clang  5.0.0
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.
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 
446  void setAccess(AccessSpecifier AS) {
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 
487  return hasAttrs() ? getAttrs().begin() : nullptr;
488  }
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.
738  return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule();
739  }
740 
741  /// \brief Determine whether this declaration might be hidden from name
742  /// lookup. Note that the declaration might be visible even if this returns
743  /// \c false, if the owning module is visible within the query context.
744  // FIXME: Rename this to make it clearer what it does.
745  bool isHidden() const {
746  return (int)getModuleOwnershipKind() > (int)ModuleOwnershipKind::Visible;
747  }
748 
749  /// Set that this declaration is globally visible, even if it came from a
750  /// module that is not visible.
752  if (isHidden())
753  setModuleOwnershipKind(ModuleOwnershipKind::Visible);
754  }
755 
756  /// \brief Get the kind of module ownership for this declaration.
758  return NextInContextAndBits.getInt();
759  }
760 
761  /// \brief Set whether this declaration is hidden from name lookup.
763  assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&
764  MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&
765  !hasLocalOwningModuleStorage()) &&
766  "no storage available for owning module for this declaration");
767  NextInContextAndBits.setInt(MOK);
768  }
769 
770  unsigned getIdentifierNamespace() const {
771  return IdentifierNamespace;
772  }
773  bool isInIdentifierNamespace(unsigned NS) const {
774  return getIdentifierNamespace() & NS;
775  }
776  static unsigned getIdentifierNamespaceForKind(Kind DK);
777 
779  return isTagIdentifierNamespace(getIdentifierNamespace());
780  }
781  static bool isTagIdentifierNamespace(unsigned NS) {
782  // TagDecls have Tag and Type set and may also have TagFriend.
783  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
784  }
785 
786  /// getLexicalDeclContext - The declaration context where this Decl was
787  /// lexically declared (LexicalDC). May be different from
788  /// getDeclContext() (SemanticDC).
789  /// e.g.:
790  ///
791  /// namespace A {
792  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
793  /// }
794  /// void A::f(); // SemanticDC == namespace 'A'
795  /// // LexicalDC == global namespace
797  if (isInSemaDC())
798  return getSemanticDC();
799  return getMultipleDC()->LexicalDC;
800  }
802  return const_cast<Decl*>(this)->getLexicalDeclContext();
803  }
804 
805  /// Determine whether this declaration is declared out of line (outside its
806  /// semantic context).
807  virtual bool isOutOfLine() const;
808 
809  /// setDeclContext - Set both the semantic and lexical DeclContext
810  /// to DC.
811  void setDeclContext(DeclContext *DC);
812 
813  void setLexicalDeclContext(DeclContext *DC);
814 
815  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
816  /// scoped decl is defined outside the current function or method. This is
817  /// roughly global variables and functions, but also handles enums (which
818  /// could be defined inside or outside a function etc).
820  return getParentFunctionOrMethod() == nullptr;
821  }
822 
823  /// \brief Returns true if this declaration lexically is inside a function.
824  /// It recognizes non-defining declarations as well as members of local
825  /// classes:
826  /// \code
827  /// void foo() { void bar(); }
828  /// void foo2() { class ABC { void bar(); }; }
829  /// \endcode
830  bool isLexicallyWithinFunctionOrMethod() const;
831 
832  /// \brief If this decl is defined inside a function/method/block it returns
833  /// the corresponding DeclContext, otherwise it returns null.
834  const DeclContext *getParentFunctionOrMethod() const;
836  return const_cast<DeclContext*>(
837  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
838  }
839 
840  /// \brief Retrieves the "canonical" declaration of the given declaration.
841  virtual Decl *getCanonicalDecl() { return this; }
842  const Decl *getCanonicalDecl() const {
843  return const_cast<Decl*>(this)->getCanonicalDecl();
844  }
845 
846  /// \brief Whether this particular Decl is a canonical one.
847  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
848 
849 protected:
850  /// \brief Returns the next redeclaration or itself if this is the only decl.
851  ///
852  /// Decl subclasses that can be redeclared should override this method so that
853  /// Decl::redecl_iterator can iterate over them.
854  virtual Decl *getNextRedeclarationImpl() { return this; }
855 
856  /// \brief Implementation of getPreviousDecl(), to be overridden by any
857  /// subclass that has a redeclaration chain.
858  virtual Decl *getPreviousDeclImpl() { return nullptr; }
859 
860  /// \brief Implementation of getMostRecentDecl(), to be overridden by any
861  /// subclass that has a redeclaration chain.
862  virtual Decl *getMostRecentDeclImpl() { return this; }
863 
864 public:
865  /// \brief Iterates through all the redeclarations of the same decl.
867  /// Current - The current declaration.
868  Decl *Current;
869  Decl *Starter;
870 
871  public:
872  typedef Decl *value_type;
873  typedef const value_type &reference;
874  typedef const value_type *pointer;
875  typedef std::forward_iterator_tag iterator_category;
877 
878  redecl_iterator() : Current(nullptr) { }
879  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) { }
880 
881  reference operator*() const { return Current; }
882  value_type operator->() const { return Current; }
883 
885  assert(Current && "Advancing while iterator has reached end");
886  // Get either previous decl or latest decl.
887  Decl *Next = Current->getNextRedeclarationImpl();
888  assert(Next && "Should return next redeclaration or itself, never null!");
889  Current = (Next != Starter) ? Next : nullptr;
890  return *this;
891  }
892 
894  redecl_iterator tmp(*this);
895  ++(*this);
896  return tmp;
897  }
898 
900  return x.Current == y.Current;
901  }
903  return x.Current != y.Current;
904  }
905  };
906 
907  typedef llvm::iterator_range<redecl_iterator> redecl_range;
908 
909  /// \brief Returns an iterator range for all the redeclarations of the same
910  /// decl. It will iterate at least once (when this decl is the only one).
912  return redecl_range(redecls_begin(), redecls_end());
913  }
914 
916  return redecl_iterator(const_cast<Decl *>(this));
917  }
919 
920  /// \brief Retrieve the previous declaration that declares the same entity
921  /// as this declaration, or NULL if there is no previous declaration.
922  Decl *getPreviousDecl() { return getPreviousDeclImpl(); }
923 
924  /// \brief Retrieve the most recent declaration that declares the same entity
925  /// as this declaration, or NULL if there is no previous declaration.
926  const Decl *getPreviousDecl() const {
927  return const_cast<Decl *>(this)->getPreviousDeclImpl();
928  }
929 
930  /// \brief True if this is the first declaration in its redeclaration chain.
931  bool isFirstDecl() const {
932  return getPreviousDecl() == nullptr;
933  }
934 
935  /// \brief Retrieve the most recent declaration that declares the same entity
936  /// as this declaration (which may be this declaration).
937  Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); }
938 
939  /// \brief Retrieve the most recent declaration that declares the same entity
940  /// as this declaration (which may be this declaration).
