NAME

std::promise::operator= - std::promise::operator=

Synopsis

promise& operator=( promise&& other ) noexcept; (1) (since C++11)
promise& operator=( const promise& rhs ) = delete; (2) (since C++11)

Assigns the contents.

1) Move assignment operator. First, abandons the shared state (as in ~promise()),
then assigns the shared state of other as if by executing
std::promise(std::move(other)).swap(*this).
2) promise is not copy-assignable.

Parameters

other - another promise to acquire the state from

Return value

*this