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DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the Decl and DeclContext interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_AST_DECLBASE_H
15 #define LLVM_CLANG_AST_DECLBASE_H
16 
17 #include "clang/AST/AttrIterator.h"
20 #include "clang/Basic/LLVM.h"
22 #include "clang/Basic/Specifiers.h"
23 #include "llvm/ADT/ArrayRef.h"
24 #include "llvm/ADT/PointerIntPair.h"
25 #include "llvm/ADT/PointerUnion.h"
26 #include "llvm/ADT/iterator.h"
27 #include "llvm/ADT/iterator_range.h"
28 #include "llvm/Support/Casting.h"
29 #include "llvm/Support/Compiler.h"
30 #include "llvm/Support/PrettyStackTrace.h"
31 #include "llvm/Support/VersionTuple.h"
32 #include <algorithm>
33 #include <cassert>
34 #include <cstddef>
35 #include <iterator>
36 #include <string>
37 #include <type_traits>
38 #include <utility>
39 
40 namespace clang {
41 
42 class ASTContext;
43 class ASTMutationListener;
44 class Attr;
45 class DeclContext;
46 class ExternalSourceSymbolAttr;
47 class FunctionDecl;
48 class FunctionType;
49 class IdentifierInfo;
50 enum Linkage : unsigned char;
51 class LinkageSpecDecl;
52 class Module;
53 class NamedDecl;
54 class ObjCCategoryDecl;
55 class ObjCCategoryImplDecl;
56 class ObjCContainerDecl;
57 class ObjCImplDecl;
58 class ObjCImplementationDecl;
59 class ObjCInterfaceDecl;
60 class ObjCMethodDecl;
61 class ObjCProtocolDecl;
62 struct PrintingPolicy;
63 class RecordDecl;
64 class SourceManager;
65 class Stmt;
66 class StoredDeclsMap;
67 class TemplateDecl;
68 class TranslationUnitDecl;
69 class UsingDirectiveDecl;
70 
71 /// Captures the result of checking the availability of a
72 /// declaration.
78 };
79 
80 /// Decl - This represents one declaration (or definition), e.g. a variable,
81 /// typedef, function, struct, etc.
82 ///
83 /// Note: There are objects tacked on before the *beginning* of Decl
84 /// (and its subclasses) in its Decl::operator new(). Proper alignment
85 /// of all subclasses (not requiring more than the alignment of Decl) is
86 /// asserted in DeclBase.cpp.
87 class alignas(8) Decl {
88 public:
89  /// Lists the kind of concrete classes of Decl.
90  enum Kind {
91 #define DECL(DERIVED, BASE) DERIVED,
92 #define ABSTRACT_DECL(DECL)
93 #define DECL_RANGE(BASE, START, END) \
94  first##BASE = START, last##BASE = END,
95 #define LAST_DECL_RANGE(BASE, START, END) \
96  first##BASE = START, last##BASE = END
97 #include "clang/AST/DeclNodes.inc"
98  };
99 
100  /// A placeholder type used to construct an empty shell of a
101  /// decl-derived type that will be filled in later (e.g., by some
102  /// deserialization method).
103  struct EmptyShell {};
104 
105  /// IdentifierNamespace - The different namespaces in which
106  /// declarations may appear. According to C99 6.2.3, there are
107  /// four namespaces, labels, tags, members and ordinary
108  /// identifiers. C++ describes lookup completely differently:
109  /// certain lookups merely "ignore" certain kinds of declarations,
110  /// usually based on whether the declaration is of a type, etc.
111  ///
112  /// These are meant as bitmasks, so that searches in
113  /// C++ can look into the "tag" namespace during ordinary lookup.
114  ///
115  /// Decl currently provides 15 bits of IDNS bits.
117  /// Labels, declared with 'x:' and referenced with 'goto x'.
118  IDNS_Label = 0x0001,
119 
120  /// Tags, declared with 'struct foo;' and referenced with
121  /// 'struct foo'. All tags are also types. This is what
122  /// elaborated-type-specifiers look for in C.
123  /// This also contains names that conflict with tags in the
124  /// same scope but that are otherwise ordinary names (non-type
125  /// template parameters and indirect field declarations).
126  IDNS_Tag = 0x0002,
127 
128  /// Types, declared with 'struct foo', typedefs, etc.
129  /// This is what elaborated-type-specifiers look for in C++,
130  /// but note that it's ill-formed to find a non-tag.
131  IDNS_Type = 0x0004,
132 
133  /// Members, declared with object declarations within tag
134  /// definitions. In C, these can only be found by "qualified"
135  /// lookup in member expressions. In C++, they're found by
136  /// normal lookup.
137  IDNS_Member = 0x0008,
138 
139  /// Namespaces, declared with 'namespace foo {}'.
140  /// Lookup for nested-name-specifiers find these.
141  IDNS_Namespace = 0x0010,
142 
143  /// Ordinary names. In C, everything that's not a label, tag,
144  /// member, or function-local extern ends up here.
145  IDNS_Ordinary = 0x0020,
146 
147  /// Objective C \@protocol.
149 
150  /// This declaration is a friend function. A friend function
151  /// declaration is always in this namespace but may also be in
152  /// IDNS_Ordinary if it was previously declared.
154 
155  /// This declaration is a friend class. A friend class
156  /// declaration is always in this namespace but may also be in
157  /// IDNS_Tag|IDNS_Type if it was previously declared.
158  IDNS_TagFriend = 0x0100,
159 
160  /// This declaration is a using declaration. A using declaration
161  /// *introduces* a number of other declarations into the current
162  /// scope, and those declarations use the IDNS of their targets,
163  /// but the actual using declarations go in this namespace.
164  IDNS_Using = 0x0200,
165 
166  /// This declaration is a C++ operator declared in a non-class
167  /// context. All such operators are also in IDNS_Ordinary.
168  /// C++ lexical operator lookup looks for these.
170 
171  /// This declaration is a function-local extern declaration of a
172  /// variable or function. This may also be IDNS_Ordinary if it
173  /// has been declared outside any function. These act mostly like
174  /// invisible friend declarations, but are also visible to unqualified
175  /// lookup within the scope of the declaring function.
177 
178  /// This declaration is an OpenMP user defined reduction construction.
180  };
181 
182  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
183  /// parameter types in method declarations. Other than remembering
184  /// them and mangling them into the method's signature string, these
185  /// are ignored by the compiler; they are consumed by certain
186  /// remote-messaging frameworks.
187  ///
188  /// in, inout, and out are mutually exclusive and apply only to
189  /// method parameters. bycopy and byref are mutually exclusive and
190  /// apply only to method parameters (?). oneway applies only to
191  /// results. All of these expect their corresponding parameter to
192  /// have a particular type. None of this is currently enforced by
193  /// clang.
194  ///
195  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
198  OBJC_TQ_In = 0x1,
200  OBJC_TQ_Out = 0x4,
204 
205  /// The nullability qualifier is set when the nullability of the
206  /// result or parameter was expressed via a context-sensitive
207  /// keyword.
209  };
210 
211  /// The kind of ownership a declaration has, for visibility purposes.
212  /// This enumeration is designed such that higher values represent higher
213  /// levels of name hiding.
214  enum class ModuleOwnershipKind : unsigned {
215  /// This declaration is not owned by a module.
216  Unowned,
217 
218  /// This declaration has an owning module, but is globally visible
219  /// (typically because its owning module is visible and we know that
220  /// modules cannot later become hidden in this compilation).
221  /// After serialization and deserialization, this will be converted
222  /// to VisibleWhenImported.
223  Visible,
224 
225  /// This declaration has an owning module, and is visible when that
226  /// module is imported.
227  VisibleWhenImported,
228 
229  /// This declaration has an owning module, but is only visible to
230  /// lookups that occur within that module.
231  ModulePrivate
232  };
233 
234 protected:
235  /// The next declaration within the same lexical
236  /// DeclContext. These pointers form the linked list that is
237  /// traversed via DeclContext's decls_begin()/decls_end().
238  ///
239  /// The extra two bits are used for the ModuleOwnershipKind.
240  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
241 
242 private:
243  friend class DeclContext;
244 
245  struct MultipleDC {
246  DeclContext *SemanticDC;
247  DeclContext *LexicalDC;
248  };
249 
250  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
251  /// For declarations that don't contain C++ scope specifiers, it contains
252  /// the DeclContext where the Decl was declared.
253  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
254  /// with the context where it semantically belongs (SemanticDC) and the
255  /// context where it was lexically declared (LexicalDC).
256  /// e.g.:
257  ///
258  /// namespace A {
259  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
260  /// }
261  /// void A::f(); // SemanticDC == namespace 'A'
262  /// // LexicalDC == global namespace
263  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
264 
265  bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
266  bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
267 
268  MultipleDC *getMultipleDC() const {
269  return DeclCtx.get<MultipleDC*>();
270  }
271 
272  DeclContext *getSemanticDC() const {
273  return DeclCtx.get<DeclContext*>();
274  }
275 
276  /// Loc - The location of this decl.
277  SourceLocation Loc;
278 
279  /// DeclKind - This indicates which class this is.
280  unsigned DeclKind : 7;
281 
282  /// InvalidDecl - This indicates a semantic error occurred.
283  unsigned InvalidDecl : 1;
284 
285  /// HasAttrs - This indicates whether the decl has attributes or not.
286  unsigned HasAttrs : 1;
287 
288  /// Implicit - Whether this declaration was implicitly generated by
289  /// the implementation rather than explicitly written by the user.
290  unsigned Implicit : 1;
291 
292  /// Whether this declaration was "used", meaning that a definition is
293  /// required.
294  unsigned Used : 1;
295 
296  /// Whether this declaration was "referenced".
297  /// The difference with 'Used' is whether the reference appears in a
298  /// evaluated context or not, e.g. functions used in uninstantiated templates
299  /// are regarded as "referenced" but not "used".
300  unsigned Referenced : 1;
301 
302  /// Whether this declaration is a top-level declaration (function,
303  /// global variable, etc.) that is lexically inside an objc container
304  /// definition.
305  unsigned TopLevelDeclInObjCContainer : 1;
306 
307  /// Whether statistic collection is enabled.
308  static bool StatisticsEnabled;
309 
310 protected:
311  friend class ASTDeclReader;
312  friend class ASTDeclWriter;
313  friend class ASTNodeImporter;
314  friend class ASTReader;
315  friend class CXXClassMemberWrapper;
316  friend class LinkageComputer;
317  template<typename decl_type> friend class Redeclarable;
318 
319  /// Access - Used by C++ decls for the access specifier.
320  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
321  unsigned Access : 2;
322 
323  /// Whether this declaration was loaded from an AST file.
324  unsigned FromASTFile : 1;
325 
326  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
327  unsigned IdentifierNamespace : 13;
328 
329  /// If 0, we have not computed the linkage of this declaration.
330  /// Otherwise, it is the linkage + 1.
331  mutable unsigned CacheValidAndLinkage : 3;
332 
333  /// Allocate memory for a deserialized declaration.
334  ///
335  /// This routine must be used to allocate memory for any declaration that is
336  /// deserialized from a module file.
337  ///
338  /// \param Size The size of the allocated object.
339  /// \param Ctx The context in which we will allocate memory.
340  /// \param ID The global ID of the deserialized declaration.
341  /// \param Extra The amount of extra space to allocate after the object.
342  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
343  std::size_t Extra = 0);
344 
345  /// Allocate memory for a non-deserialized declaration.
346  void *operator new(std::size_t Size, const ASTContext &Ctx,
347  DeclContext *Parent, std::size_t Extra = 0);
348 
349 private:
350  bool AccessDeclContextSanity() const;
351 
352  /// Get the module ownership kind to use for a local lexical child of \p DC,
353  /// which may be either a local or (rarely) an imported declaration.
354  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
355  if (DC) {
356  auto *D = cast<Decl>(DC);
357  auto MOK = D->getModuleOwnershipKind();
358  if (MOK != ModuleOwnershipKind::Unowned &&
359  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
360  return MOK;
361  // If D is not local and we have no local module storage, then we don't
362  // need to track module ownership at all.
363  }
365  }
366 
367 protected:
369  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
370  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false),
371  Implicit(false), Used(false), Referenced(false),
372  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
375  if (StatisticsEnabled) add(DK);
376  }
377 
378  Decl(Kind DK, EmptyShell Empty)
379  : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
380  Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
384  if (StatisticsEnabled) add(DK);
385  }
386 
387  virtual ~Decl();
388 
389  /// Update a potentially out-of-date declaration.
