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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>lalr_item_set</TITLE><META NAME="keywords" CONTENT="weka.core.parser.java_cup.lalr_item_set class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="lalr_item_set";}</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/lalr_item.html" title="class in weka.core.parser.java_cup"><B>PREV CLASS</B></A> <A HREF="../../../../weka/core/parser/java_cup/lalr_state.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/lalr_item_set.html" target="_top"><B>FRAMES</B></A> <A HREF="lalr_item_set.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 lalr_item_set</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>weka.core.parser.java_cup.lalr_item_set</B></PRE><HR><DL><DT><PRE>public class <B>lalr_item_set</B><DT>extends java.lang.Object</DL></PRE><P>This class represents a set of LALR items. For purposes of building these sets, items are considered unique only if they have unique cores (i.e., ignoring differences in their lookahead sets).<p> This class provides fairly conventional set oriented operations (union, sub/super-set tests, etc.), as well as an LALR "closure" operation (see compute_closure()).<P><P><DL><DT><B>Version:</B></DT> <DD>last updated: 3/6/96</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_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/lalr_item_set.html#lalr_item_set()">lalr_item_set</A></B>()</CODE><BR> Constructor for an empty set.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#lalr_item_set(weka.core.parser.java_cup.lalr_item_set)">lalr_item_set</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other)</CODE><BR> Constructor for cloning from another set.</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> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#add(weka.core.parser.java_cup.lalr_item_set)">add</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other)</CODE><BR> Add a complete set, merging lookaheads where items are already in the set</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/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#add(weka.core.parser.java_cup.lalr_item)">add</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A> itm)</CODE><BR> Add a singleton item, merging lookahead sets if the item is already part of the set.</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="../../../../weka/core/parser/java_cup/lalr_item_set.html#all()">all</A></B>()</CODE><BR> Access to all elements of the set.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#compute_closure()">compute_closure</A></B>()</CODE><BR> Compute the closure of the set using the LALR closure rules.</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/lalr_item_set.html#contains(weka.core.parser.java_cup.lalr_item)">contains</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A> itm)</CODE><BR> Does the set contain a particular item?</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/lalr_item_set.html#equals(weka.core.parser.java_cup.lalr_item_set)">equals</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</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/lalr_item_set.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> <A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#find(weka.core.parser.java_cup.lalr_item)">find</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A> itm)</CODE><BR> Return the item in the set matching a particular item (or null if not found)</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/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#get_one()">get_one</A></B>()</CODE><BR> Remove and return one item from the set (done in hash order).</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/lalr_item_set.html#hashCode()">hashCode</A></B>()</CODE><BR> Return hash code.</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/lalr_item_set.html#is_subset_of(weka.core.parser.java_cup.lalr_item_set)">is_subset_of</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other)</CODE><BR> Is this set an (improper) subset of another?</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/lalr_item_set.html#is_superset_of(weka.core.parser.java_cup.lalr_item_set)">is_superset_of</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other)</CODE><BR> Is this set an (improper) superset of another?</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#remove(weka.core.parser.java_cup.lalr_item_set)">remove</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other)</CODE><BR> Remove (set subtract) a complete set.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html#remove(weka.core.parser.java_cup.lalr_item)">remove</A></B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item.html" title="class in weka.core.parser.java_cup">lalr_item</A> itm)</CODE><BR> Remove a single item if it is in the set.</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/lalr_item_set.html#size()">size</A></B>()</CODE><BR> Size of the set</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/lalr_item_set.html#toString()">toString</A></B>()</CODE><BR> Convert to 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 NAME="lalr_item_set()"><!-- --></A><H3>lalr_item_set</H3><PRE>public <B>lalr_item_set</B>()</PRE><DL><DD>Constructor for an empty set.<P></DL><HR><A NAME="lalr_item_set(weka.core.parser.java_cup.lalr_item_set)"><!-- --></A><H3>lalr_item_set</H3><PRE>public <B>lalr_item_set</B>(<A HREF="../../../../weka/core/parser/java_cup/lalr_item_set.html" title="class in weka.core.parser.java_cup">lalr_item_set</A> other) throws <A HREF="../../../../weka/core/parser/java_cup/internal_error.html" title="class in weka.core.parser.java_cup">internal_error</A></PRE><DL><DD>Constructor for cloning from another set.<P><DL><DT><B>Parameters:</B><DD><CODE>other</CODE> - indicates set we should copy from.<DT><B>Throws:</B><DD><CODE><A HREF="../../../../weka/core/parser/java_cup/internal_error.html" title="class in weka.core.parser.java_cup">internal_error</A></CODE></DL></DL><!-- ============ METHOD DETAIL ========== -->⌨️ 快捷键说明
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