[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/google.golang.org/protobuf/internal/errors/is_go112.go b/vendor/google.golang.org/protobuf/internal/errors/is_go112.go
new file mode 100644
index 0000000..f90e909
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/errors/is_go112.go
@@ -0,0 +1,39 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.13
+
+package errors
+
+import "reflect"
+
+// Is is a copy of Go 1.13's errors.Is for use with older Go versions.
+func Is(err, target error) bool {
+ if target == nil {
+ return err == target
+ }
+
+ isComparable := reflect.TypeOf(target).Comparable()
+ for {
+ if isComparable && err == target {
+ return true
+ }
+ if x, ok := err.(interface{ Is(error) bool }); ok && x.Is(target) {
+ return true
+ }
+ if err = unwrap(err); err == nil {
+ return false
+ }
+ }
+}
+
+func unwrap(err error) error {
+ u, ok := err.(interface {
+ Unwrap() error
+ })
+ if !ok {
+ return nil
+ }
+ return u.Unwrap()
+}