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<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
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<span class="comment">// Throws: std::bad_cast if ( dynamic_cast<Derived>(x) == 0 )</span>
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<span class="comment">// Returns: dynamic_cast<Derived>(x)</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Base</span><span class="special">></span>
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<span class="keyword">inline</span> <span class="identifier">Derived</span> <span class="identifier">polymorphic_cast</span><span class="special">(</span><span class="identifier">Base</span><span class="special">*</span> <span class="identifier">x</span><span class="special">);</span>
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<span class="comment">// Effects: assert( dynamic_cast<Derived>(x) == x );</span>
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<span class="comment">// Returns: static_cast<Derived>(x)</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Base</span><span class="special">></span>
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<span class="keyword">inline</span> <span class="identifier">Derived</span> <span class="identifier">polymorphic_downcast</span><span class="special">(</span><span class="identifier">Base</span><span class="special">*</span> <span class="identifier">x</span><span class="special">);</span>
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<span class="comment">// Effects: assert( dynamic_cast<Derived>(&x) == &x );</span>
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<span class="comment">// Returns: static_cast<Derived>(x)</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Base</span><span class="special">></span>
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<span class="keyword">inline</span> <span class="identifier">Derived</span> <span class="identifier">polymorphic_downcast</span><span class="special">(</span><span class="identifier">Base</span><span class="special">&</span> <span class="identifier">x</span><span class="special">);</span>
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<span class="comment">// Throws: std::bad_cast if ( dynamic_pointer_cast<Derived>(x) == 0 )</span>
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<span class="comment">// Returns: dynamic_pointer_cast<Derived>(x)</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Base</span><span class="special">></span>
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<span class="keyword">inline</span> <span class="keyword">auto</span> <span class="identifier">polymorphic_pointer_cast</span><span class="special">(</span><span class="identifier">Base</span> <span class="identifier">x</span><span class="special">);</span>
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<span class="comment">// Effects: assert( dynamic_pointer_cast<Derived>(x) == x );</span>
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<span class="comment">// Returns: static_pointer_cast<Derived>(x)</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Base</span><span class="special">></span>
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<span class="keyword">inline</span> <span class="keyword">auto</span> <span class="identifier">polymorphic_pointer_downcast</span><span class="special">(</span><span class="identifier">Base</span> <span class="identifier">x</span><span class="special">);</span>
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<span class="special">}</span>
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</pre>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2001 Beman Dawes<br>Copyright © 2014-2021 Antony Polukhin<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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