ASTContext.h revision 749ace614b6ea1ae11d194a60b18e1e43e1db243
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/// \file 11/// \brief Defines the clang::ASTContext interface. 12/// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_AST_ASTCONTEXT_H 16#define LLVM_CLANG_AST_ASTCONTEXT_H 17 18#include "clang/Basic/AddressSpaces.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/LangOptions.h" 21#include "clang/Basic/OperatorKinds.h" 22#include "clang/Basic/PartialDiagnostic.h" 23#include "clang/Basic/VersionTuple.h" 24#include "clang/AST/Decl.h" 25#include "clang/AST/LambdaMangleContext.h" 26#include "clang/AST/NestedNameSpecifier.h" 27#include "clang/AST/PrettyPrinter.h" 28#include "clang/AST/TemplateName.h" 29#include "clang/AST/Type.h" 30#include "clang/AST/CanonicalType.h" 31#include "clang/AST/RawCommentList.h" 32#include "clang/AST/CommentCommandTraits.h" 33#include "llvm/ADT/DenseMap.h" 34#include "llvm/ADT/FoldingSet.h" 35#include "llvm/ADT/IntrusiveRefCntPtr.h" 36#include "llvm/ADT/OwningPtr.h" 37#include "llvm/ADT/SmallPtrSet.h" 38#include "llvm/ADT/TinyPtrVector.h" 39#include "llvm/Support/Allocator.h" 40#include <vector> 41 42namespace llvm { 43 struct fltSemantics; 44} 45 46namespace clang { 47 class FileManager; 48 class ASTRecordLayout; 49 class BlockExpr; 50 class CharUnits; 51 class DiagnosticsEngine; 52 class Expr; 53 class ExternalASTSource; 54 class ASTMutationListener; 55 class IdentifierTable; 56 class SelectorTable; 57 class TargetInfo; 58 class CXXABI; 59 // Decls 60 class DeclContext; 61 class CXXConversionDecl; 62 class CXXMethodDecl; 63 class CXXRecordDecl; 64 class Decl; 65 class FieldDecl; 66 class MangleContext; 67 class ObjCIvarDecl; 68 class ObjCIvarRefExpr; 69 class ObjCPropertyDecl; 70 class ParmVarDecl; 71 class RecordDecl; 72 class StoredDeclsMap; 73 class TagDecl; 74 class TemplateTemplateParmDecl; 75 class TemplateTypeParmDecl; 76 class TranslationUnitDecl; 77 class TypeDecl; 78 class TypedefNameDecl; 79 class UsingDecl; 80 class UsingShadowDecl; 81 class UnresolvedSetIterator; 82 83 namespace Builtin { class Context; } 84 85 namespace comments { 86 class FullComment; 87 } 88 89/// \brief Holds long-lived AST nodes (such as types and decls) that can be 90/// referred to throughout the semantic analysis of a file. 91class ASTContext : public RefCountedBase<ASTContext> { 92 ASTContext &this_() { return *this; } 93 94 mutable std::vector<Type*> Types; 95 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 96 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 97 mutable llvm::FoldingSet<PointerType> PointerTypes; 98 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 99 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 100 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 101 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 102 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 103 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 104 mutable std::vector<VariableArrayType*> VariableArrayTypes; 105 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 106 mutable llvm::FoldingSet<DependentSizedExtVectorType> 107 DependentSizedExtVectorTypes; 108 mutable llvm::FoldingSet<VectorType> VectorTypes; 109 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 110 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 111 FunctionProtoTypes; 112 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 113 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 114 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 115 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 116 SubstTemplateTypeParmTypes; 117 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 118 SubstTemplateTypeParmPackTypes; 119 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 120 TemplateSpecializationTypes; 121 mutable llvm::FoldingSet<ParenType> ParenTypes; 122 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 123 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 124 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 125 ASTContext&> 126 DependentTemplateSpecializationTypes; 127 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 128 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 129 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 130 mutable llvm::FoldingSet<AutoType> AutoTypes; 131 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 132 llvm::FoldingSet<AttributedType> AttributedTypes; 133 134 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 135 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 136 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 137 SubstTemplateTemplateParms; 138 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 139 ASTContext&> 140 SubstTemplateTemplateParmPacks; 141 142 /// \brief The set of nested name specifiers. 143 /// 144 /// This set is managed by the NestedNameSpecifier class. 145 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 146 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 147 friend class NestedNameSpecifier; 148 149 /// \brief A cache mapping from RecordDecls to ASTRecordLayouts. 150 /// 151 /// This is lazily created. This is intentionally not serialized. 152 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 153 ASTRecordLayouts; 154 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 155 ObjCLayouts; 156 157 /// \brief A cache from types to size and alignment information. 158 typedef llvm::DenseMap<const Type*, 159 std::pair<uint64_t, unsigned> > TypeInfoMap; 160 mutable TypeInfoMap MemoizedTypeInfo; 161 162 /// \brief A cache mapping from CXXRecordDecls to key functions. 163 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 164 165 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 166 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 167 168 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 169 /// interface. 170 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 171 172 /// \brief Mapping from __block VarDecls to their copy initialization expr. 173 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 174 175 /// \brief Mapping from class scope functions specialization to their 176 /// template patterns. 177 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 178 ClassScopeSpecializationPattern; 179 180 /// \brief Representation of a "canonical" template template parameter that 181 /// is used in canonical template names. 182 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 183 TemplateTemplateParmDecl *Parm; 184 185 public: 186 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 187 : Parm(Parm) { } 188 189 TemplateTemplateParmDecl *getParam() const { return Parm; } 190 191 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 192 193 static void Profile(llvm::FoldingSetNodeID &ID, 194 TemplateTemplateParmDecl *Parm); 195 }; 196 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 197 CanonTemplateTemplateParms; 198 199 TemplateTemplateParmDecl * 200 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 201 202 /// \brief The typedef for the __int128_t type. 203 mutable TypedefDecl *Int128Decl; 204 205 /// \brief The typedef for the __uint128_t type. 206 mutable TypedefDecl *UInt128Decl; 207 208 /// \brief The typedef for the target specific predefined 209 /// __builtin_va_list type. 210 mutable TypedefDecl *BuiltinVaListDecl; 211 212 /// \brief The typedef for the predefined \c id type. 213 mutable TypedefDecl *ObjCIdDecl; 214 215 /// \brief The typedef for the predefined \c SEL type. 216 mutable TypedefDecl *ObjCSelDecl; 217 218 /// \brief The typedef for the predefined \c Class type. 219 mutable TypedefDecl *ObjCClassDecl; 220 221 /// \brief The typedef for the predefined \c Protocol class in Objective-C. 222 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 223 224 /// \brief The typedef for the predefined 'BOOL' type. 225 mutable TypedefDecl *BOOLDecl; 226 227 // Typedefs which may be provided defining the structure of Objective-C 228 // pseudo-builtins 229 QualType ObjCIdRedefinitionType; 230 QualType ObjCClassRedefinitionType; 231 QualType ObjCSelRedefinitionType; 232 233 QualType ObjCConstantStringType; 234 mutable RecordDecl *CFConstantStringTypeDecl; 235 236 QualType ObjCNSStringType; 237 238 /// \brief The typedef declaration for the Objective-C "instancetype" type. 239 TypedefDecl *ObjCInstanceTypeDecl; 240 241 /// \brief The type for the C FILE type. 242 TypeDecl *FILEDecl; 243 244 /// \brief The type for the C jmp_buf type. 245 TypeDecl *jmp_bufDecl; 246 247 /// \brief The type for the C sigjmp_buf type. 248 TypeDecl *sigjmp_bufDecl; 249 250 /// \brief The type for the C ucontext_t type. 251 TypeDecl *ucontext_tDecl; 252 253 /// \brief Type for the Block descriptor for Blocks CodeGen. 254 /// 255 /// Since this is only used for generation of debug info, it is not 256 /// serialized. 257 mutable RecordDecl *BlockDescriptorType; 258 259 /// \brief Type for the Block descriptor for Blocks CodeGen. 260 /// 261 /// Since this is only used for generation of debug info, it is not 262 /// serialized. 263 mutable RecordDecl *BlockDescriptorExtendedType; 264 265 /// \brief Declaration for the CUDA cudaConfigureCall function. 266 FunctionDecl *cudaConfigureCallDecl; 267 268 TypeSourceInfo NullTypeSourceInfo; 269 270 /// \brief Keeps track of all declaration attributes. 271 /// 272 /// Since so few decls have attrs, we keep them in a hash map instead of 273 /// wasting space in the Decl class. 274 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 275 276 /// \brief Keeps track of the static data member templates from which 277 /// static data members of class template specializations were instantiated. 278 /// 279 /// This data structure stores the mapping from instantiations of static 280 /// data members to the static data member representations within the 281 /// class template from which they were instantiated along with the kind 282 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 283 /// 284 /// Given the following example: 285 /// 286 /// \code 287 /// template<typename T> 288 /// struct X { 289 /// static T value; 290 /// }; 291 /// 292 /// template<typename T> 293 /// T X<T>::value = T(17); 294 /// 295 /// int *x = &X<int>::value; 296 /// \endcode 297 /// 298 /// This mapping will contain an entry that maps from the VarDecl for 299 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 300 /// class template X) and will be marked TSK_ImplicitInstantiation. 