> On Sat, Dec 19, 2009 at 3:58 PM, Stuart Halloway > <stuart.hallo...@gmail.com> wrote: >> In Clojure it is idiomatic to have optional args at the front of the >> signature. This makes it easy to define convenient caller APIs, but >> it >> leads to bulky let forms like this one (from clojure.core/defmulti)
There's clojure.contrib.def/name-with-attributes for the frequent case of a def-ing macro that takes an optional docstring and/or attribute map: (defn name-with-attributes "To be used in macro definitions. Handles optional docstrings and attribute maps for a name to be defined in a list of macro arguments. If the first macro argument is a string, it is added as a docstring to name and removed from the macro argument list. If afterwards the first macro argument is a map, its entries are added to the name's metadata map and the map is removed from the macro argument list. The return value is a vector containing the name with its extended metadata map and the list of unprocessed macro arguments." [name macro-args] ...) 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 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