VALID_ARGUMENT"</code>. Nevertheless, when printing an <a class="el" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89" title="Short-hand for flow::Error_code which is very common.">Error_code</a> storing a Code, continue to do the standard thing: output the <a class="el" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89" title="Short-hand for flow::Error_code which is very common.">Error_code</a> (which will print the category name, in our case, something like <code>"ipc/transport"</code>; 