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Decl.h
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1 //===- Decl.h - 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 subclasses.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_AST_DECL_H
14 #define LLVM_CLANG_AST_DECL_H
15 
16 #include "clang/AST/APValue.h"
18 #include "clang/AST/DeclBase.h"
22 #include "clang/AST/Redeclarable.h"
23 #include "clang/AST/Type.h"
25 #include "clang/Basic/Diagnostic.h"
27 #include "clang/Basic/LLVM.h"
28 #include "clang/Basic/Linkage.h"
33 #include "clang/Basic/Specifiers.h"
34 #include "clang/Basic/Visibility.h"
35 #include "llvm/ADT/APSInt.h"
36 #include "llvm/ADT/ArrayRef.h"
37 #include "llvm/ADT/Optional.h"
38 #include "llvm/ADT/PointerIntPair.h"
39 #include "llvm/ADT/PointerUnion.h"
40 #include "llvm/ADT/StringRef.h"
41 #include "llvm/ADT/iterator_range.h"
42 #include "llvm/Support/Casting.h"
43 #include "llvm/Support/Compiler.h"
44 #include "llvm/Support/TrailingObjects.h"
45 #include <cassert>
46 #include <cstddef>
47 #include <cstdint>
48 #include <string>
49 #include <utility>
50 
51 namespace clang {
52 
53 class ASTContext;
54 struct ASTTemplateArgumentListInfo;
55 class Attr;
56 class CompoundStmt;
57 class DependentFunctionTemplateSpecializationInfo;
58 class EnumDecl;
59 class Expr;
60 class FunctionTemplateDecl;
61 class FunctionTemplateSpecializationInfo;
62 class LabelStmt;
63 class MemberSpecializationInfo;
64 class Module;
65 class NamespaceDecl;
66 class ParmVarDecl;
67 class RecordDecl;
68 class Stmt;
69 class StringLiteral;
70 class TagDecl;
71 class TemplateArgumentList;
72 class TemplateArgumentListInfo;
73 class TemplateParameterList;
74 class TypeAliasTemplateDecl;
75 class TypeLoc;
76 class UnresolvedSetImpl;
77 class VarTemplateDecl;
78 
79 /// A container of type source information.
80 ///
81 /// A client can read the relevant info using TypeLoc wrappers, e.g:
82 /// @code
83 /// TypeLoc TL = TypeSourceInfo->getTypeLoc();
84 /// TL.getBeginLoc().print(OS, SrcMgr);
85 /// @endcode
86 class alignas(8) TypeSourceInfo {
87  // Contains a memory block after the class, used for type source information,
88  // allocated by ASTContext.
89  friend class ASTContext;
90 
91  QualType Ty;
92 
93  TypeSourceInfo(QualType ty) : Ty(ty) {}
94 
95 public:
96  /// Return the type wrapped by this type source info.
97  QualType getType() const { return Ty; }
98 
99  /// Return the TypeLoc wrapper for the type source info.
100  TypeLoc getTypeLoc() const; // implemented in TypeLoc.h
101 
102  /// Override the type stored in this TypeSourceInfo. Use with caution!
103  void overrideType(QualType T) { Ty = T; }
104 };
105 
106 /// The top declaration context.
107 class TranslationUnitDecl : public Decl, public DeclContext {
108  ASTContext &Ctx;
109 
110  /// The (most recently entered) anonymous namespace for this
111  /// translation unit, if one has been created.
112  NamespaceDecl *AnonymousNamespace = nullptr;
113 
114  explicit TranslationUnitDecl(ASTContext &ctx);
115 
116  virtual void anchor();
117 
118 public:
119  ASTContext &getASTContext() const { return Ctx; }
120 
121  NamespaceDecl *getAnonymousNamespace() const { return AnonymousNamespace; }
122  void setAnonymousNamespace(NamespaceDecl *D) { AnonymousNamespace = D; }
123 
125 
126  // Implement isa/cast/dyncast/etc.
127  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
128  static bool classofKind(Kind K) { return K == TranslationUnit; }
130  return static_cast<DeclContext *>(const_cast<TranslationUnitDecl*>(D));
131  }
133  return static_cast<TranslationUnitDecl *>(const_cast<DeclContext*>(DC));
134  }
135 };
136 
137 /// Represents a `#pragma comment` line. Always a child of
138 /// TranslationUnitDecl.
139 class PragmaCommentDecl final
140  : public Decl,
141  private llvm::TrailingObjects<PragmaCommentDecl, char> {
142  friend class ASTDeclReader;
143  friend class ASTDeclWriter;
144  friend TrailingObjects;
145 
146  PragmaMSCommentKind CommentKind;
147 
149  PragmaMSCommentKind CommentKind)
150  : Decl(PragmaComment, TU, CommentLoc), CommentKind(CommentKind) {}
151 
152  virtual void anchor();
153 
154 public:
156  SourceLocation CommentLoc,
157  PragmaMSCommentKind CommentKind,
158  StringRef Arg);
159  static PragmaCommentDecl *CreateDeserialized(ASTContext &C, unsigned ID,
160  unsigned ArgSize);
161 
162  PragmaMSCommentKind getCommentKind() const { return CommentKind; }
163 
164  StringRef getArg() const { return getTrailingObjects<char>(); }
165 
166  // Implement isa/cast/dyncast/etc.
167  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
168  static bool classofKind(Kind K) { return K == PragmaComment; }
169 };
170 
171 /// Represents a `#pragma detect_mismatch` line. Always a child of
172 /// TranslationUnitDecl.
174  : public Decl,
175  private llvm::TrailingObjects<PragmaDetectMismatchDecl, char> {
176  friend class ASTDeclReader;
177  friend class ASTDeclWriter;
178  friend TrailingObjects;
179 
180  size_t ValueStart;
181 
183  size_t ValueStart)
184  : Decl(PragmaDetectMismatch, TU, Loc), ValueStart(ValueStart) {}
185 
186  virtual void anchor();
187 
188 public:
191  SourceLocation Loc, StringRef Name,
192  StringRef Value);
193  static PragmaDetectMismatchDecl *
194  CreateDeserialized(ASTContext &C, unsigned ID, unsigned NameValueSize);
195 
196  StringRef getName() const { return getTrailingObjects<char>(); }
197  StringRef getValue() const { return getTrailingObjects<char>() + ValueStart; }
198 
199  // Implement isa/cast/dyncast/etc.
200  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
201  static bool classofKind(Kind K) { return K == PragmaDetectMismatch; }
202 };
203 
204 /// Declaration context for names declared as extern "C" in C++. This
205 /// is neither the semantic nor lexical context for such declarations, but is
206 /// used to check for conflicts with other extern "C" declarations. Example:
207 ///
208 /// \code
209 /// namespace N { extern "C" void f(); } // #1
210 /// void N::f() {} // #2
211 /// namespace M { extern "C" void f(); } // #3
212 /// \endcode
213 ///
214 /// The semantic context of #1 is namespace N and its lexical context is the
215 /// LinkageSpecDecl; the semantic context of #2 is namespace N and its lexical
216 /// context is the TU. However, both declarations are also visible in the
217 /// extern "C" context.
218 ///
219 /// The declaration at #3 finds it is a redeclaration of \c N::f through
220 /// lookup in the extern "C" context.
221 class ExternCContextDecl : public Decl, public DeclContext {
223  : Decl(ExternCContext, TU, SourceLocation()),
224  DeclContext(ExternCContext) {}
225 
226  virtual void anchor();
227 
228 public:
229  static ExternCContextDecl *Create(const ASTContext &C,
230  TranslationUnitDecl *TU);
231 
232  // Implement isa/cast/dyncast/etc.
233  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
234  static bool classofKind(Kind K) { return K == ExternCContext; }
236  return static_cast<DeclContext *>(const_cast<ExternCContextDecl*>(D));
237  }
239  return static_cast<ExternCContextDecl *>(const_cast<DeclContext*>(DC));
240  }
241 };
242 
243 /// This represents a decl that may have a name. Many decls have names such
244 /// as ObjCMethodDecl, but not \@class, etc.
245 ///
246 /// Note that not every NamedDecl is actually named (e.g., a struct might
247 /// be anonymous), and not every name is an identifier.
248 class NamedDecl : public Decl {
249  /// The name of this declaration, which is typically a normal
250  /// identifier but may also be a special kind of name (C++
251  /// constructor, Objective-C selector, etc.)
252  DeclarationName Name;
253 
254  virtual void anchor();
255 
256 private:
257  NamedDecl *getUnderlyingDeclImpl() LLVM_READONLY;
258 
259 protected:
261  : Decl(DK, DC, L), Name(N) {}
262 
263 public:
264  /// Get the identifier that names this declaration, if there is one.
265  ///
266  /// This will return NULL if this declaration has no name (e.g., for
267  /// an unnamed class) or if the name is a special name (C++ constructor,
268  /// Objective-C selector, etc.).
270 
271  /// Get the name of identifier for this declaration as a StringRef.
272  ///
273  /// This requires that the declaration have a name and that it be a simple
274  /// identifier.
275  StringRef getName() const {
276  assert(Name.isIdentifier() && "Name is not a simple identifier");
277  return getIdentifier() ? getIdentifier()->getName() : "";
278  }
279 
280  /// Get a human-readable name for the declaration, even if it is one of the
281  /// special kinds of names (C++ constructor, Objective-C selector, etc).
282  ///
283  /// Creating this name requires expensive string manipulation, so it should
284  /// be called only when performance doesn't matter. For simple declarations,
285  /// getNameAsCString() should suffice.
286  //
287  // FIXME: This function should be renamed to indicate that it is not just an
288  // alternate form of getName(), and clients should move as appropriate.
289  //
290  // FIXME: Deprecated, move clients to getName().
291  std::string getNameAsString() const { return Name.getAsString(); }
292 
293  virtual void printName(raw_ostream &os) const;
294 
295  /// Get the actual, stored name of the declaration, which may be a special
296  /// name.
297  DeclarationName getDeclName() const { return Name; }
298 
299  /// Set the name of this declaration.
300  void setDeclName(DeclarationName N) { Name = N; }
301 
302  /// Returns a human-readable qualified name for this declaration, like
303  /// A::B::i, for i being member of namespace A::B.
304  ///
305  /// If the declaration is not a member of context which can be named (record,
306  /// namespace), it will return the same result as printName().
307  ///
308  /// Creating this name is expensive, so it should be called only when
309  /// performance doesn't matter.
310  void printQualifiedName(raw_ostream &OS) const;
311  void printQualifiedName(raw_ostream &OS, const PrintingPolicy &Policy) const;
312 
313  /// Print only the nested name specifier part of a fully-qualified name,
314  /// including the '::' at the end. E.g.
315  /// when `printQualifiedName(D)` prints "A::B::i",
316  /// this function prints "A::B::".
317  void printNestedNameSpecifier(raw_ostream &OS) const;
318  void printNestedNameSpecifier(raw_ostream &OS,
319  const PrintingPolicy &Policy) const;
320 
321  // FIXME: Remove string version.
322  std::string getQualifiedNameAsString() const;
323 
324  /// Appends a human-readable name for this declaration into the given stream.
325  ///
326  /// This is the method invoked by Sema when displaying a NamedDecl
327  /// in a diagnostic. It does not necessarily produce the same
328  /// result as printName(); for example, class template
329  /// specializations are printed with their template arguments.
330  virtual void getNameForDiagnostic(raw_ostream &OS,
331  const PrintingPolicy &Policy,
332  bool Qualified) const;
333 
334  /// Determine whether this declaration, if known to be well-formed within
335  /// its context, will replace the declaration OldD if introduced into scope.
336  ///
337  /// A declaration will replace another declaration if, for example, it is
338  /// a redeclaration of the same variable or function, but not if it is a
339  /// declaration of a different kind (function vs. class) or an overloaded
340  /// function.
341  ///
342  /// \param IsKnownNewer \c true if this declaration is known to be newer
343  /// than \p OldD (for instance, if this declaration is newly-created).
344  bool declarationReplaces(NamedDecl *OldD, bool IsKnownNewer = true) const;
345 
346  /// Determine whether this declaration has linkage.
347  bool hasLinkage() const;
348 
349  using Decl::isModulePrivate;
351 
352  /// Determine whether this declaration is a C++ class member.
353  bool isCXXClassMember() const {
354  const DeclContext *DC = getDeclContext();
355 
356  // C++0x [class.mem]p1:
357  // The enumerators of an unscoped enumeration defined in
358  // the class are members of the class.
359  if (isa<EnumDecl>(DC))
360  DC = DC->getRedeclContext();
361 
362  return DC->isRecord();
363  }
364 
365  /// Determine whether the given declaration is an instance member of
366  /// a C++ class.
367  bool isCXXInstanceMember() const;
368 
369  /// Determine what kind of linkage this entity has.
370  ///
371  /// This is not the linkage as defined by the standard or the codegen notion
372  /// of linkage. It is just an implementation detail that is used to compute
373  /// those.
374  Linkage getLinkageInternal() const;
375 
376  /// Get the linkage from a semantic point of view. Entities in
377  /// anonymous namespaces are external (in c++98).
379  return clang::getFormalLinkage(getLinkageInternal());
380  }
381 
382  /// True if this decl has external linkage.
384  return isExternalFormalLinkage(getLinkageInternal());
385  }
386 
387  bool isExternallyVisible() const {
388  return clang::isExternallyVisible(getLinkageInternal());
389  }
390 
391  /// Determine whether this declaration can be redeclared in a
392  /// different translation unit.
393  bool isExternallyDeclarable() const {
394  return isExternallyVisible() && !getOwningModuleForLinkage();
395  }
396 
397  /// Determines the visibility of this entity.
399  return getLinkageAndVisibility().getVisibility();
400  }
401 
402  /// Determines the linkage and visibility of this entity.
403  LinkageInfo getLinkageAndVisibility() const;
404 
405  /// Kinds of explicit visibility.
407  /// Do an LV computation for, ultimately, a type.
408  /// Visibility may be restricted by type visibility settings and
409  /// the visibility of template arguments.
411 
412  /// Do an LV computation for, ultimately, a non-type declaration.
413  /// Visibility may be restricted by value visibility settings and
414  /// the visibility of template arguments.
415  VisibilityForValue
416  };
417 
418  /// If visibility was explicitly specified for this
419  /// declaration, return that visibility.
422 
423  /// True if the computed linkage is valid. Used for consistency
424  /// checking. Should always return true.
425  bool isLinkageValid() const;
426 
427  /// True if something has required us to compute the linkage
428  /// of this declaration.
429  ///
430  /// Language features which can retroactively change linkage (like a
431  /// typedef name for linkage purposes) may need to consider this,
432  /// but hopefully only in transitory ways during parsing.
433  bool hasLinkageBeenComputed() const {
434  return hasCachedLinkage();
435  }
436 
437  /// Looks through UsingDecls and ObjCCompatibleAliasDecls for
438  /// the underlying named decl.
440  // Fast-path the common case.
441  if (this->getKind() != UsingShadow &&
442  this->getKind() != ConstructorUsingShadow &&
443  this->getKind() != ObjCCompatibleAlias &&
444  this->getKind() != NamespaceAlias)
445  return this;
446 
447  return getUnderlyingDeclImpl();
448  }
449  const NamedDecl *getUnderlyingDecl() const {
450  return const_cast<NamedDecl*>(this)->getUnderlyingDecl();
451  }
452 
454  return cast<NamedDecl>(static_cast<Decl *>(this)->getMostRecentDecl());
455  }
456  const NamedDecl *getMostRecentDecl() const {
457  return const_cast<NamedDecl*>(this)->getMostRecentDecl();
458  }
459 
460  ObjCStringFormatFamily getObjCFStringFormattingFamily() const;
461 
462  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
463  static bool classofKind(Kind K) { return K >= firstNamed && K <= lastNamed; }
464 };
465 
466 inline raw_ostream &operator<<(raw_ostream &OS, const NamedDecl &ND) {
467  ND.printName(OS);
468  return OS;
469 }
470 
471 /// Represents the declaration of a label. Labels also have a
472 /// corresponding LabelStmt, which indicates the position that the label was
473 /// defined at. For normal labels, the location of the decl is the same as the
474 /// location of the statement. For GNU local labels (__label__), the decl
475 /// location is where the __label__ is.
476 class LabelDecl : public NamedDecl {
477  LabelStmt *TheStmt;
478  StringRef MSAsmName;
479  bool MSAsmNameResolved = false;
480 
481  /// For normal labels, this is the same as the main declaration
482  /// label, i.e., the location of the identifier; for GNU local labels,
483  /// this is the location of the __label__ keyword.
484  SourceLocation LocStart;
485 
487  LabelStmt *S, SourceLocation StartL)
488  : NamedDecl(Label, DC, IdentL, II), TheStmt(S), LocStart(StartL) {}
489 
490  void anchor() override;
491 
492 public:
493  static LabelDecl *Create(ASTContext &C, DeclContext *DC,
494  SourceLocation IdentL, IdentifierInfo *II);
495  static LabelDecl *Create(ASTContext &C, DeclContext *DC,
496  SourceLocation IdentL, IdentifierInfo *II,
497  SourceLocation GnuLabelL);
498  static LabelDecl *CreateDeserialized(ASTContext &C, unsigned ID);
499 
500  LabelStmt *getStmt() const { return TheStmt; }
501  void setStmt(LabelStmt *T) { TheStmt = T; }
502 
503  bool isGnuLocal() const { return LocStart != getLocation(); }
504  void setLocStart(SourceLocation L) { LocStart = L; }
505 
506  SourceRange getSourceRange() const override LLVM_READONLY {
507  return SourceRange(LocStart, getLocation());
508  }
509 
510  bool isMSAsmLabel() const { return !MSAsmName.empty(); }
511  bool isResolvedMSAsmLabel() const { return isMSAsmLabel() && MSAsmNameResolved; }
512  void setMSAsmLabel(StringRef Name);
513  StringRef getMSAsmLabel() const { return MSAsmName; }
514  void setMSAsmLabelResolved() { MSAsmNameResolved = true; }
515 
516  // Implement isa/cast/dyncast/etc.
517  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
518  static bool classofKind(Kind K) { return K == Label; }
519 };
520 
521 /// Represent a C++ namespace.
522 class NamespaceDecl : public NamedDecl, public DeclContext,
523  public Redeclarable<NamespaceDecl>
524 {
525  /// The starting location of the source range, pointing
526  /// to either the namespace or the inline keyword.
527  SourceLocation LocStart;
528 
529  /// The ending location of the source range.
530  SourceLocation RBraceLoc;
531 
532  /// A pointer to either the anonymous namespace that lives just inside
533  /// this namespace or to the first namespace in the chain (the latter case
534  /// only when this is not the first in the chain), along with a
535  /// boolean value indicating whether this is an inline namespace.
536  llvm::PointerIntPair<NamespaceDecl *, 1, bool> AnonOrFirstNamespaceAndInline;
537 
538  NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
539  SourceLocation StartLoc, SourceLocation IdLoc,
540  IdentifierInfo *Id, NamespaceDecl *PrevDecl);
541 
543 
544  NamespaceDecl *getNextRedeclarationImpl() override;
545  NamespaceDecl *getPreviousDeclImpl() override;
546  NamespaceDecl *getMostRecentDeclImpl() override;
547 
548 public:
549  friend class ASTDeclReader;
550  friend class ASTDeclWriter;
551 
552  static NamespaceDecl *Create(ASTContext &C, DeclContext *DC,
553  bool Inline, SourceLocation StartLoc,
554  SourceLocation IdLoc, IdentifierInfo *Id,
555  NamespaceDecl *PrevDecl);
556 
557  static NamespaceDecl *CreateDeserialized(ASTContext &C, unsigned ID);
558 
560  using redecl_iterator = redeclarable_base::redecl_iterator;
561 
562  using redeclarable_base::redecls_begin;
563  using redeclarable_base::redecls_end;
564  using redeclarable_base::redecls;
565  using redeclarable_base::getPreviousDecl;
566  using redeclarable_base::getMostRecentDecl;
567  using redeclarable_base::isFirstDecl;
568 
569  /// Returns true if this is an anonymous namespace declaration.
570  ///
571  /// For example:
572  /// \code
573  /// namespace {
574  /// ...
575  /// };
576  /// \endcode
577  /// q.v. C++ [namespace.unnamed]
578  bool isAnonymousNamespace() const {
579  return !getIdentifier();
580  }
581 
582  /// Returns true if this is an inline namespace declaration.
583  bool isInline() const {
584  return AnonOrFirstNamespaceAndInline.getInt();
585  }
586 
587  /// Set whether this is an inline namespace declaration.
588  void setInline(bool Inline) {
589  AnonOrFirstNamespaceAndInline.setInt(Inline);
590  }
591 
592  /// Get the original (first) namespace declaration.
593  NamespaceDecl *getOriginalNamespace();
594 
595  /// Get the original (first) namespace declaration.
596  const NamespaceDecl *getOriginalNamespace() const;
597 
598  /// Return true if this declaration is an original (first) declaration
599  /// of the namespace. This is false for non-original (subsequent) namespace
600  /// declarations and anonymous namespaces.
601  bool isOriginalNamespace() const;
602 
603  /// Retrieve the anonymous namespace nested inside this namespace,
604  /// if any.
606  return getOriginalNamespace()->AnonOrFirstNamespaceAndInline.getPointer();
607  }
608 
610  getOriginalNamespace()->AnonOrFirstNamespaceAndInline.setPointer(D);
611  }
612 
613  /// Retrieves the canonical declaration of this namespace.
615  return getOriginalNamespace();
616  }
618  return getOriginalNamespace();
619  }
620 
621  SourceRange getSourceRange() const override LLVM_READONLY {
622  return SourceRange(LocStart, RBraceLoc);
623  }
624 
625  SourceLocation getBeginLoc() const LLVM_READONLY { return LocStart; }
626  SourceLocation getRBraceLoc() const { return RBraceLoc; }
627  void setLocStart(SourceLocation L) { LocStart = L; }
628  void setRBraceLoc(SourceLocation L) { RBraceLoc = L; }
629 
630  // Implement isa/cast/dyncast/etc.
631  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
632  static bool classofKind(Kind K) { return K == Namespace; }
634  return static_cast<DeclContext *>(const_cast<NamespaceDecl*>(D));
635  }
637  return static_cast<NamespaceDecl *>(const_cast<DeclContext*>(DC));
638  }
639 };
640 
641 /// Represent the declaration of a variable (in which case it is
642 /// an lvalue) a function (in which case it is a function designator) or
643 /// an enum constant.
644 class ValueDecl : public NamedDecl {
645  QualType DeclType;
646 
647  void anchor() override;
648 
649 protected:
652  : NamedDecl(DK, DC, L, N), DeclType(T) {}
653 
654 public:
655  QualType getType() const { return DeclType; }
656  void setType(QualType newType) { DeclType = newType; }
657 
658  /// Determine whether this symbol is weakly-imported,
659  /// or declared with the weak or weak-ref attr.
660  bool isWeak() const;
661 
662  // Implement isa/cast/dyncast/etc.
663  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
664  static bool classofKind(Kind K) { return K >= firstValue && K <= lastValue; }
665 };
666 
667 /// A struct with extended info about a syntactic
668 /// name qualifier, to be used for the case of out-of-line declarations.
671 
672  /// The number of "outer" template parameter lists.
673  /// The count includes all of the template parameter lists that were matched
674  /// against the template-ids occurring into the NNS and possibly (in the
675  /// case of an explicit specialization) a final "template <>".
676  unsigned NumTemplParamLists = 0;
677 
678  /// A new-allocated array of size NumTemplParamLists,
679  /// containing pointers to the "outer" template parameter lists.
