./../IR/Ident/index.html#type-t">IR.Ident.t</a> )</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span>( <span><a href="../../IR/Exp/index.html#type-t">IR.Exp.t</a> <span class="arrow">&#45;&gt;</span></span> <a href="../../IR/Exp/index.html#type-t">IR.Exp.t</a> )</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></span></code></div><div class="spec-doc"><p><code>sub_map f g sub<