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<h1>TokenBuffer Class Reference</h1> </div>
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<!-- doxytag: class="TokenBuffer" -->
<p><code>#include <<a class="el" href="TokenBuffer_8hpp_source.html">TokenBuffer.hpp</a>></code></p>
<div class="dynheader">
Collaboration diagram for TokenBuffer:</div>
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<div class="center"><img src="classTokenBuffer__coll__graph.png" border="0" usemap="#TokenBuffer_coll__map" alt="Collaboration graph"/></div>
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<p><a href="classTokenBuffer-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#abb9dc2018056d3c68c63b441405504e7">TokenBuffer</a> (<a class="el" href="classTokenStream.html">TokenStream</a> &input_)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a569be7c48bb3336e2252d922048ac232">~TokenBuffer</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a9eac55ad444531a34a6de112b3e966e2">reset</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reset the input buffer to empty state. <a href="#a9eac55ad444531a34a6de112b3e966e2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a506ec73baa84375afca4ccbabc6a366b">LA</a> (unsigned int i)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classTokenRefCount.html">RefToken</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#ab25cdad02145d51bbfe35220995d149b">LT</a> (unsigned int i)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#aec5dcbf962fb1b695a11413675e33c09">mark</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#ad809ea0d3f014795d6ab1f109bf87d1d">rewind</a> (unsigned int mark)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a1608b77ba5671fe96428523620e62a33">consume</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#aa54c39954972b29cddedf70bbfd47f88">entries</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the number of entries in the <a class="el" href="classTokenBuffer.html">TokenBuffer</a>. <a href="#aa54c39954972b29cddedf70bbfd47f88"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classTokenStream.html">TokenStream</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#ab64546a189551b2bfdb7d44ce9f10613">input</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="classToken.html">Token</a> source. <a href="#ab64546a189551b2bfdb7d44ce9f10613"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#abf3c969f4554b377d07cb328b5a3e6df">nMarkers</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Number of active markers. <a href="#abf3c969f4554b377d07cb328b5a3e6df"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#aa2348bea0cea1ee61abe87ded1794685">markerOffset</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Additional offset used when markers are active. <a href="#aa2348bea0cea1ee61abe87ded1794685"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#ae2ec979dbe4ef1a39f65d7142bc333ca">numToConsume</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Number of calls to <a class="el" href="classTokenBuffer.html#a1608b77ba5671fe96428523620e62a33">consume()</a> since last <a class="el" href="classTokenBuffer.html#a506ec73baa84375afca4ccbabc6a366b">LA()</a> or <a class="el" href="classTokenBuffer.html#ab25cdad02145d51bbfe35220995d149b">LT()</a> call. <a href="#ae2ec979dbe4ef1a39f65d7142bc333ca"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classCircularQueue.html">CircularQueue</a>< <a class="el" href="classTokenRefCount.html">RefToken</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#acd4cf4d1b81f1e1a2479da306788121e">queue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Circular queue with Tokens. <a href="#acd4cf4d1b81f1e1a2479da306788121e"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="pri-methods"></a>
Private Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a18f8c1334d239553cb81958ff93b33aa">fill</a> (unsigned int amount)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a9427fa1eeaa8beedcd63b156d283b969">syncConsume</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#ae8953b1ebeec2152ec9638fe3048fba8">TokenBuffer</a> (const <a class="el" href="classTokenBuffer.html">TokenBuffer</a> &other)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classTokenBuffer.html">TokenBuffer</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classTokenBuffer.html#a9590ed753e3683f3bff50f4d84015b3c">operator=</a> (const <a class="el" href="classTokenBuffer.html">TokenBuffer</a> &other)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A Stream of <a class="el" href="classToken.html">Token</a> objects fed to the parser from a <a class="el" href="classTokenStream.html">TokenStream</a> that can be rewound via <a class="el" href="classTokenBuffer.html#aec5dcbf962fb1b695a11413675e33c09">mark()</a>/rewind() methods. </p>
<p>A dynamic array is used to buffer up all the input tokens. Normally, "k" tokens are stored in the buffer. More tokens may be stored during guess mode (testing syntactic predicate), or when LT(i>k) is referenced. Consumption of tokens is deferred. In other words, reading the next token is not done by conume(), but deferred until needed by LA or LT. </p>
<dl class="todo"><dt><b><a class="el" href="todo.html#_todo000006">Todo:</a></b></dt><dd>: see if we can integrate this one with <a class="el" href="classInputBuffer.html">InputBuffer</a> into one template or so.</dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd>antlr.Token </dd>
<dd>
antlr.TokenStream </dd>
