ASTContext.h revision 0a74a4ccc4ecfe1a2792ab72c83815323d8fc914
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/AST/ASTTypeTraits.h" 19#include "clang/AST/CanonicalType.h" 20#include "clang/AST/CommentCommandTraits.h" 21#include "clang/AST/Decl.h" 22#include "clang/AST/LambdaMangleContext.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/PrettyPrinter.h" 25#include "clang/AST/RawCommentList.h" 26#include "clang/AST/RecursiveASTVisitor.h" 27#include "clang/AST/TemplateName.h" 28#include "clang/AST/Type.h" 29#include "clang/Basic/AddressSpaces.h" 30#include "clang/Basic/IdentifierTable.h" 31#include "clang/Basic/LangOptions.h" 32#include "clang/Basic/OperatorKinds.h" 33#include "clang/Basic/PartialDiagnostic.h" 34#include "clang/Basic/VersionTuple.h" 35#include "llvm/ADT/DenseMap.h" 36#include "llvm/ADT/FoldingSet.h" 37#include "llvm/ADT/IntrusiveRefCntPtr.h" 38#include "llvm/ADT/OwningPtr.h" 39#include "llvm/ADT/SmallPtrSet.h" 40#include "llvm/ADT/TinyPtrVector.h" 41#include "llvm/Support/Allocator.h" 42#include <vector> 43 44namespace llvm { 45 struct fltSemantics; 46} 47 48namespace clang { 49 class FileManager; 50 class ASTRecordLayout; 51 class BlockExpr; 52 class CharUnits; 53 class DiagnosticsEngine; 54 class Expr; 55 class ExternalASTSource; 56 class ASTMutationListener; 57 class IdentifierTable; 58 class SelectorTable; 59 class TargetInfo; 60 class CXXABI; 61 // Decls 62 class MangleContext; 63 class ObjCIvarDecl; 64 class ObjCPropertyDecl; 65 class UnresolvedSetIterator; 66 class UsingDecl; 67 class UsingShadowDecl; 68 69 namespace Builtin { class Context; } 70 71 namespace comments { 72 class FullComment; 73 } 74 75/// \brief Holds long-lived AST nodes (such as types and decls) that can be 76/// referred to throughout the semantic analysis of a file. 77class ASTContext : public RefCountedBase<ASTContext> { 78 ASTContext &this_() { return *this; } 79 80 mutable SmallVector<Type *, 0> Types; 81 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 82 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 83 mutable llvm::FoldingSet<PointerType> PointerTypes; 84 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 85 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 86 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 87 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 88 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 89 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 90 mutable std::vector<VariableArrayType*> VariableArrayTypes; 91 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 92 mutable llvm::FoldingSet<DependentSizedExtVectorType> 93 DependentSizedExtVectorTypes; 94 mutable llvm::FoldingSet<VectorType> VectorTypes; 95 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 96 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 97 FunctionProtoTypes; 98 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 99 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 100 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 101 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 102 SubstTemplateTypeParmTypes; 103 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 104 SubstTemplateTypeParmPackTypes; 105 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 106 TemplateSpecializationTypes; 107 mutable llvm::FoldingSet<ParenType> ParenTypes; 108 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 109 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 110 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 111 ASTContext&> 112 DependentTemplateSpecializationTypes; 113 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 114 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 115 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 116 mutable llvm::FoldingSet<AutoType> AutoTypes; 117 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 118 llvm::FoldingSet<AttributedType> AttributedTypes; 119 120 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 121 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 122 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 123 SubstTemplateTemplateParms; 124 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 125 ASTContext&> 126 SubstTemplateTemplateParmPacks; 127 128 /// \brief The set of nested name specifiers. 129 /// 130 /// This set is managed by the NestedNameSpecifier class. 131 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 132 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 133 friend class NestedNameSpecifier; 134 135 /// \brief A cache mapping from RecordDecls to ASTRecordLayouts. 136 /// 137 /// This is lazily created. This is intentionally not serialized. 138 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 139 ASTRecordLayouts; 140 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 141 ObjCLayouts; 142 143 /// \brief A cache from types to size and alignment information. 144 typedef llvm::DenseMap<const Type*, 145 std::pair<uint64_t, unsigned> > TypeInfoMap; 146 mutable TypeInfoMap MemoizedTypeInfo; 147 148 /// \brief A cache mapping from CXXRecordDecls to key functions. 149 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 150 151 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 152 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 153 154 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 155 /// interface. 156 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 157 158 /// \brief Mapping from __block VarDecls to their copy initialization expr. 159 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 160 161 /// \brief Mapping from class scope functions specialization to their 162 /// template patterns. 163 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 164 ClassScopeSpecializationPattern; 165 166 /// \brief Representation of a "canonical" template template parameter that 167 /// is used in canonical template names. 168 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 169 TemplateTemplateParmDecl *Parm; 170 171 public: 172 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 173 : Parm(Parm) { } 174 175 TemplateTemplateParmDecl *getParam() const { return Parm; } 176 177 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 178 179 static void Profile(llvm::FoldingSetNodeID &ID, 180 TemplateTemplateParmDecl *Parm); 181 }; 182 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 183 CanonTemplateTemplateParms; 184 185 TemplateTemplateParmDecl * 186 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 187 188 /// \brief The typedef for the __int128_t type. 189 mutable TypedefDecl *Int128Decl; 190 191 /// \brief The typedef for the __uint128_t type. 192 mutable TypedefDecl *UInt128Decl; 193 194 /// \brief The typedef for the target specific predefined 195 /// __builtin_va_list type. 196 mutable TypedefDecl *BuiltinVaListDecl; 197 198 /// \brief The typedef for the predefined \c id type. 199 mutable TypedefDecl *ObjCIdDecl; 200 201 /// \brief The typedef for the predefined \c SEL type. 202 mutable TypedefDecl *ObjCSelDecl; 203 204 /// \brief The typedef for the predefined \c Class type. 205 mutable TypedefDecl *ObjCClassDecl; 206 207 /// \brief The typedef for the predefined \c Protocol class in Objective-C. 208 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 209 210 /// \brief The typedef for the predefined 'BOOL' type. 211 mutable TypedefDecl *BOOLDecl; 212 213 // Typedefs which may be provided defining the structure of Objective-C 214 // pseudo-builtins 215 QualType ObjCIdRedefinitionType; 216 QualType ObjCClassRedefinitionType; 217 QualType ObjCSelRedefinitionType; 218 219 QualType ObjCConstantStringType; 220 mutable RecordDecl *CFConstantStringTypeDecl; 221 222 mutable QualType ObjCSuperType; 223 224 QualType ObjCNSStringType; 225 226 /// \brief The typedef declaration for the Objective-C "instancetype" type. 227 TypedefDecl *ObjCInstanceTypeDecl; 228 229 /// \brief The type for the C FILE type. 230 TypeDecl *FILEDecl; 231 232 /// \brief The type for the C jmp_buf type. 233 TypeDecl *jmp_bufDecl; 234 235 /// \brief The type for the C sigjmp_buf type. 236 TypeDecl *sigjmp_bufDecl; 237 238 /// \brief The type for the C ucontext_t type. 239 TypeDecl *ucontext_tDecl; 240 241 /// \brief Type for the Block descriptor for Blocks CodeGen. 242 /// 243 /// Since this is only used for generation of debug info, it is not 244 /// serialized. 245 mutable RecordDecl *BlockDescriptorType; 246 247 /// \brief Type for the Block descriptor for Blocks CodeGen. 248 /// 249 /// Since this is only used for generation of debug info, it is not 250 /// serialized. 251 mutable RecordDecl *BlockDescriptorExtendedType; 252 253 /// \brief Declaration for the CUDA cudaConfigureCall function. 254 FunctionDecl *cudaConfigureCallDecl; 255 256 TypeSourceInfo NullTypeSourceInfo; 257 258 /// \brief Keeps track of all declaration attributes. 259 /// 260 /// Since so few decls have attrs, we keep them in a hash map instead of 261 /// wasting space in the Decl class. 262 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 263 264 /// \brief Keeps track of the static data member templates from which 265 /// static data members of class template specializations were instantiated. 266 /// 267 /// This data structure stores the mapping from instantiations of static 268 /// data members to the static data member representations within the 269 /// class template from which they were instantiated along with the kind 270 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 271 /// 272 /// Given the following example: 273 /// 274 /// \code 275 /// template<typename T> 276 /// struct X { 277 /// static T value; 278 /// }; 279 /// 280 /// template<typename T> 281 /// T X<T>::value = T(17); 282 /// 283 /// int *x = &X<int>::value; 284 /// \endcode 285 /// 286 /// This mapping will contain an entry that maps from the VarDecl for 287 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 288 /// class template X) and will be marked TSK_ImplicitInstantiation. 289 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 290 InstantiatedFromStaticDataMember; 291 292 /// \brief Keeps track of the declaration from which a UsingDecl was 293 /// created during instantiation. 294 /// 295 /// The source declaration is always a UsingDecl, an UnresolvedUsingValueDecl, 296 /// or an UnresolvedUsingTypenameDecl. 297 /// 298 /// For example: 299 /// \code 300 /// template<typename T> 301 /// struct A { 302 /// void f(); 303 /// }; 304 /// 305 /// template<typename T> 306 /// struct B : A<T> { 307 /// using A<T>::f; 308 /// }; 309 /// 310 /// template struct B<int>; 311 /// \endcode 312 /// 313 /// This mapping will contain an entry that maps from the UsingDecl in 314 /// B<int> to the UnresolvedUsingDecl in B<T>. 315 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 316 317 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 318 InstantiatedFromUsingShadowDecl; 319 320 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 321 322 /// \brief Mapping that stores the methods overridden by a given C++ 323 /// member function. 324 /// 325 /// Since most C++ member functions aren't virtual and therefore 326 /// don't override anything, we store the overridden functions in 327 /// this map on the side rather than within the CXXMethodDecl structure. 328 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 329 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 330 331 /// \brief Mapping from each declaration context to its corresponding lambda 332 /// mangling context. 