71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___NUMERIC_PARTIAL_SUM_H
|
|
#define _LIBCPP___NUMERIC_PARTIAL_SUM_H
|
|
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__utility/move.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _InputIterator, class _OutputIterator>
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
|
|
{
|
|
if (__first != __last)
|
|
{
|
|
typename iterator_traits<_InputIterator>::value_type __t(*__first);
|
|
*__result = __t;
|
|
for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
|
|
{
|
|
#if _LIBCPP_STD_VER > 17
|
|
__t = _VSTD::move(__t) + *__first;
|
|
#else
|
|
__t = __t + *__first;
|
|
#endif
|
|
*__result = __t;
|
|
}
|
|
}
|
|
return __result;
|
|
}
|
|
|
|
template <class _InputIterator, class _OutputIterator, class _BinaryOperation>
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result,
|
|
_BinaryOperation __binary_op)
|
|
{
|
|
if (__first != __last)
|
|
{
|
|
typename iterator_traits<_InputIterator>::value_type __t(*__first);
|
|
*__result = __t;
|
|
for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
|
|
{
|
|
#if _LIBCPP_STD_VER > 17
|
|
__t = __binary_op(_VSTD::move(__t), *__first);
|
|
#else
|
|
__t = __binary_op(__t, *__first);
|
|
#endif
|
|
*__result = __t;
|
|
}
|
|
}
|
|
return __result;
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___NUMERIC_PARTIAL_SUM_H
|