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<a href="#pub-methods">Public Member Functions</a> |
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<a href="#pro-attribs">Protected Attributes</a> |
<a href="#pri-methods">Private Member Functions</a> </div>
<div class="headertitle">
<h1>InputBuffer Class Reference</h1> </div>
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<div class="contents">
<!-- doxytag: class="InputBuffer" -->
<p><code>#include <<a class="el" href="InputBuffer_8hpp_source.html">InputBuffer.hpp</a>></code></p>
<div class="dynheader">
Inheritance diagram for InputBuffer:</div>
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<div class="center"><img src="classInputBuffer__inherit__graph.png" border="0" usemap="#InputBuffer_inherit__map" alt="Inheritance graph"/></div>
<map name="InputBuffer_inherit__map" id="InputBuffer_inherit__map">
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<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
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Collaboration diagram for InputBuffer:</div>
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<div class="center"><img src="classInputBuffer__coll__graph.png" border="0" usemap="#InputBuffer_coll__map" alt="Collaboration graph"/></div>
<map name="InputBuffer_coll__map" id="InputBuffer_coll__map">
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<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classInputBuffer-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="classInputBuffer.html#a539e007478e6a19dd2c933e2fe6f6b5c">InputBuffer</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#ac8e553cdc4097665450a7b83b797475c">~InputBuffer</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a8775d70258996e18e59b5224ee5b3193">reset</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reset the input buffer to empty state. <a href="#a8775d70258996e18e59b5224ee5b3193"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#aeeb2f071b0846b297e0883988c5b4e30">commit</a> (void)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a7fc02531cd092b4be5db785129357c90">consume</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a529d84e01b12b3b851c33d0879842f33">fill</a> (unsigned int amount)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a330a5238a409a12116cfe83911bf4750">getChar</a> ()=0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a9131f6a5044231af073cb0aeb31668a8">LA</a> (unsigned int i)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#ad09c1b83e1e54db4d650215d576e8305">mark</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a5baaa73c4ac1cc17765918f4b1cc8426">isMarked</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Are there any marks active in the <a class="el" href="classInputBuffer.html">InputBuffer</a>. <a href="#a5baaa73c4ac1cc17765918f4b1cc8426"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#adf033a6872eff022c8af22e5babe10bd">rewind</a> (unsigned int mark)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a392817a08398b49506b4f505502d8fd7">entries</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#aa5e328691557b422727e4d6cc03b012d">getLAChars</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a43499cdeb67e2577185fb7cc3ac7f6d9">getMarkedChars</a> () const </td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a77e530c53e5e18862d06bedf2af94c81">syncConsume</a> ()</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">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a5697a1f8c161d84728169492db14d61b">nMarkers</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a248eb1b09530c9c6aad7566ea80cc0c9">markerOffset</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a8061c7a999bfdc9c68f47f0946bb5ad2">numToConsume</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classCircularQueue.html">CircularQueue</a>< int > </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#ab7f62cafe5cbd85489ed13d994336d60">queue</a></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"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a18a83372940cb989d11be8c3321ca6cd">InputBuffer</a> (const <a class="el" href="classInputBuffer.html">InputBuffer</a> &other)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classInputBuffer.html">InputBuffer</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classInputBuffer.html#a26ed9255b3cd9cc7ceb6281bb8b71ffe">operator=</a> (const <a class="el" href="classInputBuffer.html">InputBuffer</a> &other)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A Stream of characters fed to the lexer from a InputStream that can be rewound via <a class="el" href="classInputBuffer.html#ad09c1b83e1e54db4d650215d576e8305">mark()</a>/rewind() methods. </p>
<p>A dynamic array is used to buffer up all the input characters. Normally, "k" characters are stored in the buffer. More characters may be stored during guess mode (testing syntactic predicate), or when LT(i>k) is referenced. Consumption of characters is deferred. In other words, reading the next character 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.CharQueue </dd></dl>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a539e007478e6a19dd2c933e2fe6f6b5c"></a><!-- doxytag: member="InputBuffer::InputBuffer" ref="a539e007478e6a19dd2c933e2fe6f6b5c" args="()" -->
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<td class="memname">InputBuffer::InputBuffer </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
