(C++) Answer of exercise #10: Obtaining a read-only (smart?) pointer

This is the answer of Exercise #10: Obtaining a read-only (smart?) pointer.


#include <boost/checked_delete.hpp>

#include <boost/shared_ptr.hpp>



struct MyStruct

{

  int m_x;



  private:

  ~MyStruct() {}

  friend void boost::checked_delete<>(MyStruct *);

};



struct MyStructKeeper

{

  MyStructKeeper() : m_s(new MyStruct) {}

  const MyStruct * Get() const { return m_s.get(); }

  private:

  boost::shared_ptr<MyStruct> m_s;

};



int main()

{

  MyStructKeeper k;

  const MyStruct * s = k.Get(); //Should be required to write 'const MyStruct'

  const int x = s->m_x; //Must compile

  //s->m_x = 0; //Should not compile

  //delete s;   //Should not compile

}

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.