2D的Wavefront如下图所示：

#include <taskflow/taskflow.hpp>std::mutex cout_mutex;
void format_str(std::string const& str) {std::lock_guard<std::mutex> lock(cout_mutex); std::cout << str << std::endl;
}std::string createTaskName(int i, int j) {return "Task" + std::to_string(i) + "_" + std::to_string(j);
}
int main() {tf::Executor executor;tf::Taskflow taskflow;int num_blocks = 3; // 3*3的 Wavefront std::vector<std::vector<tf::Task>>  Tasks(num_blocks); // 存放每个task对象for(int i = 0; i < num_blocks; i++) {for(int j = 0; j < num_blocks; j++) {const std::string task_name = createTaskName(i,j);// 创建task[i][j]Tasks[i].emplace_back(taskflow.emplace([task_name](){format_str(task_name);}).name(task_name));// 构建依赖关系if(i > 0) {Tasks[i][j].succeed(Tasks[i-1][j]);}if(j > 0) {Tasks[i][j].succeed(Tasks[i][j-1]);}}}executor.run(taskflow).wait();taskflow.dump(std::cout);
}