src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/CompoundAssignmentTreeImpl.java

/*
 * Copyright (c) 2015, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.nashorn.api.tree;

import jdk.nashorn.internal.ir.BinaryNode;

final class CompoundAssignmentTreeImpl extends ExpressionTreeImpl implements CompoundAssignmentTree {

    private final ExpressionTree var, expr;
    private final Kind kind;

    CompoundAssignmentTreeImpl(final BinaryNode node, final ExpressionTree left, final ExpressionTree right) {
        super(node);
        assert node.isAssignment() : "not an assignment node";
        this.var = left;
        this.expr = right;
        this.kind = getOperator(node.tokenType());
        assert kind != Tree.Kind.ASSIGNMENT : "compound assignment expected";
    }

    @Override
    public Kind getKind() {
        return kind;
    }

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

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

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