Unexpected productivity boost of Rust

>The code will compile just fine. The Zig compiler will generate a new number for each unique 'error.*'

This is wild. I assume there's at least the tooling to catch this kind of errors right?

There's no special tooling to catch this, because nobody catches an error with if-else—it's simply not idiomatic. Everyone uses switch statements in the catch block, and I've never seen anybody using anything other than switch, when catching an error.

The real problem is not about the if-else, its that he's comparing to the global error set, and not to the FileError error set he created specifically to define AccessDenied.