1e78f53d1SNikolas Klauser // -*- C++ -*- 2e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 3e78f53d1SNikolas Klauser // 4e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 6e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7e78f53d1SNikolas Klauser // 8e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 9e78f53d1SNikolas Klauser 10*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___NUMERIC_PARTIAL_SUM_H 11*ce777190SNikolas Klauser #define _LIBCPP___CXX03___NUMERIC_PARTIAL_SUM_H 12e78f53d1SNikolas Klauser 1373fbae83SNikolas Klauser #include <__cxx03/__config> 1473fbae83SNikolas Klauser #include <__cxx03/__iterator/iterator_traits.h> 1573fbae83SNikolas Klauser #include <__cxx03/__utility/move.h> 16e78f53d1SNikolas Klauser 17e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18e78f53d1SNikolas Klauser # pragma GCC system_header 19e78f53d1SNikolas Klauser #endif 20e78f53d1SNikolas Klauser 21e78f53d1SNikolas Klauser _LIBCPP_PUSH_MACROS 2273fbae83SNikolas Klauser #include <__cxx03/__undef_macros> 23e78f53d1SNikolas Klauser 24e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 25e78f53d1SNikolas Klauser 26e78f53d1SNikolas Klauser template <class _InputIterator, class _OutputIterator> 27e78f53d1SNikolas Klauser _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator 28e78f53d1SNikolas Klauser partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result) { 29e78f53d1SNikolas Klauser if (__first != __last) { 30e78f53d1SNikolas Klauser typename iterator_traits<_InputIterator>::value_type __t(*__first); 31e78f53d1SNikolas Klauser *__result = __t; 32e78f53d1SNikolas Klauser for (++__first, (void)++__result; __first != __last; ++__first, (void)++__result) { 33e78f53d1SNikolas Klauser #if _LIBCPP_STD_VER >= 20 34e78f53d1SNikolas Klauser __t = std::move(__t) + *__first; 35e78f53d1SNikolas Klauser #else 36e78f53d1SNikolas Klauser __t = __t + *__first; 37e78f53d1SNikolas Klauser #endif 38e78f53d1SNikolas Klauser *__result = __t; 39e78f53d1SNikolas Klauser } 40e78f53d1SNikolas Klauser } 41e78f53d1SNikolas Klauser return __result; 42e78f53d1SNikolas Klauser } 43e78f53d1SNikolas Klauser 44e78f53d1SNikolas Klauser template <class _InputIterator, class _OutputIterator, class _BinaryOperation> 45e78f53d1SNikolas Klauser _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator 46e78f53d1SNikolas Klauser partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op) { 47e78f53d1SNikolas Klauser if (__first != __last) { 48e78f53d1SNikolas Klauser typename iterator_traits<_InputIterator>::value_type __t(*__first); 49e78f53d1SNikolas Klauser *__result = __t; 50e78f53d1SNikolas Klauser for (++__first, (void)++__result; __first != __last; ++__first, (void)++__result) { 51e78f53d1SNikolas Klauser #if _LIBCPP_STD_VER >= 20 52e78f53d1SNikolas Klauser __t = __binary_op(std::move(__t), *__first); 53e78f53d1SNikolas Klauser #else 54e78f53d1SNikolas Klauser __t = __binary_op(__t, *__first); 55e78f53d1SNikolas Klauser #endif 56e78f53d1SNikolas Klauser *__result = __t; 57e78f53d1SNikolas Klauser } 58e78f53d1SNikolas Klauser } 59e78f53d1SNikolas Klauser return __result; 60e78f53d1SNikolas Klauser } 61e78f53d1SNikolas Klauser 62e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 63e78f53d1SNikolas Klauser 64e78f53d1SNikolas Klauser _LIBCPP_POP_MACROS 65e78f53d1SNikolas Klauser 66*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___NUMERIC_PARTIAL_SUM_H 67