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DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the Decl and DeclContext interfaces.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_AST_DECLBASE_H
14 #define LLVM_CLANG_AST_DECLBASE_H
15 
16 #include "clang/AST/AttrIterator.h"
19 #include "clang/Basic/LLVM.h"
21 #include "clang/Basic/Specifiers.h"
22 #include "llvm/ADT/ArrayRef.h"
23 #include "llvm/ADT/PointerIntPair.h"
24 #include "llvm/ADT/PointerUnion.h"
25 #include "llvm/ADT/iterator.h"
26 #include "llvm/ADT/iterator_range.h"
27 #include "llvm/Support/Casting.h"
28 #include "llvm/Support/Compiler.h"
29 #include "llvm/Support/PrettyStackTrace.h"
30 #include "llvm/Support/VersionTuple.h"
31 #include <algorithm>
32 #include <cassert>
33 #include <cstddef>
34 #include <iterator>
35 #include <string>
36 #include <type_traits>
37 #include <utility>
38 
39 namespace clang {
40 
41 class ASTContext;
42 class ASTMutationListener;
43 class Attr;
44 class DeclContext;
45 class ExternalSourceSymbolAttr;
46 class FunctionDecl;
47 class FunctionType;
48 class IdentifierInfo;
49 enum Linkage : unsigned char;
50 class LinkageSpecDecl;
51 class Module;
52 class NamedDecl;
53 class ObjCCategoryDecl;
54 class ObjCCategoryImplDecl;
55 class ObjCContainerDecl;
56 class ObjCImplDecl;
57 class ObjCImplementationDecl;
58 class ObjCInterfaceDecl;
59 class ObjCMethodDecl;
60 class ObjCProtocolDecl;
61 struct PrintingPolicy;
62 class RecordDecl;
63 class SourceManager;
64 class Stmt;
65 class StoredDeclsMap;
66 class TemplateDecl;
67 class TranslationUnitDecl;
68 class UsingDirectiveDecl;
69 
70 /// Captures the result of checking the availability of a
71 /// declaration.
77 };
78 
79 /// Decl - This represents one declaration (or definition), e.g. a variable,
80 /// typedef, function, struct, etc.
81 ///
82 /// Note: There are objects tacked on before the *beginning* of Decl
83 /// (and its subclasses) in its Decl::operator new(). Proper alignment
84 /// of all subclasses (not requiring more than the alignment of Decl) is
85 /// asserted in DeclBase.cpp.
86 class alignas(8) Decl {
87 public:
88  /// Lists the kind of concrete classes of Decl.
89  enum Kind {
90 #define DECL(DERIVED, BASE) DERIVED,
91 #define ABSTRACT_DECL(DECL)
92 #define DECL_RANGE(BASE, START, END) \
93  first##BASE = START, last##BASE = END,
94 #define LAST_DECL_RANGE(BASE, START, END) \
95  first##BASE = START, last##BASE = END
96 #include "clang/AST/DeclNodes.inc"
97  };
98 
99  /// A placeholder type used to construct an empty shell of a
100  /// decl-derived type that will be filled in later (e.g., by some
101  /// deserialization method).
102  struct EmptyShell {};
103 
104  /// IdentifierNamespace - The different namespaces in which
105  /// declarations may appear. According to C99 6.2.3, there are
106  /// four namespaces, labels, tags, members and ordinary
107  /// identifiers. C++ describes lookup completely differently:
108  /// certain lookups merely "ignore" certain kinds of declarations,
109  /// usually based on whether the declaration is of a type, etc.
110  ///
111  /// These are meant as bitmasks, so that searches in
112  /// C++ can look into the "tag" namespace during ordinary lookup.
113  ///
114  /// Decl currently provides 15 bits of IDNS bits.
116  /// Labels, declared with 'x:' and referenced with 'goto x'.
117  IDNS_Label = 0x0001,
118 
119  /// Tags, declared with 'struct foo;' and referenced with
120  /// 'struct foo'. All tags are also types. This is what
121  /// elaborated-type-specifiers look for in C.
122  /// This also contains names that conflict with tags in the
123  /// same scope but that are otherwise ordinary names (non-type
124  /// template parameters and indirect field declarations).
125  IDNS_Tag = 0x0002,
126 
127  /// Types, declared with 'struct foo', typedefs, etc.
128  /// This is what elaborated-type-specifiers look for in C++,
129  /// but note that it's ill-formed to find a non-tag.
130  IDNS_Type = 0x0004,
131 
132  /// Members, declared with object declarations within tag
133  /// definitions. In C, these can only be found by "qualified"
134  /// lookup in member expressions. In C++, they're found by
135  /// normal lookup.
136  IDNS_Member = 0x0008,
137 
138  /// Namespaces, declared with 'namespace foo {}'.
139  /// Lookup for nested-name-specifiers find these.
140  IDNS_Namespace = 0x0010,
141 
142  /// Ordinary names. In C, everything that's not a label, tag,
143  /// member, or function-local extern ends up here.
144  IDNS_Ordinary = 0x0020,
145 
146  /// Objective C \@protocol.
148 
149  /// This declaration is a friend function. A friend function
150  /// declaration is always in this namespace but may also be in
151  /// IDNS_Ordinary if it was previously declared.
153 
154  /// This declaration is a friend class. A friend class
155  /// declaration is always in this namespace but may also be in
156  /// IDNS_Tag|IDNS_Type if it was previously declared.
157  IDNS_TagFriend = 0x0100,
158 
159  /// This declaration is a using declaration. A using declaration
160  /// *introduces* a number of other declarations into the current
161  /// scope, and those declarations use the IDNS of their targets,
162  /// but the actual using declarations go in this namespace.
163  IDNS_Using = 0x0200,
164 
165  /// This declaration is a C++ operator declared in a non-class
166  /// context. All such operators are also in IDNS_Ordinary.
167  /// C++ lexical operator lookup looks for these.
169 
170  /// This declaration is a function-local extern declaration of a
171  /// variable or function. This may also be IDNS_Ordinary if it
172  /// has been declared outside any function. These act mostly like
173  /// invisible friend declarations, but are also visible to unqualified
174  /// lookup within the scope of the declaring function.
176 
177  /// This declaration is an OpenMP user defined reduction construction.
179 
180  /// This declaration is an OpenMP user defined mapper.
181  IDNS_OMPMapper = 0x2000,
182  };
183 
184  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
185  /// parameter types in method declarations. Other than remembering
186  /// them and mangling them into the method's signature string, these
187  /// are ignored by the compiler; they are consumed by certain
188  /// remote-messaging frameworks.
189  ///
190  /// in, inout, and out are mutually exclusive and apply only to
191  /// method parameters. bycopy and byref are mutually exclusive and
192  /// apply only to method parameters (?). oneway applies only to
193  /// results. All of these expect their corresponding parameter to
194  /// have a particular type. None of this is currently enforced by
195  /// clang.
196  ///
197  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
200  OBJC_TQ_In = 0x1,
202  OBJC_TQ_Out = 0x4,
206 
207  /// The nullability qualifier is set when the nullability of the
208  /// result or parameter was expressed via a context-sensitive
209  /// keyword.
211  };
212 
213  /// The kind of ownership a declaration has, for visibility purposes.
214  /// This enumeration is designed such that higher values represent higher
215  /// levels of name hiding.
216  enum class ModuleOwnershipKind : unsigned {
217  /// This declaration is not owned by a module.
218  Unowned,
219 
220  /// This declaration has an owning module, but is globally visible
221  /// (typically because its owning module is visible and we know that
222  /// modules cannot later become hidden in this compilation).
223  /// After serialization and deserialization, this will be converted
224  /// to VisibleWhenImported.
225  Visible,
226 
227  /// This declaration has an owning module, and is visible when that
228  /// module is imported.
229  VisibleWhenImported,
230 
231  /// This declaration has an owning module, but is only visible to
232  /// lookups that occur within that module.
233  ModulePrivate
234  };
235 
236 protected:
237  /// The next declaration within the same lexical
238  /// DeclContext. These pointers form the linked list that is
239  /// traversed via DeclContext's decls_begin()/decls_end().
240  ///
241  /// The extra two bits are used for the ModuleOwnershipKind.
242  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
243 
244 private:
245  friend class DeclContext;
246 
247  struct MultipleDC {
248  DeclContext *SemanticDC;
249  DeclContext *LexicalDC;
250  };
251 
252  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
253  /// For declarations that don't contain C++ scope specifiers, it contains
254  /// the DeclContext where the Decl was declared.
255  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
256  /// with the context where it semantically belongs (SemanticDC) and the
257  /// context where it was lexically declared (LexicalDC).
258  /// e.g.:
259  ///
260  /// namespace A {
261  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
262  /// }
263  /// void A::f(); // SemanticDC == namespace 'A'
264  /// // LexicalDC == global namespace
265  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
266 
267  bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
268  bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
269 
270  MultipleDC *getMultipleDC() const {
271  return DeclCtx.get<MultipleDC*>();
272  }
273 
274  DeclContext *getSemanticDC() const {
275  return DeclCtx.get<DeclContext*>();
276  }
277 
278  /// Loc - The location of this decl.
279  SourceLocation Loc;
280 
281  /// DeclKind - This indicates which class this is.
282  unsigned DeclKind : 7;
283 
284  /// InvalidDecl - This indicates a semantic error occurred.
285  unsigned InvalidDecl : 1;
286 
287  /// HasAttrs - This indicates whether the decl has attributes or not.
288  unsigned HasAttrs : 1;
289 
290  /// Implicit - Whether this declaration was implicitly generated by
291  /// the implementation rather than explicitly written by the user.
292  unsigned Implicit : 1;
293 
294  /// Whether this declaration was "used", meaning that a definition is
295  /// required.
296  unsigned Used : 1;
297 
298  /// Whether this declaration was "referenced".
299  /// The difference with 'Used' is whether the reference appears in a
300  /// evaluated context or not, e.g. functions used in uninstantiated templates
301  /// are regarded as "referenced" but not "used".
302  unsigned Referenced : 1;
303 
304  /// Whether this declaration is a top-level declaration (function,
305  /// global variable, etc.) that is lexically inside an objc container
306  /// definition.
307  unsigned TopLevelDeclInObjCContainer : 1;
308 
309  /// Whether statistic collection is enabled.
310  static bool StatisticsEnabled;
311 
312 protected:
313  friend class ASTDeclReader;
314  friend class ASTDeclWriter;
315  friend class ASTNodeImporter;
316  friend class ASTReader;
317  friend class CXXClassMemberWrapper;
318  friend class LinkageComputer;
319  template<typename decl_type> friend class Redeclarable;
320 
321  /// Access - Used by C++ decls for the access specifier.
322  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
323  unsigned Access : 2;
324 
325  /// Whether this declaration was loaded from an AST file.
326  unsigned FromASTFile : 1;
327 
328  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
329  unsigned IdentifierNamespace : 14;
330 
331  /// If 0, we have not computed the linkage of this declaration.
332  /// Otherwise, it is the linkage + 1.
333  mutable unsigned CacheValidAndLinkage : 3;
334 
335  /// Allocate memory for a deserialized declaration.
336  ///
337  /// This routine must be used to allocate memory for any declaration that is
338  /// deserialized from a module file.
339  ///
340  /// \param Size The size of the allocated object.
341  /// \param Ctx The context in which we will allocate memory.
342  /// \param ID The global ID of the deserialized declaration.
343  /// \param Extra The amount of extra space to allocate after the object.
344  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
345  std::size_t Extra = 0);
346 
347  /// Allocate memory for a non-deserialized declaration.
348  void *operator new(std::size_t Size, const ASTContext &Ctx,
349  DeclContext *Parent, std::size_t Extra = 0);
350 
351 private:
352  bool AccessDeclContextSanity() const;
353 
354  /// Get the module ownership kind to use for a local lexical child of \p DC,
355  /// which may be either a local or (rarely) an imported declaration.
356  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
357  if (DC) {
358  auto *D = cast<Decl>(DC);
359  auto MOK = D->getModuleOwnershipKind();
360  if (MOK != ModuleOwnershipKind::Unowned &&
361  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
362  return MOK;
363  // If D is not local and we have no local module storage, then we don't
364  // need to track module ownership at all.
