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 java.util.LinkedList;
056: import com.go.tea.compiler.SourceInfo;
057: import com.go.tea.compiler.Type;
058:
059: /******************************************************************************
060: * A ParenExpression is a thin wrapper around an Expression that was
061: * delimited by parenthesis in the source code. A parse tree does not
062: * necessarily need a ParenExpression, but it is useful when reconstructing
063: * something that resembles the source code.
064: *
065: * @author Brian S O'Neill
066: * @version
067: * <!--$$Revision:--> 28 <!-- $-->, <!--$$JustDate:--> 01/02/01 <!-- $-->
068: */
069: public class ParenExpression extends Expression {
070: private Expression mExpr;
071:
072: public ParenExpression(SourceInfo info, Expression expr) {
073: super (info);
074: mExpr = expr;
075: }
076:
077: public Object accept(NodeVisitor visitor) {
078: return visitor.visit(this );
079: }
080:
081: public Object clone() {
082: ParenExpression pe = (ParenExpression) super .clone();
083: pe.mExpr = (Expression) mExpr.clone();
084: return pe;
085: }
086:
087: public boolean isExceptionPossible() {
088: return super .isExceptionPossible()
089: || (mExpr != null && mExpr.isExceptionPossible());
090: }
091:
092: public Type getType() {
093: return mExpr.getType();
094: }
095:
096: public Type getInitialType() {
097: return mExpr.getInitialType();
098: }
099:
100: public void convertTo(Type toType, boolean preferCast) {
101: mExpr.convertTo(toType, preferCast);
102: }
103:
104: public LinkedList getConversionChain() {
105: return mExpr.getConversionChain();
106: }
107:
108: public void setType(Type type) {
109: mExpr.setType(type);
110: }
111:
112: public void setInitialType(Type type) {
113: mExpr.setInitialType(type);
114: }
115:
116: public boolean isValueKnown() {
117: return mExpr.isValueKnown();
118: }
119:
120: public Object getValue() {
121: return mExpr.getValue();
122: }
123:
124: public Expression getExpression() {
125: return mExpr;
126: }
127:
128: public void setExpression(Expression expr) {
129: mExpr = expr;
130: }
131: }
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