at clause</span></span><span> = </span><span>{</span></code><ol><li id="type-clause.location" class="def record field anchored"><a href="#type-clause.location" class="anchor"></a><code><span>location : <a href="#type-location">location</a>;</span></code></li><li id="type-clause.patterns" class="def record field anchored"><a href="#type-clause.patterns" class="anchor"></a><code><span>patterns : <span><span class="type-var">'pat</span> list</span>;</span></code></li><li id="type-clause.guards" class="def reco