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+<title>Class abstract_variables_map</title>
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+<div class="refentry" lang="en">
+<a name="abstract_variables_map"></a><div class="titlepage"></div>
+<div class="refnamediv">
+<h2><span class="refentrytitle">Class abstract_variables_map</span></h2>
+<p>boost::program_options::abstract_variables_map &#8212; </p>
+</div>
+<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
+<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis">
+<span class="bold"><strong>class</strong></span> abstract_variables_map {
+<span class="bold"><strong>public</strong></span>:
+  <span class="emphasis"><em>// <a href="abstract_variables_map.html#abstract_variables_mapconstruct-copy-destruct">construct/copy/destruct</a></em></span>
+  <a href="abstract_variables_map.html#id2363244-bb">abstract_variables_map</a>();
+  <a href="abstract_variables_map.html#id2363247-bb">abstract_variables_map</a>(<span class="bold"><strong>const</strong></span> <a href="abstract_variables_map.html" title="Class abstract_variables_map">abstract_variables_map</a> *);
+  <a href="abstract_variables_map.html#id2434664-bb">~abstract_variables_map</a>();
+
+  <span class="emphasis"><em>// <a href="abstract_variables_map.html#id2517131-bb">public member functions</a></em></span>
+  <span class="type"><span class="bold"><strong>const</strong></span> <a href="variable_value.html" title="Class variable_value">variable_value</a> &amp;</span> <a href="abstract_variables_map.html#id2517135-bb"><span class="bold"><strong>operator</strong></span>[]</a>(<span class="bold"><strong>const</strong></span> std::string &amp;) <span class="bold"><strong>const</strong></span>;
+  <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="abstract_variables_map.html#id2373603-bb">next</a>(<a href="abstract_variables_map.html" title="Class abstract_variables_map">abstract_variables_map</a> *) ;
+
+  <span class="emphasis"><em>// <a href="abstract_variables_map.html#id2434666-bb">private member functions</a></em></span>
+  <span class="type"><span class="bold"><strong>virtual</strong></span> <span class="bold"><strong>const</strong></span> <a href="variable_value.html" title="Class variable_value">variable_value</a> &amp;</span> <a href="abstract_variables_map.html#id2434670-bb">get</a>(<span class="bold"><strong>const</strong></span> std::string &amp;) <span class="bold"><strong>const</strong></span>;
+};</pre></div>
+<div class="refsect1" lang="en">
+<a name="id2729003"></a><h2>Description</h2>
+<p>Implements string-&gt;string mapping with convenient value casting facilities. </p>
+<div class="refsect2" lang="en">
+<a name="id2729012"></a><h3>
+<a name="abstract_variables_mapconstruct-copy-destruct"></a><code class="computeroutput">abstract_variables_map</code> construct/copy/destruct</h3>
+<div class="orderedlist"><ol type="1">
+<li><pre class="literallayout"><a name="id2363244-bb"></a>abstract_variables_map();</pre></li>
+<li><pre class="literallayout"><a name="id2363247-bb"></a>abstract_variables_map(<span class="bold"><strong>const</strong></span> <a href="abstract_variables_map.html" title="Class abstract_variables_map">abstract_variables_map</a> * next);</pre></li>
+<li><pre class="literallayout"><a name="id2434664-bb"></a>~abstract_variables_map();</pre></li>
+</ol></div>
+</div>
+<div class="refsect2" lang="en">
+<a name="id2729088"></a><h3>
+<a name="id2517131-bb"></a><code class="computeroutput">abstract_variables_map</code> public member functions</h3>
+<div class="orderedlist"><ol type="1">
+<li>
+<pre class="literallayout"><span class="type"><span class="bold"><strong>const</strong></span> <a href="variable_value.html" title="Class variable_value">variable_value</a> &amp;</span> <a name="id2517135-bb"></a><span class="bold"><strong>operator</strong></span>[](<span class="bold"><strong>const</strong></span> std::string &amp; name) <span class="bold"><strong>const</strong></span>;</pre>
+<p>Obtains the value of variable 'name', from *this and possibly from the chain of variable maps.</p>
+<div class="itemizedlist"><ul type="disc"><li>
+<p>if there's no value in *this.</p>
+<div class="itemizedlist"><ul type="circle">
+<li><p>if there's next variable map, returns value from it</p></li>
+<li><p>otherwise, returns empty value</p></li>
+</ul></div>
+</li></ul></div>
+<div class="itemizedlist"><ul type="disc"><li>
+<p>if there's defaulted value</p>
+<div class="itemizedlist"><ul type="circle">
+<li><p>if there's next varaible map, which has a non-defauled value, return that</p></li>
+<li><p>otherwise, return value from *this</p></li>
+</ul></div>
+</li></ul></div>
+<div class="itemizedlist"><ul type="disc"><li><p>if there's a non-defauled value, returns it. </p></li></ul></div>
+</li>
+<li>
+<pre class="literallayout"><span class="type"><span class="bold"><strong>void</strong></span></span> <a name="id2373603-bb"></a>next(<a href="abstract_variables_map.html" title="Class abstract_variables_map">abstract_variables_map</a> * next) ;</pre>
+<p>Sets next variable map, which will be used to find variables not found in *this. </p>
+</li>
+</ol></div>
+</div>
+<div class="refsect2" lang="en">
+<a name="id2729226"></a><h3>
+<a name="id2434666-bb"></a><code class="computeroutput">abstract_variables_map</code> private member functions</h3>
+<div class="orderedlist"><ol type="1"><li>
+<pre class="literallayout"><span class="type"><span class="bold"><strong>virtual</strong></span> <span class="bold"><strong>const</strong></span> <a href="variable_value.html" title="Class variable_value">variable_value</a> &amp;</span> <a name="id2434670-bb"></a>get(<span class="bold"><strong>const</strong></span> std::string &amp; name) <span class="bold"><strong>const</strong></span>;</pre>
+<p>Returns value of variable 'name' stored in *this, or empty value otherwise. </p>
+</li></ol></div>
+</div>
+</div>
+</div>
+<table width="100%"><tr>
+<td align="left"></td>
+<td align="right"><small>Copyright © 2002-2004 Vladimir Prus</small></td>
+</tr></table>
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