monostate.hpp

#ifndef ENTT_CORE_MONOSTATE_HPP
#define ENTT_CORE_MONOSTATE_HPP
 
#include "../config/config.h"
#include "fwd.hpp"
 
namespace entt {
 
template<id_type>
struct monostate {
    template<typename Type>
    void operator=(Type val) const noexcept {
        value<Type> = val;
    }
 
    template<typename Type>
    operator Type() const noexcept {
        return value<Type>;
    }
 
private:
    template<typename Type>
    inline static ENTT_MAYBE_ATOMIC(Type) value{};
};
 
template<id_type Value>
inline monostate<Value> monostate_v = {};
 
} // namespace entt
 
#endif