CheckTeXEngine (rev. 1.1)
iftex package ¶
\usepackage{iftex}
\ifPDFTeX
...
\else
...
\fi
\ifXeTeX
...
\else
...
\fi
\ifLuaTeX
...
\else
...
\fi
\RequirePDFTeX
\RequireXeTeX
\RequireLuaTeX
ifxetex, ifluatex package ¶
\usepackage{ifxetex}
\ifxetex
...
\else
...
\fi
\usepackage{ifthen,ifxetex}
\ifthenelse{\boolean{xetex}}{..<true>..}{..<false>..}
\usepackage{ifluatex}
\ifluatex
...
\else
...
\fi