It's a bit annoying that there is a standard desugaring of all of this, but there's no actual way of implementing this sugaring yourself. I guess you could have a token macro (or whatever they're called) at the top scope and do it yourself?

Anyway, my conclusion is that in order to learn Rust you can't use any syntactic sugar the language provides, those are 'expert features'. There's no way I'd be able to figure out why this happens. Do rust-analyzer provide a way of desugaring these constructs?