- put everything in "GiNaC" namespace

[ginac.git] / ginac / symbol.h

diff --git a/ginac/symbol.h b/ginac/symbol.h
index a10998ecc4520e0479c2cc0ed018d9247a1d4480..9905f3c861efe501dd2a365ed795f98bbf36427a 100644 (file)
--- a/ginac/symbol.h
+++ b/ginac/symbol.h
@@ -2,15 +2,32 @@
  *
  *  Interface to GiNaC's symbolic objects. */
 
-#ifndef _SYMBOL_H_
-#define _SYMBOL_H_
+/*
+ *  GiNaC Copyright (C) 1999 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
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  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
+ */
 
-#include <string>
+#ifndef __GINAC_SYMBOL_H__
+#define __GINAC_SYMBOL_H__
 
-class symbol;
+#include <string>
+#include <ginac/basic.h>
+#include <ginac/ex.h>
 
-#include "basic.h"
-#include "ex.h"
+namespace GiNaC {
 
 /** Basic CAS symbol.  It has a name because it must know how to output itself.
  *  It may be assigned an expression, but this feature is only intended for
@@ -94,9 +111,11 @@ private:
 extern const symbol some_symbol;
 extern type_info const & typeid_symbol;
 
-// macros
-
-#define ex_to_symbol(X) static_cast<symbol const &>(*(X).bp)
+// utility functions
+inline const symbol &ex_to_symbol(const ex &e)
+{
+       return static_cast<const symbol &>(*e.bp);
+}
 
 // wrapper functions around member functions
 inline void unassign(symbol & symarg)
@@ -108,4 +127,6 @@ inline int degree(symbol const & a, symbol const & s)
 inline int ldegree(symbol const & a, symbol const & s)
 { return a.ldegree(s); }
 
-#endif // ndef _SYMBOL_H_
+} // namespace GiNaC
+
+#endif // ndef __GINAC_SYMBOL_H__