[Interest] Container members in abstract base class?

André Somers andre at familiesomers.nl
Wed May 22 16:21:13 CEST 2013

Op 22-5-2013 16:03, Jonathan Greig schreef:
>          BaseObject* base = (BaseObject*)item;
>          if(base) { base->setObjectRubberPoint(key, point); }
The above looks suspicious. The cast you're doing here is unsafe. Your 
check on base on the second line is useless, as the C-style cast you're 
using doesn't do any checking. So, my suspicion is that your item isn't 
a BaseObject, and thus the method call you make into it is going to 
fail. Use a dynamic_cast<BaseObject*>(item) for your cast instead. That 
cast _ will_  result in a 0 pointer if the cast fails.


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