Function is_number_integer

third-party/nlohmann/include/nlohmann/json.hpp:1328–1331

@brief return whether value is an integer number @sa https://json.nlohmann.me/api/basic_json/is_number_integer/

    /// @brief return whether value is an integer number
    /// @sa https://json.nlohmann.me/api/basic_json/is_number_integer/
    constexpr bool is_number_integer() const noexcept
    {
        return m_type == value_t::number_integer || m_type == value_t::number_unsigned;
    }

    /// @brief return whether value is an unsigned integer number
    /// @sa https://json.nlohmann.me/api/basic_json/is_number_unsigned/