333 llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts; 334 335 llvm::DenseMap<const DeclContext *, unsigned> UnnamedMangleContexts; 336 llvm::DenseMap<const TagDecl *, unsigned> UnnamedMangleNumbers; 337 338 /// \brief Mapping that stores parameterIndex values for ParmVarDecls when 339 /// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex. 340 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 341 ParameterIndexTable ParamIndices; 342 343 ImportDecl *FirstLocalImport; 344 ImportDecl *LastLocalImport; 345 346 TranslationUnitDecl *TUDecl; 347 348 /// \brief The associated SourceManager object.a 349 SourceManager &SourceMgr; 350 351 /// \brief The language options used to create the AST associated with 352 /// this ASTContext object. 353 LangOptions &LangOpts; 354 355 /// \brief The allocator used to create AST objects. 356 /// 357 /// AST objects are never destructed; rather, all memory associated with the 358 /// AST objects will be released when the ASTContext itself is destroyed. 359 mutable llvm::BumpPtrAllocator BumpAlloc; 360 361 /// \brief Allocator for partial diagnostics. 362 PartialDiagnostic::StorageAllocator DiagAllocator; 363 364 /// \brief The current C++ ABI. 365 OwningPtr<CXXABI> ABI; 366 CXXABI *createCXXABI(const TargetInfo &T); 367 368 /// \brief The logical -> physical address space map. 369 const LangAS::Map *AddrSpaceMap; 370 371 friend class ASTDeclReader; 372 friend class ASTReader; 373 friend class ASTWriter; 374 friend class CXXRecordDecl; 375 376 const TargetInfo *Target; 377 clang::PrintingPolicy PrintingPolicy; 378 379public: 380 IdentifierTable &Idents; 381 SelectorTable &Selectors; 382 Builtin::Context &BuiltinInfo; 383 mutable DeclarationNameTable DeclarationNames; 384 OwningPtr<ExternalASTSource> ExternalSource; 385 ASTMutationListener *Listener; 386 387 /// \brief Contains parents of a node. 388 typedef llvm::SmallVector<ast_type_traits::DynTypedNode, 1> ParentVector; 389 390 /// \brief Maps from a node to its parents. 391 typedef llvm::DenseMap<const void *, ParentVector> ParentMap; 392 393 /// \brief Returns the parents of the given node. 394 /// 395 /// Note that this will lazily compute the parents of all nodes 396 /// and store them for later retrieval. Thus, the first call is O(n) 397 /// in the number of AST nodes. 398 /// 399 /// Caveats and FIXMEs: 400 /// Calculating the parent map over all AST nodes will need to load the 401 /// full AST. This can be undesirable in the case where the full AST is 402 /// expensive to create (for example, when using precompiled header 403 /// preambles). Thus, there are good opportunities for optimization here. 404 /// One idea is to walk the given node downwards, looking for references 405 /// to declaration contexts - once a declaration context is found, compute 406 /// the parent map for the declaration context; if that can satisfy the 407 /// request, loading the whole AST can be avoided. Note that this is made 408 /// more complex by statements in templates having multiple parents - those 409 /// problems can be solved by building closure over the templated parts of 410 /// the AST, which also avoids touching large parts of the AST. 411 /// Additionally, we will want to add an interface to already give a hint 412 /// where to search for the parents, for example when looking at a statement 413 /// inside a certain function. 414 /// 415 /// 'NodeT' can be one of Decl, Stmt, Type, TypeLoc, 416 /// NestedNameSpecifier or NestedNameSpecifierLoc. 417 template <typename NodeT> 418 ParentVector getParents(const NodeT &Node) { 419 return getParents(ast_type_traits::DynTypedNode::create(Node)); 420 } 421 422 ParentVector getParents(const ast_type_traits::DynTypedNode &Node) { 423 assert(Node.getMemoizationData() && 424 "Invariant broken: only nodes that support memoization may be " 425 "used in the parent map."); 426 if (!AllParents) { 427 // We always need to run over the whole translation unit, as 428 // hasAncestor can escape any subtree. 429 AllParents.reset( 430 ParentMapASTVisitor::buildMap(*getTranslationUnitDecl())); 431 } 432 ParentMap::const_iterator I = AllParents->find(Node.getMemoizationData()); 433 if (I == AllParents->end()) { 434 return ParentVector(); 435 } 436 return I->second; 437 } 438 439 const clang::PrintingPolicy &getPrintingPolicy() const { 440 return PrintingPolicy; 441 } 442 443 void setPrintingPolicy(const clang::PrintingPolicy &Policy) { 444 PrintingPolicy = Policy; 445 } 446 447 SourceManager& getSourceManager() { return SourceMgr; } 448 const SourceManager& getSourceManager() const { return SourceMgr; } 449 450 llvm::BumpPtrAllocator &getAllocator() const { 451 return BumpAlloc; 452 } 453 454 void *Allocate(unsigned Size, unsigned Align = 8) const { 455 return BumpAlloc.Allocate(Size, Align); 456 } 457 void Deallocate(void *Ptr) const { } 458 459 /// Return the total amount of physical memory allocated for representing 460 /// AST nodes and type information. 461 size_t getASTAllocatedMemory() const { 462 return BumpAlloc.getTotalMemory(); 463 } 464 /// Return the total memory used for various side tables. 465 size_t getSideTableAllocatedMemory() const; 466 467 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 468 return DiagAllocator; 469 } 470 471 const TargetInfo &getTargetInfo() const { return *Target; } 472 473 const LangOptions& getLangOpts() const { return LangOpts; } 474 475 DiagnosticsEngine &getDiagnostics() const; 476 477 FullSourceLoc getFullLoc(SourceLocation Loc) const { 478 return FullSourceLoc(Loc,SourceMgr); 479 } 480 481 /// \brief All comments in this translation unit. 482 RawCommentList Comments; 483 484 /// \brief True if comments are already loaded from ExternalASTSource. 485 mutable bool CommentsLoaded; 486 487 class RawCommentAndCacheFlags { 488 public: 489 enum Kind { 490 /// We searched for a comment attached to the particular declaration, but 491 /// didn't find any. 492 /// 493 /// getRaw() == 0. 494 NoCommentInDecl = 0, 495 496 /// We have found a comment attached to this particular declaration. 497 /// 498 /// getRaw() != 0. 499 FromDecl, 500 501 /// This declaration does not have an attached comment, and we have 502 /// searched the redeclaration chain. 503 /// 504 /// If getRaw() == 0, the whole redeclaration chain does not have any 505 /// comments. 506 /// 507 /// If getRaw() != 0, it is a comment propagated from other 508 /// redeclaration. 509 FromRedecl 510 }; 511 512 Kind getKind() const LLVM_READONLY { 513 return Data.getInt(); 514 } 515 516 void setKind(Kind K) { 517 Data.setInt(K); 518 } 519 520 const RawComment *getRaw() const LLVM_READONLY { 521 return Data.getPointer(); 522 } 523 524 void setRaw(const RawComment *RC) { 525 Data.setPointer(RC); 526 } 527 528 const Decl *getOriginalDecl() const LLVM_READONLY { 529 return OriginalDecl; 530 } 531 532 void setOriginalDecl(const Decl *Orig) { 533 OriginalDecl = Orig; 534 } 535 536 private: 537 llvm::PointerIntPair<const RawComment *, 2, Kind> Data; 538 const Decl *OriginalDecl; 539 }; 540 541 /// \brief Mapping from declarations to comments attached to any 542 /// redeclaration. 543 /// 544 /// Raw comments are owned by Comments list. This mapping is populated 545 /// lazily. 546 mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments; 547 548 /// \brief Mapping from declarations to parsed comments attached to any 549 /// redeclaration. 550 mutable llvm::DenseMap<const Decl *, comments::FullComment *> ParsedComments; 551 552 /// \brief Return the documentation comment attached to a given declaration, 553 /// without looking into cache. 554 RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 555 556public: 557 RawCommentList &getRawCommentList() { 558 return Comments; 559 } 560 561 void addComment(const RawComment &RC) { 562 assert(LangOpts.RetainCommentsFromSystemHeaders || 563 !SourceMgr.isInSystemHeader(RC.getSourceRange().getBegin())); 564 Comments.addComment(RC, BumpAlloc); 565 } 566 567 /// \brief Return the documentation comment attached to a given declaration. 568 /// Returns NULL if no comment is attached. 569 /// 570 /// \param OriginalDecl if not NULL, is set to declaration AST node that had 571 /// the comment, if the comment we found comes from a redeclaration. 572 const RawComment *getRawCommentForAnyRedecl( 573 const Decl *D, 574 const Decl **OriginalDecl = NULL) const; 575 576 /// Return parsed documentation comment attached to a given declaration. 577 /// Returns NULL if no comment is attached. 578 /// 579 /// \param PP the Preprocessor used with this TU. Could be NULL if 580 /// preprocessor is not available. 581 comments::FullComment *getCommentForDecl(const Decl *D, 582 const Preprocessor *PP) const; 583 584 /// Return parsed documentation comment attached to a given declaration. 585 /// Returns NULL if no comment is attached. Does not look at any 586 /// redeclarations of the declaration. 587 comments::FullComment *getLocalCommentForDeclUncached(const Decl *D) const; 588 589 comments::FullComment *cloneFullComment(comments::FullComment *FC, 590 const Decl *D) const; 591 592private: 593 mutable comments::CommandTraits CommentCommandTraits; 594 595public: 596 comments::CommandTraits &getCommentCommandTraits() const { 597 return CommentCommandTraits; 598 } 599 600 /// \brief Retrieve the attributes for the given declaration. 601 AttrVec& getDeclAttrs(const Decl *D); 602 603 /// \brief Erase the attributes corresponding to the given declaration. 604 void eraseDeclAttrs(const Decl *D); 605 606 /// \brief If this variable is an instantiated static data member of a 607 /// class template specialization, returns the templated static data member 608 /// from which it was instantiated. 609 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 610 const VarDecl *Var); 611 612 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 613 614 void setClassScopeSpecializationPattern(FunctionDecl *FD, 615 FunctionDecl *Pattern); 616 617 /// \brief Note that the static data member \p Inst is an instantiation of 618 /// the static data member template \p Tmpl of a class template. 619 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 620 TemplateSpecializationKind TSK, 621 SourceLocation PointOfInstantiation = SourceLocation()); 622 623 /// \brief If the given using decl \p Inst is an instantiation of a 624 /// (possibly unresolved) using decl from a template instantiation, 625 /// return it. 626 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 627 628 /// \brief Remember that the using decl \p Inst is an instantiation 629 /// of the using decl \p Pattern of a class template. 630 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 631 632 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 633 UsingShadowDecl *Pattern); 634 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 635 636 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 637 638 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 639 640 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 641 /// the non-bitfield \p LastFD. 642 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 643 const FieldDecl *LastFD) const; 644 645 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 646 /// the bitfield \p LastFD. 647 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 648 const FieldDecl *LastFD) const; 649 650 /// \brief Return \c true if \p FD is a bitfield which follows the bitfield 651 /// \p LastFD. 652 bool BitfieldFollowsBitfield(const FieldDecl *FD, 653 const FieldDecl *LastFD) const; 654 655 /// \brief Return \c true if \p FD is not a bitfield which follows the 656 /// bitfield \p LastFD. 