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<p>Visitor class for evaluating the AST.
<a href="#details">More...</a></p>
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Inheritance diagram for PFunction::EvalVisitor:</div>
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Public Member Functions</h2></td></tr>
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<tr class="memdesc:ad0c74f37411d588c4964775c4d79d5ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Evaluates a complete expression with binary operators. <br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pri-attribs" name="pri-attribs"></a>
Private Attributes</h2></td></tr>
<tr class="memitem:ac72ca6501d9829ba98dad1f65ce1647f" id="r_ac72ca6501d9829ba98dad1f65ce1647f"><td class="memItemLeft" align="right" valign="top">const std::vector&lt; Int_t &gt; &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ac72ca6501d9829ba98dad1f65ce1647f">fMap</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Visitor class for evaluating the AST. </p>
<p>This visitor traverses the AST and computes the numeric value of the expression. It uses the visitor pattern with boost::static_visitor to handle different AST node types. </p>
<p class="definition">Definition at line <a class="el" href="PFunction_8h_source.html#l00179">179</a> of file <a class="el" href="PFunction_8h_source.html">PFunction.h</a>.</p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="acdb868631d6f2d2b268269bf3e72a0c2" name="acdb868631d6f2d2b268269bf3e72a0c2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acdb868631d6f2d2b268269bf3e72a0c2">&#9670;&#160;</a></span>EvalVisitor()</h2>
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<td class="memname">PFunction::EvalVisitor::EvalVisitor </td>
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<td class="paramtype">const std::vector&lt; Int_t &gt; &amp;</td> <td class="paramname"><span class="paramname"><em>map</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const std::vector&lt; Double_t &gt; &amp;</td> <td class="paramname"><span class="paramname"><em>param</em></span>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structPMetaData.html">PMetaData</a> &amp;</td> <td class="paramname"><span class="paramname"><em>metaData</em></span>&#160;)</td>
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<p class="definition">Definition at line <a class="el" href="PFunction_8h_source.html#l00182">182</a> of file <a class="el" href="PFunction_8h_source.html">PFunction.h</a>.</p>
<p class="reference">References <a class="el" href="PFunction_8h_source.html#l00197">fMap</a>, <a class="el" href="PFunction_8h_source.html#l00199">fMetaData</a>, and <a class="el" href="PFunction_8h_source.html#l00198">fParam</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="aa327bf668a817796245460d51d73fde7" name="aa327bf668a817796245460d51d73fde7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa327bf668a817796245460d51d73fde7">&#9670;&#160;</a></span>operator()() <span class="overload">[1/8]</span></h2>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
<td>(</td>
<td class="paramtype">const musrfit::ast::constant &amp;</td> <td class="paramname"><span class="paramname"><em>c</em></span></td><td>)</td>
<td> const</td>
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<p>Evaluates a constant (PI, GAMMA_MU, B, EN, T#). </p>
<p>Converts symbolic constants to their numeric values, including full support for experimental metadata (magnetic field, energy, temperature).</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">c</td><td>The constant AST node with type, sign, and optional index </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The constant's numeric value (with sign applied if negative) </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00451">451</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
<p class="reference">References <a class="el" href="PFunction_8h_source.html#l00199">fMetaData</a>, and <a class="el" href="PMusr_8h_source.html#l00138">GAMMA_BAR_MUON</a>.</p>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
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<p>Evaluates a complete expression with binary operators. </p>
<p>Evaluates the first operand, then applies each operation in sequence from left to right. The AST structure encodes operator precedence, so this left-to-right evaluation produces correct results.</p>
<p>Handles division by zero by checking if divisor magnitude is greater than 1e-20; otherwise returns 0.0 for that sub-expression.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">e</td><td>The expression AST node with first operand and operation list </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The computed result of the expression </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00649">649</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
<td>(</td>
<td class="paramtype">const musrfit::ast::function_call &amp;</td> <td class="paramname"><span class="paramname"><em>f</em></span></td><td>)</td>
<td> const</td>
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<p>Evaluates a function call (COS, SIN, EXP, SQRT, etc.). </p>
<p>Recursively evaluates the argument expression, then applies the specified mathematical function. Supports trigonometric, hyperbolic, inverse, exponential, and logarithmic functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>The function call AST node with function ID and argument expression </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The result of applying the mathematical function to the argument </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00552">552</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
<td>(</td>
<td class="paramtype">const musrfit::ast::leer &amp;</td> <td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td> const</td>
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<p>Evaluates a leer (empty) AST node. </p>
<dl class="section return"><dt>Returns</dt><dd>Always returns 0.0 </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00426">426</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
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<td class="paramtype">const musrfit::ast::map_ref &amp;</td> <td class="paramname"><span class="paramname"><em>m</em></span></td><td>)</td>
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<p>Evaluates a map reference (MAP#) for indirect parameter lookup. </p>
