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__
30 #ifndef NO_NAMESPACE_GINAC
32 #endif // ndef NO_NAMESPACE_GINAC
34 class lorentzidx : public idx
36 GINAC_DECLARE_REGISTERED_CLASS(lorentzidx, idx)
38 friend class simp_lor;
39 friend class scalar_products;
43 // default constructor, destructor, copy constructor assignment operator and helpers
47 lorentzidx (const lorentzidx & other);
48 const lorentzidx & operator=(const lorentzidx & other);
50 void copy(const lorentzidx & other);
51 void destroy(bool call_parent);
55 explicit lorentzidx(bool cov, bool oonly=false, unsigned dimp=0);
56 explicit lorentzidx(const string & n, bool cov=false,
57 bool oonly=false, unsigned dimp=0);
58 explicit lorentzidx(const char * n, bool cov=false,
59 bool oonly=false, unsigned dimp=0);
60 explicit lorentzidx(unsigned v, bool cov=false);
62 // functions overriding virtual functions from bases classes
64 basic * duplicate() const;
65 void printraw(ostream & os) const;
66 void printtree(ostream & os, unsigned indent) const;
67 void print(ostream & os, unsigned upper_precedence=0) const;
68 bool info(unsigned inf) const;
70 // new virtual functions which can be overridden by derived classes
73 // non-virtual functions in this class
75 bool is_orthogonal_only(void) const { return orthogonal_only; }
76 unsigned get_dim_parallel_space(void) const { return dim_parallel_space; }
77 lorentzidx create_anonymous_representative(void) const;
82 unsigned dim_parallel_space;
87 extern const lorentzidx some_lorentzidx;
88 extern const type_info & typeid_lorentzidx;
91 inline const lorentzidx &ex_to_lorentzidx(const ex &e)
93 return static_cast<const lorentzidx &>(*e.bp);
96 #ifndef NO_NAMESPACE_GINAC
98 #endif // ndef NO_NAMESPACE_GINAC
100 #endif // ndef __GINAC_LORENTZIDX_H__