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<tr class="t-nv-h2"><td colspan="5"> General </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="value_category.html" title="cpp/language/value category"> value categories</a> (lvalue, rvalue, xvalue)</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="eval_order.html" title="cpp/language/eval order"> order of evaluation</a> (sequence points)</td></tr>
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<tr class="t-nv"><td colspan="5"> <a href="user_literal.html" title="cpp/language/user literal">user-defined literal</a><span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Operators </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_assignment.html" title="cpp/language/operator assignment"> Assignment operators</a>:
<code>a=b</code>, <code>a+=b</code>, <code>a-=b</code>, <code>a*=b</code>, <code>a/=b</code>, <code>a%=b</code>, <code>a&=b</code>, <code>a|=b</code>, <code>a^=b</code>, <code>a<<=b</code>, <code>a>>=</code></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_incdec.html" title="cpp/language/operator incdec"> Increment and decrement</a>: <code>++a</code>, <code>--a</code>, <code>a++</code>, <code>a--</code></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_arithmetic.html" title="cpp/language/operator arithmetic"> Arithmetic operators</a>:
<code>+a</code>, <code>-a</code>, <code>a+b</code>, <code>a-b</code>, <code>a*b</code>, <code>a/b</code>, <code>a%b</code>, <code>~a</code>, <code>a&b</code>, <code>a|b</code>, <code>a^b</code>, <code>a<<b</code>, <code>a>>b</code> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_logical.html" title="cpp/language/operator logical"> Logical operators</a>: <code>a||b</code>, <code>a&&b</code>, <code>!a</code></td></tr>
<tr class="t-nv"><td colspan="5"> <strong class="selflink"> Comparison operators</strong>: <code>a==b</code>, <code>a!=b</code>, <code>a<b</code>, <code>a>b</code>, <code>a<=b</code>, <code>a>=b</code></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_member_access.html" title="cpp/language/operator member access"> Member access operators</a>: <code>a[b]</code>, <code>*a</code>, <code>&a</code>, <code>a->b</code>, <code>a.b</code>, <code>a->*b</code>, <code>a.*b</code></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_other.html" title="cpp/language/operator other"> Other operators</a>: <code>a(...)</code>, <code>a,b</code>, <code>a?b:c</code> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_alternative.html" title="cpp/language/operator alternative">Alternative representations of operators</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operator_precedence.html" title="cpp/language/operator precedence">Precedence and associativity</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="fold.html" title="cpp/language/fold">Fold expression</a><span class="t-mark-rev t-since-cxx17">(C++17)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="new.html" title="cpp/language/new">new-expression</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="delete.html" title="cpp/language/delete">delete-expression</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="throw.html" title="cpp/language/throw">throw-expression</a></td></tr>
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<tr class="t-nv"><td colspan="5"> <a href="sizeof....html" title="cpp/language/sizeof...">sizeof...</a><span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="typeid.html" title="cpp/language/typeid">typeid</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="noexcept.html" title="cpp/language/noexcept">noexcept</a><span class="t-mark-rev t-since-cxx11">(C++11)</span></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="operators.html" title="cpp/language/operators">Operator overloading</a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Conversions </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="implicit_cast.html" title="cpp/language/implicit cast">Implicit conversions</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="const_cast.html" title="cpp/language/const cast">const_cast</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="static_cast.html" title="cpp/language/static cast">static_cast</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="reinterpret_cast.html" title="cpp/language/reinterpret cast">reinterpret_cast</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="dynamic_cast.html" title="cpp/language/dynamic cast">dynamic_cast</a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="explicit_cast.html" title="cpp/language/explicit cast">Explicit conversions</a> <code>(T)a</code>, <code>T(a)</code></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="cast_operator.html" title="cpp/language/cast operator">User-defined conversion</a></td></tr>
</table></div>
</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/language/expressions/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>Compares the arguments.
</p>
<table class="wikitable" style="font-size:85%;">
<tr>
<th rowspan="2"> Operator name
</th>
<th rowspan="2"> Syntax
</th>
<th rowspan="2"> <a href="operators.html" title="cpp/language/operators">Over​load​able</a>
</th>
<th colspan="2"> Prototype examples (for <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> T</span></span>)
</th></tr>
<tr>
<th> As member function
</th>
<th> As free (namespace) function
</th></tr>
<tr>
<td> equal to
</td>
<td> <code>a == b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td> not equal to
</td>
<td> <code>a != b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td> less than
</td>
<td> <code>a < b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy1"><</span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy1"><</span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td> greater than
</td>
<td> <code>a > b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy1">></span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy1">></span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td> less than or equal to
</td>
<td> <code>a <= b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy1"><=</span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy1"><=</span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td> greater than or equal to
</td>
<td> <code>a >= b</code>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes">Yes
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> T<span class="sy4">::</span><span class="me2">operator</span> <span class="sy1">>=</span><span class="br0">(</span><span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></span>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator <span class="sy1">>=</span><span class="br0">(</span><span class="kw4">const</span> T <span class="sy3">&</span>a, <span class="kw4">const</span> T2 <span class="sy3">&</span>b<span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td colspan="5">
<dl><dd><b>Notes</b><br />
</dd></dl>
<ul><li> All built-in operators return <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span>, and most <a href="operators.html" title="cpp/language/operators">user-defined overloads</a> also return <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span> so that the user-defined operators can be used in the same manner as the built-ins. However, in a user-defined operator overload, any type can be used as return type (including <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span></span></span>).
