Method is_finished

cpp/src/arrow/util/future.h:349–352

\brief Whether the Future is finished A false return value is only indicative, as the Future can complete concurrently. A true return value is definitive, though.

  /// A false return value is only indicative, as the Future can complete
  /// concurrently.  A true return value is definitive, though.
  bool is_finished() const {
    CheckValid();
    return IsFutureFinished(impl_->state());
  }

  /// \brief Wait for the Future to complete and return its Result
  const Result<ValueType>& result() const& {