On 12/06/2015 21:49, Ulrike Fischer wrote:
> Am Fri, 12 Jun 2015 19:12:07 +0100 schrieb Joseph Wright:
> 
>> On 12/06/2015 11:58, Ulrike Fischer wrote:
> 
>>> That's a relieve. I was really very bewildered ;-)
>>
>> Glad I could help: is a release urgent?
> 
> No.  
>>
>>> 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. 
>>
>> Like other keyval systems, l3keys does no expansion of the key or value
>> when parsing: that's by-design.
> 
> I know ;-). But sometimes it would be useful to be able to set a
> choice or a boolean key through a tl or bool variable and not
> explicitly. 
> 
> Btw: This doesn't work either
> 
> \documentclass{article}
> \usepackage{expl3}
> \begin{document}
> \ExplSyntaxOn
> 
> \def\testvalueA{A}
> 
> \keys_define:nn {test}
>  {
>   type    .choices:nn = { A , B , \testvalueA }
>    {
>     blub
>    },
>  }
> 
> \keys_set:nn { test } {type=\testvalueA}
> 
> \ExplSyntaxOff
> %Error
> \end{document}
>  
> 

Problem identified: will also be fixed in an update (I'll send later today).
--
Joseph Wright