></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'output</span> <span>&#45;&gt;</span> <span class="type-var">'next_acc</span>, <span><span class="type-var">'err</span> <a href="index.html#type-errors">errors</a></span>)</span> Stdlib.result</span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'next_acc</span>, <span><span class="type-var">'err</span> <a href="index.html#type-errors">errors</a></span>)</span> Stdlib.result</span></code></dt><dd><p>Chain validators</p><pre><