g-type-from-instance (instance)

instance -- a valid g-type-instance instance

The g-type ID of instance.

Get the type identifier from a given instance. This function should only be used in type implementations. Signals an error if the instance argument is not a valid g-type-instance instance.

(g-type-from-instance (make-instance 'gtk-button))
=> #<GTYPE :name "GtkButton" :id 134914152>