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4<title>Function any_cast</title>
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28<h2><span class="refentrytitle">Function any_cast</span></h2>
29<p>boost::any_cast &#8212; <p>Custom keyword cast for extracting a value
30          of a given type from an
31          <code class="computeroutput"><a href="any.html" title="Class any">any</a></code>.</p></p>
32</div>
33<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
34<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis">
35<span class="bold"><strong>template</strong></span>&lt;<span class="bold"><strong>typename</strong></span> T&gt; <span class="type">T</span> any_cast(<a href="any.html" title="Class any">any</a> &amp; operand);
36<span class="bold"><strong>template</strong></span>&lt;<span class="bold"><strong>typename</strong></span> T&gt; <span class="type">T</span> any_cast(<span class="bold"><strong>const</strong></span> <a href="any.html" title="Class any">any</a> &amp; operand);
37<span class="bold"><strong>template</strong></span>&lt;<span class="bold"><strong>typename</strong></span> ValueType&gt; <span class="type"><span class="bold"><strong>const</strong></span> ValueType *</span> any_cast(<span class="bold"><strong>const</strong></span> <a href="any.html" title="Class any">any</a> * operand);
38<span class="bold"><strong>template</strong></span>&lt;<span class="bold"><strong>typename</strong></span> ValueType&gt; <span class="type">ValueType *</span> any_cast(<a href="any.html" title="Class any">any</a> * operand);</pre></div>
39<div class="refsect1" lang="en">
40<a name="id938535"></a><h2>Description</h2>
41<div class="variablelist"><table border="0">
42<col align="left" valign="top">
43<tbody>
44<tr>
45<td>
46<span class="term">Returns:</span></td>
47<td> If passed a pointer, it returns a
48          similarly qualified pointer to the value content if
49          successful, otherwise null is returned.
50          If T is ValueType, it returns a copy of the held value, otherwise, if T is a reference
51          to (possibly const qualified) ValueType, it returns a reference to the held
52          value.</td>
53</tr>
54<tr>
55<td>
56<span class="term">Throws:</span></td>
57<td>Overloads taking an
58          <code class="computeroutput"><a href="any.html" title="Class any">any</a></code> pointer do not
59          throw; overloads taking an
60          <code class="computeroutput"><a href="any.html" title="Class any">any</a></code> value or reference
61          throws <code class="computeroutput"><a href="bad_any_cast.html" title="Class bad_any_cast">bad_any_cast</a></code> if
62          unsuccessful.</td>
63</tr>
64</tbody>
65</table></div>
66</div>
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69<td align="left"></td>
70<td align="right"><small>Copyright © 2001 Kevlin Henney</small></td>
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