3 * Interface to GiNaC's lorentz indices. */
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_LORENTZIDX_H__
24 #define __GINAC_LORENTZIDX_H__
28 #include <ginac/idx.h>
32 class lorentzidx : public idx
34 friend class simp_lor;
35 friend class scalar_products;
39 // default constructor, destructor, copy constructor assignment operator and helpers
43 lorentzidx (lorentzidx const & other);
44 lorentzidx const & operator=(lorentzidx const & other);
46 void copy(lorentzidx const & other);
47 void destroy(bool call_parent);
51 explicit lorentzidx(bool cov, bool oonly=false, unsigned dimp=0);
52 explicit lorentzidx(string const & n, bool cov=false,
53 bool oonly=false, unsigned dimp=0);
54 explicit lorentzidx(char const * n, bool cov=false,
55 bool oonly=false, unsigned dimp=0);
56 explicit lorentzidx(unsigned const v, bool cov=false);
58 // functions overriding virtual functions from bases classes
60 basic * duplicate() const;
61 void printraw(ostream & os) const;
62 void printtree(ostream & os, unsigned indent) const;
63 void print(ostream & os, unsigned upper_precedence=0) const;
64 bool info(unsigned inf) const;
66 // new virtual functions which can be overridden by derived classes
69 // non-virtual functions in this class
71 bool is_orthogonal_only(void) const { return orthogonal_only; }
72 unsigned get_dim_parallel_space(void) const { return dim_parallel_space; }
73 lorentzidx create_anonymous_representative(void) const;
78 unsigned dim_parallel_space;
83 extern const lorentzidx some_lorentzidx;
84 extern type_info const & typeid_lorentzidx;
87 inline const lorentzidx &ex_to_lorentzidx(const ex &e)
89 return static_cast<const lorentzidx &>(*e.bp);
94 #endif // ndef __GINAC_LORENTZIDX_H__