390  void updateOutOfDate(IdentifierInfo &II) const;
391 
393  return Linkage(CacheValidAndLinkage - 1);
394  }
395 
396  void setCachedLinkage(Linkage L) const {
397  CacheValidAndLinkage = L + 1;
398  }
399 
400  bool hasCachedLinkage() const {
401  return CacheValidAndLinkage;
402  }
403 
404 public:
405  /// Source range that this declaration covers.
406  virtual SourceRange getSourceRange() const LLVM_READONLY {
407  return SourceRange(getLocation(), getLocation());
408  }
409 
410  SourceLocation getBeginLoc() const LLVM_READONLY {
411  return getSourceRange().getBegin();
412  }
413 
414  SourceLocation getEndLoc() const LLVM_READONLY {
415  return getSourceRange().getEnd();
416  }
417 
418  SourceLocation getLocation() const { return Loc; }
419  void setLocation(SourceLocation L) { Loc = L; }
420 
421  Kind getKind() const { return static_cast<Kind>(DeclKind); }
422  const char *getDeclKindName() const;
423 
424  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
425  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
426 
428  if (isInSemaDC())
429  return getSemanticDC();
430  return getMultipleDC()->SemanticDC;
431  }
432  const DeclContext *getDeclContext() const {
433  return const_cast<Decl*>(this)->getDeclContext();
434  }
435 
436  /// Find the innermost non-closure ancestor of this declaration,
437  /// walking up through blocks, lambdas, etc. If that ancestor is
438  /// not a code context (!isFunctionOrMethod()), returns null.
439  ///
440  /// A declaration may be its own non-closure context.
442  const Decl *getNonClosureContext() const {
443  return const_cast<Decl*>(this)->getNonClosureContext();
444  }
445 
448  return const_cast<Decl*>(this)->getTranslationUnitDecl();
449  }
450 
451  bool isInAnonymousNamespace() const;
452 
453  bool isInStdNamespace() const;
454 
455  ASTContext &getASTContext() const LLVM_READONLY;
456 
458  Access = AS;
459  assert(AccessDeclContextSanity());
460  }
461 
463  assert(AccessDeclContextSanity());
464  return AccessSpecifier(Access);
465  }
466 
467  /// Retrieve the access specifier for this declaration, even though
468  /// it may not yet have been properly set.
470  return AccessSpecifier(Access);
471  }
472 
473  bool hasAttrs() const { return HasAttrs; }
474 
475  void setAttrs(const AttrVec& Attrs) {
476  return setAttrsImpl(Attrs, getASTContext());
477  }
478 
480  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
481  }
482 
483  const AttrVec &getAttrs() const;
484  void dropAttrs();
485  void addAttr(Attr *A);
486 
487  using attr_iterator = AttrVec::const_iterator;
488  using attr_range = llvm::iterator_range<attr_iterator>;
489 
490  attr_range attrs() const {
491  return attr_range(attr_begin(), attr_end());
492  }
493 
495  return hasAttrs() ? getAttrs().begin() : nullptr;
496  }
498  return hasAttrs() ? getAttrs().end() : nullptr;
499  }
500 
501  template <typename T>
502  void dropAttr() {
503  if (!HasAttrs) return;
504 
505  AttrVec &Vec = getAttrs();
506  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
507 
508  if (Vec.empty())
509  HasAttrs = false;
510  }
511 
512  template <typename T>
513  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
514  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
515  }
516 
517  template <typename T>
520  }
521 
522  template <typename T>
525  }
526 
527  template<typename T> T *getAttr() const {
528  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
529  }
530 
531  template<typename T> bool hasAttr() const {
532  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
533  }
534 
535  /// getMaxAlignment - return the maximum alignment specified by attributes
536  /// on this decl, 0 if there are none.
537  unsigned getMaxAlignment() const;
538 
539  /// setInvalidDecl - Indicates the Decl had a semantic error. This
540  /// allows for graceful error recovery.
541  void setInvalidDecl(bool Invalid = true);
542  bool isInvalidDecl() const { return (bool) InvalidDecl; }
543 
544  /// isImplicit - Indicates whether the declaration was implicitly
545  /// generated by the implementation. If false, this declaration
546  /// was written explicitly in the source code.
547  bool isImplicit() const { return Implicit; }
548  void setImplicit(bool I = true) { Implicit = I; }
549 
550  /// Whether *any* (re-)declaration of the entity was used, meaning that
551  /// a definition is required.
552  ///
553  /// \param CheckUsedAttr When true, also consider the "used" attribute
554  /// (in addition to the "used" bit set by \c setUsed()) when determining
555  /// whether the function is used.
556  bool isUsed(bool CheckUsedAttr = true) const;
557 
558  /// Set whether the declaration is used, in the sense of odr-use.
559  ///
560  /// This should only be used immediately after creating a declaration.
561  /// It intentionally doesn't notify any listeners.
562  void setIsUsed() { getCanonicalDecl()->Used = true; }
563 
564  /// Mark the declaration used, in the sense of odr-use.
565  ///
566  /// This notifies any mutation listeners in addition to setting a bit
567  /// indicating the declaration is used.
568  void markUsed(ASTContext &C);
569 
570  /// Whether any declaration of this entity was referenced.
571  bool isReferenced() const;
572 
573  /// Whether this declaration was referenced. This should not be relied
574  /// upon for anything other than debugging.
575  bool isThisDeclarationReferenced() const { return Referenced; }
576 
577  void setReferenced(bool R = true) { Referenced = R; }
578 
579  /// Whether this declaration is a top-level declaration (function,
580  /// global variable, etc.) that is lexically inside an objc container
581  /// definition.
583  return TopLevelDeclInObjCContainer;
584  }
585 
586  void setTopLevelDeclInObjCContainer(bool V = true) {
587  TopLevelDeclInObjCContainer = V;
588  }
589 
590  /// Looks on this and related declarations for an applicable
591  /// external source symbol attribute.
592  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
593 
594  /// Whether this declaration was marked as being private to the
595  /// module in which it was defined.
596  bool isModulePrivate() const {
598  }
599 
600  /// Whether this declaration is exported (by virtue of being lexically
601  /// within an ExportDecl or by being a NamespaceDecl).
602  bool isExported() const;
603 
604  /// Return true if this declaration has an attribute which acts as
605  /// definition of the entity, such as 'alias' or 'ifunc'.
606  bool hasDefiningAttr() const;
607 
608  /// Return this declaration's defining attribute if it has one.
609  const Attr *getDefiningAttr() const;
610 
611 protected:
612  /// Specify that this declaration was marked as being private
613  /// to the module in which it was defined.
615  // The module-private specifier has no effect on unowned declarations.
616  // FIXME: We should track this in some way for source fidelity.
618  return;
620  }
621 
622  /// Set the owning module ID.
623  void setOwningModuleID(unsigned ID) {
624  assert(isFromASTFile() && "Only works on a deserialized declaration");
625  *((unsigned*)this - 2) = ID;
626  }
627 
628 public:
629  /// Determine the availability of the given declaration.
630  ///
631  /// This routine will determine the most restrictive availability of
632  /// the given declaration (e.g., preferring 'unavailable' to
633  /// 'deprecated').
634  ///
635  /// \param Message If non-NULL and the result is not \c
636  /// AR_Available, will be set to a (possibly empty) message
637  /// describing why the declaration has not been introduced, is
638  /// deprecated, or is unavailable.
639  ///
640  /// \param EnclosingVersion The version to compare with. If empty, assume the
641  /// deployment target version.
642  ///
643  /// \param RealizedPlatform If non-NULL and the availability result is found
644  /// in an available attribute it will set to the platform which is written in
645  /// the available attribute.
647  getAvailability(std::string *Message = nullptr,
648  VersionTuple EnclosingVersion = VersionTuple(),
649  StringRef *RealizedPlatform = nullptr) const;
650 
651  /// Retrieve the version of the target platform in which this
652  /// declaration was introduced.
653  ///
654  /// \returns An empty version tuple if this declaration has no 'introduced'
655  /// availability attributes, or the version tuple that's specified in the
656  /// attribute otherwise.
657  VersionTuple getVersionIntroduced() const;
658 
659  /// Determine whether this declaration is marked 'deprecated'.
660  ///
661  /// \param Message If non-NULL and the declaration is deprecated,
662  /// this will be set to the message describing why the declaration
663  /// was deprecated (which may be empty).
664  bool isDeprecated(std::string *Message = nullptr) const {
665  return getAvailability(Message) == AR_Deprecated;
666  }
667 
668  /// Determine whether this declaration is marked 'unavailable'.
669  ///
670  /// \param Message If non-NULL and the declaration is unavailable,
671  /// this will be set to the message describing why the declaration
672  /// was made unavailable (which may be empty).
673  bool isUnavailable(std::string *Message = nullptr) const {
674  return getAvailability(Message) == AR_Unavailable;
675  }
676 
677  /// Determine whether this is a weak-imported symbol.
678  ///
679  /// Weak-imported symbols are typically marked with the
680  /// 'weak_import' attribute, but may also be marked with an
681  /// 'availability' attribute where we're targing a platform prior to
682  /// the introduction of this feature.
683  bool isWeakImported() const;
684 
685  /// Determines whether this symbol can be weak-imported,
686  /// e.g., whether it would be well-formed to add the weak_import
687  /// attribute.
688  ///
689  /// \param IsDefinition Set to \c true to indicate that this
690  /// declaration cannot be weak-imported because it has a definition.
691  bool canBeWeakImported(bool &IsDefinition) const;
692 
693  /// Determine whether this declaration came from an AST file (such as
694  /// a precompiled header or module) rather than having been parsed.
695  bool isFromASTFile() const { return FromASTFile; }
696 
697  /// Retrieve the global declaration ID associated with this
698  /// declaration, which specifies where this Decl was loaded from.
699  unsigned getGlobalID() const {
700  if (isFromASTFile())
701  return *((const unsigned*)this - 1);
702  return 0;
703  }
704 
705  /// Retrieve the global ID of the module that owns this particular
706  /// declaration.
707  unsigned getOwningModuleID() const {
708  if (isFromASTFile())
709  return *((const unsigned*)this - 2);
710  return 0;
711  }
712 
713 private:
714  Module *getOwningModuleSlow() const;
715 
716 protected:
717  bool hasLocalOwningModuleStorage() const;
718 
719 public:
720  /// Get the imported owning module, if this decl is from an imported
721  /// (non-local) module.
723  if (!isFromASTFile() || !hasOwningModule())
724  return nullptr;
725 
726  return getOwningModuleSlow();
727  }
728 
729  /// Get the local owning module, if known. Returns nullptr if owner is
730  /// not yet known or declaration is not from a module.
732  if (isFromASTFile() || !hasOwningModule())
733  return nullptr;
734 
735  assert(hasLocalOwningModuleStorage() &&
736  "owned local decl but no local module storage");
737  return reinterpret_cast<Module *const *>(this)[-1];
738  }
740  assert(!isFromASTFile() && hasOwningModule() &&
742  "should not have a cached owning module");
743  reinterpret_cast<Module **>(this)[-1] = M;
744  }
745 
746  /// Is this declaration owned by some module?
747  bool hasOwningModule() const {
749  }
750 
751  /// Get the module that owns this declaration (for visibility purposes).
754  }
755 
756  /// Get the module that owns this declaration for linkage purposes.
757  /// There only ever is such a module under the C++ Modules TS.
758  ///
759  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
760  /// all declarations in a global module fragment are unowned.
761  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
762 
763  /// Determine whether this declaration might be hidden from name
764  /// lookup. Note that the declaration might be visible even if this returns
765  /// \c false, if the owning module is visible within the query context.
766  // FIXME: Rename this to make it clearer what it does.
767  bool isHidden() const {
769  }
770 
771  /// Set that this declaration is globally visible, even if it came from a
772  /// module that is not visible.
774  if (isHidden())
776  }
777 
778  /// Get the kind of module ownership for this declaration.
780  return NextInContextAndBits.getInt();
781  }
782 
783  /// Set whether this declaration is hidden from name lookup.
