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_IN_RESULT_H
11 #define _LIBCPP___ALGORITHM_IN_IN_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_BEGIN_NAMESPACE_STD
22 
23 #if !defined(_LIBCPP_HAS_NO_CONCEPTS)
24 
25 namespace ranges {
26 
27 template <class _I1, class _I2>
28 struct in_in_result {
29   [[no_unique_address]] _I1 in1;
30   [[no_unique_address]] _I2 in2;
31 
32   template <class _II1, class _II2>
33     requires convertible_to<const _I1&, _II1> && convertible_to<const _I2&, _II2>
34    _LIBCPP_HIDE_FROM_ABI constexpr
35    operator in_in_result<_II1, _II2>() const & {
36     return {in1, in2};
37   }
38 
39   template <class _II1, class _II2>
40     requires convertible_to<_I1, _II1> && convertible_to<_I2, _II2>
41   _LIBCPP_HIDE_FROM_ABI constexpr
42   operator in_in_result<_II1, _II2>() && { return {_VSTD::move(in1), _VSTD::move(in2)}; }
43 };
44 
45 } // namespace ranges
46 
47 #endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
48 
49 _LIBCPP_END_NAMESPACE_STD
50 
51 #endif // _LIBCPP___ALGORITHM_IN_IN_RESULT_H
52