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<title>Function template operator<<</title>
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<h2><span class="refentrytitle">Function template operator<<</span></h2>
<p>boost::operator<< — Provides streaming output for <code class="computeroutput">variant</code> types.</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="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> ElemType, <span class="bold"><strong>typename</strong></span> Traits, <span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ...,
<span class="bold"><strong>typename</strong></span> TN>
<span class="type">std::basic_ostream<ElemType,Traits> &</span>
<span class="bold"><strong>operator</strong></span><<(std::basic_ostream<ElemType,Traits> & out,
<span class="bold"><strong>const</strong></span> <a href="boost/variant.html" title="Class template variant">variant</a><T1, T2, ..., TN> & rhs);</pre></div>
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<a name="id2835702"></a><h2>Description</h2>
<p><b xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision"><span class="term">Requires</span></b>:
Every bounded type of the <code class="computeroutput">variant</code> must
fulfill the requirements of the
<a href="variant/reference.html#variant.concepts.output-streamable" title="OutputStreamable"><span class="emphasis"><em>OutputStreamable</em></span></a>
concept.<br><b xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision"><span class="term">Effects</span></b>:
Calls <code class="computeroutput">out << x</code>, where <code class="computeroutput">x</code> is
the content of <code class="computeroutput">rhs</code>.</p>
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