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
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