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Subject: Re: [boost] [odeint] Iterator semantics
From: Dave Abrahams (dave_at_[hidden])
Date: 2012-08-18 20:57:24

on Fri Aug 10 2012, Karsten Ahnert <> wrote:

> I tried to find different solutions but it is difficult since one is
> more or less always checking for overlap. On the other hand I wonder if
> the requirement of transitivity can be relaxed in this case. I can not
> imagine an algorithm where the above situation might occur. The iterator
> is a single pass iterator which limits the number of possible
> algorithms. Furthermore the violation can only appear if two end
> iterators are used. This is not the case for all algorithms in the
> standard and Boost.Range.
> Any ideas or comments? Is it really necessary to require transitivity?

Yes. Transitivity of == is fundamental.

Dave Abrahams
BoostPro Computing                  Software Development        Training             Clang/LLVM/EDG Compilers  C++  Boost

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