<dd>
antlr.TokenQueue </dd></dl>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="abb9dc2018056d3c68c63b441405504e7"></a><!-- doxytag: member="TokenBuffer::TokenBuffer" ref="abb9dc2018056d3c68c63b441405504e7" args="(TokenStream &input_)" -->
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<td class="memname">TokenBuffer::TokenBuffer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classTokenStream.html">TokenStream</a> & </td>
<td class="paramname"><em>inp</em></td><td>)</td>
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<p>Create a token buffer</p>
<p>A Stream of <a class="el" href="classToken.html">Token</a> objects fed to the parser from a <a class="el" href="classTokenStream.html">TokenStream</a> that can be rewound via <a class="el" href="classTokenBuffer.html#aec5dcbf962fb1b695a11413675e33c09">mark()</a>/rewind() methods. </p>
<p>A dynamic array is used to buffer up all the input tokens. Normally, "k" tokens are stored in the buffer. More tokens may be stored during guess mode (testing syntactic predicate), or when LT(i>k) is referenced. Consumption of tokens is deferred. In other words, reading the next token is not done by conume(), but deferred until needed by LA or LT. </p>
<dl class="see"><dt><b>See also:</b></dt><dd>antlr.Token </dd>
<dd>
antlr.TokenStream </dd>
<dd>
antlr.TokenQueue Create a token buffer </dd></dl>
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<a class="anchor" id="a569be7c48bb3336e2252d922048ac232"></a><!-- doxytag: member="TokenBuffer::~TokenBuffer" ref="a569be7c48bb3336e2252d922048ac232" args="()" -->
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<td class="memname">TokenBuffer::~TokenBuffer </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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<a class="anchor" id="ae8953b1ebeec2152ec9638fe3048fba8"></a><!-- doxytag: member="TokenBuffer::TokenBuffer" ref="ae8953b1ebeec2152ec9638fe3048fba8" args="(const TokenBuffer &other)" -->
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<td class="memname">TokenBuffer::TokenBuffer </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classTokenBuffer.html">TokenBuffer</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td><code> [private]</code></td>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a1608b77ba5671fe96428523620e62a33"></a><!-- doxytag: member="TokenBuffer::consume" ref="a1608b77ba5671fe96428523620e62a33" args="()" -->
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<td class="memname">void TokenBuffer::consume </td>
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<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
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<p>Mark another token for deferred consumption </p>
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<a class="anchor" id="aa54c39954972b29cddedf70bbfd47f88"></a><!-- doxytag: member="TokenBuffer::entries" ref="aa54c39954972b29cddedf70bbfd47f88" args="() const " -->
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<td class="memname">unsigned int TokenBuffer::entries </td>
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<td> const<code> [virtual]</code></td>
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<p>Return the number of entries in the <a class="el" href="classTokenBuffer.html">TokenBuffer</a>. </p>
<p>Get number of non-consumed tokens. </p>
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<a class="anchor" id="a18f8c1334d239553cb81958ff93b33aa"></a><!-- doxytag: member="TokenBuffer::fill" ref="a18f8c1334d239553cb81958ff93b33aa" args="(unsigned int amount)" -->
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<td class="memname">void TokenBuffer::fill </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>amount</em></td><td>)</td>
<td><code> [private]</code></td>
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<p>Ensure that the token buffer is sufficiently full </p>
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<a class="anchor" id="a506ec73baa84375afca4ccbabc6a366b"></a><!-- doxytag: member="TokenBuffer::LA" ref="a506ec73baa84375afca4ccbabc6a366b" args="(unsigned int i)" -->
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<td class="memname">int TokenBuffer::LA </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>i</em></td><td>)</td>
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<p>Get a lookahead token value </p>
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<a class="anchor" id="ab25cdad02145d51bbfe35220995d149b"></a><!-- doxytag: member="TokenBuffer::LT" ref="ab25cdad02145d51bbfe35220995d149b" args="(unsigned int i)" -->
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<td class="memname"><a class="el" href="classTokenRefCount.html">RefToken</a> TokenBuffer::LT </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>i</em></td><td>)</td>
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<p>Get a lookahead token </p>
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<a class="anchor" id="aec5dcbf962fb1b695a11413675e33c09"></a><!-- doxytag: member="TokenBuffer::mark" ref="aec5dcbf962fb1b695a11413675e33c09" args="()" -->
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<td class="memname">unsigned int TokenBuffer::mark </td>
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<p>Return an integer marker that can be used to rewind the buffer to its current state. </p>
