ASTContext.h revision f7992132207d7ddc8810a135cec97ebe5805e500
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/CanonicalType.h" 19#include "clang/AST/CommentCommandTraits.h" 20#include "clang/AST/Decl.h" 21#include "clang/AST/LambdaMangleContext.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/PrettyPrinter.h" 24#include "clang/AST/RawCommentList.h" 25#include "clang/AST/TemplateName.h" 26#include "clang/AST/Type.h" 27#include "clang/Basic/AddressSpaces.h" 28#include "clang/Basic/IdentifierTable.h" 29#include "clang/Basic/LangOptions.h" 30#include "clang/Basic/OperatorKinds.h" 31#include "clang/Basic/PartialDiagnostic.h" 32#include "clang/Basic/VersionTuple.h" 33#include "llvm/ADT/DenseMap.h" 34#include "llvm/ADT/FoldingSet.h" 35#include "llvm/ADT/IntrusiveRefCntPtr.h" 36#include "llvm/ADT/OwningPtr.h" 37#include "llvm/ADT/SmallPtrSet.h" 38#include "llvm/ADT/TinyPtrVector.h" 39#include "llvm/Support/Allocator.h" 40#include <vector> 41 42namespace llvm { 43 struct fltSemantics; 44} 45 46namespace clang { 47 class FileManager; 48 class ASTRecordLayout; 49 class BlockExpr; 50 class CharUnits; 51 class DiagnosticsEngine; 52 class Expr; 53 class ExternalASTSource; 54 class ASTMutationListener; 55 class IdentifierTable; 56 class SelectorTable; 57 class TargetInfo; 58 class CXXABI; 59 // Decls 60 class DeclContext; 61 class CXXConversionDecl; 62 class CXXMethodDecl; 63 class CXXRecordDecl; 64 class Decl; 65 class FieldDecl; 66 class MangleContext; 67 class ObjCIvarDecl; 68 class ObjCIvarRefExpr; 69 class ObjCPropertyDecl; 70 class ParmVarDecl; 71 class RecordDecl; 72 class StoredDeclsMap; 73 class TagDecl; 74 class TemplateTemplateParmDecl; 75 class TemplateTypeParmDecl; 76 class TranslationUnitDecl; 77 class TypeDecl; 78 class TypedefNameDecl; 79 class UsingDecl; 80 class UsingShadowDecl; 81 class UnresolvedSetIterator; 82 83 namespace Builtin { class Context; } 84 85 namespace comments { 86 class FullComment; 87 } 88 89/// \brief Holds long-lived AST nodes (such as types and decls) that can be 90/// referred to throughout the semantic analysis of a file. 91class ASTContext : public RefCountedBase<ASTContext> { 92 ASTContext &this_() { return *this; } 93 94 mutable std::vector<Type*> Types; 95 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 96 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 97 mutable llvm::FoldingSet<PointerType> PointerTypes; 98 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 99 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 100 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 101 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 102 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 103 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 104 mutable std::vector<VariableArrayType*> VariableArrayTypes; 105 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 106 mutable llvm::FoldingSet<DependentSizedExtVectorType> 107 DependentSizedExtVectorTypes; 108 mutable llvm::FoldingSet<VectorType> VectorTypes; 109 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 110 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 111 FunctionProtoTypes; 112 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 113 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 114 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 115 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 116 SubstTemplateTypeParmTypes; 117 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 118 SubstTemplateTypeParmPackTypes; 119 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 120 TemplateSpecializationTypes; 121 mutable llvm::FoldingSet<ParenType> ParenTypes; 122 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 123 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 124 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 125 ASTContext&> 126 DependentTemplateSpecializationTypes; 127 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 128 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 129 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 130 mutable llvm::FoldingSet<AutoType> AutoTypes; 131 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 132 llvm::FoldingSet<AttributedType> AttributedTypes; 133 134 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 135 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 136 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 137 SubstTemplateTemplateParms; 138 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 139 ASTContext&> 140 SubstTemplateTemplateParmPacks; 141 142 /// \brief The set of nested name specifiers. 143 /// 144 /// This set is managed by the NestedNameSpecifier class. 145 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 146 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 147 friend class NestedNameSpecifier; 148 149 /// \brief A cache mapping from RecordDecls to ASTRecordLayouts. 150 /// 151 /// This is lazily created. This is intentionally not serialized. 152 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 153 ASTRecordLayouts; 154 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 155 ObjCLayouts; 156 157 /// \brief A cache from types to size and alignment information. 158 typedef llvm::DenseMap<const Type*, 159 std::pair<uint64_t, unsigned> > TypeInfoMap; 160 mutable TypeInfoMap MemoizedTypeInfo; 161 162 /// \brief A cache mapping from CXXRecordDecls to key functions. 163 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 164 165 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 166 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 167 168 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 169 /// interface. 170 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 171 172 /// \brief Mapping from __block VarDecls to their copy initialization expr. 173 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 174 175 /// \brief Mapping from class scope functions specialization to their 176 /// template patterns. 177 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 178 ClassScopeSpecializationPattern; 179 180 /// \brief Representation of a "canonical" template template parameter that 181 /// is used in canonical template names. 182 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 183 TemplateTemplateParmDecl *Parm; 184 185 public: 186 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 187 : Parm(Parm) { } 188 189 TemplateTemplateParmDecl *getParam() const { return Parm; } 190 191 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 192 193 static void Profile(llvm::FoldingSetNodeID &ID, 194 TemplateTemplateParmDecl *Parm); 195 }; 196 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 197 CanonTemplateTemplateParms; 198 199 TemplateTemplateParmDecl * 200 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 201 202 /// \brief The typedef for the __int128_t type. 203 mutable TypedefDecl *Int128Decl; 204 205 /// \brief The typedef for the __uint128_t type. 206 mutable TypedefDecl *UInt128Decl; 207 208 /// \brief The typedef for the target specific predefined 209 /// __builtin_va_list type. 210 mutable TypedefDecl *BuiltinVaListDecl; 211 212 /// \brief The typedef for the predefined \c id type. 213 mutable TypedefDecl *ObjCIdDecl; 214 215 /// \brief The typedef for the predefined \c SEL type. 216 mutable TypedefDecl *ObjCSelDecl; 217 218 /// \brief The typedef for the predefined \c Class type. 219 mutable TypedefDecl *ObjCClassDecl; 220 221 /// \brief The typedef for the predefined \c Protocol class in Objective-C. 222 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 223 224 /// \brief The typedef for the predefined 'BOOL' type. 225 mutable TypedefDecl *BOOLDecl; 226 227 // Typedefs which may be provided defining the structure of Objective-C 228 // pseudo-builtins 229 QualType ObjCIdRedefinitionType; 230 QualType ObjCClassRedefinitionType; 231 QualType ObjCSelRedefinitionType; 232 233 QualType ObjCConstantStringType; 234 mutable RecordDecl *CFConstantStringTypeDecl; 235 236 mutable QualType ObjCSuperType; 237 238 QualType ObjCNSStringType; 239 240 /// \brief The typedef declaration for the Objective-C "instancetype" type. 241 TypedefDecl *ObjCInstanceTypeDecl; 242 243 /// \brief The type for the C FILE type. 244 TypeDecl *FILEDecl; 245 246 /// \brief The type for the C jmp_buf type. 247 TypeDecl *jmp_bufDecl; 248 249 /// \brief The type for the C sigjmp_buf type. 250 TypeDecl *sigjmp_bufDecl; 251 252 /// \brief The type for the C ucontext_t type. 253 TypeDecl *ucontext_tDecl; 254 255 /// \brief Type for the Block descriptor for Blocks CodeGen. 256 /// 257 /// Since this is only used for generation of debug info, it is not 258 /// serialized. 259 mutable RecordDecl *BlockDescriptorType; 260 261 /// \brief Type for the Block descriptor for Blocks CodeGen. 262 /// 263 /// Since this is only used for generation of debug info, it is not 264 /// serialized. 265 mutable RecordDecl *BlockDescriptorExtendedType; 266 267 /// \brief Declaration for the CUDA cudaConfigureCall function. 268 FunctionDecl *cudaConfigureCallDecl; 269 270 TypeSourceInfo NullTypeSourceInfo; 271 272 /// \brief Keeps track of all declaration attributes. 273 /// 274 /// Since so few decls have attrs, we keep them in a hash map instead of 275 /// wasting space in the Decl class. 276 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 277 278 /// \brief Keeps track of the static data member templates from which 279 /// static data members of class template specializations were instantiated. 280 /// 281 /// This data structure stores the mapping from instantiations of static 282 /// data members to the static data member representations within the 283 /// class template from which they were instantiated along with the kind 284 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 285 /// 286 /// Given the following example: 287 /// 288 /// \code 289 /// template<typename T> 290 /// struct X { 291 /// static T value; 292 /// }; 293 /// 294 /// template<typename T> 295 /// T X<T>::value = T(17); 296 /// 297 /// int *x = &X<int>::value; 298 /// \endcode 299 /// 300 /// This mapping will contain an entry that maps from the VarDecl for 301 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 302 /// class template X) and will be marked TSK_ImplicitInstantiation. 303 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 304 InstantiatedFromStaticDataMember; 305 306 /// \brief Keeps track of the declaration from which a UsingDecl was 307 /// created during instantiation. 