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<title>libqalculate-0.9.6: DynamicVariable Class Reference</title>
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<h1>DynamicVariable Class Reference</h1><!-- doxytag: class=<DynamicVariable> --><!-- doxytag: inherits=<KnownVariable> -->Abstract base class for variables with a value which is recalculated when the precision has changed.
<a href="#_details">More...</a>
<p>
<code>#include <Variable.h></code>
<p>
<p>Inheritance diagram for DynamicVariable:
<p><center><img src="classDynamicVariable.png" usemap="#DynamicVariable_map" border="0" alt=""></center>
<map name="DynamicVariable_map">
<area href="classKnownVariable.html" alt="KnownVariable" shape="rect" coords="0,112,109,136">
<area href="classVariable.html" alt="Variable" shape="rect" coords="0,56,109,80">
<area href="classExpressionItem.html" alt="ExpressionItem" shape="rect" coords="0,0,109,24">
</map>
<a href="classDynamicVariable-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="a0"></a><!-- doxytag: member=<DynamicVariable::DynamicVariable> ref=<a0> args=<(string cat_, string name_, string title_="", bool is_local=false, bool is_builtin=true, bool is_active=true)> -->
</td><td class="memItemRight" valign="bottom"><b>DynamicVariable</b> (string cat_, string name_, string title_="", bool is_local=false, bool is_builtin=true, bool is_active=true)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a1"></a><!-- doxytag: member=<DynamicVariable::DynamicVariable> ref=<a1> args=<(const DynamicVariable *variable)> -->
</td><td class="memItemRight" valign="bottom"><b>DynamicVariable</b> (const <a class="el" href="classDynamicVariable.html">DynamicVariable</a> *variable)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a4"></a><!-- doxytag: member=<DynamicVariable::copy> ref=<a4> args=<() const =0> -->
<a class="el" href="classExpressionItem.html">ExpressionItem</a> * </td><td class="memItemRight" valign="bottom"><b>copy</b> () const =0</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a5"></a><!-- doxytag: member=<DynamicVariable::set> ref=<a5> args=<(const ExpressionItem *item)> -->
void </td><td class="memItemRight" valign="bottom"><b>set</b> (const <a class="el" href="classExpressionItem.html">ExpressionItem</a> *item)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const <a class="el" href="classMathStructure.html">MathStructure</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html#a6">get</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html#a7">set</a> (const <a class="el" href="classMathStructure.html">MathStructure</a> &o)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html#a8">set</a> (string expression_)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html#a9">calculatedPrecision</a> () const </td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html#a10">representsPositive</a> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a11"></a><!-- doxytag: member=<DynamicVariable::representsNegative> ref=<a11> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNegative</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a12"></a><!-- doxytag: member=<DynamicVariable::representsNonNegative> ref=<a12> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNonNegative</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a13"></a><!-- doxytag: member=<DynamicVariable::representsNonPositive> ref=<a13> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNonPositive</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a14"></a><!-- doxytag: member=<DynamicVariable::representsInteger> ref=<a14> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsInteger</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a15"></a><!-- doxytag: member=<DynamicVariable::representsNumber> ref=<a15> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNumber</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a16"></a><!-- doxytag: member=<DynamicVariable::representsRational> ref=<a16> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsRational</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a17"></a><!-- doxytag: member=<DynamicVariable::representsReal> ref=<a17> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsReal</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a18"></a><!-- doxytag: member=<DynamicVariable::representsComplex> ref=<a18> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsComplex</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a19"></a><!-- doxytag: member=<DynamicVariable::representsNonZero> ref=<a19> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNonZero</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a20"></a><!-- doxytag: member=<DynamicVariable::representsEven> ref=<a20> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsEven</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a21"></a><!-- doxytag: member=<DynamicVariable::representsOdd> ref=<a21> args=<(bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsOdd</b> (bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a22"></a><!-- doxytag: member=<DynamicVariable::representsUndefined> ref=<a22> args=<(bool=false, bool=false, bool=false)> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsUndefined</b> (bool=false, bool=false, bool=false)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a23"></a><!-- doxytag: member=<DynamicVariable::representsBoolean> ref=<a23> args=<()> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsBoolean</b> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a24"></a><!-- doxytag: member=<DynamicVariable::representsNonMatrix> ref=<a24> args=<()> -->
virtual bool </td><td class="memItemRight" valign="bottom"><b>representsNonMatrix</b> ()</td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b0"></a><!-- doxytag: member=<DynamicVariable::calculate> ref=<b0> args=<() const =0> -->
virtual void </td><td class="memItemRight" valign="bottom"><b>calculate</b> () const =0</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Abstract base class for variables with a value which is recalculated when the precision has changed.
<p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a9"></a><!-- doxytag: member=<DynamicVariable::calculatedPrecision> ref=<a9> args=<() const > --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int DynamicVariable::calculatedPrecision </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Returns the precision of the calculated value.<p>
<dl compact><dt><b>Returns:</b></dt><dd>Precision of the calculated value or zero if the value has not yet been calculated.</dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="a6"></a><!-- doxytag: member=<DynamicVariable::get> ref=<a6> args=<()> --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">const <a class="el" href="classMathStructure.html">MathStructure</a>& DynamicVariable::get </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> [virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Returns the value of the variable. If no value is set or parsed and an expression is set, the expression is parsed and resulting value returned.<p>
<dl compact><dt><b>Returns:</b></dt><dd>The value of the variable..</dd></dl>
<p>
Reimplemented from <a class="el" href="classKnownVariable.html#a13">KnownVariable</a>. </td>
</tr>
</table>
<a class="anchor" name="a10"></a><!-- doxytag: member=<DynamicVariable::representsPositive> ref=<a10> args=<(bool=false)> --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">virtual bool DynamicVariable::representsPositive </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">bool </td>
<td class="mdname1" valign="top" nowrap> = <code>false</code> </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">
<tr>
<td>
</td>
<td>
<p>
Returns if the variable represents a positive value.
<p>
Reimplemented from <a class="el" href="classKnownVariable.html#a14">KnownVariable</a>. </td>
</tr>
</table>
<a class="anchor" name="a8"></a><!-- doxytag: member=<DynamicVariable::set> ref=<a8> args=<(string expression_)> --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void DynamicVariable::set </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">string </td>
<td class="mdname1" valign="top" nowrap> <em>expression_</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Sets the text string expression of the variable. The value is cleared.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>expression_</em> </td><td>Expression.</td></tr>
</table>
</dl>
<p>
Reimplemented from <a class="el" href="classKnownVariable.html#a12">KnownVariable</a>. </td>
</tr>
</table>
<a class="anchor" name="a7"></a><!-- doxytag: member=<DynamicVariable::set> ref=<a7> args=<(const MathStructure &o)> --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void DynamicVariable::set </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classMathStructure.html">MathStructure</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>o</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Sets the value of the variable. If expression is set, it is cleared.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>o</em> </td><td>Value.</td></tr>
</table>
</dl>
<p>
Reimplemented from <a class="el" href="classKnownVariable.html#a11">KnownVariable</a>. </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li>libqalculate/<a class="el" href="Variable_8h.html">Variable.h</a></ul>
<hr size="1"><address style="align: right;"><small>
Generated on 17 Jun 2007 for libqalculate-0.9.6 by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.3</small></address>
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