RE: [Boost-users] Boost lambda and shared_ptr

From: Delfin Rojas (drojas_at_[hidden])
Date: 2005-02-18 16:41:21

I guess I had not done my homework all the way. I found a way to make
bll::bind work when the placeholder is a shared_ptr by dereferencing it. In
other words,

std::for_each(vpFoos2.begin(),vpFoos2.end(),
boost::lambda::bind(&CFoo::SetI,
        *boost::lambda::_1, 5)); 

While this solves most of my problems I still cannot make it work for this
other case:

shared_ptr<CFoo> pFoo(new CFoo);
std::vector<int> vnValues(10, 1);
std::for_each(vnValues.begin(), vnValues.end(),
boost::lambda::bind(&CFoo::SetI, pFoo, boost::lambda::_1));

I tried dereferencing pFoo but it didn't work.

Anyone?

Thanks

-delfin

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Delfin Rojas
> Sent: Friday, February 18, 2005 11:09 AM
> To: boost-users_at_[hidden]
> Subject: RE: [Boost-users] Boost lambda and shared_ptr
> 
> Can somebody comment in this, please?
> 
> Thanks
> 
> -delfin
> 
> > -----Original Message-----
> > From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> > bounces_at_[hidden]] On Behalf Of Delfin Rojas
> > Sent: Wednesday, February 16, 2005 7:09 PM
> > To: boost-users_at_[hidden]
> > Subject: [Boost-users] Boost lambda and shared_ptr
> >
> > Hi all,
> >
> > I would like to know if there is a way right now or if there is a plan
> to
> > add the possibility of using bll::bind (boost lambda bind) with
> shared_ptr
> > as one uses it with normal pointers.
> >
> > This functionality is currently supported by boost::bind but I cannot
> find
> > a
> > way to make it work with lambda bind.
> >
> > For example:
> >
> > class CFoo
> > {
> > public:
> > 	void SetI(const int & nI) { ... }
> > };
> >
> > std::vector<CFoo*> vpFoos;
> > std::vector< boost::shared_ptr<CFoo> > vpFoos2;
> >
> > //Assume I initialize the vectors
> >
> > std::for_each(vpFoos.begin(),vpFoos.end(),
> boost::lambda::bind(&CFoo::SetI,
> > boost::lambda::_1, 5)); //Works great
> >
> > //I _cannot_ find to make this work with vpFoos2; I _can_ make it work
> > with
> > boost::bind.
> >
> >
> > Thanks
> >
> > -delfin
> >
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users