76 lines
4.3 KiB
HTML
76 lines
4.3 KiB
HTML
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN'
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'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'>
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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>diagnostic information</title>
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<link href='reno.css' type='text/css' rel='stylesheet'/>
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</head>
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<body>
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<div class="body-0">
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<div class="body-1">
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<div class="body-2">
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<div>
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<div id="boost_logo">
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<a href="http://www.boost.org"><img style="border:0" src="../../../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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<!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
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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 http://www.boost.org/LICENSE_1_0.txt) -->
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<div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h2>Diagnostic Information</h2>
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</div>
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<p>Boost Exception provides a namespace-scope function <span class="RenoLink"><a href="diagnostic_information.html">diagnostic_information</a></span> which takes a boost::<span class="RenoLink"><a href="exception.html">exception</a></span>. The returned string contains:</p>
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<div><ul><li>the string representation of all data objects added to the boost::<span class="RenoLink"><a href="exception.html">exception</a></span> through <span class="RenoLink"><a href="exception_operator_shl.html">operator<<</a></span>;</li>
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<li>the output from std::exception::what;</li>
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<li>additional platform-specific diagnostic information.</li>
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</ul></div>
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<p>The returned string is not presentable as a friendly user message, but because it is generated automatically, it is useful for debugging or logging purposes. Here is an example:</p>
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<pre>#include <<span class="RenoLink"><a href="boost_exception_all_hpp.html">boost/exception/all.hpp</a></span>>
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#include <iostream>
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void f(); //throws unknown types that derive from boost::<span class="RenoLink"><a href="exception.html">exception</a></span>.
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void
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g()
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{
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try
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{
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f();
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}
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catch(
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boost::<span class="RenoLink"><a href="exception.html">exception</a></span> & e )
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{
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std::cerr << <span class="RenoLink"><a href="diagnostic_information.html">diagnostic_information</a></span>(e);
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}
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}</pre>
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<div class="RenoIncludeDIV"><h4>Example:</h4>
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<p>this is a possible output from the <span class="RenoLink"><a href="diagnostic_information.html">diagnostic_information</a></span> function, as used in <i>libs/exception/example/example_io.cpp:</i></p>
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<pre>example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *)
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Dynamic exception type: class boost::exception_detail::clone_impl<struct fopen_error>
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std::exception::what: example_io error
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[struct boost::<span class="RenoLink"><a href="errinfo_api_function.html">errinfo_api_function</a></span>_ *] = fopen
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[struct boost::<span class="RenoLink"><a href="errinfo_errno.html">errinfo_errno</a></span>_ *] = 2, "No such file or directory"
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[struct boost::<span class="RenoLink"><a href="errinfo_file_name.html">errinfo_file_name</a></span>_ *] = tmp1.txt
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[struct boost::<span class="RenoLink"><a href="errinfo_file_open_mode.html">errinfo_file_open_mode</a></span>_ *] = rb</pre>
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</div></div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div>
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See also: <span class="RenoPageList"><a href="boost-exception.html">Boost Exception</a></span>
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</div>
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<!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
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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 http://www.boost.org/LICENSE_1_0.txt) -->
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<div id="footer">
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<p>
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<a class="logo" href="http://jigsaw.w3.org/css-validator/check/referer"><img class="logo_pic" src="valid-css.png" alt="Valid CSS" height="31" width="88"/></a>
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<a class="logo" href="http://validator.w3.org/check?uri=referer"><img class="logo_pic" src="valid-xhtml.png" alt="Valid XHTML 1.0" height="31" width="88"/></a>
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<small>Copyright (c) 2006-2009 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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</div>
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</div>
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</div>
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</body>
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</html>
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