788  "no storage available for owning module for this declaration");
789  NextInContextAndBits.setInt(MOK);
790  }
791 
792  unsigned getIdentifierNamespace() const {
793  return IdentifierNamespace;
794  }
795 
796  bool isInIdentifierNamespace(unsigned NS) const {
797  return getIdentifierNamespace() & NS;
798  }
799 
800  static unsigned getIdentifierNamespaceForKind(Kind DK);
801 
804  }
805 
806  static bool isTagIdentifierNamespace(unsigned NS) {
807  // TagDecls have Tag and Type set and may also have TagFriend.
808  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
809  }
810 
811  /// getLexicalDeclContext - The declaration context where this Decl was
812  /// lexically declared (LexicalDC). May be different from
813  /// getDeclContext() (SemanticDC).
814  /// e.g.:
815  ///
816  /// namespace A {
817  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
818  /// }
819  /// void A::f(); // SemanticDC == namespace 'A'
820  /// // LexicalDC == global namespace
822  if (isInSemaDC())
823  return getSemanticDC();
824  return getMultipleDC()->LexicalDC;
825  }
827  return const_cast<Decl*>(this)->getLexicalDeclContext();
828  }
829 
830  /// Determine whether this declaration is declared out of line (outside its
831  /// semantic context).
832  virtual bool isOutOfLine() const;
833 
834  /// setDeclContext - Set both the semantic and lexical DeclContext
835  /// to DC.
836  void setDeclContext(DeclContext *DC);
837 
839 
840  /// Determine whether this declaration is a templated entity (whether it is
841  // within the scope of a template parameter).
842  bool isTemplated() const;
843 
844  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
845  /// scoped decl is defined outside the current function or method. This is
846  /// roughly global variables and functions, but also handles enums (which
847  /// could be defined inside or outside a function etc).
849  return getParentFunctionOrMethod() == nullptr;
850  }
851 
852  /// Returns true if this declaration lexically is inside a function.
853  /// It recognizes non-defining declarations as well as members of local
854  /// classes:
855  /// \code
856  /// void foo() { void bar(); }
857  /// void foo2() { class ABC { void bar(); }; }
858  /// \endcode
860 
861  /// If this decl is defined inside a function/method/block it returns
862  /// the corresponding DeclContext, otherwise it returns null.
863  const DeclContext *getParentFunctionOrMethod() const;
865  return const_cast<DeclContext*>(
866  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
867  }
868 
869  /// Retrieves the "canonical" declaration of the given declaration.
870  virtual Decl *getCanonicalDecl() { return this; }
871  const Decl *getCanonicalDecl() const {
872  return const_cast<Decl*>(this)->getCanonicalDecl();
873  }
874 
875  /// Whether this particular Decl is a canonical one.
876  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
877 
878 protected:
879  /// Returns the next redeclaration or itself if this is the only decl.
880  ///
881  /// Decl subclasses that can be redeclared should override this method so that
882  /// Decl::redecl_iterator can iterate over them.
883  virtual Decl *getNextRedeclarationImpl() { return this; }
884 
885  /// Implementation of getPreviousDecl(), to be overridden by any
886  /// subclass that has a redeclaration chain.
887  virtual Decl *getPreviousDeclImpl() { return nullptr; }
888 
889  /// Implementation of getMostRecentDecl(), to be overridden by any
890  /// subclass that has a redeclaration chain.
891  virtual Decl *getMostRecentDeclImpl() { return this; }
892 
893 public:
894  /// Iterates through all the redeclarations of the same decl.
896  /// Current - The current declaration.
897  Decl *Current = nullptr;
898  Decl *Starter;
899 
900  public:
901  using value_type = Decl *;
902  using reference = const value_type &;
903  using pointer = const value_type *;
904  using iterator_category = std::forward_iterator_tag;
906 
907  redecl_iterator() = default;
908  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
909 
910  reference operator*() const { return Current; }
911  value_type operator->() const { return Current; }
912 
914  assert(Current && "Advancing while iterator has reached end");
915  // Get either previous decl or latest decl.
916  Decl *Next = Current->getNextRedeclarationImpl();
917  assert(Next && "Should return next redeclaration or itself, never null!");
918  Current = (Next != Starter) ? Next : nullptr;
919  return *this;
920  }
921 
923  redecl_iterator tmp(*this);
924  ++(*this);
925  return tmp;
926  }
927 
929  return x.Current == y.Current;
930  }
931 
933  return x.Current != y.Current;
934  }
935  };
936 
937  using redecl_range = llvm::iterator_range<redecl_iterator>;
938 
939  /// Returns an iterator range for all the redeclarations of the same
940  /// decl. It will iterate at least once (when this decl is the only one).
943  }
944 
946  return redecl_iterator(const_cast<Decl *>(this));
947  }
948 
950 
951  /// Retrieve the previous declaration that declares the same entity
952  /// as this declaration, or NULL if there is no previous declaration.
954 
955  /// Retrieve the most recent declaration that declares the same entity
956  /// as this declaration, or NULL if there is no previous declaration.
957  const Decl *getPreviousDecl() const {
958  return const_cast<Decl *>(this)->getPreviousDeclImpl();
959  }
960 
961  /// True if this is the first declaration in its redeclaration chain.
962  bool isFirstDecl() const {
963  return getPreviousDecl() == nullptr;
964  }
965 
966  /// Retrieve the most recent declaration that declares the same entity
967  /// as this declaration (which may be this declaration).
969 
970  /// Retrieve the most recent declaration that declares the same entity
971  /// as this declaration (which may be this declaration).
972  const Decl *getMostRecentDecl() const {
973  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
974  }
975 
976  /// getBody - If this Decl represents a declaration for a body of code,
977  /// such as a function or method definition, this method returns the
978  /// top-level Stmt* of that body. Otherwise this method returns null.
979  virtual Stmt* getBody() const { return nullptr; }
980 
981  /// Returns true if this \c Decl represents a declaration for a body of
982  /// code, such as a function or method definition.
983  /// Note that \c hasBody can also return true if any redeclaration of this
984  /// \c Decl represents a declaration for a body of code.
985  virtual bool hasBody() const { return getBody() != nullptr; }
986 
987  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
988  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
990 
991  // global temp stats (until we have a per-module visitor)
992  static void add(Kind k);
993  static void EnableStatistics();
994  static void PrintStats();
995 
996  /// isTemplateParameter - Determines whether this declaration is a
997  /// template parameter.
998  bool isTemplateParameter() const;
999 
1000  /// isTemplateParameter - Determines whether this declaration is a
1001  /// template parameter pack.
1002  bool isTemplateParameterPack() const;
1003 
1004  /// Whether this declaration is a parameter pack.
1005  bool isParameterPack() const;
1006 
1007  /// returns true if this declaration is a template
1008  bool isTemplateDecl() const;
1009 
1010  /// Whether this declaration is a function or function template.
1012  return (DeclKind >= Decl::firstFunction &&
1013  DeclKind <= Decl::lastFunction) ||
1014  DeclKind == FunctionTemplate;
1015  }
1016 
1017  /// If this is a declaration that describes some template, this
1018  /// method returns that template declaration.
1020 
1021  /// Returns the function itself, or the templated function if this is a
1022  /// function template.
1023  FunctionDecl *getAsFunction() LLVM_READONLY;
1024 
1025  const FunctionDecl *getAsFunction() const {
1026  return const_cast<Decl *>(this)->getAsFunction();
1027  }
1028 
1029  /// Changes the namespace of this declaration to reflect that it's
1030  /// a function-local extern declaration.
1031  ///
1032  /// These declarations appear in the lexical context of the extern
1033  /// declaration, but in the semantic context of the enclosing namespace
1034  /// scope.
1036  Decl *Prev = getPreviousDecl();
1038 
1039  // It's OK for the declaration to still have the "invisible friend" flag or
1040  // the "conflicts with tag declarations in this scope" flag for the outer
1041  // scope.
1042  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1043  "namespace is not ordinary");
1044 
1046  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1048  }
1049 
1050  /// Determine whether this is a block-scope declaration with linkage.
1051  /// This will either be a local variable declaration declared 'extern', or a
1052  /// local function declaration.
1055  }
1056 
1057  /// Changes the namespace of this declaration to reflect that it's
1058  /// the object of a friend declaration.
1059  ///
1060  /// These declarations appear in the lexical context of the friending
1061  /// class, but in the semantic context of the actual entity. This property
1062  /// applies only to a specific decl object; other redeclarations of the
1063  /// same entity may not (and probably don't) share this property.
1064  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1065  unsigned OldNS = IdentifierNamespace;
1066  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1069  "namespace includes neither ordinary nor tag");
1070  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1073  "namespace includes other than ordinary or tag");
1074 
1075  Decl *Prev = getPreviousDecl();
1077 
1078  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1080  if (PerformFriendInjection ||
1081  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1083  }
1084 
1085  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend |
1088  if (PerformFriendInjection ||
1089  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1091  }
1092  }
1093 
1095  FOK_None, ///< Not a friend object.
1096  FOK_Declared, ///< A friend of a previously-declared entity.
1097  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1098  };
1099 
1100  /// Determines whether this declaration is the object of a
1101  /// friend declaration and, if so, what kind.
1102  ///
1103  /// There is currently no direct way to find the associated FriendDecl.
1105  unsigned mask =
1107  if (!mask) return FOK_None;
1109  : FOK_Undeclared);
1110  }
1111 
1112  /// Specifies that this declaration is a C++ overloaded non-member.
1114  assert(getKind() == Function || getKind() == FunctionTemplate);
1115  assert((IdentifierNamespace & IDNS_Ordinary) &&
1116  "visible non-member operators should be in ordinary namespace");
1118  }
1119 
1120  static bool classofKind(Kind K) { return true; }
1121  static DeclContext *castToDeclContext(const Decl *);
1122  static Decl *castFromDeclContext(const DeclContext *);
1123 
1124  void print(raw_ostream &Out, unsigned Indentation = 0,
1125  bool PrintInstantiation = false) const;
1126  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1127  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1128  static void printGroup(Decl** Begin, unsigned NumDecls,
1129  raw_ostream &Out, const PrintingPolicy &Policy,
1130  unsigned Indentation = 0);
1131 
1132  // Debuggers don't usually respect default arguments.
1133  void dump() const;
1134 
1135  // Same as dump(), but forces color printing.
1136  void dumpColor() const;
1137 
1138  void dump(raw_ostream &Out, bool Deserialize = false) const;
1139 
1140  /// \return Unique reproducible object identifier
1141  int64_t getID() const;
1142 
1143  /// Looks through the Decl's underlying type to extract a FunctionType
1144  /// when possible. Will return null if the type underlying the Decl does not
1145  /// have a FunctionType.
1146  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1147 
1148 private:
1149  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1150  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1151  ASTContext &Ctx);
1152 
1153 protected:
1155 };
1156 
1157 /// Determine whether two declarations declare the same entity.
1158 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1159  if (!D1 || !D2)
1160  return false;
1161 
1162  if (D1 == D2)
1163  return true;
1164 
1165  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1166 }
1167 
1168 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1169 /// doing something to a specific decl.
1170 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1171  const Decl *TheDecl;
1172  SourceLocation Loc;
1173  SourceManager &SM;
1174  const char *Message;
1175 
1176 public:
1178  SourceManager &sm, const char *Msg)
1179  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1180 
1181  void print(raw_ostream &OS) const override;
1182 };
1183 
1184 /// The results of name lookup within a DeclContext. This is either a
1185 /// single result (with no stable storage) or a collection of results (with
1186 /// stable storage provided by the lookup table).
1189 
1190  ResultTy Result;
1191 
1192  // If there is only one lookup result, it would be invalidated by
1193  // reallocations of the name table, so store it separately.
