# std::packaged_task::get_future

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< cpp‎ | thread‎ | packaged task

std::future<R> get_future(); |  | (since C++11)

Returns a `future` which shares the same shared state as *this.

`get_future` can be called only once for each `packaged_task`.

### Parameters

(none)

### Return value

A future which shares the same shared state as *this.

### Exceptions

std::future_error on the following error conditions:

- The shared state has already been retrieved via a call to `get_future`. The error category is set to `future_already_retrieved`.
- *this has no shared state. The error category is set to `no_state`.

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