tree 159c99303584028edb7af562b5fc0e2b73dfd242
parent 47d5893acf194880200cb01de2f2fbc565d38fd1
author Damien Neil <dneil@google.com> 1569960316 -0700
committer Damien Neil <dneil@google.com> 1570208865 +0000

internal/impl: weak field bugfixes

Fix a reversed error check in impl.Export{}.WeakNil.

Check to see if we have a type for the weak field on marshal/size.

Treat a typed nil valued in XXX_Weak as not indicating presence for
the field.

Change-Id: Id667ac7eb4f53236be9e181017082bd8cd21d115
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/198717
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>