308 /// 309 /// The source declaration is always a UsingDecl, an UnresolvedUsingValueDecl, 310 /// or an UnresolvedUsingTypenameDecl. 311 /// 312 /// For example: 313 /// \code 314 /// template<typename T> 315 /// struct A { 316 /// void f(); 317 /// }; 318 /// 319 /// template<typename T> 320 /// struct B : A<T> { 321 /// using A<T>::f; 322 /// }; 323 /// 324 /// template struct B<int>; 325 /// \endcode 326 /// 327 /// This mapping will contain an entry that maps from the UsingDecl in 328 /// B<int> to the UnresolvedUsingDecl in B<T>. 329 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 330 331 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 332 InstantiatedFromUsingShadowDecl; 333 334 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 335 336 /// \brief Mapping that stores the methods overridden by a given C++ 337 /// member function. 338 /// 339 /// Since most C++ member functions aren't virtual and therefore 340 /// don't override anything, we store the overridden functions in 341 /// this map on the side rather than within the CXXMethodDecl structure. 342 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 343 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 344 345 /// \brief Mapping from each declaration context to its corresponding lambda 346 /// mangling context. 347 llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts; 348 349 llvm::DenseMap<const DeclContext *, unsigned> UnnamedMangleContexts; 350 llvm::DenseMap<const TagDecl *, unsigned> UnnamedMangleNumbers; 351 352 /// \brief Mapping that stores parameterIndex values for ParmVarDecls when 353 /// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex. 354 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 355 ParameterIndexTable ParamIndices; 356 357 ImportDecl *FirstLocalImport; 358 ImportDecl *LastLocalImport; 359 360 TranslationUnitDecl *TUDecl; 361 362 /// \brief The associated SourceManager object.a 363 SourceManager &SourceMgr; 364 365 /// \brief The language options used to create the AST associated with 366 /// this ASTContext object. 367 LangOptions &LangOpts; 368 369 /// \brief The allocator used to create AST objects. 370 /// 371 /// AST objects are never destructed; rather, all memory associated with the 372 /// AST objects will be released when the ASTContext itself is destroyed. 373 mutable llvm::BumpPtrAllocator BumpAlloc; 374 375 /// \brief Allocator for partial diagnostics. 376 PartialDiagnostic::StorageAllocator DiagAllocator; 377 378 /// \brief The current C++ ABI. 379 OwningPtr<CXXABI> ABI; 380 CXXABI *createCXXABI(const TargetInfo &T); 381 382 /// \brief The logical -> physical address space map. 383 const LangAS::Map *AddrSpaceMap; 384 385 friend class ASTDeclReader; 386 friend class ASTReader; 387 friend class ASTWriter; 388 friend class CXXRecordDecl; 389 390 const TargetInfo *Target; 391 clang::PrintingPolicy PrintingPolicy; 392 393public: 394 IdentifierTable &Idents; 395 SelectorTable &Selectors; 396 Builtin::Context &BuiltinInfo; 397 mutable DeclarationNameTable DeclarationNames; 398 OwningPtr<ExternalASTSource> ExternalSource; 399 ASTMutationListener *Listener; 400 401 const clang::PrintingPolicy &getPrintingPolicy() const { 402 return PrintingPolicy; 403 } 404 405 void setPrintingPolicy(const clang::PrintingPolicy &Policy) { 406 PrintingPolicy = Policy; 407 } 408 409 SourceManager& getSourceManager() { return SourceMgr; } 410 const SourceManager& getSourceManager() const { return SourceMgr; } 411 412 llvm::BumpPtrAllocator &getAllocator() const { 413 return BumpAlloc; 414 } 415 416 void *Allocate(unsigned Size, unsigned Align = 8) const { 417 return BumpAlloc.Allocate(Size, Align); 418 } 419 void Deallocate(void *Ptr) const { } 420 421 /// Return the total amount of physical memory allocated for representing 422 /// AST nodes and type information. 423 size_t getASTAllocatedMemory() const { 424 return BumpAlloc.getTotalMemory(); 425 } 426 /// Return the total memory used for various side tables. 427 size_t getSideTableAllocatedMemory() const; 428 429 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 430 return DiagAllocator; 431 } 432 433 const TargetInfo &getTargetInfo() const { return *Target; } 434 435 const LangOptions& getLangOpts() const { return LangOpts; } 436 437 DiagnosticsEngine &getDiagnostics() const; 438 439 FullSourceLoc getFullLoc(SourceLocation Loc) const { 440 return FullSourceLoc(Loc,SourceMgr); 441 } 442 443 /// \brief All comments in this translation unit. 444 RawCommentList Comments; 445 446 /// \brief True if comments are already loaded from ExternalASTSource. 447 mutable bool CommentsLoaded; 448 449 class RawCommentAndCacheFlags { 450 public: 451 enum Kind { 452 /// We searched for a comment attached to the particular declaration, but 453 /// didn't find any. 454 /// 455 /// getRaw() == 0. 456 NoCommentInDecl = 0, 457 458 /// We have found a comment attached to this particular declaration. 459 /// 460 /// getRaw() != 0. 461 FromDecl, 462 463 /// This declaration does not have an attached comment, and we have 464 /// searched the redeclaration chain. 465 /// 466 /// If getRaw() == 0, the whole redeclaration chain does not have any 467 /// comments. 468 /// 469 /// If getRaw() != 0, it is a comment propagated from other 470 /// redeclaration. 471 FromRedecl 472 }; 473 474 Kind getKind() const LLVM_READONLY { 475 return Data.getInt(); 476 } 477 478 void setKind(Kind K) { 479 Data.setInt(K); 480 } 481 482 const RawComment *getRaw() const LLVM_READONLY { 483 return Data.getPointer(); 484 } 485 486 void setRaw(const RawComment *RC) { 487 Data.setPointer(RC); 488 } 489 490 const Decl *getOriginalDecl() const LLVM_READONLY { 491 return OriginalDecl; 492 } 493 494 void setOriginalDecl(const Decl *Orig) { 495 OriginalDecl = Orig; 496 } 497 498 private: 499 llvm::PointerIntPair<const RawComment *, 2, Kind> Data; 500 const Decl *OriginalDecl; 501 }; 502 503 /// \brief Mapping from declarations to comments attached to any 504 /// redeclaration. 505 /// 506 /// Raw comments are owned by Comments list. This mapping is populated 507 /// lazily. 508 mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments; 509 510 /// \brief Mapping from declarations to parsed comments attached to any 511 /// redeclaration. 512 mutable llvm::DenseMap<const Decl *, comments::FullComment *> ParsedComments; 513 514 /// \brief Return the documentation comment attached to a given declaration, 515 /// without looking into cache. 516 RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 517 518public: 519 RawCommentList &getRawCommentList() { 520 return Comments; 521 } 522 523 void addComment(const RawComment &RC) { 524 assert(LangOpts.RetainCommentsFromSystemHeaders || 525 !SourceMgr.isInSystemHeader(RC.getSourceRange().getBegin())); 526 Comments.addComment(RC, BumpAlloc); 527 } 528 529 /// \brief Return the documentation comment attached to a given declaration. 530 /// Returns NULL if no comment is attached. 531 /// 532 /// \param OriginalDecl if not NULL, is set to declaration AST node that had 533 /// the comment, if the comment we found comes from a redeclaration. 534 const RawComment *getRawCommentForAnyRedecl( 535 const Decl *D, 536 const Decl **OriginalDecl = NULL) const; 537 538 /// Return parsed documentation comment attached to a given declaration. 539 /// Returns NULL if no comment is attached. 540 /// 541 /// \param PP the Preprocessor used with this TU. Could be NULL if 542 /// preprocessor is not available. 543 comments::FullComment *getCommentForDecl(const Decl *D, 544 const Preprocessor *PP) const; 545 546 comments::FullComment *cloneFullComment(comments::FullComment *FC, 547 const Decl *D) const; 548 549private: 550 mutable comments::CommandTraits CommentCommandTraits; 551 552public: 553 comments::CommandTraits &getCommentCommandTraits() const { 554 return CommentCommandTraits; 555 } 556 557 /// \brief Retrieve the attributes for the given declaration. 558 AttrVec& getDeclAttrs(const Decl *D); 559 560 /// \brief Erase the attributes corresponding to the given declaration. 561 void eraseDeclAttrs(const Decl *D); 562 563 /// \brief If this variable is an instantiated static data member of a 564 /// class template specialization, returns the templated static data member 565 /// from which it was instantiated. 566 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 567 const VarDecl *Var); 568 569 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 570 571 void setClassScopeSpecializationPattern(FunctionDecl *FD, 572 FunctionDecl *Pattern); 573 574 /// \brief Note that the static data member \p Inst is an instantiation of 575 /// the static data member template \p Tmpl of a class template. 576 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 577 TemplateSpecializationKind TSK, 578 SourceLocation PointOfInstantiation = SourceLocation()); 579 580 /// \brief If the given using decl \p Inst is an instantiation of a 581 /// (possibly unresolved) using decl from a template instantiation, 582 /// return it. 583 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 584 585 /// \brief Remember that the using decl \p Inst is an instantiation 586 /// of the using decl \p Pattern of a class template. 587 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 588 589 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 590 UsingShadowDecl *Pattern); 591 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 592 593 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 594 595 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 596 597 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 598 /// the non-bitfield \p LastFD. 599 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 600 const FieldDecl *LastFD) const; 601 602 /// \brief Return \c true if \p FD is a zero-length bitfield which follows 603 /// the bitfield \p LastFD. 604 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 605 const FieldDecl *LastFD) const; 606 607 /// \brief Return \c true if \p FD is a bitfield which follows the bitfield 608 /// \p LastFD. 609 bool BitfieldFollowsBitfield(const FieldDecl *FD, 610 const FieldDecl *LastFD) const; 611 612 /// \brief Return \c true if \p FD is not a bitfield which follows the 613 /// bitfield \p LastFD. 614 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 615 const FieldDecl *LastFD) const; 616 617 /// \brief Return \c true if \p FD is a bitfield which follows the 618 /// non-bitfield \p LastFD. 619 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 620 const FieldDecl *LastFD) const; 621 622 // Access to the set of methods overridden by the given C++ method. 