void source(unsigned count, const char **str, const int *len);
void source(const std::string &str);
void source(const char *str, int len);
void compile();
unsigned get_id() const { return id; }
void source(unsigned count, const char **str, const int *len);
void source(const std::string &str);
void source(const char *str, int len);
void compile();
unsigned get_id() const { return id; }