dyn_singleton.h

#pragma once
 
namespace gaia {
  namespace core {
    template <typename T>
    class dyn_singleton final {
      T* m_obj = new T();
 
      dyn_singleton() = default;
 
    public:
      static T& get() noexcept {
        static dyn_singleton<T> singleton;
        return *singleton.m_obj;
      }
 
      dyn_singleton(dyn_singleton&& world) = delete;
      dyn_singleton(const dyn_singleton& world) = delete;
      dyn_singleton& operator=(dyn_singleton&&) = delete;
      dyn_singleton& operator=(const dyn_singleton&) = delete;
 
      ~dyn_singleton() {
        get().done();
      }
    };
  } // namespace core
} // namespace gaia