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| <H2>unary_negate</H2> |
| <P><B>Library:</B> <A HREF="2-4.html">General utilities</A></P> |
| |
| <PRE><HR><B><I>unary_negate</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">Constructors</A></LI> |
| <LI><A HREF="#sec7">Operators</A></LI> |
| <LI><A HREF="#sec8">See Also</A></LI> |
| <LI><A HREF="#sec9">Standards Conformance</A></LI> |
| </UL> |
| <A NAME="sec1"><H3>Local Index</H3></A> |
| <H4>Members</H4> |
| <UL><TABLE CELLPADDING=3> |
| <TR><TD VALIGN=top> |
| <A HREF="#idx1253">operator()()</A><BR> |
| </TD> |
| <TD VALIGN=top><A HREF="#idx1252">unary_negate()</A><BR> |
| </TD> |
| <TD VALIGN=top></TD></TR> |
| </TABLE></UL> |
| |
| <A NAME="sec2"><H3>Summary</H3></A> |
| <P>A function object that returns the complement of the result of its unary predicate </P> |
| <A NAME="sec3"><H3>Synopsis</H3></A> |
| |
| <PRE>#include <functional> |
| |
| namespace std { |
| template <class Predicate> |
| class unary_negate; |
| } |
| </PRE> |
| <A NAME="sec4"><H3>Description</H3></A> |
| <P><B><I>unary_negate</I></B> is a function object used as a return type for the function adapter <SAMP><A HREF="not1.html">not1()</A></SAMP>. <SAMP>not1()</SAMP> is a function adapter, known as a negator, that takes a unary predicate function object as its argument and returns a unary predicate function object that is the complement of the original. </P> |
| <P>Note that <SAMP><A HREF="not1.html">not1()</A></SAMP> works only with function objects that are defined as subclasses of the class <B><I><A HREF="unary-function.html">unary_function</A></I></B>.</P> |
| <A NAME="sec5"><H3>Interface</H3></A> |
| |
| <UL><PRE>namespace std { |
| |
| template <class Predicate> |
| class unary_negate : public |
| unary_function<typename Predicate::argument_type, bool> { |
| |
| public: |
| explicit unary_negate(const Predicate&); |
| bool operator()(const typename |
| Predicate::argument_type&) const; |
| }; |
| } |
| </PRE></UL> |
| <A NAME="sec6"><H3>Constructors</H3></A> |
| |
| <A NAME="idx1252"></A><PRE>explicit |
| <B>unary_negate</B>(const Predicate& pred);</PRE> |
| <UL> |
| <P>Constructs a <B><I>unary_negate</I></B> object from predicate <SAMP>pred</SAMP>.</P> |
| </UL> |
| |
| <A NAME="sec7"><H3>Operators</H3></A> |
| |
| <A NAME="idx1253"></A><PRE>bool |
| <B>operator()</B>(const typename Predicate::argument_type& x) |
| const;</PRE> |
| <UL> |
| <P>Returns the result of <SAMP>unary_negate<predicate>(pred)</SAMP>.</P> |
| </UL> |
| |
| <A NAME="sec8"><H3>See Also</H3></A> |
| <P><SAMP><A HREF="not1.html">not1()</A></SAMP>, <SAMP><A HREF="not2.html">not2()</A></SAMP>, <B><I><A HREF="unary-function.html">unary_function</A></I></B>, <B><I><A HREF="binary-negate.html">binary_negate</A></I></B></P> |
| <A NAME="sec9"><H3>Standards Conformance</H3></A> |
| <P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, 20.3.5</I></P> |
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