pan class="type-var">'a</span>, <span class="type-var">'x</span>)</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> </span><span><span>(<span class="type-var">'b</span>, <span class="type-var">'x</span>)</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Sequentially compose two actions, passing any value produced by the first as an argument to the second.</p><p><code>&gt;&gt;=</code> and <code>=&lt;&lt;</code> are the infix versions of bind.</p></dd></dl><dl><dt class=