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1 | // -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2005-2019 Free Software Foundation, Inc. |
4569a895 AT |
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 | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
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 | ||
748086b7 JJ |
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. | |
4569a895 | 19 | |
748086b7 JJ |
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/>. | |
4569a895 AT |
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 | /** | |
a345e45d | 37 | * @file binary_heap_/entry_cmp.hpp |
4569a895 AT |
38 | * Contains an implementation class for a binary_heap. |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP | |
42 | #define PB_DS_BINARY_HEAP_ENTRY_CMP_HPP | |
43 | ||
5e11f978 | 44 | namespace __gnu_pbds |
4569a895 AT |
45 | { |
46 | namespace detail | |
47 | { | |
a345e45d BK |
48 | /// Entry compare, primary template. |
49 | template<typename _VTp, typename Cmp_Fn, typename _Alloc, bool No_Throw> | |
50 | struct entry_cmp; | |
4569a895 | 51 | |
a345e45d BK |
52 | /// Specialization, true. |
53 | template<typename _VTp, typename Cmp_Fn, typename _Alloc> | |
54 | struct entry_cmp<_VTp, Cmp_Fn, _Alloc, true> | |
4569a895 | 55 | { |
a345e45d BK |
56 | /// Compare. |
57 | typedef Cmp_Fn type; | |
58 | }; | |
59 | ||
60 | /// Specialization, false. | |
61 | template<typename _VTp, typename Cmp_Fn, typename _Alloc> | |
62 | struct entry_cmp<_VTp, Cmp_Fn, _Alloc, false> | |
63 | { | |
64 | private: | |
65 | typedef typename _Alloc::template rebind<_VTp> __rebind_v; | |
4569a895 | 66 | |
a345e45d BK |
67 | public: |
68 | typedef typename __rebind_v::other::const_pointer entry; | |
4569a895 | 69 | |
a345e45d BK |
70 | /// Compare plus entry. |
71 | struct type : public Cmp_Fn | |
4569a895 | 72 | { |
a345e45d | 73 | type() { } |
4569a895 | 74 | |
a345e45d BK |
75 | type(const Cmp_Fn& other) : Cmp_Fn(other) { } |
76 | ||
77 | bool | |
78 | operator()(entry lhs, entry rhs) const | |
79 | { return Cmp_Fn::operator()(*lhs, *rhs); } | |
80 | }; | |
81 | }; | |
4569a895 | 82 | } // namespace detail |
5e11f978 | 83 | } // namespace __gnu_pbds |
4569a895 AT |
84 | |
85 | #endif // #ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP |