encoding/xml: document that embedded interfaces look like non-embedded ones

Fixes #69941

Change-Id: Icc3c88d57c14fa9ca203c693d67f144686fed8cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/621076
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

diff --git a/src/encoding/xml/marshal.go b/src/encoding/xml/marshal.go
index 05b5542dfb41626b77974b902aadc584d17f7b4d..133503fa2de41c4b64a8077e9651b3facc11fc4c 100644 (file)
--- a/src/encoding/xml/marshal.go
+++ b/src/encoding/xml/marshal.go
@@ -62,6 +62,8 @@ const (
 //     string of length zero.
 //   - an anonymous struct field is handled as if the fields of its
 //     value were part of the outer struct.
+//   - an anonymous struct field of interface type is treated the same as having
+//     that type as its name, rather than being anonymous.
 //   - a field implementing [Marshaler] is written by calling its MarshalXML
 //     method.
 //   - a field implementing [encoding.TextMarshaler] is written by encoding the