623 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 624 overridden_cxx_method_iterator 625 overridden_methods_begin(const CXXMethodDecl *Method) const; 626 627 overridden_cxx_method_iterator 628 overridden_methods_end(const CXXMethodDecl *Method) const; 629 630 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 631 632 /// \brief Note that the given C++ \p Method overrides the given \p 633 /// Overridden method. 634 void addOverriddenMethod(const CXXMethodDecl *Method, 635 const CXXMethodDecl *Overridden); 636 637 /// \brief Return C++ or ObjC overridden methods for the given \p Method. 638 /// 639 /// An ObjC method is considered to override any method in the class's 640 /// base classes, its protocols, or its categories' protocols, that has 641 /// the same selector and is of the same kind (class or instance). 642 /// A method in an implementation is not considered as overriding the same 643 /// method in the interface or its categories. 644 void getOverriddenMethods( 645 const NamedDecl *Method, 646 SmallVectorImpl<const NamedDecl *> &Overridden) const; 647 648 /// \brief Notify the AST context that a new import declaration has been 649 /// parsed or implicitly created within this translation unit. 650 void addedLocalImportDecl(ImportDecl *Import); 651 652 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 653 return Import->NextLocalImport; 654 } 655 656 /// \brief Iterator that visits import declarations. 657 class import_iterator { 658 ImportDecl *Import; 659 660 public: 661 typedef ImportDecl *value_type; 662 typedef ImportDecl *reference; 663 typedef ImportDecl *pointer; 664 typedef int difference_type; 665 typedef std::forward_iterator_tag iterator_category; 666 667 import_iterator() : Import() { } 668 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 669 670 reference operator*() const { return Import; } 671 pointer operator->() const { return Import; } 672 673 import_iterator &operator++() { 674 Import = ASTContext::getNextLocalImport(Import); 675 return *this; 676 } 677 678 import_iterator operator++(int) { 679 import_iterator Other(*this); 680 ++(*this); 681 return Other; 682 } 683 684 friend bool operator==(import_iterator X, import_iterator Y) { 685 return X.Import == Y.Import; 686 } 687 688 friend bool operator!=(import_iterator X, import_iterator Y) { 689 return X.Import != Y.Import; 690 } 691 }; 692 693 import_iterator local_import_begin() const { 694 return import_iterator(FirstLocalImport); 695 } 696 import_iterator local_import_end() const { return import_iterator(); } 697 698 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 699 700 701 // Builtin Types. 702 CanQualType VoidTy; 703 CanQualType BoolTy; 704 CanQualType CharTy; 705 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 706 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 707 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 708 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 709 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 710 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 711 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 712 CanQualType FloatTy, DoubleTy, LongDoubleTy; 713 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 714 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 715 CanQualType VoidPtrTy, NullPtrTy; 716 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 717 CanQualType BuiltinFnTy; 718 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 719 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 720 CanQualType ObjCBuiltinBoolTy; 721 CanQualType OCLImage1dTy, OCLImage1dArrayTy, OCLImage1dBufferTy; 722 CanQualType OCLImage2dTy, OCLImage2dArrayTy; 723 CanQualType OCLImage3dTy; 724 725 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 726 mutable QualType AutoDeductTy; // Deduction against 'auto'. 727 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 728 729 // Type used to help define __builtin_va_list for some targets. 730 // The type is built when constructing 'BuiltinVaListDecl'. 731 mutable QualType VaListTagTy; 732 733 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 734 IdentifierTable &idents, SelectorTable &sels, 735 Builtin::Context &builtins, 736 unsigned size_reserve, 737 bool DelayInitialization = false); 738 739 ~ASTContext(); 740 741 /// \brief Attach an external AST source to the AST context. 742 /// 743 /// The external AST source provides the ability to load parts of 744 /// the abstract syntax tree as needed from some external storage, 745 /// e.g., a precompiled header. 746 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 747 748 /// \brief Retrieve a pointer to the external AST source associated 749 /// with this AST context, if any. 750 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 751 752 /// \brief Attach an AST mutation listener to the AST context. 753 /// 754 /// The AST mutation listener provides the ability to track modifications to 755 /// the abstract syntax tree entities committed after they were initially 756 /// created. 757 void setASTMutationListener(ASTMutationListener *Listener) { 758 this->Listener = Listener; 759 } 760 761 /// \brief Retrieve a pointer to the AST mutation listener associated 762 /// with this AST context, if any. 763 ASTMutationListener *getASTMutationListener() const { return Listener; } 764 765 void PrintStats() const; 766 const std::vector<Type*>& getTypes() const { return Types; } 767 768 /// \brief Retrieve the declaration for the 128-bit signed integer type. 769 TypedefDecl *getInt128Decl() const; 770 771 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 772 TypedefDecl *getUInt128Decl() const; 773 774 //===--------------------------------------------------------------------===// 775 // Type Constructors 776 //===--------------------------------------------------------------------===// 777 778private: 779 /// \brief Return a type with extended qualifiers. 780 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 781 782 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 783 784public: 785 /// \brief Return the uniqued reference to the type for an address space 786 /// qualified type with the specified type and address space. 787 /// 788 /// The resulting type has a union of the qualifiers from T and the address 789 /// space. If T already has an address space specifier, it is silently 790 /// replaced. 791 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 792 793 /// \brief Return the uniqued reference to the type for an Objective-C 794 /// gc-qualified type. 795 /// 796 /// The retulting type has a union of the qualifiers from T and the gc 797 /// attribute. 798 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 799 800 /// \brief Return the uniqued reference to the type for a \c restrict 801 /// qualified type. 802 /// 803 /// The resulting type has a union of the qualifiers from \p T and 804 /// \c restrict. 805 QualType getRestrictType(QualType T) const { 806 return T.withFastQualifiers(Qualifiers::Restrict); 807 } 808 809 /// \brief Return the uniqued reference to the type for a \c volatile 810 /// qualified type. 811 /// 812 /// The resulting type has a union of the qualifiers from \p T and 813 /// \c volatile. 814 QualType getVolatileType(QualType T) const { 815 return T.withFastQualifiers(Qualifiers::Volatile); 816 } 817 818 /// \brief Return the uniqued reference to the type for a \c const 819 /// qualified type. 820 /// 821 /// The resulting type has a union of the qualifiers from \p T and \c const. 822 /// 823 /// It can be reasonably expected that this will always be equivalent to 824 /// calling T.withConst(). 825 QualType getConstType(QualType T) const { return T.withConst(); } 826 827 /// \brief Change the ExtInfo on a function type. 828 const FunctionType *adjustFunctionType(const FunctionType *Fn, 829 FunctionType::ExtInfo EInfo); 830 831 /// \brief Return the uniqued reference to the type for a complex 832 /// number with the specified element type. 833 QualType getComplexType(QualType T) const; 834 CanQualType getComplexType(CanQualType T) const { 835 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 836 } 837 838 /// \brief Return the uniqued reference to the type for a pointer to 839 /// the specified type. 840 QualType getPointerType(QualType T) const; 841 CanQualType getPointerType(CanQualType T) const { 842 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 843 } 844 845 /// \brief Return the uniqued reference to the atomic type for the specified 846 /// type. 847 QualType getAtomicType(QualType T) const; 848 849 /// \brief Return the uniqued reference to the type for a block of the 850 /// specified type. 851 QualType getBlockPointerType(QualType T) const; 852 853 /// Gets the struct used to keep track of the descriptor for pointer to 854 /// blocks. 855 QualType getBlockDescriptorType() const; 856 857 /// Gets the struct used to keep track of the extended descriptor for 858 /// pointer to blocks. 859 QualType getBlockDescriptorExtendedType() const; 860 861 void setcudaConfigureCallDecl(FunctionDecl *FD) { 862 cudaConfigureCallDecl = FD; 863 } 864 FunctionDecl *getcudaConfigureCallDecl() { 865 return cudaConfigureCallDecl; 866 } 867 868 /// Returns true iff we need copy/dispose helpers for the given type. 869 bool BlockRequiresCopying(QualType Ty, const VarDecl *D); 870 871 872 /// Returns true, if given type has a known lifetime. HasByrefExtendedLayout is set 873 /// to false in this case. If HasByrefExtendedLayout returns true, byref variable 874 /// has extended lifetime. 875 bool getByrefLifetime(QualType Ty, 876 Qualifiers::ObjCLifetime &Lifetime, 877 bool &HasByrefExtendedLayout) const; 878 879 /// \brief Return the uniqued reference to the type for an lvalue reference 880 /// to the specified type. 881 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 882 const; 883 884 /// \brief Return the uniqued reference to the type for an rvalue reference 885 /// to the specified type. 886 QualType getRValueReferenceType(QualType T) const; 887 888 /// \brief Return the uniqued reference to the type for a member pointer to 889 /// the specified type in the specified class. 890 /// 891 /// The class \p Cls is a \c Type because it could be a dependent name. 892 QualType getMemberPointerType(QualType T, const Type *Cls) const; 893 894 /// \brief Return a non-unique reference to the type for a variable array of 895 /// the specified element type. 896 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 897 ArrayType::ArraySizeModifier ASM, 898 unsigned IndexTypeQuals, 899 SourceRange Brackets) const; 900 901 /// \brief Return a non-unique reference to the type for a dependently-sized 902 /// array of the specified element type. 903 /// 904 /// FIXME: We will need these to be uniqued, or at least comparable, at some 905 /// point. 