org.jruby.truffle.parser.ast.CaseParseNode Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jruby-truffle Show documentation
The newest version!
/*
 ***** 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 
 * Copyright (C) 2001-2002 Benoit Cerrina 
 * Copyright (C) 2002 Anders Bengtsson 
 * Copyright (C) 2004 Thomas E Enebo 
 * 
 * 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
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the EPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the EPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/
package org.jruby.truffle.parser.ast;

import org.jruby.truffle.language.SourceIndexLength;
import org.jruby.truffle.parser.ast.visitor.NodeVisitor;

import java.util.List;

/**
 * A Case statement.  Represents a complete case statement, including the body with its
 * when statements.
 */
public class CaseParseNode extends ParseNode {
	/**
	 * the case expression.
	 **/
    private final ParseNode caseNode;
	/**
	 * A list of all choices including else
	 */
    private final ListParseNode cases;
    private ParseNode elseNode = null;

    public CaseParseNode(SourceIndexLength position, ParseNode caseNode, ListParseNode cases) {
        super(position, caseNode != null && caseNode.containsVariableAssignment() || cases.containsVariableAssignment());

        assert cases != null : "caseBody is not null";
        // TODO: Rewriter and compiler assume case when empty expression.  In MRI this is just
        // a when.
//        assert caseNode != null : "caseNode is not null";

        this.caseNode = caseNode;
        this.cases = cases;
    }

    public void setElseNode(ParseNode elseNode) {
        this.elseNode = elseNode;
    }

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

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

    /**
     * Gets the caseNode.
	 * caseNode is the case expression
     * @return caseNode
     */
    public ParseNode getCaseNode() {
        return caseNode;
    }

    public ListParseNode getCases() {
        return cases;
    }

    public ParseNode getElseNode() {
        return elseNode;
    }

    public List childNodes() {
        return ParseNode.createList(caseNode, cases);
    }

}