CStruct12
final case class CStruct12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12](_1: Tag[T1], _2: Tag[T2], _3: Tag[T3], _4: Tag[T4], _5: Tag[T5], _6: Tag[T6], _7: Tag[T7], _8: Tag[T8], _9: Tag[T9], _10: Tag[T10], _11: Tag[T11], _12: Tag[T12]) extends Tag[CStruct12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12]] with StructTag