tree 950ef79ac076da615ef2ba3407f92940cca72641
parent db38ddde7d12ec30fea31c1ffdd887539eb0e88f
author Joe Tsai <joetsai@digital-static.net> 1557210449 -0700
committer Joe Tsai <joetsai@digital-static.net> 1557365210 +0000

internal/impl: use XXX_unrecognized exclusively for unknown fields

The protobuf data model makes no distinction between unknown fields
that are within the extension field ranges or not. Now that we eagerly
unmarshal extensions, there is even less need for storing unknown
fields in the extension map. Instead, use the XXX_unrecognized field
exclusively for this purpose.

Change-Id: I673a7d6259fe9fdbdc295bcfa8252ef4da415343
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/175579
Reviewed-by: Damien Neil <dneil@google.com>