1194  NamedDecl *Single = nullptr;
1195 
1196  static NamedDecl *const SingleElementDummyList;
1197 
1198 public:
1199  DeclContextLookupResult() = default;
1201  : Result(Result) {}
1203  : Result(SingleElementDummyList), Single(Single) {}
1204 
1205  class iterator;
1206 
1207  using IteratorBase =
1208  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1209  std::random_access_iterator_tag,
1210  NamedDecl *const>;
1211 
1212  class iterator : public IteratorBase {
1213  value_type SingleElement;
1214 
1215  public:
1216  explicit iterator(pointer Pos, value_type Single = nullptr)
1217  : IteratorBase(Pos), SingleElement(Single) {}
1218 
1220  return SingleElement ? SingleElement : IteratorBase::operator*();
1221  }
1222  };
1223 
1224  using const_iterator = iterator;
1225  using pointer = iterator::pointer;
1226  using reference = iterator::reference;
1227 
1228  iterator begin() const { return iterator(Result.begin(), Single); }
1229  iterator end() const { return iterator(Result.end(), Single); }
1230 
1231  bool empty() const { return Result.empty(); }
1232  pointer data() const { return Single ? &Single : Result.data(); }
1233  size_t size() const { return Single ? 1 : Result.size(); }
1234  reference front() const { return Single ? Single : Result.front(); }
1235  reference back() const { return Single ? Single : Result.back(); }
1236  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1237 
1238  // FIXME: Remove this from the interface
1239  DeclContextLookupResult slice(size_t N) const {
1240  DeclContextLookupResult Sliced = Result.slice(N);
1241  Sliced.Single = Single;
1242  return Sliced;
1243  }
1244 };
1245 
1246 /// DeclContext - This is used only as base class of specific decl types that
1247 /// can act as declaration contexts. These decls are (only the top classes
1248 /// that directly derive from DeclContext are mentioned, not their subclasses):
1249 ///
1250 /// TranslationUnitDecl
1251 /// ExternCContext
1252 /// NamespaceDecl
1253 /// TagDecl
1254 /// OMPDeclareReductionDecl
1255 /// FunctionDecl
1256 /// ObjCMethodDecl
1257 /// ObjCContainerDecl
1258 /// LinkageSpecDecl
1259 /// ExportDecl
1260 /// BlockDecl
1261 /// CapturedDecl
1263  /// For makeDeclVisibleInContextImpl
1264  friend class ASTDeclReader;
1265  /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap,
1266  /// hasNeedToReconcileExternalVisibleStorage
1267  friend class ExternalASTSource;
1268  /// For CreateStoredDeclsMap
1269  friend class DependentDiagnostic;
1270  /// For hasNeedToReconcileExternalVisibleStorage,
1271  /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups
1272  friend class ASTWriter;
1273 
1274  // We use uint64_t in the bit-fields below since some bit-fields
1275  // cross the unsigned boundary and this breaks the packing.
1276 
1277  /// Stores the bits used by DeclContext.
1278  /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor
1279  /// methods in DeclContext should be updated appropriately.
1280  class DeclContextBitfields {
1281  friend class DeclContext;
1282  /// DeclKind - This indicates which class this is.
1283  uint64_t DeclKind : 7;
1284 
1285  /// Whether this declaration context also has some external
1286  /// storage that contains additional declarations that are lexically
1287  /// part of this context.
1288  mutable uint64_t ExternalLexicalStorage : 1;
1289 
1290  /// Whether this declaration context also has some external
1291  /// storage that contains additional declarations that are visible
1292  /// in this context.
1293  mutable uint64_t ExternalVisibleStorage : 1;
1294 
1295  /// Whether this declaration context has had externally visible
1296  /// storage added since the last lookup. In this case, \c LookupPtr's
1297  /// invariant may not hold and needs to be fixed before we perform
1298  /// another lookup.
1299  mutable uint64_t NeedToReconcileExternalVisibleStorage : 1;
1300 
1301  /// If \c true, this context may have local lexical declarations
1302  /// that are missing from the lookup table.
1303  mutable uint64_t HasLazyLocalLexicalLookups : 1;
1304 
1305  /// If \c true, the external source may have lexical declarations
1306  /// that are missing from the lookup table.
1307  mutable uint64_t HasLazyExternalLexicalLookups : 1;
1308 
1309  /// If \c true, lookups should only return identifier from
1310  /// DeclContext scope (for example TranslationUnit). Used in
1311  /// LookupQualifiedName()
1312  mutable uint64_t UseQualifiedLookup : 1;
1313  };
1314 
1315  /// Number of bits in DeclContextBitfields.
1316  enum { NumDeclContextBits = 13 };
1317 
1318  /// Stores the bits used by TagDecl.
1319  /// If modified NumTagDeclBits and the accessor
1320  /// methods in TagDecl should be updated appropriately.
1321  class TagDeclBitfields {
1322  friend class TagDecl;
1323  /// For the bits in DeclContextBitfields
1324  uint64_t : NumDeclContextBits;
1325 
1326  /// The TagKind enum.
1327  uint64_t TagDeclKind : 3;
1328 
1329  /// True if this is a definition ("struct foo {};"), false if it is a
1330  /// declaration ("struct foo;"). It is not considered a definition
1331  /// until the definition has been fully processed.
1332  uint64_t IsCompleteDefinition : 1;
1333 
1334  /// True if this is currently being defined.
1335  uint64_t IsBeingDefined : 1;
1336 
1337  /// True if this tag declaration is "embedded" (i.e., defined or declared
1338  /// for the very first time) in the syntax of a declarator.
1339  uint64_t IsEmbeddedInDeclarator : 1;
1340 
1341  /// True if this tag is free standing, e.g. "struct foo;".
1342  uint64_t IsFreeStanding : 1;
1343 
1344  /// Indicates whether it is possible for declarations of this kind
1345  /// to have an out-of-date definition.
1346  ///
1347  /// This option is only enabled when modules are enabled.
1348  uint64_t MayHaveOutOfDateDef : 1;
1349 
1350  /// Has the full definition of this type been required by a use somewhere in
1351  /// the TU.
1352  uint64_t IsCompleteDefinitionRequired : 1;
1353  };
1354 
1355  /// Number of non-inherited bits in TagDeclBitfields.
1356  enum { NumTagDeclBits = 9 };
1357 
1358  /// Stores the bits used by EnumDecl.
1359  /// If modified NumEnumDeclBit and the accessor
1360  /// methods in EnumDecl should be updated appropriately.
1361  class EnumDeclBitfields {
1362  friend class EnumDecl;
1363  /// For the bits in DeclContextBitfields.
1364  uint64_t : NumDeclContextBits;
1365  /// For the bits in TagDeclBitfields.
1366  uint64_t : NumTagDeclBits;
1367 
1368  /// Width in bits required to store all the non-negative
1369  /// enumerators of this enum.
1370  uint64_t NumPositiveBits : 8;
1371 
1372  /// Width in bits required to store all the negative
1373  /// enumerators of this enum.
1374  uint64_t NumNegativeBits : 8;
1375 
1376  /// True if this tag declaration is a scoped enumeration. Only
1377  /// possible in C++11 mode.
1378  uint64_t IsScoped : 1;
1379 
1380  /// If this tag declaration is a scoped enum,
1381  /// then this is true if the scoped enum was declared using the class
1382  /// tag, false if it was declared with the struct tag. No meaning is
1383  /// associated if this tag declaration is not a scoped enum.
1384  uint64_t IsScopedUsingClassTag : 1;
1385 
1386  /// True if this is an enumeration with fixed underlying type. Only
1387  /// possible in C++11, Microsoft extensions, or Objective C mode.
1388  uint64_t IsFixed : 1;
1389 
1390  /// True if a valid hash is stored in ODRHash.
1391  uint64_t HasODRHash : 1;
1392  };
1393 
1394  /// Number of non-inherited bits in EnumDeclBitfields.
1395  enum { NumEnumDeclBits = 20 };
1396 
1397  /// Stores the bits used by RecordDecl.
1398  /// If modified NumRecordDeclBits and the accessor
1399  /// methods in RecordDecl should be updated appropriately.
1400  class RecordDeclBitfields {
1401  friend class RecordDecl;
1402  /// For the bits in DeclContextBitfields.
1403  uint64_t : NumDeclContextBits;
1404  /// For the bits in TagDeclBitfields.
1405  uint64_t : NumTagDeclBits;
1406 
1407  /// This is true if this struct ends with a flexible
1408  /// array member (e.g. int X[]) or if this union contains a struct that does.
1409  /// If so, this cannot be contained in arrays or other structs as a member.
1410  uint64_t HasFlexibleArrayMember : 1;
1411 
1412  /// Whether this is the type of an anonymous struct or union.
1413  uint64_t AnonymousStructOrUnion : 1;
1414 
1415  /// This is true if this struct has at least one member
1416  /// containing an Objective-C object pointer type.
1417  uint64_t HasObjectMember : 1;
1418 
1419  /// This is true if struct has at least one member of
1420  /// 'volatile' type.
1421  uint64_t HasVolatileMember : 1;
1422 
1423  /// Whether the field declarations of this record have been loaded
1424  /// from external storage. To avoid unnecessary deserialization of
1425  /// methods/nested types we allow deserialization of just the fields
1426  /// when needed.
1427  mutable uint64_t LoadedFieldsFromExternalStorage : 1;
1428 
1429  /// Basic properties of non-trivial C structs.
1430  uint64_t NonTrivialToPrimitiveDefaultInitialize : 1;
1431  uint64_t NonTrivialToPrimitiveCopy : 1;
1432  uint64_t NonTrivialToPrimitiveDestroy : 1;
1433 
1434  /// Indicates whether this struct is destroyed in the callee.
1435  uint64_t ParamDestroyedInCallee : 1;
1436 
1437  /// Represents the way this type is passed to a function.
1438  uint64_t ArgPassingRestrictions : 2;
1439  };
1440 
1441  /// Number of non-inherited bits in RecordDeclBitfields.
1442  enum { NumRecordDeclBits = 11 };
1443 
1444  /// Stores the bits used by OMPDeclareReductionDecl.
1445  /// If modified NumOMPDeclareReductionDeclBits and the accessor
1446  /// methods in OMPDeclareReductionDecl should be updated appropriately.
1447  class OMPDeclareReductionDeclBitfields {
1448  friend class OMPDeclareReductionDecl;
1449  /// For the bits in DeclContextBitfields
1450  uint64_t : NumDeclContextBits;
1451 
1452  /// Kind of initializer,
1453  /// function call or omp_priv<init_expr> initializtion.
1454  uint64_t InitializerKind : 2;
1455  };
1456 
1457  /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields.
1458  enum { NumOMPDeclareReductionDeclBits = 2 };
1459 
1460  /// Stores the bits used by FunctionDecl.
1461  /// If modified NumFunctionDeclBits and the accessor
1462  /// methods in FunctionDecl and CXXDeductionGuideDecl
1463  /// (for IsCopyDeductionCandidate) should be updated appropriately.
1464  class FunctionDeclBitfields {
1465  friend class FunctionDecl;
1466  /// For IsCopyDeductionCandidate
1467  friend class CXXDeductionGuideDecl;
1468  /// For the bits in DeclContextBitfields.
1469  uint64_t : NumDeclContextBits;
1470 
1471  uint64_t SClass : 3;
1472  uint64_t IsInline : 1;
1473  uint64_t IsInlineSpecified : 1;
1474 
1475  /// This is shared by CXXConstructorDecl,
1476  /// CXXConversionDecl, and CXXDeductionGuideDecl.
1477  uint64_t IsExplicitSpecified : 1;
1478 
1479  uint64_t IsVirtualAsWritten : 1;
1480  uint64_t IsPure : 1;
1481  uint64_t HasInheritedPrototype : 1;
1482  uint64_t HasWrittenPrototype : 1;
1483  uint64_t IsDeleted : 1;
1484  /// Used by CXXMethodDecl
1485  uint64_t IsTrivial : 1;
1486 
1487  /// This flag indicates whether this function is trivial for the purpose of
1488  /// calls. This is meaningful only when this function is a copy/move
1489  /// constructor or a destructor.
1490  uint64_t IsTrivialForCall : 1;
1491 
1492  /// Used by CXXMethodDecl
1493  uint64_t IsDefaulted : 1;
1494  /// Used by CXXMethodDecl
1495  uint64_t IsExplicitlyDefaulted : 1;
1496  uint64_t HasImplicitReturnZero : 1;
1497  uint64_t IsLateTemplateParsed : 1;
1498  uint64_t IsConstexpr : 1;
1499  uint64_t InstantiationIsPending : 1;
1500 
1501  /// Indicates if the function uses __try.
1502  uint64_t UsesSEHTry : 1;
1503 
1504  /// Indicates if the function was a definition
1505  /// but its body was skipped.
1506  uint64_t HasSkippedBody : 1;
1507 
1508  /// Indicates if the function declaration will
1509  /// have a body, once we're done parsing it.
1510  uint64_t WillHaveBody : 1;
1511 
1512  /// Indicates that this function is a multiversioned
1513  /// function using attribute 'target'.
