clang  7.0.0
DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the Decl and DeclContext interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_AST_DECLBASE_H
15 #define LLVM_CLANG_AST_DECLBASE_H
16 
17 #include "clang/AST/AttrIterator.h"
19 #include "clang/Basic/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 alignas(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.
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.
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.
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.
176 
177  /// This declaration is an OpenMP user defined reduction construction.
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.
197  OBJC_TQ_In = 0x1,
199  OBJC_TQ_Out = 0x4,
203 
204  /// The nullability qualifier is set when the nullability of the
205  /// result or parameter was expressed via a context-sensitive
206  /// keyword.
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 ASTNodeImporter;
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  }
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),
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),
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 { return getBeginLoc(); }
410  SourceLocation getBeginLoc() const LLVM_READONLY {
411  return getSourceRange().getBegin();
412  }
413 
414  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
415  SourceLocation getEndLoc() const LLVM_READONLY {
416  return getSourceRange().getEnd();
417  }
418 
419  SourceLocation getLocation() const { return Loc; }
420  void setLocation(SourceLocation L) { Loc = L; }
421 
422  Kind getKind() const { return static_cast<Kind>(DeclKind); }
423  const char *getDeclKindName() const;
424 
425  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
426  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
427 
429  if (isInSemaDC())
430  return getSemanticDC();
431  return getMultipleDC()->SemanticDC;
432  }
433  const DeclContext *getDeclContext() const {
434  return const_cast<Decl*>(this)->getDeclContext();
435  }
436 
437  /// Find the innermost non-closure ancestor of this declaration,
438  /// walking up through blocks, lambdas, etc. If that ancestor is
439  /// not a code context (!isFunctionOrMethod()), returns null.
440  ///
441  /// A declaration may be its own non-closure context.
443  const Decl *getNonClosureContext() const {
444  return const_cast<Decl*>(this)->getNonClosureContext();
445  }
446 
449  return const_cast<Decl*>(this)->getTranslationUnitDecl();
450  }
451 
452  bool isInAnonymousNamespace() const;
453 
454  bool isInStdNamespace() const;
455 
456  ASTContext &getASTContext() const LLVM_READONLY;
457 
459  Access = AS;
460  assert(AccessDeclContextSanity());
461  }
462 
464  assert(AccessDeclContextSanity());
465  return AccessSpecifier(Access);
466  }
467 
468  /// Retrieve the access specifier for this declaration, even though
469  /// it may not yet have been properly set.
471  return AccessSpecifier(Access);
472  }
473 
474  bool hasAttrs() const { return HasAttrs; }
475 
476  void setAttrs(const AttrVec& Attrs) {
477  return setAttrsImpl(Attrs, getASTContext());
478  }
479 
481  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
482  }
483 
484  const AttrVec &getAttrs() const;
485  void dropAttrs();
486 
487  void addAttr(Attr *A) {
488  if (hasAttrs())
489  getAttrs().push_back(A);
490  else
491  setAttrs(AttrVec(1, A));
492  }
493 
494  using attr_iterator = AttrVec::const_iterator;
495  using attr_range = llvm::iterator_range<attr_iterator>;
496 
497  attr_range attrs() const {
498  return attr_range(attr_begin(), attr_end());
499  }
500 
502  return hasAttrs() ? getAttrs().begin() : nullptr;
503  }
505  return hasAttrs() ? getAttrs().end() : nullptr;
506  }
507 
508  template <typename T>
509  void dropAttr() {
510  if (!HasAttrs) return;
511 
512  AttrVec &Vec = getAttrs();
513  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
514 
515  if (Vec.empty())
516  HasAttrs = false;
517  }
518 
519  template <typename T>
520  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
521  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
522  }
523 
524  template <typename T>
527  }
528 
529  template <typename T>
532  }
533 
534  template<typename T> T *getAttr() const {
535  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
536  }
537 
538  template<typename T> bool hasAttr() const {
539  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
540  }
541 
542  /// getMaxAlignment - return the maximum alignment specified by attributes
543  /// on this decl, 0 if there are none.
544  unsigned getMaxAlignment() const;
545 
546  /// setInvalidDecl - Indicates the Decl had a semantic error. This
547  /// allows for graceful error recovery.
548  void setInvalidDecl(bool Invalid = true);
549  bool isInvalidDecl() const { return (bool) InvalidDecl; }
550 
551  /// isImplicit - Indicates whether the declaration was implicitly
552  /// generated by the implementation. If false, this declaration
553  /// was written explicitly in the source code.
554  bool isImplicit() const { return Implicit; }
555  void setImplicit(bool I = true) { Implicit = I; }
556 
557  /// Whether *any* (re-)declaration of the entity was used, meaning that
558  /// a definition is required.
559  ///
560  /// \param CheckUsedAttr When true, also consider the "used" attribute
561  /// (in addition to the "used" bit set by \c setUsed()) when determining
562  /// whether the function is used.
563  bool isUsed(bool CheckUsedAttr = true) const;
564 
565  /// Set whether the declaration is used, in the sense of odr-use.
566  ///
567  /// This should only be used immediately after creating a declaration.
568  /// It intentionally doesn't notify any listeners.
569  void setIsUsed() { getCanonicalDecl()->Used = true; }
570 
571  /// Mark the declaration used, in the sense of odr-use.
572  ///
573  /// This notifies any mutation listeners in addition to setting a bit
574  /// indicating the declaration is used.
575  void markUsed(ASTContext &C);
576 
577  /// Whether any declaration of this entity was referenced.
578  bool isReferenced() const;
579 
580  /// Whether this declaration was referenced. This should not be relied
581  /// upon for anything other than debugging.
582  bool isThisDeclarationReferenced() const { return Referenced; }
583 
584  void setReferenced(bool R = true) { Referenced = R; }
585 
586  /// Whether this declaration is a top-level declaration (function,
587  /// global variable, etc.) that is lexically inside an objc container
588  /// definition.
590  return TopLevelDeclInObjCContainer;
591  }
592 
593  void setTopLevelDeclInObjCContainer(bool V = true) {
594  TopLevelDeclInObjCContainer = V;
595  }
596 
597  /// Looks on this and related declarations for an applicable
598  /// external source symbol attribute.
599  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
600 
601  /// Whether this declaration was marked as being private to the
602  /// module in which it was defined.
603  bool isModulePrivate() const {
605  }
606 
607  /// Whether this declaration is exported (by virtue of being lexically
608  /// within an ExportDecl or by being a NamespaceDecl).
609  bool isExported() const;
610 
611  /// Return true if this declaration has an attribute which acts as
612  /// definition of the entity, such as 'alias' or 'ifunc'.
613  bool hasDefiningAttr() const;
614 
615  /// Return this declaration's defining attribute if it has one.
616  const Attr *getDefiningAttr() const;
617 
618 protected:
619  /// Specify that this declaration was marked as being private
620  /// to the module in which it was defined.
622  // The module-private specifier has no effect on unowned declarations.
623  // FIXME: We should track this in some way for source fidelity.
625  return;
627  }
628 
629  /// Set the owning module ID.
630  void setOwningModuleID(unsigned ID) {
631  assert(isFromASTFile() && "Only works on a deserialized declaration");
632  *((unsigned*)this - 2) = ID;
633  }
634 
635 public:
636  /// Determine the availability of the given declaration.
637  ///
638  /// This routine will determine the most restrictive availability of
639  /// the given declaration (e.g., preferring 'unavailable' to
640  /// 'deprecated').
641  ///
642  /// \param Message If non-NULL and the result is not \c
643  /// AR_Available, will be set to a (possibly empty) message
644  /// describing why the declaration has not been introduced, is
645  /// deprecated, or is unavailable.
646  ///
647  /// \param EnclosingVersion The version to compare with. If empty, assume the
648  /// deployment target version.
649  ///
650  /// \param RealizedPlatform If non-NULL and the availability result is found
651  /// in an available attribute it will set to the platform which is written in
652  /// the available attribute.
