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DeclBase.h
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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/AttrIterator.h"
19 #include "clang/Basic/Specifiers.h"
21 #include "llvm/ADT/PointerUnion.h"
22 #include "llvm/ADT/iterator.h"
23 #include "llvm/ADT/iterator_range.h"
24 #include "llvm/Support/Compiler.h"
25 #include "llvm/Support/PrettyStackTrace.h"
26 
27 namespace clang {
28 class ASTMutationListener;
29 class BlockDecl;
30 class CXXRecordDecl;
31 class CompoundStmt;
32 class DeclContext;
33 class DeclarationName;
34 class DependentDiagnostic;
35 class EnumDecl;
36 class ExportDecl;
37 class ExternalSourceSymbolAttr;
38 class FunctionDecl;
39 class FunctionType;
40 enum Linkage : unsigned char;
41 class LinkageComputer;
42 class LinkageSpecDecl;
43 class Module;
44 class NamedDecl;
45 class NamespaceDecl;
46 class ObjCCategoryDecl;
47 class ObjCCategoryImplDecl;
48 class ObjCContainerDecl;
49 class ObjCImplDecl;
50 class ObjCImplementationDecl;
51 class ObjCInterfaceDecl;
52 class ObjCMethodDecl;
53 class ObjCProtocolDecl;
54 struct PrintingPolicy;
55 class RecordDecl;
56 class Stmt;
57 class StoredDeclsMap;
58 class TemplateDecl;
59 class TranslationUnitDecl;
60 class UsingDirectiveDecl;
61 }
62 
63 namespace clang {
64 
65  /// \brief Captures the result of checking the availability of a
66  /// declaration.
72  };
73 
74 /// Decl - This represents one declaration (or definition), e.g. a variable,
75 /// typedef, function, struct, etc.
76 ///
77 /// Note: There are objects tacked on before the *beginning* of Decl
78 /// (and its subclasses) in its Decl::operator new(). Proper alignment
79 /// of all subclasses (not requiring more than the alignment of Decl) is
80 /// asserted in DeclBase.cpp.
81 class LLVM_ALIGNAS(/*alignof(uint64_t)*/ 8) Decl {
82 public:
83  /// \brief Lists the kind of concrete classes of Decl.
84  enum Kind {
85 #define DECL(DERIVED, BASE) DERIVED,
86 #define ABSTRACT_DECL(DECL)
87 #define DECL_RANGE(BASE, START, END) \
88  first##BASE = START, last##BASE = END,
89 #define LAST_DECL_RANGE(BASE, START, END) \
90  first##BASE = START, last##BASE = END
91 #include "clang/AST/DeclNodes.inc"
92  };
93 
94  /// \brief A placeholder type used to construct an empty shell of a
95  /// decl-derived type that will be filled in later (e.g., by some
96  /// deserialization method).
97  struct EmptyShell { };
98 
99  /// IdentifierNamespace - The different namespaces in which
100  /// declarations may appear. According to C99 6.2.3, there are
101  /// four namespaces, labels, tags, members and ordinary
102  /// identifiers. C++ describes lookup completely differently:
103  /// certain lookups merely "ignore" certain kinds of declarations,
104  /// usually based on whether the declaration is of a type, etc.
105  ///
106  /// These are meant as bitmasks, so that searches in
107  /// C++ can look into the "tag" namespace during ordinary lookup.
108  ///
109  /// Decl currently provides 15 bits of IDNS bits.
111  /// Labels, declared with 'x:' and referenced with 'goto x'.
112  IDNS_Label = 0x0001,
113 
114  /// Tags, declared with 'struct foo;' and referenced with
115  /// 'struct foo'. All tags are also types. This is what
116  /// elaborated-type-specifiers look for in C.
117  /// This also contains names that conflict with tags in the
118  /// same scope but that are otherwise ordinary names (non-type
119  /// template parameters and indirect field declarations).
120  IDNS_Tag = 0x0002,
121 
122  /// Types, declared with 'struct foo', typedefs, etc.
123  /// This is what elaborated-type-specifiers look for in C++,
124  /// but note that it's ill-formed to find a non-tag.
125  IDNS_Type = 0x0004,
126 
127  /// Members, declared with object declarations within tag
128  /// definitions. In C, these can only be found by "qualified"
129  /// lookup in member expressions. In C++, they're found by
130  /// normal lookup.
131  IDNS_Member = 0x0008,
132 
133  /// Namespaces, declared with 'namespace foo {}'.
134  /// Lookup for nested-name-specifiers find these.
135  IDNS_Namespace = 0x0010,
136 
137  /// Ordinary names. In C, everything that's not a label, tag,
138  /// member, or function-local extern ends up here.
139  IDNS_Ordinary = 0x0020,
140 
141  /// Objective C \@protocol.
142  IDNS_ObjCProtocol = 0x0040,
143 
144  /// This declaration is a friend function. A friend function
145  /// declaration is always in this namespace but may also be in
146  /// IDNS_Ordinary if it was previously declared.
147  IDNS_OrdinaryFriend = 0x0080,
148 
149  /// This declaration is a friend class. A friend class
150  /// declaration is always in this namespace but may also be in
151  /// IDNS_Tag|IDNS_Type if it was previously declared.
152  IDNS_TagFriend = 0x0100,
153 
154  /// This declaration is a using declaration. A using declaration
155  /// *introduces* a number of other declarations into the current
156  /// scope, and those declarations use the IDNS of their targets,
157  /// but the actual using declarations go in this namespace.
158  IDNS_Using = 0x0200,
159 
160  /// This declaration is a C++ operator declared in a non-class
161  /// context. All such operators are also in IDNS_Ordinary.
162  /// C++ lexical operator lookup looks for these.
163  IDNS_NonMemberOperator = 0x0400,
164 
165  /// This declaration is a function-local extern declaration of a
166  /// variable or function. This may also be IDNS_Ordinary if it
167  /// has been declared outside any function. These act mostly like
168  /// invisible friend declarations, but are also visible to unqualified
169  /// lookup within the scope of the declaring function.
170  IDNS_LocalExtern = 0x0800,
171 
172  /// This declaration is an OpenMP user defined reduction construction.
173  IDNS_OMPReduction = 0x1000
174  };
175 
176  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
177  /// parameter types in method declarations. Other than remembering
178  /// them and mangling them into the method's signature string, these
179  /// are ignored by the compiler; they are consumed by certain
180  /// remote-messaging frameworks.
181  ///
182  /// in, inout, and out are mutually exclusive and apply only to
183  /// method parameters. bycopy and byref are mutually exclusive and
184  /// apply only to method parameters (?). oneway applies only to
185  /// results. All of these expect their corresponding parameter to
186  /// have a particular type. None of this is currently enforced by
187  /// clang.
188  ///
189  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
191  OBJC_TQ_None = 0x0,
192  OBJC_TQ_In = 0x1,
193  OBJC_TQ_Inout = 0x2,
194  OBJC_TQ_Out = 0x4,
195  OBJC_TQ_Bycopy = 0x8,
196  OBJC_TQ_Byref = 0x10,
197  OBJC_TQ_Oneway = 0x20,
198 
199  /// The nullability qualifier is set when the nullability of the
200  /// result or parameter was expressed via a context-sensitive
201  /// keyword.
202  OBJC_TQ_CSNullability = 0x40
203  };
204 
205  /// The kind of ownership a declaration has, for visibility purposes.
206  /// This enumeration is designed such that higher values represent higher
207  /// levels of name hiding.
208  enum class ModuleOwnershipKind : unsigned {
209  /// This declaration is not owned by a module.
210  Unowned,
211  /// This declaration has an owning module, but is globally visible
212  /// (typically because its owning module is visible and we know that
213  /// modules cannot later become hidden in this compilation).
214  /// After serialization and deserialization, this will be converted
215  /// to VisibleWhenImported.
216  Visible,
217  /// This declaration has an owning module, and is visible when that
218  /// module is imported.
219  VisibleWhenImported,
220  /// This declaration has an owning module, but is only visible to
221  /// lookups that occur within that module.
222  ModulePrivate
223  };
224 
225 protected:
226  /// \brief The next declaration within the same lexical
227  /// DeclContext. These pointers form the linked list that is
228  /// traversed via DeclContext's decls_begin()/decls_end().
229  ///
230  /// The extra two bits are used for the ModuleOwnershipKind.
231  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
232 
233 private:
234  friend class DeclContext;
235 
236  struct MultipleDC {
237  DeclContext *SemanticDC;
238  DeclContext *LexicalDC;
239  };
240 
241 
242  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
243  /// For declarations that don't contain C++ scope specifiers, it contains
244  /// the DeclContext where the Decl was declared.
245  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
246  /// with the context where it semantically belongs (SemanticDC) and the
247  /// context where it was lexically declared (LexicalDC).
248  /// e.g.:
249  ///
250  /// namespace A {
251  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
252  /// }
253  /// void A::f(); // SemanticDC == namespace 'A'
254  /// // LexicalDC == global namespace
255  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
256 
257  inline bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
258  inline bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
259  inline MultipleDC *getMultipleDC() const {
260  return DeclCtx.get<MultipleDC*>();
261  }
262  inline DeclContext *getSemanticDC() const {
263  return DeclCtx.get<DeclContext*>();
264  }
265 
266  /// Loc - The location of this decl.
267  SourceLocation Loc;
268 
269  /// DeclKind - This indicates which class this is.
270  unsigned DeclKind : 7;
271 
272  /// InvalidDecl - This indicates a semantic error occurred.
273  unsigned InvalidDecl : 1;
274 
275  /// HasAttrs - This indicates whether the decl has attributes or not.
276  unsigned HasAttrs : 1;
277 
278  /// Implicit - Whether this declaration was implicitly generated by
279  /// the implementation rather than explicitly written by the user.
280  unsigned Implicit : 1;
281 
282  /// \brief Whether this declaration was "used", meaning that a definition is
283  /// required.
284  unsigned Used : 1;
285 
286  /// \brief Whether this declaration was "referenced".
287  /// The difference with 'Used' is whether the reference appears in a
288  /// evaluated context or not, e.g. functions used in uninstantiated templates
289  /// are regarded as "referenced" but not "used".
290  unsigned Referenced : 1;
291 
292  /// \brief Whether this declaration is a top-level declaration (function,
293  /// global variable, etc.) that is lexically inside an objc container
294  /// definition.
295  unsigned TopLevelDeclInObjCContainer : 1;
296 
297  /// \brief Whether statistic collection is enabled.
298  static bool StatisticsEnabled;
299 
300 protected:
301  /// Access - Used by C++ decls for the access specifier.
302  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
303  unsigned Access : 2;
304  friend class CXXClassMemberWrapper;
305 
306  /// \brief Whether this declaration was loaded from an AST file.
307  unsigned FromASTFile : 1;
308 
309  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
310  unsigned IdentifierNamespace : 13;
311 
312  /// \brief If 0, we have not computed the linkage of this declaration.
313  /// Otherwise, it is the linkage + 1.
314  mutable unsigned CacheValidAndLinkage : 3;
315 
316  friend class ASTDeclWriter;
317  friend class ASTDeclReader;
318  friend class ASTReader;
319  friend class LinkageComputer;
320 
321  template<typename decl_type> friend class Redeclarable;
322 
323  /// \brief Allocate memory for a deserialized declaration.
324  ///
325  /// This routine must be used to allocate memory for any declaration that is
326  /// deserialized from a module file.
327  ///
328  /// \param Size The size of the allocated object.
329  /// \param Ctx The context in which we will allocate memory.
330  /// \param ID The global ID of the deserialized declaration.
331  /// \param Extra The amount of extra space to allocate after the object.
332  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
333  std::size_t Extra = 0);
334 
335  /// \brief Allocate memory for a non-deserialized declaration.
336  void *operator new(std::size_t Size, const ASTContext &Ctx,
337  DeclContext *Parent, std::size_t Extra = 0);
338 
339 private:
340  bool AccessDeclContextSanity() const;
341 
342  /// Get the module ownership kind to use for a local lexical child of \p DC,
343  /// which may be either a local or (rarely) an imported declaration.
344  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
345  if (DC) {
346  auto *D = cast<Decl>(DC);
347  auto MOK = D->getModuleOwnershipKind();
348  if (MOK != ModuleOwnershipKind::Unowned &&
349  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
350  return MOK;
351  // If D is not local and we have no local module storage, then we don't
352  // need to track module ownership at all.
353  }
354  return ModuleOwnershipKind::Unowned;
355  }
356 
357 protected:
359  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
360  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(0), HasAttrs(false),
361  Implicit(false), Used(false), Referenced(false),
362  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
363  IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
364  CacheValidAndLinkage(0) {
365  if (StatisticsEnabled) add(DK);
366  }
367 
368  Decl(Kind DK, EmptyShell Empty)
369  : NextInContextAndBits(), DeclKind(DK), InvalidDecl(0), HasAttrs(false),
370  Implicit(false), Used(false), Referenced(false),
371  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
372  IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
373  CacheValidAndLinkage(0) {
374  if (StatisticsEnabled) add(DK);
375  }
376 
377  virtual ~Decl();
378 
379  /// \brief Update a potentially out-of-date declaration.
380  void updateOutOfDate(IdentifierInfo &II) const;
381 
383  return Linkage(CacheValidAndLinkage - 1);
384  }
385 
386  void setCachedLinkage(Linkage L) const {
387  CacheValidAndLinkage = L + 1;
388  }
389 
390  bool hasCachedLinkage() const {
391  return CacheValidAndLinkage;
392  }
393 
394 public:
395 
396  /// \brief Source range that this declaration covers.
397  virtual SourceRange getSourceRange() const LLVM_READONLY {
398  return SourceRange(getLocation(), getLocation());
399  }
400  SourceLocation getLocStart() const LLVM_READONLY {
401  return getSourceRange().getBegin();
402  }
403  SourceLocation getLocEnd() const LLVM_READONLY {
404  return getSourceRange().getEnd();
405  }
406 
407  SourceLocation getLocation() const { return Loc; }
408  void setLocation(SourceLocation L) { Loc = L; }
409 
410  Kind getKind() const { return static_cast<Kind>(DeclKind); }
411  const char *getDeclKindName() const;
412 
413  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
414  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
415 
417  if (isInSemaDC())
418  return getSemanticDC();
419  return getMultipleDC()->SemanticDC;
420  }
421  const DeclContext *getDeclContext() const {
422  return const_cast<Decl*>(this)->getDeclContext();
423  }
424 
425  /// Find the innermost non-closure ancestor of this declaration,
426  /// walking up through blocks, lambdas, etc. If that ancestor is
427  /// not a code context (!isFunctionOrMethod()), returns null.
428  ///
429  /// A declaration may be its own non-closure context.
431  const Decl *getNonClosureContext() const {
432  return const_cast<Decl*>(this)->getNonClosureContext();
433  }
434 
435  TranslationUnitDecl *getTranslationUnitDecl();
437  return const_cast<Decl*>(this)->getTranslationUnitDecl();
438  }
439 
440  bool isInAnonymousNamespace() const;
441 
442  bool isInStdNamespace() const;
443 
444  ASTContext &getASTContext() const LLVM_READONLY;
445 
447  Access = AS;
448  assert(AccessDeclContextSanity());
449  }
450 
452  assert(AccessDeclContextSanity());
453  return AccessSpecifier(Access);
454  }
455 
456  /// \brief Retrieve the access specifier for this declaration, even though
457  /// it may not yet have been properly set.
459  return AccessSpecifier(Access);
460  }
461 
462  bool hasAttrs() const { return HasAttrs; }
463  void setAttrs(const AttrVec& Attrs) {
464  return setAttrsImpl(Attrs, getASTContext());
465  }
467  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
468  }
469  const AttrVec &getAttrs() const;
470  void dropAttrs();
471 
472  void addAttr(Attr *A) {
473  if (hasAttrs())
474  getAttrs().push_back(A);
475  else
476  setAttrs(AttrVec(1, A));
477  }
478 
479  typedef AttrVec::const_iterator attr_iterator;
480  typedef llvm::iterator_range<attr_iterator> attr_range;
481 
482  attr_range attrs() const {
483  return attr_range(attr_begin(), attr_end());
484  }
485 
486  attr_iterator attr_begin() const {
487  return hasAttrs() ? getAttrs().begin() : nullptr;
488  }
489  attr_iterator attr_end() const {
490  return hasAttrs() ? getAttrs().end() : nullptr;
491  }
492 
493  template <typename T>
494  void dropAttr() {
495  if (!HasAttrs) return;
496 
497  AttrVec &Vec = getAttrs();
498  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
499 
500  if (Vec.empty())
501  HasAttrs = false;
502  }
503 
504  template <typename T>
505  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
506  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
507  }
508 
509  template <typename T>
511  return specific_attr_iterator<T>(attr_begin());
512  }
513  template <typename T>
515  return specific_attr_iterator<T>(attr_end());
516  }
517 
518  template<typename T> T *getAttr() const {
519  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
520  }
521  template<typename T> bool hasAttr() const {
522  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
523  }
524 
525  /// getMaxAlignment - return the maximum alignment specified by attributes
526  /// on this decl, 0 if there are none.
527  unsigned getMaxAlignment() const;
528 
529  /// setInvalidDecl - Indicates the Decl had a semantic error. This
530  /// allows for graceful error recovery.
531  void setInvalidDecl(bool Invalid = true);
532  bool isInvalidDecl() const { return (bool) InvalidDecl; }
533 
534  /// isImplicit - Indicates whether the declaration was implicitly
535  /// generated by the implementation. If false, this declaration
536  /// was written explicitly in the source code.
537  bool isImplicit() const { return Implicit; }
538  void setImplicit(bool I = true) { Implicit = I; }
539 
540  /// \brief Whether *any* (re-)declaration of the entity was used, meaning that
541  /// a definition is required.
542  ///
543  /// \param CheckUsedAttr When true, also consider the "used" attribute
544  /// (in addition to the "used" bit set by \c setUsed()) when determining
545  /// whether the function is used.
546  bool isUsed(bool CheckUsedAttr = true) const;
547 
548  /// \brief Set whether the declaration is used, in the sense of odr-use.
549  ///
550  /// This should only be used immediately after creating a declaration.
551  /// It intentionally doesn't notify any listeners.
552  void setIsUsed() { getCanonicalDecl()->Used = true; }
553 
554  /// \brief Mark the declaration used, in the sense of odr-use.
555  ///
556  /// This notifies any mutation listeners in addition to setting a bit
557  /// indicating the declaration is used.
558  void markUsed(ASTContext &C);
559 
560  /// \brief Whether any declaration of this entity was referenced.
561  bool isReferenced() const;
562 
563  /// \brief Whether this declaration was referenced. This should not be relied
564  /// upon for anything other than debugging.
565  bool isThisDeclarationReferenced() const { return Referenced; }
566 
567  void setReferenced(bool R = true) { Referenced = R; }
568 
569  /// \brief Whether this declaration is a top-level declaration (function,
570  /// global variable, etc.) that is lexically inside an objc container
571  /// definition.
573  return TopLevelDeclInObjCContainer;
574  }
575 
576  void setTopLevelDeclInObjCContainer(bool V = true) {
577  TopLevelDeclInObjCContainer = V;
578  }
579 
580  /// \brief Looks on this and related declarations for an applicable
581  /// external source symbol attribute.
582  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
583 
584  /// \brief Whether this declaration was marked as being private to the
585  /// module in which it was defined.
586  bool isModulePrivate() const {
587  return getModuleOwnershipKind() == ModuleOwnershipKind::ModulePrivate;
588  }
589 
590  /// \brief Whether this declaration is exported (by virtue of being lexically
591  /// within an ExportDecl or by being a NamespaceDecl).
592  bool isExported() const;
593 
594  /// Return true if this declaration has an attribute which acts as
595  /// definition of the entity, such as 'alias' or 'ifunc'.
596  bool hasDefiningAttr() const;
597 
598  /// Return this declaration's defining attribute if it has one.
599  const Attr *getDefiningAttr() const;
600 
601 protected:
602  /// \brief Specify that this declaration was marked as being private
603  /// to the module in which it was defined.
605  // The module-private specifier has no effect on unowned declarations.
606  // FIXME: We should track this in some way for source fidelity.
607  if (getModuleOwnershipKind() == ModuleOwnershipKind::Unowned)
608  return;
609  setModuleOwnershipKind(ModuleOwnershipKind::ModulePrivate);
610  }
611 
612  /// \brief Set the owning module ID.
613  void setOwningModuleID(unsigned ID) {
614  assert(isFromASTFile() && "Only works on a deserialized declaration");
615  *((unsigned*)this - 2) = ID;
616  }
617 
618 public:
619 
620  /// \brief Determine the availability of the given declaration.
621  ///
622  /// This routine will determine the most restrictive availability of
623  /// the given declaration (e.g., preferring 'unavailable' to
624  /// 'deprecated').
625  ///
626  /// \param Message If non-NULL and the result is not \c
627  /// AR_Available, will be set to a (possibly empty) message
628  /// describing why the declaration has not been introduced, is
629  /// deprecated, or is unavailable.
630  ///
631  /// \param EnclosingVersion The version to compare with. If empty, assume the
632  /// deployment target version.
634  getAvailability(std::string *Message = nullptr,
635  VersionTuple EnclosingVersion = VersionTuple()) const;
636 
637  /// \brief Retrieve the version of the target platform in which this
638  /// declaration was introduced.
639  ///
640  /// \returns An empty version tuple if this declaration has no 'introduced'
641  /// availability attributes, or the version tuple that's specified in the
642  /// attribute otherwise.
643  VersionTuple getVersionIntroduced() const;
644 
645  /// \brief Determine whether this declaration is marked 'deprecated'.
646  ///
647  /// \param Message If non-NULL and the declaration is deprecated,
648  /// this will be set to the message describing why the declaration
649  /// was deprecated (which may be empty).
650  bool isDeprecated(std::string *Message = nullptr) const {
651  return getAvailability(Message) == AR_Deprecated;
652  }
653 
654  /// \brief Determine whether this declaration is marked 'unavailable'.
655  ///
656  /// \param Message If non-NULL and the declaration is unavailable,
657  /// this will be set to the message describing why the declaration
658  /// was made unavailable (which may be empty).
659  bool isUnavailable(std::string *Message = nullptr) const {
660  return getAvailability(Message) == AR_Unavailable;
661  }
662 
663  /// \brief Determine whether this is a weak-imported symbol.
664  ///
665  /// Weak-imported symbols are typically marked with the
666  /// 'weak_import' attribute, but may also be marked with an
667  /// 'availability' attribute where we're targing a platform prior to
668  /// the introduction of this feature.
669  bool isWeakImported() const;
670 
671  /// \brief Determines whether this symbol can be weak-imported,
672  /// e.g., whether it would be well-formed to add the weak_import
673  /// attribute.
674  ///
675  /// \param IsDefinition Set to \c true to indicate that this
676  /// declaration cannot be weak-imported because it has a definition.
677  bool canBeWeakImported(bool &IsDefinition) const;
678 
679  /// \brief Determine whether this declaration came from an AST file (such as
680  /// a precompiled header or module) rather than having been parsed.
681  bool isFromASTFile() const { return FromASTFile; }
682 
683  /// \brief Retrieve the global declaration ID associated with this
684  /// declaration, which specifies where this Decl was loaded from.
685  unsigned getGlobalID() const {
686  if (isFromASTFile())
687  return *((const unsigned*)this - 1);
688  return 0;
689  }
690 
691  /// \brief Retrieve the global ID of the module that owns this particular
692  /// declaration.
693  unsigned getOwningModuleID() const {
694  if (isFromASTFile())
695  return *((const unsigned*)this - 2);
696  return 0;
697  }
698 
699 private:
700  Module *getOwningModuleSlow() const;
701 protected:
702  bool hasLocalOwningModuleStorage() const;
703 
704 public:
705  /// \brief Get the imported owning module, if this decl is from an imported
706  /// (non-local) module.
708  if (!isFromASTFile() || !hasOwningModule())
709  return nullptr;
710 
711  return getOwningModuleSlow();
712  }
713 
714  /// \brief Get the local owning module, if known. Returns nullptr if owner is
715  /// not yet known or declaration is not from a module.
717  if (isFromASTFile() || !hasOwningModule())
718  return nullptr;
719 
720  assert(hasLocalOwningModuleStorage() &&
721  "owned local decl but no local module storage");
722  return reinterpret_cast<Module *const *>(this)[-1];
723  }
725  assert(!isFromASTFile() && hasOwningModule() &&
726  hasLocalOwningModuleStorage() &&
727  "should not have a cached owning module");
728  reinterpret_cast<Module **>(this)[-1] = M;
729  }
730 
731  /// Is this declaration owned by some module?
732  bool hasOwningModule() const {
733  return getModuleOwnershipKind() != ModuleOwnershipKind::Unowned;
734  }
735 
736  /// Get the module that owns this declaration (for visibility purposes).
738  return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule();
739  }
740 
741  /// Get the module that owns this declaration for linkage purposes.
742  /// There only ever is such a module under the C++ Modules TS.
743  ///
744  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
745  /// all declarations in a global module fragment are unowned.
746  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
747 
748  /// \brief Determine whether this declaration might be hidden from name
749  /// lookup. Note that the declaration might be visible even if this returns
750  /// \c false, if the owning module is visible within the query context.
751  // FIXME: Rename this to make it clearer what it does.
752  bool isHidden() const {
753  return (int)getModuleOwnershipKind() > (int)ModuleOwnershipKind::Visible;
754  }
755 
756  /// Set that this declaration is globally visible, even if it came from a
757  /// module that is not visible.
759  if (isHidden())
760  setModuleOwnershipKind(ModuleOwnershipKind::Visible);
761  }
762 
763  /// \brief Get the kind of module ownership for this declaration.
765  return NextInContextAndBits.getInt();
766  }
767 
768  /// \brief Set whether this declaration is hidden from name lookup.
770  assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&
771  MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&
772  !hasLocalOwningModuleStorage()) &&
773  "no storage available for owning module for this declaration");
774  NextInContextAndBits.setInt(MOK);
775  }
776 
777  unsigned getIdentifierNamespace() const {
778  return IdentifierNamespace;
779  }
780  bool isInIdentifierNamespace(unsigned NS) const {
781  return getIdentifierNamespace() & NS;
782  }
783  static unsigned getIdentifierNamespaceForKind(Kind DK);
784 
786  return isTagIdentifierNamespace(getIdentifierNamespace());
787  }
788  static bool isTagIdentifierNamespace(unsigned NS) {
789  // TagDecls have Tag and Type set and may also have TagFriend.
790  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
791  }
792 
793  /// getLexicalDeclContext - The declaration context where this Decl was
794  /// lexically declared (LexicalDC). May be different from
795  /// getDeclContext() (SemanticDC).
796  /// e.g.:
797  ///
798  /// namespace A {
799  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
800  /// }
801  /// void A::f(); // SemanticDC == namespace 'A'
802  /// // LexicalDC == global namespace
804  if (isInSemaDC())
805  return getSemanticDC();
806  return getMultipleDC()->LexicalDC;
807  }
809  return const_cast<Decl*>(this)->getLexicalDeclContext();
810  }
811 
812  /// Determine whether this declaration is declared out of line (outside its
813  /// semantic context).
814  virtual bool isOutOfLine() const;
815 
816  /// setDeclContext - Set both the semantic and lexical DeclContext
817  /// to DC.
818  void setDeclContext(DeclContext *DC);
819 
820  void setLexicalDeclContext(DeclContext *DC);
821 
822  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
823  /// scoped decl is defined outside the current function or method. This is
824  /// roughly global variables and functions, but also handles enums (which
825  /// could be defined inside or outside a function etc).
827  return getParentFunctionOrMethod() == nullptr;
828  }
829 
830  /// \brief Returns true if this declaration lexically is inside a function.
831  /// It recognizes non-defining declarations as well as members of local
832  /// classes:
833  /// \code
834  /// void foo() { void bar(); }
835  /// void foo2() { class ABC { void bar(); }; }
836  /// \endcode
837  bool isLexicallyWithinFunctionOrMethod() const;
838 
839  /// \brief If this decl is defined inside a function/method/block it returns
840  /// the corresponding DeclContext, otherwise it returns null.
841  const DeclContext *getParentFunctionOrMethod() const;
843  return const_cast<DeclContext*>(
844  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
845  }
846 
847  /// \brief Retrieves the "canonical" declaration of the given declaration.
848  virtual Decl *getCanonicalDecl() { return this; }
849  const Decl *getCanonicalDecl() const {
850  return const_cast<Decl*>(this)->getCanonicalDecl();
851  }
852 
853  /// \brief Whether this particular Decl is a canonical one.
854  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
855 
856 protected:
857  /// \brief Returns the next redeclaration or itself if this is the only decl.
858  ///
859  /// Decl subclasses that can be redeclared should override this method so that
860  /// Decl::redecl_iterator can iterate over them.
861  virtual Decl *getNextRedeclarationImpl() { return this; }
862 
863  /// \brief Implementation of getPreviousDecl(), to be overridden by any
864  /// subclass that has a redeclaration chain.