</li><li> <code>T2</code> can be any type including <code>T</code>
</li></ul>
</td></tr></table>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="operator_comparison.html#Explanation"><span class="tocnumber">1</span> <span class="toctext">Explanation</span></a>
<ul>
<li class="toclevel-2 tocsection-2"><a href="operator_comparison.html#Arithmetic_comparison_operators"><span class="tocnumber">1.1</span> <span class="toctext">Arithmetic comparison operators</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-3"><a href="operator_comparison.html#Example"><span class="tocnumber">2</span> <span class="toctext">Example</span></a>
<ul>
<li class="toclevel-2 tocsection-4"><a href="operator_comparison.html#Pointer_comparison_operators"><span class="tocnumber">2.1</span> <span class="toctext">Pointer comparison operators</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-5"><a href="operator_comparison.html#Example_2"><span class="tocnumber">3</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1 tocsection-6"><a href="operator_comparison.html#Notes"><span class="tocnumber">4</span> <span class="toctext">Notes</span></a></li>
<li class="toclevel-1 tocsection-7"><a href="operator_comparison.html#Standard_library"><span class="tocnumber">5</span> <span class="toctext">Standard library</span></a></li>
<li class="toclevel-1 tocsection-8"><a href="operator_comparison.html#See_also"><span class="tocnumber">6</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=1" title="Edit section: Explanation">edit</a>]</span> <span class="mw-headline" id="Explanation">Explanation</span></h3>
<p>Returns the boolean result of comparison of the values of the arguments, which are not modified.
</p>
<h4><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=2" title="Edit section: Arithmetic comparison operators">edit</a>]</span> <span class="mw-headline" id="Arithmetic_comparison_operators">Arithmetic comparison operators</span></h4>
<p>For every pair of promoted arithmetic types <code>L</code> and <code>R</code>, including enumeration types, the following function signatures participate in overload resolution:
</p>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1"><</span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">></span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1"><=</span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">>=</span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>L, R<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>If the operands has arithmetic or enumeration type (scoped or unscoped), <i>usual arithmetic conversions</i> are performed following the rules for <a href="operator_arithmetic.html" title="cpp/language/operator arithmetic">arithmetic operators</a>. The values are compared after conversions:
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=3" 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 <iostream></span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <a href="../io/manip/boolalpha.html"><span class="kw1487">std::<span class="me2">boolalpha</span></span></a><span class="sy4">;</span>
<span class="kw4">int</span> n <span class="sy1">=</span> <span class="sy2">-</span><span class="nu0">1</span><span class="sy4">;</span>
 
<span class="kw4">int</span> n2 <span class="sy1">=</span> <span class="nu0">1</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">" -1 == 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1">==</span> n2<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span>
<span class="sy1"><<</span> <span class="st0">"Comparing two signed values:<span class="es1">\n</span>"</span>
<span class="sy1"><<</span> <span class="st0">" -1 < 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1"><</span> n2<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span>
<span class="sy1"><<</span> <span class="st0">" -1 > 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1">></span> n2<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
 
<span class="kw4">unsigned</span> <span class="kw4">int</span> u <span class="sy1">=</span> <span class="nu0">1</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Comparing signed and unsigned:<span class="es1">\n</span>"</span>
<span class="sy1"><<</span> <span class="st0">" -1 < 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1"><</span> u<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span>
<span class="sy1"><<</span> <span class="st0">" -1 > 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1">></span> u<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
 
<span class="kw4">unsigned</span> <span class="kw4">char</span> uc <span class="sy1">=</span> <span class="nu0">1</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Comparing signed and smaller unsigned:<span class="es1">\n</span>"</span>
<span class="sy1"><<</span> <span class="st0">" -1 < 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1"><</span> uc<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span>
<span class="sy1"><<</span> <span class="st0">" -1 > 1? "</span> <span class="sy1"><<</span> <span class="br0">(</span>n <span class="sy1">></span> uc<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">}</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">-1 == 1? false
Comparing two signed values:
-1 < 1? true
-1 > 1? false
Comparing signed and unsigned:
-1 < 1? false
-1 > 1? true
Comparing signed and smaller unsigned:
-1 < 1? true
-1 > 1? false</pre></div></div>
</div>
<h4><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=4" title="Edit section: Pointer comparison operators">edit</a>]</span> <span class="mw-headline" id="Pointer_comparison_operators">Pointer comparison operators</span></h4>
<p>For every type <code>P</code> which is either pointer to object or pointer to function <span class="t-rev-inl t-until-cxx14"><span>or <span class="t-lc">std::nullptr_t</span></span> <span><span class="t-mark-rev t-until-cxx14">(until C++14)</span></span></span>, the following function signatures participate in overload resolution:
</p>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1"><</span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">></span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1"><=</span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">>=</span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>P, P<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>For every type <code>MP</code> that is a pointer to member object or pointer to member function or <span class="t-lc">std::nullptr_t</span>, the following function signatures participate in overload resolution:
</p>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>MP, MP<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span>MP, MP<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Comparison operators can be used to compare two pointers (or pointers-to-members, for <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">==</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy3">!</span><span class="sy1">=</span></span></span> only), or a pointer <span class="t-rev-inl t-since-cxx14"><span>to member</span> <span><span class="t-mark-rev t-since-cxx14">(since C++14)</span></span></span> and a null pointer constant<span class="t-rev-inl t-until-cxx14"><span>, or two null pointer constants (but only as long as at least one of them is <span class="t-lc">std::nullptr_t</span>: comparison of NULL and NULL follows arithmetic comparison rules)</span> <span><span class="t-mark-rev t-until-cxx14">(until C++14)</span></span></span>.
