[luatex] \lastnamedcs and \begincsname with empty csname

[David Carlisle]

On 7 January 2018 at 23:38, Hans Hagen <pragma at wxs.nl> wrote:
> On 1/7/2018 11:15 PM, David Carlisle wrote:
>
>> Should not \lastnamedcs expand to the token with empty csname after >
>> \csname\endcsname ?
>
> It's by design (an explicit test and nothing done with a null cs, so no
> cleanup side effects too) ... btw, it's already tricky enough this code and
> we're not going to change such functionality (just like we don't change
> other primitives with side effects).

OK, although the resulting behaviour is a bit odd, but can the manual
be fixed to describe the behaviour
as the current behaviour is not as described there.

thanks,

David