After discussing with a couple of folks in IRC (big thank you to hyPiRion for
his help), I opened a ticket to address this bug here:
http://dev.clojure.org/jira/browse/CLJ-1181
Long story short, ((formatter-out "~<#(~;~@{~w~^ ~_~}~;)~:>") nlis) expects
nlis to be a sequence, but in the case of (^:once fn* [x] x) it is a symbol.
Thanks,
--
'(Devin Walters)
On Sunday, March 10, 2013 at 3:36 PM, Devin Walters wrote:
> Could anyone help me understand why the following code is breaking?
>
> (require '[clojure.pprint :refer [with-pprint-dispatch code-dispatch pprint]])
> (with-pprint-dispatch code-dispatch (pprint (read-string "(^:once fn* [x]
> x)")))
>
> IllegalArgumentException Don't know how to create ISeq from:
> clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
> #(
>
> The "#(" is not a typo. It starts to print and then fails. Looking at the
> code, it looks like there's an issue here:
> (defn- pprint-anon-func [alis]
> (let [args (second alis)
> nlis (first (rest (rest alis)))]
> (if (vector? args)
> (binding [*symbol-map* (if (= 1 (count args))
> {(first args) "%"}
> (into {}
> (map
> #(vector %1 (str \% %2))
> args
> (range 1 (inc (count args))))))]
> ((formatter-out "~<#(~;~@{~w~^ ~_~}~;)~:>") nlis))
> (pprint-simple-code-list alis))))
>
>
>
> I squinted at it for a bit, but I'm not sure what's up. Anyone have any ideas?
>
> Thanks,
> --
> '(Devin Walters)
>
--
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