1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <memory> 11 12 // template<class T> class weak_ptr 13 14 // weak_ptr(); 15 16 #include <memory> 17 #include <cassert> 18 19 struct A; 20 21 int main() 22 { 23 std::weak_ptr<A> p; 24 assert(p.use_count() == 0); 25 } 26