| 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 | // <memory> |
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| 10 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 11 | |
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| 12 | // template<class T> class weak_ptr |
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| 13 | |
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| 14 | // weak_ptr(shared_ptr<T>) -> weak_ptr<T> |
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| 15 | |
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| 16 | #include <memory> |
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| 17 | #include <cassert> |
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| 18 | |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | struct A {}; |
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| 22 | |
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| 23 | int main(int, char**) |
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| 24 | { |
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| 25 | std::shared_ptr<A> s(new A); |
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| 26 | auto w = std::weak_ptr(s); |
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| 27 | ASSERT_SAME_TYPE(decltype(w), std::weak_ptr<A>); |
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| 28 | assert(!w.expired()); |
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| 29 | assert(w.use_count() == 1); |
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| 30 | assert(w.lock().get() == s.get()); |
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| 31 | |
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| 32 | return 0; |
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| 33 | } |
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| 34 | |
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