code: def _operator_symbol_handler(c, ctx):
      
      assert c in _OPERATORS
      ctx.set_unicode()
      val = ctx.value
      val.append(c)
      c, self = yield
      trans = ctx.immediate_transition(self)
      while c in _OPERATORS:
          val.append(c)
          c, _ = yield trans
      yield ctx.event_transition(IonEvent, IonEventType.SCALAR, IonType.SYMBOL, val.as_symbol())
docs: Handles operator symbol values within s-expressions.