None<A> class
Represents the absence of a value. It's a concrete implementation of Option.
Use None to indicate that no value exists, typically in scenarios where
in other languages one might use null or undefined.
Example:
final optionValue = None<int>();
Constructors
- None()
-
const
Properties
- hashCode → int
-
The hash code for this object.
read-onlyoverride
- 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.
override