1514  uint64_t IsMultiVersion : 1;
1515 
1516  /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that
1517  /// the Deduction Guide is the implicitly generated 'copy
1518  /// deduction candidate' (is used during overload resolution).
1519  uint64_t IsCopyDeductionCandidate : 1;
1520 
1521  /// Store the ODRHash after first calculation.
1522  uint64_t HasODRHash : 1;
1523  };
1524 
1525  /// Number of non-inherited bits in FunctionDeclBitfields.
1526  enum { NumFunctionDeclBits = 25 };
1527 
1528  /// Stores the bits used by CXXConstructorDecl. If modified
1529  /// NumCXXConstructorDeclBits and the accessor
1530  /// methods in CXXConstructorDecl should be updated appropriately.
1531  class CXXConstructorDeclBitfields {
1532  friend class CXXConstructorDecl;
1533  /// For the bits in DeclContextBitfields.
1534  uint64_t : NumDeclContextBits;
1535  /// For the bits in FunctionDeclBitfields.
1536  uint64_t : NumFunctionDeclBits;
1537 
1538  /// 25 bits to fit in the remaining availible space.
1539  /// Note that this makes CXXConstructorDeclBitfields take
1540  /// exactly 64 bits and thus the width of NumCtorInitializers
1541  /// will need to be shrunk if some bit is added to NumDeclContextBitfields,
1542  /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields.
1543  uint64_t NumCtorInitializers : 25;
1544  uint64_t IsInheritingConstructor : 1;
1545  };
1546 
1547  /// Number of non-inherited bits in CXXConstructorDeclBitfields.
1548  enum { NumCXXConstructorDeclBits = 26 };
1549 
1550  /// Stores the bits used by ObjCMethodDecl.
1551  /// If modified NumObjCMethodDeclBits and the accessor
1552  /// methods in ObjCMethodDecl should be updated appropriately.
1553  class ObjCMethodDeclBitfields {
1554  friend class ObjCMethodDecl;
1555 
1556  /// For the bits in DeclContextBitfields.
1557  uint64_t : NumDeclContextBits;
1558 
1559  /// The conventional meaning of this method; an ObjCMethodFamily.
1560  /// This is not serialized; instead, it is computed on demand and
1561  /// cached.
1562  mutable uint64_t Family : ObjCMethodFamilyBitWidth;
1563 
1564  /// instance (true) or class (false) method.
1565  uint64_t IsInstance : 1;
1566  uint64_t IsVariadic : 1;
1567 
1568  /// True if this method is the getter or setter for an explicit property.
1569  uint64_t IsPropertyAccessor : 1;
1570 
1571  /// Method has a definition.
1572  uint64_t IsDefined : 1;
1573 
1574  /// Method redeclaration in the same interface.
1575  uint64_t IsRedeclaration : 1;
1576 
1577  /// Is redeclared in the same interface.
1578  mutable uint64_t HasRedeclaration : 1;
1579 
1580  /// \@required/\@optional
1581  uint64_t DeclImplementation : 2;
1582 
1583  /// in, inout, etc.
1584  uint64_t objcDeclQualifier : 7;
1585 
1586  /// Indicates whether this method has a related result type.
1587  uint64_t RelatedResultType : 1;
1588 
1589  /// Whether the locations of the selector identifiers are in a
1590  /// "standard" position, a enum SelectorLocationsKind.
1591  uint64_t SelLocsKind : 2;
1592 
1593  /// Whether this method overrides any other in the class hierarchy.
1594  ///
1595  /// A method is said to override any method in the class's
1596  /// base classes, its protocols, or its categories' protocols, that has
1597  /// the same selector and is of the same kind (class or instance).
1598  /// A method in an implementation is not considered as overriding the same
1599  /// method in the interface or its categories.
1600  uint64_t IsOverriding : 1;
1601 
1602  /// Indicates if the method was a definition but its body was skipped.
1603  uint64_t HasSkippedBody : 1;
1604  };
1605 
1606  /// Number of non-inherited bits in ObjCMethodDeclBitfields.
1607  enum { NumObjCMethodDeclBits = 24 };
1608 
1609  /// Stores the bits used by ObjCContainerDecl.
1610  /// If modified NumObjCContainerDeclBits and the accessor
1611  /// methods in ObjCContainerDecl should be updated appropriately.
1612  class ObjCContainerDeclBitfields {
1613  friend class ObjCContainerDecl;
1614  /// For the bits in DeclContextBitfields
1615  uint32_t : NumDeclContextBits;
1616 
1617  // Not a bitfield but this saves space.
1618  // Note that ObjCContainerDeclBitfields is full.
1619  SourceLocation AtStart;
1620  };
1621 
1622  /// Number of non-inherited bits in ObjCContainerDeclBitfields.
1623  /// Note that here we rely on the fact that SourceLocation is 32 bits
1624  /// wide. We check this with the static_assert in the ctor of DeclContext.
1625  enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits };
1626 
1627  /// Stores the bits used by LinkageSpecDecl.
1628  /// If modified NumLinkageSpecDeclBits and the accessor
1629  /// methods in LinkageSpecDecl should be updated appropriately.
1630  class LinkageSpecDeclBitfields {
1631  friend class LinkageSpecDecl;
1632  /// For the bits in DeclContextBitfields.
1633  uint64_t : NumDeclContextBits;
1634 
1635  /// The language for this linkage specification with values
1636  /// in the enum LinkageSpecDecl::LanguageIDs.
1637  uint64_t Language : 3;
1638 
1639  /// True if this linkage spec has braces.
1640  /// This is needed so that hasBraces() returns the correct result while the
1641  /// linkage spec body is being parsed. Once RBraceLoc has been set this is
1642  /// not used, so it doesn't need to be serialized.
1643  uint64_t HasBraces : 1;
1644  };
1645 
1646  /// Number of non-inherited bits in LinkageSpecDeclBitfields.
1647  enum { NumLinkageSpecDeclBits = 4 };
1648 
1649  /// Stores the bits used by BlockDecl.
1650  /// If modified NumBlockDeclBits and the accessor
1651  /// methods in BlockDecl should be updated appropriately.
1652  class BlockDeclBitfields {
1653  friend class BlockDecl;
1654  /// For the bits in DeclContextBitfields.
1655  uint64_t : NumDeclContextBits;
1656 
1657  uint64_t IsVariadic : 1;
1658  uint64_t CapturesCXXThis : 1;
1659  uint64_t BlockMissingReturnType : 1;
1660  uint64_t IsConversionFromLambda : 1;
1661 
1662  /// A bit that indicates this block is passed directly to a function as a
1663  /// non-escaping parameter.
1664  uint64_t DoesNotEscape : 1;
1665  };
1666 
1667  /// Number of non-inherited bits in BlockDeclBitfields.
1668  enum { NumBlockDeclBits = 5 };
1669 
1670  /// Pointer to the data structure used to lookup declarations
1671  /// within this context (or a DependentStoredDeclsMap if this is a
1672  /// dependent context). We maintain the invariant that, if the map
1673  /// contains an entry for a DeclarationName (and we haven't lazily
1674  /// omitted anything), then it contains all relevant entries for that
1675  /// name (modulo the hasExternalDecls() flag).
1676  mutable StoredDeclsMap *LookupPtr = nullptr;
1677 
1678 protected:
1679  /// This anonymous union stores the bits belonging to DeclContext and classes
1680  /// deriving from it. The goal is to use otherwise wasted
1681  /// space in DeclContext to store data belonging to derived classes.
1682  /// The space saved is especially significient when pointers are aligned
1683  /// to 8 bytes. In this case due to alignment requirements we have a
1684  /// little less than 8 bytes free in DeclContext which we can use.
1685  /// We check that none of the classes in this union is larger than
1686  /// 8 bytes with static_asserts in the ctor of DeclContext.
1687  union {
1688  DeclContextBitfields DeclContextBits;
1689  TagDeclBitfields TagDeclBits;
1690  EnumDeclBitfields EnumDeclBits;
1691  RecordDeclBitfields RecordDeclBits;
1692  OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits;
1693  FunctionDeclBitfields FunctionDeclBits;
1694  CXXConstructorDeclBitfields CXXConstructorDeclBits;
1695  ObjCMethodDeclBitfields ObjCMethodDeclBits;
1696  ObjCContainerDeclBitfields ObjCContainerDeclBits;
1697  LinkageSpecDeclBitfields LinkageSpecDeclBits;
1698  BlockDeclBitfields BlockDeclBits;
1699 
1700  static_assert(sizeof(DeclContextBitfields) <= 8,
1701  "DeclContextBitfields is larger than 8 bytes!");
1702  static_assert(sizeof(TagDeclBitfields) <= 8,
1703  "TagDeclBitfields is larger than 8 bytes!");
1704  static_assert(sizeof(EnumDeclBitfields) <= 8,
1705  "EnumDeclBitfields is larger than 8 bytes!");
1706  static_assert(sizeof(RecordDeclBitfields) <= 8,
1707  "RecordDeclBitfields is larger than 8 bytes!");
1708  static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8,
1709  "OMPDeclareReductionDeclBitfields is larger than 8 bytes!");
1710  static_assert(sizeof(FunctionDeclBitfields) <= 8,
1711  "FunctionDeclBitfields is larger than 8 bytes!");
1712  static_assert(sizeof(CXXConstructorDeclBitfields) <= 8,
1713  "CXXConstructorDeclBitfields is larger than 8 bytes!");
1714  static_assert(sizeof(ObjCMethodDeclBitfields) <= 8,
1715  "ObjCMethodDeclBitfields is larger than 8 bytes!");
1716  static_assert(sizeof(ObjCContainerDeclBitfields) <= 8,
1717  "ObjCContainerDeclBitfields is larger than 8 bytes!");
1718  static_assert(sizeof(LinkageSpecDeclBitfields) <= 8,
1719  "LinkageSpecDeclBitfields is larger than 8 bytes!");
1720  static_assert(sizeof(BlockDeclBitfields) <= 8,
1721  "BlockDeclBitfields is larger than 8 bytes!");
1722  };
1723 
1724  /// FirstDecl - The first declaration stored within this declaration
1725  /// context.
1726  mutable Decl *FirstDecl = nullptr;
1727 
1728  /// LastDecl - The last declaration stored within this declaration
1729  /// context. FIXME: We could probably cache this value somewhere
1730  /// outside of the DeclContext, to reduce the size of DeclContext by
1731  /// another pointer.
1732  mutable Decl *LastDecl = nullptr;
1733 
1734  /// Build up a chain of declarations.
1735  ///
1736  /// \returns the first/last pair of declarations.
1737  static std::pair<Decl *, Decl *>
1738  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1739 
1741 
1742 public:
1743  ~DeclContext();
1744 
1746  return static_cast<Decl::Kind>(DeclContextBits.DeclKind);
1747  }
1748 
1749  const char *getDeclKindName() const;
1750 
1751  /// getParent - Returns the containing DeclContext.
1753  return cast<Decl>(this)->getDeclContext();
1754  }
1755  const DeclContext *getParent() const {
1756  return const_cast<DeclContext*>(this)->getParent();
1757  }
1758 
1759  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1760  /// different from getParent, e.g.:
1761  ///
1762  /// namespace A {
1763  /// struct S;
1764  /// }
1765  /// struct A::S {}; // getParent() == namespace 'A'
1766  /// // getLexicalParent() == translation unit
1767  ///
1769  return cast<Decl>(this)->getLexicalDeclContext();
1770  }
1772  return const_cast<DeclContext*>(this)->getLexicalParent();
1773  }
1774 
1775  DeclContext *getLookupParent();
1776 
1777  const DeclContext *getLookupParent() const {
1778  return const_cast<DeclContext*>(this)->getLookupParent();
1779  }
1780 
1782  return cast<Decl>(this)->getASTContext();
1783  }
1784 
1785  bool isClosure() const { return getDeclKind() == Decl::Block; }
1786 
1787  bool isObjCContainer() const {
1788  switch (getDeclKind()) {
1789  case Decl::ObjCCategory:
1790  case Decl::ObjCCategoryImpl:
1791  case Decl::ObjCImplementation:
1792  case Decl::ObjCInterface:
1793  case Decl::ObjCProtocol:
1794  return true;
1795  default:
1796  return false;
1797  }
1798  }
1799 
1800  bool isFunctionOrMethod() const {
1801  switch (getDeclKind()) {
1802  case Decl::Block:
1803  case Decl::Captured:
1804  case Decl::ObjCMethod:
1805  return true;
1806  default:
1807  return getDeclKind() >= Decl::firstFunction &&
1808  getDeclKind() <= Decl::lastFunction;
1809  }
1810  }
1811 
1812  /// Test whether the context supports looking up names.
