Re: [ANN] clojure.java.jdbc 0.7.0 Beta 2

[Phillip Lord]

I am confused about how to exclude clojure.core from a namespace already
exists. That is, I have not just created the namespace, but it's been
given to me by a tool.

Consider, for example:




lein repl
nREPL server started on port 41054 on host 127.0.0.1 - nrepl://127.0.0.1:41054
REPL-y 0.3.7, nREPL 0.2.12
Clojure 1.8.0
OpenJDK 64-Bit Server VM 1.8.0_131-8u131-b11-0ubuntu1.16.04.2-b11

user=> (refer-clojure :only [])
nil
user=> (defn some[])
WARNING: some already refers to: #'clojure.core/some in namespace: user, being replaced by: #'user/some
#'user/some
user=>


Now, why do I get this warning? Surely some is not being replaced at
all, since the refer-clojure form should have removed some
clojure.core/some from the current namespace.

Phil

[Phillip Lord]

Apologies, didn't mean to follow that thread!

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[Justin Smith]

refer-clojure doesn't ever remove mappings, it only adds them

The reason a refer-clojure clause in your ns form can prevent bindings is because your refer-clojure clause (which is likely more qualified than the default) overrides the args that ns would otherwise provide to refer-clojure.

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[Phillip Lord]

Yep, appears that you are right. I ended with this:

(doseq
[[k v] (ns-map ns)
:when (= (find-ns 'clojure.core) (:ns (meta v)))]
(ns-unmap ns k))

which is pretty ugly.