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14  * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
16  * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
17  * Copyright (C) 2004-2006 Thomas E Enebo <enebo@acm.org>
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31 package org.jruby.ast;
32
33 import org.jruby.ast.visitor.NodeVisitor;
34 import org.jruby.evaluator.Instruction;
35 import org.jruby.lexer.yacc.ISourcePosition;
36
37 /**
38  * A 'for' statement. This is implemented using iter and that is how MRI does things,
39  * but 'for's do not have their own stack, so doing this way is mildly painful.
40  *
41  * @see IterNode
42  */
43 public class ForNode extends IterNode {
44     static final long serialVersionUID = -8319863477790150586L;
45     private Node iterNode;
46
47     public ForNode(ISourcePosition position, Node varNode, Node bodyNode, Node iterNode) {
48         // For nodes do not have their own scope so we pass null to indicate this.
49 // 'For's are implemented as blocks in evaluation, but they have no scope so we
50 // just deal with this lack of scope throughout its lifespan. We should probably
51 // change the way this works to get rid of multiple null checks.
52 super(position, varNode, null, bodyNode, NodeTypes.FORNODE);
53         
54         this.iterNode = iterNode;
55     }
56     
57     public Node getIterNode() {
58         return iterNode;
59     }
60
61     /**
62      * Accept for the visitor pattern.
63      * @param iVisitor the visitor
64      **/
65     public Instruction accept(NodeVisitor iVisitor) {
66         return iVisitor.visitForNode(this);
67     }
68 }
69
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