- New tinfo mechanism

[ginac.git] / ginac / symmetry.h

diff --git a/ginac/symmetry.h b/ginac/symmetry.h
index 0b805edc08c794a607b965e93e7bb95f3e55fab1..3720ee727012ba83a8b920fe76b09658316861d1 100644 (file)
--- a/ginac/symmetry.h
+++ b/ginac/symmetry.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symmetry definitions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2003 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
@@ -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__
@@ -61,10 +61,6 @@ public:
        /** Create node with two children. */
        symmetry(symmetry_type t, const symmetry &c1, const symmetry &c2);
 
-       // functions overriding virtual functions from base classes
-public:
-       void print(const print_context & c, unsigned level = 0) const;
-
        // non-virtual functions in this class
 public:
        /** Get symmetry type. */
@@ -85,6 +81,10 @@ public:
        /** Check whether this node actually represents any kind of symmetry. */
        bool has_symmetry() const {return type != none || !children.empty(); }
 
+protected:
+       void do_print(const print_context & c, unsigned level) const;
+       void do_print_tree(const print_tree & c, unsigned level) const;
+
        // member variables
 private:
        /** Type of symmetry described by this node. */
@@ -120,6 +120,16 @@ inline symmetry sy_cycl(const symmetry &c1, const symmetry &c2) { return symmetr
 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.
  *
@@ -158,14 +168,6 @@ 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__