I find it interesting there is no mention of Backus-Naur Form (BNF) in here. It's the formal language to describe the syntax of programming languages. Nor of t

I find it interesting there is no mention of Backus-Naur Form (BNF) in here. It's the formal language to describe the syntax of programming languages. Nor of there a mention of Flex/Bison or Lex/Yacc. I know those tools aren't cool... being decades old and all. But they are very battle hardened and make development much faster. I don't know the background of the author or if they have a computer science degree. And I am most definitely not one to do something one way just because that is the way it has always been done. But articles like this seem to fly in the face of decades of computer science advancement. As a fun project where you learn a lot, great, I just hope someone doesn't try to use this to make anything that isn't a toy language.