[luatex] Correct use of \overwithdelims?

[Khaled Hosny]

On Thu, Jul 15, 2010 at 03:56:18PM +0930, Will Robertson wrote:
> Hi,
> 
> We're in territory in which I'm a little unfamiliar, so please
> excuse the questions. What is the correct way to use \overwithdelims
> with LuaTeX?
> 
> In Plain and XeTeX, the brackets enlarge satisfactorily (see
> attached example), based on (so I read) fontdimens 20 & 21. In
> LuaTeX with both Cambria and XITS, the brackets remain small.

>From the TeXBook, p. 152:

The size of the surrounding delimiters depends only on the style, not on
the size of the fractions; larger delimiters are used in styles D and D
(see Appendix G). 

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer