On Mon, Jan 25, 2010 at 10:52 PM, Zach Tellman <[email protected]> wrote:
> At the REPL, in 1.2.0-master
>
>> (meta (second '(a #^b c)))
> nil
>
> In 1.1.0-new (and I believe all previous versions)
>
>> (meta (second '(a #^b c)))
> {:tag b}
>
> Is this intentional, or a bug? Is the new type hint syntax being
> introduced in 1.2?
I think it's a bug, perhaps related to quoting behavior.
Everything seems to work okay before this commit:
commit 430dd4fa711d0008137d7a82d4b4cd27b6e2d6d1
Author: Rich Hickey <[email protected]>
Date: Tue Jan 19 14:25:26 2010 -0500
metadata for fns
Afterward:
(meta '#^a b)
;=> nil
(meta '#^{:foo :bar} [5 10])
;=> nil
(meta (first '[#^{:foo :bar} {}]))
;=> nil
This, however, works both before and after:
(meta #^{:foo :bar} [5 10])
;=> {:foo :bar}
Also, the problem appears to be related to 'eval' not 'read':
(second (read-string "(quote #^a b))"))
;=> b
(meta (second (read-string "(quote #^a b))")))
;=> {:tag a}
(eval (read-string "(quote #^a b))"))
;=> b
(meta (eval (read-string "(quote #^a b))")))
;=> nil
--Chouser
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