Re: BUG #1589: The whole concept of forces/move_with_forces/forces_holder needs to be rethought

[David Philippi]

On Monday 11 November 2002 01:57, Gervase Lam wrote:
> Each action, which is derived from PinguAction, can then override the
> virtual function.

What about two differnt actions needing the same overwrite? You'll have to 
duplicate it because you can't derive a virtual function from a class on the 
same level or you'll have to put an intermediate class between the two 
actions and PinguAction which does the override for both action classes.

> Isn't this tidier and therefore better than using member templates?  Or am
> I missing something?

What problem do you have with member templates? They'll create an 
implementation for every case they are instantiated with, that's all. A 
member template isn't very different from a free standing function template, 
it's only bound to a class scope and understanding templates in their 
variations is a key point in making C++ really powerfull.
Templates can be very difficult to understand but a simple member template 
shouldn't cause much problems. If you've got a general problem with templates 
- just ask.

Bye David