From: Hans Hagen <j.hagen@xs4all.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: mp strings
Date: Fri, 10 Apr 2020 14:12:04 +0200 [thread overview]
Message-ID: <9f8d07f1-c0e7-f04f-008f-1f42ba0f9fe5@xs4all.nl> (raw)
Hi,
The *next* lmtx upload (one of these days) will have a small extension
to the mp library wrt strings. In order to be more " neutral the string
can be bound by STX/EOT characters (enabled by default). In addition to
that there is also an option to set the catcode regime. The combination
of these permits passing and processing strings as-they-are. Just in
case the Gerbens among us need it.
Hans
==================== example =====================
\startTEXpage
\def\foo{x}
\framed{\startMPcode
interim catcoderegime := vrbcatcoderegime ;
draw textext("stream $\string\foo$") withcolor "darkred" ;
\stopMPcode}
\framed{\startMPcode
draw textext("stream $\foo$") withcolor "darkblue" ;
\stopMPcode}
\startlmtxmode
% here the string starts with ascii code 2 (STX) and ends with
% ascii code 3 (EOT) ... visibility depends on the editor and
% font used; these are normally not used and therefore nice
% alternative string capsules
\framed{\startMPcode
interim catcoderegime := vrbcatcoderegime ;
draw textext(\x02stream $\string\foo$\x03) withcolor "darkgreen" ;
\stopMPcode}
\framed{\startMPcode
draw textext(\x02stream $\foo$\x03) withcolor "darkyellow" ;
\stopMPcode}
\stoplmtxmode
\stopTEXpage
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