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>
31 #ifndef NO_GINAC_NAMESPACE
33 #endif // ndef NO_GINAC_NAMESPACE
35 const unsigned MAX_REPRESENTATION_LABELS = 4;
36 const unsigned COLOR_EIGHT = 8; // N*N-1
37 const unsigned COLOR_THREE = 3; // N
39 /** Base class for color object */
40 class color : public indexed
44 friend color color_ONE(unsigned const rl);
45 friend color color_T(ex const & a, unsigned const rl);
46 friend color color_f(ex const & a, ex const & b, ex const & c);
47 friend color color_d(ex const & a, ex const & b, ex const & c);
48 friend ex color_h(ex const & a, ex const & b, ex const & c);
49 friend color color_delta8(ex const & a, ex const & b);
50 friend unsigned subs_index_in_exvector(exvector & v, ex const & is, ex const & ir);
51 friend void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
52 exvector & fvec, exvector & dvec,
53 vector<exvector> & Tvecs,
54 vector<exvector> & ONEvecs,
55 exvector & unknownvec);
56 friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
57 exvector & dvec, vector<exvector> & Tvecs,
58 vector<exvector> & ONEvecs, exvector & unknownvec);
59 friend ex color_trace_of_one_representation_label(exvector const & v);
60 friend ex color_trace(exvector const & v, unsigned const rl);
61 friend ex simplify_pure_color_string(ex const & e);
62 friend ex simplify_color(ex const & e);
68 typedef enum { invalid, // not properly constructed by one of the friend functions
78 // default constructor, destructor, copy constructor assignment operator and helpers
82 color(color const & other);
83 color const & operator=(color const & other);
85 void copy(color const & other);
86 void destroy(bool call_parent);
90 color(color_types const t, unsigned const rl=0);
91 color(color_types const t, ex const & i1, unsigned const rl=0);
92 color(color_types const t, ex const & i1, ex const & i2, unsigned const rl=0);
93 color(color_types const t, ex const & i1, ex const & i2, ex const & i3,
95 color(color_types const t, exvector const & iv, unsigned const rl=0);
96 color(color_types const t, exvector * ivp, unsigned const rl=0);
98 // functions overriding virtual functions from base classes
100 basic * duplicate() const;
101 void printraw(ostream & os) const;
102 void printtree(ostream & os, unsigned indent) const;
103 void print(ostream & os, unsigned upper_precedence=0) const;
104 void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
105 bool info(unsigned inf) const;
106 ex eval(int level=0) const;
108 int compare_same_type(basic const & other) const;
109 bool is_equal_same_type(basic const & other) const;
110 ex simplify_ncmul(exvector const & v) const;
111 ex thisexprseq(exvector const & v) const;
112 ex thisexprseq(exvector * vp) const;
114 // new virtual functions which can be overridden by derived classes
117 // non-virtual functions in this class
119 bool all_of_type_coloridx(void) const;
125 unsigned representation_label; // to distiguish independent color matrices coming from separated fermion lines
130 extern const color some_color;
131 extern type_info const & typeid_color;
134 inline const color &ex_to_color(const ex &e)
136 return static_cast<const color &>(*e.bp);
139 inline color &ex_to_nonconst_color(const ex &e)
141 return static_cast<color &>(*e.bp);
144 color color_ONE(unsigned const rl=0);
145 color color_T(ex const & a, unsigned const rl=0);
146 color color_f(ex const & a, ex const & b, ex const & c);
147 color color_d(ex const & a, ex const & b, ex const & c);
148 ex color_h(ex const & a, ex const & b, ex const & c);
149 color color_delta8(ex const & a, ex const & b);
150 void split_color_string_in_parts(exvector const & v, exvector & delta8vec,
151 exvector & fvec, exvector & dvec,
152 vector<exvector> & Tvecs,
153 vector<exvector> & ONEvecs,
154 exvector & unknownvec);
155 exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
156 exvector & dvec, vector<exvector> & Tvecs,
157 vector<exvector> & ONEvecs, exvector & unknownvec);
158 ex color_trace_of_one_representation_label(exvector const & v);
159 ex color_trace(exvector const & v, unsigned const rl=0);
160 ex simplify_pure_color_string(ex const & e);
161 ex simplify_color(ex const & e);
163 ex brute_force_sum_color_indices(ex const & e);
165 void append_exvector_to_exvector(exvector & dest, exvector const & source);
167 #ifndef NO_GINAC_NAMESPACE
169 #endif // ndef NO_GINAC_NAMESPACE
171 #endif // ndef __GINAC_COLOR_H__