A2. (instance? clojure.lang.IRecord (Foo.)) On 12 December 2012 14:53, Andy Fingerhut <andy.finger...@gmail.com> wrote: > I haven't dug into the details, but this Clojure ticket looks like it might > be related, if not the same issue: > > http://dev.clojure.org/jira/browse/CLJ-1105 > > It has been vetted by Stuart Halloway, so patches are welcome, but likely > wouldn't get in until after Clojure 1.5 is released (my guess). > > Andy > > On Dec 12, 2012, at 11:42 AM, Ben Wolfson wrote: > >> Given something like this: >> >> (defrecord F [a]) >> >> This fails: >> >> (clojure.walk/postwalk identity [(F. 1)]) >> >> because although (coll? (F. 1)) is true, (empty (F. 1)) fails ("can't >> create empty"). >> >> I've had to write an alternative to walk anyway (it discards >> metadata), and I'd like it to be able to accommodate this case more >> elegantly than calling empty and catching the exception if the object >> happens to be a record. (I suppose the best way would be to define >> walk in terms of something like fmap, so that individual records could >> decide whether they can be recursed into or not, but that might be >> overkill.) >> >> So: >> >> Q1: is this a bug in walk? >> Q2: is there a way to tell if something is an instance of a class >> created with defrecord? > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en
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