ass="keyword">sig</span> ... <span class="keyword">end</span></code></div><dl><dt class="spec value" id="val-associativity"><a href="#val-associativity" class="anchor"></a><code><span class="keyword">val</span> associativity : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="../argument-1-M/index.html#type-t">M.t</a></span>)</span> <span>&#45;&gt;</span> <span>(<span class="type-var">'b</span> <span>&#45;&gt;</span> <span><span class="type-var">'