| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <mutex> |
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| 10 | |
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| 11 | // template <class Mutex> class lock_guard; |
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| 12 | |
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| 13 | // explicit lock_guard(mutex_type& m); |
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| 14 | |
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| 15 | #include <cassert> |
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| 16 | #include <mutex> |
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| 17 | #include <type_traits> |
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| 18 | |
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| 19 | #include "types.h" |
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| 20 | |
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| 21 | int main(int, char**) { |
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| 22 | MyMutex m; |
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| 23 | assert(!m.locked); |
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| 24 | std::lock_guard<MyMutex> lg(m); |
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| 25 | assert(m.locked); |
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| 26 | |
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| 27 | static_assert(!std::is_convertible<MyMutex, std::lock_guard<MyMutex> >::value, "constructor must be explicit" ); |
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| 28 | |
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| 29 | return 0; |
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| 30 | } |
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| 31 | |
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