On 3 February 2010 17:14, Stephen C. Gilardi <[email protected]> wrote:
> I believe it's also possible to make the change backward compatible so
> arguments to the new require macro would work quoted or not. (by detecting
> and ignoring (quote ...) special forms in arguments).
That's a good idea! A simple-minded macro like the one I posted
previously would throw a totally unhelpful exception when used at the
REPL in the old way. A version amended to take this into account:
(defmacro require [& libspecs]
(let [lss (map (fn [spec]
(if (and (instance? clojure.lang.Cons spec)
(= 'quote (first spec)))
`(do (println "warning: use of quoted namespace
names with require is deprecated")
spec)
`'~spec))
libspecs)]
`(require* ~...@lss)))
This would of course still break any code actually depending on
require being a function, so it's only backward compatible in REPL
use...
Sincerely,
Michał
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