hpages at fhcrc.org
2009-Mar-04 03:19 UTC
[Rd] callNextMethod() doesn't pass down arguments
Hi, According to its man page, callNextMethod() (called with no argument) should call the next method "with the arguments to the current method passed down to the next method". But, for the "[[" and "[" generics (primitives), the argument after the dots doesn't seem to be passed down: setClass("A", representation(thing="ANY")) setClass("B", contains="A") setMethod("[[", "A", function(x, i, j, ..., exact=TRUE) return(exact)) setMethod("[[", "B", function(x, i, j, ..., exact=TRUE) callNextMethod())> b <- new("B") > b[[3]][1] TRUE> b[[3, exact=FALSE]][1] TRUE setMethod("[", "A", function(x, i, j, ..., drop=TRUE) return(drop)) setMethod("[", "B", function(x, i, j, ..., drop=TRUE) callNextMethod())> b[3][1] TRUE> b[3, drop=FALSE][1] TRUE I tried this with R 2.8.0 and 2.9.0 (r47727). Cheers, H.