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[ginac.git] / ginac / symmetry.h

diff --git a/ginac/symmetry.h b/ginac/symmetry.h
index 69ca2bf4980d95ea95e88cfb8603afcfab1b3768..4f921fdf8f686955de22409500cce043f99a9094 100644 (file)
--- a/ginac/symmetry.h
+++ b/ginac/symmetry.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symmetry definitions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2009 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2019 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
@@ -61,6 +61,15 @@ public:
        /** 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. */
@@ -80,17 +89,13 @@ 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 anything non symmetric. */
+       bool has_nonsymmetric() const;
        /** Check whether this node involves a cyclic symmetry. */
        bool has_cyclic() 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);
 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:
@@ -165,7 +170,7 @@ inline ex antisymmetrize(const ex & e, const exvector & v)
        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);