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DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the Decl and DeclContext interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_AST_DECLBASE_H
15 #define LLVM_CLANG_AST_DECLBASE_H
16 
17 #include "clang/AST/AttrIterator.h"
19 #include "clang/Basic/LLVM.h"
21 #include "clang/Basic/Specifiers.h"
22 #include "llvm/ADT/ArrayRef.h"
23 #include "llvm/ADT/PointerIntPair.h"
24 #include "llvm/ADT/PointerUnion.h"
25 #include "llvm/ADT/iterator.h"
26 #include "llvm/ADT/iterator_range.h"
27 #include "llvm/Support/Casting.h"
28 #include "llvm/Support/Compiler.h"
29 #include "llvm/Support/PrettyStackTrace.h"
30 #include "llvm/Support/VersionTuple.h"
31 #include <algorithm>
32 #include <cassert>
33 #include <cstddef>
34 #include <iterator>
35 #include <string>
36 #include <type_traits>
37 #include <utility>
38 
39 namespace clang {
40 
41 class ASTContext;
42 class ASTMutationListener;
43 class Attr;
44 class DeclContext;
45 class ExternalSourceSymbolAttr;
46 class FunctionDecl;
47 class FunctionType;
48 class IdentifierInfo;
49 enum Linkage : unsigned char;
50 class LinkageSpecDecl;
51 class Module;
52 class NamedDecl;
53 class ObjCCategoryDecl;
54 class ObjCCategoryImplDecl;
55 class ObjCContainerDecl;
56 class ObjCImplDecl;
57 class ObjCImplementationDecl;
58 class ObjCInterfaceDecl;
59 class ObjCMethodDecl;
60 class ObjCProtocolDecl;
61 struct PrintingPolicy;
62 class RecordDecl;
63 class SourceManager;
64 class Stmt;
65 class StoredDeclsMap;
66 class TemplateDecl;
67 class TranslationUnitDecl;
68 class UsingDirectiveDecl;
69 
70 /// Captures the result of checking the availability of a
71 /// declaration.
77 };
78 
79 /// Decl - This represents one declaration (or definition), e.g. a variable,
80 /// typedef, function, struct, etc.
81 ///
82 /// Note: There are objects tacked on before the *beginning* of Decl
83 /// (and its subclasses) in its Decl::operator new(). Proper alignment
84 /// of all subclasses (not requiring more than the alignment of Decl) is
85 /// asserted in DeclBase.cpp.
86 class LLVM_ALIGNAS(/*alignof(uint64_t)*/ 8) Decl {
87 public:
88  /// Lists the kind of concrete classes of Decl.
89  enum Kind {
90 #define DECL(DERIVED, BASE) DERIVED,
91 #define ABSTRACT_DECL(DECL)
92 #define DECL_RANGE(BASE, START, END) \
93  first##BASE = START, last##BASE = END,
94 #define LAST_DECL_RANGE(BASE, START, END) \
95  first##BASE = START, last##BASE = END
96 #include "clang/AST/DeclNodes.inc"
97  };
98 
99  /// A placeholder type used to construct an empty shell of a
100  /// decl-derived type that will be filled in later (e.g., by some
101  /// deserialization method).
102  struct EmptyShell {};
103 
104  /// IdentifierNamespace - The different namespaces in which
105  /// declarations may appear. According to C99 6.2.3, there are
106  /// four namespaces, labels, tags, members and ordinary
107  /// identifiers. C++ describes lookup completely differently:
108  /// certain lookups merely "ignore" certain kinds of declarations,
109  /// usually based on whether the declaration is of a type, etc.
110  ///
111  /// These are meant as bitmasks, so that searches in
112  /// C++ can look into the "tag" namespace during ordinary lookup.
113  ///
114  /// Decl currently provides 15 bits of IDNS bits.
116  /// Labels, declared with 'x:' and referenced with 'goto x'.
117  IDNS_Label = 0x0001,
118 
119  /// Tags, declared with 'struct foo;' and referenced with
120  /// 'struct foo'. All tags are also types. This is what
121  /// elaborated-type-specifiers look for in C.
122  /// This also contains names that conflict with tags in the
123  /// same scope but that are otherwise ordinary names (non-type
124  /// template parameters and indirect field declarations).
125  IDNS_Tag = 0x0002,
126 
127  /// Types, declared with 'struct foo', typedefs, etc.
128  /// This is what elaborated-type-specifiers look for in C++,
129  /// but note that it's ill-formed to find a non-tag.
130  IDNS_Type = 0x0004,
131 
132  /// Members, declared with object declarations within tag
133  /// definitions. In C, these can only be found by "qualified"
134  /// lookup in member expressions. In C++, they're found by
135  /// normal lookup.
136  IDNS_Member = 0x0008,
137 
138  /// Namespaces, declared with 'namespace foo {}'.
139  /// Lookup for nested-name-specifiers find these.
140  IDNS_Namespace = 0x0010,
141 
142  /// Ordinary names. In C, everything that's not a label, tag,
143  /// member, or function-local extern ends up here.
144  IDNS_Ordinary = 0x0020,
145 
146  /// Objective C \@protocol.
147  IDNS_ObjCProtocol = 0x0040,
148 
149  /// This declaration is a friend function. A friend function
150  /// declaration is always in this namespace but may also be in
151  /// IDNS_Ordinary if it was previously declared.
152  IDNS_OrdinaryFriend = 0x0080,
153 
154  /// This declaration is a friend class. A friend class
155  /// declaration is always in this namespace but may also be in
156  /// IDNS_Tag|IDNS_Type if it was previously declared.
157  IDNS_TagFriend = 0x0100,
158 
159  /// This declaration is a using declaration. A using declaration
160  /// *introduces* a number of other declarations into the current
161  /// scope, and those declarations use the IDNS of their targets,
162  /// but the actual using declarations go in this namespace.
163  IDNS_Using = 0x0200,
164 
165  /// This declaration is a C++ operator declared in a non-class
166  /// context. All such operators are also in IDNS_Ordinary.
167  /// C++ lexical operator lookup looks for these.
168  IDNS_NonMemberOperator = 0x0400,
169 
170  /// This declaration is a function-local extern declaration of a
171  /// variable or function. This may also be IDNS_Ordinary if it
172  /// has been declared outside any function. These act mostly like
173  /// invisible friend declarations, but are also visible to unqualified
174  /// lookup within the scope of the declaring function.
175  IDNS_LocalExtern = 0x0800,
176 
177  /// This declaration is an OpenMP user defined reduction construction.
178  IDNS_OMPReduction = 0x1000
179  };
180 
181  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
182  /// parameter types in method declarations. Other than remembering
183  /// them and mangling them into the method's signature string, these
184  /// are ignored by the compiler; they are consumed by certain
185  /// remote-messaging frameworks.
186  ///
187  /// in, inout, and out are mutually exclusive and apply only to
188  /// method parameters. bycopy and byref are mutually exclusive and
189  /// apply only to method parameters (?). oneway applies only to
190  /// results. All of these expect their corresponding parameter to
191  /// have a particular type. None of this is currently enforced by
192  /// clang.
193  ///
194  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
196  OBJC_TQ_None = 0x0,
197  OBJC_TQ_In = 0x1,
198  OBJC_TQ_Inout = 0x2,
199  OBJC_TQ_Out = 0x4,
200  OBJC_TQ_Bycopy = 0x8,
201  OBJC_TQ_Byref = 0x10,
202  OBJC_TQ_Oneway = 0x20,
203 
204  /// The nullability qualifier is set when the nullability of the
205  /// result or parameter was expressed via a context-sensitive
206  /// keyword.
207  OBJC_TQ_CSNullability = 0x40
208  };
209 
210  /// The kind of ownership a declaration has, for visibility purposes.
211  /// This enumeration is designed such that higher values represent higher
212  /// levels of name hiding.
213  enum class ModuleOwnershipKind : unsigned {
214  /// This declaration is not owned by a module.
215  Unowned,
216 
217  /// This declaration has an owning module, but is globally visible
218  /// (typically because its owning module is visible and we know that
219  /// modules cannot later become hidden in this compilation).
220  /// After serialization and deserialization, this will be converted
221  /// to VisibleWhenImported.
222  Visible,
223 
224  /// This declaration has an owning module, and is visible when that
225  /// module is imported.
226  VisibleWhenImported,
227 
228  /// This declaration has an owning module, but is only visible to
229  /// lookups that occur within that module.
230  ModulePrivate
231  };
232 
233 protected:
234  /// The next declaration within the same lexical
235  /// DeclContext. These pointers form the linked list that is
236  /// traversed via DeclContext's decls_begin()/decls_end().
237  ///
238  /// The extra two bits are used for the ModuleOwnershipKind.
239  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
240 
241 private:
242  friend class DeclContext;
243 
244  struct MultipleDC {
245  DeclContext *SemanticDC;
246  DeclContext *LexicalDC;
247  };
248 
249  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
250  /// For declarations that don't contain C++ scope specifiers, it contains
251  /// the DeclContext where the Decl was declared.
252  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
253  /// with the context where it semantically belongs (SemanticDC) and the
254  /// context where it was lexically declared (LexicalDC).
255  /// e.g.:
256  ///
257  /// namespace A {
258  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
259  /// }
260  /// void A::f(); // SemanticDC == namespace 'A'
261  /// // LexicalDC == global namespace
262  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
263 
264  bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
265  bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
266 
267  MultipleDC *getMultipleDC() const {
268  return DeclCtx.get<MultipleDC*>();
269  }
270 
271  DeclContext *getSemanticDC() const {
272  return DeclCtx.get<DeclContext*>();
273  }
274 
275  /// Loc - The location of this decl.
