1*4824e7fdSDimitry Andric // -*- C++ -*- 2*4824e7fdSDimitry Andric //===----------------------------------------------------------------------===// 3*4824e7fdSDimitry Andric // 4*4824e7fdSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*4824e7fdSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6*4824e7fdSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*4824e7fdSDimitry Andric // 8*4824e7fdSDimitry Andric //===----------------------------------------------------------------------===// 9*4824e7fdSDimitry Andric 10*4824e7fdSDimitry Andric #ifndef _LIBCPP___NUMERIC_PARTIAL_SUM_H 11*4824e7fdSDimitry Andric #define _LIBCPP___NUMERIC_PARTIAL_SUM_H 12*4824e7fdSDimitry Andric 13*4824e7fdSDimitry Andric #include <__config> 14*4824e7fdSDimitry Andric #include <__iterator/iterator_traits.h> 15*4824e7fdSDimitry Andric #include <__utility/move.h> 16*4824e7fdSDimitry Andric 17*4824e7fdSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18*4824e7fdSDimitry Andric # pragma GCC system_header 19*4824e7fdSDimitry Andric #endif 20*4824e7fdSDimitry Andric 21*4824e7fdSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 22*4824e7fdSDimitry Andric 23*4824e7fdSDimitry Andric template <class _InputIterator, class _OutputIterator> 24*4824e7fdSDimitry Andric _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 25*4824e7fdSDimitry Andric _OutputIterator 26*4824e7fdSDimitry Andric partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 27*4824e7fdSDimitry Andric { 28*4824e7fdSDimitry Andric if (__first != __last) 29*4824e7fdSDimitry Andric { 30*4824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __t(*__first); 31*4824e7fdSDimitry Andric *__result = __t; 32*4824e7fdSDimitry Andric for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) 33*4824e7fdSDimitry Andric { 34*4824e7fdSDimitry Andric #if _LIBCPP_STD_VER > 17 35*4824e7fdSDimitry Andric __t = _VSTD::move(__t) + *__first; 36*4824e7fdSDimitry Andric #else 37*4824e7fdSDimitry Andric __t = __t + *__first; 38*4824e7fdSDimitry Andric #endif 39*4824e7fdSDimitry Andric *__result = __t; 40*4824e7fdSDimitry Andric } 41*4824e7fdSDimitry Andric } 42*4824e7fdSDimitry Andric return __result; 43*4824e7fdSDimitry Andric } 44*4824e7fdSDimitry Andric 45*4824e7fdSDimitry Andric template <class _InputIterator, class _OutputIterator, class _BinaryOperation> 46*4824e7fdSDimitry Andric _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 47*4824e7fdSDimitry Andric _OutputIterator 48*4824e7fdSDimitry Andric partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 49*4824e7fdSDimitry Andric _BinaryOperation __binary_op) 50*4824e7fdSDimitry Andric { 51*4824e7fdSDimitry Andric if (__first != __last) 52*4824e7fdSDimitry Andric { 53*4824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __t(*__first); 54*4824e7fdSDimitry Andric *__result = __t; 55*4824e7fdSDimitry Andric for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) 56*4824e7fdSDimitry Andric { 57*4824e7fdSDimitry Andric #if _LIBCPP_STD_VER > 17 58*4824e7fdSDimitry Andric __t = __binary_op(_VSTD::move(__t), *__first); 59*4824e7fdSDimitry Andric #else 60*4824e7fdSDimitry Andric __t = __binary_op(__t, *__first); 61*4824e7fdSDimitry Andric #endif 62*4824e7fdSDimitry Andric *__result = __t; 63*4824e7fdSDimitry Andric } 64*4824e7fdSDimitry Andric } 65*4824e7fdSDimitry Andric return __result; 66*4824e7fdSDimitry Andric } 67*4824e7fdSDimitry Andric 68*4824e7fdSDimitry Andric _LIBCPP_END_NAMESPACE_STD 69*4824e7fdSDimitry Andric 70*4824e7fdSDimitry Andric #endif // _LIBCPP___NUMERIC_PARTIAL_SUM_H 71