365  }
367  }
368 
369 protected:
371  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
372  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false),
373  Implicit(false), Used(false), Referenced(false),
374  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
377  if (StatisticsEnabled) add(DK);
378  }
379 
380  Decl(Kind DK, EmptyShell Empty)
381  : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
382  Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
386  if (StatisticsEnabled) add(DK);
387  }
388 
389  virtual ~Decl();
390 
391  /// Update a potentially out-of-date declaration.
392  void updateOutOfDate(IdentifierInfo &II) const;
393 
395  return Linkage(CacheValidAndLinkage - 1);
396  }
397 
398  void setCachedLinkage(Linkage L) const {
399  CacheValidAndLinkage = L + 1;
400  }
401 
402  bool hasCachedLinkage() const {
403  return CacheValidAndLinkage;
404  }
405 
406 public:
407  /// Source range that this declaration covers.
408  virtual SourceRange getSourceRange() const LLVM_READONLY {
409  return SourceRange(getLocation(), getLocation());
410  }
411 
412  SourceLocation getBeginLoc() const LLVM_READONLY {
413  return getSourceRange().getBegin();
414  }
415 
416  SourceLocation getEndLoc() const LLVM_READONLY {
417  return getSourceRange().getEnd();
418  }
419 
420  SourceLocation getLocation() const { return Loc; }
421  void setLocation(SourceLocation L) { Loc = L; }
422 
423  Kind getKind() const { return static_cast<Kind>(DeclKind); }
424  const char *getDeclKindName() const;
425 
426  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
427  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
428 
430  if (isInSemaDC())
431  return getSemanticDC();
432  return getMultipleDC()->SemanticDC;
433  }
434  const DeclContext *getDeclContext() const {
435  return const_cast<Decl*>(this)->getDeclContext();
436  }
437 
438  /// Find the innermost non-closure ancestor of this declaration,
439  /// walking up through blocks, lambdas, etc. If that ancestor is
440  /// not a code context (!isFunctionOrMethod()), returns null.
441  ///
442  /// A declaration may be its own non-closure context.
444  const Decl *getNonClosureContext() const {
445  return const_cast<Decl*>(this)->getNonClosureContext();
446  }
447 
450  return const_cast<Decl*>(this)->getTranslationUnitDecl();
451  }
452 
453  bool isInAnonymousNamespace() const;
454 
455  bool isInStdNamespace() const;
456 
457  ASTContext &getASTContext() const LLVM_READONLY;
458 
460  Access = AS;
461  assert(AccessDeclContextSanity());
462  }
463 
465  assert(AccessDeclContextSanity());
466  return AccessSpecifier(Access);
467  }
468 
469  /// Retrieve the access specifier for this declaration, even though
470  /// it may not yet have been properly set.
472  return AccessSpecifier(Access);
473  }
474 
475  bool hasAttrs() const { return HasAttrs; }
476 
477  void setAttrs(const AttrVec& Attrs) {
478  return setAttrsImpl(Attrs, getASTContext());
479  }
480 
482  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
483  }
484 
485  const AttrVec &getAttrs() const;
486  void dropAttrs();
487  void addAttr(Attr *A);
488 
489  using attr_iterator = AttrVec::const_iterator;
490  using attr_range = llvm::iterator_range<attr_iterator>;
491 
492  attr_range attrs() const {
493  return attr_range(attr_begin(), attr_end());
494  }
495 
497  return hasAttrs() ? getAttrs().begin() : nullptr;
498  }
500  return hasAttrs() ? getAttrs().end() : nullptr;
501  }
502 
503  template <typename T>
504  void dropAttr() {
505  if (!HasAttrs) return;
506 
507  AttrVec &Vec = getAttrs();
508  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
509 
510  if (Vec.empty())
511  HasAttrs = false;
512  }
513 
514  template <typename T>
515  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
516  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
517  }
518 
519  template <typename T>
522  }
523 
524  template <typename T>
527  }
528 
529  template<typename T> T *getAttr() const {
530  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
531  }
532 
533  template<typename T> bool hasAttr() const {
534  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
535  }
536 
537  /// getMaxAlignment - return the maximum alignment specified by attributes
538  /// on this decl, 0 if there are none.
539  unsigned getMaxAlignment() const;
540 
541  /// setInvalidDecl - Indicates the Decl had a semantic error. This
542  /// allows for graceful error recovery.
543  void setInvalidDecl(bool Invalid = true);
544  bool isInvalidDecl() const { return (bool) InvalidDecl; }
545 
546  /// isImplicit - Indicates whether the declaration was implicitly
547  /// generated by the implementation. If false, this declaration
548  /// was written explicitly in the source code.
549  bool isImplicit() const { return Implicit; }
550  void setImplicit(bool I = true) { Implicit = I; }
551 
552  /// Whether *any* (re-)declaration of the entity was used, meaning that
553  /// a definition is required.
554  ///
555  /// \param CheckUsedAttr When true, also consider the "used" attribute
556  /// (in addition to the "used" bit set by \c setUsed()) when determining
557  /// whether the function is used.
558  bool isUsed(bool CheckUsedAttr = true) const;
559 
560  /// Set whether the declaration is used, in the sense of odr-use.
561  ///
562  /// This should only be used immediately after creating a declaration.
563  /// It intentionally doesn't notify any listeners.
564  void setIsUsed() { getCanonicalDecl()->Used = true; }
565 
566  /// Mark the declaration used, in the sense of odr-use.
567  ///
568  /// This notifies any mutation listeners in addition to setting a bit
569  /// indicating the declaration is used.
570  void markUsed(ASTContext &C);
571 
572  /// Whether any declaration of this entity was referenced.
573  bool isReferenced() const;
574 
575  /// Whether this declaration was referenced. This should not be relied
576  /// upon for anything other than debugging.
577  bool isThisDeclarationReferenced() const { return Referenced; }
578 
579  void setReferenced(bool R = true) { Referenced = R; }
580 
581  /// Whether this declaration is a top-level declaration (function,
582  /// global variable, etc.) that is lexically inside an objc container
583  /// definition.
585  return TopLevelDeclInObjCContainer;
586  }
587 
588  void setTopLevelDeclInObjCContainer(bool V = true) {
589  TopLevelDeclInObjCContainer = V;
590  }
591 
592  /// Looks on this and related declarations for an applicable
593  /// external source symbol attribute.
594  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
595 
596  /// Whether this declaration was marked as being private to the
597  /// module in which it was defined.
598  bool isModulePrivate() const {
600  }
601 
602  /// Whether this declaration is exported (by virtue of being lexically
603  /// within an ExportDecl or by being a NamespaceDecl).
604  bool isExported() const;
605 
606  /// Return true if this declaration has an attribute which acts as
607  /// definition of the entity, such as 'alias' or 'ifunc'.
608  bool hasDefiningAttr() const;
609 
610  /// Return this declaration's defining attribute if it has one.
611  const Attr *getDefiningAttr() const;
612 
613 protected:
614  /// Specify that this declaration was marked as being private
615  /// to the module in which it was defined.
617  // The module-private specifier has no effect on unowned declarations.
618  // FIXME: We should track this in some way for source fidelity.
620  return;
622  }
623 
624  /// Set the owning module ID.
625  void setOwningModuleID(unsigned ID) {
626  assert(isFromASTFile() && "Only works on a deserialized declaration");
627  *((unsigned*)this - 2) = ID;
628  }
629 
630 public:
631  /// Determine the availability of the given declaration.
632  ///
633  /// This routine will determine the most restrictive availability of
634  /// the given declaration (e.g., preferring 'unavailable' to
635  /// 'deprecated').
636  ///
637  /// \param Message If non-NULL and the result is not \c
638  /// AR_Available, will be set to a (possibly empty) message
639  /// describing why the declaration has not been introduced, is
640  /// deprecated, or is unavailable.
641  ///
642  /// \param EnclosingVersion The version to compare with. If empty, assume the
643  /// deployment target version.
644  ///
645  /// \param RealizedPlatform If non-NULL and the availability result is found
646  /// in an available attribute it will set to the platform which is written in
647  /// the available attribute.
649  getAvailability(std::string *Message = nullptr,
650  VersionTuple EnclosingVersion = VersionTuple(),
651  StringRef *RealizedPlatform = nullptr) const;
652 
653  /// Retrieve the version of the target platform in which this
654  /// declaration was introduced.
655  ///
656  /// \returns An empty version tuple if this declaration has no 'introduced'
657  /// availability attributes, or the version tuple that's specified in the
658  /// attribute otherwise.
659  VersionTuple getVersionIntroduced() const;
660 
661  /// Determine whether this declaration is marked 'deprecated'.
662  ///
663  /// \param Message If non-NULL and the declaration is deprecated,
664  /// this will be set to the message describing why the declaration
665  /// was deprecated (which may be empty).
666  bool isDeprecated(std::string *Message = nullptr) const {
667  return getAvailability(Message) == AR_Deprecated;
668  }
669 
670  /// Determine whether this declaration is marked 'unavailable'.
671  ///
672  /// \param Message If non-NULL and the declaration is unavailable,
673  /// this will be set to the message describing why the declaration
674  /// was made unavailable (which may be empty).
675  bool isUnavailable(std::string *Message = nullptr) const {
676  return getAvailability(Message) == AR_Unavailable;
677  }
678 
679  /// Determine whether this is a weak-imported symbol.
680  ///
681  /// Weak-imported symbols are typically marked with the
682  /// 'weak_import' attribute, but may also be marked with an
683  /// 'availability' attribute where we're targing a platform prior to
684  /// the introduction of this feature.
685  bool isWeakImported() const;
686 
687  /// Determines whether this symbol can be weak-imported,
688  /// e.g., whether it would be well-formed to add the weak_import
689  /// attribute.
690  ///
691  /// \param IsDefinition Set to \c true to indicate that this
692  /// declaration cannot be weak-imported because it has a definition.
693  bool canBeWeakImported(bool &IsDefinition) const;
694 
695  /// Determine whether this declaration came from an AST file (such as
696  /// a precompiled header or module) rather than having been parsed.
697  bool isFromASTFile() const { return FromASTFile; }
698 
699  /// Retrieve the global declaration ID associated with this
700  /// declaration, which specifies where this Decl was loaded from.
701  unsigned getGlobalID() const {
702  if (isFromASTFile())
703  return *((const unsigned*)this - 1);
704  return 0;
705  }
706 
707  /// Retrieve the global ID of the module that owns this particular
708  /// declaration.
709  unsigned getOwningModuleID() const {
710  if (isFromASTFile())
711  return *((const unsigned*)this - 2);
712  return 0;
713  }
714 
715 private:
716  Module *getOwningModuleSlow() const;
717 
718 protected:
719  bool hasLocalOwningModuleStorage() const;
720 
721 public:
722  /// Get the imported owning module, if this decl is from an imported
723  /// (non-local) module.
725  if (!isFromASTFile() || !hasOwningModule())
726  return nullptr;
727 
728  return getOwningModuleSlow();
729  }
730 
731  /// Get the local owning module, if known. Returns nullptr if owner is
732  /// not yet known or declaration is not from a module.
734  if (isFromASTFile() || !hasOwningModule())
735  return nullptr;
736 
737  assert(hasLocalOwningModuleStorage() &&
738  "owned local decl but no local module storage");
739  return reinterpret_cast<Module *const *>(this)[-1];
740  }
742  assert(!isFromASTFile() && hasOwningModule() &&
744  "should not have a cached owning module");
745  reinterpret_cast<Module **>(this)[-1] = M;
746  }
747 
748  /// Is this declaration owned by some module?
749  bool hasOwningModule() const {
751  }
752 
753  /// Get the module that owns this declaration (for visibility purposes).
756  }
757 
758  /// Get the module that owns this declaration for linkage purposes.
759  /// There only ever is such a module under the C++ Modules TS.
760  ///
761  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
762  /// all declarations in a global module fragment are unowned.
