On Fri, Sep 25, 2009 at 4:49 PM, Constantine Vetoshev
wrote:
>
> Chris Houser has summarized the problem here more succinctly than I
> can: http://paste.lisp.org/display/87734
This is a syntax-quote expansion-timing issue, which is why
Meikel's solutions works. I think it would work the way you
On Sep 26, 7:35 am, Meikel Brandmeyer wrote:
> The problem is, that you quote the symbol you inject into the inner
> defmacro. Hence it does not get resolved. The solution in this case
> seems to be to syntax-quote the symbol correctly before injection.
> Replace the two ~'~ with ~~ and call the
Hi,
Am 25.09.2009 um 22:49 schrieb Constantine Vetoshev:
(defmacro def-with-db-macro [macro-name open-fn close-fn]
`(defmacro ~macro-name [[var# & open-args#] & body#]
`(let [~var# (apply ~'~open-fn [...@open-args#])]
(try
~...@body#
(finally (~'~close-fn ~var#))
Hi,
Am 26.09.2009 um 17:06 schrieb Constantine Vetoshev:
This seems indeed useless at a first glance, but looking down the
cause trace usually shows the real problem.
Full stack trace follows, although I still don't know what it means.
No message.
[Thrown class java.lang.ExceptionInInitiali
On Fri, Sep 25, 2009 at 8:48 PM, Constantine Vetoshev wrote:
>
> On Sep 25, 6:02 pm, John Harrop wrote:
> > I don't think you can use things like defmacro in a let.
>
> This works:
>
> (let [y 10]
> (defmacro m1 []
>`(list ~y)))
>
> (m1) =>
> (10)
Well, that's weirdly inconsistent. It shou
On Sep 25, 6:02 pm, John Harrop wrote:
> I don't think you can use things like defmacro in a let.
This works:
(let [y 10]
(defmacro m1 []
`(list ~y)))
(m1) =>
(10)
--~--~-~--~~~---~--~~
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On Fri, Sep 25, 2009 at 4:49 PM, Constantine Vetoshev wrote:
> (let [f1 #(inc %)]
> (defmacro m1 [x]
>`(~f1 ~x)))
>
> (m1 12)
> => No message.
> [Thrown class java.lang.ExceptionInInitializerError]
>
> The equivalent works in Common Lisp (Allegro CL and SBCL):
>
> (let ((f1 (lambda (y) (1+ y
