libcxx/include/__algorithm/remove.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___ALGORITHM_REMOVE_H
  10 #define _LIBCPP___ALGORITHM_REMOVE_H
  11
  12 #include <__algorithm/find.h>
  13 #include <__algorithm/find_if.h>
  14 #include <__config>
  15 #include <__utility/move.h>
  16
  17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  18 #  pragma GCC system_header
  19 #endif
  20
  21 _LIBCPP_BEGIN_NAMESPACE_STD
  22
  23 template <class _ForwardIterator, class _Tp>
  24 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
  25 remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value)
  26 {
  27     __first = _VSTD::find(__first, __last, __value);
  28     if (__first != __last)
  29     {
  30         _ForwardIterator __i = __first;
  31         while (++__i != __last)
  32         {
  33             if (!(*__i == __value))
  34             {
  35                 *__first = _VSTD::move(*__i);
  36                 ++__first;
  37             }
  38         }
  39     }
  40     return __first;
  41 }
  42
  43 _LIBCPP_END_NAMESPACE_STD
  44
  45 #endif // _LIBCPP___ALGORITHM_REMOVE_H