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Tim, What you're describing is a special case of the ALTREP framework/API that Luke Tierney, Tomas Kalibera, and I are working on putting into R. See my initial proposal to the DSC here: https://www.r-project.org/dsc/2016/slides/customvectors.html and the subsequent branch here: https://svn.r-project.org/R/branches/ALTREP/ where Luke and I have merged the ideas from that proposal with work he had been pursuing independently. The framework is implemented and passes basic testing (make check all minus the internet checks, from what I re...

http://www.keittlab.org/ On Wed, Mar 29, 2017 at 1:04 PM, Herv? Pag?s <hpages at fredhutch.org> wrote: > Hi Tim, > > On 03/29/2017 08:24 AM, Tim Keitt wrote: > >> I have a use case where I would like to create an SEXP around an existing >> buffer that is managed by R, thus avoiding a copy operation. >> > > What to you mean exactly by "an existing

I can't comment for Da, but one example where the ability to make 'if' generic would have been desirable: A couple of years ago I wrote S3 classes and methods for 1-byte integers and logicals stored as raw vectors, in order to handle massive amounts of genetic data (by the standards of the day). Everything worked pretty nicely, ie I could "methodize" just about everything I