ASTContext.h revision f95d4125c01fa7b98722ae8cfbceac4a87d037b4
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/LambdaMangleContext.h" 25#include "clang/AST/NestedNameSpecifier.h" 26#include "clang/AST/PrettyPrinter.h" 27#include "clang/AST/TemplateName.h" 28#include "clang/AST/Type.h" 29#include "clang/AST/CanonicalType.h" 30#include "clang/AST/RawCommentList.h" 31#include "llvm/ADT/DenseMap.h" 32#include "llvm/ADT/FoldingSet.h" 33#include "llvm/ADT/IntrusiveRefCntPtr.h" 34#include "llvm/ADT/OwningPtr.h" 35#include "llvm/ADT/SmallPtrSet.h" 36#include "llvm/ADT/TinyPtrVector.h" 37#include "llvm/Support/Allocator.h" 38#include <vector> 39 40namespace llvm { 41 struct fltSemantics; 42} 43 44namespace clang { 45 class FileManager; 46 class ASTRecordLayout; 47 class BlockExpr; 48 class CharUnits; 49 class DiagnosticsEngine; 50 class Expr; 51 class ExternalASTSource; 52 class ASTMutationListener; 53 class IdentifierTable; 54 class SelectorTable; 55 class TargetInfo; 56 class CXXABI; 57 // Decls 58 class DeclContext; 59 class CXXConversionDecl; 60 class CXXMethodDecl; 61 class CXXRecordDecl; 62 class Decl; 63 class FieldDecl; 64 class MangleContext; 65 class ObjCIvarDecl; 66 class ObjCIvarRefExpr; 67 class ObjCPropertyDecl; 68 class ParmVarDecl; 69 class RecordDecl; 70 class StoredDeclsMap; 71 class TagDecl; 72 class TemplateTemplateParmDecl; 73 class TemplateTypeParmDecl; 74 class TranslationUnitDecl; 75 class TypeDecl; 76 class TypedefNameDecl; 77 class UsingDecl; 78 class UsingShadowDecl; 79 class UnresolvedSetIterator; 80 81 namespace Builtin { class Context; } 82 83/// ASTContext - This class holds long-lived AST nodes (such as types and 84/// decls) that can be referred to throughout the semantic analysis of a file. 85class ASTContext : public RefCountedBase<ASTContext> { 86 ASTContext &this_() { return *this; } 87 88 mutable std::vector<Type*> Types; 89 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 90 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 91 mutable llvm::FoldingSet<PointerType> PointerTypes; 92 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 93 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 94 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 95 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 96 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 97 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 98 mutable std::vector<VariableArrayType*> VariableArrayTypes; 99 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 100 mutable llvm::FoldingSet<DependentSizedExtVectorType> 101 DependentSizedExtVectorTypes; 102 mutable llvm::FoldingSet<VectorType> VectorTypes; 103 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 104 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 105 FunctionProtoTypes; 106 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 107 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 108 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 109 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 110 SubstTemplateTypeParmTypes; 111 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 112 SubstTemplateTypeParmPackTypes; 113 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 114 TemplateSpecializationTypes; 115 mutable llvm::FoldingSet<ParenType> ParenTypes; 116 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 117 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 118 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 119 ASTContext&> 120 DependentTemplateSpecializationTypes; 121 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 122 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 123 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 124 mutable llvm::FoldingSet<AutoType> AutoTypes; 125 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 126 llvm::FoldingSet<AttributedType> AttributedTypes; 127 128 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 129 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 130 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 131 SubstTemplateTemplateParms; 132 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 133 ASTContext&> 134 SubstTemplateTemplateParmPacks; 135 136 /// \brief The set of nested name specifiers. 137 /// 138 /// This set is managed by the NestedNameSpecifier class. 139 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 140 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 141 friend class NestedNameSpecifier; 142 143 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 144 /// This is lazily created. This is intentionally not serialized. 145 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 146 ASTRecordLayouts; 147 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 148 ObjCLayouts; 149 150 /// TypeInfoMap - A cache from types to size and alignment information. 151 typedef llvm::DenseMap<const Type*, 152 std::pair<uint64_t, unsigned> > TypeInfoMap; 153 mutable TypeInfoMap MemoizedTypeInfo; 154 155 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 156 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 157 158 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 159 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 160 161 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 162 /// interface. 163 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 164 165 /// \brief Mapping from __block VarDecls to their copy initialization expr. 166 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 167 168 /// \brief Mapping from class scope functions specialization to their 169 /// template patterns. 170 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 171 ClassScopeSpecializationPattern; 172 173 /// \brief Representation of a "canonical" template template parameter that 174 /// is used in canonical template names. 175 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 176 TemplateTemplateParmDecl *Parm; 177 178 public: 179 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 180 : Parm(Parm) { } 181 182 TemplateTemplateParmDecl *getParam() const { return Parm; } 183 184 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 185 186 static void Profile(llvm::FoldingSetNodeID &ID, 187 TemplateTemplateParmDecl *Parm); 188 }; 189 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 190 CanonTemplateTemplateParms; 191 192 TemplateTemplateParmDecl * 193 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 194 195 /// \brief The typedef for the __int128_t type. 196 mutable TypedefDecl *Int128Decl; 197 198 /// \brief The typedef for the __uint128_t type. 199 mutable TypedefDecl *UInt128Decl; 200 201 /// \brief The typedef for the target specific predefined 202 /// __builtin_va_list type. 203 mutable TypedefDecl *BuiltinVaListDecl; 204 205 /// \brief The typedef for the predefined 'id' type. 206 mutable TypedefDecl *ObjCIdDecl; 207 208 /// \brief The typedef for the predefined 'SEL' type. 209 mutable TypedefDecl *ObjCSelDecl; 210 211 /// \brief The typedef for the predefined 'Class' type. 212 mutable TypedefDecl *ObjCClassDecl; 213 214 /// \brief The typedef for the predefined 'Protocol' class in Objective-C. 215 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 216 217 // Typedefs which may be provided defining the structure of Objective-C 218 // pseudo-builtins 219 QualType ObjCIdRedefinitionType; 220 QualType ObjCClassRedefinitionType; 221 QualType ObjCSelRedefinitionType; 222 223 QualType ObjCConstantStringType; 224 mutable RecordDecl *CFConstantStringTypeDecl; 225 226 QualType ObjCNSStringType; 227 228 /// \brief The typedef declaration for the Objective-C "instancetype" type. 229 TypedefDecl *ObjCInstanceTypeDecl; 230 231 /// \brief The type for the C FILE type. 232 TypeDecl *FILEDecl; 233 234 /// \brief The type for the C jmp_buf type. 235 TypeDecl *jmp_bufDecl; 236 237 /// \brief The type for the C sigjmp_buf type. 238 TypeDecl *sigjmp_bufDecl; 239 240 /// \brief The type for the C ucontext_t type. 241 TypeDecl *ucontext_tDecl; 242 243 /// \brief Type for the Block descriptor for Blocks CodeGen. 244 /// 245 /// Since this is only used for generation of debug info, it is not 246 /// serialized. 247 mutable RecordDecl *BlockDescriptorType; 248 249 /// \brief Type for the Block descriptor for Blocks CodeGen. 250 /// 251 /// Since this is only used for generation of debug info, it is not 252 /// serialized. 253 mutable RecordDecl *BlockDescriptorExtendedType; 254 255 /// \brief Declaration for the CUDA cudaConfigureCall function. 256 FunctionDecl *cudaConfigureCallDecl; 257 258 TypeSourceInfo NullTypeSourceInfo; 259 260 /// \brief Keeps track of all declaration attributes. 261 /// 262 /// Since so few decls have attrs, we keep them in a hash map instead of 263 /// wasting space in the Decl class. 264 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 265 266 /// \brief Keeps track of the static data member templates from which 267 /// static data members of class template specializations were instantiated. 268 /// 269 /// This data structure stores the mapping from instantiations of static 270 /// data members to the static data member representations within the 271 /// class template from which they were instantiated along with the kind 272 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 273 /// 274 /// Given the following example: 275 /// 276 /// \code 277 /// template<typename T> 278 /// struct X { 279 /// static T value; 280 /// }; 281 /// 282 /// template<typename T> 283 /// T X<T>::value = T(17); 284 /// 285 /// int *x = &X<int>::value; 286 /// \endcode 287 /// 288 /// This mapping will contain an entry that maps from the VarDecl for 289 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 290 /// class template X) and will be marked TSK_ImplicitInstantiation. 