Re: [hub] on the specialized iteration over elements

El 17/04/2026 a las 0:23, Jean-Louis Leroy via Boost escribió:
>> Third, the interface is rather unusual, and it allows one hub to iterate
>> over another hub's elements:
>>
>> hub<T> h, g;
>> h.visit(g.begin(), g.end(), fun);
> I guess it can be useful to iterate over a narrower range. But in
> that spirit, I would expect 'visit' to return the "end" iterator.

To be quite honest, I don't see tremendous value on iterating over a 
range narrower than the whole container, because insertion order in hub 
is arbitrary and there's no meaningul property that elements of a 
subrange would share --same rationale applies to other unordered 
containers like, for instance, std::unordered_map. The function 
visit(first, last, f) is there for operational closure reasons, so to say.

Joaquín M López Muñoz
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