singleton_cpp11.hpp

#pragma once

template<typename T>
class Singleton
{
public:

    template<typename... Args>
    static
    T* GetInstance( Args... args )
    {
        if ( !_instance )
        {
            _instance = new T(std::forward<Args>(args)...);
        }
        return _instance;
    }
    
    static
    void DestroyInstance()
    {
        delete _instance;
        _instance = nullptr;
    }
    
private:
    static T* _instance;
};

template<typename T> T* Singleton<T>::_instance = nullptr;