ASTContext.h revision 1c56c9d9c2eed9ade88afe93541cc6fd25932355
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/MangleNumberingContext.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/PrettyPrinter.h" 25#include "clang/AST/RawCommentList.h" 26#include "clang/AST/TemplateName.h" 27#include "clang/AST/Type.h" 28#include "clang/Basic/AddressSpaces.h" 29#include "clang/Basic/IdentifierTable.h" 30#include "clang/Basic/LangOptions.h" 31#include "clang/Basic/OperatorKinds.h" 32#include "clang/Basic/PartialDiagnostic.h" 33#include "clang/Basic/VersionTuple.h" 34#include "llvm/ADT/DenseMap.h" 35#include "llvm/ADT/FoldingSet.h" 36#include "llvm/ADT/IntrusiveRefCntPtr.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/TinyPtrVector.h" 40#include "llvm/Support/Allocator.h" 41#include <vector> 42 43namespace llvm { 44 struct fltSemantics; 45} 46 47namespace clang { 48 class FileManager; 49 class AtomicExpr; 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 MaterializeTemporaryExpr; 59 class SelectorTable; 60 class TargetInfo; 61 class CXXABI; 62 // Decls 63 class MangleContext; 64 class ObjCIvarDecl; 65 class ObjCPropertyDecl; 66 class UnresolvedSetIterator; 67 class UsingDecl; 68 class UsingShadowDecl; 69 70 namespace Builtin { class Context; } 71 72 namespace comments { 73 class FullComment; 74 } 75 76/// \brief Holds long-lived AST nodes (such as types and decls) that can be 77/// referred to throughout the semantic analysis of a file. 78class ASTContext : public RefCountedBase<ASTContext> { 79 ASTContext &this_() { return *this; } 80 81 mutable SmallVector<Type *, 0> Types; 82 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 83 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 84 mutable llvm::FoldingSet<PointerType> PointerTypes; 85 mutable llvm::FoldingSet<DecayedType> DecayedTypes; 86 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 87 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 88 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 89 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 90 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 91 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 92 mutable std::vector<VariableArrayType*> VariableArrayTypes; 93 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 94 mutable llvm::FoldingSet<DependentSizedExtVectorType> 95 DependentSizedExtVectorTypes; 96 mutable llvm::FoldingSet<VectorType> VectorTypes; 97 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 98 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 99 FunctionProtoTypes; 100 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 101 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 102 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 103 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 104 SubstTemplateTypeParmTypes; 105 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 106 SubstTemplateTypeParmPackTypes; 107 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 108 TemplateSpecializationTypes; 109 mutable llvm::FoldingSet<ParenType> ParenTypes; 110 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 111 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 112 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 113 ASTContext&> 114 DependentTemplateSpecializationTypes; 115 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 116 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 117 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 118 mutable llvm::FoldingSet<AutoType> AutoTypes; 119 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 120 llvm::FoldingSet<AttributedType> AttributedTypes; 121 122 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 123 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 124 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 125 SubstTemplateTemplateParms; 126 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 127 ASTContext&> 128 SubstTemplateTemplateParmPacks; 129 130 /// \brief The set of nested name specifiers. 131 /// 132 /// This set is managed by the NestedNameSpecifier class. 133 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 134 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 135 friend class NestedNameSpecifier; 136 137 /// \brief A cache mapping from RecordDecls to ASTRecordLayouts. 138 /// 139 /// This is lazily created. This is intentionally not serialized. 140 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 141 ASTRecordLayouts; 142 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 143 ObjCLayouts; 144 145 /// \brief A cache from types to size and alignment information. 146 typedef llvm::DenseMap<const Type*, 147 std::pair<uint64_t, unsigned> > TypeInfoMap; 148 mutable TypeInfoMap MemoizedTypeInfo; 149 150 /// \brief A cache mapping from CXXRecordDecls to key functions. 151 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 152 153 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 154 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 155 156 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 157 /// interface. 158 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 159 160 /// \brief Mapping from __block VarDecls to their copy initialization expr. 161 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 162 163 /// \brief Mapping from class scope functions specialization to their 164 /// template patterns. 165 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 166 ClassScopeSpecializationPattern; 167 168 /// \brief Mapping from materialized temporaries with static storage duration 169 /// that appear in constant initializers to their evaluated values. 170 llvm::DenseMap<const MaterializeTemporaryExpr*, APValue> 171 MaterializedTemporaryValues; 172 173 /// \brief Representation of a "canonical" template template parameter that 174 /// is used in canonical template names. 175 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 176 TemplateTemplateParmDecl *Parm; 177 178 public: 179 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 180 : Parm(Parm) { } 181 182 TemplateTemplateParmDecl *getParam() const { return Parm; } 183 184 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 185 186 static void Profile(llvm::FoldingSetNodeID &ID, 187 TemplateTemplateParmDecl *Parm); 188 }; 189 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 190 CanonTemplateTemplateParms; 191 192 TemplateTemplateParmDecl * 193 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 194 195 /// \brief The typedef for the __int128_t type. 196 mutable TypedefDecl *Int128Decl; 197 198 /// \brief The typedef for the __uint128_t type. 199 mutable TypedefDecl *UInt128Decl; 200 201 /// \brief The typedef for the __float128 stub type. 202 mutable TypeDecl *Float128StubDecl; 203 204 /// \brief The typedef for the target specific predefined 205 /// __builtin_va_list type. 206 mutable TypedefDecl *BuiltinVaListDecl; 207 208 /// \brief The typedef for the predefined \c id type. 209 mutable TypedefDecl *ObjCIdDecl; 210 211 /// \brief The typedef for the predefined \c SEL type. 212 mutable TypedefDecl *ObjCSelDecl; 213 214 /// \brief The typedef for the predefined \c Class type. 215 mutable TypedefDecl *ObjCClassDecl; 216 217 /// \brief The typedef for the predefined \c Protocol class in Objective-C. 218 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 219 220 /// \brief The typedef for the predefined 'BOOL' type. 221 mutable TypedefDecl *BOOLDecl; 222 223 // Typedefs which may be provided defining the structure of Objective-C 224 // pseudo-builtins 225 QualType ObjCIdRedefinitionType; 226 QualType ObjCClassRedefinitionType; 227 QualType ObjCSelRedefinitionType; 228 229 QualType ObjCConstantStringType; 230 mutable RecordDecl *CFConstantStringTypeDecl; 231 232 mutable QualType ObjCSuperType; 233 234 QualType ObjCNSStringType; 235 236 /// \brief The typedef declaration for the Objective-C "instancetype" type. 237 TypedefDecl *ObjCInstanceTypeDecl; 238 239 /// \brief The type for the C FILE type. 240 TypeDecl *FILEDecl; 241 242 /// \brief The type for the C jmp_buf type. 243 TypeDecl *jmp_bufDecl; 244 245 /// \brief The type for the C sigjmp_buf type. 246 TypeDecl *sigjmp_bufDecl; 247 248 /// \brief The type for the C ucontext_t type. 249 TypeDecl *ucontext_tDecl; 250 251 /// \brief Type for the Block descriptor for Blocks CodeGen. 252 /// 253 /// Since this is only used for generation of debug info, it is not 254 /// serialized. 255 mutable RecordDecl *BlockDescriptorType; 256 257 /// \brief Type for the Block descriptor for Blocks CodeGen. 258 /// 259 /// Since this is only used for generation of debug info, it is not 260 /// serialized. 261 mutable RecordDecl *BlockDescriptorExtendedType; 262 263 /// \brief Declaration for the CUDA cudaConfigureCall function. 264 FunctionDecl *cudaConfigureCallDecl; 265 266 TypeSourceInfo NullTypeSourceInfo; 267 268 /// \brief Keeps track of all declaration attributes. 269 /// 270 /// Since so few decls have attrs, we keep them in a hash map instead of 271 /// wasting space in the Decl class. 272 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 273 274public: 275 /// \brief A type synonym for the TemplateOrInstantiation mapping. 276 typedef llvm::PointerUnion<VarTemplateDecl *, MemberSpecializationInfo *> 277 TemplateOrSpecializationInfo; 278 279private: 280 281 /// \brief A mapping to contain the template or declaration that 282 /// a variable declaration describes or was instantiated from, 283 /// respectively. 284 /// 285 /// For non-templates, this value will be NULL. For variable 286 /// declarations that describe a variable template, this will be a 287 /// pointer to a VarTemplateDecl. For static data members 288 /// of class template specializations, this will be the 289 /// MemberSpecializationInfo referring to the member variable that was 290 /// instantiated or specialized. Thus, the mapping will keep track of 291 /// the static data member templates from which static data members of 292 /// class template specializations were instantiated. 293 /// 294 /// Given the following example: 295 /// 296 /// \code 297 /// template<typename T> 298 /// struct X { 299 /// static T value; 300 /// }; 301 /// 302 /// template<typename T> 303 /// T X<T>::value = T(17); 304 /// 305 /// int *x = &X<int>::value; 306 /// \endcode 307 /// 308 /// This mapping will contain an entry that maps from the VarDecl for 309 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 310 /// class template X) and will be marked TSK_ImplicitInstantiation. 311 llvm::DenseMap<const VarDecl *, TemplateOrSpecializationInfo> 312 TemplateOrInstantiation; 313 314 /// \brief Keeps track of the declaration from which a UsingDecl was 315 /// created during instantiation. 316 /// 317 /// The source declaration is always a UsingDecl, an UnresolvedUsingValueDecl, 318 /// or an UnresolvedUsingTypenameDecl. 319 /// 320 /// For example: 321 /// \code 322 /// template<typename T> 323 /// struct A { 324 /// void f(); 325 /// }; 326 /// 327 /// template<typename T> 328 /// struct B : A<T> { 329 /// using A<T>::f; 330 /// }; 331 /// 332 /// template struct B<int>; 333 /// \endcode 334 /// 335 /// This mapping will contain an entry that maps from the UsingDecl in 336 /// B<int> to the UnresolvedUsingDecl in B<T>. 