Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

xropi

Real-time type information

This topic is 5903 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Here is my problem:
    

class T {          // base class

public:
};

class TA : public T {
private:
  double md_num;
public:
};

class TB : public T {
private:
  bool mb_xx;
public:
};

void AnyFunction() {
  TA  Ta, Tb;
  T   *pT1, *pT2;

  pT1 = &TA;

  // now we want to deep-copy pT1 to have it in pT2

  pT2 = new ???actual typeinfo needed??? (*pT1);   // I don't know what to write there

}
    
What's the solution? Should I define some virtual new that investigate the exact type and then utilizes the appropriate copy constructor or what? If I had something like GetRunTimeType(instance) "function" with type returned, I would be saved but I haven't find any usable keyword in my MSDN. Please, help me! [edited by - xropi on October 17, 2002 9:22:17 AM]

Share this post


Link to post
Share on other sites
Advertisement
quote:
Original post by SabreMan
Use the "virtual constructor" or "clone" idiom. See: The C++ FAQ Lite for details.


I use MS VC6.0 which doesn't support "covariant return types" used with virtual Clone() so I have to return a pointer to my base class. Not so nice, but it works. Thank you.



[edited by - xropi on October 17, 2002 10:44:24 AM]

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

GameDev.net is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!