On 20-Dec-2010 23:26, Christian Brabandt wrote:
> Hi Bram,
> when working with csv-files, I have often wished for more than 10
> capturing groups. So here is a patch, that allows 99 capturing groups in
> the replacement part. This uses the perl-like syntax ${1} until ${99}
> for the capturing groups in the replacement part. If there does not
> exist a capturing group, this will resolve to the empty string.
>
> I have tested it locally and it works for me[1]. This obviously needs to
> be very well tested, before included.
>
> [1] running make test as well as trying several different :s commands.
>
> regards,
> Christian
I don't like the fact that this introduces another character / substring that
needs to be escaped in the replacement text, thus breaking backward
compatibility and making scripting more difficult. So far, only "\" (and "&" and
"~" depending on 'magic', cp. :help sub-replace-special) need to be escaped.
Since that many capturing groups are rarely used (but I agree, could sometimes
be useful), how about just making them available through submatch({nr}), as in:
:s/{pat}/\=submatch(99)/
This would keep compatibility. Alternatively, couldn't something starting with a
backslash be used, for example \{99}?
-- regards, ingo
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