Am So., 7. Feb. 2021 um 09:35 Uhr schrieb Manfred Bergmann < manfred.bergm...@me.com>:
> > Am 07.02.2021 um 09:23 schrieb Hans Hübner <hans.hueb...@gmail.com>: > > > > Am So., 7. Feb. 2021 um 09:20 Uhr schrieb Manfred Bergmann < > manfred.bergm...@me.com>: > > But fundamentally, you also can’t create an instance of a class in > Common Lisp from just the symbol. The class definition must be known. > > > > This simply is untrue. You can use FIND-CLASS to find a class named by > a symbol and then instantiate it. > > Well, OK. Sure. But when I do that I have again a dependency on the > concrete class, or? And it would be similar as knowing the class right from > the start. > You don't. You have a dependency on the name of a class. The name could refer to two entirely different classes between invocations of FIND-CLASS. The name could also come from an external source. Thus, this is purely a run-time dependency and it would be quite possible that FIND-CLASS returns NIL if given a symbol that does not designate a currently-defined class.