654  getAvailability(std::string *Message = nullptr,
655  VersionTuple EnclosingVersion = VersionTuple(),
656  StringRef *RealizedPlatform = nullptr) const;
657 
658  /// Retrieve the version of the target platform in which this
659  /// declaration was introduced.
660  ///
661  /// \returns An empty version tuple if this declaration has no 'introduced'
662  /// availability attributes, or the version tuple that's specified in the
663  /// attribute otherwise.
664  VersionTuple getVersionIntroduced() const;
665 
666  /// Determine whether this declaration is marked 'deprecated'.
667  ///
668  /// \param Message If non-NULL and the declaration is deprecated,
669  /// this will be set to the message describing why the declaration
670  /// was deprecated (which may be empty).
671  bool isDeprecated(std::string *Message = nullptr) const {
672  return getAvailability(Message) == AR_Deprecated;
673  }
674 
675  /// Determine whether this declaration is marked 'unavailable'.
676  ///
677  /// \param Message If non-NULL and the declaration is unavailable,
678  /// this will be set to the message describing why the declaration
679  /// was made unavailable (which may be empty).
680  bool isUnavailable(std::string *Message = nullptr) const {
681  return getAvailability(Message) == AR_Unavailable;
682  }
683 
684  /// Determine whether this is a weak-imported symbol.
685  ///
686  /// Weak-imported symbols are typically marked with the
687  /// 'weak_import' attribute, but may also be marked with an
688  /// 'availability' attribute where we're targing a platform prior to
689  /// the introduction of this feature.
690  bool isWeakImported() const;
691 
692  /// Determines whether this symbol can be weak-imported,
693  /// e.g., whether it would be well-formed to add the weak_import
694  /// attribute.
695  ///
696  /// \param IsDefinition Set to \c true to indicate that this
697  /// declaration cannot be weak-imported because it has a definition.
698  bool canBeWeakImported(bool &IsDefinition) const;
699 
700  /// Determine whether this declaration came from an AST file (such as
701  /// a precompiled header or module) rather than having been parsed.
702  bool isFromASTFile() const { return FromASTFile; }
703 
704  /// Retrieve the global declaration ID associated with this
705  /// declaration, which specifies where this Decl was loaded from.
706  unsigned getGlobalID() const {
707  if (isFromASTFile())
708  return *((const unsigned*)this - 1);
709  return 0;
710  }
711 
712  /// Retrieve the global ID of the module that owns this particular
713  /// declaration.
714  unsigned getOwningModuleID() const {
715  if (isFromASTFile())
716  return *((const unsigned*)this - 2);
717  return 0;
718  }
719 
720 private:
721  Module *getOwningModuleSlow() const;
722 
723 protected:
724  bool hasLocalOwningModuleStorage() const;
725 
726 public:
727  /// Get the imported owning module, if this decl is from an imported
728  /// (non-local) module.
730  if (!isFromASTFile() || !hasOwningModule())
731  return nullptr;
732 
733  return getOwningModuleSlow();
734  }
735 
736  /// Get the local owning module, if known. Returns nullptr if owner is
737  /// not yet known or declaration is not from a module.
739  if (isFromASTFile() || !hasOwningModule())
740  return nullptr;
741 
742  assert(hasLocalOwningModuleStorage() &&
743  "owned local decl but no local module storage");
744  return reinterpret_cast<Module *const *>(this)[-1];
745  }
747  assert(!isFromASTFile() && hasOwningModule() &&
749  "should not have a cached owning module");
750  reinterpret_cast<Module **>(this)[-1] = M;
751  }
752 
753  /// Is this declaration owned by some module?
754  bool hasOwningModule() const {
756  }
757 
758  /// Get the module that owns this declaration (for visibility purposes).
761  }
762 
763  /// Get the module that owns this declaration for linkage purposes.
764  /// There only ever is such a module under the C++ Modules TS.
765  ///
766  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
767  /// all declarations in a global module fragment are unowned.
768  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
769 
770  /// Determine whether this declaration might be hidden from name
771  /// lookup. Note that the declaration might be visible even if this returns
772  /// \c false, if the owning module is visible within the query context.
773  // FIXME: Rename this to make it clearer what it does.
774  bool isHidden() const {
776  }
777 
778  /// Set that this declaration is globally visible, even if it came from a
779  /// module that is not visible.
781  if (isHidden())
783  }
784 
785  /// Get the kind of module ownership for this declaration.
787  return NextInContextAndBits.getInt();
788  }
789 
790  /// Set whether this declaration is hidden from name lookup.
795  "no storage available for owning module for this declaration");
796  NextInContextAndBits.setInt(MOK);
797  }
798 
799  unsigned getIdentifierNamespace() const {
800  return IdentifierNamespace;
801  }
802 
803  bool isInIdentifierNamespace(unsigned NS) const {
804  return getIdentifierNamespace() & NS;
805  }
806 
807  static unsigned getIdentifierNamespaceForKind(Kind DK);
808 
811  }
812 
813  static bool isTagIdentifierNamespace(unsigned NS) {
814  // TagDecls have Tag and Type set and may also have TagFriend.
815  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
816  }
817 
818  /// getLexicalDeclContext - The declaration context where this Decl was
819  /// lexically declared (LexicalDC). May be different from
820  /// getDeclContext() (SemanticDC).
821  /// e.g.:
822  ///
823  /// namespace A {
824  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
825  /// }
826  /// void A::f(); // SemanticDC == namespace 'A'
827  /// // LexicalDC == global namespace
829  if (isInSemaDC())
830  return getSemanticDC();
831  return getMultipleDC()->LexicalDC;
832  }
834  return const_cast<Decl*>(this)->getLexicalDeclContext();
835  }
836 
837  /// Determine whether this declaration is declared out of line (outside its
838  /// semantic context).
839  virtual bool isOutOfLine() const;
840 
841  /// setDeclContext - Set both the semantic and lexical DeclContext
842  /// to DC.
843  void setDeclContext(DeclContext *DC);
844 
846 
847  /// Determine whether this declaration is a templated entity (whether it is
848  // within the scope of a template parameter).
849  bool isTemplated() const;
850 
851  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
852  /// scoped decl is defined outside the current function or method. This is
853  /// roughly global variables and functions, but also handles enums (which
854  /// could be defined inside or outside a function etc).
856  return getParentFunctionOrMethod() == nullptr;
857  }
858 
859  /// Returns true if this declaration lexically is inside a function.
860  /// It recognizes non-defining declarations as well as members of local
861  /// classes:
862  /// \code
863  /// void foo() { void bar(); }
864  /// void foo2() { class ABC { void bar(); }; }
865  /// \endcode
867 
868  /// If this decl is defined inside a function/method/block it returns
869  /// the corresponding DeclContext, otherwise it returns null.
870  const DeclContext *getParentFunctionOrMethod() const;
872  return const_cast<DeclContext*>(
873  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
874  }
875 
876  /// Retrieves the "canonical" declaration of the given declaration.
877  virtual Decl *getCanonicalDecl() { return this; }
878  const Decl *getCanonicalDecl() const {
879  return const_cast<Decl*>(this)->getCanonicalDecl();
880  }
881 
882  /// Whether this particular Decl is a canonical one.
883  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
884 
885 protected:
886  /// Returns the next redeclaration or itself if this is the only decl.
887  ///
888  /// Decl subclasses that can be redeclared should override this method so that
889  /// Decl::redecl_iterator can iterate over them.
890  virtual Decl *getNextRedeclarationImpl() { return this; }
891 
892  /// Implementation of getPreviousDecl(), to be overridden by any
893  /// subclass that has a redeclaration chain.
894  virtual Decl *getPreviousDeclImpl() { return nullptr; }
895 
896  /// Implementation of getMostRecentDecl(), to be overridden by any
897  /// subclass that has a redeclaration chain.
