// This program demonstrates how to implement while-loop control flow
// using condition tasks.
#include <taskflow/taskflow.hpp>

int main() {

 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;
}