clang  10.0.0git
DeclBase.h
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1 //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the Decl and DeclContext interfaces.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_AST_DECLBASE_H
14 #define LLVM_CLANG_AST_DECLBASE_H
15 
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 BlockDecl;
46 class DeclContext;
47 class ExternalSourceSymbolAttr;
48 class FunctionDecl;
49 class FunctionType;
50 class IdentifierInfo;
51 enum Linkage : unsigned char;
52 class LinkageSpecDecl;
53 class Module;
54 class NamedDecl;
55 class ObjCCategoryDecl;
56 class ObjCCategoryImplDecl;
57 class ObjCContainerDecl;
58 class ObjCImplDecl;
59 class ObjCImplementationDecl;
60 class ObjCInterfaceDecl;
61 class ObjCMethodDecl;
62 class ObjCProtocolDecl;
63 struct PrintingPolicy;
64 class RecordDecl;
65 class SourceManager;
66 class Stmt;
67 class StoredDeclsMap;
68 class TemplateDecl;
69 class TranslationUnitDecl;
70 class UsingDirectiveDecl;
71 
72 /// Captures the result of checking the availability of a
73 /// declaration.
79 };
80 
81 /// Decl - This represents one declaration (or definition), e.g. a variable,
82 /// typedef, function, struct, etc.
83 ///
84 /// Note: There are objects tacked on before the *beginning* of Decl
85 /// (and its subclasses) in its Decl::operator new(). Proper alignment
86 /// of all subclasses (not requiring more than the alignment of Decl) is
87 /// asserted in DeclBase.cpp.
88 class alignas(8) Decl {
89 public:
90  /// Lists the kind of concrete classes of Decl.
91  enum Kind {
92 #define DECL(DERIVED, BASE) DERIVED,
93 #define ABSTRACT_DECL(DECL)
94 #define DECL_RANGE(BASE, START, END) \
95  first##BASE = START, last##BASE = END,
96 #define LAST_DECL_RANGE(BASE, START, END) \
97  first##BASE = START, last##BASE = END
98 #include "clang/AST/DeclNodes.inc"
99  };
100 
101  /// A placeholder type used to construct an empty shell of a
102  /// decl-derived type that will be filled in later (e.g., by some
103  /// deserialization method).
104  struct EmptyShell {};
105 
106  /// IdentifierNamespace - The different namespaces in which
107  /// declarations may appear. According to C99 6.2.3, there are
108  /// four namespaces, labels, tags, members and ordinary
109  /// identifiers. C++ describes lookup completely differently:
110  /// certain lookups merely "ignore" certain kinds of declarations,
111  /// usually based on whether the declaration is of a type, etc.
112  ///
113  /// These are meant as bitmasks, so that searches in
114  /// C++ can look into the "tag" namespace during ordinary lookup.
115  ///
116  /// Decl currently provides 15 bits of IDNS bits.
118  /// Labels, declared with 'x:' and referenced with 'goto x'.
119  IDNS_Label = 0x0001,
120 
121  /// Tags, declared with 'struct foo;' and referenced with
122  /// 'struct foo'. All tags are also types. This is what
123  /// elaborated-type-specifiers look for in C.
124  /// This also contains names that conflict with tags in the
125  /// same scope but that are otherwise ordinary names (non-type
126  /// template parameters and indirect field declarations).
127  IDNS_Tag = 0x0002,
128 
129  /// Types, declared with 'struct foo', typedefs, etc.
130  /// This is what elaborated-type-specifiers look for in C++,
131  /// but note that it's ill-formed to find a non-tag.
132  IDNS_Type = 0x0004,
133 
134  /// Members, declared with object declarations within tag
135  /// definitions. In C, these can only be found by "qualified"
136  /// lookup in member expressions. In C++, they're found by
137  /// normal lookup.
138  IDNS_Member = 0x0008,
139 
140  /// Namespaces, declared with 'namespace foo {}'.
141  /// Lookup for nested-name-specifiers find these.
142  IDNS_Namespace = 0x0010,
143 
144  /// Ordinary names. In C, everything that's not a label, tag,
145  /// member, or function-local extern ends up here.
146  IDNS_Ordinary = 0x0020,
147 
148  /// Objective C \@protocol.
150 
151  /// This declaration is a friend function. A friend function
152  /// declaration is always in this namespace but may also be in
153  /// IDNS_Ordinary if it was previously declared.
155 
156  /// This declaration is a friend class. A friend class
157  /// declaration is always in this namespace but may also be in
158  /// IDNS_Tag|IDNS_Type if it was previously declared.
159  IDNS_TagFriend = 0x0100,
160 
161  /// This declaration is a using declaration. A using declaration
162  /// *introduces* a number of other declarations into the current
163  /// scope, and those declarations use the IDNS of their targets,
164  /// but the actual using declarations go in this namespace.
165  IDNS_Using = 0x0200,
166 
167  /// This declaration is a C++ operator declared in a non-class
168  /// context. All such operators are also in IDNS_Ordinary.
169  /// C++ lexical operator lookup looks for these.
171 
172  /// This declaration is a function-local extern declaration of a
173  /// variable or function. This may also be IDNS_Ordinary if it
174  /// has been declared outside any function. These act mostly like
175  /// invisible friend declarations, but are also visible to unqualified
176  /// lookup within the scope of the declaring function.
178 
179  /// This declaration is an OpenMP user defined reduction construction.
181 
182  /// This declaration is an OpenMP user defined mapper.
183  IDNS_OMPMapper = 0x2000,
184  };
185 
186  /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
187  /// parameter types in method declarations. Other than remembering
188  /// them and mangling them into the method's signature string, these
189  /// are ignored by the compiler; they are consumed by certain
190  /// remote-messaging frameworks.
191  ///
192  /// in, inout, and out are mutually exclusive and apply only to
193  /// method parameters. bycopy and byref are mutually exclusive and
194  /// apply only to method parameters (?). oneway applies only to
195  /// results. All of these expect their corresponding parameter to
196  /// have a particular type. None of this is currently enforced by
197  /// clang.
198  ///
199  /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
202  OBJC_TQ_In = 0x1,
204  OBJC_TQ_Out = 0x4,
208 
209  /// The nullability qualifier is set when the nullability of the
210  /// result or parameter was expressed via a context-sensitive
211  /// keyword.
213  };
214 
215  /// The kind of ownership a declaration has, for visibility purposes.
216  /// This enumeration is designed such that higher values represent higher
217  /// levels of name hiding.
218  enum class ModuleOwnershipKind : unsigned {
219  /// This declaration is not owned by a module.
220  Unowned,
221 
222  /// This declaration has an owning module, but is globally visible
223  /// (typically because its owning module is visible and we know that
224  /// modules cannot later become hidden in this compilation).
225  /// After serialization and deserialization, this will be converted
226  /// to VisibleWhenImported.
227  Visible,
228 
229  /// This declaration has an owning module, and is visible when that
230  /// module is imported.
231  VisibleWhenImported,
232 
233  /// This declaration has an owning module, but is only visible to
234  /// lookups that occur within that module.
235  ModulePrivate
236  };
237 
238 protected:
239  /// The next declaration within the same lexical
240  /// DeclContext. These pointers form the linked list that is
241  /// traversed via DeclContext's decls_begin()/decls_end().
242  ///
243  /// The extra two bits are used for the ModuleOwnershipKind.
244  llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;
245 
246 private:
247  friend class DeclContext;
248 
249  struct MultipleDC {
250  DeclContext *SemanticDC;
251  DeclContext *LexicalDC;
252  };
253 
254  /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
255  /// For declarations that don't contain C++ scope specifiers, it contains
256  /// the DeclContext where the Decl was declared.
257  /// For declarations with C++ scope specifiers, it contains a MultipleDC*
258  /// with the context where it semantically belongs (SemanticDC) and the
259  /// context where it was lexically declared (LexicalDC).
260  /// e.g.:
261  ///
262  /// namespace A {
263  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
264  /// }
265  /// void A::f(); // SemanticDC == namespace 'A'
266  /// // LexicalDC == global namespace
267  llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
268 
269  bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
270  bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
271 
272  MultipleDC *getMultipleDC() const {
273  return DeclCtx.get<MultipleDC*>();
274  }
275 
276  DeclContext *getSemanticDC() const {
277  return DeclCtx.get<DeclContext*>();
278  }
279 
280  /// Loc - The location of this decl.
281  SourceLocation Loc;
282 
283  /// DeclKind - This indicates which class this is.
284  unsigned DeclKind : 7;
285 
286  /// InvalidDecl - This indicates a semantic error occurred.
287  unsigned InvalidDecl : 1;
288 
289  /// HasAttrs - This indicates whether the decl has attributes or not.
290  unsigned HasAttrs : 1;
291 
292  /// Implicit - Whether this declaration was implicitly generated by
293  /// the implementation rather than explicitly written by the user.
294  unsigned Implicit : 1;
295 
296  /// Whether this declaration was "used", meaning that a definition is
297  /// required.
298  unsigned Used : 1;
299 
300  /// Whether this declaration was "referenced".
301  /// The difference with 'Used' is whether the reference appears in a
302  /// evaluated context or not, e.g. functions used in uninstantiated templates
303  /// are regarded as "referenced" but not "used".
304  unsigned Referenced : 1;
305 
306  /// Whether this declaration is a top-level declaration (function,
307  /// global variable, etc.) that is lexically inside an objc container
308  /// definition.
309  unsigned TopLevelDeclInObjCContainer : 1;
310 
311  /// Whether statistic collection is enabled.
312  static bool StatisticsEnabled;
313 
314 protected:
315  friend class ASTDeclReader;
316  friend class ASTDeclWriter;
317  friend class ASTNodeImporter;
318  friend class ASTReader;
319  friend class CXXClassMemberWrapper;
320  friend class LinkageComputer;
321  template<typename decl_type> friend class Redeclarable;
322 
323  /// Access - Used by C++ decls for the access specifier.
324  // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
325  unsigned Access : 2;
326 
327  /// Whether this declaration was loaded from an AST file.
328  unsigned FromASTFile : 1;
329 
330  /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
331  unsigned IdentifierNamespace : 14;
332 
333  /// If 0, we have not computed the linkage of this declaration.
334  /// Otherwise, it is the linkage + 1.
335  mutable unsigned CacheValidAndLinkage : 3;
336 
337  /// Allocate memory for a deserialized declaration.
338  ///
339  /// This routine must be used to allocate memory for any declaration that is
340  /// deserialized from a module file.
341  ///
342  /// \param Size The size of the allocated object.
343  /// \param Ctx The context in which we will allocate memory.
344  /// \param ID The global ID of the deserialized declaration.
345  /// \param Extra The amount of extra space to allocate after the object.
346  void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
347  std::size_t Extra = 0);
348 
349  /// Allocate memory for a non-deserialized declaration.
350  void *operator new(std::size_t Size, const ASTContext &Ctx,
351  DeclContext *Parent, std::size_t Extra = 0);
352 
353 private:
354  bool AccessDeclContextSanity() const;
355 
356  /// Get the module ownership kind to use for a local lexical child of \p DC,
357  /// which may be either a local or (rarely) an imported declaration.
358  static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
359  if (DC) {
360  auto *D = cast<Decl>(DC);
361  auto MOK = D->getModuleOwnershipKind();
362  if (MOK != ModuleOwnershipKind::Unowned &&
363  (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
364  return MOK;
365  // If D is not local and we have no local module storage, then we don't
366  // need to track module ownership at all.
367  }
369  }
370 
371 public:
372  Decl() = delete;
373  Decl(const Decl&) = delete;
374  Decl(Decl &&) = delete;
375  Decl &operator=(const Decl&) = delete;
376  Decl &operator=(Decl&&) = delete;
377 
378 protected:
380  : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
381  DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false),
382  Implicit(false), Used(false), Referenced(false),
383  TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
386  if (StatisticsEnabled) add(DK);
387  }
388 
389  Decl(Kind DK, EmptyShell Empty)
390  : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
391  Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
395  if (StatisticsEnabled) add(DK);
396  }
397 
398  virtual ~Decl();
399 
400  /// Update a potentially out-of-date declaration.
401  void updateOutOfDate(IdentifierInfo &II) const;
402 
404  return Linkage(CacheValidAndLinkage - 1);
405  }
406 
407  void setCachedLinkage(Linkage L) const {
408  CacheValidAndLinkage = L + 1;
409  }
410 
411  bool hasCachedLinkage() const {
412  return CacheValidAndLinkage;
413  }
414 
415 public:
416  /// Source range that this declaration covers.
417  virtual SourceRange getSourceRange() const LLVM_READONLY {
418  return SourceRange(getLocation(), getLocation());
419  }
420 
421  SourceLocation getBeginLoc() const LLVM_READONLY {
422  return getSourceRange().getBegin();
423  }
424 
425  SourceLocation getEndLoc() const LLVM_READONLY {
426  return getSourceRange().getEnd();
427  }
428 
429  SourceLocation getLocation() const { return Loc; }
430  void setLocation(SourceLocation L) { Loc = L; }
431 
432  Kind getKind() const { return static_cast<Kind>(DeclKind); }
433  const char *getDeclKindName() const;
434 
435  Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
436  const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
437 
439  if (isInSemaDC())
440  return getSemanticDC();
441  return getMultipleDC()->SemanticDC;
442  }
443  const DeclContext *getDeclContext() const {
444  return const_cast<Decl*>(this)->getDeclContext();
445  }
446 
447  /// Find the innermost non-closure ancestor of this declaration,
448  /// walking up through blocks, lambdas, etc. If that ancestor is
449  /// not a code context (!isFunctionOrMethod()), returns null.