763  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
764 
765  /// Determine whether this declaration might be hidden from name
766  /// lookup. Note that the declaration might be visible even if this returns
767  /// \c false, if the owning module is visible within the query context.
768  // FIXME: Rename this to make it clearer what it does.
769  bool isHidden() const {
771  }
772 
773  /// Set that this declaration is globally visible, even if it came from a
774  /// module that is not visible.
776  if (isHidden())
778  }
779 
780  /// Get the kind of module ownership for this declaration.
782  return NextInContextAndBits.getInt();
783  }
784 
785  /// Set whether this declaration is hidden from name lookup.
790  "no storage available for owning module for this declaration");
791  NextInContextAndBits.setInt(MOK);
792  }
793 
794  unsigned getIdentifierNamespace() const {
795  return IdentifierNamespace;
796  }
797 
798  bool isInIdentifierNamespace(unsigned NS) const {
799  return getIdentifierNamespace() & NS;
800  }
801 
802  static unsigned getIdentifierNamespaceForKind(Kind DK);
803 
806  }
807 
808  static bool isTagIdentifierNamespace(unsigned NS) {
809  // TagDecls have Tag and Type set and may also have TagFriend.
810  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
811  }
812 
813  /// getLexicalDeclContext - The declaration context where this Decl was
814  /// lexically declared (LexicalDC). May be different from
815  /// getDeclContext() (SemanticDC).
816  /// e.g.:
817  ///
818  /// namespace A {
819  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
820  /// }
821  /// void A::f(); // SemanticDC == namespace 'A'
822  /// // LexicalDC == global namespace
824  if (isInSemaDC())
825  return getSemanticDC();
826  return getMultipleDC()->LexicalDC;
827  }
829  return const_cast<Decl*>(this)->getLexicalDeclContext();
830  }
831 
832  /// Determine whether this declaration is declared out of line (outside its
833  /// semantic context).
834  virtual bool isOutOfLine() const;
835 
836  /// setDeclContext - Set both the semantic and lexical DeclContext
837  /// to DC.
838  void setDeclContext(DeclContext *DC);
839 
841 
842  /// Determine whether this declaration is a templated entity (whether it is
843  // within the scope of a template parameter).
844  bool isTemplated() const;
845 
846  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
847  /// scoped decl is defined outside the current function or method. This is
848  /// roughly global variables and functions, but also handles enums (which
849  /// could be defined inside or outside a function etc).
851  return getParentFunctionOrMethod() == nullptr;
852  }
853 
854  /// Returns true if this declaration lexically is inside a function.
855  /// It recognizes non-defining declarations as well as members of local
856  /// classes:
857  /// \code
858  /// void foo() { void bar(); }
859  /// void foo2() { class ABC { void bar(); }; }
860  /// \endcode
862 
863  /// If this decl is defined inside a function/method/block it returns
864  /// the corresponding DeclContext, otherwise it returns null.
865  const DeclContext *getParentFunctionOrMethod() const;
867  return const_cast<DeclContext*>(
868  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
869  }
870 
871  /// Retrieves the "canonical" declaration of the given declaration.
872  virtual Decl *getCanonicalDecl() { return this; }
873  const Decl *getCanonicalDecl() const {
874  return const_cast<Decl*>(this)->getCanonicalDecl();
875  }
876 
877  /// Whether this particular Decl is a canonical one.
878  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
879 
880 protected:
881  /// Returns the next redeclaration or itself if this is the only decl.
882  ///
883  /// Decl subclasses that can be redeclared should override this method so that
884  /// Decl::redecl_iterator can iterate over them.
885  virtual Decl *getNextRedeclarationImpl() { return this; }
886 
887  /// Implementation of getPreviousDecl(), to be overridden by any
888  /// subclass that has a redeclaration chain.
889  virtual Decl *getPreviousDeclImpl() { return nullptr; }
890 
891  /// Implementation of getMostRecentDecl(), to be overridden by any
892  /// subclass that has a redeclaration chain.
893  virtual Decl *getMostRecentDeclImpl() { return this; }
894 
895 public:
896  /// Iterates through all the redeclarations of the same decl.
898  /// Current - The current declaration.
899  Decl *Current = nullptr;
900  Decl *Starter;
901 
902  public:
903  using value_type = Decl *;
904  using reference = const value_type &;
905  using pointer = const value_type *;
906  using iterator_category = std::forward_iterator_tag;
908 
909  redecl_iterator() = default;
910  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
911 
912  reference operator*() const { return Current; }
913  value_type operator->() const { return Current; }
914 
916  assert(Current && "Advancing while iterator has reached end");
917  // Get either previous decl or latest decl.
918  Decl *Next = Current->getNextRedeclarationImpl();
919  assert(Next && "Should return next redeclaration or itself, never null!");
920  Current = (Next != Starter) ? Next : nullptr;
921  return *this;
922  }
923 
925  redecl_iterator tmp(*this);
926  ++(*this);
927  return tmp;
928  }
929 
931  return x.Current == y.Current;
932  }
933 
935  return x.Current != y.Current;
936  }
937  };
938 
939  using redecl_range = llvm::iterator_range<redecl_iterator>;
940 
941  /// Returns an iterator range for all the redeclarations of the same
942  /// decl. It will iterate at least once (when this decl is the only one).
945  }
946 
948  return redecl_iterator(const_cast<Decl *>(this));
949  }
950 
952 
953  /// Retrieve the previous declaration that declares the same entity
954  /// as this declaration, or NULL if there is no previous declaration.
956 
957  /// Retrieve the most recent declaration that declares the same entity
958  /// as this declaration, or NULL if there is no previous declaration.
959  const Decl *getPreviousDecl() const {
960  return const_cast<Decl *>(this)->getPreviousDeclImpl();
961  }
962 
963  /// True if this is the first declaration in its redeclaration chain.
964  bool isFirstDecl() const {
965  return getPreviousDecl() == nullptr;
966  }
967 
968  /// Retrieve the most recent declaration that declares the same entity
969  /// as this declaration (which may be this declaration).
971 
972  /// Retrieve the most recent declaration that declares the same entity
973  /// as this declaration (which may be this declaration).
974  const Decl *getMostRecentDecl() const {
975  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
976  }
977 
978  /// getBody - If this Decl represents a declaration for a body of code,
979  /// such as a function or method definition, this method returns the
980  /// top-level Stmt* of that body. Otherwise this method returns null.
981  virtual Stmt* getBody() const { return nullptr; }
982 
983  /// Returns true if this \c Decl represents a declaration for a body of
984  /// code, such as a function or method definition.
985  /// Note that \c hasBody can also return true if any redeclaration of this
986  /// \c Decl represents a declaration for a body of code.
987  virtual bool hasBody() const { return getBody() != nullptr; }
988 
989  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
990  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
992 
993  // global temp stats (until we have a per-module visitor)
994  static void add(Kind k);
995  static void EnableStatistics();
996  static void PrintStats();
997 
998  /// isTemplateParameter - Determines whether this declaration is a
999  /// template parameter.
1000  bool isTemplateParameter() const;
1001 
1002  /// isTemplateParameter - Determines whether this declaration is a
1003  /// template parameter pack.
1004  bool isTemplateParameterPack() const;
1005 
1006  /// Whether this declaration is a parameter pack.
1007  bool isParameterPack() const;
1008 
1009  /// returns true if this declaration is a template
1010  bool isTemplateDecl() const;
1011 
1012  /// Whether this declaration is a function or function template.
1014  return (DeclKind >= Decl::firstFunction &&
1015  DeclKind <= Decl::lastFunction) ||
1016  DeclKind == FunctionTemplate;
1017  }
1018 
1019  /// If this is a declaration that describes some template, this
1020  /// method returns that template declaration.
1022 
1023  /// Returns the function itself, or the templated function if this is a
1024  /// function template.
1025  FunctionDecl *getAsFunction() LLVM_READONLY;
1026 
1027  const FunctionDecl *getAsFunction() const {
1028  return const_cast<Decl *>(this)->getAsFunction();
1029  }
1030 
1031  /// Changes the namespace of this declaration to reflect that it's
1032  /// a function-local extern declaration.
1033  ///
1034  /// These declarations appear in the lexical context of the extern
1035  /// declaration, but in the semantic context of the enclosing namespace
1036  /// scope.
1038  Decl *Prev = getPreviousDecl();
1040 
1041  // It's OK for the declaration to still have the "invisible friend" flag or
1042  // the "conflicts with tag declarations in this scope" flag for the outer
1043  // scope.
1044  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1045  "namespace is not ordinary");
1046 
1048  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1050  }
1051 
1052  /// Determine whether this is a block-scope declaration with linkage.
1053  /// This will either be a local variable declaration declared 'extern', or a
1054  /// local function declaration.
1057  }
1058 
1059  /// Changes the namespace of this declaration to reflect that it's
1060  /// the object of a friend declaration.
1061  ///
1062  /// These declarations appear in the lexical context of the friending
1063  /// class, but in the semantic context of the actual entity. This property
1064  /// applies only to a specific decl object; other redeclarations of the
1065  /// same entity may not (and probably don't) share this property.
1066  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1067  unsigned OldNS = IdentifierNamespace;
1068  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1071  "namespace includes neither ordinary nor tag");
1072  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1075  "namespace includes other than ordinary or tag");
1076 
1077  Decl *Prev = getPreviousDecl();
1079 
1080  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1082  if (PerformFriendInjection ||
1083  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1085  }
1086 
1087  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend |
1090  if (PerformFriendInjection ||
1091  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1093  }
1094  }
1095 
1097  FOK_None, ///< Not a friend object.
1098  FOK_Declared, ///< A friend of a previously-declared entity.
1099  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1100  };
1101 
1102  /// Determines whether this declaration is the object of a
1103  /// friend declaration and, if so, what kind.
1104  ///
1105  /// There is currently no direct way to find the associated FriendDecl.
1107  unsigned mask =
1109  if (!mask) return FOK_None;
1111  : FOK_Undeclared);
1112  }
1113 
1114  /// Specifies that this declaration is a C++ overloaded non-member.
1116  assert(getKind() == Function || getKind() == FunctionTemplate);
1117  assert((IdentifierNamespace & IDNS_Ordinary) &&
1118  "visible non-member operators should be in ordinary namespace");
1120  }
1121 
1122  static bool classofKind(Kind K) { return true; }
1123  static DeclContext *castToDeclContext(const Decl *);
1124  static Decl *castFromDeclContext(const DeclContext *);
1125 
1126  void print(raw_ostream &Out, unsigned Indentation = 0,
1127  bool PrintInstantiation = false) const;
1128  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1129  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1130  static void printGroup(Decl** Begin, unsigned NumDecls,
1131  raw_ostream &Out, const PrintingPolicy &Policy,
1132  unsigned Indentation = 0);
1133 
1134  // Debuggers don't usually respect default arguments.
1135  void dump() const;
1136 
1137  // Same as dump(), but forces color printing.
1138  void dumpColor() const;
1139 
1140  void dump(raw_ostream &Out, bool Deserialize = false) const;
1141 
1142  /// \return Unique reproducible object identifier
1143  int64_t getID() const;
1144 
1145  /// Looks through the Decl's underlying type to extract a FunctionType
1146  /// when possible. Will return null if the type underlying the Decl does not
1147  /// have a FunctionType.
1148  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1149 
1150 private:
1151  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1152  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1153  ASTContext &Ctx);
1154 
1155 protected:
1157 };
1158 
1159 /// Determine whether two declarations declare the same entity.
1160 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1161  if (!D1 || !D2)
1162  return false;
1163 
1164  if (D1 == D2)
1165  return true;
1166 
1167  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1168 }
1169 
1170 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1171 /// doing something to a specific decl.
1172 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1173  const Decl *TheDecl;
1174  SourceLocation Loc;
1175  SourceManager &SM;
1176  const char *Message;
1177 
1178 public:
1180  SourceManager &sm, const char *Msg)
1181  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1182 
1183  void print(raw_ostream &OS) const override;
1184 };
1185 
1186 /// The results of name lookup within a DeclContext. This is either a
1187 /// single result (with no stable storage) or a collection of results (with
1188 /// stable storage provided by the lookup table).
