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 * except in compliance with the License. You may obtain a copy of
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 * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
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package org.jruby.ast;

import java.util.List;

import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.parser.StaticScope;

A 'for' statement.  This is implemented using iter and that is how MRI does things,
but 'for's do not have their own stack, so doing this way is mildly painful.
See Also:
IterNode/**
 * A 'for' statement.  This is implemented using iter and that is how MRI does things,
 * but 'for's do not have their own stack, so doing this way is mildly painful.
 * 
 * @see IterNode
 */
public class ForNode extends IterNode {
    private Node iterNode;

    public ForNode(ISourcePosition position, Node varNode, Node bodyNode, Node iterNode, StaticScope scope, int endLine) {
        // For nodes do not have their own scope so we pass null to indicate this.
        // 'For's are implemented as blocks in evaluation, but they have no scope so we
        // just deal with this lack of scope throughout its lifespan.  We should probably
        // change the way this works to get rid of multiple null checks.
        super(position, varNode, scope, bodyNode, endLine);
        
        assert iterNode != null : "iterNode is not null";
        
        this.iterNode = iterNode;
    }

    public ArgsNode getArgsNode() {
        throw new IllegalArgumentException("For nodes are not technically def nodes so they do not have args");
    }

    @Override
    public NodeType getNodeType() {
        return NodeType.FORNODE;
    }
    
    public Node getIterNode() {
        return iterNode;
    }

    
Accept for the visitor pattern.
Params:
iVisitor – the visitor/**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    @Override
    public <T> T accept(NodeVisitor<T> iVisitor) {
        return iVisitor.visitForNode(this);
    }
    
    @Override
    public List<Node> childNodes() {
        return Node.createList(getVarNode(), getBodyNode(), iterNode);
    }
}