Hello,
take the following PlainTeX file:
%&luatex
\def\recatcode#1{%
\directlua0{%
tex.sprint('\luaescapestring{\unexpanded{#1}}')%
texio.write_nl('\luaescapestring{\unexpanded{#1}}')%
}%
}
\recatcode{%
\def\test#1{`#1'}%
}
\bye
This results in
This is LuaTeX, Version snapshot-0.30.0-2008093018 (Web2C 7.5.7)
(MacroParameterCharacter.tex
\def \test ##1{`##1'}
! Parameters must be numbered consecutively.
<to be read again>
##
l.1 \def \test ##
1{`##1'}
\recatcode ...uaescapestring {\unexpanded {#1}}')}
l.12 }
? x
TeX interrupted. No pages of output.
Transcript written on MacroParameterCharacter.log.
So `#' is transformed into `##' when passed from TeX to Lua. Is this a
bug or a feature?
Jonathan
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