NullabilitySuffix enum

Suffix indicating the nullability of a type.

This enum describes whether a ? or * would be used at the end of the canonical representation of a type. It's subtly different the notions of "nullable", "non-nullable", "potentially nullable", and "potentially non-nullable" defined by the spec. For example, the type Null is nullable, even though it lacks a trailing ?.

Inheritance

Constructors

NullabilitySuffix()
const

Values

question → const NullabilitySuffix

An indication that the canonical representation of the type under consideration ends with ?. Types having this nullability suffix should be interpreted as being unioned with the Null type.

star → const NullabilitySuffix

An indication that the canonical representation of the type under consideration ends with *. Types having this nullability suffix are called "legacy types"; it has not yet been determined whether they should be unioned with the Null type.

none → const NullabilitySuffix

An indication that the canonical representation of the type under consideration does not end with either ? or *.

Properties

hashCode → int
The hash code for this object.
read-onlyinherited
index → int
A numeric identifier for the enumerated value.
read-onlyinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

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.
inherited

Constants

values → const List<NullabilitySuffix>
A constant List of the values in this enum, in order of their declaration.
[question, star, none]