DeclBase.h revision 0a0d2b179085a52c10402feebeb6db8b4d96a140
1//===-- DeclBase.h - Base Classes for representing declarations -*- 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 Decl and DeclContext interfaces. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_DECLBASE_H 15#define LLVM_CLANG_AST_DECLBASE_H 16 17#include "clang/AST/Attr.h" 18#include "clang/AST/Type.h" 19#include "clang/Basic/Specifiers.h" 20#include "llvm/Support/PrettyStackTrace.h" 21#include "llvm/ADT/PointerUnion.h" 22 23namespace clang { 24class DeclContext; 25class TranslationUnitDecl; 26class NamespaceDecl; 27class UsingDirectiveDecl; 28class NamedDecl; 29class FunctionDecl; 30class CXXRecordDecl; 31class EnumDecl; 32class ObjCMethodDecl; 33class ObjCContainerDecl; 34class ObjCInterfaceDecl; 35class ObjCCategoryDecl; 36class ObjCProtocolDecl; 37class ObjCImplementationDecl; 38class ObjCCategoryImplDecl; 39class ObjCImplDecl; 40class LinkageSpecDecl; 41class BlockDecl; 42class DeclarationName; 43class CompoundStmt; 44class StoredDeclsMap; 45class DependentDiagnostic; 46class ASTMutationListener; 47} 48 49namespace llvm { 50// DeclContext* is only 4-byte aligned on 32-bit systems. 51template<> 52 class PointerLikeTypeTraits<clang::DeclContext*> { 53 typedef clang::DeclContext* PT; 54public: 55 static inline void *getAsVoidPointer(PT P) { return P; } 56 static inline PT getFromVoidPointer(void *P) { 57 return static_cast<PT>(P); 58 } 59 enum { NumLowBitsAvailable = 2 }; 60}; 61} 62 63namespace clang { 64 65 /// \brief Captures the result of checking the availability of a 66 /// declaration. 67 enum AvailabilityResult { 68 AR_Available = 0, 69 AR_NotYetIntroduced, 70 AR_Deprecated, 71 AR_Unavailable 72 }; 73 74/// Decl - This represents one declaration (or definition), e.g. a variable, 75/// typedef, function, struct, etc. 76/// 77class Decl { 78public: 79 /// \brief Lists the kind of concrete classes of Decl. 80 enum Kind { 81#define DECL(DERIVED, BASE) DERIVED, 82#define ABSTRACT_DECL(DECL) 83#define DECL_RANGE(BASE, START, END) \ 84 first##BASE = START, last##BASE = END, 85#define LAST_DECL_RANGE(BASE, START, END) \ 86 first##BASE = START, last##BASE = END 87#include "clang/AST/DeclNodes.inc" 88 }; 89 90 /// \brief A placeholder type used to construct an empty shell of a 91 /// decl-derived type that will be filled in later (e.g., by some 92 /// deserialization method). 93 struct EmptyShell { }; 94 95 /// IdentifierNamespace - The different namespaces in which 96 /// declarations may appear. According to C99 6.2.3, there are 97 /// four namespaces, labels, tags, members and ordinary 98 /// identifiers. C++ describes lookup completely differently: 99 /// certain lookups merely "ignore" certain kinds of declarations, 100 /// usually based on whether the declaration is of a type, etc. 101 /// 102 /// These are meant as bitmasks, so that searches in 103 /// C++ can look into the "tag" namespace during ordinary lookup. 104 /// 105 /// Decl currently provides 15 bits of IDNS bits. 106 enum IdentifierNamespace { 107 /// Labels, declared with 'x:' and referenced with 'goto x'. 108 IDNS_Label = 0x0001, 109 110 /// Tags, declared with 'struct foo;' and referenced with 111 /// 'struct foo'. All tags are also types. This is what 112 /// elaborated-type-specifiers look for in C. 113 IDNS_Tag = 0x0002, 114 115 /// Types, declared with 'struct foo', typedefs, etc. 116 /// This is what elaborated-type-specifiers look for in C++, 117 /// but note that it's ill-formed to find a non-tag. 118 IDNS_Type = 0x0004, 119 120 /// Members, declared with object declarations within tag 121 /// definitions. In C, these can only be found by "qualified" 122 /// lookup in member expressions. In C++, they're found by 123 /// normal lookup. 124 IDNS_Member = 0x0008, 125 126 /// Namespaces, declared with 'namespace foo {}'. 127 /// Lookup for nested-name-specifiers find these. 128 IDNS_Namespace = 0x0010, 129 130 /// Ordinary names. In C, everything that's not a label, tag, 131 /// or member ends up here. 132 IDNS_Ordinary = 0x0020, 133 134 /// Objective C @protocol. 135 IDNS_ObjCProtocol = 0x0040, 136 137 /// This declaration is a friend function. A friend function 138 /// declaration is always in this namespace but may also be in 139 /// IDNS_Ordinary if it was previously declared. 140 IDNS_OrdinaryFriend = 0x0080, 141 142 /// This declaration is a friend class. A friend class 143 /// declaration is always in this namespace but may also be in 144 /// IDNS_Tag|IDNS_Type if it was previously declared. 145 IDNS_TagFriend = 0x0100, 146 147 /// This declaration is a using declaration. A using declaration 148 /// *introduces* a number of other declarations into the current 149 /// scope, and those declarations use the IDNS of their targets, 150 /// but the actual using declarations go in this namespace. 151 IDNS_Using = 0x0200, 152 153 /// This declaration is a C++ operator declared in a non-class 154 /// context. All such operators are also in IDNS_Ordinary. 155 /// C++ lexical operator lookup looks for these. 156 IDNS_NonMemberOperator = 0x0400 157 }; 158 159 /// ObjCDeclQualifier - Qualifier used on types in method declarations 160 /// for remote messaging. They are meant for the arguments though and 161 /// applied to the Decls (ObjCMethodDecl and ParmVarDecl). 162 enum ObjCDeclQualifier { 163 OBJC_TQ_None = 0x0, 164 OBJC_TQ_In = 0x1, 165 OBJC_TQ_Inout = 0x2, 166 OBJC_TQ_Out = 0x4, 167 OBJC_TQ_Bycopy = 0x8, 168 OBJC_TQ_Byref = 0x10, 169 OBJC_TQ_Oneway = 0x20 170 }; 171 172private: 173 /// NextDeclInContext - The next declaration within the same lexical 174 /// DeclContext. These pointers form the linked list that is 175 /// traversed via DeclContext's decls_begin()/decls_end(). 176 Decl *NextDeclInContext; 177 178 friend class DeclContext; 179 180 struct MultipleDC { 181 DeclContext *SemanticDC; 182 DeclContext *LexicalDC; 183 }; 184 185 186 /// DeclCtx - Holds either a DeclContext* or a MultipleDC*. 187 /// For declarations that don't contain C++ scope specifiers, it contains 188 /// the DeclContext where the Decl was declared. 189 /// For declarations with C++ scope specifiers, it contains a MultipleDC* 190 /// with the context where it semantically belongs (SemanticDC) and the 191 /// context where it was lexically declared (LexicalDC). 