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| <H2>use_facet()</H2> |
| <P><B>Library:</B> <A HREF="2-6.html">Localization</A></P> |
| |
| <PRE><HR><B><I>Function</I></B><HR></PRE> |
| |
| <UL> |
| <LI><A HREF="#sec1">Local Index</A></LI> |
| <LI><A HREF="#sec2">Summary</A></LI> |
| <LI><A HREF="#sec3">Synopsis</A></LI> |
| <LI><A HREF="#sec4">Description</A></LI> |
| <LI><A HREF="#sec5">Example</A></LI> |
| <LI><A HREF="#sec6">See Also</A></LI> |
| <LI><A HREF="#sec7">Standards Conformance</A></LI> |
| </UL> |
| <A NAME="sec1"><H3>Local Index</H3></A> |
| No Entries |
| <A NAME="sec2"><H3>Summary</H3></A> |
| <P>A template function used to obtain a facet from a specific <B><I><A HREF="locale.html">locale</A></I></B> </P> |
| <A NAME="sec3"><H3>Synopsis</H3></A> |
| |
| <PRE>#include <locale> |
| |
| namespace std { |
| template<class Facet> const Facet& use_facet(const locale&); |
| } |
| </PRE> |
| <A NAME="sec4"><H3>Description</H3></A> |
| <P><SAMP>use_facet()</SAMP> returns a reference to the corresponding facet contained in the <SAMP>locale</SAMP> argument. You specify the facet type by explicitly including the template parameter (see the example below). If that facet is not present, then <SAMP>use_facet()</SAMP> throws <B><I><A HREF="bad-cast.html">bad_cast</A></I></B>. Otherwise, the reference remains valid for as long as any copy of the locale exists.</P> |
| <A NAME="sec5"><H3>Example</H3></A> |
| |
| <UL><PRE>// |
| // usefacet.cpp |
| // |
| |
| #include <iostream> |
| |
| int main () { |
| |
| std::locale loc; |
| |
| // Get a ctype facet |
| const std::ctype<char>& |
| ct = std::use_facet<std::ctype<char> >(loc); |
| |
| std::cout << 'a' << ct.toupper('c') << std::endl; |
| |
| return 0; |
| } |
| |
| |
| Program Output: |
| </PRE></UL> |
| <UL><PRE>aC |
| </PRE></UL> |
| <A NAME="sec6"><H3>See Also</H3></A> |
| <P><B><I><A HREF="locale.html">locale</A></I></B>, <A HREF="facets.html">Facets</A>, <SAMP><A HREF="has-facet.html">has_facet()</A></SAMP></P> |
| <A NAME="sec7"><H3>Standards Conformance</H3></A> |
| <P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 22.1.1</I></P> |
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