[Rd] defer removal of ENCLOS, FRAME, HASHTAB, SET_ENCLOS

[Laurent Gautier]

Thanks Simon. This is really helpful.

I did not find what is the replacement for SET_ENCLOS. The documentation
shows how to create a new environment with a given parent environment but
not how to reparent an existing environment (which SET_ENCLOS did).

On Sun, Mar 22, 2026 at 5:00 PM Simon Urbanek <simon.urbanek using r-project.org>
wrote:

> Laurent,
>
> see R-exts 6.22 [1] in particular subsections 1 and 2. As for FRAME you
> use the accessor functions instead of accessing it directly.
>
> Cheers,
> Simon
>
> [1] -
> https://cran.r-project.org/doc/manuals/r-devel/R-exts.html#Moving-into-C-API-compliance
>
>
> > On 22 Mar 2026, at 12:00, Laurent Gautier <lgautier using gmail.com> wrote:
> >
> > Hi,
> >
> > I'd like to second that request. rpy2, a Python-R bridge, also
> > uses ENCLOS / SET_ENCLOS and to a lesser extent FRAME.
> >
> > Also, what is the alternative suggested to replace the functionality
> > they offered?
> >
> >
> > Best,
> >
> > Laurent
> >
> >
> >
> > Hi,
> >>
> >> The development version of R removes the symbols
> >>
> >>    ENCLOS, FRAME, HASHTAB, SET_ENCLOS
> >>
> >> as per r89522. Unfortunately, these symbols are used by current
> >> versions of RStudio, and so these versions of RStudio are unable to
> >> launch with the development versions of R. (By extension, they would
> >> also fail to launch using R 4.6.0 when released.)
> >>
> >> On the RStudio side, we can work to adapt to these changes as quickly
> >> as possible, but our experience is that users will often upgrade R
> >> without necessarily upgrading RStudio in tandem.
> >>
> >> I'd like to propose keeping these symbols defined in R for now (even
> >> if not publicly accessible via headers) just to ensure existing
> >> versions of RStudio can continue to function as expected with the
> >> upcoming release of R.
> >>
> >> Thanks,
> >> Kevin
> >>
> >>
> >
> > [[alternative HTML version deleted]]
> >
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> >
>
>

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