pan class="keyword">val</span> compare_err_instance : <a href="index.html#type-err_instance">err_instance</a> <span>&#45;&gt;</span> <a href="index.html#type-err_instance">err_instance</a> <span>&#45;&gt;</span> int</code></dt></dl></div></div></div><dl><dt class="spec value" id="val-pp_err_instance"><a href="#val-pp_err_instance" class="anchor"></a><code><span class="keyword">val</span> pp_err_instance : Stdlib.Format.formatter <span>&#45;&gt;</span> <a href="index.html#type-err_instance">err_instance</a> 