Function regexMatches

src/attributes.cpp:839–848

    namespace {

        Rcpp::List regexMatches(Rcpp::CharacterVector lines,
                                const std::string& regex)
        {
            Rcpp::Environment base("package:base");
            Rcpp::Function regexec = base["regexec"];
            Rcpp::Function regmatches = base["regmatches"];
            Rcpp::RObject result =  regexec(regex, lines);
            Rcpp::List matches = regmatches(lines, result);
            return matches;
        }

        template <typename Stream>
        void readFile(const std::string& file, Stream& os) {