The trick is to make it very ergonomic to return the error. I thought Scala had do notation to make this the case. In Rust, the try! macro (which returns on e

The trick is to make it very ergonomic to return the error. I thought Scala had do notation to make this the case. In Rust, the try! macro (which returns on error) is shorter than almost any other way to handle an error, so people usually use that.