Current File : //usr/share/texlive/texmf-dist/tex/generic/ltxcmds/ltxcmds.sty

%%
%% This is file `ltxcmds.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% ltxcmds.dtx  (with options: `package')
%% 
%% This is a generated file.
%% 
%% Project: ltxcmds
%% Version: 2020-05-10 v1.25
%% 
%% Copyright (C)
%%    2009-2011 Heiko Oberdiek
%%    2016-2020 Oberdiek Package Support Group
%% 
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3c of this license or (at your option) any later
%% version. This version of this license is in
%%    https://www.latex-project.org/lppl/lppl-1-3c.txt
%% and the latest version of this license is in
%%    https://www.latex-project.org/lppl.txt
%% and version 1.3 or later is part of all distributions of
%% LaTeX version 2005/12/01 or later.
%% 
%% This work has the LPPL maintenance status "maintained".
%% 
%% The Current Maintainers of this work are
%% Heiko Oberdiek and the Oberdiek Package Support Group
%% https://github.com/ho-tex/ltxcmds/issues
%% 
%% The Base Interpreter refers to any `TeX-Format',
%% because some files are installed in TDS:tex/generic//.
%% 
%% This work consists of the main source file ltxcmds.dtx
%% and the derived files
%%    ltxcmds.sty, ltxcmds.pdf, ltxcmds.ins, ltxcmds.drv,
%%    ltxcmds-test1.tex, ltxcmds-test-gobble.tex,
%%    ltxcmds-test-ifempty.tex, ltxcmds-test-zapspace.tex,
%%    ltxcmds-test-ifboxempty.tex, ltxcmds-test-nextchar.tex,
%%    ltxcmds-test-carcdr.tex.
%% 
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode35=6 % #
  \catcode39=12 % '
  \catcode44=12 % ,
  \catcode45=12 % -
  \catcode46=12 % .
  \catcode58=12 % :
  \catcode64=11 % @
  \catcode123=1 % {
  \catcode125=2 % }
  \expandafter\let\expandafter\x\csname ver@ltxcmds.sty\endcsname
  \ifx\x\relax % plain-TeX, first loading
  \else
    \def\empty{}%
    \ifx\x\empty % LaTeX, first loading,
      % variable is initialized, but \ProvidesPackage not yet seen
    \else
      \expandafter\ifx\csname PackageInfo\endcsname\relax
        \def\x#1#2{%
          \immediate\write-1{Package #1 Info: #2.}%
        }%
      \else
        \def\x#1#2{\PackageInfo{#1}{#2, stopped}}%
      \fi
      \x{ltxcmds}{The package is already loaded}%
      \aftergroup\endinput
    \fi
  \fi
\endgroup%
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode35=6 % #
  \catcode39=12 % '
  \catcode40=12 % (
  \catcode41=12 % )
  \catcode44=12 % ,
  \catcode45=12 % -
  \catcode46=12 % .
  \catcode47=12 % /
  \catcode58=12 % :
  \catcode64=11 % @
  \catcode91=12 % [
  \catcode93=12 % ]
  \catcode123=1 % {
  \catcode125=2 % }
  \expandafter\ifx\csname ProvidesPackage\endcsname\relax
    \def\x#1#2#3[#4]{\endgroup
      \immediate\write-1{Package: #3 #4}%
      \xdef#1{#4}%
    }%
  \else
    \def\x#1#2[#3]{\endgroup
      #2[{#3}]%
      \ifx#1\@undefined
        \xdef#1{#3}%
      \fi
      \ifx#1\relax
        \xdef#1{#3}%
      \fi
    }%
  \fi
\expandafter\x\csname ver@ltxcmds.sty\endcsname
\ProvidesPackage{ltxcmds}%
  [2020-05-10 v1.25 LaTeX kernel commands for general use (HO)]%
\begingroup\catcode61\catcode48\catcode32=10\relax%
  \catcode13=5 % ^^M
  \endlinechar=13 %
  \catcode123=1 % {
  \catcode125=2 % }
  \catcode64=11 % @
  \def\x{\endgroup
    \expandafter\edef\csname LTXcmds@AtEnd\endcsname{%
      \endlinechar=\the\endlinechar\relax
      \catcode13=\the\catcode13\relax
      \catcode32=\the\catcode32\relax
      \catcode35=\the\catcode35\relax
      \catcode61=\the\catcode61\relax
      \catcode64=\the\catcode64\relax
      \catcode123=\the\catcode123\relax
      \catcode125=\the\catcode125\relax
    }%
  }%
\x\catcode61\catcode48\catcode32=10\relax%
\catcode13=5 % ^^M
\endlinechar=13 %
\catcode35=6 % #
\catcode64=11 % @
\catcode123=1 % {
\catcode125=2 % }
\def\TMP@EnsureCode#1#2{%
  \edef\LTXcmds@AtEnd{%
    \LTXcmds@AtEnd
    \catcode#1=\the\catcode#1\relax
  }%
  \catcode#1=#2\relax
}
\TMP@EnsureCode{36}{3}% $
\TMP@EnsureCode{38}{4}% &
\TMP@EnsureCode{40}{12}% (
\TMP@EnsureCode{41}{12}% )
\TMP@EnsureCode{45}{12}% -
\TMP@EnsureCode{46}{12}% .