906 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 907 ArrayType::ArraySizeModifier ASM, 908 unsigned IndexTypeQuals, 909 SourceRange Brackets) const; 910 911 /// \brief Return a unique reference to the type for an incomplete array of 912 /// the specified element type. 913 QualType getIncompleteArrayType(QualType EltTy, 914 ArrayType::ArraySizeModifier ASM, 915 unsigned IndexTypeQuals) const; 916 917 /// \brief Return the unique reference to the type for a constant array of 918 /// the specified element type. 919 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 920 ArrayType::ArraySizeModifier ASM, 921 unsigned IndexTypeQuals) const; 922 923 /// \brief Returns a vla type where known sizes are replaced with [*]. 924 QualType getVariableArrayDecayedType(QualType Ty) const; 925 926 /// \brief Return the unique reference to a vector type of the specified 927 /// element type and size. 928 /// 929 /// \pre \p VectorType must be a built-in type. 930 QualType getVectorType(QualType VectorType, unsigned NumElts, 931 VectorType::VectorKind VecKind) const; 932 933 /// \brief Return the unique reference to an extended vector type 934 /// of the specified element type and size. 935 /// 936 /// \pre \p VectorType must be a built-in type. 937 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 938 939 /// \pre Return a non-unique reference to the type for a dependently-sized 940 /// vector of the specified element type. 941 /// 942 /// FIXME: We will need these to be uniqued, or at least comparable, at some 943 /// point. 944 QualType getDependentSizedExtVectorType(QualType VectorType, 945 Expr *SizeExpr, 946 SourceLocation AttrLoc) const; 947 948 /// \brief Return a K&R style C function type like 'int()'. 949 QualType getFunctionNoProtoType(QualType ResultTy, 950 const FunctionType::ExtInfo &Info) const; 951 952 QualType getFunctionNoProtoType(QualType ResultTy) const { 953 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 954 } 955 956 /// \brief Return a normal function type with a typed argument list. 957 QualType getFunctionType(QualType ResultTy, 958 const QualType *Args, unsigned NumArgs, 959 const FunctionProtoType::ExtProtoInfo &EPI) const; 960 961 /// \brief Return the unique reference to the type for the specified type 962 /// declaration. 963 QualType getTypeDeclType(const TypeDecl *Decl, 964 const TypeDecl *PrevDecl = 0) const { 965 assert(Decl && "Passed null for Decl param"); 966 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 967 968 if (PrevDecl) { 969 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 970 Decl->TypeForDecl = PrevDecl->TypeForDecl; 971 return QualType(PrevDecl->TypeForDecl, 0); 972 } 973 974 return getTypeDeclTypeSlow(Decl); 975 } 976 977 /// \brief Return the unique reference to the type for the specified 978 /// typedef-name decl. 979 QualType getTypedefType(const TypedefNameDecl *Decl, 980 QualType Canon = QualType()) const; 981 982 QualType getRecordType(const RecordDecl *Decl) const; 983 984 QualType getEnumType(const EnumDecl *Decl) const; 985 986 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 987 988 QualType getAttributedType(AttributedType::Kind attrKind, 989 QualType modifiedType, 990 QualType equivalentType); 991 992 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 993 QualType Replacement) const; 994 QualType getSubstTemplateTypeParmPackType( 995 const TemplateTypeParmType *Replaced, 996 const TemplateArgument &ArgPack); 997 998 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 999 bool ParameterPack, 1000 TemplateTypeParmDecl *ParmDecl = 0) const; 1001 1002 QualType getTemplateSpecializationType(TemplateName T, 1003 const TemplateArgument *Args, 1004 unsigned NumArgs, 1005 QualType Canon = QualType()) const; 1006 1007 QualType getCanonicalTemplateSpecializationType(TemplateName T, 1008 const TemplateArgument *Args, 1009 unsigned NumArgs) const; 1010 1011 QualType getTemplateSpecializationType(TemplateName T, 1012 const TemplateArgumentListInfo &Args, 1013 QualType Canon = QualType()) const; 1014 1015 TypeSourceInfo * 1016 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 1017 const TemplateArgumentListInfo &Args, 1018 QualType Canon = QualType()) const; 1019 1020 QualType getParenType(QualType NamedType) const; 1021 1022 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1023 NestedNameSpecifier *NNS, 1024 QualType NamedType) const; 1025 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 1026 NestedNameSpecifier *NNS, 1027 const IdentifierInfo *Name, 1028 QualType Canon = QualType()) const; 1029 1030 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1031 NestedNameSpecifier *NNS, 1032 const IdentifierInfo *Name, 1033 const TemplateArgumentListInfo &Args) const; 1034 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 1035 NestedNameSpecifier *NNS, 1036 const IdentifierInfo *Name, 1037 unsigned NumArgs, 1038 const TemplateArgument *Args) const; 1039 1040 QualType getPackExpansionType(QualType Pattern, 1041 llvm::Optional<unsigned> NumExpansions); 1042 1043 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1044 ObjCInterfaceDecl *PrevDecl = 0) const; 1045 1046 QualType getObjCObjectType(QualType Base, 1047 ObjCProtocolDecl * const *Protocols, 1048 unsigned NumProtocols) const; 1049 1050 /// \brief Return a ObjCObjectPointerType type for the given ObjCObjectType. 1051 QualType getObjCObjectPointerType(QualType OIT) const; 1052 1053 /// \brief GCC extension. 1054 QualType getTypeOfExprType(Expr *e) const; 1055 QualType getTypeOfType(QualType t) const; 1056 1057 /// \brief C++11 decltype. 1058 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 1059 1060 /// \brief Unary type transforms 1061 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 1062 UnaryTransformType::UTTKind UKind) const; 1063 1064 /// \brief C++11 deduced auto type. 1065 QualType getAutoType(QualType DeducedType) const; 1066 1067 /// \brief C++11 deduction pattern for 'auto' type. 1068 QualType getAutoDeductType() const; 1069 1070 /// \brief C++11 deduction pattern for 'auto &&' type. 1071 QualType getAutoRRefDeductType() const; 1072 1073 /// \brief Return the unique reference to the type for the specified TagDecl 1074 /// (struct/union/class/enum) decl. 1075 QualType getTagDeclType(const TagDecl *Decl) const; 1076 1077 /// \brief Return the unique type for "size_t" (C99 7.17), defined in 1078 /// <stddef.h>. 1079 /// 1080 /// The sizeof operator requires this (C99 6.5.3.4p4). 1081 CanQualType getSizeType() const; 1082 1083 /// \brief Return the unique type for "intmax_t" (C99 7.18.1.5), defined in 1084 /// <stdint.h>. 1085 CanQualType getIntMaxType() const; 1086 1087 /// \brief Return the unique type for "uintmax_t" (C99 7.18.1.5), defined in 1088 /// <stdint.h>. 1089 CanQualType getUIntMaxType() const; 1090 1091 /// \brief In C++, this returns the unique wchar_t type. In C99, this 1092 /// returns a type compatible with the type defined in <stddef.h> as defined 1093 /// by the target. 1094 QualType getWCharType() const { return WCharTy; } 1095 1096 /// \brief Return the type of "signed wchar_t". 1097 /// 1098 /// Used when in C++, as a GCC extension. 1099 QualType getSignedWCharType() const; 1100 1101 /// \brief Return the type of "unsigned wchar_t". 1102 /// 1103 /// Used when in C++, as a GCC extension. 1104 QualType getUnsignedWCharType() const; 1105 1106 /// \brief In C99, this returns a type compatible with the type 1107 /// defined in <stddef.h> as defined by the target. 1108 QualType getWIntType() const { return WIntTy; } 1109 1110 /// \brief Return the unique type for "ptrdiff_t" (C99 7.17) defined in 1111 /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1112 QualType getPointerDiffType() const; 1113 1114 /// \brief Return the unique type for "pid_t" defined in 1115 /// <sys/types.h>. We need this to compute the correct type for vfork(). 1116 QualType getProcessIDType() const; 1117 1118 /// \brief Return the C structure type used to represent constant CFStrings. 1119 QualType getCFConstantStringType() const; 1120 1121 /// \brief Returns the C struct type for objc_super 1122 QualType getObjCSuperType() const; 1123 void setObjCSuperType(QualType ST) { ObjCSuperType = ST; } 1124 1125 /// Get the structure type used to representation CFStrings, or NULL 1126 /// if it hasn't yet been built. 1127 QualType getRawCFConstantStringType() const { 1128 if (CFConstantStringTypeDecl) 1129 return getTagDeclType(CFConstantStringTypeDecl); 1130 return QualType(); 1131 } 1132 void setCFConstantStringType(QualType T); 1133 1134 // This setter/getter represents the ObjC type for an NSConstantString. 1135 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 1136 QualType getObjCConstantStringInterface() const { 1137 return ObjCConstantStringType; 1138 } 1139 1140 QualType getObjCNSStringType() const { 1141 return ObjCNSStringType; 1142 } 1143 1144 void setObjCNSStringType(QualType T) { 1145 ObjCNSStringType = T; 1146 } 1147 1148 /// \brief Retrieve the type that \c id has been defined to, which may be 1149 /// different from the built-in \c id if \c id has been typedef'd. 1150 QualType getObjCIdRedefinitionType() const { 1151 if (ObjCIdRedefinitionType.isNull()) 1152 return getObjCIdType(); 1153 return ObjCIdRedefinitionType; 1154 } 1155 1156 /// \brief Set the user-written type that redefines \c id. 1157 void setObjCIdRedefinitionType(QualType RedefType) { 1158 ObjCIdRedefinitionType = RedefType; 1159 } 1160 1161 /// \brief Retrieve the type that \c Class has been defined to, which may be 1162 /// different from the built-in \c Class if \c Class has been typedef'd. 1163 QualType getObjCClassRedefinitionType() const { 1164 if (ObjCClassRedefinitionType.isNull()) 1165 return getObjCClassType(); 1166 return ObjCClassRedefinitionType; 1167 } 1168 1169 /// \brief Set the user-written type that redefines 'SEL'. 1170 void setObjCClassRedefinitionType(QualType RedefType) { 1171 ObjCClassRedefinitionType = RedefType; 1172 } 1173 1174 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1175 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1176 QualType getObjCSelRedefinitionType() const { 1177 if (ObjCSelRedefinitionType.isNull()) 1178 return getObjCSelType(); 1179 return ObjCSelRedefinitionType; 1180 } 1181 1182 1183 /// \brief Set the user-written type that redefines 'SEL'. 