/*
* $Id: ConditionalNode.java,v 1.6 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.core.Any;
import anvil.codec.Code;
import anvil.codec.Source;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class ConditionalNode
*
* @author: Jani Lehtim�ki
*/
public class ConditionalNode extends MultiParent
{
public ConditionalNode(Node left, Node middle, Node right)
{
super(3);
setChild(0, left);
setChild(1, middle);
setChild(2, right);
}
public int typeOf()
{
return Node.EXPR_CONDITIONAL;
}
public Any eval()
{
Any result = getChild(0).eval();
if (result.toBoolean()) {
return getChild(1).eval();
} else {
return getChild(2).eval();
}
}
public void compile(ByteCompiler context, int operation)
{
getChild(0).compile(context, GET_BOOLEAN);
Code code = context.getCode();
Source isfalse = code.if_eq();
getChild(1).compile(context, operation);
Source out = code.go_to();
code.popop();
isfalse.bind();
getChild(2).compile(context, operation);
out.bind();
}
}