You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
672 lines
19 KiB
C++
672 lines
19 KiB
C++
// -*- C++ -*-
|
|
//===------------------------------ any -----------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP_ANY
|
|
#define _LIBCPP_ANY
|
|
|
|
/*
|
|
any synopsis
|
|
|
|
namespace std {
|
|
|
|
class bad_any_cast : public bad_cast
|
|
{
|
|
public:
|
|
virtual const char* what() const noexcept;
|
|
};
|
|
|
|
class any
|
|
{
|
|
public:
|
|
|
|
// 6.3.1 any construct/destruct
|
|
any() noexcept;
|
|
|
|
any(const any& other);
|
|
any(any&& other) noexcept;
|
|
|
|
template <class ValueType>
|
|
any(ValueType&& value);
|
|
|
|
~any();
|
|
|
|
// 6.3.2 any assignments
|
|
any& operator=(const any& rhs);
|
|
any& operator=(any&& rhs) noexcept;
|
|
|
|
template <class ValueType>
|
|
any& operator=(ValueType&& rhs);
|
|
|
|
// 6.3.3 any modifiers
|
|
template <class ValueType, class... Args>
|
|
decay_t<ValueType>& emplace(Args&&... args);
|
|
template <class ValueType, class U, class... Args>
|
|
decay_t<ValueType>& emplace(initializer_list<U>, Args&&...);
|
|
void reset() noexcept;
|
|
void swap(any& rhs) noexcept;
|
|
|
|
// 6.3.4 any observers
|
|
bool has_value() const noexcept;
|
|
const type_info& type() const noexcept;
|
|
};
|
|
|
|
// 6.4 Non-member functions
|
|
void swap(any& x, any& y) noexcept;
|
|
|
|
template <class T, class ...Args>
|
|
any make_any(Args&& ...args);
|
|
template <class T, class U, class ...Args>
|
|
any make_any(initializer_list<U>, Args&& ...args);
|
|
|
|
template<class ValueType>
|
|
ValueType any_cast(const any& operand);
|
|
template<class ValueType>
|
|
ValueType any_cast(any& operand);
|
|
template<class ValueType>
|
|
ValueType any_cast(any&& operand);
|
|
|
|
template<class ValueType>
|
|
const ValueType* any_cast(const any* operand) noexcept;
|
|
template<class ValueType>
|
|
ValueType* any_cast(any* operand) noexcept;
|
|
|
|
} // namespace std
|
|
|
|
*/
|
|
|
|
#include <experimental/__config>
|
|
#include <memory>
|
|
#include <new>
|
|
#include <typeinfo>
|
|
#include <type_traits>
|
|
#include <cstdlib>
|
|
#include <version>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
namespace std {
|
|
class _LIBCPP_EXCEPTION_ABI _LIBCPP_AVAILABILITY_BAD_ANY_CAST bad_any_cast : public bad_cast
|
|
{
|
|
public:
|
|
virtual const char* what() const _NOEXCEPT;
|
|
};
|
|
} // namespace std
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
|
|
void __throw_bad_any_cast()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
throw bad_any_cast();
|
|
#else
|
|
_VSTD::abort();
|
|
#endif
|
|
}
|
|
|
|
// Forward declarations
|
|
class _LIBCPP_TEMPLATE_VIS any;
|
|
|
|
template <class _ValueType>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
add_pointer_t<add_const_t<_ValueType>>
|
|
any_cast(any const *) _NOEXCEPT;
|
|
|
|
template <class _ValueType>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
add_pointer_t<_ValueType> any_cast(any *) _NOEXCEPT;
|
|
|
|
namespace __any_imp
|
|
{
|
|
using _Buffer = aligned_storage_t<3*sizeof(void*), alignment_of<void*>::value>;
|
|
|
|
template <class _Tp>
|
|
using _IsSmallObject = integral_constant<bool
|
|
, sizeof(_Tp) <= sizeof(_Buffer)
|
|
&& alignment_of<_Buffer>::value
|
|
% alignment_of<_Tp>::value == 0
|
|
&& is_nothrow_move_constructible<_Tp>::value
|
|
>;
|
|
|
|
enum class _Action {
|
|
_Destroy,
|
|
_Copy,
|
|
_Move,
|
|
_Get,
|
|
_TypeInfo
|
|
};
|
|
|
|
template <class _Tp> struct _SmallHandler;
|
|
template <class _Tp> struct _LargeHandler;
|
|
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS __unique_typeinfo { static constexpr int __id = 0; };
|
|
template <class _Tp> constexpr int __unique_typeinfo<_Tp>::__id;
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
constexpr const void* __get_fallback_typeid() {
