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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="is_bind_expression.html" title="cpp/utility/functional/is bind expression"><span class="t-lines"><span>is_bind_expression</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="is_placeholder.html" title="cpp/utility/functional/is placeholder"><span class="t-lines"><span>is_placeholder</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="placeholders.html" title="cpp/utility/functional/placeholders"><span class="t-lines"><span>_1, _2, _3, ...</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Reference wrappers </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="reference_wrapper.html" title="cpp/utility/functional/reference wrapper"><span class="t-lines"><span>reference_wrapper</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ref.html" title="cpp/utility/functional/ref"><span class="t-lines"><span>ref</span><span>cref</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Operator wrappers </td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="plus.html" title="cpp/utility/functional/plus"><span class="t-lines"><span>plus</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="minus.html" title="cpp/utility/functional/minus"><span class="t-lines"><span>minus</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="negate.html" title="cpp/utility/functional/negate"><span class="t-lines"><span>negate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="multiplies.html" title="cpp/utility/functional/multiplies"><span class="t-lines"><span>multiplies</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="divides.html" title="cpp/utility/functional/divides"><span class="t-lines"><span>divides</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="modulus.html" title="cpp/utility/functional/modulus"><span class="t-lines"><span>modulus</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="logical_and.html" title="cpp/utility/functional/logical and"><span class="t-lines"><span>logical_and</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="logical_or.html" title="cpp/utility/functional/logical or"><span class="t-lines"><span>logical_or</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="logical_not.html" title="cpp/utility/functional/logical not"><span class="t-lines"><span>logical_not</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="equal_to.html" title="cpp/utility/functional/equal to"><span class="t-lines"><span>equal_to</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="not_equal_to.html" title="cpp/utility/functional/not equal to"><span class="t-lines"><span>not_equal_to</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="greater" title="cpp/utility/functional/greater"><span class="t-lines"><span>greater</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>less</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="greater_equal.html" title="cpp/utility/functional/greater equal"><span class="t-lines"><span>greater_equal</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="less_equal.html" title="cpp/utility/functional/less equal"><span class="t-lines"><span>less_equal</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bit_and.html" title="cpp/utility/functional/bit and"><span class="t-lines"><span>bit_and</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bit_or.html" title="cpp/utility/functional/bit or"><span class="t-lines"><span>bit_or</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bit_xor.html" title="cpp/utility/functional/bit xor"><span class="t-lines"><span>bit_xor</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bit_not.html" title="cpp/utility/functional/bit not"><span class="t-lines"><span>bit_not</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Negators </td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unary_negate.html" title="cpp/utility/functional/unary negate"><span class="t-lines"><span>unary_negate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="binary_negate.html" title="cpp/utility/functional/binary negate"><span class="t-lines"><span>binary_negate</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="not1.html" title="cpp/utility/functional/not1"><span class="t-lines"><span>not1</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="not2.html" title="cpp/utility/functional/not2"><span class="t-lines"><span>not2</span></span></a></div></div></td></tr>
</table></div></td></tr>
<p><br />
</p>
<tr class="t-nv-h2"><td colspan="5"> Deprecated binders and adaptors </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unary_function.html" title="cpp/utility/functional/unary function"><span class="t-lines"><span>unary_function</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="binary_function.html" title="cpp/utility/functional/binary function"><span class="t-lines"><span>binary_function</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ptr_fun.html" title="cpp/utility/functional/ptr fun"><span class="t-lines"><span>ptr_fun</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="pointer_to_unary_function.html" title="cpp/utility/functional/pointer to unary function"><span class="t-lines"><span>pointer_to_unary_function</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="pointer_to_binary_function.html" title="cpp/utility/functional/pointer to binary function"><span class="t-lines"><span>pointer_to_binary_function</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="mem_fun.html" title="cpp/utility/functional/mem fun"><span class="t-lines"><span>mem_fun</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="mem_fun_t.html" title="cpp/utility/functional/mem fun t"><span