ASTContext.h revision f8af98286022f72157d84951b48fde5fb369ab29
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 SelectorTable; 53 class SourceManager; 54 class TargetInfo; 55 class CXXABI; 56 // Decls 57 class DeclContext; 58 class CXXMethodDecl; 59 class CXXRecordDecl; 60 class Decl; 61 class FieldDecl; 62 class LambdaExpr; 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 Mapping from closure types to the lambda expressions that 168 /// create instances of them. 169 llvm::DenseMap<const CXXRecordDecl *, LambdaExpr *> Lambdas; 170 171 /// \brief Representation of a "canonical" template template parameter that 172 /// is used in canonical template names. 173 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 174 TemplateTemplateParmDecl *Parm; 175 176 public: 177 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 178 : Parm(Parm) { } 179 180 TemplateTemplateParmDecl *getParam() const { return Parm; } 181 182 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 183 184 static void Profile(llvm::FoldingSetNodeID &ID, 185 TemplateTemplateParmDecl *Parm); 186 }; 187 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 188 CanonTemplateTemplateParms; 189 190 TemplateTemplateParmDecl * 191 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 192 193 /// \brief The typedef for the __int128_t type. 194 mutable TypedefDecl *Int128Decl; 195 196 /// \brief The typedef for the __uint128_t type. 197 mutable TypedefDecl *UInt128Decl; 198 199 /// BuiltinVaListType - built-in va list type. 200 /// This is initially null and set by Sema::LazilyCreateBuiltin when 201 /// a builtin that takes a valist is encountered. 202 QualType BuiltinVaListType; 203 204 /// \brief The typedef for the predefined 'id' type. 205 mutable TypedefDecl *ObjCIdDecl; 206 207 /// \brief The typedef for the predefined 'SEL' type. 208 mutable TypedefDecl *ObjCSelDecl; 209 210 /// \brief The typedef for the predefined 'Class' type. 211 mutable TypedefDecl *ObjCClassDecl; 212 213 /// \brief The typedef for the predefined 'Protocol' class in Objective-C. 214 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 215 216 // Typedefs which may be provided defining the structure of Objective-C 217 // pseudo-builtins 218 QualType ObjCIdRedefinitionType; 219 QualType ObjCClassRedefinitionType; 220 QualType ObjCSelRedefinitionType; 221 222 QualType ObjCConstantStringType; 223 mutable RecordDecl *CFConstantStringTypeDecl; 224 225 /// \brief The typedef declaration for the Objective-C "instancetype" type. 226 TypedefDecl *ObjCInstanceTypeDecl; 227 228 /// \brief The type for the C FILE type. 229 TypeDecl *FILEDecl; 230 231 /// \brief The type for the C jmp_buf type. 232 TypeDecl *jmp_bufDecl; 233 234 /// \brief The type for the C sigjmp_buf type. 235 TypeDecl *sigjmp_bufDecl; 236 237 /// \brief The type for the C ucontext_t type. 238 TypeDecl *ucontext_tDecl; 239 240 /// \brief Type for the Block descriptor for Blocks CodeGen. 241 /// 242 /// Since this is only used for generation of debug info, it is not 243 /// serialized. 244 mutable RecordDecl *BlockDescriptorType; 245 246 /// \brief Type for the Block descriptor for Blocks CodeGen. 247 /// 248 /// Since this is only used for generation of debug info, it is not 249 /// serialized. 250 mutable RecordDecl *BlockDescriptorExtendedType; 251 252 /// \brief Declaration for the CUDA cudaConfigureCall function. 253 FunctionDecl *cudaConfigureCallDecl; 254 255 TypeSourceInfo NullTypeSourceInfo; 256 257 /// \brief Keeps track of all declaration attributes. 258 /// 259 /// Since so few decls have attrs, we keep them in a hash map instead of 260 /// wasting space in the Decl class. 261 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 262 263 /// \brief Keeps track of the static data member templates from which 264 /// static data members of class template specializations were instantiated. 265 /// 266 /// This data structure stores the mapping from instantiations of static 267 /// data members to the static data member representations within the 268 /// class template from which they were instantiated along with the kind 269 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 270 /// 271 /// Given the following example: 272 /// 273 /// \code 274 /// template<typename T> 275 /// struct X { 276 /// static T value; 277 /// }; 278 /// 279 /// template<typename T> 280 /// T X<T>::value = T(17); 281 /// 282 /// int *x = &X<int>::value; 283 /// \endcode 284 /// 285 /// This mapping will contain an entry that maps from the VarDecl for 286 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 287 /// class template X) and will be marked TSK_ImplicitInstantiation. 288 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 289 InstantiatedFromStaticDataMember; 290 291 /// \brief Keeps track of the declaration from which a UsingDecl was 292 /// created during instantiation. The source declaration is always 293 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 294 /// UnresolvedUsingTypenameDecl. 295 /// 296 /// For example: 297 /// \code 298 /// template<typename T> 299 /// struct A { 300 /// void f(); 301 /// }; 302 /// 303 /// template<typename T> 304 /// struct B : A<T> { 305 /// using A<T>::f; 306 /// }; 307 /// 308 /// template struct B<int>; 309 /// \endcode 310 /// 311 /// This mapping will contain an entry that maps from the UsingDecl in 312 /// B<int> to the UnresolvedUsingDecl in B<T>. 313 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 314 315 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 316 InstantiatedFromUsingShadowDecl; 317 318 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 319 320 /// \brief Mapping that stores the methods overridden by a given C++ 321 /// member function. 322 /// 323 /// Since most C++ member functions aren't virtual and therefore 324 /// don't override anything, we store the overridden functions in 325 /// this map on the side rather than within the CXXMethodDecl structure. 326 typedef UsuallyTinyPtrVector<const CXXMethodDecl> CXXMethodVector; 327 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 328 329 /// \brief Mapping that stores parameterIndex values for ParmVarDecls 330 /// when that value exceeds the bitfield size of 331 /// ParmVarDeclBits.ParameterIndex. 332 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 333 ParameterIndexTable ParamIndices; 334 335 ImportDecl *FirstLocalImport; 336 ImportDecl *LastLocalImport; 337 338 TranslationUnitDecl *TUDecl; 339 340 /// SourceMgr - The associated SourceManager object. 341 SourceManager &SourceMgr; 342 343 /// LangOpts - The language options used to create the AST associated with 344 /// this ASTContext object. 345 LangOptions &LangOpts; 346 347 /// \brief The allocator used to create AST objects. 348 /// 349 /// AST objects are never destructed; rather, all memory associated with the 350 /// AST objects will be released when the ASTContext itself is destroyed. 351 mutable llvm::BumpPtrAllocator BumpAlloc; 352 353 /// \brief Allocator for partial diagnostics. 354 PartialDiagnostic::StorageAllocator DiagAllocator; 355 356 /// \brief The current C++ ABI. 357 OwningPtr<CXXABI> ABI; 358 CXXABI *createCXXABI(const TargetInfo &T); 359 360 /// \brief The logical -> physical address space map. 361 const LangAS::Map *AddrSpaceMap; 362 363 friend class ASTDeclReader; 364 friend class ASTReader; 365 friend class ASTWriter; 366 friend class CXXRecordDecl; 367 368 const TargetInfo *Target; 369 clang::PrintingPolicy PrintingPolicy; 370 371public: 372 IdentifierTable &Idents; 373 SelectorTable &Selectors; 374 Builtin::Context &BuiltinInfo; 375 mutable DeclarationNameTable DeclarationNames; 376 OwningPtr<ExternalASTSource> ExternalSource; 377 ASTMutationListener *Listener; 378 379 clang::PrintingPolicy getPrintingPolicy() const { return PrintingPolicy; } 380 381 void setPrintingPolicy(clang::PrintingPolicy Policy) { 382 PrintingPolicy = Policy; 383 } 384 385 SourceManager& getSourceManager() { return SourceMgr; } 386 const SourceManager& getSourceManager() const { return SourceMgr; } 387 void *Allocate(unsigned Size, unsigned Align = 8) const { 388 return BumpAlloc.Allocate(Size, Align); 389 } 390 void Deallocate(void *Ptr) const { } 391 392 /// Return the total amount of physical memory allocated for representing 393 /// AST nodes and type information. 394 size_t getASTAllocatedMemory() const { 395 return BumpAlloc.getTotalMemory(); 396 } 397 /// Return the total memory used for various side tables. 398 size_t getSideTableAllocatedMemory() const; 399 400 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 401 return DiagAllocator; 402 } 403 404 const TargetInfo &getTargetInfo() const { return *Target; } 405 406 const LangOptions& getLangOptions() const { return LangOpts; } 407 408 DiagnosticsEngine &getDiagnostics() const; 409 410 FullSourceLoc getFullLoc(SourceLocation Loc) const { 411 return FullSourceLoc(Loc,SourceMgr); 412 } 413 414 /// \brief Retrieve the attributes for the given declaration. 