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a5544970 | 1 | // Copyright (C) 2017-2019 Free Software Foundation, Inc. |
046a8476 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 | ||
14d8a912 JW |
18 | // { dg-do run { target c++11 } } |
19 | ||
046a8476 JW |
20 | // libstdc++/80893 |
21 | ||
22 | #include <vector> | |
23 | #include <testsuite_allocator.h> | |
24 | ||
25 | struct DereferencedInvalidPointer { }; | |
26 | ||
27 | // User-defined pointer type that throws if a null pointer is dereferenced. | |
28 | template<typename T> | |
29 | struct Pointer : __gnu_test::PointerBase<Pointer<T>, T> | |
30 | { | |
31 | using __gnu_test::PointerBase<Pointer<T>, T>::PointerBase; | |
32 | ||
33 | T& operator*() const | |
34 | { | |
35 | if (!this->value) | |
36 | throw DereferencedInvalidPointer(); | |
37 | return *this->value; | |
38 | } | |
39 | }; | |
40 | ||
41 | // Minimal allocator using Pointer<T> | |
42 | template<typename T> | |
43 | struct Alloc | |
44 | { | |
45 | typedef T value_type; | |
46 | typedef Pointer<T> pointer; | |
47 | ||
48 | Alloc() = default; | |
49 | template<typename U> | |
50 | Alloc(const Alloc<U>&) { } | |
51 | ||
52 | pointer allocate(std::size_t n) | |
53 | { | |
54 | if (n) | |
55 | return pointer(std::allocator<T>().allocate(n)); | |
56 | return nullptr; | |
57 | } | |
58 | ||
59 | void deallocate(pointer p, std::size_t n) | |
60 | { | |
61 | if (n) | |
62 | std::allocator<T>().deallocate(p.value, n); | |
63 | } | |
64 | }; | |
65 | ||
66 | template<typename T> | |
67 | bool operator==(Alloc<T>, Alloc<T>) { return true; } | |
68 | ||
69 | template<typename T> | |
70 | bool operator!=(Alloc<T>, Alloc<T>) { return false; } | |
71 | ||
72 | int main() | |
73 | { | |
74 | std::vector<bool, Alloc<bool>> v(0); | |
75 | std::vector<bool, Alloc<bool>> w(v); | |
76 | } |