Function get_ref_impl

src/include/nlohmann/json.hpp:1550–1561

    */
    template<typename ReferenceType, typename ThisType>
    static ReferenceType get_ref_impl(ThisType& obj)
    {
        // delegate the call to get_ptr<>()
        auto* ptr = obj.template get_ptr<typename std::add_pointer<ReferenceType>::type>();

        if (JSON_HEDLEY_LIKELY(ptr != nullptr))
        {
            return *ptr;
        }

        JSON_THROW(type_error::create(303, detail::concat("incompatible ReferenceType for get_ref, actual type is ", obj.type_name()), &obj));
    }

  public:
    /// @name value access