[Rd] formals assignment now strips attributres

[Peter Dalgaard]

Patrick Burns <pburns at pburns.seanet.com> writes:

> Peter Dalgaard wrote:
...
> >>fjj <- function() x
> >>formals(fjj) <- list(x=quote(c(a=2, b=4)))
> >>fjj()
> >>
> >a b
> >2 4
> >
> >>fix(fjj)
> >>fjj()
> >>
> >a b
> >2 4
> >
> 
> But the point of using 'formals' in the first place is to get a
> function that is self-contained.  The real application is more
> like:
> 
> formals(fjj) <- list(x = an_object)
> 
> I want 'fjj' to work even when 'an_object' is nowhere to be
> found.
> 
> 'formals' worked as (I) expected in versions 1.8.0
> through 1.9.1 at least. Pat

It didn't change. It's the editing that is doing you in. There have
been changes to deparse, and they seem to have introduced a bug, but
a function object created in that way is fundamentally uneditable.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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