337 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 338 339 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 340 InstantiatedFromUsingShadowDecl; 341 342 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 343 344 /// \brief Mapping that stores the methods overridden by a given C++ 345 /// member function. 346 /// 347 /// Since most C++ member functions aren't virtual and therefore 348 /// don't override anything, we store the overridden functions in 349 /// this map on the side rather than within the CXXMethodDecl structure. 350 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 351 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 352 353 /// \brief Mapping from each declaration context to its corresponding 354 /// mangling numbering context (used for constructs like lambdas which 355 /// need to be consistently numbered for the mangler). 356 llvm::DenseMap<const DeclContext *, MangleNumberingContext> 357 MangleNumberingContexts; 358 359 /// \brief Side-table of mangling numbers for declarations which rarely 360 /// need them (like static local vars). 361 llvm::DenseMap<const NamedDecl *, unsigned> MangleNumbers; 362 363 /// \brief Mapping that stores parameterIndex values for ParmVarDecls when 364 /// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex. 365 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 366 ParameterIndexTable ParamIndices; 367 368 ImportDecl *FirstLocalImport; 369 ImportDecl *LastLocalImport; 370 371 TranslationUnitDecl *TUDecl; 372 373 /// \brief The associated SourceManager object.a 374 SourceManager &SourceMgr; 375 376 /// \brief The language options used to create the AST associated with 377 /// this ASTContext object. 378 LangOptions &LangOpts; 379 380 /// \brief The allocator used to create AST objects. 381 /// 382 /// AST objects are never destructed; rather, all memory associated with the 383 /// AST objects will be released when the ASTContext itself is destroyed. 384 mutable llvm::BumpPtrAllocator BumpAlloc; 385 386 /// \brief Allocator for partial diagnostics. 387 PartialDiagnostic::StorageAllocator DiagAllocator; 388 389 /// \brief The current C++ ABI. 390 OwningPtr<CXXABI> ABI; 391 CXXABI *createCXXABI(const TargetInfo &T); 392 393 /// \brief The logical -> physical address space map. 394 const LangAS::Map *AddrSpaceMap; 395 396 friend class ASTDeclReader; 397 friend class ASTReader; 398 friend class ASTWriter; 399 friend class CXXRecordDecl; 400 401 const TargetInfo *Target; 402 clang::PrintingPolicy PrintingPolicy; 403 404public: 405 IdentifierTable &Idents; 406 SelectorTable &Selectors; 407 Builtin::Context &BuiltinInfo; 408 mutable DeclarationNameTable DeclarationNames; 409 OwningPtr<ExternalASTSource> ExternalSource; 410 ASTMutationListener *Listener; 411 412 /// \brief Contains parents of a node. 413 typedef llvm::SmallVector<ast_type_traits::DynTypedNode, 1> ParentVector; 414 415 /// \brief Maps from a node to its parents. 416 typedef llvm::DenseMap<const void *, ParentVector> ParentMap; 417 418 /// \brief Returns the parents of the given node. 419 /// 420 /// Note that this will lazily compute the parents of all nodes 421 /// and store them for later retrieval. Thus, the first call is O(n) 422 /// in the number of AST nodes. 423 /// 424 /// Caveats and FIXMEs: 425 /// Calculating the parent map over all AST nodes will need to load the 426 /// full AST. This can be undesirable in the case where the full AST is 427 /// expensive to create (for example, when using precompiled header 428 /// preambles). Thus, there are good opportunities for optimization here. 429 /// One idea is to walk the given node downwards, looking for references 430 /// to declaration contexts - once a declaration context is found, compute 431 /// the parent map for the declaration context; if that can satisfy the 432 /// request, loading the whole AST can be avoided. Note that this is made 433 /// more complex by statements in templates having multiple parents - those 434 /// problems can be solved by building closure over the templated parts of 435 /// the AST, which also avoids touching large parts of the AST. 436 /// Additionally, we will want to add an interface to already give a hint 437 /// where to search for the parents, for example when looking at a statement 438 /// inside a certain function. 439 /// 440 /// 'NodeT' can be one of Decl, Stmt, Type, TypeLoc, 441 /// NestedNameSpecifier or NestedNameSpecifierLoc. 442 template <typename NodeT> 443 ParentVector getParents(const NodeT &Node) { 444 return getParents(ast_type_traits::DynTypedNode::create(Node)); 445 } 446 447 ParentVector getParents(const ast_type_traits::DynTypedNode &Node); 448 449 const clang::PrintingPolicy &getPrintingPolicy() const { 450 return PrintingPolicy; 451 } 452 453 void setPrintingPolicy(const clang::PrintingPolicy &Policy) { 454 PrintingPolicy = Policy; 455 } 456 457 SourceManager& getSourceManager() { return SourceMgr; } 458 const SourceManager& getSourceManager() const { return SourceMgr; } 459 460 llvm::BumpPtrAllocator &getAllocator() const { 461 return BumpAlloc; 462 } 463 464 void *Allocate(size_t Size, unsigned Align = 8) const { 465 return BumpAlloc.Allocate(Size, Align); 466 } 467 void Deallocate(void *Ptr) const { } 468 469 /// Return the total amount of physical memory allocated for representing 470 /// AST nodes and type information. 471 size_t getASTAllocatedMemory() const { 472 return BumpAlloc.getTotalMemory(); 473 } 474 /// Return the total memory used for various side tables. 475 size_t getSideTableAllocatedMemory() const; 476 477 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 478 return DiagAllocator; 479 } 480 481 const TargetInfo &getTargetInfo() const { return *Target; } 482 483 bool AtomicUsesUnsupportedLibcall(const AtomicExpr *E) const; 484 485 const LangOptions& getLangOpts() const { return LangOpts; } 486 487 DiagnosticsEngine &getDiagnostics() const; 488 489 FullSourceLoc getFullLoc(SourceLocation Loc) const { 490 return FullSourceLoc(Loc,SourceMgr); 491 } 492 493 /// \brief All comments in this translation unit. 494 RawCommentList Comments; 495 496 /// \brief True if comments are already loaded from ExternalASTSource. 497 mutable bool CommentsLoaded; 498 499 class RawCommentAndCacheFlags { 500 public: 501 enum Kind { 502 /// We searched for a comment attached to the particular declaration, but 503 /// didn't find any. 504 /// 505 /// getRaw() == 0. 506 NoCommentInDecl = 0, 507 508 /// We have found a comment attached to this particular declaration. 509 /// 510 /// getRaw() != 0. 511 FromDecl, 512 513 /// This declaration does not have an attached comment, and we have 514 /// searched the redeclaration chain. 515 /// 516 /// If getRaw() == 0, the whole redeclaration chain does not have any 517 /// comments. 518 /// 519 /// If getRaw() != 0, it is a comment propagated from other 520 /// redeclaration. 521 FromRedecl 522 }; 523 524 Kind getKind() const LLVM_READONLY { 525 return Data.getInt(); 526 } 527 528 void setKind(Kind K) { 529 Data.setInt(K); 530 } 531 532 const RawComment *getRaw() const LLVM_READONLY { 533 return Data.getPointer(); 534 } 535 536 void setRaw(const RawComment *RC) { 537 Data.setPointer(RC); 538 } 539 540 const Decl *getOriginalDecl() const LLVM_READONLY { 541 return OriginalDecl; 542 } 543 544 void setOriginalDecl(const Decl *Orig) { 545 OriginalDecl = Orig; 546 } 547 548 private: 549 llvm::PointerIntPair<const RawComment *, 2, Kind> Data; 550 const Decl *OriginalDecl; 551 }; 552 553 /// \brief Mapping from declarations to comments attached to any 554 /// redeclaration. 555 /// 556 /// Raw comments are owned by Comments list. This mapping is populated 557 /// lazily. 558 mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments; 559 560 /// \brief Mapping from declarations to parsed comments attached to any 561 /// redeclaration. 562 mutable llvm::DenseMap<const Decl *, comments::FullComment *> ParsedComments; 563 564 /// \brief Return the documentation comment attached to a given declaration, 565 /// without looking into cache. 566 RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 567 568public: 569 RawCommentList &getRawCommentList() { 570 return Comments; 571 } 572 573 void addComment(const RawComment &RC) { 574 assert(LangOpts.RetainCommentsFromSystemHeaders || 575 !SourceMgr.isInSystemHeader(RC.getSourceRange().getBegin())); 576 Comments.addComment(RC, BumpAlloc); 577 } 578 579 /// \brief Return the documentation comment attached to a given declaration. 580 /// Returns NULL if no comment is attached. 581 /// 582 /// \param OriginalDecl if not NULL, is set to declaration AST node that had 583 /// the comment, if the comment we found comes from a redeclaration. 584 const RawComment *getRawCommentForAnyRedecl( 585 const Decl *D, 586 const Decl **OriginalDecl = NULL) const; 587 588 /// Return parsed documentation comment attached to a given declaration. 589 /// Returns NULL if no comment is attached. 590 /// 591 /// \param PP the Preprocessor used with this TU. Could be NULL if 592 /// preprocessor is not available. 593 comments::FullComment *getCommentForDecl(const Decl *D, 594 const Preprocessor *PP) const; 595 596 /// Return parsed documentation comment attached to a given declaration. 597 /// Returns NULL if no comment is attached. Does not look at any 598 /// redeclarations of the declaration. 599 comments::FullComment *getLocalCommentForDeclUncached(const Decl *D) const; 600 601 comments::FullComment *cloneFullComment(comments::FullComment *FC, 602 const Decl *D) const; 603 604private: 605 mutable comments::CommandTraits CommentCommandTraits; 606 607public: 608 comments::CommandTraits &getCommentCommandTraits() const { 609 return CommentCommandTraits; 610 } 611 612 /// \brief Retrieve the attributes for the given declaration. 613 AttrVec& getDeclAttrs(const Decl *D); 614 615 /// \brief Erase the attributes corresponding to the given declaration. 616 void eraseDeclAttrs(const Decl *D); 617 618 /// \brief If this variable is an instantiated static data member of a 619 /// class template specialization, returns the templated static data member 620 /// from which it was instantiated. 621 // FIXME: Remove ? 622 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 623 const VarDecl *Var); 624 625 TemplateOrSpecializationInfo 626 getTemplateOrSpecializationInfo(const VarDecl *Var); 627 628 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 629 630 void setClassScopeSpecializationPattern(FunctionDecl *FD, 631 FunctionDecl *Pattern); 632 633 /// \brief Note that the static data member \p Inst is an instantiation of 634 /// the static data member template \p Tmpl of a class template. 635 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 636 TemplateSpecializationKind TSK, 637 SourceLocation PointOfInstantiation = SourceLocation()); 638 639 void setTemplateOrSpecializationInfo(VarDecl *Inst, 640 TemplateOrSpecializationInfo TSI); 641 642 /// \brief If the given using decl \p Inst is an instantiation of a 643 /// (possibly unresolved) using decl from a template instantiation, 644 /// return it. 645 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 646 647 /// \brief Remember that the using decl \p Inst is an instantiation 648 /// of the using decl \p Pattern of a class template. 