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 net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
  31  * @param codeStream net.sourceforge.phpdt.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 }