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DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the Decl and DeclContext interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_AST_DECLBASE_H
15 #define LLVM_CLANG_AST_DECLBASE_H
16 
17 #include "clang/AST/AttrIterator.h"
20 #include "clang/Basic/LLVM.h"
22 #include "clang/Basic/Specifiers.h"
23 #include "llvm/ADT/ArrayRef.h"
24 #include "llvm/ADT/PointerIntPair.h"
25 #include "llvm/ADT/PointerUnion.h"
26 #include "llvm/ADT/iterator.h"
27 #include "llvm/ADT/iterator_range.h"
28 #include "llvm/Support/Casting.h"
29 #include "llvm/Support/Compiler.h"
30 #include "llvm/Support/PrettyStackTrace.h"
31 #include "llvm/Support/VersionTuple.h"
32 #include <algorithm>
33 #include <cassert>
34 #include <cstddef>
35 #include <iterator>
36 #include <string>
37 #include <type_traits>
38 #include <utility>
39 
40 namespace clang {
41 
42 class ASTContext;
43 class ASTMutationListener;
44 class Attr;
45 class DeclContext;
46 class ExternalSourceSymbolAttr;
47 class FunctionDecl;
48 class FunctionType;
49 class IdentifierInfo;
50 enum Linkage : unsigned char;
51 class LinkageSpecDecl;
52 class Module;
53 class NamedDecl;
54 class ObjCCategoryDecl;
55 class ObjCCategoryImplDecl;
56 class ObjCContainerDecl;
57 class ObjCImplDecl;
58 class ObjCImplementationDecl;
59 class ObjCInterfaceDecl;
60 class ObjCMethodDecl;
61 class ObjCProtocolDecl;
62 struct PrintingPolicy;
63 class RecordDecl;
64 class SourceManager;
65 class Stmt;
66 class StoredDeclsMap;
67 class TemplateDecl;
68 class TranslationUnitDecl;
69 class UsingDirectiveDecl;
70 
71 /// Captures the result of checking the availability of a
72 /// declaration.
78 };
79 
80 /// Decl - This represents one declaration (or definition), e.g. a variable,
81 /// typedef, function, struct, etc.
82 ///
83 /// Note: There are objects tacked on before the *beginning* of Decl
84 /// (and its subclasses) in its Decl::operator new(). Proper alignment
85 /// of all subclasses (not requiring more than the alignment of Decl) is
86 /// asserted in DeclBase.cpp.
87 class alignas(8) Decl {
88 public:
89  /// Lists the kind of concrete classes of Decl.
90  enum Kind {
91 #define DECL(DERIVED, BASE) DERIVED,
92 #define ABSTRACT_DECL(DECL)
93 #define DECL_RANGE(BASE, START, END) \
94  first##BASE = START, last##BASE = END,
95 #define LAST_DECL_RANGE(BASE, START, END) \
96  first##BASE = START, last##BASE = END
97 #include "clang/AST/DeclNodes.inc"
98  };
99 
100  /// A placeholder type used to construct an empty shell of a
101  /// decl-derived type that will be filled in later (e.g., by some
102  /// deserialization method).
103  struct EmptyShell {};
104 
105  /// IdentifierNamespace - The different namespaces in which
106  /// declarations may appear. According to C99 6.2.3, there are
107  /// four namespaces, labels, tags, members and ordinary
108  /// identifiers. C++ describes lookup completely differently:
109  /// certain lookups merely "ignore" certain kinds of declarations,
110  /// usually based on whether the declaration is of a type, etc.
111  ///
112  /// These are meant as bitmasks, so that searches in
113  /// C++ can look into the "tag" namespace during ordinary lookup.
114  ///
115  /// Decl currently provides 15 bits of IDNS bits.
117  /// Labels, declared with 'x:' and referenced with 'goto x'.
118  IDNS_Label = 0x0001,
119 
120  /// Tags, declared with 'struct foo;' and referenced with
121  /// 'struct foo'. All tags are also types. This is what
122  /// elaborated-type-specifiers look for in C.
123  /// This also contains names that conflict with tags in the
124  /// same scope but that are otherwise ordinary names (non-type
125  /// template parameters and indirect field declarations).
126  IDNS_Tag = 0x0002,
127 
128  /// Types, declared with 'struct foo', typedefs, etc.
129  /// This is what elaborated-type-specifiers look for in C++,
130  /// but note that it's ill-formed to find a non-tag.
131  IDNS_Type = 0x0004,
132 
133  /// Members, declared with object declarations within tag
134  /// definitions. In C, these can only be found by "qualified"
135  /// lookup in member expressions. In C++, they're found by
136  /// normal lookup.
137  IDNS_Member = 0x0008,
138 
139  /// Namespaces, declared with 'namespace foo {}'.
140  /// Lookup for nested-name-specifiers find these.
141  IDNS_Namespace = 0x0010,
142 
143  /// Ordinary names. In C, everything that's not a label, tag,
144  /// member, or function-local extern ends up here.
145  IDNS_Ordinary = 0x0020,
146 
147  /// Objective C \@protocol.
149 
150  /// This declaration is a friend function. A friend function
151  /// declaration is always in this namespace but may also be in
152  /// IDNS_Ordinary if it was previously declared.
154 
155  /// This declaration is a friend class. A friend class
156  /// declaration is always in this namespace but may also be in
157  /// IDNS_Tag|IDNS_Type if it was previously declared.
158  IDNS_TagFriend = 0x0100,
159 
160  /// This declaration is a using declaration. A using declaration
161  /// *introduces* a number of other declarations into the current
162  /// scope, and those declarations use the IDNS of their targets,
163  /// but the actual using declarations go in this namespace.
164  IDNS_Using = 0x0200,
165 
166  /// This declaration is a C++ operator declared in a non-class
167  /// context. All such operators are also in IDNS_Ordinary.
168  /// C++ lexical operator lookup looks for these.
170 
171  /// This declaration is a function-local extern declaration of a
172  /// variable or function. This may also be IDNS_Ordinary if it
173  /// has been declared outside any function. These act mostly like
174  /// invisible friend declarations, but are also visible to unqualified
175  /// lookup within the scope of the declaring function.
177 
178  /// This declaration is an OpenMP user defined reduction construction.
180  };
181 
182  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
183  /// parameter types in method declarations. Other than remembering
184  /// them and mangling them into the method's signature string, these
185  /// are ignored by the compiler; they are consumed by certain
186  /// remote-messaging frameworks.
187  ///
188  /// in, inout, and out are mutually exclusive and apply only to
189  /// method parameters. bycopy and byref are mutually exclusive and
190  /// apply only to method parameters (?). oneway applies only to
191  /// results. All of these expect their corresponding parameter to
192  /// have a particular type. None of this is currently enforced by
193  /// clang.
194  ///
195  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
198  OBJC_TQ_In = 0x1,
200  OBJC_TQ_Out = 0x4,
204 
205  /// The nullability qualifier is set when the nullability of the
206  /// result or parameter was expressed via a context-sensitive
207  /// keyword.
209  };
210 
211  /// The kind of ownership a declaration has, for visibility purposes.
212  /// This enumeration is designed such that higher values represent higher
213  /// levels of name hiding.
214  enum class ModuleOwnershipKind : unsigned {
215  /// This declaration is not owned by a module.
216  Unowned,
217 
218  /// This declaration has an owning module, but is globally visible
219  /// (typically because its owning module is visible and we know that
220  /// modules cannot later become hidden in this compilation).
221  /// After serialization and deserialization, this will be converted
222  /// to VisibleWhenImported.
223  Visible,
224 
225  /// This declaration has an owning module, and is visible when that
226  /// module is imported.
227  VisibleWhenImported,
228 
229  /// This declaration has an owning module, but is only visible to
230  /// lookups that occur within that module.
231  ModulePrivate
232  };
233 
234 protected:
235  /// The next declaration within the same lexical
236  /// DeclContext. These pointers form the linked list that is
237  /// traversed via DeclContext's decls_begin()/decls_end().
238  ///
239  /// The extra two bits are used for the ModuleOwnershipKind.
240  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
241 
242 private:
243  friend class DeclContext;
244 
245  struct MultipleDC {
246  DeclContext *SemanticDC;
247  DeclContext *LexicalDC;
248  };
249 
250  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
251  /// For declarations that don't contain C++ scope specifiers, it contains
252  /// the DeclContext where the Decl was declared.
253  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
254  /// with the context where it semantically belongs (SemanticDC) and the
255  /// context where it was lexically declared (LexicalDC).
256  /// e.g.:
257  ///
258  /// namespace A {
259  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
260  /// }
261  /// void A::f(); // SemanticDC == namespace 'A'
262  /// // LexicalDC == global namespace
263  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
264 
265  bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
266  bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
267 
268  MultipleDC *getMultipleDC() const {
269  return DeclCtx.get<MultipleDC*>();
270  }
271 
272  DeclContext *getSemanticDC() const {
273  return DeclCtx.get<DeclContext*>();
274  }
275 
276  /// Loc - The location of this decl.
277  SourceLocation Loc;
278 
279  /// DeclKind - This indicates which class this is.
280  unsigned DeclKind : 7;
281 
282  /// InvalidDecl - This indicates a semantic error occurred.
283  unsigned InvalidDecl : 1;
284 
285  /// HasAttrs - This indicates whether the decl has attributes or not.
286  unsigned HasAttrs : 1;
287 
288  /// Implicit - Whether this declaration was implicitly generated by
289  /// the implementation rather than explicitly written by the user.
290  unsigned Implicit : 1;
291 
292  /// Whether this declaration was "used", meaning that a definition is
293  /// required.
294  unsigned Used : 1;
295 
296  /// Whether this declaration was "referenced".
297  /// The difference with 'Used' is whether the reference appears in a
298  /// evaluated context or not, e.g. functions used in uninstantiated templates
299  /// are regarded as "referenced" but not "used".
300  unsigned Referenced : 1;
301 
302  /// Whether this declaration is a top-level declaration (function,
303  /// global variable, etc.) that is lexically inside an objc container
304  /// definition.
305  unsigned TopLevelDeclInObjCContainer : 1;
306 
307  /// Whether statistic collection is enabled.
308  static bool StatisticsEnabled;
309 
310 protected:
311  friend class ASTDeclReader;
312  friend class ASTDeclWriter;
313  friend class ASTNodeImporter;
314  friend class ASTReader;
315  friend class CXXClassMemberWrapper;
316  friend class LinkageComputer;
317  template<typename decl_type> friend class Redeclarable;
318 
319  /// Access - Used by C++ decls for the access specifier.
320  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
321  unsigned Access : 2;
322 
323  /// Whether this declaration was loaded from an AST file.
324  unsigned FromASTFile : 1;
325 
326  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
327  unsigned IdentifierNamespace : 13;
328 
329  /// If 0, we have not computed the linkage of this declaration.
330  /// Otherwise, it is the linkage + 1.
331  mutable unsigned CacheValidAndLinkage : 3;
332 
333  /// Allocate memory for a deserialized declaration.
334  ///
335  /// This routine must be used to allocate memory for any declaration that is
336  /// deserialized from a module file.
337  ///
338  /// \param Size The size of the allocated object.
339  /// \param Ctx The context in which we will allocate memory.
340  /// \param ID The global ID of the deserialized declaration.
341  /// \param Extra The amount of extra space to allocate after the object.
342  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
343  std::size_t Extra = 0);
344 
345  /// Allocate memory for a non-deserialized declaration.
346  void *operator new(std::size_t Size, const ASTContext &Ctx,
347  DeclContext *Parent, std::size_t Extra = 0);
348 
349 private:
350  bool AccessDeclContextSanity() const;
351 
352  /// Get the module ownership kind to use for a local lexical child of \p DC,
353  /// which may be either a local or (rarely) an imported declaration.
