REF: handle searchsorted casting within DatetimeLikeArray
> I think changing exception types and error messages should have a whatsnew. also in the case of Exception type, I would regard a change as a breaking change. not sure what others think. Should we have a deprecation for this?

If it were on the Index subclasses I would agree, but for the DTA/TDA/PA (which we dont expect users to use directly) I think we're OK > If it were on the Index subclasses I would agree, but for the DTA/TDA/PA (which we dont expect users to use directly) I think we're OK

https://dev.pandas.io/docs/reference/api/pandas.array.html has examples on how to construct these.


 ping thanks