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| <TITLE>An Inserter for Phone Numbers</TITLE> |
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| <H2>26.4 An Inserter for Phone Numbers</H2> |
| <A NAME="idx592"><!></A> |
| <P>Now let's take a look at the implementation of the inserter for our phone number class:</P> |
| |
| <UL><PRE> |
| std::ostream& operator<< (std::ostream& os, const PhoneNumber& pn){ |
| std::locale loc = os.getloc (); // 1 |
| const phone_put& ppFacet |
| = std::use_facet<phone_put> (loc); // 2 |
| os << ppFacet.put(pn._cntryName, |
| pn._areaCode, pn._extension); // 3 |
| return (os); |
| } |
| </PRE></UL> |
| <TABLE CELLPADDING="3"> |
| |
| <TR VALIGN="top"><TD><SAMP>//1</SAMP></TD><TD>The inserter function uses the output stream's locale object (obtained via <SAMP>getloc()</SAMP>), |
| <TR VALIGN="top"><TD><SAMP>//2</SAMP></TD><TD>uses the locale's phone number facet object, |
| <TR VALIGN="top"><TD><SAMP>//3</SAMP></TD><TD>and calls the facet object's formatting service <SAMP>put()</SAMP>. |
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