</p><p>First, <a href="implicit_cast.html" title="cpp/language/implicit cast">Pointer conversions</a> (pointer to member conversions if the arguments are pointers to members)<span class="t-rev-inl t-since-cxx17"><span>, function pointer conversions,</span> <span><span class="t-mark-rev t-since-cxx17">(since C++17)</span></span></span> and <a href="implicit_cast.html" title="cpp/language/implicit cast">qualification conversions</a> are applied to both operands to obtain the <i>composite pointer type</i>, as follows
</p>
<div class="t-li1"><span class="t-li">1)</span> If both operands are null pointer constants, the composite pointer type is <span class="t-lc">std::nullptr_t</span></div>
<div class="t-li1"><span class="t-li">2)</span> If one operand is a null pointer constant, and the other is a pointer, the composite type is exactly the pointer type</div>
<div class="t-li1"><span class="t-li">3)</span> If one operand is pointer to <i>cv1</i> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span></span></span> and the other is a pointer to <i>cv2</i> <code>T</code> for some type <code>T</code>, the composite type is "pointer to <i>cv12</i> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span></span></span>", where <i>cv12</i> is the union of <i>cv1</i> and <i>cv2</i>
<table class="t-rev-begin">
<tr class="t-rev t-until-cxx14"><td>
<div class="t-li1"><span class="t-li">4)</span> If both operands are pointers to the same type, with different cv-qualification, the composite is pointer to the same type with cv-qualification that is a union of the cv-qualifications of the arguments.
</div></td>
<td><span class="t-mark-rev t-until-cxx14">(until C++14)</span></td></tr>
<tr class="t-rev t-since-cxx14"><td>
<div class="t-li1"><span class="t-li">4)</span> If the types of the operands are P1, a pointer to (possibly cv-qualified) T1, and P2, a pointer to (possibly cv-qualified) T2, and if T1 is the same as T2 or is a base class of T2, then the composite pointer type is the <i>cv-combined</i> type of P1 and P2. Otherwise, if T2 is a base class of T1, then the composite pointer type is the <i>cv-combined</i> type of P2 and P1.</div>
<div class="t-li1"><span class="t-li">5)</span> If the types of the operands are MP1, pointer to member of T1 of type (possibly cv-qualified) U1 and MP2, pointer to member of T2 of type (possibly cv-qualified) U2, and if T1 is the same as or derived from T2, then the composite pointer type is the <i>cv-combined</i> type of MP1 and MP2. Otherwise, if T2 is derived from T1, then the composite pointer type is the cv-combined type of MP2 and MP1.</div>
<div class="t-li1"><span class="t-li">6)</span> if the types of the operands P1 and P2 are multi-level mixed pointer and pointer to member types with the same number of levels that only differ by cv-qualifications at any of the levels, the composite pointer type is the cv-combined type of P1 and P2</div>
<p>In the definition above, <i>cv-combined</i> type of two pointer types P1 and P2 is a type P3 that has the same number of levels and type at every level as P1, except that cv-qualifications at every level are set as follows:
</p>
<div class="t-li1"><span class="t-li">a)</span> at every level other than top level, the union of the cv-qualifications of P1 and P2 at that level</div>
<div class="t-li1"><span class="t-li">b)</span> if the resulting cv-qualification at any level is different from P1's or P2's cv-qualification at the same level, then const is added to every level between the top level and this one.</div>
<p>For example, the composite pointer type of <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span><span class="sy2">*</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">int</span><span class="sy2">*</span></span></span> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">void</span><span class="sy2">*</span></span></span>. The composite pointer type of <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span><span class="sy2">**</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">int</span><span class="sy2">**</span></span></span> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">int</span><span class="sy2">*</span> <span class="kw4">const</span><span class="sy2">*</span></span></span>. Note that until C++14, <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span><span class="sy2">**</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">int</span><span class="sy2">**</span></span></span> could not be compared.
