tree c8f5df837e4e0f6d9e4dc55a0d4b5edaf0fa33e0
parent af57087245ed29594751a2cd47c3ca4d7fb8dfe9
author Joe Tsai <joetsai@digital-static.net> 1562894588 -0700
committer Joe Tsai <joetsai@digital-static.net> 1563224878 +0000

encoding: unify MessageSet extension handling logic

This CL unifies common MessageSet logic in prototext and protojson
into the messageset package. While we are at it, also enable
MessageSet support only if the proto1_legacy build flag is enabled.

Change-Id: I1a7d475e8bb1dad61ecd286df45e4239e5bef072
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/185898
Reviewed-by: Damien Neil <dneil@google.com>