192 /// e.g.: 193 /// 194 /// namespace A { 195 /// void f(); // SemanticDC == LexicalDC == 'namespace A' 196 /// } 197 /// void A::f(); // SemanticDC == namespace 'A' 198 /// // LexicalDC == global namespace 199 llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx; 200 201 inline bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); } 202 inline bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); } 203 inline MultipleDC *getMultipleDC() const { 204 return DeclCtx.get<MultipleDC*>(); 205 } 206 inline DeclContext *getSemanticDC() const { 207 return DeclCtx.get<DeclContext*>(); 208 } 209 210 /// Loc - The location of this decl. 211 SourceLocation Loc; 212 213 /// DeclKind - This indicates which class this is. 214 unsigned DeclKind : 8; 215 216 /// InvalidDecl - This indicates a semantic error occurred. 217 unsigned InvalidDecl : 1; 218 219 /// HasAttrs - This indicates whether the decl has attributes or not. 220 unsigned HasAttrs : 1; 221 222 /// Implicit - Whether this declaration was implicitly generated by 223 /// the implementation rather than explicitly written by the user. 224 unsigned Implicit : 1; 225 226 /// \brief Whether this declaration was "used", meaning that a definition is 227 /// required. 228 unsigned Used : 1; 229 230protected: 231 /// Access - Used by C++ decls for the access specifier. 232 // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum 233 unsigned Access : 2; 234 friend class CXXClassMemberWrapper; 235 236 /// PCHLevel - the "level" of AST file from which this declaration was built. 237 unsigned PCHLevel : 2; 238 239 /// ChangedAfterLoad - if this declaration has changed since being loaded 240 unsigned ChangedAfterLoad : 1; 241 242 /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in. 243 unsigned IdentifierNamespace : 12; 244 245 /// \brief Whether the \c CachedLinkage field is active. 246 /// 247 /// This field is only valid for NamedDecls subclasses. 248 mutable unsigned HasCachedLinkage : 1; 249 250 /// \brief If \c HasCachedLinkage, the linkage of this declaration. 251 /// 252 /// This field is only valid for NamedDecls subclasses. 253 mutable unsigned CachedLinkage : 2; 254 255 256private: 257 void CheckAccessDeclContext() const; 258 259protected: 260 261 Decl(Kind DK, DeclContext *DC, SourceLocation L) 262 : NextDeclInContext(0), DeclCtx(DC), 263 Loc(L), DeclKind(DK), InvalidDecl(0), 264 HasAttrs(false), Implicit(false), Used(false), 265 Access(AS_none), PCHLevel(0), ChangedAfterLoad(false), 266 IdentifierNamespace(getIdentifierNamespaceForKind(DK)), 267 HasCachedLinkage(0) 268 { 269 if (Decl::CollectingStats()) add(DK); 270 } 271 272 Decl(Kind DK, EmptyShell Empty) 273 : NextDeclInContext(0), DeclKind(DK), InvalidDecl(0), 274 HasAttrs(false), Implicit(false), Used(false), 275 Access(AS_none), PCHLevel(0), ChangedAfterLoad(false), 276 IdentifierNamespace(getIdentifierNamespaceForKind(DK)), 277 HasCachedLinkage(0) 278 { 279 if (Decl::CollectingStats()) add(DK); 280 } 281 282 virtual ~Decl(); 283 284public: 285 286 /// \brief Source range that this declaration covers. 287 virtual SourceRange getSourceRange() const { 288 return SourceRange(getLocation(), getLocation()); 289 } 290 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 291 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 292 293 SourceLocation getLocation() const { return Loc; } 294 void setLocation(SourceLocation L) { Loc = L; } 295 296 Kind getKind() const { return static_cast<Kind>(DeclKind); } 297 const char *getDeclKindName() const; 298 299 Decl *getNextDeclInContext() { return NextDeclInContext; } 300 const Decl *getNextDeclInContext() const { return NextDeclInContext; } 301 302 DeclContext *getDeclContext() { 303 if (isInSemaDC()) 304 return getSemanticDC(); 305 return getMultipleDC()->SemanticDC; 306 } 307 const DeclContext *getDeclContext() const { 308 return const_cast<Decl*>(this)->getDeclContext(); 309 } 310 311 /// Finds the innermost non-closure context of this declaration. 312 /// That is, walk out the DeclContext chain, skipping any blocks. 313 DeclContext *getNonClosureContext(); 314 const DeclContext *getNonClosureContext() const { 315 return const_cast<Decl*>(this)->getNonClosureContext(); 316 } 317 318 TranslationUnitDecl *getTranslationUnitDecl(); 319 const TranslationUnitDecl *getTranslationUnitDecl() const { 320 return const_cast<Decl*>(this)->getTranslationUnitDecl(); 321 } 322 323 bool isInAnonymousNamespace() const; 324 325 ASTContext &getASTContext() const; 326 327 void setAccess(AccessSpecifier AS) { 328 Access = AS; 329#ifndef NDEBUG 330 CheckAccessDeclContext(); 331#endif 332 } 333 334 AccessSpecifier getAccess() const { 335#ifndef NDEBUG 336 CheckAccessDeclContext(); 337#endif 338 return AccessSpecifier(Access); 339 } 340 341 bool hasAttrs() const { return HasAttrs; } 342 void setAttrs(const AttrVec& Attrs); 343 AttrVec &getAttrs() { 344 return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs()); 345 } 346 const AttrVec &getAttrs() const; 347 void swapAttrs(Decl *D); 348 void dropAttrs(); 349 350 void addAttr(Attr *A) { 351 if (hasAttrs()) 352 getAttrs().push_back(A); 353 else 354 setAttrs(AttrVec(1, A)); 355 } 356 357 typedef AttrVec::const_iterator attr_iterator; 358 359 // FIXME: Do not rely on iterators having comparable singular values. 360 // Note that this should error out if they do not. 361 attr_iterator attr_begin() const { 362 return hasAttrs() ? getAttrs().begin() : 0; 363 } 364 attr_iterator attr_end() const { 365 return hasAttrs() ? getAttrs().end() : 0; 366 } 367 368 template <typename T> 369 specific_attr_iterator<T> specific_attr_begin() const { 370 return specific_attr_iterator<T>(attr_begin()); 371 } 372 template <typename T> 373 specific_attr_iterator<T> specific_attr_end() const { 374 return specific_attr_iterator<T>(attr_end()); 375 } 376 377 template<typename T> T *getAttr() const { 378 return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : 0; 379 } 380 template<typename T> bool hasAttr() const { 381 return hasAttrs() && hasSpecificAttr<T>(getAttrs()); 382 } 383 384 /// getMaxAlignment - return the maximum alignment specified by attributes 385 /// on this decl, 0 if there are none. 386 unsigned getMaxAlignment() const { 387 return hasAttrs() ? getMaxAttrAlignment(getAttrs(), getASTContext()) : 0; 388 } 389 390 /// setInvalidDecl - Indicates the Decl had a semantic error. This 391 /// allows for graceful error recovery. 