[Rd] setClass accepts slot-mismatch between slots and prototype arguments
brodie@g@@l@m @ending from y@hoo@com
Thu Jan 10 17:57:35 CET 2019
Indeed that was on oversight on my part. It is surprising that things like this work:
> setClass('test', slots=c(a='ANY'), prototype=list(a=NULL, b='hello'))
I'm planning a release of diffobj right now so I will fix this, but I agree that R should probably throw an error here.
On Thursday, January 10, 2019, 11:30:13 AM EST, William Dunlap <wdunlap using tibco.com> wrote:
I was installing the 'diffobj' package into TERR and got an error from the call
StyleSummary <- setClass("StyleSummary",
slots=c(container="ANY", body="ANY", map="ANY"),
container=function(x) sprintf("\n%s\n", paste0(x, collapse="")),
detail=function(x) sprintf("\n%s\n", paste0(" ", x, collapse="")),
map=function(x) sprintf("\n%s", paste0(" ", x, collapse="\n"))
because the prototype contained components not in the slots list. R does not complain about the mismatch, but new("StyleSummary") does name make something with a 'detail' slot. Should this be an error?
I suspect that the package writer intended to include 'detail' in the slots argument.
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