HasKind class abstract mixin

Interface for classes that can tell their Kind.

If you extend HasKind you should override runtimeKind to return the Kind of the class. This is used by HasKind to implement hashCode, operator ==, and toString.

Example

import 'package:kind/kind.dart';

void main() {
  // HasKind mixin gives you `==` and `hashCode`
  final person = Person(name: 'Bob');
  assert(person == Person(name: 'Bob'));
  assert(person.hashCode == Person(name: 'Bob').hashCode);

  // HasKind mixin gives you `toString()`
  print(person.toString());
}

class Person with HasKind {
  static const kind = ImmutableKind<Person>.withConstant(
    name: 'Example',
    blank: const Person(name: ''),
    copy: _copy,
  );

  final String name;

  Kind<Person> get runtimeKind => kind;

  const Person({
    required this.name,
  });

  static Person _copy(Mapper f, Person t) {
    final name = f<String>.required(t.name, 'name');
    if (f.canReturnSame) {
      return t;
    }
    return Person(
      name: name,
    );
  }
}

Implementers

• FieldMirror

Constructors

HasKind()

const

Properties

hashCode → int

The hash code for this object.

no setter, override

runtimeKind → Kind<Object>

Kind of this object.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

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