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83ffe9cd | 1 | // Copyright (C) 2015-2023 Free Software Foundation, Inc. |
3625264f JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
6458742a | 18 | // { dg-do run { target c++17 } } |
7cc9022f | 19 | // { dg-require-effective-target hosted } |
3625264f JW |
20 | |
21 | #include <memory> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | #if __cpp_lib_enable_shared_from_this < 201603 | |
25 | # error "__cpp_lib_enable_shared_from_this < 201603" | |
26 | #endif | |
27 | ||
28 | struct X : public std::enable_shared_from_this<X> { }; | |
29 | ||
208b8b69 JW |
30 | static_assert( noexcept(std::declval<X&>().weak_from_this()) ); |
31 | static_assert( noexcept(std::declval<const X&>().weak_from_this()) ); | |
32 | ||
3625264f JW |
33 | void |
34 | test01() | |
35 | { | |
36 | std::shared_ptr<X> sp(new X); | |
37 | auto wp1 = sp->weak_from_this(); | |
38 | std::weak_ptr<X> wp2 = sp; | |
39 | ||
40 | std::owner_less<> less; | |
41 | VERIFY( !less(wp1, wp2) && !less(wp2, wp1) ); | |
42 | VERIFY( !less(wp1, wp2) && !less(wp2, wp1) ); | |
43 | } | |
44 | ||
45 | int | |
46 | main() | |
47 | { | |
48 | test01(); | |
49 | } |