898  virtual Decl *getMostRecentDeclImpl() { return this; }
899 
900 public:
901  /// Iterates through all the redeclarations of the same decl.
903  /// Current - The current declaration.
904  Decl *Current = nullptr;
905  Decl *Starter;
906 
907  public:
908  using value_type = Decl *;
909  using reference = const value_type &;
910  using pointer = const value_type *;
911  using iterator_category = std::forward_iterator_tag;
913 
914  redecl_iterator() = default;
915  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
916 
917  reference operator*() const { return Current; }
918  value_type operator->() const { return Current; }
919 
921  assert(Current && "Advancing while iterator has reached end");
922  // Get either previous decl or latest decl.
923  Decl *Next = Current->getNextRedeclarationImpl();
924  assert(Next && "Should return next redeclaration or itself, never null!");
925  Current = (Next != Starter) ? Next : nullptr;
926  return *this;
927  }
928 
930  redecl_iterator tmp(*this);
931  ++(*this);
932  return tmp;
933  }
934 
936  return x.Current == y.Current;
937  }
938 
940  return x.Current != y.Current;
941  }
942  };
943 
944  using redecl_range = llvm::iterator_range<redecl_iterator>;
945 
946  /// Returns an iterator range for all the redeclarations of the same
947  /// decl. It will iterate at least once (when this decl is the only one).
950  }
951 
953  return redecl_iterator(const_cast<Decl *>(this));
954  }
955 
957 
958  /// Retrieve the previous declaration that declares the same entity
959  /// as this declaration, or NULL if there is no previous declaration.
961 
962  /// Retrieve the most recent declaration that declares the same entity
963  /// as this declaration, or NULL if there is no previous declaration.
964  const Decl *getPreviousDecl() const {
965  return const_cast<Decl *>(this)->getPreviousDeclImpl();
966  }
967 
968  /// True if this is the first declaration in its redeclaration chain.
969  bool isFirstDecl() const {
970  return getPreviousDecl() == nullptr;
971  }
972 
973  /// Retrieve the most recent declaration that declares the same entity
974  /// as this declaration (which may be this declaration).
976 
977  /// Retrieve the most recent declaration that declares the same entity
978  /// as this declaration (which may be this declaration).
979  const Decl *getMostRecentDecl() const {
980  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
981  }
982 
983  /// getBody - If this Decl represents a declaration for a body of code,
984  /// such as a function or method definition, this method returns the
985  /// top-level Stmt* of that body. Otherwise this method returns null.
986  virtual Stmt* getBody() const { return nullptr; }
987 
988  /// Returns true if this \c Decl represents a declaration for a body of
989  /// code, such as a function or method definition.
990  /// Note that \c hasBody can also return true if any redeclaration of this
991  /// \c Decl represents a declaration for a body of code.
992  virtual bool hasBody() const { return getBody() != nullptr; }
993 
994  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
995  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
997 
998  // global temp stats (until we have a per-module visitor)
999  static void add(Kind k);
1000  static void EnableStatistics();
1001  static void PrintStats();
1002 
1003  /// isTemplateParameter - Determines whether this declaration is a
1004  /// template parameter.
1005  bool isTemplateParameter() const;
1006 
1007  /// isTemplateParameter - Determines whether this declaration is a
1008  /// template parameter pack.
1009  bool isTemplateParameterPack() const;
1010 
1011  /// Whether this declaration is a parameter pack.
1012  bool isParameterPack() const;
1013 
1014  /// returns true if this declaration is a template
1015  bool isTemplateDecl() const;
1016 
1017  /// Whether this declaration is a function or function template.
1019  return (DeclKind >= Decl::firstFunction &&
1020  DeclKind <= Decl::lastFunction) ||
1021  DeclKind == FunctionTemplate;
1022  }
1023 
1024  /// If this is a declaration that describes some template, this
1025  /// method returns that template declaration.
1027 
1028  /// Returns the function itself, or the templated function if this is a
1029  /// function template.
1030  FunctionDecl *getAsFunction() LLVM_READONLY;
1031 
1032  const FunctionDecl *getAsFunction() const {
1033  return const_cast<Decl *>(this)->getAsFunction();
1034  }
1035 
1036  /// Changes the namespace of this declaration to reflect that it's
1037  /// a function-local extern declaration.
1038  ///
1039  /// These declarations appear in the lexical context of the extern
1040  /// declaration, but in the semantic context of the enclosing namespace
1041  /// scope.
1043  Decl *Prev = getPreviousDecl();
1045 
1046  // It's OK for the declaration to still have the "invisible friend" flag or
1047  // the "conflicts with tag declarations in this scope" flag for the outer
1048  // scope.
1049  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1050  "namespace is not ordinary");
1051 
1053  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1055  }
1056 
1057  /// Determine whether this is a block-scope declaration with linkage.
1058  /// This will either be a local variable declaration declared 'extern', or a
1059  /// local function declaration.
1062  }
1063 
1064  /// Changes the namespace of this declaration to reflect that it's
1065  /// the object of a friend declaration.
1066  ///
1067  /// These declarations appear in the lexical context of the friending
1068  /// class, but in the semantic context of the actual entity. This property
1069  /// applies only to a specific decl object; other redeclarations of the
1070  /// same entity may not (and probably don't) share this property.
1071  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1072  unsigned OldNS = IdentifierNamespace;
1073  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1075  IDNS_LocalExtern)) &&
1076  "namespace includes neither ordinary nor tag");
1077  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1079  IDNS_LocalExtern)) &&
1080  "namespace includes other than ordinary or tag");
1081 
1082  Decl *Prev = getPreviousDecl();
1084 
1085  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1087  if (PerformFriendInjection ||
1088  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1090  }
1091 
1094  if (PerformFriendInjection ||
1095  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1097  }
1098  }
1099 
1101  FOK_None, ///< Not a friend object.
1102  FOK_Declared, ///< A friend of a previously-declared entity.
1103  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1104  };
1105 
1106  /// Determines whether this declaration is the object of a
1107  /// friend declaration and, if so, what kind.
1108  ///
1109  /// There is currently no direct way to find the associated FriendDecl.
1111  unsigned mask =
1113  if (!mask) return FOK_None;
1115  : FOK_Undeclared);
1116  }
1117 
1118  /// Specifies that this declaration is a C++ overloaded non-member.
1120  assert(getKind() == Function || getKind() == FunctionTemplate);
1121  assert((IdentifierNamespace & IDNS_Ordinary) &&
1122  "visible non-member operators should be in ordinary namespace");
1124  }
1125 
1126  static bool classofKind(Kind K) { return true; }
1127  static DeclContext *castToDeclContext(const Decl *);
1128  static Decl *castFromDeclContext(const DeclContext *);
1129 
1130  void print(raw_ostream &Out, unsigned Indentation = 0,
1131  bool PrintInstantiation = false) const;
1132  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1133  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1134  static void printGroup(Decl** Begin, unsigned NumDecls,
1135  raw_ostream &Out, const PrintingPolicy &Policy,
1136  unsigned Indentation = 0);
1137 
1138  // Debuggers don't usually respect default arguments.
1139  void dump() const;
1140 
1141  // Same as dump(), but forces color printing.
1142  void dumpColor() const;
1143 
1144  void dump(raw_ostream &Out, bool Deserialize = false) const;
1145 
1146  /// Looks through the Decl's underlying type to extract a FunctionType
1147  /// when possible. Will return null if the type underlying the Decl does not
1148  /// have a FunctionType.
1149  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1150 
1151 private:
1152  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1153  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1154  ASTContext &Ctx);
1155 
1156 protected:
1158 };
1159 
1160 /// Determine whether two declarations declare the same entity.
1161 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1162  if (!D1 || !D2)
1163  return false;
1164 
1165  if (D1 == D2)
1166  return true;
1167 
1168  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1169 }
1170 
1171 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1172 /// doing something to a specific decl.
