nk" href="basic_environment/entry_type.html" title="Struct template entry_type">entry_type</a> <a class="link" href="basic_environment.html#idp51510352-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special"