I'm referring to the semicolon insertion described in the README as, "When a newline is seen after the following token kind, a semicolon is inserted".

> Procedures don't even return things

Oberon allows return values from functions (which are still declared with the PROCEDURE keyword). It looks like the same is true in Titania:

    proc_body = decl_sequence ["begin" stmt_sequence] ["return" expr] "end".

<https://github.com/gingerBill/titania/blob/085b7b5bcf7f06076...>

I'm curious what you're going to do with the code generator. Parsers are easy and can be completed in a day or two. Even with a reference implementation, however, it's the backend that's a slog.