Re: [Boost-Users] Re: shared_ptr and make_indirect_iterator

31 Aug 2002

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"Peter Dimov"  wrote in message
news:00ce01c24f65$03862790$1d00a8c0@pdimov2...
...
I have since added ::value_type to shared_ptr, but unfortunately, this
is
...
apparently not enough. Even though the indirect iterator adaptor needs
only
the value_type, the attempt to instantiate std::iterator_traits means
From: "David Abrahams" 
that
...
...
make_indirect_iterator cannot work with shared_ptr.
Why is that? There's no reason that instantiating
std::iterator_traits should cause a problem by itself.
Try it:

#include 
#include <iterator>

int main()
{
    std::iterator_traits< boost::shared_ptr<int> >::value_type i = 0;
}

When you instantiate iterator_traits, all of its typedefs are instantiated.