450  ///
451  /// A declaration may be its own non-closure context.
453  const Decl *getNonClosureContext() const {
454  return const_cast<Decl*>(this)->getNonClosureContext();
455  }
456 
459  return const_cast<Decl*>(this)->getTranslationUnitDecl();
460  }
461 
462  bool isInAnonymousNamespace() const;
463 
464  bool isInStdNamespace() const;
465 
466  ASTContext &getASTContext() const LLVM_READONLY;
467 
469  Access = AS;
470  assert(AccessDeclContextSanity());
471  }
472 
474  assert(AccessDeclContextSanity());
475  return AccessSpecifier(Access);
476  }
477 
478  /// Retrieve the access specifier for this declaration, even though
479  /// it may not yet have been properly set.
481  return AccessSpecifier(Access);
482  }
483 
484  bool hasAttrs() const { return HasAttrs; }
485 
486  void setAttrs(const AttrVec& Attrs) {
487  return setAttrsImpl(Attrs, getASTContext());
488  }
489 
491  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
492  }
493 
494  const AttrVec &getAttrs() const;
495  void dropAttrs();
496  void addAttr(Attr *A);
497 
498  using attr_iterator = AttrVec::const_iterator;
499  using attr_range = llvm::iterator_range<attr_iterator>;
500 
501  attr_range attrs() const {
502  return attr_range(attr_begin(), attr_end());
503  }
504 
506  return hasAttrs() ? getAttrs().begin() : nullptr;
507  }
509  return hasAttrs() ? getAttrs().end() : nullptr;
510  }
511 
512  template <typename T>
513  void dropAttr() {
514  if (!HasAttrs) return;
515 
516  AttrVec &Vec = getAttrs();
517  Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
518 
519  if (Vec.empty())
520  HasAttrs = false;
521  }
522 
523  template <typename T>
524  llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
525  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
526  }
527 
528  template <typename T>
531  }
532 
533  template <typename T>
536  }
537 
538  template<typename T> T *getAttr() const {
539  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
540  }
541 
542  template<typename T> bool hasAttr() const {
543  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
544  }
545 
546  /// getMaxAlignment - return the maximum alignment specified by attributes
547  /// on this decl, 0 if there are none.
548  unsigned getMaxAlignment() const;
549 
550  /// setInvalidDecl - Indicates the Decl had a semantic error. This
551  /// allows for graceful error recovery.
552  void setInvalidDecl(bool Invalid = true);
553  bool isInvalidDecl() const { return (bool) InvalidDecl; }
554 
555  /// isImplicit - Indicates whether the declaration was implicitly
556  /// generated by the implementation. If false, this declaration
557  /// was written explicitly in the source code.
558  bool isImplicit() const { return Implicit; }
559  void setImplicit(bool I = true) { Implicit = I; }
560 
561  /// Whether *any* (re-)declaration of the entity was used, meaning that
562  /// a definition is required.
563  ///
564  /// \param CheckUsedAttr When true, also consider the "used" attribute
565  /// (in addition to the "used" bit set by \c setUsed()) when determining
566  /// whether the function is used.
567  bool isUsed(bool CheckUsedAttr = true) const;
568 
569  /// Set whether the declaration is used, in the sense of odr-use.
570  ///
571  /// This should only be used immediately after creating a declaration.
572  /// It intentionally doesn't notify any listeners.
573  void setIsUsed() { getCanonicalDecl()->Used = true; }
574 
575  /// Mark the declaration used, in the sense of odr-use.
576  ///
577  /// This notifies any mutation listeners in addition to setting a bit
578  /// indicating the declaration is used.
579  void markUsed(ASTContext &C);
580 
581  /// Whether any declaration of this entity was referenced.
582  bool isReferenced() const;
583 
584  /// Whether this declaration was referenced. This should not be relied
585  /// upon for anything other than debugging.
586  bool isThisDeclarationReferenced() const { return Referenced; }
587 
588  void setReferenced(bool R = true) { Referenced = R; }
589 
590  /// Whether this declaration is a top-level declaration (function,
591  /// global variable, etc.) that is lexically inside an objc container
592  /// definition.
594  return TopLevelDeclInObjCContainer;
595  }
596 
597  void setTopLevelDeclInObjCContainer(bool V = true) {
598  TopLevelDeclInObjCContainer = V;
599  }
600 
601  /// Looks on this and related declarations for an applicable
602  /// external source symbol attribute.
603  ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;
604 
605  /// Whether this declaration was marked as being private to the
606  /// module in which it was defined.
607  bool isModulePrivate() const {
609  }
610 
611  /// Return true if this declaration has an attribute which acts as
612  /// definition of the entity, such as 'alias' or 'ifunc'.
613  bool hasDefiningAttr() const;
614 
615  /// Return this declaration's defining attribute if it has one.
616  const Attr *getDefiningAttr() const;
617 
618 protected:
619  /// Specify that this declaration was marked as being private
620  /// to the module in which it was defined.
622  // The module-private specifier has no effect on unowned declarations.
623  // FIXME: We should track this in some way for source fidelity.
625  return;
627  }
628 
629  /// Set the owning module ID.
630  void setOwningModuleID(unsigned ID) {
631  assert(isFromASTFile() && "Only works on a deserialized declaration");
632  *((unsigned*)this - 2) = ID;
633  }
634 
635 public:
636  /// Determine the availability of the given declaration.
637  ///
638  /// This routine will determine the most restrictive availability of
639  /// the given declaration (e.g., preferring 'unavailable' to
640  /// 'deprecated').
641  ///
642  /// \param Message If non-NULL and the result is not \c
643  /// AR_Available, will be set to a (possibly empty) message
644  /// describing why the declaration has not been introduced, is
645  /// deprecated, or is unavailable.
646  ///
647  /// \param EnclosingVersion The version to compare with. If empty, assume the
648  /// deployment target version.
649  ///
650  /// \param RealizedPlatform If non-NULL and the availability result is found
651  /// in an available attribute it will set to the platform which is written in
652  /// the available attribute.
654  getAvailability(std::string *Message = nullptr,
655  VersionTuple EnclosingVersion = VersionTuple(),
656  StringRef *RealizedPlatform = nullptr) const;
657 
658  /// Retrieve the version of the target platform in which this
659  /// declaration was introduced.
660  ///
661  /// \returns An empty version tuple if this declaration has no 'introduced'
662  /// availability attributes, or the version tuple that's specified in the
663  /// attribute otherwise.
664  VersionTuple getVersionIntroduced() const;
665 
666  /// Determine whether this declaration is marked 'deprecated'.
667  ///
668  /// \param Message If non-NULL and the declaration is deprecated,
669  /// this will be set to the message describing why the declaration
670  /// was deprecated (which may be empty).
671  bool isDeprecated(std::string *Message = nullptr) const {
672  return getAvailability(Message) == AR_Deprecated;
673  }
674 
675  /// Determine whether this declaration is marked 'unavailable'.
676  ///
677  /// \param Message If non-NULL and the declaration is unavailable,
678  /// this will be set to the message describing why the declaration
679  /// was made unavailable (which may be empty).
680  bool isUnavailable(std::string *Message = nullptr) const {
681  return getAvailability(Message) == AR_Unavailable;
682  }
683 
684  /// Determine whether this is a weak-imported symbol.
685  ///
686  /// Weak-imported symbols are typically marked with the
687  /// 'weak_import' attribute, but may also be marked with an
688  /// 'availability' attribute where we're targing a platform prior to
689  /// the introduction of this feature.
690  bool isWeakImported() const;
691 
692  /// Determines whether this symbol can be weak-imported,
693  /// e.g., whether it would be well-formed to add the weak_import
694  /// attribute.
695  ///
696  /// \param IsDefinition Set to \c true to indicate that this
697  /// declaration cannot be weak-imported because it has a definition.
698  bool canBeWeakImported(bool &IsDefinition) const;
699 
700  /// Determine whether this declaration came from an AST file (such as
701  /// a precompiled header or module) rather than having been parsed.
702  bool isFromASTFile() const { return FromASTFile; }
703 
704  /// Retrieve the global declaration ID associated with this
705  /// declaration, which specifies where this Decl was loaded from.
706  unsigned getGlobalID() const {
707  if (isFromASTFile())
708  return *((const unsigned*)this - 1);
709  return 0;
710  }
711 
712  /// Retrieve the global ID of the module that owns this particular
713  /// declaration.
714  unsigned getOwningModuleID() const {
715  if (isFromASTFile())
716  return *((const unsigned*)this - 2);
717  return 0;
718  }
719 
720 private:
721  Module *getOwningModuleSlow() const;
722 
723 protected:
724  bool hasLocalOwningModuleStorage() const;
725 
726 public:
727  /// Get the imported owning module, if this decl is from an imported
728  /// (non-local) module.
730  if (!isFromASTFile() || !hasOwningModule())
731  return nullptr;
732 
733  return getOwningModuleSlow();
734  }
735 
736  /// Get the local owning module, if known. Returns nullptr if owner is
737  /// not yet known or declaration is not from a module.
739  if (isFromASTFile() || !hasOwningModule())
740  return nullptr;
741 
742  assert(hasLocalOwningModuleStorage() &&
743  "owned local decl but no local module storage");
744  return reinterpret_cast<Module *const *>(this)[-1];
745  }
747  assert(!isFromASTFile() && hasOwningModule() &&
749  "should not have a cached owning module");
750  reinterpret_cast<Module **>(this)[-1] = M;
751  }
752 
753  /// Is this declaration owned by some module?
754  bool hasOwningModule() const {
756  }
757 
758  /// Get the module that owns this declaration (for visibility purposes).
761  }
762 
763  /// Get the module that owns this declaration for linkage purposes.
764  /// There only ever is such a module under the C++ Modules TS.
765  ///
766  /// \param IgnoreLinkage Ignore the linkage of the entity; assume that
767  /// all declarations in a global module fragment are unowned.
768  Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;
769 
770  /// Determine whether this declaration might be hidden from name
771  /// lookup. Note that the declaration might be visible even if this returns
772  /// \c false, if the owning module is visible within the query context.
773  // FIXME: Rename this to make it clearer what it does.
774  bool isHidden() const {
776  }
777 
778  /// Set that this declaration is globally visible, even if it came from a
779  /// module that is not visible.
781  if (isHidden())
783  }
784 
785  /// Get the kind of module ownership for this declaration.
787  return NextInContextAndBits.getInt();
788  }
789 
790  /// Set whether this declaration is hidden from name lookup.
795  "no storage available for owning module for this declaration");
796  NextInContextAndBits.setInt(MOK);
797  }
798 
799  unsigned getIdentifierNamespace() const {
800  return IdentifierNamespace;
801  }
802 
803  bool isInIdentifierNamespace(unsigned NS) const {
804  return getIdentifierNamespace() & NS;
805  }
806 
807  static unsigned getIdentifierNamespaceForKind(Kind DK);
808 
811  }
812 
813  static bool isTagIdentifierNamespace(unsigned NS) {
814  // TagDecls have Tag and Type set and may also have TagFriend.
815  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
816  }
817 
818  /// getLexicalDeclContext - The declaration context where this Decl was
819  /// lexically declared (LexicalDC). May be different from
820  /// getDeclContext() (SemanticDC).
821  /// e.g.:
822  ///
823  /// namespace A {
824  /// void f(); // SemanticDC == LexicalDC == 'namespace A'
825  /// }
826  /// void A::f(); // SemanticDC == namespace 'A'
827  /// // LexicalDC == global namespace
829  if (isInSemaDC())
830  return getSemanticDC();
831  return getMultipleDC()->LexicalDC;
832  }
834  return const_cast<Decl*>(this)->getLexicalDeclContext();
835  }
836 
837  /// Determine whether this declaration is declared out of line (outside its
838  /// semantic context).
839  virtual bool isOutOfLine() const;
840 
841  /// setDeclContext - Set both the semantic and lexical DeclContext
842  /// to DC.
843  void setDeclContext(DeclContext *DC);
844 
846 
847  /// Determine whether this declaration is a templated entity (whether it is
848  // within the scope of a template parameter).
849  bool isTemplated() const;
850 
851  /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
852  /// scoped decl is defined outside the current function or method. This is
853  /// roughly global variables and functions, but also handles enums (which
854  /// could be defined inside or outside a function etc).
856  return getParentFunctionOrMethod() == nullptr;
857  }
858 
859  /// Returns true if this declaration lexically is inside a function.
860  /// It recognizes non-defining declarations as well as members of local
861  /// classes:
862  /// \code
863  /// void foo() { void bar(); }
864  /// void foo2() { class ABC { void bar(); }; }
865  /// \endcode
867 
868  /// If this decl is defined inside a function/method/block it returns
869  /// the corresponding DeclContext, otherwise it returns null.
870  const DeclContext *getParentFunctionOrMethod() const;
872  return const_cast<DeclContext*>(
873  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
874  }
875 
876  /// Retrieves the "canonical" declaration of the given declaration.
877  virtual Decl *getCanonicalDecl() { return this; }
878  const Decl *getCanonicalDecl() const {
879  return const_cast<Decl*>(this)->getCanonicalDecl();
880  }
881 
882  /// Whether this particular Decl is a canonical one.
883  bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
884 
885 protected:
886  /// Returns the next redeclaration or itself if this is the only decl.
887  ///
888  /// Decl subclasses that can be redeclared should override this method so that
889  /// Decl::redecl_iterator can iterate over them.
890  virtual Decl *getNextRedeclarationImpl() { return this; }
891 
892  /// Implementation of getPreviousDecl(), to be overridden by any
893  /// subclass that has a redeclaration chain.
894  virtual Decl *getPreviousDeclImpl() { return nullptr; }
895 
896  /// Implementation of getMostRecentDecl(), to be overridden by any
897  /// subclass that has a redeclaration chain.
898  virtual Decl *getMostRecentDeclImpl() { return this; }
899 
900 public:
901  /// Iterates through all the redeclarations of the same decl.
903  /// Current - The current declaration.
904  Decl *Current = nullptr;
905  Decl *Starter;
906 
907  public:
908  using value_type = Decl *;
909  using reference = const value_type &;
910  using pointer = const value_type *;
911  using iterator_category = std::forward_iterator_tag;
913 
914  redecl_iterator() = default;
915  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}
916 
917  reference operator*() const { return Current; }
918  value_type operator->() const { return Current; }
919 
921  assert(Current && "Advancing while iterator has reached end");
922  // Get either previous decl or latest decl.
923  Decl *Next = Current->getNextRedeclarationImpl();
924  assert(Next && "Should return next redeclaration or itself, never null!");
925  Current = (Next != Starter) ? Next : nullptr;
926  return *this;
927  }
928 
930  redecl_iterator tmp(*this);
931  ++(*this);
932  return tmp;
933  }
934 
936  return x.Current == y.Current;
937  }
938 
940  return x.Current != y.Current;
941  }
942  };
943 
944  using redecl_range = llvm::iterator_range<redecl_iterator>;
945 
946  /// Returns an iterator range for all the redeclarations of the same
947  /// decl. It will iterate at least once (when this decl is the only one).
950  }
951 
953  return redecl_iterator(const_cast<Decl *>(this));
954  }
955 
957 
958  /// Retrieve the previous declaration that declares the same entity
959  /// as this declaration, or NULL if there is no previous declaration.
961 
962  /// Retrieve the previous declaration that declares the same entity
963  /// as this declaration, or NULL if there is no previous declaration.
964  const Decl *getPreviousDecl() const {
965  return const_cast<Decl *>(this)->getPreviousDeclImpl();
966  }
967 
968  /// True if this is the first declaration in its redeclaration chain.
969  bool isFirstDecl() const {
970  return getPreviousDecl() == nullptr;
971  }
972 
973  /// Retrieve the most recent declaration that declares the same entity
974  /// as this declaration (which may be this declaration).
976 
977  /// Retrieve the most recent declaration that declares the same entity
978  /// as this declaration (which may be this declaration).
979  const Decl *getMostRecentDecl() const {
980  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
981  }
982 
983  /// getBody - If this Decl represents a declaration for a body of code,
984  /// such as a function or method definition, this method returns the
985  /// top-level Stmt* of that body. Otherwise this method returns null.
986  virtual Stmt* getBody() const { return nullptr; }
987 
988  /// Returns true if this \c Decl represents a declaration for a body of
989  /// code, such as a function or method definition.
990  /// Note that \c hasBody can also return true if any redeclaration of this
991  /// \c Decl represents a declaration for a body of code.
992  virtual bool hasBody() const { return getBody() != nullptr; }
993 
994  /// getBodyRBrace - Gets the right brace of the body, if a body exists.
995  /// This works whether the body is a CompoundStmt or a CXXTryStmt.
997 
998  // global temp stats (until we have a per-module visitor)
999  static void add(Kind k);
1000  static void EnableStatistics();
1001  static void PrintStats();
1002 
1003  /// isTemplateParameter - Determines whether this declaration is a
1004  /// template parameter.
1005  bool isTemplateParameter() const;
1006 
1007  /// isTemplateParameter - Determines whether this declaration is a
1008  /// template parameter pack.
1009  bool isTemplateParameterPack() const;
1010 
1011  /// Whether this declaration is a parameter pack.
1012  bool isParameterPack() const;
1013 
1014  /// returns true if this declaration is a template
1015  bool isTemplateDecl() const;
1016 
1017  /// Whether this declaration is a function or function template.
1019  return (DeclKind >= Decl::firstFunction &&
1020  DeclKind <= Decl::lastFunction) ||
1021  DeclKind == FunctionTemplate;
1022  }
1023 
1024  /// If this is a declaration that describes some template, this
1025  /// method returns that template declaration.
1027 
1028  /// Returns the function itself, or the templated function if this is a
1029  /// function template.
1030  FunctionDecl *getAsFunction() LLVM_READONLY;
1031 
1032  const FunctionDecl *getAsFunction() const {
1033  return const_cast<Decl *>(this)->getAsFunction();
1034  }
1035 
1036  /// Changes the namespace of this declaration to reflect that it's
1037  /// a function-local extern declaration.
1038  ///
1039  /// These declarations appear in the lexical context of the extern
1040  /// declaration, but in the semantic context of the enclosing namespace
1041  /// scope.
1043  Decl *Prev = getPreviousDecl();
1045 
1046  // It's OK for the declaration to still have the "invisible friend" flag or
1047  // the "conflicts with tag declarations in this scope" flag for the outer
1048  // scope.
1049  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&
1050  "namespace is not ordinary");
1051 
1053  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
1055  }
1056 
1057  /// Determine whether this is a block-scope declaration with linkage.
1058  /// This will either be a local variable declaration declared 'extern', or a
1059  /// local function declaration.
1062  }
1063 
1064  /// Changes the namespace of this declaration to reflect that it's
1065  /// the object of a friend declaration.
1066  ///
1067  /// These declarations appear in the lexical context of the friending
1068  /// class, but in the semantic context of the actual entity. This property
1069  /// applies only to a specific decl object; other redeclarations of the
1070  /// same entity may not (and probably don't) share this property.
1071  void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
1072  unsigned OldNS = IdentifierNamespace;
1073  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
1076  "namespace includes neither ordinary nor tag");
1077  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
1080  "namespace includes other than ordinary or tag");
1081 
1082  Decl *Prev = getPreviousDecl();
1084 
1085  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
1087  if (PerformFriendInjection ||
1088  (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
1090  }
1091 
1092  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend |
1095  if (PerformFriendInjection ||
1096  (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
1098  }
1099  }
1100 
1102  FOK_None, ///< Not a friend object.
1103  FOK_Declared, ///< A friend of a previously-declared entity.
1104  FOK_Undeclared ///< A friend of a previously-undeclared entity.
1105  };
1106 
1107  /// Determines whether this declaration is the object of a
1108  /// friend declaration and, if so, what kind.
1109  ///
1110  /// There is currently no direct way to find the associated FriendDecl.
1112  unsigned mask =
1114  if (!mask) return FOK_None;
1116  : FOK_Undeclared);
1117  }
1118 
1119  /// Specifies that this declaration is a C++ overloaded non-member.
1121  assert(getKind() == Function || getKind() == FunctionTemplate);
1122  assert((IdentifierNamespace & IDNS_Ordinary) &&
1123  "visible non-member operators should be in ordinary namespace");
1125  }
1126 
1127  static bool classofKind(Kind K) { return true; }
1128  static DeclContext *castToDeclContext(const Decl *);
1129  static Decl *castFromDeclContext(const DeclContext *);
1130 
1131  void print(raw_ostream &Out, unsigned Indentation = 0,
1132  bool PrintInstantiation = false) const;
1133  void print(raw_ostream &Out, const PrintingPolicy &Policy,
1134  unsigned Indentation = 0, bool PrintInstantiation = false) const;
1135  static void printGroup(Decl** Begin, unsigned NumDecls,
1136  raw_ostream &Out, const PrintingPolicy &Policy,
1137  unsigned Indentation = 0);
1138 
1139  // Debuggers don't usually respect default arguments.
1140  void dump() const;
1141 
1142  // Same as dump(), but forces color printing.
1143  void dumpColor() const;
1144 
1145  void dump(raw_ostream &Out, bool Deserialize = false,
1146  ASTDumpOutputFormat OutputFormat = ADOF_Default) const;
1147 
1148  /// \return Unique reproducible object identifier
1149  int64_t getID() const;
1150 
1151  /// Looks through the Decl's underlying type to extract a FunctionType
1152  /// when possible. Will return null if the type underlying the Decl does not
1153  /// have a FunctionType.
1154  const FunctionType *getFunctionType(bool BlocksToo = true) const;
1155 
1156 private:
1157  void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
1158  void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
1159  ASTContext &Ctx);
1160 
1161 protected:
1163 };
1164 
1165 /// Determine whether two declarations declare the same entity.
1166 inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1167  if (!D1 || !D2)
1168  return false;
1169 
1170  if (D1 == D2)
1171  return true;
1172 
1173  return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1174 }
1175 
1176 /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1177 /// doing something to a specific decl.
1178 class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1179  const Decl *TheDecl;
1180  SourceLocation Loc;
1181  SourceManager &SM;
1182  const char *Message;
1183 
1184 public:
1186  SourceManager &sm, const char *Msg)
1187  : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1188 
1189  void print(raw_ostream &OS) const override;
1190 };
1191 
1192 /// The results of name lookup within a DeclContext. This is either a
1193 /// single result (with no stable storage) or a collection of results (with
1194 /// stable storage provided by the lookup table).
1197 
1198  ResultTy Result;
1199 
1200  // If there is only one lookup result, it would be invalidated by
1201  // reallocations of the name table, so store it separately.
1202  NamedDecl *Single = nullptr;
1203 
1204  static NamedDecl *const SingleElementDummyList;
1205 
1206 public:
1207  DeclContextLookupResult() = default;
1209  : Result(Result) {}
1211  : Result(SingleElementDummyList), Single(Single) {}
1212 
1213  class iterator;
1214 
1215  using IteratorBase =
1216  llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1217  std::random_access_iterator_tag,
1218  NamedDecl *const>;
1219 
1220  class iterator : public IteratorBase {
1221  value_type SingleElement;
1222 
1223  public:
1224  explicit iterator(pointer Pos, value_type Single = nullptr)
1225  : IteratorBase(Pos), SingleElement(Single) {}
1226 
1228  return SingleElement ? SingleElement : IteratorBase::operator*();
1229  }
1230  };
1231 
1232  using const_iterator = iterator;
1233  using pointer = iterator::pointer;
1234  using reference = iterator::reference;
1235 
1236  iterator begin() const { return iterator(Result.begin(), Single); }
1237  iterator end() const { return iterator(Result.end(), Single); }
1238 
1239  bool empty() const { return Result.empty(); }
1240  pointer data() const { return Single ? &Single : Result.data(); }
1241  size_t size() const { return Single ? 1 : Result.size(); }
1242  reference front() const { return Single ? Single : Result.front(); }
1243  reference back() const { return Single ? Single : Result.back(); }
1244  reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1245 
1246  // FIXME: Remove this from the interface
1247  DeclContextLookupResult slice(size_t N) const {
1248  DeclContextLookupResult Sliced = Result.slice(N);
1249  Sliced.Single = Single;
1250  return Sliced;
1251  }
1252 };
1253 
1254 /// DeclContext - This is used only as base class of specific decl types that
1255 /// can act as declaration contexts. These decls are (only the top classes
1256 /// that directly derive from DeclContext are mentioned, not their subclasses):
1257 ///
1258 /// TranslationUnitDecl
1259 /// ExternCContext
1260 /// NamespaceDecl
1261 /// TagDecl
1262 /// OMPDeclareReductionDecl
1263 /// OMPDeclareMapperDecl
1264 /// FunctionDecl
1265 /// ObjCMethodDecl
1266 /// ObjCContainerDecl
1267 /// LinkageSpecDecl
1268 /// ExportDecl
1269 /// BlockDecl
1270 /// CapturedDecl
1272  /// For makeDeclVisibleInContextImpl
1273  friend class ASTDeclReader;
1274  /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap,
1275  /// hasNeedToReconcileExternalVisibleStorage
1276  friend class ExternalASTSource;
1277  /// For CreateStoredDeclsMap
1278  friend class DependentDiagnostic;
1279  /// For hasNeedToReconcileExternalVisibleStorage,
1280  /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups
1281  friend class ASTWriter;
1282 
1283  // We use uint64_t in the bit-fields below since some bit-fields
1284  // cross the unsigned boundary and this breaks the packing.
1285 
1286  /// Stores the bits used by DeclContext.
1287  /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor
1288  /// methods in DeclContext should be updated appropriately.
1289  class DeclContextBitfields {
1290  friend class DeclContext;
1291  /// DeclKind - This indicates which class this is.
1292  uint64_t DeclKind : 7;
1293 
1294  /// Whether this declaration context also has some external
1295  /// storage that contains additional declarations that are lexically
1296  /// part of this context.
1297  mutable uint64_t ExternalLexicalStorage : 1;
1298 
1299  /// Whether this declaration context also has some external
1300  /// storage that contains additional declarations that are visible
1301  /// in this context.
1302  mutable uint64_t ExternalVisibleStorage : 1;
1303 
1304  /// Whether this declaration context has had externally visible
1305  /// storage added since the last lookup. In this case, \c LookupPtr's
1306  /// invariant may not hold and needs to be fixed before we perform
1307  /// another lookup.
1308  mutable uint64_t NeedToReconcileExternalVisibleStorage : 1;
1309 
1310  /// If \c true, this context may have local lexical declarations
1311  /// that are missing from the lookup table.
