tree 809a7757b49292281219c259fab657825cf9e7f1
parent 50c16719d73c5d8f5b19189b2a9902b110f48225
author Joe Tsai <joetsai@digital-static.net> 1555446140 -0700
committer Joe Tsai <thebrokentoaster@gmail.com> 1555452256 +0000

cmd/protoc-gen-go: used named types for special fields

Using a named fields gives us the flexibility to change the underlying
representation of special fields without needing to regenerate user code.

We add a named type for ExtensionFields, UnknownFields, and SizeCache.

Change-Id: I107cf82899850ea76665310ce79def60f0f7ab97
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/172402
Reviewed-by: Damien Neil <dneil@google.com>