1173 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1174  const Decl *TheDecl;
1175  SourceLocation Loc;
1176  SourceManager &SM;
1177  const char *Message;
1178 
1179 public:
1181  SourceManager &sm, const char *Msg)
1182  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1183 
1184  void print(raw_ostream &OS) const override;
1185 };
1186 
1187 /// The results of name lookup within a DeclContext. This is either a
1188 /// single result (with no stable storage) or a collection of results (with
1189 /// stable storage provided by the lookup table).
1192 
1193  ResultTy Result;
1194 
1195  // If there is only one lookup result, it would be invalidated by
1196  // reallocations of the name table, so store it separately.
1197  NamedDecl *Single = nullptr;
1198 
1199  static NamedDecl *const SingleElementDummyList;
1200 
1201 public:
1202  DeclContextLookupResult() = default;
1204  : Result(Result) {}
1206  : Result(SingleElementDummyList), Single(Single) {}
1207 
1208  class iterator;
1209 
1210  using IteratorBase =
1211  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1212  std::random_access_iterator_tag,
1213  NamedDecl *const>;
1214 
1215  class iterator : public IteratorBase {
1216  value_type SingleElement;
1217 
1218  public:
1219  iterator() = default;
1220  explicit iterator(pointer Pos, value_type Single = nullptr)
1221  : IteratorBase(Pos), SingleElement(Single) {}
1222 
1224  return SingleElement ? SingleElement : IteratorBase::operator*();
1225  }
1226  };
1227 
1228  using const_iterator = iterator;
1229  using pointer = iterator::pointer;
1230  using reference = iterator::reference;
1231 
1232  iterator begin() const { return iterator(Result.begin(), Single); }
1233  iterator end() const { return iterator(Result.end(), Single); }
1234 
1235  bool empty() const { return Result.empty(); }
1236  pointer data() const { return Single ? &Single : Result.data(); }
1237  size_t size() const { return Single ? 1 : Result.size(); }
1238  reference front() const { return Single ? Single : Result.front(); }
1239  reference back() const { return Single ? Single : Result.back(); }
1240  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1241 
1242  // FIXME: Remove this from the interface
1243  DeclContextLookupResult slice(size_t N) const {
1244  DeclContextLookupResult Sliced = Result.slice(N);
1245  Sliced.Single = Single;
1246  return Sliced;
1247  }
1248 };
1249 
1250 /// DeclContext - This is used only as base class of specific decl types that
1251 /// can act as declaration contexts. These decls are (only the top classes
1252 /// that directly derive from DeclContext are mentioned, not their subclasses):
1253 ///
1254 /// TranslationUnitDecl
1255 /// NamespaceDecl
1256 /// FunctionDecl
1257 /// TagDecl
1258 /// ObjCMethodDecl
1259 /// ObjCContainerDecl
1260 /// LinkageSpecDecl
1261 /// ExportDecl
1262 /// BlockDecl
1263 /// OMPDeclareReductionDecl
1265  /// DeclKind - This indicates which class this is.
1266  unsigned DeclKind : 8;
1267 
1268  /// Whether this declaration context also has some external
1269  /// storage that contains additional declarations that are lexically
1270  /// part of this context.
1271  mutable bool ExternalLexicalStorage : 1;
1272 
1273  /// Whether this declaration context also has some external
1274  /// storage that contains additional declarations that are visible
1275  /// in this context.
1276  mutable bool ExternalVisibleStorage : 1;
1277 
1278  /// Whether this declaration context has had external visible
1279  /// storage added since the last lookup. In this case, \c LookupPtr's
1280  /// invariant may not hold and needs to be fixed before we perform
1281  /// another lookup.
1282  mutable bool NeedToReconcileExternalVisibleStorage : 1;
1283 
1284  /// If \c true, this context may have local lexical declarations
1285  /// that are missing from the lookup table.
1286  mutable bool HasLazyLocalLexicalLookups : 1;
1287 
1288  /// If \c true, the external source may have lexical declarations
1289  /// that are missing from the lookup table.
1290  mutable bool HasLazyExternalLexicalLookups : 1;
1291 
1292  /// If \c true, lookups should only return identifier from
1293  /// DeclContext scope (for example TranslationUnit). Used in
1294  /// LookupQualifiedName()
1295  mutable bool UseQualifiedLookup : 1;
1296 
1297  /// Pointer to the data structure used to lookup declarations
1298  /// within this context (or a DependentStoredDeclsMap if this is a
1299  /// dependent context). We maintain the invariant that, if the map
1300  /// contains an entry for a DeclarationName (and we haven't lazily
1301  /// omitted anything), then it contains all relevant entries for that
1302  /// name (modulo the hasExternalDecls() flag).
1303  mutable StoredDeclsMap *LookupPtr = nullptr;
1304 
1305 protected:
1306  friend class ASTDeclReader;
1307  friend class ASTWriter;
1308  friend class ExternalASTSource;
1309 
1310  /// FirstDecl - The first declaration stored within this declaration
1311  /// context.
1312  mutable Decl *FirstDecl = nullptr;
1313 
1314  /// LastDecl - The last declaration stored within this declaration
1315  /// context. FIXME: We could probably cache this value somewhere
1316  /// outside of the DeclContext, to reduce the size of DeclContext by
1317  /// another pointer.
1318  mutable Decl *LastDecl = nullptr;
1319 
1320  /// Build up a chain of declarations.
1321  ///
1322  /// \returns the first/last pair of declarations.
1323  static std::pair<Decl *, Decl *>
1324  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1325 
1327  : DeclKind(K), ExternalLexicalStorage(false),
1328  ExternalVisibleStorage(false),
1329  NeedToReconcileExternalVisibleStorage(false),
1330  HasLazyLocalLexicalLookups(false), HasLazyExternalLexicalLookups(false),
1331  UseQualifiedLookup(false) {}
1332 
1333 public:
1334  ~DeclContext();
1335 
1337  return static_cast<Decl::Kind>(DeclKind);
1338  }
1339 
1340  const char *getDeclKindName() const;
1341 
1342  /// getParent - Returns the containing DeclContext.
1344  return cast<Decl>(this)->getDeclContext();
1345  }
1346  const DeclContext *getParent() const {
1347  return const_cast<DeclContext*>(this)->getParent();
1348  }
1349 
1350  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1351  /// different from getParent, e.g.:
1352  ///
1353  /// namespace A {
1354  /// struct S;
1355  /// }
1356  /// struct A::S {}; // getParent() == namespace 'A'
1357  /// // getLexicalParent() == translation unit
1358  ///
1360  return cast<Decl>(this)->getLexicalDeclContext();
1361  }
1363  return const_cast<DeclContext*>(this)->getLexicalParent();
1364  }
1365 
1366  DeclContext *getLookupParent();
1367 
1368  const DeclContext *getLookupParent() const {
1369  return const_cast<DeclContext*>(this)->getLookupParent();
1370  }
1371 
1373  return cast<Decl>(this)->getASTContext();
1374  }
1375 
1376  bool isClosure() const {
1377  return DeclKind == Decl::Block;
1378  }
1379 
1380  bool isObjCContainer() const {
1381  switch (DeclKind) {
1382  case Decl::ObjCCategory:
1383  case Decl::ObjCCategoryImpl:
1384  case Decl::ObjCImplementation:
1385  case Decl::ObjCInterface:
1386  case Decl::ObjCProtocol:
1387  return true;
1388  }
1389  return false;
1390  }
1391 
1392  bool isFunctionOrMethod() const {
1393  switch (DeclKind) {
1394  case Decl::Block:
1395  case Decl::Captured:
1396  case Decl::ObjCMethod:
1397  return true;
1398  default:
1399  return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction;
1400  }
1401  }
1402 
1403  /// Test whether the context supports looking up names.
