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std::promise::get_future

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

Returns a future object associated with the same shared state as *this.

Exception is thrown if *this has no shared state or get_future has already been called.

Parameters

(none)

Return value

A future referring to the shared state of *this

Exceptions

std::future_error on the following conditions:

  • *this has no shared state. The error category is set to no_state.
  • get_future() has already been called on a promise with the same shared state as *this. The error category is set to future_already_retrieved.