samppi wrote:
> Are private multis possible? I notice that clojure.contrib.def does
> not have a defmulti-, which doesn't bode well, but it's still worth a
> question at the mailing list.
Yes, you can make any symbol private. If you look at the definition of
defn- you'll see all it does is set the :private metadata entry on the
function's name to true:
(defmacro defn-
"same as defn, yielding non-public def"
[name & decls]
(list* `defn (with-meta name (assoc (meta name) :private true)) decls))
This bears repeating as it may not be obious: symbols *themselves* are
set private, not the functions (or other values) they are bound to.
So you could do the same when defining a multimethod, just give the name
(symbol) of the method the metadata ":private" with the value "true":
(defmulti #{:private true} my-multi my-dispatch)
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