276  SourceLocation Loc;
277 
278  /// DeclKind - This indicates which class this is.
279  unsigned DeclKind : 7;
280 
281  /// InvalidDecl - This indicates a semantic error occurred.
282  unsigned InvalidDecl : 1;
283 
284  /// HasAttrs - This indicates whether the decl has attributes or not.
285  unsigned HasAttrs : 1;
286 
287  /// Implicit - Whether this declaration was implicitly generated by
288  /// the implementation rather than explicitly written by the user.
289  unsigned Implicit : 1;
290 
291  /// Whether this declaration was "used", meaning that a definition is
292  /// required.
293  unsigned Used : 1;
294 
295  /// Whether this declaration was "referenced".
296  /// The difference with 'Used' is whether the reference appears in a
297  /// evaluated context or not, e.g. functions used in uninstantiated templates
298  /// are regarded as "referenced" but not "used".
299  unsigned Referenced : 1;
300 
301  /// Whether this declaration is a top-level declaration (function,
302  /// global variable, etc.) that is lexically inside an objc container
303  /// definition.
304  unsigned TopLevelDeclInObjCContainer : 1;
305 
306  /// Whether statistic collection is enabled.
307  static bool StatisticsEnabled;
308 
309 protected:
310  friend class ASTDeclReader;
311  friend class ASTDeclWriter;
312  friend class ASTImporter;
313  friend class ASTReader;
314  friend class CXXClassMemberWrapper;
315  friend class LinkageComputer;
316  template<typename decl_type> friend class Redeclarable;
317 
318  /// Access - Used by C++ decls for the access specifier.
319  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
320  unsigned Access : 2;
321 
322  /// Whether this declaration was loaded from an AST file.
323  unsigned FromASTFile : 1;
324 
325  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
326  unsigned IdentifierNamespace : 13;
327 
328  /// If 0, we have not computed the linkage of this declaration.
329  /// Otherwise, it is the linkage + 1.
330  mutable unsigned CacheValidAndLinkage : 3;
331 
332  /// Allocate memory for a deserialized declaration.
333  ///
334  /// This routine must be used to allocate memory for any declaration that is
335  /// deserialized from a module file.
336  ///
337  /// \param Size The size of the allocated object.
338  /// \param Ctx The context in which we will allocate memory.
339  /// \param ID The global ID of the deserialized declaration.
340  /// \param Extra The amount of extra space to allocate after the object.
341  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
342  std::size_t Extra = 0);
343 
344  /// Allocate memory for a non-deserialized declaration.
345  void *operator new(std::size_t Size, const ASTContext &Ctx,
346  DeclContext *Parent, std::size_t Extra = 0);
347 
348 private:
349  bool AccessDeclContextSanity() const;
350 
351  /// Get the module ownership kind to use for a local lexical child of \p DC,
352  /// which may be either a local or (rarely) an imported declaration.
353  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
354  if (DC) {
355  auto *D = cast<Decl>(DC);
356  auto MOK = D->getModuleOwnershipKind();
357  if (MOK != ModuleOwnershipKind::Unowned &&
358  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
359  return MOK;
360  // If D is not local and we have no local module storage, then we don't
361  // need to track module ownership at all.
362  }
363  return ModuleOwnershipKind::Unowned;
364  }
365 
366 protected:
368  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
369  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), 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  Decl(Kind DK, EmptyShell Empty)
378  : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
379  Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
380  Access(AS_none), FromASTFile(0),
381  IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
382  CacheValidAndLinkage(0) {
383  if (StatisticsEnabled) add(DK);
384  }
385 
386  virtual ~Decl();
387 
388  /// Update a potentially out-of-date declaration.
389  void updateOutOfDate(IdentifierInfo &II) const;
390 
392  return Linkage(CacheValidAndLinkage - 1);
393  }
394 
395  void setCachedLinkage(Linkage L) const {
396  CacheValidAndLinkage = L + 1;
397  }
398 
399  bool hasCachedLinkage() const {
400  return CacheValidAndLinkage;
401  }
402 
403 public:
404  /// Source range that this declaration covers.
405  virtual SourceRange getSourceRange() const LLVM_READONLY {
406  return SourceRange(getLocation(), getLocation());
407  }
408 
409  SourceLocation getLocStart() const LLVM_READONLY {
410  return getSourceRange().getBegin();
411  }
412 
413  SourceLocation getLocEnd() const LLVM_READONLY {
414  return getSourceRange().getEnd();
415  }
416 
417  SourceLocation getLocation() const { return Loc; }
418  void setLocation(SourceLocation L) { Loc = L; }
419 
420  Kind getKind() const { return static_cast<Kind>(DeclKind); }
421  const char *getDeclKindName() const;
422 
423  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
424  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
425 
427  if (isInSemaDC())
428  return getSemanticDC();
429  return getMultipleDC()->SemanticDC;
430  }
431  const DeclContext *getDeclContext() const {
432  return const_cast<Decl*>(this)->getDeclContext();
433  }
434 
435  /// Find the innermost non-closure ancestor of this declaration,
436  /// walking up through blocks, lambdas, etc. If that ancestor is
437  /// not a code context (!isFunctionOrMethod()), returns null.
438  ///
439  /// A declaration may be its own non-closure context.
441  const Decl *getNonClosureContext() const {
442  return const_cast<Decl*>(this)->getNonClosureContext();
443  }
444 
445  TranslationUnitDecl *getTranslationUnitDecl();
447  return const_cast<Decl*>(this)->getTranslationUnitDecl();
448  }
449 
450  bool isInAnonymousNamespace() const;
451 
452  bool isInStdNamespace() const;
453 
454  ASTContext &getASTContext() const LLVM_READONLY;
455 
457  Access = AS;
458  assert(AccessDeclContextSanity());
459  }
460 
462  assert(AccessDeclContextSanity());
463  return AccessSpecifier(Access);
464  }
465 
466  /// Retrieve the access specifier for this declaration, even though
467  /// it may not yet have been properly set.
469  return AccessSpecifier(Access);
470  }
471 
472  bool hasAttrs() const { return HasAttrs; }
473 
474  void setAttrs(const AttrVec& Attrs) {
475  return setAttrsImpl(Attrs, getASTContext());
476  }
477 
479  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
480  }
481 
482  const AttrVec &getAttrs() const;
483  void dropAttrs();
484 
485  void addAttr(Attr *A) {
486  if (hasAttrs())
487  getAttrs().push_back(A);
488  else
489  setAttrs(AttrVec(1, A));
490  }
491 
492  using attr_iterator = AttrVec::const_iterator;
493  using attr_range = llvm::iterator_range<attr_iterator>;
494 
495  attr_range attrs() const {
496  return attr_range(attr_begin(), attr_end());
497  }
498 
500  return hasAttrs() ? getAttrs().begin() : nullptr;
501  }
503  return hasAttrs() ? getAttrs().end() : nullptr;
504  }
505 
506  template <typename T>
507  void dropAttr() {
508  if (!HasAttrs) return;
509 
510  AttrVec &Vec = getAttrs();
511  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
512 
513  if (Vec.empty())
514  HasAttrs = false;
515  }
516 
517  template <typename T>
518  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
519  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
520  }
521 
522  template <typename T>
524  return specific_attr_iterator<T>(attr_begin());
525  }
526 
527  template <typename T>
529  return specific_attr_iterator<T>(attr_end());
530  }
531 
532  template<typename T> T *getAttr() const {
533  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
534  }
535 
536  template<typename T> bool hasAttr() const {
537  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
538  }
539 
540  /// getMaxAlignment - return the maximum alignment specified by attributes
541  /// on this decl, 0 if there are none.
542  unsigned getMaxAlignment() const;
543 
544  /// setInvalidDecl - Indicates the Decl had a semantic error. This
545  /// allows for graceful error recovery.
546  void setInvalidDecl(bool Invalid = true);
547  bool isInvalidDecl() const { return (bool) InvalidDecl; }
548 
549  /// isImplicit - Indicates whether the declaration was implicitly
550  /// generated by the implementation. If false, this declaration
551  /// was written explicitly in the source code.
552  bool isImplicit() const { return Implicit; }
553  void setImplicit(bool I = true) { Implicit = I; }
554 
555  /// Whether *any* (re-)declaration of the entity was used, meaning that
556  /// a definition is required.
557  ///
558  /// \param CheckUsedAttr When true, also consider the "used" attribute
559  /// (in addition to the "used" bit set by \c setUsed()) when determining
560  /// whether the function is used.
561  bool isUsed(bool CheckUsedAttr = true) const;
562 
563  /// Set whether the declaration is used, in the sense of odr-use.
564  ///
565  /// This should only be used immediately after creating a declaration.
566  /// It intentionally doesn't notify any listeners.
567  void setIsUsed() { getCanonicalDecl()->Used = true; }
568 
569  /// Mark the declaration used, in the sense of odr-use.
570  ///
571  /// This notifies any mutation listeners in addition to setting a bit
572  /// indicating the declaration is used.
573  void markUsed(ASTContext &C);
574 
575  /// Whether any declaration of this entity was referenced.
576  bool isReferenced() const;
577 
578  /// Whether this declaration was referenced. This should not be relied
579  /// upon for anything other than debugging.
580  bool isThisDeclarationReferenced() const { return Referenced; }
581 
582  void setReferenced(bool R = true) { Referenced = R; }
583 
584  /// Whether this declaration is a top-level declaration (function,
585  /// global variable, etc.) that is lexically inside an objc container
586  /// definition.
