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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <shared_mutex>
// template <class Mutex> class shared_lock;
// shared_lock& operator=(shared_lock const&) = delete;
#include <shared_mutex>
#if _LIBCPP_STD_VER > 11
std::shared_timed_mutex m0;
std::shared_timed_mutex m1;
#endif // _LIBCPP_STD_VER > 11
int main()
{
#if _LIBCPP_STD_VER > 11
std::shared_lock<std::shared_timed_mutex> lk0(m0);
std::shared_lock<std::shared_timed_mutex> lk1(m1);
lk1 = lk0;
#else
# error
#endif // _LIBCPP_STD_VER > 11
}
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