1813  bool isLookupContext() const {
1814  return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec &&
1815  getDeclKind() != Decl::Export;
1816  }
1817 
1818  bool isFileContext() const {
1819  return getDeclKind() == Decl::TranslationUnit ||
1820  getDeclKind() == Decl::Namespace;
1821  }
1822 
1823  bool isTranslationUnit() const {
1824  return getDeclKind() == Decl::TranslationUnit;
1825  }
1826 
1827  bool isRecord() const {
1828  return getDeclKind() >= Decl::firstRecord &&
1829  getDeclKind() <= Decl::lastRecord;
1830  }
1831 
1832  bool isNamespace() const { return getDeclKind() == Decl::Namespace; }
1833 
1834  bool isStdNamespace() const;
1835 
1836  bool isInlineNamespace() const;
1837 
1838  /// Determines whether this context is dependent on a
1839  /// template parameter.
1840  bool isDependentContext() const;
1841 
1842  /// isTransparentContext - Determines whether this context is a
1843  /// "transparent" context, meaning that the members declared in this
1844  /// context are semantically declared in the nearest enclosing
1845  /// non-transparent (opaque) context but are lexically declared in
1846  /// this context. For example, consider the enumerators of an
1847  /// enumeration type:
1848  /// @code
1849  /// enum E {
1850  /// Val1
1851  /// };
1852  /// @endcode
1853  /// Here, E is a transparent context, so its enumerator (Val1) will
1854  /// appear (semantically) that it is in the same context of E.
1855  /// Examples of transparent contexts include: enumerations (except for
1856  /// C++0x scoped enums), and C++ linkage specifications.
1857  bool isTransparentContext() const;
1858 
1859  /// Determines whether this context or some of its ancestors is a
1860  /// linkage specification context that specifies C linkage.
1861  bool isExternCContext() const;
1862 
1863  /// Retrieve the nearest enclosing C linkage specification context.
1864  const LinkageSpecDecl *getExternCContext() const;
1865 
1866  /// Determines whether this context or some of its ancestors is a
1867  /// linkage specification context that specifies C++ linkage.
1868  bool isExternCXXContext() const;
1869 
1870  /// Determine whether this declaration context is equivalent
1871  /// to the declaration context DC.
1872  bool Equals(const DeclContext *DC) const {
1873  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1874  }
1875 
1876  /// Determine whether this declaration context encloses the
1877  /// declaration context DC.
1878  bool Encloses(const DeclContext *DC) const;
1879 
1880  /// Find the nearest non-closure ancestor of this context,
1881  /// i.e. the innermost semantic parent of this context which is not
1882  /// a closure. A context may be its own non-closure ancestor.
1883  Decl *getNonClosureAncestor();
1884  const Decl *getNonClosureAncestor() const {
1885  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1886  }
1887 
1888  /// getPrimaryContext - There may be many different
1889  /// declarations of the same entity (including forward declarations
1890  /// of classes, multiple definitions of namespaces, etc.), each with
1891  /// a different set of declarations. This routine returns the
1892  /// "primary" DeclContext structure, which will contain the
1893  /// information needed to perform name lookup into this context.
1894  DeclContext *getPrimaryContext();
1896  return const_cast<DeclContext*>(this)->getPrimaryContext();
1897  }
1898 
1899  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1900  /// other entities of the same name, or where it is a redeclaration if the
1901  /// two entities are compatible. This skips through transparent contexts.
1902  DeclContext *getRedeclContext();
1904  return const_cast<DeclContext *>(this)->getRedeclContext();
1905  }
1906 
1907  /// Retrieve the nearest enclosing namespace context.
1908  DeclContext *getEnclosingNamespaceContext();
1910  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1911  }
1912 
1913  /// Retrieve the outermost lexically enclosing record context.
1914  RecordDecl *getOuterLexicalRecordContext();
1916  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1917  }
1918 
1919  /// Test if this context is part of the enclosing namespace set of
1920  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1921  /// isn't a namespace, this is equivalent to Equals().
1922  ///
1923  /// The enclosing namespace set of a namespace is the namespace and, if it is
1924  /// inline, its enclosing namespace, recursively.
1925  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1926 
1927  /// Collects all of the declaration contexts that are semantically
1928  /// connected to this declaration context.
1929  ///
1930  /// For declaration contexts that have multiple semantically connected but
1931  /// syntactically distinct contexts, such as C++ namespaces, this routine
1932  /// retrieves the complete set of such declaration contexts in source order.
1933  /// For example, given:
1934  ///
1935  /// \code
1936  /// namespace N {
1937  /// int x;
1938  /// }
1939  /// namespace N {
1940  /// int y;
1941  /// }
1942  /// \endcode
1943  ///
1944  /// The \c Contexts parameter will contain both definitions of N.
1945  ///
1946  /// \param Contexts Will be cleared and set to the set of declaration
1947  /// contexts that are semanticaly connected to this declaration context,
1948  /// in source order, including this context (which may be the only result,
1949  /// for non-namespace contexts).
1950  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1951 
1952  /// decl_iterator - Iterates through the declarations stored
1953  /// within this context.
1955  /// Current - The current declaration.
1956  Decl *Current = nullptr;
1957 
1958  public:
1959  using value_type = Decl *;
1960  using reference = const value_type &;
1961  using pointer = const value_type *;
1962  using iterator_category = std::forward_iterator_tag;
1964 
1965  decl_iterator() = default;
1966  explicit decl_iterator(Decl *C) : Current(C) {}
1967 
1968  reference operator*() const { return Current; }
1969 
1970  // This doesn't meet the iterator requirements, but it's convenient
1971  value_type operator->() const { return Current; }
1972 
1974  Current = Current->getNextDeclInContext();
1975  return *this;
1976  }
1977 
1979  decl_iterator tmp(*this);
1980  ++(*this);
1981  return tmp;
1982  }
1983 
1985  return x.Current == y.Current;
1986  }
1987 
1989  return x.Current != y.Current;
1990  }
1991  };
1992 
1993  using decl_range = llvm::iterator_range<decl_iterator>;
1994 
1995  /// decls_begin/decls_end - Iterate over the declarations stored in
1996  /// this context.
1997  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1998  decl_iterator decls_begin() const;
1999  decl_iterator decls_end() const { return decl_iterator(); }
2000  bool decls_empty() const;
2001 
2002  /// noload_decls_begin/end - Iterate over the declarations stored in this
2003  /// context that are currently loaded; don't attempt to retrieve anything
2004  /// from an external source.
2006  return decl_range(noload_decls_begin(), noload_decls_end());
2007  }
2008  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
2010 
2011  /// specific_decl_iterator - Iterates over a subrange of
2012  /// declarations stored in a DeclContext, providing only those that
2013  /// are of type SpecificDecl (or a class derived from it). This
2014  /// iterator is used, for example, to provide iteration over just
2015  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
2016  template<typename SpecificDecl>
2018  /// Current - The current, underlying declaration iterator, which
2019  /// will either be NULL or will point to a declaration of
2020  /// type SpecificDecl.
2022 
2023  /// SkipToNextDecl - Advances the current position up to the next
2024  /// declaration of type SpecificDecl that also meets the criteria
2025  /// required by Acceptable.
2026  void SkipToNextDecl() {
2027  while (*Current && !isa<SpecificDecl>(*Current))
2028  ++Current;
2029  }
2030 
2031  public:
2032  using value_type = SpecificDecl *;
2033  // TODO: Add reference and pointer types (with some appropriate proxy type)
2034  // if we ever have a need for them.
2035  using reference = void;
2036  using pointer = void;
2037  using difference_type =
2038  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2039  using iterator_category = std::forward_iterator_tag;
2040 
2041  specific_decl_iterator() = default;
2042 
2043  /// specific_decl_iterator - Construct a new iterator over a
2044  /// subset of the declarations the range [C,
2045  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2046  /// member function of SpecificDecl that should return true for
2047  /// all of the SpecificDecl instances that will be in the subset
2048  /// of iterators. For example, if you want Objective-C instance
2049  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2050  /// &ObjCMethodDecl::isInstanceMethod.
2052  SkipToNextDecl();
2053  }
2054 
2055  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2056 
2057  // This doesn't meet the iterator requirements, but it's convenient
2058  value_type operator->() const { return **this; }
2059 
2061  ++Current;
2062  SkipToNextDecl();
2063  return *this;
2064  }
2065 
2067  specific_decl_iterator tmp(*this);
2068  ++(*this);
2069  return tmp;
2070  }
2071 
2072  friend bool operator==(const specific_decl_iterator& x,
2073  const specific_decl_iterator& y) {
2074  return x.Current == y.Current;
2075  }
2076 
2077  friend bool operator!=(const specific_decl_iterator& x,
2078  const specific_decl_iterator& y) {
2079  return x.Current != y.Current;
2080  }
2081  };
2082 
2083  /// Iterates over a filtered subrange of declarations stored
2084  /// in a DeclContext.
2085  ///
2086  /// This iterator visits only those declarations that are of type
2087  /// SpecificDecl (or a class derived from it) and that meet some
2088  /// additional run-time criteria. This iterator is used, for
2089  /// example, to provide access to the instance methods within an
2090  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
2091  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
2092  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
2094  /// Current - The current, underlying declaration iterator, which
2095  /// will either be NULL or will point to a declaration of
2096  /// type SpecificDecl.
2098 
2099  /// SkipToNextDecl - Advances the current position up to the next
2100  /// declaration of type SpecificDecl that also meets the criteria
2101  /// required by Acceptable.
2102  void SkipToNextDecl() {
2103  while (*Current &&
2104  (!isa<SpecificDecl>(*Current) ||
2105  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
2106  ++Current;
2107  }
2108 
2109  public:
2110  using value_type = SpecificDecl *;
2111  // TODO: Add reference and pointer types (with some appropriate proxy type)
2112  // if we ever have a need for them.
2113  using reference = void;
2114  using pointer = void;
2115  using difference_type =
2116  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2117  using iterator_category = std::forward_iterator_tag;
2118 
2119  filtered_decl_iterator() = default;
2120 
2121  /// filtered_decl_iterator - Construct a new iterator over a
2122  /// subset of the declarations the range [C,
2123  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2124  /// member function of SpecificDecl that should return true for
2125  /// all of the SpecificDecl instances that will be in the subset
2126  /// of iterators. For example, if you want Objective-C instance
2127  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2128  /// &ObjCMethodDecl::isInstanceMethod.
2130  SkipToNextDecl();
2131  }
2132 
2133  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2134  value_type operator->() const { return cast<SpecificDecl>(*Current); }
2135 
2137  ++Current;
2138  SkipToNextDecl();
2139  return *this;
2140  }
2141 
2143  filtered_decl_iterator tmp(*this);
2144  ++(*this);
2145  return tmp;
2146  }
2147 
2148  friend bool operator==(const filtered_decl_iterator& x,
2149  const filtered_decl_iterator& y) {
2150  return x.Current == y.Current;
2151  }
2152 
2153  friend bool operator!=(const filtered_decl_iterator& x,
2154  const filtered_decl_iterator& y) {
2155  return x.Current != y.Current;
2156  }
2157  };
2158 
2159  /// Add the declaration D into this context.
2160  ///
2161  /// This routine should be invoked when the declaration D has first
2162  /// been declared, to place D into the context where it was
2163  /// (lexically) defined. Every declaration must be added to one
2164  /// (and only one!) context, where it can be visited via
2165  /// [decls_begin(), decls_end()). Once a declaration has been added
2166  /// to its lexical context, the corresponding DeclContext owns the
2167  /// declaration.
2168  ///
2169  /// If D is also a NamedDecl, it will be made visible within its
2170  /// semantic context via makeDeclVisibleInContext.
2171  void addDecl(Decl *D);
2172 
2173  /// Add the declaration D into this context, but suppress
2174  /// searches for external declarations with the same name.
2175  ///
2176  /// Although analogous in function to addDecl, this removes an
2177  /// important check. This is only useful if the Decl is being
2178  /// added in response to an external search; in all other cases,
2179  /// addDecl() is the right function to use.
