 struct direct_selfadjoint_eigenvalues<SolverType,0,false> {   typedef typename SolverType::MatrixType MatrixType;   typedef typename SolverType::RealVectorType VectorType;   typedef typename SolverType::Scalar Scalar;   typedef typename SolverType::EigenvectorsType EigenvectorsType;      EIGEN_DEVICE_FUNC   static inline void computeRoots(const MatrixType& m, VectorType& roots)   {     