1    	// Exception Handling support header for -*- C++ -*-
2    	
3    	// Copyright (C) 1995-2017 Free Software Foundation, Inc.
4    	//
5    	// This file is part of GCC.
6    	//
7    	// GCC is free software; you can redistribute it and/or modify
8    	// it under the terms of the GNU General Public License as published by
9    	// the Free Software Foundation; either version 3, or (at your option)
10   	// any later version.
11   	//
12   	// GCC is distributed in the hope that it will be useful,
13   	// but WITHOUT ANY WARRANTY; without even the implied warranty of
14   	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   	// GNU General Public License for more details.
16   	//
17   	// Under Section 7 of GPL version 3, you are granted additional
18   	// permissions described in the GCC Runtime Library Exception, version
19   	// 3.1, as published by the Free Software Foundation.
20   	
21   	// You should have received a copy of the GNU General Public License and
22   	// a copy of the GCC Runtime Library Exception along with this program;
23   	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24   	// <http://www.gnu.org/licenses/>.
25   	
26   	/** @file exception
27   	 *  This is a Standard C++ Library header.
28   	 */
29   	
30   	#ifndef __EXCEPTION__
31   	#define __EXCEPTION__
32   	
33   	#pragma GCC system_header
34   	
35   	#pragma GCC visibility push(default)
36   	
37   	#include <bits/c++config.h>
38   	#include <bits/exception.h>
39   	
40   	extern "C++" {
41   	
42   	namespace std
43   	{
44   	  /** If an %exception is thrown which is not listed in a function's
45   	   *  %exception specification, one of these may be thrown.  */
46   	  class bad_exception : public exception
47   	  {
48   	  public:
49   	    bad_exception() _GLIBCXX_USE_NOEXCEPT { }
50   	
51   	    // This declaration is not useless:
52   	    // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
53   	    virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
54   	
55   	    // See comment in eh_exception.cc.
56   	    virtual const char*
57   	    what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
58   	  };
59   	
60   	  /// If you write a replacement %terminate handler, it must be of this type.
61   	  typedef void (*terminate_handler) ();
62   	
63   	  /// If you write a replacement %unexpected handler, it must be of this type.
64   	  typedef void (*unexpected_handler) ();
65   	
66   	  /// Takes a new handler function as an argument, returns the old function.
67   	  terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT;
68   	
69   	#if __cplusplus >= 201103L
70   	  /// Return the current terminate handler.
71   	  terminate_handler get_terminate() noexcept;
72   	#endif
73   	
74   	  /** The runtime will call this function if %exception handling must be
75   	   *  abandoned for any reason.  It can also be called by the user.  */
76   	  void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__));
77   	
78   	  /// Takes a new handler function as an argument, returns the old function.
79   	  unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT;
80   	
81   	#if __cplusplus >= 201103L
82   	  /// Return the current unexpected handler.
83   	  unexpected_handler get_unexpected() noexcept;
84   	#endif
85   	
86   	  /** The runtime will call this function if an %exception is thrown which
87   	   *  violates the function's %exception specification.  */
88   	  void unexpected() __attribute__ ((__noreturn__));
89   	
90   	  /** [18.6.4]/1:  'Returns true after completing evaluation of a
91   	   *  throw-expression until either completing initialization of the
92   	   *  exception-declaration in the matching handler or entering @c unexpected()
93   	   *  due to the throw; or after entering @c terminate() for any reason
94   	   *  other than an explicit call to @c terminate().  [Note: This includes
95   	   *  stack unwinding [15.2].  end note]'
96   	   *
97   	   *  2: 'When @c uncaught_exception() is true, throwing an
98   	   *  %exception can result in a call of @c terminate()
99   	   *  (15.5.1).'
100  	   */
101  	  bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
102  	
103  	#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++98
104  	#define __cpp_lib_uncaught_exceptions 201411
105  	  /// The number of uncaught exceptions.
106  	  int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
107  	#endif
108  	
109  	  // @} group exceptions
110  	} // namespace std
111  	
112  	namespace __gnu_cxx
113  	{
114  	_GLIBCXX_BEGIN_NAMESPACE_VERSION
115  	
116  	  /**
117  	   *  @brief A replacement for the standard terminate_handler which
118  	   *  prints more information about the terminating exception (if any)
119  	   *  on stderr.
120  	   *
121  	   *  @ingroup exceptions
122  	   *
123  	   *  Call
124  	   *   @code
125  	   *     std::set_terminate(__gnu_cxx::__verbose_terminate_handler)
126  	   *   @endcode
127  	   *  to use.  For more info, see
128  	   *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html
129  	   *
130  	   *  In 3.4 and later, this is on by default.
131  	   */
132  	  void __verbose_terminate_handler();
133  	
134  	_GLIBCXX_END_NAMESPACE_VERSION
135  	} // namespace
136  	
137  	} // extern "C++"
138  	
139  	#pragma GCC visibility pop
140  	
141  	#if (__cplusplus >= 201103L)
142  	#include <bits/exception_ptr.h>
143  	#include <bits/nested_exception.h>
144  	#endif
145  	
146  	#endif
147