</p>
</td>
<td><span class="t-mark-rev t-since-cxx14">(since C++14)</span></td></tr>
<tr class="t-rev t-since-cxx17"><td>
<p>In addition to the above, the composite pointer type between pointer to function and pointer to noexcept function (as long as the function type is the same) is pointer to function.
</p>
</td>
<td><span class="t-mark-rev t-since-cxx17">(since C++17)</span></td></tr>
</table></div>
<p>Note that this implies that any pointer can be compared with <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span><span class="sy2">*</span></span></span>.
</p><p>The result of comparing two pointers to objects (after conversions) is defined as follows:
</p>
<div class="t-li1"><span class="t-li">1)</span> If two pointers point to different elements of the same array, or to subobjects within different elements of the same array, the pointer to the element with the higher subscript <i>compares greater</i>. In other words, they results of comparing the pointers is the same as the result of comparing the indexes of the elements they point to.</div>
<div class="t-li1"><span class="t-li">2)</span> If one pointer points to an element of an array, or to a subobject of the element of the array, and another pointer points one past the last element of the array, the latter pointer <i>compares greater</i>. <span class="t-rev-inl t-since-cxx17"><span>Pointers to single objects are treated as pointers to arrays of one: <code>&obj+1</code> compares greater than <code>&obj</code></span> <span><span class="t-mark-rev t-since-cxx17">(since C++17)</span></span></span></div>
<div class="t-li1"><span class="t-li">3)</span> If, within an object of non-union class type, two pointers point to different non-static data members with the same <a href="access.html" title="cpp/language/access">member access</a>, or to subobjects or array elements of such members, recursively, the pointer to the later declared member <i>compares greater</i>. In other words, class members in each of the three member access modes are positioned in memory in order of declaration.</div>
<p>The result of equality comparison of two pointers (after conversions) is defined as follows:
</p>
<div class="t-li1"><span class="t-li">1)</span> If the pointers are both null pointer values, they <i>compare equal</i></div>
<div class="t-li1"><span class="t-li">2)</span> If the pointers are pointers to function and point to the same function, then <i>compare equal</i></div>
<div class="t-li1"><span class="t-li">3)</span> If the pointers are pointers to object and represent the same address, they <i>compare equal</i> (this includes two pointers to non-static members of the same union, pointers to standard-layout struct and to its first member, pointers related by reinterpret_cast, etc)</div>
<div class="t-li1"><span class="t-li">4)</span> All other pointers compare unequal</div>
<p>The result of comparing two pointers to members (after conversions) is defined as follows:
</p>
<div class="t-li1"><span class="t-li">1)</span> If both pointers to member are null member pointer values, they <i>compare equal</i>.</div>
<div class="t-li1"><span class="t-li">2)</span> Otherwise, if only one of two pointers to member is the null member pointer value, they compare unequal.</div>
<div class="t-li1"><span class="t-li">3)</span> Otherwise, if either is a pointer to a virtual member function, the result is unspecified.</div>
<div class="t-li1"><span class="t-li">4)</span> Otherwise, two pointers to member compare equal if and only if they would refer to the same member of the same most derived object or the same subobject if they were dereferenced with a hypothetical object of the associated class type</div>
<div class="t-li1"><span class="t-li">5)</span> Otherwise they compare unequal.</div>
<p>If a pointer <code>p</code> <i>compare equal</i> to pointer <code>q</code>, <code>p<=q</code> and <code>p>=q</code> both yield <code>true</code> and <code>p<q</code> and <code>p>q</code> both yield <code>false</code>.
</p><p>If a pointer <code>p</code> <i>compares greater</i> than a pointer <code>q</code>, then <code>p>=q</code>, <code>p>q</code>, <code>q<=p</code>, and <code>q<p</code> all yield <code>true</code> and <code>p<=q</code>, <code>p<q</code>, <code>q>=p</code>, and <code>q>p</code> all yield <code>false</code>.
