[XeTeX] not enough \XeTeXcharclass registers

[Joseph Wright]

On 31/01/2016 18:31, Philip Taylor wrote:
> Just as TeX has \maxdimen, it would be useful if derivatives of TeX such
> as XeTeX could add analogous environmental enquiries such as
> \maxXeTeXcharclass (or, less uglily but also less meaningfully,
> \XeTeXmaxcharclass).

\maxdimen isn't a primitive (though it's in the plain format).

Joseph