std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,std::experimental::const_pointer_cast,std::experimental::reinterpret_pointer_cast (3) - Linux Man Pages

std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,std::experimental::const_pointer_cast,std::experimental::reinterpret_pointer_cast: std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,std::experimental::const_pointer_cast,std::experimental::reinterpret_pointer_cast

NAME

std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,std::experimental::const_pointer_cast,std::experimental::reinterpret_pointer_cast - std::experimental::static_pointer_cast,std::experimental::dynamic_pointer_cast,std::experimental::const_pointer_cast,std::experimental::reinterpret_pointer_cast

Synopsis


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


                         constructs new shared_ptr
constructor (public member function)


static_pointer_cast
dynamic_pointer_cast
const_pointer_cast
reinterpret_pointer_cast applies static_cast, dynamic_cast, const_cast, or reinterpret_cast to the stored pointer
                         (function template)


(C++17)