miniblog.

Counter-intuitively, if you're writing a parser for a programming language, you need it to be a total function. As soon as you build IDE tooling, you need ASTs from invalid or incomplete input. The parser should return (Ast, List<Error>) rather than Result<Ast, Error>.

I've been using a 'golden tests' library for testing my parser, and it's just delightful. Rather than writing a verbose assertion about the resulting AST, I can just re-run my tests until the output looks good!

I've been using a 'golden tests' library for testing my parser, and it's just delightful. Rather than writing a verbose assertion about the resulting AST, I can just re-run my tests until the output looks good! I'm using https://github.com/jfecher/golden-tests currently, which can automatically update the output in the file. Example commit: