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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H11#define _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H12 13#include <__config>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19_LIBCPP_BEGIN_NAMESPACE_STD20 21#if _LIBCPP_STD_VER >= 1722 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 >= 1739 40_LIBCPP_END_NAMESPACE_STD41 42#endif // _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H43