std::thread::operator= - std::thread::operator=
thread& operator=( thread&& other ) noexcept;
(since C++11)
If *this still has an associated running thread (i.e. joinable() == true),
calls
std::terminate(). Otherwise, assigns the state of other to *this and sets
other to a
default constructed state.
After this call, this->get_id() is equal to the value of other.get_id()
prior to the
call, and other no longer represents a thread of execution.
other - another thread object to assign to this thread object