lass="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span>(unit, <span class="type-var">'err</span>)</span> <a href="../IStd/index.html#type-result">IStd.result</a></span>)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span>(unit, <span class="type-var">'err</span>)</span> <a href="../IStd/index.html#type-result">IStd.result</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold_result_until"><a href="#val-fold_result_un