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40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
// { dg-options "-std=gnu++17" }
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// { dg-do compile { target c++17 } }
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// Copyright (C) 2017-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <variant>
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template<typename T, typename U> struct require_same;
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template<typename T> struct require_same<T, T> { using type = void; };
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template<typename T, typename U>
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typename require_same<T, U>::type
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check_type(U&) { }
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void
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test01()
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{
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std::variant<int, double> x(3);
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std::variant copy = x;
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check_type<decltype(x)>(copy);
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std::variant move = std::move(x);
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check_type<decltype(x)>(move);
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}
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