tree 3a7613b43fad88928515ec939e4bf8f8116ca608
parent 872b50047a285b51cdbd767985719925eca2ec9a
author Joe Tsai <joetsai@digital-static.net> 1554324053 -0700
committer Joe Tsai <thebrokentoaster@gmail.com> 1554844725 +0000

reflect/protoreflect: add KnownFields.WhichOneof

Add a method that provides efficiently querying for which member field
in a oneof is actually set. This is useful when dealing with oneofs
with many member fields.

Change-Id: I918b566c432f8bdd24dcecbb5501d231ffefef29
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/170580
Reviewed-by: Damien Neil <dneil@google.com>