DeclBase.h revision 770877fa855d1de462392e503ef08252614b0994
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/// Decl - This represents one declaration (or definition), e.g. a variable, 66/// typedef, function, struct, etc. 67/// 68class Decl { 69public: 70 /// \brief Lists the kind of concrete classes of Decl. 71 enum Kind { 72#define DECL(DERIVED, BASE) DERIVED, 73#define ABSTRACT_DECL(DECL) 74#define DECL_RANGE(BASE, START, END) \ 75 first##BASE = START, last##BASE = END, 76#define LAST_DECL_RANGE(BASE, START, END) \ 77 first##BASE = START, last##BASE = END 78#include "clang/AST/DeclNodes.inc" 79 }; 80 81 /// \brief A placeholder type used to construct an empty shell of a 82 /// decl-derived type that will be filled in later (e.g., by some 83 /// deserialization method). 84 struct EmptyShell { }; 85 86 /// IdentifierNamespace - The different namespaces in which 87 /// declarations may appear. According to C99 6.2.3, there are 88 /// four namespaces, labels, tags, members and ordinary 89 /// identifiers. C++ describes lookup completely differently: 90 /// certain lookups merely "ignore" certain kinds of declarations, 91 /// usually based on whether the declaration is of a type, etc. 92 /// 93 /// These are meant as bitmasks, so that searches in 94 /// C++ can look into the "tag" namespace during ordinary lookup. 95 /// 96 /// Decl currently provides 15 bits of IDNS bits. 97 enum IdentifierNamespace { 98 /// Labels, declared with 'x:' and referenced with 'goto x'. 99 IDNS_Label = 0x0001, 100 101 /// Tags, declared with 'struct foo;' and referenced with 102 /// 'struct foo'. All tags are also types. This is what 103 /// elaborated-type-specifiers look for in C. 104 IDNS_Tag = 0x0002, 105 106 /// Types, declared with 'struct foo', typedefs, etc. 107 /// This is what elaborated-type-specifiers look for in C++, 108 /// but note that it's ill-formed to find a non-tag. 109 IDNS_Type = 0x0004, 110 111 /// Members, declared with object declarations within tag 112 /// definitions. In C, these can only be found by "qualified" 113 /// lookup in member expressions. In C++, they're found by 114 /// normal lookup. 115 IDNS_Member = 0x0008, 116 117 /// Namespaces, declared with 'namespace foo {}'. 118 /// Lookup for nested-name-specifiers find these. 119 IDNS_Namespace = 0x0010, 120 121 /// Ordinary names. In C, everything that's not a label, tag, 122 /// or member ends up here. 123 IDNS_Ordinary = 0x0020, 124 125 /// Objective C @protocol. 126 IDNS_ObjCProtocol = 0x0040, 127 128 /// This declaration is a friend function. A friend function 129 /// declaration is always in this namespace but may also be in 130 /// IDNS_Ordinary if it was previously declared. 131 IDNS_OrdinaryFriend = 0x0080, 132 133 /// This declaration is a friend class. A friend class 134 /// declaration is always in this namespace but may also be in 135 /// IDNS_Tag|IDNS_Type if it was previously declared. 136 IDNS_TagFriend = 0x0100, 137 138 /// This declaration is a using declaration. A using declaration 139 /// *introduces* a number of other declarations into the current 140 /// scope, and those declarations use the IDNS of their targets, 141 /// but the actual using declarations go in this namespace. 142 IDNS_Using = 0x0200, 143 144 /// This declaration is a C++ operator declared in a non-class 145 /// context. All such operators are also in IDNS_Ordinary. 146 /// C++ lexical operator lookup looks for these. 147 IDNS_NonMemberOperator = 0x0400 148 }; 149 150 /// ObjCDeclQualifier - Qualifier used on types in method declarations 151 /// for remote messaging. They are meant for the arguments though and 152 /// applied to the Decls (ObjCMethodDecl and ParmVarDecl). 153 enum ObjCDeclQualifier { 154 OBJC_TQ_None = 0x0, 155 OBJC_TQ_In = 0x1, 156 OBJC_TQ_Inout = 0x2, 157 OBJC_TQ_Out = 0x4, 158 OBJC_TQ_Bycopy = 0x8, 159 OBJC_TQ_Byref = 0x10, 160 OBJC_TQ_Oneway = 0x20 161 }; 162 163private: 164 /// NextDeclInContext - The next declaration within the same lexical 165 /// DeclContext. These pointers form the linked list that is 166 /// traversed via DeclContext's decls_begin()/decls_end(). 167 Decl *NextDeclInContext; 168 169 friend class DeclContext; 170 171 struct MultipleDC { 172 DeclContext *SemanticDC; 173 DeclContext *LexicalDC; 174 }; 175 176 177 /// DeclCtx - Holds either a DeclContext* or a MultipleDC*. 178 /// For declarations that don't contain C++ scope specifiers, it contains 179 /// the DeclContext where the Decl was declared. 180 /// For declarations with C++ scope specifiers, it contains a MultipleDC* 181 /// with the context where it semantically belongs (SemanticDC) and the 182 /// context where it was lexically declared (LexicalDC). 183 /// e.g.: 184 /// 185 /// namespace A { 186 /// void f(); // SemanticDC == LexicalDC == 'namespace A' 187 /// } 188 /// void A::f(); // SemanticDC == namespace 'A' 189 /// // LexicalDC == global namespace 190 llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx; 191 192 inline bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); } 193 inline bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); } 194 inline MultipleDC *getMultipleDC() const { 195 return DeclCtx.get<MultipleDC*>(); 196 } 197 inline DeclContext *getSemanticDC() const { 198 return DeclCtx.get<DeclContext*>(); 199 } 200 201 /// Loc - The location of this decl. 202 SourceLocation Loc; 203 204 /// DeclKind - This indicates which class this is. 205 unsigned DeclKind : 8; 206 207 /// InvalidDecl - This indicates a semantic error occurred. 208 unsigned InvalidDecl : 1; 209 210 /// HasAttrs - This indicates whether the decl has attributes or not. 211 unsigned HasAttrs : 1; 212 213 /// Implicit - Whether this declaration was implicitly generated by 214 /// the implementation rather than explicitly written by the user. 215 unsigned Implicit : 1; 216 217 /// \brief Whether this declaration was "used", meaning that a definition is 218 /// required. 