libstdc++
erase_if.h
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1// <bits/erase_if.h> -*- C++ -*-
2
3// Copyright (C) 2015-2024 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#include <bits/c++config.h>
36
37// Used by C++17 containers and Library Fundamentals v2 headers.
38#if __cplusplus >= 201402L
39namespace std
40{
41_GLIBCXX_BEGIN_NAMESPACE_VERSION
42
43 namespace __detail
44 {
45 template<typename _Container, typename _UnsafeContainer,
46 typename _Predicate>
47 typename _Container::size_type
48 __erase_nodes_if(_Container& __cont, _UnsafeContainer& __ucont,
49 _Predicate __pred)
50 {
51 typename _Container::size_type __num = 0;
52 for (auto __iter = __ucont.begin(), __last = __ucont.end();
53 __iter != __last;)
54 {
55 if (__pred(*__iter))
56 {
57 __iter = __cont.erase(__iter);
58 ++__num;
59 }
60 else
61 ++__iter;
62 }
63 return __num;
64 }
65 } // namespace __detail
66
67_GLIBCXX_END_NAMESPACE_VERSION
68} // namespace std
69#endif // C++14
70
71#endif // _GLIBCXX_ERASE_IF_H
ISO C++ entities toplevel namespace is std.