865  virtual Decl *getPreviousDeclImpl() { return nullptr; }
866 
867  /// \brief Implementation of getMostRecentDecl(), to be overridden by any
868  /// subclass that has a redeclaration chain.
869  virtual Decl *getMostRecentDeclImpl() { return this; }
870 
871 public:
872  /// \brief Iterates through all the redeclarations of the same decl.
874  /// Current - The current declaration.
875  Decl *Current;
876  Decl *Starter;
877 
878  public:
879  typedef Decl *value_type;
880  typedef const value_type &reference;
881  typedef const value_type *pointer;
882  typedef std::forward_iterator_tag iterator_category;
884 
885  redecl_iterator() : Current(nullptr) { }
886  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) { }
887 
888  reference operator*() const { return Current; }
889  value_type operator->() const { return Current; }
890 
892  assert(Current && "Advancing while iterator has reached end");
893  // Get either previous decl or latest decl.
894  Decl *Next = Current->getNextRedeclarationImpl();
895  assert(Next && "Should return next redeclaration or itself, never null!");
896  Current = (Next != Starter) ? Next : nullptr;
897  return *this;
898  }
899 
901  redecl_iterator tmp(*this);
902  ++(*this);
903  return tmp;
904  }
905 
907  return x.Current == y.Current;
908  }
910  return x.Current != y.Current;
911  }
912  };
913 
914  typedef llvm::iterator_range<redecl_iterator> redecl_range;
915 
916  /// \brief Returns an iterator range for all the redeclarations of the same
917  /// decl. It will iterate at least once (when this decl is the only one).
918  redecl_range redecls() const {
919  return redecl_range(redecls_begin(), redecls_end());
920  }
921 
923  return redecl_iterator(const_cast<Decl *>(this));
924  }
926 
927  /// \brief Retrieve the previous declaration that declares the same entity
928  /// as this declaration, or NULL if there is no previous declaration.
929  Decl *getPreviousDecl() { return getPreviousDeclImpl(); }
930 
931  /// \brief Retrieve the most recent declaration that declares the same entity
932  /// as this declaration, or NULL if there is no previous declaration.
933  const Decl *getPreviousDecl() const {
934  return const_cast<Decl *>(this)->getPreviousDeclImpl();
935  }
936 
937  /// \brief True if this is the first declaration in its redeclaration chain.
938  bool isFirstDecl() const {
939  return getPreviousDecl() == nullptr;
940  }
941 
942  /// \brief Retrieve the most recent declaration that declares the same entity
943  /// as this declaration (which may be this declaration).
944  Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); }
945 
946  /// \brief Retrieve the most recent declaration that declares the same entity
947  /// as this declaration (which may be this declaration).
948  const Decl *getMostRecentDecl() const {
949  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
950  }
951 
952  /// getBody - If this Decl represents a declaration for a body of code,
953  /// such as a function or method definition, this method returns the
954  /// top-level Stmt* of that body. Otherwise this method returns null.
955  virtual Stmt* getBody() const { return nullptr; }
956 
957  /// \brief Returns true if this \c Decl represents a declaration for a body of
958  /// code, such as a function or method definition.
959  /// Note that \c hasBody can also return true if any redeclaration of this
960  /// \c Decl represents a declaration for a body of code.
961  virtual bool hasBody() const { return getBody() != nullptr; }
962 
963  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
964  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
965  SourceLocation getBodyRBrace() const;
966 
967  // global temp stats (until we have a per-module visitor)
968  static void add(Kind k);
969  static void EnableStatistics();
970  static void PrintStats();
971 
972  /// isTemplateParameter - Determines whether this declaration is a
973  /// template parameter.
974  bool isTemplateParameter() const;
975 
976  /// isTemplateParameter - Determines whether this declaration is a
977  /// template parameter pack.
978  bool isTemplateParameterPack() const;
979 
980  /// \brief Whether this declaration is a parameter pack.
981  bool isParameterPack() const;
982 
983  /// \brief returns true if this declaration is a template
984  bool isTemplateDecl() const;
985 
986  /// \brief Whether this declaration is a function or function template.
988  return (DeclKind >= Decl::firstFunction &&
989  DeclKind <= Decl::lastFunction) ||
990  DeclKind == FunctionTemplate;
991  }
992 
993  /// \brief If this is a declaration that describes some template, this
994  /// method returns that template declaration.
996 
997  /// \brief Returns the function itself, or the templated function if this is a
998  /// function template.
999  FunctionDecl *getAsFunction() LLVM_READONLY;
1000 
1001  const FunctionDecl *getAsFunction() const {
1002  return const_cast<Decl *>(this)->getAsFunction();
1003  }
1004 
1005  /// \brief Changes the namespace of this declaration to reflect that it's
1006  /// a function-local extern declaration.
1007  ///
1008  /// These declarations appear in the lexical context of the extern
1009  /// declaration, but in the semantic context of the enclosing namespace
1010  /// scope.
1012  Decl *Prev = getPreviousDecl();
1013  IdentifierNamespace &= ~IDNS_Ordinary;
1014 
1015  // It's OK for the declaration to still have the "invisible friend" flag or
1016  // the "conflicts with tag declarations in this scope" flag for the outer
1017  // scope.
1018  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1019  "namespace is not ordinary");
1020 
1021  IdentifierNamespace |= IDNS_LocalExtern;
1022  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1023  IdentifierNamespace |= IDNS_Ordinary;
1024  }
1025 
1026  /// \brief Determine whether this is a block-scope declaration with linkage.
1027  /// This will either be a local variable declaration declared 'extern', or a
1028  /// local function declaration.
1030  return IdentifierNamespace & IDNS_LocalExtern;
1031  }
1032 
1033  /// \brief Changes the namespace of this declaration to reflect that it's
1034  /// the object of a friend declaration.
1035  ///
1036  /// These declarations appear in the lexical context of the friending
1037  /// class, but in the semantic context of the actual entity. This property
1038  /// applies only to a specific decl object; other redeclarations of the
1039  /// same entity may not (and probably don't) share this property.
1040  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1041  unsigned OldNS = IdentifierNamespace;
1042  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1043  IDNS_TagFriend | IDNS_OrdinaryFriend |
1044  IDNS_LocalExtern)) &&
1045  "namespace includes neither ordinary nor tag");
1046  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1047  IDNS_TagFriend | IDNS_OrdinaryFriend |
1048  IDNS_LocalExtern)) &&
1049  "namespace includes other than ordinary or tag");
1050 
1051  Decl *Prev = getPreviousDecl();
1052  IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type);
1053 
1054  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1055  IdentifierNamespace |= IDNS_TagFriend;
1056  if (PerformFriendInjection ||
1057  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1058  IdentifierNamespace |= IDNS_Tag | IDNS_Type;
1059  }
1060 
1061  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | IDNS_LocalExtern)) {
1062  IdentifierNamespace |= IDNS_OrdinaryFriend;
1063  if (PerformFriendInjection ||
1064  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1065  IdentifierNamespace |= IDNS_Ordinary;
1066  }
1067  }
1068 
1070  FOK_None, ///< Not a friend object.
1071  FOK_Declared, ///< A friend of a previously-declared entity.
1072  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1073  };
1074 
1075  /// \brief Determines whether this declaration is the object of a
1076  /// friend declaration and, if so, what kind.
1077  ///
1078  /// There is currently no direct way to find the associated FriendDecl.
1080  unsigned mask =
1081  (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend));
1082  if (!mask) return FOK_None;
1083  return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared
1084  : FOK_Undeclared);
1085  }
1086 
1087  /// Specifies that this declaration is a C++ overloaded non-member.
1089  assert(getKind() == Function || getKind() == FunctionTemplate);
1090  assert((IdentifierNamespace & IDNS_Ordinary) &&
1091  "visible non-member operators should be in ordinary namespace");
1092  IdentifierNamespace |= IDNS_NonMemberOperator;
1093  }
1094 
1095  static bool classofKind(Kind K) { return true; }
1096  static DeclContext *castToDeclContext(const Decl *);
1097  static Decl *castFromDeclContext(const DeclContext *);
1098 
1099  void print(raw_ostream &Out, unsigned Indentation = 0,
1100  bool PrintInstantiation = false) const;
1101  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1102  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1103  static void printGroup(Decl** Begin, unsigned NumDecls,
1104  raw_ostream &Out, const PrintingPolicy &Policy,
1105  unsigned Indentation = 0);
1106  // Debuggers don't usually respect default arguments.
1107  void dump() const;
1108  // Same as dump(), but forces color printing.
1109  void dumpColor() const;
1110  void dump(raw_ostream &Out, bool Deserialize = false) const;
1111 
1112  /// \brief Looks through the Decl's underlying type to extract a FunctionType
1113  /// when possible. Will return null if the type underlying the Decl does not
1114  /// have a FunctionType.
1115  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1116 
1117 private:
1118  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1119  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1120  ASTContext &Ctx);
1121 
1122 protected:
1123  ASTMutationListener *getASTMutationListener() const;
1124 };
1125 
1126 /// \brief Determine whether two declarations declare the same entity.
1127 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1128  if (!D1 || !D2)
1129  return false;
1130 
1131  if (D1 == D2)
1132  return true;
1133 
1134  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1135 }
1136 
1137 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1138 /// doing something to a specific decl.
1139 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1140  const Decl *TheDecl;
1141  SourceLocation Loc;
1142  SourceManager &SM;
1143  const char *Message;
1144 public:
1146  SourceManager &sm, const char *Msg)
1147  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1148 
1149  void print(raw_ostream &OS) const override;
1150 };
1151 
1152 /// \brief The results of name lookup within a DeclContext. This is either a
1153 /// single result (with no stable storage) or a collection of results (with
1154 /// stable storage provided by the lookup table).
1157  ResultTy Result;
1158  // If there is only one lookup result, it would be invalidated by
1159  // reallocations of the name table, so store it separately.
