ASTContext.h revision ca63c200346c0ca9e00194ec6e34a5a7b0ed9321
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 class raw_ostream; 41} 42 43namespace clang { 44 class FileManager; 45 class ASTRecordLayout; 46 class BlockExpr; 47 class CharUnits; 48 class Diagnostic; 49 class Expr; 50 class ExternalASTSource; 51 class ASTMutationListener; 52 class IdentifierTable; 53 class SelectorTable; 54 class SourceManager; 55 class TargetInfo; 56 class CXXABI; 57 // Decls 58 class DeclContext; 59 class CXXMethodDecl; 60 class CXXRecordDecl; 61 class Decl; 62 class FieldDecl; 63 class MangleContext; 64 class ObjCIvarDecl; 65 class ObjCIvarRefExpr; 66 class ObjCPropertyDecl; 67 class RecordDecl; 68 class StoredDeclsMap; 69 class TagDecl; 70 class TemplateTemplateParmDecl; 71 class TemplateTypeParmDecl; 72 class TranslationUnitDecl; 73 class TypeDecl; 74 class TypedefNameDecl; 75 class UsingDecl; 76 class UsingShadowDecl; 77 class UnresolvedSetIterator; 78 79 namespace Builtin { class Context; } 80 81/// ASTContext - This class holds long-lived AST nodes (such as types and 82/// decls) that can be referred to throughout the semantic analysis of a file. 83class ASTContext : public llvm::RefCountedBase<ASTContext> { 84 ASTContext &this_() { return *this; } 85 86 mutable std::vector<Type*> Types; 87 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 88 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 89 mutable llvm::FoldingSet<PointerType> PointerTypes; 90 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 91 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 92 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 93 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 94 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 95 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 96 mutable std::vector<VariableArrayType*> VariableArrayTypes; 97 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 98 mutable llvm::FoldingSet<DependentSizedExtVectorType> 99 DependentSizedExtVectorTypes; 100 mutable llvm::FoldingSet<VectorType> VectorTypes; 101 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 102 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 103 FunctionProtoTypes; 104 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 105 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 106 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 107 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 108 SubstTemplateTypeParmTypes; 109 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 110 SubstTemplateTypeParmPackTypes; 111 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 112 TemplateSpecializationTypes; 113 mutable llvm::FoldingSet<ParenType> ParenTypes; 114 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 115 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 116 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 117 ASTContext&> 118 DependentTemplateSpecializationTypes; 119 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 120 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 121 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 122 mutable llvm::FoldingSet<AutoType> AutoTypes; 123 llvm::FoldingSet<AttributedType> AttributedTypes; 124 125 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 126 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 127 mutable llvm::FoldingSet<SubstTemplateTemplateParmPackStorage> 128 SubstTemplateTemplateParmPacks; 129 130 /// \brief The set of nested name specifiers. 131 /// 132 /// This set is managed by the NestedNameSpecifier class. 133 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 134 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 135 friend class NestedNameSpecifier; 136 137 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 138 /// This is lazily created. This is intentionally not serialized. 139 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 140 ASTRecordLayouts; 141 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 142 ObjCLayouts; 143 144 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 145 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 146 147 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 148 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 149 150 /// \brief Mapping from __block VarDecls to their copy initialization expr. 151 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 152 153 /// \brief Representation of a "canonical" template template parameter that 154 /// is used in canonical template names. 155 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 156 TemplateTemplateParmDecl *Parm; 157 158 public: 159 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 160 : Parm(Parm) { } 161 162 TemplateTemplateParmDecl *getParam() const { return Parm; } 163 164 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 165 166 static void Profile(llvm::FoldingSetNodeID &ID, 167 TemplateTemplateParmDecl *Parm); 168 }; 169 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 170 CanonTemplateTemplateParms; 171 172 TemplateTemplateParmDecl * 173 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 174 175 /// \brief Whether __[u]int128_t identifier is installed. 176 bool IsInt128Installed; 177 178 /// BuiltinVaListType - built-in va list type. 179 /// This is initially null and set by Sema::LazilyCreateBuiltin when 180 /// a builtin that takes a valist is encountered. 181 QualType BuiltinVaListType; 182 183 /// ObjCIdType - a pseudo built-in typedef type (set by Sema). 184 QualType ObjCIdTypedefType; 185 186 /// ObjCSelType - another pseudo built-in typedef type (set by Sema). 187 QualType ObjCSelTypedefType; 188 189 /// ObjCProtoType - another pseudo built-in typedef type (set by Sema). 190 QualType ObjCProtoType; 191 const RecordType *ProtoStructType; 192 193 /// ObjCClassType - another pseudo built-in typedef type (set by Sema). 194 QualType ObjCClassTypedefType; 195 196 QualType ObjCConstantStringType; 197 mutable RecordDecl *CFConstantStringTypeDecl; 198 199 mutable RecordDecl *NSConstantStringTypeDecl; 200 201 mutable RecordDecl *ObjCFastEnumerationStateTypeDecl; 202 203 /// \brief The type for the C FILE type. 204 TypeDecl *FILEDecl; 205 206 /// \brief The type for the C jmp_buf type. 207 TypeDecl *jmp_bufDecl; 208 209 /// \brief The type for the C sigjmp_buf type. 210 TypeDecl *sigjmp_bufDecl; 211 212 /// \brief Type for the Block descriptor for Blocks CodeGen. 213 mutable RecordDecl *BlockDescriptorType; 214 215 /// \brief Type for the Block descriptor for Blocks CodeGen. 216 mutable RecordDecl *BlockDescriptorExtendedType; 217 218 /// \brief Declaration for the CUDA cudaConfigureCall function. 219 FunctionDecl *cudaConfigureCallDecl; 220 221 TypeSourceInfo NullTypeSourceInfo; 222 223 /// \brief Keeps track of all declaration attributes. 224 /// 225 /// Since so few decls have attrs, we keep them in a hash map instead of 226 /// wasting space in the Decl class. 227 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 228 229 /// \brief Keeps track of the static data member templates from which 230 /// static data members of class template specializations were instantiated. 231 /// 232 /// This data structure stores the mapping from instantiations of static 233 /// data members to the static data member representations within the 234 /// class template from which they were instantiated along with the kind 235 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 236 /// 237 /// Given the following example: 238 /// 239 /// \code 240 /// template<typename T> 241 /// struct X { 242 /// static T value; 243 /// }; 244 /// 245 /// template<typename T> 246 /// T X<T>::value = T(17); 247 /// 248 /// int *x = &X<int>::value; 249 /// \endcode 250 /// 251 /// This mapping will contain an entry that maps from the VarDecl for 252 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 253 /// class template X) and will be marked TSK_ImplicitInstantiation. 254 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 255 InstantiatedFromStaticDataMember; 256 257 /// \brief Keeps track of the declaration from which a UsingDecl was 258 /// created during instantiation. The source declaration is always 259 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 260 /// UnresolvedUsingTypenameDecl. 