941  const Decl *getMostRecentDecl() const {
942  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
943  }
944 
945  /// getBody - If this Decl represents a declaration for a body of code,
946  /// such as a function or method definition, this method returns the
947  /// top-level Stmt* of that body. Otherwise this method returns null.
948  virtual Stmt* getBody() const { return nullptr; }
949 
950  /// \brief Returns true if this \c Decl represents a declaration for a body of
951  /// code, such as a function or method definition.
952  /// Note that \c hasBody can also return true if any redeclaration of this
953  /// \c Decl represents a declaration for a body of code.
954  virtual bool hasBody() const { return getBody() != nullptr; }
955 
956  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
957  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
958  SourceLocation getBodyRBrace() const;
959 
960  // global temp stats (until we have a per-module visitor)
961  static void add(Kind k);
962  static void EnableStatistics();
963  static void PrintStats();
964 
965  /// isTemplateParameter - Determines whether this declaration is a
966  /// template parameter.
967  bool isTemplateParameter() const;
968 
969  /// isTemplateParameter - Determines whether this declaration is a
970  /// template parameter pack.
971  bool isTemplateParameterPack() const;
972 
973  /// \brief Whether this declaration is a parameter pack.
974  bool isParameterPack() const;
975 
976  /// \brief returns true if this declaration is a template
977  bool isTemplateDecl() const;
978 
979  /// \brief Whether this declaration is a function or function template.
981  return (DeclKind >= Decl::firstFunction &&
982  DeclKind <= Decl::lastFunction) ||
983  DeclKind == FunctionTemplate;
984  }
985 
986  /// \brief If this is a declaration that describes some template, this
987  /// method returns that template declaration.
989 
990  /// \brief Returns the function itself, or the templated function if this is a
991  /// function template.
992  FunctionDecl *getAsFunction() LLVM_READONLY;
993 
994  const FunctionDecl *getAsFunction() const {
995  return const_cast<Decl *>(this)->getAsFunction();
996  }
997 
998  /// \brief Changes the namespace of this declaration to reflect that it's
999  /// a function-local extern declaration.
1000  ///
1001  /// These declarations appear in the lexical context of the extern
1002  /// declaration, but in the semantic context of the enclosing namespace
1003  /// scope.
1005  assert((IdentifierNamespace == IDNS_Ordinary ||
1006  IdentifierNamespace == IDNS_OrdinaryFriend) &&
1007  "namespace is not ordinary");
1008 
1009  Decl *Prev = getPreviousDecl();
1010  IdentifierNamespace &= ~IDNS_Ordinary;
1011 
1012  IdentifierNamespace |= IDNS_LocalExtern;
1013  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1014  IdentifierNamespace |= IDNS_Ordinary;
1015  }
1016 
1017  /// \brief Determine whether this is a block-scope declaration with linkage.
1018  /// This will either be a local variable declaration declared 'extern', or a
1019  /// local function declaration.
1021  return IdentifierNamespace & IDNS_LocalExtern;
1022  }
1023 
1024  /// \brief Changes the namespace of this declaration to reflect that it's
1025  /// the object of a friend declaration.
1026  ///
1027  /// These declarations appear in the lexical context of the friending
1028  /// class, but in the semantic context of the actual entity. This property
1029  /// applies only to a specific decl object; other redeclarations of the
1030  /// same entity may not (and probably don't) share this property.
1031  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1032  unsigned OldNS = IdentifierNamespace;
1033  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1034  IDNS_TagFriend | IDNS_OrdinaryFriend |
1035  IDNS_LocalExtern)) &&
1036  "namespace includes neither ordinary nor tag");
1037  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1038  IDNS_TagFriend | IDNS_OrdinaryFriend |
1039  IDNS_LocalExtern)) &&
1040  "namespace includes other than ordinary or tag");
1041 
1042  Decl *Prev = getPreviousDecl();
1043  IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type);
1044 
1045  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1046  IdentifierNamespace |= IDNS_TagFriend;
1047  if (PerformFriendInjection ||
1048  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1049  IdentifierNamespace |= IDNS_Tag | IDNS_Type;
1050  }
1051 
1052  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | IDNS_LocalExtern)) {
1053  IdentifierNamespace |= IDNS_OrdinaryFriend;
1054  if (PerformFriendInjection ||
1055  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1056  IdentifierNamespace |= IDNS_Ordinary;
1057  }
1058  }
1059 
1061  FOK_None, ///< Not a friend object.
1062  FOK_Declared, ///< A friend of a previously-declared entity.
1063  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1064  };
1065 
1066  /// \brief Determines whether this declaration is the object of a
1067  /// friend declaration and, if so, what kind.
1068  ///
1069  /// There is currently no direct way to find the associated FriendDecl.
1071  unsigned mask =
1072  (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend));
1073  if (!mask) return FOK_None;
1074  return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared
1075  : FOK_Undeclared);
1076  }
1077 
1078  /// Specifies that this declaration is a C++ overloaded non-member.
1080  assert(getKind() == Function || getKind() == FunctionTemplate);
1081  assert((IdentifierNamespace & IDNS_Ordinary) &&
1082  "visible non-member operators should be in ordinary namespace");
1083  IdentifierNamespace |= IDNS_NonMemberOperator;
1084  }
1085 
1086  static bool classofKind(Kind K) { return true; }
1087  static DeclContext *castToDeclContext(const Decl *);
1088  static Decl *castFromDeclContext(const DeclContext *);
1089 
1090  void print(raw_ostream &Out, unsigned Indentation = 0,
1091  bool PrintInstantiation = false) const;
1092  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1093  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1094  static void printGroup(Decl** Begin, unsigned NumDecls,
1095  raw_ostream &Out, const PrintingPolicy &Policy,
1096  unsigned Indentation = 0);
1097  // Debuggers don't usually respect default arguments.
1098  void dump() const;
1099  // Same as dump(), but forces color printing.
1100  void dumpColor() const;
1101  void dump(raw_ostream &Out, bool Deserialize = false) const;
1102 
1103  /// \brief Looks through the Decl's underlying type to extract a FunctionType
1104  /// when possible. Will return null if the type underlying the Decl does not
1105  /// have a FunctionType.
1106  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1107 
1108 private:
1109  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1110  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1111  ASTContext &Ctx);
1112 
1113 protected:
1114  ASTMutationListener *getASTMutationListener() const;
1115 };
1116 
1117 /// \brief Determine whether two declarations declare the same entity.
1118 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1119  if (!D1 || !D2)
1120  return false;
1121 
1122  if (D1 == D2)
1123  return true;
1124 
1125  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1126 }
1127 
1128 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1129 /// doing something to a specific decl.
1130 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1131  const Decl *TheDecl;
1132  SourceLocation Loc;
1133  SourceManager &SM;
1134  const char *Message;
1135 public:
1137  SourceManager &sm, const char *Msg)
1138  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1139 
1140  void print(raw_ostream &OS) const override;
1141 };
1142 
1143 /// \brief The results of name lookup within a DeclContext. This is either a
1144 /// single result (with no stable storage) or a collection of results (with
1145 /// stable storage provided by the lookup table).
