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_FUN_RESULT_H
11 #define _LIBCPP___ALGORITHM_IN_FUN_RESULT_H
13 #include <__cxx03/__concepts/convertible_to.h>
14 #include <__cxx03/__config>
15 #include <__cxx03/__utility/move.h>
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 # pragma GCC system_header
22 #include <__cxx03/__undef_macros>
24 _LIBCPP_BEGIN_NAMESPACE_STD
26 #if _LIBCPP_STD_VER >= 20
29 template <class _InIter1
, class _Func1
>
30 struct in_fun_result
{
31 _LIBCPP_NO_UNIQUE_ADDRESS _InIter1 in
;
32 _LIBCPP_NO_UNIQUE_ADDRESS _Func1 fun
;
34 template <class _InIter2
, class _Func2
>
35 requires convertible_to
<const _InIter1
&, _InIter2
> && convertible_to
<const _Func1
&, _Func2
>
36 _LIBCPP_HIDE_FROM_ABI
constexpr operator in_fun_result
<_InIter2
, _Func2
>() const& {
40 template <class _InIter2
, class _Func2
>
41 requires convertible_to
<_InIter1
, _InIter2
> && convertible_to
<_Func1
, _Func2
>
42 _LIBCPP_HIDE_FROM_ABI
constexpr operator in_fun_result
<_InIter2
, _Func2
>() && {
43 return {std::move(in
), std::move(fun
)};
48 #endif // _LIBCPP_STD_VER >= 20
50 _LIBCPP_END_NAMESPACE_STD
54 #endif // _LIBCPP___ALGORITHM_IN_FUN_RESULT_H