291 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 292 InstantiatedFromStaticDataMember; 293 294 /// \brief Keeps track of the declaration from which a UsingDecl was 295 /// created during instantiation. The source declaration is always 296 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 297 /// UnresolvedUsingTypenameDecl. 298 /// 299 /// For example: 300 /// \code 301 /// template<typename T> 302 /// struct A { 303 /// void f(); 304 /// }; 305 /// 306 /// template<typename T> 307 /// struct B : A<T> { 308 /// using A<T>::f; 309 /// }; 310 /// 311 /// template struct B<int>; 312 /// \endcode 313 /// 314 /// This mapping will contain an entry that maps from the UsingDecl in 315 /// B<int> to the UnresolvedUsingDecl in B<T>. 316 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 317 318 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 319 InstantiatedFromUsingShadowDecl; 320 321 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 322 323 /// \brief Mapping that stores the methods overridden by a given C++ 324 /// member function. 325 /// 326 /// Since most C++ member functions aren't virtual and therefore 327 /// don't override anything, we store the overridden functions in 328 /// this map on the side rather than within the CXXMethodDecl structure. 329 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 330 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 331 332 /// \brief Mapping from each declaration context to its corresponding lambda 333 /// mangling context. 334 llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts; 335 336 /// \brief Mapping that stores parameterIndex values for ParmVarDecls 337 /// when that value exceeds the bitfield size of 338 /// ParmVarDeclBits.ParameterIndex. 339 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 340 ParameterIndexTable ParamIndices; 341 342 ImportDecl *FirstLocalImport; 343 ImportDecl *LastLocalImport; 344 345 TranslationUnitDecl *TUDecl; 346 347 /// SourceMgr - The associated SourceManager object. 348 SourceManager &SourceMgr; 349 350 /// LangOpts - The language options used to create the AST associated with 351 /// this ASTContext object. 352 LangOptions &LangOpts; 353 354 /// \brief The allocator used to create AST objects. 355 /// 356 /// AST objects are never destructed; rather, all memory associated with the 357 /// AST objects will be released when the ASTContext itself is destroyed. 358 mutable llvm::BumpPtrAllocator BumpAlloc; 359 360 /// \brief Allocator for partial diagnostics. 361 PartialDiagnostic::StorageAllocator DiagAllocator; 362 363 /// \brief The current C++ ABI. 364 OwningPtr<CXXABI> ABI; 365 CXXABI *createCXXABI(const TargetInfo &T); 366 367 /// \brief The logical -> physical address space map. 368 const LangAS::Map *AddrSpaceMap; 369 370 friend class ASTDeclReader; 371 friend class ASTReader; 372 friend class ASTWriter; 373 friend class CXXRecordDecl; 374 375 const TargetInfo *Target; 376 clang::PrintingPolicy PrintingPolicy; 377 378public: 379 IdentifierTable &Idents; 380 SelectorTable &Selectors; 381 Builtin::Context &BuiltinInfo; 382 mutable DeclarationNameTable DeclarationNames; 383 OwningPtr<ExternalASTSource> ExternalSource; 384 ASTMutationListener *Listener; 385 386 clang::PrintingPolicy getPrintingPolicy() const { return PrintingPolicy; } 387 388 void setPrintingPolicy(clang::PrintingPolicy Policy) { 389 PrintingPolicy = Policy; 390 } 391 392 SourceManager& getSourceManager() { return SourceMgr; } 393 const SourceManager& getSourceManager() const { return SourceMgr; } 394 void *Allocate(unsigned Size, unsigned Align = 8) const { 395 return BumpAlloc.Allocate(Size, Align); 396 } 397 void Deallocate(void *Ptr) const { } 398 399 /// Return the total amount of physical memory allocated for representing 400 /// AST nodes and type information. 401 size_t getASTAllocatedMemory() const { 402 return BumpAlloc.getTotalMemory(); 403 } 404 /// Return the total memory used for various side tables. 405 size_t getSideTableAllocatedMemory() const; 406 407 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 408 return DiagAllocator; 409 } 410 411 const TargetInfo &getTargetInfo() const { return *Target; } 412 413 const LangOptions& getLangOpts() const { return LangOpts; } 414 415 DiagnosticsEngine &getDiagnostics() const; 416 417 FullSourceLoc getFullLoc(SourceLocation Loc) const { 418 return FullSourceLoc(Loc,SourceMgr); 419 } 420 421 /// \brief All comments in this translation unit. 422 RawCommentList Comments; 423 424 /// \brief True if comments are already loaded from ExternalASTSource. 425 mutable bool CommentsLoaded; 426 427 /// \brief Mapping from declarations to their comments (stored within 428 /// Comments list), once we have already looked up the comment associated 429 /// with a given declaration. 430 mutable llvm::DenseMap<const Decl *, const RawComment *> DeclComments; 431 432 /// \brief Return the Doxygen-style comment attached to a given declaration, 433 /// without looking into cache. 434 const RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 435 436public: 437 void addComment(const RawComment &RC) { 438 Comments.addComment(RC, *this); 439 } 440 441 /// \brief Return the Doxygen-style comment attached to a given declaration. 442 /// Returns NULL if no comment is attached. 443 const RawComment *getRawCommentForDecl(const Decl *D) const; 444 445 /// \brief Retrieve the attributes for the given declaration. 446 AttrVec& getDeclAttrs(const Decl *D); 447 448 /// \brief Erase the attributes corresponding to the given declaration. 449 void eraseDeclAttrs(const Decl *D); 450 451 /// \brief If this variable is an instantiated static data member of a 452 /// class template specialization, returns the templated static data member 453 /// from which it was instantiated. 454 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 455 const VarDecl *Var); 456 457 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 458 459 void setClassScopeSpecializationPattern(FunctionDecl *FD, 460 FunctionDecl *Pattern); 461 462 /// \brief Note that the static data member \p Inst is an instantiation of 463 /// the static data member template \p Tmpl of a class template. 464 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 465 TemplateSpecializationKind TSK, 466 SourceLocation PointOfInstantiation = SourceLocation()); 467 468 /// \brief If the given using decl is an instantiation of a 469 /// (possibly unresolved) using decl from a template instantiation, 470 /// return it. 471 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 472 473 /// \brief Remember that the using decl \p Inst is an instantiation 474 /// of the using decl \p Pattern of a class template. 475 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 476 477 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 478 UsingShadowDecl *Pattern); 479 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 480 481 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 482 483 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 484 485 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 486 /// bitfield which follows the non-bitfield 'LastFD'. 487 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 488 const FieldDecl *LastFD) const; 489 490 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 491 /// bitfield which follows the bitfield 'LastFD'. 492 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 493 const FieldDecl *LastFD) const; 494 495 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 496 /// bitfield which follows the bitfield 'LastFD'. 497 bool BitfieldFollowsBitfield(const FieldDecl *FD, 498 const FieldDecl *LastFD) const; 499 500 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 501 /// bitfield which follows the bitfield 'LastFD'. 502 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 503 const FieldDecl *LastFD) const; 504 505 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 506 /// bitfield which follows the none bitfield 'LastFD'. 507 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 508 const FieldDecl *LastFD) const; 509 510 // Access to the set of methods overridden by the given C++ method. 511 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 512 overridden_cxx_method_iterator 513 overridden_methods_begin(const CXXMethodDecl *Method) const; 514 515 overridden_cxx_method_iterator 516 overridden_methods_end(const CXXMethodDecl *Method) const; 517 518 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 519 520 /// \brief Note that the given C++ \p Method overrides the given \p 521 /// Overridden method. 522 void addOverriddenMethod(const CXXMethodDecl *Method, 523 const CXXMethodDecl *Overridden); 524 525 /// \brief Notify the AST context that a new import declaration has been 526 /// parsed or implicitly created within this translation unit. 527 void addedLocalImportDecl(ImportDecl *Import); 528 529 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 530 return Import->NextLocalImport; 531 } 532 533 /// \brief Iterator that visits import declarations. 534 class import_iterator { 535 ImportDecl *Import; 536 537 public: 538 typedef ImportDecl *value_type; 539 typedef ImportDecl *reference; 540 typedef ImportDecl *pointer; 541 typedef int difference_type; 542 typedef std::forward_iterator_tag iterator_category; 543 544 import_iterator() : Import() { } 545 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 546 547 reference operator*() const { return Import; } 548 pointer operator->() const { return Import; } 549 550 import_iterator &operator++() { 551 Import = ASTContext::getNextLocalImport(Import); 552 return *this; 553 } 554 555 import_iterator operator++(int) { 556 import_iterator Other(*this); 557 ++(*this); 558 return Other; 559 } 560 561 friend bool operator==(import_iterator X, import_iterator Y) { 562 return X.Import == Y.Import; 563 } 564 565 friend bool operator!