1148  ResultTy Result;
1149  // If there is only one lookup result, it would be invalidated by
1150  // reallocations of the name table, so store it separately.
1151  NamedDecl *Single;
1152 
1153  static NamedDecl *const SingleElementDummyList;
1154 
1155 public:
1156  DeclContextLookupResult() : Result(), Single() {}
1158  : Result(Result), Single() {}
1160  : Result(SingleElementDummyList), Single(Single) {}
1161 
1162  class iterator;
1163  typedef llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1164  std::random_access_iterator_tag,
1165  NamedDecl *const> IteratorBase;
1166  class iterator : public IteratorBase {
1167  value_type SingleElement;
1168 
1169  public:
1170  iterator() : IteratorBase(), SingleElement() {}
1171  explicit iterator(pointer Pos, value_type Single = nullptr)
1172  : IteratorBase(Pos), SingleElement(Single) {}
1173 
1175  return SingleElement ? SingleElement : IteratorBase::operator*();
1176  }
1177  };
1179  typedef iterator::pointer pointer;
1180  typedef iterator::reference reference;
1181 
1182  iterator begin() const { return iterator(Result.begin(), Single); }
1183  iterator end() const { return iterator(Result.end(), Single); }
1184 
1185  bool empty() const { return Result.empty(); }
1186  pointer data() const { return Single ? &Single : Result.data(); }
1187  size_t size() const { return Single ? 1 : Result.size(); }
1188  reference front() const { return Single ? Single : Result.front(); }
1189  reference back() const { return Single ? Single : Result.back(); }
1190  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1191 
1192  // FIXME: Remove this from the interface
1193  DeclContextLookupResult slice(size_t N) const {
1194  DeclContextLookupResult Sliced = Result.slice(N);
1195  Sliced.Single = Single;
1196  return Sliced;
1197  }
1198 };
1199 
1200 /// DeclContext - This is used only as base class of specific decl types that
1201 /// can act as declaration contexts. These decls are (only the top classes
1202 /// that directly derive from DeclContext are mentioned, not their subclasses):
1203 ///
1204 /// TranslationUnitDecl
1205 /// NamespaceDecl
1206 /// FunctionDecl
1207 /// TagDecl
1208 /// ObjCMethodDecl
1209 /// ObjCContainerDecl
1210 /// LinkageSpecDecl
1211 /// ExportDecl
1212 /// BlockDecl
1213 /// OMPDeclareReductionDecl
1214 ///
1216  /// DeclKind - This indicates which class this is.
1217  unsigned DeclKind : 8;
1218 
1219  /// \brief Whether this declaration context also has some external
1220  /// storage that contains additional declarations that are lexically
1221  /// part of this context.
1222  mutable bool ExternalLexicalStorage : 1;
1223 
1224  /// \brief Whether this declaration context also has some external
1225  /// storage that contains additional declarations that are visible
1226  /// in this context.
1227  mutable bool ExternalVisibleStorage : 1;
1228 
1229  /// \brief Whether this declaration context has had external visible
1230  /// storage added since the last lookup. In this case, \c LookupPtr's
1231  /// invariant may not hold and needs to be fixed before we perform
1232  /// another lookup.
1233  mutable bool NeedToReconcileExternalVisibleStorage : 1;
1234 
1235  /// \brief If \c true, this context may have local lexical declarations
1236  /// that are missing from the lookup table.
1237  mutable bool HasLazyLocalLexicalLookups : 1;
1238 
1239  /// \brief If \c true, the external source may have lexical declarations
1240  /// that are missing from the lookup table.
1241  mutable bool HasLazyExternalLexicalLookups : 1;
1242 
1243  /// \brief If \c true, lookups should only return identifier from
1244  /// DeclContext scope (for example TranslationUnit). Used in
1245  /// LookupQualifiedName()
1246  mutable bool UseQualifiedLookup : 1;
1247 
1248  /// \brief Pointer to the data structure used to lookup declarations
1249  /// within this context (or a DependentStoredDeclsMap if this is a
1250  /// dependent context). We maintain the invariant that, if the map
1251  /// contains an entry for a DeclarationName (and we haven't lazily
1252  /// omitted anything), then it contains all relevant entries for that
1253  /// name (modulo the hasExternalDecls() flag).
1254  mutable StoredDeclsMap *LookupPtr;
1255 
1256 protected:
1257  /// FirstDecl - The first declaration stored within this declaration
1258  /// context.
1259  mutable Decl *FirstDecl;
1260 
1261  /// LastDecl - The last declaration stored within this declaration
1262  /// context. FIXME: We could probably cache this value somewhere
1263  /// outside of the DeclContext, to reduce the size of DeclContext by
1264  /// another pointer.
1265  mutable Decl *LastDecl;
1266 
1267  friend class ExternalASTSource;
1268  friend class ASTDeclReader;
1269  friend class ASTWriter;
1270 
1271  /// \brief Build up a chain of declarations.
1272  ///
1273  /// \returns the first/last pair of declarations.
1274  static std::pair<Decl *, Decl *>
1275  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1276 
1278  : DeclKind(K), ExternalLexicalStorage(false),
1279  ExternalVisibleStorage(false),
1280  NeedToReconcileExternalVisibleStorage(false),
1281  HasLazyLocalLexicalLookups(false), HasLazyExternalLexicalLookups(false),
1282  UseQualifiedLookup(false),
1283  LookupPtr(nullptr), FirstDecl(nullptr), LastDecl(nullptr) {}
1284 
1285 public:
1286  ~DeclContext();
1287 
1289  return static_cast<Decl::Kind>(DeclKind);
1290  }
1291  const char *getDeclKindName() const;
1292 
1293  /// getParent - Returns the containing DeclContext.
1295  return cast<Decl>(this)->getDeclContext();
1296  }
1297  const DeclContext *getParent() const {
1298  return const_cast<DeclContext*>(this)->getParent();
1299  }
1300 
1301  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1302  /// different from getParent, e.g.:
1303  ///
1304  /// namespace A {
1305  /// struct S;
1306  /// }
1307  /// struct A::S {}; // getParent() == namespace 'A'
1308  /// // getLexicalParent() == translation unit
1309  ///
1311  return cast<Decl>(this)->getLexicalDeclContext();
1312  }
1314  return const_cast<DeclContext*>(this)->getLexicalParent();
1315  }
1316 
1318 
1319  const DeclContext *getLookupParent() const {
1320  return const_cast<DeclContext*>(this)->getLookupParent();
1321  }
1322 
1324  return cast<Decl>(this)->getASTContext();
1325  }
1326 
1327  bool isClosure() const {
1328  return DeclKind == Decl::Block;
1329  }
1330 
1331  bool isObjCContainer() const {
1332  switch (DeclKind) {
1333  case Decl::ObjCCategory:
1334  case Decl::ObjCCategoryImpl:
1335  case Decl::ObjCImplementation:
1336  case Decl::ObjCInterface:
1337  case Decl::ObjCProtocol:
1338  return true;
1339  }
1340  return false;
1341  }
1342 
1343  bool isFunctionOrMethod() const {
1344  switch (DeclKind) {
1345  case Decl::Block:
1346  case Decl::Captured:
1347  case Decl::ObjCMethod:
1348  return true;
1349  default:
1350  return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction;
1351  }
1352  }
1353 
1354  /// \brief Test whether the context supports looking up names.
