// utility functions
-/** Return the matrix object handled by an ex. Deprecated: use ex_to<matrix>().
- * This is unsafe: you need to check the type first. */
-inline const matrix &ex_to_matrix(const ex &e)
-{
- return static_cast<const matrix &>(*e.bp);
-}
-
/** Specialization of is_exactly_a<matrix>(obj) for matrix objects. */
template<> inline bool is_exactly_a<matrix>(const basic & obj)
{