657 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 658 const FieldDecl *LastFD) const; 659 660 /// \brief Return \c true if \p FD is a bitfield which follows the 661 /// non-bitfield \p LastFD. 662 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 663 const FieldDecl *LastFD) const; 664 665 // Access to the set of methods overridden by the given C++ method. 666 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 667 overridden_cxx_method_iterator 668 overridden_methods_begin(const CXXMethodDecl *Method) const; 669 670 overridden_cxx_method_iterator 671 overridden_methods_end(const CXXMethodDecl *Method) const; 672 673 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 674 675 /// \brief Note that the given C++ \p Method overrides the given \p 676 /// Overridden method. 677 void addOverriddenMethod(const CXXMethodDecl *Method, 678 const CXXMethodDecl *Overridden); 679 680 /// \brief Return C++ or ObjC overridden methods for the given \p Method. 681 /// 682 /// An ObjC method is considered to override any method in the class's 683 /// base classes, its protocols, or its categories' protocols, that has 684 /// the same selector and is of the same kind (class or instance). 685 /// A method in an implementation is not considered as overriding the same 686 /// method in the interface or its categories. 687 void getOverriddenMethods( 688 const NamedDecl *Method, 689 SmallVectorImpl<const NamedDecl *> &Overridden) const; 690 691 /// \brief Notify the AST context that a new import declaration has been 692 /// parsed or implicitly created within this translation unit. 693 void addedLocalImportDecl(ImportDecl *Import); 694 695 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 696 return Import->NextLocalImport; 697 } 698 699 /// \brief Iterator that visits import declarations. 700 class import_iterator { 701 ImportDecl *Import; 702 703 public: 704 typedef ImportDecl *value_type; 705 typedef ImportDecl *reference; 706 typedef ImportDecl *pointer; 707 typedef int difference_type; 708 typedef std::forward_iterator_tag iterator_category; 709 710 import_iterator() : Import() { } 711 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 712 713 reference operator*() const { return Import; } 714 pointer operator->() const { return Import; } 715 716 import_iterator &operator++() { 717 Import = ASTContext::getNextLocalImport(Import); 718 return *this; 719 } 720 721 import_iterator operator++(int) { 722 import_iterator Other(*this); 723 ++(*this); 724 return Other; 725 } 726 727 friend bool operator==(import_iterator X, import_iterator Y) { 728 return X.Import == Y.Import; 729 } 730 731 friend bool operator!=(import_iterator X, import_iterator Y) { 732 return X.Import != Y.Import; 733 } 734 }; 735 736 import_iterator local_import_begin() const { 737 return import_iterator(FirstLocalImport); 738 } 739 import_iterator local_import_end() const { return import_iterator(); } 740 741 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 742 743 744 // Builtin Types. 745 CanQualType VoidTy; 746 CanQualType BoolTy; 747 CanQualType CharTy; 748 CanQualType WCharTy; // [C++ 3.9.1p5]. 749 CanQualType WideCharTy; // Same as WCharTy in C++, integer type in C99. 750 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 751 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 752 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 753 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 754 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 755 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 756 CanQualType FloatTy, DoubleTy, LongDoubleTy; 757 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 758 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 759 CanQualType VoidPtrTy, NullPtrTy; 760 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 761 CanQualType BuiltinFnTy; 762 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 763 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 764 CanQualType ObjCBuiltinBoolTy; 765 CanQualType OCLImage1dTy, OCLImage1dArrayTy, OCLImage1dBufferTy; 766 CanQualType OCLImage2dTy, OCLImage2dArrayTy; 767 CanQualType OCLImage3dTy; 768 CanQualType OCLSamplerTy, OCLEventTy; 769 770 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 771 mutable QualType AutoDeductTy; // Deduction against 'auto'. 772 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 773 774 // Type used to help define __builtin_va_list for some targets. 775 // The type is built when constructing 'BuiltinVaListDecl'. 776 mutable QualType VaListTagTy; 777 778 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 779 IdentifierTable &idents, SelectorTable &sels, 780 Builtin::Context &builtins, 781 unsigned size_reserve, 782 bool DelayInitialization = false); 783 784 ~ASTContext(); 785 786 /// \brief Attach an external AST source to the AST context. 787 /// 788 /// The external AST source provides the ability to load parts of 789 /// the abstract syntax tree as needed from some external storage, 790 /// e.g., a precompiled header. 791 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 792 793 /// \brief Retrieve a pointer to the external AST source associated 794 /// with this AST context, if any. 795 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 796 797 /// \brief Attach an AST mutation listener to the AST context. 798 /// 799 /// The AST mutation listener provides the ability to track modifications to 800 /// the abstract syntax tree entities committed after they were initially 801 /// created. 802 void setASTMutationListener(ASTMutationListener *Listener) { 803 this->Listener = Listener; 804 } 805 806 /// \brief Retrieve a pointer to the AST mutation listener associated 807 /// with this AST context, if any. 808 ASTMutationListener *getASTMutationListener() const { return Listener; } 809 810 void PrintStats() const; 811 const SmallVectorImpl<Type *>& getTypes() const { return Types; } 812 813 /// \brief Retrieve the declaration for the 128-bit signed integer type. 814 TypedefDecl *getInt128Decl() const; 815 816 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 817 TypedefDecl *getUInt128Decl() const; 818 819 //===--------------------------------------------------------------------===// 820 // Type Constructors 821 //===--------------------------------------------------------------------===// 822 823private: 824 /// \brief Return a type with extended qualifiers. 825 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 826 827 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 828 829public: 830 /// \brief Return the uniqued reference to the type for an address space 831 /// qualified type with the specified type and address space. 832 /// 833 /// The resulting type has a union of the qualifiers from T and the address 834 /// space. If T already has an address space specifier, it is silently 835 /// replaced. 836 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 837 838 /// \brief Return the uniqued reference to the type for an Objective-C 839 /// gc-qualified type. 840 /// 841 /// The retulting type has a union of the qualifiers from T and the gc 842 /// attribute. 843 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 844 845 /// \brief Return the uniqued reference to the type for a \c restrict 846 /// qualified type. 847 /// 848 /// The resulting type has a union of the qualifiers from \p T and 849 /// \c restrict. 850 QualType getRestrictType(QualType T) const { 851 return T.withFastQualifiers(Qualifiers::Restrict); 852 } 853 854 /// \brief Return the uniqued reference to the type for a \c volatile 855 /// qualified type. 856 /// 857 /// The resulting type has a union of the qualifiers from \p T and 858 /// \c volatile. 859 QualType getVolatileType(QualType T) const { 860 return T.withFastQualifiers(Qualifiers::Volatile); 861 } 862 863 /// \brief Return the uniqued reference to the type for a \c const 864 /// qualified type. 865 /// 866 /// The resulting type has a union of the qualifiers from \p T and \c const. 867 /// 868 /// It can be reasonably expected that this will always be equivalent to 869 /// calling T.withConst(). 870 QualType getConstType(QualType T) const { return T.withConst(); } 871 872 /// \brief Change the ExtInfo on a function type. 873 const FunctionType *adjustFunctionType(const FunctionType *Fn, 874 FunctionType::ExtInfo EInfo); 875 876 /// \brief Change the result type of a function type once it is deduced. 877 void adjustDeducedFunctionResultType(FunctionDecl *FD, QualType ResultType); 878 879 /// \brief Return the uniqued reference to the type for a complex 880 /// number with the specified element type. 881 QualType getComplexType(QualType T) const; 882 CanQualType getComplexType(CanQualType T) const { 883 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 884 } 885 886 /// \brief Return the uniqued reference to the type for a pointer to 887 /// the specified type. 888 QualType getPointerType(QualType T) const; 889 CanQualType getPointerType(CanQualType T) const { 890 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 891 } 892 893 /// \brief Return the uniqued reference to the atomic type for the specified 894 /// type. 895 QualType getAtomicType(QualType T) const; 896 897 /// \brief Return the uniqued reference to the type for a block of the 898 /// specified type. 899 QualType getBlockPointerType(QualType T) const; 900 901 /// Gets the struct used to keep track of the descriptor for pointer to 902 /// blocks. 903 QualType getBlockDescriptorType() const; 904 905 /// Gets the struct used to keep track of the extended descriptor for 906 /// pointer to blocks. 907 QualType getBlockDescriptorExtendedType() const; 908 909 void setcudaConfigureCallDecl(FunctionDecl *FD) { 910 cudaConfigureCallDecl = FD; 911 } 912 FunctionDecl *getcudaConfigureCallDecl() { 913 return cudaConfigureCallDecl; 914 } 915 916 /// Returns true iff we need copy/dispose helpers for the given type. 917 bool BlockRequiresCopying(QualType Ty, const VarDecl *D); 918 919 920 /// Returns true, if given type has a known lifetime. HasByrefExtendedLayout is set 921 /// to false in this case. If HasByrefExtendedLayout returns true, byref variable 922 /// has extended lifetime. 923 bool getByrefLifetime(QualType Ty, 924 Qualifiers::ObjCLifetime &Lifetime, 925 bool &HasByrefExtendedLayout) const; 926 927 /// \brief Return the uniqued reference to the type for an lvalue reference 928 /// to the specified type. 929 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 930 const; 931 932 /// \brief Return the uniqued reference to the type for an rvalue reference 933 /// to the specified type. 934 QualType getRValueReferenceType(QualType T) const; 935 936 /// \brief Return the uniqued reference to the type for a member pointer to 937 /// the specified type in the specified class. 938 /// 939 /// The class \p Cls is a \c Type because it could be a dependent name. 940 QualType getMemberPointerType(QualType T, const Type *Cls) const; 941 942 /// \brief Return a non-unique reference to the type for a variable array of 943 /// the specified element type. 944 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 945 ArrayType::ArraySizeModifier ASM, 946 unsigned IndexTypeQuals, 947 SourceRange Brackets) const; 948 949 /// \brief Return a non-unique reference to the type for a dependently-sized 950 /// array of the specified element type. 951 /// 952 /// FIXME: We will need these to be uniqued, or at least comparable, at some 953 /// point. 