//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// shared_ptr
// template <class U> bool owner_before(weak_ptr<U> const& b) const noexcept;
#include <memory>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
const std::shared_ptr<int> p1(new int);
const std::shared_ptr<int> p2 = p1;
const std::shared_ptr<int> p3(new int);
const std::weak_ptr<int> w1(p1);
const std::weak_ptr<int> w2(p2);
const std::weak_ptr<int> w3(p3);
assert(!p1.owner_before(w2));
assert(!p2.owner_before(w1));
assert(p1.owner_before(w3) || p3.owner_before(w1));
assert(p3.owner_before(w1) == p3.owner_before(w2));
ASSERT_NOEXCEPT(p1.owner_before(w2));
return 0;
}