class arithmetic?

[Steffen Grunewald]

Hi,

is it possible to *remove* classes, or define new ones depending on 
existing ones? (Say, I want to remove a generic class if I later find out
that some special case would apply to this particular machine.)
I know about "ifclass CLASS" and its usage with && and || operators; 
how to combine them (in the same sense as #if (defined(A) && (defined(B)) )?

Cheers,
 Steffen

-- 
Steffen Grunewald * MPI Grav.Phys.(AEI) * Am Mühlenberg 1, D-14476 Potsdam
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