/***** 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) 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 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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* use your version of this file under the terms of the CPL, indicate your
* 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.ast.visitor.NodeVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.lexer.yacc.ISourcePositionHolder;
/**
* Represents a while stetement. This could be the both versions:
*
* while <condition> <body> end
*
* and
*
* <body> 'while' <condition>
*
* @author jpetersen
*/
public class WhileNode extends Node {
static final long serialVersionUID = -5355364190446060873L;
protected final Node conditionNode;
protected final Node bodyNode;
private final boolean evaluateAtStart;
private final ISourcePositionHolder keyword;
private final ISourcePositionHolder end;
/**
* @return the end
*/
public ISourcePositionHolder getEnd() {
return end;
}
/**
* @return the keyword
*/
public ISourcePositionHolder getKeyword() {
return keyword;
}
public WhileNode(ISourcePosition position, Node conditionNode,
Node bodyNode, ISourcePositionHolder keyword,
ISourcePositionHolder end) {
this(position, conditionNode, bodyNode, true, keyword, end);
}
protected WhileNode(ISourcePosition position, Node conditionNode,
Node bodyNode, boolean evalAtStart, ISourcePositionHolder keyword,
ISourcePositionHolder end) {
super(position, NodeTypes.WHILENODE);
this.conditionNode = conditionNode;
this.bodyNode = bodyNode;
this.evaluateAtStart = evalAtStart;
this.keyword = keyword;
this.end = end;
}
/**
* Accept for the visitor pattern.
*
* @param iVisitor
* the visitor
**/
public Instruction accept(NodeVisitor iVisitor) {
return iVisitor.visitWhileNode(this);
}
/**
* Gets the bodyNode.
*
* @return Returns a Node
*/
public Node getBodyNode() {
return bodyNode;
}
/**
* Gets the conditionNode.
*
* @return Returns a Node
*/
public Node getConditionNode() {
return conditionNode;
}
/**
* Determine whether this is while or do while
*
* @return true if you are a while, false if do while
*/
public boolean evaluateAtStart() {
return evaluateAtStart;
}
public List childNodes() {
return Node.createList(conditionNode, bodyNode);
}
public boolean isBlock() {
return true;
}
public static class Inline extends WhileNode {
/**
* @param position
* @param conditionNode
* @param bodyNode
* @param evalAtStart
* @param end
*/
public Inline(ISourcePosition position, Node conditionNode,
Node bodyNode, boolean evalAtStart,
ISourcePositionHolder keyword) {
super(position, conditionNode, bodyNode, evalAtStart, keyword, null);
}
public boolean isBlock() {
return false;
}
public List childNodes() {
return Node.createList(bodyNode, conditionNode);
}
}
}