354  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
355  if (DC) {
356  auto *D = cast<Decl>(DC);
357  auto MOK = D->getModuleOwnershipKind();
358  if (MOK != ModuleOwnershipKind::Unowned &&
359  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
360  return MOK;
361  // If D is not local and we have no local module storage, then we don't
362  // need to track module ownership at all.
363  }
365  }
366 
367 protected:
369  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
370  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false),
371  Implicit(false), Used(false), Referenced(false),
372  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
375  if (StatisticsEnabled) add(DK);
376  }
377 
378  Decl(Kind DK, EmptyShell Empty)
379  : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
380  Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
384  if (StatisticsEnabled) add(DK);
385  }
386 
387  virtual ~Decl();
388 
389  /// Update a potentially out-of-date declaration.
390  void updateOutOfDate(IdentifierInfo &II) const;
391 
393  return Linkage(CacheValidAndLinkage - 1);
394  }
395 
396  void setCachedLinkage(Linkage L) const {
397  CacheValidAndLinkage = L + 1;
398  }
399 
400  bool hasCachedLinkage() const {
401  return CacheValidAndLinkage;
402  }
403 
404 public:
405  /// Source range that this declaration covers.
406  virtual SourceRange getSourceRange() const LLVM_READONLY {
407  return SourceRange(getLocation(), getLocation());
408  }
409 
410  SourceLocation getBeginLoc() const LLVM_READONLY {
411  return getSourceRange().getBegin();
412  }
413 
414  SourceLocation getEndLoc() const LLVM_READONLY {
415  return getSourceRange().getEnd();
416  }
417 
418  SourceLocation getLocation() const { return Loc; }
419  void setLocation(SourceLocation L) { Loc = L; }
420 
421  Kind getKind() const { return static_cast<Kind>(DeclKind); }
422  const char *getDeclKindName() const;
423 
424  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
425  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
426 
428  if (isInSemaDC())
429  return getSemanticDC();
430  return getMultipleDC()->SemanticDC;
431  }
432  const DeclContext *getDeclContext() const {
433  return const_cast<Decl*>(this)->getDeclContext();
434  }
435 
436  /// Find the innermost non-closure ancestor of this declaration,
437  /// walking up through blocks, lambdas, etc. If that ancestor is
438  /// not a code context (!isFunctionOrMethod()), returns null.
439  ///
440  /// A declaration may be its own non-closure context.
442  const Decl *getNonClosureContext() const {
443  return const_cast<Decl*>(this)->getNonClosureContext();
444  }
445 
448  return const_cast<Decl*>(this)->getTranslationUnitDecl();
449  }
450 
451  bool isInAnonymousNamespace() const;
452 
453  bool isInStdNamespace() const;
454 
455  ASTContext &getASTContext() const LLVM_READONLY;
456 
458  Access = AS;
459  assert(AccessDeclContextSanity());
460  }
461 
463  assert(AccessDeclContextSanity());
464  return AccessSpecifier(Access);
465  }
466 
467  /// Retrieve the access specifier for this declaration, even though
468  /// it may not yet have been properly set.
470  return AccessSpecifier(Access);
471  }
472 
473  bool hasAttrs() const { return HasAttrs; }
474 
475  void setAttrs(const AttrVec& Attrs) {
476  return setAttrsImpl(Attrs, getASTContext());
477  }
478 
480  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
481  }
482 
483  const AttrVec &getAttrs() const;
484  void dropAttrs();
485  void addAttr(Attr *A);
486 
487  using attr_iterator = AttrVec::const_iterator;
488  using attr_range = llvm::iterator_range<attr_iterator>;
489 
490  attr_range attrs() const {
491  return attr_range(attr_begin(), attr_end());
492  }
493 
495  return hasAttrs() ? getAttrs().begin() : nullptr;
496  }
498  return hasAttrs() ? getAttrs().end() : nullptr;
499  }
500 
501  template <typename T>
502  void dropAttr() {
503  if (!HasAttrs) return;
504 
505  AttrVec &Vec = getAttrs();
506  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
507 
508  if (Vec.empty())
509  HasAttrs = false;
510  }
511 
512  template <typename T>
513  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
514  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
515  }
516 
517  template <typename T>
520  }
521 
522  template <typename T>
525  }
526 
527  template<typename T> T *getAttr() const {
528  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
529  }
530 
531  template<typename T> bool hasAttr() const {
532  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
533  }
534 
535  /// getMaxAlignment - return the maximum alignment specified by attributes
536  /// on this decl, 0 if there are none.
537  unsigned getMaxAlignment() const;
538 
539  /// setInvalidDecl - Indicates the Decl had a semantic error. This
540  /// allows for graceful error recovery.
541  void setInvalidDecl(bool Invalid = true);
542  bool isInvalidDecl() const { return (bool) InvalidDecl; }
543 
544  /// isImplicit - Indicates whether the declaration was implicitly
545  /// generated by the implementation. If false, this declaration
546  /// was written explicitly in the source code.
547  bool isImplicit() const { return Implicit; }
548  void setImplicit(bool I = true) { Implicit = I; }
549 
550  /// Whether *any* (re-)declaration of the entity was used, meaning that
551  /// a definition is required.
552  ///
553  /// \param CheckUsedAttr When true, also consider the "used" attribute
554  /// (in addition to the "used" bit set by \c setUsed()) when determining
555  /// whether the function is used.
556  bool isUsed(bool CheckUsedAttr = true) const;
557 
558  /// Set whether the declaration is used, in the sense of odr-use.
559  ///
560  /// This should only be used immediately after creating a declaration.
561  /// It intentionally doesn't notify any listeners.
562  void setIsUsed() { getCanonicalDecl()->Used = true; }
563 
564  /// Mark the declaration used, in the sense of odr-use.
565  ///
566  /// This notifies any mutation listeners in addition to setting a bit
567  /// indicating the declaration is used.
568  void markUsed(ASTContext &C);
569 
570  /// Whether any declaration of this entity was referenced.
571  bool isReferenced() const;
572 
573  /// Whether this declaration was referenced. This should not be relied
574  /// upon for anything other than debugging.
575  bool isThisDeclarationReferenced() const { return Referenced; }
576 
577  void setReferenced(bool R = true) { Referenced = R; }
578 
579  /// Whether this declaration is a top-level declaration (function,
580  /// global variable, etc.) that is lexically inside an objc container
581  /// definition.
583  return TopLevelDeclInObjCContainer;
584  }
585 
586  void setTopLevelDeclInObjCContainer(bool V = true) {
587  TopLevelDeclInObjCContainer = V;
588  }
589 
590  /// Looks on this and related declarations for an applicable
591  /// external source symbol attribute.
592  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
593 
594  /// Whether this declaration was marked as being private to the
595  /// module in which it was defined.
596  bool isModulePrivate() const {
598  }
599 
600  /// Whether this declaration is exported (by virtue of being lexically
601  /// within an ExportDecl or by being a NamespaceDecl).
602  bool isExported() const;
603 
604  /// Return true if this declaration has an attribute which acts as
605  /// definition of the entity, such as 'alias' or 'ifunc'.
606  bool hasDefiningAttr() const;
607 
608  /// Return this declaration's defining attribute if it has one.
609  const Attr *getDefiningAttr() const;
610 
611 protected:
612  /// Specify that this declaration was marked as being private
613  /// to the module in which it was defined.
615  // The module-private specifier has no effect on unowned declarations.
616  // FIXME: We should track this in some way for source fidelity.
618  return;
620  }
621 
622  /// Set the owning module ID.
623  void setOwningModuleID(unsigned ID) {
624  assert(isFromASTFile() && "Only works on a deserialized declaration");
625  *((unsigned*)this - 2) = ID;
626  }
627 
628 public:
629  /// Determine the availability of the given declaration.
630  ///
631  /// This routine will determine the most restrictive availability of
632  /// the given declaration (e.g., preferring 'unavailable' to
633  /// 'deprecated').
634  ///
635  /// \param Message If non-NULL and the result is not \c
636  /// AR_Available, will be set to a (possibly empty) message
637  /// describing why the declaration has not been introduced, is
638  /// deprecated, or is unavailable.
639  ///
640  /// \param EnclosingVersion The version to compare with. If empty, assume the
641  /// deployment target version.
642  ///
643  /// \param RealizedPlatform If non-NULL and the availability result is found
644  /// in an available attribute it will set to the platform which is written in
645  /// the available attribute.
647  getAvailability(std::string *Message = nullptr,
648  VersionTuple EnclosingVersion = VersionTuple(),
649  StringRef *RealizedPlatform = nullptr) const;
650 
651  /// Retrieve the version of the target platform in which this
652  /// declaration was introduced.
653  ///
654  /// \returns An empty version tuple if this declaration has no 'introduced'
655  /// availability attributes, or the version tuple that's specified in the
656  /// attribute otherwise.
657  VersionTuple getVersionIntroduced() const;
658 
659  /// Determine whether this declaration is marked 'deprecated'.
660  ///
661  /// \param Message If non-NULL and the declaration is deprecated,
662  /// this will be set to the message describing why the declaration
663  /// was deprecated (which may be empty).
664  bool isDeprecated(std::string *Message = nullptr) const {
665  return getAvailability(Message) == AR_Deprecated;
666  }
667 
668  /// Determine whether this declaration is marked 'unavailable'.
669  ///
670  /// \param Message If non-NULL and the declaration is unavailable,
671  /// this will be set to the message describing why the declaration
672  /// was made unavailable (which may be empty).
673  bool isUnavailable(std::string *Message = nullptr) const {
674  return getAvailability(Message) == AR_Unavailable;
675  }
676 
677  /// Determine whether this is a weak-imported symbol.
678  ///
679  /// Weak-imported symbols are typically marked with the
680  /// 'weak_import' attribute, but may also be marked with an
681  /// 'availability' attribute where we're targing a platform prior to
682  /// the introduction of this feature.
683  bool isWeakImported() const;
684 
685  /// Determines whether this symbol can be weak-imported,
686  /// e.g., whether it would be well-formed to add the weak_import
687  /// attribute.
688  ///
689  /// \param IsDefinition Set to \c true to indicate that this
690  /// declaration cannot be weak-imported because it has a definition.
691  bool canBeWeakImported(bool &IsDefinition) const;
692 
693  /// Determine whether this declaration came from an AST file (such as
694  /// a precompiled header or module) rather than having been parsed.
695  bool isFromASTFile() const { return FromASTFile; }
696 
697  /// Retrieve the global declaration ID associated with this
698  /// declaration, which specifies where this Decl was loaded from.
699  unsigned getGlobalID() const {
700  if (isFromASTFile())
701  return *((const unsigned*)this - 1);
702  return 0;
703  }
704 
705  /// Retrieve the global ID of the module that owns this particular
706  /// declaration.
707  unsigned getOwningModuleID() const {
708  if (isFromASTFile())
709  return *((const unsigned*)this - 2);
710  return 0;
711  }
712 
713 private:
714  Module *getOwningModuleSlow() const;
715 
716 protected:
717  bool hasLocalOwningModuleStorage() const;
718 
719 public:
720  /// Get the imported owning module, if this decl is from an imported
721  /// (non-local) module.
723  if (!isFromASTFile() || !hasOwningModule())
724  return nullptr;
725 
726  return getOwningModuleSlow();
727  }
728 
729  /// Get the local owning module, if known. Returns nullptr if owner is
730  /// not yet known or declaration is not from a module.
732  if (isFromASTFile() || !hasOwningModule())
733  return nullptr;
734 
735  assert(hasLocalOwningModuleStorage() &&
736  "owned local decl but no local module storage");
737  return reinterpret_cast<Module *const *>(this)[-1];
738  }
740  assert(!isFromASTFile() && hasOwningModule() &&
742  "should not have a cached owning module");
743  reinterpret_cast<Module **>(this)[-1] = M;
744  }
745 
746  /// Is this declaration owned by some module?