1191 
1192  ResultTy Result;
1193 
1194  // If there is only one lookup result, it would be invalidated by
1195  // reallocations of the name table, so store it separately.
1196  NamedDecl *Single = nullptr;
1197 
1198  static NamedDecl *const SingleElementDummyList;
1199 
1200 public:
1201  DeclContextLookupResult() = default;
1203  : Result(Result) {}
1205  : Result(SingleElementDummyList), Single(Single) {}
1206 
1207  class iterator;
1208 
1209  using IteratorBase =
1210  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1211  std::random_access_iterator_tag,
1212  NamedDecl *const>;
1213 
1214  class iterator : public IteratorBase {
1215  value_type SingleElement;
1216 
1217  public:
1218  explicit iterator(pointer Pos, value_type Single = nullptr)
1219  : IteratorBase(Pos), SingleElement(Single) {}
1220 
1222  return SingleElement ? SingleElement : IteratorBase::operator*();
1223  }
1224  };
1225 
1226  using const_iterator = iterator;
1227  using pointer = iterator::pointer;
1228  using reference = iterator::reference;
1229 
1230  iterator begin() const { return iterator(Result.begin(), Single); }
1231  iterator end() const { return iterator(Result.end(), Single); }
1232 
1233  bool empty() const { return Result.empty(); }
1234  pointer data() const { return Single ? &Single : Result.data(); }
1235  size_t size() const { return Single ? 1 : Result.size(); }
1236  reference front() const { return Single ? Single : Result.front(); }
1237  reference back() const { return Single ? Single : Result.back(); }
1238  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1239 
1240  // FIXME: Remove this from the interface
1241  DeclContextLookupResult slice(size_t N) const {
1242  DeclContextLookupResult Sliced = Result.slice(N);
1243  Sliced.Single = Single;
1244  return Sliced;
1245  }
1246 };
1247 
1248 /// DeclContext - This is used only as base class of specific decl types that
1249 /// can act as declaration contexts. These decls are (only the top classes
1250 /// that directly derive from DeclContext are mentioned, not their subclasses):
1251 ///
1252 /// TranslationUnitDecl
1253 /// ExternCContext
1254 /// NamespaceDecl
1255 /// TagDecl
1256 /// OMPDeclareReductionDecl
1257 /// OMPDeclareMapperDecl
1258 /// FunctionDecl
1259 /// ObjCMethodDecl
1260 /// ObjCContainerDecl
1261 /// LinkageSpecDecl
1262 /// ExportDecl
1263 /// BlockDecl
1264 /// CapturedDecl
1266  /// For makeDeclVisibleInContextImpl
1267  friend class ASTDeclReader;
1268  /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap,
1269  /// hasNeedToReconcileExternalVisibleStorage
1270  friend class ExternalASTSource;
1271  /// For CreateStoredDeclsMap
1272  friend class DependentDiagnostic;
1273  /// For hasNeedToReconcileExternalVisibleStorage,
1274  /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups
1275  friend class ASTWriter;
1276 
1277  // We use uint64_t in the bit-fields below since some bit-fields
1278  // cross the unsigned boundary and this breaks the packing.
1279 
1280  /// Stores the bits used by DeclContext.
1281  /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor
1282  /// methods in DeclContext should be updated appropriately.
1283  class DeclContextBitfields {
1284  friend class DeclContext;
1285  /// DeclKind - This indicates which class this is.
1286  uint64_t DeclKind : 7;
1287 
1288  /// Whether this declaration context also has some external
1289  /// storage that contains additional declarations that are lexically
1290  /// part of this context.
1291  mutable uint64_t ExternalLexicalStorage : 1;
1292 
1293  /// Whether this declaration context also has some external
1294  /// storage that contains additional declarations that are visible
1295  /// in this context.
1296  mutable uint64_t ExternalVisibleStorage : 1;
1297 
1298  /// Whether this declaration context has had externally visible
1299  /// storage added since the last lookup. In this case, \c LookupPtr's
1300  /// invariant may not hold and needs to be fixed before we perform
1301  /// another lookup.
1302  mutable uint64_t NeedToReconcileExternalVisibleStorage : 1;
1303 
1304  /// If \c true, this context may have local lexical declarations
1305  /// that are missing from the lookup table.
1306  mutable uint64_t HasLazyLocalLexicalLookups : 1;
1307 
1308  /// If \c true, the external source may have lexical declarations
1309  /// that are missing from the lookup table.
1310  mutable uint64_t HasLazyExternalLexicalLookups : 1;
1311 
1312  /// If \c true, lookups should only return identifier from
1313  /// DeclContext scope (for example TranslationUnit). Used in
1314  /// LookupQualifiedName()
1315  mutable uint64_t UseQualifiedLookup : 1;
1316  };
1317 
1318  /// Number of bits in DeclContextBitfields.
1319  enum { NumDeclContextBits = 13 };
1320 
1321  /// Stores the bits used by TagDecl.
1322  /// If modified NumTagDeclBits and the accessor
1323  /// methods in TagDecl should be updated appropriately.
1324  class TagDeclBitfields {
1325  friend class TagDecl;
1326  /// For the bits in DeclContextBitfields
1327  uint64_t : NumDeclContextBits;
1328 
1329  /// The TagKind enum.
1330  uint64_t TagDeclKind : 3;
1331 
1332  /// True if this is a definition ("struct foo {};"), false if it is a
1333  /// declaration ("struct foo;"). It is not considered a definition
1334  /// until the definition has been fully processed.
1335  uint64_t IsCompleteDefinition : 1;
1336 
1337  /// True if this is currently being defined.
1338  uint64_t IsBeingDefined : 1;
1339 
1340  /// True if this tag declaration is "embedded" (i.e., defined or declared
1341  /// for the very first time) in the syntax of a declarator.
1342  uint64_t IsEmbeddedInDeclarator : 1;
1343 
1344  /// True if this tag is free standing, e.g. "struct foo;".
1345  uint64_t IsFreeStanding : 1;
1346 
1347  /// Indicates whether it is possible for declarations of this kind
1348  /// to have an out-of-date definition.
1349  ///
1350  /// This option is only enabled when modules are enabled.
1351  uint64_t MayHaveOutOfDateDef : 1;
1352 
1353  /// Has the full definition of this type been required by a use somewhere in
1354  /// the TU.
1355  uint64_t IsCompleteDefinitionRequired : 1;
1356  };
1357 
1358  /// Number of non-inherited bits in TagDeclBitfields.
1359  enum { NumTagDeclBits = 9 };
1360 
1361  /// Stores the bits used by EnumDecl.
1362  /// If modified NumEnumDeclBit and the accessor
1363  /// methods in EnumDecl should be updated appropriately.
1364  class EnumDeclBitfields {
1365  friend class EnumDecl;
1366  /// For the bits in DeclContextBitfields.
1367  uint64_t : NumDeclContextBits;
1368  /// For the bits in TagDeclBitfields.
1369  uint64_t : NumTagDeclBits;
1370 
1371  /// Width in bits required to store all the non-negative
1372  /// enumerators of this enum.
1373  uint64_t NumPositiveBits : 8;
1374 
1375  /// Width in bits required to store all the negative
1376  /// enumerators of this enum.
1377  uint64_t NumNegativeBits : 8;
1378 
1379  /// True if this tag declaration is a scoped enumeration. Only
1380  /// possible in C++11 mode.
1381  uint64_t IsScoped : 1;
1382 
1383  /// If this tag declaration is a scoped enum,
1384  /// then this is true if the scoped enum was declared using the class
1385  /// tag, false if it was declared with the struct tag. No meaning is
1386  /// associated if this tag declaration is not a scoped enum.
1387  uint64_t IsScopedUsingClassTag : 1;
1388 
1389  /// True if this is an enumeration with fixed underlying type. Only
1390  /// possible in C++11, Microsoft extensions, or Objective C mode.
1391  uint64_t IsFixed : 1;
1392 
1393  /// True if a valid hash is stored in ODRHash.
1394  uint64_t HasODRHash : 1;
1395  };
1396 
1397  /// Number of non-inherited bits in EnumDeclBitfields.
1398  enum { NumEnumDeclBits = 20 };
1399 
1400  /// Stores the bits used by RecordDecl.
1401  /// If modified NumRecordDeclBits and the accessor
1402  /// methods in RecordDecl should be updated appropriately.
1403  class RecordDeclBitfields {
1404  friend class RecordDecl;
1405  /// For the bits in DeclContextBitfields.
1406  uint64_t : NumDeclContextBits;
1407  /// For the bits in TagDeclBitfields.
1408  uint64_t : NumTagDeclBits;
1409 
1410  /// This is true if this struct ends with a flexible
1411  /// array member (e.g. int X[]) or if this union contains a struct that does.
1412  /// If so, this cannot be contained in arrays or other structs as a member.
1413  uint64_t HasFlexibleArrayMember : 1;
1414 
1415  /// Whether this is the type of an anonymous struct or union.
1416  uint64_t AnonymousStructOrUnion : 1;
1417 
1418  /// This is true if this struct has at least one member
1419  /// containing an Objective-C object pointer type.
1420  uint64_t HasObjectMember : 1;
1421 
1422  /// This is true if struct has at least one member of
1423  /// 'volatile' type.
1424  uint64_t HasVolatileMember : 1;
1425 
1426  /// Whether the field declarations of this record have been loaded
1427  /// from external storage. To avoid unnecessary deserialization of
1428  /// methods/nested types we allow deserialization of just the fields
1429  /// when needed.
1430  mutable uint64_t LoadedFieldsFromExternalStorage : 1;
1431 
1432  /// Basic properties of non-trivial C structs.
1433  uint64_t NonTrivialToPrimitiveDefaultInitialize : 1;
1434  uint64_t NonTrivialToPrimitiveCopy : 1;
1435  uint64_t NonTrivialToPrimitiveDestroy : 1;
1436 
1437  /// Indicates whether this struct is destroyed in the callee.
1438  uint64_t ParamDestroyedInCallee : 1;
1439 
1440  /// Represents the way this type is passed to a function.
1441  uint64_t ArgPassingRestrictions : 2;
1442  };
1443 
1444  /// Number of non-inherited bits in RecordDeclBitfields.
1445  enum { NumRecordDeclBits = 11 };
1446 
1447  /// Stores the bits used by OMPDeclareReductionDecl.
1448  /// If modified NumOMPDeclareReductionDeclBits and the accessor
1449  /// methods in OMPDeclareReductionDecl should be updated appropriately.
1450  class OMPDeclareReductionDeclBitfields {
1451  friend class OMPDeclareReductionDecl;
1452  /// For the bits in DeclContextBitfields
1453  uint64_t : NumDeclContextBits;
1454 
1455  /// Kind of initializer,
1456  /// function call or omp_priv<init_expr> initializtion.
1457  uint64_t InitializerKind : 2;
1458  };
1459 
1460  /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields.
1461  enum { NumOMPDeclareReductionDeclBits = 2 };
1462 
1463  /// Stores the bits used by FunctionDecl.
1464  /// If modified NumFunctionDeclBits and the accessor
1465  /// methods in FunctionDecl and CXXDeductionGuideDecl
1466  /// (for IsCopyDeductionCandidate) should be updated appropriately.
1467  class FunctionDeclBitfields {
1468  friend class FunctionDecl;
1469  /// For IsCopyDeductionCandidate
1470  friend class CXXDeductionGuideDecl;
1471  /// For the bits in DeclContextBitfields.
1472  uint64_t : NumDeclContextBits;
1473 
1474  uint64_t SClass : 3;
1475  uint64_t IsInline : 1;
1476  uint64_t IsInlineSpecified : 1;
1477 
1478  /// This is shared by CXXConstructorDecl,
1479  /// CXXConversionDecl, and CXXDeductionGuideDecl.
