// A simple example to capture the following task dependencies.
//
// TaskA---->TaskB---->TaskD
// TaskA---->TaskC---->TaskD

#include <taskflow/taskflow.hpp> // the only include you need

int main(){

 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;
}