Emre,
inherits() was designed for S3 classes and at C level only ever works for S3
classes.
In S4 world you should use is().
There is no equivalent C-level API for is() so, unfortunately, you likely have
to use Rf_eval() of is(x, "class").
At low-level there is R_S4_extends() which allows you
Hi,
Suppose I have the following two classes in R:
setClass("Person", representation(name = "character", age = "numeric"))
setClass("Employee", representation(boss = "Person"), contains = "Person")
I can successfully check inheritance in base R:
employee <- new("Employee", name = "Jack", age
