1 // { dg-options "-std=gnu++2a" }
2 // { dg-do compile { target c++2a } }
3 //
4 // Copyright (C) 2019-2020 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 //
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
20
21 #include <tuple>
22
23 constexpr bool
test_tuple()24 test_tuple()
25 {
26 auto ok = true;
27
28 std::tuple<int, double, double> t1(1, 3.1415, 2.7182);
29 std::tuple<int, double, double> t2(1, 4.1234, 3.3333);
30 t1.swap(t2);
31 std::swap(t1, t2);
32
33 return ok;
34 }
35
36 static_assert(test_tuple());
37