<map id="ystdex::vseq::at&lt; _tSeq, 0, when&lt; true &gt; &gt;" name="ystdex::vseq::at&lt; _tSeq, 0, when&lt; true &gt; &gt;">
<area shape="rect" id="node2" href="$db/d10/a00350.xhtml" title="ystdex::vseq::front\l\&lt; _tSeq \&gt;" alt="" coords="25,109,153,151"/>
<area shape="rect" id="node3" href="$db/d10/a00350.xhtml" title="取序列第一个元素。 " alt="" coords="16,5,161,47"/>
</map>
