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<a name="asio.reference.associated_cancellation_slot"></a><a class="link" href="associated_cancellation_slot.html" title="associated_cancellation_slot">associated_cancellation_slot</a>
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<p>
<a class="indexterm" name="asio.indexterm.associated_cancellation_slot"></a>
</p>
<p>
Traits type used to obtain the <a class="link" href="cancellation_slot.html" title="cancellation_slot"><code class="computeroutput"><span class="identifier">cancellation_slot</span></code></a> associated with
an object.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
<span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="CancellationSlot.html" title="Cancellation slot requirements">CancellationSlot</a> <span class="special">=</span> <span class="identifier">cancellation_slot</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">associated_cancellation_slot</span>
</pre>
<h5>
<a name="asio.reference.associated_cancellation_slot.h0"></a>
<span><a name="asio.reference.associated_cancellation_slot.types"></a></span><a class="link" href="associated_cancellation_slot.html#asio.reference.associated_cancellation_slot.types">Types</a>
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<a class="link" href="associated_cancellation_slot/type.html" title="associated_cancellation_slot::type"><span class="bold"><strong>type</strong></span></a>
</p>
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<td>
<p>
If T has a nested type cancellation_slot_type, T::cancellation_slot_type.
Otherwise CancellationSlot.
</p>
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<h5>
<a name="asio.reference.associated_cancellation_slot.h1"></a>
<span><a name="asio.reference.associated_cancellation_slot.member_functions"></a></span><a class="link" href="associated_cancellation_slot.html#asio.reference.associated_cancellation_slot.member_functions">Member
Functions</a>
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<p>
<a class="link" href="associated_cancellation_slot/decltype.html" title="associated_cancellation_slot::decltype"><span class="bold"><strong>decltype</strong></span></a> <span class="silver">[static]</span>
</p>
</td>
<td>
<p>
If T has a nested type cancellation_slot_type, returns t.get_cancellation_slot().
Otherwise returns type(). <br> <span class="silver"> —</span><br> If T has a nested type
cancellation_slot_type, returns t.get_cancellation_slot(). Otherwise
returns s.
</p>
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<h5>
<a name="asio.reference.associated_cancellation_slot.h2"></a>
<span><a name="asio.reference.associated_cancellation_slot.data_members"></a></span><a class="link" href="associated_cancellation_slot.html#asio.reference.associated_cancellation_slot.data_members">Data Members</a>
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<a class="link" href="associated_cancellation_slot/noexcept.html" title="associated_cancellation_slot::noexcept"><span class="bold"><strong>noexcept</strong></span></a>
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<p>
A program may specialise this traits type if the <code class="computeroutput"><span class="identifier">T</span></code>
template parameter in the specialisation is a user-defined type. The template
parameter <code class="computeroutput"><span class="identifier">CancellationSlot</span></code>
shall be a type meeting the CancellationSlot requirements.
</p>
<p>
Specialisations shall meet the following requirements, where <code class="computeroutput"><span class="identifier">t</span></code> is a const reference to an object of
type <code class="computeroutput"><span class="identifier">T</span></code>, and <code class="computeroutput"><span class="identifier">s</span></code> is an object of type <code class="computeroutput"><span class="identifier">CancellationSlot</span></code>.
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Provide a nested typedef <code class="computeroutput"><span class="identifier">type</span></code>
that identifies a type meeting the CancellationSlot requirements.
</li>
<li class="listitem">
Provide a noexcept static member function named <code class="computeroutput"><span class="identifier">get</span></code>,
callable as <code class="computeroutput"><span class="identifier">get</span><span class="special">(</span><span class="identifier">t</span><span class="special">)</span></code>
and with return type <code class="computeroutput"><span class="identifier">type</span></code>
or a (possibly const) reference to <code class="computeroutput"><span class="identifier">type</span></code>.
</li>
<li class="listitem">
Provide a noexcept static member function named <code class="computeroutput"><span class="identifier">get</span></code>,
callable as <code class="computeroutput"><span class="identifier">get</span><span class="special">(</span><span class="identifier">t</span><span class="special">,</span><span class="identifier">s</span><span class="special">)</span></code>
and with return type <code class="computeroutput"><span class="identifier">type</span></code>
or a (possibly const) reference to <code class="computeroutput"><span class="identifier">type</span></code>.
</li>
</ul></div>
<h5>
<a name="asio.reference.associated_cancellation_slot.h3"></a>
<span><a name="asio.reference.associated_cancellation_slot.requirements"></a></span><a class="link" href="associated_cancellation_slot.html#asio.reference.associated_cancellation_slot.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/associated_cancellation_slot.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
</p>
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<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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