415 AttrVec& getDeclAttrs(const Decl *D); 416 417 /// \brief Erase the attributes corresponding to the given declaration. 418 void eraseDeclAttrs(const Decl *D); 419 420 /// \brief If this variable is an instantiated static data member of a 421 /// class template specialization, returns the templated static data member 422 /// from which it was instantiated. 423 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 424 const VarDecl *Var); 425 426 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 427 428 void setClassScopeSpecializationPattern(FunctionDecl *FD, 429 FunctionDecl *Pattern); 430 431 /// \brief Note that the static data member \p Inst is an instantiation of 432 /// the static data member template \p Tmpl of a class template. 433 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 434 TemplateSpecializationKind TSK, 435 SourceLocation PointOfInstantiation = SourceLocation()); 436 437 /// \brief If the given using decl is an instantiation of a 438 /// (possibly unresolved) using decl from a template instantiation, 439 /// return it. 440 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 441 442 /// \brief Remember that the using decl \p Inst is an instantiation 443 /// of the using decl \p Pattern of a class template. 444 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 445 446 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 447 UsingShadowDecl *Pattern); 448 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 449 450 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 451 452 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 453 454 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 455 /// bitfield which follows the non-bitfield 'LastFD'. 456 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 457 const FieldDecl *LastFD) const; 458 459 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 460 /// bitfield which follows the bitfield 'LastFD'. 461 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 462 const FieldDecl *LastFD) const; 463 464 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 465 /// bitfield which follows the bitfield 'LastFD'. 466 bool BitfieldFollowsBitfield(const FieldDecl *FD, 467 const FieldDecl *LastFD) const; 468 469 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 470 /// bitfield which follows the bitfield 'LastFD'. 471 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 472 const FieldDecl *LastFD) const; 473 474 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 475 /// bitfield which follows the none bitfield 'LastFD'. 476 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 477 const FieldDecl *LastFD) const; 478 479 // Access to the set of methods overridden by the given C++ method. 480 typedef CXXMethodVector::iterator overridden_cxx_method_iterator; 481 overridden_cxx_method_iterator 482 overridden_methods_begin(const CXXMethodDecl *Method) const; 483 484 overridden_cxx_method_iterator 485 overridden_methods_end(const CXXMethodDecl *Method) const; 486 487 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 488 489 /// \brief Note that the given C++ \p Method overrides the given \p 490 /// Overridden method. 491 void addOverriddenMethod(const CXXMethodDecl *Method, 492 const CXXMethodDecl *Overridden); 493 494 /// \brief Notify the AST context that a new import declaration has been 495 /// parsed or implicitly created within this translation unit. 496 void addedLocalImportDecl(ImportDecl *Import); 497 498 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 499 return Import->NextLocalImport; 500 } 501 502 /// \brief Iterator that visits import declarations. 503 class import_iterator { 504 ImportDecl *Import; 505 506 public: 507 typedef ImportDecl *value_type; 508 typedef ImportDecl *reference; 509 typedef ImportDecl *pointer; 510 typedef int difference_type; 511 typedef std::forward_iterator_tag iterator_category; 512 513 import_iterator() : Import() { } 514 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 515 516 reference operator*() const { return Import; } 517 pointer operator->() const { return Import; } 518 519 import_iterator &operator++() { 520 Import = ASTContext::getNextLocalImport(Import); 521 return *this; 522 } 523 524 import_iterator operator++(int) { 525 import_iterator Other(*this); 526 ++(*this); 527 return Other; 528 } 529 530 friend bool operator==(import_iterator X, import_iterator Y) { 531 return X.Import == Y.Import; 532 } 533 534 friend bool operator!=(import_iterator X, import_iterator Y) { 535 return X.Import != Y.Import; 536 } 537 }; 538 539 import_iterator local_import_begin() const { 540 return import_iterator(FirstLocalImport); 541 } 542 import_iterator local_import_end() const { return import_iterator(); } 543 544 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 545 546 547 // Builtin Types. 548 CanQualType VoidTy; 549 CanQualType BoolTy; 550 CanQualType CharTy; 551 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 552 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 553 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 554 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 555 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 556 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 557 CanQualType FloatTy, DoubleTy, LongDoubleTy; 558 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 559 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 560 CanQualType VoidPtrTy, NullPtrTy; 561 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 562 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 563 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 564 565 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 566 mutable QualType AutoDeductTy; // Deduction against 'auto'. 567 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 568 569 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 570 IdentifierTable &idents, SelectorTable &sels, 571 Builtin::Context &builtins, 572 unsigned size_reserve, 573 bool DelayInitialization = false); 574 575 ~ASTContext(); 576 577 /// \brief Attach an external AST source to the AST context. 578 /// 579 /// The external AST source provides the ability to load parts of 580 /// the abstract syntax tree as needed from some external storage, 581 /// e.g., a precompiled header. 582 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 583 584 /// \brief Retrieve a pointer to the external AST source associated 585 /// with this AST context, if any. 586 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 587 588 /// \brief Attach an AST mutation listener to the AST context. 589 /// 590 /// The AST mutation listener provides the ability to track modifications to 591 /// the abstract syntax tree entities committed after they were initially 592 /// created. 593 void setASTMutationListener(ASTMutationListener *Listener) { 594 this->Listener = Listener; 595 } 596 597 /// \brief Retrieve a pointer to the AST mutation listener associated 598 /// with this AST context, if any. 599 ASTMutationListener *getASTMutationListener() const { return Listener; } 600 601 void PrintStats() const; 602 const std::vector<Type*>& getTypes() const { return Types; } 603 604 /// \brief Retrieve the declaration for the 128-bit signed integer type. 605 TypedefDecl *getInt128Decl() const; 606 607 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 608 TypedefDecl *getUInt128Decl() const; 609 610 //===--------------------------------------------------------------------===// 611 // Type Constructors 612 //===--------------------------------------------------------------------===// 613 614private: 615 /// getExtQualType - Return a type with extended qualifiers. 616 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 617 618 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 619 620public: 621 /// getAddSpaceQualType - Return the uniqued reference to the type for an 622 /// address space qualified type with the specified type and address space. 623 /// The resulting type has a union of the qualifiers from T and the address 624 /// space. If T already has an address space specifier, it is silently 625 /// replaced. 626 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 627 628 /// getObjCGCQualType - Returns the uniqued reference to the type for an 629 /// objc gc qualified type. The retulting type has a union of the qualifiers 630 /// from T and the gc attribute. 631 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 632 633 /// getRestrictType - Returns the uniqued reference to the type for a 634 /// 'restrict' qualified type. The resulting type has a union of the 635 /// qualifiers from T and 'restrict'. 636 QualType getRestrictType(QualType T) const { 637 return T.withFastQualifiers(Qualifiers::Restrict); 638 } 639 640 /// getVolatileType - Returns the uniqued reference to the type for a 641 /// 'volatile' qualified type. The resulting type has a union of the 642 /// qualifiers from T and 'volatile'. 