001 /*
002 $Id: PrefixExpression.java,v 1.4 2005/02/01 10:46:54 russel Exp $
003
004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005
006 Redistribution and use of this software and associated documentation
007 ("Software"), with or without modification, are permitted provided
008 that the following conditions are met:
009
010 1. Redistributions of source code must retain copyright
011 statements and notices. Redistributions must also contain a
012 copy of this document.
013
014 2. Redistributions in binary form must reproduce the
015 above copyright notice, this list of conditions and the
016 following disclaimer in the documentation and/or other
017 materials provided with the distribution.
018
019 3. The name "groovy" must not be used to endorse or promote
020 products derived from this Software without prior written
021 permission of The Codehaus. For written permission,
022 please contact info@codehaus.org.
023
024 4. Products derived from this Software may not be called "groovy"
025 nor may "groovy" appear in their names without prior written
026 permission of The Codehaus. "groovy" is a registered
027 trademark of The Codehaus.
028
029 5. Due credit should be given to The Codehaus -
030 http://groovy.codehaus.org/
031
032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043 OF THE POSSIBILITY OF SUCH DAMAGE.
044
045 */
046 package org.codehaus.groovy.ast.expr;
047
048 import org.codehaus.groovy.ast.GroovyCodeVisitor;
049 import org.codehaus.groovy.classgen.AsmClassGenerator;
050 import org.codehaus.groovy.syntax.Token;
051
052 /**
053 * Represents a prefix expression like ++foo or --bar
054 *
055 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
056 * @version $Revision: 1.4 $
057 */
058 public class PrefixExpression extends Expression {
059
060 private Token operation;
061 private Expression expression;
062
063 public PrefixExpression(Token operation, Expression expression) {
064 this.operation = operation;
065 this.expression = expression;
066 }
067
068 public String toString() {
069 return super.toString() + "[" + operation + expression + "]";
070 }
071
072 public void visit(GroovyCodeVisitor visitor) {
073 visitor.visitPrefixExpression(this);
074 }
075
076 public Expression transformExpression(ExpressionTransformer transformer) {
077 return new PrefixExpression(operation, transformer.transform(expression));
078 }
079
080 protected void resolveType(AsmClassGenerator resolver) {
081 expression.resolve(resolver);
082 setTypeClass(expression.getTypeClass());
083 }
084
085 public void setExpression(Expression expression) {
086 this.expression = expression;
087 }
088
089 public Token getOperation() {
090 return operation;
091 }
092
093 public Expression getExpression() {
094 return expression;
095 }
096
097 public String getText() {
098 return "(" + operation.getText() + expression.getText() + ")";
099 }
100 public Class getTypeClass() {
101 return expression.getTypeClass();
102 }
103
104 public String getType() {
105 return expression.getType();
106 }
107
108 }