Helper class to use "RAII" with nonpointer objects

on_destroy.hpp

#ifndef ON_DESTROY_H
#define ON_DESTROY_H

#include <functional>
#include <utility>

class on_destroy {
public: 
    on_destroy() { }
    template<class F, class... Args>
    on_destroy(F&& f, Args&&... args)
    : function(std::bind(std::forward<F>(f), std::forward<Args>(args)...))
    {
    }
    on_destroy& operator=(on_destroy &&that)
    {
        function = std::move(that.function);
        return *this;
    }
    ~on_destroy()
    {
        if(function)
            function();
    }
private:
    std::function<void()> function;
};

#endif