NAME¶

std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast, - std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,

Synopsis¶

template< class T, class U >

std::experimental::shared_ptr<T> (1) (library fundamentals
TS)
static_pointer_cast( const
std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U >

std::experimental::shared_ptr<T> (2) (library fundamentals
TS)
dynamic_pointer_cast( const
std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U >

std::experimental::shared_ptr<T> (3) (library fundamentals
TS)
const_pointer_cast( const
std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U >

std::experimental::shared_ptr<T> (4) (library fundamentals
TS)
reinterpret_pointer_cast( const
std::experimental::shared_ptr<U>& r ) noexcept;

Creates a new instance of std::experimental::shared_ptr whose stored pointer is
obtained from r's stored pointer using a cast expression. If r is empty, so is the
new shared_ptr (but its stored pointer is not necessarily null).

Otherwise, the new shared_ptr will share ownership with r, except that it is empty
if the dynamic_cast performed by dynamic_pointer_cast returns a null pointer.

Let Y be typename std::experimental::shared_ptr<T>::element_type, then the resulting
std::experimental::shared_ptr's stored pointer will be obtained by calling (in
respective order):

1) static_cast<Y*>(r.get()).
2) dynamic_cast<Y*>(r.get()) (if the result of the dynamic_cast is a null pointer
value, the returned shared_ptr will be empty).
3) const_cast<Y*>(r.get()).
4) reinterpret_cast<Y*>(r.get()).

The behavior of these functions is undefined unless the corresponding cast from U*
to T* is well formed:

1) The behavior is undefined unless static_cast<T*>((U*)nullptr) is well formed.
2) The behavior is undefined unless dynamic_cast<T*>((U*)nullptr) is well formed.
3) The behavior is undefined unless const_cast<T*>((U*)nullptr) is well formed.
4) The behavior is undefined unless reinterpret_cast<T*>((U*)nullptr) is well
formed.

Parameters¶

r - the pointer to convert

Example¶

This section is incomplete
Reason: no example

See also¶

constructor constructs new shared_ptr
(public member function)
static_pointer_cast
dynamic_pointer_cast applies static_cast, dynamic_cast, const_cast, or
const_pointer_cast reinterpret_cast to the stored pointer
reinterpret_pointer_cast (function template)
(C++17)

Categories:¶

* Noindexed pages
* Todo no example