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// Copyright (C) 2018 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<char, std::char_traits<char>, alloc<char>>;
string s = "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 );
}
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