[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/go.uber.org/multierr/error.go b/vendor/go.uber.org/multierr/error.go
index d4be183..5c9b67d 100644
--- a/vendor/go.uber.org/multierr/error.go
+++ b/vendor/go.uber.org/multierr/error.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Uber Technologies, Inc.
+// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
@@ -54,7 +54,7 @@
//
// errors := multierr.Errors(err)
// if len(errors) > 0 {
-// fmt.Println("The following errors occurred:")
+// fmt.Println("The following errors occurred:", errors)
// }
//
// Advanced Usage
@@ -130,7 +130,7 @@
}
// Errors returns a slice containing zero or more errors that the supplied
-// error is composed of. If the error is nil, the returned slice is empty.
+// error is composed of. If the error is nil, a nil slice is returned.
//
// err := multierr.Append(r.Close(), w.Close())
// errors := multierr.Errors(err)
@@ -397,3 +397,53 @@
errors := [2]error{left, right}
return fromSlice(errors[0:])
}
+
+// AppendInto appends an error into the destination of an error pointer and
+// returns whether the error being appended was non-nil.
+//
+// var err error
+// multierr.AppendInto(&err, r.Close())
+// multierr.AppendInto(&err, w.Close())
+//
+// The above is equivalent to,
+//
+// err := multierr.Append(r.Close(), w.Close())
+//
+// As AppendInto reports whether the provided error was non-nil, it may be
+// used to build a multierr error in a loop more ergonomically. For example:
+//
+// var err error
+// for line := range lines {
+// var item Item
+// if multierr.AppendInto(&err, parse(line, &item)) {
+// continue
+// }
+// items = append(items, item)
+// }
+//
+// Compare this with a verison that relies solely on Append:
+//
+// var err error
+// for line := range lines {
+// var item Item
+// if parseErr := parse(line, &item); parseErr != nil {
+// err = multierr.Append(err, parseErr)
+// continue
+// }
+// items = append(items, item)
+// }
+func AppendInto(into *error, err error) (errored bool) {
+ if into == nil {
+ // We panic if 'into' is nil. This is not documented above
+ // because suggesting that the pointer must be non-nil may
+ // confuse users into thinking that the error that it points
+ // to must be non-nil.
+ panic("misuse of multierr.AppendInto: into pointer must not be nil")
+ }
+
+ if err == nil {
+ return false
+ }
+ *into = Append(*into, err)
+ return true
+}