<span class="type-var">'b</span>)</span> Stdlib.format4</span> <span>&#45;&gt;</span> <span class="type-var">'a</span></code></dt><dd><p>same as failwith but uses a format instead</p></dd></dl><dl><dt class="spec value" id="val-inplace_print"><a href="#val-inplace_print" class="anchor"></a><code><span class="keyword">val</span> inplace_print : unit <span>&#45;&gt;</span> Stdlib.Format.formatter <span>&#45;&gt;</span> string <span>&#45;&gt;</span> unit</code></dt><dd><p>printing that erases previous output. 