[Dev-luatex] Very simple sample?

[Javier Bezos]

Another question:

How can I read arbitrary TeX input? Or is this part
still unfinished? Currently, LuaTeX only accepts
UTF-8 input, right? But let's assume we have:

<latin 1 text> \arabic{<iso arabic text>} <latin 1 tex>

ie, two input encodings in the same line. I don't still
understand how encodings work.

Javier

PS. Here is a more complete example with LaTeX (or
more exactly TeX inside LaTeX...):

\documentclass{book}

\def\lua#1{\directlua0\expandafter{\detokenize{#1}}}

\def\sub#1{%
  \lua{
    tex.print("\\subsection{#1}");
    tex.print("\\message{Show a message}");
    tex.print("Argument \\\#1 is #1")
}}

\begin{document}

\lua{tex.print("\\section{Hola $\\sin a_0^2$}");}

\sub{Sub section}

\end{document}