libcxx/include/__cxx03/__algorithm/copy_if.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_COPY_IF_H
  10 #define _LIBCPP___ALGORITHM_COPY_IF_H
  11
  12 #include <__cxx03/__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 _Predicate>
  21 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
  22 copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) {
  23   for (; __first != __last; ++__first) {
  24     if (__pred(*__first)) {
  25       *__result = *__first;
  26       ++__result;
  27     }
  28   }
  29   return __result;
  30 }
  31
  32 _LIBCPP_END_NAMESPACE_STD
  33
  34 #endif // _LIBCPP___ALGORITHM_COPY_IF_H