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<title>QuantLib: DerivedQuote Class Template Reference</title>
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<h3 class="subtitle">A free/open-source library for quantitative finance</h3>
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<a class="el" href="namespace_quant_lib.html">QuantLib</a>::<a class="el" href="class_quant_lib_1_1_derived_quote.html">DerivedQuote</a></div>
<h1>DerivedQuote Class Template Reference</h1><!-- doxytag: class="QuantLib::DerivedQuote" --><!-- doxytag: inherits="QuantLib::Quote,QuantLib::Observer" --><code>#include <ql/quotes/derivedquote.hpp></code>
<p>
<div class="dynheader">
Inheritance diagram for DerivedQuote:</div>
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<p><center><img src="class_quant_lib_1_1_derived_quote__inherit__graph.png" border="0" usemap="#_derived_quote__inherit__map" alt="Inheritance graph"></center>
<map name="_derived_quote__inherit__map">
<area shape="rect" href="class_quant_lib_1_1_quote.html" title="purely virtual base class for market observables" alt="" coords="5,7,67,33"><area shape="rect" href="class_quant_lib_1_1_observer.html" title="Object that gets notified when a given observable changes." alt="" coords="91,7,171,33"></map>
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<a href="class_quant_lib_1_1_derived_quote-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
<h3>template<class UnaryFunction><br>
class QuantLib::DerivedQuote< UnaryFunction ></h3>
market quote whose value depends on another quote
<p>
<dl compact><dt><b><a class="el" href="test.html#_test000118">Tests:</a></b></dt><dd>the correctness of the returned values is tested by checking them against numerical calculations. </dd></dl>
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<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="a20eb7655926a809d96c85943c38979a"></a><!-- doxytag: member="QuantLib::DerivedQuote::DerivedQuote" ref="a20eb7655926a809d96c85943c38979a" args="(const Handle< Quote > &element, const UnaryFunction &f)" -->
</td><td class="memItemRight" valign="bottom"><b>DerivedQuote</b> (const <a class="el" href="class_quant_lib_1_1_handle.html">Handle</a>< <a class="el" href="class_quant_lib_1_1_quote.html">Quote</a> > &element, const UnaryFunction &f)</td></tr>
<tr><td colspan="2"><div class="groupHeader">Quote interface</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b7f31cfaca49d25079e464ca462d691c"></a><!-- doxytag: member="QuantLib::DerivedQuote::value" ref="b7f31cfaca49d25079e464ca462d691c" args="() const " -->
<a class="el" href="group__types.html#g4bdf4bfe76b9ffa6fa64c47d8bfa0c78">Real</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_derived_quote.html#b7f31cfaca49d25079e464ca462d691c">value</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">returns the current value <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ac1b70a2ed67ead038c4d3f5ac4d8a81"></a><!-- doxytag: member="QuantLib::DerivedQuote::isValid" ref="ac1b70a2ed67ead038c4d3f5ac4d8a81" args="() const " -->
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_derived_quote.html#ac1b70a2ed67ead038c4d3f5ac4d8a81">isValid</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">returns true if the <a class="el" href="class_quant_lib_1_1_quote.html" title="purely virtual base class for market observables">Quote</a> holds a valid value <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Observer interface</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_quant_lib_1_1_derived_quote.html#c5c54df7ed3b930268c8d7752c101725">update</a> ()</td></tr>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="c5c54df7ed3b930268c8d7752c101725"></a><!-- doxytag: member="QuantLib::DerivedQuote::update" ref="c5c54df7ed3b930268c8d7752c101725" args="()" -->
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<td class="memname">void update </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [virtual]</code></td>
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<p>
This method must be implemented in derived classes. An instance of Observer does not call this method directly: instead, it will be called by the observables the instance registered with when they need to notify any changes.
<p>Implements <a class="el" href="class_quant_lib_1_1_observer.html#99b02345a8a15d3c5ea2844a2253f510">Observer</a>.</p>
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