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<title>MTParserLib: MTOperatorI Class Reference</title>
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<h1>MTOperatorI Class Reference</h1><!-- doxytag: class="MTOperatorI" --><!-- doxytag: inherits="MTParserItemI" --><code>#include <<a class="el" href="MTParserPublic_8h-source.html">MTParserPublic.h</a>></code>
<p>
<p>Inheritance diagram for MTOperatorI:
<p><center><img src="classMTOperatorI.png" usemap="#MTOperatorI_map" border="0" alt=""></center>
<map name="MTOperatorI_map">
<area href="classMTParserItemI.html" alt="MTParserItemI" shape="rect" coords="0,0,131,24">
<area href="classAddOp.html" alt="AddOp" shape="rect" coords="141,112,272,136">
<area href="classAndOp.html" alt="AndOp" shape="rect" coords="141,168,272,192">
<area href="classDivOp.html" alt="DivOp" shape="rect" coords="141,224,272,248">
<area href="classEqualOp.html" alt="EqualOp" shape="rect" coords="141,280,272,304">
<area href="classExpOp.html" alt="ExpOp" shape="rect" coords="141,336,272,360">
<area href="classGreaterEqualThanOp.html" alt="GreaterEqualThanOp" shape="rect" coords="141,392,272,416">
<area href="classGreaterThanOp.html" alt="GreaterThanOp" shape="rect" coords="141,448,272,472">
<area href="classLesserEqualThanOp.html" alt="LesserEqualThanOp" shape="rect" coords="141,504,272,528">
<area href="classLesserThanOp.html" alt="LesserThanOp" shape="rect" coords="141,560,272,584">
<area href="classMinusOp.html" alt="MinusOp" shape="rect" coords="141,616,272,640">
<area href="classModuloOp.html" alt="ModuloOp" shape="rect" coords="141,672,272,696">
<area href="classMultOp.html" alt="MultOp" shape="rect" coords="141,728,272,752">
<area href="classNotEqualOp.html" alt="NotEqualOp" shape="rect" coords="141,784,272,808">
<area href="classNotOp.html" alt="NotOp" shape="rect" coords="141,840,272,864">
<area href="classOrOp.html" alt="OrOp" shape="rect" coords="141,896,272,920">
<area href="classUnaryAddOp.html" alt="UnaryAddOp" shape="rect" coords="141,952,272,976">
<area href="classUnaryMinusOp.html" alt="UnaryMinusOp" shape="rect" coords="141,1008,272,1032">
</map>
<a href="classMTOperatorI-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Specialized operator evaluator.
<p>
Implement this interface to create a new operator.
<p>
<p>
Definition at line <a class="el" href="MTParserPublic_8h-source.html#l00262">262</a> of file <a class="el" href="MTParserPublic_8h-source.html">MTParserPublic.h</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">virtual <a class="el" href="MTParserPublic_8h.html#a9">EMTOpPrecedence</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classMTOperatorI.html#a0">getPrecedence</a> ()=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the operator precedence. <a href="#a0"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classMTOperatorI.html#a1">isUnaryOp</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Query whether this is an unary operator. <a href="#a1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classMTOperatorI.html">MTOperatorI</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classMTOperatorI.html#a2">spawn</a> ()=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create a new instance of itself. <a href="#a2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classMTOperatorI.html#a3">isConstant</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Indicate whether an item is constant. <a href="#a3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a4"></a><!-- doxytag: member="MTOperatorI::~MTOperatorI" ref="a4" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classMTOperatorI.html#a4">~MTOperatorI</a> ()</td></tr>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a0"></a><!-- doxytag: member="MTOperatorI::getPrecedence" ref="a0" args="()=0" --><p>
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<td class="md" nowrap valign="top">virtual <a class="el" href="MTParserPublic_8h.html#a9">EMTOpPrecedence</a> MTOperatorI::getPrecedence </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
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</td>
<td>
<p>
Return the operator precedence.
<p>
The operator precedence determines the evaluation order of a formula.<p>
<dl compact><dt><b>Returns:</b></dt><dd>The operator precedence</dd></dl>
<p>
Referenced by <a class="el" href="MTParserCompiler_8cpp-source.html#l01046">MTCompilerDefState::onOp()</a>. </td>
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<a class="anchor" name="a3"></a><!-- doxytag: member="MTOperatorI::isConstant" ref="a3" args="()" --><p>
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<td class="md" nowrap valign="top">virtual bool MTOperatorI::isConstant </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline, virtual]</code></td>
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</td>
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</td>
<td>
<p>
Indicate whether an item is constant.
<p>
A constant item can be evaluated only once and its value cached, thus optimizing performance. For example, a constant function always returns the same result when evaluated with the same arguments. An example of non-constant function is the random function.<p>
This method is called after the first evaluation.<p>
<dl compact><dt><b>Returns:</b></dt><dd>True if the item is constant</dd></dl>
<p>
Implements <a class="el" href="classMTParserItemI.html#a4">MTParserItemI</a>.
<p>
Definition at line <a class="el" href="MTParserPublic_8h-source.html#l00297">297</a> of file <a class="el" href="MTParserPublic_8h-source.html">MTParserPublic.h</a>. </td>
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<a class="anchor" name="a1"></a><!-- doxytag: member="MTOperatorI::isUnaryOp" ref="a1" args="()" --><p>
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<td class="md" nowrap valign="top">virtual bool MTOperatorI::isUnaryOp </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline, virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
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<td>
</td>
<td>
<p>
Query whether this is an unary operator.
<p>
An unary operator takes only a right argument. For example, the unary minus operator: -x. Most operators are binary like: x+y.<p>
<dl compact><dt><b>Returns:</b></dt><dd>Return true if this operator is a unary operator</dd></dl>
<p>
Definition at line <a class="el" href="MTParserPublic_8h-source.html#l00282">282</a> of file <a class="el" href="MTParserPublic_8h-source.html">MTParserPublic.h</a>.
<p>
Referenced by <a class="el" href="MTParserRegistrar_8cpp-source.html#l00424">MTParserRegistrar::undefineOp()</a>. </td>
</tr>
</table>
<a class="anchor" name="a2"></a><!-- doxytag: member="MTOperatorI::spawn" ref="a2" args="()=0" --><p>
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<td class="md" nowrap valign="top">virtual <a class="el" href="classMTOperatorI.html">MTOperatorI</a>* MTOperatorI::spawn </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
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</td>
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</td>
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<p>
Create a new instance of itself.
<p>
This method is used to duplicate a parser object.<p>
<dl compact><dt><b>Returns:</b></dt><dd>A new independant object representing the same operator</dd></dl>
</td>
</tr>
</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="MTParserPublic_8h-source.html">MTParserPublic.h</a></ul>
<hr size="1"><address style="align: right;"><small>Generated on Sun Mar 9 17:39:37 2008 for MTParserLib by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.4 </small></address>
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