/** @file constant.h
*
- * Interface to GiNaC's constant types and some special constants.
- *
- * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ * Interface to GiNaC's constant types and some special constants. */
+
+/*
+ * GiNaC Copyright (C) 1999-2008 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__
#define __GINAC_CONSTANT_H__
#include <string>
+#include "basic.h"
+#include "ex.h"
+namespace GiNaC {
+
+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
* to class numeric or provide the constant as a numeric (if it's an exact
* number). */
class constant : public basic
{
-
+ GINAC_DECLARE_REGISTERED_CLASS(constant, basic)
+
// member functions
-
- // default constructor, destructor, copy constructor assignment operator and helpers
+
+ // other constructors
public:
- ~constant();
- constant(constant const & other);
- // constant const & operator=(constant const & other); /* it's pervert! */
-protected:
- void copy(constant const & other);
- void destroy(bool call_parent);
-
- // other constructors
+ constant(const std::string & initname, evalffunctype efun = 0, const std::string & texname = std::string(), unsigned domain = domain::complex);
+ constant(const std::string & initname, const numeric & initnumber, const std::string & texname = std::string(), unsigned domain = domain::complex);
+
+ // functions overriding virtual functions from base classes
public:
- constant(string const & initname, ex (*efun)()=0);
- constant(string const & initname, numeric const & initnumber);
-
- // functions overriding virtual functions from bases classes
-public:
- basic * duplicate() const;
- void printraw(ostream & os) const;
- void print(ostream & os, unsigned upper_precedence=0) const;
- void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
- ex evalf(int level=0) const;
- ex diff(symbol const & s) const;
+ bool info(unsigned inf) const;
+ ex evalf(int level = 0) const;
+ bool is_polynomial(const ex & var) const;
+ ex conjugate() const;
+ ex real_part() const;
+ ex imag_part() const;
protected:
- int compare_same_type(basic const & other) const;
- bool is_equal_same_type(basic const & other) const;
-
- // new virtual functions which can be overridden by derived classes
- // none
-
- // non-virtual functions in this class
- // none
+ ex derivative(const symbol & s) const;
+ bool is_equal_same_type(const basic & other) const;
+ unsigned calchash() const;
+
+ // non-virtual functions in this class
+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:
- string name;
- ex (*ef)();
- numeric * number;
- bool fct_assigned;
- unsigned serial; //!< unique serial number for comparision
- static unsigned next_serial;
+ std::string name; ///< printname of this constant
+ std::string TeX_name; ///< LaTeX name
+ evalffunctype ef;
+ ex number; ///< numerical value this constant evalf()s to
+ unsigned serial; ///< unique serial number for comparison
+ static unsigned next_serial;
+ unsigned domain; ///< numerical value this constant evalf()s to
};
-// global constants
-
-extern const constant some_constant;
-extern type_info const & typeid_constant;
-
-// extern const numeric I;
extern const constant Pi;
extern const constant Catalan;
-extern const constant EulerGamma;
+extern const constant Euler;
+
+} // namespace GiNaC
#endif // ndef __GINAC_CONSTANT_H__