Re: Why do I get: cannot declare variable 'sc' to be of abstract type...

[David Daney <ddaney at avtrex dot com>]

Johannes P. Schmidt wrote:
> Any recommendations on the best way to get the desired functionality?  (C2 which is an I2 interface yet inherits the implementation from C1).
>
> One way that seems to work is to add "C2::a() { C1::a(); }", but it doesn't seem quite right.

Speaking as a non-C++ language lawyer, I think that is what we have to 
do.  I guess this reinforces the fact that C++ is not java.

David Daney

> Thanks,
>
> Johannes Schmidt
> jschmidt@avtrex.com
> AOL IM: "Avtrex Jschmidt"
> cell 650-823-0462
> office 408-985-8600
> fax 408-516-8558
>  
> > -----Original Message-----
> > From: John Love-Jensen [mailto:eljay@adobe.com]
> > Sent: Tuesday, July 31, 2007 9:57 AM
> > To: David Daney; MSX to GCC
> > Cc: Johannes P. Schmidt
> > Subject: Re: Why do I get: cannot declare variable Œ sc¹ to be of abstract
> > type...
> >
> > Hi Dave,
> >
> > > I would think that I1::a() is not virtual because it is defined in the
> > super
> > class C1.  What is going on here?
> >
> > I1::a was defined in super class C1 for the C1 half of the multiple
> > inheritance (via C2::C1::I2::defined a), but the I2 half's (via
> > C2::I2::I1::pure virtual a) a has not been concretely defined anywhere up
> > that inheritance chain.
> >
> > HTH,
> > --Eljay