\TMP@EnsureCode{47}{12}% /
\TMP@EnsureCode{60}{12}% <
\TMP@EnsureCode{62}{12}% >
\TMP@EnsureCode{91}{12}% [
\TMP@EnsureCode{96}{12}% `
\TMP@EnsureCode{93}{12}% ]
\TMP@EnsureCode{94}{12}% ^ (superscript) (!)
\TMP@EnsureCode{124}{12}% |
\edef\LTXcmds@AtEnd{\LTXcmds@AtEnd\noexpand\endinput}
\chardef\ltx@zero=0 %
\chardef\ltx@one=1 %
\chardef\ltx@two=2 %
\chardef\ltx@active=13 %
\chardef\ltx@cclv=255 %
\def\ltx@minusone{%
  -\ltx@one
}
\toksdef\ltx@LocToksA=0 %
\toksdef\ltx@LocToksB=2 %
\toksdef\ltx@LocToksC=4 %
\toksdef\ltx@LocToksD=6 %
\toksdef\ltx@LocToksE=8 %
\toksdef\ltx@GlobToksA=1 %
\toksdef\ltx@GlobToksB=3 %
\toksdef\ltx@GlobToksC=5 %
\toksdef\ltx@GlobToksD=7 %
\toksdef\ltx@GlobToksE=9 %
\dimendef\ltx@LocDimenA=0 %
\dimendef\ltx@LocDimenB=2 %
\dimendef\ltx@LocDimenC=4 %
\dimendef\ltx@LocDimenD=6 %
\dimendef\ltx@LocDimenE=8 %
\dimendef\ltx@GlobDimenA=1 %
\dimendef\ltx@GlobDimenB=3 %
\dimendef\ltx@GlobDimenC=5 %
\dimendef\ltx@GlobDimenD=7 %
\dimendef\ltx@GlobDimenE=9 %
\skipdef\ltx@LocSkipA=0 %
\skipdef\ltx@LocSkipB=2 %
\skipdef\ltx@LocSkipC=4 %
\skipdef\ltx@LocSkipD=6 %
\skipdef\ltx@LocSkipE=8 %
\skipdef\ltx@GlobSkipA=1 %
\skipdef\ltx@GlobSkipB=3 %
\skipdef\ltx@GlobSkipC=5 %
\skipdef\ltx@GlobSkipD=7 %
\skipdef\ltx@GlobSkipE=9 %
\long\def\ltx@gobble#1{}
\long\def\ltx@gobbletwo#1#2{}
\long\def\ltx@gobblethree#1#2#3{}
\long\def\ltx@gobblefour#1#2#3#4{}
\def\ltx@GobbleNum#1{%
  \romannumeral
  \csname ltx@zero%
  \expandafter\LTXcmds@GobbleNum
  \romannumeral\LTXcmds@num{#1}000{m\endcsname}%
}
\def\LTXcmds@GobbleNum#1{%
  \csname LTXcmds@G#1\LTXcmds@GobbleNum
}
\long\def\LTXcmds@Gm#1{%
  \endcsname
}
\long\def\ltx@firstofone#1{#1}
\long\def\ltx@firstoftwo#1#2{#1}
\long\def\ltx@secondoftwo#1#2{#2}
\long\def\ltx@firstofthree#1#2#3{#1}
\long\def\ltx@secondofthree#1#2#3{#2}
\long\def\ltx@thirdofthree#1#2#3{#3}%
\long\def\ltx@firstoffour#1#2#3#4{#1}
\long\def\ltx@secondoffour#1#2#3#4{#2}
\long\def\ltx@thirdoffour#1#2#3#4{#3}%
\long\def\ltx@fourthoffour#1#2#3#4{#4}%
\long\def\ltx@carzero#1\@nil{}%
\long\def\LTXcmds@cdrzero#1\@nil{#1}
\def\ltx@cdrzero{%
  \romannumeral\LTXcmds@cdrzero\ltx@zero
}
\long\def\ltx@car#1#2\@nil{#1}
\long\def\ltx@cdr#1{%
  \romannumeral\LTXcmds@cdrzero\ltx@zero
}
\long\def\ltx@cartwo#1#2#3\@nil{#1#2}
\long\def\ltx@carsecond#1#2#3\@nil{#2}
\long\def\ltx@cdrtwo#1#2{%
  \romannumeral\LTXcmds@cdrzero\ltx@zero
}
\long\def\ltx@carthree#1#2#3#4\@nil{#1#2#3}
\long\def\ltx@carthird#1#2#3#4\@nil{#3}
\long\def\ltx@cdrthree#1#2#3{%
  \romannumeral\LTXcmds@cdrzero\ltx@zero
}
\long\def\ltx@carfour#1#2#3#4#5\@nil{#1#2#3#4}
\long\def\ltx@carfourth#1#2#3#4#5\@nil{#4}
\long\def\ltx@cdrfour#1#2#3#4{%
  \romannumeral\LTXcmds@cdrzero\ltx@zero
}
\def\ltx@CarNum#1{%
  \romannumeral
