ASTContext.h revision ef9b60ffed980864a8db26ad30344be429e58ff5
1//===--- ASTContext.h - Context to hold long-lived AST nodes ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_ASTCONTEXT_H 15#define LLVM_CLANG_AST_ASTCONTEXT_H 16 17#include "clang/Basic/AddressSpaces.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/LangOptions.h" 20#include "clang/Basic/OperatorKinds.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/VersionTuple.h" 23#include "clang/AST/Decl.h" 24#include "clang/AST/NestedNameSpecifier.h" 25#include "clang/AST/PrettyPrinter.h" 26#include "clang/AST/TemplateName.h" 27#include "clang/AST/Type.h" 28#include "clang/AST/CanonicalType.h" 29#include "clang/AST/UsuallyTinyPtrVector.h" 30#include "llvm/ADT/DenseMap.h" 31#include "llvm/ADT/FoldingSet.h" 32#include "llvm/ADT/IntrusiveRefCntPtr.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/Support/Allocator.h" 36#include <vector> 37 38namespace llvm { 39 struct fltSemantics; 40} 41 42namespace clang { 43 class FileManager; 44 class ASTRecordLayout; 45 class BlockExpr; 46 class CharUnits; 47 class DiagnosticsEngine; 48 class Expr; 49 class ExternalASTSource; 50 class ASTMutationListener; 51 class IdentifierTable; 52 class PartialDiagnosticStorageAllocator; 53 class SelectorTable; 54 class SourceManager; 55 class TargetInfo; 56 class CXXABI; 57 // Decls 58 class DeclContext; 59 class CXXMethodDecl; 60 class CXXRecordDecl; 61 class Decl; 62 class FieldDecl; 63 class MangleContext; 64 class ObjCIvarDecl; 65 class ObjCIvarRefExpr; 66 class ObjCPropertyDecl; 67 class ParmVarDecl; 68 class RecordDecl; 69 class StoredDeclsMap; 70 class TagDecl; 71 class TemplateTemplateParmDecl; 72 class TemplateTypeParmDecl; 73 class TranslationUnitDecl; 74 class TypeDecl; 75 class TypedefNameDecl; 76 class UsingDecl; 77 class UsingShadowDecl; 78 class UnresolvedSetIterator; 79 80 namespace Builtin { class Context; } 81 82/// ASTContext - This class holds long-lived AST nodes (such as types and 83/// decls) that can be referred to throughout the semantic analysis of a file. 84class ASTContext : public llvm::RefCountedBase<ASTContext> { 85 ASTContext &this_() { return *this; } 86 87 mutable std::vector<Type*> Types; 88 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 89 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 90 mutable llvm::FoldingSet<PointerType> PointerTypes; 91 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 92 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 93 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 94 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 95 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 96 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 97 mutable std::vector<VariableArrayType*> VariableArrayTypes; 98 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 99 mutable llvm::FoldingSet<DependentSizedExtVectorType> 100 DependentSizedExtVectorTypes; 101 mutable llvm::FoldingSet<VectorType> VectorTypes; 102 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 103 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 104 FunctionProtoTypes; 105 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 106 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 107 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 108 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 109 SubstTemplateTypeParmTypes; 110 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 111 SubstTemplateTypeParmPackTypes; 112 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 113 TemplateSpecializationTypes; 114 mutable llvm::FoldingSet<ParenType> ParenTypes; 115 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 116 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 117 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 118 ASTContext&> 119 DependentTemplateSpecializationTypes; 120 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 121 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 122 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 123 mutable llvm::FoldingSet<AutoType> AutoTypes; 124 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 125 llvm::FoldingSet<AttributedType> AttributedTypes; 126 127 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 128 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 129 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 130 SubstTemplateTemplateParms; 131 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 132 ASTContext&> 133 SubstTemplateTemplateParmPacks; 134 135 /// \brief The set of nested name specifiers. 136 /// 137 /// This set is managed by the NestedNameSpecifier class. 138 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 139 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 140 friend class NestedNameSpecifier; 141 142 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 143 /// This is lazily created. This is intentionally not serialized. 144 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 145 ASTRecordLayouts; 146 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 147 ObjCLayouts; 148 149 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 150 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 151 152 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 153 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 154 155 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 156 /// interface. 157 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 158 159 /// \brief Mapping from __block VarDecls to their copy initialization expr. 160 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 161 162 /// \brief Mapping from class scope functions specialization to their 163 /// template patterns. 164 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 165 ClassScopeSpecializationPattern; 166 167 /// \brief Representation of a "canonical" template template parameter that 168 /// is used in canonical template names. 169 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 170 TemplateTemplateParmDecl *Parm; 171 172 public: 173 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 174 : Parm(Parm) { } 175 176 TemplateTemplateParmDecl *getParam() const { return Parm; } 177 178 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 179 180 static void Profile(llvm::FoldingSetNodeID &ID, 181 TemplateTemplateParmDecl *Parm); 182 }; 183 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 184 CanonTemplateTemplateParms; 185 186 TemplateTemplateParmDecl * 187 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 188 189 /// \brief The typedef for the __int128_t type. 190 mutable TypedefDecl *Int128Decl; 191 192 /// \brief The typedef for the __uint128_t type. 193 mutable TypedefDecl *UInt128Decl; 194 195 /// BuiltinVaListType - built-in va list type. 196 /// This is initially null and set by Sema::LazilyCreateBuiltin when 197 /// a builtin that takes a valist is encountered. 198 QualType BuiltinVaListType; 199 200 /// \brief The typedef for the predefined 'id' type. 201 mutable TypedefDecl *ObjCIdDecl; 202 203 /// \brief The typedef for the predefined 'SEL' type. 204 mutable TypedefDecl *ObjCSelDecl; 205 206 /// \brief The typedef for the predefined 'Class' type. 207 mutable TypedefDecl *ObjCClassDecl; 208 209 /// \brief The typedef for the predefined 'Protocol' class in Objective-C. 210 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 211 212 // Typedefs which may be provided defining the structure of Objective-C 213 // pseudo-builtins 214 QualType ObjCIdRedefinitionType; 215 QualType ObjCClassRedefinitionType; 216 QualType ObjCSelRedefinitionType; 217 218 QualType ObjCConstantStringType; 219 mutable RecordDecl *CFConstantStringTypeDecl; 220 221 /// \brief The typedef declaration for the Objective-C "instancetype" type. 222 TypedefDecl *ObjCInstanceTypeDecl; 223 224 /// \brief The type for the C FILE type. 225 TypeDecl *FILEDecl; 226 227 /// \brief The type for the C jmp_buf type. 228 TypeDecl *jmp_bufDecl; 229 230 /// \brief The type for the C sigjmp_buf type. 231 TypeDecl *sigjmp_bufDecl; 232 233 /// \brief The type for the C ucontext_t type. 234 TypeDecl *ucontext_tDecl; 235 236 /// \brief Type for the Block descriptor for Blocks CodeGen. 237 /// 238 /// Since this is only used for generation of debug info, it is not 239 /// serialized. 240 mutable RecordDecl *BlockDescriptorType; 241 242 /// \brief Type for the Block descriptor for Blocks CodeGen. 243 /// 244 /// Since this is only used for generation of debug info, it is not 245 /// serialized. 246 mutable RecordDecl *BlockDescriptorExtendedType; 247 248 /// \brief Declaration for the CUDA cudaConfigureCall function. 249 FunctionDecl *cudaConfigureCallDecl; 250 251 TypeSourceInfo NullTypeSourceInfo; 252 253 /// \brief Keeps track of all declaration attributes. 254 /// 255 /// Since so few decls have attrs, we keep them in a hash map instead of 256 /// wasting space in the Decl class. 257 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 258 259 /// \brief Keeps track of the static data member templates from which 260 /// static data members of class template specializations were instantiated. 261 /// 262 /// This data structure stores the mapping from instantiations of static 263 /// data members to the static data member representations within the 264 /// class template from which they were instantiated along with the kind 265 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 266 /// 267 /// Given the following example: 268 /// 269 /// \code 270 /// template<typename T> 271 /// struct X { 272 /// static T value; 273 /// }; 274 /// 275 /// template<typename T> 276 /// T X<T>::value = T(17); 277 /// 278 /// int *x = &X<int>::value; 279 /// \endcode 280 /// 281 /// This mapping will contain an entry that maps from the VarDecl for 282 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 283 /// class template X) and will be marked TSK_ImplicitInstantiation. 