588  return TopLevelDeclInObjCContainer;
589  }
590 
591  void setTopLevelDeclInObjCContainer(bool V = true) {
592  TopLevelDeclInObjCContainer = V;
593  }
594 
595  /// Looks on this and related declarations for an applicable
596  /// external source symbol attribute.
597  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
598 
599  /// Whether this declaration was marked as being private to the
600  /// module in which it was defined.
601  bool isModulePrivate() const {
602  return getModuleOwnershipKind() == ModuleOwnershipKind::ModulePrivate;
603  }
604 
605  /// Whether this declaration is exported (by virtue of being lexically
606  /// within an ExportDecl or by being a NamespaceDecl).
607  bool isExported() const;
608 
609  /// Return true if this declaration has an attribute which acts as
610  /// definition of the entity, such as 'alias' or 'ifunc'.
611  bool hasDefiningAttr() const;
612 
613  /// Return this declaration's defining attribute if it has one.
614  const Attr *getDefiningAttr() const;
615 
616 protected:
617  /// Specify that this declaration was marked as being private
618  /// to the module in which it was defined.
620  // The module-private specifier has no effect on unowned declarations.
621  // FIXME: We should track this in some way for source fidelity.
622  if (getModuleOwnershipKind() == ModuleOwnershipKind::Unowned)
623  return;
624  setModuleOwnershipKind(ModuleOwnershipKind::ModulePrivate);
625  }
626 
627  /// Set the owning module ID.
628  void setOwningModuleID(unsigned ID) {
629  assert(isFromASTFile() && "Only works on a deserialized declaration");
630  *((unsigned*)this - 2) = ID;
631  }
632 
633 public:
634  /// Determine the availability of the given declaration.
635  ///
636  /// This routine will determine the most restrictive availability of
637  /// the given declaration (e.g., preferring 'unavailable' to
638  /// 'deprecated').
639  ///
640  /// \param Message If non-NULL and the result is not \c
641  /// AR_Available, will be set to a (possibly empty) message
642  /// describing why the declaration has not been introduced, is
643  /// deprecated, or is unavailable.
644  ///
645  /// \param EnclosingVersion The version to compare with. If empty, assume the
646  /// deployment target version.
647  ///
648  /// \param RealizedPlatform If non-NULL and the availability result is found
649  /// in an available attribute it will set to the platform which is written in
650  /// the available attribute.
652  getAvailability(std::string *Message = nullptr,
653  VersionTuple EnclosingVersion = VersionTuple(),
654  StringRef *RealizedPlatform = nullptr) const;
655 
656  /// Retrieve the version of the target platform in which this
657  /// declaration was introduced.
658  ///
659  /// \returns An empty version tuple if this declaration has no 'introduced'
660  /// availability attributes, or the version tuple that's specified in the
661  /// attribute otherwise.
662  VersionTuple getVersionIntroduced() const;
663 
664  /// Determine whether this declaration is marked 'deprecated'.
665  ///
666  /// \param Message If non-NULL and the declaration is deprecated,
667  /// this will be set to the message describing why the declaration
668  /// was deprecated (which may be empty).
669  bool isDeprecated(std::string *Message = nullptr) const {
670  return getAvailability(Message) == AR_Deprecated;
671  }
672 
673  /// Determine whether this declaration is marked 'unavailable'.
674  ///
675  /// \param Message If non-NULL and the declaration is unavailable,
676  /// this will be set to the message describing why the declaration
677  /// was made unavailable (which may be empty).
678  bool isUnavailable(std::string *Message = nullptr) const {
679  return getAvailability(Message) == AR_Unavailable;
680  }
681 
682  /// Determine whether this is a weak-imported symbol.
683  ///
684  /// Weak-imported symbols are typically marked with the
685  /// 'weak_import' attribute, but may also be marked with an
686  /// 'availability' attribute where we're targing a platform prior to
687  /// the introduction of this feature.
688  bool isWeakImported() const;
689 
690  /// Determines whether this symbol can be weak-imported,
691  /// e.g., whether it would be well-formed to add the weak_import
692  /// attribute.
693  ///
694  /// \param IsDefinition Set to \c true to indicate that this
695  /// declaration cannot be weak-imported because it has a definition.
696  bool canBeWeakImported(bool &IsDefinition) const;
697 
698  /// Determine whether this declaration came from an AST file (such as
699  /// a precompiled header or module) rather than having been parsed.
700  bool isFromASTFile() const { return FromASTFile; }
701 
702  /// Retrieve the global declaration ID associated with this
703  /// declaration, which specifies where this Decl was loaded from.
704  unsigned getGlobalID() const {
705  if (isFromASTFile())
706  return *((const unsigned*)this - 1);
707  return 0;
708  }
709 
710  /// Retrieve the global ID of the module that owns this particular
711  /// declaration.
712  unsigned getOwningModuleID() const {
713  if (isFromASTFile())
714  return *((const unsigned*)this - 2);
715  return 0;
716  }
717 
718 private:
719  Module *getOwningModuleSlow() const;
720 
721 protected:
722  bool hasLocalOwningModuleStorage() const;
723 
724 public:
725  /// Get the imported owning module, if this decl is from an imported
726  /// (non-local) module.
728  if (!isFromASTFile() || !hasOwningModule())
729  return nullptr;
730 
731  return getOwningModuleSlow();
732  }
733 
734  /// Get the local owning module, if known. Returns nullptr if owner is
735  /// not yet known or declaration is not from a module.
737  if (isFromASTFile() || !hasOwningModule())
738  return nullptr;
739 
740  assert(hasLocalOwningModuleStorage() &&
741  "owned local decl but no local module storage");
742  return reinterpret_cast<Module *const *>(this)[-1];
743  }
745  assert(!isFromASTFile() && hasOwningModule() &&
746  hasLocalOwningModuleStorage() &&
747  "should not have a cached owning module");
748  reinterpret_cast<Module **>(this)[-1] = M;
749  }
750 
751  /// Is this declaration owned by some module?
752  bool hasOwningModule() const {
753  return getModuleOwnershipKind() != ModuleOwnershipKind::Unowned;
754  }
755 
756  /// Get the module that owns this declaration (for visibility purposes).
758  return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule();
759  }
760 
761  /// Get the module that owns this declaration for linkage purposes.
762  /// There only ever is such a module under the C++ Modules TS.
763  ///
764  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
765  /// all declarations in a global module fragment are unowned.
766  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
767 
768  /// Determine whether this declaration might be hidden from name
769  /// lookup. Note that the declaration might be visible even if this returns
770  /// \c false, if the owning module is visible within the query context.
771  // FIXME: Rename this to make it clearer what it does.
772  bool isHidden() const {
773  return (int)getModuleOwnershipKind() > (int)ModuleOwnershipKind::Visible;
774  }
775 
776  /// Set that this declaration is globally visible, even if it came from a
777  /// module that is not visible.
779  if (isHidden())
780  setModuleOwnershipKind(ModuleOwnershipKind::Visible);
781  }
782 
783  /// Get the kind of module ownership for this declaration.
785  return NextInContextAndBits.getInt();
786  }
787 
788  /// Set whether this declaration is hidden from name lookup.
790  assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&
791  MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&
792  !hasLocalOwningModuleStorage()) &&
793  "no storage available for owning module for this declaration");
794  NextInContextAndBits.setInt(MOK);
795  }
796 
797  unsigned getIdentifierNamespace() const {
798  return IdentifierNamespace;
799  }
800 
801  bool isInIdentifierNamespace(unsigned NS) const {
802  return getIdentifierNamespace() & NS;
803  }
804 
805  static unsigned getIdentifierNamespaceForKind(Kind DK);
806 
808  return isTagIdentifierNamespace(getIdentifierNamespace());
809  }
810 
811  static bool isTagIdentifierNamespace(unsigned NS) {
812  // TagDecls have Tag and Type set and may also have TagFriend.
813  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
814  }
815 
816  /// getLexicalDeclContext - The declaration context where this Decl was
817  /// lexically declared (LexicalDC). May be different from
818  /// getDeclContext() (SemanticDC).
819  /// e.g.:
820  ///
821  /// namespace A {
822  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
823  /// }
824  /// void A::f(); // SemanticDC == namespace 'A'
825  /// // LexicalDC == global namespace
827  if (isInSemaDC())
828  return getSemanticDC();
829  return getMultipleDC()->LexicalDC;
830  }
832  return const_cast<Decl*>(this)->getLexicalDeclContext();
833  }
834 
835  /// Determine whether this declaration is declared out of line (outside its
836  /// semantic context).
837  virtual bool isOutOfLine() const;
838 
839  /// setDeclContext - Set both the semantic and lexical DeclContext
840  /// to DC.
841  void setDeclContext(DeclContext *DC);
842 
843  void setLexicalDeclContext(DeclContext *DC);
844 
845  /// Determine whether this declaration is a templated entity (whether it is
846  // within the scope of a template parameter).
847  bool isTemplated() const;
848 
849  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
850  /// scoped decl is defined outside the current function or method. This is
851  /// roughly global variables and functions, but also handles enums (which
852  /// could be defined inside or outside a function etc).
854  return getParentFunctionOrMethod() == nullptr;
855  }
856 
857  /// Returns true if this declaration lexically is inside a function.
858  /// It recognizes non-defining declarations as well as members of local
859  /// classes:
860  /// \code
861  /// void foo() { void bar(); }
862  /// void foo2() { class ABC { void bar(); }; }
863  /// \endcode
864  bool isLexicallyWithinFunctionOrMethod() const;
865 
866  /// If this decl is defined inside a function/method/block it returns
867  /// the corresponding DeclContext, otherwise it returns null.
868  const DeclContext *getParentFunctionOrMethod() const;
870  return const_cast<DeclContext*>(
871  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
872  }
873 
874  /// Retrieves the "canonical" declaration of the given declaration.
875  virtual Decl *getCanonicalDecl() { return this; }
876  const Decl *getCanonicalDecl() const {
877  return const_cast<Decl*>(this)->getCanonicalDecl();
878  }
879 
880  /// Whether this particular Decl is a canonical one.
881  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
882 
883 protected:
884  /// Returns the next redeclaration or itself if this is the only decl.
885  ///
886  /// Decl subclasses that can be redeclared should override this method so that
887  /// Decl::redecl_iterator can iterate over them.
888  virtual Decl *getNextRedeclarationImpl() { return this; }
889 
890  /// Implementation of getPreviousDecl(), to be overridden by any
891  /// subclass that has a redeclaration chain.
892  virtual Decl *getPreviousDeclImpl() { return nullptr; }
893 
894  /// Implementation of getMostRecentDecl(), to be overridden by any
895  /// subclass that has a redeclaration chain.
896  virtual Decl *getMostRecentDeclImpl() { return this; }
897 
898 public:
899  /// Iterates through all the redeclarations of the same decl.
901  /// Current - The current declaration.
902  Decl *Current = nullptr;
903  Decl *Starter;
904 
905  public:
906  using value_type = Decl *;
907  using reference = const value_type &;
908  using pointer = const value_type *;
909  using iterator_category = std::forward_iterator_tag;
911 
912  redecl_iterator() = default;
913  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
914 
915  reference operator*() const { return Current; }
916  value_type operator->() const { return Current; }
917 
919  assert(Current && "Advancing while iterator has reached end");
920  // Get either previous decl or latest decl.
921  Decl *Next = Current->getNextRedeclarationImpl();
922  assert(Next && "Should return next redeclaration or itself, never null!");
923  Current = (Next != Starter) ? Next : nullptr;
924  return *this;
925  }
926 
928  redecl_iterator tmp(*this);
929  ++(*this);
930  return tmp;
931  }
932 
934  return x.Current == y.Current;
935  }
936 
938  return x.Current != y.Current;
939  }
940  };
941 
942  using redecl_range = llvm::iterator_range<redecl_iterator>;
943 
944  /// Returns an iterator range for all the redeclarations of the same
945  /// decl. It will iterate at least once (when this decl is the only one).
947  return redecl_range(redecls_begin(), redecls_end());
948  }
949 
951  return redecl_iterator(const_cast<Decl *>(this));
952  }
953 
955 
956  /// Retrieve the previous declaration that declares the same entity
957  /// as this declaration, or NULL if there is no previous declaration.
958  Decl *getPreviousDecl() { return getPreviousDeclImpl(); }
959 
960  /// Retrieve the most recent declaration that declares the same entity
961  /// as this declaration, or NULL if there is no previous declaration.
962  const Decl *getPreviousDecl() const {
963  return const_cast<Decl *>(this)->getPreviousDeclImpl();
964  }
965 
966  /// True if this is the first declaration in its redeclaration chain.
967  bool isFirstDecl() const {
968  return getPreviousDecl() == nullptr;
969  }
970 
971  /// Retrieve the most recent declaration that declares the same entity
972  /// as this declaration (which may be this declaration).
973  Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); }
974 
975  /// Retrieve the most recent declaration that declares the same entity
976  /// as this declaration (which may be this declaration).
977  const Decl *getMostRecentDecl() const {
978  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
979  }
980 
981  /// getBody - If this Decl represents a declaration for a body of code,
982  /// such as a function or method definition, this method returns the
983  /// top-level Stmt* of that body. Otherwise this method returns null.
984  virtual Stmt* getBody() const { return nullptr; }
985 
986  /// Returns true if this \c Decl represents a declaration for a body of
987  /// code, such as a function or method definition.
988  /// Note that \c hasBody can also return true if any redeclaration of this
989  /// \c Decl represents a declaration for a body of code.
990  virtual bool hasBody() const { return getBody() != nullptr; }
991 
992  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
993  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
994  SourceLocation getBodyRBrace() const;
995 
996  // global temp stats (until we have a per-module visitor)
997  static void add(Kind k);
998  static void EnableStatistics();
999  static void PrintStats();
1000 
1001  /// isTemplateParameter - Determines whether this declaration is a
1002  /// template parameter.
1003  bool isTemplateParameter() const;
1004 
1005  /// isTemplateParameter - Determines whether this declaration is a
1006  /// template parameter pack.
1007  bool isTemplateParameterPack() const;
1008 
1009  /// Whether this declaration is a parameter pack.
1010  bool isParameterPack() const;
1011 
1012  /// returns true if this declaration is a template
1013  bool isTemplateDecl() const;
1014 
1015  /// Whether this declaration is a function or function template.
1017  return (DeclKind >= Decl::firstFunction &&
1018  DeclKind <= Decl::lastFunction) ||
1019  DeclKind == FunctionTemplate;
1020  }
1021 
1022  /// If this is a declaration that describes some template, this
1023  /// method returns that template declaration.
1025 
1026  /// Returns the function itself, or the templated function if this is a
1027  /// function template.
1028  FunctionDecl *getAsFunction() LLVM_READONLY;
1029 
1030  const FunctionDecl *getAsFunction() const {
1031  return const_cast<Decl *>(this)->getAsFunction();
1032  }
1033 
1034  /// Changes the namespace of this declaration to reflect that it's
1035  /// a function-local extern declaration.
1036  ///
1037  /// These declarations appear in the lexical context of the extern
1038  /// declaration, but in the semantic context of the enclosing namespace
1039  /// scope.
1041  Decl *Prev = getPreviousDecl();
1042  IdentifierNamespace &= ~IDNS_Ordinary;
1043 
1044  // It's OK for the declaration to still have the "invisible friend" flag or
1045  // the "conflicts with tag declarations in this scope" flag for the outer
1046  // scope.
1047  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1048  "namespace is not ordinary");
1049 
1050  IdentifierNamespace |= IDNS_LocalExtern;
1051  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1052  IdentifierNamespace |= IDNS_Ordinary;
1053  }
1054 
1055  /// Determine whether this is a block-scope declaration with linkage.
1056  /// This will either be a local variable declaration declared 'extern', or a
1057  /// local function declaration.
1059  return IdentifierNamespace & IDNS_LocalExtern;
1060  }
1061 
1062  /// Changes the namespace of this declaration to reflect that it's
1063  /// the object of a friend declaration.
1064  ///
1065  /// These declarations appear in the lexical context of the friending
1066  /// class, but in the semantic context of the actual entity. This property
1067  /// applies only to a specific decl object; other redeclarations of the
1068  /// same entity may not (and probably don't) share this property.
1069  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1070  unsigned OldNS = IdentifierNamespace;
1071  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1072  IDNS_TagFriend | IDNS_OrdinaryFriend |
1073  IDNS_LocalExtern)) &&
1074  "namespace includes neither ordinary nor tag");
1075  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1076  IDNS_TagFriend | IDNS_OrdinaryFriend |
1077  IDNS_LocalExtern)) &&
1078  "namespace includes other than ordinary or tag");
1079 
1080  Decl *Prev = getPreviousDecl();
1081  IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type);
1082 
1083  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1084  IdentifierNamespace |= IDNS_TagFriend;
1085  if (PerformFriendInjection ||
1086  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1087  IdentifierNamespace |= IDNS_Tag | IDNS_Type;
1088  }
1089 
1090  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | IDNS_LocalExtern)) {
1091  IdentifierNamespace |= IDNS_OrdinaryFriend;
1092  if (PerformFriendInjection ||
1093  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1094  IdentifierNamespace |= IDNS_Ordinary;
1095  }
1096  }
1097 
1099  FOK_None, ///< Not a friend object.
1100  FOK_Declared, ///< A friend of a previously-declared entity.
1101  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1102  };
1103 
1104  /// Determines whether this declaration is the object of a
1105  /// friend declaration and, if so, what kind.
1106  ///
1107  /// There is currently no direct way to find the associated FriendDecl.
1109  unsigned mask =
1110  (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend));
1111  if (!mask) return FOK_None;
1112  return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared
1113  : FOK_Undeclared);
1114  }
1115 
1116  /// Specifies that this declaration is a C++ overloaded non-member.
1118  assert(getKind() == Function || getKind() == FunctionTemplate);
1119  assert((IdentifierNamespace & IDNS_Ordinary) &&
1120  "visible non-member operators should be in ordinary namespace");
1121  IdentifierNamespace |= IDNS_NonMemberOperator;
1122  }
1123 
1124  static bool classofKind(Kind K) { return true; }
1125  static DeclContext *castToDeclContext(const Decl *);
1126  static Decl *castFromDeclContext(const DeclContext *);
1127 
1128  void print(raw_ostream &Out, unsigned Indentation = 0,
1129  bool PrintInstantiation = false) const;
1130  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1131  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1132  static void printGroup(Decl** Begin, unsigned NumDecls,
1133  raw_ostream &Out, const PrintingPolicy &Policy,
1134  unsigned Indentation = 0);
1135 
1136  // Debuggers don't usually respect default arguments.
1137  void dump() const;
1138 
1139  // Same as dump(), but forces color printing.