261 /// 262 /// For example: 263 /// \code 264 /// template<typename T> 265 /// struct A { 266 /// void f(); 267 /// }; 268 /// 269 /// template<typename T> 270 /// struct B : A<T> { 271 /// using A<T>::f; 272 /// }; 273 /// 274 /// template struct B<int>; 275 /// \endcode 276 /// 277 /// This mapping will contain an entry that maps from the UsingDecl in 278 /// B<int> to the UnresolvedUsingDecl in B<T>. 279 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 280 281 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 282 InstantiatedFromUsingShadowDecl; 283 284 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 285 286 /// \brief Mapping that stores the methods overridden by a given C++ 287 /// member function. 288 /// 289 /// Since most C++ member functions aren't virtual and therefore 290 /// don't override anything, we store the overridden functions in 291 /// this map on the side rather than within the CXXMethodDecl structure. 292 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 293 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 294 295 TranslationUnitDecl *TUDecl; 296 297 /// SourceMgr - The associated SourceManager object. 298 SourceManager &SourceMgr; 299 300 /// LangOpts - The language options used to create the AST associated with 301 /// this ASTContext object. 302 LangOptions LangOpts; 303 304 /// \brief The allocator used to create AST objects. 305 /// 306 /// AST objects are never destructed; rather, all memory associated with the 307 /// AST objects will be released when the ASTContext itself is destroyed. 308 mutable llvm::BumpPtrAllocator BumpAlloc; 309 310 /// \brief Allocator for partial diagnostics. 311 PartialDiagnostic::StorageAllocator DiagAllocator; 312 313 /// \brief The current C++ ABI. 314 llvm::OwningPtr<CXXABI> ABI; 315 CXXABI *createCXXABI(const TargetInfo &T); 316 317 /// \brief The logical -> physical address space map. 318 const LangAS::Map &AddrSpaceMap; 319 320 friend class ASTDeclReader; 321 322public: 323 const TargetInfo &Target; 324 IdentifierTable &Idents; 325 SelectorTable &Selectors; 326 Builtin::Context &BuiltinInfo; 327 mutable DeclarationNameTable DeclarationNames; 328 llvm::OwningPtr<ExternalASTSource> ExternalSource; 329 ASTMutationListener *Listener; 330 clang::PrintingPolicy PrintingPolicy; 331 332 // Typedefs which may be provided defining the structure of Objective-C 333 // pseudo-builtins 334 QualType ObjCIdRedefinitionType; 335 QualType ObjCClassRedefinitionType; 336 QualType ObjCSelRedefinitionType; 337 338 SourceManager& getSourceManager() { return SourceMgr; } 339 const SourceManager& getSourceManager() const { return SourceMgr; } 340 void *Allocate(unsigned Size, unsigned Align = 8) const { 341 return BumpAlloc.Allocate(Size, Align); 342 } 343 void Deallocate(void *Ptr) const { } 344 345 /// Return the total amount of physical memory allocated for representing 346 /// AST nodes and type information. 347 size_t getASTAllocatedMemory() const { 348 return BumpAlloc.getTotalMemory(); 349 } 350 /// Return the total memory used for various side tables. 351 size_t getSideTableAllocatedMemory() const; 352 353 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 354 return DiagAllocator; 355 } 356 357 const LangOptions& getLangOptions() const { return LangOpts; } 358 359 Diagnostic &getDiagnostics() const; 360 361 FullSourceLoc getFullLoc(SourceLocation Loc) const { 362 return FullSourceLoc(Loc,SourceMgr); 363 } 364 365 /// \brief Retrieve the attributes for the given declaration. 366 AttrVec& getDeclAttrs(const Decl *D); 367 368 /// \brief Erase the attributes corresponding to the given declaration. 369 void eraseDeclAttrs(const Decl *D); 370 371 /// \brief If this variable is an instantiated static data member of a 372 /// class template specialization, returns the templated static data member 373 /// from which it was instantiated. 374 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 375 const VarDecl *Var); 376 377 /// \brief Note that the static data member \p Inst is an instantiation of 378 /// the static data member template \p Tmpl of a class template. 379 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 380 TemplateSpecializationKind TSK, 381 SourceLocation PointOfInstantiation = SourceLocation()); 382 383 /// \brief If the given using decl is an instantiation of a 384 /// (possibly unresolved) using decl from a template instantiation, 385 /// return it. 386 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 387 388 /// \brief Remember that the using decl \p Inst is an instantiation 389 /// of the using decl \p Pattern of a class template. 390 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 391 392 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 393 UsingShadowDecl *Pattern); 394 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 395 396 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 397 398 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 399 400 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 401 /// bitfield which follows the non-bitfield 'LastFD'. 402 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 403 const FieldDecl *LastFD) const; 404 405 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 406 /// bitfield which follows the bitfield 'LastFD'. 407 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 408 const FieldDecl *LastFD) const; 409 410 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 411 /// bitfield which follows the bitfield 'LastFD'. 412 bool BitfieldFollowsBitfield(const FieldDecl *FD, 413 const FieldDecl *LastFD) const; 414 415 /// NoneBitfieldFollowsBitfield - return 'true" if 'FD' is not a 416 /// bitfield which follows the bitfield 'LastFD'. 417 bool NoneBitfieldFollowsBitfield(const FieldDecl *FD, 418 const FieldDecl *LastFD) const; 419 420 /// BitfieldFollowsNoneBitfield - return 'true" if 'FD' is a 421 /// bitfield which follows the none bitfield 'LastFD'. 422 bool BitfieldFollowsNoneBitfield(const FieldDecl *FD, 423 const FieldDecl *LastFD) const; 424 425 // Access to the set of methods overridden by the given C++ method. 426 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 427 overridden_cxx_method_iterator 428 overridden_methods_begin(const CXXMethodDecl *Method) const; 429 430 overridden_cxx_method_iterator 431 overridden_methods_end(const CXXMethodDecl *Method) const; 432 433 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 434 435 /// \brief Note that the given C++ \p Method overrides the given \p 436 /// Overridden method. 437 void addOverriddenMethod(const CXXMethodDecl *Method, 438 const CXXMethodDecl *Overridden); 439 440 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 441 442 443 // Builtin Types. 444 CanQualType VoidTy; 445 CanQualType BoolTy; 446 CanQualType CharTy; 447 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 448 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 449 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 450 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 451 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 452 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 453 CanQualType FloatTy, DoubleTy, LongDoubleTy; 454 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 455 CanQualType VoidPtrTy, NullPtrTy; 456 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 457 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 458 459 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 460 mutable QualType AutoDeductTy; // Deduction against 'auto'. 461 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 462 463 ASTContext(const LangOptions& LOpts, SourceManager &SM, const TargetInfo &t, 464 IdentifierTable &idents, SelectorTable &sels, 465 Builtin::Context &builtins, 466 unsigned size_reserve); 467 468 ~ASTContext(); 469 470 /// \brief Attach an external AST source to the AST context. 471 /// 472 /// The external AST source provides the ability to load parts of 473 /// the abstract syntax tree as needed from some external storage, 474 /// e.g., a precompiled header. 475 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 476 477 /// \brief Retrieve a pointer to the external AST source associated 478 /// with this AST context, if any. 479 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 480 481 /// \brief Attach an AST mutation listener to the AST context. 