680  /// It includes all of the template parameter lists that were matched
681  /// against the template-ids occurring into the NNS and possibly (in the
682  /// case of an explicit specialization) a final "template <>".
683  TemplateParameterList** TemplParamLists = nullptr;
684 
685  QualifierInfo() = default;
686  QualifierInfo(const QualifierInfo &) = delete;
687  QualifierInfo& operator=(const QualifierInfo &) = delete;
688 
689  /// Sets info about "outer" template parameter lists.
690  void setTemplateParameterListsInfo(ASTContext &Context,
692 };
693 
694 /// Represents a ValueDecl that came out of a declarator.
695 /// Contains type source information through TypeSourceInfo.
696 class DeclaratorDecl : public ValueDecl {
697  // A struct representing both a TInfo and a syntactic qualifier,
698  // to be used for the (uncommon) case of out-of-line declarations.
699  struct ExtInfo : public QualifierInfo {
700  TypeSourceInfo *TInfo;
701  };
702 
703  llvm::PointerUnion<TypeSourceInfo *, ExtInfo *> DeclInfo;
704 
705  /// The start of the source range for this declaration,
706  /// ignoring outer template declarations.
707  SourceLocation InnerLocStart;
708 
709  bool hasExtInfo() const { return DeclInfo.is<ExtInfo*>(); }
710  ExtInfo *getExtInfo() { return DeclInfo.get<ExtInfo*>(); }
711  const ExtInfo *getExtInfo() const { return DeclInfo.get<ExtInfo*>(); }
712 
713 protected:
716  SourceLocation StartL)
717  : ValueDecl(DK, DC, L, N, T), DeclInfo(TInfo), InnerLocStart(StartL) {}
718 
719 public:
720  friend class ASTDeclReader;
721  friend class ASTDeclWriter;
722 
724  return hasExtInfo()
725  ? getExtInfo()->TInfo
726  : DeclInfo.get<TypeSourceInfo*>();
727  }
728 
730  if (hasExtInfo())
731  getExtInfo()->TInfo = TI;
732  else
733  DeclInfo = TI;
734  }
735 
736  /// Return start of source range ignoring outer template declarations.
737  SourceLocation getInnerLocStart() const { return InnerLocStart; }
738  void setInnerLocStart(SourceLocation L) { InnerLocStart = L; }
739 
740  /// Return start of source range taking into account any outer template
741  /// declarations.
742  SourceLocation getOuterLocStart() const;
743 
744  SourceRange getSourceRange() const override LLVM_READONLY;
745 
746  SourceLocation getBeginLoc() const LLVM_READONLY {
747  return getOuterLocStart();
748  }
749 
750  /// Retrieve the nested-name-specifier that qualifies the name of this
751  /// declaration, if it was present in the source.
753  return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier()
754  : nullptr;
755  }
756 
757  /// Retrieve the nested-name-specifier (with source-location
758  /// information) that qualifies the name of this declaration, if it was
759  /// present in the source.
761  return hasExtInfo() ? getExtInfo()->QualifierLoc
763  }
764 
765  void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc);
766 
767  unsigned getNumTemplateParameterLists() const {
768  return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0;
769  }
770 
772  assert(index < getNumTemplateParameterLists());
773  return getExtInfo()->TemplParamLists[index];
774  }
775 
776  void setTemplateParameterListsInfo(ASTContext &Context,
778 
779  SourceLocation getTypeSpecStartLoc() const;
780 
781  // Implement isa/cast/dyncast/etc.
782  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
783  static bool classofKind(Kind K) {
784  return K >= firstDeclarator && K <= lastDeclarator;
785  }
786 };
787 
788 /// Structure used to store a statement, the constant value to
789 /// which it was evaluated (if any), and whether or not the statement
790 /// is an integral constant expression (if known).
792  /// Whether this statement was already evaluated.
793  bool WasEvaluated : 1;
794 
795  /// Whether this statement is being evaluated.
796  bool IsEvaluating : 1;
797 
798  /// Whether we already checked whether this statement was an
799  /// integral constant expression.
800  bool CheckedICE : 1;
801 
802  /// Whether we are checking whether this statement is an
803  /// integral constant expression.
804  bool CheckingICE : 1;
805 
806  /// Whether this statement is an integral constant expression,
807  /// or in C++11, whether the statement is a constant expression. Only
808  /// valid if CheckedICE is true.
809  bool IsICE : 1;
810 
811  /// Whether this variable is known to have constant destruction. That is,
812  /// whether running the destructor on the initial value is a side-effect
813  /// (and doesn't inspect any state that might have changed during program
814  /// execution). This is currently only computed if the destructor is
815  /// non-trivial.
817 
820 
822  : WasEvaluated(false), IsEvaluating(false), CheckedICE(false),
823  CheckingICE(false), IsICE(false), HasConstantDestruction(false) {}
824 };
825 
826 /// Represents a variable declaration or definition.
827 class VarDecl : public DeclaratorDecl, public Redeclarable<VarDecl> {
828 public:
829  /// Initialization styles.
831  /// C-style initialization with assignment
833 
834  /// Call-style initialization (C++98)
836 
837  /// Direct list-initialization (C++11)
839  };
840 
841  /// Kinds of thread-local storage.
842  enum TLSKind {
843  /// Not a TLS variable.
845 
846  /// TLS with a known-constant initializer.
848 
849  /// TLS with a dynamic initializer.
850  TLS_Dynamic
851  };
852 
853  /// Return the string used to specify the storage class \p SC.
854  ///
855  /// It is illegal to call this function with SC == None.
856  static const char *getStorageClassSpecifierString(StorageClass SC);
857 
858 protected:
859  // A pointer union of Stmt * and EvaluatedStmt *. When an EvaluatedStmt, we
860  // have allocated the auxiliary struct of information there.
861  //
862  // TODO: It is a bit unfortunate to use a PointerUnion inside the VarDecl for
863  // this as *many* VarDecls are ParmVarDecls that don't have default
864  // arguments. We could save some space by moving this pointer union to be
865  // allocated in trailing space when necessary.
866  using InitType = llvm::PointerUnion<Stmt *, EvaluatedStmt *>;
867 
868  /// The initializer for this variable or, for a ParmVarDecl, the
869  /// C++ default argument.
870  mutable InitType Init;
871 
872 private:
873  friend class ASTDeclReader;
874  friend class ASTNodeImporter;
875  friend class StmtIteratorBase;
876 
877  class VarDeclBitfields {
878  friend class ASTDeclReader;
879  friend class VarDecl;
880 
881  unsigned SClass : 3;
882  unsigned TSCSpec : 2;
883  unsigned InitStyle : 2;
884 
885  /// Whether this variable is an ARC pseudo-__strong variable; see
886  /// isARCPseudoStrong() for details.
887  unsigned ARCPseudoStrong : 1;
888  };
889  enum { NumVarDeclBits = 8 };
890 
891 protected:
892  enum { NumParameterIndexBits = 8 };
893 
898  DAK_Normal
899  };
900 
902  friend class ASTDeclReader;
903  friend class ParmVarDecl;
904 
905  unsigned : NumVarDeclBits;
906 
907  /// Whether this parameter inherits a default argument from a
908  /// prior declaration.
909  unsigned HasInheritedDefaultArg : 1;
910 
911  /// Describes the kind of default argument for this parameter. By default
912  /// this is none. If this is normal, then the default argument is stored in
913  /// the \c VarDecl initializer expression unless we were unable to parse
914  /// (even an invalid) expression for the default argument.
915  unsigned DefaultArgKind : 2;
916 
917  /// Whether this parameter undergoes K&R argument promotion.
918  unsigned IsKNRPromoted : 1;
919 
920  /// Whether this parameter is an ObjC method parameter or not.
921  unsigned IsObjCMethodParam : 1;
922 
923  /// If IsObjCMethodParam, a Decl::ObjCDeclQualifier.
924  /// Otherwise, the number of function parameter scopes enclosing
925  /// the function parameter scope in which this parameter was
926  /// declared.
927  unsigned ScopeDepthOrObjCQuals : 7;
928 
929  /// The number of parameters preceding this parameter in the
930  /// function parameter scope in which it was declared.
931  unsigned ParameterIndex : NumParameterIndexBits;
932  };
933 
935  friend class ASTDeclReader;
936  friend class ImplicitParamDecl;
937  friend class VarDecl;
938 
939  unsigned : NumVarDeclBits;
940 
941  // FIXME: We need something similar to CXXRecordDecl::DefinitionData.
942  /// Whether this variable is a definition which was demoted due to
943  /// module merge.
944  unsigned IsThisDeclarationADemotedDefinition : 1;
945 
946  /// Whether this variable is the exception variable in a C++ catch
947  /// or an Objective-C @catch statement.
948  unsigned ExceptionVar : 1;
949 
950  /// Whether this local variable could be allocated in the return
951  /// slot of its function, enabling the named return value optimization
952  /// (NRVO).
953  unsigned NRVOVariable : 1;
954 
955  /// Whether this variable is the for-range-declaration in a C++0x
956  /// for-range statement.
957  unsigned CXXForRangeDecl : 1;
958 
959  /// Whether this variable is the for-in loop declaration in Objective-C.
960  unsigned ObjCForDecl : 1;
961 
962  /// Whether this variable is (C++1z) inline.
963  unsigned IsInline : 1;
964 
965  /// Whether this variable has (C++1z) inline explicitly specified.
966  unsigned IsInlineSpecified : 1;
967 
968  /// Whether this variable is (C++0x) constexpr.
969  unsigned IsConstexpr : 1;
970 
971  /// Whether this variable is the implicit variable for a lambda
972  /// init-capture.
973  unsigned IsInitCapture : 1;
974 
975  /// Whether this local extern variable's previous declaration was
976  /// declared in the same block scope. This controls whether we should merge
977  /// the type of this declaration with its previous declaration.
978  unsigned PreviousDeclInSameBlockScope : 1;
979 
980  /// Defines kind of the ImplicitParamDecl: 'this', 'self', 'vtt', '_cmd' or
981  /// something else.
982  unsigned ImplicitParamKind : 3;
983 
984  unsigned EscapingByref : 1;
985  };
986 
987  union {
988  unsigned AllBits;
989  VarDeclBitfields VarDeclBits;
992  };
993 
994  VarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
996  TypeSourceInfo *TInfo, StorageClass SC);
997 
999 
1001  return getNextRedeclaration();
1002  }
1003 
1005  return getPreviousDecl();
1006  }
1007 
1009  return getMostRecentDecl();
1010  }
1011 
1012 public:
1014  using redecl_iterator = redeclarable_base::redecl_iterator;
1015 
1016  using redeclarable_base::redecls_begin;
1017  using redeclarable_base::redecls_end;
1018  using redeclarable_base::redecls;
1019  using redeclarable_base::getPreviousDecl;
1020  using redeclarable_base::getMostRecentDecl;
1021  using redeclarable_base::isFirstDecl;
1022 
1023  static VarDecl *Create(ASTContext &C, DeclContext *DC,
1024  SourceLocation StartLoc, SourceLocation IdLoc,
1026  StorageClass S);
1027 
1028  static VarDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1029 
1030  SourceRange getSourceRange() const override LLVM_READONLY;
1031 
1032  /// Returns the storage class as written in the source. For the
1033  /// computed linkage of symbol, see getLinkage.
1035  return (StorageClass) VarDeclBits.SClass;
1036  }
1037  void setStorageClass(StorageClass SC);
1038 
1040  VarDeclBits.TSCSpec = TSC;
1041  assert(VarDeclBits.TSCSpec == TSC && "truncation");
1042  }
1044  return static_cast<ThreadStorageClassSpecifier>(VarDeclBits.TSCSpec);
1045  }
1046  TLSKind getTLSKind() const;
1047 
1048  /// Returns true if a variable with function scope is a non-static local
1049  /// variable.
1050  bool hasLocalStorage() const {
1051  if (getStorageClass() == SC_None) {
1052  // OpenCL v1.2 s6.5.3: The __constant or constant address space name is
1053  // used to describe variables allocated in global memory and which are
1054  // accessed inside a kernel(s) as read-only variables. As such, variables
1055  // in constant address space cannot have local storage.
1056  if (getType().getAddressSpace() == LangAS::opencl_constant)
1057  return false;
1058  // Second check is for C++11 [dcl.stc]p4.
1059  return !isFileVarDecl() && getTSCSpec() == TSCS_unspecified;
1060  }
1061 
1062  // Global Named Register (GNU extension)
1063  if (getStorageClass() == SC_Register && !isLocalVarDeclOrParm())
1064  return false;
1065 
1066  // Return true for: Auto, Register.
1067  // Return false for: Extern, Static, PrivateExtern, OpenCLWorkGroupLocal.
1068 
1069  return getStorageClass() >= SC_Auto;
1070  }
1071 
1072  /// Returns true if a variable with function scope is a static local
1073  /// variable.
1074  bool isStaticLocal() const {
1075  return (getStorageClass() == SC_Static ||
1076  // C++11 [dcl.stc]p4
1077  (getStorageClass() == SC_None && getTSCSpec() == TSCS_thread_local))
1078  && !isFileVarDecl();
1079  }
1080 
1081  /// Returns true if a variable has extern or __private_extern__
1082  /// storage.
1083  bool hasExternalStorage() const {
1084  return getStorageClass() == SC_Extern ||
1086  }
1087 
1088  /// Returns true for all variables that do not have local storage.
1089  ///
1090  /// This includes all global variables as well as static variables declared
1091  /// within a function.
1092  bool hasGlobalStorage() const { return !hasLocalStorage(); }
1093 
1094  /// Get the storage duration of this variable, per C++ [basic.stc].
1096  return hasLocalStorage() ? SD_Automatic :
1097  getTSCSpec() ? SD_Thread : SD_Static;
1098  }
1099 
1100  /// Compute the language linkage.
1101  LanguageLinkage getLanguageLinkage() const;
1102 
1103  /// Determines whether this variable is a variable with external, C linkage.
1104  bool isExternC() const;
1105 
1106  /// Determines whether this variable's context is, or is nested within,
1107  /// a C++ extern "C" linkage spec.
1108  bool isInExternCContext() const;
1109 
1110  /// Determines whether this variable's context is, or is nested within,
1111  /// a C++ extern "C++" linkage spec.
1112  bool isInExternCXXContext() const;
1113 
1114  /// Returns true for local variable declarations other than parameters.
1115  /// Note that this includes static variables inside of functions. It also
1116  /// includes variables inside blocks.
1117  ///
1118  /// void foo() { int x; static int y; extern int z; }
1119  bool isLocalVarDecl() const {
1120  if (getKind() != Decl::Var && getKind() != Decl::Decomposition)
1121  return false;
1122  if (const DeclContext *DC = getLexicalDeclContext())
1123  return DC->getRedeclContext()->isFunctionOrMethod();
1124  return false;
1125  }
1126 
1127  /// Similar to isLocalVarDecl but also includes parameters.
1128  bool isLocalVarDeclOrParm() const {
1129  return isLocalVarDecl() || getKind() == Decl::ParmVar;
1130  }
1131 
1132  /// Similar to isLocalVarDecl, but excludes variables declared in blocks.
1134  if (getKind() != Decl::Var && getKind() != Decl::Decomposition)
1135  return false;
1136  const DeclContext *DC = getLexicalDeclContext()->getRedeclContext();
1137  return DC->isFunctionOrMethod() && DC->getDeclKind() != Decl::Block;
1138  }
1139 
1140  /// Determines whether this is a static data member.
1141  ///
1142  /// This will only be true in C++, and applies to, e.g., the
1143  /// variable 'x' in:
1144  /// \code
1145  /// struct S {
1146  /// static int x;
1147  /// };
1148  /// \endcode
1149  bool isStaticDataMember() const {
1150  // If it wasn't static, it would be a FieldDecl.
1151  return getKind() != Decl::ParmVar && getDeclContext()->isRecord();
1152  }
1153 
1154  VarDecl *getCanonicalDecl() override;
1155  const VarDecl *getCanonicalDecl() const {
1156  return const_cast<VarDecl*>(this)->getCanonicalDecl();
1157  }
1158 
1160  /// This declaration is only a declaration.
1162 
1163  /// This declaration is a tentative definition.
1165 
1166  /// This declaration is definitely a definition.
1167  Definition
1168  };
1169 
1170  /// Check whether this declaration is a definition. If this could be
1171  /// a tentative definition (in C), don't check whether there's an overriding
1172  /// definition.
1173  DefinitionKind isThisDeclarationADefinition(ASTContext &) const;
1175  return isThisDeclarationADefinition(getASTContext());
1176  }
1177 
1178  /// Check whether this variable is defined in this translation unit.
1181  return hasDefinition(getASTContext());
1182  }
1183 
1184  /// Get the tentative definition that acts as the real definition in a TU.
1185  /// Returns null if there is a proper definition available.
1186  VarDecl *getActingDefinition();
1187  const VarDecl *getActingDefinition() const {
1188  return const_cast<VarDecl*>(this)->getActingDefinition();
1189  }
1190 
1191  /// Get the real (not just tentative) definition for this declaration.
1194  return const_cast<VarDecl*>(this)->getDefinition(C);
1195  }
1197  return getDefinition(getASTContext());
1198  }
1199  const VarDecl *getDefinition() const {
1200  return const_cast<VarDecl*>(this)->getDefinition();
1201  }
1202 
1203  /// Determine whether this is or was instantiated from an out-of-line
1204  /// definition of a static data member.
1205  bool isOutOfLine() const override;
1206 
1207  /// Returns true for file scoped variable declaration.
1208  bool isFileVarDecl() const {
1209  Kind K = getKind();
1210  if (K == ParmVar || K == ImplicitParam)
1211  return false;
1212 
1213  if (getLexicalDeclContext()->getRedeclContext()->isFileContext())
1214  return true;
1215 
1216  if (isStaticDataMember())
1217  return true;
1218 
1219  return false;
1220  }
1221 
1222  /// Get the initializer for this variable, no matter which
1223  /// declaration it is attached to.
1224  const Expr *getAnyInitializer() const {
1225  const VarDecl *D;
1226  return getAnyInitializer(D);
1227  }
1228 
1229  /// Get the initializer for this variable, no matter which
1230  /// declaration it is attached to. Also get that declaration.
1231  const Expr *getAnyInitializer(const VarDecl *&D) const;
1232 
1233  bool hasInit() const;
1234  const Expr *getInit() const {
1235  return const_cast<VarDecl *>(this)->getInit();
1236  }
1237  Expr *getInit();
1238 
1239  /// Retrieve the address of the initializer expression.
1240  Stmt **getInitAddress();
1241 
1242  void setInit(Expr *I);
1243 
1244  /// Get the initializing declaration of this variable, if any. This is
1245  /// usually the definition, except that for a static data member it can be
1246  /// the in-class declaration.
1247  VarDecl *getInitializingDeclaration();
1249  return const_cast<VarDecl *>(this)->getInitializingDeclaration();
1250  }
1251 
1252  /// Determine whether this variable's value might be usable in a
1253  /// constant expression, according to the relevant language standard.
1254  /// This only checks properties of the declaration, and does not check
1255  /// whether the initializer is in fact a constant expression.
1256  bool mightBeUsableInConstantExpressions(ASTContext &C) const;
1257 
1258  /// Determine whether this variable's value can be used in a
1259  /// constant expression, according to the relevant language standard,
1260  /// including checking whether it was initialized by a constant expression.
1261  bool isUsableInConstantExpressions(ASTContext &C) const;
1262 
1263  EvaluatedStmt *ensureEvaluatedStmt() const;
1264 
1265  /// Attempt to evaluate the value of the initializer attached to this
1266  /// declaration, and produce notes explaining why it cannot be evaluated or is
1267  /// not a constant expression. Returns a pointer to the value if evaluation
1268  /// succeeded, 0 otherwise.
1269  APValue *evaluateValue() const;
1270  APValue *evaluateValue(SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
1271 
1272  /// Return the already-evaluated value of this variable's
1273  /// initializer, or NULL if the value is not yet known. Returns pointer
1274  /// to untyped APValue if the value could not be evaluated.
1275  APValue *getEvaluatedValue() const;
1276 
1277  /// Evaluate the destruction of this variable to determine if it constitutes
1278  /// constant destruction.
1279  ///
1280  /// \pre isInitICE()
1281  /// \return \c true if this variable has constant destruction, \c false if
1282  /// not.
1283  bool evaluateDestruction(SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
1284 
1285  /// Determines whether it is already known whether the
1286  /// initializer is an integral constant expression or not.
1287  bool isInitKnownICE() const;
1288 
1289  /// Determines whether the initializer is an integral constant
1290  /// expression, or in C++11, whether the initializer is a constant
1291  /// expression.
1292  ///
1293  /// \pre isInitKnownICE()
1294  bool isInitICE() const;
1295 
1296  /// Determine whether the value of the initializer attached to this
1297  /// declaration is an integral constant expression.
1298  bool checkInitIsICE() const;
1299 
1301  VarDeclBits.InitStyle = Style;
1302  }
1303 
1304  /// The style of initialization for this declaration.
1305  ///
1306  /// C-style initialization is "int x = 1;". Call-style initialization is
1307  /// a C++98 direct-initializer, e.g. "int x(1);". The Init expression will be
1308  /// the expression inside the parens or a "ClassType(a,b,c)" class constructor
1309  /// expression for class types. List-style initialization is C++11 syntax,
1310  /// e.g. "int x{1};". Clients can distinguish between different forms of
1311  /// initialization by checking this value. In particular, "int x = {1};" is
1312  /// C-style, "int x({1})" is call-style, and "int x{1};" is list-style; the
1313  /// Init expression in all three cases is an InitListExpr.
1315  return static_cast<InitializationStyle>(VarDeclBits.InitStyle);
1316  }
1317 
1318  /// Whether the initializer is a direct-initializer (list or call).
1319  bool isDirectInit() const {
1320  return getInitStyle() != CInit;
1321  }
1322 
1323  /// If this definition should pretend to be a declaration.
1325  return isa<ParmVarDecl>(this) ? false :
1326  NonParmVarDeclBits.IsThisDeclarationADemotedDefinition;
1327  }
1328 
1329  /// This is a definition which should be demoted to a declaration.
1330  ///
1331  /// In some cases (mostly module merging) we can end up with two visible
1332  /// definitions one of which needs to be demoted to a declaration to keep
1333  /// the AST invariants.
1335  assert(isThisDeclarationADefinition() && "Not a definition!");
1336  assert(!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!");
1337  NonParmVarDeclBits.IsThisDeclarationADemotedDefinition = 1;
1338  }
1339 
1340  /// Determine whether this variable is the exception variable in a
1341  /// C++ catch statememt or an Objective-C \@catch statement.
1342  bool isExceptionVariable() const {
1343  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.ExceptionVar;
1344  }
1345  void setExceptionVariable(bool EV) {
1346  assert(!isa<ParmVarDecl>(this));
1347  NonParmVarDeclBits.ExceptionVar = EV;
1348  }
1349 
1350  /// Determine whether this local variable can be used with the named
1351  /// return value optimization (NRVO).
1352  ///
1353  /// The named return value optimization (NRVO) works by marking certain
1354  /// non-volatile local variables of class type as NRVO objects. These
1355  /// locals can be allocated within the return slot of their containing
1356  /// function, in which case there is no need to copy the object to the
1357  /// return slot when returning from the function. Within the function body,
1358  /// each return that returns the NRVO object will have this variable as its
1359  /// NRVO candidate.
1360  bool isNRVOVariable() const {
1361  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.NRVOVariable;
1362  }
1363  void setNRVOVariable(bool NRVO) {
1364  assert(!isa<ParmVarDecl>(this));
1365  NonParmVarDeclBits.NRVOVariable = NRVO;
1366  }
1367 
1368  /// Determine whether this variable is the for-range-declaration in
1369  /// a C++0x for-range statement.
