[NTG-context] LMTX MkIV difference in expansion

[Wolfgang Schuster]

Rik Kabel schrieb am 19.11.2020 um 21:20:
> Another LMTX/MkIV difference, this time with expansion:
> 
>     \define\Align{yes}
>     \starttext
>     \startalignment[\Align]
>          This works with MkIV but fails with LMTX, complaining: {\tt
>          tex error on line 3 in file G:/expand.mkvi: The file ended
>          when scanning an argument.}
>     \blank
>         It works in both when \tex{def} or \tex{defineexpandable} is
>         used instead of \tex{define}.
>     \blank
>         What changed?
>     \stopalignment
>     \stoptext
> 
> It may well be that I have been abusing some laxity in MkIV and that 
> LMTX is a bit stricter in what it accepts, but I would like to know if 
> this is an expected difference.

You have to wait for Hans to get an answer but here is a minimal example.

\starttext

\protected\def\testparameter{test}
%\def\testparameter{test}

\def\test[#1]%
   {\expandafter\let\expandafter\testargumentlist\csname#1\endcsname}

\test[\testparameter]

\stoptext

Wolfgang