1 // { dg-do compile { target c++14 } }
2
3 // Copyright (C) 2015-2021 Free Software Foundation, Inc.
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
8 // Free Software Foundation; either version 3, or (at your option)
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
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
19
20 #include <experimental/memory>
21
22 using std::experimental::observer_ptr;
23
nontrivialnontrivial24 struct nontrivial {nontrivial() {}};
25 struct other {};
26 struct base {};
27 struct derived : base {};
28
29 static_assert(!std::is_trivially_constructible<
30 observer_ptr<nontrivial>>::value, "");
31 static_assert(std::is_trivially_copyable<
32 observer_ptr<nontrivial>>::value, "");
33 static_assert(std::is_trivially_destructible<
34 observer_ptr<nontrivial>>::value, "");
35
36 static_assert(std::is_constructible<
37 observer_ptr<nontrivial>, nontrivial*>::value,
38 "");
39 static_assert(std::is_constructible<observer_ptr<base>, base*>::value, "");
40 static_assert(std::is_constructible<observer_ptr<base>, derived*>::value, "");
41 static_assert(!std::is_constructible<observer_ptr<base>, other*>::value, "");
42 static_assert(std::is_constructible<
43 observer_ptr<base>, observer_ptr<base>>::value, "");
44 static_assert(std::is_constructible<
45 observer_ptr<base>, observer_ptr<derived>>::value, "");
46 static_assert(!std::is_constructible<
47 observer_ptr<base>, observer_ptr<other>>::value, "");
48
49 static_assert(!std::is_assignable<
50 observer_ptr<nontrivial>, nontrivial*>::value,
51 "");
52 static_assert(std::is_assignable<
53 observer_ptr<nontrivial>, observer_ptr<nontrivial>>::value,
54 "");
55 static_assert(std::is_assignable<observer_ptr<base>,
56 observer_ptr<base>>::value, "");
57 static_assert(std::is_assignable<observer_ptr<base>,
58 observer_ptr<derived>>::value, "");
59 static_assert(!std::is_assignable<
60 observer_ptr<base>, observer_ptr<other>>::value, "");
61 static_assert(std::is_assignable<observer_ptr<const int>,
62 observer_ptr<int>>::value, "");
63 static_assert(!std::is_assignable<observer_ptr<int>,
64 observer_ptr<const int>>::value, "");
65