219 unsigned Used : 1; 220 221protected: 222 /// Access - Used by C++ decls for the access specifier. 223 // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum 224 unsigned Access : 2; 225 friend class CXXClassMemberWrapper; 226 227 /// PCHLevel - the "level" of AST file from which this declaration was built. 228 unsigned PCHLevel : 2; 229 230 /// ChangedAfterLoad - if this declaration has changed since being loaded 231 unsigned ChangedAfterLoad : 1; 232 233 /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in. 234 unsigned IdentifierNamespace : 12; 235 236 /// \brief Whether the \c CachedLinkage field is active. 237 /// 238 /// This field is only valid for NamedDecls subclasses. 239 mutable unsigned HasCachedLinkage : 1; 240 241 /// \brief If \c HasCachedLinkage, the linkage of this declaration. 242 /// 243 /// This field is only valid for NamedDecls subclasses. 244 mutable unsigned CachedLinkage : 2; 245 246 247private: 248 void CheckAccessDeclContext() const; 249 250protected: 251 252 Decl(Kind DK, DeclContext *DC, SourceLocation L) 253 : NextDeclInContext(0), DeclCtx(DC), 254 Loc(L), DeclKind(DK), InvalidDecl(0), 255 HasAttrs(false), Implicit(false), Used(false), 256 Access(AS_none), PCHLevel(0), ChangedAfterLoad(false), 257 IdentifierNamespace(getIdentifierNamespaceForKind(DK)), 258 HasCachedLinkage(0) 259 { 260 if (Decl::CollectingStats()) add(DK); 261 } 262 263 Decl(Kind DK, EmptyShell Empty) 264 : NextDeclInContext(0), DeclKind(DK), InvalidDecl(0), 265 HasAttrs(false), Implicit(false), Used(false), 266 Access(AS_none), PCHLevel(0), ChangedAfterLoad(false), 267 IdentifierNamespace(getIdentifierNamespaceForKind(DK)), 268 HasCachedLinkage(0) 269 { 270 if (Decl::CollectingStats()) add(DK); 271 } 272 273 virtual ~Decl(); 274 275public: 276 277 /// \brief Source range that this declaration covers. 278 SourceRange getSourceRange() const; 279 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 280 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 281 282 SourceLocation getLocation() const { return Loc; } 283 void setLocation(SourceLocation L) { Loc = L; } 284 285 Kind getKind() const { return static_cast<Kind>(DeclKind); } 286 const char *getDeclKindName() const; 287 288 Decl *getNextDeclInContext() { return NextDeclInContext; } 289 const Decl *getNextDeclInContext() const { return NextDeclInContext; } 290 291 DeclContext *getDeclContext() { 292 if (isInSemaDC()) 293 return getSemanticDC(); 294 return getMultipleDC()->SemanticDC; 295 } 296 const DeclContext *getDeclContext() const { 297 return const_cast<Decl*>(this)->getDeclContext(); 298 } 299 300 TranslationUnitDecl *getTranslationUnitDecl(); 301 const TranslationUnitDecl *getTranslationUnitDecl() const { 302 return const_cast<Decl*>(this)->getTranslationUnitDecl(); 303 } 304 305 bool isInAnonymousNamespace() const; 306 307 ASTContext &getASTContext() const; 308 309 void setAccess(AccessSpecifier AS) { 310 Access = AS; 311#ifndef NDEBUG 312 CheckAccessDeclContext(); 313#endif 314 } 315 316 AccessSpecifier getAccess() const { 317#ifndef NDEBUG 318 CheckAccessDeclContext(); 319#endif 320 return AccessSpecifier(Access); 321 } 322 323 bool hasAttrs() const { return HasAttrs; } 324 void setAttrs(const AttrVec& Attrs); 325 AttrVec &getAttrs() { 326 return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs()); 327 } 328 const AttrVec &getAttrs() const; 329 void swapAttrs(Decl *D); 330 void dropAttrs(); 331 332 void addAttr(Attr *A) { 333 if (hasAttrs()) 334 getAttrs().push_back(A); 335 else 336 setAttrs(AttrVec(1, A)); 337 } 338 339 typedef AttrVec::const_iterator attr_iterator; 340 341 // FIXME: Do not rely on iterators having comparable singular values. 342 // Note that this should error out if they do not. 343 attr_iterator attr_begin() const { 344 return hasAttrs() ? getAttrs().begin() : 0; 345 } 346 attr_iterator attr_end() const { 347 return hasAttrs() ? getAttrs().end() : 0; 348 } 349 350 template <typename T> 351 specific_attr_iterator<T> specific_attr_begin() const { 352 return specific_attr_iterator<T>(attr_begin()); 353 } 354 template <typename T> 355 specific_attr_iterator<T> specific_attr_end() const { 356 return specific_attr_iterator<T>(attr_end()); 357 } 358 359 template<typename T> T *getAttr() const { 360 return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : 0; 361 } 362 template<typename T> bool hasAttr() const { 363 return hasAttrs() && hasSpecificAttr<T>(getAttrs()); 364 } 365 366 /// getMaxAlignment - return the maximum alignment specified by attributes 367 /// on this decl, 0 if there are none. 368 unsigned getMaxAlignment() const { 369 return hasAttrs() ? getMaxAttrAlignment(getAttrs(), getASTContext()) : 0; 370 } 371 372 /// setInvalidDecl - Indicates the Decl had a semantic error. This 373 /// allows for graceful error recovery. 374 void setInvalidDecl(bool Invalid = true); 375 bool isInvalidDecl() const { return (bool) InvalidDecl; } 376 377 /// isImplicit - Indicates whether the declaration was implicitly 378 /// generated by the implementation. If false, this declaration 379 /// was written explicitly in the source code. 380 bool isImplicit() const { return Implicit; } 381 void setImplicit(bool I = true) { Implicit = I; } 382 383 /// \brief Whether this declaration was used, meaning that a definition 384 /// is required. 385 /// 386 /// \param CheckUsedAttr When true, also consider the "used" attribute 387 /// (in addition to the "used" bit set by \c setUsed()) when determining 388 /// whether the function is used. 389 bool isUsed(bool CheckUsedAttr = true) const; 390 391 void setUsed(bool U = true) { Used = U; } 392 393 /// \brief Retrieve the level of precompiled header from which this 394 /// declaration was generated. 