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<p>Create a character buffer </p>
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<a class="anchor" id="ac8e553cdc4097665450a7b83b797475c"></a><!-- doxytag: member="InputBuffer::~InputBuffer" ref="ac8e553cdc4097665450a7b83b797475c" args="()" -->
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<td class="memname">virtual InputBuffer::~InputBuffer </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline, virtual]</code></td>
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<a class="anchor" id="a18a83372940cb989d11be8c3321ca6cd"></a><!-- doxytag: member="InputBuffer::InputBuffer" ref="a18a83372940cb989d11be8c3321ca6cd" args="(const InputBuffer &other)" -->
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<td class="memname">InputBuffer::InputBuffer </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classInputBuffer.html">InputBuffer</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="aeeb2f071b0846b297e0883988c5b4e30"></a><!-- doxytag: member="InputBuffer::commit" ref="aeeb2f071b0846b297e0883988c5b4e30" args="(void)" -->
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<td class="memname">void InputBuffer::commit </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
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<p>This method updates the state of the input buffer so that the text matched since the most recent <a class="el" href="classInputBuffer.html#ad09c1b83e1e54db4d650215d576e8305">mark()</a> is no longer held by the buffer. So, you either do a mark/rewind for failed predicate or mark/commit to keep on parsing without rewinding the input. </p>
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<a class="anchor" id="a7fc02531cd092b4be5db785129357c90"></a><!-- doxytag: member="InputBuffer::consume" ref="a7fc02531cd092b4be5db785129357c90" args="()" -->
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<td class="memname">virtual void InputBuffer::consume </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline, virtual]</code></td>
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<p>Mark another character for deferred consumption </p>
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<a class="anchor" id="a392817a08398b49506b4f505502d8fd7"></a><!-- doxytag: member="InputBuffer::entries" ref="a392817a08398b49506b4f505502d8fd7" args="() const " -->
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<td class="memname">unsigned int InputBuffer::entries </td>
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<td class="paramname"></td><td>)</td>
<td> const<code> [virtual]</code></td>
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<p>Get the number of non-consumed characters </p>
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<a class="anchor" id="a529d84e01b12b3b851c33d0879842f33"></a><!-- doxytag: member="InputBuffer::fill" ref="a529d84e01b12b3b851c33d0879842f33" args="(unsigned int amount)" -->
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<td class="memname">void InputBuffer::fill </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>amount</em></td><td>)</td>
<td><code> [virtual]</code></td>
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<p>Ensure that the character buffer is sufficiently full </p>
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<a class="anchor" id="a330a5238a409a12116cfe83911bf4750"></a><!-- doxytag: member="InputBuffer::getChar" ref="a330a5238a409a12116cfe83911bf4750" args="()=0" -->
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<td class="memname">virtual int InputBuffer::getChar </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [pure virtual]</code></td>
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<p>Override this in subclasses to get the next character </p>
<p>Implemented in <a class="el" href="classCharBuffer.html#a3038857d07b5646052a20c5e3895ffb2">CharBuffer</a>, and <a class="el" href="classCharInputBuffer.html#a206ad055f6cf530b5df9a479d8ebbad7">CharInputBuffer</a>.</p>
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<a class="anchor" id="aa5e328691557b422727e4d6cc03b012d"></a><!-- doxytag: member="InputBuffer::getLAChars" ref="aa5e328691557b422727e4d6cc03b012d" args="() const " -->
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<td class="memname">std::string InputBuffer::getLAChars </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>get the current lookahead characters as a string </p>
<dl class="warning"><dt><b>Warning:</b></dt><dd>it may treat 0 and EOF values wrong </dd></dl>
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<a class="anchor" id="a43499cdeb67e2577185fb7cc3ac7f6d9"></a><!-- doxytag: member="InputBuffer::getMarkedChars" ref="a43499cdeb67e2577185fb7cc3ac7f6d9" args="() const " -->
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<td class="memname">std::string InputBuffer::getMarkedChars </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>get the current marked characters as a string </p>
<dl class="warning"><dt><b>Warning:</b></dt><dd>it may treat 0 and EOF values wrong </dd></dl>
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<a class="anchor" id="a5baaa73c4ac1cc17765918f4b1cc8426"></a><!-- doxytag: member="InputBuffer::isMarked" ref="a5baaa73c4ac1cc17765918f4b1cc8426" args="() const " -->
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<td class="memname">virtual bool InputBuffer::isMarked </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const<code> [inline, virtual]</code></td>
