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| <H2>26.8 Formatting Phone Numbers</H2> |
| <P>As mentioned earlier, the virtual function in the base class facet <SAMP>do_put()</SAMP> must be overridden in derived classes to actually implement locale dependent formatting of phone numbers. In the example below, we show <SAMP>do_put()</SAMP> (see <SAMP>//1</SAMP>) being overridden in the derived facet class US_phone_put to implement formatting phone numbers in the US style. This overridden version will be called by the base class's <SAMP>put() </SAMP>member function</P> |
| |
| <UL><PRE> |
| class US_phone_put: public phone_put { |
| ... |
| protected: |
| ... |
| // perform formatting in the US style |
| virtual string_type do_put(string_type cntryName, //1 |
| string_type areaCode, |
| string_type extension) const { |
| ... |
| } |
| }; |
| </PRE></UL> |
| <P>For the sake of brevity, we spare you here the details of the actual implementation of the formatting in <SAMP>do_put()</SAMP>.</P> |
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