1370  bool isCXXForRangeDecl() const {
1371  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.CXXForRangeDecl;
1372  }
1373  void setCXXForRangeDecl(bool FRD) {
1374  assert(!isa<ParmVarDecl>(this));
1375  NonParmVarDeclBits.CXXForRangeDecl = FRD;
1376  }
1377 
1378  /// Determine whether this variable is a for-loop declaration for a
1379  /// for-in statement in Objective-C.
1380  bool isObjCForDecl() const {
1381  return NonParmVarDeclBits.ObjCForDecl;
1382  }
1383 
1384  void setObjCForDecl(bool FRD) {
1385  NonParmVarDeclBits.ObjCForDecl = FRD;
1386  }
1387 
1388  /// Determine whether this variable is an ARC pseudo-__strong variable. A
1389  /// pseudo-__strong variable has a __strong-qualified type but does not
1390  /// actually retain the object written into it. Generally such variables are
1391  /// also 'const' for safety. There are 3 cases where this will be set, 1) if
1392  /// the variable is annotated with the objc_externally_retained attribute, 2)
1393  /// if its 'self' in a non-init method, or 3) if its the variable in an for-in
1394  /// loop.
1395  bool isARCPseudoStrong() const { return VarDeclBits.ARCPseudoStrong; }
1396  void setARCPseudoStrong(bool PS) { VarDeclBits.ARCPseudoStrong = PS; }
1397 
1398  /// Whether this variable is (C++1z) inline.
1399  bool isInline() const {
1400  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInline;
1401  }
1402  bool isInlineSpecified() const {
1403  return isa<ParmVarDecl>(this) ? false
1404  : NonParmVarDeclBits.IsInlineSpecified;
1405  }
1407  assert(!isa<ParmVarDecl>(this));
1408  NonParmVarDeclBits.IsInline = true;
1409  NonParmVarDeclBits.IsInlineSpecified = true;
1410  }
1412  assert(!isa<ParmVarDecl>(this));
1413  NonParmVarDeclBits.IsInline = true;
1414  }
1415 
1416  /// Whether this variable is (C++11) constexpr.
1417  bool isConstexpr() const {
1418  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsConstexpr;
1419  }
1420  void setConstexpr(bool IC) {
1421  assert(!isa<ParmVarDecl>(this));
1422  NonParmVarDeclBits.IsConstexpr = IC;
1423  }
1424 
1425  /// Whether this variable is the implicit variable for a lambda init-capture.
1426  bool isInitCapture() const {
1427  return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInitCapture;
1428  }
1429  void setInitCapture(bool IC) {
1430  assert(!isa<ParmVarDecl>(this));
1431  NonParmVarDeclBits.IsInitCapture = IC;
1432  }
1433 
1434  /// Determine whether this variable is actually a function parameter pack or
1435  /// init-capture pack.
1436  bool isParameterPack() const;
1437 
1438  /// Whether this local extern variable declaration's previous declaration
1439  /// was declared in the same block scope. Only correct in C++.
1441  return isa<ParmVarDecl>(this)
1442  ? false
1443  : NonParmVarDeclBits.PreviousDeclInSameBlockScope;
1444  }
1446  assert(!isa<ParmVarDecl>(this));
1447  NonParmVarDeclBits.PreviousDeclInSameBlockScope = Same;
1448  }
1449 
1450  /// Indicates the capture is a __block variable that is captured by a block
1451  /// that can potentially escape (a block for which BlockDecl::doesNotEscape
1452  /// returns false).
1453  bool isEscapingByref() const;
1454 
1455  /// Indicates the capture is a __block variable that is never captured by an
1456  /// escaping block.
1457  bool isNonEscapingByref() const;
1458 
1460  NonParmVarDeclBits.EscapingByref = true;
1461  }
1462 
1463  /// Retrieve the variable declaration from which this variable could
1464  /// be instantiated, if it is an instantiation (rather than a non-template).
1465  VarDecl *getTemplateInstantiationPattern() const;
1466 
1467  /// If this variable is an instantiated static data member of a
1468  /// class template specialization, returns the templated static data member
1469  /// from which it was instantiated.
1470  VarDecl *getInstantiatedFromStaticDataMember() const;
1471 
1472  /// If this variable is an instantiation of a variable template or a
1473  /// static data member of a class template, determine what kind of
1474  /// template specialization or instantiation this is.
1476 
1477  /// Get the template specialization kind of this variable for the purposes of
1478  /// template instantiation. This differs from getTemplateSpecializationKind()
1479  /// for an instantiation of a class-scope explicit specialization.
1481  getTemplateSpecializationKindForInstantiation() const;
1482 
1483  /// If this variable is an instantiation of a variable template or a
1484  /// static data member of a class template, determine its point of
1485  /// instantiation.
1486  SourceLocation getPointOfInstantiation() const;
1487 
1488  /// If this variable is an instantiation of a static data member of a
1489  /// class template specialization, retrieves the member specialization
1490  /// information.
1491  MemberSpecializationInfo *getMemberSpecializationInfo() const;
1492 
1493  /// For a static data member that was instantiated from a static
1494  /// data member of a class template, set the template specialiation kind.
1495  void setTemplateSpecializationKind(TemplateSpecializationKind TSK,
1496  SourceLocation PointOfInstantiation = SourceLocation());
1497 
1498  /// Specify that this variable is an instantiation of the
1499  /// static data member VD.
1500  void setInstantiationOfStaticDataMember(VarDecl *VD,
1502 
1503  /// Retrieves the variable template that is described by this
1504  /// variable declaration.
1505  ///
1506  /// Every variable template is represented as a VarTemplateDecl and a
1507  /// VarDecl. The former contains template properties (such as
1508  /// the template parameter lists) while the latter contains the
1509  /// actual description of the template's
1510  /// contents. VarTemplateDecl::getTemplatedDecl() retrieves the
1511  /// VarDecl that from a VarTemplateDecl, while
1512  /// getDescribedVarTemplate() retrieves the VarTemplateDecl from
1513  /// a VarDecl.
1514  VarTemplateDecl *getDescribedVarTemplate() const;
1515 
1516  void setDescribedVarTemplate(VarTemplateDecl *Template);
1517 
1518  // Is this variable known to have a definition somewhere in the complete
1519  // program? This may be true even if the declaration has internal linkage and
1520  // has no definition within this source file.
1521  bool isKnownToBeDefined() const;
1522 
1523  /// Is destruction of this variable entirely suppressed? If so, the variable
1524  /// need not have a usable destructor at all.
1525  bool isNoDestroy(const ASTContext &) const;
1526 
1527  /// Do we need to emit an exit-time destructor for this variable, and if so,
1528  /// what kind?
1529  QualType::DestructionKind needsDestruction(const ASTContext &Ctx) const;
1530 
1531  // Implement isa/cast/dyncast/etc.
1532  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1533  static bool classofKind(Kind K) { return K >= firstVar && K <= lastVar; }
1534 };
1535 
1536 class ImplicitParamDecl : public VarDecl {
1537  void anchor() override;
1538 
1539 public:
1540  /// Defines the kind of the implicit parameter: is this an implicit parameter
1541  /// with pointer to 'this', 'self', '_cmd', virtual table pointers, captured
1542  /// context or something else.
1543  enum ImplicitParamKind : unsigned {
1544  /// Parameter for Objective-C 'self' argument
1546 
1547  /// Parameter for Objective-C '_cmd' argument
1549 
1550  /// Parameter for C++ 'this' argument
1552 
1553  /// Parameter for C++ virtual table pointers
1555 
1556  /// Parameter for captured context
1558 
1559  /// Other implicit parameter
1561  };
1562 
1563  /// Create implicit parameter.
1566  QualType T, ImplicitParamKind ParamKind);
1568  ImplicitParamKind ParamKind);
1569 
1570  static ImplicitParamDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1571 
1574  ImplicitParamKind ParamKind)
1575  : VarDecl(ImplicitParam, C, DC, IdLoc, IdLoc, Id, Type,
1576  /*TInfo=*/nullptr, SC_None) {
1577  NonParmVarDeclBits.ImplicitParamKind = ParamKind;
1578  setImplicit();
1579  }
1580 
1582  : VarDecl(ImplicitParam, C, /*DC=*/nullptr, SourceLocation(),
1583  SourceLocation(), /*Id=*/nullptr, Type,
1584  /*TInfo=*/nullptr, SC_None) {
1585  NonParmVarDeclBits.ImplicitParamKind = ParamKind;
1586  setImplicit();
1587  }
1588 
1589  /// Returns the implicit parameter kind.
1591  return static_cast<ImplicitParamKind>(NonParmVarDeclBits.ImplicitParamKind);
1592  }
1593 
1594  // Implement isa/cast/dyncast/etc.
1595  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1596  static bool classofKind(Kind K) { return K == ImplicitParam; }
1597 };
1598 
1599 /// Represents a parameter to a function.
1600 class ParmVarDecl : public VarDecl {
1601 public:
1602  enum { MaxFunctionScopeDepth = 255 };
1603  enum { MaxFunctionScopeIndex = 255 };
1604 
1605 protected:
1608  TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
1609  : VarDecl(DK, C, DC, StartLoc, IdLoc, Id, T, TInfo, S) {
1610  assert(ParmVarDeclBits.HasInheritedDefaultArg == false);
1611  assert(ParmVarDeclBits.DefaultArgKind == DAK_None);
1612  assert(ParmVarDeclBits.IsKNRPromoted == false);
1613  assert(ParmVarDeclBits.IsObjCMethodParam == false);
1614  setDefaultArg(DefArg);
1615  }
1616 
1617 public:
1618  static ParmVarDecl *Create(ASTContext &C, DeclContext *DC,
1619  SourceLocation StartLoc,
1621  QualType T, TypeSourceInfo *TInfo,
1622  StorageClass S, Expr *DefArg);
1623 
1624  static ParmVarDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1625 
1626  SourceRange getSourceRange() const override LLVM_READONLY;
1627 
1628  void setObjCMethodScopeInfo(unsigned parameterIndex) {
1629  ParmVarDeclBits.IsObjCMethodParam = true;
1630  setParameterIndex(parameterIndex);
1631  }
1632 
1633  void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex) {
1634  assert(!ParmVarDeclBits.IsObjCMethodParam);
1635 
1636  ParmVarDeclBits.ScopeDepthOrObjCQuals = scopeDepth;
1637  assert(ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth
1638  && "truncation!");
1639 
1640  setParameterIndex(parameterIndex);
1641  }
1642 
1643  bool isObjCMethodParameter() const {
1644  return ParmVarDeclBits.IsObjCMethodParam;
1645  }
1646 
1647  unsigned getFunctionScopeDepth() const {
1648  if (ParmVarDeclBits.IsObjCMethodParam) return 0;
1649  return ParmVarDeclBits.ScopeDepthOrObjCQuals;
1650  }
1651 
1652  /// Returns the index of this parameter in its prototype or method scope.
1653  unsigned getFunctionScopeIndex() const {
1654  return getParameterIndex();
1655  }
1656 
1658  if (!ParmVarDeclBits.IsObjCMethodParam) return OBJC_TQ_None;
1659  return ObjCDeclQualifier(ParmVarDeclBits.ScopeDepthOrObjCQuals);
1660  }
1662  assert(ParmVarDeclBits.IsObjCMethodParam);
1663  ParmVarDeclBits.ScopeDepthOrObjCQuals = QTVal;
1664  }
1665 
1666  /// True if the value passed to this parameter must undergo
1667  /// K&R-style default argument promotion:
1668  ///
1669  /// C99 6.5.2.2.
1670  /// If the expression that denotes the called function has a type
1671  /// that does not include a prototype, the integer promotions are
1672  /// performed on each argument, and arguments that have type float
1673  /// are promoted to double.
1674  bool isKNRPromoted() const {
1675  return ParmVarDeclBits.IsKNRPromoted;
1676  }
1677  void setKNRPromoted(bool promoted) {
1678  ParmVarDeclBits.IsKNRPromoted = promoted;
1679  }
1680 
1681  Expr *getDefaultArg();
1682  const Expr *getDefaultArg() const {
1683  return const_cast<ParmVarDecl *>(this)->getDefaultArg();
1684  }
1685 
1686  void setDefaultArg(Expr *defarg);
1687 
1688  /// Retrieve the source range that covers the entire default
1689  /// argument.
1690  SourceRange getDefaultArgRange() const;
1691  void setUninstantiatedDefaultArg(Expr *arg);
1692  Expr *getUninstantiatedDefaultArg();
1694  return const_cast<ParmVarDecl *>(this)->getUninstantiatedDefaultArg();
1695  }
1696 
1697  /// Determines whether this parameter has a default argument,
1698  /// either parsed or not.
1699  bool hasDefaultArg() const;
1700 
1701  /// Determines whether this parameter has a default argument that has not
1702  /// yet been parsed. This will occur during the processing of a C++ class
1703  /// whose member functions have default arguments, e.g.,
1704  /// @code
1705  /// class X {
1706  /// public:
1707  /// void f(int x = 17); // x has an unparsed default argument now
1708  /// }; // x has a regular default argument now
1709  /// @endcode
1710  bool hasUnparsedDefaultArg() const {
1711  return ParmVarDeclBits.DefaultArgKind == DAK_Unparsed;
1712  }
1713 
1715  return ParmVarDeclBits.DefaultArgKind == DAK_Uninstantiated;
1716  }
1717 
1718  /// Specify that this parameter has an unparsed default argument.
1719  /// The argument will be replaced with a real default argument via
1720  /// setDefaultArg when the class definition enclosing the function
1721  /// declaration that owns this default argument is completed.
1723  ParmVarDeclBits.DefaultArgKind = DAK_Unparsed;
1724  }
1725 
1726  bool hasInheritedDefaultArg() const {
1727  return ParmVarDeclBits.HasInheritedDefaultArg;
1728  }
1729 
1730  void setHasInheritedDefaultArg(bool I = true) {
1731  ParmVarDeclBits.HasInheritedDefaultArg = I;
1732  }
1733 
1734  QualType getOriginalType() const;
1735 
1736  /// Sets the function declaration that owns this
1737  /// ParmVarDecl. Since ParmVarDecls are often created before the
1738  /// FunctionDecls that own them, this routine is required to update
1739  /// the DeclContext appropriately.
1740  void setOwningFunction(DeclContext *FD) { setDeclContext(FD); }
1741 
1742  // Implement isa/cast/dyncast/etc.
1743  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1744  static bool classofKind(Kind K) { return K == ParmVar; }
1745 
1746 private:
1747  enum { ParameterIndexSentinel = (1 << NumParameterIndexBits) - 1 };
1748 
1749  void setParameterIndex(unsigned parameterIndex) {
1750  if (parameterIndex >= ParameterIndexSentinel) {
1751  setParameterIndexLarge(parameterIndex);
1752  return;
1753  }
1754 
1755  ParmVarDeclBits.ParameterIndex = parameterIndex;
1756  assert(ParmVarDeclBits.ParameterIndex == parameterIndex && "truncation!");
1757  }
1758  unsigned getParameterIndex() const {
1759  unsigned d = ParmVarDeclBits.ParameterIndex;
1760  return d == ParameterIndexSentinel ? getParameterIndexLarge() : d;
1761  }
1762 
1763  void setParameterIndexLarge(unsigned parameterIndex);
1764  unsigned getParameterIndexLarge() const;
1765 };
1766 
1767 enum class MultiVersionKind {
1768  None,
1769  Target,
1770  CPUSpecific,
1771  CPUDispatch
1772 };
1773 
1774 /// Represents a function declaration or definition.
1775 ///
1776 /// Since a given function can be declared several times in a program,
1777 /// there may be several FunctionDecls that correspond to that
1778 /// function. Only one of those FunctionDecls will be found when
1779 /// traversing the list of declarations in the context of the
1780 /// FunctionDecl (e.g., the translation unit); this FunctionDecl
1781 /// contains all of the information known about the function. Other,
1782 /// previous declarations of the function are available via the
1783 /// getPreviousDecl() chain.
1785  public DeclContext,
1786  public Redeclarable<FunctionDecl> {
1787  // This class stores some data in DeclContext::FunctionDeclBits
1788  // to save some space. Use the provided accessors to access it.
1789 public:
1790  /// The kind of templated function a FunctionDecl can be.
1792  // Not templated.
1794  // The pattern in a function template declaration.
1796  // A non-template function that is an instantiation or explicit
1797  // specialization of a member of a templated class.
1799  // An instantiation or explicit specialization of a function template.
1800  // Note: this might have been instantiated from a templated class if it
1801  // is a class-scope explicit specialization.
1803  // A function template specialization that hasn't yet been resolved to a
1804  // particular specialized function template.
1805  TK_DependentFunctionTemplateSpecialization
1806  };
1807 
1808 private:
1809  /// A new[]'d array of pointers to VarDecls for the formal
1810  /// parameters of this function. This is null if a prototype or if there are
1811  /// no formals.
1812  ParmVarDecl **ParamInfo = nullptr;
1813 
1814  LazyDeclStmtPtr Body;
1815 
1816  unsigned ODRHash;
1817 
1818  /// End part of this FunctionDecl's source range.
1819  ///
1820  /// We could compute the full range in getSourceRange(). However, when we're
1821  /// dealing with a function definition deserialized from a PCH/AST file,
1822  /// we can only compute the full range once the function body has been
1823  /// de-serialized, so it's far better to have the (sometimes-redundant)
1824  /// EndRangeLoc.
1825  SourceLocation EndRangeLoc;
1826 
1827  /// The template or declaration that this declaration
1828  /// describes or was instantiated from, respectively.
1829  ///
1830  /// For non-templates, this value will be NULL. For function
1831  /// declarations that describe a function template, this will be a
1832  /// pointer to a FunctionTemplateDecl. For member functions
1833  /// of class template specializations, this will be a MemberSpecializationInfo
1834  /// pointer containing information about the specialization.
1835  /// For function template specializations, this will be a
1836  /// FunctionTemplateSpecializationInfo, which contains information about
1837  /// the template being specialized and the template arguments involved in
1838  /// that specialization.
1839  llvm::PointerUnion4<FunctionTemplateDecl *,
1843  TemplateOrSpecialization;
1844 
1845  /// Provides source/type location info for the declaration name embedded in
1846  /// the DeclaratorDecl base class.
1847  DeclarationNameLoc DNLoc;
1848 
1849  /// Specify that this function declaration is actually a function
1850  /// template specialization.
1851  ///
1852  /// \param C the ASTContext.
1853  ///
1854  /// \param Template the function template that this function template
1855  /// specialization specializes.
1856  ///
1857  /// \param TemplateArgs the template arguments that produced this
1858  /// function template specialization from the template.
1859  ///
1860  /// \param InsertPos If non-NULL, the position in the function template
1861  /// specialization set where the function template specialization data will
1862  /// be inserted.
1863  ///
1864  /// \param TSK the kind of template specialization this is.
1865  ///
1866  /// \param TemplateArgsAsWritten location info of template arguments.
1867  ///
1868  /// \param PointOfInstantiation point at which the function template
1869  /// specialization was first instantiated.
1870  void setFunctionTemplateSpecialization(ASTContext &C,
1871  FunctionTemplateDecl *Template,
1872  const TemplateArgumentList *TemplateArgs,
1873  void *InsertPos,
1875  const TemplateArgumentListInfo *TemplateArgsAsWritten,
1876  SourceLocation PointOfInstantiation);
1877 
1878  /// Specify that this record is an instantiation of the
1879  /// member function FD.
1880  void setInstantiationOfMemberFunction(ASTContext &C, FunctionDecl *FD,
1882 
1883  void setParams(ASTContext &C, ArrayRef<ParmVarDecl *> NewParamInfo);
1884 
1885  // This is unfortunately needed because ASTDeclWriter::VisitFunctionDecl
1886  // need to access this bit but we want to avoid making ASTDeclWriter
1887  // a friend of FunctionDeclBitfields just for this.
1888  bool isDeletedBit() const { return FunctionDeclBits.IsDeleted; }
1889 
1890  /// Whether an ODRHash has been stored.
1891  bool hasODRHash() const { return FunctionDeclBits.HasODRHash; }
1892 
1893  /// State that an ODRHash has been stored.
1894  void setHasODRHash(bool B = true) { FunctionDeclBits.HasODRHash = B; }
1895 
1896 protected:
1898  const DeclarationNameInfo &NameInfo, QualType T,
1899  TypeSourceInfo *TInfo, StorageClass S, bool isInlineSpecified,
1900  ConstexprSpecKind ConstexprKind);
1901 
1903 
1905  return getNextRedeclaration();
1906  }
1907 
1909  return getPreviousDecl();
1910  }
1911 
1913  return getMostRecentDecl();
1914  }
1915 
1916 public:
1917  friend class ASTDeclReader;
1918  friend class ASTDeclWriter;
1919 
1921  using redecl_iterator = redeclarable_base::redecl_iterator;
1922 
1923  using redeclarable_base::redecls_begin;
1924  using redeclarable_base::redecls_end;
1925  using redeclarable_base::redecls;
1926  using redeclarable_base::getPreviousDecl;
1927  using redeclarable_base::getMostRecentDecl;
1928  using redeclarable_base::isFirstDecl;
1929 
1930  static FunctionDecl *
1933  TypeSourceInfo *TInfo, StorageClass SC, bool isInlineSpecified = false,
1934  bool hasWrittenPrototype = true,
1935  ConstexprSpecKind ConstexprKind = CSK_unspecified) {
1936  DeclarationNameInfo NameInfo(N, NLoc);
1937  return FunctionDecl::Create(C, DC, StartLoc, NameInfo, T, TInfo, SC,
1938  isInlineSpecified, hasWrittenPrototype,
1939  ConstexprKind);
1940  }
1941 
1942  static FunctionDecl *Create(ASTContext &C, DeclContext *DC,
1943  SourceLocation StartLoc,
1944  const DeclarationNameInfo &NameInfo, QualType T,
1945  TypeSourceInfo *TInfo, StorageClass SC,
1946  bool isInlineSpecified, bool hasWrittenPrototype,
1947  ConstexprSpecKind ConstexprKind);
1948 
1949  static FunctionDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1950 
1952  return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
1953  }
1954 
1955  void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy,
1956  bool Qualified) const override;
1957 
1958  void setRangeEnd(SourceLocation E) { EndRangeLoc = E; }
1959 
1960  SourceRange getSourceRange() const override LLVM_READONLY;
1961 
1962  // Function definitions.
1963  //
1964  // A function declaration may be:
1965  // - a non defining declaration,
1966  // - a definition. A function may be defined because:
1967  // - it has a body, or will have it in the case of late parsing.
1968  // - it has an uninstantiated body. The body does not exist because the
1969  // function is not used yet, but the declaration is considered a
1970  // definition and does not allow other definition of this function.
1971  // - it does not have a user specified body, but it does not allow
1972  // redefinition, because it is deleted/defaulted or is defined through
1973  // some other mechanism (alias, ifunc).
1974 
1975  /// Returns true if the function has a body.
1976  ///
1977  /// The function body might be in any of the (re-)declarations of this
1978  /// function. The variant that accepts a FunctionDecl pointer will set that
1979  /// function declaration to the actual declaration containing the body (if
1980  /// there is one).
1981  bool hasBody(const FunctionDecl *&Definition) const;
1982 
1983  bool hasBody() const override {
1984  const FunctionDecl* Definition;
1985  return hasBody(Definition);
1986  }
1987 
1988  /// Returns whether the function has a trivial body that does not require any
1989  /// specific codegen.
1990  bool hasTrivialBody() const;
1991 
1992  /// Returns true if the function has a definition that does not need to be
1993  /// instantiated.