=(import_iterator X, import_iterator Y) { 566 return X.Import != Y.Import; 567 } 568 }; 569 570 import_iterator local_import_begin() const { 571 return import_iterator(FirstLocalImport); 572 } 573 import_iterator local_import_end() const { return import_iterator(); } 574 575 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 576 577 578 // Builtin Types. 579 CanQualType VoidTy; 580 CanQualType BoolTy; 581 CanQualType CharTy; 582 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 583 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 584 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 585 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 586 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 587 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 588 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 589 CanQualType FloatTy, DoubleTy, LongDoubleTy; 590 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 591 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 592 CanQualType VoidPtrTy, NullPtrTy; 593 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 594 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 595 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 596 CanQualType ObjCBuiltinBoolTy; 597 598 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 599 mutable QualType AutoDeductTy; // Deduction against 'auto'. 600 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 601 602 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 603 IdentifierTable &idents, SelectorTable &sels, 604 Builtin::Context &builtins, 605 unsigned size_reserve, 606 bool DelayInitialization = false); 607 608 ~ASTContext(); 609 610 /// \brief Attach an external AST source to the AST context. 611 /// 612 /// The external AST source provides the ability to load parts of 613 /// the abstract syntax tree as needed from some external storage, 614 /// e.g., a precompiled header. 615 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 616 617 /// \brief Retrieve a pointer to the external AST source associated 618 /// with this AST context, if any. 619 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 620 621 /// \brief Attach an AST mutation listener to the AST context. 622 /// 623 /// The AST mutation listener provides the ability to track modifications to 624 /// the abstract syntax tree entities committed after they were initially 625 /// created. 626 void setASTMutationListener(ASTMutationListener *Listener) { 627 this->Listener = Listener; 628 } 629 630 /// \brief Retrieve a pointer to the AST mutation listener associated 631 /// with this AST context, if any. 632 ASTMutationListener *getASTMutationListener() const { return Listener; } 633 634 void PrintStats() const; 635 const std::vector<Type*>& getTypes() const { return Types; } 636 637 /// \brief Retrieve the declaration for the 128-bit signed integer type. 638 TypedefDecl *getInt128Decl() const; 639 640 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 641 TypedefDecl *getUInt128Decl() const; 642 643 //===--------------------------------------------------------------------===// 644 // Type Constructors 645 //===--------------------------------------------------------------------===// 646 647private: 648 /// getExtQualType - Return a type with extended qualifiers. 649 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 650 651 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 652 653public: 654 /// getAddSpaceQualType - Return the uniqued reference to the type for an 655 /// address space qualified type with the specified type and address space. 656 /// The resulting type has a union of the qualifiers from T and the address 657 /// space. If T already has an address space specifier, it is silently 658 /// replaced. 659 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 660 661 /// getObjCGCQualType - Returns the uniqued reference to the type for an 662 /// objc gc qualified type. The retulting type has a union of the qualifiers 663 /// from T and the gc attribute. 664 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 665 666 /// getRestrictType - Returns the uniqued reference to the type for a 667 /// 'restrict' qualified type. The resulting type has a union of the 668 /// qualifiers from T and 'restrict'. 669 QualType getRestrictType(QualType T) const { 670 return T.withFastQualifiers(Qualifiers::Restrict); 671 } 672 673 /// getVolatileType - Returns the uniqued reference to the type for a 674 /// 'volatile' qualified type. The resulting type has a union of the 675 /// qualifiers from T and 'volatile'. 676 QualType getVolatileType(QualType T) const { 677 return T.withFastQualifiers(Qualifiers::Volatile); 678 } 679 680 /// getConstType - Returns the uniqued reference to the type for a 681 /// 'const' qualified type. The resulting type has a union of the 682 /// qualifiers from T and 'const'. 683 /// 684 /// It can be reasonably expected that this will always be 685 /// equivalent to calling T.withConst(). 686 QualType getConstType(QualType T) const { return T.withConst(); } 687 688 /// adjustFunctionType - Change the ExtInfo on a function type. 689 const FunctionType *adjustFunctionType(const FunctionType *Fn, 690 FunctionType::ExtInfo EInfo); 691 692 /// getComplexType - Return the uniqued reference to the type for a complex 693 /// number with the specified element type. 694 QualType getComplexType(QualType T) const; 695 CanQualType getComplexType(CanQualType T) const { 696 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 697 } 698 699 /// getPointerType - Return the uniqued reference to the type for a pointer to 700 /// the specified type. 701 QualType getPointerType(QualType T) const; 702 CanQualType getPointerType(CanQualType T) const { 703 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 704 } 705 706 /// getAtomicType - Return the uniqued reference to the atomic type for 707 /// the specified type. 708 QualType getAtomicType(QualType T) const; 709 710 /// getBlockPointerType - Return the uniqued reference to the type for a block 711 /// of the specified type. 712 QualType getBlockPointerType(QualType T) const; 713 714 /// This gets the struct used to keep track of the descriptor for pointer to 715 /// blocks. 716 QualType getBlockDescriptorType() const; 717 718 /// This gets the struct used to keep track of the extended descriptor for 719 /// pointer to blocks. 720 QualType getBlockDescriptorExtendedType() const; 721 722 void setcudaConfigureCallDecl(FunctionDecl *FD) { 723 cudaConfigureCallDecl = FD; 724 } 725 FunctionDecl *getcudaConfigureCallDecl() { 726 return cudaConfigureCallDecl; 727 } 728 729 /// This builds the struct used for __block variables. 730 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 731 732 /// Returns true iff we need copy/dispose helpers for the given type. 733 bool BlockRequiresCopying(QualType Ty) const; 734 735 /// getLValueReferenceType - Return the uniqued reference to the type for an 736 /// lvalue reference to the specified type. 737 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 738 const; 739 740 /// getRValueReferenceType - Return the uniqued reference to the type for an 741 /// rvalue reference to the specified type. 742 QualType getRValueReferenceType(QualType T) const; 743 744 /// getMemberPointerType - Return the uniqued reference to the type for a 745 /// member pointer to the specified type in the specified class. The class 746 /// is a Type because it could be a dependent name. 747 QualType getMemberPointerType(QualType T, const Type *Cls) const; 748 749 /// getVariableArrayType - Returns a non-unique reference to the type for a 750 /// variable array of the specified element type. 751 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 752 ArrayType::ArraySizeModifier ASM, 753 unsigned IndexTypeQuals, 754 SourceRange Brackets) const; 755 756 /// getDependentSizedArrayType - Returns a non-unique reference to 757 /// the type for a dependently-sized array of the specified element 758 /// type. FIXME: We will need these to be uniqued, or at least 759 /// comparable, at some point. 760 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 761 ArrayType::ArraySizeModifier ASM, 762 unsigned IndexTypeQuals, 763 SourceRange Brackets) const; 764 765 /// getIncompleteArrayType - Returns a unique reference to the type for a 766 /// incomplete array of the specified element type. 767 QualType getIncompleteArrayType(QualType EltTy, 768 ArrayType::ArraySizeModifier ASM, 769 unsigned IndexTypeQuals) const; 770 771 /// getConstantArrayType - Return the unique reference to the type for a 772 /// constant array of the specified element type. 773 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 774 ArrayType::ArraySizeModifier ASM, 775 unsigned IndexTypeQuals) const; 776 777 /// getVariableArrayDecayedType - Returns a vla type where known sizes 778 /// are replaced with [*]. 779 QualType getVariableArrayDecayedType(QualType Ty) const; 780 781 /// getVectorType - Return the unique reference to a vector type of 782 /// the specified element type and size. VectorType must be a built-in type. 783 QualType getVectorType(QualType VectorType, unsigned NumElts, 784 VectorType::VectorKind VecKind) const; 785 786 /// getExtVectorType - Return the unique reference to an extended vector type 787 /// of the specified element type and size. VectorType must be a built-in 788 /// type. 789 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 790 791 /// getDependentSizedExtVectorType - Returns a non-unique reference to 792 /// the type for a dependently-sized vector of the specified element 793 /// type. FIXME: We will need these to be uniqued, or at least 794 /// comparable, at some point. 