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From: Adrian Knoth <adi@thur.de>
Newsgroups: comp.lang.ada
Subject: Re: character matching
Date: 15 Aug 2004 21:02:21 GMT
Organization: loris.TV
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Ludovic Brenta <ludovic.brenta@insalien.org> wrote:

> type Category is (Whitespace, Punctuation, Letter, Digit, Other);

I support Steve's suggestion. Yours has the advantage of showing
how simple things can be done. I guess this is useful for learning
purposes but may contain more mistakes than the Annex-A-solution ;)


>       when others =>                              return Other;

> (note that in Ada, a "case" statement is required to process all
> possible values of the case_expression (here, C); the compiler will
> tell you if you forgot some values, unless as above you use "when
> others").

Which is considered BAD because when you change the range of a type
your case still works but may misbehave for the new values. Without
the "when others"-line the compiler forces you to adapt your routines
to the new range.

I know you know that, it's just for the original poster (John?).


-- 
mail: adi@thur.de  	http://adi.thur.de	PGP: v2-key via keyserver

Wie kommts das am Ende des Geldes noch soviel Monat �brig ist?