X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Frelational.h;h=779b1fe871e46ef1b8985fa2c4a934627a5fa1f1;hp=dcbcacc5a30bc2e36d40cc99577bca749a844f1a;hb=0025975e46fffba62c7b2b72f869b0bb1fe47e09;hpb=06eb6b761f4b9d9eed4decd8ed50d94b40b94a0e

diff --git a/ginac/relational.h b/ginac/relational.h
index dcbcacc5..779b1fe8 100644
--- a/ginac/relational.h
+++ b/ginac/relational.h
@@ -3,7 +3,7 @@
  *  Interface to relations between expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 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
@@ -49,19 +49,22 @@ public:
 public:
 	relational(const ex & lhs, const ex & rhs, operators oper=equal);
 	
-	// functions overriding virtual functions from bases classes
+	// functions overriding virtual functions from base classes
 public:
 	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 evalf(int level=0) const;
-	ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
+	ex subs(const lst & ls, const lst & lr, bool no_pattern = false) const;
 	ex simplify_ncmul(const exvector & v) const;
+
 protected:
+	bool match_same_type(const basic & other) const;
 	unsigned return_type(void) const;
 	unsigned return_type_tinfo(void) const;
+	unsigned calchash(void) const;
 
 	// new virtual functions which can be overridden by derived classes
 public:
@@ -78,13 +81,14 @@ protected:
 	ex lh;
 	ex rh;
 	operators o;
-	static unsigned precedence;
 };
 
 // utility functions
-inline const relational &ex_to_relational(const ex &e)
+
+/** Specialization of is_exactly_a<relational>(obj) for relational objects. */
+template<> inline bool is_exactly_a<relational>(const basic & obj)
 {
-	return static_cast<const relational &>(*e.bp);
+	return obj.tinfo()==TINFO_relational;
 }
 
 } // namespace GiNaC