3 * Interface to relations between expressions. */
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_RELATIONAL_H__
24 #define __GINAC_RELATIONAL_H__
26 #include <ginac/basic.h>
29 #ifndef NO_GINAC_NAMESPACE
31 #endif // ndef NO_GINAC_NAMESPACE
33 /** This class holds a relation consisting of two expressions and a logical
34 * relation between them. */
35 class relational : public basic
40 enum operators { equal,
50 // default constructor, destructor, copy constructor assignment operator and helpers
54 relational(relational const & other);
55 relational const & operator=(relational const & other);
57 void copy(relational const & other);
58 void destroy(bool call_parent);
62 relational(ex const & lhs, ex const & rhs, operators oper=equal);
64 // functions overriding virtual functions from bases classes
66 basic * duplicate() const;
67 void print(ostream & os, unsigned upper_precedence=0) const;
68 void printraw(ostream & os) const;
69 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
70 bool info(unsigned inf) const;
72 ex & let_op(int const i);
73 ex eval(int level=0) const;
74 ex evalf(int level=0) const;
75 ex simplify_ncmul(exvector const & v) const;
77 int compare_same_type(basic const & other) const;
78 unsigned return_type(void) const;
79 unsigned return_type_tinfo(void) const;
81 // new virtual functions which can be overridden by derived classes
84 // non-virtual functions in this class
86 operator bool(void) const;
94 static unsigned precedence;
99 extern const relational some_relational;
100 extern type_info const & typeid_relational;
103 inline const relational &ex_to_relational(const ex &e)
105 return static_cast<const relational &>(*e.bp);
108 #ifndef NO_GINAC_NAMESPACE
110 #endif // ndef NO_GINAC_NAMESPACE
112 #endif // ndef __GINAC_RELATIONAL_H__