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