1994  ///
1995  /// The variant that accepts a FunctionDecl pointer will set that function
1996  /// declaration to the declaration that is a definition (if there is one).
1997  bool isDefined(const FunctionDecl *&Definition) const;
1998 
1999  virtual bool isDefined() const {
2000  const FunctionDecl* Definition;
2001  return isDefined(Definition);
2002  }
2003 
2004  /// Get the definition for this declaration.
2006  const FunctionDecl *Definition;
2007  if (isDefined(Definition))
2008  return const_cast<FunctionDecl *>(Definition);
2009  return nullptr;
2010  }
2011  const FunctionDecl *getDefinition() const {
2012  return const_cast<FunctionDecl *>(this)->getDefinition();
2013  }
2014 
2015  /// Retrieve the body (definition) of the function. The function body might be
2016  /// in any of the (re-)declarations of this function. The variant that accepts
2017  /// a FunctionDecl pointer will set that function declaration to the actual
2018  /// declaration containing the body (if there is one).
2019  /// NOTE: For checking if there is a body, use hasBody() instead, to avoid
2020  /// unnecessary AST de-serialization of the body.
2021  Stmt *getBody(const FunctionDecl *&Definition) const;
2022 
2023  Stmt *getBody() const override {
2024  const FunctionDecl* Definition;
2025  return getBody(Definition);
2026  }
2027 
2028  /// Returns whether this specific declaration of the function is also a
2029  /// definition that does not contain uninstantiated body.
2030  ///
2031  /// This does not determine whether the function has been defined (e.g., in a
2032  /// previous definition); for that information, use isDefined.
2034  return isDeletedAsWritten() || isDefaulted() || Body || hasSkippedBody() ||
2035  isLateTemplateParsed() || willHaveBody() || hasDefiningAttr();
2036  }
2037 
2038  /// Returns whether this specific declaration of the function has a body.
2040  return Body || isLateTemplateParsed();
2041  }
2042 
2043  void setBody(Stmt *B);
2044  void setLazyBody(uint64_t Offset) { Body = Offset; }
2045 
2046  /// Whether this function is variadic.
2047  bool isVariadic() const;
2048 
2049  /// Whether this function is marked as virtual explicitly.
2050  bool isVirtualAsWritten() const {
2051  return FunctionDeclBits.IsVirtualAsWritten;
2052  }
2053 
2054  /// State that this function is marked as virtual explicitly.
2055  void setVirtualAsWritten(bool V) { FunctionDeclBits.IsVirtualAsWritten = V; }
2056 
2057  /// Whether this virtual function is pure, i.e. makes the containing class
2058  /// abstract.
2059  bool isPure() const { return FunctionDeclBits.IsPure; }
2060  void setPure(bool P = true);
2061 
2062  /// Whether this templated function will be late parsed.
2063  bool isLateTemplateParsed() const {
2064  return FunctionDeclBits.IsLateTemplateParsed;
2065  }
2066 
2067  /// State that this templated function will be late parsed.
2068  void setLateTemplateParsed(bool ILT = true) {
2069  FunctionDeclBits.IsLateTemplateParsed = ILT;
2070  }
2071 
2072  /// Whether this function is "trivial" in some specialized C++ senses.
2073  /// Can only be true for default constructors, copy constructors,
2074  /// copy assignment operators, and destructors. Not meaningful until
2075  /// the class has been fully built by Sema.
2076  bool isTrivial() const { return FunctionDeclBits.IsTrivial; }
2077  void setTrivial(bool IT) { FunctionDeclBits.IsTrivial = IT; }
2078 
2079  bool isTrivialForCall() const { return FunctionDeclBits.IsTrivialForCall; }
2080  void setTrivialForCall(bool IT) { FunctionDeclBits.IsTrivialForCall = IT; }
2081 
2082  /// Whether this function is defaulted per C++0x. Only valid for
2083  /// special member functions.
2084  bool isDefaulted() const { return FunctionDeclBits.IsDefaulted; }
2085  void setDefaulted(bool D = true) { FunctionDeclBits.IsDefaulted = D; }
2086 
2087  /// Whether this function is explicitly defaulted per C++0x. Only valid
2088  /// for special member functions.
2089  bool isExplicitlyDefaulted() const {
2090  return FunctionDeclBits.IsExplicitlyDefaulted;
2091  }
2092 
2093  /// State that this function is explicitly defaulted per C++0x. Only valid
2094  /// for special member functions.
2095  void setExplicitlyDefaulted(bool ED = true) {
2096  FunctionDeclBits.IsExplicitlyDefaulted = ED;
2097  }
2098 
2099  /// Whether falling off this function implicitly returns null/zero.
2100  /// If a more specific implicit return value is required, front-ends
2101  /// should synthesize the appropriate return statements.
2102  bool hasImplicitReturnZero() const {
2103  return FunctionDeclBits.HasImplicitReturnZero;
2104  }
2105 
2106  /// State that falling off this function implicitly returns null/zero.
2107  /// If a more specific implicit return value is required, front-ends
2108  /// should synthesize the appropriate return statements.
2109  void setHasImplicitReturnZero(bool IRZ) {
2110  FunctionDeclBits.HasImplicitReturnZero = IRZ;
2111  }
2112 
2113  /// Whether this function has a prototype, either because one
2114  /// was explicitly written or because it was "inherited" by merging
2115  /// a declaration without a prototype with a declaration that has a
2116  /// prototype.
2117  bool hasPrototype() const {
2118  return hasWrittenPrototype() || hasInheritedPrototype();
2119  }
2120 
2121  /// Whether this function has a written prototype.
2122  bool hasWrittenPrototype() const {
2123  return FunctionDeclBits.HasWrittenPrototype;
2124  }
2125 
2126  /// State that this function has a written prototype.
2127  void setHasWrittenPrototype(bool P = true) {
2128  FunctionDeclBits.HasWrittenPrototype = P;
2129  }
2130 
2131  /// Whether this function inherited its prototype from a
2132  /// previous declaration.
2133  bool hasInheritedPrototype() const {
2134  return FunctionDeclBits.HasInheritedPrototype;
2135  }
2136 
2137  /// State that this function inherited its prototype from a
2138  /// previous declaration.
2139  void setHasInheritedPrototype(bool P = true) {
2140  FunctionDeclBits.HasInheritedPrototype = P;
2141  }
2142 
2143  /// Whether this is a (C++11) constexpr function or constexpr constructor.
2144  bool isConstexpr() const {
2145  return FunctionDeclBits.ConstexprKind != CSK_unspecified;
2146  }
2148  FunctionDeclBits.ConstexprKind = CSK;
2149  }
2151  return static_cast<ConstexprSpecKind>(FunctionDeclBits.ConstexprKind);
2152  }
2153  bool isConstexprSpecified() const {
2154  return FunctionDeclBits.ConstexprKind == CSK_constexpr;
2155  }
2156  bool isConsteval() const {
2157  return FunctionDeclBits.ConstexprKind == CSK_consteval;
2158  }
2159 
2160  /// Whether the instantiation of this function is pending.
2161  /// This bit is set when the decision to instantiate this function is made
2162  /// and unset if and when the function body is created. That leaves out
2163  /// cases where instantiation did not happen because the template definition
2164  /// was not seen in this TU. This bit remains set in those cases, under the
2165  /// assumption that the instantiation will happen in some other TU.
2166  bool instantiationIsPending() const {
2167  return FunctionDeclBits.InstantiationIsPending;
2168  }
2169 
2170  /// State that the instantiation of this function is pending.
2171  /// (see instantiationIsPending)
2173  FunctionDeclBits.InstantiationIsPending = IC;
2174  }
2175 
2176  /// Indicates the function uses __try.
2177  bool usesSEHTry() const { return FunctionDeclBits.UsesSEHTry; }
2178  void setUsesSEHTry(bool UST) { FunctionDeclBits.UsesSEHTry = UST; }
2179 
2180  /// Whether this function has been deleted.
2181  ///
2182  /// A function that is "deleted" (via the C++0x "= delete" syntax)
2183  /// acts like a normal function, except that it cannot actually be
2184  /// called or have its address taken. Deleted functions are
2185  /// typically used in C++ overload resolution to attract arguments
2186  /// whose type or lvalue/rvalue-ness would permit the use of a
2187  /// different overload that would behave incorrectly. For example,
2188  /// one might use deleted functions to ban implicit conversion from
2189  /// a floating-point number to an Integer type:
2190  ///
2191  /// @code
2192  /// struct Integer {
2193  /// Integer(long); // construct from a long
2194  /// Integer(double) = delete; // no construction from float or double
2195  /// Integer(long double) = delete; // no construction from long double
2196  /// };
2197  /// @endcode
2198  // If a function is deleted, its first declaration must be.
2199  bool isDeleted() const {
2200  return getCanonicalDecl()->FunctionDeclBits.IsDeleted;
2201  }
2202 
2203  bool isDeletedAsWritten() const {
2204  return FunctionDeclBits.IsDeleted && !isDefaulted();
2205  }
2206 
2207  void setDeletedAsWritten(bool D = true) { FunctionDeclBits.IsDeleted = D; }
2208 
2209  /// Determines whether this function is "main", which is the
2210  /// entry point into an executable program.
2211  bool isMain() const;
2212 
2213  /// Determines whether this function is a MSVCRT user defined entry
2214  /// point.
2215  bool isMSVCRTEntryPoint() const;
2216 
2217  /// Determines whether this operator new or delete is one
2218  /// of the reserved global placement operators:
2219  /// void *operator new(size_t, void *);
2220  /// void *operator new[](size_t, void *);
2221  /// void operator delete(void *, void *);
2222  /// void operator delete[](void *, void *);
2223  /// These functions have special behavior under [new.delete.placement]:
2224  /// These functions are reserved, a C++ program may not define
2225  /// functions that displace the versions in the Standard C++ library.
2226  /// The provisions of [basic.stc.dynamic] do not apply to these
2227  /// reserved placement forms of operator new and operator delete.
2228  ///
2229  /// This function must be an allocation or deallocation function.
2230  bool isReservedGlobalPlacementOperator() const;
2231 
2232  /// Determines whether this function is one of the replaceable
2233  /// global allocation functions:
2234  /// void *operator new(size_t);
2235  /// void *operator new(size_t, const std::nothrow_t &) noexcept;
2236  /// void *operator new[](size_t);
2237  /// void *operator new[](size_t, const std::nothrow_t &) noexcept;
2238  /// void operator delete(void *) noexcept;
2239  /// void operator delete(void *, std::size_t) noexcept; [C++1y]
2240  /// void operator delete(void *, const std::nothrow_t &) noexcept;
2241  /// void operator delete[](void *) noexcept;
2242  /// void operator delete[](void *, std::size_t) noexcept; [C++1y]
2243  /// void operator delete[](void *, const std::nothrow_t &) noexcept;
2244  /// These functions have special behavior under C++1y [expr.new]:
2245  /// An implementation is allowed to omit a call to a replaceable global
2246  /// allocation function. [...]
2247  ///
2248  /// If this function is an aligned allocation/deallocation function, return
2249  /// true through IsAligned.
2250  bool isReplaceableGlobalAllocationFunction(bool *IsAligned = nullptr) const;
2251 
2252  /// Determine whether this is a destroying operator delete.
2253  bool isDestroyingOperatorDelete() const;
2254 
2255  /// Compute the language linkage.
2256  LanguageLinkage getLanguageLinkage() const;
2257 
2258  /// Determines whether this function is a function with
2259  /// external, C linkage.
2260  bool isExternC() const;
2261 
2262  /// Determines whether this function's context is, or is nested within,
2263  /// a C++ extern "C" linkage spec.
2264  bool isInExternCContext() const;
2265 
2266  /// Determines whether this function's context is, or is nested within,
2267  /// a C++ extern "C++" linkage spec.
2268  bool isInExternCXXContext() const;
2269 
2270  /// Determines whether this is a global function.
2271  bool isGlobal() const;
2272 
2273  /// Determines whether this function is known to be 'noreturn', through
2274  /// an attribute on its declaration or its type.
2275  bool isNoReturn() const;
2276 
2277  /// True if the function was a definition but its body was skipped.
2278  bool hasSkippedBody() const { return FunctionDeclBits.HasSkippedBody; }
2279  void setHasSkippedBody(bool Skipped = true) {
2280  FunctionDeclBits.HasSkippedBody = Skipped;
2281  }
2282 
2283  /// True if this function will eventually have a body, once it's fully parsed.
2284  bool willHaveBody() const { return FunctionDeclBits.WillHaveBody; }
2285  void setWillHaveBody(bool V = true) { FunctionDeclBits.WillHaveBody = V; }
2286 
2287  /// True if this function is considered a multiversioned function.
2288  bool isMultiVersion() const {
2289  return getCanonicalDecl()->FunctionDeclBits.IsMultiVersion;
2290  }
2291 
2292  /// Sets the multiversion state for this declaration and all of its
2293  /// redeclarations.
2294  void setIsMultiVersion(bool V = true) {
2295  getCanonicalDecl()->FunctionDeclBits.IsMultiVersion = V;
2296  }
2297 
2298  /// Gets the kind of multiversioning attribute this declaration has. Note that
2299  /// this can return a value even if the function is not multiversion, such as
2300  /// the case of 'target'.
2301  MultiVersionKind getMultiVersionKind() const;
2302 
2303 
2304  /// True if this function is a multiversioned dispatch function as a part of
2305  /// the cpu_specific/cpu_dispatch functionality.
2306  bool isCPUDispatchMultiVersion() const;
2307  /// True if this function is a multiversioned processor specific function as a
2308  /// part of the cpu_specific/cpu_dispatch functionality.
2309  bool isCPUSpecificMultiVersion() const;
2310 
2311  /// True if this function is a multiversioned dispatch function as a part of
2312  /// the target functionality.
2313  bool isTargetMultiVersion() const;
2314 
2315  void setPreviousDeclaration(FunctionDecl * PrevDecl);
2316 
2317  FunctionDecl *getCanonicalDecl() override;
2319  return const_cast<FunctionDecl*>(this)->getCanonicalDecl();
2320  }
2321 
2322  unsigned getBuiltinID(bool ConsiderWrapperFunctions = false) const;
2323 
2324  // ArrayRef interface to parameters.
2326  return {ParamInfo, getNumParams()};
2327  }
2329  return {ParamInfo, getNumParams()};
2330  }
2331 
2332  // Iterator access to formal parameters.
2335 
2336  bool param_empty() const { return parameters().empty(); }
2337  param_iterator param_begin() { return parameters().begin(); }
2338  param_iterator param_end() { return parameters().end(); }
2339  param_const_iterator param_begin() const { return parameters().begin(); }
2340  param_const_iterator param_end() const { return parameters().end(); }
2341  size_t param_size() const { return parameters().size(); }
2342 
2343  /// Return the number of parameters this function must have based on its
2344  /// FunctionType. This is the length of the ParamInfo array after it has been
2345  /// created.
2346  unsigned getNumParams() const;
2347 
2348  const ParmVarDecl *getParamDecl(unsigned i) const {
2349  assert(i < getNumParams() && "Illegal param #");
2350  return ParamInfo[i];
2351  }
2352  ParmVarDecl *getParamDecl(unsigned i) {
2353  assert(i < getNumParams() && "Illegal param #");
2354  return ParamInfo[i];
2355  }
2356  void setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
2357  setParams(getASTContext(), NewParamInfo);
2358  }
2359 
2360  /// Returns the minimum number of arguments needed to call this function. This
2361  /// may be fewer than the number of function parameters, if some of the
2362  /// parameters have default arguments (in C++).
2363  unsigned getMinRequiredArguments() const;
2364 
2366  return getType()->castAs<FunctionType>()->getReturnType();
2367  }
2368 
2369  /// Attempt to compute an informative source range covering the
2370  /// function return type. This may omit qualifiers and other information with
2371  /// limited representation in the AST.
2372  SourceRange getReturnTypeSourceRange() const;
2373 
2374  /// Get the declared return type, which may differ from the actual return
2375  /// type if the return type is deduced.
2377  auto *TSI = getTypeSourceInfo();
2378  QualType T = TSI ? TSI->getType() : getType();
2379  return T->castAs<FunctionType>()->getReturnType();
2380  }
2381 
2382  /// Gets the ExceptionSpecificationType as declared.
2384  auto *TSI = getTypeSourceInfo();
2385  QualType T = TSI ? TSI->getType() : getType();
2386  const auto *FPT = T->getAs<FunctionProtoType>();
2387  return FPT ? FPT->getExceptionSpecType() : EST_None;
2388  }
2389 
2390  /// Attempt to compute an informative source range covering the
2391  /// function exception specification, if any.
2392  SourceRange getExceptionSpecSourceRange() const;
2393 
2394  /// Determine the type of an expression that calls this function.
2396  return getType()->castAs<FunctionType>()->getCallResultType(
2397  getASTContext());
2398  }
2399 
2400  /// Returns the storage class as written in the source. For the
2401  /// computed linkage of symbol, see getLinkage.
2403  return static_cast<StorageClass>(FunctionDeclBits.SClass);
2404  }
2405 
2406  /// Sets the storage class as written in the source.
2408  FunctionDeclBits.SClass = SClass;
2409  }
2410 
2411  /// Determine whether the "inline" keyword was specified for this
2412  /// function.
2413  bool isInlineSpecified() const { return FunctionDeclBits.IsInlineSpecified; }
2414 
2415  /// Set whether the "inline" keyword was specified for this function.
2416  void setInlineSpecified(bool I) {
2417  FunctionDeclBits.IsInlineSpecified = I;
2418  FunctionDeclBits.IsInline = I;
2419  }
2420 
2421  /// Flag that this function is implicitly inline.
2422  void setImplicitlyInline(bool I = true) { FunctionDeclBits.IsInline = I; }
2423 
2424  /// Determine whether this function should be inlined, because it is
2425  /// either marked "inline" or "constexpr" or is a member function of a class
2426  /// that was defined in the class body.
2427  bool isInlined() const { return FunctionDeclBits.IsInline; }
2428 
2429  bool isInlineDefinitionExternallyVisible() const;
2430 
2431  bool isMSExternInline() const;
2432 
2433  bool doesDeclarationForceExternallyVisibleDefinition() const;
2434 
2435  bool isStatic() const { return getStorageClass() == SC_Static; }
2436 
2437  /// Whether this function declaration represents an C++ overloaded
2438  /// operator, e.g., "operator+".
2439  bool isOverloadedOperator() const {
2440  return getOverloadedOperator() != OO_None;
2441  }
2442 
2443  OverloadedOperatorKind getOverloadedOperator() const;
2444 
2445  const IdentifierInfo *getLiteralIdentifier() const;
2446 
2447  /// If this function is an instantiation of a member function
2448  /// of a class template specialization, retrieves the function from
2449  /// which it was instantiated.
2450  ///
2451  /// This routine will return non-NULL for (non-templated) member
2452  /// functions of class templates and for instantiations of function
2453  /// templates. For example, given:
2454  ///
2455  /// \code
2456  /// template<typename T>
2457  /// struct X {
2458  /// void f(T);
2459  /// };
2460  /// \endcode
2461  ///
2462  /// The declaration for X<int>::f is a (non-templated) FunctionDecl
2463  /// whose parent is the class template specialization X<int>. For
2464  /// this declaration, getInstantiatedFromFunction() will return
2465  /// the FunctionDecl X<T>::A. When a complete definition of
2466  /// X<int>::A is required, it will be instantiated from the
2467  /// declaration returned by getInstantiatedFromMemberFunction().
2468  FunctionDecl *getInstantiatedFromMemberFunction() const;
2469 
2470  /// What kind of templated function this is.
2471  TemplatedKind getTemplatedKind() const;
2472 
2473  /// If this function is an instantiation of a member function of a
2474  /// class template specialization, retrieves the member specialization
2475  /// information.
2476  MemberSpecializationInfo *getMemberSpecializationInfo() const;
2477 
2478  /// Specify that this record is an instantiation of the
2479  /// member function FD.
2482  setInstantiationOfMemberFunction(getASTContext(), FD, TSK);
2483  }
2484 
2485  /// Retrieves the function template that is described by this
2486  /// function declaration.
2487  ///
2488  /// Every function template is represented as a FunctionTemplateDecl
2489  /// and a FunctionDecl (or something derived from FunctionDecl). The
2490  /// former contains template properties (such as the template
2491  /// parameter lists) while the latter contains the actual
2492  /// description of the template's
2493  /// contents. FunctionTemplateDecl::getTemplatedDecl() retrieves the
2494  /// FunctionDecl that describes the function template,
2495  /// getDescribedFunctionTemplate() retrieves the
2496  /// FunctionTemplateDecl from a FunctionDecl.
2497  FunctionTemplateDecl *getDescribedFunctionTemplate() const;
2498 
2499  void setDescribedFunctionTemplate(FunctionTemplateDecl *Template);
2500 
2501  /// Determine whether this function is a function template
2502  /// specialization.
2504  return getPrimaryTemplate() != nullptr;
2505  }
2506 
2507  /// If this function is actually a function template specialization,
2508  /// retrieve information about this function template specialization.
2509  /// Otherwise, returns NULL.
2510  FunctionTemplateSpecializationInfo *getTemplateSpecializationInfo() const;
2511 
2512  /// Determines whether this function is a function template
2513  /// specialization or a member of a class template specialization that can
2514  /// be implicitly instantiated.
2515  bool isImplicitlyInstantiable() const;
2516 
2517  /// Determines if the given function was instantiated from a
2518  /// function template.
2519  bool isTemplateInstantiation() const;
2520 
2521  /// Retrieve the function declaration from which this function could
2522  /// be instantiated, if it is an instantiation (rather than a non-template
2523  /// or a specialization, for example).
2524  FunctionDecl *getTemplateInstantiationPattern() const;
2525 
2526  /// Retrieve the primary template that this function template
2527  /// specialization either specializes or was instantiated from.
2528  ///
2529  /// If this function declaration is not a function template specialization,
2530  /// returns NULL.
2531  FunctionTemplateDecl *getPrimaryTemplate() const;
2532 
2533  /// Retrieve the template arguments used to produce this function
2534  /// template specialization from the primary template.
2535  ///
2536  /// If this function declaration is not a function template specialization,
2537  /// returns NULL.
2538  const TemplateArgumentList *getTemplateSpecializationArgs() const;
2539 
2540  /// Retrieve the template argument list as written in the sources,
2541  /// if any.
2542  ///
2543  /// If this function declaration is not a function template specialization
2544  /// or if it had no explicit template argument list, returns NULL.
2545  /// Note that it an explicit template argument list may be written empty,
2546  /// e.g., template<> void foo<>(char* s);
2548  getTemplateSpecializationArgsAsWritten() const;
2549 
2550  /// Specify that this function declaration is actually a function
2551  /// template specialization.
2552  ///
2553  /// \param Template the function template that this function template
2554  /// specialization specializes.
2555  ///
2556  /// \param TemplateArgs the template arguments that produced this
2557  /// function template specialization from the template.
2558  ///
2559  /// \param InsertPos If non-NULL, the position in the function template
2560  /// specialization set where the function template specialization data will
2561  /// be inserted.
2562  ///
2563  /// \param TSK the kind of template specialization this is.
2564  ///
2565  /// \param TemplateArgsAsWritten location info of template arguments.
2566  ///
2567  /// \param PointOfInstantiation point at which the function template
2568  /// specialization was first instantiated.
2569  void setFunctionTemplateSpecialization(FunctionTemplateDecl *Template,
2570  const TemplateArgumentList *TemplateArgs,
2571  void *InsertPos,
2573  const TemplateArgumentListInfo *TemplateArgsAsWritten = nullptr,
2574  SourceLocation PointOfInstantiation = SourceLocation()) {
2575  setFunctionTemplateSpecialization(getASTContext(), Template, TemplateArgs,
2576  InsertPos, TSK, TemplateArgsAsWritten,
2577  PointOfInstantiation);
2578  }
2579 
2580  /// Specifies that this function declaration is actually a
2581  /// dependent function template specialization.
