shared_ptr_example2.cpp

C++的一个好库。。。现在很流行

// Boost shared_ptr_example2 implementation file  -----------------------------//

//  Copyright Beman Dawes 2001.  Distributed under the Boost
//  Software License, Version 1.0. (See accompanying file
//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)


//  See http://www.boost.org/libs/smart_ptr for documentation.

#include "shared_ptr_example2.hpp"
#include <iostream>

class example::implementation
{
 public:
  ~implementation() { std::cout << "destroying implementation\n"; }
};

example::example() : _imp( new implementation ) {}

void example::do_something()
  { std::cout << "use_count() is " << _imp.use_count() << "\n"; }