v1/__algorithm/partition_copy.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_PARTITION_COPY_H
0010 #define _LIBCPP___ALGORITHM_PARTITION_COPY_H
0011
0012 #include <__config>
0013 #include <__iterator/iterator_traits.h>
0014 #include <__utility/pair.h>
0015
0016 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0017 #  pragma GCC system_header
0018 #endif
0019
0020 _LIBCPP_BEGIN_NAMESPACE_STD
0021
0022 template <class _InputIterator, class _OutputIterator1, class _OutputIterator2, class _Predicate>
0023 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_OutputIterator1, _OutputIterator2> partition_copy(
0024     _InputIterator __first,
0025     _InputIterator __last,
0026     _OutputIterator1 __out_true,
0027     _OutputIterator2 __out_false,
0028     _Predicate __pred) {
0029   for (; __first != __last; ++__first) {
0030     if (__pred(*__first)) {
0031       *__out_true = *__first;
0032       ++__out_true;
0033     } else {
0034       *__out_false = *__first;
0035       ++__out_false;
0036     }
0037   }
0038   return pair<_OutputIterator1, _OutputIterator2>(__out_true, __out_false);
0039 }
0040
0041 _LIBCPP_END_NAMESPACE_STD
0042
0043 #endif // _LIBCPP___ALGORITHM_PARTITION_COPY_H