" class="anchor"></a><code><span class="keyword">val</span> compare : <span><span>(<span class="type-var">'b</span>, <span class="type-var">'v</span>, <span class="type-var">'a</span>)</span> <a href="../Types/index.html#type-below_above">Types.below_above</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'b</span>, <span class="type-var">'v</span>, <span class="type-var">'a</span>)</span> <a href="../Types/index.html#type-below_above">Types.below_above</a></span> <span>&#45;&gt;</sp