747  bool hasOwningModule() const {
749  }
750 
751  /// Get the module that owns this declaration (for visibility purposes).
754  }
755 
756  /// Get the module that owns this declaration for linkage purposes.
757  /// There only ever is such a module under the C++ Modules TS.
758  ///
759  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
760  /// all declarations in a global module fragment are unowned.
761  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
762 
763  /// Determine whether this declaration might be hidden from name
764  /// lookup. Note that the declaration might be visible even if this returns
765  /// \c false, if the owning module is visible within the query context.
766  // FIXME: Rename this to make it clearer what it does.
767  bool isHidden() const {
769  }
770 
771  /// Set that this declaration is globally visible, even if it came from a
772  /// module that is not visible.
774  if (isHidden())
776  }
777 
778  /// Get the kind of module ownership for this declaration.
780  return NextInContextAndBits.getInt();
781  }
782 
783  /// Set whether this declaration is hidden from name lookup.
788  "no storage available for owning module for this declaration");
789  NextInContextAndBits.setInt(MOK);
790  }
791 
792  unsigned getIdentifierNamespace() const {
793  return IdentifierNamespace;
794  }
795 
796  bool isInIdentifierNamespace(unsigned NS) const {
797  return getIdentifierNamespace() & NS;
798  }
799 
800  static unsigned getIdentifierNamespaceForKind(Kind DK);
801 
804  }
805 
806  static bool isTagIdentifierNamespace(unsigned NS) {
807  // TagDecls have Tag and Type set and may also have TagFriend.
808  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
809  }
810 
811  /// getLexicalDeclContext - The declaration context where this Decl was
812  /// lexically declared (LexicalDC). May be different from
813  /// getDeclContext() (SemanticDC).
814  /// e.g.:
815  ///
816  /// namespace A {
817  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
818  /// }
819  /// void A::f(); // SemanticDC == namespace 'A'
820  /// // LexicalDC == global namespace
822  if (isInSemaDC())
823  return getSemanticDC();
824  return getMultipleDC()->LexicalDC;
825  }
827  return const_cast<Decl*>(this)->getLexicalDeclContext();
828  }
829 
830  /// Determine whether this declaration is declared out of line (outside its
831  /// semantic context).
832  virtual bool isOutOfLine() const;
833 
834  /// setDeclContext - Set both the semantic and lexical DeclContext
835  /// to DC.
836  void setDeclContext(DeclContext *DC);
837 
839 
840  /// Determine whether this declaration is a templated entity (whether it is
841  // within the scope of a template parameter).
842  bool isTemplated() const;
843 
844  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
845  /// scoped decl is defined outside the current function or method. This is
846  /// roughly global variables and functions, but also handles enums (which
847  /// could be defined inside or outside a function etc).
849  return getParentFunctionOrMethod() == nullptr;
850  }
851 
852  /// Returns true if this declaration lexically is inside a function.
853  /// It recognizes non-defining declarations as well as members of local
854  /// classes:
855  /// \code
856  /// void foo() { void bar(); }
857  /// void foo2() { class ABC { void bar(); }; }
858  /// \endcode
860 
861  /// If this decl is defined inside a function/method/block it returns
862  /// the corresponding DeclContext, otherwise it returns null.
863  const DeclContext *getParentFunctionOrMethod() const;
865  return const_cast<DeclContext*>(
866  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
867  }
868 
869  /// Retrieves the "canonical" declaration of the given declaration.
870  virtual Decl *getCanonicalDecl() { return this; }
871  const Decl *getCanonicalDecl() const {
872  return const_cast<Decl*>(this)->getCanonicalDecl();
873  }
874 
875  /// Whether this particular Decl is a canonical one.
876  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
877 
878 protected:
879  /// Returns the next redeclaration or itself if this is the only decl.
880  ///
881  /// Decl subclasses that can be redeclared should override this method so that
882  /// Decl::redecl_iterator can iterate over them.
883  virtual Decl *getNextRedeclarationImpl() { return this; }
884 
885  /// Implementation of getPreviousDecl(), to be overridden by any
886  /// subclass that has a redeclaration chain.
887  virtual Decl *getPreviousDeclImpl() { return nullptr; }
888 
889  /// Implementation of getMostRecentDecl(), to be overridden by any
890  /// subclass that has a redeclaration chain.
891  virtual Decl *getMostRecentDeclImpl() { return this; }
892 
893 public:
894  /// Iterates through all the redeclarations of the same decl.
896  /// Current - The current declaration.
897  Decl *Current = nullptr;
898  Decl *Starter;
899 
900  public:
901  using value_type = Decl *;
902  using reference = const value_type &;
903  using pointer = const value_type *;
904  using iterator_category = std::forward_iterator_tag;
906 
907  redecl_iterator() = default;
908  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
909 
910  reference operator*() const { return Current; }
911  value_type operator->() const { return Current; }
912 
914  assert(Current && "Advancing while iterator has reached end");
915  // Get either previous decl or latest decl.
916  Decl *Next = Current->getNextRedeclarationImpl();
917  assert(Next && "Should return next redeclaration or itself, never null!");
918  Current = (Next != Starter) ? Next : nullptr;
919  return *this;
920  }
921 
923  redecl_iterator tmp(*this);
924  ++(*this);
925  return tmp;
926  }
927 
929  return x.Current == y.Current;
930  }
931 
933  return x.Current != y.Current;
934  }
935  };
936 
937  using redecl_range = llvm::iterator_range<redecl_iterator>;
938 
939  /// Returns an iterator range for all the redeclarations of the same
940  /// decl. It will iterate at least once (when this decl is the only one).
943  }
944 
946  return redecl_iterator(const_cast<Decl *>(this));
947  }
948 
950 
951  /// Retrieve the previous declaration that declares the same entity
952  /// as this declaration, or NULL if there is no previous declaration.
954 
955  /// Retrieve the most recent declaration that declares the same entity
956  /// as this declaration, or NULL if there is no previous declaration.
957  const Decl *getPreviousDecl() const {
958  return const_cast<Decl *>(this)->getPreviousDeclImpl();
959  }
960 
961  /// True if this is the first declaration in its redeclaration chain.
962  bool isFirstDecl() const {
963  return getPreviousDecl() == nullptr;
964  }
965 
966  /// Retrieve the most recent declaration that declares the same entity
967  /// as this declaration (which may be this declaration).
969 
970  /// Retrieve the most recent declaration that declares the same entity
971  /// as this declaration (which may be this declaration).
972  const Decl *getMostRecentDecl() const {
973  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
974  }
975 
976  /// getBody - If this Decl represents a declaration for a body of code,
977  /// such as a function or method definition, this method returns the
978  /// top-level Stmt* of that body. Otherwise this method returns null.
979  virtual Stmt* getBody() const { return nullptr; }
980 
981  /// Returns true if this \c Decl represents a declaration for a body of
982  /// code, such as a function or method definition.
983  /// Note that \c hasBody can also return true if any redeclaration of this
984  /// \c Decl represents a declaration for a body of code.
985  virtual bool hasBody() const { return getBody() != nullptr; }
986 
987  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
988  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
990 
991  // global temp stats (until we have a per-module visitor)
992  static void add(Kind k);
993  static void EnableStatistics();
994  static void PrintStats();
995 
996  /// isTemplateParameter - Determines whether this declaration is a
997  /// template parameter.
998  bool isTemplateParameter() const;
999 
1000  /// isTemplateParameter - Determines whether this declaration is a
1001  /// template parameter pack.
1002  bool isTemplateParameterPack() const;
1003 
1004  /// Whether this declaration is a parameter pack.
1005  bool isParameterPack() const;
1006 
1007  /// returns true if this declaration is a template
1008  bool isTemplateDecl() const;
1009 
1010  /// Whether this declaration is a function or function template.
1012  return (DeclKind >= Decl::firstFunction &&
1013  DeclKind <= Decl::lastFunction) ||
1014  DeclKind == FunctionTemplate;
1015  }
1016 
1017  /// If this is a declaration that describes some template, this
1018  /// method returns that template declaration.
1020 
1021  /// Returns the function itself, or the templated function if this is a
1022  /// function template.
1023  FunctionDecl *getAsFunction() LLVM_READONLY;
1024 
1025  const FunctionDecl *getAsFunction() const {
1026  return const_cast<Decl *>(this)->getAsFunction();
1027  }
1028 
1029  /// Changes the namespace of this declaration to reflect that it's
1030  /// a function-local extern declaration.
1031  ///
1032  /// These declarations appear in the lexical context of the extern
1033  /// declaration, but in the semantic context of the enclosing namespace
1034  /// scope.
1036  Decl *Prev = getPreviousDecl();
1038 
1039  // It's OK for the declaration to still have the "invisible friend" flag or
1040  // the "conflicts with tag declarations in this scope" flag for the outer
1041  // scope.
1042  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1043  "namespace is not ordinary");
1044 
1046  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1048  }
1049 
1050  /// Determine whether this is a block-scope declaration with linkage.
1051  /// This will either be a local variable declaration declared 'extern', or a
1052  /// local function declaration.
1055  }
1056 
1057  /// Changes the namespace of this declaration to reflect that it's
1058  /// the object of a friend declaration.
1059  ///
1060  /// These declarations appear in the lexical context of the friending
1061  /// class, but in the semantic context of the actual entity. This property
1062  /// applies only to a specific decl object; other redeclarations of the
1063  /// same entity may not (and probably don't) share this property.
1064  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1065  unsigned OldNS = IdentifierNamespace;
1066  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1068  IDNS_LocalExtern)) &&
1069  "namespace includes neither ordinary nor tag");
1070  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1072  IDNS_LocalExtern)) &&
1073  "namespace includes other than ordinary or tag");
1074 
1075  Decl *Prev = getPreviousDecl();
1077 
1078  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1080  if (PerformFriendInjection ||
1081  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1083  }
1084 
1087  if (PerformFriendInjection ||
1088  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1090  }
1091  }
1092 
1094  FOK_None, ///< Not a friend object.
1095  FOK_Declared, ///< A friend of a previously-declared entity.
1096  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1097  };
1098 
1099  /// Determines whether this declaration is the object of a
1100  /// friend declaration and, if so, what kind.
1101  ///
1102  /// There is currently no direct way to find the associated FriendDecl.
1104  unsigned mask =
1106  if (!mask) return FOK_None;
1108  : FOK_Undeclared);
1109  }
1110 
1111  /// Specifies that this declaration is a C++ overloaded non-member.
1113  assert(getKind() == Function || getKind() == FunctionTemplate);
1114  assert((IdentifierNamespace & IDNS_Ordinary) &&
1115  "visible non-member operators should be in ordinary namespace");
1117  }
1118 
1119  static bool classofKind(Kind K) { return true; }
1120  static DeclContext *castToDeclContext(const Decl *);
1121  static Decl *castFromDeclContext(const DeclContext *);
1122 
1123  void print(raw_ostream &Out, unsigned Indentation = 0,
1124  bool PrintInstantiation = false) const;
1125  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1126  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1127  static void printGroup(Decl** Begin, unsigned NumDecls,
1128  raw_ostream &Out, const PrintingPolicy &Policy,
1129  unsigned Indentation = 0);
1130 
1131  // Debuggers don't usually respect default arguments.
1132  void dump() const;
1133 
1134  // Same as dump(), but forces color printing.
1135  void dumpColor() const;
1136 
1137  void dump(raw_ostream &Out, bool Deserialize = false) const;
1138 
1139  /// \return Unique reproducible object identifier
1140  int64_t getID() const;
1141 
1142  /// Looks through the Decl's underlying type to extract a FunctionType
1143  /// when possible. Will return null if the type underlying the Decl does not
1144  /// have a FunctionType.