643 QualType getVolatileType(QualType T) const { 644 return T.withFastQualifiers(Qualifiers::Volatile); 645 } 646 647 /// getConstType - Returns the uniqued reference to the type for a 648 /// 'const' qualified type. The resulting type has a union of the 649 /// qualifiers from T and 'const'. 650 /// 651 /// It can be reasonably expected that this will always be 652 /// equivalent to calling T.withConst(). 653 QualType getConstType(QualType T) const { return T.withConst(); } 654 655 /// adjustFunctionType - Change the ExtInfo on a function type. 656 const FunctionType *adjustFunctionType(const FunctionType *Fn, 657 FunctionType::ExtInfo EInfo); 658 659 /// getComplexType - Return the uniqued reference to the type for a complex 660 /// number with the specified element type. 661 QualType getComplexType(QualType T) const; 662 CanQualType getComplexType(CanQualType T) const { 663 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 664 } 665 666 /// getPointerType - Return the uniqued reference to the type for a pointer to 667 /// the specified type. 668 QualType getPointerType(QualType T) const; 669 CanQualType getPointerType(CanQualType T) const { 670 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 671 } 672 673 /// getAtomicType - Return the uniqued reference to the atomic type for 674 /// the specified type. 675 QualType getAtomicType(QualType T) const; 676 677 /// getBlockPointerType - Return the uniqued reference to the type for a block 678 /// of the specified type. 679 QualType getBlockPointerType(QualType T) const; 680 681 /// This gets the struct used to keep track of the descriptor for pointer to 682 /// blocks. 683 QualType getBlockDescriptorType() const; 684 685 /// This gets the struct used to keep track of the extended descriptor for 686 /// pointer to blocks. 687 QualType getBlockDescriptorExtendedType() const; 688 689 void setcudaConfigureCallDecl(FunctionDecl *FD) { 690 cudaConfigureCallDecl = FD; 691 } 692 FunctionDecl *getcudaConfigureCallDecl() { 693 return cudaConfigureCallDecl; 694 } 695 696 /// This builds the struct used for __block variables. 697 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 698 699 /// Returns true iff we need copy/dispose helpers for the given type. 700 bool BlockRequiresCopying(QualType Ty) const; 701 702 /// getLValueReferenceType - Return the uniqued reference to the type for an 703 /// lvalue reference to the specified type. 704 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 705 const; 706 707 /// getRValueReferenceType - Return the uniqued reference to the type for an 708 /// rvalue reference to the specified type. 709 QualType getRValueReferenceType(QualType T) const; 710 711 /// getMemberPointerType - Return the uniqued reference to the type for a 712 /// member pointer to the specified type in the specified class. The class 713 /// is a Type because it could be a dependent name. 714 QualType getMemberPointerType(QualType T, const Type *Cls) const; 715 716 /// getVariableArrayType - Returns a non-unique reference to the type for a 717 /// variable array of the specified element type. 718 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 719 ArrayType::ArraySizeModifier ASM, 720 unsigned IndexTypeQuals, 721 SourceRange Brackets) const; 722 723 /// getDependentSizedArrayType - Returns a non-unique reference to 724 /// the type for a dependently-sized array of the specified element 725 /// type. FIXME: We will need these to be uniqued, or at least 726 /// comparable, at some point. 727 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 728 ArrayType::ArraySizeModifier ASM, 729 unsigned IndexTypeQuals, 730 SourceRange Brackets) const; 731 732 /// getIncompleteArrayType - Returns a unique reference to the type for a 733 /// incomplete array of the specified element type. 734 QualType getIncompleteArrayType(QualType EltTy, 735 ArrayType::ArraySizeModifier ASM, 736 unsigned IndexTypeQuals) const; 737 738 /// getConstantArrayType - Return the unique reference to the type for a 739 /// constant array of the specified element type. 740 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 741 ArrayType::ArraySizeModifier ASM, 742 unsigned IndexTypeQuals) const; 743 744 /// getVariableArrayDecayedType - Returns a vla type where known sizes 745 /// are replaced with [*]. 746 QualType getVariableArrayDecayedType(QualType Ty) const; 747 748 /// getVectorType - Return the unique reference to a vector type of 749 /// the specified element type and size. VectorType must be a built-in type. 750 QualType getVectorType(QualType VectorType, unsigned NumElts, 751 VectorType::VectorKind VecKind) const; 752 753 /// getExtVectorType - Return the unique reference to an extended vector type 754 /// of the specified element type and size. VectorType must be a built-in 755 /// type. 756 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 757 758 /// getDependentSizedExtVectorType - Returns a non-unique reference to 759 /// the type for a dependently-sized vector of the specified element 760 /// type. FIXME: We will need these to be uniqued, or at least 761 /// comparable, at some point. 762 QualType getDependentSizedExtVectorType(QualType VectorType, 763 Expr *SizeExpr, 764 SourceLocation AttrLoc) const; 765 766 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 767 /// 768 QualType getFunctionNoProtoType(QualType ResultTy, 769 const FunctionType::ExtInfo &Info) const; 770 771 QualType getFunctionNoProtoType(QualType ResultTy) const { 772 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 773 } 774 775 /// getFunctionType - Return a normal function type with a typed 776 /// argument list. 777 QualType getFunctionType(QualType ResultTy, 778 const QualType *Args, unsigned NumArgs, 779 const FunctionProtoType::ExtProtoInfo &EPI) const; 780 781 /// getTypeDeclType - Return the unique reference to the type for 782 /// the specified type declaration. 783 QualType getTypeDeclType(const TypeDecl *Decl, 784 const TypeDecl *PrevDecl = 0) const { 785 assert(Decl && "Passed null for Decl param"); 786 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 787 788 if (PrevDecl) { 789 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 790 Decl->TypeForDecl = PrevDecl->TypeForDecl; 791 return QualType(PrevDecl->TypeForDecl, 0); 792 } 793 794 return getTypeDeclTypeSlow(Decl); 795 } 796 797 /// getTypedefType - Return the unique reference to the type for the 798 /// specified typedef-name decl. 799 QualType getTypedefType(const TypedefNameDecl *Decl, 800 QualType Canon = QualType()) const; 801 802 QualType getRecordType(const RecordDecl *Decl) const; 803 804 QualType getEnumType(const EnumDecl *Decl) const; 805 806 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 807 808 QualType getAttributedType(AttributedType::Kind attrKind, 809 QualType modifiedType, 810 QualType equivalentType); 811 812 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 813 QualType Replacement) const; 814 QualType getSubstTemplateTypeParmPackType( 815 const TemplateTypeParmType *Replaced, 816 const TemplateArgument &ArgPack); 817 818 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 819 bool ParameterPack, 820 TemplateTypeParmDecl *ParmDecl = 0) const; 821 822 QualType getTemplateSpecializationType(TemplateName T, 823 const TemplateArgument *Args, 824 unsigned NumArgs, 825 QualType Canon = QualType()) const; 826 827 QualType getCanonicalTemplateSpecializationType(TemplateName T, 828 const TemplateArgument *Args, 829 unsigned NumArgs) const; 830 831 QualType getTemplateSpecializationType(TemplateName T, 832 const TemplateArgumentListInfo &Args, 833 QualType Canon = QualType()) const; 834 835 TypeSourceInfo * 836 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 837 const TemplateArgumentListInfo &Args, 838 QualType Canon = QualType()) const; 839 840 QualType getParenType(QualType NamedType) const; 841 842 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 843 NestedNameSpecifier *NNS, 844 QualType NamedType) const; 845 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 846 NestedNameSpecifier *NNS, 847 const IdentifierInfo *Name, 848 QualType Canon = QualType()) const; 849 850 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 851 NestedNameSpecifier *NNS, 852 const IdentifierInfo *Name, 853 const TemplateArgumentListInfo &Args) const; 854 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 855 NestedNameSpecifier *NNS, 856 const IdentifierInfo *Name, 857 unsigned NumArgs, 858 const TemplateArgument *Args) const; 859 860 QualType getPackExpansionType(QualType Pattern, 861 llvm::Optional<unsigned> NumExpansions); 862 863 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 864 ObjCInterfaceDecl *PrevDecl = 0) const; 865 866 QualType getObjCObjectType(QualType Base, 867 ObjCProtocolDecl * const *Protocols, 868 unsigned NumProtocols) const; 869 870 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 871 /// for the given ObjCObjectType. 