filter_pair" class="anchor"></a><code><span><span class="keyword">val</span> sub_filter_pair : <span><a href="#type-subst">subst</a> <span class="arrow">&#45;&gt;</span></span> <span>f:<span>( <span><span>(<a href="../../IR/Ident/index.html#type-t">IR.Ident.t</a> * <a href="../../IR/Exp/index.html#type-t">IR.Exp.t</a>)</span> <span class="arrow">&#45;&gt;</span></span> bool )</span> <span class="arrow">&#45;&gt;</span></span> <a href="#type-subst">subst</a></span></code></div><div class="spec-doc"><p><code>