649 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 650 651 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 652 UsingShadowDecl *Pattern); 653 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 654 655 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 656 657 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 658 659 // Access to the set of methods overridden by the given C++ method. 660 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 661 overridden_cxx_method_iterator 662 overridden_methods_begin(const CXXMethodDecl *Method) const; 663 664 overridden_cxx_method_iterator 665 overridden_methods_end(const CXXMethodDecl *Method) const; 666 667 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 668 669 /// \brief Note that the given C++ \p Method overrides the given \p 670 /// Overridden method. 671 void addOverriddenMethod(const CXXMethodDecl *Method, 672 const CXXMethodDecl *Overridden); 673 674 /// \brief Return C++ or ObjC overridden methods for the given \p Method. 675 /// 676 /// An ObjC method is considered to override any method in the class's 677 /// base classes, its protocols, or its categories' protocols, that has 678 /// the same selector and is of the same kind (class or instance). 679 /// A method in an implementation is not considered as overriding the same 680 /// method in the interface or its categories. 681 void getOverriddenMethods( 682 const NamedDecl *Method, 683 SmallVectorImpl<const NamedDecl *> &Overridden) const; 684 685 /// \brief Notify the AST context that a new import declaration has been 686 /// parsed or implicitly created within this translation unit. 687 void addedLocalImportDecl(ImportDecl *Import); 688 689 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 690 return Import->NextLocalImport; 691 } 692 693 /// \brief Iterator that visits import declarations. 694 class import_iterator { 695 ImportDecl *Import; 696 697 public: 698 typedef ImportDecl *value_type; 699 typedef ImportDecl *reference; 700 typedef ImportDecl *pointer; 701 typedef int difference_type; 702 typedef std::forward_iterator_tag iterator_category; 703 704 import_iterator() : Import() { } 705 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 706 707 reference operator*() const { return Import; } 708 pointer operator->() const { return Import; } 709 710 import_iterator &operator++() { 711 Import = ASTContext::getNextLocalImport(Import); 712 return *this; 713 } 714 715 import_iterator operator++(int) { 716 import_iterator Other(*this); 717 ++(*this); 718 return Other; 719 } 720 721 friend bool operator==(import_iterator X, import_iterator Y) { 722 return X.Import == Y.Import; 723 } 724 725 friend bool operator!=(import_iterator X, import_iterator Y) { 726 return X.Import != Y.Import; 727 } 728 }; 729 730 import_iterator local_import_begin() const { 731 return import_iterator(FirstLocalImport); 732 } 733 import_iterator local_import_end() const { return import_iterator(); } 734 735 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 736 737 738 // Builtin Types. 739 CanQualType VoidTy; 740 CanQualType BoolTy; 741 CanQualType CharTy; 742 CanQualType WCharTy; // [C++ 3.9.1p5]. 743 CanQualType WideCharTy; // Same as WCharTy in C++, integer type in C99. 744 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 745 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 746 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 747 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 748 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 749 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 750 CanQualType FloatTy, DoubleTy, LongDoubleTy; 751 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 752 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 753 CanQualType VoidPtrTy, NullPtrTy; 754 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 755 CanQualType BuiltinFnTy; 756 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 757 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 758 CanQualType ObjCBuiltinBoolTy; 759 CanQualType OCLImage1dTy, OCLImage1dArrayTy, OCLImage1dBufferTy; 760 CanQualType OCLImage2dTy, OCLImage2dArrayTy; 761 CanQualType OCLImage3dTy; 762 CanQualType OCLSamplerTy, OCLEventTy; 763 764 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 765 mutable QualType AutoDeductTy; // Deduction against 'auto'. 766 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 767 768 // Type used to help define __builtin_va_list for some targets. 769 // The type is built when constructing 'BuiltinVaListDecl'. 770 mutable QualType VaListTagTy; 771 772 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 773 IdentifierTable &idents, SelectorTable &sels, 774 Builtin::Context &builtins, 775 unsigned size_reserve, 776 bool DelayInitialization = false); 777 778 ~ASTContext(); 779 780 /// \brief Attach an external AST source to the AST context. 781 /// 782 /// The external AST source provides the ability to load parts of 783 /// the abstract syntax tree as needed from some external storage, 784 /// e.g., a precompiled header. 785 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 786 787 /// \brief Retrieve a pointer to the external AST source associated 788 /// with this AST context, if any. 789 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 790 791 /// \brief Attach an AST mutation listener to the AST context. 792 /// 793 /// The AST mutation listener provides the ability to track modifications to 794 /// the abstract syntax tree entities committed after they were initially 795 /// created. 796 void setASTMutationListener(ASTMutationListener *Listener) { 797 this->Listener = Listener; 798 } 799 800 /// \brief Retrieve a pointer to the AST mutation listener associated 801 /// with this AST context, if any. 802 ASTMutationListener *getASTMutationListener() const { return Listener; } 803 804 void PrintStats() const; 805 const SmallVectorImpl<Type *>& getTypes() const { return Types; } 806 807 /// \brief Retrieve the declaration for the 128-bit signed integer type. 808 TypedefDecl *getInt128Decl() const; 809 810 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 811 TypedefDecl *getUInt128Decl() const; 812 813 /// \brief Retrieve the declaration for a 128-bit float stub type. 814 TypeDecl *getFloat128StubType() const; 815 816 //===--------------------------------------------------------------------===// 817 // Type Constructors 818 //===--------------------------------------------------------------------===// 819 820private: 821 /// \brief Return a type with extended qualifiers. 822 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 823 824 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 825 826public: 827 /// \brief Return the uniqued reference to the type for an address space 828 /// qualified type with the specified type and address space. 829 /// 830 /// The resulting type has a union of the qualifiers from T and the address 831 /// space. If T already has an address space specifier, it is silently 832 /// replaced. 833 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 834 835 /// \brief Return the uniqued reference to the type for an Objective-C 836 /// gc-qualified type. 837 /// 838 /// The retulting type has a union of the qualifiers from T and the gc 839 /// attribute. 840 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 841 842 /// \brief Return the uniqued reference to the type for a \c restrict 843 /// qualified type. 844 /// 845 /// The resulting type has a union of the qualifiers from \p T and 846 /// \c restrict. 847 QualType getRestrictType(QualType T) const { 848 return T.withFastQualifiers(Qualifiers::Restrict); 849 } 850 851 /// \brief Return the uniqued reference to the type for a \c volatile 852 /// qualified type. 853 /// 854 /// The resulting type has a union of the qualifiers from \p T and 855 /// \c volatile. 856 QualType getVolatileType(QualType T) const { 857 return T.withFastQualifiers(Qualifiers::Volatile); 858 } 859 860 /// \brief Return the uniqued reference to the type for a \c const 861 /// qualified type. 862 /// 863 /// The resulting type has a union of the qualifiers from \p T and \c const. 864 /// 865 /// It can be reasonably expected that this will always be equivalent to 866 /// calling T.withConst(). 867 QualType getConstType(QualType T) const { return T.withConst(); } 868 869 /// \brief Change the ExtInfo on a function type. 870 const FunctionType *adjustFunctionType(const FunctionType *Fn, 871 FunctionType::ExtInfo EInfo); 872 873 /// \brief Change the result type of a function type once it is deduced. 874 void adjustDeducedFunctionResultType(FunctionDecl *FD, QualType ResultType); 875 876 /// \brief Return the uniqued reference to the type for a complex 877 /// number with the specified element type. 878 QualType getComplexType(QualType T) const; 879 CanQualType getComplexType(CanQualType T) const { 880 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 881 } 882 883 /// \brief Return the uniqued reference to the type for a pointer to 884 /// the specified type. 885 QualType getPointerType(QualType T) const; 886 CanQualType getPointerType(CanQualType T) const { 887 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 888 } 889 890 /// \brief Return the uniqued reference to the decayed version of the given 891 /// type. Can only be called on array and function types which decay to 892 /// pointer types. 893 QualType getDecayedType(QualType T) const; 894 CanQualType getDecayedType(CanQualType T) const { 895 return CanQualType::CreateUnsafe(getDecayedType((QualType) T)); 896 } 897 898 /// \brief Return the uniqued reference to the atomic type for the specified 899 /// type. 900 QualType getAtomicType(QualType T) const; 901 902 /// \brief Return the uniqued reference to the type for a block of the 903 /// specified type. 904 QualType getBlockPointerType(QualType T) const; 905 906 /// Gets the struct used to keep track of the descriptor for pointer to 907 /// blocks. 908 QualType getBlockDescriptorType() const; 909 910 /// Gets the struct used to keep track of the extended descriptor for 911 /// pointer to blocks. 912 QualType getBlockDescriptorExtendedType() const; 913 914 void setcudaConfigureCallDecl(FunctionDecl *FD) { 915 cudaConfigureCallDecl = FD; 916 } 917 FunctionDecl *getcudaConfigureCallDecl() { 918 return cudaConfigureCallDecl; 919 } 920 921 /// Returns true iff we need copy/dispose helpers for the given type. 922 bool BlockRequiresCopying(QualType Ty, const VarDecl *D); 923 924 925 /// Returns true, if given type has a known lifetime. HasByrefExtendedLayout is set 926 /// to false in this case. If HasByrefExtendedLayout returns true, byref variable 927 /// has extended lifetime. 928 bool getByrefLifetime(QualType Ty, 929 Qualifiers::ObjCLifetime &Lifetime, 930 bool &HasByrefExtendedLayout) const; 931 932 /// \brief Return the uniqued reference to the type for an lvalue reference 933 /// to the specified type. 934 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 935 const; 936 937 /// \brief Return the uniqued reference to the type for an rvalue reference 938 /// to the specified type. 939 QualType getRValueReferenceType(QualType T) const; 940 941 /// \brief Return the uniqued reference to the type for a member pointer to 942 /// the specified type in the specified class. 