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% This is macro package used by OpTeX, see http://petr.olsak.net/optex
\_codedecl \_undefined {Obscure @ names from plain TeX <2020-05-22>}
\_opwarning{plain-at.opm is obsolete, ignored. @-names defined in the format}
\_endcode
% Old version of plain-at.opm follows:
\_setctable \_optexcatcodes
% PlainTeX obscure names:
\_catcode`\@=11
\_let\z@=\_zo
\_let\z@skip=\_zoskip
\_newdimen\p@ \p@=1pt
\_chardef\@ne=1
\_chardef\tw@=2
\_chardef\thr@@=3
\_chardef\sixt@@n=16
\_mathchardef\@m=1000
\_mathchardef\@M=10000
\_mathchardef\@MM=20000
\_countdef\m@ne=22 \m@ne=-1
\_chardef\@cclv=255
\_mathchardef\@cclvi=256
\_skipdef\skip@=0
\_dimendef\dimen@=0
\_dimendef\dimen@i=1
\_dimendef\dimen@ii=2
\_countdef\count@=255
\_def\m@th{\_mathsurround\z@}
\_def\o@lign{\_lineskiplimit\z@ \_oalign}
\_def\n@space{\_nulldelimiterspace\z@ \m@th}
\_newdimen\p@renwd \p@renwd=8.75pt
\_def\alloc@#1#2#3#4#5{\_allocator#5{\_csstring#2}#3}
\_catcode`\@=12
\_restorectable
\_endcode
We absolutely don't recommend to use such obscure names in your macros. But
sometimes you need to read an old plain TeX document or a macro file. You
can load this file in such cases. For example:
\begtt
\load [plain-at, shapepar.sty]
\endtt
\_endinput
2022-02-15: marked obsolete
2020-12-20: released
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