Tectonic: a complete, modernized, self-contained TeX/LaTeX engine

> Tectonic has been forked from the old-fashioned WEB2C implementation of TeX

TeX was written in WEB which was a literate programming version of pascal (with, I believe, some c-like pre-processor support). WEB2C is a pascal-to-C transpiler. a pascal-to-rust transpolar would be interesting.