Am 05.03.22 um 20:18 schrieb jaydeepjd.8914@gmail.com:

Maybe we could just use cpp's regex for floating numbers starting with
decimal point:

"|\\.[0-9][0-9]*([Ee][-+]?[0-9]+)?[fFlL]?"

Yes, but with '_' permitted after the first digit:

	"|\\.[0-9][0-9_]*([Ee][-+]?[0-9]+)?[fFlL]?"

Or maybe, we can make the current regex for floats and integers a bit
more loose:

"|[0-9.][0-9_.]*([Ee][*-]?[0-9]+)?[FfLl]*"
What do you think would be better?

No, that does not work, either, because it splits X.Find into X .F ind.
I fixed that very problem with the cpp driver recently. We do need a
separate alternative for the floatingpoint numbers that start with a
decimal point.

-- Hannes