From 69dd62dfd60631ba69201d8a197fde1ece4b4df3 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Mon, 8 Jul 2013 16:14:21 +0200
Subject: qapi: Anonymous unions

The discriminator for anonymous unions is the data type. This allows to
have a union type that allows both of these:

    { 'file': 'my_existing_block_device_id' }
    { 'file': { 'filename': '/tmp/mydisk.qcow2', 'read-only': true } }

Unions like this are specified in the schema with an empty dict as
discriminator. For this example you could take:

    { 'union': 'BlockRef',
      'discriminator': {},
      'data': { 'definition': 'BlockOptions',
                'reference': 'str' } }
    { 'type': 'ExampleObject',
      'data: { 'file': 'BlockRef' } }

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 include/qapi/qmp/qobject.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/qapi/qmp')

diff --git a/include/qapi/qmp/qobject.h b/include/qapi/qmp/qobject.h
index 9124649ed2..d0bbc7c4a6 100644
--- a/include/qapi/qmp/qobject.h
+++ b/include/qapi/qmp/qobject.h
@@ -44,6 +44,7 @@ typedef enum {
     QTYPE_QFLOAT,
     QTYPE_QBOOL,
     QTYPE_QERROR,
+    QTYPE_MAX,
 } qtype_code;
 
 struct QObject;
-- 
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