Function start_shared

test/exec/asio/test_completion_token.cpp:142–148

  template <typename Sender, typename Receiver>
  void
  start_shared(std::shared_ptr<connect_shared_operation_state<Sender, Receiver>>&& ptr) noexcept
  {
    REQUIRE(ptr);
    auto&& state = *ptr;
    state.start(std::move(ptr));
  }

  TEST_CASE("Asio-based asynchronous operation ends with error when canceled",
            "[asioexec][completion_token]")