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<a class="anchor" id="a9590ed753e3683f3bff50f4d84015b3c"></a><!-- doxytag: member="TokenBuffer::operator=" ref="a9590ed753e3683f3bff50f4d84015b3c" args="(const TokenBuffer &other)" -->
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<td class="memname">const <a class="el" href="classTokenBuffer.html">TokenBuffer</a>& TokenBuffer::operator= </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classTokenBuffer.html">TokenBuffer</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td><code> [private]</code></td>
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<a class="anchor" id="a9eac55ad444531a34a6de112b3e966e2"></a><!-- doxytag: member="TokenBuffer::reset" ref="a9eac55ad444531a34a6de112b3e966e2" args="(void)" -->
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<td class="memname">void TokenBuffer::reset </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
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<p>Reset the input buffer to empty state. </p>
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<a class="anchor" id="ad809ea0d3f014795d6ab1f109bf87d1d"></a><!-- doxytag: member="TokenBuffer::rewind" ref="ad809ea0d3f014795d6ab1f109bf87d1d" args="(unsigned int mark)" -->
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<td class="memname">void TokenBuffer::rewind </td>
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<p>Rewind the token buffer to a marker. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">mark</td><td>Marker returned previously from <a class="el" href="classTokenBuffer.html#aec5dcbf962fb1b695a11413675e33c09">mark()</a> </td></tr>
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<a class="anchor" id="a9427fa1eeaa8beedcd63b156d283b969"></a><!-- doxytag: member="TokenBuffer::syncConsume" ref="a9427fa1eeaa8beedcd63b156d283b969" args="()" -->
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<td class="memname">void TokenBuffer::syncConsume </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline, private]</code></td>
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<p>Sync up deferred consumption </p>
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<hr/><h2>Member Data Documentation</h2>
<a class="anchor" id="ab64546a189551b2bfdb7d44ce9f10613"></a><!-- doxytag: member="TokenBuffer::input" ref="ab64546a189551b2bfdb7d44ce9f10613" args="" -->
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<td class="memname"><a class="el" href="classTokenStream.html">TokenStream</a>& <a class="el" href="classTokenBuffer.html#ab64546a189551b2bfdb7d44ce9f10613">TokenBuffer::input</a><code> [protected]</code></td>
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<p><a class="el" href="classToken.html">Token</a> source. </p>
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<a class="anchor" id="aa2348bea0cea1ee61abe87ded1794685"></a><!-- doxytag: member="TokenBuffer::markerOffset" ref="aa2348bea0cea1ee61abe87ded1794685" args="" -->
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<td class="memname">unsigned int <a class="el" href="classTokenBuffer.html#aa2348bea0cea1ee61abe87ded1794685">TokenBuffer::markerOffset</a><code> [protected]</code></td>
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<p>Additional offset used when markers are active. </p>
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<a class="anchor" id="abf3c969f4554b377d07cb328b5a3e6df"></a><!-- doxytag: member="TokenBuffer::nMarkers" ref="abf3c969f4554b377d07cb328b5a3e6df" args="" -->
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<td class="memname">unsigned int <a class="el" href="classTokenBuffer.html#abf3c969f4554b377d07cb328b5a3e6df">TokenBuffer::nMarkers</a><code> [protected]</code></td>
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<p>Number of active markers. </p>
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<a class="anchor" id="ae2ec979dbe4ef1a39f65d7142bc333ca"></a><!-- doxytag: member="TokenBuffer::numToConsume" ref="ae2ec979dbe4ef1a39f65d7142bc333ca" args="" -->
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<td class="memname">unsigned int <a class="el" href="classTokenBuffer.html#ae2ec979dbe4ef1a39f65d7142bc333ca">TokenBuffer::numToConsume</a><code> [protected]</code></td>
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<p>Number of calls to <a class="el" href="classTokenBuffer.html#a1608b77ba5671fe96428523620e62a33">consume()</a> since last <a class="el" href="classTokenBuffer.html#a506ec73baa84375afca4ccbabc6a366b">LA()</a> or <a class="el" href="classTokenBuffer.html#ab25cdad02145d51bbfe35220995d149b">LT()</a> call. </p>
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<a class="anchor" id="acd4cf4d1b81f1e1a2479da306788121e"></a><!-- doxytag: member="TokenBuffer::queue" ref="acd4cf4d1b81f1e1a2479da306788121e" args="" -->
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<td class="memname"><a class="el" href="classCircularQueue.html">CircularQueue</a><<a class="el" href="classTokenRefCount.html">RefToken</a>> <a class="el" href="classTokenBuffer.html#acd4cf4d1b81f1e1a2479da306788121e">TokenBuffer::queue</a><code> [protected]</code></td>
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<p>Circular queue with Tokens. </p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>antlr/<a class="el" href="TokenBuffer_8hpp_source.html">TokenBuffer.hpp</a></li>
<li>src/<a class="el" href="TokenBuffer_8cpp.html">TokenBuffer.cpp</a></li>
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