392 void setInvalidDecl(bool Invalid = true); 393 bool isInvalidDecl() const { return (bool) InvalidDecl; } 394 395 /// isImplicit - Indicates whether the declaration was implicitly 396 /// generated by the implementation. If false, this declaration 397 /// was written explicitly in the source code. 398 bool isImplicit() const { return Implicit; } 399 void setImplicit(bool I = true) { Implicit = I; } 400 401 /// \brief Whether this declaration was used, meaning that a definition 402 /// is required. 403 /// 404 /// \param CheckUsedAttr When true, also consider the "used" attribute 405 /// (in addition to the "used" bit set by \c setUsed()) when determining 406 /// whether the function is used. 407 bool isUsed(bool CheckUsedAttr = true) const; 408 409 void setUsed(bool U = true) { Used = U; } 410 411 /// \brief Determine the availability of the given declaration. 412 /// 413 /// This routine will determine the most restrictive availability of 414 /// the given declaration (e.g., preferring 'unavailable' to 415 /// 'deprecated'). 416 /// 417 /// \param Message If non-NULL and the result is not \c 418 /// AR_Available, will be set to a (possibly empty) message 419 /// describing why the declaration has not been introduced, is 420 /// deprecated, or is unavailable. 421 AvailabilityResult getAvailability(std::string *Message = 0) const; 422 423 /// \brief Determine whether this declaration is marked 'deprecated'. 424 /// 425 /// \param Message If non-NULL and the declaration is deprecated, 426 /// this will be set to the message describing why the declaration 427 /// was deprecated (which may be empty). 428 bool isDeprecated(std::string *Message = 0) const { 429 return getAvailability(Message) == AR_Deprecated; 430 } 431 432 /// \brief Determine whether this declaration is marked 'unavailable'. 433 /// 434 /// \param Message If non-NULL and the declaration is unavailable, 435 /// this will be set to the message describing why the declaration 436 /// was made unavailable (which may be empty). 437 bool isUnavailable(std::string *Message = 0) const { 438 return getAvailability(Message) == AR_Unavailable; 439 } 440 441 /// \brief Determine whether this is a weak-imported symbol. 442 /// 443 /// Weak-imported symbols are typically marked with the 444 /// 'weak_import' attribute, but may also be marked with an 445 /// 'availability' attribute where we're targing a platform prior to 446 /// the introduction of this feature. 447 bool isWeakImported() const; 448 449 /// \brief Determines whether this symbol can be weak-imported, 450 /// e.g., whether it would be well-formed to add the weak_import 451 /// attribute. 452 /// 453 /// \param IsDefinition Set to \c true to indicate that this 454 /// declaration cannot be weak-imported because it has a definition. 455 bool canBeWeakImported(bool &IsDefinition) const; 456 457 /// \brief Retrieve the level of precompiled header from which this 458 /// declaration was generated. 459 /// 460 /// The PCH level of a declaration describes where the declaration originated 461 /// from. A PCH level of 0 indicates that the declaration was parsed from 462 /// source. A PCH level of 1 indicates that the declaration was loaded from 463 /// a top-level AST file. A PCH level 2 indicates that the declaration was 464 /// loaded from a PCH file the AST file depends on, and so on. 465 unsigned getPCHLevel() const { return PCHLevel; } 466 467 /// \brief The maximum PCH level that any declaration may have. 468 static const unsigned MaxPCHLevel = 3; 469 470 /// \brief Set the PCH level of this declaration. 471 void setPCHLevel(unsigned Level) { 472 assert(Level <= MaxPCHLevel && "PCH level exceeds the maximum"); 473 PCHLevel = Level; 474 } 475 476 /// \brief Query whether this declaration was changed in a significant way 477 /// since being loaded from an AST file. 478 /// 479 /// In an epic violation of layering, what is "significant" is entirely 480 /// up to the serialization system, but implemented in AST and Sema. 481 bool isChangedSinceDeserialization() const { return ChangedAfterLoad; } 482 483 /// \brief Mark this declaration as having changed since deserialization, or 484 /// reset the flag. 485 void setChangedSinceDeserialization(bool Changed) { 486 ChangedAfterLoad = Changed; 487 } 488 489 unsigned getIdentifierNamespace() const { 490 return IdentifierNamespace; 491 } 492 bool isInIdentifierNamespace(unsigned NS) const { 493 return getIdentifierNamespace() & NS; 494 } 495 static unsigned getIdentifierNamespaceForKind(Kind DK); 496 497 bool hasTagIdentifierNamespace() const { 498 return isTagIdentifierNamespace(getIdentifierNamespace()); 499 } 500 static bool isTagIdentifierNamespace(unsigned NS) { 501 // TagDecls have Tag and Type set and may also have TagFriend. 502 return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type); 503 } 504 505 /// getLexicalDeclContext - The declaration context where this Decl was 506 /// lexically declared (LexicalDC). May be different from 507 /// getDeclContext() (SemanticDC). 508 /// e.g.: 509 /// 510 /// namespace A { 511 /// void f(); // SemanticDC == LexicalDC == 'namespace A' 512 /// } 513 /// void A::f(); // SemanticDC == namespace 'A' 514 /// // LexicalDC == global namespace 515 DeclContext *getLexicalDeclContext() { 516 if (isInSemaDC()) 517 return getSemanticDC(); 518 return getMultipleDC()->LexicalDC; 519 } 520 const DeclContext *getLexicalDeclContext() const { 521 return const_cast<Decl*>(this)->getLexicalDeclContext(); 522 } 523 524 virtual bool isOutOfLine() const { 525 return getLexicalDeclContext() != getDeclContext(); 526 } 527 528 /// setDeclContext - Set both the semantic and lexical DeclContext 529 /// to DC. 530 void setDeclContext(DeclContext *DC); 531 532 void setLexicalDeclContext(DeclContext *DC); 533 534 /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this 535 /// scoped decl is defined outside the current function or method. This is 536 /// roughly global variables and functions, but also handles enums (which 537 /// could be defined inside or outside a function etc). 538 bool isDefinedOutsideFunctionOrMethod() const; 539 540 /// \brief Retrieves the "canonical" declaration of the given declaration. 