X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Frelational.h;h=fb1111580a4afb085a12ea9017aedfc98345e18e;hb=9bf900398c9e10c1cd486377038c24f9410fcb08;hp=34c592cffd8d6bf7c4fcb3d6327d42b63dfead8e;hpb=6b3768e8c544739ae53321539cb4d1e3112ded1b;p=ginac.git

diff --git a/ginac/relational.h b/ginac/relational.h
index 34c592cf..fb111158 100644
--- a/ginac/relational.h
+++ b/ginac/relational.h
@@ -2,84 +2,93 @@
  *
  *  Interface to relations between expressions. */
 
-#ifndef _RELATIONAL_H_
-#define _RELATIONAL_H_
+/*
+ *  GiNaC Copyright (C) 1999-2001 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
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  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
+ */
 
-class relational;
+#ifndef __GINAC_RELATIONAL_H__
+#define __GINAC_RELATIONAL_H__
 
 #include "basic.h"
+#include "ex.h"
+
+namespace GiNaC {
 
 /** This class holds a relation consisting of two expressions and a logical
  *  relation between them. */
 class relational : public basic
 {
+	GINAC_DECLARE_REGISTERED_CLASS(relational, basic)
 
 // types
 public:
-    enum operators { equal,
-           not_equal,
-           less,
-           less_or_equal,
-           greater,
-           greater_or_equal
-    };
-    
-// member functions
-
-    // default constructor, destructor, copy constructor assignment operator and helpers
+	enum operators {
+		equal,
+		not_equal,
+		less,
+		less_or_equal,
+		greater,
+		greater_or_equal
+	};
+	
+	// other ctors
 public:
-    relational();
-    ~relational();
-    relational(relational const & other);
-    relational const & operator=(relational const & other);
-protected:
-    void copy(relational const & other);
-    void destroy(bool call_parent);
-
-    // other constructors
+	relational(const ex & lhs, const ex & rhs, operators oper=equal);
+	
+	// functions overriding virtual functions from base classes
 public:
-    relational(ex const & lhs, ex const & rhs, operators oper=equal);
-    
-    // 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;
-    bool info(unsigned inf) const;
-    int nops() const;
-    ex & let_op(int const i);
-    ex eval(int level=0) const;
-    ex evalf(int level=0) const;
-    ex simplify_ncmul(exvector const & v) const;
+	void print(const print_context & c, unsigned level = 0) const;
+	unsigned precedence(void) const {return 20;}
+	bool info(unsigned inf) const;
+	unsigned nops() const;
+	ex & let_op(int i);
+	ex eval(int level=0) const;
+	ex simplify_ncmul(const exvector & v) const;
+
 protected:
-    int compare_same_type(basic const & other) const;
-    unsigned return_type(void) const;
-    unsigned return_type_tinfo(void) const;
+	bool match_same_type(const basic & other) const;
+	unsigned return_type(void) const;
+	unsigned return_type_tinfo(void) const;
 
-    // new virtual functions which can be overridden by derived classes
-    // none
+	// new virtual functions which can be overridden by derived classes
+public:
+	virtual ex lhs(void) const;
+	virtual ex rhs(void) const;
 
-    // non-virtual functions in this class
+	// non-virtual functions in this class
 public:
-    operator bool(void) const;
-    
+	operator bool(void) const;
+	
 // member variables
-    
+	
 protected:
-    ex lh;
-    ex rh;
-    operators o;
-    static unsigned precedence;
+	ex lh;
+	ex rh;
+	operators o;
 };
 
-// global constants
+// utility functions
 
-extern const relational some_relational;
-extern type_info const & typeid_relational;
-
-#define ex_to_relational(X) static_cast<relational const &>(*(X).bp)
-
-#endif // ndef _RELATIONAL_H_
+/** Specialization of is_exactly_a<relational>(obj) for relational objects. */
+template<> inline bool is_exactly_a<relational>(const basic & obj)
+{
+	return obj.tinfo()==TINFO_relational;
+}
 
+} // namespace GiNaC
 
+#endif // ndef __GINAC_RELATIONAL_H__