lr_item_core.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_13) on Tue Jul 15 15:48:47 NZST 2008 --><TITLE>lr_item_core</TITLE><META NAME="keywords" CONTENT="weka.core.parser.java_cup.lr_item_core class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="lr_item_core";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="http://www.cs.waikato.ac.nz/ml/weka/" target="_blank"><FONT CLASS="NavBarFont1"><B>Weka's home</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../weka/core/parser/java_cup/Lexer.html" title="class in weka.core.parser.java_cup"><B>PREV CLASS</B></A> <A HREF="../../../../weka/core/parser/java_cup/Main.html" title="class in weka.core.parser.java_cup"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?weka/core/parser/java_cup/lr_item_core.html" target="_top"><B>FRAMES</B></A> <A HREF="lr_item_core.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">weka.core.parser.java_cup</FONT><BR>Class lr_item_core</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>weka.core.parser.java_cup.lr_item_core</B></PRE><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A></DD></DL><HR><DL><DT><PRE>public class <B>lr_item_core</B><DT>extends java.lang.Object</DL></PRE><P>The "core" of an LR item. This includes a production and the position of a marker (the "dot") within the production. Typically item cores are written using a production with an embedded "dot" to indicate their position. For example: <pre> A ::= B * C d E </pre> This represents a point in a parse where the parser is trying to match the given production, and has succeeded in matching everything before the "dot" (and hence is expecting to see the symbols after the dot next). See lalr_item, lalr_item_set, and lalr_start for full details on the meaning and use of items.<P><P><DL><DT><B>Version:</B></DT> <DD>last updated: 11/25/95</DD><DT><B>Author:</B></DT> <DD>Scott Hudson</DD><DT><B>See Also:</B><DD><A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup"><CODE>lalr_item</CODE></A>, <A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup"><CODE>lalr_item_set</CODE></A>, <A HREF="../../../../weka/core/parser/java_cup/lalr_state.html" title="class in weka.core.parser.java_cup"><CODE>lalr_state</CODE></A></DL><HR><P><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#lr_item_core(weka.core.parser.java_cup.production)">lr_item_core</A></B>(<A HREF="../../../../weka/core/parser/java_cup/production.html" title="class in weka.core.parser.java_cup">production</A> prod)</CODE><BR> Constructor for dot at start of right hand side.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#lr_item_core(weka.core.parser.java_cup.production, int)">lr_item_core</A></B>(<A HREF="../../../../weka/core/parser/java_cup/production.html" title="class in weka.core.parser.java_cup">production</A> prod, int pos)</CODE><BR> Full constructor.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></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="../../../../weka/core/parser/java_cup/lr_item_core.html#core_equals(weka.core.parser.java_cup.lr_item_core)">core_equals</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html" title="class in weka.core.parser.java_cup">lr_item_core</A> other)</CODE><BR> Equality comparison for the core only.</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="../../../../weka/core/parser/java_cup/lr_item_core.html#core_hashCode()">core_hashCode</A></B>()</CODE><BR> Hash code for the core (separated so we keep non overridden version).</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="../../../../weka/core/parser/java_cup/lr_item_core.html#dot_at_end()">dot_at_end</A></B>()</CODE><BR> Is the dot at the end of the production?</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../weka/core/parser/java_cup/non_terminal.html" title="class in weka.core.parser.java_cup">non_terminal</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#dot_before_nt()">dot_before_nt</A></B>()</CODE><BR> Determine if we have a dot before a non terminal, and if so which one (return null or the 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="../../../../weka/core/parser/java_cup/lr_item_core.html#dot_pos()">dot_pos</A></B>()</CODE><BR> The position of the "dot" -- this indicates the part of the production that the marker is before, so 0 indicates a dot at the beginning of the RHS.</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="../../../../weka/core/parser/java_cup/lr_item_core.html#equals(weka.core.parser.java_cup.lr_item_core)">equals</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html" title="class in weka.core.parser.java_cup">lr_item_core</A> other)</CODE><BR> Equality comparison.</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="../../../../weka/core/parser/java_cup/lr_item_core.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object other)</CODE><BR> Generic equality comparison.</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="../../../../weka/core/parser/java_cup/lr_item_core.html#hashCode()">hashCode</A></B>()</CODE><BR> Hash code for the item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html" title="class in weka.core.parser.java_cup">lr_item_core</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#shift_core()">shift_core</A></B>()</CODE><BR> Produce a new lr_item_core that results from shifting the dot one position to the right.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../weka/core/parser/java_cup/symbol.html" title="class in weka.core.parser.java_cup">symbol</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#symbol_after_dot()">symbol_after_dot</A></B>()</CODE><BR> Return the symbol after the dot.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../weka/core/parser/java_cup/production.html" title="class in weka.core.parser.java_cup">production</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lr_item_core.html#the_production()">the_production</A></B>()</CODE><BR> The production for the item.</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="../../../../weka/core/parser/java_cup/lr_item_core.html#to_simple_string()">to_simple_string</A></B>()</CODE><BR> Convert to a string (separated out from toString() so we can call it from subclass that overrides toString()).</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="../../../../weka/core/parser/java_cup/lr_item_core.html#toString()">toString</A></B>()</CODE><BR> Convert to a string</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>getClass, notify, notifyAll, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ========= 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 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