X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Frelational.h;h=fc559b5fafb4f297a885d0040f8fabc882af8a70;hp=48b5971996b0182cf148a272641e6dedc4777f2c;hb=eaaba68453c2863a12244a532db4455d1fc41a7a;hpb=bd2d7351b89743eb68ce7d3bfa7ab62c331f9522

diff --git a/ginac/relational.h b/ginac/relational.h
index 48b59719..fc559b5f 100644
--- a/ginac/relational.h
+++ b/ginac/relational.h
@@ -3,7 +3,7 @@
  *  Interface to relations between expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  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
@@ -26,91 +26,76 @@
 #include "basic.h"
 #include "ex.h"
 
-#ifndef NO_NAMESPACE_GINAC
 namespace GiNaC {
-#endif // ndef NO_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)
+	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
-public:
-    relational();
-    ~relational();
-    relational(const relational & other);
-    const relational & operator=(const relational & other);
-protected:
-    void copy(const relational & other);
-    void destroy(bool call_parent);
-
-    // other constructors
+	enum operators {
+		equal,
+		not_equal,
+		less,
+		less_or_equal,
+		greater,
+		greater_or_equal
+	};
+	
+	// other ctors
 public:
-    relational(const ex & lhs, const ex & rhs, operators oper=equal);
-    
-    // functions overriding virtual functions from bases classes
+	relational(const ex & lhs, const ex & rhs, operators oper=equal);
+	
+	// functions overriding virtual functions from bases classes
 public:
-    basic * duplicate() const;
-    void print(std::ostream & os, unsigned upper_precedence=0) const;
-    void printraw(std::ostream & os) const;
-    void printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence=0) const;
-    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 simplify_ncmul(const exvector & 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(const basic & 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
+	// new virtual functions which can be overridden by derived classes
 public:
-    virtual ex lhs(void) const;
-    virtual ex rhs(void) const;
+	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
-
-extern const relational some_relational;
-extern const type_info & typeid_relational;
-
 // utility functions
+
+/** Return the relational object handled by an ex.  Deprecated: use ex_to<relational>().
+ *  This is unsafe: you need to check the type first. */
 inline const relational &ex_to_relational(const ex &e)
 {
 	return static_cast<const relational &>(*e.bp);
 }
 
-#ifndef NO_NAMESPACE_GINAC
+/** 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 NO_NAMESPACE_GINAC
 
 #endif // ndef __GINAC_RELATIONAL_H__