Object orientation - can you have too much of a good thing?
renggli at gmail.com
Sun Oct 28 19:24:18 UTC 2007
> Well, it is a long winded way of saying "yes, multimethod dispatch is
> nice". But as he points out, the same thing can be done with
> double-dispatch (visitor pattern etc.), which is what multimethod has
> to do anyway, at runtime. But having multimethod is less typing and
> more concise, which is worth something. I personally can't think of
> any concise way to add it to Smalltalk.
I did something like that a long time ago. I called it 'Functional
Pattern Matching' as I just attended a course about Haskell at that
time. In fact it is an implementation of multi-methods:
The documentation is a bit misleading. All the matching presented can
also be done on the arguments. The code itself probably doesn't work
with recent images anymore. Try with Squeak 3.6 or 3.7.
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