ASTContext.h revision a6c66cedc022c9e5d45a937d6b8cff491a6bf81b
1//===--- ASTContext.h - Context to hold long-lived AST nodes ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_ASTCONTEXT_H 15#define LLVM_CLANG_AST_ASTCONTEXT_H 16 17#include "clang/Basic/AddressSpaces.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/LangOptions.h" 20#include "clang/Basic/OperatorKinds.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/VersionTuple.h" 23#include "clang/AST/Decl.h" 24#include "clang/AST/LambdaMangleContext.h" 25#include "clang/AST/NestedNameSpecifier.h" 26#include "clang/AST/PrettyPrinter.h" 27#include "clang/AST/TemplateName.h" 28#include "clang/AST/Type.h" 29#include "clang/AST/CanonicalType.h" 30#include "clang/AST/RawCommentList.h" 31#include "llvm/ADT/DenseMap.h" 32#include "llvm/ADT/FoldingSet.h" 33#include "llvm/ADT/IntrusiveRefCntPtr.h" 34#include "llvm/ADT/OwningPtr.h" 35#include "llvm/ADT/SmallPtrSet.h" 36#include "llvm/ADT/TinyPtrVector.h" 37#include "llvm/Support/Allocator.h" 38#include <vector> 39 40namespace llvm { 41 struct fltSemantics; 42} 43 44namespace clang { 45 class FileManager; 46 class ASTRecordLayout; 47 class BlockExpr; 48 class CharUnits; 49 class DiagnosticsEngine; 50 class Expr; 51 class ExternalASTSource; 52 class ASTMutationListener; 53 class IdentifierTable; 54 class SelectorTable; 55 class TargetInfo; 56 class CXXABI; 57 // Decls 58 class DeclContext; 59 class CXXConversionDecl; 60 class CXXMethodDecl; 61 class CXXRecordDecl; 62 class Decl; 63 class FieldDecl; 64 class MangleContext; 65 class ObjCIvarDecl; 66 class ObjCIvarRefExpr; 67 class ObjCPropertyDecl; 68 class ParmVarDecl; 69 class RecordDecl; 70 class StoredDeclsMap; 71 class TagDecl; 72 class TemplateTemplateParmDecl; 73 class TemplateTypeParmDecl; 74 class TranslationUnitDecl; 75 class TypeDecl; 76 class TypedefNameDecl; 77 class UsingDecl; 78 class UsingShadowDecl; 79 class UnresolvedSetIterator; 80 81 namespace Builtin { class Context; } 82 83 namespace comments { 84 class FullComment; 85 } 86 87/// ASTContext - This class holds long-lived AST nodes (such as types and 88/// decls) that can be referred to throughout the semantic analysis of a file. 89class ASTContext : public RefCountedBase<ASTContext> { 90 ASTContext &this_() { return *this; } 91 92 mutable std::vector<Type*> Types; 93 mutable llvm::FoldingSet<ExtQuals> ExtQualNodes; 94 mutable llvm::FoldingSet<ComplexType> ComplexTypes; 95 mutable llvm::FoldingSet<PointerType> PointerTypes; 96 mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes; 97 mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes; 98 mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes; 99 mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes; 100 mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes; 101 mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes; 102 mutable std::vector<VariableArrayType*> VariableArrayTypes; 103 mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes; 104 mutable llvm::FoldingSet<DependentSizedExtVectorType> 105 DependentSizedExtVectorTypes; 106 mutable llvm::FoldingSet<VectorType> VectorTypes; 107 mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes; 108 mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&> 109 FunctionProtoTypes; 110 mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes; 111 mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes; 112 mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes; 113 mutable llvm::FoldingSet<SubstTemplateTypeParmType> 114 SubstTemplateTypeParmTypes; 115 mutable llvm::FoldingSet<SubstTemplateTypeParmPackType> 116 SubstTemplateTypeParmPackTypes; 117 mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&> 118 TemplateSpecializationTypes; 119 mutable llvm::FoldingSet<ParenType> ParenTypes; 120 mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes; 121 mutable llvm::FoldingSet<DependentNameType> DependentNameTypes; 122 mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType, 123 ASTContext&> 124 DependentTemplateSpecializationTypes; 125 llvm::FoldingSet<PackExpansionType> PackExpansionTypes; 126 mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes; 127 mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes; 128 mutable llvm::FoldingSet<AutoType> AutoTypes; 129 mutable llvm::FoldingSet<AtomicType> AtomicTypes; 130 llvm::FoldingSet<AttributedType> AttributedTypes; 131 132 mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames; 133 mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames; 134 mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage> 135 SubstTemplateTemplateParms; 136 mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage, 137 ASTContext&> 138 SubstTemplateTemplateParmPacks; 139 140 /// \brief The set of nested name specifiers. 141 /// 142 /// This set is managed by the NestedNameSpecifier class. 143 mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers; 144 mutable NestedNameSpecifier *GlobalNestedNameSpecifier; 145 friend class NestedNameSpecifier; 146 147 /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts. 148 /// This is lazily created. This is intentionally not serialized. 149 mutable llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> 150 ASTRecordLayouts; 151 mutable llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*> 152 ObjCLayouts; 153 154 /// TypeInfoMap - A cache from types to size and alignment information. 155 typedef llvm::DenseMap<const Type*, 156 std::pair<uint64_t, unsigned> > TypeInfoMap; 157 mutable TypeInfoMap MemoizedTypeInfo; 158 159 /// KeyFunctions - A cache mapping from CXXRecordDecls to key functions. 160 llvm::DenseMap<const CXXRecordDecl*, const CXXMethodDecl*> KeyFunctions; 161 162 /// \brief Mapping from ObjCContainers to their ObjCImplementations. 163 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*> ObjCImpls; 164 165 /// \brief Mapping from ObjCMethod to its duplicate declaration in the same 166 /// interface. 167 llvm::DenseMap<const ObjCMethodDecl*,const ObjCMethodDecl*> ObjCMethodRedecls; 168 169 /// \brief Mapping from __block VarDecls to their copy initialization expr. 170 llvm::DenseMap<const VarDecl*, Expr*> BlockVarCopyInits; 171 172 /// \brief Mapping from class scope functions specialization to their 173 /// template patterns. 174 llvm::DenseMap<const FunctionDecl*, FunctionDecl*> 175 ClassScopeSpecializationPattern; 176 177 /// \brief Representation of a "canonical" template template parameter that 178 /// is used in canonical template names. 179 class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode { 180 TemplateTemplateParmDecl *Parm; 181 182 public: 183 CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm) 184 : Parm(Parm) { } 185 186 TemplateTemplateParmDecl *getParam() const { return Parm; } 187 188 void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); } 189 190 static void Profile(llvm::FoldingSetNodeID &ID, 191 TemplateTemplateParmDecl *Parm); 192 }; 193 mutable llvm::FoldingSet<CanonicalTemplateTemplateParm> 194 CanonTemplateTemplateParms; 195 196 TemplateTemplateParmDecl * 197 getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const; 198 199 /// \brief The typedef for the __int128_t type. 200 mutable TypedefDecl *Int128Decl; 201 202 /// \brief The typedef for the __uint128_t type. 203 mutable TypedefDecl *UInt128Decl; 204 205 /// \brief The typedef for the target specific predefined 206 /// __builtin_va_list type. 207 mutable TypedefDecl *BuiltinVaListDecl; 208 209 /// \brief The typedef for the predefined 'id' type. 210 mutable TypedefDecl *ObjCIdDecl; 211 212 /// \brief The typedef for the predefined 'SEL' type. 213 mutable TypedefDecl *ObjCSelDecl; 214 215 /// \brief The typedef for the predefined 'Class' type. 216 mutable TypedefDecl *ObjCClassDecl; 217 218 /// \brief The typedef for the predefined 'Protocol' class in Objective-C. 219 mutable ObjCInterfaceDecl *ObjCProtocolClassDecl; 220 221 /// \brief The typedef for the predefined 'BOOL' type. 222 mutable TypedefDecl *BOOLDecl; 223 224 // Typedefs which may be provided defining the structure of Objective-C 225 // pseudo-builtins 226 QualType ObjCIdRedefinitionType; 227 QualType ObjCClassRedefinitionType; 228 QualType ObjCSelRedefinitionType; 229 230 QualType ObjCConstantStringType; 231 mutable RecordDecl *CFConstantStringTypeDecl; 232 233 QualType ObjCNSStringType; 234 235 /// \brief The typedef declaration for the Objective-C "instancetype" type. 236 TypedefDecl *ObjCInstanceTypeDecl; 237 238 /// \brief The type for the C FILE type. 239 TypeDecl *FILEDecl; 240 241 /// \brief The type for the C jmp_buf type. 242 TypeDecl *jmp_bufDecl; 243 244 /// \brief The type for the C sigjmp_buf type. 245 TypeDecl *sigjmp_bufDecl; 246 247 /// \brief The type for the C ucontext_t type. 248 TypeDecl *ucontext_tDecl; 249 250 /// \brief Type for the Block descriptor for Blocks CodeGen. 251 /// 252 /// Since this is only used for generation of debug info, it is not 253 /// serialized. 254 mutable RecordDecl *BlockDescriptorType; 255 256 /// \brief Type for the Block descriptor for Blocks CodeGen. 257 /// 258 /// Since this is only used for generation of debug info, it is not 259 /// serialized. 260 mutable RecordDecl *BlockDescriptorExtendedType; 261 262 /// \brief Declaration for the CUDA cudaConfigureCall function. 263 FunctionDecl *cudaConfigureCallDecl; 264 265 TypeSourceInfo NullTypeSourceInfo; 266 267 /// \brief Keeps track of all declaration attributes. 268 /// 269 /// Since so few decls have attrs, we keep them in a hash map instead of 270 /// wasting space in the Decl class. 271 llvm::DenseMap<const Decl*, AttrVec*> DeclAttrs; 272 273 /// \brief Keeps track of the static data member templates from which 274 /// static data members of class template specializations were instantiated. 275 /// 276 /// This data structure stores the mapping from instantiations of static 277 /// data members to the static data member representations within the 278 /// class template from which they were instantiated along with the kind 279 /// of instantiation or specialization (a TemplateSpecializationKind - 1). 280 /// 281 /// Given the following example: 282 /// 283 /// \code 284 /// template<typename T> 285 /// struct X { 286 /// static T value; 287 /// }; 288 /// 289 /// template<typename T> 290 /// T X<T>::value = T(17); 291 /// 292 /// int *x = &X<int>::value; 293 /// \endcode 294 /// 295 /// This mapping will contain an entry that maps from the VarDecl for 296 /// X<int>::value to the corresponding VarDecl for X<T>::value (within the 297 /// class template X) and will be marked TSK_ImplicitInstantiation. 