[plt-scheme] PLT object system

Thanks for the info.

Is there a "constructor"  mechanism, i.e. a procedure that is invoked
each time each new, instantiate or make-object is invoked?

Cheers,
David

On Wed, Feb 16, 2005 at 06:10:51PM -0500, Matthias Felleisen wrote:
> 
> On Feb 16, 2005, at 5:30 PM, David J. Neu wrote:
> 
> >  For list-related administrative tasks:
> >  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> >
> >Hi,
> >
> >Is there a way to specify a set of fields that a class must implement
> >using the PLT object system (i.e. class.ss)?
> >
> >>From the documentation: "An interface is a collection of method names
> >to be implemented ..."., is there a similar thing for a set of field
> >names?
> 
> Come to a neighborhood near you real soon, or so they say. But don't 
> hold your breath.
> 
> >If not how do you do this - define a superclass that contains the
> >required fields and derive a new class from it?
> 
> Yes.
> 
> -- Matthias
> 
> P.S. And today I just wrote a macro that makes such fields public.