ASTUnresolvedSet.h revision 109f5fc8dff6f3bd707e0e4140dc99ef7d4f3e88
1//===-- ASTUnresolvedSet.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 provides an UnresolvedSet-like class, whose contents are
11//  allocated using the allocator associated with an ASTContext.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
16#define LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
17
18#include "clang/AST/ASTVector.h"
19#include "clang/AST/UnresolvedSet.h"
20
21namespace clang {
22
23/// \brief An UnresolvedSet-like class which uses the ASTContext's allocator.
24class ASTUnresolvedSet {
25  typedef ASTVector<DeclAccessPair> DeclsTy;
26  DeclsTy Decls;
27
28  ASTUnresolvedSet(const ASTUnresolvedSet &) LLVM_DELETED_FUNCTION;
29  void operator=(const ASTUnresolvedSet &) LLVM_DELETED_FUNCTION;
30
31public:
32  ASTUnresolvedSet() {}
33  ASTUnresolvedSet(ASTContext &C, unsigned N) : Decls(C, N) {}
34
35  typedef UnresolvedSetIterator iterator;
36  typedef UnresolvedSetIterator const_iterator;
37
38  iterator begin() { return iterator(Decls.begin()); }
39  iterator end() { return iterator(Decls.end()); }
40
41  const_iterator begin() const { return const_iterator(Decls.begin()); }
42  const_iterator end() const { return const_iterator(Decls.end()); }
43
44  void addDecl(ASTContext &C, NamedDecl *D, AccessSpecifier AS) {
45    Decls.push_back(DeclAccessPair::make(D, AS), C);
46  }
47
48  /// Replaces the given declaration with the new one, once.
49  ///
50  /// \return true if the set changed
51  bool replace(const NamedDecl* Old, NamedDecl *New, AccessSpecifier AS) {
52    for (DeclsTy::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
53      if (I->getDecl() == Old) {
54        I->set(New, AS);
55        return true;
56      }
57    }
58    return false;
59  }
60
61  void erase(unsigned I) {
62    Decls[I] = Decls.back();
63    Decls.pop_back();
64  }
65
66  void clear() { Decls.clear(); }
67
68  bool empty() const { return Decls.empty(); }
69  unsigned size() const { return Decls.size(); }
70
71  void reserve(ASTContext &C, unsigned N) {
72    Decls.reserve(C, N);
73  }
74
75  void append(ASTContext &C, iterator I, iterator E) {
76    Decls.append(C, I.ir, E.ir);
77  }
78
79  DeclAccessPair &operator[](unsigned I) { return Decls[I]; }
80  const DeclAccessPair &operator[](unsigned I) const { return Decls[I]; }
81};
82
83} // namespace clang
84
85#endif
86