Extract Payload for enum cases having associated value

[gwendal.roue (Gwendal Roué)]

@ExFalsoQuodlibet

I just realized that instead of generating the computed properties for an enum, we could generate the keypaths, and use keypath member lookup to get the properties automatically

Like below?

let result: Result<S, F> = ...
result.success // does not compile
result.failure // does not compile
let success = result[keypath: \.success]) // S?
let failure = result[keypath: \.failure]) // F?

This would be an interesting twist of Automatically derive properties for enum cases - #5 by stephencelis. No properties. Only key paths. But this is another pitch.