* New funny timing added: compute an antipode in Yukawa theory.

[ginac.git] / ginac / clifford.h

diff --git a/ginac/clifford.h b/ginac/clifford.h
index 3302f461505e9a78c4be7a97e30c40216adba74a..86978e98b3846cac2bee5507b1b247f5c1f744ec 100644 (file)
--- a/ginac/clifford.h
+++ b/ginac/clifford.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's clifford objects. */
 
 /*
- *  GiNaC Copyright (C) 1999 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
@@ -24,76 +24,59 @@
 #define __GINAC_CLIFFORD_H__
 
 #include <string>
-#include <ginac/indexed.h>
-#include <ginac/ex.h>
+#include "lortensor.h"
 
-#ifndef NO_GINAC_NAMESPACE
 namespace GiNaC {
-#endif // ndef NO_GINAC_NAMESPACE
 
-/** Base class for clifford object */
-class clifford : public indexed
+
+/** This class holds an object representing an element of the Clifford
+ *  algebra (the Dirac gamma matrices). These objects only carry Lorentz
+ *  indices. Spinor indices are always hidden in our implementation. */
+class clifford : public lortensor
 {
-// member functions
+       GINAC_DECLARE_REGISTERED_CLASS(clifford, lortensor)
 
-    // default constructor, destructor, copy constructor assignment operator and helpers
-public:
-    clifford();
-    ~clifford();
-    clifford(clifford const & other);
-    clifford const & operator=(clifford const & other);
-protected:
-    void copy(clifford const & other); 
-    void destroy(bool call_parent);
+// friends
 
-    // other constructors
-public:
-    explicit clifford(string const & initname);
+       friend clifford clifford_gamma(const ex & mu);
 
-    // functions overriding virtual functions from base classes
-public:
-    basic * duplicate() const;
-    void printraw(ostream & os) const;
-    void printtree(ostream & os, unsigned indent) 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;
-protected:
-    int compare_same_type(basic const & other) const;
-    ex simplify_ncmul(exvector const & v) const;
-    unsigned calchash(void) const;
-
-    // new virtual functions which can be overridden by derived classes
-    // none
-    
-    // non-virtual functions in this class
+       // other constructors
 public:
-    void setname(string const & n);
-private:
-    string & autoname_prefix(void);
-
-// member variables
+       clifford(const std::string & n, const ex & mu);
+       clifford(const std::string & n, const exvector & iv);
+       clifford(const std::string & n, exvector * ivp);
 
+       // functions overriding virtual functions from base classes
+public:
+       void printraw(std::ostream & os) const;
+       void printtree(std::ostream & os, unsigned indent) const;
+       void print(std::ostream & os, unsigned upper_precedence=0) const;
+       bool info(unsigned inf) const;
+       // ex eval(int level=0) const;
 protected:
-    string name;
-    unsigned serial; // unique serial number for comparision
-private:
-    static unsigned next_serial;
+       bool is_equal_same_type(const basic & other) const;
+       ex simplify_ncmul(const exvector & v) const;
+       ex thisexprseq(const exvector & v) const;
+       ex thisexprseq(exvector * vp) const;
+
+       // new virtual functions which can be overridden by derived classes
+       // none
+       
+       // non-virtual functions in this class
+       // none
+
+       // member variables
+       // none
 };
 
-// global constants
-
-extern const clifford some_clifford;
-extern type_info const & typeid_clifford;
-
-// utility functions
+// global functions
 inline const clifford &ex_to_clifford(const ex &e)
 {
        return static_cast<const clifford &>(*e.bp);
 }
 
-#ifndef NO_GINAC_NAMESPACE
+clifford clifford_gamma(const ex & mu);
+
 } // namespace GiNaC
-#endif // ndef NO_GINAC_NAMESPACE
 
 #endif // ndef __GINAC_CLIFFORD_H__