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_TRANSFORM_EXCLUSIVE_SCAN_H 11#define _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H 12 13#include <__config> 14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16# pragma GCC system_header 17#endif 18 19_LIBCPP_BEGIN_NAMESPACE_STD 20 21#if _LIBCPP_STD_VER >= 17 22 23template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp, class _UnaryOp> 24_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator transform_exclusive_scan( 25 _InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init, _BinaryOp __b, _UnaryOp __u) { 26 if (__first != __last) { 27 _Tp __saved = __init; 28 do { 29 __init = __b(__init, __u(*__first)); 30 *__result = __saved; 31 __saved = __init; 32 ++__result; 33 } while (++__first != __last); 34 } 35 return __result; 36} 37 38#endif // _LIBCPP_STD_VER >= 17 39 40_LIBCPP_END_NAMESPACE_STD 41 42#endif // _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H 43