1480  uint64_t IsExplicitSpecified : 1;
1481 
1482  uint64_t IsVirtualAsWritten : 1;
1483  uint64_t IsPure : 1;
1484  uint64_t HasInheritedPrototype : 1;
1485  uint64_t HasWrittenPrototype : 1;
1486  uint64_t IsDeleted : 1;
1487  /// Used by CXXMethodDecl
1488  uint64_t IsTrivial : 1;
1489 
1490  /// This flag indicates whether this function is trivial for the purpose of
1491  /// calls. This is meaningful only when this function is a copy/move
1492  /// constructor or a destructor.
1493  uint64_t IsTrivialForCall : 1;
1494 
1495  /// Used by CXXMethodDecl
1496  uint64_t IsDefaulted : 1;
1497  /// Used by CXXMethodDecl
1498  uint64_t IsExplicitlyDefaulted : 1;
1499  uint64_t HasImplicitReturnZero : 1;
1500  uint64_t IsLateTemplateParsed : 1;
1501  uint64_t IsConstexpr : 1;
1502  uint64_t InstantiationIsPending : 1;
1503 
1504  /// Indicates if the function uses __try.
1505  uint64_t UsesSEHTry : 1;
1506 
1507  /// Indicates if the function was a definition
1508  /// but its body was skipped.
1509  uint64_t HasSkippedBody : 1;
1510 
1511  /// Indicates if the function declaration will
1512  /// have a body, once we're done parsing it.
1513  uint64_t WillHaveBody : 1;
1514 
1515  /// Indicates that this function is a multiversioned
1516  /// function using attribute 'target'.
1517  uint64_t IsMultiVersion : 1;
1518 
1519  /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that
1520  /// the Deduction Guide is the implicitly generated 'copy
1521  /// deduction candidate' (is used during overload resolution).
1522  uint64_t IsCopyDeductionCandidate : 1;
1523 
1524  /// Store the ODRHash after first calculation.
1525  uint64_t HasODRHash : 1;
1526  };
1527 
1528  /// Number of non-inherited bits in FunctionDeclBitfields.
1529  enum { NumFunctionDeclBits = 25 };
1530 
1531  /// Stores the bits used by CXXConstructorDecl. If modified
1532  /// NumCXXConstructorDeclBits and the accessor
1533  /// methods in CXXConstructorDecl should be updated appropriately.
1534  class CXXConstructorDeclBitfields {
1535  friend class CXXConstructorDecl;
1536  /// For the bits in DeclContextBitfields.
1537  uint64_t : NumDeclContextBits;
1538  /// For the bits in FunctionDeclBitfields.
1539  uint64_t : NumFunctionDeclBits;
1540 
1541  /// 25 bits to fit in the remaining availible space.
1542  /// Note that this makes CXXConstructorDeclBitfields take
1543  /// exactly 64 bits and thus the width of NumCtorInitializers
1544  /// will need to be shrunk if some bit is added to NumDeclContextBitfields,
1545  /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields.
1546  uint64_t NumCtorInitializers : 25;
1547  uint64_t IsInheritingConstructor : 1;
1548  };
1549 
1550  /// Number of non-inherited bits in CXXConstructorDeclBitfields.
1551  enum { NumCXXConstructorDeclBits = 26 };
1552 
1553  /// Stores the bits used by ObjCMethodDecl.
1554  /// If modified NumObjCMethodDeclBits and the accessor
1555  /// methods in ObjCMethodDecl should be updated appropriately.
1556  class ObjCMethodDeclBitfields {
1557  friend class ObjCMethodDecl;
1558 
1559  /// For the bits in DeclContextBitfields.
1560  uint64_t : NumDeclContextBits;
1561 
1562  /// The conventional meaning of this method; an ObjCMethodFamily.
1563  /// This is not serialized; instead, it is computed on demand and
1564  /// cached.
1565  mutable uint64_t Family : ObjCMethodFamilyBitWidth;
1566 
1567  /// instance (true) or class (false) method.
1568  uint64_t IsInstance : 1;
1569  uint64_t IsVariadic : 1;
1570 
1571  /// True if this method is the getter or setter for an explicit property.
1572  uint64_t IsPropertyAccessor : 1;
1573 
1574  /// Method has a definition.
1575  uint64_t IsDefined : 1;
1576 
1577  /// Method redeclaration in the same interface.
1578  uint64_t IsRedeclaration : 1;
1579 
1580  /// Is redeclared in the same interface.
1581  mutable uint64_t HasRedeclaration : 1;
1582 
1583  /// \@required/\@optional
1584  uint64_t DeclImplementation : 2;
1585 
1586  /// in, inout, etc.
1587  uint64_t objcDeclQualifier : 7;
1588 
1589  /// Indicates whether this method has a related result type.
1590  uint64_t RelatedResultType : 1;
1591 
1592  /// Whether the locations of the selector identifiers are in a
1593  /// "standard" position, a enum SelectorLocationsKind.
1594  uint64_t SelLocsKind : 2;
1595 
1596  /// Whether this method overrides any other in the class hierarchy.
1597  ///
1598  /// A method is said to override any method in the class's
1599  /// base classes, its protocols, or its categories' protocols, that has
1600  /// the same selector and is of the same kind (class or instance).
1601  /// A method in an implementation is not considered as overriding the same
1602  /// method in the interface or its categories.
1603  uint64_t IsOverriding : 1;
1604 
1605  /// Indicates if the method was a definition but its body was skipped.
1606  uint64_t HasSkippedBody : 1;
1607  };
1608 
1609  /// Number of non-inherited bits in ObjCMethodDeclBitfields.
1610  enum { NumObjCMethodDeclBits = 24 };
1611 
1612  /// Stores the bits used by ObjCContainerDecl.
1613  /// If modified NumObjCContainerDeclBits and the accessor
1614  /// methods in ObjCContainerDecl should be updated appropriately.
1615  class ObjCContainerDeclBitfields {
1616  friend class ObjCContainerDecl;
1617  /// For the bits in DeclContextBitfields
1618  uint32_t : NumDeclContextBits;
1619 
1620  // Not a bitfield but this saves space.
1621  // Note that ObjCContainerDeclBitfields is full.
1622  SourceLocation AtStart;
1623  };
1624 
1625  /// Number of non-inherited bits in ObjCContainerDeclBitfields.
1626  /// Note that here we rely on the fact that SourceLocation is 32 bits
1627  /// wide. We check this with the static_assert in the ctor of DeclContext.
1628  enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits };
1629 
1630  /// Stores the bits used by LinkageSpecDecl.
1631  /// If modified NumLinkageSpecDeclBits and the accessor
1632  /// methods in LinkageSpecDecl should be updated appropriately.
1633  class LinkageSpecDeclBitfields {
1634  friend class LinkageSpecDecl;
1635  /// For the bits in DeclContextBitfields.
1636  uint64_t : NumDeclContextBits;
1637 
1638  /// The language for this linkage specification with values
1639  /// in the enum LinkageSpecDecl::LanguageIDs.
1640  uint64_t Language : 3;
1641 
1642  /// True if this linkage spec has braces.
1643  /// This is needed so that hasBraces() returns the correct result while the
1644  /// linkage spec body is being parsed. Once RBraceLoc has been set this is
1645  /// not used, so it doesn't need to be serialized.
1646  uint64_t HasBraces : 1;
1647  };
1648 
1649  /// Number of non-inherited bits in LinkageSpecDeclBitfields.
1650  enum { NumLinkageSpecDeclBits = 4 };
1651 
1652  /// Stores the bits used by BlockDecl.
1653  /// If modified NumBlockDeclBits and the accessor
1654  /// methods in BlockDecl should be updated appropriately.
1655  class BlockDeclBitfields {
1656  friend class BlockDecl;
1657  /// For the bits in DeclContextBitfields.
1658  uint64_t : NumDeclContextBits;
1659 
1660  uint64_t IsVariadic : 1;
1661  uint64_t CapturesCXXThis : 1;
1662  uint64_t BlockMissingReturnType : 1;
1663  uint64_t IsConversionFromLambda : 1;
1664 
1665  /// A bit that indicates this block is passed directly to a function as a
1666  /// non-escaping parameter.
1667  uint64_t DoesNotEscape : 1;
1668  };
1669 
1670  /// Number of non-inherited bits in BlockDeclBitfields.
1671  enum { NumBlockDeclBits = 5 };
1672 
1673  /// Pointer to the data structure used to lookup declarations
1674  /// within this context (or a DependentStoredDeclsMap if this is a
1675  /// dependent context). We maintain the invariant that, if the map
1676  /// contains an entry for a DeclarationName (and we haven't lazily
1677  /// omitted anything), then it contains all relevant entries for that
1678  /// name (modulo the hasExternalDecls() flag).
1679  mutable StoredDeclsMap *LookupPtr = nullptr;
1680 
1681 protected:
1682  /// This anonymous union stores the bits belonging to DeclContext and classes
1683  /// deriving from it. The goal is to use otherwise wasted
1684  /// space in DeclContext to store data belonging to derived classes.
1685  /// The space saved is especially significient when pointers are aligned
1686  /// to 8 bytes. In this case due to alignment requirements we have a
1687  /// little less than 8 bytes free in DeclContext which we can use.
1688  /// We check that none of the classes in this union is larger than
1689  /// 8 bytes with static_asserts in the ctor of DeclContext.
1690  union {
1691  DeclContextBitfields DeclContextBits;
1692  TagDeclBitfields TagDeclBits;
1693  EnumDeclBitfields EnumDeclBits;
1694  RecordDeclBitfields RecordDeclBits;
1695  OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits;
1696  FunctionDeclBitfields FunctionDeclBits;
1697  CXXConstructorDeclBitfields CXXConstructorDeclBits;
1698  ObjCMethodDeclBitfields ObjCMethodDeclBits;
1699  ObjCContainerDeclBitfields ObjCContainerDeclBits;
1700  LinkageSpecDeclBitfields LinkageSpecDeclBits;
1701  BlockDeclBitfields BlockDeclBits;
1702 
1703  static_assert(sizeof(DeclContextBitfields) <= 8,
1704  "DeclContextBitfields is larger than 8 bytes!");
1705  static_assert(sizeof(TagDeclBitfields) <= 8,
1706  "TagDeclBitfields is larger than 8 bytes!");
1707  static_assert(sizeof(EnumDeclBitfields) <= 8,
1708  "EnumDeclBitfields is larger than 8 bytes!");
1709  static_assert(sizeof(RecordDeclBitfields) <= 8,
1710  "RecordDeclBitfields is larger than 8 bytes!");
1711  static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8,
1712  "OMPDeclareReductionDeclBitfields is larger than 8 bytes!");
1713  static_assert(sizeof(FunctionDeclBitfields) <= 8,
1714  "FunctionDeclBitfields is larger than 8 bytes!");
1715  static_assert(sizeof(CXXConstructorDeclBitfields) <= 8,
1716  "CXXConstructorDeclBitfields is larger than 8 bytes!");
1717  static_assert(sizeof(ObjCMethodDeclBitfields) <= 8,
1718  "ObjCMethodDeclBitfields is larger than 8 bytes!");
1719  static_assert(sizeof(ObjCContainerDeclBitfields) <= 8,
1720  "ObjCContainerDeclBitfields is larger than 8 bytes!");
1721  static_assert(sizeof(LinkageSpecDeclBitfields) <= 8,
1722  "LinkageSpecDeclBitfields is larger than 8 bytes!");
1723  static_assert(sizeof(BlockDeclBitfields) <= 8,
1724  "BlockDeclBitfields is larger than 8 bytes!");
1725  };
1726 
1727  /// FirstDecl - The first declaration stored within this declaration
1728  /// context.
1729  mutable Decl *FirstDecl = nullptr;
1730 
1731  /// LastDecl - The last declaration stored within this declaration
1732  /// context. FIXME: We could probably cache this value somewhere
1733  /// outside of the DeclContext, to reduce the size of DeclContext by
1734  /// another pointer.
1735  mutable Decl *LastDecl = nullptr;
1736 
1737  /// Build up a chain of declarations.
1738  ///
1739  /// \returns the first/last pair of declarations.