795 QualType getDependentSizedExtVectorType(QualType VectorType, 796 Expr *SizeExpr, 797 SourceLocation AttrLoc) const; 798 799 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 800 /// 801 QualType getFunctionNoProtoType(QualType ResultTy, 802 const FunctionType::ExtInfo &Info) const; 803 804 QualType getFunctionNoProtoType(QualType ResultTy) const { 805 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 806 } 807 808 /// getFunctionType - Return a normal function type with a typed 809 /// argument list. 810 QualType getFunctionType(QualType ResultTy, 811 const QualType *Args, unsigned NumArgs, 812 const FunctionProtoType::ExtProtoInfo &EPI) const; 813 814 /// getTypeDeclType - Return the unique reference to the type for 815 /// the specified type declaration. 816 QualType getTypeDeclType(const TypeDecl *Decl, 817 const TypeDecl *PrevDecl = 0) const { 818 assert(Decl && "Passed null for Decl param"); 819 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 820 821 if (PrevDecl) { 822 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 823 Decl->TypeForDecl = PrevDecl->TypeForDecl; 824 return QualType(PrevDecl->TypeForDecl, 0); 825 } 826 827 return getTypeDeclTypeSlow(Decl); 828 } 829 830 /// getTypedefType - Return the unique reference to the type for the 831 /// specified typedef-name decl. 832 QualType getTypedefType(const TypedefNameDecl *Decl, 833 QualType Canon = QualType()) const; 834 835 QualType getRecordType(const RecordDecl *Decl) const; 836 837 QualType getEnumType(const EnumDecl *Decl) const; 838 839 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 840 841 QualType getAttributedType(AttributedType::Kind attrKind, 842 QualType modifiedType, 843 QualType equivalentType); 844 845 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 846 QualType Replacement) const; 847 QualType getSubstTemplateTypeParmPackType( 848 const TemplateTypeParmType *Replaced, 849 const TemplateArgument &ArgPack); 850 851 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 852 bool ParameterPack, 853 TemplateTypeParmDecl *ParmDecl = 0) const; 854 855 QualType getTemplateSpecializationType(TemplateName T, 856 const TemplateArgument *Args, 857 unsigned NumArgs, 858 QualType Canon = QualType()) const; 859 860 QualType getCanonicalTemplateSpecializationType(TemplateName T, 861 const TemplateArgument *Args, 862 unsigned NumArgs) const; 863 864 QualType getTemplateSpecializationType(TemplateName T, 865 const TemplateArgumentListInfo &Args, 866 QualType Canon = QualType()) const; 867 868 TypeSourceInfo * 869 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 870 const TemplateArgumentListInfo &Args, 871 QualType Canon = QualType()) const; 872 873 QualType getParenType(QualType NamedType) const; 874 875 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 876 NestedNameSpecifier *NNS, 877 QualType NamedType) const; 878 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 879 NestedNameSpecifier *NNS, 880 const IdentifierInfo *Name, 881 QualType Canon = QualType()) const; 882 883 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 884 NestedNameSpecifier *NNS, 885 const IdentifierInfo *Name, 886 const TemplateArgumentListInfo &Args) const; 887 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 888 NestedNameSpecifier *NNS, 889 const IdentifierInfo *Name, 890 unsigned NumArgs, 891 const TemplateArgument *Args) const; 892 893 QualType getPackExpansionType(QualType Pattern, 894 llvm::Optional<unsigned> NumExpansions); 895 896 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 897 ObjCInterfaceDecl *PrevDecl = 0) const; 898 899 QualType getObjCObjectType(QualType Base, 900 ObjCProtocolDecl * const *Protocols, 901 unsigned NumProtocols) const; 902 903 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 904 /// for the given ObjCObjectType. 905 QualType getObjCObjectPointerType(QualType OIT) const; 906 907 /// getTypeOfType - GCC extension. 908 QualType getTypeOfExprType(Expr *e) const; 909 QualType getTypeOfType(QualType t) const; 910 911 /// getDecltypeType - C++0x decltype. 912 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 913 914 /// getUnaryTransformType - unary type transforms 915 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 916 UnaryTransformType::UTTKind UKind) const; 917 918 /// getAutoType - C++0x deduced auto type. 919 QualType getAutoType(QualType DeducedType) const; 920 921 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 922 QualType getAutoDeductType() const; 923 924 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 925 QualType getAutoRRefDeductType() const; 926 927 /// getTagDeclType - Return the unique reference to the type for the 928 /// specified TagDecl (struct/union/class/enum) decl. 929 QualType getTagDeclType(const TagDecl *Decl) const; 930 931 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 932 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 933 CanQualType getSizeType() const; 934 935 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5), 936 /// defined in <stdint.h>. 937 CanQualType getIntMaxType() const; 938 939 /// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5), 940 /// defined in <stdint.h>. 941 CanQualType getUIntMaxType() const; 942 943 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 944 /// returns a type compatible with the type defined in <stddef.h> as defined 945 /// by the target. 946 QualType getWCharType() const { return WCharTy; } 947 948 /// getSignedWCharType - Return the type of "signed wchar_t". 949 /// Used when in C++, as a GCC extension. 950 QualType getSignedWCharType() const; 951 952 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 953 /// Used when in C++, as a GCC extension. 954 QualType getUnsignedWCharType() const; 955 956 /// getWIntType - In C99, this returns a type compatible with the type 957 /// defined in <stddef.h> as defined by the target. 958 QualType getWIntType() const { return WIntTy; } 959 960 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 961 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 962 QualType getPointerDiffType() const; 963 964 // getCFConstantStringType - Return the C structure type used to represent 965 // constant CFStrings. 966 QualType getCFConstantStringType() const; 967 968 /// Get the structure type used to representation CFStrings, or NULL 969 /// if it hasn't yet been built. 970 QualType getRawCFConstantStringType() const { 971 if (CFConstantStringTypeDecl) 972 return getTagDeclType(CFConstantStringTypeDecl); 973 return QualType(); 974 } 975 void setCFConstantStringType(QualType T); 976 977 // This setter/getter represents the ObjC type for an NSConstantString. 978 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 979 QualType getObjCConstantStringInterface() const { 980 return ObjCConstantStringType; 981 } 982 983 QualType getObjCNSStringType() const { 984 return ObjCNSStringType; 985 } 986 987 void setObjCNSStringType(QualType T) { 988 ObjCNSStringType = T; 989 } 990 991 /// \brief Retrieve the type that 'id' has been defined to, which may be 992 /// different from the built-in 'id' if 'id' has been typedef'd. 993 QualType getObjCIdRedefinitionType() const { 994 if (ObjCIdRedefinitionType.isNull()) 995 return getObjCIdType(); 996 return ObjCIdRedefinitionType; 997 } 998 999 /// \brief Set the user-written type that redefines 'id'. 1000 void setObjCIdRedefinitionType(QualType RedefType) { 1001 ObjCIdRedefinitionType = RedefType; 1002 } 1003 1004 /// \brief Retrieve the type that 'Class' has been defined to, which may be 1005 /// different from the built-in 'Class' if 'Class' has been typedef'd. 1006 QualType getObjCClassRedefinitionType() const { 1007 if (ObjCClassRedefinitionType.isNull()) 1008 return getObjCClassType(); 1009 return ObjCClassRedefinitionType; 1010 } 1011 1012 /// \brief Set the user-written type that redefines 'SEL'. 1013 void setObjCClassRedefinitionType(QualType RedefType) { 1014 ObjCClassRedefinitionType = RedefType; 1015 } 1016 1017 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1018 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1019 QualType getObjCSelRedefinitionType() const { 1020 if (ObjCSelRedefinitionType.isNull()) 1021 return getObjCSelType(); 1022 return ObjCSelRedefinitionType; 1023 } 1024 1025 1026 /// \brief Set the user-written type that redefines 'SEL'. 1027 void setObjCSelRedefinitionType(QualType RedefType) { 1028 ObjCSelRedefinitionType = RedefType; 1029 } 1030 1031 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1032 /// otherwise, returns a NULL type; 1033 QualType getObjCInstanceType() { 1034 return getTypeDeclType(getObjCInstanceTypeDecl()); 1035 } 1036 1037 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1038 /// "instancetype" type. 1039 TypedefDecl *getObjCInstanceTypeDecl(); 1040 1041 /// \brief Set the type for the C FILE type. 1042 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1043 1044 /// \brief Retrieve the C FILE type. 1045 QualType getFILEType() const { 1046 if (FILEDecl) 1047 return getTypeDeclType(FILEDecl); 1048 return QualType(); 1049 } 1050 1051 /// \brief Set the type for the C jmp_buf type. 1052 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1053 this->jmp_bufDecl = jmp_bufDecl; 1054 } 1055 1056 /// \brief Retrieve the C jmp_buf type. 1057 QualType getjmp_bufType() const { 1058 if (jmp_bufDecl) 1059 return getTypeDeclType(jmp_bufDecl); 1060 return QualType(); 1061 } 1062 1063 /// \brief Set the type for the C sigjmp_buf type. 1064 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1065 this->sigjmp_bufDecl = sigjmp_bufDecl; 1066 } 1067 1068 /// \brief Retrieve the C sigjmp_buf type. 1069 QualType getsigjmp_bufType() const { 1070 if (sigjmp_bufDecl) 1071 return getTypeDeclType(sigjmp_bufDecl); 1072 return QualType(); 1073 } 1074 1075 /// \brief Set the type for the C ucontext_t type. 1076 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1077 this->ucontext_tDecl = ucontext_tDecl; 1078 } 1079 1080 /// \brief Retrieve the C ucontext_t type. 1081 QualType getucontext_tType() const { 1082 if (ucontext_tDecl) 1083 return getTypeDeclType(ucontext_tDecl); 1084 return QualType(); 1085 } 1086 1087 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1088 QualType getLogicalOperationType() const { 1089 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1090 } 1091 1092 /// getObjCEncodingForType - Emit the ObjC type encoding for the 1093 /// given type into \arg S. If \arg NameFields is specified then 1094 /// record field names are also encoded. 