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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>
65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
/*
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* Core Definitions for QAPI Visitor Classes
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#ifndef QAPI_VISITOR_CORE_H
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#define QAPI_VISITOR_CORE_H
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#include "qapi/qmp/qobject.h"
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#include "qapi/error.h"
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#include <stdlib.h>
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typedef struct GenericList
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{
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union {
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void *value;
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uint64_t padding;
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};
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struct GenericList *next;
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} GenericList;
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typedef struct Visitor Visitor;
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void visit_start_handle(Visitor *v, void **obj, const char *kind,
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const char *name, Error **errp);
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void visit_end_handle(Visitor *v, Error **errp);
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void visit_start_struct(Visitor *v, void **obj, const char *kind,
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const char *name, size_t size, Error **errp);
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void visit_end_struct(Visitor *v, Error **errp);
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void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
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Error **errp);
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void visit_end_implicit_struct(Visitor *v, Error **errp);
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void visit_start_list(Visitor *v, const char *name, Error **errp);
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GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp);
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void visit_end_list(Visitor *v, Error **errp);
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void visit_start_optional(Visitor *v, bool *present, const char *name,
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Error **errp);
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void visit_end_optional(Visitor *v, Error **errp);
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void visit_get_next_type(Visitor *v, int *obj, const int *qtypes,
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const char *name, Error **errp);
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void visit_type_enum(Visitor *v, int *obj, const char *strings[],
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const char *kind, const char *name, Error **errp);
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void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp);
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void visit_type_uint8(Visitor *v, uint8_t *obj, const char *name, Error **errp);
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void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, Error **errp);
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void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, Error **errp);
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void visit_type_uint64(Visitor *v, uint64_t *obj, const char *name, Error **errp);
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void visit_type_int8(Visitor *v, int8_t *obj, const char *name, Error **errp);
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void visit_type_int16(Visitor *v, int16_t *obj, const char *name, Error **errp);
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void visit_type_int32(Visitor *v, int32_t *obj, const char *name, Error **errp);
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void visit_type_int64(Visitor *v, int64_t *obj, const char *name, Error **errp);
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void visit_type_size(Visitor *v, uint64_t *obj, const char *name, Error **errp);
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void visit_type_bool(Visitor *v, bool *obj, const char *name, Error **errp);
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void visit_type_str(Visitor *v, char **obj, const char *name, Error **errp);
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void visit_type_number(Visitor *v, double *obj, const char *name, Error **errp);
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#endif
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