Re: [boost] [iterators][range] size compile failure in 1.35

From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2008-06-06 13:28:56

David Abrahams wrote:
> on Fri Jun 06 2008, Jeff Flinn <TriumphSprint2000-AT-hotmail.com> wrote:
> 
>> I'm moving from 1.34.1 to 1.35.0
>>
>> The following compiles in 1.34.1 and fails in 1.35.0 on MSVC 8. Any 
>> thoughts on how to correct this?
> 
> Jeff,
> 
> in 1.35 I'm pretty sure that iterator_range<T>::size() only works when T
> is a random access iterator, and filtered iterators are by necessity
> bidirectional.  I suggest you use
> 
>                 std::distance(r.begin(), r.end())
> 
> if you're willing to pay for O(N) execution.
> 

Hmm, it looks like that's what iterator_range<T>::size() did in 1.34.1 
while 1.35 returns m_Begin - m_End. Any idea why this was done?

Thanks, Jeff