954 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 955 ArrayType::ArraySizeModifier ASM, 956 unsigned IndexTypeQuals, 957 SourceRange Brackets) const; 958 959 /// \brief Return a unique reference to the type for an incomplete array of 960 /// the specified element type. 961 QualType getIncompleteArrayType(QualType EltTy, 962 ArrayType::ArraySizeModifier ASM, 963 unsigned IndexTypeQuals) const; 964 965 /// \brief Return the unique reference to the type for a constant array of 966 /// the specified element type. 967 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 968 ArrayType::ArraySizeModifier ASM, 969 unsigned IndexTypeQuals) const; 970 971 /// \brief Returns a vla type where known sizes are replaced with [*]. 972 QualType getVariableArrayDecayedType(QualType Ty) const; 973 974 /// \brief Return the unique reference to a vector type of the specified 975 /// element type and size. 976 /// 977 /// \pre \p VectorType must be a built-in type. 978 QualType getVectorType(QualType VectorType, unsigned NumElts, 979 VectorType::VectorKind VecKind) const; 980 981 /// \brief Return the unique reference to an extended vector type 982 /// of the specified element type and size. 983 /// 984 /// \pre \p VectorType must be a built-in type. 985 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 986 987 /// \pre Return a non-unique reference to the type for a dependently-sized 988 /// vector of the specified element type. 989 /// 990 /// FIXME: We will need these to be uniqued, or at least comparable, at some 991 /// point. 992 QualType getDependentSizedExtVectorType(QualType VectorType, 993 Expr *SizeExpr, 994 SourceLocation AttrLoc) const; 995 996 /// \brief Return a K&R style C function type like 'int()'. 997 QualType getFunctionNoProtoType(QualType ResultTy, 998 const FunctionType::ExtInfo &Info) const; 999 1000 QualType getFunctionNoProtoType(QualType ResultTy) const { 1001 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 1002 } 1003 1004 /// \brief Return a normal function type with a typed argument list. 1005 QualType getFunctionType(QualType ResultTy, ArrayRef<QualType> Args, 1006 const FunctionProtoType::ExtProtoInfo &EPI) const; 1007 1008 /// \brief Return the unique reference to the type for the specified type 1009 /// declaration. 1010 QualType getTypeDeclType(const TypeDecl *Decl, 1011 const TypeDecl *PrevDecl = 0) const { 1012 assert(Decl && "Passed null for Decl param"); 1013 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1014 1015 if (PrevDecl) { 1016 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 1017 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1018 return QualType(PrevDecl->TypeForDecl, 0); 1019 } 1020 1021 return getTypeDeclTypeSlow(Decl); 1022 } 1023 1024 /// \brief Return the unique reference to the type for the specified 1025 /// typedef-name decl. 1026 QualType getTypedefType(const TypedefNameDecl *Decl, 1027 QualType Canon = QualType()) const; 1028 1029 QualType getRecordType(const RecordDecl *Decl) const; 1030 1031 QualType getEnumType(const EnumDecl *Decl) const; 1032 1033 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 1034 1035 QualType getAttributedType(AttributedType::Kind attrKind, 1036 QualType modifiedType, 1037 QualType equivalentType); 1038 1039 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 1040 QualType Replacement) const; 1041 QualType getSubstTemplateTypeParmPackType( 1042 const TemplateTypeParmType *Replaced, 1043 const TemplateArgument &ArgPack); 1044 1045 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 1046 bool ParameterPack, 1047 TemplateTypeParmDecl *ParmDecl = 0) const; 1048 1049 QualType getTemplateSpecializationType(TemplateName T, 1050 const TemplateArgument *Args, 1051 unsigned NumArgs, 1052 QualType Canon = QualType()) const; 1053 1054 QualType getCanonicalTemplateSpecializationType(TemplateName T, 1055 const TemplateArgument *Args, 1056 unsigned NumArgs) const; 1057 1058 QualType getTemplateSpecializationType(TemplateName T, 1059 const TemplateArgumentListInfo &Args, 1060 QualType Canon = QualType()) const; 1061 1062 TypeSourceInfo * 1063 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 1064 const TemplateArgumentListInfo &Args, 1065 QualType Canon = QualType()) const; 1066 1067 QualType getParenType(QualType NamedType) const; 1068 1069 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1070 NestedNameSpecifier *NNS, 1071 QualType NamedType) const; 1072 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 1073 NestedNameSpecifier *NNS, 1074 const IdentifierInfo *Name, 1075 QualType Canon = QualType()) const; 1076 1077 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1078 NestedNameSpecifier *NNS, 1079 const IdentifierInfo *Name, 1080 const TemplateArgumentListInfo &Args) const; 1081 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1082 NestedNameSpecifier *NNS, 1083 const IdentifierInfo *Name, 1084 unsigned NumArgs, 1085 const TemplateArgument *Args) const; 1086 1087 QualType getPackExpansionType(QualType Pattern, 1088 Optional<unsigned> NumExpansions); 1089 1090 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1091 ObjCInterfaceDecl *PrevDecl = 0) const; 1092 1093 QualType getObjCObjectType(QualType Base, 1094 ObjCProtocolDecl * const *Protocols, 1095 unsigned NumProtocols) const; 1096 1097 /// \brief Return a ObjCObjectPointerType type for the given ObjCObjectType. 1098 QualType getObjCObjectPointerType(QualType OIT) const; 1099 1100 /// \brief GCC extension. 1101 QualType getTypeOfExprType(Expr *e) const; 1102 QualType getTypeOfType(QualType t) const; 1103 1104 /// \brief C++11 decltype. 1105 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 1106 1107 /// \brief Unary type transforms 1108 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 1109 UnaryTransformType::UTTKind UKind) const; 1110 1111 /// \brief C++11 deduced auto type. 1112 QualType getAutoType(QualType DeducedType, bool IsDecltypeAuto, 1113 bool IsDependent = false) const; 1114 1115 /// \brief C++11 deduction pattern for 'auto' type. 1116 QualType getAutoDeductType() const; 1117 1118 /// \brief C++11 deduction pattern for 'auto &&' type. 1119 QualType getAutoRRefDeductType() const; 1120 1121 /// \brief Return the unique reference to the type for the specified TagDecl 1122 /// (struct/union/class/enum) decl. 1123 QualType getTagDeclType(const TagDecl *Decl) const; 1124 1125 /// \brief Return the unique type for "size_t" (C99 7.17), defined in 1126 /// <stddef.h>. 1127 /// 1128 /// The sizeof operator requires this (C99 6.5.3.4p4). 1129 CanQualType getSizeType() const; 1130 1131 /// \brief Return the unique type for "intmax_t" (C99 7.18.1.5), defined in 1132 /// <stdint.h>. 1133 CanQualType getIntMaxType() const; 1134 1135 /// \brief Return the unique type for "uintmax_t" (C99 7.18.1.5), defined in 1136 /// <stdint.h>. 1137 CanQualType getUIntMaxType() const; 1138 1139 /// \brief Return the unique wchar_t type available in C++ (and available as 1140 /// __wchar_t as a Microsoft extension). 1141 QualType getWCharType() const { return WCharTy; } 1142 1143 /// \brief Return the type of wide characters. In C++, this returns the 1144 /// unique wchar_t type. In C99, this returns a type compatible with the type 1145 /// defined in <stddef.h> as defined by the target. 1146 QualType getWideCharType() const { return WideCharTy; } 1147 1148 /// \brief Return the type of "signed wchar_t". 1149 /// 1150 /// Used when in C++, as a GCC extension. 1151 QualType getSignedWCharType() const; 1152 1153 /// \brief Return the type of "unsigned wchar_t". 1154 /// 1155 /// Used when in C++, as a GCC extension. 1156 QualType getUnsignedWCharType() const; 1157 1158 /// \brief In C99, this returns a type compatible with the type 1159 /// defined in <stddef.h> as defined by the target. 1160 QualType getWIntType() const { return WIntTy; } 1161 1162 /// \brief Return a type compatible with "intptr_t" (C99 7.18.1.4), 1163 /// as defined by the target. 1164 QualType getIntPtrType() const; 1165 1166 /// \brief Return a type compatible with "uintptr_t" (C99 7.18.1.4), 1167 /// as defined by the target. 1168 QualType getUIntPtrType() const; 1169 1170 /// \brief Return the unique type for "ptrdiff_t" (C99 7.17) defined in 1171 /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1172 QualType getPointerDiffType() const; 1173 1174 /// \brief Return the unique type for "pid_t" defined in 1175 /// <sys/types.h>. We need this to compute the correct type for vfork(). 1176 QualType getProcessIDType() const; 1177 1178 /// \brief Return the C structure type used to represent constant CFStrings. 1179 QualType getCFConstantStringType() const; 1180 1181 /// \brief Returns the C struct type for objc_super 1182 QualType getObjCSuperType() const; 1183 void setObjCSuperType(QualType ST) { ObjCSuperType = ST; } 1184 1185 /// Get the structure type used to representation CFStrings, or NULL 1186 /// if it hasn't yet been built. 1187 QualType getRawCFConstantStringType() const { 1188 if (CFConstantStringTypeDecl) 1189 return getTagDeclType(CFConstantStringTypeDecl); 1190 return QualType(); 1191 } 1192 void setCFConstantStringType(QualType T); 1193 1194 // This setter/getter represents the ObjC type for an NSConstantString. 1195 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 1196 QualType getObjCConstantStringInterface() const { 1197 return ObjCConstantStringType; 1198 } 1199 1200 QualType getObjCNSStringType() const { 1201 return ObjCNSStringType; 1202 } 1203 1204 void setObjCNSStringType(QualType T) { 1205 ObjCNSStringType = T; 1206 } 1207 1208 /// \brief Retrieve the type that \c id has been defined to, which may be 1209 /// different from the built-in \c id if \c id has been typedef'd. 1210 QualType getObjCIdRedefinitionType() const { 1211 if (ObjCIdRedefinitionType.isNull()) 1212 return getObjCIdType(); 1213 return ObjCIdRedefinitionType; 1214 } 1215 1216 /// \brief Set the user-written type that redefines \c id. 1217 void setObjCIdRedefinitionType(QualType RedefType) { 1218 ObjCIdRedefinitionType = RedefType; 1219 } 1220 1221 /// \brief Retrieve the type that \c Class has been defined to, which may be 1222 /// different from the built-in \c Class if \c Class has been typedef'd. 1223 QualType getObjCClassRedefinitionType() const { 1224 if (ObjCClassRedefinitionType.isNull()) 1225 return getObjCClassType(); 1226 return ObjCClassRedefinitionType; 1227 } 1228 1229 /// \brief Set the user-written type that redefines 'SEL'. 1230 void setObjCClassRedefinitionType(QualType RedefType) { 1231 ObjCClassRedefinitionType = RedefType; 1232 } 1233 1234 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1235 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1236 QualType getObjCSelRedefinitionType() const { 1237 if (ObjCSelRedefinitionType.isNull()) 1238 return getObjCSelType(); 1239 return ObjCSelRedefinitionType; 1240 } 1241 1242 1243 /// \brief Set the user-written type that redefines 'SEL'. 