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<p>Hides implementation issues associated with obtaining a TokenStream for use with the higlighter - can obtain from TermFreqVectors with offsets and (optionally) positions or from Analyzer class reparsing the stored content.
<a href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#details">More...</a></p>
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Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources_1_1_stored_token_stream.html">StoredTokenStream</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a1ddd5210a9ba3c62890187a65532ab67"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#a1ddd5210a9ba3c62890187a65532ab67">GetAnyTokenStream</a> (<a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a> reader, int docId, String field, <a class="el" href="class_lucene_1_1_net_1_1_documents_1_1_document.html">Document</a> doc, <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a> analyzer)</td></tr>
<tr class="memdesc:a1ddd5210a9ba3c62890187a65532ab67"><td class="mdescLeft">&#160;</td><td class="mdescRight">A convenience method that tries to first get a TermPositionVector for the specified docId, then, falls back to using the passed in <a class="el" href="_searcher_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">org.apache.lucene.document.Document</a> to retrieve the TokenStream. This is useful when you already have the document, but would prefer to use the vector first. <a href="#a1ddd5210a9ba3c62890187a65532ab67"></a><br/></td></tr>
<tr class="separator:a1ddd5210a9ba3c62890187a65532ab67"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad23a6d9a669e4fcf8a312fc805326d36"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#ad23a6d9a669e4fcf8a312fc805326d36">GetAnyTokenStream</a> (<a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a> reader, int docId, String field, <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a> analyzer)</td></tr>
<tr class="memdesc:ad23a6d9a669e4fcf8a312fc805326d36"><td class="mdescLeft">&#160;</td><td class="mdescRight">A convenience method that tries a number of approaches to getting a token stream. The cost of finding there are no termVectors in the index is minimal (1000 invocations still registers 0 ms). So this "lazy" (flexible?) approach to coding is probably acceptable <a href="#ad23a6d9a669e4fcf8a312fc805326d36"></a><br/></td></tr>
<tr class="separator:ad23a6d9a669e4fcf8a312fc805326d36"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2b49326ca7301a888db5b696b3bd9ff9"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#a2b49326ca7301a888db5b696b3bd9ff9">GetTokenStream</a> (<a class="el" href="interface_lucene_1_1_net_1_1_index_1_1_term_position_vector.html">TermPositionVector</a> tpv)</td></tr>
<tr class="separator:a2b49326ca7301a888db5b696b3bd9ff9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a77e1ffdfd6fbaa619f69a9a6a3eaecdc"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#a77e1ffdfd6fbaa619f69a9a6a3eaecdc">GetTokenStream</a> (<a class="el" href="interface_lucene_1_1_net_1_1_index_1_1_term_position_vector.html">TermPositionVector</a> tpv, bool tokenPositionsGuaranteedContiguous)</td></tr>
<tr class="memdesc:a77e1ffdfd6fbaa619f69a9a6a3eaecdc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Low level api. Returns a token stream or null if no offset info available in index. This can be used to feed the highlighter with a pre-parsed token stream <a href="#a77e1ffdfd6fbaa619f69a9a6a3eaecdc"></a><br/></td></tr>
<tr class="separator:a77e1ffdfd6fbaa619f69a9a6a3eaecdc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aca08f3b1f6029695716d9a33c0ba8903"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#aca08f3b1f6029695716d9a33c0ba8903">GetTokenStream</a> (<a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a> reader, int docId, System.String field)</td></tr>
<tr class="separator:aca08f3b1f6029695716d9a33c0ba8903"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab7f36fbbbc70b9a9d8ffaa78552a1c42"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#ab7f36fbbbc70b9a9d8ffaa78552a1c42">GetTokenStream</a> (<a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a> reader, int docId, String field, <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a> analyzer)</td></tr>
<tr class="separator:ab7f36fbbbc70b9a9d8ffaa78552a1c42"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a356b40956ea4a7bdec0a96f156b8a84c"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#a356b40956ea4a7bdec0a96f156b8a84c">GetTokenStream</a> (<a class="el" href="class_lucene_1_1_net_1_1_documents_1_1_document.html">Document</a> doc, String field, <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a> analyzer)</td></tr>
<tr class="separator:a356b40956ea4a7bdec0a96f156b8a84c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad91941c8a0bb901e71b032ae8de2c420"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_lucene_1_1_net_1_1_search_1_1_highlight_1_1_token_sources.html#ad91941c8a0bb901e71b032ae8de2c420">GetTokenStream</a> (String field, String contents, <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a> analyzer)</td></tr>
<tr class="separator:ad91941c8a0bb901e71b032ae8de2c420"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Hides implementation issues associated with obtaining a TokenStream for use with the higlighter - can obtain from TermFreqVectors with offsets and (optionally) positions or from Analyzer class reparsing the stored content. </p>
<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00038">38</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="a1ddd5210a9ba3c62890187a65532ab67"></a>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetAnyTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a>&#160;</td>
<td class="paramname"><em>reader</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>docId</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">String&#160;</td>
<td class="paramname"><em>field</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_documents_1_1_document.html">Document</a>&#160;</td>
<td class="paramname"><em>doc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a>&#160;</td>
<td class="paramname"><em>analyzer</em>&#160;</td>
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<td>)</td>
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<p>A convenience method that tries to first get a TermPositionVector for the specified docId, then, falls back to using the passed in <a class="el" href="_searcher_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">org.apache.lucene.document.Document</a> to retrieve the TokenStream. This is useful when you already have the document, but would prefer to use the vector first. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">reader</td><td>The <a class="el" href="_reader_util_8cs.html#a2a6914ea10bbe06764856e29e5674e66">IndexReader</a> to use to try and get the vector from</td></tr>