301 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 302 InstantiatedFromStaticDataMember; 303 304 /// \brief Keeps track of the declaration from which a UsingDecl was 305 /// created during instantiation. 306 /// 307 /// The source declaration is always a UsingDecl, an UnresolvedUsingValueDecl, 308 /// or an UnresolvedUsingTypenameDecl. 309 /// 310 /// For example: 311 /// \code 312 /// template<typename T> 313 /// struct A { 314 /// void f(); 315 /// }; 316 /// 317 /// template<typename T> 318 /// struct B : A<T> { 319 /// using A<T>::f; 320 /// }; 321 /// 322 /// template struct B<int>; 323 /// \endcode 324 /// 325 /// This mapping will contain an entry that maps from the UsingDecl in 326 /// B<int> to the UnresolvedUsingDecl in B<T>. 327 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 328 329 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 330 InstantiatedFromUsingShadowDecl; 331 332 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 333 334 /// \brief Mapping that stores the methods overridden by a given C++ 335 /// member function. 336 /// 337 /// Since most C++ member functions aren't virtual and therefore 338 /// don't override anything, we store the overridden functions in 339 /// this map on the side rather than within the CXXMethodDecl structure. 340 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 341 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 342 343 /// \brief Mapping from each declaration context to its corresponding lambda 344 /// mangling context. 345 llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts; 346 347 /// \brief Mapping that stores parameterIndex values for ParmVarDecls when 348 /// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex. 349 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 350 ParameterIndexTable ParamIndices; 351 352 ImportDecl *FirstLocalImport; 353 ImportDecl *LastLocalImport; 354 355 TranslationUnitDecl *TUDecl; 356 357 /// \brief The associated SourceManager object.a 358 SourceManager &SourceMgr; 359 360 /// \brief The language options used to create the AST associated with 361 /// this ASTContext object. 362 LangOptions &LangOpts; 363 364 /// \brief The allocator used to create AST objects. 365 /// 366 /// AST objects are never destructed; rather, all memory associated with the 367 /// AST objects will be released when the ASTContext itself is destroyed. 368 mutable llvm::BumpPtrAllocator BumpAlloc; 369 370 /// \brief Allocator for partial diagnostics. 371 PartialDiagnostic::StorageAllocator DiagAllocator; 372 373 /// \brief The current C++ ABI. 374 OwningPtr<CXXABI> ABI; 375 CXXABI *createCXXABI(const TargetInfo &T); 376 377 /// \brief The logical -> physical address space map. 378 const LangAS::Map *AddrSpaceMap; 379 380 friend class ASTDeclReader; 381 friend class ASTReader; 382 friend class ASTWriter; 383 friend class CXXRecordDecl; 384 385 const TargetInfo *Target; 386 clang::PrintingPolicy PrintingPolicy; 387 388public: 389 IdentifierTable &Idents; 390 SelectorTable &Selectors; 391 Builtin::Context &BuiltinInfo; 392 mutable DeclarationNameTable DeclarationNames; 393 OwningPtr<ExternalASTSource> ExternalSource; 394 ASTMutationListener *Listener; 395 396 const clang::PrintingPolicy &getPrintingPolicy() const { 397 return PrintingPolicy; 398 } 399 400 void setPrintingPolicy(const clang::PrintingPolicy &Policy) { 401 PrintingPolicy = Policy; 402 } 403 404 SourceManager& getSourceManager() { return SourceMgr; } 405 const SourceManager& getSourceManager() const { return SourceMgr; } 406 407 llvm::BumpPtrAllocator &getAllocator() const { 408 return BumpAlloc; 409 } 410 411 void *Allocate(unsigned Size, unsigned Align = 8) const { 412 return BumpAlloc.Allocate(Size, Align); 413 } 414 void Deallocate(void *Ptr) const { } 415 416 /// Return the total amount of physical memory allocated for representing 417 /// AST nodes and type information. 418 size_t getASTAllocatedMemory() const { 419 return BumpAlloc.getTotalMemory(); 420 } 421 /// Return the total memory used for various side tables. 422 size_t getSideTableAllocatedMemory() const; 423 424 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 425 return DiagAllocator; 426 } 427 428 const TargetInfo &getTargetInfo() const { return *Target; } 429 430 const LangOptions& getLangOpts() const { return LangOpts; } 431 432 DiagnosticsEngine &getDiagnostics() const; 433 434 FullSourceLoc getFullLoc(SourceLocation Loc) const { 435 return FullSourceLoc(Loc,SourceMgr); 436 } 437 438 /// \brief All comments in this translation unit. 439 RawCommentList Comments; 440 441 /// \brief True if comments are already loaded from ExternalASTSource. 442 mutable bool CommentsLoaded; 443 444 class RawCommentAndCacheFlags { 445 public: 446 enum Kind { 447 /// We searched for a comment attached to the particular declaration, but 448 /// didn't find any. 449 /// 450 /// getRaw() == 0. 451 NoCommentInDecl = 0, 452 453 /// We have found a comment attached to this particular declaration. 454 /// 455 /// getRaw() != 0. 456 FromDecl, 457 458 /// This declaration does not have an attached comment, and we have 459 /// searched the redeclaration chain. 460 /// 461 /// If getRaw() == 0, the whole redeclaration chain does not have any 462 /// comments. 463 /// 464 /// If getRaw() != 0, it is a comment propagated from other 465 /// redeclaration. 466 FromRedecl 467 }; 468 469 Kind getKind() const LLVM_READONLY { 470 return Data.getInt(); 471 } 472 473 void setKind(Kind K) { 474 Data.setInt(K); 475 } 476 477 const RawComment *getRaw() const LLVM_READONLY { 478 return Data.getPointer(); 479 } 480 481 void setRaw(const RawComment *RC) { 482 Data.setPointer(RC); 483 } 484 485 const Decl *getOriginalDecl() const LLVM_READONLY { 486 return OriginalDecl; 487 } 488 489 void setOriginalDecl(const Decl *Orig) { 490 OriginalDecl = Orig; 491 } 492 493 private: 494 llvm::PointerIntPair<const RawComment *, 2, Kind> Data; 495 const Decl *OriginalDecl; 496 }; 497 498 /// \brief Mapping from declarations to comments attached to any 499 /// redeclaration. 500 /// 501 /// Raw comments are owned by Comments list. This mapping is populated 502 /// lazily. 503 mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments; 504 505 /// \brief Mapping from declarations to parsed comments attached to any 506 /// redeclaration. 507 mutable llvm::DenseMap<const Decl *, comments::FullComment *> ParsedComments; 508 509 /// \brief Return the documentation comment attached to a given declaration, 510 /// without looking into cache. 511 RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 512 513public: 514 RawCommentList &getRawCommentList() { 515 return Comments; 516 } 517 518 void addComment(const RawComment &RC) { 519 assert(LangOpts.RetainCommentsFromSystemHeaders || 520 !SourceMgr.isInSystemHeader(RC.getSourceRange().getBegin())); 521 Comments.addComment(RC, BumpAlloc); 522 } 523 524 /// \brief Return the documentation comment attached to a given declaration. 525 /// Returns NULL if no comment is attached. 526 /// 527 /// \param OriginalDecl if not NULL, is set to declaration AST node that had 528 /// the comment, if the comment we found comes from a redeclaration. 529 const RawComment *getRawCommentForAnyRedecl( 530 const Decl *D, 531 const Decl **OriginalDecl = NULL) const; 532 533 /// Return parsed documentation comment attached to a given declaration. 534 /// Returns NULL if no comment is attached. 535 /// 536 /// \param PP the Preprocessor used with this TU. Could be NULL if 537 /// preprocessor is not available. 538 comments::FullComment *getCommentForDecl(const Decl *D, 539 const Preprocessor *PP) const; 540 541 comments::FullComment *cloneFullComment(comments::FullComment *FC, 542 const Decl *D) const; 543 544private: 545 mutable comments::CommandTraits CommentCommandTraits; 546 547public: 548 comments::CommandTraits &getCommentCommandTraits() const { 549 return CommentCommandTraits; 550 } 551 552 /// \brief Retrieve the attributes for the given declaration. 553 AttrVec& getDeclAttrs(const Decl *D); 554 555 /// \brief Erase the attributes corresponding to the given declaration. 556 void eraseDeclAttrs(const Decl *D); 557 558 /// \brief If this variable is an instantiated static data member of a 559 /// class template specialization, returns the templated static data member 560 /// from which it was instantiated. 561 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 562 const VarDecl *Var); 563 564 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 565 566 void setClassScopeSpecializationPattern(FunctionDecl *FD, 567 FunctionDecl *Pattern); 568 569 /// \brief Note that the static data member \p Inst is an instantiation of 570 /// the static data member template \p Tmpl of a class template. 571 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 572 TemplateSpecializationKind TSK, 573 SourceLocation PointOfInstantiation = SourceLocation()); 574 575 /// \brief If the given using decl \p Inst is an instantiation of a 576 /// (possibly unresolved) using decl from a template instantiation, 577 /// return it. 578 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 579 580 /// \brief Remember that the using decl \p Inst is an instantiation 581 /// of the using decl \p Pattern of a class template. 582 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 583 584 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 585 UsingShadowDecl *Pattern); 586 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 587 588 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 589 590 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 591 592 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 593 /// the non-bitfield \p LastFD. 594 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 595 const FieldDecl *LastFD) const; 596 597 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 598 /// the bitfield \p LastFD. 599 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 600 const FieldDecl *LastFD) const; 601 602 /// \brief Return \c true if \p FD is a bitfield which follows the bitfield 603 /// \p LastFD. 604 bool BitfieldFollowsBitfield(const FieldDecl *FD, 605 const FieldDecl *LastFD) const; 606 607 /// \brief Return \c true if \p FD is not a bitfield which follows the 608 /// bitfield \p LastFD. 609 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 610 const FieldDecl *LastFD) const; 611 612 /// \brief Return \c true if \p FD is a bitfield which follows the 613 /// non-bitfield \p LastFD. 