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_FUN_RESULT_H 11 #define _LIBCPP___ALGORITHM_IN_FUN_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 template <class _InIter1, class _Func1> 30 struct in_fun_result { 31 _LIBCPP_NO_UNIQUE_ADDRESS _InIter1 in; 32 _LIBCPP_NO_UNIQUE_ADDRESS _Func1 fun; 33 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& { 37 return {in, fun}; 38 } 39 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)}; 44 } 45 }; 46 } // namespace ranges 47 48 #endif // _LIBCPP_STD_VER >= 20 49 50 _LIBCPP_END_NAMESPACE_STD 51 52 _LIBCPP_POP_MACROS 53 54 #endif // _LIBCPP___ALGORITHM_IN_FUN_RESULT_H 55