IterNode.java

/*
 ***** BEGIN LICENSE BLOCK *****
 * Version: EPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/epl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2004-2006 Thomas E Enebo <enebo@acm.org>
 * 
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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 * in which case the provisions of the GPL or the LGPL are applicable instead
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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;
import org.jruby.runtime.BlockBody;

/**
 * Represents a block.  
 */
public class IterNode extends Node {
    private final Node varNode;
    private final Node bodyNode;
    
    // What static scoping relationship exists when it comes into being.
    private StaticScope scope;

    /**
     *  Used by Truffle 'for' and by ForNode only.
     * This is to support 1.8-style assignments which only 'for' expressions use.
     */
    public IterNode(ISourcePosition position, Node args, StaticScope scope, Node body) {
        super(position);

        this.varNode = args;
        this.scope = scope;
        this.bodyNode = body;
    }

    /**
     * Used for all non-for types of blocks.
     */
    public IterNode(ISourcePosition position, ArgsNode args, Node body, StaticScope scope) {
        super(position);

        this.varNode = args;
        this.bodyNode = body;
        this.scope = scope;
    }

    public int getArgumentType() {
        return BlockBody.asArgumentType(varNode.getNodeType());
    }

    public NodeType getNodeType() {
        return NodeType.ITERNODE;
    }

    /**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public <T> T accept(NodeVisitor<T> iVisitor) {
        return iVisitor.visitIterNode(this);
    }

    public StaticScope getScope() {
        return scope;
    }

    /**
     * Gets the bodyNode.
     * @return Returns a Node
     */
    public Node getBodyNode() {
        return bodyNode;
    }

    /**
     * Gets the varNode.
     * @return Returns a Node
     */
    public Node getVarNode() {
        return varNode;
    }
    
    public List<Node> childNodes() {
        return Node.createList(varNode, bodyNode);
    }
}