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99dee823 | 1 | // Copyright (C) 2019-2021 Free Software Foundation, Inc. |
d355635e 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 | ||
18 | // { dg-do compile { target c++11 } } | |
19 | ||
20 | #include <tuple> | |
21 | #include <memory> | |
22 | ||
23 | struct X { }; | |
24 | ||
25 | struct Y | |
26 | { | |
27 | Y(const std::tuple<X>&) = delete; | |
28 | Y(std::tuple<X>&&) { throw 1; } | |
29 | Y(const X&) { } | |
30 | }; | |
31 | ||
32 | struct Z | |
33 | { | |
34 | Z(X&&) { } | |
35 | Z(const std::tuple<X>&) { throw 1; } | |
36 | Z(std::tuple<X>&&) = delete; | |
37 | }; | |
38 | ||
39 | void | |
40 | test01() | |
41 | { | |
42 | // PR libstdc++/90700 wrong constraints on constructor | |
43 | const std::allocator<int> a; | |
44 | const std::tuple<X> x; | |
45 | ||
46 | static_assert(!std::is_convertible<const std::tuple<X>&, Y>::value, ""); | |
47 | static_assert(!std::is_constructible<Y, const std::tuple<X>&>::value, ""); | |
48 | static_assert(!std::is_same<Y, X>::value, ""); | |
49 | // should use tuple<Y>::tuple<X>(allocator_arg_t, const A&, const tuple<X>&) | |
50 | // and construct Y from X: | |
51 | std::tuple<Y> y(std::allocator_arg, a, x); | |
52 | } | |
53 | ||
54 | void | |
55 | test02() | |
56 | { | |
57 | const std::allocator<int> a; | |
58 | std::tuple<X> x; | |
59 | ||
60 | static_assert(!std::is_convertible<std::tuple<X>, Z>::value, ""); | |
61 | static_assert(!std::is_constructible<Z, std::tuple<X>>::value, ""); | |
62 | static_assert(!std::is_same<Z, X>::value, ""); | |
63 | // should use tuple<Z>::tuple<X>(allocator_arg_t, const A&, tuple<X>&&) | |
64 | // and construct Z from X: | |
65 | std::tuple<Z> z(std::allocator_arg, a, std::move(x)); | |
66 | } |