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non_terminal
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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java_cup</FONT>
<BR>
Class non_terminal</H2>
<PRE>
java.lang.Object
<IMG SRC="../resources/inherit.gif" ALT="extended by "><A HREF="../java_cup/symbol.html" title="class in java_cup">java_cup.symbol</A>
<IMG SRC="../resources/inherit.gif" ALT="extended by "><B>java_cup.non_terminal</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>non_terminal</B><DT>extends <A HREF="../java_cup/symbol.html" title="class in java_cup">symbol</A></DL>
</PRE>
<P>
This class represents a non-terminal symbol in the grammar. Each
non terminal has a textual name, an index, and a string which indicates
the type of object it will be implemented with at runtime (i.e. the class
of object that will be pushed on the parse stack to represent it).
<P>
<P>
<DL>
<DT><B>Version:</B></DT>
<DD>last updated: 11/25/95</DD>
<DT><B>Author:</B></DT>
<DD>Scott Hudson</DD>
</DL>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
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<B>Field Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static java.util.Hashtable</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#_all">_all</A></B></CODE>
<BR>
Table of all non-terminals -- elements are stored using name strings
as the key</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static java.util.Hashtable</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#_all_by_index">_all_by_index</A></B></CODE>
<BR>
Table of all non terminals indexed by their index number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../java_cup/terminal_set.html" title="class in java_cup">terminal_set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#_first_set">_first_set</A></B></CODE>
<BR>
First set for this non-terminal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#_nullable">_nullable</A></B></CODE>
<BR>
Nullability of this non terminal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.util.Hashtable</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#_productions">_productions</A></B></CODE>
<BR>
Table of all productions with this non terminal on the LHS.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#is_embedded_action">is_embedded_action</A></B></CODE>
<BR>
flag non-terminals created to embed action productions</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#next_index">next_index</A></B></CODE>
<BR>
Static counter to assign unique indexes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#next_nt">next_nt</A></B></CODE>
<BR>
Static counter for creating unique non-terminal names</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#START_nt">START_nt</A></B></CODE>
<BR>
special non-terminal for start symbol</TD>
</TR>
</TABLE>
<A NAME="fields_inherited_from_class_java_cup.symbol"><!-- --></A>
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<TH ALIGN="left"><B>Fields inherited from class java_cup.<A HREF="../java_cup/symbol.html" title="class in java_cup">symbol</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../java_cup/symbol.html#_index">_index</A>, <A HREF="../java_cup/symbol.html#_name">_name</A>, <A HREF="../java_cup/symbol.html#_stack_type">_stack_type</A>, <A HREF="../java_cup/symbol.html#_use_count">_use_count</A></CODE></TD>
</TR>
</TABLE>
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<B>Constructor Summary</B></FONT></TH>
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<TD><CODE><B><A HREF="../java_cup/non_terminal.html#non_terminal(java.lang.String)">non_terminal</A></B>(java.lang.String nm)</CODE>
<BR>
Constructor with default type.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#non_terminal(java.lang.String, java.lang.String)">non_terminal</A></B>(java.lang.String nm,
java.lang.String tp)</CODE>
<BR>
Full constructor.</TD>
</TR>
</TABLE>
<!-- ========== METHOD SUMMARY =========== -->
<A NAME="method_summary"><!-- --></A>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#add_production(java_cup.production)">add_production</A></B>(<A HREF="../java_cup/production.html" title="class in java_cup">production</A> prod)</CODE>
<BR>
Add a production to our set of productions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.util.Enumeration</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#all()">all</A></B>()</CODE>
<BR>
Access to all non-terminals.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#compute_first_sets()">compute_first_sets</A></B>()</CODE>
<BR>
Compute first sets for all non-terminals.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#compute_nullability()">compute_nullability</A></B>()</CODE>
<BR>
Compute nullability of all non-terminals.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#find(int)">find</A></B>(int indx)</CODE>
<BR>
Lookup a non terminal by index.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#find(java.lang.String)">find</A></B>(java.lang.String with_name)</CODE>
<BR>
lookup a non terminal by name string</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../java_cup/terminal_set.html" title="class in java_cup">terminal_set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#first_set()">first_set</A></B>()</CODE>
<BR>
First set for this non-terminal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#is_non_term()">is_non_term</A></B>()</CODE>
<BR>
Indicate that this symbol is a non-terminal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#looks_nullable()">looks_nullable</A></B>()</CODE>
<BR>
Test to see if this non terminal currently looks nullable.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#nullable()">nullable</A></B>()</CODE>
<BR>
Nullability of this non terminal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#num_productions()">num_productions</A></B>()</CODE>
<BR>
Total number of productions with this non terminal on the LHS.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#number()">number</A></B>()</CODE>
<BR>
Total number of non-terminals.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Enumeration</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#productions()">productions</A></B>()</CODE>
<BR>
Access to productions with this non terminal on the LHS.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../java_cup/non_terminal.html#toString()">toString</A></B>()</CODE>
<BR>
convert to string</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java_cup.symbol"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java_cup.<A HREF="../java_cup/symbol.html" title="class in java_cup">symbol</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../java_cup/symbol.html#index()">index</A>, <A HREF="../java_cup/symbol.html#name()">name</A>, <A HREF="../java_cup/symbol.html#note_use()">note_use</A>, <A HREF="../java_cup/symbol.html#stack_type()">stack_type</A>, <A HREF="../java_cup/symbol.html#use_count()">use_count</A></CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Field Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="_all"><!-- --></A><H3>
_all</H3>
<PRE>
protected static java.util.Hashtable <B>_all</B></PRE>
<DL>
<DD>Table of all non-terminals -- elements are stored using name strings
as the key
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="_all_by_index"><!-- --></A><H3>
_all_by_index</H3>
<PRE>
protected static java.util.Hashtable <B>_all_by_index</B></PRE>
<DL>
<DD>Table of all non terminals indexed by their index number.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="next_index"><!-- --></A><H3>
next_index</H3>
<PRE>
protected static int <B>next_index</B></PRE>
<DL>
<DD>Static counter to assign unique indexes.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="next_nt"><!-- --></A><H3>
next_nt</H3>
<PRE>
protected static int <B>next_nt</B></PRE>
<DL>
<DD>Static counter for creating unique non-terminal names
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="START_nt"><!-- --></A><H3>
START_nt</H3>
<PRE>
public static final <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A> <B>START_nt</B></PRE>
<DL>
<DD>special non-terminal for start symbol
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="is_embedded_action"><!-- --></A><H3>
is_embedded_action</H3>
<PRE>
public boolean <B>is_embedded_action</B></PRE>
<DL>
<DD>flag non-terminals created to embed action productions
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="_productions"><!-- --></A><H3>
_productions</H3>
<PRE>
protected java.util.Hashtable <B>_productions</B></PRE>
<DL>
<DD>Table of all productions with this non terminal on the LHS.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="_nullable"><!-- --></A><H3>
_nullable</H3>
<PRE>
protected boolean <B>_nullable</B></PRE>
<DL>
<DD>Nullability of this non terminal.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="_first_set"><!-- --></A><H3>
_first_set</H3>
<PRE>
protected <A HREF="../java_cup/terminal_set.html" title="class in java_cup">terminal_set</A> <B>_first_set</B></PRE>
<DL>
<DD>First set for this non-terminal.
