tree 82e0de31c4492cf9627b96697cc383eed32b5343
parent 6e095998aea3027192cc3f412407c453deaa2ae0
author Joe Tsai <joetsai@digital-static.net> 1567729515 -0700
committer Joe Tsai <joetsai@digital-static.net> 1568935635 +0000

internal/impl: handle legacy ExtensionDesc form

Add support for an ExtensionDesc with only Field populated as returned by
protoV1.ExtensionDescs. Rather than panicking when TypeDescriptor is called,
return a placeholder that preserves the name and/or number.

Change-Id: I60352a7aec8ccd8a0c1fb08db5891043a441695f
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/193725
Reviewed-by: Damien Neil <dneil@google.com>