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>
30 #define MAX_REPRESENTATION_LABELS 4
31 #define COLOR_EIGHT 8 // N*N-1
32 #define COLOR_THREE 3 // N
34 /** Base class for color object */
35 class color : public indexed
39 friend color color_ONE(unsigned const rl);
40 friend color color_T(ex const & a, unsigned const rl);
41 friend color color_f(ex const & a, ex const & b, ex const & c);
42 friend color color_d(ex const & a, ex const & b, ex const & c);
43 friend ex color_h(ex const & a, ex const & b, ex const & c);
44 friend color color_delta8(ex const & a, ex const & b);
45 friend unsigned subs_index_in_exvector(exvector & v, ex const & is, ex const & ir);
46 friend void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
47 exvector & fvec, exvector & dvec,
48 vector<exvector> & Tvecs,
49 vector<exvector> & ONEvecs,
50 exvector & unknownvec);
51 friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
52 exvector & dvec, vector<exvector> & Tvecs,
53 vector<exvector> & ONEvecs, exvector & unknownvec);
54 friend ex color_trace_of_one_representation_label(exvector const & v);
55 friend ex color_trace(exvector const & v, unsigned const rl);
56 friend ex simplify_pure_color_string(ex const & e);
57 friend ex simplify_color(ex const & e);
63 typedef enum { invalid, // not properly constructed by one of the friend functions
73 // default constructor, destructor, copy constructor assignment operator and helpers
77 color(color const & other);
78 color const & operator=(color const & other);
80 void copy(color const & other);
81 void destroy(bool call_parent);
85 color(color_types const t, unsigned const rl=0);
86 color(color_types const t, ex const & i1, unsigned const rl=0);
87 color(color_types const t, ex const & i1, ex const & i2, unsigned const rl=0);
88 color(color_types const t, ex const & i1, ex const & i2, ex const & i3,
90 color(color_types const t, exvector const & iv, unsigned const rl=0);
91 color(color_types const t, exvector * ivp, unsigned const rl=0);
93 // functions overriding virtual functions from base classes
95 basic * duplicate() const;
96 void printraw(ostream & os) const;
97 void printtree(ostream & os, unsigned indent) const;
98 void print(ostream & os, unsigned upper_precedence=0) const;
99 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
100 bool info(unsigned inf) const;
101 ex eval(int level=0) const;
103 int compare_same_type(basic const & other) const;
104 bool is_equal_same_type(basic const & other) const;
105 ex simplify_ncmul(exvector const & v) const;
106 ex thisexprseq(exvector const & v) const;
107 ex thisexprseq(exvector * vp) const;
109 // new virtual functions which can be overridden by derived classes
112 // non-virtual functions in this class
114 bool all_of_type_coloridx(void) const;
120 unsigned representation_label; // to distiguish independent color matrices coming from separated fermion lines
125 extern const color some_color;
126 extern type_info const & typeid_color;
130 #define ex_to_color(X) static_cast<color const &>(*(X).bp)
131 #define ex_to_nonconst_color(X) static_cast<color &>(*(X).bp)
133 color color_ONE(unsigned const rl=0);
134 color color_T(ex const & a, unsigned const rl=0);
135 color color_f(ex const & a, ex const & b, ex const & c);
136 color color_d(ex const & a, ex const & b, ex const & c);
137 ex color_h(ex const & a, ex const & b, ex const & c);
138 color color_delta8(ex const & a, ex const & b);
139 void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
140 exvector & fvec, exvector & dvec,
141 vector<exvector> & Tvecs,
142 vector<exvector> & ONEvecs,
143 exvector & unknownvec);
144 exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
145 exvector & dvec, vector<exvector> & Tvecs,
146 vector<exvector> & ONEvecs, exvector & unknownvec);
147 ex color_trace_of_one_representation_label(exvector const & v);
148 ex color_trace(exvector const & v, unsigned const rl=0);
149 ex simplify_pure_color_string(ex const & e);
150 ex simplify_color(ex const & e);
152 ex brute_force_sum_color_indices(ex const & e);
154 void append_exvector_to_exvector(exvector & dest, exvector const & source);
156 #endif // ndef __GINAC_COLOR_H__