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 typedef ex (*evalffunctype)(void);
35 /** This class holds constants, symbols with specific numerical value. Each
36 * object of this class must either provide their own function to evaluate it
37 * to class numeric or provide the constant as a numeric (if it's an exact
39 class constant : public basic
44 // default constructor, destructor, copy constructor assignment operator and helpers
48 constant(constant const & other);
49 // constant const & operator=(constant const & other); /* it's pervert! */
51 void copy(constant const & other);
52 void destroy(bool call_parent);
56 constant(string const & initname, evalffunctype efun=0);
57 constant(string const & initname, numeric const & initnumber);
59 // functions overriding virtual functions from bases classes
61 basic * duplicate() const;
62 void print(ostream & os, unsigned upper_precedence=0) const;
63 void printraw(ostream & os) const;
64 void printtree(ostream & os, unsigned indent) const;
65 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
66 ex evalf(int level=0) const;
67 ex diff(symbol const & s) const;
69 int compare_same_type(basic const & other) const;
70 bool is_equal_same_type(basic const & other) const;
72 // new virtual functions which can be overridden by derived classes
75 // non-virtual functions in this class
85 unsigned serial; //!< unique serial number for comparision
86 static unsigned next_serial;
91 extern const constant some_constant;
92 extern type_info const & typeid_constant;
94 // extern const numeric I;
95 extern const constant Pi;
96 extern const constant Catalan;
97 extern const constant EulerGamma;
99 #ifndef NO_GINAC_NAMESPACE
101 #endif // ndef NO_GINAC_NAMESPACE
103 #endif // ndef __GINAC_CONSTANT_H__