class IDownloaderObserver
{
public:
    virtual void OnCompleted(CString const& fileName)    =0;
};

typedef shared_ptr<IDownloaderObserver> IDownloaderObserverPtr;

typedef vector<IDownloaderObserverPtr> DownloadObservers;

class DownloadSubject
{
public:
    void registerObserver(IDownloaderObserverPtr observer);
    void removeObserver(IDownloaderObserverPtr observer);

protected:
    void notifyCompleted(CString const& fileName);

private:
    /*DownloadObservers*/ vector<IDownloaderObserver*> downloadObservers;
};

void DownloadSubject::notifyCompleted(CString const& fileName)
{
    for_each(    downloadObservers.begin(),
            downloadObservers.end(),
            lambda::bind(&IDownloaderObserver::OnCompleted, lambda::_1, fileName)    );

}

c:\Agile\libr\boost\include\boost-1_33_1\boost\lambda\detail\actions.hpp(96): error C2665: 'boost::lambda::function_adaptor<Func>::apply' : none of the 2 overloads can convert parameter 2 from type 'std::allocator<_Ty>::value_type'
with
[
Func=boost::lambda::return_type_N<boost::lambda::function_action<3>,boost::lambda::lambda_functor_base<boost::lambda::action<3,boost::lambda::function_action<3>>,boost::tuples::tuple<const boost::lambda::detail::bind_traits<void (__thiscall IDownloaderObserver::* const )(const CString &)>::type,const boost::lambda::detail::bind_traits<const boost::lambda::placeholder1_type>::type,const boost::lambda::detail::bind_traits<const CString>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>::sig<boost::tuples::tuple<std::allocator<IDownloaderObserverPtr>::value_type &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::rets_t>::plain_Func
]
and
[
_Ty=IDownloaderObserverPtr
]

AI>class IDownloaderObserver
AI>{
AI>public:
AI>    virtual void OnCompleted(CString const& fileName)    =0;
AI>};

AI>typedef shared_ptr<IDownloaderObserver> IDownloaderObserverPtr;

AI>typedef vector<IDownloaderObserverPtr> DownloadObservers;

AI>class DownloadSubject
AI>{
AI>public:
AI>    void registerObserver(IDownloaderObserverPtr observer);
AI>    void removeObserver(IDownloaderObserverPtr observer);

AI>protected:
AI>    void notifyCompleted(CString const& fileName);

AI>private:
AI>    /*DownloadObservers*/ vector<IDownloaderObserver*> downloadObservers;
AI>};

AI>void DownloadSubject::notifyCompleted(CString const& fileName)
AI>{
AI>    for_each(    downloadObservers.begin(),
AI>            downloadObservers.end(),
AI>            lambda::bind(&IDownloaderObserver::OnCompleted, lambda::_1, fileName)    );

AI>}

AI>

using namespace boost;
for_each(
    downloadObservers.begin()
  , downloadObservers.end()
  , bind(
        &IDownloaderObserver::OnCompleted
      , bind(&DownloadObservers::value_type::get, _1)
      , fileName
      )
  );

Z>а как ты се это преставляешь??

Z>г-н AgIle пытаица заbindить метод IDownloaderObserver'a а for_each упорно пихает в функтор объекты shared_ptr<IDownloaderObserver> -- дело тут совершенно не в bind'e -- товарисча грязно обругивает несогласный (обоснованно) компилятор (который не может вызвать IDownloaderObserver::OnCompleted у shared_ptr'a и пребывает в растерянности от беспардонных действий юзера )

#include <iostream>
#include <algorithm>
#include <vector>
#include <boost/shared_ptr.hpp>
#include <boost/bind.hpp>

class A
{
public:
    virtual void memfn() = 0;
};

class B : public A
{
    int i_;
public:
    B(int i = 0):i_(i){}
    void memfn() { std::cout << "B::memfn() " << i_ << '\n'; }
};

typedef boost::shared_ptr<A> sptr;

int main()
{
    std::vector<sptr> v;
    v.push_back(sptr(new B(1)));
    v.push_back(sptr(new B(3)));
    v.push_back(sptr(new B(5)));
    v.push_back(sptr(new B(7)));
    v.push_back(sptr(new B(9)));
    
    std::for_each(v.begin(), v.end(), bind(&A::memfn, _1));
}

Z>using namespace boost;
Z>for_each(
Z>    downloadObservers.begin()
Z>  , downloadObservers.end()
Z>  , bind(
Z>        &IDownloaderObserver::OnCompleted
Z>      , bind(&DownloadObservers::value_type::get, _1)
Z>      , fileName
Z>      )
Z>  );

Z>

for_each(
          downloadObservers.begin()
        , downloadObservers.end()
        , boost::bind(
                      &IDownloaderObserver::OnCompleted
                    , _1
                    , fileName)
        );

foreach(const boost::shared_ptr<IDownloaderObserver> & item, downloadObservers)
    item->OnCompleted(fileName);