1184 void setObjCSelRedefinitionType(QualType RedefType) { 1185 ObjCSelRedefinitionType = RedefType; 1186 } 1187 1188 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1189 /// otherwise, returns a NULL type; 1190 QualType getObjCInstanceType() { 1191 return getTypeDeclType(getObjCInstanceTypeDecl()); 1192 } 1193 1194 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1195 /// "instancetype" type. 1196 TypedefDecl *getObjCInstanceTypeDecl(); 1197 1198 /// \brief Set the type for the C FILE type. 1199 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1200 1201 /// \brief Retrieve the C FILE type. 1202 QualType getFILEType() const { 1203 if (FILEDecl) 1204 return getTypeDeclType(FILEDecl); 1205 return QualType(); 1206 } 1207 1208 /// \brief Set the type for the C jmp_buf type. 1209 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1210 this->jmp_bufDecl = jmp_bufDecl; 1211 } 1212 1213 /// \brief Retrieve the C jmp_buf type. 1214 QualType getjmp_bufType() const { 1215 if (jmp_bufDecl) 1216 return getTypeDeclType(jmp_bufDecl); 1217 return QualType(); 1218 } 1219 1220 /// \brief Set the type for the C sigjmp_buf type. 1221 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1222 this->sigjmp_bufDecl = sigjmp_bufDecl; 1223 } 1224 1225 /// \brief Retrieve the C sigjmp_buf type. 1226 QualType getsigjmp_bufType() const { 1227 if (sigjmp_bufDecl) 1228 return getTypeDeclType(sigjmp_bufDecl); 1229 return QualType(); 1230 } 1231 1232 /// \brief Set the type for the C ucontext_t type. 1233 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1234 this->ucontext_tDecl = ucontext_tDecl; 1235 } 1236 1237 /// \brief Retrieve the C ucontext_t type. 1238 QualType getucontext_tType() const { 1239 if (ucontext_tDecl) 1240 return getTypeDeclType(ucontext_tDecl); 1241 return QualType(); 1242 } 1243 1244 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1245 QualType getLogicalOperationType() const { 1246 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1247 } 1248 1249 /// \brief Emit the Objective-CC type encoding for the given type \p T into 1250 /// \p S. 1251 /// 1252 /// If \p Field is specified then record field names are also encoded. 1253 void getObjCEncodingForType(QualType T, std::string &S, 1254 const FieldDecl *Field=0) const; 1255 1256 void getLegacyIntegralTypeEncoding(QualType &t) const; 1257 1258 /// \brief Put the string version of the type qualifiers \p QT into \p S. 1259 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1260 std::string &S) const; 1261 1262 /// \brief Emit the encoded type for the function \p Decl into \p S. 1263 /// 1264 /// This is in the same format as Objective-C method encodings. 1265 /// 1266 /// \returns true if an error occurred (e.g., because one of the parameter 1267 /// types is incomplete), false otherwise. 1268 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1269 1270 /// \brief Emit the encoded type for the method declaration \p Decl into 1271 /// \p S. 1272 /// 1273 /// \returns true if an error occurred (e.g., because one of the parameter 1274 /// types is incomplete), false otherwise. 1275 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1276 bool Extended = false) 1277 const; 1278 1279 /// \brief Return the encoded type for this block declaration. 1280 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1281 1282 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1283 /// this method declaration. If non-NULL, Container must be either 1284 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1285 /// only be NULL when getting encodings for protocol properties. 1286 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1287 const Decl *Container, 1288 std::string &S) const; 1289 1290 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1291 ObjCProtocolDecl *rProto) const; 1292 1293 /// \brief Return the size of type \p T for Objective-C encoding purpose, 1294 /// in characters. 1295 CharUnits getObjCEncodingTypeSize(QualType T) const; 1296 1297 /// \brief Retrieve the typedef corresponding to the predefined \c id type 1298 /// in Objective-C. 1299 TypedefDecl *getObjCIdDecl() const; 1300 1301 /// \brief Represents the Objective-CC \c id type. 1302 /// 1303 /// This is set up lazily, by Sema. \c id is always a (typedef for a) 1304 /// pointer type, a pointer to a struct. 1305 QualType getObjCIdType() const { 1306 return getTypeDeclType(getObjCIdDecl()); 1307 } 1308 1309 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1310 /// in Objective-C. 1311 TypedefDecl *getObjCSelDecl() const; 1312 1313 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1314 /// 'SEL' type. 1315 QualType getObjCSelType() const { 1316 return getTypeDeclType(getObjCSelDecl()); 1317 } 1318 1319 /// \brief Retrieve the typedef declaration corresponding to the predefined 1320 /// Objective-C 'Class' type. 1321 TypedefDecl *getObjCClassDecl() const; 1322 1323 /// \brief Represents the Objective-C \c Class type. 1324 /// 1325 /// This is set up lazily, by Sema. \c Class is always a (typedef for a) 1326 /// pointer type, a pointer to a struct. 1327 QualType getObjCClassType() const { 1328 return getTypeDeclType(getObjCClassDecl()); 1329 } 1330 1331 /// \brief Retrieve the Objective-C class declaration corresponding to 1332 /// the predefined \c Protocol class. 1333 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1334 1335 /// \brief Retrieve declaration of 'BOOL' typedef 1336 TypedefDecl *getBOOLDecl() const { 1337 return BOOLDecl; 1338 } 1339 1340 /// \brief Save declaration of 'BOOL' typedef 1341 void setBOOLDecl(TypedefDecl *TD) { 1342 BOOLDecl = TD; 1343 } 1344 1345 /// \brief type of 'BOOL' type. 1346 QualType getBOOLType() const { 1347 return getTypeDeclType(getBOOLDecl()); 1348 } 1349 1350 /// \brief Retrieve the type of the Objective-C \c Protocol class. 1351 QualType getObjCProtoType() const { 1352 return getObjCInterfaceType(getObjCProtocolDecl()); 1353 } 1354 1355 /// \brief Retrieve the C type declaration corresponding to the predefined 1356 /// \c __builtin_va_list type. 1357 TypedefDecl *getBuiltinVaListDecl() const; 1358 1359 /// \brief Retrieve the type of the \c __builtin_va_list type. 1360 QualType getBuiltinVaListType() const { 1361 return getTypeDeclType(getBuiltinVaListDecl()); 1362 } 1363 1364 /// \brief Retrieve the C type declaration corresponding to the predefined 1365 /// \c __va_list_tag type used to help define the \c __builtin_va_list type 1366 /// for some targets. 1367 QualType getVaListTagType() const; 1368 1369 /// \brief Return a type with additional \c const, \c volatile, or 1370 /// \c restrict qualifiers. 1371 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1372 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1373 } 1374 1375 /// \brief Un-split a SplitQualType. 1376 QualType getQualifiedType(SplitQualType split) const { 1377 return getQualifiedType(split.Ty, split.Quals); 1378 } 1379 1380 /// \brief Return a type with additional qualifiers. 1381 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1382 if (!Qs.hasNonFastQualifiers()) 1383 return T.withFastQualifiers(Qs.getFastQualifiers()); 1384 QualifierCollector Qc(Qs); 1385 const Type *Ptr = Qc.strip(T); 1386 return getExtQualType(Ptr, Qc); 1387 } 1388 1389 /// \brief Return a type with additional qualifiers. 1390 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1391 if (!Qs.hasNonFastQualifiers()) 1392 return QualType(T, Qs.getFastQualifiers()); 1393 return getExtQualType(T, Qs); 1394 } 1395 1396 /// \brief Return a type with the given lifetime qualifier. 1397 /// 1398 /// \pre Neither type.ObjCLifetime() nor \p lifetime may be \c OCL_None. 1399 QualType getLifetimeQualifiedType(QualType type, 1400 Qualifiers::ObjCLifetime lifetime) { 1401 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1402 assert(lifetime != Qualifiers::OCL_None); 1403 1404 Qualifiers qs; 1405 qs.addObjCLifetime(lifetime); 1406 return getQualifiedType(type, qs); 1407 } 1408 1409 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1410 SourceLocation NameLoc) const; 1411 1412 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1413 UnresolvedSetIterator End) const; 1414 1415 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1416 bool TemplateKeyword, 1417 TemplateDecl *Template) const; 1418 1419 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1420 const IdentifierInfo *Name) const; 1421 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1422 OverloadedOperatorKind Operator) const; 1423 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1424 TemplateName replacement) const; 1425 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1426 const TemplateArgument &ArgPack) const; 1427 1428 enum GetBuiltinTypeError { 1429 GE_None, ///< No error 1430 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1431 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1432 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1433 }; 1434 1435 /// \brief Return the type for the specified builtin. 1436 /// 1437 /// If \p IntegerConstantArgs is non-null, it is filled in with a bitmask of 1438 /// arguments to the builtin that are required to be integer constant 1439 /// expressions. 1440 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1441 unsigned *IntegerConstantArgs = 0) const; 1442 1443private: 1444 CanQualType getFromTargetType(unsigned Type) const; 1445 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1446 1447 //===--------------------------------------------------------------------===// 1448 // Type Predicates. 1449 //===--------------------------------------------------------------------===// 1450 1451public: 1452 /// \brief Return one of the GCNone, Weak or Strong Objective-C garbage 1453 /// collection attributes. 1454 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1455 1456 /// \brief Return true if the given vector types are of the same unqualified 1457 /// type or if they are equivalent to the same GCC vector type. 1458 /// 1459 /// \note This ignores whether they are target-specific (AltiVec or Neon) 1460 /// types. 