482 /// 483 /// The AST mutation listener provides the ability to track modifications to 484 /// the abstract syntax tree entities committed after they were initially 485 /// created. 486 void setASTMutationListener(ASTMutationListener *Listener) { 487 this->Listener = Listener; 488 } 489 490 /// \brief Retrieve a pointer to the AST mutation listener associated 491 /// with this AST context, if any. 492 ASTMutationListener *getASTMutationListener() const { return Listener; } 493 494 void PrintStats() const; 495 const std::vector<Type*>& getTypes() const { return Types; } 496 497 //===--------------------------------------------------------------------===// 498 // Type Constructors 499 //===--------------------------------------------------------------------===// 500 501private: 502 /// getExtQualType - Return a type with extended qualifiers. 503 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 504 505 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 506 507public: 508 /// getAddSpaceQualType - Return the uniqued reference to the type for an 509 /// address space qualified type with the specified type and address space. 510 /// The resulting type has a union of the qualifiers from T and the address 511 /// space. If T already has an address space specifier, it is silently 512 /// replaced. 513 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 514 515 /// getObjCGCQualType - Returns the uniqued reference to the type for an 516 /// objc gc qualified type. The retulting type has a union of the qualifiers 517 /// from T and the gc attribute. 518 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 519 520 /// getRestrictType - Returns the uniqued reference to the type for a 521 /// 'restrict' qualified type. The resulting type has a union of the 522 /// qualifiers from T and 'restrict'. 523 QualType getRestrictType(QualType T) const { 524 return T.withFastQualifiers(Qualifiers::Restrict); 525 } 526 527 /// getVolatileType - Returns the uniqued reference to the type for a 528 /// 'volatile' qualified type. The resulting type has a union of the 529 /// qualifiers from T and 'volatile'. 530 QualType getVolatileType(QualType T) const { 531 return T.withFastQualifiers(Qualifiers::Volatile); 532 } 533 534 /// getConstType - Returns the uniqued reference to the type for a 535 /// 'const' qualified type. The resulting type has a union of the 536 /// qualifiers from T and 'const'. 537 /// 538 /// It can be reasonably expected that this will always be 539 /// equivalent to calling T.withConst(). 540 QualType getConstType(QualType T) const { return T.withConst(); } 541 542 /// adjustFunctionType - Change the ExtInfo on a function type. 543 const FunctionType *adjustFunctionType(const FunctionType *Fn, 544 FunctionType::ExtInfo EInfo); 545 546 /// getComplexType - Return the uniqued reference to the type for a complex 547 /// number with the specified element type. 548 QualType getComplexType(QualType T) const; 549 CanQualType getComplexType(CanQualType T) const { 550 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 551 } 552 553 /// getPointerType - Return the uniqued reference to the type for a pointer to 554 /// the specified type. 555 QualType getPointerType(QualType T) const; 556 CanQualType getPointerType(CanQualType T) const { 557 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 558 } 559 560 /// getBlockPointerType - Return the uniqued reference to the type for a block 561 /// of the specified type. 562 QualType getBlockPointerType(QualType T) const; 563 564 /// This gets the struct used to keep track of the descriptor for pointer to 565 /// blocks. 566 QualType getBlockDescriptorType() const; 567 568 // Set the type for a Block descriptor type. 569 void setBlockDescriptorType(QualType T); 570 /// Get the BlockDescriptorType type, or NULL if it hasn't yet been built. 571 QualType getRawBlockdescriptorType() { 572 if (BlockDescriptorType) 573 return getTagDeclType(BlockDescriptorType); 574 return QualType(); 575 } 576 577 /// This gets the struct used to keep track of the extended descriptor for 578 /// pointer to blocks. 579 QualType getBlockDescriptorExtendedType() const; 580 581 // Set the type for a Block descriptor extended type. 582 void setBlockDescriptorExtendedType(QualType T); 583 /// Get the BlockDescriptorExtendedType type, or NULL if it hasn't yet been 584 /// built. 585 QualType getRawBlockdescriptorExtendedType() const { 586 if (BlockDescriptorExtendedType) 587 return getTagDeclType(BlockDescriptorExtendedType); 588 return QualType(); 589 } 590 591 void setcudaConfigureCallDecl(FunctionDecl *FD) { 592 cudaConfigureCallDecl = FD; 593 } 594 FunctionDecl *getcudaConfigureCallDecl() { 595 return cudaConfigureCallDecl; 596 } 597 598 /// This builds the struct used for __block variables. 599 QualType BuildByRefType(llvm::StringRef DeclName, QualType Ty) const; 600 601 /// Returns true iff we need copy/dispose helpers for the given type. 602 bool BlockRequiresCopying(QualType Ty) const; 603 604 /// getLValueReferenceType - Return the uniqued reference to the type for an 605 /// lvalue reference to the specified type. 606 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 607 const; 608 609 /// getRValueReferenceType - Return the uniqued reference to the type for an 610 /// rvalue reference to the specified type. 611 QualType getRValueReferenceType(QualType T) const; 612 613 /// getMemberPointerType - Return the uniqued reference to the type for a 614 /// member pointer to the specified type in the specified class. The class 615 /// is a Type because it could be a dependent name. 616 QualType getMemberPointerType(QualType T, const Type *Cls) const; 617 618 /// getVariableArrayType - Returns a non-unique reference to the type for a 619 /// variable array of the specified element type. 620 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 621 ArrayType::ArraySizeModifier ASM, 622 unsigned IndexTypeQuals, 623 SourceRange Brackets) const; 624 625 /// getDependentSizedArrayType - Returns a non-unique reference to 626 /// the type for a dependently-sized array of the specified element 627 /// type. FIXME: We will need these to be uniqued, or at least 628 /// comparable, at some point. 629 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 630 ArrayType::ArraySizeModifier ASM, 631 unsigned IndexTypeQuals, 632 SourceRange Brackets) const; 633 634 /// getIncompleteArrayType - Returns a unique reference to the type for a 635 /// incomplete array of the specified element type. 636 QualType getIncompleteArrayType(QualType EltTy, 637 ArrayType::ArraySizeModifier ASM, 638 unsigned IndexTypeQuals) const; 639 640 /// getConstantArrayType - Return the unique reference to the type for a 641 /// constant array of the specified element type. 642 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 643 ArrayType::ArraySizeModifier ASM, 644 unsigned IndexTypeQuals) const; 645 646 /// getVariableArrayDecayedType - Returns a vla type where known sizes 647 /// are replaced with [*]. 648 QualType getVariableArrayDecayedType(QualType Ty) const; 649 650 /// getVectorType - Return the unique reference to a vector type of 651 /// the specified element type and size. VectorType must be a built-in type. 652 QualType getVectorType(QualType VectorType, unsigned NumElts, 653 VectorType::VectorKind VecKind) const; 654 655 /// getExtVectorType - Return the unique reference to an extended vector type 656 /// of the specified element type and size. VectorType must be a built-in 657 /// type. 658 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 659 660 /// getDependentSizedExtVectorType - Returns a non-unique reference to 661 /// the type for a dependently-sized vector of the specified element 662 /// type. FIXME: We will need these to be uniqued, or at least 663 /// comparable, at some point. 