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Returns the actual type at a given index from the Sequence.
template< typename Seq, typename M> struct value_at { typedef unspecified type; };
Table 1.30. Parameters
| Parameter | Requirement | Description | 
|---|---|---|
| 
                       | A model of Random Access Sequence | Argument sequence | 
| 
                       | Index of element | 
result_of::value_at<Seq, M>::type
Return type: Any type.
            Semantics: Returns the actual type at
            the Mth element of Seq.
          
#include <boost/fusion/sequence/intrinsic/value_at.hpp> #include <boost/fusion/include/value_at.hpp>
typedefvector<int,float,char> vec; BOOST_MPL_ASSERT((boost::is_same<result_of::value_at<vec, boost::mpl::int_<1> >::type, float>));