Comment by tester756

>The more general advice for error handling is that you should try to make APIs that require very little in-line error handling. Instead, keep errors behind the APIs, maybe collect them in a list, or only keep the first or last error, and allow to handle them at a later point (out-of-line).

I guess you wanted to say that instead of printing just what's wrong at some point, be smarter and try to build some handier error handling like attaching error to ast's node and then maybe do something with it