1312  mutable uint64_t HasLazyLocalLexicalLookups : 1;
1313 
1314  /// If \c true, the external source may have lexical declarations
1315  /// that are missing from the lookup table.
1316  mutable uint64_t HasLazyExternalLexicalLookups : 1;
1317 
1318  /// If \c true, lookups should only return identifier from
1319  /// DeclContext scope (for example TranslationUnit). Used in
1320  /// LookupQualifiedName()
1321  mutable uint64_t UseQualifiedLookup : 1;
1322  };
1323 
1324  /// Number of bits in DeclContextBitfields.
1325  enum { NumDeclContextBits = 13 };
1326 
1327  /// Stores the bits used by TagDecl.
1328  /// If modified NumTagDeclBits and the accessor
1329  /// methods in TagDecl should be updated appropriately.
1330  class TagDeclBitfields {
1331  friend class TagDecl;
1332  /// For the bits in DeclContextBitfields
1333  uint64_t : NumDeclContextBits;
1334 
1335  /// The TagKind enum.
1336  uint64_t TagDeclKind : 3;
1337 
1338  /// True if this is a definition ("struct foo {};"), false if it is a
1339  /// declaration ("struct foo;"). It is not considered a definition
1340  /// until the definition has been fully processed.
1341  uint64_t IsCompleteDefinition : 1;
1342 
1343  /// True if this is currently being defined.
1344  uint64_t IsBeingDefined : 1;
1345 
1346  /// True if this tag declaration is "embedded" (i.e., defined or declared
1347  /// for the very first time) in the syntax of a declarator.
1348  uint64_t IsEmbeddedInDeclarator : 1;
1349 
1350  /// True if this tag is free standing, e.g. "struct foo;".
1351  uint64_t IsFreeStanding : 1;
1352 
1353  /// Indicates whether it is possible for declarations of this kind
1354  /// to have an out-of-date definition.
1355  ///
1356  /// This option is only enabled when modules are enabled.
1357  uint64_t MayHaveOutOfDateDef : 1;
1358 
1359  /// Has the full definition of this type been required by a use somewhere in
1360  /// the TU.
1361  uint64_t IsCompleteDefinitionRequired : 1;
1362  };
1363 
1364  /// Number of non-inherited bits in TagDeclBitfields.
1365  enum { NumTagDeclBits = 9 };
1366 
1367  /// Stores the bits used by EnumDecl.
1368  /// If modified NumEnumDeclBit and the accessor
1369  /// methods in EnumDecl should be updated appropriately.
1370  class EnumDeclBitfields {
1371  friend class EnumDecl;
1372  /// For the bits in DeclContextBitfields.
1373  uint64_t : NumDeclContextBits;
1374  /// For the bits in TagDeclBitfields.
1375  uint64_t : NumTagDeclBits;
1376 
1377  /// Width in bits required to store all the non-negative
1378  /// enumerators of this enum.
1379  uint64_t NumPositiveBits : 8;
1380 
1381  /// Width in bits required to store all the negative
1382  /// enumerators of this enum.
1383  uint64_t NumNegativeBits : 8;
1384 
1385  /// True if this tag declaration is a scoped enumeration. Only
1386  /// possible in C++11 mode.
1387  uint64_t IsScoped : 1;
1388 
1389  /// If this tag declaration is a scoped enum,
1390  /// then this is true if the scoped enum was declared using the class
1391  /// tag, false if it was declared with the struct tag. No meaning is
1392  /// associated if this tag declaration is not a scoped enum.
1393  uint64_t IsScopedUsingClassTag : 1;
1394 
1395  /// True if this is an enumeration with fixed underlying type. Only
1396  /// possible in C++11, Microsoft extensions, or Objective C mode.
1397  uint64_t IsFixed : 1;
1398 
1399  /// True if a valid hash is stored in ODRHash.
1400  uint64_t HasODRHash : 1;
1401  };
1402 
1403  /// Number of non-inherited bits in EnumDeclBitfields.
1404  enum { NumEnumDeclBits = 20 };
1405 
1406  /// Stores the bits used by RecordDecl.
1407  /// If modified NumRecordDeclBits and the accessor
1408  /// methods in RecordDecl should be updated appropriately.
1409  class RecordDeclBitfields {
1410  friend class RecordDecl;
1411  /// For the bits in DeclContextBitfields.
1412  uint64_t : NumDeclContextBits;
1413  /// For the bits in TagDeclBitfields.
1414  uint64_t : NumTagDeclBits;
1415 
1416  /// This is true if this struct ends with a flexible
1417  /// array member (e.g. int X[]) or if this union contains a struct that does.
1418  /// If so, this cannot be contained in arrays or other structs as a member.
1419  uint64_t HasFlexibleArrayMember : 1;
1420 
1421  /// Whether this is the type of an anonymous struct or union.
1422  uint64_t AnonymousStructOrUnion : 1;
1423 
1424  /// This is true if this struct has at least one member
1425  /// containing an Objective-C object pointer type.
1426  uint64_t HasObjectMember : 1;
1427 
1428  /// This is true if struct has at least one member of
1429  /// 'volatile' type.
1430  uint64_t HasVolatileMember : 1;
1431 
1432  /// Whether the field declarations of this record have been loaded
1433  /// from external storage. To avoid unnecessary deserialization of
1434  /// methods/nested types we allow deserialization of just the fields
1435  /// when needed.
1436  mutable uint64_t LoadedFieldsFromExternalStorage : 1;
1437 
1438  /// Basic properties of non-trivial C structs.
1439  uint64_t NonTrivialToPrimitiveDefaultInitialize : 1;
1440  uint64_t NonTrivialToPrimitiveCopy : 1;
1441  uint64_t NonTrivialToPrimitiveDestroy : 1;
1442 
1443  /// The following bits indicate whether this is or contains a C union that
1444  /// is non-trivial to default-initialize, destruct, or copy. These bits
1445  /// imply the associated basic non-triviality predicates declared above.
1446  uint64_t HasNonTrivialToPrimitiveDefaultInitializeCUnion : 1;
1447  uint64_t HasNonTrivialToPrimitiveDestructCUnion : 1;
1448  uint64_t HasNonTrivialToPrimitiveCopyCUnion : 1;
1449 
1450  /// Indicates whether this struct is destroyed in the callee.
1451  uint64_t ParamDestroyedInCallee : 1;
1452 
1453  /// Represents the way this type is passed to a function.
1454  uint64_t ArgPassingRestrictions : 2;
1455  };
1456 
1457  /// Number of non-inherited bits in RecordDeclBitfields.
1458  enum { NumRecordDeclBits = 14 };
1459 
1460  /// Stores the bits used by OMPDeclareReductionDecl.
1461  /// If modified NumOMPDeclareReductionDeclBits and the accessor
1462  /// methods in OMPDeclareReductionDecl should be updated appropriately.
1463  class OMPDeclareReductionDeclBitfields {
1464  friend class OMPDeclareReductionDecl;
1465  /// For the bits in DeclContextBitfields
1466  uint64_t : NumDeclContextBits;
1467 
1468  /// Kind of initializer,
1469  /// function call or omp_priv<init_expr> initializtion.
1470  uint64_t InitializerKind : 2;
1471  };
1472 
1473  /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields.
1474  enum { NumOMPDeclareReductionDeclBits = 2 };
1475 
1476  /// Stores the bits used by FunctionDecl.
1477  /// If modified NumFunctionDeclBits and the accessor
1478  /// methods in FunctionDecl and CXXDeductionGuideDecl
1479  /// (for IsCopyDeductionCandidate) should be updated appropriately.
1480  class FunctionDeclBitfields {
1481  friend class FunctionDecl;
1482  /// For IsCopyDeductionCandidate
1483  friend class CXXDeductionGuideDecl;
1484  /// For the bits in DeclContextBitfields.
1485  uint64_t : NumDeclContextBits;
1486 
1487  uint64_t SClass : 3;
1488  uint64_t IsInline : 1;
1489  uint64_t IsInlineSpecified : 1;
1490 
1491  uint64_t IsVirtualAsWritten : 1;
1492  uint64_t IsPure : 1;
1493  uint64_t HasInheritedPrototype : 1;
1494  uint64_t HasWrittenPrototype : 1;
1495  uint64_t IsDeleted : 1;
1496  /// Used by CXXMethodDecl
1497  uint64_t IsTrivial : 1;
1498 
1499  /// This flag indicates whether this function is trivial for the purpose of
1500  /// calls. This is meaningful only when this function is a copy/move
1501  /// constructor or a destructor.
1502  uint64_t IsTrivialForCall : 1;
1503 
1504  uint64_t IsDefaulted : 1;
1505  uint64_t IsExplicitlyDefaulted : 1;
1506  uint64_t HasDefaultedFunctionInfo : 1;
1507  uint64_t HasImplicitReturnZero : 1;
1508  uint64_t IsLateTemplateParsed : 1;
1509 
1510  /// Kind of contexpr specifier as defined by ConstexprSpecKind.
1511  uint64_t ConstexprKind : 2;
1512  uint64_t InstantiationIsPending : 1;
1513 
1514  /// Indicates if the function uses __try.
1515  uint64_t UsesSEHTry : 1;
1516 
1517  /// Indicates if the function was a definition
1518  /// but its body was skipped.
1519  uint64_t HasSkippedBody : 1;
1520 
1521  /// Indicates if the function declaration will
1522  /// have a body, once we're done parsing it.
1523  uint64_t WillHaveBody : 1;
1524 
1525  /// Indicates that this function is a multiversioned
1526  /// function using attribute 'target'.
1527  uint64_t IsMultiVersion : 1;
1528 
1529  /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that
1530  /// the Deduction Guide is the implicitly generated 'copy
1531  /// deduction candidate' (is used during overload resolution).
1532  uint64_t IsCopyDeductionCandidate : 1;
1533 
1534  /// Store the ODRHash after first calculation.
1535  uint64_t HasODRHash : 1;
1536 
1537  /// Indicates if the function uses Floating Point Constrained Intrinsics
1538  uint64_t UsesFPIntrin : 1;
1539  };
1540 
1541  /// Number of non-inherited bits in FunctionDeclBitfields.
1542  enum { NumFunctionDeclBits = 27 };
1543 
1544  /// Stores the bits used by CXXConstructorDecl. If modified
1545  /// NumCXXConstructorDeclBits and the accessor
1546  /// methods in CXXConstructorDecl should be updated appropriately.
1547  class CXXConstructorDeclBitfields {
1548  friend class CXXConstructorDecl;
1549  /// For the bits in DeclContextBitfields.
1550  uint64_t : NumDeclContextBits;
1551  /// For the bits in FunctionDeclBitfields.
1552  uint64_t : NumFunctionDeclBits;
1553 
1554  /// 24 bits to fit in the remaining available space.
1555  /// Note that this makes CXXConstructorDeclBitfields take
1556  /// exactly 64 bits and thus the width of NumCtorInitializers
1557  /// will need to be shrunk if some bit is added to NumDeclContextBitfields,
1558  /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields.
1559  uint64_t NumCtorInitializers : 21;
1560  uint64_t IsInheritingConstructor : 1;
1561 
1562  /// Whether this constructor has a trail-allocated explicit specifier.
1563  uint64_t HasTrailingExplicitSpecifier : 1;
1564  /// If this constructor does't have a trail-allocated explicit specifier.
1565  /// Whether this constructor is explicit specified.
1566  uint64_t IsSimpleExplicit : 1;
1567  };
1568 
1569  /// Number of non-inherited bits in CXXConstructorDeclBitfields.
1570  enum {
1571  NumCXXConstructorDeclBits = 64 - NumDeclContextBits - NumFunctionDeclBits
1572  };
1573 
1574  /// Stores the bits used by ObjCMethodDecl.
1575  /// If modified NumObjCMethodDeclBits and the accessor
1576  /// methods in ObjCMethodDecl should be updated appropriately.
1577  class ObjCMethodDeclBitfields {
1578  friend class ObjCMethodDecl;
1579 
1580  /// For the bits in DeclContextBitfields.
1581  uint64_t : NumDeclContextBits;
1582 
1583  /// The conventional meaning of this method; an ObjCMethodFamily.
1584  /// This is not serialized; instead, it is computed on demand and
1585  /// cached.
1586  mutable uint64_t Family : ObjCMethodFamilyBitWidth;
1587 
1588  /// instance (true) or class (false) method.
1589  uint64_t IsInstance : 1;
1590  uint64_t IsVariadic : 1;
1591 
1592  /// True if this method is the getter or setter for an explicit property.
1593  uint64_t IsPropertyAccessor : 1;
1594 
1595  /// True if this method is a synthesized property accessor stub.
1596  uint64_t IsSynthesizedAccessorStub : 1;
1597 
1598  /// Method has a definition.
1599  uint64_t IsDefined : 1;
1600 
1601  /// Method redeclaration in the same interface.
1602  uint64_t IsRedeclaration : 1;
1603 
1604  /// Is redeclared in the same interface.
1605  mutable uint64_t HasRedeclaration : 1;
1606 
1607  /// \@required/\@optional
1608  uint64_t DeclImplementation : 2;
1609 
1610  /// in, inout, etc.
1611  uint64_t objcDeclQualifier : 7;
1612 
1613  /// Indicates whether this method has a related result type.
1614  uint64_t RelatedResultType : 1;
1615 
1616  /// Whether the locations of the selector identifiers are in a
1617  /// "standard" position, a enum SelectorLocationsKind.
1618  uint64_t SelLocsKind : 2;
1619 
1620  /// Whether this method overrides any other in the class hierarchy.
