> Meer, Hans van der <mailto:H.vanderMeer@uva.nl>
> 24. Januar 2016 um 15:58
> Yes this works. But alas, the ultimate goal is to test against several 
> characters and that seems impossible to do with standard ConTeXt 
> api-macros.Let alone when these characters are . or . or ) etc.
\startluacode

function checknextstring(str)
     if str == "a" then
         context("A")
     elseif str == "b" then
         context("B")
     else
         context("??")
     end
end

interfaces.implement { name = "readnextstring", actions = 
checknextstring,   arguments = "string" }

\stopluacode

\unprotect
\let\readnextstring\clf_readnextstring
\protect

\starttext

\readnextstring c
\readnextstring b
\readnextstring a
\readnextstring {xx}

\stoptext

Wolfgang