r">environment_t</span></a><span class="special">;</span>

    <span class="comment">// <a class="link" href="basic_environment/entry_type.html#boost.process.basic_environment.entry_typeconstruct-copy-destruct">construct/copy/destruct</a></span>
    <span class="identifier">entry</span> <span class="special">&amp;</span> <a class="link" href="basic_environment/entry_type.html#idp51476224-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="key