mod_gcd: naive hack to chose a 'good' prime (to speed up gcd computation).

[ginac.git] / ginac / symmetry.h

diff --git a/ginac/symmetry.h b/ginac/symmetry.h
index 4ec444f8bd393b61088e981ad0bfafd35bc72ef4..5cd62c713ae295671dd158b115f77ecc7bc9daa7 100644 (file)
--- a/ginac/symmetry.h
+++ b/ginac/symmetry.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symmetry definitions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2008 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
@@ -17,7 +17,7 @@
  *
  *  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__
@@ -80,10 +80,13 @@ public:
 
        /** Check whether this node actually represents any kind of symmetry. */
        bool has_symmetry() const {return type != none || !children.empty(); }
+       /** 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;
+       unsigned calchash() const;
 
        // member variables
 private:
@@ -136,7 +139,7 @@ const symmetry & antisymmetric4();
  *  @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). */
@@ -168,14 +171,6 @@ inline ex symmetrize_cyclic(const ex & e, const exvector & v)
        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__