<p>Performs a two-level lookup: first looks up the map index in fMap, then uses that value to index into fParam. This allows for flexible parameter remapping. Validates both lookups and applies sign.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">m</td><td>The map reference AST node containing map number and sign </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>The indirectly referenced parameter value (with sign), or 0.0 if invalid </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00522">522</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
<p class="reference">References <a class="el" href="PFunction_8h_source.html#l00197">fMap</a>, and <a class="el" href="PFunction_8h_source.html#l00198">fParam</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a70eb1bcffe4f9094124e143141c063da">&#9670;&#160;</a></span>operator()() <span class="overload">[6/8]</span></h2>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
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<td class="paramtype">const musrfit::ast::parameter &amp;</td> <td class="paramname"><span class="paramname"><em>p</em></span></td><td>)</td>
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<p>Evaluates a parameter reference (PAR#). </p>
<p>Looks up the parameter value from the fParam vector using the parameter number (1-based indexing in syntax, 0-based in vector). Validates bounds and applies sign.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">p</td><td>The parameter AST node containing number and sign </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>The parameter value (with sign applied), or 0.0 if out of bounds </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00499">499</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
<p class="reference">References <a class="el" href="PFunction_8h_source.html#l00198">fParam</a>.</p>
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<a id="a1baed59c088c5071d058ebce29f722fe" name="a1baed59c088c5071d058ebce29f722fe"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1baed59c088c5071d058ebce29f722fe">&#9670;&#160;</a></span>operator()() <span class="overload">[7/8]</span></h2>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
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<td class="paramtype">const musrfit::ast::power_call &amp;</td> <td class="paramname"><span class="paramname"><em>p</em></span></td><td>)</td>
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<p>Evaluates a power operation POW(base, exponent). </p>
<p>Recursively evaluates both the base and exponent expressions, then computes base^exponent using std::pow. Uses absolute value of base to avoid complex number issues with negative bases.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">p</td><td>The power call AST node with base and exponent expressions </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The result of raising the base to the exponent power </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00603">603</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a3abef7e5172aa81882ff62aa4b64671b">&#9670;&#160;</a></span>operator()() <span class="overload">[8/8]</span></h2>
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<td class="memname">Double_t PFunction::EvalVisitor::operator() </td>
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<td class="paramtype">double</td> <td class="paramname"><span class="paramname"><em>val</em></span></td><td>)</td>
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<p>Evaluates a numeric literal. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>The literal value from the AST </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>The literal value unchanged </dd></dl>
<p class="definition">Definition at line <a class="el" href="PFunction_8cpp_source.html#l00437">437</a> of file <a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
<a id="ac72ca6501d9829ba98dad1f65ce1647f" name="ac72ca6501d9829ba98dad1f65ce1647f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac72ca6501d9829ba98dad1f65ce1647f">&#9670;&#160;</a></span>fMap</h2>
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<td class="memname">const std::vector&lt;Int_t&gt;&amp; PFunction::EvalVisitor::fMap</td>
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<span class="mlabels"><span class="mlabel private">private</span></span> </td>
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<p class="definition">Definition at line <a class="el" href="PFunction_8h_source.html#l00197">197</a> of file <a class="el" href="PFunction_8h_source.html">PFunction.h</a>.</p>
<p class="reference">Referenced by <a class="el" href="PFunction_8h_source.html#l00182">EvalVisitor()</a>, and <a class="el" href="PFunction_8cpp_source.html#l00522">operator()()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1f5659c1a2d05f91e020f931ff16089d">&#9670;&#160;</a></span>fMetaData</h2>
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<td class="memname">const <a class="el" href="structPMetaData.html">PMetaData</a>&amp; PFunction::EvalVisitor::fMetaData</td>
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<span class="mlabels"><span class="mlabel private">private</span></span> </td>
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<p class="definition">Definition at line <a class="el" href="PFunction_8h_source.html#l00199">199</a> of file <a class="el" href="PFunction_8h_source.html">PFunction.h</a>.</p>
<p class="reference">Referenced by <a class="el" href="PFunction_8h_source.html#l00182">EvalVisitor()</a>, and <a class="el" href="PFunction_8cpp_source.html#l00451">operator()()</a>.</p>
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<a id="a781726d9b2926266ec5509c1ff7e7730" name="a781726d9b2926266ec5509c1ff7e7730"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a781726d9b2926266ec5509c1ff7e7730">&#9670;&#160;</a></span>fParam</h2>
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<td class="memname">const std::vector&lt;Double_t&gt;&amp; PFunction::EvalVisitor::fParam</td>
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<span class="mlabels"><span class="mlabel private">private</span></span> </td>
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<p class="definition">Definition at line <a class="el" href="PFunction_8h_source.html#l00198">198</a> of file <a class="el" href="PFunction_8h_source.html">PFunction.h</a>.</p>
<p class="reference">Referenced by <a class="el" href="PFunction_8h_source.html#l00182">EvalVisitor()</a>, <a class="el" href="PFunction_8cpp_source.html#l00522">operator()()</a>, and <a class="el" href="PFunction_8cpp_source.html#l00499">operator()()</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>/workspace/LMU/musrfit/src/include/<a class="el" href="PFunction_8h_source.html">PFunction.h</a></li>
<li>/workspace/LMU/musrfit/src/classes/<a class="el" href="PFunction_8cpp_source.html">PFunction.cpp</a></li>
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