resultatyper
Resultatyper, or result types, refer to type constructs that model the outcome of a computation. They typically represent one of two possibilities: a successful value or some form of error or alternative result. This approach makes outcomes explicit and predictable, reducing the reliance on exceptions for control flow.
Characteristics of resultatyper include that they are often algebraic data types or sum types. A value of
Common language implementations include:
- Rust: Result<T, E> with Ok(T) for success and Err(E) for failure.
- Haskell: a similar pattern via Either a e or a custom Result type.
- Swift: Result<Success, Failure: Error> with success and failure cases.
- Kotlin and other languages provide comparable constructs or patterns, sometimes using Optional/Optional-like types for absence and
Usage typically involves explicit handling of both branches, often through map and flatMap (or andThen) operations,