Hi, > On Nov 7, 3:48 pm, Stuart Halloway <[EMAIL PROTECTED]> wrote: >> The following macro in lancet defines an ant task. >> >> (defmacro define-ant-task [task-name] >> `(def ~(symbol task-name) (create-ant-task ~task-name))) >> >> (At least) one of the following assumptions is wrong: >> >> (1) define-ant-task needs to be a macro so it can drop args into def. >> >> (2) define-ant-task needs to be a function because task-name needs to >> be evaled on the way in. >> >> (3) using eval (which would solve the contradiction in 1 & 2) is evil >> and should be avoided. >>
As Rich pointed out, its unclear what you are trying to do, so I'm making assumptions here, but this strikes me as similar to something I encountered. I believe I got what I needed by wrapping an unquoted let around the syntax-quote in order to force evaluation: (defmacro definte-ant-task [task-name] (let [evaled-task-name task-name] ;; Force evaluation of task-name `(def ~(symbol evaled-task-name) (create-ant-task ~evaled-task-name)))) Using (eval) will work, but I agree, it feels wrong to use eval which is why I sought after this solution here. /mike. --~--~---------~--~----~------------~-------~--~----~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
