You also need to decide whether to write your own parser and lexer or use automatic parser and scanner generators (e.g. flex and bison). In this series of posts, I'll show you how to write a lexer (or scanner) and recursive descent parser by hand. Using a parser generator is probably easier, but I haven't tried it so I could be wrong. You could probably also use a scanner generator for lexing, but hand-write your own parser. Basically, do whatever you like, but I'm only going to talk about hand-writing a lexer and parser for the rest of this series, so if you want to use bison and flex you're on your own.🏁

You also need to decide whether to write your own parser and lexer or use automatic parser and scanner generators (e.g. flex and bison). In this series of posts, I'll show you how to write a lexer (or scanner) and recursive descent parser by hand. Using a parser generator is probably easier, but I haven't tried it so I could be wrong. You could probably also use a scanner generator for lexing, but hand-write your own parser. Basically, do whatever you like, but I'm only going to talk about hand-writing a lexer and parser for the rest of this series, so if you want to use bison and flex you're on your own.🏁