</p><p>If two pointers are not specified to compare greater or compare equal, the result of the comparison is unspecified.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=5" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example_2">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 <iostream></span>
<span class="kw1">struct</span> Foo <span class="br0">{</span> <span class="kw4">int</span> n1<span class="sy4">;</span> <span class="kw4">int</span> n2<span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">union</span> Union <span class="br0">{</span> <span class="kw4">int</span> n<span class="sy4">;</span> <span class="kw4">double</span> d<span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <a href="../io/manip/boolalpha.html"><span class="kw1487">std::<span class="me2">boolalpha</span></span></a><span class="sy4">;</span>
 
<span class="kw4">char</span> a<span class="br0">[</span><span class="nu0">4</span><span class="br0">]</span> <span class="sy1">=</span> <span class="st0">"abc"</span><span class="sy4">;</span>
 
<span class="kw4">char</span><span class="sy2">*</span> p1 <span class="sy1">=</span> <span class="sy3">&</span>a<span class="br0">[</span><span class="nu0">1</span><span class="br0">]</span><span class="sy4">;</span>
<span class="kw4">char</span><span class="sy2">*</span> p2 <span class="sy1">=</span> <span class="sy3">&</span>a<span class="br0">[</span><span class="nu0">2</span><span class="br0">]</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Pointers to array elements: p1 == p2 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p1 <span class="sy1">==</span> p2<span class="br0">)</span>
<span class="sy1"><<</span> <span class="st0">", p1 < p2 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p1 <span class="sy1"><</span> p2<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
 
Foo f<span class="sy4">;</span>
<span class="kw4">int</span><span class="sy2">*</span> p3 <span class="sy1">=</span> <span class="sy3">&</span>f.<span class="me1">n1</span><span class="sy4">;</span>
<span class="kw4">int</span><span class="sy2">*</span> p4 <span class="sy1">=</span> <span class="sy3">&</span>f.<span class="me1">n2</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Pointers to members of a class: p3 == p4 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p3 <span class="sy1">==</span> p4<span class="br0">)</span>
<span class="sy1"><<</span> <span class="st0">", p3 < p4 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p3 <span class="sy1"><</span> p4<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
 
Union u<span class="sy4">;</span>
<span class="kw4">int</span><span class="sy2">*</span> p5 <span class="sy1">=</span> <span class="sy3">&</span>u.<span class="me1">n</span><span class="sy4">;</span>
<span class="kw4">double</span><span class="sy2">*</span> p6 <span class="sy1">=</span> <span class="sy3">&</span>u.<span class="me1">d</span><span class="sy4">;</span>
<a href="../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Pointers to members of a union: p5 == (void*)p6 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p5 <span class="sy1">==</span> <span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span><span class="br0">)</span>p6<span class="br0">)</span>
<span class="sy1"><<</span> <span class="st0">", p5 < p6 "</span> <span class="sy1"><<</span> <span class="br0">(</span>p5 <span class="sy1"><</span> <span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span><span class="br0">)</span>p6<span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">}</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">Pointers to array elements: p1 == p2 false, p1 < p2 true
Pointers to members of a class: p3 == p4 false, p3 < p4 true
Pointers to members of a union: p5 == (void*)p6 true, p5 < p6 false</pre></div></div>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=6" title="Edit section: Notes">edit</a>]</span> <span class="mw-headline" id="Notes">Notes</span></h3>
<p>Because these operators group left-to-right, the expression <span class="t-c"><span class="mw-geshi cpp source-cpp">a<span class="sy1"><</span>b<span class="sy1"><</span>c</span></span> is parsed <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">(</span>a<span class="sy1"><</span>b<span class="br0">)</span><span class="sy1"><</span>c</span></span>, and not <span class="t-c"><span class="mw-geshi cpp source-cpp">a<span class="sy1"><</span><span class="br0">(</span>b<span class="sy1"><</span>c<span class="br0">)</span></span></span> or <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">(</span>a<span class="sy1"><</span>b<span class="br0">)</span><span class="sy3">&&</span><span class="br0">(</span>b<span class="sy1"><</span>c<span class="br0">)</span></span></span>.
</p><p>A common requirement for <a href="operators.html#Relational_operators" title="cpp/language/operators">user-defined operator<</a> is <a href="http://en.wikipedia.com/wiki/Strict_weak_ordering" class="extiw" title="enwiki:Strict weak ordering">strict weak ordering</a>. In particular, this is required by the standard algorithms and containers that work with <a href="../concept/Compare.html" title="cpp/concept/Compare"><code>Compare</code></a> types: <span class="t-lc">std::sort</span>, <span class="t-lc">std::max_element</span>, <span class="t-lc">std::map</span>, etc.
</p><p>Although the results of comparing pointers of random origin (e.g. not all pointing to members of the same array) is unspecified, many implementations provide <a href="http://en.wikipedia.com/wiki/Total_order#Strict_total_order" class="extiw" title="enwiki:Total order">strict total ordering</a> of pointers, e.g. if they are implemented as addresses within continuous virtual address space. Those implementations that do not (e.g. where not all bits of the pointer are part of a memory address and have to be ignored for comparison, or an additional calculation is required or otherwise pointer and integer is not a 1 to 1 relationship), provide a specialization of <span class="t-lc">std::less</span> for pointers that has that guarantee. This makes it possible to use all pointers of random origin as keys in standard associative containers such as <span class="t-lc">std::set</span> or <span class="t-lc">std::map</span>.
</p><p>For the types that are both <a href="../concept/EqualityComparable.html" title="cpp/concept/EqualityComparable"><code>EqualityComparable</code></a> and <a href="../concept/LessThanComparable.html" title="cpp/concept/LessThanComparable"><code>LessThanComparable</code></a>, the C++ standard library makes a distinction between <i>equality</i>, which is the value of the expression <span class="t-c"><span class="mw-geshi cpp source-cpp">a <span class="sy1">==</span> b</span></span> and <i>equivalence</i>, which is the value of the expression <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy3">!</span><span class="br0">(</span>a <span class="sy1"><</span> b<span class="br0">)</span> <span class="sy3">&&</span> <span class="sy3">!</span><span class="br0">(</span>b <span class="sy1"><</span> a<span class="br0">)</span></span></span>.
