ref: 4f0538a0ae8bc62d076cfd5c60885fe66179e178 dir: /src/io.h/
sl_ios *toio(sl_v v); bool isio(sl_v v) sl_purefn; sl_v io_to_str(sl_v *ps); void io_init(void); extern sl_v sl_iooutsym; extern sl_type *sl_iotype;