func Init()
  lng.decl_loc_var(ds, 'string')
end

func doDelete()
  println(ds, ' := ', SrcStr, ';') 
  println('Delete(', ds, ',', Position, ',', CharCount, ');')
  event(onDelete, ds)
end

func Result()
  if(not linked(doDelete))
    println(ds, ' := ', SrcStr, ';') 
    println('Delete(', ds, ',', Position, ',', CharCount, ');')
  end
  return(ds)
end