Joe Tsai 9b22b9382e internal/impl: treat a nil oneof wrapper as if it were unset
The old implementation had the behavior where a nil wrapper value:
	m := new(foopb.Message)
	m.OneofField = (*foopb.Message_OneofUint32)(nil)
was functionally equivalent to it being directly set to nil:
	m := new(foopb.Message)
	m.OneofField = nil
preserve this semantic in both the table-drive implementation
and the reflection implementation.

Change-Id: Ie44d51e044d4822e61d0e646fbc44aa8d9b90c1f
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/189559
Reviewed-by: Herbie Ong <herbie@google.com>
2019-08-16 00:24:53 +00:00
..