1244 void setObjCSelRedefinitionType(QualType RedefType) { 1245 ObjCSelRedefinitionType = RedefType; 1246 } 1247 1248 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1249 /// otherwise, returns a NULL type; 1250 QualType getObjCInstanceType() { 1251 return getTypeDeclType(getObjCInstanceTypeDecl()); 1252 } 1253 1254 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1255 /// "instancetype" type. 1256 TypedefDecl *getObjCInstanceTypeDecl(); 1257 1258 /// \brief Set the type for the C FILE type. 1259 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1260 1261 /// \brief Retrieve the C FILE type. 1262 QualType getFILEType() const { 1263 if (FILEDecl) 1264 return getTypeDeclType(FILEDecl); 1265 return QualType(); 1266 } 1267 1268 /// \brief Set the type for the C jmp_buf type. 1269 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1270 this->jmp_bufDecl = jmp_bufDecl; 1271 } 1272 1273 /// \brief Retrieve the C jmp_buf type. 1274 QualType getjmp_bufType() const { 1275 if (jmp_bufDecl) 1276 return getTypeDeclType(jmp_bufDecl); 1277 return QualType(); 1278 } 1279 1280 /// \brief Set the type for the C sigjmp_buf type. 1281 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1282 this->sigjmp_bufDecl = sigjmp_bufDecl; 1283 } 1284 1285 /// \brief Retrieve the C sigjmp_buf type. 1286 QualType getsigjmp_bufType() const { 1287 if (sigjmp_bufDecl) 1288 return getTypeDeclType(sigjmp_bufDecl); 1289 return QualType(); 1290 } 1291 1292 /// \brief Set the type for the C ucontext_t type. 1293 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1294 this->ucontext_tDecl = ucontext_tDecl; 1295 } 1296 1297 /// \brief Retrieve the C ucontext_t type. 1298 QualType getucontext_tType() const { 1299 if (ucontext_tDecl) 1300 return getTypeDeclType(ucontext_tDecl); 1301 return QualType(); 1302 } 1303 1304 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1305 QualType getLogicalOperationType() const { 1306 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1307 } 1308 1309 /// \brief Emit the Objective-CC type encoding for the given type \p T into 1310 /// \p S. 1311 /// 1312 /// If \p Field is specified then record field names are also encoded. 1313 void getObjCEncodingForType(QualType T, std::string &S, 1314 const FieldDecl *Field=0) const; 1315 1316 void getLegacyIntegralTypeEncoding(QualType &t) const; 1317 1318 /// \brief Put the string version of the type qualifiers \p QT into \p S. 1319 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1320 std::string &S) const; 1321 1322 /// \brief Emit the encoded type for the function \p Decl into \p S. 1323 /// 1324 /// This is in the same format as Objective-C method encodings. 1325 /// 1326 /// \returns true if an error occurred (e.g., because one of the parameter 1327 /// types is incomplete), false otherwise. 1328 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1329 1330 /// \brief Emit the encoded type for the method declaration \p Decl into 1331 /// \p S. 1332 /// 1333 /// \returns true if an error occurred (e.g., because one of the parameter 1334 /// types is incomplete), false otherwise. 1335 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1336 bool Extended = false) 1337 const; 1338 1339 /// \brief Return the encoded type for this block declaration. 1340 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1341 1342 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1343 /// this method declaration. If non-NULL, Container must be either 1344 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1345 /// only be NULL when getting encodings for protocol properties. 1346 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1347 const Decl *Container, 1348 std::string &S) const; 1349 1350 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1351 ObjCProtocolDecl *rProto) const; 1352 1353 /// \brief Return the size of type \p T for Objective-C encoding purpose, 1354 /// in characters. 1355 CharUnits getObjCEncodingTypeSize(QualType T) const; 1356 1357 /// \brief Retrieve the typedef corresponding to the predefined \c id type 1358 /// in Objective-C. 1359 TypedefDecl *getObjCIdDecl() const; 1360 1361 /// \brief Represents the Objective-CC \c id type. 1362 /// 1363 /// This is set up lazily, by Sema. \c id is always a (typedef for a) 1364 /// pointer type, a pointer to a struct. 1365 QualType getObjCIdType() const { 1366 return getTypeDeclType(getObjCIdDecl()); 1367 } 1368 1369 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1370 /// in Objective-C. 1371 TypedefDecl *getObjCSelDecl() const; 1372 1373 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1374 /// 'SEL' type. 1375 QualType getObjCSelType() const { 1376 return getTypeDeclType(getObjCSelDecl()); 1377 } 1378 1379 /// \brief Retrieve the typedef declaration corresponding to the predefined 1380 /// Objective-C 'Class' type. 1381 TypedefDecl *getObjCClassDecl() const; 1382 1383 /// \brief Represents the Objective-C \c Class type. 1384 /// 1385 /// This is set up lazily, by Sema. \c Class is always a (typedef for a) 1386 /// pointer type, a pointer to a struct. 1387 QualType getObjCClassType() const { 1388 return getTypeDeclType(getObjCClassDecl()); 1389 } 1390 1391 /// \brief Retrieve the Objective-C class declaration corresponding to 1392 /// the predefined \c Protocol class. 1393 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1394 1395 /// \brief Retrieve declaration of 'BOOL' typedef 1396 TypedefDecl *getBOOLDecl() const { 1397 return BOOLDecl; 1398 } 1399 1400 /// \brief Save declaration of 'BOOL' typedef 1401 void setBOOLDecl(TypedefDecl *TD) { 1402 BOOLDecl = TD; 1403 } 1404 1405 /// \brief type of 'BOOL' type. 1406 QualType getBOOLType() const { 1407 return getTypeDeclType(getBOOLDecl()); 1408 } 1409 1410 /// \brief Retrieve the type of the Objective-C \c Protocol class. 1411 QualType getObjCProtoType() const { 1412 return getObjCInterfaceType(getObjCProtocolDecl()); 1413 } 1414 1415 /// \brief Retrieve the C type declaration corresponding to the predefined 1416 /// \c __builtin_va_list type. 1417 TypedefDecl *getBuiltinVaListDecl() const; 1418 1419 /// \brief Retrieve the type of the \c __builtin_va_list type. 1420 QualType getBuiltinVaListType() const { 1421 return getTypeDeclType(getBuiltinVaListDecl()); 1422 } 1423 1424 /// \brief Retrieve the C type declaration corresponding to the predefined 1425 /// \c __va_list_tag type used to help define the \c __builtin_va_list type 1426 /// for some targets. 1427 QualType getVaListTagType() const; 1428 1429 /// \brief Return a type with additional \c const, \c volatile, or 1430 /// \c restrict qualifiers. 1431 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1432 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1433 } 1434 1435 /// \brief Un-split a SplitQualType. 1436 QualType getQualifiedType(SplitQualType split) const { 1437 return getQualifiedType(split.Ty, split.Quals); 1438 } 1439 1440 /// \brief Return a type with additional qualifiers. 1441 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1442 if (!Qs.hasNonFastQualifiers()) 1443 return T.withFastQualifiers(Qs.getFastQualifiers()); 1444 QualifierCollector Qc(Qs); 1445 const Type *Ptr = Qc.strip(T); 1446 return getExtQualType(Ptr, Qc); 1447 } 1448 1449 /// \brief Return a type with additional qualifiers. 1450 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1451 if (!Qs.hasNonFastQualifiers()) 1452 return QualType(T, Qs.getFastQualifiers()); 1453 return getExtQualType(T, Qs); 1454 } 1455 1456 /// \brief Return a type with the given lifetime qualifier. 1457 /// 1458 /// \pre Neither type.ObjCLifetime() nor \p lifetime may be \c OCL_None. 1459 QualType getLifetimeQualifiedType(QualType type, 1460 Qualifiers::ObjCLifetime lifetime) { 1461 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1462 assert(lifetime != Qualifiers::OCL_None); 1463 1464 Qualifiers qs; 1465 qs.addObjCLifetime(lifetime); 1466 return getQualifiedType(type, qs); 1467 } 1468 1469 /// getUnqualifiedObjCPointerType - Returns version of 1470 /// Objective-C pointer type with lifetime qualifier removed. 1471 QualType getUnqualifiedObjCPointerType(QualType type) const { 1472 if (!type.getTypePtr()->isObjCObjectPointerType() || 1473 !type.getQualifiers().hasObjCLifetime()) 1474 return type; 1475 Qualifiers Qs = type.getQualifiers(); 1476 Qs.removeObjCLifetime(); 1477 return getQualifiedType(type.getUnqualifiedType(), Qs); 1478 } 1479 1480 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1481 SourceLocation NameLoc) const; 1482 1483 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1484 UnresolvedSetIterator End) const; 1485 1486 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1487 bool TemplateKeyword, 1488 TemplateDecl *Template) const; 1489 1490 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1491 const IdentifierInfo *Name) const; 1492 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1493 OverloadedOperatorKind Operator) const; 1494 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1495 TemplateName replacement) const; 1496 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1497 const TemplateArgument &ArgPack) const; 1498 1499 enum GetBuiltinTypeError { 1500 GE_None, ///< No error 1501 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1502 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1503 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1504 }; 1505 1506 /// \brief Return the type for the specified builtin. 1507 /// 1508 /// If \p IntegerConstantArgs is non-null, it is filled in with a bitmask of 1509 /// arguments to the builtin that are required to be integer constant 1510 /// expressions. 1511 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1512 unsigned *IntegerConstantArgs = 0) const; 1513 1514private: 1515 CanQualType getFromTargetType(unsigned Type) const; 1516 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1517 1518 //===--------------------------------------------------------------------===// 1519 // Type Predicates. 1520 //===--------------------------------------------------------------------===// 1521 1522public: 1523 /// \brief Return one of the GCNone, Weak or Strong Objective-C garbage 1524 /// collection attributes. 1525 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1526 1527 /// \brief Return true if the given vector types are of the same unqualified 1528 /// type or if they are equivalent to the same GCC vector type. 1529 /// 1530 /// \note This ignores whether they are target-specific (AltiVec or Neon) 1531 /// types. 1532 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1533 1534 /// \brief Return true if this is an \c NSObject object with its \c NSObject 1535 /// attribute set. 1536 static bool isObjCNSObjectType(QualType Ty) { 1537 return Ty->isObjCNSObjectType(); 1538 } 1539 1540 //===--------------------------------------------------------------------===// 1541 // Type Sizing and Analysis 1542 //===--------------------------------------------------------------------===// 1543 1544 /// \brief Return the APFloat 'semantics' for the specified scalar floating 1545 /// point type. 1546 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1547 1548 /// \brief Get the size and alignment of the specified complete type in bits. 1549 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1550 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1551 return getTypeInfo(T.getTypePtr()); 1552 } 1553 1554 /// \brief Return the size of the specified (complete) type \p T, in bits. 1555 uint64_t getTypeSize(QualType T) const { 1556 return getTypeInfo(T).first; 1557 } 1558 uint64_t getTypeSize(const Type *T) const { 1559 return getTypeInfo(T).first; 1560 } 1561 1562 /// \brief Return the size of the character type, in bits. 1563 uint64_t getCharWidth() const { 1564 return getTypeSize(CharTy); 1565 } 1566 1567 /// \brief Convert a size in bits to a size in characters. 1568 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1569 1570 /// \brief Convert a size in characters to a size in bits. 1571 int64_t toBits(CharUnits CharSize) const; 1572 1573 /// \brief Return the size of the specified (complete) type \p T, in 1574 /// characters. 