Prajwal S N (Oct 12 2022 at 18:02): Prajwal S N (Oct 12 2022 at 18:02):What is the difference between a Result Str {} and Result Str *?
Ayaz Hafiz (Oct 12 2022 at 18:05):The first means if it returns an Err, the error payload is an empty record. The latter means if the error payload is an unbound value (which in practice means it should not return an error)
Brendan Hansknecht (Oct 12 2022 at 18:32):Really? I thought that Result Str * could mean Result Str []*. That would mean can return any error payload at all. I guess that is not the case?
Brian Carroll (Oct 12 2022 at 18:45):Depends if it's an argument or a return value. If it's a return value that's compatible with any type, then it must never happen!
Brian Carroll (Oct 12 2022 at 18:46):Because there is no real value that is compatible with all possible types
Brian Carroll (Oct 12 2022 at 18:46):So if a function signature has this return type then it never returns the Err case
Brendan Hansknecht (Oct 12 2022 at 18:50):Ok. makes sense.
Last updated: Jul 26 2025 at 12:14 UTC