How I Parse 14 Languages With One Function (opens in new tab)

Building a polyglot code parser with tree-sitter that handles Python, Rust, Dart, Go, and 10 more — without writing 14 parsers. I needed to extract every function and class from any codebase a user throws at me — Python, Dart, Rust, Java, Go, C++, all of them. I started with Python’s built-in “ast” module. It worked — for Python. Then I needed JavaScript. And Rust. And 11 more. I wasn’t about to write 14 parsers. I ended up with a single “parse_file()” function that handles all 14 languages. ...