clang  3.7.0
UnresolvedSet.h
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1 //===-- UnresolvedSet.h - Unresolved sets of declarations ------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the UnresolvedSet class, which is used to store
11 // collections of declarations in the AST.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CLANG_AST_UNRESOLVEDSET_H
16 #define LLVM_CLANG_AST_UNRESOLVEDSET_H
17 
19 #include "clang/Basic/LLVM.h"
20 #include "llvm/ADT/ArrayRef.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/iterator.h"
23 
24 namespace clang {
25 
26 /// The iterator over UnresolvedSets. Serves as both the const and
27 /// non-const iterator.
28 class UnresolvedSetIterator : public llvm::iterator_adaptor_base<
29  UnresolvedSetIterator, DeclAccessPair *,
30  std::random_access_iterator_tag, NamedDecl *,
31  std::ptrdiff_t, NamedDecl *, NamedDecl *> {
32  friend class UnresolvedSetImpl;
33  friend class ASTUnresolvedSet;
34  friend class OverloadExpr;
35 
37  : iterator_adaptor_base(Iter) {}
38  explicit UnresolvedSetIterator(const DeclAccessPair *Iter)
39  : iterator_adaptor_base(const_cast<DeclAccessPair *>(Iter)) {}
40 
41 public:
43 
44  NamedDecl *getDecl() const { return I->getDecl(); }
45  void setDecl(NamedDecl *ND) const { return I->setDecl(ND); }
46  AccessSpecifier getAccess() const { return I->getAccess(); }
47  void setAccess(AccessSpecifier AS) { I->setAccess(AS); }
48  const DeclAccessPair &getPair() const { return *I; }
49 
50  NamedDecl *operator*() const { return getDecl(); }
51  NamedDecl *operator->() const { return **this; }
52 };
53 
54 /// \brief A set of unresolved declarations.
57 
58  // Don't allow direct construction, and only permit subclassing by
59  // UnresolvedSet.
60 private:
61  template <unsigned N> friend class UnresolvedSet;
64 
65 public:
66  // We don't currently support assignment through this iterator, so we might
67  // as well use the same implementation twice.
70 
71  iterator begin() { return iterator(decls().begin()); }
72  iterator end() { return iterator(decls().end()); }
73 
74  const_iterator begin() const { return const_iterator(decls().begin()); }
75  const_iterator end() const { return const_iterator(decls().end()); }
76 
77  void addDecl(NamedDecl *D) {
78  addDecl(D, AS_none);
79  }
80 
82  decls().push_back(DeclAccessPair::make(D, AS));
83  }
84 
85  /// Replaces the given declaration with the new one, once.
86  ///
87  /// \return true if the set changed
88  bool replace(const NamedDecl* Old, NamedDecl *New) {
89  for (DeclsTy::iterator I = decls().begin(), E = decls().end(); I != E; ++I)
90  if (I->getDecl() == Old)
91  return (I->setDecl(New), true);
92  return false;
93  }
94 
95  /// Replaces the declaration at the given iterator with the new one,
96  /// preserving the original access bits.
97  void replace(iterator I, NamedDecl *New) { I.I->setDecl(New); }
98 
100  I.I->set(New, AS);
101  }
102 
103  void erase(unsigned I) { decls()[I] = decls().pop_back_val(); }
104 
105  void erase(iterator I) { *I.I = decls().pop_back_val(); }
106 
107  void setAccess(iterator I, AccessSpecifier AS) { I.I->setAccess(AS); }
108 
109  void clear() { decls().clear(); }
110  void set_size(unsigned N) { decls().set_size(N); }
111 
112  bool empty() const { return decls().empty(); }
113  unsigned size() const { return decls().size(); }
114 
115  void append(iterator I, iterator E) { decls().append(I.I, E.I); }
116 
117  DeclAccessPair &operator[](unsigned I) { return decls()[I]; }
118  const DeclAccessPair &operator[](unsigned I) const { return decls()[I]; }
119 
120 private:
121  // These work because the only permitted subclass is UnresolvedSetImpl
122 
123  DeclsTy &decls() {
124  return *reinterpret_cast<DeclsTy*>(this);
125  }
126  const DeclsTy &decls() const {
127  return *reinterpret_cast<const DeclsTy*>(this);
128  }
129 };
130 
131 /// \brief A set of unresolved declarations.
132 template <unsigned InlineCapacity> class UnresolvedSet :
133  public UnresolvedSetImpl {
135 };
136 
137 
138 } // namespace clang
139 
140 #endif
void replace(iterator I, NamedDecl *New)
Definition: UnresolvedSet.h:97
void setDecl(NamedDecl *ND) const
Definition: UnresolvedSet.h:45
void setAccess(iterator I, AccessSpecifier AS)
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:83
void setAccess(AccessSpecifier AS)
Definition: UnresolvedSet.h:47
UnresolvedSetIterator const_iterator
Definition: UnresolvedSet.h:69
unsigned size() const
const_iterator begin() const
Definition: UnresolvedSet.h:74
const DeclAccessPair & operator[](unsigned I) const
void addDecl(NamedDecl *D, AccessSpecifier AS)
Definition: UnresolvedSet.h:81
NamedDecl * operator->() const
Definition: UnresolvedSet.h:51
void replace(iterator I, NamedDecl *New, AccessSpecifier AS)
Definition: UnresolvedSet.h:99
static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS)
void set_size(unsigned N)
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
A set of unresolved declarations.
Definition: UnresolvedSet.h:55
void append(iterator I, iterator E)
NamedDecl * getDecl() const
Definition: UnresolvedSet.h:44
void erase(unsigned I)
bool replace(const NamedDecl *Old, NamedDecl *New)
Definition: UnresolvedSet.h:88
A reference to an overloaded function set, either an UnresolvedLookupExpr or an UnresolvedMemberExpr...
Definition: ExprCXX.h:2305
const_iterator end() const
Definition: UnresolvedSet.h:75
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:77
const DeclAccessPair & getPair() const
Definition: UnresolvedSet.h:48
AccessSpecifier getAccess() const
Definition: UnresolvedSet.h:46
A set of unresolved declarations.
An UnresolvedSet-like class which uses the ASTContext's allocator.
NamedDecl * operator*() const
Definition: UnresolvedSet.h:50
void erase(iterator I)
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:411
DeclAccessPair & operator[](unsigned I)
UnresolvedSetIterator iterator
Definition: UnresolvedSet.h:68