59 lines
1.9 KiB
C++
59 lines
1.9 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_TRANSFORM_INCLUSIVE_SCAN_H
|
|
#define _LIBCPP___NUMERIC_TRANSFORM_INCLUSIVE_SCAN_H
|
|
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
|
|
template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp, class _UnaryOp>
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
transform_inclusive_scan(_InputIterator __first, _InputIterator __last,
|
|
_OutputIterator __result, _BinaryOp __b, _UnaryOp __u, _Tp __init)
|
|
{
|
|
for (; __first != __last; ++__first, (void) ++__result) {
|
|
__init = __b(__init, __u(*__first));
|
|
*__result = __init;
|
|
}
|
|
|
|
return __result;
|
|
}
|
|
|
|
template <class _InputIterator, class _OutputIterator, class _BinaryOp, class _UnaryOp>
|
|
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
transform_inclusive_scan(_InputIterator __first, _InputIterator __last,
|
|
_OutputIterator __result, _BinaryOp __b, _UnaryOp __u)
|
|
{
|
|
if (__first != __last) {
|
|
typename iterator_traits<_InputIterator>::value_type __init = __u(*__first);
|
|
*__result++ = __init;
|
|
if (++__first != __last)
|
|
return _VSTD::transform_inclusive_scan(__first, __last, __result, __b, __u, __init);
|
|
}
|
|
|
|
return __result;
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___NUMERIC_TRANSFORM_INCLUSIVE_SCAN_H
|