Dan Gohman (May 22 2020 at 19:28): Dan Gohman (May 22 2020 at 19:28):How weird would it be to have an API that returns a Result<Result<&mut Self, Trap>>?
Dan Gohman (May 22 2020 at 19:30):I guess, we already have Func::call which converts the Trap into an Error, so maybe that's better.
Yury Delendik (May 22 2020 at 19:30):Really weird. Will downcastnot work for outer error?
Dan Gohman (May 22 2020 at 19:34):Yeah, I think that's the better way. Use anyhow::Error, and just have users downcast to Trap when needed
Josh Triplett (Aug 08 2020 at 16:36):@Dan Gohman Found this thread rather late, but: the other way to do that would be a thiserror type with one branch for Trap and another for other errors.
Josh Triplett (Aug 08 2020 at 16:36):Then it's a simple match rather than a downcast.
Last updated: Dec 06 2025 at 06:05 UTC