Add support for annotating a specific constructor to be used

[jakemac53]

This allows you to not have a public constructor, or have a specialized one just for json serialization.

[leoshusar]

Any idea when this could be on the roadmap?

I am trying to allow setting ID only by JSON deserialization and private constructor would be perfect for this:

class User {
  final String? id;
  String name;

  User._(this.id, this.name); // use for deserialization
  User(this.name)
    : id = null;
}

My other idea was to use private field and public setter, but private fields are ignored, so that's another no way.
At least allowing private fields to be included for (de)serialization would be great for me.

[kevmoo]

Fixed in 368a8c7

[kevmoo]

Landed in https://pub.dev/packages/json_serializable/versions/6.0.0