1140  void dumpColor() const;
1141 
1142  void dump(raw_ostream &Out, bool Deserialize = false) const;
1143 
1144  /// Looks through the Decl's underlying type to extract a FunctionType
1145  /// when possible. Will return null if the type underlying the Decl does not
1146  /// have a FunctionType.
1147  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1148 
1149 private:
1150  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1151  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1152  ASTContext &Ctx);
1153 
1154 protected:
1155  ASTMutationListener *getASTMutationListener() const;
1156 };
1157 
1158 /// Determine whether two declarations declare the same entity.
1159 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1160  if (!D1 || !D2)
1161  return false;
1162 
1163  if (D1 == D2)
1164  return true;
1165 
1166  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1167 }
1168 
1169 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1170 /// doing something to a specific decl.
1171 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1172  const Decl *TheDecl;
1173  SourceLocation Loc;
1174  SourceManager &SM;
1175  const char *Message;
1176 
1177 public:
1179  SourceManager &sm, const char *Msg)
1180  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1181 
1182  void print(raw_ostream &OS) const override;
1183 };
1184 
1185 /// The results of name lookup within a DeclContext. This is either a
1186 /// single result (with no stable storage) or a collection of results (with
1187 /// stable storage provided by the lookup table).
1190 
1191  ResultTy Result;
1192 
1193  // If there is only one lookup result, it would be invalidated by
1194  // reallocations of the name table, so store it separately.
1195  NamedDecl *Single = nullptr;
1196 
1197  static NamedDecl *const SingleElementDummyList;
1198 
1199 public:
1200  DeclContextLookupResult() = default;
1202  : Result(Result) {}
1204  : Result(SingleElementDummyList), Single(Single) {}
1205 
1206  class iterator;
1207 
1208  using IteratorBase =
1209  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1210  std::random_access_iterator_tag,
1211  NamedDecl *const>;
1212 
1213  class iterator : public IteratorBase {
1214  value_type SingleElement;
1215 
1216  public:
1217  iterator() = default;
1218  explicit iterator(pointer Pos, value_type Single = nullptr)
1219  : IteratorBase(Pos), SingleElement(Single) {}
1220 
1222  return SingleElement ? SingleElement : IteratorBase::operator*();
1223  }
1224  };
1225 
1226  using const_iterator = iterator;
1227  using pointer = iterator::pointer;
1228  using reference = iterator::reference;
1229 
1230  iterator begin() const { return iterator(Result.begin(), Single); }
1231  iterator end() const { return iterator(Result.end(), Single); }
1232 
1233  bool empty() const { return Result.empty(); }
1234  pointer data() const { return Single ? &Single : Result.data(); }
1235  size_t size() const { return Single ? 1 : Result.size(); }
1236  reference front() const { return Single ? Single : Result.front(); }
1237  reference back() const { return Single ? Single : Result.back(); }
1238  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1239 
1240  // FIXME: Remove this from the interface
1241  DeclContextLookupResult slice(size_t N) const {
1242  DeclContextLookupResult Sliced = Result.slice(N);
1243  Sliced.Single = Single;
1244  return Sliced;
1245  }
1246 };
1247 
1248 /// DeclContext - This is used only as base class of specific decl types that
1249 /// can act as declaration contexts. These decls are (only the top classes
1250 /// that directly derive from DeclContext are mentioned, not their subclasses):
1251 ///
1252 /// TranslationUnitDecl
1253 /// NamespaceDecl
1254 /// FunctionDecl
1255 /// TagDecl
1256 /// ObjCMethodDecl
1257 /// ObjCContainerDecl
1258 /// LinkageSpecDecl
1259 /// ExportDecl
1260 /// BlockDecl
1261 /// OMPDeclareReductionDecl
1263  /// DeclKind - This indicates which class this is.
1264  unsigned DeclKind : 8;
1265 
1266  /// Whether this declaration context also has some external
1267  /// storage that contains additional declarations that are lexically
1268  /// part of this context.
1269  mutable bool ExternalLexicalStorage : 1;
1270 
1271  /// Whether this declaration context also has some external
1272  /// storage that contains additional declarations that are visible
1273  /// in this context.
1274  mutable bool ExternalVisibleStorage : 1;
1275 
1276  /// Whether this declaration context has had external visible
1277  /// storage added since the last lookup. In this case, \c LookupPtr's
1278  /// invariant may not hold and needs to be fixed before we perform
1279  /// another lookup.
1280  mutable bool NeedToReconcileExternalVisibleStorage : 1;
1281 
1282  /// If \c true, this context may have local lexical declarations
1283  /// that are missing from the lookup table.
1284  mutable bool HasLazyLocalLexicalLookups : 1;
1285 
1286  /// If \c true, the external source may have lexical declarations
1287  /// that are missing from the lookup table.
1288  mutable bool HasLazyExternalLexicalLookups : 1;
1289 
1290  /// If \c true, lookups should only return identifier from
1291  /// DeclContext scope (for example TranslationUnit). Used in
1292  /// LookupQualifiedName()
1293  mutable bool UseQualifiedLookup : 1;
1294 
1295  /// Pointer to the data structure used to lookup declarations
1296  /// within this context (or a DependentStoredDeclsMap if this is a
1297  /// dependent context). We maintain the invariant that, if the map
1298  /// contains an entry for a DeclarationName (and we haven't lazily
1299  /// omitted anything), then it contains all relevant entries for that
1300  /// name (modulo the hasExternalDecls() flag).
1301  mutable StoredDeclsMap *LookupPtr = nullptr;
1302 
1303 protected:
1304  friend class ASTDeclReader;
1305  friend class ASTWriter;
1306  friend class ExternalASTSource;
1307 
1308  /// FirstDecl - The first declaration stored within this declaration
1309  /// context.
1310  mutable Decl *FirstDecl = nullptr;
1311 
1312  /// LastDecl - The last declaration stored within this declaration
1313  /// context. FIXME: We could probably cache this value somewhere
1314  /// outside of the DeclContext, to reduce the size of DeclContext by
1315  /// another pointer.
1316  mutable Decl *LastDecl = nullptr;
1317 
1318  /// Build up a chain of declarations.
1319  ///
1320  /// \returns the first/last pair of declarations.
1321  static std::pair<Decl *, Decl *>
1322  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1323 
1325  : DeclKind(K), ExternalLexicalStorage(false),
1326  ExternalVisibleStorage(false),
1327  NeedToReconcileExternalVisibleStorage(false),
1328  HasLazyLocalLexicalLookups(false), HasLazyExternalLexicalLookups(false),
1329  UseQualifiedLookup(false) {}
1330 
1331 public:
1332  ~DeclContext();
1333 
1335  return static_cast<Decl::Kind>(DeclKind);
1336  }
1337 
1338  const char *getDeclKindName() const;
1339 
1340  /// getParent - Returns the containing DeclContext.
1342  return cast<Decl>(this)->getDeclContext();
1343  }
1344  const DeclContext *getParent() const {
1345  return const_cast<DeclContext*>(this)->getParent();
1346  }
1347 
1348  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1349  /// different from getParent, e.g.:
1350  ///
1351  /// namespace A {
1352  /// struct S;
1353  /// }
1354  /// struct A::S {}; // getParent() == namespace 'A'
1355  /// // getLexicalParent() == translation unit
1356  ///
1358  return cast<Decl>(this)->getLexicalDeclContext();
1359  }
1361  return const_cast<DeclContext*>(this)->getLexicalParent();
1362  }
1363 
1364  DeclContext *getLookupParent();
1365 
1366  const DeclContext *getLookupParent() const {
1367  return const_cast<DeclContext*>(this)->getLookupParent();
1368  }
1369 
1371  return cast<Decl>(this)->getASTContext();
1372  }
1373 
1374  bool isClosure() const {
1375  return DeclKind == Decl::Block;
1376  }
1377 
1378  bool isObjCContainer() const {
1379  switch (DeclKind) {
1380  case Decl::ObjCCategory:
1381  case Decl::ObjCCategoryImpl:
1382  case Decl::ObjCImplementation:
1383  case Decl::ObjCInterface:
1384  case Decl::ObjCProtocol:
1385  return true;
1386  }
1387  return false;
1388  }
1389 
1390  bool isFunctionOrMethod() const {
1391  switch (DeclKind) {
1392  case Decl::Block:
1393  case Decl::Captured:
1394  case Decl::ObjCMethod:
1395  return true;
1396  default:
1397  return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction;
1398  }
1399  }
1400 
1401  /// Test whether the context supports looking up names.
1402  bool isLookupContext() const {
1403  return !isFunctionOrMethod() && DeclKind != Decl::LinkageSpec &&
1404  DeclKind != Decl::Export;
1405  }
1406 
1407  bool isFileContext() const {
1408  return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace;
1409  }
1410 
1411  bool isTranslationUnit() const {
1412  return DeclKind == Decl::TranslationUnit;
1413  }
1414 
1415  bool isRecord() const {
1416  return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord;
1417  }
1418 
1419  bool isNamespace() const {
1420  return DeclKind == Decl::Namespace;
1421  }
1422 
1423  bool isStdNamespace() const;
1424 
1425  bool isInlineNamespace() const;
1426 
1427  /// Determines whether this context is dependent on a
1428  /// template parameter.
