a href="#val-prune" class="anchor"></a><code><span><span class="keyword">val</span> prune : 
  <span><a href="../../IR/Tenv/index.html#type-t">IR.Tenv.t</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="label">positive</span>:bool <span class="arrow">&#45;&gt;</span></span>
  <span><a href="../../IR/Exp/index.html#type-t">IR.Exp.t</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span><a href="../Prop/index.html#type-normal">Prop.normal</a> <a href="../Prop/index.html#type-t">Prop.