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<p>Are there any marks active in the <a class="el" href="classInputBuffer.html">InputBuffer</a>. </p>
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<a class="anchor" id="a9131f6a5044231af073cb0aeb31668a8"></a><!-- doxytag: member="InputBuffer::LA" ref="a9131f6a5044231af073cb0aeb31668a8" args="(unsigned int i)" -->
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<td class="memname">virtual int InputBuffer::LA </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>i</em></td><td>)</td>
<td><code> [inline, virtual]</code></td>
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<p>Get a lookahead character </p>
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<a class="anchor" id="ad09c1b83e1e54db4d650215d576e8305"></a><!-- doxytag: member="InputBuffer::mark" ref="ad09c1b83e1e54db4d650215d576e8305" args="()" -->
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<td class="memname">unsigned int InputBuffer::mark </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></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="a26ed9255b3cd9cc7ceb6281bb8b71ffe"></a><!-- doxytag: member="InputBuffer::operator=" ref="a26ed9255b3cd9cc7ceb6281bb8b71ffe" args="(const InputBuffer &other)" -->
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<td class="memname"><a class="el" href="classInputBuffer.html">InputBuffer</a>& InputBuffer::operator= </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classInputBuffer.html">InputBuffer</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td><code> [private]</code></td>
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<a class="anchor" id="a8775d70258996e18e59b5224ee5b3193"></a><!-- doxytag: member="InputBuffer::reset" ref="a8775d70258996e18e59b5224ee5b3193" args="(void)" -->
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<td class="memname">virtual void InputBuffer::reset </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td><code> [inline, virtual]</code></td>
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<p>Reset the input buffer to empty state. </p>
<p>Reimplemented in <a class="el" href="classCharInputBuffer.html#a3d17b07c6261c2fb882c0cc980866424">CharInputBuffer</a>.</p>
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<a class="anchor" id="adf033a6872eff022c8af22e5babe10bd"></a><!-- doxytag: member="InputBuffer::rewind" ref="adf033a6872eff022c8af22e5babe10bd" args="(unsigned int mark)" -->
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<td class="memname">void InputBuffer::rewind </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>mark</em></td><td>)</td>
<td><code> [virtual]</code></td>
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<p>Rewind the character 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="classInputBuffer.html#ad09c1b83e1e54db4d650215d576e8305">mark()</a> </td></tr>
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</dd>
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<a class="anchor" id="a77e530c53e5e18862d06bedf2af94c81"></a><!-- doxytag: member="InputBuffer::syncConsume" ref="a77e530c53e5e18862d06bedf2af94c81" args="()" -->
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<td class="memname">void InputBuffer::syncConsume </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline, protected]</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="a248eb1b09530c9c6aad7566ea80cc0c9"></a><!-- doxytag: member="InputBuffer::markerOffset" ref="a248eb1b09530c9c6aad7566ea80cc0c9" args="" -->
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<td class="memname">unsigned int <a class="el" href="classInputBuffer.html#a248eb1b09530c9c6aad7566ea80cc0c9">InputBuffer::markerOffset</a><code> [protected]</code></td>
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<a class="anchor" id="a5697a1f8c161d84728169492db14d61b"></a><!-- doxytag: member="InputBuffer::nMarkers" ref="a5697a1f8c161d84728169492db14d61b" args="" -->
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<td class="memname">unsigned int <a class="el" href="classInputBuffer.html#a5697a1f8c161d84728169492db14d61b">InputBuffer::nMarkers</a><code> [protected]</code></td>
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<a class="anchor" id="a8061c7a999bfdc9c68f47f0946bb5ad2"></a><!-- doxytag: member="InputBuffer::numToConsume" ref="a8061c7a999bfdc9c68f47f0946bb5ad2" args="" -->
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<td class="memname">unsigned int <a class="el" href="classInputBuffer.html#a8061c7a999bfdc9c68f47f0946bb5ad2">InputBuffer::numToConsume</a><code> [protected]</code></td>
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<a class="anchor" id="ab7f62cafe5cbd85489ed13d994336d60"></a><!-- doxytag: member="InputBuffer::queue" ref="ab7f62cafe5cbd85489ed13d994336d60" args="" -->
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<td class="memname"><a class="el" href="classCircularQueue.html">CircularQueue</a><int> <a class="el" href="classInputBuffer.html#ab7f62cafe5cbd85489ed13d994336d60">InputBuffer::queue</a><code> [protected]</code></td>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>antlr/<a class="el" href="InputBuffer_8hpp_source.html">InputBuffer.hpp</a></li>
<li>src/<a class="el" href="InputBuffer_8cpp.html">InputBuffer.cpp</a></li>
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