extern const constant Euler;
// utility functions
+
+/** Return the constant object handled by an ex.
+ * This is unsafe: you need to check the type first. */
inline const constant &ex_to_constant(const ex &e)
{
return static_cast<const constant &>(*e.bp);
}
+/** Specialization of is_exactly_a<constant>(obj) for constant objects. */
+template<> inline bool is_exactly_a<constant>(const basic & obj)
+{
+ return obj.tinfo()==TINFO_constant;
+}
+
} // namespace GiNaC
#endif // ndef __GINAC_CONSTANT_H__