Ah Steve got to it first. Thanks!

On Friday, December 23, 2011, Steve Miner <[email protected]> wrote:
>
> On Dec 22, 2011, at 10:54 PM, Herwig Hochleitner wrote:
>
> I want to match vectors of the form [(some expr) :as :label], but
 #(match [%] [[expr :as (label :when keyword)]] {:expr expr :label label})
throws a compiler exception: Unable to resolve symbol expr
>
> If you want to match a literal keyword that has a special meaning to
match, you need to quote it. (It's always safe to quote the keyword
literals when in doubt.)  Also, I think your :when test should be keyword?
(to make sure something is a keyword, rather than creating one).  The
following works for me:
> (match [['(some expr) :as :label]]
>    [[expr ':as (label :when keyword?)]] {:expr expr :label label})
> ;=> {:expr (some expr), :label :label}
>
> --
> Steve Miner
> [email protected]
>
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