gls

GLS - Generic Little (Object, Type, Anything, ...) System

It provides multiple dispatch for Racket.

Differences from Swindle:

• Doesn't force you to change all. GLS is a small collection with a dozen of functions in API. It only adds generic functions.

• It based upon types, not classes. You may dispatch you function on any predicate you may imagine: exact-integer?, (real-in 0 10), (and? stream? (not/c stream-empty?)), ...

GLS is based on Greg Sullivan's GLOS, that was witten for scheme48. It has the same API, but without implemetation of own object system (glos-records). So GLS is not "generic little object system", but simply "generic little system". But I added support for racket/class: you may use class intead of type predicate and GLS corretly supports subtypes (subclasses).

Sorry for bad documentation: for API look into main.rkt, for examples of use -- test.rkt.

Some description of GLOS is in the paper ref-dyn-patterns.

Also, slides in proglangsandsofteng work through some examples using GLOS.

P.S. If at least two men need this, I'll write documentation and try to develop stable extensible API. Put your requests to issues.