614 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 615 const FieldDecl *LastFD) const; 616 617 // Access to the set of methods overridden by the given C++ method. 618 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 619 overridden_cxx_method_iterator 620 overridden_methods_begin(const CXXMethodDecl *Method) const; 621 622 overridden_cxx_method_iterator 623 overridden_methods_end(const CXXMethodDecl *Method) const; 624 625 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 626 627 /// \brief Note that the given C++ \p Method overrides the given \p 628 /// Overridden method. 629 void addOverriddenMethod(const CXXMethodDecl *Method, 630 const CXXMethodDecl *Overridden); 631 632 /// \brief Return C++ or ObjC overridden methods for the given \p Method. 633 /// 634 /// An ObjC method is considered to override any method in the class's 635 /// base classes, its protocols, or its categories' protocols, that has 636 /// the same selector and is of the same kind (class or instance). 637 /// A method in an implementation is not considered as overriding the same 638 /// method in the interface or its categories. 639 void getOverriddenMethods(const NamedDecl *Method, 640 SmallVectorImpl<const NamedDecl *> &Overridden); 641 642 /// \brief Notify the AST context that a new import declaration has been 643 /// parsed or implicitly created within this translation unit. 644 void addedLocalImportDecl(ImportDecl *Import); 645 646 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 647 return Import->NextLocalImport; 648 } 649 650 /// \brief Iterator that visits import declarations. 651 class import_iterator { 652 ImportDecl *Import; 653 654 public: 655 typedef ImportDecl *value_type; 656 typedef ImportDecl *reference; 657 typedef ImportDecl *pointer; 658 typedef int difference_type; 659 typedef std::forward_iterator_tag iterator_category; 660 661 import_iterator() : Import() { } 662 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 663 664 reference operator*() const { return Import; } 665 pointer operator->() const { return Import; } 666 667 import_iterator &operator++() { 668 Import = ASTContext::getNextLocalImport(Import); 669 return *this; 670 } 671 672 import_iterator operator++(int) { 673 import_iterator Other(*this); 674 ++(*this); 675 return Other; 676 } 677 678 friend bool operator==(import_iterator X, import_iterator Y) { 679 return X.Import == Y.Import; 680 } 681 682 friend bool operator!=(import_iterator X, import_iterator Y) { 683 return X.Import != Y.Import; 684 } 685 }; 686 687 import_iterator local_import_begin() const { 688 return import_iterator(FirstLocalImport); 689 } 690 import_iterator local_import_end() const { return import_iterator(); } 691 692 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 693 694 695 // Builtin Types. 696 CanQualType VoidTy; 697 CanQualType BoolTy; 698 CanQualType CharTy; 699 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 700 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 701 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 702 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 703 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 704 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 705 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 706 CanQualType FloatTy, DoubleTy, LongDoubleTy; 707 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 708 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 709 CanQualType VoidPtrTy, NullPtrTy; 710 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 711 CanQualType BuiltinFnTy; 712 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 713 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 714 CanQualType ObjCBuiltinBoolTy; 715 716 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 717 mutable QualType AutoDeductTy; // Deduction against 'auto'. 718 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 719 720 // Type used to help define __builtin_va_list for some targets. 721 // The type is built when constructing 'BuiltinVaListDecl'. 722 mutable QualType VaListTagTy; 723 724 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 725 IdentifierTable &idents, SelectorTable &sels, 726 Builtin::Context &builtins, 727 unsigned size_reserve, 728 bool DelayInitialization = false); 729 730 ~ASTContext(); 731 732 /// \brief Attach an external AST source to the AST context. 733 /// 734 /// The external AST source provides the ability to load parts of 735 /// the abstract syntax tree as needed from some external storage, 736 /// e.g., a precompiled header. 737 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 738 739 /// \brief Retrieve a pointer to the external AST source associated 740 /// with this AST context, if any. 741 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 742 743 /// \brief Attach an AST mutation listener to the AST context. 744 /// 745 /// The AST mutation listener provides the ability to track modifications to 746 /// the abstract syntax tree entities committed after they were initially 747 /// created. 748 void setASTMutationListener(ASTMutationListener *Listener) { 749 this->Listener = Listener; 750 } 751 752 /// \brief Retrieve a pointer to the AST mutation listener associated 753 /// with this AST context, if any. 754 ASTMutationListener *getASTMutationListener() const { return Listener; } 755 756 void PrintStats() const; 757 const std::vector<Type*>& getTypes() const { return Types; } 758 759 /// \brief Retrieve the declaration for the 128-bit signed integer type. 760 TypedefDecl *getInt128Decl() const; 761 762 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 763 TypedefDecl *getUInt128Decl() const; 764 765 //===--------------------------------------------------------------------===// 766 // Type Constructors 767 //===--------------------------------------------------------------------===// 768 769private: 770 /// \brief Return a type with extended qualifiers. 771 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 772 773 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 774 775public: 776 /// \brief Return the uniqued reference to the type for an address space 777 /// qualified type with the specified type and address space. 778 /// 779 /// The resulting type has a union of the qualifiers from T and the address 780 /// space. If T already has an address space specifier, it is silently 781 /// replaced. 782 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 783 784 /// \brief Return the uniqued reference to the type for an Objective-C 785 /// gc-qualified type. 786 /// 787 /// The retulting type has a union of the qualifiers from T and the gc 788 /// attribute. 789 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 790 791 /// \brief Return the uniqued reference to the type for a \c restrict 792 /// qualified type. 793 /// 794 /// The resulting type has a union of the qualifiers from \p T and 795 /// \c restrict. 796 QualType getRestrictType(QualType T) const { 797 return T.withFastQualifiers(Qualifiers::Restrict); 798 } 799 800 /// \brief Return the uniqued reference to the type for a \c volatile 801 /// qualified type. 802 /// 803 /// The resulting type has a union of the qualifiers from \p T and 804 /// \c volatile. 805 QualType getVolatileType(QualType T) const { 806 return T.withFastQualifiers(Qualifiers::Volatile); 807 } 808 809 /// \brief Return the uniqued reference to the type for a \c const 810 /// qualified type. 811 /// 812 /// The resulting type has a union of the qualifiers from \p T and \c const. 813 /// 814 /// It can be reasonably expected that this will always be equivalent to 815 /// calling T.withConst(). 816 QualType getConstType(QualType T) const { return T.withConst(); } 817 818 /// \brief Change the ExtInfo on a function type. 819 const FunctionType *adjustFunctionType(const FunctionType *Fn, 820 FunctionType::ExtInfo EInfo); 821 822 /// \brief Return the uniqued reference to the type for a complex 823 /// number with the specified element type. 824 QualType getComplexType(QualType T) const; 825 CanQualType getComplexType(CanQualType T) const { 826 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 827 } 828 829 /// \brief Return the uniqued reference to the type for a pointer to 830 /// the specified type. 831 QualType getPointerType(QualType T) const; 832 CanQualType getPointerType(CanQualType T) const { 833 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 834 } 835 836 /// \brief Return the uniqued reference to the atomic type for the specified 837 /// type. 838 QualType getAtomicType(QualType T) const; 839 840 /// \brief Return the uniqued reference to the type for a block of the 841 /// specified type. 842 QualType getBlockPointerType(QualType T) const; 843 844 /// Gets the struct used to keep track of the descriptor for pointer to 845 /// blocks. 846 QualType getBlockDescriptorType() const; 847 848 /// Gets the struct used to keep track of the extended descriptor for 849 /// pointer to blocks. 850 QualType getBlockDescriptorExtendedType() const; 851 852 void setcudaConfigureCallDecl(FunctionDecl *FD) { 853 cudaConfigureCallDecl = FD; 854 } 855 FunctionDecl *getcudaConfigureCallDecl() { 856 return cudaConfigureCallDecl; 857 } 858 859 /// Builds the struct used for __block variables. 860 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 861 862 /// Returns true iff we need copy/dispose helpers for the given type. 863 bool BlockRequiresCopying(QualType Ty) const; 864 865 /// \brief Return the uniqued reference to the type for an lvalue reference 866 /// to the specified type. 867 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 868 const; 869 870 /// \brief Return the uniqued reference to the type for an rvalue reference 871 /// to the specified type. 872 QualType getRValueReferenceType(QualType T) const; 873 874 /// \brief Return the uniqued reference to the type for a member pointer to 875 /// the specified type in the specified class. 876 /// 877 /// The class \p Cls is a \c Type because it could be a dependent name. 878 QualType getMemberPointerType(QualType T, const Type *Cls) const; 879 880 /// \brief Return a non-unique reference to the type for a variable array of 881 /// the specified element type. 882 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 883 ArrayType::ArraySizeModifier ASM, 884 unsigned IndexTypeQuals, 885 SourceRange Brackets) const; 886 887 /// \brief Return a non-unique reference to the type for a dependently-sized 888 /// array of the specified element type. 889 /// 890 /// FIXME: We will need these to be uniqued, or at least comparable, at some 891 /// point. 