an class="type-var">'v</span> * <span class="type-var">'a</span></code></td></tr><tr id="type-exp.Bound" class="anchored"><td class="def constructor"><a href="#type-exp.Bound" class="anchor"></a><code>| </code><code><span class="constructor">Bound</span> <span class="keyword">of</span> <span class="type-var">'b</span> * <span class="type-var">'a</span></code></td></tr><tr id="type-exp.Bits" class="anchored"><td class="def constructor"><a href="#type-exp.Bits" class="anchor"></a><code>| </code><code><span cl