1095 void getObjCEncodingForType(QualType t, std::string &S, 1096 const FieldDecl *Field=0) const; 1097 1098 void getLegacyIntegralTypeEncoding(QualType &t) const; 1099 1100 // Put the string version of type qualifiers into S. 1101 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1102 std::string &S) const; 1103 1104 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 1105 /// function. This is in the same format as Objective-C method encodings. 1106 /// 1107 /// \returns true if an error occurred (e.g., because one of the parameter 1108 /// types is incomplete), false otherwise. 1109 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1110 1111 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 1112 /// declaration. 1113 /// 1114 /// \returns true if an error occurred (e.g., because one of the parameter 1115 /// types is incomplete), false otherwise. 1116 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1117 bool Extended = false) 1118 const; 1119 1120 /// getObjCEncodingForBlock - Return the encoded type for this block 1121 /// declaration. 1122 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1123 1124 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1125 /// this method declaration. If non-NULL, Container must be either 1126 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1127 /// only be NULL when getting encodings for protocol properties. 1128 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1129 const Decl *Container, 1130 std::string &S) const; 1131 1132 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1133 ObjCProtocolDecl *rProto) const; 1134 1135 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 1136 /// purpose in characters. 1137 CharUnits getObjCEncodingTypeSize(QualType t) const; 1138 1139 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 1140 /// in Objective-C. 1141 TypedefDecl *getObjCIdDecl() const; 1142 1143 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 1144 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 1145 QualType getObjCIdType() const { 1146 return getTypeDeclType(getObjCIdDecl()); 1147 } 1148 1149 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1150 /// in Objective-C. 1151 TypedefDecl *getObjCSelDecl() const; 1152 1153 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1154 /// 'SEL' type. 1155 QualType getObjCSelType() const { 1156 return getTypeDeclType(getObjCSelDecl()); 1157 } 1158 1159 /// \brief Retrieve the typedef declaration corresponding to the predefined 1160 /// Objective-C 'Class' type. 1161 TypedefDecl *getObjCClassDecl() const; 1162 1163 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1164 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1165 /// struct. 1166 QualType getObjCClassType() const { 1167 return getTypeDeclType(getObjCClassDecl()); 1168 } 1169 1170 /// \brief Retrieve the Objective-C class declaration corresponding to 1171 /// the predefined 'Protocol' class. 1172 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1173 1174 /// \brief Retrieve the type of the Objective-C "Protocol" class. 1175 QualType getObjCProtoType() const { 1176 return getObjCInterfaceType(getObjCProtocolDecl()); 1177 } 1178 1179 /// \brief Retrieve the C type declaration corresponding to the predefined 1180 /// __builtin_va_list type. 1181 TypedefDecl *getBuiltinVaListDecl() const; 1182 1183 /// \brief Retrieve the type of the __builtin_va_list type. 1184 QualType getBuiltinVaListType() const { 1185 return getTypeDeclType(getBuiltinVaListDecl()); 1186 } 1187 1188 /// getCVRQualifiedType - Returns a type with additional const, 1189 /// volatile, or restrict qualifiers. 1190 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1191 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1192 } 1193 1194 /// getQualifiedType - Un-split a SplitQualType. 1195 QualType getQualifiedType(SplitQualType split) const { 1196 return getQualifiedType(split.Ty, split.Quals); 1197 } 1198 1199 /// getQualifiedType - Returns a type with additional qualifiers. 1200 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1201 if (!Qs.hasNonFastQualifiers()) 1202 return T.withFastQualifiers(Qs.getFastQualifiers()); 1203 QualifierCollector Qc(Qs); 1204 const Type *Ptr = Qc.strip(T); 1205 return getExtQualType(Ptr, Qc); 1206 } 1207 1208 /// getQualifiedType - Returns a type with additional qualifiers. 1209 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1210 if (!Qs.hasNonFastQualifiers()) 1211 return QualType(T, Qs.getFastQualifiers()); 1212 return getExtQualType(T, Qs); 1213 } 1214 1215 /// getLifetimeQualifiedType - Returns a type with the given 1216 /// lifetime qualifier. 1217 QualType getLifetimeQualifiedType(QualType type, 1218 Qualifiers::ObjCLifetime lifetime) { 1219 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1220 assert(lifetime != Qualifiers::OCL_None); 1221 1222 Qualifiers qs; 1223 qs.addObjCLifetime(lifetime); 1224 return getQualifiedType(type, qs); 1225 } 1226 1227 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1228 SourceLocation NameLoc) const; 1229 1230 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1231 UnresolvedSetIterator End) const; 1232 1233 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1234 bool TemplateKeyword, 1235 TemplateDecl *Template) const; 1236 1237 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1238 const IdentifierInfo *Name) const; 1239 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1240 OverloadedOperatorKind Operator) const; 1241 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1242 TemplateName replacement) const; 1243 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1244 const TemplateArgument &ArgPack) const; 1245 1246 enum GetBuiltinTypeError { 1247 GE_None, ///< No error 1248 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1249 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1250 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1251 }; 1252 1253 /// GetBuiltinType - Return the type for the specified builtin. If 1254 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1255 /// arguments to the builtin that are required to be integer constant 1256 /// expressions. 1257 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1258 unsigned *IntegerConstantArgs = 0) const; 1259 1260private: 1261 CanQualType getFromTargetType(unsigned Type) const; 1262 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1263 1264 //===--------------------------------------------------------------------===// 1265 // Type Predicates. 1266 //===--------------------------------------------------------------------===// 1267 1268public: 1269 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1270 /// garbage collection attribute. 1271 /// 1272 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1273 1274 /// areCompatibleVectorTypes - Return true if the given vector types 1275 /// are of the same unqualified type or if they are equivalent to the same 1276 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1277 /// Neon) types. 1278 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1279 1280 /// isObjCNSObjectType - Return true if this is an NSObject object with 1281 /// its NSObject attribute set. 1282 static bool isObjCNSObjectType(QualType Ty) { 1283 return Ty->isObjCNSObjectType(); 1284 } 1285 1286 //===--------------------------------------------------------------------===// 1287 // Type Sizing and Analysis 1288 //===--------------------------------------------------------------------===// 1289 1290 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1291 /// scalar floating point type. 1292 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1293 1294 /// getTypeInfo - Get the size and alignment of the specified complete type in 1295 /// bits. 1296 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1297 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1298 return getTypeInfo(T.getTypePtr()); 1299 } 1300 1301 /// getTypeSize - Return the size of the specified type, in bits. This method 1302 /// does not work on incomplete types. 1303 uint64_t getTypeSize(QualType T) const { 1304 return getTypeInfo(T).first; 1305 } 1306 uint64_t getTypeSize(const Type *T) const { 1307 return getTypeInfo(T).first; 1308 } 1309 1310 /// getCharWidth - Return the size of the character type, in bits 1311 uint64_t getCharWidth() const { 1312 return getTypeSize(CharTy); 1313 } 1314 1315 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1316 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1317 1318 /// toBits - Convert a size in characters to a size in bits. 1319 int64_t toBits(CharUnits CharSize) const; 1320 1321 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1322 /// This method does not work on incomplete types. 1323 CharUnits getTypeSizeInChars(QualType T) const; 1324 CharUnits getTypeSizeInChars(const Type *T) const; 1325 1326 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1327 /// This method does not work on incomplete types. 1328 unsigned getTypeAlign(QualType T) const { 1329 return getTypeInfo(T).second; 1330 } 1331 unsigned getTypeAlign(const Type *T) const { 1332 return getTypeInfo(T).second; 1333 } 1334 1335 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1336 /// characters. This method does not work on incomplete types. 