664 QualType getDependentSizedExtVectorType(QualType VectorType, 665 Expr *SizeExpr, 666 SourceLocation AttrLoc) const; 667 668 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 669 /// 670 QualType getFunctionNoProtoType(QualType ResultTy, 671 const FunctionType::ExtInfo &Info) const; 672 673 QualType getFunctionNoProtoType(QualType ResultTy) const { 674 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 675 } 676 677 /// getFunctionType - Return a normal function type with a typed 678 /// argument list. 679 QualType getFunctionType(QualType ResultTy, 680 const QualType *Args, unsigned NumArgs, 681 const FunctionProtoType::ExtProtoInfo &EPI) const; 682 683 /// getTypeDeclType - Return the unique reference to the type for 684 /// the specified type declaration. 685 QualType getTypeDeclType(const TypeDecl *Decl, 686 const TypeDecl *PrevDecl = 0) const { 687 assert(Decl && "Passed null for Decl param"); 688 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 689 690 if (PrevDecl) { 691 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 692 Decl->TypeForDecl = PrevDecl->TypeForDecl; 693 return QualType(PrevDecl->TypeForDecl, 0); 694 } 695 696 return getTypeDeclTypeSlow(Decl); 697 } 698 699 /// getTypedefType - Return the unique reference to the type for the 700 /// specified typedef-name decl. 701 QualType getTypedefType(const TypedefNameDecl *Decl, 702 QualType Canon = QualType()) const; 703 704 QualType getRecordType(const RecordDecl *Decl) const; 705 706 QualType getEnumType(const EnumDecl *Decl) const; 707 708 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 709 710 QualType getAttributedType(AttributedType::Kind attrKind, 711 QualType modifiedType, 712 QualType equivalentType); 713 714 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 715 QualType Replacement) const; 716 QualType getSubstTemplateTypeParmPackType( 717 const TemplateTypeParmType *Replaced, 718 const TemplateArgument &ArgPack); 719 720 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 721 bool ParameterPack, 722 TemplateTypeParmDecl *ParmDecl = 0) const; 723 724 QualType getTemplateSpecializationType(TemplateName T, 725 const TemplateArgument *Args, 726 unsigned NumArgs, 727 QualType Canon = QualType()) const; 728 729 QualType getCanonicalTemplateSpecializationType(TemplateName T, 730 const TemplateArgument *Args, 731 unsigned NumArgs) const; 732 733 QualType getTemplateSpecializationType(TemplateName T, 734 const TemplateArgumentListInfo &Args, 735 QualType Canon = QualType()) const; 736 737 TypeSourceInfo * 738 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 739 const TemplateArgumentListInfo &Args, 740 QualType Canon = QualType()) const; 741 742 QualType getParenType(QualType NamedType) const; 743 744 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 745 NestedNameSpecifier *NNS, 746 QualType NamedType) const; 747 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 748 NestedNameSpecifier *NNS, 749 const IdentifierInfo *Name, 750 QualType Canon = QualType()) const; 751 752 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 753 NestedNameSpecifier *NNS, 754 const IdentifierInfo *Name, 755 const TemplateArgumentListInfo &Args) const; 756 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 757 NestedNameSpecifier *NNS, 758 const IdentifierInfo *Name, 759 unsigned NumArgs, 760 const TemplateArgument *Args) const; 761 762 QualType getPackExpansionType(QualType Pattern, 763 llvm::Optional<unsigned> NumExpansions); 764 765 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const; 766 767 QualType getObjCObjectType(QualType Base, 768 ObjCProtocolDecl * const *Protocols, 769 unsigned NumProtocols) const; 770 771 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 772 /// for the given ObjCObjectType. 773 QualType getObjCObjectPointerType(QualType OIT) const; 774 775 /// getTypeOfType - GCC extension. 776 QualType getTypeOfExprType(Expr *e) const; 777 QualType getTypeOfType(QualType t) const; 778 779 /// getDecltypeType - C++0x decltype. 780 QualType getDecltypeType(Expr *e) const; 781 782 /// getUnaryTransformType - unary type transforms 783 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 784 UnaryTransformType::UTTKind UKind) const; 785 786 /// getAutoType - C++0x deduced auto type. 787 QualType getAutoType(QualType DeducedType) const; 788 789 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 790 QualType getAutoDeductType() const; 791 792 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 793 QualType getAutoRRefDeductType() const; 794 795 /// getTagDeclType - Return the unique reference to the type for the 796 /// specified TagDecl (struct/union/class/enum) decl. 797 QualType getTagDeclType(const TagDecl *Decl) const; 798 799 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 800 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 801 CanQualType getSizeType() const; 802 803 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 804 /// returns a type compatible with the type defined in <stddef.h> as defined 805 /// by the target. 806 QualType getWCharType() const { return WCharTy; } 807 808 /// getSignedWCharType - Return the type of "signed wchar_t". 809 /// Used when in C++, as a GCC extension. 810 QualType getSignedWCharType() const; 811 812 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 813 /// Used when in C++, as a GCC extension. 814 QualType getUnsignedWCharType() const; 815 816 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 817 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 818 QualType getPointerDiffType() const; 819 820 // getCFConstantStringType - Return the C structure type used to represent 821 // constant CFStrings. 822 QualType getCFConstantStringType() const; 823 824 // getNSConstantStringType - Return the C structure type used to represent 825 // constant NSStrings. 826 QualType getNSConstantStringType() const; 827 /// Get the structure type used to representation NSStrings, or NULL 828 /// if it hasn't yet been built. 829 QualType getRawNSConstantStringType() const { 830 if (NSConstantStringTypeDecl) 831 return getTagDeclType(NSConstantStringTypeDecl); 832 return QualType(); 833 } 834 void setNSConstantStringType(QualType T); 835 836 837 /// Get the structure type used to representation CFStrings, or NULL 838 /// if it hasn't yet been built. 839 QualType getRawCFConstantStringType() const { 840 if (CFConstantStringTypeDecl) 841 return getTagDeclType(CFConstantStringTypeDecl); 842 return QualType(); 843 } 844 void setCFConstantStringType(QualType T); 845 846 // This setter/getter represents the ObjC type for an NSConstantString. 847 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 848 QualType getObjCConstantStringInterface() const { 849 return ObjCConstantStringType; 850 } 851 852 //// This gets the struct used to keep track of fast enumerations. 853 QualType getObjCFastEnumerationStateType() const; 854 855 /// Get the ObjCFastEnumerationState type, or NULL if it hasn't yet 856 /// been built. 857 QualType getRawObjCFastEnumerationStateType() const { 858 if (ObjCFastEnumerationStateTypeDecl) 859 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 860 return QualType(); 861 } 862 863 void setObjCFastEnumerationStateType(QualType T); 864 865 /// \brief Set the type for the C FILE type. 866 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 867 868 /// \brief Retrieve the C FILE type. 869 QualType getFILEType() const { 870 if (FILEDecl) 871 return getTypeDeclType(FILEDecl); 872 return QualType(); 873 } 874 875 /// \brief Set the type for the C jmp_buf type. 876 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 877 this->jmp_bufDecl = jmp_bufDecl; 878 } 879 880 /// \brief Retrieve the C jmp_buf type. 881 QualType getjmp_bufType() const { 882 if (jmp_bufDecl) 883 return getTypeDeclType(jmp_bufDecl); 884 return QualType(); 885 } 886 887 /// \brief Set the type for the C sigjmp_buf type. 888 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 889 this->sigjmp_bufDecl = sigjmp_bufDecl; 890 } 891 892 /// \brief Retrieve the C sigjmp_buf type. 893 QualType getsigjmp_bufType() const { 894 if (sigjmp_bufDecl) 895 return getTypeDeclType(sigjmp_bufDecl); 896 return QualType(); 897 } 898 899 /// \brief The result type of logical operations, '<', '>', '!=', etc. 900 QualType getLogicalOperationType() const { 901 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 902 } 903 904 /// getObjCEncodingForType - Emit the ObjC type encoding for the 905 /// given type into \arg S. If \arg NameFields is specified then 906 /// record field names are also encoded. 