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// The program demonstrate how to capture an exception thrown

// from a running taskflow

#include <taskflow/taskflow.hpp>

int main(){

tf::Executor executor;

tf::Taskflow taskflow("exception");

auto [A, B, C, D] = taskflow.emplace(

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

[]() {

std::cout << "TaskB\n";

throw std::runtime_error("Exception on Task B");

},

[]() {

std::cout << "TaskC\n";

throw std::runtime_error("Exception on Task C");

},

[]() { std::cout << "TaskD will not be printed due to exception\n"; }

);

A.precede(B, C); // A runs before B and C

D.succeed(B, C); // D runs after B and C

try {

executor.run(taskflow).get();

}

catch(const std::runtime_error& e) {

// catched either TaskB's or TaskC's exception

std::cout << e.what() << std::endl;

}

return 0;

}