/** @file fail.h
*
* Interface to class signaling failure of operation. Considered obsolete
- * (all of this is replaced by exceptions). */
+ * somewhat obsolete (most of this can be replaced by exceptions). */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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
{
GINAC_DECLARE_REGISTERED_CLASS(fail, basic)
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
void print(const print_context & c, unsigned level = 0) const;
protected:
unsigned return_type(void) const { return return_types::noncommutative_composite; };
};
+/** 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__