一个类如何防止被拷贝

   Effective C++:条款06

  若不想使用编译器自动生成的函数，就该明确拒绝 .

老式写法：

class noncopyable  {  protected:      noncopyable() {}      ~noncopyable() {}  private:      noncopyable( const noncopyable& );      noncopyable& operator=( const noncopyable& );  };  

C++11写法：

class noncopyable  {  protected:      //constexpr noncopyable() = default;     // ~noncopyable() = default;      noncopyable( const noncopyable& ) = delete;      noncopyable& operator=( const noncopyable& ) = delete;  };  

转载：

http://blog.csdn.net/flyfish1986/article/details/43305363