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From: Richard Riehle <richard@adaworks.com>
Newsgroups: comp.lang.ada
Subject: Re: Ideas for Ada 200X
Date: Sat, 31 May 2003 11:59:20 -0700
Organization: AdaWorks Software Engineering
Message-ID: <3ED8FB88.4233154E@adaworks.com>
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Date: 2003-05-31T18:57:26+00:00
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Robert A Duff wrote:

> More importantly, a typical Ada program has hundreds of integer types,
> so putting "i" at the front of variable names doesn't tell you much of
> anything interesting.

In fact, we can put the type in front of a value using attribute notation
for disambiguation.   For example,

               type Signal is (Red, Yellow, Green);
               type Color is (Red, Orange, Yellow, Green, Blue, Indigo, Violet);

              -------------------

               for I in Red..Green loop ... end loop;

will be ambiguous when Red through Green are both directly visible.   Instead,
we might code,

               for I in Signal'Red .. Signal'Green   ...    end loop;

The language does not prevent me from using this notation even when it
is unnecessary.   So, if you really want to do something equivalent to
Hungarian notation, go ahead.   However, it is usually quite superfluous.

Richard Riehle

                       Oh, and I do realize there are better ways to
                       lay out the code in my example, but the example
                       is intended to illustrate a different point than good
                       coding practice.         RR