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It is provided "as is" without express or implied warranty. -- --><Head><Title>unary_negate<AdaptablePredicate></Title><!-- Generated by htmldoc --></HEAD><BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" ALINK="#ff0000"> <IMG SRC="CorpID.gif" ALT="SGI" HEIGHT="43" WIDTH="151"> <!--end header--><BR Clear><H1>unary_negate<AdaptablePredicate></H1><Table CellPadding=0 CellSpacing=0 width=100%><TR><TD Align=left><Img src = "functors.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD><TD Align=right><Img src = "type.gif" Alt="" WIDTH = "194" HEIGHT = "39" ></TD></TR><TR><TD Align=left><Img src = "adaptors.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD><TD Align=right></TD></TR><TR><TD Align=left VAlign=top><b>Categories</b>: functors, adaptors</TD><TD Align=right VAlign=top><b>Component type</b>: type</TD></TR></Table><h3>Description</h3><tt>Unary_negate</tt> is a <A href="functors.html">function object</A> adaptor: it is an<A href="AdaptablePredicate.html">Adaptable Predicate</A> that represents the logical negationof some other <A href="AdaptablePredicate.html">Adaptable Predicate</A>. That is: if <tt>f</tt> is anobject of class <tt>unary_negate<AdaptablePredicate></tt>, thenthere exists an object <tt>pred</tt> of class <tt>AdaptablePredicate</tt>such that <tt>f(x)</tt> always returns the same value as <tt>!pred(x)</tt>. <A href="#1">[1]</A>There is rarely any reason to construct a <tt>unary_negate</tt>directly; it is almost always easier to use the helper function <tt>not1</tt>.<h3>Example</h3>Finds the first element in a list that does not lie in the rangefrom 1 to 10.<pre><A href="List.html">list</A><int> L;...<A href="List.html">list</A><int>::iterator in_range = <A href="find_if.html">find_if</A>(L.begin(), L.end(), <A href="unary_negate.html">not1</A>(<A href="binary_compose.html">compose2</A>(logical_and<bool>(), <A href="binder2nd.html">bind2nd</A>(<A href="greater_equal.html">greater_equal</A><int>(), 1), <A href="binder2nd.html">bind2nd</A>(<A href="less_equal.html">less_equal</A><int>(), 10))));assert(in_range == L.end() || !(*in_range >= 1 && *in_range <= 10));</pre><h3>Definition</h3>Defined in the standard header <A href="functional">functional</A>, and in the nonstandardbackward-compatibility header <A href="function.h">function.h</A>.<h3>Template parameters</h3><Table border><TR><TH>Parameter</TH><TH>Description</TH><TH>Default</TH></TR><TR><TD VAlign=top><tt>AdaptablePredicate</tt></TD><TD VAlign=top>The type of the function object that this <tt>unary_negate</tt> is the logical negation of.</TD><TD VAlign=top> </TD></tr></table><h3>Model of</h3><A href="AdaptablePredicate.html">Adaptable Predicate</A><h3>Type requirements</h3><tt>AdaptablePredicate</tt> must be a model of <A href="AdaptablePredicate.html">Adaptable Predicate</A>.<h3>Public base classes</h3><tt><A href="unary_function.html">unary_function</A><<A href="AdaptablePredicate.html">AdaptablePredicate</A>::argument_type, bool></tt><h3>Members</h3><Table border><TR><TH>Member</TH><TH>Where defined</TH><TH>Description</TH></TR><TR><TD VAlign=top><tt>argument_type</tt></TD><TD VAlign=top> <A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A></TD><TD VAlign=top>The type of the argument: <tt><A href="AdaptablePredicate.html">AdaptablePredicate</A>::argument_type</tt></TD></TR><TR><TD VAlign=top><tt>result_type</tt></TD><TD VAlign=top> <A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A></TD><TD VAlign=top>The type of the result: <tt>bool</tt></TD></TR><TR><TD VAlign=top><tt>bool operator()(argument_type)</tt></TD><TD VAlign=top> <A href="UnaryFunction.html">Unary Function</A></TD><TD VAlign=top>Function call operator.</TD></TR><TR><TD VAlign=top><pre>unary_negate(const AdaptablePredicate& pred)</pre></TD><TD VAlign=top><tt>unary_negate</tt></TD><TD VAlign=top>See below.</TD></TR><TR><TD VAlign=top><pre>template <class <A href="AdaptablePredicate.html">AdaptablePredicate</A>>unary_negate<AdaptablePredicate>not1(const AdaptablePredicate& pred);</pre></TD><TD VAlign=top><tt>unary_negate</tt></TD><TD VAlign=top>See below.</TD></tr></table><h3>New members</h3>These members are not defined in the <A href="AdaptablePredicate.html">Adaptable Predicate</A>requirements, but are specific to <tt>unary_negate</tt>.<Table border><TR><TH>Member</TH><TH>Description</TH></TR><TR><TD VAlign=top><pre>unary_negate(const AdaptablePredicate& pred)</pre></TD><TD VAlign=top>The constructor. Creates a <tt>unary_negate<AdaptablePredicate></tt>whose underlying predicate is <tt>pred</tt>. </TD></TR><TR><TD VAlign=top><pre>template <class <A href="AdaptablePredicate.html">AdaptablePredicate</A>>unary_negate<AdaptablePredicate>not1(const AdaptablePredicate& pred);</pre></TD><TD VAlign=top>If <tt>p</tt> is of type <tt>AdaptablePredicate</tt> then<tt>not1(p)</tt> is equivalent to <tt>unary_negate<AdaptablePredicate>(p)</tt>,but more convenient. This is a global function, not a memberfunction.</TD></tr></table><h3>Notes</h3><P><A name="1">[1]</A>Strictly speaking, <tt>unary_negate</tt> is redundant. It can beconstructed using the function object <tt><A href="logical_not.html">logical_not</A></tt> and theadaptor <tt><A href="unary_compose.html">unary_compose</A></tt>.<h3>See also</h3>The <A href="functors.html">function object overview</A>, <A href="AdaptablePredicate.html">Adaptable Predicate</A>, <A href="Predicate.html">Predicate</A>, <tt><A href="binary_negate.html">binary_negate</A></tt>, <tt><A href="unary_compose.html">unary_compose</A></tt>, <tt><A href="binary_compose.html">binary_compose</A></tt><!--start footer--> <HR SIZE="6"><A href="http://www.sgi.com/"><IMG SRC="surf.gif" HEIGHT="54" WIDTH="54" ALT="[Silicon Surf]"></A><A HREF="index.html"><IMG SRC="stl_home.gif" HEIGHT="54" WIDTH="54" ALT="[STL Home]"></A><BR><FONT SIZE="-2"><A href="http://www.sgi.com/Misc/sgi_info.html" TARGET="_top">Copyright © 1999 Silicon Graphics, Inc.</A> All Rights Reserved.</FONT><FONT SIZE="-3"><a href="http://www.sgi.com/Misc/external.list.html" TARGET="_top">TrademarkInformation</A></FONT><P></BODY></HTML> ⌨️ 快捷键说明
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