ntifier">a</span><span class="special">),</span> <span class="identifier">op1</span><span class="special">,</span> <span class="special">(</span><span class="identifier">b</span> <span class="identifier">op2</span> <span class="identifier">c</span><span class="special">))</span>
</pre>
<p class="simpara">
            In the above statement, the final expression can only see the result
            of <code class="computeroutput"><span class="special">(</span><span class="identifier">b</span>
            <spa