[luatex] a question about the names \Umathcharnumdef etc

[David Carlisle]

On 16 October 2015 at 09:04, Ulrike Fischer <luatex at nililand.de> wrote:
> Am Fri, 16 Oct 2015 08:53:40 +0100 schrieb David Carlisle:
>
>> Just goes to show how confusing this prefixing stuff is, will be
>> simpler going forward
>> as latex doesn't prefix things "luatex" and luatex is prefixing less
>> things with "pdf":-)
>
> Yes, that will be easier. But the danger is naturally that it is
> getting more difficult to see that something is a primitive. Module
> prefixes like in expl3 have their use ...
>
> Are all these \Umath etc primitives using the same syntax in both
> engines?
>

Mostly.

there are some edge cases where one works and the other gives an error
compare on this for example

https://github.com/davidcarlisle/utex/blob/master/testfiles/udelcode-002.lvt

But I think in all cases where they both give a reasonable result, the
result is the same.

(I think I've reported all the things shown up by the tests in
https://github.com/davidcarlisle/utex/
to one engine tracker all the other although I haven't checked recently)

David