tree f6244579bba9e4d218f5f3b2067f3dc698da91a9
parent 9afe9bb78b4f5e9015dd310c03875443c14125ec
author Damien Neil <dneil@google.com> 1579297251 -0800
committer Damien Neil <dneil@google.com> 1581109788 +0000

proto, internal/errors: add Error sentinel, errors.Wrap

Add a sentinel proto.Error error which matches all errors returned by
packages in this module.

Document that protoregistry.NotFound is an exact sentinel value for
performance reasons.

Add a Wrap function to the internal/errors package and use it to wrap
errors from outside sources (resolvers). Wrapped errors match
proto.Error.

Fixes golang/protobuf#1021.

Change-Id: I45567df3fd6c8dc9a5caafdb55654827f6fb1941
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/215338
Reviewed-by: Joe Tsai <joetsai@google.com>