872 QualType getObjCObjectPointerType(QualType OIT) const; 873 874 /// getTypeOfType - GCC extension. 875 QualType getTypeOfExprType(Expr *e) const; 876 QualType getTypeOfType(QualType t) const; 877 878 /// getDecltypeType - C++0x decltype. 879 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 880 881 /// getUnaryTransformType - unary type transforms 882 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 883 UnaryTransformType::UTTKind UKind) const; 884 885 /// getAutoType - C++0x deduced auto type. 886 QualType getAutoType(QualType DeducedType) const; 887 888 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 889 QualType getAutoDeductType() const; 890 891 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 892 QualType getAutoRRefDeductType() const; 893 894 /// getTagDeclType - Return the unique reference to the type for the 895 /// specified TagDecl (struct/union/class/enum) decl. 896 QualType getTagDeclType(const TagDecl *Decl) const; 897 898 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 899 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 900 CanQualType getSizeType() const; 901 902 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5), 903 /// defined in <stdint.h>. 904 CanQualType getIntMaxType() const; 905 906 /// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5), 907 /// defined in <stdint.h>. 908 CanQualType getUIntMaxType() const; 909 910 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 911 /// returns a type compatible with the type defined in <stddef.h> as defined 912 /// by the target. 913 QualType getWCharType() const { return WCharTy; } 914 915 /// getSignedWCharType - Return the type of "signed wchar_t". 916 /// Used when in C++, as a GCC extension. 917 QualType getSignedWCharType() const; 918 919 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 920 /// Used when in C++, as a GCC extension. 921 QualType getUnsignedWCharType() const; 922 923 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 924 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 925 QualType getPointerDiffType() const; 926 927 // getCFConstantStringType - Return the C structure type used to represent 928 // constant CFStrings. 929 QualType getCFConstantStringType() const; 930 931 /// Get the structure type used to representation CFStrings, or NULL 932 /// if it hasn't yet been built. 933 QualType getRawCFConstantStringType() const { 934 if (CFConstantStringTypeDecl) 935 return getTagDeclType(CFConstantStringTypeDecl); 936 return QualType(); 937 } 938 void setCFConstantStringType(QualType T); 939 940 // This setter/getter represents the ObjC type for an NSConstantString. 941 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 942 QualType getObjCConstantStringInterface() const { 943 return ObjCConstantStringType; 944 } 945 946 /// \brief Retrieve the type that 'id' has been defined to, which may be 947 /// different from the built-in 'id' if 'id' has been typedef'd. 948 QualType getObjCIdRedefinitionType() const { 949 if (ObjCIdRedefinitionType.isNull()) 950 return getObjCIdType(); 951 return ObjCIdRedefinitionType; 952 } 953 954 /// \brief Set the user-written type that redefines 'id'. 955 void setObjCIdRedefinitionType(QualType RedefType) { 956 ObjCIdRedefinitionType = RedefType; 957 } 958 959 /// \brief Retrieve the type that 'Class' has been defined to, which may be 960 /// different from the built-in 'Class' if 'Class' has been typedef'd. 961 QualType getObjCClassRedefinitionType() const { 962 if (ObjCClassRedefinitionType.isNull()) 963 return getObjCClassType(); 964 return ObjCClassRedefinitionType; 965 } 966 967 /// \brief Set the user-written type that redefines 'SEL'. 968 void setObjCClassRedefinitionType(QualType RedefType) { 969 ObjCClassRedefinitionType = RedefType; 970 } 971 972 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 973 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 974 QualType getObjCSelRedefinitionType() const { 975 if (ObjCSelRedefinitionType.isNull()) 976 return getObjCSelType(); 977 return ObjCSelRedefinitionType; 978 } 979 980 981 /// \brief Set the user-written type that redefines 'SEL'. 982 void setObjCSelRedefinitionType(QualType RedefType) { 983 ObjCSelRedefinitionType = RedefType; 984 } 985 986 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 987 /// otherwise, returns a NULL type; 988 QualType getObjCInstanceType() { 989 return getTypeDeclType(getObjCInstanceTypeDecl()); 990 } 991 992 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 993 /// "instancetype" type. 994 TypedefDecl *getObjCInstanceTypeDecl(); 995 996 /// \brief Set the type for the C FILE type. 997 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 998 999 /// \brief Retrieve the C FILE type. 1000 QualType getFILEType() const { 1001 if (FILEDecl) 1002 return getTypeDeclType(FILEDecl); 1003 return QualType(); 1004 } 1005 1006 /// \brief Set the type for the C jmp_buf type. 1007 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1008 this->jmp_bufDecl = jmp_bufDecl; 1009 } 1010 1011 /// \brief Retrieve the C jmp_buf type. 1012 QualType getjmp_bufType() const { 1013 if (jmp_bufDecl) 1014 return getTypeDeclType(jmp_bufDecl); 1015 return QualType(); 1016 } 1017 1018 /// \brief Set the type for the C sigjmp_buf type. 1019 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1020 this->sigjmp_bufDecl = sigjmp_bufDecl; 1021 } 1022 1023 /// \brief Retrieve the C sigjmp_buf type. 1024 QualType getsigjmp_bufType() const { 1025 if (sigjmp_bufDecl) 1026 return getTypeDeclType(sigjmp_bufDecl); 1027 return QualType(); 1028 } 1029 1030 /// \brief Set the type for the C ucontext_t type. 1031 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1032 this->ucontext_tDecl = ucontext_tDecl; 1033 } 1034 1035 /// \brief Retrieve the C ucontext_t type. 1036 QualType getucontext_tType() const { 1037 if (ucontext_tDecl) 1038 return getTypeDeclType(ucontext_tDecl); 1039 return QualType(); 1040 } 1041 1042 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1043 QualType getLogicalOperationType() const { 1044 return getLangOptions().CPlusPlus ? BoolTy : IntTy; 1045 } 1046 1047 /// getObjCEncodingForType - Emit the ObjC type encoding for the 1048 /// given type into \arg S. If \arg NameFields is specified then 1049 /// record field names are also encoded. 1050 void getObjCEncodingForType(QualType t, std::string &S, 1051 const FieldDecl *Field=0) const; 1052 1053 void getLegacyIntegralTypeEncoding(QualType &t) const; 1054 1055 // Put the string version of type qualifiers into S. 1056 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1057 std::string &S) const; 1058 1059 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 1060 /// function. This is in the same format as Objective-C method encodings. 1061 /// 1062 /// \returns true if an error occurred (e.g., because one of the parameter 1063 /// types is incomplete), false otherwise. 1064 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1065 1066 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 1067 /// declaration. 1068 /// 1069 /// \returns true if an error occurred (e.g., because one of the parameter 1070 /// types is incomplete), false otherwise. 1071 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1072 bool Extended = false) 1073 const; 1074 1075 /// getObjCEncodingForBlock - Return the encoded type for this block 1076 /// declaration. 1077 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1078 1079 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1080 /// this method declaration. If non-NULL, Container must be either 1081 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1082 /// only be NULL when getting encodings for protocol properties. 1083 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1084 const Decl *Container, 1085 std::string &S) const; 1086 1087 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1088 ObjCProtocolDecl *rProto) const; 1089 1090 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 1091 /// purpose in characters. 1092 CharUnits getObjCEncodingTypeSize(QualType t) const; 1093 1094 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 1095 /// in Objective-C. 1096 TypedefDecl *getObjCIdDecl() const; 1097 1098 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 1099 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 1100 QualType getObjCIdType() const { 1101 return getTypeDeclType(getObjCIdDecl()); 1102 } 1103 1104 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1105 /// in Objective-C. 1106 TypedefDecl *getObjCSelDecl() const; 1107 1108 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1109 /// 'SEL' type. 1110 QualType getObjCSelType() const { 1111 return getTypeDeclType(getObjCSelDecl()); 1112 } 1113 1114 /// \brief Retrieve the typedef declaration corresponding to the predefined 1115 /// Objective-C 'Class' type. 1116 TypedefDecl *getObjCClassDecl() const; 1117 1118 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1119 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1120 /// struct. 