hashCode generator enhancement

When the built-in generator (ALT + Insert on Windows) is used for example in model classes, we can use it for generating ==, hashCode and toString() methods.

Let’s say we have this model class:

class Example {
  const Example({
    this.category,
    this.id,
    this.isFavorite,
    this.name,
    this.price,
    this.startDate,
    this.expirationDate,
  });

  final Category category;
  final int id;
  final bool isFavorite;
  final String name;
  final int price;
  final DateTime startDate;
  final DateTime expirationDate;
}

Generated hashCode method for this example is:

@override
  int get hashCode =>
      category.hashCode ^
      id.hashCode ^
      isFavorite.hashCode ^
      name.hashCode ^
      price.hashCode ^
      startDate.hashCode ^
      expirationDate.hashCode;

Instead, I think it would be better if it was generating this using hashValues (if it would have more than 1 argument and less than 20)

@override
  int get hashCode => hashValues(category, id, isFavorite, name, price, startDate, expirationDate);

[stevemessick]

https://youtrack.jetbrains.com/issue/IDEA-249561

[bwilkerson]

Yes, and when the new static methods in Object land, we should definitely update the generator to make use of them. Given how soon they will likely land, I don’t think it’s worth changing it to use hashValues.