From: Johannes Sixt <j6t@kdbg.org>
Date: Sat, 05 Mar 2022 22:17:56 GMT
Subject: Re: [PATCH v4] userdiff: add builtin diff driver for Kotlin language.
Message-ID: <bee0dba1-e01c-4a2b-6a46-79361bfb3459@kdbg.org>
In-Reply-To: <6481bd49-eac9-9ebe-3d19-866107378f81@gmail.com>

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