298 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *> 299 InstantiatedFromStaticDataMember; 300 301 /// \brief Keeps track of the declaration from which a UsingDecl was 302 /// created during instantiation. The source declaration is always 303 /// a UsingDecl, an UnresolvedUsingValueDecl, or an 304 /// UnresolvedUsingTypenameDecl. 305 /// 306 /// For example: 307 /// \code 308 /// template<typename T> 309 /// struct A { 310 /// void f(); 311 /// }; 312 /// 313 /// template<typename T> 314 /// struct B : A<T> { 315 /// using A<T>::f; 316 /// }; 317 /// 318 /// template struct B<int>; 319 /// \endcode 320 /// 321 /// This mapping will contain an entry that maps from the UsingDecl in 322 /// B<int> to the UnresolvedUsingDecl in B<T>. 323 llvm::DenseMap<UsingDecl *, NamedDecl *> InstantiatedFromUsingDecl; 324 325 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*> 326 InstantiatedFromUsingShadowDecl; 327 328 llvm::DenseMap<FieldDecl *, FieldDecl *> InstantiatedFromUnnamedFieldDecl; 329 330 /// \brief Mapping that stores the methods overridden by a given C++ 331 /// member function. 332 /// 333 /// Since most C++ member functions aren't virtual and therefore 334 /// don't override anything, we store the overridden functions in 335 /// this map on the side rather than within the CXXMethodDecl structure. 336 typedef llvm::TinyPtrVector<const CXXMethodDecl*> CXXMethodVector; 337 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods; 338 339 /// \brief Mapping from each declaration context to its corresponding lambda 340 /// mangling context. 341 llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts; 342 343 /// \brief Mapping that stores parameterIndex values for ParmVarDecls 344 /// when that value exceeds the bitfield size of 345 /// ParmVarDeclBits.ParameterIndex. 346 typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable; 347 ParameterIndexTable ParamIndices; 348 349 ImportDecl *FirstLocalImport; 350 ImportDecl *LastLocalImport; 351 352 TranslationUnitDecl *TUDecl; 353 354 /// SourceMgr - The associated SourceManager object. 355 SourceManager &SourceMgr; 356 357 /// LangOpts - The language options used to create the AST associated with 358 /// this ASTContext object. 359 LangOptions &LangOpts; 360 361 /// \brief The allocator used to create AST objects. 362 /// 363 /// AST objects are never destructed; rather, all memory associated with the 364 /// AST objects will be released when the ASTContext itself is destroyed. 365 mutable llvm::BumpPtrAllocator BumpAlloc; 366 367 /// \brief Allocator for partial diagnostics. 368 PartialDiagnostic::StorageAllocator DiagAllocator; 369 370 /// \brief The current C++ ABI. 371 OwningPtr<CXXABI> ABI; 372 CXXABI *createCXXABI(const TargetInfo &T); 373 374 /// \brief The logical -> physical address space map. 375 const LangAS::Map *AddrSpaceMap; 376 377 friend class ASTDeclReader; 378 friend class ASTReader; 379 friend class ASTWriter; 380 friend class CXXRecordDecl; 381 382 const TargetInfo *Target; 383 clang::PrintingPolicy PrintingPolicy; 384 385public: 386 IdentifierTable &Idents; 387 SelectorTable &Selectors; 388 Builtin::Context &BuiltinInfo; 389 mutable DeclarationNameTable DeclarationNames; 390 OwningPtr<ExternalASTSource> ExternalSource; 391 ASTMutationListener *Listener; 392 393 clang::PrintingPolicy getPrintingPolicy() const { return PrintingPolicy; } 394 395 void setPrintingPolicy(clang::PrintingPolicy Policy) { 396 PrintingPolicy = Policy; 397 } 398 399 SourceManager& getSourceManager() { return SourceMgr; } 400 const SourceManager& getSourceManager() const { return SourceMgr; } 401 402 llvm::BumpPtrAllocator &getAllocator() const { 403 return BumpAlloc; 404 } 405 406 void *Allocate(unsigned Size, unsigned Align = 8) const { 407 return BumpAlloc.Allocate(Size, Align); 408 } 409 void Deallocate(void *Ptr) const { } 410 411 /// Return the total amount of physical memory allocated for representing 412 /// AST nodes and type information. 413 size_t getASTAllocatedMemory() const { 414 return BumpAlloc.getTotalMemory(); 415 } 416 /// Return the total memory used for various side tables. 417 size_t getSideTableAllocatedMemory() const; 418 419 PartialDiagnostic::StorageAllocator &getDiagAllocator() { 420 return DiagAllocator; 421 } 422 423 const TargetInfo &getTargetInfo() const { return *Target; } 424 425 const LangOptions& getLangOpts() const { return LangOpts; } 426 427 DiagnosticsEngine &getDiagnostics() const; 428 429 FullSourceLoc getFullLoc(SourceLocation Loc) const { 430 return FullSourceLoc(Loc,SourceMgr); 431 } 432 433 /// \brief All comments in this translation unit. 434 RawCommentList Comments; 435 436 /// \brief True if comments are already loaded from ExternalASTSource. 437 mutable bool CommentsLoaded; 438 439 class RawCommentAndCacheFlags { 440 public: 441 enum Kind { 442 /// We searched for a comment attached to the particular declaration, but 443 /// didn't find any. 444 /// 445 /// getRaw() == 0. 446 NoCommentInDecl = 0, 447 448 /// We have found a comment attached to this particular declaration. 449 /// 450 /// getRaw() != 0. 451 FromDecl, 452 453 /// This declaration does not have an attached comment, and we have 454 /// searched the redeclaration chain. 455 /// 456 /// If getRaw() == 0, the whole redeclaration chain does not have any 457 /// comments. 458 /// 459 /// If getRaw() != 0, it is a comment propagated from other 460 /// redeclaration. 461 FromRedecl 462 }; 463 464 Kind getKind() const LLVM_READONLY { 465 return Data.getInt(); 466 } 467 468 void setKind(Kind K) { 469 Data.setInt(K); 470 } 471 472 const RawComment *getRaw() const LLVM_READONLY { 473 return Data.getPointer(); 474 } 475 476 void setRaw(const RawComment *RC) { 477 Data.setPointer(RC); 478 } 479 480 const Decl *getOriginalDecl() const LLVM_READONLY { 481 return OriginalDecl; 482 } 483 484 void setOriginalDecl(const Decl *Orig) { 485 OriginalDecl = Orig; 486 } 487 488 private: 489 llvm::PointerIntPair<const RawComment *, 2, Kind> Data; 490 const Decl *OriginalDecl; 491 }; 492 493 /// \brief Mapping from declarations to comments attached to any 494 /// redeclaration. 495 /// 496 /// Raw comments are owned by Comments list. This mapping is populated 497 /// lazily. 498 mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments; 499 500 /// \brief Mapping from declarations to parsed comments attached to any 501 /// redeclaration. 502 mutable llvm::DenseMap<const Decl *, comments::FullComment *> ParsedComments; 503 504 /// \brief Return the documentation comment attached to a given declaration, 505 /// without looking into cache. 506 RawComment *getRawCommentForDeclNoCache(const Decl *D) const; 507 508public: 509 RawCommentList &getRawCommentList() { 510 return Comments; 511 } 512 513 void addComment(const RawComment &RC) { 514 Comments.addComment(RC, BumpAlloc); 515 } 516 517 /// \brief Return the documentation comment attached to a given declaration. 518 /// Returns NULL if no comment is attached. 519 /// 520 /// \param OriginalDecl if not NULL, is set to declaration AST node that had 521 /// the comment, if the comment we found comes from a redeclaration. 522 const RawComment *getRawCommentForAnyRedecl( 523 const Decl *D, 524 const Decl **OriginalDecl = NULL) const; 525 526 /// Return parsed documentation comment attached to a given declaration. 527 /// Returns NULL if no comment is attached. 528 comments::FullComment *getCommentForDecl(const Decl *D) const; 529 530 /// \brief Retrieve the attributes for the given declaration. 531 AttrVec& getDeclAttrs(const Decl *D); 532 533 /// \brief Erase the attributes corresponding to the given declaration. 534 void eraseDeclAttrs(const Decl *D); 535 536 /// \brief If this variable is an instantiated static data member of a 537 /// class template specialization, returns the templated static data member 538 /// from which it was instantiated. 539 MemberSpecializationInfo *getInstantiatedFromStaticDataMember( 540 const VarDecl *Var); 541 542 FunctionDecl *getClassScopeSpecializationPattern(const FunctionDecl *FD); 543 544 void setClassScopeSpecializationPattern(FunctionDecl *FD, 545 FunctionDecl *Pattern); 546 547 /// \brief Note that the static data member \p Inst is an instantiation of 548 /// the static data member template \p Tmpl of a class template. 549 void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 550 TemplateSpecializationKind TSK, 551 SourceLocation PointOfInstantiation = SourceLocation()); 552 553 /// \brief If the given using decl is an instantiation of a 554 /// (possibly unresolved) using decl from a template instantiation, 555 /// return it. 556 NamedDecl *getInstantiatedFromUsingDecl(UsingDecl *Inst); 557 558 /// \brief Remember that the using decl \p Inst is an instantiation 559 /// of the using decl \p Pattern of a class template. 560 void setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern); 561 562 void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 563 UsingShadowDecl *Pattern); 564 UsingShadowDecl *getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst); 565 566 FieldDecl *getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field); 567 568 void setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, FieldDecl *Tmpl); 569 570 /// ZeroBitfieldFollowsNonBitfield - return 'true" if 'FD' is a zero-length 571 /// bitfield which follows the non-bitfield 'LastFD'. 572 bool ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 573 const FieldDecl *LastFD) const; 574 575 /// ZeroBitfieldFollowsBitfield - return 'true" if 'FD' is a zero-length 576 /// bitfield which follows the bitfield 'LastFD'. 577 bool ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 578 const FieldDecl *LastFD) const; 579 580 /// BitfieldFollowsBitfield - return 'true" if 'FD' is a 581 /// bitfield which follows the bitfield 'LastFD'. 582 bool BitfieldFollowsBitfield(const FieldDecl *FD, 583 const FieldDecl *LastFD) const; 584 585 /// NonBitfieldFollowsBitfield - return 'true" if 'FD' is not a 586 /// bitfield which follows the bitfield 'LastFD'. 587 bool NonBitfieldFollowsBitfield(const FieldDecl *FD, 588 const FieldDecl *LastFD) const; 589 590 /// BitfieldFollowsNonBitfield - return 'true" if 'FD' is a 591 /// bitfield which follows the none bitfield 'LastFD'. 592 bool BitfieldFollowsNonBitfield(const FieldDecl *FD, 593 const FieldDecl *LastFD) const; 594 595 // Access to the set of methods overridden by the given C++ method. 