Re: [NTG-context] Treating underscore as a normal character

7 Feb 2007

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"Hans" == Hans Hagen  writes:
Hans> \defineactivecharacter _ {\mathortext{_}{\_}} text_text
    Hans> $a^2$

Hi Hans,

Thanks, but it is not sufficient. I finally narrowed it down to a
\placelist.

Here is a very short example:

- --------------------------------------------------
\def\MyHead#1#2%
  {\setupframed[frame=off]
   \framed[width=\hsize,offset=overlay]
     {\placesidebyside
        {\doifmodeelse{*sectionnumber}%
           {\framed[width=.6\hsize,offset=1em,strut=no,align=right,background=screen,backgroundscreen=0.4]
              {In this chapter: \blank
                    \placelist
                      [section]
                      [criterium=chapter,
                       style=boldslanted,
                       align=right,
                       interaction=all,
                       symbol=1,
                       width=1em,
                       pagenumber=no,
                       before=,
                       after=]}}%
           {\framed[width=.6\hsize]{}} % dummy
        }%
        {\framed
           [width=.4\hsize,offset=1em,strut=no,align=left]
           {{\bsd #1\par\leftskip=0pt plus1fil #2}}}}%
}

\setuphead
  [chapter]
  [command=\MyHead]

\defineactivecharacter _ {\mathortext{_}{\_}}

\starttext

\chapter{Short (flat) listing of Standard C classes}

\section{STDC_BASE}

\stoptext
- --------------------------------------------------

Result:

- --------------------------------------------------
(./test.tuo
! Missing $ inserted.
<inserted text> 
                $
<to be read again> 
                   _
<argument> STDC_
                BASE
\listtextcommand #1->\begstrut #1
                                 \endstrut 
\doattributes ...sname #1#2\@EA \endcsname \fi {#4
                                                  }\dostopattributes 
<argument> ...ont \limitatedlistentry {STDC_BASE}}
                                                  \egroup \ifdim \wd 4=\zero...
...
- --------------------------------------------------

I suppose you know the trick to fix this? If you look at test.tuo you
will see this line:

\listentry{section}{2}{1.1}{STDC_BASE}{2--0-1-1-0-0-0-0--1}{1}

That's the culprit, should have been written as STDC\_BASE I assume.

- -- 
All the best,

Berend de Boer

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