contrib/llvm-project/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 <__config>
  13 #include <__algorithm/find.h>
  14 #include <__algorithm/find_if.h>
  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 _LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator
  28 remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_)
  29 {
  30     __first = _VSTD::find(__first, __last, __value_);
  31     if (__first != __last)
  32     {
  33         _ForwardIterator __i = __first;
  34         while (++__i != __last)
  35         {
  36             if (!(*__i == __value_))
  37             {
  38                 *__first = _VSTD::move(*__i);
  39                 ++__first;
  40             }
  41         }
  42     }
  43     return __first;
  44 }
  45
  46 _LIBCPP_END_NAMESPACE_STD
  47
  48 _LIBCPP_POP_MACROS
  49
  50 #endif // _LIBCPP___ALGORITHM_REMOVE_H