2582  void setDependentTemplateSpecialization(ASTContext &Context,
2583  const UnresolvedSetImpl &Templates,
2584  const TemplateArgumentListInfo &TemplateArgs);
2585 
2587  getDependentSpecializationInfo() const;
2588 
2589  /// Determine what kind of template instantiation this function
2590  /// represents.
2592 
2593  /// Determine the kind of template specialization this function represents
2594  /// for the purpose of template instantiation.
2596  getTemplateSpecializationKindForInstantiation() const;
2597 
2598  /// Determine what kind of template instantiation this function
2599  /// represents.
2600  void setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2601  SourceLocation PointOfInstantiation = SourceLocation());
2602 
2603  /// Retrieve the (first) point of instantiation of a function template
2604  /// specialization or a member of a class template specialization.
2605  ///
2606  /// \returns the first point of instantiation, if this function was
2607  /// instantiated from a template; otherwise, returns an invalid source
2608  /// location.
2609  SourceLocation getPointOfInstantiation() const;
2610 
2611  /// Determine whether this is or was instantiated from an out-of-line
2612  /// definition of a member function.
2613  bool isOutOfLine() const override;
2614 
2615  /// Identify a memory copying or setting function.
2616  /// If the given function is a memory copy or setting function, returns
2617  /// the corresponding Builtin ID. If the function is not a memory function,
2618  /// returns 0.
2619  unsigned getMemoryFunctionKind() const;
2620 
2621  /// Returns ODRHash of the function. This value is calculated and
2622  /// stored on first call, then the stored value returned on the other calls.
2623  unsigned getODRHash();
2624 
2625  /// Returns cached ODRHash of the function. This must have been previously
2626  /// computed and stored.
2627  unsigned getODRHash() const;
2628 
2629  // Implement isa/cast/dyncast/etc.
2630  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2631  static bool classofKind(Kind K) {
2632  return K >= firstFunction && K <= lastFunction;
2633  }
2635  return static_cast<DeclContext *>(const_cast<FunctionDecl*>(D));
2636  }
2638  return static_cast<FunctionDecl *>(const_cast<DeclContext*>(DC));
2639  }
2640 };
2641 
2642 /// Represents a member of a struct/union/class.
2643 class FieldDecl : public DeclaratorDecl, public Mergeable<FieldDecl> {
2644  unsigned BitField : 1;
2645  unsigned Mutable : 1;
2646  mutable unsigned CachedFieldIndex : 30;
2647 
2648  /// The kinds of value we can store in InitializerOrBitWidth.
2649  ///
2650  /// Note that this is compatible with InClassInitStyle except for
2651  /// ISK_CapturedVLAType.
2652  enum InitStorageKind {
2653  /// If the pointer is null, there's nothing special. Otherwise,
2654  /// this is a bitfield and the pointer is the Expr* storing the
2655  /// bit-width.
2656  ISK_NoInit = (unsigned) ICIS_NoInit,
2657 
2658  /// The pointer is an (optional due to delayed parsing) Expr*
2659  /// holding the copy-initializer.
2660  ISK_InClassCopyInit = (unsigned) ICIS_CopyInit,
2661 
2662  /// The pointer is an (optional due to delayed parsing) Expr*
2663  /// holding the list-initializer.
2664  ISK_InClassListInit = (unsigned) ICIS_ListInit,
2665 
2666  /// The pointer is a VariableArrayType* that's been captured;
2667  /// the enclosing context is a lambda or captured statement.
2668  ISK_CapturedVLAType,
2669  };
2670 
2671  /// If this is a bitfield with a default member initializer, this
2672  /// structure is used to represent the two expressions.
2673  struct InitAndBitWidth {
2674  Expr *Init;
2675  Expr *BitWidth;
2676  };
2677 
2678  /// Storage for either the bit-width, the in-class initializer, or
2679  /// both (via InitAndBitWidth), or the captured variable length array bound.
2680  ///
2681  /// If the storage kind is ISK_InClassCopyInit or
2682  /// ISK_InClassListInit, but the initializer is null, then this
2683  /// field has an in-class initializer that has not yet been parsed
2684  /// and attached.
2685  // FIXME: Tail-allocate this to reduce the size of FieldDecl in the
2686  // overwhelmingly common case that we have none of these things.
2687  llvm::PointerIntPair<void *, 2, InitStorageKind> InitStorage;
2688 
2689 protected:
2692  QualType T, TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
2693  InClassInitStyle InitStyle)
2694  : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc),
2695  BitField(false), Mutable(Mutable), CachedFieldIndex(0),
2696  InitStorage(nullptr, (InitStorageKind) InitStyle) {
2697  if (BW)
2698  setBitWidth(BW);
2699  }
2700 
2701 public:
2702  friend class ASTDeclReader;
2703  friend class ASTDeclWriter;
2704 
2705  static FieldDecl *Create(const ASTContext &C, DeclContext *DC,
2706  SourceLocation StartLoc, SourceLocation IdLoc,
2708  TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
2709  InClassInitStyle InitStyle);
2710 
2711  static FieldDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2712 
2713  /// Returns the index of this field within its record,
2714  /// as appropriate for passing to ASTRecordLayout::getFieldOffset.
2715  unsigned getFieldIndex() const;
2716 
2717  /// Determines whether this field is mutable (C++ only).
2718  bool isMutable() const { return Mutable; }
2719 
2720  /// Determines whether this field is a bitfield.
2721  bool isBitField() const { return BitField; }
2722 
2723  /// Determines whether this is an unnamed bitfield.
2724  bool isUnnamedBitfield() const { return isBitField() && !getDeclName(); }
2725 
2726  /// Determines whether this field is a
2727  /// representative for an anonymous struct or union. Such fields are
2728  /// unnamed and are implicitly generated by the implementation to
2729  /// store the data for the anonymous union or struct.
2730  bool isAnonymousStructOrUnion() const;
2731 
2732  Expr *getBitWidth() const {
2733  if (!BitField)
2734  return nullptr;
2735  void *Ptr = InitStorage.getPointer();
2736  if (getInClassInitStyle())
2737  return static_cast<InitAndBitWidth*>(Ptr)->BitWidth;
2738  return static_cast<Expr*>(Ptr);
2739  }
2740 
2741  unsigned getBitWidthValue(const ASTContext &Ctx) const;
2742 
2743  /// Set the bit-field width for this member.
2744  // Note: used by some clients (i.e., do not remove it).
2745  void setBitWidth(Expr *Width) {
2746  assert(!hasCapturedVLAType() && !BitField &&
2747  "bit width or captured type already set");
2748  assert(Width && "no bit width specified");
2749  InitStorage.setPointer(
2750  InitStorage.getInt()
2751  ? new (getASTContext())
2752  InitAndBitWidth{getInClassInitializer(), Width}
2753  : static_cast<void*>(Width));
2754  BitField = true;
2755  }
2756 
2757  /// Remove the bit-field width from this member.
2758  // Note: used by some clients (i.e., do not remove it).
2760  assert(isBitField() && "no bitfield width to remove");
2761  InitStorage.setPointer(getInClassInitializer());
2762  BitField = false;
2763  }
2764 
2765  /// Is this a zero-length bit-field? Such bit-fields aren't really bit-fields
2766  /// at all and instead act as a separator between contiguous runs of other
2767  /// bit-fields.
2768  bool isZeroLengthBitField(const ASTContext &Ctx) const;
2769 
2770  /// Determine if this field is a subobject of zero size, that is, either a
2771  /// zero-length bit-field or a field of empty class type with the
2772  /// [[no_unique_address]] attribute.
2773  bool isZeroSize(const ASTContext &Ctx) const;
2774 
2775  /// Get the kind of (C++11) default member initializer that this field has.
2777  InitStorageKind storageKind = InitStorage.getInt();
2778  return (storageKind == ISK_CapturedVLAType
2779  ? ICIS_NoInit : (InClassInitStyle) storageKind);
2780  }
2781 
2782  /// Determine whether this member has a C++11 default member initializer.
2783  bool hasInClassInitializer() const {
2784  return getInClassInitStyle() != ICIS_NoInit;
2785  }
2786 
2787  /// Get the C++11 default member initializer for this member, or null if one
2788  /// has not been set. If a valid declaration has a default member initializer,
2789  /// but this returns null, then we have not parsed and attached it yet.
2791  if (!hasInClassInitializer())
2792  return nullptr;
2793  void *Ptr = InitStorage.getPointer();
2794  if (BitField)
2795  return static_cast<InitAndBitWidth*>(Ptr)->Init;
2796  return static_cast<Expr*>(Ptr);
2797  }
2798 
2799  /// Set the C++11 in-class initializer for this member.
2801  assert(hasInClassInitializer() && !getInClassInitializer());
2802  if (BitField)
2803  static_cast<InitAndBitWidth*>(InitStorage.getPointer())->Init = Init;
2804  else
2805  InitStorage.setPointer(Init);
2806  }
2807 
2808  /// Remove the C++11 in-class initializer from this member.
2810  assert(hasInClassInitializer() && "no initializer to remove");
2811  InitStorage.setPointerAndInt(getBitWidth(), ISK_NoInit);
2812  }
2813 
2814  /// Determine whether this member captures the variable length array
2815  /// type.
2816  bool hasCapturedVLAType() const {
2817  return InitStorage.getInt() == ISK_CapturedVLAType;
2818  }
2819 
2820  /// Get the captured variable length array type.
2822  return hasCapturedVLAType() ? static_cast<const VariableArrayType *>(
2823  InitStorage.getPointer())
2824  : nullptr;
2825  }
2826 
2827  /// Set the captured variable length array type for this field.
2828  void setCapturedVLAType(const VariableArrayType *VLAType);
2829 
2830  /// Returns the parent of this field declaration, which
2831  /// is the struct in which this field is defined.
2832  const RecordDecl *getParent() const {
2833  return cast<RecordDecl>(getDeclContext());
2834  }
2835 
2837  return cast<RecordDecl>(getDeclContext());
2838  }
2839 
2840  SourceRange getSourceRange() const override LLVM_READONLY;
2841 
2842  /// Retrieves the canonical declaration of this field.
2843  FieldDecl *getCanonicalDecl() override { return getFirstDecl(); }
2844  const FieldDecl *getCanonicalDecl() const { return getFirstDecl(); }
2845 
2846  // Implement isa/cast/dyncast/etc.
2847  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2848  static bool classofKind(Kind K) { return K >= firstField && K <= lastField; }
2849 };
2850 
2851 /// An instance of this object exists for each enum constant
2852 /// that is defined. For example, in "enum X {a,b}", each of a/b are
2853 /// EnumConstantDecl's, X is an instance of EnumDecl, and the type of a/b is a
2854 /// TagType for the X EnumDecl.
2855 class EnumConstantDecl : public ValueDecl, public Mergeable<EnumConstantDecl> {
2856  Stmt *Init; // an integer constant expression
2857  llvm::APSInt Val; // The value.
2858 
2859 protected:
2861  IdentifierInfo *Id, QualType T, Expr *E,
2862  const llvm::APSInt &V)
2863  : ValueDecl(EnumConstant, DC, L, Id, T), Init((Stmt*)E), Val(V) {}
2864 
2865 public:
2866  friend class StmtIteratorBase;
2867 
2868  static EnumConstantDecl *Create(ASTContext &C, EnumDecl *DC,
2870  QualType T, Expr *E,
2871  const llvm::APSInt &V);
2872  static EnumConstantDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2873 
2874  const Expr *getInitExpr() const { return (const Expr*) Init; }
2875  Expr *getInitExpr() { return (Expr*) Init; }
2876  const llvm::APSInt &getInitVal() const { return Val; }
2877 
2878  void setInitExpr(Expr *E) { Init = (Stmt*) E; }
2879  void setInitVal(const llvm::APSInt &V) { Val = V; }
2880 
2881  SourceRange getSourceRange() const override LLVM_READONLY;
2882 
2883  /// Retrieves the canonical declaration of this enumerator.
2884  EnumConstantDecl *getCanonicalDecl() override { return getFirstDecl(); }
2885  const EnumConstantDecl *getCanonicalDecl() const { return getFirstDecl(); }
2886 
2887  // Implement isa/cast/dyncast/etc.
2888  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2889  static bool classofKind(Kind K) { return K == EnumConstant; }
2890 };
2891 
2892 /// Represents a field injected from an anonymous union/struct into the parent
2893 /// scope. These are always implicit.
2895  public Mergeable<IndirectFieldDecl> {
2896  NamedDecl **Chaining;
2897  unsigned ChainingSize;
2898 
2902 
2903  void anchor() override;
2904 
2905 public:
2906  friend class ASTDeclReader;
2907 
2911 
2912  static IndirectFieldDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2913 
2915 
2917  return llvm::makeArrayRef(Chaining, ChainingSize);
2918  }
2919  chain_iterator chain_begin() const { return chain().begin(); }
2920  chain_iterator chain_end() const { return chain().end(); }
2921 
2922  unsigned getChainingSize() const { return ChainingSize; }
2923 
2925  assert(chain().size() >= 2);
2926  return cast<FieldDecl>(chain().back());
2927  }
2928 
2929  VarDecl *getVarDecl() const {
2930  assert(chain().size() >= 2);
2931  return dyn_cast<VarDecl>(chain().front());
2932  }
2933 
2934  IndirectFieldDecl *getCanonicalDecl() override { return getFirstDecl(); }
2935  const IndirectFieldDecl *getCanonicalDecl() const { return getFirstDecl(); }
2936 
2937  // Implement isa/cast/dyncast/etc.
2938  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2939  static bool classofKind(Kind K) { return K == IndirectField; }
2940 };
2941 
2942 /// Represents a declaration of a type.
2943 class TypeDecl : public NamedDecl {
2944  friend class ASTContext;
2945 
2946  /// This indicates the Type object that represents
2947  /// this TypeDecl. It is a cache maintained by
2948  /// ASTContext::getTypedefType, ASTContext::getTagDeclType, and
2949  /// ASTContext::getTemplateTypeParmType, and TemplateTypeParmDecl.
2950  mutable const Type *TypeForDecl = nullptr;
2951 
2952  /// The start of the source range for this declaration.
2953  SourceLocation LocStart;
2954 
2955  void anchor() override;
2956 
2957 protected:
2959  SourceLocation StartL = SourceLocation())
2960  : NamedDecl(DK, DC, L, Id), LocStart(StartL) {}
2961 
2962 public:
2963  // Low-level accessor. If you just want the type defined by this node,
2964  // check out ASTContext::getTypeDeclType or one of
2965  // ASTContext::getTypedefType, ASTContext::getRecordType, etc. if you
2966  // already know the specific kind of node this is.
2967  const Type *getTypeForDecl() const { return TypeForDecl; }
2968  void setTypeForDecl(const Type *TD) { TypeForDecl = TD; }
2969 
2970  SourceLocation getBeginLoc() const LLVM_READONLY { return LocStart; }
2971  void setLocStart(SourceLocation L) { LocStart = L; }
2972  SourceRange getSourceRange() const override LLVM_READONLY {
2973  if (LocStart.isValid())
2974  return SourceRange(LocStart, getLocation());
2975  else
2976  return SourceRange(getLocation());
2977  }
2978 
2979  // Implement isa/cast/dyncast/etc.
2980  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2981  static bool classofKind(Kind K) { return K >= firstType && K <= lastType; }
2982 };
2983 
2984 /// Base class for declarations which introduce a typedef-name.
2985 class TypedefNameDecl : public TypeDecl, public Redeclarable<TypedefNameDecl> {
2986  struct alignas(8) ModedTInfo {
2987  TypeSourceInfo *first;
2988  QualType second;
2989  };
2990 
2991  /// If int part is 0, we have not computed IsTransparentTag.
2992  /// Otherwise, IsTransparentTag is (getInt() >> 1).
2993  mutable llvm::PointerIntPair<
2994  llvm::PointerUnion<TypeSourceInfo *, ModedTInfo *>, 2>
2995  MaybeModedTInfo;
2996 
2997  void anchor() override;
2998 
2999 protected:
3001  SourceLocation StartLoc, SourceLocation IdLoc,
3002  IdentifierInfo *Id, TypeSourceInfo *TInfo)
3003  : TypeDecl(DK, DC, IdLoc, Id, StartLoc), redeclarable_base(C),
3004  MaybeModedTInfo(TInfo, 0) {}
3005 
3007 
3009  return getNextRedeclaration();
3010  }
3011 
3013  return getPreviousDecl();
3014  }
3015 
3017  return getMostRecentDecl();
3018  }
3019 
3020 public:
3022  using redecl_iterator = redeclarable_base::redecl_iterator;
3023 
3024  using redeclarable_base::redecls_begin;
3025  using redeclarable_base::redecls_end;
3026  using redeclarable_base::redecls;
3027  using redeclarable_base::getPreviousDecl;
3028  using redeclarable_base::getMostRecentDecl;
3029  using redeclarable_base::isFirstDecl;
3030 
3031  bool isModed() const {
3032  return MaybeModedTInfo.getPointer().is<ModedTInfo *>();
3033  }
3034 
3036  return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->first
3037  : MaybeModedTInfo.getPointer().get<TypeSourceInfo *>();
3038  }
3039 
3041  return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->second
3042  : MaybeModedTInfo.getPointer()
3043  .get<TypeSourceInfo *>()
3044  ->getType();
3045  }
3046 
3048  MaybeModedTInfo.setPointer(newType);
3049  }
3050 
3051  void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy) {
3052  MaybeModedTInfo.setPointer(new (getASTContext(), 8)
3053  ModedTInfo({unmodedTSI, modedTy}));
3054  }
3055 
3056  /// Retrieves the canonical declaration of this typedef-name.
3057  TypedefNameDecl *getCanonicalDecl() override { return getFirstDecl(); }
3058  const TypedefNameDecl *getCanonicalDecl() const { return getFirstDecl(); }
3059 
3060  /// Retrieves the tag declaration for which this is the typedef name for
3061  /// linkage purposes, if any.
3062  ///
3063  /// \param AnyRedecl Look for the tag declaration in any redeclaration of
3064  /// this typedef declaration.
3065  TagDecl *getAnonDeclWithTypedefName(bool AnyRedecl = false) const;
3066 
3067  /// Determines if this typedef shares a name and spelling location with its
3068  /// underlying tag type, as is the case with the NS_ENUM macro.
3069  bool isTransparentTag() const {
3070  if (MaybeModedTInfo.getInt())
3071  return MaybeModedTInfo.getInt() & 0x2;
3072  return isTransparentTagSlow();
3073  }
3074 
3075  // Implement isa/cast/dyncast/etc.
3076  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3077  static bool classofKind(Kind K) {
3078  return K >= firstTypedefName && K <= lastTypedefName;
3079  }
3080 
3081 private:
3082  bool isTransparentTagSlow() const;
3083 };
3084 
3085 /// Represents the declaration of a typedef-name via the 'typedef'
3086 /// type specifier.
3090  : TypedefNameDecl(Typedef, C, DC, StartLoc, IdLoc, Id, TInfo) {}
3091 
3092 public:
3093  static TypedefDecl *Create(ASTContext &C, DeclContext *DC,
3094  SourceLocation StartLoc, SourceLocation IdLoc,
3095  IdentifierInfo *Id, TypeSourceInfo *TInfo);
3096  static TypedefDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3097 
3098  SourceRange getSourceRange() const override LLVM_READONLY;
3099 
3100  // Implement isa/cast/dyncast/etc.
3101  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3102  static bool classofKind(Kind K) { return K == Typedef; }
3103 };
3104 
3105 /// Represents the declaration of a typedef-name via a C++11
3106 /// alias-declaration.
3108  /// The template for which this is the pattern, if any.
3109  TypeAliasTemplateDecl *Template;
3110 
3113  : TypedefNameDecl(TypeAlias, C, DC, StartLoc, IdLoc, Id, TInfo),
3114  Template(nullptr) {}
3115 
3116 public:
3117  static TypeAliasDecl *Create(ASTContext &C, DeclContext *DC,
3118  SourceLocation StartLoc, SourceLocation IdLoc,
3119  IdentifierInfo *Id, TypeSourceInfo *TInfo);
3120  static TypeAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3121 
3122  SourceRange getSourceRange() const override LLVM_READONLY;
3123 
3124  TypeAliasTemplateDecl *getDescribedAliasTemplate() const { return Template; }
3125  void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT) { Template = TAT; }
3126 
3127  // Implement isa/cast/dyncast/etc.
3128  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3129  static bool classofKind(Kind K) { return K == TypeAlias; }
3130 };
3131 
3132 /// Represents the declaration of a struct/union/class/enum.
3133 class TagDecl : public TypeDecl,
3134  public DeclContext,
3135  public Redeclarable<TagDecl> {
3136  // This class stores some data in DeclContext::TagDeclBits
3137  // to save some space. Use the provided accessors to access it.
3138 public:
3139  // This is really ugly.
3141 
3142 private:
3143  SourceRange BraceRange;
3144 
3145  // A struct representing syntactic qualifier info,
3146  // to be used for the (uncommon) case of out-of-line declarations.
3147  using ExtInfo = QualifierInfo;
3148 
3149  /// If the (out-of-line) tag declaration name
3150  /// is qualified, it points to the qualifier info (nns and range);
3151  /// otherwise, if the tag declaration is anonymous and it is part of
3152  /// a typedef or alias, it points to the TypedefNameDecl (used for mangling);
3153  /// otherwise, if the tag declaration is anonymous and it is used as a
3154  /// declaration specifier for variables, it points to the first VarDecl (used
3155  /// for mangling);
3156  /// otherwise, it is a null (TypedefNameDecl) pointer.
3157  llvm::PointerUnion<TypedefNameDecl *, ExtInfo *> TypedefNameDeclOrQualifier;
3158 
3159  bool hasExtInfo() const { return TypedefNameDeclOrQualifier.is<ExtInfo *>(); }
3160  ExtInfo *getExtInfo() { return TypedefNameDeclOrQualifier.get<ExtInfo *>(); }
3161  const ExtInfo *getExtInfo() const {
3162  return TypedefNameDeclOrQualifier.get<ExtInfo *>();
3163  }
3164 
3165 protected:
3166  TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC,
3167  SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl,
3168  SourceLocation StartL);
3169 
3171 
3173  return getNextRedeclaration();
3174  }
3175 
3177  return getPreviousDecl();
3178  }
3179 
3181  return getMostRecentDecl();
3182  }
3183 
3184  /// Completes the definition of this tag declaration.
3185  ///
3186  /// This is a helper function for derived classes.
3187  void completeDefinition();
3188 
3189  /// True if this decl is currently being defined.
3190  void setBeingDefined(bool V = true) { TagDeclBits.IsBeingDefined = V; }
3191 
3192  /// Indicates whether it is possible for declarations of this kind
3193  /// to have an out-of-date definition.
3194  ///
3195  /// This option is only enabled when modules are enabled.
3196  void setMayHaveOutOfDateDef(bool V = true) {
3197  TagDeclBits.MayHaveOutOfDateDef = V;
3198  }
3199 
3200 public:
3201  friend class ASTDeclReader;
3202  friend class ASTDeclWriter;
3203 
3205  using redecl_iterator = redeclarable_base::redecl_iterator;
3206 
3207  using redeclarable_base::redecls_begin;
3208  using redeclarable_base::redecls_end;
3209  using redeclarable_base::redecls;
3210  using redeclarable_base::getPreviousDecl;
3211  using redeclarable_base::getMostRecentDecl;
3212  using redeclarable_base::isFirstDecl;
3213 
3214  SourceRange getBraceRange() const { return BraceRange; }
3215  void setBraceRange(SourceRange R) { BraceRange = R; }
3216 
3217  /// Return SourceLocation representing start of source
3218  /// range ignoring outer template declarations.
