libstdc++
entry_pred.hpp
Go to the documentation of this file.
1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009, 2011 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the terms
7 // of the GNU General Public License as published by the Free Software
8 // Foundation; either version 3, or (at your option) any later
9 // version.
10 
11 // This library is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
26 
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
29 // notice appears in all copies, and that both that copyright notice
30 // and this permission notice appear in supporting documentation. None
31 // of the above authors, nor IBM Haifa Research Laboratories, make any
32 // representation about the suitability of this software for any
33 // purpose. It is provided "as is" without express or implied
34 // warranty.
35 
36 /**
37  * @file binary_heap_/entry_pred.hpp
38  * Contains an implementation class for a binary_heap.
39  */
40 
41 #ifndef PB_DS_BINARY_HEAP_ENTRY_PRED_HPP
42 #define PB_DS_BINARY_HEAP_ENTRY_PRED_HPP
43 
44 namespace __gnu_pbds
45 {
46  namespace detail
47  {
48  /// Entry predicate primary class template.
49  template<typename _VTp, typename Pred, typename _Alloc, bool No_Throw>
50  struct entry_pred;
51 
52  /// Specialization, true.
53  template<typename _VTp, typename Pred, typename _Alloc>
54  struct entry_pred<_VTp, Pred, _Alloc, true>
55  {
56  typedef Pred type;
57  };
58 
59  /// Specialization, false.
60  template<typename _VTp, typename Pred, typename _Alloc>
61  struct entry_pred<_VTp, Pred, _Alloc, false>
62  {
63  private:
64  typedef typename _Alloc::template rebind<_VTp> __rebind_v;
65 
66  public:
67  typedef typename __rebind_v::other::const_pointer entry;
68 
69  struct type : public Pred
70  {
71  inline
72  type() { }
73 
74  inline
75  type(const Pred& other) : Pred(other) { }
76 
77  inline bool
78  operator()(entry p_v) const
79  { return Pred::operator()(*p_v); }
80  };
81  };
82  } // namespace detail
83 } // namespace __gnu_pbds
84 
85 #endif // #ifndef PB_DS_BINARY_HEAP_ENTRY_PRED_HPP
Entry predicate primary class template.
Definition: entry_pred.hpp:50