/*
* $Id: ExpressionList.java,v 1.13 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.core.AnyTuple;
import anvil.codec.Code;
import anvil.codec.ConstantPool;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class ExpressionList
*
* @author: Jani Lehtim�ki
*/
public class ExpressionList extends MultiParent
{
public ExpressionList(int childs)
{
super(childs);
}
public ExpressionList(Node child)
{
super(1);
setChild(0, child);
}
public ExpressionList(Node left, Node right)
{
super(2);
setChild(0, left);
setChild(1, right);
}
public ExpressionList(Node left, Node middle, Node right)
{
super(3);
setChild(0, left);
setChild(1, middle);
setChild(2, right);
}
public ExpressionList(Node[] childs)
{
super(childs.length);
for(int i=childs.length-1; i>=0; i--) {
setChild(i, childs[i]);
}
}
public ExpressionList(Expression[] childs, Node rightmost)
{
super(childs.length + 1);
int n = childs.length;
for(int i=n-1; i>=0; i--) {
setChild(i, childs[i].getChild());
}
setChild(n, rightmost);
}
public int typeOf()
{
return EXPR_LIST;
}
public Any eval()
{
if (childs() > 0) {
return new AnyTuple(evalChilds(0));
} else {
return Any.EMPTY_TUPLE;
}
}
public void compile(ByteCompiler context, int operation)
{
Code code = context.getCode();
ConstantPool pool = code.getPool();
int clazz = pool.addClass("anvil/core/AnyTuple");
int n = childs();
if (n > 0) {
code.anew(clazz);
code.dup();
code.iconst(n);
code.anewarray(context.TYPE_ANY);
for(int i=0; i<n; i++) {
code.dup();
code.iconst(i);
getChild(i).compile(context, GET);
code.aastore();
}
code.invokespecial(pool.addMethodRef(clazz, "<init>",
"([Lanvil/core/Any;)V"));
} else {
code.getstatic(pool.addFieldRef(context.TYPE_ANY, "EMPTY_TUPLE",
"Lanvil/core/AnyTuple;"));
}
if (operation == context.GET_BOOLEAN) {
context.any2boolean();
}
}
}