943 /// 944 /// The class \p Cls is a \c Type because it could be a dependent name. 945 QualType getMemberPointerType(QualType T, const Type *Cls) const; 946 947 /// \brief Return a non-unique reference to the type for a variable array of 948 /// the specified element type. 949 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 950 ArrayType::ArraySizeModifier ASM, 951 unsigned IndexTypeQuals, 952 SourceRange Brackets) const; 953 954 /// \brief Return a non-unique reference to the type for a dependently-sized 955 /// array of the specified element type. 956 /// 957 /// FIXME: We will need these to be uniqued, or at least comparable, at some 958 /// point. 959 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 960 ArrayType::ArraySizeModifier ASM, 961 unsigned IndexTypeQuals, 962 SourceRange Brackets) const; 963 964 /// \brief Return a unique reference to the type for an incomplete array of 965 /// the specified element type. 966 QualType getIncompleteArrayType(QualType EltTy, 967 ArrayType::ArraySizeModifier ASM, 968 unsigned IndexTypeQuals) const; 969 970 /// \brief Return the unique reference to the type for a constant array of 971 /// the specified element type. 972 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 973 ArrayType::ArraySizeModifier ASM, 974 unsigned IndexTypeQuals) const; 975 976 /// \brief Returns a vla type where known sizes are replaced with [*]. 977 QualType getVariableArrayDecayedType(QualType Ty) const; 978 979 /// \brief Return the unique reference to a vector type of the specified 980 /// element type and size. 981 /// 982 /// \pre \p VectorType must be a built-in type. 983 QualType getVectorType(QualType VectorType, unsigned NumElts, 984 VectorType::VectorKind VecKind) const; 985 986 /// \brief Return the unique reference to an extended vector type 987 /// of the specified element type and size. 988 /// 989 /// \pre \p VectorType must be a built-in type. 990 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 991 992 /// \pre Return a non-unique reference to the type for a dependently-sized 993 /// vector of the specified element type. 994 /// 995 /// FIXME: We will need these to be uniqued, or at least comparable, at some 996 /// point. 997 QualType getDependentSizedExtVectorType(QualType VectorType, 998 Expr *SizeExpr, 999 SourceLocation AttrLoc) const; 1000 1001 /// \brief Return a K&R style C function type like 'int()'. 1002 QualType getFunctionNoProtoType(QualType ResultTy, 1003 const FunctionType::ExtInfo &Info) const; 1004 1005 QualType getFunctionNoProtoType(QualType ResultTy) const { 1006 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 1007 } 1008 1009 /// \brief Return a normal function type with a typed argument list. 1010 QualType getFunctionType(QualType ResultTy, ArrayRef<QualType> Args, 1011 const FunctionProtoType::ExtProtoInfo &EPI) const; 1012 1013 /// \brief Return the unique reference to the type for the specified type 1014 /// declaration. 1015 QualType getTypeDeclType(const TypeDecl *Decl, 1016 const TypeDecl *PrevDecl = 0) const { 1017 assert(Decl && "Passed null for Decl param"); 1018 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1019 1020 if (PrevDecl) { 1021 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 1022 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1023 return QualType(PrevDecl->TypeForDecl, 0); 1024 } 1025 1026 return getTypeDeclTypeSlow(Decl); 1027 } 1028 1029 /// \brief Return the unique reference to the type for the specified 1030 /// typedef-name decl. 1031 QualType getTypedefType(const TypedefNameDecl *Decl, 1032 QualType Canon = QualType()) const; 1033 1034 QualType getRecordType(const RecordDecl *Decl) const; 1035 1036 QualType getEnumType(const EnumDecl *Decl) const; 1037 1038 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 1039 1040 QualType getAttributedType(AttributedType::Kind attrKind, 1041 QualType modifiedType, 1042 QualType equivalentType); 1043 1044 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 1045 QualType Replacement) const; 1046 QualType getSubstTemplateTypeParmPackType( 1047 const TemplateTypeParmType *Replaced, 1048 const TemplateArgument &ArgPack); 1049 1050 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 1051 bool ParameterPack, 1052 TemplateTypeParmDecl *ParmDecl = 0) const; 1053 1054 QualType getTemplateSpecializationType(TemplateName T, 1055 const TemplateArgument *Args, 1056 unsigned NumArgs, 1057 QualType Canon = QualType()) const; 1058 1059 QualType getCanonicalTemplateSpecializationType(TemplateName T, 1060 const TemplateArgument *Args, 1061 unsigned NumArgs) const; 1062 1063 QualType getTemplateSpecializationType(TemplateName T, 1064 const TemplateArgumentListInfo &Args, 1065 QualType Canon = QualType()) const; 1066 1067 TypeSourceInfo * 1068 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 1069 const TemplateArgumentListInfo &Args, 1070 QualType Canon = QualType()) const; 1071 1072 QualType getParenType(QualType NamedType) const; 1073 1074 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1075 NestedNameSpecifier *NNS, 1076 QualType NamedType) const; 1077 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 1078 NestedNameSpecifier *NNS, 1079 const IdentifierInfo *Name, 1080 QualType Canon = QualType()) const; 1081 1082 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1083 NestedNameSpecifier *NNS, 1084 const IdentifierInfo *Name, 1085 const TemplateArgumentListInfo &Args) const; 1086 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1087 NestedNameSpecifier *NNS, 1088 const IdentifierInfo *Name, 1089 unsigned NumArgs, 1090 const TemplateArgument *Args) const; 1091 1092 QualType getPackExpansionType(QualType Pattern, 1093 Optional<unsigned> NumExpansions); 1094 1095 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1096 ObjCInterfaceDecl *PrevDecl = 0) const; 1097 1098 QualType getObjCObjectType(QualType Base, 1099 ObjCProtocolDecl * const *Protocols, 1100 unsigned NumProtocols) const; 1101 1102 /// \brief Return a ObjCObjectPointerType type for the given ObjCObjectType. 1103 QualType getObjCObjectPointerType(QualType OIT) const; 1104 1105 /// \brief GCC extension. 1106 QualType getTypeOfExprType(Expr *e) const; 1107 QualType getTypeOfType(QualType t) const; 1108 1109 /// \brief C++11 decltype. 1110 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 1111 1112 /// \brief Unary type transforms 1113 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 1114 UnaryTransformType::UTTKind UKind) const; 1115 1116 /// \brief C++11 deduced auto type. 1117 QualType getAutoType(QualType DeducedType, bool IsDecltypeAuto, 1118 bool IsDependent = false) const; 1119 1120 /// \brief C++11 deduction pattern for 'auto' type. 1121 QualType getAutoDeductType() const; 1122 1123 /// \brief C++11 deduction pattern for 'auto &&' type. 1124 QualType getAutoRRefDeductType() const; 1125 1126 /// \brief Return the unique reference to the type for the specified TagDecl 1127 /// (struct/union/class/enum) decl. 1128 QualType getTagDeclType(const TagDecl *Decl) const; 1129 1130 /// \brief Return the unique type for "size_t" (C99 7.17), defined in 1131 /// <stddef.h>. 1132 /// 1133 /// The sizeof operator requires this (C99 6.5.3.4p4). 1134 CanQualType getSizeType() const; 1135 1136 /// \brief Return the unique type for "intmax_t" (C99 7.18.1.5), defined in 1137 /// <stdint.h>. 1138 CanQualType getIntMaxType() const; 1139 1140 /// \brief Return the unique type for "uintmax_t" (C99 7.18.1.5), defined in 1141 /// <stdint.h>. 1142 CanQualType getUIntMaxType() const; 1143 1144 /// \brief Return the unique wchar_t type available in C++ (and available as 1145 /// __wchar_t as a Microsoft extension). 1146 QualType getWCharType() const { return WCharTy; } 1147 1148 /// \brief Return the type of wide characters. In C++, this returns the 1149 /// unique wchar_t type. In C99, this returns a type compatible with the type 1150 /// defined in <stddef.h> as defined by the target. 1151 QualType getWideCharType() const { return WideCharTy; } 1152 1153 /// \brief Return the type of "signed wchar_t". 1154 /// 1155 /// Used when in C++, as a GCC extension. 1156 QualType getSignedWCharType() const; 1157 1158 /// \brief Return the type of "unsigned wchar_t". 1159 /// 1160 /// Used when in C++, as a GCC extension. 1161 QualType getUnsignedWCharType() const; 1162 1163 /// \brief In C99, this returns a type compatible with the type 1164 /// defined in <stddef.h> as defined by the target. 1165 QualType getWIntType() const { return WIntTy; } 1166 1167 /// \brief Return a type compatible with "intptr_t" (C99 7.18.1.4), 1168 /// as defined by the target. 1169 QualType getIntPtrType() const; 1170 1171 /// \brief Return a type compatible with "uintptr_t" (C99 7.18.1.4), 1172 /// as defined by the target. 1173 QualType getUIntPtrType() const; 1174 1175 /// \brief Return the unique type for "ptrdiff_t" (C99 7.17) defined in 1176 /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1177 QualType getPointerDiffType() const; 1178 1179 /// \brief Return the unique type for "pid_t" defined in 1180 /// <sys/types.h>. We need this to compute the correct type for vfork(). 1181 QualType getProcessIDType() const; 1182 1183 /// \brief Return the C structure type used to represent constant CFStrings. 1184 QualType getCFConstantStringType() const; 1185 1186 /// \brief Returns the C struct type for objc_super 1187 QualType getObjCSuperType() const; 1188 void setObjCSuperType(QualType ST) { ObjCSuperType = ST; } 1189 1190 /// Get the structure type used to representation CFStrings, or NULL 1191 /// if it hasn't yet been built. 1192 QualType getRawCFConstantStringType() const { 1193 if (CFConstantStringTypeDecl) 1194 return getTagDeclType(CFConstantStringTypeDecl); 1195 return QualType(); 1196 } 1197 void setCFConstantStringType(QualType T); 1198 1199 // This setter/getter represents the ObjC type for an NSConstantString. 1200 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 1201 QualType getObjCConstantStringInterface() const { 1202 return ObjCConstantStringType; 1203 } 1204 1205 QualType getObjCNSStringType() const { 1206 return ObjCNSStringType; 1207 } 1208 1209 void setObjCNSStringType(QualType T) { 1210 ObjCNSStringType = T; 1211 } 1212 1213 /// \brief Retrieve the type that \c id has been defined to, which may be 1214 /// different from the built-in \c id if \c id has been typedef'd. 1215 QualType getObjCIdRedefinitionType() const { 1216 if (ObjCIdRedefinitionType.isNull()) 1217 return getObjCIdType(); 1218 return ObjCIdRedefinitionType; 1219 } 1220 1221 /// \brief Set the user-written type that redefines \c id. 1222 void setObjCIdRedefinitionType(QualType RedefType) { 1223 ObjCIdRedefinitionType = RedefType; 1224 } 1225 1226 /// \brief Retrieve the type that \c Class has been defined to, which may be 1227 /// different from the built-in \c Class if \c Class has been typedef'd. 1228 QualType getObjCClassRedefinitionType() const { 1229 if (ObjCClassRedefinitionType.isNull()) 1230 return getObjCClassType(); 1231 return ObjCClassRedefinitionType; 1232 } 1233 1234 /// \brief Set the user-written type that redefines 'SEL'. 