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 > (library fundamentals
std::experimental::shared_ptr<T> static_pointer_cast( (1) TS)
const std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U > (library fundamentals
std::experimental::shared_ptr<T> dynamic_pointer_cast( (2) TS)
const std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U > (library fundamentals
std::experimental::shared_ptr<T> const_pointer_cast( const (3) TS)
std::experimental::shared_ptr<U>& r ) noexcept;
template< class T, class U > (library fundamentals
std::experimental::shared_ptr<T> reinterpret_pointer_cast( (4) TS)
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)