</p><p>Comparison between pointers and null pointer constants was removed in C++14
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw4">void</span> f<span class="br0">(</span><span class="kw4">char</span> <span class="sy2">*</span> p<span class="br0">)</span>
<span class="br0">{</span>
<span class="kw1">if</span> <span class="br0">(</span>p <span class="sy1">></span> <span class="nu0">0</span><span class="br0">)</span> <span class="br0">{</span> ... <span class="br0">}</span> <span class="co1">// OK in C++98..C++11, does not compile in C++14</span>
<span class="kw1">if</span> <span class="br0">(</span>p <span class="sy1">></span> nullptr<span class="br0">)</span> <span class="br0">{</span> ... <span class="br0">}</span> <span class="co1">// OK in C++98..C++11, does not compile in C++14</span>
<span class="br0">}</span></pre></div></div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=7" title="Edit section: Standard library">edit</a>]</span> <span class="mw-headline" id="Standard_library">Standard library</span></h3>
<p>Comparison operators are overloaded for many classes in the standard library.
</p>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../types/type_info/operator_cmp.html" title="cpp/types/type info/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> checks whether the objects refer to the same type <br /> <span class="t-mark">(public member function of <code>std::type_info</code>)</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/types/type_info/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../error/error_code/operator_cmp.html" title="cpp/error/error code/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span></span></a></div></div>
</td>
<td> compares two <code>error_code</code>s <br /> <span class="t-mark">(function)</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/error/error_code/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../error/error_condition/operator_cmp.html" title="cpp/error/error condition/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span></span></a></div></div>
</td>
<td> compares error_conditions and error_codes <br /> <span class="t-mark">(function)</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/error/error_condition/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../utility/pair/operator_cmp.html" title="cpp/utility/pair/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the pair <br /> <span class="t-mark">(function 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/utility/pair/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../utility/tuple/operator_cmp.html" title="cpp/utility/tuple/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the tuple <br /> <span class="t-mark">(function 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/utility/tuple/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../utility/bitset/operator_cmp.html" title="cpp/utility/bitset/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the contents <br /> <span class="t-mark">(public member function of <code>std::bitset</code>)</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/bitset/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../memory/allocator/operator_cmp.html" title="cpp/memory/allocator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two allocator instances <br /> <span class="t-mark">(public member function of <code>std::allocator</code>)</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/allocator/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../memory/unique_ptr/operator_cmp.html" title="cpp/memory/unique ptr/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares to another <code>unique_ptr</code> or with <span class="t-c"><span class="mw-geshi cpp source-cpp">nullptr</span></span> <br /> <span class="t-mark">(function 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/unique_ptr/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../memory/shared_ptr/operator_cmp.html" title="cpp/memory/shared ptr/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares with another <code>shared_ptr</code> or with <span class="t-c"><span class="mw-geshi cpp source-cpp">nullptr</span></span> <br /> <span class="t-mark">(function 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/shared_ptr/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../utility/functional/function/operator_cmp.html" title="cpp/utility/functional/function/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares an <span class="t-lc">std::function</span> with <span class="t-c"><span class="mw-geshi cpp source-cpp">nullptr</span></span> <br /> <span class="t-mark">(function 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/utility/functional/function/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../chrono/duration/operator_cmp.html" title="cpp/chrono/duration/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares two durations <br /> <span class="t-mark">(function 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/chrono/duration/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../chrono/time_point/operator_cmp.html" title="cpp/chrono/time point/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares two time points <br /> <span class="t-mark">(function 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/chrono/time_point/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../memory/scoped_allocator_adaptor/operator_cmp.html" title="cpp/memory/scoped allocator adaptor/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two scoped_allocator_adaptor instances <br /> <span class="t-mark">(public member function of <code>std::scoped_allocator_adaptor</code>)</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/scoped_allocator_adaptor/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../types/type_index/operator_cmp.html" title="cpp/types/type index/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares the underlying <span class="t-lc">std::type_info</span> objects <br /> <span class="t-mark">(public member function of <code>std::type_index</code>)</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/types/type_index/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../string/basic_string/operator_cmp.html" title="cpp/string/basic string/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator></span><span>operator<=</span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares two strings <br /> <span class="t-mark">(function 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/string/basic_string/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../locale/locale/operator_cmp.html" title="cpp/locale/locale/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> equality comparison between locale objects <br /> <span class="t-mark">(public member function of <code>std::locale</code>)</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/locale/locale/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/array/operator_cmp.html" title="cpp/container/array/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the