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Class promise<T> (2.17.0)

Implement ISO/IEC TS 19571:2016 promise<T>.

Constructors

Creates a promise with an unsatisfied shared state.

Creates a promise with an unsatisfied shared state.

Parameter
Name	Description
`cancellation_callback`	`std::function< void()>`

Creates a promise without a shared state.

Parameter
Name	Description
`x`	`null_promise_t`

Constructs a new promise and transfer any shared state from rhs.

Parameter
Name	Description
	`promise &&`

Parameter
Name	Description
	`promise const &`

Abandons the shared state in *this, if any, and transfers the shared state from rhs.

Parameter
Name	Description
`rhs`	`promise &&`

Returns
Type	Description
`promise &`

Parameter
Name	Description
	`promise const &`

Returns
Type	Description
`promise &`

Swaps the shared state in *this with rhs.

Parameter
Name	Description
`other`	`promise &`

Returns
Type	Description
`void`

Creates the future<T> using the same shared state as *this.

Returns
Type	Description
`future< T >`

Satisfies the shared state.

Parameter
Name	Description
`value`	`T`

Exceptions
Type	Description
`std::future_error`	with std::future_errc::promise_already_satisfied if the shared state is already satisfied.
`std::future_error`	with std::no_state if the promise does not have a shared state.

Returns
Type	Description
`void`