2180  /// See the ASTImporter for use cases.
2181  void addDeclInternal(Decl *D);
2182 
2183  /// Add the declaration D to this context without modifying
2184  /// any lookup tables.
2185  ///
2186  /// This is useful for some operations in dependent contexts where
2187  /// the semantic context might not be dependent; this basically
2188  /// only happens with friends.
2189  void addHiddenDecl(Decl *D);
2190 
2191  /// Removes a declaration from this context.
2192  void removeDecl(Decl *D);
2193 
2194  /// Checks whether a declaration is in this context.
2195  bool containsDecl(Decl *D) const;
2196 
2197  /// Checks whether a declaration is in this context.
2198  /// This also loads the Decls from the external source before the check.
2199  bool containsDeclAndLoad(Decl *D) const;
2200 
2203 
2204  /// lookup - Find the declarations (if any) with the given Name in
2205  /// this context. Returns a range of iterators that contains all of
2206  /// the declarations with this name, with object, function, member,
2207  /// and enumerator names preceding any tag name. Note that this
2208  /// routine will not look into parent contexts.
2209  lookup_result lookup(DeclarationName Name) const;
2210 
2211  /// Find the declarations with the given name that are visible
2212  /// within this context; don't attempt to retrieve anything from an
2213  /// external source.
2214  lookup_result noload_lookup(DeclarationName Name);
2215 
2216  /// A simplistic name lookup mechanism that performs name lookup
2217  /// into this declaration context without consulting the external source.
2218  ///
2219  /// This function should almost never be used, because it subverts the
2220  /// usual relationship between a DeclContext and the external source.
2221  /// See the ASTImporter for the (few, but important) use cases.
2222  ///
2223  /// FIXME: This is very inefficient; replace uses of it with uses of
2224  /// noload_lookup.
2225  void localUncachedLookup(DeclarationName Name,
2226  SmallVectorImpl<NamedDecl *> &Results);
2227 
2228  /// Makes a declaration visible within this context.
2229  ///
2230  /// This routine makes the declaration D visible to name lookup
2231  /// within this context and, if this is a transparent context,
2232  /// within its parent contexts up to the first enclosing
2233  /// non-transparent context. Making a declaration visible within a
2234  /// context does not transfer ownership of a declaration, and a
2235  /// declaration can be visible in many contexts that aren't its
2236  /// lexical context.
2237  ///
2238  /// If D is a redeclaration of an existing declaration that is
2239  /// visible from this context, as determined by
2240  /// NamedDecl::declarationReplaces, the previous declaration will be
2241  /// replaced with D.
2242  void makeDeclVisibleInContext(NamedDecl *D);
2243 
2244  /// all_lookups_iterator - An iterator that provides a view over the results
2245  /// of looking up every possible name.
2246  class all_lookups_iterator;
2247 
2248  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
2249 
2250  lookups_range lookups() const;
2251  // Like lookups(), but avoids loading external declarations.
2252  // If PreserveInternalState, avoids building lookup data structures too.
2253  lookups_range noload_lookups(bool PreserveInternalState) const;
2254 
2255  /// Iterators over all possible lookups within this context.
2256  all_lookups_iterator lookups_begin() const;
2257  all_lookups_iterator lookups_end() const;
2258 
2259  /// Iterators over all possible lookups within this context that are
2260  /// currently loaded; don't attempt to retrieve anything from an external
2261  /// source.
2262  all_lookups_iterator noload_lookups_begin() const;
2263  all_lookups_iterator noload_lookups_end() const;
2264 
2265  struct udir_iterator;
2266 
2267  using udir_iterator_base =
2268  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
2269  std::random_access_iterator_tag,
2271 
2272  struct udir_iterator : udir_iterator_base {
2273  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
2274 
2275  UsingDirectiveDecl *operator*() const;
2276  };
2277 
2278  using udir_range = llvm::iterator_range<udir_iterator>;
2279 
2280  udir_range using_directives() const;
2281 
2282  // These are all defined in DependentDiagnostic.h.
2283  class ddiag_iterator;
2284 
2285  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
2286 
2287  inline ddiag_range ddiags() const;
2288 
2289  // Low-level accessors
2290 
2291  /// Mark that there are external lexical declarations that we need
2292  /// to include in our lookup table (and that are not available as external
2293  /// visible lookups). These extra lookup results will be found by walking
2294  /// the lexical declarations of this context. This should be used only if
2295  /// setHasExternalLexicalStorage() has been called on any decl context for
2296  /// which this is the primary context.
2298  assert(this == getPrimaryContext() &&
2299  "should only be called on primary context");
2300  DeclContextBits.HasLazyExternalLexicalLookups = true;
2301  }
2302 
2303  /// Retrieve the internal representation of the lookup structure.
2304  /// This may omit some names if we are lazily building the structure.
2305  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
2306 
2307  /// Ensure the lookup structure is fully-built and return it.
2308  StoredDeclsMap *buildLookup();
2309 
2310  /// Whether this DeclContext has external storage containing
2311  /// additional declarations that are lexically in this context.
2313  return DeclContextBits.ExternalLexicalStorage;
2314  }
2315 
2316  /// State whether this DeclContext has external storage for
2317  /// declarations lexically in this context.
2318  void setHasExternalLexicalStorage(bool ES = true) const {
2319  DeclContextBits.ExternalLexicalStorage = ES;
2320  }
2321 
2322  /// Whether this DeclContext has external storage containing
2323  /// additional declarations that are visible in this context.
2325  return DeclContextBits.ExternalVisibleStorage;
2326  }
2327 
2328  /// State whether this DeclContext has external storage for
2329  /// declarations visible in this context.
2330  void setHasExternalVisibleStorage(bool ES = true) const {
2331  DeclContextBits.ExternalVisibleStorage = ES;
2332  if (ES && LookupPtr)
2333  DeclContextBits.NeedToReconcileExternalVisibleStorage = true;
2334  }
2335 
2336  /// Determine whether the given declaration is stored in the list of
2337  /// declarations lexically within this context.
2338  bool isDeclInLexicalTraversal(const Decl *D) const {
2339  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
2340  D == LastDecl);
2341  }
2342 
2343  bool setUseQualifiedLookup(bool use = true) const {
2344  bool old_value = DeclContextBits.UseQualifiedLookup;
2345  DeclContextBits.UseQualifiedLookup = use;
2346  return old_value;
2347  }
2348 
2350  return DeclContextBits.UseQualifiedLookup;
2351  }
2352 
2353  static bool classof(const Decl *D);
2354  static bool classof(const DeclContext *D) { return true; }
2355 
2356  void dumpDeclContext() const;
2357  void dumpLookups() const;
2358  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
2359  bool Deserialize = false) const;
2360 
2361 private:
2362  /// Whether this declaration context has had externally visible
2363  /// storage added since the last lookup. In this case, \c LookupPtr's
2364  /// invariant may not hold and needs to be fixed before we perform
2365  /// another lookup.
2366  bool hasNeedToReconcileExternalVisibleStorage() const {
2367  return DeclContextBits.NeedToReconcileExternalVisibleStorage;
2368  }
2369 
2370  /// State that this declaration context has had externally visible
2371  /// storage added since the last lookup. In this case, \c LookupPtr's
2372  /// invariant may not hold and needs to be fixed before we perform
2373  /// another lookup.
2374  void setNeedToReconcileExternalVisibleStorage(bool Need = true) const {
2375  DeclContextBits.NeedToReconcileExternalVisibleStorage = Need;
2376  }
2377 
2378  /// If \c true, this context may have local lexical declarations
2379  /// that are missing from the lookup table.
2380  bool hasLazyLocalLexicalLookups() const {
2381  return DeclContextBits.HasLazyLocalLexicalLookups;
2382  }
2383 
2384  /// If \c true, this context may have local lexical declarations
2385  /// that are missing from the lookup table.
2386  void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const {
2387  DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL;
2388  }
2389 
2390  /// If \c true, the external source may have lexical declarations
2391  /// that are missing from the lookup table.
2392  bool hasLazyExternalLexicalLookups() const {
2393  return DeclContextBits.HasLazyExternalLexicalLookups;
2394  }
2395 
2396  /// If \c true, the external source may have lexical declarations
2397  /// that are missing from the lookup table.
2398  void setHasLazyExternalLexicalLookups(bool HasLELL = true) const {
2399  DeclContextBits.HasLazyExternalLexicalLookups = HasLELL;
2400  }
2401 
2402  void reconcileExternalVisibleStorage() const;
2403  bool LoadLexicalDeclsFromExternalStorage() const;
2404 
2405  /// Makes a declaration visible within this context, but
2406  /// suppresses searches for external declarations with the same
2407  /// name.
2408  ///
2409  /// Analogous to makeDeclVisibleInContext, but for the exclusive
2410  /// use of addDeclInternal().
2411  void makeDeclVisibleInContextInternal(NamedDecl *D);
2412 
2413  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
2414 
2415  void loadLazyLocalLexicalLookups();
2416  void buildLookupImpl(DeclContext *DCtx, bool Internal);
2417  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
2418  bool Rediscoverable);
2419  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
2420 };
2421 
2422 inline bool Decl::isTemplateParameter() const {
2423  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
2424  getKind() == TemplateTemplateParm;
2425 }
2426 
2427 // Specialization selected when ToTy is not a known subclass of DeclContext.
2428 template <class ToTy,
2429  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
2431  static const ToTy *doit(const DeclContext *Val) {
2432  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
2433  }
2434 
2435  static ToTy *doit(DeclContext *Val) {
2436  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
2437  }
2438 };
2439 
2440 // Specialization selected when ToTy is a known subclass of DeclContext.
2441 template <class ToTy>
2443  static const ToTy *doit(const DeclContext *Val) {
2444  return static_cast<const ToTy*>(Val);
2445  }
2446 
2447  static ToTy *doit(DeclContext *Val) {
2448  return static_cast<ToTy*>(Val);
2449  }
2450 };
2451 
2452 } // namespace clang
2453 
2454 namespace llvm {
2455 
2456 /// isa<T>(DeclContext*)
2457 template <typename To>
2458 struct isa_impl<To, ::clang::DeclContext> {
2459  static bool doit(const ::clang::DeclContext &Val) {
2460  return To::classofKind(Val.getDeclKind());
2461  }
2462 };
2463 
2464 /// cast<T>(DeclContext*)
2465 template<class ToTy>
2466 struct cast_convert_val<ToTy,
2467  const ::clang::DeclContext,const ::clang::DeclContext> {
2468  static const ToTy &doit(const ::clang::DeclContext &Val) {
2470  }
2471 };
2472 
2473 template<class ToTy>
2474 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2475  static ToTy &doit(::clang::DeclContext &Val) {
2477  }
2478 };
2479 
2480 template<class ToTy>
2481 struct cast_convert_val<ToTy,
2482  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2483  static const ToTy *doit(const ::clang::DeclContext *Val) {
2484  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2485  }
2486 };
2487 
2488 template<class ToTy>
2489 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2490  static ToTy *doit(::clang::DeclContext *Val) {
2491  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2492  }
2493 };
2494 
2495 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2496 template<class FromTy>
2497 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2498  static ::clang::DeclContext &doit(const FromTy &Val) {
2499  return *FromTy::castToDeclContext(&Val);
2500  }
2501 };
2502 
2503 template<class FromTy>
2504 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2505  static ::clang::DeclContext *doit(const FromTy *Val) {
2506  return FromTy::castToDeclContext(Val);
2507  }
2508 };
2509 
2510 template<class FromTy>
2511 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2512  static const ::clang::DeclContext &doit(const FromTy &Val) {
2513  return *FromTy::castToDeclContext(&Val);
2514  }
2515 };
2516 
2517 template<class FromTy>
2518 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2519  static const ::clang::DeclContext *doit(const FromTy *Val) {
2520  return FromTy::castToDeclContext(Val);
2521  }
2522 };
2523 
2524 } // namespace llvm
2525 
2526 #endif // LLVM_CLANG_AST_DECLBASE_H
const Decl * getPreviousDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:957
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:2349
specific_decl_iterator & operator++()
Definition: DeclBase.h:2060
void setImplicit(bool I=true)
Definition: DeclBase.h:548
Represents a function declaration or definition.
