libstdc++-v3/testsuite/30_threads/unique_lock/cons/60497.cc

// { dg-do compile { target c++11 } }

// Copyright (C) 2014-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// libstdc++/60497

#include <mutex>
#include <memory>

struct A;
template<typename  T> struct B { T t; };

template<typename Dummy>
struct Lockable
{
  void lock();
  void unlock();
  bool try_lock();
};

using test_type = Lockable<std::unique_ptr<B<A>>>;

void test01()
{
  test_type l;
  std::unique_lock<test_type> ul(l);
}

void test02()
{
  test_type l1, l2, l3;
  std::lock(l1, l2, l3);
}

void test03()
{
  test_type l1, l2, l3;
  std::try_lock(l1, l2, l3);
}