596 typedef CXXMethodVector::const_iterator overridden_cxx_method_iterator; 597 overridden_cxx_method_iterator 598 overridden_methods_begin(const CXXMethodDecl *Method) const; 599 600 overridden_cxx_method_iterator 601 overridden_methods_end(const CXXMethodDecl *Method) const; 602 603 unsigned overridden_methods_size(const CXXMethodDecl *Method) const; 604 605 /// \brief Note that the given C++ \p Method overrides the given \p 606 /// Overridden method. 607 void addOverriddenMethod(const CXXMethodDecl *Method, 608 const CXXMethodDecl *Overridden); 609 610 /// \brief Notify the AST context that a new import declaration has been 611 /// parsed or implicitly created within this translation unit. 612 void addedLocalImportDecl(ImportDecl *Import); 613 614 static ImportDecl *getNextLocalImport(ImportDecl *Import) { 615 return Import->NextLocalImport; 616 } 617 618 /// \brief Iterator that visits import declarations. 619 class import_iterator { 620 ImportDecl *Import; 621 622 public: 623 typedef ImportDecl *value_type; 624 typedef ImportDecl *reference; 625 typedef ImportDecl *pointer; 626 typedef int difference_type; 627 typedef std::forward_iterator_tag iterator_category; 628 629 import_iterator() : Import() { } 630 explicit import_iterator(ImportDecl *Import) : Import(Import) { } 631 632 reference operator*() const { return Import; } 633 pointer operator->() const { return Import; } 634 635 import_iterator &operator++() { 636 Import = ASTContext::getNextLocalImport(Import); 637 return *this; 638 } 639 640 import_iterator operator++(int) { 641 import_iterator Other(*this); 642 ++(*this); 643 return Other; 644 } 645 646 friend bool operator==(import_iterator X, import_iterator Y) { 647 return X.Import == Y.Import; 648 } 649 650 friend bool operator!=(import_iterator X, import_iterator Y) { 651 return X.Import != Y.Import; 652 } 653 }; 654 655 import_iterator local_import_begin() const { 656 return import_iterator(FirstLocalImport); 657 } 658 import_iterator local_import_end() const { return import_iterator(); } 659 660 TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; } 661 662 663 // Builtin Types. 664 CanQualType VoidTy; 665 CanQualType BoolTy; 666 CanQualType CharTy; 667 CanQualType WCharTy; // [C++ 3.9.1p5], integer type in C99. 668 CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions. 669 CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99. 670 CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99. 671 CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty; 672 CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy; 673 CanQualType UnsignedLongLongTy, UnsignedInt128Ty; 674 CanQualType FloatTy, DoubleTy, LongDoubleTy; 675 CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON 676 CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy; 677 CanQualType VoidPtrTy, NullPtrTy; 678 CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy; 679 CanQualType BuiltinFnTy; 680 CanQualType PseudoObjectTy, ARCUnbridgedCastTy; 681 CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy; 682 CanQualType ObjCBuiltinBoolTy; 683 684 // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand. 685 mutable QualType AutoDeductTy; // Deduction against 'auto'. 686 mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'. 687 688 // Type used to help define __builtin_va_list for some targets. 689 // The type is built when constructing 'BuiltinVaListDecl'. 690 mutable QualType VaListTagTy; 691 692 ASTContext(LangOptions& LOpts, SourceManager &SM, const TargetInfo *t, 693 IdentifierTable &idents, SelectorTable &sels, 694 Builtin::Context &builtins, 695 unsigned size_reserve, 696 bool DelayInitialization = false); 697 698 ~ASTContext(); 699 700 /// \brief Attach an external AST source to the AST context. 701 /// 702 /// The external AST source provides the ability to load parts of 703 /// the abstract syntax tree as needed from some external storage, 704 /// e.g., a precompiled header. 705 void setExternalSource(OwningPtr<ExternalASTSource> &Source); 706 707 /// \brief Retrieve a pointer to the external AST source associated 708 /// with this AST context, if any. 709 ExternalASTSource *getExternalSource() const { return ExternalSource.get(); } 710 711 /// \brief Attach an AST mutation listener to the AST context. 712 /// 713 /// The AST mutation listener provides the ability to track modifications to 714 /// the abstract syntax tree entities committed after they were initially 715 /// created. 716 void setASTMutationListener(ASTMutationListener *Listener) { 717 this->Listener = Listener; 718 } 719 720 /// \brief Retrieve a pointer to the AST mutation listener associated 721 /// with this AST context, if any. 722 ASTMutationListener *getASTMutationListener() const { return Listener; } 723 724 void PrintStats() const; 725 const std::vector<Type*>& getTypes() const { return Types; } 726 727 /// \brief Retrieve the declaration for the 128-bit signed integer type. 728 TypedefDecl *getInt128Decl() const; 729 730 /// \brief Retrieve the declaration for the 128-bit unsigned integer type. 731 TypedefDecl *getUInt128Decl() const; 732 733 //===--------------------------------------------------------------------===// 734 // Type Constructors 735 //===--------------------------------------------------------------------===// 736 737private: 738 /// getExtQualType - Return a type with extended qualifiers. 739 QualType getExtQualType(const Type *Base, Qualifiers Quals) const; 740 741 QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const; 742 743public: 744 /// getAddSpaceQualType - Return the uniqued reference to the type for an 745 /// address space qualified type with the specified type and address space. 746 /// The resulting type has a union of the qualifiers from T and the address 747 /// space. If T already has an address space specifier, it is silently 748 /// replaced. 749 QualType getAddrSpaceQualType(QualType T, unsigned AddressSpace) const; 750 751 /// getObjCGCQualType - Returns the uniqued reference to the type for an 752 /// objc gc qualified type. The retulting type has a union of the qualifiers 753 /// from T and the gc attribute. 754 QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const; 755 756 /// getRestrictType - Returns the uniqued reference to the type for a 757 /// 'restrict' qualified type. The resulting type has a union of the 758 /// qualifiers from T and 'restrict'. 759 QualType getRestrictType(QualType T) const { 760 return T.withFastQualifiers(Qualifiers::Restrict); 761 } 762 763 /// getVolatileType - Returns the uniqued reference to the type for a 764 /// 'volatile' qualified type. The resulting type has a union of the 765 /// qualifiers from T and 'volatile'. 766 QualType getVolatileType(QualType T) const { 767 return T.withFastQualifiers(Qualifiers::Volatile); 768 } 769 770 /// getConstType - Returns the uniqued reference to the type for a 771 /// 'const' qualified type. The resulting type has a union of the 772 /// qualifiers from T and 'const'. 773 /// 774 /// It can be reasonably expected that this will always be 775 /// equivalent to calling T.withConst(). 776 QualType getConstType(QualType T) const { return T.withConst(); } 777 778 /// adjustFunctionType - Change the ExtInfo on a function type. 779 const FunctionType *adjustFunctionType(const FunctionType *Fn, 780 FunctionType::ExtInfo EInfo); 781 782 /// getComplexType - Return the uniqued reference to the type for a complex 783 /// number with the specified element type. 784 QualType getComplexType(QualType T) const; 785 CanQualType getComplexType(CanQualType T) const { 786 return CanQualType::CreateUnsafe(getComplexType((QualType) T)); 787 } 788 789 /// getPointerType - Return the uniqued reference to the type for a pointer to 790 /// the specified type. 791 QualType getPointerType(QualType T) const; 792 CanQualType getPointerType(CanQualType T) const { 793 return CanQualType::CreateUnsafe(getPointerType((QualType) T)); 794 } 795 796 /// getAtomicType - Return the uniqued reference to the atomic type for 797 /// the specified type. 798 QualType getAtomicType(QualType T) const; 799 800 /// getBlockPointerType - Return the uniqued reference to the type for a block 801 /// of the specified type. 802 QualType getBlockPointerType(QualType T) const; 803 804 /// This gets the struct used to keep track of the descriptor for pointer to 805 /// blocks. 806 QualType getBlockDescriptorType() const; 807 808 /// This gets the struct used to keep track of the extended descriptor for 809 /// pointer to blocks. 810 QualType getBlockDescriptorExtendedType() const; 811 812 void setcudaConfigureCallDecl(FunctionDecl *FD) { 813 cudaConfigureCallDecl = FD; 814 } 815 FunctionDecl *getcudaConfigureCallDecl() { 816 return cudaConfigureCallDecl; 817 } 818 819 /// This builds the struct used for __block variables. 820 QualType BuildByRefType(StringRef DeclName, QualType Ty) const; 821 822 /// Returns true iff we need copy/dispose helpers for the given type. 823 bool BlockRequiresCopying(QualType Ty) const; 824 825 /// getLValueReferenceType - Return the uniqued reference to the type for an 826 /// lvalue reference to the specified type. 827 QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true) 828 const; 829 830 /// getRValueReferenceType - Return the uniqued reference to the type for an 831 /// rvalue reference to the specified type. 832 QualType getRValueReferenceType(QualType T) const; 833 834 /// getMemberPointerType - Return the uniqued reference to the type for a 835 /// member pointer to the specified type in the specified class. The class 836 /// is a Type because it could be a dependent name. 837 QualType getMemberPointerType(QualType T, const Type *Cls) const; 838 839 /// getVariableArrayType - Returns a non-unique reference to the type for a 840 /// variable array of the specified element type. 841 QualType getVariableArrayType(QualType EltTy, Expr *NumElts, 842 ArrayType::ArraySizeModifier ASM, 843 unsigned IndexTypeQuals, 844 SourceRange Brackets) const; 845 846 /// getDependentSizedArrayType - Returns a non-unique reference to 847 /// the type for a dependently-sized array of the specified element 848 /// type. FIXME: We will need these to be uniqued, or at least 849 /// comparable, at some point. 850 QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 851 ArrayType::ArraySizeModifier ASM, 852 unsigned IndexTypeQuals, 853 SourceRange Brackets) const; 854 855 /// getIncompleteArrayType - Returns a unique reference to the type for a 856 /// incomplete array of the specified element type. 857 QualType getIncompleteArrayType(QualType EltTy, 858 ArrayType::ArraySizeModifier ASM, 859 unsigned IndexTypeQuals) const; 860 861 /// getConstantArrayType - Return the unique reference to the type for a 862 /// constant array of the specified element type. 863 QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, 864 ArrayType::ArraySizeModifier ASM, 865 unsigned IndexTypeQuals) const; 866 867 /// getVariableArrayDecayedType - Returns a vla type where known sizes 868 /// are replaced with [*]. 