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>

1 files changed, 15 insertions, 0 deletions

diff --git a/scripts/qapi.py b/scripts/qapi.py
index 3a54c7fc7c..38c808e256 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -17,6 +17,21 @@ builtin_types = [
     'uint8', 'uint16', 'uint32', 'uint64'
 ]
 
+builtin_type_qtypes = {
+    'str':      'QTYPE_QSTRING',
+    'int':      'QTYPE_QINT',
+    'number':   'QTYPE_QFLOAT',
+    'bool':     'QTYPE_QBOOL',
+    'int8':     'QTYPE_QINT',
+    'int16':    'QTYPE_QINT',
+    'int32':    'QTYPE_QINT',
+    'int64':    'QTYPE_QINT',
+    'uint8':    'QTYPE_QINT',
+    'uint16':   'QTYPE_QINT',
+    'uint32':   'QTYPE_QINT',
+    'uint64':   'QTYPE_QINT',
+}
+
 def tokenize(data):
     while len(data):
         ch = data[0]