Re: Factory Pattern

[Maciej Sobczak <see.my.homepage@gmail.com>]

On 26 Lip, 13:01, Georg Bauhaus <rm.tsoh+bauh...@maps.futureapps.de>
wrote:

> > > Why is being case-insensitive and allowing full Unicode
> > > in identifiers schizophrenic?
>
> > Because the concept of "case" does not apply to all scripts.

Bingo, but not only. Some scripts do have the concept of "case", but
the mapping between upper-case and lower-case is not 1:1. Or even
better, the *length* of sequence changes with case. This introduces
some funny effects when trying to decide whether two sequences have
the same meaning. 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?
Or maybe is Ada case-insensitive only in the ASCII subset of Unicode?
Sorry, I don't call it "well-designed".

> How does the concept of "case" apply to '-' or '8' in 7bit ASCII?
> The schizophrenia is elsewhere, I'd say :-)

Yes. It's in the motivation.
We can make something case-insensitive in order to *reduce* the number
of characters that are effectively different; and we can provide
support for Unicode in order to *increase* the number of different
characters.
In my very humble opinion both are bad ideas (even separately).

--
Maciej Sobczak
http://www.msobczak.com/