merging 1.2 branch into main trunk

[ginac.git] / ginac / symmetry.h

diff --git a/ginac/symmetry.h b/ginac/symmetry.h
index 440ece1883fae1b674a34bc0ac41bbcd214fdf11..0b805edc08c794a607b965e93e7bb95f3e55fab1 100644 (file)
--- a/ginac/symmetry.h
+++ b/ginac/symmetry.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symmetry definitions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2003 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
@@ -83,7 +83,7 @@ public:
        void validate(unsigned n);
 
        /** Check whether this node actually represents any kind of symmetry. */
-       bool has_symmetry(void) const {return type != none || !children.empty(); }
+       bool has_symmetry() const {return type != none || !children.empty(); }
 
        // member variables
 private:
@@ -99,32 +99,23 @@ private:
 
 
 // global functions
-inline const symmetry &ex_to_symmetry(const ex &e)
-{
-       return static_cast<const symmetry &>(*e.bp);
-}
-
-inline symmetry &ex_to_nonconst_symmetry(const ex &e)
-{
-       return static_cast<symmetry &>(*e.bp);
-}
 
-inline symmetry sy_none(void) { return symmetry(); }
+inline symmetry sy_none() { return symmetry(); }
 inline symmetry sy_none(const symmetry &c1, const symmetry &c2) { return symmetry(symmetry::none, c1, c2); }
 inline symmetry sy_none(const symmetry &c1, const symmetry &c2, const symmetry &c3) { return symmetry(symmetry::none, c1, c2).add(c3); }
 inline symmetry sy_none(const symmetry &c1, const symmetry &c2, const symmetry &c3, const symmetry &c4) { return symmetry(symmetry::none, c1, c2).add(c3).add(c4); }
 
-inline symmetry sy_symm(void) { symmetry s; s.set_type(symmetry::symmetric); return s; }
+inline symmetry sy_symm() { symmetry s; s.set_type(symmetry::symmetric); return s; }
 inline symmetry sy_symm(const symmetry &c1, const symmetry &c2) { return symmetry(symmetry::symmetric, c1, c2); }
 inline symmetry sy_symm(const symmetry &c1, const symmetry &c2, const symmetry &c3) { return symmetry(symmetry::symmetric, c1, c2).add(c3); }
 inline symmetry sy_symm(const symmetry &c1, const symmetry &c2, const symmetry &c3, const symmetry &c4) { return symmetry(symmetry::symmetric, c1, c2).add(c3).add(c4); }
 
-inline symmetry sy_anti(void) { symmetry s; s.set_type(symmetry::antisymmetric); return s; }
+inline symmetry sy_anti() { symmetry s; s.set_type(symmetry::antisymmetric); return s; }
 inline symmetry sy_anti(const symmetry &c1, const symmetry &c2) { return symmetry(symmetry::antisymmetric, c1, c2); }
 inline symmetry sy_anti(const symmetry &c1, const symmetry &c2, const symmetry &c3) { return symmetry(symmetry::antisymmetric, c1, c2).add(c3); }
 inline symmetry sy_anti(const symmetry &c1, const symmetry &c2, const symmetry &c3, const symmetry &c4) { return symmetry(symmetry::antisymmetric, c1, c2).add(c3).add(c4); }
 
-inline symmetry sy_cycl(void) { symmetry s; s.set_type(symmetry::cyclic); return s; }
+inline symmetry sy_cycl() { symmetry s; s.set_type(symmetry::cyclic); return s; }
 inline symmetry sy_cycl(const symmetry &c1, const symmetry &c2) { return symmetry(symmetry::cyclic, c1, c2); }
 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); }
@@ -167,6 +158,14 @@ 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__