swift

b5384bc8 - [cxx-interop] Support optional generic cases in enums

[cxx-interop] Support optional generic cases in enums This PR implements proper support for optional generic associated values in enum cases. Most of the code changes are supporting generic types in more contexts in the printer, the rest are making sure we handle the null pointer case when we try to get the declaration from the type that represents a generic parameter. rdar://131112273