+++ /dev/null
-/** @file lorentzidx.h
- *
- * Interface to GiNaC's Lorentz indices. */
-
-/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef __GINAC_LORENTZIDX_H__
-#define __GINAC_LORENTZIDX_H__
-
-#include <string>
-#include <vector>
-#include "idx.h"
-
-namespace GiNaC {
-
-
-/** Class of indices for Lorentz tensors, to tell them apart from other
- * index families like color indices. The indices of this class also
- * support the case of P-O-decomposed D-dimensional spacetime, where the
- * parallel space is a Minkowski space with integral dimension P and the
- * orthogonal space is a Euclidean space with (possibly complex) dimension
- * D-P. The dimension D of spacetime is represented by the global symbol
- * that is returned by the Dim() function. */
-class lorentzidx : public idx
-{
- GINAC_DECLARE_REGISTERED_CLASS(lorentzidx, idx)
-
- friend class simp_lor;
- friend class scalar_products;
-
-// member functions
-
- // other constructors
-public:
- explicit lorentzidx(bool cov, bool oonly=false, unsigned dimp=0);
- explicit lorentzidx(const std::string & n, bool cov=false,
- bool oonly=false, unsigned dimp=0);
- explicit lorentzidx(const char * n, bool cov=false,
- bool oonly=false, unsigned dimp=0);
- explicit lorentzidx(unsigned v, bool cov=false);
-
- // functions overriding virtual functions from bases classes
-public:
- void printraw(std::ostream & os) const;
- void printtree(std::ostream & os, unsigned indent) const;
- void print(std::ostream & os, unsigned upper_precedence=0) const;
- bool info(unsigned inf) const;
-
- // new virtual functions which can be overridden by derived classes
- // none
-
- // non-virtual functions in this class
-public:
- /** Check whether index only lives in orthogonal space. */
- bool is_orthogonal_only(void) const {return orthogonal_only;}
-
- /** Return dimension of parallel space. */
- unsigned get_dim_parallel_space(void) const {return dim_parallel_space;}
-
- lorentzidx create_anonymous_representative(void) const;
-
- // member variables
-protected:
- bool orthogonal_only; /**< Symbolic index only lives in orthogonal space? */
- unsigned dim_parallel_space; /**< Dimension of parallel space */
-};
-
-// utility functions
-inline const lorentzidx &ex_to_lorentzidx(const ex &e)
-{
- return static_cast<const lorentzidx &>(*e.bp);
-}
-
-ex Dim(void);
-
-} // namespace GiNaC
-
-#endif // ndef __GINAC_LORENTZIDX_H__