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28<h2><span class="refentrytitle">Class template make_variant_over</span></h2>
29<p>boost::make_variant_over &#8212; <p>Exposes a <code class="computeroutput">variant</code> whose bounded types are the
30          elements of the given type sequence.</p></p>
31</div>
32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
33<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>&lt;<span class="bold"><strong>typename</strong></span> Sequence&gt; 
34<span class="bold"><strong>class</strong></span> make_variant_over {
35<span class="bold"><strong>public</strong></span>:
36  <span class="emphasis"><em>// types</em></span>
37  <span class="bold"><strong>typedef</strong></span> variant&lt; <span class="emphasis"><em>unspecified</em></span> &gt; type;
38};</pre></div>
39<div class="refsect1" lang="en">
40<a name="id1946962"></a><h2>Description</h2>
41<p><code class="computeroutput">type</code> has behavior equivalent in every respect to
42          <code class="computeroutput"><a href="variant.html" title="Class template variant">variant</a>&lt; Sequence[0], Sequence[1], ... &gt;</code>
43          (where <code class="computeroutput">Sequence[<span class="emphasis"><em>i</em></span>]</code> denotes the
44          <span class="emphasis"><em>i</em></span>-th element of <code class="computeroutput">Sequence</code>), except
45          that no upper limit is imposed on the number of types.</p>
46<p><span class="bold"><strong>Notes</strong></span>:</p>
47<div class="itemizedlist"><ul type="disc">
48<li>
49<code class="computeroutput">Sequence</code> must meet the requirements of
50            <a href="../../../libs/mpl/index.html" target="_top">MPL</a>'s <span class="emphasis"><em>Sequence</em></span>
51            concept.</li>
52<li>Due to standard conformance problems in several compilers,
53            <code class="computeroutput">make_variant_over</code> may not be supported on your
54            compiler. See
55            <code class="computeroutput"><a href="../BOOST_VARIANT_NO_TYPE_SEQUENCE_SUPPORT.html" title="Macro BOOST_VARIANT_NO_TYPE_SEQUENCE_SUPPORT">BOOST_VARIANT_NO_TYPE_SEQUENCE_SUPPORT</a></code>
56            for more information.</li>
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