7 lines
353 B
Text
7 lines
353 B
Text
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The package, which works both for Plain TeX and for LaTeX,
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defines the \ifPDFTeX, \ifXeTeX, and \ifLuaTeX conditionals for
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testing which engine is being used for typesetting. The package
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also provides the \RequirePDFTeX, \RequireXeTeX, and
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\RequireLuaTeX commands which throw an error if pdfTeX, XeTeX
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or LuaTeX (respectively) is not the engine in use.
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