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52066eae | 1 | // { dg-do compile { target c++11 } } |
ad269884 | 2 | |
99dee823 | 3 | // Copyright (C) 2010-2021 Free Software Foundation, Inc. |
ad269884 PC |
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 | ||
6d0dff49 | 20 | // { dg-error "static assertion failed" "" { target *-*-* } 89 } |
ad269884 PC |
21 | |
22 | #include <utility> | |
23 | ||
24 | template <class T> | |
25 | struct C | |
26 | { | |
27 | T t_; | |
28 | ||
29 | C() {} | |
30 | ||
31 | explicit C(const T& t) : t_(t) { } | |
32 | ||
33 | template <class U, | |
34 | class = typename std::enable_if | |
35 | < | |
36 | std::is_convertible<U, T>::value | |
37 | >::type> | |
38 | C(C<U>&& c) : t_(std::forward<T>(c.t_)) { } | |
39 | }; | |
40 | ||
41 | class B; | |
42 | ||
43 | class A | |
44 | { | |
45 | int data_; | |
46 | ||
47 | friend class B; | |
48 | public: | |
49 | explicit | |
50 | A(int data = 1) | |
51 | : data_(data) { } | |
52 | ||
53 | ~A() { data_ = -1; } | |
54 | ||
55 | void test() const | |
56 | { | |
57 | __builtin_abort(); | |
58 | } | |
59 | }; | |
60 | ||
61 | class B | |
62 | { | |
63 | int data_; | |
64 | public: | |
65 | explicit | |
66 | B(int data = 1) | |
67 | : data_(data) { } | |
68 | ||
69 | B(const A& a) : data_(a.data_) { } | |
70 | ||
71 | B(A&& a) : data_(a.data_) { a.data_ = 100; } | |
72 | ||
73 | ~B() { data_ = -1; } | |
74 | ||
75 | void test() const | |
76 | { | |
77 | __builtin_abort(); | |
78 | } | |
79 | }; | |
80 | ||
81 | // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html | |
82 | // Test F. | |
83 | int main() | |
84 | { | |
85 | A a(3); | |
86 | C<A> ca(a); | |
87 | C<const B&> cb(std::move(ca)); | |
88 | cb.t_.test(); | |
89 | } |