|
|
return &__unique_typeinfo<decay_t<_Tp>>::__id;
|
|
}
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool __compare_typeid(type_info const* __id, const void* __fallback_id)
|
|
{
|
|
#if !defined(_LIBCPP_NO_RTTI)
|
|
if (__id && *__id == typeid(_Tp))
|
|
return true;
|
|
#endif
|
|
if (!__id && __fallback_id == __any_imp::__get_fallback_typeid<_Tp>())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
template <class _Tp>
|
|
using _Handler = conditional_t<
|
|
_IsSmallObject<_Tp>::value, _SmallHandler<_Tp>, _LargeHandler<_Tp>>;
|
|
|
|
} // namespace __any_imp
|
|
|
|
class _LIBCPP_TEMPLATE_VIS any
|
|
{
|
|
public:
|
|
// construct/destruct
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
constexpr any() _NOEXCEPT : __h(nullptr) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any(any const & __other) : __h(nullptr)
|
|
{
|
|
if (__other.__h) __other.__call(_Action::_Copy, this);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any(any && __other) _NOEXCEPT : __h(nullptr)
|
|
{
|
|
if (__other.__h) __other.__call(_Action::_Move, this);
|
|
}
|
|
|
|
template <
|
|
class _ValueType
|
|
, class _Tp = decay_t<_ValueType>
|
|
, class = enable_if_t<
|
|
!is_same<_Tp, any>::value &&
|
|
!__is_inplace_type<_ValueType>::value &&
|
|
is_copy_constructible<_Tp>::value>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any(_ValueType && __value);
|
|
|
|
template <class _ValueType, class ..._Args,
|
|
class _Tp = decay_t<_ValueType>,
|
|
class = enable_if_t<
|
|
is_constructible<_Tp, _Args...>::value &&
|
|
is_copy_constructible<_Tp>::value
|
|
>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit any(in_place_type_t<_ValueType>, _Args&&... __args);
|
|
|
|
template <class _ValueType, class _Up, class ..._Args,
|
|
class _Tp = decay_t<_ValueType>,
|
|
class = enable_if_t<
|
|
is_constructible<_Tp, initializer_list<_Up>&, _Args...>::value &&
|
|
is_copy_constructible<_Tp>::value>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit any(in_place_type_t<_ValueType>, initializer_list<_Up>, _Args&&... __args);
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
~any() { this->reset(); }
|
|
|
|
// assignments
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any & operator=(any const & __rhs) {
|
|
any(__rhs).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any & operator=(any && __rhs) _NOEXCEPT {
|
|
any(_VSTD::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
template <
|
|
class _ValueType
|
|
, class _Tp = decay_t<_ValueType>
|
|
, class = enable_if_t<
|
|
!is_same<_Tp, any>::value
|
|
&& is_copy_constructible<_Tp>::value>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
any & operator=(_ValueType && __rhs);
|
|
|
|
template <class _ValueType, class ..._Args,
|
|
class _Tp = decay_t<_ValueType>,
|
|
class = enable_if_t<
|
|
is_constructible<_Tp, _Args...>::value &&
|
|
is_copy_constructible<_Tp>::value>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp& emplace(_Args&&... args);
|
|
|
|
template <class _ValueType, class _Up, class ..._Args,
|
|
class _Tp = decay_t<_ValueType>,
|
|
class = enable_if_t<
|
|
is_constructible<_Tp, initializer_list<_Up>&, _Args...>::value &&
|
|
is_copy_constructible<_Tp>::value>
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Tp& emplace(initializer_list<_Up>, _Args&&...);
|
|
|
|
// 6.3.3 any modifiers
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void reset() _NOEXCEPT { if (__h) this->__call(_Action::_Destroy); }
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(any & __rhs) _NOEXCEPT;
|
|
|
|
// 6.3.4 any observers
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool has_value() const _NOEXCEPT { return __h != nullptr; }
|
|
|
|
#if !defined(_LIBCPP_NO_RTTI)
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const type_info & type() const _NOEXCEPT {
