> Shield<SEXP> res(Rcpp_fast_eval(Rf_lang2(asEnvironmentSym, x), R_GlobalEnv));
The call should be protected before evaluation though. So more like: Shield<SEXP> call(Rf_lang2(asEnvironmentSym, x)); return Rcpp_fast_eval(call, R_GlobalEnv); Best, Lionel On 3/23/20, Dirk Eddelbuettel <e...@debian.org> wrote: > > > On 23 March 2020 at 17:07, Ben Bolker wrote: > | Or is there a way I can use Shield() since this an Rcpp-based project > | anyway? > > Yes you can, and I would recommend it. > > Example from Rcpp itself, file Environment.h: > > Shield<SEXP> res(Rcpp_fast_eval(Rf_lang2(asEnvironmentSym, x), > R_GlobalEnv)); > > For Rcpp_fast_eval, you may still need to #define RCPP_USE_UNWIND_PROTECT > before including Rcpp.h; as I recall we were seeing too many side effects > in > other packages when globally enabling it. Or you can play it safe and > simply > use Rcpp_eval. > > This really was more of a rcpp-devel question. > > Dirk > > -- > http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
