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From: "Jean-Pierre Rosen" <rosen.adalog@wanadoo.fr>
Subject: Re: 'with'ing and 'use'ing
Date: 2000/03/01
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As a known use-phile, I can't resist adding my 0.02 Euros...

Two issues:
1) Do not confuse using full names and forbidding use clauses. It is
perfectly possible to write full names while in the scope of a use clause
for a package. Sometimes, I use full names although I'm in scope simply
because I find that, for a particular name, I need a more accurate
description. Having a use clause leaves me the choice of the way I write it
on a case-by-case basis.

2) Use-phobes often consider only global "use", i.e. immediately following
the "with". The use clause is actually intended to open visibility only
where needed. My own preferred style is to put a use clause immediately
after the header of the innermost program unit that needs it *including when
the whole compilation unit needs it*, i.e. never after the with. For
example:

with Complex_Numbers, Text_IO;
package body Pack is
   use Complex_Numbers;  -- used everywhere in the package
   ...
   procedure Put (X : Some_Type) is
       use Text_IO;   -- Text_IO used only in this procedure
       ...
   end Put;
end Pack;

This really brings extra information, because you know precisely where each
package is actually used.

--
---------------------------------------------------------
           J-P. Rosen (Rosen.Adalog@wanadoo.fr)
Visit Adalog's web site at http://pro.wanadoo.fr/adalog