1235 void setObjCClassRedefinitionType(QualType RedefType) { 1236 ObjCClassRedefinitionType = RedefType; 1237 } 1238 1239 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1240 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1241 QualType getObjCSelRedefinitionType() const { 1242 if (ObjCSelRedefinitionType.isNull()) 1243 return getObjCSelType(); 1244 return ObjCSelRedefinitionType; 1245 } 1246 1247 1248 /// \brief Set the user-written type that redefines 'SEL'. 1249 void setObjCSelRedefinitionType(QualType RedefType) { 1250 ObjCSelRedefinitionType = RedefType; 1251 } 1252 1253 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1254 /// otherwise, returns a NULL type; 1255 QualType getObjCInstanceType() { 1256 return getTypeDeclType(getObjCInstanceTypeDecl()); 1257 } 1258 1259 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1260 /// "instancetype" type. 1261 TypedefDecl *getObjCInstanceTypeDecl(); 1262 1263 /// \brief Set the type for the C FILE type. 1264 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1265 1266 /// \brief Retrieve the C FILE type. 1267 QualType getFILEType() const { 1268 if (FILEDecl) 1269 return getTypeDeclType(FILEDecl); 1270 return QualType(); 1271 } 1272 1273 /// \brief Set the type for the C jmp_buf type. 1274 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1275 this->jmp_bufDecl = jmp_bufDecl; 1276 } 1277 1278 /// \brief Retrieve the C jmp_buf type. 1279 QualType getjmp_bufType() const { 1280 if (jmp_bufDecl) 1281 return getTypeDeclType(jmp_bufDecl); 1282 return QualType(); 1283 } 1284 1285 /// \brief Set the type for the C sigjmp_buf type. 1286 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1287 this->sigjmp_bufDecl = sigjmp_bufDecl; 1288 } 1289 1290 /// \brief Retrieve the C sigjmp_buf type. 1291 QualType getsigjmp_bufType() const { 1292 if (sigjmp_bufDecl) 1293 return getTypeDeclType(sigjmp_bufDecl); 1294 return QualType(); 1295 } 1296 1297 /// \brief Set the type for the C ucontext_t type. 1298 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1299 this->ucontext_tDecl = ucontext_tDecl; 1300 } 1301 1302 /// \brief Retrieve the C ucontext_t type. 1303 QualType getucontext_tType() const { 1304 if (ucontext_tDecl) 1305 return getTypeDeclType(ucontext_tDecl); 1306 return QualType(); 1307 } 1308 1309 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1310 QualType getLogicalOperationType() const { 1311 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1312 } 1313 1314 /// \brief Emit the Objective-CC type encoding for the given type \p T into 1315 /// \p S. 1316 /// 1317 /// If \p Field is specified then record field names are also encoded. 1318 void getObjCEncodingForType(QualType T, std::string &S, 1319 const FieldDecl *Field=0) const; 1320 1321 void getLegacyIntegralTypeEncoding(QualType &t) const; 1322 1323 /// \brief Put the string version of the type qualifiers \p QT into \p S. 1324 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1325 std::string &S) const; 1326 1327 /// \brief Emit the encoded type for the function \p Decl into \p S. 1328 /// 1329 /// This is in the same format as Objective-C method encodings. 1330 /// 1331 /// \returns true if an error occurred (e.g., because one of the parameter 1332 /// types is incomplete), false otherwise. 1333 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1334 1335 /// \brief Emit the encoded type for the method declaration \p Decl into 1336 /// \p S. 1337 /// 1338 /// \returns true if an error occurred (e.g., because one of the parameter 1339 /// types is incomplete), false otherwise. 1340 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1341 bool Extended = false) 1342 const; 1343 1344 /// \brief Return the encoded type for this block declaration. 1345 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1346 1347 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1348 /// this method declaration. If non-NULL, Container must be either 1349 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1350 /// only be NULL when getting encodings for protocol properties. 1351 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1352 const Decl *Container, 1353 std::string &S) const; 1354 1355 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1356 ObjCProtocolDecl *rProto) const; 1357 1358 /// \brief Return the size of type \p T for Objective-C encoding purpose, 1359 /// in characters. 1360 CharUnits getObjCEncodingTypeSize(QualType T) const; 1361 1362 /// \brief Retrieve the typedef corresponding to the predefined \c id type 1363 /// in Objective-C. 1364 TypedefDecl *getObjCIdDecl() const; 1365 1366 /// \brief Represents the Objective-CC \c id type. 1367 /// 1368 /// This is set up lazily, by Sema. \c id is always a (typedef for a) 1369 /// pointer type, a pointer to a struct. 1370 QualType getObjCIdType() const { 1371 return getTypeDeclType(getObjCIdDecl()); 1372 } 1373 1374 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1375 /// in Objective-C. 1376 TypedefDecl *getObjCSelDecl() const; 1377 1378 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1379 /// 'SEL' type. 1380 QualType getObjCSelType() const { 1381 return getTypeDeclType(getObjCSelDecl()); 1382 } 1383 1384 /// \brief Retrieve the typedef declaration corresponding to the predefined 1385 /// Objective-C 'Class' type. 1386 TypedefDecl *getObjCClassDecl() const; 1387 1388 /// \brief Represents the Objective-C \c Class type. 1389 /// 1390 /// This is set up lazily, by Sema. \c Class is always a (typedef for a) 1391 /// pointer type, a pointer to a struct. 1392 QualType getObjCClassType() const { 1393 return getTypeDeclType(getObjCClassDecl()); 1394 } 1395 1396 /// \brief Retrieve the Objective-C class declaration corresponding to 1397 /// the predefined \c Protocol class. 1398 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1399 1400 /// \brief Retrieve declaration of 'BOOL' typedef 1401 TypedefDecl *getBOOLDecl() const { 1402 return BOOLDecl; 1403 } 1404 1405 /// \brief Save declaration of 'BOOL' typedef 1406 void setBOOLDecl(TypedefDecl *TD) { 1407 BOOLDecl = TD; 1408 } 1409 1410 /// \brief type of 'BOOL' type. 1411 QualType getBOOLType() const { 1412 return getTypeDeclType(getBOOLDecl()); 1413 } 1414 1415 /// \brief Retrieve the type of the Objective-C \c Protocol class. 1416 QualType getObjCProtoType() const { 1417 return getObjCInterfaceType(getObjCProtocolDecl()); 1418 } 1419 1420 /// \brief Retrieve the C type declaration corresponding to the predefined 1421 /// \c __builtin_va_list type. 1422 TypedefDecl *getBuiltinVaListDecl() const; 1423 1424 /// \brief Retrieve the type of the \c __builtin_va_list type. 1425 QualType getBuiltinVaListType() const { 1426 return getTypeDeclType(getBuiltinVaListDecl()); 1427 } 1428 1429 /// \brief Retrieve the C type declaration corresponding to the predefined 1430 /// \c __va_list_tag type used to help define the \c __builtin_va_list type 1431 /// for some targets. 1432 QualType getVaListTagType() const; 1433 1434 /// \brief Return a type with additional \c const, \c volatile, or 1435 /// \c restrict qualifiers. 1436 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1437 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1438 } 1439 1440 /// \brief Un-split a SplitQualType. 1441 QualType getQualifiedType(SplitQualType split) const { 1442 return getQualifiedType(split.Ty, split.Quals); 1443 } 1444 1445 /// \brief Return a type with additional qualifiers. 1446 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1447 if (!Qs.hasNonFastQualifiers()) 1448 return T.withFastQualifiers(Qs.getFastQualifiers()); 1449 QualifierCollector Qc(Qs); 1450 const Type *Ptr = Qc.strip(T); 1451 return getExtQualType(Ptr, Qc); 1452 } 1453 1454 /// \brief Return a type with additional qualifiers. 1455 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1456 if (!Qs.hasNonFastQualifiers()) 1457 return QualType(T, Qs.getFastQualifiers()); 1458 return getExtQualType(T, Qs); 1459 } 1460 1461 /// \brief Return a type with the given lifetime qualifier. 1462 /// 1463 /// \pre Neither type.ObjCLifetime() nor \p lifetime may be \c OCL_None. 1464 QualType getLifetimeQualifiedType(QualType type, 1465 Qualifiers::ObjCLifetime lifetime) { 1466 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1467 assert(lifetime != Qualifiers::OCL_None); 1468 1469 Qualifiers qs; 1470 qs.addObjCLifetime(lifetime); 1471 return getQualifiedType(type, qs); 1472 } 1473 1474 /// getUnqualifiedObjCPointerType - Returns version of 1475 /// Objective-C pointer type with lifetime qualifier removed. 1476 QualType getUnqualifiedObjCPointerType(QualType type) const { 1477 if (!type.getTypePtr()->isObjCObjectPointerType() || 1478 !type.getQualifiers().hasObjCLifetime()) 1479 return type; 1480 Qualifiers Qs = type.getQualifiers(); 1481 Qs.removeObjCLifetime(); 1482 return getQualifiedType(type.getUnqualifiedType(), Qs); 1483 } 1484 1485 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1486 SourceLocation NameLoc) const; 1487 1488 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1489 UnresolvedSetIterator End) const; 1490 1491 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1492 bool TemplateKeyword, 1493 TemplateDecl *Template) const; 1494 1495 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1496 const IdentifierInfo *Name) const; 1497 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1498 OverloadedOperatorKind Operator) const; 1499 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1500 TemplateName replacement) const; 1501 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1502 const TemplateArgument &ArgPack) const; 1503 1504 enum GetBuiltinTypeError { 1505 GE_None, ///< No error 1506 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1507 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1508 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1509 }; 1510 1511 /// \brief Return the type for the specified builtin. 1512 /// 1513 /// If \p IntegerConstantArgs is non-null, it is filled in with a bitmask of 1514 /// arguments to the builtin that are required to be integer constant 1515 /// expressions. 1516 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1517 unsigned *IntegerConstantArgs = 0) const; 1518 1519private: 1520 CanQualType getFromTargetType(unsigned Type) const; 1521 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1522 1523 //===--------------------------------------------------------------------===// 1524 // Type Predicates. 1525 //===--------------------------------------------------------------------===// 1526 1527public: 1528 /// \brief Return one of the GCNone, Weak or Strong Objective-C garbage 1529 /// collection attributes. 1530 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1531 1532 /// \brief Return true if the given vector types are of the same unqualified 1533 /// type or if they are equivalent to the same GCC vector type. 1534 /// 1535 /// \note This ignores whether they are target-specific (AltiVec or Neon) 1536 /// types. 