907 void getObjCEncodingForType(QualType t, std::string &S, 908 const FieldDecl *Field=0) const; 909 910 void getLegacyIntegralTypeEncoding(QualType &t) const; 911 912 // Put the string version of type qualifiers into S. 913 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 914 std::string &S) const; 915 916 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 917 //function. This is in the same format as Objective-C method encodings. 918 void getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 919 920 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 921 /// declaration. 922 void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S) 923 const; 924 925 /// getObjCEncodingForBlock - Return the encoded type for this block 926 /// declaration. 927 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 928 929 /// getObjCEncodingForPropertyDecl - Return the encoded type for 930 /// this method declaration. If non-NULL, Container must be either 931 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 932 /// only be NULL when getting encodings for protocol properties. 933 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 934 const Decl *Container, 935 std::string &S) const; 936 937 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 938 ObjCProtocolDecl *rProto) const; 939 940 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 941 /// purpose in characters. 942 CharUnits getObjCEncodingTypeSize(QualType t) const; 943 944 /// \brief Whether __[u]int128_t identifier is installed. 945 bool isInt128Installed() const { return IsInt128Installed; } 946 void setInt128Installed() { IsInt128Installed = true; } 947 948 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 949 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 950 QualType getObjCIdType() const { return ObjCIdTypedefType; } 951 void setObjCIdType(QualType T); 952 953 void setObjCSelType(QualType T); 954 QualType getObjCSelType() const { return ObjCSelTypedefType; } 955 956 void setObjCProtoType(QualType QT); 957 QualType getObjCProtoType() const { return ObjCProtoType; } 958 959 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 960 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 961 /// struct. 962 QualType getObjCClassType() const { return ObjCClassTypedefType; } 963 void setObjCClassType(QualType T); 964 965 void setBuiltinVaListType(QualType T); 966 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 967 968 /// getCVRQualifiedType - Returns a type with additional const, 969 /// volatile, or restrict qualifiers. 970 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 971 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 972 } 973 974 /// getQualifiedType - Returns a type with additional qualifiers. 975 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 976 if (!Qs.hasNonFastQualifiers()) 977 return T.withFastQualifiers(Qs.getFastQualifiers()); 978 QualifierCollector Qc(Qs); 979 const Type *Ptr = Qc.strip(T); 980 return getExtQualType(Ptr, Qc); 981 } 982 983 /// getQualifiedType - Returns a type with additional qualifiers. 984 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 985 if (!Qs.hasNonFastQualifiers()) 986 return QualType(T, Qs.getFastQualifiers()); 987 return getExtQualType(T, Qs); 988 } 989 990 DeclarationNameInfo getNameForTemplate(TemplateName Name, 991 SourceLocation NameLoc) const; 992 993 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 994 UnresolvedSetIterator End) const; 995 996 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 997 bool TemplateKeyword, 998 TemplateDecl *Template) const; 999 1000 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1001 const IdentifierInfo *Name) const; 1002 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1003 OverloadedOperatorKind Operator) const; 1004 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1005 const TemplateArgument &ArgPack) const; 1006 1007 enum GetBuiltinTypeError { 1008 GE_None, //< No error 1009 GE_Missing_stdio, //< Missing a type from <stdio.h> 1010 GE_Missing_setjmp //< Missing a type from <setjmp.h> 1011 }; 1012 1013 /// GetBuiltinType - Return the type for the specified builtin. If 1014 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1015 /// arguments to the builtin that are required to be integer constant 1016 /// expressions. 1017 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1018 unsigned *IntegerConstantArgs = 0) const; 1019 1020private: 1021 CanQualType getFromTargetType(unsigned Type) const; 1022 1023 //===--------------------------------------------------------------------===// 1024 // Type Predicates. 1025 //===--------------------------------------------------------------------===// 1026 1027public: 1028 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1029 /// garbage collection attribute. 1030 /// 1031 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1032 1033 /// areCompatibleVectorTypes - Return true if the given vector types 1034 /// are of the same unqualified type or if they are equivalent to the same 1035 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1036 /// Neon) types. 1037 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1038 1039 /// isObjCNSObjectType - Return true if this is an NSObject object with 1040 /// its NSObject attribute set. 1041 bool isObjCNSObjectType(QualType Ty) const; 1042 1043 //===--------------------------------------------------------------------===// 1044 // Type Sizing and Analysis 1045 //===--------------------------------------------------------------------===// 1046 1047 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1048 /// scalar floating point type. 1049 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1050 1051 /// getTypeInfo - Get the size and alignment of the specified complete type in 1052 /// bits. 1053 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1054 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1055 return getTypeInfo(T.getTypePtr()); 1056 } 1057 1058 /// getTypeSize - Return the size of the specified type, in bits. This method 1059 /// does not work on incomplete types. 1060 uint64_t getTypeSize(QualType T) const { 1061 return getTypeInfo(T).first; 1062 } 1063 uint64_t getTypeSize(const Type *T) const { 1064 return getTypeInfo(T).first; 1065 } 1066 1067 /// getCharWidth - Return the size of the character type, in bits 1068 uint64_t getCharWidth() const { 1069 return getTypeSize(CharTy); 1070 } 1071 1072 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1073 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1074 1075 /// toBits - Convert a size in characters to a size in bits. 1076 int64_t toBits(CharUnits CharSize) const; 1077 1078 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1079 /// This method does not work on incomplete types. 1080 CharUnits getTypeSizeInChars(QualType T) const; 1081 CharUnits getTypeSizeInChars(const Type *T) const; 1082 1083 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1084 /// This method does not work on incomplete types. 1085 unsigned getTypeAlign(QualType T) const { 1086 return getTypeInfo(T).second; 1087 } 1088 unsigned getTypeAlign(const Type *T) const { 1089 return getTypeInfo(T).second; 1090 } 1091 1092 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1093 /// characters. This method does not work on incomplete types. 1094 CharUnits getTypeAlignInChars(QualType T) const; 1095 CharUnits getTypeAlignInChars(const Type *T) const; 1096 1097 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1098 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1099 1100 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1101 /// type for the current target in bits. This can be different than the ABI 1102 /// alignment in cases where it is beneficial for performance to overalign 1103 /// a data type. 1104 unsigned getPreferredTypeAlign(const Type *T) const; 1105 1106 /// getDeclAlign - Return a conservative estimate of the alignment of 1107 /// the specified decl. Note that bitfields do not have a valid alignment, so 1108 /// this method will assert on them. 1109 /// If @p RefAsPointee, references are treated like their underlying type 1110 /// (for alignof), else they're treated like pointers (for CodeGen). 