/** @file coloridx.h
*
- * Interface to GiNaC's color indices.
- *
- * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ * Interface to GiNaC's color indices. */
+
+/*
+ * 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
#include <string>
#include <vector>
+#include "idx.h"
+#include "ex.h"
+
+namespace GiNaC {
+
+/** Class of indices for color algebra objects, to tell them apart from
+ * other index families like Lorentz indices. The color indices are the
+ * indices of the SU(3) generators T_a, so they lie in the range of 0 to 7.
+ * Note that this kind of index is different from the indices carried by
+ * elements of a specific matrix representation of su(3). Such indices are
+ * always hidden in our implementation and we are not concerned with them. */
class coloridx : public idx
{
- friend class color;
+ GINAC_DECLARE_REGISTERED_CLASS(coloridx, idx)
-// member functions
+ friend class color;
- // default constructor, destructor, copy constructor assignment operator and helpers
+ // other constructors
public:
- coloridx();
- ~coloridx();
- coloridx (coloridx const & other);
- coloridx const & operator=(coloridx const & other);
-protected:
- void copy(coloridx const & other);
- void destroy(bool call_parent);
+ explicit coloridx(bool cov);
+ explicit coloridx(const std::string & n, bool cov=false);
+ explicit coloridx(const char * n, bool cov=false);
+ explicit coloridx(unsigned v, bool cov=false);
- // other constructors
+ // functions overriding virtual functions from bases classes
public:
- explicit coloridx(bool cov);
- explicit coloridx(string const & n, bool cov=false);
- explicit coloridx(char const * n, bool cov=false);
- explicit coloridx(unsigned const v, bool cov=false);
+ 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;
- // functions overriding virtual functions from bases 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;
- bool info(unsigned inf) const;
+ // new virtual functions which can be overridden by derived classes
+ // none
- // new virtual functions which can be overridden by derived classes
- // none
+ // non-virtual functions in this class
+ // none
- // non-virtual functions in this class
- // none
-
- // member variables
- // none
+ // member variables
+ // none
};
-// global constants
-
-extern const coloridx some_coloridx;
-extern type_info const & typeid_coloridx;
-
-// macros
+// utility functions
+inline const coloridx &ex_to_coloridx(const ex &e)
+{
+ return static_cast<const coloridx &>(*e.bp);
+}
-#define ex_to_coloridx(X) (static_cast<coloridx const &>(*(X).bp))
+} // namespace GiNaC
#endif // ndef __GINAC_COLORIDX_H__