2 //===----------------------------------------------------------------------===//
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
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP___ALGORITHM_IN_OUT_RESULT_H
11 #define _LIBCPP___ALGORITHM_IN_OUT_RESULT_H
13 #include <__concepts/convertible_to.h>
15 #include <__utility/move.h>
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 # pragma GCC system_header
22 #include <__undef_macros>
24 _LIBCPP_BEGIN_NAMESPACE_STD
26 #if _LIBCPP_STD_VER >= 20
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;
35 template <class _InIter2, class _OutIter2>
36 requires convertible_to<const _InIter1&, _InIter2> && convertible_to<const _OutIter1&, _OutIter2>
38 constexpr operator in_out_result<_InIter2, _OutIter2>() const & {
42 template <class _InIter2, class _OutIter2>
43 requires convertible_to<_InIter1, _InIter2> && convertible_to<_OutIter1, _OutIter2>
45 constexpr operator in_out_result<_InIter2, _OutIter2>() && {
46 return {std::move(in), std::move(out)};
52 #endif // _LIBCPP_STD_VER >= 20
54 _LIBCPP_END_NAMESPACE_STD
58 #endif // _LIBCPP___ALGORITHM_IN_OUT_RESULT_H