1355  bool isLookupContext() const {
1356  return !isFunctionOrMethod() && DeclKind != Decl::LinkageSpec &&
1357  DeclKind != Decl::Export;
1358  }
1359 
1360  bool isFileContext() const {
1361  return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace;
1362  }
1363 
1364  bool isTranslationUnit() const {
1365  return DeclKind == Decl::TranslationUnit;
1366  }
1367 
1368  bool isRecord() const {
1369  return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord;
1370  }
1371 
1372  bool isNamespace() const {
1373  return DeclKind == Decl::Namespace;
1374  }
1375 
1376  bool isStdNamespace() const;
1377 
1378  bool isInlineNamespace() const;
1379 
1380  /// \brief Determines whether this context is dependent on a
1381  /// template parameter.
1382  bool isDependentContext() const;
1383 
1384  /// isTransparentContext - Determines whether this context is a
1385  /// "transparent" context, meaning that the members declared in this
1386  /// context are semantically declared in the nearest enclosing
1387  /// non-transparent (opaque) context but are lexically declared in
1388  /// this context. For example, consider the enumerators of an
1389  /// enumeration type:
1390  /// @code
1391  /// enum E {
1392  /// Val1
1393  /// };
1394  /// @endcode
1395  /// Here, E is a transparent context, so its enumerator (Val1) will
1396  /// appear (semantically) that it is in the same context of E.
1397  /// Examples of transparent contexts include: enumerations (except for
1398  /// C++0x scoped enums), and C++ linkage specifications.
1399  bool isTransparentContext() const;
1400 
1401  /// \brief Determines whether this context or some of its ancestors is a
1402  /// linkage specification context that specifies C linkage.
1403  bool isExternCContext() const;
1404 
1405  /// \brief Retrieve the nearest enclosing C linkage specification context.
1406  const LinkageSpecDecl *getExternCContext() const;
1407 
1408  /// \brief Determines whether this context or some of its ancestors is a
1409  /// linkage specification context that specifies C++ linkage.
1410  bool isExternCXXContext() const;
1411 
1412  /// \brief Determine whether this declaration context is equivalent
1413  /// to the declaration context DC.
1414  bool Equals(const DeclContext *DC) const {
1415  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1416  }
1417 
1418  /// \brief Determine whether this declaration context encloses the
1419  /// declaration context DC.
1420  bool Encloses(const DeclContext *DC) const;
1421 
1422  /// \brief Find the nearest non-closure ancestor of this context,
1423  /// i.e. the innermost semantic parent of this context which is not
1424  /// a closure. A context may be its own non-closure ancestor.
1426  const Decl *getNonClosureAncestor() const {
1427  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1428  }
1429 
1430  /// getPrimaryContext - There may be many different
1431  /// declarations of the same entity (including forward declarations
1432  /// of classes, multiple definitions of namespaces, etc.), each with
1433  /// a different set of declarations. This routine returns the
1434  /// "primary" DeclContext structure, which will contain the
1435  /// information needed to perform name lookup into this context.
1438  return const_cast<DeclContext*>(this)->getPrimaryContext();
1439  }
1440 
1441  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1442  /// other entities of the same name, or where it is a redeclaration if the
1443  /// two entities are compatible. This skips through transparent contexts.
1446  return const_cast<DeclContext *>(this)->getRedeclContext();
1447  }
1448 
1449  /// \brief Retrieve the nearest enclosing namespace context.
1452  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1453  }
1454 
1455  /// \brief Retrieve the outermost lexically enclosing record context.
1458  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1459  }
1460 
1461  /// \brief Test if this context is part of the enclosing namespace set of
1462  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1463  /// isn't a namespace, this is equivalent to Equals().
1464  ///
1465  /// The enclosing namespace set of a namespace is the namespace and, if it is
1466  /// inline, its enclosing namespace, recursively.
1467  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1468 
1469  /// \brief Collects all of the declaration contexts that are semantically
1470  /// connected to this declaration context.
1471  ///
1472  /// For declaration contexts that have multiple semantically connected but
1473  /// syntactically distinct contexts, such as C++ namespaces, this routine
1474  /// retrieves the complete set of such declaration contexts in source order.
1475  /// For example, given:
1476  ///
1477  /// \code
1478  /// namespace N {
1479  /// int x;
1480  /// }
1481  /// namespace N {
1482  /// int y;
1483  /// }
1484  /// \endcode
1485  ///
1486  /// The \c Contexts parameter will contain both definitions of N.
1487  ///
1488  /// \param Contexts Will be cleared and set to the set of declaration
1489  /// contexts that are semanticaly connected to this declaration context,
1490  /// in source order, including this context (which may be the only result,
1491  /// for non-namespace contexts).
1493 
1494  /// decl_iterator - Iterates through the declarations stored
1495  /// within this context.
1497  /// Current - The current declaration.
1498  Decl *Current;
1499 
1500  public:
1501  typedef Decl *value_type;
1502  typedef const value_type &reference;
1503  typedef const value_type *pointer;
1504  typedef std::forward_iterator_tag iterator_category;
1506 
1507  decl_iterator() : Current(nullptr) { }
1508  explicit decl_iterator(Decl *C) : Current(C) { }
1509 
1510  reference operator*() const { return Current; }
1511  // This doesn't meet the iterator requirements, but it's convenient
1512  value_type operator->() const { return Current; }
1513 
1515  Current = Current->getNextDeclInContext();
1516  return *this;
1517  }
1518 
1520  decl_iterator tmp(*this);
1521  ++(*this);
1522  return tmp;
1523  }
1524 
1526  return x.Current == y.Current;
1527  }
1529  return x.Current != y.Current;
1530  }
1531  };
1532 
1533  typedef llvm::iterator_range<decl_iterator> decl_range;
1534 
1535  /// decls_begin/decls_end - Iterate over the declarations stored in
1536  /// this context.
1538  decl_iterator decls_begin() const;
1539  decl_iterator decls_end() const { return decl_iterator(); }
1540  bool decls_empty() const;
1541 
1542  /// noload_decls_begin/end - Iterate over the declarations stored in this
1543  /// context that are currently loaded; don't attempt to retrieve anything
1544  /// from an external source.
1547  }
1550 
1551  /// specific_decl_iterator - Iterates over a subrange of
1552  /// declarations stored in a DeclContext, providing only those that
1553  /// are of type SpecificDecl (or a class derived from it). This
1554  /// iterator is used, for example, to provide iteration over just
1555  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
1556  template<typename SpecificDecl>
1558  /// Current - The current, underlying declaration iterator, which
1559  /// will either be NULL or will point to a declaration of
1560  /// type SpecificDecl.
1562 
1563  /// SkipToNextDecl - Advances the current position up to the next
1564  /// declaration of type SpecificDecl that also meets the criteria
1565  /// required by Acceptable.
