<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>libqalculate-0.9.7: libqalculate/Variable.h File Reference</title> <link href="doxygen.css" rel="stylesheet" type="text/css"> <link href="tabs.css" rel="stylesheet" type="text/css"> </head><body> <!-- Generated by Doxygen 1.5.5 --> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> </div> <div class="contents"> <h1>libqalculate/Variable.h File Reference</h1><code>#include <<a class="el" href="ExpressionItem_8h.html">libqalculate/ExpressionItem.h</a>></code><br> <code>#include <<a class="el" href="includes_8h.html">libqalculate/includes.h</a>></code><br> <table border="0" cellpadding="0" cellspacing="0"> <tr><td></td></tr> <tr><td colspan="2"><br><h2>Classes</h2></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classAssumptions.html">Assumptions</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">An assumption about an unknown mathematical value. <a href="classAssumptions.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classVariable.html">Variable</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Abstract base class for variables. <a href="classVariable.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classUnknownVariable.html">UnknownVariable</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">A variable with unknown value. <a href="classUnknownVariable.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classKnownVariable.html">KnownVariable</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">A variable with a known value. <a href="classKnownVariable.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classDynamicVariable.html">DynamicVariable</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Abstract base class for variables with a value which is recalculated when the precision has changed. <a href="classDynamicVariable.html#_details">More...</a><br></td></tr> <tr><td colspan="2"><br><h2>Defines</h2></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><b>DECLARE_BUILTIN_VARIABLE</b>(x)</td></tr> <tr><td colspan="2"><br><h2>Enumerations</h2></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="Variable_8h.html#234f949bbd82bd0094a7abaa482b74ee">AssumptionType</a> { <br> <b>ASSUMPTION_TYPE_NONE</b> = 0, <a class="el" href="Variable_8h.html#234f949bbd82bd0094a7abaa482b74eedc674bfb98c06497f90910b5584e74b7">ASSUMPTION_TYPE_NONMATRIX</a> = 1, <b>ASSUMPTION_TYPE_NUMBER</b> = 2, <a class="el" href="Variable_8h.html#234f949bbd82bd0094a7abaa482b74ee9fd7978553322b3f05e1c80c716f9082">ASSUMPTION_TYPE_COMPLEX</a> = 3, <br> <b>ASSUMPTION_TYPE_REAL</b> = 4, <b>ASSUMPTION_TYPE_RATIONAL</b> = 5, <b>ASSUMPTION_TYPE_INTEGER</b> = 6 <br> }</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Type assumption. <a href="Variable_8h.html#234f949bbd82bd0094a7abaa482b74ee">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed2">AssumptionSign</a> { <br> <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed29001727eae45c319699f4a9a5f50783d">ASSUMPTION_SIGN_UNKNOWN</a>, <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed2ef84f6b2c7f74368293a3ed6359f1898">ASSUMPTION_SIGN_POSITIVE</a>, <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed25406750de938e15aafda3690b97a8af2">ASSUMPTION_SIGN_NONNEGATIVE</a>, <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed28dd11f509b96a55816f2750b0f662f13">ASSUMPTION_SIGN_NEGATIVE</a>, <br> <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed21ea1f2e9a16a7ba6f6d73444e474ce6a">ASSUMPTION_SIGN_NONPOSITIVE</a>, <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed213b999f32a9b0ce72761231e3353525a">ASSUMPTION_SIGN_NONZERO</a> <br> }</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Signedness