std::experimental::unique_resource<R, D>::operator=

 

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Technical specifications

Symbols index

External libraries

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

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Library fundamentals v3

experimental::scope_exit

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experimental::unique_resource

 

std::experimental::unique_resource

Member functions

unique_resource::unique_resource

unique_resource::~unique_resource

unique_resource::operator=

Modifiers

unique_resource::release

unique_resource::reset

Observers

unique_resource::get

unique_resource::get_deleter

unique_resource::operator*unique_resource::operator->

Non-member functions

make_unique_resource_checked

Deduction guides

 

unique_resource& operator=( unique_resource&& other )     noexcept(/*see below*/);		(library fundamentals TS v3)

Move assignment operator. Replaces the managed resource and the deleter with other's.

Formally, let RS be the type of stored resource handle:

• First, calls reset() to dispose the currently owned resource, if any.
• Then assigns the stored resource handle and the deleter with other's. std::move is applied to the stored resource handle or the deleter of other if std::is_nothrow_move_assignable_v<RS> or std::is_nothrow_move_assignable_v<D> is true respectively. Assignment of the stored resource handle is executed first, unless std::is_nothrow_move_assignable_v<D> is false and std::is_nothrow_move_assignable_v<RS> is true.
• Finally, sets *this to own the resource if and only if other owned it before assignment, and other not to own the resource.

If std::is_nothrow_move_assignable_v<RS> is true, RS shall satisfy the MoveAssignable requirements; otherwise RS shall satisfy the CopyAssignable requirements. If std::is_nothrow_move_assignable_v<D> is true, D shall satisfy the MoveAssignable requirements; otherwise D shall satisfy the CopyAssignable requirements. Failing to satisfy above requirements results in undefined behavior.

Parameters

other

-

resource wrapper from which ownership will be transferred

Return value

*this

Exceptions

Any exception thrown in copy-assignment.

noexcept specification:  

noexcept(std::is_nothrow_move_assignable_v<RS> && std::is_nothrow_move_assignable_v<D>)

Notes

If a copy of a member throws an exception, this mechanism leaves other intact and *this in the released state.

See also

reset	disposes or replaces the managed resource (public member function)
operator=	assigns the unique_ptr (public member function of std::unique_ptr<T,Deleter>)