1145  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1146 
1147 private:
1148  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1149  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1150  ASTContext &Ctx);
1151 
1152 protected:
1154 };
1155 
1156 /// Determine whether two declarations declare the same entity.
1157 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1158  if (!D1 || !D2)
1159  return false;
1160 
1161  if (D1 == D2)
1162  return true;
1163 
1164  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1165 }
1166 
1167 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1168 /// doing something to a specific decl.
1169 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1170  const Decl *TheDecl;
1171  SourceLocation Loc;
1172  SourceManager &SM;
1173  const char *Message;
1174 
1175 public:
1177  SourceManager &sm, const char *Msg)
1178  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1179 
1180  void print(raw_ostream &OS) const override;
1181 };
1182 
1183 /// The results of name lookup within a DeclContext. This is either a
1184 /// single result (with no stable storage) or a collection of results (with
1185 /// stable storage provided by the lookup table).
1188 
1189  ResultTy Result;
1190 
1191  // If there is only one lookup result, it would be invalidated by
1192  // reallocations of the name table, so store it separately.
1193  NamedDecl *Single = nullptr;
1194 
1195  static NamedDecl *const SingleElementDummyList;
1196 
1197 public:
1198  DeclContextLookupResult() = default;
1200  : Result(Result) {}
1202  : Result(SingleElementDummyList), Single(Single) {}
1203 
1204  class iterator;
1205 
1206  using IteratorBase =
1207  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1208  std::random_access_iterator_tag,
1209  NamedDecl *const>;
1210 
1211  class iterator : public IteratorBase {
1212  value_type SingleElement;
1213 
1214  public:
1215  explicit iterator(pointer Pos, value_type Single = nullptr)
1216  : IteratorBase(Pos), SingleElement(Single) {}
1217 
1219  return SingleElement ? SingleElement : IteratorBase::operator*();
1220  }
1221  };
1222 
1223  using const_iterator = iterator;
1224  using pointer = iterator::pointer;
1225  using reference = iterator::reference;
1226 
1227  iterator begin() const { return iterator(Result.begin(), Single); }
1228  iterator end() const { return iterator(Result.end(), Single); }
1229 
1230  bool empty() const { return Result.empty(); }
1231  pointer data() const { return Single ? &Single : Result.data(); }
1232  size_t size() const { return Single ? 1 : Result.size(); }
1233  reference front() const { return Single ? Single : Result.front(); }
1234  reference back() const { return Single ? Single : Result.back(); }
1235  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1236 
1237  // FIXME: Remove this from the interface
1238  DeclContextLookupResult slice(size_t N) const {
1239  DeclContextLookupResult Sliced = Result.slice(N);
1240  Sliced.Single = Single;
1241  return Sliced;
1242  }
1243 };
1244 
1245 /// DeclContext - This is used only as base class of specific decl types that
1246 /// can act as declaration contexts. These decls are (only the top classes
1247 /// that directly derive from DeclContext are mentioned, not their subclasses):
1248 ///
1249 /// TranslationUnitDecl
1250 /// ExternCContext
1251 /// NamespaceDecl
1252 /// TagDecl
1253 /// OMPDeclareReductionDecl
1254 /// FunctionDecl
1255 /// ObjCMethodDecl
1256 /// ObjCContainerDecl
1257 /// LinkageSpecDecl
1258 /// ExportDecl
1259 /// BlockDecl
1260 /// CapturedDecl
1262  /// For makeDeclVisibleInContextImpl
1263  friend class ASTDeclReader;
1264  /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap,
1265  /// hasNeedToReconcileExternalVisibleStorage
1266  friend class ExternalASTSource;
1267  /// For CreateStoredDeclsMap
1268  friend class DependentDiagnostic;
1269  /// For hasNeedToReconcileExternalVisibleStorage,
1270  /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups
1271  friend class ASTWriter;
1272 
1273  // We use uint64_t in the bit-fields below since some bit-fields
1274  // cross the unsigned boundary and this breaks the packing.
1275 
1276  /// Stores the bits used by DeclContext.
1277  /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor
1278  /// methods in DeclContext should be updated appropriately.
1279  class DeclContextBitfields {
1280  friend class DeclContext;
1281  /// DeclKind - This indicates which class this is.
1282  uint64_t DeclKind : 7;
1283 
1284  /// Whether this declaration context also has some external
1285  /// storage that contains additional declarations that are lexically
1286  /// part of this context.
1287  mutable uint64_t ExternalLexicalStorage : 1;
1288 
1289  /// Whether this declaration context also has some external
1290  /// storage that contains additional declarations that are visible
1291  /// in this context.
1292  mutable uint64_t ExternalVisibleStorage : 1;
1293 
1294  /// Whether this declaration context has had externally visible
1295  /// storage added since the last lookup. In this case, \c LookupPtr's
1296  /// invariant may not hold and needs to be fixed before we perform
1297  /// another lookup.
1298  mutable uint64_t NeedToReconcileExternalVisibleStorage : 1;
1299 
1300  /// If \c true, this context may have local lexical declarations
1301  /// that are missing from the lookup table.
1302  mutable uint64_t HasLazyLocalLexicalLookups : 1;
1303 
1304  /// If \c true, the external source may have lexical declarations
1305  /// that are missing from the lookup table.
1306  mutable uint64_t HasLazyExternalLexicalLookups : 1;
1307 
1308  /// If \c true, lookups should only return identifier from
1309  /// DeclContext scope (for example TranslationUnit). Used in
1310  /// LookupQualifiedName()
1311  mutable uint64_t UseQualifiedLookup : 1;
1312  };
1313 
1314  /// Number of bits in DeclContextBitfields.
1315  enum { NumDeclContextBits = 13 };
1316 
1317  /// Stores the bits used by TagDecl.
1318  /// If modified NumTagDeclBits and the accessor
1319  /// methods in TagDecl should be updated appropriately.
1320  class TagDeclBitfields {
1321  friend class TagDecl;
1322  /// For the bits in DeclContextBitfields
1323  uint64_t : NumDeclContextBits;
1324 
1325  /// The TagKind enum.
1326  uint64_t TagDeclKind : 3;
1327 
1328  /// True if this is a definition ("struct foo {};"), false if it is a
1329  /// declaration ("struct foo;"). It is not considered a definition
1330  /// until the definition has been fully processed.
1331  uint64_t IsCompleteDefinition : 1;
1332 
1333  /// True if this is currently being defined.
1334  uint64_t IsBeingDefined : 1;
1335 
1336  /// True if this tag declaration is "embedded" (i.e., defined or declared
1337  /// for the very first time) in the syntax of a declarator.
1338  uint64_t IsEmbeddedInDeclarator : 1;
1339 
1340  /// True if this tag is free standing, e.g. "struct foo;".
1341  uint64_t IsFreeStanding : 1;
1342 
1343  /// Indicates whether it is possible for declarations of this kind
1344  /// to have an out-of-date definition.
1345  ///
1346  /// This option is only enabled when modules are enabled.
1347  uint64_t MayHaveOutOfDateDef : 1;
1348 
1349  /// Has the full definition of this type been required by a use somewhere in
1350  /// the TU.
1351  uint64_t IsCompleteDefinitionRequired : 1;
1352  };
1353 
1354  /// Number of non-inherited bits in TagDeclBitfields.
1355  enum { NumTagDeclBits = 9 };
1356 
1357  /// Stores the bits used by EnumDecl.
1358  /// If modified NumEnumDeclBit and the accessor
1359  /// methods in EnumDecl should be updated appropriately.
1360  class EnumDeclBitfields {
1361  friend class EnumDecl;
1362  /// For the bits in DeclContextBitfields.
1363  uint64_t : NumDeclContextBits;
1364  /// For the bits in TagDeclBitfields.
1365  uint64_t : NumTagDeclBits;
1366 
1367  /// Width in bits required to store all the non-negative
1368  /// enumerators of this enum.
1369  uint64_t NumPositiveBits : 8;
1370 
1371  /// Width in bits required to store all the negative
1372  /// enumerators of this enum.
1373  uint64_t NumNegativeBits : 8;
1374 
1375  /// True if this tag declaration is a scoped enumeration. Only
1376  /// possible in C++11 mode.
1377  uint64_t IsScoped : 1;
1378 
1379  /// If this tag declaration is a scoped enum,
1380  /// then this is true if the scoped enum was declared using the class
1381  /// tag, false if it was declared with the struct tag. No meaning is
1382  /// associated if this tag declaration is not a scoped enum.
1383  uint64_t IsScopedUsingClassTag : 1;
1384 
1385  /// True if this is an enumeration with fixed underlying type. Only
1386  /// possible in C++11, Microsoft extensions, or Objective C mode.
1387  uint64_t IsFixed : 1;
1388 
1389  /// True if a valid hash is stored in ODRHash.
1390  uint64_t HasODRHash : 1;
1391  };
1392 
1393  /// Number of non-inherited bits in EnumDeclBitfields.
1394  enum { NumEnumDeclBits = 20 };
1395 
1396  /// Stores the bits used by RecordDecl.
1397  /// If modified NumRecordDeclBits and the accessor
1398  /// methods in RecordDecl should be updated appropriately.
1399  class RecordDeclBitfields {
1400  friend class RecordDecl;
1401  /// For the bits in DeclContextBitfields.
1402  uint64_t : NumDeclContextBits;
1403  /// For the bits in TagDeclBitfields.
1404  uint64_t : NumTagDeclBits;
1405 
1406  /// This is true if this struct ends with a flexible
1407  /// array member (e.g. int X[]) or if this union contains a struct that does.
1408  /// If so, this cannot be contained in arrays or other structs as a member.
1409  uint64_t HasFlexibleArrayMember : 1;
1410 
1411  /// Whether this is the type of an anonymous struct or union.
1412  uint64_t AnonymousStructOrUnion : 1;
1413 
1414  /// This is true if this struct has at least one member
1415  /// containing an Objective-C object pointer type.
1416  uint64_t HasObjectMember : 1;
1417 
1418  /// This is true if struct has at least one member of
1419  /// 'volatile' type.
1420  uint64_t HasVolatileMember : 1;
1421 
1422  /// Whether the field declarations of this record have been loaded
1423  /// from external storage. To avoid unnecessary deserialization of
1424  /// methods/nested types we allow deserialization of just the fields
1425  /// when needed.
1426  mutable uint64_t LoadedFieldsFromExternalStorage : 1;
1427 
1428  /// Basic properties of non-trivial C structs.
1429  uint64_t NonTrivialToPrimitiveDefaultInitialize : 1;
1430  uint64_t NonTrivialToPrimitiveCopy : 1;
1431  uint64_t NonTrivialToPrimitiveDestroy : 1;
1432 
1433  /// Indicates whether this struct is destroyed in the callee.
1434  uint64_t ParamDestroyedInCallee : 1;
1435 
1436  /// Represents the way this type is passed to a function.
1437  uint64_t ArgPassingRestrictions : 2;
1438  };
1439 
1440  /// Number of non-inherited bits in RecordDeclBitfields.
1441  enum { NumRecordDeclBits = 11 };
1442 
1443  /// Stores the bits used by OMPDeclareReductionDecl.
1444  /// If modified NumOMPDeclareReductionDeclBits and the accessor
1445  /// methods in OMPDeclareReductionDecl should be updated appropriately.
1446  class OMPDeclareReductionDeclBitfields {
1447  friend class OMPDeclareReductionDecl;
1448  /// For the bits in DeclContextBitfields
1449  uint64_t : NumDeclContextBits;
1450 
1451  /// Kind of initializer,
1452  /// function call or omp_priv<init_expr> initializtion.