1740  static std::pair<Decl *, Decl *>
1741  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1742 
1744 
1745 public:
1746  ~DeclContext();
1747 
1749  return static_cast<Decl::Kind>(DeclContextBits.DeclKind);
1750  }
1751 
1752  const char *getDeclKindName() const;
1753 
1754  /// getParent - Returns the containing DeclContext.
1756  return cast<Decl>(this)->getDeclContext();
1757  }
1758  const DeclContext *getParent() const {
1759  return const_cast<DeclContext*>(this)->getParent();
1760  }
1761 
1762  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1763  /// different from getParent, e.g.:
1764  ///
1765  /// namespace A {
1766  /// struct S;
1767  /// }
1768  /// struct A::S {}; // getParent() == namespace 'A'
1769  /// // getLexicalParent() == translation unit
1770  ///
1772  return cast<Decl>(this)->getLexicalDeclContext();
1773  }
1775  return const_cast<DeclContext*>(this)->getLexicalParent();
1776  }
1777 
1778  DeclContext *getLookupParent();
1779 
1780  const DeclContext *getLookupParent() const {
1781  return const_cast<DeclContext*>(this)->getLookupParent();
1782  }
1783 
1785  return cast<Decl>(this)->getASTContext();
1786  }
1787 
1788  bool isClosure() const { return getDeclKind() == Decl::Block; }
1789 
1790  bool isObjCContainer() const {
1791  switch (getDeclKind()) {
1792  case Decl::ObjCCategory:
1793  case Decl::ObjCCategoryImpl:
1794  case Decl::ObjCImplementation:
1795  case Decl::ObjCInterface:
1796  case Decl::ObjCProtocol:
1797  return true;
1798  default:
1799  return false;
1800  }
1801  }
1802 
1803  bool isFunctionOrMethod() const {
1804  switch (getDeclKind()) {
1805  case Decl::Block:
1806  case Decl::Captured:
1807  case Decl::ObjCMethod:
1808  return true;
1809  default:
1810  return getDeclKind() >= Decl::firstFunction &&
1811  getDeclKind() <= Decl::lastFunction;
1812  }
1813  }
1814 
1815  /// Test whether the context supports looking up names.
1816  bool isLookupContext() const {
1817  return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec &&
1818  getDeclKind() != Decl::Export;
1819  }
1820 
1821  bool isFileContext() const {
1822  return getDeclKind() == Decl::TranslationUnit ||
1823  getDeclKind() == Decl::Namespace;
1824  }
1825 
1826  bool isTranslationUnit() const {
1827  return getDeclKind() == Decl::TranslationUnit;
1828  }
1829 
1830  bool isRecord() const {
1831  return getDeclKind() >= Decl::firstRecord &&
1832  getDeclKind() <= Decl::lastRecord;
1833  }
1834 
1835  bool isNamespace() const { return getDeclKind() == Decl::Namespace; }
1836 
1837  bool isStdNamespace() const;
1838 
1839  bool isInlineNamespace() const;
1840 
1841  /// Determines whether this context is dependent on a
1842  /// template parameter.
1843  bool isDependentContext() const;
1844 
1845  /// isTransparentContext - Determines whether this context is a
1846  /// "transparent" context, meaning that the members declared in this
1847  /// context are semantically declared in the nearest enclosing
1848  /// non-transparent (opaque) context but are lexically declared in
1849  /// this context. For example, consider the enumerators of an
1850  /// enumeration type:
1851  /// @code
1852  /// enum E {
1853  /// Val1
1854  /// };
1855  /// @endcode
1856  /// Here, E is a transparent context, so its enumerator (Val1) will
1857  /// appear (semantically) that it is in the same context of E.
1858  /// Examples of transparent contexts include: enumerations (except for
1859  /// C++0x scoped enums), and C++ linkage specifications.
1860  bool isTransparentContext() const;
1861 
1862  /// Determines whether this context or some of its ancestors is a
1863  /// linkage specification context that specifies C linkage.
1864  bool isExternCContext() const;
1865 
1866  /// Retrieve the nearest enclosing C linkage specification context.
1867  const LinkageSpecDecl *getExternCContext() const;
1868 
1869  /// Determines whether this context or some of its ancestors is a
1870  /// linkage specification context that specifies C++ linkage.
1871  bool isExternCXXContext() const;
1872 
1873  /// Determine whether this declaration context is equivalent
1874  /// to the declaration context DC.
1875  bool Equals(const DeclContext *DC) const {
1876  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1877  }
1878 
1879  /// Determine whether this declaration context encloses the
1880  /// declaration context DC.
1881  bool Encloses(const DeclContext *DC) const;
1882 
1883  /// Find the nearest non-closure ancestor of this context,
1884  /// i.e. the innermost semantic parent of this context which is not
1885  /// a closure. A context may be its own non-closure ancestor.
1886  Decl *getNonClosureAncestor();
1887  const Decl *getNonClosureAncestor() const {
1888  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1889  }
1890 
1891  /// getPrimaryContext - There may be many different
1892  /// declarations of the same entity (including forward declarations
1893  /// of classes, multiple definitions of namespaces, etc.), each with
1894  /// a different set of declarations. This routine returns the
1895  /// "primary" DeclContext structure, which will contain the
1896  /// information needed to perform name lookup into this context.
1897  DeclContext *getPrimaryContext();
1899  return const_cast<DeclContext*>(this)->getPrimaryContext();
1900  }
1901 
1902  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1903  /// other entities of the same name, or where it is a redeclaration if the
1904  /// two entities are compatible. This skips through transparent contexts.
1905  DeclContext *getRedeclContext();
1907  return const_cast<DeclContext *>(this)->getRedeclContext();
1908  }
1909 
1910  /// Retrieve the nearest enclosing namespace context.
1911  DeclContext *getEnclosingNamespaceContext();
1913  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1914  }
1915 
1916  /// Retrieve the outermost lexically enclosing record context.
1917  RecordDecl *getOuterLexicalRecordContext();
1919  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1920  }
1921 
1922  /// Test if this context is part of the enclosing namespace set of
1923  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1924  /// isn't a namespace, this is equivalent to Equals().
1925  ///
1926  /// The enclosing namespace set of a namespace is the namespace and, if it is
1927  /// inline, its enclosing namespace, recursively.
1928  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1929 
1930  /// Collects all of the declaration contexts that are semantically
1931  /// connected to this declaration context.
1932  ///
1933  /// For declaration contexts that have multiple semantically connected but
1934  /// syntactically distinct contexts, such as C++ namespaces, this routine
1935  /// retrieves the complete set of such declaration contexts in source order.
1936  /// For example, given:
1937  ///
1938  /// \code
1939  /// namespace N {
1940  /// int x;
1941  /// }
1942  /// namespace N {
1943  /// int y;
1944  /// }
1945  /// \endcode
1946  ///
1947  /// The \c Contexts parameter will contain both definitions of N.
1948  ///
1949  /// \param Contexts Will be cleared and set to the set of declaration
1950  /// contexts that are semanticaly connected to this declaration context,
1951  /// in source order, including this context (which may be the only result,
1952  /// for non-namespace contexts).
1953  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1954 
1955  /// decl_iterator - Iterates through the declarations stored
1956  /// within this context.
1958  /// Current - The current declaration.
1959  Decl *Current = nullptr;
1960 
1961  public:
1962  using value_type = Decl *;
1963  using reference = const value_type &;
1964  using pointer = const value_type *;
1965  using iterator_category = std::forward_iterator_tag;
1967 
1968  decl_iterator() = default;
1969  explicit decl_iterator(Decl *C) : Current(C) {}
1970 
1971  reference operator*() const { return Current; }
1972 
1973  // This doesn't meet the iterator requirements, but it's convenient
1974  value_type operator->() const { return Current; }
1975 
1977  Current = Current->getNextDeclInContext();
1978  return *this;
1979  }
1980 
1982  decl_iterator tmp(*this);
1983  ++(*this);
1984  return tmp;
1985  }
1986 
1988  return x.Current == y.Current;
1989  }
1990 
1992  return x.Current != y.Current;
1993  }
1994  };
1995 
1996  using decl_range = llvm::iterator_range<decl_iterator>;
1997 
1998  /// decls_begin/decls_end - Iterate over the declarations stored in
1999  /// this context.
2000  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
2001  decl_iterator decls_begin() const;
2002  decl_iterator decls_end() const { return decl_iterator(); }
2003  bool decls_empty() const;
2004 
2005  /// noload_decls_begin/end - Iterate over the declarations stored in this
2006  /// context that are currently loaded; don't attempt to retrieve anything
2007  /// from an external source.
2009  return decl_range(noload_decls_begin(), noload_decls_end());
2010  }
2011  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
2013 
2014  /// specific_decl_iterator - Iterates over a subrange of
2015  /// declarations stored in a DeclContext, providing only those that
2016  /// are of type SpecificDecl (or a class derived from it). This
2017  /// iterator is used, for example, to provide iteration over just
2018  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
2019  template<typename SpecificDecl>
2021  /// Current - The current, underlying declaration iterator, which
2022  /// will either be NULL or will point to a declaration of
2023  /// type SpecificDecl.
2025 
2026  /// SkipToNextDecl - Advances the current position up to the next
2027  /// declaration of type SpecificDecl that also meets the criteria
2028  /// required by Acceptable.
2029  void SkipToNextDecl() {
2030  while (*Current && !isa<SpecificDecl>(*Current))
2031  ++Current;
2032  }
2033 
2034  public:
2035  using value_type = SpecificDecl *;
2036  // TODO: Add reference and pointer types (with some appropriate proxy type)
2037  // if we ever have a need for them.
2038  using reference = void;
2039  using pointer = void;
2040  using difference_type =
2041  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2042  using iterator_category = std::forward_iterator_tag;
2043 
2044  specific_decl_iterator() = default;
2045 
2046  /// specific_decl_iterator - Construct a new iterator over a
2047  /// subset of the declarations the range [C,
2048  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2049  /// member function of SpecificDecl that should return true for
2050  /// all of the SpecificDecl instances that will be in the subset
2051  /// of iterators. For example, if you want Objective-C instance
2052  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2053  /// &ObjCMethodDecl::isInstanceMethod.
2055  SkipToNextDecl();
2056  }
2057 
2058  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2059 
2060  // This doesn't meet the iterator requirements, but it's convenient
2061  value_type operator->() const { return **this; }
2062 
2064  ++Current;
2065  SkipToNextDecl();
2066  return *this;
2067  }
2068 
2070  specific_decl_iterator tmp(*this);
2071  ++(*this);
2072  return tmp;
2073  }
2074 
2075  friend bool operator==(const specific_decl_iterator& x,
2076  const specific_decl_iterator& y) {
2077  return x.Current == y.Current;
2078  }
2079 
2080  friend bool operator!=(const specific_decl_iterator& x,
2081  const specific_decl_iterator& y) {
2082  return x.Current != y.Current;
2083  }
2084  };
2085 
2086  /// Iterates over a filtered subrange of declarations stored
2087  /// in a DeclContext.
2088  ///
2089  /// This iterator visits only those declarations that are of type
2090  /// SpecificDecl (or a class derived from it) and that meet some
2091  /// additional run-time criteria. This iterator is used, for
2092  /// example, to provide access to the instance methods within an
2093  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
2094  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
2095  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
2097  /// Current - The current, underlying declaration iterator, which
2098  /// will either be NULL or will point to a declaration of
2099  /// type SpecificDecl.
2101 
2102  /// SkipToNextDecl - Advances the current position up to the next
2103  /// declaration of type SpecificDecl that also meets the criteria
2104  /// required by Acceptable.
2105  void SkipToNextDecl() {
2106  while (*Current &&
2107  (!isa<SpecificDecl>(*Current) ||
2108  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
2109  ++Current;
2110  }
2111 
2112  public:
2113  using value_type = SpecificDecl *;
2114  // TODO: Add reference and pointer types (with some appropriate proxy type)
2115  // if we ever have a need for them.
