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56 lines
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56 lines
3.6 KiB
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<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>
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<head>
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<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/>
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<title>clone_exception</title>
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<link href='reno.css' type='text/css' rel='stylesheet'/>
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<a href="http://www.boost.org"><img style="border:0" src="http://www.boost.org/boost.png" alt="Boost" width="277" height="86"/></a>
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</div>
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<h1>Boost Exception</h1>
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</div>
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<div class="RenoIncludeDIV"><h3>clone_exception()</h3>
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<div class="RenoIncludeDIV"><p><tt>#include <<span class="RenoLink"><a href="exception_cloning_hpp.html">boost/exception/cloning.hpp</a></span>></tt></p>
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<pre>namespace
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boost
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{
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<span class="RenoIncludeSPAN"> template <class T>
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<span class="RenoLink"><a href="exception_ptr.html">exception_ptr</a></span> <span class="RenoLink"><a href="clone_exception.html">clone_exception</a></span>( T const & e );</span>
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}</pre>
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</div><h4>Requirements:</h4>
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<p><tt>T</tt> must be polymorphic.</p>
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<h4>Returns:</h4>
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<div><ul><li> If <tt><span class="RenoLink"><a href="enable_exception_cloning.html">enable_exception_cloning</a></span>()</tt> was not used at the time the exception object was passed to <tt>throw</tt>, the returned <tt><span class="RenoLink"><a href="exception_ptr.html">exception_ptr</a></span></tt> refers to an instance of <tt><span class="RenoLink"><a href="unknown_exception.html">unknown_exception</a></span></tt>. In this case, if the original exception object derives from <tt>boost::<span class="RenoLink"><a href="exception.html">exception</a></span></tt>, then the <tt>boost::<span class="RenoLink"><a href="exception.html">exception</a></span></tt> sub-object of the <tt><span class="RenoLink"><a href="unknown_exception.html">unknown_exception</a></span></tt> object is initialized by the <tt>boost::<span class="RenoLink"><a href="exception.html">exception</a></span></tt> copy constructor;</li>
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<li> Otherwise, if the attempt to clone the exception results in a <tt>std::bad_alloc</tt> exception, the returned <tt><span class="RenoLink"><a href="exception_ptr.html">exception_ptr</a></span></tt> refers to an instance of <tt>std::bad_alloc</tt>;</li>
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<li> Otherwise, the returned <tt><span class="RenoLink"><a href="exception_ptr.html">exception_ptr</a></span></tt> refers to a copy of <tt>e</tt>.</li>
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</ul></div>
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<h4>Note:</h4>
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<p>It is unspecified whether the return values of two successive calls to <tt><span class="RenoLink"><a href="clone_exception.html">clone_exception</a></span>()</tt> refer to the same exception object.</p>
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</div><h3>See also:</h3>
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<div class="RenoPageList"><a href="boost-exception.html">Boost Exception<br/>
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</a><a href="enable_exception_cloning.html">enable_exception_cloning<br/>
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</a><a href="unknown_exception.html">unknown_exception<br/>
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</a></div>
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<div id="footer">
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<p> </p>
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<hr/>
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<p>
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<a class="logo" href="http://jigsaw.w3.org/css-validator/validator?uri=http://revergestudios.com/boost-exception/reno.css"><img class="logo_pic" src="valid-css.png" alt="Valid CSS" height="31" width="88"/></a>
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<small>Copyright (c) 2006-2008 by Emil Dotchevski and Reverge Studios, Inc.<br/>
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Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small>
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</p>
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</div>
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