395 /// 396 /// The PCH level of a declaration describes where the declaration originated 397 /// from. A PCH level of 0 indicates that the declaration was parsed from 398 /// source. A PCH level of 1 indicates that the declaration was loaded from 399 /// a top-level AST file. A PCH level 2 indicates that the declaration was 400 /// loaded from a PCH file the AST file depends on, and so on. 401 unsigned getPCHLevel() const { return PCHLevel; } 402 403 /// \brief The maximum PCH level that any declaration may have. 404 static const unsigned MaxPCHLevel = 3; 405 406 /// \brief Set the PCH level of this declaration. 407 void setPCHLevel(unsigned Level) { 408 assert(Level <= MaxPCHLevel && "PCH level exceeds the maximum"); 409 PCHLevel = Level; 410 } 411 412 /// \brief Query whether this declaration was changed in a significant way 413 /// since being loaded from an AST file. 414 /// 415 /// In an epic violation of layering, what is "significant" is entirely 416 /// up to the serialization system, but implemented in AST and Sema. 417 bool isChangedSinceDeserialization() const { return ChangedAfterLoad; } 418 419 /// \brief Mark this declaration as having changed since deserialization, or 420 /// reset the flag. 421 void setChangedSinceDeserialization(bool Changed) { 422 ChangedAfterLoad = Changed; 423 } 424 425 unsigned getIdentifierNamespace() const { 426 return IdentifierNamespace; 427 } 428 bool isInIdentifierNamespace(unsigned NS) const { 429 return getIdentifierNamespace() & NS; 430 } 431 static unsigned getIdentifierNamespaceForKind(Kind DK); 432 433 bool hasTagIdentifierNamespace() const { 434 return isTagIdentifierNamespace(getIdentifierNamespace()); 435 } 436 static bool isTagIdentifierNamespace(unsigned NS) { 437 // TagDecls have Tag and Type set and may also have TagFriend. 438 return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type); 439 } 440 441 /// getLexicalDeclContext - The declaration context where this Decl was 442 /// lexically declared (LexicalDC). May be different from 443 /// getDeclContext() (SemanticDC). 444 /// e.g.: 445 /// 446 /// namespace A { 447 /// void f(); // SemanticDC == LexicalDC == 'namespace A' 448 /// } 449 /// void A::f(); // SemanticDC == namespace 'A' 450 /// // LexicalDC == global namespace 451 DeclContext *getLexicalDeclContext() { 452 if (isInSemaDC()) 453 return getSemanticDC(); 454 return getMultipleDC()->LexicalDC; 455 } 456 const DeclContext *getLexicalDeclContext() const { 457 return const_cast<Decl*>(this)->getLexicalDeclContext(); 458 } 459 460 /// \brief Determine whether this declaration was written out-of-line, which 461 /// typically indicates that it was written with a qualified name in a scope 462 /// outside of its semantic scope. 463 bool isOutOfLine() const; 464 465 /// setDeclContext - Set both the semantic and lexical DeclContext 466 /// to DC. 467 void setDeclContext(DeclContext *DC); 468 469 void setLexicalDeclContext(DeclContext *DC); 470 471 /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this 472 /// scoped decl is defined outside the current function or method. This is 473 /// roughly global variables and functions, but also handles enums (which 474 /// could be defined inside or outside a function etc). 475 bool isDefinedOutsideFunctionOrMethod() const; 476 477 /// \brief Retrieves the "canonical" declaration of the given declaration. 478 Decl *getCanonicalDecl(); 479 const Decl *getCanonicalDecl() const { 480 return const_cast<Decl*>(this)->getCanonicalDecl(); 481 } 482 483 /// \brief Whether this particular Decl is a canonical one. 484 bool isCanonicalDecl() const { return getCanonicalDecl() == this; } 485 486protected: 487 /// \brief Returns the next redeclaration or itself if this is the only decl. 488 /// 489 /// Decl subclasses that can be redeclared should override this method so that 490 /// Decl::redecl_iterator can iterate over them. 491 virtual Decl *getNextRedeclaration() { return this; } 492 493public: 494 /// \brief Iterates through all the redeclarations of the same decl. 495 class redecl_iterator { 496 /// Current - The current declaration. 497 Decl *Current; 498 Decl *Starter; 499 500 public: 501 typedef Decl* value_type; 502 typedef Decl* reference; 503 typedef Decl* pointer; 504 typedef std::forward_iterator_tag iterator_category; 505 typedef std::ptrdiff_t difference_type; 506 507 redecl_iterator() : Current(0) { } 508 explicit redecl_iterator(Decl *C) : Current(C), Starter(C) { } 509 510 reference operator*() const { return Current; } 511 pointer operator->() const { return Current; } 512 513 redecl_iterator& operator++() { 514 assert(Current && "Advancing while iterator has reached end"); 515 // Get either previous decl or latest decl. 516 Decl *Next = Current->getNextRedeclaration(); 517 assert(Next && "Should return next redeclaration or itself, never null!"); 518 Current = (Next != Starter ? Next : 0); 519 return *this; 520 } 521 522 redecl_iterator operator++(int) { 523 redecl_iterator tmp(*this); 524 ++(*this); 525 return tmp; 526 } 527 528 friend bool operator==(redecl_iterator x, redecl_iterator y) { 529 return x.Current == y.Current; 530 } 531 friend bool operator!=(redecl_iterator x, redecl_iterator y) { 532 return x.Current != y.Current; 533 } 534 }; 535 536 /// \brief Returns iterator for all the redeclarations of the same decl. 537 /// It will iterate at least once (when this decl is the only one). 538 redecl_iterator redecls_begin() const { 539 return redecl_iterator(const_cast<Decl*>(this)); 540 } 541 redecl_iterator redecls_end() const { return redecl_iterator(); } 542 543 /// getBody - If this Decl represents a declaration for a body of code, 544 /// such as a function or method definition, this method returns the 545 /// top-level Stmt* of that body. Otherwise this method returns null. 546 Stmt* getBody() const; 547 548 /// \brief Returns true if this Decl represents a declaration for a body of 549 /// code, such as a function or method definition. 550 bool hasBody() const; 551 552 /// getBodyRBrace - Gets the right brace of the body, if a body exists. 553 /// This works whether the body is a CompoundStmt or a CXXTryStmt. 554 SourceLocation getBodyRBrace() const; 555 556 // global temp stats (until we have a per-module visitor) 557 static void add(Kind k); 558 static bool CollectingStats(bool Enable = false); 559 static void PrintStats(); 560 561 /// isTemplateParameter - Determines whether this declaration is a 562 /// template parameter. 563 bool isTemplateParameter() const; 564 565 /// isTemplateParameter - Determines whether this declaration is a 566 /// template parameter pack. 567 bool isTemplateParameterPack() const; 568 569 /// \brief Whether this declaration is a parameter pack. 570 bool isParameterPack() const; 571 572 /// \brief Whether this declaration is a function or function template. 573 bool isFunctionOrFunctionTemplate() const; 574 575 /// \brief Changes the namespace of this declaration to reflect that it's 576 /// the object of a friend declaration. 577 /// 578 /// These declarations appear in the lexical context of the friending 579 /// class, but in the semantic context of the actual entity. This property 580 /// applies only to a specific decl object; other redeclarations of the 581 /// same entity may not (and probably don't) share this property. 582 void setObjectOfFriendDecl(bool PreviouslyDeclared) { 583 unsigned OldNS = IdentifierNamespace; 584 assert((OldNS & (IDNS_Tag | IDNS_Ordinary | 585 IDNS_TagFriend | IDNS_OrdinaryFriend)) && 586 "namespace includes neither ordinary nor tag"); 587 assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | 588 IDNS_TagFriend | IDNS_OrdinaryFriend)) && 589 "namespace includes other than ordinary or tag"); 590 591 IdentifierNamespace = 0; 592 if (OldNS & (IDNS_Tag | IDNS_TagFriend)) { 593 IdentifierNamespace |= IDNS_TagFriend; 594 if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Tag | IDNS_Type; 595 } 596 597 if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend)) { 598 IdentifierNamespace |= IDNS_OrdinaryFriend; 599 if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Ordinary; 600 } 601 } 602 603 enum FriendObjectKind { 604 FOK_None, // not a friend object 605 FOK_Declared, // a friend of a previously-declared entity 606 FOK_Undeclared // a friend of a previously-undeclared entity 607 }; 608 609 /// \brief Determines whether this declaration is the object of a 610 /// friend declaration and, if so, what kind. 611 /// 612 /// There is currently no direct way to find the associated FriendDecl. 613 FriendObjectKind getFriendObjectKind() const { 614 unsigned mask 615 = (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend)); 616 if (!mask) return FOK_None; 617 return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? 618 FOK_Declared : FOK_Undeclared); 619 } 620 621 /// Specifies that this declaration is a C++ overloaded non-member. 622 void setNonMemberOperator() { 623 assert(getKind() == Function || getKind() == FunctionTemplate); 624 assert((IdentifierNamespace & IDNS_Ordinary) && 625 "visible non-member operators should be in ordinary namespace"); 626 IdentifierNamespace |= IDNS_NonMemberOperator; 627 } 628 629 // Implement isa/cast/dyncast/etc. 630 static bool classof(const Decl *) { return true; } 631 static bool classofKind(Kind K) { return true; } 632 static DeclContext *castToDeclContext(const Decl *); 633 static Decl *castFromDeclContext(const DeclContext *); 634 635 void print(llvm::raw_ostream &Out, unsigned Indentation = 0) const; 636 void print(llvm::raw_ostream &Out, const PrintingPolicy &Policy, 637 unsigned Indentation = 0) const; 638 static void printGroup(Decl** Begin, unsigned NumDecls, 639 llvm::raw_ostream &Out, const PrintingPolicy &Policy, 640 unsigned Indentation = 0); 641 void dump() const; 642 void dumpXML() const; 643 void dumpXML(llvm::raw_ostream &OS) const; 644 645private: 646 const Attr *getAttrsImpl() const; 647 648protected: 649 ASTMutationListener *getASTMutationListener() const; 650}; 651 652/// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when 653/// doing something to a specific decl. 654class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry { 655 const Decl *TheDecl; 656 SourceLocation Loc; 657 SourceManager &SM; 658 const char *Message; 659public: 660 PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, 661 SourceManager &sm, const char *Msg) 662 : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {} 663 664 virtual void print(llvm::raw_ostream &OS) const; 665}; 666 667class DeclContextLookupResult 668 : public std::pair<NamedDecl**,NamedDecl**> { 669public: 670 DeclContextLookupResult(NamedDecl **I, NamedDecl **E) 671 : std::pair<NamedDecl**,NamedDecl**>(I, E) {} 672 DeclContextLookupResult() 673 : std::pair<NamedDecl**,NamedDecl**>() {} 674 675 using std::pair<NamedDecl**,NamedDecl**>::operator=; 676}; 677 678class DeclContextLookupConstResult 679 : public std::pair<NamedDecl*const*, NamedDecl*const*> { 680public: 681 DeclContextLookupConstResult(std::pair<NamedDecl**,NamedDecl**> R) 682 : std::pair<NamedDecl*const*, NamedDecl*const*>(R) {} 683 DeclContextLookupConstResult(NamedDecl * const *I, NamedDecl * const *E) 684 : std::pair<NamedDecl*const*, NamedDecl*const*>(I, E) {} 685 DeclContextLookupConstResult() 686 : std::pair<NamedDecl*const*, NamedDecl*const*>() {} 687 688 using std::pair<NamedDecl*const*,NamedDecl*const*>::operator=; 689}; 690 691/// DeclContext - This is used only as base class of specific decl types that 692/// can act as declaration contexts. These decls are (only the top classes 693/// that directly derive from DeclContext are mentioned, not their subclasses): 694/// 695/// TranslationUnitDecl 696/// NamespaceDecl 697/// FunctionDecl 698/// TagDecl 699/// ObjCMethodDecl 700/// ObjCContainerDecl 701/// LinkageSpecDecl 702/// BlockDecl 703/// 704class DeclContext { 705 /// DeclKind - This indicates which class this is. 706 unsigned DeclKind : 8; 707 708 /// \brief Whether this declaration context also has some external 709 /// storage that contains additional declarations that are lexically 710 /// part of this context. 711 mutable unsigned ExternalLexicalStorage : 1; 712 713 /// \brief Whether this declaration context also has some external 714 /// storage that contains additional declarations that are visible 715 /// in this context. 716 mutable unsigned ExternalVisibleStorage : 1; 717 718 /// \brief Pointer to the data structure used to lookup declarations 719 /// within this context (or a DependentStoredDeclsMap if this is a 720 /// dependent context). 721 mutable StoredDeclsMap *LookupPtr; 722 723protected: 724 /// FirstDecl - The first declaration stored within this declaration 725 /// context. 726 mutable Decl *FirstDecl; 727 728 /// LastDecl - The last declaration stored within this declaration 729 /// context. FIXME: We could probably cache this value somewhere 730 /// outside of the DeclContext, to reduce the size of DeclContext by 731 /// another pointer. 732 mutable Decl *LastDecl; 733 734 friend class ExternalASTSource; 735 736 /// \brief Build up a chain of declarations. 737 /// 738 /// \returns the first/last pair of declarations. 739 static std::pair<Decl *, Decl *> 740 BuildDeclChain(const llvm::SmallVectorImpl<Decl*> &Decls); 741 742 DeclContext(Decl::Kind K) 743 : DeclKind(K), ExternalLexicalStorage(false), 744 ExternalVisibleStorage(false), LookupPtr(0), FirstDecl(0), 745 LastDecl(0) { } 746 747public: 748 ~DeclContext(); 749 750 Decl::Kind getDeclKind() const { 751 return static_cast<Decl::Kind>(DeclKind); 752 } 753 const char *getDeclKindName() const; 754 755 /// getParent - Returns the containing DeclContext. 756 DeclContext *getParent() { 757 return cast<Decl>(this)->getDeclContext(); 758 } 759 const DeclContext *getParent() const { 760 return const_cast<DeclContext*>(this)->getParent(); 761 } 762 763 /// getLexicalParent - Returns the containing lexical DeclContext. May be 764 /// different from getParent, e.g.: 765 /// 766 /// namespace A { 767 /// struct S; 768 /// } 769 /// struct A::S {}; // getParent() == namespace 'A' 770 /// // getLexicalParent() == translation unit 771 /// 772 DeclContext *getLexicalParent() { 773 return cast<Decl>(this)->getLexicalDeclContext(); 774 } 775 const DeclContext *getLexicalParent() const { 776 return const_cast<DeclContext*>(this)->getLexicalParent(); 777 } 778 779 DeclContext *getLookupParent(); 780 781 const DeclContext *getLookupParent() const { 782 return const_cast<DeclContext*>(this)->getLookupParent(); 783 } 784 785 ASTContext &getParentASTContext() const { 786 return cast<Decl>(this)->getASTContext(); 787 } 788 789 bool isFunctionOrMethod() const { 790 switch (DeclKind) { 791 case Decl::Block: 792 case Decl::ObjCMethod: 793 return true; 794 default: 795 return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction; 796 } 797 } 798 799 bool isFileContext() const { 800 return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace; 801 } 802 803 bool isTranslationUnit() const { 804 return DeclKind == Decl::TranslationUnit; 805 } 806 807 bool isRecord() const { 808 return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord; 809 } 810 811 bool isNamespace() const { 812 return DeclKind == Decl::Namespace; 813 } 814 815 bool isInlineNamespace() const; 816 817 /// \brief Determines whether this context is dependent on a 818 /// template parameter. 819 bool isDependentContext() const; 820 821 /// isTransparentContext - Determines whether this context is a 822 /// "transparent" context, meaning that the members declared in this 823 /// context are semantically declared in the nearest enclosing 824 /// non-transparent (opaque) context but are lexically declared in 825 /// this context. For example, consider the enumerators of an 826 /// enumeration type: 827 /// @code 828 /// enum E { 829 /// Val1 830 /// }; 831 /// @endcode 832 /// Here, E is a transparent context, so its enumerator (Val1) will 833 /// appear (semantically) that it is in the same context of E. 834 /// Examples of transparent contexts include: enumerations (except for 835 /// C++0x scoped enums), and C++ linkage specifications. 836 bool isTransparentContext() const; 837 838 /// \brief Determines whether this context is, or is nested within, 839 /// a C++ extern "C" linkage spec. 840 bool isExternCContext() const; 841 842 /// \brief Determine whether this declaration context is equivalent 843 /// to the declaration context DC. 844 bool Equals(const DeclContext *DC) const { 845 return DC && this->getPrimaryContext() == DC->getPrimaryContext(); 846 } 847 848 /// \brief Determine whether this declaration context encloses the 849 /// declaration context DC. 850 bool Encloses(const DeclContext *DC) const; 851 852 /// getPrimaryContext - There may be many different 853 /// declarations of the same entity (including forward declarations 854 /// of classes, multiple definitions of namespaces, etc.), each with 855 /// a different set of declarations. This routine returns the 856 /// "primary" DeclContext structure, which will contain the 857 /// information needed to perform name lookup into this context. 858 DeclContext *getPrimaryContext(); 859 const DeclContext *getPrimaryContext() const { 860 return const_cast<DeclContext*>(this)->getPrimaryContext(); 861 } 862 863 /// getRedeclContext - Retrieve the context in which an entity conflicts with 864 /// other entities of the same name, or where it is a redeclaration if the 865 /// two entities are compatible. This skips through transparent contexts. 866 DeclContext *getRedeclContext(); 867 const DeclContext *getRedeclContext() const { 868 return const_cast<DeclContext *>(this)->getRedeclContext(); 869 } 870 871 /// \brief Retrieve the nearest enclosing namespace context. 