284 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 285 InstantiatedFromStaticDataMember; 286 287 /// \brief Keeps track of the declaration from which a UsingDecl was 288 /// created during instantiation. The source declaration is always 289 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 290 /// UnresolvedUsingTypenameDecl. 291 /// 292 /// For example: 293 /// \code 294 /// template<typename T> 295 /// struct A { 296 /// void f(); 297 /// }; 298 /// 299 /// template<typename T> 300 /// struct B : A<T> { 301 /// using A<T>::f; 302 /// }; 303 /// 304 /// template struct B<int>; 305 /// \endcode 306 /// 307 /// This mapping will contain an entry that maps from the UsingDecl in 308 /// B<int> to the UnresolvedUsingDecl in B<T>. 309 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 310 311 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 312 InstantiatedFromUsingShadowDecl; 313 314 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 315 316 /// \brief Mapping that stores the methods overridden by a given C++ 317 /// member function. 318 /// 319 /// Since most C++ member functions aren't virtual and therefore 320 /// don't override anything, we store the overridden functions in 321 /// this map on the side rather than within the CXXMethodDecl structure. 322 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 323 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 324 325 /// \brief Mapping that stores parameterIndex values for ParmVarDecls 326 /// when that value exceeds the bitfield size of 327 /// ParmVarDeclBits.ParameterIndex. 328 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 329 ParameterIndexTable ParamIndices; 330 331 ImportDecl *FirstLocalImport; 332 ImportDecl *LastLocalImport; 333 334 TranslationUnitDecl *TUDecl; 335 336 /// SourceMgr - The associated SourceManager object. 337 SourceManager &SourceMgr; 338 339 /// LangOpts - The language options used to create the AST associated with 340 /// this ASTContext object. 341 LangOptions &LangOpts; 342 343 /// \brief The allocator used to create AST objects. 344 /// 345 /// AST objects are never destructed; rather, all memory associated with the 346 /// AST objects will be released when the ASTContext itself is destroyed. 347 mutable llvm::BumpPtrAllocator BumpAlloc; 348 349 /// \brief Allocator for partial diagnostics. 350 PartialDiagnosticStorageAllocator *DiagAllocator; 351 352 /// \brief The current C++ ABI. 353 llvm::OwningPtr<CXXABI> ABI; 354 CXXABI *createCXXABI(const TargetInfo &T); 355 356 /// \brief The logical -> physical address space map. 357 const LangAS::Map *AddrSpaceMap; 358 359 friend class ASTDeclReader; 360 friend class ASTReader; 361 friend class ASTWriter; 362 363 const TargetInfo *Target; 364 clang::PrintingPolicy PrintingPolicy; 365 366public: 367 IdentifierTable &Idents; 368 SelectorTable &Selectors; 369 Builtin::Context &BuiltinInfo; 370 mutable DeclarationNameTable DeclarationNames; 371 llvm::OwningPtr<ExternalASTSource> ExternalSource; 372 ASTMutationListener *Listener; 373 374 clang::PrintingPolicy getPrintingPolicy() const { return PrintingPolicy; } 375 376 void setPrintingPolicy(clang::PrintingPolicy Policy) { 377 PrintingPolicy = Policy; 378 } 379 380 SourceManager& getSourceManager() { return SourceMgr; } 381 const SourceManager& getSourceManager() const { return SourceMgr; } 382 void *Allocate(unsigned Size, unsigned Align = 8) const { 383 return BumpAlloc.Allocate(Size, Align); 384 } 385 void Deallocate(void *Ptr) const { } 386 387 /// Return the total amount of physical memory allocated for representing 388 /// AST nodes and type information. 389 size_t getASTAllocatedMemory() const { 390 return BumpAlloc.getTotalMemory(); 391 } 392 /// Return the total memory used for various side tables. 393 size_t getSideTableAllocatedMemory() const; 394 395 PartialDiagnosticStorageAllocator &getDiagAllocator() { 396 return *DiagAllocator; 397 } 398 399 const TargetInfo &getTargetInfo() const { return *Target; } 400 401 const LangOptions& getLangOptions() const { return LangOpts; } 402 403 DiagnosticsEngine &getDiagnostics() const; 404 405 FullSourceLoc getFullLoc(SourceLocation Loc) const { 406 return FullSourceLoc(Loc,SourceMgr); 407 } 408 409 /// \brief Retrieve the attributes for the given declaration. 410 AttrVec& getDeclAttrs(const Decl *D); 411 412 /// \brief Erase the attributes corresponding to the given declaration. 413 void eraseDeclAttrs(const Decl *D); 414 415 /// \brief If this variable is an instantiated static data member of a 416 /// class template specialization, returns the templated static data member 417 /// from which it was instantiated. 418 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 419 const VarDecl *Var); 420 421 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 422 423 void setClassScopeSpecializationPattern(FunctionDecl *FD, 424 FunctionDecl *Pattern); 425 426 /// \brief Note that the static data member \p Inst is an instantiation of 427 /// the static data member template \p Tmpl of a class template. 428 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 429 TemplateSpecializationKind TSK, 430 SourceLocation PointOfInstantiation = SourceLocation()); 431 432 /// \brief If the given using decl is an instantiation of a 433 /// (possibly unresolved) using decl from a template instantiation, 434 /// return it. 435 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 436 437 /// \brief Remember that the using decl \p Inst is an instantiation 438 /// of the using decl \p Pattern of a class template. 439 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 440 441 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 442 UsingShadowDecl *Pattern); 443 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 444 445 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 446 447 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 448 449 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 450 /// bitfield which follows the non-bitfield 'LastFD'. 451 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 452 const FieldDecl *LastFD) const; 453 454 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 455 /// bitfield which follows the bitfield 'LastFD'. 456 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 457 const FieldDecl *LastFD) const; 458 459 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 460 /// bitfield which follows the bitfield 'LastFD'. 461 bool BitfieldFollowsBitfield(const FieldDecl *FD, 462 const FieldDecl *LastFD) const; 463 464 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 465 /// bitfield which follows the bitfield 'LastFD'. 466 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 467 const FieldDecl *LastFD) const; 468 469 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 470 /// bitfield which follows the none bitfield 'LastFD'. 471 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 472 const FieldDecl *LastFD) const; 473 474 // Access to the set of methods overridden by the given C++ method. 475 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 476 overridden_cxx_method_iterator 477 overridden_methods_begin(const CXXMethodDecl *Method) const; 478 479 overridden_cxx_method_iterator 480 overridden_methods_end(const CXXMethodDecl *Method) const; 481 482 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 483 484 /// \brief Note that the given C++ \p Method overrides the given \p 485 /// Overridden method. 486 void addOverriddenMethod(const CXXMethodDecl *Method, 487 const CXXMethodDecl *Overridden); 488 489 /// \brief Notify the AST context that a new import declaration has been 490 /// parsed or implicitly created within this translation unit. 491 void addedLocalImportDecl(ImportDecl *Import); 492 493 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 494 return Import->NextLocalImport; 495 } 496 497 /// \brief Iterator that visits import declarations. 498 class import_iterator { 499 ImportDecl *Import; 500 501 public: 502 typedef ImportDecl *value_type; 503 typedef ImportDecl *reference; 504 typedef ImportDecl *pointer; 505 typedef int difference_type; 506 typedef std::forward_iterator_tag iterator_category; 507 508 import_iterator() : Import() { } 509 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 510 511 reference operator*() const { return Import; } 512 pointer operator->() const { return Import; } 513 514 import_iterator &operator++() { 515 Import = ASTContext::getNextLocalImport(Import); 516 return *this; 517 } 518 519 import_iterator operator++(int) { 520 import_iterator Other(*this); 521 ++(*this); 522 return Other; 523 } 524 525 friend bool operator==(import_iterator X, import_iterator Y) { 526 return X.Import == Y.Import; 527 } 528 529 friend bool operator!=(import_iterator X, import_iterator Y) { 530 return X.Import != Y.Import; 531 } 532 }; 533 534 import_iterator local_import_begin() const { 535 return import_iterator(FirstLocalImport); 536 } 537 import_iterator local_import_end() const { return import_iterator(); } 538 539 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 540 541 542 // Builtin Types. 