* Interface to GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2005 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_CONSTANT_H__
namespace GiNaC {
-typedef ex (*evalffunctype)(void);
+typedef ex (*evalffunctype)();
/** This class holds constants, symbols with specific numerical value. Each
* object of this class must either provide their own function to evaluate it
// member functions
- // other ctors
+ // other constructors
public:
- constant(const std::string & initname, evalffunctype efun = 0);
- constant(const std::string & initname, const numeric & initnumber);
+ constant(const std::string & initname, evalffunctype efun = 0, const std::string & texname = std::string());
+ constant(const std::string & initname, const numeric & initnumber, const std::string & texname = std::string());
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
- void print(const print_context & c, unsigned level = 0) const;
- int degree(const ex & s) const;
- int ldegree(const ex & s) const;
- ex coeff(const ex & s, int n = 1) const;
ex evalf(int level = 0) const;
protected:
ex derivative(const symbol & s) const;
bool is_equal_same_type(const basic & other) const;
- unsigned calchash(void) const;
-
- // new virtual functions which can be overridden by derived classes
- // none
+ unsigned calchash() const;
// non-virtual functions in this class
- // none
-
+protected:
+ void do_print(const print_context & c, unsigned level) const;
+ void do_print_tree(const print_tree & c, unsigned level) const;
+ void do_print_latex(const print_latex & c, unsigned level) const;
+ void do_print_python_repr(const print_python_repr & c, unsigned level) const;
+
// member variables
-
private:
- std::string name; ///< printname of this constant
+ std::string name; ///< printname of this constant
+ std::string TeX_name; ///< LaTeX name
evalffunctype ef;
- numeric *number; ///< numerical value this constant evalf()s to
- unsigned serial; ///< unique serial number for comparison
+ ex number; ///< numerical value this constant evalf()s to
+ unsigned serial; ///< unique serial number for comparison
static unsigned next_serial;
};
extern const constant Euler;
// utility functions
-inline const constant &ex_to_constant(const ex &e)
+
+/** Specialization of is_exactly_a<constant>(obj) for constant objects. */
+template<> inline bool is_exactly_a<constant>(const basic & obj)
{
- return static_cast<const constant &>(*e.bp);
+ return obj.tinfo()==TINFO_constant;
}
} // namespace GiNaC