/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common 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/cpl-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) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* decision by deleting the provisions above and replace them with the notice
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* the provisions above, a recipient may use your version of this file under
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***** END LICENSE BLOCK *****/
package org.jruby.ast;
import java.util.List;
import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.ast.util.ArgsUtil;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.ASTInterpreter;
import org.jruby.evaluator.AssignmentVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.javasupport.util.RuntimeHelpers;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
public class MultipleAsgnNode extends AssignableNode {
private final ListNode headNode;
private final Node argsNode;
public MultipleAsgnNode(ISourcePosition position, ListNode headNode, Node argsNode) {
super(position, NodeType.MULTIPLEASGNNODE);
this.headNode = headNode;
this.argsNode = argsNode;
}
/**
* Accept for the visitor pattern.
* @param iVisitor the visitor
**/
public Instruction accept(NodeVisitor iVisitor) {
return iVisitor.visitMultipleAsgnNode(this);
}
/**
* Gets the argsNode.
* @return Returns a INode
*/
public Node getArgsNode() {
return argsNode;
}
/**
* Gets the headNode.
* @return Returns a ListNode
*/
public ListNode getHeadNode() {
return headNode;
}
/**
* Number of arguments is dependent on headNodes size
*/
@Override
public Arity getArity() {
if (argsNode != null) {
return Arity.required(headNode == null ? 0 : headNode.size());
}
return Arity.fixed(headNode.size());
}
public List<Node> childNodes() {
return Node.createList(headNode, argsNode, getValueNode());
}
@Override
public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
switch (getValueNode().nodeId) {
case ARRAYNODE: {
ArrayNode iVisited2 = (ArrayNode) getValueNode();
return ASTInterpreter.multipleAsgnArrayNode(runtime, context, this, iVisited2, self, aBlock);
}
case SPLATNODE: {
SplatNode splatNode = (SplatNode) getValueNode();
RubyArray rubyArray = RuntimeHelpers.splatValue(splatNode.getValue().interpret(runtime, context, self, aBlock));
return AssignmentVisitor.multiAssign(runtime, context, self, this, rubyArray, false);
}
default:
IRubyObject value = getValueNode().interpret(runtime, context, self, aBlock);
if (!(value instanceof RubyArray)) {
value = RubyArray.newArray(runtime, value);
}
return AssignmentVisitor.multiAssign(runtime, context, self, this, (RubyArray)value, false);
}
}
@Override
public IRubyObject assign(Ruby runtime, ThreadContext context, IRubyObject self, IRubyObject value, Block block, boolean checkArity) {
if (!(value instanceof RubyArray)) {
value = ArgsUtil.convertToRubyArray(runtime, value, headNode != null);
}
return AssignmentVisitor.multiAssign(runtime, context, self, this, (RubyArray) value, checkArity);
}
}