help with rchk warnings on Rf_eval(Rf_lang2(...))

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 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 | edd at debian.org

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help with rchk warnings on Rf_eval(Rf_lang2(...))

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