std::auto_ptr<T>::auto_ptr

 

C++

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Technical Specifications

 

Utilities library

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rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=
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strong_order weak_order partial_order strong_equal weak_equal	strong_ordering weak_ordering partial_ordering strong_equality weak_equality	is_eqis_neqis_ltis_lteqis_gtis_gteq
common_comparison_category
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pair tuple (C++11) apply (C++17) make_from_tuple (C++17)	optional (C++17) any (C++17) variant (C++17)
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swap
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Dynamic memory management

Smart pointers unique_ptr (C++11) shared_ptr (C++11) weak_ptr (C++11) auto_ptr (until C++17) owner_less (C++11) enable_shared_from_this (C++11) bad_weak_ptr (C++11) default_delete (C++11) Allocators allocator allocator_traits (C++11) allocator_arg_t (C++11) allocator_arg (C++11) uses_allocator (C++11) uses_allocator_construction_args (C++20) make_obj_using_allocator (C++20) uninitialized_construct_using_allocator (C++20) scoped_allocator_adaptor (C++11) pmr::polymorphic_allocator (C++17) Memory resources pmr::memory_resource (C++17) pmr::get_default_resource (C++17) pmr::set_default_resource (C++17) pmr::new_delete_resource (C++17) pmr::null_memory_resource (C++17) pmr::synchronized_pool_resource (C++17) pmr::unsynchronized_pool_resource (C++17) pmr::monotonic_buffer_resource (C++17) pmr::pool_options (C++17)

Uninitialized storage uninitialized_copy uninitialized_fill uninitialized_move (C++17) uninitialized_default_construct (C++17) uninitialized_value_construct (C++17) destroy (C++17) uninitialized_copy_n (C++11) uninitialized_fill_n uninitialized_move_n (C++17) uninitialized_default_construct_n (C++17) uninitialized_value_construct_n (C++17) destroy_n (C++17) destroy_at (C++17) raw_storage_iterator (until C++20) get_temporary_buffer (until C++20) return_temporary_buffer (until C++20) Garbage collection support declare_reachable (C++11) undeclare_reachable (C++11) declare_no_pointers (C++11) undeclare_no_pointers (C++11) pointer_safety (C++11) get_pointer_safety (C++11) Miscellaneous pointer_traits (C++11) to_address (C++20) addressof (C++11) align (C++11) assume_aligned (C++20) C Library malloc aligned_alloc (C++17) calloc realloc free Low level memory management

 

std::auto_ptr

Member functions

auto_ptr::auto_ptr

auto_ptr::~auto_ptr

auto_ptr::operator=

auto_ptr::operator*auto_ptr::operator->

auto_ptr::get

auto_ptr::release

auto_ptr::reset

auto_ptr::operator auto_ptr<Y>auto_ptr::operator auto_ptr_ref<Y>

 

explicit auto_ptr( X* p = 0 ) throw();	(1)	(deprecated in C++11) (removed in C++17)
auto_ptr( auto_ptr& r ) throw();	(2)	(deprecated in C++11) (removed in C++17)
template< class Y > auto_ptr( auto_ptr<Y>& r ) throw();	(3)	(deprecated in C++11) (removed in C++17)
auto_ptr( auto_ptr_ref<X> m ) throw();	(4)	(deprecated in C++11) (removed in C++17)

Constructs the auto_ptr from a pointer that refers to the object to manage.

1) Constructs the auto_ptr with pointer p.

2) Constructs the auto_ptr with the pointer held in r. r.release() is called to acquire the ownership of the object.

3) Same as (2). Y* must be implicitly convertible to T*.

4) Constructs the auto_ptr with the pointer held in the auto_ptr instance referred to by m. p.release() is called for the auto_ptr p that m holds to acquire the ownership of the object.

auto_ptr_ref is an implementation-defined type that holds a reference to auto_ptr. std::auto_ptr is implicitly convertible to and assignable from this type. The implementation is allowed to provide the template with a different name or implement equivalent functionality in other ways.

Parameters

p	-	a pointer to an object to manage
r	-	another auto_ptr to transfer the ownership of the object from
m	-	an implementation-defined type that holds a reference to auto_ptr

Notes

The constructor and the copy assignment operator from auto_ptr_ref is provided to allow copy-constructing and assigning std::auto_ptr from nameless temporaries. Since its copy constructor and copy assignment operator take the argument as non-const reference, they cannot bind rvalue arguments directly. However, a user-defined conversion can be executed (which releases the original auto_ptr), followed by a call to the constructor or copy-assignment operator that take auto_ptr_ref by value. This is an early implementation of move semantics.