Warp wrote:
>   I guess that you are not really instantiating an abstract class, or either
> you are doing something really weird which somehow is able to bypass the
> compiler checks (in which case you get UB, of course).

I don't know. I've seen it happen at runtime with "trying to invoke pure 
virtual function" on Windows, and now I'm getting some of the same sorts of 
messages from a Linux program (from a place where you're supposed to fill in 
as you port it, so not entirely unexpected).

If you had class Beta as a concrete child of abstract class Alpha, and you 
assigned a Beta to the Alpha (as in slicing it), the compiler would still 
complain when you tried to invoke the undefined function in Alpha, wouldn't it?

-- 
   Darren New, San Diego CA, USA (PST)
   There's no CD like OCD, there's no CD I knoooow!

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