541 virtual Decl *getCanonicalDecl() { return this; } 542 const Decl *getCanonicalDecl() const { 543 return const_cast<Decl*>(this)->getCanonicalDecl(); 544 } 545 546 /// \brief Whether this particular Decl is a canonical one. 547 bool isCanonicalDecl() const { return getCanonicalDecl() == this; } 548 549protected: 550 /// \brief Returns the next redeclaration or itself if this is the only decl. 551 /// 552 /// Decl subclasses that can be redeclared should override this method so that 553 /// Decl::redecl_iterator can iterate over them. 554 virtual Decl *getNextRedeclaration() { return this; } 555 556public: 557 /// \brief Iterates through all the redeclarations of the same decl. 558 class redecl_iterator { 559 /// Current - The current declaration. 560 Decl *Current; 561 Decl *Starter; 562 563 public: 564 typedef Decl* value_type; 565 typedef Decl* reference; 566 typedef Decl* pointer; 567 typedef std::forward_iterator_tag iterator_category; 568 typedef std::ptrdiff_t difference_type; 569 570 redecl_iterator() : Current(0) { } 571 explicit redecl_iterator(Decl *C) : Current(C), Starter(C) { } 572 573 reference operator*() const { return Current; } 574 pointer operator->() const { return Current; } 575 576 redecl_iterator& operator++() { 577 assert(Current && "Advancing while iterator has reached end"); 578 // Get either previous decl or latest decl. 579 Decl *Next = Current->getNextRedeclaration(); 580 assert(Next && "Should return next redeclaration or itself, never null!"); 581 Current = (Next != Starter ? Next : 0); 582 return *this; 583 } 584 585 redecl_iterator operator++(int) { 586 redecl_iterator tmp(*this); 587 ++(*this); 588 return tmp; 589 } 590 591 friend bool operator==(redecl_iterator x, redecl_iterator y) { 592 return x.Current == y.Current; 593 } 594 friend bool operator!=(redecl_iterator x, redecl_iterator y) { 595 return x.Current != y.Current; 596 } 597 }; 598 599 /// \brief Returns iterator for all the redeclarations of the same decl. 600 /// It will iterate at least once (when this decl is the only one). 601 redecl_iterator redecls_begin() const { 602 return redecl_iterator(const_cast<Decl*>(this)); 603 } 604 redecl_iterator redecls_end() const { return redecl_iterator(); } 605 606 /// getBody - If this Decl represents a declaration for a body of code, 607 /// such as a function or method definition, this method returns the 608 /// top-level Stmt* of that body. Otherwise this method returns null. 609 virtual Stmt* getBody() const { return 0; } 610 611 /// \brief Returns true if this Decl represents a declaration for a body of 612 /// code, such as a function or method definition. 613 virtual bool hasBody() const { return getBody() != 0; } 614 615 /// getBodyRBrace - Gets the right brace of the body, if a body exists. 616 /// This works whether the body is a CompoundStmt or a CXXTryStmt. 617 SourceLocation getBodyRBrace() const; 618 619 // global temp stats (until we have a per-module visitor) 620 static void add(Kind k); 621 static bool CollectingStats(bool Enable = false); 622 static void PrintStats(); 623 624 /// isTemplateParameter - Determines whether this declaration is a 625 /// template parameter. 626 bool isTemplateParameter() const; 627 628 /// isTemplateParameter - Determines whether this declaration is a 629 /// template parameter pack. 630 bool isTemplateParameterPack() const; 631 632 /// \brief Whether this declaration is a parameter pack. 633 bool isParameterPack() const; 634 635 /// \brief Whether this declaration is a function or function template. 636 bool isFunctionOrFunctionTemplate() const; 637 638 /// \brief Changes the namespace of this declaration to reflect that it's 639 /// the object of a friend declaration. 640 /// 641 /// These declarations appear in the lexical context of the friending 642 /// class, but in the semantic context of the actual entity. This property 643 /// applies only to a specific decl object; other redeclarations of the 644 /// same entity may not (and probably don't) share this property. 645 void setObjectOfFriendDecl(bool PreviouslyDeclared) { 646 unsigned OldNS = IdentifierNamespace; 647 assert((OldNS & (IDNS_Tag | IDNS_Ordinary | 648 IDNS_TagFriend | IDNS_OrdinaryFriend)) && 649 "namespace includes neither ordinary nor tag"); 650 assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | 651 IDNS_TagFriend | IDNS_OrdinaryFriend)) && 652 "namespace includes other than ordinary or tag"); 653 654 IdentifierNamespace = 0; 655 if (OldNS & (IDNS_Tag | IDNS_TagFriend)) { 656 IdentifierNamespace |= IDNS_TagFriend; 657 if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Tag | IDNS_Type; 658 } 659 660 if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend)) { 661 IdentifierNamespace |= IDNS_OrdinaryFriend; 662 if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Ordinary; 663 } 664 } 665 666 enum FriendObjectKind { 667 FOK_None, // not a friend object 668 FOK_Declared, // a friend of a previously-declared entity 669 FOK_Undeclared // a friend of a previously-undeclared entity 670 }; 671 672 /// \brief Determines whether this declaration is the object of a 673 /// friend declaration and, if so, what kind. 674 /// 675 /// There is currently no direct way to find the associated FriendDecl. 676 FriendObjectKind getFriendObjectKind() const { 677 unsigned mask 678 = (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend)); 679 if (!mask) return FOK_None; 680 return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? 681 FOK_Declared : FOK_Undeclared); 682 } 683 684 /// Specifies that this declaration is a C++ overloaded non-member. 685 void setNonMemberOperator() { 686 assert(getKind() == Function || getKind() == FunctionTemplate); 687 assert((IdentifierNamespace & IDNS_Ordinary) && 688 "visible non-member operators should be in ordinary namespace"); 689 IdentifierNamespace |= IDNS_NonMemberOperator; 690 } 691 692 // Implement isa/cast/dyncast/etc. 693 static bool classof(const Decl *) { return true; } 694 static bool classofKind(Kind K) { return true; } 695 static DeclContext *castToDeclContext(const Decl *); 696 static Decl *castFromDeclContext(const DeclContext *); 697 698 void print(llvm::raw_ostream &Out, unsigned Indentation = 0) const; 699 void print(llvm::raw_ostream &Out, const PrintingPolicy &Policy, 700 unsigned Indentation = 0) const; 701 static void printGroup(Decl** Begin, unsigned NumDecls, 702 llvm::raw_ostream &Out, const PrintingPolicy &Policy, 703 unsigned Indentation = 0); 704 void dump() const; 705 void dumpXML() const; 706 void dumpXML(llvm::raw_ostream &OS) const; 707 708private: 709 const Attr *getAttrsImpl() const; 710 711protected: 712 ASTMutationListener *getASTMutationListener() const; 713}; 714 715/// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when 716/// doing something to a specific decl. 717class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry { 718 const Decl *TheDecl; 719 SourceLocation Loc; 720 SourceManager &SM; 721 const char *Message; 722public: 723 PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, 724 SourceManager &sm, const char *Msg) 725 : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {} 726 727 virtual void print(llvm::raw_ostream &OS) const; 728}; 729 730class DeclContextLookupResult 731 : public std::pair<NamedDecl**,NamedDecl**> { 732public: 733 DeclContextLookupResult(NamedDecl **I, NamedDecl **E) 734 : std::pair<NamedDecl**,NamedDecl**>(I, E) {} 735 DeclContextLookupResult() 736 : std::pair<NamedDecl**,NamedDecl**>() {} 737 738 using std::pair<NamedDecl**,NamedDecl**>::operator=; 739}; 740 741class DeclContextLookupConstResult 742 : public std::pair<NamedDecl*const*, NamedDecl*const*> { 743public: 744 DeclContextLookupConstResult(std::pair<NamedDecl**,NamedDecl**> R) 745 : std::pair<NamedDecl*const*, NamedDecl*const*>(R) {} 746 DeclContextLookupConstResult(NamedDecl * const *I, NamedDecl * const *E) 747 : std::pair<NamedDecl*const*, NamedDecl*const*>(I, E) {} 748 DeclContextLookupConstResult() 749 : std::pair<NamedDecl*const*, NamedDecl*const*>() {} 750 751 using std::pair<NamedDecl*const*,NamedDecl*const*>::operator=; 752}; 753 754/// DeclContext - This is used only as base class of specific decl types that 755/// can act as declaration contexts. These decls are (only the top classes 756/// that directly derive from DeclContext are mentioned, not their subclasses): 757/// 758/// TranslationUnitDecl 759/// NamespaceDecl 760/// FunctionDecl 761/// TagDecl 762/// ObjCMethodDecl 763/// ObjCContainerDecl 764/// LinkageSpecDecl 765/// BlockDecl 766/// 767class DeclContext { 768 /// DeclKind - This indicates which class this is. 769 unsigned DeclKind : 8; 770 771 /// \brief Whether this declaration context also has some external 772 /// storage that contains additional declarations that are lexically 773 /// part of this context. 774 mutable unsigned ExternalLexicalStorage : 1; 775 776 /// \brief Whether this declaration context also has some external 777 /// storage that contains additional declarations that are visible 778 /// in this context. 779 mutable unsigned ExternalVisibleStorage : 1; 780 781 /// \brief Pointer to the data structure used to lookup declarations 782 /// within this context (or a DependentStoredDeclsMap if this is a 783 /// dependent context). 784 mutable StoredDeclsMap *LookupPtr; 785 786protected: 787 /// FirstDecl - The first declaration stored within this declaration 788 /// context. 789 mutable Decl *FirstDecl; 790 791 /// LastDecl - The last declaration stored within this declaration 792 /// context. FIXME: We could probably cache this value somewhere 793 /// outside of the DeclContext, to reduce the size of DeclContext by 794 /// another pointer. 795 mutable Decl *LastDecl; 796 797 friend class ExternalASTSource; 798 799 /// \brief Build up a chain of declarations. 800 /// 801 /// \returns the first/last pair of declarations. 802 static std::pair<Decl *, Decl *> 803 BuildDeclChain(const llvm::SmallVectorImpl<Decl*> &Decls); 804 805 DeclContext(Decl::Kind K) 806 : DeclKind(K), ExternalLexicalStorage(false), 807 ExternalVisibleStorage(false), LookupPtr(0), FirstDecl(0), 808 LastDecl(0) { } 809 810public: 811 ~DeclContext(); 812 813 Decl::Kind getDeclKind() const { 814 return static_cast<Decl::Kind>(DeclKind); 815 } 816 const char *getDeclKindName() const; 817 818 /// getParent - Returns the containing DeclContext. 819 DeclContext *getParent() { 820 return cast<Decl>(this)->getDeclContext(); 821 } 822 const DeclContext *getParent() const { 823 return const_cast<DeclContext*>(this)->getParent(); 824 } 825 826 /// getLexicalParent - Returns the containing lexical DeclContext. May be 827 /// different from getParent, e.g.: 828 /// 829 /// namespace A { 830 /// struct S; 831 /// } 832 /// struct A::S {}; // getParent() == namespace 'A' 833 /// // getLexicalParent() == translation unit 834 /// 835 DeclContext *getLexicalParent() { 836 return cast<Decl>(this)->getLexicalDeclContext(); 837 } 838 const DeclContext *getLexicalParent() const { 839 return const_cast<DeclContext*>(this)->getLexicalParent(); 840 } 841 842 DeclContext *getLookupParent(); 843 844 const DeclContext *getLookupParent() const { 845 return const_cast<DeclContext*>(this)->getLookupParent(); 846 } 847 848 ASTContext &getParentASTContext() const { 849 return cast<Decl>(this)->getASTContext(); 850 } 851 852 bool isClosure() const { 853 return DeclKind == Decl::Block; 854 } 855 856 bool isFunctionOrMethod() const { 857 switch (DeclKind) { 858 case Decl::Block: 859 case Decl::ObjCMethod: 860 return true; 861 default: 862 return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction; 863 } 864 } 865 866 bool isFileContext() const { 867 return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace; 868 } 869 870 bool isTranslationUnit() const { 871 return DeclKind == Decl::TranslationUnit; 872 } 873 874 bool isRecord() const { 875 return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord; 876 } 877 878 bool isNamespace() const { 879 return DeclKind == Decl::Namespace; 880 } 881 882 bool isInlineNamespace() const; 883 884 /// \brief Determines whether this context is dependent on a 885 /// template parameter. 886 bool isDependentContext() const; 887 888 /// isTransparentContext - Determines whether this context is a 889 /// "transparent" context, meaning that the members declared in this 890 /// context are semantically declared in the nearest enclosing 891 /// non-transparent (opaque) context but are lexically declared in 892 /// this context. For example, consider the enumerators of an 893 /// enumeration type: 894 /// @code 895 /// enum E { 896 /// Val1 897 /// }; 898 /// @endcode 899 /// Here, E is a transparent context, so its enumerator (Val1) will 900 /// appear (semantically) that it is in the same context of E. 901 /// Examples of transparent contexts include: enumerations (except for 902 /// C++0x scoped enums), and C++ linkage specifications. 