1160  NamedDecl *Single;
1161 
1162  static NamedDecl *const SingleElementDummyList;
1163 
1164 public:
1165  DeclContextLookupResult() : Result(), Single() {}
1167  : Result(Result), Single() {}
1169  : Result(SingleElementDummyList), Single(Single) {}
1170 
1171  class iterator;
1172  typedef llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1173  std::random_access_iterator_tag,
1174  NamedDecl *const> IteratorBase;
1175  class iterator : public IteratorBase {
1176  value_type SingleElement;
1177 
1178  public:
1179  iterator() : IteratorBase(), SingleElement() {}
1180  explicit iterator(pointer Pos, value_type Single = nullptr)
1181  : IteratorBase(Pos), SingleElement(Single) {}
1182 
1184  return SingleElement ? SingleElement : IteratorBase::operator*();
1185  }
1186  };
1187  typedef iterator const_iterator;
1188  typedef iterator::pointer pointer;
1189  typedef iterator::reference reference;
1190 
1191  iterator begin() const { return iterator(Result.begin(), Single); }
1192  iterator end() const { return iterator(Result.end(), Single); }
1193 
1194  bool empty() const { return Result.empty(); }
1195  pointer data() const { return Single ? &Single : Result.data(); }
1196  size_t size() const { return Single ? 1 : Result.size(); }
1197  reference front() const { return Single ? Single : Result.front(); }
1198  reference back() const { return Single ? Single : Result.back(); }
1199  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1200 
1201  // FIXME: Remove this from the interface
1202  DeclContextLookupResult slice(size_t N) const {
1203  DeclContextLookupResult Sliced = Result.slice(N);
1204  Sliced.Single = Single;
1205  return Sliced;
1206  }
1207 };
1208 
1209 /// DeclContext - This is used only as base class of specific decl types that
1210 /// can act as declaration contexts. These decls are (only the top classes
1211 /// that directly derive from DeclContext are mentioned, not their subclasses):
1212 ///
1213 /// TranslationUnitDecl
1214 /// NamespaceDecl
1215 /// FunctionDecl
1216 /// TagDecl
1217 /// ObjCMethodDecl
1218 /// ObjCContainerDecl
1219 /// LinkageSpecDecl
1220 /// ExportDecl
1221 /// BlockDecl
1222 /// OMPDeclareReductionDecl
1223 ///
1225  /// DeclKind - This indicates which class this is.
1226  unsigned DeclKind : 8;
1227 
1228  /// \brief Whether this declaration context also has some external
1229  /// storage that contains additional declarations that are lexically
1230  /// part of this context.
1231  mutable bool ExternalLexicalStorage : 1;
1232 
1233  /// \brief Whether this declaration context also has some external
1234  /// storage that contains additional declarations that are visible
1235  /// in this context.
1236  mutable bool ExternalVisibleStorage : 1;
1237 
1238  /// \brief Whether this declaration context has had external visible
1239  /// storage added since the last lookup. In this case, \c LookupPtr's
1240  /// invariant may not hold and needs to be fixed before we perform
1241  /// another lookup.
1242  mutable bool NeedToReconcileExternalVisibleStorage : 1;
1243 
1244  /// \brief If \c true, this context may have local lexical declarations
1245  /// that are missing from the lookup table.
1246  mutable bool HasLazyLocalLexicalLookups : 1;
1247 
1248  /// \brief If \c true, the external source may have lexical declarations
1249  /// that are missing from the lookup table.
1250  mutable bool HasLazyExternalLexicalLookups : 1;
1251 
1252  /// \brief If \c true, lookups should only return identifier from
1253  /// DeclContext scope (for example TranslationUnit). Used in
1254  /// LookupQualifiedName()
1255  mutable bool UseQualifiedLookup : 1;
1256 
1257  /// \brief Pointer to the data structure used to lookup declarations
1258  /// within this context (or a DependentStoredDeclsMap if this is a
1259  /// dependent context). We maintain the invariant that, if the map
1260  /// contains an entry for a DeclarationName (and we haven't lazily
1261  /// omitted anything), then it contains all relevant entries for that
1262  /// name (modulo the hasExternalDecls() flag).
1263  mutable StoredDeclsMap *LookupPtr;
1264 
1265 protected:
1266  /// FirstDecl - The first declaration stored within this declaration
1267  /// context.
1268  mutable Decl *FirstDecl;
1269 
1270  /// LastDecl - The last declaration stored within this declaration
1271  /// context. FIXME: We could probably cache this value somewhere
1272  /// outside of the DeclContext, to reduce the size of DeclContext by
1273  /// another pointer.
1274  mutable Decl *LastDecl;
1275 
1276  friend class ExternalASTSource;
1277  friend class ASTDeclReader;
1278  friend class ASTWriter;
1279 
1280  /// \brief Build up a chain of declarations.
1281  ///
1282  /// \returns the first/last pair of declarations.
1283  static std::pair<Decl *, Decl *>
1284  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1285 
1287  : DeclKind(K), ExternalLexicalStorage(false),
1288  ExternalVisibleStorage(false),
1289  NeedToReconcileExternalVisibleStorage(false),
1290  HasLazyLocalLexicalLookups(false), HasLazyExternalLexicalLookups(false),
1291  UseQualifiedLookup(false),
1292  LookupPtr(nullptr), FirstDecl(nullptr), LastDecl(nullptr) {}
1293 
1294 public:
1295  ~DeclContext();
1296 
1298  return static_cast<Decl::Kind>(DeclKind);
1299  }
1300  const char *getDeclKindName() const;
1301 
1302  /// getParent - Returns the containing DeclContext.
1304  return cast<Decl>(this)->getDeclContext();
1305  }
1306  const DeclContext *getParent() const {
1307  return const_cast<DeclContext*>(this)->getParent();
1308  }
1309 
1310  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1311  /// different from getParent, e.g.:
1312  ///
1313  /// namespace A {
1314  /// struct S;
1315  /// }
1316  /// struct A::S {}; // getParent() == namespace 'A'
1317  /// // getLexicalParent() == translation unit
1318  ///
1320  return cast<Decl>(this)->getLexicalDeclContext();
1321  }
1323  return const_cast<DeclContext*>(this)->getLexicalParent();
1324  }
1325 
1326  DeclContext *getLookupParent();
1327 
1328  const DeclContext *getLookupParent() const {
1329  return const_cast<DeclContext*>(this)->getLookupParent();
1330  }
1331 
1333  return cast<Decl>(this)->getASTContext();
1334  }
1335 
1336  bool isClosure() const {
1337  return DeclKind == Decl::Block;
1338  }
1339 
1340  bool isObjCContainer() const {
1341  switch (DeclKind) {
1342  case Decl::ObjCCategory:
1343  case Decl::ObjCCategoryImpl:
1344  case Decl::ObjCImplementation:
1345  case Decl::ObjCInterface:
1346  case Decl::ObjCProtocol:
1347  return true;
1348  }
1349  return false;
1350  }
1351 
1352  bool isFunctionOrMethod() const {
1353  switch (DeclKind) {
1354  case Decl::Block:
1355  case Decl::Captured:
1356  case Decl::ObjCMethod:
1357  return true;
1358  default:
1359  return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction;
1360  }
1361  }
1362 
1363  /// \brief Test whether the context supports looking up names.
1364  bool isLookupContext() const {
1365  return !isFunctionOrMethod() && DeclKind != Decl::LinkageSpec &&
1366  DeclKind != Decl::Export;
1367  }
1368 
1369  bool isFileContext() const {
1370  return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace;
1371  }
1372 
1373  bool isTranslationUnit() const {
1374  return DeclKind == Decl::TranslationUnit;
1375  }
1376 
1377  bool isRecord() const {
1378  return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord;
1379  }
1380 
1381  bool isNamespace() const {
1382  return DeclKind == Decl::Namespace;
1383  }
1384 
1385  bool isStdNamespace() const;
1386 
1387  bool isInlineNamespace() const;
1388 
1389  /// \brief Determines whether this context is dependent on a
1390  /// template parameter.
1391  bool isDependentContext() const;
1392 
1393  /// isTransparentContext - Determines whether this context is a
1394  /// "transparent" context, meaning that the members declared in this
1395  /// context are semantically declared in the nearest enclosing
1396  /// non-transparent (opaque) context but are lexically declared in
1397  /// this context. For example, consider the enumerators of an
1398  /// enumeration type:
1399  /// @code
1400  /// enum E {
1401  /// Val1
1402  /// };
1403  /// @endcode
1404  /// Here, E is a transparent context, so its enumerator (Val1) will
1405  /// appear (semantically) that it is in the same context of E.
1406  /// Examples of transparent contexts include: enumerations (except for
1407  /// C++0x scoped enums), and C++ linkage specifications.
1408  bool isTransparentContext() const;
1409 
1410  /// \brief Determines whether this context or some of its ancestors is a
1411  /// linkage specification context that specifies C linkage.
1412  bool isExternCContext() const;
1413 
1414  /// \brief Retrieve the nearest enclosing C linkage specification context.
1415  const LinkageSpecDecl *getExternCContext() const;
1416 
1417  /// \brief Determines whether this context or some of its ancestors is a
1418  /// linkage specification context that specifies C++ linkage.
1419  bool isExternCXXContext() const;
1420 
1421  /// \brief Determine whether this declaration context is equivalent
1422  /// to the declaration context DC.
1423  bool Equals(const DeclContext *DC) const {
1424  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1425  }
1426 
1427  /// \brief Determine whether this declaration context encloses the
1428  /// declaration context DC.
1429  bool Encloses(const DeclContext *DC) const;
1430 
1431  /// \brief Find the nearest non-closure ancestor of this context,
1432  /// i.e. the innermost semantic parent of this context which is not
1433  /// a closure. A context may be its own non-closure ancestor.
