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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>Xapian: API Documentation: xapian-core: Xapian::ValueRangeProcessor Struct Reference</title>
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<div class="navpath"><a class="el" href="namespaceXapian.html">Xapian</a>::<a class="el" href="structXapian_1_1ValueRangeProcessor.html">ValueRangeProcessor</a>
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<h1>Xapian::ValueRangeProcessor Struct Reference</h1><!-- doxytag: class="Xapian::ValueRangeProcessor" -->Base class for value range processors.
<a href="#_details">More...</a>
<p>
<div class="dynheader">
Inheritance diagram for Xapian::ValueRangeProcessor:</div>
<div class="dynsection">
<p><center><img src="structXapian_1_1ValueRangeProcessor__inherit__graph.png" border="0" usemap="#Xapian_1_1ValueRangeProcessor__inherit__map" alt="Inheritance graph"></center>
<map name="Xapian_1_1ValueRangeProcessor__inherit__map">
<area shape="rect" href="classXapian_1_1StringValueRangeProcessor.html" title="Handle a string range." alt="" coords="139,84,387,111"><area shape="rect" href="classXapian_1_1DateValueRangeProcessor.html" title="Handle a date range." alt="" coords="5,161,245,188"><area shape="rect" href="classXapian_1_1NumberValueRangeProcessor.html" title="Handle a number range." alt="" coords="269,161,531,188"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
<p>
<a href="structXapian_1_1ValueRangeProcessor-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b32baad9238adb002b47f99ec362e56e"></a><!-- doxytag: member="Xapian::ValueRangeProcessor::~ValueRangeProcessor" ref="b32baad9238adb002b47f99ec362e56e" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="structXapian_1_1ValueRangeProcessor.html#b32baad9238adb002b47f99ec362e56e">~ValueRangeProcessor</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structXapian_1_1ValueRangeProcessor.html#a04e11c41e40ceed5f796c94348d2ad2">operator()</a> (std::string &begin, std::string &end)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check for a valid range of this type. <a href="#a04e11c41e40ceed5f796c94348d2ad2"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Base class for value range processors. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a04e11c41e40ceed5f796c94348d2ad2"></a><!-- doxytag: member="Xapian::ValueRangeProcessor::operator()" ref="a04e11c41e40ceed5f796c94348d2ad2" args="(std::string &begin, std::string &end)=0" -->
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<td class="memname">virtual <a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> Xapian::ValueRangeProcessor::operator() </td>
<td>(</td>
<td class="paramtype">std::string & </td>
<td class="paramname"> <em>begin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">std::string & </td>
<td class="paramname"> <em>end</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [pure virtual]</code></td>
</tr>
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<p>
Check for a valid range of this type.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in,out]</tt> </td><td valign="top"><em>begin</em> </td><td>The start of the range as specified in the query string by the user. This parameter is a non-const reference so the <a class="el" href="structXapian_1_1ValueRangeProcessor.html" title="Base class for value range processors.">ValueRangeProcessor</a> can modify it to return the value to start the range with. </td></tr>
<tr><td valign="top"><tt>[in,out]</tt> </td><td valign="top"><em>end</em> </td><td>The end of the range. This is also a non-const reference so it can be modified.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>If this <a class="el" href="structXapian_1_1ValueRangeProcessor.html" title="Base class for value range processors.">ValueRangeProcessor</a> recognises the range BEGIN..END it returns the value slot number to range filter on. Otherwise it returns <a class="el" href="namespaceXapian.html#0a75ef120e641c77f703e60f595ffda2" title="Reserved value to indicate "no valueno".">Xapian::BAD_VALUENO</a>. </dd></dl>
<p>Implemented in <a class="el" href="classXapian_1_1StringValueRangeProcessor.html#ac2cd6bf4645a3bb242cf5ad5022ae5e">Xapian::StringValueRangeProcessor</a>, <a class="el" href="classXapian_1_1DateValueRangeProcessor.html#29c079d9156a872f38fca82195525a92">Xapian::DateValueRangeProcessor</a>, and <a class="el" href="classXapian_1_1NumberValueRangeProcessor.html#4a0951e57a4ea8fcdcd9bec6a8037514">Xapian::NumberValueRangeProcessor</a>.</p>
</div>
</div><p>
<hr>The documentation for this struct was generated from the following file:<ul>
<li>xapian/<a class="el" href="queryparser_8h.html">queryparser.h</a></ul>
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Documentation for Xapian (version 1.2.12).<br>
Generated on 27 Jun 2012 by
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