3 * Interface to GiNaC's color indices. */
6 * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef __GINAC_COLORIDX_H__
24 #define __GINAC_COLORIDX_H__
34 /** Class of indices for color algebra objects, to tell them apart from
35 * other index families like Lorentz indices. The color indices are the
36 * indices of the SU(3) generators T_a, so they lie in the range of 0 to 7.
37 * Note that this kind of index is different from the indices carried by
38 * elements of a specific matrix representation of su(3). Such indices are
39 * always hidden in our implementation and we are not concerned with them. */
40 class coloridx : public idx
42 GINAC_DECLARE_REGISTERED_CLASS(coloridx, idx)
48 explicit coloridx(bool cov);
49 explicit coloridx(const std::string & n, bool cov=false);
50 explicit coloridx(const char * n, bool cov=false);
51 explicit coloridx(unsigned v, bool cov=false);
53 // functions overriding virtual functions from bases classes
55 void printraw(std::ostream & os) const;
56 void printtree(std::ostream & os, unsigned indent) const;
57 void print(std::ostream & os, unsigned upper_precedence=0) const;
58 bool info(unsigned inf) const;
60 // new virtual functions which can be overridden by derived classes
63 // non-virtual functions in this class
71 inline const coloridx &ex_to_coloridx(const ex &e)
73 return static_cast<const coloridx &>(*e.bp);
78 #endif // ndef __GINAC_COLORIDX_H__