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.



On Sat, Jul 22, 2017 at 3:08 AM Phillip Lord <phillip.l...@newcastle.ac.uk>
wrote:

>
> 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
>
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