One big thing to consider is that core.match is closed dispatch. If you
write a function that uses core.match, I can't extend it inside my code.
This is something that is possible with both multi-methods and protocols.

Timothy

On Fri, May 15, 2015 at 12:49 PM, Sam Raker <[email protected]> wrote:

> The discussion/post-linked-to in
> https://groups.google.com/d/msg/clojure/eoAp6QVimYI/iipmEJNKdrIJ have got
> me thinking about protocols & multimethods, which I admittedly have
> possibly never actually used, now that I think about it. I'm wondering how
> they differ from core.match[1]. I realize protocols, specifically, have a
> niche for when you have concrete type information about your data and want
> better performance. I'm a little less clear about multimethods--in
> particular, I just considered using multimethods for something, and then
> ended up reaching for core.match because it seemed more closure-friendly.
>
> What, if any, are the benefits of using protocols/multimethods over
> core.match, or vice versa? When would you reach for one and definitely not
> the other(s)?
>
>
> [1] https://github.com/clojure/core.match
>
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