std::unique_ptr< _Tp, _Dp >(3)

NAME
std::unique_ptr< _Tp, _Dp > - A move-only smart pointer that manages unique ownership of a resource.

SYNOPSIS

#include <memory>

  Public Types
using deleter_type
using element_type
using pointer

  Public Member Functions
template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> constexpr unique_ptr () noexcept
Default constructor, creates a unique_ptr that owns nothing.
template<typename _Up, typename = _Require<is_convertible<_Up*, pointer>, is_same<_Dp, default_delete<_Tp>>>> unique_ptr (auto_ptr< _Up > &&__u) noexcept
Converting constructor from auto_ptr.
unique_ptr (const unique_ptr &)=delete
template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> constexpr unique_ptr (nullptr_t) noexcept
Creates a unique_ptr that owns nothing.
template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> constexpr unique_ptr (pointer __p) noexcept
template<typename _Del = deleter_type, typename = _Require<is_move_constructible<_Del>>> constexpr unique_ptr (pointer __p, __enable_if_t<!is_lvalue_reference< _Del >::value, _Del && > __d) noexcept
template<typename _Del = deleter_type, typename = _Require<is_copy_constructible<_Del>>> constexpr unique_ptr (pointer __p, const deleter_type &__d) noexcept
template<typename _Del = deleter_type, typename _DelUnref = typename remove_reference<_Del>::type> constexpr unique_ptr (pointer, __enable_if_t< is_lvalue_reference< _Del >::value, _DelUnref && >)=delete
unique_ptr (unique_ptr &&)=default
Move constructor.
template<typename _Up, typename _Ep, typename = _Require< __safe_conversion_up<_Up, _Ep>, __conditional_t<is_reference<_Dp>::value, is_same<_Ep, _Dp>, is_convertible<_Ep, _Dp>>>> constexpr unique_ptr (unique_ptr< _Up, _Ep > &&__u) noexcept
Converting constructor from another type.
~unique_ptr () noexcept
Destructor, invokes the deleter if the stored pointer is not null.
constexpr pointer get () const noexcept
Return the stored pointer.
constexpr const deleter_type & get_deleter () const noexcept
Return a reference to the stored deleter.
constexpr deleter_type & get_deleter () noexcept
Return a reference to the stored deleter.
constexpr operator bool () const noexcept
Return true if the stored pointer is not null.
constexpr add_lvalue_reference< element_type >::type operator* () const noexcept(noexcept(*std::declval< pointer >()))
Dereference the stored pointer.
constexpr pointer operator-> () const noexcept
Return the stored pointer.
unique_ptr & operator= (const unique_ptr &)=delete
constexpr unique_ptr & operator= (nullptr_t) noexcept
Reset the unique_ptr to empty, invoking the deleter if necessary.
unique_ptr & operator= (unique_ptr &&)=default
Move assignment operator.
template<typename _Up, typename _Ep> constexpr enable_if< __and_< __safe_conversion_up< _Up, _Ep >, is_assignable< deleter_type &, _Ep && > >::value, unique_ptr & >::type operator= (unique_ptr< _Up, _Ep > &&__u) noexcept
Assignment from another type.
constexpr pointer release () noexcept
Release ownership of any stored pointer.
constexpr void reset (pointer __p=pointer()) noexcept
Replace the stored pointer.
constexpr void swap (unique_ptr &__u) noexcept
Exchange the pointer and deleter with another object.

  Related Symbols
(Note that these are not member symbols.)
template<typename _CharT, typename _Traits, typename _Tp, typename _Dp> basic_ostream< _CharT, _Traits > & operator<< (basic_ostream< _CharT, _Traits > &__os, const unique_ptr< _Tp, _Dp > &__p)
Stream output operator for unique_ptr.
template<typename _Tp, typename _Dp> constexpr enable_if< __is_swappable< _Dp >::value >::type swap (unique_ptr< _Tp, _Dp > &__x, unique_ptr< _Tp, _Dp > &__y) noexcept
Swap overload for unique_ptr.

Detailed Description

  template<typename _Tp, typename _Dp = default_delete<_Tp>>
class std::unique_ptr< _Tp, _Dp >"A move-only smart pointer that manages unique ownership of a resource.

Since
    C++11

Constructor & Destructor Documentation

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> std::unique_ptr< _Tp, _Dp >::unique_ptr () [inline], [constexpr], [noexcept]

Default constructor, creates a unique_ptr that owns nothing.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> std::unique_ptr< _Tp, _Dp >::unique_ptr (pointer __p) [inline], [explicit], [constexpr], [noexcept]
Takes ownership of a pointer.

Parameters
    __p A pointer to an object of element_type

The deleter will be value-initialized.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Del = deleter_type, typename = _Require<is_copy_constructible<_Del>>> std::unique_ptr< _Tp, _Dp >::unique_ptr (pointer __p, const deleter_type & __d) [inline], [constexpr], [noexcept]
Takes ownership of a pointer.

Parameters
    __p A pointer to an object of element_type
    __d A reference to a deleter.

