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- // Exception Handling support header for -*- C++ -*-
-
- // Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2002
- // Free Software Foundation
- //
- // This file is part of GNU CC.
- //
- // GNU CC 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, or (at your option)
- // any later version.
- //
- // GNU CC 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 GNU CC; see the file COPYING. If not, write to
- // the Free Software Foundation, 59 Temple Place - Suite 330,
- // Boston, MA 02111-1307, USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- /** @file exception
- * This header defines several types and functions relating to the
- * handling of exceptions in a C++ program.
- */
-
- #ifndef __EXCEPTION__
- #define __EXCEPTION__
-
- extern "C++" {
-
- namespace std
- {
- /** This is the base class for all exceptions thrown by the standard
- * library, and by certain language expressions. You are free to derive
- * your own %exception classes, or use a different hierarchy, or to
- * throw non-class data (e.g., fundamental types).
- * @brief Base class for all library exceptions.
- */
- class exception
- {
- public:
- exception() throw() { }
- virtual ~exception() throw();
- /** Returns a C-style character string describing the general cause
- * of the current error. */
- virtual const char* what() const throw();
- };
-
- /** If an %exception is thrown which is not listed in a function's
- * %exception specification, one of these may be thrown. */
- class bad_exception : public exception
- {
- public:
- bad_exception() throw() { }
- // This declaration is not useless:
- // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
- virtual ~bad_exception() throw();
- };
-
- /// If you write a replacement %terminate handler, it must be of this type.
- typedef void (*terminate_handler) ();
- /// If you write a replacement %unexpected handler, it must be of this type.
- typedef void (*unexpected_handler) ();
-
- /// Takes a new handler function as an argument, returns the old function.
- terminate_handler set_terminate(terminate_handler) throw();
- /** The runtime will call this function if %exception handling must be
- * abandoned for any reason. */
- void terminate() __attribute__ ((__noreturn__));
-
- /// Takes a new handler function as an argument, returns the old function.
- unexpected_handler set_unexpected(unexpected_handler) throw();
- /** The runtime will call this function if an %exception is thrown which
- * violates the function's %exception specification. */
- void unexpected() __attribute__ ((__noreturn__));
-
- /** [18.6.4]/1: "Returns true after completing evaluation of a
- * throw-expression until either completing initialization of the
- * exception-declaration in the matching handler or entering @c unexpected()
- * due to the throw; or after entering @c terminate() for any reason
- * other than an explicit call to @c terminate(). [Note: This includes
- * stack unwinding [15.2]. end note]"
- *
- * 2: "When @c uncaught_exception() is true, throwing an %exception can
- * result in a call of @c terminate() (15.5.1)."
- */
- bool uncaught_exception() throw();
- } // namespace std
-
- namespace __gnu_cxx
- {
- /** A replacement for the standard terminate_handler which prints more
- information about the terminating exception (if any) on stderr. Call
- @code
- std::set_terminate (__gnu_cxx::__verbose_terminate_handler)
- @endcode
- to use. For more info, see
- http://gcc.gnu.org/onlinedocs/libstdc++/19_diagnostics/howto.html#4
- */
- void __verbose_terminate_handler ();
- } // namespace __gnu_cxx
-
- } // extern "C++"
-
- #endif
-