892 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 893 ArrayType::ArraySizeModifier ASM, 894 unsigned IndexTypeQuals, 895 SourceRange Brackets) const; 896 897 /// \brief Return a unique reference to the type for an incomplete array of 898 /// the specified element type. 899 QualType getIncompleteArrayType(QualType EltTy, 900 ArrayType::ArraySizeModifier ASM, 901 unsigned IndexTypeQuals) const; 902 903 /// \brief Return the unique reference to the type for a constant array of 904 /// the specified element type. 905 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 906 ArrayType::ArraySizeModifier ASM, 907 unsigned IndexTypeQuals) const; 908 909 /// \brief Returns a vla type where known sizes are replaced with [*]. 910 QualType getVariableArrayDecayedType(QualType Ty) const; 911 912 /// \brief Return the unique reference to a vector type of the specified 913 /// element type and size. 914 /// 915 /// \pre \p VectorType must be a built-in type. 916 QualType getVectorType(QualType VectorType, unsigned NumElts, 917 VectorType::VectorKind VecKind) const; 918 919 /// \brief Return the unique reference to an extended vector type 920 /// of the specified element type and size. 921 /// 922 /// \pre \p VectorType must be a built-in type. 923 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 924 925 /// \pre Return a non-unique reference to the type for a dependently-sized 926 /// vector of the specified element type. 927 /// 928 /// FIXME: We will need these to be uniqued, or at least comparable, at some 929 /// point. 930 QualType getDependentSizedExtVectorType(QualType VectorType, 931 Expr *SizeExpr, 932 SourceLocation AttrLoc) const; 933 934 /// \brief Return a K&R style C function type like 'int()'. 935 QualType getFunctionNoProtoType(QualType ResultTy, 936 const FunctionType::ExtInfo &Info) const; 937 938 QualType getFunctionNoProtoType(QualType ResultTy) const { 939 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 940 } 941 942 /// \brief Return a normal function type with a typed argument list. 943 QualType getFunctionType(QualType ResultTy, 944 const QualType *Args, unsigned NumArgs, 945 const FunctionProtoType::ExtProtoInfo &EPI) const; 946 947 /// \brief Return the unique reference to the type for the specified type 948 /// declaration. 949 QualType getTypeDeclType(const TypeDecl *Decl, 950 const TypeDecl *PrevDecl = 0) const { 951 assert(Decl && "Passed null for Decl param"); 952 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 953 954 if (PrevDecl) { 955 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 956 Decl->TypeForDecl = PrevDecl->TypeForDecl; 957 return QualType(PrevDecl->TypeForDecl, 0); 958 } 959 960 return getTypeDeclTypeSlow(Decl); 961 } 962 963 /// \brief Return the unique reference to the type for the specified 964 /// typedef-name decl. 965 QualType getTypedefType(const TypedefNameDecl *Decl, 966 QualType Canon = QualType()) const; 967 968 QualType getRecordType(const RecordDecl *Decl) const; 969 970 QualType getEnumType(const EnumDecl *Decl) const; 971 972 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 973 974 QualType getAttributedType(AttributedType::Kind attrKind, 975 QualType modifiedType, 976 QualType equivalentType); 977 978 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 979 QualType Replacement) const; 980 QualType getSubstTemplateTypeParmPackType( 981 const TemplateTypeParmType *Replaced, 982 const TemplateArgument &ArgPack); 983 984 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 985 bool ParameterPack, 986 TemplateTypeParmDecl *ParmDecl = 0) const; 987 988 QualType getTemplateSpecializationType(TemplateName T, 989 const TemplateArgument *Args, 990 unsigned NumArgs, 991 QualType Canon = QualType()) const; 992 993 QualType getCanonicalTemplateSpecializationType(TemplateName T, 994 const TemplateArgument *Args, 995 unsigned NumArgs) const; 996 997 QualType getTemplateSpecializationType(TemplateName T, 998 const TemplateArgumentListInfo &Args, 999 QualType Canon = QualType()) const; 1000 1001 TypeSourceInfo * 1002 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 1003 const TemplateArgumentListInfo &Args, 1004 QualType Canon = QualType()) const; 1005 1006 QualType getParenType(QualType NamedType) const; 1007 1008 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1009 NestedNameSpecifier *NNS, 1010 QualType NamedType) const; 1011 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 1012 NestedNameSpecifier *NNS, 1013 const IdentifierInfo *Name, 1014 QualType Canon = QualType()) const; 1015 1016 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1017 NestedNameSpecifier *NNS, 1018 const IdentifierInfo *Name, 1019 const TemplateArgumentListInfo &Args) const; 1020 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1021 NestedNameSpecifier *NNS, 1022 const IdentifierInfo *Name, 1023 unsigned NumArgs, 1024 const TemplateArgument *Args) const; 1025 1026 QualType getPackExpansionType(QualType Pattern, 1027 llvm::Optional<unsigned> NumExpansions); 1028 1029 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1030 ObjCInterfaceDecl *PrevDecl = 0) const; 1031 1032 QualType getObjCObjectType(QualType Base, 1033 ObjCProtocolDecl * const *Protocols, 1034 unsigned NumProtocols) const; 1035 1036 /// \brief Return a ObjCObjectPointerType type for the given ObjCObjectType. 1037 QualType getObjCObjectPointerType(QualType OIT) const; 1038 1039 /// \brief GCC extension. 1040 QualType getTypeOfExprType(Expr *e) const; 1041 QualType getTypeOfType(QualType t) const; 1042 1043 /// \brief C++11 decltype. 1044 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 1045 1046 /// \brief Unary type transforms 1047 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 1048 UnaryTransformType::UTTKind UKind) const; 1049 1050 /// \brief C++11 deduced auto type. 1051 QualType getAutoType(QualType DeducedType) const; 1052 1053 /// \brief C++11 deduction pattern for 'auto' type. 1054 QualType getAutoDeductType() const; 1055 1056 /// \brief C++11 deduction pattern for 'auto &&' type. 1057 QualType getAutoRRefDeductType() const; 1058 1059 /// \brief Return the unique reference to the type for the specified TagDecl 1060 /// (struct/union/class/enum) decl. 1061 QualType getTagDeclType(const TagDecl *Decl) const; 1062 1063 /// \brief Return the unique type for "size_t" (C99 7.17), defined in 1064 /// <stddef.h>. 1065 /// 1066 /// The sizeof operator requires this (C99 6.5.3.4p4). 1067 CanQualType getSizeType() const; 1068 1069 /// \brief Return the unique type for "intmax_t" (C99 7.18.1.5), defined in 1070 /// <stdint.h>. 1071 CanQualType getIntMaxType() const; 1072 1073 /// \brief Return the unique type for "uintmax_t" (C99 7.18.1.5), defined in 1074 /// <stdint.h>. 1075 CanQualType getUIntMaxType() const; 1076 1077 /// \brief In C++, this returns the unique wchar_t type. In C99, this 1078 /// returns a type compatible with the type defined in <stddef.h> as defined 1079 /// by the target. 1080 QualType getWCharType() const { return WCharTy; } 1081 1082 /// \brief Return the type of "signed wchar_t". 1083 /// 1084 /// Used when in C++, as a GCC extension. 1085 QualType getSignedWCharType() const; 1086 1087 /// \brief Return the type of "unsigned wchar_t". 1088 /// 1089 /// Used when in C++, as a GCC extension. 1090 QualType getUnsignedWCharType() const; 1091 1092 /// \brief In C99, this returns a type compatible with the type 1093 /// defined in <stddef.h> as defined by the target. 1094 QualType getWIntType() const { return WIntTy; } 1095 1096 /// \brief Return the unique type for "ptrdiff_t" (C99 7.17) defined in 1097 /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1098 QualType getPointerDiffType() const; 1099 1100 /// \brief Return the C structure type used to represent constant CFStrings. 1101 QualType getCFConstantStringType() const; 1102 1103 /// Get the structure type used to representation CFStrings, or NULL 1104 /// if it hasn't yet been built. 1105 QualType getRawCFConstantStringType() const { 1106 if (CFConstantStringTypeDecl) 1107 return getTagDeclType(CFConstantStringTypeDecl); 1108 return QualType(); 1109 } 1110 void setCFConstantStringType(QualType T); 1111 1112 // This setter/getter represents the ObjC type for an NSConstantString. 1113 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 1114 QualType getObjCConstantStringInterface() const { 1115 return ObjCConstantStringType; 1116 } 1117 1118 QualType getObjCNSStringType() const { 1119 return ObjCNSStringType; 1120 } 1121 1122 void setObjCNSStringType(QualType T) { 1123 ObjCNSStringType = T; 1124 } 1125 1126 /// \brief Retrieve the type that \c id has been defined to, which may be 1127 /// different from the built-in \c id if \c id has been typedef'd. 1128 QualType getObjCIdRedefinitionType() const { 1129 if (ObjCIdRedefinitionType.isNull()) 1130 return getObjCIdType(); 1131 return ObjCIdRedefinitionType; 1132 } 1133 1134 /// \brief Set the user-written type that redefines \c id. 1135 void setObjCIdRedefinitionType(QualType RedefType) { 1136 ObjCIdRedefinitionType = RedefType; 1137 } 1138 1139 /// \brief Retrieve the type that \c Class has been defined to, which may be 1140 /// different from the built-in \c Class if \c Class has been typedef'd. 1141 QualType getObjCClassRedefinitionType() const { 1142 if (ObjCClassRedefinitionType.isNull()) 1143 return getObjCClassType(); 1144 return ObjCClassRedefinitionType; 1145 } 1146 1147 /// \brief Set the user-written type that redefines 'SEL'. 1148 void setObjCClassRedefinitionType(QualType RedefType) { 1149 ObjCClassRedefinitionType = RedefType; 1150 } 1151 1152 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1153 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1154 QualType getObjCSelRedefinitionType() const { 1155 if (ObjCSelRedefinitionType.isNull()) 1156 return getObjCSelType(); 1157 return ObjCSelRedefinitionType; 1158 } 1159 1160 1161 /// \brief Set the user-written type that redefines 'SEL'. 