On 1/2/2022 2:14 PM, Benjamin Buchmuller wrote:
Thanks, Hans, for the answer, but I'm not sure if I get the point.
While this is possible in ConTeXt:
\startsection[title={My Title}]
\beginMyBlock
bla bla
\endMyBlock
\stopsection
The following won't work (end of file error):
\startMyCommand[optional={Maybe}]
\beginMyBlock
bla bla
\endMyBlock
\stopMyCommand
I had hoped for a simple command/modifier like
\pleaseacceptblocks\def\startMyCommand[#1]#2\stopMyCommand to have #2 work in
a similar way.
But maybe, as Wolfgang stated here
(https://www.mail-archive.com/ntg-context@ntg.nl/msg73956.html), buffers and
blocks can't be used in commands. (To add: Even when passed as arguments during
compilation?)
You can bet that WS is right.
You really have to go dirty tex for this kind of magic:
\defineblock[MyBlock]
\keepblocks[MyBlock]
\starttext
\tolerant\def\startMyCommand[#1]%
{\begingroup
\setcatcodetable\notcatcodes
\dostartMyCommand[#1]}
\let\stopMyCommand\relax
\normalexpanded{\def\noexpand\dostartMyCommand[#1]#2\expandtoken\notcatcodes92
stopMyCommand}%
{\endgroup
% whatever #1 does
\setbuffer[foo]#2\endbuffer
\typebuffer[foo]
\getbuffer[foo]}
or
\normalexpanded{\def\noexpand\dostartMyCommand[#1]#2\retokenized\notcatcodes
{\stopMyCommand}}%
{\endgroup
% whatever #1 does
\setbuffer[foo]#2\endbuffer
\typebuffer[foo]
\getbuffer[foo]}
\startMyCommand[optional={Maybe}]
\beginMyBlock
bla bla
\endMyBlock
\stopMyCommand
\stoptext
and then of course further nesting mess ...
Hans
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Hans Hagen | PRAGMA ADE
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