[Rd] mysteriously persistent generic definition

[Ross Boylan]

R 2.8.1 on Windows behaves as I expected, i.e., the final args(foo)
returns a function of x.  The previous example (below) was on Debian
GNU/Linux.


On Wed, 2009-10-28 at 12:14 -0700, Ross Boylan wrote:
> Here's a self-contained example of the problem:
> 
> > foo <- function(obj) {return(3);}
> > setGeneric("foo")
> [1] "foo"
> > removeGeneric("foo")
> [1] TRUE
> > foo <- function(x) {return(4);}
> > args(foo)
> function (x) 
> NULL
> > setGeneric("foo")
> [1] "foo"
> > args(foo)
> function (obj) 
> NULL
> 
> R 2.7.1.  I get the same behavior whether or not I use ESS.
> 
> The reason this is more than a theoretical problem:
> 
> > setMethod("foo", signature(x="numeric"), function(x) {return(x+4);})
> Error in match.call(fun, fcall) : unused argument(s) (x = "numeric")
> 
> Ross 
>