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<A HREF="pointer-to-binary-function.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="pop-heap.html"><IMG SRC="images/bnext.gif" WIDTH=25 HEIGHT=21 ALT="Next file" BORDER=O></A><DIV CLASS="DOCUMENTNAME"><B>Apache C++ Standard Library Reference Guide</B></DIV>
<H2>pointer_to_unary_function</H2>
<P><B>Library:</B>&nbsp;&nbsp;<A HREF="2-4.html">General utilities</A></P>

<PRE><HR><B><I>pointer_to_unary_function</I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="unary-function.html">unary_function</A></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">Interface</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 function object class that adapts a pointer to a function, to take the place of a <B><I><A HREF="unary-function.html">unary_function</A></I></B></P>
<A NAME="sec3"><H3>Synopsis</H3></A>

<PRE>#include &lt;functional&gt;

namespace std {
  template &lt;class Arg, class Result&gt;
  class pointer_to_unary_function;
}
</PRE>
<A NAME="sec4"><H3>Description</H3></A>
<P>The <B><I>pointer_to_unary_function</I></B> class encapsulates a pointer to a single-argument function. The class uses <SAMP>operator()</SAMP> so that the resulting object serves as a function object for that function.</P>
<P>The <SAMP><A HREF="ptr-fun.html">ptr_fun</A></SAMP> function is overloaded to create instances of <B><I>pointer_to_unary_function</I></B> when included with the appropriate pointer to a function. </P>
<A NAME="sec5"><H3>Interface</H3></A>

<UL><PRE>namespace std {

  template &lt;class Arg, class Result&gt;
  class pointer_to_unary_function : public 
        unary_function&lt;Arg, Result&gt; {

    public:
    explicit pointer_to_unary_function (Result (*f)(Arg));
    Result operator() (const Arg&amp;) const;
  };
}
</PRE></UL>
<A NAME="sec6"><H3>See Also</H3></A>
<P><A HREF="functionobjects.html">Function Objects</A>, <B><I><A HREF="pointer-to-binary-function.html">pointer_to_binary_function</A></I></B>, <SAMP><A HREF="ptr-fun.html">ptr_fun()</A></SAMP>,  <B><I><A HREF="unary-function.html">unary_function</A></I></B></P>
<A NAME="sec7"><H3>Standards Conformance</H3></A>
<P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 20.3.7</I></P>

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