tree fa1b663a579175b133ad61bdebfedfd804e0f7d6
parent 3924625c77af1a1b2e7d9212a21407d3bbf19e08
author Herbie Ong <herbie@google.com> 1567754988 -0700
committer Herbie Ong <herbie@google.com> 1567804505 +0000

encoding/protojson: add MarshalOptions.EmitUnpopulated

Add option to marshal out all fields including unset ones except for
unset oneof fields and extension fields.

This is to make V2 compatible with V1's EmitDefaults option.

Change-Id: Ifa7bae48e82740b623c74f936bcbe9e66b11344a
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/193759
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>