// Task.h
class Task
{
public:
    Task() = default;
    Task(const Task &) = delete;
    ~Task() = default;
    Task(Task &&) = default;
    const Task & operator= (const Task &) = default;
};


/main.cpp
#include <iostream>
#include "Task.h"

int main()
{
    Task t;
    std::cout<<"hello world"<<std::endl;
    return 0;
}