A description of this package.
https://github.com/antlr/grammars-v4/blob/master/json/JSON.g4 https://blog.gopheracademy.com/advent-2014/parsers-lexers/
https://engineering.mongodb.com/post/transpiling-between-any-programming-languages-part-1
https://medium.com/dailyjs/compiler-in-javascript-using-antlr-9ec53fd2780f
https://tomassetti.me/antlr-mega-tutorial/
http://www.cse.chalmers.se/edu/year/2015/course/DAT150/lectures/proglang-04.html
https://github.com/elfsternberg/riggedregex
https://willowtreeapps.com/ideas/an-introduction-to-language-lexing-and-parsing-with-antlr