From hb at maths.lth.se  Mon Apr  3 14:08:54 2006
From: hb at maths.lth.se (Henrik Bengtsson)
Date: Mon, 3 Apr 2006 14:08:54 +0200
Subject: [Rd] Substitute() changed since R2.3.0 (2006-02-02 r37243)?
In-Reply-To: <59d7961d0603290225rddfd4a1s5798db4ac91d086c@mail.gmail.com>
References: <59d7961d0603290140y29d0b959w6fd6cc5a5a8dd24b@mail.gmail.com>
	<x27j6dbmid.fsf@viggo.kubism.ku.dk>
	<59d7961d0603290225rddfd4a1s5798db4ac91d086c@mail.gmail.com>
Message-ID: <59d7961d0604030508m5904c588p37a5e9108d25afbb@mail.gmail.com>

Follow up:  I've downloaded todays R v2.3.0 alpha (2006-04-02 r37626)
for Windows and the below bug has been fixed:

> yaa <- function(...) substitute(list(...))
> yaa(foo(x,y,...,z))
list(foo(x, y, ..., z))

Thank you (Duncan!?)

Henrik

On 3/29/06, Henrik Bengtsson <hb at maths.lth.se> wrote:
> On 29 Mar 2006 11:58:34 +0200, Peter Dalgaard <p.dalgaard at biostat.ku.dk> wrote:
> > "Henrik Bengtsson" <hb at maths.lth.se> writes:
> >
> > > Hi,
> > >
> > > I've got the following two versions of R on WinXP:
> > >
> > > A) R Version 2.3.0 Under development (unstable) (2006-02-02 r37243)
> > > B) R Version 2.3.0 Under development (unstable) (2006-03-27 r37579)
> > >
> > > and a the following "test.R" script:
> > >
> > > foo <- function(path, ...) { print(path) }
> > > bar <- function(x, ...) foo(...)
> > > wow <- function(x, ...) capture.output(foo(...))
> > > bar(1, path=2)
> > > print(wow(1, path=2))
> > >
> > > With A, I get:
> > >
> > > > source("test.R")
> > > [1] 2
> > > [1] "[1] 2"
> > >
> > > But with B, I get
> > > > source("test.R")
> > > [1] 2
> > > Error in print(path) : argument "path" is missing, with no default
> > >
> > > Further debugging led me to the following test2.R script:
> > >
> > > foo <- function(path, ...) { print(path) }
> > > bar <- function(x, ...) foo(...)
> > > wow <- function(x, ...) yaa(foo(...))
> > > yaa <- function(...) substitute(list(...))
> > > bar(1, path=2)
> > > print(wow(1, path=2))
> > >
> > > With A, I get
> > >
> > > > source("test2.R")
> > > [1] 2
> > > list(foo(...))
> > >
> > > But with B, I get
> > >
> > > > source("test.R")
> > > [1] 2
> > > list(foo())
> > >
> > > Note that '...' is missing in the latest version.  I don't think this is wanted.
> >
> > I suspect that you're right. Just for reproduction purposes: The
> > script is not needed, and the whole thing simplifies to the two lines:
> >
> > yaa <- function(...) substitute(list(...))
> > yaa(foo(...))
> >
> > which gives list(foo()) in 2.3.0 alpha and used to give list(foo(...)).
>
> And, yaa(foo(x,y,...,z)) gives list(foo(x, y, z)) but used to give
> list(foo(x, y, ..., z)).
>
> /Henrik
>
> >
> > --
> >    O__  ---- Peter Dalgaard             ?ster Farimagsgade 5, Entr.B
> >   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
> >  (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
> > ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907
> >



[Rd] Substitute() changed since R2.3.0 (2006-02-02 r37243)?
Henrik Bengtsson