n use all map operators to examine its content. </p>
<div class="refsect2">
<a name="id-1.3.31.9.12.6.4.4"></a><h3>
<a name="boost.program_options.variables_mapconstruct-copy-destruct"></a><code class="computeroutput">variables_map</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><a name="id-1_3_31_9_11_1_1_4_5-bb"></a><span class="identifier">variables_map</span><span class="special">(</span