903 bool isTransparentContext() const; 904 905 /// \brief Determines whether this context is, or is nested within, 906 /// a C++ extern "C" linkage spec. 907 bool isExternCContext() const; 908 909 /// \brief Determine whether this declaration context is equivalent 910 /// to the declaration context DC. 911 bool Equals(const DeclContext *DC) const { 912 return DC && this->getPrimaryContext() == DC->getPrimaryContext(); 913 } 914 915 /// \brief Determine whether this declaration context encloses the 916 /// declaration context DC. 917 bool Encloses(const DeclContext *DC) const; 918 919 /// getPrimaryContext - There may be many different 920 /// declarations of the same entity (including forward declarations 921 /// of classes, multiple definitions of namespaces, etc.), each with 922 /// a different set of declarations. This routine returns the 923 /// "primary" DeclContext structure, which will contain the 924 /// information needed to perform name lookup into this context. 925 DeclContext *getPrimaryContext(); 926 const DeclContext *getPrimaryContext() const { 927 return const_cast<DeclContext*>(this)->getPrimaryContext(); 928 } 929 930 /// getRedeclContext - Retrieve the context in which an entity conflicts with 931 /// other entities of the same name, or where it is a redeclaration if the 932 /// two entities are compatible. This skips through transparent contexts. 933 DeclContext *getRedeclContext(); 934 const DeclContext *getRedeclContext() const { 935 return const_cast<DeclContext *>(this)->getRedeclContext(); 936 } 937 938 /// \brief Retrieve the nearest enclosing namespace context. 939 DeclContext *getEnclosingNamespaceContext(); 940 const DeclContext *getEnclosingNamespaceContext() const { 941 return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext(); 942 } 943 944 /// \brief Test if this context is part of the enclosing namespace set of 945 /// the context NS, as defined in C++0x [namespace.def]p9. If either context 946 /// isn't a namespace, this is equivalent to Equals(). 947 /// 948 /// The enclosing namespace set of a namespace is the namespace and, if it is 949 /// inline, its enclosing namespace, recursively. 950 bool InEnclosingNamespaceSetOf(const DeclContext *NS) const; 951 952 /// getNextContext - If this is a DeclContext that may have other 953 /// DeclContexts that are semantically connected but syntactically 954 /// different, such as C++ namespaces, this routine retrieves the 955 /// next DeclContext in the link. Iteration through the chain of 956 /// DeclContexts should begin at the primary DeclContext and 957 /// continue until this function returns NULL. For example, given: 958 /// @code 959 /// namespace N { 960 /// int x; 961 /// } 962 /// namespace N { 963 /// int y; 964 /// } 965 /// @endcode 966 /// The first occurrence of namespace N will be the primary 967 /// DeclContext. Its getNextContext will return the second 968 /// occurrence of namespace N. 969 DeclContext *getNextContext(); 970 971 /// decl_iterator - Iterates through the declarations stored 972 /// within this context. 973 class decl_iterator { 974 /// Current - The current declaration. 975 Decl *Current; 976 977 public: 978 typedef Decl* value_type; 979 typedef Decl* reference; 980 typedef Decl* pointer; 981 typedef std::forward_iterator_tag iterator_category; 982 typedef std::ptrdiff_t difference_type; 983 984 decl_iterator() : Current(0) { } 985 explicit decl_iterator(Decl *C) : Current(C) { } 986 987 reference operator*() const { return Current; } 988 pointer operator->() const { return Current; } 989 990 decl_iterator& operator++() { 991 Current = Current->getNextDeclInContext(); 992 return *this; 993 } 994 995 decl_iterator operator++(int) { 996 decl_iterator tmp(*this); 997 ++(*this); 998 return tmp; 999 } 1000 1001 friend bool operator==(decl_iterator x, decl_iterator y) { 1002 return x.Current == y.Current; 1003 } 1004 friend bool operator!=(decl_iterator x, decl_iterator y) { 1005 return x.Current != y.Current; 1006 } 1007 }; 1008 1009 /// decls_begin/decls_end - Iterate over the declarations stored in 1010 /// this context. 1011 decl_iterator decls_begin() const; 1012 decl_iterator decls_end() const; 1013 bool decls_empty() const; 1014 1015 /// noload_decls_begin/end - Iterate over the declarations stored in this 1016 /// context that are currently loaded; don't attempt to retrieve anything 1017 /// from an external source. 1018 decl_iterator noload_decls_begin() const; 1019 decl_iterator noload_decls_end() const; 1020 1021 /// specific_decl_iterator - Iterates over a subrange of 1022 /// declarations stored in a DeclContext, providing only those that 1023 /// are of type SpecificDecl (or a class derived from it). This 1024 /// iterator is used, for example, to provide iteration over just 1025 /// the fields within a RecordDecl (with SpecificDecl = FieldDecl). 1026 template<typename SpecificDecl> 1027 class specific_decl_iterator { 1028 /// Current - The current, underlying declaration iterator, which 1029 /// will either be NULL or will point to a declaration of 1030 /// type SpecificDecl. 1031 DeclContext::decl_iterator Current; 1032 1033 /// SkipToNextDecl - Advances the current position up to the next 1034 /// declaration of type SpecificDecl that also meets the criteria 1035 /// required by Acceptable. 1036 void SkipToNextDecl() { 1037 while (*Current && !isa<SpecificDecl>(*Current)) 1038 ++Current; 1039 } 1040 1041 public: 1042 typedef SpecificDecl* value_type; 1043 typedef SpecificDecl* reference; 1044 typedef SpecificDecl* pointer; 1045 typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type 1046 difference_type; 1047 typedef std::forward_iterator_tag iterator_category; 1048 1049 specific_decl_iterator() : Current() { } 1050 1051 /// specific_decl_iterator - Construct a new iterator over a 1052 /// subset of the declarations the range [C, 1053 /// end-of-declarations). If A is non-NULL, it is a pointer to a 1054 /// member function of SpecificDecl that should return true for 1055 /// all of the SpecificDecl instances that will be in the subset 1056 /// of iterators. For example, if you want Objective-C instance 1057 /// methods, SpecificDecl will be ObjCMethodDecl and A will be 1058 /// &ObjCMethodDecl::isInstanceMethod. 