The deleter will be initialized with __d

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Del = deleter_type, typename = _Require<is_move_constructible<_Del>>> std::unique_ptr< _Tp, _Dp >::unique_ptr (pointer __p, __enable_if_t<!is_lvalue_reference< _Del >::value, _Del && > __d) [inline], [constexpr], [noexcept]
Takes ownership of a pointer.

Parameters
    __p A pointer to an object of element_type
    __d An rvalue reference to a (non-reference) deleter.

The deleter will be initialized with std::move(__d)

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> std::unique_ptr< _Tp, _Dp >::unique_ptr (nullptr_t ) [inline], [constexpr], [noexcept]

Creates a unique_ptr that owns nothing.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> std::unique_ptr< _Tp, _Dp >::unique_ptr (unique_ptr< _Tp, _Dp > && ) [default]

Move constructor.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Up, typename _Ep, typename = _Require< __safe_conversion_up<_Up, _Ep>, __conditional_t<is_reference<_Dp>::value, is_same<_Ep, _Dp>, is_convertible<_Ep, _Dp>>>> std::unique_ptr< _Tp, _Dp >::unique_ptr (unique_ptr< _Up, _Ep > && __u) [inline], [constexpr], [noexcept]

Converting constructor from another type. Requires that the pointer owned by __u is convertible to the type of pointer owned by this object, __u does not own an array, and __u has a compatible deleter type.

  template<typename _Tp, typename _Dp> template<typename _Up, typename> std::unique_ptr< _Tp, _Dp >::unique_ptr (auto_ptr< _Up > && __u) [inline], [noexcept]

Converting constructor from auto_ptr.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> std::unique_ptr< _Tp, _Dp >::~unique_ptr () [inline], [noexcept]

Destructor, invokes the deleter if the stored pointer is not null.

Member Function Documentation

  template<typename _Tp, typename _Dp = default_delete<_Tp>> pointer std::unique_ptr< _Tp, _Dp >::get () const [inline], [constexpr], [noexcept]

Return the stored pointer.

Referenced by std::unique_ptr< _State >::operator bool(), std::unique_ptr< _State >::operator*(), std::unique_ptr< _State >::operator->(), std::operator<(), std::operator<(), std::operator<(), std::unique_ptr< _State >::operator<<(), std::operator==(), std::operator>(), and std::operator>().

  template<typename _Tp, typename _Dp = default_delete<_Tp>> const deleter_type & std::unique_ptr< _Tp, _Dp >::get_deleter () const [inline], [constexpr], [noexcept]

Return a reference to the stored deleter.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> deleter_type & std::unique_ptr< _Tp, _Dp >::get_deleter () [inline], [constexpr], [noexcept]

Return a reference to the stored deleter.

Referenced by std::unique_ptr< _State >::~unique_ptr(), and std::unique_ptr< _State >::operator=().

  template<typename _Tp, typename _Dp = default_delete<_Tp>> std::unique_ptr< _Tp, _Dp >::operator bool () const [inline], [explicit], [constexpr], [noexcept]

Return true if the stored pointer is not null.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> add_lvalue_reference< element_type >::type std::unique_ptr< _Tp, _Dp >::operator* () const [inline], [constexpr], [noexcept]

Dereference the stored pointer.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> pointer std::unique_ptr< _Tp, _Dp >::operator-> () const [inline], [constexpr], [noexcept]

Return the stored pointer.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> unique_ptr & std::unique_ptr< _Tp, _Dp >::operator= (nullptr_t ) [inline], [constexpr], [noexcept]

Reset the unique_ptr to empty, invoking the deleter if necessary.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> unique_ptr & std::unique_ptr< _Tp, _Dp >::operator= (unique_ptr< _Tp, _Dp > && ) [default]

Move assignment operator. Invokes the deleter if this object owns a pointer.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> template<typename _Up, typename _Ep> enable_if< __and_< __safe_conversion_up< _Up, _Ep >, is_assignable< deleter_type &, _Ep && > >::value, unique_ptr & >::type std::unique_ptr< _Tp, _Dp >::operator= (unique_ptr< _Up, _Ep > && __u) [inline], [constexpr], [noexcept]

Assignment from another type.

Parameters
    __u The object to transfer ownership from, which owns a convertible pointer to a non-array object.

Invokes the deleter if this object owns a pointer.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> pointer std::unique_ptr< _Tp, _Dp >::release () [inline], [constexpr], [noexcept]

Release ownership of any stored pointer.

  template<typename _Tp, typename _Dp = default_delete<_Tp>> void std::unique_ptr< _Tp, _Dp >::reset (pointer __p = pointer()) [inline], [constexpr], [noexcept]

Replace the stored pointer.

Parameters
    __p The new pointer to store.

The deleter will be invoked if a pointer is already owned.

Referenced by std::unique_ptr< _State >::operator=(), and std::unique_ptr< _State >::operator=().

  template<typename _Tp, typename _Dp = default_delete<_Tp>> void std::unique_ptr< _Tp, _Dp >::swap (unique_ptr< _Tp, _Dp > & __u) [inline], [constexpr], [noexcept]

Exchange the pointer and deleter with another object.

Author

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