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___ALGORITHM_IN_OUT_RESULT_H 11 #define _LIBCPP___ALGORITHM_IN_OUT_RESULT_H 12 13 #include <__concepts/convertible_to.h> 14 #include <__config> 15 #include <__utility/move.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_PUSH_MACROS 22 #include <__undef_macros> 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 #if _LIBCPP_STD_VER >= 20 27 28 namespace ranges { 29 30 template <class _InIter1, class _OutIter1> 31 struct in_out_result { 32 _LIBCPP_NO_UNIQUE_ADDRESS _InIter1 in; 33 _LIBCPP_NO_UNIQUE_ADDRESS _OutIter1 out; 34 35 template <class _InIter2, class _OutIter2> 36 requires convertible_to<const _InIter1&, _InIter2> && convertible_to<const _OutIter1&, _OutIter2> 37 _LIBCPP_HIDE_FROM_ABI constexpr operator in_out_result<_InIter2, _OutIter2>() const& { 38 return {in, out}; 39 } 40 41 template <class _InIter2, class _OutIter2> 42 requires convertible_to<_InIter1, _InIter2> && convertible_to<_OutIter1, _OutIter2> 43 _LIBCPP_HIDE_FROM_ABI constexpr operator in_out_result<_InIter2, _OutIter2>() && { 44 return {std::move(in), std::move(out)}; 45 } 46 }; 47 48 } // namespace ranges 49 50 #endif // _LIBCPP_STD_VER >= 20 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 _LIBCPP_POP_MACROS 55 56 #endif // _LIBCPP___ALGORITHM_IN_OUT_RESULT_H 57