[XeTeX] Hyphenation of supplementary characters in Xe(La)TeX ?

[Jonathan Kew]

On 21 Jan 2009, at 05:52, Kenneth Reid Beesley wrote:

>
> I'm using Xe(La)Tex to typeset a book in supplementary characters  
> (Deseret Alphabet),
> and I need to define some hyphenation (to begin with, just a few  
> dozen cases in \hyphenation{}).
>
> I understand that a character is not considered a letter, and is  
> therefore not visible to
> hyphenation, unless it has a non-zero lccode.   In the old 16-bit- 
> limited days, you could
> specify things like
>
> \lccode"2019="0027"
>
> to make the official Unicode apostrophe (U+2019) act like the ASCII  
> apostrophe as far as
> hyphenation is concerned.  Or just
>
> \lccode"2019="2019
>
> to make sure that it has a non-zero lccode.  The problem was that  
> even XeTeX 0.996 was
> limited to 16-bit BMP characters.
>
> With 0.997, XeTeX was supposed to handle hyphenation for  
> supplementary characters.
> (I've now got 0.999)
>
> Question:  What is the syntax for specifying a supplementary- 
> character code point value in
> \lccode?
>>

Just the same as for BMP characters. So, for example,

   \lccode"10400="10428
   \lccode"10401="10429
   ....
   \lccode"10428="10428
   \lccode"10429="10429
   ....etc.

However, you should find that these are already set appropriately  
based on the Unicode character properties in the standard xetex and  
xelatex formats. (They're included in the unicode-letters.tex file  
that is loaded during format creation.) Have you tried

   \showthe\lccode"10400

to see what it reports?

JK