1453  uint64_t InitializerKind : 2;
1454  };
1455 
1456  /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields.
1457  enum { NumOMPDeclareReductionDeclBits = 2 };
1458 
1459  /// Stores the bits used by FunctionDecl.
1460  /// If modified NumFunctionDeclBits and the accessor
1461  /// methods in FunctionDecl and CXXDeductionGuideDecl
1462  /// (for IsCopyDeductionCandidate) should be updated appropriately.
1463  class FunctionDeclBitfields {
1464  friend class FunctionDecl;
1465  /// For IsCopyDeductionCandidate
1466  friend class CXXDeductionGuideDecl;
1467  /// For the bits in DeclContextBitfields.
1468  uint64_t : NumDeclContextBits;
1469 
1470  uint64_t SClass : 3;
1471  uint64_t IsInline : 1;
1472  uint64_t IsInlineSpecified : 1;
1473 
1474  /// This is shared by CXXConstructorDecl,
1475  /// CXXConversionDecl, and CXXDeductionGuideDecl.
1476  uint64_t IsExplicitSpecified : 1;
1477 
1478  uint64_t IsVirtualAsWritten : 1;
1479  uint64_t IsPure : 1;
1480  uint64_t HasInheritedPrototype : 1;
1481  uint64_t HasWrittenPrototype : 1;
1482  uint64_t IsDeleted : 1;
1483  /// Used by CXXMethodDecl
1484  uint64_t IsTrivial : 1;
1485 
1486  /// This flag indicates whether this function is trivial for the purpose of
1487  /// calls. This is meaningful only when this function is a copy/move
1488  /// constructor or a destructor.
1489  uint64_t IsTrivialForCall : 1;
1490 
1491  /// Used by CXXMethodDecl
1492  uint64_t IsDefaulted : 1;
1493  /// Used by CXXMethodDecl
1494  uint64_t IsExplicitlyDefaulted : 1;
1495  uint64_t HasImplicitReturnZero : 1;
1496  uint64_t IsLateTemplateParsed : 1;
1497  uint64_t IsConstexpr : 1;
1498  uint64_t InstantiationIsPending : 1;
1499 
1500  /// Indicates if the function uses __try.
1501  uint64_t UsesSEHTry : 1;
1502 
1503  /// Indicates if the function was a definition
1504  /// but its body was skipped.
1505  uint64_t HasSkippedBody : 1;
1506 
1507  /// Indicates if the function declaration will
1508  /// have a body, once we're done parsing it.
1509  uint64_t WillHaveBody : 1;
1510 
1511  /// Indicates that this function is a multiversioned
1512  /// function using attribute 'target'.
1513  uint64_t IsMultiVersion : 1;
1514 
1515  /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that
1516  /// the Deduction Guide is the implicitly generated 'copy
1517  /// deduction candidate' (is used during overload resolution).
1518  uint64_t IsCopyDeductionCandidate : 1;
1519 
1520  /// Store the ODRHash after first calculation.
1521  uint64_t HasODRHash : 1;
1522  };
1523 
1524  /// Number of non-inherited bits in FunctionDeclBitfields.
1525  enum { NumFunctionDeclBits = 25 };
1526 
1527  /// Stores the bits used by CXXConstructorDecl. If modified
1528  /// NumCXXConstructorDeclBits and the accessor
1529  /// methods in CXXConstructorDecl should be updated appropriately.
1530  class CXXConstructorDeclBitfields {
1531  friend class CXXConstructorDecl;
1532  /// For the bits in DeclContextBitfields.
1533  uint64_t : NumDeclContextBits;
1534  /// For the bits in FunctionDeclBitfields.
1535  uint64_t : NumFunctionDeclBits;
1536 
1537  /// 25 bits to fit in the remaining availible space.
1538  /// Note that this makes CXXConstructorDeclBitfields take
1539  /// exactly 64 bits and thus the width of NumCtorInitializers
1540  /// will need to be shrunk if some bit is added to NumDeclContextBitfields,
1541  /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields.
1542  uint64_t NumCtorInitializers : 25;
1543  uint64_t IsInheritingConstructor : 1;
1544  };
1545 
1546  /// Number of non-inherited bits in CXXConstructorDeclBitfields.
1547  enum { NumCXXConstructorDeclBits = 26 };
1548 
1549  /// Stores the bits used by ObjCMethodDecl.
1550  /// If modified NumObjCMethodDeclBits and the accessor
1551  /// methods in ObjCMethodDecl should be updated appropriately.
1552  class ObjCMethodDeclBitfields {
1553  friend class ObjCMethodDecl;
1554 
1555  /// For the bits in DeclContextBitfields.
1556  uint64_t : NumDeclContextBits;
1557 
1558  /// The conventional meaning of this method; an ObjCMethodFamily.
1559  /// This is not serialized; instead, it is computed on demand and
1560  /// cached.
1561  mutable uint64_t Family : ObjCMethodFamilyBitWidth;
1562 
1563  /// instance (true) or class (false) method.
1564  uint64_t IsInstance : 1;
1565  uint64_t IsVariadic : 1;
1566 
1567  /// True if this method is the getter or setter for an explicit property.
1568  uint64_t IsPropertyAccessor : 1;
1569 
1570  /// Method has a definition.
1571  uint64_t IsDefined : 1;
1572 
1573  /// Method redeclaration in the same interface.
1574  uint64_t IsRedeclaration : 1;
1575 
1576  /// Is redeclared in the same interface.
1577  mutable uint64_t HasRedeclaration : 1;
1578 
1579  /// \@required/\@optional
1580  uint64_t DeclImplementation : 2;
1581 
1582  /// in, inout, etc.
1583  uint64_t objcDeclQualifier : 7;
1584 
1585  /// Indicates whether this method has a related result type.
1586  uint64_t RelatedResultType : 1;
1587 
1588  /// Whether the locations of the selector identifiers are in a
1589  /// "standard" position, a enum SelectorLocationsKind.
1590  uint64_t SelLocsKind : 2;
1591 
1592  /// Whether this method overrides any other in the class hierarchy.
1593  ///
1594  /// A method is said to override any method in the class's
1595  /// base classes, its protocols, or its categories' protocols, that has
1596  /// the same selector and is of the same kind (class or instance).
1597  /// A method in an implementation is not considered as overriding the same
1598  /// method in the interface or its categories.
1599  uint64_t IsOverriding : 1;
1600 
1601  /// Indicates if the method was a definition but its body was skipped.
1602  uint64_t HasSkippedBody : 1;
1603  };
1604 
1605  /// Number of non-inherited bits in ObjCMethodDeclBitfields.
1606  enum { NumObjCMethodDeclBits = 24 };
1607 
1608  /// Stores the bits used by ObjCContainerDecl.
1609  /// If modified NumObjCContainerDeclBits and the accessor
1610  /// methods in ObjCContainerDecl should be updated appropriately.
1611  class ObjCContainerDeclBitfields {
1612  friend class ObjCContainerDecl;
1613  /// For the bits in DeclContextBitfields
1614  uint32_t : NumDeclContextBits;
1615 
1616  // Not a bitfield but this saves space.
1617  // Note that ObjCContainerDeclBitfields is full.
1618  SourceLocation AtStart;
1619  };
1620 
1621  /// Number of non-inherited bits in ObjCContainerDeclBitfields.
1622  /// Note that here we rely on the fact that SourceLocation is 32 bits
1623  /// wide. We check this with the static_assert in the ctor of DeclContext.
1624  enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits };
1625 
1626  /// Stores the bits used by LinkageSpecDecl.
1627  /// If modified NumLinkageSpecDeclBits and the accessor
1628  /// methods in LinkageSpecDecl should be updated appropriately.
1629  class LinkageSpecDeclBitfields {
1630  friend class LinkageSpecDecl;
1631  /// For the bits in DeclContextBitfields.
1632  uint64_t : NumDeclContextBits;
1633 
1634  /// The language for this linkage specification with values
1635  /// in the enum LinkageSpecDecl::LanguageIDs.
1636  uint64_t Language : 3;
1637 
1638  /// True if this linkage spec has braces.
1639  /// This is needed so that hasBraces() returns the correct result while the
1640  /// linkage spec body is being parsed. Once RBraceLoc has been set this is
1641  /// not used, so it doesn't need to be serialized.
1642  uint64_t HasBraces : 1;
1643  };
1644 
1645  /// Number of non-inherited bits in LinkageSpecDeclBitfields.
1646  enum { NumLinkageSpecDeclBits = 4 };
1647 
1648  /// Stores the bits used by BlockDecl.
1649  /// If modified NumBlockDeclBits and the accessor
1650  /// methods in BlockDecl should be updated appropriately.
1651  class BlockDeclBitfields {
1652  friend class BlockDecl;
1653  /// For the bits in DeclContextBitfields.
1654  uint64_t : NumDeclContextBits;
1655 
1656  uint64_t IsVariadic : 1;
1657  uint64_t CapturesCXXThis : 1;
1658  uint64_t BlockMissingReturnType : 1;
1659  uint64_t IsConversionFromLambda : 1;
1660 
1661  /// A bit that indicates this block is passed directly to a function as a
1662  /// non-escaping parameter.
1663  uint64_t DoesNotEscape : 1;
1664  };
1665 
1666  /// Number of non-inherited bits in BlockDeclBitfields.
1667  enum { NumBlockDeclBits = 5 };
1668 
1669  /// Pointer to the data structure used to lookup declarations
1670  /// within this context (or a DependentStoredDeclsMap if this is a
1671  /// dependent context). We maintain the invariant that, if the map
1672  /// contains an entry for a DeclarationName (and we haven't lazily
1673  /// omitted anything), then it contains all relevant entries for that
1674  /// name (modulo the hasExternalDecls() flag).
1675  mutable StoredDeclsMap *LookupPtr = nullptr;
1676 
1677 protected:
1678  /// This anonymous union stores the bits belonging to DeclContext and classes
1679  /// deriving from it. The goal is to use otherwise wasted
1680  /// space in DeclContext to store data belonging to derived classes.
1681  /// The space saved is especially significient when pointers are aligned
1682  /// to 8 bytes. In this case due to alignment requirements we have a
1683  /// little less than 8 bytes free in DeclContext which we can use.
1684  /// We check that none of the classes in this union is larger than
1685  /// 8 bytes with static_asserts in the ctor of DeclContext.
1686  union {
1687  DeclContextBitfields DeclContextBits;
1688  TagDeclBitfields TagDeclBits;
1689  EnumDeclBitfields EnumDeclBits;
1690  RecordDeclBitfields RecordDeclBits;
1691  OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits;
1692  FunctionDeclBitfields FunctionDeclBits;
1693  CXXConstructorDeclBitfields CXXConstructorDeclBits;
1694  ObjCMethodDeclBitfields ObjCMethodDeclBits;
1695  ObjCContainerDeclBitfields ObjCContainerDeclBits;
1696  LinkageSpecDeclBitfields LinkageSpecDeclBits;
1697  BlockDeclBitfields BlockDeclBits;
1698 
1699  static_assert(sizeof(DeclContextBitfields) <= 8,
1700  "DeclContextBitfields is larger than 8 bytes!");
1701  static_assert(sizeof(TagDeclBitfields) <= 8,
1702  "TagDeclBitfields is larger than 8 bytes!");
1703  static_assert(sizeof(EnumDeclBitfields) <= 8,
1704  "EnumDeclBitfields is larger than 8 bytes!");
1705  static_assert(sizeof(RecordDeclBitfields) <= 8,
1706  "RecordDeclBitfields is larger than 8 bytes!");
1707  static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8,
1708  "OMPDeclareReductionDeclBitfields is larger than 8 bytes!");
1709  static_assert(sizeof(FunctionDeclBitfields) <= 8,
1710  "FunctionDeclBitfields is larger than 8 bytes!");
1711  static_assert(sizeof(CXXConstructorDeclBitfields) <= 8,
1712  "CXXConstructorDeclBitfields is larger than 8 bytes!");
1713  static_assert(sizeof(ObjCMethodDeclBitfields) <= 8,
1714  "ObjCMethodDeclBitfields is larger than 8 bytes!");
1715  static_assert(sizeof(ObjCContainerDeclBitfields) <= 8,
1716  "ObjCContainerDeclBitfields is larger than 8 bytes!");
1717  static_assert(sizeof(LinkageSpecDeclBitfields) <= 8,
1718  "LinkageSpecDeclBitfields is larger than 8 bytes!");
1719  static_assert(sizeof(BlockDeclBitfields) <= 8,
1720  "BlockDeclBitfields is larger than 8 bytes!");
1721  };
1722 
1723  /// FirstDecl - The first declaration stored within this declaration
1724  /// context.
