Result<T, E> class

Result<T, E> is a type that represents either success or failure

It can be used to transparently return results from functions than can possibly fail, whereas exceptions have to be documented manually.

Constructors

errorOrNull → E?: Returns the error if isOErr is true, otherwise returns null
no setter
hashCode → int: The hash code for this object.
no setteroverride
isErr → bool: Whether this is a failed result
no setter
isOk → bool: Whether this is a succesful result
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
valueOrNull → T?: Returns the value if isOk is true, otherwise returns null
no setter

cast<U, F>() → Result<U, F>: Returns a Result<U, F> where value/error is cast to the corresponding type.
contains(T value) → bool: Returns true is isOk is true and if value equals value, otherwise returns false
containsErr(E error) → bool: Returns true if isErr is true and if error equals error, otherwise returns false
errorOr(E defaultError) → E: Returns the error if isOErr is true, otherwise returns defaultError
flatMap<U>(Result<U, E> f(T)) → Result<U, E>: Maps Result<T, E> to Result<U, E>, leaving an Err value untouched.
flatMapOrElse<U, F>(Result<U, F> f(T), Result<U, F> e(E)) → Result<U, F>: Maps Result<T, E> to Result<U, E>, leaving an Err value untouched.
map<U>(U f(T)) → Result<U, E>: Maps the value of a successful Result<T, E> from T to U, leaving an error untouched.
mapErr<F>(F f(E)) → Result<T, F>: Maps Result<T, E> to Result<T, F>, leaving an Ok value untouched.
mapOrElse<U>(U ok(T), U err(E)) → U: Maps a Result<T, E> to U by applying ok to a contained value or err to a contained error.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
override
valueOr(T defaultValue) → T: Returns the value if isOk is true, otherwise returns defaultValue