1621  ///
1622  /// A method is said to override any method in the class's
1623  /// base classes, its protocols, or its categories' protocols, that has
1624  /// the same selector and is of the same kind (class or instance).
1625  /// A method in an implementation is not considered as overriding the same
1626  /// method in the interface or its categories.
1627  uint64_t IsOverriding : 1;
1628 
1629  /// Indicates if the method was a definition but its body was skipped.
1630  uint64_t HasSkippedBody : 1;
1631  };
1632 
1633  /// Number of non-inherited bits in ObjCMethodDeclBitfields.
1634  enum { NumObjCMethodDeclBits = 24 };
1635 
1636  /// Stores the bits used by ObjCContainerDecl.
1637  /// If modified NumObjCContainerDeclBits and the accessor
1638  /// methods in ObjCContainerDecl should be updated appropriately.
1639  class ObjCContainerDeclBitfields {
1640  friend class ObjCContainerDecl;
1641  /// For the bits in DeclContextBitfields
1642  uint32_t : NumDeclContextBits;
1643 
1644  // Not a bitfield but this saves space.
1645  // Note that ObjCContainerDeclBitfields is full.
1646  SourceLocation AtStart;
1647  };
1648 
1649  /// Number of non-inherited bits in ObjCContainerDeclBitfields.
1650  /// Note that here we rely on the fact that SourceLocation is 32 bits
1651  /// wide. We check this with the static_assert in the ctor of DeclContext.
1652  enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits };
1653 
1654  /// Stores the bits used by LinkageSpecDecl.
1655  /// If modified NumLinkageSpecDeclBits and the accessor
1656  /// methods in LinkageSpecDecl should be updated appropriately.
1657  class LinkageSpecDeclBitfields {
1658  friend class LinkageSpecDecl;
1659  /// For the bits in DeclContextBitfields.
1660  uint64_t : NumDeclContextBits;
1661 
1662  /// The language for this linkage specification with values
1663  /// in the enum LinkageSpecDecl::LanguageIDs.
1664  uint64_t Language : 3;
1665 
1666  /// True if this linkage spec has braces.
1667  /// This is needed so that hasBraces() returns the correct result while the
1668  /// linkage spec body is being parsed. Once RBraceLoc has been set this is
1669  /// not used, so it doesn't need to be serialized.
1670  uint64_t HasBraces : 1;
1671  };
1672 
1673  /// Number of non-inherited bits in LinkageSpecDeclBitfields.
1674  enum { NumLinkageSpecDeclBits = 4 };
1675 
1676  /// Stores the bits used by BlockDecl.
1677  /// If modified NumBlockDeclBits and the accessor
1678  /// methods in BlockDecl should be updated appropriately.
1679  class BlockDeclBitfields {
1680  friend class BlockDecl;
1681  /// For the bits in DeclContextBitfields.
1682  uint64_t : NumDeclContextBits;
1683 
1684  uint64_t IsVariadic : 1;
1685  uint64_t CapturesCXXThis : 1;
1686  uint64_t BlockMissingReturnType : 1;
1687  uint64_t IsConversionFromLambda : 1;
1688 
1689  /// A bit that indicates this block is passed directly to a function as a
1690  /// non-escaping parameter.
1691  uint64_t DoesNotEscape : 1;
1692 
1693  /// A bit that indicates whether it's possible to avoid coying this block to
1694  /// the heap when it initializes or is assigned to a local variable with
1695  /// automatic storage.
1696  uint64_t CanAvoidCopyToHeap : 1;
1697  };
1698 
1699  /// Number of non-inherited bits in BlockDeclBitfields.
1700  enum { NumBlockDeclBits = 5 };
1701 
1702  /// Pointer to the data structure used to lookup declarations
1703  /// within this context (or a DependentStoredDeclsMap if this is a
1704  /// dependent context). We maintain the invariant that, if the map
1705  /// contains an entry for a DeclarationName (and we haven't lazily
1706  /// omitted anything), then it contains all relevant entries for that
1707  /// name (modulo the hasExternalDecls() flag).
1708  mutable StoredDeclsMap *LookupPtr = nullptr;
1709 
1710 protected:
1711  /// This anonymous union stores the bits belonging to DeclContext and classes
1712  /// deriving from it. The goal is to use otherwise wasted
1713  /// space in DeclContext to store data belonging to derived classes.
1714  /// The space saved is especially significient when pointers are aligned
1715  /// to 8 bytes. In this case due to alignment requirements we have a
1716  /// little less than 8 bytes free in DeclContext which we can use.
1717  /// We check that none of the classes in this union is larger than
1718  /// 8 bytes with static_asserts in the ctor of DeclContext.
1719  union {
1720  DeclContextBitfields DeclContextBits;
1721  TagDeclBitfields TagDeclBits;
1722  EnumDeclBitfields EnumDeclBits;
1723  RecordDeclBitfields RecordDeclBits;
1724  OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits;
1725  FunctionDeclBitfields FunctionDeclBits;
1726  CXXConstructorDeclBitfields CXXConstructorDeclBits;
1727  ObjCMethodDeclBitfields ObjCMethodDeclBits;
1728  ObjCContainerDeclBitfields ObjCContainerDeclBits;
1729  LinkageSpecDeclBitfields LinkageSpecDeclBits;
1730  BlockDeclBitfields BlockDeclBits;
1731 
1732  static_assert(sizeof(DeclContextBitfields) <= 8,
1733  "DeclContextBitfields is larger than 8 bytes!");
1734  static_assert(sizeof(TagDeclBitfields) <= 8,
1735  "TagDeclBitfields is larger than 8 bytes!");
1736  static_assert(sizeof(EnumDeclBitfields) <= 8,
1737  "EnumDeclBitfields is larger than 8 bytes!");
1738  static_assert(sizeof(RecordDeclBitfields) <= 8,
1739  "RecordDeclBitfields is larger than 8 bytes!");
1740  static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8,
1741  "OMPDeclareReductionDeclBitfields is larger than 8 bytes!");
1742  static_assert(sizeof(FunctionDeclBitfields) <= 8,
1743  "FunctionDeclBitfields is larger than 8 bytes!");
1744  static_assert(sizeof(CXXConstructorDeclBitfields) <= 8,
1745  "CXXConstructorDeclBitfields is larger than 8 bytes!");
1746  static_assert(sizeof(ObjCMethodDeclBitfields) <= 8,
1747  "ObjCMethodDeclBitfields is larger than 8 bytes!");
1748  static_assert(sizeof(ObjCContainerDeclBitfields) <= 8,
1749  "ObjCContainerDeclBitfields is larger than 8 bytes!");
1750  static_assert(sizeof(LinkageSpecDeclBitfields) <= 8,
1751  "LinkageSpecDeclBitfields is larger than 8 bytes!");
1752  static_assert(sizeof(BlockDeclBitfields) <= 8,
1753  "BlockDeclBitfields is larger than 8 bytes!");
1754  };
1755 
1756  /// FirstDecl - The first declaration stored within this declaration
1757  /// context.
1758  mutable Decl *FirstDecl = nullptr;
1759 
1760  /// LastDecl - The last declaration stored within this declaration
1761  /// context. FIXME: We could probably cache this value somewhere
1762  /// outside of the DeclContext, to reduce the size of DeclContext by
1763  /// another pointer.
1764  mutable Decl *LastDecl = nullptr;
1765 
1766  /// Build up a chain of declarations.
1767  ///
1768  /// \returns the first/last pair of declarations.
1769  static std::pair<Decl *, Decl *>
1770  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1771 
1773 
1774 public:
1775  ~DeclContext();
1776 
1778  return static_cast<Decl::Kind>(DeclContextBits.DeclKind);
1779  }
1780 
1781  const char *getDeclKindName() const;
1782 
1783  /// getParent - Returns the containing DeclContext.
1785  return cast<Decl>(this)->getDeclContext();
1786  }
1787  const DeclContext *getParent() const {
1788  return const_cast<DeclContext*>(this)->getParent();
1789  }
1790 
1791  /// getLexicalParent - Returns the containing lexical DeclContext. May be
1792  /// different from getParent, e.g.:
1793  ///
1794  /// namespace A {
1795  /// struct S;
1796  /// }
1797  /// struct A::S {}; // getParent() == namespace 'A'
1798  /// // getLexicalParent() == translation unit
1799  ///
1801  return cast<Decl>(this)->getLexicalDeclContext();
1802  }
1804  return const_cast<DeclContext*>(this)->getLexicalParent();
1805  }
1806 
1807  DeclContext *getLookupParent();
1808 
1809  const DeclContext *getLookupParent() const {
1810  return const_cast<DeclContext*>(this)->getLookupParent();
1811  }
1812 
1814  return cast<Decl>(this)->getASTContext();
1815  }
1816 
1817  bool isClosure() const { return getDeclKind() == Decl::Block; }
1818 
1819  /// Return this DeclContext if it is a BlockDecl. Otherwise, return the
1820  /// innermost enclosing BlockDecl or null if there are no enclosing blocks.
1821  const BlockDecl *getInnermostBlockDecl() const;
1822 
1823  bool isObjCContainer() const {
1824  switch (getDeclKind()) {
1825  case Decl::ObjCCategory:
1826  case Decl::ObjCCategoryImpl:
1827  case Decl::ObjCImplementation:
1828  case Decl::ObjCInterface:
1829  case Decl::ObjCProtocol:
1830  return true;
1831  default:
1832  return false;
1833  }
1834  }
1835 
1836  bool isFunctionOrMethod() const {
1837  switch (getDeclKind()) {
1838  case Decl::Block:
1839  case Decl::Captured:
1840  case Decl::ObjCMethod:
1841  return true;
1842  default:
1843  return getDeclKind() >= Decl::firstFunction &&
1844  getDeclKind() <= Decl::lastFunction;
1845  }
1846  }
1847 
1848  /// Test whether the context supports looking up names.
1849  bool isLookupContext() const {
1850  return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec &&
1851  getDeclKind() != Decl::Export;
1852  }
1853 
1854  bool isFileContext() const {
1855  return getDeclKind() == Decl::TranslationUnit ||
1856  getDeclKind() == Decl::Namespace;
1857  }
1858 
1859  bool isTranslationUnit() const {
1860  return getDeclKind() == Decl::TranslationUnit;
1861  }
1862 
1863  bool isRecord() const {
1864  return getDeclKind() >= Decl::firstRecord &&
1865  getDeclKind() <= Decl::lastRecord;
1866  }
1867 
1868  bool isNamespace() const { return getDeclKind() == Decl::Namespace; }
1869 
1870  bool isStdNamespace() const;
1871 
1872  bool isInlineNamespace() const;
1873 
1874  /// Determines whether this context is dependent on a
1875  /// template parameter.
1876  bool isDependentContext() const;
1877 
1878  /// isTransparentContext - Determines whether this context is a
1879  /// "transparent" context, meaning that the members declared in this
1880  /// context are semantically declared in the nearest enclosing
1881  /// non-transparent (opaque) context but are lexically declared in
1882  /// this context. For example, consider the enumerators of an
1883  /// enumeration type:
1884  /// @code
1885  /// enum E {
1886  /// Val1
1887  /// };
1888  /// @endcode
1889  /// Here, E is a transparent context, so its enumerator (Val1) will
1890  /// appear (semantically) that it is in the same context of E.
1891  /// Examples of transparent contexts include: enumerations (except for
1892  /// C++0x scoped enums), and C++ linkage specifications.
1893  bool isTransparentContext() const;
1894 
1895  /// Determines whether this context or some of its ancestors is a
1896  /// linkage specification context that specifies C linkage.
1897  bool isExternCContext() const;
1898 
1899  /// Retrieve the nearest enclosing C linkage specification context.
1900  const LinkageSpecDecl *getExternCContext() const;
1901 
1902  /// Determines whether this context or some of its ancestors is a
1903  /// linkage specification context that specifies C++ linkage.
1904  bool isExternCXXContext() const;
1905 
1906  /// Determine whether this declaration context is equivalent
1907  /// to the declaration context DC.
1908  bool Equals(const DeclContext *DC) const {
1909  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1910  }
1911 
1912  /// Determine whether this declaration context encloses the
1913  /// declaration context DC.
1914  bool Encloses(const DeclContext *DC) const;
1915 
1916  /// Find the nearest non-closure ancestor of this context,
1917  /// i.e. the innermost semantic parent of this context which is not
1918  /// a closure. A context may be its own non-closure ancestor.
1919  Decl *getNonClosureAncestor();
1920  const Decl *getNonClosureAncestor() const {
1921  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1922  }
1923 
1924  /// getPrimaryContext - There may be many different
1925  /// declarations of the same entity (including forward declarations
1926  /// of classes, multiple definitions of namespaces, etc.), each with
1927  /// a different set of declarations. This routine returns the
1928  /// "primary" DeclContext structure, which will contain the
1929  /// information needed to perform name lookup into this context.
1930  DeclContext *getPrimaryContext();
1932  return const_cast<DeclContext*>(this)->getPrimaryContext();
1933  }
1934 
1935  /// getRedeclContext - Retrieve the context in which an entity conflicts with
1936  /// other entities of the same name, or where it is a redeclaration if the
1937  /// two entities are compatible. This skips through transparent contexts.
1938  DeclContext *getRedeclContext();
1940  return const_cast<DeclContext *>(this)->getRedeclContext();
1941  }
1942 
1943  /// Retrieve the nearest enclosing namespace context.