1429  bool isDependentContext() const;
1430 
1431  /// isTransparentContext - Determines whether this context is a
1432  /// "transparent" context, meaning that the members declared in this
1433  /// context are semantically declared in the nearest enclosing
1434  /// non-transparent (opaque) context but are lexically declared in
1435  /// this context. For example, consider the enumerators of an
1436  /// enumeration type:
1437  /// @code
1438  /// enum E {
1439  /// Val1
1440  /// };
1441  /// @endcode
1442  /// Here, E is a transparent context, so its enumerator (Val1) will
1443  /// appear (semantically) that it is in the same context of E.
1444  /// Examples of transparent contexts include: enumerations (except for
1445  /// C++0x scoped enums), and C++ linkage specifications.
1446  bool isTransparentContext() const;
1447 
1448  /// Determines whether this context or some of its ancestors is a
1449  /// linkage specification context that specifies C linkage.
1450  bool isExternCContext() const;
1451 
1452  /// Retrieve the nearest enclosing C linkage specification context.
1453  const LinkageSpecDecl *getExternCContext() const;
1454 
1455  /// Determines whether this context or some of its ancestors is a
1456  /// linkage specification context that specifies C++ linkage.
1457  bool isExternCXXContext() const;
1458 
1459  /// Determine whether this declaration context is equivalent
1460  /// to the declaration context DC.
1461  bool Equals(const DeclContext *DC) const {
1462  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1463  }
1464 
1465  /// Determine whether this declaration context encloses the
1466  /// declaration context DC.
1467  bool Encloses(const DeclContext *DC) const;
1468 
1469  /// Find the nearest non-closure ancestor of this context,
1470  /// i.e. the innermost semantic parent of this context which is not
1471  /// a closure. A context may be its own non-closure ancestor.
1472  Decl *getNonClosureAncestor();
1473  const Decl *getNonClosureAncestor() const {
1474  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1475  }
1476 
1477  /// getPrimaryContext - There may be many different
1478  /// declarations of the same entity (including forward declarations
1479  /// of classes, multiple definitions of namespaces, etc.), each with
1480  /// a different set of declarations. This routine returns the
1481  /// "primary" DeclContext structure, which will contain the
1482  /// information needed to perform name lookup into this context.
1483  DeclContext *getPrimaryContext();
1485  return const_cast<DeclContext*>(this)->getPrimaryContext();
1486  }
1487 
1488  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1489  /// other entities of the same name, or where it is a redeclaration if the
1490  /// two entities are compatible. This skips through transparent contexts.
1491  DeclContext *getRedeclContext();
1493  return const_cast<DeclContext *>(this)->getRedeclContext();
1494  }
1495 
1496  /// Retrieve the nearest enclosing namespace context.
1497  DeclContext *getEnclosingNamespaceContext();
1499  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1500  }
1501 
1502  /// Retrieve the outermost lexically enclosing record context.
1503  RecordDecl *getOuterLexicalRecordContext();
1505  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1506  }
1507 
1508  /// Test if this context is part of the enclosing namespace set of
1509  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1510  /// isn't a namespace, this is equivalent to Equals().
1511  ///
1512  /// The enclosing namespace set of a namespace is the namespace and, if it is
1513  /// inline, its enclosing namespace, recursively.
1514  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1515 
1516  /// Collects all of the declaration contexts that are semantically
1517  /// connected to this declaration context.
1518  ///
1519  /// For declaration contexts that have multiple semantically connected but
1520  /// syntactically distinct contexts, such as C++ namespaces, this routine
1521  /// retrieves the complete set of such declaration contexts in source order.
1522  /// For example, given:
1523  ///
1524  /// \code
1525  /// namespace N {
1526  /// int x;
1527  /// }
1528  /// namespace N {
1529  /// int y;
1530  /// }
1531  /// \endcode
1532  ///
1533  /// The \c Contexts parameter will contain both definitions of N.
1534  ///
1535  /// \param Contexts Will be cleared and set to the set of declaration
1536  /// contexts that are semanticaly connected to this declaration context,
1537  /// in source order, including this context (which may be the only result,
1538  /// for non-namespace contexts).
1539  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1540 
1541  /// decl_iterator - Iterates through the declarations stored
1542  /// within this context.
1544  /// Current - The current declaration.
1545  Decl *Current = nullptr;
1546 
1547  public:
1548  using value_type = Decl *;
1549  using reference = const value_type &;
1550  using pointer = const value_type *;
1551  using iterator_category = std::forward_iterator_tag;
1553 
1554  decl_iterator() = default;
1555  explicit decl_iterator(Decl *C) : Current(C) {}
1556 
1557  reference operator*() const { return Current; }
1558 
1559  // This doesn't meet the iterator requirements, but it's convenient
1560  value_type operator->() const { return Current; }
1561 
1563  Current = Current->getNextDeclInContext();
1564  return *this;
1565  }
1566 
1568  decl_iterator tmp(*this);
1569  ++(*this);
1570  return tmp;
1571  }
1572 
1574  return x.Current == y.Current;
1575  }
1576 
1578  return x.Current != y.Current;
1579  }
1580  };
1581 
1582  using decl_range = llvm::iterator_range<decl_iterator>;
1583 
1584  /// decls_begin/decls_end - Iterate over the declarations stored in
1585  /// this context.
1586  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1587  decl_iterator decls_begin() const;
1588  decl_iterator decls_end() const { return decl_iterator(); }
1589  bool decls_empty() const;
1590 
1591  /// noload_decls_begin/end - Iterate over the declarations stored in this
1592  /// context that are currently loaded; don't attempt to retrieve anything
1593  /// from an external source.
1595  return decl_range(noload_decls_begin(), noload_decls_end());
1596  }
1597  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
1599 
1600  /// specific_decl_iterator - Iterates over a subrange of
1601  /// declarations stored in a DeclContext, providing only those that
1602  /// are of type SpecificDecl (or a class derived from it). This
1603  /// iterator is used, for example, to provide iteration over just
1604  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
1605  template<typename SpecificDecl>
1607  /// Current - The current, underlying declaration iterator, which
1608  /// will either be NULL or will point to a declaration of
1609  /// type SpecificDecl.
1611 
1612  /// SkipToNextDecl - Advances the current position up to the next
1613  /// declaration of type SpecificDecl that also meets the criteria
1614  /// required by Acceptable.
1615  void SkipToNextDecl() {
1616  while (*Current && !isa<SpecificDecl>(*Current))
1617  ++Current;
1618  }
1619 
1620  public:
1621  using value_type = SpecificDecl *;
1622  // TODO: Add reference and pointer types (with some appropriate proxy type)
1623  // if we ever have a need for them.
1624  using reference = void;
1625  using pointer = void;
1626  using difference_type =
1627  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
1628  using iterator_category = std::forward_iterator_tag;
1629 
1630  specific_decl_iterator() = default;
1631 
1632  /// specific_decl_iterator - Construct a new iterator over a
1633  /// subset of the declarations the range [C,
1634  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1635  /// member function of SpecificDecl that should return true for
1636  /// all of the SpecificDecl instances that will be in the subset
1637  /// of iterators. For example, if you want Objective-C instance
1638  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1639  /// &ObjCMethodDecl::isInstanceMethod.
1641  SkipToNextDecl();
1642  }
1643 
1644  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1645 
1646  // This doesn't meet the iterator requirements, but it's convenient
1647  value_type operator->() const { return **this; }
1648 
1650  ++Current;
1651  SkipToNextDecl();
1652  return *this;
1653  }
1654 
1656  specific_decl_iterator tmp(*this);
1657  ++(*this);
1658  return tmp;
1659  }
1660 
1661  friend bool operator==(const specific_decl_iterator& x,
1662  const specific_decl_iterator& y) {
1663  return x.Current == y.Current;
1664  }
1665 
1666  friend bool operator!=(const specific_decl_iterator& x,
1667  const specific_decl_iterator& y) {
1668  return x.Current != y.Current;
1669  }
1670  };
1671 
1672  /// Iterates over a filtered subrange of declarations stored
1673  /// in a DeclContext.
1674  ///
1675  /// This iterator visits only those declarations that are of type
1676  /// SpecificDecl (or a class derived from it) and that meet some
1677  /// additional run-time criteria. This iterator is used, for
1678  /// example, to provide access to the instance methods within an
1679  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
1680  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
1681  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
1683  /// Current - The current, underlying declaration iterator, which
1684  /// will either be NULL or will point to a declaration of
1685  /// type SpecificDecl.
1687 
1688  /// SkipToNextDecl - Advances the current position up to the next
1689  /// declaration of type SpecificDecl that also meets the criteria
1690  /// required by Acceptable.
1691  void SkipToNextDecl() {
1692  while (*Current &&
1693  (!isa<SpecificDecl>(*Current) ||
1694  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
1695  ++Current;
1696  }
1697 
1698  public:
1699  using value_type = SpecificDecl *;
1700  // TODO: Add reference and pointer types (with some appropriate proxy type)
1701  // if we ever have a need for them.
1702  using reference = void;
1703  using pointer = void;
1704  using difference_type =
1705  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
1706  using iterator_category = std::forward_iterator_tag;
1707 
1708  filtered_decl_iterator() = default;
1709 
1710  /// filtered_decl_iterator - Construct a new iterator over a
1711  /// subset of the declarations the range [C,
1712  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1713  /// member function of SpecificDecl that should return true for
1714  /// all of the SpecificDecl instances that will be in the subset
1715  /// of iterators. For example, if you want Objective-C instance
1716  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1717  /// &ObjCMethodDecl::isInstanceMethod.
