On 08/02/2012 03:05, Asim Jalis wrote:
I frequently find myself passing around maps that are basically structs. I use this macro to destructure the fields into let variables.; Macro. (defmacro def-fields [struct-name & fields] (let [field-symbol-vector (->> fields (map name) (map symbol) vec) arg (gensym) body (gensym) macro-name (symbol (str "let-" struct-name))] `(defmacro ~macro-name [~arg & ~body] `(let [{:keys ~'~field-symbol-vector} ~~arg] ~@~body)))) ; How to use it. (def-fields person :first-name :last-name :city) (defn print-person [p] (let-person p (println "First name:" first-name) (println "Last name:" last-name) (println "City:" city))) (def person1 {:first-name "John" :last-name "Smith" :city "San Francisco"}) (print-person person1)
I haven't come around macros yet, but when I'll tackle the subject (soon) your example will be useful. Nice! Now I understand a little more the notion of extensible language.
-- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
