>

<span class="comment">// The following two tokens have an associated attribute type, 'identifier'</span>
<span class="comment">// carries a string (the identifier name) and 'constant' carries the </span>
<span class="comment">// matched integer value.</span>
<span class="comment">//</span>
<span class="comment">// Note: any token attribute type explicitly specified in a token_def&lt;&gt;</span>
<span class="comment">//       declaration needs to be listed during token type definition as </span>
<span cla