignoring the domain of the type (i.e. 'double' == 1421 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1422 /// LHS < RHS, return -1. 1423 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1424 1425 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1426 /// point or a complex type (based on typeDomain/typeSize). 1427 /// 'typeDomain' is a real floating point or complex type. 1428 /// 'typeSize' is a real floating point or complex type. 1429 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1430 QualType typeDomain) const; 1431 1432 unsigned getTargetAddressSpace(QualType T) const { 1433 return getTargetAddressSpace(T.getQualifiers()); 1434 } 1435 1436 unsigned getTargetAddressSpace(Qualifiers Q) const { 1437 return getTargetAddressSpace(Q.getAddressSpace()); 1438 } 1439 1440 unsigned getTargetAddressSpace(unsigned AS) const { 1441 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1442 return AS; 1443 else 1444 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1445 } 1446 1447private: 1448 // Helper for integer ordering 1449 unsigned getIntegerRank(const Type *T) const; 1450 1451public: 1452 1453 //===--------------------------------------------------------------------===// 1454 // Type Compatibility Predicates 1455 //===--------------------------------------------------------------------===// 1456 1457 /// Compatibility predicates used to check assignment expressions. 1458 bool typesAreCompatible(QualType T1, QualType T2, 1459 bool CompareUnqualified = false); // C99 6.2.7p1 1460 1461 bool propertyTypesAreCompatible(QualType, QualType); 1462 bool typesAreBlockPointerCompatible(QualType, QualType); 1463 1464 bool isObjCIdType(QualType T) const { 1465 return T == getObjCIdType(); 1466 } 1467 bool isObjCClassType(QualType T) const { 1468 return T == getObjCClassType(); 1469 } 1470 bool isObjCSelType(QualType T) const { 1471 return T == getObjCSelType(); 1472 } 1473 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1474 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1475 bool ForCompare); 1476 1477 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1478 1479 // Check the safety of assignment from LHS to RHS 1480 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1481 const ObjCObjectPointerType *RHSOPT); 1482 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1483 const ObjCObjectType *RHS); 1484 bool canAssignObjCInterfacesInBlockPointer( 1485 const ObjCObjectPointerType *LHSOPT, 1486 const ObjCObjectPointerType *RHSOPT, 1487 bool BlockReturnType); 1488 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1489 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1490 const ObjCObjectPointerType *RHSOPT); 1491 bool canBindObjCObjectType(QualType To, QualType From); 1492 1493 // Functions for calculating composite types 1494 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1495 bool Unqualified = false, bool BlockReturnType = false); 1496 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1497 bool Unqualified = false); 1498 QualType mergeFunctionArgumentTypes(QualType, QualType, 1499 bool OfBlockPointer=false, 1500 bool Unqualified = false); 1501 QualType mergeTransparentUnionType(QualType, QualType, 1502 bool OfBlockPointer=false, 1503 bool Unqualified = false); 1504 1505 QualType mergeObjCGCQualifiers(QualType, QualType); 1506 1507 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1508 ObjCLayouts[CD] = 0; 1509 } 1510 1511 //===--------------------------------------------------------------------===// 1512 // Integer Predicates 1513 //===--------------------------------------------------------------------===// 1514 1515 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1516 // of bits in an integer type excluding any padding bits. 1517 unsigned getIntWidth(QualType T) const; 1518 1519 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1520 // unsigned integer type. This method takes a signed type, and returns the 1521 // corresponding unsigned integer type. 1522 QualType getCorrespondingUnsignedType(QualType T); 1523 1524 //===--------------------------------------------------------------------===// 1525 // Type Iterators. 1526 //===--------------------------------------------------------------------===// 1527 1528 typedef std::vector<Type*>::iterator type_iterator; 1529 typedef std::vector<Type*>::const_iterator const_type_iterator; 1530 1531 type_iterator types_begin() { return Types.begin(); } 1532 type_iterator types_end() { return Types.end(); } 1533 const_type_iterator types_begin() const { return Types.begin(); } 1534 const_type_iterator types_end() const { return Types.end(); } 1535 1536 //===--------------------------------------------------------------------===// 1537 // Integer Values 1538 //===--------------------------------------------------------------------===// 1539 1540 /// MakeIntValue - Make an APSInt of the appropriate width and 1541 /// signedness for the given \arg Value and integer \arg Type. 1542 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1543 llvm::APSInt Res(getIntWidth(Type), 1544 !Type->isSignedIntegerOrEnumerationType()); 1545 Res = Value; 1546 return Res; 1547 } 1548 1549 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1550 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1551 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1552 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1553 1554 /// \brief returns true if there is at lease one @implementation in TU. 1555 bool AnyObjCImplementation() { 1556 return !ObjCImpls.empty(); 1557 } 1558 1559 /// \brief Set the implementation of ObjCInterfaceDecl. 