2116  using reference = void;
2117  using pointer = void;
2118  using difference_type =
2119  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2120  using iterator_category = std::forward_iterator_tag;
2121 
2122  filtered_decl_iterator() = default;
2123 
2124  /// filtered_decl_iterator - Construct a new iterator over a
2125  /// subset of the declarations the range [C,
2126  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2127  /// member function of SpecificDecl that should return true for
2128  /// all of the SpecificDecl instances that will be in the subset
2129  /// of iterators. For example, if you want Objective-C instance
2130  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2131  /// &ObjCMethodDecl::isInstanceMethod.
2133  SkipToNextDecl();
2134  }
2135 
2136  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2137  value_type operator->() const { return cast<SpecificDecl>(*Current); }
2138 
2140  ++Current;
2141  SkipToNextDecl();
2142  return *this;
2143  }
2144 
2146  filtered_decl_iterator tmp(*this);
2147  ++(*this);
2148  return tmp;
2149  }
2150 
2151  friend bool operator==(const filtered_decl_iterator& x,
2152  const filtered_decl_iterator& y) {
2153  return x.Current == y.Current;
2154  }
2155 
2156  friend bool operator!=(const filtered_decl_iterator& x,
2157  const filtered_decl_iterator& y) {
2158  return x.Current != y.Current;
2159  }
2160  };
2161 
2162  /// Add the declaration D into this context.
2163  ///
2164  /// This routine should be invoked when the declaration D has first
2165  /// been declared, to place D into the context where it was
2166  /// (lexically) defined. Every declaration must be added to one
2167  /// (and only one!) context, where it can be visited via
2168  /// [decls_begin(), decls_end()). Once a declaration has been added
2169  /// to its lexical context, the corresponding DeclContext owns the
2170  /// declaration.
2171  ///
2172  /// If D is also a NamedDecl, it will be made visible within its
2173  /// semantic context via makeDeclVisibleInContext.
2174  void addDecl(Decl *D);
2175 
2176  /// Add the declaration D into this context, but suppress
2177  /// searches for external declarations with the same name.
2178  ///
2179  /// Although analogous in function to addDecl, this removes an
2180  /// important check. This is only useful if the Decl is being
2181  /// added in response to an external search; in all other cases,
2182  /// addDecl() is the right function to use.
2183  /// See the ASTImporter for use cases.
2184  void addDeclInternal(Decl *D);
2185 
2186  /// Add the declaration D to this context without modifying
2187  /// any lookup tables.
2188  ///
2189  /// This is useful for some operations in dependent contexts where
2190  /// the semantic context might not be dependent; this basically
2191  /// only happens with friends.
2192  void addHiddenDecl(Decl *D);
2193 
2194  /// Removes a declaration from this context.
2195  void removeDecl(Decl *D);
2196 
2197  /// Checks whether a declaration is in this context.
2198  bool containsDecl(Decl *D) const;
2199 
2200  /// Checks whether a declaration is in this context.
2201  /// This also loads the Decls from the external source before the check.
2202  bool containsDeclAndLoad(Decl *D) const;
2203 
2206 
2207  /// lookup - Find the declarations (if any) with the given Name in
2208  /// this context. Returns a range of iterators that contains all of
2209  /// the declarations with this name, with object, function, member,
2210  /// and enumerator names preceding any tag name. Note that this
2211  /// routine will not look into parent contexts.
2212  lookup_result lookup(DeclarationName Name) const;
2213 
2214  /// Find the declarations with the given name that are visible
2215  /// within this context; don't attempt to retrieve anything from an
2216  /// external source.
2217  lookup_result noload_lookup(DeclarationName Name);
2218 
2219  /// A simplistic name lookup mechanism that performs name lookup
2220  /// into this declaration context without consulting the external source.
2221  ///
2222  /// This function should almost never be used, because it subverts the
2223  /// usual relationship between a DeclContext and the external source.
2224  /// See the ASTImporter for the (few, but important) use cases.
2225  ///
2226  /// FIXME: This is very inefficient; replace uses of it with uses of
2227  /// noload_lookup.
2228  void localUncachedLookup(DeclarationName Name,
2229  SmallVectorImpl<NamedDecl *> &Results);
2230 
2231  /// Makes a declaration visible within this context.
2232  ///
2233  /// This routine makes the declaration D visible to name lookup
2234  /// within this context and, if this is a transparent context,
2235  /// within its parent contexts up to the first enclosing
2236  /// non-transparent context. Making a declaration visible within a
2237  /// context does not transfer ownership of a declaration, and a
2238  /// declaration can be visible in many contexts that aren't its
2239  /// lexical context.
2240  ///
2241  /// If D is a redeclaration of an existing declaration that is
2242  /// visible from this context, as determined by
2243  /// NamedDecl::declarationReplaces, the previous declaration will be
2244  /// replaced with D.
2245  void makeDeclVisibleInContext(NamedDecl *D);
2246 
2247  /// all_lookups_iterator - An iterator that provides a view over the results
2248  /// of looking up every possible name.
2249  class all_lookups_iterator;
2250 
2251  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
2252 
2253  lookups_range lookups() const;
2254  // Like lookups(), but avoids loading external declarations.
2255  // If PreserveInternalState, avoids building lookup data structures too.
2256  lookups_range noload_lookups(bool PreserveInternalState) const;
2257 
2258  /// Iterators over all possible lookups within this context.
2259  all_lookups_iterator lookups_begin() const;
2260  all_lookups_iterator lookups_end() const;
2261 
2262  /// Iterators over all possible lookups within this context that are
2263  /// currently loaded; don't attempt to retrieve anything from an external
2264  /// source.
2265  all_lookups_iterator noload_lookups_begin() const;
2266  all_lookups_iterator noload_lookups_end() const;
2267 
2268  struct udir_iterator;
2269 
2270  using udir_iterator_base =
2271  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
2272  std::random_access_iterator_tag,
2274 
2275  struct udir_iterator : udir_iterator_base {
2276  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
2277 
2278  UsingDirectiveDecl *operator*() const;
2279  };
2280 
2281  using udir_range = llvm::iterator_range<udir_iterator>;
2282 
2283  udir_range using_directives() const;
2284 
2285  // These are all defined in DependentDiagnostic.h.
2286  class ddiag_iterator;
2287 
2288  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
2289 
2290  inline ddiag_range ddiags() const;
2291 
2292  // Low-level accessors
2293 
2294  /// Mark that there are external lexical declarations that we need
2295  /// to include in our lookup table (and that are not available as external
2296  /// visible lookups). These extra lookup results will be found by walking
2297  /// the lexical declarations of this context. This should be used only if
2298  /// setHasExternalLexicalStorage() has been called on any decl context for
2299  /// which this is the primary context.
2301  assert(this == getPrimaryContext() &&
2302  "should only be called on primary context");
2303  DeclContextBits.HasLazyExternalLexicalLookups = true;
2304  }
2305 
2306  /// Retrieve the internal representation of the lookup structure.
2307  /// This may omit some names if we are lazily building the structure.
2308  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
2309 
2310  /// Ensure the lookup structure is fully-built and return it.
2311  StoredDeclsMap *buildLookup();
2312 
2313  /// Whether this DeclContext has external storage containing
2314  /// additional declarations that are lexically in this context.
2316  return DeclContextBits.ExternalLexicalStorage;
2317  }
2318 
2319  /// State whether this DeclContext has external storage for
2320  /// declarations lexically in this context.
2321  void setHasExternalLexicalStorage(bool ES = true) const {
2322  DeclContextBits.ExternalLexicalStorage = ES;
2323  }
2324 
2325  /// Whether this DeclContext has external storage containing
2326  /// additional declarations that are visible in this context.
2328  return DeclContextBits.ExternalVisibleStorage;
2329  }
2330 
2331  /// State whether this DeclContext has external storage for
2332  /// declarations visible in this context.
2333  void setHasExternalVisibleStorage(bool ES = true) const {
2334  DeclContextBits.ExternalVisibleStorage = ES;
2335  if (ES && LookupPtr)
2336  DeclContextBits.NeedToReconcileExternalVisibleStorage = true;
2337  }
2338 
2339  /// Determine whether the given declaration is stored in the list of
2340  /// declarations lexically within this context.
2341  bool isDeclInLexicalTraversal(const Decl *D) const {
2342  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
2343  D == LastDecl);
2344  }
2345 
2346  bool setUseQualifiedLookup(bool use = true) const {
2347  bool old_value = DeclContextBits.UseQualifiedLookup;
2348  DeclContextBits.UseQualifiedLookup = use;
2349  return old_value;
2350  }
2351 
2353  return DeclContextBits.UseQualifiedLookup;
2354  }
2355 
2356  static bool classof(const Decl *D);
2357  static bool classof(const DeclContext *D) { return true; }
2358 
2359  void dumpDeclContext() const;
2360  void dumpLookups() const;
2361  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
2362  bool Deserialize = false) const;
2363 
2364 private:
2365  /// Whether this declaration context has had externally visible
2366  /// storage added since the last lookup. In this case, \c LookupPtr's
2367  /// invariant may not hold and needs to be fixed before we perform
2368  /// another lookup.
2369  bool hasNeedToReconcileExternalVisibleStorage() const {
2370  return DeclContextBits.NeedToReconcileExternalVisibleStorage;
2371  }
2372 
2373  /// State that this declaration context has had externally visible
2374  /// storage added since the last lookup. In this case, \c LookupPtr's
2375  /// invariant may not hold and needs to be fixed before we perform
2376  /// another lookup.
2377  void setNeedToReconcileExternalVisibleStorage(bool Need = true) const {
2378  DeclContextBits.NeedToReconcileExternalVisibleStorage = Need;
2379  }
2380 
2381  /// If \c true, this context may have local lexical declarations
2382  /// that are missing from the lookup table.
2383  bool hasLazyLocalLexicalLookups() const {
2384  return DeclContextBits.HasLazyLocalLexicalLookups;
2385  }
2386 
2387  /// If \c true, this context may have local lexical declarations
2388  /// that are missing from the lookup table.
2389  void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const {
2390  DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL;
2391  }
2392 
2393  /// If \c true, the external source may have lexical declarations
2394  /// that are missing from the lookup table.
2395  bool hasLazyExternalLexicalLookups() const {
2396  return DeclContextBits.HasLazyExternalLexicalLookups;
2397  }
2398 
2399  /// If \c true, the external source may have lexical declarations
2400  /// that are missing from the lookup table.
2401  void setHasLazyExternalLexicalLookups(bool HasLELL = true) const {
2402  DeclContextBits.HasLazyExternalLexicalLookups = HasLELL;
2403  }
2404 
2405  void reconcileExternalVisibleStorage() const;
2406  bool LoadLexicalDeclsFromExternalStorage() const;
2407 
2408  /// Makes a declaration visible within this context, but
2409  /// suppresses searches for external declarations with the same
2410  /// name.
2411  ///
2412  /// Analogous to makeDeclVisibleInContext, but for the exclusive
2413  /// use of addDeclInternal().
2414  void makeDeclVisibleInContextInternal(NamedDecl *D);
2415 
2416  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
2417 
2418  void loadLazyLocalLexicalLookups();
2419  void buildLookupImpl(DeclContext *DCtx, bool Internal);
2420  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
2421  bool Rediscoverable);
2422  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
2423 };
2424 
2425 inline bool Decl::isTemplateParameter() const {
2426  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
2427  getKind() == TemplateTemplateParm;
2428 }
2429 
2430 // Specialization selected when ToTy is not a known subclass of DeclContext.
2431 template <class ToTy,
2432  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
2434  static const ToTy *doit(const DeclContext *Val) {
2435  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
2436  }
2437 
2438  static ToTy *doit(DeclContext *Val) {
2439  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
2440  }
2441 };
2442 
2443 // Specialization selected when ToTy is a known subclass of DeclContext.
