tf::Executor executor;

tf::Taskflow taskflow;

int i;

auto [init, cond, body, back, done] = taskflow.emplace(

[&](){ std::cout << "i=0\n"; i=0; },

[&](){ std::cout << "while i<5\n"; return i < 5 ? 0 : 1; },

[&](){ std::cout << "i++=" << i++ << '\n'; },

[&](){ std::cout << "back\n"; return 0; },

[&](){ std::cout << "done\n"; }

);

init.name("init");

cond.name("while i<5");

body.name("i++");

back.name("back");

done.name("done");

init.precede(cond);

cond.precede(body, done);

body.precede(back);

back.precede(cond);

taskflow.dump(std::cout);

executor.run(taskflow).wait();

return 0;