DL>
</blockquote>

<H3>3.7 Trace output</H3>

<P>Coco/R can produce various output that can help in spotting LL(1) errors
or in understanding the generated parts. Trace output can be switched on with
command line options, or with the pragma </P>

<PRE>   '$' {digit | letter}
</PRE>

<P>at the beginning of the attributed grammar (for example $FS).  The output
goes to the file <I>listing.txt</I>. The effect of the switches is as follows:
</P>

<TABLE>
<TR>
<TD>
&nbsp;&nbsp;&nbsp;0 or A:<BR>
&nbsp;&nbsp;&nbsp;