Re: HELP: renames and enum values

[Robert Dewar <robert_dewar@my-deja.com>]

In article <dale-F87224.15225009042000@news.rmit.edu.au>,
  dale <dale@cs.rmit.edu.au> wrote:
> Robert Dewar wrote:
>
> > subtype x is y;
> >
> > why isn't that good enough for renaming purposes????
>
> ...because beginners don't think of it?
>
> Is there any reason why it shouldn't work? (apart from being
another
> way to accomplish the same thing), i.e. is there some
fundamental
> philosoply embedded in Ada that means it would be a Bad Thing?




Sorry, I don't know what you mean by "another way" here, this
is the ONE and ONLY method to get the effect of "renaming"
types, and is absolutely standard Ada, and yes it works fine.

And who knows what beginners might or might not think of, but
any decent Ada book should point out this standard usage. The
RM of course is quite clear on the semantic effect of such
a declaration, and that's the end of its responsibility, the
RM gives the (fairly) formal definition of the language, it is
not in the business of pointing out how it can be used :-)


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