define S4 method with 3 dots

dispatch, r, r-s4

Solution

Elaborating on the comment of @hadley the signature should be for your class, and the definition should follow `getGeneric`. Hence

> getGeneric("c")
standardGeneric for "c" defined from package "base"

function (x, ..., recursive = FALSE)
standardGeneric("c", .Primitive("c"))
<environment: 0x4956ab8>
Methods may be defined for arguments: x, recursive
Use  showMethods("c")  for currently available ones.

so

setClass("A", representation(x="numeric"))
setMethod("c", "A", function(x, ..., recursive=FALSE) {
  "here I am"
})

and

> c(new("A"), new("A"))
[1] "here I am"

Problem

I am trying to define the "c" method for an object I created. something like ``` setMethod("c", signature(...), definition=function (...) { myObject = list(...)[[1]] myObject@mySlot=lapply(list(...), FUN = function(x) slot(x, "mySlot")) return(myObject) } ) ``` The problem is that I cannot define the class of ... so that the dispatching is done properly. Any idea?

Original source