1560 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1561 ObjCImplementationDecl *ImplD); 1562 /// \brief Set the implementation of ObjCCategoryDecl. 1563 void setObjCImplementation(ObjCCategoryDecl *CatD, 1564 ObjCCategoryImplDecl *ImplD); 1565 1566 /// \brief Set the copy inialization expression of a block var decl. 1567 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1568 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1569 /// none exists. 1570 Expr *getBlockVarCopyInits(const VarDecl*VD); 1571 1572 /// \brief Allocate an uninitialized TypeSourceInfo. 1573 /// 1574 /// The caller should initialize the memory held by TypeSourceInfo using 1575 /// the TypeLoc wrappers. 1576 /// 1577 /// \param T the type that will be the basis for type source info. This type 1578 /// should refer to how the declarator was written in source code, not to 1579 /// what type semantic analysis resolved the declarator to. 1580 /// 1581 /// \param Size the size of the type info to create, or 0 if the size 1582 /// should be calculated based on the type. 1583 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1584 1585 /// \brief Allocate a TypeSourceInfo where all locations have been 1586 /// initialized to a given location, which defaults to the empty 1587 /// location. 1588 TypeSourceInfo * 1589 getTrivialTypeSourceInfo(QualType T, 1590 SourceLocation Loc = SourceLocation()) const; 1591 1592 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1593 1594 /// \brief Add a deallocation callback that will be invoked when the 1595 /// ASTContext is destroyed. 1596 /// 1597 /// \brief Callback A callback function that will be invoked on destruction. 1598 /// 1599 /// \brief Data Pointer data that will be provided to the callback function 1600 /// when it is called. 1601 void AddDeallocation(void (*Callback)(void*), void *Data); 1602 1603 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1604 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1605 1606 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1607 /// lazily, only when used; this is only relevant for function or file scoped 1608 /// var definitions. 1609 /// 1610 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1611 /// it is not used. 1612 bool DeclMustBeEmitted(const Decl *D); 1613 1614 //===--------------------------------------------------------------------===// 1615 // Statistics 1616 //===--------------------------------------------------------------------===// 1617 1618 /// \brief The number of implicitly-declared default constructors. 1619 static unsigned NumImplicitDefaultConstructors; 1620 1621 /// \brief The number of implicitly-declared default constructors for 1622 /// which declarations were built. 1623 static unsigned NumImplicitDefaultConstructorsDeclared; 1624 1625 /// \brief The number of implicitly-declared copy constructors. 1626 static unsigned NumImplicitCopyConstructors; 1627 1628 /// \brief The number of implicitly-declared copy constructors for 1629 /// which declarations were built. 1630 static unsigned NumImplicitCopyConstructorsDeclared; 1631 1632 /// \brief The number of implicitly-declared move constructors. 1633 static unsigned NumImplicitMoveConstructors; 1634 1635 /// \brief The number of implicitly-declared move constructors for 1636 /// which declarations were built. 1637 static unsigned NumImplicitMoveConstructorsDeclared; 1638 1639 /// \brief The number of implicitly-declared copy assignment operators. 1640 static unsigned NumImplicitCopyAssignmentOperators; 1641 1642 /// \brief The number of implicitly-declared copy assignment operators for 1643 /// which declarations were built. 1644 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1645 1646 /// \brief The number of implicitly-declared move assignment operators. 1647 static unsigned NumImplicitMoveAssignmentOperators; 1648 1649 /// \brief The number of implicitly-declared move assignment operators for 1650 /// which declarations were built. 1651 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1652 1653 /// \brief The number of implicitly-declared destructors. 1654 static unsigned NumImplicitDestructors; 1655 1656 /// \brief The number of implicitly-declared destructors for which 1657 /// declarations were built. 1658 static unsigned NumImplicitDestructorsDeclared; 1659 1660private: 1661 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1662 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1663 1664public: 1665 /// \brief Initialize built-in types. 1666 /// 1667 /// This routine may only be invoked once for a given ASTContext object. 1668 /// It is normally invoked by the ASTContext constructor. However, the 1669 /// constructor can be asked to delay initialization, which places the burden 1670 /// of calling this function on the user of that object. 