3219  SourceLocation getInnerLocStart() const { return getBeginLoc(); }
3220 
3221  /// Return SourceLocation representing start of source
3222  /// range taking into account any outer template declarations.
3223  SourceLocation getOuterLocStart() const;
3224  SourceRange getSourceRange() const override LLVM_READONLY;
3225 
3226  TagDecl *getCanonicalDecl() override;
3227  const TagDecl *getCanonicalDecl() const {
3228  return const_cast<TagDecl*>(this)->getCanonicalDecl();
3229  }
3230 
3231  /// Return true if this declaration is a completion definition of the type.
3232  /// Provided for consistency.
3234  return isCompleteDefinition();
3235  }
3236 
3237  /// Return true if this decl has its body fully specified.
3238  bool isCompleteDefinition() const { return TagDeclBits.IsCompleteDefinition; }
3239 
3240  /// True if this decl has its body fully specified.
3241  void setCompleteDefinition(bool V = true) {
3242  TagDeclBits.IsCompleteDefinition = V;
3243  }
3244 
3245  /// Return true if this complete decl is
3246  /// required to be complete for some existing use.
3248  return TagDeclBits.IsCompleteDefinitionRequired;
3249  }
3250 
3251  /// True if this complete decl is
3252  /// required to be complete for some existing use.
3253  void setCompleteDefinitionRequired(bool V = true) {
3254  TagDeclBits.IsCompleteDefinitionRequired = V;
3255  }
3256 
3257  /// Return true if this decl is currently being defined.
3258  bool isBeingDefined() const { return TagDeclBits.IsBeingDefined; }
3259 
3260  /// True if this tag declaration is "embedded" (i.e., defined or declared
3261  /// for the very first time) in the syntax of a declarator.
3262  bool isEmbeddedInDeclarator() const {
3263  return TagDeclBits.IsEmbeddedInDeclarator;
3264  }
3265 
3266  /// True if this tag declaration is "embedded" (i.e., defined or declared
3267  /// for the very first time) in the syntax of a declarator.
3268  void setEmbeddedInDeclarator(bool isInDeclarator) {
3269  TagDeclBits.IsEmbeddedInDeclarator = isInDeclarator;
3270  }
3271 
3272  /// True if this tag is free standing, e.g. "struct foo;".
3273  bool isFreeStanding() const { return TagDeclBits.IsFreeStanding; }
3274 
3275  /// True if this tag is free standing, e.g. "struct foo;".
3276  void setFreeStanding(bool isFreeStanding = true) {
3277  TagDeclBits.IsFreeStanding = isFreeStanding;
3278  }
3279 
3280  /// Indicates whether it is possible for declarations of this kind
3281  /// to have an out-of-date definition.
3282  ///
3283  /// This option is only enabled when modules are enabled.
3284  bool mayHaveOutOfDateDef() const { return TagDeclBits.MayHaveOutOfDateDef; }
3285 
3286  /// Whether this declaration declares a type that is
3287  /// dependent, i.e., a type that somehow depends on template
3288  /// parameters.
3289  bool isDependentType() const { return isDependentContext(); }
3290 
3291  /// Starts the definition of this tag declaration.
3292  ///
3293  /// This method should be invoked at the beginning of the definition
3294  /// of this tag declaration. It will set the tag type into a state
3295  /// where it is in the process of being defined.
3296  void startDefinition();
3297 
3298  /// Returns the TagDecl that actually defines this
3299  /// struct/union/class/enum. When determining whether or not a
3300  /// struct/union/class/enum has a definition, one should use this
3301  /// method as opposed to 'isDefinition'. 'isDefinition' indicates
3302  /// whether or not a specific TagDecl is defining declaration, not
3303  /// whether or not the struct/union/class/enum type is defined.
3304  /// This method returns NULL if there is no TagDecl that defines
3305  /// the struct/union/class/enum.
3306  TagDecl *getDefinition() const;
3307 
3308  StringRef getKindName() const {
3309  return TypeWithKeyword::getTagTypeKindName(getTagKind());
3310  }
3311 
3313  return static_cast<TagKind>(TagDeclBits.TagDeclKind);
3314  }
3315 
3316  void setTagKind(TagKind TK) { TagDeclBits.TagDeclKind = TK; }
3317 
3318  bool isStruct() const { return getTagKind() == TTK_Struct; }
3319  bool isInterface() const { return getTagKind() == TTK_Interface; }
3320  bool isClass() const { return getTagKind() == TTK_Class; }
3321  bool isUnion() const { return getTagKind() == TTK_Union; }
3322  bool isEnum() const { return getTagKind() == TTK_Enum; }
3323 
3324  /// Is this tag type named, either directly or via being defined in
3325  /// a typedef of this type?
3326  ///
3327  /// C++11 [basic.link]p8:
3328  /// A type is said to have linkage if and only if:
3329  /// - it is a class or enumeration type that is named (or has a
3330  /// name for linkage purposes) and the name has linkage; ...
3331  /// C++11 [dcl.typedef]p9:
3332  /// If the typedef declaration defines an unnamed class (or enum),
3333  /// the first typedef-name declared by the declaration to be that
3334  /// class type (or enum type) is used to denote the class type (or
3335  /// enum type) for linkage purposes only.
3336  ///
3337  /// C does not have an analogous rule, but the same concept is
3338  /// nonetheless useful in some places.
3339  bool hasNameForLinkage() const {
3340  return (getDeclName() || getTypedefNameForAnonDecl());
3341  }
3342 
3344  return hasExtInfo() ? nullptr
3345  : TypedefNameDeclOrQualifier.get<TypedefNameDecl *>();
3346  }
3347 
3349 
3350  /// Retrieve the nested-name-specifier that qualifies the name of this
3351  /// declaration, if it was present in the source.
3353  return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier()
3354  : nullptr;
3355  }
3356 
3357  /// Retrieve the nested-name-specifier (with source-location
3358  /// information) that qualifies the name of this declaration, if it was
3359  /// present in the source.
3361  return hasExtInfo() ? getExtInfo()->QualifierLoc
3363  }
3364 
3365  void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc);
3366 
3367  unsigned getNumTemplateParameterLists() const {
3368  return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0;
3369  }
3370 
3372  assert(i < getNumTemplateParameterLists());
3373  return getExtInfo()->TemplParamLists[i];
3374  }
3375 
3376  void setTemplateParameterListsInfo(ASTContext &Context,
3378 
3379  // Implement isa/cast/dyncast/etc.
3380  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3381  static bool classofKind(Kind K) { return K >= firstTag && K <= lastTag; }
3382 
3384  return static_cast<DeclContext *>(const_cast<TagDecl*>(D));
3385  }
3386 
3388  return static_cast<TagDecl *>(const_cast<DeclContext*>(DC));
3389  }
3390 };
3391 
3392 /// Represents an enum. In C++11, enums can be forward-declared
3393 /// with a fixed underlying type, and in C we allow them to be forward-declared
3394 /// with no underlying type as an extension.
3395 class EnumDecl : public TagDecl {
3396  // This class stores some data in DeclContext::EnumDeclBits
3397  // to save some space. Use the provided accessors to access it.
3398 
3399  /// This represent the integer type that the enum corresponds
3400  /// to for code generation purposes. Note that the enumerator constants may
3401  /// have a different type than this does.
3402  ///
3403  /// If the underlying integer type was explicitly stated in the source
3404  /// code, this is a TypeSourceInfo* for that type. Otherwise this type
3405  /// was automatically deduced somehow, and this is a Type*.
3406  ///
3407  /// Normally if IsFixed(), this would contain a TypeSourceInfo*, but in
3408  /// some cases it won't.
3409  ///
3410  /// The underlying type of an enumeration never has any qualifiers, so
3411  /// we can get away with just storing a raw Type*, and thus save an
3412  /// extra pointer when TypeSourceInfo is needed.
3413  llvm::PointerUnion<const Type *, TypeSourceInfo *> IntegerType;
3414 
3415  /// The integer type that values of this type should
3416  /// promote to. In C, enumerators are generally of an integer type
3417  /// directly, but gcc-style large enumerators (and all enumerators
3418  /// in C++) are of the enum type instead.
3419  QualType PromotionType;
3420 
3421  /// If this enumeration is an instantiation of a member enumeration
3422  /// of a class template specialization, this is the member specialization
3423  /// information.
3424  MemberSpecializationInfo *SpecializationInfo = nullptr;
3425 
3426  /// Store the ODRHash after first calculation.
3427  /// The corresponding flag HasODRHash is in EnumDeclBits
3428  /// and can be accessed with the provided accessors.
3429  unsigned ODRHash;
3430 
3431  EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
3432  SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl,
3433  bool Scoped, bool ScopedUsingClassTag, bool Fixed);
3434 
3435  void anchor() override;
3436 
3437  void setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
3439 
3440  /// Sets the width in bits required to store all the
3441  /// non-negative enumerators of this enum.
3442  void setNumPositiveBits(unsigned Num) {
3443  EnumDeclBits.NumPositiveBits = Num;
3444  assert(EnumDeclBits.NumPositiveBits == Num && "can't store this bitcount");
3445  }
3446 
3447  /// Returns the width in bits required to store all the
3448  /// negative enumerators of this enum. (see getNumNegativeBits)
3449  void setNumNegativeBits(unsigned Num) { EnumDeclBits.NumNegativeBits = Num; }
3450 
3451  /// True if this tag declaration is a scoped enumeration. Only
3452  /// possible in C++11 mode.
3453  void setScoped(bool Scoped = true) { EnumDeclBits.IsScoped = Scoped; }
3454 
3455  /// If this tag declaration is a scoped enum,
3456  /// then this is true if the scoped enum was declared using the class
3457  /// tag, false if it was declared with the struct tag. No meaning is
3458  /// associated if this tag declaration is not a scoped enum.
3459  void setScopedUsingClassTag(bool ScopedUCT = true) {
3460  EnumDeclBits.IsScopedUsingClassTag = ScopedUCT;
3461  }
3462 
3463  /// True if this is an Objective-C, C++11, or
3464  /// Microsoft-style enumeration with a fixed underlying type.
3465  void setFixed(bool Fixed = true) { EnumDeclBits.IsFixed = Fixed; }
3466 
3467  /// True if a valid hash is stored in ODRHash.
3468  bool hasODRHash() const { return EnumDeclBits.HasODRHash; }
3469  void setHasODRHash(bool Hash = true) { EnumDeclBits.HasODRHash = Hash; }
3470 
3471 public:
3472  friend class ASTDeclReader;
3473 
3475  return cast<EnumDecl>(TagDecl::getCanonicalDecl());
3476  }
3477  const EnumDecl *getCanonicalDecl() const {
3478  return const_cast<EnumDecl*>(this)->getCanonicalDecl();
3479  }
3480 
3482  return cast_or_null<EnumDecl>(
3483  static_cast<TagDecl *>(this)->getPreviousDecl());
3484  }
3485  const EnumDecl *getPreviousDecl() const {
3486  return const_cast<EnumDecl*>(this)->getPreviousDecl();
3487  }
3488 
3490  return cast<EnumDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl());
3491  }
3492  const EnumDecl *getMostRecentDecl() const {
3493  return const_cast<EnumDecl*>(this)->getMostRecentDecl();
3494  }
3495 
3497  return cast_or_null<EnumDecl>(TagDecl::getDefinition());
3498  }
3499 
3500  static EnumDecl *Create(ASTContext &C, DeclContext *DC,
3501  SourceLocation StartLoc, SourceLocation IdLoc,
3502  IdentifierInfo *Id, EnumDecl *PrevDecl,
3503  bool IsScoped, bool IsScopedUsingClassTag,
3504  bool IsFixed);
3505  static EnumDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3506 
3507  /// When created, the EnumDecl corresponds to a
3508  /// forward-declared enum. This method is used to mark the
3509  /// declaration as being defined; its enumerators have already been
3510  /// added (via DeclContext::addDecl). NewType is the new underlying
3511  /// type of the enumeration type.
3512  void completeDefinition(QualType NewType,
3513  QualType PromotionType,
3514  unsigned NumPositiveBits,
3515  unsigned NumNegativeBits);
3516 
3517  // Iterates through the enumerators of this enumeration.
3519  using enumerator_range =
3520  llvm::iterator_range<specific_decl_iterator<EnumConstantDecl>>;
3521 
3523  return enumerator_range(enumerator_begin(), enumerator_end());
3524  }
3525 
3527  const EnumDecl *E = getDefinition();
3528  if (!E)
3529  E = this;
3530  return enumerator_iterator(E->decls_begin());
3531  }
3532 
3534  const EnumDecl *E = getDefinition();
3535  if (!E)
3536  E = this;
3537  return enumerator_iterator(E->decls_end());
3538  }
3539 
3540  /// Return the integer type that enumerators should promote to.
3541  QualType getPromotionType() const { return PromotionType; }
3542 
3543  /// Set the promotion type.
3544  void setPromotionType(QualType T) { PromotionType = T; }
3545 
3546  /// Return the integer type this enum decl corresponds to.
3547  /// This returns a null QualType for an enum forward definition with no fixed
3548  /// underlying type.
3550  if (!IntegerType)
3551  return QualType();
3552  if (const Type *T = IntegerType.dyn_cast<const Type*>())
3553  return QualType(T, 0);
3554  return IntegerType.get<TypeSourceInfo*>()->getType().getUnqualifiedType();
3555  }
3556 
3557  /// Set the underlying integer type.
3558  void setIntegerType(QualType T) { IntegerType = T.getTypePtrOrNull(); }
3559 
3560  /// Set the underlying integer type source info.
3561  void setIntegerTypeSourceInfo(TypeSourceInfo *TInfo) { IntegerType = TInfo; }
3562 
3563  /// Return the type source info for the underlying integer type,
3564  /// if no type source info exists, return 0.
3566  return IntegerType.dyn_cast<TypeSourceInfo*>();
3567  }
3568 
3569  /// Retrieve the source range that covers the underlying type if
3570  /// specified.
3571  SourceRange getIntegerTypeRange() const LLVM_READONLY;
3572 
3573  /// Returns the width in bits required to store all the
3574  /// non-negative enumerators of this enum.
3575  unsigned getNumPositiveBits() const { return EnumDeclBits.NumPositiveBits; }
3576 
3577  /// Returns the width in bits required to store all the
3578  /// negative enumerators of this enum. These widths include
3579  /// the rightmost leading 1; that is:
3580  ///
3581  /// MOST NEGATIVE ENUMERATOR PATTERN NUM NEGATIVE BITS
3582  /// ------------------------ ------- -----------------
3583  /// -1 1111111 1
3584  /// -10 1110110 5
3585  /// -101 1001011 8
3586  unsigned getNumNegativeBits() const { return EnumDeclBits.NumNegativeBits; }
3587 
3588  /// Returns true if this is a C++11 scoped enumeration.
3589  bool isScoped() const { return EnumDeclBits.IsScoped; }
3590 
3591  /// Returns true if this is a C++11 scoped enumeration.
3592  bool isScopedUsingClassTag() const {
3593  return EnumDeclBits.IsScopedUsingClassTag;
3594  }
3595 
3596  /// Returns true if this is an Objective-C, C++11, or
3597  /// Microsoft-style enumeration with a fixed underlying type.
3598  bool isFixed() const { return EnumDeclBits.IsFixed; }
3599 
3600  unsigned getODRHash();
3601 
3602  /// Returns true if this can be considered a complete type.
3603  bool isComplete() const {
3604  // IntegerType is set for fixed type enums and non-fixed but implicitly
3605  // int-sized Microsoft enums.
3606  return isCompleteDefinition() || IntegerType;
3607  }
3608 
3609  /// Returns true if this enum is either annotated with
3610  /// enum_extensibility(closed) or isn't annotated with enum_extensibility.
3611  bool isClosed() const;
3612 
3613  /// Returns true if this enum is annotated with flag_enum and isn't annotated
3614  /// with enum_extensibility(open).
3615  bool isClosedFlag() const;
3616 
3617  /// Returns true if this enum is annotated with neither flag_enum nor
3618  /// enum_extensibility(open).
3619  bool isClosedNonFlag() const;
3620 
3621  /// Retrieve the enum definition from which this enumeration could
3622  /// be instantiated, if it is an instantiation (rather than a non-template).
3623  EnumDecl *getTemplateInstantiationPattern() const;
3624 
3625  /// Returns the enumeration (declared within the template)
3626  /// from which this enumeration type was instantiated, or NULL if
3627  /// this enumeration was not instantiated from any template.
3628  EnumDecl *getInstantiatedFromMemberEnum() const;
3629 
3630  /// If this enumeration is a member of a specialization of a
3631  /// templated class, determine what kind of template specialization
3632  /// or instantiation this is.
3634 
3635  /// For an enumeration member that was instantiated from a member
3636  /// enumeration of a templated class, set the template specialiation kind.
3637  void setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3638  SourceLocation PointOfInstantiation = SourceLocation());
3639 
3640  /// If this enumeration is an instantiation of a member enumeration of
3641  /// a class template specialization, retrieves the member specialization
3642  /// information.
3643  MemberSpecializationInfo *getMemberSpecializationInfo() const {
3644  return SpecializationInfo;
3645  }
3646 
3647  /// Specify that this enumeration is an instantiation of the
3648  /// member enumeration ED.
3651  setInstantiationOfMemberEnum(getASTContext(), ED, TSK);
3652  }
3653 
3654  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3655  static bool classofKind(Kind K) { return K == Enum; }
3656 };
3657 
3658 /// Represents a struct/union/class. For example:
3659 /// struct X; // Forward declaration, no "body".
3660 /// union Y { int A, B; }; // Has body with members A and B (FieldDecls).
3661 /// This decl will be marked invalid if *any* members are invalid.
3662 class RecordDecl : public TagDecl {
3663  // This class stores some data in DeclContext::RecordDeclBits
3664  // to save some space. Use the provided accessors to access it.
3665 public:
3666  friend class DeclContext;
3667  /// Enum that represents the different ways arguments are passed to and
3668  /// returned from function calls. This takes into account the target-specific
3669  /// and version-specific rules along with the rules determined by the
3670  /// language.
3671  enum ArgPassingKind : unsigned {
3672  /// The argument of this type can be passed directly in registers.
3674 
3675  /// The argument of this type cannot be passed directly in registers.
3676  /// Records containing this type as a subobject are not forced to be passed
3677  /// indirectly. This value is used only in C++. This value is required by
3678  /// C++ because, in uncommon situations, it is possible for a class to have
3679  /// only trivial copy/move constructors even when one of its subobjects has
3680  /// a non-trivial copy/move constructor (if e.g. the corresponding copy/move
3681  /// constructor in the derived class is deleted).
3683 
3684  /// The argument of this type cannot be passed directly in registers.
3685  /// Records containing this type as a subobject are forced to be passed
3686  /// indirectly.
3687  APK_CanNeverPassInRegs
3688  };
3689 
3690 protected:
3691  RecordDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC,
3692  SourceLocation StartLoc, SourceLocation IdLoc,
3693  IdentifierInfo *Id, RecordDecl *PrevDecl);
3694 
3695 public:
3696  static RecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
3697  SourceLocation StartLoc, SourceLocation IdLoc,
3698  IdentifierInfo *Id, RecordDecl* PrevDecl = nullptr);
3699  static RecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);
3700 
3702  return cast_or_null<RecordDecl>(
3703  static_cast<TagDecl *>(this)->getPreviousDecl());
3704  }
3705  const RecordDecl *getPreviousDecl() const {
3706  return const_cast<RecordDecl*>(this)->getPreviousDecl();
3707  }
3708 
3710  return cast<RecordDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl());
3711  }
3713  return const_cast<RecordDecl*>(this)->getMostRecentDecl();
3714  }
3715 
3716  bool hasFlexibleArrayMember() const {
3717  return RecordDeclBits.HasFlexibleArrayMember;
3718  }
3719 
3721  RecordDeclBits.HasFlexibleArrayMember = V;
3722  }
3723 
3724  /// Whether this is an anonymous struct or union. To be an anonymous
3725  /// struct or union, it must have been declared without a name and
3726  /// there must be no objects of this type declared, e.g.,
3727  /// @code
3728  /// union { int i; float f; };
3729  /// @endcode
3730  /// is an anonymous union but neither of the following are:
3731  /// @code
3732  /// union X { int i; float f; };
3733  /// union { int i; float f; } obj;
3734  /// @endcode
3736  return RecordDeclBits.AnonymousStructOrUnion;
3737  }
3738 
3739  void setAnonymousStructOrUnion(bool Anon) {
3740  RecordDeclBits.AnonymousStructOrUnion = Anon;
3741  }
3742 
3743  bool hasObjectMember() const { return RecordDeclBits.HasObjectMember; }
3744  void setHasObjectMember(bool val) { RecordDeclBits.HasObjectMember = val; }
3745 
3746  bool hasVolatileMember() const { return RecordDeclBits.HasVolatileMember; }
3747 
3748  void setHasVolatileMember(bool val) {
3749  RecordDeclBits.HasVolatileMember = val;
3750  }
3751 
3753  return RecordDeclBits.LoadedFieldsFromExternalStorage;
3754  }
3755 
3757  RecordDeclBits.LoadedFieldsFromExternalStorage = val;
3758  }
3759 
3760  /// Functions to query basic properties of non-trivial C structs.
3762  return RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize;
3763  }
3764 
3766  RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize = V;
3767  }
3768 
3770  return RecordDeclBits.NonTrivialToPrimitiveCopy;
3771  }
3772 
3774  RecordDeclBits.NonTrivialToPrimitiveCopy = V;
3775  }
3776 
3778  return RecordDeclBits.NonTrivialToPrimitiveDestroy;
3779  }
3780 
3782  RecordDeclBits.NonTrivialToPrimitiveDestroy = V;
3783  }
3784 
3786  return RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion;
3787  }
3788 
3790  RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion = V;
3791  }
3792 
3794  return RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion;
3795  }
3796 
3798  RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion = V;
3799  }
3800 
3802  return RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion;
3803  }
3804 
3806  RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion = V;
3807  }
3808 
3809  /// Determine whether this class can be passed in registers. In C++ mode,
3810  /// it must have at least one trivial, non-deleted copy or move constructor.
3811  /// FIXME: This should be set as part of completeDefinition.
3812  bool canPassInRegisters() const {
3813  return getArgPassingRestrictions() == APK_CanPassInRegs;
3814  }
3815 
3817  return static_cast<ArgPassingKind>(RecordDeclBits.ArgPassingRestrictions);
3818  }
3819 
3821  RecordDeclBits.ArgPassingRestrictions = Kind;
3822  }
3823 
3825  return RecordDeclBits.ParamDestroyedInCallee;
3826  }
3827 
3829  RecordDeclBits.ParamDestroyedInCallee = V;
3830  }
3831 
3832  /// Determines whether this declaration represents the
3833  /// injected class name.
3834  ///
3835  /// The injected class name in C++ is the name of the class that
3836  /// appears inside the class itself. For example:
3837  ///
3838  /// \code
3839  /// struct C {
3840  /// // C is implicitly declared here as a synonym for the class name.
3841  /// };
3842  ///
3843  /// C::C c; // same as "C c;"
3844  /// \endcode
3845  bool isInjectedClassName() const;
3846 
3847  /// Determine whether this record is a class describing a lambda
3848  /// function object.
3849  bool isLambda() const;
3850 
3851  /// Determine whether this record is a record for captured variables in
3852  /// CapturedStmt construct.
