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 > 14 25 26 template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp> 27 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator 28 inclusive_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 36 template <class _InputIterator, class _OutputIterator, class _BinaryOp> 37 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator 38 inclusive_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 _VSTD::inclusive_scan(__first, __last, __result, __b, __init); 44 } 45 46 return __result; 47 } 48 49 template <class _InputIterator, class _OutputIterator> 50 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator inclusive_scan(_InputIterator __first, 51 _InputIterator __last, 52 _OutputIterator __result) { 53 return _VSTD::inclusive_scan(__first, __last, __result, _VSTD::plus<>()); 54 } 55 56 #endif // _LIBCPP_STD_VER > 14 57 58 _LIBCPP_END_NAMESPACE_STD 59 60 #endif // _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H 61