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// { dg-do run { target c++14 } }
// Copyright (C) 2015-2019 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/>.
#include <experimental/memory>
#include <testsuite_hooks.h>
using std::experimental::observer_ptr;
struct B {};
struct D : B {};
void test01()
{
observer_ptr<int> a, b;
a = b;
VERIFY(a == b);
}
void test02()
{
int x{};
observer_ptr<int> a;
observer_ptr<int> b{&x};
VERIFY(a != b);
a = b;
VERIFY(a == b);
}
void test03()
{
int x{};
observer_ptr<const int> a;
observer_ptr<int> b{&x};
VERIFY(a != b);
a = b;
VERIFY(a == b);
}
void test04()
{
D x{};
observer_ptr<B> a;
observer_ptr<D> b{&x};
VERIFY(a != b);
a = b;
VERIFY(a == b);
}
constexpr bool test05_helper(observer_ptr<const int> a,
observer_ptr<const int> b)
{
a = b;
return (a.get() == b.get());
}
void test05()
{
static constexpr int x{};
constexpr observer_ptr<const int> a;
constexpr observer_ptr<const int> b{&x};
constexpr bool assigned = test05_helper(a, b);
VERIFY(assigned);
}
int main()
{
test01();
test02();
test03();
test04();
test05();
}
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