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LuaTeX is an extended version of [[PdfTeX- Old Content]] using [http://www.lua.org Lua], as an embedded scripting language. The LuaTeX project's main objective is to provide an open and configurable variant of TeX while at the same time offering downward compatibility.

* other [[:Category:Lua|Lua topics]]* how [[LuaTeX callbacks|Callbacks]] work in Context* http://luanet.net/luaThe [[Lua]] in LuaTeX

* [http://luatex.org/ LuaTeX homepage]== Some tricks == === Testing for UTF-8-aware TeX === <i>(By [* [Userhttp:Taco|Taco]]); this hint should be place to a better location on the wiki</i> For luatex, one may test if <code>\directlua</code> is definedwww.lua. The next weird macro definition should work for testing xetexorg/manual/luatex, because only xetex and luatex accept 5- and 6-byte caret notation .1/manual.html Lua Manual] (hex 22 == double quoteReference)* [http:<texcode>\def\"{0}\expandafter\def\csname^^^^^00022\endcsname{1}\ifnum\"=0 \message{tex82}\else\message{newstuff}\fi</texcode> But that is not quite the same as testing for native UTF/lua-8users. Better is a trick like this: <texcode>\def\test#1#2!{\def\secondarg{#2}}\test χ!\relax % That's Chi, a 2org/wiki/LuaDirectory Lua-byte utf-8 sequenceUsers Wiki] (Tutorials etc.)\ifx\secondarg\empty \message{newstuff}\else \message{tex82}\fi<* [http://texcode> ConTeXt offers <code>\beginNEWTEX .www.luatex. \endNEWTEX<de/code> to test if one is using Patrick’s German LuaTeX or XeTeX.Blog]

See [[Fonts in LuaTexLuaTeX]]