s_key.html#fusion.sequence.intrinsic.functions.has_key.example">Example</a>
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<pre class="programlisting"><a class="link" href="../../../container/set.html" title="set"><code class="computeroutput"><span class="identifier">set</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span> <span class="identifier">s<