function 
    /usr/local/lib/janet/spork/misc.janet  on  line  426 , column  1 
    (string->int  str  &opt  base )
    Parse  an  integer  in  the  given  base.  Defaults  to  decimal  (base  10 ).  
    Differs  from  scan-number  in  that  this  does  not  recognize  floating  
    point  notation.