On Tue, 6 Feb 2007 10:36:42 -0500 (EST)
Aditya Mahajan <[EMAIL PROTECTED]> wrote:
> On Tue, 6 Feb 2007, Hans Hagen wrote:
>
> > Aditya Mahajan wrote:
> >>
> >>> Can someone suggest a better way to do this?
> >>>
> >>
> >> I found another way, I hope that it has no gotcha's
> >>
> > search for group(ed)(empty|argument) in cont-sys.tex
>
> Did you mean syst-gen.tex? I tied dodoublegroupempty but it did not
> work in one case (see previous post) and I can not figure out why.
>
> Aditya
Hi Aditya,
I tried something similiar and copied a example from core-rul.tex
The following macro use a method copied from textrule and the second
argument between the braces should be optional. I looked into the log
file created with tracingmacros and it seems TeX cannot find the
optional argument.
\long\def\startDEBITS#1\stopDEBITS
{\bgroup
\def\debit{\dosingleempty\dodebit}%
\def\dodebit[##1]%
{\def\dododebit####1{\dodododebit[##1]{####1}}%
\dosinglegroupempty\dododebit}%
\def\dodododebit[##1]##2%
{\hbox to\hsize{\strut##1\hfill##2}}%
\vbox{\hsize4cm\hrule#1\hrule}%
\egroup}
\starttext
%\tracingmacros1
\startDEBITS
\debit [Text] {100} ttt
\debit [Text] {200} xxx
\stopDEBITS
%\tracingmacros0
\stoptext
Hans, can you give us a hint what we are doing wrong or can you make a
simple example to show us how we can create optional arguments between
braces.
Wolfgang
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