1337 CharUnits getTypeAlignInChars(QualType T) const; 1338 CharUnits getTypeAlignInChars(const Type *T) const; 1339 1340 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1341 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1342 1343 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1344 /// type for the current target in bits. This can be different than the ABI 1345 /// alignment in cases where it is beneficial for performance to overalign 1346 /// a data type. 1347 unsigned getPreferredTypeAlign(const Type *T) const; 1348 1349 /// getDeclAlign - Return a conservative estimate of the alignment of 1350 /// the specified decl. Note that bitfields do not have a valid alignment, so 1351 /// this method will assert on them. 1352 /// If @p RefAsPointee, references are treated like their underlying type 1353 /// (for alignof), else they're treated like pointers (for CodeGen). 1354 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1355 1356 /// getASTRecordLayout - Get or compute information about the layout of the 1357 /// specified record (struct/union/class), which indicates its size and field 1358 /// position information. 1359 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1360 1361 /// getASTObjCInterfaceLayout - Get or compute information about the 1362 /// layout of the specified Objective-C interface. 1363 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1364 const; 1365 1366 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1367 bool Simple = false) const; 1368 1369 /// getASTObjCImplementationLayout - Get or compute information about 1370 /// the layout of the specified Objective-C implementation. This may 1371 /// differ from the interface if synthesized ivars are present. 1372 const ASTRecordLayout & 1373 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1374 1375 /// getKeyFunction - Get the key function for the given record decl, or NULL 1376 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1377 /// section 5.2.3: 1378 /// 1379 /// ...the first non-pure virtual function that is not inline at the point 1380 /// of class definition. 1381 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1382 1383 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1384 uint64_t getFieldOffset(const ValueDecl *FD) const; 1385 1386 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1387 1388 MangleContext *createMangleContext(); 1389 1390 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1391 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1392 1393 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1394 void CollectInheritedProtocols(const Decl *CDecl, 1395 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1396 1397 //===--------------------------------------------------------------------===// 1398 // Type Operators 1399 //===--------------------------------------------------------------------===// 1400 1401 /// getCanonicalType - Return the canonical (structural) type corresponding to 1402 /// the specified potentially non-canonical type. The non-canonical version 1403 /// of a type may have many "decorated" versions of types. Decorators can 1404 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1405 /// to be free of any of these, allowing two canonical types to be compared 1406 /// for exact equality with a simple pointer comparison. 1407 CanQualType getCanonicalType(QualType T) const { 1408 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1409 } 1410 1411 const Type *getCanonicalType(const Type *T) const { 1412 return T->getCanonicalTypeInternal().getTypePtr(); 1413 } 1414 1415 /// getCanonicalParamType - Return the canonical parameter type 1416 /// corresponding to the specific potentially non-canonical one. 1417 /// Qualifiers are stripped off, functions are turned into function 1418 /// pointers, and arrays decay one level into pointers. 1419 CanQualType getCanonicalParamType(QualType T) const; 1420 1421 /// \brief Determine whether the given types are equivalent. 1422 bool hasSameType(QualType T1, QualType T2) const { 1423 return getCanonicalType(T1) == getCanonicalType(T2); 1424 } 1425 1426 /// \brief Returns this type as a completely-unqualified array type, 1427 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1428 /// sugaring from the types, similar to the behavior of 1429 /// QualType::getUnqualifiedType(). 1430 /// 1431 /// \param T is the qualified type, which may be an ArrayType 1432 /// 1433 /// \param Quals will receive the full set of qualifiers that were 1434 /// applied to the array. 1435 /// 1436 /// \returns if this is an array type, the completely unqualified array type 1437 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1438 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1439 1440 /// \brief Determine whether the given types are equivalent after 1441 /// cvr-qualifiers have been removed. 1442 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1443 return getCanonicalType(T1).getTypePtr() == 1444 getCanonicalType(T2).getTypePtr(); 1445 } 1446 1447 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1448 1449 /// \brief Retrieves the "canonical" nested name specifier for a 1450 /// given nested name specifier. 1451 /// 1452 /// The canonical nested name specifier is a nested name specifier 1453 /// that uniquely identifies a type or namespace within the type 1454 /// system. For example, given: 1455 /// 1456 /// \code 1457 /// namespace N { 1458 /// struct S { 1459 /// template<typename T> struct X { typename T* type; }; 1460 /// }; 1461 /// } 1462 /// 1463 /// template<typename T> struct Y { 1464 /// typename N::S::X<T>::type member; 1465 /// }; 1466 /// \endcode 1467 /// 1468 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1469 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1470 /// by declarations in the type system and the canonical type for 1471 /// the template type parameter 'T' is template-param-0-0. 1472 NestedNameSpecifier * 1473 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1474 1475 /// \brief Retrieves the default calling convention to use for 1476 /// C++ instance methods. 1477 CallingConv getDefaultMethodCallConv(); 1478 1479 /// \brief Retrieves the canonical representation of the given 1480 /// calling convention. 1481 CallingConv getCanonicalCallConv(CallingConv CC) const { 1482 if (!LangOpts.MRTD && CC == CC_C) 1483 return CC_Default; 1484 return CC; 1485 } 1486 1487 /// \brief Determines whether two calling conventions name the same 1488 /// calling convention. 1489 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1490 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1491 } 1492 1493 /// \brief Retrieves the "canonical" template name that refers to a 1494 /// given template. 1495 /// 1496 /// The canonical template name is the simplest expression that can 1497 /// be used to refer to a given template. For most templates, this 1498 /// expression is just the template declaration itself. For example, 1499 /// the template std::vector can be referred to via a variety of 1500 /// names---std::vector, \::std::vector, vector (if vector is in 1501 /// scope), etc.---but all of these names map down to the same 1502 /// TemplateDecl, which is used to form the canonical template name. 1503 /// 1504 /// Dependent template names are more interesting. Here, the 1505 /// template name could be something like T::template apply or 1506 /// std::allocator<T>::template rebind, where the nested name 1507 /// specifier itself is dependent. In this case, the canonical 1508 /// template name uses the shortest form of the dependent 1509 /// nested-name-specifier, which itself contains all canonical 1510 /// types, values, and templates. 1511 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1512 1513 /// \brief Determine whether the given template names refer to the same 1514 /// template. 1515 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1516 1517 /// \brief Retrieve the "canonical" template argument. 1518 /// 1519 /// The canonical template argument is the simplest template argument 1520 /// (which may be a type, value, expression, or declaration) that 1521 /// expresses the value of the argument. 1522 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1523 const; 1524 1525 /// Type Query functions. If the type is an instance of the specified class, 1526 /// return the Type pointer for the underlying maximally pretty type. This 1527 /// is a member of ASTContext because this may need to do some amount of 1528 /// canonicalization, e.g. to move type qualifiers into the element type. 1529 const ArrayType *getAsArrayType(QualType T) const; 1530 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1531 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1532 } 1533 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1534 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1535 } 1536 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1537 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1538 } 1539 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1540 const { 1541 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1542 } 1543 1544 /// getBaseElementType - Returns the innermost element type of an array type. 1545 /// For example, will return "int" for int[m][n] 1546 QualType getBaseElementType(const ArrayType *VAT) const; 1547 1548 /// getBaseElementType - Returns the innermost element type of a type 1549 /// (which needn't actually be an array type). 1550 QualType getBaseElementType(QualType QT) const; 1551 1552 /// getConstantArrayElementCount - Returns number of constant array elements. 1553 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1554 1555 /// \brief Perform adjustment on the parameter type of a function. 