Re: [boost] Re: Cycle Iterator Adapter

From: Thomas Witt (witt_at_[hidden])
Date: 2002-02-05 15:44:59

On Tuesday 05 February 2002 21:37, you wrote:
> --- In boost_at_y..., nbecker_at_f... wrote:
> > >>>>> "rogeeff" == rogeeff  <rogeeff_at_m...> writes:
> >
> >     rogeeff> --- In boost_at_y..., nbecker_at_f... wrote:
> >     >> What is the purpose of cycle_size_()?  Do you really give
>
> any useful
>
> >     >> meaning to cycle_size < 0?
> >
> >     rogeeff> cycle_size_() in private helper function used to
>
> calculate *positive*
>
> >     rogeeff> cycle size. Did I answer yout question?
> >
> > No.  My question is, can cycle_size every be negative?  Why?  What
> > does negative cycle size mean?  I prefer negative cycle size is not
> > allowed.
>
> m_bounds.second - m_bounds.first could be negative. But cycle_size_()
> is always returing positive number. What is cycle_size you mentioning?

Is this really true. I think all methods assume second >= first and I think 
thats ok. m_bounds should be required to be a valid half_open range.

I hadn't time to check it but I really feel uncomfortable with the advance 
code. Gennadiy are you aware of the fact that advance, despite its name, 
might be called with negative argument? That one fooled me. I hope to give it 
a closer look tomorrow

Thomas

>
> Gennadiy.
>
>
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