loeg • yesterday at 11:11 PM

  let mut file = File::create("foo.txt").context("failed to create file")?;

Of all the things I find hard to understand in Rust, this isn't one of them.

snuxoll • yesterday at 11:19 PM

I don't really see it as any more or less verbose.

If I return Result<T, E> from a function in Rust I have to provide an exhaustive match of all the cases, unless I use `.unwrap()` to get the success value (or panic), or use the `?` operator to return the error value (possibly converting it with an implementation of `std::From`).

No more verbose than Go, from the consumer side. Though, a big difference is that match/if/etc are expressions and I can assign results from them, so it would look more like

    let a = match do_thing(&foo) {
      Ok(res) => res,
      Err(e) => return e
    }

instead of:

     a, err := do_thing(foo)
     if err != nil {
       return err // (or wrap it with fmt.Errorf and continue the madness
                  // of stringly-typed errors, unless you want to write custom
                  // Error types which now is more verbose and less safe than Rust).
    }

I use Go on a regular basis, error handling works, but quite frankly it's one of the weakest parts of the language. Would I say I appreciate the more explicit handling from both it and Rust? Sure, unchecked exceptions and constant stack unwinding to report recoverable errors wasn't a good idea. But you're not going to have me singing Go's praise when others have done it better.

Do not get me started on actually handling errors in Go, either. errors.As() is a terrible API to work around the lack of pattern matching in Go, and the extra local variables you need to declare to use it just add line noise.