//===----------------------------------------------------------------------===// // // 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> // template<class T> class weak_ptr // { // public: // typedef T element_type; // ... // }; #include <memory> struct A; // purposefully incomplete int main() { static_assert((std::is_same<std::weak_ptr<A>::element_type, A>::value), ""); }