How to implement 'class methods'

How to implement 'class methods'

[Andreas Rottmann]

Hi!

I wonder how one could implement 'class methods' (like C++ static
methods) in GOOPS. I'd like to call them like this:

(static-method <a-class> "argument")

where <a-class> would be the class the method belongs to.

I could use 

(define-method (a-method (<class> c) args) (do-something))

but this would get invoked for all calls that pass a class as first
argument and I'd have to test if the 'right' class is passed and then
use (next-method) if not.

Regards, Andy
-- 
Andreas Rottmann         | Dru@ICQ        | 118634484@ICQ | a.rottmann@gmx.at
http://www.8ung.at/rotty | GnuPG Key: http://www.8ung.at/rotty/gpg.asc
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Re: How to implement 'class methods'

[Andreas Rottmann]

Andreas Rottmann <a.rottmann@gmx.at> writes:

> Hi!
> 
> I wonder how one could implement 'class methods' (like C++ static
> methods) in GOOPS. I'd like to call them like this:
> 
> (static-method <a-class> "argument")
> 
> where <a-class> would be the class the method belongs to.
> 
> I could use 
> 
> (define-method (a-method (<class> c) args) (do-something))
> 
> but this would get invoked for all calls that pass a class as first
> argument and I'd have to test if the 'right' class is passed and then
> use (next-method) if not.
> 
Oops, this one should rather go to -user. CC'd.

Andy
-- 
Andreas Rottmann         | Dru@ICQ        | 118634484@ICQ | a.rottmann@gmx.at
http://www.8ung.at/rotty | GnuPG Key: http://www.8ung.at/rotty/gpg.asc
Fingerprint              | DFB4 4EB4 78A4 5EEE 6219  F228 F92F CFC5 01FD 5B62

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Re: How to implement 'class methods'

[Neil Jerram]

>>>>> "Andreas" == Andreas Rottmann <a.rottmann@gmx.at> writes:

    Andreas> Andreas Rottmann <a.rottmann@gmx.at> writes:
    >> Hi!
    >> 
    >> I wonder how one could implement 'class methods' (like C++ static
    >> methods) in GOOPS. I'd like to call them like this:
    >> 
    >> (static-method <a-class> "argument")
    >> 
    >> where <a-class> would be the class the method belongs to.
    >> 
    >> I could use 
    >> 
    >> (define-method (a-method (<class> c) args) (do-something))
    >> 
    >> but this would get invoked for all calls that pass a class as first
    >> argument and I'd have to test if the 'right' class is passed and then
    >> use (next-method) if not.
    >> 
    Andreas> Oops, this one should rather go to -user. CC'd.

I don't think this is supported yet.

I think the right way to do it would be to add `eql' specializers to
GOOPS.

        Neil


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