libcxx/include/__cxx03/__algorithm/min_max_result.h

   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___CXX03___ALGORITHM_MIN_MAX_RESULT_H
  11 #define _LIBCPP___CXX03___ALGORITHM_MIN_MAX_RESULT_H
  12
  13 #include <__cxx03/__concepts/convertible_to.h>
  14 #include <__cxx03/__config>
  15 #include <__cxx03/__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 <__cxx03/__undef_macros>
  23
  24 _LIBCPP_BEGIN_NAMESPACE_STD
  25
  26 #if _LIBCPP_STD_VER >= 20
  27
  28 namespace ranges {
  29
  30 template <class _T1>
  31 struct min_max_result {
  32   _LIBCPP_NO_UNIQUE_ADDRESS _T1 min;
  33   _LIBCPP_NO_UNIQUE_ADDRESS _T1 max;
  34
  35   template <class _T2>
  36     requires convertible_to<const _T1&, _T2>
  37   _LIBCPP_HIDE_FROM_ABI constexpr operator min_max_result<_T2>() const& {
  38     return {min, max};
  39   }
  40
  41   template <class _T2>
  42     requires convertible_to<_T1, _T2>
  43   _LIBCPP_HIDE_FROM_ABI constexpr operator min_max_result<_T2>() && {
  44     return {std::move(min), std::move(max)};
  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___CXX03___ALGORITHM_MIN_MAX_RESULT_H