872 DeclContext *getEnclosingNamespaceContext(); 873 const DeclContext *getEnclosingNamespaceContext() const { 874 return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext(); 875 } 876 877 /// \brief Test if this context is part of the enclosing namespace set of 878 /// the context NS, as defined in C++0x [namespace.def]p9. If either context 879 /// isn't a namespace, this is equivalent to Equals(). 880 /// 881 /// The enclosing namespace set of a namespace is the namespace and, if it is 882 /// inline, its enclosing namespace, recursively. 883 bool InEnclosingNamespaceSetOf(const DeclContext *NS) const; 884 885 /// getNextContext - If this is a DeclContext that may have other 886 /// DeclContexts that are semantically connected but syntactically 887 /// different, such as C++ namespaces, this routine retrieves the 888 /// next DeclContext in the link. Iteration through the chain of 889 /// DeclContexts should begin at the primary DeclContext and 890 /// continue until this function returns NULL. For example, given: 891 /// @code 892 /// namespace N { 893 /// int x; 894 /// } 895 /// namespace N { 896 /// int y; 897 /// } 898 /// @endcode 899 /// The first occurrence of namespace N will be the primary 900 /// DeclContext. Its getNextContext will return the second 901 /// occurrence of namespace N. 902 DeclContext *getNextContext(); 903 904 /// decl_iterator - Iterates through the declarations stored 905 /// within this context. 906 class decl_iterator { 907 /// Current - The current declaration. 908 Decl *Current; 909 910 public: 911 typedef Decl* value_type; 912 typedef Decl* reference; 913 typedef Decl* pointer; 914 typedef std::forward_iterator_tag iterator_category; 915 typedef std::ptrdiff_t difference_type; 916 917 decl_iterator() : Current(0) { } 918 explicit decl_iterator(Decl *C) : Current(C) { } 919 920 reference operator*() const { return Current; } 921 pointer operator->() const { return Current; } 922 923 decl_iterator& operator++() { 924 Current = Current->getNextDeclInContext(); 925 return *this; 926 } 927 928 decl_iterator operator++(int) { 929 decl_iterator tmp(*this); 930 ++(*this); 931 return tmp; 932 } 933 934 friend bool operator==(decl_iterator x, decl_iterator y) { 935 return x.Current == y.Current; 936 } 937 friend bool operator!=(decl_iterator x, decl_iterator y) { 938 return x.Current != y.Current; 939 } 940 }; 941 942 /// decls_begin/decls_end - Iterate over the declarations stored in 943 /// this context. 944 decl_iterator decls_begin() const; 945 decl_iterator decls_end() const; 946 bool decls_empty() const; 947 948 /// noload_decls_begin/end - Iterate over the declarations stored in this 949 /// context that are currently loaded; don't attempt to retrieve anything 950 /// from an external source. 951 decl_iterator noload_decls_begin() const; 952 decl_iterator noload_decls_end() const; 953 954 /// specific_decl_iterator - Iterates over a subrange of 955 /// declarations stored in a DeclContext, providing only those that 956 /// are of type SpecificDecl (or a class derived from it). This 957 /// iterator is used, for example, to provide iteration over just 958 /// the fields within a RecordDecl (with SpecificDecl = FieldDecl). 959 template<typename SpecificDecl> 960 class specific_decl_iterator { 961 /// Current - The current, underlying declaration iterator, which 962 /// will either be NULL or will point to a declaration of 963 /// type SpecificDecl. 964 DeclContext::decl_iterator Current; 965 966 /// SkipToNextDecl - Advances the current position up to the next 967 /// declaration of type SpecificDecl that also meets the criteria 968 /// required by Acceptable. 969 void SkipToNextDecl() { 970 while (*Current && !isa<SpecificDecl>(*Current)) 971 ++Current; 972 } 973 974 public: 975 typedef SpecificDecl* value_type; 976 typedef SpecificDecl* reference; 977 typedef SpecificDecl* pointer; 978 typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type 979 difference_type; 980 typedef std::forward_iterator_tag iterator_category; 981 982 specific_decl_iterator() : Current() { } 983 984 /// specific_decl_iterator - Construct a new iterator over a 985 /// subset of the declarations the range [C, 986 /// end-of-declarations). If A is non-NULL, it is a pointer to a 987 /// member function of SpecificDecl that should return true for 988 /// all of the SpecificDecl instances that will be in the subset 989 /// of iterators. For example, if you want Objective-C instance 990 /// methods, SpecificDecl will be ObjCMethodDecl and A will be 991 /// &ObjCMethodDecl::isInstanceMethod. 992 explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) { 993 SkipToNextDecl(); 994 } 995 996 reference operator*() const { return cast<SpecificDecl>(*Current); } 997 pointer operator->() const { return cast<SpecificDecl>(*Current); } 998 999 specific_decl_iterator& operator++() { 1000 ++Current; 1001 SkipToNextDecl(); 1002 return *this; 1003 } 1004 1005 specific_decl_iterator operator++(int) { 1006 specific_decl_iterator tmp(*this); 1007 ++(*this); 1008 return tmp; 1009 } 1010 1011 friend bool 1012 operator==(const specific_decl_iterator& x, const specific_decl_iterator& y) { 1013 return x.Current == y.Current; 1014 } 1015 1016 friend bool 1017 operator!=(const specific_decl_iterator& x, const specific_decl_iterator& y) { 1018 return x.Current != y.Current; 1019 } 1020 }; 1021 1022 /// \brief Iterates over a filtered subrange of declarations stored 1023 /// in a DeclContext. 1024 /// 1025 /// This iterator visits only those declarations that are of type 1026 /// SpecificDecl (or a class derived from it) and that meet some 1027 /// additional run-time criteria. This iterator is used, for 1028 /// example, to provide access to the instance methods within an 1029 /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and 1030 /// Acceptable = ObjCMethodDecl::isInstanceMethod). 