1// <bits/erase_if.h> -*- C++ -*-
2
3// Copyright (C) 2015-2021 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
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU 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/** @file bits/erase_if.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly.
28 */
29
30#ifndef _GLIBCXX_ERASE_IF_H
31#define _GLIBCXX_ERASE_IF_H 1
32
33#pragma GCC system_header
34
35#if __cplusplus >= 201402L
36
37#include <bits/c++config.h>
38
39namespace std
40{
41_GLIBCXX_BEGIN_NAMESPACE_VERSION
42
43#if __cplusplus > 201703L
44# define __cpp_lib_erase_if 202002L
45#endif
46
47 namespace __detail
48 {
49 template<typename _Container, typename _Predicate>
50 typename _Container::size_type
51 __erase_nodes_if(_Container& __cont, _Predicate __pred)
52 {
53 typename _Container::size_type __num = 0;
54 for (auto __iter = __cont.begin(), __last = __cont.end();
55 __iter != __last;)
56 {
57 if (__pred(*__iter))
58 {
59 __iter = __cont.erase(__iter);
60 ++__num;
61 }
62 else
63 ++__iter;
64 }
65 return __num;
66 }
67 } // namespace __detail
68
69_GLIBCXX_END_NAMESPACE_VERSION
70} // namespace std
71
72#endif // C++14
73
74#endif // _GLIBCXX_ERASE_IF_H
75