1162 void setObjCSelRedefinitionType(QualType RedefType) { 1163 ObjCSelRedefinitionType = RedefType; 1164 } 1165 1166 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1167 /// otherwise, returns a NULL type; 1168 QualType getObjCInstanceType() { 1169 return getTypeDeclType(getObjCInstanceTypeDecl()); 1170 } 1171 1172 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1173 /// "instancetype" type. 1174 TypedefDecl *getObjCInstanceTypeDecl(); 1175 1176 /// \brief Set the type for the C FILE type. 1177 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1178 1179 /// \brief Retrieve the C FILE type. 1180 QualType getFILEType() const { 1181 if (FILEDecl) 1182 return getTypeDeclType(FILEDecl); 1183 return QualType(); 1184 } 1185 1186 /// \brief Set the type for the C jmp_buf type. 1187 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1188 this->jmp_bufDecl = jmp_bufDecl; 1189 } 1190 1191 /// \brief Retrieve the C jmp_buf type. 1192 QualType getjmp_bufType() const { 1193 if (jmp_bufDecl) 1194 return getTypeDeclType(jmp_bufDecl); 1195 return QualType(); 1196 } 1197 1198 /// \brief Set the type for the C sigjmp_buf type. 1199 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1200 this->sigjmp_bufDecl = sigjmp_bufDecl; 1201 } 1202 1203 /// \brief Retrieve the C sigjmp_buf type. 1204 QualType getsigjmp_bufType() const { 1205 if (sigjmp_bufDecl) 1206 return getTypeDeclType(sigjmp_bufDecl); 1207 return QualType(); 1208 } 1209 1210 /// \brief Set the type for the C ucontext_t type. 1211 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1212 this->ucontext_tDecl = ucontext_tDecl; 1213 } 1214 1215 /// \brief Retrieve the C ucontext_t type. 1216 QualType getucontext_tType() const { 1217 if (ucontext_tDecl) 1218 return getTypeDeclType(ucontext_tDecl); 1219 return QualType(); 1220 } 1221 1222 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1223 QualType getLogicalOperationType() const { 1224 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1225 } 1226 1227 /// \brief Emit the Objective-CC type encoding for the given type \p T into 1228 /// \p S. 1229 /// 1230 /// If \p Field is specified then record field names are also encoded. 1231 void getObjCEncodingForType(QualType T, std::string &S, 1232 const FieldDecl *Field=0) const; 1233 1234 void getLegacyIntegralTypeEncoding(QualType &t) const; 1235 1236 /// \brief Put the string version of the type qualifiers \p QT into \p S. 1237 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1238 std::string &S) const; 1239 1240 /// \brief Emit the encoded type for the function \p Decl into \p S. 1241 /// 1242 /// This is in the same format as Objective-C method encodings. 1243 /// 1244 /// \returns true if an error occurred (e.g., because one of the parameter 1245 /// types is incomplete), false otherwise. 1246 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1247 1248 /// \brief Emit the encoded type for the method declaration \p Decl into 1249 /// \p S. 1250 /// 1251 /// \returns true if an error occurred (e.g., because one of the parameter 1252 /// types is incomplete), false otherwise. 1253 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1254 bool Extended = false) 1255 const; 1256 1257 /// \brief Return the encoded type for this block declaration. 1258 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1259 1260 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1261 /// this method declaration. If non-NULL, Container must be either 1262 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1263 /// only be NULL when getting encodings for protocol properties. 1264 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1265 const Decl *Container, 1266 std::string &S) const; 1267 1268 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1269 ObjCProtocolDecl *rProto) const; 1270 1271 /// \brief Return the size of type \p T for Objective-C encoding purpose, 1272 /// in characters. 1273 CharUnits getObjCEncodingTypeSize(QualType T) const; 1274 1275 /// \brief Retrieve the typedef corresponding to the predefined \c id type 1276 /// in Objective-C. 1277 TypedefDecl *getObjCIdDecl() const; 1278 1279 /// \brief Represents the Objective-CC \c id type. 1280 /// 1281 /// This is set up lazily, by Sema. \c id is always a (typedef for a) 1282 /// pointer type, a pointer to a struct. 1283 QualType getObjCIdType() const { 1284 return getTypeDeclType(getObjCIdDecl()); 1285 } 1286 1287 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1288 /// in Objective-C. 1289 TypedefDecl *getObjCSelDecl() const; 1290 1291 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1292 /// 'SEL' type. 1293 QualType getObjCSelType() const { 1294 return getTypeDeclType(getObjCSelDecl()); 1295 } 1296 1297 /// \brief Retrieve the typedef declaration corresponding to the predefined 1298 /// Objective-C 'Class' type. 1299 TypedefDecl *getObjCClassDecl() const; 1300 1301 /// \brief Represents the Objective-C \c Class type. 1302 /// 1303 /// This is set up lazily, by Sema. \c Class is always a (typedef for a) 1304 /// pointer type, a pointer to a struct. 1305 QualType getObjCClassType() const { 1306 return getTypeDeclType(getObjCClassDecl()); 1307 } 1308 1309 /// \brief Retrieve the Objective-C class declaration corresponding to 1310 /// the predefined \c Protocol class. 1311 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1312 1313 /// \brief Retrieve declaration of 'BOOL' typedef 1314 TypedefDecl *getBOOLDecl() const { 1315 return BOOLDecl; 1316 } 1317 1318 /// \brief Save declaration of 'BOOL' typedef 1319 void setBOOLDecl(TypedefDecl *TD) { 1320 BOOLDecl = TD; 1321 } 1322 1323 /// \brief type of 'BOOL' type. 1324 QualType getBOOLType() const { 1325 return getTypeDeclType(getBOOLDecl()); 1326 } 1327 1328 /// \brief Retrieve the type of the Objective-C \c Protocol class. 1329 QualType getObjCProtoType() const { 1330 return getObjCInterfaceType(getObjCProtocolDecl()); 1331 } 1332 1333 /// \brief Retrieve the C type declaration corresponding to the predefined 1334 /// \c __builtin_va_list type. 1335 TypedefDecl *getBuiltinVaListDecl() const; 1336 1337 /// \brief Retrieve the type of the \c __builtin_va_list type. 1338 QualType getBuiltinVaListType() const { 1339 return getTypeDeclType(getBuiltinVaListDecl()); 1340 } 1341 1342 /// \brief Retrieve the C type declaration corresponding to the predefined 1343 /// \c __va_list_tag type used to help define the \c __builtin_va_list type 1344 /// for some targets. 1345 QualType getVaListTagType() const; 1346 1347 /// \brief Return a type with additional \c const, \c volatile, or 1348 /// \c restrict qualifiers. 1349 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1350 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1351 } 1352 1353 /// \brief Un-split a SplitQualType. 1354 QualType getQualifiedType(SplitQualType split) const { 1355 return getQualifiedType(split.Ty, split.Quals); 1356 } 1357 1358 /// \brief Return a type with additional qualifiers. 1359 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1360 if (!Qs.hasNonFastQualifiers()) 1361 return T.withFastQualifiers(Qs.getFastQualifiers()); 1362 QualifierCollector Qc(Qs); 1363 const Type *Ptr = Qc.strip(T); 1364 return getExtQualType(Ptr, Qc); 1365 } 1366 1367 /// \brief Return a type with additional qualifiers. 1368 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1369 if (!Qs.hasNonFastQualifiers()) 1370 return QualType(T, Qs.getFastQualifiers()); 1371 return getExtQualType(T, Qs); 1372 } 1373 1374 /// \brief Return a type with the given lifetime qualifier. 1375 /// 1376 /// \pre Neither type.ObjCLifetime() nor \p lifetime may be \c OCL_None. 1377 QualType getLifetimeQualifiedType(QualType type, 1378 Qualifiers::ObjCLifetime lifetime) { 1379 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1380 assert(lifetime != Qualifiers::OCL_None); 1381 1382 Qualifiers qs; 1383 qs.addObjCLifetime(lifetime); 1384 return getQualifiedType(type, qs); 1385 } 1386 1387 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1388 SourceLocation NameLoc) const; 1389 1390 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1391 UnresolvedSetIterator End) const; 1392 1393 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1394 bool TemplateKeyword, 1395 TemplateDecl *Template) const; 1396 1397 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1398 const IdentifierInfo *Name) const; 1399 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1400 OverloadedOperatorKind Operator) const; 1401 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1402 TemplateName replacement) const; 1403 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1404 const TemplateArgument &ArgPack) const; 1405 1406 enum GetBuiltinTypeError { 1407 GE_None, ///< No error 1408 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1409 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1410 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1411 }; 1412 1413 /// \brief Return the type for the specified builtin. 1414 /// 1415 /// If \p IntegerConstantArgs is non-null, it is filled in with a bitmask of 1416 /// arguments to the builtin that are required to be integer constant 1417 /// expressions. 1418 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1419 unsigned *IntegerConstantArgs = 0) const; 1420 1421private: 1422 CanQualType getFromTargetType(unsigned Type) const; 1423 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1424 1425 //===--------------------------------------------------------------------===// 1426 // Type Predicates. 1427 //===--------------------------------------------------------------------===// 1428 1429public: 1430 /// \brief Return one of the GCNone, Weak or Strong Objective-C garbage 1431 /// collection attributes. 1432 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1433 1434 /// \brief Return true if the given vector types are of the same unqualified 1435 /// type or if they are equivalent to the same GCC vector type. 1436 /// 1437 /// \note This ignores whether they are target-specific (AltiVec or Neon) 1438 /// types. 