The problem is that your first namespace defines 'sorted?' and your second
namespace just uses the namespace, thus overriding 'sorted?'. You have two
options here. Your biggest project is that you're using ':use'. Use
':require' instead. Something like `(:require
[random.learning.clojure.overridex :as overridex])`. Your second option is
to do the :refer-clojure dance in this namespace as well, but really you
should just use :require and qualify the namespace.
On Thursday, February 14, 2013 10:04:55 AM UTC-8, AtKaaZ wrote:
>
> Let's say I want to override clojure.core/sorted?
>
> (ns random.learning.clojure.overridex
> (:refer-clojure :exclude [sorted?]))
>
> (defn sorted? [coll]
> {:pre [ (coll? coll)]}
> (clojure.core/sorted? coll))
>
> I'm using Eclipse+counterclockwise, so loading this namespace(Ctrl+Alt+L)
> first time gives no warnings/errors, loading it second time, one warning
> and no errors, and subsequent times it's loaded there are no
> errors/warnings.
>
> the warning is this:
> WARNING: sorted? already refers to: #'clojure.core/sorted? in namespace:
> random.learning.clojure.overridex, being replaced by:
> #'random.learning.clojure.overridex/sorted?
>
> I could ignore the warning, no problem, but then I try to use this
> namespace in another namespace:
>
> (ns random.learning.clojure.usetheoverridexns
> (:use random.learning.clojure.overridex)
> )
>
> (and
> (= false (sorted? '(1 2)))
> (= true (sorted? (sorted-set 1 2))))
>
>
> When I load this namespace first time I get:
> WARNING: sorted? already refers to: #'clojure.core/sorted? in namespace:
> random.learning.clojure.usetheoverridexns, being replaced by:
> #'random.learning.clojure.overridex/sorted?
> true
> I could ignore that, but then I load it again(and any subsequent time) and
> this is an error (not just a warning that can be ignored):
>
> IllegalStateException sorted? already refers to:
> #'random.learning.clojure.overridex/sorted? in namespace:
> random.learning.clojure.usetheoverridexns
> clojure.lang.Namespace.warnOrFailOnReplace (Namespace.java:88)
>
> Notice there's no "true" aka return value.
>
> When I actually close the REPL, and Ctrl+Alt+L load only this latter
> namespace I get this:
>
> ;; Clojure 1.5.0-RC16
> ;; Switching to random.learning.clojure.usetheoverridexns namespace
> WARNING: sorted? already refers to: #'clojure.core/sorted? in namespace:
> random.learning.clojure.usetheoverridexns, being replaced by:
> #'random.learning.clojure.overridex/sorted?
> true
> *IllegalStateException sorted? already refers to:
> #'random.learning.clojure.overridex/sorted? in namespace:
> random.learning.clojure.usetheoverridexns
> clojure.lang.Namespace.warnOrFailOnReplace (Namespace.java:88)*
>
>
> and any subsequent loads, show only the part in bold.
>
> While this may be some ccw issue, I am probably also doing something
> wrong that I could be doing better.
> What is the way to do this? especially in the latter namespace which is
> using the namespace which has overridden the sorted?
> I do want the overridden "sorted?" to actually be available and override
> the clojure.core/sorted? in any namespaces that are using the overridex
> namespace.
>
>
> Thank you.
>
> --
> Please correct me if I'm wrong or incomplete,
> even if you think I'll subconsciously hate it.
>
>
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