1461 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1462 1463 /// \brief Return true if this is an \c NSObject object with its \c NSObject 1464 /// attribute set. 1465 static bool isObjCNSObjectType(QualType Ty) { 1466 return Ty->isObjCNSObjectType(); 1467 } 1468 1469 //===--------------------------------------------------------------------===// 1470 // Type Sizing and Analysis 1471 //===--------------------------------------------------------------------===// 1472 1473 /// \brief Return the APFloat 'semantics' for the specified scalar floating 1474 /// point type. 1475 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1476 1477 /// \brief Get the size and alignment of the specified complete type in bits. 1478 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1479 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1480 return getTypeInfo(T.getTypePtr()); 1481 } 1482 1483 /// \brief Return the size of the specified (complete) type \p T, in bits. 1484 uint64_t getTypeSize(QualType T) const { 1485 return getTypeInfo(T).first; 1486 } 1487 uint64_t getTypeSize(const Type *T) const { 1488 return getTypeInfo(T).first; 1489 } 1490 1491 /// \brief Return the size of the character type, in bits. 1492 uint64_t getCharWidth() const { 1493 return getTypeSize(CharTy); 1494 } 1495 1496 /// \brief Convert a size in bits to a size in characters. 1497 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1498 1499 /// \brief Convert a size in characters to a size in bits. 1500 int64_t toBits(CharUnits CharSize) const; 1501 1502 /// \brief Return the size of the specified (complete) type \p T, in 1503 /// characters. 1504 CharUnits getTypeSizeInChars(QualType T) const; 1505 CharUnits getTypeSizeInChars(const Type *T) const; 1506 1507 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1508 /// bits. 1509 unsigned getTypeAlign(QualType T) const { 1510 return getTypeInfo(T).second; 1511 } 1512 unsigned getTypeAlign(const Type *T) const { 1513 return getTypeInfo(T).second; 1514 } 1515 1516 /// \brief Return the ABI-specified alignment of a (complete) type \p T, in 1517 /// characters. 1518 CharUnits getTypeAlignInChars(QualType T) const; 1519 CharUnits getTypeAlignInChars(const Type *T) const; 1520 1521 // getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the 1522 // type is a record, its data size is returned. 1523 std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const; 1524 1525 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1526 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1527 1528 /// \brief Return the "preferred" alignment of the specified type \p T for 1529 /// the current target, in bits. 1530 /// 1531 /// This can be different than the ABI alignment in cases where it is 1532 /// beneficial for performance to overalign a data type. 1533 unsigned getPreferredTypeAlign(const Type *T) const; 1534 1535 /// \brief Return a conservative estimate of the alignment of the specified 1536 /// decl \p D. 1537 /// 1538 /// \pre \p D must not be a bitfield type, as bitfields do not have a valid 1539 /// alignment. 1540 /// 1541 /// If \p RefAsPointee, references are treated like their underlying type 1542 /// (for alignof), else they're treated like pointers (for CodeGen). 1543 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1544 1545 /// \brief Get or compute information about the layout of the specified 1546 /// record (struct/union/class) \p D, which indicates its size and field 1547 /// position information. 1548 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1549 1550 /// \brief Get or compute information about the layout of the specified 1551 /// Objective-C interface. 1552 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1553 const; 1554 1555 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1556 bool Simple = false) const; 1557 1558 /// \brief Get or compute information about the layout of the specified 1559 /// Objective-C implementation. 1560 /// 1561 /// This may differ from the interface if synthesized ivars are present. 1562 const ASTRecordLayout & 1563 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1564 1565 /// \brief Get the key function for the given record decl, or NULL if there 1566 /// isn't one. 1567 /// 1568 /// The key function is, according to the Itanium C++ ABI section 5.2.3: 1569 /// 1570 /// ...the first non-pure virtual function that is not inline at the point 1571 /// of class definition. 1572 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1573 1574 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1575 uint64_t getFieldOffset(const ValueDecl *FD) const; 1576 1577 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1578 1579 MangleContext *createMangleContext(); 1580 1581 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1582 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1583 1584 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1585 void CollectInheritedProtocols(const Decl *CDecl, 1586 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1587 1588 //===--------------------------------------------------------------------===// 1589 // Type Operators 1590 //===--------------------------------------------------------------------===// 1591 1592 /// \brief Return the canonical (structural) type corresponding to the 1593 /// specified potentially non-canonical type \p T. 1594 /// 1595 /// The non-canonical version of a type may have many "decorated" versions of 1596 /// types. Decorators can include typedefs, 'typeof' operators, etc. The 1597 /// returned type is guaranteed to be free of any of these, allowing two 1598 /// canonical types to be compared for exact equality with a simple pointer 1599 /// comparison. 1600 CanQualType getCanonicalType(QualType T) const { 1601 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1602 } 1603 1604 const Type *getCanonicalType(const Type *T) const { 1605 return T->getCanonicalTypeInternal().getTypePtr(); 1606 } 1607 1608 /// \brief Return the canonical parameter type corresponding to the specific 1609 /// potentially non-canonical one. 1610 /// 1611 /// Qualifiers are stripped off, functions are turned into function 1612 /// pointers, and arrays decay one level into pointers. 1613 CanQualType getCanonicalParamType(QualType T) const; 1614 1615 /// \brief Determine whether the given types \p T1 and \p T2 are equivalent. 1616 bool hasSameType(QualType T1, QualType T2) const { 1617 return getCanonicalType(T1) == getCanonicalType(T2); 1618 } 1619 1620 /// \brief Return this type as a completely-unqualified array type, 1621 /// capturing the qualifiers in \p Quals. 1622 /// 1623 /// This will remove the minimal amount of sugaring from the types, similar 1624 /// to the behavior of QualType::getUnqualifiedType(). 1625 /// 1626 /// \param T is the qualified type, which may be an ArrayType 1627 /// 1628 /// \param Quals will receive the full set of qualifiers that were 1629 /// applied to the array. 1630 /// 1631 /// \returns if this is an array type, the completely unqualified array type 1632 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1633 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1634 1635 /// \brief Determine whether the given types are equivalent after 1636 /// cvr-qualifiers have been removed. 1637 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1638 return getCanonicalType(T1).getTypePtr() == 1639 getCanonicalType(T2).getTypePtr(); 1640 } 1641 1642 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1643 1644 /// \brief Retrieves the "canonical" nested name specifier for a 1645 /// given nested name specifier. 1646 /// 1647 /// The canonical nested name specifier is a nested name specifier 1648 /// that uniquely identifies a type or namespace within the type 1649 /// system. For example, given: 1650 /// 1651 /// \code 1652 /// namespace N { 1653 /// struct S { 1654 /// template<typename T> struct X { typename T* type; }; 1655 /// }; 1656 /// } 1657 /// 1658 /// template<typename T> struct Y { 1659 /// typename N::S::X<T>::type member; 1660 /// }; 1661 /// \endcode 1662 /// 1663 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1664 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1665 /// by declarations in the type system and the canonical type for 1666 /// the template type parameter 'T' is template-param-0-0. 1667 NestedNameSpecifier * 1668 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1669 1670 /// \brief Retrieves the default calling convention to use for 1671 /// C++ instance methods. 1672 CallingConv getDefaultCXXMethodCallConv(bool isVariadic); 1673 1674 /// \brief Retrieves the canonical representation of the given 1675 /// calling convention. 1676 CallingConv getCanonicalCallConv(CallingConv CC) const; 1677 1678 /// \brief Determines whether two calling conventions name the same 1679 /// calling convention. 1680 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1681 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1682 } 1683 1684 /// \brief Retrieves the "canonical" template name that refers to a 1685 /// given template. 1686 /// 1687 /// The canonical template name is the simplest expression that can 1688 /// be used to refer to a given template. For most templates, this 1689 /// expression is just the template declaration itself. For example, 1690 /// the template std::vector can be referred to via a variety of 1691 /// names---std::vector, \::std::vector, vector (if vector is in 1692 /// scope), etc.---but all of these names map down to the same 1693 /// TemplateDecl, which is used to form the canonical template name. 1694 /// 1695 /// Dependent template names are more interesting. Here, the 1696 /// template name could be something like T::template apply or 1697 /// std::allocator<T>::template rebind, where the nested name 1698 /// specifier itself is dependent. In this case, the canonical 1699 /// template name uses the shortest form of the dependent 1700 /// nested-name-specifier, which itself contains all canonical 1701 /// types, values, and templates. 1702 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1703 1704 /// \brief Determine whether the given template names refer to the same 1705 /// template. 1706 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1707 1708 /// \brief Retrieve the "canonical" template argument. 1709 /// 1710 /// The canonical template argument is the simplest template argument 1711 /// (which may be a type, value, expression, or declaration) that 1712 /// expresses the value of the argument. 