<P>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="non_terminal(java.lang.String, java.lang.String)"><!-- --></A><H3>
non_terminal</H3>
<PRE>
public <B>non_terminal</B>(java.lang.String nm,
java.lang.String tp)</PRE>
<DL>
<DD>Full constructor.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>nm</CODE> - the name of the non terminal.<DD><CODE>tp</CODE> - the type string for the non terminal.</DL>
</DL>
<HR>
<A NAME="non_terminal(java.lang.String)"><!-- --></A><H3>
non_terminal</H3>
<PRE>
public <B>non_terminal</B>(java.lang.String nm)</PRE>
<DL>
<DD>Constructor with default type.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>nm</CODE> - the name of the non terminal.</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="all()"><!-- --></A><H3>
all</H3>
<PRE>
public static java.util.Enumeration <B>all</B>()</PRE>
<DL>
<DD>Access to all non-terminals.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="find(java.lang.String)"><!-- --></A><H3>
find</H3>
<PRE>
public static <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A> <B>find</B>(java.lang.String with_name)</PRE>
<DL>
<DD>lookup a non terminal by name string
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="find(int)"><!-- --></A><H3>
find</H3>
<PRE>
public static <A HREF="../java_cup/non_terminal.html" title="class in java_cup">non_terminal</A> <B>find</B>(int indx)</PRE>
<DL>
<DD>Lookup a non terminal by index.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="number()"><!-- --></A><H3>
number</H3>
<PRE>
public static int <B>number</B>()</PRE>
<DL>
<DD>Total number of non-terminals.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="compute_nullability()"><!-- --></A><H3>
compute_nullability</H3>
<PRE>
public static void <B>compute_nullability</B>()
throws <A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></PRE>
<DL>
<DD>Compute nullability of all non-terminals.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="compute_first_sets()"><!-- --></A><H3>
compute_first_sets</H3>
<PRE>
public static void <B>compute_first_sets</B>()
throws <A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></PRE>
<DL>
<DD>Compute first sets for all non-terminals. This assumes nullability has
already computed.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="productions()"><!-- --></A><H3>
productions</H3>
<PRE>
public java.util.Enumeration <B>productions</B>()</PRE>
<DL>
<DD>Access to productions with this non terminal on the LHS.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="num_productions()"><!-- --></A><H3>
num_productions</H3>
<PRE>
public int <B>num_productions</B>()</PRE>
<DL>
<DD>Total number of productions with this non terminal on the LHS.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="add_production(java_cup.production)"><!-- --></A><H3>
add_production</H3>
<PRE>
public void <B>add_production</B>(<A HREF="../java_cup/production.html" title="class in java_cup">production</A> prod)
throws <A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></PRE>
<DL>
<DD>Add a production to our set of productions.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nullable()"><!-- --></A><H3>
nullable</H3>
<PRE>
public boolean <B>nullable</B>()</PRE>
<DL>
<DD>Nullability of this non terminal.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="first_set()"><!-- --></A><H3>
first_set</H3>
<PRE>
public <A HREF="../java_cup/terminal_set.html" title="class in java_cup">terminal_set</A> <B>first_set</B>()</PRE>
<DL>
<DD>First set for this non-terminal.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="is_non_term()"><!-- --></A><H3>
is_non_term</H3>
<PRE>
public boolean <B>is_non_term</B>()</PRE>
<DL>
<DD>Indicate that this symbol is a non-terminal.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../java_cup/symbol.html#is_non_term()">is_non_term</A></CODE> in class <CODE><A HREF="../java_cup/symbol.html" title="class in java_cup">symbol</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="looks_nullable()"><!-- --></A><H3>
looks_nullable</H3>
<PRE>
protected boolean <B>looks_nullable</B>()
throws <A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></PRE>
<DL>
<DD>Test to see if this non terminal currently looks nullable.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../java_cup/internal_error.html" title="class in java_cup">internal_error</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>convert to string
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../java_cup/symbol.html#toString()">toString</A></CODE> in class <CODE><A HREF="../java_cup/symbol.html" title="class in java_cup">symbol</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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