std::experimental::function<R(Args...)>::operator= (3) - Linux Manuals

std::experimental::function<R(Args...)>::operator=: std::experimental::function<R(Args...)>::operator=

NAME

std::experimental::function<R(Args...)>::operator= - std::experimental::function<R(Args...)>::operator=

Synopsis

function& operator=( const function& other ); (1) (library fundamentals TS)
function& operator=( function&& other ); (2) (library fundamentals TS)
function& operator=( std::nullptr_t ) noexcept; (3) (library fundamentals TS)
template< class F > (4) (library fundamentals TS)
function& operator=( F&& f );
template< class F > (5) (library fundamentals TS)
function& operator=( std::reference_wrapper<F> f );

Assigns a new target to std::experimental::function. In the description below, let ALLOCATOR_OF(f) be the allocator specified in the construction of f, or the value of std::experimental::pmr::get_default_resource() at the time of construction if no allocator was specified.
1) Assigns a copy of target of other, as if by executing function(std::allocator_arg, ALLOCATOR_OF(*this), other).swap(*this);
2) Moves the target of other to *this, as if by executing function(std::allocator_arg, ALLOCATOR_OF(*this), std::move(other)).swap(*this);. other is in a valid state with an unspecified value.
3) Destroys the target of *this. *this is empty after the call. The memory resource returned by get_memory_resource() after the assignment is equivalent to the memory resource before the assignment, but the address may change.
4) Sets the target of *this to the callable f, as if by executing function(std::allocator_arg, ALLOCATOR_OF(*this),std::forward<F>(f)).swap(*this);. This operator does not participate in overload resolution unless f is Callable for argument types Args... and return type R.
5) Sets the target of *this to a copy of f, as if by executing function(std::allocator_arg, ALLOCATOR_OF(*this), f).swap(*this);

Parameters

other - another std::experimental::function object to copy or move from
f - a callable to initialize the target with

Type requirements

Return value

*this

Exceptions

1-2,4-5) (none)