1404  bool isLookupContext() const {
1405  return !isFunctionOrMethod() && DeclKind != Decl::LinkageSpec &&
1406  DeclKind != Decl::Export;
1407  }
1408 
1409  bool isFileContext() const {
1410  return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace;
1411  }
1412 
1413  bool isTranslationUnit() const {
1414  return DeclKind == Decl::TranslationUnit;
1415  }
1416 
1417  bool isRecord() const {
1418  return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord;
1419  }
1420 
1421  bool isNamespace() const {
1422  return DeclKind == Decl::Namespace;
1423  }
1424 
1425  bool isStdNamespace() const;
1426 
1427  bool isInlineNamespace() const;
1428 
1429  /// Determines whether this context is dependent on a
1430  /// template parameter.
1431  bool isDependentContext() const;
1432 
1433  /// isTransparentContext - Determines whether this context is a
1434  /// "transparent" context, meaning that the members declared in this
1435  /// context are semantically declared in the nearest enclosing
1436  /// non-transparent (opaque) context but are lexically declared in
1437  /// this context. For example, consider the enumerators of an
1438  /// enumeration type:
1439  /// @code
1440  /// enum E {
1441  /// Val1
1442  /// };
1443  /// @endcode
1444  /// Here, E is a transparent context, so its enumerator (Val1) will
1445  /// appear (semantically) that it is in the same context of E.
1446  /// Examples of transparent contexts include: enumerations (except for
1447  /// C++0x scoped enums), and C++ linkage specifications.
1448  bool isTransparentContext() const;
1449 
1450  /// Determines whether this context or some of its ancestors is a
1451  /// linkage specification context that specifies C linkage.
1452  bool isExternCContext() const;
1453 
1454  /// Retrieve the nearest enclosing C linkage specification context.
1455  const LinkageSpecDecl *getExternCContext() const;
1456 
1457  /// Determines whether this context or some of its ancestors is a
1458  /// linkage specification context that specifies C++ linkage.
1459  bool isExternCXXContext() const;
1460 
1461  /// Determine whether this declaration context is equivalent
1462  /// to the declaration context DC.
1463  bool Equals(const DeclContext *DC) const {
1464  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1465  }
1466 
1467  /// Determine whether this declaration context encloses the
1468  /// declaration context DC.
1469  bool Encloses(const DeclContext *DC) const;
1470 
1471  /// Find the nearest non-closure ancestor of this context,
1472  /// i.e. the innermost semantic parent of this context which is not
1473  /// a closure. A context may be its own non-closure ancestor.
1474  Decl *getNonClosureAncestor();
1475  const Decl *getNonClosureAncestor() const {
1476  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1477  }
1478 
1479  /// getPrimaryContext - There may be many different
1480  /// declarations of the same entity (including forward declarations
1481  /// of classes, multiple definitions of namespaces, etc.), each with
1482  /// a different set of declarations. This routine returns the
1483  /// "primary" DeclContext structure, which will contain the
1484  /// information needed to perform name lookup into this context.
1485  DeclContext *getPrimaryContext();
1487  return const_cast<DeclContext*>(this)->getPrimaryContext();
1488  }
1489 
1490  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1491  /// other entities of the same name, or where it is a redeclaration if the
1492  /// two entities are compatible. This skips through transparent contexts.
1493  DeclContext *getRedeclContext();
1495  return const_cast<DeclContext *>(this)->getRedeclContext();
1496  }
1497 
1498  /// Retrieve the nearest enclosing namespace context.
1499  DeclContext *getEnclosingNamespaceContext();
1501  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1502  }
1503 
1504  /// Retrieve the outermost lexically enclosing record context.
1505  RecordDecl *getOuterLexicalRecordContext();
1507  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1508  }
1509 
1510  /// Test if this context is part of the enclosing namespace set of
1511  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1512  /// isn't a namespace, this is equivalent to Equals().
1513  ///
1514  /// The enclosing namespace set of a namespace is the namespace and, if it is
1515  /// inline, its enclosing namespace, recursively.
1516  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1517 
1518  /// Collects all of the declaration contexts that are semantically
1519  /// connected to this declaration context.
1520  ///
1521  /// For declaration contexts that have multiple semantically connected but
1522  /// syntactically distinct contexts, such as C++ namespaces, this routine
1523  /// retrieves the complete set of such declaration contexts in source order.
1524  /// For example, given:
1525  ///
1526  /// \code
1527  /// namespace N {
1528  /// int x;
1529  /// }
1530  /// namespace N {
1531  /// int y;
1532  /// }
1533  /// \endcode
1534  ///
1535  /// The \c Contexts parameter will contain both definitions of N.
1536  ///
1537  /// \param Contexts Will be cleared and set to the set of declaration
1538  /// contexts that are semanticaly connected to this declaration context,
1539  /// in source order, including this context (which may be the only result,
1540  /// for non-namespace contexts).
1541  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1542 
1543  /// decl_iterator - Iterates through the declarations stored
1544  /// within this context.
1546  /// Current - The current declaration.
1547  Decl *Current = nullptr;
1548 
1549  public:
1550  using value_type = Decl *;
1551  using reference = const value_type &;
1552  using pointer = const value_type *;
1553  using iterator_category = std::forward_iterator_tag;
1555 
1556  decl_iterator() = default;
1557  explicit decl_iterator(Decl *C) : Current(C) {}
1558 
1559  reference operator*() const { return Current; }
1560 
1561  // This doesn't meet the iterator requirements, but it's convenient
1562  value_type operator->() const { return Current; }
1563 
1565  Current = Current->getNextDeclInContext();
1566  return *this;
1567  }
1568 
1570  decl_iterator tmp(*this);
1571  ++(*this);
1572  return tmp;
1573  }
1574 
1576  return x.Current == y.Current;
1577  }
1578 
1580  return x.Current != y.Current;
1581  }
1582  };
1583 
1584  using decl_range = llvm::iterator_range<decl_iterator>;
1585 
1586  /// decls_begin/decls_end - Iterate over the declarations stored in
1587  /// this context.
1588  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1589  decl_iterator decls_begin() const;
1590  decl_iterator decls_end() const { return decl_iterator(); }
1591  bool decls_empty() const;
1592 
1593  /// noload_decls_begin/end - Iterate over the declarations stored in this
1594  /// context that are currently loaded; don't attempt to retrieve anything
1595  /// from an external source.
1597  return decl_range(noload_decls_begin(), noload_decls_end());
1598  }
1599  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
1601 
1602  /// specific_decl_iterator - Iterates over a subrange of
1603  /// declarations stored in a DeclContext, providing only those that
1604  /// are of type SpecificDecl (or a class derived from it). This
1605  /// iterator is used, for example, to provide iteration over just
1606  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
1607  template<typename SpecificDecl>
1609  /// Current - The current, underlying declaration iterator, which
1610  /// will either be NULL or will point to a declaration of
1611  /// type SpecificDecl.
1613 
1614  /// SkipToNextDecl - Advances the current position up to the next
1615  /// declaration of type SpecificDecl that also meets the criteria
1616  /// required by Acceptable.
1617  void SkipToNextDecl() {
1618  while (*Current && !isa<SpecificDecl>(*Current))
1619  ++Current;
1620  }
1621 
1622  public:
1623  using value_type = SpecificDecl *;
1624  // TODO: Add reference and pointer types (with some appropriate proxy type)
1625  // if we ever have a need for them.
1626  using reference = void;
1627  using pointer = void;
1628  using difference_type =
1629  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
1630  using iterator_category = std::forward_iterator_tag;
1631 
1632  specific_decl_iterator() = default;
1633 
1634  /// specific_decl_iterator - Construct a new iterator over a
1635  /// subset of the declarations the range [C,
1636  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1637  /// member function of SpecificDecl that should return true for
1638  /// all of the SpecificDecl instances that will be in the subset
1639  /// of iterators. For example, if you want Objective-C instance
1640  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1641  /// &ObjCMethodDecl::isInstanceMethod.