1725  mutable Decl *FirstDecl = nullptr;
1726 
1727  /// LastDecl - The last declaration stored within this declaration
1728  /// context. FIXME: We could probably cache this value somewhere
1729  /// outside of the DeclContext, to reduce the size of DeclContext by
1730  /// another pointer.
1731  mutable Decl *LastDecl = nullptr;
1732 
1733  /// Build up a chain of declarations.
1734  ///
1735  /// \returns the first/last pair of declarations.
1736  static std::pair<Decl *, Decl *>
1737  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1738 
1740 
1741 public:
1742  ~DeclContext();
1743 
1745  return static_cast<Decl::Kind>(DeclContextBits.DeclKind);
1746  }
1747 
1748  const char *getDeclKindName() const;
1749 
1750  /// getParent - Returns the containing DeclContext.
1752  return cast<Decl>(this)->getDeclContext();
1753  }
1754  const DeclContext *getParent() const {
1755  return const_cast<DeclContext*>(this)->getParent();
1756  }
1757 
1758  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1759  /// different from getParent, e.g.:
1760  ///
1761  /// namespace A {
1762  /// struct S;
1763  /// }
1764  /// struct A::S {}; // getParent() == namespace 'A'
1765  /// // getLexicalParent() == translation unit
1766  ///
1768  return cast<Decl>(this)->getLexicalDeclContext();
1769  }
1771  return const_cast<DeclContext*>(this)->getLexicalParent();
1772  }
1773 
1774  DeclContext *getLookupParent();
1775 
1776  const DeclContext *getLookupParent() const {
1777  return const_cast<DeclContext*>(this)->getLookupParent();
1778  }
1779 
1781  return cast<Decl>(this)->getASTContext();
1782  }
1783 
1784  bool isClosure() const { return getDeclKind() == Decl::Block; }
1785 
1786  bool isObjCContainer() const {
1787  switch (getDeclKind()) {
1788  case Decl::ObjCCategory:
1789  case Decl::ObjCCategoryImpl:
1790  case Decl::ObjCImplementation:
1791  case Decl::ObjCInterface:
1792  case Decl::ObjCProtocol:
1793  return true;
1794  default:
1795  return false;
1796  }
1797  }
1798 
1799  bool isFunctionOrMethod() const {
1800  switch (getDeclKind()) {
1801  case Decl::Block:
1802  case Decl::Captured:
1803  case Decl::ObjCMethod:
1804  return true;
1805  default:
1806  return getDeclKind() >= Decl::firstFunction &&
1807  getDeclKind() <= Decl::lastFunction;
1808  }
1809  }
1810 
1811  /// Test whether the context supports looking up names.
1812  bool isLookupContext() const {
1813  return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec &&
1814  getDeclKind() != Decl::Export;
1815  }
1816 
1817  bool isFileContext() const {
1818  return getDeclKind() == Decl::TranslationUnit ||
1819  getDeclKind() == Decl::Namespace;
1820  }
1821 
1822  bool isTranslationUnit() const {
1823  return getDeclKind() == Decl::TranslationUnit;
1824  }
1825 
1826  bool isRecord() const {
1827  return getDeclKind() >= Decl::firstRecord &&
1828  getDeclKind() <= Decl::lastRecord;
1829  }
1830 
1831  bool isNamespace() const { return getDeclKind() == Decl::Namespace; }
1832 
1833  bool isStdNamespace() const;
1834 
1835  bool isInlineNamespace() const;
1836 
1837  /// Determines whether this context is dependent on a
1838  /// template parameter.
1839  bool isDependentContext() const;
1840 
1841  /// isTransparentContext - Determines whether this context is a
1842  /// "transparent" context, meaning that the members declared in this
1843  /// context are semantically declared in the nearest enclosing
1844  /// non-transparent (opaque) context but are lexically declared in
1845  /// this context. For example, consider the enumerators of an
1846  /// enumeration type:
1847  /// @code
1848  /// enum E {
1849  /// Val1
1850  /// };
1851  /// @endcode
1852  /// Here, E is a transparent context, so its enumerator (Val1) will
1853  /// appear (semantically) that it is in the same context of E.
1854  /// Examples of transparent contexts include: enumerations (except for
1855  /// C++0x scoped enums), and C++ linkage specifications.
1856  bool isTransparentContext() const;
1857 
1858  /// Determines whether this context or some of its ancestors is a
1859  /// linkage specification context that specifies C linkage.
1860  bool isExternCContext() const;
1861 
1862  /// Retrieve the nearest enclosing C linkage specification context.
1863  const LinkageSpecDecl *getExternCContext() const;
1864 
1865  /// Determines whether this context or some of its ancestors is a
1866  /// linkage specification context that specifies C++ linkage.
1867  bool isExternCXXContext() const;
1868 
1869  /// Determine whether this declaration context is equivalent
1870  /// to the declaration context DC.
1871  bool Equals(const DeclContext *DC) const {
1872  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1873  }
1874 
1875  /// Determine whether this declaration context encloses the
1876  /// declaration context DC.
1877  bool Encloses(const DeclContext *DC) const;
1878 
1879  /// Find the nearest non-closure ancestor of this context,
1880  /// i.e. the innermost semantic parent of this context which is not
1881  /// a closure. A context may be its own non-closure ancestor.
1882  Decl *getNonClosureAncestor();
1883  const Decl *getNonClosureAncestor() const {
1884  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1885  }
1886 
1887  /// getPrimaryContext - There may be many different
1888  /// declarations of the same entity (including forward declarations
1889  /// of classes, multiple definitions of namespaces, etc.), each with
1890  /// a different set of declarations. This routine returns the
1891  /// "primary" DeclContext structure, which will contain the
1892  /// information needed to perform name lookup into this context.
1893  DeclContext *getPrimaryContext();
1895  return const_cast<DeclContext*>(this)->getPrimaryContext();
1896  }
1897 
1898  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1899  /// other entities of the same name, or where it is a redeclaration if the
1900  /// two entities are compatible. This skips through transparent contexts.
1901  DeclContext *getRedeclContext();
1903  return const_cast<DeclContext *>(this)->getRedeclContext();
1904  }
1905 
1906  /// Retrieve the nearest enclosing namespace context.
1907  DeclContext *getEnclosingNamespaceContext();
1909  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1910  }
1911 
1912  /// Retrieve the outermost lexically enclosing record context.
1913  RecordDecl *getOuterLexicalRecordContext();
1915  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1916  }
1917 
1918  /// Test if this context is part of the enclosing namespace set of
1919  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1920  /// isn't a namespace, this is equivalent to Equals().
1921  ///
1922  /// The enclosing namespace set of a namespace is the namespace and, if it is
1923  /// inline, its enclosing namespace, recursively.
1924  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1925 
1926  /// Collects all of the declaration contexts that are semantically
1927  /// connected to this declaration context.
1928  ///
1929  /// For declaration contexts that have multiple semantically connected but
1930  /// syntactically distinct contexts, such as C++ namespaces, this routine
1931  /// retrieves the complete set of such declaration contexts in source order.
1932  /// For example, given:
1933  ///
1934  /// \code
1935  /// namespace N {
1936  /// int x;
1937  /// }
1938  /// namespace N {
1939  /// int y;
1940  /// }
1941  /// \endcode
1942  ///
1943  /// The \c Contexts parameter will contain both definitions of N.
1944  ///
1945  /// \param Contexts Will be cleared and set to the set of declaration
1946  /// contexts that are semanticaly connected to this declaration context,
1947  /// in source order, including this context (which may be the only result,
1948  /// for non-namespace contexts).
1949  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1950 
1951  /// decl_iterator - Iterates through the declarations stored
1952  /// within this context.
1954  /// Current - The current declaration.
1955  Decl *Current = nullptr;
1956 
1957  public:
1958  using value_type = Decl *;
1959  using reference = const value_type &;
1960  using pointer = const value_type *;
1961  using iterator_category = std::forward_iterator_tag;
1963 
1964  decl_iterator() = default;
1965  explicit decl_iterator(Decl *C) : Current(C) {}
1966 
1967  reference operator*() const { return Current; }
1968 
1969  // This doesn't meet the iterator requirements, but it's convenient
1970  value_type operator->() const { return Current; }
1971 
1973  Current = Current->getNextDeclInContext();
1974  return *this;
1975  }
1976 
1978  decl_iterator tmp(*this);
1979  ++(*this);
1980  return tmp;
1981  }
1982 
1984  return x.Current == y.Current;
1985  }
1986 
1988  return x.Current != y.Current;
1989  }
1990  };
1991 
1992  using decl_range = llvm::iterator_range<decl_iterator>;
1993 
1994  /// decls_begin/decls_end - Iterate over the declarations stored in
1995  /// this context.
1996  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1997  decl_iterator decls_begin() const;
1998  decl_iterator decls_end() const { return decl_iterator(); }
1999  bool decls_empty() const;
2000 
2001  /// noload_decls_begin/end - Iterate over the declarations stored in this
2002  /// context that are currently loaded; don't attempt to retrieve anything
2003  /// from an external source.
2005  return decl_range(noload_decls_begin(), noload_decls_end());
2006  }
2007  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
2009 
2010  /// specific_decl_iterator - Iterates over a subrange of
2011  /// declarations stored in a DeclContext, providing only those that
2012  /// are of type SpecificDecl (or a class derived from it). This
2013  /// iterator is used, for example, to provide iteration over just
2014  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
2015  template<typename SpecificDecl>
2017  /// Current - The current, underlying declaration iterator, which
2018  /// will either be NULL or will point to a declaration of
2019  /// type SpecificDecl.
2021 
2022  /// SkipToNextDecl - Advances the current position up to the next
2023  /// declaration of type SpecificDecl that also meets the criteria
2024  /// required by Acceptable.
2025  void SkipToNextDecl() {
2026  while (*Current && !isa<SpecificDecl>(*Current))
2027  ++Current;
2028  }
2029 
2030  public:
2031  using value_type = SpecificDecl *;
2032  // TODO: Add reference and pointer types (with some appropriate proxy type)
2033  // if we ever have a need for them.
2034  using reference = void;
2035  using pointer = void;
2036  using difference_type =
2037  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2038  using iterator_category = std::forward_iterator_tag;
2039 
2040  specific_decl_iterator() = default;
2041 
2042  /// specific_decl_iterator - Construct a new iterator over a
2043  /// subset of the declarations the range [C,
2044  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2045  /// member function of SpecificDecl that should return true for
2046  /// all of the SpecificDecl instances that will be in the subset
2047  /// of iterators. For example, if you want Objective-C instance
2048  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2049  /// &ObjCMethodDecl::isInstanceMethod.
