Hi Carlo,
Thanks. Now it is fine.
Regards,
Mamun
On Tuesday, October 23, 2012 5:24:41 AM UTC+2, Carlo wrote:
>
> Hey Mamun,
>
> Your problem is that your ^{:test true} metadata isn't being applied
> to your functions, as you might expect, but rather to the var that is
> pointing to the function. You can see this in the following (#' is a
> shorthand to get the var rather than the thing it contains).
>
> user=> (meta f1)
> nil
> user=> (meta #'f1)
> {:arglists ([]), :ns #<Namespace user>, :test true, :name f1, :line 1,
> :source "(clojure.core/defn ^{:test true} f1 [] (println \"Call f1
> fn\"))\n", :file "NO_SOURCE_PATH"}
>
> You can solve this in two ways:
>
> 1) Have `f*` contain a list of symbols, then use `resolve` [1] to get
> the vars. Then the definition of `f*` becomes `(def f* (list 'f1
> 'f2))`
>
> 2) Have `f*` contain a list of vars
>
> Once you have the vars then you can use `(-> form meta :test)` to
> access the value for the :test metadata.
>
> Due to the way vars are implemented, calling `(form)` when `form` is a
> var will actually call the function that `form` is pointing to, so the
> earlier function call should continue to work.
>
> I hope that helps!
>
> Carlo
>
> [1]:
> http://clojure.github.com/clojure/clojure.core-api.html#clojure.core/resolve
>
> On Tue, Oct 23, 2012 at 1:30 AM, Mamun <[email protected] <javascript:>>
> wrote:
> > Hi All,
> >
> > I've a application with following structure. Now I would like to access
> meta
> > data of f1 and f2 within process function.
> >
> > (defn ^{:test true} f1 []
> > (println "call f1 fn"))
> >
> > (defn ^{:test false} f2 []
> > (println "call f2 fn"))
> >
> > (def f* (list f1 f2))
> >
> > (defn process [form]
> > (do
> > //Would like to access meta data of form
> > (println (str "-->" form))))
> >
> > (map #(process %1) f*)
> >
> > Does any one have any idea?
> >
> >
> > Regards,
> > Mamun
> >
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