543 CanQualType VoidTy; 544 CanQualType BoolTy; 545 CanQualType CharTy; 546 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 547 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 548 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 549 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 550 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 551 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 552 CanQualType FloatTy, DoubleTy, LongDoubleTy; 553 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 554 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 555 CanQualType VoidPtrTy, NullPtrTy; 556 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 557 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 558 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 559 560 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 561 mutable QualType AutoDeductTy; // Deduction against 'auto'. 562 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 563 564 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 565 IdentifierTable &idents, SelectorTable &sels, 566 Builtin::Context &builtins, 567 unsigned size_reserve, 568 bool DelayInitialization = false); 569 570 ~ASTContext(); 571 572 /// \brief Attach an external AST source to the AST context. 573 /// 574 /// The external AST source provides the ability to load parts of 575 /// the abstract syntax tree as needed from some external storage, 576 /// e.g., a precompiled header. 577 void setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source); 578 579 /// \brief Retrieve a pointer to the external AST source associated 580 /// with this AST context, if any. 581 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 582 583 /// \brief Attach an AST mutation listener to the AST context. 584 /// 585 /// The AST mutation listener provides the ability to track modifications to 586 /// the abstract syntax tree entities committed after they were initially 587 /// created. 588 void setASTMutationListener(ASTMutationListener *Listener) { 589 this->Listener = Listener; 590 } 591 592 /// \brief Retrieve a pointer to the AST mutation listener associated 593 /// with this AST context, if any. 594 ASTMutationListener *getASTMutationListener() const { return Listener; } 595 596 void PrintStats() const; 597 const std::vector<Type*>& getTypes() const { return Types; } 598 599 /// \brief Retrieve the declaration for the 128-bit signed integer type. 600 TypedefDecl *getInt128Decl() const; 601 602 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 603 TypedefDecl *getUInt128Decl() const; 604 605 //===--------------------------------------------------------------------===// 606 // Type Constructors 607 //===--------------------------------------------------------------------===// 608 609private: 610 /// getExtQualType - Return a type with extended qualifiers. 611 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 612 613 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 614 615public: 616 /// getAddSpaceQualType - Return the uniqued reference to the type for an 617 /// address space qualified type with the specified type and address space. 618 /// The resulting type has a union of the qualifiers from T and the address 619 /// space. If T already has an address space specifier, it is silently 620 /// replaced. 621 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 622 623 /// getObjCGCQualType - Returns the uniqued reference to the type for an 624 /// objc gc qualified type. The retulting type has a union of the qualifiers 625 /// from T and the gc attribute. 626 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 627 628 /// getRestrictType - Returns the uniqued reference to the type for a 629 /// 'restrict' qualified type. The resulting type has a union of the 630 /// qualifiers from T and 'restrict'. 631 QualType getRestrictType(QualType T) const { 632 return T.withFastQualifiers(Qualifiers::Restrict); 633 } 634 635 /// getVolatileType - Returns the uniqued reference to the type for a 636 /// 'volatile' qualified type. The resulting type has a union of the 637 /// qualifiers from T and 'volatile'. 638 QualType getVolatileType(QualType T) const { 639 return T.withFastQualifiers(Qualifiers::Volatile); 640 } 641 642 /// getConstType - Returns the uniqued reference to the type for a 643 /// 'const' qualified type. The resulting type has a union of the 644 /// qualifiers from T and 'const'. 645 /// 646 /// It can be reasonably expected that this will always be 647 /// equivalent to calling T.withConst(). 648 QualType getConstType(QualType T) const { return T.withConst(); } 649 650 /// adjustFunctionType - Change the ExtInfo on a function type. 651 const FunctionType *adjustFunctionType(const FunctionType *Fn, 652 FunctionType::ExtInfo EInfo); 653 654 /// getComplexType - Return the uniqued reference to the type for a complex 655 /// number with the specified element type. 656 QualType getComplexType(QualType T) const; 657 CanQualType getComplexType(CanQualType T) const { 658 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 659 } 660 661 /// getPointerType - Return the uniqued reference to the type for a pointer to 662 /// the specified type. 663 QualType getPointerType(QualType T) const; 664 CanQualType getPointerType(CanQualType T) const { 665 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 666 } 667 668 /// getAtomicType - Return the uniqued reference to the atomic type for 669 /// the specified type. 670 QualType getAtomicType(QualType T) const; 671 672 /// getBlockPointerType - Return the uniqued reference to the type for a block 673 /// of the specified type. 674 QualType getBlockPointerType(QualType T) const; 675 676 /// This gets the struct used to keep track of the descriptor for pointer to 677 /// blocks. 678 QualType getBlockDescriptorType() const; 679 680 /// This gets the struct used to keep track of the extended descriptor for 681 /// pointer to blocks. 682 QualType getBlockDescriptorExtendedType() const; 683 684 void setcudaConfigureCallDecl(FunctionDecl *FD) { 685 cudaConfigureCallDecl = FD; 686 } 687 FunctionDecl *getcudaConfigureCallDecl() { 688 return cudaConfigureCallDecl; 689 } 690 691 /// This builds the struct used for __block variables. 692 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 693 694 /// Returns true iff we need copy/dispose helpers for the given type. 695 bool BlockRequiresCopying(QualType Ty) const; 696 697 /// getLValueReferenceType - Return the uniqued reference to the type for an 698 /// lvalue reference to the specified type. 699 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 700 const; 701 702 /// getRValueReferenceType - Return the uniqued reference to the type for an 703 /// rvalue reference to the specified type. 704 QualType getRValueReferenceType(QualType T) const; 705 706 /// getMemberPointerType - Return the uniqued reference to the type for a 707 /// member pointer to the specified type in the specified class. The class 708 /// is a Type because it could be a dependent name. 709 QualType getMemberPointerType(QualType T, const Type *Cls) const; 710 711 /// getVariableArrayType - Returns a non-unique reference to the type for a 712 /// variable array of the specified element type. 713 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 714 ArrayType::ArraySizeModifier ASM, 715 unsigned IndexTypeQuals, 716 SourceRange Brackets) const; 717 718 /// getDependentSizedArrayType - Returns a non-unique reference to 719 /// the type for a dependently-sized array of the specified element 720 /// type. FIXME: We will need these to be uniqued, or at least 721 /// comparable, at some point. 722 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 723 ArrayType::ArraySizeModifier ASM, 724 unsigned IndexTypeQuals, 725 SourceRange Brackets) const; 726 727 /// getIncompleteArrayType - Returns a unique reference to the type for a 728 /// incomplete array of the specified element type. 729 QualType getIncompleteArrayType(QualType EltTy, 730 ArrayType::ArraySizeModifier ASM, 731 unsigned IndexTypeQuals) const; 732 733 /// getConstantArrayType - Return the unique reference to the type for a 734 /// constant array of the specified element type. 735 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 736 ArrayType::ArraySizeModifier ASM, 737 unsigned IndexTypeQuals) const; 738 739 /// getVariableArrayDecayedType - Returns a vla type where known sizes 740 /// are replaced with [*]. 741 QualType getVariableArrayDecayedType(QualType Ty) const; 742 743 /// getVectorType - Return the unique reference to a vector type of 744 /// the specified element type and size. VectorType must be a built-in type. 745 QualType getVectorType(QualType VectorType, unsigned NumElts, 746 VectorType::VectorKind VecKind) const; 747 748 /// getExtVectorType - Return the unique reference to an extended vector type 749 /// of the specified element type and size. VectorType must be a built-in 750 /// type. 751 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 752 753 /// getDependentSizedExtVectorType - Returns a non-unique reference to 754 /// the type for a dependently-sized vector of the specified element 755 /// type. FIXME: We will need these to be uniqued, or at least 756 /// comparable, at some point. 