pan> <span>int <span class="arrow">&#45;&gt;</span></span> <span>string <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_char"><a href="#val-of_char" class="anchor"></a><code><span><span class="keyword">val</span> of_char : <span>char <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_gen"><a href="#val-of_gen" class="anchor