text: #include "config.h"
  
  #include <Rcpp.h>
  #include "unwound.h"
  
  // [[Rcpp::interfaces(r, cpp)]]
  
  //' @export
  // [[Rcpp::export]]
  SEXP test_cpp_interface(SEXP x, bool fast = false) {
    unwound_t stack_obj("cpp_interface_upstream");
    if (fast) {
        return Rcpp::Rcpp_fast_eval(x, R_GlobalEnv);
    } else {
        return Rcpp::Rcpp_eval(x, R_GlobalEnv);
    }
  }
  