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_PUSH_MACROS
  22 #include <__undef_macros>
  23
  24 _LIBCPP_BEGIN_NAMESPACE_STD
  25
  26 template <class _ForwardIterator, class _Tp>
  27 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
  28 remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
  29   __first = std::find(__first, __last, __value);
  30   if (__first != __last) {
  31     _ForwardIterator __i = __first;
  32     while (++__i != __last) {
  33       if (!(*__i == __value)) {
  34         *__first = std::move(*__i);
  35         ++__first;
  36       }
  37     }
  38   }
  39   return __first;
  40 }
  41
  42 _LIBCPP_END_NAMESPACE_STD
  43
  44 _LIBCPP_POP_MACROS
  45
  46 #endif // _LIBCPP___ALGORITHM_REMOVE_H