1434  Decl *getNonClosureAncestor();
1435  const Decl *getNonClosureAncestor() const {
1436  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1437  }
1438 
1439  /// getPrimaryContext - There may be many different
1440  /// declarations of the same entity (including forward declarations
1441  /// of classes, multiple definitions of namespaces, etc.), each with
1442  /// a different set of declarations. This routine returns the
1443  /// "primary" DeclContext structure, which will contain the
1444  /// information needed to perform name lookup into this context.
1445  DeclContext *getPrimaryContext();
1447  return const_cast<DeclContext*>(this)->getPrimaryContext();
1448  }
1449 
1450  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1451  /// other entities of the same name, or where it is a redeclaration if the
1452  /// two entities are compatible. This skips through transparent contexts.
1453  DeclContext *getRedeclContext();
1455  return const_cast<DeclContext *>(this)->getRedeclContext();
1456  }
1457 
1458  /// \brief Retrieve the nearest enclosing namespace context.
1459  DeclContext *getEnclosingNamespaceContext();
1461  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1462  }
1463 
1464  /// \brief Retrieve the outermost lexically enclosing record context.
1465  RecordDecl *getOuterLexicalRecordContext();
1467  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1468  }
1469 
1470  /// \brief Test if this context is part of the enclosing namespace set of
1471  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1472  /// isn't a namespace, this is equivalent to Equals().
1473  ///
1474  /// The enclosing namespace set of a namespace is the namespace and, if it is
1475  /// inline, its enclosing namespace, recursively.
1476  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1477 
1478  /// \brief Collects all of the declaration contexts that are semantically
1479  /// connected to this declaration context.
1480  ///
1481  /// For declaration contexts that have multiple semantically connected but
1482  /// syntactically distinct contexts, such as C++ namespaces, this routine
1483  /// retrieves the complete set of such declaration contexts in source order.
1484  /// For example, given:
1485  ///
1486  /// \code
1487  /// namespace N {
1488  /// int x;
1489  /// }
1490  /// namespace N {
1491  /// int y;
1492  /// }
1493  /// \endcode
1494  ///
1495  /// The \c Contexts parameter will contain both definitions of N.
1496  ///
1497  /// \param Contexts Will be cleared and set to the set of declaration
1498  /// contexts that are semanticaly connected to this declaration context,
1499  /// in source order, including this context (which may be the only result,
1500  /// for non-namespace contexts).
1501  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1502 
1503  /// decl_iterator - Iterates through the declarations stored
1504  /// within this context.
1506  /// Current - The current declaration.
1507  Decl *Current;
1508 
1509  public:
1510  typedef Decl *value_type;
1511  typedef const value_type &reference;
1512  typedef const value_type *pointer;
1513  typedef std::forward_iterator_tag iterator_category;
1515 
1516  decl_iterator() : Current(nullptr) { }
1517  explicit decl_iterator(Decl *C) : Current(C) { }
1518 
1519  reference operator*() const { return Current; }
1520  // This doesn't meet the iterator requirements, but it's convenient
1521  value_type operator->() const { return Current; }
1522 
1524  Current = Current->getNextDeclInContext();
1525  return *this;
1526  }
1527 
1529  decl_iterator tmp(*this);
1530  ++(*this);
1531  return tmp;
1532  }
1533 
1535  return x.Current == y.Current;
1536  }
1538  return x.Current != y.Current;
1539  }
1540  };
1541 
1542  typedef llvm::iterator_range<decl_iterator> decl_range;
1543 
1544  /// decls_begin/decls_end - Iterate over the declarations stored in
1545  /// this context.
1546  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1547  decl_iterator decls_begin() const;
1548  decl_iterator decls_end() const { return decl_iterator(); }
1549  bool decls_empty() const;
1550 
1551  /// noload_decls_begin/end - Iterate over the declarations stored in this
1552  /// context that are currently loaded; don't attempt to retrieve anything
1553  /// from an external source.
1554  decl_range noload_decls() const {
1555  return decl_range(noload_decls_begin(), noload_decls_end());
1556  }
1557  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
1559 
1560  /// specific_decl_iterator - Iterates over a subrange of
1561  /// declarations stored in a DeclContext, providing only those that
1562  /// are of type SpecificDecl (or a class derived from it). This
1563  /// iterator is used, for example, to provide iteration over just
1564  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
1565  template<typename SpecificDecl>
1567  /// Current - The current, underlying declaration iterator, which
1568  /// will either be NULL or will point to a declaration of
1569  /// type SpecificDecl.
1571 
1572  /// SkipToNextDecl - Advances the current position up to the next
1573  /// declaration of type SpecificDecl that also meets the criteria
1574  /// required by Acceptable.
1575  void SkipToNextDecl() {
1576  while (*Current && !isa<SpecificDecl>(*Current))
1577  ++Current;
1578  }
1579 
1580  public:
1581  typedef SpecificDecl *value_type;
1582  // TODO: Add reference and pointer typedefs (with some appropriate proxy
1583  // type) if we ever have a need for them.
1584  typedef void reference;
1585  typedef void pointer;
1586  typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1588  typedef std::forward_iterator_tag iterator_category;
1589 
1590  specific_decl_iterator() : Current() { }
1591 
1592  /// specific_decl_iterator - Construct a new iterator over a
1593  /// subset of the declarations the range [C,
1594  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1595  /// member function of SpecificDecl that should return true for
1596  /// all of the SpecificDecl instances that will be in the subset
1597  /// of iterators. For example, if you want Objective-C instance
1598  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1599  /// &ObjCMethodDecl::isInstanceMethod.
1601  SkipToNextDecl();
1602  }
1603 
1604  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1605  // This doesn't meet the iterator requirements, but it's convenient
1606  value_type operator->() const { return **this; }
1607 
1609  ++Current;
1610  SkipToNextDecl();
1611  return *this;
1612  }
1613 
1615  specific_decl_iterator tmp(*this);
1616  ++(*this);
1617  return tmp;
1618  }
1619 
1620  friend bool operator==(const specific_decl_iterator& x,
1621  const specific_decl_iterator& y) {
1622  return x.Current == y.Current;
1623  }
1624 
1625  friend bool operator!=(const specific_decl_iterator& x,
1626  const specific_decl_iterator& y) {
1627  return x.Current != y.Current;
1628  }
1629  };
1630 
1631  /// \brief Iterates over a filtered subrange of declarations stored
1632  /// in a DeclContext.
1633  ///
1634  /// This iterator visits only those declarations that are of type
1635  /// SpecificDecl (or a class derived from it) and that meet some
1636  /// additional run-time criteria. This iterator is used, for
1637  /// example, to provide access to the instance methods within an
1638  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
1639  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
1640  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
1642  /// Current - The current, underlying declaration iterator, which
1643  /// will either be NULL or will point to a declaration of
1644  /// type SpecificDecl.
1646 
1647  /// SkipToNextDecl - Advances the current position up to the next
1648  /// declaration of type SpecificDecl that also meets the criteria
1649  /// required by Acceptable.
1650  void SkipToNextDecl() {
1651  while (*Current &&
1652  (!isa<SpecificDecl>(*Current) ||
1653  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
1654  ++Current;
1655  }
1656 
1657  public:
1658  typedef SpecificDecl *value_type;
1659  // TODO: Add reference and pointer typedefs (with some appropriate proxy
1660  // type) if we ever have a need for them.
1661  typedef void reference;
1662  typedef void pointer;
1663  typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1665  typedef std::forward_iterator_tag iterator_category;
1666 
1667  filtered_decl_iterator() : Current() { }
1668 
1669  /// filtered_decl_iterator - Construct a new iterator over a
1670  /// subset of the declarations the range [C,
1671  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1672  /// member function of SpecificDecl that should return true for
1673  /// all of the SpecificDecl instances that will be in the subset
1674  /// of iterators. For example, if you want Objective-C instance
1675  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1676  /// &ObjCMethodDecl::isInstanceMethod.
1678  SkipToNextDecl();
1679  }
1680 
1681  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1682  value_type operator->() const { return cast<SpecificDecl>(*Current); }
1683 
1685  ++Current;
1686  SkipToNextDecl();
1687  return *this;
1688  }
1689 
1691  filtered_decl_iterator tmp(*this);
1692  ++(*this);
1693  return tmp;
1694  }
1695 
1696  friend bool operator==(const filtered_decl_iterator& x,
1697  const filtered_decl_iterator& y) {
1698  return x.Current == y.Current;
1699  }
1700 
1701  friend bool operator!=(const filtered_decl_iterator& x,
1702  const filtered_decl_iterator& y) {
1703  return x.Current != y.Current;
1704  }
1705  };
1706 
1707  /// @brief Add the declaration D into this context.
1708  ///
1709  /// This routine should be invoked when the declaration D has first
1710  /// been declared, to place D into the context where it was
1711  /// (lexically) defined. Every declaration must be added to one
1712  /// (and only one!) context, where it can be visited via
1713  /// [decls_begin(), decls_end()). Once a declaration has been added
1714  /// to its lexical context, the corresponding DeclContext owns the
1715  /// declaration.
1716  ///
1717  /// If D is also a NamedDecl, it will be made visible within its
1718  /// semantic context via makeDeclVisibleInContext.
1719  void addDecl(Decl *D);
1720 
1721  /// @brief Add the declaration D into this context, but suppress
1722  /// searches for external declarations with the same name.
1723  ///
1724  /// Although analogous in function to addDecl, this removes an
1725  /// important check. This is only useful if the Decl is being
1726  /// added in response to an external search; in all other cases,
1727  /// addDecl() is the right function to use.
1728  /// See the ASTImporter for use cases.
1729  void addDeclInternal(Decl *D);
1730 
1731  /// @brief Add the declaration D to this context without modifying
1732  /// any lookup tables.
1733  ///
1734  /// This is useful for some operations in dependent contexts where
1735  /// the semantic context might not be dependent; this basically
1736  /// only happens with friends.
