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52066eae | 1 | // { dg-do run { target c++11 } } |
aaf0ca6f | 2 | |
99dee823 | 3 | // Copyright (C) 2008-2021 Free Software Foundation, Inc. |
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4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
748086b7 JJ |
17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
aaf0ca6f | 19 | |
23df8534 | 20 | // 20.7.2.2 Class template shared_ptr [util.smartptr.shared] |
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21 | |
22 | #include <memory> | |
23 | #include <testsuite_hooks.h> | |
24 | ||
25 | struct A { }; | |
aaf0ca6f | 26 | |
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27 | int destroyed = 0; |
28 | struct B : A { ~B() { ++destroyed; } }; | |
29 | ||
23df8534 | 30 | // 20.7.2.2.1 shared_ptr constructors [util.smartptr.shared.const] |
aaf0ca6f | 31 | |
640cbe76 | 32 | // Construction from unique_ptr |
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33 | |
34 | template<typename From, typename To> | |
35 | constexpr bool constructible() | |
36 | { | |
37 | using namespace std; | |
38 | return is_constructible<shared_ptr<To>, unique_ptr<From>>::value | |
39 | && is_constructible<shared_ptr<const To>, unique_ptr<From>>::value | |
40 | && is_constructible<shared_ptr<const To>, unique_ptr<const From>>::value; | |
41 | } | |
42 | ||
43 | static_assert( constructible< A, A >(), "A -> A compatible" ); | |
44 | static_assert( constructible< B, A >(), "B -> A compatible" ); | |
45 | static_assert( constructible< int, int >(), "int -> int compatible" ); | |
46 | static_assert( !constructible< int, long >(), "int -> long not compatible" ); | |
47 | ||
48 | void | |
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49 | test01() |
50 | { | |
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51 | std::unique_ptr<A> up(new A); |
52 | std::shared_ptr<A> sp(std::move(up)); | |
53 | VERIFY( up.get() == 0 ); | |
54 | VERIFY( sp.get() != 0 ); | |
55 | VERIFY( sp.use_count() == 1 ); | |
a2e0054e | 56 | } |
aaf0ca6f | 57 | |
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58 | void |
59 | test02() | |
60 | { | |
61 | std::unique_ptr<B> b(new B); | |
62 | std::shared_ptr<A> a(std::move(b)); | |
63 | VERIFY( b.get() == 0 ); | |
64 | VERIFY( a.get() != 0 ); | |
65 | VERIFY( a.use_count() == 1 ); | |
66 | a.reset(); | |
67 | VERIFY( destroyed == 1 ); | |
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68 | } |
69 | ||
640cbe76 | 70 | int |
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71 | main() |
72 | { | |
73 | test01(); | |
a2e0054e | 74 | test02(); |
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75 | return 0; |
76 | } |