I tried this and it works, but I need 2 backticks and I'm essentially
generating the assert-form when the macro is called...I'd like to
generate only the def-form at run-time...
(defmacro defcomponent [name co]
`(assert (component? ~co) "Not a valid IComponent")
`(def ~name ~co))
it looks ugly doesn't it?
Jim
On 21/02/13 14:11, AtKaaZ 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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Please correct me if I'm wrong or incomplete,
even if you think I'll subconsciously hate it.
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