How to use Generic type on DynamicBuffer

Unity Engine
,
1

Hi everyone.

Why do mu code isn’t working and ask me for T to be a non-nullable type ? (On the Function name, and GetBuffer<T>)

public static class Helper {
        public static DynamicBuffer<T> EnsureHaveEmptyBuffer<T>(EntityManager entityManager, Entity entity, ComponentType componentType)
            where T : struct, IBufferElementData
        {
            if (!entityManager.HasComponent(entity, componentType))
                entityManager.AddComponent(entity, componentType);

            var buffer = entityManager.GetBuffer<T>(entity);
            buffer.Clear();
            return buffer;
        }

        public static DynamicBuffer<T> EnsureHaveEmptyBuffer<T>(EntityManager entityManager, Entity entity)
            where T : struct, IBufferElementData
        {
            return EnsureHaveEmptyBuffer<T>(entityManager, entity, ComponentType.ReadWrite<T>());
        }
}

I added struct to fix the issue, and have <T> the same “where” as GetBuffer but still have the issue ?!

2

You are asking in wrong forum section.
Head to Scripting ECS, or jobs forum section.

3

The correct constraint to use in most cases in ECS code is : unmanaged. This is more restrictive than : struct, because it ensures that the type only consists of unmanaged structs/primitives, and contains no managed references, all the way down.

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