identifiable.cc

#import <concepts>
#import <functional>

template<class _Tp>
concept hashable = requires {
    std::hash<_Tp>();
};

template <class T> requires std::equality_comparable<T> && std::copyable<T> && hashable<T>
class IdentifiableRef {
public:
    IdentifiableRef(const T value) : value(value) {};
    
    IdentifiableRef(const IdentifiableRef &other) {
        this->value == other.value;
    }
    
    IdentifiableRef& operator=(const IdentifiableRef &other) {
        this->value = other.value;
    }
    
    bool operator==(const IdentifiableRef& other) const {
        return this->value == other.value;
    }
    
    const T value;
};