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// The LLVM Compiler Infrastructure
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
// <memory>
// weak_ptr
// template<class U> bool owner_before(const shared_ptr<U>& b) const noexcept;
#include <memory>
#include <cassert>
#include "test_macros.h"
int main()
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(w1.owner_before(p3) || w3.owner_before(p1));
assert(w3.owner_before(p1) == w3.owner_before(p2));