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std::experimental::function::operator=(3) | C++ Standard Libary | std::experimental::function::operator=(3) |
NAME¶
std::experimental::function::operator= - std::experimental::function::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¶
-
F must meet the requirements of Callable.
Return value¶
*this
Exceptions¶
1-2,4-5) (none)
2022.07.31 | http://cppreference.com |