LCOM1920-T02G10

// -*- C++ -*-

//===-------------------------- exception ---------------------------------===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is dual licensed under the MIT and the University of Illinois Open

// Source Licenses. See LICENSE.TXT for details.

//

//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_EXCEPTION

#define _LIBCPP_EXCEPTION

/*

    exception synopsis

namespace std

{

class exception

{

public:

    exception() noexcept;

    exception(const exception&) noexcept;

    exception& operator=(const exception&) noexcept;

    virtual ~exception() noexcept;

    virtual const char* what() const noexcept;

};

class bad_exception

    : public exception

{

public:

    bad_exception() noexcept;

    bad_exception(const bad_exception&) noexcept;

    bad_exception& operator=(const bad_exception&) noexcept;

    virtual ~bad_exception() noexcept;

    virtual const char* what() const noexcept;

};

typedef void (*unexpected_handler)();

unexpected_handler set_unexpected(unexpected_handler  f ) noexcept;

unexpected_handler get_unexpected() noexcept;

[[noreturn]] void unexpected();

typedef void (*terminate_handler)();

terminate_handler set_terminate(terminate_handler  f ) noexcept;

terminate_handler get_terminate() noexcept;

[[noreturn]] void terminate() noexcept;

bool uncaught_exception()  noexcept;

int  uncaught_exceptions() noexcept;  // C++17

typedef unspecified exception_ptr;

exception_ptr current_exception() noexcept;

void rethrow_exception [[noreturn]] (exception_ptr p);

template<class E> exception_ptr make_exception_ptr(E e) noexcept;

class nested_exception

{

public:

    nested_exception() noexcept;

    nested_exception(const nested_exception&) noexcept = default;

    nested_exception& operator=(const nested_exception&) noexcept = default;

    virtual ~nested_exception() = default;

    // access functions

    [[noreturn]] void rethrow_nested() const;

    exception_ptr nested_ptr() const noexcept;

};

template <class T> [[noreturn]] void throw_with_nested(T&& t);

template <class E> void rethrow_if_nested(const E& e);

}  // std

*/

#include <__config>

#include <cstddef>

#include <type_traits>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)

#pragma GCC system_header

#endif

namespace std  // purposefully not using versioning namespace

{

class _LIBCPP_EXCEPTION_ABI exception

{

public:

    _LIBCPP_INLINE_VISIBILITY exception() _NOEXCEPT {}

    virtual ~exception() _NOEXCEPT;

    virtual const char* what() const _NOEXCEPT;

};

class _LIBCPP_EXCEPTION_ABI bad_exception

    : public exception

{

public:

    _LIBCPP_INLINE_VISIBILITY bad_exception() _NOEXCEPT {}

    virtual ~bad_exception() _NOEXCEPT;

    virtual const char* what() const _NOEXCEPT;

};

typedef void (*unexpected_handler)();

_LIBCPP_FUNC_VIS unexpected_handler set_unexpected(unexpected_handler) _NOEXCEPT;

_LIBCPP_FUNC_VIS unexpected_handler get_unexpected() _NOEXCEPT;

_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void unexpected();

typedef void (*terminate_handler)();

_LIBCPP_FUNC_VIS terminate_handler set_terminate(terminate_handler) _NOEXCEPT;

_LIBCPP_FUNC_VIS terminate_handler get_terminate() _NOEXCEPT;

_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void terminate() _NOEXCEPT;

_LIBCPP_FUNC_VIS bool uncaught_exception() _NOEXCEPT;

_LIBCPP_FUNC_VIS int uncaught_exceptions() _NOEXCEPT;

class _LIBCPP_TYPE_VIS exception_ptr;

_LIBCPP_FUNC_VIS exception_ptr current_exception() _NOEXCEPT;

_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void rethrow_exception(exception_ptr);

class _LIBCPP_TYPE_VIS exception_ptr

{

    void* __ptr_;

public:

    _LIBCPP_INLINE_VISIBILITY exception_ptr() _NOEXCEPT : __ptr_() {}

    _LIBCPP_INLINE_VISIBILITY exception_ptr(nullptr_t) _NOEXCEPT : __ptr_() {}

    exception_ptr(const exception_ptr&) _NOEXCEPT;

    exception_ptr& operator=(const exception_ptr&) _NOEXCEPT;