1566  void SkipToNextDecl() {
1567  while (*Current && !isa<SpecificDecl>(*Current))
1568  ++Current;
1569  }
1570 
1571  public:
1572  typedef SpecificDecl *value_type;
1573  // TODO: Add reference and pointer typedefs (with some appropriate proxy
1574  // type) if we ever have a need for them.
1575  typedef void reference;
1576  typedef void pointer;
1577  typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1579  typedef std::forward_iterator_tag iterator_category;
1580 
1581  specific_decl_iterator() : Current() { }
1582 
1583  /// specific_decl_iterator - Construct a new iterator over a
1584  /// subset of the declarations the range [C,
1585  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1586  /// member function of SpecificDecl that should return true for
1587  /// all of the SpecificDecl instances that will be in the subset
1588  /// of iterators. For example, if you want Objective-C instance
1589  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1590  /// &ObjCMethodDecl::isInstanceMethod.
1592  SkipToNextDecl();
1593  }
1594 
1595  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1596  // This doesn't meet the iterator requirements, but it's convenient
1597  value_type operator->() const { return **this; }
1598 
1600  ++Current;
1601  SkipToNextDecl();
1602  return *this;
1603  }
1604 
1606  specific_decl_iterator tmp(*this);
1607  ++(*this);
1608  return tmp;
1609  }
1610 
1611  friend bool operator==(const specific_decl_iterator& x,
1612  const specific_decl_iterator& y) {
1613  return x.Current == y.Current;
1614  }
1615 
1616  friend bool operator!=(const specific_decl_iterator& x,
1617  const specific_decl_iterator& y) {
1618  return x.Current != y.Current;
1619  }
1620  };
1621 
1622  /// \brief Iterates over a filtered subrange of declarations stored
1623  /// in a DeclContext.
1624  ///
1625  /// This iterator visits only those declarations that are of type
1626  /// SpecificDecl (or a class derived from it) and that meet some
1627  /// additional run-time criteria. This iterator is used, for
1628  /// example, to provide access to the instance methods within an
1629  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
1630  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
1631  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
1633  /// Current - The current, underlying declaration iterator, which
1634  /// will either be NULL or will point to a declaration of
1635  /// type SpecificDecl.
1637 
1638  /// SkipToNextDecl - Advances the current position up to the next
1639  /// declaration of type SpecificDecl that also meets the criteria
1640  /// required by Acceptable.
1641  void SkipToNextDecl() {
1642  while (*Current &&
1643  (!isa<SpecificDecl>(*Current) ||
1644  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
1645  ++Current;
1646  }
1647 
1648  public:
1649  typedef SpecificDecl *value_type;
1650  // TODO: Add reference and pointer typedefs (with some appropriate proxy
1651  // type) if we ever have a need for them.
1652  typedef void reference;
1653  typedef void pointer;
1654  typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1656  typedef std::forward_iterator_tag iterator_category;
1657 
1658  filtered_decl_iterator() : Current() { }
1659 
1660  /// filtered_decl_iterator - Construct a new iterator over a
1661  /// subset of the declarations the range [C,
1662  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1663  /// member function of SpecificDecl that should return true for
1664  /// all of the SpecificDecl instances that will be in the subset
1665  /// of iterators. For example, if you want Objective-C instance
1666  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1667  /// &ObjCMethodDecl::isInstanceMethod.
1669  SkipToNextDecl();
1670  }
1671 
1672  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1673  value_type operator->() const { return cast<SpecificDecl>(*Current); }
1674 
1676  ++Current;
1677  SkipToNextDecl();
1678  return *this;
1679  }
1680 
1682  filtered_decl_iterator tmp(*this);
1683  ++(*this);
1684  return tmp;
1685  }
1686 
1687  friend bool operator==(const filtered_decl_iterator& x,
1688  const filtered_decl_iterator& y) {
1689  return x.Current == y.Current;
1690  }
1691 
1692  friend bool operator!=(const filtered_decl_iterator& x,
1693  const filtered_decl_iterator& y) {
1694  return x.Current != y.Current;
1695  }
1696  };
1697 
1698  /// @brief Add the declaration D into this context.
1699  ///
1700  /// This routine should be invoked when the declaration D has first
1701  /// been declared, to place D into the context where it was
1702  /// (lexically) defined. Every declaration must be added to one
1703  /// (and only one!) context, where it can be visited via
1704  /// [decls_begin(), decls_end()). Once a declaration has been added
1705  /// to its lexical context, the corresponding DeclContext owns the
1706  /// declaration.
1707  ///
1708  /// If D is also a NamedDecl, it will be made visible within its
1709  /// semantic context via makeDeclVisibleInContext.
1710  void addDecl(Decl *D);
1711 
1712  /// @brief Add the declaration D into this context, but suppress
1713  /// searches for external declarations with the same name.
1714  ///
1715  /// Although analogous in function to addDecl, this removes an
1716  /// important check. This is only useful if the Decl is being
1717  /// added in response to an external search; in all other cases,
1718  /// addDecl() is the right function to use.
1719  /// See the ASTImporter for use cases.
1720  void addDeclInternal(Decl *D);
1721 
1722  /// @brief Add the declaration D to this context without modifying
1723  /// any lookup tables.
1724  ///
1725  /// This is useful for some operations in dependent contexts where
1726  /// the semantic context might not be dependent; this basically
1727  /// only happens with friends.
1728  void addHiddenDecl(Decl *D);
1729 
1730  /// @brief Removes a declaration from this context.
1731  void removeDecl(Decl *D);
1732 
1733  /// @brief Checks whether a declaration is in this context.
1734  bool containsDecl(Decl *D) const;
1735 
1738 
1739  /// lookup - Find the declarations (if any) with the given Name in
1740  /// this context. Returns a range of iterators that contains all of
1741  /// the declarations with this name, with object, function, member,
1742  /// and enumerator names preceding any tag name. Note that this
1743  /// routine will not look into parent contexts.
1745 
1746  /// \brief Find the declarations with the given name that are visible
1747  /// within this context; don't attempt to retrieve anything from an
1748  /// external source.
1750 
1751  /// \brief A simplistic name lookup mechanism that performs name lookup
1752  /// into this declaration context without consulting the external source.
1753  ///
1754  /// This function should almost never be used, because it subverts the
1755  /// usual relationship between a DeclContext and the external source.
1756  /// See the ASTImporter for the (few, but important) use cases.
1757  ///
1758  /// FIXME: This is very inefficient; replace uses of it with uses of
1759  /// noload_lookup.
1761  SmallVectorImpl<NamedDecl *> &Results);
1762 
1763  /// @brief Makes a declaration visible within this context.
1764  ///
1765  /// This routine makes the declaration D visible to name lookup
1766  /// within this context and, if this is a transparent context,
1767  /// within its parent contexts up to the first enclosing
1768  /// non-transparent context. Making a declaration visible within a
1769  /// context does not transfer ownership of a declaration, and a
1770  /// declaration can be visible in many contexts that aren't its
1771  /// lexical context.