1439 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1440 1441 /// \brief Return true if this is an \c NSObject object with its \c NSObject 1442 /// attribute set. 1443 static bool isObjCNSObjectType(QualType Ty) { 1444 return Ty->isObjCNSObjectType(); 1445 } 1446 1447 //===--------------------------------------------------------------------===// 1448 // Type Sizing and Analysis 1449 //===--------------------------------------------------------------------===// 1450 1451 /// \brief Return the APFloat 'semantics' for the specified scalar floating 1452 /// point type. 1453 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1454 1455 /// \brief Get the size and alignment of the specified complete type in bits. 1456 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1457 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1458 return getTypeInfo(T.getTypePtr()); 1459 } 1460 1461 /// \brief Return the size of the specified (complete) type \p T, in bits. 1462 uint64_t getTypeSize(QualType T) const { 1463 return getTypeInfo(T).first; 1464 } 1465 uint64_t getTypeSize(const Type *T) const { 1466 return getTypeInfo(T).first; 1467 } 1468 1469 /// \brief Return the size of the character type, in bits. 1470 uint64_t getCharWidth() const { 1471 return getTypeSize(CharTy); 1472 } 1473 1474 /// \brief Convert a size in bits to a size in characters. 1475 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1476 1477 /// \brief Convert a size in characters to a size in bits. 1478 int64_t toBits(CharUnits CharSize) const; 1479 1480 /// \brief Return the size of the specified (complete) type \p T, in 1481 /// characters. 1482 CharUnits getTypeSizeInChars(QualType T) const; 1483 CharUnits getTypeSizeInChars(const Type *T) const; 1484 1485 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1486 /// bits. 1487 unsigned getTypeAlign(QualType T) const { 1488 return getTypeInfo(T).second; 1489 } 1490 unsigned getTypeAlign(const Type *T) const { 1491 return getTypeInfo(T).second; 1492 } 1493 1494 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1495 /// characters. 1496 CharUnits getTypeAlignInChars(QualType T) const; 1497 CharUnits getTypeAlignInChars(const Type *T) const; 1498 1499 // getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the 1500 // type is a record, its data size is returned. 1501 std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const; 1502 1503 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1504 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1505 1506 /// \brief Return the "preferred" alignment of the specified type \p T for 1507 /// the current target, in bits. 1508 /// 1509 /// This can be different than the ABI alignment in cases where it is 1510 /// beneficial for performance to overalign a data type. 1511 unsigned getPreferredTypeAlign(const Type *T) const; 1512 1513 /// \brief Return a conservative estimate of the alignment of the specified 1514 /// decl \p D. 1515 /// 1516 /// \pre \p D must not be a bitfield type, as bitfields do not have a valid 1517 /// alignment. 1518 /// 1519 /// If \p RefAsPointee, references are treated like their underlying type 1520 /// (for alignof), else they're treated like pointers (for CodeGen). 1521 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1522 1523 /// \brief Get or compute information about the layout of the specified 1524 /// record (struct/union/class) \p D, which indicates its size and field 1525 /// position information. 1526 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1527 1528 /// \brief Get or compute information about the layout of the specified 1529 /// Objective-C interface. 1530 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1531 const; 1532 1533 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1534 bool Simple = false) const; 1535 1536 /// \brief Get or compute information about the layout of the specified 1537 /// Objective-C implementation. 1538 /// 1539 /// This may differ from the interface if synthesized ivars are present. 1540 const ASTRecordLayout & 1541 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1542 1543 /// \brief Get the key function for the given record decl, or NULL if there 1544 /// isn't one. 1545 /// 1546 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 1547 /// 1548 /// ...the first non-pure virtual function that is not inline at the point 1549 /// of class definition. 1550 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1551 1552 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1553 uint64_t getFieldOffset(const ValueDecl *FD) const; 1554 1555 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1556 1557 MangleContext *createMangleContext(); 1558 1559 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1560 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1561 1562 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1563 void CollectInheritedProtocols(const Decl *CDecl, 1564 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1565 1566 //===--------------------------------------------------------------------===// 1567 // Type Operators 1568 //===--------------------------------------------------------------------===// 1569 1570 /// \brief Return the canonical (structural) type corresponding to the 1571 /// specified potentially non-canonical type \p T. 1572 /// 1573 /// The non-canonical version of a type may have many "decorated" versions of 1574 /// types. Decorators can include typedefs, 'typeof' operators, etc. The 1575 /// returned type is guaranteed to be free of any of these, allowing two 1576 /// canonical types to be compared for exact equality with a simple pointer 1577 /// comparison. 1578 CanQualType getCanonicalType(QualType T) const { 1579 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1580 } 1581 1582 const Type *getCanonicalType(const Type *T) const { 1583 return T->getCanonicalTypeInternal().getTypePtr(); 1584 } 1585 1586 /// \brief Return the canonical parameter type corresponding to the specific 1587 /// potentially non-canonical one. 1588 /// 1589 /// Qualifiers are stripped off, functions are turned into function 1590 /// pointers, and arrays decay one level into pointers. 1591 CanQualType getCanonicalParamType(QualType T) const; 1592 1593 /// \brief Determine whether the given types \p T1 and \p T2 are equivalent. 1594 bool hasSameType(QualType T1, QualType T2) const { 1595 return getCanonicalType(T1) == getCanonicalType(T2); 1596 } 1597 1598 /// \brief Return this type as a completely-unqualified array type, 1599 /// capturing the qualifiers in \p Quals. 1600 /// 1601 /// This will remove the minimal amount of sugaring from the types, similar 1602 /// to the behavior of QualType::getUnqualifiedType(). 1603 /// 1604 /// \param T is the qualified type, which may be an ArrayType 1605 /// 1606 /// \param Quals will receive the full set of qualifiers that were 1607 /// applied to the array. 1608 /// 1609 /// \returns if this is an array type, the completely unqualified array type 1610 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1611 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1612 1613 /// \brief Determine whether the given types are equivalent after 1614 /// cvr-qualifiers have been removed. 1615 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1616 return getCanonicalType(T1).getTypePtr() == 1617 getCanonicalType(T2).getTypePtr(); 1618 } 1619 1620 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1621 1622 /// \brief Retrieves the "canonical" nested name specifier for a 1623 /// given nested name specifier. 1624 /// 1625 /// The canonical nested name specifier is a nested name specifier 1626 /// that uniquely identifies a type or namespace within the type 1627 /// system. For example, given: 1628 /// 1629 /// \code 1630 /// namespace N { 1631 /// struct S { 1632 /// template<typename T> struct X { typename T* type; }; 1633 /// }; 1634 /// } 1635 /// 1636 /// template<typename T> struct Y { 1637 /// typename N::S::X<T>::type member; 1638 /// }; 1639 /// \endcode 1640 /// 1641 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1642 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1643 /// by declarations in the type system and the canonical type for 1644 /// the template type parameter 'T' is template-param-0-0. 1645 NestedNameSpecifier * 1646 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1647 1648 /// \brief Retrieves the default calling convention to use for 1649 /// C++ instance methods. 1650 CallingConv getDefaultCXXMethodCallConv(bool isVariadic); 1651 1652 /// \brief Retrieves the canonical representation of the given 1653 /// calling convention. 1654 CallingConv getCanonicalCallConv(CallingConv CC) const; 1655 1656 /// \brief Determines whether two calling conventions name the same 1657 /// calling convention. 1658 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1659 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1660 } 1661 1662 /// \brief Retrieves the "canonical" template name that refers to a 1663 /// given template. 1664 /// 1665 /// The canonical template name is the simplest expression that can 1666 /// be used to refer to a given template. For most templates, this 1667 /// expression is just the template declaration itself. For example, 1668 /// the template std::vector can be referred to via a variety of 1669 /// names---std::vector, \::std::vector, vector (if vector is in 1670 /// scope), etc.---but all of these names map down to the same 1671 /// TemplateDecl, which is used to form the canonical template name. 1672 /// 1673 /// Dependent template names are more interesting. Here, the 1674 /// template name could be something like T::template apply or 1675 /// std::allocator<T>::template rebind, where the nested name 1676 /// specifier itself is dependent. In this case, the canonical 1677 /// template name uses the shortest form of the dependent 1678 /// nested-name-specifier, which itself contains all canonical 1679 /// types, values, and templates. 1680 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1681 1682 /// \brief Determine whether the given template names refer to the same 1683 /// template. 1684 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1685 1686 /// \brief Retrieve the "canonical" template argument. 1687 /// 1688 /// The canonical template argument is the simplest template argument 1689 /// (which may be a type, value, expression, or declaration) that 1690 /// expresses the value of the argument. 1691 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1692 const; 1693 1694 /// Type Query functions. If the type is an instance of the specified class, 1695 /// return the Type pointer for the underlying maximally pretty type. This 1696 /// is a member of ASTContext because this may need to do some amount of 1697 /// canonicalization, e.g. to move type qualifiers into the element type. 1698 const ArrayType *getAsArrayType(QualType T) const; 1699 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1700 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1701 } 1702 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1703 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1704 } 1705 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1706 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1707 } 1708 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1709 const { 1710 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1711 } 1712 1713 /// \brief Return the innermost element type of an array type. 1714 /// 1715 /// For example, will return "int" for int[m][n] 1716 QualType getBaseElementType(const ArrayType *VAT) const; 1717 1718 /// \brief Return the innermost element type of a type (which needn't 1719 /// actually be an array type). 