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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