869 QualType getVariableArrayDecayedType(QualType Ty) const; 870 871 /// getVectorType - Return the unique reference to a vector type of 872 /// the specified element type and size. VectorType must be a built-in type. 873 QualType getVectorType(QualType VectorType, unsigned NumElts, 874 VectorType::VectorKind VecKind) const; 875 876 /// getExtVectorType - Return the unique reference to an extended vector type 877 /// of the specified element type and size. VectorType must be a built-in 878 /// type. 879 QualType getExtVectorType(QualType VectorType, unsigned NumElts) const; 880 881 /// getDependentSizedExtVectorType - Returns a non-unique reference to 882 /// the type for a dependently-sized vector of the specified element 883 /// type. FIXME: We will need these to be uniqued, or at least 884 /// comparable, at some point. 885 QualType getDependentSizedExtVectorType(QualType VectorType, 886 Expr *SizeExpr, 887 SourceLocation AttrLoc) const; 888 889 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 890 /// 891 QualType getFunctionNoProtoType(QualType ResultTy, 892 const FunctionType::ExtInfo &Info) const; 893 894 QualType getFunctionNoProtoType(QualType ResultTy) const { 895 return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo()); 896 } 897 898 /// getFunctionType - Return a normal function type with a typed 899 /// argument list. 900 QualType getFunctionType(QualType ResultTy, 901 const QualType *Args, unsigned NumArgs, 902 const FunctionProtoType::ExtProtoInfo &EPI) const; 903 904 /// getTypeDeclType - Return the unique reference to the type for 905 /// the specified type declaration. 906 QualType getTypeDeclType(const TypeDecl *Decl, 907 const TypeDecl *PrevDecl = 0) const { 908 assert(Decl && "Passed null for Decl param"); 909 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 910 911 if (PrevDecl) { 912 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 913 Decl->TypeForDecl = PrevDecl->TypeForDecl; 914 return QualType(PrevDecl->TypeForDecl, 0); 915 } 916 917 return getTypeDeclTypeSlow(Decl); 918 } 919 920 /// getTypedefType - Return the unique reference to the type for the 921 /// specified typedef-name decl. 922 QualType getTypedefType(const TypedefNameDecl *Decl, 923 QualType Canon = QualType()) const; 924 925 QualType getRecordType(const RecordDecl *Decl) const; 926 927 QualType getEnumType(const EnumDecl *Decl) const; 928 929 QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const; 930 931 QualType getAttributedType(AttributedType::Kind attrKind, 932 QualType modifiedType, 933 QualType equivalentType); 934 935 QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced, 936 QualType Replacement) const; 937 QualType getSubstTemplateTypeParmPackType( 938 const TemplateTypeParmType *Replaced, 939 const TemplateArgument &ArgPack); 940 941 QualType getTemplateTypeParmType(unsigned Depth, unsigned Index, 942 bool ParameterPack, 943 TemplateTypeParmDecl *ParmDecl = 0) const; 944 945 QualType getTemplateSpecializationType(TemplateName T, 946 const TemplateArgument *Args, 947 unsigned NumArgs, 948 QualType Canon = QualType()) const; 949 950 QualType getCanonicalTemplateSpecializationType(TemplateName T, 951 const TemplateArgument *Args, 952 unsigned NumArgs) const; 953 954 QualType getTemplateSpecializationType(TemplateName T, 955 const TemplateArgumentListInfo &Args, 956 QualType Canon = QualType()) const; 957 958 TypeSourceInfo * 959 getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc, 960 const TemplateArgumentListInfo &Args, 961 QualType Canon = QualType()) const; 962 963 QualType getParenType(QualType NamedType) const; 964 965 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 966 NestedNameSpecifier *NNS, 967 QualType NamedType) const; 968 QualType getDependentNameType(ElaboratedTypeKeyword Keyword, 969 NestedNameSpecifier *NNS, 970 const IdentifierInfo *Name, 971 QualType Canon = QualType()) const; 972 973 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 974 NestedNameSpecifier *NNS, 975 const IdentifierInfo *Name, 976 const TemplateArgumentListInfo &Args) const; 977 QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 978 NestedNameSpecifier *NNS, 979 const IdentifierInfo *Name, 980 unsigned NumArgs, 981 const TemplateArgument *Args) const; 982 983 QualType getPackExpansionType(QualType Pattern, 984 llvm::Optional<unsigned> NumExpansions); 985 986 QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 987 ObjCInterfaceDecl *PrevDecl = 0) const; 988 989 QualType getObjCObjectType(QualType Base, 990 ObjCProtocolDecl * const *Protocols, 991 unsigned NumProtocols) const; 992 993 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type 994 /// for the given ObjCObjectType. 995 QualType getObjCObjectPointerType(QualType OIT) const; 996 997 /// getTypeOfType - GCC extension. 998 QualType getTypeOfExprType(Expr *e) const; 999 QualType getTypeOfType(QualType t) const; 1000 1001 /// getDecltypeType - C++0x decltype. 1002 QualType getDecltypeType(Expr *e, QualType UnderlyingType) const; 1003 1004 /// getUnaryTransformType - unary type transforms 1005 QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType, 1006 UnaryTransformType::UTTKind UKind) const; 1007 1008 /// getAutoType - C++0x deduced auto type. 1009 QualType getAutoType(QualType DeducedType) const; 1010 1011 /// getAutoDeductType - C++0x deduction pattern for 'auto' type. 1012 QualType getAutoDeductType() const; 1013 1014 /// getAutoRRefDeductType - C++0x deduction pattern for 'auto &&' type. 1015 QualType getAutoRRefDeductType() const; 1016 1017 /// getTagDeclType - Return the unique reference to the type for the 1018 /// specified TagDecl (struct/union/class/enum) decl. 1019 QualType getTagDeclType(const TagDecl *Decl) const; 1020 1021 /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined 1022 /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4). 1023 CanQualType getSizeType() const; 1024 1025 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5), 1026 /// defined in <stdint.h>. 1027 CanQualType getIntMaxType() const; 1028 1029 /// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5), 1030 /// defined in <stdint.h>. 1031 CanQualType getUIntMaxType() const; 1032 1033 /// getWCharType - In C++, this returns the unique wchar_t type. In C99, this 1034 /// returns a type compatible with the type defined in <stddef.h> as defined 1035 /// by the target. 1036 QualType getWCharType() const { return WCharTy; } 1037 1038 /// getSignedWCharType - Return the type of "signed wchar_t". 1039 /// Used when in C++, as a GCC extension. 1040 QualType getSignedWCharType() const; 1041 1042 /// getUnsignedWCharType - Return the type of "unsigned wchar_t". 1043 /// Used when in C++, as a GCC extension. 1044 QualType getUnsignedWCharType() const; 1045 1046 /// getWIntType - In C99, this returns a type compatible with the type 1047 /// defined in <stddef.h> as defined by the target. 1048 QualType getWIntType() const { return WIntTy; } 1049 1050 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 1051 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1052 QualType getPointerDiffType() const; 1053 1054 // getCFConstantStringType - Return the C structure type used to represent 1055 // constant CFStrings. 1056 QualType getCFConstantStringType() const; 1057 1058 /// Get the structure type used to representation CFStrings, or NULL 1059 /// if it hasn't yet been built. 1060 QualType getRawCFConstantStringType() const { 1061 if (CFConstantStringTypeDecl) 1062 return getTagDeclType(CFConstantStringTypeDecl); 1063 return QualType(); 1064 } 1065 void setCFConstantStringType(QualType T); 1066 1067 // This setter/getter represents the ObjC type for an NSConstantString. 1068 void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl); 1069 QualType getObjCConstantStringInterface() const { 1070 return ObjCConstantStringType; 1071 } 1072 1073 QualType getObjCNSStringType() const { 1074 return ObjCNSStringType; 1075 } 1076 1077 void setObjCNSStringType(QualType T) { 1078 ObjCNSStringType = T; 1079 } 1080 1081 /// \brief Retrieve the type that 'id' has been defined to, which may be 1082 /// different from the built-in 'id' if 'id' has been typedef'd. 1083 QualType getObjCIdRedefinitionType() const { 1084 if (ObjCIdRedefinitionType.isNull()) 1085 return getObjCIdType(); 1086 return ObjCIdRedefinitionType; 1087 } 1088 1089 /// \brief Set the user-written type that redefines 'id'. 1090 void setObjCIdRedefinitionType(QualType RedefType) { 1091 ObjCIdRedefinitionType = RedefType; 1092 } 1093 1094 /// \brief Retrieve the type that 'Class' has been defined to, which may be 1095 /// different from the built-in 'Class' if 'Class' has been typedef'd. 1096 QualType getObjCClassRedefinitionType() const { 1097 if (ObjCClassRedefinitionType.isNull()) 1098 return getObjCClassType(); 1099 return ObjCClassRedefinitionType; 1100 } 1101 1102 /// \brief Set the user-written type that redefines 'SEL'. 1103 void setObjCClassRedefinitionType(QualType RedefType) { 1104 ObjCClassRedefinitionType = RedefType; 1105 } 1106 1107 /// \brief Retrieve the type that 'SEL' has been defined to, which may be 1108 /// different from the built-in 'SEL' if 'SEL' has been typedef'd. 1109 QualType getObjCSelRedefinitionType() const { 1110 if (ObjCSelRedefinitionType.isNull()) 1111 return getObjCSelType(); 1112 return ObjCSelRedefinitionType; 1113 } 1114 1115 1116 /// \brief Set the user-written type that redefines 'SEL'. 