2444 template <class ToTy>
2446  static const ToTy *doit(const DeclContext *Val) {
2447  return static_cast<const ToTy*>(Val);
2448  }
2449 
2450  static ToTy *doit(DeclContext *Val) {
2451  return static_cast<ToTy*>(Val);
2452  }
2453 };
2454 
2455 } // namespace clang
2456 
2457 namespace llvm {
2458 
2459 /// isa<T>(DeclContext*)
2460 template <typename To>
2461 struct isa_impl<To, ::clang::DeclContext> {
2462  static bool doit(const ::clang::DeclContext &Val) {
2463  return To::classofKind(Val.getDeclKind());
2464  }
2465 };
2466 
2467 /// cast<T>(DeclContext*)
2468 template<class ToTy>
2469 struct cast_convert_val<ToTy,
2470  const ::clang::DeclContext,const ::clang::DeclContext> {
2471  static const ToTy &doit(const ::clang::DeclContext &Val) {
2473  }
2474 };
2475 
2476 template<class ToTy>
2477 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2478  static ToTy &doit(::clang::DeclContext &Val) {
2480  }
2481 };
2482 
2483 template<class ToTy>
2484 struct cast_convert_val<ToTy,
2485  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2486  static const ToTy *doit(const ::clang::DeclContext *Val) {
2487  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2488  }
2489 };
2490 
2491 template<class ToTy>
2492 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2493  static ToTy *doit(::clang::DeclContext *Val) {
2494  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2495  }
2496 };
2497 
2498 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2499 template<class FromTy>
2500 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2501  static ::clang::DeclContext &doit(const FromTy &Val) {
2502  return *FromTy::castToDeclContext(&Val);
2503  }
2504 };
2505 
2506 template<class FromTy>
2507 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2508  static ::clang::DeclContext *doit(const FromTy *Val) {
2509  return FromTy::castToDeclContext(Val);
2510  }
2511 };
2512 
2513 template<class FromTy>
2514 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2515  static const ::clang::DeclContext &doit(const FromTy &Val) {
2516  return *FromTy::castToDeclContext(&Val);
2517  }
2518 };
2519 
2520 template<class FromTy>
2521 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2522  static const ::clang::DeclContext *doit(const FromTy *Val) {
2523  return FromTy::castToDeclContext(Val);
2524  }
2525 };
2526 
2527 } // namespace llvm
2528 
2529 #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:959
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:2352
specific_decl_iterator & operator++()
Definition: DeclBase.h:2063
void setImplicit(bool I=true)
Definition: DeclBase.h:550
Represents a function declaration or definition.
Definition: Decl.h:1737
redecl_iterator operator++(int)
Definition: DeclBase.h:924
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:873
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:2011
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:939
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:889
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:754
const char * getDeclKindName() const
Definition: DeclBase.cpp:122
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:242
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c.h:67
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:870
bool isClosure() const
Definition: DeclBase.h:1788
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:1816
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:981
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:477
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:29
Module * getOwningModuleForLinkage(bool IgnoreLinkage=false) const
Get the module that owns this declaration for linkage purposes.
Definition: Decl.cpp:1480
attr_iterator attr_begin() const
Definition: DeclBase.h:496
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:520
Stmt - This represents one statement.
Definition: Stmt.h:65
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3360
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:333
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:34
friend bool operator==(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2075
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:412
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:2054
static void add(Kind k)
Definition: DeclBase.cpp:192
Not a friend object.
Definition: DeclBase.h:1097
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:955
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2462
bool isObjCContainer() const
Definition: DeclBase.h:1790
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:416
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:97
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:2341
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2438
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:2327
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:2096
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:794
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2491
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:253
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:323
redecl_iterator & operator++()
Definition: DeclBase.h:915
reference back() const
Definition: DeclBase.h:1237
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:216
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:749
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:379
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:2000
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:118
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:138
reference front() const
Definition: DeclBase.h:1236
bool isInvalidDecl() const
Definition: DeclBase.h:544
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2080
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:449
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:37
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:210
BlockDeclBitfields BlockDeclBits
Definition: DeclBase.h:1701
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:733
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
Decl(Kind DK, EmptyShell Empty)
Definition: DeclBase.h:380
value_type operator->() const
Definition: DeclBase.h:1974
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:130
bool isLexicallyWithinFunctionOrMethod() const
Returns true if this declaration lexically is inside a function.
Definition: DeclBase.cpp:334
Represents a struct/union/class.
Definition: Decl.h:3592
CXXConstructorDeclBitfields CXXConstructorDeclBits
Definition: DeclBase.h:1697
void dumpColor() const
Definition: ASTDumper.cpp:234
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:84
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:2321
void print(raw_ostream &Out, unsigned Indentation=0, bool PrintInstantiation=false) const
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:346
LinkageSpecDeclBitfields LinkageSpecDeclBits
Definition: DeclBase.h:1700
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:1189
attr_iterator attr_end() const
Definition: DeclBase.h:499
specific_decl_iterator operator++(int)
Definition: DeclBase.h:2069
friend class DeclContext
Definition: DeclBase.h:245
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1996
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:906
This declaration is a friend function.
Definition: DeclBase.h:152
bool isNamespace() const
Definition: DeclBase.h:1835
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:775
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:408
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:625
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:850
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:798
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1875
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:326
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:207
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:525
Describes a module or submodule.
Definition: Module.h:64
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;deprecated&#39;.
Definition: DeclBase.h:666
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2156
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1218
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:968
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:421
Namespaces, declared with &#39;namespace foo {}&#39;.
Definition: DeclBase.h:140
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:804
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:828
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:781
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1965
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:2132
static bool isStdNamespace(const DeclContext *DC)
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1099
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2042
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1241
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:2300
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1160
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:823
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2041
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:117
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:741
Represents a linkage specification.
Definition: DeclCXX.h:2833
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2508
bool isExported() const
Whether this declaration is exported (by virtue of being lexically within an ExportDecl or by being a...
Definition: DeclBase.cpp:433
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:893
Ordinary names.
Definition: DeclBase.h:144
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:398
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:872
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:72
NodeId Parent
Definition: ASTDiff.cpp:191
Decl * getNextDeclInContext()
Definition: DeclBase.h:426
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:654
bool hasAttr() const
Definition: DeclBase.h:533
DeclContextBitfields DeclContextBits
Definition: DeclBase.h:1691
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:102
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:588
This declaration is a C++ operator declared in a non-class context.
Definition: DeclBase.h:168
Objective C @protocol.
Definition: DeclBase.h:147
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2281
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2008
std::ptrdiff_t difference_type
Definition: DeclBase.h:907
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1780
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:963
This declaration is a friend class.
Definition: DeclBase.h:157
const Decl * getNonClosureContext() const
Definition: DeclBase.h:444
int64_t getID() const
Definition: DeclBase.cpp:959
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1771
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:878
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3857
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:474
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:2251
static bool classofKind(Kind K)
Definition: DeclBase.h:1122
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:703
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:2308
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
This declaration is an OpenMP user defined reduction construction.
Definition: DeclBase.h:178
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:549
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:724
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:970
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1202
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:427
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1055
bool isFileContext() const
Definition: DeclBase.h:1821
DeclContext * getDeclContext()
Definition: DeclBase.h:429
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:951
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2425
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:200
This declaration is an OpenMP user defined mapper.
Definition: DeclBase.h:181
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:616
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:490
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
const DeclContext * getParent() const
Definition: DeclBase.h:1758
bool isFunctionOrMethod() const
Definition: DeclBase.h:1803
reference operator[](size_t N) const
Definition: DeclBase.h:1238
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:383
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1755
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:421
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1027
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1995
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:329
const SourceManager & SM
Definition: Format.cpp:1489
FunctionDeclBitfields FunctionDeclBits
Definition: DeclBase.h:1696
const DeclContext * getDeclContext() const
Definition: DeclBase.h:434
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:294
reference operator*() const
Definition: DeclBase.h:912
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1106
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:808
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2333
AttrVec & getAttrs()
Definition: DeclBase.h:481
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:987
bool hasAttrs() const
Definition: DeclBase.h:475
filtered_decl_iterator & operator++()
Definition: DeclBase.h:2139
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2522
iterator::reference reference
Definition: DeclBase.h:1228
Abstract interface for external sources of AST nodes.
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:225
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1748
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:897
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:217
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:640
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:588
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:136
all_lookups_iterator - An iterator that provides a view over the results of looking up every possible...
Definition: DeclLookups.h:28
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:786
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:102
The nullability qualifier is set when the nullability of the result or parameter was expressed via a ...
Definition: DeclBase.h:210
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3063
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:375
void setReferenced(bool R=true)
Definition: DeclBase.h:579
static bool classof(const DeclContext *D)
Definition: DeclBase.h:2357
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2120
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:2276
bool hasCachedLinkage() const
Definition: DeclBase.h:402
A friend of a previously-declared entity.
Definition: DeclBase.h:1098
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1204
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:2315
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2501
Linkage getCachedLinkage() const
Definition: DeclBase.h:394
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:697
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:930
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:2288
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:396
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:885
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2450
decl_iterator noload_decls_end() const
Definition: DeclBase.h:2012
void dropAttrs()
Definition: DeclBase.cpp:835
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c.h:75
virtual bool isOutOfLine() const
Determine whether this declaration is declared out of line (outside its semantic context).
Definition: Decl.cpp:98
bool isWeakImported() const
Determine whether this is a weak-imported symbol.
Definition: DeclBase.cpp:684
Defines various enumerations that describe declaration and type specifiers.
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1957
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:577
redecl_iterator redecls_begin() const
Definition: DeclBase.h:947
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:943
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2434
Dataflow Directional Tag Classes.
void updateOutOfDate(IdentifierInfo &II) const
Update a potentially out-of-date declaration.
Definition: DeclBase.cpp:62
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1265
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:398
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:584
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:974
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1013
bool isRecord() const
Definition: DeclBase.h:1830
attr_range attrs() const
Definition: DeclBase.h:492
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:934
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:354
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:489
AccessSpecifier getAccess() const
Definition: DeclBase.h:464
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:115
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:423
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:1001
decl_iterator operator++(int)
Definition: DeclBase.h:1981
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1887
Represents an enum.
Definition: Decl.h:3325
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:125
EnumDeclBitfields EnumDeclBits
Definition: DeclBase.h:1693
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:769
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:2020
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:1066
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:1037
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1918
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:564
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:1115
T * getAttr() const
Definition: DeclBase.h:529
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:709
virtual ~Decl()
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:2145
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1774
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:701
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1227
ObjCMethodDeclBitfields ObjCMethodDeclBits
Definition: DeclBase.h:1698
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:411
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:515
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2515
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:964
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2151
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:198
decl_iterator & operator++()
Definition: DeclBase.h:1976
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1179
bool setUseQualifiedLookup(bool use=true) const
Definition: DeclBase.h:2346
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1912
value_type operator->() const
Definition: DeclBase.h:913
RecordDeclBitfields RecordDeclBits
Definition: DeclBase.h:1694
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1898
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:370
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:889
void addAttr(Attr *A)
Definition: DeclBase.cpp:842
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:103
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2446
friend class CXXClassMemberWrapper
Definition: DeclBase.h:317
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1784
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:89
void dump() const
Definition: ASTDumper.cpp:223
The top declaration context.
Definition: Decl.h:107
static void PrintStats()
Definition: DeclBase.cpp:168
This declaration is a function-local extern declaration of a variable or function.
Definition: DeclBase.h:175
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1160
static void EnableStatistics()
Definition: DeclBase.cpp:164
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1987
ObjCContainerDeclBitfields ObjCContainerDeclBits
Definition: DeclBase.h:1699
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:471
#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:598
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:298
OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits
Definition: DeclBase.h:1695
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1826
void dropAttr()
Definition: DeclBase.h:504
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:459
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:449
TemplateDecl * getDescribedTemplate() const
If this is a declaration that describes some template, this method returns that template declaration...
Definition: DeclBase.cpp:229
Represents C++ using-directive.
Definition: DeclCXX.h:2923
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:470
bool isInStdNamespace() const
Definition: DeclBase.cpp:356
SourceLocation getBegin() const
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:360
bool isTemplated() const
Determine whether this declaration is a templated entity (whether it is.
Definition: DeclBase.cpp:242
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:908
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:420
TagDeclBitfields TagDeclBits
Definition: DeclBase.h:1692
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1991
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1906
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:675
decl_iterator decls_end() const
Definition: DeclBase.h:2002
This declaration is a using declaration.
Definition: DeclBase.h:163
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2119
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:866
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1172