1031 template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const> 1032 class filtered_decl_iterator { 1033 /// Current - The current, underlying declaration iterator, which 1034 /// will either be NULL or will point to a declaration of 1035 /// type SpecificDecl. 1036 DeclContext::decl_iterator Current; 1037 1038 /// SkipToNextDecl - Advances the current position up to the next 1039 /// declaration of type SpecificDecl that also meets the criteria 1040 /// required by Acceptable. 1041 void SkipToNextDecl() { 1042 while (*Current && 1043 (!isa<SpecificDecl>(*Current) || 1044 (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)()))) 1045 ++Current; 1046 } 1047 1048 public: 1049 typedef SpecificDecl* value_type; 1050 typedef SpecificDecl* reference; 1051 typedef SpecificDecl* pointer; 1052 typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type 1053 difference_type; 1054 typedef std::forward_iterator_tag iterator_category; 1055 1056 filtered_decl_iterator() : Current() { } 1057 1058 /// specific_decl_iterator - Construct a new iterator over a 1059 /// subset of the declarations the range [C, 1060 /// end-of-declarations). If A is non-NULL, it is a pointer to a 1061 /// member function of SpecificDecl that should return true for 1062 /// all of the SpecificDecl instances that will be in the subset 1063 /// of iterators. For example, if you want Objective-C instance 1064 /// methods, SpecificDecl will be ObjCMethodDecl and A will be 1065 /// &ObjCMethodDecl::isInstanceMethod. 1066 explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) { 1067 SkipToNextDecl(); 1068 } 1069 1070 reference operator*() const { return cast<SpecificDecl>(*Current); } 1071 pointer operator->() const { return cast<SpecificDecl>(*Current); } 1072 1073 filtered_decl_iterator& operator++() { 1074 ++Current; 1075 SkipToNextDecl(); 1076 return *this; 1077 } 1078 1079 filtered_decl_iterator operator++(int) { 1080 filtered_decl_iterator tmp(*this); 1081 ++(*this); 1082 return tmp; 1083 } 1084 1085 friend bool 1086 operator==(const filtered_decl_iterator& x, const filtered_decl_iterator& y) { 1087 return x.Current == y.Current; 1088 } 1089 1090 friend bool 1091 operator!=(const filtered_decl_iterator& x, const filtered_decl_iterator& y) { 1092 return x.Current != y.Current; 1093 } 1094 }; 1095 1096 /// @brief Add the declaration D into this context. 1097 /// 1098 /// This routine should be invoked when the declaration D has first 1099 /// been declared, to place D into the context where it was 1100 /// (lexically) defined. Every declaration must be added to one 1101 /// (and only one!) context, where it can be visited via 1102 /// [decls_begin(), decls_end()). Once a declaration has been added 1103 /// to its lexical context, the corresponding DeclContext owns the 1104 /// declaration. 1105 /// 1106 /// If D is also a NamedDecl, it will be made visible within its 1107 /// semantic context via makeDeclVisibleInContext. 1108 void addDecl(Decl *D); 1109 1110 /// @brief Add the declaration D to this context without modifying 1111 /// any lookup tables. 1112 /// 1113 /// This is useful for some operations in dependent contexts where 1114 /// the semantic context might not be dependent; this basically 1115 /// only happens with friends. 1116 void addHiddenDecl(Decl *D); 1117 1118 /// @brief Removes a declaration from this context. 1119 void removeDecl(Decl *D); 1120 1121 /// lookup_iterator - An iterator that provides access to the results 1122 /// of looking up a name within this context. 1123 typedef NamedDecl **lookup_iterator; 1124 1125 /// lookup_const_iterator - An iterator that provides non-mutable 1126 /// access to the results of lookup up a name within this context. 1127 typedef NamedDecl * const * lookup_const_iterator; 1128 1129 typedef DeclContextLookupResult lookup_result; 1130 typedef DeclContextLookupConstResult lookup_const_result; 1131 1132 /// lookup - Find the declarations (if any) with the given Name in 1133 /// this context. Returns a range of iterators that contains all of 1134 /// the declarations with this name, with object, function, member, 1135 /// and enumerator names preceding any tag name. Note that this 1136 /// routine will not look into parent contexts. 1137 lookup_result lookup(DeclarationName Name); 1138 lookup_const_result lookup(DeclarationName Name) const; 1139 1140 /// @brief Makes a declaration visible within this context. 1141 /// 1142 /// This routine makes the declaration D visible to name lookup 1143 /// within this context and, if this is a transparent context, 1144 /// within its parent contexts up to the first enclosing 1145 /// non-transparent context. Making a declaration visible within a 1146 /// context does not transfer ownership of a declaration, and a 1147 /// declaration can be visible in many contexts that aren't its 1148 /// lexical context. 1149 /// 1150 /// If D is a redeclaration of an existing declaration that is 1151 /// visible from this context, as determined by 1152 /// NamedDecl::declarationReplaces, the previous declaration will be 1153 /// replaced with D. 1154 /// 1155 /// @param Recoverable true if it's okay to not add this decl to 1156 /// the lookup tables because it can be easily recovered by walking 1157 /// the declaration chains. 1158 void makeDeclVisibleInContext(NamedDecl *D, bool Recoverable = true); 1159 1160 /// \brief Deserialize all the visible declarations from external storage. 1161 /// 1162 /// Name lookup deserializes visible declarations lazily, thus a DeclContext 1163 /// may not have a complete name lookup table. This function deserializes 1164 /// the rest of visible declarations from the external storage and completes 1165 /// the name lookup table. 