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[ginac.git] / ginac / fail.h

diff --git a/ginac/fail.h b/ginac/fail.h
index c7a80a7e22cf54ac4aef3fdc31aca6cdf2d66811..82c183901ac353b01c63f1a35125902a35d4635c 100644 (file)
--- a/ginac/fail.h
+++ b/ginac/fail.h
@@ -1,10 +1,10 @@
 /** @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). */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  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
@@ -26,53 +26,27 @@
 
 #include "basic.h"
 
-#ifndef NO_NAMESPACE_GINAC
 namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
 
 class fail : public basic
 {
        GINAC_DECLARE_REGISTERED_CLASS(fail, basic)
-
-       // default constructor, destructor, copy constructor assignment operator and helpers
-public:
-       fail();
-       ~fail();
-       fail(const fail & other);
-       const fail & operator=(const fail & other);
-protected:
-       void copy(const fail & other);
-       void destroy(bool call_parent);
-
-       // other constructors
-       // none
-
-       // functions overriding virtual functions from bases classes
-public:
-       basic * duplicate() const;
-       void print(std::ostream & os, unsigned upper_precedence=0) const;
-       void printraw(std::ostream & os) const;
-protected:
-       int compare_same_type(const basic & other) const;
-       unsigned return_type(void) const { return return_types::noncommutative_composite; };
        
-       // new virtual functions which can be overridden by derived classes
-       // none
+       // functions overriding virtual functions from base classes
+protected:
+       unsigned return_type() const { return return_types::noncommutative_composite; };
 
        // non-virtual functions in this class
-       // none
-
-// member variables
-// none
+protected:
+       void do_print(const print_context & c, unsigned level) const;
 };
 
-// global constants
-
-extern const fail some_fail;
-extern const type_info & typeid_fail;
+/** 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;
+}
 
-#ifndef NO_NAMESPACE_GINAC
 } // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
 
 #endif // ndef __GINAC_FAIL_H__