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Code Editor : exception

// Exception Handling support header for -*- C++ -*-

// Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
// 2004, 2005, 2006, 2007, 2008, 2009
// 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 3, 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.
// 
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file exception
 *  This is a Standard C++ Library header.
 */

#ifndef __EXCEPTION__
#define __EXCEPTION__

#pragma GCC visibility push(default)

#include <bits/c++config.h>

extern "C++" {

namespace std 
{
  /**
   * @defgroup exceptions Exceptions
   * @ingroup diagnostics
   *
   * Classes and functions for reporting errors via exception classes.
   * @{
   */

/**
   *  @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();

// See comment in eh_exception.cc.
    virtual const char* what() const 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();

// @} group exceptions
} // namespace std

_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)

/** 
   *  @brief A replacement for the standard terminate_handler which
   *  prints more information about the terminating exception (if any)
   *  on stderr.  
   *
   *  @ingroup exceptions
   *
   *  Call
   *   @code
   *     std::set_terminate(__gnu_cxx::__verbose_terminate_handler)
   *   @endcode
   *  to use.  For more info, see
   *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html
   *
   *  In 3.4 and later, this is on by default.
   */
  void __verbose_terminate_handler();

_GLIBCXX_END_NAMESPACE
  
} // extern "C++"

#pragma GCC visibility pop

#if (defined(__GXX_EXPERIMENTAL_CXX0X__) \
     && defined(_GLIBCXX_ATOMIC_BUILTINS_4))
#include <exception_ptr.h>
#endif

#endif

${this.title}

Code Editor : exception