1772  ///
1773  /// If D is a redeclaration of an existing declaration that is
1774  /// visible from this context, as determined by
1775  /// NamedDecl::declarationReplaces, the previous declaration will be
1776  /// replaced with D.
1778 
1779  /// all_lookups_iterator - An iterator that provides a view over the results
1780  /// of looking up every possible name.
1782 
1783  typedef llvm::iterator_range<all_lookups_iterator> lookups_range;
1784 
1785  lookups_range lookups() const;
1786  lookups_range noload_lookups() const;
1787 
1788  /// \brief Iterators over all possible lookups within this context.
1791 
1792  /// \brief Iterators over all possible lookups within this context that are
1793  /// currently loaded; don't attempt to retrieve anything from an external
1794  /// source.
1797 
1799  typedef llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
1800  std::random_access_iterator_tag,
1804  UsingDirectiveDecl *operator*() const;
1805  };
1806 
1807  typedef llvm::iterator_range<udir_iterator> udir_range;
1808 
1809  udir_range using_directives() const;
1810 
1811  // These are all defined in DependentDiagnostic.h.
1813  typedef llvm::iterator_range<DeclContext::ddiag_iterator> ddiag_range;
1814 
1815  inline ddiag_range ddiags() const;
1816 
1817  // Low-level accessors
1818 
1819  /// \brief Mark that there are external lexical declarations that we need
1820  /// to include in our lookup table (and that are not available as external
1821  /// visible lookups). These extra lookup results will be found by walking
1822  /// the lexical declarations of this context. This should be used only if
1823  /// setHasExternalLexicalStorage() has been called on any decl context for
1824  /// which this is the primary context.
1826  assert(this == getPrimaryContext() &&
1827  "should only be called on primary context");
1828  HasLazyExternalLexicalLookups = true;
1829  }
1830 
1831  /// \brief Retrieve the internal representation of the lookup structure.
1832  /// This may omit some names if we are lazily building the structure.
1833  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
1834 
1835  /// \brief Ensure the lookup structure is fully-built and return it.
1837 
1838  /// \brief Whether this DeclContext has external storage containing
1839  /// additional declarations that are lexically in this context.
1840  bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; }
1841 
1842  /// \brief State whether this DeclContext has external storage for
1843  /// declarations lexically in this context.
1844  void setHasExternalLexicalStorage(bool ES = true) {
1845  ExternalLexicalStorage = ES;
1846  }
1847 
1848  /// \brief Whether this DeclContext has external storage containing
1849  /// additional declarations that are visible in this context.
1850  bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; }
1851 
1852  /// \brief State whether this DeclContext has external storage for
1853  /// declarations visible in this context.
1854  void setHasExternalVisibleStorage(bool ES = true) {
1855  ExternalVisibleStorage = ES;
1856  if (ES && LookupPtr)
1857  NeedToReconcileExternalVisibleStorage = true;
1858  }
1859 
1860  /// \brief Determine whether the given declaration is stored in the list of
1861  /// declarations lexically within this context.
1862  bool isDeclInLexicalTraversal(const Decl *D) const {
1863  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
1864  D == LastDecl);
1865  }
1866 
1867  bool setUseQualifiedLookup(bool use = true) {
1868  bool old_value = UseQualifiedLookup;
1869  UseQualifiedLookup = use;
1870  return old_value;
1871  }
1872 
1874  return UseQualifiedLookup;
1875  }
1876 
1877  static bool classof(const Decl *D);
1878  static bool classof(const DeclContext *D) { return true; }
1879 
1880  void dumpDeclContext() const;
1881  void dumpLookups() const;
1882  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
1883  bool Deserialize = false) const;
1884 
1885 private:
1886  void reconcileExternalVisibleStorage() const;
1887  bool LoadLexicalDeclsFromExternalStorage() const;
1888 
1889  /// @brief Makes a declaration visible within this context, but
1890  /// suppresses searches for external declarations with the same
1891  /// name.
1892  ///
1893  /// Analogous to makeDeclVisibleInContext, but for the exclusive
1894  /// use of addDeclInternal().
1895  void makeDeclVisibleInContextInternal(NamedDecl *D);
1896 
1897  friend class DependentDiagnostic;
1898  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
1899 
1900  void buildLookupImpl(DeclContext *DCtx, bool Internal);
1901  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1902  bool Rediscoverable);
1903  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
1904 };
1905 
1906 inline bool Decl::isTemplateParameter() const {
1907  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
1908  getKind() == TemplateTemplateParm;
1909 }
1910 
1911 // Specialization selected when ToTy is not a known subclass of DeclContext.
1912 template <class ToTy,
1913  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
1915  static const ToTy *doit(const DeclContext *Val) {
1916  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
1917  }
1918 
1919  static ToTy *doit(DeclContext *Val) {
1920  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
1921  }
1922 };
1923 
1924 // Specialization selected when ToTy is a known subclass of DeclContext.
1925 template <class ToTy>
1927  static const ToTy *doit(const DeclContext *Val) {
1928  return static_cast<const ToTy*>(Val);
1929  }
1930 
1931  static ToTy *doit(DeclContext *Val) {
1932  return static_cast<ToTy*>(Val);
1933  }
1934 };
1935 
1936 
1937 } // end clang.
1938 
1939 namespace llvm {
1940 
1941 /// isa<T>(DeclContext*)
1942 template <typename To>
1943 struct isa_impl<To, ::clang::DeclContext> {
1944  static bool doit(const ::clang::DeclContext &Val) {
1945  return To::classofKind(Val.getDeclKind());
1946  }
1947 };
1948 
1949 /// cast<T>(DeclContext*)
1950 template<class ToTy>
1951 struct cast_convert_val<ToTy,
1952  const ::clang::DeclContext,const ::clang::DeclContext> {
1953  static const ToTy &doit(const ::clang::DeclContext &Val) {
1955  }
1956 };
1957 template<class ToTy>
1958 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
1959  static ToTy &doit(::clang::DeclContext &Val) {
1961  }
1962 };
1963 template<class ToTy>
1964 struct cast_convert_val<ToTy,
1965  const ::clang::DeclContext*, const ::clang::DeclContext*> {
1966  static const ToTy *doit(const ::clang::DeclContext *Val) {
1967  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1968  }
1969 };
1970 template<class ToTy>
1971 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
1972  static ToTy *doit(::clang::DeclContext *Val) {
1973  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1974  }
1975 };
1976 
1977 /// Implement cast_convert_val for Decl -> DeclContext conversions.