757 QualType getDependentSizedExtVectorType(QualType VectorType, 758 Expr *SizeExpr, 759 SourceLocation AttrLoc) const; 760 761 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 762 /// 763 QualType getFunctionNoProtoType(QualType ResultTy, 764 const FunctionType::ExtInfo &Info) const; 765 766 QualType getFunctionNoProtoType(QualType ResultTy) const { 767 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 768 } 769 770 /// getFunctionType - Return a normal function type with a typed 771 /// argument list. 772 QualType getFunctionType(QualType ResultTy, 773 const QualType *Args, unsigned NumArgs, 774 const FunctionProtoType::ExtProtoInfo &EPI) const; 775 776 /// getTypeDeclType - Return the unique reference to the type for 777 /// the specified type declaration. 778 QualType getTypeDeclType(const TypeDecl *Decl, 779 const TypeDecl *PrevDecl = 0) const { 780 assert(Decl && "Passed null for Decl param"); 781 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 782 783 if (PrevDecl) { 784 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 785 Decl->TypeForDecl = PrevDecl->TypeForDecl; 786 return QualType(PrevDecl->TypeForDecl, 0); 787 } 788 789 return getTypeDeclTypeSlow(Decl); 790 } 791 792 /// getTypedefType - Return the unique reference to the type for the 793 /// specified typedef-name decl. 794 QualType getTypedefType(const TypedefNameDecl *Decl, 795 QualType Canon = QualType()) const; 796 797 QualType getRecordType(const RecordDecl *Decl) const; 798 799 QualType getEnumType(const EnumDecl *Decl) const; 800 801 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 802 803 QualType getAttributedType(AttributedType::Kind attrKind, 804 QualType modifiedType, 805 QualType equivalentType); 806 807 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 808 QualType Replacement) const; 809 QualType getSubstTemplateTypeParmPackType( 810 const TemplateTypeParmType *Replaced, 811 const TemplateArgument &ArgPack); 812 813 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 814 bool ParameterPack, 815 TemplateTypeParmDecl *ParmDecl = 0) const; 816 817 QualType getTemplateSpecializationType(TemplateName T, 818 const TemplateArgument *Args, 819 unsigned NumArgs, 820 QualType Canon = QualType()) const; 821 822 QualType getCanonicalTemplateSpecializationType(TemplateName T, 823 const TemplateArgument *Args, 824 unsigned NumArgs) const; 825 826 QualType getTemplateSpecializationType(TemplateName T, 827 const TemplateArgumentListInfo &Args, 828 QualType Canon = QualType()) const; 829 830 TypeSourceInfo * 831 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 832 const TemplateArgumentListInfo &Args, 833 QualType Canon = QualType()) const; 834 835 QualType getParenType(QualType NamedType) const; 836 837 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 838 NestedNameSpecifier *NNS, 839 QualType NamedType) const; 840 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 841 NestedNameSpecifier *NNS, 842 const IdentifierInfo *Name, 843 QualType Canon = QualType()) const; 844 845 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 846 NestedNameSpecifier *NNS, 847 const IdentifierInfo *Name, 848 const TemplateArgumentListInfo &Args) const; 849 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 850 NestedNameSpecifier *NNS, 851 const IdentifierInfo *Name, 852 unsigned NumArgs, 853 const TemplateArgument *Args) const; 854 855 QualType getPackExpansionType(QualType Pattern, 856 llvm::Optional<unsigned> NumExpansions); 857 858 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 859 ObjCInterfaceDecl *PrevDecl = 0) const; 860 861 QualType getObjCObjectType(QualType Base, 862 ObjCProtocolDecl * const *Protocols, 863 unsigned NumProtocols) const; 864 865 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 866 /// for the given ObjCObjectType. 867 QualType getObjCObjectPointerType(QualType OIT) const; 868 869 /// getTypeOfType - GCC extension. 870 QualType getTypeOfExprType(Expr *e) const; 871 QualType getTypeOfType(QualType t) const; 872 873 /// getDecltypeType - C++0x decltype. 874 QualType getDecltypeType(Expr *e) const; 875 876 /// getUnaryTransformType - unary type transforms 877 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 878 UnaryTransformType::UTTKind UKind) const; 879 880 /// getAutoType - C++0x deduced auto type. 881 QualType getAutoType(QualType DeducedType) const; 882 883 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 884 QualType getAutoDeductType() const; 885 886 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 887 QualType getAutoRRefDeductType() const; 888 889 /// getTagDeclType - Return the unique reference to the type for the 890 /// specified TagDecl (struct/union/class/enum) decl. 891 QualType getTagDeclType(const TagDecl *Decl) const; 892 893 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 894 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 895 CanQualType getSizeType() const; 896 897 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5), 898 /// defined in <stdint.h>. 899 CanQualType getIntMaxType() const; 900 901 /// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5), 902 /// defined in <stdint.h>. 903 CanQualType getUIntMaxType() const; 904 905 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 906 /// returns a type compatible with the type defined in <stddef.h> as defined 907 /// by the target. 908 QualType getWCharType() const { return WCharTy; } 909 910 /// getSignedWCharType - Return the type of "signed wchar_t". 911 /// Used when in C++, as a GCC extension. 912 QualType getSignedWCharType() const; 913 914 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 915 /// Used when in C++, as a GCC extension. 916 QualType getUnsignedWCharType() const; 917 918 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 919 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 920 QualType getPointerDiffType() const; 921 922 // getCFConstantStringType - Return the C structure type used to represent 923 // constant CFStrings. 924 QualType getCFConstantStringType() const; 925 926 /// Get the structure type used to representation CFStrings, or NULL 927 /// if it hasn't yet been built. 928 QualType getRawCFConstantStringType() const { 929 if (CFConstantStringTypeDecl) 930 return getTagDeclType(CFConstantStringTypeDecl); 931 return QualType(); 932 } 933 void setCFConstantStringType(QualType T); 934 935 // This setter/getter represents the ObjC type for an NSConstantString. 936 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 937 QualType getObjCConstantStringInterface() const { 938 return ObjCConstantStringType; 939 } 940 941 /// \brief Retrieve the type that 'id' has been defined to, which may be 942 /// different from the built-in 'id' if 'id' has been typedef'd. 943 QualType getObjCIdRedefinitionType() const { 944 if (ObjCIdRedefinitionType.isNull()) 945 return getObjCIdType(); 946 return ObjCIdRedefinitionType; 947 } 948 949 /// \brief Set the user-written type that redefines 'id'. 950 void setObjCIdRedefinitionType(QualType RedefType) { 951 ObjCIdRedefinitionType = RedefType; 952 } 953 954 /// \brief Retrieve the type that 'Class' has been defined to, which may be 955 /// different from the built-in 'Class' if 'Class' has been typedef'd. 956 QualType getObjCClassRedefinitionType() const { 957 if (ObjCClassRedefinitionType.isNull()) 958 return getObjCClassType(); 959 return ObjCClassRedefinitionType; 960 } 961 962 /// \brief Set the user-written type that redefines 'SEL'. 963 void setObjCClassRedefinitionType(QualType RedefType) { 964 ObjCClassRedefinitionType = RedefType; 965 } 966 967 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 968 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 969 QualType getObjCSelRedefinitionType() const { 970 if (ObjCSelRedefinitionType.isNull()) 971 return getObjCSelType(); 972 return ObjCSelRedefinitionType; 973 } 974 975 976 /// \brief Set the user-written type that redefines 'SEL'. 977 void setObjCSelRedefinitionType(QualType RedefType) { 978 ObjCSelRedefinitionType = RedefType; 979 } 980 981 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 982 /// otherwise, returns a NULL type; 983 QualType getObjCInstanceType() { 984 return getTypeDeclType(getObjCInstanceTypeDecl()); 985 } 986 987 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 988 /// "instancetype" type. 989 TypedefDecl *getObjCInstanceTypeDecl(); 990 991 /// \brief Set the type for the C FILE type. 992 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 993 994 /// \brief Retrieve the C FILE type. 995 QualType getFILEType() const { 996 if (FILEDecl) 997 return getTypeDeclType(FILEDecl); 998 return QualType(); 999 } 1000 1001 /// \brief Set the type for the C jmp_buf type. 1002 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1003 this->jmp_bufDecl = jmp_bufDecl; 1004 } 1005 1006 /// \brief Retrieve the C jmp_buf type. 1007 QualType getjmp_bufType() const { 1008 if (jmp_bufDecl) 1009 return getTypeDeclType(jmp_bufDecl); 1010 return QualType(); 1011 } 1012 1013 /// \brief Set the type for the C sigjmp_buf type. 1014 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1015 this->sigjmp_bufDecl = sigjmp_bufDecl; 1016 } 1017 1018 /// \brief Retrieve the C sigjmp_buf type. 1019 QualType getsigjmp_bufType() const { 1020 if (sigjmp_bufDecl) 1021 return getTypeDeclType(sigjmp_bufDecl); 1022 return QualType(); 1023 } 1024 1025 /// \brief Set the type for the C ucontext_t type. 1026 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1027 this->ucontext_tDecl = ucontext_tDecl; 1028 } 1029 1030 /// \brief Retrieve the C ucontext_t type. 1031 QualType getucontext_tType() const { 1032 if (ucontext_tDecl) 1033 return getTypeDeclType(ucontext_tDecl); 1034 return QualType(); 1035 } 1036 1037 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1038 QualType getLogicalOperationType() const { 1039 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 1040 } 1041 1042 /// getObjCEncodingForType - Emit the ObjC type encoding for the 1043 /// given type into \arg S. If \arg NameFields is specified then 1044 /// record field names are also encoded. 