search for: alterp

Benjamin, You happened to send a link which points to the OP's own package :) I think Jiefei would like to know how one can "officially" determine if an arbitrary ALTERP object belongs to a class that he owns. Regards, Denes On 10/19/20 10:22 AM, Benjamin Christoffersen wrote: > It seems as if you can you use the ALTREP macro as done in this > package: https://github.com/Jiefei-Wang/SharedObject/blob/804b6ac58c63a4bae95343ab43e8b1547b07ee6b/src/C_interface...

...Jiefei On Mon, Oct 19, 2020 at 5:38 PM Benjamin Christoffersen <boennecd at gmail.com> wrote: > > You happened to send a link which points to the OP's own package :) I > > think Jiefei would like to know how one can "officially" determine if an > > arbitrary ALTERP object belongs to a class that he owns. > Argh, I am sorry! I did not notice that. My best bet for what I > thought the question was is section 1.1.2 of R Internals where they > note that: `unsigned int alt : 1; /* is this an ALTREP object? */` > > This is also what the ALTREP macro...

> You happened to send a link which points to the OP's own package :) I > think Jiefei would like to know how one can "officially" determine if an > arbitrary ALTERP object belongs to a class that he owns. Argh, I am sorry! I did not notice that. My best bet for what I thought the question was is section 1.1.2 of R Internals where they note that: `unsigned int alt : 1; /* is this an ALTREP object? */` This is also what the ALTREP macro checks. However, I also...

Hi all, I would like to determine if an ALTREP object is from my package, I see there is a function `ALTREP_CLASS` defined in RInternal.h but its return value is neither a `R_altrep_class_t` object nor an STRSXP representing a class name. I do not know how to correctly use it. Any suggestions? Thanks, Jiefei [[alternative HTML version deleted]]