singleton.h

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#ifndef CPPCOMMON_UTILITY_SINGLETON_H
#define CPPCOMMON_UTILITY_SINGLETON_H
 
namespace CppCommon {
 
 
template <typename T>
class Singleton
{
    friend T;
 
public:
    Singleton(const Singleton&) = delete;
    Singleton(Singleton&&) = delete;
 
    Singleton& operator=(const Singleton&) = delete;
    Singleton& operator=(Singleton &&) = delete;
 
 
    static T& GetInstance()
    {
        static T instance;
        return instance;
    }
 
private:
    Singleton() noexcept = default;
    ~Singleton() noexcept = default;
};
 
} // namespace CppCommon
 
#endif // CPPCOMMON_UTILITY_SINGLETON_H