From: "Michael F. Yoder" <yoder@decada.zko.dec.com>
Subject: Re: Elimination of "use" clauses
Date: 1999/07/21
Date: 1999-07-21T00:00:00+00:00 [thread overview]
Message-ID: <3795D51F.128F6658@decada.zko.dec.com> (raw)
In-Reply-To: wccvhbe9hpr.fsf@world.std.com
Robert A Duff wrote:
> Robert is fond of saying that style rules shouldn't be absolute. Well,
> I usually agree, but here's one that I think really is absolute: Never,
> never use dotted notation in a function call if the function name is an
> operator symbol. If you have something that really needs to be
> distinguished that carefully, then you shouldn't give it a name like
> "+". Can anybody think of an example that shows I'm wrong?
How contrived and lame an example will you admit? :-)
I'm pretty sure I have some black-box tests somewhere that work as
follows. There's a package P to be tested that declares some
operators. Within the black-box test, I declare a package Q that
contains identically named operators which implement exactly the same
functions; but these use crude and simple (and hopefully obviously
correct) methods. Then the test contains code something like this:
for <lots of values of L and R> loop
Assert(P."+"(L, R) = Q."+"(L, R), "+ is wrong");
Assert(P."-"(L, R) = Q."-"(L, R), "- is wrong");
-- etc.
end loop;
The selection notation is needed because the operators are homographs
and both are used at the same time. Now if this weren't allowed I could
have made the operators in Q use a derived type, and added type
conversions at appropriate spots. But I only thought of this method
because you were threatening to make it necessary. :-)
--
----
Michael Yoder
next prev parent reply other threads:[~1999-07-21 0:00 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-01 0:00 Elimination of "use" clauses Dr. Neil C. Audsley
1999-07-01 0:00 ` Joe Wisniewski
1999-07-01 0:00 ` czgrr
1999-07-01 0:00 ` Ted Dennison
1999-07-02 0:00 ` czgrr
1999-07-02 0:00 ` Ted Dennison
1999-07-01 0:00 ` Samuel T. Harris
1999-07-02 0:00 ` Robert Dewar
1999-07-02 0:00 ` Samuel T. Harris
1999-07-02 0:00 ` Robert Dewar
[not found] ` <7ltl2q$mog$1@nnrp1.deja.com>
1999-07-08 0:00 ` Michael F. Yoder
1999-07-09 0:00 ` Richard D Riehle
1999-07-09 0:00 ` Michael F. Yoder
1999-07-09 0:00 ` Marin David Condic
1999-07-09 0:00 ` Robert Dewar
1999-07-09 0:00 ` Dale Stanbrough
1999-07-12 0:00 ` Robert Dewar
1999-07-12 0:00 ` Ted Dennison
1999-07-09 0:00 ` Michael F. Yoder
1999-07-14 0:00 ` Tucker Taft
1999-07-10 0:00 ` Simon Wright
1999-07-12 0:00 ` Robert Dewar
1999-07-08 0:00 ` R. Tim Coslet
1999-07-09 0:00 ` Robert Dewar
1999-07-09 0:00 ` tmoran
1999-07-02 0:00 ` Ted Dennison
1999-07-02 0:00 ` Stephen Leake
1999-07-02 0:00 ` Robert Dewar
[not found] ` <7ltus1$ah1@dfw-ixnews19.ix.netcom.com>
1999-07-13 0:00 ` Robert A Duff
1999-07-18 0:00 ` Richard D Riehle
1999-07-18 0:00 ` Dale Stanbrough
1999-07-20 0:00 ` Richard D Riehle
1999-07-19 0:00 ` Brian Rogoff
1999-07-20 0:00 ` Robert Dewar
1999-07-20 0:00 ` Brian Rogoff
1999-07-21 0:00 ` Ted Dennison
1999-07-21 0:00 ` Robert A Duff
1999-07-21 0:00 ` Robert Dewar
1999-07-21 0:00 ` Robert Dewar
1999-07-21 0:00 ` Brian Rogoff
1999-07-22 0:00 ` Robert Dewar
1999-07-22 0:00 ` Brian Rogoff
1999-07-22 0:00 ` Robert Dewar
1999-07-22 0:00 ` Brian Rogoff
1999-07-21 0:00 ` Robert A Duff
1999-07-21 0:00 ` Michael F. Yoder [this message]
1999-07-21 0:00 ` Robert A Duff
1999-07-23 0:00 ` Tucker Taft
1999-08-03 0:00 ` Richard D Riehle
1999-07-20 0:00 ` David Kristola
1999-07-18 0:00 ` jerry
1999-07-19 0:00 ` Vladimir Olensky
1999-07-20 0:00 ` Richard D Riehle
1999-07-20 0:00 ` Opaque Types (was Elimination of "use" clauses) David C. Hoos, Sr.
1999-07-20 0:00 ` Elimination of "use" clauses jerry
1999-07-19 0:00 ` Ted Dennison
1999-07-19 0:00 ` Tucker Taft
1999-07-19 0:00 ` Ted Dennison
1999-07-02 0:00 ` Ed Falis
1999-07-02 0:00 ` Ed Falis
1999-07-03 0:00 ` Joe Wisniewski
1999-07-03 0:00 ` Ed Falis
1999-07-03 0:00 ` Keith Thompson
1999-07-13 0:00 ` Peter Amey
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