1045 void getObjCEncodingForType(QualType t, std::string &S, 1046 const FieldDecl *Field=0) const; 1047 1048 void getLegacyIntegralTypeEncoding(QualType &t) const; 1049 1050 // Put the string version of type qualifiers into S. 1051 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1052 std::string &S) const; 1053 1054 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 1055 /// function. This is in the same format as Objective-C method encodings. 1056 /// 1057 /// \returns true if an error occurred (e.g., because one of the parameter 1058 /// types is incomplete), false otherwise. 1059 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1060 1061 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 1062 /// declaration. 1063 /// 1064 /// \returns true if an error occurred (e.g., because one of the parameter 1065 /// types is incomplete), false otherwise. 1066 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1067 bool Extended = false) 1068 const; 1069 1070 /// getObjCEncodingForBlock - Return the encoded type for this block 1071 /// declaration. 1072 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1073 1074 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1075 /// this method declaration. If non-NULL, Container must be either 1076 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1077 /// only be NULL when getting encodings for protocol properties. 1078 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1079 const Decl *Container, 1080 std::string &S) const; 1081 1082 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1083 ObjCProtocolDecl *rProto) const; 1084 1085 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 1086 /// purpose in characters. 1087 CharUnits getObjCEncodingTypeSize(QualType t) const; 1088 1089 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 1090 /// in Objective-C. 1091 TypedefDecl *getObjCIdDecl() const; 1092 1093 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 1094 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 1095 QualType getObjCIdType() const { 1096 return getTypeDeclType(getObjCIdDecl()); 1097 } 1098 1099 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1100 /// in Objective-C. 1101 TypedefDecl *getObjCSelDecl() const; 1102 1103 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1104 /// 'SEL' type. 1105 QualType getObjCSelType() const { 1106 return getTypeDeclType(getObjCSelDecl()); 1107 } 1108 1109 /// \brief Retrieve the typedef declaration corresponding to the predefined 1110 /// Objective-C 'Class' type. 1111 TypedefDecl *getObjCClassDecl() const; 1112 1113 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1114 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1115 /// struct. 1116 QualType getObjCClassType() const { 1117 return getTypeDeclType(getObjCClassDecl()); 1118 } 1119 1120 /// \brief Retrieve the Objective-C class declaration corresponding to 1121 /// the predefined 'Protocol' class. 1122 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1123 1124 /// \brief Retrieve the type of the Objective-C "Protocol" class. 1125 QualType getObjCProtoType() const { 1126 return getObjCInterfaceType(getObjCProtocolDecl()); 1127 } 1128 1129 void setBuiltinVaListType(QualType T); 1130 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 1131 1132 /// getCVRQualifiedType - Returns a type with additional const, 1133 /// volatile, or restrict qualifiers. 1134 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1135 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1136 } 1137 1138 /// getQualifiedType - Returns a type with additional qualifiers. 1139 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1140 if (!Qs.hasNonFastQualifiers()) 1141 return T.withFastQualifiers(Qs.getFastQualifiers()); 1142 QualifierCollector Qc(Qs); 1143 const Type *Ptr = Qc.strip(T); 1144 return getExtQualType(Ptr, Qc); 1145 } 1146 1147 /// getQualifiedType - Returns a type with additional qualifiers. 1148 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1149 if (!Qs.hasNonFastQualifiers()) 1150 return QualType(T, Qs.getFastQualifiers()); 1151 return getExtQualType(T, Qs); 1152 } 1153 1154 /// getLifetimeQualifiedType - Returns a type with the given 1155 /// lifetime qualifier. 1156 QualType getLifetimeQualifiedType(QualType type, 1157 Qualifiers::ObjCLifetime lifetime) { 1158 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1159 assert(lifetime != Qualifiers::OCL_None); 1160 1161 Qualifiers qs; 1162 qs.addObjCLifetime(lifetime); 1163 return getQualifiedType(type, qs); 1164 } 1165 1166 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1167 SourceLocation NameLoc) const; 1168 1169 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1170 UnresolvedSetIterator End) const; 1171 1172 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1173 bool TemplateKeyword, 1174 TemplateDecl *Template) const; 1175 1176 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1177 const IdentifierInfo *Name) const; 1178 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1179 OverloadedOperatorKind Operator) const; 1180 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1181 TemplateName replacement) const; 1182 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1183 const TemplateArgument &ArgPack) const; 1184 1185 enum GetBuiltinTypeError { 1186 GE_None, //< No error 1187 GE_Missing_stdio, //< Missing a type from <stdio.h> 1188 GE_Missing_setjmp, //< Missing a type from <setjmp.h> 1189 GE_Missing_ucontext //< Missing a type from <ucontext.h> 1190 }; 1191 1192 /// GetBuiltinType - Return the type for the specified builtin. If 1193 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1194 /// arguments to the builtin that are required to be integer constant 1195 /// expressions. 1196 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1197 unsigned *IntegerConstantArgs = 0) const; 1198 1199private: 1200 CanQualType getFromTargetType(unsigned Type) const; 1201 1202 //===--------------------------------------------------------------------===// 1203 // Type Predicates. 1204 //===--------------------------------------------------------------------===// 1205 1206public: 1207 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1208 /// garbage collection attribute. 1209 /// 1210 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1211 1212 /// areCompatibleVectorTypes - Return true if the given vector types 1213 /// are of the same unqualified type or if they are equivalent to the same 1214 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1215 /// Neon) types. 1216 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1217 1218 /// isObjCNSObjectType - Return true if this is an NSObject object with 1219 /// its NSObject attribute set. 1220 static bool isObjCNSObjectType(QualType Ty) { 1221 return Ty->isObjCNSObjectType(); 1222 } 1223 1224 //===--------------------------------------------------------------------===// 1225 // Type Sizing and Analysis 1226 //===--------------------------------------------------------------------===// 1227 1228 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1229 /// scalar floating point type. 1230 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1231 1232 /// getTypeInfo - Get the size and alignment of the specified complete type in 1233 /// bits. 1234 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1235 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1236 return getTypeInfo(T.getTypePtr()); 1237 } 1238 1239 /// getTypeSize - Return the size of the specified type, in bits. This method 1240 /// does not work on incomplete types. 1241 uint64_t getTypeSize(QualType T) const { 1242 return getTypeInfo(T).first; 1243 } 1244 uint64_t getTypeSize(const Type *T) const { 1245 return getTypeInfo(T).first; 1246 } 1247 1248 /// getCharWidth - Return the size of the character type, in bits 1249 uint64_t getCharWidth() const { 1250 return getTypeSize(CharTy); 1251 } 1252 1253 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1254 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1255 1256 /// toBits - Convert a size in characters to a size in bits. 1257 int64_t toBits(CharUnits CharSize) const; 1258 1259 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1260 /// This method does not work on incomplete types. 1261 CharUnits getTypeSizeInChars(QualType T) const; 1262 CharUnits getTypeSizeInChars(const Type *T) const; 1263 1264 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1265 /// This method does not work on incomplete types. 1266 unsigned getTypeAlign(QualType T) const { 1267 return getTypeInfo(T).second; 1268 } 1269 unsigned getTypeAlign(const Type *T) const { 1270 return getTypeInfo(T).second; 1271 } 1272 1273 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1274 /// characters. This method does not work on incomplete types. 1275 CharUnits getTypeAlignInChars(QualType T) const; 1276 CharUnits getTypeAlignInChars(const Type *T) const; 1277 1278 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1279 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1280 1281 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1282 /// type for the current target in bits. This can be different than the ABI 1283 /// alignment in cases where it is beneficial for performance to overalign 1284 /// a data type. 1285 unsigned getPreferredTypeAlign(const Type *T) const; 1286 1287 /// getDeclAlign - Return a conservative estimate of the alignment of 1288 /// the specified decl. Note that bitfields do not have a valid alignment, so 1289 /// this method will assert on them. 1290 /// If @p RefAsPointee, references are treated like their underlying type 1291 /// (for alignof), else they're treated like pointers (for CodeGen). 