aaa I see! How can I be so naive some times? ;)
Jim
On 21/02/13 14:15, AtKaaZ wrote:
=> (def component? number?)
#'runtime.q/component?
=> (defmacro defcomponent [name co]
`(do
(assert (component? ~co) "Not a valid IComponent")
(def ~name ~co)
)
)
#'runtime.q/defcomponent
=> (defcomponent a (str "a"))
AssertionError Assert failed: Not a valid IComponent
(runtime.q/component? (str "a")) runtime.q/eval6570 (NO_SOURCE_FILE:1)
=> (defcomponent a "a")
AssertionError Assert failed: Not a valid IComponent
(runtime.q/component? "a") runtime.q/eval6572 (NO_SOURCE_FILE:1)
=> (defcomponent a 1)
#'runtime.q/a
=> (defcomponent a (+ 1 3))
#'runtime.q/a
On Thu, Feb 21, 2013 at 3:11 PM, AtKaaZ <atk...@gmail.com
<mailto:atk...@gmail.com>> wrote:
or you could place the assert inside the backquote
On Thu, Feb 21, 2013 at 3:10 PM, Jim foo.bar <jimpil1...@gmail.com
<mailto:jimpil1...@gmail.com>> wrote:
On 21/02/13 14:07, Jim foo.bar wrote:
Hi all,
I''d like to have a macro like the following but
preferably without the 'eval' inside the assertion form:
(defmacro defcomponent [name co]
(assert (component? (eval co)) "Not a valid IComponent")
`(def ~name ~co))
If I don't use eval, everything works as long as I pass a
var in...However if I pass in something like (String.
"jam") it is not being evaluated and thus is a list not an
object...and it will never satisfy IComponent.
any thoughts?
thanks in advance :)
Jim
I could have phrased this better...One of my arguments has to
NOT be evaluated (name) but the other needs to be evaluated
(co) so I can assert whatever I want to assert on it...I
cannot use 'defn' (it will cause 'name' to be evaluated) so my
only option is a macro that forces eval on the second arg, yes?
Jim
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