[R] Suggestion for implementation

[Luke Tierney]

In 1.4 or later have a look at ?lockBinding:

> x <- 5
> lockBinding("x",.GlobalEnv)
NULL
Warning message: 
saved workspaces with locked bindings may not work properly when loaded into older versions of R 
> x <- 8
Error: can't change value of a locked binding

The facility and the interface are still experimental, so details may
change.

luke

On Sun, Apr 14, 2002 at 08:00:59PM +0200, Christoph Lange wrote:
> 
> I wonder if it was possible (and desireable) to implement means to
> protect data objects (and functions) from overwriting them. So for
> instance:
> 
> > x <- 5
> > protect(x)
> > x <- 8
> Error: x is read only
> 
> 
> Or would that be against the philosophy of R to be compatible to S?!
> 
> Just a RFC ;-)
> 
>   Yours,
>     Christoph.
> 
> ps. Your probably know the situations that let you think of such a
> feature :-( ...
> 
> -- 
> Christoph Lange                                    clange at epost.de
> Verhaltensbiologie, FU Berlin                            838-55068
> Haderslebener Str. 9, 12163 Berlin
> http://www.verhaltensbiologie.fu-berlin.de/
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-- 
Luke Tierney
University of Minnesota                      Phone:           612-625-7843
School of Statistics                         Fax:             612-624-8868
313 Ford Hall, 224 Church St. S.E.           email:      luke at stat.umn.edu
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