1121 QualType getObjCClassType() const { 1122 return getTypeDeclType(getObjCClassDecl()); 1123 } 1124 1125 /// \brief Retrieve the Objective-C class declaration corresponding to 1126 /// the predefined 'Protocol' class. 1127 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1128 1129 /// \brief Retrieve the type of the Objective-C "Protocol" class. 1130 QualType getObjCProtoType() const { 1131 return getObjCInterfaceType(getObjCProtocolDecl()); 1132 } 1133 1134 void setBuiltinVaListType(QualType T); 1135 QualType getBuiltinVaListType() const { return BuiltinVaListType; } 1136 1137 /// getCVRQualifiedType - Returns a type with additional const, 1138 /// volatile, or restrict qualifiers. 1139 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1140 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1141 } 1142 1143 /// getQualifiedType - Un-split a SplitQualType. 1144 QualType getQualifiedType(SplitQualType split) const { 1145 return getQualifiedType(split.Ty, split.Quals); 1146 } 1147 1148 /// getQualifiedType - Returns a type with additional qualifiers. 1149 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1150 if (!Qs.hasNonFastQualifiers()) 1151 return T.withFastQualifiers(Qs.getFastQualifiers()); 1152 QualifierCollector Qc(Qs); 1153 const Type *Ptr = Qc.strip(T); 1154 return getExtQualType(Ptr, Qc); 1155 } 1156 1157 /// getQualifiedType - Returns a type with additional qualifiers. 1158 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1159 if (!Qs.hasNonFastQualifiers()) 1160 return QualType(T, Qs.getFastQualifiers()); 1161 return getExtQualType(T, Qs); 1162 } 1163 1164 /// getLifetimeQualifiedType - Returns a type with the given 1165 /// lifetime qualifier. 1166 QualType getLifetimeQualifiedType(QualType type, 1167 Qualifiers::ObjCLifetime lifetime) { 1168 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1169 assert(lifetime != Qualifiers::OCL_None); 1170 1171 Qualifiers qs; 1172 qs.addObjCLifetime(lifetime); 1173 return getQualifiedType(type, qs); 1174 } 1175 1176 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1177 SourceLocation NameLoc) const; 1178 1179 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1180 UnresolvedSetIterator End) const; 1181 1182 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1183 bool TemplateKeyword, 1184 TemplateDecl *Template) const; 1185 1186 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1187 const IdentifierInfo *Name) const; 1188 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1189 OverloadedOperatorKind Operator) const; 1190 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1191 TemplateName replacement) const; 1192 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1193 const TemplateArgument &ArgPack) const; 1194 1195 enum GetBuiltinTypeError { 1196 GE_None, //< No error 1197 GE_Missing_stdio, //< Missing a type from <stdio.h> 1198 GE_Missing_setjmp, //< Missing a type from <setjmp.h> 1199 GE_Missing_ucontext //< Missing a type from <ucontext.h> 1200 }; 1201 1202 /// GetBuiltinType - Return the type for the specified builtin. If 1203 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1204 /// arguments to the builtin that are required to be integer constant 1205 /// expressions. 1206 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1207 unsigned *IntegerConstantArgs = 0) const; 1208 1209private: 1210 CanQualType getFromTargetType(unsigned Type) const; 1211 1212 //===--------------------------------------------------------------------===// 1213 // Type Predicates. 1214 //===--------------------------------------------------------------------===// 1215 1216public: 1217 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1218 /// garbage collection attribute. 1219 /// 1220 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1221 1222 /// areCompatibleVectorTypes - Return true if the given vector types 1223 /// are of the same unqualified type or if they are equivalent to the same 1224 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1225 /// Neon) types. 1226 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1227 1228 /// isObjCNSObjectType - Return true if this is an NSObject object with 1229 /// its NSObject attribute set. 1230 static bool isObjCNSObjectType(QualType Ty) { 1231 return Ty->isObjCNSObjectType(); 1232 } 1233 1234 //===--------------------------------------------------------------------===// 1235 // Type Sizing and Analysis 1236 //===--------------------------------------------------------------------===// 1237 1238 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1239 /// scalar floating point type. 1240 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1241 1242 /// getTypeInfo - Get the size and alignment of the specified complete type in 1243 /// bits. 1244 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1245 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1246 return getTypeInfo(T.getTypePtr()); 1247 } 1248 1249 /// getTypeSize - Return the size of the specified type, in bits. This method 1250 /// does not work on incomplete types. 1251 uint64_t getTypeSize(QualType T) const { 1252 return getTypeInfo(T).first; 1253 } 1254 uint64_t getTypeSize(const Type *T) const { 1255 return getTypeInfo(T).first; 1256 } 1257 1258 /// getCharWidth - Return the size of the character type, in bits 1259 uint64_t getCharWidth() const { 1260 return getTypeSize(CharTy); 1261 } 1262 1263 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1264 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1265 1266 /// toBits - Convert a size in characters to a size in bits. 1267 int64_t toBits(CharUnits CharSize) const; 1268 1269 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1270 /// This method does not work on incomplete types. 1271 CharUnits getTypeSizeInChars(QualType T) const; 1272 CharUnits getTypeSizeInChars(const Type *T) const; 1273 1274 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1275 /// This method does not work on incomplete types. 1276 unsigned getTypeAlign(QualType T) const { 1277 return getTypeInfo(T).second; 1278 } 1279 unsigned getTypeAlign(const Type *T) const { 1280 return getTypeInfo(T).second; 1281 } 1282 1283 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1284 /// characters. This method does not work on incomplete types. 1285 CharUnits getTypeAlignInChars(QualType T) const; 1286 CharUnits getTypeAlignInChars(const Type *T) const; 1287 1288 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1289 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1290 1291 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1292 /// type for the current target in bits. This can be different than the ABI 1293 /// alignment in cases where it is beneficial for performance to overalign 1294 /// a data type. 1295 unsigned getPreferredTypeAlign(const Type *T) const; 1296 1297 /// getDeclAlign - Return a conservative estimate of the alignment of 1298 /// the specified decl. Note that bitfields do not have a valid alignment, so 1299 /// this method will assert on them. 1300 /// If @p RefAsPointee, references are treated like their underlying type 1301 /// (for alignof), else they're treated like pointers (for CodeGen). 1302 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1303 1304 /// getASTRecordLayout - Get or compute information about the layout of the 1305 /// specified record (struct/union/class), which indicates its size and field 1306 /// position information. 1307 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1308 1309 /// getASTObjCInterfaceLayout - Get or compute information about the 1310 /// layout of the specified Objective-C interface. 1311 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1312 const; 1313 1314 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1315 bool Simple = false) const; 1316 1317 /// getASTObjCImplementationLayout - Get or compute information about 1318 /// the layout of the specified Objective-C implementation. This may 1319 /// differ from the interface if synthesized ivars are present. 1320 const ASTRecordLayout & 1321 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1322 1323 /// getKeyFunction - Get the key function for the given record decl, or NULL 1324 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1325 /// section 5.2.3: 1326 /// 1327 /// ...the first non-pure virtual function that is not inline at the point 1328 /// of class definition. 