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qapi: Introduce a first class 'null' type

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I expect the 'null' type to be useful mostly for members of alternate
types.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2017-06-26 19:25:14 +02:00
parent d2f95f4d48
commit 4d2d5c41a9
8 changed files with 31 additions and 8 deletions
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4
include/qapi/qmp/qobject.h
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@ -93,9 +93,9 @@ static inline QType qobject_type(const QObject *obj)
return obj->type;
}
typedef struct QNull {
struct QNull {
QObject base;
} QNull;
};
extern QNull qnull_;

1
include/qemu/typedefs.h
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@ -89,6 +89,7 @@ typedef struct QEMUSGList QEMUSGList;
typedef struct QEMUTimer QEMUTimer;
typedef struct QEMUTimerListGroup QEMUTimerListGroup;
typedef struct QObject QObject;
typedef struct QNull QNull;
typedef struct RAMBlock RAMBlock;
typedef struct Range Range;
typedef struct SerialState SerialState;