STL and Inheritance

[arunag]

I am using STL queue ie., std::queue<CData> DataQ.
and i am also using push(), pop(), front() of the queue.
My question is if i want to push or pop the queue objects of CDerivedData. Here CDerivedData is inherited from CData. Is this right thing??
Why i want this to do is in my queue i want to insert two kinds of objects..
or what would be the other method??
Aruna.

 

[DavesTips]

No this won't work. Your queue is storing CData objects, and if you assign a CDerivedData, the Derived bit will be sliced off. This is a C++ issue, not STL. You can store CData* in your queue, and then put a CDerivedData pointer there, that'll work. Generally speaking though it's not very efficient to store objects of any complexity themselves in a queue, there's a lot of copy constructors being called.
I just can't help it, I like MS...

 

[Cagliostro]

use std::queue<CData*> and push/popsome new CDerivedData Ion Filipski

filipski@excite.com

 

[DavesTips]

Yeah, like I said, but don't forget to delete them after you've popped them... Click here if this helped!
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