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From: "Jean-Pierre Rosen" <rosen.adalog@wanadoo.fr>
Subject: Re: Why both "with" and "use"?
Date: 1999/02/16
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Date: 1999-02-16T00:00:00+00:00
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Ed Falis a �crit dans le message <1103_919091637@DZOG-CHEN>...
>On Mon, 15 Feb 1999 10:14:39 +0100, "Jean-Pierre Rosen"
<rosen.adalog@wanadoo.fr> wrote:
>
>> Nope. Import is equivalent to a "use" clause (makes directly
visible),
>> but is in no way required to get accessibility.
>> You can use anything without any "import" if you use expanded
names.
>> (which implies that it is almost impossible to know which modules
are
>> required by a given module).
>
>Unless you're using a modern IDE, like Visual Age for Java, an Eiffel
or Smalltalk IDE, or ObjectAda (and I believe GNAT Ada mode in Emacs?)
>
>The point being, where should the tradeoff be between clutter in the
code and tool support?  How much does it make sense to mechanize vs
doing a lot of
>bookkeeping in the source code itself?
>
>After using a variety of the tools above in the last year or so, I'm
finding I don't miss fully-qualified names and context clauses in
environments that don't use them.  In
>fact, it's a relief not having to deal with them as when using Ada
bindings to large API sets like the JDK.
>
I agree with you (I'm a known supporter of the use clause), but I
think you misunderstood my remark.

I was stating that in Java, the whole world is "withed" (and this can
include modules on a server on an island in the Pacific).
To know what is really used, import clauses are not sufficient, you
also need to check all fully qualified names. And if you rewrote your
own dynamic loader, I don't see how you can know what is really used !
(BTW, this implies that configuration management in Java is a
world-wide issue !!)
I doubt ObjectAda provides this feature, since (fortunately) we have
"with" clauses in Ada !
---------------------------------------------------------
           J-P. Rosen (Rosen.Adalog@wanadoo.fr)
Visit Adalog's web site at http://perso.wanadoo.fr/adalog