Option<T> class sealed

Returns optionally given type T wrapped in Some.

If no value is returned, None is returned instead.

Implementers

• None
• Some

Available Extensions

• OptionExtension

Constructors

Option()

const

Option.none()

const

factory

Option.some(T value)

const

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isNone → bool

no setter

isSome → bool

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

map<TResult extends Object?>({required NoneCallback<TResult> none, required SomeCallback<TResult, T> some}) → TResult

mapOrNull<TResult extends Object?>({NullableNoneCallback<TResult>? none, NullableSomeCallback<TResult, T>? some}) → TResult?

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

when<TResult extends Object?>({required ValueNoneCallback<TResult> none, required ValueSomeCallback<TResult, T> some}) → TResult

Operators

operator ==(Object other) → bool

The equality operator.

inherited