On Sep 5, 7:06 am, Christopher Taylor <[EMAIL PROTECTED]> wrote:
> Hi,
>
> this is my first post to the list (though I've been lurking for a
> while) and I'm not yet actively working with Clojure, so take what I
> say here with a grain of salt :).
>
> On Sep 4, 2008, at 3:28 PM, Rich Hickey wrote:
>
>
>
> > On Sep 3, 7:51 pm, Rich Hickey <[EMAIL PROTECTED]> wrote:
> >> On Sep 3, 5:14 pm, Chouser <[EMAIL PROTECTED]> wrote:
>
> >>> On Wed, Sep 3, 2008 at 4:36 PM, Stephen C. Gilardi
> >>> <[EMAIL PROTECTED]> wrote:
>
> >>>> I saw some discussion of how to fix this on the IRC log but I
> >>>> can't get on
> >>>> at the moment.
> >>>> It looks like the current plan is to change "ns" to remove the
> >>>> sensitivity
> >>>> to "the namespace is already defined" and add "(:refer-
> >>>> clojure ...)" to the
> >>>> list of supported reference arguments.
>
> >>> Well, here's a patch for the behavior discussed on IRC. I'm posting
> >>> it only because it's complete and working, not in any attempt to
> >>> stifle further discussion. If we settle on any alternate solution,
> >>> this patch can just be ignored.
>
> >> I think the only problem is in the case of subsequent use of ns. I
> >> originally envisioned the 'main' .clj file doing an involved ns and
> >> subsequent files just doing (ns foo), as well as the use of ns at the
> >> repl to change namespaces. Now, if you did
>
> >> (ns foo (:refer-clojure ...) ...)
>
> >> any later (ns foo) is going to bring in all of clojure. I'd prefer it
> >> did nothing but change *ns*.
>
> > After sleeping on it, I think what we have been calling ns should be
> > called defns instead, and ns should just set *ns*. Thus there should
> > be only one defns for any particular namespace, and (ns foo) can be
> > used to set the namespace for a file and/or change the namespace at
> > the repl.
>
> > Thoughts?
>
> So, if I understand this correctly, you'd have a file myns/myns.clj
> containing (defns myns) along with :require and/or :use clauses for
> the dependencies of the whole ns. Other files under myns/ would
> contain just the statement (ns myns).
>
Right.
> Personally, from a separations-of-concerns standpoint, I'd prefer if
> every file were responsible for getting access to all the libs it needs.
>
Being an interactive language, hanging such dependencies on files
doesn't really work, since bits and pieces of things originally
defined in files might be fixed/redefined in the repl etc. So the unit
of reference is the namespace, and all code in the same namespace
shares the same references and name resolution. This aids
introspection as well.
> Oh, one (tiny) niggle wrt the name "defns": it looks a bit like the
> plural form of "defn", so it might be confused with defmulti or
> something that defines a bunch of functions at once.
>
I didn't think about the plural angle - anyone else bothered by that?
The alternative is defnamespace.
Rich
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