search for: r_altrep_class_t

...de "R_ext/Altrep.h" from a C++ file. I think it needs two changes: 1. add the same __cplusplus check as most of the other header files: #ifdef __cplusplus extern "C" { #endif ... #ifdef __cplusplus } #endif 2. change the line R_new_altrep(R_altrep_class_t class, SEXP data1, SEXP data2); to R_new_altrep(R_altrep_class_t cls, SEXP data1, SEXP data2); since C++ doesn't like an argument named 'class' ~~ Michael Sannella [[alternative HTML version deleted]]

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]]

...any useful documents. Actually, the question is related to the SharedObject package that Benjamin has pointed to. I wanna avoid sharing an object that has already been shared, so I need to check whether an object is an ALTREP that is defined in my package. Since the ALTREP definition involves an ` R_altrep_class_t` object and a class name, I will expect to see a method defined in R to retrieve such information. I hope this can clarify my question. Best, 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...

...19. okt. 2020 kl. 10.13 skrev Jiefei Wang <szwjf08 at gmail.com>: >> >> 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]] >> >> ______________________________________________ >> R-dev...

...needs two changes: > > 1. add the same __cplusplus check as most of the other header files: > #ifdef __cplusplus > extern "C" { > #endif > ... > #ifdef __cplusplus > } > #endif > > 2. change the line > R_new_altrep(R_altrep_class_t class, SEXP data1, SEXP data2); > to > R_new_altrep(R_altrep_class_t cls, SEXP data1, SEXP data2); > since C++ doesn't like an argument named 'class' > > ~~ Michael Sannella > > [[alternative HTML version deleted]] > > _________________________...

...ternals.h#L325 Den man. 19. okt. 2020 kl. 10.13 skrev Jiefei Wang <szwjf08 at gmail.com>: > > 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]] > > ______________________________________________ > R-devel at r-project.org mailing list >...

...Jiefei Wang <szwjf08 at gmail.com>: > >> > >> 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]] > >> > >> _____________________...