Re: how reliable is rendering of complex scripts?

[Eli Zaretskii]

> From: John Wiegley <address@hidden>
> Date: Mon, 05 Oct 2015 11:18:57 -0700
> 
> >>>>> Eli Zaretskii <address@hidden> writes:
> 
> > I meant ZWJ and ZWNJ the characters, U+200C and U+200D. Or did I
> > misunderstand you?
> 
> Ah, it was I who misunderstood, Eli. I don't use these characters when typing
> in Emacs, only when preparing texts in layout applications.
> 
> The ZWNJ seems to work fine, but the ZWJ does not produce the behavior
> documented here:
> 
>     http://persian.nmelrc.org/persianword/zwj.htm
> 
> That is, ZWJ does not extend the heh into a "heh do chesm" (heh with two
> eyes), it just adds space before or after the final-form (circular) heh.

I tried to fix that, but I'm not sure it helped.  Maybe I simply don't
understand how to write entries for composition-function-table.
Perhaps Handa-san could help.