1537 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1538 1539 /// \brief Return true if this is an \c NSObject object with its \c NSObject 1540 /// attribute set. 1541 static bool isObjCNSObjectType(QualType Ty) { 1542 return Ty->isObjCNSObjectType(); 1543 } 1544 1545 //===--------------------------------------------------------------------===// 1546 // Type Sizing and Analysis 1547 //===--------------------------------------------------------------------===// 1548 1549 /// \brief Return the APFloat 'semantics' for the specified scalar floating 1550 /// point type. 1551 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1552 1553 /// \brief Get the size and alignment of the specified complete type in bits. 1554 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1555 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1556 return getTypeInfo(T.getTypePtr()); 1557 } 1558 1559 /// \brief Return the size of the specified (complete) type \p T, in bits. 1560 uint64_t getTypeSize(QualType T) const { 1561 return getTypeInfo(T).first; 1562 } 1563 uint64_t getTypeSize(const Type *T) const { 1564 return getTypeInfo(T).first; 1565 } 1566 1567 /// \brief Return the size of the character type, in bits. 1568 uint64_t getCharWidth() const { 1569 return getTypeSize(CharTy); 1570 } 1571 1572 /// \brief Convert a size in bits to a size in characters. 1573 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1574 1575 /// \brief Convert a size in characters to a size in bits. 1576 int64_t toBits(CharUnits CharSize) const; 1577 1578 /// \brief Return the size of the specified (complete) type \p T, in 1579 /// characters. 1580 CharUnits getTypeSizeInChars(QualType T) const; 1581 CharUnits getTypeSizeInChars(const Type *T) const; 1582 1583 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1584 /// bits. 1585 unsigned getTypeAlign(QualType T) const { 1586 return getTypeInfo(T).second; 1587 } 1588 unsigned getTypeAlign(const Type *T) const { 1589 return getTypeInfo(T).second; 1590 } 1591 1592 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1593 /// characters. 1594 CharUnits getTypeAlignInChars(QualType T) const; 1595 CharUnits getTypeAlignInChars(const Type *T) const; 1596 1597 // getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the 1598 // type is a record, its data size is returned. 1599 std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const; 1600 1601 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1602 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1603 1604 /// \brief Return the "preferred" alignment of the specified type \p T for 1605 /// the current target, in bits. 1606 /// 1607 /// This can be different than the ABI alignment in cases where it is 1608 /// beneficial for performance to overalign a data type. 1609 unsigned getPreferredTypeAlign(const Type *T) const; 1610 1611 /// \brief Return the alignment in bits that should be given to a 1612 /// global variable with type \p T. 1613 unsigned getAlignOfGlobalVar(QualType T) const; 1614 1615 /// \brief Return the alignment in characters that should be given to a 1616 /// global variable with type \p T. 1617 CharUnits getAlignOfGlobalVarInChars(QualType T) const; 1618 1619 /// \brief Return a conservative estimate of the alignment of the specified 1620 /// decl \p D. 1621 /// 1622 /// \pre \p D must not be a bitfield type, as bitfields do not have a valid 1623 /// alignment. 1624 /// 1625 /// If \p ForAlignof, references are treated like their underlying type 1626 /// and large arrays don't get any special treatment. If not \p ForAlignof 1627 /// it computes the value expected by CodeGen: references are treated like 1628 /// pointers and large arrays get extra alignment. 1629 CharUnits getDeclAlign(const Decl *D, bool ForAlignof = false) const; 1630 1631 /// \brief Get or compute information about the layout of the specified 1632 /// record (struct/union/class) \p D, which indicates its size and field 1633 /// position information. 1634 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1635 1636 /// \brief Get or compute information about the layout of the specified 1637 /// Objective-C interface. 1638 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1639 const; 1640 1641 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1642 bool Simple = false) const; 1643 1644 /// \brief Get or compute information about the layout of the specified 1645 /// Objective-C implementation. 1646 /// 1647 /// This may differ from the interface if synthesized ivars are present. 1648 const ASTRecordLayout & 1649 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1650 1651 /// \brief Get our current best idea for the key function of the 1652 /// given record decl, or NULL if there isn't one. 1653 /// 1654 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 1655 /// ...the first non-pure virtual function that is not inline at the 1656 /// point of class definition. 1657 /// 1658 /// Other ABIs use the same idea. However, the ARM C++ ABI ignores 1659 /// virtual functions that are defined 'inline', which means that 1660 /// the result of this computation can change. 1661 const CXXMethodDecl *getCurrentKeyFunction(const CXXRecordDecl *RD); 1662 1663 /// \brief Observe that the given method cannot be a key function. 1664 /// Checks the key-function cache for the method's class and clears it 1665 /// if matches the given declaration. 1666 /// 1667 /// This is used in ABIs where out-of-line definitions marked 1668 /// inline are not considered to be key functions. 1669 /// 1670 /// \param method should be the declaration from the class definition 1671 void setNonKeyFunction(const CXXMethodDecl *method); 1672 1673 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1674 uint64_t getFieldOffset(const ValueDecl *FD) const; 1675 1676 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1677 1678 MangleContext *createMangleContext(); 1679 1680 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1681 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1682 1683 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1684 void CollectInheritedProtocols(const Decl *CDecl, 1685 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1686 1687 //===--------------------------------------------------------------------===// 1688 // Type Operators 1689 //===--------------------------------------------------------------------===// 1690 1691 /// \brief Return the canonical (structural) type corresponding to the 1692 /// specified potentially non-canonical type \p T. 1693 /// 1694 /// The non-canonical version of a type may have many "decorated" versions of 1695 /// types. Decorators can include typedefs, 'typeof' operators, etc. The 1696 /// returned type is guaranteed to be free of any of these, allowing two 1697 /// canonical types to be compared for exact equality with a simple pointer 1698 /// comparison. 1699 CanQualType getCanonicalType(QualType T) const { 1700 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1701 } 1702 1703 const Type *getCanonicalType(const Type *T) const { 1704 return T->getCanonicalTypeInternal().getTypePtr(); 1705 } 1706 1707 /// \brief Return the canonical parameter type corresponding to the specific 1708 /// potentially non-canonical one. 1709 /// 1710 /// Qualifiers are stripped off, functions are turned into function 1711 /// pointers, and arrays decay one level into pointers. 1712 CanQualType getCanonicalParamType(QualType T) const; 1713 1714 /// \brief Determine whether the given types \p T1 and \p T2 are equivalent. 1715 bool hasSameType(QualType T1, QualType T2) const { 1716 return getCanonicalType(T1) == getCanonicalType(T2); 1717 } 1718 1719 /// \brief Return this type as a completely-unqualified array type, 1720 /// capturing the qualifiers in \p Quals. 1721 /// 1722 /// This will remove the minimal amount of sugaring from the types, similar 1723 /// to the behavior of QualType::getUnqualifiedType(). 1724 /// 1725 /// \param T is the qualified type, which may be an ArrayType 1726 /// 1727 /// \param Quals will receive the full set of qualifiers that were 1728 /// applied to the array. 1729 /// 1730 /// \returns if this is an array type, the completely unqualified array type 1731 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1732 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1733 1734 /// \brief Determine whether the given types are equivalent after 1735 /// cvr-qualifiers have been removed. 1736 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1737 return getCanonicalType(T1).getTypePtr() == 1738 getCanonicalType(T2).getTypePtr(); 1739 } 1740 1741 bool ObjCMethodsAreEqual(const ObjCMethodDecl *MethodDecl, 1742 const ObjCMethodDecl *MethodImp); 1743 1744 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1745 1746 /// \brief Retrieves the "canonical" nested name specifier for a 1747 /// given nested name specifier. 1748 /// 1749 /// The canonical nested name specifier is a nested name specifier 1750 /// that uniquely identifies a type or namespace within the type 1751 /// system. For example, given: 1752 /// 1753 /// \code 1754 /// namespace N { 1755 /// struct S { 1756 /// template<typename T> struct X { typename T* type; }; 1757 /// }; 1758 /// } 1759 /// 1760 /// template<typename T> struct Y { 1761 /// typename N::S::X<T>::type member; 1762 /// }; 1763 /// \endcode 1764 /// 1765 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1766 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1767 /// by declarations in the type system and the canonical type for 1768 /// the template type parameter 'T' is template-param-0-0. 1769 NestedNameSpecifier * 1770 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1771 1772 /// \brief Retrieves the default calling convention to use for 1773 /// C++ instance methods. 1774 CallingConv getDefaultCXXMethodCallConv(bool isVariadic); 1775 1776 /// \brief Retrieves the canonical representation of the given 1777 /// calling convention. 1778 CallingConv getCanonicalCallConv(CallingConv CC) const; 1779 1780 /// \brief Determines whether two calling conventions name the same 1781 /// calling convention. 1782 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1783 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1784 } 1785 1786 /// \brief Retrieves the "canonical" template name that refers to a 1787 /// given template. 1788 /// 1789 /// The canonical template name is the simplest expression that can 1790 /// be used to refer to a given template. For most templates, this 1791 /// expression is just the template declaration itself. For example, 1792 /// the template std::vector can be referred to via a variety of 1793 /// names---std::vector, \::std::vector, vector (if vector is in 1794 /// scope), etc.---but all of these names map down to the same 1795 /// TemplateDecl, which is used to form the canonical template name. 1796 /// 1797 /// Dependent template names are more interesting. Here, the 1798 /// template name could be something like T::template apply or 1799 /// std::allocator<T>::template rebind, where the nested name 1800 /// specifier itself is dependent. In this case, the canonical 1801 /// template name uses the shortest form of the dependent 1802 /// nested-name-specifier, which itself contains all canonical 1803 /// types, values, and templates. 