re-enabled the assignment operator of class symbol

[ginac.git] / ginac / remember.h

diff --git a/ginac/remember.h b/ginac/remember.h
index f9f125406eb31c78a7ead9815b1b9174dd21436b..9a76a21bfe350e467473768ee7b1f5d0d5004ef8 100644 (file)
--- a/ginac/remember.h
+++ b/ginac/remember.h
@@ -4,7 +4,7 @@
  *  in GiNaC functions */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 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
@@ -24,6 +24,7 @@
 #ifndef __GINAC_REMEMBER_H__
 #define __GINAC_REMEMBER_H__
 
+#include <iosfwd>
 #include <vector>
 #include <list>