You are right, i noticed "it calls withMeta", but in the expression,
actually use with-meta to define with-meta, it's very strange, thank you
very much!
(def with-meta (fn ^:static with-meta [^clojure.lang.IObj x m]
(. x (withMeta m))))
On Saturday, September 21, 2013 3:30:30 PM UTC+8, Michał Marczyk wrote:
>
> Actually with-meta's definition does not refer to with-meta. Rather,
> it calls withMeta, a method in the clojure.lang.IObj interface which
> the first argument to with-meta is supposed to implement.
>
> Cheers,
> Michał
>
>
> On 21 September 2013 09:01, <ljcp...@gmail.com <javascript:>> wrote:
> > Hi,
> > I read the source about with-meta, and find def with-meta using
> with-meta,
> > can it? someone give a explain?
> >
> > user=> (source with-meta)
> > (def
> > ^{:arglists '([^clojure.lang.IObj obj m])
> > :doc "Returns an object of the same type and value as obj, with
> > map m as its metadata."
> > :added "1.0"
> > :static true}
> > with-meta (fn ^:static with-meta [^clojure.lang.IObj x m]
> > (. x (withMeta m))))
> >
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