On Wed, Mar 16, 2022 at 6:42 PM Ville Voutilainen <
ville.voutilainen_at_[hidden]> wrote:

> On Thu, 17 Mar 2022 at 00:15, Tony V E <tvaneerd_at_[hidden]> wrote:
> >> I fail to see why you and Nevin think hive should have an equality.
> >
> >
> > Because conceptually, practically, and uh "patterningly" (ie pattern of
> other containers) it makes sense.
>
> That explanation makes no sense to me. hive is substantially different
> from other containers that I don't
> know what concept you're talking about. Same goes for "patterningly"
> and "practically".
>
> > But by "practically" I mean, it is a normal thing to do with a
> container, and it can be useful.
>
> I don't think it's in any way a normal thing to do with a hive.
>
> >> None of that suggests to me that
> >> we should perform hitherto untested heroics to get the equality,
> > Well, it isn't really heroics, and wouldn't be untested.
>
> Do we have a hive implementation that has field experience with an
> operator==?
>
> >> especially when there's barely any use cases for it.
> > I mostly agree. But if you never call it, then it is no big deal! :-)
>
> Ah, like std::sort doesn't need to require a randomaccessrange, just
> don't ever call it on a std::list? :)
>
> >> The lack of
> >> such an equality is just the nature of the beast of how hive works, if
> >> you ask me.
> > I don't think it is the nature of the concept of the container, but it
> is an outcome of how it would need to be implemented.
>
> I fail to see the difference. hive makes particular trade-offs to
> achieve its semantics and its performance guarantees,
> and this is one of them. It arises out of the concept of the
> container, and is therefore not just an implementation detail.
>


If it was somehow magically linear (and non-allocating), I'd say it should
have == like all the other containers.
But it isn't.
Now, yes, that is a result of its semantics and perf guarantees, but I
don't think "not having ==" was a design goal. Not having == was
collateral damage of the other design goals. Subtle, and maybe unimportant
distinction.

The concept of equality of a hive is "yep, has the same bees". I don't see
anything wrong with that idea, nor do I think it goes against the concept
of the container. It just isn't worth the cost.

Anyhow, we are approaching violent agreement.

-- 
Be seeing you,
Tony