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[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / internal / compiler / ast / FalseLiteral.java
1 /*******************************************************************************
2  * Copyright (c) 2000, 2003 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials 
4  * are made available under the terms of the Common Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/cpl-v10.html
7  * 
8  * Contributors:
9  *     IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package net.sourceforge.phpeclipse.internal.compiler.ast;
12
13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
14 import net.sourceforge.phpdt.internal.compiler.codegen.Label;
15 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
16 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
17 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
18
19 public class FalseLiteral extends MagicLiteral {
20         static final char[] source = {'f', 'a', 'l', 's', 'e'};
21 public FalseLiteral(int s , int e) {
22         super(s,e);
23 }
24 public void computeConstant() {
25
26         constant = Constant.fromValue(false);}
27 /**
28  * Code generation for false literal
29  *
30  * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
31  * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
32  * @param valueRequired boolean
33  */
34 //public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
35 //      int pc = codeStream.position;
36 //      if (valueRequired)
37 //              codeStream.iconst_0();
38 //      codeStream.recordPositionsFrom(pc, this.sourceStart);
39 //}
40 //public void generateOptimizedBoolean(BlockScope currentScope, CodeStream codeStream, Label trueLabel, Label falseLabel, boolean valueRequired) {
41 //
42 //      // falseLabel being not nil means that we will not fall through into the FALSE case
43 //
44 //      int pc = codeStream.position;
45 //      if (valueRequired) {
46 //              if (falseLabel != null) {
47 //                      // implicit falling through the TRUE case
48 //                      if (trueLabel == null) {
49 //                              codeStream.goto_(falseLabel);
50 //                      }
51 //              }
52 //      }
53 //      codeStream.recordPositionsFrom(pc, this.sourceStart);
54 //}
55 public TypeBinding literalType(BlockScope scope) {
56         return BooleanBinding;
57 }
58 /**
59  * 
60  */
61 public char[] source() {
62         return source;
63 }
64 public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
65         visitor.visit(this, scope);
66         visitor.endVisit(this, scope);
67 }
68 }