LibertyXDR: add support for default in unions

2025-05-07 19:42:46 +02:00
parent 9a26284a64
commit b69d3f8692
3 changed files with 30 additions and 7 deletions
--- a/libertyxdr.adoc
+++ b/libertyxdr.adoc
@@ -93,10 +93,12 @@ and always-present field, which must be a tag *enum*:
 case CAR:   void;
 case LORRY: i8 axles;
 case PLANE: i8 engines;
+ default:    void;
 };

-All possible enumeration values must be named, and there is no *case*
-fall-through.
+There is no *case* fall-through.
+Unless *default* is present, only the listed enumeration values are valid.
+Any *default* must currently be empty.

 Framing
 -------