3 * Interface to GiNaC's color objects.
5 * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #ifndef __GINAC_COLOR_H__
23 #define __GINAC_COLOR_H__
27 #include <ginac/indexed.h>
29 #define MAX_REPRESENTATION_LABELS 4
30 #define COLOR_EIGHT 8 // N*N-1
31 #define COLOR_THREE 3 // N
33 /** Base class for color object */
34 class color : public indexed
38 friend color color_ONE(unsigned const rl);
39 friend color color_T(ex const & a, unsigned const rl);
40 friend color color_f(ex const & a, ex const & b, ex const & c);
41 friend color color_d(ex const & a, ex const & b, ex const & c);
42 friend ex color_h(ex const & a, ex const & b, ex const & c);
43 friend color color_delta8(ex const & a, ex const & b);
44 friend unsigned subs_index_in_exvector(exvector & v, ex const & is, ex const & ir);
45 friend void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
46 exvector & fvec, exvector & dvec,
47 vector<exvector> & Tvecs,
48 vector<exvector> & ONEvecs,
49 exvector & unknownvec);
50 friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
51 exvector & dvec, vector<exvector> & Tvecs,
52 vector<exvector> & ONEvecs, exvector & unknownvec);
53 friend ex color_trace_of_one_representation_label(exvector const & v);
54 friend ex color_trace(exvector const & v, unsigned const rl);
55 friend ex simplify_pure_color_string(ex const & e);
56 friend ex simplify_color(ex const & e);
62 typedef enum { invalid, // not properly constructed by one of the friend functions
72 // default constructor, destructor, copy constructor assignment operator and helpers
76 color(color const & other);
77 color const & operator=(color const & other);
79 void copy(color const & other);
80 void destroy(bool call_parent);
84 color(color_types const t, unsigned const rl=0);
85 color(color_types const t, ex const & i1, unsigned const rl=0);
86 color(color_types const t, ex const & i1, ex const & i2, unsigned const rl=0);
87 color(color_types const t, ex const & i1, ex const & i2, ex const & i3,
89 color(color_types const t, exvector const & iv, unsigned const rl=0);
90 color(color_types const t, exvector * ivp, unsigned const rl=0);
92 // functions overriding virtual functions from base classes
94 basic * duplicate() const;
95 void printraw(ostream & os) const;
96 void printtree(ostream & os, unsigned indent) const;
97 void print(ostream & os, unsigned upper_precedence=0) const;
98 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
99 bool info(unsigned inf) const;
100 ex eval(int level=0) const;
102 int compare_same_type(basic const & other) const;
103 bool is_equal_same_type(basic const & other) const;
104 ex simplify_ncmul(exvector const & v) const;
105 ex thisexprseq(exvector const & v) const;
106 ex thisexprseq(exvector * vp) const;
108 // new virtual functions which can be overridden by derived classes
111 // non-virtual functions in this class
113 bool all_of_type_coloridx(void) const;
119 unsigned representation_label; // to distiguish independent color matrices coming from separated fermion lines
124 extern const color some_color;
125 extern type_info const & typeid_color;
129 #define ex_to_color(X) static_cast<color const &>(*(X).bp)
130 #define ex_to_nonconst_color(X) static_cast<color &>(*(X).bp)
132 color color_ONE(unsigned const rl=0);
133 color color_T(ex const & a, unsigned const rl=0);
134 color color_f(ex const & a, ex const & b, ex const & c);
135 color color_d(ex const & a, ex const & b, ex const & c);
136 ex color_h(ex const & a, ex const & b, ex const & c);
137 color color_delta8(ex const & a, ex const & b);
138 void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
139 exvector & fvec, exvector & dvec,
140 vector<exvector> & Tvecs,
141 vector<exvector> & ONEvecs,
142 exvector & unknownvec);
143 exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
144 exvector & dvec, vector<exvector> & Tvecs,
145 vector<exvector> & ONEvecs, exvector & unknownvec);
146 ex color_trace_of_one_representation_label(exvector const & v);
147 ex color_trace(exvector const & v, unsigned const rl=0);
148 ex simplify_pure_color_string(ex const & e);
149 ex simplify_color(ex const & e);
151 ex brute_force_sum_color_indices(ex const & e);
153 void append_exvector_to_exvector(exvector & dest, exvector const & source);
155 #endif // ndef __GINAC_COLOR_H__