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