R help - Aug 2008 - stopifnot message mutation

Dear R-users,

Could someone please explain why the message printed by function stopifnot2, see
below, is different from that of stopifnot itself?

Thank you for your help,
Vadim

> stopifnot2 <- function(...) stopifnot(...)
> stopifnot(F)
Error: F is not TRUE
> stopifnot2(F)
Error: ..1 is not TRUE
> version
               _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          6.1
year           2007
month          11
day            26
svn rev        43537
language       R
version.string R version 2.6.1 (2007-11-26)

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On Fri, 15 Aug 2008, Vadim Organovich wrote:
> Dear R-users,
>
> Could someone please explain why the message printed by function
stopifnot2, see below, is different from that of stopifnot itself?

Refer to the source

 	page(stopifnot,'print')

Then consider this:
> foo <- function(...) match.call()
> foo2 <- function(...) foo(...)
> foo(a+b)[[2]]
a + b
> foo2(a+b)[[2]]
..1
>

HTH,

Chuck

>
> Thank you for your help,
> Vadim
>
>
>> stopifnot2 <- function(...) stopifnot(...)
>> stopifnot(F)
> Error: F is not TRUE
>> stopifnot2(F)
> Error: ..1 is not TRUE
>
>> version
>               _
> platform       i386-pc-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status
> major          2
> minor          6.1
> year           2007
> month          11
> day            26
> svn rev        43537
> language       R
> version.string R version 2.6.1 (2007-11-26)
>
> Note: This email is for the confidential use of the named addressee(s) only
and may contain proprietary, confidential or privileged information. If you are
not the intended recipient, you are hereby notified that any review,
dissemination or copying of this email is strictly prohibited, and to please
notify the sender immediately and destroy this email and any attachments.  Email
transmission cannot be guaranteed to be secure or error-free.  Jump Trading,
therefore, does not make any guarantees as to the completeness or accuracy of
this email or any attachments.  This email is for informational purposes only
and does not constitute a recommendation, offer, request or solicitation of any
kind to buy, sell, subscribe, redeem or perform any type of transaction of a
financial product.
>
> ______________________________________________
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                                             Dept of Family/Preventive Medicine
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