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Nashorn is an Open Source JavaScript (ECMAScript 5.1 and some 6 features) engine for the JVM.

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/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package org.openjdk.nashorn.api.tree;

import org.openjdk.nashorn.internal.ir.ForNode;

final class ForOfLoopTreeImpl extends StatementTreeImpl implements ForOfLoopTree {
    private final ExpressionTree lhsExpr;
    private final ExpressionTree expr;
    private final StatementTree stat;

    ForOfLoopTreeImpl(final ForNode node,
            final ExpressionTree lhsExpr,
            final ExpressionTree expr,
            final StatementTree stat) {
        super(node);
        assert node.isForIn() : "for ..in expected";
        this.lhsExpr = lhsExpr;
        this.expr = expr;
        this.stat = stat;
    }

    @Override
    public Kind getKind() {
        return Kind.FOR_IN_LOOP;
    }

    @Override
    public ExpressionTree getVariable() {
        return lhsExpr;
    }

    @Override
    public ExpressionTree getExpression() {
        return expr;
    }

    @Override
    public StatementTree getStatement() {
        return stat;
    }

    @Override
    public  R accept(final TreeVisitor visitor, final D data) {
        return visitor.visitForOfLoop(this, data);
    }
}