Maybe<T> class

A value that knows "missing" from null. Use it for PATCH input.

final Maybe<String?> bio; // default: const Maybe.missing()

if (body.bio.isPresent) user.bio = body.bio.value;

Constructors

Maybe(T value)

The key was sent, with value (which can be null when T is nullable).

const

Maybe.missing()

The key was not sent.

const

Properties

hashCode → int

The hash code for this object.

no setter, override

isPresent → bool

true when the key was sent.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → T

The value. Throws a StateError when the key was missing.

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.

override

Operators

operator ==(Object other) → bool

The equality operator.

override