Function main

examples/scope.cpp:49–113

};

auto main() -> int
{
  exec::static_thread_pool ctx{1};
  exec::async_scope        scope;

  scheduler auto sch = ctx.get_scheduler();  // 1

  sender auto begin = schedule(sch);  // 2

  sender auto printVoid = then(begin, []() noexcept { printf("void\n"); });  // 3

  sender auto printEmpty = then(
    starts_on(sch, scope.on_empty()),
    []() noexcept { // 4
      printf("scope is empty\n");
    });

  printf("\n"
         "spawn void\n"
         "==========\n");

  scope.spawn(printVoid);  // 5

  sync_wait(printEmpty);

  printf("\n"
         "spawn void and 42\n"
         "=================\n");

  sender auto fortyTwo = then(begin, []() noexcept { return 42; });  // 6

  scope.spawn(printVoid);  // 7

  sender auto fortyTwoFuture = scope.spawn_future(fortyTwo);  // 8

  sender auto printFortyTwo = then(
    std::move(fortyTwoFuture),
    [](int fortyTwo) noexcept { // 9
      printf("%d\n", fortyTwo);
    });

  sender auto allDone = then(when_all(printEmpty, std::move(printFortyTwo)),
                             [](auto&&...) noexcept { printf("\nall done\n"); });  // 10

  sync_wait(std::move(allDone));

  {
    sender auto nest = scope.nest(begin);
    (void) nest;
  }
  sync_wait(scope.on_empty());

  {
    sender auto nest = scope.nest(begin);
    auto        op   = connect(std::move(nest), noop_receiver{});
    (void) op;
  }
  sync_wait(scope.on_empty());