1978 template<class FromTy>
1979 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
1980  static ::clang::DeclContext &doit(const FromTy &Val) {
1981  return *FromTy::castToDeclContext(&Val);
1982  }
1983 };
1984 
1985 template<class FromTy>
1986 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
1987  static ::clang::DeclContext *doit(const FromTy *Val) {
1988  return FromTy::castToDeclContext(Val);
1989  }
1990 };
1991 
1992 template<class FromTy>
1993 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
1994  static const ::clang::DeclContext &doit(const FromTy &Val) {
1995  return *FromTy::castToDeclContext(&Val);
1996  }
1997 };
1998 
1999 template<class FromTy>
2000 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2001  static const ::clang::DeclContext *doit(const FromTy *Val) {
2002  return FromTy::castToDeclContext(Val);
2003  }
2004 };
2005 
2006 } // end namespace llvm
2007 
2008 #endif
decl_iterator noload_decls_end() const
Definition: DeclBase.h:1549
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:732
SourceLocation getEnd() const
const value_type * pointer
Definition: DeclBase.h:874
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1319
ddiag_range ddiags() const
specific_decl_iterator & operator++()
Definition: DeclBase.h:1599
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:1618
redecl_iterator operator++(int)
Definition: DeclBase.h:893
bool isTransparentContext() const
isTransparentContext - Determines whether this context is a "transparent" context, meaning that the members declared in this context are semantically declared in the nearest enclosing non-transparent (opaque) context but are lexically declared in this context.
Definition: DeclBase.cpp:1041
iterator begin() const
Definition: DeclBase.h:1182
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:1906
UsingDirectiveDecl * operator*() const
Definition: DeclBase.cpp:1782
bool isObjCContainer() const
Definition: DeclBase.h:1331
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:907
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
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:510
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1579
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked 'unavailable'.
Definition: DeclBase.h:659
__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:813
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:463
redecl_iterator redecls_end() const
Definition: DeclBase.h:918
Stmt - This represents one statement.
Definition: Stmt.h:60
bool isExternCContext() const
Determines whether this context or some of its ancestors is a linkage specification context that spec...
Definition: DeclBase.cpp:1060
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1537
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:2923
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:875
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:1611
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:1591
Not a friend object.
Definition: DeclBase.h:1061
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:922
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:745
bool isStdNamespace() const
Definition: DeclBase.cpp:993
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1009
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:565
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:1833
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:94
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1919
SourceLocation getLocEnd() const LLVM_READONLY
Definition: DeclBase.h:403
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:1632
void localUncachedLookup(DeclarationName Name, SmallVectorImpl< NamedDecl * > &Results)
A simplistic name lookup mechanism that performs name lookup into this declaration context without co...
Definition: DeclBase.cpp:1597
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:920
redecl_iterator & operator++()
Definition: DeclBase.h:884
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:208
bool decls_empty() const
Definition: DeclBase.cpp:1312
llvm::iterator_adaptor_base< iterator, ResultTy::iterator, std::random_access_iterator_tag, NamedDecl *const > IteratorBase
Definition: DeclBase.h:1162
AccessSpecifier getAccess() const
Definition: DeclBase.h:451
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:414
Decl * FirstDecl
FirstDecl - The first declaration stored within this declaration context.
Definition: DeclBase.h:1259
std::ptrdiff_t difference_type
Definition: DeclBase.h:876
udir_range using_directives() const
Returns iterator range [First, Last) of UsingDirectiveDecls stored within this context.
Definition: DeclBase.cpp:1788
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1457
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:757
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1616
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
decl_iterator decls_end() const
Definition: DeclBase.h:1539
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:1503
void setHasExternalVisibleStorage(bool ES=true)
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:1854
void removeDecl(Decl *D)
Removes a declaration from this context.
Definition: DeclBase.cpp:1324
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3354
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.
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:1862
bool hasAttr() const
Definition: DeclBase.h:521
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1533
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:1146
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:1840
specific_decl_iterator operator++(int)
Definition: DeclBase.h:1605
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:773
SmallVector< Attr *, 4 > AttrVec
AttrVec - A vector of Attr, which is how they are stored on the AST.
Definition: AttrIterator.h:42
all_lookups_iterator lookups_end() const
Definition: DeclLookups.h:88
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:751
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:770
bool isTranslationUnit() const
Definition: DeclBase.h:1364
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 isInlineNamespace() const
Definition: DeclBase.cpp:988
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
static std::pair< Decl *, Decl * > BuildDeclChain(ArrayRef< Decl * > Decls, bool FieldsAlreadyLoaded)
Build up a chain of declarations.
Definition: DeclBase.cpp:1173
Describes a module or submodule.
Definition: Module.h:57
T * getAttr() const
Definition: DeclBase.h:518
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1692
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1171
lookups_range noload_lookups() const
Definition: DeclLookups.h:92
DeclContext * getEnclosingNamespaceContext()
Retrieve the nearest enclosing namespace context.
Definition: DeclBase.cpp:1642
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:537
static void dump(llvm::raw_ostream &OS, StringRef FunctionName, ArrayRef< CounterExpression > Expressions, ArrayRef< CounterMappingRegion > Regions)
StoredDeclsMap * buildLookup()
Ensure the lookup structure is fully-built and return it.
Definition: DeclBase.cpp:1445
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:1668
bool containsDecl(Decl *D) const
Checks whether a declaration is in this context.
Definition: DeclBase.cpp:1319
value_type operator->() const
Definition: DeclBase.h:1512
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:1825
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1118
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:941
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:796
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:724
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:716
Represents a linkage specification.
Definition: DeclCXX.h:2666
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1306
detail::InMemoryDirectory::const_iterator I
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:1987
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:862
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:841
iterator::reference reference
Definition: DeclBase.h:1180
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:980
void addDeclInternal(Decl *D)
Add the declaration D into this context, but suppress searches for external declarations with the sam...
Definition: DeclBase.cpp:1404
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:67
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:514
Decl * getNextDeclInContext()
Definition: DeclBase.h:413
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:97
bool isNamespace() const
Definition: DeclBase.h:1372
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:1545
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:693
lookups_range lookups() const
Definition: DeclLookups.h:71
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1310
const char * getDeclKindName() const
Definition: DeclBase.cpp:134
bool isLookupContext() const
Test whether the context supports looking up names.
Definition: DeclBase.h:1355
static bool classofKind(Kind K)
Definition: DeclBase.h:1086
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:1807
bool Encloses(const DeclContext *DC) const
Determine whether this declaration context encloses the declaration context DC.
Definition: DeclBase.cpp:1080
const LinkageSpecDecl * getExternCContext() const
Retrieve the nearest enclosing C linkage specification context.
Definition: DeclBase.cpp:1064
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1323
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
Decl * LastDecl
LastDecl - The last declaration stored within this declaration context.
Definition: DeclBase.h:1265
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:937
Kind getKind() const
Definition: DeclBase.h:410
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1020
DeclContext * getDeclContext()
Definition: DeclBase.h:416
bool isClosure() const
Definition: DeclBase.h:1327
lookup_result noload_lookup(DeclarationName Name)
Find the declarations with the given name that are visible within this context; don't attempt to retr...
Definition: DeclBase.cpp:1569
SourceLocation Begin
Decl * getNonClosureAncestor()
Find the nearest non-closure ancestor of this context, i.e.
