Re: [Qemu-devel] [PATCH] qom: add object_property_is_set

[Paolo Bonzini]

Il 18/02/2014 17:46, Marcel Apfelbaum ha scritto:
> Sometimes is not enough to get property's value,
> but it is needed to know if the value was actually set.
>
> This is especially useful when querying bool properties
> and having different defaults on different scenarios.

I think this needs to go together with the use, so that I can understand 
what exactly you need.

Is it because the bool property is "bool *" and thus cannot be set to 
(for example) -1 to indicate the default value?

Paolo