Cast to Enum type fails

[ikuko]

Describe the bug in detail:
Cast to Enum type fails

Provide steps/code to reproduce the bug:

public class TEST : UdonSharpBehaviour
{
    public Light component;
    private void Start()
    {
        component.type = (LightType)0;
    }
}

Expected behavior:

[<color=yellow>UdonBehaviour</color>] An exception occurred during Udon execution, this UdonBehaviour will be halted.
VRC.Udon.VM.UdonVMException: The VM encountered an error!
Exception Message:
  An exception occurred during EXTERN to 'UnityEngineLight.__set_type__UnityEngineLightType__SystemVoid'.
      Parameter Addresses: 0x00000026, 0x0000026C
  
  Cannot retrieve heap variable of type 'Int32' as type 'LightType'

Additional Information:
I think other enum types will give similar results

[MerlinVR]

This has been waiting on VRC to add handling for int to enum conversions

But seeing as nothing has been exposed in Udon other than built-in Unity functions in the last year, I can look at adding forwarding to object array indices since enum arrays are also missing which will generate a bunch of garbage, but will let it work at least.

[ikuko]

I dealt with it with the following code.
Not a good code -;

int lightType = 1;// LightType.Directional
switch (lightType)
{
    case 0: return LightType.Spot;
    case 1: return LightType.Directional;
    case 2: return LightType.Point;
    case 3: return LightType.Area;
}