File: not_equal_to.html

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<HTML>
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<Head>
<Title>not_equal_to&lt;T&gt;</Title>
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</HEAD>
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" 
	ALINK="#ff0000"> 
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<H1>not_equal_to&lt;T&gt;</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 VAlign=top><b>Category</b>: functors</TD>
<TD Align=right VAlign=top><b>Component type</b>: type</TD>
</TR>
</Table>

<h3>Description</h3>
<tt>Not_equal_to&lt;T&gt;</tt> is a <A href="functors.html">function object</A>.  Specifically, it is an 
<A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>, which means it is a function 
object that tests the truth or falsehood of some condition.
If <tt>f</tt> is an object of class
<tt>not_equal_to&lt;T&gt;</tt> and <tt>x</tt> and <tt>y</tt> are objects of class <tt>T</tt>, then
<tt>f(x,y)</tt> returns <tt>true</tt> if <tt>x != y</tt> and <tt>false</tt> otherwise.
<h3>Example</h3>
Finds the first nonzero element in a list.
<pre>
<A href="List.html">list</A>&lt;int&gt; L;
...
<A href="List.html">list</A>&lt;int&gt;::iterator first_nonzero = 
       <A href="find_if.html">find_if</A>(L.begin(), L.end(), <A href="binder2nd.html">bind2nd</A>(not_equal_to&lt;int&gt;(), 0));
assert(first_nonzero == L.end() || *first_nonzero != 0);
</pre>
<h3>Definition</h3>
Defined in the standard header <A href="functional">functional</A>, and in the nonstandard
backward-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>T</tt>
</TD>
<TD VAlign=top>
The type of <tt>not_equal_to</tt>'s arguments.
</TD>
<TD VAlign=top>
&nbsp;
</TD>
</tr>
</table>
<h3>Model of</h3>
<A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>, <A href="DefaultConstructible.html">DefaultConstructible</A>
<h3>Type requirements</h3>
<tt>T</tt> is <A href="EqualityComparable.html">EqualityComparable</A>.
<h3>Public base classes</h3>
<tt><A href="binary_function.html">binary_function</A>&lt;T, T, bool&gt;</tt>.
<h3>Members</h3>
<Table border>
<TR>
<TH>
Member
</TH>
<TH>
Where defined
</TH>
<TH>
Description
</TH>
</TR>
<TR>
<TD VAlign=top>
<tt>first_argument_type</tt>
</TD>
<TD VAlign=top>
 <A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>
</TD>
<TD VAlign=top>
The type of the first argument: <tt>T</tt>
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>second_argument_type</tt>
</TD>
<TD VAlign=top>
 <A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>
</TD>
<TD VAlign=top>
The type of the second argument: <tt>T</tt>
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>result_type</tt>
</TD>
<TD VAlign=top>
 <A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>
</TD>
<TD VAlign=top>
The type of the result: <tt>bool</tt>
</TD>
</TR>
<TR>
<TD VAlign=top>
<b><tt>not_equal_to</b>()</tt>
</TD>
<TD VAlign=top>
 <A href="DefaultConstructible.html">DefaultConstructible</A>
</TD>
<TD VAlign=top>
The default constructor.
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>bool <b>operator</b>()(const T&amp; x, const T&amp; y)</tt>
</TD>
<TD VAlign=top>
 <A href="BinaryFunction.html">Binary Function</A>
</TD>
<TD VAlign=top>
Function call operator.  The return value is <tt>x != y</tt>.
</TD>
</tr>
</table>
<h3>New members</h3>
All of <tt>not_equal_to</tt>'s members are defined in the 
<A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A> and  <A href="DefaultConstructible.html">DefaultConstructible</A>
requirements.
<tt>Not_equal_to</tt> does not introduce any new members.
<h3>Notes</h3>
<h3>See also</h3>
The <A href="functors.html">function object overview</A>,  
<A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>, 
<tt><A href="equal_to.html">equal_to</A></tt>,
<tt><A href="greater.html">greater</A></tt>,
<tt><A href="less.html">less</A></tt>,
<tt><A href="greater_equal.html">greater_equal</A></tt>,
<tt><A href="less_equal.html">less_equal</A></tt>

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