  \csname LTXcmds@CarNumFinish%
  \expandafter\LTXcmds@CarNum
  \romannumeral\LTXcmds@num{#1}000{x\endcsname}%
}
\def\LTXcmds@CarNum#1{%
  \csname LTXcmds@C#1\LTXcmds@CarNum
}
\long\def\LTXcmds@Cm#1#2{%
  \endcsname{#1#2}%
}
\def\LTXcmds@Cx#1{%
  \endcsname{}%
}
\long\def\LTXcmds@CarNumFinish#1#2\@nil{%
  \ltx@zero
  #1%
}
\def\ltx@CarNumth#1{%
  \romannumeral
  \expandafter\expandafter\expandafter
  \LTXcmds@CarNumth
  \ltx@GobbleNum{#1}{}%
}
\long\def\LTXcmds@CarNumth#1#2\@nil{%
  \ltx@zero
  #1%
}
\def\ltx@CdrNum#1{%
  \romannumeral%
  \expandafter\expandafter\expandafter\ltx@cdrzero
  \expandafter\expandafter\expandafter\ltx@zero
  \ltx@GobbleNum{#1}%
}
\long\def\ltx@ReturnAfterFi#1\fi{\fi#1}
\long\def\ltx@ReturnAfterElseFi#1\else#2\fi{\fi#1}
\def\ltx@empty{}
\def\ltx@space{ }
\begingroup
  \lccode`0=`\%\relax
\lowercase{\endgroup
  \def\ltx@percentchar{0}%
}
\begingroup
  \lccode`0=`\\\relax
\lowercase{\endgroup
  \def\ltx@backslashchar{0}%
}
\begingroup
  \lccode`0=`\#\relax
\lowercase{\endgroup
  \def\ltx@hashchar{0}%
}
\begingroup
  \lccode`0=`\{\relax
\lowercase{\endgroup
  \def\ltx@leftbracechar{0}%
}
\begingroup
  \lccode`0=`\}\relax
\lowercase{\endgroup
  \def\ltx@rightbracechar{0}%
}
\def\ltx@newif#1{%
  \begingroup
    \escapechar=-1 %
  \expandafter\endgroup
  \expandafter\LTXcmds@newif\string#1\@nil
}
\begingroup
  \escapechar=-1 %
\expandafter\endgroup
\expandafter\def\expandafter\LTXcmds@newif\string\if#1\@nil{%
  \expandafter\edef\csname#1true\endcsname{%
    \let
    \expandafter\noexpand\csname if#1\endcsname
    \noexpand\iftrue
  }%
  \expandafter\edef\csname#1false\endcsname{%
    \let
    \expandafter\noexpand\csname if#1\endcsname
    \noexpand\iffalse
  }%
  \csname#1false\endcsname
}
\def\ltx@newglobalif#1{%
  \begingroup
    \escapechar=-1 %
  \expandafter\endgroup
  \expandafter\LTXcmds@newglobalif\string#1\@nil
}
\begingroup
  \escapechar=-1 %
\expandafter\endgroup
\expandafter
\def\expandafter\LTXcmds@newglobalif\string\if#1\@nil{%
  \expandafter\edef\csname#1true\endcsname{%
    \global\let
    \expandafter\noexpand\csname if#1\endcsname
    \noexpand\iftrue
  }%
  \expandafter\edef\csname#1false\endcsname{%
    \global\let
    \expandafter\noexpand\csname if#1\endcsname
    \noexpand\iffalse
  }%
  \csname#1false\endcsname
}
\def\ltx@LocalExpandAfter{%
  \begingroup
    \expandafter\expandafter\expandafter
  \endgroup
  \expandafter
}
\ltx@LocalExpandAfter
\ifx\csname ifcsname\endcsname\relax
  \def\ltx@ifundefined#1{%
    \expandafter\ifx\csname #1\endcsname\relax
      \expandafter\ltx@firstoftwo
    \else
      \expandafter\ltx@secondoftwo
    \fi
  }%
  \def\ltx@IfUndefined#1{%
    \begingroup\expandafter\expandafter\expandafter\endgroup
    \expandafter\ifx\csname #1\endcsname\relax
