// ### Qt 5: We need to return QString from these function since
    //           unicode data contains several characters for these fields.
    QChar decimalPoint() const;
    QChar groupSeparator() const;
    QChar percent() const;
    QChar zeroDigit() const;
    QChar negativeSign() const;
    QChar positiveSign() const;
    QChar exponential() const;
...
private:
    friend struct QLocalePrivate;
    // ### We now use this field to pack an index into locale_data and NumberOptions.
    // ### Qt 5: change to a QLocaleData *d; uint numberOptions.
    union {
        void *v;
        Data p;
    };