On 11/6/25 06:54, Iris Simmons wrote:
That is not quite right. Rf_lazy_duplicate was never in the API.
I wish you wouldn't be contrarian just for the sake of it, and I wish
you'd at least be correct when you are. I never said Rf_lazy_duplicate
was part of the API. I said it was placed on the list of non-API C
functions, which is true.
https://github.com/wch/r-source/commit/42b67e1c9bd29506d5e1de8c50389cb4ad39f74a#diff-85fcd7ad89c2b2a608f20c34b99001203b2bc8d2f41c5aedef8239a4e4e98590R697
Right, you didn't write that you thought Rf_lazy_duplicate was part of
the API. And you got a very polite response, perhaps something worth
taking an inspiration from. It was polite because it assumed your
question made sense - it would only have made sense if you thought
Rf_lazy_duplicate was in the API (and you didn't write otherwise). It is
unreasonable to expect WRE would discuss replacements for private
functions for the R engine (after all, before Luke's work on indexing
the API, functions mentioned in WRE were part of the API by the virtue
of being mentioned there). Discussing functions private to the R engine
is out of scope of WRE (or R-pkg-devel for that matter).
Reporting non-API functions used in packages is an important service to
responsible package authors, who want to cooperate in keeping the R
ecosystem maintainable.
Best
Tomas
Using it in a package has been producing a NOTE in R CMD check for a while;
that NOTE has now been upgraded to a WARNING.
3 weeks is not a while.
It has been essentially a no-op since the change to reference counting several
years ago. So Rf_lazy_duplicate(x) is now essentially the same as x.
Thanks.
On Wed, Nov 5, 2025 at 10:37 PM <[email protected]> wrote:
On Thu, 6 Nov 2025, Iris Simmons wrote:
Hi,
I see Rf_lazy_duplicate was placed on the list of non-API C functions.
That is not quite right. Rf_lazy_duplicate was never in the API. Using
it in a package has been producing a NOTE in R CMD check for a while;
that NOTE has now been upgraded to a WARNING.
Is there going to be a replacement, or some alternative? None is
mentioned in Writing R Extensions.
It has been essentially a no-op since the change to reference counting
several years ago. So Rf_lazy_duplicate(x) is now essentially the same
as x.
Best,
luke
Thanks,
Iris
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--
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: [email protected]
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu/
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