| // Copyright (C) 2014-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do run { target c++11 } } |
| |
| // libstdc++/59829 |
| |
| #include <vector> |
| #include <testsuite_allocator.h> |
| |
| // User-defined pointer type that throws if a null pointer is dereferenced. |
| template<typename T> |
| struct Pointer : __gnu_test::PointerBase<Pointer<T>, T> |
| { |
| using __gnu_test::PointerBase<Pointer<T>, T>::PointerBase; |
| |
| T& operator*() const |
| { |
| if (!this->value) |
| throw "Dereferenced invalid pointer"; |
| return *this->value; |
| } |
| }; |
| |
| // Minimal allocator using Pointer<T> |
| template<typename T> |
| struct Alloc |
| { |
| typedef T value_type; |
| typedef Pointer<T> pointer; |
| |
| Alloc() = default; |
| template<typename U> |
| Alloc(const Alloc<U>&) { } |
| |
| pointer allocate(std::size_t n) |
| { return pointer(std::allocator<T>().allocate(n)); } |
| |
| void deallocate(pointer p, std::size_t n) |
| { std::allocator<T>().deallocate(p.operator->(), n); } |
| }; |
| |
| template<typename T> |
| bool operator==(Alloc<T> l, Alloc<T> r) { return true; } |
| |
| template<typename T> |
| bool operator!=(Alloc<T> l, Alloc<T> r) { return false; } |
| |
| int main() |
| { |
| std::vector<int, Alloc<int>> a; |
| (void) a.data(); |
| } |