1643  SkipToNextDecl();
1644  }
1645 
1646  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1647 
1648  // This doesn't meet the iterator requirements, but it's convenient
1649  value_type operator->() const { return **this; }
1650 
1652  ++Current;
1653  SkipToNextDecl();
1654  return *this;
1655  }
1656 
1658  specific_decl_iterator tmp(*this);
1659  ++(*this);
1660  return tmp;
1661  }
1662 
1663  friend bool operator==(const specific_decl_iterator& x,
1664  const specific_decl_iterator& y) {
1665  return x.Current == y.Current;
1666  }
1667 
1668  friend bool operator!=(const specific_decl_iterator& x,
1669  const specific_decl_iterator& y) {
1670  return x.Current != y.Current;
1671  }
1672  };
1673 
1674  /// Iterates over a filtered subrange of declarations stored
1675  /// in a DeclContext.
1676  ///
1677  /// This iterator visits only those declarations that are of type
1678  /// SpecificDecl (or a class derived from it) and that meet some
1679  /// additional run-time criteria. This iterator is used, for
1680  /// example, to provide access to the instance methods within an
1681  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
1682  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
1683  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
1685  /// Current - The current, underlying declaration iterator, which
1686  /// will either be NULL or will point to a declaration of
1687  /// type SpecificDecl.
1689 
1690  /// SkipToNextDecl - Advances the current position up to the next
1691  /// declaration of type SpecificDecl that also meets the criteria
1692  /// required by Acceptable.
1693  void SkipToNextDecl() {
1694  while (*Current &&
1695  (!isa<SpecificDecl>(*Current) ||
1696  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
1697  ++Current;
1698  }
1699 
1700  public:
1701  using value_type = SpecificDecl *;
1702  // TODO: Add reference and pointer types (with some appropriate proxy type)
1703  // if we ever have a need for them.
1704  using reference = void;
1705  using pointer = void;
1706  using difference_type =
1707  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
1708  using iterator_category = std::forward_iterator_tag;
1709 
1710  filtered_decl_iterator() = default;
1711 
1712  /// filtered_decl_iterator - Construct a new iterator over a
1713  /// subset of the declarations the range [C,
1714  /// end-of-declarations). If A is non-NULL, it is a pointer to a
1715  /// member function of SpecificDecl that should return true for
1716  /// all of the SpecificDecl instances that will be in the subset
1717  /// of iterators. For example, if you want Objective-C instance
1718  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1719  /// &ObjCMethodDecl::isInstanceMethod.
1721  SkipToNextDecl();
1722  }
1723 
1724  value_type operator*() const { return cast<SpecificDecl>(*Current); }
1725  value_type operator->() const { return cast<SpecificDecl>(*Current); }
1726 
1728  ++Current;
1729  SkipToNextDecl();
1730  return *this;
1731  }
1732 
1734  filtered_decl_iterator tmp(*this);
1735  ++(*this);
1736  return tmp;
1737  }
1738 
1739  friend bool operator==(const filtered_decl_iterator& x,
1740  const filtered_decl_iterator& y) {
1741  return x.Current == y.Current;
1742  }
1743 
1744  friend bool operator!=(const filtered_decl_iterator& x,
1745  const filtered_decl_iterator& y) {
1746  return x.Current != y.Current;
1747  }
1748  };
1749 
1750  /// Add the declaration D into this context.
1751  ///
1752  /// This routine should be invoked when the declaration D has first
1753  /// been declared, to place D into the context where it was
1754  /// (lexically) defined. Every declaration must be added to one
1755  /// (and only one!) context, where it can be visited via
1756  /// [decls_begin(), decls_end()). Once a declaration has been added
1757  /// to its lexical context, the corresponding DeclContext owns the
1758  /// declaration.
1759  ///
1760  /// If D is also a NamedDecl, it will be made visible within its
1761  /// semantic context via makeDeclVisibleInContext.
1762  void addDecl(Decl *D);
1763 
1764  /// Add the declaration D into this context, but suppress
1765  /// searches for external declarations with the same name.
1766  ///
1767  /// Although analogous in function to addDecl, this removes an
1768  /// important check. This is only useful if the Decl is being
1769  /// added in response to an external search; in all other cases,
1770  /// addDecl() is the right function to use.
1771  /// See the ASTImporter for use cases.
1772  void addDeclInternal(Decl *D);
1773 
1774  /// Add the declaration D to this context without modifying
1775  /// any lookup tables.
1776  ///
1777  /// This is useful for some operations in dependent contexts where
1778  /// the semantic context might not be dependent; this basically
1779  /// only happens with friends.
1780  void addHiddenDecl(Decl *D);
1781 
1782  /// Removes a declaration from this context.
1783  void removeDecl(Decl *D);
1784 
1785  /// Checks whether a declaration is in this context.
1786  bool containsDecl(Decl *D) const;
1787 
1788  /// Checks whether a declaration is in this context.
1789  /// This also loads the Decls from the external source before the check.
1790  bool containsDeclAndLoad(Decl *D) const;
1791 
1794 
1795  /// lookup - Find the declarations (if any) with the given Name in
1796  /// this context. Returns a range of iterators that contains all of
1797  /// the declarations with this name, with object, function, member,
1798  /// and enumerator names preceding any tag name. Note that this
1799  /// routine will not look into parent contexts.
1800  lookup_result lookup(DeclarationName Name) const;
1801 
1802  /// Find the declarations with the given name that are visible
1803  /// within this context; don't attempt to retrieve anything from an
1804  /// external source.
1805  lookup_result noload_lookup(DeclarationName Name);
1806 
1807  /// A simplistic name lookup mechanism that performs name lookup
1808  /// into this declaration context without consulting the external source.
1809  ///
1810  /// This function should almost never be used, because it subverts the
1811  /// usual relationship between a DeclContext and the external source.
1812  /// See the ASTImporter for the (few, but important) use cases.
1813  ///
1814  /// FIXME: This is very inefficient; replace uses of it with uses of
1815  /// noload_lookup.
1816  void localUncachedLookup(DeclarationName Name,
1817  SmallVectorImpl<NamedDecl *> &Results);
1818 
1819  /// Makes a declaration visible within this context.
1820  ///
1821  /// This routine makes the declaration D visible to name lookup
1822  /// within this context and, if this is a transparent context,
1823  /// within its parent contexts up to the first enclosing
1824  /// non-transparent context. Making a declaration visible within a
1825  /// context does not transfer ownership of a declaration, and a
1826  /// declaration can be visible in many contexts that aren't its
1827  /// lexical context.
1828  ///
1829  /// If D is a redeclaration of an existing declaration that is
1830  /// visible from this context, as determined by
1831  /// NamedDecl::declarationReplaces, the previous declaration will be
1832  /// replaced with D.
1833  void makeDeclVisibleInContext(NamedDecl *D);
1834 
1835  /// all_lookups_iterator - An iterator that provides a view over the results
1836  /// of looking up every possible name.
1837  class all_lookups_iterator;
1838 
1839  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
1840 
1841  lookups_range lookups() const;
1842  // Like lookups(), but avoids loading external declarations.
1843  // If PreserveInternalState, avoids building lookup data structures too.
1844  lookups_range noload_lookups(bool PreserveInternalState) const;
1845 
1846  /// Iterators over all possible lookups within this context.
1847  all_lookups_iterator lookups_begin() const;
1848  all_lookups_iterator lookups_end() const;
1849 
1850  /// Iterators over all possible lookups within this context that are
1851  /// currently loaded; don't attempt to retrieve anything from an external
1852  /// source.
1853  all_lookups_iterator noload_lookups_begin() const;
1854  all_lookups_iterator noload_lookups_end() const;
1855 
1856  struct udir_iterator;
1857 
1858  using udir_iterator_base =
1859  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
1860  std::random_access_iterator_tag,
1862 
1863  struct udir_iterator : udir_iterator_base {
1864  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
1865 
1866  UsingDirectiveDecl *operator*() const;
1867  };
1868 
1869  using udir_range = llvm::iterator_range<udir_iterator>;
1870 
1871  udir_range using_directives() const;
1872 
1873  // These are all defined in DependentDiagnostic.h.
