Re: Unicode in strings

Stefan Monnier <monnier@iro.umontreal.ca> writes:
[Anton Ertl:]

I meant character, not code point, as should have become clear from
the following.  I think that Thomas Koenig meant "character", too, but
he may have been unaware of the difference between "character" and
"Unicode code point".

>
I don't know of any language (or even library) that supports the notion
of "character" for Unicode strings.

My experiments with Telugu suggest that Emacs understands the concept
of a character at least for the Telugu script (in contrast to
decomposed Umlauts).  If I press a cursor key in Telugu text, Emacs
advances to the next character, not the next code point.  However, if
I press DEL or BS, it delets a code point.

Here's some text again for playing around with it:

తెలుగు లిపి

Anyway, the Emacs Lisp functions right-char (and, after testing, also
left-char, forward-char, and backward-char) support the notion of
character at least for some scripts.  That may be the result of an
interaction with the redisplay code that you mention later, but in
that case it's that code that knows about characters in Unicode.

- anton
--
'Anyone trying for "industrial quality" ISA should avoid undefined behavior.'
  Mitch Alsup, <c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>