lass="keyword">const</span> <a class="link" href="basic_environment.html" title="Class template basic_environment">basic_environment</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span></pre>Copy constructor. </li>
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<pre class="literallayout"><a name="idp51514368-bb"></a><span class="identifier">basic_environment</span><span class="special">(</span><a class="link" href="basic_environment.html" title="Class template basic_environment">basic_e