On 11.05.2009, at 23:17, samppi wrote: > user=> (defmacro b [& xs] > `(with-monad maybe-m (m-seq ~xs))) > #'user/b > user=> (b [1 2 3]) > java.lang.IllegalArgumentException: Wrong number of args passed to: > LazilyPersistentVector (NO_SOURCE_FILE:0) > > So there's something wrong with how I'm phrasing the macro. But I > can't figure out what's going on.
The best way to find out is macroexpand-1: (macroexpand-1 '(b [1 2 3])) -> (clojure.contrib.monads/with-monad clojure.contrib.monads/maybe-m (clojure.contrib.monads/m-seq ([1 2 3]))) So what you are feeding to m-seq is a list containing a vector. The solution is: (defmacro b [xs] `(with-monad maybe-m (m-seq ~xs))) (b [1 2 3]) -> (1 2 3) Or, if you prefer: (defmacro b [& xs] `(with-monad maybe-m (m-seq ~...@xs))) Konrad. --~--~---------~--~----~------------~-------~--~----~ 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 clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
