std::cout << "Composition example 1\n";

tf::Executor executor;

// f1 has three independent tasks

tf::Taskflow f1;

auto [f1A, f1B, f1C] = f1.name("F1").emplace(

[&](){ std::cout << "F1 TaskA\n"; },

[&](){ std::cout << "F1 TaskB\n"; },

[&](){ std::cout << "F1 TaskC\n"; }

);

f1A.name("f1A");

f1B.name("f1B");

f1C.name("f1C");

f1A.precede(f1C);

f1B.precede(f1C);

// f2A ---

// |----> f2C ----> f1_module_task ----> f2D

// f2B ---

tf::Taskflow f2;

auto [f2A, f2B, f2C, f2D] = f2.name("F2").emplace(

[&](){ std::cout << " F2 TaskA\n"; },

[&](){ std::cout << " F2 TaskB\n"; },

[&](){ std::cout << " F2 TaskC\n"; },

[&](){ std::cout << " F2 TaskD\n"; }

);

f2A.name("f2A");

f2B.name("f2B");

f2C.name("f2C");

f2D.name("f2D");

f2A.precede(f2C);

f2B.precede(f2C);

auto f1_module_task = f2.composed_of(f1).name("module");

f2C.precede(f1_module_task);

f1_module_task.precede(f2D);

f2.dump(std::cout);

executor.run_n(f2, 3).get();

std::cout << "Composition example 2\n";

tf::Executor executor;

// f1 has two independent tasks

tf::Taskflow f1;

auto [f1A, f1B] = f1.name("F1").emplace(

[&](){ std::cout << "F1 TaskA\n"; },

[&](){ std::cout << "F1 TaskB\n"; }

);

f1A.name("f1A");

f1B.name("f1B");

// f2A ---

// |----> f2C

// f2B ---

//

// f1_module_task

tf::Taskflow f2;

auto [f2A, f2B, f2C] = f2.name("F2").emplace(

[&](){ std::cout << " F2 TaskA\n"; },

[&](){ std::cout << " F2 TaskB\n"; },

[&](){ std::cout << " F2 TaskC\n"; }

);

f2A.name("f2A");

f2B.name("f2B");

f2C.name("f2C");

f2A.precede(f2C);

f2B.precede(f2C);

f2.composed_of(f1);

// f3 has a module task (f2) and a regular task

tf::Taskflow f3;

f3.name("F3");

f3.composed_of(f2);

f3.emplace([](){ std::cout << " F3 TaskA\n"; }).name("f3A");

// f4: f3_module_task -> f2_module_task

tf::Taskflow f4;

f4.name("F4");

auto f3_module_task = f4.composed_of(f3);

auto f2_module_task = f4.composed_of(f2);

f3_module_task.precede(f2_module_task);

f4.dump(std::cout);

executor.run_until(f4, [iter = 1] () mutable { std::cout << '\n'; return iter-- == 0; }, [](){

std::cout << "First run_until finished\n";

}).get();

executor.run_until(f4, [iter = 2] () mutable { std::cout << '\n'; return iter-- == 0; }, [](){

std::cout << "Second run_until finished\n";

});

executor.run_until(f4, [iter = 3] () mutable { std::cout << '\n'; return iter-- == 0; }, [](){

std::cout << "Third run_until finished\n";

}).get();

composition_example_1();

composition_example_2();

return 0;