A recoverable success or error result.
Signature
enum Res[T, E] { Ok(T), Err(E) }Use ? to propagate Err to a compatible Res-returning boundary, or match both cases locally.
Cases
Ok(T)- Contains a successful value of T.
Err(E)- Contains a recoverable error of E.
Examples
Match a result
A result carries either its value or its error payload.
Devices
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main.kj
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Output 0
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State
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Expected output
4
Rust definition
Value::Enum with the concrete Res[T, E] type and checked case payload.
View Rust documentation →Support: runtime