1059 explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) { 1060 SkipToNextDecl(); 1061 } 1062 1063 reference operator*() const { return cast<SpecificDecl>(*Current); } 1064 pointer operator->() const { return cast<SpecificDecl>(*Current); } 1065 1066 specific_decl_iterator& operator++() { 1067 ++Current; 1068 SkipToNextDecl(); 1069 return *this; 1070 } 1071 1072 specific_decl_iterator operator++(int) { 1073 specific_decl_iterator tmp(*this); 1074 ++(*this); 1075 return tmp; 1076 } 1077 1078 friend bool 1079 operator==(const specific_decl_iterator& x, const specific_decl_iterator& y) { 1080 return x.Current == y.Current; 1081 } 1082 1083 friend bool 1084 operator!=(const specific_decl_iterator& x, const specific_decl_iterator& y) { 1085 return x.Current != y.Current; 1086 } 1087 }; 1088 1089 /// \brief Iterates over a filtered subrange of declarations stored 1090 /// in a DeclContext. 1091 /// 1092 /// This iterator visits only those declarations that are of type 1093 /// SpecificDecl (or a class derived from it) and that meet some 1094 /// additional run-time criteria. This iterator is used, for 1095 /// example, to provide access to the instance methods within an 1096 /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and 1097 /// Acceptable = ObjCMethodDecl::isInstanceMethod). 1098 template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const> 1099 class filtered_decl_iterator { 1100 /// Current - The current, underlying declaration iterator, which 1101 /// will either be NULL or will point to a declaration of 1102 /// type SpecificDecl. 1103 DeclContext::decl_iterator Current; 1104 1105 /// SkipToNextDecl - Advances the current position up to the next 1106 /// declaration of type SpecificDecl that also meets the criteria 1107 /// required by Acceptable. 1108 void SkipToNextDecl() { 1109 while (*Current && 1110 (!isa<SpecificDecl>(*Current) || 1111 (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)()))) 1112 ++Current; 1113 } 1114 1115 public: 1116 typedef SpecificDecl* value_type; 1117 typedef SpecificDecl* reference; 1118 typedef SpecificDecl* pointer; 1119 typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type 1120 difference_type; 1121 typedef std::forward_iterator_tag iterator_category; 1122 1123 filtered_decl_iterator() : Current() { } 1124 1125 /// specific_decl_iterator - Construct a new iterator over a 1126 /// subset of the declarations the range [C, 1127 /// end-of-declarations). If A is non-NULL, it is a pointer to a 1128 /// member function of SpecificDecl that should return true for 1129 /// all of the SpecificDecl instances that will be in the subset 1130 /// of iterators. For example, if you want Objective-C instance 1131 /// methods, SpecificDecl will be ObjCMethodDecl and A will be 1132 /// &ObjCMethodDecl::isInstanceMethod. 1133 explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) { 1134 SkipToNextDecl(); 1135 } 1136 1137 reference operator*() const { return cast<SpecificDecl>(*Current); } 1138 pointer operator->() const { return cast<SpecificDecl>(*Current); } 1139 1140 filtered_decl_iterator& operator++() { 1141 ++Current; 1142 SkipToNextDecl(); 1143 return *this; 1144 } 1145 1146 filtered_decl_iterator operator++(int) { 1147 filtered_decl_iterator tmp(*this); 1148 ++(*this); 1149 return tmp; 1150 } 1151 1152 friend bool 1153 operator==(const filtered_decl_iterator& x, const filtered_decl_iterator& y) { 1154 return x.Current == y.Current; 1155 } 1156 1157 friend bool 1158 operator!=(const filtered_decl_iterator& x, const filtered_decl_iterator& y) { 1159 return x.Current != y.Current; 1160 } 1161 }; 1162 1163 /// @brief Add the declaration D into this context. 1164 /// 1165 /// This routine should be invoked when the declaration D has first 1166 /// been declared, to place D into the context where it was 1167 /// (lexically) defined. Every declaration must be added to one 1168 /// (and only one!) context, where it can be visited via 1169 /// [decls_begin(), decls_end()). Once a declaration has been added 1170 /// to its lexical context, the corresponding DeclContext owns the 1171 /// declaration. 1172 /// 1173 /// If D is also a NamedDecl, it will be made visible within its 1174 /// semantic context via makeDeclVisibleInContext. 1175 void addDecl(Decl *D); 1176 1177 /// @brief Add the declaration D to this context without modifying 1178 /// any lookup tables. 1179 /// 1180 /// This is useful for some operations in dependent contexts where 1181 /// the semantic context might not be dependent; this basically 1182 /// only happens with friends. 1183 void addHiddenDecl(Decl *D); 1184 1185 /// @brief Removes a declaration from this context. 1186 void removeDecl(Decl *D); 1187 1188 /// lookup_iterator - An iterator that provides access to the results 1189 /// of looking up a name within this context. 1190 typedef NamedDecl **lookup_iterator; 1191 1192 /// lookup_const_iterator - An iterator that provides non-mutable 1193 /// access to the results of lookup up a name within this context. 1194 typedef NamedDecl * const * lookup_const_iterator; 1195 1196 typedef DeclContextLookupResult lookup_result; 1197 typedef DeclContextLookupConstResult lookup_const_result; 1198 1199 /// lookup - Find the declarations (if any) with the given Name in 1200 /// this context. Returns a range of iterators that contains all of 1201 /// the declarations with this name, with object, function, member, 1202 /// and enumerator names preceding any tag name. Note that this 1203 /// routine will not look into parent contexts. 1204 lookup_result lookup(DeclarationName Name); 1205 lookup_const_result lookup(DeclarationName Name) const; 1206 1207 /// @brief Makes a declaration visible within this context. 1208 /// 1209 /// This routine makes the declaration D visible to name lookup 1210 /// within this context and, if this is a transparent context, 1211 /// within its parent contexts up to the first enclosing 1212 /// non-transparent context. Making a declaration visible within a 1213 /// context does not transfer ownership of a declaration, and a 1214 /// declaration can be visible in many contexts that aren't its 1215 /// lexical context. 1216 /// 1217 /// If D is a redeclaration of an existing declaration that is 1218 /// visible from this context, as determined by 1219 /// NamedDecl::declarationReplaces, the previous declaration will be 1220 /// replaced with D. 1221 /// 1222 /// @param Recoverable true if it's okay to not add this decl to 1223 /// the lookup tables because it can be easily recovered by walking 1224 /// the declaration chains. 