1804 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1805 1806 /// \brief Determine whether the given template names refer to the same 1807 /// template. 1808 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1809 1810 /// \brief Retrieve the "canonical" template argument. 1811 /// 1812 /// The canonical template argument is the simplest template argument 1813 /// (which may be a type, value, expression, or declaration) that 1814 /// expresses the value of the argument. 1815 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1816 const; 1817 1818 /// Type Query functions. If the type is an instance of the specified class, 1819 /// return the Type pointer for the underlying maximally pretty type. This 1820 /// is a member of ASTContext because this may need to do some amount of 1821 /// canonicalization, e.g. to move type qualifiers into the element type. 1822 const ArrayType *getAsArrayType(QualType T) const; 1823 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1824 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1825 } 1826 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1827 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1828 } 1829 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1830 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1831 } 1832 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1833 const { 1834 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1835 } 1836 1837 /// \brief Return the innermost element type of an array type. 1838 /// 1839 /// For example, will return "int" for int[m][n] 1840 QualType getBaseElementType(const ArrayType *VAT) const; 1841 1842 /// \brief Return the innermost element type of a type (which needn't 1843 /// actually be an array type). 1844 QualType getBaseElementType(QualType QT) const; 1845 1846 /// \brief Return number of constant array elements. 1847 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1848 1849 /// \brief Perform adjustment on the parameter type of a function. 1850 /// 1851 /// This routine adjusts the given parameter type @p T to the actual 1852 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1853 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1854 QualType getAdjustedParameterType(QualType T) const; 1855 1856 /// \brief Retrieve the parameter type as adjusted for use in the signature 1857 /// of a function, decaying array and function types and removing top-level 1858 /// cv-qualifiers. 1859 QualType getSignatureParameterType(QualType T) const; 1860 1861 /// \brief Return the properly qualified result of decaying the specified 1862 /// array type to a pointer. 1863 /// 1864 /// This operation is non-trivial when handling typedefs etc. The canonical 1865 /// type of \p T must be an array type, this returns a pointer to a properly 1866 /// qualified element of the array. 1867 /// 1868 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1869 QualType getArrayDecayedType(QualType T) const; 1870 1871 /// \brief Return the type that \p PromotableType will promote to: C99 1872 /// 6.3.1.1p2, assuming that \p PromotableType is a promotable integer type. 1873 QualType getPromotedIntegerType(QualType PromotableType) const; 1874 1875 /// \brief Recurses in pointer/array types until it finds an Objective-C 1876 /// retainable type and returns its ownership. 1877 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1878 1879 /// \brief Whether this is a promotable bitfield reference according 1880 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1881 /// 1882 /// \returns the type this bit-field will promote to, or NULL if no 1883 /// promotion occurs. 1884 QualType isPromotableBitField(Expr *E) const; 1885 1886 /// \brief Return the highest ranked integer type, see C99 6.3.1.8p1. 1887 /// 1888 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1889 /// \p LHS < \p RHS, return -1. 1890 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1891 1892 /// \brief Compare the rank of the two specified floating point types, 1893 /// ignoring the domain of the type (i.e. 'double' == '_Complex double'). 1894 /// 1895 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1896 /// \p LHS < \p RHS, return -1. 1897 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1898 1899 /// \brief Return a real floating point or a complex type (based on 1900 /// \p typeDomain/\p typeSize). 1901 /// 1902 /// \param typeDomain a real floating point or complex type. 1903 /// \param typeSize a real floating point or complex type. 1904 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1905 QualType typeDomain) const; 1906 1907 unsigned getTargetAddressSpace(QualType T) const { 1908 return getTargetAddressSpace(T.getQualifiers()); 1909 } 1910 1911 unsigned getTargetAddressSpace(Qualifiers Q) const { 1912 return getTargetAddressSpace(Q.getAddressSpace()); 1913 } 1914 1915 unsigned getTargetAddressSpace(unsigned AS) const { 1916 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1917 return AS; 1918 else 1919 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1920 } 1921 1922private: 1923 // Helper for integer ordering 1924 unsigned getIntegerRank(const Type *T) const; 1925 1926public: 1927 1928 //===--------------------------------------------------------------------===// 1929 // Type Compatibility Predicates 1930 //===--------------------------------------------------------------------===// 1931 1932 /// Compatibility predicates used to check assignment expressions. 1933 bool typesAreCompatible(QualType T1, QualType T2, 1934 bool CompareUnqualified = false); // C99 6.2.7p1 1935 1936 bool propertyTypesAreCompatible(QualType, QualType); 1937 bool typesAreBlockPointerCompatible(QualType, QualType); 1938 1939 bool isObjCIdType(QualType T) const { 1940 return T == getObjCIdType(); 1941 } 1942 bool isObjCClassType(QualType T) const { 1943 return T == getObjCClassType(); 1944 } 1945 bool isObjCSelType(QualType T) const { 1946 return T == getObjCSelType(); 1947 } 1948 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1949 bool ForCompare); 1950 1951 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1952 1953 // Check the safety of assignment from LHS to RHS 1954 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1955 const ObjCObjectPointerType *RHSOPT); 1956 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1957 const ObjCObjectType *RHS); 1958 bool canAssignObjCInterfacesInBlockPointer( 1959 const ObjCObjectPointerType *LHSOPT, 1960 const ObjCObjectPointerType *RHSOPT, 1961 bool BlockReturnType); 1962 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1963 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1964 const ObjCObjectPointerType *RHSOPT); 1965 bool canBindObjCObjectType(QualType To, QualType From); 1966 1967 // Functions for calculating composite types 1968 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1969 bool Unqualified = false, bool BlockReturnType = false); 1970 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1971 bool Unqualified = false); 1972 QualType mergeFunctionArgumentTypes(QualType, QualType, 1973 bool OfBlockPointer=false, 1974 bool Unqualified = false); 1975 QualType mergeTransparentUnionType(QualType, QualType, 1976 bool OfBlockPointer=false, 1977 bool Unqualified = false); 1978 1979 QualType mergeObjCGCQualifiers(QualType, QualType); 1980 1981 bool FunctionTypesMatchOnNSConsumedAttrs( 1982 const FunctionProtoType *FromFunctionType, 1983 const FunctionProtoType *ToFunctionType); 1984 1985 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1986 ObjCLayouts[CD] = 0; 1987 } 1988 1989 //===--------------------------------------------------------------------===// 1990 // Integer Predicates 1991 //===--------------------------------------------------------------------===// 1992 1993 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1994 // of bits in an integer type excluding any padding bits. 1995 unsigned getIntWidth(QualType T) const; 1996 1997 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1998 // unsigned integer type. This method takes a signed type, and returns the 1999 // corresponding unsigned integer type. 2000 QualType getCorrespondingUnsignedType(QualType T) const; 2001 2002 //===--------------------------------------------------------------------===// 2003 // Type Iterators. 2004 //===--------------------------------------------------------------------===// 2005 2006 typedef SmallVectorImpl<Type *>::iterator type_iterator; 2007 typedef SmallVectorImpl<Type *>::const_iterator const_type_iterator; 2008 2009 type_iterator types_begin() { return Types.begin(); } 2010 type_iterator types_end() { return Types.end(); } 2011 const_type_iterator types_begin() const { return Types.begin(); } 2012 const_type_iterator types_end() const { return Types.end(); } 2013 2014 //===--------------------------------------------------------------------===// 2015 // Integer Values 2016 //===--------------------------------------------------------------------===// 2017 2018 /// \brief Make an APSInt of the appropriate width and signedness for the 2019 /// given \p Value and integer \p Type. 2020 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 2021 llvm::APSInt Res(getIntWidth(Type), 2022 !Type->isSignedIntegerOrEnumerationType()); 2023 Res = Value; 2024 return Res; 2025 } 2026 2027 bool isSentinelNullExpr(const Expr *E); 2028 2029 /// \brief Get the implementation of the ObjCInterfaceDecl \p D, or NULL if 2030 /// none exists. 2031 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 2032 /// \brief Get the implementation of the ObjCCategoryDecl \p D, or NULL if 2033 /// none exists. 2034 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 2035 2036 /// \brief Return true if there is at least one \@implementation in the TU. 2037 bool AnyObjCImplementation() { 2038 return !ObjCImpls.empty(); 2039 } 2040 2041 /// \brief Set the implementation of ObjCInterfaceDecl. 2042 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 2043 ObjCImplementationDecl *ImplD); 2044 /// \brief Set the implementation of ObjCCategoryDecl. 2045 void setObjCImplementation(ObjCCategoryDecl *CatD, 2046 ObjCCategoryImplDecl *ImplD); 2047 2048 /// \brief Get the duplicate declaration of a ObjCMethod in the same 2049 /// interface, or null if none exists. 2050 const ObjCMethodDecl *getObjCMethodRedeclaration( 2051 const ObjCMethodDecl *MD) const { 2052 return ObjCMethodRedecls.lookup(MD); 2053 } 2054 2055 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 2056 const ObjCMethodDecl *Redecl) { 2057 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 2058 ObjCMethodRedecls[MD] = Redecl; 2059 } 2060 2061 /// \brief Returns the Objective-C interface that \p ND belongs to if it is 2062 /// an Objective-C method/property/ivar etc. that is part of an interface, 2063 /// otherwise returns null. 2064 const ObjCInterfaceDecl *getObjContainingInterface(const NamedDecl *ND) const; 2065 2066 /// \brief Set the copy inialization expression of a block var decl. 2067 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 2068 /// \brief Get the copy initialization expression of the VarDecl \p VD, or 2069 /// NULL if none exists. 2070 Expr *getBlockVarCopyInits(const VarDecl* VD); 2071 2072 /// \brief Allocate an uninitialized TypeSourceInfo. 