/** @file fail.h
*
- * Interface to class signaling failure of operation. Considered obsolete all
- * this stuff ought to be replaced by exceptions. */
+ * Interface to class signaling failure of operation. Considered obsolete
+ * somewhat obsolete (most of this can be replaced by exceptions). */
-#ifndef _FAIL_H_
-#define _FAIL_H_
+/*
+ * GiNaC Copyright (C) 1999-2004 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 fail;
+#ifndef __GINAC_FAIL_H__
+#define __GINAC_FAIL_H__
#include "basic.h"
-#include "flags.h"
+
+namespace GiNaC {
class fail : public basic
{
-
-// member functions
-
- // default constructor, destructor, copy constructor assignment operator and helpers
-public:
- fail();
- ~fail();
- fail(fail const & other);
- fail const & operator=(fail const & other);
+ GINAC_DECLARE_REGISTERED_CLASS(fail, basic)
+
+ // functions overriding virtual functions from base classes
protected:
- void copy(fail const & other);
- void destroy(bool call_parent);
+ unsigned return_type() const { return return_types::noncommutative_composite; };
- // other constructors
- // none
-
- // functions overriding virtual functions from bases classes
-public:
- basic * duplicate() const;
- void printraw(ostream & os) const;
- void print(ostream & os, unsigned upper_precedence=0) const;
+ // non-virtual functions in this class
protected:
- int compare_same_type(basic const & other) const;
- unsigned return_type(void) const { return return_types::noncommutative_composite; };
-
- // new virtual functions which can be overridden by derived classes
- // none
-
- // non-virtual functions in this class
- // none
-
-// member variables
-// none
+ void do_print(const print_context & c, unsigned level) const;
};
-// global constants
-
-extern const fail some_fail;
-extern type_info const & typeid_fail;
-
-#endif // ndef _FAIL_H_
+/** Specialization of is_exactly_a<fail>(obj) for fail objects. */
+template<> inline bool is_exactly_a<fail>(const basic & obj)
+{
+ return obj.tinfo()==TINFO_fail;
+}
+} // namespace GiNaC
+#endif // ndef __GINAC_FAIL_H__