1292 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1293 1294 /// getASTRecordLayout - Get or compute information about the layout of the 1295 /// specified record (struct/union/class), which indicates its size and field 1296 /// position information. 1297 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1298 1299 /// getASTObjCInterfaceLayout - Get or compute information about the 1300 /// layout of the specified Objective-C interface. 1301 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1302 const; 1303 1304 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1305 bool Simple = false) const; 1306 1307 /// getASTObjCImplementationLayout - Get or compute information about 1308 /// the layout of the specified Objective-C implementation. This may 1309 /// differ from the interface if synthesized ivars are present. 1310 const ASTRecordLayout & 1311 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1312 1313 /// getKeyFunction - Get the key function for the given record decl, or NULL 1314 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1315 /// section 5.2.3: 1316 /// 1317 /// ...the first non-pure virtual function that is not inline at the point 1318 /// of class definition. 1319 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1320 1321 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1322 uint64_t getFieldOffset(const ValueDecl *FD) const; 1323 1324 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1325 1326 MangleContext *createMangleContext(); 1327 1328 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1329 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1330 1331 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1332 void CollectInheritedProtocols(const Decl *CDecl, 1333 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1334 1335 //===--------------------------------------------------------------------===// 1336 // Type Operators 1337 //===--------------------------------------------------------------------===// 1338 1339 /// getCanonicalType - Return the canonical (structural) type corresponding to 1340 /// the specified potentially non-canonical type. The non-canonical version 1341 /// of a type may have many "decorated" versions of types. Decorators can 1342 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1343 /// to be free of any of these, allowing two canonical types to be compared 1344 /// for exact equality with a simple pointer comparison. 1345 CanQualType getCanonicalType(QualType T) const { 1346 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1347 } 1348 1349 const Type *getCanonicalType(const Type *T) const { 1350 return T->getCanonicalTypeInternal().getTypePtr(); 1351 } 1352 1353 /// getCanonicalParamType - Return the canonical parameter type 1354 /// corresponding to the specific potentially non-canonical one. 1355 /// Qualifiers are stripped off, functions are turned into function 1356 /// pointers, and arrays decay one level into pointers. 1357 CanQualType getCanonicalParamType(QualType T) const; 1358 1359 /// \brief Determine whether the given types are equivalent. 1360 bool hasSameType(QualType T1, QualType T2) const { 1361 return getCanonicalType(T1) == getCanonicalType(T2); 1362 } 1363 1364 /// \brief Returns this type as a completely-unqualified array type, 1365 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1366 /// sugaring from the types, similar to the behavior of 1367 /// QualType::getUnqualifiedType(). 1368 /// 1369 /// \param T is the qualified type, which may be an ArrayType 1370 /// 1371 /// \param Quals will receive the full set of qualifiers that were 1372 /// applied to the array. 1373 /// 1374 /// \returns if this is an array type, the completely unqualified array type 1375 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1376 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1377 1378 /// \brief Determine whether the given types are equivalent after 1379 /// cvr-qualifiers have been removed. 1380 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1381 return getCanonicalType(T1).getTypePtr() == 1382 getCanonicalType(T2).getTypePtr(); 1383 } 1384 1385 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1386 1387 /// \brief Retrieves the "canonical" nested name specifier for a 1388 /// given nested name specifier. 1389 /// 1390 /// The canonical nested name specifier is a nested name specifier 1391 /// that uniquely identifies a type or namespace within the type 1392 /// system. For example, given: 1393 /// 1394 /// \code 1395 /// namespace N { 1396 /// struct S { 1397 /// template<typename T> struct X { typename T* type; }; 1398 /// }; 1399 /// } 1400 /// 1401 /// template<typename T> struct Y { 1402 /// typename N::S::X<T>::type member; 1403 /// }; 1404 /// \endcode 1405 /// 1406 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1407 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1408 /// by declarations in the type system and the canonical type for 1409 /// the template type parameter 'T' is template-param-0-0. 1410 NestedNameSpecifier * 1411 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1412 1413 /// \brief Retrieves the default calling convention to use for 1414 /// C++ instance methods. 1415 CallingConv getDefaultMethodCallConv(); 1416 1417 /// \brief Retrieves the canonical representation of the given 1418 /// calling convention. 1419 CallingConv getCanonicalCallConv(CallingConv CC) const { 1420 if (!LangOpts.MRTD && CC == CC_C) 1421 return CC_Default; 1422 return CC; 1423 } 1424 1425 /// \brief Determines whether two calling conventions name the same 1426 /// calling convention. 1427 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1428 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1429 } 1430 1431 /// \brief Retrieves the "canonical" template name that refers to a 1432 /// given template. 1433 /// 1434 /// The canonical template name is the simplest expression that can 1435 /// be used to refer to a given template. For most templates, this 1436 /// expression is just the template declaration itself. For example, 1437 /// the template std::vector can be referred to via a variety of 1438 /// names---std::vector, ::std::vector, vector (if vector is in 1439 /// scope), etc.---but all of these names map down to the same 1440 /// TemplateDecl, which is used to form the canonical template name. 1441 /// 1442 /// Dependent template names are more interesting. Here, the 1443 /// template name could be something like T::template apply or 1444 /// std::allocator<T>::template rebind, where the nested name 1445 /// specifier itself is dependent. In this case, the canonical 1446 /// template name uses the shortest form of the dependent 1447 /// nested-name-specifier, which itself contains all canonical 1448 /// types, values, and templates. 1449 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1450 1451 /// \brief Determine whether the given template names refer to the same 1452 /// template. 1453 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1454 1455 /// \brief Retrieve the "canonical" template argument. 1456 /// 1457 /// The canonical template argument is the simplest template argument 1458 /// (which may be a type, value, expression, or declaration) that 1459 /// expresses the value of the argument. 1460 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1461 const; 1462 1463 /// Type Query functions. If the type is an instance of the specified class, 1464 /// return the Type pointer for the underlying maximally pretty type. This 1465 /// is a member of ASTContext because this may need to do some amount of 1466 /// canonicalization, e.g. to move type qualifiers into the element type. 1467 const ArrayType *getAsArrayType(QualType T) const; 1468 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1469 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1470 } 1471 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1472 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1473 } 1474 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1475 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1476 } 1477 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1478 const { 1479 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1480 } 1481 1482 /// getBaseElementType - Returns the innermost element type of an array type. 1483 /// For example, will return "int" for int[m][n] 1484 QualType getBaseElementType(const ArrayType *VAT) const; 1485 1486 /// getBaseElementType - Returns the innermost element type of a type 1487 /// (which needn't actually be an array type). 1488 QualType getBaseElementType(QualType QT) const; 1489 1490 /// getConstantArrayElementCount - Returns number of constant array elements. 1491 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1492 1493 /// \brief Perform adjustment on the parameter type of a function. 1494 /// 1495 /// This routine adjusts the given parameter type @p T to the actual 1496 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1497 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1498 QualType getAdjustedParameterType(QualType T); 1499 1500 /// \brief Retrieve the parameter type as adjusted for use in the signature 1501 /// of a function, decaying array and function types and removing top-level 1502 /// cv-qualifiers. 