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%% This is part of OpTeX project, see http://petr.olsak.net/optex
\_codedecl \sdef {Basic macros for OpTeX <2019-05-21>}
\let\_bgroup={ \let\_egroup=}
\_bgroup \_lccode`\.=`\\ \_lowercase{\_egroup \_def\_nbackslash {.}}
\_edef \_nbb {\_nbackslash\_nbackslash}
\_edef \_pcent{\_xstring\%}
\_def \_empty {}
\_def \_space { }
\_def \_null {\_hbox{}}
\_def \_wlog {\_immediate\_write-1 } % write on log file (only)
\_def \_wterm {\_immediate\_write16 }
\_def \_opwarning #1{\_wterm{WARNING: #1.}}
\_def \_sdef #1{\_ea\_def \_csname#1\_endcsname}
\_def \_sxdef #1{\_ea\_xdef \_csname#1\_endcsname}
\_def \_slet #1#2{\_ea\_let \_csname#1\_ea\_endcsname \_csname#2\_endcsname}
\_def \_adef #1{\_catcode`#1=13 \_begingroup \_lccode`\~=`#1\_lowercase{\_endgroup\_def~}}
\_def \_cs #1{\_csname#1\_endcsname}
\_long\_def \_addto #1#2{\_ea\_def\_ea#1\_ea{#1#2}}
\_ea\_def \_ea\_meaningsepare \_ea#\_ea1\_string m#2:#3->#4^{{#1}{#3}{#4}}
\_bgroup \_catcode`!=3 \_catcode`?=3
\_gdef\_replstring #1#2#3{% \replstring #1{stringA}{stringB}
\_long\_def\_replacestringsA##1#2{\_def #1{##1}\_replacestringsB}%
\_long\_def\_replacestringsB##1#2{\_ifx!##1\_relax \_else \_addto #1{#3##1}%
\_ea\_replacestringsB\_fi}%
\_ea\_replacestringsA #1?#2!#2%
\_long\_def\_replacestringsA##1?{\_def #1{##1}}\_ea\_replacestringsA #1}
\_egroup
\_def\_loggingall{\_tracingcommands=3 \tracingstats=2 \tracingassigns=1
\tracingpages=1 \tracingoutput=1 \tracinglostchars=1
\tracingmacros=2 \tracingparagraphs=1 \tracingrestores=1 }
\_def\_tracingall{\tracingonline=1 \loggingall}
\_def\_remfirstunderscore#1{\_ea\_remfirstunderscoreA#1\_relax#1}
\_def\_remfirstunderscoreA#1#2\_relax#3{\_if _#1\_def#3{#2}\_fi}
\_public
\bgroup \egroup \nbackslash \sdef \sxdef \slet \cs \adef
\addto \meaningsepare \wlog \wterm \opwarning
\empty \space \null \nbb \pcent \ncaret
\isinlist \replstring \remfirstunderscore \loggingall \tracingall ;
\_endcode % -------------------------------------
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