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<a name="boost.signals.scoped_connection"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class scoped_connection</span></h2>
<p>boost::signals::scoped_connection — Limits a signal-slot connection lifetime to a particular scope.</p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../signals/reference.html#header.boost.signals.connection_hpp" title="Header <boost/signals/connection.hpp>">boost/signals/connection.hpp</a>>
</span>
<span class="keyword">class</span> <a class="link" href="scoped_connection.html" title="Class scoped_connection">scoped_connection</a> <span class="special">:</span> <span class="keyword">private</span> noncopyable <span class="comment">// Exposition only</span>
<span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="scoped_connection.html#boost.signals.scoped_connectionconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="scoped_connection.html#idm45506997683616-bb"><span class="identifier">scoped_connection</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="connection.html" title="Class connection">connection</a><span class="special">&</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="scoped_connection.html#idm45507097956512-bb"><span class="special">~</span><span class="identifier">scoped_connection</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="scoped_connection.html#idm45506991789968-bb">connection management</a></span>
<span class="keyword">void</span> <a class="link" href="scoped_connection.html#idm45506991789408-bb"><span class="identifier">disconnect</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="scoped_connection.html#idm45507096702256-bb"><span class="identifier">connected</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm45555133129792"></a><h2>Description</h2>
<div class="refsect2">
<a name="idm45555133129376"></a><h3>
<a name="boost.signals.scoped_connectionconstruct-copy-destruct"></a><code class="computeroutput">scoped_connection</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a name="idm45506997683616-bb"></a><span class="identifier">scoped_connection</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="connection.html" title="Class connection">connection</a><span class="special">&</span> other<span class="special">)</span><span class="special">;</span></pre>
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<td><p><span class="term">Effects:</span></p></td>
<td><p><code class="computeroutput">this</code> references
the connection referenced by
<code class="computeroutput">other</code>.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td><p>Will not throw.</p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm45507097956512-bb"></a><span class="special">~</span><span class="identifier">scoped_connection</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
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<td><p><span class="term">Effects:</span></p></td>
<td><p>If
<code class="computeroutput">this-><a class="link" href="scoped_connection.html#idm45507096702256-bb">connected</a>()</code>,
disconnects the signal-slot connection.</p></td>
</tr></tbody>
</table></div>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idm45555133110672"></a><h3>
<a name="idm45506991789968-bb"></a><code class="computeroutput">scoped_connection</code> connection management</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm45506991789408-bb"></a><span class="identifier">disconnect</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
<col>
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<tbody>
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<td><p><span class="term">Effects:</span></p></td>
<td><p>If
<code class="computeroutput">this-><a class="link" href="scoped_connection.html#idm45507096702256-bb">connected</a>()</code>,
disconnects the signal and slot referenced by this;
otherwise, this operation is a no-op.</p></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p><code class="computeroutput">!this-><a class="link" href="scoped_connection.html#idm45507096702256-bb">connected</a>()</code>.</p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45507096702256-bb"></a><span class="identifier">connected</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
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<td><p><span class="term">Returns:</span></p></td>
<td><p><code class="computeroutput">true</code> if this
references a non-NULL connection that is still active
(connected), and <code class="computeroutput">false</code>
otherwise.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td><p>Will not throw.</p></td>
</tr>
</tbody>
</table></div>
</li>
</ol></div>
</div>
</div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2004 Douglas Gregor<p>Use, modification and distribution is subject to the Boost
Software License, Version 1.0. (See accompanying file
<code class="filename">LICENSE_1_0.txt</code> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</p>
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