assumption. <a href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed2">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a78474">VariableSubtype</a> { <a class="el" href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a78474c0010dfb645f4eb008672ddbd8556466">SUBTYPE_VARIABLE</a>, <a class="el" href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a784749c7252959dd339ea895369569d8f62af">SUBTYPE_UNKNOWN_VARIABLE</a>, <a class="el" href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a7847493455d9d5b1cc1ed053be7689a17e438">SUBTYPE_KNOWN_VARIABLE</a> }</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Type of variable. <a href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a78474">More...</a><br></td></tr> </table> <hr><a name="_details"></a><h2>Detailed Description</h2> <hr><h2>Define Documentation</h2> <a class="anchor" name="ae2d27313cb83deb068bc3e0f6e81c01"></a><!-- doxytag: member="Variable.h::DECLARE_BUILTIN_VARIABLE" ref="ae2d27313cb83deb068bc3e0f6e81c01" args="(x)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">#define DECLARE_BUILTIN_VARIABLE </td> <td>(</td> <td class="paramtype">x </td> <td class="paramname"> </td> <td> ) </td> <td width="100%"></td> </tr> </table> </div> <div class="memdoc"> <p> <b>Value:</b><div class="fragment"><pre class="fragment"><span class="keyword">class </span>x : <span class="keyword">public</span> <a class="code" href="classDynamicVariable.html" title="Abstract base class for variables with a value which is recalculated when the precision...">DynamicVariable</a> { \ <span class="keyword">private</span>: \ <span class="keywordtype">void</span> calculate() <span class="keyword">const</span>; \ <span class="keyword">public</span>: \ x(); \ x(<span class="keyword">const</span> x *variable) {<span class="keyword">set</span>(variable);} \ <a class="code" href="classExpressionItem.html" title="Abstract base class for functions, variables and units.">ExpressionItem</a> *copy()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">new</span> x(<span class="keyword">this</span>);} \ }; </pre></div> </div> </div><p> <hr><h2>Enumeration Type Documentation</h2> <a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed2"></a><!-- doxytag: member="Variable.h::AssumptionSign" ref="ca19eaaa629c9a84e1bdc469ca1a4ed2" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">enum <a class="el" href="Variable_8h.html#ca19eaaa629c9a84e1bdc469ca1a4ed2">AssumptionSign</a> </td> </tr> </table> </div> <div class="memdoc"> <p> Signedness assumption. <p> <dl compact><dt><b>Enumerator: </b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed29001727eae45c319699f4a9a5f50783d"></a><!-- doxytag: member="ASSUMPTION_SIGN_UNKNOWN" ref="ca19eaaa629c9a84e1bdc469ca1a4ed29001727eae45c319699f4a9a5f50783d" args="" -->ASSUMPTION_SIGN_UNKNOWN</em> </td><td> x = ? </td></tr> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed2ef84f6b2c7f74368293a3ed6359f1898"></a><!-- doxytag: member="ASSUMPTION_SIGN_POSITIVE" ref="ca19eaaa629c9a84e1bdc469ca1a4ed2ef84f6b2c7f74368293a3ed6359f1898" args="" -->ASSUMPTION_SIGN_POSITIVE</em> </td><td> x > 0 </td></tr> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed25406750de938e15aafda3690b97a8af2"></a><!-- doxytag: member="ASSUMPTION_SIGN_NONNEGATIVE" ref="ca19eaaa629c9a84e1bdc469ca1a4ed25406750de938e15aafda3690b97a8af2" args="" -->ASSUMPTION_SIGN_NONNEGATIVE</em> </td><td> x >= 0 </td></tr> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed28dd11f509b96a55816f2750b0f662f13"></a><!