1713 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1714 const; 1715 1716 /// Type Query functions. If the type is an instance of the specified class, 1717 /// return the Type pointer for the underlying maximally pretty type. This 1718 /// is a member of ASTContext because this may need to do some amount of 1719 /// canonicalization, e.g. to move type qualifiers into the element type. 1720 const ArrayType *getAsArrayType(QualType T) const; 1721 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1722 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1723 } 1724 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1725 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1726 } 1727 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1728 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1729 } 1730 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1731 const { 1732 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1733 } 1734 1735 /// \brief Return the innermost element type of an array type. 1736 /// 1737 /// For example, will return "int" for int[m][n] 1738 QualType getBaseElementType(const ArrayType *VAT) const; 1739 1740 /// \brief Return the innermost element type of a type (which needn't 1741 /// actually be an array type). 1742 QualType getBaseElementType(QualType QT) const; 1743 1744 /// \brief Return number of constant array elements. 1745 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1746 1747 /// \brief Perform adjustment on the parameter type of a function. 1748 /// 1749 /// This routine adjusts the given parameter type @p T to the actual 1750 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1751 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1752 QualType getAdjustedParameterType(QualType T) const; 1753 1754 /// \brief Retrieve the parameter type as adjusted for use in the signature 1755 /// of a function, decaying array and function types and removing top-level 1756 /// cv-qualifiers. 1757 QualType getSignatureParameterType(QualType T) const; 1758 1759 /// \brief Return the properly qualified result of decaying the specified 1760 /// array type to a pointer. 1761 /// 1762 /// This operation is non-trivial when handling typedefs etc. The canonical 1763 /// type of \p T must be an array type, this returns a pointer to a properly 1764 /// qualified element of the array. 1765 /// 1766 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1767 QualType getArrayDecayedType(QualType T) const; 1768 1769 /// \brief Return the type that \p PromotableType will promote to: C99 1770 /// 6.3.1.1p2, assuming that \p PromotableType is a promotable integer type. 1771 QualType getPromotedIntegerType(QualType PromotableType) const; 1772 1773 /// \brief Recurses in pointer/array types until it finds an Objective-C 1774 /// retainable type and returns its ownership. 1775 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1776 1777 /// \brief Whether this is a promotable bitfield reference according 1778 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1779 /// 1780 /// \returns the type this bit-field will promote to, or NULL if no 1781 /// promotion occurs. 1782 QualType isPromotableBitField(Expr *E) const; 1783 1784 /// \brief Return the highest ranked integer type, see C99 6.3.1.8p1. 1785 /// 1786 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1787 /// \p LHS < \p RHS, return -1. 1788 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1789 1790 /// \brief Compare the rank of the two specified floating point types, 1791 /// ignoring the domain of the type (i.e. 'double' == '_Complex double'). 1792 /// 1793 /// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If 1794 /// \p LHS < \p RHS, return -1. 1795 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1796 1797 /// \brief Return a real floating point or a complex type (based on 1798 /// \p typeDomain/\p typeSize). 1799 /// 1800 /// \param typeDomain a real floating point or complex type. 1801 /// \param typeSize a real floating point or complex type. 1802 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1803 QualType typeDomain) const; 1804 1805 unsigned getTargetAddressSpace(QualType T) const { 1806 return getTargetAddressSpace(T.getQualifiers()); 1807 } 1808 1809 unsigned getTargetAddressSpace(Qualifiers Q) const { 1810 return getTargetAddressSpace(Q.getAddressSpace()); 1811 } 1812 1813 unsigned getTargetAddressSpace(unsigned AS) const { 1814 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1815 return AS; 1816 else 1817 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1818 } 1819 1820private: 1821 // Helper for integer ordering 1822 unsigned getIntegerRank(const Type *T) const; 1823 1824public: 1825 1826 //===--------------------------------------------------------------------===// 1827 // Type Compatibility Predicates 1828 //===--------------------------------------------------------------------===// 1829 1830 /// Compatibility predicates used to check assignment expressions. 1831 bool typesAreCompatible(QualType T1, QualType T2, 1832 bool CompareUnqualified = false); // C99 6.2.7p1 1833 1834 bool propertyTypesAreCompatible(QualType, QualType); 1835 bool typesAreBlockPointerCompatible(QualType, QualType); 1836 1837 bool isObjCIdType(QualType T) const { 1838 return T == getObjCIdType(); 1839 } 1840 bool isObjCClassType(QualType T) const { 1841 return T == getObjCClassType(); 1842 } 1843 bool isObjCSelType(QualType T) const { 1844 return T == getObjCSelType(); 1845 } 1846 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1847 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1848 bool ForCompare); 1849 1850 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1851 1852 // Check the safety of assignment from LHS to RHS 1853 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1854 const ObjCObjectPointerType *RHSOPT); 1855 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1856 const ObjCObjectType *RHS); 1857 bool canAssignObjCInterfacesInBlockPointer( 1858 const ObjCObjectPointerType *LHSOPT, 1859 const ObjCObjectPointerType *RHSOPT, 1860 bool BlockReturnType); 1861 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1862 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1863 const ObjCObjectPointerType *RHSOPT); 1864 bool canBindObjCObjectType(QualType To, QualType From); 1865 1866 // Functions for calculating composite types 1867 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1868 bool Unqualified = false, bool BlockReturnType = false); 1869 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1870 bool Unqualified = false); 1871 QualType mergeFunctionArgumentTypes(QualType, QualType, 1872 bool OfBlockPointer=false, 1873 bool Unqualified = false); 1874 QualType mergeTransparentUnionType(QualType, QualType, 1875 bool OfBlockPointer=false, 1876 bool Unqualified = false); 1877 1878 QualType mergeObjCGCQualifiers(QualType, QualType); 1879 1880 bool FunctionTypesMatchOnNSConsumedAttrs( 1881 const FunctionProtoType *FromFunctionType, 1882 const FunctionProtoType *ToFunctionType); 1883 1884 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1885 ObjCLayouts[CD] = 0; 1886 } 1887 1888 //===--------------------------------------------------------------------===// 1889 // Integer Predicates 1890 //===--------------------------------------------------------------------===// 1891 1892 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1893 // of bits in an integer type excluding any padding bits. 1894 unsigned getIntWidth(QualType T) const; 1895 1896 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1897 // unsigned integer type. This method takes a signed type, and returns the 1898 // corresponding unsigned integer type. 1899 QualType getCorrespondingUnsignedType(QualType T) const; 1900 1901 //===--------------------------------------------------------------------===// 1902 // Type Iterators. 1903 //===--------------------------------------------------------------------===// 1904 1905 typedef std::vector<Type*>::iterator type_iterator; 1906 typedef std::vector<Type*>::const_iterator const_type_iterator; 1907 1908 type_iterator types_begin() { return Types.begin(); } 1909 type_iterator types_end() { return Types.end(); } 1910 const_type_iterator types_begin() const { return Types.begin(); } 1911 const_type_iterator types_end() const { return Types.end(); } 1912 1913 //===--------------------------------------------------------------------===// 1914 // Integer Values 1915 //===--------------------------------------------------------------------===// 1916 1917 /// \brief Make an APSInt of the appropriate width and signedness for the 1918 /// given \p Value and integer \p Type. 1919 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1920 llvm::APSInt Res(getIntWidth(Type), 1921 !Type->isSignedIntegerOrEnumerationType()); 1922 Res = Value; 1923 return Res; 1924 } 1925 1926 bool isSentinelNullExpr(const Expr *E); 1927 1928 /// \brief Get the implementation of the ObjCInterfaceDecl \p D, or NULL if 1929 /// none exists. 1930 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1931 /// \brief Get the implementation of the ObjCCategoryDecl \p D, or NULL if 1932 /// none exists. 1933 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1934 1935 /// \brief Return true if there is at least one \@implementation in the TU. 1936 bool AnyObjCImplementation() { 1937 return !ObjCImpls.empty(); 1938 } 1939 1940 /// \brief Set the implementation of ObjCInterfaceDecl. 1941 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1942 ObjCImplementationDecl *ImplD); 1943 /// \brief Set the implementation of ObjCCategoryDecl. 1944 void setObjCImplementation(ObjCCategoryDecl *CatD, 1945 ObjCCategoryImplDecl *ImplD); 1946 1947 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1948 /// interface, or null if none exists. 1949 const ObjCMethodDecl *getObjCMethodRedeclaration( 1950 const ObjCMethodDecl *MD) const { 1951 return ObjCMethodRedecls.lookup(MD); 1952 } 1953 1954 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1955 const ObjCMethodDecl *Redecl) { 1956 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 1957 ObjCMethodRedecls[MD] = Redecl; 1958 } 1959 1960 /// \brief Returns the Objective-C interface that \p ND belongs to if it is 1961 /// an Objective-C method/property/ivar etc. that is part of an interface, 1962 /// otherwise returns null. 1963 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1964 1965 /// \brief Set the copy inialization expression of a block var decl. 1966 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1967 /// \brief Get the copy initialization expression of the VarDecl \p VD, or 1968 /// NULL if none exists. 1969 Expr *getBlockVarCopyInits(const VarDecl* VD); 1970 1971 /// \brief Allocate an uninitialized TypeSourceInfo. 1972 /// 1973 /// The caller should initialize the memory held by TypeSourceInfo using 1974 /// the TypeLoc wrappers. 