Hi Michael
On Fri, Sep 30, 2011 at 4:51 PM, Michael Jaaka <michael.ja...@googlemail.com
> wrote:
> Btw. I'm using [match "0.2.0-SNAPSHOT"] and Clojure 1.3 but this
> import instruction
>
> (use '[match.core :only [match]])
>
> from official website of match library doesn't work, only (use
> '[clojure.core.match.core :only [match ] ]) works
>
Thanks, fixed.
>
> and I have given a try to matchure and IT WORKS ;-)
>
Good to hear :)
> But why do I have to define question character as a prefix on
> destruction variables?
> This doesn't help in any way and I doubt that is helps matchure too.
>
>From the perspective of core.match, some trickery is involved to know
whether to create a new local binding, or to perform an equals test. We look
at the surrounding scope at compile time to determine this.
Another way would be for the user to provide such information, which seems
to be the way matchure has gone, with prefix ? (speculative, I don't
actually know the reasons behind the decision)
Example: (core.match)
(let [x [1 2 3]
a 1
b 2
]
(match [x]
[[b a c & as]] :first ;; b and a are local, perform = test,
create new binding c
[[a b c & as]] :second ;; same, but successful match
))
Thanks,
Ambrose
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