* Interface to GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __GINAC_SYMBOL_H__
{
GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
+ friend class realsymbol;
+
// types
/** Symbols as keys to expressions - only for ginsh. */
// other constructors
public:
- explicit symbol(const std::string & initname, unsigned domain = symbol_options::complex);
- symbol(const std::string & initname, const std::string & texname, unsigned domain = symbol_options::complex);
- symbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain = symbol_options::complex);
- symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = symbol_options::complex);
+ explicit symbol(const std::string & initname, unsigned domain = domain::complex);
+ symbol(const std::string & initname, const std::string & texname, unsigned domain = domain::complex);
+ symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned domain);
+ symbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::complex);
+ symbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::complex);
// functions overriding virtual functions from base classes
public:
ex to_rational(exmap & repl) const;
ex to_polynomial(exmap & repl) const;
unsigned return_type() const { return ret_type; }
- unsigned return_type_tinfo() const { return ret_type_tinfo; }
+ 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;
std::string TeX_name; ///< LaTeX name of this symbol
unsigned domain; ///< domain of symbol, complex (default) or real
unsigned ret_type; ///< value returned by return_type()
- unsigned ret_type_tinfo; ///< value returned by return_type_tinfo()
+ tinfo_t ret_type_tinfo; ///< value returned by return_type_tinfo()
private:
static unsigned next_serial;
};
+/** Specialization of symbol to real domain */
+class realsymbol : public symbol
+{
+ // constructors
+public:
+ realsymbol();
+ explicit realsymbol(const std::string & initname, unsigned domain = domain::real);
+ realsymbol(const std::string & initname, const std::string & texname, unsigned domain = domain::real);
+ realsymbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::real);
+ realsymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::real);
+};
+
+
// utility functions
-/** Specialization of is_exactly_a<symbol>(obj) for symbol objects. */
-template<> inline bool is_exactly_a<symbol>(const basic & obj)
+/** Specialization of is_exactly_a<realsymbol>(obj) for realsymbol objects. */
+template<> inline bool is_exactly_a<realsymbol>(const basic & obj)
{
- return obj.tinfo()==TINFO_symbol;
+ if (obj.tinfo() != &symbol::tinfo_static)
+ return false;
+ unsigned domain = static_cast<const symbol &>(obj).get_domain();
+ return domain==domain::real || domain==domain::positive;
}
// wrapper functions around member functions