4 ms·

> the ideal implementation should include some short syntax to allow converting from Result to result value and throw panic for errors As far as I know rust im

• masklinn 6y ago
  No. `?` will short-circuit the Err case, possibly converting an error value, but it doesn't panic. `foo?` desugars to[-1]: match foo { Ok(v) => v, Err(e) => return From::from(e) } What "converts a Result into a value and panics on error" is Result::unwrap[0], or Result::expect[1] (for a custom panic message). [-1] as of rustc 1.46 anyway, I don't know how "try blocks" will effect `?`, though possibly the combination of "try blocks" and unwrap would make it easier to just panic an entire function: currently each Result site has to be unwrapped by hand whereas otherwise you could just `?` every site normally and unwrap the entire block I guess? [0] https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap https://doc.rust-lang.org/std/result/enum.Result.html#method... [1] https://doc.rust-lang.org/std/result/enum.Result.html#method.expect https://doc.rust-lang.org/std/result/enum.Result.html#method...