Optional class
Marks a field as optional (field can be null or missing)
- Inheritance
-
- Object
- Constraint
- Optional
- Annotations
-
- @Target.new({TargetKind.getter, TargetKind.field})
Constructors
- Optional(Constraint constraint)
-
const
-
Optional.all(List<
Constraint> constraints) -
factory
-
Optional.allEach(List<
Constraint> constraints) -
factory
Properties
- constraint → Constraint
-
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
validate(
dynamic value, ValidationContext context) → void -
Validates the value within the provided context
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited