Add assert(field != null) functionality about freezed HOT 8 CLOSED

If we're going with custom annotations, I would go with a @nullable annotation instead:

@freezed
abstract class MyClass with _$MyClass {
  factory MyClass({
    @required String notNullable,
    @required @nullable String nullable,
  }) = _MyClass;
}

Thought?

from freezed.

All properties unless:

• they are annoted with @nullable
• they are named parameters without a @required
• they are positional optional parameter

from freezed.

I didn't add it because I can't think of any good enough syntax for it.
@required cannot be used here, because we can have required nullable parameters.

Unless you have a proposal (that doesn't rely on a custom annotation), then I'd prefer to wait for non-nullable types to land.
Non-nullable types should remove the need for such an assertion.

from freezed.

Would it be possible to check if the package "non_null" is installed and if so use its @nonNull annotation?

from freezed.

I'd love to have this. This way I could replace all my "data classes" with freezed classes.
I'd add a @nonNull annotation to this project.

from freezed.

Now that freezed will have an annotation package, it should be fine.

from freezed.

I like it! Will only @required properties be checked for null or all properties which are not annoted with @nullable?

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This will also be applied to copyWith and the future copyAs by the way.

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