/******************************************************************************* | |
* Copyright (c) 2000, 2004 IBM Corporation and others. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Common Public License v1.0 | |
* which accompanies this distribution, and is available at | |
* http://www.eclipse.org/legal/cpl-v10.html | |
* | |
* Contributors: | |
* IBM Corporation - initial API and implementation | |
*******************************************************************************/ | |
package org.eclipse.wst.jsdt.internal.compiler.ast; | |
import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor; | |
import org.eclipse.wst.jsdt.internal.compiler.impl.*; | |
import org.eclipse.wst.jsdt.internal.compiler.codegen.*; | |
import org.eclipse.wst.jsdt.internal.compiler.lookup.*; | |
public class FalseLiteral extends MagicLiteral { | |
static final char[] source = {'f', 'a', 'l', 's', 'e'}; | |
public FalseLiteral(int s , int e) { | |
super(s,e); | |
} | |
public void computeConstant() { | |
constant = Constant.fromValue(false);} | |
/** | |
* Code generation for false literal | |
* | |
* @param currentScope org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope | |
* @param codeStream org.eclipse.wst.jsdt.internal.compiler.codegen.CodeStream | |
* @param valueRequired boolean | |
*/ | |
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) { | |
int pc = codeStream.position; | |
if (valueRequired) | |
codeStream.iconst_0(); | |
codeStream.recordPositionsFrom(pc, this.sourceStart); | |
} | |
public void generateOptimizedBoolean(BlockScope currentScope, CodeStream codeStream, Label trueLabel, Label falseLabel, boolean valueRequired) { | |
// falseLabel being not nil means that we will not fall through into the FALSE case | |
int pc = codeStream.position; | |
if (valueRequired) { | |
if (falseLabel != null) { | |
// implicit falling through the TRUE case | |
if (trueLabel == null) { | |
codeStream.goto_(falseLabel); | |
} | |
} | |
} | |
codeStream.recordPositionsFrom(pc, this.sourceStart); | |
} | |
public TypeBinding literalType(BlockScope scope) { | |
return BooleanBinding; | |
} | |
/** | |
* | |
*/ | |
public char[] source() { | |
return source; | |
} | |
public void traverse(ASTVisitor visitor, BlockScope scope) { | |
visitor.visit(this, scope); | |
visitor.endVisit(this, scope); | |
} | |
} |