1944  DeclContext *getEnclosingNamespaceContext();
1946  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1947  }
1948 
1949  /// Retrieve the outermost lexically enclosing record context.
1950  RecordDecl *getOuterLexicalRecordContext();
1952  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1953  }
1954 
1955  /// Test if this context is part of the enclosing namespace set of
1956  /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1957  /// isn't a namespace, this is equivalent to Equals().
1958  ///
1959  /// The enclosing namespace set of a namespace is the namespace and, if it is
1960  /// inline, its enclosing namespace, recursively.
1961  bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1962 
1963  /// Collects all of the declaration contexts that are semantically
1964  /// connected to this declaration context.
1965  ///
1966  /// For declaration contexts that have multiple semantically connected but
1967  /// syntactically distinct contexts, such as C++ namespaces, this routine
1968  /// retrieves the complete set of such declaration contexts in source order.
1969  /// For example, given:
1970  ///
1971  /// \code
1972  /// namespace N {
1973  /// int x;
1974  /// }
1975  /// namespace N {
1976  /// int y;
1977  /// }
1978  /// \endcode
1979  ///
1980  /// The \c Contexts parameter will contain both definitions of N.
1981  ///
1982  /// \param Contexts Will be cleared and set to the set of declaration
1983  /// contexts that are semanticaly connected to this declaration context,
1984  /// in source order, including this context (which may be the only result,
1985  /// for non-namespace contexts).
1986  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1987 
1988  /// decl_iterator - Iterates through the declarations stored
1989  /// within this context.
1991  /// Current - The current declaration.
1992  Decl *Current = nullptr;
1993 
1994  public:
1995  using value_type = Decl *;
1996  using reference = const value_type &;
1997  using pointer = const value_type *;
1998  using iterator_category = std::forward_iterator_tag;
2000 
2001  decl_iterator() = default;
2002  explicit decl_iterator(Decl *C) : Current(C) {}
2003 
2004  reference operator*() const { return Current; }
2005 
2006  // This doesn't meet the iterator requirements, but it's convenient
2007  value_type operator->() const { return Current; }
2008 
2010  Current = Current->getNextDeclInContext();
2011  return *this;
2012  }
2013 
2015  decl_iterator tmp(*this);
2016  ++(*this);
2017  return tmp;
2018  }
2019 
2021  return x.Current == y.Current;
2022  }
2023 
2025  return x.Current != y.Current;
2026  }
2027  };
2028 
2029  using decl_range = llvm::iterator_range<decl_iterator>;
2030 
2031  /// decls_begin/decls_end - Iterate over the declarations stored in
2032  /// this context.
2033  decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
2034  decl_iterator decls_begin() const;
2035  decl_iterator decls_end() const { return decl_iterator(); }
2036  bool decls_empty() const;
2037 
2038  /// noload_decls_begin/end - Iterate over the declarations stored in this
2039  /// context that are currently loaded; don't attempt to retrieve anything
2040  /// from an external source.
2042  return decl_range(noload_decls_begin(), noload_decls_end());
2043  }
2044  decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
2046 
2047  /// specific_decl_iterator - Iterates over a subrange of
2048  /// declarations stored in a DeclContext, providing only those that
2049  /// are of type SpecificDecl (or a class derived from it). This
2050  /// iterator is used, for example, to provide iteration over just
2051  /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
2052  template<typename SpecificDecl>
2054  /// Current - The current, underlying declaration iterator, which
2055  /// will either be NULL or will point to a declaration of
2056  /// type SpecificDecl.
2058 
2059  /// SkipToNextDecl - Advances the current position up to the next
2060  /// declaration of type SpecificDecl that also meets the criteria
2061  /// required by Acceptable.
2062  void SkipToNextDecl() {
2063  while (*Current && !isa<SpecificDecl>(*Current))
2064  ++Current;
2065  }
2066 
2067  public:
2068  using value_type = SpecificDecl *;
2069  // TODO: Add reference and pointer types (with some appropriate proxy type)
2070  // if we ever have a need for them.
2071  using reference = void;
2072  using pointer = void;
2073  using difference_type =
2074  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2075  using iterator_category = std::forward_iterator_tag;
2076 
2077  specific_decl_iterator() = default;
2078 
2079  /// specific_decl_iterator - Construct a new iterator over a
2080  /// subset of the declarations the range [C,
2081  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2082  /// member function of SpecificDecl that should return true for
2083  /// all of the SpecificDecl instances that will be in the subset
2084  /// of iterators. For example, if you want Objective-C instance
2085  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2086  /// &ObjCMethodDecl::isInstanceMethod.
2088  SkipToNextDecl();
2089  }
2090 
2091  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2092 
2093  // This doesn't meet the iterator requirements, but it's convenient
2094  value_type operator->() const { return **this; }
2095 
2097  ++Current;
2098  SkipToNextDecl();
2099  return *this;
2100  }
2101 
2103  specific_decl_iterator tmp(*this);
2104  ++(*this);
2105  return tmp;
2106  }
2107 
2108  friend bool operator==(const specific_decl_iterator& x,
2109  const specific_decl_iterator& y) {
2110  return x.Current == y.Current;
2111  }
2112 
2113  friend bool operator!=(const specific_decl_iterator& x,
2114  const specific_decl_iterator& y) {
2115  return x.Current != y.Current;
2116  }
2117  };
2118 
2119  /// Iterates over a filtered subrange of declarations stored
2120  /// in a DeclContext.
2121  ///
2122  /// This iterator visits only those declarations that are of type
2123  /// SpecificDecl (or a class derived from it) and that meet some
2124  /// additional run-time criteria. This iterator is used, for
2125  /// example, to provide access to the instance methods within an
2126  /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
2127  /// Acceptable = ObjCMethodDecl::isInstanceMethod).
2128  template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
2130  /// Current - The current, underlying declaration iterator, which
2131  /// will either be NULL or will point to a declaration of
2132  /// type SpecificDecl.
2134 
2135  /// SkipToNextDecl - Advances the current position up to the next
2136  /// declaration of type SpecificDecl that also meets the criteria
2137  /// required by Acceptable.
2138  void SkipToNextDecl() {
2139  while (*Current &&
2140  (!isa<SpecificDecl>(*Current) ||
2141  (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
2142  ++Current;
2143  }
2144 
2145  public:
2146  using value_type = SpecificDecl *;
2147  // TODO: Add reference and pointer types (with some appropriate proxy type)
2148  // if we ever have a need for them.
2149  using reference = void;
2150  using pointer = void;
2151  using difference_type =
2152  std::iterator_traits<DeclContext::decl_iterator>::difference_type;
2153  using iterator_category = std::forward_iterator_tag;
2154 
2155  filtered_decl_iterator() = default;
2156 
2157  /// filtered_decl_iterator - Construct a new iterator over a
2158  /// subset of the declarations the range [C,
2159  /// end-of-declarations). If A is non-NULL, it is a pointer to a
2160  /// member function of SpecificDecl that should return true for
2161  /// all of the SpecificDecl instances that will be in the subset
2162  /// of iterators. For example, if you want Objective-C instance
2163  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
2164  /// &ObjCMethodDecl::isInstanceMethod.
2166  SkipToNextDecl();
2167  }
2168 
2169  value_type operator*() const { return cast<SpecificDecl>(*Current); }
2170  value_type operator->() const { return cast<SpecificDecl>(*Current); }
2171 
2173  ++Current;
2174  SkipToNextDecl();
2175  return *this;
2176  }
2177 
2179  filtered_decl_iterator tmp(*this);
2180  ++(*this);
2181  return tmp;
2182  }
2183 
2184  friend bool operator==(const filtered_decl_iterator& x,
2185  const filtered_decl_iterator& y) {
2186  return x.Current == y.Current;
2187  }
2188 
2189  friend bool operator!=(const filtered_decl_iterator& x,
2190  const filtered_decl_iterator& y) {
2191  return x.Current != y.Current;
2192  }
2193  };
2194 
2195  /// Add the declaration D into this context.
2196  ///
2197  /// This routine should be invoked when the declaration D has first
2198  /// been declared, to place D into the context where it was
2199  /// (lexically) defined. Every declaration must be added to one
2200  /// (and only one!) context, where it can be visited via
2201  /// [decls_begin(), decls_end()). Once a declaration has been added
2202  /// to its lexical context, the corresponding DeclContext owns the
2203  /// declaration.
2204  ///
2205  /// If D is also a NamedDecl, it will be made visible within its
2206  /// semantic context via makeDeclVisibleInContext.
2207  void addDecl(Decl *D);
2208 
2209  /// Add the declaration D into this context, but suppress
2210  /// searches for external declarations with the same name.
2211  ///
2212  /// Although analogous in function to addDecl, this removes an
2213  /// important check. This is only useful if the Decl is being
2214  /// added in response to an external search; in all other cases,
2215  /// addDecl() is the right function to use.
2216  /// See the ASTImporter for use cases.
2217  void addDeclInternal(Decl *D);
2218 
2219  /// Add the declaration D to this context without modifying
2220  /// any lookup tables.
2221  ///
2222  /// This is useful for some operations in dependent contexts where
2223  /// the semantic context might not be dependent; this basically
2224  /// only happens with friends.
2225  void addHiddenDecl(Decl *D);
2226 
2227  /// Removes a declaration from this context.
2228  void removeDecl(Decl *D);
2229 
2230  /// Checks whether a declaration is in this context.
2231  bool containsDecl(Decl *D) const;
2232 
2233  /// Checks whether a declaration is in this context.
2234  /// This also loads the Decls from the external source before the check.
2235  bool containsDeclAndLoad(Decl *D) const;
2236 
2239 
2240  /// lookup - Find the declarations (if any) with the given Name in
2241  /// this context. Returns a range of iterators that contains all of
2242  /// the declarations with this name, with object, function, member,
2243  /// and enumerator names preceding any tag name. Note that this
2244  /// routine will not look into parent contexts.
2245  lookup_result lookup(DeclarationName Name) const;
2246 
2247  /// Find the declarations with the given name that are visible
2248  /// within this context; don't attempt to retrieve anything from an
2249  /// external source.
2250  lookup_result noload_lookup(DeclarationName Name);
2251 
2252  /// A simplistic name lookup mechanism that performs name lookup
2253  /// into this declaration context without consulting the external source.
2254  ///
2255  /// This function should almost never be used, because it subverts the
2256  /// usual relationship between a DeclContext and the external source.
2257  /// See the ASTImporter for the (few, but important) use cases.
2258  ///
2259  /// FIXME: This is very inefficient; replace uses of it with uses of
2260  /// noload_lookup.
2261  void localUncachedLookup(DeclarationName Name,
2262  SmallVectorImpl<NamedDecl *> &Results);
2263 
2264  /// Makes a declaration visible within this context.
2265  ///
2266  /// This routine makes the declaration D visible to name lookup
2267  /// within this context and, if this is a transparent context,
2268  /// within its parent contexts up to the first enclosing
2269  /// non-transparent context. Making a declaration visible within a
2270  /// context does not transfer ownership of a declaration, and a
2271  /// declaration can be visible in many contexts that aren't its
2272  /// lexical context.
2273  ///
2274  /// If D is a redeclaration of an existing declaration that is
2275  /// visible from this context, as determined by
2276  /// NamedDecl::declarationReplaces, the previous declaration will be
2277  /// replaced with D.
2278  void makeDeclVisibleInContext(NamedDecl *D);
2279 
2280  /// all_lookups_iterator - An iterator that provides a view over the results
2281  /// of looking up every possible name.
2282  class all_lookups_iterator;
2283 
2284  using lookups_range = llvm::iterator_range<all_lookups_iterator>;
2285 
2286  lookups_range lookups() const;
2287  // Like lookups(), but avoids loading external declarations.
2288  // If PreserveInternalState, avoids building lookup data structures too.
2289  lookups_range noload_lookups(bool PreserveInternalState) const;
2290 
2291  /// Iterators over all possible lookups within this context.
2292  all_lookups_iterator lookups_begin() const;
2293  all_lookups_iterator lookups_end() const;
2294 
2295  /// Iterators over all possible lookups within this context that are
2296  /// currently loaded; don't attempt to retrieve anything from an external
2297  /// source.
2298  all_lookups_iterator noload_lookups_begin() const;
2299  all_lookups_iterator noload_lookups_end() const;
2300 
2301  struct udir_iterator;
2302 
2303  using udir_iterator_base =
2304  llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
2305  std::random_access_iterator_tag,
2307 
2308  struct udir_iterator : udir_iterator_base {
2309  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
2310 
2311  UsingDirectiveDecl *operator*() const;
2312  };
2313 
2314  using udir_range = llvm::iterator_range<udir_iterator>;
2315 
2316  udir_range using_directives() const;
2317 
2318  // These are all defined in DependentDiagnostic.h.
2319  class ddiag_iterator;
2320 
2321  using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;
2322 
2323  inline ddiag_range ddiags() const;
2324 
2325  // Low-level accessors
2326 
2327  /// Mark that there are external lexical declarations that we need
2328  /// to include in our lookup table (and that are not available as external
2329  /// visible lookups). These extra lookup results will be found by walking
2330  /// the lexical declarations of this context. This should be used only if
2331  /// setHasExternalLexicalStorage() has been called on any decl context for
2332  /// which this is the primary context.
2334  assert(this == getPrimaryContext() &&
2335  "should only be called on primary context");
2336  DeclContextBits.HasLazyExternalLexicalLookups = true;
2337  }
2338 
2339  /// Retrieve the internal representation of the lookup structure.
2340  /// This may omit some names if we are lazily building the structure.
