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std::experimental::function::operator=

From cppreference.com
 
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals 2 TS)
Extensions for parallelism (parallelism TS)
Extensions for concurrency (concurrency TS)
Concepts (concepts TS)
Ranges (ranges TS)
Special mathematical functions (special math TR)
 
 
 
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 >
function& operator=( F&& f );
(4) (library fundamentals TS)
template< class F >
function& operator=( std::reference_wrapper<F> f );
(5) (library fundamentals TS)

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);

[edit] Parameters

other - another std::experimental::function object to copy or move from
f - a callable to initialize the target with
Type requirements
-
F must meet the requirements of Callable.

[edit] Return value

*this

[edit] Exceptions

1-2,4-5) (none)