Am Fri, 12 Jun 2015 10:50:34 +0100 schrieb Joseph Wright:


>> Why is the T-branch executed in the second case? Is is a bug?
 
> Yes: 

That's a relieve. I was really very bewildered ;-)

Btw: I came across the problem because I was looking for a way to
get 

 \keys_set:nn { test } {type=\testvalue}

working, if \testvalue expands to a known choice. Is there some good
way to do it? 

\exp_args:Nnx\keys_set:nn { test } {type=\testvalue}
 
works but could lead to problems if more keys are in the list. 

> P.S. Will also look at your TeX-sx question on key setting!

Thanks, it is not pressing but imho a better solution than an
explicit "known" group would be fine. I already run into an error
when I forgot to put a key in this group ;-(. 

-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/