1575 CharUnits getTypeSizeInChars(QualType T) const; 1576 CharUnits getTypeSizeInChars(const Type *T) const; 1577 1578 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1579 /// bits. 1580 unsigned getTypeAlign(QualType T) const { 1581 return getTypeInfo(T).second; 1582 } 1583 unsigned getTypeAlign(const Type *T) const { 1584 return getTypeInfo(T).second; 1585 } 1586 1587 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1588 /// characters. 1589 CharUnits getTypeAlignInChars(QualType T) const; 1590 CharUnits getTypeAlignInChars(const Type *T) const; 1591 1592 // getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the 1593 // type is a record, its data size is returned. 1594 std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const; 1595 1596 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1597 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1598 1599 /// \brief Return the "preferred" alignment of the specified type \p T for 1600 /// the current target, in bits. 1601 /// 1602 /// This can be different than the ABI alignment in cases where it is 1603 /// beneficial for performance to overalign a data type. 1604 unsigned getPreferredTypeAlign(const Type *T) const; 1605 1606 /// \brief Return the alignment in bits that should be given to a 1607 /// global variable with type \p T. 1608 unsigned getAlignOfGlobalVar(QualType T) const; 1609 1610 /// \brief Return the alignment in characters that should be given to a 1611 /// global variable with type \p T. 1612 CharUnits getAlignOfGlobalVarInChars(QualType T) const; 1613 1614 /// \brief Return a conservative estimate of the alignment of the specified 1615 /// decl \p D. 1616 /// 1617 /// \pre \p D must not be a bitfield type, as bitfields do not have a valid 1618 /// alignment. 1619 /// 1620 /// If \p RefAsPointee, references are treated like their underlying type 1621 /// (for alignof), else they're treated like pointers (for CodeGen). 1622 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1623 1624 /// \brief Get or compute information about the layout of the specified 1625 /// record (struct/union/class) \p D, which indicates its size and field 1626 /// position information. 1627 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1628 1629 /// \brief Get or compute information about the layout of the specified 1630 /// Objective-C interface. 1631 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1632 const; 1633 1634 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1635 bool Simple = false) const; 1636 1637 /// \brief Get or compute information about the layout of the specified 1638 /// Objective-C implementation. 1639 /// 1640 /// This may differ from the interface if synthesized ivars are present. 1641 const ASTRecordLayout & 1642 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1643 1644 /// \brief Get our current best idea for the key function of the 1645 /// given record decl, or NULL if there isn't one. 1646 /// 1647 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 1648 /// ...the first non-pure virtual function that is not inline at the 1649 /// point of class definition. 1650 /// 1651 /// Other ABIs use the same idea. However, the ARM C++ ABI ignores 1652 /// virtual functions that are defined 'inline', which means that 1653 /// the result of this computation can change. 1654 const CXXMethodDecl *getCurrentKeyFunction(const CXXRecordDecl *RD); 1655 1656 /// \brief Observe that the given method cannot be a key function. 1657 /// Checks the key-function cache for the method's class and clears it 1658 /// if matches the given declaration. 1659 /// 1660 /// This is used in ABIs where out-of-line definitions marked 1661 /// inline are not considered to be key functions. 1662 /// 1663 /// \param method should be the declaration from the class definition 1664 void setNonKeyFunction(const CXXMethodDecl *method); 1665 1666 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1667 uint64_t getFieldOffset(const ValueDecl *FD) const; 1668 1669 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1670 1671 MangleContext *createMangleContext(); 1672 1673 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1674 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1675 1676 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1677 void CollectInheritedProtocols(const Decl *CDecl, 1678 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1679 1680 //===--------------------------------------------------------------------===// 1681 // Type Operators 1682 //===--------------------------------------------------------------------===// 1683 1684 /// \brief Return the canonical (structural) type corresponding to the 1685 /// specified potentially non-canonical type \p T. 1686 /// 1687 /// The non-canonical version of a type may have many "decorated" versions of 1688 /// types. Decorators can include typedefs, 'typeof' operators, etc. The 1689 /// returned type is guaranteed to be free of any of these, allowing two 1690 /// canonical types to be compared for exact equality with a simple pointer 1691 /// comparison. 1692 CanQualType getCanonicalType(QualType T) const { 1693 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1694 } 1695 1696 const Type *getCanonicalType(const Type *T) const { 1697 return T->getCanonicalTypeInternal().getTypePtr(); 1698 } 1699 1700 /// \brief Return the canonical parameter type corresponding to the specific 1701 /// potentially non-canonical one. 1702 /// 1703 /// Qualifiers are stripped off, functions are turned into function 1704 /// pointers, and arrays decay one level into pointers. 1705 CanQualType getCanonicalParamType(QualType T) const; 1706 1707 /// \brief Determine whether the given types \p T1 and \p T2 are equivalent. 1708 bool hasSameType(QualType T1, QualType T2) const { 1709 return getCanonicalType(T1) == getCanonicalType(T2); 1710 } 1711 1712 /// \brief Return this type as a completely-unqualified array type, 1713 /// capturing the qualifiers in \p Quals. 1714 /// 1715 /// This will remove the minimal amount of sugaring from the types, similar 1716 /// to the behavior of QualType::getUnqualifiedType(). 1717 /// 1718 /// \param T is the qualified type, which may be an ArrayType 1719 /// 1720 /// \param Quals will receive the full set of qualifiers that were 1721 /// applied to the array. 1722 /// 1723 /// \returns if this is an array type, the completely unqualified array type 1724 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1725 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1726 1727 /// \brief Determine whether the given types are equivalent after 1728 /// cvr-qualifiers have been removed. 1729 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1730 return getCanonicalType(T1).getTypePtr() == 1731 getCanonicalType(T2).getTypePtr(); 1732 } 1733 1734 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1735 1736 /// \brief Retrieves the "canonical" nested name specifier for a 1737 /// given nested name specifier. 1738 /// 1739 /// The canonical nested name specifier is a nested name specifier 1740 /// that uniquely identifies a type or namespace within the type 1741 /// system. For example, given: 1742 /// 1743 /// \code 1744 /// namespace N { 1745 /// struct S { 1746 /// template<typename T> struct X { typename T* type; }; 1747 /// }; 1748 /// } 1749 /// 1750 /// template<typename T> struct Y { 1751 /// typename N::S::X<T>::type member; 1752 /// }; 1753 /// \endcode 1754 /// 1755 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1756 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1757 /// by declarations in the type system and the canonical type for 1758 /// the template type parameter 'T' is template-param-0-0. 1759 NestedNameSpecifier * 1760 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1761 1762 /// \brief Retrieves the default calling convention to use for 1763 /// C++ instance methods. 1764 CallingConv getDefaultCXXMethodCallConv(bool isVariadic); 1765 1766 /// \brief Retrieves the canonical representation of the given 1767 /// calling convention. 1768 CallingConv getCanonicalCallConv(CallingConv CC) const; 1769 1770 /// \brief Determines whether two calling conventions name the same 1771 /// calling convention. 1772 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1773 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1774 } 1775 1776 /// \brief Retrieves the "canonical" template name that refers to a 1777 /// given template. 1778 /// 1779 /// The canonical template name is the simplest expression that can 1780 /// be used to refer to a given template. For most templates, this 1781 /// expression is just the template declaration itself. For example, 1782 /// the template std::vector can be referred to via a variety of 1783 /// names---std::vector, \::std::vector, vector (if vector is in 1784 /// scope), etc.---but all of these names map down to the same 1785 /// TemplateDecl, which is used to form the canonical template name. 1786 /// 1787 /// Dependent template names are more interesting. Here, the 1788 /// template name could be something like T::template apply or 1789 /// std::allocator<T>::template rebind, where the nested name 1790 /// specifier itself is dependent. In this case, the canonical 1791 /// template name uses the shortest form of the dependent 1792 /// nested-name-specifier, which itself contains all canonical 1793 /// types, values, and templates. 1794 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1795 1796 /// \brief Determine whether the given template names refer to the same 1797 /// template. 1798 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1799 1800 /// \brief Retrieve the "canonical" template argument. 1801 /// 1802 /// The canonical template argument is the simplest template argument 1803 /// (which may be a type, value, expression, or declaration) that 1804 /// expresses the value of the argument. 1805 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1806 const; 1807 1808 /// Type Query functions. If the type is an instance of the specified class, 1809 /// return the Type pointer for the underlying maximally pretty type. This 1810 /// is a member of ASTContext because this may need to do some amount of 1811 /// canonicalization, e.g. to move type qualifiers into the element type. 1812 const ArrayType *getAsArrayType(QualType T) const; 1813 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1814 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1815 } 1816 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1817 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1818 } 1819 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1820 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1821 } 1822 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1823 const { 1824 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1825 } 1826 1827 /// \brief Return the innermost element type of an array type. 1828 /// 1829 /// For example, will return "int" for int[m][n] 1830 QualType getBaseElementType(const ArrayType *VAT) const; 1831 1832 /// \brief Return the innermost element type of a type (which needn't 1833 /// actually be an array type). 1834 QualType getBaseElementType(QualType QT) const; 1835 1836 /// \brief Return number of constant array elements. 1837 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1838 1839 /// \brief Perform adjustment on the parameter type of a function. 