boost_regex/doc/bad_expression.html

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               <h1 align="center">Boost.Regex</h1>
               <h2 align="center">class bad_expression</h2>
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      <h3>Synopsis</h3>
      <p>#include &lt;<a href="../../boost/regex/pattern_except.hpp">boost/pattern_except.hpp</a>&gt;</p>
      <p>The class <code>bad_expression</code> defines the type of objects thrown as 
         exceptions to report errors during the conversion from a string representing a 
         regular expression to a finite state machine.&nbsp;&nbsp;</p>
      <pre>
<b>namespace</b> boost{

<b>class</b> bad_pattern : <b>public</b> std::runtime_error
{
<b>public</b>:
   <b>explicit</b> bad_pattern(<b>const</b> std::string&amp; s) : std::runtime_error(s){};
};

<b>class</b> bad_expression : <b>public</b> bad_pattern
{
<b>public</b>:
   bad_expression(<b>const</b> std::string&amp; s) : bad_pattern(s) {}
};


} // namespace boost
</pre>
      <h3>Description</h3>
      <pre>
bad_expression(const string&amp; what_arg);
</pre>
      <p><b>Effects:</b> Constructs an object of class <code>bad_expression</code>.</p>
      <b></b>
      <p><b>Postcondition:</b> <code>strcmp(what(), what_arg.c_str()) == 0</code>.</p>
      <p>Footnotes: the class <i>bad_pattern</i> forms the base class for all 
         pattern-matching exceptions, of which <i>bad_expression</i> is one. The choice 
         of <i>std::runtime_error</i> as the base class for <i>bad_pattern</i> is moot; 
         depending upon how the library is used exceptions may be either logic errors 
         (programmer supplied expressions) or run time errors (user supplied 
         expressions).</p>
      <p></p>
      <hr>
      <p>Revised 
         <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
         17 May 2003 
         <!--webbot bot="Timestamp" endspan i-checksum="39359" --></p>
      <p><i>© Copyright <a href="mailto:jm@regex.fsnet.co.uk">John Maddock</a>&nbsp;1998- 
            <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%Y" startspan -->
            2003 
            <!--webbot bot="Timestamp" endspan i-checksum="39359" --></i></p>
      <p align="left"><i>Permission to use, copy, modify, distribute and sell this software 
            and its documentation for any purpose is hereby granted without fee, provided 
            that the above copyright notice appear in all copies and that both that 
            copyright notice and this permission notice appear in supporting documentation. 
            Dr John Maddock makes no representations about the suitability of this software 
            for any purpose. It is provided "as is" without express or implied warranty.</i></p>
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