| //===----------------------------------------------------------------------===// |
| // |
| // 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); |
| |
| #include <memory> |
| #include <cassert> |
| |
| 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(p2)); |
| assert(!w2.owner_before(p1)); |
| assert(w1.owner_before(p3) || w3.owner_before(p1)); |
| assert(w3.owner_before(p1) == w3.owner_before(p2)); |
| } |