3853  bool isCapturedRecord() const;
3854 
3855  /// Mark the record as a record for captured variables in CapturedStmt
3856  /// construct.
3857  void setCapturedRecord();
3858 
3859  /// Returns the RecordDecl that actually defines
3860  /// this struct/union/class. When determining whether or not a
3861  /// struct/union/class is completely defined, one should use this
3862  /// method as opposed to 'isCompleteDefinition'.
3863  /// 'isCompleteDefinition' indicates whether or not a specific
3864  /// RecordDecl is a completed definition, not whether or not the
3865  /// record type is defined. This method returns NULL if there is
3866  /// no RecordDecl that defines the struct/union/tag.
3868  return cast_or_null<RecordDecl>(TagDecl::getDefinition());
3869  }
3870 
3871  // Iterator access to field members. The field iterator only visits
3872  // the non-static data members of this class, ignoring any static
3873  // data members, functions, constructors, destructors, etc.
3875  using field_range = llvm::iterator_range<specific_decl_iterator<FieldDecl>>;
3876 
3877  field_range fields() const { return field_range(field_begin(), field_end()); }
3878  field_iterator field_begin() const;
3879 
3881  return field_iterator(decl_iterator());
3882  }
3883 
3884  // Whether there are any fields (non-static data members) in this record.
3885  bool field_empty() const {
3886  return field_begin() == field_end();
3887  }
3888 
3889  /// Note that the definition of this type is now complete.
3890  virtual void completeDefinition();
3891 
3892  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3893  static bool classofKind(Kind K) {
3894  return K >= firstRecord && K <= lastRecord;
3895  }
3896 
3897  /// Get whether or not this is an ms_struct which can
3898  /// be turned on with an attribute, pragma, or -mms-bitfields
3899  /// commandline option.
3900  bool isMsStruct(const ASTContext &C) const;
3901 
3902  /// Whether we are allowed to insert extra padding between fields.
3903  /// These padding are added to help AddressSanitizer detect
3904  /// intra-object-overflow bugs.
3905  bool mayInsertExtraPadding(bool EmitRemark = false) const;
3906 
3907  /// Finds the first data member which has a name.
3908  /// nullptr is returned if no named data member exists.
3909  const FieldDecl *findFirstNamedDataMember() const;
3910 
3911 private:
3912  /// Deserialize just the fields.
3913  void LoadFieldsFromExternalStorage() const;
3914 };
3915 
3916 class FileScopeAsmDecl : public Decl {
3917  StringLiteral *AsmString;
3918  SourceLocation RParenLoc;
3919 
3920  FileScopeAsmDecl(DeclContext *DC, StringLiteral *asmstring,
3921  SourceLocation StartL, SourceLocation EndL)
3922  : Decl(FileScopeAsm, DC, StartL), AsmString(asmstring), RParenLoc(EndL) {}
3923 
3924  virtual void anchor();
3925 
3926 public:
3928  StringLiteral *Str, SourceLocation AsmLoc,
3929  SourceLocation RParenLoc);
3930 
3931  static FileScopeAsmDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3932 
3933  SourceLocation getAsmLoc() const { return getLocation(); }
3934  SourceLocation getRParenLoc() const { return RParenLoc; }
3935  void setRParenLoc(SourceLocation L) { RParenLoc = L; }
3936  SourceRange getSourceRange() const override LLVM_READONLY {
3937  return SourceRange(getAsmLoc(), getRParenLoc());
3938  }
3939 
3940  const StringLiteral *getAsmString() const { return AsmString; }
3941  StringLiteral *getAsmString() { return AsmString; }
3942  void setAsmString(StringLiteral *Asm) { AsmString = Asm; }
3943 
3944  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3945  static bool classofKind(Kind K) { return K == FileScopeAsm; }
3946 };
3947 
3948 /// Represents a block literal declaration, which is like an
3949 /// unnamed FunctionDecl. For example:
3950 /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body }
3951 class BlockDecl : public Decl, public DeclContext {
3952  // This class stores some data in DeclContext::BlockDeclBits
3953  // to save some space. Use the provided accessors to access it.
3954 public:
3955  /// A class which contains all the information about a particular
3956  /// captured value.
3957  class Capture {
3958  enum {
3959  flag_isByRef = 0x1,
3960  flag_isNested = 0x2
3961  };
3962 
3963  /// The variable being captured.
3964  llvm::PointerIntPair<VarDecl*, 2> VariableAndFlags;
3965 
3966  /// The copy expression, expressed in terms of a DeclRef (or
3967  /// BlockDeclRef) to the captured variable. Only required if the
3968  /// variable has a C++ class type.
3969  Expr *CopyExpr;
3970 
3971  public:
3972  Capture(VarDecl *variable, bool byRef, bool nested, Expr *copy)
3973  : VariableAndFlags(variable,
3974  (byRef ? flag_isByRef : 0) | (nested ? flag_isNested : 0)),
3975  CopyExpr(copy) {}
3976 
3977  /// The variable being captured.
3978  VarDecl *getVariable() const { return VariableAndFlags.getPointer(); }
3979 
3980  /// Whether this is a "by ref" capture, i.e. a capture of a __block
3981  /// variable.
3982  bool isByRef() const { return VariableAndFlags.getInt() & flag_isByRef; }
3983 
3984  bool isEscapingByref() const {
3985  return getVariable()->isEscapingByref();
3986  }
3987 
3988  bool isNonEscapingByref() const {
3989  return getVariable()->isNonEscapingByref();
3990  }
3991 
3992  /// Whether this is a nested capture, i.e. the variable captured
3993  /// is not from outside the immediately enclosing function/block.
3994  bool isNested() const { return VariableAndFlags.getInt() & flag_isNested; }
3995 
3996  bool hasCopyExpr() const { return CopyExpr != nullptr; }
3997  Expr *getCopyExpr() const { return CopyExpr; }
3998  void setCopyExpr(Expr *e) { CopyExpr = e; }
3999  };
4000 
4001 private:
4002  /// A new[]'d array of pointers to ParmVarDecls for the formal
4003  /// parameters of this function. This is null if a prototype or if there are
4004  /// no formals.
4005  ParmVarDecl **ParamInfo = nullptr;
4006  unsigned NumParams = 0;
4007 
4008  Stmt *Body = nullptr;
4009  TypeSourceInfo *SignatureAsWritten = nullptr;
4010 
4011  const Capture *Captures = nullptr;
4012  unsigned NumCaptures = 0;
4013 
4014  unsigned ManglingNumber = 0;
4015  Decl *ManglingContextDecl = nullptr;
4016 
4017 protected:
4018  BlockDecl(DeclContext *DC, SourceLocation CaretLoc);
4019 
4020 public:
4022  static BlockDecl *CreateDeserialized(ASTContext &C, unsigned ID);
4023 
4024  SourceLocation getCaretLocation() const { return getLocation(); }
4025 
4026  bool isVariadic() const { return BlockDeclBits.IsVariadic; }
4027  void setIsVariadic(bool value) { BlockDeclBits.IsVariadic = value; }
4028 
4029  CompoundStmt *getCompoundBody() const { return (CompoundStmt*) Body; }
4030  Stmt *getBody() const override { return (Stmt*) Body; }
4031  void setBody(CompoundStmt *B) { Body = (Stmt*) B; }
4032 
4033  void setSignatureAsWritten(TypeSourceInfo *Sig) { SignatureAsWritten = Sig; }
4034  TypeSourceInfo *getSignatureAsWritten() const { return SignatureAsWritten; }
4035 
4036  // ArrayRef access to formal parameters.
4038  return {ParamInfo, getNumParams()};
4039  }
4041  return {ParamInfo, getNumParams()};
4042  }
4043 
4044  // Iterator access to formal parameters.
4047 
4048  bool param_empty() const { return parameters().empty(); }
4049  param_iterator param_begin() { return parameters().begin(); }
4050  param_iterator param_end() { return parameters().end(); }
4051  param_const_iterator param_begin() const { return parameters().begin(); }
4052  param_const_iterator param_end() const { return parameters().end(); }
4053  size_t param_size() const { return parameters().size(); }
4054 
4055  unsigned getNumParams() const { return NumParams; }
4056 
4057  const ParmVarDecl *getParamDecl(unsigned i) const {
4058  assert(i < getNumParams() && "Illegal param #");
4059  return ParamInfo[i];
4060  }
4061  ParmVarDecl *getParamDecl(unsigned i) {
4062  assert(i < getNumParams() && "Illegal param #");
4063  return ParamInfo[i];
4064  }
4065 
4066  void setParams(ArrayRef<ParmVarDecl *> NewParamInfo);
4067 
4068  /// True if this block (or its nested blocks) captures
4069  /// anything of local storage from its enclosing scopes.
4070  bool hasCaptures() const { return NumCaptures || capturesCXXThis(); }
4071 
4072  /// Returns the number of captured variables.
4073  /// Does not include an entry for 'this'.
4074  unsigned getNumCaptures() const { return NumCaptures; }
4075 
4077 
4078  ArrayRef<Capture> captures() const { return {Captures, NumCaptures}; }
4079 
4080  capture_const_iterator capture_begin() const { return captures().begin(); }
4081  capture_const_iterator capture_end() const { return captures().end(); }
4082 
4083  bool capturesCXXThis() const { return BlockDeclBits.CapturesCXXThis; }
4084  void setCapturesCXXThis(bool B = true) { BlockDeclBits.CapturesCXXThis = B; }
4085 
4086  bool blockMissingReturnType() const {
4087  return BlockDeclBits.BlockMissingReturnType;
4088  }
4089 
4090  void setBlockMissingReturnType(bool val = true) {
4091  BlockDeclBits.BlockMissingReturnType = val;
4092  }
4093 
4094  bool isConversionFromLambda() const {
4095  return BlockDeclBits.IsConversionFromLambda;
4096  }
4097 
4098  void setIsConversionFromLambda(bool val = true) {
4099  BlockDeclBits.IsConversionFromLambda = val;
4100  }
4101 
4102  bool doesNotEscape() const { return BlockDeclBits.DoesNotEscape; }
4103  void setDoesNotEscape(bool B = true) { BlockDeclBits.DoesNotEscape = B; }
4104 
4105  bool canAvoidCopyToHeap() const {
4106  return BlockDeclBits.CanAvoidCopyToHeap;
4107  }
4108  void setCanAvoidCopyToHeap(bool B = true) {
4109  BlockDeclBits.CanAvoidCopyToHeap = B;
4110  }
4111 
4112  bool capturesVariable(const VarDecl *var) const;
4113 
4114  void setCaptures(ASTContext &Context, ArrayRef<Capture> Captures,
4115  bool CapturesCXXThis);
4116 
4117  unsigned getBlockManglingNumber() const { return ManglingNumber; }
4118 
4119  Decl *getBlockManglingContextDecl() const { return ManglingContextDecl; }
4120 
4121  void setBlockMangling(unsigned Number, Decl *Ctx) {
4122  ManglingNumber = Number;
4123  ManglingContextDecl = Ctx;
4124  }
4125 
4126  SourceRange getSourceRange() const override LLVM_READONLY;
4127 
4128  // Implement isa/cast/dyncast/etc.
4129  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4130  static bool classofKind(Kind K) { return K == Block; }
4132  return static_cast<DeclContext *>(const_cast<BlockDecl*>(D));
4133  }
4135  return static_cast<BlockDecl *>(const_cast<DeclContext*>(DC));
4136  }
4137 };
4138 
4139 /// Represents the body of a CapturedStmt, and serves as its DeclContext.
4140 class CapturedDecl final
4141  : public Decl,
4142  public DeclContext,
4143  private llvm::TrailingObjects<CapturedDecl, ImplicitParamDecl *> {
4144 protected:
4145  size_t numTrailingObjects(OverloadToken<ImplicitParamDecl>) {
4146  return NumParams;
4147  }
4148 
4149 private:
4150  /// The number of parameters to the outlined function.
4151  unsigned NumParams;
4152 
4153  /// The position of context parameter in list of parameters.
4154  unsigned ContextParam;
4155 
4156  /// The body of the outlined function.
4157  llvm::PointerIntPair<Stmt *, 1, bool> BodyAndNothrow;
4158 
4159  explicit CapturedDecl(DeclContext *DC, unsigned NumParams);
4160 
4161  ImplicitParamDecl *const *getParams() const {
4162  return getTrailingObjects<ImplicitParamDecl *>();
4163  }
4164 
4165  ImplicitParamDecl **getParams() {
4166  return getTrailingObjects<ImplicitParamDecl *>();
4167  }
4168 
4169 public:
4170  friend class ASTDeclReader;
4171  friend class ASTDeclWriter;
4173 
4174  static CapturedDecl *Create(ASTContext &C, DeclContext *DC,
4175  unsigned NumParams);
4176  static CapturedDecl *CreateDeserialized(ASTContext &C, unsigned ID,
4177  unsigned NumParams);
4178 
4179  Stmt *getBody() const override;
4180  void setBody(Stmt *B);
4181 
4182  bool isNothrow() const;
4183  void setNothrow(bool Nothrow = true);
4184 
4185  unsigned getNumParams() const { return NumParams; }
4186 
4187  ImplicitParamDecl *getParam(unsigned i) const {
4188  assert(i < NumParams);
4189  return getParams()[i];
4190  }
4191  void setParam(unsigned i, ImplicitParamDecl *P) {
4192  assert(i < NumParams);
4193  getParams()[i] = P;
4194  }
4195 
4196  // ArrayRef interface to parameters.
4198  return {getParams(), getNumParams()};
4199  }
4201  return {getParams(), getNumParams()};
4202  }
4203 
4204  /// Retrieve the parameter containing captured variables.
4206  assert(ContextParam < NumParams);
4207  return getParam(ContextParam);
4208  }
4209  void setContextParam(unsigned i, ImplicitParamDecl *P) {
4210  assert(i < NumParams);
4211  ContextParam = i;
4212  setParam(i, P);
4213  }
4214  unsigned getContextParamPosition() const { return ContextParam; }
4215 
4217  using param_range = llvm::iterator_range<param_iterator>;
4218 
4219  /// Retrieve an iterator pointing to the first parameter decl.
4220  param_iterator param_begin() const { return getParams(); }
4221  /// Retrieve an iterator one past the last parameter decl.
4222  param_iterator param_end() const { return getParams() + NumParams; }
4223 
4224  // Implement isa/cast/dyncast/etc.
4225  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4226  static bool classofKind(Kind K) { return K == Captured; }
4228  return static_cast<DeclContext *>(const_cast<CapturedDecl *>(D));
4229  }
4231  return static_cast<CapturedDecl *>(const_cast<DeclContext *>(DC));
4232  }
4233 };
4234 
4235 /// Describes a module import declaration, which makes the contents
4236 /// of the named module visible in the current translation unit.
4237 ///
4238 /// An import declaration imports the named module (or submodule). For example:
4239 /// \code
4240 /// @import std.vector;
4241 /// \endcode
4242 ///
4243 /// Import declarations can also be implicitly generated from
4244 /// \#include/\#import directives.
4245 class ImportDecl final : public Decl,
4246  llvm::TrailingObjects<ImportDecl, SourceLocation> {
4247  friend class ASTContext;
4248  friend class ASTDeclReader;
4249  friend class ASTReader;
4250  friend TrailingObjects;
4251 
4252  /// The imported module, along with a bit that indicates whether
4253  /// we have source-location information for each identifier in the module
4254  /// name.
4255  ///
4256  /// When the bit is false, we only have a single source location for the
4257  /// end of the import declaration.
4258  llvm::PointerIntPair<Module *, 1, bool> ImportedAndComplete;
4259 
4260  /// The next import in the list of imports local to the translation
4261  /// unit being parsed (not loaded from an AST file).
4262  ImportDecl *NextLocalImport = nullptr;
4263 
4264  ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported,
4265  ArrayRef<SourceLocation> IdentifierLocs);
4266 
4267  ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported,
4268  SourceLocation EndLoc);
4269 
4270  ImportDecl(EmptyShell Empty) : Decl(Import, Empty) {}
4271 
4272 public:
4273  /// Create a new module import declaration.
4274  static ImportDecl *Create(ASTContext &C, DeclContext *DC,
4275  SourceLocation StartLoc, Module *Imported,
4276  ArrayRef<SourceLocation> IdentifierLocs);
4277 
4278  /// Create a new module import declaration for an implicitly-generated
4279  /// import.
4280  static ImportDecl *CreateImplicit(ASTContext &C, DeclContext *DC,
4281  SourceLocation StartLoc, Module *Imported,
4282  SourceLocation EndLoc);
4283 
4284  /// Create a new, deserialized module import declaration.
4285  static ImportDecl *CreateDeserialized(ASTContext &C, unsigned ID,
4286  unsigned NumLocations);
4287 
4288  /// Retrieve the module that was imported by the import declaration.
4289  Module *getImportedModule() const { return ImportedAndComplete.getPointer(); }
4290 
4291  /// Retrieves the locations of each of the identifiers that make up
4292  /// the complete module name in the import declaration.
4293  ///
4294  /// This will return an empty array if the locations of the individual
4295  /// identifiers aren't available.
4296  ArrayRef<SourceLocation> getIdentifierLocs() const;
4297 
4298  SourceRange getSourceRange() const override LLVM_READONLY;
4299 
4300  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4301  static bool classofKind(Kind K) { return K == Import; }
4302 };
4303 
4304 /// Represents a C++ Modules TS module export declaration.
4305 ///
4306 /// For example:
4307 /// \code
4308 /// export void foo();
4309 /// \endcode
4310 class ExportDecl final : public Decl, public DeclContext {
4311  virtual void anchor();
4312 
4313 private:
4314  friend class ASTDeclReader;
4315 
4316  /// The source location for the right brace (if valid).
4317  SourceLocation RBraceLoc;
4318 
4319  ExportDecl(DeclContext *DC, SourceLocation ExportLoc)
4320  : Decl(Export, DC, ExportLoc), DeclContext(Export),
4321  RBraceLoc(SourceLocation()) {}
4322 
4323 public:
4324  static ExportDecl *Create(ASTContext &C, DeclContext *DC,
4325  SourceLocation ExportLoc);
4326  static ExportDecl *CreateDeserialized(ASTContext &C, unsigned ID);
4327 
4328  SourceLocation getExportLoc() const { return getLocation(); }
4329  SourceLocation getRBraceLoc() const { return RBraceLoc; }
4330  void setRBraceLoc(SourceLocation L) { RBraceLoc = L; }
4331 
4332  bool hasBraces() const { return RBraceLoc.isValid(); }
4333 
4334  SourceLocation getEndLoc() const LLVM_READONLY {
4335  if (hasBraces())
4336  return RBraceLoc;
4337  // No braces: get the end location of the (only) declaration in context
4338  // (if present).
4339  return decls_empty() ? getLocation() : decls_begin()->getEndLoc();
4340  }
4341 
4342  SourceRange getSourceRange() const override LLVM_READONLY {
4343  return SourceRange(getLocation(), getEndLoc());
4344  }
4345 
4346  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4347  static bool classofKind(Kind K) { return K == Export; }
4349  return static_cast<DeclContext *>(const_cast<ExportDecl*>(D));
4350  }
4352  return static_cast<ExportDecl *>(const_cast<DeclContext*>(DC));
4353  }
4354 };
4355 
4356 /// Represents an empty-declaration.
4357 class EmptyDecl : public Decl {
4358  EmptyDecl(DeclContext *DC, SourceLocation L) : Decl(Empty, DC, L) {}
4359 
4360  virtual void anchor();
4361 
4362 public:
4363  static EmptyDecl *Create(ASTContext &C, DeclContext *DC,
4364  SourceLocation L);
4365  static EmptyDecl *CreateDeserialized(ASTContext &C, unsigned ID);
4366 
4367  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4368  static bool classofKind(Kind K) { return K == Empty; }
4369 };
4370 
4371 /// Insertion operator for diagnostics. This allows sending NamedDecl's
4372 /// into a diagnostic with <<.
4374  const NamedDecl* ND) {
4375  DB.AddTaggedVal(reinterpret_cast<intptr_t>(ND),
4377  return DB;
4378 }
4380  const NamedDecl* ND) {
4381  PD.AddTaggedVal(reinterpret_cast<intptr_t>(ND),
4383  return PD;
4384 }
4385 
4386 template<typename decl_type>
4387 void Redeclarable<decl_type>::setPreviousDecl(decl_type *PrevDecl) {
4388  // Note: This routine is implemented here because we need both NamedDecl
4389  // and Redeclarable to be defined.
4390  assert(RedeclLink.isFirst() &&
4391  "setPreviousDecl on a decl already in a redeclaration chain");
4392 
4393  if (PrevDecl) {
4394  // Point to previous. Make sure that this is actually the most recent
4395  // redeclaration, or we can build invalid chains. If the most recent
4396  // redeclaration is invalid, it won't be PrevDecl, but we want it anyway.
4397  First = PrevDecl->getFirstDecl();
4398  assert(First->RedeclLink.isFirst() && "Expected first");
4399  decl_type *MostRecent = First->getNextRedeclaration();
4400  RedeclLink = PreviousDeclLink(cast<decl_type>(MostRecent));
4401 
4402  // If the declaration was previously visible, a redeclaration of it remains
4403  // visible even if it wouldn't be visible by itself.
4404  static_cast<decl_type*>(this)->IdentifierNamespace |=
4405  MostRecent->getIdentifierNamespace() &
4407  } else {
4408  // Make this first.
4409  First = static_cast<decl_type*>(this);
4410  }
4411 
4412  // First one will point to this one as latest.
4413  First->RedeclLink.setLatest(static_cast<decl_type*>(this));
4414 
4415  assert(!isa<NamedDecl>(static_cast<decl_type*>(this)) ||
4416  cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid());
4417 }
4418 
4419 // Inline function definitions.
4420 
4421 /// Check if the given decl is complete.
4422 ///
4423 /// We use this function to break a cycle between the inline definitions in
4424 /// Type.h and Decl.h.
4425 inline bool IsEnumDeclComplete(EnumDecl *ED) {
4426  return ED->isComplete();
4427 }
4428 
4429 /// Check if the given decl is scoped.
4430 ///
4431 /// We use this function to break a cycle between the inline definitions in
4432 /// Type.h and Decl.h.
4433 inline bool IsEnumDeclScoped(EnumDecl *ED) {
4434  return ED->isScoped();
4435 }
4436 
4437 } // namespace clang
4438 
4439 #endif // LLVM_CLANG_AST_DECL_H
static bool classof(const Decl *D)
Definition: Decl.h:3380
static bool classofKind(Kind K)
Definition: Decl.h:4368
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.h:3936
void setHasSkippedBody(bool Skipped=true)
Definition: Decl.h:2279
FunctionDecl * getDefinition()
Get the definition for this declaration.
Definition: Decl.h:2005
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1633
void setOwningFunction(DeclContext *FD)
Sets the function declaration that owns this ParmVarDecl.
Definition: Decl.h:1740
bool hasCapturedVLAType() const
Determine whether this member captures the variable length array type.
Definition: Decl.h:2816
redeclarable_base::redecl_range redecl_range
Definition: Decl.h:3204
bool hasCopyExpr() const
Definition: Decl.h:3996
enumerator_iterator enumerator_end() const
Definition: Decl.h:3533
bool isStruct() const
Definition: Decl.h:3318
ObjCStringFormatFamily
static const Decl * getCanonicalDecl(const Decl *D)
Represents a function declaration or definition.
Definition: Decl.h:1784
bool isThisDeclarationADemotedDefinition() const
If this definition should pretend to be a declaration.
