* Interface to GiNaC's special tensors. */
/*
- * GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2011 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
* 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. */
{
GINAC_DECLARE_REGISTERED_CLASS(tensor, basic)
- // other constructors
-protected:
- tensor(tinfo_t ti) : inherited(ti) {}
-
// functions overriding virtual functions from base classes
protected:
unsigned return_type() const { return return_types::noncommutative_composite; }
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
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
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; }
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
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:
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
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; }
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
} // namespace GiNaC
-#endif // ndef __GINAC_TENSOR_H__
+#endif // ndef GINAC_TENSOR_H