1111 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1112 1113 /// getASTRecordLayout - Get or compute information about the layout of the 1114 /// specified record (struct/union/class), which indicates its size and field 1115 /// position information. 1116 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1117 1118 /// getASTObjCInterfaceLayout - Get or compute information about the 1119 /// layout of the specified Objective-C interface. 1120 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1121 const; 1122 1123 void DumpRecordLayout(const RecordDecl *RD, llvm::raw_ostream &OS) const; 1124 1125 /// getASTObjCImplementationLayout - Get or compute information about 1126 /// the layout of the specified Objective-C implementation. This may 1127 /// differ from the interface if synthesized ivars are present. 1128 const ASTRecordLayout & 1129 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1130 1131 /// getKeyFunction - Get the key function for the given record decl, or NULL 1132 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1133 /// section 5.2.3: 1134 /// 1135 /// ...the first non-pure virtual function that is not inline at the point 1136 /// of class definition. 1137 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1138 1139 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1140 1141 MangleContext *createMangleContext(); 1142 1143 void ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1144 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) 1145 const; 1146 1147 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1148 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const; 1149 1150 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1151 void CollectInheritedProtocols(const Decl *CDecl, 1152 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1153 1154 //===--------------------------------------------------------------------===// 1155 // Type Operators 1156 //===--------------------------------------------------------------------===// 1157 1158 /// getCanonicalType - Return the canonical (structural) type corresponding to 1159 /// the specified potentially non-canonical type. The non-canonical version 1160 /// of a type may have many "decorated" versions of types. Decorators can 1161 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1162 /// to be free of any of these, allowing two canonical types to be compared 1163 /// for exact equality with a simple pointer comparison. 1164 CanQualType getCanonicalType(QualType T) const { 1165 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1166 } 1167 1168 const Type *getCanonicalType(const Type *T) const { 1169 return T->getCanonicalTypeInternal().getTypePtr(); 1170 } 1171 1172 /// getCanonicalParamType - Return the canonical parameter type 1173 /// corresponding to the specific potentially non-canonical one. 1174 /// Qualifiers are stripped off, functions are turned into function 1175 /// pointers, and arrays decay one level into pointers. 1176 CanQualType getCanonicalParamType(QualType T) const; 1177 1178 /// \brief Determine whether the given types are equivalent. 1179 bool hasSameType(QualType T1, QualType T2) { 1180 return getCanonicalType(T1) == getCanonicalType(T2); 1181 } 1182 1183 /// \brief Returns this type as a completely-unqualified array type, 1184 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1185 /// sugaring from the types, similar to the behavior of 1186 /// QualType::getUnqualifiedType(). 1187 /// 1188 /// \param T is the qualified type, which may be an ArrayType 1189 /// 1190 /// \param Quals will receive the full set of qualifiers that were 1191 /// applied to the array. 1192 /// 1193 /// \returns if this is an array type, the completely unqualified array type 1194 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1195 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1196 1197 /// \brief Determine whether the given types are equivalent after 1198 /// cvr-qualifiers have been removed. 1199 bool hasSameUnqualifiedType(QualType T1, QualType T2) { 1200 return getCanonicalType(T1).getTypePtr() == 1201 getCanonicalType(T2).getTypePtr(); 1202 } 1203 1204 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1205 1206 /// \brief Retrieves the "canonical" nested name specifier for a 1207 /// given nested name specifier. 1208 /// 1209 /// The canonical nested name specifier is a nested name specifier 1210 /// that uniquely identifies a type or namespace within the type 1211 /// system. For example, given: 1212 /// 1213 /// \code 1214 /// namespace N { 1215 /// struct S { 1216 /// template<typename T> struct X { typename T* type; }; 1217 /// }; 1218 /// } 1219 /// 1220 /// template<typename T> struct Y { 1221 /// typename N::S::X<T>::type member; 1222 /// }; 1223 /// \endcode 1224 /// 1225 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1226 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1227 /// by declarations in the type system and the canonical type for 1228 /// the template type parameter 'T' is template-param-0-0. 1229 NestedNameSpecifier * 1230 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1231 1232 /// \brief Retrieves the default calling convention to use for 1233 /// C++ instance methods. 1234 CallingConv getDefaultMethodCallConv(); 1235 1236 /// \brief Retrieves the canonical representation of the given 1237 /// calling convention. 1238 CallingConv getCanonicalCallConv(CallingConv CC) const { 1239 if (CC == CC_C) 1240 return CC_Default; 1241 return CC; 1242 } 1243 1244 /// \brief Determines whether two calling conventions name the same 1245 /// calling convention. 1246 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1247 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1248 } 1249 1250 /// \brief Retrieves the "canonical" template name that refers to a 1251 /// given template. 1252 /// 1253 /// The canonical template name is the simplest expression that can 1254 /// be used to refer to a given template. For most templates, this 1255 /// expression is just the template declaration itself. For example, 1256 /// the template std::vector can be referred to via a variety of 1257 /// names---std::vector, ::std::vector, vector (if vector is in 1258 /// scope), etc.---but all of these names map down to the same 1259 /// TemplateDecl, which is used to form the canonical template name. 1260 /// 1261 /// Dependent template names are more interesting. Here, the 1262 /// template name could be something like T::template apply or 1263 /// std::allocator<T>::template rebind, where the nested name 1264 /// specifier itself is dependent. In this case, the canonical 1265 /// template name uses the shortest form of the dependent 1266 /// nested-name-specifier, which itself contains all canonical 1267 /// types, values, and templates. 1268 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1269 1270 /// \brief Determine whether the given template names refer to the same 1271 /// template. 1272 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1273 1274 /// \brief Retrieve the "canonical" template argument. 1275 /// 1276 /// The canonical template argument is the simplest template argument 1277 /// (which may be a type, value, expression, or declaration) that 1278 /// expresses the value of the argument. 1279 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1280 const; 1281 1282 /// Type Query functions. If the type is an instance of the specified class, 1283 /// return the Type pointer for the underlying maximally pretty type. This 1284 /// is a member of ASTContext because this may need to do some amount of 1285 /// canonicalization, e.g. to move type qualifiers into the element type. 1286 const ArrayType *getAsArrayType(QualType T) const; 1287 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1288 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1289 } 1290 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1291 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1292 } 1293 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1294 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1295 } 1296 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1297 const { 1298 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1299 } 1300 1301 /// getBaseElementType - Returns the innermost element type of an array type. 1302 /// For example, will return "int" for int[m][n] 1303 QualType getBaseElementType(const ArrayType *VAT) const; 1304 1305 /// getBaseElementType - Returns the innermost element type of a type 1306 /// (which needn't actually be an array type). 1307 QualType getBaseElementType(QualType QT) const; 1308 1309 /// getConstantArrayElementCount - Returns number of constant array elements. 1310 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1311 1312 /// getArrayDecayedType - Return the properly qualified result of decaying the 1313 /// specified array type to a pointer. This operation is non-trivial when 1314 /// handling typedefs etc. The canonical type of "T" must be an array type, 1315 /// this returns a pointer to a properly qualified element of the array. 1316 /// 1317 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1318 QualType getArrayDecayedType(QualType T) const; 1319 1320 /// getPromotedIntegerType - Returns the type that Promotable will 1321 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1322 /// integer type. 1323 QualType getPromotedIntegerType(QualType PromotableType) const; 1324 1325 /// \brief Whether this is a promotable bitfield reference according 1326 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1327 /// 1328 /// \returns the type this bit-field will promote to, or NULL if no 1329 /// promotion occurs. 1330 QualType isPromotableBitField(Expr *E) const; 1331 1332 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1333 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1334 /// LHS < RHS, return -1. 1335 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1336 1337 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1338 /// point types, ignoring the domain of the type (i.e. 'double' == 1339 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1340 /// LHS < RHS, return -1. 1341 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1342 1343 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1344 /// point or a complex type (based on typeDomain/typeSize). 1345 /// 'typeDomain' is a real floating point or complex type. 1346 /// 'typeSize' is a real floating point or complex type. 1347 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1348 QualType typeDomain) const; 1349 1350 unsigned getTargetAddressSpace(QualType T) const { 1351 return getTargetAddressSpace(T.getQualifiers()); 1352 } 1353 1354 unsigned getTargetAddressSpace(Qualifiers Q) const { 1355 return getTargetAddressSpace(Q.getAddressSpace()); 1356 } 1357 1358 unsigned getTargetAddressSpace(unsigned AS) const { 1359 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1360 return AS; 1361 else 1362 return AddrSpaceMap[AS - LangAS::Offset]; 1363 } 1364 1365private: 1366 // Helper for integer ordering 1367 unsigned getIntegerRank(const Type *T) const; 1368 1369public: 1370 1371 //===--------------------------------------------------------------------===// 1372 // Type Compatibility Predicates 1373 //===--------------------------------------------------------------------===// 1374 1375 /// Compatibility predicates used to check assignment expressions. 1376 bool typesAreCompatible(QualType T1, QualType T2, 1377 bool CompareUnqualified = false); // C99 6.2.7p1 1378 1379 bool typesAreBlockPointerCompatible(QualType, QualType); 1380 1381 bool isObjCIdType(QualType T) const { 1382 return T == ObjCIdTypedefType; 1383 } 1384 bool isObjCClassType(QualType T) const { 1385 return T == ObjCClassTypedefType; 1386 } 1387 bool isObjCSelType(QualType T) const { 1388 return T == ObjCSelTypedefType; 1389 } 1390 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1391 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1392 bool ForCompare); 1393 1394 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1395 1396 // Check the safety of assignment from LHS to RHS 1397 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1398 const ObjCObjectPointerType *RHSOPT); 1399 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1400 const ObjCObjectType *RHS); 1401 bool canAssignObjCInterfacesInBlockPointer( 1402 const ObjCObjectPointerType *LHSOPT, 1403 const ObjCObjectPointerType *RHSOPT, 1404 bool BlockReturnType); 1405 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1406 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1407 const ObjCObjectPointerType *RHSOPT); 1408 bool canBindObjCObjectType(QualType To, QualType From); 1409 1410 // Functions for calculating composite types 1411 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1412 bool Unqualified = false, bool BlockReturnType = false); 1413 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1414 bool Unqualified = false); 1415 QualType mergeFunctionArgumentTypes(QualType, QualType, 1416 bool OfBlockPointer=false, 1417 bool Unqualified = false); 1418 QualType mergeTransparentUnionType(QualType, QualType, 1419 bool OfBlockPointer=false, 1420 bool Unqualified = false); 1421 1422 QualType mergeObjCGCQualifiers(QualType, QualType); 1423 1424 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1425 ObjCLayouts[CD] = 0; 1426 } 1427 1428 //===--------------------------------------------------------------------===// 1429 // Integer Predicates 1430 //===--------------------------------------------------------------------===// 1431 1432 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1433 // of bits in an integer type excluding any padding bits. 1434 unsigned getIntWidth(QualType T) const; 1435 1436 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1437 // unsigned integer type. This method takes a signed type, and returns the 1438 // corresponding unsigned integer type. 1439 QualType getCorrespondingUnsignedType(QualType T); 1440 1441 //===--------------------------------------------------------------------===// 1442 // Type Iterators. 1443 //===--------------------------------------------------------------------===// 1444 1445 typedef std::vector<Type*>::iterator type_iterator; 1446 typedef std::vector<Type*>::const_iterator const_type_iterator; 1447 1448 type_iterator types_begin() { return Types.begin(); } 1449 type_iterator types_end() { return Types.end(); } 1450 const_type_iterator types_begin() const { return Types.begin(); } 1451 const_type_iterator types_end() const { return Types.end(); } 1452 1453 //===--------------------------------------------------------------------===// 1454 // Integer Values 1455 //===--------------------------------------------------------------------===// 1456 1457 /// MakeIntValue - Make an APSInt of the appropriate width and 1458 /// signedness for the given \arg Value and integer \arg Type. 1459 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1460 llvm::APSInt Res(getIntWidth(Type), 1461 !Type->isSignedIntegerOrEnumerationType()); 1462 Res = Value; 1463 return Res; 1464 } 1465 1466 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1467 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1468 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1469 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1470 1471 /// \brief returns true if there is at lease one @implementation in TU. 1472 bool AnyObjCImplementation() { 1473 return !ObjCImpls.empty(); 1474 } 1475 1476 /// \brief Set the implementation of ObjCInterfaceDecl. 1477 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1478 ObjCImplementationDecl *ImplD); 1479 /// \brief Set the implementation of ObjCCategoryDecl. 1480 void setObjCImplementation(ObjCCategoryDecl *CatD, 1481 ObjCCategoryImplDecl *ImplD); 1482 1483 /// \brief Set the copy inialization expression of a block var decl. 1484 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1485 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1486 /// none exists. 1487 Expr *getBlockVarCopyInits(const VarDecl*VD); 1488 1489 /// \brief Allocate an uninitialized TypeSourceInfo. 1490 /// 1491 /// The caller should initialize the memory held by TypeSourceInfo using 1492 /// the TypeLoc wrappers. 