1329 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1330 1331 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1332 uint64_t getFieldOffset(const ValueDecl *FD) const; 1333 1334 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1335 1336 MangleContext *createMangleContext(); 1337 1338 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1339 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1340 1341 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1342 void CollectInheritedProtocols(const Decl *CDecl, 1343 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1344 1345 //===--------------------------------------------------------------------===// 1346 // Type Operators 1347 //===--------------------------------------------------------------------===// 1348 1349 /// getCanonicalType - Return the canonical (structural) type corresponding to 1350 /// the specified potentially non-canonical type. The non-canonical version 1351 /// of a type may have many "decorated" versions of types. Decorators can 1352 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1353 /// to be free of any of these, allowing two canonical types to be compared 1354 /// for exact equality with a simple pointer comparison. 1355 CanQualType getCanonicalType(QualType T) const { 1356 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1357 } 1358 1359 const Type *getCanonicalType(const Type *T) const { 1360 return T->getCanonicalTypeInternal().getTypePtr(); 1361 } 1362 1363 /// getCanonicalParamType - Return the canonical parameter type 1364 /// corresponding to the specific potentially non-canonical one. 1365 /// Qualifiers are stripped off, functions are turned into function 1366 /// pointers, and arrays decay one level into pointers. 1367 CanQualType getCanonicalParamType(QualType T) const; 1368 1369 /// \brief Determine whether the given types are equivalent. 1370 bool hasSameType(QualType T1, QualType T2) const { 1371 return getCanonicalType(T1) == getCanonicalType(T2); 1372 } 1373 1374 /// \brief Returns this type as a completely-unqualified array type, 1375 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1376 /// sugaring from the types, similar to the behavior of 1377 /// QualType::getUnqualifiedType(). 1378 /// 1379 /// \param T is the qualified type, which may be an ArrayType 1380 /// 1381 /// \param Quals will receive the full set of qualifiers that were 1382 /// applied to the array. 1383 /// 1384 /// \returns if this is an array type, the completely unqualified array type 1385 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1386 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1387 1388 /// \brief Determine whether the given types are equivalent after 1389 /// cvr-qualifiers have been removed. 1390 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1391 return getCanonicalType(T1).getTypePtr() == 1392 getCanonicalType(T2).getTypePtr(); 1393 } 1394 1395 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1396 1397 /// \brief Retrieves the "canonical" nested name specifier for a 1398 /// given nested name specifier. 1399 /// 1400 /// The canonical nested name specifier is a nested name specifier 1401 /// that uniquely identifies a type or namespace within the type 1402 /// system. For example, given: 1403 /// 1404 /// \code 1405 /// namespace N { 1406 /// struct S { 1407 /// template<typename T> struct X { typename T* type; }; 1408 /// }; 1409 /// } 1410 /// 1411 /// template<typename T> struct Y { 1412 /// typename N::S::X<T>::type member; 1413 /// }; 1414 /// \endcode 1415 /// 1416 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1417 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1418 /// by declarations in the type system and the canonical type for 1419 /// the template type parameter 'T' is template-param-0-0. 1420 NestedNameSpecifier * 1421 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1422 1423 /// \brief Retrieves the default calling convention to use for 1424 /// C++ instance methods. 1425 CallingConv getDefaultMethodCallConv(); 1426 1427 /// \brief Retrieves the canonical representation of the given 1428 /// calling convention. 1429 CallingConv getCanonicalCallConv(CallingConv CC) const { 1430 if (!LangOpts.MRTD && CC == CC_C) 1431 return CC_Default; 1432 return CC; 1433 } 1434 1435 /// \brief Determines whether two calling conventions name the same 1436 /// calling convention. 1437 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1438 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1439 } 1440 1441 /// \brief Retrieves the "canonical" template name that refers to a 1442 /// given template. 1443 /// 1444 /// The canonical template name is the simplest expression that can 1445 /// be used to refer to a given template. For most templates, this 1446 /// expression is just the template declaration itself. For example, 1447 /// the template std::vector can be referred to via a variety of 1448 /// names---std::vector, ::std::vector, vector (if vector is in 1449 /// scope), etc.---but all of these names map down to the same 1450 /// TemplateDecl, which is used to form the canonical template name. 1451 /// 1452 /// Dependent template names are more interesting. Here, the 1453 /// template name could be something like T::template apply or 1454 /// std::allocator<T>::template rebind, where the nested name 1455 /// specifier itself is dependent. In this case, the canonical 1456 /// template name uses the shortest form of the dependent 1457 /// nested-name-specifier, which itself contains all canonical 1458 /// types, values, and templates. 1459 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1460 1461 /// \brief Determine whether the given template names refer to the same 1462 /// template. 1463 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1464 1465 /// \brief Retrieve the "canonical" template argument. 1466 /// 1467 /// The canonical template argument is the simplest template argument 1468 /// (which may be a type, value, expression, or declaration) that 1469 /// expresses the value of the argument. 1470 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1471 const; 1472 1473 /// Type Query functions. If the type is an instance of the specified class, 1474 /// return the Type pointer for the underlying maximally pretty type. This 1475 /// is a member of ASTContext because this may need to do some amount of 1476 /// canonicalization, e.g. to move type qualifiers into the element type. 1477 const ArrayType *getAsArrayType(QualType T) const; 1478 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1479 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1480 } 1481 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1482 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1483 } 1484 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1485 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1486 } 1487 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1488 const { 1489 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1490 } 1491 1492 /// getBaseElementType - Returns the innermost element type of an array type. 1493 /// For example, will return "int" for int[m][n] 1494 QualType getBaseElementType(const ArrayType *VAT) const; 1495 1496 /// getBaseElementType - Returns the innermost element type of a type 1497 /// (which needn't actually be an array type). 1498 QualType getBaseElementType(QualType QT) const; 1499 1500 /// getConstantArrayElementCount - Returns number of constant array elements. 1501 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1502 1503 /// \brief Perform adjustment on the parameter type of a function. 1504 /// 1505 /// This routine adjusts the given parameter type @p T to the actual 1506 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1507 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1508 QualType getAdjustedParameterType(QualType T); 1509 1510 /// \brief Retrieve the parameter type as adjusted for use in the signature 1511 /// of a function, decaying array and function types and removing top-level 1512 /// cv-qualifiers. 1513 QualType getSignatureParameterType(QualType T); 1514 1515 /// getArrayDecayedType - Return the properly qualified result of decaying the 1516 /// specified array type to a pointer. This operation is non-trivial when 1517 /// handling typedefs etc. The canonical type of "T" must be an array type, 1518 /// this returns a pointer to a properly qualified element of the array. 1519 /// 1520 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1521 QualType getArrayDecayedType(QualType T) const; 1522 1523 /// getPromotedIntegerType - Returns the type that Promotable will 1524 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1525 /// integer type. 1526 QualType getPromotedIntegerType(QualType PromotableType) const; 1527 1528 /// \brief Recurses in pointer/array types until it finds an objc retainable 1529 /// type and returns its ownership. 1530 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1531 1532 /// \brief Whether this is a promotable bitfield reference according 1533 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1534 /// 1535 /// \returns the type this bit-field will promote to, or NULL if no 1536 /// promotion occurs. 