array <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/deque/operator_cmp.html" title="cpp/container/deque/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the deque <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/forward_list/operator_cmp.html" title="cpp/container/forward list/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the forward_list <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/list/operator_cmp.html" title="cpp/container/list/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the list <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/vector/operator_cmp.html" title="cpp/container/vector/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the vector <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/map/operator_cmp.html" title="cpp/container/map/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the map <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/multimap/operator_cmp.html" title="cpp/container/multimap/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the multimap <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/set/operator_cmp.html" title="cpp/container/set/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the set <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/multiset/operator_cmp.html" title="cpp/container/multiset/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the multiset <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/unordered_map/operator_cmp.html" title="cpp/container/unordered map/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the values in the unordered_map <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp_unord&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/unordered_multimap/operator_cmp.html" title="cpp/container/unordered multimap/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the values in the unordered_multimap <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp_unord&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/unordered_set/operator_cmp.html" title="cpp/container/unordered set/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the values in the unordered_set <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp_unord&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/unordered_multiset/operator_cmp.html" title="cpp/container/unordered multiset/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the values in the unordered_multiset <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp_unord&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/queue/operator_cmp.html" title="cpp/container/queue/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the queue <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/stack/operator_cmp.html" title="cpp/container/stack/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the stack <br /> <span class="t-mark">(function 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/container/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../iterator/reverse_iterator/operator_cmp.html" title="cpp/iterator/reverse iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares the underlying iterators <br /> <span class="t-mark">(function 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/iterator/adaptor/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../iterator/move_iterator/operator_cmp.html" title="cpp/iterator/move iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares the underlying iterators <br /> <span class="t-mark">(function 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/iterator/adaptor/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../iterator/istream_iterator/operator_cmp.html" title="cpp/iterator/istream iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two <code>istream_iterator</code>s <br /> <span class="t-mark">(function 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/iterator/istream_iterator/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../iterator/istreambuf_iterator/operator_cmp.html" title="cpp/iterator/istreambuf iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two <code>istreambuf_iterator</code>s <br /> <span class="t-mark">(function 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/iterator/istreambuf_iterator/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../numeric/complex/operator_cmp.html" title="cpp/numeric/complex/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two complex numbers or a complex and a scalar <br /> <span class="t-mark">(function 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/numeric/complex/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../numeric/valarray/operator_cmp.html" title="cpp/numeric/valarray/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares two valarrays or a valarray with a value <br /> <span class="t-mark">(function 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/numeric/valarray/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../numeric/random/linear_congruential_engine/operator_cmp.html" title="cpp/numeric/random/linear congruential engine/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares the internal states of two pseudo-random number engines <br /> <span class="t-mark">(function 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/numeric/random/engine/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../numeric/random/poisson_distribution/operator_cmp.html" title="cpp/numeric/random/poisson distribution/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two distribution objects <br /> <span class="t-mark">(function)</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/numeric/random/distribution/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../regex/sub_match/operator_cmp.html" title="cpp/regex/sub match/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div>
</td>
<td> compares two <code>sub_match</code> objects <br /> <span class="t-mark">(function)</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/regex/sub_match/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../regex/match_results/operator_cmp.html" title="cpp/regex/match results/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> lexicographically compares the values in the two match result <br /> <span class="t-mark">(function 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/regex/match_results/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../regex/regex_iterator/operator_cmp.html" title="cpp/regex/regex iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two <code>regex_iterator</code>s <br /> <span class="t-mark">(public member function of <code>std::regex_iterator</code>)</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/regex/regex_iterator/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../regex/regex_token_iterator/operator_cmp.html" title="cpp/regex/regex token iterator/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div></div>