2073 /// 2074 /// The caller should initialize the memory held by TypeSourceInfo using 2075 /// the TypeLoc wrappers. 2076 /// 2077 /// \param T the type that will be the basis for type source info. This type 2078 /// should refer to how the declarator was written in source code, not to 2079 /// what type semantic analysis resolved the declarator to. 2080 /// 2081 /// \param Size the size of the type info to create, or 0 if the size 2082 /// should be calculated based on the type. 2083 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 2084 2085 /// \brief Allocate a TypeSourceInfo where all locations have been 2086 /// initialized to a given location, which defaults to the empty 2087 /// location. 2088 TypeSourceInfo * 2089 getTrivialTypeSourceInfo(QualType T, 2090 SourceLocation Loc = SourceLocation()) const; 2091 2092 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 2093 2094 /// \brief Add a deallocation callback that will be invoked when the 2095 /// ASTContext is destroyed. 2096 /// 2097 /// \param Callback A callback function that will be invoked on destruction. 2098 /// 2099 /// \param Data Pointer data that will be provided to the callback function 2100 /// when it is called. 2101 void AddDeallocation(void (*Callback)(void*), void *Data); 2102 2103 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 2104 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 2105 2106 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 2107 /// lazily, only when used; this is only relevant for function or file scoped 2108 /// var definitions. 2109 /// 2110 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 2111 /// it is not used. 2112 bool DeclMustBeEmitted(const Decl *D); 2113 2114 void setManglingNumber(const NamedDecl *ND, unsigned Number); 2115 unsigned getManglingNumber(const NamedDecl *ND) const; 2116 2117 /// \brief Retrieve the context for computing mangling numbers in the given 2118 /// DeclContext. 2119 MangleNumberingContext &getManglingNumberContext(const DeclContext *DC); 2120 2121 /// \brief Used by ParmVarDecl to store on the side the 2122 /// index of the parameter when it exceeds the size of the normal bitfield. 2123 void setParameterIndex(const ParmVarDecl *D, unsigned index); 2124 2125 /// \brief Used by ParmVarDecl to retrieve on the side the 2126 /// index of the parameter when it exceeds the size of the normal bitfield. 2127 unsigned getParameterIndex(const ParmVarDecl *D) const; 2128 2129 /// \brief Get the storage for the constant value of a materialized temporary 2130 /// of static storage duration. 2131 APValue *getMaterializedTemporaryValue(const MaterializeTemporaryExpr *E, 2132 bool MayCreate); 2133 2134 //===--------------------------------------------------------------------===// 2135 // Statistics 2136 //===--------------------------------------------------------------------===// 2137 2138 /// \brief The number of implicitly-declared default constructors. 2139 static unsigned NumImplicitDefaultConstructors; 2140 2141 /// \brief The number of implicitly-declared default constructors for 2142 /// which declarations were built. 2143 static unsigned NumImplicitDefaultConstructorsDeclared; 2144 2145 /// \brief The number of implicitly-declared copy constructors. 2146 static unsigned NumImplicitCopyConstructors; 2147 2148 /// \brief The number of implicitly-declared copy constructors for 2149 /// which declarations were built. 2150 static unsigned NumImplicitCopyConstructorsDeclared; 2151 2152 /// \brief The number of implicitly-declared move constructors. 2153 static unsigned NumImplicitMoveConstructors; 2154 2155 /// \brief The number of implicitly-declared move constructors for 2156 /// which declarations were built. 2157 static unsigned NumImplicitMoveConstructorsDeclared; 2158 2159 /// \brief The number of implicitly-declared copy assignment operators. 2160 static unsigned NumImplicitCopyAssignmentOperators; 2161 2162 /// \brief The number of implicitly-declared copy assignment operators for 2163 /// which declarations were built. 2164 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 2165 2166 /// \brief The number of implicitly-declared move assignment operators. 2167 static unsigned NumImplicitMoveAssignmentOperators; 2168 2169 /// \brief The number of implicitly-declared move assignment operators for 2170 /// which declarations were built. 2171 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 2172 2173 /// \brief The number of implicitly-declared destructors. 2174 static unsigned NumImplicitDestructors; 2175 2176 /// \brief The number of implicitly-declared destructors for which 2177 /// declarations were built. 2178 static unsigned NumImplicitDestructorsDeclared; 2179 2180private: 2181 ASTContext(const ASTContext &) LLVM_DELETED_FUNCTION; 2182 void operator=(const ASTContext &) LLVM_DELETED_FUNCTION; 2183 2184public: 2185 /// \brief Initialize built-in types. 2186 /// 2187 /// This routine may only be invoked once for a given ASTContext object. 2188 /// It is normally invoked by the ASTContext constructor. However, the 2189 /// constructor can be asked to delay initialization, which places the burden 2190 /// of calling this function on the user of that object. 2191 /// 2192 /// \param Target The target 2193 void InitBuiltinTypes(const TargetInfo &Target); 2194 2195private: 2196 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 2197 2198 // Return the Objective-C type encoding for a given type. 2199 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 2200 bool ExpandPointedToStructures, 2201 bool ExpandStructures, 2202 const FieldDecl *Field, 2203 bool OutermostType = false, 2204 bool EncodingProperty = false, 2205 bool StructField = false, 2206 bool EncodeBlockParameters = false, 2207 bool EncodeClassNames = false, 2208 bool EncodePointerToObjCTypedef = false) const; 2209 2210 // Adds the encoding of the structure's members. 2211 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 2212 const FieldDecl *Field, 2213 bool includeVBases = true) const; 2214 2215 // Adds the encoding of a method parameter or return type. 2216 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 2217 QualType T, std::string& S, 2218 bool Extended) const; 2219 2220 const ASTRecordLayout & 2221 getObjCLayout(const ObjCInterfaceDecl *D, 2222 const ObjCImplementationDecl *Impl) const; 2223 2224private: 2225 /// \brief A set of deallocations that should be performed when the 2226 /// ASTContext is destroyed. 2227 typedef llvm::SmallDenseMap<void(*)(void*), llvm::SmallVector<void*, 16> > 2228 DeallocationMap; 2229 DeallocationMap Deallocations; 2230 2231 // FIXME: This currently contains the set of StoredDeclMaps used 2232 // by DeclContext objects. This probably should not be in ASTContext, 2233 // but we include it here so that ASTContext can quickly deallocate them. 2234 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 2235 2236 friend class DeclContext; 2237 friend class DeclarationNameTable; 2238 void ReleaseDeclContextMaps(); 2239 2240 llvm::OwningPtr<ParentMap> AllParents; 2241}; 2242 2243/// \brief Utility function for constructing a nullary selector. 2244static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 2245 IdentifierInfo* II = &Ctx.Idents.get(name); 2246 return Ctx.Selectors.getSelector(0, &II); 2247} 2248 2249/// \brief Utility function for constructing an unary selector. 2250static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 2251 IdentifierInfo* II = &Ctx.Idents.get(name); 2252 return Ctx.Selectors.getSelector(1, &II); 2253} 2254 2255} // end namespace clang 2256 2257// operator new and delete aren't allowed inside namespaces. 2258 2259/// @brief Placement new for using the ASTContext's allocator. 2260/// 2261/// This placement form of operator new uses the ASTContext's allocator for 2262/// obtaining memory. 2263/// 2264/// IMPORTANT: These are also declared in clang/AST/AttrIterator.h! Any changes 2265/// here need to also be made there. 2266/// 2267/// We intentionally avoid using a nothrow specification here so that the calls 2268/// to this operator will not perform a null check on the result -- the 2269/// underlying allocator never returns null pointers. 2270/// 2271/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2272/// @code 2273/// // Default alignment (8) 2274/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 2275/// // Specific alignment 2276/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 2277/// @endcode 2278/// Please note that you cannot use delete on the pointer; it must be 2279/// deallocated using an explicit destructor call followed by 2280/// @c Context.Deallocate(Ptr). 2281/// 2282/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2283/// @param C The ASTContext that provides the allocator. 2284/// @param Alignment The alignment of the allocated memory (if the underlying 2285/// allocator supports it). 2286/// @return The allocated memory. Could be NULL. 2287inline void *operator new(size_t Bytes, const clang::ASTContext &C, 2288 size_t Alignment) { 2289 return C.Allocate(Bytes, Alignment); 2290} 2291/// @brief Placement delete companion to the new above. 2292/// 2293/// This operator is just a companion to the new above. There is no way of 2294/// invoking it directly; see the new operator for more details. This operator 2295/// is called implicitly by the compiler if a placement new expression using 2296/// the ASTContext throws in the object constructor. 2297inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 2298 C.Deallocate(Ptr); 2299} 2300 2301/// This placement form of operator new[] uses the ASTContext's allocator for 2302/// obtaining memory. 2303/// 2304/// We intentionally avoid using a nothrow specification here so that the calls 2305/// to this operator will not perform a null check on the result -- the 2306/// underlying allocator never returns null pointers. 2307/// 2308/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2309/// @code 2310/// // Default alignment (8) 2311/// char *data = new (Context) char[10]; 2312/// // Specific alignment 2313/// char *data = new (Context, 4) char[10]; 2314/// @endcode 2315/// Please note that you cannot use delete on the pointer; it must be 2316/// deallocated using an explicit destructor call followed by 2317/// @c Context.Deallocate(Ptr). 2318/// 2319/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2320/// @param C The ASTContext that provides the allocator. 2321/// @param Alignment The alignment of the allocated memory (if the underlying 2322/// allocator supports it). 2323/// @return The allocated memory. Could be NULL. 2324inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2325 size_t Alignment = 8) { 2326 return C.Allocate(Bytes, Alignment); 2327} 2328 2329/// @brief Placement delete[] companion to the new[] above. 2330/// 2331/// This operator is just a companion to the new[] above. There is no way of 2332/// invoking it directly; see the new[] operator for more details. This operator 2333/// is called implicitly by the compiler if a placement new[] expression using 2334/// the ASTContext throws in the object constructor. 2335inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2336 C.Deallocate(Ptr); 2337} 2338 2339#endif 2340