On 9/5/2021 10:14 AM, Hans van der Meer via ntg-context wrote:
There is something I do not understand in the passing of parameters from
TeX to LuaTex.
This is my TeX definition:
\def\ListSort[#1]#2{\directlua{hvdm.listsort([===[#2]===],[===[#1]===])}}
tex haalt de {} rond #2 weg
Calling \ListSort[sep={ + }]{} delivers the string 'sep={ + }' into
LuaTeX as the printout in the logfile shows and as intended.
However in \ListSort[{ + }]{} the braces have disappeared and
transferred is nothing more than '+ '.
Why is the transfer messing up the character string I am passing by
removing the outer braces? Is this a bug or is it an unavoidable
consequence of the TeX-LuaTeX interface?
\starttext
\def\foo#1{\detokenize{#1}} \foo{hvdm has to read the tex book}
\def\foo#+{\detokenize{#1}} \foo{hvdm has to read the luametatex
manual}
\stoptext
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Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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