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52066eae | 1 | // { dg-do compile { target c++11 } } |
ad269884 | 2 | |
8d9254fc | 3 | // Copyright (C) 2010-2020 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 | ||
20 | #include <utility> | |
21 | ||
22 | template <class T> | |
23 | struct C | |
24 | { | |
25 | T t_; | |
26 | ||
27 | C() { } | |
28 | ||
29 | template <class U, | |
30 | class = typename std::enable_if | |
31 | < | |
32 | !std::is_lvalue_reference<U>::value | |
33 | >::type> | |
34 | C(U&& u) : t_(std::forward<T>(std::move(u).get())) { } | |
35 | ||
36 | C(C&& c) : t_(std::forward<T>(c.t_)) { } | |
37 | }; | |
38 | ||
39 | template <class T> | |
40 | struct Derived | |
41 | : C<T> | |
42 | { | |
43 | Derived() { } | |
44 | Derived(Derived&& d) : C<T>(std::forward<C<T>>(d)) { } | |
45 | }; | |
46 | ||
47 | // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html | |
48 | // Test E. | |
49 | int main() | |
50 | { | |
51 | Derived<int> d; | |
52 | Derived<int> d2(std::move(d)); | |
53 | } |