#include <boost/qvm/mat_operations.hpp>
namespace boost
{
namespace qvm
{
//Only enabled if:
// is_mat<A>::value &&
// mat_traits<A>::cols==mat_traits<A>::rows
template <class A>
void set_identity( A & a );
}
}
As if
assign( a, identity_mat< typename mat_traits<A>::scalar_type, mat_traits<A>::rows, mat_traits<A>::cols>());