Subject: Re: [boost] [algorithm] adjacent_for_each interest?
From: Evgeny Panasyuk (evgeny.panasyuk_at_[hidden])
Date: 2013-02-11 04:18:00
11.02.2013 3:09, Dave Abrahams:
>> In this regard your version at
>> is broken.
>> Because it advertises to work on InputIterator, but it dereferences
>> iterator at same position several times. As the result current
>> implementation is for ForwardIterator.
> That's incorrect. The mental model for InputIterator is an ephemeral
> input stream *with a one-element backing buffer*. You are allowed to
> dereference the same InputIterator multiple times at the same position
> until that iterator or a copy of it is incremented.
Thanks for correction, I should re-phrase my sentence as:
"but it dereferences iterator at same position several times *after
passing to next and/or dereferencing it*" (
-- Evgeny Panasyuk
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