</td>
<td> compares two <code>regex_token_iterator</code>s <br /> <span class="t-mark">(public member function of <code>std::regex_token_iterator</code>)</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/regex/regex_token_iterator/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../thread/thread/id/operator_cmp.html" title="cpp/thread/thread/id/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator< </span><span> operator<= </span><span> operator> </span><span> operator>=</span></span></a></div></div>
</td>
<td> compares two <code>thread::id</code> objects <br /> <span class="t-mark">(function)</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/thread/thread/id/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../utility/rel_ops/operator_cmp.html" title="cpp/utility/rel ops/operator cmp"> <span class="t-lines"><span>operator!=</span><span>operator></span><span>operator<=</span><span>operator>=</span></span></a></div></div>
</td>
<td> automatically generates comparison operators based on user-defined <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">==</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1"><</span></span></span> <br /> <span class="t-mark">(function 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/utility/rel_ops/dsc_operator_cmp&action=edit">[edit]</a></span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/language/operator_comparison&action=edit&section=8" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<p><a href="operator_precedence.html" title="cpp/language/operator precedence"> Operator precedence</a>
</p><p><a href="operators.html" title="cpp/language/operators"> Operator overloading</a>
</p>
<table class="wikitable">
<tr style="text-align:center">
<th colspan="7"> Common operators
</th></tr>
<tr style="text-align:center">
<td> <a href="operator_assignment.html" title="cpp/language/operator assignment"> assignment</a>
</td>
<td> <a href="operator_incdec.html" title="cpp/language/operator incdec"> increment<br />decrement</a>
</td>
<td> <a href="operator_arithmetic.html" title="cpp/language/operator arithmetic"> arithmetic</a>
</td>
<td> <a href="operator_logical.html" title="cpp/language/operator logical"> logical</a>
</td>
<td> <strong class="selflink"> comparison</strong>
</td>
<td> <a href="operator_member_access.html" title="cpp/language/operator member access"> member<br />access</a>
</td>
<td> <a href="operator_other.html" title="cpp/language/operator other"> other</a>
</td></tr>
<tr style="text-align:center">
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp">a <span class="sy1">=</span> b<br />
a <span class="sy2">+</span><span class="sy1">=</span> b<br />
a <span class="sy2">-</span><span class="sy1">=</span> b<br />
a <span class="sy2">*</span><span class="sy1">=</span> b<br />
a <span class="sy2">/</span><span class="sy1">=</span> b<br />
a <span class="sy2">%</span><span class="sy1">=</span> b<br />
a <span class="sy3">&</span><span class="sy1">=</span> b<br />
a <span class="sy3">|</span><span class="sy1">=</span> b<br />
a <span class="sy3">^</span><span class="sy1">=</span> b<br />
a <span class="sy1"><<=</span> b<br />
a <span class="sy1">>>=</span> b</span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">++</span>a<br />
<span class="sy2">--</span>a<br />
a<span class="sy2">++</span><br />
a<span class="sy2">--</span></span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">+</span>a<br />
<span class="sy2">-</span>a<br />
a <span class="sy2">+</span> b<br />
a <span class="sy2">-</span> b<br />
a <span class="sy2">*</span> b<br />
a <span class="sy2">/</span> b<br />
a <span class="sy2">%</span> b<br />
~a<br />
a <span class="sy3">&</span> b<br />
a <span class="sy3">|</span> b<br />
a <span class="sy3">^</span> b<br />
a <span class="sy1"><<</span> b<br />
a <span class="sy1">>></span> b</span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy3">!</span>a<br />
a <span class="sy3">&&</span> b<br />
a <span class="sy3">||</span> b</span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp">a <span class="sy1">==</span> b<br />
a <span class="sy3">!</span><span class="sy1">=</span> b<br />
a <span class="sy1"><</span> b<br />
a <span class="sy1">></span> b<br />
a <span class="sy1"><=</span> b<br />
a <span class="sy1">>=</span> b</span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp">a<span class="br0">[</span>b<span class="br0">]</span><br />
<span class="sy2">*</span>a<br />
<span class="sy3">&</span>a<br />
a<span class="sy2">-</span><span class="sy1">></span>b<br />
a.<span class="me1">b</span><br />
a<span class="sy2">-</span><span class="sy1">></span><span class="sy2">*</span>b<br />
a.<span class="sy2">*</span>b</span></span>
</p>
</td>
<td>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp">a<span class="br0">(</span>...<span class="br0">)</span><br />
a, b<br />
<span class="sy4">?</span> <span class="sy4">:</span></span></span>
</p>
</td></tr>
<tr>
<th colspan="7"> Special operators
</th></tr>
<tr>
<td colspan="7">
<p><a href="static_cast.html" title="cpp/language/static cast"><tt>static_cast</tt></a> converts one type to another related type <br />
<a href="dynamic_cast.html" title="cpp/language/dynamic cast"><tt>dynamic_cast</tt></a> converts within inheritance hierarchies <br />
<a href="const_cast.html" title="cpp/language/const cast"><tt>const_cast</tt></a> adds or removes <a href="cv.html" title="cpp/language/cv">cv</a> qualifiers<br />
<a href="reinterpret_cast.html" title="cpp/language/reinterpret cast"><tt>reinterpret_cast</tt></a> converts type to unrelated type<br />
<a href="explicit_cast.html" title="cpp/language/explicit cast">C-style cast</a> converts one type to another by a mix of <code>static_cast</code>, <code>const_cast</code>, and <code>reinterpret_cast</code> <br />
<a href="../memory/new/operator_new.html" title="cpp/memory/new/operator new"><tt>new</tt></a> allocates memory<br />
<a href="../memory/new/operator_delete.html" title="cpp/memory/new/operator delete"><tt>delete</tt></a> deallocates memory<br />
<a href="sizeof.html" title="cpp/language/sizeof"><tt>sizeof</tt></a> queries the size of a type<br />
<a href="sizeof....html" title="cpp/language/sizeof..."><tt>sizeof...</tt></a> queries the size of a <a href="parameter_pack.html" title="cpp/language/parameter pack">parameter pack</a> <span class="t-mark-rev t-since-cxx11">(since C++11)</span><br />
<a href="typeid.html" title="cpp/language/typeid"><tt>typeid</tt></a> queries the type information of a type<br />
<a href="noexcept.html" title="cpp/language/noexcept"><tt>noexcept</tt></a> checks if an expression can throw an exception <span class="t-mark-rev t-since-cxx11">(since C++11)</span><br />
<a href="alignof.html" title="cpp/language/alignof"><tt>alignof</tt></a> queries alignment requirements of a type <span class="t-mark-rev t-since-cxx11">(since C++11)</span>
</p>
</td></tr></table>
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