1840 /// 1841 /// This routine adjusts the given parameter type @p T to the actual 1842 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1843 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1844 QualType getAdjustedParameterType(QualType T) const; 1845 1846 /// \brief Retrieve the parameter type as adjusted for use in the signature 1847 /// of a function, decaying array and function types and removing top-level 1848 /// cv-qualifiers. 1849 QualType getSignatureParameterType(QualType T) const; 1850 1851 /// \brief Return the properly qualified result of decaying the specified 1852 /// array type to a pointer. 1853 /// 1854 /// This operation is non-trivial when handling typedefs etc. The canonical 1855 /// type of \p T must be an array type, this returns a pointer to a properly 1856 /// qualified element of the array. 1857 /// 1858 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1859 QualType getArrayDecayedType(QualType T) const; 1860 1861 /// \brief Return the type that \p PromotableType will promote to: C99 1862 /// 6.3.1.1p2, assuming that \p PromotableType is a promotable integer type. 1863 QualType getPromotedIntegerType(QualType PromotableType) const; 1864 1865 /// \brief Recurses in pointer/array types until it finds an Objective-C 1866 /// retainable type and returns its ownership. 1867 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1868 1869 /// \brief Whether this is a promotable bitfield reference according 1870 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1871 /// 1872 /// \returns the type this bit-field will promote to, or NULL if no 1873 /// promotion occurs. 1874 QualType isPromotableBitField(Expr *E) const; 1875 1876 /// \brief Return the highest ranked integer type, see C99 6.3.1.8p1. 1877 /// 1878 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1879 /// \p LHS < \p RHS, return -1. 1880 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1881 1882 /// \brief Compare the rank of the two specified floating point types, 1883 /// ignoring the domain of the type (i.e. 'double' == '_Complex double'). 1884 /// 1885 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1886 /// \p LHS < \p RHS, return -1. 1887 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1888 1889 /// \brief Return a real floating point or a complex type (based on 1890 /// \p typeDomain/\p typeSize). 1891 /// 1892 /// \param typeDomain a real floating point or complex type. 1893 /// \param typeSize a real floating point or complex type. 1894 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1895 QualType typeDomain) const; 1896 1897 unsigned getTargetAddressSpace(QualType T) const { 1898 return getTargetAddressSpace(T.getQualifiers()); 1899 } 1900 1901 unsigned getTargetAddressSpace(Qualifiers Q) const { 1902 return getTargetAddressSpace(Q.getAddressSpace()); 1903 } 1904 1905 unsigned getTargetAddressSpace(unsigned AS) const { 1906 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1907 return AS; 1908 else 1909 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1910 } 1911 1912private: 1913 // Helper for integer ordering 1914 unsigned getIntegerRank(const Type *T) const; 1915 1916public: 1917 1918 //===--------------------------------------------------------------------===// 1919 // Type Compatibility Predicates 1920 //===--------------------------------------------------------------------===// 1921 1922 /// Compatibility predicates used to check assignment expressions. 1923 bool typesAreCompatible(QualType T1, QualType T2, 1924 bool CompareUnqualified = false); // C99 6.2.7p1 1925 1926 bool propertyTypesAreCompatible(QualType, QualType); 1927 bool typesAreBlockPointerCompatible(QualType, QualType); 1928 1929 bool isObjCIdType(QualType T) const { 1930 return T == getObjCIdType(); 1931 } 1932 bool isObjCClassType(QualType T) const { 1933 return T == getObjCClassType(); 1934 } 1935 bool isObjCSelType(QualType T) const { 1936 return T == getObjCSelType(); 1937 } 1938 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1939 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1940 bool ForCompare); 1941 1942 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1943 1944 // Check the safety of assignment from LHS to RHS 1945 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1946 const ObjCObjectPointerType *RHSOPT); 1947 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1948 const ObjCObjectType *RHS); 1949 bool canAssignObjCInterfacesInBlockPointer( 1950 const ObjCObjectPointerType *LHSOPT, 1951 const ObjCObjectPointerType *RHSOPT, 1952 bool BlockReturnType); 1953 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1954 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1955 const ObjCObjectPointerType *RHSOPT); 1956 bool canBindObjCObjectType(QualType To, QualType From); 1957 1958 // Functions for calculating composite types 1959 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1960 bool Unqualified = false, bool BlockReturnType = false); 1961 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1962 bool Unqualified = false); 1963 QualType mergeFunctionArgumentTypes(QualType, QualType, 1964 bool OfBlockPointer=false, 1965 bool Unqualified = false); 1966 QualType mergeTransparentUnionType(QualType, QualType, 1967 bool OfBlockPointer=false, 1968 bool Unqualified = false); 1969 1970 QualType mergeObjCGCQualifiers(QualType, QualType); 1971 1972 bool FunctionTypesMatchOnNSConsumedAttrs( 1973 const FunctionProtoType *FromFunctionType, 1974 const FunctionProtoType *ToFunctionType); 1975 1976 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1977 ObjCLayouts[CD] = 0; 1978 } 1979 1980 //===--------------------------------------------------------------------===// 1981 // Integer Predicates 1982 //===--------------------------------------------------------------------===// 1983 1984 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1985 // of bits in an integer type excluding any padding bits. 1986 unsigned getIntWidth(QualType T) const; 1987 1988 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1989 // unsigned integer type. This method takes a signed type, and returns the 1990 // corresponding unsigned integer type. 1991 QualType getCorrespondingUnsignedType(QualType T) const; 1992 1993 //===--------------------------------------------------------------------===// 1994 // Type Iterators. 1995 //===--------------------------------------------------------------------===// 1996 1997 typedef SmallVectorImpl<Type *>::iterator type_iterator; 1998 typedef SmallVectorImpl<Type *>::const_iterator const_type_iterator; 1999 2000 type_iterator types_begin() { return Types.begin(); } 2001 type_iterator types_end() { return Types.end(); } 2002 const_type_iterator types_begin() const { return Types.begin(); } 2003 const_type_iterator types_end() const { return Types.end(); } 2004 2005 //===--------------------------------------------------------------------===// 2006 // Integer Values 2007 //===--------------------------------------------------------------------===// 2008 2009 /// \brief Make an APSInt of the appropriate width and signedness for the 2010 /// given \p Value and integer \p Type. 2011 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 2012 llvm::APSInt Res(getIntWidth(Type), 2013 !Type->isSignedIntegerOrEnumerationType()); 2014 Res = Value; 2015 return Res; 2016 } 2017 2018 bool isSentinelNullExpr(const Expr *E); 2019 2020 /// \brief Get the implementation of the ObjCInterfaceDecl \p D, or NULL if 2021 /// none exists. 2022 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 2023 /// \brief Get the implementation of the ObjCCategoryDecl \p D, or NULL if 2024 /// none exists. 2025 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 2026 2027 /// \brief Return true if there is at least one \@implementation in the TU. 2028 bool AnyObjCImplementation() { 2029 return !ObjCImpls.empty(); 2030 } 2031 2032 /// \brief Set the implementation of ObjCInterfaceDecl. 2033 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 2034 ObjCImplementationDecl *ImplD); 2035 /// \brief Set the implementation of ObjCCategoryDecl. 2036 void setObjCImplementation(ObjCCategoryDecl *CatD, 2037 ObjCCategoryImplDecl *ImplD); 2038 2039 /// \brief Get the duplicate declaration of a ObjCMethod in the same 2040 /// interface, or null if none exists. 2041 const ObjCMethodDecl *getObjCMethodRedeclaration( 2042 const ObjCMethodDecl *MD) const { 2043 return ObjCMethodRedecls.lookup(MD); 2044 } 2045 2046 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 2047 const ObjCMethodDecl *Redecl) { 2048 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 2049 ObjCMethodRedecls[MD] = Redecl; 2050 } 2051 2052 /// \brief Returns the Objective-C interface that \p ND belongs to if it is 2053 /// an Objective-C method/property/ivar etc. that is part of an interface, 2054 /// otherwise returns null. 2055 const ObjCInterfaceDecl *getObjContainingInterface(const NamedDecl *ND) const; 2056 2057 /// \brief Set the copy inialization expression of a block var decl. 2058 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 2059 /// \brief Get the copy initialization expression of the VarDecl \p VD, or 2060 /// NULL if none exists. 2061 Expr *getBlockVarCopyInits(const VarDecl* VD); 2062 2063 /// \brief Allocate an uninitialized TypeSourceInfo. 2064 /// 2065 /// The caller should initialize the memory held by TypeSourceInfo using 2066 /// the TypeLoc wrappers. 2067 /// 2068 /// \param T the type that will be the basis for type source info. This type 2069 /// should refer to how the declarator was written in source code, not to 2070 /// what type semantic analysis resolved the declarator to. 2071 /// 2072 /// \param Size the size of the type info to create, or 0 if the size 2073 /// should be calculated based on the type. 2074 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 2075 2076 /// \brief Allocate a TypeSourceInfo where all locations have been 2077 /// initialized to a given location, which defaults to the empty 2078 /// location. 2079 TypeSourceInfo * 2080 getTrivialTypeSourceInfo(QualType T, 2081 SourceLocation Loc = SourceLocation()) const; 2082 2083 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 2084 2085 /// \brief Add a deallocation callback that will be invoked when the 2086 /// ASTContext is destroyed. 2087 /// 2088 /// \param Callback A callback function that will be invoked on destruction. 2089 /// 2090 /// \param Data Pointer data that will be provided to the callback function 2091 /// when it is called. 2092 void AddDeallocation(void (*Callback)(void*), void *Data); 2093 2094 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 2095 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 2096 2097 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 2098 /// lazily, only when used; this is only relevant for function or file scoped 2099 /// var definitions. 2100 /// 2101 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 2102 /// it is not used. 2103 bool DeclMustBeEmitted(const Decl *D); 2104 2105 void addUnnamedTag(const TagDecl *Tag); 2106 int getUnnamedTagManglingNumber(const TagDecl *Tag) const; 2107 2108 /// \brief Retrieve the lambda mangling number for a lambda expression. 2109 unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator); 2110 2111 /// \brief Used by ParmVarDecl to store on the side the 2112 /// index of the parameter when it exceeds the size of the normal bitfield. 2113 void setParameterIndex(const ParmVarDecl *D, unsigned index); 2114 2115 /// \brief Used by ParmVarDecl to retrieve on the side the 2116 /// index of the parameter when it exceeds the size of the normal bitfield. 