family.hpp

#ifndef ENTT_CORE_FAMILY_HPP
#define ENTT_CORE_FAMILY_HPP
 
#include "../config/config.h"
#include "fwd.hpp"
 
namespace entt {

template<typename...>
class family {
    static auto identifier() noexcept {
        static ENTT_MAYBE_ATOMIC(id_type) value{};
        return value++;
    }
 
public:
    using value_type = id_type;

    template<typename... Type>
    // at the time I'm writing, clang crashes during compilation if auto is used instead of family_type
    inline static const value_type value = identifier();
};
 
} // namespace entt
 
#endif