      \expandafter\ltx@firstoftwo
    \else
      \expandafter\ltx@secondoftwo
    \fi
  }%
  \expandafter\ltx@gobble
\else
  \expandafter\ltx@firstofone
\fi
{%
  \def\ltx@ifundefined#1{%
    \ifcsname #1\endcsname
      \expandafter\ifx\csname #1\endcsname\relax
        \expandafter\expandafter\expandafter\ltx@firstoftwo
      \else
        \expandafter\expandafter\expandafter\ltx@secondoftwo
      \fi
    \else
      \expandafter\ltx@firstoftwo
    \fi
  }%
  \let\ltx@IfUndefined\ltx@ifundefined
}
\def\ltx@RemovePrefix#1>{}
\def\ltx@StripPrefix{%
  \expandafter\ltx@RemovePrefix
}
\def\ltx@onelevel@sanitize#1{%
  \edef#1{%
    \expandafter
    \ltx@RemovePrefix\meaning#1%
  }%
}
\def\ltx@clsextension{cls}
\def\ltx@pkgextension{sty}
\def\ltx@iffileloaded#1{%
  \ltx@ifundefined{ver@#1}\ltx@secondoftwo\ltx@firstoftwo
}
\def\ltx@ifclassloaded#1{%
  \ltx@iffileloaded{#1.\ltx@clsextension}%
}
\def\ltx@ifpackageloaded#1{%
  \ltx@iffileloaded{#1.\ltx@pkgextension}%
}
\def\ltx@ifl@ter#1#2{%
  \expandafter\ltx@ifl@t@r
    \csname ver@#2.#1\endcsname}
\def\ltx@ifl@t@r#1#2{%
  \ifnum\expandafter\ltx@parse@version@#1//00\@nil<%
        \expandafter\ltx@parse@version@#2//00\@nil
    \expandafter\@secondoftwo
  \else
    \expandafter\@firstoftwo
  \fi}
\def\ltx@parse@version@#1{\ltx@parse@version0#1}
\def\ltx@parse@version#1/#2/#3#4#5\@nil{%
\ltx@parse@version@dash#1-#2-#3#4\@nil
}
\def\ltx@parse@version@dash#1-#2-#3#4#5\@nil{%
  \if\relax#2\relax\else#1\fi#2#3#4 }
\def\ltx@iffilelater#1{\expandafter\ltx@ifl@t@r\csname ver@#1\endcsname}
\def\ltx@ifclasslater{\ltx@ifl@ter\ltx@clsextension}
\def\ltx@ifpackagelater{\ltx@ifl@ter\ltx@pkgextension}
\long\def\ltx@GlobalAppendToMacro#1#2{%
  \ifx\ltx@undefined#1%
    \let#1\ltx@empty
  \else
    \ifx\relax#1%
      \let#1\ltx@empty
    \fi
  \fi
  \begingroup
    \ltx@LocToksA\expandafter{#1#2}%
    \xdef#1{\the\ltx@LocToksA}%
  \endgroup
}
\long\def\ltx@LocalAppendToMacro#1#2{%
  \global\let\LTXcmds@gtemp#1%
  \ifx\ltx@undefined\LTXcmds@gtemp
    \global\let\LTXcmds@gtemp\ltx@empty
  \else
    \ifx\relax\LTXcmds@gtemp
      \global\letLTXcmds@gtemp\ltx@empty
    \fi
  \fi
  \begingroup
    \ltx@LocToksA\expandafter{\LTXcmds@gtemp#2}%
    \xdef\LTXcmds@gtemp{\the\ltx@LocToksA}%
  \endgroup
  \let#1\LTXcmds@gtemp
}
\long\def\ltx@GlobalPrependToMacro#1#2{%
  \ifx\ltx@undefined#1%
    \let#1\ltx@empty
  \else
    \ifx\relax#1%
      \let#1\ltx@empty
    \fi
  \fi
  \begingroup
    \ltx@LocToksA{#2}%
    \ltx@LocToksB\expandafter{#1}%
    \xdef#1{\the\ltx@LocToksA\the\ltx@LocToksB}%
  \endgroup
}
\long\def\ltx@LocalPrependToMacro#1#2{%
  \global\let\LTXcmds@gtemp#1%
  \ifx\ltx@undefined\LTXcmds@gtemp
    \global\let\LTXcmds@gtemp\ltx@empty
  \else
