code: def p_InSwitchDefList(p):
      '''
      InSwitchDefList : InSwitchDef
                      | InSwitchDefList InSwitchDef
     '''
      if len(p) <= 2:
          p[0] = InSwitchDefList(None, p[1])
      else:
          p[0] = InSwitchDefList(p[1], p[2]f p_InSwitchDefList(p):
      '''
      InSwitchDefList : InSwitchDef
                      | InSwitchDefList InSwitchDef
     '''
      if len(p) <= 2:
          p[0] = InSwitchDefList(None, p[1])
      else:
          p[0] = InSwitchDefList(p[1], p[2])
docs: InSwitchDefList : InSwitchDef
                      | InSwitchDefList InSwitchDef