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|
// -*- 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 <cstdlib>
#include <type_traits>
#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
#include <vcruntime_exception.h>
#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
namespace std // purposefully not using versioning namespace
{
#if !defined(_LIBCPP_ABI_MICROSOFT) || defined(_LIBCPP_NO_VCRUNTIME)
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;
};
#endif // !_LIBCPP_ABI_MICROSOFT || _LIBCPP_NO_VCRUNTIME
#if _LIBCPP_STD_VER <= 14 \
|| defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS) \
|| defined(_LIBCPP_BUILDING_LIBRARY)
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();
#endif
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 _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS 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);
#ifndef _LIBCPP_ABI_MICROSOFT
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();
}
#else
((void)__e);
_VSTD::abort();
#endif
}
#else // _LIBCPP_ABI_MICROSOFT
class _LIBCPP_TYPE_VIS exception_ptr
{
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-private-field"
#endif
void* __ptr1_;
void* __ptr2_;
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
public:
exception_ptr() _NOEXCEPT;
exception_ptr(nullptr_t) _NOEXCEPT;
exception_ptr(const exception_ptr& __other) _NOEXCEPT;
exception_ptr& operator=(const exception_ptr& __other) _NOEXCEPT;
exception_ptr& operator=(nullptr_t) _NOEXCEPT;
~exception_ptr() _NOEXCEPT;
_LIBCPP_EXPLICIT operator bool() const _NOEXCEPT;
};
_LIBCPP_FUNC_VIS
bool operator==(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT;
inline _LIBCPP_INLINE_VISIBILITY
bool operator!=(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT
{return !(__x == __y);}
_LIBCPP_FUNC_VIS void swap(exception_ptr&, exception_ptr&) _NOEXCEPT;
_LIBCPP_FUNC_VIS exception_ptr __copy_exception_ptr(void *__except, const void* __ptr);
_LIBCPP_FUNC_VIS exception_ptr current_exception() _NOEXCEPT;
_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void rethrow_exception(exception_ptr p);
// This is a built-in template function which automagically extracts the required
// information.
template <class _E> void *__GetExceptionInfo(_E);
template<class _Ep>
exception_ptr
make_exception_ptr(_Ep __e) _NOEXCEPT
{
return __copy_exception_ptr(_VSTD::addressof(__e), __GetExceptionInfo(__e));
}
#endif // _LIBCPP_ABI_MICROSOFT
// 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) {}
};
#ifndef _LIBCPP_NO_EXCEPTIONS
template <class _Tp, class _Up, bool>
struct __throw_with_nested;
template <class _Tp, class _Up>
struct __throw_with_nested<_Tp, _Up, true> {
_LIBCPP_NORETURN static inline _LIBCPP_ALWAYS_INLINE void
#ifndef _LIBCPP_CXX03_LANG
__do_throw(_Tp&& __t)
#else
__do_throw (_Tp& __t)
#endif // _LIBCPP_CXX03_LANG
{
throw __nested<_Up>(_VSTD::forward<_Tp>(__t));
}
};
template <class _Tp, class _Up>
struct __throw_with_nested<_Tp, _Up, false> {
_LIBCPP_NORETURN static inline _LIBCPP_ALWAYS_INLINE void
#ifndef _LIBCPP_CXX03_LANG
__do_throw(_Tp&& __t)
#else
__do_throw (_Tp& __t)
#endif // _LIBCPP_CXX03_LANG
{
throw _VSTD::forward<_Tp>(__t);
}
};
#endif
template <class _Tp>
_LIBCPP_NORETURN
void
#ifndef _LIBCPP_CXX03_LANG
throw_with_nested(_Tp&& __t)
#else
throw_with_nested (_Tp& __t)
#endif // _LIBCPP_CXX03_LANG
{
#ifndef _LIBCPP_NO_EXCEPTIONS
typedef typename decay<_Tp>::type _Up;
static_assert( is_copy_constructible<_Up>::value, "type thrown must be CopyConstructible");
__throw_with_nested<_Tp, _Up,
is_class<_Up>::value &&
!is_base_of<nested_exception, _Up>::value &&
!__libcpp_is_final<_Up>::value>::
__do_throw(_VSTD::forward<_Tp>(__t));
#else
((void)__t);
// FIXME: Make this abort
#endif
}
template <class _From, class _To>
struct __can_dynamic_cast : public _LIBCPP_BOOL_CONSTANT(
is_polymorphic<_From>::value &&
(!is_base_of<_To, _From>::value ||
is_convertible<const _From*, const _To*>::value)) {};
template <class _Ep>
inline _LIBCPP_INLINE_VISIBILITY
void
rethrow_if_nested(const _Ep& __e,
typename enable_if< __can_dynamic_cast<_Ep, nested_exception>::value>::type* = 0)
{
const nested_exception* __nep = dynamic_cast<const nested_exception*>(_VSTD::addressof(__e));
if (__nep)
__nep->rethrow_nested();
}
template <class _Ep>
inline _LIBCPP_INLINE_VISIBILITY
void
rethrow_if_nested(const _Ep&,
typename enable_if<!__can_dynamic_cast<_Ep, nested_exception>::value>::type* = 0)
{
}
} // std
#endif // _LIBCPP_EXCEPTION
|