2117 unsigned getParameterIndex(const ParmVarDecl *D) const; 2118 2119 //===--------------------------------------------------------------------===// 2120 // Statistics 2121 //===--------------------------------------------------------------------===// 2122 2123 /// \brief The number of implicitly-declared default constructors. 2124 static unsigned NumImplicitDefaultConstructors; 2125 2126 /// \brief The number of implicitly-declared default constructors for 2127 /// which declarations were built. 2128 static unsigned NumImplicitDefaultConstructorsDeclared; 2129 2130 /// \brief The number of implicitly-declared copy constructors. 2131 static unsigned NumImplicitCopyConstructors; 2132 2133 /// \brief The number of implicitly-declared copy constructors for 2134 /// which declarations were built. 2135 static unsigned NumImplicitCopyConstructorsDeclared; 2136 2137 /// \brief The number of implicitly-declared move constructors. 2138 static unsigned NumImplicitMoveConstructors; 2139 2140 /// \brief The number of implicitly-declared move constructors for 2141 /// which declarations were built. 2142 static unsigned NumImplicitMoveConstructorsDeclared; 2143 2144 /// \brief The number of implicitly-declared copy assignment operators. 2145 static unsigned NumImplicitCopyAssignmentOperators; 2146 2147 /// \brief The number of implicitly-declared copy assignment operators for 2148 /// which declarations were built. 2149 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 2150 2151 /// \brief The number of implicitly-declared move assignment operators. 2152 static unsigned NumImplicitMoveAssignmentOperators; 2153 2154 /// \brief The number of implicitly-declared move assignment operators for 2155 /// which declarations were built. 2156 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 2157 2158 /// \brief The number of implicitly-declared destructors. 2159 static unsigned NumImplicitDestructors; 2160 2161 /// \brief The number of implicitly-declared destructors for which 2162 /// declarations were built. 2163 static unsigned NumImplicitDestructorsDeclared; 2164 2165private: 2166 ASTContext(const ASTContext &) LLVM_DELETED_FUNCTION; 2167 void operator=(const ASTContext &) LLVM_DELETED_FUNCTION; 2168 2169public: 2170 /// \brief Initialize built-in types. 2171 /// 2172 /// This routine may only be invoked once for a given ASTContext object. 2173 /// It is normally invoked by the ASTContext constructor. However, the 2174 /// constructor can be asked to delay initialization, which places the burden 2175 /// of calling this function on the user of that object. 2176 /// 2177 /// \param Target The target 2178 void InitBuiltinTypes(const TargetInfo &Target); 2179 2180private: 2181 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 2182 2183 // Return the Objective-C type encoding for a given type. 2184 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 2185 bool ExpandPointedToStructures, 2186 bool ExpandStructures, 2187 const FieldDecl *Field, 2188 bool OutermostType = false, 2189 bool EncodingProperty = false, 2190 bool StructField = false, 2191 bool EncodeBlockParameters = false, 2192 bool EncodeClassNames = false, 2193 bool EncodePointerToObjCTypedef = false) const; 2194 2195 // Adds the encoding of the structure's members. 2196 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 2197 const FieldDecl *Field, 2198 bool includeVBases = true) const; 2199 2200 // Adds the encoding of a method parameter or return type. 2201 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 2202 QualType T, std::string& S, 2203 bool Extended) const; 2204 2205 const ASTRecordLayout & 2206 getObjCLayout(const ObjCInterfaceDecl *D, 2207 const ObjCImplementationDecl *Impl) const; 2208 2209private: 2210 /// \brief A set of deallocations that should be performed when the 2211 /// ASTContext is destroyed. 2212 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 2213 2214 // FIXME: This currently contains the set of StoredDeclMaps used 2215 // by DeclContext objects. This probably should not be in ASTContext, 2216 // but we include it here so that ASTContext can quickly deallocate them. 2217 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 2218 2219 /// \brief A counter used to uniquely identify "blocks". 2220 mutable unsigned int UniqueBlockByRefTypeID; 2221 2222 friend class DeclContext; 2223 friend class DeclarationNameTable; 2224 void ReleaseDeclContextMaps(); 2225 2226 /// \brief A \c RecursiveASTVisitor that builds a map from nodes to their 2227 /// parents as defined by the \c RecursiveASTVisitor. 2228 /// 2229 /// Note that the relationship described here is purely in terms of AST 2230 /// traversal - there are other relationships (for example declaration context) 2231 /// in the AST that are better modeled by special matchers. 2232 /// 2233 /// FIXME: Currently only builds up the map using \c Stmt and \c Decl nodes. 2234 class ParentMapASTVisitor : public RecursiveASTVisitor<ParentMapASTVisitor> { 2235 public: 2236 /// \brief Builds and returns the translation unit's parent map. 2237 /// 2238 /// The caller takes ownership of the returned \c ParentMap. 2239 static ParentMap *buildMap(TranslationUnitDecl &TU) { 2240 ParentMapASTVisitor Visitor(new ParentMap); 2241 Visitor.TraverseDecl(&TU); 2242 return Visitor.Parents; 2243 } 2244 2245 private: 2246 typedef RecursiveASTVisitor<ParentMapASTVisitor> VisitorBase; 2247 2248 ParentMapASTVisitor(ParentMap *Parents) : Parents(Parents) { 2249 } 2250 2251 bool shouldVisitTemplateInstantiations() const { 2252 return true; 2253 } 2254 bool shouldVisitImplicitCode() const { 2255 return true; 2256 } 2257 // Disables data recursion. We intercept Traverse* methods in the RAV, which 2258 // are not triggered during data recursion. 2259 bool shouldUseDataRecursionFor(clang::Stmt *S) const { 2260 return false; 2261 } 2262 2263 template <typename T> 2264 bool TraverseNode(T *Node, bool(VisitorBase:: *traverse) (T *)) { 2265 if (Node == NULL) 2266 return true; 2267 if (ParentStack.size() > 0) 2268 // FIXME: Currently we add the same parent multiple times, for example 2269 // when we visit all subexpressions of template instantiations; this is 2270 // suboptimal, bug benign: the only way to visit those is with 2271 // hasAncestor / hasParent, and those do not create new matches. 2272 // The plan is to enable DynTypedNode to be storable in a map or hash 2273 // map. The main problem there is to implement hash functions / 2274 // comparison operators for all types that DynTypedNode supports that 2275 // do not have pointer identity. 2276 (*Parents)[Node].push_back(ParentStack.back()); 2277 ParentStack.push_back(ast_type_traits::DynTypedNode::create(*Node)); 2278 bool Result = (this ->* traverse) (Node); 2279 ParentStack.pop_back(); 2280 return Result; 2281 } 2282 2283 bool TraverseDecl(Decl *DeclNode) { 2284 return TraverseNode(DeclNode, &VisitorBase::TraverseDecl); 2285 } 2286 2287 bool TraverseStmt(Stmt *StmtNode) { 2288 return TraverseNode(StmtNode, &VisitorBase::TraverseStmt); 2289 } 2290 2291 ParentMap *Parents; 2292 llvm::SmallVector<ast_type_traits::DynTypedNode, 16> ParentStack; 2293 2294 friend class RecursiveASTVisitor<ParentMapASTVisitor>; 2295 }; 2296 2297 llvm::OwningPtr<ParentMap> AllParents; 2298}; 2299 2300/// \brief Utility function for constructing a nullary selector. 2301static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 2302 IdentifierInfo* II = &Ctx.Idents.get(name); 2303 return Ctx.Selectors.getSelector(0, &II); 2304} 2305 2306/// \brief Utility function for constructing an unary selector. 2307static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 2308 IdentifierInfo* II = &Ctx.Idents.get(name); 2309 return Ctx.Selectors.getSelector(1, &II); 2310} 2311 2312} // end namespace clang 2313 2314// operator new and delete aren't allowed inside namespaces. 2315 2316/// @brief Placement new for using the ASTContext's allocator. 2317/// 2318/// This placement form of operator new uses the ASTContext's allocator for 2319/// obtaining memory. 2320/// 2321/// IMPORTANT: These are also declared in clang/AST/AttrIterator.h! Any changes 2322/// here need to also be made there. 2323/// 2324/// We intentionally avoid using a nothrow specification here so that the calls 2325/// to this operator will not perform a null check on the result -- the 2326/// underlying allocator never returns null pointers. 2327/// 2328/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2329/// @code 2330/// // Default alignment (8) 2331/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 2332/// // Specific alignment 2333/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 2334/// @endcode 2335/// Please note that you cannot use delete on the pointer; it must be 2336/// deallocated using an explicit destructor call followed by 2337/// @c Context.Deallocate(Ptr). 2338/// 2339/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2340/// @param C The ASTContext that provides the allocator. 2341/// @param Alignment The alignment of the allocated memory (if the underlying 2342/// allocator supports it). 2343/// @return The allocated memory. Could be NULL. 2344inline void *operator new(size_t Bytes, const clang::ASTContext &C, 2345 size_t Alignment) { 2346 return C.Allocate(Bytes, Alignment); 2347} 2348/// @brief Placement delete companion to the new above. 2349/// 2350/// This operator is just a companion to the new above. There is no way of 2351/// invoking it directly; see the new operator for more details. This operator 2352/// is called implicitly by the compiler if a placement new expression using 2353/// the ASTContext throws in the object constructor. 2354inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 2355 C.Deallocate(Ptr); 2356} 2357 2358/// This placement form of operator new[] uses the ASTContext's allocator for 2359/// obtaining memory. 2360/// 2361/// We intentionally avoid using a nothrow specification here so that the calls 2362/// to this operator will not perform a null check on the result -- the 2363/// underlying allocator never returns null pointers. 2364/// 2365/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2366/// @code 2367/// // Default alignment (8) 2368/// char *data = new (Context) char[10]; 2369/// // Specific alignment 2370/// char *data = new (Context, 4) char[10]; 2371/// @endcode 2372/// Please note that you cannot use delete on the pointer; it must be 2373/// deallocated using an explicit destructor call followed by 2374/// @c Context.Deallocate(Ptr). 2375/// 2376/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2377/// @param C The ASTContext that provides the allocator. 2378/// @param Alignment The alignment of the allocated memory (if the underlying 2379/// allocator supports it). 2380/// @return The allocated memory. Could be NULL. 2381inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2382 size_t Alignment = 8) { 2383 return C.Allocate(Bytes, Alignment); 2384} 2385 2386/// @brief Placement delete[] companion to the new[] above. 2387/// 2388/// This operator is just a companion to the new[] above. There is no way of 2389/// invoking it directly; see the new[] operator for more details. This operator 2390/// is called implicitly by the compiler if a placement new[] expression using 2391/// the ASTContext throws in the object constructor. 2392inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2393 C.Deallocate(Ptr); 2394} 2395 2396#endif 2397