It's always impressive how far people can take TypeScript and even build parsers with it. But this is limited to inlined string literals and cannot read files (a TS limitation).

I wonder if the author has a use case in mind for this that I don't see. Like if you are only using TS, what's the point of protobuf? If you are exchanging data with programs written in other languages why avoid the protobuf tooling that you need anyway?

Maybe this is just a fun toy project to write a parser in TS?