GNU bug report logs - #29343
Match data doesn't contain elements for trailing non-matched subgroups

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From: Noam Postavsky <npostavs <at> gmail.com>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 29343 <at> debbugs.gnu.org
Subject: bug#29343: 27.0.50; Match data doesn't contain elements for non-matched subgroups
Date: Fri, 19 Apr 2019 14:54:01 -0400

Philipp Stephani <p.stephani2 <at> gmail.com> writes:

>> >> You can get that result by passing a list of the expected length as the
>> >> REUSE argument to match-data:
>> >
>> > True, but that also requires knowing the expected length. In the most
>> > general case this should work for unknown regular expressions.

> The context here is https://github.com/magnars/s.el/pull/117.

Ah, I see, the problem is that s-match is trying to present a "nicer"
interface, so it doesn't have a REUSE argument.

> That Emacs doesn't behave this way is surprising and should at least
> be documented.

Yeah, no argument there.

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