* Avoid getrusage(2) on systems that don't have it (by ASheplyakov Alexei

[ginac.git] / ginac / expair.cpp

diff --git a/ginac/expair.cpp b/ginac/expair.cpp
index 9fe283b61ebeaa24969b223fa925d99b5d0d70d0..6fa2b6219b047dd9c7ab2af83cca4c404b9b9fc5 100644 (file)
--- a/ginac/expair.cpp
+++ b/ginac/expair.cpp
@@ -3,7 +3,7 @@
  *  Implementation of expression pairs (building blocks of expairseq). */
 
 /*
- *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2005 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
@@ -17,12 +17,13 @@
  *
  *  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
  */
 
 #include <iostream>
 
 #include "expair.h"
+#include "operators.h"
 
 namespace GiNaC {
 
@@ -34,4 +35,14 @@ void expair::print(std::ostream & os) const
        coeff.print(c, c.delta_indent);
 }
 
+const expair expair::conjugate() const
+{
+       ex newrest = rest.conjugate();
+       ex newcoeff = coeff.conjugate();
+       if (are_ex_trivially_equal(newrest,rest) && are_ex_trivially_equal(newcoeff,coeff)) {
+               return *this;
+       }
+       return expair(newrest, newcoeff);
+}
+
 } // namespace GiNaC