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-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H 11#define _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H 12 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_header 20#endif 21 22_LIBCPP_BEGIN_NAMESPACE_STD 23 24#if _LIBCPP_STD_VER >= 17 25 26template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp> 27_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator 28inclusive_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 _OutputIterator 38inclusive_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 _OutputIterator 51inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result) { 52 return std::inclusive_scan(__first, __last, __result, std::plus<>()); 53} 54 55#endif // _LIBCPP_STD_VER >= 17 56 57_LIBCPP_END_NAMESPACE_STD 58 59#endif // _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H 60