1503 QualType getSignatureParameterType(QualType T); 1504 1505 /// getArrayDecayedType - Return the properly qualified result of decaying the 1506 /// specified array type to a pointer. This operation is non-trivial when 1507 /// handling typedefs etc. The canonical type of "T" must be an array type, 1508 /// this returns a pointer to a properly qualified element of the array. 1509 /// 1510 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1511 QualType getArrayDecayedType(QualType T) const; 1512 1513 /// getPromotedIntegerType - Returns the type that Promotable will 1514 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1515 /// integer type. 1516 QualType getPromotedIntegerType(QualType PromotableType) const; 1517 1518 /// \brief Recurses in pointer/array types until it finds an objc retainable 1519 /// type and returns its ownership. 1520 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1521 1522 /// \brief Whether this is a promotable bitfield reference according 1523 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1524 /// 1525 /// \returns the type this bit-field will promote to, or NULL if no 1526 /// promotion occurs. 1527 QualType isPromotableBitField(Expr *E) const; 1528 1529 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1530 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1531 /// LHS < RHS, return -1. 1532 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1533 1534 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1535 /// point types, ignoring the domain of the type (i.e. 'double' == 1536 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1537 /// LHS < RHS, return -1. 1538 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1539 1540 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1541 /// point or a complex type (based on typeDomain/typeSize). 1542 /// 'typeDomain' is a real floating point or complex type. 1543 /// 'typeSize' is a real floating point or complex type. 1544 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1545 QualType typeDomain) const; 1546 1547 unsigned getTargetAddressSpace(QualType T) const { 1548 return getTargetAddressSpace(T.getQualifiers()); 1549 } 1550 1551 unsigned getTargetAddressSpace(Qualifiers Q) const { 1552 return getTargetAddressSpace(Q.getAddressSpace()); 1553 } 1554 1555 unsigned getTargetAddressSpace(unsigned AS) const { 1556 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1557 return AS; 1558 else 1559 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1560 } 1561 1562private: 1563 // Helper for integer ordering 1564 unsigned getIntegerRank(const Type *T) const; 1565 1566public: 1567 1568 //===--------------------------------------------------------------------===// 1569 // Type Compatibility Predicates 1570 //===--------------------------------------------------------------------===// 1571 1572 /// Compatibility predicates used to check assignment expressions. 1573 bool typesAreCompatible(QualType T1, QualType T2, 1574 bool CompareUnqualified = false); // C99 6.2.7p1 1575 1576 bool propertyTypesAreCompatible(QualType, QualType); 1577 bool typesAreBlockPointerCompatible(QualType, QualType); 1578 1579 bool isObjCIdType(QualType T) const { 1580 return T == getObjCIdType(); 1581 } 1582 bool isObjCClassType(QualType T) const { 1583 return T == getObjCClassType(); 1584 } 1585 bool isObjCSelType(QualType T) const { 1586 return T == getObjCSelType(); 1587 } 1588 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1589 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1590 bool ForCompare); 1591 1592 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1593 1594 // Check the safety of assignment from LHS to RHS 1595 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1596 const ObjCObjectPointerType *RHSOPT); 1597 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1598 const ObjCObjectType *RHS); 1599 bool canAssignObjCInterfacesInBlockPointer( 1600 const ObjCObjectPointerType *LHSOPT, 1601 const ObjCObjectPointerType *RHSOPT, 1602 bool BlockReturnType); 1603 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1604 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1605 const ObjCObjectPointerType *RHSOPT); 1606 bool canBindObjCObjectType(QualType To, QualType From); 1607 1608 // Functions for calculating composite types 1609 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1610 bool Unqualified = false, bool BlockReturnType = false); 1611 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1612 bool Unqualified = false); 1613 QualType mergeFunctionArgumentTypes(QualType, QualType, 1614 bool OfBlockPointer=false, 1615 bool Unqualified = false); 1616 QualType mergeTransparentUnionType(QualType, QualType, 1617 bool OfBlockPointer=false, 1618 bool Unqualified = false); 1619 1620 QualType mergeObjCGCQualifiers(QualType, QualType); 1621 1622 bool FunctionTypesMatchOnNSConsumedAttrs( 1623 const FunctionProtoType *FromFunctionType, 1624 const FunctionProtoType *ToFunctionType); 1625 1626 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1627 ObjCLayouts[CD] = 0; 1628 } 1629 1630 //===--------------------------------------------------------------------===// 1631 // Integer Predicates 1632 //===--------------------------------------------------------------------===// 1633 1634 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1635 // of bits in an integer type excluding any padding bits. 1636 unsigned getIntWidth(QualType T) const; 1637 1638 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1639 // unsigned integer type. This method takes a signed type, and returns the 1640 // corresponding unsigned integer type. 1641 QualType getCorrespondingUnsignedType(QualType T); 1642 1643 //===--------------------------------------------------------------------===// 1644 // Type Iterators. 1645 //===--------------------------------------------------------------------===// 1646 1647 typedef std::vector<Type*>::iterator type_iterator; 1648 typedef std::vector<Type*>::const_iterator const_type_iterator; 1649 1650 type_iterator types_begin() { return Types.begin(); } 1651 type_iterator types_end() { return Types.end(); } 1652 const_type_iterator types_begin() const { return Types.begin(); } 1653 const_type_iterator types_end() const { return Types.end(); } 1654 1655 //===--------------------------------------------------------------------===// 1656 // Integer Values 1657 //===--------------------------------------------------------------------===// 1658 1659 /// MakeIntValue - Make an APSInt of the appropriate width and 1660 /// signedness for the given \arg Value and integer \arg Type. 1661 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1662 llvm::APSInt Res(getIntWidth(Type), 1663 !Type->isSignedIntegerOrEnumerationType()); 1664 Res = Value; 1665 return Res; 1666 } 1667 1668 bool isSentinelNullExpr(const Expr *E); 1669 1670 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1671 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1672 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1673 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1674 1675 /// \brief returns true if there is at lease one @implementation in TU. 1676 bool AnyObjCImplementation() { 1677 return !ObjCImpls.empty(); 1678 } 1679 1680 /// \brief Set the implementation of ObjCInterfaceDecl. 1681 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1682 ObjCImplementationDecl *ImplD); 1683 /// \brief Set the implementation of ObjCCategoryDecl. 1684 void setObjCImplementation(ObjCCategoryDecl *CatD, 1685 ObjCCategoryImplDecl *ImplD); 1686 1687 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1688 /// interface, or null if non exists. 1689 const ObjCMethodDecl *getObjCMethodRedeclaration( 1690 const ObjCMethodDecl *MD) const { 1691 llvm::DenseMap<const ObjCMethodDecl*, const ObjCMethodDecl*>::const_iterator 1692 I = ObjCMethodRedecls.find(MD); 1693 if (I == ObjCMethodRedecls.end()) 1694 return 0; 1695 return I->second; 1696 } 1697 1698 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1699 const ObjCMethodDecl *Redecl) { 1700 ObjCMethodRedecls[MD] = Redecl; 1701 } 1702 1703 /// \brief Returns the objc interface that \arg ND belongs to if it is a 1704 /// objc method/property/ivar etc. that is part of an interface, 1705 /// otherwise returns null. 1706 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1707 1708 /// \brief Set the copy inialization expression of a block var decl. 1709 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1710 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1711 /// none exists. 1712 Expr *getBlockVarCopyInits(const VarDecl*VD); 1713 1714 /// \brief Allocate an uninitialized TypeSourceInfo. 1715 /// 1716 /// The caller should initialize the memory held by TypeSourceInfo using 1717 /// the TypeLoc wrappers. 1718 /// 1719 /// \param T the type that will be the basis for type source info. This type 1720 /// should refer to how the declarator was written in source code, not to 1721 /// what type semantic analysis resolved the declarator to. 1722 /// 1723 /// \param Size the size of the type info to create, or 0 if the size 1724 /// should be calculated based on the type. 1725 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1726 1727 /// \brief Allocate a TypeSourceInfo where all locations have been 1728 /// initialized to a given location, which defaults to the empty 1729 /// location. 