|
|
if (__h) {
|
|
return *static_cast<type_info const *>(this->__call(_Action::_TypeInfo));
|
|
} else {
|
|
return typeid(void);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
private:
|
|
typedef __any_imp::_Action _Action;
|
|
using _HandleFuncPtr = void* (*)(_Action, any const *, any *, const type_info *,
|
|
const void* __fallback_info);
|
|
|
|
union _Storage {
|
|
constexpr _Storage() : __ptr(nullptr) {}
|
|
void * __ptr;
|
|
__any_imp::_Buffer __buf;
|
|
};
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void * __call(_Action __a, any * __other = nullptr,
|
|
type_info const * __info = nullptr,
|
|
const void* __fallback_info = nullptr) const
|
|
{
|
|
return __h(__a, this, __other, __info, __fallback_info);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void * __call(_Action __a, any * __other = nullptr,
|
|
type_info const * __info = nullptr,
|
|
const void* __fallback_info = nullptr)
|
|
{
|
|
return __h(__a, this, __other, __info, __fallback_info);
|
|
}
|
|
|
|
template <class>
|
|
friend struct __any_imp::_SmallHandler;
|
|
template <class>
|
|
friend struct __any_imp::_LargeHandler;
|
|
|
|
template <class _ValueType>
|
|
friend add_pointer_t<add_const_t<_ValueType>>
|
|
any_cast(any const *) _NOEXCEPT;
|
|
|
|
template <class _ValueType>
|
|
friend add_pointer_t<_ValueType>
|
|
any_cast(any *) _NOEXCEPT;
|
|
|
|
_HandleFuncPtr __h = nullptr;
|
|
_Storage __s;
|
|
};
|
|
|
|
namespace __any_imp
|
|
{
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS _SmallHandler
|
|
{
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __handle(_Action __act, any const * __this, any * __other,
|
|
type_info const * __info, const void* __fallback_info)
|
|
{
|
|
switch (__act)
|
|
{
|
|
case _Action::_Destroy:
|
|
__destroy(const_cast<any &>(*__this));
|
|
return nullptr;
|
|
case _Action::_Copy:
|
|
__copy(*__this, *__other);
|
|
return nullptr;
|
|
case _Action::_Move:
|
|
__move(const_cast<any &>(*__this), *__other);
|
|
return nullptr;
|
|
case _Action::_Get:
|
|
return __get(const_cast<any &>(*__this), __info, __fallback_info);
|
|
case _Action::_TypeInfo:
|
|
return __type_info();
|
|
}
|
|
}
|
|
|
|
template <class ..._Args>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static _Tp& __create(any & __dest, _Args&&... __args) {
|
|
_Tp* __ret = ::new (static_cast<void*>(&__dest.__s.__buf)) _Tp(_VSTD::forward<_Args>(__args)...);
|
|
__dest.__h = &_SmallHandler::__handle;
|
|
return *__ret;
|
|
}
|
|
|
|
private:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __destroy(any & __this) {
|
|
_Tp & __value = *static_cast<_Tp *>(static_cast<void*>(&__this.__s.__buf));
|
|
__value.~_Tp();
|
|
__this.__h = nullptr;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __copy(any const & __this, any & __dest) {
|
|
_SmallHandler::__create(__dest, *static_cast<_Tp const *>(
|
|
static_cast<void const *>(&__this.__s.__buf)));
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __move(any & __this, any & __dest) {
|
|
_SmallHandler::__create(__dest, _VSTD::move(
|
|
*static_cast<_Tp*>(static_cast<void*>(&__this.__s.__buf))));
|
|
__destroy(__this);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __get(any & __this,
|
|
type_info const * __info,
|
|
const void* __fallback_id)
|
|
{
|
|
if (__any_imp::__compare_typeid<_Tp>(__info, __fallback_id))
|
|
return static_cast<void*>(&__this.__s.__buf);
|
|
return nullptr;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __type_info()
|
|
{
|
|
#if !defined(_LIBCPP_NO_RTTI)
|
|
return const_cast<void*>(static_cast<void const *>(&typeid(_Tp)));
|
|
#else
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
};
|
|
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS _LargeHandler
|
|
{
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __handle(_Action __act, any const * __this,
