3 * Interface to GiNaC's lorentz indices. */
6 * GiNaC Copyright (C) 1999-2000 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>
30 #ifndef NO_GINAC_NAMESPACE
32 #endif // ndef NO_GINAC_NAMESPACE
34 class lorentzidx : public idx
36 friend class simp_lor;
37 friend class scalar_products;
41 // default constructor, destructor, copy constructor assignment operator and helpers
45 lorentzidx (lorentzidx const & other);
46 lorentzidx const & operator=(lorentzidx const & other);
48 void copy(lorentzidx const & other);
49 void destroy(bool call_parent);
53 explicit lorentzidx(bool cov, bool oonly=false, unsigned dimp=0);
54 explicit lorentzidx(string const & n, bool cov=false,
55 bool oonly=false, unsigned dimp=0);
56 explicit lorentzidx(char const * n, bool cov=false,
57 bool oonly=false, unsigned dimp=0);
58 explicit lorentzidx(unsigned const v, bool cov=false);
60 // functions overriding virtual functions from bases classes
62 basic * duplicate() const;
63 void printraw(ostream & os) const;
64 void printtree(ostream & os, unsigned indent) const;
65 void print(ostream & os, unsigned upper_precedence=0) const;
66 bool info(unsigned inf) const;
68 // new virtual functions which can be overridden by derived classes
71 // non-virtual functions in this class
73 bool is_orthogonal_only(void) const { return orthogonal_only; }
74 unsigned get_dim_parallel_space(void) const { return dim_parallel_space; }
75 lorentzidx create_anonymous_representative(void) const;
80 unsigned dim_parallel_space;
85 extern const lorentzidx some_lorentzidx;
86 extern type_info const & typeid_lorentzidx;
89 inline const lorentzidx &ex_to_lorentzidx(const ex &e)
91 return static_cast<const lorentzidx &>(*e.bp);
94 #ifndef NO_GINAC_NAMESPACE
96 #endif // ndef NO_GINAC_NAMESPACE
98 #endif // ndef __GINAC_LORENTZIDX_H__