2003-05-17 11:45:48 +00:00
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2005-01-13 17:06:21 +00:00
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<title>Boost.Regex: regex_error</title>
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2003-05-17 11:45:48 +00:00
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<td valign="top" width="300">
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2004-10-05 15:45:52 +00:00
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<h3><a href="../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../boost.png" border="0"></a></h3>
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</td>
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<td width="353">
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<h1 align="center">Boost.Regex</h1>
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<h2 align="center">class regex_error</h2>
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</td>
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<td width="50">
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<h3><a href="index.html"><img height="45" width="43" alt="Boost.Regex Index" src="uarrow.gif" border="0"></a></h3>
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<h3>Synopsis</h3>
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2003-05-24 11:13:26 +00:00
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<p>#include <<a href="../../../boost/regex/pattern_except.hpp">boost/pattern_except.hpp</a>></p>
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<p>The class <code>regex_error</code> defines the type of objects thrown as
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exceptions to report errors during the conversion from a string representing a
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regular expression to a finite state machine. </p>
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<pre>
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<b>namespace</b> boost{
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<b>class</b> regex_error : <b>public</b> std::runtime_error
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{
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<b>public</b>:
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<b>explicit</b> regex_error(<b>const</b> std::string& s, <a href="error_type.html">regex_constants::error_type err</a>, std::ptrdiff_t pos);
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<b>explicit</b> regex_error(<a href="error_type.html">boost::regex_constants::error_type err</a>);
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<a href="error_type.html">boost::regex_constants::error_type</a> code()<b>const</b>;
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std::ptrdiff_t position()<b>const</b>;
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};
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typedef regex_error bad_pattern; // for backwards compatibility
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typedef regex_error bad_expression; // for backwards compatibility
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} // namespace boost
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</pre>
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<h3>Description</h3>
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<pre>
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regex_error(<b>const</b> std::string& s, <a href="error_type.html">regex_constants::error_type</a> err, std::ptrdiff_t pos);
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regex_error(<a href="error_type.html">boost::regex_constants::error_type err</a>);</pre>
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<p><b>Effects:</b> Constructs an object of class <code>regex_error</code>.</p>
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<pre>
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<a href="error_type.html">boost::regex_constants::error_type</a> code()<b>const</b>;</pre>
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<p><b>Effects:</b> returns the error code that represents parsing error that occurred.</p>
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<pre>
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std::ptrdiff_t position()<b>const</b>; </pre>
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<p><b>Effects:</b> returns the location in the expression where parsing stopped.</p>
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<P>Footnotes: the choice of <code>std::runtime_error</code> as the base class for <code>
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regex_error</code> is moot; depending upon how the library is used
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exceptions may be either logic errors (programmer supplied expressions) or run
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time errors (user supplied expressions). The library previously used <code>bad_pattern</code>
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and <code>bad_expression</code> for errors, these have been replaced by the
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single class <code>regex_error</code> to keep the library in synchronization
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with the standardization proposal.</P>
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<p></p>
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<hr>
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<p>Revised
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<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
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24 June 2004
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<!--webbot bot="Timestamp" endspan i-checksum="39359" --></p>
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<p><i><EFBFBD> Copyright John Maddock 1998-
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<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%Y" startspan --> 2004<!--webbot bot="Timestamp" endspan i-checksum="39359" --></i></p>
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2003-10-24 10:51:38 +00:00
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<P><I>Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (See accompanying file <A href="../../../LICENSE_1_0.txt">LICENSE_1_0.txt</A>
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or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)</I></P>
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2003-05-17 11:45:48 +00:00
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2005-01-13 17:06:21 +00:00
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