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this_coro::throw_if_cancelled (1 of 2 overloads)

Returns an awaitable object that may be used to determine whether the coroutine throws if trying to suspend when it has been cancelled.

constexpr unspecified throw_if_cancelled();
boost::asio::awaitable<void> my_coroutine()
  if (co_await boost::asio::this_coro::throw_if_cancelled)
    // ...

  // ...