1874  class ddiag_iterator;
1875 
1876  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
1877 
1878  inline ddiag_range ddiags() const;
1879 
1880  // Low-level accessors
1881 
1882  /// Mark that there are external lexical declarations that we need
1883  /// to include in our lookup table (and that are not available as external
1884  /// visible lookups). These extra lookup results will be found by walking
1885  /// the lexical declarations of this context. This should be used only if
1886  /// setHasExternalLexicalStorage() has been called on any decl context for
1887  /// which this is the primary context.
1889  assert(this == getPrimaryContext() &&
1890  "should only be called on primary context");
1891  HasLazyExternalLexicalLookups = true;
1892  }
1893 
1894  /// Retrieve the internal representation of the lookup structure.
1895  /// This may omit some names if we are lazily building the structure.
1896  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
1897 
1898  /// Ensure the lookup structure is fully-built and return it.
1899  StoredDeclsMap *buildLookup();
1900 
1901  /// Whether this DeclContext has external storage containing
1902  /// additional declarations that are lexically in this context.
1903  bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; }
1904 
1905  /// State whether this DeclContext has external storage for
1906  /// declarations lexically in this context.
1907  void setHasExternalLexicalStorage(bool ES = true) {
1908  ExternalLexicalStorage = ES;
1909  }
1910 
1911  /// Whether this DeclContext has external storage containing
1912  /// additional declarations that are visible in this context.
1913  bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; }
1914 
1915  /// State whether this DeclContext has external storage for
1916  /// declarations visible in this context.
1917  void setHasExternalVisibleStorage(bool ES = true) {
1918  ExternalVisibleStorage = ES;
1919  if (ES && LookupPtr)
1920  NeedToReconcileExternalVisibleStorage = true;
1921  }
1922 
1923  /// Determine whether the given declaration is stored in the list of
1924  /// declarations lexically within this context.
1925  bool isDeclInLexicalTraversal(const Decl *D) const {
1926  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
1927  D == LastDecl);
1928  }
1929 
1930  bool setUseQualifiedLookup(bool use = true) {
1931  bool old_value = UseQualifiedLookup;
1932  UseQualifiedLookup = use;
1933  return old_value;
1934  }
1935 
1937  return UseQualifiedLookup;
1938  }
1939 
1940  static bool classof(const Decl *D);
1941  static bool classof(const DeclContext *D) { return true; }
1942 
1943  void dumpDeclContext() const;
1944  void dumpLookups() const;
1945  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
1946  bool Deserialize = false) const;
1947 
1948 private:
1949  friend class DependentDiagnostic;
1950 
1951  void reconcileExternalVisibleStorage() const;
1952  bool LoadLexicalDeclsFromExternalStorage() const;
1953 
1954  /// Makes a declaration visible within this context, but
1955  /// suppresses searches for external declarations with the same
1956  /// name.
1957  ///
1958  /// Analogous to makeDeclVisibleInContext, but for the exclusive
1959  /// use of addDeclInternal().
1960  void makeDeclVisibleInContextInternal(NamedDecl *D);
1961 
1962  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
1963 
1964  void loadLazyLocalLexicalLookups();
1965  void buildLookupImpl(DeclContext *DCtx, bool Internal);
1966  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1967  bool Rediscoverable);
1968  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
1969 };
1970 
1971 inline bool Decl::isTemplateParameter() const {
1972  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
1973  getKind() == TemplateTemplateParm;
1974 }
1975 
1976 // Specialization selected when ToTy is not a known subclass of DeclContext.
1977 template <class ToTy,
1978  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
1980  static const ToTy *doit(const DeclContext *Val) {
1981  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
1982  }
1983 
1984  static ToTy *doit(DeclContext *Val) {
1985  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
1986  }
1987 };
1988 
1989 // Specialization selected when ToTy is a known subclass of DeclContext.
1990 template <class ToTy>
1992  static const ToTy *doit(const DeclContext *Val) {
1993  return static_cast<const ToTy*>(Val);
1994  }
1995 
1996  static ToTy *doit(DeclContext *Val) {
1997  return static_cast<ToTy*>(Val);
1998  }
1999 };
2000 
2001 } // namespace clang
2002 
2003 namespace llvm {
2004 
2005 /// isa<T>(DeclContext*)
2006 template <typename To>
2007 struct isa_impl<To, ::clang::DeclContext> {
2008  static bool doit(const ::clang::DeclContext &Val) {
2009  return To::classofKind(Val.getDeclKind());
2010  }
2011 };
2012 
2013 /// cast<T>(DeclContext*)
2014 template<class ToTy>
2015 struct cast_convert_val<ToTy,
2016  const ::clang::DeclContext,const ::clang::DeclContext> {
2017  static const ToTy &doit(const ::clang::DeclContext &Val) {
2019  }
2020 };
2021 
2022 template<class ToTy>
2023 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2024  static ToTy &doit(::clang::DeclContext &Val) {
2026  }
2027 };
2028 
2029 template<class ToTy>
2030 struct cast_convert_val<ToTy,
2031  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2032  static const ToTy *doit(const ::clang::DeclContext *Val) {
2033  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2034  }
2035 };
2036 
2037 template<class ToTy>
2038 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2039  static ToTy *doit(::clang::DeclContext *Val) {
2040  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2041  }
2042 };
2043 
2044 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2045 template<class FromTy>
2046 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2047  static ::clang::DeclContext &doit(const FromTy &Val) {
2048  return *FromTy::castToDeclContext(&Val);
2049  }
2050 };
2051 
2052 template<class FromTy>
2053 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2054  static ::clang::DeclContext *doit(const FromTy *Val) {
2055  return FromTy::castToDeclContext(Val);
2056  }
2057 };
2058 
2059 template<class FromTy>
2060 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2061  static const ::clang::DeclContext &doit(const FromTy &Val) {
2062  return *FromTy::castToDeclContext(&Val);
2063  }
2064 };
2065 
2066 template<class FromTy>
2067 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2068  static const ::clang::DeclContext *doit(const FromTy *Val) {
2069  return FromTy::castToDeclContext(Val);
2070  }
2071 };
2072 
2073 } // namespace llvm
2074 
2075 #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:964
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:1936
specific_decl_iterator & operator++()
Definition: DeclBase.h:1651
void setImplicit(bool I=true)
Definition: DeclBase.h:555
Represents a function declaration or definition.
Definition: Decl.h:1716
redecl_iterator operator++(int)
Definition: DeclBase.h:929
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:878
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:1599
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:944
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:863
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:759
const char * getDeclKindName() const
Definition: DeclBase.cpp:123
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:1376
This declaration has an owning module, but is only visible to lookups that occur within that module...
bool isLookupContext() const
Test whether the context supports looking up names.
Definition: DeclBase.h:1404
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:986
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:476
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
Module * getOwningModuleForLinkage(bool IgnoreLinkage=false) const
Get the module that owns this declaration for linkage purposes.
Definition: Decl.cpp:1461
attr_iterator attr_begin() const
Definition: DeclBase.h:501
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:525
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3211
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:1663
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:410
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:1642
static void add(Kind k)
Definition: DeclBase.cpp:193
Not a friend object.
Definition: DeclBase.h:1101
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:960
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2008
bool isObjCContainer() const
Definition: DeclBase.h:1380
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:415
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
static void printGroup(Decl **Begin, unsigned NumDecls, raw_ostream &Out, const PrintingPolicy &Policy, unsigned Indentation=0)
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:1925
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1984
SourceLocation getLocEnd() const LLVM_READONLY
Definition: DeclBase.h:414
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:1913
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:1684
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:799
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:254
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:320
redecl_iterator & operator++()
Definition: DeclBase.h:920
reference back() const
Definition: DeclBase.h:1239
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:754
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:380
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1588
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:119
reference front() const
Definition: DeclBase.h:1238
bool isInvalidDecl() const
Definition: DeclBase.h:549
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:1668
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:450
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:211
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:738
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:1917
value_type operator->() const
Definition: DeclBase.h:1562
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:130
bool isLexicallyWithinFunctionOrMethod() const
Returns true if this declaration lexically is inside a function.
