Source Code Cross Referenced for ReturnStatement.java in  » Template-Engine » Tea » com » go » tea » parsetree » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Template Engine » Tea » com.go.tea.parsetree 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ====================================================================
002:         * Tea - Copyright (c) 1997-2000 Walt Disney Internet Group
003:         * ====================================================================
004:         * The Tea Software License, Version 1.1
005:         *
006:         * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
007:         *
008:         * Redistribution and use in source and binary forms, with or without
009:         * modification, are permitted provided that the following conditions
010:         * are met:
011:         *
012:         * 1. Redistributions of source code must retain the above copyright
013:         *    notice, this list of conditions and the following disclaimer.
014:         *
015:         * 2. Redistributions in binary form must reproduce the above copyright
016:         *    notice, this list of conditions and the following disclaimer in
017:         *    the documentation and/or other materials provided with the
018:         *    distribution.
019:         *
020:         * 3. The end-user documentation included with the redistribution,
021:         *    if any, must include the following acknowledgment:
022:         *       "This product includes software developed by the
023:         *        Walt Disney Internet Group (http://opensource.go.com/)."
024:         *    Alternately, this acknowledgment may appear in the software itself,
025:         *    if and wherever such third-party acknowledgments normally appear.
026:         *
027:         * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
028:         *    not be used to endorse or promote products derived from this
029:         *    software without prior written permission. For written
030:         *    permission, please contact opensource@dig.com.
031:         *
032:         * 5. Products derived from this software may not be called "Tea",
033:         *    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
034:         *    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
035:         *    written permission of the Walt Disney Internet Group.
036:         *
037:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
038:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
039:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
040:         * DISCLAIMED.  IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
041:         * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
042:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
043:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
044:         * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
045:         * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
046:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
047:         * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
048:         * ====================================================================
049:         *
050:         * For more information about Tea, please see http://opensource.go.com/.
051:         */
052:
053:        package com.go.tea.parsetree;
054:
055:        import com.go.tea.compiler.SourceInfo;
056:
057:        /******************************************************************************
058:         * A ReturnStatement allows the values of Expressions to be returned from an
059:         * execution scope. If the expression is null, then void is returned.
060:         *
061:         * @author Brian S O'Neill
062:         * @version
063:         * <!--$$Revision:--> 12 <!-- $-->, <!--$$JustDate:--> 01/05/31 <!-- $-->
064:         */
065:        public class ReturnStatement extends Statement {
066:            private Expression mExpr;
067:
068:            public ReturnStatement(SourceInfo info, Expression expr) {
069:                super (info);
070:                mExpr = expr;
071:            }
072:
073:            /**
074:             * Construct a ReturnStatement from just an expression and its SourceInfo.
075:             */
076:            public ReturnStatement(Expression expr) {
077:                this (expr.getSourceInfo(), expr);
078:            }
079:
080:            /**
081:             * Construct a ReturnStatement that returns void.
082:             */
083:            public ReturnStatement(SourceInfo info) {
084:                this (info, null);
085:            }
086:
087:            public Object accept(NodeVisitor visitor) {
088:                return visitor.visit(this );
089:            }
090:
091:            public Object clone() {
092:                ReturnStatement rs = (ReturnStatement) super .clone();
093:                rs.mExpr = (Expression) mExpr.clone();
094:                return rs;
095:            }
096:
097:            public boolean isReturn() {
098:                return true;
099:            }
100:
101:            public boolean isBreak() {
102:                return true;
103:            }
104:
105:            /**
106:             * Returns the expression to return or null if void is returned.
107:             */
108:            public Expression getExpression() {
109:                return mExpr;
110:            }
111:
112:            public void setExpression(Expression expr) {
113:                mExpr = expr;
114:            }
115:        }
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