1737  void addHiddenDecl(Decl *D);
1738 
1739  /// @brief Removes a declaration from this context.
1740  void removeDecl(Decl *D);
1741 
1742  /// @brief Checks whether a declaration is in this context.
1743  bool containsDecl(Decl *D) const;
1744 
1747 
1748  /// lookup - Find the declarations (if any) with the given Name in
1749  /// this context. Returns a range of iterators that contains all of
1750  /// the declarations with this name, with object, function, member,
1751  /// and enumerator names preceding any tag name. Note that this
1752  /// routine will not look into parent contexts.
1753  lookup_result lookup(DeclarationName Name) const;
1754 
1755  /// \brief Find the declarations with the given name that are visible
1756  /// within this context; don't attempt to retrieve anything from an
1757  /// external source.
1758  lookup_result noload_lookup(DeclarationName Name);
1759 
1760  /// \brief A simplistic name lookup mechanism that performs name lookup
1761  /// into this declaration context without consulting the external source.
1762  ///
1763  /// This function should almost never be used, because it subverts the
1764  /// usual relationship between a DeclContext and the external source.
1765  /// See the ASTImporter for the (few, but important) use cases.
1766  ///
1767  /// FIXME: This is very inefficient; replace uses of it with uses of
1768  /// noload_lookup.
1769  void localUncachedLookup(DeclarationName Name,
1770  SmallVectorImpl<NamedDecl *> &Results);
1771 
1772  /// @brief Makes a declaration visible within this context.
1773  ///
1774  /// This routine makes the declaration D visible to name lookup
1775  /// within this context and, if this is a transparent context,
1776  /// within its parent contexts up to the first enclosing
1777  /// non-transparent context. Making a declaration visible within a
1778  /// context does not transfer ownership of a declaration, and a
1779  /// declaration can be visible in many contexts that aren't its
1780  /// lexical context.
1781  ///
1782  /// If D is a redeclaration of an existing declaration that is
1783  /// visible from this context, as determined by
1784  /// NamedDecl::declarationReplaces, the previous declaration will be
1785  /// replaced with D.
1786  void makeDeclVisibleInContext(NamedDecl *D);
1787 
1788  /// all_lookups_iterator - An iterator that provides a view over the results
1789  /// of looking up every possible name.
1791 
1792  typedef llvm::iterator_range<all_lookups_iterator> lookups_range;
1793 
1794  lookups_range lookups() const;
1795  lookups_range noload_lookups() const;
1796 
1797  /// \brief Iterators over all possible lookups within this context.
1798  all_lookups_iterator lookups_begin() const;
1799  all_lookups_iterator lookups_end() const;
1800 
1801  /// \brief Iterators over all possible lookups within this context that are
1802  /// currently loaded; don't attempt to retrieve anything from an external
1803  /// source.
1804  all_lookups_iterator noload_lookups_begin() const;
1805  all_lookups_iterator noload_lookups_end() const;
1806 
1808  typedef llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
1809  std::random_access_iterator_tag,
1811  struct udir_iterator : udir_iterator_base {
1812  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
1813  UsingDirectiveDecl *operator*() const;
1814  };
1815 
1816  typedef llvm::iterator_range<udir_iterator> udir_range;
1817 
1818  udir_range using_directives() const;
1819 
1820  // These are all defined in DependentDiagnostic.h.
1822  typedef llvm::iterator_range<DeclContext::ddiag_iterator> ddiag_range;
1823 
1824  inline ddiag_range ddiags() const;
1825 
1826  // Low-level accessors
1827 
1828  /// \brief Mark that there are external lexical declarations that we need
1829  /// to include in our lookup table (and that are not available as external
1830  /// visible lookups). These extra lookup results will be found by walking
1831  /// the lexical declarations of this context. This should be used only if
1832  /// setHasExternalLexicalStorage() has been called on any decl context for
1833  /// which this is the primary context.
1835  assert(this == getPrimaryContext() &&
1836  "should only be called on primary context");
1837  HasLazyExternalLexicalLookups = true;
1838  }
1839 
1840  /// \brief Retrieve the internal representation of the lookup structure.
1841  /// This may omit some names if we are lazily building the structure.
1842  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
1843 
1844  /// \brief Ensure the lookup structure is fully-built and return it.
1845  StoredDeclsMap *buildLookup();
1846 
1847  /// \brief Whether this DeclContext has external storage containing
1848  /// additional declarations that are lexically in this context.
1849  bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; }
1850 
1851  /// \brief State whether this DeclContext has external storage for
1852  /// declarations lexically in this context.
1853  void setHasExternalLexicalStorage(bool ES = true) {
1854  ExternalLexicalStorage = ES;
1855  }
1856 
1857  /// \brief Whether this DeclContext has external storage containing
1858  /// additional declarations that are visible in this context.
1859  bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; }
1860 
1861  /// \brief State whether this DeclContext has external storage for
1862  /// declarations visible in this context.
1863  void setHasExternalVisibleStorage(bool ES = true) {
1864  ExternalVisibleStorage = ES;
1865  if (ES && LookupPtr)
1866  NeedToReconcileExternalVisibleStorage = true;
1867  }
1868 
1869  /// \brief Determine whether the given declaration is stored in the list of
1870  /// declarations lexically within this context.
1871  bool isDeclInLexicalTraversal(const Decl *D) const {
1872  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
1873  D == LastDecl);
1874  }
1875 
1876  bool setUseQualifiedLookup(bool use = true) {
1877  bool old_value = UseQualifiedLookup;
1878  UseQualifiedLookup = use;
1879  return old_value;
1880  }
1881 
1883  return UseQualifiedLookup;
1884  }
1885 
1886  static bool classof(const Decl *D);
1887  static bool classof(const DeclContext *D) { return true; }
1888 
1889  void dumpDeclContext() const;
1890  void dumpLookups() const;
1891  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
1892  bool Deserialize = false) const;
1893 
1894 private:
1895  void reconcileExternalVisibleStorage() const;
1896  bool LoadLexicalDeclsFromExternalStorage() const;
1897 
1898  /// @brief Makes a declaration visible within this context, but
1899  /// suppresses searches for external declarations with the same
1900  /// name.
1901  ///
1902  /// Analogous to makeDeclVisibleInContext, but for the exclusive
1903  /// use of addDeclInternal().
1904  void makeDeclVisibleInContextInternal(NamedDecl *D);
1905 
1906  friend class DependentDiagnostic;
1907  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
1908 
1909  void buildLookupImpl(DeclContext *DCtx, bool Internal);
1910  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1911  bool Rediscoverable);
1912  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
1913 };
1914 
1915 inline bool Decl::isTemplateParameter() const {
1916  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
1917  getKind() == TemplateTemplateParm;
1918 }
1919 
1920 // Specialization selected when ToTy is not a known subclass of DeclContext.
1921 template <class ToTy,
1922  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
1924  static const ToTy *doit(const DeclContext *Val) {
1925  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
1926  }
1927 
1928  static ToTy *doit(DeclContext *Val) {
1929  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
1930  }
1931 };
1932 
1933 // Specialization selected when ToTy is a known subclass of DeclContext.
1934 template <class ToTy>
1936  static const ToTy *doit(const DeclContext *Val) {
1937  return static_cast<const ToTy*>(Val);
1938  }
1939 
1940  static ToTy *doit(DeclContext *Val) {
1941  return static_cast<ToTy*>(Val);
1942  }
1943 };
1944 
1945 
1946 } // end clang.
1947 
1948 namespace llvm {
1949 
1950 /// isa<T>(DeclContext*)
1951 template <typename To>
1952 struct isa_impl<To, ::clang::DeclContext> {
1953  static bool doit(const ::clang::DeclContext &Val) {
1954  return To::classofKind(Val.getDeclKind());
1955  }
1956 };
1957 
1958 /// cast<T>(DeclContext*)
1959 template<class ToTy>
1960 struct cast_convert_val<ToTy,
1961  const ::clang::DeclContext,const ::clang::DeclContext> {
1962  static const ToTy &doit(const ::clang::DeclContext &Val) {
1964  }
1965 };
1966 template<class ToTy>
1967 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
1968  static ToTy &doit(::clang::DeclContext &Val) {
1970  }
1971 };
1972 template<class ToTy>
1973 struct cast_convert_val<ToTy,
1974  const ::clang::DeclContext*, const ::clang::DeclContext*> {
1975  static const ToTy *doit(const ::clang::DeclContext *Val) {
1976  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1977  }
1978 };
1979 template<class ToTy>
1980 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
1981  static ToTy *doit(::clang::DeclContext *Val) {
1982  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1983  }
1984 };
1985 
1986 /// Implement cast_convert_val for Decl -> DeclContext conversions.
1987 template<class FromTy>
1988 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
1989  static ::clang::DeclContext &doit(const FromTy &Val) {
1990  return *FromTy::castToDeclContext(&Val);
1991  }
1992 };
1993 
1994 template<class FromTy>
1995 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
1996  static ::clang::DeclContext *doit(const FromTy *Val) {
1997  return FromTy::castToDeclContext(Val);
1998  }
1999 };
2000 
2001 template<class FromTy>
2002 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2003  static const ::clang::DeclContext &doit(const FromTy &Val) {
2004  return *FromTy::castToDeclContext(&Val);
2005  }
2006 };
2007 
2008 template<class FromTy>
2009 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2010  static const ::clang::DeclContext *doit(const FromTy *Val) {
2011  return FromTy::castToDeclContext(Val);
2012  }
2013 };
2014 
2015 } // end namespace llvm
2016 
2017 #endif
const Decl * getPreviousDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:933
const value_type * pointer
Definition: DeclBase.h:881
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:1882
specific_decl_iterator & operator++()
Definition: DeclBase.h:1608
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:538
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1631
redecl_iterator operator++(int)
Definition: DeclBase.h:900
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:849
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:1557
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:737
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:914
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:231
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1588
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c.h:60
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:812
bool isClosure() const
Definition: DeclBase.h:1336
bool isLookupContext() const
Test whether the context supports looking up names.
