projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | <!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' |
| 2 | 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'> | |
| 3 | <html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'> | |
| 4 | <head> | |
| 5 | <meta http-equiv='Content-Type' content='text/html; charset=utf-8'/> | |
| 6 | <title>diagnostic information</title> | |
| 7 | <link href='reno.css' type='text/css' rel='stylesheet'/> | |
| 8 | </head> | |
| 9 | <body> | |
| 10 | <div class="body-0"> | |
| 11 | <div class="body-1"> | |
| 12 | <div class="body-2"> | |
| 13 | <div> | |
| 14 | <div id="boost_logo"> | |
| 15 | <a href="http://www.boost.org"><img style="border:0" src="../../../boost.png" alt="Boost" width="277" height="86"/></a> | |
| 16 | </div> | |
| 17 | <h1>Boost Exception</h1> | |
| 18 | </div> | |
| 19 | <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 20 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 21 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 22 | <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h2>Diagnostic Information</h2> | |
| 23 | </div> | |
| 24 | <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> | |
| 25 | <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> | |
| 26 | <li>the output from std::exception::what;</li> | |
| 27 | <li>additional platform-specific diagnostic information.</li> | |
| 28 | </ul></div> | |
| 29 | <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> | |
| 30 | <pre>#include <<span class="RenoLink"><a href="boost_exception_all_hpp.html">boost/exception/all.hpp</a></span>> | |
| 31 | #include <iostream> | |
| 32 | ||
| 33 | void f(); //throws unknown types that derive from boost::<span class="RenoLink"><a href="exception.html">exception</a></span>. | |
| 34 | ||
| 35 | void | |
| 36 | g() | |
| 37 | { | |
| 38 | try | |
| 39 | { | |
| 40 | f(); | |
| 41 | } | |
| 42 | catch( | |
| 43 | boost::<span class="RenoLink"><a href="exception.html">exception</a></span> & e ) | |
| 44 | { | |
| 45 | std::cerr << <span class="RenoLink"><a href="diagnostic_information.html">diagnostic_information</a></span>(e); | |
| 46 | } | |
| 47 | }</pre> | |
| 48 | <div class="RenoIncludeDIV"><h4>Example:</h4> | |
| 49 | <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> | |
| 50 | <pre>example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *) | |
| 51 | Dynamic exception type: class boost::exception_detail::clone_impl<struct fopen_error> | |
| 52 | std::exception::what: example_io error | |
| 53 | [struct boost::<span class="RenoLink"><a href="errinfo_api_function.html">errinfo_api_function</a></span>_ *] = fopen | |
| 54 | [struct boost::<span class="RenoLink"><a href="errinfo_errno.html">errinfo_errno</a></span>_ *] = 2, "No such file or directory" | |
| 55 | [struct boost::<span class="RenoLink"><a href="errinfo_file_name.html">errinfo_file_name</a></span>_ *] = tmp1.txt | |
| 56 | [struct boost::<span class="RenoLink"><a href="errinfo_file_open_mode.html">errinfo_file_open_mode</a></span>_ *] = rb</pre> | |
| 57 | </div></div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div> | |
| 58 | See also: <span class="RenoPageList"><a href="boost-exception.html">Boost Exception</a></span> | |
| 59 | </div> | |
| 60 | <!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 61 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 62 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 63 | <div id="footer"> | |
| 64 | <p> | |
| 65 | <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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| 67 | <small>Copyright (c) 2006-2009 by Emil Dotchevski and Reverge Studios, Inc.<br/> | |
| 68 | Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small> | |
| 69 | </p> | |
| 70 | </div> | |
| 71 | </div> | |
| 72 | </div> | |
| 73 | </div> | |
| 74 | </body> | |
| 75 | </html> |