2341  StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
2342 
2343  /// Ensure the lookup structure is fully-built and return it.
2344  StoredDeclsMap *buildLookup();
2345 
2346  /// Whether this DeclContext has external storage containing
2347  /// additional declarations that are lexically in this context.
2349  return DeclContextBits.ExternalLexicalStorage;
2350  }
2351 
2352  /// State whether this DeclContext has external storage for
2353  /// declarations lexically in this context.
2354  void setHasExternalLexicalStorage(bool ES = true) const {
2355  DeclContextBits.ExternalLexicalStorage = ES;
2356  }
2357 
2358  /// Whether this DeclContext has external storage containing
2359  /// additional declarations that are visible in this context.
2361  return DeclContextBits.ExternalVisibleStorage;
2362  }
2363 
2364  /// State whether this DeclContext has external storage for
2365  /// declarations visible in this context.
2366  void setHasExternalVisibleStorage(bool ES = true) const {
2367  DeclContextBits.ExternalVisibleStorage = ES;
2368  if (ES && LookupPtr)
2369  DeclContextBits.NeedToReconcileExternalVisibleStorage = true;
2370  }
2371 
2372  /// Determine whether the given declaration is stored in the list of
2373  /// declarations lexically within this context.
2374  bool isDeclInLexicalTraversal(const Decl *D) const {
2375  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
2376  D == LastDecl);
2377  }
2378 
2379  bool setUseQualifiedLookup(bool use = true) const {
2380  bool old_value = DeclContextBits.UseQualifiedLookup;
2381  DeclContextBits.UseQualifiedLookup = use;
2382  return old_value;
2383  }
2384 
2386  return DeclContextBits.UseQualifiedLookup;
2387  }
2388 
2389  static bool classof(const Decl *D);
2390  static bool classof(const DeclContext *D) { return true; }
2391 
2392  void dumpDeclContext() const;
2393  void dumpLookups() const;
2394  void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
2395  bool Deserialize = false) const;
2396 
2397 private:
2398  /// Whether this declaration context has had externally visible
2399  /// storage added since the last lookup. In this case, \c LookupPtr's
2400  /// invariant may not hold and needs to be fixed before we perform
2401  /// another lookup.
2402  bool hasNeedToReconcileExternalVisibleStorage() const {
2403  return DeclContextBits.NeedToReconcileExternalVisibleStorage;
2404  }
2405 
2406  /// State that this declaration context has had externally visible
2407  /// storage added since the last lookup. In this case, \c LookupPtr's
2408  /// invariant may not hold and needs to be fixed before we perform
2409  /// another lookup.
2410  void setNeedToReconcileExternalVisibleStorage(bool Need = true) const {
2411  DeclContextBits.NeedToReconcileExternalVisibleStorage = Need;
2412  }
2413 
2414  /// If \c true, this context may have local lexical declarations
2415  /// that are missing from the lookup table.
2416  bool hasLazyLocalLexicalLookups() const {
2417  return DeclContextBits.HasLazyLocalLexicalLookups;
2418  }
2419 
2420  /// If \c true, this context may have local lexical declarations
2421  /// that are missing from the lookup table.
2422  void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const {
2423  DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL;
2424  }
2425 
2426  /// If \c true, the external source may have lexical declarations
2427  /// that are missing from the lookup table.
2428  bool hasLazyExternalLexicalLookups() const {
2429  return DeclContextBits.HasLazyExternalLexicalLookups;
2430  }
2431 
2432  /// If \c true, the external source may have lexical declarations
2433  /// that are missing from the lookup table.
2434  void setHasLazyExternalLexicalLookups(bool HasLELL = true) const {
2435  DeclContextBits.HasLazyExternalLexicalLookups = HasLELL;
2436  }
2437 
2438  void reconcileExternalVisibleStorage() const;
2439  bool LoadLexicalDeclsFromExternalStorage() const;
2440 
2441  /// Makes a declaration visible within this context, but
2442  /// suppresses searches for external declarations with the same
2443  /// name.
2444  ///
2445  /// Analogous to makeDeclVisibleInContext, but for the exclusive
2446  /// use of addDeclInternal().
2447  void makeDeclVisibleInContextInternal(NamedDecl *D);
2448 
2449  StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
2450 
2451  void loadLazyLocalLexicalLookups();
2452  void buildLookupImpl(DeclContext *DCtx, bool Internal);
2453  void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
2454  bool Rediscoverable);
2455  void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
2456 };
2457 
2458 inline bool Decl::isTemplateParameter() const {
2459  return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
2460  getKind() == TemplateTemplateParm;
2461 }
2462 
2463 // Specialization selected when ToTy is not a known subclass of DeclContext.
2464 template <class ToTy,
2465  bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
2467  static const ToTy *doit(const DeclContext *Val) {
2468  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
2469  }
2470 
2471  static ToTy *doit(DeclContext *Val) {
2472  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
2473  }
2474 };
2475 
2476 // Specialization selected when ToTy is a known subclass of DeclContext.
2477 template <class ToTy>
2479  static const ToTy *doit(const DeclContext *Val) {
2480  return static_cast<const ToTy*>(Val);
2481  }
2482 
2483  static ToTy *doit(DeclContext *Val) {
2484  return static_cast<ToTy*>(Val);
2485  }
2486 };
2487 
2488 } // namespace clang
2489 
2490 namespace llvm {
2491 
2492 /// isa<T>(DeclContext*)
2493 template <typename To>
2494 struct isa_impl<To, ::clang::DeclContext> {
2495  static bool doit(const ::clang::DeclContext &Val) {
2496  return To::classofKind(Val.getDeclKind());
2497  }
2498 };
2499 
2500 /// cast<T>(DeclContext*)
2501 template<class ToTy>
2502 struct cast_convert_val<ToTy,
2503  const ::clang::DeclContext,const ::clang::DeclContext> {
2504  static const ToTy &doit(const ::clang::DeclContext &Val) {
2506  }
2507 };
2508 
2509 template<class ToTy>
2510 struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
2511  static ToTy &doit(::clang::DeclContext &Val) {
2513  }
2514 };
2515 
2516 template<class ToTy>
2517 struct cast_convert_val<ToTy,
2518  const ::clang::DeclContext*, const ::clang::DeclContext*> {
2519  static const ToTy *doit(const ::clang::DeclContext *Val) {
2520  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2521  }
2522 };
2523 
2524 template<class ToTy>
2525 struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
2526  static ToTy *doit(::clang::DeclContext *Val) {
2527  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
2528  }
2529 };
2530 
2531 /// Implement cast_convert_val for Decl -> DeclContext conversions.
2532 template<class FromTy>
2533 struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
2534  static ::clang::DeclContext &doit(const FromTy &Val) {
2535  return *FromTy::castToDeclContext(&Val);
2536  }
2537 };
2538 
2539 template<class FromTy>
2540 struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
2541  static ::clang::DeclContext *doit(const FromTy *Val) {
2542  return FromTy::castToDeclContext(Val);
2543  }
2544 };
2545 
2546 template<class FromTy>
2547 struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
2548  static const ::clang::DeclContext &doit(const FromTy &Val) {
2549  return *FromTy::castToDeclContext(&Val);
2550  }
2551 };
2552 
2553 template<class FromTy>
2554 struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
2555  static const ::clang::DeclContext *doit(const FromTy *Val) {
2556  return FromTy::castToDeclContext(Val);
2557  }
2558 };
2559 
2560 } // namespace llvm
2561 
2562 #endif // LLVM_CLANG_AST_DECLBASE_H
const Decl * getPreviousDecl() const
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:964
bool shouldUseQualifiedLookup() const
Definition: DeclBase.h:2385
specific_decl_iterator & operator++()
Definition: DeclBase.h:2096
void setImplicit(bool I=true)
Definition: DeclBase.h:559
Represents a function declaration or definition.
Definition: Decl.h:1783
redecl_iterator operator++(int)
Definition: DeclBase.h:929
const Decl * getCanonicalDecl() const
Definition: DeclBase.h:878
decl_iterator noload_decls_begin() const
Definition: DeclBase.h:2044
llvm::iterator_range< redecl_iterator > redecl_range
Definition: DeclBase.h:944
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:879
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:759
const char * getDeclKindName() const
Definition: DeclBase.cpp:123
llvm::PointerIntPair< Decl *, 2, ModuleOwnershipKind > NextInContextAndBits
The next declaration within the same lexical DeclContext.
Definition: DeclBase.h:244
static Decl * castFromDeclContext(const DeclContext *)
Definition: DeclBase.cpp:860
bool isClosure() const
Definition: DeclBase.h:1817
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:1849
virtual Stmt * getBody() const
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: DeclBase.h:986
void setAttrs(const AttrVec &Attrs)
Definition: DeclBase.h:486
Specialize PointerLikeTypeTraits to allow LazyGenerationalUpdatePtr to be placed into a PointerUnion...
Definition: Dominators.h:30
Module * getOwningModuleForLinkage(bool IgnoreLinkage=false) const
Get the module that owns this declaration for linkage purposes.
Definition: Decl.cpp:1511
attr_iterator attr_begin() const
Definition: DeclBase.h:505
specific_attr_iterator< T > specific_attr_begin() const
Definition: DeclBase.h:529
Stmt - This represents one statement.
Definition: Stmt.h:66
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3422
unsigned CacheValidAndLinkage
If 0, we have not computed the linkage of this declaration.
Definition: DeclBase.h:335
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
specific_attr_iterator - Iterates over a subrange of an AttrVec, only providing attributes that are o...
Definition: AttrIterator.h:34
friend bool operator==(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2108
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:421
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:2087
static void add(Kind k)
Definition: DeclBase.cpp:193
Not a friend object.
Definition: DeclBase.h:1102
Decl * getPreviousDecl()
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:960
static bool doit(const ::clang::DeclContext &Val)
Definition: DeclBase.h:2495
bool isObjCContainer() const
Definition: DeclBase.h:1823
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:425
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:113
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:2374
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2471
bool hasExternalVisibleStorage() const
Whether this DeclContext has external storage containing additional declarations that are visible in ...
Definition: DeclBase.h:2360
Iterates over a filtered subrange of declarations stored in a DeclContext.
Definition: DeclBase.h:2129
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:799
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2383
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:325
redecl_iterator & operator++()
Definition: DeclBase.h:920
reference back() const
Definition: DeclBase.h:1243
ModuleOwnershipKind
The kind of ownership a declaration has, for visibility purposes.
Definition: DeclBase.h:218
bool hasOwningModule() const
Is this declaration owned by some module?
Definition: DeclBase.h:754
ASTMutationListener * getASTMutationListener() const
Definition: DeclBase.cpp:381
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:2033
bool hasLocalOwningModuleStorage() const
Definition: DeclBase.cpp:119
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:138
reference front() const
Definition: DeclBase.h:1242
bool isInvalidDecl() const
Definition: DeclBase.h:553
friend bool operator!=(const specific_decl_iterator &x, const specific_decl_iterator &y)
Definition: DeclBase.h:2113
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:435
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:47
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:211
BlockDeclBitfields BlockDeclBits
Definition: DeclBase.h:1730
Module * getLocalOwningModule() const
Get the local owning module, if known.
Definition: DeclBase.h:738
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
Decl(Kind DK, EmptyShell Empty)
Definition: DeclBase.h:389
value_type operator->() const
Definition: DeclBase.h:2007
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:132
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:3748
CXXConstructorDeclBitfields CXXConstructorDeclBits
Definition: DeclBase.h:1726
void dumpColor() const
Definition: ASTDumper.cpp:199
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:84
One of these records is kept for each identifier that is lexed.
void setHasExternalLexicalStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations lexically in this context...
Definition: DeclBase.h:2354
void print(raw_ostream &Out, unsigned Indentation=0, bool PrintInstantiation=false) const
bool isInAnonymousNamespace() const
Definition: DeclBase.cpp:347
LinkageSpecDeclBitfields LinkageSpecDeclBits
Definition: DeclBase.h:1729
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:168
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1195
attr_iterator attr_end() const
Definition: DeclBase.h:508
specific_decl_iterator operator++(int)
Definition: DeclBase.h:2102
friend class DeclContext
Definition: DeclBase.h:247
llvm::iterator_range< decl_iterator > decl_range
Definition: DeclBase.h:2029
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:911
This declaration is a friend function.
Definition: DeclBase.h:154
bool isNamespace() const
Definition: DeclBase.h:1868
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:780
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:417
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:630
__SIZE_TYPE__ size_t
The unsigned integer type of the result of the sizeof operator.
Definition: opencl-c-base.h:40
bool isDefinedOutsideFunctionOrMethod() const
isDefinedOutsideFunctionOrMethod - This predicate returns true if this scoped decl is defined outside...
Definition: DeclBase.h:855
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:803
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1908
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:328
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:212
specific_attr_iterator< T > specific_attr_end() const
Definition: DeclBase.h:534
Describes a module or submodule.
Definition: Module.h:64
bool isDeprecated(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;deprecated&#39;.
Definition: DeclBase.h:671
friend bool operator!=(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2189
iterator(pointer Pos, value_type Single=nullptr)
Definition: DeclBase.h:1224
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:983
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:423
Namespaces, declared with &#39;namespace foo {}&#39;.
Definition: DeclBase.h:142
bool hasTagIdentifierNamespace() const
Definition: DeclBase.h:809
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const DeclContext * getLexicalDeclContext() const
Definition: DeclBase.h:833
ModuleOwnershipKind getModuleOwnershipKind() const
Get the kind of module ownership for this declaration.
