um-code-base.dtx

%%^^A%% um-code-base.dtx -- part of UNICODE-MATH <wspr.io/unicode-math>
%%^^A%% Definition of unicode-math.sty, which splits and loads according to engine.

% \section{The \texttt{unicode-math.sty} loading file}
%
% The \texttt{unicode-math.sty} file is a stub which loads necessary packages
% and then bifurcates into a XeTeX- or LuaTeX-specific version of the package.
%
%    \begin{macrocode}
%<*base>
%    \end{macrocode}
% Bail early if necessary.
%    \begin{macrocode}
\ifdefined\XeTeXversion
  \ifdim\number\XeTeXversion\XeTeXrevision in<0.9998in%
    \PackageError{unicode-math}{%
      Cannot run with this version of XeTeX!\MessageBreak
      You need XeTeX 0.9998 or newer.%
    }\@ehd
  \fi
\else\ifdefined\luatexversion
  \ifnum\luatexversion<64%
    \PackageError{unicode-math}{%
      Cannot run with this version of LuaTeX!\MessageBreak
      You need LuaTeX 0.64 or newer.%
    }\@ehd
  \fi
\else
  \PackageError{unicode-math}{%
    Cannot be run with pdfLaTeX!\MessageBreak
    Use XeLaTeX or LuaLaTeX instead.%
  }\@ehd
\fi\fi
%    \end{macrocode}
%
% \paragraph{Packages}
% Assuming people are running up-to-date packages.
%    \begin{macrocode}
\RequirePackage{expl3,xparse,l3keys2e}
\RequirePackage{fontspec}
\RequirePackage{filehook}
\RequirePackage{fix-cm}
%<debug>\RequirePackage{l3benchmark}
%    \end{macrocode}
%
% \paragraph{Bifurcate}
%    \begin{macrocode}
\ExplSyntaxOn
\sys_if_engine_luatex:T { \RequirePackageWithOptions{unicode-math-luatex} }
\sys_if_engine_xetex:T  { \RequirePackageWithOptions{unicode-math-xetex}  }
\ExplSyntaxOff
%    \end{macrocode}
%
%    \begin{macrocode}
%</base>
%    \end{macrocode}

\endinput

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% The UNICODE-MATH package  <wspr.io/unicode-math>
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