Sounds good. Using xlengthgets is the way to go for your package, and most others. I think I posted an outline on how I would do that a few months ago. The resizable framework is mainly for data.table, who seem convinced that they need it.
Best, luke On Thu, 4 Dec 2025, Merlise Clyde, Ph.D. wrote:
Dear Luke, I have implemented changes knowing this was around the corner to address this and hopefully can finalize unit tests/comparisons in the next week (I also want to take a look at the new resizable option to see how that compares to what I did), but it looks like CRAN will be down for submissions from Dec 23 through Jan 7. Hoping the grace period takes into account this down time in case early submissions fail on some of the CRAN machines despite all efforts to test ahead of time. Best, Merlise From: [email protected] <[email protected]> Date: Wednesday, December 3, 2025 at 8:47 PM To: [email protected] <[email protected]> Subject: non-API SETLENGTH and friends will be dropped soon As part of clarifying and tightening the R API for packages the non-API entry points SETLENGTH, TRUELENGTH, SET_TRUELENGTH, and SET_GROWABLE_BIT will be removed from installed header files and, where possible, hidden from package access. The first step will be to turn current check NOTEs into WARNINGs; this will hopefully happen in the next few weeks. Hopefully the process can be completed by early January. 17 CRAN/BIOC packages currently make use of one or more of these entry points. Most using SETLENGTH should transition to using xgetlength(), which allocates a new vector, usually with a shorter length. There is a small amount of overhead, and care is needed to protect the new result, but this is a much safer option. R-devel does now include an experimental API for creating resizable vectors, but it needs a great deal of care to use safely. These options are described in a new section "Resizing vectors" in the Writing R Extensions manual. [If you are a maintainer of one of the 17 affected packages you should receive a separate copy of this note.] Best, luke ~ -- 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.u/ iowa.edu%2F&data=05%7C02%7Cclyde%40duke.edu%7Cba7580378f9541643d8308de32d7 0ce1%7Ccb72c54e4a314d9eb14a1ea36dfac94c%7C0%7C0%7C639004096389160865%7CUnk nown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4 zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ixyactGTcKZWRkHyy IAnIf0jV5u8OK2vPywlWRhNkfE%3D&reserved=0
-- 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/ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
