'a -&gt; 'a -&gt; bool</code></pre><div class="info ">
Structural ordering functions. These functions coincide with
   the usual orderings over integers, characters, strings, byte sequences
   and floating-point numbers, and extend them to a
   total ordering over all types.
   The ordering is compatible with <code class="code">( = )</code>. As in the case
   of <code class="code">( = )</code>, mutable structures are compared by contents.
   Comparison between functional values raises <code class="code"><sp