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From: David Abrahams (dave_at_[hidden])
Date: 2003-11-21 20:28:48

"Peter Dimov" <pdimov_at_[hidden]> writes:

> Hi,
> Jaakko Jarvi wrote:
>>> The second alternative doesn't work since Lambda doesn't support *_1
>>> for shared_ptr.
>> In particular, Lambda's return type deduction templates are not aware
>> of shared_ptr.
> They do not need to be aware of shared_ptr. shared_ptr provides
> ::element_type, for consistency with std::auto_ptr. boost::shared_ptr also
> has ::reference, although tr1::shared_ptr might not. You just need to look
> for the individual typedef and not instantiate iterator_traits prematurely.

But what if iterator_traits is specialized? The typedef could say the
wrong thing.

Dave Abrahams
Boost Consulting

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