54 lines
2.1 KiB
Java
54 lines
2.1 KiB
Java
/*
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* Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has
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* intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation,
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* these intellectual property rights may include one or more of the U.S.
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* patents listed at http://www.sun.com/patents and one or more additional
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* patents or pending patent applications in the U.S. and in other countries.
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* U.S. Government Rights - Commercial software. Government users are subject
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* to the Sun Microsystems, Inc. standard license agreement and applicable
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* provisions of the FAR and its supplements. Use is subject to license terms.
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* Sun, Sun Microsystems, the Sun logo and Java are trademarks or registered
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* trademarks of Sun Microsystems, Inc. in the U.S. and other countries. This
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* product is covered and controlled by U.S. Export Control laws and may be
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* subject to the export or import laws in other countries. Nuclear, missile,
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* chemical biological weapons or nuclear maritime end uses or end users,
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* whether direct or indirect, are strictly prohibited. Export or reexport
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* to countries subject to U.S. embargo or to entities identified on U.S.
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* export exclusion lists, including, but not limited to, the denied persons
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* and specially designated nationals lists is strictly prohibited.
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*/
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package csjavacc.struct;
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import csjavacc.parser.NfaState;
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/**
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* Describes zero-or-one regular expressions (<foo?>).
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*/
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public class RZeroOrOne extends RegularExpression {
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/**
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* The regular expression which is repeated zero or one times.
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*/
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public RegularExpression regexpr;
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public Nfa GenerateNfa(boolean ignoreCase)
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{
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Nfa retVal = new Nfa();
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NfaState startState = retVal.start;
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NfaState finalState = retVal.end;
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Nfa temp = regexpr.GenerateNfa(ignoreCase);
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startState.AddMove(temp.start);
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startState.AddMove(finalState);
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temp.end.AddMove(finalState);
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return retVal;
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}
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}
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