01: /***** BEGIN LICENSE BLOCK *****
02: * Version: CPL 1.0/GPL 2.0/LGPL 2.1
03: *
04: * The contents of this file are subject to the Common Public
05: * License Version 1.0 (the "License"); you may not use this file
06: * except in compliance with the License. You may obtain a copy of
07: * the License at http://www.eclipse.org/legal/cpl-v10.html
08: *
09: * Software distributed under the License is distributed on an "AS
10: * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11: * implied. See the License for the specific language governing
12: * rights and limitations under the License.
13: *
14: * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
15: * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
16: * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
17: * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
18: *
19: * Alternatively, the contents of this file may be used under the terms of
20: * either of the GNU General Public License Version 2 or later (the "GPL"),
21: * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
22: * in which case the provisions of the GPL or the LGPL are applicable instead
23: * of those above. If you wish to allow use of your version of this file only
24: * under the terms of either the GPL or the LGPL, and not to allow others to
25: * use your version of this file under the terms of the CPL, indicate your
26: * decision by deleting the provisions above and replace them with the notice
27: * and other provisions required by the GPL or the LGPL. If you do not delete
28: * the provisions above, a recipient may use your version of this file under
29: * the terms of any one of the CPL, the GPL or the LGPL.
30: ***** END LICENSE BLOCK *****/package org.jruby.ast;
31:
32: import java.util.List;
33:
34: import org.jruby.ast.visitor.NodeVisitor;
35: import org.jruby.evaluator.Instruction;
36: import org.jruby.lexer.yacc.ISourcePosition;
37: import org.jruby.runtime.Arity;
38:
39: /**
40: *
41: * @author jpetersen
42: */
43: public class MultipleAsgnNode extends AssignableNode {
44: static final long serialVersionUID = 5016291105152162748L;
45:
46: private final ListNode headNode;
47: private final Node argsNode;
48:
49: public MultipleAsgnNode(ISourcePosition position,
50: ListNode headNode, Node argsNode) {
51: super (position, NodeTypes.MULTIPLEASGNNODE);
52: this .headNode = headNode;
53: this .argsNode = argsNode;
54: }
55:
56: /**
57: * Accept for the visitor pattern.
58: * @param iVisitor the visitor
59: **/
60: public Instruction accept(NodeVisitor iVisitor) {
61: return iVisitor.visitMultipleAsgnNode(this );
62: }
63:
64: /**
65: * Gets the argsNode.
66: * @return Returns a INode
67: */
68: public Node getArgsNode() {
69: return argsNode;
70: }
71:
72: /**
73: * Gets the headNode.
74: * @return Returns a ListNode
75: */
76: public ListNode getHeadNode() {
77: return headNode;
78: }
79:
80: /**
81: * Number of arguments is dependent on headNodes size
82: */
83: public Arity getArity() {
84: if (argsNode != null) {
85: return Arity.required(headNode == null ? 0 : headNode
86: .size());
87: }
88:
89: return Arity.fixed(headNode.size());
90: }
91:
92: public List childNodes() {
93: return Node.createList(headNode, argsNode, getValueNode());
94: }
95:
96: }
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