[Rd] Context problem with ... and rbind (PR#860)

[Peter Dalgaard BSA]

ripley@stats.ox.ac.uk writes:

> f <- function(x, ...)
> {
>    g <- function(x, ...) x
>    rbind(numeric(), g(x, ...))
> }
> > f(1:3)
> Error in rbind(numeric(), g(x, ...)) : ... used in an incorrect context

It's not really rbind that is the culprit here, but the deparsing of
its argument. A near-minimal version of what I think is the same issue
is

f <- function(x, ...) h(g(x, ...))
g <- function(x, ...) x
h <- function(...)substitute(list(...))
f(1)
#Error in h(g(x, ...)) : ... used in an incorrect context

Also, the following is perplexing, given the definition of quote():

> quote(list(...))
list(...)
> substitute(list(...))
Error: ... used in an incorrect context

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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