1720 QualType getBaseElementType(QualType QT) const; 1721 1722 /// \brief Return number of constant array elements. 1723 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1724 1725 /// \brief Perform adjustment on the parameter type of a function. 1726 /// 1727 /// This routine adjusts the given parameter type @p T to the actual 1728 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1729 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1730 QualType getAdjustedParameterType(QualType T) const; 1731 1732 /// \brief Retrieve the parameter type as adjusted for use in the signature 1733 /// of a function, decaying array and function types and removing top-level 1734 /// cv-qualifiers. 1735 QualType getSignatureParameterType(QualType T) const; 1736 1737 /// \brief Return the properly qualified result of decaying the specified 1738 /// array type to a pointer. 1739 /// 1740 /// This operation is non-trivial when handling typedefs etc. The canonical 1741 /// type of \p T must be an array type, this returns a pointer to a properly 1742 /// qualified element of the array. 1743 /// 1744 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1745 QualType getArrayDecayedType(QualType T) const; 1746 1747 /// \brief Return the type that \p PromotableType will promote to: C99 1748 /// 6.3.1.1p2, assuming that \p PromotableType is a promotable integer type. 1749 QualType getPromotedIntegerType(QualType PromotableType) const; 1750 1751 /// \brief Recurses in pointer/array types until it finds an Objective-C 1752 /// retainable type and returns its ownership. 1753 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1754 1755 /// \brief Whether this is a promotable bitfield reference according 1756 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1757 /// 1758 /// \returns the type this bit-field will promote to, or NULL if no 1759 /// promotion occurs. 1760 QualType isPromotableBitField(Expr *E) const; 1761 1762 /// \brief Return the highest ranked integer type, see C99 6.3.1.8p1. 1763 /// 1764 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1765 /// \p LHS < \p RHS, return -1. 1766 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1767 1768 /// \brief Compare the rank of the two specified floating point types, 1769 /// ignoring the domain of the type (i.e. 'double' == '_Complex double'). 1770 /// 1771 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1772 /// \p LHS < \p RHS, return -1. 1773 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1774 1775 /// \brief Return a real floating point or a complex type (based on 1776 /// \p typeDomain/\p typeSize). 1777 /// 1778 /// \param typeDomain a real floating point or complex type. 1779 /// \param typeSize a real floating point or complex type. 1780 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1781 QualType typeDomain) const; 1782 1783 unsigned getTargetAddressSpace(QualType T) const { 1784 return getTargetAddressSpace(T.getQualifiers()); 1785 } 1786 1787 unsigned getTargetAddressSpace(Qualifiers Q) const { 1788 return getTargetAddressSpace(Q.getAddressSpace()); 1789 } 1790 1791 unsigned getTargetAddressSpace(unsigned AS) const { 1792 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1793 return AS; 1794 else 1795 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1796 } 1797 1798private: 1799 // Helper for integer ordering 1800 unsigned getIntegerRank(const Type *T) const; 1801 1802public: 1803 1804 //===--------------------------------------------------------------------===// 1805 // Type Compatibility Predicates 1806 //===--------------------------------------------------------------------===// 1807 1808 /// Compatibility predicates used to check assignment expressions. 1809 bool typesAreCompatible(QualType T1, QualType T2, 1810 bool CompareUnqualified = false); // C99 6.2.7p1 1811 1812 bool propertyTypesAreCompatible(QualType, QualType); 1813 bool typesAreBlockPointerCompatible(QualType, QualType); 1814 1815 bool isObjCIdType(QualType T) const { 1816 return T == getObjCIdType(); 1817 } 1818 bool isObjCClassType(QualType T) const { 1819 return T == getObjCClassType(); 1820 } 1821 bool isObjCSelType(QualType T) const { 1822 return T == getObjCSelType(); 1823 } 1824 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1825 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1826 bool ForCompare); 1827 1828 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1829 1830 // Check the safety of assignment from LHS to RHS 1831 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1832 const ObjCObjectPointerType *RHSOPT); 1833 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1834 const ObjCObjectType *RHS); 1835 bool canAssignObjCInterfacesInBlockPointer( 1836 const ObjCObjectPointerType *LHSOPT, 1837 const ObjCObjectPointerType *RHSOPT, 1838 bool BlockReturnType); 1839 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1840 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1841 const ObjCObjectPointerType *RHSOPT); 1842 bool canBindObjCObjectType(QualType To, QualType From); 1843 1844 // Functions for calculating composite types 1845 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1846 bool Unqualified = false, bool BlockReturnType = false); 1847 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1848 bool Unqualified = false); 1849 QualType mergeFunctionArgumentTypes(QualType, QualType, 1850 bool OfBlockPointer=false, 1851 bool Unqualified = false); 1852 QualType mergeTransparentUnionType(QualType, QualType, 1853 bool OfBlockPointer=false, 1854 bool Unqualified = false); 1855 1856 QualType mergeObjCGCQualifiers(QualType, QualType); 1857 1858 bool FunctionTypesMatchOnNSConsumedAttrs( 1859 const FunctionProtoType *FromFunctionType, 1860 const FunctionProtoType *ToFunctionType); 1861 1862 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1863 ObjCLayouts[CD] = 0; 1864 } 1865 1866 //===--------------------------------------------------------------------===// 1867 // Integer Predicates 1868 //===--------------------------------------------------------------------===// 1869 1870 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1871 // of bits in an integer type excluding any padding bits. 1872 unsigned getIntWidth(QualType T) const; 1873 1874 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1875 // unsigned integer type. This method takes a signed type, and returns the 1876 // corresponding unsigned integer type. 1877 QualType getCorrespondingUnsignedType(QualType T) const; 1878 1879 //===--------------------------------------------------------------------===// 1880 // Type Iterators. 1881 //===--------------------------------------------------------------------===// 1882 1883 typedef std::vector<Type*>::iterator type_iterator; 1884 typedef std::vector<Type*>::const_iterator const_type_iterator; 1885 1886 type_iterator types_begin() { return Types.begin(); } 1887 type_iterator types_end() { return Types.end(); } 1888 const_type_iterator types_begin() const { return Types.begin(); } 1889 const_type_iterator types_end() const { return Types.end(); } 1890 1891 //===--------------------------------------------------------------------===// 1892 // Integer Values 1893 //===--------------------------------------------------------------------===// 1894 1895 /// \brief Make an APSInt of the appropriate width and signedness for the 1896 /// given \p Value and integer \p Type. 1897 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1898 llvm::APSInt Res(getIntWidth(Type), 1899 !Type->isSignedIntegerOrEnumerationType()); 1900 Res = Value; 1901 return Res; 1902 } 1903 1904 bool isSentinelNullExpr(const Expr *E); 1905 1906 /// \brief Get the implementation of the ObjCInterfaceDecl \p D, or NULL if 1907 /// none exists. 1908 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1909 /// \brief Get the implementation of the ObjCCategoryDecl \p D, or NULL if 1910 /// none exists. 1911 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1912 1913 /// \brief Return true if there is at least one \@implementation in the TU. 1914 bool AnyObjCImplementation() { 1915 return !ObjCImpls.empty(); 1916 } 1917 1918 /// \brief Set the implementation of ObjCInterfaceDecl. 1919 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1920 ObjCImplementationDecl *ImplD); 1921 /// \brief Set the implementation of ObjCCategoryDecl. 1922 void setObjCImplementation(ObjCCategoryDecl *CatD, 1923 ObjCCategoryImplDecl *ImplD); 1924 1925 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1926 /// interface, or null if none exists. 1927 const ObjCMethodDecl *getObjCMethodRedeclaration( 1928 const ObjCMethodDecl *MD) const { 1929 return ObjCMethodRedecls.lookup(MD); 1930 } 1931 1932 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1933 const ObjCMethodDecl *Redecl) { 1934 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 1935 ObjCMethodRedecls[MD] = Redecl; 1936 } 1937 1938 /// \brief Returns the Objective-C interface that \p ND belongs to if it is 1939 /// an Objective-C method/property/ivar etc. that is part of an interface, 1940 /// otherwise returns null. 1941 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1942 1943 /// \brief Set the copy inialization expression of a block var decl. 1944 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1945 /// \brief Get the copy initialization expression of the VarDecl \p VD, or 1946 /// NULL if none exists. 1947 Expr *getBlockVarCopyInits(const VarDecl* VD); 1948 1949 /// \brief Allocate an uninitialized TypeSourceInfo. 1950 /// 1951 /// The caller should initialize the memory held by TypeSourceInfo using 1952 /// the TypeLoc wrappers. 