* Interface to GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2000 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
#include <string>
#include "basic.h"
#include "ex.h"
+#include "ptr.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
/** Basic CAS symbol. It has a name because it must know how to output itself.
* It may be assigned an expression, but this feature is only intended for
* first place. */
class symbol : public basic
{
- GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
+ GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
+
+ friend class realsymbol;
// types
+
+ /** Symbols as keys to expressions - only for ginsh. */
+ class assigned_ex_info : public refcounted {
+ public:
+ assigned_ex_info() throw(); ///< Default ctor
+ bool is_assigned; ///< True if there is an expression assigned
+ ex assigned_expression; ///< The actual expression
+ };
- /** Symbols as keys to expressions. */
- class assigned_ex_info {
- public:
- assigned_ex_info(); //!< Default ctor
- bool is_assigned; //!< True if there is an expression assigned
- ex assigned_expression; //!< The actual expression
- unsigned refcount; //!< Yet another refcounter. PLEASE EXPLAIN!
- };
-
// member functions
-
- // default constructor, destructor, copy constructor assignment operator and helpers
+
+ // other constructors
public:
- symbol();
- ~symbol();
- symbol(const symbol & other);
-protected:
- void copy(const symbol & other);
- void destroy(bool call_parent);
-
- // other constructors
+ 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:
- explicit symbol(const string & initname);
-
- // functions overriding virtual functions from base classes
-public:
- basic * duplicate() const;
- void print(ostream & os, unsigned upper_precedence=0) const;
- void printraw(ostream & os) const;
- void printtree(ostream & os, unsigned indent) const;
- void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
- bool info(unsigned inf) const;
- ex expand(unsigned options=0) const;
- bool has(const ex & other) const;
- int degree(const symbol & s) const;
- int ldegree(const symbol & s) const;
- ex coeff(const symbol & s, int n = 1) const;
- ex eval(int level = 0) const;
- ex series(const relational & s, int order) const;
- ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
- ex to_rational(lst &repl_lst) const;
- ex subs(const lst & ls, const lst & lr) const;
+ bool info(unsigned inf) const;
+ ex eval(int level = 0) const;
+ ex evalf(int level = 0) const { return *this; } // overwrites basic::evalf() for performance reasons
+ 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(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;
- int compare_same_type(const basic & other) const;
- bool is_equal_same_type(const basic & other) const;
- unsigned return_type(void) const;
- unsigned return_type_tinfo(void) const;
- unsigned calchash(void) const;
-
- // non-virtual functions in this class
+ ex derivative(const symbol & s) const;
+ bool is_equal_same_type(const basic & other) const;
+ unsigned calchash() const;
+
+ // non-virtual functions in this class
public:
- void assign(const ex & value);
- void unassign(void);
- void setname(const string & n) {name=n;}
- string getname(void) const {return name;}
+ void assign(const ex & value);
+ 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;
+ void do_print_tree(const print_tree & c, unsigned level) const;
+ void do_print_python_repr(const print_python_repr & c, unsigned level) const;
private:
- string & autoname_prefix(void);
+ std::string & autoname_prefix();
+ std::string default_TeX_name() const;
// member variables
protected:
- assigned_ex_info * asexinfop;
- unsigned serial; //!< unique serial number for comparision
- string name;
+ ptr<assigned_ex_info> asexinfop; ///< assigned expression, only for private use by ginsh
+ 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;
+ static unsigned next_serial;
};
-// global constants
-extern const symbol some_symbol;
-extern const type_info & typeid_symbol;
+/** 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
-inline const symbol &ex_to_symbol(const ex &e)
+
+/** 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;
+}
+
+/** Specialization of is_exactly_a<realsymbol>(obj) for realsymbol objects. */
+template<> inline bool is_exactly_a<realsymbol>(const basic & obj)
{
- return static_cast<const symbol &>(*e.bp);
+ return (obj.tinfo() == TINFO_symbol) && (static_cast<const symbol &>(obj).get_domain() == domain::real);
}
// wrapper functions around member functions
inline void unassign(symbol & symarg)
-{ return symarg.unassign(); }
-
-inline int degree(const symbol & a, const symbol & s)
-{ return a.degree(s); }
-
-inline int ldegree(const symbol & a, const symbol & s)
-{ return a.ldegree(s); }
+{ symarg.unassign(); }
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
#endif // ndef __GINAC_SYMBOL_H__
git://www.ginac.de / ginac.git / blobdiff