1719  SkipToNextDecl();
1720  }
1721 
1722  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1723  value_type operator->() const { return cast<SpecificDecl>(*Current); }
1724 
1726  ++Current;
1727  SkipToNextDecl();
1728  return *this;
1729  }
1730 
1732  filtered_decl_iterator tmp(*this);
1733  ++(*this);
1734  return tmp;
1735  }
1736 
1737  friend bool operator==(const filtered_decl_iterator& x,
1738  const filtered_decl_iterator& y) {
1739  return x.Current == y.Current;
1740  }
1741 
1742  friend bool operator!=(const filtered_decl_iterator& x,
1743  const filtered_decl_iterator& y) {
1744  return x.Current != y.Current;
1745  }
1746  };
1747 
1748  /// Add the declaration D into this context.
1749  ///
1750  /// This routine should be invoked when the declaration D has first
1751  /// been declared, to place D into the context where it was
1752  /// (lexically) defined. Every declaration must be added to one
1753  /// (and only one!) context, where it can be visited via
1754  /// [decls_begin(), decls_end()). Once a declaration has been added
1755  /// to its lexical context, the corresponding DeclContext owns the
1756  /// declaration.
1757  ///
1758  /// If D is also a NamedDecl, it will be made visible within its
1759  /// semantic context via makeDeclVisibleInContext.
1760  void addDecl(Decl *D);
1761 
1762  /// Add the declaration D into this context, but suppress
1763  /// searches for external declarations with the same name.
1764  ///
1765  /// Although analogous in function to addDecl, this removes an
1766  /// important check. This is only useful if the Decl is being
1767  /// added in response to an external search; in all other cases,
1768  /// addDecl() is the right function to use.
1769  /// See the ASTImporter for use cases.
1770  void addDeclInternal(Decl *D);
1771 
1772  /// Add the declaration D to this context without modifying
1773  /// any lookup tables.
1774  ///
1775  /// This is useful for some operations in dependent contexts where
1776  /// the semantic context might not be dependent; this basically
1777  /// only happens with friends.
1778  void addHiddenDecl(Decl *D);
1779 
1780  /// Removes a declaration from this context.
1781  void removeDecl(Decl *D);
1782 
1783  /// Checks whether a declaration is in this context.
1784  bool containsDecl(Decl *D) const;
1785 
1788 
1789  /// lookup - Find the declarations (if any) with the given Name in
1790  /// this context. Returns a range of iterators that contains all of
1791  /// the declarations with this name, with object, function, member,
1792  /// and enumerator names preceding any tag name. Note that this
1793  /// routine will not look into parent contexts.
1794  lookup_result lookup(DeclarationName Name) const;
1795 
1796  /// Find the declarations with the given name that are visible
1797  /// within this context; don't attempt to retrieve anything from an
1798  /// external source.
1799  lookup_result noload_lookup(DeclarationName Name);
1800 
1801  /// A simplistic name lookup mechanism that performs name lookup
1802  /// into this declaration context without consulting the external source.
1803  ///
1804  /// This function should almost never be used, because it subverts the
1805  /// usual relationship between a DeclContext and the external source.
1806  /// See the ASTImporter for the (few, but important) use cases.
1807  ///
1808  /// FIXME: This is very inefficient; replace uses of it with uses of
1809  /// noload_lookup.
1810  void localUncachedLookup(DeclarationName Name,
1811  SmallVectorImpl<NamedDecl *> &Results);
1812 
1813  /// Makes a declaration visible within this context.
1814  ///
1815  /// This routine makes the declaration D visible to name lookup
1816  /// within this context and, if this is a transparent context,
1817  /// within its parent contexts up to the first enclosing
1818  /// non-transparent context. Making a declaration visible within a
1819  /// context does not transfer ownership of a declaration, and a
1820  /// declaration can be visible in many contexts that aren't its
1821  /// lexical context.
1822  ///
1823  /// If D is a redeclaration of an existing declaration that is
1824  /// visible from this context, as determined by
1825  /// NamedDecl::declarationReplaces, the previous declaration will be
1826  /// replaced with D.
1827  void makeDeclVisibleInContext(NamedDecl *D);
1828 
1829  /// all_lookups_iterator - An iterator that provides a view over the results
1830  /// of looking up every possible name.
1831  class all_lookups_iterator;
1832 
1833  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
1834 
1835  lookups_range lookups() const;
1836  // Like lookups(), but avoids loading external declarations.
1837  // If PreserveInternalState, avoids building lookup data structures too.
1838  lookups_range noload_lookups(bool PreserveInternalState) const;
1839 
1840  /// Iterators over all possible lookups within this context.
1841  all_lookups_iterator lookups_begin() const;
1842  all_lookups_iterator lookups_end() const;
1843 
1844  /// Iterators over all possible lookups within this context that are
1845  /// currently loaded; don't attempt to retrieve anything from an external
1846  /// source.
1847  all_lookups_iterator noload_lookups_begin() const;
1848  all_lookups_iterator noload_lookups_end() const;
1849 
1850  struct udir_iterator;
1851 
1852  using udir_iterator_base =
1853  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
1854  std::random_access_iterator_tag,
1856 
1857  struct udir_iterator : udir_iterator_base {
1858  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
1859 
1860  UsingDirectiveDecl *operator*() const;
1861  };
1862 
1863  using udir_range = llvm::iterator_range<udir_iterator>;
1864 
1865  udir_range using_directives() const;
1866 
1867  // These are all defined in DependentDiagnostic.h.
1868  class ddiag_iterator;
1869 
1870  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
1871 
1872  inline ddiag_range ddiags() const;
1873 
1874  // Low-level accessors
1875 
1876  /// Mark that there are external lexical declarations that we need
1877  /// to include in our lookup table (and that are not available as external
1878  /// visible lookups). These extra lookup results will be found by walking
1879  /// the lexical declarations of this context. This should be used only if
1880  /// setHasExternalLexicalStorage() has been called on any decl context for
1881  /// which this is the primary context.
1883  assert(this == getPrimaryContext() &&
1884  "should only be called on primary context");
1885  HasLazyExternalLexicalLookups = true;
1886  }
1887 
1888  /// Retrieve the internal representation of the lookup structure.
1889  /// This may omit some names if we are lazily building the structure.
1890  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
1891 
1892  /// Ensure the lookup structure is fully-built and return it.
1893  StoredDeclsMap *buildLookup();
1894 
1895  /// Whether this DeclContext has external storage containing
1896  /// additional declarations that are lexically in this context.
1897  bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; }
1898 
1899  /// State whether this DeclContext has external storage for
1900  /// declarations lexically in this context.
1901  void setHasExternalLexicalStorage(bool ES = true) {
1902  ExternalLexicalStorage = ES;
1903  }
1904 
1905  /// Whether this DeclContext has external storage containing
1906  /// additional declarations that are visible in this context.
1907  bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; }
1908 
1909  /// State whether this DeclContext has external storage for
1910  /// declarations visible in this context.
1911  void setHasExternalVisibleStorage(bool ES = true) {
1912  ExternalVisibleStorage = ES;
1913  if (ES && LookupPtr)
1914  NeedToReconcileExternalVisibleStorage = true;
1915  }
1916 
1917  /// Determine whether the given declaration is stored in the list of
1918  /// declarations lexically within this context.
1919  bool isDeclInLexicalTraversal(const Decl *D) const {
1920  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
1921  D == LastDecl);
1922  }
1923 
1924  bool setUseQualifiedLookup(bool use = true) {
1925  bool old_value = UseQualifiedLookup;
1926  UseQualifiedLookup = use;
1927  return old_value;
1928  }
1929 
1931  return UseQualifiedLookup;
1932  }
1933 
1934  static bool classof(const Decl *D);
1935  static bool classof(const DeclContext *D) { return true; }
1936 
1937  void dumpDeclContext() const;
1938  void dumpLookups() const;
1939  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
1940  bool Deserialize = false) const;
1941 
1942 private:
1943  friend class DependentDiagnostic;
1944 
1945  void reconcileExternalVisibleStorage() const;
1946  bool LoadLexicalDeclsFromExternalStorage() const;
1947 
1948  /// Makes a declaration visible within this context, but
1949  /// suppresses searches for external declarations with the same
1950  /// name.
1951  ///
1952  /// Analogous to makeDeclVisibleInContext, but for the exclusive
1953  /// use of addDeclInternal().
1954  void makeDeclVisibleInContextInternal(NamedDecl *D);
1955 
1956  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
1957 
1958  void loadLazyLocalLexicalLookups();
1959  void buildLookupImpl(DeclContext *DCtx, bool Internal);
1960  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1961  bool Rediscoverable);
1962  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
1963 };
1964 
1965 inline bool Decl::isTemplateParameter() const {
1966  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
1967  getKind() == TemplateTemplateParm;
1968 }
1969 
1970 // Specialization selected when ToTy is not a known subclass of DeclContext.
1971 template <class ToTy,
1972  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
1974  static const ToTy *doit(const DeclContext *Val) {
1975  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
1976  }
1977 
1978  static ToTy *doit(DeclContext *Val) {
1979  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
1980  }
1981 };
1982 
1983 // Specialization selected when ToTy is a known subclass of DeclContext.
