`concrete_subtype` does not behave as expected

General Issues and Bug Reporting
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Summary

v37.00 enabled concrete_subtype, but it doesn’t seem very useful besides being a filter constraint. It doesn’t allow the instantiation of the type it captures, which it really should as the type is statically known to be concrete, and @editable usage seems to be not enabled yet.

Please select what you are reporting on:

Verse

What Type of Bug are you experiencing?

Verse

Steps to Reproduce

using { /Verse.org/SceneGraph }

test_component := class<final><final_super>(component) {
  # ERROR: The editable attribute is not supported for data definitions of this type.(3604)
  @editable
  PrefabType: concrete_subtype(entity)

  OnSimulate<override>()<suspends>: void = {
    # ERROR: PrefabType is not a macro.

    # Spawn the prefab
    Prefab := PrefabType {}

    # Do something with the `Prefab` value.
  }
}

Expected Result

  • Instantiating from the captured type should be permitted as the type is known to be concrete.
  • @editable usage of concrete_subtype should be permitted

Observed Result

  • Cannot instantiate an object from the concrete subtype.
  • @editable is not permitted yet.

Platform(s)

UEFN (v37.00)