1537 QualType isPromotableBitField(Expr *E) const; 1538 1539 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1540 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1541 /// LHS < RHS, return -1. 1542 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1543 1544 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1545 /// point types, ignoring the domain of the type (i.e. 'double' == 1546 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1547 /// LHS < RHS, return -1. 1548 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1549 1550 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1551 /// point or a complex type (based on typeDomain/typeSize). 1552 /// 'typeDomain' is a real floating point or complex type. 1553 /// 'typeSize' is a real floating point or complex type. 1554 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1555 QualType typeDomain) const; 1556 1557 unsigned getTargetAddressSpace(QualType T) const { 1558 return getTargetAddressSpace(T.getQualifiers()); 1559 } 1560 1561 unsigned getTargetAddressSpace(Qualifiers Q) const { 1562 return getTargetAddressSpace(Q.getAddressSpace()); 1563 } 1564 1565 unsigned getTargetAddressSpace(unsigned AS) const { 1566 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1567 return AS; 1568 else 1569 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1570 } 1571 1572private: 1573 // Helper for integer ordering 1574 unsigned getIntegerRank(const Type *T) const; 1575 1576public: 1577 1578 //===--------------------------------------------------------------------===// 1579 // Type Compatibility Predicates 1580 //===--------------------------------------------------------------------===// 1581 1582 /// Compatibility predicates used to check assignment expressions. 1583 bool typesAreCompatible(QualType T1, QualType T2, 1584 bool CompareUnqualified = false); // C99 6.2.7p1 1585 1586 bool propertyTypesAreCompatible(QualType, QualType); 1587 bool typesAreBlockPointerCompatible(QualType, QualType); 1588 1589 bool isObjCIdType(QualType T) const { 1590 return T == getObjCIdType(); 1591 } 1592 bool isObjCClassType(QualType T) const { 1593 return T == getObjCClassType(); 1594 } 1595 bool isObjCSelType(QualType T) const { 1596 return T == getObjCSelType(); 1597 } 1598 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1599 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1600 bool ForCompare); 1601 1602 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1603 1604 // Check the safety of assignment from LHS to RHS 1605 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1606 const ObjCObjectPointerType *RHSOPT); 1607 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1608 const ObjCObjectType *RHS); 1609 bool canAssignObjCInterfacesInBlockPointer( 1610 const ObjCObjectPointerType *LHSOPT, 1611 const ObjCObjectPointerType *RHSOPT, 1612 bool BlockReturnType); 1613 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1614 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1615 const ObjCObjectPointerType *RHSOPT); 1616 bool canBindObjCObjectType(QualType To, QualType From); 1617 1618 // Functions for calculating composite types 1619 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1620 bool Unqualified = false, bool BlockReturnType = false); 1621 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1622 bool Unqualified = false); 1623 QualType mergeFunctionArgumentTypes(QualType, QualType, 1624 bool OfBlockPointer=false, 1625 bool Unqualified = false); 1626 QualType mergeTransparentUnionType(QualType, QualType, 1627 bool OfBlockPointer=false, 1628 bool Unqualified = false); 1629 1630 QualType mergeObjCGCQualifiers(QualType, QualType); 1631 1632 bool FunctionTypesMatchOnNSConsumedAttrs( 1633 const FunctionProtoType *FromFunctionType, 1634 const FunctionProtoType *ToFunctionType); 1635 1636 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1637 ObjCLayouts[CD] = 0; 1638 } 1639 1640 //===--------------------------------------------------------------------===// 1641 // Integer Predicates 1642 //===--------------------------------------------------------------------===// 1643 1644 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1645 // of bits in an integer type excluding any padding bits. 1646 unsigned getIntWidth(QualType T) const; 1647 1648 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1649 // unsigned integer type. This method takes a signed type, and returns the 1650 // corresponding unsigned integer type. 1651 QualType getCorrespondingUnsignedType(QualType T); 1652 1653 //===--------------------------------------------------------------------===// 1654 // Type Iterators. 1655 //===--------------------------------------------------------------------===// 1656 1657 typedef std::vector<Type*>::iterator type_iterator; 1658 typedef std::vector<Type*>::const_iterator const_type_iterator; 1659 1660 type_iterator types_begin() { return Types.begin(); } 1661 type_iterator types_end() { return Types.end(); } 1662 const_type_iterator types_begin() const { return Types.begin(); } 1663 const_type_iterator types_end() const { return Types.end(); } 1664 1665 //===--------------------------------------------------------------------===// 1666 // Integer Values 1667 //===--------------------------------------------------------------------===// 1668 1669 /// MakeIntValue - Make an APSInt of the appropriate width and 1670 /// signedness for the given \arg Value and integer \arg Type. 1671 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1672 llvm::APSInt Res(getIntWidth(Type), 1673 !Type->isSignedIntegerOrEnumerationType()); 1674 Res = Value; 1675 return Res; 1676 } 1677 1678 bool isSentinelNullExpr(const Expr *E); 1679 1680 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1681 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1682 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1683 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1684 1685 /// \brief returns true if there is at lease one @implementation in TU. 1686 bool AnyObjCImplementation() { 1687 return !ObjCImpls.empty(); 1688 } 1689 1690 /// \brief Set the implementation of ObjCInterfaceDecl. 1691 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1692 ObjCImplementationDecl *ImplD); 1693 /// \brief Set the implementation of ObjCCategoryDecl. 1694 void setObjCImplementation(ObjCCategoryDecl *CatD, 1695 ObjCCategoryImplDecl *ImplD); 1696 1697 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1698 /// interface, or null if non exists. 1699 const ObjCMethodDecl *getObjCMethodRedeclaration( 1700 const ObjCMethodDecl *MD) const { 1701 llvm::DenseMap<const ObjCMethodDecl*, const ObjCMethodDecl*>::const_iterator 1702 I = ObjCMethodRedecls.find(MD); 1703 if (I == ObjCMethodRedecls.end()) 1704 return 0; 1705 return I->second; 1706 } 1707 1708 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1709 const ObjCMethodDecl *Redecl) { 1710 ObjCMethodRedecls[MD] = Redecl; 1711 } 1712 1713 /// \brief Returns the objc interface that \arg ND belongs to if it is a 1714 /// objc method/property/ivar etc. that is part of an interface, 1715 /// otherwise returns null. 1716 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1717 1718 /// \brief Set the copy inialization expression of a block var decl. 1719 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1720 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1721 /// none exists. 1722 Expr *getBlockVarCopyInits(const VarDecl*VD); 1723 1724 /// \brief Allocate an uninitialized TypeSourceInfo. 1725 /// 1726 /// The caller should initialize the memory held by TypeSourceInfo using 1727 /// the TypeLoc wrappers. 1728 /// 1729 /// \param T the type that will be the basis for type source info. This type 1730 /// should refer to how the declarator was written in source code, not to 1731 /// what type semantic analysis resolved the declarator to. 1732 /// 1733 /// \param Size the size of the type info to create, or 0 if the size 1734 /// should be calculated based on the type. 1735 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1736 1737 /// \brief Allocate a TypeSourceInfo where all locations have been 1738 /// initialized to a given location, which defaults to the empty 1739 /// location. 1740 TypeSourceInfo * 1741 getTrivialTypeSourceInfo(QualType T, 1742 SourceLocation Loc = SourceLocation()) const; 1743 1744 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1745 1746 /// \brief Add a deallocation callback that will be invoked when the 1747 /// ASTContext is destroyed. 1748 /// 1749 /// \brief Callback A callback function that will be invoked on destruction. 1750 /// 1751 /// \brief Data Pointer data that will be provided to the callback function 1752 /// when it is called. 1753 void AddDeallocation(void (*Callback)(void*), void *Data); 1754 1755 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1756 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1757 1758 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1759 /// lazily, only when used; this is only relevant for function or file scoped 1760 /// var definitions. 