or</span><span class="special">&lt;</span> <span class="identifier">string_type</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>

    <span class="comment">// <a class="link" href="basic_environment/entry_type.html#idp51463072-bb">public member functions</a></span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="iden