121 lines
4.5 KiB
C++
121 lines
4.5 KiB
C++
// Exception Handling support header for -*- C++ -*-
|
|
|
|
// Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2002
|
|
// Free Software Foundation
|
|
//
|
|
// This file is part of GCC.
|
|
//
|
|
// GCC 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.
|
|
//
|
|
// GCC 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 GCC; 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
|
|
{
|
|
/**
|
|
* @brief Base class for all library exceptions.
|
|
*
|
|
* 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).
|
|
*/
|
|
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. It can also be called by the user. */
|
|
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
|
|
|
|
In 3.4 and later, this is on by default.
|
|
*/
|
|
void __verbose_terminate_handler ();
|
|
} // namespace __gnu_cxx
|
|
|
|
} // extern "C++"
|
|
|
|
#endif
|