*
* Interface to relations between expressions. */
-#ifndef _RELATIONAL_H_
-#define _RELATIONAL_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
+ */
-class relational;
+#ifndef __GINAC_RELATIONAL_H__
+#define __GINAC_RELATIONAL_H__
-#include "basic.h"
+#include <ginac/basic.h>
+#include <ginac/ex.h>
+
+#ifndef NO_GINAC_NAMESPACE
+namespace GiNaC {
+#endif // ndef NO_GINAC_NAMESPACE
/** This class holds a relation consisting of two expressions and a logical
* relation between them. */
extern const relational some_relational;
extern type_info const & typeid_relational;
-#define ex_to_relational(X) static_cast<relational const &>(*(X).bp)
-
-#endif // ndef _RELATIONAL_H_
+// utility functions
+inline const relational &ex_to_relational(const ex &e)
+{
+ return static_cast<const relational &>(*e.bp);
+}
+#ifndef NO_GINAC_NAMESPACE
+} // namespace GiNaC
+#endif // ndef NO_GINAC_NAMESPACE
+#endif // ndef __GINAC_RELATIONAL_H__