1975 /// 1976 /// \param T the type that will be the basis for type source info. This type 1977 /// should refer to how the declarator was written in source code, not to 1978 /// what type semantic analysis resolved the declarator to. 1979 /// 1980 /// \param Size the size of the type info to create, or 0 if the size 1981 /// should be calculated based on the type. 1982 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1983 1984 /// \brief Allocate a TypeSourceInfo where all locations have been 1985 /// initialized to a given location, which defaults to the empty 1986 /// location. 1987 TypeSourceInfo * 1988 getTrivialTypeSourceInfo(QualType T, 1989 SourceLocation Loc = SourceLocation()) const; 1990 1991 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1992 1993 /// \brief Add a deallocation callback that will be invoked when the 1994 /// ASTContext is destroyed. 1995 /// 1996 /// \param Callback A callback function that will be invoked on destruction. 1997 /// 1998 /// \param Data Pointer data that will be provided to the callback function 1999 /// when it is called. 2000 void AddDeallocation(void (*Callback)(void*), void *Data); 2001 2002 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 2003 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 2004 2005 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 2006 /// lazily, only when used; this is only relevant for function or file scoped 2007 /// var definitions. 2008 /// 2009 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 2010 /// it is not used. 2011 bool DeclMustBeEmitted(const Decl *D); 2012 2013 void addUnnamedTag(const TagDecl *Tag); 2014 int getUnnamedTagManglingNumber(const TagDecl *Tag) const; 2015 2016 /// \brief Retrieve the lambda mangling number for a lambda expression. 2017 unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator); 2018 2019 /// \brief Used by ParmVarDecl to store on the side the 2020 /// index of the parameter when it exceeds the size of the normal bitfield. 2021 void setParameterIndex(const ParmVarDecl *D, unsigned index); 2022 2023 /// \brief Used by ParmVarDecl to retrieve on the side the 2024 /// index of the parameter when it exceeds the size of the normal bitfield. 2025 unsigned getParameterIndex(const ParmVarDecl *D) const; 2026 2027 //===--------------------------------------------------------------------===// 2028 // Statistics 2029 //===--------------------------------------------------------------------===// 2030 2031 /// \brief The number of implicitly-declared default constructors. 2032 static unsigned NumImplicitDefaultConstructors; 2033 2034 /// \brief The number of implicitly-declared default constructors for 2035 /// which declarations were built. 2036 static unsigned NumImplicitDefaultConstructorsDeclared; 2037 2038 /// \brief The number of implicitly-declared copy constructors. 2039 static unsigned NumImplicitCopyConstructors; 2040 2041 /// \brief The number of implicitly-declared copy constructors for 2042 /// which declarations were built. 2043 static unsigned NumImplicitCopyConstructorsDeclared; 2044 2045 /// \brief The number of implicitly-declared move constructors. 2046 static unsigned NumImplicitMoveConstructors; 2047 2048 /// \brief The number of implicitly-declared move constructors for 2049 /// which declarations were built. 2050 static unsigned NumImplicitMoveConstructorsDeclared; 2051 2052 /// \brief The number of implicitly-declared copy assignment operators. 2053 static unsigned NumImplicitCopyAssignmentOperators; 2054 2055 /// \brief The number of implicitly-declared copy assignment operators for 2056 /// which declarations were built. 2057 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 2058 2059 /// \brief The number of implicitly-declared move assignment operators. 2060 static unsigned NumImplicitMoveAssignmentOperators; 2061 2062 /// \brief The number of implicitly-declared move assignment operators for 2063 /// which declarations were built. 2064 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 2065 2066 /// \brief The number of implicitly-declared destructors. 2067 static unsigned NumImplicitDestructors; 2068 2069 /// \brief The number of implicitly-declared destructors for which 2070 /// declarations were built. 2071 static unsigned NumImplicitDestructorsDeclared; 2072 2073private: 2074 ASTContext(const ASTContext &) LLVM_DELETED_FUNCTION; 2075 void operator=(const ASTContext &) LLVM_DELETED_FUNCTION; 2076 2077public: 2078 /// \brief Initialize built-in types. 2079 /// 2080 /// This routine may only be invoked once for a given ASTContext object. 2081 /// It is normally invoked by the ASTContext constructor. However, the 2082 /// constructor can be asked to delay initialization, which places the burden 2083 /// of calling this function on the user of that object. 2084 /// 2085 /// \param Target The target 2086 void InitBuiltinTypes(const TargetInfo &Target); 2087 2088private: 2089 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 2090 2091 // Return the Objective-C type encoding for a given type. 2092 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 2093 bool ExpandPointedToStructures, 2094 bool ExpandStructures, 2095 const FieldDecl *Field, 2096 bool OutermostType = false, 2097 bool EncodingProperty = false, 2098 bool StructField = false, 2099 bool EncodeBlockParameters = false, 2100 bool EncodeClassNames = false) const; 2101 2102 // Adds the encoding of the structure's members. 2103 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 2104 const FieldDecl *Field, 2105 bool includeVBases = true) const; 2106 2107 // Adds the encoding of a method parameter or return type. 2108 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 2109 QualType T, std::string& S, 2110 bool Extended) const; 2111 2112 const ASTRecordLayout & 2113 getObjCLayout(const ObjCInterfaceDecl *D, 2114 const ObjCImplementationDecl *Impl) const; 2115 2116private: 2117 /// \brief A set of deallocations that should be performed when the 2118 /// ASTContext is destroyed. 2119 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 2120 2121 // FIXME: This currently contains the set of StoredDeclMaps used 2122 // by DeclContext objects. This probably should not be in ASTContext, 2123 // but we include it here so that ASTContext can quickly deallocate them. 2124 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 2125 2126 /// \brief A counter used to uniquely identify "blocks". 2127 mutable unsigned int UniqueBlockByRefTypeID; 2128 2129 friend class DeclContext; 2130 friend class DeclarationNameTable; 2131 void ReleaseDeclContextMaps(); 2132}; 2133 2134/// \brief Utility function for constructing a nullary selector. 2135static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 2136 IdentifierInfo* II = &Ctx.Idents.get(name); 2137 return Ctx.Selectors.getSelector(0, &II); 2138} 2139 2140/// \brief Utility function for constructing an unary selector. 2141static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 2142 IdentifierInfo* II = &Ctx.Idents.get(name); 2143 return Ctx.Selectors.getSelector(1, &II); 2144} 2145 2146} // end namespace clang 2147 2148// operator new and delete aren't allowed inside namespaces. 2149 2150/// @brief Placement new for using the ASTContext's allocator. 2151/// 2152/// This placement form of operator new uses the ASTContext's allocator for 2153/// obtaining memory. 2154/// 2155/// IMPORTANT: These are also declared in clang/AST/AttrIterator.h! Any changes 2156/// here need to also be made there. 2157/// 2158/// We intentionally avoid using a nothrow specification here so that the calls 2159/// to this operator will not perform a null check on the result -- the 2160/// underlying allocator never returns null pointers. 2161/// 2162/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2163/// @code 2164/// // Default alignment (8) 2165/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 2166/// // Specific alignment 2167/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 2168/// @endcode 2169/// Please note that you cannot use delete on the pointer; it must be 2170/// deallocated using an explicit destructor call followed by 2171/// @c Context.Deallocate(Ptr). 2172/// 2173/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2174/// @param C The ASTContext that provides the allocator. 2175/// @param Alignment The alignment of the allocated memory (if the underlying 2176/// allocator supports it). 2177/// @return The allocated memory. Could be NULL. 2178inline void *operator new(size_t Bytes, const clang::ASTContext &C, 2179 size_t Alignment) { 2180 return C.Allocate(Bytes, Alignment); 2181} 2182/// @brief Placement delete companion to the new above. 2183/// 2184/// This operator is just a companion to the new above. There is no way of 2185/// invoking it directly; see the new operator for more details. This operator 2186/// is called implicitly by the compiler if a placement new expression using 2187/// the ASTContext throws in the object constructor. 2188inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 2189 C.Deallocate(Ptr); 2190} 2191 2192/// This placement form of operator new[] uses the ASTContext's allocator for 2193/// obtaining memory. 2194/// 2195/// We intentionally avoid using a nothrow specification here so that the calls 2196/// to this operator will not perform a null check on the result -- the 2197/// underlying allocator never returns null pointers. 2198/// 2199/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2200/// @code 2201/// // Default alignment (8) 2202/// char *data = new (Context) char[10]; 2203/// // Specific alignment 2204/// char *data = new (Context, 4) char[10]; 2205/// @endcode 2206/// Please note that you cannot use delete on the pointer; it must be 2207/// deallocated using an explicit destructor call followed by 2208/// @c Context.Deallocate(Ptr). 2209/// 2210/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2211/// @param C The ASTContext that provides the allocator. 2212/// @param Alignment The alignment of the allocated memory (if the underlying 2213/// allocator supports it). 2214/// @return The allocated memory. Could be NULL. 2215inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2216 size_t Alignment = 8) { 2217 return C.Allocate(Bytes, Alignment); 2218} 2219 2220/// @brief Placement delete[] companion to the new[] above. 2221/// 2222/// This operator is just a companion to the new[] above. There is no way of 2223/// invoking it directly; see the new[] operator for more details. This operator 2224/// is called implicitly by the compiler if a placement new[] expression using 2225/// the ASTContext throws in the object constructor. 2226inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2227 C.Deallocate(Ptr); 2228} 2229 2230#endif 2231