[Boost-users] (offlist) Using boost::lamba with a vector of shared_ptr's

From: Peter Dimov (pdimov_at_[hidden])
Date: 2003-11-21 14:37:39

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.

> Yup, bind is special cased for shared_ptr's, ...

No it is not. :-)