libcxx/include/__algorithm/replace_copy.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_REPLACE_COPY_H
  10 #define _LIBCPP___ALGORITHM_REPLACE_COPY_H
  11
  12 #include <__config>
  13
  14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  15 #  pragma GCC system_header
  16 #endif
  17
  18 _LIBCPP_BEGIN_NAMESPACE_STD
  19
  20 template <class _InputIterator, class _OutputIterator, class _Tp>
  21 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
  22 _OutputIterator
  23 replace_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result,
  24              const _Tp& __old_value, const _Tp& __new_value)
  25 {
  26     for (; __first != __last; ++__first, (void) ++__result)
  27         if (*__first == __old_value)
  28             *__result = __new_value;
  29         else
  30             *__result = *__first;
  31     return __result;
  32 }
  33
  34 _LIBCPP_END_NAMESPACE_STD
  35
  36 #endif // _LIBCPP___ALGORITHM_REPLACE_COPY_H