* Interface to GiNaC's symmetry definitions. */
/*
- * GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2006 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
*
* 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_SYMMETRY_H__
protected:
void do_print(const print_context & c, unsigned level) const;
void do_print_tree(const print_tree & c, unsigned level) const;
+ unsigned calchash() const;
// member variables
private:
inline symmetry sy_cycl(const symmetry &c1, const symmetry &c2, const symmetry &c3) { return symmetry(symmetry::cyclic, c1, c2).add(c3); }
inline symmetry sy_cycl(const symmetry &c1, const symmetry &c2, const symmetry &c3, const symmetry &c4) { return symmetry(symmetry::cyclic, c1, c2).add(c3).add(c4); }
+// These return references to preallocated common symmetries (similar to
+// the numeric flyweights).
+const symmetry & not_symmetric();
+const symmetry & symmetric2();
+const symmetry & symmetric3();
+const symmetry & symmetric4();
+const symmetry & antisymmetric2();
+const symmetry & antisymmetric3();
+const symmetry & antisymmetric4();
+
/** Canonicalize the order of elements of an expression vector, according to
* the symmetry properties defined in a symmetry tree.
*
return symmetrize(e, v.begin(), v.end());
}
-// utility functions
-
-/** Specialization of is_exactly_a<symmetry>(obj) for symmetry objects. */
-template<> inline bool is_exactly_a<symmetry>(const basic & obj)
-{
- return obj.tinfo()==TINFO_symmetry;
-}
-
} // namespace GiNaC
#endif // ndef __GINAC_SYMMETRY_H__