Method setVal

io/HeaderVal.hpp:164–171

    }

    bool setVal(std::string val)
    {
        m_valSet = true;
        m_val = val;
        if (LEN > 0)
            m_val.resize(LEN);
        return (LEN == 0 || val.length() <= LEN);
    }

    std::string val() const
        { return m_valSet ? m_val : m_defVal; }