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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/30_threads/lock_guard/cons/deduction.cc
1 // Copyright (C) 2017-2021 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-do compile { target c++17 } }
22 template<typename T
, typename U
> struct require_same
;
23 template<typename T
> struct require_same
<T
, T
> { using type
= void; };
25 template<typename T
, typename U
>
26 typename require_same
<T
, U
>::type
34 check_type
<std::lock_guard
<std::mutex
>>(l
);
41 std::lock_guard
l2(m2
);
42 check_type
<std::lock_guard
<Mutex
>>(l2
);