Current File : //usr/share/texlive/texmf-dist/tex/latex/fontspec/fontspec.sty

%%
%% This is file `fontspec.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% fontspec.dtx  (with options: `fontspec,load')
%% fontspec-code-load.dtx  (with options: `fontspec,load')
%% ------------------------------------------------
%% The FONTSPEC package  <wspr.io/fontspec>
%% ------------------------------------------------
%% Copyright  2004-2017  Will Robertson, LPPL "maintainer"
%% Copyright  2009-2013  Khaled Hosny
%% ------------------------------------------------
%% This package is free software and may be redistributed and/or modified under
%% the conditions of the LaTeX Project Public License, version 1.3c or higher
%% (your choice): <http://www.latex-project.org/lppl/>.
%% ------------------------------------------------
%%^^A%%  fontspec.dtx -- part of FONTSPEC <wspr.io/fontspec>
%%^^A%%  Metadata for the package, including files and versioning

\RequirePackage{xparse}
\ProvidesExplPackage{fontspec}%
  {2020/02/21}{2.7i}{Font selection for XeLaTeX and LuaLaTeX}

%%^^A%%  fontspec-code-load.dtx -- part of FONTSPEC <wspr.io/fontspec>
\sys_if_engine_luatex:T
  {
    \RequirePackage{luaotfload}
    \lua_now:e{require("fontspec")}
    \RequirePackageWithOptions{fontspec-luatex}
    \endinput
  }
\sys_if_engine_xetex:T
  {
    \RequirePackageWithOptions{fontspec-xetex}
    \endinput
  }
\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}