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<div class="refentry" title="Class template signal">
<a name="boost.signal"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template signal</span></h2>
<p>boost::signal — Safe multicast callback.</p>
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<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="emphasis"><em>// In header: <<a class="link" href="../signals/reference.html#header.boost.signal_hpp" title="Header <boost/signal.hpp>">boost/signal.hpp</a>>
</em></span><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="emphasis"><em> // Function type R (T1, T2, ..., TN)</em></span>
<span class="bold"><strong>typename</strong></span> Combiner = <a class="link" href="last_value.html" title="Class template last_value">last_value</a><R>,
<span class="bold"><strong>typename</strong></span> Group = <span class="bold"><strong>int</strong></span>,
<span class="bold"><strong>typename</strong></span> GroupCompare = std::less<Group>,
<span class="bold"><strong>typename</strong></span> SlotFunction = <a class="link" href="functionN.html" title="Class template functionN">functionN</a><Signature> >
<span class="bold"><strong>class</strong></span> <a class="link" href="signal.html" title="Class template signal">signal</a> : <span class="bold"><strong>public</strong></span> <a class="link" href="signalN.html" title="Class template signalN">signalN</a><R, T1, T2, ..., TN, Combiner, Group, GroupCompare, SlotFunction>
{
<span class="bold"><strong>public</strong></span>:
<span class="emphasis"><em>// <a class="link" href="signal.html#boost.signalconstruct-copy-destruct">construct/copy/destruct</a></em></span>
<a class="link" href="signal.html#id642910-bb">signal</a>(<span class="bold"><strong>const</strong></span> combiner_type& = combiner_type(),
<span class="bold"><strong>const</strong></span> group_compare_type& = group_compare_type());
};</pre></div>
<div class="refsect1" title="Description">
<a name="id1691232"></a><h2>Description</h2>
<p>Class template <a class="link" href="signal.html" title="Class template signal">signal</a> is a thin
wrapper around the numbered class templates <a class="link" href="signalN.html" title="Class template signalN">signal0</a>, <a class="link" href="signalN.html" title="Class template signalN">signal1</a>, etc. It accepts a function
type with N arguments instead of N separate arguments, and
derives from the appropriate <a class="link" href="signalN.html" title="Class template signalN">signalN</a>
instantiation.</p>
<p>All functionality of this class template is in its base
class <a class="link" href="signalN.html" title="Class template signalN">signalN</a>.</p>
<div class="refsect2" title="signal public construct/copy/destruct">
<a name="id1691281"></a><h3>
<a name="boost.signalconstruct-copy-destruct"></a><code class="computeroutput">signal</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="id642910-bb"></a>signal(<span class="bold"><strong>const</strong></span> combiner_type& combiner = combiner_type(),
<span class="bold"><strong>const</strong></span> group_compare_type& compare = group_compare_type());</pre>
<div class="variablelist"><table border="0">
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<td><p><span class="term">Effects:</span></p></td>
<td>Initializes the base class with the given combiner
and comparison objects.</td>
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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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