#_ comments the whole form, starting with parent just after #_ : #_(bla-bla
(bla-bla2 ... ) )
for example
(+ #_ (+
2 3 4 (* 1 2) )
1 2)
Will return 3, because form with (+ 2 3 ... ) will be ignored by reader
So it's restricted by 1 line like ;
Regards
Nikita Beloglazov
On Tue, Aug 3, 2010 at 10:35 PM, Meikel Brandmeyer <[email protected]> wrote:
> Hi,
>
> Am 03.08.2010 um 16:45 schrieb Yang Dong:
>
> > I've read the src of core.clj of Clojure 1.1.0. Originally I thought
> > the meaning of #_ is to comment the thing after it, sort of like `;'.
> > But the in the src of core.clj in 1.2.0-RC1. The definition of reduce
> > is overrided to use the internal-reduce function. The defn line, is
> > preceded by `#_'. But in 1.1.0, it's not preceded by this reader
> > macro. So, I'm confused...
>
> You are absolutely right. The #_ is kind of comment. And in fact the
> override with the internal reduce function is commented out (ie. it’s not
> active) in 1.2.
>
> Sincerely
> Meikel
>
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