Re: Factory Pattern

["Randy Brukardt" <randy@rrsoftware.com>]

"Maciej Sobczak" <see.my.homepage@gmail.com> wrote in message
news:1185454958.105983.143570@l70g2000hse.googlegroups.com...
...
> In the case-insensitive programming language I would
> expect that changing the "case" of one character in the identifier
> will not change its semantics. How Ada guarantees this for Unicode?

It uses the Unicode-defined case mapping tables. And yes, this can change
the length of things. So what?

We used the Unicode-defined tables because that way we let the experts in
these scripts make the decisions, not us language designers.

If you really care how these things are defined, check out the standard
clauses 2.1 and 2.3:

http://www.adaic.com/standards/05rm/html/RM-2-1.html
http://www.adaic.com/standards/05rm/html/RM-2-3.html

2.3(5-5.3/2) defines how identifiers are compared for equality; 2.1 defines
the various character categories. The wording is more obtuse that we would
have liked because we couldn't reference Unicode normatively (it is not an
ISO standard).

> Or maybe is Ada case-insensitive only in the ASCII subset of Unicode?

No, Ada is case-insensitive across the entire range of Unicode characters.

> Sorry, I don't call it "well-designed".

Well, that's your choice, but it would be better informed if you understood
the rules in question first.

                                            Randy.