class="t-lines"><span>mem_fun_t</span><span>mem_fun1_t</span><span>const_mem_fun_t</span><span>const_mem_fun1_t</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="mem_fun_ref.html" title="cpp/utility/functional/mem fun ref"><span class="t-lines"><span>mem_fun_ref</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="mem_fun_ref_t.html" title="cpp/utility/functional/mem fun ref t"><span class="t-lines"><span>mem_fun_ref_t</span><span>mem_fun1_ref_t</span><span>const_mem_fun_ref_t</span><span>const_mem_fun1_ref_t</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="binder12.html" title="cpp/utility/functional/binder12"><span class="t-lines"><span>binder1st</span><span>binder2nd</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bind12.html" title="cpp/utility/functional/bind12"><span class="t-lines"><span>bind1st</span><span>bind2nd</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/utility/functional/navbar_content&amp;action=edit">&#91;edit&#93;</a></span></div></div></div></div><div class="t-navbar-sep">&#160;</div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>Defined in header <code><a href="../../header/functional.html" title="cpp/header/functional">&lt;functional&gt;</a></code>
 </div></td>
<td></td>
<td></td>
<p></tbody>
</p>
<tbody class="t-dcl-rev"><tr class="t-dcl-sep t-dcl-rev-sep"><td></td><td></td><td></td></tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
<tr class="t-dcl t-until-cxx14">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> T <span class="sy1">&gt;</span><br />
<span class="kw1">struct</span> less<span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-until-cxx14">(until C++14)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
<tr class="t-dcl t-since-cxx14">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> T <span class="sy1">=</span> <span class="kw4">void</span> <span class="sy1">&gt;</span><br />
<span class="kw1">struct</span> less<span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-since-cxx14">(since C++14)</span> </td>
</tr>
</tbody><tbody>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Function object for performing comparisons. Unless specialized, invokes <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">&lt;</span></span></span> on type <code>T</code>.
</p>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Specializations"><span class="tocnumber">1</span> <span class="toctext">Specializations</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="#Member_types"><span class="tocnumber">2</span> <span class="toctext">Member types</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="#Member_functions"><span class="tocnumber">3</span> <span class="toctext">Member functions</span></a></li>
<li class="toclevel-1"><a href="#std::less::operator.28.29"><span class="tocnumber">4</span> <span class="toctext"><span>std::less::</span>operator()</span></a>
<ul>
<li class="toclevel-2"><a href="#Parameters"><span class="tocnumber">4.1</span> <span class="toctext">Parameters</span></a></li>
<li class="toclevel-2"><a href="#Return_value"><span class="tocnumber">4.2</span> <span class="toctext">Return value</span></a></li>
<li class="toclevel-2"><a href="#Exceptions"><span class="tocnumber">4.3</span> <span class="toctext">Exceptions</span></a></li>
<li class="toclevel-2"><a href="#Possible_implementation"><span class="tocnumber">4.4</span> <span class="toctext">Possible implementation</span></a></li>
<li class="toclevel-2 tocsection-8"><a href="#Example"><span class="tocnumber">4.5</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-2 tocsection-9"><a href="#See_also"><span class="tocnumber">4.6</span> <span class="toctext">See also</span></a></li>
</ul>
</li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/utility/functional/less&amp;action=edit&amp;section=1" title="Edit section: Specializations">edit</a>]</span> <span class="mw-headline" id="Specializations">Specializations</span></h3>
<p>If the built-in <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">&lt;</span></span></span> does not provide total order for pointers, a partial specialization of <code>std::less </code> for pointer types is provided, which guarantees total order.
</p>
 <table class="t-rev-begin">
<tr class="t-rev t-since-cxx14"><td>
<p>The standard library provides a specialization of <code>std::less</code> when <code>T</code> is not specified, which leaves the parameter types and return type to be deduced.
</p>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="less_void" title="cpp/utility/functional/less void"> <span class="t-lines"><span>less<span class="t-dsc-small">&lt;void&gt;</span></span></span></a></div></div>
</td>
<td>   function object implementing <span class="t-c"><span class="mw-geshi cpp source-cpp">x <span class="sy1">&lt;</span> y</span></span> deducing argument and return types <br /> <span class="t-mark">(class template specialization)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/utility/functional/dsc_less_void&amp;action=edit">&#91;edit&#93;</a></span>
</td></tr>
</table>
</td>
<td><span class="t-mark-rev t-since-cxx14">(since C++14)</span></td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/utility/functional/less&amp;action=edit&amp;section=2" title="Edit section: Member types">edit</a>]</span> <span class="mw-headline" id="Member_types">Member types</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc-hitem">
<td>  type
</td>
<td>  definition
</td></tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <code>result_type</code>
</td>
<td>  <code>bool</code>
</td></tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <code>first_argument_type</code>
</td>
<td>  <code>T</code>
</td></tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <code>second_argument_type</code>
</td>
<td>  <code>T</code>
</td></tr>

