Namespaces
Variants
Views
Actions

std::shared_ptr::operator=

From cppreference.com
< cpp‎ | memory‎ | shared ptr
Revision as of 23:13, 31 May 2013 by P12bot (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
 
 
 
 
 
shared_ptr& operator=( const shared_ptr& r );
(1)
template< class Y >
shared_ptr& operator=( const shared_ptr<Y>& r );
(1)
shared_ptr& operator=( shared_ptr&& r );
(2)
template< class Y >
shared_ptr& operator=( shared_ptr<Y>&& r );
(2)
template< class Y >
shared_ptr& operator=( std::auto_ptr<Y>&& r );
(3)
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.

1) Shares ownership of the object managed by r. If r manages no object, *this manages no object too. The templated overload doesn't participate in the overload resolution if Y* is not implicitly convertible to T*. Equivalent to shared_ptr<T> p(r).swap(*this).

2) Move-assigns a shared_ptr from r. After the assignment, *this contains a copy of the previous state of r, r is empty. The templated overload doesn't participate in the overload resolution if Y* is not implicitly convertible to T*. Equivalent to shared_ptr<T> p(std::move(r)).swap(*this).

3)

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> p(std::move(r)).swap(*this).

Contents

[edit] Parameters

r - another smart pointer to share the ownership to or acquire the ownership from

[edit] Return value

*this

[edit] Notes

The implementation may meet the requirements without creating a temporary shared_ptr object.

[edit] Exceptions

1-2)
noexcept specification:  
noexcept
  

3) (none)

4-5)
noexcept specification:  
noexcept
  

[edit] Example

[edit] See also

replaces the managed object
(public member function) [edit]