1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/google.golang.org/protobuf/internal/fieldsort/fieldsort.go b/vendor/google.golang.org/protobuf/internal/fieldsort/fieldsort.go
new file mode 100644
index 000000000..517c4e2a0
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/fieldsort/fieldsort.go
@@ -0,0 +1,40 @@
+// Copyright 2019 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.
+
+// Package fieldsort defines an ordering of fields.
+//
+// The ordering defined by this package matches the historic behavior of the proto
+// package, placing extensions first and oneofs last.
+//
+// There is no guarantee about stability of the wire encoding, and users should not
+// depend on the order defined in this package as it is subject to change without
+// notice.
+package fieldsort
+
+import (
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// Less returns true if field a comes before field j in ordered wire marshal output.
+func Less(a, b protoreflect.FieldDescriptor) bool {
+	ea := a.IsExtension()
+	eb := b.IsExtension()
+	oa := a.ContainingOneof()
+	ob := b.ContainingOneof()
+	switch {
+	case ea != eb:
+		return ea
+	case oa != nil && ob != nil:
+		if oa == ob {
+			return a.Number() < b.Number()
+		}
+		return oa.Index() < ob.Index()
+	case oa != nil && !oa.IsSynthetic():
+		return false
+	case ob != nil && !ob.IsSynthetic():
+		return true
+	default:
+		return a.Number() < b.Number()
+	}
+}