Hello Rob,

> Subject: [Boost-users] [bind] How do I....?

>
> Use bind to call a free function on a vector of shared_ptrs?
>
> struct A { };
> void f(const A&);
> std::vector<boost::shared_ptr<A> > v;
>
> for_each(v.begin(), v.end(), boost::bind(f, ???? ) );
>
> what goes where ???? is?
>

You have two options if you want to use binders:

1) Use Boost.Bind with nested binds, binding operator* of shared_ptr in the inner bind.

 for_each(vec.begin(), vec.end(), boost::bind(&foo, boost::bind(&boost::shared_ptr<A>::operator*, _1)));

2) Use Boost.Lambda's bind() and dereference the placeholder directly in the bind expression.

 for_each(vec.begin(), vec.end(), bind(&foo, *_1));