/*

 * 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

 * particular file as subject to the "Classpath" exception as provided

 *

 * 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.

 *

 */

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.

 */

public

class 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;

    }

}