std::experimental::packaged_task::packaged_task(libraryfundamentalsTS)(3)

NAME
std::experimental::packaged_task::packaged_task(libraryfundamentalsTS) - std::experimental::packaged_task::packaged_task(libraryfundamentalsTS)

Synopsis
   packaged_task() noexcept; (1) (library fundamentals TS)
   template< class F > (2) (library fundamentals TS)
   explicit packaged_task( F&& f );
   template< class F, class Allocator >
   explicit packaged_task( std::allocator_arg_t, const (3) (library fundamentals TS)
   Allocator& alloc, F&& f );
   packaged_task( const packaged_task& ) = delete; (4) (library fundamentals TS)
   packaged_task( packaged_task&& rhs ) noexcept; (5) (library fundamentals TS)
   Constructs a new std::experimental::packaged_task object.
   1) Constructs a std::experimental::packaged_task object with no task and no shared
   state.
   2) Constructs a std::experimental::packaged_task object with a shared state and a
   copy of the task, initialized with std::forward<F>(f). This constructor does not
   participate in overload resolution if std::decay<F>::type is the same type as
   std::packaged_task<R(ArgTypes...)>.
   3) Constructs a std::experimental::packaged_task object with a shared state and a
   copy of the task, initialized with std::forward<F>(f). Uses the provided allocator
   to allocate memory necessary to store the task, which is treated as a type-erased
   allocator (see below). This constructor does not participate in overload resolution
   if std::decay<F>::type is the same type as std::packaged_task<R(ArgTypes...)>.
   4) The copy constructor is deleted, std::experimental::packaged_task is move-only.
   5) Constructs a std::experimental::packaged_task with the shared state and task
   formerly owned by rhs, leaving rhs with no shared state and a moved-from task.
   Type-erased allocator
   The constructors of packaged_task taking an allocator argument alloc treats that
   argument as a type-erased allocator. The memory resource pointer used by
   packaged_task to allocate memory is determined using the allocator argument (if
   specified) as follows: Type of alloc Value of the memory resource pointer Non-existent (no allocator specified at time The value of std::experimental::pmr::get_default_resource() of construction) at time of construction. std::nullptr_t The value of std::experimental::pmr::get_default_resource()
                        at time of construction. A pointer type convertible to static_cast<std::experimental::pmr::memory_resource*>(alloc) std::experimental::pmr::memory_resource* A specialization of alloc.resource() std::experimental::pmr::polymorphic_allocator
                        A pointer to a value of type Any other type meeting the Allocator std::experimental::pmr::resource_adaptor<A>(alloc), where A requirements is the type of alloc. The pointer remains valid only for the
                        lifetime of the packaged_task object. None of the above The program is ill-formed.

Parameters
   f - the callable target (function, member function, lambda-expression, functor)
           to execute
   alloc - the allocator to use when storing the task
   rhs - the std::experimental::packaged_task to move from

Exceptions
   2,3) Any exceptions thrown by copy/move constructor of f and possiblly
   std::bad_alloc if the allocation fails.
   4) (none)