As I have nearly no experience with dealing with such big projects with lots of libraries entangled, I'd like to be taught how to read a piece of
luatex code and understand it.
I have three examples in mind:
\directluaprimitive (to understand the tex2lua route);
tex.sprintfunction (to understand the lua2tex route);
tex.getboxfunction (to understand how
Note: when travelling for summer holidays, I can understand people speaking
C provided they speak slowly but I'm a bit too shy to speak myself :)