15a83710eSEric Fiselier //===----------------------------------------------------------------------===//
25a83710eSEric Fiselier //
357b08b09SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
457b08b09SChandler Carruth // See https://llvm.org/LICENSE.txt for license information.
557b08b09SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
65a83710eSEric Fiselier //
75a83710eSEric Fiselier //===----------------------------------------------------------------------===//
85a83710eSEric Fiselier 
9*a7f9895cSLouis Dionne // UNSUPPORTED: no-threads
1048f35e07SEric Fiselier 
115a83710eSEric Fiselier // <mutex>
125a83710eSEric Fiselier 
135a83710eSEric Fiselier // template <class Mutex> class lock_guard;
145a83710eSEric Fiselier 
155a83710eSEric Fiselier // explicit lock_guard(mutex_type& m);
165a83710eSEric Fiselier 
175a83710eSEric Fiselier #include <mutex>
185a83710eSEric Fiselier 
main(int,char **)192df59c50SJF Bastien int main(int, char**)
205a83710eSEric Fiselier {
2148f35e07SEric Fiselier     std::mutex m;
2248f35e07SEric Fiselier     std::lock_guard<std::mutex> lg = m; // expected-error{{no viable conversion}}
232df59c50SJF Bastien 
242df59c50SJF Bastien   return 0;
255a83710eSEric Fiselier }
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