seq.int(which dispatches methods for
is.nameis a synonym for
is.symboland dispatches methods for the latter. Similarly,
as.numericis a synonym for
as.doubleand dispatches methods for the latter, i.e., S3 methods are for
as.double, whereas S4 methods are to be written for
as.numeric. Note that all of the group generic functions are also internal/primitive and allow methods to be written for them.
.S3PrimitiveGenericsis a character vector listing the primitives which are internal generic and not group generic. Currently
unlistare the internal non-primitive functions which are internally generic. For efficiency, internal dispatch only occurs on objects, that is those for which
methodsfor the methods which are available.