Definition: Decl.h:1739
redecl_iterator operator++(int)
Definition: DeclBase.h:922
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:871
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:2008
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:937
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:887
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:752
const char * getDeclKindName() const
Definition: DeclBase.cpp:123
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:240
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c.h:68
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:868
bool isClosure() const
Definition: DeclBase.h:1785
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:1813
virtual Stmt * getBody() const
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: DeclBase.h:979
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:475
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
Module * getOwningModuleForLinkage(bool IgnoreLinkage=false) const
Get the module that owns this declaration for linkage purposes.
Definition: Decl.cpp:1481
attr_iterator attr_begin() const
Definition: DeclBase.h:494
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:518
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3361
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:331
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:54
friend bool operator==(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2072
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:410
specific_decl_iterator(DeclContext::decl_iterator C)
specific_decl_iterator - Construct a new iterator over a subset of the declarations the range [C...
Definition: DeclBase.h:2051
static void add(Kind k)
Definition: DeclBase.cpp:193
Not a friend object.
Definition: DeclBase.h:1095
Decl * getPreviousDecl()
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:953
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2459
bool isObjCContainer() const
Definition: DeclBase.h:1787
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:414
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
static void printGroup(Decl **Begin, unsigned NumDecls, raw_ostream &Out, const PrintingPolicy &Policy, unsigned Indentation=0)
bool isDeclInLexicalTraversal(const Decl *D) const
Determine whether the given declaration is stored in the list of declarations lexically within this c...
Definition: DeclBase.h:2338
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2435
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:2324
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:2093
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:792
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2481
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:254
unsigned Access
Access - Used by C++ decls for the access specifier.
Definition: DeclBase.h:321
redecl_iterator & operator++()
Definition: DeclBase.h:913
reference back() const
Definition: DeclBase.h:1235
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:214
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:747
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:380
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1997
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:119
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
reference front() const
Definition: DeclBase.h:1234
bool isInvalidDecl() const
Definition: DeclBase.h:542
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2077
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:450
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:211
BlockDeclBitfields BlockDeclBits
Definition: DeclBase.h:1698
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:731
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:24
Decl(Kind DK, EmptyShell Empty)
Definition: DeclBase.h:378
value_type operator->() const
Definition: DeclBase.h:1971
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:131
bool isLexicallyWithinFunctionOrMethod() const
Returns true if this declaration lexically is inside a function.
Definition: DeclBase.cpp:335
Represents a struct/union/class.
Definition: Decl.h:3602
CXXConstructorDeclBitfields CXXConstructorDeclBits
Definition: DeclBase.h:1694
void dumpColor() const
Definition: ASTDumper.cpp:2480
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:85
One of these records is kept for each identifier that is lexed.
void setHasExternalLexicalStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:2318
void print(raw_ostream &Out, unsigned Indentation=0, bool PrintInstantiation=false) const
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:347
LinkageSpecDeclBitfields LinkageSpecDeclBits
Definition: DeclBase.h:1697
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:1187
attr_iterator attr_end() const
Definition: DeclBase.h:497
specific_decl_iterator operator++(int)
Definition: DeclBase.h:2066
friend class DeclContext
Definition: DeclBase.h:243
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:1993
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:904
This declaration is a friend function.
Definition: DeclBase.h:153
bool isNamespace() const
Definition: DeclBase.h:1832
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:773
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:406
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:623
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:848
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:796
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1872
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:324
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:523
Describes a module or submodule.
Definition: Module.h:65
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;deprecated&#39;.
Definition: DeclBase.h:664
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2153
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1216
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:961
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:422
Namespaces, declared with &#39;namespace foo {}&#39;.
Definition: DeclBase.h:141
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:802
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:826
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:779
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1962
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:2129
static bool isStdNamespace(const DeclContext *DC)
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1097
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2039
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1239
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:2297
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1158
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:821
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2038
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:118
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:739
Represents a linkage specification.
Definition: DeclCXX.h:2823
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2505
bool isExported() const
Whether this declaration is exported (by virtue of being lexically within an ExportDecl or by being a...
Definition: DeclBase.cpp:434
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:891
Ordinary names.
Definition: DeclBase.h:145
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:396
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:73
NodeId Parent
Definition: ASTDiff.cpp:192
Decl * getNextDeclInContext()
Definition: DeclBase.h:424
bool canBeWeakImported(bool &IsDefinition) const
Determines whether this symbol can be weak-imported, e.g., whether it would be well-formed to add the...
Definition: DeclBase.cpp:655
bool hasAttr() const
Definition: DeclBase.h:531
DeclContextBitfields DeclContextBits
Definition: DeclBase.h:1688
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:103
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:589
This declaration is a C++ operator declared in a non-class context.
Definition: DeclBase.h:169
Objective C @protocol.
Definition: DeclBase.h:148
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2278
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2005
std::ptrdiff_t difference_type
Definition: DeclBase.h:905
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1777
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:961
This declaration is a friend class.
Definition: DeclBase.h:158
const Decl * getNonClosureContext() const
Definition: DeclBase.h:442
int64_t getID() const
Definition: DeclBase.cpp:957
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1768
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:876
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3867
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:475
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:2248
static bool classofKind(Kind K)
Definition: DeclBase.h:1120
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:704
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:2305
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
This declaration is an OpenMP user defined reduction construction.
Definition: DeclBase.h:179
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:547
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:722
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:968
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1200
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:425
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1053
bool isFileContext() const
Definition: DeclBase.h:1818
DeclContext * getDeclContext()
Definition: DeclBase.h:427
SourceLocation Begin
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
redecl_iterator redecls_end() const
Definition: DeclBase.h:949
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2422
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:614
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:488
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
const DeclContext * getParent() const
Definition: DeclBase.h:1755
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
reference operator[](size_t N) const
Definition: DeclBase.h:1236
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:384
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:419
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1025
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1988
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:327
const SourceManager & SM
Definition: Format.cpp:1490
FunctionDeclBitfields FunctionDeclBits
Definition: DeclBase.h:1693
const DeclContext * getDeclContext() const
Definition: DeclBase.h:432
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
reference operator*() const
Definition: DeclBase.h:910
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1104
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:806
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2330
AttrVec & getAttrs()
Definition: DeclBase.h:479
virtual bool hasBody() const
Returns true if this Decl represents a declaration for a body of code, such as a function or method d...
Definition: DeclBase.h:985
bool hasAttrs() const
Definition: DeclBase.h:473
filtered_decl_iterator & operator++()
Definition: DeclBase.h:2136
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2519
iterator::reference reference
Definition: DeclBase.h:1226
Abstract interface for external sources of AST nodes.
bool isTemplateDecl() const
returns true if this declaration is a template
Definition: DeclBase.cpp:226
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1745
This declaration has an owning module, but is globally visible (typically because its owning module i...
#define false
Definition: stdbool.h:33
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:895
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:641
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:586
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:137
all_lookups_iterator - An iterator that provides a view over the results of looking up every possible...
Definition: DeclLookups.h:29
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:784
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:103
The nullability qualifier is set when the nullability of the result or parameter was expressed via a ...
Definition: DeclBase.h:208
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3073
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
void setReferenced(bool R=true)
Definition: DeclBase.h:577
static bool classof(const DeclContext *D)
Definition: DeclBase.h:2354
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2117
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:2273
bool hasCachedLinkage() const
Definition: DeclBase.h:400
A friend of a previously-declared entity.
Definition: DeclBase.h:1096
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1202
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:2312
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2498
Linkage getCachedLinkage() const
Definition: DeclBase.h:392
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:695
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:928
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:2285
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:397
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:883
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2447
decl_iterator noload_decls_end() const
Definition: DeclBase.h:2009
void dropAttrs()
Definition: DeclBase.cpp:833
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c.h:76
virtual bool isOutOfLine() const
Determine whether this declaration is declared out of line (outside its semantic context).
Definition: Decl.cpp:99
bool isWeakImported() const
Determine whether this is a weak-imported symbol.
Definition: DeclBase.cpp:685
Defines various enumerations that describe declaration and type specifiers.
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1954
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:575
redecl_iterator redecls_begin() const
Definition: DeclBase.h:945
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:941
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2431
Dataflow Directional Tag Classes.
void updateOutOfDate(IdentifierInfo &II) const
Update a potentially out-of-date declaration.
Definition: DeclBase.cpp:63
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:399
bool isTopLevelDeclInObjCContainer() const
Whether this declaration is a top-level declaration (function, global variable, etc.) that is lexically inside an objc container definition.
Definition: DeclBase.h:582
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:972
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1011
bool isRecord() const
Definition: DeclBase.h:1827
attr_range attrs() const
Definition: DeclBase.h:490
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:932
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:355
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:487
AccessSpecifier getAccess() const
Definition: DeclBase.h:462
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:116
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:421
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:999
decl_iterator operator++(int)
Definition: DeclBase.h:1978
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1884
Represents an enum.
Definition: Decl.h:3335
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:126
EnumDeclBitfields EnumDeclBits
Definition: DeclBase.h:1690
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:767
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2017
This declaration is not owned by a module.
void setObjectOfFriendDecl(bool PerformFriendInjection=false)
Changes the namespace of this declaration to reflect that it&#39;s the object of a friend declaration...
Definition: DeclBase.h:1064
A dependently-generated diagnostic.
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it&#39;s a function-local extern declaration...
Definition: DeclBase.h:1035
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1915
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:562
static bool classof(const OMPClause *T)
static bool isFunctionOrMethod(const Decl *D)
isFunctionOrMethod - Return true if the given decl has function type (function or function-typed vari...
void setNonMemberOperator()
Specifies that this declaration is a C++ overloaded non-member.
Definition: DeclBase.h:1113
T * getAttr() const
Definition: DeclBase.h:527
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:707
virtual ~Decl()
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:2142
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1771
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:699
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1225
ObjCMethodDeclBitfields ObjCMethodDeclBits
Definition: DeclBase.h:1695
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:412
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:513
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2512
Defines the clang::SourceLocation class and associated facilities.
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: DeclBase.h:962
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2148
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:196
decl_iterator & operator++()
Definition: DeclBase.h:1973
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1177
bool setUseQualifiedLookup(bool use=true) const
Definition: DeclBase.h:2343
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1909
value_type operator->() const
Definition: DeclBase.h:911
RecordDeclBitfields RecordDeclBits
Definition: DeclBase.h:1691
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1895
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:368
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:887
void addAttr(Attr *A)
Definition: DeclBase.cpp:840
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:104
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2443
friend class CXXClassMemberWrapper
Definition: DeclBase.h:315
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1781
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:90
void dump() const
Definition: ASTDumper.cpp:2469
The top declaration context.
Definition: Decl.h:107
static void PrintStats()
Definition: DeclBase.cpp:169
This declaration is a function-local extern declaration of a variable or function.
Definition: DeclBase.h:176
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1158
static void EnableStatistics()
Definition: DeclBase.cpp:165
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1984
ObjCContainerDeclBitfields ObjCContainerDeclBits
Definition: DeclBase.h:1696
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:469
#define true
Definition: stdbool.h:32
A trivial tuple used to represent a source range.
bool isModulePrivate() const
Whether this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:596
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits
Definition: DeclBase.h:1692
This represents a decl that may have a name.
Definition: Decl.h:248
bool isTranslationUnit() const
Definition: DeclBase.h:1823
void dropAttr()
Definition: DeclBase.h:502
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:457
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:447
TemplateDecl * getDescribedTemplate() const
If this is a declaration that describes some template, this method returns that template declaration...
Definition: DeclBase.cpp:230
Represents C++ using-directive.
Definition: DeclCXX.h:2913
bool hasDefiningAttr() const
Return true if this declaration has an attribute which acts as definition of the entity, such as &#39;alias&#39; or &#39;ifunc&#39;.
Definition: DeclBase.cpp:471
bool isInStdNamespace() const
Definition: DeclBase.cpp:357
SourceLocation getBegin() const
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:361
bool isTemplated() const
Determine whether this declaration is a templated entity (whether it is.
Definition: DeclBase.cpp:243
This class handles loading and caching of source files into memory.
SourceLocation getBodyRBrace() const
getBodyRBrace - Gets the right brace of the body, if a body exists.
Definition: DeclBase.cpp:906
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:418
TagDeclBitfields TagDeclBits
Definition: DeclBase.h:1689
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:1988
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1903
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:673
decl_iterator decls_end() const
Definition: DeclBase.h:1999
This declaration is a using declaration.
Definition: DeclBase.h:164
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2116
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:864
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1170