std::static_pointer_cast, std::dynamic_pointer_cast, std::const_pointer_cast
From cppreference.com
< cpp | memory | 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) |
Will return a new instance of std::shared_ptr with a casted managed object type from the r's managed object type. 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.
[edit] Parameters
| r | - | The pointer to convert |