1117 void setObjCSelRedefinitionType(QualType RedefType) { 1118 ObjCSelRedefinitionType = RedefType; 1119 } 1120 1121 /// \brief Retrieve the Objective-C "instancetype" type, if already known; 1122 /// otherwise, returns a NULL type; 1123 QualType getObjCInstanceType() { 1124 return getTypeDeclType(getObjCInstanceTypeDecl()); 1125 } 1126 1127 /// \brief Retrieve the typedef declaration corresponding to the Objective-C 1128 /// "instancetype" type. 1129 TypedefDecl *getObjCInstanceTypeDecl(); 1130 1131 /// \brief Set the type for the C FILE type. 1132 void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; } 1133 1134 /// \brief Retrieve the C FILE type. 1135 QualType getFILEType() const { 1136 if (FILEDecl) 1137 return getTypeDeclType(FILEDecl); 1138 return QualType(); 1139 } 1140 1141 /// \brief Set the type for the C jmp_buf type. 1142 void setjmp_bufDecl(TypeDecl *jmp_bufDecl) { 1143 this->jmp_bufDecl = jmp_bufDecl; 1144 } 1145 1146 /// \brief Retrieve the C jmp_buf type. 1147 QualType getjmp_bufType() const { 1148 if (jmp_bufDecl) 1149 return getTypeDeclType(jmp_bufDecl); 1150 return QualType(); 1151 } 1152 1153 /// \brief Set the type for the C sigjmp_buf type. 1154 void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) { 1155 this->sigjmp_bufDecl = sigjmp_bufDecl; 1156 } 1157 1158 /// \brief Retrieve the C sigjmp_buf type. 1159 QualType getsigjmp_bufType() const { 1160 if (sigjmp_bufDecl) 1161 return getTypeDeclType(sigjmp_bufDecl); 1162 return QualType(); 1163 } 1164 1165 /// \brief Set the type for the C ucontext_t type. 1166 void setucontext_tDecl(TypeDecl *ucontext_tDecl) { 1167 this->ucontext_tDecl = ucontext_tDecl; 1168 } 1169 1170 /// \brief Retrieve the C ucontext_t type. 1171 QualType getucontext_tType() const { 1172 if (ucontext_tDecl) 1173 return getTypeDeclType(ucontext_tDecl); 1174 return QualType(); 1175 } 1176 1177 /// \brief The result type of logical operations, '<', '>', '!=', etc. 1178 QualType getLogicalOperationType() const { 1179 return getLangOpts().CPlusPlus ? BoolTy : IntTy; 1180 } 1181 1182 /// getObjCEncodingForType - Emit the ObjC type encoding for the 1183 /// given type into \arg S. If \arg NameFields is specified then 1184 /// record field names are also encoded. 1185 void getObjCEncodingForType(QualType t, std::string &S, 1186 const FieldDecl *Field=0) const; 1187 1188 void getLegacyIntegralTypeEncoding(QualType &t) const; 1189 1190 // Put the string version of type qualifiers into S. 1191 void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 1192 std::string &S) const; 1193 1194 /// getObjCEncodingForFunctionDecl - Returns the encoded type for this 1195 /// function. This is in the same format as Objective-C method encodings. 1196 /// 1197 /// \returns true if an error occurred (e.g., because one of the parameter 1198 /// types is incomplete), false otherwise. 1199 bool getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, std::string& S); 1200 1201 /// getObjCEncodingForMethodDecl - Return the encoded type for this method 1202 /// declaration. 1203 /// 1204 /// \returns true if an error occurred (e.g., because one of the parameter 1205 /// types is incomplete), false otherwise. 1206 bool getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S, 1207 bool Extended = false) 1208 const; 1209 1210 /// getObjCEncodingForBlock - Return the encoded type for this block 1211 /// declaration. 1212 std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const; 1213 1214 /// getObjCEncodingForPropertyDecl - Return the encoded type for 1215 /// this method declaration. If non-NULL, Container must be either 1216 /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should 1217 /// only be NULL when getting encodings for protocol properties. 1218 void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1219 const Decl *Container, 1220 std::string &S) const; 1221 1222 bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 1223 ObjCProtocolDecl *rProto) const; 1224 1225 /// getObjCEncodingTypeSize returns size of type for objective-c encoding 1226 /// purpose in characters. 1227 CharUnits getObjCEncodingTypeSize(QualType t) const; 1228 1229 /// \brief Retrieve the typedef corresponding to the predefined 'id' type 1230 /// in Objective-C. 1231 TypedefDecl *getObjCIdDecl() const; 1232 1233 /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by 1234 /// Sema. id is always a (typedef for a) pointer type, a pointer to a struct. 1235 QualType getObjCIdType() const { 1236 return getTypeDeclType(getObjCIdDecl()); 1237 } 1238 1239 /// \brief Retrieve the typedef corresponding to the predefined 'SEL' type 1240 /// in Objective-C. 1241 TypedefDecl *getObjCSelDecl() const; 1242 1243 /// \brief Retrieve the type that corresponds to the predefined Objective-C 1244 /// 'SEL' type. 1245 QualType getObjCSelType() const { 1246 return getTypeDeclType(getObjCSelDecl()); 1247 } 1248 1249 /// \brief Retrieve the typedef declaration corresponding to the predefined 1250 /// Objective-C 'Class' type. 1251 TypedefDecl *getObjCClassDecl() const; 1252 1253 /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by 1254 /// Sema. 'Class' is always a (typedef for a) pointer type, a pointer to a 1255 /// struct. 1256 QualType getObjCClassType() const { 1257 return getTypeDeclType(getObjCClassDecl()); 1258 } 1259 1260 /// \brief Retrieve the Objective-C class declaration corresponding to 1261 /// the predefined 'Protocol' class. 1262 ObjCInterfaceDecl *getObjCProtocolDecl() const; 1263 1264 /// \brief Retrieve declaration of 'BOOL' typedef 1265 TypedefDecl *getBOOLDecl() const { 1266 return BOOLDecl; 1267 } 1268 1269 /// \brief Save declaration of 'BOOL' typedef 1270 void setBOOLDecl(TypedefDecl *TD) { 1271 BOOLDecl = TD; 1272 } 1273 1274 /// \brief type of 'BOOL' type. 1275 QualType getBOOLType() const { 1276 return getTypeDeclType(getBOOLDecl()); 1277 } 1278 1279 /// \brief Retrieve the type of the Objective-C "Protocol" class. 1280 QualType getObjCProtoType() const { 1281 return getObjCInterfaceType(getObjCProtocolDecl()); 1282 } 1283 1284 /// \brief Retrieve the C type declaration corresponding to the predefined 1285 /// __builtin_va_list type. 1286 TypedefDecl *getBuiltinVaListDecl() const; 1287 1288 /// \brief Retrieve the type of the __builtin_va_list type. 1289 QualType getBuiltinVaListType() const { 1290 return getTypeDeclType(getBuiltinVaListDecl()); 1291 } 1292 1293 /// \brief Retrieve the C type declaration corresponding to the predefined 1294 /// __va_list_tag type used to help define the __builtin_va_list type for 1295 /// some targets. 1296 QualType getVaListTagType() const; 1297 1298 /// getCVRQualifiedType - Returns a type with additional const, 1299 /// volatile, or restrict qualifiers. 1300 QualType getCVRQualifiedType(QualType T, unsigned CVR) const { 1301 return getQualifiedType(T, Qualifiers::fromCVRMask(CVR)); 1302 } 1303 1304 /// getQualifiedType - Un-split a SplitQualType. 1305 QualType getQualifiedType(SplitQualType split) const { 1306 return getQualifiedType(split.Ty, split.Quals); 1307 } 1308 1309 /// getQualifiedType - Returns a type with additional qualifiers. 1310 QualType getQualifiedType(QualType T, Qualifiers Qs) const { 1311 if (!Qs.hasNonFastQualifiers()) 1312 return T.withFastQualifiers(Qs.getFastQualifiers()); 1313 QualifierCollector Qc(Qs); 1314 const Type *Ptr = Qc.strip(T); 1315 return getExtQualType(Ptr, Qc); 1316 } 1317 1318 /// getQualifiedType - Returns a type with additional qualifiers. 1319 QualType getQualifiedType(const Type *T, Qualifiers Qs) const { 1320 if (!Qs.hasNonFastQualifiers()) 1321 return QualType(T, Qs.getFastQualifiers()); 1322 return getExtQualType(T, Qs); 1323 } 1324 1325 /// getLifetimeQualifiedType - Returns a type with the given 1326 /// lifetime qualifier. 1327 QualType getLifetimeQualifiedType(QualType type, 1328 Qualifiers::ObjCLifetime lifetime) { 1329 assert(type.getObjCLifetime() == Qualifiers::OCL_None); 1330 assert(lifetime != Qualifiers::OCL_None); 1331 1332 Qualifiers qs; 1333 qs.addObjCLifetime(lifetime); 1334 return getQualifiedType(type, qs); 1335 } 1336 1337 DeclarationNameInfo getNameForTemplate(TemplateName Name, 1338 SourceLocation NameLoc) const; 1339 1340 TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin, 1341 UnresolvedSetIterator End) const; 1342 1343 TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS, 1344 bool TemplateKeyword, 1345 TemplateDecl *Template) const; 1346 1347 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1348 const IdentifierInfo *Name) const; 1349 TemplateName getDependentTemplateName(NestedNameSpecifier *NNS, 1350 OverloadedOperatorKind Operator) const; 1351 TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 1352 TemplateName replacement) const; 1353 TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 1354 const TemplateArgument &ArgPack) const; 1355 1356 enum GetBuiltinTypeError { 1357 GE_None, ///< No error 1358 GE_Missing_stdio, ///< Missing a type from <stdio.h> 1359 GE_Missing_setjmp, ///< Missing a type from <setjmp.h> 1360 GE_Missing_ucontext ///< Missing a type from <ucontext.h> 1361 }; 1362 1363 /// GetBuiltinType - Return the type for the specified builtin. If 1364 /// IntegerConstantArgs is non-null, it is filled in with a bitmask of 1365 /// arguments to the builtin that are required to be integer constant 1366 /// expressions. 1367 QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error, 1368 unsigned *IntegerConstantArgs = 0) const; 1369 1370private: 1371 CanQualType getFromTargetType(unsigned Type) const; 1372 std::pair<uint64_t, unsigned> getTypeInfoImpl(const Type *T) const; 1373 1374 //===--------------------------------------------------------------------===// 1375 // Type Predicates. 1376 //===--------------------------------------------------------------------===// 1377 1378public: 1379 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 1380 /// garbage collection attribute. 1381 /// 1382 Qualifiers::GC getObjCGCAttrKind(QualType Ty) const; 1383 1384 /// areCompatibleVectorTypes - Return true if the given vector types 1385 /// are of the same unqualified type or if they are equivalent to the same 1386 /// GCC vector type, ignoring whether they are target-specific (AltiVec or 1387 /// Neon) types. 1388 bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec); 1389 1390 /// isObjCNSObjectType - Return true if this is an NSObject object with 1391 /// its NSObject attribute set. 1392 static bool isObjCNSObjectType(QualType Ty) { 1393 return Ty->isObjCNSObjectType(); 1394 } 1395 1396 //===--------------------------------------------------------------------===// 1397 // Type Sizing and Analysis 1398 //===--------------------------------------------------------------------===// 1399 1400 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1401 /// scalar floating point type. 1402 const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const; 1403 1404 /// getTypeInfo - Get the size and alignment of the specified complete type in 1405 /// bits. 1406 std::pair<uint64_t, unsigned> getTypeInfo(const Type *T) const; 1407 std::pair<uint64_t, unsigned> getTypeInfo(QualType T) const { 1408 return getTypeInfo(T.getTypePtr()); 1409 } 1410 1411 /// getTypeSize - Return the size of the specified type, in bits. This method 1412 /// does not work on incomplete types. 