Definition: Decl.h:1324
static FunctionDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation NLoc, DeclarationName N, QualType T, TypeSourceInfo *TInfo, StorageClass SC, bool isInlineSpecified=false, bool hasWrittenPrototype=true, ConstexprSpecKind ConstexprKind=CSK_unspecified)
Definition: Decl.h:1931
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3781
Other implicit parameter.
Definition: Decl.h:1560
static bool classof(const Decl *D)
Definition: Decl.h:663
no exception specification
Expr * getCopyExpr() const
Definition: Decl.h:3997
static DeclContext * castToDeclContext(const ExternCContextDecl *D)
Definition: Decl.h:235
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3739
A class which contains all the information about a particular captured value.
Definition: Decl.h:3957
A (possibly-)qualified type.
Definition: Type.h:643
TagDecl * getDefinition() const
Returns the TagDecl that actually defines this struct/union/class/enum.
Definition: Decl.cpp:4095
Static storage duration.
Definition: Specifiers.h:310
static bool classofKind(Kind K)
Definition: Decl.h:234
void setCompleteDefinition(bool V=true)
True if this decl has its body fully specified.
Definition: Decl.h:3241
bool isOverloadedOperator() const
Whether this function declaration represents an C++ overloaded operator, e.g., "operator+".
Definition: Decl.h:2439
bool hasCaptures() const
True if this block (or its nested blocks) captures anything of local storage from its enclosing scope...
Definition: Decl.h:4070
void setMayHaveOutOfDateDef(bool V=true)
Indicates whether it is possible for declarations of this kind to have an out-of-date definition...
Definition: Decl.h:3196
static bool classofKind(Kind K)
Definition: Decl.h:463
param_iterator param_begin() const
Retrieve an iterator pointing to the first parameter decl.
Definition: Decl.h:4220
Expr * getInitExpr()
Definition: Decl.h:2875
bool isObjCMethodParameter() const
Definition: Decl.h:1643
capture_const_iterator capture_begin() const
Definition: Decl.h:4080
SourceRange getBraceRange() const
Definition: Decl.h:3214
bool willHaveBody() const
True if this function will eventually have a body, once it&#39;s fully parsed.
Definition: Decl.h:2284
const NamedDecl * getUnderlyingDecl() const
Definition: Decl.h:449
InClassInitStyle getInClassInitStyle() const
Get the kind of (C++11) default member initializer that this field has.
Definition: Decl.h:2776
VarDecl * getVarDecl() const
Definition: Decl.h:2929
redeclarable_base::redecl_iterator redecl_iterator
Definition: Decl.h:560
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3765
static TranslationUnitDecl * castFromDeclContext(const DeclContext *DC)
Definition: Decl.h:132
bool IsEnumDeclScoped(EnumDecl *ED)
Check if the given decl is scoped.
Definition: Decl.h:4433
static bool classofKind(Kind K)
Definition: Decl.h:3945
Stmt - This represents one statement.
Definition: Stmt.h:66
Expr * getBitWidth() const
Definition: Decl.h:2732
void setPreviousDecl(decl_type *PrevDecl)
Set the previous declaration.
Definition: Decl.h:4387
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3393
bool IsICE
Whether this statement is an integral constant expression, or in C++11, whether the statement is a co...
Definition: Decl.h:809
An instance of this object exists for each enum constant that is defined.
Definition: Decl.h:2855
void setEmbeddedInDeclarator(bool isInDeclarator)
True if this tag declaration is "embedded" (i.e., defined or declared for the very first time) in the...
Definition: Decl.h:3268
Represents the declaration of a typedef-name via the &#39;typedef&#39; type specifier.
Definition: Decl.h:3087
C Language Family Type Representation.
bool param_empty() const
Definition: Decl.h:4048
const EnumDecl * getCanonicalDecl() const
Definition: Decl.h:3477
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4191
bool IsEvaluating
Whether this statement is being evaluated.
Definition: Decl.h:796
bool isConstexpr() const
Whether this is a (C++11) constexpr function or constexpr constructor.
Definition: Decl.h:2144
const RecordDecl * getMostRecentDecl() const
Definition: Decl.h:3712
bool hasVolatileMember() const
Definition: Decl.h:3746
param_const_iterator param_end() const
Definition: Decl.h:4052
redeclarable_base::redecl_range redecl_range
Definition: Decl.h:1920
static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D)
Determine what kind of template specialization the given declaration is.
const Type * getTypeForDecl() const
Definition: Decl.h:2967
DeclaratorDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N, QualType T, TypeSourceInfo *TInfo, SourceLocation StartL)
Definition: Decl.h:714
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
unsigned getNumCaptures() const
Returns the number of captured variables.
Definition: Decl.h:4074
void setRangeEnd(SourceLocation E)
Definition: Decl.h:1958
redeclarable_base::redecl_iterator redecl_iterator
Definition: Decl.h:1921
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
EnumDecl * getPreviousDecl()
Definition: Decl.h:3481
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3820
ThreadStorageClassSpecifier getTSCSpec() const
Definition: Decl.h:1043
param_iterator param_end()
Definition: Decl.h:4050
StringRef P
NamedDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N)
Definition: Decl.h:260
Parameter for C++ &#39;this&#39; argument.
Definition: Decl.h:1551
bool hasWrittenPrototype() const
Whether this function has a written prototype.
Definition: Decl.h:2122
ImplicitParamKind
Defines the kind of the implicit parameter: is this an implicit parameter with pointer to &#39;this&#39;...
Definition: Decl.h:1543
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:334
unsigned getBlockManglingNumber() const
Definition: Decl.h:4117
const RecordDecl * getParent() const
Returns the parent of this field declaration, which is the struct in which this field is defined...
Definition: Decl.h:2832
bool isCXXForRangeDecl() const
Determine whether this variable is the for-range-declaration in a C++0x for-range statement...
Definition: Decl.h:1370
The base class of the type hierarchy.
Definition: Type.h:1436
Represents an empty-declaration.
Definition: Decl.h:4357
void setCopyExpr(Expr *e)
Definition: Decl.h:3998
friend TrailingObjects
Definition: Decl.h:4172
NestedNameSpecifier * getQualifier() const
Retrieve the nested-name-specifier that qualifies the name of this declaration, if it was present in ...
Definition: Decl.h:3352
bool usesSEHTry() const
Indicates the function uses __try.
Definition: Decl.h:2177
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:522
A container of type source information.
Definition: Decl.h:86
QualType getCallResultType() const
Determine the type of an expression that calls this function.
Definition: Decl.h:2395
StorageDuration
The storage duration for an object (per C++ [basic.stc]).
Definition: Specifiers.h:306
StringLiteral * getAsmString()
Definition: Decl.h:3941
ArrayRef< Capture >::const_iterator capture_const_iterator
Definition: Decl.h:4076
bool CheckingICE
Whether we are checking whether this statement is an integral constant expression.
Definition: Decl.h:804
const Expr * getAnyInitializer() const
Get the initializer for this variable, no matter which declaration it is attached to...
Definition: Decl.h:1224
void setInitStyle(InitializationStyle Style)
Definition: Decl.h:1300
bool isStatic() const
Definition: Decl.h:2435
ArrayRef< ParmVarDecl * >::const_iterator param_const_iterator
Definition: Decl.h:2334
MutableArrayRef< ParmVarDecl * >::iterator param_iterator
Definition: Decl.h:4045
bool isVirtualAsWritten() const
Whether this function is marked as virtual explicitly.
Definition: Decl.h:2050
bool hasInClassInitializer() const
Determine whether this member has a C++11 default member initializer.
Definition: Decl.h:2783
size_t param_size() const
Definition: Decl.h:2341
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3238
capture_const_iterator capture_end() const
Definition: Decl.h:4081
Represents a #pragma comment line.
Definition: Decl.h:139
void setBeingDefined(bool V=true)
True if this decl is currently being defined.
Definition: Decl.h:3190
static CapturedDecl * castFromDeclContext(const DeclContext *DC)
Definition: Decl.h:4230
VarDecl * getMostRecentDeclImpl() override
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: Decl.h:1008
enumerator_range enumerators() const
Definition: Decl.h:3522
bool isInterface() const
Definition: Decl.h:3319
ExplicitVisibilityKind
Kinds of explicit visibility.
Definition: Decl.h:406
Represents a variable declaration or definition.
Definition: Decl.h:827
bool WasEvaluated
Whether this statement was already evaluated.
Definition: Decl.h:793
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Decl.h:4334
QualType getReturnType() const
Definition: Decl.h:2365
RecordDecl * getPreviousDecl()
Definition: Decl.h:3701
bool isFixed() const
Returns true if this is an Objective-C, C++11, or Microsoft-style enumeration with a fixed underlying...
Definition: Decl.h:3598
static bool classofKind(Kind K)
Definition: Decl.h:3102
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6858
redeclarable_base::redecl_range redecl_range
Definition: Decl.h:559
The "union" keyword.
Definition: Type.h:5115
bool hasInheritedDefaultArg() const
Definition: Decl.h:1726
size_t numTrailingObjects(OverloadToken< ImplicitParamDecl >)
Definition: Decl.h:4145
Declaration context for names declared as extern "C" in C++.
Definition: Decl.h:221
The "__interface" keyword.
Definition: Type.h:5112
Parameter for Objective-C &#39;_cmd&#39; argument.
Definition: Decl.h:1548
const FunctionDecl * getCanonicalDecl() const
Definition: Decl.h:2318
NamedDecl * getUnderlyingDecl()
Looks through UsingDecls and ObjCCompatibleAliasDecls for the underlying named decl.
Definition: Decl.h:439
bool field_empty() const
Definition: Decl.h:3885
NamespaceDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this namespace.
Definition: Decl.h:614
Represents an explicit template argument list in C++, e.g., the "<int>" in "sort<int>".
Definition: TemplateBase.h:603
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:67
unsigned getContextParamPosition() const
Definition: Decl.h:4214
static StringRef getTagTypeKindName(TagTypeKind Kind)
Definition: Type.h:5189
static bool classof(const Decl *D)
Definition: Decl.h:2938
Not a TLS variable.
Definition: Decl.h:844
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:37
CharSourceRange getSourceRange(const SourceRange &Range)
Returns the token CharSourceRange corresponding to Range.
Definition: FixIt.h:32
static DeclContext * castToDeclContext(const ExportDecl *D)
Definition: Decl.h:4348
static const NamedDecl * getDefinition(const Decl *D)
Definition: SemaDecl.cpp:2598
Represents a parameter to a function.
Definition: Decl.h:1600
ArrayRef< ParmVarDecl * >::const_iterator param_const_iterator
Definition: Decl.h:4046
MutableArrayRef< ParmVarDecl * >::iterator param_iterator
Definition: Decl.h:2333
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
Provides information about a dependent function-template specialization declaration.
Definition: DeclTemplate.h:671
MutableArrayRef< ParmVarDecl * > parameters()
Definition: Decl.h:4040
bool isARCPseudoStrong() const
Determine whether this variable is an ARC pseudo-__strong variable.
Definition: Decl.h:1395
bool isClass() const
Definition: Decl.h:3320
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:132
Base wrapper for a particular "section" of type source info.
Definition: TypeLoc.h:56
LabelStmt - Represents a label, which has a substatement.
Definition: Stmt.h:1720
Represents a struct/union/class.
Definition: Decl.h:3662
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
Definition: Diagnostic.h:1151
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:84
TypeSourceInfo * getIntegerTypeSourceInfo() const
Return the type source info for the underlying integer type, if no type source info exists...
Definition: Decl.h:3565
FunctionDecl * getPreviousDeclImpl() override
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: Decl.h:1908
static bool classofKind(Kind K)
Definition: Decl.h:1533
Linkage getFormalLinkage() const
Get the linkage from a semantic point of view.
Definition: Decl.h:378
bool isComplete() const
Returns true if this can be considered a complete type.
Definition: Decl.h:3603
One of these records is kept for each identifier that is lexed.
void setIntegerType(QualType T)
Set the underlying integer type.
Definition: Decl.h:3558
bool hasBody() const override
Returns true if this Decl represents a declaration for a body of code, such as a function or method d...
Definition: Decl.h:1983
static bool classofKind(Kind K)
Definition: Decl.h:3893
bool doesNotEscape() const
Definition: Decl.h:4102
FieldDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this field.
Definition: Decl.h:2843
static bool classof(const Decl *D)
Definition: Decl.h:2980
Copy initialization.
Definition: Specifiers.h:260
RecordDecl * getParent()
Definition: Decl.h:2836
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:160
A C++ nested-name-specifier augmented with source location information.
bool isInline() const
Returns true if this is an inline namespace declaration.
Definition: Decl.h:583
bool CheckedICE
Whether we already checked whether this statement was an integral constant expression.
Definition: Decl.h:800
ConstexprSpecKind getConstexprKind() const
Definition: Decl.h:2150
static bool classof(const Decl *D)
Definition: Decl.h:517
RecordDecl * getDefinition() const
Returns the RecordDecl that actually defines this struct/union/class.
Definition: Decl.h:3867
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Decl.h:625
void setObjCForDecl(bool FRD)
Definition: Decl.h:1384
field_range fields() const
Definition: Decl.h:3877
bool hasSkippedBody() const
True if the function was a definition but its body was skipped.
Definition: Decl.h:2278
Represents a member of a struct/union/class.
Definition: Decl.h:2643
ImplicitParamDecl * getContextParam() const
Retrieve the parameter containing captured variables.
Definition: Decl.h:4205
void setEscapingByref()
Definition: Decl.h:1459
Parameter for C++ virtual table pointers.
Definition: Decl.h:1554
const llvm::APSInt & getInitVal() const
Definition: Decl.h:2876
void setLocStart(SourceLocation L)
Definition: Decl.h:504
const FunctionDecl * getDefinition() const
Definition: Decl.h:2011
unsigned getFunctionScopeIndex() const
Returns the index of this parameter in its prototype or method scope.
Definition: Decl.h:1653
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3671
static DeclContext * castToDeclContext(const FunctionDecl *D)
Definition: Decl.h:2634
StringRef getValue() const
Definition: Decl.h:197
ImplicitParamDecl(ASTContext &C, QualType Type, ImplicitParamKind ParamKind)
Definition: Decl.h:1581
FieldDecl * getAnonField() const
Definition: Decl.h:2924
void overrideType(QualType T)
Override the type stored in this TypeSourceInfo. Use with caution!
Definition: Decl.h:103
Linkage getFormalLinkage(Linkage L)
Definition: Linkage.h:95
static bool classofKind(Kind K)
Definition: Decl.h:3655
bool isExternallyDeclarable() const
Determine whether this declaration can be redeclared in a different translation unit.
Definition: Decl.h:393
Stmt * getBody() const override
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: Decl.h:4030
void setParams(ArrayRef< ParmVarDecl *> NewParamInfo)
Definition: Decl.h:2356
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Decl.h:746
bool hasLoadedFieldsFromExternalStorage() const
Definition: Decl.h:3752
bool isGnuLocal() const
Definition: Decl.h:503
bool isPreviousDeclInSameBlockScope() const
Whether this local extern variable declaration&#39;s previous declaration was declared in the same block ...
Definition: Decl.h:1440
TypedefNameDecl * getNextRedeclarationImpl() override
Returns the next redeclaration or itself if this is the only decl.
Definition: Decl.h:3008
TypeSourceInfo * getSignatureAsWritten() const
Definition: Decl.h:4034
Describes a module or submodule.
Definition: Module.h:64
void setARCPseudoStrong(bool PS)
Definition: Decl.h:1396
static bool classofKind(Kind K)
Definition: Decl.h:783
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2325
virtual bool isDefined() const
Definition: Decl.h:1999
SourceLocation getAsmLoc() const
Definition: Decl.h:3933
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:455
TypedefNameDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this typedef-name.
Definition: Decl.h:3057
unsigned getNumParams() const
Definition: Decl.h:4055
bool hasNonTrivialToPrimitiveCopyCUnion() const
Definition: Decl.h:3801
The argument of this type can be passed directly in registers.
Definition: Decl.h:3673
static NamespaceDecl * castFromDeclContext(const DeclContext *DC)
Definition: Decl.h:636
InitializationStyle
Initialization styles.
Definition: Decl.h:830
static bool classof(const Decl *D)
Definition: Decl.h:2888
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2721
TypeDecl(Kind DK, DeclContext *DC, SourceLocation L, IdentifierInfo *Id, SourceLocation StartL=SourceLocation())
Definition: Decl.h:2958
TagKind getTagKind() const
Definition: Decl.h:3312
redeclarable_base::redecl_iterator redecl_iterator
Definition: Decl.h:1014
A convenient class for passing around template argument information.
Definition: TemplateBase.h:554
bool isKNRPromoted() const
True if the value passed to this parameter must undergo K&R-style default argument promotion: ...
Definition: Decl.h:1674
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3828
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
const FieldDecl * getCanonicalDecl() const
Definition: Decl.h:2844
Parameter for captured context.
Definition: Decl.h:1557
bool hasPrototype() const
Whether this function has a prototype, either because one was explicitly written or because it was "i...
Definition: Decl.h:2117
ArrayRef< NamedDecl * > chain() const
Definition: Decl.h:2916
ASTContext & getASTContext() const
Definition: Decl.h:119
Visibility
Describes the different kinds of visibility that a declaration may have.
Definition: Visibility.h:33
param_iterator param_end() const
Retrieve an iterator one past the last parameter decl.
Definition: Decl.h:4222
static bool classof(const Decl *D)
Definition: Decl.h:4129
DefinitionKind hasDefinition() const
Definition: Decl.h:1180
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Decl.h:2970
bool isByRef() const
Whether this is a "by ref" capture, i.e.
Definition: Decl.h:3982
Represents a declaration of a type.
Definition: Decl.h:2943
void setHasObjectMember(bool val)
Definition: Decl.h:3744
NestedNameSpecifierLoc getQualifierLoc() const
Retrieve the nested-name-specifier (with source-location information) that qualifies the name of this...
Definition: Decl.h:760
unsigned getNumPositiveBits() const
Returns the width in bits required to store all the non-negative enumerators of this enum...
Definition: Decl.h:3575
A set of unresolved declarations.
Definition: UnresolvedSet.h:60
void setHasImplicitReturnZero(bool IRZ)
State that falling off this function implicitly returns null/zero.
Definition: Decl.h:2109
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3643
void setExceptionVariable(bool EV)
Definition: Decl.h:1345
Defines the Diagnostic-related interfaces.
bool isConstexpr() const
Whether this variable is (C++11) constexpr.
Definition: Decl.h:1417
static bool classof(const Decl *D)
Definition: Decl.h:127
FunctionDecl * getMostRecentDeclImpl() override
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: Decl.h:1912
bool hasUnparsedDefaultArg() const
Determines whether this parameter has a default argument that has not yet been parsed.
Definition: Decl.h:1710
void setTrivial(bool IT)
Definition: Decl.h:2077
static BlockDecl * castFromDeclContext(const DeclContext *DC)
Definition: Decl.h:4134
TagDecl * getPreviousDeclImpl() override
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: Decl.h:3176
static bool classof(const Decl *D)
Definition: Decl.h:4225
Defines the Linkage enumeration and various utility functions.
const Expr * getInitExpr() const
Definition: Decl.h:2874
bool hasNameForLinkage() const
Is this tag type named, either directly or via being defined in a typedef of this type...
Definition: Decl.h:3339
TypedefNameDecl * getPreviousDeclImpl() override
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: Decl.h:3012
bool isCompleteDefinitionRequired() const
Return true if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3247
static bool classofKind(Kind K)
Definition: Decl.h:1596
redeclarable_base::redecl_range redecl_range
Definition: Decl.h:1013
static bool classofKind(Kind K)
Definition: Decl.h:168
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4140
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2879
Ordinary names.
Definition: DeclBase.h:146
void setInitExpr(Expr *E)
Definition: Decl.h:2878
void setStmt(LabelStmt *T)
Definition: Decl.h:501
void setLocStart(SourceLocation L)
Definition: Decl.h:2971
ArgPassingKind getArgPassingRestrictions() const
Definition: Decl.h:3816
VarDecl * getPreviousDeclImpl() override
Implementation of getPreviousDecl(), to be overridden by any subclass that has a redeclaration chain...
Definition: Decl.h:1004
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3735
param_iterator param_begin()
Definition: Decl.h:2337
bool isConstexprSpecified() const
Definition: Decl.h:2153
void setHasInheritedPrototype(bool P=true)
State that this function inherited its prototype from a previous declaration.
Definition: Decl.h:2139
Defines the clang::Visibility enumeration and various utility functions.
Module * getImportedModule() const
Retrieve the module that was imported by the import declaration.
Definition: Decl.h:4289
bool isEscapingByref() const
Definition: Decl.h:3984
param_const_iterator param_end() const
Definition: Decl.h:2340
static bool classof(const Decl *D)
Definition: Decl.h:3654
StorageDuration getStorageDuration() const
Get the storage duration of this variable, per C++ [basic.stc].
Definition: Decl.h:1095
static bool classof(const Decl *D)
Definition: Decl.h:3101
StringRef getArg() const
Definition: Decl.h:164
void removeInClassInitializer()
Remove the C++11 in-class initializer from this member.
Definition: Decl.h:2809
void setInline(bool Inline)
Set whether this is an inline namespace declaration.
Definition: Decl.h:588
Provides definitions for the various language-specific address spaces.
QualType getDeclaredReturnType() const
Get the declared return type, which may differ from the actual return type if the return type is dedu...
Definition: Decl.h:2376
void setLazyBody(uint64_t Offset)
Definition: Decl.h:2044
bool isExternalFormalLinkage(Linkage L)
Definition: Linkage.h:108
RecordDecl * getMostRecentDecl()
Definition: Decl.h:3709
A placeholder type used to construct an empty shell of a decl-derived type that will be filled in lat...
Definition: DeclBase.h:104
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3107
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1043
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1320
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3725
static bool classof(const Decl *D)
Definition: Decl.h:1532
bool isFileVarDecl() const
Returns true for file scoped variable declaration.
Definition: Decl.h:1208
static bool classofKind(Kind K)
Definition: Decl.h:632
void setImplicitlyInline(bool I=true)
Flag that this function is implicitly inline.
Definition: Decl.h:2422
static bool classof(const Decl *D)
Definition: Decl.h:4300
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:696
QualType getPromotionType() const
Return the integer type that enumerators should promote to.
Definition: Decl.h:3541
void setStorageClass(StorageClass SClass)
Sets the storage class as written in the source.
Definition: Decl.h:2407
bool canAvoidCopyToHeap() const
Definition: Decl.h:4105
bool isInlineSpecified() const
Definition: Decl.h:1402
TypeSourceInfo * getTypeSourceInfo() const
Definition: Decl.h:3035
static bool classof(const Decl *D)
Definition: Decl.h:3944
void setInClassInitializer(Expr *Init)
Set the C++11 in-class initializer for this member.
Definition: Decl.h:2800
FieldDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, Expr *BW, bool Mutable, InClassInitStyle InitStyle)
Definition: Decl.h:2690
bool isTransparentTag() const
Determines if this typedef shares a name and spelling location with its underlying tag type...
Definition: Decl.h:3069
static bool classof(const Decl *D)
Definition: Decl.h:2847
unsigned Offset
Definition: Format.cpp:1809
bool isConsteval() const
Definition: Decl.h:2156
void setTrivialForCall(bool IT)
Definition: Decl.h:2080
TypedefNameDecl * getMostRecentDeclImpl() override
Implementation of getMostRecentDecl(), to be overridden by any subclass that has a redeclaration chai...
Definition: Decl.h:3016
bool isInlineSpecified() const
Determine whether the "inline" keyword was specified for this function.
Definition: Decl.h:2413
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3951
unsigned getFunctionScopeDepth() const
Definition: Decl.h:1647
bool isMultiVersion() const
True if this function is considered a multiversioned function.
Definition: