2800             # we need to consume all and try again

  2800             # we need to consume all and try again

  2801             for x in self._consumegen():

  2801             for x in self._consumegen():

  2802                 pass

  2802                 pass

  2803             return self.first()

  2803             return self.first()

  2804         if self:

  2804         if self:

  2806         return None

  2806         return None

  2807 

  2807 

  2808     def last(self):

  2808     def last(self):

  2809         if self._ascending:

  2809         if self._ascending:

  2810             it = self.fastdesc

  2810             it = self.fastdesc

  2814             # we need to consume all and try again

  2814             # we need to consume all and try again

  2815             for x in self._consumegen():

  2815             for x in self._consumegen():

  2816                 pass

  2816                 pass

  2817             return self.first()

  2817             return self.first()

  2818         if self:

  2818         if self:

  2820         return None

  2820         return None

  2821 

  2821 

  2822 def spanset(repo, start=None, end=None):

  2822 def spanset(repo, start=None, end=None):

  2823     """factory function to dispatch between fullreposet and actual spanset

  2823     """factory function to dispatch between fullreposet and actual spanset

  2824 

  2824