/*

 * Copyright (c) 1994, 2003, 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 sun.tools.tree;

import sun.tools.java.*;

/**

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

public

class BinaryShiftExpression extends BinaryExpression {

    /**

     * constructor

     */

    public BinaryShiftExpression(int op, long where, Expression left, Expression right) {

        super(op, where, left.type, left, right);

    }

    /**

     * Evaluate the expression

     */

    Expression eval() {

        // The eval code in BinaryExpression.java only works correctly

        // for arithmetic expressions.  For shift expressions, we get cases

        // where the left and right operand may legitimately be of mixed

        // types (long and int).  This is a fix for 4082814.

        if (left.op == LONGVAL && right.op == INTVAL) {

            return eval(((LongExpression)left).value,

                        ((IntExpression)right).value);

        }

        // Delegate the rest of the cases to our parent, so as to minimize

        // impact on existing behavior.

        return super.eval();

    }

    /**

     * Select the type

     */

    void selectType(Environment env, Context ctx, int tm) {

        if (left.type == Type.tLong) {

            type = Type.tLong;

        } else if (left.type.inMask(TM_INTEGER)) {

            type = Type.tInt;

            left = convert(env, ctx, type, left);

        } else {

            type = Type.tError;

        }

        if (right.type.inMask(TM_INTEGER)) {

            right = new ConvertExpression(where, Type.tInt, right);

        } else {

            right = convert(env, ctx, Type.tInt, right);

        }

    }

}