convert Rcpp::CharacterVector to std::string

Question

I am trying to open a file within an Rcpp function, so I need the file name as a char* or std::string.

So far, I have tried the following:

#include &         


        

Answer 1

Rcpp::as() expects a SEXP as input, not a Rcpp::CharacterVector. Try passing the f1 parameter directly to Rcpp::as(), eg:

std::string fname = Rcpp::as(f1); 

Or:

std::string fname = Rcpp::as(f1);