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| 26 | <a name="any_cast"></a><div class="titlepage"></div> |
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| 27 | <div class="refnamediv"> |
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| 28 | <h2><span class="refentrytitle">Function any_cast</span></h2> |
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| 29 | <p>boost::any_cast — <p>Custom keyword cast for extracting a value |
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| 30 | of a given type from an |
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| 31 | <code class="computeroutput"><a href="boost/any.html" title="Class any">any</a></code>.</p></p> |
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| 32 | </div> |
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| 33 | <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
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| 34 | <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"> |
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| 35 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T> <span class="type">T</span> any_cast(<a href="boost/any.html" title="Class any">any</a> & operand); |
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| 36 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T> <span class="type">T</span> any_cast(<span class="bold"><strong>const</strong></span> <a href="boost/any.html" title="Class any">any</a> & operand); |
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| 37 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> ValueType> <span class="type"><span class="bold"><strong>const</strong></span> ValueType *</span> any_cast(<span class="bold"><strong>const</strong></span> <a href="boost/any.html" title="Class any">any</a> * operand); |
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| 38 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> ValueType> <span class="type">ValueType *</span> any_cast(<a href="boost/any.html" title="Class any">any</a> * operand);</pre></div> |
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| 39 | <div class="refsect1" lang="en"> |
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| 40 | <a name="id2572174"></a><h2>Description</h2> |
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| 41 | <p><b xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision"><span class="term">Returns</span></b>: |
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| 42 | |
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| 43 | If passed a pointer, it returns a |
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| 44 | similarly qualified pointer to the value content if |
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| 45 | successful, otherwise null is returned. |
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| 46 | If T is ValueType, it returns a copy of the held value, otherwise, if T is a reference |
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| 47 | to (possibly const qualified) ValueType, it returns a reference to the held |
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| 48 | value.<br><b xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision"><span class="term">Throws</span></b>: |
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| 49 | |
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| 50 | Overloads taking an |
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| 51 | <code class="computeroutput"><a href="boost/any.html" title="Class any">any</a></code> pointer do not |
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| 52 | throw; overloads taking an |
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| 53 | <code class="computeroutput"><a href="boost/any.html" title="Class any">any</a></code> value or reference |
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| 54 | throws <code class="computeroutput"><a href="bad_any_cast.html" title="Class bad_any_cast">bad_any_cast</a></code> if |
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| 55 | unsuccessful.</p> |
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| 56 | </div> |
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| 57 | </div> |
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| 58 | <table width="100%"><tr> |
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| 59 | <td align="left"></td> |
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| 60 | <td align="right"><small>Copyright © 2001 Kevlin Henney</small></td> |
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