Am Tue, 14 Jul 2015 09:42:13 +0100 schrieb Joseph Wright:



> I was thinking of

> 

>     \keys_define:nn {test}

>       {

>         testa .code:n = {\tl_show:n {#1}},

>         testa .value_required:,

>         testb .code:n = {\tl_show:n {#1}},

>         testb .value_required:,

>         testb .default:n = {}

>     }

> 

>     \keys_set:nn {test} {testa,testb}

> 

> where one might expect to get an error only in the first case. That's

> not currently the situation!



Hm. My first reaction was that it works as expected. If I explictly

require that the *user* gives a value, a *package* default doesn't

make sense and shouldn't replace the user action.



It is also consistent with the other way round:



\documentclass{article}

\usepackage{expl3}

\begin{document}

\ExplSyntaxOn

  \keys_define:nn {test}

      {

        testb .code:n = {#1},

        testb .value_forbidden:,

        testb .default:n = {xxx}

    }



   \keys_set:nn {test} {testb}



\end{document} 









-- 

Ulrike Fischer 

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