t template basic_expr">proto::basic_expr</a><span class="special">&lt;</span> <a class="link" href="tag/less_equal.html" title="Struct less_equal">proto::tag::less_equal</a><span class="special">,</span> <a class="link" href="listN.html" title="Struct template listN">proto::list2</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">U</span> <span class="special">&gt;</span> <span class="special">&gt;</span> <a name="boost.proto.less_eq