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/**
* @file keyed.hpp
* @author Felix Morgner (felix.morgner@gmail.com)
* @since 1.0.0
*/
#ifndef WANDA_META_KEYED_HPP
#define WANDA_META_KEYED_HPP
namespace wanda::meta
{
/**
* @brief A tag type to prevent construction of a type without a factory
*/
template<typename Derived>
struct keyed
{
protected:
struct key
{
};
explicit keyed(key) {}
};
} // namespace wanda::meta
#endif
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