Hi Dirk, Thanks for your attention on this. I was able to find a solution that works for us. Matthew
https://github.com/NOAA-FIMS/ModularTMBExample/blob/map/src/tmb_objective_function.cpp#L133 On Fri, Mar 24, 2023 at 4:36 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > Well, feel free to ignore my post, but the gist was that anything you have > access to in R can be passed by your R API code to your Rcpp code. Also, > due to R's GC you should usually avoid caching references between calls to > your Rcpp code anyway. > > On March 24, 2023 12:40:43 PM PDT, Matthew Supernaw - NOAA Federal < > matthew.super...@noaa.gov> wrote: > >Hi Jeff, > >I'm not sure I understand your comment. The code is part of a package. > >We're just trying to sync the declared object name in the R environment to > >the object in the Rcpp module programmatically from c++ for internal use. > I > >just wondered if there was a way to access the wrapped object in the > >Rcpp:::PreserveStorage class and Dirk answered that question. > >Thanks. > >Matthew > > > > > >On Fri, Mar 24, 2023 at 2:34 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us> > >wrote: > > > >> Matthew... the normal context for sharing Rcpp code is within a package. > >> It is a no-brainer to have an R API called by the user that calls > whatever > >> Rcpp code it needs to, which is why your objection seems inappropriate > to > >> me. > >> > >> On March 24, 2023 10:43:34 AM PDT, Dirk Eddelbuettel <e...@debian.org> > >> wrote: > >> > > >> >On 24 March 2023 at 13:08, Matthew Supernaw - NOAA Federal wrote: > >> >| I'm sure it's possible to do from the R side, however, the > requirement > >> is to > >> >| hide this from the end user and set the reference objects name to the > >> declared > >> >| name from the R environment. If I view the environment in RStudio, > >> there is > >> >| much more information available. ls() only returns a list of objects > by > >> their > >> >| declared name. I'm wondering how to get more details about elements > in > >> the > >> >| environment. > >> > > >> >Thanks for additional color. That may be a very interesting and > valuable > >> >question _for the C API of R_ and youe guess of "maybe Rcpp has a > helper" > >> is > >> >a good one. Sadly, I fear we may not have anything for you. > >> > > >> >Dirk > >> > > >> >-- > >> >dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org > >> >_______________________________________________ > >> >Rcpp-devel mailing list > >> >Rcpp-devel@lists.r-forge.r-project.org > >> > > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel > >> -- > >> Sent from my phone. Please excuse my brevity. > >> > > > > > > -- > Sent from my phone. Please excuse my brevity. > -- Matthew Supernaw *Scientific Software Developer* *National Oceanic and Atmospheric Administration* *Office Of Science and Technology* *NOAA Fisheries | *U.S. Department of Commerce Phone 248 - 396 - 7797
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