Our starting point was that in ObjC at the beginning of the execution, the root meta-class (most of the time NSObject) instantiates all the other meta-classes, that create the class as object for the software. In Swift is it the same? If so, which is the name of the root meta-class? Thanks for the fast reply.
Giacomo > On 9 May 2017, at 00:30, John McCall <rjmcc...@apple.com> wrote: > >> On May 8, 2017, at 6:21 PM, Giacomo Leopizzi via swift-dev >> <swift-dev@swift.org> wrote: >> Hello everyone! >> I was discussing with a friend about metaclasses in Objective-C. In Obj-C >> the root meta-class was the NSObject's one. > > ObjC does not have a single root class. Most ObjC classes inherit from > NSObject, but that is not guaranteed, and in fact there are other common root > classes including NSProxy. > >> When in a swift class you create a subclass of NSObject, the root metaclass >> should be the same. What happen when you delcare a class without NSObject >> dependence? There is an hidden root-class? Where can we read more about this >> topic? > > When ObjC interop is enabled, Swift classes that do not inherit from NSObject > use a private root class. However, that is a private implementation detail > and we don't promise much about it. > > Do you have any specific questions? > > John. _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
