I'm rather puzzled by this behavior:

e
export("caption<-", "caption", "label", "label<-", "align<-",
    "align", "digits<-", "digits", "display<-", "display", "xtable",
    "print.xtable", "toLatex.xtable")
> e[[1L]]
e[[1L]]
export
> e[-1L]
e[-1L]
"caption<-"("caption", "label", "label<-", "align<-", "align",
"digits<-", "digits", "display<-", "display", "xtable", "print.xtable",
    "toLatex.xtable")

I'm not at all clear what should result from removing the first element, i.e. the 'export', but I would not expect the first argument to be promoted into the function position. I guess I would expect a coercion to list or pairlist first, after which the [-1L] would produce a meaningful result on that coercion. In any event I do observe that as.character(e[-1L]) produces the expected result:

as.character(e[-1L])
 [1] "caption<-"      "caption"        "label" "label<-"
 [5] "align<-"        "align"          "digits<-" "digits"
 [9] "display<-"      "display"        "xtable" "print.xtable"
[13] "toLatex.xtable"

This code is from parseNamespaceFile (on the xtable package).

Mick Jordan

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