Definition: DeclBase.h:786
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:1998
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:2165
static bool isStdNamespace(const DeclContext *DC)
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1104
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2075
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1247
void setMustBuildLookupTable()
Mark that there are external lexical declarations that we need to include in our lookup table (and th...
Definition: DeclBase.h:2333
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1166
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:828
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2074
Labels, declared with &#39;x:&#39; and referenced with &#39;goto x&#39;.
Definition: DeclBase.h:119
void setLocalOwningModule(Module *M)
Definition: DeclBase.h:746
Represents a linkage specification.
Definition: DeclCXX.h:2778
::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2541
virtual Decl * getMostRecentDeclImpl()
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: DeclBase.h:898
Ordinary names.
Definition: DeclBase.h:146
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:407
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:877
Decl & operator=(const Decl &)=delete
Language
The language for the input, used to select and validate the language standard and possible actions...
Definition: LangStandard.h:19
AvailabilityResult
Captures the result of checking the availability of a declaration.
Definition: DeclBase.h:74
NodeId Parent
Definition: ASTDiff.cpp:191
Decl * getNextDeclInContext()
Definition: DeclBase.h:435
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:640
bool hasAttr() const
Definition: DeclBase.h:542
DeclContextBitfields DeclContextBits
Definition: DeclBase.h:1720
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:104
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:574
This declaration is a C++ operator declared in a non-class context.
Definition: DeclBase.h:170
Objective C @protocol.
Definition: DeclBase.h:149
llvm::iterator_range< udir_iterator > udir_range
Definition: DeclBase.h:2314
decl_range noload_decls() const
noload_decls_begin/end - Iterate over the declarations stored in this context that are currently load...
Definition: DeclBase.h:2041
std::ptrdiff_t difference_type
Definition: DeclBase.h:912
const DeclContext * getLookupParent() const
Definition: DeclBase.h:1809
const FunctionType * getFunctionType(bool BlocksToo=true) const
Looks through the Decl&#39;s underlying type to extract a FunctionType when possible. ...
Definition: DeclBase.cpp:954
This declaration is a friend class.
Definition: DeclBase.h:159
const Decl * getNonClosureContext() const
Definition: DeclBase.h:453
int64_t getID() const
Definition: DeclBase.cpp:950
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1800
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:883
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:4037
const Attr * getDefiningAttr() const
Return this declaration&#39;s defining attribute if it has one.
Definition: DeclBase.cpp:460
llvm::iterator_range< all_lookups_iterator > lookups_range
Definition: DeclBase.h:2284
static bool classofKind(Kind K)
Definition: DeclBase.h:1127
static unsigned getIdentifierNamespaceForKind(Kind DK)
Definition: DeclBase.cpp:689
StoredDeclsMap * getLookupPtr() const
Retrieve the internal representation of the lookup structure.
Definition: DeclBase.h:2341
ASTDumpOutputFormat
Used to specify the format for printing AST dump information.
#define V(N, I)
Definition: ASTContext.h:2941
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:180
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:558
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:729
Decl * getMostRecentDecl()
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:975
DeclContextLookupResult(ArrayRef< NamedDecl *> Result)
Definition: DeclBase.h:1208
const Decl * getNextDeclInContext() const
Definition: DeclBase.h:436
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1060
bool isFileContext() const
Definition: DeclBase.h:1854
DeclContext * getDeclContext()
Definition: DeclBase.h:438
SourceLocation Begin
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
redecl_iterator redecls_end() const
Definition: DeclBase.h:956
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2458
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
This declaration is an OpenMP user defined mapper.
Definition: DeclBase.h:183
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:621
llvm::iterator_range< attr_iterator > attr_range
Definition: DeclBase.h:499
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
const DeclContext * getParent() const
Definition: DeclBase.h:1787
bool isFunctionOrMethod() const
Definition: DeclBase.h:1836
reference operator[](size_t N) const
Definition: DeclBase.h:1244
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:385
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1784
SourceLocation getEnd() const
void setLocation(SourceLocation L)
Definition: DeclBase.h:430
const FunctionDecl * getAsFunction() const
Definition: DeclBase.h:1032
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1842
The result type of a method or function.
unsigned IdentifierNamespace
IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
Definition: DeclBase.h:331
const SourceManager & SM
Definition: Format.cpp:1685
FunctionDeclBitfields FunctionDeclBits
Definition: DeclBase.h:1725
const DeclContext * getDeclContext() const
Definition: DeclBase.h:443
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
reference operator*() const
Definition: DeclBase.h:917
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1111
static bool isTagIdentifierNamespace(unsigned NS)
Definition: DeclBase.h:813
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2366
AttrVec & getAttrs()
Definition: DeclBase.h:490
virtual bool hasBody() const
Returns true if this Decl represents a declaration for a body of code, such as a function or method d...
Definition: DeclBase.h:992
bool hasAttrs() const
Definition: DeclBase.h:484
filtered_decl_iterator & operator++()
Definition: DeclBase.h:2172
static const ::clang::DeclContext * doit(const FromTy *Val)
Definition: DeclBase.h:2555
iterator::reference reference
Definition: DeclBase.h:1234
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:1777
This declaration has an owning module, but is globally visible (typically because its owning module i...
#define false
Definition: stdbool.h:17
Iterates through all the redeclarations of the same decl.
Definition: DeclBase.h:902
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
Decl()=delete
VersionTuple getVersionIntroduced() const
Retrieve the version of the target platform in which this declaration was introduced.
Definition: DeclBase.cpp:626
Encodes a location in the source.
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:597
Members, declared with object declarations within tag definitions.
Definition: DeclBase.h:138
all_lookups_iterator - An iterator that provides a view over the results of looking up every possible...
Definition: DeclLookups.h:28
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:791
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:102
The nullability qualifier is set when the nullability of the result or parameter was expressed via a ...
Definition: DeclBase.h:212
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3219
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:377
void setReferenced(bool R=true)
Definition: DeclBase.h:588
static bool classof(const DeclContext *D)
Definition: DeclBase.h:2390
std::forward_iterator_tag iterator_category
Definition: DeclBase.h:2153
udir_iterator(lookup_iterator I)
Definition: DeclBase.h:2309
bool hasCachedLinkage() const
Definition: DeclBase.h:411
A friend of a previously-declared entity.
Definition: DeclBase.h:1103
DeclContextLookupResult(NamedDecl *Single)
Definition: DeclBase.h:1210
bool hasExternalLexicalStorage() const
Whether this DeclContext has external storage containing additional declarations that are lexically i...
Definition: DeclBase.h:2348
::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2534
Linkage getCachedLinkage() const
Definition: DeclBase.h:403
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:702
friend bool operator==(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:935
llvm::iterator_range< DeclContext::ddiag_iterator > ddiag_range
Definition: DeclBase.h:2321
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:398
virtual Decl * getNextRedeclarationImpl()
Returns the next redeclaration or itself if this is the only decl.
Definition: DeclBase.h:890
static ToTy * doit(DeclContext *Val)
Definition: DeclBase.h:2483
decl_iterator noload_decls_end() const
Definition: DeclBase.h:2045
void dropAttrs()
Definition: DeclBase.cpp:825
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:670
Defines various enumerations that describe declaration and type specifiers.
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1990
bool isThisDeclarationReferenced() const
Whether this declaration was referenced.
Definition: DeclBase.h:586
redecl_iterator redecls_begin() const
Definition: DeclBase.h:952
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:948
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2467
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:1271
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:402
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:593
const Decl * getMostRecentDecl() const
Retrieve the most recent declaration that declares the same entity as this declaration (which may be ...
Definition: DeclBase.h:979
bool isFunctionOrFunctionTemplate() const
Whether this declaration is a function or function template.
Definition: DeclBase.h:1018
bool isRecord() const
Definition: DeclBase.h:1863
attr_range attrs() const
Definition: DeclBase.h:501
friend bool operator!=(redecl_iterator x, redecl_iterator y)
Definition: DeclBase.h:939
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:340
AttrVec::const_iterator attr_iterator
Definition: DeclBase.h:498
AccessSpecifier getAccess() const
Definition: DeclBase.h:473
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:117
The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:432
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:994
decl_iterator operator++(int)
Definition: DeclBase.h:2014
const Decl * getNonClosureAncestor() const
Definition: DeclBase.h:1920
Represents an enum.
Definition: Decl.h:3481
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:127
EnumDeclBitfields EnumDeclBits
Definition: DeclBase.h:1722
bool isHidden() const
Determine whether this declaration might be hidden from name lookup.
Definition: DeclBase.h:774
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:2053
This declaration is not owned by a module.
void setObjectOfFriendDecl(bool PerformFriendInjection=false)
Changes the namespace of this declaration to reflect that it&#39;s the object of a friend declaration...
Definition: DeclBase.h:1071
A dependently-generated diagnostic.
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it&#39;s a function-local extern declaration...
Definition: DeclBase.h:1042
const RecordDecl * getOuterLexicalRecordContext() const
Definition: DeclBase.h:1951
void setIsUsed()
Set whether the declaration is used, in the sense of odr-use.
Definition: DeclBase.h:573
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:1120
T * getAttr() const
Definition: DeclBase.h:538
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:714
virtual ~Decl()
filtered_decl_iterator operator++(int)
Definition: DeclBase.h:2178
const DeclContext * getLexicalParent() const
Definition: DeclBase.h:1803
unsigned getGlobalID() const
Retrieve the global declaration ID associated with this declaration, which specifies where this Decl ...
Definition: DeclBase.h:706
An iterator over the dependent diagnostics in a dependent context.
iterator::pointer pointer
Definition: DeclBase.h:1233
ObjCMethodDeclBitfields ObjCMethodDeclBits
Definition: DeclBase.h:1727
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:413
llvm::iterator_range< specific_attr_iterator< T > > specific_attrs() const
Definition: DeclBase.h:524
static const ::clang::DeclContext & doit(const FromTy &Val)
Definition: DeclBase.h:2548
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c-base.h:48
Defines the clang::SourceLocation class and associated facilities.
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: DeclBase.h:969
friend bool operator==(const filtered_decl_iterator &x, const filtered_decl_iterator &y)
Definition: DeclBase.h:2184
ObjCDeclQualifier
ObjCDeclQualifier - &#39;Qualifiers&#39; written next to the return and parameter types in method declaration...
Definition: DeclBase.h:200
decl_iterator & operator++()
Definition: DeclBase.h:2009
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, SourceManager &sm, const char *Msg)
Definition: DeclBase.h:1185
bool setUseQualifiedLookup(bool use=true) const
Definition: DeclBase.h:2379
const DeclContext * getEnclosingNamespaceContext() const
Definition: DeclBase.h:1945
value_type operator->() const
Definition: DeclBase.h:918
RecordDeclBitfields RecordDeclBits
Definition: DeclBase.h:1723
const DeclContext * getPrimaryContext() const
Definition: DeclBase.h:1931
Decl(Kind DK, DeclContext *DC, SourceLocation L)
Definition: DeclBase.h:379
virtual Decl * getPreviousDeclImpl()
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: DeclBase.h:894
void addAttr(Attr *A)
Definition: DeclBase.cpp:832
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:96
static const ToTy * doit(const DeclContext *Val)
Definition: DeclBase.h:2479
friend class CXXClassMemberWrapper
Definition: DeclBase.h:319
ASTContext & getParentASTContext() const
Definition: DeclBase.h:1813
Kind
Lists the kind of concrete classes of Decl.
Definition: DeclBase.h:91
void dump() const
Definition: ASTDumper.cpp:179
The top declaration context.
Definition: Decl.h:82
static void PrintStats()
Definition: DeclBase.cpp:169
This declaration is a function-local extern declaration of a variable or function.
Definition: DeclBase.h:177
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1171
static void EnableStatistics()
Definition: DeclBase.cpp:165
friend bool operator==(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:2020
ObjCContainerDeclBitfields ObjCContainerDeclBits
Definition: DeclBase.h:1728
AccessSpecifier getAccessUnsafe() const
Retrieve the access specifier for this declaration, even though it may not yet have been properly set...
Definition: DeclBase.h:480
#define true
Definition: stdbool.h:16
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:607
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits
Definition: DeclBase.h:1724
This represents a decl that may have a name.
Definition: Decl.h:223
bool isTranslationUnit() const
Definition: DeclBase.h:1859
void dropAttr()
Definition: DeclBase.h:513
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:468
const TranslationUnitDecl * getTranslationUnitDecl() const
Definition: DeclBase.h:458
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:2863
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:456
bool isInStdNamespace() const
Definition: DeclBase.cpp:357
SourceLocation getBegin() const
TranslationUnitDecl * getTranslationUnitDecl()
Definition: DeclBase.cpp:362
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:898
Attr - This represents one attribute.
Definition: Attr.h:45
SourceLocation getLocation() const
Definition: DeclBase.h:429
TagDeclBitfields TagDeclBits
Definition: DeclBase.h:1721
friend bool operator!=(decl_iterator x, decl_iterator y)
Definition: DeclBase.h:2024
const DeclContext * getRedeclContext() const
Definition: DeclBase.h:1939
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:680
decl_iterator decls_end() const
Definition: DeclBase.h:2035
This declaration is a using declaration.
Definition: DeclBase.h:165
std::iterator_traits< DeclContext::decl_iterator >::difference_type difference_type
Definition: DeclBase.h:2152
DeclContext * getParentFunctionOrMethod()
Definition: DeclBase.h:871
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1178