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. Hans van der Meer met vriendelijke groet Hans van der Meer

On 24 Jan 2016, at 15:13, Pablo Rodriguez wrote:

On 01/24/2016 02:30 PM, dr. Hans van der Meer wrote:

...

I would like to differentiate on the following character being one of X or not X. But cannot get it right in \doifnextcharelse.

For example \def\mynextchar{\doifnextcharelse{X}{\def\Next{Y}}{\def\Next{Z}}\Next} delivers: ZX ZQ then input: \mynextchar X \mynextchar Q I hoped for YX ZQ, but it looks as if X tested false against X.

How to?

Hans,

the basic \def\mynextchar{\doifnextcharelse{x}{y}{z}} works.

With your sample:

\def\mynextchar{ \doifnextcharelse{X} {\def\Next{Y}\Next} {\def\Next{Z}\Next}}

I hope it helps,

Pablo -- http://www.ousia.tk

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