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// { dg-do run { target c++11 } }
// Copyright (C) 2011-2019 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/>.
// 20.6.7.2 uses-allocator construction
#include <memory>
#include <tuple>
#include <testsuite_hooks.h>
struct MyAlloc { };
// type that can't be constructed with an allocator
struct CannotUse
{
CannotUse(int) : ok(true) { }
bool ok;
};
// type that can be constructed with an allocator
// but which has uses_allocator == false
struct DoesNotUse
{
typedef MyAlloc allocator_type;
DoesNotUse(int) : ok(true) { }
DoesNotUse(std::allocator_arg_t, MyAlloc, int) : ok(false) { }
DoesNotUse(int, MyAlloc) : ok(false) { }
bool ok;
};
namespace std
{
template<typename A>
struct uses_allocator<DoesNotUse, A> : false_type { };
}
// type that can be constructed with an allocator as second argument
struct UsesWithTag
{
typedef MyAlloc allocator_type;
UsesWithTag(int) : ok(false) { }
UsesWithTag(std::allocator_arg_t, MyAlloc, int) : ok(true) { }
UsesWithTag(int, MyAlloc) : ok(false) { }
bool ok;
};
// type that can be constructed with an allocator as last argument
struct UsesWithoutTag
{
typedef MyAlloc allocator_type;
UsesWithoutTag(int) : ok(false) { }
UsesWithoutTag(int, MyAlloc) : ok(true) { }
bool ok;
};
template<typename TestType, typename... T>
bool test2(T... args)
{
using std::allocator_arg;
using std::tuple;
using std::get;
tuple<TestType, T...> t(allocator_arg, MyAlloc(), 1, args...);
return get<0>(t).ok;
}
template<typename... T>
void test(T... args)
{
VERIFY( test2<CannotUse>(args...) );
VERIFY( test2<DoesNotUse>(args...) );
VERIFY( test2<UsesWithTag>(args...) );
VERIFY( test2<UsesWithoutTag>(args...) );
}
int main()
{
test();
test(1);
test(1, 2);
return 0;
}
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