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<h2>Requirements<a class="headerlink" href="#requirements" title="Permalink to this headline">¶</a></h2>
<p>F must be at least:</p>
<ul class="simple">
<li><a class="reference internal" href="../../../doc/src/concepts.html#binaryinvocable"><span class="std std-ref">BinaryInvocable</span></a></li>
</ul>
<p>Or:</p>
<ul class="simple">
<li><a class="reference internal" href="../../../doc/src/concepts.html#invocable"><span class="std std-ref">Invocable</span></a> with more than two argurments</li>
</ul>
<p>A