tf::Executor executor;

tf::Taskflow taskflow("simple");

auto A = taskflow.emplace([]() { std::cout << "TaskA\n"; });

auto B = taskflow.emplace([]() { std::cout << "TaskB\n"; });

auto C = taskflow.emplace([]() { std::cout << "TaskC\n"; });

auto D = taskflow.emplace([]() { std::cout << "TaskD\n"; });

A.precede(B); // B runs after A // +---+

A.precede(C); // C runs after A // +---->| B |-----+

B.precede(D); // D runs after B // | +---+ |

C.precede(D); // D runs after C // +---+ +-v-+

// | A | | D |

// +---+ +-^-+

executor.run(taskflow).wait(); // | +---+ |

// +---->| C |-----+

// +---+

return 0;