fontspec-code-load.dtx

%%^^A%%  fontspec-code-load.dtx -- part of FONTSPEC <latex3.github.io/fontspec>
%
% \section{The \texttt{fontspec.sty} loading file}
%
% Before we begin, for the rest of the package we use the \texttt{@@} \textsf{expl3}
% module syntax with module name `\texttt{fontspec}'.
%    \begin{macrocode}
%<@@=fontspec>
%    \end{macrocode}
% The \texttt{fontspec.sty} file is simply set up to load the appropriate
% \texttt{fontspec-xetex.sty} or \texttt{fontspec-luatex.sty} file.
% This is performed by the following code.
%
%    \begin{macrocode}
%<*load>
%    \end{macrocode}
%
% \paragraph{\LuaLaTeX}
%    \begin{macrocode}
\sys_if_engine_luatex:T
  {
    \RequirePackage{luaotfload}
    \lua_now:e{require("fontspec")}
    \RequirePackage{fontspec-luatex}
    \endinput
  }
%    \end{macrocode}
%
% \paragraph{\XeLaTeX}
%    \begin{macrocode}
\sys_if_engine_xetex:T
  {
    \RequirePackage{fontspec-xetex}
    \endinput
  }
%    \end{macrocode}
%
% \paragraph{Other}
% If not one of the above, error and exit.
%    \begin{macrocode}
\msg_new:nnn {fontspec} {cannot-use-pdftex}
  {
    The~ fontspec~ package~ requires~ either~ XeTeX~ or~ LuaTeX.\\\\
    You~ must~ change~ your~ typesetting~ engine~ to,~ e.g.,~
    "xelatex"~ or~ "lualatex"~ instead~ of~ "latex"~ or~ "pdflatex".
  }
\msg_fatal:nn {fontspec} {cannot-use-pdftex}
%    \end{macrocode}
%
% \paragraph{Closing}
% That's the end of the \texttt{fontspec.sty} file.
%    \begin{macrocode}
\endinput
%</load>
%    \end{macrocode}

\endinput

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% The FONTSPEC package  <latex3.github.io/fontspec>
% ------------------------------------------------
% Copyright  2022-2024  The LaTeX project,  LPPL "maintainer"
% Copyright  2004-2022  Will Robertson
% Copyright  2009-2015  Khaled Hosny
% Copyright  2013       Philipp Gesang
% Copyright  2013-2016  Joseph Wright
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% This package is free software and may be redistributed and/or modified under
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% (your choice): <http://www.latex-project.org/lppl/>.
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