3 * Interface to GiNaC's constant types and some special constants. */
6 * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef __GINAC_CONSTANT_H__
24 #define __GINAC_CONSTANT_H__
27 #include <ginac/basic.h>
29 #ifndef NO_GINAC_NAMESPACE
31 #endif // ndef NO_GINAC_NAMESPACE
33 /** This class holds constants, symbols with specific numerical value. Each
34 * object of this class must either provide their own function to evaluate it
35 * to class numeric or provide the constant as a numeric (if it's an exact
37 class constant : public basic
42 // default constructor, destructor, copy constructor assignment operator and helpers
45 constant(constant const & other);
46 // constant const & operator=(constant const & other); /* it's pervert! */
48 void copy(constant const & other);
49 void destroy(bool call_parent);
53 constant(string const & initname, ex (*efun)()=0);
54 constant(string const & initname, numeric const & initnumber);
56 // functions overriding virtual functions from bases classes
58 basic * duplicate() const;
59 void printraw(ostream & os) const;
60 void print(ostream & os, unsigned upper_precedence=0) const;
61 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
62 ex evalf(int level=0) const;
63 ex diff(symbol const & s) const;
65 int compare_same_type(basic const & other) const;
66 bool is_equal_same_type(basic const & other) const;
68 // new virtual functions which can be overridden by derived classes
71 // non-virtual functions in this class
81 unsigned serial; //!< unique serial number for comparision
82 static unsigned next_serial;
87 extern const constant some_constant;
88 extern type_info const & typeid_constant;
90 // extern const numeric I;
91 extern const constant Pi;
92 extern const constant Catalan;
93 extern const constant EulerGamma;
95 #ifndef NO_GINAC_NAMESPACE
97 #endif // ndef NO_GINAC_NAMESPACE
99 #endif // ndef __GINAC_CONSTANT_H__