<code class="computeroutput"><span class="identifier">a</span></code>, <code class="computeroutput"><span class="identifier">b</span></code>,
        etc. are the operands. <code class="computeroutput"><span class="identifier">A</span></code>,
        <code class="computeroutput"><span class="identifier">B</span></code>, etc. are the operand's
        attribute types. <code class="computeroutput"><span class="identifier">composite</span><span class="special">-</span><span class="identifier">expression</span