From hb@maths.lth.se  Tue Feb 19 00:22:59 2002
From: hb@maths.lth.se (hb@maths.lth.se)
Date: Tue, 19 Feb 2002 01:22:59 +0100 (MET)
Subject: [Rd] library(methods): setMethod with "ANY" fails. (PR#1317)
Message-ID: <200202190022.BAA05385@pubhealth.ku.dk>

Full_Name: Henrik Bengtsson
Version: R v1.4.1
OS: WinMe
Submission from: (NULL) (217.208.14.137)


Doing the following

library(methods)
setGeneric("foo", function(x) standardGeneric("foo"))
setMethod("foo", "ANY", function(x) cat(x))

fails with

Error in while (value[n] == "ANY") n <- n - 1 : 
        missing value where logical needed

It looks like the line

  while (value[n] == "ANY") n <- n - 1

in the source for matchSignature() should be

  while (n > 0 && value[n] == "ANY") n <- n - 1


FYI: I tried my suggested modification at it seems to work.


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[Rd] library(methods): setMethod with "ANY" fails. (PR#1317)
hb@maths.lth.se