production.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>production</TITLE><META NAME="keywords" CONTENT="weka.core.parser.java_cup.production class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="production";}</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/parser.html" title="class in weka.core.parser.java_cup"><B>PREV CLASS</B></A> <A HREF="../../../../weka/core/parser/java_cup/production_part.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/production.html" target="_top"><B>FRAMES</B></A> <A HREF="production.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 production</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>weka.core.parser.java_cup.production</B></PRE><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../weka/core/parser/java_cup/action_production.html" title="class in weka.core.parser.java_cup">action_production</A></DD></DL><HR><DL><DT><PRE>public class <B>production</B><DT>extends java.lang.Object</DL></PRE><P>This class represents a production in the grammar. It contains a LHS non terminal, and an array of RHS symbols. As various transformations are done on the RHS of the production, it may shrink. As a result a separate length is always maintained to indicate how much of the RHS array is still valid.<p> I addition to construction and manipulation operations, productions provide methods for factoring out actions (see remove_embedded_actions()), for computing the nullability of the production (i.e., can it derive the empty string, see check_nullable()), and operations for computing its first set (i.e., the set of terminals that could appear at the beginning of some string derived from the production, see check_first_set()).<P><P><DL><DT><B>Version:</B></DT> <DD>last updated: 7/3/96</DD><DT><B>Author:</B></DT> <DD>Frank Flannery</DD><DT><B>See Also:</B><DD><A HREF="../../../../weka/core/parser/java_cup/production_part.html" title="class in weka.core.parser.java_cup"><CODE>production_part</CODE></A>, <A HREF="../../../../weka/core/parser/java_cup/symbol_part.html" title="class in weka.core.parser.java_cup"><CODE>symbol_part</CODE></A>, <A HREF="../../../../weka/core/parser/java_cup/action_part.html" title="class in weka.core.parser.java_cup"><CODE>action_part</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/production.html#production(weka.core.parser.java_cup.non_terminal, weka.core.parser.java_cup.production_part[], int)">production</A></B>(<A HREF="../../../../weka/core/parser/java_cup/non_terminal.html" title="class in weka.core.parser.java_cup">non_terminal</A> lhs_sym, <A HREF="../../../../weka/core/parser/java_cup/production_part.html" title="class in weka.core.parser.java_cup">production_part</A>[] rhs_parts, int rhs_l)</CODE><BR> Constructor with no action string.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#production(weka.core.parser.java_cup.non_terminal, weka.core.parser.java_cup.production_part[], int, int, int)">production</A></B>(<A HREF="../../../../weka/core/parser/java_cup/non_terminal.html" title="class in weka.core.parser.java_cup">non_terminal</A> lhs_sym, <A HREF="../../../../weka/core/parser/java_cup/production_part.html" title="class in weka.core.parser.java_cup">production_part</A>[] rhs_parts, int rhs_l, int prec_num, int prec_side)</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#production(weka.core.parser.java_cup.non_terminal, weka.core.parser.java_cup.production_part[], int, java.lang.String)">production</A></B>(<A HREF="../../../../weka/core/parser/java_cup/non_terminal.html" title="class in weka.core.parser.java_cup">non_terminal</A> lhs_sym, <A HREF="../../../../weka/core/parser/java_cup/production_part.html" title="class in weka.core.parser.java_cup">production_part</A>[] rhs_parts, int rhs_l, java.lang.String action_str)</CODE><BR> Full constructor.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#production(weka.core.parser.java_cup.non_terminal, weka.core.parser.java_cup.production_part[], int, java.lang.String, int, int)">production</A></B>(<A HREF="../../../../weka/core/parser/java_cup/non_terminal.html" title="class in weka.core.parser.java_cup">non_terminal</A> lhs_sym, <A HREF="../../../../weka/core/parser/java_cup/production_part.html" title="class in weka.core.parser.java_cup">production_part</A>[] rhs_parts, int rhs_l, java.lang.String action_str, int prec_num, int prec_side)</CODE><BR> </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> <A HREF="../../../../weka/core/parser/java_cup/action_part.html" title="class in weka.core.parser.java_cup">action_part</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#action()">action</A></B>()</CODE><BR> An action_part containing code for the action to be performed when we reduce with this production.</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="../../../../weka/core/parser/java_cup/production.html#all()">all</A></B>()</CODE><BR> Access to all productions.</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/terminal_set.html" title="class in weka.core.parser.java_cup">terminal_set</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#check_first_set()">check_first_set</A></B>()</CODE><BR> Update (and return) the first set based on current NT firsts.</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/production.html#check_nullable()">check_nullable</A></B>()</CODE><BR> Check to see if the production (now) appears to be nullable.</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="../../../../weka/core/parser/java_cup/production.html#clear()">clear</A></B>()</CODE><BR> </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/production.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> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#equals(weka.core.parser.java_cup.production)">equals</A></B>(<A HREF="../../../../weka/core/parser/java_cup/production.html" title="class in weka.core.parser.java_cup">production</A> other)</CODE><BR> Equality comparison.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <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/production.html#find(int)">find</A></B>(int indx)</CODE><BR> Lookup a production by index.</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/terminal_set.html" title="class in weka.core.parser.java_cup">terminal_set</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#first_set()">first_set</A></B>()</CODE><BR> First set of the production.</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/production.html#hashCode()">hashCode</A></B>()</CODE><BR> Produce a hash code.</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/production.html#index()">index</A></B>()</CODE><BR> Index number 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/symbol_part.html" title="class in weka.core.parser.java_cup">symbol_part</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../weka/core/parser/java_cup/production.html#lhs()">lhs</A></B>()</CODE><BR> The left hand side non-terminal.</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/production.html#note_reduction_use()">note_reduction_use</A></B>()</CODE><BR> Increment the count of reductions with 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="../../../../weka/core/parser/java_cup/production.html#nullable_known()">nullable_known</A></B>()</CODE><BR> Is the nullability of the production known or unknown?</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/production.html#nullable()">nullable</A></B>()</CODE><BR> Nullability of the production (can it derive the empty string).</TD></TR>⌨️ 快捷键说明
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