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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc
1 // Copyright (C) 2019-2020 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // { dg-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
25 struct S
{ bool swapped
= false; };
26 constexpr void swap(S
& l
, S
& r
) { }
29 union U
{ char c
; int i
; };
30 constexpr void swap(U
& l
, U
& r
) { }
33 static_assert( std::swappable
<nu::S
> );
34 static_assert( !std::swappable
<const nu::S
> );
35 static_assert( std::swappable
<nu::T
> );
36 static_assert( !std::swappable
<const nu::T
> );
37 static_assert( std::swappable
<nu::U
> );
38 static_assert( !std::swappable
<const nu::U
> );