/*
* $Id: InitAssignmentNode.java,v 1.3 2002/09/16 08:05:04 jkl Exp $
*
* Copyright (c) 2002 Njet Communications Ltd. All Rights Reserved.
*
* Use is subject to license terms, as defined in
* Anvil Sofware License, Version 1.1. See LICENSE
* file, or http://njet.org/license-1.1.txt
*/
package anvil.script.expression;
import anvil.Location;
import anvil.core.Any;
import anvil.core.Any.Op;
import anvil.codec.Code;
import anvil.codec.Source;
import anvil.codec.ConstantPool;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class InitAssignmentNode
*
* @author: Jani Lehtim�ki
*/
public class InitAssignmentNode extends AbstractAssignmentNode
{
public InitAssignmentNode(Location location, int childs)
{
super(location, childs);
}
public int typeOf()
{
return Node.EXPR_ASSIGN_INIT;
}
public String getOperator()
{
return "?=";
}
protected String getAssignmentMethod()
{
return "init";
}
protected void compileOperation(ByteCompiler context, final Node left, final Node right)
{
left.compile(context, new Node() {
public void compile(ByteCompiler context, int operation)
{
Code code = context.getCode();
ConstantPool pool = code.getPool();
left.compile(context, GET);
code.dup();
code.invokevirtual(pool.addMethodRef(context.TYPE_ANY, "isUndefined", "()Z"));
Source isfalse = code.if_eq();
code.pop();
right.compile(context, GET);
isfalse.bind();
}
});
}
}