//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <memory>
// template<class T> class weak_ptr
// weak_ptr();
#include<memory>#include<cassert>structA;intmain(){std::weak_ptr<A>p;assert(p.use_count()==0);}