1166 void MaterializeVisibleDeclsFromExternalStorage(); 1167 1168 /// udir_iterator - Iterates through the using-directives stored 1169 /// within this context. 1170 typedef UsingDirectiveDecl * const * udir_iterator; 1171 1172 typedef std::pair<udir_iterator, udir_iterator> udir_iterator_range; 1173 1174 udir_iterator_range getUsingDirectives() const; 1175 1176 udir_iterator using_directives_begin() const { 1177 return getUsingDirectives().first; 1178 } 1179 1180 udir_iterator using_directives_end() const { 1181 return getUsingDirectives().second; 1182 } 1183 1184 // These are all defined in DependentDiagnostic.h. 1185 class ddiag_iterator; 1186 inline ddiag_iterator ddiag_begin() const; 1187 inline ddiag_iterator ddiag_end() const; 1188 1189 // Low-level accessors 1190 1191 /// \brief Retrieve the internal representation of the lookup structure. 1192 StoredDeclsMap* getLookupPtr() const { return LookupPtr; } 1193 1194 /// \brief Whether this DeclContext has external storage containing 1195 /// additional declarations that are lexically in this context. 1196 bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; } 1197 1198 /// \brief State whether this DeclContext has external storage for 1199 /// declarations lexically in this context. 1200 void setHasExternalLexicalStorage(bool ES = true) { 1201 ExternalLexicalStorage = ES; 1202 } 1203 1204 /// \brief Whether this DeclContext has external storage containing 1205 /// additional declarations that are visible in this context. 1206 bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; } 1207 1208 /// \brief State whether this DeclContext has external storage for 1209 /// declarations visible in this context. 1210 void setHasExternalVisibleStorage(bool ES = true) { 1211 ExternalVisibleStorage = ES; 1212 } 1213 1214 static bool classof(const Decl *D); 1215 static bool classof(const DeclContext *D) { return true; } 1216#define DECL(NAME, BASE) 1217#define DECL_CONTEXT(NAME) \ 1218 static bool classof(const NAME##Decl *D) { return true; } 1219#include "clang/AST/DeclNodes.inc" 1220 1221 void dumpDeclContext() const; 1222 1223private: 1224 void LoadLexicalDeclsFromExternalStorage() const; 1225 1226 friend class DependentDiagnostic; 1227 StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const; 1228 1229 void buildLookup(DeclContext *DCtx); 1230 void makeDeclVisibleInContextImpl(NamedDecl *D); 1231}; 1232 1233inline bool Decl::isTemplateParameter() const { 1234 return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm || 1235 getKind() == TemplateTemplateParm; 1236} 1237 1238// Specialization selected when ToTy is not a known subclass of DeclContext. 1239template <class ToTy, 1240 bool IsKnownSubtype = ::llvm::is_base_of< DeclContext, ToTy>::value> 1241struct cast_convert_decl_context { 1242 static const ToTy *doit(const DeclContext *Val) { 1243 return static_cast<const ToTy*>(Decl::castFromDeclContext(Val)); 1244 } 1245 1246 static ToTy *doit(DeclContext *Val) { 1247 return static_cast<ToTy*>(Decl::castFromDeclContext(Val)); 1248 } 1249}; 1250 1251// Specialization selected when ToTy is a known subclass of DeclContext. 1252template <class ToTy> 1253struct cast_convert_decl_context<ToTy, true> { 1254 static const ToTy *doit(const DeclContext *Val) { 1255 return static_cast<const ToTy*>(Val); 1256 } 1257 1258 static ToTy *doit(DeclContext *Val) { 1259 return static_cast<ToTy*>(Val); 1260 } 1261}; 1262 1263 1264} // end clang. 1265 1266namespace llvm { 1267 1268/// isa<T>(DeclContext*) 1269template<class ToTy> 1270struct isa_impl_wrap<ToTy, 1271 const ::clang::DeclContext,const ::clang::DeclContext> { 1272 static bool doit(const ::clang::DeclContext &Val) { 1273 return ToTy::classofKind(Val.getDeclKind()); 1274 } 1275}; 1276template<class ToTy> 1277struct isa_impl_wrap<ToTy, ::clang::DeclContext, ::clang::DeclContext> 1278 : public isa_impl_wrap<ToTy, 1279 const ::clang::DeclContext,const ::clang::DeclContext> {}; 1280 1281/// cast<T>(DeclContext*) 1282template<class ToTy> 1283struct cast_convert_val<ToTy, 1284 const ::clang::DeclContext,const ::clang::DeclContext> { 1285 static const ToTy &doit(const ::clang::DeclContext &Val) { 1286 return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); 1287 } 1288}; 1289template<class ToTy> 1290struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> { 1291 static ToTy &doit(::clang::DeclContext &Val) { 1292 return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); 1293 } 1294}; 1295template<class ToTy> 1296struct cast_convert_val<ToTy, 1297 const ::clang::DeclContext*, const ::clang::DeclContext*> { 1298 static const ToTy *doit(const ::clang::DeclContext *Val) { 1299 return ::clang::cast_convert_decl_context<ToTy>::doit(Val); 1300 } 1301}; 1302template<class ToTy> 1303struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> { 1304 static ToTy *doit(::clang::DeclContext *Val) { 1305 return ::clang::cast_convert_decl_context<ToTy>::doit(Val); 1306 } 1307}; 1308 1309/// Implement cast_convert_val for Decl -> DeclContext conversions. 1310template<class FromTy> 1311struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> { 1312 static ::clang::DeclContext &doit(const FromTy &Val) { 1313 return *FromTy::castToDeclContext(&Val); 1314 } 1315}; 1316 1317template<class FromTy> 1318struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> { 1319 static ::clang::DeclContext *doit(const FromTy *Val) { 1320 return FromTy::castToDeclContext(Val); 1321 } 1322}; 1323 1324template<class FromTy> 1325struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> { 1326 static const ::clang::DeclContext &doit(const FromTy &Val) { 1327 return *FromTy::castToDeclContext(&Val); 1328 } 1329}; 1330 1331template<class FromTy> 1332struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> { 1333 static const ::clang::DeclContext *doit(const FromTy *Val) { 1334 return FromTy::castToDeclContext(Val); 1335 } 1336}; 1337 1338} // end namespace llvm 1339 1340#endif 1341