Function is_number_integer

3rd/nlohmann_json/include/nlohmann/json.hpp:2632–2635

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

    @since version 1.0.0
    */
    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