    \ifx\relax\LTXcmds@gtemp
      \global\letLTXcmds@gtemp\ltx@empty
    \fi
  \fi
  \begingroup
    \ltx@LocToksA{#2}%
    \ltx@LocToksB\expandafter{\LTXcmds@gtemp}%
    \xdef\LTXcmds@gtemp{\the\ltx@LocToksA\the\ltx@LocToksB}%
  \endgroup
  \let#1\LTXcmds@gtemp
}
\long\def\ltx@ifnextchar#1#2#3{%
  \begingroup
  \let\LTXcmds@CharToken= #1\relax
  \ltx@LocToksA{\endgroup#2}%
  \ltx@LocToksB{\endgroup#3}%
  \futurelet\LTXcmds@LetToken\LTXcmds@ifnextchar
}
\def\LTXcmds@ifnextchar{%
  \ifx\LTXcmds@LetToken\LTXcmds@CharToken
    \the\expandafter\ltx@LocToksA
  \else
    \expandafter
      \ifx\csname LTXcmds@LetToken\endcsname\LTXcmds@SpaceToken
      \expandafter\expandafter\expandafter\LTXcmds@@ifnextchar
    \else
      \the\expandafter\expandafter\expandafter\ltx@LocToksB
    \fi
  \fi
}
\def\LTXcmds@@ifnextchar{%
  \expandafter\futurelet
  \expandafter\LTXcmds@LetToken
  \expandafter\LTXcmds@ifnextchar
  \romannumeral-`\.%
}
\ltx@firstofone{\let\LTXcmds@SpaceToken= } %
\long\def\ltx@ifnextchar@nospace#1#2#3{%
  \begingroup
  \let\LTXcmds@CharToken= #1\relax
  \ltx@LocToksA{\endgroup#2}%
  \ltx@LocToksB{\endgroup#3}%
  \futurelet\LTXcmds@LetToken\LTXcmds@ifnextchar@nospace
}
\def\LTXcmds@ifnextchar@nospace{%
  \the
  \ifx\LTXcmds@LetToken\LTXcmds@CharToken
    \expandafter\ltx@LocToksA
  \else
    \expandafter\ltx@LocToksB
  \fi
}
\ltx@IfUndefined{quitvmode}{%
  \ltx@IfUndefined{leavevmode}{%
    \ltx@IfUndefined{voidb@x}{%
      \ltx@IfUndefined{newbox}{%
        \def\ltx@leavevmode{%
          \begingroup
            \setbox\ltx@zero=\hbox{}%
            \begingroup
              \setbox\ltx@zero=\hbox{\box\ltx@zero}%
            \endgroup
            \unhbox\ltx@zero
          \endgroup
        }%
      }{%
        \csname newbox\endcsname\LTXcmds@VoidBox
        \ifvoid\LTXcmds@VoidBox
        \else
          \setbox\LTXcmds@VoidBox=\hbox{}%
          \begingroup
            \setbox\LTXcmds@VoidBox=\hbox{\box\LTXcmds@VoidBox}%
          \endgroup
        \fi
        \def\ltx@leavevmode{\unhbox\LTXcmds@VoidBox}%
      }%
    }{%
      \def\ltx@leavevmode{\unhbox\voidb@x}%
    }%
  }{%
    \let\ltx@leavevmode\leavevmode
  }%
}{%
  \let\ltx@leavevmode\quitvmode
}
\def\ltx@mbox{%
  \ltx@leavevmode
  \hbox
}
\ltx@IfUndefined{numexpr}{%
  \def\LTXcmds@num#1{%
    \expandafter\ltx@firstofone\expandafter{%
      \number#1%
    }%
  }%
}{%
  \def\LTXcmds@num#1{%
    \expandafter\ltx@firstofone\expandafter{%
      \the\numexpr#1%
    }%
  }%
}
\ltx@IfUndefined{detokenize}{%
  \def\LTXcmds@temp#1{%
    \long\def\ltx@ifempty##1{%
      \romannumeral0%
      \iffalse{\fi
        \expandafter\ltx@gobble\expandafter{%
          \expandafter{\string##1}%
          \expandafter\ltx@gobble\string
        }%
