* Interface to GiNaC's clifford objects. */
/*
- * 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
#define __GINAC_CLIFFORD_H__
#include <string>
-#include "indexed.h"
-#include "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(const clifford & other);
- const clifford & operator=(const clifford & other);
-protected:
- void copy(const clifford & other);
- void destroy(bool call_parent);
+// friends
- // other constructors
-public:
- explicit clifford(const string & 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(const basic & other) const;
- ex simplify_ncmul(const exvector & 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(const string & 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 const type_info & 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__