X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Ftensor.h;h=0a24f6a087a294db44e1441a0d5bf5fcc45d339c;hp=712ec7e131539ce8aaf3c92e815f52486521d1a0;hb=5d6d2c3ff6afd13933203f984a818dbfc76db3a1;hpb=68fdf425abf14d016d5f95ee7b9d06a19a3c5926 diff --git a/ginac/tensor.h b/ginac/tensor.h index 712ec7e1..0a24f6a0 100644 --- a/ginac/tensor.h +++ b/ginac/tensor.h @@ -3,7 +3,7 @@ * Interface to GiNaC's special tensors. */ /* - * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2010 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 @@ -17,17 +17,17 @@ * * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#ifndef __GINAC_TENSOR_H__ -#define __GINAC_TENSOR_H__ +#ifndef GINAC_TENSOR_H +#define GINAC_TENSOR_H #include "ex.h" +#include "archive.h" namespace GiNaC { - /** This class holds one of GiNaC's predefined special tensors such as the * delta and the metric tensors. They are represented without indices. * To attach indices to them, wrap them in an object of class indexed. */ @@ -35,10 +35,6 @@ class tensor : public basic { GINAC_DECLARE_REGISTERED_CLASS(tensor, basic) - // other constructors -protected: - tensor(unsigned ti) : inherited(ti) {} - // functions overriding virtual functions from base classes protected: unsigned return_type() const { return return_types::noncommutative_composite; } @@ -60,10 +56,17 @@ class tensdelta : public tensor // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool info(unsigned inf) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + + // non-virtual functions in this class +protected: + unsigned return_type() const { return return_types::commutative; } + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; +GINAC_DECLARE_UNARCHIVER(tensdelta); /** This class represents a general metric tensor which can be used to @@ -75,10 +78,16 @@ class tensmetric : public tensor // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool info(unsigned inf) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + + // non-virtual functions in this class +protected: + unsigned return_type() const { return return_types::commutative; } + void do_print(const print_context & c, unsigned level) const; }; +GINAC_DECLARE_UNARCHIVER(tensmetric); /** This class represents a Minkowski metric tensor. It has all the @@ -95,13 +104,24 @@ public: // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool info(unsigned inf) const; ex eval_indexed(const basic & i) const; + /** Save (a.k.a. serialize) object into archive. */ + void archive(archive_node& n) const; + /** Read (a.k.a. deserialize) object from archive. */ + void read_archive(const archive_node& n, lst& syms); + // non-virtual functions in this class +protected: + unsigned return_type() const { return return_types::commutative; } + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; + // member variables private: bool pos_sig; /**< If true, the metric is diag(-1,1,1...). Otherwise it is diag(1,-1,-1,...). */ }; +GINAC_DECLARE_UNARCHIVER(minkmetric); /** This class represents an antisymmetric spinor metric tensor which @@ -114,10 +134,15 @@ class spinmetric : public tensmetric // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool info(unsigned inf) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + +protected: + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; +GINAC_DECLARE_UNARCHIVER(spinmetric); /** This class represents the totally antisymmetric epsilon tensor. If @@ -133,15 +158,26 @@ public: // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool info(unsigned inf) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + /** Save (a.k.a. serialize) object into archive. */ + void archive(archive_node& n) const; + /** Read (a.k.a. deserialize) object from archive. */ + void read_archive(const archive_node& n, lst& syms); + // non-virtual functions in this class +protected: + unsigned return_type() const { return return_types::commutative; } + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; + // member variables private: bool minkowski; /**< If true, tensor is in Minkowski-type space. Otherwise it is in a Euclidean space. */ bool pos_sig; /**< If true, the metric is assumed to be diag(-1,1,1...). Otherwise it is diag(1,-1,-1,...). This is only relevant if minkowski = true. */ }; +GINAC_DECLARE_UNARCHIVER(tensepsilon); // utility functions @@ -215,4 +251,4 @@ ex lorentz_eps(const ex & i1, const ex & i2, const ex & i3, const ex & i4, bool } // namespace GiNaC -#endif // ndef __GINAC_TENSOR_H__ +#endif // ndef GINAC_TENSOR_H