qapi: Add visitor for implicit structs

These can be used when an embedded struct is parsed and members not
belonging to the struct may be present in the input (e.g. parsing a
flat namespace QMP union, where fields from both the base and one
of the alternative types are mixed in the JSON object)

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index 5159964..5c1297f 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -22,6 +22,10 @@ struct Visitor
                          const char *name, size_t size, Error **errp);
     void (*end_struct)(Visitor *v, Error **errp);
 
+    void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
+                                  Error **errp);
+    void (*end_implicit_struct)(Visitor *v, Error **errp);
+
     void (*start_list)(Visitor *v, const char *name, Error **errp);
     GenericList *(*next_list)(Visitor *v, GenericList **list, Error **errp);
     void (*end_list)(Visitor *v, Error **errp);
diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h
index 28c21d8..bd24f85 100644
--- a/include/qapi/visitor.h
+++ b/include/qapi/visitor.h
@@ -33,6 +33,9 @@ void visit_end_handle(Visitor *v, Error **errp);
 void visit_start_struct(Visitor *v, void **obj, const char *kind,
                         const char *name, size_t size, Error **errp);
 void visit_end_struct(Visitor *v, Error **errp);
+void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
+                                 Error **errp);
+void visit_end_implicit_struct(Visitor *v, Error **errp);
 void visit_start_list(Visitor *v, const char *name, Error **errp);
 GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp);
 void visit_end_list(Visitor *v, Error **errp);