# QVM: Quaternions, Vectors, Matrices

### boost/qvm/mat_traits.hpp

This header defines the mat_traits template which can be specialized to register user-defined matrix types into Boost QVM.

### Synopsis:

#include <boost/qvm/mat_traits.hpp>

    namespace boost
    {
        namespace qvm
        {
            template <class T>
            struct is_mat
            {
                static bool const value=/*unspecified*/;
            };

            template <class M>
            struct mat_traits
            {
                /*main template members unspecified*/
            };

            /*
            User-defined (possibly partial) specializations:

            template <>
            struct mat_traits<M>
            {
                static int const rows = /*user-defined*/;
                static int const cols = /*user-defined*/;
                typedef /*user-defined*/ scalar_type;

                template <int R,int C> static inline scalar_type read_element( Matrix const & m );
                template <int R,int C> static inline scalar_type & write_element( Matrix & m );

                static inline scalar_type read_element_idx( int r, int c, Matrix const & m );
                static inline scalar_type & write_element_idx( int r, int c, Matrix & m );
            };
            */
        }
    }

See also: is_mat | mat_traits