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Returns the type that will be returned by dereferencing an iterator.
template< typename I > struct deref { typedef unspecified type; };
Table 1.12. Parameters
| Parameter | Requirement | Description | 
|---|---|---|
| 
                     | Model of Forward Iterator | Operation's argument | 
result_of::deref<I>::type
Return type: Any type
          Semantics: Returns the result of dereferencing
          an iterator of type I.
        
#include <boost/fusion/iterator/deref.hpp> #include <boost/fusion/include/deref.hpp>
typedefvector<int,int&> vec; typedef const vec const_vec; typedefresult_of::begin<vec>::type first; typedefresult_of::next<first>::type second; typedefresult_of::begin<const_vec>::type const_first; typedefresult_of::next<const_first>::type const_second; BOOST_MPL_ASSERT((boost::is_same<result_of::deref<first>::type, int&>)); BOOST_MPL_ASSERT((boost::is_same<result_of::deref<second>::type, int&>));