 <span class="type-var">'c</span> <span>&#45;&gt;</span> <span>(<a href="../../IR/Typ/index.html#type-t">IR.Typ.t</a> * <a href="../InferredNullability/index.html#type-t">InferredNullability.t</a>)</span> <span>&#45;&gt;</span> <a href="../../IBase/Location/index.html#type-t">IBase.Location.t</a> <span>&#45;&gt;</span> <span class="type-var">'d</span> * <a href="../InferredNullability/index.html#type-t">InferredNullability.t</a>)</span> <span>&#45;&gt;</span> unit</code></dt><dd><p>Check an assignment to a 