reflect/protoreflect: ExtensionRangeOptions never returns nil
Documentation only change.
Change-Id: Ib620efc99bdaab90eeb5404554ae442f345d6f47
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/221560
Reviewed-by: Joe Tsai <joetsai@google.com>
diff --git a/reflect/protoreflect/type.go b/reflect/protoreflect/type.go
index 797aa18..41d560e 100644
--- a/reflect/protoreflect/type.go
+++ b/reflect/protoreflect/type.go
@@ -212,11 +212,12 @@
// ExtensionRanges is the field ranges used for extension fields.
// In Proto3, it is always an empty ranges.
ExtensionRanges() FieldRanges
- // ExtensionRangeOptions returns the ith extension range options,
- // which is a google.protobuf.ExtensionRangeOptions protobuf message.
- // The caller must not modify the returned message.
+ // ExtensionRangeOptions returns the ith extension range options.
//
- // This method may return a nil interface value if no options are present.
+ // To avoid a dependency cycle, this method returns a proto.Message value,
+ // which always contains a google.protobuf.ExtensionRangeOptions message.
+ // This method returns a typed nil-pointer if no options are present.
+ // The caller must import the descriptorpb package to use this.
ExtensionRangeOptions(i int) ProtoMessage
// Enums is a list of nested enum declarations.
