| // Copyright (C) 2018-2021 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 } } |
| |
| // PR libstdc++/87749 |
| |
| #include <string> |
| #include <testsuite_hooks.h> |
| |
| bool oom = false; |
| |
| template<typename T> |
| struct alloc |
| { |
| using value_type = T; |
| |
| #if !_GLIBCXX_USE_CXX11_ABI |
| using size_type = unsigned long; |
| using difference_type = long; |
| using reference = T&; |
| using const_reference = T&; |
| using pointer = T*; |
| using const_pointer = const T*; |
| template<typename U> |
| struct rebind { using other = alloc<U>; }; |
| #endif |
| |
| int not_empty = 0; // this makes is_always_equal false |
| |
| alloc() = default; |
| template<typename U> |
| alloc(const alloc<U>&) { } |
| |
| T* allocate(unsigned long n) |
| { |
| if (oom) |
| throw std::bad_alloc(); |
| return std::allocator<T>().allocate(n); |
| } |
| |
| void deallocate(T* p, unsigned long n) |
| { |
| std::allocator<T>().deallocate(p, n); |
| } |
| }; |
| |
| template<typename T, typename U> |
| bool operator==(const alloc<T>&, const alloc<U>&) { return true; } |
| |
| template<typename T, typename U> |
| bool operator!=(const alloc<T>&, const alloc<U>&) { return false; } |
| |
| int main() |
| { |
| using string |
| = std::basic_string<wchar_t, std::char_traits<wchar_t>, alloc<wchar_t>>; |
| |
| string s = L"PR libstdc++/87749 a string that is longer than a short string"; |
| const auto ptr = s.c_str(); |
| oom = true; |
| string ss; |
| ss = std::move(s); // allocators are equal, should not allocate new storage |
| VERIFY( ss.c_str() == ptr ); |
| } |