[PATCH] start of rewrite of unordered_{set,map}

Jonathan Wakely jwakely@redhat.com
Thu Sep 17 14:33:00 GMT 2015


Oops, I meant to reply to the lists, not just Geoff ...


On 16/09/15 18:35 +0100, Jonathan Wakely wrote:
>On 16/09/15 10:08 -0700, Geoff Pike wrote:
>>Also, to clarify, I am primarily seeking high-level comments; I am new
>>here and don't want to waste anybody's time.
>
>Hi Geoff,
>
>This looks very interesting indeed, but we've just gone through one
>big ABI break earlier this year and my nerves and our users probably
>can't take another one in the near future!
>
>That means *replacing* the current containers is unlikely in the short
>term, but we could certainly offer alternatives (as e.g.
>__gnu_cxx::unordered_map instead of std::unordered_map), and could
>maybe have a configure option that would make them the default.
>
>So I don't want to discourage you from working on this, but would have
>been a lot more positive about the proposed changes 18 months ago :-)
>
>
>P.S.  While I have your attention, could I ask you to comment on
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55815 ? I think I tried
>to reach you about it a while back, via someone else at Google, but
>failed. That's another case where we have probably missed our chance
>to change the default (i.e. std::hash) but we could still offer a
>__gnu_cxx::__sip_hash functor as an extension.
>
>



More information about the Gcc-patches mailing list