Re: [mkvi] comment handling bug

[Philipp Gesang <gesang@stud.uni-heidelberg.de>]

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On 2012-05-14 09:35, Hans Hagen wrote:
> On 13-5-2012 13:12, Philipp Gesang wrote:
> >Hi all,
> >
> >seems the mkvi-style macros have trouble with groups in comments:
> >
> >········································································
> >% macros=mkvi
> >\def\dosomething#content{%%%<= fine with “#1”
> >   % { %%% Open unbalanced brace breaks macros.
> >}
> >
> >\starttext \dosomething {foo} \stoptext
> >········································································
> >
> >Fails here with:
> >
> >   <to be read again>
> >                     c
> >   l.2 \def\dosomething#c
> >                         ontent{%%%<= fine with “#1”
> >
> >Removing the comment, closing the group or reverting to TEX-style
> >argument numbering makes this behavior disappear.
> 
> Indeed there are some limitations to the parser. I'll note it down
> as low priority issue.

Would it be possible to modify the comment pattern so that it
accept initial spaces? At least it fixes my problem.

Philipp

--- /home/laokoon/base/luat-mac.lua 2012-05-14 14:52:40.674091445 +0200
+++ luat-mac.lua    2012-05-14 15:18:35.968999022 +0200
@@ -110,8 +110,10 @@
 
 local commenttoken   = P("%")
 local crorlf         = S("\n\r")
-local commentline    = commenttoken * ((Carg(1) * C((1-crorlf)^0))/function(strip,s) return strip and "" or s end)
-local commentline    = commenttoken * ((1-crorlf)^0)
+--local commentline    = commenttoken * ((Carg(1) * C((1-crorlf)^0))/function(strip,s) return strip and "" or s end)
+--local commentline    = commenttoken * ((1-crorlf)^0)
+local commentstart   = space^0 * commenttoken
+local commentline    = commentstart * ((1-crorlf)^0)
 local leadingcomment = (commentline * crorlf^1)^1
 local furthercomment = (crorlf^1 * commentline)^1

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