</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/utility/functional/less&amp;action=edit&amp;section=3" title="Edit section: Member functions">edit</a>]</span> <span class="mw-headline" id="Member_functions">Member functions</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>operator()</div></div>
</td>
<td>   checks if the first argument is <i>less</i> than the second <br /> <span class="t-mark">(public member function)</span>
</td></tr>

</table>
<div class="t-member">
<h1> <span class="mw-headline" id="std::less::operator.28.29"> <span style="font-size:0.7em; line-height:130%">std::less::</span>operator() </span></h1>
<table class="t-dcl-begin"><tbody>
</tbody>
<tbody class="t-dcl-rev"><tr class="t-dcl-sep t-dcl-rev-sep"><td></td><td></td><td></td></tr>
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<tr class="t-dcl t-until-cxx14">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="br0">&#40;</span><span class="br0">&#41;</span><span class="br0">&#40;</span> <span class="kw4">const</span> T<span class="sy3">&amp;</span> lhs, <span class="kw4">const</span> T<span class="sy3">&amp;</span> rhs <span class="br0">&#41;</span> <span class="kw4">const</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-until-cxx14">(until C++14)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
<tr class="t-dcl t-since-cxx14">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="br0">&#40;</span><span class="br0">&#41;</span><span class="br0">&#40;</span> <span class="kw4">const</span> T<span class="sy3">&amp;</span> lhs, <span class="kw4">const</span> T<span class="sy3">&amp;</span> rhs <span class="br0">&#41;</span> <span class="kw4">const</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad">  </td>
<td> <span class="t-mark-rev t-since-cxx14">(since C++14)</span> </td>
</tr>
</tbody><tbody>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Checks whether <code>lhs</code> is <i>less</i> than <code>rhs</code>.
</p>
<h3> <span class="mw-headline" id="Parameters">Parameters</span></h3>
<table class="t-par-begin">


<tr class="t-par">
<td>  lhs, rhs
</td>
<td> -
</td>
<td>  values to compare
</td></tr></table>
<h3> <span class="mw-headline" id="Return_value">Return value</span></h3>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> if <span class="t-c"><span class="mw-geshi cpp source-cpp">lhs <span class="sy1">&lt;</span> rhs</span></span>, <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> otherwise.
</p>
<h3> <span class="mw-headline" id="Exceptions">Exceptions</span></h3>
<p>(none)
</p>
<h3> <span class="mw-headline" id="Possible_implementation">Possible implementation</span></h3>
<table class="eq-fun-cpp-table">


<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="br0">&#40;</span><span class="br0">&#41;</span><span class="br0">&#40;</span><span class="kw4">const</span> T <span class="sy3">&amp;</span>lhs, <span class="kw4">const</span> T <span class="sy3">&amp;</span>rhs<span class="br0">&#41;</span> <span class="kw4">const</span> 
<span class="br0">&#123;</span>
    <span class="kw1">return</span> lhs <span class="sy1">&lt;</span> rhs<span class="sy4">;</span>
<span class="br0">&#125;</span></pre></div></div>
</td></tr></table>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/utility/functional/less&amp;action=edit&amp;section=8" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include &lt;functional&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
&#160;
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">typename</span> A, <span class="kw1">typename</span> B, <span class="kw1">typename</span> U <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">less</span><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;&gt;</span>
<span class="kw4">bool</span> f<span class="br0">&#40;</span>A a, B b, U u <span class="sy1">=</span> U<span class="br0">&#40;</span><span class="br0">&#41;</span><span class="br0">&#41;</span>
<span class="br0">&#123;</span>
    <span class="kw1">return</span> u<span class="br0">&#40;</span>a, b<span class="br0">&#41;</span><span class="sy4">;</span>
<span class="br0">&#125;</span>
&#160;
<span class="kw4">int</span> main<span class="br0">&#40;</span><span class="br0">&#41;</span> 
<span class="br0">&#123;</span>
    <a href="../../io/basic_ostream.html"><span class="kw1438">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="../../io/manip/boolalpha.html"><span class="kw1444">std::<span class="me2">boolalpha</span></span></a><span class="sy4">;</span>   
    <a href="../../io/basic_ostream.html"><span class="kw1438">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> f<span class="br0">&#40;</span><span class="nu0">5</span>, <span class="nu0">20</span><span class="br0">&#41;</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
    <a href="../../io/basic_ostream.html"><span class="kw1438">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> f<span class="br0">&#40;</span><span class="nu0">100</span>, <span class="nu0">10</span><span class="br0">&#41;</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">&#125;</span></pre></div></div>
<p>Output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">true
false</pre></div></div> 
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/utility/functional/less&amp;action=edit&amp;section=9" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">
</td></tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../memory/owner_less.html" title="cpp/memory/owner less"> <span class="t-lines"><span>owner_less</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   provides mixed-type owner-based ordering of shared and weak pointers  <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/memory/dsc_owner_less&amp;action=edit">&#91;edit&#93;</a></span>
</td></tr>
</table>

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Preprocessor generated node count: 10201/1000000
Post‐expand include size: 160002/2097152 bytes
Template argument size: 32404/2097152 bytes
Highest expansion depth: 23/40
Expensive parser function count: 0/100
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