/*
* $Id: InstanceOfNode.java,v 1.5 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.codec.Code;
import anvil.codec.ConstantPool;
import anvil.ErrorListener;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import anvil.script.Type;
import java.io.IOException;
/**
* class IsNode
*
* @author: Jani Lehtim�ki
*/
public class InstanceOfNode extends BinaryParent
{
protected Location _location;
public InstanceOfNode(Node left, Node right, Location location)
{
super(left, right);
_location = location;
}
public int typeOf()
{
return Node.EXPR_IS;
}
public boolean isConstant()
{
return false;
}
public void check(ErrorListener context)
{
super.check(context);
if (_right instanceof TypeNode) {
int type = ((TypeNode)_right).getType().getType();
if (type == Type.CLASS || type == Type.INTERFACE) {
return;
}
}
context.error(_location, "Right side of 'is' does not point into class or interface");
}
public void compile(ByteCompiler context, int operation)
{
Code code = context.getCode();
ConstantPool pool = code.getPool();
_left.compile(context, GET);
_right.compile(context, GET_TYPE);
code.invokevirtual(pool.addMethodRef(context.TYPE_ANY,
"isInstanceOf", "(Lanvil/script/Type;)Z"));
if (operation != GET_BOOLEAN) {
context.boolean2any();
}
}
}