2051  SkipToNextDecl();
2052  }
2053 
2054  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2055 
2056  // This doesn't meet the iterator requirements, but it's convenient
2057  value_type operator->() const { return **this; }
2058 
2060  ++Current;
2061  SkipToNextDecl();
2062  return *this;
2063  }
2064 
2066  specific_decl_iterator tmp(*this);
2067  ++(*this);
2068  return tmp;
2069  }
2070 
2071  friend bool operator==(const specific_decl_iterator& x,
2072  const specific_decl_iterator& y) {
2073  return x.Current == y.Current;
2074  }
2075 
2076  friend bool operator!=(const specific_decl_iterator& x,
2077  const specific_decl_iterator& y) {
2078  return x.Current != y.Current;
2079  }
2080  };
2081 
2082  /// Iterates over a filtered subrange of declarations stored
2083  /// in a DeclContext.
2084  ///
2085  /// This iterator visits only those declarations that are of type
2086  /// SpecificDecl (or a class derived from it) and that meet some
2087  /// additional run-time criteria. This iterator is used, for
2088  /// example, to provide access to the instance methods within an
2089  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
2090  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
2091  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
2093  /// Current - The current, underlying declaration iterator, which
2094  /// will either be NULL or will point to a declaration of
2095  /// type SpecificDecl.
2097 
2098  /// SkipToNextDecl - Advances the current position up to the next
2099  /// declaration of type SpecificDecl that also meets the criteria
2100  /// required by Acceptable.
2101  void SkipToNextDecl() {
2102  while (*Current &&
2103  (!isa<SpecificDecl>(*Current) ||
2104  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
2105  ++Current;
2106  }
2107 
2108  public:
2109  using value_type = SpecificDecl *;
2110  // TODO: Add reference and pointer types (with some appropriate proxy type)
2111  // if we ever have a need for them.
2112  using reference = void;
2113  using pointer = void;
2114  using difference_type =
2115  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2116  using iterator_category = std::forward_iterator_tag;
2117 
2118  filtered_decl_iterator() = default;
2119 
2120  /// filtered_decl_iterator - Construct a new iterator over a
2121  /// subset of the declarations the range [C,
2122  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2123  /// member function of SpecificDecl that should return true for
2124  /// all of the SpecificDecl instances that will be in the subset
2125  /// of iterators. For example, if you want Objective-C instance
2126  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2127  /// &ObjCMethodDecl::isInstanceMethod.
2129  SkipToNextDecl();
2130  }
2131 
2132  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2133  value_type operator->() const { return cast<SpecificDecl>(*Current); }
2134 
2136  ++Current;
2137  SkipToNextDecl();
2138  return *this;
2139  }
2140 
2142  filtered_decl_iterator tmp(*this);
2143  ++(*this);
2144  return tmp;
2145  }
2146 
2147  friend bool operator==(const filtered_decl_iterator& x,
2148  const filtered_decl_iterator& y) {
2149  return x.Current == y.Current;
2150  }
2151 
2152  friend bool operator!=(const filtered_decl_iterator& x,
2153  const filtered_decl_iterator& y) {
2154  return x.Current != y.Current;
2155  }
2156  };
2157 
2158  /// Add the declaration D into this context.
2159  ///
2160  /// This routine should be invoked when the declaration D has first
2161  /// been declared, to place D into the context where it was
2162  /// (lexically) defined. Every declaration must be added to one
2163  /// (and only one!) context, where it can be visited via
2164  /// [decls_begin(), decls_end()). Once a declaration has been added
2165  /// to its lexical context, the corresponding DeclContext owns the
2166  /// declaration.
2167  ///
2168  /// If D is also a NamedDecl, it will be made visible within its
2169  /// semantic context via makeDeclVisibleInContext.
2170  void addDecl(Decl *D);
2171 
2172  /// Add the declaration D into this context, but suppress
2173  /// searches for external declarations with the same name.
2174  ///
2175  /// Although analogous in function to addDecl, this removes an
2176  /// important check. This is only useful if the Decl is being
2177  /// added in response to an external search; in all other cases,
2178  /// addDecl() is the right function to use.
2179  /// See the ASTImporter for use cases.
2180  void addDeclInternal(Decl *D);
2181 
2182  /// Add the declaration D to this context without modifying
2183  /// any lookup tables.
2184  ///
2185  /// This is useful for some operations in dependent contexts where
2186  /// the semantic context might not be dependent; this basically
2187  /// only happens with friends.
2188  void addHiddenDecl(Decl *D);
2189 
2190  /// Removes a declaration from this context.
2191  void removeDecl(Decl *D);
2192 
2193  /// Checks whether a declaration is in this context.
2194  bool containsDecl(Decl *D) const;
2195 
2196  /// Checks whether a declaration is in this context.
2197  /// This also loads the Decls from the external source before the check.
2198  bool containsDeclAndLoad(Decl *D) const;
2199 
2202 
2203  /// lookup - Find the declarations (if any) with the given Name in
2204  /// this context. Returns a range of iterators that contains all of
2205  /// the declarations with this name, with object, function, member,
2206  /// and enumerator names preceding any tag name. Note that this
2207  /// routine will not look into parent contexts.
2208  lookup_result lookup(DeclarationName Name) const;
2209 
2210  /// Find the declarations with the given name that are visible
2211  /// within this context; don't attempt to retrieve anything from an
2212  /// external source.
2213  lookup_result noload_lookup(DeclarationName Name);
2214 
2215  /// A simplistic name lookup mechanism that performs name lookup
2216  /// into this declaration context without consulting the external source.
2217  ///
2218  /// This function should almost never be used, because it subverts the
2219  /// usual relationship between a DeclContext and the external source.
2220  /// See the ASTImporter for the (few, but important) use cases.
2221  ///
2222  /// FIXME: This is very inefficient; replace uses of it with uses of
2223  /// noload_lookup.
2224  void localUncachedLookup(DeclarationName Name,
2225  SmallVectorImpl<NamedDecl *> &Results);
2226 
2227  /// Makes a declaration visible within this context.
2228  ///
2229  /// This routine makes the declaration D visible to name lookup
2230  /// within this context and, if this is a transparent context,
2231  /// within its parent contexts up to the first enclosing
2232  /// non-transparent context. Making a declaration visible within a
2233  /// context does not transfer ownership of a declaration, and a
2234  /// declaration can be visible in many contexts that aren't its
2235  /// lexical context.
2236  ///
2237  /// If D is a redeclaration of an existing declaration that is
2238  /// visible from this context, as determined by
2239  /// NamedDecl::declarationReplaces, the previous declaration will be
2240  /// replaced with D.
2241  void makeDeclVisibleInContext(NamedDecl *D);
2242 
2243  /// all_lookups_iterator - An iterator that provides a view over the results
2244  /// of looking up every possible name.
2245  class all_lookups_iterator;
2246 
2247  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
2248 
2249  lookups_range lookups() const;
2250  // Like lookups(), but avoids loading external declarations.
2251  // If PreserveInternalState, avoids building lookup data structures too.
2252  lookups_range noload_lookups(bool PreserveInternalState) const;
2253 
2254  /// Iterators over all possible lookups within this context.
2255  all_lookups_iterator lookups_begin() const;
2256  all_lookups_iterator lookups_end() const;
2257 
2258  /// Iterators over all possible lookups within this context that are
2259  /// currently loaded; don't attempt to retrieve anything from an external
2260  /// source.
2261  all_lookups_iterator noload_lookups_begin() const;
2262  all_lookups_iterator noload_lookups_end() const;
2263 
2264  struct udir_iterator;
2265 
2266  using udir_iterator_base =
2267  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
2268  std::random_access_iterator_tag,
2270 
2271  struct udir_iterator : udir_iterator_base {
2272  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
2273 
2274  UsingDirectiveDecl *operator*() const;
2275  };
2276 
2277  using udir_range = llvm::iterator_range<udir_iterator>;
2278 
2279  udir_range using_directives() const;
2280 
2281  // These are all defined in DependentDiagnostic.h.
2282  class ddiag_iterator;
2283 
2284  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
2285 
2286  inline ddiag_range ddiags() const;
2287 
2288  // Low-level accessors
2289 
2290  /// Mark that there are external lexical declarations that we need
2291  /// to include in our lookup table (and that are not available as external
2292  /// visible lookups). These extra lookup results will be found by walking
2293  /// the lexical declarations of this context. This should be used only if
2294  /// setHasExternalLexicalStorage() has been called on any decl context for
2295  /// which this is the primary context.
2297  assert(this == getPrimaryContext() &&
2298  "should only be called on primary context");
2299  DeclContextBits.HasLazyExternalLexicalLookups = true;
2300  }
2301 
2302  /// Retrieve the internal representation of the lookup structure.
2303  /// This may omit some names if we are lazily building the structure.
2304  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
2305 
2306  /// Ensure the lookup structure is fully-built and return it.
2307  StoredDeclsMap *buildLookup();
2308 
2309  /// Whether this DeclContext has external storage containing
2310  /// additional declarations that are lexically in this context.
2312  return DeclContextBits.ExternalLexicalStorage;
2313  }
2314 
2315  /// State whether this DeclContext has external storage for
2316  /// declarations lexically in this context.
2317  void setHasExternalLexicalStorage(bool ES = true) const {
2318  DeclContextBits.ExternalLexicalStorage = ES;
2319  }
2320 
2321  /// Whether this DeclContext has external storage containing
2322  /// additional declarations that are visible in this context.
2324  return DeclContextBits.ExternalVisibleStorage;
2325  }
2326 
2327  /// State whether this DeclContext has external storage for
2328  /// declarations visible in this context.
2329  void setHasExternalVisibleStorage(bool ES = true) const {
2330  DeclContextBits.ExternalVisibleStorage = ES;
2331  if (ES && LookupPtr)
2332  DeclContextBits.NeedToReconcileExternalVisibleStorage = true;
2333  }
2334 
2335  /// Determine whether the given declaration is stored in the list of
2336  /// declarations lexically within this context.
2337  bool isDeclInLexicalTraversal(const Decl *D) const {
2338  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
2339  D == LastDecl);
2340  }
2341 
2342  bool setUseQualifiedLookup(bool use = true) const {
2343  bool old_value = DeclContextBits.UseQualifiedLookup;
2344  DeclContextBits.UseQualifiedLookup = use;
2345  return old_value;
2346  }
2347 
2349  return DeclContextBits.UseQualifiedLookup;
2350  }
2351 
2352  static bool classof(const Decl *D);
2353  static bool classof(const DeclContext *D) { return true; }
2354 
2355  void dumpDeclContext() const;
2356  void dumpLookups() const;
2357  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
2358  bool Deserialize = false) const;
2359 
2360 private:
2361  /// Whether this declaration context has had externally visible
2362  /// storage added since the last lookup. In this case, \c LookupPtr's
2363  /// invariant may not hold and needs to be fixed before we perform
2364  /// another lookup.
2365  bool hasNeedToReconcileExternalVisibleStorage() const {
2366  return DeclContextBits.NeedToReconcileExternalVisibleStorage;
2367  }
2368 
2369  /// State that this declaration context has had externally visible
2370  /// storage added since the last lookup. In this case, \c LookupPtr's
2371  /// invariant may not hold and needs to be fixed before we perform
2372  /// another lookup.
2373  void setNeedToReconcileExternalVisibleStorage(bool Need = true) const {
2374  DeclContextBits.NeedToReconcileExternalVisibleStorage = Need;
2375  }
2376 
2377  /// If \c true, this context may have local lexical declarations
2378  /// that are missing from the lookup table.
2379  bool hasLazyLocalLexicalLookups() const {
2380  return DeclContextBits.HasLazyLocalLexicalLookups;
2381  }
2382 
2383  /// If \c true, this context may have local lexical declarations
2384  /// that are missing from the lookup table.
