Maybe<T> class sealed

Container that either holds a value or an exception that was raised while computing the value.

Implementers

• MaybeError
• MaybeValue

Constructors

Maybe(T value)

Create a Maybe that holds a computed value.

const

factory

Maybe.error(Object error, [StackTrace? stackTrace])

Create a Maybe that holds the exception error.

const

factory

Maybe.wrap(T compute())

Compute a value using compute and wrap the result in a Maybe.

factory

Properties

error → Object?

Exception thrown during the computation of value.

no setter

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

unwrap → T

Get the wrapped value or throw error if this Maybe represents an error.

no setter

value → T?

The value or null if there was an error during computation

no setter

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override

Static Methods

wrapAsync<T>(Future<T> compute()) → Future<Maybe<T>>

Compute a Future value using compute and wrap the result in a Maybe.