    ~exception_ptr() _NOEXCEPT;

    _LIBCPP_INLINE_VISIBILITY

    _LIBCPP_EXPLICIT

        operator bool() const _NOEXCEPT {return __ptr_ != nullptr;}

    friend _LIBCPP_INLINE_VISIBILITY

    bool operator==(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT

        {return __x.__ptr_ == __y.__ptr_;}

    friend _LIBCPP_INLINE_VISIBILITY

    bool operator!=(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT

        {return !(__x == __y);}

    friend _LIBCPP_FUNC_VIS exception_ptr current_exception() _NOEXCEPT;

    friend _LIBCPP_FUNC_VIS void rethrow_exception(exception_ptr);

};

template<class _Ep>

exception_ptr

make_exception_ptr(_Ep __e) _NOEXCEPT

{

#ifndef _LIBCPP_NO_EXCEPTIONS

    try

    {

        throw __e;

    }

    catch (...)

    {

        return current_exception();

    }

#endif  // _LIBCPP_NO_EXCEPTIONS

}

// nested_exception

class _LIBCPP_EXCEPTION_ABI nested_exception

{

    exception_ptr __ptr_;

public:

    nested_exception() _NOEXCEPT;

//     nested_exception(const nested_exception&) noexcept = default;

//     nested_exception& operator=(const nested_exception&) noexcept = default;

    virtual ~nested_exception() _NOEXCEPT;

    // access functions

    _LIBCPP_NORETURN void rethrow_nested() const;

    _LIBCPP_INLINE_VISIBILITY exception_ptr nested_ptr() const _NOEXCEPT {return __ptr_;}

};

template <class _Tp>

struct __nested

    : public _Tp,

      public nested_exception

{

    _LIBCPP_INLINE_VISIBILITY explicit __nested(const _Tp& __t) : _Tp(__t) {}

};

template <class _Tp>

_LIBCPP_NORETURN

void

#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES

throw_with_nested(_Tp&& __t, typename enable_if<

                  is_class<typename remove_reference<_Tp>::type>::value &&

                  !is_base_of<nested_exception, typename remove_reference<_Tp>::type>::value

                  && !__libcpp_is_final<typename remove_reference<_Tp>::type>::value

                                    >::type* = 0)

#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

throw_with_nested (_Tp& __t, typename enable_if<

                  is_class<_Tp>::value && !is_base_of<nested_exception, _Tp>::value

                                    >::type* = 0)

#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

{

#ifndef _LIBCPP_NO_EXCEPTIONS

    throw __nested<typename remove_reference<_Tp>::type>(_VSTD::forward<_Tp>(__t));

#endif

}

template <class _Tp>

_LIBCPP_NORETURN

void

#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES

throw_with_nested(_Tp&& __t, typename enable_if<

                  !is_class<typename remove_reference<_Tp>::type>::value ||

                  is_base_of<nested_exception, typename remove_reference<_Tp>::type>::value

                  || __libcpp_is_final<typename remove_reference<_Tp>::type>::value

                                    >::type* = 0)

#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

throw_with_nested (_Tp& __t, typename enable_if<

                  !is_class<_Tp>::value || is_base_of<nested_exception, _Tp>::value

                                    >::type* = 0)

#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

{

#ifndef _LIBCPP_NO_EXCEPTIONS

    throw _VSTD::forward<_Tp>(__t);

#endif

}

template <class _Ep>

inline _LIBCPP_INLINE_VISIBILITY

void

rethrow_if_nested(const _Ep& __e, typename enable_if<

                                   is_polymorphic<_Ep>::value

                                                   >::type* = 0)

{

    const nested_exception* __nep = dynamic_cast<const nested_exception*>(&__e);

    if (__nep)

        __nep->rethrow_nested();

}

template <class _Ep>

inline _LIBCPP_INLINE_VISIBILITY

void

rethrow_if_nested(const _Ep&, typename enable_if<

                                   !is_polymorphic<_Ep>::value

                                                   >::type* = 0)

{

}

}  // std

#endif  // _LIBCPP_EXCEPTION