[PATCH] D16467: [libcxx] re.results.form: Format out-of-range subexpression references as null

[Duncan P. N. Exon Smith via cfe-commits]

Given your follow-up review, and the behaviour of
match_results::operator[], do you still have reservations?

> On 2016-Jan-25, at 08:19, Marshall Clow <mclow.lists at gmail.com> wrote:
> 
> mclow.lists added a comment.
> 
> Not crashing is good; but silently returning a "wrong" answer rubs me the wrong way.  I'll do some research and get back to you on this, but maybe throwing an exception is a better response.
> 
> The code looks fine, though; I'm just not sure it's the right thing to do.
> 
> 
> http://reviews.llvm.org/D16467
> 
> 
>