docs/devel/qapi-code-gen: Extend example for next commit's change

The next commit will change the code generated for some optional
members.  The example schema contains an optional member affected by
the change.  Add one that is not affected.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-4-armbru@redhat.com>

docs/devel/qapi-code-gen.rst

@@ -1357,7 +1357,7 @@ qmp_my_command(); everything else is produced by the generator. ::
 
     $ cat example-schema.json
     { 'struct': 'UserDefOne',
-      'data': { 'integer': 'int', '*string': 'str' } }
+      'data': { 'integer': 'int', '*string': 'str', '*flag': 'bool' } }
 
     { 'command': 'my-command',
       'data': { 'arg1': ['UserDefOne'] },
@@ -1412,6 +1412,8 @@ Example::
         int64_t integer;
         bool has_string;
         char *string;
+        bool has_flag;
+        bool flag;
     };
 
     void qapi_free_UserDefOne(UserDefOne *obj);
@@ -1531,6 +1533,11 @@ Example::
                 return false;
             }
         }
+        if (visit_optional(v, "flag", &obj->has_flag)) {
+            if (!visit_type_bool(v, "flag", &obj->flag, errp)) {
+                return false;
+            }
+        }
         return true;
     }
 
@@ -1916,6 +1923,12 @@ Example::
                     { "type", QLIT_QSTR("str"), },
                     {}
                 })),
+                QLIT_QDICT(((QLitDictEntry[]) {
+                    { "default", QLIT_QNULL, },
+                    { "name", QLIT_QSTR("flag"), },
+                    { "type", QLIT_QSTR("bool"), },
+                    {}
+                })),
                 {}
             })), },
             { "meta-type", QLIT_QSTR("object"), },
@@ -1949,6 +1962,12 @@ Example::
             { "name", QLIT_QSTR("str"), },
             {}
         })),
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "json-type", QLIT_QSTR("boolean"), },
+            { "meta-type", QLIT_QSTR("builtin"), },
+            { "name", QLIT_QSTR("bool"), },
+            {}
+        })),
         {}
     }));