1984 template <class ToTy>
1986  static const ToTy *doit(const DeclContext *Val) {
1987  return static_cast<const ToTy*>(Val);
1988  }
1989 
1990  static ToTy *doit(DeclContext *Val) {
1991  return static_cast<ToTy*>(Val);
1992  }
1993 };
1994 
1995 } // namespace clang
1996 
1997 namespace llvm {
1998 
1999 /// isa<T>(DeclContext*)
2000 template <typename To>
2001 struct isa_impl<To, ::clang::DeclContext> {
2002  static bool doit(const ::clang::DeclContext &Val) {
2003  return To::classofKind(Val.getDeclKind());
2004  }
2005 };
2006 
2007 /// cast<T>(DeclContext*)
2008 template<class ToTy>
2009 struct cast_convert_val<ToTy,
2010  const ::clang::DeclContext,const ::clang::DeclContext> {
2011  static const ToTy &doit(const ::clang::DeclContext &Val) {
2013  }
2014 };
2015 
2016 template<class ToTy>
2017 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2018  static ToTy &doit(::clang::DeclContext &Val) {
2020  }
2021 };
2022 
2023 template<class ToTy>
2024 struct cast_convert_val<ToTy,
2025  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2026  static const ToTy *doit(const ::clang::DeclContext *Val) {
2027  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2028  }
2029 };
2030 
2031 template<class ToTy>
2032 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2033  static ToTy *doit(::clang::DeclContext *Val) {
2034  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2035  }
2036 };
2037 
2038 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2039 template<class FromTy>
2040 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2041  static ::clang::DeclContext &doit(const FromTy &Val) {
2042  return *FromTy::castToDeclContext(&Val);
2043  }
2044 };
2045 
2046 template<class FromTy>
2047 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2048  static ::clang::DeclContext *doit(const FromTy *Val) {
2049  return FromTy::castToDeclContext(Val);
2050  }
2051 };
2052 
2053 template<class FromTy>
2054 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2055  static const ::clang::DeclContext &doit(const FromTy &Val) {
2056  return *FromTy::castToDeclContext(&Val);
2057  }
2058 };
2059 
2060 template<class FromTy>
2061 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2062  static const ::clang::DeclContext *doit(const FromTy *Val) {
2063  return FromTy::castToDeclContext(Val);
2064  }
2065 };
2066 
2067 } // namespace llvm
2068 
2069 #endif // LLVM_CLANG_AST_DECLBASE_H
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:962
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:1930
specific_decl_iterator & operator++()
Definition: DeclBase.h:1649
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:553
Represents a function declaration or definition.
Definition: Decl.h:1714
redecl_iterator operator++(int)
Definition: DeclBase.h:927
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:876
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:1597
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:942
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:757
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:239
__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:844
bool isClosure() const
Definition: DeclBase.h:1374
bool isLookupContext() const
Test whether the context supports looking up names.
Definition: DeclBase.h:1402
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:984
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:474
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
attr_iterator attr_begin() const
Definition: DeclBase.h:499
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:523
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3147
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:330
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:54
friend bool operator==(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1661
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:1640
Not a friend object.
Definition: DeclBase.h:1099
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:958
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2002
bool isObjCContainer() const
Definition: DeclBase.h:1378
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
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:1919
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1978
SourceLocation getLocEnd() const LLVM_READONLY
Definition: DeclBase.h:413
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:1907
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:1682
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:797
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:952
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:320
redecl_iterator & operator++()
Definition: DeclBase.h:918
reference back() const
Definition: DeclBase.h:1237
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:213
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:752
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1586
reference front() const
Definition: DeclBase.h:1236
bool isInvalidDecl() const
Definition: DeclBase.h:547
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1666
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:736
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:24
Decl(Kind DK, EmptyShell Empty)
Definition: DeclBase.h:377
void setHasExternalVisibleStorage(bool ES=true)
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:1911
value_type operator->() const
Definition: DeclBase.h:1560
Represents a struct/union/class.
Definition: Decl.h:3548
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:87
One of these records is kept for each identifier that is lexed.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:150
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1188
attr_iterator attr_end() const
Definition: DeclBase.h:502
specific_decl_iterator operator++(int)
Definition: DeclBase.h:1655
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1582
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:909
bool isNamespace() const
Definition: DeclBase.h:1419
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:778
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:405
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:628
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:853
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:801
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1461
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:323
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:528
Describes a module or submodule.
Definition: Module.h:65
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;deprecated&#39;.
Definition: DeclBase.h:669
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1742
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1218
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:807
static void dump(llvm::raw_ostream &OS, StringRef FunctionName, ArrayRef< CounterExpression > Expressions, ArrayRef< CounterMappingRegion > Regions)
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:831
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:784
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1551
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:1718
static bool isStdNamespace(const DeclContext *DC)
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1628
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1241
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:1882
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1159
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:826
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1627
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:744
Represents a linkage specification.
Definition: DeclCXX.h:2809
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2048
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:896
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:395
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:875
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:72
NodeId Parent
Definition: ASTDiff.cpp:192
Decl * getNextDeclInContext()
Definition: DeclBase.h:423
bool hasAttr() const
Definition: DeclBase.h:536
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:102
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:1863
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:1594
std::ptrdiff_t difference_type
Definition: DeclBase.h:910
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1366
const Decl * getNonClosureContext() const
Definition: DeclBase.h:441
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1357
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:881
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:1833
static bool classofKind(Kind K)
Definition: DeclBase.h:1124
const FunctionProtoType * T
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:1890
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:552
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:727
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:973
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1201
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:424
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1058
bool isFileContext() const
Definition: DeclBase.h:1407
DeclContext * getDeclContext()
Definition: DeclBase.h:426
SourceLocation Begin
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
redecl_iterator redecls_end() const
Definition: DeclBase.h:954
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:1965
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:619
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:493
const DeclContext * getParent() const
Definition: DeclBase.h:1344
bool isFunctionOrMethod() const
Definition: DeclBase.h:1390
reference operator[](size_t N) const
Definition: DeclBase.h:1238
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1341
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:418
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1030
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:326
const SourceManager & SM
Definition: Format.cpp:1468
const DeclContext * getDeclContext() const
Definition: DeclBase.h:431
SmallVector< Attr *, 4 > AttrVec
AttrVec - A vector of Attr, which is how they are stored on the AST.
Definition: AttrIterator.h:49
reference operator*() const
Definition: DeclBase.h:915
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1108
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:811
AttrVec & getAttrs()
Definition: DeclBase.h:478
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:990
bool hasAttrs() const
Definition: DeclBase.h:472
filtered_decl_iterator & operator++()
Definition: DeclBase.h:1725
void addAttr(Attr *A)
Definition: DeclBase.h:485
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2062
iterator::reference reference
Definition: DeclBase.h:1228
Abstract interface for external sources of AST nodes.
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:409
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1334
#define false
Definition: stdbool.h:33
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:900
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:591
all_lookups_iterator - An iterator that provides a view over the results of looking up every possible...
Definition: DeclLookups.h:29
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:789
void setReferenced(bool R=true)
Definition: DeclBase.h:582
static bool classof(const DeclContext *D)
Definition: DeclBase.h:1935
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1706
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:1858
bool hasCachedLinkage() const
Definition: DeclBase.h:399
A friend of a previously-declared entity.
Definition: DeclBase.h:1100
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1203
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:1897
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2041
Linkage getCachedLinkage() const
Definition: DeclBase.h:391
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:700
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:933
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:1870
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:888
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1990
decl_iterator noload_decls_end() const
Definition: DeclBase.h:1598
__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:1543
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:580
redecl_iterator redecls_begin() const
Definition: DeclBase.h:950
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:946
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1974
Dataflow Directional Tag Classes.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:399
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:587
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:977
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1016
bool isRecord() const
Definition: DeclBase.h:1415
attr_range attrs() const
Definition: DeclBase.h:495
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:937
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:354
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:492
AccessSpecifier getAccess() const
Definition: DeclBase.h:461
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:115
DeclarationName - The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:420
decl_iterator operator++(int)
Definition: DeclBase.h:1567
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1473
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:772
void setHasExternalLexicalStorage(bool ES=true)
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:1901
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:1606
void setObjectOfFriendDecl(bool PerformFriendInjection=false)
Changes the namespace of this declaration to reflect that it&#39;s the object of a friend declaration...
Definition: DeclBase.h:1069
A dependently-generated diagnostic.
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it&#39;s a function-local extern declaration...
Definition: DeclBase.h:1040
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1504
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:567
static bool classof(const OMPClause *T)
Imports selected nodes from one AST context into another context, merging AST nodes where appropriate...
Definition: ASTImporter.h:48
static bool isFunctionOrMethod(const Decl *D)
isFunctionOrMethod - Return true if the given decl has function type (function or function-typed vari...
void setNonMemberOperator()
Specifies that this declaration is a C++ overloaded non-member.
Definition: DeclBase.h:1117
T * getAttr() const
Definition: DeclBase.h:532
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:712
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:1731
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1360
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:704
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1227
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:518
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2055
Defines the clang::SourceLocation class and associated facilities.
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: DeclBase.h:967
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1737
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:195
decl_iterator & operator++()
Definition: DeclBase.h:1562
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1178
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1498
value_type operator->() const
Definition: DeclBase.h:916
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1484
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:367
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:892
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:103
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1986
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1370
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:89
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:930
The top declaration context.
Definition: Decl.h:107
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1120
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1573
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:468
#define true
Definition: stdbool.h:32
bool setUseQualifiedLookup(bool use=true)
Definition: DeclBase.h:1924
A trivial tuple used to represent a source range.
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:601
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1411
void dropAttr()
Definition: DeclBase.h:507
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:456
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:446
Represents C++ using-directive.
Definition: DeclCXX.h:2909
SourceLocation getBegin() const
This class handles loading and caching of source files into memory.
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:417
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1577
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1492
DeclContext(Decl::Kind K)
Definition: DeclBase.h:1324
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:678
decl_iterator decls_end() const
Definition: DeclBase.h:1588
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1705
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:869
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1171