1761 /// 1762 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1763 /// it is not used. 1764 bool DeclMustBeEmitted(const Decl *D); 1765 1766 1767 /// \brief Used by ParmVarDecl to store on the side the 1768 /// index of the parameter when it exceeds the size of the normal bitfield. 1769 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1770 1771 /// \brief Used by ParmVarDecl to retrieve on the side the 1772 /// index of the parameter when it exceeds the size of the normal bitfield. 1773 unsigned getParameterIndex(const ParmVarDecl *D) const; 1774 1775 //===--------------------------------------------------------------------===// 1776 // Statistics 1777 //===--------------------------------------------------------------------===// 1778 1779 /// \brief The number of implicitly-declared default constructors. 1780 static unsigned NumImplicitDefaultConstructors; 1781 1782 /// \brief The number of implicitly-declared default constructors for 1783 /// which declarations were built. 1784 static unsigned NumImplicitDefaultConstructorsDeclared; 1785 1786 /// \brief The number of implicitly-declared copy constructors. 1787 static unsigned NumImplicitCopyConstructors; 1788 1789 /// \brief The number of implicitly-declared copy constructors for 1790 /// which declarations were built. 1791 static unsigned NumImplicitCopyConstructorsDeclared; 1792 1793 /// \brief The number of implicitly-declared move constructors. 1794 static unsigned NumImplicitMoveConstructors; 1795 1796 /// \brief The number of implicitly-declared move constructors for 1797 /// which declarations were built. 1798 static unsigned NumImplicitMoveConstructorsDeclared; 1799 1800 /// \brief The number of implicitly-declared copy assignment operators. 1801 static unsigned NumImplicitCopyAssignmentOperators; 1802 1803 /// \brief The number of implicitly-declared copy assignment operators for 1804 /// which declarations were built. 1805 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1806 1807 /// \brief The number of implicitly-declared move assignment operators. 1808 static unsigned NumImplicitMoveAssignmentOperators; 1809 1810 /// \brief The number of implicitly-declared move assignment operators for 1811 /// which declarations were built. 1812 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1813 1814 /// \brief The number of implicitly-declared destructors. 1815 static unsigned NumImplicitDestructors; 1816 1817 /// \brief The number of implicitly-declared destructors for which 1818 /// declarations were built. 1819 static unsigned NumImplicitDestructorsDeclared; 1820 1821private: 1822 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1823 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1824 1825public: 1826 /// \brief Initialize built-in types. 1827 /// 1828 /// This routine may only be invoked once for a given ASTContext object. 1829 /// It is normally invoked by the ASTContext constructor. However, the 1830 /// constructor can be asked to delay initialization, which places the burden 1831 /// of calling this function on the user of that object. 1832 /// 1833 /// \param Target The target 1834 void InitBuiltinTypes(const TargetInfo &Target); 1835 1836private: 1837 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1838 1839 // Return the ObjC type encoding for a given type. 1840 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 1841 bool ExpandPointedToStructures, 1842 bool ExpandStructures, 1843 const FieldDecl *Field, 1844 bool OutermostType = false, 1845 bool EncodingProperty = false, 1846 bool StructField = false, 1847 bool EncodeBlockParameters = false, 1848 bool EncodeClassNames = false) const; 1849 1850 // Adds the encoding of the structure's members. 1851 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 1852 const FieldDecl *Field, 1853 bool includeVBases = true) const; 1854 1855 // Adds the encoding of a method parameter or return type. 1856 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 1857 QualType T, std::string& S, 1858 bool Extended) const; 1859 1860 const ASTRecordLayout & 1861 getObjCLayout(const ObjCInterfaceDecl *D, 1862 const ObjCImplementationDecl *Impl) const; 1863 1864private: 1865 /// \brief A set of deallocations that should be performed when the 1866 /// ASTContext is destroyed. 1867 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 1868 1869 // FIXME: This currently contains the set of StoredDeclMaps used 1870 // by DeclContext objects. This probably should not be in ASTContext, 1871 // but we include it here so that ASTContext can quickly deallocate them. 1872 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 1873 1874 /// \brief A counter used to uniquely identify "blocks". 1875 mutable unsigned int UniqueBlockByRefTypeID; 1876 1877 friend class DeclContext; 1878 friend class DeclarationNameTable; 1879 void ReleaseDeclContextMaps(); 1880}; 1881 1882/// @brief Utility function for constructing a nullary selector. 1883static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 1884 IdentifierInfo* II = &Ctx.Idents.get(name); 1885 return Ctx.Selectors.getSelector(0, &II); 1886} 1887 1888/// @brief Utility function for constructing an unary selector. 1889static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 1890 IdentifierInfo* II = &Ctx.Idents.get(name); 1891 return Ctx.Selectors.getSelector(1, &II); 1892} 1893 1894} // end namespace clang 1895 1896// operator new and delete aren't allowed inside namespaces. 1897// The throw specifications are mandated by the standard. 1898/// @brief Placement new for using the ASTContext's allocator. 1899/// 1900/// This placement form of operator new uses the ASTContext's allocator for 1901/// obtaining memory. It is a non-throwing new, which means that it returns 1902/// null on error. (If that is what the allocator does. The current does, so if 1903/// this ever changes, this operator will have to be changed, too.) 1904/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1905/// @code 1906/// // Default alignment (8) 1907/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 1908/// // Specific alignment 1909/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 1910/// @endcode 1911/// Please note that you cannot use delete on the pointer; it must be 1912/// deallocated using an explicit destructor call followed by 1913/// @c Context.Deallocate(Ptr). 1914/// 1915/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1916/// @param C The ASTContext that provides the allocator. 1917/// @param Alignment The alignment of the allocated memory (if the underlying 1918/// allocator supports it). 1919/// @return The allocated memory. Could be NULL. 1920inline void *operator new(size_t Bytes, const clang::ASTContext &C, 1921 size_t Alignment) throw () { 1922 return C.Allocate(Bytes, Alignment); 1923} 1924/// @brief Placement delete companion to the new above. 1925/// 1926/// This operator is just a companion to the new above. There is no way of 1927/// invoking it directly; see the new operator for more details. This operator 1928/// is called implicitly by the compiler if a placement new expression using 1929/// the ASTContext throws in the object constructor. 1930inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) 1931 throw () { 1932 C.Deallocate(Ptr); 1933} 1934 1935/// This placement form of operator new[] uses the ASTContext's allocator for 1936/// obtaining memory. It is a non-throwing new[], which means that it returns 1937/// null on error. 1938/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 1939/// @code 1940/// // Default alignment (8) 1941/// char *data = new (Context) char[10]; 1942/// // Specific alignment 1943/// char *data = new (Context, 4) char[10]; 1944/// @endcode 1945/// Please note that you cannot use delete on the pointer; it must be 1946/// deallocated using an explicit destructor call followed by 1947/// @c Context.Deallocate(Ptr). 1948/// 1949/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 1950/// @param C The ASTContext that provides the allocator. 1951/// @param Alignment The alignment of the allocated memory (if the underlying 1952/// allocator supports it). 1953/// @return The allocated memory. Could be NULL. 1954inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 1955 size_t Alignment = 8) throw () { 1956 return C.Allocate(Bytes, Alignment); 1957} 1958 1959/// @brief Placement delete[] companion to the new[] above. 1960/// 1961/// This operator is just a companion to the new[] above. There is no way of 1962/// invoking it directly; see the new[] operator for more details. This operator 1963/// is called implicitly by the compiler if a placement new[] expression using 1964/// the ASTContext throws in the object constructor. 1965inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) 1966 throw () { 1967 C.Deallocate(Ptr); 1968} 1969 1970#endif 1971