2385  void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const {
2386  DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL;
2387  }
2388 
2389  /// If \c true, the external source may have lexical declarations
2390  /// that are missing from the lookup table.
2391  bool hasLazyExternalLexicalLookups() const {
2392  return DeclContextBits.HasLazyExternalLexicalLookups;
2393  }
2394 
2395  /// If \c true, the external source may have lexical declarations
2396  /// that are missing from the lookup table.
2397  void setHasLazyExternalLexicalLookups(bool HasLELL = true) const {
2398  DeclContextBits.HasLazyExternalLexicalLookups = HasLELL;
2399  }
2400 
2401  void reconcileExternalVisibleStorage() const;
2402  bool LoadLexicalDeclsFromExternalStorage() const;
2403 
2404  /// Makes a declaration visible within this context, but
2405  /// suppresses searches for external declarations with the same
2406  /// name.
2407  ///
2408  /// Analogous to makeDeclVisibleInContext, but for the exclusive
2409  /// use of addDeclInternal().
2410  void makeDeclVisibleInContextInternal(NamedDecl *D);
2411 
2412  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
2413 
2414  void loadLazyLocalLexicalLookups();
2415  void buildLookupImpl(DeclContext *DCtx, bool Internal);
2416  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
2417  bool Rediscoverable);
2418  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
2419 };
2420 
2421 inline bool Decl::isTemplateParameter() const {
2422  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
2423  getKind() == TemplateTemplateParm;
2424 }
2425 
2426 // Specialization selected when ToTy is not a known subclass of DeclContext.
2427 template <class ToTy,
2428  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
2430  static const ToTy *doit(const DeclContext *Val) {
2431  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
2432  }
2433 
2434  static ToTy *doit(DeclContext *Val) {
2435  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
2436  }
2437 };
2438 
2439 // Specialization selected when ToTy is a known subclass of DeclContext.
2440 template <class ToTy>
2442  static const ToTy *doit(const DeclContext *Val) {
2443  return static_cast<const ToTy*>(Val);
2444  }
2445 
2446  static ToTy *doit(DeclContext *Val) {
2447  return static_cast<ToTy*>(Val);
2448  }
2449 };
2450 
2451 } // namespace clang
2452 
2453 namespace llvm {
2454 
2455 /// isa<T>(DeclContext*)
2456 template <typename To>
2457 struct isa_impl<To, ::clang::DeclContext> {
2458  static bool doit(const ::clang::DeclContext &Val) {
2459  return To::classofKind(Val.getDeclKind());
2460  }
2461 };
2462 
2463 /// cast<T>(DeclContext*)
2464 template<class ToTy>
2465 struct cast_convert_val<ToTy,
2466  const ::clang::DeclContext,const ::clang::DeclContext> {
2467  static const ToTy &doit(const ::clang::DeclContext &Val) {
2469  }
2470 };
2471 
2472 template<class ToTy>
2473 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2474  static ToTy &doit(::clang::DeclContext &Val) {
2476  }
2477 };
2478 
2479 template<class ToTy>
2480 struct cast_convert_val<ToTy,
2481  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2482  static const ToTy *doit(const ::clang::DeclContext *Val) {
2483  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2484  }
2485 };
2486 
2487 template<class ToTy>
2488 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2489  static ToTy *doit(::clang::DeclContext *Val) {
2490  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2491  }
2492 };
2493 
2494 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2495 template<class FromTy>
2496 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2497  static ::clang::DeclContext &doit(const FromTy &Val) {
2498  return *FromTy::castToDeclContext(&Val);
2499  }
2500 };
2501 
2502 template<class FromTy>
2503 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2504  static ::clang::DeclContext *doit(const FromTy *Val) {
2505  return FromTy::castToDeclContext(Val);
2506  }
2507 };
2508 
2509 template<class FromTy>
2510 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2511  static const ::clang::DeclContext &doit(const FromTy &Val) {
2512  return *FromTy::castToDeclContext(&Val);
2513  }
2514 };
2515 
2516 template<class FromTy>
2517 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2518  static const ::clang::DeclContext *doit(const FromTy *Val) {
2519  return FromTy::castToDeclContext(Val);
2520  }
2521 };
2522 
2523 } // namespace llvm
2524 
2525 #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:957
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:2348
specific_decl_iterator & operator++()
Definition: DeclBase.h:2059
void setImplicit(bool I=true)
Definition: DeclBase.h:548
Represents a function declaration or definition.
Definition: Decl.h:1732
redecl_iterator operator++(int)
Definition: DeclBase.h:922
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:871
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:2007
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:937
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:887
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:752
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:240
__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:868
bool isClosure() const
Definition: DeclBase.h:1784
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:1812
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:979
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:475
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:1481
attr_iterator attr_begin() const
Definition: DeclBase.h:494
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:518
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3351
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:331
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
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:2071
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:2050
static void add(Kind k)
Definition: DeclBase.cpp:193
Not a friend object.
Definition: DeclBase.h:1094
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:953
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2458
bool isObjCContainer() const
Definition: DeclBase.h:1786
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:414
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:2337
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2434
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:2323
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:2092
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:792
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2478
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:321
redecl_iterator & operator++()
Definition: DeclBase.h:913
reference back() const
Definition: DeclBase.h:1234
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:214
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:747
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:1996
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:119
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
reference front() const
Definition: DeclBase.h:1233
bool isInvalidDecl() const
Definition: DeclBase.h:542
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2076
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
BlockDeclBitfields BlockDeclBits
Definition: DeclBase.h:1697
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:731
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:378
value_type operator->() const
Definition: DeclBase.h:1970
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:131
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:3585
CXXConstructorDeclBitfields CXXConstructorDeclBits
Definition: DeclBase.h:1693
void dumpColor() const
Definition: ASTDumper.cpp:2779
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 setHasExternalLexicalStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:2317
void print(raw_ostream &Out, unsigned Indentation=0, bool PrintInstantiation=false) const
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:347
LinkageSpecDeclBitfields LinkageSpecDeclBits
Definition: DeclBase.h:1696
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1186
attr_iterator attr_end() const
Definition: DeclBase.h:497
specific_decl_iterator operator++(int)
Definition: DeclBase.h:2065
friend class DeclContext
Definition: DeclBase.h:243
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1992
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:904
This declaration is a friend function.
Definition: DeclBase.h:153
bool isNamespace() const
Definition: DeclBase.h:1831
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:773
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:406
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:623
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:848
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:796
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1871
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:324
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:523
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:664
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2152
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1215
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:961
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:141
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:802
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:826
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:779
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1961
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:2128
static bool isStdNamespace(const DeclContext *DC)
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1096
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2038
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1238
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:2296
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1157
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:821
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2037
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:118
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:739
Represents a linkage specification.
Definition: DeclCXX.h:2820
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2504
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:891
Ordinary names.
Definition: DeclBase.h:145
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:396
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:73
NodeId Parent
Definition: ASTDiff.cpp:192
Decl * getNextDeclInContext()
Definition: DeclBase.h:424
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:531
DeclContextBitfields DeclContextBits
Definition: DeclBase.h:1687
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:103
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:169
Objective C @protocol.
Definition: DeclBase.h:148
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2277
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2004
std::ptrdiff_t difference_type
Definition: DeclBase.h:905
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1776
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:964
This declaration is a friend class.
Definition: DeclBase.h:158
const Decl * getNonClosureContext() const
Definition: DeclBase.h:442
int64_t getID() const
Definition: DeclBase.cpp:957
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1767
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:876
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3850
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:2247
static bool classofKind(Kind K)
Definition: DeclBase.h:1119
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:704
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:2304
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:179
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:547
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:722
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:968
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1199
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:425
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1053
bool isFileContext() const
Definition: DeclBase.h:1817
DeclContext * getDeclContext()
Definition: DeclBase.h:427
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:949
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2421
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:614
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:488
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
const DeclContext * getParent() const
Definition: DeclBase.h:1754
bool isFunctionOrMethod() const
Definition: DeclBase.h:1799
reference operator[](size_t N) const
Definition: DeclBase.h:1235
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:1751
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:419
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1025
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1988
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:327
const SourceManager & SM
Definition: Format.cpp:1490
FunctionDeclBitfields FunctionDeclBits
Definition: DeclBase.h:1692
const DeclContext * getDeclContext() const
Definition: DeclBase.h:432
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
reference operator*() const
Definition: DeclBase.h:910
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1103
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:806
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2329
AttrVec & getAttrs()
Definition: DeclBase.h:479
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:985
bool hasAttrs() const
Definition: DeclBase.h:473
filtered_decl_iterator & operator++()
Definition: DeclBase.h:2135
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2518
iterator::reference reference
Definition: DeclBase.h:1225
Abstract interface for external sources of AST nodes.
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:226
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1744
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:895
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:586
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:137
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:784
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:103
The nullability qualifier is set when the nullability of the result or parameter was expressed via a ...
Definition: DeclBase.h:208
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3056
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
void setReferenced(bool R=true)
Definition: DeclBase.h:577
static bool classof(const DeclContext *D)
Definition: DeclBase.h:2353
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2116
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:2272
bool hasCachedLinkage() const
Definition: DeclBase.h:400
A friend of a previously-declared entity.
Definition: DeclBase.h:1095
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1201
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:2311
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2497
Linkage getCachedLinkage() const
Definition: DeclBase.h:392
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:695
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:928
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:2284
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:883
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2446
decl_iterator noload_decls_end() const
Definition: DeclBase.h:2008
void dropAttrs()
Definition: DeclBase.cpp:833
__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:1953
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:575
redecl_iterator redecls_begin() const
Definition: DeclBase.h:945
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:941
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2430
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:1261
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:582
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:972
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1011
bool isRecord() const
Definition: DeclBase.h:1826
attr_range attrs() const
Definition: DeclBase.h:490
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:932
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:355
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:487
AccessSpecifier getAccess() const
Definition: DeclBase.h:462
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:116
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:421
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:1002
decl_iterator operator++(int)
Definition: DeclBase.h:1977
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1883
Represents an enum.
Definition: Decl.h:3318
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:126
EnumDeclBitfields EnumDeclBits
Definition: DeclBase.h:1689
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:767
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:2016
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:1064
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:1035
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1914
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:562
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:1112
T * getAttr() const
Definition: DeclBase.h:527
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:707
virtual ~Decl()
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:2141
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1770
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:699
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1224
ObjCMethodDeclBitfields ObjCMethodDeclBits
Definition: DeclBase.h:1694
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:513
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2511
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:962
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2147
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:196
decl_iterator & operator++()
Definition: DeclBase.h:1972
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1176
bool setUseQualifiedLookup(bool use=true) const
Definition: DeclBase.h:2342
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1908
value_type operator->() const
Definition: DeclBase.h:911
RecordDeclBitfields RecordDeclBits
Definition: DeclBase.h:1690
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1894
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:368
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:887
void addAttr(Attr *A)
Definition: DeclBase.cpp:840
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:104
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2442
friend class CXXClassMemberWrapper
Definition: DeclBase.h:315
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1780
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:90
void dump() const
Definition: ASTDumper.cpp:2768
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:176
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1161
static void EnableStatistics()
Definition: DeclBase.cpp:165
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1983
ObjCContainerDeclBitfields ObjCContainerDeclBits
Definition: DeclBase.h:1695
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:469
#define true
Definition: stdbool.h:32
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:596
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits
Definition: DeclBase.h:1691
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1822
void dropAttr()
Definition: DeclBase.h:502
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:457
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:447
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:2910
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:906
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:418
TagDeclBitfields TagDeclBits
Definition: DeclBase.h:1688
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1987
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1902
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:673
decl_iterator decls_end() const
Definition: DeclBase.h:1998
This declaration is a using declaration.
Definition: DeclBase.h:164
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2115
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:864
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1169