std::static_pointer_cast, std::dynamic_pointer_cast, std::const_pointer_cast

std::static_pointer_cast,
std::dynamic_pointer_cast,
std::const_pointer_cast

C++

Utilities library

Dynamic memory management

std::shared_ptr

template< class T, class U > shared_ptr<T> static_pointer_cast( const shared_ptr<U>& r );	(1)	(since C++11)
template< class T, class U > shared_ptr<T> dynamic_pointer_cast( const shared_ptr<U>& r );	(2)	(since C++11)
template< class T, class U > shared_ptr<T> const_pointer_cast( const shared_ptr<U>& r );	(3)	(since C++11)

Creates a new instance of std::shared_ptr whose managed object type is obtained from the

r

's managed object type using a cast expression. Both smart pointers will share the ownership of the managed object.

The resulting std::shared_ptr's managed object will be obtained by calling (in respective order):

1)

static_cast<T*>(r.get())

.
2)

dynamic_cast<T*>(r.get())

(If the result of the

dynamic_cast

is 0, the returned shared_ptr will be empty).
3)

const_cast<T*>(r.get())

.
In any case, if the parameter

r

is an empty std::shared_ptr the result will be a new empty
std::shared_ptr.

Parameters

r

-

The pointer to convert

Exceptions

noexcept specification:
noexcept