std::experimental::shared_future<T>::operator=

std::experimental::shared_future<T>& operator=( const std::experimental::shared_future<T>& other );	(1)
std::experimental::shared_future<T>& operator=( std::experimental::shared_future<T>&& other ) noexcept;	(2)

赋值另一 std::experimental::shared_future 对象的内容。

1) 释放任何共享状态并赋值 other 的内容给 *this。赋值后，this->valid() == other.valid()。

2) 释放任何共享状态并移动赋值 other 的内容给 *this。赋值后，other.valid() == false 而 this->valid() 将生成与 other.valid() 在赋值前相同的值。

other - 赋值来源的 std::experimental::shared_future

*this

std::future 扩展
experimental::future
experimental::shared_future
experimental::when_all
experimental::when_any
experimental::make_ready_future
experimental::make_exceptional_future
闩和屏障
experimental::latch
experimental::barrier
experimental::flex_barrier
原子智能指针
experimental::atomic_shared_ptr
experimental::atomic_weak_ptr