1225 void makeDeclVisibleInContext(NamedDecl *D, bool Recoverable = true); 1226 1227 /// \brief Deserialize all the visible declarations from external storage. 1228 /// 1229 /// Name lookup deserializes visible declarations lazily, thus a DeclContext 1230 /// may not have a complete name lookup table. This function deserializes 1231 /// the rest of visible declarations from the external storage and completes 1232 /// the name lookup table. 1233 void MaterializeVisibleDeclsFromExternalStorage(); 1234 1235 /// udir_iterator - Iterates through the using-directives stored 1236 /// within this context. 1237 typedef UsingDirectiveDecl * const * udir_iterator; 1238 1239 typedef std::pair<udir_iterator, udir_iterator> udir_iterator_range; 1240 1241 udir_iterator_range getUsingDirectives() const; 1242 1243 udir_iterator using_directives_begin() const { 1244 return getUsingDirectives().first; 1245 } 1246 1247 udir_iterator using_directives_end() const { 1248 return getUsingDirectives().second; 1249 } 1250 1251 // These are all defined in DependentDiagnostic.h. 1252 class ddiag_iterator; 1253 inline ddiag_iterator ddiag_begin() const; 1254 inline ddiag_iterator ddiag_end() const; 1255 1256 // Low-level accessors 1257 1258 /// \brief Retrieve the internal representation of the lookup structure. 1259 StoredDeclsMap* getLookupPtr() const { return LookupPtr; } 1260 1261 /// \brief Whether this DeclContext has external storage containing 1262 /// additional declarations that are lexically in this context. 1263 bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; } 1264 1265 /// \brief State whether this DeclContext has external storage for 1266 /// declarations lexically in this context. 1267 void setHasExternalLexicalStorage(bool ES = true) { 1268 ExternalLexicalStorage = ES; 1269 } 1270 1271 /// \brief Whether this DeclContext has external storage containing 1272 /// additional declarations that are visible in this context. 1273 bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; } 1274 1275 /// \brief State whether this DeclContext has external storage for 1276 /// declarations visible in this context. 1277 void setHasExternalVisibleStorage(bool ES = true) { 1278 ExternalVisibleStorage = ES; 1279 } 1280 1281 static bool classof(const Decl *D); 1282 static bool classof(const DeclContext *D) { return true; } 1283#define DECL(NAME, BASE) 1284#define DECL_CONTEXT(NAME) \ 1285 static bool classof(const NAME##Decl *D) { return true; } 1286#include "clang/AST/DeclNodes.inc" 1287 1288 void dumpDeclContext() const; 1289 1290private: 1291 void LoadLexicalDeclsFromExternalStorage() const; 1292 1293 friend class DependentDiagnostic; 1294 StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const; 1295 1296 void buildLookup(DeclContext *DCtx); 1297 void makeDeclVisibleInContextImpl(NamedDecl *D); 1298}; 1299 1300inline bool Decl::isTemplateParameter() const { 1301 return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm || 1302 getKind() == TemplateTemplateParm; 1303} 1304 1305// Specialization selected when ToTy is not a known subclass of DeclContext. 1306template <class ToTy, 1307 bool IsKnownSubtype = ::llvm::is_base_of< DeclContext, ToTy>::value> 1308struct cast_convert_decl_context { 1309 static const ToTy *doit(const DeclContext *Val) { 1310 return static_cast<const ToTy*>(Decl::castFromDeclContext(Val)); 1311 } 1312 1313 static ToTy *doit(DeclContext *Val) { 1314 return static_cast<ToTy*>(Decl::castFromDeclContext(Val)); 1315 } 1316}; 1317 1318// Specialization selected when ToTy is a known subclass of DeclContext. 1319template <class ToTy> 1320struct cast_convert_decl_context<ToTy, true> { 1321 static const ToTy *doit(const DeclContext *Val) { 1322 return static_cast<const ToTy*>(Val); 1323 } 1324 1325 static ToTy *doit(DeclContext *Val) { 1326 return static_cast<ToTy*>(Val); 1327 } 1328}; 1329 1330 1331} // end clang. 1332 1333namespace llvm { 1334 1335/// isa<T>(DeclContext*) 1336template<class ToTy> 1337struct isa_impl_wrap<ToTy, 1338 const ::clang::DeclContext,const ::clang::DeclContext> { 1339 static bool doit(const ::clang::DeclContext &Val) { 1340 return ToTy::classofKind(Val.getDeclKind()); 1341 } 1342}; 1343template<class ToTy> 1344struct isa_impl_wrap<ToTy, ::clang::DeclContext, ::clang::DeclContext> 1345 : public isa_impl_wrap<ToTy, 1346 const ::clang::DeclContext,const ::clang::DeclContext> {}; 1347 1348/// cast<T>(DeclContext*) 1349template<class ToTy> 1350struct cast_convert_val<ToTy, 1351 const ::clang::DeclContext,const ::clang::DeclContext> { 1352 static const ToTy &doit(const ::clang::DeclContext &Val) { 1353 return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); 1354 } 1355}; 1356template<class ToTy> 1357struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> { 1358 static ToTy &doit(::clang::DeclContext &Val) { 1359 return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); 1360 } 1361}; 1362template<class ToTy> 1363struct cast_convert_val<ToTy, 1364 const ::clang::DeclContext*, const ::clang::DeclContext*> { 1365 static const ToTy *doit(const ::clang::DeclContext *Val) { 1366 return ::clang::cast_convert_decl_context<ToTy>::doit(Val); 1367 } 1368}; 1369template<class ToTy> 1370struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> { 1371 static ToTy *doit(::clang::DeclContext *Val) { 1372 return ::clang::cast_convert_decl_context<ToTy>::doit(Val); 1373 } 1374}; 1375 1376/// Implement cast_convert_val for Decl -> DeclContext conversions. 1377template<class FromTy> 1378struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> { 1379 static ::clang::DeclContext &doit(const FromTy &Val) { 1380 return *FromTy::castToDeclContext(&Val); 1381 } 1382}; 1383 1384template<class FromTy> 1385struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> { 1386 static ::clang::DeclContext *doit(const FromTy *Val) { 1387 return FromTy::castToDeclContext(Val); 1388 } 1389}; 1390 1391template<class FromTy> 1392struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> { 1393 static const ::clang::DeclContext &doit(const FromTy &Val) { 1394 return *FromTy::castToDeclContext(&Val); 1395 } 1396}; 1397 1398template<class FromTy> 1399struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> { 1400 static const ::clang::DeclContext *doit(const FromTy *Val) { 1401 return FromTy::castToDeclContext(Val); 1402 } 1403}; 1404 1405} // end namespace llvm 1406 1407#endif 1408