|
|
any * __other, type_info const * __info,
|
|
void const* __fallback_info)
|
|
{
|
|
switch (__act)
|
|
{
|
|
case _Action::_Destroy:
|
|
__destroy(const_cast<any &>(*__this));
|
|
return nullptr;
|
|
case _Action::_Copy:
|
|
__copy(*__this, *__other);
|
|
return nullptr;
|
|
case _Action::_Move:
|
|
__move(const_cast<any &>(*__this), *__other);
|
|
return nullptr;
|
|
case _Action::_Get:
|
|
return __get(const_cast<any &>(*__this), __info, __fallback_info);
|
|
case _Action::_TypeInfo:
|
|
return __type_info();
|
|
}
|
|
}
|
|
|
|
template <class ..._Args>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static _Tp& __create(any & __dest, _Args&&... __args) {
|
|
typedef allocator<_Tp> _Alloc;
|
|
typedef __allocator_destructor<_Alloc> _Dp;
|
|
_Alloc __a;
|
|
unique_ptr<_Tp, _Dp> __hold(__a.allocate(1), _Dp(__a, 1));
|
|
_Tp* __ret = ::new ((void*)__hold.get()) _Tp(_VSTD::forward<_Args>(__args)...);
|
|
__dest.__s.__ptr = __hold.release();
|
|
__dest.__h = &_LargeHandler::__handle;
|
|
return *__ret;
|
|
}
|
|
|
|
private:
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __destroy(any & __this){
|
|
delete static_cast<_Tp*>(__this.__s.__ptr);
|
|
__this.__h = nullptr;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __copy(any const & __this, any & __dest) {
|
|
_LargeHandler::__create(__dest, *static_cast<_Tp const *>(__this.__s.__ptr));
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void __move(any & __this, any & __dest) {
|
|
__dest.__s.__ptr = __this.__s.__ptr;
|
|
__dest.__h = &_LargeHandler::__handle;
|
|
__this.__h = nullptr;
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __get(any & __this, type_info const * __info,
|
|
void const* __fallback_info)
|
|
{
|
|
if (__any_imp::__compare_typeid<_Tp>(__info, __fallback_info))
|
|
return static_cast<void*>(__this.__s.__ptr);
|
|
return nullptr;
|
|
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static void* __type_info()
|
|
{
|
|
#if !defined(_LIBCPP_NO_RTTI)
|
|
return const_cast<void*>(static_cast<void const *>(&typeid(_Tp)));
|
|
#else
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
};
|
|
|
|
} // namespace __any_imp
|
|
|
|
|
|
template <class _ValueType, class _Tp, class>
|
|
any::any(_ValueType && __v) : __h(nullptr)
|
|
{
|
|
__any_imp::_Handler<_Tp>::__create(*this, _VSTD::forward<_ValueType>(__v));
|
|
}
|
|
|
|
template <class _ValueType, class ..._Args, class _Tp, class>
|
|
any::any(in_place_type_t<_ValueType>, _Args&&... __args) {
|
|
__any_imp::_Handler<_Tp>::__create(*this, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _ValueType, class _Up, class ..._Args, class _Tp, class>
|
|
any::any(in_place_type_t<_ValueType>, initializer_list<_Up> __il, _Args&&... __args) {
|
|
__any_imp::_Handler<_Tp>::__create(*this, __il, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _ValueType, class, class>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
any & any::operator=(_ValueType && __v)
|
|
{
|
|
any(_VSTD::forward<_ValueType>(__v)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
template <class _ValueType, class ..._Args, class _Tp, class>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_Tp& any::emplace(_Args&&... __args) {
|
|
reset();
|
|
return __any_imp::_Handler<_Tp>::__create(*this, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _ValueType, class _Up, class ..._Args, class _Tp, class>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_Tp& any::emplace(initializer_list<_Up> __il, _Args&&... __args) {
|
|
reset();
|
|
return __any_imp::_Handler<_Tp>::__create(*this, __il, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void any::swap(any & __rhs) _NOEXCEPT
|
|
{
|
|
if (this == &__rhs)
|
|
return;
|
|
if (__h && __rhs.__h) {
|
|
any __tmp;
|
|
__rhs.__call(_Action::_Move, &__tmp);
|
