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___CXX03___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H 11 #define _LIBCPP___CXX03___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H 12 13 #include <__cxx03/__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 23 template <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___CXX03___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H 43