relational::operator bool()

[Richard B. Kreckel]

On Fri, 16 Nov 2001, Douglas Gregor wrote:
> I can guess at what the criterion would be for it to _not_ break on a given 
> platform:
>   1) sizeof(bool) == sizeof(pointer-to-member-function)
>   2) a NULL pointer-to-member has integral value 0
> 
> I would guess that the first condition does not hold for Linux-x86/GCC. I 
> seem to recall that pointers-to-members of polymorphic classes are "fat", 
> because they need to carry some run-time type information with them to deal 
> with the possibilities of multiple/virtual inheritance.

Questions of sizeof() aside, I guess it can't work at all because binaries
want `GiNaC::relational::operator bool(void) const' which the poor linker
cannt whip up fast enough...    :-)

Cheers
    -richy.
-- 
Richard B. Kreckel
<Richard.Kreckel at Uni-Mainz.DE>
<http://wwwthep.physik.uni-mainz.de/~kreckel/>