<tr><td class="paramname">docId</td><td>The docId to retrieve.</td></tr>
<tr><td class="paramname">field</td><td>The field to retrieve on the document</td></tr>
<tr><td class="paramname">doc</td><td>The document to fall back on</td></tr>
<tr><td class="paramname">analyzer</td><td>The analyzer to use for creating the TokenStream if the vector doesn't exist</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The <a class="el" href="_attribute_source_8cs.html#a205730fc8c2839cf92051d131140dae0">TokenStream</a> for the IFieldable on the <a class="el" href="_searcher_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">Document</a></dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">IOException</td><td>if there was an error loading</td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00085">85</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetAnyTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a>&#160;</td>
<td class="paramname"><em>reader</em>, </td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>docId</em>, </td>
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<td></td>
<td class="paramtype">String&#160;</td>
<td class="paramname"><em>field</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a>&#160;</td>
<td class="paramname"><em>analyzer</em>&#160;</td>
</tr>
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<td>)</td>
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<p>A convenience method that tries a number of approaches to getting a token stream. The cost of finding there are no termVectors in the index is minimal (1000 invocations still registers 0 ms). So this "lazy" (flexible?) approach to coding is probably acceptable </p>
<dl class="section return"><dt>Returns</dt><dd>null if field not stored correctly</dd></dl>
<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00109">109</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="interface_lucene_1_1_net_1_1_index_1_1_term_position_vector.html">TermPositionVector</a>&#160;</td>
<td class="paramname"><em>tpv</em></td><td>)</td>
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<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00126">126</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="interface_lucene_1_1_net_1_1_index_1_1_term_position_vector.html">TermPositionVector</a>&#160;</td>
<td class="paramname"><em>tpv</em>, </td>
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<td class="paramtype">bool&#160;</td>
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<td>)</td>
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<p>Low level api. Returns a token stream or null if no offset info available in index. This can be used to feed the highlighter with a pre-parsed token stream </p>
<p>In my tests the speeds to recreate 1000 token streams using this method are:</p>
<ul>
<li>with TermVector offset only data stored - 420 milliseconds</li>
<li>with TermVector offset AND position data stored - 271 milliseconds (nb timings for TermVector with position data are based on a tokenizer with contiguous positions - no overlaps or gaps) The cost of not using TermPositionVector to store pre-parsed content and using an analyzer to re-parse the original content:</li>
<li>reanalyzing the original content - 980 milliseconds</li>
</ul>
<p>The re-analyze timings will typically vary depending on - 1) The complexity of the analyzer code (timings above were using a stemmer/lowercaser/stopword combo) 2) The number of other fields (<a class="el" href="namespace_lucene.html">Lucene</a> reads ALL fields off the disk when accessing just one document field - can cost dear!) 3) Use of compression on field storage - could be faster due to compression (less disk IO) or slower (more CPU burn) depending on the content. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">tpv</td><td><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">tokenPositionsGuaranteedContiguous</td><td>true if the token position numbers have no overlaps or gaps. If looking to eek out the last drops of performance, set to true. If in doubt, set to false.</td></tr>
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</dd>
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</dl>
<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00157">157</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a>&#160;</td>
<td class="paramname"><em>reader</em>, </td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>docId</em>, </td>
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<td class="paramtype">System.String&#160;</td>
<td class="paramname"><em>field</em>&#160;</td>
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<td>)</td>
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<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00227">227</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html">IndexReader</a>&#160;</td>
<td class="paramname"><em>reader</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>docId</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">String&#160;</td>
<td class="paramname"><em>field</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a>&#160;</td>
<td class="paramname"><em>analyzer</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00245">245</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_documents_1_1_document.html">Document</a>&#160;</td>
<td class="paramname"><em>doc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
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<td class="paramtype">String&#160;</td>
<td class="paramname"><em>field</em>, </td>
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<tr>
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<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a>&#160;</td>
<td class="paramname"><em>analyzer</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00251">251</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
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<td class="memname">static <a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html">TokenStream</a> Lucene.Net.Search.Highlight.TokenSources.GetTokenStream </td>
<td>(</td>
<td class="paramtype">String&#160;</td>
<td class="paramname"><em>field</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">String&#160;</td>
<td class="paramname"><em>contents</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html">Analyzer</a>&#160;</td>
<td class="paramname"><em>analyzer</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Definition at line <a class="el" href="_token_sources_8cs_source.html#l00262">262</a> of file <a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>contrib/Highlighter/<a class="el" href="_token_sources_8cs_source.html">TokenSources.cs</a></li>
</ul>
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