Hi, This does seem to be a bug in is(); I'll take a look. I'm curious about what stopped you from using setOldClass(), since that seems to be the most appropriate solution.
Michael On Tue, May 2, 2023 at 2:59 PM Russell Almond <russ...@ralmond.net> wrote: > > I’m somewhat puzzled by the following bit of code on R 4.2.3 (also R 4.2.2) > > > df <- data.frame(x=1:3) > > is (df,"ANY") > [1] FALSE > > This seem to be false when the first argument is any S3 class, while I would > think that “ANY” would be true for S3, S4 and reference classes, as well as > primitive types. > > This also seems to be a regression, as code that was previously working no > longer works. > > > A little more context on my use. > > I’m defining a slot for a reference class using a type union, > setClass(“MongoDB”,c(“NULL”,”ANY”)) > > [I should be using setOldClass(“mongo”) here, but I was having trouble > promoting the S3 “mongo” class I was getting from the library.] > > Then when I try to set the corresopnding slot I’m getting an error, because > “mongo” is not of type MongoDB (even through that is a class union which > contains “ANY”). > > I can work around the problem by setting the slot to type “ANY”, but then I > loose the documentation that the intention is that it should a mongo database > connection. > > Did I miss something here? Or is this an unintended consequence of some > other change? > > Thanks, > —Russell Almond > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Michael Lawrence Senior Principal Scientist, Director of Data Science and Statistical Computing Genentech, A Member of the Roche Group Office +1 (650) 225-7760 micha...@gene.com Join Genentech on LinkedIn | Twitter | Facebook | Instagram | YouTube ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel