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3.2 KiB
HTML
62 lines
3.2 KiB
HTML
<html>
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<head>
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<!-- Generated by the Spirit (http://spirit.sf.net) QuickDoc -->
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<title>Exception Translation</title>
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<td><img src="theme/c%2B%2Bboost.gif">
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<td width="85%">
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<font size="6" face="Verdana, Arial, Helvetica, sans-serif"><b>Exception Translation</b></font>
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</table>
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<br>
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<table border="0">
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<p>
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All C++ exceptions must be caught at the boundary with Python code. This
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boundary is the point where C++ meets Python. Boost.Python provides a
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default exception handler that translates selected standard exceptions,
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then gives up:</p>
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<code><pre>
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<span class=identifier>raise </span><span class=identifier>RuntimeError</span><span class=special>, </span><span class=literal>'unidentifiable C++ Exception'
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</span></pre></code>
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<p>
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Users may provide custom translation. Here's an example:</p>
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<code><pre>
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<span class=keyword>struct </span><span class=identifier>PodBayDoorException</span><span class=special>;
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</span><span class=keyword>void </span><span class=identifier>translator</span><span class=special>(</span><span class=identifier>PodBayDoorException </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>x</span><span class=special>) {
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</span><span class=identifier>PyErr_SetString</span><span class=special>(</span><span class=identifier>PyExc_UserWarning</span><span class=special>, </span><span class=string>"I'm sorry Dave..."</span><span class=special>);
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}
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</span><span class=identifier>BOOST_PYTHON_MODULE</span><span class=special>(</span><span class=identifier>kubrick</span><span class=special>) {
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</span><span class=identifier>register_exception_translator</span><span class=special><
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</span><span class=identifier>PodBayDoorException</span><span class=special>>(</span><span class=identifier>translator</span><span class=special>);
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...
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</span></pre></code>
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<tr>
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</tr>
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</table>
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<br>
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<hr size="1"><p class="copyright">Copyright © 2002-2003 David Abrahams<br>Copyright © 2002-2003 Joel de Guzman<br><br>
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<font size="2">Permission to copy, use, modify, sell and distribute this document
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is granted provided this copyright notice appears in all copies. This document
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is provided "as is" without express or implied warranty, and with
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no claim as to its suitability for any purpose. </font> </p>
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