* Interface to GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2004 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
{
GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
+ friend class realsymbol;
+
// types
/** Symbols as keys to expressions - only for ginsh. */
- class assigned_ex_info {
- friend class ptr<assigned_ex_info>;
+ class assigned_ex_info : public refcounted {
public:
- assigned_ex_info(); ///< Default ctor
- bool is_assigned; ///< True if there is an expression assigned
- ex assigned_expression; ///< The actual expression
- private:
- size_t refcount; ///< Reference counter, managed by ptr<assigned_ex_info>
+ assigned_ex_info() throw(); ///< Default ctor
+ bool is_assigned; ///< True if there is an expression assigned
+ ex assigned_expression; ///< The actual expression
};
// member functions
// other constructors
public:
- explicit symbol(const std::string & initname);
- explicit symbol(const std::string & initname, const std::string & texname);
+ 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, unsigned rt, unsigned rtt, unsigned domain = domain::complex);
+ symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = domain::complex);
// functions overriding virtual functions from base classes
public:
ex series(const relational & s, int order, unsigned options = 0) const;
ex subs(const exmap & m, unsigned options = 0) const { return subs_one_level(m, options); } // overwrites basic::subs() for performance reasons
ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
- ex to_rational(lst &repl_lst) const;
- ex to_polynomial(lst &repl_lst) const;
+ 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; }
+ ex conjugate() const;
protected:
ex derivative(const symbol & s) const;
bool is_equal_same_type(const basic & other) const;
void unassign();
void set_name(const std::string & n) { name = n; }
std::string get_name() const { return name; }
+ unsigned get_domain() const { return domain; }
protected:
void do_print(const print_context & c, unsigned level) const;
void do_print_latex(const print_latex & c, unsigned level) const;
unsigned serial; ///< unique serial number for comparison
std::string name; ///< printname of this symbol
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()
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, unsigned rtt, unsigned domain = domain::real);
+ realsymbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned 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)
{
- return obj.tinfo()==TINFO_symbol;
+ return obj.tinfo() == TINFO_symbol;
+}
+
+/** 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) && (static_cast<const symbol &>(obj).get_domain() == domain::real);
}
// wrapper functions around member functions