std::shared_ptr::operator=
| shared_ptr& operator=( const shared_ptr& r ) noexcept; |
(1) | |
| template< class Y > shared_ptr& operator=( const shared_ptr<Y>& r ) noexcept; |
(1) | |
| shared_ptr& operator=( shared_ptr&& r ) noexcept; |
(2) | |
| template< class Y > shared_ptr& operator=( shared_ptr<Y>&& r ) noexcept; |
(2) | |
| template< class Y > shared_ptr& operator=( std::auto_ptr<Y>&& r ); |
(3) | (deprecated in C++11) (removed in C++17) |
| template< class Y, class Deleter > shared_ptr& operator=( std::unique_ptr<Y,Deleter>&& r ); |
(4) | |
Replaces the managed object with the one managed by r.
If *this already owns an object and it is the last shared_ptr owning it, and r is not the same as *this, the object is destroyed through the owned deleter.
1) Shares ownership of the object managed by r. If r manages no object, *this manages no object too. Equivalent to shared_ptr<T>(r).swap(*this).
2) Move-assigns a shared_ptr from r. After the assignment, *this contains a copy of the previous state of r, and r is empty. Equivalent to shared_ptr<T>(std::move(r)).swap(*this).
3) Transfers the ownership of the object managed by r to *this. If r manages no object, *this manages no object too. After the assignment, *this contains the pointer previously held by r, and use_count()==1; also r is empty. Equivalent to shared_ptr<T>(r).swap(*this).
4) Transfers the ownership of the object managed by r to *this. The deleter associated to r is stored for future deletion of the managed object. r manages no object after the call. Equivalent to shared_ptr<T>(std::move(r)).swap(*this).
Parameters
| r | - | another smart pointer to share the ownership to or acquire the ownership from |
Return value
*this
Notes
The implementation may meet the requirements without creating a temporary shared_ptr object.
Exceptions
3) (none)
4) may throw exception
Example
| This section is incomplete Reason: no example |
See also
| replaces the managed object (public member function) |