ed" id="val-relative_complements"><a href="#val-relative_complements" class="anchor"></a><code><span><span class="keyword">val</span> relative_complements : 
  <span><span class="label">compare</span>:<span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> int)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="label">pred</span>:<span>(<span><span class="type-var">'a</sp