* Interface to GiNaC's symmetry definitions. */
/*
- * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2017 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_SYMMETRY_H__
-#define __GINAC_SYMMETRY_H__
-
-#include <set>
+#ifndef GINAC_SYMMETRY_H
+#define GINAC_SYMMETRY_H
#include "ex.h"
+#include "archive.h"
-namespace GiNaC {
+#include <set>
+namespace GiNaC {
class sy_is_less;
class sy_swap;
/** Create node with two children. */
symmetry(symmetry_type t, const symmetry &c1, const symmetry &c2);
+ // functions overriding virtual functions from base classes
+public:
+ /** Save (a.k.a. serialize) object into archive. */
+ void archive(archive_node& n) const override;
+ /** Read (a.k.a. deserialize) object from archive. */
+ void read_archive(const archive_node& n, lst& syms) override;
+protected:
+ unsigned calchash() const override;
+
// non-virtual functions in this class
public:
/** Get symmetry type. */
/** Check whether this node actually represents any kind of symmetry. */
bool has_symmetry() const {return type != none || !children.empty(); }
-
+ /** Check whether this node involves anything non symmetric. */
+ bool has_nonsymmetric() const;
+ /** Check whether this node involves a cyclic symmetry. */
+ bool has_cyclic() const;
protected:
void do_print(const print_context & c, unsigned level) const;
void do_print_tree(const print_tree & c, unsigned level) const;
/** Vector of child nodes. */
exvector children;
};
+GINAC_DECLARE_UNARCHIVER(symmetry);
// global functions
* @param v Start of expression vector
* @param symm Root node of symmetry tree
* @return the overall sign introduced by the reordering (+1, -1 or 0)
- * or INT_MAX if nothing changed */
+ * or numeric_limits<int>::max() if nothing changed */
extern int canonicalize(exvector::iterator v, const symmetry &symm);
/** Symmetrize expression over a set of objects (symbols, indices). */
return antisymmetrize(e, v.begin(), v.end());
}
-/** Symmetrize expression by cyclic permuation over a set of objects
+/** Symmetrize expression by cyclic permutation over a set of objects
* (symbols, indices). */
ex symmetrize_cyclic(const ex & e, exvector::const_iterator first, exvector::const_iterator last);
} // namespace GiNaC
-#endif // ndef __GINAC_SYMMETRY_H__
+#endif // ndef GINAC_SYMMETRY_H