QVM: Quaternions, Vectors, Matrices

#include <boost/qvm/vec_index.hpp>

namespace boost
{
    namespace qvm
    {
        //Only enabled if:
        //  is_vec<A>::value
        template <class A>
        typename vec_traits<A>::scalar_type
        vec_index_read( A const & a, int i );        
        
        //Only enabled if:
        //  is_vec<A>::value
        template <class A>
        typename vec_traits<A>::scalar_type &
        vec_index_write( A & a, int i );
    }
}