On 12 June 2010 04:51, Eugen Dück <eu...@dueck.org> wrote:
> I put the first part of my implementation online:
> http://read-eval-puke.blogspot.com/2010/06/icfp-2009-orbit-binary-file-reader.html
> so anyone who's interested do have a look.
Interesting, thanks!
> There's one question that came up when I implemented this. Is there a
> way to get the name of a clojure function, when all I have is the
> function object? Is it stored alongside the function? I didn't see any
> metadata or anything. Would I really have to reverse lookup the name
> in some namespace maps?
In 1.2, defn-created functions have :name metadata. I mean the fns
themselves, not only the Vars. In 1.1, functions can't have metadata
attached to them, so if you're planning to use that, this won't help.
At any rate, for whichever reason, fn-created functions currently have
no :name metadata even if explicitly given a name, e.g. (meta (fn foo
[] :foo)) => nil.
Still, one can interrogate a function to find out its name in the
following super-clumsy way (not to say there isn't a better way --
just my first shot):
(defn fn-name [the-fn]
(->> (.toString the-fn)
(.split #"\$")
next
second
(.split #"_")
first))
(fn-name (fn foo [] :foo))
; => "foo"
(fn-name (fn [] :foo))
; => "fn" ; generic response for anonymous fns
I wonder if perhaps the reflection api might provide a cleaner way to
get at this information...
Sincerely,
Michał
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