1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.nashorn.api.tree;
  27 
  28 import jdk.nashorn.internal.ir.BinaryNode;
  29 
  30 final class CompoundAssignmentTreeImpl extends ExpressionTreeImpl implements CompoundAssignmentTree {
  31 
  32     private final ExpressionTree var, expr;
  33     private final Kind kind;
  34     
  35     CompoundAssignmentTreeImpl(final BinaryNode node, final ExpressionTree left, final ExpressionTree right) {
  36         super(node);
  37         assert node.isAssignment() : "not an assignment node";
  38         this.var = left;
  39         this.expr = right;
  40         this.kind = getOperator(node.tokenType());
  41         assert kind != Tree.Kind.ASSIGNMENT : "compound assignment expected";
  42     }
  43 
  44     @Override
  45     public Kind getKind() {
  46         return kind;
  47     }
  48     
  49     @Override
  50     public ExpressionTree getVariable() {
  51         return var;
  52     }
  53     
  54     @Override
  55     public ExpressionTree getExpression() {
  56         return expr;
  57     }
  58     
  59     @Override
  60     public <R,D> R accept(TreeVisitor<R,D> visitor, D data) {
  61         return visitor.visitCompoundAssignment(this, data);
  62     }
  63 }