code: def p_Syntax(self, p):
          
          # libsmi: TODO: standalone `BITS' ok? seen in RMON2-MIB
          # libsmi: -> no, it's only allowed in a SEQUENCE {...}
          n = len(p)
          if n == 2:
              p[0] = p[1]
          elif n == 5:
              p[0] = (p[1], p[3])
docs: Syntax : ObjectSyntax
                    | BITS '{' NamedBits '}