Result
Inherits from: Object
Abstract base class for the Result pattern (Success/Failure).
Result encapsulates the outcome of an operation that may succeed or fail,
replacing ad-hoc nil checks and error flags with a composable, type-safe
protocol. Use the factory methods Result success: and Result failure:
to create instances. Pattern-match on the result with ifSuccess:,
ifFailure:, or onSuccess:onFailure:, and chain computations with
then:, map:, and flatMap:.
Test
(Result success: 42) isSuccess >>> true
(Result success: 42) value >>> 42
(Result failure: 'oops') isFailure >>> true
(Result failure: 'oops') error >>> 'oops'
Example
"Chain a sequence of fallible operations"
(Result success: 5)
map: [:v | v * 2]
then: [:v | Result success: v + 1]Class Methods
primitives
class failure:
class success:
Instance Methods
uncategorized
printString
Return a generic printable representation.
Test
Result new printString >>> 'a Result'