DataField class

Specify the comparator and hash function to use for a given property.

This annotation controls the comparator and hash function to use for a given property when generating the equals and hashCode functions for a given class that is annotated with DataClass or CellExtension.

The function equals is used, instead of ==, to compare whether two properties are equal. Similarly the function hash is used to compute the hash code of the property instead of the Object.hashCode property.

Example:

@DataClass()
class Point {
  // Use `listEquals` from `flutter:foundation.dart` as the comparator and
  // `Object.hashAll` as the hash function for this property.
  @DataField(
     equals: listEquals,
     hash: Object.hashAll
  )
  final List<int> coordinates;

  ...

  @override
  bool operator ==(Object other) => _$PointEquals(this, other);

  @override
  int get hashCode => _$PointHashCode(this);
}