1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___ITERATOR_ERASE_IF_CONTAINER_H
11#define _LIBCPP___ITERATOR_ERASE_IF_CONTAINER_H
12
13#include <__config>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16#  pragma GCC system_header
17#endif
18
19_LIBCPP_PUSH_MACROS
20#include <__undef_macros>
21
22_LIBCPP_BEGIN_NAMESPACE_STD
23
24template <class _Container, class _Predicate>
25_LIBCPP_HIDE_FROM_ABI typename _Container::size_type __libcpp_erase_if_container(_Container& __c, _Predicate& __pred) {
26  typename _Container::size_type __old_size = __c.size();
27
28  const typename _Container::iterator __last = __c.end();
29  for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) {
30    if (__pred(*__iter))
31      __iter = __c.erase(__iter);
32    else
33      ++__iter;
34  }
35
36  return __old_size - __c.size();
37}
38
39_LIBCPP_END_NAMESPACE_STD
40
41_LIBCPP_POP_MACROS
42
43#endif // _LIBCPP___ITERATOR_ERASE_IF_CONTAINER_H
44