1556 /// 1557 /// This routine adjusts the given parameter type @p T to the actual 1558 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1559 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1560 QualType getAdjustedParameterType(QualType T) const; 1561 1562 /// \brief Retrieve the parameter type as adjusted for use in the signature 1563 /// of a function, decaying array and function types and removing top-level 1564 /// cv-qualifiers. 1565 QualType getSignatureParameterType(QualType T) const; 1566 1567 /// getArrayDecayedType - Return the properly qualified result of decaying the 1568 /// specified array type to a pointer. This operation is non-trivial when 1569 /// handling typedefs etc. The canonical type of "T" must be an array type, 1570 /// this returns a pointer to a properly qualified element of the array. 1571 /// 1572 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1573 QualType getArrayDecayedType(QualType T) const; 1574 1575 /// getPromotedIntegerType - Returns the type that Promotable will 1576 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1577 /// integer type. 1578 QualType getPromotedIntegerType(QualType PromotableType) const; 1579 1580 /// \brief Recurses in pointer/array types until it finds an objc retainable 1581 /// type and returns its ownership. 1582 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1583 1584 /// \brief Whether this is a promotable bitfield reference according 1585 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1586 /// 1587 /// \returns the type this bit-field will promote to, or NULL if no 1588 /// promotion occurs. 1589 QualType isPromotableBitField(Expr *E) const; 1590 1591 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1592 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1593 /// LHS < RHS, return -1. 1594 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1595 1596 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1597 /// point types, ignoring the domain of the type (i.e. 'double' == 1598 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1599 /// LHS < RHS, return -1. 1600 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1601 1602 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1603 /// point or a complex type (based on typeDomain/typeSize). 1604 /// 'typeDomain' is a real floating point or complex type. 1605 /// 'typeSize' is a real floating point or complex type. 1606 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1607 QualType typeDomain) const; 1608 1609 unsigned getTargetAddressSpace(QualType T) const { 1610 return getTargetAddressSpace(T.getQualifiers()); 1611 } 1612 1613 unsigned getTargetAddressSpace(Qualifiers Q) const { 1614 return getTargetAddressSpace(Q.getAddressSpace()); 1615 } 1616 1617 unsigned getTargetAddressSpace(unsigned AS) const { 1618 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1619 return AS; 1620 else 1621 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1622 } 1623 1624private: 1625 // Helper for integer ordering 1626 unsigned getIntegerRank(const Type *T) const; 1627 1628public: 1629 1630 //===--------------------------------------------------------------------===// 1631 // Type Compatibility Predicates 1632 //===--------------------------------------------------------------------===// 1633 1634 /// Compatibility predicates used to check assignment expressions. 1635 bool typesAreCompatible(QualType T1, QualType T2, 1636 bool CompareUnqualified = false); // C99 6.2.7p1 1637 1638 bool propertyTypesAreCompatible(QualType, QualType); 1639 bool typesAreBlockPointerCompatible(QualType, QualType); 1640 1641 bool isObjCIdType(QualType T) const { 1642 return T == getObjCIdType(); 1643 } 1644 bool isObjCClassType(QualType T) const { 1645 return T == getObjCClassType(); 1646 } 1647 bool isObjCSelType(QualType T) const { 1648 return T == getObjCSelType(); 1649 } 1650 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1651 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1652 bool ForCompare); 1653 1654 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1655 1656 // Check the safety of assignment from LHS to RHS 1657 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1658 const ObjCObjectPointerType *RHSOPT); 1659 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1660 const ObjCObjectType *RHS); 1661 bool canAssignObjCInterfacesInBlockPointer( 1662 const ObjCObjectPointerType *LHSOPT, 1663 const ObjCObjectPointerType *RHSOPT, 1664 bool BlockReturnType); 1665 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1666 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1667 const ObjCObjectPointerType *RHSOPT); 1668 bool canBindObjCObjectType(QualType To, QualType From); 1669 1670 // Functions for calculating composite types 1671 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1672 bool Unqualified = false, bool BlockReturnType = false); 1673 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1674 bool Unqualified = false); 1675 QualType mergeFunctionArgumentTypes(QualType, QualType, 1676 bool OfBlockPointer=false, 1677 bool Unqualified = false); 1678 QualType mergeTransparentUnionType(QualType, QualType, 1679 bool OfBlockPointer=false, 1680 bool Unqualified = false); 1681 1682 QualType mergeObjCGCQualifiers(QualType, QualType); 1683 1684 bool FunctionTypesMatchOnNSConsumedAttrs( 1685 const FunctionProtoType *FromFunctionType, 1686 const FunctionProtoType *ToFunctionType); 1687 1688 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1689 ObjCLayouts[CD] = 0; 1690 } 1691 1692 //===--------------------------------------------------------------------===// 1693 // Integer Predicates 1694 //===--------------------------------------------------------------------===// 1695 1696 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1697 // of bits in an integer type excluding any padding bits. 1698 unsigned getIntWidth(QualType T) const; 1699 1700 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1701 // unsigned integer type. This method takes a signed type, and returns the 1702 // corresponding unsigned integer type. 1703 QualType getCorrespondingUnsignedType(QualType T); 1704 1705 //===--------------------------------------------------------------------===// 1706 // Type Iterators. 1707 //===--------------------------------------------------------------------===// 1708 1709 typedef std::vector<Type*>::iterator type_iterator; 1710 typedef std::vector<Type*>::const_iterator const_type_iterator; 1711 1712 type_iterator types_begin() { return Types.begin(); } 1713 type_iterator types_end() { return Types.end(); } 1714 const_type_iterator types_begin() const { return Types.begin(); } 1715 const_type_iterator types_end() const { return Types.end(); } 1716 1717 //===--------------------------------------------------------------------===// 1718 // Integer Values 1719 //===--------------------------------------------------------------------===// 1720 1721 /// MakeIntValue - Make an APSInt of the appropriate width and 1722 /// signedness for the given \arg Value and integer \arg Type. 1723 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1724 llvm::APSInt Res(getIntWidth(Type), 1725 !Type->isSignedIntegerOrEnumerationType()); 1726 Res = Value; 1727 return Res; 1728 } 1729 1730 bool isSentinelNullExpr(const Expr *E); 1731 1732 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1733 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1734 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1735 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1736 1737 /// \brief returns true if there is at least one \@implementation in TU. 1738 bool AnyObjCImplementation() { 1739 return !ObjCImpls.empty(); 1740 } 1741 1742 /// \brief Set the implementation of ObjCInterfaceDecl. 1743 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1744 ObjCImplementationDecl *ImplD); 1745 /// \brief Set the implementation of ObjCCategoryDecl. 1746 void setObjCImplementation(ObjCCategoryDecl *CatD, 1747 ObjCCategoryImplDecl *ImplD); 1748 1749 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1750 /// interface, or null if non exists. 1751 const ObjCMethodDecl *getObjCMethodRedeclaration( 1752 const ObjCMethodDecl *MD) const { 1753 return ObjCMethodRedecls.lookup(MD); 1754 } 1755 1756 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1757 const ObjCMethodDecl *Redecl) { 1758 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 1759 ObjCMethodRedecls[MD] = Redecl; 1760 } 1761 1762 /// \brief Returns the objc interface that \arg ND belongs to if it is a 1763 /// objc method/property/ivar etc. that is part of an interface, 1764 /// otherwise returns null. 1765 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1766 1767 /// \brief Set the copy inialization expression of a block var decl. 1768 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1769 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1770 /// none exists. 1771 Expr *getBlockVarCopyInits(const VarDecl*VD); 1772 1773 /// \brief Allocate an uninitialized TypeSourceInfo. 1774 /// 1775 /// The caller should initialize the memory held by TypeSourceInfo using 1776 /// the TypeLoc wrappers. 1777 /// 1778 /// \param T the type that will be the basis for type source info. This type 1779 /// should refer to how the declarator was written in source code, not to 1780 /// what type semantic analysis resolved the declarator to. 1781 /// 1782 /// \param Size the size of the type info to create, or 0 if the size 1783 /// should be calculated based on the type. 1784 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1785 1786 /// \brief Allocate a TypeSourceInfo where all locations have been 1787 /// initialized to a given location, which defaults to the empty 1788 /// location. 1789 TypeSourceInfo * 1790 getTrivialTypeSourceInfo(QualType T, 1791 SourceLocation Loc = SourceLocation()) const; 1792 1793 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1794 1795 /// \brief Add a deallocation callback that will be invoked when the 1796 /// ASTContext is destroyed. 