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

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< cpp‎ | memory‎ | shared ptr
Revision as of 14:45, 2 November 2012 by P12bot (Talk | contribs)

 
 
 
 
 

Template:ddcl list begin <tr class="t-dcl ">

<td >
template< class T, class U >
shared_ptr<T> static_pointer_cast( const shared_ptr<U>& r );
</td>

<td > (1) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
template< class T, class U >
shared_ptr<T> dynamic_pointer_cast( const shared_ptr<U>& r );
</td>

<td > (2) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
template< class T, class U >
shared_ptr<T> const_pointer_cast( const shared_ptr<U>& r );
</td>

<td > (3) </td> <td > (since C++11) </td> </tr>

Template:ddcl list end 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.

Parameters

r - The pointer to convert

Exceptions

noexcept specification:  
noexcept