|
this->__call(_Action::_Move, &__rhs);
|
|
__tmp.__call(_Action::_Move, this);
|
|
}
|
|
else if (__h) {
|
|
this->__call(_Action::_Move, &__rhs);
|
|
}
|
|
else if (__rhs.__h) {
|
|
__rhs.__call(_Action::_Move, this);
|
|
}
|
|
}
|
|
|
|
// 6.4 Non-member functions
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void swap(any & __lhs, any & __rhs) _NOEXCEPT
|
|
{
|
|
__lhs.swap(__rhs);
|
|
}
|
|
|
|
template <class _Tp, class ..._Args>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
any make_any(_Args&&... __args) {
|
|
return any(in_place_type<_Tp>, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _Tp, class _Up, class ..._Args>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
any make_any(initializer_list<_Up> __il, _Args&&... __args) {
|
|
return any(in_place_type<_Tp>, __il, _VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _ValueType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
|
|
_ValueType any_cast(any const & __v)
|
|
{
|
|
using _RawValueType = __uncvref_t<_ValueType>;
|
|
static_assert(is_constructible<_ValueType, _RawValueType const &>::value,
|
|
"ValueType is required to be a const lvalue reference "
|
|
"or a CopyConstructible type");
|
|
auto __tmp = _VSTD::any_cast<add_const_t<_RawValueType>>(&__v);
|
|
if (__tmp == nullptr)
|
|
__throw_bad_any_cast();
|
|
return static_cast<_ValueType>(*__tmp);
|
|
}
|
|
|
|
template <class _ValueType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
|
|
_ValueType any_cast(any & __v)
|
|
{
|
|
using _RawValueType = __uncvref_t<_ValueType>;
|
|
static_assert(is_constructible<_ValueType, _RawValueType &>::value,
|
|
"ValueType is required to be an lvalue reference "
|
|
"or a CopyConstructible type");
|
|
auto __tmp = _VSTD::any_cast<_RawValueType>(&__v);
|
|
if (__tmp == nullptr)
|
|
__throw_bad_any_cast();
|
|
return static_cast<_ValueType>(*__tmp);
|
|
}
|
|
|
|
template <class _ValueType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
|
|
_ValueType any_cast(any && __v)
|
|
{
|
|
using _RawValueType = __uncvref_t<_ValueType>;
|
|
static_assert(is_constructible<_ValueType, _RawValueType>::value,
|
|
"ValueType is required to be an rvalue reference "
|
|
"or a CopyConstructible type");
|
|
auto __tmp = _VSTD::any_cast<_RawValueType>(&__v);
|
|
if (__tmp == nullptr)
|
|
__throw_bad_any_cast();
|
|
return static_cast<_ValueType>(_VSTD::move(*__tmp));
|
|
}
|
|
|
|
template <class _ValueType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
add_pointer_t<add_const_t<_ValueType>>
|
|
any_cast(any const * __any) _NOEXCEPT
|
|
{
|
|
static_assert(!is_reference<_ValueType>::value,
|
|
"_ValueType may not be a reference.");
|
|
return _VSTD::any_cast<_ValueType>(const_cast<any *>(__any));
|
|
}
|
|
|
|
template <class _RetType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_RetType __pointer_or_func_cast(void* __p, /*IsFunction*/false_type) noexcept {
|
|
return static_cast<_RetType>(__p);
|
|
}
|
|
|
|
template <class _RetType>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_RetType __pointer_or_func_cast(void*, /*IsFunction*/true_type) noexcept {
|
|
return nullptr;
|
|
}
|
|
|
|
template <class _ValueType>
|
|
add_pointer_t<_ValueType>
|
|
any_cast(any * __any) _NOEXCEPT
|
|
{
|
|
using __any_imp::_Action;
|
|
static_assert(!is_reference<_ValueType>::value,
|
|
"_ValueType may not be a reference.");
|
|
typedef typename add_pointer<_ValueType>::type _ReturnType;
|
|
if (__any && __any->__h) {
|
|
void *__p = __any->__call(_Action::_Get, nullptr,
|
|
#if !defined(_LIBCPP_NO_RTTI)
|
|
&typeid(_ValueType),
|
|
#else
|
|
nullptr,
|
|
#endif
|
|
__any_imp::__get_fallback_typeid<_ValueType>());
|
|
return _VSTD::__pointer_or_func_cast<_ReturnType>(
|
|
__p, is_function<_ValueType>{});
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_ANY
|