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// Copyright (C) 2016-2020 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++/56166
#ifndef _GLIBCXX_USE_CXX11_ABI
# define _GLIBCXX_USE_CXX11_ABI 0
#endif
#include <ext/vstring.h>
#include <new>
static int fail_after = -1;
template<typename T>
struct Allocator
{
using value_type = T;
// Need these typedefs because COW string doesn't use allocator_traits.
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using difference_type = long;
using size_type = unsigned long;
template<typename U>
struct rebind {
using other = Allocator<U>;
};
Allocator() { }
template<typename U>
Allocator(const Allocator<U>&) { }
T* allocate(size_type n)
{
if (fail_after >= 0) {
if (fail_after-- == 0) {
throw std::bad_alloc();
}
}
return (T*)new char[n * sizeof(T)];
}
void deallocate(T* p, size_type)
{
delete[] (char*)p;
}
};
template<typename T, typename U>
bool operator==(const Allocator<T>&, const Allocator<U>&) { return true; }
template<typename T, typename U>
bool operator!=(const Allocator<T>&, const Allocator<U>&) { return false; }
using string = __gnu_cxx::__versa_string<char, std::char_traits<char>,
Allocator<char>,
__gnu_cxx::__rc_string_base>;
string f()
{
string s1("xxxxxx");
string s2 = s1;
s1.clear();
return s2;
}
int main()
{
for (int i = 0; i < 10; i++) {
try {
fail_after = i;
f();
break;
} catch (const std::bad_alloc&) {
}
}
}
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