1730 TypeSourceInfo * 1731 getTrivialTypeSourceInfo(QualType T, 1732 SourceLocation Loc = SourceLocation()) const; 1733 1734 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1735 1736 /// \brief Add a deallocation callback that will be invoked when the 1737 /// ASTContext is destroyed. 1738 /// 1739 /// \brief Callback A callback function that will be invoked on destruction. 1740 /// 1741 /// \brief Data Pointer data that will be provided to the callback function 1742 /// when it is called. 1743 void AddDeallocation(void (*Callback)(void*), void *Data); 1744 1745 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1746 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1747 1748 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1749 /// lazily, only when used; this is only relevant for function or file scoped 1750 /// var definitions. 1751 /// 1752 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1753 /// it is not used. 1754 bool DeclMustBeEmitted(const Decl *D); 1755 1756 1757 /// \brief Used by ParmVarDecl to store on the side the 1758 /// index of the parameter when it exceeds the size of the normal bitfield. 1759 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1760 1761 /// \brief Used by ParmVarDecl to retrieve on the side the 1762 /// index of the parameter when it exceeds the size of the normal bitfield. 1763 unsigned getParameterIndex(const ParmVarDecl *D) const; 1764 1765 //===--------------------------------------------------------------------===// 1766 // Statistics 1767 //===--------------------------------------------------------------------===// 1768 1769 /// \brief The number of implicitly-declared default constructors. 1770 static unsigned NumImplicitDefaultConstructors; 1771 1772 /// \brief The number of implicitly-declared default constructors for 1773 /// which declarations were built. 1774 static unsigned NumImplicitDefaultConstructorsDeclared; 1775 1776 /// \brief The number of implicitly-declared copy constructors. 1777 static unsigned NumImplicitCopyConstructors; 1778 1779 /// \brief The number of implicitly-declared copy constructors for 1780 /// which declarations were built. 1781 static unsigned NumImplicitCopyConstructorsDeclared; 1782 1783 /// \brief The number of implicitly-declared move constructors. 1784 static unsigned NumImplicitMoveConstructors; 1785 1786 /// \brief The number of implicitly-declared move constructors for 1787 /// which declarations were built. 1788 static unsigned NumImplicitMoveConstructorsDeclared; 1789 1790 /// \brief The number of implicitly-declared copy assignment operators. 1791 static unsigned NumImplicitCopyAssignmentOperators; 1792 1793 /// \brief The number of implicitly-declared copy assignment operators for 1794 /// which declarations were built. 1795 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1796 1797 /// \brief The number of implicitly-declared move assignment operators. 1798 static unsigned NumImplicitMoveAssignmentOperators; 1799 1800 /// \brief The number of implicitly-declared move assignment operators for 1801 /// which declarations were built. 1802 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1803 1804 /// \brief The number of implicitly-declared destructors. 1805 static unsigned NumImplicitDestructors; 1806 1807 /// \brief The number of implicitly-declared destructors for which 1808 /// declarations were built. 1809 static unsigned NumImplicitDestructorsDeclared; 1810 1811private: 1812 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1813 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1814 1815public: 1816 /// \brief Initialize built-in types. 1817 /// 1818 /// This routine may only be invoked once for a given ASTContext object. 1819 /// It is normally invoked by the ASTContext constructor. However, the 1820 /// constructor can be asked to delay initialization, which places the burden 1821 /// of calling this function on the user of that object. 1822 /// 1823 /// \param Target The target 1824 void InitBuiltinTypes(const TargetInfo &Target); 1825 1826private: 1827 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1828 1829 // Return the ObjC type encoding for a given type. 1830 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1831 bool ExpandPointedToStructures, 1832 bool ExpandStructures, 1833 const FieldDecl *Field, 1834 bool OutermostType = false, 1835 bool EncodingProperty = false, 1836 bool StructField = false, 1837 bool EncodeBlockParameters = false, 1838 bool EncodeClassNames = false) const; 1839 1840 // Adds the encoding of the structure's members. 1841 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1842 const FieldDecl *Field, 1843 bool includeVBases = true) const; 1844 1845 // Adds the encoding of a method parameter or return type. 1846 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 1847 QualType T, std::string& S, 1848 bool Extended) const; 1849 1850 const ASTRecordLayout & 1851 getObjCLayout(const ObjCInterfaceDecl *D, 1852 const ObjCImplementationDecl *Impl) const; 1853 1854private: 1855 /// \brief A set of deallocations that should be performed when the 1856 /// ASTContext is destroyed. 1857 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1858 1859 // FIXME: This currently contains the set of StoredDeclMaps used 1860 // by DeclContext objects. This probably should not be in ASTContext, 1861 // but we include it here so that ASTContext can quickly deallocate them. 1862 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1863 1864 /// \brief A counter used to uniquely identify "blocks". 1865 mutable unsigned int UniqueBlockByRefTypeID; 1866 1867 friend class DeclContext; 1868 friend class DeclarationNameTable; 1869 void ReleaseDeclContextMaps(); 1870}; 1871 1872/// @brief Utility function for constructing a nullary selector. 1873static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 1874 IdentifierInfo* II = &Ctx.Idents.get(name); 1875 return Ctx.Selectors.getSelector(0, &II); 1876} 1877 1878/// @brief Utility function for constructing an unary selector. 1879static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 1880 IdentifierInfo* II = &Ctx.Idents.get(name); 1881 return Ctx.Selectors.getSelector(1, &II); 1882} 1883 1884} // end namespace clang 1885 1886// operator new and delete aren't allowed inside namespaces. 1887// The throw specifications are mandated by the standard. 1888/// @brief Placement new for using the ASTContext's allocator. 1889/// 1890/// This placement form of operator new uses the ASTContext's allocator for 1891/// obtaining memory. It is a non-throwing new, which means that it returns 1892/// null on error. (If that is what the allocator does. The current does, so if 1893/// this ever changes, this operator will have to be changed, too.) 1894/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1895/// @code 1896/// // Default alignment (8) 1897/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1898/// // Specific alignment 1899/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1900/// @endcode 1901/// Please note that you cannot use delete on the pointer; it must be 1902/// deallocated using an explicit destructor call followed by 1903/// @c Context.Deallocate(Ptr). 1904/// 1905/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1906/// @param C The ASTContext that provides the allocator. 1907/// @param Alignment The alignment of the allocated memory (if the underlying 1908/// allocator supports it). 1909/// @return The allocated memory. Could be NULL. 1910inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1911 size_t Alignment) throw () { 1912 return C.Allocate(Bytes, Alignment); 1913} 1914/// @brief Placement delete companion to the new above. 1915/// 1916/// This operator is just a companion to the new above. There is no way of 1917/// invoking it directly; see the new operator for more details. This operator 1918/// is called implicitly by the compiler if a placement new expression using 1919/// the ASTContext throws in the object constructor. 1920inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1921 throw () { 1922 C.Deallocate(Ptr); 1923} 1924 1925/// This placement form of operator new[] uses the ASTContext's allocator for 1926/// obtaining memory. It is a non-throwing new[], which means that it returns 1927/// null on error. 1928/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1929/// @code 1930/// // Default alignment (8) 1931/// char *data = new (Context) char[10]; 1932/// // Specific alignment 1933/// char *data = new (Context, 4) char[10]; 1934/// @endcode 1935/// Please note that you cannot use delete on the pointer; it must be 1936/// deallocated using an explicit destructor call followed by 1937/// @c Context.Deallocate(Ptr). 1938/// 1939/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1940/// @param C The ASTContext that provides the allocator. 1941/// @param Alignment The alignment of the allocated memory (if the underlying 1942/// allocator supports it). 1943/// @return The allocated memory. Could be NULL. 1944inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1945 size_t Alignment = 8) throw () { 1946 return C.Allocate(Bytes, Alignment); 1947} 1948 1949/// @brief Placement delete[] companion to the new[] above. 1950/// 1951/// This operator is just a companion to the new[] above. There is no way of 1952/// invoking it directly; see the new[] operator for more details. This operator 1953/// is called implicitly by the compiler if a placement new[] expression using 1954/// the ASTContext throws in the object constructor. 1955inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1956 throw () { 1957 C.Deallocate(Ptr); 1958} 1959 1960#endif 1961