Function is_number_unsigned

native/thirdpart/json/json.hpp:16800–16803

! @brief return whether value is an unsigned integer number This function returns true if and only if the JSON value is an unsigned integer number. This excludes floating-point and signed integer values. @return `true` if type is an unsigned integer number, `false` otherwise. @complexity Constant. @exceptionsafety No-throw guarantee: this member function never throws

    @since version 2.0.0
    */
    constexpr bool is_number_unsigned() const noexcept
    {
        return m_type == value_t::number_unsigned;
    }

    /*!
    @brief return whether value is a floating-point number