qapi: Eliminate QCO_NO_OPTIONS for a slight simplification

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-Id: <20211028102520.747396-4-armbru@redhat.com>

include/qapi/qmp/dispatch.h

@@ -21,7 +21,6 @@ typedef void (QmpCommandFunc)(QDict *, QObject **, Error **);
 
 typedef enum QmpCommandOptions
 {
-    QCO_NO_OPTIONS            =  0x0,
     QCO_NO_SUCCESS_RESP       =  (1U << 0),
     QCO_ALLOW_OOB             =  (1U << 1),
     QCO_ALLOW_PRECONFIG       =  (1U << 2),

monitor/misc.c

@@ -230,8 +230,7 @@ static void monitor_init_qmp_commands(void)
 
     qmp_init_marshal(&qmp_commands);
 
-    qmp_register_command(&qmp_commands, "device_add", qmp_device_add,
-                         QCO_NO_OPTIONS);
+    qmp_register_command(&qmp_commands, "device_add", qmp_device_add, 0);
 
     QTAILQ_INIT(&qmp_cap_negotiation_commands);
     qmp_register_command(&qmp_cap_negotiation_commands, "qmp_capabilities",

scripts/qapi/commands.py

@@ -229,15 +229,12 @@ def gen_register_command(name: str,
     if coroutine:
         options += ['QCO_COROUTINE']
 
-    if not options:
-        options = ['QCO_NO_OPTIONS']
-
     ret = mcgen('''
     qmp_register_command(cmds, "%(name)s",
                          qmp_marshal_%(c_name)s, %(opts)s);
 ''',
                 name=name, c_name=c_name(name),
-                opts=" | ".join(options))
+                opts=' | '.join(options) or 0)
     return ret