1953 /// 1954 /// \param T the type that will be the basis for type source info. This type 1955 /// should refer to how the declarator was written in source code, not to 1956 /// what type semantic analysis resolved the declarator to. 1957 /// 1958 /// \param Size the size of the type info to create, or 0 if the size 1959 /// should be calculated based on the type. 1960 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1961 1962 /// \brief Allocate a TypeSourceInfo where all locations have been 1963 /// initialized to a given location, which defaults to the empty 1964 /// location. 1965 TypeSourceInfo * 1966 getTrivialTypeSourceInfo(QualType T, 1967 SourceLocation Loc = SourceLocation()) const; 1968 1969 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1970 1971 /// \brief Add a deallocation callback that will be invoked when the 1972 /// ASTContext is destroyed. 1973 /// 1974 /// \param Callback A callback function that will be invoked on destruction. 1975 /// 1976 /// \param Data Pointer data that will be provided to the callback function 1977 /// when it is called. 1978 void AddDeallocation(void (*Callback)(void*), void *Data); 1979 1980 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1981 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1982 1983 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1984 /// lazily, only when used; this is only relevant for function or file scoped 1985 /// var definitions. 1986 /// 1987 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1988 /// it is not used. 1989 bool DeclMustBeEmitted(const Decl *D); 1990 1991 /// \brief Retrieve the lambda mangling number for a lambda expression. 1992 unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator); 1993 1994 /// \brief Used by ParmVarDecl to store on the side the 1995 /// index of the parameter when it exceeds the size of the normal bitfield. 1996 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1997 1998 /// \brief Used by ParmVarDecl to retrieve on the side the 1999 /// index of the parameter when it exceeds the size of the normal bitfield. 2000 unsigned getParameterIndex(const ParmVarDecl *D) const; 2001 2002 //===--------------------------------------------------------------------===// 2003 // Statistics 2004 //===--------------------------------------------------------------------===// 2005 2006 /// \brief The number of implicitly-declared default constructors. 2007 static unsigned NumImplicitDefaultConstructors; 2008 2009 /// \brief The number of implicitly-declared default constructors for 2010 /// which declarations were built. 2011 static unsigned NumImplicitDefaultConstructorsDeclared; 2012 2013 /// \brief The number of implicitly-declared copy constructors. 2014 static unsigned NumImplicitCopyConstructors; 2015 2016 /// \brief The number of implicitly-declared copy constructors for 2017 /// which declarations were built. 2018 static unsigned NumImplicitCopyConstructorsDeclared; 2019 2020 /// \brief The number of implicitly-declared move constructors. 2021 static unsigned NumImplicitMoveConstructors; 2022 2023 /// \brief The number of implicitly-declared move constructors for 2024 /// which declarations were built. 2025 static unsigned NumImplicitMoveConstructorsDeclared; 2026 2027 /// \brief The number of implicitly-declared copy assignment operators. 2028 static unsigned NumImplicitCopyAssignmentOperators; 2029 2030 /// \brief The number of implicitly-declared copy assignment operators for 2031 /// which declarations were built. 2032 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 2033 2034 /// \brief The number of implicitly-declared move assignment operators. 2035 static unsigned NumImplicitMoveAssignmentOperators; 2036 2037 /// \brief The number of implicitly-declared move assignment operators for 2038 /// which declarations were built. 2039 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 2040 2041 /// \brief The number of implicitly-declared destructors. 2042 static unsigned NumImplicitDestructors; 2043 2044 /// \brief The number of implicitly-declared destructors for which 2045 /// declarations were built. 2046 static unsigned NumImplicitDestructorsDeclared; 2047 2048private: 2049 ASTContext(const ASTContext &) LLVM_DELETED_FUNCTION; 2050 void operator=(const ASTContext &) LLVM_DELETED_FUNCTION; 2051 2052public: 2053 /// \brief Initialize built-in types. 2054 /// 2055 /// This routine may only be invoked once for a given ASTContext object. 2056 /// It is normally invoked by the ASTContext constructor. However, the 2057 /// constructor can be asked to delay initialization, which places the burden 2058 /// of calling this function on the user of that object. 2059 /// 2060 /// \param Target The target 2061 void InitBuiltinTypes(const TargetInfo &Target); 2062 2063private: 2064 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 2065 2066 // Return the Objective-C type encoding for a given type. 2067 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 2068 bool ExpandPointedToStructures, 2069 bool ExpandStructures, 2070 const FieldDecl *Field, 2071 bool OutermostType = false, 2072 bool EncodingProperty = false, 2073 bool StructField = false, 2074 bool EncodeBlockParameters = false, 2075 bool EncodeClassNames = false) const; 2076 2077 // Adds the encoding of the structure's members. 2078 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 2079 const FieldDecl *Field, 2080 bool includeVBases = true) const; 2081 2082 // Adds the encoding of a method parameter or return type. 2083 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 2084 QualType T, std::string& S, 2085 bool Extended) const; 2086 2087 const ASTRecordLayout & 2088 getObjCLayout(const ObjCInterfaceDecl *D, 2089 const ObjCImplementationDecl *Impl) const; 2090 2091private: 2092 /// \brief A set of deallocations that should be performed when the 2093 /// ASTContext is destroyed. 2094 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 2095 2096 // FIXME: This currently contains the set of StoredDeclMaps used 2097 // by DeclContext objects. This probably should not be in ASTContext, 2098 // but we include it here so that ASTContext can quickly deallocate them. 2099 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 2100 2101 /// \brief A counter used to uniquely identify "blocks". 2102 mutable unsigned int UniqueBlockByRefTypeID; 2103 2104 friend class DeclContext; 2105 friend class DeclarationNameTable; 2106 void ReleaseDeclContextMaps(); 2107}; 2108 2109/// \brief Utility function for constructing a nullary selector. 2110static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 2111 IdentifierInfo* II = &Ctx.Idents.get(name); 2112 return Ctx.Selectors.getSelector(0, &II); 2113} 2114 2115/// \brief Utility function for constructing an unary selector. 2116static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 2117 IdentifierInfo* II = &Ctx.Idents.get(name); 2118 return Ctx.Selectors.getSelector(1, &II); 2119} 2120 2121} // end namespace clang 2122 2123// operator new and delete aren't allowed inside namespaces. 2124 2125/// @brief Placement new for using the ASTContext's allocator. 2126/// 2127/// This placement form of operator new uses the ASTContext's allocator for 2128/// obtaining memory. 2129/// 2130/// IMPORTANT: These are also declared in clang/AST/Attr.h! Any changes here 2131/// need to also be made there. 2132/// 2133/// We intentionally avoid using a nothrow specification here so that the calls 2134/// to this operator will not perform a null check on the result -- the 2135/// underlying allocator never returns null pointers. 2136/// 2137/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2138/// @code 2139/// // Default alignment (8) 2140/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 2141/// // Specific alignment 2142/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 2143/// @endcode 2144/// Please note that you cannot use delete on the pointer; it must be 2145/// deallocated using an explicit destructor call followed by 2146/// @c Context.Deallocate(Ptr). 2147/// 2148/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2149/// @param C The ASTContext that provides the allocator. 2150/// @param Alignment The alignment of the allocated memory (if the underlying 2151/// allocator supports it). 2152/// @return The allocated memory. Could be NULL. 2153inline void *operator new(size_t Bytes, const clang::ASTContext &C, 2154 size_t Alignment) { 2155 return C.Allocate(Bytes, Alignment); 2156} 2157/// @brief Placement delete companion to the new above. 2158/// 2159/// This operator is just a companion to the new above. There is no way of 2160/// invoking it directly; see the new operator for more details. This operator 2161/// is called implicitly by the compiler if a placement new expression using 2162/// the ASTContext throws in the object constructor. 2163inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 2164 C.Deallocate(Ptr); 2165} 2166 2167/// This placement form of operator new[] uses the ASTContext's allocator for 2168/// obtaining memory. 2169/// 2170/// We intentionally avoid using a nothrow specification here so that the calls 2171/// to this operator will not perform a null check on the result -- the 2172/// underlying allocator never returns null pointers. 2173/// 2174/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2175/// @code 2176/// // Default alignment (8) 2177/// char *data = new (Context) char[10]; 2178/// // Specific alignment 2179/// char *data = new (Context, 4) char[10]; 2180/// @endcode 2181/// Please note that you cannot use delete on the pointer; it must be 2182/// deallocated using an explicit destructor call followed by 2183/// @c Context.Deallocate(Ptr). 2184/// 2185/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2186/// @param C The ASTContext that provides the allocator. 2187/// @param Alignment The alignment of the allocated memory (if the underlying 2188/// allocator supports it). 2189/// @return The allocated memory. Could be NULL. 2190inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2191 size_t Alignment = 8) { 2192 return C.Allocate(Bytes, Alignment); 2193} 2194 2195/// @brief Placement delete[] companion to the new[] above. 2196/// 2197/// This operator is just a companion to the new[] above. There is no way of 2198/// invoking it directly; see the new[] operator for more details. This operator 2199/// is called implicitly by the compiler if a placement new[] expression using 2200/// the ASTContext throws in the object constructor. 2201inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2202 C.Deallocate(Ptr); 2203} 2204 2205#endif 2206