1413 uint64_t getTypeSize(QualType T) const { 1414 return getTypeInfo(T).first; 1415 } 1416 uint64_t getTypeSize(const Type *T) const { 1417 return getTypeInfo(T).first; 1418 } 1419 1420 /// getCharWidth - Return the size of the character type, in bits 1421 uint64_t getCharWidth() const { 1422 return getTypeSize(CharTy); 1423 } 1424 1425 /// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1426 CharUnits toCharUnitsFromBits(int64_t BitSize) const; 1427 1428 /// toBits - Convert a size in characters to a size in bits. 1429 int64_t toBits(CharUnits CharSize) const; 1430 1431 /// getTypeSizeInChars - Return the size of the specified type, in characters. 1432 /// This method does not work on incomplete types. 1433 CharUnits getTypeSizeInChars(QualType T) const; 1434 CharUnits getTypeSizeInChars(const Type *T) const; 1435 1436 /// getTypeAlign - Return the ABI-specified alignment of a type, in bits. 1437 /// This method does not work on incomplete types. 1438 unsigned getTypeAlign(QualType T) const { 1439 return getTypeInfo(T).second; 1440 } 1441 unsigned getTypeAlign(const Type *T) const { 1442 return getTypeInfo(T).second; 1443 } 1444 1445 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1446 /// characters. This method does not work on incomplete types. 1447 CharUnits getTypeAlignInChars(QualType T) const; 1448 CharUnits getTypeAlignInChars(const Type *T) const; 1449 1450 // getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the 1451 // type is a record, its data size is returned. 1452 std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const; 1453 1454 std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const; 1455 std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const; 1456 1457 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1458 /// type for the current target in bits. This can be different than the ABI 1459 /// alignment in cases where it is beneficial for performance to overalign 1460 /// a data type. 1461 unsigned getPreferredTypeAlign(const Type *T) const; 1462 1463 /// getDeclAlign - Return a conservative estimate of the alignment of 1464 /// the specified decl. Note that bitfields do not have a valid alignment, so 1465 /// this method will assert on them. 1466 /// If @p RefAsPointee, references are treated like their underlying type 1467 /// (for alignof), else they're treated like pointers (for CodeGen). 1468 CharUnits getDeclAlign(const Decl *D, bool RefAsPointee = false) const; 1469 1470 /// getASTRecordLayout - Get or compute information about the layout of the 1471 /// specified record (struct/union/class), which indicates its size and field 1472 /// position information. 1473 const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const; 1474 1475 /// getASTObjCInterfaceLayout - Get or compute information about the 1476 /// layout of the specified Objective-C interface. 1477 const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) 1478 const; 1479 1480 void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS, 1481 bool Simple = false) const; 1482 1483 /// getASTObjCImplementationLayout - Get or compute information about 1484 /// the layout of the specified Objective-C implementation. This may 1485 /// differ from the interface if synthesized ivars are present. 1486 const ASTRecordLayout & 1487 getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const; 1488 1489 /// getKeyFunction - Get the key function for the given record decl, or NULL 1490 /// if there isn't one. The key function is, according to the Itanium C++ ABI 1491 /// section 5.2.3: 1492 /// 1493 /// ...the first non-pure virtual function that is not inline at the point 1494 /// of class definition. 1495 const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD); 1496 1497 /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits. 1498 uint64_t getFieldOffset(const ValueDecl *FD) const; 1499 1500 bool isNearlyEmpty(const CXXRecordDecl *RD) const; 1501 1502 MangleContext *createMangleContext(); 1503 1504 void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass, 1505 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const; 1506 1507 unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const; 1508 void CollectInheritedProtocols(const Decl *CDecl, 1509 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols); 1510 1511 //===--------------------------------------------------------------------===// 1512 // Type Operators 1513 //===--------------------------------------------------------------------===// 1514 1515 /// getCanonicalType - Return the canonical (structural) type corresponding to 1516 /// the specified potentially non-canonical type. The non-canonical version 1517 /// of a type may have many "decorated" versions of types. Decorators can 1518 /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1519 /// to be free of any of these, allowing two canonical types to be compared 1520 /// for exact equality with a simple pointer comparison. 1521 CanQualType getCanonicalType(QualType T) const { 1522 return CanQualType::CreateUnsafe(T.getCanonicalType()); 1523 } 1524 1525 const Type *getCanonicalType(const Type *T) const { 1526 return T->getCanonicalTypeInternal().getTypePtr(); 1527 } 1528 1529 /// getCanonicalParamType - Return the canonical parameter type 1530 /// corresponding to the specific potentially non-canonical one. 1531 /// Qualifiers are stripped off, functions are turned into function 1532 /// pointers, and arrays decay one level into pointers. 1533 CanQualType getCanonicalParamType(QualType T) const; 1534 1535 /// \brief Determine whether the given types are equivalent. 1536 bool hasSameType(QualType T1, QualType T2) const { 1537 return getCanonicalType(T1) == getCanonicalType(T2); 1538 } 1539 1540 /// \brief Returns this type as a completely-unqualified array type, 1541 /// capturing the qualifiers in Quals. This will remove the minimal amount of 1542 /// sugaring from the types, similar to the behavior of 1543 /// QualType::getUnqualifiedType(). 1544 /// 1545 /// \param T is the qualified type, which may be an ArrayType 1546 /// 1547 /// \param Quals will receive the full set of qualifiers that were 1548 /// applied to the array. 1549 /// 1550 /// \returns if this is an array type, the completely unqualified array type 1551 /// that corresponds to it. Otherwise, returns T.getUnqualifiedType(). 1552 QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals); 1553 1554 /// \brief Determine whether the given types are equivalent after 1555 /// cvr-qualifiers have been removed. 1556 bool hasSameUnqualifiedType(QualType T1, QualType T2) const { 1557 return getCanonicalType(T1).getTypePtr() == 1558 getCanonicalType(T2).getTypePtr(); 1559 } 1560 1561 bool UnwrapSimilarPointerTypes(QualType &T1, QualType &T2); 1562 1563 /// \brief Retrieves the "canonical" nested name specifier for a 1564 /// given nested name specifier. 1565 /// 1566 /// The canonical nested name specifier is a nested name specifier 1567 /// that uniquely identifies a type or namespace within the type 1568 /// system. For example, given: 1569 /// 1570 /// \code 1571 /// namespace N { 1572 /// struct S { 1573 /// template<typename T> struct X { typename T* type; }; 1574 /// }; 1575 /// } 1576 /// 1577 /// template<typename T> struct Y { 1578 /// typename N::S::X<T>::type member; 1579 /// }; 1580 /// \endcode 1581 /// 1582 /// Here, the nested-name-specifier for N::S::X<T>:: will be 1583 /// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined 1584 /// by declarations in the type system and the canonical type for 1585 /// the template type parameter 'T' is template-param-0-0. 1586 NestedNameSpecifier * 1587 getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const; 1588 1589 /// \brief Retrieves the default calling convention to use for 1590 /// C++ instance methods. 1591 CallingConv getDefaultCXXMethodCallConv(bool isVariadic); 1592 1593 /// \brief Retrieves the canonical representation of the given 1594 /// calling convention. 1595 CallingConv getCanonicalCallConv(CallingConv CC) const; 1596 1597 /// \brief Determines whether two calling conventions name the same 1598 /// calling convention. 1599 bool isSameCallConv(CallingConv lcc, CallingConv rcc) { 1600 return (getCanonicalCallConv(lcc) == getCanonicalCallConv(rcc)); 1601 } 1602 1603 /// \brief Retrieves the "canonical" template name that refers to a 1604 /// given template. 1605 /// 1606 /// The canonical template name is the simplest expression that can 1607 /// be used to refer to a given template. For most templates, this 1608 /// expression is just the template declaration itself. For example, 1609 /// the template std::vector can be referred to via a variety of 1610 /// names---std::vector, \::std::vector, vector (if vector is in 1611 /// scope), etc.---but all of these names map down to the same 1612 /// TemplateDecl, which is used to form the canonical template name. 1613 /// 1614 /// Dependent template names are more interesting. Here, the 1615 /// template name could be something like T::template apply or 1616 /// std::allocator<T>::template rebind, where the nested name 1617 /// specifier itself is dependent. In this case, the canonical 1618 /// template name uses the shortest form of the dependent 1619 /// nested-name-specifier, which itself contains all canonical 1620 /// types, values, and templates. 1621 TemplateName getCanonicalTemplateName(TemplateName Name) const; 1622 1623 /// \brief Determine whether the given template names refer to the same 1624 /// template. 1625 bool hasSameTemplateName(TemplateName X, TemplateName Y); 1626 1627 /// \brief Retrieve the "canonical" template argument. 1628 /// 1629 /// The canonical template argument is the simplest template argument 1630 /// (which may be a type, value, expression, or declaration) that 1631 /// expresses the value of the argument. 1632 TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg) 1633 const; 1634 1635 /// Type Query functions. If the type is an instance of the specified class, 1636 /// return the Type pointer for the underlying maximally pretty type. This 1637 /// is a member of ASTContext because this may need to do some amount of 1638 /// canonicalization, e.g. to move type qualifiers into the element type. 1639 const ArrayType *getAsArrayType(QualType T) const; 1640 const ConstantArrayType *getAsConstantArrayType(QualType T) const { 1641 return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T)); 1642 } 1643 const VariableArrayType *getAsVariableArrayType(QualType T) const { 1644 return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T)); 1645 } 1646 const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const { 1647 return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T)); 1648 } 1649 const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T) 1650 const { 1651 return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T)); 1652 } 1653 1654 /// getBaseElementType - Returns the innermost element type of an array type. 1655 /// For example, will return "int" for int[m][n] 1656 QualType getBaseElementType(const ArrayType *VAT) const; 1657 1658 /// getBaseElementType - Returns the innermost element type of a type 1659 /// (which needn't actually be an array type). 