3 * Interface to GiNaC's color objects. */
6 * GiNaC Copyright (C) 1999 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_COLOR_H__
24 #define __GINAC_COLOR_H__
28 #include <ginac/indexed.h>
33 const int MAX_REPRESENTATION_LABELS = 4;
34 const int COLOR_EIGHT = 8; // N*N-1
35 const int COLOR_THREE = 3; // N
37 /** Base class for color object */
38 class color : public indexed
42 friend color color_ONE(unsigned const rl);
43 friend color color_T(ex const & a, unsigned const rl);
44 friend color color_f(ex const & a, ex const & b, ex const & c);
45 friend color color_d(ex const & a, ex const & b, ex const & c);
46 friend ex color_h(ex const & a, ex const & b, ex const & c);
47 friend color color_delta8(ex const & a, ex const & b);
48 friend unsigned subs_index_in_exvector(exvector & v, ex const & is, ex const & ir);
49 friend void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
50 exvector & fvec, exvector & dvec,
51 vector<exvector> & Tvecs,
52 vector<exvector> & ONEvecs,
53 exvector & unknownvec);
54 friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
55 exvector & dvec, vector<exvector> & Tvecs,
56 vector<exvector> & ONEvecs, exvector & unknownvec);
57 friend ex color_trace_of_one_representation_label(exvector const & v);
58 friend ex color_trace(exvector const & v, unsigned const rl);
59 friend ex simplify_pure_color_string(ex const & e);
60 friend ex simplify_color(ex const & e);
66 typedef enum { invalid, // not properly constructed by one of the friend functions
76 // default constructor, destructor, copy constructor assignment operator and helpers
80 color(color const & other);
81 color const & operator=(color const & other);
83 void copy(color const & other);
84 void destroy(bool call_parent);
88 color(color_types const t, unsigned const rl=0);
89 color(color_types const t, ex const & i1, unsigned const rl=0);
90 color(color_types const t, ex const & i1, ex const & i2, unsigned const rl=0);
91 color(color_types const t, ex const & i1, ex const & i2, ex const & i3,
93 color(color_types const t, exvector const & iv, unsigned const rl=0);
94 color(color_types const t, exvector * ivp, unsigned const rl=0);
96 // functions overriding virtual functions from base classes
98 basic * duplicate() const;
99 void printraw(ostream & os) const;
100 void printtree(ostream & os, unsigned indent) const;
101 void print(ostream & os, unsigned upper_precedence=0) const;
102 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
103 bool info(unsigned inf) const;
104 ex eval(int level=0) const;
106 int compare_same_type(basic const & other) const;
107 bool is_equal_same_type(basic const & other) const;
108 ex simplify_ncmul(exvector const & v) const;
109 ex thisexprseq(exvector const & v) const;
110 ex thisexprseq(exvector * vp) const;
112 // new virtual functions which can be overridden by derived classes
115 // non-virtual functions in this class
117 bool all_of_type_coloridx(void) const;
123 unsigned representation_label; // to distiguish independent color matrices coming from separated fermion lines
128 extern const color some_color;
129 extern type_info const & typeid_color;
132 inline const color &ex_to_color(const ex &e)
134 return static_cast<const color &>(*e.bp);
137 inline color &ex_to_nonconst_color(const ex &e)
139 return static_cast<color &>(*e.bp);
142 color color_ONE(unsigned const rl=0);
143 color color_T(ex const & a, unsigned const rl=0);
144 color color_f(ex const & a, ex const & b, ex const & c);
145 color color_d(ex const & a, ex const & b, ex const & c);
146 ex color_h(ex const & a, ex const & b, ex const & c);
147 color color_delta8(ex const & a, ex const & b);
148 void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
149 exvector & fvec, exvector & dvec,
150 vector<exvector> & Tvecs,
151 vector<exvector> & ONEvecs,
152 exvector & unknownvec);
153 exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
154 exvector & dvec, vector<exvector> & Tvecs,
155 vector<exvector> & ONEvecs, exvector & unknownvec);
156 ex color_trace_of_one_representation_label(exvector const & v);
157 ex color_trace(exvector const & v, unsigned const rl=0);
158 ex simplify_pure_color_string(ex const & e);
159 ex simplify_color(ex const & e);
161 ex brute_force_sum_color_indices(ex const & e);
163 void append_exvector_to_exvector(exvector & dest, exvector const & source);
167 #endif // ndef __GINAC_COLOR_H__