miniblog.

Really cute approach to reporting type errors: when there's a type error, show an example of a runtime error that the type check has prevented! Data-Driven Techniques for Type Error Diagnosis https://escholarship.org/uc/item/59s4h4pv

Playing with optional type signatures in Python, I realise that the return type is the most important to me. I'd much rather have a function with only a return type instead of a function with only parameter types. It's often quick to add too.

I'm experimenting with diagnostics formatting. * I've added a left margin, showing both the file name and line numbers * I'm showing one line of context above/below the offending line. * I'm using grey for comments. What do you think? Is there anything you'd change?