Definition: DeclBase.cpp:335
Represents a struct/union/class.
Definition: Decl.h:3570
void dumpColor() const
Definition: ASTDumper.cpp:2749
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:85
One of these records is kept for each identifier that is lexed.
void print(raw_ostream &Out, unsigned Indentation=0, bool PrintInstantiation=false) const
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:347
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:1190
attr_iterator attr_end() const
Definition: DeclBase.h:504
specific_decl_iterator operator++(int)
Definition: DeclBase.h:1657
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1584
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:911
This declaration is a friend function.
Definition: DeclBase.h:152
bool isNamespace() const
Definition: DeclBase.h:1421
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:780
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:630
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:855
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:803
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1463
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:530
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:671
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1744
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1220
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:422
Namespaces, declared with &#39;namespace foo {}&#39;.
Definition: DeclBase.h:140
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:809
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:833
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:786
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1553
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:1720
static bool isStdNamespace(const DeclContext *DC)
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1103
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1630
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1243
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:1888
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1161
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:828
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1629
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:117
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:746
Represents a linkage specification.
Definition: DeclCXX.h:2823
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2054
bool isExported() const
Whether this declaration is exported (by virtue of being lexically within an ExportDecl or by being a...
Definition: DeclBase.cpp:434
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:898
Ordinary names.
Definition: DeclBase.h:144
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:395
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:877
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:425
bool canBeWeakImported(bool &IsDefinition) const
Determines whether this symbol can be weak-imported, e.g., whether it would be well-formed to add the...
Definition: DeclBase.cpp:655
bool hasAttr() const
Definition: DeclBase.h:538
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:102
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:589
This declaration is a C++ operator declared in a non-class context.
Definition: DeclBase.h:168
Objective C @protocol.
Definition: DeclBase.h:147
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:1869
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:1596
std::ptrdiff_t difference_type
Definition: DeclBase.h:912
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1368
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:933
This declaration is a friend class.
Definition: DeclBase.h:157
const Decl * getNonClosureContext() const
Definition: DeclBase.h:443
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1359
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:883
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:475
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:1839
static bool classofKind(Kind K)
Definition: DeclBase.h:1126
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:704
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:1896
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
This declaration is an OpenMP user defined reduction construction.
Definition: DeclBase.h:178
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:554
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:729
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:975
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1203
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:426
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1060
bool isFileContext() const
Definition: DeclBase.h:1409
DeclContext * getDeclContext()
Definition: DeclBase.h:428
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:956
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:1971
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:621
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:495
const DeclContext * getParent() const
Definition: DeclBase.h:1346
bool isFunctionOrMethod() const
Definition: DeclBase.h:1392
reference operator[](size_t N) const
Definition: DeclBase.h:1240
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:384
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1343
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:420
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1032
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:1475
const DeclContext * getDeclContext() const
Definition: DeclBase.h:433
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
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:917
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1110
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:813
AttrVec & getAttrs()
Definition: DeclBase.h:480
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:992
bool hasAttrs() const
Definition: DeclBase.h:474
filtered_decl_iterator & operator++()
Definition: DeclBase.h:1727
void addAttr(Attr *A)
Definition: DeclBase.h:487
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2068
iterator::reference reference
Definition: DeclBase.h:1230
Abstract interface for external sources of AST nodes.
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:409
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:226
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1336
This declaration has an owning module, but is globally visible (typically because its owning module i...
#define false
Definition: stdbool.h:33
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:902
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:641
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:593
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:136
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:791
The nullability qualifier is set when the nullability of the result or parameter was expressed via a ...
Definition: DeclBase.h:207
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
void setReferenced(bool R=true)
Definition: DeclBase.h:584
static bool classof(const DeclContext *D)
Definition: DeclBase.h:1941
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1708
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:1864
bool hasCachedLinkage() const
Definition: DeclBase.h:399
A friend of a previously-declared entity.
Definition: DeclBase.h:1102
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1205
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:1903
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2047
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:702
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:935
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:1876
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:397
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:890
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:1996
decl_iterator noload_decls_end() const
Definition: DeclBase.h:1600
void dropAttrs()
Definition: DeclBase.cpp:832
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c.h:68
virtual bool isOutOfLine() const
Determine whether this declaration is declared out of line (outside its semantic context).
Definition: Decl.cpp:99
bool isWeakImported() const
Determine whether this is a weak-imported symbol.
Definition: DeclBase.cpp:685
Defines various enumerations that describe declaration and type specifiers.
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1545
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:582
redecl_iterator redecls_begin() const
Definition: DeclBase.h:952
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:948
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:1980
Dataflow Directional Tag Classes.
void updateOutOfDate(IdentifierInfo &II) const
Update a potentially out-of-date declaration.
Definition: DeclBase.cpp:63
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1264
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:589
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:979
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1018
bool isRecord() const
Definition: DeclBase.h:1417
attr_range attrs() const
Definition: DeclBase.h:497
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:939
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:354
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:494
AccessSpecifier getAccess() const
Definition: DeclBase.h:463
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:422
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:971
decl_iterator operator++(int)
Definition: DeclBase.h:1569
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1475
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:125
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:774
void setHasExternalLexicalStorage(bool ES=true)
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:1907
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:1608
This declaration is not owned by a module.
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:1071
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:1042
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1506
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:569
static bool classof(const OMPClause *T)
static bool isFunctionOrMethod(const Decl *D)
isFunctionOrMethod - Return true if the given decl has function type (function or function-typed vari...
void setNonMemberOperator()
Specifies that this declaration is a C++ overloaded non-member.
Definition: DeclBase.h:1119
T * getAttr() const
Definition: DeclBase.h:534
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:714
virtual ~Decl()
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:1733
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1362
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:706
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1229
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:412
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:520
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2061
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:969
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:1739
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:1564
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1180
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1500
value_type operator->() const
Definition: DeclBase.h:918
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1486
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:894
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:1992
friend class CXXClassMemberWrapper
Definition: DeclBase.h:314
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1372
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:89
void dump() const
Definition: ASTDumper.cpp:2738
The top declaration context.
Definition: Decl.h:107
static void PrintStats()
Definition: DeclBase.cpp:169
This declaration is a function-local extern declaration of a variable or function.
Definition: DeclBase.h:175
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1120
static void EnableStatistics()
Definition: DeclBase.cpp:165
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1575
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:470
#define true
Definition: stdbool.h:32
bool setUseQualifiedLookup(bool use=true)
Definition: DeclBase.h:1930
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:603
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1413
void dropAttr()
Definition: DeclBase.h:509
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:458
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:448
TemplateDecl * getDescribedTemplate() const
If this is a declaration that describes some template, this method returns that template declaration...
Definition: DeclBase.cpp:230
Represents C++ using-directive.
Definition: DeclCXX.h:2924
bool hasDefiningAttr() const
Return true if this declaration has an attribute which acts as definition of the entity, such as &#39;alias&#39; or &#39;ifunc&#39;.
Definition: DeclBase.cpp:471
bool isInStdNamespace() const
Definition: DeclBase.cpp:357
SourceLocation getBegin() const
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:361
bool isTemplated() const
Determine whether this declaration is a templated entity (whether it is.
Definition: DeclBase.cpp:243
This class handles loading and caching of source files into memory.
SourceLocation getBodyRBrace() const
getBodyRBrace - Gets the right brace of the body, if a body exists.
Definition: DeclBase.cpp:882
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:419
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1579
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1494
DeclContext(Decl::Kind K)
Definition: DeclBase.h:1326
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:680
decl_iterator decls_end() const
Definition: DeclBase.h:1590
This declaration is a using declaration.
Definition: DeclBase.h:163
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:1707
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:871
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1173