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href="../../boost_typeindex_header_reference.html#header.boost.type_index.runtime_cast.boost_shared_ptr_cast_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="runtime_cast_idp760960208.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="refentry"> +<a name="boost.typeindex.runtime_point_idp760952592"></a><div class="titlepage"></div> +<div class="refnamediv"> +<h2><span class="refentrytitle">Function template runtime_pointer_cast</span></h2> +<p>boost::typeindex::runtime_pointer_cast — Creates a new instance of std::shared_ptr whose stored pointer is obtained from u's stored pointer using a runtime_cast. </p> +</div> +<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="comment">// In header: <<a class="link" href="../../boost_typeindex_header_reference.html#header.boost.type_index.runtime_cast.boost_shared_ptr_cast_hpp" title="Header <boost/type_index/runtime_cast/boost_shared_ptr_cast.hpp>">boost/type_index/runtime_cast/boost_shared_ptr_cast.hpp</a>> + +</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> U<span class="special">></span> + <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span> + <span class="identifier">runtime_pointer_cast</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span> <span class="identifier">U</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> u<span class="special">)</span><span class="special">;</span></pre></div> +<div class="refsect1"> +<a name="idp570916880"></a><h2>Description</h2> +<p>The new shared_ptr will share ownership with u, except that it is empty if the runtime_cast performed by runtime_pointer_cast returns a null pointer. + +</p> +<div class="variablelist"><table border="0" class="variablelist compact"> +<colgroup> +<col align="left" valign="top"> +<col> +</colgroup> +<tbody> +<tr> +<td><p><span class="term">Template Parameters:</span></p></td> +<td><div class="variablelist"><table border="0" class="variablelist compact"> +<colgroup> +<col align="left" valign="top"> +<col> +</colgroup> +<tbody> +<tr> +<td><p><span class="term"><code class="computeroutput">T</code></span></p></td> +<td><p>The desired target type to return a pointer of. </p></td> +</tr> +<tr> +<td><p><span class="term"><code class="computeroutput">U</code></span></p></td> +<td><p>A complete class type of the source instance pointed to from u. </p></td> +</tr> +</tbody> +</table></div></td> +</tr> +<tr> +<td><p><span class="term">Returns:</span></p></td> +<td><p>If there exists a valid conversion from U* to T*, returns a boost::shared_ptr<T> that points to an address suitably offset from u. If no such conversion exists, returns boost::shared_ptr<T>(); </p></td> +</tr> +</tbody> +</table></div> +</div> +</div> +<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> +<td align="left"></td> +<td align="right"><div class="copyright-footer">Copyright © 2012-2016 Antony Polukhin<p> + Distributed under the Boost Software License, Version 1.0. (See accompanying + 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>) + </p> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="ctti_type_index.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_typeindex_header_reference.html#header.boost.type_index.runtime_cast.boost_shared_ptr_cast_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="runtime_cast_idp760960208.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |