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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H11#define _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H12 13#include <__config>14#include <__functional/operations.h>15#include <__iterator/iterator_traits.h>16#include <__utility/move.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 24#if _LIBCPP_STD_VER >= 1725 26template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>27_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator28inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOp __b, _Tp __init) {29 for (; __first != __last; ++__first, (void)++__result) {30 __init = __b(__init, *__first);31 *__result = __init;32 }33 return __result;34}35 36template <class _InputIterator, class _OutputIterator, class _BinaryOp>37_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator38inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOp __b) {39 if (__first != __last) {40 typename iterator_traits<_InputIterator>::value_type __init = *__first;41 *__result++ = __init;42 if (++__first != __last)43 return std::inclusive_scan(__first, __last, __result, __b, __init);44 }45 46 return __result;47}48 49template <class _InputIterator, class _OutputIterator>50_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator51inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result) {52 return std::inclusive_scan(__first, __last, __result, std::plus<>());53}54 55#endif // _LIBCPP_STD_VER >= 1756 57_LIBCPP_END_NAMESPACE_STD58 59#endif // _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H60