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