1671 /// 1672 /// \param Target The target 1673 void InitBuiltinTypes(const TargetInfo &Target); 1674 1675private: 1676 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1677 1678 // Return the ObjC type encoding for a given type. 1679 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1680 bool ExpandPointedToStructures, 1681 bool ExpandStructures, 1682 const FieldDecl *Field, 1683 bool OutermostType = false, 1684 bool EncodingProperty = false, 1685 bool StructField = false) const; 1686 1687 // Adds the encoding of the structure's members. 1688 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1689 const FieldDecl *Field, 1690 bool includeVBases = true) const; 1691 1692 const ASTRecordLayout & 1693 getObjCLayout(const ObjCInterfaceDecl *D, 1694 const ObjCImplementationDecl *Impl) const; 1695 1696private: 1697 /// \brief A set of deallocations that should be performed when the 1698 /// ASTContext is destroyed. 1699 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1700 1701 // FIXME: This currently contains the set of StoredDeclMaps used 1702 // by DeclContext objects. This probably should not be in ASTContext, 1703 // but we include it here so that ASTContext can quickly deallocate them. 1704 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1705 1706 /// \brief A counter used to uniquely identify "blocks". 1707 mutable unsigned int UniqueBlockByRefTypeID; 1708 1709 friend class DeclContext; 1710 friend class DeclarationNameTable; 1711 void ReleaseDeclContextMaps(); 1712}; 1713 1714/// @brief Utility function for constructing a nullary selector. 1715static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 1716 IdentifierInfo* II = &Ctx.Idents.get(name); 1717 return Ctx.Selectors.getSelector(0, &II); 1718} 1719 1720/// @brief Utility function for constructing an unary selector. 1721static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 1722 IdentifierInfo* II = &Ctx.Idents.get(name); 1723 return Ctx.Selectors.getSelector(1, &II); 1724} 1725 1726} // end namespace clang 1727 1728// operator new and delete aren't allowed inside namespaces. 1729// The throw specifications are mandated by the standard. 1730/// @brief Placement new for using the ASTContext's allocator. 1731/// 1732/// This placement form of operator new uses the ASTContext's allocator for 1733/// obtaining memory. It is a non-throwing new, which means that it returns 1734/// null on error. (If that is what the allocator does. The current does, so if 1735/// this ever changes, this operator will have to be changed, too.) 1736/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1737/// @code 1738/// // Default alignment (8) 1739/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1740/// // Specific alignment 1741/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1742/// @endcode 1743/// Please note that you cannot use delete on the pointer; it must be 1744/// deallocated using an explicit destructor call followed by 1745/// @c Context.Deallocate(Ptr). 1746/// 1747/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1748/// @param C The ASTContext that provides the allocator. 1749/// @param Alignment The alignment of the allocated memory (if the underlying 1750/// allocator supports it). 1751/// @return The allocated memory. Could be NULL. 1752inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1753 size_t Alignment) throw () { 1754 return C.Allocate(Bytes, Alignment); 1755} 1756/// @brief Placement delete companion to the new above. 1757/// 1758/// This operator is just a companion to the new above. There is no way of 1759/// invoking it directly; see the new operator for more details. This operator 1760/// is called implicitly by the compiler if a placement new expression using 1761/// the ASTContext throws in the object constructor. 1762inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1763 throw () { 1764 C.Deallocate(Ptr); 1765} 1766 1767/// This placement form of operator new[] uses the ASTContext's allocator for 1768/// obtaining memory. It is a non-throwing new[], which means that it returns 1769/// null on error. 1770/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1771/// @code 1772/// // Default alignment (8) 1773/// char *data = new (Context) char[10]; 1774/// // Specific alignment 1775/// char *data = new (Context, 4) char[10]; 1776/// @endcode 1777/// Please note that you cannot use delete on the pointer; it must be 1778/// deallocated using an explicit destructor call followed by 1779/// @c Context.Deallocate(Ptr). 1780/// 1781/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1782/// @param C The ASTContext that provides the allocator. 1783/// @param Alignment The alignment of the allocated memory (if the underlying 1784/// allocator supports it). 1785/// @return The allocated memory. Could be NULL. 1786inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1787 size_t Alignment = 8) throw () { 1788 return C.Allocate(Bytes, Alignment); 1789} 1790 1791/// @brief Placement delete[] companion to the new[] above. 1792/// 1793/// This operator is just a companion to the new[] above. There is no way of 1794/// invoking it directly; see the new[] operator for more details. This operator 1795/// is called implicitly by the compiler if a placement new[] expression using 1796/// the ASTContext throws in the object constructor. 1797inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1798 throw () { 1799 C.Deallocate(Ptr); 1800} 1801 1802#endif 1803