unLomTrois / lexiCK3

Lexical analyzer and parser for CK3 files

What is this?

Golang implementation of linting PDXScript files for Crusader Kings 3

Structure

It is composed of three parts:

• lexer (tokenizer)
• parser (LL(1) parser)
• linter not updated yet

Lexer creates stream of tokens that is consumed by parser, catches lexical errors, like unknown tokens (e.g. you can't write !=)

Parser makes AST (Abstract Syntax Tree), catches syntax errors (e.g. not closed curly brace)

Todo

• Implement Lexer
• Add tests on Lexer
• Implement Parser
• Update Linter
• Add tests on Parser
• Make a VSCode extension

Example of work:

Raw file

Linted file:

P.S.

If you have zero knowledge in parsing, I recommend watch this playlist first: Building a Parser from scratch

Then you can read first 2-3 chapters of Compilers: Principles, Techniques, and Tools