Interface Foldable

fold.go:8–12

Foldable represents a type that can be folded into a single value based on its state. - T: the type of the value in the failure state (e.g., an error type). - U: the type of the value in the success state.

// - T: the type of the value in the failure state (e.g., an error type).
// - U: the type of the value in the success state.
type Foldable[T any, U any] interface {
	leftValue() T
	rightValue() U
	hasLeftValue() bool
}

// Fold applies one of the two functions based on the state of the Foldable type,
// and it returns the result of applying either successFunc or failureFunc.