1660 QualType getBaseElementType(QualType QT) const; 1661 1662 /// getConstantArrayElementCount - Returns number of constant array elements. 1663 uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const; 1664 1665 /// \brief Perform adjustment on the parameter type of a function. 1666 /// 1667 /// This routine adjusts the given parameter type @p T to the actual 1668 /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 1669 /// C++ [dcl.fct]p3). The adjusted parameter type is returned. 1670 QualType getAdjustedParameterType(QualType T) const; 1671 1672 /// \brief Retrieve the parameter type as adjusted for use in the signature 1673 /// of a function, decaying array and function types and removing top-level 1674 /// cv-qualifiers. 1675 QualType getSignatureParameterType(QualType T) const; 1676 1677 /// getArrayDecayedType - Return the properly qualified result of decaying the 1678 /// specified array type to a pointer. This operation is non-trivial when 1679 /// handling typedefs etc. The canonical type of "T" must be an array type, 1680 /// this returns a pointer to a properly qualified element of the array. 1681 /// 1682 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1683 QualType getArrayDecayedType(QualType T) const; 1684 1685 /// getPromotedIntegerType - Returns the type that Promotable will 1686 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 1687 /// integer type. 1688 QualType getPromotedIntegerType(QualType PromotableType) const; 1689 1690 /// \brief Recurses in pointer/array types until it finds an objc retainable 1691 /// type and returns its ownership. 1692 Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const; 1693 1694 /// \brief Whether this is a promotable bitfield reference according 1695 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 1696 /// 1697 /// \returns the type this bit-field will promote to, or NULL if no 1698 /// promotion occurs. 1699 QualType isPromotableBitField(Expr *E) const; 1700 1701 /// getIntegerTypeOrder - Returns the highest ranked integer type: 1702 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1703 /// LHS < RHS, return -1. 1704 int getIntegerTypeOrder(QualType LHS, QualType RHS) const; 1705 1706 /// getFloatingTypeOrder - Compare the rank of the two specified floating 1707 /// point types, ignoring the domain of the type (i.e. 'double' == 1708 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1709 /// LHS < RHS, return -1. 1710 int getFloatingTypeOrder(QualType LHS, QualType RHS) const; 1711 1712 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1713 /// point or a complex type (based on typeDomain/typeSize). 1714 /// 'typeDomain' is a real floating point or complex type. 1715 /// 'typeSize' is a real floating point or complex type. 1716 QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize, 1717 QualType typeDomain) const; 1718 1719 unsigned getTargetAddressSpace(QualType T) const { 1720 return getTargetAddressSpace(T.getQualifiers()); 1721 } 1722 1723 unsigned getTargetAddressSpace(Qualifiers Q) const { 1724 return getTargetAddressSpace(Q.getAddressSpace()); 1725 } 1726 1727 unsigned getTargetAddressSpace(unsigned AS) const { 1728 if (AS < LangAS::Offset || AS >= LangAS::Offset + LangAS::Count) 1729 return AS; 1730 else 1731 return (*AddrSpaceMap)[AS - LangAS::Offset]; 1732 } 1733 1734private: 1735 // Helper for integer ordering 1736 unsigned getIntegerRank(const Type *T) const; 1737 1738public: 1739 1740 //===--------------------------------------------------------------------===// 1741 // Type Compatibility Predicates 1742 //===--------------------------------------------------------------------===// 1743 1744 /// Compatibility predicates used to check assignment expressions. 1745 bool typesAreCompatible(QualType T1, QualType T2, 1746 bool CompareUnqualified = false); // C99 6.2.7p1 1747 1748 bool propertyTypesAreCompatible(QualType, QualType); 1749 bool typesAreBlockPointerCompatible(QualType, QualType); 1750 1751 bool isObjCIdType(QualType T) const { 1752 return T == getObjCIdType(); 1753 } 1754 bool isObjCClassType(QualType T) const { 1755 return T == getObjCClassType(); 1756 } 1757 bool isObjCSelType(QualType T) const { 1758 return T == getObjCSelType(); 1759 } 1760 bool QualifiedIdConformsQualifiedId(QualType LHS, QualType RHS); 1761 bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS, 1762 bool ForCompare); 1763 1764 bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS); 1765 1766 // Check the safety of assignment from LHS to RHS 1767 bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 1768 const ObjCObjectPointerType *RHSOPT); 1769 bool canAssignObjCInterfaces(const ObjCObjectType *LHS, 1770 const ObjCObjectType *RHS); 1771 bool canAssignObjCInterfacesInBlockPointer( 1772 const ObjCObjectPointerType *LHSOPT, 1773 const ObjCObjectPointerType *RHSOPT, 1774 bool BlockReturnType); 1775 bool areComparableObjCPointerTypes(QualType LHS, QualType RHS); 1776 QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT, 1777 const ObjCObjectPointerType *RHSOPT); 1778 bool canBindObjCObjectType(QualType To, QualType From); 1779 1780 // Functions for calculating composite types 1781 QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false, 1782 bool Unqualified = false, bool BlockReturnType = false); 1783 QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false, 1784 bool Unqualified = false); 1785 QualType mergeFunctionArgumentTypes(QualType, QualType, 1786 bool OfBlockPointer=false, 1787 bool Unqualified = false); 1788 QualType mergeTransparentUnionType(QualType, QualType, 1789 bool OfBlockPointer=false, 1790 bool Unqualified = false); 1791 1792 QualType mergeObjCGCQualifiers(QualType, QualType); 1793 1794 bool FunctionTypesMatchOnNSConsumedAttrs( 1795 const FunctionProtoType *FromFunctionType, 1796 const FunctionProtoType *ToFunctionType); 1797 1798 void ResetObjCLayout(const ObjCContainerDecl *CD) { 1799 ObjCLayouts[CD] = 0; 1800 } 1801 1802 //===--------------------------------------------------------------------===// 1803 // Integer Predicates 1804 //===--------------------------------------------------------------------===// 1805 1806 // The width of an integer, as defined in C99 6.2.6.2. This is the number 1807 // of bits in an integer type excluding any padding bits. 1808 unsigned getIntWidth(QualType T) const; 1809 1810 // Per C99 6.2.5p6, for every signed integer type, there is a corresponding 1811 // unsigned integer type. This method takes a signed type, and returns the 1812 // corresponding unsigned integer type. 1813 QualType getCorrespondingUnsignedType(QualType T); 1814 1815 //===--------------------------------------------------------------------===// 1816 // Type Iterators. 1817 //===--------------------------------------------------------------------===// 1818 1819 typedef std::vector<Type*>::iterator type_iterator; 1820 typedef std::vector<Type*>::const_iterator const_type_iterator; 1821 1822 type_iterator types_begin() { return Types.begin(); } 1823 type_iterator types_end() { return Types.end(); } 1824 const_type_iterator types_begin() const { return Types.begin(); } 1825 const_type_iterator types_end() const { return Types.end(); } 1826 1827 //===--------------------------------------------------------------------===// 1828 // Integer Values 1829 //===--------------------------------------------------------------------===// 1830 1831 /// MakeIntValue - Make an APSInt of the appropriate width and 1832 /// signedness for the given \arg Value and integer \arg Type. 1833 llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const { 1834 llvm::APSInt Res(getIntWidth(Type), 1835 !Type->isSignedIntegerOrEnumerationType()); 1836 Res = Value; 1837 return Res; 1838 } 1839 1840 bool isSentinelNullExpr(const Expr *E); 1841 1842 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1843 ObjCImplementationDecl *getObjCImplementation(ObjCInterfaceDecl *D); 1844 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1845 ObjCCategoryImplDecl *getObjCImplementation(ObjCCategoryDecl *D); 1846 1847 /// \brief returns true if there is at least one \@implementation in TU. 1848 bool AnyObjCImplementation() { 1849 return !ObjCImpls.empty(); 1850 } 1851 1852 /// \brief Set the implementation of ObjCInterfaceDecl. 1853 void setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1854 ObjCImplementationDecl *ImplD); 1855 /// \brief Set the implementation of ObjCCategoryDecl. 1856 void setObjCImplementation(ObjCCategoryDecl *CatD, 1857 ObjCCategoryImplDecl *ImplD); 1858 1859 /// \brief Get the duplicate declaration of a ObjCMethod in the same 1860 /// interface, or null if non exists. 1861 const ObjCMethodDecl *getObjCMethodRedeclaration( 1862 const ObjCMethodDecl *MD) const { 1863 return ObjCMethodRedecls.lookup(MD); 1864 } 1865 1866 void setObjCMethodRedeclaration(const ObjCMethodDecl *MD, 1867 const ObjCMethodDecl *Redecl) { 1868 assert(!getObjCMethodRedeclaration(MD) && "MD already has a redeclaration"); 1869 ObjCMethodRedecls[MD] = Redecl; 1870 } 1871 1872 /// \brief Returns the objc interface that \arg ND belongs to if it is a 1873 /// objc method/property/ivar etc. that is part of an interface, 1874 /// otherwise returns null. 1875 ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const; 1876 1877 /// \brief Set the copy inialization expression of a block var decl. 1878 void setBlockVarCopyInits(VarDecl*VD, Expr* Init); 1879 /// \brief Get the copy initialization expression of VarDecl,or NULL if 1880 /// none exists. 1881 Expr *getBlockVarCopyInits(const VarDecl*VD); 1882 1883 /// \brief Allocate an uninitialized TypeSourceInfo. 1884 /// 1885 /// The caller should initialize the memory held by TypeSourceInfo using 1886 /// the TypeLoc wrappers. 