GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
friend class realsymbol;
+ friend class possymbol;
// types
unsigned return_type() const { return ret_type; }
tinfo_t return_type_tinfo() const { return ret_type_tinfo; }
ex conjugate() const;
+ ex real_part() const;
+ ex imag_part() const;
+ bool is_polynomial(const ex & var) const;
protected:
ex derivative(const symbol & s) const;
bool is_equal_same_type(const basic & other) const;
};
+/** Specialization of symbol to real domain */
+class possymbol : public symbol
+{
+ // constructors
+public:
+ possymbol();
+ explicit possymbol(const std::string & initname, unsigned domain = domain::positive);
+ possymbol(const std::string & initname, const std::string & texname, unsigned domain = domain::positive);
+ possymbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::positive);
+ possymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::positive);
+};
+
+
// utility functions
/** Specialization of is_exactly_a<realsymbol>(obj) for realsymbol objects. */
template<> inline bool is_exactly_a<realsymbol>(const basic & obj)
{
- return (obj.tinfo() == &symbol::tinfo_static) && (static_cast<const symbol &>(obj).get_domain() == domain::real);
+ if (obj.tinfo() != &symbol::tinfo_static)
+ return false;
+ unsigned domain = static_cast<const symbol &>(obj).get_domain();
+ return domain==domain::real || domain==domain::positive;
+}
+
+/** Specialization of is_exactly_a<possymbol>(obj) for possymbol objects. */
+template<> inline bool is_exactly_a<possymbol>(const basic & obj)
+{
+ if (obj.tinfo() != &symbol::tinfo_static)
+ return false;
+ unsigned domain = static_cast<const symbol &>(obj).get_domain();
+ return domain == domain::positive;
}
// wrapper functions around member functions