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[ginac.git] / ginac / clifford.h

diff --git a/ginac/clifford.h b/ginac/clifford.h
index 0193fdaf59a0958c7e6612845d8e6cba8bb567de..c076d6156803efc7943a5c248c60472f4a1b6a62 100644 (file)
--- a/ginac/clifford.h
+++ b/ginac/clifford.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's clifford algebra (Dirac gamma) objects. */
 
 /*
- *  GiNaC Copyright (C) 1999-2015 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
@@ -77,6 +77,7 @@ public:
 protected:
        void do_print_dflt(const print_dflt & c, unsigned level) const;
        void do_print_latex(const print_latex & c, unsigned level) const;
+       void do_print_tree(const print_tree & c, unsigned level) const;
 
        // member variables
 protected:
@@ -281,12 +282,16 @@ ex canonicalize_clifford(const ex & e);
  *  clifford units. */
 ex clifford_prime(const ex & e);
 
+/** An auxillary function performing clifford_star() and clifford_bar().*/
+ex clifford_star_bar(const ex & e, bool do_bar, unsigned options);
+
 /** Main anti-automorphism of the Clifford algebra: makes reversion
  *  and changes signs of all clifford units. */
-inline ex clifford_bar(const ex & e) { return clifford_prime(e.conjugate()); }
+inline ex clifford_bar(const ex & e) { return clifford_star_bar(e, true, 0); }
 
-/** Reversion of the Clifford algebra, coincides with the conjugate(). */
-inline ex clifford_star(const ex & e) { return e.conjugate(); }
+/** Reversion of the Clifford algebra, reverse the order of all clifford units
+ *  in ncmul. */
+inline ex clifford_star(const ex & e) { return clifford_star_bar(e, false, 0); }
 
 /** Replaces dirac_ONE's (with a representation_label no less than rl) in e with 1.
  *  For the default value rl = 0 remove all of them. Aborts if e contains any