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From: "Matthew Heaney" <mheaney@on2.com>
Newsgroups: comp.lang.ada
Subject: Re: Another Idea for Ada 20XX
Date: Tue, 4 Dec 2001 17:18:19 -0500
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"Wes Groleau" <wwgrol@sparc01.ftw.rsc.raytheon.com> wrote in message
news:3C0CF4E3.A53D20A7@sparc01.ftw.rsc.raytheon.com...
>
>
> Larry Kilgallen wrote:
> > If they simply used common type declarations, a lot of errors would
> > be detected.  If Meters is a new type and is used throughout, and
> > Feet is another new type, it becomes difficult to add them.
>
> But that's not enough to prevent 2 Meters * 2 Meters = 4 Meters
> nor to allow 10 minutes * 5 KPH = 833 Meters

You can always take away multipication:

  type Length_In_Meters_Type is new Float; --or whatever

  function "*" (L, R : Length_In_Meters_Type) return Length_In_Meters_Type
is abstract;