Iterator facade does not work for const iterator with array value type

[Nathan Ridge]

The following code fails to compile:

#include <boost/iterator/iterator_facade.hpp>

struct iterator : boost::iterator_facade<iterator, 
                                         char [4], 
                                         boost::random_access_traversal_tag, 
                                         char const (&)[4]>
{
};

(I omitted the body of the derived class, but that's irrelevant, it's not what's causing the error).

The error is:

In file included from test.cpp:1:
In file included from boost/iterator/iterator_facade.hpp:17:
boost/iterator/detail/operator_brackets_dispatch.hpp:33:12: error: function cannot return array type 'result_type' (aka 'char [4]')
    static result_type apply(Iterator const & i)
           ^
boost/iterator/iterator_facade.hpp:583:16: note: in instantiation of template class 'boost::detail::operator_brackets_value<char [4]>' requested here
      typename operator_brackets_dispatch_::result_type
               ^
test.cpp:3:19: note: in instantiation of template class 'boost::iterator_facade<iterator, char [4], boost::random_access_traversal_tag, char const (&)[4], long>' requested here
struct iterator : boost::iterator_facade<iterator,
                  ^
In file included from test.cpp:1:
boost/iterator/iterator_facade.hpp:583:7: error: function cannot return array type 'typename operator_brackets_dispatch_::result_type' (aka 'char [4]')
      typename operator_brackets_dispatch_::result_type
      ^
test.cpp:3:19: note: in instantiation of template class 'boost::iterator_facade<iterator, char [4], boost::random_access_traversal_tag, char const (&)[4], long>' requested here
struct iterator : boost::iterator_facade<iterator,
                  ^

It would be great if this use case could be supported.