Am 03.10.2010 um 11:02 schrieb Wolfgang Schuster:
> Am 03.10.2010 um 10:28 schrieb luigi scarso:
>
>> Limitation, but it should be doable to remedy in TeX.
>
> Possible but is it worth the effort, when you start with “--” the percent
> should also behave like in Lua etc.
The problem is that there is no solution to write something expandable (because
\startluacode expands the content) which is required here.
> \starttext
>
> \bgroup\obeylines
> \gdef\texcomment#1
> {}
> \egroup
>
> \bgroup
> \let\letterhyphen=-
> \catcode`-=13
> \unexpanded\def-{\futurelet\next\doscanhyphen}
> \def\doscanhyphen
> {\ifx\next-
> \expandafter\texcomment
> \else
> \expandafter\letterhyphen
> \fi}
> \obeylines
> text
> text
> % foo
> - foo 1
-- \undefined
\normalexpanded{- foo 1}
\normalexpanded{-- foo 2}
\normalexpanded{-- \undefined}
> text
> \egroup
>
> \stoptext
Wolfgang
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