1887 /// 1888 /// \param T the type that will be the basis for type source info. This type 1889 /// should refer to how the declarator was written in source code, not to 1890 /// what type semantic analysis resolved the declarator to. 1891 /// 1892 /// \param Size the size of the type info to create, or 0 if the size 1893 /// should be calculated based on the type. 1894 TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const; 1895 1896 /// \brief Allocate a TypeSourceInfo where all locations have been 1897 /// initialized to a given location, which defaults to the empty 1898 /// location. 1899 TypeSourceInfo * 1900 getTrivialTypeSourceInfo(QualType T, 1901 SourceLocation Loc = SourceLocation()) const; 1902 1903 TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; } 1904 1905 /// \brief Add a deallocation callback that will be invoked when the 1906 /// ASTContext is destroyed. 1907 /// 1908 /// \param Callback A callback function that will be invoked on destruction. 1909 /// 1910 /// \param Data Pointer data that will be provided to the callback function 1911 /// when it is called. 1912 void AddDeallocation(void (*Callback)(void*), void *Data); 1913 1914 GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD); 1915 GVALinkage GetGVALinkageForVariable(const VarDecl *VD); 1916 1917 /// \brief Determines if the decl can be CodeGen'ed or deserialized from PCH 1918 /// lazily, only when used; this is only relevant for function or file scoped 1919 /// var definitions. 1920 /// 1921 /// \returns true if the function/var must be CodeGen'ed/deserialized even if 1922 /// it is not used. 1923 bool DeclMustBeEmitted(const Decl *D); 1924 1925 /// \brief Retrieve the lambda mangling number for a lambda expression. 1926 unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator); 1927 1928 /// \brief Used by ParmVarDecl to store on the side the 1929 /// index of the parameter when it exceeds the size of the normal bitfield. 1930 void setParameterIndex(const ParmVarDecl *D, unsigned index); 1931 1932 /// \brief Used by ParmVarDecl to retrieve on the side the 1933 /// index of the parameter when it exceeds the size of the normal bitfield. 1934 unsigned getParameterIndex(const ParmVarDecl *D) const; 1935 1936 //===--------------------------------------------------------------------===// 1937 // Statistics 1938 //===--------------------------------------------------------------------===// 1939 1940 /// \brief The number of implicitly-declared default constructors. 1941 static unsigned NumImplicitDefaultConstructors; 1942 1943 /// \brief The number of implicitly-declared default constructors for 1944 /// which declarations were built. 1945 static unsigned NumImplicitDefaultConstructorsDeclared; 1946 1947 /// \brief The number of implicitly-declared copy constructors. 1948 static unsigned NumImplicitCopyConstructors; 1949 1950 /// \brief The number of implicitly-declared copy constructors for 1951 /// which declarations were built. 1952 static unsigned NumImplicitCopyConstructorsDeclared; 1953 1954 /// \brief The number of implicitly-declared move constructors. 1955 static unsigned NumImplicitMoveConstructors; 1956 1957 /// \brief The number of implicitly-declared move constructors for 1958 /// which declarations were built. 1959 static unsigned NumImplicitMoveConstructorsDeclared; 1960 1961 /// \brief The number of implicitly-declared copy assignment operators. 1962 static unsigned NumImplicitCopyAssignmentOperators; 1963 1964 /// \brief The number of implicitly-declared copy assignment operators for 1965 /// which declarations were built. 1966 static unsigned NumImplicitCopyAssignmentOperatorsDeclared; 1967 1968 /// \brief The number of implicitly-declared move assignment operators. 1969 static unsigned NumImplicitMoveAssignmentOperators; 1970 1971 /// \brief The number of implicitly-declared move assignment operators for 1972 /// which declarations were built. 1973 static unsigned NumImplicitMoveAssignmentOperatorsDeclared; 1974 1975 /// \brief The number of implicitly-declared destructors. 1976 static unsigned NumImplicitDestructors; 1977 1978 /// \brief The number of implicitly-declared destructors for which 1979 /// declarations were built. 1980 static unsigned NumImplicitDestructorsDeclared; 1981 1982private: 1983 ASTContext(const ASTContext&); // DO NOT IMPLEMENT 1984 void operator=(const ASTContext&); // DO NOT IMPLEMENT 1985 1986public: 1987 /// \brief Initialize built-in types. 1988 /// 1989 /// This routine may only be invoked once for a given ASTContext object. 1990 /// It is normally invoked by the ASTContext constructor. However, the 1991 /// constructor can be asked to delay initialization, which places the burden 1992 /// of calling this function on the user of that object. 1993 /// 1994 /// \param Target The target 1995 void InitBuiltinTypes(const TargetInfo &Target); 1996 1997private: 1998 void InitBuiltinType(CanQualType &R, BuiltinType::Kind K); 1999 2000 // Return the ObjC type encoding for a given type. 2001 void getObjCEncodingForTypeImpl(QualType t, std::string &S, 2002 bool ExpandPointedToStructures, 2003 bool ExpandStructures, 2004 const FieldDecl *Field, 2005 bool OutermostType = false, 2006 bool EncodingProperty = false, 2007 bool StructField = false, 2008 bool EncodeBlockParameters = false, 2009 bool EncodeClassNames = false) const; 2010 2011 // Adds the encoding of the structure's members. 2012 void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S, 2013 const FieldDecl *Field, 2014 bool includeVBases = true) const; 2015 2016 // Adds the encoding of a method parameter or return type. 2017 void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 2018 QualType T, std::string& S, 2019 bool Extended) const; 2020 2021 const ASTRecordLayout & 2022 getObjCLayout(const ObjCInterfaceDecl *D, 2023 const ObjCImplementationDecl *Impl) const; 2024 2025private: 2026 /// \brief A set of deallocations that should be performed when the 2027 /// ASTContext is destroyed. 2028 SmallVector<std::pair<void (*)(void*), void *>, 16> Deallocations; 2029 2030 // FIXME: This currently contains the set of StoredDeclMaps used 2031 // by DeclContext objects. This probably should not be in ASTContext, 2032 // but we include it here so that ASTContext can quickly deallocate them. 2033 llvm::PointerIntPair<StoredDeclsMap*,1> LastSDM; 2034 2035 /// \brief A counter used to uniquely identify "blocks". 2036 mutable unsigned int UniqueBlockByRefTypeID; 2037 2038 friend class DeclContext; 2039 friend class DeclarationNameTable; 2040 void ReleaseDeclContextMaps(); 2041}; 2042 2043/// @brief Utility function for constructing a nullary selector. 2044static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) { 2045 IdentifierInfo* II = &Ctx.Idents.get(name); 2046 return Ctx.Selectors.getSelector(0, &II); 2047} 2048 2049/// @brief Utility function for constructing an unary selector. 2050static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) { 2051 IdentifierInfo* II = &Ctx.Idents.get(name); 2052 return Ctx.Selectors.getSelector(1, &II); 2053} 2054 2055} // end namespace clang 2056 2057// operator new and delete aren't allowed inside namespaces. 2058 2059/// @brief Placement new for using the ASTContext's allocator. 2060/// 2061/// This placement form of operator new uses the ASTContext's allocator for 2062/// obtaining memory. 2063/// 2064/// IMPORTANT: These are also declared in clang/AST/Attr.h! Any changes here 2065/// need to also be made there. 2066/// 2067/// We intentionally avoid using a nothrow specification here so that the calls 2068/// to this operator will not perform a null check on the result -- the 2069/// underlying allocator never returns null pointers. 2070/// 2071/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2072/// @code 2073/// // Default alignment (8) 2074/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); 2075/// // Specific alignment 2076/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); 2077/// @endcode 2078/// Please note that you cannot use delete on the pointer; it must be 2079/// deallocated using an explicit destructor call followed by 2080/// @c Context.Deallocate(Ptr). 2081/// 2082/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2083/// @param C The ASTContext that provides the allocator. 2084/// @param Alignment The alignment of the allocated memory (if the underlying 2085/// allocator supports it). 2086/// @return The allocated memory. Could be NULL. 2087inline void *operator new(size_t Bytes, const clang::ASTContext &C, 2088 size_t Alignment) { 2089 return C.Allocate(Bytes, Alignment); 2090} 2091/// @brief Placement delete companion to the new above. 2092/// 2093/// This operator is just a companion to the new above. There is no way of 2094/// invoking it directly; see the new operator for more details. This operator 2095/// is called implicitly by the compiler if a placement new expression using 2096/// the ASTContext throws in the object constructor. 2097inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) { 2098 C.Deallocate(Ptr); 2099} 2100 2101/// This placement form of operator new[] uses the ASTContext's allocator for 2102/// obtaining memory. 2103/// 2104/// We intentionally avoid using a nothrow specification here so that the calls 2105/// to this operator will not perform a null check on the result -- the 2106/// underlying allocator never returns null pointers. 2107/// 2108/// Usage looks like this (assuming there's an ASTContext 'Context' in scope): 2109/// @code 2110/// // Default alignment (8) 2111/// char *data = new (Context) char[10]; 2112/// // Specific alignment 2113/// char *data = new (Context, 4) char[10]; 2114/// @endcode 2115/// Please note that you cannot use delete on the pointer; it must be 2116/// deallocated using an explicit destructor call followed by 2117/// @c Context.Deallocate(Ptr). 2118/// 2119/// @param Bytes The number of bytes to allocate. Calculated by the compiler. 2120/// @param C The ASTContext that provides the allocator. 2121/// @param Alignment The alignment of the allocated memory (if the underlying 2122/// allocator supports it). 2123/// @return The allocated memory. Could be NULL. 2124inline void *operator new[](size_t Bytes, const clang::ASTContext& C, 2125 size_t Alignment = 8) { 2126 return C.Allocate(Bytes, Alignment); 2127} 2128 2129/// @brief Placement delete[] companion to the new[] above. 2130/// 2131/// This operator is just a companion to the new[] above. There is no way of 2132/// invoking it directly; see the new[] operator for more details. This operator 2133/// is called implicitly by the compiler if a placement new[] expression using 2134/// the ASTContext throws in the object constructor. 2135inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) { 2136 C.Deallocate(Ptr); 2137} 2138 2139#endif 2140