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f1717362 | 1 | // Copyright (C) 2012-2016 Free Software Foundation, Inc. |
521b90ea | 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 } | |
8868286e | 19 | // { dg-options "-std=gnu++11" } |
521b90ea | 20 | |
21 | // libstdc++/52591 | |
22 | ||
23 | #include <vector> | |
65d8ffc2 | 24 | #include <memory> |
25 | #include <type_traits> | |
521b90ea | 26 | |
27 | // As an extension we allow move-assignment of std::vector when the element | |
28 | // type is not MoveAssignable, as long as the allocator type propagates or | |
29 | // is known to always compare equal. | |
30 | ||
31 | struct C | |
32 | { | |
33 | C& operator=(C&&) = delete; | |
34 | }; | |
35 | ||
65d8ffc2 | 36 | template<typename T> |
37 | struct A1 : std::allocator<T> | |
38 | { | |
39 | template<typename U> struct rebind { typedef A1<U> other; }; | |
40 | ||
41 | A1() = default; | |
42 | template<typename U> A1(const A1<U>&) { } | |
43 | ||
44 | using propagate_on_container_move_assignment = std::true_type; | |
45 | }; | |
46 | ||
521b90ea | 47 | void test01() |
48 | { | |
65d8ffc2 | 49 | using test_type = std::vector<C, A1<C>>; |
50 | static_assert(std::is_nothrow_move_assignable<test_type>::value, | |
51 | "vector is nothrow move-assignable if allocator propagates"); | |
52 | } | |
53 | ||
54 | template<typename T> | |
55 | struct A2 : std::allocator<T> | |
56 | { | |
57 | template<typename U> struct rebind { typedef A1<U> other; }; | |
58 | ||
59 | A2() = default; | |
60 | template<typename U> A2(const A2<U>&) { } | |
61 | ||
62 | using propagate_on_container_move_assignment = std::false_type; | |
141d9a97 | 63 | using is_always_equal = std::true_type; |
65d8ffc2 | 64 | }; |
65 | ||
65d8ffc2 | 66 | void test02() |
67 | { | |
68 | using test_type = std::vector<C, A2<C>>; | |
69 | static_assert(std::is_nothrow_move_assignable<test_type>::value, | |
70 | "vector is nothrow move-assignable if allocator is always equal"); | |
521b90ea | 71 | } |