libstdc++
entry_pred.hpp
Go to the documentation of this file.
1// -*- C++ -*-
2
3// Copyright (C) 2005-2021 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
44namespace __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:
65
66 public:
67 typedef typename __rebind_v::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
GNU extensions for policy-based data structures for public use.
Consistent API for accessing allocator-related types.
Entry predicate primary class template.
Definition: entry_pred.hpp:50