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myclassaornull
2010 Jul 21
1
Bug: broken exception handling in S4 methods
...(c(1,2)) })
## OK (error in constructor)
er = try({ MyClassA(c(1,2)) })
## OK (error evaluating argument to a function)
er = try({ sin(MyClassA(c(1,2))) })
# Now consider we define MyClassB that has MyClassA in a slot
# and we define a constructor that takes such objects:
setClassUnion("MyClassAOrNULL", c("MyClassA", "NULL"))
setClass("MyClassB",
representation(
ca = "MyClassAOrNULL"
),
prototype(ca = NULL)
)
setGeneric("MyClassB", function(x) standardGeneric("MyClassB"))
setMethod("MyClassB",...