Re: [Boost-Users] shared_ptr and make_indirect_iterator

From: Peter Dimov (pdimov_at_[hidden])
Date: 2002-08-28 09:17:00

From: "Richard Wolf" <richard_at_[hidden]>
> Hi
>
> I'm trying to use make_indirect_iterator on a container of shared_ptrs as
> follows:
>

[...]

> int main()
> {
>     list<shared_ptr<A> > List2;
>
>      // This doesn't work
>     for_each(make_indirect_iterator(List2.begin()),
>                   make_indirect_iterator(List2.end()),
>                   mem_fun_ref(&A::f));
> }

The reason is that make_indirect_iterator tries to instantiate
std::iterator_traits< shared_ptr<A> >, and this fails, because shared_ptr<A>
is not an iterator.

You can make the for_each work by using

for_each(List2.begin(), List2.end(), boost::mem_fn(&A::f)); // in
<boost/mem_fn.hpp>

if that's what you want.