Function as_string

inst/include/Rcpp/as.h:60–63

        template <typename T> T as_string(SEXP x, Rcpp::traits::true_type) {
            const char* y = check_single_string(x);
            return std::wstring(y, y+strlen(y));
        }

        template <typename T> T as_string(SEXP x, Rcpp::traits::false_type) {
            return check_single_string(x);