        \expandafter\ltx@firstofthree\expandafter
        {\iffalse}\fi
        \expandafter#1\ltx@secondoftwo
      }%
      \expandafter#1\ltx@firstoftwo
    }%
    \long\def\ltx@ifblank##1{%
      \romannumeral0%
      \iffalse{\fi
        \expandafter\expandafter\expandafter\ltx@gobble
        \expandafter\expandafter\expandafter{%
          \expandafter\expandafter\expandafter{%
            \expandafter\string\ltx@gobble##1.%
          }%
          \expandafter\ltx@gobble\string
        }%
        \expandafter\ltx@firstofthree\expandafter
        {\iffalse}\fi
        \expandafter#1\ltx@secondoftwo
      }%
      \expandafter#1\ltx@firstoftwo
    }%
  }%
  \LTXcmds@temp{ }%
}{%
  \long\def\ltx@ifempty#1{%
    \romannumeral%
    \csname
      LTXcmds@ifempty%
      \ifcat$\detokenize{#1}$%
        @%
      \fi
    \endcsname
  }%
  \long\def\LTXcmds@ifempty@#1#2{0 #1}%
  \long\def\LTXcmds@ifempty#1#2{0 #2}%
  \long\def\ltx@ifblank#1{%
    \romannumeral%
    \csname
      LTXcmds@ifempty%
      \ifcat$\detokenize\expandafter{\ltx@gobble#1.}$%
        @%
      \fi
    \endcsname
  }%
}
\long\def\ltx@zapspace#1{%
  \romannumeral
  \LTXcmds@zapspace\ltx@zero#1 \@nil
}
\long\def\LTXcmds@zapspace#1 #2\@nil{%
  \ltx@ifempty{#2}{%
    #1%
  }{%
    \LTXcmds@zapspace#1#2\@nil
  }%
}
\ltx@IfUndefined{lastnodetype}{%
  \catcode`\$=9 %
  \catcode`\&=14 %
}{%
  \catcode`\$=14 %
  \catcode`\&=9 %
}
\def\ltx@IfBoxEmpty#1{%
  \ifvoid#1\relax
    \expandafter\ltx@secondoftwo
  \else
&   \begingroup
&     \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{%
&       \ifhmode\unhcopy\else\unvcopy\fi#1\relax
&       \expandafter
&     }%
&   \expandafter\endgroup
&   \ifnum\lastnodetype<\ltx@zero
&     \expandafter\expandafter\expandafter\ltx@firstoftwo
&   \else
&     \expandafter\expandafter\expandafter\ltx@secondoftwo
&   \fi
$   \begingroup
$     \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{%
$       \penalty\ltx@one
$       \ifhmode\unhcopy\else\unvcopy\fi#1\relax
$       \expandafter
$     }%
$     \ifnum\lastpenalty=\ltx@one
$       \endgroup
$       \begingroup
$       \setbox\ltx@zero=\ifhbox#1\hbox\else\vbox\fi{%
$         \penalty\ltx@two
$         \ifhmode\unhcopy\else\unvcopy\fi#1\relax
$         \expandafter
$       }%
$       \ifnum\lastpenalty=\ltx@two
$         \def\next{\endgroup\expandafter\ltx@firstoftwo}%
$       \else
$         \def\next{\endgroup\expandafter\ltx@secondoftwo}%
$       \fi
$     \else
$       \def\next{\endgroup\expandafter\ltx@secondoftwo}%
$     \fi
$   \next
  \fi
}
\def\ltx@IfBoxVoidOrEmpty#1{%
  \ifvoid#1\relax
    \expandafter\ltx@thirdoffour
  \fi
  \ltx@IfBoxEmpty{#1}%
}
\LTXcmds@AtEnd%
%% \section{Installation}
\endinput
%%
%% End of file `ltxcmds.sty'.