Definition: DeclBase.h:1364
virtual Stmt * getBody() const
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: DeclBase.h:955
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:463
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:26
attr_iterator attr_begin() const
Definition: DeclBase.h:486
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:510
Stmt - This represents one statement.
Definition: Stmt.h:60
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:2964
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:314
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:882
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:81
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:47
friend bool operator==(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1620
static TemplateDecl * getDescribedTemplate(Decl *Templated)
specific_decl_iterator(DeclContext::decl_iterator C)
specific_decl_iterator - Construct a new iterator over a subset of the declarations the range [C...
Definition: DeclBase.h:1600
Not a friend object.
Definition: DeclBase.h:1070
Decl * getPreviousDecl()
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:929
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:1953
bool isObjCContainer() const
Definition: DeclBase.h:1340
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:95
bool isDeclInLexicalTraversal(const Decl *D) const
Determine whether the given declaration is stored in the list of declarations lexically within this c...
Definition: DeclBase.h:1871
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1928
SourceLocation getLocEnd() const LLVM_READONLY
Definition: DeclBase.h:403
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:1859
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:1641
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:777
static Decl * getNonClosureContext(T *D)
Starting at a given context (a Decl or DeclContext), look for a code context that is not a closure (a...
Definition: DeclBase.cpp:919
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:303
redecl_iterator & operator++()
Definition: DeclBase.h:891
reference back() const
Definition: DeclBase.h:1198
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:208
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:732
llvm::iterator_adaptor_base< iterator, ResultTy::iterator, std::random_access_iterator_tag, NamedDecl *const > IteratorBase
Definition: DeclBase.h:1171
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1546
Decl * FirstDecl
FirstDecl - The first declaration stored within this declaration context.
Definition: DeclBase.h:1268
std::ptrdiff_t difference_type
Definition: DeclBase.h:883
reference front() const
Definition: DeclBase.h:1197
bool isInvalidDecl() const
Definition: DeclBase.h:532
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1625
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:716
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:25
Decl(Kind DK, EmptyShell Empty)
Definition: DeclBase.h:368
const value_type * pointer
Definition: DeclBase.h:1512
void setHasExternalVisibleStorage(bool ES=true)
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:1863
value_type operator->() const
Definition: DeclBase.h:1521
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3384
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:80
One of these records is kept for each identifier that is lexed.
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1542
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:128
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1155
attr_iterator attr_end() const
Definition: DeclBase.h:489
specific_decl_iterator operator++(int)
Definition: DeclBase.h:1614
bool isNamespace() const
Definition: DeclBase.h:1381
SmallVector< Attr *, 4 > AttrVec
AttrVec - A vector of Attr, which is how they are stored on the AST.
Definition: AttrIterator.h:42
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:758
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:397
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:613
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:826
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:780
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1423
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:307
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:514
Describes a module or submodule.
Definition: Module.h:57
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;deprecated&#39;.
Definition: DeclBase.h:650
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1701
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1180
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:785
static void dump(llvm::raw_ostream &OS, StringRef FunctionName, ArrayRef< CounterExpression > Expressions, ArrayRef< CounterMappingRegion > Regions)
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:808
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:764
filtered_decl_iterator(DeclContext::decl_iterator C)
filtered_decl_iterator - Construct a new iterator over a subset of the declarations the range [C...
Definition: DeclBase.h:1677
static bool isStdNamespace(const DeclContext *DC)
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1202
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:1834
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1127
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:803
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:724
Represents a linkage specification.
Definition: DeclCXX.h:2687
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:1996
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:869
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:386
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:848
iterator::reference reference
Definition: DeclBase.h:1189
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:67
NodeId Parent
Definition: ASTDiff.cpp:192
Decl * getNextDeclInContext()
Definition: DeclBase.h:413
bool hasAttr() const
Definition: DeclBase.h:521
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:97
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:1554
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1328
const Decl * getNonClosureContext() const
Definition: DeclBase.h:431
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1319
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:854
static bool classofKind(Kind K)
Definition: DeclBase.h:1095
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:1816
const FunctionProtoType * T
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:1842
Decl * LastDecl
LastDecl - The last declaration stored within this declaration context.
Definition: DeclBase.h:1274
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:537
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:707
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:944
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1166
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:414
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1029
bool isFileContext() const
Definition: DeclBase.h:1369
DeclContext * getDeclContext()
Definition: DeclBase.h:416
SourceLocation Begin
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
redecl_iterator redecls_end() const
Definition: DeclBase.h:925
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1513
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:1915
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:1790
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:604
const DeclContext * getParent() const
Definition: DeclBase.h:1306
bool isFunctionOrMethod() const
Definition: DeclBase.h:1352
reference operator[](size_t N) const
Definition: DeclBase.h:1199
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1303
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:408
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1001
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:310
const SourceManager & SM
Definition: Format.cpp:1308
const DeclContext * getDeclContext() const
Definition: DeclBase.h:421
reference operator*() const
Definition: DeclBase.h:888
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1079
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:788
AttrVec & getAttrs()
Definition: DeclBase.h:466
virtual bool hasBody() const
Returns true if this Decl represents a declaration for a body of code, such as a function or method d...
Definition: DeclBase.h:961
bool hasAttrs() const
Definition: DeclBase.h:462
filtered_decl_iterator & operator++()
Definition: DeclBase.h:1684
const value_type & reference
Definition: DeclBase.h:1511
void addAttr(Attr *A)
Definition: DeclBase.h:472
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2010
Abstract interface for external sources of AST nodes.
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:400
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1297
#define false
Definition: stdbool.h:33
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:873
llvm::iterator_adaptor_base< udir_iterator, lookup_iterator, std::random_access_iterator_tag, UsingDirectiveDecl * > udir_iterator_base
Definition: DeclBase.h:1807
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:576
all_lookups_iterator - An iterator that provides a view over the results of looking up every possible...
Definition: DeclLookups.h:26
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:769
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1664
void setReferenced(bool R=true)
Definition: DeclBase.h:567
static bool classof(const DeclContext *D)
Definition: DeclBase.h:1887
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:1812
iterator::pointer pointer
Definition: DeclBase.h:1188
bool hasCachedLinkage() const
Definition: DeclBase.h:390
A friend of a previously-declared entity.
Definition: DeclBase.h:1071
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1168
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:1849
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:1989
Linkage getCachedLinkage() const
Definition: DeclBase.h:382
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:681
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:906
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:861
DeclContextLookupResult lookup_result
Definition: DeclBase.h:1745
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1940
decl_iterator noload_decls_end() const
Definition: DeclBase.h:1558
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c.h:68
Defines various enumerations that describe declaration and type specifiers.
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1505
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:565
redecl_iterator redecls_begin() const
Definition: DeclBase.h:922
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:918
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1924
Dataflow Directional Tag Classes.
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:480
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1224
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:1821
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:378
bool isTopLevelDeclInObjCContainer() const
Whether this declaration is a top-level declaration (function, global variable, etc.) that is lexically inside an objc container definition.
Definition: DeclBase.h:572
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:948
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:987
bool isRecord() const
Definition: DeclBase.h:1377
attr_range attrs() const
Definition: DeclBase.h:482
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:909
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:328
AccessSpecifier getAccess() const
Definition: DeclBase.h:451
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:110
DeclarationName - The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:410
decl_iterator operator++(int)
Definition: DeclBase.h:1528
lookup_result::iterator lookup_iterator
Definition: DeclBase.h:1746
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1435
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:752
void setHasExternalLexicalStorage(bool ES=true)
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:1853
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:1566
void setObjectOfFriendDecl(bool PerformFriendInjection=false)
Changes the namespace of this declaration to reflect that it&#39;s the object of a friend declaration...
Definition: DeclBase.h:1040
A dependently-generated diagnostic.
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it&#39;s a function-local extern declaration...
Definition: DeclBase.h:1011
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1466
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1665
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:552
static bool classof(const OMPClause *T)
static bool isFunctionOrMethod(const Decl *D)
isFunctionOrMethod - Return true if the given decl has function type (function or function-typed vari...
void setNonMemberOperator()
Specifies that this declaration is a C++ overloaded non-member.
Definition: DeclBase.h:1088
T * getAttr() const
Definition: DeclBase.h:518
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:693
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:1690
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1322
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:685
An iterator over the dependent diagnostics in a dependent context.
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:505
const value_type & reference
Definition: DeclBase.h:880
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2003
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: DeclBase.h:938
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1696
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:190
decl_iterator & operator++()
Definition: DeclBase.h:1523
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1145
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1460
value_type operator->() const
Definition: DeclBase.h:889
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1446
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:358
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:865
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:82
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1936
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1587
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1332
Defines the clang::VersionTuple class, which represents a version in the form major[.minor[.subminor]].
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:84
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:896
TranslationUnitDecl - The top declaration context.
Definition: Decl.h:80
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1089
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1534
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:458
#define true
Definition: stdbool.h:32
bool setUseQualifiedLookup(bool use=true)
Definition: DeclBase.h:1876
A trivial tuple used to represent a source range.
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:586
NamedDecl - This represents a decl with a name.
Definition: Decl.h:213
bool isTranslationUnit() const
Definition: DeclBase.h:1373
void dropAttr()
Definition: DeclBase.h:494
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:446
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:436
Represents C++ using-directive.
Definition: DeclCXX.h:2779
SourceLocation getBegin() const
This class handles loading and caching of source files into memory.
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:479
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:407
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1537
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1454
DeclContext(Decl::Kind K)
Definition: DeclBase.h:1286
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:659
decl_iterator decls_end() const
Definition: DeclBase.h:1548
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:842
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1139