1493 /// 1494 /// \param T the type that will be the basis for type source info. This type 1495 /// should refer to how the declarator was written in source code, not to 1496 /// what type semantic analysis resolved the declarator to. 1497 /// 1498 /// \param Size the size of the type info to create, or 0 if the size 1499 /// should be calculated based on the type. 1500 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1501 1502 /// \brief Allocate a TypeSourceInfo where all locations have been 1503 /// initialized to a given location, which defaults to the empty 1504 /// location. 1505 TypeSourceInfo * 1506 getTrivialTypeSourceInfo(QualType T, 1507 SourceLocation Loc = SourceLocation()) const; 1508 1509 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1510 1511 /// \brief Add a deallocation callback that will be invoked when the 1512 /// ASTContext is destroyed. 1513 /// 1514 /// \brief Callback A callback function that will be invoked on destruction. 1515 /// 1516 /// \brief Data Pointer data that will be provided to the callback function 1517 /// when it is called. 1518 void AddDeallocation(void (*Callback)(void*), void *Data); 1519 1520 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1521 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1522 1523 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1524 /// lazily, only when used; this is only relevant for function or file scoped 1525 /// var definitions. 1526 /// 1527 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1528 /// it is not used. 1529 bool DeclMustBeEmitted(const Decl *D); 1530 1531 //===--------------------------------------------------------------------===// 1532 // Statistics 1533 //===--------------------------------------------------------------------===// 1534 1535 /// \brief The number of implicitly-declared default constructors. 1536 static unsigned NumImplicitDefaultConstructors; 1537 1538 /// \brief The number of implicitly-declared default constructors for 1539 /// which declarations were built. 1540 static unsigned NumImplicitDefaultConstructorsDeclared; 1541 1542 /// \brief The number of implicitly-declared copy constructors. 1543 static unsigned NumImplicitCopyConstructors; 1544 1545 /// \brief The number of implicitly-declared copy constructors for 1546 /// which declarations were built. 1547 static unsigned NumImplicitCopyConstructorsDeclared; 1548 1549 /// \brief The number of implicitly-declared copy assignment operators. 1550 static unsigned NumImplicitCopyAssignmentOperators; 1551 1552 /// \brief The number of implicitly-declared copy assignment operators for 1553 /// which declarations were built. 1554 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1555 1556 /// \brief The number of implicitly-declared destructors. 1557 static unsigned NumImplicitDestructors; 1558 1559 /// \brief The number of implicitly-declared destructors for which 1560 /// declarations were built. 1561 static unsigned NumImplicitDestructorsDeclared; 1562 1563private: 1564 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1565 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1566 1567 void InitBuiltinTypes(); 1568 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1569 1570 // Return the ObjC type encoding for a given type. 1571 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1572 bool ExpandPointedToStructures, 1573 bool ExpandStructures, 1574 const FieldDecl *Field, 1575 bool OutermostType = false, 1576 bool EncodingProperty = false, 1577 bool StructField = false) const; 1578 1579 // Adds the encoding of the structure's members. 1580 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1581 const FieldDecl *Field, 1582 bool includeVBases = true) const; 1583 1584 const ASTRecordLayout & 1585 getObjCLayout(const ObjCInterfaceDecl *D, 1586 const ObjCImplementationDecl *Impl) const; 1587 1588private: 1589 /// \brief A set of deallocations that should be performed when the 1590 /// ASTContext is destroyed. 1591 llvm::SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1592 1593 // FIXME: This currently contains the set of StoredDeclMaps used 1594 // by DeclContext objects. This probably should not be in ASTContext, 1595 // but we include it here so that ASTContext can quickly deallocate them. 1596 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1597 1598 /// \brief A counter used to uniquely identify "blocks". 1599 mutable unsigned int UniqueBlockByRefTypeID; 1600 1601 friend class DeclContext; 1602 friend class DeclarationNameTable; 1603 void ReleaseDeclContextMaps(); 1604}; 1605 1606/// @brief Utility function for constructing a nullary selector. 1607static inline Selector GetNullarySelector(llvm::StringRef name, ASTContext& Ctx) { 1608 IdentifierInfo* II = &Ctx.Idents.get(name); 1609 return Ctx.Selectors.getSelector(0, &II); 1610} 1611 1612/// @brief Utility function for constructing an unary selector. 1613static inline Selector GetUnarySelector(llvm::StringRef name, ASTContext& Ctx) { 1614 IdentifierInfo* II = &Ctx.Idents.get(name); 1615 return Ctx.Selectors.getSelector(1, &II); 1616} 1617 1618} // end namespace clang 1619 1620// operator new and delete aren't allowed inside namespaces. 1621// The throw specifications are mandated by the standard. 1622/// @brief Placement new for using the ASTContext's allocator. 1623/// 1624/// This placement form of operator new uses the ASTContext's allocator for 1625/// obtaining memory. It is a non-throwing new, which means that it returns 1626/// null on error. (If that is what the allocator does. The current does, so if 1627/// this ever changes, this operator will have to be changed, too.) 1628/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1629/// @code 1630/// // Default alignment (8) 1631/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1632/// // Specific alignment 1633/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1634/// @endcode 1635/// Please note that you cannot use delete on the pointer; it must be 1636/// deallocated using an explicit destructor call followed by 1637/// @c Context.Deallocate(Ptr). 1638/// 1639/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1640/// @param C The ASTContext that provides the allocator. 1641/// @param Alignment The alignment of the allocated memory (if the underlying 1642/// allocator supports it). 1643/// @return The allocated memory. Could be NULL. 1644inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1645 size_t Alignment) throw () { 1646 return C.Allocate(Bytes, Alignment); 1647} 1648/// @brief Placement delete companion to the new above. 1649/// 1650/// This operator is just a companion to the new above. There is no way of 1651/// invoking it directly; see the new operator for more details. This operator 1652/// is called implicitly by the compiler if a placement new expression using 1653/// the ASTContext throws in the object constructor. 1654inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1655 throw () { 1656 C.Deallocate(Ptr); 1657} 1658 1659/// This placement form of operator new[] uses the ASTContext's allocator for 1660/// obtaining memory. It is a non-throwing new[], which means that it returns 1661/// null on error. 1662/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1663/// @code 1664/// // Default alignment (8) 1665/// char *data = new (Context) char[10]; 1666/// // Specific alignment 1667/// char *data = new (Context, 4) char[10]; 1668/// @endcode 1669/// Please note that you cannot use delete on the pointer; it must be 1670/// deallocated using an explicit destructor call followed by 1671/// @c Context.Deallocate(Ptr). 1672/// 1673/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1674/// @param C The ASTContext that provides the allocator. 1675/// @param Alignment The alignment of the allocated memory (if the underlying 1676/// allocator supports it). 1677/// @return The allocated memory. Could be NULL. 1678inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1679 size_t Alignment = 8) throw () { 1680 return C.Allocate(Bytes, Alignment); 1681} 1682 1683/// @brief Placement delete[] companion to the new[] above. 1684/// 1685/// This operator is just a companion to the new[] above. There is no way of 1686/// invoking it directly; see the new[] operator for more details. This operator 1687/// is called implicitly by the compiler if a placement new[] expression using 1688/// the ASTContext throws in the object constructor. 1689inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1690 throw () { 1691 C.Deallocate(Ptr); 1692} 1693 1694#endif 1695