1797 /// 1798 /// \brief Callback A callback function that will be invoked on destruction. 1799 /// 1800 /// \brief Data Pointer data that will be provided to the callback function 1801 /// when it is called. 1802 void AddDeallocation(void (*Callback)(void*), void *Data); 1803 1804 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1805 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1806 1807 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1808 /// lazily, only when used; this is only relevant for function or file scoped 1809 /// var definitions. 1810 /// 1811 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1812 /// it is not used. 1813 bool DeclMustBeEmitted(const Decl *D); 1814 1815 /// \brief Retrieve the lambda mangling number for a lambda expression. 1816 unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator); 1817 1818 /// \brief Used by ParmVarDecl to store on the side the 1819 /// index of the parameter when it exceeds the size of the normal bitfield. 1820 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1821 1822 /// \brief Used by ParmVarDecl to retrieve on the side the 1823 /// index of the parameter when it exceeds the size of the normal bitfield. 1824 unsigned getParameterIndex(const ParmVarDecl *D) const; 1825 1826 //===--------------------------------------------------------------------===// 1827 // Statistics 1828 //===--------------------------------------------------------------------===// 1829 1830 /// \brief The number of implicitly-declared default constructors. 1831 static unsigned NumImplicitDefaultConstructors; 1832 1833 /// \brief The number of implicitly-declared default constructors for 1834 /// which declarations were built. 1835 static unsigned NumImplicitDefaultConstructorsDeclared; 1836 1837 /// \brief The number of implicitly-declared copy constructors. 1838 static unsigned NumImplicitCopyConstructors; 1839 1840 /// \brief The number of implicitly-declared copy constructors for 1841 /// which declarations were built. 1842 static unsigned NumImplicitCopyConstructorsDeclared; 1843 1844 /// \brief The number of implicitly-declared move constructors. 1845 static unsigned NumImplicitMoveConstructors; 1846 1847 /// \brief The number of implicitly-declared move constructors for 1848 /// which declarations were built. 1849 static unsigned NumImplicitMoveConstructorsDeclared; 1850 1851 /// \brief The number of implicitly-declared copy assignment operators. 1852 static unsigned NumImplicitCopyAssignmentOperators; 1853 1854 /// \brief The number of implicitly-declared copy assignment operators for 1855 /// which declarations were built. 1856 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1857 1858 /// \brief The number of implicitly-declared move assignment operators. 1859 static unsigned NumImplicitMoveAssignmentOperators; 1860 1861 /// \brief The number of implicitly-declared move assignment operators for 1862 /// which declarations were built. 1863 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1864 1865 /// \brief The number of implicitly-declared destructors. 1866 static unsigned NumImplicitDestructors; 1867 1868 /// \brief The number of implicitly-declared destructors for which 1869 /// declarations were built. 1870 static unsigned NumImplicitDestructorsDeclared; 1871 1872private: 1873 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1874 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1875 1876public: 1877 /// \brief Initialize built-in types. 1878 /// 1879 /// This routine may only be invoked once for a given ASTContext object. 1880 /// It is normally invoked by the ASTContext constructor. However, the 1881 /// constructor can be asked to delay initialization, which places the burden 1882 /// of calling this function on the user of that object. 1883 /// 1884 /// \param Target The target 1885 void InitBuiltinTypes(const TargetInfo &Target); 1886 1887private: 1888 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1889 1890 // Return the ObjC type encoding for a given type. 1891 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1892 bool ExpandPointedToStructures, 1893 bool ExpandStructures, 1894 const FieldDecl *Field, 1895 bool OutermostType = false, 1896 bool EncodingProperty = false, 1897 bool StructField = false, 1898 bool EncodeBlockParameters = false, 1899 bool EncodeClassNames = false) const; 1900 1901 // Adds the encoding of the structure's members. 1902 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1903 const FieldDecl *Field, 1904 bool includeVBases = true) const; 1905 1906 // Adds the encoding of a method parameter or return type. 1907 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 1908 QualType T, std::string& S, 1909 bool Extended) const; 1910 1911 const ASTRecordLayout & 1912 getObjCLayout(const ObjCInterfaceDecl *D, 1913 const ObjCImplementationDecl *Impl) const; 1914 1915private: 1916 /// \brief A set of deallocations that should be performed when the 1917 /// ASTContext is destroyed. 1918 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1919 1920 // FIXME: This currently contains the set of StoredDeclMaps used 1921 // by DeclContext objects. This probably should not be in ASTContext, 1922 // but we include it here so that ASTContext can quickly deallocate them. 1923 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1924 1925 /// \brief A counter used to uniquely identify "blocks". 1926 mutable unsigned int UniqueBlockByRefTypeID; 1927 1928 friend class DeclContext; 1929 friend class DeclarationNameTable; 1930 void ReleaseDeclContextMaps(); 1931}; 1932 1933/// @brief Utility function for constructing a nullary selector. 1934static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 1935 IdentifierInfo* II = &Ctx.Idents.get(name); 1936 return Ctx.Selectors.getSelector(0, &II); 1937} 1938 1939/// @brief Utility function for constructing an unary selector. 1940static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 1941 IdentifierInfo* II = &Ctx.Idents.get(name); 1942 return Ctx.Selectors.getSelector(1, &II); 1943} 1944 1945} // end namespace clang 1946 1947// operator new and delete aren't allowed inside namespaces. 1948 1949/// @brief Placement new for using the ASTContext's allocator. 1950/// 1951/// This placement form of operator new uses the ASTContext's allocator for 1952/// obtaining memory. 1953/// 1954/// IMPORTANT: These are also declared in clang/AST/Attr.h! Any changes here 1955/// need to also be made there. 1956/// 1957/// We intentionally avoid using a nothrow specification here so that the calls 1958/// to this operator will not perform a null check on the result -- the 1959/// underlying allocator never returns null pointers. 1960/// 1961/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1962/// @code 1963/// // Default alignment (8) 1964/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1965/// // Specific alignment 1966/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1967/// @endcode 1968/// Please note that you cannot use delete on the pointer; it must be 1969/// deallocated using an explicit destructor call followed by 1970/// @c Context.Deallocate(Ptr). 1971/// 1972/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1973/// @param C The ASTContext that provides the allocator. 1974/// @param Alignment The alignment of the allocated memory (if the underlying 1975/// allocator supports it). 1976/// @return The allocated memory. Could be NULL. 1977inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1978 size_t Alignment) { 1979 return C.Allocate(Bytes, Alignment); 1980} 1981/// @brief Placement delete companion to the new above. 1982/// 1983/// This operator is just a companion to the new above. There is no way of 1984/// invoking it directly; see the new operator for more details. This operator 1985/// is called implicitly by the compiler if a placement new expression using 1986/// the ASTContext throws in the object constructor. 1987inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 1988 C.Deallocate(Ptr); 1989} 1990 1991/// This placement form of operator new[] uses the ASTContext's allocator for 1992/// obtaining memory. 1993/// 1994/// We intentionally avoid using a nothrow specification here so that the calls 1995/// to this operator will not perform a null check on the result -- the 1996/// underlying allocator never returns null pointers. 1997/// 1998/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1999/// @code 2000/// // Default alignment (8) 2001/// char *data = new (Context) char[10]; 2002/// // Specific alignment 2003/// char *data = new (Context, 4) char[10]; 2004/// @endcode 2005/// Please note that you cannot use delete on the pointer; it must be 2006/// deallocated using an explicit destructor call followed by 2007/// @c Context.Deallocate(Ptr). 2008/// 2009/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2010/// @param C The ASTContext that provides the allocator. 2011/// @param Alignment The alignment of the allocated memory (if the underlying 2012/// allocator supports it). 2013/// @return The allocated memory. Could be NULL. 2014inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2015 size_t Alignment = 8) { 2016 return C.Allocate(Bytes, Alignment); 2017} 2018 2019/// @brief Placement delete[] companion to the new[] above. 2020/// 2021/// This operator is just a companion to the new[] above. There is no way of 2022/// invoking it directly; see the new[] operator for more details. This operator 2023/// is called implicitly by the compiler if a placement new[] expression using 2024/// the ASTContext throws in the object constructor. 2025inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2026 C.Deallocate(Ptr); 2027} 2028 2029#endif 2030