Definition: DeclBase.cpp:944
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1504
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:1781
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:604
redecl_iterator redecls_begin() const
Definition: DeclBase.h:915
bool isFunctionOrMethod() const
Definition: DeclBase.h:1343
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1294
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:707
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:681
const Decl * getNonClosureContext() const
Definition: DeclBase.h:431
value_type operator->() const
Definition: DeclBase.h:882
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1193
void setLocation(SourceLocation L)
Definition: DeclBase.h:408
all_lookups_iterator lookups_begin() const
Iterators over all possible lookups within this context.
Definition: DeclLookups.h:84
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1426
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:781
AttrVec & getAttrs()
Definition: DeclBase.h:466
filtered_decl_iterator & operator++()
Definition: DeclBase.h:1675
const value_type & reference
Definition: DeclBase.h:1502
void addAttr(Attr *A)
Definition: DeclBase.h:472
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2001
Abstract interface for external sources of AST nodes.
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:400
reference operator*() const
Definition: DeclBase.h:1510
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1679
#define false
Definition: stdbool.h:33
Kind
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:778
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:866
SmallVectorImpl< AnnotatedLine * >::const_iterator Next
llvm::iterator_adaptor_base< udir_iterator, lookup_iterator, std::random_access_iterator_tag, UsingDirectiveDecl * > udir_iterator_base
Definition: DeclBase.h:1798
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:762
bool InEnclosingNamespaceSetOf(const DeclContext *NS) const
Test if this context is part of the enclosing namespace set of the context NS, as defined in C++0x [n...
Definition: DeclBase.cpp:1661
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1655
reference operator*() const
Definition: DeclBase.h:881
const std::string ID
reference front() const
Definition: DeclBase.h:1188
attr_range attrs() const
Definition: DeclBase.h:482
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:1548
void setReferenced(bool R=true)
Definition: DeclBase.h:567
static bool classof(const DeclContext *D)
Definition: DeclBase.h:1878
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1451
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:1803
iterator::pointer pointer
Definition: DeclBase.h:1179
all_lookups_iterator noload_lookups_end() const
Definition: DeclLookups.h:109
A friend of a previously-declared entity.
Definition: DeclBase.h:1062
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:948
void print(raw_ostream &OS) const override
Definition: DeclBase.cpp:237
all_lookups_iterator noload_lookups_begin() const
Iterators over all possible lookups within this context that are currently loaded; don't attempt to r...
Definition: DeclLookups.h:104
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1159
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:1980
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:386
Linkage getCachedLinkage() const
Definition: DeclBase.h:382
SourceLocation getBegin() const
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1507
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:899
bool isFileContext() const
Definition: DeclBase.h:1360
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:854
DeclContextLookupResult lookup_result
Definition: DeclBase.h:1736
bool hasCachedLinkage() const
Definition: DeclBase.h:390
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1931
bool isExternCXXContext() const
Determines whether this context or some of its ancestors is a linkage specification context that spec...
Definition: DeclBase.cpp:1076
__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:1496
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:911
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:1944
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1915
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:1215
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:1812
StringRef Name
Definition: USRFinder.cpp:123
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:378
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:847
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:1873
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
bool isInvalidDecl() const
Definition: DeclBase.h:532
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:902
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:328
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:926
reference back() const
Definition: DeclBase.h:1189
RecordDecl * getOuterLexicalRecordContext()
Retrieve the outermost lexically enclosing record context.
Definition: DeclBase.cpp:1650
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:110
DeclarationName - The name of a declaration.
decl_iterator operator++(int)
Definition: DeclBase.h:1519
lookup_result::iterator lookup_iterator
Definition: DeclBase.h:1737
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:819
bool hasAttrs() const
Definition: DeclBase.h:462
attr_iterator attr_end() const
Definition: DeclBase.h:489
void setHasExternalLexicalStorage(bool ES=true)
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:1844
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:1557
void setObjectOfFriendDecl(bool PerformFriendInjection=false)
Changes the namespace of this declaration to reflect that it's the object of a friend declaration...
Definition: DeclBase.h:1031
SmallVector< Context, 8 > Contexts
A dependently-generated diagnostic.
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it's a function-local extern declaration...
Definition: DeclBase.h:1004
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:801
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1656
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:552
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:436
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1288
void setNonMemberOperator()
Specifies that this declaration is a C++ overloaded non-member.
Definition: DeclBase.h:1079
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:1681
Module * getOwningModule() const
Get the module that owns this declaration.
Definition: DeclBase.h:737
An iterator over the dependent diagnostics in a dependent context.
DeclContext * getRedeclContext()
getRedeclContext - Retrieve the context in which an entity conflicts with other entities of the same ...
Definition: DeclBase.cpp:1634
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1070
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1396
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:458
reference operator[](size_t N) const
Definition: DeclBase.h:1190
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1313
const value_type & reference
Definition: DeclBase.h:873
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:842
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:1994
FormatToken * Current
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1687
ObjCDeclQualifier
ObjCDeclQualifier - 'Qualifiers' written next to the return and parameter types in method declaration...
Definition: DeclBase.h:190
decl_iterator & operator++()
Definition: DeclBase.h:1514
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1136
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:505
void addHiddenDecl(Decl *D)
Add the declaration D to this context without modifying any lookup tables.
Definition: DeclBase.cpp:1370
const DeclContext * getDeclContext() const
Definition: DeclBase.h:421
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:858
void dumpDeclContext() const
DeclContext * getLookupParent()
Find the parent context of this context that will be used for unqualified name lookup.
Definition: DeclBase.cpp:978
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:1927
static bool classof(const Decl *D)
Definition: DeclBase.cpp:952
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1578
Defines the clang::VersionTuple class, which represents a version in the form major[.minor[.subminor]].
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1414
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:84
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:897
bool isRecord() const
Definition: DeclBase.h:1368
TranslationUnitDecl - The top declaration context.
Definition: Decl.h:80
const DeclContext * getParent() const
Definition: DeclBase.h:1297
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1090
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1525
attr_iterator attr_begin() const
Definition: DeclBase.h:486
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:685
DeclContextLookupResult(ArrayRef< NamedDecl * > Result)
Definition: DeclBase.h:1157
#define true
Definition: stdbool.h:32
bool setUseQualifiedLookup(bool use=true)
Definition: DeclBase.h:1867
A trivial tuple used to represent a source range.
SourceLocation getLocation() const
Definition: DeclBase.h:407
NamedDecl - This represents a decl with a name.
Definition: Decl.h:213
void dropAttr()
Definition: DeclBase.h:494
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: DeclBase.h:931
void collectAllContexts(SmallVectorImpl< DeclContext * > &Contexts)
Collects all of the declaration contexts that are semantically connected to this declaration context...
Definition: DeclBase.cpp:1156
Represents C++ using-directive.
Definition: DeclCXX.h:2758
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:954
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1437
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:586
This class handles loading and caching of source files into memory.
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1445
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:479
Attr - This represents one attribute.
Definition: Attr.h:43
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1528
DeclContext(Decl::Kind K)
Definition: DeclBase.h:1277
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked 'deprecated'.
Definition: DeclBase.h:650
void dumpLookups() const
Definition: ASTDumper.cpp:2550
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:835
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1130
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:1850