-- doxytag: member="ASSUMPTION_SIGN_NEGATIVE" ref="ca19eaaa629c9a84e1bdc469ca1a4ed28dd11f509b96a55816f2750b0f662f13" args="" -->ASSUMPTION_SIGN_NEGATIVE</em> </td><td> x < 0 </td></tr> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed21ea1f2e9a16a7ba6f6d73444e474ce6a"></a><!-- doxytag: member="ASSUMPTION_SIGN_NONPOSITIVE" ref="ca19eaaa629c9a84e1bdc469ca1a4ed21ea1f2e9a16a7ba6f6d73444e474ce6a" args="" -->ASSUMPTION_SIGN_NONPOSITIVE</em> </td><td> x <= 0 </td></tr> <tr><td valign="top"><em><a class="anchor" name="ca19eaaa629c9a84e1bdc469ca1a4ed213b999f32a9b0ce72761231e3353525a"></a><!-- doxytag: member="ASSUMPTION_SIGN_NONZERO" ref="ca19eaaa629c9a84e1bdc469ca1a4ed213b999f32a9b0ce72761231e3353525a" args="" -->ASSUMPTION_SIGN_NONZERO</em> </td><td> x != 0 </td></tr> </table> </dl> </div> </div><p> <a class="anchor" name="234f949bbd82bd0094a7abaa482b74ee"></a><!-- doxytag: member="Variable.h::AssumptionType" ref="234f949bbd82bd0094a7abaa482b74ee" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">enum <a class="el" href="Variable_8h.html#234f949bbd82bd0094a7abaa482b74ee">AssumptionType</a> </td> </tr> </table> </div> <div class="memdoc"> <p> Type assumption. <p> Each type is a subset of the type above. <dl compact><dt><b>Enumerator: </b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"><em><a class="anchor" name="234f949bbd82bd0094a7abaa482b74eedc674bfb98c06497f90910b5584e74b7"></a><!-- doxytag: member="ASSUMPTION_TYPE_NONMATRIX" ref="234f949bbd82bd0094a7abaa482b74eedc674bfb98c06497f90910b5584e74b7" args="" -->ASSUMPTION_TYPE_NONMATRIX</em> </td><td> Multiplication is NOT commutative. </td></tr> <tr><td valign="top"><em><a class="anchor" name="234f949bbd82bd0094a7abaa482b74ee9fd7978553322b3f05e1c80c716f9082"></a><!-- doxytag: member="ASSUMPTION_TYPE_COMPLEX" ref="234f949bbd82bd0094a7abaa482b74ee9fd7978553322b3f05e1c80c716f9082" args="" -->ASSUMPTION_TYPE_COMPLEX</em> </td><td> im(x) != 0 </td></tr> </table> </dl> </div> </div><p> <a class="anchor" name="0f580b0f6ebc7c28d007d2ce18a78474"></a><!-- doxytag: member="Variable.h::VariableSubtype" ref="0f580b0f6ebc7c28d007d2ce18a78474" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">enum <a class="el" href="Variable_8h.html#0f580b0f6ebc7c28d007d2ce18a78474">VariableSubtype</a> </td> </tr> </table> </div> <div class="memdoc"> <p> Type of variable. <p> <dl compact><dt><b>Enumerator: </b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"><em><a class="anchor" name="0f580b0f6ebc7c28d007d2ce18a78474c0010dfb645f4eb008672ddbd8556466"></a><!-- doxytag: member="SUBTYPE_VARIABLE" ref="0f580b0f6ebc7c28d007d2ce18a78474c0010dfb645f4eb008672ddbd8556466" args="" -->SUBTYPE_VARIABLE</em> </td><td> class <a class="el" href="classVariable.html" title="Abstract base class for variables.">Variable</a> </td></tr> <tr><td valign="top"><em><a class="anchor" name="0f580b0f6ebc7c28d007d2ce18a784749c7252959dd339ea895369569d8f62af"></a><!-- doxytag: member="SUBTYPE_UNKNOWN_VARIABLE" ref="0f580b0f6ebc7c28d007d2ce18a784749c7252959dd339ea895369569d8f62af" args="" -->SUBTYPE_UNKNOWN_VARIABLE</em> </td><td> class <a class="el" href="classUnknownVariable.html" title="A variable with unknown value.">UnknownVariable</a> </td></tr> <tr><td valign="top"><em><a class="anchor" name="0f580b0f6ebc7c28d007d2ce18a7847493455d9d5b1cc1ed053be7689a17e438"></a><!-- doxytag: member="SUBTYPE_KNOWN_VARIABLE" ref="0f580b0f6ebc7c28d007d2ce18a7847493455d9d5b1cc1ed053be7689a17e438" args="" -->SUBTYPE_KNOWN_VARIABLE</em> </td><td> class <a class="el" href="classKnownVariable.html" title="A variable with a known value.">KnownVariable</a> </td></tr> </table> </dl> </div> </div><p> </div> <hr size="1"><address style="text-align: 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