libcxx/include/__algorithm/in_out_out_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___ALGORITHM_IN_OUT_OUT_RESULT_H
  11 #define _LIBCPP___ALGORITHM_IN_OUT_OUT_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 _LIBCPP_STD_VER >= 20
  24
  25 namespace ranges {
  26 template <class _InIter1, class _OutIter1, class _OutIter2>
  27 struct in_out_out_result {
  28   _LIBCPP_NO_UNIQUE_ADDRESS _InIter1 in;
  29   _LIBCPP_NO_UNIQUE_ADDRESS _OutIter1 out1;
  30   _LIBCPP_NO_UNIQUE_ADDRESS _OutIter2 out2;
  31
  32   template <class _InIter2, class _OutIter3, class _OutIter4>
  33     requires convertible_to<const _InIter1&, _InIter2>
  34           && convertible_to<const _OutIter1&, _OutIter3> && convertible_to<const _OutIter2&, _OutIter4>
  35   _LIBCPP_HIDE_FROM_ABI constexpr
  36   operator in_out_out_result<_InIter2, _OutIter3, _OutIter4>() const& {
  37     return {in, out1, out2};
  38   }
  39
  40   template <class _InIter2, class _OutIter3, class _OutIter4>
  41     requires convertible_to<_InIter1, _InIter2>
  42           && convertible_to<_OutIter1, _OutIter3> && convertible_to<_OutIter2, _OutIter4>
  43   _LIBCPP_HIDE_FROM_ABI constexpr
  44   operator in_out_out_result<_InIter2, _OutIter3, _OutIter4>() && {
  45     return {std::move(in), std::move(out1), std::move(out2)};
  46   }
  47 };
  48 } // namespace ranges
  49
  50 #endif // _LIBCPP_STD_VER >= 20
  51
  52 _LIBCPP_END_NAMESPACE_STD
  53
  54 #endif // _LIBCPP___ALGORITHM_IN_OUT_OUT_RESULT_H