Suppose that 'future-fact' is a macro. Its declaration is this: (defmacro future-fact [& forms] ...
Here's a use of the macro: (future-fact "some text" (+ 1 2)) The metadata on the (+ 1 2) form will contain the line number. However, consider this: (future-fact "some text") Strings don't get line numbers attached to them, so there's no way for the future-fact code to find a line number to report. (Let's assume that, in this context, you can't make a throwable and look in its stack.) However: the macroexpansion comes after a list is read. That list (I bet) *does* have a line number on it. So if the definition of future-fact could somehow be this: (defmacro future-fact [& forms] (let [lineno (:line (meta ...some-way-to-get-the-original-call-form...))] ...)) ... I could get a good line number. Is there any way to get the original call form? Something like &env? Some hook into the reader? ----- Brian Marick, Artisanal Labrador Contract programming in Ruby and Clojure Author of /Ring/ (forthcoming; sample: http://bit.ly/hfdf9T) www.exampler.com, www.exampler.com/blog, www.twitter.com/marick -- 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
