/* * 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.tools.tree; import sun.tools.java.*;import java.util.Hashtable; /** * Parenthesised expressions. * * 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. */ publicclass ExprExpression extends UnaryExpression {    /**     * Constructor     */    public ExprExpression(long where, Expression right) {        super(EXPR, where, right.type, right);    }     /**     * Check a condition.  We must pass it on to our unparenthesised form.     */    public void checkCondition(Environment env, Context ctx, Vset vset,                               Hashtable exp, ConditionVars cvars) {        right.checkCondition(env, ctx, vset, exp, cvars);        type = right.type;    }     /**     * Check the expression if it appears as an lvalue.     * We just pass it on to our unparenthesized subexpression.     * (Part of fix for 4090372)     */    public Vset checkAssignOp(Environment env, Context ctx,                              Vset vset, Hashtable exp, Expression outside) {        vset = right.checkAssignOp(env, ctx, vset, exp, outside);        type = right.type;        return vset;    }     /**     * Delegate to our subexpression.     * (Part of fix for 4090372)     */    public FieldUpdater getUpdater(Environment env, Context ctx) {        return right.getUpdater(env, ctx);    }     // Allow (x) = 9;    //    // I will hold off on this until I'm sure about it.  Nobody's    // going to clammer for this one.    //    // public Vset checkLHS(Environment env, Context ctx,    //     Vset vset, Hashtable exp) {    //     vset = right.check(env, ctx, vset, exp);    //     type = right.type;    //     return vset;    // }     public boolean isNull() {        return right.isNull();    }     public boolean isNonNull() {        return right.isNonNull();    }     // Probably not necessary    public Object getValue() {        return right.getValue();    }     /**     * Delegate to our subexpression.     * See the comment in AddExpression#inlineValueSB() for     * information about this method.     */    protected StringBuffer inlineValueSB(Environment env,                                         Context ctx,                                         StringBuffer buffer) {        return right.inlineValueSB(env, ctx, buffer);    }     /**     * Select the type of the expression     */    void selectType(Environment env, Context ctx, int tm) {        type = right.type;    }     /**     * Simplify     */    Expression simplify() {        return right;    }}