% \iffalse meta-comment
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% Copyright (C) 2019-2020
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It 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.
% The latest version of this license is in
%    https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
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% \iffalse
%%% From File: ltexpl.dtx
%
%<*driver>
% \fi
\ProvidesFile{ltexpl.dtx}
             [2020-03-05 v1.1 LaTeX Kernel (expl3-dependent code)]
% \iffalse
\documentclass{ltxdoc}
\GetFileInfo{ltfinal.dtx}
\title{\filename}
\date{\filedate}
\author{%
  Joseph Wright}
\begin{document}
 \MaintainedByLaTeXTeam{latex}
 \maketitle
 \DocInput{ltfinal.dtx}
\end{document}
%</driver>
% \fi
%
% \section{\pkg{expl3}-dependent code}
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% \StopEventually{}
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% \changes{v0.0}{2019-10-02}{Initial version}
%
%    \begin{macrocode}
%<*2ekernel>
%    \end{macrocode}
%
% \subsection{Loader}
%
%  Check for the required primitive/engine support and the existence of
%  a loader.
%    \begin{macrocode}
%</2ekernel>
%<*2ekernel|latexrelease>
%<latexrelease>\IncludeInRelease{2020/02/02}%
%<latexrelease>                 {expl3}{Pre-load expl3}%
%    \end{macrocode}
%    If we are doing a rollback with a format containing expl3 we
%    aren't reloading it as that creates havoc. This may need a
%    refined version!
% \changes{v1.0a}{2020/03/02}
%         {Don't load expl3 if already in the format (gh/295)}
% \changes{v1.1}{2020/03/05}
%         {Load xparse.ltx if \cs{NewDocumentCommand} is not defined by expl3.ltx}
%    \begin{macrocode}
\expandafter\ifx\csname tex\string _let:D\endcsname\relax
  \IfFileExists{expl3.ltx}
    {%
      \ifnum0%
        \ifdefined\pdffilesize 1\fi
        \ifdefined\filesize 1\fi
        \ifdefined\luatexversion\ifnum\luatexversion>94 1\fi\fi
        >0 %
        \expandafter\@firstofone
      \else
        \message{Skipping expl3-dependent extensions}
%<2ekernel>      \expandafter\endinput
%<latexrelease>      \expandafter\@gobble
      \fi
    }
    {%
      \message{Skipping expl3-dependent extensions}%
%<2ekernel>    \endinput
%<latexrelease>    \@gobble
    }%
    {%
      \input{expl3.ltx}
      \ifdefined\NewDocumentCommand
      \else
        \IfFileExists{xparse.ltx}
          {\input{xparse.ltx}}
          {}%
       \fi
    }%
\else
  \GenericInfo{}{Skipping: expl3 code already part of the format}
\fi
%</2ekernel|latexrelease>
%<latexrelease>\EndIncludeInRelease
%<*2ekernel>
%    \end{macrocode}
%
%    \begin{macrocode}
%</2ekernel>
%    \end{macrocode}
%
% \Finale
