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/*******************************************************************************
* 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.codegen.*;
import org.eclipse.wst.jsdt.internal.compiler.lookup.*;
public class NullLiteral extends MagicLiteral {
static final char[] source = {'n' , 'u' , 'l' , 'l'};
public NullLiteral(int s , int e) {
super(s,e);
}
public void computeConstant() {
constant = NotAConstant;
}
/**
* Code generation for the null 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.aconst_null();
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
public TypeBinding literalType(BlockScope scope) {
return NullBinding;
}
/**
*
*/
public char[] source() {
return source;
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
visitor.visit(this, scope);
visitor.endVisit(this, scope);
}
}
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