_________________ The iftex package v0.2 This very simple package, for both Plain TeX and LaTeX, defines the \ifPDFTeX, \ifXeTeX, and \ifLuaTeX boolean for testing whether PDFTeX, or XeTeX, or LuaTeX is being used for typesetting. Also provides the \RequirePDFTeX, \RequireXeTeX, and \RequireLuaTeX command which throws an error if PDFTeX, XeTeX and LuaTeX (respectively) is not the engine in use. ______________ Vafa Khalighi vafakh84@gmail.com Copyright 2010 Distributed under the LaTeX Project Public License