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

**Peter Dalgaard BSA
**
p.dalgaard@pubhealth.ku.dk

*04 Mar 2001 12:56:35 +0100*

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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