value_at

Returns the actual type at a given index from the Sequence.

template<
    typename Seq,
    typename N>
struct value_at
{
    typedef unspecified type;
};

Parameter	Requirement	Description
`Seq`	A model of Forward Sequence	Argument sequence
`N`	An MPL Integral Constant	Index of element

result_of::value_at<Seq, N>::type

Return type: Any type.

Semantics: Returns the actual type at the Nth element of Seq.

#include <boost/fusion/sequence/intrinsic/value_at.hpp>

typedef vector<int,float,char> vec;
BOOST_MPL_ASSERT((boost::is_same<result_of::value_at<vec, boost::mpl::int_<1> >::type, float>));